Integrated bottleneck valve

Abstract

The utility model discloses an integrated bottleneck valve, and belongs to the technology of core parts of safety accessories of hydrogen storage cylinders and gas cylinders. The bottleneck valve comprises a valve seat and a main valve body, wherein the valve seat and the main valve body are integrally formed or hermetically connected; the main valve body comprises a one-way valve, a one-way valve element and a one-way valve return spring are arranged at a one-way valve vent hole, and the one-way valve return spring is used for sealing the one-way valve vent hole when the one-way valve element is not affected by external force. The integrated bottleneck valve comprises a connecting mechanism, a steel ball hole used for containing a steel ball is formed in a main valve body, a ball pressing sleeve is arranged at the position of the steel ball hole, and the ball pressing sleeve can control the steel ball to move leftwards or rightwards in the steel ball hole by moving up and down. The bottleneck valve can be used as a female head, and can be matched with a male head to quickly seal and lock butt joint.

Description

Technical Field

[0001] The utility model belongs to a gas control valve, specifically relates to a small-sized solid-state hydrogen storage hydrogen bottle and hydrogen filling and use technology thereof, and in particular relates to an integrated bottle mouth valve. Background Art

[0002] In the prior art, such as the bottle mouth valve on a traditional small gas cylinder recorded in CN220707059, the gas outlet at the top of the bottle mouth valve is usually a slender male head protruding from the bottle mouth. The inlet and outlet male heads on the top of the bottle mouth protrude from the top of the bottle mouth. During the transportation or filling of the gas cylinder, it is easy for the inlet and outlet male heads to be scratched and damaged, resulting in an inability to achieve effective sealing with the seal in the female head, leading to accidents such as gas leakage.

[0003] According to the drop test requirements of Section 5.2 of the national standard GB / T 34544-2017, "Safety Test Methods for Low-Pressure Hydrogen Storage Devices for Small Fuel Cell Vehicles," low-pressure hydrogen storage devices must be equipped with components such as a shutoff valve and an overpressure relief device, but should not have any other protective devices. Furthermore, Section 5.2.2.2b) stipulates that the center of gravity must be at least 1.8 meters high, and the end with the shutoff valve and overpressure relief device must fall first. Therefore, according to the standard, during the drop test, the head-protruding male connector of a traditional bottle-mouth valve must land first, and this connector should not have any other protective devices. This slender male connector, which lands head-first, is susceptible to breaking or bending due to stress concentration, leading to failure. Therefore, the traditional bottle-mouth valve structure with a protruding male connector at the top does not meet the technical requirements of GB / T 34544-2017.

[0004] On the other hand, the quick-connect connection structure between the pressure reducing valve and the bottle-mouth valve directly impacts the user experience of the finished product. A mechanical mechanism is required to open the check valve within the bottle-mouth valve, allowing the gas inside the bottle to pass through the valve head and connect to the pressure reducing valve inlet. Traditional bottle-mouth valves with a protruding male connector are slender in structure, so the mechanical opening mechanism for the check valve, mounted within the inner bore, can only be achieved using a thin, needle-shaped ejector pin. Considering that the maximum pressure test within the bottle can exceed 10 MPa, assuming the effective inner bore diameter of the male connector is 2.5 mm, the wall thickness should be at least 0.5 mm to ensure strength. Therefore, the effective sealing diameter of the male and female connectors of the pressure reducing valve and the bottle-mouth valve should be at least 3.5 mm. The corresponding pressure thrust is: F = P * S = 10 MPa * 3.5 * 3.5 * 3.14 / 4 = 96.16 N. A thin, long ejector pin, repeatedly subjected to a 96 N thrust, is prone to bending and damage.

[0005] Traditional bottle-mouth valves are combined with pressure-reducing valves. The pressure-reducing valve is a vertical cylinder that can only be firmly grasped with one hand, using the friction generated by this grip to insert the valve downward. When the bottle is under high pressure, according to the calculations described in the previous paragraph, approximately 96N of downward force is required. This force comes from the friction generated by the palm of your hand firmly grasping the pressure-reducing valve cylinder. Because the gripping force required is very high, it is difficult for male workers with weak hands, as well as most female workers, to operate the valve, and they may even be unable to complete the insertion.

[0006] Therefore, there is an urgent need for a new bottle mouth valve with an innovative structure that can avoid the above defects, better meet the national standards, and improve the safety and reliability of small hydrogen storage cylinders. Utility Model Content

[0007] The utility model aims to provide an integrated bottle mouth valve to solve the problems of the bottle mouth valve body being easily damaged and the connection being difficult during use in the above-mentioned prior art.

[0008] In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions.

[0009] An integrated bottle mouth valve comprises a valve seat and a main valve body, wherein the valve seat and the main valve body are integrally formed or sealed;

[0010] The main valve body includes a one-way valve, a one-way valve core and a one-way valve return spring are arranged at the one-way valve vent hole, and the one-way valve return spring is used for the one-way valve core to seal the one-way valve vent hole without being affected by external force.

[0011] Furthermore, the integrated bottle mouth valve includes a connecting mechanism, which includes a steel ball hole for accommodating a steel ball on the main valve body, and a ball pressing sleeve is provided at the steel ball hole. The ball pressing sleeve can control the steel ball to move left or right in the steel ball hole by moving up and down.

[0012] The bead pressing sleeve is arranged outside the main valve body and includes a bead pressing sleeve reset spring connected thereto.

[0013] The contact surface between the ball pressing sleeve and the steel ball is configured as an inclined surface or an arc surface.

[0014] Furthermore, the bottle mouth valve includes a porous medium filter provided at the mouth of the hydrogen storage bottle.

[0015] The steel ball hole on the main valve body is set through, the steel ball can move laterally in the steel ball hole, and the opening diameters on both sides of the steel ball hole are smaller than the diameter of the steel ball.

[0016] The bottle mouth valve also includes a bursting discharge channel, and the bursting discharge channel is equipped with a bursting disc.

[0017] Furthermore, the structure of the bottle mouth valve includes a sealing ring for sealing between components.

[0018] Compared with the prior art, the significant beneficial effects of the present invention mainly include:

[0019] (1) The present invention aims to solve the problem of the prior art connecting the pressure reducing valve and the bottle mouth valve by adopting a quick locking mechanism combining a bead sleeve and a steel ball, which is more labor-saving and convenient in the connection operation.

[0020] (2) The bottle mouth valve provided by the present invention adopts the method of setting the female head at the inlet and outlet of the hydrogen storage bottle, which can avoid the damage caused by setting the male head on the bottle mouth of the hydrogen storage bottle and the failure to meet the drop test requirements in the "Safety Test Method for Low-Pressure Hydrogen Storage Devices for Small Fuel Cell Vehicles". BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the external structure of the bottle mouth valve;

[0022] Figure 2 This is a schematic diagram of the internal structure of the bottle mouth valve;

[0023] Figure 3 It is a schematic diagram of the valve body assembly structure of the utility model;

[0024] Figure 4 It is a cross-sectional view of the bottle mouth valve described in the utility model;

[0025] Figure 5 It is a schematic diagram of the installation structure of the utility model on a hydrogen storage bottle.

[0026] In the figure: 1. Male connector, 100. Male valve body, 101. Locking groove; 2. Female connector, 200. Valve seat, 201. Main valve body, 202. Steel ball, 203. Pressed ball sleeve, 204. Pressed ball sleeve return spring, 205. Sealing ring, 206. Burst relief channel, 207. Burst disc; 301. One-way valve vent, 302. One-way valve spool, 303. One-way valve return spring, 304. One-way valve sealing ring; 4. Porous medium filter. DETAILED DESCRIPTION

[0027] In order to explain the technical solution disclosed by the present utility model in detail, a further introduction is given below in conjunction with the accompanying drawings.

[0028] In this embodiment, the specific structure is introduced in combination with the use of the integrated bottle mouth valve. Figure 1 and Figure 2As shown, the bottle mouth valve mainly includes two aspects of the structure. One is that it is installed on the hydrogen storage bottle to seal the gas, that is, the main valve body 201 is set as a one-way valve. The second is that it is provided with a connecting mechanism. When used as a bottle mouth valve, it can be quickly connected with the male head 1. Based on this, we will introduce the combined structure of the bottle mouth valve and the male head 1, and the integrated bottle mouth valve described in the utility model is called the female head 2 to facilitate the understanding of those skilled in the art.

[0029] See also Figure 1-5 As shown, the male connector 1 is connected to the pressure reducing valve and can be installed on the pressure reducing valve. The interior of the male connector 1 includes a sealed gas extraction probe. By inserting it into the female connector 2, the one-way valve core 302 can be opened to achieve gas communication with the hydrogen storage bottle. The male valve body 100 of the male connector 1 includes a cylindrical design, and for better operation, a hand-held part can be set on the cylindrical body. It also includes a design of nesting the inner and outer cylindrical bodies. The inner cylindrical body can be the gas extraction probe, and the two are fixed by bolts. See Figure 1 As for the male valve body 100, its size and specifications are adapted to the female head, and the specific Figure 3 and Figure 4 In the structure shown, a locking groove 101 is provided at the lower end of the male valve body 100. The inner concave surface of the locking groove 101 includes an arc surface or an inclined surface, which can better promote the force movement of the steel ball 202. Accordingly, a steel ball hole is provided on the main valve body 201 of the female head 2, and a steel ball 202 is provided. It should be noted that the diameter of the steel ball 202 should be smaller than the thickness of the side wall of the main valve body 201, thereby enabling the steel ball 202 to move left and right in the opened steel ball hole. Figure 2 As shown, a portion of the steel ball 202 (less than half a sphere) can be protruded to the left or right. Then, when the male valve body 101 is inserted, the non-locking groove 101 contacts the steel ball 202. The steel ball 202 is placed on the left side of the side wall of the main valve body 201 and protrudes to the left. At this time, the ball pressing sleeve 203 is pressed down. The ball pressing sleeve 203 avoids the resistance to the steel ball 202, including reserving a certain accommodating cavity. Figure 4The structure shown provides a mating mechanism with the main valve body 201. A recessed portion is provided inwardly at the upper end of the main valve body 201 to form the aforementioned accommodating cavity. For better control, the contact area between the bead pressing sleeve 203 and the steel ball 202 can be configured as an arc or an inclined surface. A bead pressing sleeve return spring 204 is provided at the bottom of the bead pressing sleeve 203 to enable the bead pressing sleeve 203 to return to its original position without being affected by external forces. That is, after the male connector 1 and the female connector 2 are connected, the bead pressing sleeve 203 presses against the steel ball 202, placing it in the locking groove 101 on the male valve body 100. As long as the bead pressing sleeve 203 is not removed, the steel ball 202 cannot move to the left. Considering that rigid materials cannot deform, the male connector 1 cannot be separated from the female connector 2, forming the valve body assembly structure provided by the utility model. In addition, the connection between the male connector 1 and the female connector 2 also includes sealing through a sealing ring 205.

[0030] For the application of the above valve combination structure on the bottle mouth valve, it can be combined with Figure 5 The installation method described. The valve seat 200 in the female head 2 is sealed and connected to the bottle mouth, including a sealing ring provided at the connection, and also provided as a threaded structure. Then a porous medium filter 4 is provided at the bottom of the valve seat 200 to achieve filtering during the inflation process of the hydrogen storage bottle. The porous medium filter 4 is preferably a 0.5 mm cylindrical porous medium filter. A one-way valve is provided based on the valve seat 200, that is, the main valve body 201 adopts a one-way valve structure, which is located at the bottle mouth, and is sealed with the valve seat 200, and further fitted with the bottle mouth of the hydrogen storage bottle for sealing connection. This is a preferred solution that can be made by those skilled in the art. The one-way valve vent hole 301 is blocked by the one-way valve core 302, and a one-way valve return spring 303 is provided to provide support for the one-way valve core 302. The one-way valve core 302 has a conical head structure. When in a sealed state, the conical head fits the inner wall of the one-way valve gas channel to achieve a seal. In order to improve the sealing effect, a one-way valve sealing ring 304 is provided in the groove at the end of the conical head of the one-way valve core 302 to better fit the side wall of the one-way valve gas vent hole 301. When the one-way valve core 302 is pushed down by the gas extraction probe in the male connector 1, the conical head is separated from the inner wall of the gas channel, the gas channel is opened, and the hydrogen storage bottle is inflated. The gas channel is provided with a bursting disc 207. When the inflation pressure is too high, the bursting disc 207 can burst, thereby opening the bursting relief channel 206 for pressure relief.

[0031] Further explanation, the valve body assembly structure described in the utility model includes a male head and a female head. The male head can be combined with a pressure reducing valve, and the female head is arranged on the hydrogen storage bottle. When the bottle mouth valve is combined, the finger presses the bead sleeve downward, and the locking mechanism is opened. The palm presses the pressure reducing valve downward. When the mechanical limit position is reached, the bead sleeve is released, and the return spring pushes the bead sleeve upward. The inclined surface of the bead sleeve pushes the steel ball into the groove on the male head of the pressure reducing valve, so that the male head and the female head are locked by the steel ball being stuck in the locking groove. During the insertion operation, the direction of pressing the bead sleeve to open and the direction of inserting the pressure reducing valve downward are in the same direction, so the operation is more smooth.

[0032] In addition, when the male head of the utility model is inserted into the female head of the bottle mouth valve, the axis of the straight barrel of the pressure reducing valve is perpendicular to the male head provided on the pressure reducing valve. Therefore, when the pressure reducing valve is held by the palm of the hand, the corresponding male head is just aligned vertically with the female head of the bottle mouth valve along the direction of the arm. Therefore, the force of the palm of the hand can be used to press down, and the weight of the body can be naturally used to make the pressure insertion easier. Even users with less strength can easily complete the insertion operation of the pressure reducing valve and the bottle mouth valve.

[0033] In combination with the above content and other embodiments, the present invention can be improved and optimized as follows, and has the following technical effects.

[0034] (1) Compared with the bottle mouth valve or pressure reducing valve of the prior art as described in the background technology section, the bottle mouth valve inlet and outlet provided by the utility model are changed to female heads, and a bead sleeve with a male-female locking mechanism is provided on the outside of the female head. There is no slender protruding male head on the bottle mouth head, thereby avoiding damage and scratches that may be caused during the transportation or filling of the gas cylinder.

[0035] (2) The bottle mouth of the present invention is a female head structure with a strong and sturdy end surface, and the bead sleeve has a return spring. When the drop test requires that the bottle mouth valve end land first, the bead sleeve, the main valve body, and the bottle mouth valve seat may be the first components to bear the impact. All three are relatively strong and can withstand and absorb the impact force, protecting the internal components from damage.

[0036] (3) The utility model is provided with a blasting discharge channel for pressure relief through the blasting piece. The theoretical blasting tearing area is the stress concentration area, that is, the edges and corners around the film. When blasting, the film is instantly and completely torn along the edges and corners, ensuring the maximum instantaneous blasting discharge area, and thus ensuring the maximum discharge volume. The utility model has been repeatedly tested to verify and reproduce the theoretically predicted blasting tearing situation, so the actual product can fully achieve a large discharge volume.

Claims

1. An integrated bottle mouth valve, characterized in that: The valve seat (200) and the main valve body (201) are integrally formed or sealed together. The main valve body (201) includes a one-way valve, a one-way valve core (302) and a one-way valve return spring (303) are arranged at the one-way valve vent (301), and the one-way valve return spring (303) is used for the one-way valve core (302) to seal the one-way valve vent (301) without being affected by external force.

2. The integrated bottle mouth valve according to claim 1, characterized in that: The integrated bottle mouth valve includes a connecting mechanism, wherein the connecting mechanism includes a steel ball hole for accommodating a steel ball (202) on a main valve body (201), a ball pressing sleeve (203) is provided at the steel ball hole, and the ball pressing sleeve (203) can control the steel ball (202) to move left or right in the steel ball hole by moving up and down.

3. The integrated bottle mouth valve according to claim 2, characterized in that: The bead pressing sleeve (203) is sleeved on the outside of the main valve body (201) and includes a bead pressing sleeve reset spring (204) connected thereto.

4. The integrated bottle mouth valve according to claim 2 or 3, characterized in that: The contact surface between the bead pressing sleeve (203) and the steel ball (202) is configured as an inclined surface or an arc surface.

5. The integrated bottle mouth valve according to claim 1, characterized in that: The bottle mouth valve comprises a porous medium filter (4) arranged at the mouth of the hydrogen storage bottle.

6. The integrated bottle mouth valve according to claim 2, characterized in that: The steel ball hole on the main valve body (201) is set to penetrate, the steel ball (202) can move laterally in the steel ball hole, and the diameter of the openings on both sides of the steel ball hole is smaller than the diameter of the steel ball (202).

7. The integrated bottle mouth valve according to claim 1, characterized in that: The bottle mouth valve further comprises a bursting discharge channel (206), and the bursting discharge channel (206) is equipped with a bursting disc (207).

8. The integrated bottle mouth valve according to claim 1, characterized in that: The structure of the bottle mouth valve includes a sealing ring for sealing between components.

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