CN113483257A - Safe filling gun - Google Patents

Abstract

The invention discloses a safe filling gun, which adopts a piston power running mechanism with double power cylinders and three chambers to drive an inner gun tube and an outer gun tube to do relative reciprocating motion, executes gun feeding and gun withdrawing operations of the filling gun in a most reasonable pneumatic action mode, further, is matched with a clamping mechanism and a pneumatic pressure adjusting hole, ensures that a clamping jaw of the clamping mechanism is stably locked with a gun head of the inner gun tube in the gun feeding action process of the filling gun through a power source pressure adjusting control valve and a locking structure of the clamping mechanism, ensures that the safety accident of gun collapse does not occur in the gun feeding and withdrawing processes of the filling gun, and improves the continuous filling capacity of a power cylinder.

Description

Safe filling gun

Technical Field

The invention relates to a safe filling gun, and relates to the technical field of low-temperature medium conveying.

Background

The filling gun is one of the core parts of the filling system, is a carrier for realizing reliable connection of a liquid filling machine, a vehicle-mounted gun seat and a steel cylinder, is used for controlling the flow of a medium to the vehicle-mounted steel cylinder, and when the filling gun is connected, a one-way valve core of the filling gun and a one-way valve core of the vehicle-mounted gun seat are mutually jacked open, so that the medium can be ensured to smoothly circulate; when the filling gun is separated from the gun head seat, the respective one-way valve cores are automatically reset (the valve core sealing gaskets automatically press the corresponding inner wall surfaces) by the action of medium pressure and spring force to seal and ensure no leakage. Before the filling gun is separated from the gun head seat, residual pressure between the valve cores of the filling gun and the gun head seat is discharged through a pressure relief hole of the gun head seat. The filling gun is one of the most frequently operated and most prone to failure devices of the filling apparatus.

At present, in the prior art, the operations of filling and pressure relief are mostly realized in a manual mode, and when filling is carried out for a long time, high requirements are put on the physical strength of operators, so that the experience of the operators is poor; and on the control of the process of advancing and retreating the pneumatic liquid adding gun, the advancing and retreating switch of the barrel of the existing pneumatic liquid adding gun and the claw opening switch of the claw are integrated together, so that the claw is opened without completing the pressure relief due to the easy occurrence of misoperation, and potential safety hazards are brought. Meanwhile, after the pressure of an air source is suddenly lost, the existing filling gun is likely to collapse, and the personnel safety on site is threatened. Furthermore, the power source that current pneumatic liquid feeding rifle provided is weak, and weak to power source control power, can't control effectively that the piston rod in the interior barrel casing makes complete reciprocating motion, under this trend, causes too much energy resource consumption and waste easily, simultaneously because advance the rifle and move back the rifle and can't reach the primary point, the piston rod makes irregular motion at the interior barrel casing, loses the control to pneumatic liquid feeding rifle easily, causes the incident.

The utility model patent application with application number CN201520547610.3 discloses a liquid feeding gun, wherein an inner gun head sleeve capable of sliding relatively is arranged in an outer gun head sleeve, a one-way valve core assembly is matched in the inner gun head sleeve, the inner gun head sleeve is fixed with a connecting plate through a short shaft pin, the connecting plate is supported on the inner wall step of the outer gun head sleeve through a compression spring and a connecting rubber sleeve sleeved on the outer wall of the inner gun head sleeve, and a clamping mechanism capable of being matched with the inner gun head sleeve is arranged at the front end of the outer gun head sleeve; the rear end of the outer gun head sleeve is provided with a supporting plate and two handle mechanisms which are symmetrically arranged, the two handle mechanisms simultaneously act on the connecting plate through rotation, and the matching between the inner gun head sleeve and the clamping mechanism of the outer gun head sleeve is controlled through the extension and retraction of the spring. The utility model discloses cancelled the partial structure of lead screw, need not to adjust the relative position size of the rifle body again, avoided being the unexpected emergence that the pressure effect collapses the rifle (not the pressure release rifle is forced to withdraw from) and form the potential safety hazard. However, the locking performance of the three-head claw is unstable, the three-head claw is controlled to be occluded through the external handle, the operation process is complex and laborious, the clamping angle is manually set, the three-head claw still cannot stably lock the liquid feeding gun head in the gun feeding process, the falling phenomenon possibly occurs, the three-head claw cannot be controlled to be opened and closed through manual intervention under emergency, the advancing and retreating switch and the claw opening switch of the claw are integrated, misoperation is easy to occur, the pressure releasing claw is not opened, and potential safety hazards are brought. The air pressure difference of the gun barrel in the inner gun barrel cannot be effectively controlled and adjusted, so that energy waste and excessive loss of instruments are easily caused, the service life of the pneumatic liquid adding gun is influenced, and the potential safety hazard of gun collapse is brought; further, in this application, the power action mode efficiency in the liquid feeding gun is lower, advance the rifle and move back rifle power supply mode comparatively complicated, advance the rifle in-process and need great power supply, cause the unnecessary energy extravagant, move back the rifle in-process, the piston rod can't effectively return the initial position, the barrel can't keep static relatively, makes reciprocating motion under atmospheric pressure and compression spring's effect easily, takes place the potential safety hazard that collapses the rifle easily at artifical in-process.

Disclosure of Invention

The invention aims to solve the problems, and provides a safe filling gun, which adopts a piston power running mechanism with double cylinders and three chambers, drives an inner gun tube and an outer gun tube to do relative reciprocating motion through compression springs arranged inside and outside, executes gun feeding and gun withdrawing operations of the filling gun in a most reasonable pneumatic action mode, further, ensures that a clamping structure clamping jaw and an inner gun tube gun head are stably locked in the gun feeding and gun withdrawing process of the filling gun through a power source pressure adjusting control valve and a locking structure of the clamping mechanism by matching with the arrangement of a clamping mechanism and a pneumatic adjusting hole, ensures that the safety accident of gun collapse does not occur in the gun feeding and gun withdrawing process of the filling gun, and improves the continuous filling capacity of a power cylinder.

The technical scheme adopted by the invention is as follows:

the invention discloses a safe filling gun, which comprises an inner gun barrel, an outer gun barrel, a clamping mechanism, a power chamber and a handle mechanism, wherein the inner gun barrel is arranged in the outer gun barrel and slides relatively in the outer gun barrel under the telescopic action of a first compression spring, the end part of the outer gun barrel is of an annular structure, and is connected with the power chamber at the rear end of the filling gun through a plurality of connecting pipes.

Furthermore, the lower edge surface of the clamping jaw closed clamping jaw is parallel to the upper edge surface of the supporting sleeve, the clamping jaw (the rear edge wedge angle is matched with the front edge wedge angle of the supporting sleeve, and the rear edge wedge angle of the clamping jaw is in staggered butt joint with the front edge wedge angle of the supporting sleeve to keep stability.

Furthermore, the hinge cover is provided with a vertical screw to vertically and fixedly connect the hinge cover and the fixing ring, and the lower edge surface of the front end of the hinge cover is attached to the upper edge surface of the clamping jaw in parallel.

Furthermore, the hinge cover is provided with a first screw hole movably connected with the hinge cover and a second screw hole movably connected with the outer barrel, the first screw hole and the second screw hole are vertically arranged, and the first screw hole and the second screw hole are vertically eccentric by 0.5-2 mm.

Furthermore, the power cavity comprises a double-power cylinder, a power cylinder partition plate is arranged in the power cylinder, the power cavity is partitioned into a first cavity, a second cavity and a third cavity, a reversing valve is arranged on the power cavity, an air inlet joint is arranged on one side of the reversing valve, the air inlet joint is connected with the reversing valve to form a one-way air inlet channel, the reversing valve is connected with the first cavity through a first air pipe, and the reversing valve is connected with the second cavity and the third cavity through a second air pipe.

Furthermore, a first piston and a second piston are arranged in the power cavity, the first piston and the second piston drive a piston rod to reciprocate in the power cavity, the rear end of the piston rod is connected with the first piston, and the first piston and the second piston drive the piston rod to move forwards to abut against the rear end of the inner gun barrel; the piston rod movable chamber is axially provided with a limiting sleeve which is abutted against a notch of the power chamber, the piston rod movable chamber is stressed to displace towards the inner gun barrel, and the limiting sleeve is abutted against a limiting plate at the rear end of the inner gun barrel to form a vertical limiting relation.

Furthermore, a control valve is arranged on the power cavity and connected with the control clamping mechanism, the control valve comprises a valve core movable cavity and a control button, the control button is inserted into the valve core movable cavity after the control valve is closed, a third air pipe and a fourth air pipe are arranged at an air vent of the valve core movable cavity, the third air pipe is connected with the first cavity, and the fourth air pipe is connected with the second cavity and the third cavity; the inner part of the control button inserted into the valve core movable cavity is of a columnar long rod structure, a plurality of sealing rings are arranged on the columnar long rod structure at intervals, the control button is inserted into the valve core movable cavity, the sealing rings block a connecting channel of a third air pipe and a fourth air pipe in the valve core movable cavity, the outer surface of the valve core movable cavity is provided with a drainage hole, and the drainage hole is connected with a groove-shaped drainage channel in the valve core movable cavity.

Furthermore, the inner gun tube comprises an inner gun tube gun head, an inner gun tube gun body and a one-way valve core, the front end of the inner gun tube gun body extrudes the one-way valve core through a second compression spring to seal with the inner gun tube gun head, and the rear end of the inner gun tube gun body is connected with the movable cavity of the piston rod to form a transversely connected power transmission structure; the connecting pipe is connected with a power cavity notch at the rear end of the filling gun, a plurality of steam ports are arranged on the inner ring of the power cavity notch, and a two-position four-way valve is arranged at each steam port and is connected with a third cavity and the connecting pipe.

Further, the handle mechanism comprises a first handle and a second handle, the first handle is arranged on the rear seat of the power cavity, the second handle is arranged on the outer barrel body, and the first handle and the second handle are connected and fixed to be perpendicular to each other and arranged at an angle.

Furthermore, a filling gun connecting port is arranged on the outer gun barrel body, and the filling gun connecting port is a bending space of 45-60 degrees to form a filling gun drainage channel.

The invention has the following technical effects:

the invention provides a safe filling gun of a filling gun, which effectively solves the problems that the filling and pressure relief operation is realized in a manual mode in the prior art, and the effect that a forward and backward switch of a gun barrel of the filling gun and a claw opening switch of a claw are integrated together and perform safe filling action is effectively realized.

The method comprises the following specific steps:

1. the gun barrel clamping device comprises a clamping mechanism, wherein the clamping mechanism comprises clamping jaws, a hinge cover and a fixing ring, the clamping mechanism controls the clamping jaws to perform the actions of meshing and loosening the clamping jaws through the action of a first compression spring, and the relative displacement of an inner gun barrel and an outer gun barrel is formed through the telescopic action of an inner gun barrel and a second compression spring and the matching of the clamping mechanism, so that the relative displacement of the inner gun barrel and the outer gun barrel is completed in a more convenient and faster mode, and the gun feeding and withdrawing processes are easier to control.

2. The clamping mechanism also comprises a support sleeve and an inner gun-shaped notch, wherein the support sleeve is abutted against the inner gun-shaped notch, and the support sleeve is stably limited by the support sleeve from being supported on the support sleeve and the inner gun-shaped notch to generate relative displacement when the clamping jaws are meshed with the inner gun-barrel head through the connection and the coincidence of the support sleeve and the inner gun-shaped notch, so that the meshing stability of the clamping jaws in the gun feeding process is ensured.

3. The rear edge of the clamping jaw on the clamping mechanism and the front edge wedge opening of the support sleeve form a fit angle, the rear edge of the clamping jaw and the wedge opening surface of the front edge of the support sleeve are in butt joint and are kept stable in the gun feeding process, relative displacement can be generated due to the fact that the wedge opening angles of the rear edge of the clamping jaw and the front edge of the support sleeve are the same in the gun withdrawing process, furthermore, a vertical screw is arranged on the hinge cover to vertically and fixedly connect the hinge cover and the fixing ring to limit the clamping jaw to vertically displace, and the force for rotating the clamping jaw is generated through the eccentric distance between the first bolt and the second bolt, so that the opening and closing state of the clamping jaw can be controlled in the gun withdrawing process.

4. According to the invention, the control valve for controlling the clamping mechanism is arranged below the power cavity, the control valve is connected with different cavity structures in the power cavity through the third air pipe and the fourth air pipe, the air pressure difference in the power cavity is adjusted, and the clamping jaws of the clamping mechanism are further controlled to be in a stable occlusion state through the arrangement of the sealing ring and the drainage hole, so that the gun collapse condition caused by the fact that the clamping jaws are not firmly occluded is effectively avoided.

5. The filling gun adopts double cylinders as a power running mechanism, the double cylinders are divided into a three-cavity structure through cylinder partitions, the double cylinders are respectively connected with a reversing valve one-way air inlet structure connected with a power cavity of the filling gun through a first air pipe and a second air pipe, a control channel for air flow direction is formed for the double cylinders, and further, the pressure difference of air in the two cylinders is controlled through the three-cavity structure so as to more accurately drive a piston power mechanism in an inner gun tube to do reciprocating motion

6. According to the invention, the water vapor port and the two-position four-way valve are arranged on the third chamber, the water vapor port is matched with the air guide hole on the control valve, gas is discharged from the water vapor port in the gun feeding process, a pressure difference is formed, so that the piston rod moves towards the gun feeding direction, gas is filled from the water vapor port in the gun withdrawing process of the filling gun, at the moment, the pressure of the second cylinder is greater than that of the first cylinder, and the piston rod is assisted to move back; furthermore, through the arrangement of the two air holes, the damage to equipment caused by excessive residual low-temperature medium in the filling gun is avoided, a good heat insulation design effect is achieved, and the continuous filling capacity of the air cylinder is improved.

7. According to the invention, the rear end of the inner gun barrel body is abutted against the limiting plate at the rear end of the inner gun barrel which is perpendicular to the limiting sleeve through the limiting sleeve, residual gas possibly existing in the air cylinder in the gun withdrawing process cannot be completely discharged, and the gas forms pressure difference in the cavity to cause that the gun barrel cannot be completely reset, and through the design of the limiting sleeve mechanism, force action is provided for the last distance of backward displacement of the piston rod, so that the filling gun finishes the reset work.

Drawings

FIG. 1 is a front view of a fill gun of the present invention;

FIG. 2 is a cross-sectional view C-C of a front view of the fill gun of the present invention;

FIG. 3 is a side view of the fill gun of the present invention;

FIG. 4 is a side view, E-E, in cross-section of the fill gun of the present invention;

FIG. 5 is a top view of the fill gun of the present invention.

The labels in the figure are: 1-an outer barrel, 2-an inner barrel, 201-an inner barrel head, 202-an inner barrel body, 203-a one-way valve core, 204-a limiting plate, 204-an inner barrel gun-shaped notch, 3-a clamping structure, 301-a clamping jaw, 302-a hinge cover, 303-a fixing ring, 304-a supporting sleeve, 305-a first screw hole, 306-a second screw hole, 4-a power chamber, 401-a first chamber, 402-a second chamber, 403-a third chamber, 404-a power cylinder partition, 405-a first air pipe, 406-a second air pipe, 407-a first movable rod, 408-a second piston, 409-a piston rod, 410-a piston rod movable chamber, 411-a power chamber notch, 5-a handle mechanism, 501-a first handle, 502-a second handle, 6-a ventilation reversing valve, 601-an air inlet joint, 7-a connecting pipe, 8-a control valve, 801-a valve core movable chamber, 802-a control button, 803-a third air pipe, 804-a fourth air pipe, 805-a sealing ring, 806-a drainage hole, 807-a groove-shaped drainage channel, 9-a first compression spring, 10-a second compression spring, 11-a steam port, 12-a limiting sleeve and 13-a filling gun connecting port.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

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.

In the embodiment, the adopted data is a preferred scheme, but is not used for limiting the invention;

the safe filling action of the filling gun can be realized through various power action modes, in the embodiment, low-temperature gas is used as a conveying power source to illustrate the embodiment, and in the embodiment, the pressure of a driving gas source is 0.3-0.8 MPa.

As shown in fig. 1-5, the present embodiment provides a safe filling fill gun comprising an inner barrel, an outer barrel, a clamping mechanism, a power chamber, and a handle mechanism, the inner barrel disposed within the outer barrel, the filling gun can slide relatively in an outer gun tube through the telescopic action of a first compression spring, the end part of the outer gun tube is of an annular structure, and preferably, the filling gun is connected with a power chamber at the rear end of the filling gun through four glass steel columns in the embodiment, a control valve is arranged below the power chamber and connected with the clamping mechanism to control the locking position relationship, the clamping mechanism comprises a clamping jaw, a hinge cover and a fixing ring, the fixing ring annularly wraps the inner barrel and abuts against the first compression spring, the front end of the fixing ring is provided with a support sleeve which is clamped on the gun-shaped notch of the inner gun barrel, and the support sleeve and the gun-shaped notch of the inner gun barrel are connected with a locking clamping jaw to enable the clamping jaw to be occluded with the inner gun barrel head to be incapable of falling off. Further, in this embodiment, the lower edge surface of the clamping jaw in the closed state is parallel to the upper edge surface of the supporting sleeve, the rear edge wedge angle of the clamping jaw is matched with the front edge wedge angle of the supporting sleeve, and the rear edge wedge angle of the clamping jaw is alternatively abutted against the front edge wedge of the supporting sleeve to be kept stable.

In this embodiment, the supporting sleeve is under the mutual interlock of support cover and interior gun tube gun-shaped notch butt, the filling gun is in into the rifle state, because the clamping jaw can only take place the rotatory displacement angle in two under the effect of hinge cover and solid fixed ring control, gun tube rifle head in the clamping jaw front end interlock this moment, the clamping jaw rear end is through supporting the interlock structure that cover and interior gun tube gun-shaped notch formed, is supporting the cover restriction through supporting the interlock structure forms fixed knot to restriction clamping jaw rear end takes place rotatoryly, makes the clamping jaw keep the closure state not take place the interlock insecure at whole rifle in-process of advancing, avoids causing the accident that collapses the rifle.

Further, the hinge cover is provided with a vertical screw to fixedly connect the hinge cover and the clamping jaw fixing ring vertically, and the lower edge face of the front end of the hinge cover is attached to the upper edge face of the clamping jaw in parallel. Preferably, in this embodiment, the hinge cover is in a movable hinge connection in the structure, the hinge cover and the fixed ring which is fixedly connected are vertically fixed through a vertical screw, and the moving direction of the hinge cover is limited.

Furthermore, the hinge cover is provided with a first screw hole and a clamping jaw which are movably connected, and is also provided with a second screw hole and an outer gun tube which are movably connected, the first screw hole and the second screw hole are vertically arranged, and the first screw hole and the second screw hole are vertically eccentric by 0.5mm-2 mm. Preferably, in the embodiment, the first screw hole and the second screw hole are vertically eccentric by 0.08mm, in order to further control the clamping jaw to rotate on the limiting plane of the clamping mechanism, a connecting screw hole of the clamping jaw and the hinge cover is arranged, the clamping jaw is limited to rotate in a safe range by the upper edge face of the hinge cover, and further, a rotating moment can be generated through the eccentric distance between the lower first screw hole and the second screw hole, so that the clamping jaw is enabled to rotate in an offset manner.

In this embodiment, the wedge angle of the rear edge of the clamping jaw is matched with the wedge angle of the front edge of the support sleeve, and the wedge angle is further adjusted through the following test, so as to better control the stable state of the clamping jaw in the gun feeding process. The present embodiment is described by taking the maximum driving air source pressure of 0.8Mpa as the test data, and the test data is as follows:

(1) when the wedge angle of the rear edge of the clamping jaw and the wedge angle of the front edge of the supporting sleeve are 30 degrees, the clamping jaw needs to deviate by a large angle to form a locking structure due to the fact that the wedge angle is too small, the clamping jaw is difficult to close, and a stable locking form in the gun feeding process cannot be effectively formed.

(2) When the wedge angle of the rear edge of the clamping jaw and the wedge angle of the front edge of the supporting sleeve are 45 degrees, the wedge angles of the clamping jaw and the front edge of the supporting sleeve are engaged and can smoothly generate relative sliding, and the wedge openings are in an occlusion fastening state under the supporting action of the supporting sleeve, and at the moment, the clamping jaw effectively forms a stable locking shape in the gun feeding process.

(3) When the wedge angle of the rear edge of the clamping jaw and the wedge angle of the front edge of the supporting sleeve are 60 degrees, the clamping jaw and the supporting sleeve are in a clamping state at the wedge position due to the overlarge wedge angle, normal gun feeding and gun withdrawing operations cannot be carried out, and the using requirements cannot be met.

In summary, when the wedge angle of the rear edge of the clamping jaw and the wedge angle of the front edge of the supporting sleeve are 45 degrees, the clamping jaw is in the most stable occlusion state.

In the embodiment, the power cavity comprises a left double-power cylinder and a right double-power cylinder, a power cylinder partition plate is arranged in the left power cylinder to partition the power cavity into a first cavity, a second cavity and a third cavity, a ventilation reversing valve is arranged above the power cavity, an air inlet joint is arranged on one side of the ventilation reversing valve, the air inlet joint is connected with the ventilation reversing valve to form a one-way air inlet channel, the ventilation reversing valve is connected with the first cavity through a first air pipe, and the ventilation reversing valve is connected with the second cavity and the third cavity through a second air pipe; further, in the process that the inner gun tube and the outer gun tube move forward relative to each other to do gun feeding action, gas enters the first cavity from the first gas tube through adjusting the hole passage of the ventilation reversing valve, gas in the second cavity and the third cavity is discharged out of the power cavity from the second gas tube, the pressure in the right cylinder is higher than the pressure in the left cylinder, and the first piston and the second piston are acted by the right cylinder force to drive the piston rod to move towards the inner gun tube in the piston rod movable cavity so as to finish the gun feeding operation of the filling gun; at the gun action in-process is moved back in the relative reverse displacement of gun barrel and outer gun tube, through the connected mode of adjusting the switching-over valve pore of taking a breath of ventilating, gaseous second trachea entering second cavity and third cavity are indoor from the second trachea, gaseous first trachea discharge power cavity in the first cavity, the pressure in the cylinder of left side this moment is greater than the pressure in the cylinder of right side, first piston and second piston receive the effect of left side cylinder force, drive the piston rod and move to reset to keeping away from interior gun tube direction in piston rod activity cavity, accomplish the operation of filling gun and moving back the rifle.

In the embodiment, a first piston and a second piston are arranged in the power chamber, the first piston and the second piston push a piston rod to reciprocate in a piston rod movable chamber in the power chamber, the rear end of the piston rod abuts against the first piston, and the front end of the piston rod moves forwards and abuts against the rear end of an inner gun barrel; piston rod activity cavity circumference is provided with spacing sleeve butt on the power cavity notch, and piston rod activity cavity drives the inside barrel displacement of spacing sleeve, the spacing relation of perpendicular spacing is formed on the limiting plate of barrel rear end including the spacing sleeve butt. Preferably, in this embodiment, the piston rod is designed to have a hollow structure, and the piston rod designed to have a hollow rod-shaped structure can better dissipate heat, so as to reduce the need of more low-temperature gas acting on the piston mechanism for cooling, thereby achieving the purpose of saving energy; further, because the residual low-temperature gas possibly exists in the cylinder on the right side in the gun returning process and can not be completely removed, the low-temperature gas forms pressure difference in the power cavity to cause the gun barrel to be completely reset, and the effect of force is provided for the piston column to be far away from the displacement of the inner gun tube direction through the design of the limiting sleeve mechanism, so that the filling gun completes the reset work, and the potential safety hazard that the gun body falls off due to the fact that the filling gun cannot be reset and the operation is influenced is avoided.

In this embodiment, a control valve is arranged below the power chamber, the control valve is connected with a control clamping mechanism to control the locking position relationship, the control valve comprises a valve core movable chamber and a control button, the control button is completely inserted into the valve core movable chamber after the control valve is closed, a third air pipe and a fourth air pipe are arranged at the upper end of the valve core movable chamber, the third air pipe is connected with the first chamber, and the fourth air pipe is connected with the second chamber and the third chamber; the inner part of the control button inserted into the valve core movable cavity is of a columnar long rod structure, a plurality of sealing rings are arranged on the columnar long rod structure at intervals, the control button is completely inserted into the valve core movable cavity, the sealing rings block a connecting channel of a third air pipe and a fourth air pipe in the valve core movable cavity, a drainage hole is formed in the outer surface of the valve core movable cavity, and the drainage hole is connected with a groove-shaped drainage channel in the valve core movable cavity.

In the embodiment, in the process of normally transporting the gun, gas in the first cavity can enter the valve core movable cavity through the third gas pipe, low-pressure gas enters the second cavity and the third cavity through the connection of the valve core movable cavity and the fourth gas pipe, and the control button can be pulled and pulled randomly under the action of gas pressure because flowing gas exists in the valve core movable cavity at the moment; when the control button is completely inserted into the valve core movable cavity, the sealing ring is positioned on a channel connected with the third air pipe and the fourth air pipe at the moment, the connecting channel of the third air pipe and the fourth air pipe in the valve core movable cavity is blocked, the air in the valve core movable cavity cannot normally circulate at the moment, the control button is always in a completely closed state, and the control valve controls the clamping jaw to fasten the head of the inner gun pipe at the moment, so that the potential safety hazard of gun collapse caused by the falling of the clamping jaw in the gun feeding process is avoided; furthermore, the outer surface of the valve core movable cavity is provided with a drainage hole, the drainage hole is connected with a groove-shaped drainage channel in the valve core movable cavity, after the control button is completely inserted into the valve core movable cavity, residual gas in the valve core movable cavity and in the cylinder on the left side can be discharged through a water vapor port arranged on the third cavity, and the residual gas can be guided to be discharged out of the cavity through the drainage hole arranged on the outer surface of the valve core movable cavity through the groove-shaped drainage channel in the valve core movable cavity.

In the embodiment, the inner gun tube comprises an inner gun tube gun head and an inner gun tube gun body, the front end of the inner gun tube gun body ensures that the one-way valve core and the inner gun tube gun head are sealed through the telescopic action of a second compression spring, and the rear end of the inner gun tube gun body is connected with a movable cavity of a piston rod to form a transversely connected power transmission structure; the glass steel column is connected with a power cavity notch at the rear end of the filling gun, a plurality of water vapor ports are arranged on the inner ring of the power cavity notch, and a two-position four-way valve is arranged at each water vapor port and is connected with a third cavity and the glass steel column. Further, through the structure setting, palirrhea low temperature gas or condensate liquid can pass through steam mouth discharge cavity in the third cavity or in the glass steel post, and it has effectively avoided the low pressure filling material that can't effectively utilize in the cavity to damage filling gun inner structure, influences filling gun life.

In this embodiment, the handle mechanism includes a first handle and a second handle, the first handle is disposed on the rear seat of the power chamber, the second handle is disposed on the outer barrel body, and the first handle and the second handle are connected and fixed to be disposed at a perpendicular angle. Preferably, the setting of this embodiment through the first handle of vertical arrangement and second handle structure forms the protection architecture of putting the individuality, improves control structure's stability, avoids operating personnel unilateral control handle to cause the incident.

In this embodiment, a filling gun connection port is arranged on the outer barrel body, and the filling gun connection port is a 45-60 ° bending space to form a filling gun drainage channel. Preferably, the structural design of 45-degree elbow is adopted in the embodiment, so that the operator has the most reasonable operation space when holding the filling gun.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. The filling gun for safe filling comprises an inner gun tube (2), an outer gun tube (1), a clamping mechanism (3), a power chamber (4) and a handle mechanism (5), wherein the inner gun tube (2) is arranged in the outer gun tube (1), and slides relatively in the outer gun tube (1) under the telescopic action of a first compression spring (9), the end part of the outer gun tube (1) is of an annular structure and is connected with the power chamber (4) at the rear end of the filling gun through a plurality of connecting pipes (7), the filling gun is characterized in that the power chamber (4) is provided with a control valve (8), the control valve (8) is connected with the clamping mechanism (3), the clamping mechanism (3) comprises a clamping jaw (301), a hinge cover (302) and a fixing ring (303), the fixing ring (303) annularly wraps the inner gun tube (2) and abuts against the first compression spring (9), and a support sleeve (304) is arranged on the fixing ring (303), the fixing ring (303) slides and moves in the gun, and the support sleeve (304) is clamped on the gun-shaped notch (204) of the inner gun barrel to fix the position of the clamping jaw (301).

2. The safety filling fill gun according to claim 1, characterized in that the lower edge face of the closing clamping jaw (301) of the clamping jaw (301) is parallel to the upper edge face of the support sleeve (304), the wedge angle of the rear edge of the clamping jaw (301) is matched with the wedge angle of the front edge of the support sleeve (304), and the wedge angle of the rear edge of the clamping jaw (301) and the wedge angle of the front edge of the support sleeve (304) are in staggered abutting joint and are kept stable.

3. The filling gun for safe filling according to claim 2, characterized in that the hinge cover (302) is provided with vertical screws for vertically and fixedly connecting the hinge cover (302) and the fixing ring (303), and the lower edge surface of the front end of the hinge cover (302) is attached to the upper edge surface of the clamping jaw (301) in parallel.

4. Filling gun for safe filling according to claim 3, characterized in that the hinged cover (302) is provided with a first threaded hole (305) for the movable connection with the hinged cover (302) and a second threaded hole (306) for the movable connection with the outer barrel (1), the first threaded hole (305) and the second threaded hole (306) being vertically arranged, the first threaded hole (305) and the second threaded hole (306) being vertically eccentric by 0.5mm-2 mm.

5. The filling gun according to claim 1 or 4, characterized in that the power chamber (4) comprises a double power cylinder, a power cylinder partition plate (404) is arranged in the power cylinder to separate the power chamber (4) into a first chamber (401), a second chamber (402) and a third chamber (403), a reversing valve (6) is arranged on the power chamber (4), an air inlet joint (601) is arranged on one side of the reversing valve (6), the air inlet joint (601) is connected with the reversing valve (6) to form a one-way air inlet channel, the reversing valve (6) is connected with the first chamber (401) through a first air pipe (405), and the reversing valve (6) is connected with the second chamber (402) and the third chamber (403) through a second air pipe (406).

6. The filling gun safety filling power chamber according to claim 5, characterized in that a first piston (407) and a second piston (408) are arranged in the power chamber (4), the first piston (407) and the second piston (408) drive a piston rod (409) to reciprocate in the power chamber (4), the rear end of the piston rod (409) is connected with the first piston (407), and the first piston (407) and the second piston (408) drive the piston rod (409) to move forwards to abut against the rear end of the inner barrel (2); piston rod activity chamber (410) axial is provided with spacing sleeve (12) butt on power chamber notch (411), and piston rod activity chamber (410) atress is to interior barrel (2) displacement, and spacing sleeve (12) butt forms perpendicular spacing relation on limiting plate (204) at interior barrel (2) rear end.

7. The filling gun safe filling power chamber according to claim 6, characterized in that a control valve (8) is arranged on the power chamber (4), the control valve (8) is connected with the control clamping mechanism (3), the control valve (8) comprises a valve core movable chamber (801) and a control button (802), the control button (802) is inserted into the valve core movable chamber (801) after the control valve (8) is closed, a third air pipe (803) and a fourth air pipe (804) are arranged at a vent of the valve core movable chamber (801), the third air pipe (803) is connected with the first chamber (401), and the fourth air pipe (804) is connected with the second chamber (402) and the third chamber (403); the inner part of the control button (802) inserted into the valve core movable cavity (801) is of a columnar long rod structure, a plurality of sealing rings (805) are arranged on the columnar long rod structure at intervals, the control button (802) is inserted into the valve core movable cavity (801) to seal the connecting channel of a third air pipe (803) and a fourth air pipe (804) in the valve core movable cavity (801), the outer surface of the valve core movable cavity (801) is provided with a drainage hole (806), and the drainage hole (806) is connected with an internal groove-shaped drainage channel (807) of the valve core movable cavity (801).

8. The filling gun safety filling power chamber according to claim 7, characterized in that the inner barrel (2) comprises an inner barrel head (201), an inner barrel body (202) and a one-way valve core (203), the front end of the inner barrel body (202) extrudes the one-way valve core (203) through a second compression spring (10) to seal with the inner barrel head (201), and the rear end of the inner barrel body (202) is connected with the piston rod movable chamber (410) to form a transversely-connected power transmission structure; the filling gun is characterized in that the connecting pipe (7) is connected with a power chamber notch (411) at the rear end of the filling gun, a plurality of steam ports (11) are arranged on the inner ring of the power chamber notch (411), and a two-position four-way valve is arranged at each steam port (11) and is connected with the third chamber (403) and the connecting pipe (7).

9. The filling gun safety filling power chamber according to claim 8, characterized in that the handle mechanism (5) comprises a first handle (501) and a second handle (502), the first handle (501) is arranged on the rear seat of the power chamber (4), the second handle (502) is arranged on the body of the outer barrel (1), and the first handle (501) and the second handle (502) are connected and fixed to be arranged at a mutually perpendicular angle.

10. The filling gun safe filling power chamber according to claim 9, characterized in that a filling gun connecting port (13) is arranged on the body of the outer gun barrel (1), and the filling gun connecting port (13) is a bending space of 45-60 degrees to form a filling gun drainage channel.

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