Overflow self-closing valve

Abstract

The utility model relates to the technical field of valves, and provides an overflowing self-closing valve which comprises a first valve body, an overflowing protection assembly and a driving assembly, and the first valve body is provided with a fluid outlet; the overflowing protection assembly comprises a shell and a sealing part, the shell is connected to the end, away from the fluid outlet, of the first valve body, a fluid inlet is formed in the end, away from the fluid outlet, of the shell, and a sealing opening opposite to the fluid inlet is formed in the shell; the sealing part is arranged in the shell, can reciprocate in the axial direction between the fluid inlet and the sealing opening and is used for opening or closing the sealing opening; the driving assembly comprises a driving rod capable of reciprocating in the first valve body in the axial direction, and the driving rod is arranged in the shell in a penetrating mode and used for driving the sealing component to reset from the closed sealing opening to the opened sealing opening. According to the invention, overcurrent protection can be realized, and the use safety of liquefied gas is effectively improved.

Description

Technical Field

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

[0002] Liquefied gas cylinders are mainly used to store liquefied gas, and are connected to gas appliances such as gas stoves through liquefied gas pipelines. In actual use, when liquefied gas pipelines are detached or damaged, a large amount of liquefied gas in the liquefied gas cylinder will leak, posing a high safety risk. Utility Model Content

[0003] The purpose of the embodiment of the present application is to provide an overflow self-closing valve, which is intended to improve the safety of liquefied gas during use and prevent large-scale leakage of liquefied gas due to abnormalities in the liquefied gas pipeline (such as falling off or damage).

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] The present application provides an over-flow self-closing valve, comprising:

[0006] A first valve body is provided with a fluid outlet;

[0007] An overcurrent protection assembly, comprising a housing and a sealing component, wherein the housing is connected to one end of the first valve body away from the fluid outlet, the one end of the housing away from the fluid outlet is provided with a fluid inlet, and a sealing port relative to the fluid inlet is formed in the housing; the sealing component is arranged in the housing and can reciprocate axially between the fluid inlet and the sealing port to open or close the sealing port;

[0008] The driving assembly includes a driving rod capable of axially reciprocating movement in the first valve body, and the driving rod is disposed in the housing and is used to drive the sealing component to reset from closing the sealing port to opening the sealing port.

[0009] Optionally, the overcurrent protection component further includes:

[0010] A counterweight lever is rotatably disposed in the housing, the counterweight lever having a pushing end and a counterweight end, the pushing end is disposed in the housing, and the counterweight end extends to the outside of the housing toward one side of the fluid inlet;

[0011] The over-current self-closing valve has an upright state and an inverted state. In the upright state, the pushing end of the counterweight lever is away from the sealing component. In the inverted state, the pushing end of the counterweight lever pushes the sealing component under the action of the gravity of the counterweight end to prevent the sealing component from closing the sealing port.

[0012] Optionally, a first sealing ring is provided at the sealing opening, and the sealing component is a sealing ball, and the sealing ball is used to seal or detach from the first sealing ring.

[0013] Optionally, the overcurrent protection component further includes:

[0014] A connecting rod is disposed in the housing and is capable of axially reciprocating between the fluid inlet and the sealing port, the sealing component is disposed on the connecting rod, and the driving rod is used to drive the connecting rod to move;

[0015] The first elastic member is sleeved on the connecting rod and is used to provide a restoring elastic force for the sealing member.

[0016] Optionally, the housing comprises a containing chamber, the containing chamber is arranged on a side of the sealing component, and an end of the containing chamber close to the sealing port is provided with an opening toward the sealing component, and a blocking ball is arranged in the containing chamber;

[0017] The over-flow self-closing valve has an inverted state and an upright state. In the inverted state, the blocking ball flows through the opening to between the sealing component and the sealing port to prevent the sealing component from closing the sealing port; in the upright state, the blocking ball flows through the opening to reset into the accommodating chamber.

[0018] Optionally, a blocking ring extending toward the sealing component is formed on the inner edge of the sealing port, and in the inverted state, the blocking ring is used to block the blocking ball.

[0019] Optionally, the housing is provided with a bottom cover, the bottom cover is provided with the fluid inlet and a first guide sleeve, and one end of the connecting rod is inserted into the first guide sleeve;

[0020] A bracket is provided in the shell, and the bracket is connected to a second guide sleeve arranged opposite to the first guide sleeve. The sealing port is located between the sealing component and the second guide sleeve. The other end of the connecting rod and the driving rod are inserted into the second guide sleeve. The first elastic member is sleeved on the second guide sleeve and is located between the bracket and the sealing component.

[0021] Optionally, the over-current self-closing valve further includes a valve core assembly disposed in the first valve body, and the valve core assembly includes:

[0022] a valve seat, disposed between the housing and the fluid outlet;

[0023] An inner sleeve is arranged on the inner wall of the valve seat, and the driving rod is inserted into the valve seat and the inner sleeve;

[0024] The first valve core is connected to the driving rod and is used for blocking or separating from the inner sleeve.

[0025] Optionally, the driving assembly further includes:

[0026] a hand wheel, rotatably connected to the first valve body and connected to the driving rod, for driving the driving rod to reset the sealing component and drive the first valve core to reciprocate, so that the first valve core switches between a closed position and an open position;

[0027] In the closed position, at least a portion of the first valve core is embedded in the inner sleeve;

[0028] In the open position, the first valve core is separated from the inner sleeve.

[0029] Optionally, the over-current self-closing valve further includes:

[0030] A second valve body is connected to one end of the first valve body adjacent to the fluid outlet, and an external interface is provided in the side of the second valve body; the hand wheel is connected to a second valve core, and the second valve core is provided in the second valve body and connected to the driving rod;

[0031] In the closed position, the second valve core closes or opens the flow path between the fluid outlet and the external interface;

[0032] In the open position, the second valve core opens the flow path between the fluid outlet and the external port.

[0033] The beneficial effect of the over-current self-closing valve provided by the present application is that, compared with the prior art, the present application can achieve over-current protection through an over-current protection component, and can achieve flow resetting through a driving component, thereby effectively improving the safety of liquefied gas use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 One of the structural schematic diagrams of the over-current self-closing valve provided in the embodiment of the present application;

[0036] Figure 2 for Figure 1 A local enlarged view of point A;

[0037] Figure 3One of the structural cross-sectional views of the overflow self-closing valve provided in the embodiment of the present application;

[0038] Figure 4 A schematic diagram of the structure of a counterweight lever provided in an embodiment of the present application;

[0039] Figure 5 The second structural schematic diagram of the over-current self-closing valve provided in the embodiment of the present application;

[0040] Figure 6 The second structural cross-sectional view of the over-current self-closing valve provided in the embodiment of the present application;

[0041] Figure 7 for Figure 6 A partial enlarged view of point B;

[0042] Figure 8 One of the schematic diagrams of the internal structure of the housing provided in the embodiment of the present application;

[0043] Fig. 9 This is a second schematic diagram of the internal structure of the shell provided in an embodiment of the present application.

[0044] Among them, the reference numerals in the figure are:

[0045] 1. First valve body; 101. Overcurrent protection assembly; 102. Driving assembly; 2. Fluid outlet;

[0046] 3. Shell; 4. Sealing component; 5. Fluid inlet; 6. Sealing port; 7. Driving rod;

[0047] 8. Counterweight lever; 9. Pushing end; 10. Counterweight end; 11. Connecting shaft; 12. Rotating hole;

[0048] 13. Pushing part; 14. Limiting wall; 15. First sealing ring; 16. End cover; 17. Guide hole;

[0049] 18. Positioning hole; 19. Through hole; 20. Screw; 21. Connecting rod; 22. First elastic member;

[0050] 23. Accommodation chamber; 24. Opening; 25. Blocking ball; 26. Blocking ring; 27. Guide plate;

[0051] 28. First plate; 29. ​​Second plate; 30. Third plate; 31. Bottom cover;

[0052] 32. first guide sleeve; 33. bracket; 34. second guide sleeve; 35. through hole; 36. valve seat;

[0053] 37. Inner sleeve; 38. First valve core; 39. Second elastic member; 40. Hand wheel; 41. Second valve body;

[0054] 42. External interface; 43. Second valve core; 44. External pipe; 45. Third guide sleeve;

[0055] 46. ​​Second sealing ring. DETAILED DESCRIPTION

[0056] The 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.

[0057] In the description of the embodiments of the present application, it needs to be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] 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.

[0059] 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.

[0060] According to one embodiment of the present application, referring to Figure 1-Figure 9As shown, the present application provides an over-current self-closing valve, which mainly includes: a first valve body 1, an over-current protection component 101 and a drive component 102. Among them, the first valve body 1 is provided with a fluid outlet 2; the over-current protection component 101 includes a shell 3 and a sealing component 4, the shell 3 is connected to one end of the first valve body 1 away from the fluid outlet 2, and the end of the shell 3 away from the fluid outlet 2 is provided with a fluid inlet 5, and a sealing port 6 relative to the fluid inlet 5 is formed in the shell 3, and the sealing port 6 is located between the fluid inlet 5 and the fluid outlet 2; the sealing component 4 is arranged in the shell 3, and can move back and forth axially between the fluid inlet 5 and the sealing port 6, for opening or closing the sealing port 6; the drive component 102 includes a drive rod 7 that can move back and forth axially in the first valve body 1, and the drive rod 7 is penetrated in the shell 3, and is used to drive the sealing component 4 to reset from closing the sealing port 6 to opening the sealing port 6. The axial direction can be understood as the length direction of the drive rod 7.

[0061] The overflow self-closing valve provided in the embodiment of the present application is intended to improve the safety of liquefied gas during use and prevent large-scale leakage of liquefied gas due to abnormalities (such as falling off or damage) in the liquefied gas pipeline. Specifically:

[0062] The first valve body 1 is the basic part of the overflow self-closing valve, and it has a fluid outlet 2. The fluid outlet 2 can be connected to a liquefied gas pipeline for outputting liquefied gas to supply gas to gas-using equipment.

[0063] The housing 3 of the overcurrent protection assembly 101 can be threadedly connected to the end of the first valve body 1 away from the fluid outlet 2, and is designed with a fluid inlet 5, which can be connected to the gas outlet of the liquefied gas cylinder. The existence of the housing 3 provides space for the movement of the sealing component 4, and through its structural design, it is effectively integrated with the first valve body 1.

[0064] The sealing component 4 is located in the housing 3 and can reciprocate along the axial direction to directly control the opening or closing of the internal flow channel. The design of the sealing component 4 is key. Under normal circumstances, it can remain open to allow gas to flow, and respond quickly under abnormal circumstances to move to the sealing port 6 to seal.

[0065] The driving rod 7 of the driving assembly 102 is installed in the first valve body 1, can reciprocate along the axial direction, and pass through the housing 3 to directly act on the sealing component 4. The design of the driving rod 7 allows for easy and effective operation to restore gas circulation when the overcurrent protection mechanism needs to be manually reset.

[0066] Normal working state: During the use of liquefied gas, the sealing component 4 is in the open state, allowing the liquefied gas to flow from the fluid inlet 5 through the inside of the shell 3, into the first valve body 1 through the sealing port 6, and finally output from the fluid outlet 2 to the liquefied gas pipeline to supply gas stoves and other gas-using equipment. At this time, the entire over-current self-closing valve maintains a normal gas flow state.

[0067] Overcurrent protection triggering: Once abnormal flow is detected (such as a sudden increase in airflow due to pipe detachment or damage), the sealing component 4 is pushed and moved along the airflow direction under the impact force of the airflow until it tightly seals the sealing port 6, effectively preventing further leakage of liquefied gas and realizing immediate overcurrent protection function.

[0068] Reset operation: After the over-current phenomenon is handled, in order to restore normal gas supply, the sealing component 4 can be pushed by the driving rod 7 to reset it back to the open state and reopen the flow path of liquefied gas. This design ensures that users can quickly and safely resume operation after eliminating external faults.

[0069] Therefore, the overflow self-closing valve provided in the embodiment of the present application realizes precise control of the flow of liquefied gas and automatic protection under abnormal conditions through sophisticated structural design and reasonable mechanical application, thereby significantly improving the safety of liquefied gas use.

[0070] According to one embodiment of the present application, referring to Figure 1-Figure 4 As shown, the overcurrent protection component 101 of this embodiment also includes: a counterweight lever 8, which is rotatably disposed in the shell 3, and the counterweight lever 8 has a pushing end 9 and a counterweight end 10, the pushing end 9 is disposed in the shell 3, and the counterweight end 10 extends to the side of the fluid inlet 5 to the outside of the shell 3.

[0071] The over-current self-closing valve has an upright state and an inverted state. In the upright state, the pushing end 9 of the counterweight lever 8 is away from the sealing component 4. In the inverted state, the pushing end 9 of the counterweight lever 8 pushes the sealing component 4 under the action of the gravity of the counterweight end 10 to prevent the sealing component 4 from closing the sealing port 6.

[0072] Specifically, a connecting shaft 11 is provided in the housing 3 , and a rotating hole 12 is provided in the counterweight lever 8 . The rotating hole 12 is rotatably connected to the connecting shaft 11 , thereby realizing the rotation of the counterweight lever 8 .

[0073] The push end 9 of the counterweight lever 8 is designed to have a push portion 13 protruding toward the sealing component 4. This design enables the counterweight lever 8 to effectively act on the sealing component 4 when rotating to generate a directional thrust. The shape and size of the push portion 13 can be designed according to actual needs to ensure that the sealing component 4 can be effectively pushed.

[0074] The counterweight end 10 of the counterweight lever 8 is inclined in a direction away from the sealing component 4, so that the counterweight end 10 is facing away from the pushing end 9, and the pushing portion 13 and the counterweight end 10 are located on opposite sides of the rotating hole 12; and the weight of the counterweight end 10 is greater than the weight of the pushing end 9, and the maximum distance a from the center of the rotating hole 12 to the counterweight end 10 is greater than or equal to the maximum distance b from the center of the rotating hole 12 to the pushing end 9; or, the weight of the counterweight end 10 is equal to the weight of the pushing end 9, and the maximum distance a from the center of the rotating hole 12 to the counterweight end 10 is greater than the maximum distance b from the center of the rotating hole 12 to the pushing end 9, so that the counterweight lever 8 can rotate by itself when in an inverted state.

[0075] In addition, a limiting wall 14 is provided near the sealing port 6 in the shell 3. When in the upright state, the counterweight lever 8 does not work, and the pushing end 9 of the counterweight lever 8 stably rests against the limiting wall 14. At this time, the pushing end 9 of the counterweight lever 8 is separated from the sealing component 4. During normal operation, the sealing component 4 is away from the sealing port 6 and is in a flow-through state. When flow is excessive, the sealing component 4 blocks the sealing port 6 and is in a flow-cutting state.

[0076] When it is necessary to pour out the residual liquefied gas in the liquefied gas cylinder or when overcurrent protection is not required, the entire valve is inverted. When inverted, the sealing component 4 will move to the sealing port 6 for sealing. At this time, the counterweight lever 8 takes effect. The counterweight lever 8 rotates automatically under the action of the gravity of the counterweight end 10. The pushing end 9 of the counterweight lever 8 is separated from the limiting wall 14 of the shell 3 and moves toward the sealing component 4, preventing the sealing component 4 from sealing the sealing port 6, so that the flow channel is unobstructed without manual operation.

[0077] It can be understood that, in the upright state, the overcurrent protection component 101 is at the bottom of the first valve body 1, such as Figure 3 As shown; on the contrary, the inversion is Figure 3 The entire valve is shown reversed 180°.

[0078] Therefore, the embodiment of the present application cleverly utilizes the counterweight lever 8 to not only achieve control of overcurrent protection under normal conditions, but also automatically adapts and keeps the sealing port 6 unobstructed during specific operations such as pouring out the residual gas in the liquefied gas cylinder, thereby reducing the need for manual intervention and improving convenience and safety of use.

[0079] According to one embodiment of the present application, referring to Figure 3 As shown, a first sealing ring 15 is provided at the sealing opening 6 , and the sealing component 4 is a sealing ball, which is used to block or separate from the first sealing ring 15 .

[0080] Specifically, in the upright state, during normal ventilation, the sealing ball is away from the first sealing ring 15, and the fluid inlet 5 is connected to the sealing port 6; when the flow is flowing, under the impact of the airflow, the sealing ball is pushed along the airflow direction to move to the first sealing ring 15 for sealing. When the sealing ball is close to the first sealing ring 15, a closed interface can be formed to effectively prevent the leakage of liquefied gas. This design can quickly and completely block the sealing port 6 when the flow is flowing, and maintain good sealing performance.

[0081] According to one embodiment of the present application, referring to Figure 2 As shown, an end cover 16 is provided at the bottom of the housing 3 , and the end cover 16 is provided with a fluid inlet 5 and a guide hole 17 , and a portion of the counterweight lever 8 extends to the outside of the housing 3 through the guide hole 17 .

[0082] Specifically, the guide hole 17 is used to limit the rotation of the counterweight lever 8 to avoid possible deviation or shaking of the counterweight lever 8 during rotation, thereby ensuring that the pushing end 9 of the counterweight lever 8 can accurately and stably act on the sealing ball.

[0083] According to one embodiment of the present application, referring to Figure 2 As shown, the fluid inlet 5 includes: a positioning hole 18 and a flow hole 19. The positioning hole 18 is used to position the sealing ball; the flow hole 19 is connected to the positioning hole 18 and is used for flow.

[0084] For example, when the entire valve is upright and working normally, the sealing ball can be located in the positioning hole 18, and the liquefied gas in the liquefied gas cylinder can enter the housing 3 through the flow hole 19 beside the positioning hole 18.

[0085] Furthermore, the guide hole 17 is connected to the positioning hole 18, that is, the guide hole 17 is connected to the fluid inlet 5. In this example, the overall structure of the guide hole 17 and the fluid inlet 5 is roughly T-shaped.

[0086] In addition, the housing 3 is connected to the end cover 16 by screws 20 to achieve detachable assembly.

[0087] According to one embodiment of the present application, referring to Figure 7 As shown, the overcurrent protection assembly 101 of this embodiment further includes: a connecting rod 21 and a first elastic member 22, the connecting rod 21 is arranged in the housing 3, and can reciprocate axially between the fluid inlet 5 and the sealing port 6, the sealing component 4 is arranged on the connecting rod 21, and the driving rod 7 is used to drive the connecting rod 21 to move; the first elastic member 22 is sleeved on the connecting rod 21, and is used to provide a reset elastic force for the sealing component 4. In this example, the sealing component 4 can be a sealing pad, and the first elastic member 22 can be a spring.

[0088] Specifically, the first elastic member 22 provides a restoring elastic force for the sealing member 4 to ensure that the sealing member 4 remains in an open state when there is no over-current, and cooperates with the driving rod 7 to quickly reset the sealing member 4 after the over-current phenomenon ends.

[0089] According to one embodiment of the present application, referring to Figure 7-Figure 9 As shown, the housing 3 includes a receiving chamber 23 , which is disposed on the side of the sealing component 4 , and an end of the receiving chamber 23 close to the sealing port 6 is provided with an opening 24 toward the sealing component 4 , and a blocking ball 25 is provided in the receiving chamber 23 .

[0090] It can be understood that the shell 3 includes an installation space for accommodating structures such as the sealing component 4, the connecting rod 21 and the first elastic member 22, and a accommodating chamber 23 for accommodating the blocking ball 25. The accommodating chamber 23 is arranged on the side of the installation space and is connected to the installation space through the opening 24.

[0091] The specific type of the blocking ball 25 of the present application is not particularly limited, and it can be, for example, a spherical component such as a steel ball.

[0092] The overflow self-closing valve has an inverted state and an upright state. In the inverted state, the blocking ball 25 flows through the opening 24 to between the sealing component 4 and the sealing port 6 to prevent the sealing component 4 from closing the sealing port 6; in the upright state, the blocking ball 25 flows through the opening 24 to reset to the accommodating chamber 23.

[0093] It can be understood that, in the upright state, the overcurrent protection component 101 is at the bottom of the first valve body 1, such as Figure 6 As shown; on the contrary, the inversion is Figure 6 The entire valve is shown reversed 180°.

[0094] Specifically, when the use of the liquefied gas cylinder is nearing the end and the residual liquefied gas in the bottle needs to be extracted, the suction equipment is connected to the fluid outlet 2. The negative pressure generated by the suction may cause the sealing component 4 to move to the sealing port 6 for sealing, affecting the extraction efficiency.

[0095] Therefore, when residual gas extraction is required, that is, residual gas in the gas cylinder is extracted, or when the overcurrent protection function is not required in other cases, the entire valve can be turned upside down, and the blocking ball 25 automatically moves to between the sealing component 4 and the sealing port 6 under the action of gravity to form a physical barrier. This effectively prevents the sealing component 4 from closing, thereby ensuring that the liquefied gas can be discharged smoothly to meet the residual gas extraction needs.

[0096] When the over-current self-closing valve returns to the upright state, the blocking ball 25 naturally slides back into the accommodation chamber 23 under the action of gravity, and no longer interferes with the normal operation of the sealing component 4. At this time, if the abnormal airflow increases, the sealing component 4 can quickly move to the sealing port 6 under the action of the airflow pressure to block the gas leakage, restore the over-current protection function, and ensure the safety of use.

[0097] Therefore, the embodiment of the present application introduces the blocking ball 25 and its corresponding accommodating chamber 23 structure, so that the over-current self-closing valve can adapt to different usage scenarios, and especially adds the ability to temporarily disable the over-current protection function in specific circumstances (such as residual extraction operations) without affecting its normal safety protection mechanism.

[0098] According to one embodiment of the present application, referring to Figure 7 and Fig. 9 As shown, a blocking ring 26 extending toward the sealing component 4 is formed on the inner edge of the sealing opening 6 . In the inverted state, the blocking ring 26 is used to block the blocking ball 25 .

[0099] In this embodiment of the present application, the blocking ring 26 is additionally provided on the inner edge of the sealing opening 6, and its design purpose is to provide a precise limit point for the blocking ball 25 when the valve is inverted. Thus, in the inverted state, when the blocking ball 25 slides onto the sealing component 4 under the action of gravity, it will be blocked by the blocking ring 26 and stay accurately at the position between the sealing component 4 and the sealing opening 6, instead of sliding randomly, thereby ensuring the relative smoothness of the flow channel.

[0100] Through the positioning effect of the blocking ring 26, the blocking ball 25 is restricted to a position that does not affect most of the sealing port 6, reducing the obstruction to the gas flow. This is particularly important for residual extraction operations, because it requires that the gas can flow out smoothly while not activating the overcurrent protection mechanism, thereby improving the residual extraction efficiency.

[0101] According to one embodiment of the present application, referring to Figure 7 As shown, a guide plate 27 is provided at the opening 24 of the accommodating chamber 23 , and the guide plate 27 is used to guide the flow of the blocking ball 25 .

[0102] In this embodiment of the present application, the guide plate 27 is designed to guide the moving path of the blocking ball 25 when switching between the inverted and upright positions. In the inverted state, the guide plate 27 prompts the blocking ball 25 to slide quickly and accurately along the guide path to between the sealing component 4 and the blocking ring 26, ensuring that the switching of the overcurrent protection function is completed in a short time.

[0103] Similarly, when the overcurrent protection function needs to be restored, that is, when it is upright, the guide plate 27 can also ensure that the blocking ball 25 returns quickly and unimpeded to the accommodating chamber 23. This design reduces the delay or jamming that may occur due to the natural fall back due to gravity, thereby improving work efficiency and reliability.

[0104] For example, refer to Figure 7-Figure 9 As shown, a first plate 28 , a second plate 29 and a third plate 30 are disposed in the housing 3 , and a receiving chamber 23 is enclosed between the first plate 28 , the second plate 29 , the third plate 30 and the housing 3 .

[0105] The third plate 30 has an opening 24 on its upper portion facing the sealing component 4 , and a guide plate 27 on its top end. In an upright state, the guide plate 27 is tilted downward, and the top end of the guide plate 27 is higher than the sealing component 4 .

[0106] With such a design, the blocking ball 25 can be stably engaged between the blocking ring 26 and the sealing component 4 in the inverted state. In addition, the specific height difference between the top of the guide plate 27 and the sealing component 4 can be designed according to actual needs to ensure that the blocking ball 25 can automatically flow back to the accommodating chamber 23 when switching from the inverted state to the upright state.

[0107] According to one embodiment of the present application, referring to Figure 7-Figure 9 As shown, the number of the accommodation chambers 23 is at least two, and the accommodation chambers 23 are arranged at intervals along the circumference of the sealing component 4. In this example, the number of the accommodation chambers 23 is three.

[0108] In this embodiment of the present application, each accommodation chamber 23 can accommodate at least one blocking ball 25, and the design of multiple accommodation chambers 23 means that multiple blocking balls 25 can be deployed. When placed upright or inverted, multiple blocking balls 25 work together, which can not only distribute the force more evenly, but also improve the resistance of the over-current self-closing valve to abnormal conditions and enhance the overall mechanical stability.

[0109] A single blocking ball 25 may have problems such as wear and sticking that may affect its function. However, with the design of multiple accommodating chambers 23 and blocking balls 25, even if a problem occurs with an individual blocking ball 25, the other blocking balls 25 can still function normally, thereby greatly improving reliability and reducing the risk of failure due to single point failure.

[0110] In addition, multiple accommodating chambers 23 are arranged at intervals along the circumference of the sealing component 4. When placed upright, these accommodating chambers 23 and the blocking balls 25 therein will not cause significant obstruction to the normal airflow; when placed in an inverted state, the blocking balls 25 are evenly distributed around the sealing port 6, which can open the flow channel more evenly and stably, ensure unobstructed airflow, and at the same time reduce direct obstruction to the sealing port 6, thereby optimizing the control accuracy and efficiency of the airflow.

[0111] According to one embodiment of the present application, referring to Figure 7 and Figure 8As shown, the number of the blocking balls 25 in each accommodation chamber 23 is at least two, and each blocking ball 25 is arranged along the height direction of the housing 3 .

[0112] In this embodiment of the present application, at least two blocking balls 25 are arranged in each accommodating chamber 23. When the overflow self-closing valve is in an inverted state, these blocking balls 25 work together to more firmly block the sealing component 4 from moving toward the sealing port 6. Even if the blocking ball 25 in front fails to fully fall into place for some reason, the subsequent blocking ball 25 can provide additional thrust to make it fall into place, thereby ensuring unimpeded airflow and improving reliability.

[0113] According to one embodiment of the present application, referring to Figure 5 , Figure 7 and Fig. 9 As shown, the shell 3 is provided with a bottom cover 31, the bottom cover 31 is provided with a fluid inlet 5 and a first guide sleeve 32, one end of the connecting rod 21 is inserted into the first guide sleeve 32; and a bracket 33 is provided in the shell 3, the bracket 33 is connected to a second guide sleeve 34 arranged opposite to the first guide sleeve 32, the sealing port 6 is located between the sealing component 4 and the second guide sleeve 34, the other end of the connecting rod 21 and the driving rod 7 are inserted into the second guide sleeve 34, the first elastic member 22 is sleeved on the second guide sleeve 34, and is located between the bracket 33 and the sealing component 4.

[0114] A plurality of brackets 33 may be provided, and the plurality of brackets 33 are arranged around the second guide sleeve 34 at intervals, and a through hole 35 is provided between two adjacent brackets 33 for air flow to pass through.

[0115] It is understandable that in Figure 3 In the over-current self-closing valve shown, a bracket 33 is also provided in the housing 3 of the over-current protection component, the bracket 33 is connected to the second guide sleeve 34, the sealing port 6 is located between the sealing component 4 and the second guide sleeve 34, and the driving rod 7 is inserted into the second guide sleeve 34.

[0116] The present application can guide the movement of the driving rod 7 and the connecting rod 21 through the guide sleeve structure, thereby improving stability and reliability.

[0117] According to one embodiment of the present application, referring to Figure 3 and Figure 6 As shown, the over-current self-closing valve also includes a valve core assembly arranged in the first valve body 1, and the valve core assembly includes: a valve seat 36, an inner sleeve 37 and a first valve core 38. Among them, the valve seat 36 is arranged between the housing 3 and the fluid outlet 2; the inner sleeve 37 is arranged on the inner wall of the valve seat 36, and the inner sleeve 37 is a hollow kit with openings at both ends. The driving rod 7 is inserted into the valve seat 36 and the inner sleeve 37; the first valve core 38 is connected to the driving rod 7 and is used to block or disengage the inner sleeve 37.

[0118] Normal working state: During the use of liquefied gas, the sealing component 4 is in the open state, and the first valve core 38 is separated from the inner sleeve 37, allowing the liquefied gas to pass through the inside of the shell 3 from the fluid inlet 5, flow into the first valve body 1 through the sealing port 6, and flow out from the fluid outlet 2 through the inner sleeve 37. At this time, the entire over-current self-closing valve maintains normal gas flow.

[0119] Overcurrent protection triggering: Once abnormal flow is detected (such as a sudden increase in airflow due to pipe detachment or damage), the sealing component 4 is pushed and moved along the airflow direction under the impact force of the airflow until it tightly seals the sealing port 6, effectively preventing further leakage of liquefied gas and realizing immediate overcurrent protection function.

[0120] Reset operation: After over-current protection occurs, human intervention is required to continue using gas. The driving rod 7 moves downward to push open the sealing component 4, so that it is reset to the open state, and the first valve core 38 moves downward to the inner sleeve 37 for blocking under the action of the driving rod 7. At this time, the entire flow channel is still in a closed state and will not cause gas leakage. After the liquefied gas pipeline and related equipment are inspected and repaired, it can be opened again for normal use.

[0121] According to one embodiment of the present application, referring to Figure 3 and Figure 6 As shown, the valve core assembly further includes: a second elastic member 39, which is sleeved on the driving rod 7 and located between the first valve core 38 and the bracket 33. The second elastic member 39 can be a spring.

[0122] According to one embodiment of the present application, referring to Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the drive assembly 102 also includes: a handwheel 40, which is rotatably connected to the first valve body 1 and is connected to the drive rod 7, and is used to drive the drive rod 7 to reset the sealing component 4 and drive the first valve core 38 to move back and forth, so that the first valve core 38 switches between a closed position and an open position; in the closed position, at least a portion of the first valve core 38 is embedded in the inner sleeve 37; in the open position, the first valve core 38 is separated from the inner sleeve 37.

[0123] It can be understood that, since at least a portion of the first valve core 38 is built into the inner sleeve 37 in the closed position, when it is necessary to switch from the closed position to the open position, the hand wheel 40 needs to be rotated a certain number of times to gradually move the first valve core 38 outward from the inner sleeve 37. This design can prevent the first valve core 38 from immediately opening the flow channel due to a slight rotation of the hand wheel 40, thereby avoiding accidental air leakage.

[0124] For example, when the hand wheel 40 is turned in the opening direction for no more than a preset number of turns (e.g., 0.5 turns), the first valve core 38 is still in the inner sleeve 37, closing the flow channel. Only when the hand wheel 40 is turned for more than the preset number of turns can the first valve core 38 be separated from the inner sleeve 37 to open the flow channel. By setting a specific number of turns as a safety threshold, it is ensured that the first valve core 38 remains in a blocked state, i.e., a closed position, before reaching this rotation range. This design clearly defines the limits of safe operation and reduces the possibility of accidental air leakage.

[0125] The over-current self-closing valve of the present application adopts an opening process with a transitional stage, that is, the first valve core 38 needs to rotate a preset number of circles before it can completely separate from the inner sleeve 37 to achieve the conduction of the flow channel. This design requires the user to consciously and continuously turn the hand wheel 40, rather than just a slight or unintentional touch, thereby greatly reducing the risk of accidental opening of the over-current self-closing valve due to misoperation or external force impact.

[0126] Therefore, the overflow 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.

[0127] According to one embodiment of the present application, referring to Figure 5 and Figure 6 As shown, the over-current self-closing valve also includes: a second valve body 41, the second valve body 41 is connected to one end of the first valve body 1 adjacent to the fluid outlet 2, and an external interface 42 is provided on the side of the second valve body 41; the hand wheel 40 is connected to a second valve core 43, the second valve core 43 is provided in the second valve body 41, and is connected to the driving rod 7; in the closed position, the second valve core 43 closes or opens the flow path between the fluid outlet 2 and the external interface 42; in the open position, the second valve core 43 opens the flow path between the fluid outlet 2 and the external interface 42.

[0128] Specifically, the second valve core 43 can be connected to the driving rod 7 by means of clamping, threaded connection, integral connection or abutment.

[0129] For example, the second valve core 43 is connected to the drive rod 7 by means of clamping, threaded connection or integral connection. When the handwheel 40 rotates, the second valve core 43 can drive the drive rod 7 and the first valve core 38 to rotate synchronously and move back and forth up and down in the corresponding valve body.

[0130] For example, the second valve core 43 abuts against the drive rod 7. When the hand wheel 40 is rotated to close, the second valve core 43 is driven to move downward, thereby squeezing the drive rod 7 and the second elastic member 39 downward, and driving the first valve core 38 to move downward; when the hand wheel 40 is rotated to open, the second valve core 43 is driven to move upward, and the drive rod 7 and the first valve core 38 move upward under the elastic force of the second elastic member 39.

[0131] It can be understood that, in the closed position, if the first valve core 38 is completely embedded in the inner sleeve 37 to block the flow path, the second valve core 43 can simultaneously close the fluid outlet 2 to achieve a double insurance mechanism; if the hand wheel 40 is gradually turned to open, the second valve core 43 can first open the fluid outlet 2, but at this time the first valve core 38 is still in the inner sleeve 37 and has not yet separated from the inner sleeve 37, that is, it is still in the closed position to block the flow path. Such a design can prevent the flow path from being immediately opened due to an accidental slight rotation of the hand wheel 40, thereby avoiding accidental air leakage.

[0132] When in the open position, the second valve core 43 opens the fluid outlet 2, and the first valve core 38 is separated from the inner sleeve 37 to open the flow channel.

[0133] According to an embodiment of the present application, the second valve core 43 is threadedly connected to the inner wall of the second valve body 41. When the hand wheel 40 is turned, the second valve core 43 can be driven to move up and down in the flow channel, thereby controlling the movement of the driving rod 7.

[0134] In this embodiment of the present application, the threaded connection allows the up and down movement distance of the second valve core 43 to be controlled by designing the pitch of the thread, thereby controlling the movement distance of the first valve core 38 and adjusting the position of the first valve core 38. For example, if the thread pitch is 1 mm, the first valve core 38 rises or falls 1 mm for each turn of the hand wheel 40; if the thread pitch is 2 mm, the first valve core 38 rises or falls 2 mm for each turn of the hand wheel 40.

[0135] According to one embodiment of the present application, referring to Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the external interface 42 is connected to an external pipe 44 .

[0136] The embodiment of the present application provides an external pipe 44 so that the overflow self-closing valve can be conveniently connected to the liquefied gas pipeline, thereby simplifying the installation process and reducing the installation cost.

[0137] According to one embodiment of the present application, referring to Figure 3 and Figure 6 As shown, a third guide sleeve 45 is provided at one end of the valve seat 36 close to the fluid outlet 2. The third guide sleeve 45 is located between the first valve core 38 and the fluid outlet 2. The drive rod 7 is inserted into the third guide sleeve 45. The movement of the drive rod 7 is further guided by the third guide sleeve 45 to improve stability.

[0138] In addition, a second sealing ring 46 is provided on the outer peripheral wall of the first valve core 38. When the first valve core 38 is embedded in the inner bushing 37, the second sealing ring 46 is squeezed to form a tight sealing interface, which effectively prevents gas leakage when the over-current self-closing valve is closed. Even in the face of high pressure or slight deformation caused by long-term use, the elasticity of the second sealing ring 46 can ensure a good sealing effect.

[0139] 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. An over-current self-closing valve, characterized in that: include: A first valve body is provided with a fluid outlet; An overcurrent protection assembly, comprising a housing and a sealing component, wherein the housing is connected to one end of the first valve body away from the fluid outlet, the one end of the housing away from the fluid outlet is provided with a fluid inlet, and a sealing port relative to the fluid inlet is formed in the housing; the sealing component is arranged in the housing and can reciprocate axially between the fluid inlet and the sealing port to open or close the sealing port; The driving assembly includes a driving rod capable of axially reciprocating movement in the first valve body, and the driving rod is disposed in the housing and is used to drive the sealing component to reset from closing the sealing port to opening the sealing port.

2. The overflow self-closing valve according to claim 1, characterized in that: The overcurrent protection component also includes: A counterweight lever is rotatably disposed in the housing, the counterweight lever having a pushing end and a counterweight end, the pushing end is disposed in the housing, and the counterweight end extends to the outside of the housing toward one side of the fluid inlet; The over-current self-closing valve has an upright state and an inverted state. In the upright state, the pushing end of the counterweight lever is away from the sealing component. In the inverted state, the pushing end of the counterweight lever pushes the sealing component under the action of the gravity of the counterweight end to prevent the sealing component from closing the sealing port.

3. The overflow self-closing valve according to claim 2, characterized in that: A first sealing ring is provided at the sealing opening, and the sealing component is a sealing ball, which is used to block or separate from the first sealing ring.

4. The overflow self-closing valve according to claim 1, characterized in that: The overcurrent protection component also includes: A connecting rod is disposed in the housing and is capable of axially reciprocating between the fluid inlet and the sealing port, the sealing component is disposed on the connecting rod, and the driving rod is used to drive the connecting rod to move; The first elastic member is sleeved on the connecting rod and is used to provide a restoring elastic force for the sealing member.

5. The overflow self-closing valve according to claim 4, characterized in that: The housing comprises a containing chamber, the containing chamber is arranged on a side of the sealing component, and an end of the containing chamber close to the sealing port is provided with an opening toward the sealing component, and a blocking ball is arranged in the containing chamber; The over-flow self-closing valve has an inverted state and an upright state. In the inverted state, the blocking ball flows through the opening to between the sealing component and the sealing port to prevent the sealing component from closing the sealing port; in the upright state, the blocking ball flows through the opening to reset into the accommodating chamber.

6. The overflow self-closing valve according to claim 5, characterized in that: A blocking ring extending toward the sealing component is formed on the inner edge of the sealing port. In the inverted state, the blocking ring is used to block the blocking ball.

7. The overflow self-closing valve according to claim 4, characterized in that: The housing is provided with a bottom cover, the bottom cover is provided with the fluid inlet and a first guide sleeve, and one end of the connecting rod is inserted into the first guide sleeve; A bracket is provided in the shell, and the bracket is connected to a second guide sleeve arranged opposite to the first guide sleeve. The sealing port is located between the sealing component and the second guide sleeve. The other end of the connecting rod and the driving rod are inserted into the second guide sleeve. The first elastic member is sleeved on the second guide sleeve and is located between the bracket and the sealing component.

8. The overflow self-closing valve according to any one of claims 1 to 7, characterized in that: The over-current self-closing valve further includes a valve core assembly disposed in the first valve body, and the valve core assembly includes: a valve seat, disposed between the housing and the fluid outlet; An inner sleeve is arranged on the inner wall of the valve seat, and the driving rod is inserted into the valve seat and the inner sleeve; The first valve core is connected to the driving rod and is used for blocking or separating from the inner sleeve.

9. The overflow self-closing valve according to claim 8, characterized in that: The drive assembly also includes: a hand wheel, rotatably connected to the first valve body and connected to the driving rod, for driving the driving rod to reset the sealing component and drive the first valve core to reciprocate, 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; In the open position, the first valve core is separated from the inner sleeve.

10. The overflow self-closing valve according to claim 9, characterized in that: The over-current self-closing valve also includes: A second valve body is connected to one end of the first valve body adjacent to the fluid outlet, and an external interface is provided on the side of the second valve body; the hand wheel is connected to a second valve core, and the second valve core is provided in the second valve body and connected to the driving rod; In the closed position, the second valve core closes or opens the flow path between the fluid outlet and the external interface; In the open position, the second valve core opens the flow path between the fluid outlet and the external port.

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