CN110630786A

CN110630786A - Air inlet and outlet structure of high-pressure bottle mouth valve

Info

Publication number: CN110630786A
Application number: CN201910862662.2A
Authority: CN
Inventors: 葛安全; 何春辉; 赵亚丽; 陈甲楠; 许春华; 王朝; 王学圣
Original assignee: Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd; Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
Current assignee: Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd; Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2019-12-31

Abstract

The invention discloses a gas inlet and outlet structure of a high-pressure bottle mouth valve, which comprises a main valve body with a connecting column body, wherein a vertical gas flow passage, a first horizontal gas flow passage and a second horizontal gas flow passage are arranged in the main valve body; the second horizontal gas flow channel forms a second opening on the side surface of the main valve body; a first branch gas flow channel is arranged at the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel, and the electromagnetic valve hermetically extends into the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel through the first branch gas flow channel; and a second branch gas flow passage is arranged at the intersection of the first horizontal gas flow passage and the second horizontal gas flow passage, and the manual stop valve hermetically extends into the intersection of the first horizontal gas flow passage and the second horizontal gas flow passage through the second branch gas flow passage. The structure is simple and compact, the processing and the assembly are convenient, the leakage point is less, the integration level is high, and the cost is low.

Description

Air inlet and outlet structure of high-pressure bottle mouth valve

Technical Field

The invention relates to the technical field of hydrogen storage, in particular to an air inlet and outlet structure of 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 gas inlet and outlet structure of the common high-pressure bottle mouth valve in the market is that a main valve body of the bottle mouth valve is externally connected with a single valve element and a component with corresponding functions through an external pipeline, and the single valve element and the component are distributed around the main valve body in a split-type manner and are connected in series on a gas flow passage for gas inlet and outlet. The above structure has the following disadvantages: the external pipelines are large in quantity and complex in layout, and the integral structure of the bottle mouth valve occupies a large space; secondly, the hydrogen leakage phenomenon is easy to occur in the using process, and the safety and the reliability are very low.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the air inlet and outlet structure of the high-pressure bottle mouth valve is simple and compact in structure, convenient to process, light in weight and highly integrated.

In order to solve the problems, the invention adopts the technical scheme that: the air inlet and outlet structure of the high-pressure bottle mouth valve comprises: the hydrogen storage cylinder is arranged at the bottom of the main valve body, a connecting cylinder capable of extending into a mouth of the hydrogen storage cylinder is arranged at the bottom of the main valve body, a gas flow channel is arranged in the main valve body, the gas flow channel is formed by sequentially connecting a vertical gas flow channel, a first horizontal gas flow channel and a second horizontal gas flow channel, the vertical gas flow channel is vertically intersected with the first horizontal gas flow channel, the first horizontal gas flow channel is intersected with the second horizontal gas flow channel, the vertical gas flow channel penetrates through the bottom surface of the connecting cylinder to form a first opening at the bottom surface of the connecting cylinder, the flow limiting valve is arranged in the first opening in a sealing mode, and the second horizontal gas flow channel penetrates through the side surface of the main valve; a first branch gas flow channel is arranged at the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel, the first branch gas flow channel penetrates through the side face of the main valve body, a first connecting port is formed in the side face of the main valve body, the electromagnetic valve hermetically extends into the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel through the first connecting port, the electromagnetic valve blocks the vertical gas flow channel from communicating with the first horizontal gas flow channel when the electromagnetic valve is in an unopened state, and the vertical gas flow channel is unblocked from the first horizontal gas flow channel when the electromagnetic valve is in an opened state; the first horizontal gas flow channel and the second horizontal gas flow channel are intersected to form a first connector, the manual stop valve hermetically extends into the intersection of the first horizontal gas flow channel and the second horizontal gas flow channel through the first connector, the manual stop valve is in an unopened state and blocks the first horizontal gas flow channel from flowing through the second horizontal gas flow channel, and when the manual stop valve is in an opened state, the first horizontal gas flow channel and the second horizontal gas flow channel are unblocked.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, the first horizontal gas flow channel is communicated with the second branch gas flow channel, the first horizontal gas flow channel and the second branch gas flow channel are coaxial, and the second horizontal gas flow channel penetrates through the side wall of the second branch gas flow channel to form a first branch port on the side wall of the second branch gas flow channel; a third horizontal gas flow channel is also arranged on the side wall of the second branch gas flow channel, the third horizontal gas flow channel penetrates through the side wall of the second branch gas flow channel and forms a second branch port on the side wall of the second branch gas flow channel, and the third horizontal gas flow channel penetrates through the side surface of the main valve body and forms a third opening on the side surface of the main valve body; the manual stop valve stretches into the first horizontal gas flow channel through the second connecting port in a sealing mode, the first horizontal gas flow channel and the second branch gas flow channel are blocked to circulate when the manual stop valve is in an unopened state, the first horizontal gas flow channel and the second branch gas flow channel are unblocked when the manual stop valve is in an opened state, and gas output from the first horizontal gas flow channel enters the second branch gas flow channel and then is divided into two paths of flow through the first flow dividing port and the second flow dividing port.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, a pressure measurement channel is further arranged on the second horizontal air flow channel or the third horizontal air flow channel, the pressure measurement channel penetrates through the side face of the main valve body, a fourth opening is formed in the side face of the main valve body, and the pressure sensor is hermetically arranged in the pressure measurement channel through the fourth opening.

Further, the air inlet and outlet structure of the high-pressure bottle mouth valve comprises: the flow-limiting valve body is provided with a first channel, a second channel, a third channel and a fourth channel in sequence from top to bottom in the middle of the top surface of the flow-limiting valve body, and the inner apertures of the first channel, the second channel, the third channel and the fourth channel are reduced in sequence to form a step hole structure; the sliding valve core is movably inserted in the second channel and the third channel, a convex ring which protrudes outwards is arranged at the top of the sliding valve core, the convex ring is movably arranged in the second channel, and the connecting sleeve is fixed in the first channel; a spring is sleeved on the sliding valve core, the bottom end of the spring abuts against a step surface formed between the second channel and the third channel, and the top end of the spring abuts against the bottom surface of the convex ring to enable the top surface of the convex ring to abut against the connecting sleeve; a first gas flow channel is inwards arranged in the middle of the top surface of the sliding valve core, a second gas flow channel is inwards arranged in the middle of the bottom surface of the sliding valve core, the first gas flow channel is communicated with the second gas flow channel through a middle throttling hole, a plurality of first through holes communicated with the first gas flow channel are arranged on the side wall of the upper section of the sliding valve core at intervals, and a plurality of second through holes communicated with the second gas flow channel are arranged on the side wall of the lower section of the sliding valve core at intervals; when the sliding valve core moves downwards until the bottom surface of the sliding valve core abuts against a step table surface formed between the third channel and the fourth channel, each second through hole on the sliding valve core is positioned in the third channel, and gas flows out of the fourth channel through the connecting sleeve, the first gas flow channel, the middle throttling hole and the second gas flow channel; when the slide valve core is only under the action of the elastic force of the spring, the top surface of the lower flange is abutted against the connecting sleeve under the action of the spring, each first through hole and each second through hole are positioned in the second channel, and gas passes through the connecting sleeve and the first gas flow channel and then is divided into two paths: one path is collected in the second gas flow channel through the middle throttling hole, the other path is collected in the second gas flow channel through the first through hole, the interlayer gap between the sliding valve core and the second channel and the second through hole, and then the gas flows out of the second gas flow channel and the fourth channel in a unified mode.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, the inner hole of the connecting sleeve is a prismatic hole.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, the flow limiting valve body is formed by integrally molding a first cylinder, a second cylinder and a third cylinder from top to bottom in sequence, the outer diameters of the first cylinder, the second cylinder and the third cylinder are reduced in sequence to form a step shaft structure, and the flow limiting valve is installed in the first opening through the third cylinder; a plurality of platforms are cut on the first column body at intervals along the circumferential direction.

Further, the aforementioned air inlet and outlet structure of the high-pressure bottle neck valve, wherein the structure of the manual cut-off valve comprises: the stop valve body is arranged in the second branch gas flow passage through the first sealing structure; the second branch gas flow channel is coaxial with the first horizontal gas flow channel and penetrates through the side wall of the bottom of the second branch gas flow channel; the middle part of the top surface of the stop valve body is provided with a connecting channel which is communicated up and down, an internal thread section is arranged in the connecting channel, the valve core is inserted and arranged in the connecting channel, an external thread section which is screwed with the internal thread section is arranged on the valve core, the valve core is screwed with the internal thread section through the external thread section so as to be screwed in the connecting channel, the bottom of the valve core is provided with a second sealing structure, and the valve core is rotated to enable the bottom of the valve core to extend out of the lower part of the stop valve body and then to be sealed and abutted against the opening of the first horizontal gas flow channel so as to; rotating the valve core in the opposite direction to enable the bottom of the valve core to be far away from the first horizontal gas flow channel opening, and the first horizontal gas flow channel and the second horizontal gas flow channel to be smooth; an annular groove which is recessed inwards is formed in the connecting channel below the internal thread section, and a third sealing structure which enables the valve core and the connecting channel to be sealed is arranged in the annular groove.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, an accommodating groove recessed inwards is formed in the upper portion of the connecting channel, and the threaded retaining ring is fixedly arranged in the accommodating groove; the connecting channel consists of a first connecting channel and a second connecting channel from top to bottom in sequence, the inner aperture of the first connecting channel is larger than that of the second connecting channel, and the internal thread section is arranged in the first connecting channel; the valve core is sequentially composed of a first cylinder, a second cylinder and a third cylinder from top to bottom, the outer diameter of the first cylinder is smaller than that of the second cylinder, the outer diameter of the second cylinder is larger than that of the third cylinder, and an external thread section is arranged on the second cylinder; when the valve core is positioned at the lower limit position, the step surface between the second cylinder and the third cylinder is placed on the step surface between the first connecting channel and the second connecting channel; when the valve core is positioned at the upper limit position, the step surface between the first cylinder and the second cylinder is abutted against the bottom surface of the threaded retaining ring.

Further, in the air inlet and outlet structure of the high-pressure bottle neck valve, the inner hexagonal hole is formed inwards in the middle of the top surface of the valve core.

Further, the air inlet and outlet structure of the high-pressure bottle neck valve is characterized in that the first sealing structure is: the valve body consists of an upper valve body and a lower valve body, the outer diameter of the upper valve body is larger than that of the lower valve body, and a first O-shaped sealing ring is arranged on a step surface between the upper valve body and the lower valve body; the second sealing structure is as follows: a connecting column is arranged at the bottom of the valve core, the outer diameter of the connecting column is smaller than that of the third cylinder, and a second O-shaped sealing ring is hooped on the connecting column; the third sealing structure is a first check ring and a third O-shaped sealing ring which are arranged in the annular groove.

The invention has the beneficial effects that: the structure is simple and compact, the processing and the assembly are convenient, the weight is light, the volume is small, the leakage point is less, the sealing performance is good, the integration level is high, and the cost is greatly reduced.

Drawings

Fig. 1 is a schematic perspective view of a high-pressure bottle mouth valve according to the present invention, applied to a bottle mouth valve.

Fig. 2 is a schematic top view of the mouthpiece valve of fig. 1.

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

Fig. 4 is a schematic structural diagram of the main valve body in the direction B in fig. 2.

Fig. 5 is a schematic view of the structure in the sectional direction D-D in fig. 4.

Fig. 6 is a schematic view of the structure of the flow restriction valve.

Fig. 7 is a schematic view of the internal structure of the flow restriction valve.

Fig. 8 is a schematic view of the internal structure of the flow restriction valve in another operation state.

Fig. 9 is a schematic structural view of the spool of fig. 8.

Fig. 10 is a schematic structural view of the manual cut-off valve.

Fig. 11 is a schematic view of the internal structure of the manual cut-off valve.

Fig. 12 is a schematic view of the internal structure of the manual cut-off valve in another operating state.

Fig. 13 is a schematic view of the internal structure of the solenoid valve.

Fig. 14 is a schematic view of a connection structure between the movable iron core, the movable valve spool, and the pilot valve body in fig. 13.

Fig. 15 is a schematic view of the movable core of fig. 13 after moving upward.

Fig. 16 is a schematic structural view of the solenoid valve 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.

Example one

As shown in fig. 1, 2, 3, 4, and 5, the air inlet and outlet structure of a high-pressure bottle neck valve according to the present embodiment includes: the main valve body 1, there is a connection column 11 that can stretch into the mouth of the hydrogen storage cylinder at the bottom of the main valve body 1. For convenience of description, a plane where the top surface of the main valve body 1 is located is defined as a horizontal plane, and the axial direction of the connecting column is defined as a vertical direction. And the direction from the top surface of the main valve body 1 to the bottom surface of the connecting column body is defined as the direction from top to bottom. A gas flow channel is arranged in the main valve body and is formed by sequentially connecting a vertical gas flow channel 12, a first horizontal gas flow channel 13 and a second horizontal gas flow channel 14, the vertical gas flow channel 12 is vertically intersected with the first horizontal gas flow channel 13, the first horizontal gas flow channel 13 is intersected with the second horizontal gas flow channel 14, the vertical gas flow channel 12 penetrates through the bottom surface of the connecting column body 11 and forms a first opening 101 in the bottom surface of the connecting column body 11, the flow limiting valve 2 is hermetically arranged in the first opening 101, and the second horizontal gas flow channel 14 penetrates through the side surface of the main valve body 1 and forms a second opening 102 in the side surface of the main valve body 1. A first branch gas flow passage 15 is arranged at the vertical intersection of the vertical gas flow passage 12 and the first horizontal gas flow passage 13, the first branch gas flow passage 15 penetrates through the side face of the main valve body 1, a first connecting port 103 is formed at the side face of the main valve body 1, the electromagnetic valve 3 hermetically extends into the vertical intersection of the vertical gas flow passage 12 and the first horizontal gas flow passage 13 through the first connecting port 103, the vertical gas flow passage 12 and the first horizontal gas flow passage 13 are blocked from communicating when the electromagnetic valve 3 is not opened, and the vertical gas flow passage 12 and the first horizontal gas flow passage 13 are unblocked when the electromagnetic valve 3 is opened. A second branch gas flow passage 16 is arranged at the intersection of the first horizontal gas flow passage 13 and the second horizontal gas flow passage 14, the second branch gas flow passage 16 penetrates through the side face of the main valve body 1, a second connecting port 104 is formed on the side face of the main valve body 1, the manual stop valve 4 hermetically extends into the intersection of the first horizontal gas flow passage 13 and the second horizontal gas flow passage 14 through the second connecting port 104, the manual stop valve 4 is in an unopened state and blocks the first horizontal gas flow passage 13 from communicating with the second horizontal gas flow passage 14, and when the manual stop valve 4 is in an opened state, the first horizontal gas flow passage 13 is unblocked from the second horizontal gas flow passage 14.

As shown in fig. 3 and 5, in the present embodiment, the first horizontal gas channel 13 is communicated with the second branch gas channel 16, the first horizontal gas channel 13 is coaxial with the second branch gas channel 16, and the second horizontal gas channel 14 penetrates through the sidewall of the second branch gas channel 16 to form a first branch port 141 on the sidewall of the second branch gas channel 16; a third horizontal gas flow path 17 is further provided in the side wall of the second branch gas flow path 16, the third horizontal gas flow path 17 penetrates the side wall of the second branch gas flow path 16 to form a second branch port 171 in the side wall of the second branch gas flow path 16, and the third horizontal gas flow path 17 penetrates the side surface of the main valve body 1 to form a third port 105 in the side surface of the main valve body 1. The manual stop valve 4 is hermetically extended into the first horizontal gas channel 13 through the second connection port 104, and when the manual stop valve 4 is in an unopened state, the first horizontal gas channel 13 and the second branch gas channel 16 are blocked from flowing through, when the manual stop valve 4 is in an opened state, the first horizontal gas channel 13 and the second branch gas channel 16 are unblocked, and after the gas output from the first horizontal gas channel 13 enters the second branch gas channel 16, the gas is divided into two paths through the first branch port 141 and the second branch port 161.

In actual use, only one of the second opening 102 and the third opening 105 is used, and the other opening is sealed and not used.

When the second opening 102 is in use and the third opening 105 is sealed off from use: during gas charging, gas enters the hydrogen storage cylinder through the second opening 102, the second horizontal gas flow channel 14, the manual stop valve 4, the electromagnetic valve 3, the vertical gas flow channel 12 and the flow limiting valve 2. When in deflation, the gas flows out of the bottleneck valve through the flow limiting valve 2, the vertical gas flow passage 12, the electromagnetic valve 3, the manual stop valve 4, the second horizontal gas flow passage 14 and the second opening 102.

When the third opening 105 is in use and the second opening 102 is sealed off from use: during gas charging, gas enters the hydrogen storage cylinder through the third opening 105, the third horizontal gas flow passage 17, the manual stop valve 4, the electromagnetic valve 3, the vertical gas flow passage 12 and the flow limiting valve 2. During air relief, air flows out of the bottle mouth valve through the flow limiting valve 2, the vertical air flow channel 12, the electromagnetic valve 3, the manual stop valve 4, the third horizontal air flow channel 17 and the third opening 105.

The gas flow channels in the bottleneck valve are distributed, and the integrated positions of the electromagnetic valve 3, the flow limiting valve 2 and the manual stop valve 4 are distributed, so that the bottleneck valve is simple and compact as a whole, convenient to machine and assemble, light in weight, small in size, low in leakage point, good in sealing performance, high in integration level, and greatly reduced in cost.

As shown in fig. 5, in the present embodiment, a pressure measurement channel 18 is further provided on the second horizontal gas flow channel 14 or the third horizontal gas flow channel 17, the pressure measurement channel 18 penetrates through the side surface of the main valve body 1, a fourth opening 106 is formed on the side surface of the main valve body 1, and the pressure sensor is sealingly provided in the pressure measurement channel 18 through the fourth opening 106.

Example two

In the present embodiment, on the basis of the first embodiment, the specific flow limiting valve 2 is structurally designed as follows.

For convenience of description, an end of the flow restriction valve 2 located outside the main valve body 1 is referred to as a top portion, and an end of the flow restriction valve 2 located inside the main valve body 1 is referred to as a bottom portion.

As shown in fig. 6, 7, 8, and 9, the structure of the constrictor valve 2 described in this embodiment includes: the flow-limiting valve body 21 is provided with a first channel 210, a second channel 211, a third channel 212 and a fourth channel 213 from top to bottom in sequence in the middle of the top surface of the flow-limiting valve body 21, and the inner apertures of the first channel 210, the second channel 211, the third channel 212 and the fourth channel 213 are reduced in sequence to form a step hole structure. The sliding valve core 22 is movably inserted in the second channel 211 and the third channel 212, a convex ring 220 protruding outwards is arranged at the top of the sliding valve core 22, the convex ring 220 is movably arranged in the second channel 211, and the connecting sleeve 23 is fixed in the first channel 210; in this embodiment, the inner hole of the connecting sleeve 23 is a prismatic hole, and the prismatic hole is convenient for an operator to rotate the connecting sleeve 23, so that the connecting sleeve 23 is fixed in the first channel 210.

As shown in fig. 7 and 8, the sliding valve core 22 is sleeved with a spring 24, the bottom end of the spring 24 abuts against a step surface formed between the second passage 211 and the third passage 212, and the top end of the spring 24 abuts against the bottom surface of the convex ring 220, so that the top surface of the convex ring 220 abuts against the connecting sleeve 23. A first gas flow channel 221 is formed in the middle of the top surface of the slide valve core 22 inwards, a second gas flow channel 222 is formed in the middle of the bottom surface of the slide valve core 22 inwards, the first gas flow channel 221 is communicated with the second gas flow channel 222 through a middle throttling hole 223, a plurality of first through holes 224 communicated with the first gas flow channel 221 are formed in the side wall of the upper section of the slide valve core 22 at intervals, and a plurality of second through holes 225 communicated with the second gas flow channel 222 are formed in the side wall of the lower section of the slide valve core 22 at intervals; when the slide valve core 22 moves downwards until the bottom surface of the slide valve core 22 abuts against a step surface formed between the third channel 212 and the fourth channel 213, each second through hole 225 on the slide valve core 22 is positioned in the third channel 212, and gas flows out of the fourth channel 213 through the connecting sleeve 23, the first gas flow channel 221, the middle throttling hole 223 and the second gas flow channel 222; when the slide valve core 3 is only acted by the elastic force of the spring 24, the top surface of the convex ring 220 is abutted against the connecting sleeve 23 under the action of the spring 24, each first through hole 224 and each second through hole 225 are positioned in the second channel 211, and the gas is divided into two paths after passing through the connecting sleeve 23 and the first gas flow channel 221: one of the two paths is collected in the second gas flow passage 222 through the intermediate throttle hole 223, and the other path is collected in the second gas flow passage 222 through the first through hole 224, the sandwich gap between the spool 22 and the second passage 211, and the second through hole 225, and then flows out from the second gas flow passage 222 and the fourth passage 213 in a unified manner.

In this embodiment, the flow-limiting valve body 21 is formed by integrally molding a first cylinder 214, a second cylinder 215, and a third cylinder 216 from top to bottom in sequence, the outer diameters of the first cylinder 214, the second cylinder 215, and the third cylinder 216 are sequentially reduced to form a step shaft structure, and the flow-limiting valve 2 is installed in the first opening 101 through the third cylinder 216. A plurality of platforms 217 are cut on the first cylinder 214 at intervals along the circumferential direction, the restriction valve body 21 and the first opening 101 are usually fixed through threaded connection, and the platforms 217 are arranged to facilitate an operator to screw the restriction valve 2 in the first opening 101.

Under the normal condition of the gas pressure of the hydrogen storage cylinder, the elastic force exerted by the spring 24 on the sliding valve core 22 is balanced with the gas pressure protection, and the sliding valve core 22 keeps an open state, namely: the gas is divided into two paths after passing through the connecting sleeve 23 and the first gas flow channel 221: one of the two paths is collected in the second gas flow passage 222 through the intermediate throttle hole 223, and the other path is collected in the second gas flow passage 222 through the first through hole 224, the sandwich gap between the spool 22 and the second passage 211, and the second through hole 225, and then flows out from the second gas flow passage 222 and the fourth passage 213 in a unified manner.

When an uncontrollable accident occurs, if a large amount of gas in the hydrogen storage cylinder flows out due to damage of an external device of the hydrogen storage cylinder, the gas pressure exceeds the elastic force applied to the sliding valve core 22 by the spring 24, the sliding valve core 2 overcomes the elastic force of the spring 24 to move downwards under the action of the gas pressure, the spring 24 is compressed until each second through hole 225 on the sliding valve core 22 is positioned in the third channel 212, and at the moment, the path of the gas flowing out from the fourth channel 213 is blocked after passing through the connecting sleeve 23 and the first gas flow channel 221, passing through the first through hole 224, the interlayer gap between the sliding valve core 22 and the second channel 211, the second through hole 225 and the second gas flow channel 222, so that the gas is prevented from flowing out abnormally. And the gas flows out normally through the connecting sleeve 23, the first gas flow passage 221, the middle throttling hole 223, the second gas flow passage 222 and the fourth passage 213, so that a small amount of gas flows out.

EXAMPLE III

In the present embodiment, on the basis of the first embodiment, the specific manual cut-off valve 4 is structurally designed as follows.

For convenience of description, an end of the manual cut-off valve 4 located outside the main valve body 1 is referred to as a top portion, and an end of the manual cut-off valve 4 located inside the main valve body 1 is referred to as a bottom portion.

As shown in fig. 10, 11, and 12, the structure of the manual cut-off valve 4 described in the present embodiment includes: the shutoff valve body 41 is provided with a first seal structure on the outer side wall of the shutoff valve body 41, and the shutoff valve body 41 is provided in the second branch gas flow passage 16 by the first seal structure. The first sealing structure is as follows: the valve body 41 is composed of an upper valve body 410 and a lower valve body 411, the outer diameter of the upper valve body 410 is larger than that of the lower valve body 411, and the first O-ring 51 is arranged on a step surface 413 between the upper valve body 410 and the lower valve body 411.

The second branch gas channel 16 is coaxial with the first horizontal gas channel 13, and the second horizontal gas channel 14 penetrates through the side wall of the second branch gas channel 16 to form a first branch port 141 on the side wall of the second branch gas channel 16; a third horizontal gas flow path 17 is further provided in the side wall of the second branch gas flow path 16, the third horizontal gas flow path 17 penetrates the side wall of the second branch gas flow path 16 to form a second branch port 171 in the side wall of the second branch gas flow path 16, and the third horizontal gas flow path 17 penetrates the side surface of the main valve body 1 to form a third port 105 in the side surface of the main valve body 1.

As shown in fig. 11 and 12, a connecting passage 42 is formed in the middle of the top surface of the stop valve body 41 to extend vertically, an internal thread section is provided in the connecting passage 42, a valve body 43 is inserted into the connecting passage 42, an external thread section screwed with the internal thread section is provided on the valve body 43, the valve body 43 is screwed into the connecting passage 42 by screwing the external thread section and the internal thread section, in this embodiment, an internal hexagonal hole 431 is formed in the middle of the top surface of the valve body 43, and the internal hexagonal hole 431 is provided to facilitate the operator to rotate the valve body 43. A second sealing structure is arranged at the bottom of the valve core 43, and the valve core 43 is rotated to enable the bottom of the valve core 43 to extend out of the lower part of the stop valve body 41 and then to be in sealing contact with the opening of the first horizontal gas flow channel 13 so as to block the first horizontal gas flow channel 13 from communicating with the second branch gas flow channel 16; the valve core 43 is rotated in the opposite direction to open the first horizontal gas channel 13 and the second branch gas channel 16 at the bottom of the valve core 43 away from the first horizontal gas channel. An annular groove 44 recessed inward is formed in the connecting passage 42 below the female screw section, and a third seal structure for sealing the spool 43 with the connecting passage 42 is provided in the annular groove 44. The third sealing structure is a first retainer ring 53 and a third O-ring 54 disposed in the annular groove 44.

As shown in fig. 11 and 12, an accommodating groove 421 recessed inward is formed at an upper portion of the connecting channel 42, and the screw ring 45 is fixedly disposed in the accommodating groove 421. The connecting channel 42 is sequentially composed of a first connecting channel 422 and a second connecting channel 423 from top to bottom, the inner aperture of the first connecting channel 422 is larger than that of the second connecting channel 423, and the internal thread section is arranged in the first connecting channel 422. The valve core 43 is composed of a first cylinder 432, a second cylinder 433 and a third cylinder 434 from top to bottom in sequence, the outer diameter of the first cylinder 432 is smaller than that of the second cylinder 433, the outer diameter of the second cylinder 433 is larger than that of the third cylinder 434, and an external thread section is arranged on the second cylinder 433. When the spool 43 is located at the lower limit position, the step surface between the second cylinder 433 and the third cylinder 434 is rested on the step surface between the first connecting passage 422 and the second connecting passage 423; when the valve core 43 is located at the upper limit position, the step surface between the first cylinder 432 and the second cylinder 433 abuts against the bottom surface of the thread stop ring 45.

The manual stop valve 4 of an organic whole structure is simple and compact in structure, simple and convenient to install, good in sealing performance and few in leakage point. And the valve core 43 moves upwards and downwards to limit, so that the use is very convenient.

The second sealing structure in this embodiment is: a connecting column 431 is arranged at the bottom of the valve core 43, the outer diameter of the connecting column 431 is smaller than that of the third cylinder 434, and the second O-shaped sealing ring 52 is hooped on the connecting column 431.

Example four

In the present embodiment, a specific electromagnetic valve 3 is structurally designed based on the first embodiment, which is specifically as follows.

For convenience of description, an end of the solenoid valve 3 located outside the main valve body 1 is referred to as a top portion, and an end of the solenoid valve 3 located inside the main valve body 1 is referred to as a bottom portion.

As shown in fig. 13 and 14, the solenoid valve 3 according to the present embodiment includes: the pilot valve 31 is fixedly connected with a valve cover 32 at the upper section of the pilot valve 31, and the valve cover 32 covers the upper section of the pilot valve 31 in the valve cover 32. The outer side wall of the lower section of the valve cover 32 is provided with a total sealing structure; the total sealing structure is as follows: the valve cover 32 is formed with an inwardly recessed groove 321, and a sealing retainer 322 and a fourth O-ring 323 are disposed in the groove 320. The lower section of the pilot valve body 31 is sealingly connected to the first branch gas flow passage 15 by a main seal structure.

The first branch flow channel 15 is composed of a first section branch flow channel 151 and a second section branch flow channel 152 which are coaxial, the inner aperture of the first section branch flow channel 151 is larger than that of the second section branch flow channel 152, the second section branch flow channel 152 is coaxial with the first horizontal gas flow channel 13, and the inner aperture of the second section branch flow channel 152 is larger than that of the first horizontal gas flow channel 13; the vertical gas flow channel 12 penetrates through the bottom side wall of the second section branch flow channel 152. When the solenoid valve 3 is integrated in the bottle neck valve, the lower section of the valve cover 32 is hermetically connected to the first connection port 103 through a total sealing structure, and the pilot valve body 31 is fixed in the first section branch flow passage 151.

A sliding channel 311 is formed inwards in the middle of the top surface of the pilot valve body 31, and a lower connecting through hole 312 which is vertically through is formed in the middle of the bottom surface of the sliding channel 311; the movable valve core 33 is inserted into the sliding channel 311, and the bottom of the movable valve core 33 extends out of the lower connecting through hole 312. A collar 331 protruding outward is provided at the top end of the movable valve core 33, an upper connection hole 332 is provided inward at the middle of the top surface of the movable valve core 33, and a pilot hole 333 penetrating the bottom surface of the movable valve core 33 is provided at the middle of the bottom surface of the upper connection hole 332. The bottom of the first connection sleeve 34 is fixed at the top of the sliding channel 311, the top of the first connection sleeve 34 extends upward above the pilot valve body 31, the top surface of the fixed iron core 35 abuts against the inner top surface of the valve cover 32, and the lower step surface of the fixed iron core 35 rests on the top surface of the first connection sleeve 34, so that the fixed iron core 35 is fixedly limited between the valve cover 32 and the first connection sleeve 34. Electromagnetic coils 36 are disposed in the gap between the fixed iron core 35 and the valve cover 32 and in the gap between the first connecting sleeve 34 and the valve cover 32. The movable iron core 37 is movably inserted into the first connecting sleeve 34, the movable iron core 37 is sequentially composed of a first movable iron core 371 and a second movable iron core 372 from top to bottom, the outer diameter of the first movable iron core 371 is larger than that of the second movable iron core 372, the lower section of the second movable iron core 372 is a cone 373 with gradually reduced outer diameter from top to bottom, and the second movable iron core 372 is inserted into the upper connecting hole 332. An annular clamping groove 374 is formed in the side wall of the first movable iron core 371 inwards, the upper section of the sleeve 38 is sleeved on the first movable iron core 371, a clamping plate 381 capable of being clamped in the annular clamping groove 374 is fixedly arranged at the top of the sleeve 38, the top of the sleeve 38 is clamped in the annular clamping groove 374 through the clamping plate 381, the lower section of the sleeve 38 is sleeved on the movable valve core 33, an annular baffle 382 capable of blocking the collar 331 from falling out of the sleeve 38 is fixedly arranged at the bottom of the sleeve 38, and the sleeve 38 can slide up and down along the sliding channel 311. The sleeve 38 is formed by two semicircular cylinders. Be provided with first spring 39 between fixed iron core 35 bottom and activity iron core 37 top, for fixed first spring 39 and make activity iron core 37 receive elasticity upper and lower slip more steady, in this embodiment, inwards seted up first embedded groove 351 in the middle part of the fixed iron core 35 bottom surface, inwards seted up second embedded groove 375 in the middle part of activity iron core 37 top surface, first spring 39 upper end is fixed in first embedded groove 351, and first spring 39 lower extreme is fixed in second embedded groove 375.

An annular groove 335 recessed inwards is formed in the bottom surface of the movable valve element 33, and a fifth O-ring 336 is arranged in the annular groove 335 in a clamping manner. When the electromagnetic coil 36 is de-energized and under the elastic force of the first spring 39, the second movable iron core 372 is inserted into the upper connecting hole 332 and then is in sealing contact with the pilot hole 333 and drives the movable valve core 33 to move downwards, so that the bottom surface of the movable valve core 33 is in sealing contact with the step surface between the second section of branch flow channel 152 and the first horizontal gas flow channel 13, and the vertical gas flow channel 12 and the first horizontal gas flow channel 13 are blocked from communicating.

A plurality of small holes 334 penetrating through the side wall of the bottom of the upper connecting hole 332 are arranged on the side wall of the movable valve core 33 at intervals, and when the second movable iron core 372 is inserted into the upper connecting hole 332 and then is in sealing contact with the pilot hole 333, a gap formed between the upper connecting hole 332 and the outer contour of the cone 373 is communicated with each small hole 334. When the electromagnetic coil 36 is energized, the movable core 37 electromagnetically compresses the first spring 39, moves upward away from the pilot hole 333, and causes the respective small holes 334 to communicate with the pilot hole 333.

As shown in fig. 13, when the electromagnetic valve is integrated in the bottle neck valve, when the electromagnetic coil 36 is de-energized and under the elastic force of the first spring 39, the second movable iron core 372 is inserted into the upper connection hole 332 and then sealingly abuts against the pilot hole 333 and drives the movable valve core 33 to move downward to the lower limit position (the lower limit position is the position where the bottom surface of the movable valve core 33 sealingly abuts against the step surface between the second section of branch flow channel 152 and the first horizontal gas flow channel 13), a gap is left between the collar 331 and the annular baffle 382, and a gap is left between the annular baffle 382 and the bottom surface of the sliding channel 311.

As shown in fig. 13, in the present embodiment, an annular convex ring 341 protruding outward is provided at the bottom of the first connection sleeve 34, and the first connection sleeve 34 is fixed to the top of the sliding channel 311 by the annular convex ring 341. When the electromagnetic valve is integrated in the bottleneck valve, when the electromagnetic coil 36 is de-energized and under the action of the elastic force of the first spring 39, the second movable iron core 372 is inserted into the upper connecting hole 332 and then is in sealing abutment on the pilot hole 333 and drives the movable valve core 33 to move downwards to the lower limit position, an adjusting gap for the upward movement of the movable iron core 37 is left between the bottom surface of the annular convex ring 341 and the top surface of the clamping plate 381.

In this embodiment, the lower section of the movable valve core 33 below the sleeve 38 is a circular truncated cone 337 with gradually increasing outer diameter from top to bottom. The arrangement of the truncated cone 337 guides the gas flowing from the vertical gas channel 12 to flow upward into the small holes 334 from the gap between the side wall of the second segment branch channel 152 and the outer side wall of the movable valve core 33.

When gas flows from the vertical gas flow passage 12 to the first horizontal gas flow passage 13, namely the hydrogen storage cylinder is discharged outwards, the working principle of the electromagnetic valve 3 is as follows:

when the electromagnetic coil 36 is de-energized and under the elastic force of the first spring 39, the second movable iron core 372 is inserted into the upper connecting hole 332 and then is in sealing contact with the pilot hole 333 and drives the movable valve core 33 to move downwards until the bottom surface of the movable valve core 33 is in contact with the step surface between the second section of branch flow channel 152 and the first horizontal gas flow channel 13, and at this time, the first horizontal gas flow channel 13 is not communicated with the vertical gas flow channel 12. Fig. 13 is a schematic structural view of the solenoid valve 3 in an unopened state.

When the electromagnetic coil 36 is energized, the movable iron core 37 moves upward under the electromagnetic action to be away from the pilot hole 333, at this time, each small hole 334 is communicated with the pilot hole 333, the bottom surface of the movable valve element 33 still abuts against the step surface between the second-stage branch flow passage 152 and the first horizontal gas flow passage 13, and as shown in fig. 14, the gas flowing from the vertical gas flow passage 12 flows into the first horizontal gas flow passage 13 through each small hole 334 and the pilot hole 333. At this time, the pressure at the upper part of the movable valve core 33 drops rapidly, a pressure difference of low and high levels is formed around the interactive valve core 33, and the gas pressure pushes the movable valve core 33 to move upwards, so that the electromagnetic valve 3 is opened. Fig. 16 is a schematic structural diagram of the solenoid valve 3 in an open state, in which gas can flow from the vertical gas channel 12 to the first horizontal gas channel 13, so as to perform a gas discharging operation.

When gas flows from the first horizontal gas flow passage 13 to the vertical gas flow passage 12, that is, when the hydrogen storage cylinder is charged, the electromagnetic valve 3 operates according to the following principle:

the solenoid valve 3 then corresponds to a non-return valve. When the electromagnetic coil 36 is de-energized, the gas pressure in the first horizontal gas flow passage 13 overcomes the elastic force of the first spring 39 to move the movable valve core 33 upward, the movable valve core 33 is pushed to move upward under the action of the gas pressure, the first spring 39 is compressed, and the electromagnetic valve 3 is opened. The gas flows from the first horizontal gas flow passage 13 to the vertical gas flow passage 12, and the inflation operation is realized.

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 structure is simple and compact, the processing and the assembly are convenient, the weight is light, the volume is small, the leakage point is less, the sealing performance is good, the integration level is high, and the cost is greatly reduced.

Claims

1. An air inlet and outlet structure of a high-pressure bottle mouth valve, comprising: the main valve body, be provided with the connection cylinder that can stretch into in the hydrogen storage cylinder bottleneck bottom the main valve body, its characterized in that: a gas flow passage is arranged in the main valve body and is formed by sequentially connecting a vertical gas flow passage, a first horizontal gas flow passage and a second horizontal gas flow passage, the vertical gas flow passage is vertically intersected with the first horizontal gas flow passage, the first horizontal gas flow passage is intersected with the second horizontal gas flow passage, the vertical gas flow passage penetrates through the bottom surface of the connecting column body and forms a first opening on the bottom surface of the connecting column body, the flow limiting valve is arranged in the first opening in a sealing manner, and the second horizontal gas flow passage penetrates through the side surface of the main valve body and forms a second opening on the side surface of the main valve body; a first branch gas flow channel is arranged at the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel, the first branch gas flow channel penetrates through the side face of the main valve body, a first connecting port is formed in the side face of the main valve body, the electromagnetic valve hermetically extends into the vertical intersection of the vertical gas flow channel and the first horizontal gas flow channel through the first connecting port, the electromagnetic valve blocks the vertical gas flow channel from communicating with the first horizontal gas flow channel when the electromagnetic valve is in an unopened state, and the vertical gas flow channel is unblocked from the first horizontal gas flow channel when the electromagnetic valve is in an opened state; the first horizontal gas flow channel and the second horizontal gas flow channel are intersected to form a first connector, the manual stop valve hermetically extends into the intersection of the first horizontal gas flow channel and the second horizontal gas flow channel through the first connector, the manual stop valve is in an unopened state and blocks the first horizontal gas flow channel from flowing through the second horizontal gas flow channel, and when the manual stop valve is in an opened state, the first horizontal gas flow channel and the second horizontal gas flow channel are unblocked.

2. The air inlet and outlet structure of a high-pressure cylinder mouth valve according to claim 1, characterized in that: the first horizontal gas flow channel is communicated with the second branch gas flow channel, the first horizontal gas flow channel and the second branch gas flow channel are coaxial, and the second horizontal gas flow channel penetrates through the side wall of the second branch gas flow channel and forms a first branch opening on the side wall of the second branch gas flow channel; a third horizontal gas flow channel is also arranged on the side wall of the second branch gas flow channel, the third horizontal gas flow channel penetrates through the side wall of the second branch gas flow channel and forms a second branch port on the side wall of the second branch gas flow channel, and the third horizontal gas flow channel penetrates through the side surface of the main valve body and forms a third opening on the side surface of the main valve body; the manual stop valve stretches into the first horizontal gas flow channel through the second connecting port in a sealing mode, the first horizontal gas flow channel and the second branch gas flow channel are blocked to circulate when the manual stop valve is in an unopened state, the first horizontal gas flow channel and the second branch gas flow channel are unblocked when the manual stop valve is in an opened state, and gas output from the first horizontal gas flow channel enters the second branch gas flow channel and then is divided into two paths of flow through the first flow dividing port and the second flow dividing port.

3. The air inlet and outlet structure of a high-pressure cylinder mouth valve according to claim 2, characterized in that: and a pressure measuring channel is also arranged on the second horizontal gas flow channel or the third horizontal gas flow channel, the pressure measuring channel penetrates through the side face of the main valve body, a fourth opening is formed in the side face of the main valve body, and the pressure sensor is hermetically arranged in the pressure measuring channel through the fourth opening.

4. The air inlet/outlet structure of a high-pressure bottle neck valve according to claim 1 or 2, wherein: the structure of the flow limiting valve comprises: the flow-limiting valve body is provided with a first channel, a second channel, a third channel and a fourth channel in sequence from top to bottom in the middle of the top surface of the flow-limiting valve body, and the inner apertures of the first channel, the second channel, the third channel and the fourth channel are reduced in sequence to form a step hole structure; the sliding valve core is movably inserted in the second channel and the third channel, a convex ring which protrudes outwards is arranged at the top of the sliding valve core, the convex ring is movably arranged in the second channel, and the connecting sleeve is fixed in the first channel; a spring is sleeved on the sliding valve core, the bottom end of the spring abuts against a step surface formed between the second channel and the third channel, and the top end of the spring abuts against the bottom surface of the convex ring to enable the top surface of the convex ring to abut against the connecting sleeve; a first gas flow channel is inwards arranged in the middle of the top surface of the sliding valve core, a second gas flow channel is inwards arranged in the middle of the bottom surface of the sliding valve core, the first gas flow channel is communicated with the second gas flow channel through a middle throttling hole, a plurality of first through holes communicated with the first gas flow channel are arranged on the side wall of the upper section of the sliding valve core at intervals, and a plurality of second through holes communicated with the second gas flow channel are arranged on the side wall of the lower section of the sliding valve core at intervals; when the sliding valve core moves downwards until the bottom surface of the sliding valve core abuts against a step table surface formed between the third channel and the fourth channel, each second through hole on the sliding valve core is positioned in the third channel, and gas flows out of the fourth channel through the connecting sleeve, the first gas flow channel, the middle throttling hole and the second gas flow channel; when the slide valve core is only under the action of the elastic force of the spring, the top surface of the lower flange is abutted against the connecting sleeve under the action of the spring, each first through hole and each second through hole are positioned in the second channel, and gas passes through the connecting sleeve and the first gas flow channel and then is divided into two paths: one path is collected in the second gas flow channel through the middle throttling hole, the other path is collected in the second gas flow channel through the first through hole, the interlayer gap between the sliding valve core and the second channel and the second through hole, and then the gas flows out of the second gas flow channel and the fourth channel in a unified mode.

5. The structure of claim 4, wherein: the inner hole of the connecting sleeve is a prismatic hole.

6. The structure of claim 4, wherein: the flow limiting valve body is formed by integrally molding a first cylinder, a second cylinder and a third cylinder from top to bottom in sequence, the outer diameters of the first cylinder, the second cylinder and the third cylinder are reduced in sequence to form a step shaft structure, and the flow limiting valve is installed in the first opening through the third cylinder; a plurality of platforms are cut on the first column body at intervals along the circumferential direction.

7. The air inlet/outlet structure of a high-pressure bottle neck valve according to claim 1 or 2, wherein: the structure of the manual stop valve comprises: the stop valve body is arranged in the second branch gas flow passage through the first sealing structure; the second branch gas flow channel is coaxial with the first horizontal gas flow channel and penetrates through the side wall of the bottom of the second branch gas flow channel; the middle part of the top surface of the stop valve body is provided with a connecting channel which is communicated up and down, an internal thread section is arranged in the connecting channel, the valve core is inserted and arranged in the connecting channel, an external thread section which is screwed with the internal thread section is arranged on the valve core, the valve core is screwed with the internal thread section through the external thread section so as to be screwed in the connecting channel, the bottom of the valve core is provided with a second sealing structure, and the valve core is rotated to enable the bottom of the valve core to extend out of the lower part of the stop valve body and then to be sealed and abutted against the opening of the first horizontal gas flow channel so as to; rotating the valve core in the opposite direction to enable the bottom of the valve core to be far away from the first horizontal gas flow channel opening, and the first horizontal gas flow channel and the second horizontal gas flow channel to be smooth; an annular groove which is recessed inwards is formed in the connecting channel below the internal thread section, and a third sealing structure which enables the valve core and the connecting channel to be sealed is arranged in the annular groove.

8. The structure of claim 7, wherein: an accommodating groove which is recessed inwards is formed in the upper part of the connecting channel, and the threaded retaining ring is fixedly arranged in the accommodating groove; the connecting channel consists of a first connecting channel and a second connecting channel from top to bottom in sequence, the inner aperture of the first connecting channel is larger than that of the second connecting channel, and the internal thread section is arranged in the first connecting channel; the valve core is sequentially composed of a first cylinder, a second cylinder and a third cylinder from top to bottom, the outer diameter of the first cylinder is smaller than that of the second cylinder, the outer diameter of the second cylinder is larger than that of the third cylinder, and an external thread section is arranged on the second cylinder; when the valve core is positioned at the lower limit position, the step surface between the second cylinder and the third cylinder is placed on the step surface between the first connecting channel and the second connecting channel; when the valve core is positioned at the upper limit position, the step surface between the first cylinder and the second cylinder is abutted against the bottom surface of the threaded retaining ring.

9. The structure of claim 7, wherein: an inner hexagonal hole is inwards arranged in the middle of the top surface of the valve core.

10. The structure of claim 7, wherein: the first sealing structure is as follows: the valve body consists of an upper valve body and a lower valve body, the outer diameter of the upper valve body is larger than that of the lower valve body, and a first O-shaped sealing ring is arranged on a step surface between the upper valve body and the lower valve body; the second sealing structure is as follows: a connecting column is arranged at the bottom of the valve core, the outer diameter of the connecting column is smaller than that of the third cylinder, and a second O-shaped sealing ring is hooped on the connecting column; the third sealing structure is a first check ring and a third O-shaped sealing ring which are arranged in the annular groove.