Sealing unit and finish valve

Abstract

The present application relates to the technical field of valve, and provides a sealing unit and a bottle mouth valve. The sealing unit of the present application is applied to the bottle mouth valve, the bottle mouth valve comprising a valve body, a first wire harness and a temperature sensor; the valve body has a wire harness setting hole; the sealing unit is sealingly arranged in the wire harness setting hole to block the wire harness setting hole, and the sealing unit is temperature-resistant and pressure-resistant; the first wire harness is located in the wire harness setting hole and is electrically connected to the sealing unit; the temperature sensor is electrically connected to the first wire harness through the sealing unit and is used for detecting the temperature of the gas in the gas storage cylinder in the state that the bottle mouth valve is arranged at the bottle mouth of the gas storage cylinder. The technical problem of the damage of the valve body caused by the sintering fixing agent in the prior art is solved, and the technical problem of the poor sealing of the bottle mouth valve caused by the poor pressure resistance and low temperature resistance of the expansion sleeve in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to a sealing unit and a bottle neck valve. Background Technology

[0002] Fuel cell electric vehicles (FCEVs) include fuel cell stacks and onboard gaseous hydrogen storage systems.

[0003] Fuel cell stacks convert hydrogen and oxygen into electrical energy and water vapor through electrochemical reactions to power vehicles. This process produces water and does not emit harmful substances, thus achieving zero-emission driving.

[0004] The on-board gaseous hydrogen storage system is used to store and supply sufficient hydrogen to the fuel cell stack for reaction. The system mainly includes a hydrogen storage cylinder and a valve. The storage cylinder has a neck; the valve is located at the neck of the storage cylinder; the valve includes a valve body, a temperature sensor, and a wiring harness. The valve body, located at the neck of the storage cylinder, controls the entry and exit of hydrogen. The valve body has a wiring harness mounting hole. The temperature sensor is located on the valve body and detects the temperature of the hydrogen inside the storage cylinder. The wiring harness is located within the mounting hole and is electrically connected to the temperature sensor. There is a gap between the sidewall of the wiring harness and the wall of the mounting hole. To ensure sealing, two methods are typically used: the first method is to fill the gap with a fixing agent made of plexiglass, and the gap is sealed by sintering the fixing agent; the second method is to fit a rubber expansion sleeve over the wiring harness, allowing the wiring harness to seal against the wall of the mounting hole.

[0005] However, for the first method, since the valve body is usually made of metal, the metal valve body is prone to hydrogen embrittlement during the sintering of the fixing agent, which can cause damage to the valve body. For the second method, since the expansion sleeve is usually made of rubber, the rubber expansion sleeve cannot meet the pressure requirements of, for example, 35 MPa. In addition, the rubber expansion sleeve has a large shrinkage rate below -40 degrees Celsius, which affects the sealing performance of the aforementioned gaps. Summary of the Invention

[0006] This invention provides a sealing unit and a bottle neck valve to solve the problem of valve body damage caused by sintering fixative in the prior art, and to solve the technical problem of poor sealing performance of bottle neck valve caused by the expansion sleeve's inability to withstand pressure and low temperature in the prior art.

[0007] The present invention also provides a sealing unit for use in a bottle neck valve. The bottle neck valve includes a valve body, a first wiring harness, and a temperature sensor. The valve body has a wiring harness mounting hole. The sealing unit is sealed within the wiring harness mounting hole to block the mounting hole. The sealing unit is temperature and pressure resistant. The first wiring harness is located within the wiring harness mounting hole and is electrically connected to the sealing unit. The temperature sensor is electrically connected to the first wiring harness through the sealing unit and is used to detect the temperature of the gas in the gas storage bottle when the bottle neck valve is set at the bottle neck of the gas storage bottle.

[0008] According to one embodiment of the present invention, the sealing unit divides the wire harness mounting hole into a first hole segment and a second hole segment; the bottle valve further includes a second wire harness; the first wire harness is located in the first hole segment; the second wire harness is located in the second hole segment; the temperature sensor is electrically connected to the end of the first wire harness sequentially through the second wire harness and the sealing unit.

[0009] According to one embodiment of the present invention, the sealing unit includes a high and low temperature resistant insulation mechanism and a conductive metal mechanism; the high and low temperature resistant insulation mechanism is disposed around the conductive metal mechanism and is sealed to the wall of the wire harness mounting hole; the high and low temperature resistant insulation mechanism has a channel; the channel has a first channel opening and a second channel opening; the first channel opening passes through a first hole segment; the second channel opening passes through a second hole segment; the conductive metal mechanism is sealed and inserted into the channel; the temperature sensor is electrically connected to the end of the first wire harness in sequence through the second wire harness and the conductive metal mechanism.

[0010] According to one embodiment of the present invention, the conductive metal mechanism includes a conductive structure and at least one embedded structure; the embedded structure is disposed around the outer peripheral wall of the conductive structure; the conductive structure is embedded in a channel through the embedded structure; the temperature sensor is electrically connected to the end of the first wire harness in sequence through the second wire harness and the conductive structure.

[0011] According to one embodiment of the present invention, the outer diameter of the embedded structure is gradually increased along the extension direction of the channel.

[0012] According to one embodiment of the present invention, a clamping mechanism is further included, located in the second hole section, and abutting against the high and low temperature resistant insulation mechanism and the conductive metal mechanism.

[0013] According to one embodiment of the present invention, the temperature sensor includes a bracket, a temperature sensing element, and a lead wire; the bracket is disposed on a clamping mechanism; the temperature sensing element is disposed on the bracket and electrically connected to a second wiring harness via the lead wire; wherein, when the bottle valve is disposed at the bottle opening of the gas storage bottle, the temperature sensing element is located inside the gas storage bottle.

[0014] According to one embodiment of the present invention, the high and low temperature resistant insulation mechanism is a structural component made of polyetheretherketone, polyimide, or polychlorotrifluoroethylene. The high and low temperature resistant insulation mechanism includes a sealing substrate and a retaining ring. The sealing substrate is sealed and disposed within the wire harness mounting hole and is disposed around the conductive metal mechanism. A channel is disposed on the sealing substrate. The wall of the wire harness mounting hole has a receiving hole coaxially disposed with the wire harness mounting hole. The retaining ring is sealed and disposed within the receiving hole and is disposed around the sealing substrate.

[0015] According to one embodiment of the present invention, the high and low temperature resistant insulation mechanism further includes a sealing ring, which is sealed within the receiving hole, surrounds the sealing substrate, and is located at the end of the retaining ring.

[0016] The present invention also provides a bottle neck valve, comprising: a sealing unit as described in the above embodiments; a valve body; a first wiring harness; and a temperature sensor.

[0017] The features and advantages of the sealing unit and bottle valve of the present invention are as follows:

[0018] The sealing unit provided by this invention solves the problems existing in the bottle neck valve of the on-board gaseous hydrogen storage system of fuel cell vehicles in the prior art, specifically in the following ways:

[0019] To address the valve body damage caused by sealing the gap between the wire harness and the valve body using a sintering fixative, the sealing unit of this invention directly seals the wire harness mounting hole in the valve body, avoiding the use of a sintering fixative. This effectively prevents the risk of hydrogen embrittlement caused by high-temperature sintering to the metal valve body, thereby greatly reducing the possibility of valve body damage due to hydrogen embrittlement and enhancing the structural stability and service life of the bottle valve.

[0020] In response to the problems of poor high-pressure and low-temperature performance of traditional sealing methods using rubber expansion sleeves, the sealing unit of the present invention has temperature and pressure resistance characteristics, can maintain good sealing performance under high pressure environment, and can maintain stable size and shape, and will not cause sealing failure due to material shrinkage, thereby significantly improving the sealing performance and reliability of bottle valve under various working conditions.

[0021] By effectively connecting the first wiring harness and the temperature sensor, the temperature sensor can accurately detect the gas temperature inside the hydrogen storage tank, thereby improving the safety and operating efficiency of the entire on-board gaseous hydrogen storage system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a partial structural schematic diagram of the bottle valve of the present invention.

[0024] Figure 2 This is an enlarged view of the sealing unit.

[0025] Figure label:

[0026] 100. Sealing unit; 110. High and low temperature resistant insulation mechanism; 101. Sealing substrate; 102. Channel; 1021. First channel opening; 1022. Second channel opening; 103. Retaining ring; 104. Sealing ring; 120. Conductive metal mechanism; 121. Conductive structure; 122. Embedded structure; 130. Pressing mechanism; 131. Pressure cap; 132. Stop ring; 133. Nut; 200. Valve body; 210. Wire harness mounting hole; 211. First hole segment; 212. Second hole segment; 220. Accommodation hole; 300. First wire harness; 400. Temperature sensor; 500. Second wire harness. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this embodiment.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0031] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] Figures 1 to 2 The sealing unit 100 and bottle neck valve provided by the present invention are shown. As can be seen from the figure, the sealing unit 100 of the present invention is applied to the bottle neck valve, which includes a valve body 200, a first wiring harness 300, and a temperature sensor 400. The valve body 200 has a wiring harness mounting hole 210. The sealing unit 100 is sealed and disposed in the wiring harness mounting hole 210 to block the wiring harness mounting hole 210. The sealing unit 100 is heat and pressure resistant. The first wiring harness 300 is located in the wiring harness mounting hole 210 and is electrically connected to the sealing unit 100. The temperature sensor 400 is electrically connected to the first wiring harness 300 through the sealing unit 100 and is used to detect the temperature of the gas in the gas storage bottle when the bottle neck valve is set at the bottle neck of the gas storage bottle.

[0033] The sealing unit 100 provided by this invention solves the problems existing in the bottle valve of the on-board gaseous hydrogen storage system of fuel cell vehicles in the prior art, specifically in the following ways:

[0034] To address the problem of valve body 200 damage caused by sealing the gap between the wire harness and valve body 200 using a sintering fixative, the sealing unit 100 of the present invention directly seals the gap within the wire harness mounting hole 210 of the valve body 200, avoiding the use of a sintering fixative. This effectively prevents the risk of hydrogen embrittlement caused by high-temperature sintering to the metal valve body 200, thereby greatly reducing the possibility of valve body 200 being damaged by hydrogen embrittlement and enhancing the structural stability and service life of the bottle valve.

[0035] In view of the problems of poor high pressure resistance and poor low temperature performance of the traditional method of sealing by rubber expansion sleeve, the sealing unit 100 of the present invention has temperature and pressure resistance characteristics, can maintain good sealing performance under high pressure environment, and can maintain stable size and shape, and will not cause sealing failure due to material shrinkage, thereby significantly improving the sealing performance and reliability of bottle valve under various working conditions.

[0036] By effectively connecting the first wiring harness 300 and the temperature sensor 400, the temperature sensor 400 can accurately detect the gas temperature inside the hydrogen storage tank, thereby improving the safety and operating efficiency of the entire on-board gaseous hydrogen storage system.

[0037] In this embodiment, temperature and pressure resistance can refer to resistance to high temperature, low temperature and high pressure; high temperature can be above 200 degrees Celsius; low temperature can be below -40 degrees Celsius; high pressure can be 35 MPa.

[0038] According to one embodiment of the present invention, the sealing unit 100 divides the wire harness mounting hole 210 into a first hole segment 211 and a second hole segment 212; the bottle valve also includes a second wire harness 500; the first wire harness 300 is located in the first hole segment 211; the second wire harness 500 is located in the second hole segment 212; the temperature sensor 400 is electrically connected to the end of the first wire harness 300 in sequence through the second wire harness 500 and the sealing unit 100.

[0039] In practice, by dividing its internal space into the first hole segment 211 and the second hole segment 212, the first wire harness 300 and the newly added second wire harness 500 are successfully accommodated and isolated, effectively organizing the distribution structure of the wire harness and enhancing the flexibility of the circuit design.

[0040] According to one embodiment of the present invention, the sealing unit 100 includes a high and low temperature resistant insulation mechanism 110 and a conductive metal mechanism 120; the high and low temperature resistant insulation mechanism 110 is disposed around the conductive metal mechanism 120 and is sealed to the wall of the wire harness mounting hole 210; the high and low temperature resistant insulation mechanism 110 has a channel 102; the channel 102 has a first channel opening 1021 and a second channel opening 1022; the first channel opening 1021 passes through a first hole segment 211; the second channel opening 1022 passes through a second hole segment 212; the conductive metal mechanism 120 is sealed and inserted into the channel 102; the temperature sensor 400 is sequentially electrically connected to the end of the first wire harness 300 through the second wire harness 500 and the conductive metal mechanism 120.

[0041] In practical implementation, the high and low temperature resistant insulation mechanism 110 fits tightly against the wall of the wire harness mounting hole 210 in the valve body 200, forming an excellent sealing effect. The conductive metal mechanism 120 is sealed and embedded in the channel 102, serving as a key bridge for signal transmission. This ensures that the temperature sensor 400 can smoothly connect to the end of the first wire harness 300 through the second wire harness 500, enhancing the overall electrical performance and environmental adaptability.

[0042] In this embodiment, the conductive metal mechanism 120 can be a structural component made of brass to ensure sealing performance under high temperature, low temperature and high pressure environments.

[0043] According to one embodiment of the present invention, the conductive metal mechanism 120 includes a conductive structure 121 and at least one embedded structure 122; the embedded structure 122 is disposed around the outer peripheral wall of the conductive structure 121; the conductive structure 121 is embedded in the channel 102 through the embedded structure 122; the temperature sensor 400 is sequentially electrically connected to the end of the first wire harness 300 through the second wire harness 500 and the conductive structure 121.

[0044] In practical implementation, this design allows the conductive structure 121 to be firmly embedded within the channel 102 of the high and low temperature resistant insulation mechanism 110, further enhancing the electrical connection strength and stability within the sealing unit 100. The temperature sensor 400 relies on this conductive structure 121 to precisely transmit signals to the end of the first wire harness 300 through the second wire harness 500, ensuring a safe and reliable electrical connection.

[0045] According to one embodiment of the present invention, the outer diameter of the embedded structure 122 is gradually increased along the extension direction of the channel 102.

[0046] In practice, such structural optimization helps to increase the clamping force between the conductive metal mechanism 120 and the high and low temperature resistant insulation mechanism 110, thereby maintaining a stable contact state under high pressure and high and low temperature changes, effectively preventing electrical connection loosening, and improving the overall pressure resistance and weather resistance of the sealing unit 100.

[0047] According to one embodiment of the present invention, a clamping mechanism 130 is further included, located in the second hole section 212, and abuts against the high and low temperature resistant insulation mechanism 110 and the conductive metal mechanism 120.

[0048] In practice, the mechanism is located in the second hole section 212 and acts on the end of the high and low temperature resistant insulation mechanism 110 and the conductive metal mechanism 120. By applying appropriate pressure, it ensures a tight fit and prevents displacement or loosening under various working conditions, thereby ensuring the stability of the overall structure of the sealing unit 100 and the reliability of the electrical connection.

[0049] According to one embodiment of the present invention, the clamping mechanism 130 includes a pressure cap 131, a stop ring 132, and a nut 133 arranged sequentially along the direction from the first channel opening 1021 to the second channel opening 1022; the pressure cap 131 is disposed around the conductive metal mechanism 120 and abuts against the end of the high and low temperature resistant insulation mechanism 110 and the end of the conductive metal mechanism 120; the stop ring 132 abuts against the end of the pressure cap 131 and is disposed around the conductive metal mechanism 120, and the stop ring 132 has a first wire hole; the nut 133 abuts against the end of the stop ring 132 and is screwed to the valve body 200, and the nut 133 has a second wire hole communicating with the first wire hole.

[0050] In practice, a combination design of gland 131, stop ring 132 and nut 133 is adopted. The various components work together to ensure reliable connection and fastening between sealing unit 100 and valve body 200, and facilitate disassembly and maintenance, thereby improving the overall ease of operation and safety of the device.

[0051] According to one embodiment of the present invention, the temperature sensor 400 includes a bracket, a temperature sensing element (e.g., a thermocouple), and a lead wire; the bracket is disposed on a clamping mechanism 130 (e.g., a nut 133); the temperature sensing element is disposed on the bracket and electrically connected to a second wiring harness 500 via the lead wire; wherein, when the valve is disposed at the mouth of the gas storage bottle, the temperature sensing element is located inside the gas storage bottle.

[0052] In practice, the bracket is fixed on the clamping mechanism 130 to ensure that the temperature sensor 400 is fixed in position; the temperature sensing element is placed on the bracket and connected to the second wiring harness 500 through the lead wire. When the bottle valve is installed at the mouth of the gas storage bottle, the temperature sensing element can penetrate into the inside of the gas storage bottle to measure the gas temperature in the hydrogen storage bottle in real time and accurately, thereby improving the monitoring efficiency of the system.

[0053] According to one embodiment of the present invention, the high and low temperature resistant insulation mechanism 110 is a structural component made of polyetheretherketone, polyimide, or polychlorotrifluoroethylene. The high and low temperature resistant insulation mechanism 110 includes a sealing substrate 101 and a retaining ring 103. The sealing substrate 101 is sealed and disposed within the wire harness mounting hole 210 and is disposed around the conductive metal mechanism 120. A channel 102 is disposed on the sealing substrate 101. The hole wall of the wire harness mounting hole 210 has a receiving hole 220 coaxially disposed with the wire harness mounting hole 210. The retaining ring 103 is sealed and disposed within the receiving hole 220 and is disposed around the sealing substrate 101.

[0054] In practical implementation, high-performance materials such as polyetheretherketone, polyimide, or polychlorotrifluoroethylene are used to ensure that it maintains good insulation and sealing performance even under extreme temperature environments. The high and low temperature resistant insulation mechanism 110 can be composed of two parts: a sealing substrate 101 and a retaining ring 103. The sealing substrate 101 is fitted into the wire harness mounting hole 210 of the valve body 200 and is arranged around the conductive metal mechanism 120. The channel 102 is cleverly opened inside the sealing substrate 101. The valve body 200 has a receiving hole 220 coaxial with the wire harness mounting hole 210 on the hole wall. The retaining ring 103 is sealed in the receiving hole 220 and surrounds the sealing substrate 101. This multi-seal design further enhances the overall protective effect of the sealing unit 100.

[0055] In this embodiment, the sealing substrate 101 may be a structural component made of polyetheretherketone, polyimide or polychlorotrifluoroethylene.

[0056] According to one embodiment of the present invention, the high and low temperature resistant insulation mechanism 110 further includes a sealing ring 104, which is sealed within the receiving hole 220, surrounds the sealing base 101, and is located at the end of the retaining ring 103.

[0057] In specific implementation, a sealing ring 104 is added and sealed within the receiving hole 220, surrounding the sealing base 101 and located at the end of the retaining ring 103, further improving the anti-leakage mechanism of the sealing unit 100 and enhancing its sealing performance and durability.

[0058] According to one embodiment of the present invention, the device may further include a plunger, a rubber plug, and an electrical connector. The plunger and the rubber plug are disposed within the first hole section 211 and located at the end of the first hole section 211. The plunger and the rubber plug are arranged sequentially along the direction from the first channel opening 1021 to the second channel opening 1022. The plunger and the rubber plug are sleeved on the first wire harness 300. The first wire harness 300 is sealed to the hole wall of the first hole section 211 by the plunger and the rubber plug, respectively, to prevent external moisture and impurities from entering the valve body. The electrical connector is located outside the wire harness mounting hole and is disposed at the end of the first hole section 211, and is electrically connected to the end of the first wire harness 300.

[0059] The present invention also provides a bottle neck valve, comprising: a sealing unit 100, a valve body 200, a first wiring harness 300, and a temperature sensor 400 as described in the above embodiments. The specific structure, working principle, and beneficial effects of the bottle neck valve are the same as those in the above embodiments, and will not be repeated here.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing unit, characterized in that, Applied to a bottle neck valve, the bottle neck valve includes a valve body (200), a first wiring harness (300), and a temperature sensor (400). The valve body (200) has a wire harness mounting hole (210); The sealing unit is sealed inside the wire harness mounting hole (210) to block the wire harness mounting hole (210), and the sealing unit is heat and pressure resistant; The first wire harness (300) is located inside the wire harness mounting hole (210) and is electrically connected to the sealing unit; The temperature sensor (400) is electrically connected to the first wiring harness (300) through the sealing unit, and is used to detect the temperature of the gas in the gas storage bottle when the bottle valve is set at the bottle mouth of the gas storage bottle. The sealing unit divides the wire harness setting hole (210) into a first hole segment (211) and a second hole segment (212). The bottle valve also includes a second wiring harness (500). The first wire harness (300) is located within the first hole segment (211); The second wire harness (500) is located within the second hole segment (212); The temperature sensor (400) is electrically connected in sequence to the end of the first wire harness (300) via the second wire harness (500) and the sealing unit; The sealing unit includes a high and low temperature resistant insulation mechanism (110) and a conductive metal mechanism (120). The high and low temperature resistant insulation mechanism (110) is arranged around the conductive metal mechanism (120) and is sealed to the wall of the wire harness mounting hole (210). The high and low temperature resistant insulation mechanism (110) has a channel (102); the channel (102) has a first channel opening (1021) and a second channel opening (1022); the first channel opening (1021) passes through the first hole segment (211); the second channel opening (1022) passes through the second hole segment (212). The conductive metal mechanism (120) is sealed and passes through the channel (102); The temperature sensor (400) is sequentially electrically connected to the end of the first wire harness (300) via the second wire harness (500) and the conductive metal mechanism (120).

2. The sealing unit according to claim 1, characterized in that, The conductive metal structure (120) includes a conductive structure (121) and at least one embedded structure (122). The embedded structure (122) is disposed around the outer peripheral wall of the conductive structure (121); The conductive structure (121) is embedded in the channel (102) through the embedded structure (122); The temperature sensor (400) is electrically connected in sequence to the end of the first wire harness (300) via the second wire harness (500) and the conductive structure (121).

3. The sealing unit according to claim 2, characterized in that, The outer diameter of the embedded structure (122) is gradually increased along the extension direction of the channel (102).

4. The sealing unit according to claim 1, characterized in that, It also includes a clamping mechanism (130), located in the second hole section (212), and abutting against the high and low temperature resistant insulation mechanism (110) and the conductive metal mechanism (120).

5. The sealing unit according to claim 4, characterized in that, The temperature sensor (400) includes a bracket, a temperature sensing element, and lead wires; The bracket is mounted on the clamping mechanism (130); The temperature sensing element is disposed on the bracket and electrically connected to the second wire harness (500) via the lead wire. When the valve is located at the opening of the gas cylinder, the temperature sensing element is located inside the gas cylinder.

6. The sealing unit according to any one of claims 1 to 5, characterized in that, The high and low temperature resistant insulation mechanism (110) is a structural component made of polyetheretherketone, polyimide or polychlorotrifluoroethylene, and the high and low temperature resistant insulation mechanism (110) includes a sealing substrate (101) and a retaining ring (103). The sealing substrate (101) is sealed within the wire harness mounting hole (210) and is disposed around the conductive metal mechanism (120); The channel (102) is disposed on the sealing substrate (101); The wall of the wire harness mounting hole (210) has a receiving hole (220) coaxially disposed with the wire harness mounting hole (210). The retaining ring (103) is sealed within the receiving hole (220) and is disposed around the sealing substrate (101).

7. The sealing unit according to claim 6, characterized in that, The high and low temperature resistant insulation mechanism (110) also includes a sealing ring (104), which is sealed in the receiving hole (220), surrounds the sealing base (101), and is located at the end of the retaining ring (103).

8. A bottle neck valve, characterized in that, include: The sealing unit (100) as described in any one of claims 1 to 7; Valve body (200); First wire harness (300); Temperature sensor (400).

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