LNG (Liquefied Natural Gas) liquid adding gun

Abstract

The utility model relates to the technical field of liquid adding guns, in particular to an LNG (Liquefied Natural Gas) liquid adding gun, which comprises an inner barrel, an outer barrel and an outer barrel, a valve control assembly is arranged at the end, connected with the filling port, of the inner cylinder, and a holding and grabbing mechanism used for being connected with the filling port is further arranged on the outer side of the inner cylinder. A driving mechanism is arranged on the outer side of the inner cylinder and used for driving the holding and grabbing mechanism to move. The inner cylinder is driven to move downwards through the handle, the inner cylinder can synchronously drive the spring seat to move downwards, when the spring seat moves downwards, the bottom of the spring seat abuts against the pulling-up frame to move upwards, and due to the fact that the pulling-up frame is connected with the clamping jaw through the driving connecting rod, when the pulling-up frame moves downwards, the clamping jaw is clamped in the pulling-up frame. When the inner cylinder is connected with the filling port, the lifting frame abuts against the clamping jaw through the driving connecting rod so that the clamping jaw can be fixed to a certain position, the clamping jaw can be clamped to the outer side of a convex ring of the filling port, and synchronous buckling and fixing of the clamping jaw and the filling port can be achieved in the connecting process of the inner cylinder and the filling port.

Description

Technical Field

[0001] This utility model relates to the field of liquid dispensing gun technology, and in particular to an LNG liquid dispensing gun. Background Technology

[0002] LNG (Liquefied Natural Gas) is the abbreviation for liquefied natural gas. Natural gas is a combustible gas naturally extracted from gas fields, primarily composed of methane. LNG is produced by cooling gaseous natural gas at atmospheric pressure to -162°C, causing it to condense into a liquid. Liquefaction of natural gas significantly saves storage and transportation space and offers advantages such as high calorific value and superior performance.

[0003] The refueling nozzle is the output terminal of the LNG refueling station. When refueling an LNG vehicle, the operator aligns the refueling nozzle with the refueling nozzle holder on the LNG vehicle, and then rotates the handle forward, along the direction of the refueling nozzle holder, to lock the refueling nozzle firmly onto the holder. During this process, LNG begins to be refueled through the refueling 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 refueling nozzle, quickly disengaging it from the refueling nozzle holder. The operation is then complete.

[0004] Currently, the operation of the gripping structure is not convenient enough during the connection process of some liquid dispensing guns and liquid dispensing gun holders, which affects the connection efficiency of the liquid dispensing gun. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the inconvenience of operating the gripping structure and its impact on the connection efficiency of the LNG dispensing gun, and to propose an LNG dispensing gun.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an LNG dispensing gun, including:

[0008] Inner cylinder used to connect gas pipelines and filling ports;

[0009] A valve control assembly is provided at one end of the inner cylinder connected to the filling port, and a gripping mechanism for connecting the filling port is also provided on the outside of the inner cylinder.

[0010] The outer side of the inner cylinder is provided with a drive mechanism, which is used to drive the gripping mechanism to move so as to achieve gripping and release from the filling port;

[0011] The gripping mechanism includes a lifting frame slidably connected to the outside of the inner cylinder and a main body sleeved on the outside of the lifting frame. The outside of the inner cylinder has a stop portion that abuts against the bottom of the lifting frame.

[0012] Furthermore, the valve control assembly includes an outer sleeve fixed to the inner cylinder at the filling port end, and a valve core is movably connected inside the outer sleeve, with one end of the valve core abutting against the open end of the outer sleeve to close it;

[0013] A first spring connects the valve core and the inner cylinder, and an outlet is opened on the outer circumferential surface of the valve core to communicate with the liquid outlet in the inner cylinder.

[0014] Furthermore, the outer side of the main body is provided with several rotating grooves, and a pawl is rotatably connected in the rotating groove. Both the pawl and the lifting frame have an extension, and a drive link is pinned between two of the extensions.

[0015] Furthermore, the driving mechanism includes multiple support rods fixed to the main body, and a lower fixing block is fixedly connected between the upper ends of the multiple support rods. The lower fixing block is slidably connected to the inner cylinder, and an upper fixing block is also fixed to the upper end of the inner cylinder. A control component for driving the inner cylinder to move up and down is provided between the upper fixing block and the lower fixing block.

[0016] Furthermore, the control component includes two connecting rods pinned to both sides of the upper fixing block, and two handles pinned to both sides of the lower fixing block, with the connecting rods and the handles pinned together at the middle.

[0017] Furthermore, a connecting plate is connected between the tops of the plurality of support rods, and the connecting plate slides with the inner cylinder;

[0018] The top of the connecting plate is fixedly connected to multiple rods, which are fixed to the lower fixing block by locking members. A second spring is installed between the connecting plate and the upper fixing block, and the middle of the lower fixing block has a through hole to avoid the second spring.

[0019] Furthermore, a spring seat is fixedly connected to the outer side of the inner cylinder, and the spring seat and the support rod are slidably connected. The spring seat abuts against the top of the lifting frame so as to drive the claw to move through the lifting frame.

[0020] A third spring is also installed between the spring seat and the support rod.

[0021] Furthermore, a fixing ring is fixedly connected to the outer side of the spring seat, the fixing ring extending downward and at least partially sleeved on the outer side of the claw.

[0022] Furthermore, both the upper fixing block and the spring seat are detachably connected to the inner cylinder.

[0023] Furthermore, an adapter is fixedly installed at one end of the inner cylinder that connects to the gas pipeline.

[0024] The LNG dispensing gun proposed in this utility model has the following advantages: In this utility model, the inner cylinder is driven to move downward by the handle, and the inner cylinder will simultaneously drive the spring seat to move downward. When the spring seat moves downward, the bottom of the spring seat abuts against the lifting frame and moves upward. Since the lifting frame and the pawl are connected by a drive linkage, when the lifting frame moves downward, the lifting frame will abut against the pawl through the drive linkage to fix it in a certain position. In this way, the pawl is engaged with the outside of the convex ring of the filling port. In this way, the connection between the inner cylinder and the filling port can be completed simultaneously, and the pawl and the filling port can be locked together synchronously, which greatly improves the convenience of the filling connection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] In the diagram: 1. Inner cylinder; 11. Stop; 12. Adapter; 2. Valve control assembly; 21. Outer sleeve; 22. Valve core; 23. First spring; 3. Grabbing mechanism; 31. Lifting frame; 32. Main body; 33. Rotating groove; 34. Claw; 35. Drive linkage; 4. Drive mechanism; 41. Support rod; 411. Connecting plate; 412. Rod; 42. Lower fixing block; 43. Upper fixing block; 44. Connecting rod; 45. Handle; 46. Second spring; 47. Spring seat; 48. Third spring; 49. Fixing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figure 1 As one embodiment of the present utility model, it discloses an LNG filling gun, specifically the filling gun includes an inner cylinder 1 for connecting the gas pipeline and the filling port;

[0029] A valve control assembly 2 is provided at one end of the inner cylinder 1 that is connected to the filling port, and a gripping mechanism 3 for connecting the filling port is also provided on the outside of the inner cylinder 1.

[0030] The inner cylinder 1 is provided with a drive mechanism 4 on its outer side. The drive mechanism 4 is used to drive the gripping mechanism 3 to move so as to achieve gripping and release from the filling port.

[0031] The gripping mechanism 3 includes a lifting frame 31 slidably connected to the outside of the inner cylinder 1 and a main body 32 sleeved on the outside of the lifting frame 31. The outer side of the inner cylinder 1 has a stop portion 11 that abuts against the bottom of the lifting frame 31.

[0032] In some embodiments, the valve control assembly 2 of the present invention includes an outer sleeve 21 fixed to the inner cylinder 1 at the end connected to the filling port, and a valve core 22 is movably connected inside the outer sleeve 21. One end of the valve core 22 abuts against the opening end of the outer sleeve 21 to close it. Of course, when the valve core 22 moves inward, the opening end of the outer sleeve 21 opens.

[0033] A first spring 23 connects the valve core 22 and the inner cylinder 1. The outer circumferential surface of the valve core 22 has an outlet that communicates with the liquid outlet in the inner cylinder 1. In this embodiment, there is also an inner expansion portion on the inner side of the outer sleeve 21. When adding liquefied natural gas to the outside, after the outer sleeve 21 is connected to the gas filling port, the push rod structure inside the gas filling port will abut against the valve core 22 and move inward. At this time, the valve core 22 opens the opening end of the outer sleeve 21. Since the outlet is provided on the outer circumference of the valve core 22, a passage is formed between the inner cylinder 1, the outlet, the inner expansion portion and the opening end of the outer sleeve 21, so as to achieve the purpose of adding gas.

[0034] Furthermore, in this embodiment, the outer side of the main body 32 is provided with several rotating grooves, and a pawl 34 is rotatably connected in the rotating groove 33. Both the pawl 34 and the lifting frame 31 have an extension, and a drive connecting rod 35 is pinned between the two extensions.

[0035] In other words, in this embodiment, the lifting frame 31 moves up and down to drive the pawl 34 to rotate. When connecting the filling port, if the pawl 34 needs to be engaged with the outer protruding ring of the filling port, the lifting frame 31 moves downward. At this time, the lifting frame 31 will rotate by driving the connecting rod 35 to abut against the pawl 34, so as to engage the pawl 34 with the outer protruding ring of the filling port. Conversely, when the lifting frame 31 does not apply downward pressure, the lifting frame 31 can move upward freely. At this time, the pawl 34 can be opened freely to complete the disengagement of the filling port.

[0036] Furthermore, in this embodiment, the driving mechanism 4 includes a plurality of support rods 41 fixed on the main body 32, and a lower fixing block 42 is fixedly connected between the upper ends of the plurality of support rods 41. The lower fixing block 42 is slidably connected to the inner cylinder 1, and an upper fixing block 43 is also fixed to the upper end of the inner cylinder 1. A control component for driving the inner cylinder 1 to move up and down is provided between the upper fixing block 43 and the lower fixing block 42.

[0037] Preferably, in this embodiment, the control component includes two connecting rods 44 pinned to both sides of the upper fixing block 43, and two handles 45 pinned to both sides of the lower fixing block 42, with the connecting rods 44 and the handles 45 pinned together at the middle.

[0038] In other words, during actual operation, when it is necessary to connect to the filling port, swing both hands on the two handles 45. When the two handles 45 rotate, they will drive the two connecting rods 44 to rotate, thus driving the upper fixed block 43 to move downward. At this time, with the main body 32 as the reference, the upper fixed block 43 drives the entire inner cylinder 1 to move downward. When the valve control component 2 at the bottom of the inner cylinder 1 abuts against the top rod structure in the filling port, the filling channel inside the inner cylinder 1 opens.

[0039] In addition, a spring seat 47 is fixedly connected to the outer side of the inner cylinder 1 in this invention. The spring seat 47 and the support rod 41 are slidably connected. The spring seat 47 abuts against the top of the lifting frame 31 so as to drive the claw 34 to move through the lifting frame 31.

[0040] A third spring 48 is also installed between the spring seat 47 and the support rod 41.

[0041] In summary, when the entire inner cylinder 1 moves downward, the inner cylinder 1 will simultaneously drive the spring seat 47 to move downward. When the spring seat 47 moves downward, the bottom of the spring seat 47 abuts against the lifting frame 31 and moves upward. As can be seen from the connection structure of the lifting frame 31 and the claw 34, when the lifting frame 31 moves downward, the lifting frame 31 will rotate by driving the connecting rod 35 to abut against the claw 34, so as to engage the claw 34 on the outside of the protruding ring of the filling port. In this way, the connection process between the inner cylinder 1 and the filling port can be completed, and the claw 34 and the filling port can be simultaneously engaged and fixed, which greatly improves the convenience of the filling connection.

[0042] In some embodiments, a connecting plate 411 is connected between the tops of the plurality of support rods 41 in this invention, and the connecting plate 411 slides with the inner cylinder 1;

[0043] The top of the connecting plate 411 is fixedly connected to a plurality of rods 412. The rods 412 are fixed to the lower fixing block 42 by locking members. Preferably, in this embodiment, the locking member is a bolt and the rods 412 are bolts. The lower fixing block 42 is clamped and fixed by the connection of the bolts and the rods 412. A second spring 46 is installed between the connecting plate 411 and the upper fixing block 43. The lower fixing block 42 has a through hole in the middle to avoid the second spring 46. Preferably, in this embodiment, four rods 412 are provided and three support rods 41 are provided.

[0044] Furthermore, in this utility model, a fixing ring 49 is also fixedly connected to the outer side of the spring seat 47. The fixing ring 49 extends downward and is at least partially sleeved on the outer side of the pawl 34. In this embodiment, the fixing ring 49 is fixed to the outer side of the spring seat 47 by bolts. The function of the fixing ring 49 is to stop the outer range of motion of the pawl 34, so as to avoid the pawl 34 from rotating freely outward, which would cause the rotation angle to be too large and affect the subsequent connection.

[0045] It should be noted that, in this embodiment, the upper fixing block 43 and the spring seat 47 are detachably connected to the inner cylinder 1. In this embodiment, two annular grooves are opened on the outer side of the inner cylinder 1. Positioning pins are provided on the upper fixing block 43 and the spring seat 47. The positioning pins are inserted in the annular grooves to achieve the connection and fixation of the upper fixing block 43 and the spring seat 47. Of course, the positioning pins can be connected by threads to facilitate installation and disassembly.

[0046] In order to facilitate the connection with the liquid supply pipeline, an adapter 12 is fixedly installed at one end of the inner cylinder 1 that connects to the gas transmission pipeline in this embodiment. The adapter 12 is existing technology and will not be described in detail here.

[0047] In summary, in this utility model, the inner cylinder 1 is driven to move downward by the handle 45, and the inner cylinder 1 will simultaneously drive the spring seat 47 to move downward. When the spring seat 47 moves downward, the bottom of the spring seat 47 abuts against the lifting frame 31 and moves upward. Since the lifting frame 31 and the claw 34 are connected by the driving link 35, when the lifting frame 31 moves downward, the lifting frame 31 will abut against the claw 34 through the driving link 35 to fix it in a certain position. In this way, the claw 34 is engaged with the outside of the protruding ring of the filling port. In this way, the connection between the inner cylinder 1 and the filling port can be completed, and the claw 34 and the filling port can be simultaneously engaged and fixed, which greatly improves the convenience of filling connection.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An LNG dispensing gun, characterized in that, include: An inner cylinder (1) for connecting the gas pipeline and the filling port; a valve control assembly (2) is provided at one end of the inner cylinder (1) connected to the filling port, and a gripping mechanism (3) for connecting the filling port is also provided on the outside of the inner cylinder (1); a driving mechanism (4) is provided on the outside of the inner cylinder (1), and the driving mechanism (4) is used to drive the gripping mechanism (3) to move in order to achieve gripping and release from the filling port; the gripping mechanism (3) includes a lifting frame (31) slidably connected to the outside of the inner cylinder (1) and a main body (32) sleeved on the outside of the lifting frame (31), and a stop (11) abutting the bottom of the lifting frame (31) on the outside of the inner cylinder (1).

2. An LNG dispensing gun according to claim 1, characterized in that: The valve control assembly (2) includes an outer sleeve (21) fixed to the inner cylinder (1) at the end of the filling port, and a valve core (22) is movably connected inside the outer sleeve (21). One end of the valve core (22) abuts against the opening end of the outer sleeve (21) to close it. A first spring (23) is connected between the valve core (22) and the inner cylinder (1), and an outlet is opened on the outer circumferential surface of the valve core (22) to communicate with the liquid outlet in the inner cylinder (1).

3. The LNG dispensing gun according to claim 1, characterized in that: The outer side of the main body (32) is provided with several rotating grooves, and a pawl (34) is rotatably connected in the rotating groove (33). Both the pawl (34) and the lifting frame (31) have an extension, and a drive link (35) is pinned between the two extensions.

4. An LNG dispensing gun according to claim 3, characterized in that: The drive mechanism (4) includes multiple support rods (41) fixed on the main body (32). A lower fixing block (42) is fixedly connected between the upper ends of the multiple support rods (41). The lower fixing block (42) is slidably connected to the inner cylinder (1). An upper fixing block (43) is also fixed at the upper end of the inner cylinder (1). A control component for driving the inner cylinder (1) to move up and down is provided between the upper fixing block (43) and the lower fixing block (42).

5. An LNG dispensing gun according to claim 4, characterized in that: The control assembly includes two connecting rods (44) pinned to both sides of the upper fixing block (43), and two handles (45) pinned to both sides of the lower fixing block (42). The connecting rods (44) and the handles (45) are pinned to the middle.

6. An LNG dispensing gun according to claim 5, characterized in that: A connecting plate (411) is connected to the top of the multiple support rods (41), and the connecting plate (411) slides with the inner cylinder (1); wherein multiple rods (412) are fixedly connected to the top of the connecting plate (411), and the rods (412) are fixed to the lower fixing block (42) by locking members, and a second spring (46) is installed between the connecting plate (411) and the upper fixing block (43), and the lower fixing block (42) has a through hole in the middle to avoid the second spring (46).

7. An LNG dispensing gun according to claim 4, characterized in that: A spring seat (47) is fixedly connected to the outer side of the inner cylinder (1). The spring seat (47) and the support rod (41) are slidably connected. The spring seat (47) abuts against the top of the lifting frame (31) so as to drive the claw (34) to move through the lifting frame (31). A third spring (48) is also installed between the spring seat (47) and the support rod (41).

8. An LNG dispensing gun according to claim 7, characterized in that: A fixing ring (49) is also fixedly connected to the outside of the spring seat (47), the fixing ring (49) extending downward and at least partially sleeved on the outside of the claw (34).

9. An LNG dispensing gun according to claim 7, characterized in that: The upper fixing block (43) and the spring seat (47) are both detachably connected to the inner cylinder (1).

10. An LNG dispensing gun according to any one of claims 1-9, characterized in that: An adapter (12) is fixedly installed at one end of the inner cylinder (1) that is connected to the gas pipeline.

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