CN106641421B

CN106641421B - Valve structure of coded lock

Info

Publication number: CN106641421B
Application number: CN201611036156.0A
Authority: CN
Inventors: 李涛
Original assignee: Shenzhen Lanyang Technology Co ltd
Current assignee: Shenzhen Lanyang Technology Co ltd
Priority date: 2016-11-08
Filing date: 2016-11-08
Publication date: 2020-04-03
Anticipated expiration: 2036-11-08
Also published as: CN106641421A

Abstract

The invention relates to the technical field of valve structures, and discloses a coded lock valve structure which comprises a valve assembly, wherein the valve assembly comprises a valve body with a through air passage, a coded lock assembly is arranged on the valve body, and the coded lock assembly comprises a coded lock which can axially rotate by a preset coded angle to control the air passage to be switched on and switched off. According to the coded lock valve structure provided by the invention, the coded lock capable of axially rotating is arranged in the valve body, and the unlocking mechanism is used for directly or indirectly driving the coded lock to axially rotate, so that the coded lock can control the on-off of the air passage after rotating by a preset coded angle, and thus, the purpose of limiting filling fluid filling or allowing filling fluid filling can be realized, the limit filling safety is high, and the operation is simple.

Description

Valve structure of coded lock

Technical Field

The invention relates to the technical field of valve structures, in particular to a coded lock valve structure.

Background

Liquefied gas, oxygen, hydrogen, carbon dioxide and other gases are commonly used in daily production and life, and the gases are generally inflammable and high in pressure and have strong dangerousness. Some gases cannot be mixed with other gases, which can cause serious safety accidents, for example, if the oxygen cylinder is filled with hydrogen, explosion can be caused when the oxygen cylinder is used. Liquefied gas occupies a large market share in China due to cleanness and environmental protection, but the accident rate is high due to high danger, and once an accident occurs in public places, the damage is large.

At present, liquefied gas is filled at fixed points according to safety regulation requirements, but cross filling is common due to various reasons, so that the potential safety hazard is greatly improved. There are two general types of valves available on the market for controlling filling: one is that a filling limiting mechanism is arranged in an angle valve, a high-frequency electronic tag is arranged outside the angle valve, the information of the gas cylinder and the information of a client and the like are recorded in the high-frequency electronic tag, when filling is carried out, a high-frequency electronic tag reader-writer on an inflation gun reads the information in the high-frequency electronic tag on the angle valve, whether the client allows filling and whether the gas cylinder allows filling are judged, if yes, a solenoid coil on the inflation gun is powered, the solenoid coil generates magnetic force to open the filling limiting mechanism in the angle valve, the technology has the advantages that whether filling is allowed or not can be distinguished by equipment through the high-frequency electronic tag and the filling limiting mechanism, manual intervention is not needed, the defects are two, 1) the filling limiting mechanisms in all the angle valves are the same, whether filling is authorized or not can be identified only through the high-frequency electronic tag, and once one of a plurality of gas cylinders is copied or cracked, then the limit charging mechanisms of all the angle valves can be opened; 2) the electromagnetic coil is also easy to control, a high-frequency electronic tag does not need to be read to identify the identity of the angle valve, the electromagnetic coil is directly powered, and the magnetic field of the electromagnetic coil can also open a filling limiting mechanism in the angle valve to fill liquefied gas into the gas cylinder. The other valve is controlled by a password mode, a valve rod is locked by adopting a password lock principle, the valve rod cannot rotate in a password-unopened state, and the valve rod can be rotated to open the valve after a password is correctly opened; the disadvantages are that the password needs to be memorized by people and turned according to the word disc on the valve to open the password, the valve can be opened once the password is leaked, the safety is reduced, and different passwords of each valve need to be memorized every time, which brings great troubles to the operation.

Disclosure of Invention

The invention aims to provide a valve structure of a coded lock, and aims to solve the problems that the existing liquefied gas cylinder valve is poor in filling limiting safety and troublesome in operation in the prior art.

The embodiment of the invention provides a coded lock valve structure which comprises a valve assembly, wherein the valve assembly comprises a valve body with a through air passage, a coded lock assembly is arranged on the valve body, and the coded lock assembly comprises a coded lock which rotates by a preset coded angle to control the air passage to be switched on and off.

In an embodiment of the present invention, the combination lock assembly further includes a fixed cylinder connected to the valve body and communicating with the air passage, and a blocking body disposed in the fixed cylinder and used for blocking the air passage, and the combination lock is disposed between the fixed cylinder and the valve body and can limit the blocking body from moving to release the blocking of the blocking body on the air passage.

Furthermore, the bottom end of the valve body is provided with an extension part communicated with the air passage, one end of the fixed cylinder is connected with the extension part, and the coded lock is arranged in the extension part; the fixed cylinder is internally provided with a vent hole which is communicated with the air passage and can be matched with the plugging body in a plugging way, and the plugging body can plug the vent hole under the action of fluid pushing.

Furthermore, the coded lock comprises a shaft sleeve arranged in the extending part in a positioning mode, a lock cylinder arranged on the shaft sleeve in a movable sleeve mode, a first spring used for resetting the lock cylinder, a locking plate group which is sleeved on the shaft sleeve and positioned in the lock cylinder and can be matched with the lock cylinder in a locking mode to limit the lock cylinder to move axially, and a locking shaft which is inserted in the shaft sleeve and used for driving the locking plate group to rotate axially to remove the locking plate group and the lock cylinder in a locking mode.

Furthermore, the coded lock further comprises a ball blocking frame which is arranged at one end, close to the vent hole, of the lock cylinder and used for abutting against the blocking body to enable the blocking body to be separated from the vent hole, and the blocking body is a spherical sealing ball.

Furthermore, the lock piece group comprises a first lock piece and a second lock piece which are movably sleeved on the shaft sleeve and are distributed at intervals along the axial direction of the shaft sleeve; the inner wall of the lock cylinder is provided with a convex block strip extending along the axial direction of the lock cylinder, the outer edges of the first locking plate and the second locking plate are respectively provided with a first groove and a second groove for avoiding the convex block strip, and the convex block strip is provided with a first notch for avoiding the outer edge of the first locking plate; the lug strip movably extends into the second groove to form axial rotation positioning.

Furthermore, the one end that is close to the air vent on the lock shaft is connected with and is used for driving the locking plate group carries out axial pivoted and drives the piece, offer on the outer fringe of driving the piece and be used for dodging the third recess of lug strip, just offer on the lug strip and be used for dodging drive the second breach of piece outer fringe.

Further, drive the piece with first locking plate with coaxial and interval distribution of second locking plate, drive the piece first locking plate reaches all be provided with the cover between the second locking plate and locate on the axle sleeve and rather than axial rotational positioning's stationary blade.

Further, drive the piece orientation initiative bumping post has on the side of first locking plate, it has first driven bumping post to stretch out outward on the relative both sides face of first locking plate, it has the driven bumping post of second to stretch out outward on the relative both sides face of second locking plate, initiative bumping post first driven bumping post and the driven bumping post of second are supported and are kept out the cooperation.

Further, the first driven bumping post is including being located respectively first principal and subordinate movable bumping post and first vice driven bumping post on the relative both sides face of first locking plate, the second driven bumping post is including being located respectively second principal and subordinate movable bumping post and the vice driven bumping post of second on the relative both sides face of second locking plate, the initiative bumping post with first principal and subordinate movable bumping post keeps out the cooperation, first vice driven bumping post with the cooperation of keeping out is kept out to the second principal and subordinate movable bumping post.

Furthermore, a second spring which can jack the sealing ball up is arranged on the vent hole.

In another embodiment of the present invention, the blocking body is connected with the lock piece set in an axial rotation positioning manner and can be locked and matched with the lock cylinder, and the blocking body can be separated from the lock cylinder and move towards the vent hole.

Further, a second spring capable of jacking the blocking body is arranged on the vent hole.

Furthermore, the lock piece group comprises a first lock piece and a second lock piece which are movably sleeved on the shaft sleeve; the inner wall of the lock cylinder is provided with a convex block strip extending along the axial direction of the lock cylinder, the outer edge of the first locking plate is provided with a first convex block, and the convex block strip is provided with a first notch used for avoiding the first convex block; and an avoiding groove for avoiding the convex block strip is formed in the outer edge of the second locking plate, and the convex block strip movably extends into the avoiding groove to form axial rotation positioning.

Furthermore, the lock piece group is still including connect in the lock axle be close to be used for driving of the one end of air vent first lock piece reaches the second lock piece carries out axial pivoted and drives the piece, the jam body with it is connected to drive the axial rotation location of piece.

Further, the blocking body comprises a connecting part axially and rotationally positioned and connected with the driving piece, and a spherical head arranged at one end, close to the vent hole, of the connecting part and used for blocking the vent hole.

Furthermore, a second bump is arranged on the outer edge of the connecting part, and a second notch used for avoiding the second bump is formed in the bump strip.

Further, drive the piece orientation initiative bumping post has on the side of first locking plate, it has first driven bumping post to stretch out outward on the relative both sides face of first locking plate, the orientation of second locking plate it has the driven bumping post of second to stretch out on the side of first locking plate, initiative bumping post first driven bumping post and the driven bumping post of second support the cooperation of keeping off.

Furthermore, the first driven catch column comprises a first main driven catch column and a first auxiliary driven catch column which are respectively positioned on two opposite side surfaces of the first locking plate, the driving catch column is in abutting fit with the first main driven catch column, and the first auxiliary driven catch column is in abutting fit with the second driven catch column.

In another embodiment of the present invention, the combination lock includes a lock plate set axially rotatable in the valve body to control the opening and closing of the air passage, and a lock shaft connected to the lock plate set for driving the lock plate set to axially rotate to control the opening and closing of the air passage.

Furthermore, the bottom end of the valve body is provided with an extension part communicated with the air passage, the lock sheet group and the lock shaft are arranged in the extension part, and the outer edge of the lock sheet group is sealed with the inner wall of the extension part.

Furthermore, the lock piece group comprises a first lock piece and a second lock piece which can be axially sleeved on the lock shaft in a rotating manner, and the first lock piece and the second lock piece are respectively provided with a first vent hole and a second vent hole; the first locking plate and the second locking plate are tightly attached and sealed, and the outer edge of the first locking plate and/or the second locking plate is sealed with the inner wall of the extending part.

Further, the lock piece group is still including being used for driving first locking plate with the second locking plate winds the lock axle carries out axial pivoted and drives the locking plate, it locates to drive the locking plate cover the lock is epaxial and rather than axial rotation location connection.

Furthermore, a third vent hole which is used for matching the first vent hole and the second vent hole to penetrate through the air passage is formed in the driving lock piece; the driving locking plate and the first locking plate are tightly attached and sealed with each other.

Further, drive the locking plate orientation initiative bumping post has on the side of first locking plate, it has first driven bumping post to stretch out outward on the relative both sides face of first locking plate, the orientation of second locking plate it has the driven bumping post of second to stretch out on the side of first locking plate, initiative bumping post first driven bumping post and the driven bumping post of second support the cooperation of keeping off.

Furthermore, a positioning block is fixedly arranged on the lock shaft, a positioning groove matched with the positioning block is formed in the driving locking plate, and the positioning block is accommodated in the positioning groove to form axial rotation positioning.

Further, the lock shaft is close to in the cover can be dismantled to the one end of second locking plate and is equipped with the locating part, the locating part with the locating piece cooperation is pressed from both sides tightly drive the locking plate first locking plate reaches the second locking plate.

Furthermore, an air outlet seam for air outlet is formed in the outer wall of the lock shaft, and the air outlet seam extends from one end of the air outlet seam to the other end of the air outlet seam along the length direction of the lock shaft.

Based on the technical scheme, the coded lock valve structure provided by the embodiment of the invention has the advantages that the coded lock capable of axially rotating is arranged in the valve body, and the unlocking mechanism is used for directly or indirectly driving the coded lock to axially rotate, so that the coded lock realizes the control of the on-off of the air passage after rotating by a preset coded angle, the purpose of limiting the filling of filling fluid or allowing the filling of the filling fluid can be realized, the limit filling safety is high, and the operation is simple.

Drawings

Fig. 1 is a schematic cross-sectional view of a valve structure of a combination lock according to a first embodiment of the present invention;

fig. 2 is a schematic partial cross-sectional view of a valve structure of a combination lock according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a combination lock according to a first embodiment of the present invention;

FIG. 4 is a perspective view of a lock cylinder according to a first embodiment of the present invention;

fig. 5 is a perspective view of a first locking plate according to a first embodiment of the present invention;

fig. 6 is a cross-sectional view of the first locking plate according to the first embodiment of the present invention;

fig. 7 is a perspective view of a second locking plate according to a first embodiment of the present invention;

fig. 8 is a cross-sectional view of a second locking plate according to a first embodiment of the present invention;

fig. 9 is a schematic perspective view of a driving plate according to a first embodiment of the invention;

fig. 10 is a schematic cross-sectional view of a valve structure of a combination lock according to a second embodiment of the present invention;

fig. 11 is a schematic partial cross-sectional view of a valve structure of a combination lock according to a second embodiment of the present invention;

FIG. 12 is a perspective view of a lock cylinder according to a second embodiment of the present invention;

fig. 13 is a perspective view of a second locking piece according to a second embodiment of the present invention;

fig. 14 is a perspective view of the first locking piece according to the second embodiment of the present invention;

fig. 15 is a schematic perspective view of an occluding body in a second embodiment of the present invention;

FIG. 16 is a perspective view of a driving plate according to a second embodiment of the present invention;

fig. 17 is a schematic sectional view of a valve structure of a combination lock according to a third embodiment of the present invention;

fig. 18 is a schematic partial cross-sectional view of a valve structure of a combination lock according to a third embodiment of the present invention;

fig. 19 is a schematic perspective view of a lock shaft according to a third embodiment of the present invention;

fig. 20 is a schematic perspective view of a third embodiment of the present invention, showing a locking plate being driven with one side facing upward;

fig. 21 is a schematic perspective view of the driving locking plate according to the third embodiment of the present invention, with the other side facing upward;

fig. 22 is a perspective view of the first locking piece of the third embodiment of the present invention showing a side of the first locking piece facing upward;

fig. 23 is a perspective view of the first locking piece of the third embodiment of the present invention showing the other side of the first locking piece facing upward;

fig. 24 is a perspective view of the second locking piece according to the third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, it should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting. The following describes the implementation of the present invention in detail with reference to specific embodiments.

As shown in fig. 1 to 24, the present invention provides a valve structure of a combination lock, which may include a valve assembly 1, where the valve assembly 1 may include a valve body 11, a valve plug 12, a valve rod 13 and a handwheel 14, where the valve body 11 has a through air passage M therein, the valve plug 12 is located inside an upper end of the valve body 11, an outer end of the valve rod 13 is connected to the handwheel 14, a bottom end of the valve rod 13 extends into an upper end of the valve body 11 and is connected to and matched with the valve plug 12, and the handwheel 14 is rotated clockwise or counterclockwise to drive the valve rod 13, so as to drive the valve plug 12 to realize on-off control of an upper section and a. Here, the valve body 11 is provided with a coded lock assembly 2 capable of controlling the on-off of the air passage M, and the on-off of the air passage M can be controlled by the coded lock assembly 2 under the condition that the valve is opened by rotating the hand wheel 14 and driving the valve plug 12 through the valve rod 13, so that the on-off of the whole coded lock valve structure can be realized. Here, the coded lock assembly 2 may include a coded lock 23, and the coded lock 23 may control the opening and closing of the air passage M by axially rotating a predetermined coded angle, that is, by rotating a handwheel 14 through a valve rod 13 by an automatic unlocking mechanism (not shown in the drawings), the valve plug 12 is driven, and the coded lock 23 is directly or indirectly driven to axially rotate the predetermined coded angle, so as to control the opening and closing of the air passage M. Therefore, the coded lock 23 capable of axially rotating is arranged in the valve body 11, the unlocking mechanism is used for directly or indirectly driving the coded lock 23 to axially rotate, the coded lock 23 controls the air channel M to be switched on and off after rotating for a preset coded angle, the purpose of limiting filling of fluid or allowing filling of fluid can be achieved, the limitation filling safety is high, and the operation is simple.

The coded lock valve structure or the gas cylinder is provided with a label which can be a high-frequency or ultrahigh-frequency electronic label, a one-dimensional bar code or a two-dimensional code and the like. The label is provided with the password of the valve structure of the password lock, the information of the gas cylinder, the affiliated customer and the like. When the gas cylinder is filled, the tag reader-writer reads information in the tag, whether the gas cylinder is allowed to be filled is judged, if the gas cylinder is allowed to be filled, the coded lock 23 of the coded lock valve structure is opened through the unlocking mechanism according to the code in the tag, so that a medium (namely the fluid can be liquefied gas) can be filled into the gas cylinder, otherwise, the medium cannot be filled into the gas cylinder when the coded lock 23 is not opened, the purpose of limiting filling is achieved, and potential safety hazards caused by illegal filling are avoided.

Compared with the prior art, the coded lock valve structure provided by the invention has the following characteristics:

1) the structure of the valve of the coded lock provided by the embodiment of the invention can be almost the same, and the codes can be different as long as the positions of the lock plate retaining columns are different, so that the number of the codes is huge, and the cracking difficulty is high;

2) the valve structure of the coded lock provided by the embodiment of the invention does not need a digital word disk, and even if the code is known, the coded lock 23 is difficult to open due to incapability of positioning;

3) in the embodiment of the invention, the password is stored on the label, and the password is obtained by reading the label before unlocking, so that an operator does not need to remember the password, the unlocking mechanism can unlock the password lock 23, the dependence on people is eliminated, and meanwhile, the automatic operation can be realized. That is to say, because the label of record identity and password cooperates with trick lock 23 for cross filling has obtained effective control, has stopped illegal filling, error filling action, has promoted the security, and easy operation.

The first embodiment is as follows:

referring to fig. 1 to 9, in the present embodiment, the combination lock assembly 2 may include a fixed cylinder 21 connected to the valve body 11 and communicating with the air passage M, and a blocking body 22 movably disposed in the fixed cylinder 21 for blocking the air passage M. The combination lock 23 is disposed between the fixed cylinder 21 and the valve body 11, and the combination lock 23 can press against the blocking body 22 to prevent the blocking body from blocking the air passage M. In this embodiment, the blocking body 22 is movably disposed in the fixed cylinder 21, and the combination lock 23 capable of resisting and limiting the movement of the blocking body 22 to release the blocking of the air passage M by the blocking body is disposed between the fixed cylinder 21 and the valve body 11, so that, in a locked state of the combination lock 23, the combination lock 23 is separated from the blocking body 22, so that the filling fluid can push the blocking body 22 to block the air passage M to achieve the purpose of limiting the filling; in addition, under the unlocking state of the coded lock 23, the filling fluid can push the coded lock 23 to abut against the limiting blocking body 22 to move so as to remove the blocking of the air passage M, and then the filling purpose can be realized.

The bottom end of the valve body 11 has an extension 112 that can be connected to a gas cylinder (liquefied gas cylinder, oxygen cylinder, etc.) or a pipe, and the extension 112 communicates with the gas passage M. Specifically, one end of the fixed cylinder 21 extends into the extending portion 112 to form a fixed connection and a communication, and meanwhile, the blocking body 22 and the coded lock 23 are arranged in a cavity formed by connecting the fixed cylinder 21 and the extending portion 112, where the coded lock 23 is specifically located in the extending portion 112, and the blocking body 22 is located in the fixed cylinder 21; here, a vent hole 2100 communicating with the airway M is provided in the fixed cylinder 21, and the blocking body 22 can block the vent hole 2100 by the pushing action of the fluid to block the airway M.

In this embodiment, the combination lock 23 may include a coaxially disposed sleeve 231, a lock cylinder 232, a lock plate set 233, a lock shaft 234 and a first spring 238, wherein the sleeve 231 is positioned and disposed in the extension portion 112, i.e., the sleeve cannot move axially in the extension portion 112. The lock cylinder 232 is movably sleeved on the shaft sleeve 231, wherein the lock cylinder 232 can axially rotate on the shaft sleeve and can axially move along the shaft sleeve, and the limit position of the lock cylinder 232 moving towards the outer end of the shaft sleeve along the axial direction is the top end of the shaft sleeve. The first spring 238 is sleeved on the shaft sleeve 231 and located in the lock cylinder 232, two ends of the first spring 238 respectively abut against the inner end surface of the top end of the lock cylinder 232 and the middle position of the shaft sleeve 231, and the first spring 238 is used for resetting the axial movement of the lock cylinder 232. In addition, the locking plate set 233 is located in the locking barrel 232 and sleeved on a partial section of the shaft sleeve 231 located in the locking barrel 232, and the locking plate set 233 can be locked and matched with the locking barrel 232 to limit the axial movement of the locking barrel 232; the lock shaft 234 is movably inserted into the shaft sleeve 231, and here, the lock shaft 234 is used for driving the lock plate set 233 to axially rotate so as to release the locking engagement of the lock plate set 233 and the lock cylinder 232.

In addition, the combination lock 23 may further include a ball blocking frame 235, the ball blocking frame 235 is disposed at an end of the lock cylinder 232 close to the vent hole 2100, the ball blocking frame 235 is configured to abut against the blocking body 22 to separate from the vent hole 2100, where when the unlocking mechanism drives the lock shaft 234 to rotate to drive the lock plate set 233 to rotate to release the lock of the lock cylinder 232, the filling fluid may push the lock cylinder 232, so that the ball blocking frame 235 at the end of the lock cylinder 232 abuts against the blocking body 22 to push the blocking body 22 away from the vent hole 2100, thereby opening the vent hole 2100, and achieving the filling purpose. In this embodiment, the occluding body 22 is preferably a spherical sealing ball that fits the profile of the vent 2100, although the occluding body 22 may have other shapes. Here, a valve plug shaft 15 is inserted through the center of the valve plug 12, and the valve plug shaft 15 is connected to the locking shaft 234. When the lock is unlocked, the handwheel 14 is rotated by the unlocking mechanism, the valve rod 13 drives the valve plug piece 16 and the valve plug 12 to axially rotate, and the valve plug shaft 15 drives the lock shaft 234 to axially rotate so as to unlock. In other embodiments of the present invention, the combination lock 23 may have other configurations, and is not limited herein.

In this embodiment, the locking plate set 233 includes a first locking plate 2331 and a second locking plate 2332, the first locking plate 2331 and the second locking plate 2332 are movably sleeved on an end of the shaft sleeve 231 close to the vent hole 2100, and the first locking plate 2331 and the second locking plate 2332 are spaced apart from each other in the axial direction of the shaft sleeve 231. Here, the inner wall of the lock cylinder 232 has a protrusion bar 2321 extending along the axial direction thereof, and the outer edges of the first lock plate 2331 and the second lock plate 2332 are respectively provided with a first groove 2331a and a second groove 2332a for avoiding the protrusion bar 2321, where the protrusion bar 2321 movably extends into the second groove 2332a to form an axial rotation positioning, that is, the lock cylinder 232 and the second lock plate 2332 form an axial rotation positioning, and the lock cylinder 232 can rotate synchronously with the axial rotation of the second lock plate 2332. Here, the protrusion bar 2321 is provided with a first notch 2321a for avoiding an outer edge of the first lock 2331, the outer edge of the first lock 2331 movably extends into the first notch 2321a of the protrusion bar 2321 to form an axial linear movement limit, and the first lock 2331 does not interfere with the protrusion bar 2321 when axially rotating around the shaft sleeve 231. When the first and

second recesses

2331a, 2332a are aligned, the first recess 2331a faces the first notch 2321a and the lock plate set 233 is in the unlocked state, and the lock cylinder 232 can move linearly in its axial direction relative to the first and

second lock plates

2331, 2332. When the outer edge of the first locking plate 2331 is movably received in the first notch 2321a to form an axial linear movement limiting fit, the locking plate set 233 is in a locking state. In this embodiment, when the first locking plate 2331 is rotated axially about the bushing 231 until the first recess 2331a is aligned with the first notch 2321a, the first recess 2331a is aligned with the second recess 2332a and the locking is released, at which time the filling fluid can push the lock cylinder 232 to move axially along. Here, the number of rotation angles of the first locking plate 2331 and the number of rotation angles of the second locking plate 2332 correspond to one code, respectively. Here, in this embodiment, the outer edge of the first locking plate 2331 is preferably provided with two first grooves 2331a spaced 180 ° apart, and the outer edge of the second locking plate 2332 is preferably provided with two second grooves 2332a spaced 180 ° apart, and the widths of the first grooves 2331a and the second grooves 2332a are greater than or equal to the width of the protruding block 2321 on the inner wall of the locking cylinder 232; two tabs 2321 spaced 180 ° apart are preferably provided on the inner wall of lock cylinder 232. In other embodiments of the present invention, the lock tab set 233 may include other numbers of lock tabs, or the lock tab set 233 may have other configurations.

In this embodiment, an end of the lock shaft 234 near the vent 2100 is connected to a driving plate 2333, and the driving plate 2333 is used for driving the lock plate set 233 to rotate axially. In addition, a third groove 2333a for avoiding the protruding bar 2321 is formed on the outer edge of the driving plate 2333, and a second notch 2321b for avoiding the outer edge of the driving plate 2333 is formed on the protruding bar 2321. When the lock shaft 234 rotates axially, the driver plate 2333 rotates axially synchronously, and the driver plate 2333 drives the lock plate set 233 to rotate axially. When the first, second and

third recesses

2331a, 2332a, 2333a are aligned simultaneously, the first recess 2331a faces the first notch 2321a and the third recess 2333a faces the second notch 2321b, so that the lock cylinder 232 can move linearly in the axial direction relative to the first and

second lock plates

2331, 2332 and the driver plate 2333, and the entire combination lock 23 is unlocked. When the outer edge of the first lock 2331 is movably received in the first notch 2321a to form the axial linear movement limiting fit, or the outer edge of the driver 2333 is movably received in the second notch 2321b to form the axial linear movement limiting fit, or the first lock 2331 and the driver 2333 are simultaneously in the axial linear movement limiting fit, the entire combination lock 23 is in the locked state. Here, when the driver 2333 drives the first locking plate 2331 and the second locking plate 2332 to rotate axially until the first recess 2331a and the second recess 2332a and the third recess 2333a are aligned simultaneously, the first recess 2331a is aligned with the first notch 2321a, the third recess 2333a is aligned with the second notch 2321b, the locking is released, and the lock cylinder 232 is pushed to move axially by the filling fluid. Here, the outer edge of the driving plate 2333 is preferably formed with two third recesses 2333a spaced 180 ° apart, and the width of the third recesses 2333a is preferably greater than or equal to the width of the protruding bar 2321 on the inner wall of the lock cylinder 232.

In this embodiment, the driver strap 2333 is coaxial with and spaced apart from the first locking strap 2331 and the second locking strap 2332, and the fixing straps 2334 are disposed between the driver strap 2333 and the first locking strap 2331 and the second locking strap 2332, and more preferably: a fixing plate 2334 is disposed between the driving plate 2333 and the first locking plate 2331, between the first locking plate 2331 and the second locking plate 2332, and outside the second locking plate 2332, each fixing plate 2334 is sleeved on the shaft sleeve 231, and each fixing plate 2334 is axially and rotatably positioned with the shaft sleeve 231, that is, each fixing plate 2334 is synchronously and axially rotated along with the axial rotation of the shaft sleeve 231. By arranging the fixing plates 2334, the independent rotation of the adjacent first locking plate 2331 and second locking plate 2332 does not interfere before the two are in abutting engagement, and the driving plate 2333 and the first locking plate 2331 do not interfere with each other, that is, before the abutting engagement, the driving plate 2333 does not drive the first locking plate 2331 adjacent to the driving plate to rotate when rotating, and the first locking plate 2331 does not drive the second locking plate 2332 adjacent to the driving plate to rotate when rotating, or vice versa, so that the unlocking accuracy is ensured. Here, one end of the first spring 238 abuts against the inner end surface of the tip end of the lock cylinder 232, and the other end of the first spring 238 abuts against a fixing plate 2334 on the outer side of the second locking plate 2332. Of course, in other embodiments of the present invention, the unlocking accuracy may also be improved by other manners, which is not limited herein.

In this embodiment, the side of the driving plate 2333 facing the first locking plate 2331 has a driving catch 2333H, opposite sides of the first locking plate 2331 have a first driven catch 2331H extending outwardly, opposite sides of the second locking plate 2332 have a second driven catch 2332H extending outwardly, and the driving catch 2333H, the first driven catch 2331H and the second driven catch 2332H are in abutting engagement. Specifically, the first driven catch column 2331H includes a first main driven catch column 2331H and a first auxiliary driven catch column 2331H ' respectively located on opposite side surfaces of the first lock plate 2331, and correspondingly, the second driven catch column 2332H includes a second main driven catch column 2332H and a second auxiliary driven catch column 2332H ' respectively located on opposite side surfaces of the second lock plate 2332, wherein the main driven catch column 2333H cooperates with the first main driven catch column 2331H in an abutting manner, and the first auxiliary driven catch column 2331H ' cooperates with the second main driven catch column 2332H in an abutting manner. As mentioned above, when the lock shaft 234 rotates axially, the driving plate 2333 rotates axially synchronously, when the driving plate 2333 rotates a certain angle, the driving catch 2333H of the driving plate 2333 touches and abuts against the first driving/driven catch 2331H and drives the first lock plate 2331 to rotate axially, and when the driving plate 2333 rotates a certain angle, the first driven catch 2331H' touches and abuts against the second driving/driven catch 2332H and drives the second lock plate 2332 to rotate axially, and at the same time, the second lock plate 2332 drives the lock cylinder 232 to rotate axially. Of course, in other embodiments of the present invention, the driving engagement between the driving plate 2333, the first locking plate 2331 and the second locking plate 2332 can be performed by other means, which is not limited herein.

In this embodiment, the vent hole 2100 is provided with a second spring 24 that can push up the blocking body 22. In a natural state, the second spring 24 pushes up the blocking body 22 so as to be separated from the vent hole 2100; when the coded lock 23 is in a locked state and the filling operation is performed, the filling fluid pushes the blocking body 22 to block the vent hole 2100, so that the purpose of limiting filling is achieved; when the coded lock 23 is unlocked, during filling operation, the filling fluid pushes the lock cylinder 232, so that the ball blocking frame 235 at the end of the lock cylinder 232 pushes against the blocking body 22 to separate from the vent hole 2100, and the vent hole 2100 is communicated with the air passage M, so that filling can be smoothly performed; after filling, the first spring 238 resets the lock cylinder 232 and the second spring 24 lifts the occluding body 22. Of course, according to practical circumstances and specific requirements, the vent 2100 may not have the second spring 24, and is not limited thereto.

In an embodiment of the present invention, the unlocking step of the valve structure of the combination lock is as follows:

the first step is as follows: the unlocking mechanism is connected to the lock shaft 234 through its transmission shaft to drive the lock shaft 234 to rotate clockwise for a first password angle, and the lock shaft 234 is connected to the driver plate 2333 through a bolt, so that the lock shaft 234 drives the driver plate 2333 to rotate clockwise, and the driving catch 2333H on the driver plate 2333 contacts the first driving catch 2331H on the first lock plate 2331 after rotating a certain angle, so that the first lock plate 2331 is also driven to rotate clockwise, the first lock plate 2331 continues to rotate clockwise, the first driven catch 2331H' thereon contacts the second driving catch 2332H on the second lock plate 2332, and thus the second lock plate 2332 is also driven to rotate clockwise.

The second step is that: the transmission shaft of the unlocking mechanism rotates counterclockwise by a second code angle, which is the same as the first step, the first lock plate 2331 is driven by the driving plate 2333 to rotate counterclockwise, after the first lock plate 2331 rotates counterclockwise by a certain angle, the first notch 2331a on the outer edge of the first lock plate 2331 is opposite to the first notch 2321a on the lock cylinder 232, at this time, the first notch 2331a is aligned with the second notch 2332a on the outer edge of the second lock plate 2332, and the first lock plate 2331 cannot drive the second lock plate 2332 to rotate due to the smaller rotation angle.

The third step: the transmission shaft of the unlocking mechanism rotates clockwise by a third code angle, which is relatively small and does not drive the first lock plate 2331 to rotate, and the rotation angle can enable the third groove 2333a on the drive plate 2333 to be opposite to the second notch 2321b on the lock cylinder 232, at this time, the third groove 2333a is aligned with the first groove 2331a and the second groove 2332a simultaneously, that is, the projections of the third groove 2333a and the second groove 2332a coincide with each other in the axial direction of the lock shaft 234. At this time, the protrusion 2321 on the inner wall of the lock cylinder 232 completely coincides with the third recess 2333a on the driver plate 2333, the first recess 2331a on the first lock plate 2331, and the second recess 2332a on the second lock plate 2332 in the axial direction of the lock shaft 234, and at this time, when fluid is filled into the valve, the fluid thrust pushes the lock cylinder 232 to move toward the vent hole 2100 along the axial direction, and the ball retainer 235 at the end of the lock cylinder 232 approaches the vent hole 2100, so that the blocking body 22 is blocked and cannot block the vent hole 2100, and thus, the fluid can be filled into the valve body 11 and enter the liquefied gas cylinder. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the unlocking manner of the above-mentioned combination lock valve structure may also be adopted: the first step of counterclockwise rotation, the second step of clockwise rotation, and the third step of counterclockwise rotation, which are not limited herein.

Example two:

referring to fig. 10 to 16, in the present embodiment, the code lock assembly 2 includes a fixed cylinder 21 connected to the valve body 11 and communicating with the air passage M, and a blocking body 22a movably disposed in the fixed cylinder 21 for blocking the air passage M. The combination lock 23 is provided between the fixed cylinder 21 and the valve body 11, and the combination lock 23 can restrict the movement of the blocking body 22a to release the blocking of the air passage M. In this embodiment, the blocking body 22a is movably disposed in the fixed cylinder 21, and the combination lock 23 capable of abutting against and limiting the movement of the blocking body 22a to release the blocking of the air passage M is disposed between the fixed cylinder 21 and the valve body 11, so that, in a locked state of the combination lock 23, the combination lock 23 is separated from the blocking body 22a, so that the filling fluid can push the blocking body 22a to block the air passage M to achieve the purpose of limiting the filling; in addition, under the unlocking state of the coded lock 23, the filling fluid can push the coded lock 23 to limit the blocking body 22a to move so as to remove the blocking of the air passage M, and then the filling purpose can be realized, so that the safety of limiting filling is improved, and the operation is simple. Here, the blocking body 22a in the present embodiment is different in structure from the blocking body 22 in the first embodiment described above.

The bottom end of the valve body 11 has an extension 112 that can be connected to a gas cylinder (liquefied gas cylinder, oxygen cylinder, etc.) or a pipe, and the extension 112 communicates with the gas passage M. Specifically, one end of the fixed cylinder 21 extends into the extending portion 112 to form a fixed connection and a communication, and meanwhile, the blocking body 22a and the coded lock 23 are disposed in a cavity formed by the connection of the fixed cylinder 21 and the extending portion 112, where the coded lock 23 is specifically located in the extending portion 112, and the blocking body 22a is located in the fixed cylinder 21; here, a vent hole 2100 communicating with the airway M is provided in the fixed cylinder 21, and the blocking body 22a can block the vent hole 2100 by the pushing action of the fluid to block the airway M.

In this embodiment, the blocking body 22a is connected to the lock plate set 233 in an axially rotatable positioning manner at one end and is lockingly engageable with the lock cylinder 232, wherein the blocking body 22a can be disengaged from the lock cylinder 232 and moved toward and block the vent 2100. The locking shaft 234 drives the locking piece set 233 to axially rotate, the locking piece set 233 drives the blocking body 22a to axially rotate, when the blocking body 22a axially rotates to be separated from the locking cylinder 232, the blocking of the blocking body 22a and the locking cylinder 232 is released, at the moment, under the pushing action of filling fluid, the blocking body 22a can be pushed to the vent hole 2100 to block the vent hole, and thus the purpose of limiting filling can be achieved; the lock shaft 234 drives the lock sheet set 233 to axially rotate, the lock sheet set 233 drives the blocking body 22a to axially rotate, when the lock sheet set 233 axially rotates to the unlocking state and the blocking body 22a is not separated from the lock cylinder 232, the blocking body 22a can axially move along with the lock cylinder 232 towards the vent hole 2100, under the pushing action of the filling fluid, the blocking body 22a is pushed along with the lock cylinder 232 and moves towards the vent hole 2100 until the blocking body 22a blocks the vent hole 2100, and thus the purpose of limiting filling is achieved. On the contrary, in the state that the locking plate set 233 and the locking cylinder 232 are locked with each other, when the blocking body 22a and the locking cylinder 232 are locked, the vent hole 2100 is not blocked, the air passage M is kept unblocked, and thus the filling purpose can be realized. Here, a valve plug shaft 15 is inserted through the center of the valve plug 12, and the valve plug shaft 15 is connected to the locking shaft 234. When the lock is unlocked, the handwheel 14 is rotated by the special unlocking mechanism, the valve rod 13 drives the valve plug piece 16 and the valve plug 12 to axially rotate, and the valve plug shaft 15 drives the lock shaft 234 to axially rotate so as to unlock.

In this embodiment, the vent hole 2100 is provided with a second spring 24 that can push up the blocking body 22 a. In a natural state (i.e., when no charging fluid is pushed), the second spring 24 can lift the blocking body 22a to be separated from the vent hole 2100; when the combination lock 23 is self-locked and the blocking body 22a is locked by the combination lock 23, the vent hole 2100 is kept smooth, and the filling operation can be smoothly performed; under the state that the coded lock 23 is self-locked and the blocking body 22a is separated from the coded lock 23 (specifically, separated from the lock cylinder 232), the blocking body 22a can move axially towards the vent hole 2100 under the pushing action of the filling fluid until the vent hole 2100 is blocked to achieve the purpose of limiting filling, and after the filling fluid is removed, the blocking body 22a is jacked up under the restoring force of the second spring 24 to be separated from the vent hole 2100; in a state where the combination lock 23 is unlocked and the blocking body 22a is still locked by the combination lock 23 (i.e., the blocking body 22a is locked with the lock cylinder 232), the blocking body 22a can move axially with the lock cylinder 232 toward the vent hole 2100 under the urging of the filling fluid until the vent hole 2100 is blocked, and after the filling fluid is removed, the blocking body 22a is pushed up away from the vent hole 2100 under the restoring force of the second spring 24.

In this embodiment, the locking plate set 233 includes a first locking plate 2331 and a second locking plate 2332, the first locking plate 2331 and the second locking plate 2332 are movably sleeved on an end of the shaft sleeve 231 close to the vent hole 2100, and the first locking plate 2331 and the second locking plate 2332 are spaced apart from each other in the axial direction of the shaft sleeve 231. Here, the inner wall of the lock cylinder 232 has a protrusion bar 2321 extending along the axial direction thereof, and the outer edge of the second lock plate 2332 is opened with an avoiding groove 2332a for avoiding the protrusion bar 2321, where the protrusion bar 2321 movably extends into the avoiding groove 2332a to form axial rotation positioning, that is, the lock cylinder 232 and the second lock plate 2332 form axial rotation positioning, and the lock cylinder 232 can rotate synchronously with the axial rotation of the second lock plate 2332. In addition, a first protrusion 2331a is arranged on the outer edge of the first lock 2331, and here, a first notch 2321a for avoiding the first protrusion 2331a is arranged on the protrusion bar 2321, and since the first notch 2321a can avoid the first protrusion 2331a, the first lock 2331 cannot interfere with the protrusion bar 2321 when rotating axially around the shaft sleeve 231; here, during the axial rotation of the first lock plate 2331, when the first protrusion 2331a rotates into the first notch 2321a, the first protrusion 2331a and the first notch 2321a form an axial linear movement limit, at this time, the lock plate group 233 is in a locked state, and the lock cylinder 232 cannot move linearly in the axial direction relative to the first lock plate 2331 and the second lock plate 2332; conversely, during the axial rotation of first lock 2331, when first protrusion 2331a is rotated out of first gap 2321a, the axial linear movement therebetween is released, and lock cylinder 232 can move linearly in its axial direction relative to first lock 2331 and second lock 2332 under the pushing action of the filling fluid, where the degree of rotation of first lock 2331 corresponds to a combination. In this embodiment, the outer edge of the first locking plate 2331 is preferably provided with two first protruding blocks 2331a protruding at an interval of 180 °, and the outer edge of the second locking plate 2332 is preferably provided with two avoiding grooves 2332a protruding at an interval of 180 °, and the width of the avoiding groove 2332a is greater than or equal to the width of the protruding block 2321 on the inner wall of the locking cylinder 232; moreover, two protruding bars 2321 spaced 180 ° apart are preferably protruded on the inner wall of the lock cylinder 232. Of course, in other embodiments of the present invention, the set of locking tabs 233 may comprise other numbers of locking tabs, or the set of locking tabs 233 may have other configurations, which are not limited herein.

In this embodiment, the locking plate set 233 further includes a driving plate 2333, the driving plate 2333 is connected to an end of the locking shaft 234 near the vent 2100, where the driving plate 2333 is connected to the locking shaft 234 in an axially rotatable positioning manner, that is, the driving plate 2333 can rotate synchronously with the axial rotation of the locking shaft 234, and here, the driving plate 2333 is used for driving the first locking plate 2331 and the second locking plate 2332 to rotate axially. In addition, the blocking body 22a is axially and rotationally connected to the driving plate 2333, and here, the driving plate 2333 is further configured to drive the blocking body 22a to axially rotate to achieve the locking engagement with the lock cylinder 232.

In this embodiment, the blocking body 22a may include a connecting portion 221 and a spherical head 222, the connecting portion 221 is axially and rotatably connected to the driving plate 2333, the spherical head 222 is integrally disposed at one end of the connecting portion 221 close to the vent hole 2100, and the spherical head 222 has an outer contour adapted to the edge shape of the vent hole 2100, where the spherical head 222 is used for blocking the vent hole 2100 to block the air passage M. Of course, in other embodiments of the present invention, the blocking body 22a may also have other configurations, which are not limited herein, according to the actual situation and the specific requirements.

In this embodiment, the outer edge of the connecting portion 221 is protruded with a second protrusion 2211, and correspondingly, the protrusion bar 2321 is opened with a second gap 2321b for avoiding the second protrusion 2211, and since the second gap 2321b can avoid the second protrusion 2211, the whole blocking body 22a does not interfere with the protrusion bar 2321 when rotating axially. Here, in the process that the driving plate 2333 drives the blocking body 22a to axially rotate, when the second protrusion 2211 rotates into the second notch 2321b, the two forms an axial linear movement limit, at this time, the blocking body 22a and the lock cylinder 232 are in a locked state, the blocking body 22a cannot linearly move along the axial direction relative to the lock cylinder 232, that is, the blocking body 22a is locked by the lock cylinder 232, and when the lock cylinder 232 is unlocked, the blocking body 22a can synchronously linearly move axially along with the lock cylinder 232 under the pushing action of the filled fluid; on the contrary, in the process that the driving plate 2333 drives the blocking body 22a to axially rotate, when the second protrusion 2211 rotates out of the second notch 2321b, the axial linear movement limit between the blocking body 22a and the lock cylinder 232 is released, and under the pushing action of the filling fluid, the blocking body 22a can linearly move along the axial direction of the lock cylinder 232 relative to the lock cylinder 232, wherein the rotation angle degree of the blocking body 22a corresponds to a password. Here, two second protrusions 2211 spaced 180 ° are preferably protruded from the outer edge of the connecting portion 221, and two second notches 2321b corresponding to the second protrusions 2211 are respectively opened on the two protrusion bars 2321 spaced 180 °. Of course, in other embodiments of the present invention, other axial linear movement limit fitting manners may be adopted between the blocking body 22a and the lock cylinder 232 according to practical situations and requirements, and are not limited herein.

In this embodiment, when the lock shaft 234 rotates axially, the driver plate 2333 rotates axially synchronously, and the driver plate 2333 rotates the first lock plate 2331 and the second lock plate 2332 axially. When the first protrusion 2331a and the second protrusion 2211 respectively extend into the first notch 2321a and the second notch 2321b, the whole combination lock 23 is in a locked state, and the blocking body 22a is also in a locked state; when the first protrusion 2331a is rotated out of the first notch 2321a, the entire combination lock 23 is in an unlocked state, and at this time, the lock cylinder 232 can move linearly along the axial direction thereof relative to the first locking plate 2331, the second locking plate 2332 and the driver plate 2333; when the combination lock 23 is in the unlocked state and the second projection 2211 rotates out of the second notch 2321b, the blocking body 22a is in the unlocked state, and the filling fluid can push the lock cylinder 232 and the blocking body 22a to move towards the vent hole 2100 and block the vent hole; when the first protrusion 2331a extends into the first notch 2321a and the second protrusion 2211 rotates out of the second notch 2321b, the entire combination lock 23 is in the locked state and the blocking body 22a is in the unlocked state, at which time the filling fluid can only push the blocking body 22a towards and block the vent aperture 2100.

In this embodiment, the driving plate 2333 is coaxial with and spaced apart from the first locking plate 2331 and the second locking plate 2332, and the fixing plates 2334 are disposed between the driving plate 2333 and the first locking plate 2331 and the second locking plate 2332, and specifically, it is preferable that: a fixing plate 2334 is disposed between the driving plate 2333 and the first locking plate 2331 and between the first locking plate 2331 and the second locking plate 2332, each fixing plate 2334 is sleeved on the shaft sleeve 231, and each fixing plate 2334 is axially and rotatably positioned with the shaft sleeve 231, that is, each fixing plate 2334 is synchronously and axially rotated along with the axial rotation of the shaft sleeve 231, so that by disposing the fixing plates 2334, the independent rotation of the adjacent first locking plate 2331 and the second locking plate 2332 does not interfere before the two are in abutting fit, and the driving plate 2333 and the first locking plate 2331 do not interfere with each other, that is, before the abutting fit, the rotation of the driving plate 2333 does not drive the first locking plate 2331 adjacent thereto to rotate, the rotation of the first locking plate 2331 does not drive the second locking plate 2332 adjacent thereto to rotate, and vice versa, thereby ensuring the unlocking accuracy. Here, one end of the first spring 238 abuts against the inner end surface of the tip end of the lock cylinder 232, and the other end of the first spring 238 abuts against the outer side surface of the second locking plate 2332. Of course, according to practical situations and specific needs, in other embodiments of the present invention, the unlocking accuracy may also be improved in other ways, which is not limited herein.

In this embodiment, the side of the driving plate 2333 facing the first locking plate 2331 has a driving catch 2333H, the opposite sides of the first locking plate 2331 have a first driven catch 2331H extending outward, the side of the second locking plate 2332 facing the first locking plate 2331 has a second driven catch 2332H extending outward, and the driving catch 2333H, the first driven catch 2331H and the second driven catch 2332H are in abutting engagement. Specifically, the first driven abutment 2331H may include a first main driven abutment 2331H and a first auxiliary driven abutment 2331H 'on opposite sides of the first lock 2331, where the main abutment 2333H is in abutting engagement with the first main driven abutment 2331H and the first auxiliary driven abutment 2331H' is in abutting engagement with the second auxiliary driven abutment 2332H. When the unlocking mechanism drives the lock shaft 234 to rotate axially, the driving plate 2333 rotates synchronously and axially, when the driving plate 2333 rotates by a certain angle, the driving catch 2333H of the driving plate 2333 touches and abuts against the first driving catch 2331H and drives the first lock plate 2331 to rotate axially, and when the driving plate 2333 rotates by a certain angle, the first driven catch 2331H' touches and abuts against the second driven catch 2332H and drives the second lock plate 2332 to rotate axially, and meanwhile, the second lock plate 2332 drives the lock cylinder 232 to rotate axially.

In an embodiment of the present invention, the opening step of the valve structure of the combination lock is as follows:

the first step is as follows: a transmission component (such as a transmission shaft) of the unlocking mechanism is connected with the lock shaft 234 to drive the lock shaft 234 to rotate counterclockwise by a first password angle, the lock shaft 234 is connected with the driving plate 2333 through a bolt, so that the lock shaft 234 drives the driving plate 2333 to rotate counterclockwise, the driving catch 2333H on the driving plate 2333 contacts with the first driven catch 2331H on the first lock plate 2331 after rotating a certain angle, so that the first lock plate 2331 is also driven to rotate counterclockwise, the first lock plate 2331 continues to rotate counterclockwise, the first driven catch 2331H' thereon contacts with the second driven catch 2332H of the second lock plate 2332, so that the second lock plate 2332 is also driven to rotate counterclockwise, and because the lock cylinder 232 and the second lock cylinder 2332 are axially positioned, the lock cylinder 232 rotates counterclockwise synchronously with the second lock plate 2332;

the second step is that: the transmission shaft of the unlocking mechanism rotates clockwise by a second password angle, which is smaller, and the first locking plate 2331 is driven by the driving plate 2333 to rotate clockwise in the same way as the first step, and the first locking plate 2331 cannot drive the second locking plate 2332 to rotate because the rotation angle is smaller; when the first lock 2331 is rotated by a second combination angle, the first protrusion 2331a on the outer edge thereof is snapped into the first notch 2321a on the lock cylinder 232;

the third step: the transmission shaft of the unlocking mechanism rotates counterclockwise by a third code angle, which is relatively small and does not drive the first lock plate 2331 to rotate, and the rotation angle can enable the second projection 2211 axially positioned and connected with the outer edge of the blocking body 22a of the moving plate 2333 to be clamped in the second notch 2321b on the lock cylinder 232, at this time, when fluid is filled into the valve, the lock cylinder 232 cannot move towards the vent hole 2100 because the lock cylinder 232 is blocked by the projection 2331a of the first lock plate 2331, and the second notch 2321b on the lock cylinder 232 is in blocking fit with the second projection 2211, so that the blocking body 22a cannot move towards the vent hole 2100, and the vent hole 2100 is unblocked, thus, the filling fluid can be smoothly filled into the gas cylinder. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the unlocking manner of the above-mentioned combination lock valve structure may also be adopted: the first clockwise rotation, the second counterclockwise rotation, and the third clockwise rotation, which are not limited herein.

Example three:

referring to fig. 17 to 24, in the present embodiment, the combination lock 23 may include a lock plate set 233 and a lock shaft 234, the lock plate set 233 and the lock shaft 234 are disposed in the valve body 11 along the axial direction thereof, and the lock plate set 233 may axially rotate in the valve body 11 to control the opening and closing of the air passage M; the lock shaft 234 passes through and is connected to the lock plate set 233, and the lock shaft 234 is connected to the valve plug 12 in an axial rotation positioning manner, where the lock shaft 234 is used for driving the lock plate set 233 to rotate axially to control the opening and closing of the air passage M. Here, the corresponding code angle of the hand wheel 14 is rotated by the automatic unlocking mechanism, in the rotation process, the valve is firstly opened to communicate the upper section and the lower section of the air passage M, while the hand wheel 14 is rotated, the locking shaft 234 synchronously rotates axially, and the locking plate set 233 is driven by the locking shaft 234 to rotate axially to control the on-off of the air passage M, wherein the code angle is preset when the locking plate set 233 is produced. As described above, the lock plate set 233 capable of axially rotating and the lock shaft 234 connected to the lock plate set 233 are disposed in the valve body 11 along the axial direction thereof, and the lock shaft 234 is indirectly driven by the unlocking mechanism to rotate the lock shaft 234 by a corresponding code angle, so that the lock plate set 233 is driven by the lock shaft 234 to rotate by the corresponding code angle to control the opening and closing of the air passage M, thereby achieving the purpose of limiting the filling of the filling fluid or allowing the filling of the filling fluid, and the device has high safety in limiting the filling and is simple to operate.

In this embodiment, the bottom end of the valve body 11 has an extending portion 112 capable of being connected to a gas cylinder (a liquefied gas cylinder, an oxygen cylinder, etc.) or a pipeline, the extending portion 112 is located at the bottom end of the gas channel M and is communicated with the gas cylinder M, the locking plate set 233 and the locking shaft 234 are disposed in the extending portion 112, and the outer edge of the locking plate set 233 is sealed with the inner wall of the extending portion 112, so that the gas channel M is blocked when the locking plate set 233 is in a closed state, and the filling fluid on the upper side of the locking plate set 233 cannot pass through and enter the lower side of the locking plate set 233; on the contrary, when the locking piece set 233 is opened, the air passage M is unblocked, and the filling fluid on the upper side of the locking piece set 233 can pass through and enter the lower side of the locking piece set 233, so that the filling can be smoothly performed. In other embodiments, the sealing between the upper and lower sides of lock plate set 233 and the inner wall of extension 112 can be achieved by other means, such as providing a sealing gasket, etc.

In this embodiment, the locking plate set 233 includes a first locking plate 2331 and a second locking plate 2332 sleeved on the locking shaft 234, and the first locking plate 2331 and the second locking plate 2332 can rotate axially around the locking shaft 234. The first locking plate 2331 has a first vent hole 2331c, and the second locking plate 2332 has a second vent hole 2332c adapted to the first vent hole 2331c, wherein the second vent hole 2332c and the first vent hole 2331c are preferably the same vent holes. Here, the opposite surfaces of the first locking plate 2331 and the second locking plate 2332 are tightly adhered to each other to form a seal, and the outer edges of the first locking plate 2331 and the second locking plate 2332 are simultaneously sealed with the inner wall of the extension part 112, or the outer edge of either one of the first locking plate 2331 and the second locking plate 2332 is sealed with the inner wall of the extension part 112, so that a through-going is formed between the first locking plate 2331 and the second locking plate 2332 when the first vent hole 2331c is aligned up and down with the second vent hole 2332c during the axial rotation of the first locking plate 2331 and the second locking plate 2332, and the filling fluid can pass through between them; conversely, when the first and

second vent holes

2331c, 2332c are completely misaligned, a seal is formed between the first and

second locking tabs

2331, 2332 through which the fill fluid cannot pass. In other embodiments, the lock plate set 233 may further include other numbers of lock plates, such as three, four, or more, which are not limited herein.

In this embodiment, the lock plate set 233 further includes a driving lock plate 2333 for driving the first lock plate 2331 and the second lock plate 2332 to rotate around the lock shaft 234, and the driving lock plate 2333 is sleeved on the lock shaft 234 and is connected to the lock shaft 234 in an axial rotation positioning manner, that is, the driving lock plate 2333 can rotate synchronously with the axial rotation of the lock shaft 234, and here, the driving lock plate 2333 is preferably located on a side of the first lock plate 2331 away from the second lock plate 2332.

In this embodiment, the driving latch 2333 is provided with a third vent 2333c adapted to the first vent 2331c and the second vent 2332c, and the third vent 2333c is preferably the same as the first vent 2331c and the second vent 2332 c. Here, the driving locking plate 2333 is adjacent to the first locking plate 2331, and opposite surfaces of the first locking plate 2331 and the second locking plate 2332 are tightly attached to each other for sealing, so that the driving locking plate 2333, the first locking plate 2331 and the second locking plate 2332 are tightly attached to each other for sealing, and simultaneously, the outer edge of one or both of the first locking plate 2331 and the second locking plate 2332 is sealed with the inner wall of the extension part 112, so that in the process of driving the locking plate 2333 to drive the first locking plate 2331 and the second locking plate 2332 to axially rotate, when the third vent hole 2333c, the first vent hole 2331c and the second vent hole 2332c are aligned, the driving locking plate 2333 is communicated with the first locking plate 2331 and the second locking plate 2332, and at this time, the air passage M is communicated, and the filling fluid can; on the contrary, when any two of the third vent hole 2333c, the first vent hole 2331c and the second vent hole 2332c are completely staggered or the three are completely staggered at the same time, the locking plate group formed by the three locking plates forms a plug, and at the moment, the air passage M is blocked, and the filling fluid cannot pass through. Here, the size of the ventilation flow rate can be adjusted by adjusting the size of the overlap of the ventilation holes on the respective locking pieces.

In this embodiment, the side of the driving locking plate 2333 facing the first locking plate 2331 has a driving catch 2333H, the opposite sides of the first locking plate 2331 have a first driven catch 2331H extending outwardly, and the side of the second locking plate 2332 facing the first locking plate 2331 has a second driven catch 2332H extending outwardly. In the process of driving the locking plate 2333 to rotate the first locking plate 2331 and the second locking plate 2332 axially around the locking shaft 234, the driving catch 2333H, the first driven catch 2331H and the second driven catch 2332H can be engaged. Specifically, the first driven catch 2331H may comprise a first main driven catch 2331H and a first auxiliary driven catch 2331H 'on opposite sides of the first lock 2331, wherein the main catch 2333H may be in abutting engagement with the first main driven catch 2331H and the first auxiliary driven catch 2331H' may be in abutting engagement with the second auxiliary driven catch 2332H. Here, in the process that the unlocking mechanism drives the lock shaft 234 to axially rotate, the locking plate 2333 is driven to synchronously axially rotate along with the lock shaft 234, when the locking plate 2333 is driven to rotate by a certain angle, the driving catch 2333H of the locking plate 2333 is driven to touch and abut against the first driving catch 2331H and drive the first locking plate 2331 to axially rotate, and when the locking plate continues to rotate by a certain angle, the first driven catch 2331H' touches and abuts against the second driven catch 2332H and drive the second locking plate 2332 to axially rotate.

In this embodiment, when the relative position of the vent hole and the bumping post on any locking plate changes, the unlocking password also changes, and a great number of passwords can be generated by changing the positions of the vent hole or the bumping post, so that the difficulty of breaking the password lock assembly 2 is greatly increased.

In this embodiment, the lock shaft 234 is fixedly provided with a positioning block 234a, the driving lock plate 2333 is provided with a positioning slot 2333d adapted to the positioning block 234a, and the positioning block 234a is accommodated in the positioning slot 2333d to form an axial rotation positioning. That is, the positioning block 234a is engaged with the positioning slot 2333d in an axial rotation manner, so that the locking plate 2333 is driven to rotate synchronously with the axial rotation of the locking shaft 234.

In this embodiment, a position-limiting member 234b is detachably sleeved on one end of the lock shaft 234 close to the second lock plate 2332, and the position-limiting member 234b cooperates with the positioning block 234a to clamp the driving lock plate 2333, the first lock plate 2331, and the second lock plate 2332. Here, the limiting member 234b is preferably a nut, correspondingly, the outer wall of the lower end of the lock shaft 234 has an external thread, and the limiting member 234b is sleeved on the outer wall of the lower end of the lock shaft 234 and screwed to form a detachable fastening. Of course, in other embodiments, the driver blade 2333, the first blade 2331, and the second blade 2332 can be clamped in other manners, as is practical and desired.

In this embodiment, the outer wall of the lock shaft 234 is provided with an air outlet slit 2340, the air outlet slit 2340 extends from one end to the other end of the lock shaft 234 along the length direction of the lock shaft 234, the air outlet slit 2340 is used for supplying air to an air bottle or a pipeline for air outlet, that is, when air is used, each vent hole on the lock plate set 233 blocks the air passage M due to staggering, so that the air in the air bottle or the pipeline cannot pass through the vent hole on the lock plate set 233 for air outlet, and the air outlet slit 2340 is provided on the outer wall of the lock shaft 234, so that the air in the air bottle or the pipeline can be discharged at a small flow rate through the air outlet slit 2340, and the air use. In addition, because the gap of the air outlet slit 2340 is small, when the air passages M are blocked due to the staggered vent holes on the locking piece set 233, most of the fluid cannot be filled in a short time through the air outlet slit 2340 even if part of the fluid is filled in the air cylinder, and the purpose of limiting filling is achieved. Of course, according to practical circumstances, in other embodiments, the normal air consumption of the valve structure may be realized by other means, which is not limited herein.

In this embodiment, the outer edges of the driving locking plate 2333, the first locking plate 2331, and the second locking plate 2332 may be tightly attached to the inner wall of the extension 112, sealed by a sealing ring, or sealed by other methods, such as adding a sealing gasket; each of the lock pieces may have a plurality of vent holes corresponding to each other, and is not limited to having only one vent hole.

In this embodiment, the opening step of the above-mentioned combination lock valve structure is as follows:

the first step is as follows: the driving component of the unlocking mechanism rotates counterclockwise to indirectly drive the lock shaft 234 to rotate counterclockwise by a first password angle, the lock shaft 234 drives the lock plate 2333 to rotate counterclockwise to drive the driving catch 2333H of the lock plate 2333 to touch the first driving catch 2331H of the first lock plate 2331 after rotating by a certain angle, and thus, the first lock plate 2331 is also driven to rotate counterclockwise, the first lock plate 2331 continues to rotate counterclockwise, the first driven catch 2331H' thereon touches the second driven catch 2332H of the second lock plate 2332, and thus, the second lock plate 2332 is also driven to rotate counterclockwise;

the second step is that: the driving part of the unlocking mechanism rotates clockwise by a second code angle, which is relatively small, the first locking plate 2331 is driven by the driving locking plate 2333 to rotate clockwise, and the first locking plate 2331 cannot drive the second locking plate 2332 to rotate due to the relatively small angle; when the first locking plate 2331 is rotated by a second combination angle, the first vent hole 2331c of the first locking plate 2331 is aligned with the second vent hole 2332c of the second locking plate 2332;

the third step: the driving part of the unlocking mechanism rotates counterclockwise by a third code angle, which is relatively small, and drives the locking plate 2333 not to drive the first locking plate 2331 to rotate, and after the angle is rotated, the third vent hole 2333c on the locking plate 2333 is driven to be aligned and communicated with the first vent hole 2331c of the first locking plate 2331 and the second vent hole 2332c of the second locking plate 2332, at the moment, when the fluid is filled into the valve, the whole air passage M is unblocked because the third vent hole 2333c, the first vent hole 2331c and the second vent hole 2332c are aligned and communicated, so the filled fluid can be smoothly filled into the gas cylinder or the pipeline. Of course, in other embodiments, the unlocking manner of the above-mentioned valve structure of the combination lock may also be adopted: the first clockwise rotation, the second counterclockwise rotation, and the third clockwise rotation, which are not limited herein.

In this embodiment, if the bumping post of two adjacent locking plates does not touch together, so when the upside locking plate rotates, because the plane frictional force that produces is hugged closely with the upside locking plate to downside locking plate is less than the frictional force between this downside locking plate outer fringe and the extension inner wall, like this, the downside locking plate can not follow the rotation, and when the bumping post contact of upside locking plate and downside locking plate was in the same place, upside locking plate could take downside locking plate to rotate together, so, the accuracy that the password was unblanked has been guaranteed effectively. Here, the upper side locking piece and the lower side locking piece are only the distinction between the two adjacent locking pieces, that is, in this embodiment, the upper side locking piece and the lower side locking piece can be represented as a driver locking piece 2333 and a first locking piece 2331, or a first locking piece 2331 and a second locking piece 2332, respectively.

The above-mentioned embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications, substitutions and improvements within the technical scope of the present invention, and these modifications, substitutions and improvements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The coded lock valve structure comprises a valve assembly, wherein the valve assembly comprises a valve body with a through air passage, and is characterized in that a coded lock assembly is arranged on the valve body and comprises a coded lock which rotates by a preset coded angle to control the air passage to be switched on and off;

the coded lock assembly further comprises a fixed cylinder connected with the valve body and communicated with the air passage, and a blocking body arranged in the fixed cylinder and used for blocking the air passage, wherein the coded lock is arranged between the fixed cylinder and the valve body and can limit the blocking body to move so as to release the blocking of the blocking body on the air passage;

the bottom end of the valve body is provided with an extension part communicated with the air passage, one end of the fixed cylinder is connected with the extension part, and the coded lock is arranged in the extension part; a vent hole which is communicated with the air passage and can be matched with the blocking body in a blocking way is arranged in the fixed cylinder, and the blocking body can block the vent hole under the action of fluid pushing;

the coded lock comprises a shaft sleeve positioned in the extension part, a lock cylinder movably sleeved on the shaft sleeve, a first spring for resetting the lock cylinder, a lock plate group sleeved on the shaft sleeve and positioned in the lock cylinder and capable of being locked and matched with the lock cylinder to limit the lock cylinder to move axially, and a lock shaft inserted in the shaft sleeve and used for driving the lock plate group to rotate axially to release the lock plate group from being locked and matched with the lock cylinder;

the coded lock valve structure is provided with a code which can be read by a label reader-writer to obtain the coded lock valve structure, the gas cylinder information and the label of the client.

2. The combination lock valve structure of claim 1, wherein the combination lock further comprises a ball blocking frame disposed at an end of the lock cylinder near the vent hole for abutting against the blocking body to separate from the vent hole, and the blocking body is a spherical sealing ball.

3. The combination lock valve structure of claim 2, wherein the lock plate set comprises a first lock plate and a second lock plate movably sleeved on the shaft sleeve and axially spaced apart from each other; the inner wall of the lock cylinder is provided with a convex block strip extending along the axial direction of the lock cylinder, the outer edges of the first locking plate and the second locking plate are respectively provided with a first groove and a second groove for avoiding the convex block strip, and the convex block strip is provided with a first notch for avoiding the outer edge of the first locking plate; the lug strip movably extends into the second groove to form axial rotation positioning.

4. The valve structure of the combination lock according to claim 3, wherein an end of the lock shaft near the vent hole is connected with a driving plate for driving the locking plate set to rotate axially, a third groove for avoiding the protrusion strip is formed on an outer edge of the driving plate, and a second notch for avoiding an outer edge of the driving plate is formed on the protrusion strip.

5. The combination lock valve structure of claim 4, wherein the driving plate is coaxial with and spaced apart from the first locking plate and the second locking plate, and a fixing plate is disposed between the driving plate and the first locking plate and the second locking plate and sleeved on the shaft sleeve and axially and rotatably positioned with the shaft sleeve.

6. The combination lock valve arrangement of claim 4, wherein the driving tab has a driving abutment on a side facing the first locking tab, wherein the first locking tab has a first driven abutment extending outwardly from opposite sides of the first locking tab, wherein the second locking tab has a second driven abutment extending outwardly from opposite sides of the second locking tab, and wherein the driving abutment, the first driven abutment and the second driven abutment are in abutting engagement.

7. The combination lock valve arrangement of claim 6, wherein the first driven abutment comprises a first primary and secondary driven abutment located on opposite sides of the first locking plate, and the second driven abutment comprises a second primary and secondary driven abutment located on opposite sides of the second locking plate, the primary abutment being in abutting engagement with the first primary and secondary driven abutment, and the first secondary driven abutment being in abutting engagement with the second primary and secondary driven abutment.

8. A combination lock valve structure according to any one of claims 2 to 7, wherein a second spring is provided to the vent hole to urge the sealing ball up.

9. The combination lock valve arrangement of claim 1, wherein said blocking body is axially rotationally positionable in connection with said lock plate set and lockingly engageable with said lock cylinder, and wherein said blocking body is disengageable from said lock cylinder and movable toward said vent.

10. The combination lock valve arrangement of claim 9, wherein said vent is provided with a second spring for urging said blocking body.

11. The combination lock valve structure of claim 9, wherein the locking piece set comprises a first locking piece and a second locking piece movably sleeved on the shaft sleeve; the inner wall of the lock cylinder is provided with a convex block strip extending along the axial direction of the lock cylinder, the outer edge of the first locking plate is provided with a first convex block, and the convex block strip is provided with a first notch used for avoiding the first convex block; and an avoiding groove for avoiding the convex block strip is formed in the outer edge of the second locking plate, and the convex block strip movably extends into the avoiding groove to form axial rotation positioning.

12. The combination lock valve structure of claim 11, wherein the lock plate set further comprises an actuator plate connected to an end of the lock shaft near the vent hole for actuating the first lock plate and the second lock plate to rotate axially, and the blocking body is connected to the actuator plate in an axially rotating and positioning manner.

13. The combination lock valve structure of claim 12, wherein said blocking body includes a connecting portion axially and rotatably positioned in connection with said driving plate, a spherical head disposed at an end of said connecting portion adjacent to said vent hole for blocking said vent hole.

14. The combination lock valve structure of claim 13, wherein a second protrusion is disposed on an outer edge of the connecting portion, and a second notch for avoiding the second protrusion is disposed on the protrusion strip.

15. The combination lock valve structure of claim 14, wherein the driving plate is coaxial with and spaced apart from the first locking plate and the second locking plate, and a fixing plate is disposed between the driving plate and the first locking plate and the second locking plate and sleeved on the shaft sleeve and axially and rotatably positioned therewith.

16. The combination lock valve arrangement of claim 12, wherein the driving tab has a driving abutment on a side facing the first locking tab, wherein the first locking tab has a first driven abutment extending outwardly from opposite sides of the first locking tab, wherein the second locking tab has a second driven abutment extending outwardly from a side facing the first locking tab, and wherein the driving abutment, the first driven abutment and the second driven abutment are in abutting engagement.

17. The combination lock valve arrangement of claim 16, wherein the first driven abutment comprises a first main driven abutment and a first auxiliary driven abutment respectively located on opposite sides of the first locking plate, the main abutment being in abutting engagement with the first main driven abutment and the first auxiliary driven abutment being in abutting engagement with the second driven abutment.