Gas cylinder valve structure

Abstract

The utility model provides a gas cylinder valve structure. The gas cylinder valve structure comprises a valve body, a valve assembly and a limiting piece. The valve body is provided with a medium flow channel and a mounting cavity communicated with the medium flow channel; the valve assembly is provided with a sealing valve located in the mounting cavity and a manual rotating rod connected with the sealing valve, and the manual rotating rod can rotate and drive the sealing valve to connect or disconnect the medium flow channel; the manual rotating rod is sleeved with the limiting piece, the limiting piece is fixed in the mounting cavity, a limiting part is arranged on the limiting piece, and the rotating stroke of the manual rotating rod is limited between the limiting part and the valve body. According to the gas cylinder valve structure, due to the limiting piece arranged in the mounting cavity and the rotation stroke between the limiting part arranged on the limiting piece and the valve body, normal opening of the sealing valve can be guaranteed, and meanwhile the safety problem caused by high-pressure hydrogen ejection due to the fact that the manual rotating rod is disengaged is effectively prevented; therefore, the use safety and reliability of the gas cylinder valve structure can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle valves, in particular to a gas bottle valve structure. Background Art

[0002] Hydrogen energy has become a new green energy with the greatest development potential due to its advantages such as high efficiency and environmental protection. However, the subsequent hydrogen and liquid hydrogen storage, transportation, vehicle operation technology, and unguaranteed safety performance have seriously hindered its large-scale development. Currently, the most common hydrogen storage method used in the hydrogen energy industry is to use gas cylinders to store hydrogen. Providing hydrogen with stable pressure and flow to the reactor through valves and pipeline systems is one of the problems facing the hydrogen energy industry at this stage.

[0003] At present, hydrogen cylinder valves are in the development and research stage in vehicle-mounted hydrogen storage systems. The manual valve structure in the existing hydrogen cylinder valve has low safety in use. When it is used, it is easy to operate the manual lever by mistake to the fully open state when operating the manual lever under high pressure. At this time, because the threads on the manual lever are all unscrewed, or after being partially unscrewed, the remaining mating thread length cannot meet the strength requirements of the manual lever and the valve body, resulting in the ejection of high-pressure hydrogen in the medium flow channel, causing personal safety issues. Utility Model Content

[0004] In view of this, the utility model aims to provide a gas cylinder valve structure to improve the safety performance of its use.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A gas cylinder valve structure comprises a valve body, a valve assembly and a stopper;

[0007] The valve body has a medium flow channel and a mounting cavity communicated with the medium flow channel;

[0008] The valve assembly comprises a sealing valve located in the installation cavity, and a manual rotating rod connected to the sealing valve, wherein the manual rotating rod can rotate and drive the sealing valve to open or disconnect the medium flow channel;

[0009] The limiting member is sleeved on the manual rotating rod and fixed in the mounting cavity. A limiting portion is provided on the limiting member, and a rotation stroke of the manual rotating rod is defined between the limiting portion and the valve body.

[0010] Furthermore, the manual rotating rod is threadedly connected to the limiting member, and / or the manual rotating rod is threadedly connected to the valve body.

[0011] Furthermore, a sealing member is provided between the manual rotating rod and the valve body for sealing a gap therebetween.

[0012] Furthermore, a retaining ring is provided on the manual rotating rod, and the retaining ring is located on a side of the sealing member away from the sealing valve.

[0013] Furthermore, the sealing valve has a conical sealing surface for sealing the medium flow channel.

[0014] Furthermore, the valve body is made of aluminum alloy, and the sealing valve is made of stainless steel.

[0015] Furthermore, a connecting portion is provided in the installation cavity, and the limiting member is detachably connected to the connecting portion.

[0016] Furthermore, the connecting portion includes a threaded hole formed in the installation cavity, and the limiting member is threadedly connected to the threaded hole.

[0017] Furthermore, an operating portion is provided on the limiting member, and the limiting member can be installed in the installation cavity by operating the operating portion.

[0018] Furthermore, the limiting portion includes a limiting end plate provided on the limiting member, and the limiting end plate is located at an end away from the valve body. Compared with the prior art, the utility model has the following advantages:

[0019] The gas cylinder valve structure of the utility model can ensure the normal opening of the sealing valve through the limiter arranged in the installation cavity and the rotation stroke arranged between the upper limit part of the limiter and the valve body, and can also effectively prevent the occurrence of safety problems caused by the manual rotating rod coming out and causing the high-pressure hydrogen to spray out. Therefore, the safety and reliability of the use of the gas cylinder valve structure can be improved, and it has a good use effect.

[0020] In addition, the manual turning rod is provided to be screwed to the limiter, or the manual turning rod is provided to be screwed to the valve body, so that the manual turning rod can be rotated and the sealing valve can be driven to open or disconnect the medium channel. At the same time, the manual turning rod can also be provided to be screwed to the limiter and the valve body, so that the manual turning rod can be rotated. The provision of the sealing member is conducive to sealing the gap between the manual turning rod and the valve body. The retaining ring provided on the manual turning rod can prevent the sealing member from being squeezed into the gap between the manual turning rod and the valve body during the rotation of the manual turning rod.

[0021] Secondly, the conical sealing surface on the sealing valve is used to block the medium flow channel, which can better seal the medium flow channel and ensure the reliability of the use of the gas cylinder valve. The valve body is made of aluminum alloy, and the sealing valve is made of stainless steel. The difference in hardness of different materials can be used to ensure the reliability of the seal. The connection part is set in the installation cavity, and the limiter and the connection part are detachably connected, which is conducive to the installation of the limiter and the manual turning rod. The connection part adopts a threaded hole, so that the limiter and the threaded hole are screwed together, which has the characteristics of simple structure and easy design and implementation.

[0022] In addition, the operating part arranged on the limiting member can facilitate the installation and fixation of the limiting member in the installation cavity. The limiting part adopts the structural form of the limiting end plate, which not only has a simple structure and is easy to process and manufacture, but also can play a good limiting role on the manual rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is a structural schematic diagram of a gas cylinder valve structure for a bottle valve according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the valve body according to an embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of the valve core assembly according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the position limiting member according to an embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 1. valve body; 11. medium flow channel; 12. installation cavity; 121. large diameter hole section; 122. small diameter hole section; 1211. first internal thread;

[0030] 2. Valve assembly; 21. Manual rotating rod; 22. Sealing valve; 23. Sealing member; 24. Retaining ring; 211. First external thread; 212. Extended end; 220. Conical sealing surface;

[0031] 3. Limiting member; 31. Second external thread; 32. Second internal thread; 33. Limiting end plate; 34. Operating part. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0033] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] The present embodiment relates to a gas cylinder valve structure. In the present application, the valve takes a hydrogen cylinder valve as an example to improve the safety performance of its use.

[0037] In terms of overall composition, Figure 1 As shown, the hydrogen bottle valve structure of this embodiment mainly includes a valve body 1, a valve assembly 2 and a limit member 3.

[0038] The valve body 1 has a medium flow channel 11 and a mounting cavity 12 connected to the medium flow channel 11. The valve assembly 2 has a sealing valve 22 located in the mounting cavity 12 and a manual rotating rod 21 connected to the sealing valve 22. The manual rotating rod 21 can rotate to make the sealing valve 22 connect or disconnect the medium flow channel 11. The limiting member 3 is sleeved on the manual rotating rod 21 and fixed in the mounting cavity 12. The limiting member 3 is provided with a limiting portion, and the rotation stroke of the manual rotating rod 21 is limited between the limiting portion and the valve body 1.

[0039] At this time, by rotating the manual turning rod 21, the sealing valve 22 can conduct or disconnect the flow of the medium, and by setting the limit piece 3 and limiting the rotation stroke between the limit part on the limit piece 3 and the valve body 1, when the sealing valve 22 conducts the medium flow channel 11, it can effectively prevent the high-pressure hydrogen in the medium flow channel 11 from being sprayed out due to the detachment of the manual turning rod 21, thereby improving the safety and reliability of the use of the hydrogen bottle valve structure.

[0040] It should be noted that the hydrogen bottle valve structure of this embodiment is applied to the bottle valve, which is used to manually control the conduction and disconnection of part of the medium flow channel 11 in the bottle valve. In addition, the flow direction of the high-pressure hydrogen in the medium flow channel is as follows: Figure 1 and Figure 2 The direction indicated by the arrow

[0041] In detail, combined with Figures 1 to 4 As shown, the valve body 1 of this embodiment has a medium flow channel 11 and an installation cavity 12, and the medium flow channel 11 is connected with the installation cavity 12. The medium flow channel 11 is used for the circulation of high-pressure hydrogen, and the installation cavity 12 includes a coaxially arranged large-diameter hole section 121 and a small-diameter hole section 122. The large-diameter hole section 121 is used to provide an installation space for the limiter 3, and the small-diameter hole section 122 is used to accommodate the sealing valve 22 and part of the manual rotating rod 21.

[0042] As a preferred implementation, in this embodiment, a connection portion is provided in the installation cavity 12, and the stopper 3 is detachably connected to the connection portion. The detachable connection between the stopper 3 and the connection portion facilitates the installation and removal of the stopper 3, and also facilitates the installation of the stopper 3 and the valve assembly 2 on the valve body 1.

[0043] Specifically, the connection portion includes a threaded hole formed in the mounting cavity 12, that is, Figure 2 The first internal thread 1211 shown in the figure, the above-mentioned limiter 3 is screwed and connected with the threaded hole, and the limiter 3 is screwed and connected with the first internal thread 1211. In this way, the limiter 3 and the valve body 1 can be detachably connected.

[0044] It can be understood that in addition to using the internal threaded hole, the connection portion of this embodiment can also use a snap-in groove set in the installation cavity 12. In this case, a snap-in protrusion that can radially extend and retract along the limit member 3 needs to be set on the side wall of the limit member 3. By snapping the snap-in protrusion and the snap-in groove, or releasing the snap-in protrusion and the snap-in groove, the limit member 3 and the valve body 1 can be detachably connected.

[0045] In this embodiment, in order to facilitate the installation and fixation of the stopper 3 on the valve body 1, as shown in FIG. Figure 4As shown, an operating portion 34 is provided on the limiting portion, and the limiting member 3 can be installed in the installation cavity 12 by operating the operating portion 34. Specifically, the operating portion 34 includes a plurality of operating holes formed on the end of the limiting member 3, and is inserted into the operating holes by a special tool, and the special tool is rotated, so that the limiting member 3 is screwed into or out of the threaded hole.

[0046] The valve assembly 2 of this embodiment, as Figure 1 and Figure 3 As shown, it includes a connected sealing valve 22 and a manual rotating rod 21. The sealing valve 22 is located in the installation cavity 12, and the sealing valve 22 is connected to one end of the manual rotating rod 21. The sealing valve 22 is driven to open or close the medium flow channel 11 by the rotation of the manual rotating rod 21. With respect to the end connected to the sealing valve 22, the other end of the manual rotating rod 21, that is, the extended end 212, extends from the installation cavity 12 to the outside of the valve body 1. This end can be connected to a handle or a hand wheel, etc., so as to operate the manual rotating rod 21 to rotate.

[0047] As a preferred implementation, the sealing valve 22 in this embodiment is threadedly connected to the manual rotating rod 21. In specific implementation, a stud is provided on the sealing valve 22, and a threaded hole is provided at the end of the manual rotating rod 21 corresponding to the stud. The sealing valve 22 is connected to the end of the manual rotating rod 21 by threading the stud and the threaded hole.

[0048] In addition, in this embodiment, as a preference, the sealing valve 22 has a conical sealing surface 220 for blocking the medium flow channel 11. By blocking the medium flow channel 11 with the conical sealing surface 220, the medium flow channel 11 can be better sealed to ensure the reliability of the hydrogen bottle valve.

[0049] Also as a preferred embodiment, in this embodiment, the manual rotating rod 21 is screwed to the limiting member 3. Figure 1 , Figure 3 and Figure 4 As shown, the stopper 3 of this embodiment is cylindrical in overall structure, and a second external thread 31 connected to the first internal thread 1211 in the installation cavity 12 is formed on its outer peripheral wall, and a second internal thread 32 screwed to the manual rotating rod 21 is formed inside. The manual rotating rod 21 is screwed to the stopper 3 by the first external thread 211 formed on the manual rotating rod 21 and the second internal thread 32.

[0050] It should be noted that, in addition to being threadedly connected to the limiter 3 , the manual rotating rod 21 may also be threadedly connected to the valve body 1 . Of course, it may also be threadedly connected to both the limiter 3 and the valve body 1 .

[0051] In order to seal the gap between the manual rotating rod 21 and the valve body 1, in this embodiment, a sealing member 23 for sealing the gap between the manual rotating rod 21 and the valve body 1 is provided between the manual rotating rod 21 and the valve body 1. Figure 1 and Figure 3 As shown, a groove is provided on the manual rotating rod 21 along the outer peripheral wall of the manual rotating rod 21, and a sealing member 23 is provided in the groove. In a specific implementation, the sealing member 23 can preferably be a sealing ring.

[0052] In order to prevent the seal 23 from squeezing into the gap between the manual rotating rod 21 and the valve body 1 during the rotation of the manual rotating rod 21, in this embodiment, a retaining ring 24 is also provided on the manual rotating rod 21, and the retaining ring 24 is located on the side of the seal 23 away from the sealing valve 22. In specific implementation, the retaining ring 24 is preferably also installed in the above-mentioned groove. In this way, the structure of the manual rotating rod 21 can be simple and easy to process and manufacture.

[0053] As a preferred implementation, in this embodiment, the valve body 1 is made of aluminum alloy, and the sealing valve 22 is made of stainless steel. In this way, the difference in hardness of different materials can be used to ensure the reliability of the seal, and the selected materials are not easy to react chemically with hydrogen, which is conducive to improving the service life of the valve body 1 and the sealing valve 22. In specific implementation, the valve body 1 can be made of 6061-T6511 aluminum alloy, and the sealing valve 22 can be made of 316L stainless steel. There is a hardness difference of more than HB50 between these two materials, which can ensure a better sealing effect.

[0054] In this embodiment, the limiting portion provided on the limiting member 3 is a preferred embodiment, and the limiting portion specifically includes a limiting end plate 33 provided on the limiting member 3, and the limiting end plate 33 is located at an end away from the valve body 1. In specific implementation, the limiting end plate 33 can be integrally formed on the limiting member 3, such as Figure 1 and Figure 4 As shown, the limiting end plate 33 is provided with a through hole for the protruding end 212 of the manual turning rod 21 to pass through, and in the assembled state, the limiting end plate 33 can be blocked on the manual turning rod 21, so that the rotation stroke of the manual turning rod 21 is limited between the limiting end plate 33 and the valve body 1.

[0055] In the specific assembly of the hydrogen bottle valve structure of this embodiment, the seal 23 and the retaining ring 24 are installed in the groove on the manual rotating rod 21, and the sealing joint is screwed and fixed to the end of the manual rotating rod 21 to assemble the valve assembly 2. Then, the assembled valve assembly 2 is installed into the interior of the limiter 3, and the manual rotating rod 21 is screwed on the limiter 3, and the extended end 212 of the manual rotating rod 21 passes through the through hole on the limiter end plate 33. At this time, the valve assembly 2 and the limiter 3 are assembled into a component assembly. Then, the component assembly is installed into the installation cavity 12, and the limiter 3 is screwed on the first internal thread 1211 to complete the assembly of the hydrogen bottle valve structure. At this time, the manual rotating rod 21 can rotate within the rotation stroke defined by the limiter end plate 33 and the valve body 1.

[0056] The hydrogen bottle valve structure of this embodiment can not only ensure the normal opening of the sealing valve 22, but also effectively prevent the manual rotating rod 21 from coming out and causing the leakage of high-pressure hydrogen, thereby improving the safety and reliability of the hydrogen bottle valve structure and having a good use effect.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas cylinder valve structure, characterized in that: It comprises a valve body (1), a valve assembly (2) and a stopper (3); The valve body (1) has a medium flow channel (11) and a mounting cavity (12) communicated with the medium flow channel (11); The valve assembly (2) comprises a sealing valve (22) located in the installation cavity (12), and a manual rotating rod (21) connected to the sealing valve (22), wherein the manual rotating rod (21) is capable of rotating and drives the sealing valve (22) to open or close the medium flow channel (11); The limiting member (3) is sleeved on the manual rotating rod (21) and fixed in the mounting cavity (12); a limiting portion is provided on the limiting member (3); and a rotation stroke of the manual rotating rod (21) is defined between the limiting portion and the valve body (1).

2. The gas cylinder valve structure according to claim 1, characterized in that: The manual rotating rod (21) is threadedly connected to the limiting member (3), and / or the manual rotating rod (21) is threadedly connected to the valve body (1).

3. The gas cylinder valve structure according to claim 1, characterized in that: A sealing member (23) is provided between the manual rotating rod (21) and the valve body (1) for sealing a gap therebetween.

4. The gas cylinder valve structure according to claim 3, characterized in that: The manual rotating rod (21) is provided with a retaining ring (24), and the retaining ring (24) is located on a side of the sealing member (23) away from the sealing valve (22).

5. The gas cylinder valve structure according to claim 1, characterized in that: The sealing valve (22) has a conical sealing surface (220) for sealing the medium flow channel (11).

6. The gas cylinder valve structure according to claim 1, characterized in that: The valve body (1) is made of aluminum alloy, and the sealing valve (22) is made of stainless steel.

7. The gas cylinder valve structure according to claim 1, characterized in that: A connecting portion is provided in the installation cavity (12), and the limiting member (3) is detachably connected to the connecting portion.

8. The gas cylinder valve structure according to claim 7, characterized in that: The connection portion comprises a threaded hole formed in the installation cavity (12), and the limiting member (3) is threadedly connected to the threaded hole.

9. The gas cylinder valve structure according to claim 1, characterized in that: The limiting member (3) is provided with an operating portion (34), and the limiting member (3) can be installed in the installation cavity (12) by operating the operating portion (34).

10. The gas cylinder valve structure according to any one of claims 1 to 9, characterized in that: The limiting portion comprises a limiting end plate (33) provided on the limiting member (3), and the limiting end plate (33) is located at an end away from the valve body (1).

Images