Overflow cut-off gas cylinder valve with reset function and gas cylinder device

Abstract

According to the overflowing cut-off gas cylinder valve with the reset function, the reset mechanism is arranged on the sealing piece or the opening and closing assembly, in the process of closing the opening and closing assembly, the opening and closing assembly is close to the sealing piece, the reset mechanism can push away the sealing piece in sealing contact with the necking part, and then the sealing piece of the overflowing cut-off mechanism is reset. According to the reset mode provided by the overflowing cut-off gas cylinder valve, the requirement that the gas cylinder valve still resets and continues to be used after being cut off through the overflowing cut-off mechanism due to the too large flow can be met, meanwhile, the number of cylinder valve connectors is not increased, the leakage risk of the cylinder valve is not increased, and rapid and safe reset of the overflowing cut-off mechanism is achieved. The utility model further provides a gas cylinder device which comprises the overflowing cut-off gas cylinder valve with the reset function.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cylinder valves, and particularly relates to an over-current cut-off gas cylinder valve with a reset function and a gas cylinder device. Background Art

[0002] The gas cylinder valve is a valve installed on the gas cylinder to control the on-off and flow of gas, also known as a cylinder valve. At present, the liquefied petroleum gas cylinder valve products on the market do not have the over-current cut-off function. When the pressure regulator, hose, stove, etc. connected to the liquefied petroleum gas cylinder valve leaks and causes the gas cylinder valve to flow too much, it cannot be automatically cut off, and the liquefied gas will continue to leak, thus posing a safety risk.

[0003] In view of the above defects, some patents have proposed over-current cut-off bottle valves, but the reset method of the over-current cut-off mechanism of the bottle valve is mostly to connect an external reset device on the basis of the existing valve body. In order to meet the reset requirements, the newly added reset device adopts a dynamic seal method for sealing, which increases the possibility of leakage of the gas cylinder valve itself.

[0004] Therefore, how to achieve rapid and safe resetting of the overcurrent cut-off mechanism of the gas cylinder valve without increasing the gas cylinder valve interface and the risk of leakage of the gas cylinder valve itself is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] The utility model aims to provide an over-current cut-off gas cylinder valve and a gas cylinder device with a reset function, which can realize the rapid and safe reset of the over-current cut-off mechanism without increasing the gas cylinder valve interface and the risk of leakage of the gas cylinder valve itself.

[0006] In order to solve the above technical problems, the utility model provides an over-current cut-off gas cylinder valve with a reset function, comprising: a valve body, an over-current cut-off mechanism and an opening and closing assembly;

[0007] The valve body is provided with an air inlet port and an air outlet port, the interior of the valve body is connected between the air inlet port and the air outlet port through an air flow channel, the air inlet port is used to communicate with a gas cylinder, and the air outlet port is used to communicate with a gas supply device or a gas use device;

[0008] The over-current cut-off mechanism includes a constricted portion provided on the inner wall of the airflow channel and a sealing member movably provided between the constricted portion and the air inlet port. When a gas-using device leaks and causes an excessive flow rate in the airflow channel (i.e., over-current), the sealing member seals and contacts the constricted portion to block the airflow channel.

[0009] The opening and closing assembly is arranged in the air flow channel, on a side of the constricted portion away from the sealing member, and is used to open or close the air flow channel;

[0010] It also includes a reset mechanism, which is arranged on the sealing member or the opening and closing assembly. During the process of closing the opening and closing assembly, the opening and closing assembly approaches the sealing member, and the reset mechanism can push away the sealing member that is in sealing contact with the necking portion.

[0011] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with a reset function, it also includes a handle, and a handle mounting port is also provided on the valve body, and the handle mounting port is connected to the airflow channel, one end of the handle is exposed to the outside of the valve body, and the other end passes through the handle mounting port to be connected to the opening and closing component, and a sealing component is provided between the inner wall of the handle mounting port and the handle.

[0012] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with a reset function, the opening and closing assembly is closed by rotating the handle. During the process of closing the opening and closing assembly, the opening and closing assembly pushes the over-current cut-off mechanism away, thereby resetting the over-current cut-off mechanism in the closed state.

[0013] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with reset function, the reset mechanism is a rod-shaped structure.

[0014] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with a reset function, the reset mechanism and the sealing component, or the reset mechanism and the opening and closing component, adopt a detachable connection or an integrally formed structure.

[0015] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with reset function, the necked portion and the valve body are detachably connected or integrally formed.

[0016] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with reset function, the sealing member is a sealing ball, and the contact end between the neck portion and the sealing member is a conical surface.

[0017] Optionally, in the above-mentioned over-current cut-off gas cylinder valve with a reset function, a thread is provided on the outer side of the air inlet port of the valve body, and the over-current cut-off gas cylinder valve is connected to the gas cylinder through threads.

[0018] The utility model also provides a gas cylinder device, comprising: a gas cylinder and the over-current cut-off gas cylinder valve with a reset function as described above, wherein the gas inlet of the over-current cut-off gas cylinder valve with a reset function is connected to the gas cylinder.

[0019] Optionally, in the above-mentioned gas cylinder device, the gas cylinder is a liquefied petroleum gas cylinder, a hydrogen cylinder, an oxygen cylinder, a nitrogen cylinder or a carbon dioxide cylinder, etc.

[0020] The utility model provides an over-current cut-off gas cylinder valve with a reset function, and its beneficial effects are:

[0021] By setting a reset mechanism on the seal or the opening and closing assembly, the opening and closing assembly and the seal are brought close together during the process of closing the opening and closing assembly, and the reset mechanism can push away the seal in sealing contact with the necking portion, thereby resetting the seal of the overcurrent cut-off mechanism. The reset method provided by the overcurrent cut-off gas cylinder valve in this case can meet the need for the gas cylinder valve to be reset and continued to be used after being cut off by the overcurrent cut-off mechanism due to excessive flow, and at the same time, it can achieve rapid and safe reset of the overcurrent cut-off mechanism without increasing the valve interface and the risk of leakage of the valve itself.

[0022] The utility model also provides a gas cylinder device, including the above-mentioned over-current cut-off gas cylinder valve with a reset function, which has the same beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of an over-current cut-off gas cylinder valve with a reset function provided in Embodiment 1 of the utility model;

[0025] Figure 2 A schematic diagram of the structure of the valve body provided in the first embodiment of the utility model;

[0026] Figure 3 A partial enlarged view of the cooperation between the opening and closing assembly, the overcurrent cut-off mechanism and the reset mechanism provided in the first embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the structure of an over-current cut-off gas cylinder valve with a reset function provided in the second embodiment of the utility model;

[0028] Figure 5 This is a partial enlarged view of the cooperation between the opening and closing assembly, the overcurrent cut-off mechanism and the reset mechanism provided in the second embodiment of the utility model.

[0029] In the above picture:

[0030] 1-valve body; 101-air inlet port; 102-air outlet port; 103-handle installation port;

[0031] 2-Handle;

[0032] 3-Opening and closing components;

[0033] 4-overcurrent cut-off mechanism; 401-narrowing portion; 402-sealing member;

[0034] 5-Reset mechanism. DETAILED DESCRIPTION

[0035] The embodiments of the present invention 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The core of the utility model is to provide an over-current cut-off gas cylinder valve and a gas cylinder device with a reset function, which can realize the rapid and safe reset of the over-current cut-off mechanism without increasing the gas cylinder valve interface and the risk of leakage of the gas cylinder valve itself.

[0037] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Specifically, please refer to Figure 1-Figure 5 The utility model provides an over-current cut-off gas cylinder valve with a reset function, comprising: a valve body 1, an over-current cut-off mechanism 4, an opening and closing component 3 and a reset mechanism 5.

[0039] Among them, the valve body 1 is provided with an air inlet port 101 and an air outlet port 102, and the interior of the valve body 1 is connected through an air flow channel between the air inlet port 101 and the air outlet port 102. The air inlet port 101 is used to connect with the gas cylinder, and the air outlet port 102 is used to connect with the gas supply equipment or gas using equipment.

[0040] The over-current cut-off mechanism 4 comprises a constricted portion 401 disposed on the inner wall of the airflow channel and a seal 402 movably disposed between the constricted portion 401 and the air inlet port 101. When the air-using equipment leaks and the airflow channel flow is too large, the seal 402 seals and contacts the constricted portion 401 to block the airflow channel.

[0041] The opening and closing component 3 is arranged in the air flow channel, at a side of the constricted portion 401 away from the sealing member 402, and is used to open or close the air flow channel.

[0042] It should be noted that the diameter of the airflow channel at the position of the necking portion 401 is reduced, thereby dividing the airflow channel from the necking portion 401 into one side and the other side of the necking portion 401, and the seal 402 is located on one side of the necking portion 401. When the gas-using equipment is in normal use, the flow rate in the airflow channel is normal, and the seal 402 is separated from the port on one side of the necking portion 401. At this time, the airflow channel is open. When the gas-using equipment leaks and causes the flow rate in the airflow channel to be too large, the flow rate in the airflow channel increases, and the airflow pushes the seal 402 to fit with the port on one side of the necking portion 401. At this time, the airflow channel is closed; the opening and closing component 3 is located on the other side of the necking portion 401, and can be fitted with the port on the other side of the necking portion 401 through artificial control to close the airflow channel, and can be separated from the port on the other side of the necking portion 401 through artificial control to open the airflow channel.

[0043] The reset mechanism 5 is disposed on the seal 402 or the opening and closing assembly 3 . When the opening and closing assembly 3 is closed, the opening and closing assembly 3 and the seal 402 are close to each other, and the reset mechanism 5 can push away the seal 402 in sealing contact with the necking portion 401 .

[0044] The utility model provides an over-current cut-off gas cylinder valve with a reset function, wherein a reset mechanism 5 is arranged on a sealing member 402 or an opening and closing component 3. During the process of closing the opening and closing component 3, the opening and closing component 3 and the sealing member 402 are brought close to each other, and the reset mechanism 5 can push away the sealing member 402 in sealing contact with the constricted portion 401, thereby resetting the sealing member 402 of the over-current cut-off mechanism 4.

[0045] The reset method provided by the overcurrent cut-off gas cylinder valve in this case can meet the need for the gas cylinder valve to be reset and continued to be used after being cut off by the overcurrent cut-off mechanism 4 due to excessive flow. At the same time, it can also achieve fast and safe reset of the overcurrent cut-off mechanism 4 without increasing the bottle valve interface and the risk of leakage of the bottle valve itself.

[0046] Furthermore, the driving mode of the opening and closing component 3 can be electric drive or manual drive, and the specific selection can be adaptively made according to actual conditions.

[0047] When the opening and closing assembly 3 is manually driven, the present solution further includes a handle 2, and a handle installation opening 103 is further provided on the valve body 1, the handle installation opening 103 is communicated with the air flow channel, one end of the handle 2 is exposed outside the valve body 1, and the other end passes through the handle installation opening 103 and is connected to the opening and closing assembly 3. A sealing assembly is provided between the inner wall of the handle installation opening 103 and the handle 2 to prevent gas from leaking from the gap between the handle installation opening 103 and the handle 2.

[0048] The handle 2 can drive the opening and closing component 3 to reciprocate along the air flow channel, so as to achieve the approach and distance between the opening and closing component 3 and the port on the other side of the necked portion 401 .

[0049] The connection between the handle 2 and the handle mounting opening 103 can be a threaded connection or a sliding connection. When a threaded connection is adopted, an internal thread is provided on the inner wall of the handle mounting opening 103, and an external thread matching the internal thread is provided on the handle 2. The over-current cut-off gas cylinder valve is opened and closed mainly by rotating the handle 2, driving the opening and closing assembly 3 to move up and down, thereby realizing the opening and closing of the over-current cut-off gas cylinder valve.

[0050] When in use, the over-current cut-off gas cylinder valve is opened or closed by rotating the handle 2. When the gas cylinder is in normal use, the handle 2 is twisted and unscrewed, the opening and closing component 3 is separated from the other side port of the constricted portion 401, the sealing member 402 is separated from the one side port of the constricted portion 401, and the airflow passes through the airflow channel normally. When a gas-using device leaks, the airflow channel is in an over-current state, and the gas in the gas cylinder pushes the sealing member 402 to seal and fit with the one side port of the constricted portion 401, and the airflow in the airflow channel is in a cut-off state.

[0051] After the leakage problem is found and solved, rotate and tighten the handle 2, the opening and closing component 3 and the sealing member 402 are close to each other (at this time, the opening and closing component 3 and the other side port of the necked portion 401 are not completely fitted together), and the reset mechanism 5 can push away the sealing member 402 in sealing contact with the necked portion 401, thereby restoring the overcurrent cut-off gas cylinder valve to normal use. The overcurrent cut-off mechanism can be reset by rotating the handle 2 to close the valve.

[0052] In order to facilitate the reset operation of the reset mechanism 5 , the reset mechanism 5 can be designed as a rod-shaped structure, a needle-shaped structure or other structural shapes that are compatible with the necking portion 401 .

[0053] Preferably, the sealing member 402, the opening and closing assembly 3, the reset mechanism 5 and the necking portion 401 are coaxially arranged. Figure 1 As shown, the air inlet port 101 of the valve body 1 is located at the bottom, the handle mounting port 103 is located at the top, the axes of the air inlet port 101 and the handle mounting port 103 coincide, the air outlet port 102 is located on the side of the valve body 1, and the axis of the air outlet port 102 is perpendicular to the axis of the air inlet port 101 / handle mounting port 103.

[0054] The seal 402, the opening and closing assembly 3, the reset mechanism 5 and the constricted portion 401 are coaxial with the air inlet port 101 / handle mounting port 103. Accordingly, the air flow channel turns at a position perpendicular to the axis of the air inlet port 101 and the air outlet port 102, and the constricted portion 401 is arranged at a lower position at the vertical position.

[0055] In a specific embodiment, the reset mechanism 5 and the sealing member 402, or the reset mechanism 5 and the opening and closing assembly 3, are detachably connected or integrally formed.

[0056] The detachable connection method includes but is not limited to plug-in, clip-on or threaded connection, and can be selected according to actual conditions. The one-piece structure can be machined, die-casted, welded, etc.

[0057] Similarly, the necking portion 401 and the valve body 1 are detachably connected or integrally formed. The necking portion 401 can be directly machined or cast by the valve body 1, or a prefabricated part can be used to machine the necking portion 401 or a similar structure, and it is arranged in the air flow channel of the valve body 1 by plugging, clamping or threading.

[0058] In a specific embodiment, the sealing member 402 is a sealing ball, and the contact end between the necking portion 401 and the sealing member 402 is a conical surface. Of course, the sealing member 402 can also be a valve core of other shapes, as long as the surface of the port on one side where the necking portion 401 contacts the sealing member 402 can be sealed and fitted.

[0059] In a specific embodiment, the air inlet port 101 of the valve body 1 is provided with threads on the outside, and the air inlet port 101 of the over-current cut-off gas cylinder valve is connected to the gas cylinder through threads. For example, the air inlet port 101 is provided with external threads, and the gas cylinder is provided with internal threads matching the external threads.

[0060] Example of implementation method

[0061] The present invention will be further described with reference to the following examples, which are only used to explain the present invention and are not to be construed as limiting the present invention.

[0062] Embodiment 1:

[0063] like Figure 1-Figure 3 As shown, the utility model provides an over-current cut-off gas cylinder valve with a reset function, the reset mechanism 5 is a thimble, the thimble is arranged on the opening and closing component 3, by rotating the handle 2, the opening and closing component 3 is driven to move up and down, and the thimble moves up and down accordingly. When the over-current cut-off mechanism 4 needs to be reset, the opening and closing component 3 is closed by the handle 2, the thimble moves down, the thimble pushes the sealing member 402 of the over-current cut-off mechanism 4, and the over-current cut-off mechanism 4 is reset. The over-current cut-off mechanism 4 is a sealing ball.

[0064] Embodiment 2:

[0065] like Figure 4-Figure 5As shown, the utility model provides an over-current cut-off gas cylinder valve with a reset function, and the reset mechanism 5 is a push rod, which is arranged on the sealing member 402, and drives the opening and closing assembly 3 to move up and down by rotating the handle 2. After the over-current cut-off mechanism 4 is cut off, the push rod on the sealing member 402 extends to the bottom of the opening and closing assembly 3. When the over-current cut-off mechanism 4 needs to be reset, the opening and closing assembly 3 is closed by the handle 2, the opening and closing assembly 3 moves downward, and the opening and closing assembly 3 pushes the push rod on the sealing member 402, and the over-current cut-off mechanism 4 is reset.

[0066] In summary, the utility model provides an over-current cut-off gas cylinder valve with a reset function, which has the following beneficial effects:

[0067] 1. Closing the valve (i.e. the over-current cut-off gas cylinder valve) can reset the over-current cut-off mechanism 4.

[0068] 2. The reset action (i.e. closing the valve and resetting it) uses the original structure of the gas cylinder valve and does not add a new interface to bring new leakage risks, thereby ensuring the safety of the gas cylinder valve itself.

[0069] In addition, the utility model also provides a gas cylinder device, comprising: a gas cylinder and the over-current cut-off gas cylinder valve with a reset function as described above, wherein the gas inlet of the over-current cut-off gas cylinder valve with a reset function is connected to the gas cylinder.

[0070] Obviously, the gas cylinder device includes the above-mentioned over-current cut-off gas cylinder valve with reset function, which has the same beneficial effects and will not be described in detail here.

[0071] The gas cylinder can be a liquefied petroleum gas cylinder, a hydrogen cylinder, an oxygen cylinder, a nitrogen cylinder or a carbon dioxide cylinder, etc., depending on the required gas medium.

[0072] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 present application.

[0073] In the description of this application, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0074] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0075] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0076] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0077] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0078] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An over-current cut-off gas cylinder valve with a reset function, characterized in that: include: Valve body, over-current cut-off mechanism and opening and closing components; The valve body is provided with an air inlet port and an air outlet port, the interior of the valve body is connected between the air inlet port and the air outlet port through an air flow channel, the air inlet port is used to communicate with a gas cylinder, and the air outlet port is used to communicate with a gas supply device or a gas use device; The over-current cut-off mechanism includes a constricted portion provided on the inner wall of the airflow channel and a sealing member movably provided between the constricted portion and the air inlet port. When a gas-using device leaks and causes an excessive flow in the airflow channel, the sealing member seals and contacts the constricted portion to block the airflow channel. The opening and closing assembly is arranged in the air flow channel, on a side of the constricted portion away from the sealing member, and is used to open or close the air flow channel; It also includes a reset mechanism, which is arranged on the sealing member or the opening and closing assembly. During the process of closing the opening and closing assembly, the opening and closing assembly approaches the sealing member, and the reset mechanism can push away the sealing member that is in sealing contact with the necking portion.

2. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: It also includes a handle, and the valve body is also provided with a handle mounting port, the handle mounting port is connected to the air flow channel, one end of the handle is exposed outside the valve body, and the other end passes through the handle mounting port and is connected to the opening and closing component, and a sealing component is provided between the inner wall of the handle mounting port and the handle.

3. The over-current cut-off gas cylinder valve with reset function according to claim 2, characterized in that: The opening and closing assembly is closed by rotating the handle. During the process of closing the opening and closing assembly, the opening and closing assembly pushes the overcurrent cut-off mechanism away, thereby resetting the overcurrent cut-off mechanism in the closed state.

4. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: The reset mechanism is a rod-shaped structure.

5. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: The reset mechanism and the sealing member, or the reset mechanism and the opening and closing assembly, are detachably connected or integrally formed.

6. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: The necking portion and the valve body are detachably connected or integrally formed.

7. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: The sealing member is a sealing ball, and the contact end between the neck portion and the sealing member is a conical surface.

8. The over-current cut-off gas cylinder valve with reset function according to claim 1, characterized in that: The air inlet port of the valve body is provided with threads on the outside, and the over-flow cut-off gas cylinder valve is connected to the gas cylinder through threads.

9. A gas cylinder device, characterized in that: include: A gas cylinder and an over-current cut-off gas cylinder valve with a reset function as claimed in any one of claims 1 to 8, wherein the gas inlet of the over-current cut-off gas cylinder valve with a reset function is connected to the gas cylinder.

10. The gas cylinder device according to claim 9, characterized in that: The gas cylinder is a liquefied petroleum gas cylinder, a hydrogen cylinder, an oxygen cylinder, a nitrogen cylinder or a carbon dioxide cylinder.

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