Overcurrent protection device

Abstract

The utility model relates to the technical field of fluid, and provides an overcurrent protection device which comprises a shell, a sealing component and a push rod, and the shell is provided with a flow channel, a fluid inlet and a fluid outlet, the sealing component is movably arranged in the flow channel and has a through-flow state and a cut-off state, the sealing component is separated from the fluid outlet in the through-flow state, and the sealing component blocks the fluid outlet in the cut-off state; the push rod is rotatably arranged in the flow channel, part of the push rod extends out of the flow channel, and the push rod is used for pushing the sealing component so that the sealing component can be reset to the through-flow state from the cut-off state. According to the invention, the over-current protection function and the residual extraction function in the liquefied gas supply process can be realized, a rapid and simple reset mode is provided, and the use safety of liquefied gas is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of fluid technology, and in particular provides an overcurrent protection device. 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 embodiments of the present application is to provide an overcurrent protection device, which aims to solve the problem of large-scale leakage of liquefied gas due to abnormal phenomena such as detachment or breakage of the liquefied gas pipeline, thereby improving the safety of use.

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

[0005] The present application provides an overcurrent protection device, comprising:

[0006] A shell having a flow channel and a fluid inlet and a fluid outlet connected to the flow channel;

[0007] a sealing component movably disposed in the flow channel and having a flow-through state and a flow-blocking state, wherein the sealing component is separated from the fluid outlet in the flow-through state and the sealing component blocks the fluid outlet in the flow-blocking state;

[0008] A push rod is rotatably disposed in the flow channel, and a portion of the push rod extends outside the flow channel. The push rod is used to push the sealing component to reset the sealing component from the flow-blocking state to the flow-through state.

[0009] Optionally, the push rod has an inner end, and a pushing portion protruding toward the sealing component is formed on the inner end of the push rod, and the pushing portion is used to push the sealing component.

[0010] Optionally, a connecting shaft is provided in the flow channel, and the push rod is provided with a rotating hole rotatably connected to the connecting shaft.

[0011] Optionally, the push rod has an outer end, the outer end of the push rod is provided with a counterweight portion, and the counterweight portion faces away from the pushing portion;

[0012] The weight of the counterweight portion is greater than the weight of the pushing portion, and the maximum distance from the center of the rotating hole to the counterweight portion is greater than or equal to the maximum distance from the center of the rotating hole to the pushing portion;

[0013] Alternatively, the weight of the counterweight portion is equal to the weight of the pushing portion, and the maximum distance from the center of the rotating hole to the counterweight portion is greater than the maximum distance from the center of the rotating hole to the pushing portion.

[0014] Optionally, a sealing ring is provided at the fluid outlet, and the sealing component is a sealing ball;

[0015] In the flow-through state, the sealing ball is separated from the sealing ring, and in the flow-blocking state, the sealing ball blocks the sealing ring.

[0016] Optionally, the shell is provided with a bottom cover, the bottom cover is provided with the fluid inlet and the guide hole, and a portion of the push rod extends to the outside of the flow channel through the guide hole.

[0017] Optionally, the fluid inlet comprises:

[0018] A positioning hole, used for positioning the sealing ball;

[0019] The through-flow hole is connected with the positioning hole and is used for through-flow.

[0020] Optionally, the number of the through-flow holes is at least two, and at least two of the through-flow holes are spaced apart and arranged around the positioning hole.

[0021] Optionally, the guide hole is communicated with the positioning hole.

[0022] Optionally, the shell is detachably connected to the bottom cover.

[0023] The beneficial effect of the overcurrent protection device provided in the present application is that the present application can realize the overcurrent protection function in the liquefied gas supply process through the sealing component, can provide a quick and easy reset method through the push rod, and realize the residual extraction function, thereby effectively improving the safety of liquefied gas 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 One of the structural schematic diagrams of the overcurrent protection device provided in the embodiment of the present application;

[0026] Figure 2 A second structural schematic diagram of the overcurrent protection device provided in an embodiment of the present application;

[0027] Figure 3A structural cross-sectional view of the overcurrent protection device provided in an embodiment of the present application.

[0028] Among them, the reference numerals in the figure are:

[0029] 1. Shell; 2. Sealing component; 3. Push rod; 4. Flow channel; 5. Fluid inlet; 6. Fluid outlet;

[0030] 7. Pushing part; 8. Limiting wall; 9. Connecting shaft; 10. Rotating hole; 11. Counterweight part;

[0031] 12. Sealing ring; 13. Bottom cover; 14. Guide hole; 15. Positioning hole; 16. Through hole;

[0032] 17. Screws. 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 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.

[0035] 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.

[0036] According to one embodiment of the present application, referring to Figure 1-Figure 3As shown, the present application provides an overcurrent protection device, which mainly includes: a housing 1, a sealing component 2 and a push rod 3. The housing 1 is provided with a flow channel 4 and a fluid inlet 5 and a fluid outlet 6 connected to the flow channel 4; the sealing component 2 is movably arranged in the flow channel 4, and has a flow-through state and a flow-off state. In the flow-through state, the sealing component 2 is separated from the fluid outlet 6, and in the flow-off state, the sealing component 2 blocks the fluid outlet 6; the push rod 3 is rotatably arranged in the flow channel 4, and a part of the push rod 3 extends outside the flow channel 4. The push rod 3 is used to push the sealing component 2 to reset the sealing component 2 from the flow-off state to the flow-through state.

[0037] In this embodiment of the present application, the housing 1 serves as the basic frame of the entire device, and a flow channel 4 is provided in the housing 1 for the circulation of liquefied gas. A fluid inlet 5 is also provided at the bottom of the housing 1, and the fluid inlet 5 is used to connect to the gas outlet of the liquefied gas cylinder. A fluid outlet 6 is also provided at the top of the housing 1, and the fluid outlet 6 is used to connect to the liquefied gas pipeline to ensure that the gas can be smoothly transmitted from the liquefied gas cylinder to the gas-using equipment.

[0038] The sealing component 2 is a key component of the device, designed as a movable part, and is located in the flow channel 4 of the housing 1. The sealing component 2 has two working states, namely, a flow-through state and a flow-blocking state. In the flow-through state, it does not hinder the flow of gas and is away from the fluid outlet 6 due to its own gravity; in the flow-blocking state, it can tightly seal the fluid outlet 6 to prevent the gas from continuing to flow out.

[0039] The push rod 3 is a rotatable component, and part of it extends outside the housing 1 for easy manual operation. Its main function is to push the sealing component 2 through rotation to achieve the transition from the flow-off state to the flow-through state. That is, in non-emergency situations, the user can quickly restore gas flow without complicated operations.

[0040] Normal working state: When the liquefied gas cylinder is supplying gas normally, the liquefied gas flows into the flow channel 4 through the fluid inlet 5. Due to the dead weight of the sealing component 2, it remains at a position away from the fluid outlet 6 and does not interfere with the gas flow. The liquefied gas is smoothly transported to the liquefied gas pipeline through the fluid outlet 6.

[0041] Overcurrent protection mechanism is triggered: if an abnormality occurs, resulting in an abnormal increase in the liquefied gas flow rate, the thrust generated by the high-speed airflow overcomes the gravity of the sealing component 2, pushing the sealing component 2 to move along the airflow direction until it completely blocks the fluid outlet 6. This process quickly cuts off the airflow, preventing further liquefied gas leakage, and plays a role in overcurrent protection.

[0042] Reset mechanism: Once the danger is removed or the normal gas supply needs to be restored, the user can operate the push rod 3 to push the sealing component 2. The sealing component 2 can quickly and effectively return to the initial position, that is, the flow state, under the action of its own gravity and the push rod 3, and reopen the flow path of the liquefied gas. This design ensures safety and provides a convenient recovery method.

[0043] Furthermore, when it is necessary to extract the residual liquefied gas in the liquefied gas cylinder, the suction equipment is connected to the fluid outlet 6 of the overcurrent protection device. The negative pressure generated during suction will cause the sealing component 2 to move to the fluid outlet for blocking, thereby affecting the residual extraction operation. At this time, the sealing component 2 can be pushed away from the fluid outlet 6 by operating the push rod 3 to ensure that the suction channel is unobstructed.

[0044] Therefore, the embodiment of the present application implements overcurrent protection during the liquefied gas supply process through a simple and efficient mechanical structure, automatically triggers the protection mechanism by utilizing the characteristics of gas flow, and provides a quick and easy manual reset method, thereby effectively improving the safety of liquefied gas use.

[0045] Furthermore, the flexible design of the manual control of the push rod 3 in the embodiment of the present application can ensure the adaptability and functionality of the device through manual intervention during special operations such as extracting liquefied gas, further enhancing the safety and flexibility of liquefied gas usage scenarios.

[0046] According to one embodiment of the present application, referring to Figure 3 As shown, the push rod 3 has an inner end, which is an end arranged in the housing 1 . The inner end of the push rod 3 is formed with a pushing portion 7 protruding toward the sealing component 2 , and the pushing portion 7 is used to push the sealing component 2 .

[0047] In this embodiment of the present application, the inner end of the push rod 3 is designed to have a pushing portion 7 protruding toward the sealing component 2. This design enables the push rod 3 to effectively act on the sealing component 2 when rotating to generate a directional thrust. The shape and size of the pushing portion 7 can be designed according to actual needs to ensure that the sealing component 2 can be effectively pushed.

[0048] By directly acting on the sealing component 2 through the pushing portion 7 at the inner end of the push rod 3, the position of the sealing component 2 can be precisely controlled. This means that when the operator needs to reset the sealing component 2, the sealing component 2 can be adjusted from the flow-blocking state to the flow-through state more accurately and quickly, which reduces the operation time and improves efficiency and safety.

[0049] According to one embodiment of the present application, referring to Figure 3 As shown, a connecting shaft 9 is provided in the flow channel 4 , and a rotating hole 10 rotatably connected to the connecting shaft 9 is provided in the push rod 3 .

[0050] Specifically, the connecting shaft 9 is installed in the housing 1 as a fixed support structure, providing a stable central axis for the rotation of the push rod 3. The rotating hole 10 on the push rod 3 matches it, ensuring that the push rod 3 can rotate smoothly and accurately around the connecting shaft 9 in the housing 1. This design helps to control the movement trajectory of the push rod 3, so that the pushing part 7 at the inner end of the push rod 3 can accurately act on the sealing component 2, realizing the accurate conversion from the flow cut-off state to the flow through state.

[0051] According to one embodiment of the present application, referring to Figure 1-Figure 3 As shown, the push rod 3 has an outer end, which is an end arranged outside the shell 1. A counterweight portion 11 is arranged on the outer end of the push rod 3. The outer end of the push rod 3 is inclined in a direction away from the sealing component 2, so that the counterweight portion 11 is back to the pushing portion 7, that is, the pushing portion 7 and the counterweight portion 11 are located on opposite sides of the rotating hole 10; and the weight of the counterweight portion 11 is greater than the weight of the pushing portion 7, and the maximum distance a from the center of the rotating hole 10 to the counterweight portion 11 is greater than or equal to the maximum distance b from the center of the rotating hole 10 to the pushing portion 7; or, the weight of the counterweight portion 11 is equal to the weight of the pushing portion 7, and the maximum distance a from the center of the rotating hole 10 to the counterweight portion 11 is greater than the maximum distance b from the center of the rotating hole 10 to the pushing portion 7, so that when the entire device is inverted, the push rod 3 can rotate by itself.

[0052] In this embodiment of the present application, the push rod 3 is designed to include a pushing portion 7 and a counterweight portion 11. By designing the weight distribution and relative distance of the two parts, it is ensured that the push rod 3 can automatically adjust to the required working state in different placement states (upright or inverted).

[0053] In addition, a limiting wall 8 is provided in the shell 1. When the device is placed upright, the inner end of the push rod 3 can stably rest against the limiting wall 8. At this time, the pushing portion 7 of the push rod 3 is separated from the sealing component 2. During normal operation, the device is in a flow-through state. During overflow, the sealing component 2 blocks the fluid outlet 6, and the device is in a flow-cutting state. When it is necessary to quickly reset to the flow-through state, the push rod 3 can be pushed, and the inner end of the push rod 3 is separated from the limiting wall 8 of the shell 1, and the pushing portion 7 of the push rod 3 pushes the sealing component 2 to disengage from the fluid outlet 6.

[0054] 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 device can be inverted. When inverted, the sealing component 2 will move to the fluid outlet 6 for sealing. At this time, the push rod 3 takes effect. The push rod 3 rotates automatically under the action of the gravity of the counterweight 11. The inner end of the push rod 3 is separated from the limiting wall 8 of the shell 1, and the pushing portion 7 of the push rod 3 moves toward the sealing component 2, preventing the sealing component 2 from blocking the fluid outlet 6, so that the flow channel 4 is unobstructed, and no manual operation is required.

[0055] It can be understood that when the device is upright, the fluid inlet 5 is at the bottom of the housing 1 and the fluid outlet 6 is at the top of the housing 1. Figure 3 As shown; on the contrary, the inversion is Figure 3 The entire arrangement is shown reversed through 180°.

[0056] Therefore, the embodiment of the present application cleverly utilizes the push rod 3 as a counterweight lever, which not only realizes the control of overcurrent protection under normal conditions, but also automatically adapts and keeps the fluid outlet 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.

[0057] According to one embodiment of the present application, referring to Figure 3 As shown, a sealing ring 12 is provided at the fluid outlet 6, and the sealing component 2 is a sealing ball; in the flow-through state, the sealing ball is separated from the sealing ring 12, and in the flow-off state, the sealing ball blocks the sealing ring 12.

[0058] In this embodiment of the present application, the sealing ring 12 is a commonly used sealing element, which is usually made of elastic material, such as rubber or oil-resistant synthetic material, and can provide a good sealing effect. When the sealing ball is close to the sealing ring 12, a closed interface can be formed to effectively prevent the leakage of liquefied gas. This design can quickly and completely block the fluid outlet 6 when the flow passes through, and maintain good sealing performance.

[0059] The sealing ball is used as the sealing component 2. Its spherical design enables it to quickly move into the through hole of the sealing ring 12 at the fluid outlet 6 under the action of the airflow, effectively completing the blocking action. Compared with sealing components of other shapes, the spherical design reduces the friction resistance during the movement and speeds up the response speed, which is particularly important for sudden over-flow conditions, and can cut off the airflow more quickly.

[0060] The combined structure of the sealing ball and the sealing ring 12 is simple and easy to install and replace. In long-term use, if the sealing ring 12 or the sealing ball is worn, the user can easily disassemble and replace a new part, which has low maintenance costs and ensures the long-term effectiveness of the device.

[0061] According to one embodiment of the present application, referring to Figure 2 As shown, the housing 1 is provided with a bottom cover 13 , the bottom cover 13 is provided with a fluid inlet 5 and a guide hole 14 , and a portion of the push rod 3 extends to the outside of the flow channel 4 through the guide hole 14 .

[0062] Specifically, the guide hole 14 provides a precise path guide for the rotational movement of the push rod 3, limits the movement trajectory of the push rod 3 in the housing 1, and avoids possible deviation or shaking of the push rod 3 during rotation, thereby ensuring that the push portion 7 of the push rod 3 can accurately and stably act on the sealing ball, achieving precise conversion from flow-blocking to flow-through state.

[0063] According to one embodiment of the present application, referring to Figure 2 and Figure 3 As shown, the fluid inlet 5 includes: a positioning hole 15 and a flow hole 16. The positioning hole 15 is used to position the sealing ball; the flow hole 16 is connected to the positioning hole 15 and is used for flow.

[0064] For example, when the entire device is upright and working normally, the sealing ball can be located in the positioning hole 15, and the liquefied gas in the liquefied gas bottle can enter the flow channel 4 through the flow hole 16 beside the positioning hole 15.

[0065] According to one embodiment of the present application, referring to Figure 2 As shown, the number of the through-flow holes 16 is at least two, and the at least two through-flow holes 16 are arranged around the positioning hole 15 at intervals.

[0066] In this example, there are two through-flow holes 16 , which are located on two opposite sides of the positioning hole 15 and are mainly used to increase the gas flow rate.

[0067] According to one embodiment of the present application, referring to Figure 2 As shown, the guide hole 14 is connected to the positioning hole 15, that is, the guide hole 14 is connected to the fluid inlet 5. In this example, the overall structure of the guide hole 14 and the fluid inlet 5 is roughly T-shaped.

[0068] In this embodiment of the present application, during assembly, the bottom of the entire shell 1 can be connected to the gas outlet of the liquefied gas cylinder, and the liquefied gas in the liquefied gas cylinder can enter the flow channel 4 through the guide hole 14 and the fluid inlet 5.

[0069] When the device is upright, the counterweight lever push rod 3 does not work. When there is flow, the sealing ball blocks the fluid outlet 6, and the device is in a flow-cutting state. After the flow disappears, the sealing ball detaches from the fluid outlet 6, and the device is in a flow-through state.

[0070] When the residual liquefied gas in the liquefied gas cylinder needs to be poured out or when over-current protection is not required, the entire device is turned upside down. At this time, the push rod 3 rotates automatically under the gravity of the counterweight 11, preventing the sealing ball from blocking the fluid outlet 6, so that the flow channel 4 is unobstructed and the device is in a flow-through state.

[0071] According to one embodiment of the present application, referring to Figure 2 As shown, the housing 1 is detachably connected to the bottom cover 13. For example, the housing 1 is connected to the bottom cover 13 via screws 17.

[0072] Specifically, the detachable design allows the shell 1 to be easily separated from the bottom cover 13. When internal components such as the sealing ring 12, sealing ball or push rod 3 need to be cleaned, inspected or replaced, the operator can quickly open the shell 1 without complicated disassembly steps, effectively simplifying the maintenance process and reducing maintenance time.

[0073] 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 overcurrent protection device, characterized in that: include: A shell having a flow channel and a fluid inlet and a fluid outlet connected to the flow channel; a sealing component movably disposed in the flow channel and having a flow-through state and a flow-blocking state, wherein the sealing component is separated from the fluid outlet in the flow-through state and the sealing component blocks the fluid outlet in the flow-blocking state; A push rod is rotatably disposed in the flow channel, and a portion of the push rod extends outside the flow channel. The push rod is used to push the sealing component to reset the sealing component from the flow-blocking state to the flow-through state.

2. The overcurrent protection device according to claim 1, characterized in that: The push rod has an inner end, and a pushing portion protruding toward the sealing component is formed at the inner end of the push rod, and the pushing portion is used to push the sealing component.

3. The overcurrent protection device according to claim 2, characterized in that: A connecting shaft is arranged in the flow channel, and a rotating hole which is rotatably connected to the connecting shaft is arranged in the push rod.

4. The overcurrent protection device according to claim 3, characterized in that: The push rod has an outer end, the outer end of the push rod is provided with a counterweight portion, and the counterweight portion faces away from the pushing portion; The weight of the counterweight portion is greater than the weight of the pushing portion, and the maximum distance from the center of the rotating hole to the counterweight portion is greater than or equal to the maximum distance from the center of the rotating hole to the pushing portion; Alternatively, the weight of the counterweight portion is equal to the weight of the pushing portion, and the maximum distance from the center of the rotating hole to the counterweight portion is greater than the maximum distance from the center of the rotating hole to the pushing portion.

5. The overcurrent protection device according to any one of claims 1 to 4, characterized in that: A sealing ring is provided at the fluid outlet, and the sealing component is a sealing ball; In the flow-through state, the sealing ball is separated from the sealing ring, and in the flow-blocking state, the sealing ball blocks the sealing ring.

6. The overcurrent protection device according to claim 5, characterized in that: The shell is provided with a bottom cover, the bottom cover is provided with the fluid inlet and a guide hole, and a portion of the push rod extends to the outside of the flow channel through the guide hole.

7. The overcurrent protection device according to claim 6, characterized in that: The fluid inlet comprises: A positioning hole, used for positioning the sealing ball; The through-flow hole is connected with the positioning hole and is used for through-flow.

8. The overcurrent protection device according to claim 7, characterized in that: The number of the through-flow holes is at least two, and at least two of the through-flow holes are spaced apart and arranged around the positioning hole.

9. The overcurrent protection device according to claim 7, characterized in that: The guide hole is communicated with the positioning hole.

10. The overcurrent protection device according to claim 6, characterized in that: The shell body is detachably connected to the bottom cover.

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