Self-closing valve

Abstract

The utility model relates to the technical field of valve bodies, and provides a self-closing valve which comprises a valve shell, a valve element assembly and a hand wheel. The valve element assembly comprises a neck bush arranged in the flow channel, a first valve element and a valve rod, the neck bush is arranged on the inner wall of the flow channel in a sleeving mode, the first valve element is connected with the valve rod, and the valve rod can reciprocate in the axial direction of the flow channel; the hand wheel is rotationally connected to the valve shell, connected with the valve rod and used for driving the valve rod to drive the first valve element to move in a reciprocating mode so that the first valve element can be switched between the closing position and the opening position. At the closing position, at least part of the first valve element is embedded into the neck bush so as to block the flow channel; at the opening position, the first valve element is separated from the neck bush so as to conduct the flow channel. The problem that the liquefied gas bottle is accidentally opened in the transportation and storage process can be effectively solved, the gas leakage phenomenon is prevented, and the use safety is improved.

Description

Technical Field

[0001] The present application relates to the field of valve body technology, and in particular provides a self-closing valve. Background Art

[0002] Liquefied gas cylinders are usually used to store liquefied gas for domestic use. Liquefied gas cylinders are equipped with angle valves. The liquefied gas cylinders can be opened or closed by turning the handwheel on the angle valve.

[0003] At present, during the transportation or storage of liquefied gas cylinders, it is easy for the hand wheel to be accidentally opened, resulting in gas leakage, which poses a high safety risk. Utility Model Content

[0004] The purpose of the embodiment of the present application is to provide a self-closing valve, which is intended to solve the problem of accidental opening of liquefied gas cylinders during transportation and storage.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] The present application provides a self-closing valve, comprising:

[0007] A valve housing having a flow passage;

[0008] A valve core assembly, comprising an inner sleeve arranged in the flow channel, a first valve core and a valve stem, wherein the inner sleeve is arranged on the inner wall of the flow channel, the first valve core is connected to the valve stem, and the valve stem can reciprocate along the axial direction of the flow channel;

[0009] A hand wheel, rotatably connected to the valve housing and connected to the valve stem, for driving the valve stem to drive the first valve core to move back and forth, so that the first valve core switches between a closed position and an open position;

[0010] In the closed position, at least a portion of the first valve core is embedded in the inner sleeve to block the flow channel;

[0011] In the open position, the first valve core is separated from the inner sleeve to open the flow channel.

[0012] Optionally, a first guide cover is provided at one end of the valve housing away from the hand wheel, the first guide cover is provided with a fluid inlet connected to the flow channel, and the first guide cover is provided with a first guide hole, and the valve stem is inserted into the first guide hole through the inner sleeve.

[0013] Optionally, a first guide sleeve is provided on a side of the first guide cover facing the inner sleeve, the first guide sleeve is connected to the first guide hole, and the valve stem is inserted into the first guide sleeve.

[0014] Optionally, the valve core assembly further includes an elastic member, wherein the elastic member is sleeved on the valve stem and located between the first valve core and the first guide cover.

[0015] Optionally, a fluid outlet communicating with the flow channel is further provided on the side of the valve housing; the hand wheel is connected to a second valve core, the second valve core is provided in the flow channel and connected to the valve stem;

[0016] In the closed position, the second valve core closes or opens the fluid outlet;

[0017] In the open position, the second valve core opens the fluid outlet.

[0018] Optionally, the second valve core is threadedly connected to the inner wall of the flow channel.

[0019] Optionally, the valve housing is further provided with an external pipe, and the external pipe is connected to the fluid outlet.

[0020] Optionally, a second guide cover is provided in the flow channel, the second guide cover is located between the inner sleeve and the fluid outlet, the first valve core is located between the first guide cover and the second guide cover, and the second guide cover is provided with a flow hole connected to the flow channel, the second guide cover is provided with a second guide hole, and the valve stem is inserted into the second guide hole.

[0021] Optionally, a second guide sleeve is provided on a side of the second guide cover facing the inner sleeve, the second guide sleeve is connected to the second guide hole, and the valve stem is inserted into the second guide sleeve.

[0022] Optionally, an outer wall of the first valve core is provided with a receiving groove along the circumferential direction, and a sealing ring is provided in the receiving groove.

[0023] The beneficial effect of the self-closing valve provided in the present application is that the present application can effectively solve the problem of accidental opening of liquefied gas cylinders during transportation and storage, prevent gas leakage, and improve safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a self-closing valve provided in an embodiment of the present application;

[0026] Figure 2A structural cross-sectional view of a self-closing valve provided in an embodiment of the present application.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Valve housing; 2. Hand wheel; 3. Flow channel; 4. Inner bushing; 5. First valve core; 6. Valve stem;

[0029] 7. first guide cover; 8. fluid inlet; 9. first guide hole; 10. first guide sleeve;

[0030] 11. elastic member; 12. fluid outlet; 13. second valve core; 14. external pipe;

[0031] 15. second guide cover; 16. flow hole; 17. second guide hole; 18. second guide sleeve;

[0032] 19. Sealing ring. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application 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 should not be understood as a limitation on the embodiments of the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] According to one embodiment of the present application, referring to Figure 1 and Figure 2 As shown, the present application provides a self-closing valve, which mainly includes: a valve housing 1, a valve core assembly and a hand wheel 2. Among them, the valve housing 1 is provided with a flow channel 3; the valve core assembly includes an inner sleeve 4, a first valve core 5 and a valve stem 6 arranged in the flow channel 3, the inner sleeve 4 is arranged on the inner wall of the flow channel 3, the inner sleeve 4 is a hollow kit with two ends open, the first valve core 5 is connected to the valve stem 6, and the valve stem 6 can reciprocate along the axial direction X of the flow channel 3, thereby driving the first valve core 5 to reciprocate in the direction close to or away from the inner sleeve 4; the hand wheel 2 is rotatably connected to the valve housing 1 and connected to the valve stem 6, and is used to drive the valve stem 6 to drive the first valve core 5 to reciprocate, so that the first valve core 5 switches between the closed position and the open position; in the closed position, at least part of the first valve core 5 is embedded in the inner sleeve 4 to block the flow channel 3; in the open position, the first valve core 5 is separated from the inner sleeve 4 to conduct the flow channel 3.

[0038] It can be understood that, since at least part of the first valve core 5 is built into the inner sleeve 4 in the closed position, when it is necessary to switch from the closed position to the open position, the hand wheel 2 needs to be rotated a certain number of times to gradually move the first valve core 5 outward from the inner sleeve 4. This design can prevent the first valve core 5 from immediately opening the flow channel 3 due to a slight rotation of the hand wheel 2, thereby avoiding accidental air leakage.

[0039] For example, when the hand wheel 2 is turned in the opening direction for no more than a preset number of turns (e.g., 0.5 turns), the first valve core 5 is still in the inner sleeve 4, closing the flow channel 3. Only when the hand wheel 2 is turned for more than the preset number of turns can the first valve core 5 be separated from the inner sleeve 4 to open the flow channel 3. By setting a specific number of turns as a safety threshold, it is ensured that the first valve core 5 remains in a blocked state, i.e., a closed position, before reaching this rotation range. This design clearly defines the boundaries of safe operation and reduces the possibility of accidental air leakage.

[0040] The self-closing valve of the present application adopts an opening process with a transitional stage, that is, the first valve core 5 needs to rotate a preset number of times before it can completely separate from the inner sleeve 4 to achieve the conduction of the flow channel 3. This design requires the user to consciously and continuously turn the hand wheel 2, rather than just a slight or unintentional touch, thereby greatly reducing the risk of accidental opening of the self-closing valve due to misoperation or external force impact.

[0041] Therefore, the self-closing valve provided in the embodiment of the present application can effectively solve the problem of accidental opening of liquefied gas cylinders during transportation and storage, thereby improving safety of use.

[0042] According to one embodiment of the present application, referring to Figure 2 As shown, a first guide cover 7 is provided at one end of the valve housing 1 away from the hand wheel 2, and the first guide cover 7 is provided with a fluid inlet 8 connected to the flow channel 3. During assembly, the valve housing 1 of the self-closing valve is installed on the liquefied gas cylinder, and the liquefied gas in the liquefied gas cylinder can flow into the flow channel 3 of the self-closing valve through the fluid inlet 8; and the first guide cover 7 is provided with a first guide hole 9, and the valve stem 6 is inserted into the first guide hole 9 through the inner sleeve 4.

[0043] For example, a first guide hole 9 is provided in the middle of the first guide cover 7 , and a plurality of fluid inlets 8 are arranged around the first guide hole 9 at intervals.

[0044] In this embodiment of the present application, by providing the first guide cover 7, especially the first guide hole 9 therein, a precise guide path is provided for the movement of the valve stem 6, which can reduce the possibility of deviation of the first valve core 5. When the handwheel 2 is closed, the first valve core 5 can be aligned with the inner sleeve 4 and sealed, thereby improving the stability and accuracy of the movement of the first valve core 5.

[0045] According to one embodiment of the present application, referring to Figure 2 As shown, a first guide sleeve 10 is provided on the side of the first guide cover 7 facing the inner sleeve 4 . The first guide sleeve 10 is connected to the first guide hole 9 , and the valve stem 6 is inserted into the first guide sleeve 10 .

[0046] In this embodiment of the present application, by further designing the first guide sleeve 10, the valve stem 6 forms a continuous and smooth transition from the first guide sleeve 10 to the first guide hole 9 during the insertion process, further improving the guiding continuity and operation accuracy of the valve stem 6. Such a design helps to reduce the shaking or deflection of the valve stem 6 during the movement process, ensuring that the opening and closing actions of the first valve core 5 are more accurate. In addition, the first guide sleeve 10 can enhance the overall structural strength of the first guide cover 7.

[0047] According to one embodiment of the present application, referring to Figure 2As shown, the valve core assembly further includes an elastic member 11, which is sleeved on the valve stem 6 and located between the first valve core 5 and the first guide cover 7. The specific type of the elastic member 11 of the present application is not particularly limited, and can be, for example, a spring.

[0048] Specifically, when the handwheel 2 is rotated to open, the first valve core 5 is driven to move upward through the valve stem 6, the elastic part 11 is stretched, the first valve core 5 gradually separates from the inner sleeve 4, and the flow channel 3 is opened; when the handwheel 2 is rotated to close, the first valve core 5 is driven to move downward through the valve stem 6, the elastic part 11 is compressed, the first valve core 5 is embedded in the inner sleeve 4, and the flow channel 3 is closed.

[0049] According to one embodiment of the present application, referring to Figure 2 As shown, the side of the valve housing 1 is also provided with a fluid outlet 12 connected to the flow channel 3; the hand wheel 2 is connected to a second valve core 13, the second valve core 13 is arranged in the flow channel 3 and connected to the valve stem 6; in the closed position, the second valve core 13 closes or opens the fluid outlet 12; in the open position, the second valve core 13 opens the fluid outlet 12.

[0050] Specifically, the second valve core 13 can be connected to the valve stem 6 by means of clamping, threaded connection, integral connection or abutment.

[0051] For example, the second valve core 13 is connected to the valve stem 6 by means of clamping, threaded connection or integral connection. When the hand wheel 2 rotates, the second valve core 13 can drive the valve stem 6 and the first valve core 5 to rotate synchronously and move back and forth up and down in the flow channel 3.

[0052] For example, the second valve core 13 is in contact with the valve stem 6. When the hand wheel 2 is rotated to close, the second valve core 13 is driven to move downward, thereby squeezing the valve stem 6 and the elastic member 11 downward, and driving the first valve core 5 to move downward; when the hand wheel 2 is rotated to open, the second valve core 13 is driven to move upward, and the valve stem 6 and the first valve core 5 move upward under the elastic force of the elastic member 11.

[0053] It can be understood that, in the closed position, if the first valve core 5 is completely embedded in the inner sleeve 4, blocking the flow channel 3, the second valve core 13 can simultaneously close the fluid outlet 12, thereby realizing a double insurance mechanism; if the hand wheel 2 is gradually turned to open, the second valve core 13 can first open the fluid outlet 12, but at this time the first valve core 5 is still in the inner sleeve 4 and has not yet separated from the inner sleeve 4, that is, it is still in the closed position, thereby blocking the flow channel 3. Such a design can prevent the flow channel 3 from being immediately opened due to an accidental slight rotation of the hand wheel 2, thereby avoiding accidental air leakage.

[0054] When in the open position, the second valve core 13 opens the fluid outlet 12, and the first valve core 5 is separated from the inner sleeve 4, opening the flow channel 3, and the liquefied gas in the liquefied gas cylinder flows into the flow channel 3 through the fluid inlet 8 and is then discharged through the fluid outlet 12, thereby achieving gas conduction.

[0055] According to an embodiment of the present application, the second valve core 13 is threadedly connected to the inner wall of the flow channel 3. When the hand wheel 2 is turned, the second valve core 13 can be driven to move up and down in the flow channel 3, thereby controlling the valve stem 6 to drive the first valve core 5 to move.

[0056] In this embodiment of the present application, the threaded connection allows the up and down movement distance of the second valve core 13 to be controlled by designing the pitch of the thread, thereby controlling the movement distance of the first valve core 5 and adjusting the position of the first valve core 5. For example, if the thread pitch is 1 mm, the first valve core 5 rises or falls 1 mm for each turn of the hand wheel 2; if the thread pitch is 2 mm, the first valve core 5 rises or falls 2 mm for each turn of the hand wheel 2.

[0057] According to one embodiment of the present application, referring to Figure 1 and Figure 2 As shown, the valve housing 1 is further provided with an external pipe 14 , which is connected to the fluid outlet 12 of the valve housing 1 .

[0058] In this embodiment of the present application, by providing an external pipe 14, the self-closing valve can be conveniently connected to the gas pipeline, which simplifies the installation process and reduces the installation cost.

[0059] According to one embodiment of the present application, referring to Figure 2 As shown, a second guide cover 15 is provided in the flow channel 3, and the second guide cover 15 is located between the inner sleeve 4 and the fluid outlet 12. The inner sleeve 4 and the first valve core 5 are both located between the first guide cover 7 and the second guide cover 15, and the second guide cover 15 is provided with a flow hole 16 connected to the flow channel 3, and the second guide cover 15 is provided with a second guide hole 17, and the valve stem 6 is inserted into the second guide hole 17.

[0060] For example, a second guide hole 17 is provided in the middle of the second guide cover 15 , and a plurality of flow holes 16 are arranged around the second guide hole 17 at intervals.

[0061] In this embodiment of the present application, by designing the second guide cover 15, especially the second guide hole 17 therein, a continuous guide path from the second guide cover 15 to the first guide cover 7 is provided for the valve stem 6. This not only ensures the linearity of the movement of the first valve core 5 in the flow channel 3, but also enhances the stability of the entire operation process, reduces the deviation or swing of the first valve core 5, and thus ensures the precise control of the switching action of the self-closing valve.

[0062] Furthermore, through the design of the flow hole 16 on the second guide cover 15 , when the first valve core 5 is separated from the inner sleeve 4 and the flow channel 3 is opened, the liquefied gas in the flow channel 3 can flow to the fluid outlet 12 through the flow hole 16 on the second guide cover 15 .

[0063] In addition, the second guide cover 15 serves as an intermediate support structure in the flow channel 3, which can enhance the rigidity and pressure resistance of the entire flow channel 3, especially when high-pressure gas passes through, and can effectively disperse the pressure to improve the overall safety.

[0064] According to one embodiment of the present application, referring to Figure 2 As shown, a second guide sleeve 18 is provided on the side of the second guide cover 15 facing the inner bushing 4 . The second guide sleeve 18 is connected to the second guide hole 17 , and the valve stem 6 is inserted into the second guide sleeve 18 .

[0065] In this embodiment of the present application, by further designing the second guide sleeve 18, the valve stem 6 forms a continuous and smooth transition from the second guide hole 17 to the second guide sleeve 18 during the insertion process, further improving the guiding continuity and operation accuracy of the valve stem 6. Such a design helps to reduce the shaking or deflection of the valve stem 6 during the movement process, ensuring that the opening and closing actions of the first valve core 5 are more accurate. In addition, the second guide sleeve 18 can enhance the overall structural strength of the second guide cover 15.

[0066] According to one embodiment of the present application, referring to Figure 2 As shown, an outer wall of the first valve core 5 is provided with an accommodating groove along the circumferential direction, and a sealing ring 19 is provided in the accommodating groove.

[0067] In this embodiment of the present application, the sealing ring 19 is installed in the receiving groove of the first valve core 5. When the first valve core 5 is embedded in the inner sleeve 4, the sealing ring 19 is squeezed to form a tight sealing interface. This effectively prevents gas leakage when the self-closing valve is closed. Even in the face of high pressure or slight deformation caused by long-term use, the elasticity of the sealing ring 19 can ensure a good sealing effect.

[0068] Furthermore, the sealing ring 19 is a wearing part and can be replaced independently by being arranged in the accommodating groove, without replacing the first valve core 5 as a whole, thereby reducing maintenance costs.

[0069] In addition, the presence of the sealing ring 19 can reduce the friction between the first valve core 5 and the surface of the inner sleeve 4, thereby reducing wear and extending the service life.

[0070] The above are only preferred embodiments of the present application and are not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A self-closing valve, characterized in that: include: A valve housing having a flow passage; A valve core assembly, comprising an inner sleeve arranged in the flow channel, a first valve core and a valve stem, wherein the inner sleeve is arranged on the inner wall of the flow channel, the first valve core is connected to the valve stem, and the valve stem can reciprocate along the axial direction of the flow channel; A hand wheel, rotatably connected to the valve housing and connected to the valve stem, for driving the valve stem to drive the first valve core to move back and forth, so that the first valve core switches between a closed position and an open position; In the closed position, at least a portion of the first valve core is embedded in the inner sleeve to block the flow channel; In the open position, the first valve core is separated from the inner sleeve to open the flow channel.

2. The self-closing valve according to claim 1, characterized in that: A first guide cover is provided at one end of the valve housing away from the hand wheel. The first guide cover is provided with a fluid inlet connected to the flow channel, and the first guide cover is provided with a first guide hole. The valve stem is inserted into the first guide hole through the inner sleeve.

3. The self-closing valve according to claim 2, characterized in that: A first guide sleeve is provided on a side of the first guide cover facing the inner sleeve. The first guide sleeve is connected to the first guide hole, and the valve stem is inserted into the first guide sleeve.

4. The self-closing valve according to claim 2, characterized in that: The valve core assembly also includes an elastic member, which is sleeved on the valve stem and located between the first valve core and the first guide cover.

5. The self-closing valve according to claim 4, characterized in that: The side of the valve housing is also provided with a fluid outlet connected to the flow channel; the hand wheel is connected to a second valve core, the second valve core is arranged in the flow channel and connected to the valve stem; In the closed position, the second valve core closes or opens the fluid outlet; In the open position, the second valve core opens the fluid outlet.

6. The self-closing valve according to claim 5, characterized in that: The second valve core is threadedly connected to the inner wall of the flow channel.

7. The self-closing valve according to claim 5, characterized in that: The valve housing is also provided with an external pipe, and the external pipe is communicated with the fluid outlet.

8. The self-closing valve according to claim 5, characterized in that: A second guide cover is provided in the flow channel, the second guide cover is located between the inner sleeve and the fluid outlet, the first valve core is located between the first guide cover and the second guide cover, and the second guide cover is provided with a flow hole connected to the flow channel, the second guide cover is provided with a second guide hole, and the valve stem is inserted into the second guide hole.

9. The self-closing valve according to claim 8, characterized in that: A second guide sleeve is provided on a side of the second guide cover facing the inner sleeve. The second guide sleeve is connected to the second guide hole, and the valve stem is inserted into the second guide sleeve.

10. The self-closing valve according to any one of claims 1 to 9, characterized in that: An outer wall of the first valve core is provided with an accommodating groove along the circumferential direction, and a sealing ring is provided in the accommodating groove.

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