A one-way valve for vehicle-mounted hydrogen supply equipment

Abstract

This utility model belongs to the field of one-way valves, specifically a one-way valve for a vehicle-mounted hydrogen supply device, including a valve body and a valve stem. The valve body has a sliding cavity inside, and a valve chamber is formed at the end of the sliding cavity. The valve stem is slidably connected to the inside of the sliding cavity. An outlet pipe is fixedly connected to the side of the valve chamber, and an inlet pipe is fixedly connected to the side of the sliding cavity. The valve stem has a through hole inside, and a through groove is formed at one end of the through hole. In use, hydrogen is injected into the sliding cavity, then passes through the through groove into the through hole, and then enters the valve chamber through the vent hole on the valve stem, before being discharged from the outlet pipe. When hydrogen flows back, a spring pulls the valve stem to move, causing the valve stem to fit against the inner wall of the valve chamber, and the end of the vent hole blocks the valve chamber, thereby cutting off the hydrogen flow channel. With this structural design, the hydrogen does not contact the spring, thus reducing the possibility of hydrogen causing contact with the elastic spring and producing a whistling sound.

Description

Technical Field

[0001] This utility model relates to the field of one-way valves, specifically a one-way valve for an on-board hydrogen supply device. Background Technology

[0002] In current technology, check valves are used to prevent backflow in hydrogen pipelines. Common check valves mainly consist of a valve body, a spring, and a plug. The plug slides inside the valve cavity of the valve body. The spring pushes the plug to cut off the hydrogen passage in the valve cavity. When the flow is forward, the gas pressure will push the spring to compress and release the plug. When the flow is reverse, the plug cuts off the hydrogen passage in the valve cavity.

[0003] However, during use, the spring inside the one-way valve used to cut off the hydrogen passage is exposed in the valve cavity, causing the spring to vibrate and produce a whistling sound under the action of airflow; therefore, a one-way valve for vehicle-mounted hydrogen supply equipment is proposed to address the above problem. 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 one-way valve for vehicle-mounted hydrogen supply equipment.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A one-way valve for a vehicle-mounted hydrogen supply device, comprising a valve body and a valve stem; a sliding cavity is provided inside the valve body, a valve chamber is provided at the end of the sliding cavity, the valve stem is slidably connected inside the sliding cavity, an outlet pipe is fixedly connected to the side of the valve chamber, an inlet pipe is fixedly connected to the side of the sliding cavity, a through hole is provided inside the valve stem, a through groove is provided at one end of the through hole, a plurality of air holes are provided at the end of the through hole near the valve chamber, a sealing seat is fixedly connected to the end of the valve chamber, the valve stem and the sealing seat are slidably connected in the middle, and a spring is installed on the side of the valve stem.

[0006] Preferably, the sliding cavity has a mounting hole at the end away from the valve cavity, and both ends of the spring are fixedly connected to supports, with the two supports respectively fixedly connected to the end of the valve stem and the end of the mounting hole.

[0007] Preferably, the valve stem has an air groove at the end away from the sliding cavity, and there are three air grooves arranged in a ring. There are also three air holes and three through grooves.

[0008] Preferably, a tapered portion is provided on the valve stem at the position corresponding to the end of the air hole, and a tapered groove is provided inside the sealing seat.

[0009] Preferably, the valve body has an installation port at the end away from the sliding cavity, and a valve cover is slidably connected to the installation port, with bolts installed between the valve cover and the valve body.

[0010] Preferably, a sealing groove is provided at the mounting port, and a sealing element is installed inside the sealing groove.

[0011] The advantages of this utility model are:

[0012] 1. This utility model, by setting a valve body, valve stem, spring, vent, through hole, and through groove, allows hydrogen to be supplied through a hydrogen pipeline connected to an inlet pipe and an outlet pipe during use. Hydrogen is injected into the sliding cavity, then passes through the through groove into the through hole, and then enters the valve cavity through the vent on the valve stem, before being discharged from the outlet pipe. When hydrogen flows back, the spring pulls the valve stem to move, causing the valve stem to fit against the inner wall of the valve cavity, and the end of the vent blocks the valve cavity, thereby cutting off the hydrogen flow channel. With the above structure, the hydrogen does not come into contact with the spring, thus reducing the occurrence of whistling caused by hydrogen contacting the elastic spring.

[0013] 2. By setting a conical part and a sealing seat, this utility model has a conical part on the valve stem during use. The valve stem enters the interior of the sealing seat and fits against the conical groove to seal, thereby sealing the end of the air hole and improving the 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 view of the valve body of this utility model;

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

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

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

[0020] In the diagram: 11. Valve body; 12. Inlet pipe; 13. Outlet pipe; 14. Sliding chamber; 15. Valve cavity; 16. Valve stem; 17. Through hole; 18. Through groove; 19. Air hole; 21. Mounting hole; 22. Spring; 23. Support; 31. Mounting port; 32. Valve cover; 33. Bolt; 4. Seal; 51. Sealing seat; 52. Conical part; 6. Air groove. 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 one-way valve for a vehicle-mounted hydrogen supply device includes a valve body 11 and a valve stem 16. The valve body 11 has a sliding cavity 14 inside, and a valve cavity 15 is formed at the end of the sliding cavity 14. The valve stem 16 is slidably connected inside the sliding cavity 14. An outlet pipe 13 is fixedly connected to the side of the valve cavity 15, and an inlet pipe 12 is fixedly connected to the side of the sliding cavity 14. The valve stem 16 has a through hole 17 inside, and a through groove 18 is formed at one end of the through hole 17. Multiple air holes 19 are formed at the end of the through hole 17 near the valve cavity 15. A sealing seat 51 is fixedly connected to the end of the valve cavity 15. The valve stem 16 and the sealing seat 51 are slidably connected at their middle portions. A spring 22 is installed on the side of the valve stem 16. A mounting hole 21 is formed at the end of the sliding cavity 14 away from the valve cavity 15. Supports 23 are fixedly connected to both ends of the spring 22, and the two supports 23 are respectively fixedly connected to the end of the valve stem 16 and the end of the mounting hole 21.

[0024] In use, the hydrogen pipeline is connected to the inlet pipe 12 and the outlet pipe 13 respectively. Hydrogen is injected into the sliding cavity 14, then passes through the through groove 18 and enters the interior of the through hole 17. After that, it enters the interior of the valve cavity 15 through the vent hole 19 of the valve stem 16, and then exits from the outlet pipe 13. When the hydrogen flows back, the spring 22 pulls the valve stem 16 to move. The valve stem 16 and the inner wall of the valve cavity 15 are in contact, and the end of the vent hole 19 blocks the valve cavity 15, thereby cutting off the hydrogen flow channel. With the above structure, the hydrogen does not come into contact with the spring 22, which can reduce the situation where the hydrogen causes the elastic spring 22 to come into contact and produce a whistling sound.

[0025] Furthermore, such as Figure 1-5 As shown, a tapered portion 52 is provided on the valve stem 16 at the position corresponding to the end of the air hole 19, and a tapered groove is provided inside the sealing seat 51; an air groove 6 is provided at the end of the valve stem 16 away from the sliding cavity 14, and three air grooves 6 are provided, which are arranged in a ring. There are also three air holes 19 and three through grooves 18.

[0026] In use, the valve stem 16 is provided with a tapered part 52. The valve stem 16 enters the interior of the sealing seat 51 and the valve stem 16 fits against the tapered groove to seal, thereby sealing the end of the vent 19 and improving the sealing effect. When hydrogen is injected, the valve stem 16 slides and moves, and the hydrogen enters the interior of the tapered groove, enters the gas groove 6 and is injected into the interior of the valve cavity 15, which facilitates the flow of hydrogen into the valve cavity 15.

[0027] Furthermore, such as Figure 1-5 As shown, the valve body 11 has an installation port 31 at the end away from the sliding cavity 14, and a valve cover 32 is slidably connected to the installation port 31. A bolt 33 is installed between the valve cover 32 and the valve body 11. A sealing groove is provided at the installation port 31, and a sealing element 4 is installed inside the sealing groove.

[0028] In use, the valve body 11 has an installation port 31 at its end. The valve cover 32 is fixed at the installation port 31 by bolts 33. The valve cover 32 is used to seal the installation port 31. The installation hole 21 is used to install the valve stem 16. A sealing groove is opened at the installation port 31. A sealing element 4 is installed in the sealing groove. The sealing element 4 is used to seal with the valve cover 32 to reduce hydrogen leakage.

[0029] Working principle: During use, the hydrogen pipeline is connected to the inlet pipe 12 and the outlet pipe 13 respectively. Hydrogen is injected into the sliding cavity 14, then passes through the through groove 18 and enters the interior of the through hole 17. After that, it enters the interior of the valve cavity 15 through the vent hole 19 of the valve stem 16, and then exits from the outlet pipe 13. When the hydrogen flows back, the spring 22 pulls the valve stem 16 to move. The valve stem 16 and the inner wall of the valve cavity 15 are in contact, and the end of the vent hole 19 blocks the valve cavity 15, thereby cutting off the hydrogen flow channel. With the above structure, the hydrogen does not come into contact with the spring 22, which can reduce the situation where the hydrogen causes the elastic spring 22 to come into contact and produce a whistling sound.

[0030] In use, the valve stem 16 is provided with a tapered part 52. The valve stem 16 enters the interior of the sealing seat 51 and the valve stem 16 fits against the tapered groove to seal, thereby sealing the end of the vent 19 and improving the sealing effect. When hydrogen is injected, the valve stem 16 slides and moves, and the hydrogen enters the interior of the tapered groove, enters the gas groove 6 and is injected into the interior of the valve cavity 15, which facilitates the flow of hydrogen into the valve cavity 15.

[0031] In use, the valve body 11 has an installation port 31 at its end. The valve cover 32 is fixed at the installation port 31 by bolts 33. The valve cover 32 is used to seal the installation port 31. The installation hole 21 is used to install the valve stem 16. A sealing groove is opened at the installation port 31. A sealing element 4 is installed in the sealing groove. The sealing element 4 is used to seal with the valve cover 32 to reduce hydrogen leakage.

[0032] 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.

[0033] 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 one-way valve for an on-board hydrogen supply device, comprising a valve body (11) and a valve stem (16); characterized in that: The valve body (11) has a sliding cavity (14) inside, and a valve cavity (15) is formed at the end of the sliding cavity (14). The valve stem (16) is slidably connected inside the sliding cavity (14). An air outlet pipe (13) is fixedly connected to the side of the valve cavity (15), and an air inlet pipe (12) is fixedly connected to the side of the sliding cavity (14). A through hole (17) is formed inside the valve stem (16). A through groove (18) is formed at one end of the through hole (17). Multiple air holes (19) are formed at the end of the through hole (17) near the valve cavity (15). A sealing seat (51) is fixedly connected to the end of the valve cavity (15). The valve stem (16) and the sealing seat (51) are slidably connected in the middle. A spring (22) is installed on the side of the valve stem (16).

2. The one-way valve for an on-board hydrogen supply device according to claim 1, characterized in that: The sliding cavity (14) has a mounting hole (21) at one end away from the valve cavity (15). Both ends of the spring (22) are fixedly connected to supports (23), and the two supports (23) are fixedly connected to the end of the valve stem (16) and the end of the mounting hole (21), respectively.

3. The one-way valve for an on-board hydrogen supply device according to claim 2, characterized in that: A tapered portion (52) is provided on the valve stem (16) and at the corresponding position of the end of the air hole (19), and a tapered groove is provided inside the sealing seat (51).

4. The one-way valve for an on-board hydrogen supply device according to claim 3, characterized in that: The valve stem (16) has an air groove (6) at one end away from the sliding cavity (14). There are three air grooves (6) arranged in a ring. There are also three air holes (19) and three through grooves (18).

5. A one-way valve for an on-board hydrogen supply device according to claim 4, characterized in that: The valve body (11) has an installation port (31) at one end away from the sliding cavity (14), and a valve cover (32) is slidably connected at the installation port (31). A bolt (33) is installed between the valve cover (32) and the valve body (11).

6. A one-way valve for an on-board hydrogen supply device according to claim 5, characterized in that: A sealing groove is provided at the installation port (31), and a sealing element (4) is installed inside the sealing groove.

Images