LNG angle type pneumatic liquid adding gun

Abstract

The utility model discloses an LNG angle type pneumatic liquid adding gun which comprises a gun body internally provided with a liquid adding pipe, one end of the gun body is hollowed out and is kept to be connected with a driving mechanism, and one end of the liquid adding pipe is movably connected with a valve element. The other end of the liquid adding pipe is arranged on the driving portion of the driving mechanism and driven by the driving mechanism to be connected with or disconnected from the valve element, a clamping jaw is further hinged to the end, close to the valve element, of the gun body, a supporting sleeve is movably arranged in the gun body, and one end of the clamping jaw is further hinged to the supporting sleeve. According to the pneumatic liquid adding gun, the gun body is directly connected with the driving mechanism, meanwhile, the supporting sleeve used for being connected with the clamping jaw is arranged at the inner end of the gun body, the situation that a connecting rod is arranged on the outer side of the gun body of a traditional liquid adding gun is replaced, instability caused when the clamping jaw and the driving mechanism are connected through the connecting rod is avoided, and meanwhile the weight of the whole gun body is reduced; the operation is convenient.

Description

Technical Field

[0001] This utility model relates to LNG refueling equipment, specifically an LNG angle-type pneumatic refueling gun. Background Technology

[0002] The refueling nozzle is the output terminal of an LNG refueling station. When refueling an LNG vehicle, the operator aligns the nozzle with the refueling nozzle holder on the LNG vehicle, then rotates the handle forward, locking the nozzle firmly onto the holder. Simultaneously, LNG begins to be refueled through the nozzle. After refueling is complete, the operator rotates the handle back to its initial position, gently presses the handle backward to open the latches, and pulls out the nozzle, quickly disengaging it from the holder. The operation is now complete.

[0003] A search revealed that Chinese utility model patent CN202120330249.4 discloses an LNG dispensing gun, relating to the field of LNG dispensing equipment technology. This utility model includes a housing body, a handle assembly, a dispensing movable rod, a dispensing valve core assembly, and a claw assembly. The claw assembly includes a locking claw, a claw connecting disc, a claw connecting rod, a claw spring, and a limiting sleeve. The limiting sleeve is mounted on the dispensing movable rod and corresponds to the limiting portion of the locking claw. One end of the claw connecting rod is hinged to the connecting portion of the locking claw, and the other end is hinged to the end of the claw connecting disc. The claw connecting disc is sleeved on the connecting post between the dispensing movable rod and the housing body. The claw spring is sleeved on the connecting post, with one end limited by the claw connecting disc and the other end limited by a limiting step on the connecting post. The limiting sleeve is provided with a first limiting step, a second limiting step, and a limiting groove. This invention enables rapid connection of the LNG dispensing gun, with a good seal, effectively ensuring the connection stability of the dispensing gun.

[0004] However, in actual use, the connecting mechanism in the chuck assembly of this dispensing gun includes a connecting post located at the outer end of the dispensing rod. The chuck is movably connected to the fixed plate through the connecting post and a chuck spring at one end of the connecting post. Since the chuck rotates during use, the tension or pressure generated during the rotation of the chuck may cause the connecting post to deform or tilt. In order to ensure the strength of the connecting post, it is necessary to make the connecting post with a high-strength material. However, the use of a high-strength material for the connecting post will increase the overall weight of the dispensing gun, making it inconvenient for operators to operate. Utility Model Content

[0005] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides an LNG angle-type pneumatic liquid dispensing gun. This pneumatic liquid dispensing gun directly connects the gun body to the drive mechanism, and sets the support sleeve of the connecting claw inside the gun body, which can effectively improve the stability of the gun body and reduce the weight, making the entire liquid dispensing gun lighter and more convenient for workers to handle and perform liquid dispensing operations.

[0006] This invention is implemented as follows: an LNG angle-type pneumatic dispensing gun is constructed, including a gun body with a dispensing tube inside. One end of the gun body is hollowed out and connected to a drive mechanism. One end of the dispensing tube is movably connected to a valve core. The other end of the dispensing tube is set on the drive part of the drive mechanism and is connected to and disconnected from the valve core as the drive mechanism drives. A first return spring is also provided between the dispensing tube and the valve core. An inlet tube communicating with the dispensing tube is obliquely passed through the hollow part of the gun body. A pawl is also hinged to the end of the gun body near the valve core. A support sleeve is movably arranged inside the gun body, and one end of the pawl is also hinged to the support sleeve.

[0007] Furthermore, a pneumatic control structure for driving the drive mechanism is provided on the drive mechanism. The pneumatic control structure specifically includes a housing, a connecting block, and a control rod. The housing has a receiving cavity inside and is open at both ends. An air inlet is provided on the side end of the housing, and the air inlet is connected to the receiving cavity through an air inlet channel. An exhaust hole is provided on the opposite side end of the housing where the air inlet is located, and the exhaust hole is connected to the receiving cavity through an exhaust channel. A fixing hole is also provided on the housing.

[0008] Furthermore, one end of the control rod passes through the connecting block and is inserted into the housing. Multiple protrusions are provided on the receiving cavity part of the control rod inserted into the housing. The diameter of the protrusions corresponds to the inner diameter of the receiving cavity. The receiving cavity is divided into multiple areas by the protrusions on the control rod. The connection and disconnection between the internal receiving cavity separation areas and the air intake channel are realized by the movement of the control rod relative to the housing and the connecting block.

[0009] Furthermore, the drive mechanism includes a cylinder body, inside which a first piston and a second piston are disposed. The first piston and the second piston divide the interior of the cylinder body into a first region, a second region, and a third region. The second piston is connected to the liquid filling pipe for pushing the liquid filling pipe to move linearly, and the first piston drives the drive mechanism to move linearly.

[0010] Furthermore, the drive mechanism is connected to the pneumatic control mechanism via a connecting plate. The housing cavity is also provided with three vent holes. The connecting plate is provided with a first connecting hole, a second connecting hole, and a third connecting hole that communicate with the three vent holes. The first connecting hole, the second connecting hole, and the third connecting hole are respectively connected to the first region, the second region, and the third region of the cylinder.

[0011] By using the above settings, the linear movement of the control lever within the housing can alter the connection and disconnection between the various compartments inside the containment chamber and the air intake pipe. This allows high-pressure air to enter the various areas of the cylinder in sequence, thereby enabling the pawl and valve core to move sequentially. This prevents simultaneous movement from causing the gun body to detach from the filling port, which could lead to a safety accident. Simultaneously, it enables the entire filling process, including locking, filling, depressurizing, and gun retraction.

[0012] Furthermore, a handheld lever is provided at the outer end of the drive mechanism.

[0013] Furthermore, one end of the claw is hook-shaped, which clamps and fixes the external injection port through the hook structure. The middle part of the claw is hinged to the gun body through a pin, and the other end of the claw is connected to the support sleeve through a hinge plate.

[0014] Furthermore, one end of the support sleeve is a support portion, which is in the same direction as the claw, and the other end of the support sleeve is connected to the gun body through a movable connecting block. A second return spring is provided between the support sleeve and the movable connecting block to keep it movable.

[0015] Furthermore, a heat insulation plate is provided between the gun body and the drive mechanism.

[0016] Furthermore, the gun body is made of high-strength, lightweight material, especially the end near the drive mechanism, which is made of lightweight material.

[0017] This utility model has the following beneficial effects:

[0018] This pneumatic liquid dispensing gun directly connects the gun body to the drive mechanism, and places the support sleeve of the connecting claw inside the gun body, which can effectively improve the stability of the gun body and reduce its weight, making the entire liquid dispensing gun lighter and easier for staff to handle and perform liquid dispensing operations.

[0019] This pneumatic dispensing gun, through its internal pneumatic control structure, not only ensures that the chuck and valve core move under the control of the air source, thus achieving automatic movement of the chuck and valve core and reducing the labor intensity of the operator, but also allows the control rod inside the pneumatic control structure to move linearly. During the movement, it changes the receiving area inside the housing, connecting (or disconnecting) the three areas of the air intake channel and the cylinder through different receiving areas. This allows the chuck and valve core to move in sequence, thereby realizing the action process of the pneumatic dispensing gun first locking and then dispensing, and after dispensing, first depressurizing and then retracting the gun. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a front view schematic diagram of the present invention;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0024] Figure 5 This is a schematic diagram from another perspective of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of this utility model without the cavity;

[0026] Figure 7 This is a schematic diagram showing the connection between the claw and the support sleeve in this utility model;

[0027] Figure 8 This is a cross-sectional schematic diagram of the pneumatic control structure in this utility model;

[0028] Figure 9 This is a cross-sectional schematic diagram of the pneumatic control structure and drive mechanism in this utility model;

[0029] Figure 10 yes Figure 9 A magnified view of part B in the diagram;

[0030] In the diagram: 1. Housing; 1.1. Fixing hole; 1.2. Exhaust hole; 1.3. Vent hole; 1.4. Exhaust passage; 1.5. Inlet hole; 1.6. Inlet passage; 1.7. Receiving cavity; 2. Connecting block; 3. Control rod; 3.1. Protruding ridge; 4. Connecting plate; 4.1. First connecting hole; 4.2. Second connecting hole; 4.3. Third connecting hole; 5. Cylinder; 5.1. First area; 5.2. Second area; 5.3. Third area; 5.4. First piston; 5.5. Second piston; 6. Hand lever; 7. Gun body; 8. Liquid inlet pipe; 9. Liquid filling pipe; 10. Claw; 10.1. Pin; 10.2. Hinge plate; 11. Support sleeve; 11.1. Support part; 11.2. Movable connecting block; 11.3. Second return spring; 12. Valve core; 13. First return spring. Detailed Implementation

[0031] The following will be combined with the appendix Figures 1-10 This utility model is described in detail to address the problems described above, such as the instability and easy deformation of the connecting column caused by the rotation of the chuck in the existing LNG dispensing gun during use, and the large weight of the existing LNG dispensing gun, which makes it inconvenient for operators to handle.

[0032] This utility model provides an improved LNG angle-type pneumatic liquid dispensing gun, which can be implemented as follows: An LNG angle-type pneumatic liquid dispensing gun includes a gun body 7 with a dispensing pipe 9 inside. One end of the gun body 7 is hollowed out and connected to a drive mechanism. One end of the dispensing pipe 9 is movably connected to a valve core 12. The other end of the dispensing pipe 9 is set on the drive part of the drive mechanism and is connected to and disconnected from the valve core 12 as the drive mechanism drives. A first return spring 13 is also provided between the dispensing pipe 9 and the valve core 12. An inlet pipe 8 communicating with the dispensing pipe 9 is obliquely passed through the hollow part of the gun body 7. A pawl 10 is also hinged to the end of the gun body 7 near the valve core 12. A support sleeve 11 is movably arranged inside the gun body 7. One end of the pawl 10 is also hinged to the support sleeve 11.

[0033] As attached Figure 8 As shown, in this embodiment, a pneumatic control structure for driving the drive mechanism is provided on the drive mechanism. The pneumatic control structure specifically includes a housing 1, a connecting block 2, and a control rod 3. The housing 1 has a receiving cavity 1.7 inside and is open at both ends. An air inlet 1.5 is provided on the side end of the housing 1. The air inlet 1.5 is connected to the receiving cavity 1.7 through an air inlet channel 1.6. An exhaust hole 1.2 is provided on the opposite side end of the housing 1 where the air inlet 1.5 is provided. The exhaust hole 1.2 is connected to the receiving cavity 1.7 through an exhaust channel 1.4. A fixing hole 1.1 is also provided on the housing 1.

[0034] In this embodiment, one end of the control rod 3 passes through the connecting block 2 and is inserted into the housing 1. Multiple protruding ridges 3.1 are provided on the part of the control rod 3 inserted into the receiving cavity 1.7 of the housing 1. The diameter of the protruding ridges 3.1 corresponds to the inner diameter of the receiving cavity 1.7. The receiving cavity 1.7 is divided into multiple areas by the protruding ridges 3. The connection and disconnection between the internal receiving cavity 1.7 and the air intake channel 1.6 are realized by the movement of the control rod 3 relative to the housing 1 and the connecting block 2.

[0035] When the operator pulls or pushes the control lever 3 to move it inside the housing 1, if the protrusion 3.1 is located at the connection between the air intake channel 1.6 and the receiving cavity 1.7, a certain sense of hesitation will be generated. This hesitation can prevent the liquid gun from falling off if locking and filling, depressurization and gun retraction are carried out at the same time.

[0036] As attached Figure 9 and attached Figure 10As shown, in this embodiment, the driving mechanism includes a cylinder 5, inside which a first piston 5.4 and a second piston 5.5 are disposed. The first piston 5.4 and the second piston 5.5 divide the interior of the cylinder 5 into a first region 5.1, a second region 5.2 and a third region 5.3. The second piston 5.5 is connected to the liquid filling pipe 9 to push the liquid filling pipe 9 to move linearly. The first piston 5.4 drives the driving mechanism to move linearly.

[0037] In this embodiment, the drive mechanism is connected to the pneumatic control mechanism via the connecting plate 4. The housing 1 has three ventilation holes 1.3 in its accommodating cavity 1.7. The connecting plate 4 is provided with a first connecting hole 4.1, a second connecting hole 4.2, and a third connecting hole 4.3 that communicate with the three ventilation holes 1.3. The first connecting hole 4.1, the second connecting hole 4.2, and the third connecting hole 4.3 are respectively connected to the first region 5.1, the second region 5.2, and the third region 5.3 of the cylinder 5.

[0038] By using the above settings, the linear movement of the control lever within the housing can alter the connection and disconnection between the various compartments inside the containment chamber and the air intake pipe. This allows high-pressure air to enter the various areas of the cylinder in sequence, thereby enabling the pawl and valve core to move sequentially. This prevents simultaneous movement from causing the gun body to detach from the filling port, thus avoiding a safety accident.

[0039] In this embodiment, a handheld lever 6 is also provided at the outer end of the drive mechanism.

[0040] As attached Figure 7 As shown, in this embodiment, one end of the claw 10 is hook-shaped, which clamps and fixes the external injection port through the hook structure. The middle part of the claw 10 is hinged to the gun body 7 through the pin 10.1, and the other end of the claw 10 is connected to the support sleeve 11 through the hinge plate 10.2.

[0041] In this embodiment, one end of the support sleeve 11 is a support part 11.1, which is in the same direction as the claw 10. The other end of the support sleeve 11 is connected to the gun body 7 through a movable connecting block 11.2. A second return spring 11.3 is provided between the support sleeve 11 and the movable connecting block 11.2 to keep it movable.

[0042] In this embodiment, a heat insulation plate is also provided between the gun body 7 and the drive mechanism.

[0043] In this embodiment, the end of the gun body 7 near the drive mechanism is made of a lightweight material, which may be an aluminum alloy.

[0044] The method of using this pneumatic LNG dispensing gun is as follows:

[0045] 1. First, insert the end of the gun body 7 near the pawl 10 into the vehicle's refueling port;

[0046] 2. The operator pushes the control lever 3 into the housing 1. When the first jerk is felt, the protrusion 3.1 will block any one of the air intake channels 1.6. Continue pushing the control lever 3 to keep the protrusion 3.1 separated from the air intake channel 1.6 (as shown in the attached diagram). Figure 8 At this point, the outermost protrusion 3.1 (shown as the right end in the figure) and its adjacent protrusion 3.1 are connected to the air intake channel 1.6, while the opposite outermost protrusion 3.1 (leftmost end) and its adjacent protrusion 3.1 are blocked from the air intake channel. High-pressure gas is added to the inside of the housing 1 through the air intake hole 1.5. The gas enters the receiving cavity 1.7 of the outermost protrusion 3.1 (rightmost end), its adjacent protrusion 3.1, and the middle protrusion 3.1, and then passes through the corresponding vent hole 1.3, the second connecting hole 4.2, and the third connecting hole 4.3, entering the second region 5.2 and the third region 5.3. The convex ridges 3.1 corresponding to region 5.1 are not connected to the air intake channel 1.6. Therefore, the air pressure in the first region 5.1 is lower than that in the second region 5.2 and the third region 5.3. Under the action of the air pressure difference, the first piston 5.4 is pushed to one end, thereby transmitting a part of the force to the drive mechanism and the gun body 7. Since the end of the gun body 7 is in contact with the filling port, and the support part of the support sleeve 11 is fixed at the filling port position, when the gun body 7 is pushed to move, the second return spring 11.3 will be squeezed, thereby driving the pawl 10 on the gun body 7 to rotate around the hinge point, so as to lock the liquid gun pawl 10 with the filling port of the car.

[0047] 3. Based on the locking status, the operator pushes the control lever 3 back into the housing 1. The movement method is as described above and will not be repeated here. Finally, the second piston 5.5 and the liquid filling pipe 9 are pushed outward, squeezing the first return spring 13 and driving the valve core 12 to maintain the connection between the filling port and the liquid filling pipe 9, thus realizing the filling.

[0048] 4. After filling is completed, pull the control lever 3 outward. The movement method is as described above and will not be repeated here. The second piston 5.5 loses the pressure of the external high-pressure air source. Under the elastic action of the first return spring 13, the filling port is disconnected from the filling pipe 9, realizing pressure relief.

[0049] 5. Continue to pull the control lever. The movement method is as described above and will not be repeated here. The first piston 5.4 loses the pressure of the external high-pressure air source. Under the elastic action of the second return spring 11.3, the pawl disengages from the filling port, making it easier to withdraw the gun.

[0050] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. An LNG angle-type pneumatic dispensing gun, characterized in that: The gun body (7) includes an internal liquid filling tube (9). One end of the gun body (7) is hollowed out and connected to the drive mechanism. One end of the liquid filling tube (9) is movably connected to the valve core (12). The other end of the liquid filling tube (9) is set on the drive part of the drive mechanism and is connected to the valve core (12) as the drive mechanism drives. A first reset spring (13) is also provided between the liquid filling tube (9) and the valve core (12). An inlet tube (8) connected to the liquid filling tube (9) is obliquely passed through the hollow part of the gun body (7). A pawl (10) is also hinged on the end of the gun body (7) near the valve core (12). A support sleeve (11) is movably provided inside the gun body (7). One end of the pawl (10) is also hinged to the support sleeve (11).

2. The LNG angle-type pneumatic dispensing gun according to claim 1, characterized in that: A pneumatic control structure for driving the drive mechanism is provided on the drive mechanism. The pneumatic control structure specifically includes a housing (1), a connecting block (2), and a control rod (3). The housing (1) has a receiving cavity (1.7) inside and keeps both ends open. An air inlet (1.5) is provided on the side end of the housing (1). The air inlet (1.5) is connected to the receiving cavity (1.7) through an air inlet channel (1.6). An exhaust hole (1.2) is provided on the opposite side end of the housing (1) where the air inlet (1.5) is provided. The exhaust hole (1.2) is connected to the receiving cavity (1.7) through an exhaust channel (1.4). A fixing hole (1.1) is also provided on the housing (1).

3. The LNG angle-type pneumatic dispensing gun according to claim 2, characterized in that: One end of the control rod (3) passes through the connecting block (2) and is inserted into the housing (1). Multiple protrusions (3.1) are provided on the part of the control rod (3) inserted into the housing (1.7). The diameter of the protrusions (3.1) corresponds to the inner diameter of the housing (1.7). The housing (1.7) is divided into multiple areas by the protrusions (3.1) on the control rod (3). The connection and disconnection between the internal housing (1.7) and the air intake channel (1.6) are realized by the movement of the control rod (3) relative to the housing (1) and the connecting block (2).

4. The LNG angle-type pneumatic dispensing gun according to claim 2, characterized in that: The drive mechanism includes a cylinder (5) with a first piston (5.4) and a second piston (5.5) inside. The first piston (5.4) and the second piston (5.5) divide the interior of the cylinder (5) into a first region (5.1), a second region (5.2) and a third region (5.3). The second piston (5.5) is connected to the liquid filling pipe (9) to push the liquid filling pipe (9) to move linearly. The first piston (5.4) drives the drive mechanism to move linearly.

5. The LNG angle-type pneumatic dispensing gun according to claim 4, characterized in that: The drive mechanism is connected to the pneumatic control mechanism through the connecting plate (4). The housing (1) has three ventilation holes (1.3) in its accommodating cavity (1.7). The connecting plate (4) is provided with a first connecting hole (4.1), a second connecting hole (4.2) and a third connecting hole (4.3) that communicate with the three ventilation holes (1.3). The first connecting hole (4.1), the second connecting hole (4.2) and the third connecting hole (4.3) are respectively connected to the first region (5.1), the second region (5.2) and the third region (5.3) of the cylinder (5).

6. The LNG angle-type pneumatic dispensing gun according to claim 5, characterized in that: The outer end of the drive mechanism is also provided with a hand lever (6).

7. The LNG angle-type pneumatic dispensing gun according to claim 1, characterized in that: One end of the claw (10) is hook-shaped, which clamps and fixes the external injection port through the hook structure. The middle part of the claw (10) is hinged to the gun body (7) through the pin (10.1), and the other end of the claw (10) is connected to the support sleeve (11) through the hinge plate (10.2).

8. The LNG angle-type pneumatic dispensing gun according to claim 7, characterized in that: One end of the support sleeve (11) is a support part (11.1), which is in the same direction as the claw (10). The other end of the support sleeve (11) is connected to the gun body (7) through a movable connecting block (11.2). A second return spring (11.3) is provided between the support sleeve (11) and the movable connecting block (11.2) to keep it movable.

9. The LNG angle-type pneumatic dispensing gun according to claim 1, characterized in that: A heat insulation plate is also provided between the gun body (7) and the drive mechanism.

10. An LNG angle-type pneumatic dispensing gun according to claim 1, characterized in that: The gun body (7) is made of high-strength, lightweight material.

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