Hydrogen valve double-sealing structure based on temperature sensor

Abstract

The hydrogen valve double-channel sealing structure based on the temperature sensor comprises a gas cylinder, a bottle opening of the gas cylinder is sealed through a valve body, the temperature sensor is detachably installed at the end, located in the gas cylinder, of the valve body, and the temperature sensor and the valve body are sealed through a double-channel sealing assembly. The double-sealing assembly comprises a first sealing ring, a first check ring, a second sealing ring and a second check ring, the temperature sensor is arranged in the valve body in a sliding and sleeved mode to form a first sealing cavity and a second sealing cavity, and the first sealing cavity and the second sealing cavity are located in the middle and the rear end of the temperature sensor respectively. The utility model belongs to the technical field of valves, the service life of the sealing structure is more than or equal to 15 years by additionally arranging the two sealing assemblies in the valve body, the contradiction between the service life of a rubber sealing material environment and the longest service life of a vehicle-mounted hydrogen cylinder is solved, and the sealing structure has a wide market prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a double-channel sealing structure of a hydrogen valve based on a temperature sensor. Background Technique

[0002] A hydrogen fuel cell is a device that directly converts the chemical energy of hydrogen into electrical energy, and has the advantages of high efficiency, environmental protection, light weight, low noise, etc., and has become an important direction for the development of new energy vehicles. High-pressure container hydrogen storage has become the main on-vehicle hydrogen storage method for hydrogen fuel cell vehicles due to its advantages of simple structure, high hydrogen storage density, fast filling and discharging speed, etc., and on-vehicle hydrogen cylinders are the main hydrogen-carrying equipment on hydrogen fuel cell vehicles.

[0003] At present, both the hydrogen valve and the bottle mouth are made of aluminum, and the two are threadedly connected. Under the impact of high-pressure gas in the bottle thousands of times, the threads are engaged. Once the bottle valve is disassembled, it is easy to cause thread damage, that is, the gas cylinder is scrapped, resulting in huge losses. Therefore, most of the current hydrogen valves are non-detachable designs.

[0004] The current non-detachable hydrogen valve has a temperature sensor that extends deep into the gas cylinder, and the temperature sensor and the valve body are sealed by a rubber sealing ring. However, since the maximum service life of an on-vehicle hydrogen cylinder is greater than or equal to 15 years, and the environmental service life of the rubber sealing material is about 10 years, this will cause the actual service life of the on-vehicle hydrogen cylinder to end prematurely during its entire life cycle, reducing the service life of the on-vehicle hydrogen cylinder. Therefore, a double-channel sealing structure of a hydrogen valve based on a temperature sensor is designed. Content of the Utility Model

[0005] Therefore, the utility model provides a double-channel sealing structure of a hydrogen valve based on a temperature sensor to solve the above problems in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-channel sealing structure of a hydrogen valve based on a temperature sensor, including a gas cylinder, the bottle mouth of the gas cylinder is sealed by a valve body, one end of the valve body located inside the gas cylinder is detachably installed with a temperature sensor, and the temperature sensor and the valve body are sealed by a double-channel sealing component;

[0008] The double-channel sealing component includes a first sealing ring, a first retaining ring, a second sealing ring, and a second retaining ring. The temperature sensor is slidably sleeved inside the valve body and forms a first sealing cavity and a second sealing cavity. The first sealing cavity and the second sealing cavity are respectively located in the middle and the rear end of the temperature sensor. The first sealing ring and the first retaining ring are both slidably sleeved in the middle of the temperature sensor and are arranged in the first sealing cavity. The second sealing ring and the second retaining ring are both slidably sleeved at the rear end of the temperature sensor and are arranged in the first sealing cavity.

[0009] As a further optimized solution of the present utility model, an installation hole for installing a temperature sensor is provided inside the valve body. The middle and rear ends of the temperature sensor are clamped and sleeved in the installation hole. A pressing plate is slidably sleeved on the front end of the temperature sensor, and the pressing plate is fixed to the valve body by screws.

[0010] As a further optimized solution of the present utility model, the axes of the gas cylinder, the temperature sensor, and the installation hole coincide.

[0011] As a further optimized solution of the present utility model, the gap between the temperature sensor and the pressing plate is responsible for communicating the inner cavity of the gas cylinder with the first sealing cavity.

[0012] As a further optimized solution of the present utility model, the gap between the outer wall of the middle part of the temperature sensor and the inner wall of the installation hole is responsible for communicating the first sealing cavity with the second sealing cavity.

[0013] As a further optimized solution of the present utility model, both the first sealing cavity and the second sealing cavity are annular cavities and are arranged around the axis of the temperature sensor.

[0014] As a further optimized solution of the present utility model, the first sealing ring is arranged on the side of the first retaining ring close to the inner cavity of the gas cylinder. The first retaining ring is arranged on the side of the first sealing cavity away from the inner cavity of the gas cylinder, and the superimposed thickness of the first sealing ring and the first retaining ring is less than the depth of the first sealing cavity.

[0015] As a further optimized solution of the present utility model, the second sealing ring is arranged on the side of the second retaining ring close to the inner cavity of the gas cylinder. The second retaining ring is arranged on the side of the first sealing cavity away from the inner cavity of the gas cylinder, and the superimposed thickness of the second sealing ring and the second retaining ring is less than the depth of the second sealing cavity.

[0016] As a further optimized solution of the present utility model, the valve body and the bottle mouth of the gas cylinder are connected by threads and sealed by a gas cylinder sealing ring.

[0017] As a further optimized solution of the present utility model, the valve body has a main hydrogen charging and discharging channel, and the axis of the main hydrogen charging and discharging channel is parallel to the axis of the gas cylinder.

[0018] The present utility model has the following advantages:

[0019] During use, hydrogen in the gas cylinder enters the first sealing cavity through the gap between the pressing plate and the temperature sensor and contacts the first sealing ring. Under the pressure of hydrogen, the first sealing ring is pushed towards the first retaining ring, causing the first sealing ring and the first retaining ring to be mutually extruded to form a first seal in the first sealing cavity. When the first sealing ring fails due to the natural properties of the material, the first seal fails, and hydrogen enters the second sealing cavity through the gap between the temperature sensor and the inner wall of the mounting hole and contacts the second sealing ring. Under the pressure of hydrogen, the second sealing ring is pushed towards the second retaining ring, causing the second sealing ring and the second retaining ring to be mutually extruded to form a second seal in the second sealing cavity. With such a design, the service life of this sealing structure is greater than or equal to 15 years, thereby extending the actual service life of the on-vehicle hydrogen cylinder, and further solving the contradiction between the environmental service life of the rubber sealing material and the maximum service life of the on-vehicle hydrogen cylinder, having broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of a double-sealing structure of a hydrogen valve based on a temperature sensor provided by the present utility model;

[0021] Figure 2 FIG. is an installation schematic diagram of double sealing rings of a double-sealing structure of a hydrogen valve based on a temperature sensor provided by the present utility model.

[0022] In the figure: 1, gas cylinder; 2, temperature sensor; 3, screw; 4, pressing plate; 5, valve body; 6, first sealing ring; 7, first retaining ring; 8, second sealing ring; 9, second retaining ring; 10, gas cylinder sealing ring; 11, first sealing cavity; 12, second sealing cavity; 13, main hydrogen charging and discharging channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following specific embodiments illustrate the embodiments of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0024] As Figure 1 shown, a double-sealing structure of a hydrogen valve based on a temperature sensor includes a gas cylinder 1. The mouth of the gas cylinder 1 is sealed through a valve body 5. One end of the valve body 5 located inside the gas cylinder 1 is detachably installed with a temperature sensor 2, and the temperature sensor 2 and the valve body 5 are sealed through a double-sealing component;

[0025] The double - seal assembly includes a first sealing ring 6, a first retaining ring 7, a second sealing ring 8, and a second retaining ring 9. The temperature sensor 2 is slidably sleeved inside the valve body 5 to form a first sealing cavity 11 and a second sealing cavity 12. The first sealing cavity 11 and the second sealing cavity 12 are respectively located in the middle and the rear end of the temperature sensor 2. The first sealing ring 6 and the first retaining ring 7 are both slidably sleeved in the middle of the temperature sensor 2 and are arranged in the first sealing cavity 11. The second sealing ring 8 and the second retaining ring 9 are both slidably sleeved at the rear end of the temperature sensor 2 and are arranged in the second sealing cavity 12;

[0026] Through the design of the double - seal assembly, the gap between the temperature sensor 2 and the valve body 5 can be double - sealed, thereby extending the sealing life, so that the gas cylinder 1 is not separated from the valve body 5 as much as possible during its entire life cycle, thus avoiding damage to the installation thread structure.

[0027] Specifically, an installation hole for installing the temperature sensor 2 is opened inside the valve body 5. The middle and the rear end of the temperature sensor 2 are snap - sleeved in the installation hole. A pressure plate 4 is slidably sleeved at the front end of the temperature sensor 2, and the pressure plate 4 is fixed to the valve body 5 by screws 3;

[0028] The axes of the gas cylinder 1, the temperature sensor 2, and the installation hole coincide. The gap between the temperature sensor 2 and the pressure plate 4 is responsible for connecting the inner cavity of the gas cylinder 1 and the first sealing cavity 11. The gap between the outer wall of the middle part of the temperature sensor 2 and the inner wall of the installation hole is responsible for connecting the first sealing cavity 11 and the second sealing cavity 12. Both the first sealing cavity 11 and the second sealing cavity 12 are annular cavities and are arranged around the axis of the temperature sensor 2, so that when hydrogen enters, the first sealing ring 6 and the second sealing ring 8 can be evenly pushed;

[0029] Furthermore, a sleeve hole is opened in the middle of the pressure plate 4. The diameter of the sleeve hole is slightly larger than the outer diameter of the front end of the temperature sensor 2, so that the pressure plate 4 can be slidably sleeved on the front end of the temperature sensor 2 through the sleeve hole. The outer circumference of the temperature sensor 2 has an annular protrusion. The annular protrusion is located at the inner opening of the installation hole, and there is an annular gap between the outer circumference of the annular protrusion and the inner wall of the opening of the installation hole. The pressure plate 4 has an annular clamping block on the side close to the valve body 5. When the pressure plate 4 is fixed to the valve body 5 by screws 3, the annular clamping block is inserted into the annular gap. Combined with the snap - connection of the rear end of the temperature sensor 2 and the installation hole, the installation of the temperature sensor 2 is realized stably;

[0030] Furthermore, as Figure 2 shown, to avoid excessive stretching of the sealing ring and plastic deformation of the retaining ring during the installation process, it is required that the first retaining ring 7 and the first sealing ring 6 are installed from right to left in sequence, and the second sealing ring 8 and the second retaining ring 9 are installed from left to right in sequence, that is, the first retaining ring 7 and the first sealing ring 6 are installed according to the direction specified by arrow A, and the second sealing ring 8 and the second retaining ring 9 are installed on the temperature sensor 2 according to the direction specified by arrow B.

[0031] Specifically, as Figure 1 shown, the first sealing ring 6 is arranged on one side of the first retaining ring 7 close to the inner cavity of the gas cylinder 1, the first retaining ring 7 is arranged on one side of the first sealing cavity 11 away from the inner cavity of the gas cylinder 1, and the superposition thickness of the first sealing ring 6 and the first retaining ring 7 is less than the depth of the first sealing cavity 11, so as to form a first pushing area on one side of the first sealing cavity 11 close to the inner cavity of the gas cylinder 1. When hydrogen enters the first pushing area, the first sealing ring 6 will be pushed towards the first retaining ring 7 and extruded to form a first seal.

[0032] Specifically, as Figure 1 shown, the second sealing ring 8 is arranged on one side of the second retaining ring 9 close to the inner cavity of the gas cylinder 1, the second retaining ring 9 is arranged on one side of the first sealing cavity 11 away from the inner cavity of the gas cylinder 1, and the superposition thickness of the second sealing ring 8 and the second retaining ring 9 is less than the depth of the second sealing cavity 12, so as to form a second pushing area on one side of the second sealing cavity 12 close to the inner cavity of the gas cylinder 1. When hydrogen enters the second pushing area, the second sealing ring 8 will be pushed towards the second retaining ring 9 and extruded to form a second seal.

[0033] Specifically, as Figure 1 shown, the valve body 5 and the mouth of the gas cylinder 1 are connected by threads and sealed by the gas cylinder sealing ring 10. The inner wall of the mouth of the gas cylinder 1 has internal threads, and the mouth end face has a groove for accommodating the gas cylinder sealing ring 10. The outer wall of the front end of the valve body 5 has external threads and is threadedly connected to the inner wall of the mouth of the gas cylinder 1. The rear end cover of the valve body 5 presses on the mouth end face of the gas cylinder 1 and contacts the gas cylinder sealing ring 10, thus forming a seal.

[0034] Specifically, as Figure 1 shown, the valve body 5 has a main hydrogen charging and discharging channel 13, and the axis of the main hydrogen charging and discharging channel 13 is parallel to the axis of the gas cylinder 1. The open end of the main hydrogen charging and discharging channel 13 located outside the valve body 5 has a corresponding valve for recharging hydrogen to the gas cylinder 1.

[0035] It should be noted that both the first sealing ring 6 and the second sealing ring 8 are conventional rubber sealing materials in the prior art. The first sealing ring 6 can be used in a hydrogen-related environment for more than 10 years, and the second sealing ring 8 can be stored in a natural environment for more than 10 years without significant attenuation of material properties and can be applied to a hydrogen-related environment.

[0036] During use, hydrogen in the gas cylinder 1 enters the first sealing cavity 11 through the gap between the pressing plate 4 and the temperature sensor 2 and comes into contact with the first sealing ring 6. Under the pressure of hydrogen, the first sealing ring 6 is pushed towards the first retaining ring 7, causing the first sealing ring 6 and the first retaining ring 7 to be mutually extruded to form a first seal in the first sealing cavity 11. When the first sealing ring 6 fails due to the natural properties of the material, the first seal fails. Hydrogen then enters the second sealing cavity 12 through the gap between the temperature sensor 2 and the inner wall of the mounting hole and comes into contact with the second sealing ring 8. Under the pressure of hydrogen, the second sealing ring 8 is pushed towards the second retaining ring 9, causing the second sealing ring 8 and the second retaining ring 9 to be mutually extruded to form a second seal in the second sealing cavity 12. With such a design, the service life of this sealing structure is greater than or equal to 15 years, thereby extending the actual service life of the on-vehicle hydrogen cylinder, and further resolving the contradiction between the environmental service life of the rubber sealing material and the maximum service life of the on-vehicle hydrogen cylinder, presenting a broad market prospect.

Claims

1. A double-channel sealing structure for a hydrogen valve based on a temperature sensor, comprising a gas cylinder (1), characterized in that, The mouth of the gas cylinder (1) is sealed by a valve body (5). One end of the valve body (5) located inside the gas cylinder (1) is detachably installed with a temperature sensor (2), and a double-channel sealing assembly is used for sealing between the temperature sensor (2) and the valve body (5). The double-channel sealing assembly includes a first sealing ring (6), a first retaining ring (7), a second sealing ring (8), and a second retaining ring (9). The temperature sensor (2) is slidably sleeved inside the valve body (5) to form a first sealing cavity (11) and a second sealing cavity (12). The first sealing cavity (11) and the second sealing cavity (12) are respectively located in the middle and the rear end of the temperature sensor (2). The first sealing ring (6) and the first retaining ring (7) are both slidably sleeved in the middle of the temperature sensor (2) and arranged in the first sealing cavity (11). The second sealing ring (8) and the second retaining ring (9) are both slidably sleeved at the rear end of the temperature sensor (2) and arranged in the first sealing cavity (11).

2. The double-channel sealing structure of the hydrogen valve based on the temperature sensor according to claim 1, wherein, An installation hole for installing the temperature sensor (2) is formed inside the valve body (5). The middle and the rear end of the temperature sensor (2) are snap-fitted and sleeved inside the installation hole. A pressing plate (4) is slidably sleeved at the front end of the temperature sensor (2), and the pressing plate (4) is fixed to the valve body (5) by screws (3).

3. A dual-channel sealing structure for a hydrogen valve based on a temperature sensor according to claim 2, characterized in that, The axes of the gas cylinder (1), the temperature sensor (2), and the installation hole coincide.

4. A double-channel sealing structure for a hydrogen valve based on a temperature sensor according to claim 2, characterized in that, The gap between the temperature sensor (2) and the pressing plate (4) is responsible for communicating the inner cavity of the gas cylinder (1) with the first sealing cavity (11).

5. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to claim 2, characterized in that, The gap between the outer wall of the middle part of the temperature sensor (2) and the inner wall of the installation hole is responsible for communicating the first sealing cavity (11) with the second sealing cavity (12).

6. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to claim 1, characterized in that, Both the first sealing cavity (11) and the second sealing cavity (12) are annular cavities and are arranged around the axis of the temperature sensor (2).

7. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to claim 1, characterized in that, The first sealing ring (6) is arranged on the side of the first retaining ring (7) close to the inner cavity of the gas cylinder (1). The first retaining ring (7) is arranged on the side of the first sealing cavity (11) far from the inner cavity of the gas cylinder (1), and the superimposed thickness of the first sealing ring (6) and the first retaining ring (7) is less than the depth of the first sealing cavity (11).

8. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to claim 1, characterized in that, The second sealing ring (8) is arranged on the side of the second retaining ring (9) close to the inner cavity of the gas cylinder (1). The second retaining ring (9) is arranged on the side of the first sealing cavity (11) far from the inner cavity of the gas cylinder (1), and the superimposed thickness of the second sealing ring (8) and the second retaining ring (9) is less than the depth of the second sealing cavity (12).

9. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to claim 1, characterized in that The valve body (5) and the mouth of the gas cylinder (1) are connected by threads and sealed by a gas cylinder sealing ring (10).

10. A double-channel sealing structure of a hydrogen valve based on a temperature sensor according to any one of claims 1-9, characterized in that, A main hydrogen charging and discharging channel (13) is provided inside the valve body (5), and the axis of the main hydrogen charging and discharging channel (13) is parallel to the axis of the gas cylinder (1).

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