CN211344185U

CN211344185U - Pneumatic gate valve capable of being opened and closed manually

Info

Publication number: CN211344185U
Application number: CN201922008492.XU
Authority: CN
Inventors: 蒋晓克; 苏为谈; 胡昱堂
Original assignee: Zhejiang Feibike Valve Co ltd
Current assignee: Zhejiang Feibike Valve Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-08-25
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a pneumatic gate valve that can manually open and close, including valve, setting cylinder and the auto-change over device in the valve top, realize pneumatics/manual switching through auto-change over device, the auto-change over device passes through the meshing and the separation of rolling disc control drive nut and piston rod to realize manual and pneumatic switching, the auto-change over device simple structure of this embodiment is compact, switches convenient and fast, and the holistic sealed effectual of gate valve.

Description

Pneumatic gate valve capable of being opened and closed manually

Technical Field

The utility model belongs to the technical field of the valve manufacturing technique and specifically relates to a but pneumatic gate valve of manual start-stop is related to.

Background

The pneumatic gate valve is a gate valve which is opened and closed by a pneumatic actuator and compressed air. The pneumatic actuating mechanism of the pneumatic gate valve is provided with a piston which can move up and down under the pushing of compressed air, the piston is connected with a valve rod of the gate valve, a spring is arranged above the piston, and the valve rod extends into the valve body and is associated with the gate plate; when compressed air enters the air chamber from the lower part of the piston, the piston is jacked up, the piston drives the valve rod to lift the flashboard to open the valve, and meanwhile, the spring is compressed; after deflation, under the action of a spring above the piston, the piston is pressed down to drive the valve rod to lower the flashboard and close the valve; of course, the valve can also be closed by introducing compressed air into the air chamber from above the piston to press the piston down.

Pneumatic gate valves generally require manual mechanisms because the valves must be opened and closed manually after the field-driven gas source has disappeared for a variety of reasons. At present, when a common pneumatic gate valve is switched between pneumatic operation and manual operation, the switching is usually completed by mounting and dismounting a hand wheel or switching is performed by a complex clutch device. Under the condition that a hand wheel needs to be installed and detached, when the pneumatic gate valve is under pneumatic control, the hand wheel does not need to be installed on the valve rod; when the gate valve needs to be manually operated, firstly, a bolt is dismounted to open an opening gland on a cylinder cover, a hand wheel is arranged on a valve rod, then, the opening gland is covered, the bolt is screwed on, and the hand wheel can be rotated to open and close the valve; when the pneumatic operation needs to be recovered, the operation is also required to be performed in a reverse direction according to the program, and the pneumatic installation mode of the valve is recovered. Therefore, the pneumatic gate valve is troublesome to switch manually, the switching operation time is long, the processes are multiple, the operation is troublesome, and particularly, unnecessary accidents are easily caused in the operation process under the condition that the valve needs to be opened and closed manually and quickly in an emergency.

Chinese patent application publication No. CN209196246U entitled "a pneumatic piston actuator with clutch-type manual mechanism for gate valve" with an authorization publication date of 2019, 08 and 02, discloses a pneumatic piston actuator with clutch-type manual mechanism for gate valve, which comprises a pneumatic actuator and a clutch-type manual operating mechanism, wherein the pneumatic actuator comprises a cylinder body, an upper end cover, a lower end cover, a piston and a piston rod, and the clutch-type manual operating mechanism comprises a bracket, a hand wheel, a lead screw nut transmission structure and a push rod; the support is fixed on the top of the upper end cover, the upper end of the piston rod penetrates through the piston, the lower end of the push rod penetrates through the upper end cover to be connected with the upper end of the piston rod, the lower end of the piston rod penetrates through the lower end cover, and the piston rod is doubled as a valve rod of the valve. The utility model discloses an adopt the separation and reunion of pinhole and round pin to realize the switching of manual pneumatics, its clutching mechanism component is in large quantity, and the structure is complicated, and needs to leave the removal space of piston rod in the mechanism, and the mechanism is bulky.

Disclosure of Invention

The utility model discloses an it is inconvenient to overcome pneumatic gate valve's manual opening and close among the prior art, and the shared space of current separation and reunion formula auto-change over device is big, and the not enough of structure complicacy provides a pneumatic gate valve that can manually open and close, can the manual/pneumatic mode of fast switch over, and simple structure is compact.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a pneumatic gate valve capable of being opened and closed manually comprises a valve, a cylinder and a switching device, wherein the cylinder and the switching device are arranged above the valve, a cylinder cover is arranged above the cylinder, a piston rod of the cylinder penetrates out of the top of the cylinder and extends into the cylinder cover, external threads are arranged on the upper portion of the piston rod, the switching device comprises a rotating sleeve arranged on the upper portion of the cylinder cover, a hand wheel (12) fixedly connected to the outer side of the rotating sleeve, a rotating sleeve cover fixedly arranged at the end portion of the rotating sleeve, a driving nut, a control panel and a rotating disc, the controlling disc, the rotating sleeve cover, the driving nut and the rotating sleeve are coaxially sleeved on the piston rod, the rotating sleeve is connected with the cylinder cover through a bearing, a lower mounting groove is arranged at the end portion of the rotating sleeve, an upper mounting groove is arranged on the rotating sleeve cover, the utility model discloses a hydraulic drive device, including drive nut, eccentric groove, connecting portion, carousel fixed mounting, the side of control panel is equipped with first constant head tank and second constant head tank, the drive nut inboard is equipped with the internal thread, and drive nut is split nut, and it includes two mutual disposition's half-nut, two half-nut on all be equipped with the control round pin, be equipped with two central symmetrical arrangement's eccentric groove on the control panel, the piston rod is kept away from near the piston rod other end to the one end of eccentric groove, eccentric groove be used for with the control round pin cooperation in order to control the interval between two half-nuts, drive nut with be equipped with the switching space between the installation cavity wall, rotating sleeve lid upper end is equipped with the opening, the upper end of control panel is passed the opening and is upwards extended and is formed connecting portion, carousel fixed mounting is in.

In the scheme, a hand wheel can drive a rotating sleeve to rotate, the rotating sleeve drives a rotating sleeve cover to rotate, a positioning pin is combined with a first positioning groove or a second positioning groove to drive a control panel to rotate, the control panel drives a driving nut to rotate through a control pin, the connecting part of the rotating panel and the control panel is fixedly connected, the control panel can be driven to rotate by adjusting the position of the rotating panel, the control panel rotates to switch the positioning groove into which the positioning pin is inserted, the control pin drives two half nuts of the driving nut to slide inside and outside an installation cavity due to relative rotation of the control panel, so that the driving nut is positioned on an external thread of a meshing piston rod or the distance between the two half nuts is larger than the outer diameter of the piston rod, the rotating angle of the control panel corresponding to the first positioning groove and the second positioning groove is the same as the rotating angle corresponding to two ends of an eccentric groove, at the moment, the driving nut is meshed with the piston rod, when the control pin is located at one end far away from the piston rod, the positioning pin is inserted into the second positioning groove, a gap exists between the driving nut and the piston rod, when the driving nut is meshed with the piston rod, the manual state is achieved, the hand wheel rotates to drive the piston rod to rotate through the rotating sleeve, the rotating sleeve cover, the positioning pin, the control panel and the driving nut, therefore, the piston rod is lifted manually, opening and closing of the manual control valve are achieved, when the gap exists between the driving nut and the piston rod, the piston rod moves up and down under the action of the air cylinder.

Preferably, the shape of the eccentric groove is an involute curve. The drive nut and the piston rod are gradually engaged or disengaged to reduce the impact during switching

Preferably, a boss is arranged at the position, where the piston rod penetrates out, of the top of the air cylinder, a corresponding groove is formed in the bottom of the air cylinder cover, and a sealing gasket is arranged between the boss and the air cylinder cover. The boss is arranged at the top of the cylinder, so that the cylinder cover can be conveniently installed, and the sealing gasket is arranged between the boss and the cylinder cover, so that the sealing performance of the cylinder at the extending part of the piston rod can be enhanced, the whole sealing performance of the cylinder is better, and the air is not easy to leak.

Preferably, the cylinder head is welded to the cylinder.

Preferably, the bottom of the cylinder is provided with a buffer. The lateral wall of piston can directly strike on the cylinder wall when the piston at the cylinder reciprocates, causes great vibration and noise, sets up the bolster in the bottom of cylinder inboard, contacts the bolster earlier when can making piston side wall downstream, reduces vibration and noise, simultaneously, preferably sets up the bolster in the handing-over department of cylinder bottom and inside wall, seals handing-over department, makes the holistic leakproofness of cylinder better.

Preferably, the side wall of the piston of the cylinder is provided with an air ring. The air tightness in the piston is better.

Preferably, a valve rod of the valve penetrates through a lower end cover of the cylinder and enters the cylinder to be fixedly connected with the piston, a lower sealing ring is arranged at the contact position of the valve rod and the lower end cover of the cylinder, and an upper sealing ring is arranged at the contact position of the piston rod and an upper end cover of the cylinder. The cylinder sets up upper seal ring and lower sealing ring respectively in piston rod extended position and valve rod extended position, guarantees the gas tightness of cylinder.

Preferably, a piston rod sleeve is arranged above the connecting part. The piston rod sleeve is used for accommodating the piston rod, and the piston rod is not exposed to the outside, so that dust is accumulated on the piston rod or the piston rod is rusted at an accelerated speed, and the use of the piston rod is not influenced.

Preferably, a rotating handle is arranged on the rotating disc, so that the rotating disc is convenient to push.

The utility model has the advantages that: (1) the manual or pneumatic mode can be conveniently and quickly switched; (2) the switching device has simple and compact structure; (3) the air tightness of the whole cylinder is good.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a switching device according to the present invention;

fig. 3 is a bottom view of a control panel according to the present invention;

fig. 4 is an enlarged view of a position a of the present invention.

In the figure: the switching device 1, the rotating sleeve 11, the hand wheel 12, the rotating sleeve cover 13, the driving nut 14, the control pin 141, the control disc 15, the eccentric groove 151, the connecting part 152, the first positioning groove 153, the second positioning groove 154, the rotating disc 16, the rotating handle 161, the mounting cavity 17, the switching gap 171, the positioning pin 172, the cylinder 2, the cylinder cover 21, the piston rod 22, the boss 23, the upper sealing ring 24, the lower sealing ring 25, the valve 3, the bearing 4, the piston sleeve 5, the sealing gasket 6, the buffer 7 and the air ring 8.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present solution, and are not construed as limiting the present solution.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "a plurality" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed or removable connections or integral parts, either mechanically or electrically, or in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art

The specific embodiment is as follows: as shown in fig. 1 to 3, a pneumatic gate valve capable of being opened and closed manually comprises a valve 3, a cylinder 2 arranged above the valve, and a switching device 1, wherein a cylinder cover 21 is arranged above the cylinder, a piston rod 22 of the cylinder penetrates out of the top of the cylinder and extends into the cylinder cover, an external thread 221 is arranged on the upper portion of the piston rod, the switching device comprises a rotating sleeve 11 arranged on the upper portion of the cylinder cover, a hand wheel 12 fixedly connected to the outer side of the rotating sleeve, a rotating sleeve cover 13 fixedly arranged on the end portion of the rotating sleeve, a driving nut 14, a control panel 15 and a rotating disc 16, the control panel, the rotating sleeve cover, the driving nut and the rotating sleeve are coaxially sleeved on the piston rod, the rotating sleeve is connected with the cylinder cover through a bearing 4, a lower mounting groove is arranged on the end portion of the rotating sleeve cover, an upper mounting groove is arranged on the rotating sleeve cover, and the upper mounting, the inner side of the driving nut is provided with internal threads, the driving nut is a split nut and comprises two half nuts which are oppositely arranged, the two half nuts are both provided with a control pin 141, two eccentric grooves 151 which are arranged in central symmetry are arranged on the control disc, one end of each eccentric groove is close to the piston rod, the other end of each eccentric groove is far away from the piston rod, the eccentric groove is used for matching with a control pin to control the distance between the two half nuts, a switching gap 171 is arranged between the driving nut and the wall of the mounting cavity, the upper end of the rotating sleeve cover is provided with an opening, the upper end of the control disc passes through the opening and extends upwards to form a connecting part 152, the rotating disc is fixedly arranged at the outer side of the connecting part, the side surface of the control disc is provided with a first positioning groove 153 and a second positioning groove 154, and a positioning pin 172 used for being combined with the first positioning groove or the second positioning groove is arranged on the side surface of the mounting cavity. A piston rod sleeve 5 is arranged above the connecting part; the bottom of the cylinder is provided with a buffer part 7; the side wall of the piston of the cylinder is provided with an air ring 8; the rotating disc is provided with a rotating handle.

In the embodiment, a support is arranged above the valve, a cylinder is arranged above the support, a valve rod of the valve penetrates through the support and extends into the cylinder from the lower end of the cylinder to be combined with the middle part of the lower end of a piston of the cylinder, two gas rings are arranged on the side wall of the piston and are used for forming sealing between the piston and the cylinder wall, a boss extending upwards is arranged in the middle of an upper end cover of the cylinder, a round hole penetrating up and down is formed in the middle of the boss, the upper end of the piston rod extends out of the cylinder from the round hole in the middle of the boss, external threads are arranged on the upper part of the piston rod, a cylinder sleeve is sleeved on the boss, the outer side wall of the cylinder sleeve is welded with the upper end cover of the cylinder, a rotating sleeve, a driving nut, a rotating sleeve cover and a control panel are sleeved on the piston rod from bottom to, the upper end of the rotating sleeve is larger than the lower end, the upper end of the rotating sleeve is inwards sunken to form a lower mounting groove, the rotating sleeve is integrally formed into a torch shape, the bottom of the rotating sleeve cover is upwards sunken to form an upper mounting groove, the rotating sleeve cover is fixed on the rotating sleeve through screws, the upper mounting groove is matched with the lower mounting groove to form a mounting cavity, the driving nut is positioned in the lower mounting groove, the inner side of the driving nut is provided with an internal thread matched with the external thread of the piston rod, the driving nut is a split nut and consists of two semicircular half nuts, the upper end surfaces of the two half nuts are respectively provided with a control pin, the control pins are embedded into the half nuts to be tightly matched with the half nuts, a control panel is arranged above the driving nut, the lower end surface of the control panel is provided with two eccentric grooves matched with the control pins, the control panel is arranged on, the side surface of the rotating sleeve cover is provided with a positioning pin which is used for being combined with the first positioning groove or the second positioning groove; the rotating handle arranged on the side surface of the rotating disc can drive the control disc to rotate, and operation is convenient.

The hand wheel can drive the rotating sleeve to rotate, the rotating sleeve drives the rotating sleeve cover to rotate, the positioning pin is combined with the first positioning groove or the second positioning groove to drive the control panel to rotate, the control panel drives the driving nut to rotate through the control pin, the connecting part of the rotating panel and the control panel is fixedly connected, the control panel can be driven to rotate by adjusting the position of the rotating panel, the control panel rotates to switch the positioning groove into which the positioning pin is inserted, the control pin drives the two half nuts of the driving nut to slide inside and outside the installation cavity due to the relative rotation of the control panel, so that the driving nut is positioned on the external thread of the meshing piston rod or the distance between the two half nuts is larger than the external diameter of the piston rod, the rotating angle of the control panel corresponding to the first positioning groove and the second positioning groove is the same as the rotating angle corresponding to the two ends of, at the moment, the driving nut is meshed with the piston rod, when the control pin is located at one end far away from the piston rod, the positioning pin is inserted into the second positioning groove, a gap exists between the driving nut and the piston rod, when the driving nut is meshed with the piston rod, the manual state is achieved, the hand wheel rotates to drive the piston rod to rotate through the rotating sleeve, the rotating sleeve cover, the positioning pin, the control panel and the driving nut, therefore, the piston rod is lifted manually, opening and closing of the manual control valve are achieved, when the gap exists between the driving nut and the piston rod, the piston rod moves up and down under the action of the air cylinder.

When the manual operation is switched in a pneumatic mode, the rotating disc is rotated through the rotating handle, the rotating disc drives the control panel to rotate due to the fact that the rotating disc is in key connection with the connecting portion of the control panel, the control panel rotates to enable the eccentric groove at the bottom of the control panel to rotate, the control panel rotates until the first positioning groove is aligned with the positioning pin, the positioning pin is inserted into the first positioning groove, in the process, the eccentric groove rotates to drive the two half nuts of the driving nut to move inwards through the control pin and to be gradually meshed with the piston rod, when the positioning pin is aligned with the first positioning groove, the driving nut is completely meshed with the piston rod, at the moment, the hand wheel is rotated and drives the rotating sleeve to rotate, the rotating sleeve drives the rotating sleeve cover to rotate, the positioning pin of the rotating sleeve cover is combined with the control panel, the control panel drives the driving nut, realize the manual start and stop of gate valve.

Further, a sealing gasket 6 is arranged between the boss and the cylinder cover. The boss is arranged at the top of the cylinder, so that the cylinder cover is convenient to mount, and the sealing gasket is arranged between the boss and the cylinder cover, so that the sealing performance of the cylinder at the extending part of the piston rod can be enhanced, the whole sealing performance of the cylinder is better, and the air is not easy to leak; the valve rod of the valve penetrates through the lower end cover of the cylinder to enter the cylinder and is fixedly connected with the piston, the lower sealing ring 25 is arranged at the contact position of the valve rod and the lower end cover of the cylinder, and the upper sealing ring 24 is arranged at the contact position of the piston rod and the upper end cover of the cylinder. The cylinder sets up upper seal ring and lower sealing ring respectively in piston rod extended position and valve rod extended position, guarantees the gas tightness of cylinder.

The embodiment has the advantages that the manual or pneumatic mode can be conveniently and quickly switched; the switching device has simple structure, and the whole structure of the gate valve is more compact; the air tightness of the whole cylinder is good.

Above, only the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims

1. A pneumatic gate valve capable of being opened and closed manually comprises a valve (3), a cylinder (2) and a switching device (1), wherein the cylinder (2) and the switching device (1) are arranged above the valve, a cylinder cover (21) is arranged above the cylinder, a piston rod (22) of the cylinder penetrates out of the top of the cylinder and extends into the cylinder cover, the pneumatic gate valve is characterized in that external threads (221) are arranged on the upper portion of the piston rod, the switching device comprises a rotating sleeve (11) arranged on the upper portion of the cylinder cover, a hand wheel (12) fixedly connected to the outer side of the rotating sleeve, a rotating sleeve cover (13) fixedly arranged at the end portion of the rotating sleeve, a driving nut (14), a control panel (15) and a rotating disc (16), the control panel, the rotating sleeve cover, the driving nut and the rotating sleeve are coaxially sleeved on the piston rod, the rotating sleeve is connected with the, the upper mounting groove and the lower mounting groove are combined to form a mounting cavity (17) for mounting a drive nut and a control panel, the inner side of the drive nut is provided with an internal thread, the drive nut is a split nut and comprises two half nuts which are oppositely arranged, two half nuts are respectively provided with a control pin (141), the control panel is provided with two eccentric grooves (151) which are symmetrically arranged in the center, one end of each eccentric groove is close to the other end of the piston rod and is far away from the piston rod, the eccentric grooves are used for being matched with the control pins to control the distance between the two half nuts, a switching gap (171) is arranged between the drive nut and the mounting cavity wall, the upper end of the rotating sleeve cover is provided with an opening, the upper end of the control panel penetrates through the opening to extend upwards to form a connecting part (152), the rotating disc is fixedly mounted on the outer side of the connecting part, and, and a positioning pin (172) used for being combined with the first positioning groove or the second positioning groove is arranged on the side surface of the mounting cavity.

2. The pneumatic gate valve capable of being opened and closed manually according to claim 1, wherein the shape of the eccentric groove is an involute curve.

3. The pneumatic gate valve capable of being opened and closed manually according to claim 1, wherein a boss (23) is arranged at the position where the piston rod penetrates out of the top of the cylinder, a corresponding groove is formed at the bottom of the cylinder cover, and a sealing gasket (6) is arranged between the boss and the cylinder cover.

4. A manually operable pneumatic gate valve according to claim 3, wherein said cylinder head is welded to said cylinder.

5. A manually operable pneumatic gate valve according to claim 1, wherein a buffer member (7) is provided at the bottom of the cylinder.

6. A manually operable pneumatic gate valve according to claim 1, wherein the side wall of the piston of the cylinder is provided with a gas ring (8).

7. The pneumatic gate valve capable of being opened and closed manually according to claim 1, wherein a valve rod of the valve penetrates through a lower end cover of the cylinder and enters the cylinder to be fixedly connected with the piston, a lower sealing ring (25) is arranged at the contact position of the valve rod and the lower end cover of the cylinder, and an upper sealing ring (24) is arranged at the contact position of the piston rod and the upper end cover of the cylinder.

8. A manually openable and closable pneumatic gate valve according to any one of claims 1 to 7, wherein a piston rod sleeve (5) is provided above the connecting portion.

9. A manually operable pneumatic gate valve according to any one of claims 1 to 7, wherein the rotatable disc is provided with a rotatable handle (161).