阅读说明：本技术 一种瓶口阀中的泄压装置 (Pressure relief device in bottleneck valve ) 是由 何春辉 赵亚丽 陈甲楠 许春华 王学圣 唐健 丁桓展 葛安全 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种瓶口阀中的泄压装置,在主阀体底部设置有连接柱体,在主阀体内设置有泄放流道,泄放流道的一端在连接柱体底面形成进气口,泄放流道的另一端在主阀体表面形成出气口；在泄放流道上设置有第一分支流道,第一分支流道在主阀体表面形成第一连接口,TPRD泄压装置密封设置于第一连接口中,且TPRD泄压装置下段通过第一分支流道密封伸入泄放流道中,将泄放流道分隔成第一泄放流道和第二泄放流道；在进气口与TPRD泄压装置之间的第一泄放流道上设置有第二分支流道,第二分支流道端部在主阀体表面形成第二连接口,手动泄压装置密封设置于第二连接口中。上述瓶口阀上的泄压装置结构简单、泄漏点少、放气方便且放气所需时间少。(The invention discloses a pressure relief device in a bottle mouth valve.A connecting column body is arranged at the bottom of a main valve body, a discharge flow channel is arranged in the main valve body, one end of the discharge flow channel forms an air inlet at the bottom surface of the connecting column body, and the other end of the discharge flow channel forms an air outlet on the surface of the main valve body; a first branch flow channel is arranged on the discharge flow channel, a first connecting port is formed on the surface of the main valve body by the first branch flow channel, the TPRD pressure relief device is arranged in the first connecting port in a sealing mode, and the lower section of the TPRD pressure relief device stretches into the discharge flow channel through the first branch flow channel in a sealing mode to divide the discharge flow channel into a first discharge flow channel and a second discharge flow channel; and a second branch flow channel is arranged on the first discharge flow channel between the air inlet and the TPRD pressure relief device, a second connecting port is formed on the surface of the main valve body at the end part of the second branch flow channel, and the manual pressure relief device is hermetically arranged in the second connecting port. The pressure relief device on the bottleneck valve has the advantages of simple structure, few leakage points, convenient air release and short air release time.)

1. A pressure relief device in a bottleneck valve, comprising: the main valve body is provided with a connecting column body which can extend into the mouth of the hydrogen storage cylinder at the bottom, a discharge flow channel is arranged in the main valve body, 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 to form an air outlet at the surface of the main valve body; the method is characterized in that: the TPRD pressure relief device is arranged in the first connection port in a sealing mode, the lower section of the TPRD pressure relief device stretches into the discharging flow channel through the first branch flow channel in a sealing mode to divide the discharging flow channel into a first discharging flow channel and a second discharging flow channel, the TPRD pressure relief device blocks the first discharging flow channel and the second discharging flow channel when the TPRD pressure relief device is not in an opened state, and when the TPRD pressure relief device is in an opened state, the first discharging flow channel and the second discharging flow channel are unblocked; and a second branch flow channel is arranged on the first discharge flow channel between the air inlet and the TPRD pressure relief device, the end part of the second branch flow channel penetrates through the surface of the main valve body to form a second connecting port on the surface of the main valve body, and the manual pressure relief device is hermetically arranged in the second connecting port.

2. The pressure relief device in a bottleneck valve according to claim 1, wherein: the first connecting port and the second connecting port are located on the same side of the main valve body.

3. The pressure relief device in a bottleneck valve according to claim 1, wherein: the first discharging flow channel and the second discharging flow channel which are positioned on two sides of the first branch flow channel are intersected, the first branch flow channel and the first discharging flow channel which is positioned at the first branch flow channel are coaxial, and the second discharging flow channel penetrates through the side wall of the first branch flow channel.

4. A pressure relief device in a bottleneck valve according to claim 3 wherein: the TPRD pressure relief device structurally comprises: the lower section of the valve body is hermetically arranged in the first connecting port through a first sealing structure; the inner aperture of the first branch flow channel is larger than that of the first discharge flow channel positioned at the first branch flow channel, so that a step placing surface is formed between the bottom of the first branch flow channel and the first discharge flow channel, a distance H is reserved between the bottom surface of the valve body and the step placing surface, the second discharge flow channel penetrates through the side wall of the first branch flow channel between the bottom surface of the valve body and the step placing surface, and a leakage port is formed on the side wall of the first branch flow channel; a first channel and a second channel are sequentially arranged inwards on 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 for placing the top bulge 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 and then abuts against the step placing face; a plurality of through holes are arranged on the side wall of the guide retaining sleeve extending out of the first channel at intervals, after the temperature sensing glass ball is crushed, 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 end surface of the sliding valve core is higher than each through hole, so that the first discharge flow channel and the second discharge flow channel are smooth; when the temperature sensing glass ball is not broken, the sliding valve core is in the lower limit position, and the lower section of the sliding valve core extends out of the guide retaining sleeve and is arranged in the first discharge flow channel in a sealing mode through a second sealing structure arranged on the lower section of the sliding valve core.

5. The pressure relief device in a bottleneck valve according to claim 4, 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.

6. A pressure relief device in a finish valve according to claim 4 or 5, wherein: the first sealing structure is as follows: the valve body is provided with a first accommodating groove which is recessed inwards, and the first sealing check ring and the first O-shaped sealing ring are arranged in the first accommodating groove; 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.

7. The pressure relief device in a bottleneck valve according to claim 1, wherein: the manual pressure relief device structurally comprises: the lower section of the manual discharge valve body is hermetically arranged in the second connecting port through a third sealing structure; a fourth channel, a fifth channel and a sixth channel are sequentially arranged on the manual relief valve body from bottom to top, the fourth channel penetrates through the bottom surface of the manual relief valve body, the sixth channel penetrates through the top surface of the manual relief valve body, the inner aperture of the fifth channel is smaller than that of the fourth channel and that of the sixth channel, a first stage placing surface is formed between the fourth channel and the fifth channel, a spring and a steel ball are sequentially arranged in the fourth channel from bottom to top, the bottom of the spring is fixed in the fourth channel, and under the elastic force of the spring, the steel ball is sealed and pressed at the fifth channel opening at the first stage placing surface by the top of the spring to block the circulation of the fourth channel and the fifth channel; the first internal thread section is arranged in the sixth channel, and the connecting sleeve is hermetically screwed in the sixth channel through the external thread section on the connecting sleeve and the first internal thread section in a sealing manner; a second internal thread section is arranged in the connecting sleeve, and the manual adjusting sleeve is hermetically screwed in the connecting sleeve through the external thread section on the manual adjusting sleeve and the second internal thread section; the bottom surface of the manual adjusting sleeve is closed, an adjusting rod is arranged on the bottom surface of the manual adjusting sleeve and points to the steel ball, and a plurality of through holes are formed in the bottom surface of the manual adjusting sleeve; and when the manual adjusting sleeve is rotated to enable the adjusting rod to move downwards to push the steel ball downwards to be separated from the fifth channel opening, the fourth channel and the fifth channel are unblocked.

8. The pressure relief device in a finish valve of claim 7, wherein: and a fourth sealing structure is arranged on the first stage placing surface between the steel ball and the first stage placing surface.

9. The pressure relief device in a finish valve of claim 8, wherein: the third sealing structure is as follows: the manual relief valve body is composed of a plurality of columns with the outer diameters sequentially increasing from bottom to top, and a third O-shaped sealing ring is arranged on each step table surface between every two adjacent columns; the fourth sealing structure is a fourth O-shaped sealing ring arranged on the first stage placing surface.

Technical Field

The invention relates to the technical field of hydrogen storage, in particular to a pressure relief device in a bottleneck 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.

A pressure relief device in a bottle mouth valve commonly used in the market is characterized in that a fusible alloy plug pressure relief device is integrated on a main valve body of the bottle mouth valve, and under special conditions, if gas in a hydrogen storage cylinder needs to be released after a gas pressure test or when the device is not used for a long time, a flow limiting valve is integrated on the bottle mouth valve and is used for releasing gas through the flow limiting valve, the gas release of the flow limiting valve is very slow, and the time of a whole day may be needed.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the pressure relief device in the bottleneck valve has the advantages of simple structure, few leakage points, convenient air release and short air release time.

In order to solve the problems, the invention adopts the technical scheme that: the pressure relief device in the bottle mouth valve comprises: the main valve body is provided with a connecting column body which can extend into the mouth of the hydrogen storage cylinder at the bottom, a discharge flow channel is arranged in the main valve body, 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 to form an air outlet at the surface of the main valve body; the TPRD pressure relief device is arranged in the first connection port in a sealing mode, the lower section of the TPRD pressure relief device stretches into the discharging flow channel through the first branch flow channel in a sealing mode to divide the discharging flow channel into a first discharging flow channel and a second discharging flow channel, the TPRD pressure relief device blocks the first discharging flow channel and the second discharging flow channel when the TPRD pressure relief device is not in an opened state, and when the TPRD pressure relief device is in an opened state, the first discharging flow channel and the second discharging flow channel are unblocked; and a second branch flow channel is arranged on the first discharge flow channel between the air inlet and the TPRD pressure relief device, the end part of the second branch flow channel penetrates through the surface of the main valve body to form a second connecting port on the surface of the main valve body, and the manual pressure relief device is hermetically arranged in the second connecting port.

Further, in the pressure relief device in the bottle mouth valve, the first connection port and the second connection port are located on the same side of the main valve body.

Further, according to the pressure relief device in the bottle mouth valve, the first relief flow channel and the second relief flow channel located on two sides of the first branch flow channel are intersected, the first branch flow channel and the first relief flow channel located at the first branch flow channel are coaxial, and the second relief flow channel penetrates through the side wall of the first branch flow channel.

Further, the pressure relief device in the bottle mouth valve comprises: the TPRD pressure relief device structurally comprises: the lower section of the valve body is hermetically arranged in the first connecting port through a first sealing structure; the inner aperture of the first branch flow channel is larger than that of the first discharge flow channel positioned at the first branch flow channel, so that a step placing surface is formed between the bottom of the first branch flow channel and the first discharge flow channel, a distance H is reserved between the bottom surface of the valve body and the step placing surface, the second discharge flow channel penetrates through the side wall of the first branch flow channel between the bottom surface of the valve body and the step placing surface, and a leakage port is formed on the side wall of the first branch flow channel; a first channel and a second channel are sequentially arranged inwards on 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 for placing the top bulge 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 and then abuts against the step placing face; a plurality of through holes are arranged on the side wall of the guide retaining sleeve extending out of the first channel at intervals, after the temperature sensing glass ball is crushed, 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 end surface of the sliding valve core is higher than each through hole, so that the first discharge flow channel and the second discharge flow channel are smooth; when the temperature sensing glass ball is not broken, the sliding valve core is in the lower limit position, and the lower section of the sliding valve core extends out of the guide retaining sleeve and is arranged in the first discharge flow channel in a sealing mode through a second sealing structure arranged on the lower section of the sliding valve core.

Further, according to the pressure relief device in the bottle mouth valve, the third channel is formed in the lower section of the guide blocking sleeve, the inner aperture of the third channel is larger than that of the guide blocking sleeve, and the length of the third channel ensures that the second sealing structure located on 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 sensing glass ball is broken.

Further, the pressure relief device in the bottle mouth valve is characterized in that the first sealing structure is as follows: the valve body is provided with a first accommodating groove which is recessed inwards, and the first sealing check ring and the first O-shaped sealing ring are arranged in the first accommodating groove; 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.

Further, the pressure relief device in the bottle mouth valve comprises: the lower section of the manual discharge valve body is hermetically arranged in the second connecting port through a third sealing structure; a fourth channel, a fifth channel and a sixth channel are sequentially arranged on the manual relief valve body from bottom to top, the fourth channel penetrates through the bottom surface of the manual relief valve body, the sixth channel penetrates through the top surface of the manual relief valve body, the inner aperture of the fifth channel is smaller than that of the fourth channel and that of the sixth channel, a first stage placing surface is formed between the fourth channel and the fifth channel, a spring and a steel ball are sequentially arranged in the fourth channel from bottom to top, the bottom of the spring is fixed in the fourth channel, and under the elastic force of the spring, the steel ball is sealed and pressed at the fifth channel opening at the first stage placing surface by the top of the spring to block the circulation of the fourth channel and the fifth channel; the first internal thread section is arranged in the sixth channel, and the connecting sleeve is hermetically screwed in the sixth channel through the external thread section on the connecting sleeve and the first internal thread section in a sealing manner; a second internal thread section is arranged in the connecting sleeve, and the manual adjusting sleeve is hermetically screwed in the connecting sleeve through the external thread section on the manual adjusting sleeve and the second internal thread section; the bottom surface of the manual adjusting sleeve is closed, an adjusting rod is arranged on the bottom surface of the manual adjusting sleeve and points to the steel ball, and a plurality of through holes are formed in the bottom surface of the manual adjusting sleeve; and when the manual adjusting sleeve is rotated to enable the adjusting rod to move downwards to push the steel ball downwards to be separated from the fifth channel opening, the fourth channel and the fifth channel are unblocked.

Further, in the pressure relief device in the bottle mouth valve, a fourth sealing structure is arranged at the first stage placing surface between the steel ball and the first stage placing surface.

Further, in the pressure relief device in the bottle mouth valve, the third sealing structure is: the manual relief valve body is composed of a plurality of columns with the outer diameters sequentially increasing from bottom to top, and a third O-shaped sealing ring is arranged on each step table surface between every two adjacent columns; the fourth sealing structure is a fourth O-shaped sealing ring arranged on the first stage placing surface.

The invention has the beneficial effects that: the device has simple structure, less leakage points, good sealing performance and high integration level; when the gas in the hydrogen storage cylinder needs to be discharged after the gas pressure test or under the conditions of long-term disuse and the like, the manual pressure relief device can be manually opened to complete the gas discharge operation of the hydrogen storage cylinder, the gas discharge is convenient and the gas discharge time is short; when the temperature or the environment temperature in the hydrogen storage cylinder rises to be higher than the bearing temperature of the TPRD pressure relief device, the TPRD pressure relief device is started, and the gas in the hydrogen storage cylinder flows out through the gas inlet, the first discharge flow channel, the second discharge flow channel and the gas outlet, so that the purpose of automatic pressure relief is achieved.

Drawings

Fig. 1 is a schematic perspective view of a bottle mouth valve with a pressure relief device integrated therein according to the present invention.

Fig. 2 is a schematic top view of a bottle-neck valve with an integrated pressure relief device.

Fig. 3 is a schematic view of the structure in the sectional direction of a-a in fig. 2.

Fig. 4 is an external structure diagram of the TPRD pressure relief device.

Fig. 5 is a schematic view of the internal structure of the TPRD pressure relief device integrated in the bottle mouth valve in another cross-sectional direction of fig. 1.

Fig. 6 is a schematic structural diagram of the TPRD pressure relief device in an open state.

Fig. 7 is an external structural schematic diagram of a manual pressure relief device.

Fig. 8 is a schematic view of the internal structure of the manual pressure relief device.

Fig. 9 is a schematic view of the internal structure of the manual vent valve body.

Fig. 10 is a schematic view of the connection structure of the connection sleeve and the manual adjustment sleeve.

Fig. 11 is a schematic view of a manual pressure relief device 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.