Gas cylinder valve structure and gas cylinder device

Abstract

According to the gas cylinder valve structure and the gas cylinder device, a first piston of the gas cylinder valve structure is slidably provided with a valve body, when the first piston is located at a first limiting position, a first inserting part at the first end of the first piston can be connected with a bottle opening part in an inserted mode to open a gas cylinder, and when the first piston is located at a second limiting position, the first inserting part and the bottle opening part are distributed at intervals; the force application piece can drive the first piston to move from the second limit position to the first limit position; a first buffer cavity is formed between the force application piece and the first piston; one end of a first communication channel of the force application piece communicates with the first buffer cavity, and the other end penetrates to the part, extending out of the valve body, of the force application piece; one end of a second communication channel of the first piston is communicated with the first buffer cavity, and the other end penetrates to the first inserting part; when the first piston is located at the first limit position, the second communication channel communicates with the gas cylinder. The gas cylinder valve structure is simple in structure and convenient to operate, the problem that a gas cylinder is jacked open in the process that the gas cylinder valve structure is installed on the gas cylinder can be avoided, and the problem that flowing gas accidentally hurts operators can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas cylinders, in particular to a gas cylinder valve structure and a gas cylinder device. BACKGROUND

[0002] A gas cylinder is a kind of container widely used in chemical enterprises, which can realize the storage, transportation and effective use of gas. The commonly used gas cylinder valve structure currently usually includes a gas cylinder valve and a pressure reducing valve. The gas cylinder valve and the pressure reducing valve are separately installed. When filling gas, the pressure reducing valve is removed, the gas cylinder is filled through the gas cylinder valve, and after being filled, the pressure reducing valve is installed on the gas cylinder valve to output the reduced gas.

[0003] The gas cylinder valve structure in the related art usually opens the gas cylinder to exhaust the gas cylinder during the installation of the on-off valve to the gas cylinder, and has no direct pressure reduction effect on the exhaust gas, which causes the exhaust gas of the gas cylinder to easily injure the operators. In addition, the steps of operating the gas cylinder to exhaust the gas are complex, and the exhaust efficiency is low. SUMMARY

[0004] The purpose of the present application is to provide a gas cylinder valve structure and a gas cylinder device to solve the above problems existing in the prior art gas cylinder valve structure.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The gas cylinder valve structure includes a valve body and a piston assembly. The valve body is used to connect to the mouth of the gas cylinder. The piston assembly includes:

[0007] A first piston is arranged in the valve body along a directional sliding direction and has a first limit position and a second limit position. When the first piston is located at the first limit position, a first plug-in part at the first end of the first piston can be plugged into the mouth of the gas cylinder to open the gas cylinder. When the first piston is located at the second limit position, the first plug-in part is spaced apart from the mouth of the gas cylinder.

[0008] A force applying member is fixedly connected to the second end of the first piston and extends out of the valve body along the directional part. The force applying member can drive the first piston to move along the direction from the second limit position to the first limit position.

[0009] A first buffer cavity is formed between the force applying member and the first piston. The force applying member is also provided with a first communication channel. One end of the first communication channel directly communicates with the first buffer cavity, and the other end penetrates to the part of the force applying member extending out of the valve body. The first piston is also provided with a second communication channel. One end of the second communication channel directly communicates with the first buffer cavity, and the other end penetrates to the first plug-in part. When the first piston is located at the first limit position, the second communication channel communicates with the gas cylinder.

[0010] As an optional solution of the gas cylinder valve structure, the piston assembly further comprises a first elastic member arranged in the valve body, one end of the first elastic member abuts against or is fixedly connected with the first piston along the orientation, the other end of the first elastic member abuts against or is fixedly connected with the valve body, and the elastic restoring force of the first elastic member can drive the first piston to move away from the gas cylinder along the orientation.

[0011] As an optional solution of the gas cylinder valve structure, the valve body is provided with a first limiting surface, and the first piston abuts against the first limiting surface along the orientation when the first piston is located at the first limit position.

[0012] The gas cylinder valve structure further comprises a limiting member detachably connected with the valve body, and the first piston abuts against the limiting member along the orientation when the first piston is located at the second limit position.

[0013] As an optional solution of the gas cylinder valve structure, the piston assembly further comprises:

[0014] a second piston arranged in the first buffer cavity along the orientation, a second buffer cavity is formed between the second piston and the force applying member, the second buffer cavity is directly communicated with the first communication passage, and the second piston is further provided with a third communication passage, one end of the third communication passage is directly communicated with the second buffer cavity, and the other end of the third communication passage is directly communicated with the second communication passage.

[0015] a second elastic member arranged in the first piston along the orientation, one end of the second elastic member abuts against or is fixedly connected with the first piston, and the other end of the second elastic member abuts against or is fixedly connected with the second piston.

[0016] As an optional solution of the gas cylinder valve structure, the first piston is provided with a second limiting surface, the force applying member is provided with a third limiting surface, and the second piston can abut against the second limiting surface or the third limiting surface along the orientation.

[0017] As an optional solution of the gas cylinder valve structure, the third limiting surface is concavely provided with a first groove, the first groove is directly communicated with the first communication passage, and the second buffer cavity comprises the first groove.

[0018] As an optional solution of the gas cylinder valve structure, the valve body is inserted into the bottle mouth portion along the orientation and abuts against a fourth limiting surface of the bottle mouth portion, and the gas cylinder valve structure further comprises a connecting assembly, the connecting assembly comprises:

[0019] a locking sleeve arranged on the outer periphery of the valve body along the orientation.

[0020] A third elastic member is sleeved on the outer periphery of the valve body, and the outer periphery of the valve body is provided with a fifth limiting surface, one end of the third elastic member abuts against the fifth limiting surface, and the other end abuts against the locking sleeve.

[0021] A locking bead is provided, the outer periphery of the bottle mouth portion is concavely provided with a second groove, the valve body is provided with a through hole, and the locking bead can be inserted into the through hole and the second groove; the elastic restoring force of the third elastic member can drive the locking sleeve to slide along the orientation towards the direction close to the bottle mouth portion to close the through hole.

[0022] As an optional solution of the gas cylinder valve structure, the gas cylinder valve structure further comprises an adjusting assembly, the adjusting assembly comprises a rotating frame and an adjusting pad, the rotating frame is rotationally connected to the outer periphery of the valve body and movably connected with the locking sleeve.

[0023] The rotating frame has a first rotating position parallel to the orientation and a second rotating position arranged at an angle with the orientation, when the rotating frame is located at the first rotating position, the adjusting pad can be clamped between the rotating frame and the elastic member along the orientation, when the rotating frame is rotated from the first rotating position to the second rotating position, the rotating frame can synchronously drive the locking sleeve to move along the orientation away from the bottle mouth portion to open the through hole, and when the rotating frame is rotated from the second rotating position to the first rotating position, the rotating frame can synchronously drive the locking sleeve to move along the orientation towards the bottle mouth portion to close the through hole.

[0024] As an optional solution of the gas cylinder valve structure, the outer periphery of the locking sleeve is provided with two movable connecting portions, the rotating frame is provided with two guide grooves, and the two movable connecting portions are movably arranged in the two guide grooves one by one; the inner side wall of the guide groove is formed with a guide surface, when the rotating frame is located at the first rotating position, the guide surface is distributed at an angle with the orientation, and the guide surface is used for guiding the movable connecting portion to slide along the orientation.

[0025] A gas cylinder device comprises a gas cylinder and a switch valve, the switch valve is arranged on the bottle mouth portion, and further comprises the above-mentioned gas cylinder valve structure, and the first insertion portion can open the switch valve to communicate with the gas cylinder.

[0026] The beneficial effects of the present application are as follows:

[0027] The application provides a gas cylinder valve structure and a gas cylinder device. The gas cylinder valve structure comprises a valve body and a piston assembly, and the piston assembly comprises a first piston and a force applying element. The valve body is used for being connected to a cylinder mouth portion of a gas cylinder. The first piston is arranged in the valve body in a directional sliding mode and has a first limit position and a second limit position. When the first piston is located at the first limit position, a first inserting portion at a first end of the first piston can be inserted into the cylinder mouth portion to open the gas cylinder. When the first piston is located at the second limit position, the first inserting portion is spaced apart from the cylinder mouth portion. The force applying element is fixedly connected to a second end of the first piston and extends out of the valve body in a directional part. The force applying element can drive the first piston to move from the second limit position to the first limit position in the direction. A first buffer cavity is formed between the force applying element and the first piston. The force applying element is further provided with a first communication channel, one end of the first communication channel is directly communicated with the first buffer cavity, and the other end penetrates to the part of the force applying element extending out of the valve body. The first piston is further provided with a second communication channel, one end of the second communication channel is directly communicated with the first buffer cavity, and the other end penetrates to the first inserting portion. When the first piston is located at the first limit position, the second communication channel is communicated with the gas cylinder.

[0028] Before the gas cylinder valve structure is installed on the cylinder mouth portion of the gas cylinder, the first piston is controlled to be kept at the second limit position. After the gas cylinder valve structure is installed on the cylinder mouth portion of the gas cylinder, that is, after the gas cylinder valve structure is assembled with the gas cylinder, the force applying element is used to apply force to the first piston in the direction according to actual working condition requirements, so that the first piston moves in the direction close to the cylinder mouth portion until the first piston moves from the second limit position to the first limit position, the first inserting portion is inserted into the cylinder mouth portion, and the inside of the gas cylinder, the second communication channel, the first buffer cavity and the first communication channel form a communication passage. The gas in the gas cylinder flows out through the communication passage, so that the gas cylinder can be opened as required, the problem that the gas cylinder is opened in the process of installing the gas cylinder valve structure on the gas cylinder in the prior art is avoided, and the operation of opening the gas cylinder is simple.

[0029] Secondly, the first buffer cavity is formed between the first piston and the force applying element, so that the gas flowing out of the gas cylinder is buffered through the first buffer cavity and then flows out through the first communication channel, so that the gas flowing out of the first communication channel can effectively avoid hurting the operating personnel.

[0030] Therefore, the gas cylinder valve structure has simple structure, convenient operation of opening the gas cylinder, can effectively avoid the problem that the gas cylinder is opened in the process of installing the gas cylinder valve structure on the gas cylinder in the prior art, and can effectively avoid hurting the operating personnel by the gas flowing out of the first communication channel. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a gas cylinder device provided by the embodiment of the application;

[0032] Figure 2is a part structure schematic view of the gas cylinder device along a first visual angle when the rotating frame is located at the first rotating position according to an embodiment of the present application;

[0033] Figure 3 is a part structure schematic view of the gas cylinder device along a second visual angle when the rotating frame is located at the first rotating position according to an embodiment of the present application;

[0034] Figure 4 is a part structure schematic view of the gas cylinder device along a third visual angle when the rotating frame is located at the second rotating position according to an embodiment of the present application;

[0035] Figure 5 is a sectional view of the gas cylinder device when the rotating frame is located at the second rotating position according to an embodiment of the present application;

[0036] Figure 6 is a part sectional view of the gas cylinder device according to an embodiment of the present application;

[0037] Figure 7 is a sectional view of the force applying member according to an embodiment of the present application;

[0038] Figure 8 is a structure schematic view of the lower frame body according to an embodiment of the present application.

[0039] In the figure:

[0040] 100, gas cylinder; 110, cylinder mouth part; 111, fourth limiting surface; 112, second groove;

[0041] 1, valve body; 11, first limiting surface; 12, fifth limiting surface; 13, through hole; 14, guide hole;

[0042] 2, piston assembly;

[0043] 21, first piston; 211, first plug-in part; 212, second communication channel; 213, second limiting surface;

[0044] 22, force applying member; 221, first communication channel; 222, third limiting surface; 223, first groove; 224, sixth limiting surface;

[0045] 23, first elastic member;

[0046] 24, second piston; 241, third communication channel; 242, piston part; 243, second plug-in part;

[0047] 25, second buffer cavity;

[0048] 26, second elastic member;

[0049] 3, limiting piece; 31, detachable connecting part; 32, limiting part;

[0050] 4, connecting assembly; 41, locking sleeve; 411, movable connecting part; 42, third elastic member; 43, locking bead; 44, limiting ring;

[0051] 5, adjusting assembly; 51, rotating frame; 511, upper frame body; 512, lower frame body; 5121, guide groove; 51211, guide surface; 5122, limiting groove; 52, adjusting pad. DETAILED DESCRIPTION

[0052] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the application are shown in the drawings rather than all the parts.

[0053] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0055] In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0056] The present application provides a gas cylinder valve structure, such as Figures 1-7As shown, the gas cylinder valve structure comprises a valve body 1 and a piston assembly 2, the piston assembly 2 comprises a first piston 21 and a force applying member 22; the valve body 1 is used for connecting to a cylinder mouth portion 110 of a gas cylinder 100; the first piston 21 is arranged in the valve body 1 along a direction and has a first limit position and a second limit position; when the first piston 21 is located at the first limit position, a first plug-in part 211 at a first end of the first piston 21 can be plugged into the cylinder mouth portion 110 to open the gas cylinder 100; when the first piston 21 is located at the second limit position, the first plug-in part 211 is spaced apart from the cylinder mouth portion 110; the force applying member 22 is fixedly connected to a second end of the first piston 21 and extends out of the valve body 1 along a direction, and the force applying member 22 can drive the first piston 21 to move from the second limit position to the first limit position along the direction; a first buffer cavity is formed between the force applying member 22 and the first piston 21; the force applying member 22 is further provided with a first communication channel 221, one end of the first communication channel 221 directly communicates with the first buffer cavity, and the other end penetrates to the part of the force applying member 22 extending out of the valve body 1; the first piston 21 is further provided with a second communication channel 212, one end of the second communication channel 212 directly communicates with the first buffer cavity, and the other end penetrates to the first plug-in part 211; when the first piston 21 is located at the first limit position, the second communication channel 212 communicates with the gas cylinder 100.

[0057] Before the gas cylinder valve structure is installed on the cylinder mouth portion 110 of the gas cylinder 100, the first piston 21 is controlled to be kept at the second limit position; after the gas cylinder valve structure is installed on the cylinder mouth portion 110 of the gas cylinder 100, that is, after the gas cylinder valve structure is assembled with the gas cylinder 100, according to actual working condition requirements, the force applying member 22 is used to apply force to the first piston 21 along a direction to make the first piston 21 move along the direction to the cylinder mouth portion 110 until the first piston 21 moves from the second limit position to the first limit position, the first plug-in part 211 is plugged into the cylinder mouth portion 110, and the inside of the gas cylinder 100, the second communication channel 212, the first buffer cavity and the first communication channel 221 form a communication passage, the gas in the gas cylinder 100 flows out through the communication passage, so that the gas cylinder 100 can be opened as required, and the problem that the gas cylinder 100 is opened in the prior art is avoided, and the operation of opening the gas cylinder 100 is simple.

[0058] Secondly, the first buffer cavity is formed between the first piston 21 and the force applying member 22, so that the gas flowing out of the gas cylinder 100 is buffered through the first buffer cavity before flowing out through the first communication channel 221, thereby effectively avoiding that the gas flowing out of the first communication channel 221 injures the operating personnel.

[0059] Therefore, the gas cylinder valve structure is simple in structure and convenient to open the gas cylinder 100, effectively avoiding the problem that the gas cylinder valve structure is installed on the gas cylinder 100 in the prior art, and effectively avoiding the gas flowing out of the first communication channel 221 from injuring the operating personnel.

[0060] Specifically, Figure 1 The up-down direction is the orientation.

[0061] Specifically, as Figure 1 shown, the mouth portion 110 of the gas cylinder 100 is provided with a switch valve, and the first plug-in portion 211 can open the switch valve to communicate with the gas cylinder 100. Specifically, the switch valve is a normally closed switch valve. When the first piston 21 is located at the first limit position, the first plug-in portion 211 opens the switch valve to communicate with the gas cylinder 100. When the first piston 21 is located at the second limit position, the first plug-in portion 211 is away from the switch valve, and the switch valve is automatically closed. Wherein, the specific structure of the switch valve and the gas cylinder 100 belongs to the prior art, so it will not be repeated here.

[0062] Optionally, as Figures 2-6 shown, the piston assembly 2 further comprises a first elastic member 23 arranged in the valve body 1. Along the orientation, one end of the first elastic member 23 is in abutment or fixed connection with the first piston 21, and the other end of the first elastic member 23 is in abutment or fixed connection with the valve body 1. The elastic restoring force of the first elastic member 23 can drive the first piston 21 to move along the orientation away from the gas cylinder 100. So that the first piston 21 can automatically move along the orientation from the first limit position to the second limit position.

[0063] As an alternative, the first piston 21 can also be moved from the first limit position to the second limit position by applying a force along the orientation to the first piston 21.

[0064] It can be understood that when the gas cylinder 100 is not needed to continue to output gas, the first piston 21 is controlled to move along the orientation from the first limit position to the second limit position, so that the first plug-in portion 211 is away from the mouth portion 110 of the gas cylinder 100, and at this time the switch valve is closed synchronously, so that the gas cylinder 100 no longer continues to output gas.

[0065] In this embodiment, the first end of the first elastic member 23 is in abutment with the first piston 21, and the other end of the first elastic member 23 is in abutment with the valve body 1. To reduce the assembly difficulty of the gas cylinder valve structure, reduce the number of parts of the gas cylinder valve structure, and reduce the production cost of the gas cylinder valve structure.

[0066] In this embodiment, as Figure 6 shown, the first elastic member 23 is a spring. In other embodiments, the first elastic member 23 can also be made of rubber or other materials with elasticity.

[0067] Optionally, as shown in Figure 5 and Figure 6 shown, the valve body 1 is provided with a first limiting surface 11, and the first piston 21 abuts against the first limiting surface 11 when the first piston 21 is located at the first limit position. Thus, the first piston 21 can be limited at the first limit position, and transition movement of the first piston 21 in the direction approaching the bottle mouth portion 110 is avoided.

[0068] Optionally, in the embodiment, as shown in Figure 5 and Figure 6 shown, the valve body 1 is formed with a guide hole 14 penetrating in the orientation, and the first insertion portion 211 is inserted into the guide hole 14. Thus, good sliding of the first piston 21 in the orientation can be achieved.

[0069] Further optionally, the inner peripheral wall of the guide hole 14 and / or the outer peripheral wall of the first insertion portion 211 is embedded with a first sealing ring for sealing the gap between the inner peripheral wall of the guide hole 14 and the outer peripheral wall of the first insertion portion 211. In the embodiment, the outer peripheral wall of the first insertion portion 211 is embedded with the first sealing ring as an example.

[0070] Optionally, as shown in Figures 2-5 shown, the gas cylinder valve structure further comprises a limiting member 3 detachably connected to the valve body 1, and the first piston 21 abuts against the limiting member 3 in the orientation when the first piston 21 is located at the second limit position. Thus, the first piston 21 can be limited at the second limit position, and transition movement of the first piston 21 in the direction away from the bottle mouth portion 110 is avoided. In addition, the limiting member 3 is detachably connected to the valve body 1, so that the first piston 21, the first elastic member 23 and other components of the piston assembly 2 can be conveniently assembled to the valve body 1.

[0071] Optionally, in the embodiment, as shown in Figures 2-5 shown, the limiting member 3 comprises a detachable connecting portion 31 and a limiting portion 32 connected to each other, the valve body 1 is formed with a first external thread, the detachable connecting portion 31 is provided with a first internal thread, the first external thread is threadedly matched with the first internal thread, and the limiting portion 32 is located at one end of the valve body 1 away from the bottle mouth portion 110 in the orientation. When the first piston 21 is located at the second limit position, the first piston 21 abuts against the limiting portion 32 in the orientation. Thus, the limiting member 3 can be detachably connected to the valve body 1, and the first piston 21 can be limited at the second limit position in the orientation.

[0072] In other embodiments, the limiting member 3 can also be detachably connected to the valve body 1 by insertion or other detachable connection modes. In other embodiments, the limiting member 3 can also be fixed to the valve body 1 by welding or one-piece forming or other modes.

[0073] Optionally, as shown in Figure 5As shown, the outer periphery of the force applying member 22 is provided with a second external thread, the inner periphery of the first piston 21 is provided with a second internal thread, and the second external thread is threadedly engaged with the second internal thread, so as to fixedly connect the force applying member 22 with the first piston 21; secondly, the threadedly engaged manner facilitates the assembly of the second piston 24 and the second elastic member 26 in the first buffer cavity, thereby further improving the production and assembly efficiency.

[0074] Further optionally, as shown in Figure 5 and Figure 7 the force applying member 22 is provided with a sixth limiting surface 224, which abuts against the first piston 21 along the orientation when the second external thread is threadedly engaged with the second internal thread, so as to define the relative position of the force applying member 22 and the first piston 21 along the orientation, and further improve the connection reliability of the force applying member 22 and the first piston 21.

[0075] In other embodiments, the force applying member 22 is fixedly connected with the first piston 21 by welding or the like.

[0076] Further optionally, the outer peripheral wall of the force applying member 22 and / or the inner peripheral wall of the first piston 21 is embedded with a second sealing ring, which is used to seal the gap between the outer peripheral wall of the force applying member 22 and the inner peripheral wall of the first piston 21. In this embodiment, the outer peripheral wall of the force applying member 22 is embedded with the second sealing ring as an example.

[0077] Optionally, as shown in Figures 5-7 the piston assembly 2 further comprises a second piston 24 and a second elastic member 26; the second piston 24 is slidingly arranged in the first buffer cavity along the orientation, and the second piston 24 and the force applying member 22 form a second buffer cavity 25, the second buffer cavity 25 is directly communicated with the first communication passage 221, the second piston 24 is further provided with a third communication passage 241, one end of the third communication passage 241 is directly communicated with the second buffer cavity 25, and the other end of the third communication passage 241 is directly communicated with the second communication passage 212; the second elastic member 26 is arranged in the first piston 21, and one end of the second elastic member 26 abuts against or is fixedly connected with the first piston 21 along the orientation, and the other end of the second elastic member 26 abuts against or is fixedly connected with the second piston 24.

[0078] As can be understood, as shown in Figures 5-7 the second buffer cavity 25 is a part of the first buffer cavity; the first communication passage 221, the second buffer cavity 25, the third communication passage 241 and the second communication passage 212 are sequentially communicated; when the first piston 21 moves to the first limit position along the orientation, the first plug-in part 211 opens the switch valve and is plugged into the bottle mouth part 110, the inside of the gas cylinder 100, the second communication passage 212, the third communication passage 241, the second buffer cavity 25 and the first communication passage 221 form a communication passage, and the gas in the gas cylinder 100 flows out through the communication passage.

[0079] By setting the second piston 24 and the second elastic member 26 in the first buffer cavity, the volume of the second buffer cavity 25 can be adaptively increased or decreased according to the pressure of the gas flowing out of the gas cylinder 100. Specifically, the greater the pressure of the gas flowing out of the gas cylinder 100, the greater the moving amount of the second piston 24 driven by the gas entering the second buffer cavity 25 in the direction of approaching the bottle mouth portion 110, and the greater the volume of the second buffer cavity 25; the smaller the pressure of the gas flowing out of the gas cylinder 100, the smaller the moving amount of the second piston 24 driven by the gas entering the second buffer cavity 25 in the direction of approaching the bottle mouth portion 110, and the smaller the volume of the second buffer cavity 25. By such a setting, the gas cylinder valve structure can substantially stably discharge the gas in the gas cylinder 100 at the same exhaust pressure for different pressure sizes of the gas flowing out of the gas cylinder 100, thereby further improving the pressure reduction effect, use performance and use safety of the gas cylinder valve structure; secondly, driving the second piston 24 to move in the direction does not require additional external force, which can avoid energy consumption.

[0080] In the embodiment, one end of the second elastic member 26 is abutted with the first piston 21, and the other end of the second elastic member 26 is abutted with the second piston 24. This can further reduce the assembly difficulty of the gas cylinder valve structure, further reduce the number of parts of the gas cylinder valve structure, and further reduce the production cost of the gas cylinder valve structure.

[0081] In the embodiment, as shown in Figure 5 and Figure 6 , the second elastic member 26 is a spring. In other embodiments, the second elastic member 26 can also be made of other elastic materials such as rubber.

[0082] In the embodiment, as shown in Figure 5 and Figure 6 , the second piston 24 includes a piston portion 242 and a second plug-in portion 243 connected with each other, the piston portion 242 is slidingly arranged in the first buffer cavity in the direction, and the second plug-in portion 243 is plugged into the second communication channel 212 in the direction. Thus, the second piston 24 can be well defined to slide in the direction. In the embodiment, one end of the third communication channel 241 penetrates the outer wall of the piston portion 242, and the other end penetrates the outer wall of the second plug-in portion 243.

[0083] Specifically, as shown in Figures 5-7As shown, the first piston 21 is provided with a second limit surface 213, the force applying member 22 is provided with a third limit surface 222, and the second piston 24 is capable of abutting against the second limit surface 213 or the third limit surface 222 in the orientation. This achieves the purpose of limiting the sliding range of the second piston 24 in the orientation, and limiting the volume variation range of the second buffer cavity 25. It can be understood that when the second piston 24 abuts against the third limit surface 222 in the orientation, the volume of the second buffer cavity 25 is the smallest, and when the second piston 24 abuts against the second limit surface 213 in the orientation, the volume of the second buffer cavity 25 is the largest.

[0084] Optionally, as shown, Figures 5-7 The third limit surface 222 is concavely provided with a first recess 223, the first recess 223 is directly communicated with the first communication channel 221, and the second buffer cavity 25 comprises the first recess 223. By concavely providing the first recess 223 on the third limit surface 222, when the second piston 24 abuts against the third limit surface 222 in the orientation, the volume of the second buffer cavity 25 is greater than zero, which can effectively avoid the second piston 24 from being adsorbed on the force applying member 22, and can effectively reduce the weight of the force applying member 22.

[0085] Further optionally, the outer peripheral wall of the piston part 242 and / or the inner peripheral wall of the first piston 21 is embedded with a third sealing ring, which is used to seal the gap between the outer peripheral wall of the piston part 242 and the inner peripheral wall of the first piston 21. In the embodiment, the outer peripheral wall of the piston part 242 is embedded with the third sealing ring as an example.

[0086] In the embodiment, as shown, Figure 5 The valve body 1 is inserted into the bottle mouth part 110 in the orientation and abuts against the fourth limit surface 111 of the bottle mouth part 110. This achieves the purpose of limiting the relative position of the valve body 1 and the bottle mouth part 110 in the orientation.

[0087] Optionally, as shown, Figures 1-5 The gas cylinder valve structure further comprises a connecting assembly 4, the connecting assembly 4 comprises a locking sleeve 41, a third elastic member 42 and a locking bead 43; the locking sleeve 41 is arranged on the outer periphery of the valve body 1 in the orientation; the third elastic member 42 is sleeved on the outer periphery of the valve body 1; the outer periphery of the valve body 1 is provided with a fifth limit surface 12, one end of the third elastic member 42 abuts against the fifth limit surface 12, and the other end abuts against the locking sleeve 41; the outer periphery of the bottle mouth part 110 is concavely provided with a second recess 112, the valve body 1 is provided with a through hole 13, and the locking bead 43 can be inserted into the through hole 13 and the second recess 112; the elastic restoring force of the third elastic member 42 can drive the locking sleeve 41 to slide in the orientation towards the bottle mouth part 110 to close the through hole 13.

[0088] To connect the gas cylinder valve structure to the bottle mouth part 110 of the gas cylinder 100, the valve body 1 is inserted into the bottle mouth part 110, the locking sleeve 41 is slid in the direction away from the bottle mouth part 110, and the third elastic member 42 is compressed. When the through hole 13 and the second groove 112 are exposed, the locking bead 43 is inserted into the through hole 13 and the second groove 112, and the locking sleeve 41 is released. At this time, the locking sleeve 41 is loosened, and the locking sleeve 41 moves in the direction close to the bottle mouth part 110 under the elastic restoring force of the third elastic member 42 to close the through hole 13. The locking bead 43 is limited in the through hole 13 and the second groove 112, so that the relative position of the valve body 1 and the bottle mouth part 110 is locked, and the gas cylinder valve structure is connected to the bottle mouth part 110.

[0089] To disconnect the gas cylinder valve structure from the bottle mouth part 110 of the gas cylinder 100, the locking sleeve 41 is slid in the direction away from the bottle mouth part 110, and the through hole 13 is exposed. In this process, the third elastic member 42 is compressed. When the locking bead 43 is exposed, the locking bead 43 is disconnected from the through hole 13 and the second groove 112. Then, the gas cylinder valve structure as a whole is disconnected from the bottle mouth part 110.

[0090] Such a design makes the structure simple and easy to operate when connecting or disconnecting the gas cylinder valve structure to the bottle mouth part 110.

[0091] In this embodiment, the second groove 112 is an annular groove. This facilitates the insertion of the locking bead 43 into the through hole 13 and the second groove 112, and allows the gas cylinder valve structure to rotate relative to the bottle mouth part 110, thereby further improving the use performance of the gas cylinder valve structure. In other embodiments, the second groove 112 can also be a semispherical or semispherical-like groove, and the locking bead 43 can also be inserted into the through hole 13 and the second groove 112.

[0092] Further, for the second groove 112 being an annular groove: the number of locking beads 43 and through holes 13 is at least two, and at least two locking beads 43 and at least two through holes 13 are arranged one by one. To further improve the stability of connecting the gas cylinder valve structure to the bottle mouth part 110. As shown in Figure 5 , the second groove 112 is an annular groove; the number of locking beads 43 and through holes 13 is two.

[0093] Further, for the second groove 112 being a semispherical or semispherical-like groove: the number of locking beads 43, through holes 13 and second grooves 112 is at least two, and at least two locking beads 43, at least two through holes 13 and at least two second grooves 112 are arranged one by one. To further improve the stability of connecting the gas cylinder valve structure to the bottle mouth part 110.

[0094] Specifically, as shown in Figure 5As shown, the connecting assembly 4 further comprises a limiting ring 44. As shown Figure 5 As shown, the outer peripheral wall of the valve body 1 is embedded with the limiting ring 44, which is capable of abutting against the locking sleeve 41 along the orientation, and when the limiting ring 44 abuts against the locking sleeve 41 along the orientation, the locking sleeve 41 closes the opening; and / or, the inner peripheral wall of the locking sleeve 41 is embedded with the limiting ring 44, which is capable of abutting against the valve body 1 along the orientation, and when the limiting ring 44 abuts against the valve body 1 along the orientation, the locking sleeve 41 closes the through hole 13. Further, as shown Figure 5 As shown, when the locking sleeve 41 abuts against the fifth limiting surface 12 along the orientation, the locking sleeve 41 opens the through hole 13. So as to define the sliding range of the locking sleeve 41 along the orientation; secondly, to facilitate the assembly, disassembly, replacement or maintenance of the connecting assembly 4.

[0095] Further optionally, as shown Figures 1-5 As shown, the cylinder valve structure further comprises an adjusting assembly 5, which comprises a rotating frame 51 and an adjusting pad 52, the rotating frame 51 is rotationally connected to the outer periphery of the valve body 1 and movably connected with the locking sleeve 41; the rotating frame 51 has a first rotation position parallel to the orientation, and a second rotation position arranged at an angle with the orientation, when the rotating frame 51 is located at the first rotation position, the adjusting pad 52 can be clamped between the rotating frame 51 and the force applying member 22 along the orientation, when the rotating frame 51 is rotated from the first rotation position to the second rotation position, the rotating frame 51 can synchronously drive the locking sleeve 41 to move away from the bottle mouth portion 110 along the orientation to open the through hole 13, and when the rotating frame 51 is rotated from the second rotation position to the first rotation position, the rotating frame 51 can synchronously drive the locking sleeve 41 to move towards the bottle mouth portion 110 along the orientation to close the through hole 13.

[0096] When the rotating frame 51 is located at the first rotation position, by clamping the force applying member 22 between the rotating frame 51 and the force applying member 22, the constant force along the orientation applied to the force applying member 22 can be maintained, so that the first piston 21 can be kept at the first limit position to enable the cylinder 100 to exhaust through the cylinder valve structure, thereby further improving the working performance of the cylinder 100 valve. It can be understood that when the thickness of the adjusting pad 52 along the orientation is different, the insertion depth of the first piston 21 inserted into the cylinder 100 along the orientation is different. When the cylinder 100 stops exhausting, the adjusting pad 52 can be removed.

[0097] To detach the cylinder 100 valve from the bottle mouth portion 110 of the cylinder 100, rotate the rotating frame 51 from the first rotation position to the second rotation position, drive the locking sleeve 41 to move away from the bottle mouth portion 110 along the orientation to open the through hole 13, so that the locking bead 43 is exposed, then detach the locking bead 43 from the through hole 13 and the second groove 112, and then detach the cylinder valve structure as a whole from the bottle mouth portion 110. Compared with directly applying force to the locking sleeve 41 along the orientation away from the bottle mouth portion 110, it is further convenient and labor-saving.

[0098] When the rotating frame 51 is rotated from the second rotating position to the first rotating position, the rotating frame 51 synchronously drives the locking sleeve 41 to move along the orientation towards the direction close to the bottle mouth part 110 to close the through hole 13, so as to avoid the separation of the gas cylinder valve structure and the bottle mouth part 110 caused by the misoperation.

[0099] In other embodiments, the first piston 21 can also be directly pressed along the orientation to be located at the first limit position, or the first piston 21 is kept at the first limit position.

[0100] In other embodiments, the locking sleeve 41 can also be directly applied with the force along the orientation towards the direction away from the bottle mouth part 110 to open the through hole 13.

[0101] It can be understood that the elastic restoring force of the third elastic member 42 is also the driving force for driving the locking sleeve 41 to move along the orientation towards the direction close to the bottle mouth part 110 to close the through hole 13.

[0102] Specifically, as shown in Figures 1-4 and Figure 8 , the outer periphery of the locking sleeve 41 is provided with two movable connection parts 411, and the rotating frame 51 is provided with two guide grooves 5121, and the two movable connection parts 411 are movably arranged in the two guide grooves 5121 one by one; the inner side wall of the guide groove 5121 is formed with a guide surface 51211, and when the rotating frame 51 is located at the first rotating position, the guide surface 51211 is distributed at an angle with the orientation, and the guide surface 51211 is used to guide the movable connection part 411 to slide along the orientation. When the rotating frame 51 is rotated from the first rotating position to the second rotating position, the rotating frame 51 synchronously drives the locking sleeve 41 to move along the orientation towards the direction away from the bottle mouth part 110 to open the through hole 13, and when the rotating frame 51 is rotated from the second rotating position to the first rotating position, the rotating frame 51 synchronously drives the locking sleeve 41 to move along the orientation towards the direction close to the bottle mouth part 110 to close the through hole 13.

[0103] Further optionally, as shown in Figures 1-4 and Figure 8 , the rotating frame 51 is further provided with two limiting grooves 5122, and the two limiting grooves 5122 are arranged one by one with the two movable connection parts 411; the limiting groove 5122 is located at the top of the guide groove 5121 and communicates with the guide groove 5121, and when the movable connection part 411 moves along the guide surface 51211 to the limiting groove 5122, the limiting groove 5122 temporarily limits the movable connection part 411 in the limiting groove 5122. So that the locking sleeve 41 can be temporarily kept in the state of opening the through hole 13, thereby facilitating the dismounting of the locking bead 43.

[0104] In this embodiment, as shown in Figure 2 , Figure 3 andFigure 5 As shown, the third elastic element 42 is a spring. In other embodiments, the third elastic element 42 may also be made of other elastic materials such as rubber.

[0105] In this embodiment, as Figures 1-5 and Figure 8 As shown, the rotating frame 51 includes an upper frame 511 and a lower frame 512 fixedly connected. When the rotating frame 51 is in the first rotating position, the adjusting pad 52 can be clamped between the upper frame 511 and the force-applying member 22 along the orientation. The lower frame 512 is rotatably connected to the valve body 1 and is provided with a guide groove 5121 and a limiting groove 5122. This facilitates the processing of the rotating frame 51. The fixed connection method is threaded connection or welding, etc. Specifically, the rotating frame 51 is generally n-shaped. In other embodiments, the upper frame 511 and the lower frame 512 of the rotating frame 51 can also be integrally formed.

[0106] In other embodiments, the locking sleeve 41 can be adapted to meet actual working conditions: it can be slidably fitted onto the outer periphery of the valve body 1 and fixedly connected to the external structure. When the gas cylinder valve structure and the cylinder opening 110 are to be connected, the external structure and / or the gas cylinder 100 can be moved in a directional manner to allow the locking sleeve 41 to slide in a directional manner and open the through hole 13.

[0107] The present invention also provides a gas cylinder device, such as Figure 1 As shown, the device includes a gas cylinder 100, a switch valve, and the aforementioned gas cylinder valve structure. The switch valve is located at the cylinder opening 110, and the first connector 211 can open the switch valve to connect with the gas cylinder 100. By adopting the aforementioned gas cylinder valve structure, the ease of operation and safety of use of the gas cylinder device can be effectively improved, and the production cost of the gas cylinder device can be effectively reduced.

[0108] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cylinder valve structure, characterized by, The valve structure comprises a valve body (1) and a piston assembly (2), the valve body (1) is used for connecting to a bottle mouth (110) of a gas cylinder (100), the piston assembly (2) comprises: a first piston (21) arranged in a sliding manner along a direction in the valve body (1) and having a first limit position and a second limit position, when the first piston (21) is located at the first limit position, a first plug-in part (211) at a first end of the first piston (21) can be plugged into the bottle mouth (110) to open the gas cylinder (100), when the first piston (21) is located at the second limit position, the first plug-in part (211) is spaced apart from the bottle mouth (110); a force applying member (22) fixedly connected to a second end of the first piston (21) and extending out of the valve body (1) along the direction, the force applying member (22) can drive the first piston (21) to move from the second limit position to the first limit position along the direction; a first buffer cavity is formed between the force applying member (22) and the first piston (21), the force applying member (22) is further provided with a first communication channel (221), one end of the first communication channel (221) directly communicates with the first buffer cavity, and the other end penetrates to a part of the force applying member (22) extending out of the valve body (1), the first piston (21) is further provided with a second communication channel (212), one end of the second communication channel (212) directly communicates with the first buffer cavity, and the other end penetrates to the first plug-in part (211), when the first piston (21) is located at the first limit position, the second communication channel (212) communicates with the gas cylinder (100).

2. The gas cylinder valve structure according to claim 1, characterized in that, The piston assembly (2) further comprises a first elastic member (23) arranged in the valve body (1), one end of the first elastic member (23) abuts against or is fixedly connected to the first piston (21) along the direction, the other end of the first elastic member (23) abuts against or is fixedly connected to the valve body (1), and the elastic restoring force of the first elastic member (23) can drive the first piston (21) to move away from the gas cylinder (100) along the direction.

3. The valve structure of the gas cylinder according to claim 1, wherein: the valve body (1) is provided with a first limit surface (11), when the first piston (21) is located at the first limit position, the first piston (21) abuts against the first limit surface (11) along the direction; the valve structure further comprises a limit member (3) detachably connected to the valve body (1), when the first piston (21) is located at the second limit position, the first piston (21) abuts against the limit member (3) along the direction.

4. The cylinder valve structure according to any one of claims 1 to 3, characterized in that, the piston assembly (2) further comprises: A second piston (24) is arranged in the first buffer cavity along the orientation, a second buffer cavity (25) is formed between the second piston (24) and the force applying member (22), the second buffer cavity (25) is directly communicated with the first communication channel (221), the second piston (24) is further provided with a third communication channel (241), one end of the third communication channel (241) is directly communicated with the second buffer cavity (25), and the other end of the third communication channel (241) is directly communicated with the second communication channel (212); A second elastic member (26) is arranged in the first piston (21) along the orientation, one end of the second elastic member (26) is abutted or fixedly connected with the first piston (21), and the other end of the second elastic member (26) is abutted or fixedly connected with the second piston (24).

5. The gas cylinder valve structure according to claim 4, characterized in that, The first piston (21) is provided with a second limiting surface (213), the force applying member (22) is provided with a third limiting surface (222), and the second piston (24) can abut the second limiting surface (213) or the third limiting surface (222) along the orientation.

6. The gas cylinder valve structure according to claim 5, wherein The third limiting surface (222) is concavely provided with a first groove (223), the first groove (223) is directly communicated with the first communication channel (221), and the second buffer cavity (25) comprises the first groove (223).

7. The cylinder valve structure according to any one of claims 1 to 3, characterized in that, The valve body (1) is inserted into the bottle mouth portion (110) along the orientation and abuts a fourth limiting surface (111) of the bottle mouth portion (110); the gas cylinder valve structure further comprises a connecting assembly (4) comprising: A locking sleeve (41) is arranged on the outer periphery of the valve body (1) along the orientation; A third elastic member (42) is sleeved on the outer periphery of the valve body (1); the outer periphery of the valve body (1) is provided with a fifth limiting surface (12), one end of the third elastic member (42) abuts the fifth limiting surface (12), and the other end of the third elastic member (42) abuts the locking sleeve (41); A locking bead (43) is arranged on the outer periphery of the bottle mouth portion (110) and concavely provided with a second groove (112), the valve body (1) is provided with a through hole (13), and the locking bead (43) can be inserted into the through hole (13) and the second groove (112); the elastic restoring force of the third elastic member (42) can drive the locking sleeve (41) to slide along the orientation towards the bottle mouth portion (110) to close the through hole (13).

8. The cylinder valve structure according to claim 7, characterized in that The gas cylinder valve structure further comprises an adjusting assembly (5) comprising a rotating frame (51) and an adjusting pad (52), the rotating frame (51) is rotatably connected to the outer periphery of the valve body (1) and movably connected with the locking sleeve (41); The rotating frame (51) has a first rotating position parallel to the orientation and a second rotating position at an angle to the orientation, when the rotating frame (51) is at the first rotating position, the adjusting pad (52) can be clamped between the rotating frame (51) and the force applying member (22) along the orientation, when the rotating frame (51) is rotated from the first rotating position to the second rotating position, the rotating frame (51) can synchronously drive the locking sleeve (41) to move along the orientation away from the bottle mouth part (110) to open the through hole (13), when the rotating frame (51) is rotated from the second rotating position to the first rotating position, the rotating frame (51) can synchronously drive the locking sleeve (41) to move along the orientation to close the through hole (13).

9. The cylinder valve structure according to claim 8, characterized in that The outer periphery of the locking sleeve (41) is provided with two movable connecting parts (411), the rotating frame (51) is provided with two guide grooves (5121), and the two movable connecting parts (411) are movably arranged in the two guide grooves (5121) one by one; the inner side wall of the guide groove (5121) is formed with a guide surface (51211), when the rotating frame (51) is at the first rotating position, the guide surface (51211) is distributed at an angle to the orientation, and the guide surface (51211) is used for guiding the movable connecting part (411) to slide along the orientation.

10. A cylinder apparatus comprising a cylinder (100) and a shut-off valve provided at a mouth portion (110) of the cylinder, characterized by Also comprising the gas cylinder valve structure of any one of claims 1-9, the first plug-in part (211) can open the switch valve to communicate with the gas cylinder (100).

Images