阅读说明：本技术 一种车用高压氢气组合瓶口阀 (High-pressure hydrogen combined bottle mouth valve for vehicle ) 是由 计京宝 蒋三青 郭文军 葛晓成 唐再禹 于 2021-05-13 设计创作，主要内容包括：本发明公开了一种车用高压氢气组合瓶口阀,包括阀体,阀体上安装有电磁阀、截止阀、泄放阀、限流阀、温控泄放装置和过滤机构；在阀体内开设有依次相连的第一通道、第二通道、第三通道、第四通道和第五通道构成充气通道,由相互连通的第一温泄支路和第二温泄支道构成的“L”形的温泄通道,由相互连通的第一泄放支路和第二泄放支路构成的“L”形的泄放通道,泄放通道通过第六通道与第三通道连通。将限流阀、温控泄放装置、过滤机构集成到阀体上,并重新设定阀体内气路,减少供氢系统管路接点及漏点,系统的安全性及可靠性更高。(The invention discloses a high-pressure hydrogen combined bottle mouth valve for a vehicle, which comprises a valve body, wherein an electromagnetic valve, a stop valve, a discharge valve, a flow limiting valve, a temperature control discharge device and a filtering mechanism are arranged on the valve body; the valve body is internally provided with a first channel, a second channel, a third channel, a fourth channel and a fifth channel which are sequentially connected to form an inflation channel, an L-shaped temperature relief channel formed by a first temperature relief branch and a second temperature relief branch which are communicated with each other, and an L-shaped relief channel formed by a first relief branch and a second relief branch which are communicated with each other, wherein the relief channel is communicated with the third channel through a sixth channel. The flow limiting valve, the temperature control release device and the filtering mechanism are integrated on the valve body, the gas circuit in the valve body is reset, the number of joints and leakage points of a hydrogen supply system pipeline is reduced, and the safety and the reliability of the system are higher.)

1. The utility model provides a vehicular high-pressure hydrogen combination bottleneck valve, includes valve body (2), valve body (2) lower extreme has the screwed joint to be used for inserting hydrogen storage cylinder in, install solenoid valve (1), stop valve (3), bleeder valve (6) on valve body (2), its characterized in that: the valve body (2) is also provided with a flow limiting valve (4), a temperature control release device (8) and a filtering mechanism (5);

a first channel (26), a second channel (25), a third channel (22), a fourth channel (23) and a fifth channel (21) which are connected in sequence are arranged in the valve body (2) to form an inflation channel; the first channel (26) is an upper through hole and a lower through hole passing through a screw joint, the lower end of the first channel is used as a gas inlet (a) and is connected with a hydrogen storage cylinder and provided with the flow limiting valve (4), the upper end of the first channel is provided with the stop valve (3), the third channel (22) and the second channel (25) are transversely arranged one above the other, the electromagnetic valve (1) is arranged in the third channel (22) and is used for controlling the connection and disconnection of the third channel (22) and the second channel (25), one end of the fourth channel (23) is used as a gas adding port (c) and is provided with a plug, the other end of the fourth channel is communicated with the fifth channel (21), one end of the fifth channel (21) is inserted into the filtering mechanism (5), so that gas in the fourth channel (23) enters the fifth channel (21) after being filtered, and the other end of the fifth channel (21) is used as a gas outlet (b);

an L-shaped temperature relief channel formed by a first temperature relief branch (210) and a second temperature relief branch (211) which are communicated with each other is arranged in the valve body (2); the first temperature release branch (210) and the first channel (26) are arranged in parallel and pass through a screw joint, the temperature control release device (8) is installed in the first temperature release branch (210), and when the temperature reaches a set value, the temperature control release device (8) is opened to enable gas in the hydrogen storage cylinder to be released through the first temperature release branch (210) and the second temperature release branch (211);

an L-shaped discharge passage formed by a first discharge branch (27) and a second discharge branch (28) which are communicated with each other is arranged in the valve body (2); first bleeder branch (27) and first passageway (26) parallel arrangement and through the screwed joint, install in the second bleeder branch (28) bleeder valve (6), the bleeder passageway is through sixth passageway (24) and fourth passageway (23) intercommunication, and when meetting emergency trouble, bleeder valve (6) are opened, enable sixth passageway (24) and second bleeder branch (28) and switch on to gas in the gas cylinder is used for being pipeline rear end fuel cell air feed through bleeder passageway, sixth passageway (24), fourth passageway (23), fifth passageway (21), gas outlet (b) in proper order.

2. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 1, characterized in that: the flow limiting valve (4) comprises a flow limiting valve body (41), a second flow limiting channel (412), a third flow limiting channel (413) and a fourth flow limiting channel (414) which are sequentially connected from bottom to top are formed in the flow limiting valve body (41), a first spring (44), a flow limiting valve core (42) and an adjusting nut (43) are sequentially installed in the flow limiting valve body (41) from top to bottom, the adjusting nut (43) is screwed in the flow limiting valve body (41), a first flow limiting channel (411) is formed in the adjusting nut (43), an air flow channel is reserved between a lower T-shaped section (424) of the flow limiting valve core (42) and the inner wall of the second flow limiting channel (412), an upper hollow cylinder (421) is in sliding fit with the inner wall of the third flow limiting channel (413), a radial hole (422) is formed in the root of the upper hollow cylinder (421), and a step (423) is formed in the outer wall of the lower T-shaped section (424), the lower end of the first spring (44) extends into the upper hollow cylinder (421), the upper end of the first spring abuts against the upper end face of the third flow limiting channel (413), when the flow limiting valve core (42) is only acted by the first spring (44), the first flow limiting channel (411), the second flow limiting channel (412), the third flow limiting channel (413) and the fourth flow limiting channel (414) form a through air flow channel, and when the lower T-shaped section (424) moves upwards under the stress, the step inclined surface (423) abuts against the boundary of the second flow limiting channel (412) and the third flow limiting channel (413) to stop the flow.

3. The high-pressure hydrogen combination cylinder mouth valve for the vehicle according to claim 2, characterized in that: the first flow limiting channel (411) is formed in the adjusting nut (43) and is uniformly distributed around the circumference of the axis, and the radial holes (422) are formed in the root of the upper hollow cylinder (421) and are uniformly distributed around the circumference of the axis.

4. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 1, characterized in that: the temperature control release device (8) comprises a temperature control locking nut (81), a temperature sensing glass tube (82) and a sliding movable valve core (83) which are sequentially inserted into the inner cavity of the temperature control locking nut (81) from bottom to top, a second spring (84) is sleeved on the lower rod part of the sliding movable valve core (83), and an axial heat conduction hole (811) and a radial heat conduction hole (812) which are communicated with the inner cavity are formed in the top of the temperature control locking nut (81).

5. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 4, characterized in that: the second spring (84) adopts a butterfly-shaped elastic sheet, one end of the butterfly-shaped elastic sheet is assembled on the step surface of the sliding movable valve core (83), the other end of the butterfly-shaped elastic sheet is arranged on the step surface of the valve body (2), and the temperature control locking nut (81) is screwed on the first temperature relief branch (210) of the valve body (2).

6. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 4, characterized in that: grooves for inserting and installing the end of the temperature sensing glass tube (82) are respectively arranged on the temperature control locking nut (81) and the sliding movable valve core (83).

7. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 1, characterized in that: filter mechanism (5) include by preceding filter core (53), the spacing spring of filter core (52) and filter core end cap (51) that arrange in proper order after to, filter core end cap (51) have the external screw thread and are used for the installation fixed, and filter core (53) adopt the rear end to seal, the open cavity tube structure of front end, and longitudinal section is "n" shape, install between filter core end cap (51) and filter core (53) filter core spacing spring (52).

8. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 7, wherein: a sealing ring is arranged between the end of the filter element plug (51) and the external thread section, a groove is formed in the bottom of the external thread section and used for installing the rear end of the filter element limiting spring (52), and the front end of the filter element limiting spring (52) abuts against the closed end of the filter element (53).

9. The vehicular high-pressure hydrogen combination bottleneck valve according to claim 1, characterized in that: a wire harness installation channel (29) which penetrates through the valve body (2) up and down and passes through the screw joint is further arranged in the valve body, and the temperature sensor (7) is arranged in the wire harness installation channel (29) and can output a temperature signal sensed by the temperature probe (75) through a wire harness (72); the temperature sensor (7) comprises a wire passing nut (71), a wire harness (72), a temperature probe (76), a fixed pressure plate (74) and a locking bolt (75); the upper end of the temperature probe (76) is connected with the wire harness installation channel (29) in combination with an O-shaped sealing ring (73), and the lower end is arranged on the outer side of the lower part of the valve body (2); the fixed pressure plate (74) fastens the temperature probe (76) through a locking bolt (75); one end of the wire harness (72) is connected with the temperature probe (76), and the other end of the wire harness passes through the wire passing nut (71); the wire passing nut (71) is positioned at the top of the valve body (2) and connected in the wiring harness installation channel (29).

Technical Field

The invention belongs to the technical field of high-pressure valve products, and particularly relates to a combined bottleneck valve structure for being mounted on a bottleneck of a high-pressure hydrogen storage cylinder.

Background

High-pressure gaseous hydrogen storage is the most common and mature hydrogen storage technology at present, the storage mode is to compress industrial hydrogen into a high-pressure resistant container, and a hydrogen storage cylinder is the most common high-pressure gaseous hydrogen storage container; the high-pressure hydrogen integrated cylinder mouth valve is arranged on the hydrogen storage cylinder to control the on-off of the gas in the hydrogen storage cylinder; at present, hydrogen energy automobiles mainly adopt a high-pressure gaseous hydrogen storage mode.

With the explosion of a Korean hydrogen storage tank and the explosion accident of a Norwegian hydrogen station, the safety problem of hydrogen utilization attracts the attention of the whole world, and the alarm clock is sounded for the hydrogen energy industry on the steaming day; the related data, the explosion limit of hydrogen is 4.0-75.6% (volume fraction), when hydrogen is mixed with air, the volume ratio of hydrogen is in the above range, and the hydrogen explodes when meeting fire. Therefore, the sealing reliability of the hydrogen supply pipeline from the interface end of the hydrogen storage cylinder to the hydrogen fuel cell directly influences the use safety of the hydrogen energy automobile.

In the early stage, the components of the hydrogen supply system are connected in a split-row manner, the components are connected one by one in the arrangement manner, and the connection nodes are more, so that the risk of system leakage points is increased, and the system safety is not facilitated; on the contrary, the more the bottle-neck valves adopted by the hydrogen energy automobile are combined, the fewer the valve and pipe connection points required by the front end pipeline of the fuel cell are, and the corresponding leakage points are reduced.

Disclosure of Invention

Aiming at the problem of leakage point risk caused by the arrangement in a row, the invention aims to provide a highly-combined bottleneck valve integrated structure, so that the number of joints and leakage points of a pipeline of a hydrogen supply system is reduced, and the safety and reliability of the system are improved.

Therefore, the technical scheme adopted by the invention is as follows: a high-pressure hydrogen combined bottle mouth valve for a vehicle comprises a valve body, wherein the lower end of the valve body is provided with a screw joint for being inserted into a hydrogen storage bottle, the valve body is provided with an electromagnetic valve, a stop valve and a relief valve, and the valve body is also provided with a flow limiting valve, a temperature control relief device and a filtering mechanism;

a first channel, a second channel, a third channel, a fourth channel and a fifth channel which are connected in sequence are arranged in the valve body to form an inflation channel; the first channel is an upper through hole and a lower through hole which pass through a screw joint, the lower end of the first channel is used as a gas inlet and is connected with a hydrogen storage cylinder, the flow limiting valve is installed on the lower end of the first channel, the stop valve is installed on the upper end of the first channel, the third channel and the second channel are transversely arranged one above the other, the electromagnetic valve is installed in the third channel and is used for controlling the connection and disconnection of the third channel and the second channel, one end of the fourth channel is used as a gas filling port and is provided with a plug, the other end of the fourth channel is communicated with the fifth channel, one end of the fifth channel is inserted into the filtering mechanism, so that gas in the fourth channel enters the fifth channel after being filtered, and the other end of the fifth channel is used as a gas outlet;

an L-shaped temperature relief channel formed by a first temperature relief branch and a second temperature relief branch which are communicated with each other is arranged in the valve body; the first temperature release branch is parallel to the first channel and passes through the screw joint, the temperature control release device is installed in the first temperature release branch, and when the temperature reaches a set value, the temperature control release device is opened to enable gas in the hydrogen storage cylinder to be released through the first temperature release branch and the second temperature release branch;

an L-shaped discharge passage formed by a first discharge branch and a second discharge branch which are communicated with each other is arranged in the valve body; the first discharging branch and the first channel are arranged in parallel and pass through the screw joint, the discharging valve is installed in the second discharging branch, the discharging channel is communicated with the third channel through the sixth channel, when an emergency fault occurs, the discharging valve is opened, the sixth channel and the second discharging branch can be conducted, and therefore gas in the hydrogen storage cylinder sequentially enters the charging channel through the discharging channel and the sixth channel and is used for charging.

Preferably, the flow limiting valve comprises a flow limiting valve body, a second flow limiting channel, a third flow limiting channel and a fourth flow limiting channel are sequentially arranged in the flow limiting valve body from bottom to top, a first spring, a flow limiting valve core and an adjusting nut are sequentially arranged in the flow limiting valve body from top to bottom, the adjusting nut is screwed in the flow limiting valve body and internally provided with a first flow limiting channel, an airflow channel is reserved between a lower T-shaped section of the flow limiting valve core and the inner wall of the second flow limiting channel, an upper hollow cylinder is in sliding fit with the inner wall of the third flow limiting channel, the root of the upper hollow cylinder is provided with a radial hole, the outer wall of the lower T-shaped section is provided with a step inclined surface, the lower end of the first spring extends into the upper hollow cylinder, the upper end of the first spring abuts against the upper end surface of the third flow limiting channel, and when the flow limiting valve core is only acted by the first spring, the first flow limiting channel, the second flow limiting channel and the third flow limiting channel, The third flow limiting channel and the fourth flow limiting channel form a through airflow channel, and when the lower T-shaped section is stressed to move upwards, the step inclined plane abuts against the boundary of the second flow limiting channel and the third flow limiting channel to cut off and limit the flow. The flow limiting valve adopts the elasticity of a spring to realize the control of the maximum pressure and the reset of the valve core, thereby making sharp response to the change of the flow of the gas medium; the flow limiting valve is simple in structure, convenient to install, low in cost, good in safety performance, capable of achieving active emergency disposal protection, reducing leakage points of a hydrogen supply system, good in sealing performance and capable of effectively reducing economic cost of the fuel cell hydrogen supply system.

Preferably, the first flow limiting channel is a circumferentially and uniformly distributed hole arranged on the adjusting nut and around the axis, and the radial hole is a circumferentially and uniformly distributed hole arranged on the root of the upper hollow cylinder and around the axis.

Preferably, the temperature control relief device comprises a temperature control locking nut, a temperature sensing glass tube and a sliding movable valve core, wherein the temperature sensing glass tube and the sliding movable valve core are sequentially inserted into an inner cavity of the temperature control locking nut from bottom to top, a second spring is sleeved on a lower rod part of the sliding movable valve core, and an axial heat conduction hole and a radial heat conduction hole which are communicated with the inner cavity are formed in the top of the temperature control locking nut. Under the normal working condition, the sealing performance of the temperature control release device is safe and reliable; the safety channel can be started in time when an unexpected disaster occurs suddenly, so that the unexpected disaster is prevented from being further upgraded.

Preferably, the second spring is a butterfly-shaped elastic sheet, one end of the butterfly-shaped elastic sheet is assembled on the step surface of the sliding movable valve core, the other end of the butterfly-shaped elastic sheet is arranged on the step surface of the valve body, and the temperature control locking nut is screwed on the first temperature relief branch of the valve body.

Preferably, the temperature control lock nut and the sliding movable valve core are respectively provided with a groove for inserting and mounting the end of the temperature sensing glass tube.

Further preferably, filtering mechanism includes by preceding filter core, the spacing spring of filter core and the filter core end cap of arranging in proper order after to, the filter core end cap has the external screw thread and is used for the installation fixed, and the filter core adopts the cavity tube structure that the rear end is sealed, the front end is open, and longitudinal section is "n" shape, the spacing spring mounting of filter core is between filter core end cap and filter core. Simple structure, rationally distributed, reduce the leak source, the leakproofness is good, and it is convenient to change the filter core, effectively reduces fuel cell hydrogen supply system economic cost.

Preferably, a sealing ring is arranged between the end head of the filter element plug and the external thread section, a groove is formed in the bottom of the external thread section and used for installing the rear end of the filter element limiting spring, and the front end of the filter element limiting spring abuts against the closed end of the filter element.

Preferably, a wire harness installation channel which penetrates through the valve body up and down and passes through the screw joint is further arranged in the valve body, and the temperature sensor is arranged in the wire harness installation channel and can output a temperature signal sensed by the temperature probe through the wire harness; the temperature sensor comprises a wire passing nut, a wire harness, a temperature probe, a fixed pressure plate and a locking bolt; the upper end of the temperature probe is connected in the wire harness installation channel in combination with the O-shaped sealing ring, and the lower end of the temperature probe is arranged on the outer side of the lower part of the valve body; the fixed pressure plate fastens the temperature probe through a locking bolt; one end of the wire harness is connected with the temperature probe, and the other end of the wire harness penetrates through the wire passing nut; the wire passing nut is positioned at the top of the valve body and connected in the wire harness installation channel in parallel.

The invention has the beneficial effects that: the electromagnetic valve, the stop valve, the relief valve, the flow limiting valve, the temperature control relief device and the filtering mechanism are integrated on the valve body, the gas circuit in the valve body is reset, the gas supply channel, the relief channel, the gas filling channel, the temperature relief channel and the wiring harness installation channel are integrated, so that the number of joints and leakage points of a hydrogen supply system pipeline is reduced, the integration level of the combined bottle mouth valve is higher, the functions are more complete, the safety and the reliability of the system are higher, and particularly, the valve body is more compact and reasonable in structure due to the ingenious arrangement of the channels, partial communication and partial independence.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top sectional view of the top of fig. 1.

Fig. 3 is a sectional view of the pilot type solenoid valve.

Fig. 4 is a conducting cross-sectional view of the flow restriction valve.

Fig. 5 is a cut-off sectional view of the constrictor valve.

Fig. 6 is a cross-sectional view of a constrictor valve cartridge.

Fig. 7 is an exploded view of the filter mechanism.

Fig. 8 is a sectional view of the installation of the bleed valve on the bleed passage.

Fig. 9 is a sectional view showing the mounting of the temperature sensor on the harness mounting passage.

Fig. 10 is a cross-sectional view of a temperature controlled vent apparatus.

Fig. 11 is a cross-sectional view of a temperature controlled vent in a shut-off state.

Fig. 12 is a cross-sectional view of the conduction state of the temperature controlled release device.

Detailed Description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1 and 2, a high-pressure hydrogen combination cylinder valve for a vehicle includes a valve body 2, a screw connector at the lower end of the valve body 2 for inserting into a hydrogen storage cylinder, and a cylinder valve installed at the cylinder opening of the hydrogen storage cylinder.

The valve body 2 is provided with an electromagnetic valve 1, a stop valve 3, a relief valve 6, a flow limiting valve 4, a temperature control relief device 8, a filtering mechanism 5, a temperature sensor 7 and the like. The top of the valve body 2 is provided with an electromagnetic valve 1, a stop valve 3, a filtering mechanism 5, a temperature control relief device 8 and a relief valve 6; the bottom of the valve body 2 is provided with a flow limiting valve 4 and a temperature sensor 7.

A first channel 26, a second channel 25, a third channel 22, a fourth channel 23 and a fifth channel 21 which are connected in sequence are arranged in the valve body 2 to form an inflation channel. An L-shaped temperature relief channel formed by a first temperature relief branch 210 and a second temperature relief branch 211 which are communicated with each other is arranged in the valve body 2. An L-shaped bleed passage formed by a first bleed branch 27 and a second bleed branch 28 communicating with each other is provided in the valve body 2. A harness installation passage 29 is also provided in the valve body 2. Wherein the charging channel is connected to the discharge channel via a sixth channel 24, at the end of which the discharge valve 6 is mounted. In a normal state, because the two passages of the relief valve 6 are not communicated, the charging passage and the relief passage are communicated through the sixth passage 24 only after the relief valve 6 is opened. The temperature release channel and the wiring harness installation channel are independent. The initial sections of the inflation channel, the discharge channel, the temperature discharge channel and the wiring harness installation channel are all arranged on the screw joint at the lower end of the valve body 2.

The specific structure of each channel is described below:

an inflation channel: the first passage 26 is an upper and lower through hole passing through a screw joint, the lower end is used as an air inlet a for connecting with a hydrogen storage cylinder and mounting the flow limiting valve 4, and the upper end is mounted with the stop valve 3. The third channel 22 and the second channel 25 are transversely arranged one above the other, and the electromagnetic valve 1 is installed in the third channel 22 and used for controlling the connection and disconnection of the third channel 22 and the second channel 25. One end of the fourth channel 23 is used as an air charging port c and is connected with a front end hydrogen charging port of the pipeline, the other end of the fourth channel is communicated with the fifth channel 21, one end of the fifth channel 21 is inserted into the filtering mechanism 5, so that the gas in the fourth channel 23 enters the fifth channel 21 after being filtered, and the other end of the fifth channel 21 is used as an air outlet b.

When gas in the hydrogen storage cylinder is required to be used for supplying gas to the fuel cell at the rear end of the pipeline, the gas supply route is as follows in sequence: air inlet a, first channel 26, second channel 25, third channel 22, fourth channel 23, fifth channel 21, air outlet b.

When the gas is required to be charged into the hydrogen storage cylinder by using the gas charging port c, gas is charged at the gas charging port c, the main control valve on the pipeline at the rear end of the gas outlet b is closed, and the gas charging routes are as follows in sequence: the charging port c, the fourth channel 23, the third channel 22, the second channel 25, the first channel 26 and the gas inlet a enter the hydrogen storage cylinder.

A temperature release channel: an L-shaped temperature relief channel formed by a first temperature relief branch 210 and a second temperature relief branch 211 which are communicated with each other is arranged in the valve body 2. The first temperature relief branch 210 is parallel to the first channel 26 and passes through a screw joint, a temperature control relief device 8 is installed in the first temperature relief branch 210, and when the temperature reaches a set value, the temperature control relief device 8 is opened to enable gas in the hydrogen storage cylinder to be released through the first temperature relief branch 210 and the second temperature relief branch 211. It is necessary that an interface for discharging the bleed gas to the outside of the vehicle be provided at the end of the second warm bleed branch 211. The temperature and leakage route is as follows in sequence: a first temperature relief branch 210 and a second temperature relief branch 211.

A discharge passage: an L-shaped bleed passage formed by a first bleed branch 27 and a second bleed branch 28 communicating with each other is provided in the valve body 2. A first bleed branch 27 is arranged parallel to the first passage 26 and passes through the screw joint. A bleed valve 6 is mounted in the second bleed branch 28, and the bleed passage communicates with the fourth passage 23 via a sixth passage 24. When an emergency fault occurs, the relief valve 6 is opened, so that the sixth channel 24 and the second relief branch 28 are conducted, and the gas in the hydrogen storage cylinder sequentially passes through the relief channel, the sixth channel 24, the fourth channel 23 and the fifth channel 21 and is output through the gas outlet b to be used for supplying gas to the fuel cell at the rear end of the pipeline. The discharge route is as follows in sequence: a first bleed branch 27, a second bleed branch 28, a sixth passage 24, a fourth passage 23, a fifth passage 21, and an air outlet b.

The specific structure of each component is described as follows:

referring to fig. 1 and 3, the solenoid valve 1 is a pilot-operated solenoid valve, which is disposed in the third passage 22 and is used to control a communication state between the third passage 22 and the second passage 25; in the normal state, the pilot operated solenoid valve is in a normally closed state, as shown in fig. 1.

The pilot-operated electromagnetic valve comprises an electromagnetic valve non-magnetic tube 11, one end of the electromagnetic valve non-magnetic tube 11 is arranged in the third channel 22, and a third spring 12, a movable iron core 14 and a pilot plug 15 are arranged in the electromagnetic valve non-magnetic tube 11. One end of a third spring 12 is connected with the solenoid valve non-magnetic pipe 11, the other end of the third spring 12 is connected with a movable iron core 14, the movable iron core 14 is connected with a pilot plug 15, the third spring 12 is used for providing thrust for the pilot plug 15, the pilot plug 15 is used for sealing a third channel 22, the lower end of the third channel 22 is cut off from a second channel 25, and the gas circuit cut-off state is achieved. The solenoid valve coil 13 is positioned on the outer side of the valve body 2 and is sleeved with the solenoid valve non-magnetic pipe 11. When gas in the gas storage cylinder is released, the electromagnetic valve coil 13 is electrified to provide pulling force for the movable iron core 14, the direction of the pulling force is opposite to the direction of the pushing force of the third spring 12, the movable iron core 14 overcomes the pushing force of the third spring 12, the pilot plug 15 is driven to move, the lower end of the third channel 22 is communicated with the second channel 25, and the gas circuit can be controlled to be conducted.

As shown in fig. 1, the shut-off valve 3 is disposed in the first passage 26, and the shut-off valve 3 is preferably a manual shut-off valve. A manual shutoff valve is used to control the communication state between the second passage 25 and the first passage 26; in a normal state, the manual stop valve is in a normally open state, and the second channel 25 is communicated with the first channel 26; when the pilot-operated solenoid valve fails, the manual stop valve can be locked and closed to stop the second channel 25 and the first channel 26, so that gas leakage is avoided.

The manual shut-off valve includes a lock nut 31, and the lock nut 31 is threadedly coupled in the first passage 26. The adjusting rod 32 is connected in the locking nut 31 in a threaded manner, and the sealing plug 33 is arranged at the end part of the adjusting rod 32 and is tightly embedded; the air passage between the second passage 25 and the first passage 26 is cut off by screwing the adjusting rod 32 downwards and further sealing the plug 33 to block the first passage 26.

Referring to fig. 1, 4 to 6, the constrictor valve 4 is composed of a constrictor valve body 41, a first spring 44, a constrictor valve core 42, and an adjustment nut 43. A second flow limiting channel 412, a third flow limiting channel 413 and a fourth flow limiting channel 414 which are connected in sequence from bottom to top are arranged in the flow limiting valve body 41. A first spring 44, a flow limiting valve core 42 and an adjusting nut 43 are sequentially arranged in the flow limiting valve body 41 from top to bottom. The adjusting nut 43 is screwed in the valve body 41 of the flow limiting valve, and a first flow limiting channel 411 is formed in the adjusting nut 43.

The flow limiting valve core 42 is divided into a lower T-shaped section 424 and an upper hollow cylinder 421, the flow limiting valve core 42 is arranged in the flow limiting second channel 412 and the flow limiting third channel 413, and the flow limiting valve core 42 can move up and down between the two channels. An air flow channel is reserved between the lower T-shaped section 424 and the inner wall of the second flow limiting channel 412, and the upper hollow cylinder 421 is in sliding fit with the inner wall of the third flow limiting channel 413. The root of the upper hollow cylinder 421 is provided with a radial hole 422, the outer wall of the lower T-shaped section 424 is provided with a step inclined plane 423, the lower end of the first spring 44 extends into the upper hollow cylinder 421, and the upper end of the first spring abuts against the upper end surface of the third flow limiting passage 413. When the flow limiting valve core 42 is only acted by the first spring 44, the first flow limiting channel 411, the second flow limiting channel 412, the third flow limiting channel 413 and the fourth flow limiting channel 414 form a through air flow channel, and when the lower T-shaped section 424 is forced to move upwards, the step inclined surface 423 abuts against the boundary of the second flow limiting channel 412 and the third flow limiting channel 413 to stop and limit the flow.

Preferably, the first flow restricting passages 411 are circumferentially distributed holes around the axis on the adjusting nut 43, and the radial holes 422 are circumferentially distributed holes around the axis on the root of the upper hollow cylinder 421 for communicating with the third flow restricting passages 413, four of which are shown, but not limited thereto.

The flow limiting valve core 42 moves upwards to a step surface formed by the boundary of the step inclined plane 423 and the second flow limiting channel 412 and the third flow limiting channel 413, the radial hole 422 on the upper section side wall of the flow limiting valve core 42 is positioned in the third flow limiting channel 413, the step inclined plane 423 of the flow limiting valve core 42 is closed when being abutted with the steps between the second flow limiting channel 412 and the third flow limiting channel 413, the second flow limiting channel 412 and the third flow limiting channel 413 are in a stop state, the flow limiting valve is actively closed for limiting flow, gas cannot flow out through the fourth flow limiting channel 414, and a large amount of gas media is prevented from being lost.

Referring to fig. 2 and 7, the filter mechanism 5 includes a filter element 53, a filter element limiting spring 52 and a filter element plug 51, which are sequentially arranged from front to back. The filter element plug 51 is provided with external threads for installation and fixation, the filter element 53 is of a hollow cylinder structure with a closed rear end and an open front end, the longitudinal section of the filter element 53 is n-shaped, and the filter element limiting spring 52 is arranged between the filter element plug 51 and the filter element 53.

Preferably, a sealing ring is arranged between the end head of the filter element plug 51 and the external thread section, the bottom of the external thread section is provided with a groove for installing the rear end of the filter element limiting spring 52, and the front end of the filter element limiting spring 52 abuts against the closed end of the filter element 53.

The filtering mechanism 5 is connected in the fifth channel 21 through a filter core plug 51 in a threaded manner, and the medium gas in the fourth channel 23 enters the fifth channel 21 through the filter core 53 and is discharged from the gas outlet b, so that components at the rear end of the pipeline system are protected. The structure of the filtering mechanism 5 is more convenient for installation and filter element replacement.

As shown in fig. 2 and 8, an L-shaped bleed passage formed by a first bleed branch 27 and a second bleed branch 28 communicating with each other is provided in the valve body 2. The charge passage is connected to the bleed passage via a sixth passage 24, and a bleed valve 6 is provided in the second bleed branch 28 for controlling the communication between the sixth passage 24 and the second bleed branch 28. In a normal state, the sixth passage 24 and the second relief branch 28 are in a blocking state, and the relief valve 6 is in a normally closed state; in the event of an emergency, the bleed valve 6 is unscrewed, the sixth passage 24 and the second bleed branch 28 are opened and gas can be released. The relief valve 6 has the same construction as the manual shut-off valve and will not be described in detail.

As shown in fig. 2 and 9, a harness installation passage 29 that passes through the screw joint is also provided in the valve body 2. The temperature sensor 7 is disposed in the harness installation passage 29, and can output a temperature signal sensed by the temperature probe 75 through the harness 72. The temperature sensor 7 mainly comprises a wire through nut 71, a wire harness 72, a temperature probe 76, a fixed pressure plate 74 and a locking bolt 75. The upper end of the temperature probe 76 is connected with the wiring harness installation channel 29 by combining the O-shaped sealing ring 73, and the lower end is arranged on the outer side of the lower part of the valve body 2; the fixed platen 74 fastens the temperature probe 76 by a lock bolt 75; one end of the wiring harness 72 is connected with the temperature probe 76, and the other end of the wiring harness passes through the wiring nut 71; the wire passing nut 71 is positioned at the top of the valve body 2 and is connected in the wire harness installation passage 29.

Referring to fig. 2, 11 and 12, the temperature-controlled release device 8 mainly comprises a temperature-controlled lock nut 81, a second spring 84, a temperature-sensitive glass tube 82 and a sliding valve core 83, which are inserted into an inner cavity of the temperature-controlled lock nut 81 from bottom to top. The second spring 84 is sleeved on the lower rod part of the sliding movable valve core 83, and the top of the temperature control locking nut 81 is provided with an axial heat conduction hole 811 and a radial heat conduction hole 812 which are communicated with the inner cavity.

The second spring 84 is preferably a butterfly spring, one end of the butterfly spring is assembled on the step surface of the sliding movable valve element 83, the other end is arranged on the step surface of the valve body 2, and the temperature control locking nut 81 is screwed on the first temperature relief branch 210 of the valve body 2. The temperature control relief device 8 is used for controlling the communication state between the first temperature relief branch 210 and the second temperature relief branch 211. Under a normal state, the first temperature relief branch 210 and the second temperature relief branch 211 are in a cut-off state to form a sealed and closed structure.

The temperature control lock nut 81 and the sliding valve core 83 are preferably provided with grooves for inserting and mounting the end of the temperature sensing glass tube 82.

When an accident disaster occurs around the gas cylinder, the part of the gas cylinder valve meets sudden temperature shock, and high-temperature heat flows rapidly permeate into the periphery of the temperature sensing glass tube 82 in the temperature control discharge device through the axial heat conduction hole 811 and the radial heat conduction hole 812 at the end part of the temperature control locking nut 81; when the environmental temperature rises to 110 +/-5 ℃, the temperature-sensitive glass tube 82 is exploded when reaching the temperature set for explosion; due to the burst of the temperature sensing glass tube, the single side of the sliding movable valve core 83 loses the supporting force, the sliding movable valve core 83 pushes the sliding movable valve core 83 to move towards the direction of the temperature control locking nut 81 under the combined action of the gas pressure in the bottle and the elastic force of the second spring 84, and then the original sealing structure form is broken, so that the first temperature relief branch 210 and the second temperature relief branch 211 are in a conducting state, and the high-pressure gas in the bottle is exhausted.