High-pressure hydrogen supply overflow valve assembly

Abstract

The utility model relates to the technical field of overflow valve assemblies, in particular to a high-pressure hydrogen supply overflow valve assembly which comprises an assembly shell, a connecting structure is arranged on the outer side of the shell, an airflow channel and an overflow valve element located in the airflow channel are arranged in the shell, and a port is formed in the end, corresponding to the overflow valve element, of the shell. An airflow gap is formed between the side portion of the overflowing valve element and the inner wall of the shell, a plurality of air outlets are formed in the side portion of the overflowing valve element, the periphery of the overflowing valve element is sleeved with an elastic piece, an abutting piece is arranged on the periphery of the overflowing valve element, and the abutting piece is used for moving along with the overflowing valve element to abut against the elastic piece when the air supply flow in the airflow channel is increased; an airflow balance hole is further formed in the end, facing the port, of the overflowing valve element and used for balancing the air pressure between the overflowing valve element and the interior of the valve body; the technical problem that in the prior art, when the air supply flow is increased suddenly, the elastic reset piece blocks a port, and the elastic reset piece can return to the original position after waiting for a long time is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to over -current valve subassembly technical field, concretely relates to a kind of high-pressure hydrogen gas supply over -current valve subassembly. BACKGROUND

[0002] Over -current valve is also called flow safety valve, it is a kind of device when fluid flow exceeds predetermined value automatically cut off or limit flow. It mainly plays the role of protecting system safety, prevent such as pipe rupture, equipment damage or other safety accidents caused by excessive flow. The bottle mouth valve of high-pressure hydrogen gas bottle container etc. is usually installed with over -current valve, in the use scene of high-pressure gas bottle, if because of some reasons (such as pipe rupture, valve failure etc.), over -current valve will play a role to prevent a large amount of gas from leaking in a short time, to guarantee the safety of use.

[0003] For example, the patent application file with the application publication number CN114542944A discloses a bottle valve for gas cylinder and gas cylinder, wherein the bottle valve for gas cylinder comprises: a bottle valve body and an over -current valve. The bottle valve body has a gas supply channel and a mounting space; the over -current valve is installed in the mounting space, and the over -current valve comprises: an over -current valve flap and an elastic reset member, the elastic reset member is arranged on the over -current valve flap, and the over -current valve flap is adapted to open or block the gas supply channel. The overall volume of the bottle valve is smaller, and it is more convenient to arrange, which can effectively save the arrangement space, to facilitate the overall layout of the hydrogen storage system, and the safety of the bottle valve is better.

[0004] The application scenario of the above-mentioned over -current valve is mainly when gas supply pipeline breaks, the elastic reset member blocks the port used to communicate the downstream section under the pressure of gas, so as to block the gas supply channel, so that gas cannot flow into the downstream section again, and the elastic reset member will reset under the reset force of spring after the pipeline is repaired. However, for another scenario, that is, when the elastic reset member blocks the port due to sudden increase of gas supply flow, only relying on the above-mentioned device, the elastic reset member cannot be reset in a short time, and needs to wait for a long time, and the elastic reset member can return to original position when gas supply flow decreases. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of high-pressure hydrogen gas supply over -current valve subassembly to solve the technical problem that in prior art, when the elastic reset member blocks the port due to sudden increase of gas supply flow, it needs to wait for a long time that elastic reset member can return to original position.

[0006] To solve the above problem, the high-pressure hydrogen gas supply over -current valve subassembly provided by the utility model adopts the following technical scheme:

[0007] The utility model provides a high pressure hydrogen gas supply overflow valve assembly, including the casing, the outside of casing has the connecting structure for connecting valve body, the inside of casing has the airflow channel and is located the overflow valve core in the airflow channel, the one end of casing with overflow valve core corresponds has the port of intercommunication valve body, the side portion of overflow valve core has the airflow gap between the inner wall of casing and the side portion of overflow valve core and has a plurality of gas outlets, a plurality of gas outlets are connected with the port through the airflow gap, the outer periphery of overflow valve core is equipped with the elastic piece, the outer periphery of overflow valve core has the abutment piece of abutment elastic piece, and the abutment piece is used to move with overflow valve core when the gas flow in airflow channel increases and then abut elastic piece to make elastic piece block the port.

[0008] The one end of overflow valve core towards the port still has the airflow balance hole, and the airflow balance hole is used to balance the air pressure between overflow valve core and the inside of valve body, so as to shorten the time of elastic piece driving overflow valve core reset.

[0009] The utility model provides a high pressure hydrogen gas supply overflow valve assembly has the beneficial effect of: when the gas flow in airflow channel increases sharply, the gas of gas outlet is reserved in the airflow gap and cannot enter the port by pushing overflow valve core to block the port, by setting up the airflow balance hole, the port and the inside of overflow valve core can keep a airflow intercommunication, when the air pressure between overflow valve core and the inside of valve body is balanced, overflow valve core restores the original position under the action of elastic piece, and the whole assembly reopens, compared with prior art, when the gas flow increases sharply in a moment, the whole assembly can realize self -adaptation balance by the airflow balance hole, and the elastic piece reset can be realized quickly, solve the technical problem that the elastic reset piece blocks the port when the gas flow increases suddenly in prior art, and the elastic reset piece can restore the original position after a long time.

[0010] Further, the airflow balance hole is located in the middle of the overflow valve core, and the radial dimension of the airflow balance hole is smaller than the radial dimension of each gas outlet.

[0011] Further, the connecting structure is an external thread section, which is used for being screwed in the inside of the valve body.

[0012] Further, the elastic piece is a spring, and the abutment piece is an annular plate arranged at the end of the overflow valve core away from the airflow balance hole. The end of the spring movably contacts the annular plate.

[0013] Further, the outer periphery of the annular plate abuts against the inner wall of the casing, so as to realize the guiding effect during reciprocating movement by means of the inner wall.

[0014] Further, the inside of the casing further has an annular step in contact with the annular plate, and the overflow valve core is seated on the annular step through the annular plate.

[0015] Further, the gas flow channel is provided with a filter structure for filtering impurities in the entering gas, so that the gas entering the valve body is cleaner.

[0016] Further, the filter structure is a filter screen located on the side of the annular step away from the overflow valve core, so as to avoid the filter screen moving with the overflow valve core. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present application are illustrated by way of example and not limitation. Like reference numerals refer to like elements throughout.

[0018] Figure 1 A sectional view of the high-pressure hydrogen gas supply overflow valve assembly provided by the present application;

[0019] Figure 2 A sectional view of the high-pressure hydrogen gas supply overflow valve assembly provided by the present application;

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1, housing; 2, valve body; 3, gas flow channel; 4, overflow valve core; 5, port; 6, gas outlet; 7, gas flow gap; 8, gas flow balance hole; 9, external thread section; 10, spring; 11, annular plate; 12, annular step; 13, filter screen. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Those skilled in the art should know that the embodiments described below are only part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] It should be noted that the main concept of the present application is that when the gas flow in the gas flow passage 3 increases sharply, the gas flow pushes the flow valve core 4 to block the port 5, and the gas accumulated in the gas flow gap 7 cannot enter the port 5. By providing the gas flow balance hole 8, the port 5 and the flow valve core 4 can always communicate with each other. When the gas pressure between the flow valve core 4 and the inside of the valve body 2 is balanced, the flow valve core 4 returns to the original position under the action of the elastic member, and the whole assembly is reopened. Compared with the prior art, when the gas flow increases sharply at a certain moment, the whole assembly can rely on the gas flow balance hole 8 to realize self-adaptive balance, and the elastic reset member can quickly reset to solve the technical problem that the elastic reset member blocks the port 5 when the gas flow suddenly increases in the prior art. It takes a long time for the elastic reset member to return to the original position.

[0024] After introducing the basic principle of the present application, the various non-limiting embodiments of the present application will be specifically introduced below. Any element quantity in the drawings is used for example and not for limitation, and any naming is only used for distinction and does not have any limiting meaning.

[0025] The principles and spirits of the present application will be explained in detail below with reference to several representative embodiments of the present application.

[0026] The embodiments of the high-pressure hydrogen gas supply overflow valve assembly provided by the present application are as follows:

[0027] As shown in Figure 1 and Figure 2 , a high-pressure hydrogen gas supply overflow valve assembly comprises a shell 1, the shell 1 has a connecting structure outside for connecting a valve body 2, the inside of the shell 1 has a gas flow passage 3 and a flow valve core 4 located in the gas flow passage 3, one end of the shell 1 corresponding to the flow valve core 4 has a port 5 communicating with the valve body 2, the side of the flow valve core 4 has a gas flow gap 7 with the inner wall of the shell 1, and the side of the flow valve core 4 has a plurality of gas outlets 6, the plurality of gas outlets 6 communicate with the port 5 through the gas flow gap 7, the flow valve core 4 is sleeved with an elastic member, the flow valve core 4 has a contact member contacting the elastic member, and the contact member is used to move with the flow valve core 4 to contact the elastic member when the gas flow in the gas flow passage 3 increases, so that the elastic member blocks the port 5.

[0028] The end of the flow valve core 4 facing the port 5 also has a gas flow balance hole 8, and the gas flow balance hole 8 is used to balance the gas pressure between the flow valve core 4 and the inside of the valve body 2, thereby shortening the time for the elastic member to drive the flow valve core 4 to reset.

[0029] Reference Figure 1The air flow balance hole 8 is located in the middle of the overflow valve core 4, and the radial size of the air flow balance hole 8 is smaller than the radial size of each air outlet 6. In this way, when the gas flow is sharply increased at a moment, the overflow valve core 4 can first block the port 5 under the air flow thrust to protect. In other embodiments, the radial size of the air flow balance hole 8 can also be equal to the radial size of each air outlet 6

[0030] With reference to Figure 1 And Figure 2 The connecting structure is an outer threaded section 9 used for being screwed in the valve body 2. The threaded structure has the advantages of simple structure and stable connection. In other embodiments, the connecting structure can also be a bolt, and the shell 1 is fixed on the valve body 2 through the bolt.

[0031] In the embodiment, the elastic member is a spring 10, and the abutting member is an annular plate 11 arranged at the end of the overflow valve core 4 away from the air flow balance hole 8, and the end of the spring 10 movably contacts the annular plate 11. Specifically, the outer periphery of the annular plate 11 abuts against the inner wall of the shell 1 to realize the guiding effect during reciprocating movement by means of the inner wall, so as to avoid shaking of the annular plate 11 during reciprocating movement. In other embodiments, the outer periphery of the annular plate 11 can also not abut against the inner wall of the shell 1.

[0032] In order to make the overflow valve core 4 better keep in position in the air flow channel 3, the inside of the shell 1 further has an annular step 12 in contact with the annular plate 11, and the overflow valve core 4 is seated on the annular step 12 through the annular plate 11.

[0033] Finally, the air flow channel 3 further has a filtering structure arranged therein, which is used for filtering impurities in the entering gas, so as to make the gas entering the valve body 2 more clean. Specifically, the filtering structure is a filter screen 13 arranged at the side of the annular step 12 away from the overflow valve core 4, so as to avoid the filter screen 13 moving along with the overflow valve core 4.

[0034] The working principle of the high-pressure hydrogen gas supply overflow valve assembly is as follows: the whole assembly is screwed in the valve body 2 through threaded connection, when the gas flow in the air flow channel 3 is sharply increased, the air flow pushes the overflow valve core 4 to block the port 5, the gas flowing out of the air outlet 6 is accumulated in the air flow gap 7 and cannot enter the port 5, the air flow balance hole 8 is arranged to make the port 5 and the overflow valve core 4 always keep an air flow intercommunication, after the air pressure between the overflow valve core 4 and the inside of the valve body 2 is balanced, the overflow valve core 4 returns to the original position under the action of the elastic member, and the whole assembly is reopened, compared with the prior art, when the gas flow is sharply increased at a moment, the whole assembly can realize self-adaptive balance through the air flow balance hole 8, and the elastic member can be quickly reset.

[0035] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, which are only for the purpose of facilitating the description of the scheme of the present application and simplifying the description, and are not explicitly or implicitly indicated that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the present application.

[0036] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise explicitly and specifically limited.

Claims

1. A high pressure hydrogen gas supply relief valve assembly, comprising: The valve body comprises a shell, a connecting structure outside the shell for connecting the valve body, an airflow channel inside the shell, a flow valve core in the airflow channel, a port in the shell corresponding to the flow valve core for communicating with the valve body, an airflow gap between the side of the flow valve core and the inner wall of the shell, and a plurality of air outlets on the side of the flow valve core, the plurality of air outlets being communicated with the port through the airflow gap, an elastic member sleeved on the outer periphery of the flow valve core, and a contact member on the outer periphery of the flow valve core for contacting the elastic member when the flow valve core moves in the airflow channel to block the port. The end of the flow valve core towards the port is further provided with an airflow balance hole for balancing the air pressure between the flow valve core and the inside of the valve body, thereby shortening the time for the elastic member to drive the flow valve core to reset.

2. The high pressure hydrogen gas service relief valve assembly of claim 1, wherein: The airflow balance hole is located in the middle of the flow valve core, and the radial dimension of the airflow balance hole is smaller than the radial dimension of each air outlet.

3. The high pressure hydrogen gas service relief valve assembly of claim 1 or 2, wherein: The connecting structure is an external thread section for being screwed into the inside of the valve body.

4. The high pressure hydrogen gas service relief valve assembly of claim 3, wherein: The elastic member is a spring, and the contact member is an annular plate arranged at the end of the flow valve core away from the airflow balance hole, and the end of the spring movably contacts the annular plate.

5. The high pressure hydrogen gas service relief valve assembly of claim 4, wherein: The outer periphery of the annular plate contacts the inner wall of the shell to realize the guiding effect during reciprocating movement.

6. The high pressure hydrogen gas service relief valve assembly of claim 4 or 5, wherein: The inside of the shell is further provided with an annular step in contact with the annular plate, and the flow valve core is seated on the annular step through the annular plate.

7. The high pressure hydrogen gas service relief valve assembly of claim 6, wherein: The airflow channel is further provided with a filter structure for filtering impurities in the entering gas to make the gas entering the valve body cleaner.

8. The high pressure hydrogen gas service relief valve assembly of claim 7, wherein: The filter structure is a filter screen located on the side of the annular step away from the flow valve core to avoid the filter screen moving with the flow valve core.

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