阅读说明：本技术 一种高压瓶口阀上的tprd泄压装置 (TPRD pressure relief device on high-pressure bottle mouth valve ) 是由 赵亚丽 何春辉 陈甲楠 葛安全 许春华 苏红艳 崔鸿 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种高压瓶口阀上的TPRD泄压装置,在阀体上设置有第一密封结构；在阀体底面中部向内依次开设有第一、第二通道,第一通道的内孔径大于第二通道的内孔径,在第二通道顶面中部向内开设有搁置槽；在滑动阀芯上段设置有轴肩,在滑动阀芯顶面中部向内开设有定位槽,轴肩伸入第二通道中将感温玻璃球固定于搁置槽与定位槽之间；在滑动阀芯上套设有导向挡套,导向挡套固定于第一通道中,且导向挡套顶部抵于轴肩下端面上、导向挡套底部伸出第一通道外；在伸出第一通道外的导向挡套侧壁上间隔开设有若干通孔,滑动阀芯下段伸出导向挡套外,在伸出导向挡套外的滑动阀芯上设置有第二密封结构。该装置结构简单、集成度高、泄露点少。(The invention discloses a TPRD pressure relief device on a high-pressure bottle mouth valve, wherein a valve body is provided with a first sealing structure; a first channel and a second channel are sequentially arranged inwards in the middle of the bottom surface of the valve body, the inner aperture of the first channel is larger than that of the second channel, and a placing groove is arranged inwards in the middle of the top surface of the second channel; a shaft shoulder is arranged at the upper section of the sliding valve core, a positioning groove is inwards formed in the middle of the top surface of the sliding valve core, and the shaft shoulder extends into the second channel to fix the temperature sensing glass ball between the placing groove and the positioning groove; a guide blocking sleeve is sleeved on the sliding valve core and fixed in the first channel, the top of the guide blocking sleeve abuts against the lower end face of the shaft shoulder, and the bottom of the guide blocking sleeve extends out of the first channel; a plurality of through holes are arranged on the side wall of the guide blocking sleeve extending out of the first channel at intervals, the lower section of the sliding valve core extends out of the guide blocking sleeve, and a second sealing structure is arranged on the sliding valve core extending out of the guide blocking sleeve. The device has simple structure, high integration level and less leakage point.)

1. A TPRD pressure relief device on a high pressure bottle neck valve, comprising: the valve body, its characterized in that: a first sealing structure is arranged on the lower section of the cylinder body of the valve body; a first channel and a second channel are sequentially arranged in the middle of the bottom surface of the valve body from bottom to top, the inner aperture of the first channel is larger than that of the second channel, and a placing groove for placing a bulge at the top of the temperature sensing glass ball is inwards arranged in the middle of the top surface of the second channel; a sliding valve core is movably inserted and arranged in the first channel and the second channel, a shaft shoulder is arranged at the upper section of the sliding valve core, a positioning groove which is matched with the contour of the spherical surface at the bottom of the temperature sensing glass ball and used for placing the spherical surface at the bottom of the temperature sensing glass ball is inwards arranged in the middle of the top surface of the sliding valve core, the shaft shoulder extends into the second channel and then abuts against the bottom of the temperature sensing glass ball, and the temperature sensing glass ball is fixed between the placing groove and the positioning groove; a guide blocking sleeve is sleeved on the sliding valve core and fixed in the first channel, the top of the guide blocking sleeve abuts against the lower end face of the shaft shoulder, and the bottom of the guide blocking sleeve extends out of the first channel; a plurality of through holes are arranged on the side wall of the guide retaining sleeve extending out of the first channel at intervals, and after the temperature sensing glass ball is broken, when the sliding valve core moves upwards to an upper limit position under the action of gas pressure in the hydrogen storage cylinder, the bottom surface of the sliding valve core is higher than the through holes; when the temperature sensing glass ball is not broken and the sliding valve core is at the lower limit position, the lower section of the sliding valve core extends out of the guide blocking sleeve, and a second sealing structure is arranged on the sliding valve core extending out of the guide blocking sleeve.

2. A TPRD pressure relief device on a high pressure bottle neck valve as claimed in claim 1, wherein: and a third channel is formed in the lower section of the guide retaining sleeve, the inner aperture of the third channel is larger than that of the guide retaining sleeve, and the length of the third channel ensures that a second sealing structure positioned on the lower section of the sliding valve core is always positioned in the third channel when the sliding valve core moves upwards to the upper limit position after the temperature sensing glass ball is broken.

3. A TPRD pressure relief device on a high pressure bottle neck valve as claimed in claim 1, wherein: the first sealing structure is as follows: set up the first holding tank of inside concave yield on the valve body, first sealing ring and first O shape sealing washer set up in first holding tank.

4. A TPRD pressure relief device on a high pressure bottle neck valve as in claims 1, 2 or 3, wherein: the second sealing structure is as follows: and a second accommodating groove which is recessed inwards is formed in the lower section of the sliding valve core, and a second sealing check ring and a second O-shaped sealing ring are arranged in the second accommodating groove.

5. A TPRD pressure relief device on a high pressure bottle neck valve according to claim 1 or 2, characterized in that: the valve body below the first sealing structure is provided with an external thread section, the protective housing is screwed with the external thread section through an internal thread section on the protective housing, so that the lower section of the valve body, the guide retaining sleeve extending out of the valve body and the sliding valve core extending out of the guide retaining sleeve are completely covered and protected in the protective housing.

6. A TPRD pressure relief device on a high pressure bottle neck valve as claimed in claim 1, wherein: and the through holes on the guide retaining sleeve are uniformly distributed for a circle at intervals along the circumferential direction of the guide retaining sleeve.

7. A TPRD pressure relief device on a high pressure bottle neck valve as claimed in claim 1, wherein: a plurality of platforms are cut on the outer side wall of the upper section of the valve body at intervals along the circumferential direction.

Technical Field

The invention relates to the technical field of hydrogen storage, in particular to a TPRD pressure relief device on a high-pressure bottle mouth valve.

Background

The hydrogen storage mode adopts the high-pressure hydrogen storage of the hydrogen storage cylinder, the high-pressure hydrogen in the hydrogen storage cylinder can be reasonably and effectively used without opening the bottleneck valve, and the high-pressure hydrogen in the hydrogen storage cylinder can be provided for the fuel cell after being processed by the bottleneck valve and a subsequent system, so the bottleneck valve is an important part in the hydrogen supply system, and the performance of the bottleneck valve directly influences the normal work of the fuel cell, the use efficiency of the hydrogen supply system and the safety performance of the hydrogen supply system.

The TPRD pressure relief device on the common high-pressure bottle mouth valve in the market is the pressure relief device of the fusible alloy plug integrated on the main valve body of the bottle mouth valve, and because the fusible alloy has low strength, the fusible alloy is easy to generate a creep phenomenon under a high-pressure environment, so that gas leakage is caused, and the safety and reliability are very low.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the TPRD pressure relief device on the high-pressure bottle mouth valve is simple in structure and few in leakage point.

In order to solve the problems, the invention adopts the technical scheme that: the TPRD pressure relief device on the high-pressure bottle mouth valve comprises: the valve body is provided with a first sealing structure on a lower-section column body of the valve body; a first channel and a second channel are sequentially arranged in the middle of the bottom surface of the valve body from bottom to top, the inner aperture of the first channel is larger than that of the second channel, and a placing groove for placing a bulge at the top of the temperature sensing glass ball is inwards arranged in the middle of the top surface of the second channel; a sliding valve core is movably inserted and arranged in the first channel and the second channel, a shaft shoulder is arranged at the upper section of the sliding valve core, a positioning groove which is matched with the contour of the spherical surface at the bottom of the temperature sensing glass ball and used for placing the spherical surface at the bottom of the temperature sensing glass ball is inwards arranged in the middle of the top surface of the sliding valve core, the shaft shoulder extends into the second channel and then abuts against the bottom of the temperature sensing glass ball, and the temperature sensing glass ball is fixed between the placing groove and the positioning groove; a guide blocking sleeve is sleeved on the sliding valve core and fixed in the first channel, the top of the guide blocking sleeve abuts against the lower end face of the shaft shoulder, and the bottom of the guide blocking sleeve extends out of the first channel; a plurality of through holes are arranged on the side wall of the guide retaining sleeve extending out of the first channel at intervals, and after the temperature sensing glass ball is broken, when the sliding valve core moves upwards to an upper limit position under the action of gas pressure in the hydrogen storage cylinder, the bottom surface of the sliding valve core is higher than the through holes; when the temperature sensing glass ball is not broken and the sliding valve core is at the lower limit position, the lower section of the sliding valve core extends out of the guide blocking sleeve, and a second sealing structure is arranged on the sliding valve core extending out of the guide blocking sleeve.

Further, in the TPRD pressure relief device on the high-pressure bottle neck valve, a third channel is formed in the lower section of the guide retaining sleeve, the inner aperture of the third channel is larger than that of the guide retaining sleeve, and the length of the third channel ensures that a second sealing structure located at the lower section of the sliding valve core is always located in the third channel when the sliding valve core moves upwards to the upper limit position after the temperature-sensitive glass ball is broken.

Further, in the TPRD pressure relief device on the high-pressure bottle neck valve, the first sealing structure is: set up the first holding tank of inside concave yield on the valve body, first sealing ring and first O shape sealing washer set up in first holding tank.

Further, in the TPRD pressure relief device on the high-pressure bottle neck valve, the second sealing structure is: and a second accommodating groove which is recessed inwards is formed in the lower section of the sliding valve core, and a second sealing check ring and a second O-shaped sealing ring are arranged in the second accommodating groove.

Further, in the TPRD pressure relief device on the high pressure bottle neck valve, an external thread section is arranged on the valve body below the first sealing structure, the protective cover shell is screwed on the lower section of the valve body through the internal thread section on the protective cover shell and the external thread section, and the lower section of the valve body, the guide retaining sleeve extending out of the valve body and the sliding valve core extending out of the guide retaining sleeve are completely covered and protected in the protective cover shell.

Further, in the TPRD pressure relief device on the high-pressure bottle neck valve, each through hole on the guide blocking sleeve is uniformly distributed for a circle at intervals along the circumferential direction of the guide blocking sleeve.

Further, in the TPRD pressure relief device on the high-pressure bottle neck valve, a plurality of platforms are cut on the outer side wall of the upper section of the valve body at intervals along the circumferential direction.

The invention has the beneficial effects that: the device has the advantages of simple structure, simple part processing technology, convenient assembly and small volume, and occupies small space and has high integration level when being installed on the bottleneck valve. The valve body adopts an integral form, the leakage point is less, and only two parts are needed to be sealed when the valve body is arranged on the bottleneck valve, so that the leakage risk is reduced, and the cost is reduced. In addition, when pressure is relieved, the stroke of the sliding valve core is short, and the waiting time before pressure relief is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a TPRD pressure relief device on a high-pressure bottle neck valve according to the present invention.

Fig. 2 is a schematic structural view of the TPRD pressure relief device on the high pressure bottle neck valve of fig. 1 with the protective cover removed.

FIG. 3 is a schematic view of the internal structure of the TPRD pressure relief device on the high pressure bottle mouth valve of FIG. 1.

Fig. 4 is a schematic diagram of an internal structure of a TPRD pressure relief device integrated on a high-pressure bottle neck valve when the TPRD pressure relief device is in an unopened state.

Fig. 5 is a schematic diagram of an internal structure of a TPRD pressure relief device integrated on a high-pressure bottleneck valve when the TPRD pressure relief device is in an open state.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 2 and fig. 3, the TPRD pressure relief device on a high-pressure bottle-neck valve in this embodiment includes: the valve body 2 is provided with a first sealing structure on the lower column body of the valve body 2. The first sealing structure is as follows: an inwardly recessed first receiving groove 24 is formed in the valve body 2, and a first seal retainer 61 and a first O-ring 62 are disposed in the first receiving groove 24. A first channel 21 and a second channel 22 are sequentially arranged in the middle of the bottom surface of the valve body 2 from bottom to top, the inner aperture of the first channel 21 is larger than that of the second channel 22, and a holding groove 23 for holding a top protrusion 31 of the temperature sensing glass ball 3 is inwards arranged in the middle of the top surface of the second channel 22. A sliding valve core 4 is movably inserted in the first channel 21 and the second channel 22, a shaft shoulder 41 is arranged at the upper section of the sliding valve core 4, a positioning groove 42 which is matched with the spherical surface contour of the bottom of the temperature sensing glass ball and used for placing the spherical surface 32 of the bottom of the temperature sensing glass ball 3 is inwards arranged in the middle of the top surface of the sliding valve core 4, the shaft shoulder 41 extends into the second channel 22 and then abuts against the bottom of the temperature sensing glass ball 3, and the temperature sensing glass ball 3 is fixed between the placing groove 23 and the positioning groove 42. The sliding valve core 4 is sleeved with a guide blocking sleeve 5, the guide blocking sleeve 5 is fixed in the first channel 21, the top of the guide blocking sleeve 5 is abutted against the lower end face of the shaft shoulder 41, and the bottom of the guide blocking sleeve 5 extends out of the first channel 21. A plurality of through holes 51 are formed in the side wall of the guide retaining sleeve 5 extending out of the first channel 21 at intervals, and in this embodiment, the through holes 51 in the guide retaining sleeve 5 are uniformly distributed at intervals along the circumferential direction of the guide retaining sleeve 5. After the temperature sensing glass ball 3 is broken, when the sliding valve core 4 moves upwards to the upper limit position under the action of the gas pressure in the hydrogen storage cylinder, the bottom surface of the sliding valve core 4 is higher than each through hole 51; when the temperature sensing glass ball 3 is not broken and the sliding valve core 4 is at the lower limit position, the lower section of the sliding valve core 4 extends out of the guide retaining sleeve 5, and a second sealing structure is arranged on the sliding valve core 4 extending out of the guide retaining sleeve 5.

As shown in fig. 2 and 3, a third channel 52 is formed in the lower section of the guide sleeve 5, the inner aperture of the third channel 52 is larger than that of the guide sleeve 5, and the length of the third channel 52 ensures that the second sealing structure located in the lower section of the sliding valve core 4 is always located in the third channel 52 when the sliding valve core 4 moves upward to the upper limit position after the temperature-sensitive glass ball 3 is broken. The second sealing structure is as follows: a second receiving groove 43 recessed inward is formed on a lower section of the spool 4, and a second gasket 63 and a second O-ring 64 are disposed in the second receiving groove 43.

As shown in fig. 1 and 3, an external thread section is provided on the valve body 2 below the first sealing structure, the protective cover 7 is screwed on the lower section of the valve body 2 by screwing the internal thread section on the protective cover with the external thread section, and the lower section of the valve body 2, the guide sleeve 5 extending out of the valve body 2, and the slide valve core 4 extending out of the guide sleeve 5 are all covered and protected in the protective cover 7. The arrangement of the protective cover 7 can avoid the risk of the temperature sensing glass ball 3 breaking caused by accidental falling or accidental collision of the device.

The TPRD pressure relief device is firstly taken down from the protective casing 7 before being installed on the bottleneck valve, and then the TPRD pressure relief device is integrated on the bottleneck valve. As shown in fig. 4 and 5, the mouthpiece valve includes: the main valve body 1 is provided with a connecting column body which can extend into the mouth of a hydrogen storage cylinder at the bottom of the main valve body 1, a discharge flow channel is arranged in the main valve body 1, one end of the discharge flow channel penetrates through the bottom surface of the connecting column body to form an air inlet at the bottom surface of the connecting column body, and the other end of the discharge flow channel penetrates through the surface of the main valve body 1 to form an air outlet at the surface of the main valve body. The main valve body 1 is provided with a main discharge flow channel, the main discharge flow channel is provided with a branch flow channel 11, the end of the branch flow channel 11 penetrates through the surface of the main valve body 1 to form a connector on the surface of the main valve body 1, the TPRD pressure relief device is hermetically arranged in the connector, and the lower section of the TPRD pressure relief device hermetically extends into the main discharge flow channel through the branch flow channel 11 to divide the main discharge flow channel into a first main discharge flow channel 121 and a second main discharge flow channel 122. When the TPRD pressure relief device is in an unopened state, the first drainage channel 121 and the second drainage channel 122 are blocked from flowing through, and when the TPRD pressure relief device is in an opened state, the first drainage channel 121 and the second drainage channel 122 are unblocked.

The valve body 2 of the TPRD pressure relief device is fixed in the first connecting port through threaded connection and sealed through a first sealing structure. The inner aperture of the branch flow passage 11 is larger than the inner aperture of the first bleed flow passage 121 located at the branch flow passage 11, so that a step resting surface 13 is formed between the bottom of the branch flow passage 11 and the first bleed flow passage 121, a gap H is left between the bottom surface of the valve body 2 and the step resting surface 13, and the second bleed flow passage 122 penetrates through the side wall of the branch flow passage 11 between the bottom surface of the valve body 2 and the step resting surface 13, so that a leakage port 14 is formed on the side wall of the branch flow passage 11. The bottom of the guide blocking sleeve 5 extends out of the first channel 22 and then abuts against the step placement surface 13, when the temperature-sensing glass ball 3 is not broken, the sliding valve core 4 is at the lower limit position, and the lower section of the sliding valve core 4 extends out of the guide blocking sleeve 5 and then is hermetically arranged in the first discharge flow channel 121 through a second sealing structure arranged at the lower section of the sliding valve core 4.

As shown in fig. 1, in the present embodiment, a plurality of lands 20 are cut at intervals in the circumferential direction on the outer side wall of the upper section of the valve body 2. The arrangement of each platform 20 is convenient for an operator to screw the TPRD pressure relief device 2 in a connecting port of the bottle mouth valve.

The TPRD pressure relief device works according to the following principle:

when the temperature in the hydrogen storage cylinder or the ambient temperature is within the bearing temperature of the temperature sensing glass ball 3, the TPRD pressure relief device is in an unopened state, as shown in fig. 4, at this time, after the lower section of the sliding valve core 4 extends out of the guide retaining sleeve 5, the lower section of the sliding valve core 4 is hermetically arranged in the first discharge flow channel 121 through the second sealing structure arranged at the lower section of the sliding valve core 4, and the circulation of the first discharge flow channel 121 and the second discharge flow channel 122 is blocked.

When the temperature of the gas cylinder or the environment temperature rises, the liquid in the temperature sensing glass ball 3 is heated and expanded. When the temperature in the hydrogen storage cylinder or the ambient temperature rises above the bearing temperature of the temperature sensing glass ball 3 (the bearing temperature of the temperature sensing glass ball 3 is generally 110 ± 5 ℃), the outer glass of the temperature sensing glass ball 3 is burst, and the sliding valve core 4 moves upward under the action of the gas pressure in the hydrogen storage cylinder due to the loss of the supporting force of the temperature sensing glass ball 3 on the sliding valve core, so that the first discharge flow channel 121 is communicated with the through holes 51, as shown in fig. 5, the first discharge flow channel 121 is communicated with the second discharge flow channel 122 through the through holes 51.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.

The invention has the advantages that: the device has the advantages of simple structure, simple part processing technology, convenient assembly and small volume, and occupies small space and has high integration level when being installed on the bottleneck valve. The valve body 2 is in an integral form, the leakage point is less, and only two parts are needed to be sealed when the valve body is installed on the bottleneck valve, so that the leakage risk is reduced, and the cost is reduced. In addition, when pressure is relieved, the stroke of the sliding valve core 4 is short, and the waiting time before pressure relief is reduced.