Vehicle-mounted hydrogen supply pressure reducing valve connecting structure

Abstract

The utility model belongs to pipeline connection field, specifically is a kind of vehicle-mounted hydrogen supply pressure reducing valve connecting structure, including pipe seat and connecting pipe, pipe seat and connecting pipe are connected by pipeline connection component between;The surface of connecting pipe is equipped with sleeve, and the end, away from pipe seat of sleeve, is equipped with through-hole, and connecting pipe penetrates through-hole and is slidably connected therewith, in use, pipe seat is welded in the air inlet of pressure reducing valve, the end of connecting pipe is connected with hydrogen pipeline, and connecting pipe and pipe seat are connected directly by pipeline connection mechanism, sleeve is slidably connected on connecting pipe, connecting pipe penetrates the through-hole of sleeve end portion, sleeve and connecting pipe are connected and sealed, and sleeve and pipe seat are sealed twice by flange, bolt and sealing element, to improve sealing effect, to reduce the hydrogen leakage after the failure of pipeline connection mechanism, improve the safety of hydrogen delivery.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection, specifically a connection structure for a vehicle-mounted hydrogen supply pressure reducing valve. Background Technology

[0002] In current technologies, hydrogen pressure reducing valves are key pressure control devices in hydrogen energy systems. Their core function is to stably reduce high-pressure hydrogen to the required low pressure and maintain constant pressure under dynamic operating conditions.

[0003] However, in use, the existing pressure reducing valve and hydrogen pipeline are only connected by a single-layer connection mechanism, which has poor sealing performance. When the connection mechanism fails, it is easy to cause hydrogen leakage at the connection point. Therefore, a vehicle-mounted hydrogen supply pressure reducing valve connection structure is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a vehicle-mounted hydrogen supply pressure reducing valve connection structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The vehicle-mounted hydrogen supply pressure reducing valve connection structure of this utility model includes a pipe seat and a connecting pipe, which are connected by a pipe connection assembly; a sleeve is fitted on the surface of the connecting pipe, and a through hole is opened at the end of the sleeve away from the pipe seat, through which the connecting pipe passes and is slidably connected; a flange is fixedly connected to the ends of the sleeve and the connecting pipe that are close to each other, and the two flanges are detachably connected by bolts; a sealing element is installed between the two flanges.

[0006] Preferably, the pipe connection assembly includes a plug, a fixing sleeve, and a steel ball. The plug is fixed to the end of the pipe seat, and the end of the connecting pipe has a socket. The plug is inserted into the socket and slidably connected thereto. The side of the socket has multiple through grooves, and the steel ball is slidably connected inside the through grooves. The fixing sleeve is slidably connected to the surface of the connecting pipe.

[0007] Preferably, a spring is fixedly connected to the end of the fixing sleeve away from the tube seat, the end of the spring is fixedly connected to the connecting tube, and the steel ball is located inside the fixing sleeve.

[0008] Preferably, the end of the through hole near the pipe seat has an inclined surface, and a sealing seat is fixedly connected to the surface of the connecting pipe at a position corresponding to the inclined surface. The sealing seat has a conical structure.

[0009] Preferably, a first sealing ring is installed at the end of the insertion hole, and the first sealing ring is located between the insertion tube and the side wall of the insertion hole.

[0010] Preferably, the surface of the sealing seat has a groove, and a second sealing ring is installed inside the groove.

[0011] The advantages of this utility model are:

[0012] 1. This utility model, by setting up a sleeve, flange, bolts, seals, pipe seat, and connecting pipe, allows the pipe seat to be welded to the inlet of the pressure reducing valve during use. The end of the connecting pipe is connected to the hydrogen pipeline. The connecting pipe and the pipe seat are directly connected through the pipeline connection mechanism. A sleeve is slidably connected to the connecting pipe, and the connecting pipe passes through the through hole at the end of the sleeve. The sleeve and the connecting pipe are connected and sealed. The sleeve and the pipe seat are sealed a second time through the flange, bolts, and seals. This can improve the sealing effect, thereby reducing the possibility of hydrogen leakage after the pipeline connection mechanism fails, and improving the safety of hydrogen transportation.

[0013] 2. By setting a first sealing ring and a second sealing ring, the side of the through hole is provided with an inclined surface during use. The inclined surface fits into the sealing seat to seal, thereby sealing the sleeve and the sealing seat. The first sealing ring is used to seal between the insertion tube and the insertion hole, and the second sealing ring is used to seal between the sealing seat and the inclined surface at the end of the through hole, thereby improving the overall sealing effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the inclined plane structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the flange structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the socket structure of this utility model.

[0020] In the diagram: 11. Pipe seat; 12. Connecting pipe; 13. Sleeve; 14. Flange; 15. Bolt; 16. Through hole; 17. Seal; 21. Insert pipe; 22. Insert hole; 23. Steel ball; 24. Fixing sleeve; 25. Slot; 3. Spring; 41. Inclined surface; 42. Sealing seat; 5. First sealing ring; 6. Second sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Specific implementation examples are given below.

[0023] Please see Figure 1-5 As shown, a vehicle-mounted hydrogen supply pressure reducing valve connection structure includes a pipe seat 11 and a connecting pipe 12, which are connected by a pipe connection assembly. A sleeve 13 is fitted onto the surface of the connecting pipe 12. A through hole 16 is formed at the end of the sleeve 13 away from the pipe seat 11. The connecting pipe 12 passes through the through hole 16 and is slidably connected thereto. Flanges 14 are fixedly connected to the ends of the sleeve 13 and the connecting pipe 12 that are close to each other. The two flanges 14 are detachably connected by bolts 15, and a sealing element 17 is installed between the two flanges 14. The pipe connection... The connecting assembly includes a cannula 21, a fixing sleeve 24, and a steel ball 23. The cannula 21 is fixedly connected to the end of the tube seat 11. The end of the connecting tube 12 has a insertion hole 22. The cannula 21 is inserted into the insertion hole 22 and slidably connected thereto. The side of the insertion hole 22 has multiple through slots. The steel ball 23 is slidably connected inside the through slots. The fixing sleeve 24 is slidably connected to the surface of the connecting tube 12. A spring 3 is fixedly connected to the end of the fixing sleeve 24 away from the tube seat 11. The end of the spring 3 is fixedly connected to the connecting tube 12. The steel ball 23 is located inside the fixing sleeve 24.

[0024] In use, the pipe seat 11 is welded to the inlet of the pressure reducing valve, and the end of the connecting pipe 12 is connected to the hydrogen pipeline. The connecting pipe 12 and the pipe seat 11 are directly connected through the pipeline connection mechanism. A sleeve 13 is slidably connected to the connecting pipe 12. The connecting pipe 12 passes through the through hole 16 at the end of the sleeve 13. The sleeve 13 and the connecting pipe 12 are connected and sealed. The sleeve 13 and the pipe seat 11 are sealed twice through the flange 14, bolts 15 and sealing element 17. This can improve the sealing effect, thereby reducing the possibility of hydrogen leakage after the pipeline connection mechanism fails, and improving the safety of hydrogen transportation.

[0025] The pipe connection mechanism includes a fixed sleeve 24, a plug rod, and a steel ball 23. The plug tube 21 is inserted into the plug hole 22 at the end of the connecting tube 12. Then, the fixed sleeve 24 is slid, and the fixed sleeve 24 moves to push the steel ball 23 to slide in the through groove. The side of the steel ball 23 is inserted into the groove 25 to connect the plug tube 21 and the connecting tube 12. The spring 3 pushes the fixed sleeve 24 to move, and the fixed sleeve 24 blocks the side of the steel ball 23 to reduce the possibility of it falling off.

[0026] Furthermore, such as Figure 1-5 As shown, the through hole 16 has a bevel 41 at one end near the tube seat 11, and a sealing seat 42 is fixedly connected to the surface of the connecting tube 12 at a position corresponding to the bevel 41. The sealing seat 42 has a conical structure. A first sealing ring 5 is installed at the end of the insertion hole 22, and the first sealing ring 5 is located between the insertion tube 21 and the side wall of the insertion hole 22. A groove is formed on the surface of the sealing seat 42, and a second sealing ring 6 is installed inside the groove.

[0027] In use, the side of the through hole 16 is provided with a bevel 41, which fits against the sealing seat 42 to seal, thereby sealing the sleeve 13 and the sealing seat 42. The first sealing ring 5 is used to seal the insertion tube 21 and the insertion hole 22, and the second sealing ring 6 is used to seal the sealing seat 42 and the bevel 41 at the end of the through hole 16, thereby improving the overall sealing effect.

[0028] Working principle: During use, the pipe seat 11 is welded to the inlet of the pressure reducing valve, and the end of the connecting pipe 12 is connected to the hydrogen pipeline. The connecting pipe 12 and the pipe seat 11 are directly connected through the pipeline connection mechanism. A sleeve 13 is slidably connected to the connecting pipe 12. The connecting pipe 12 passes through the through hole 16 at the end of the sleeve 13. The sleeve 13 and the connecting pipe 12 are connected and sealed. The sleeve 13 and the pipe seat 11 are sealed twice through the flange 14, bolts 15 and sealing element 17. This can improve the sealing effect, thereby reducing the possibility of hydrogen leakage after the pipeline connection mechanism fails, and improving the safety of hydrogen transportation.

[0029] The pipe connection mechanism includes a fixed sleeve 24, a plug rod, and a steel ball 23. The plug tube 21 is inserted into the plug hole 22 at the end of the connecting tube 12. Then, the fixed sleeve 24 is slid, and the fixed sleeve 24 moves to push the steel ball 23 to slide in the through groove. The side of the steel ball 23 is inserted into the groove 25 to connect the plug tube 21 and the connecting tube 12. The spring 3 pushes the fixed sleeve 24 to move, and the fixed sleeve 24 blocks the side of the steel ball 23 to reduce the possibility of it falling off.

[0030] In use, the side of the through hole 16 is provided with a bevel 41, which fits against the sealing seat 42 to seal, thereby sealing the sleeve 13 and the sealing seat 42. The first sealing ring 5 is used to seal the insertion tube 21 and the insertion hole 22, and the second sealing ring 6 is used to seal the sealing seat 42 and the bevel 41 at the end of the through hole 16, thereby improving the overall sealing effect.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A vehicle-mounted hydrogen supply pressure reducing valve connection structure, comprising a pipe seat (11) and a connecting pipe (12), wherein the pipe seat (11) and the connecting pipe (12) are connected by a pipe connection assembly; characterized in that: A sleeve (13) is fitted on the surface of the connecting pipe (12). A through hole (16) is opened at the end of the sleeve (13) away from the pipe seat (11). The connecting pipe (12) passes through the through hole (16) and is slidably connected to it. A flange (14) is fixedly connected to the end of the sleeve (13) and the connecting pipe (12) that are close to each other. The two flanges (14) are detachably connected by bolts (15). A sealing element (17) is installed between the two flanges (14).

2. The connection structure of the vehicle-mounted hydrogen supply pressure reducing valve according to claim 1, characterized in that: The pipe connection assembly includes a insertion tube (21), a fixing sleeve (24), and a steel ball (23). The insertion tube (21) is fixed to the end of the pipe seat (11). The end of the connecting tube (12) is provided with an insertion hole (22). The insertion tube (21) is inserted into the insertion hole (22) and slidably connected thereto. The side of the insertion hole (22) is provided with multiple through grooves. The steel ball (23) is slidably connected inside the through grooves. The fixing sleeve (24) is slidably connected to the surface of the connecting tube (12).

3. The connection structure of the vehicle-mounted hydrogen supply pressure reducing valve according to claim 2, characterized in that: A spring (3) is fixedly connected to one end of the fixed sleeve (24) away from the tube seat (11). The end of the spring (3) is fixedly connected to the connecting tube (12). The steel ball (23) is located inside the fixed sleeve (24).

4. The on-board hydrogen supply pressure reducing valve connection structure according to claim 3, characterized in that: The through hole (16) has a bevel (41) at one end near the tube seat (11). A sealing seat (42) is fixed on the surface of the connecting tube (12) at the position corresponding to the bevel (41). The sealing seat (42) is set in a conical structure.

5. The connection structure of the vehicle-mounted hydrogen supply pressure reducing valve according to claim 4, characterized in that: The end of the insertion hole (22) is equipped with a first sealing ring (5), which is located between the insertion tube (21) and the side wall of the insertion hole (22).

6. The connection structure of the vehicle-mounted hydrogen supply pressure reducing valve according to claim 5, characterized in that: The surface of the sealing seat (42) is provided with a groove, and a second sealing ring (6) is installed inside the groove.

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