Reset device for safety shut-off valve

Abstract

The embodiment of the present application provides a reset device of a safety cut-off valve, which comprises a base, a supporting rod and an operating rod, the base comprises a bottom plate and two vertical plates oppositely arranged on the bottom plate; the two ends of the supporting rod are rotatably connected with the two vertical plates respectively; the operating rod is connected with the supporting rod, the operating rod is located between the two vertical plates, and the operating rod is provided with a connecting part for being connected with a reset part of the safety cut-off valve; the operating rod is configured to, when pressure is applied downward to one end of the operating rod away from the connecting part, the connecting part is deflected upward under the driving of the rotation of the supporting rod, so that the operating rod drives the reset part to be lifted, and thus the safety cut-off valve is switched from a locked state to an open state. The reset device of the safety cut-off valve provided by the embodiment of the present application utilizes the connecting part of the operating rod to form a lever structure, so that the physical consumption of an operator in lifting the reset part is reduced, and the operation is convenient.

Description

Technical Field

[0001] This application relates to safety shut-off valve technology, and more particularly to a reset device for a safety shut-off valve. Background Technology

[0002] In industrial production, especially in fields involving toxic or hazardous media or high-pressure fluids such as natural gas and liquefied petroleum gas, safety shut-off valves are installed in fluid pipelines that transmit the media to ensure the safety of personnel and equipment.

[0003] The safety shut-off valve in the relevant technology is equipped with a reset rod. When the valve is triggered and locked, the operator must manually pull the reset rod to release the valve and reopen it. However, when manually pulling the reset rod, the operator needs to overcome the internal reset resistance of the safety shut-off valve. For large-diameter valves or valves under high pressure differential conditions, the reset resistance is large, requiring the operator to apply a large pulling force, which is inconvenient. Utility Model Content

[0004] This application provides a reset device for a safety shut-off valve, which solves the problems of high resistance and inconvenient operation when lifting the reset rod of the safety shut-off valve in related technologies.

[0005] This application provides a reset device for a safety shut-off valve, comprising:

[0006] The base includes a base plate and two upright plates disposed opposite each other on the base plate;

[0007] The support rod is rotatably connected at both ends to the two upright plates respectively;

[0008] An operating lever is connected to the support rod and is located between the two vertical plates. The operating lever is provided with a connecting part for connecting to the reset part of the safety shut-off valve.

[0009] The operating lever is configured such that when downward pressure is applied to the end of the operating lever opposite to the connecting part, the connecting part deflects upward under the rotation of the support rod, so that the operating lever drives the reset part to lift, thereby switching the safety shut-off valve from the locked state to the open state.

[0010] In some possible implementations, the connecting part is a limiting block provided at the end of the operating lever, and the limiting block has a slot for engaging with the reset part.

[0011] In some possible implementations, the inner wall of the slot is constructed with at least one step, which divides the slot into at least two sub-slots of different widths. Each of the sub-slots is arranged sequentially at intervals from the connecting part toward the operating rod, and the width of the at least two sub-slots gradually increases from the operating rod toward the connecting part.

[0012] In some possible implementations, the slot is a rectangular slot; or, the slot is a tapered slot that gradually expands outward along the axial direction of the operating lever.

[0013] In some possible implementations, the slot for abutting the sidewall of the reset part is provided with an elastic buffer layer.

[0014] In some possible implementations, the operating lever further includes a handle end located at one end of the operating lever away from the connecting portion, and the handle end is provided with an anti-slip layer.

[0015] In some possible implementations, the operating lever and the support rod have a connection point, and the distance between the handle end and the connection point is greater than the distance between the connecting portion and the connection point.

[0016] In some possible implementations, a limiting rod is also included, with its two ends connected to the two upright plates respectively. The limiting rod is located below the support rod, which is located between the connecting part and the limiting rod. The limiting rod is used to block the rotation path of the operating rod to limit the lifting distance of the connecting part to the reset part.

[0017] In some possible implementations, the two ends of the support rod pass through the two upright plates respectively, and a fastener is provided at the end of the support rod that protrudes from the upright plate to prevent the support rod from detaching from the upright plate.

[0018] In some possible implementations, the base, the support rod, and the operating lever are all metal components.

[0019] The safety shut-off valve reset device provided in this application, when the end of the operating rod away from the connecting part is pressed downward, the connecting part is deflected upward under the drive of the rotation of the support rod, so that the operating rod drives the reset part to lift, thereby switching the safety shut-off valve from the locked state to the open state.

[0020] Therefore, a lever structure is formed by the base, operating rod, and support rod. The operating rod rotates around the support rod, and the connecting part and the downward pressure-applying end are located on both sides of the support rod. When the operator applies downward pressure on the end of the operating rod away from the connecting part, the connecting part connected to the reset part is subjected to an upward lifting force greater than the downward pressure due to the amplification effect of the lever. This enables the operator to overcome the reset resistance inside the safety shut-off valve and reduce the physical strength required to manually operate the reset part. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a schematic diagram of the reset device structure of the safety shut-off valve in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the connecting part in an embodiment of this application;

[0024] Figure 3 for Figure 2 A schematic diagram of the connecting part in another embodiment.

[0025] Explanation of reference numerals in the attached figures

[0026] 100. Base;

[0027] 110. Base plate; 120. Vertical plate;

[0028] 200. Support rod;

[0029] 210. Fasteners;

[0030] 300. Control lever;

[0031] 310. Connecting part; 311. Groove; 312. Step; 313. Sub-groove; 314. Elastic buffer layer;

[0032] 320. Handle end; 330. Connection point;

[0033] 400. Limit rod;

[0034] 500. Valve body; 510. Lifting end; 520. Rod body.

[0035] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0040] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0041] As described in the background art, the safety shut-off valve in the relevant technology is equipped with a reset rod. When the valve is triggered and locked, the operator must manually pull the reset rod to release the valve from its locked state and reopen the safety shut-off valve. However, when manually pulling the reset rod, the operator needs to overcome the internal reset resistance of the safety shut-off valve. For large-diameter valves or valves under high pressure differential conditions, the reset resistance is relatively large, requiring the operator to apply a large pulling force, which is inconvenient.

[0042] Based on the above description, one or more embodiments of this application provide a reset device for a safety shut-off valve. When pressure is applied downward to the end of the operating rod away from the connecting part, the connecting part deflects upward under the rotation of the support rod, so that the operating rod drives the reset part to lift, thereby switching the safety shut-off valve from the locked state to the open state.

[0043] Therefore, by using the operating rod and the support rod to form a lever, with the operating rod rotating around the support rod as the axis of rotation, the connecting part and the downward pressure-applying end are located on both sides of the support rod. When the operator applies downward pressure on the end of the operating rod away from the connecting part, the connecting part connected to the reset part is subjected to an upward lifting force greater than the downward pressure due to the lever arm. This allows the operator to overcome the reset resistance inside the safety shut-off valve and reduce the physical strength required to manually operate the reset part.

[0044] The following description, in conjunction with the accompanying drawings, illustrates the solutions of the embodiments of this application.

[0045] like Figure 1 As shown, the reset device for the safety shut-off valve in this embodiment includes a base 100, a support rod 200, and an operating rod 300.

[0046] The base 100 includes a base plate 110 and two upright plates 120 disposed opposite each other on the base plate 110; the two ends of the support rod 200 are rotatably connected to the two upright plates 120 respectively; the operating rod 300 is connected to the support rod 200 and is located between the two upright plates 120, and the operating rod 300 has a connecting part 310 for connecting with the reset part of the safety shut-off valve; the operating rod 300 is configured such that when pressure is applied downward to the end of the operating rod 300 away from the connecting part 310, the connecting part 310 is deflected upward by the rotation of the support rod 200, so that the operating rod 300 drives the reset part to lift, thereby switching the safety shut-off valve from the locked state to the open state.

[0047] As can be seen from the above description, the reset device of the safety shut-off valve in this embodiment of the application forms a lever structure using a base 100, an operating rod 300, and a support rod 200. The operating rod 300 rotates around the support rod 200, and the connecting part 310 and the downward pressure-applying end are located on both sides of the support rod 200. When the operator applies downward pressure to the end of the operating rod 300 away from the connecting part 310, the connecting part 310 connected to the reset part receives an upward lifting force greater than the downward pressure due to the amplification effect of the lever. This allows the operator to overcome the reset resistance inside the safety shut-off valve and reduce the physical strength required to manually operate the reset part.

[0048] It should be noted that the reset device in this application embodiment is suitable for safety shut-off valves that can only be unlocked and reopened by manually pulling the reset part. For large-diameter industrial safety shut-off valves, such as the MADAS M16 / RM NA series gas emergency shut-off valves, under high pressure conditions, the medium pressure difference and spring force are superimposed, and the operator may need to exert hundreds of Newtons of force to directly pull the reset rod, which is difficult to operate. Therefore, the reset device in this application embodiment can be used to pry up the lifting rod using the lever principle, thereby reducing the labor intensity of the operator.

[0049] In this embodiment, the type and model of the safety shut-off valve are not absolutely limited, and the position and form of the reset part on the safety shut-off valve can also be flexibly varied. For example, the reset part is a lifting rod provided on the safety shut-off valve, which is provided with a lifting end 510 for easy lifting. Therefore, by engaging the connecting part 310 with the lifting end 510, the lifting rod can be lifted by the operating rod 300.

[0050] like Figure 1 As shown in the embodiment of this application, the base 100's floor and upright plate 120 are both rectangular plates made of metal. The base plate 110 and the upright plate 120 are connected by welding or bolts to form an approximately "U"-shaped cross-sectional structure. There is a certain distance between the two upright plates 120 to accommodate the support rod 200 and the operating rod 300.

[0051] In some embodiments, the connecting part 310 is a limiting block provided at the end of the operating lever 300, and the limiting block is provided with a slot 311 for engaging with the reset part.

[0052] The connecting part 310 and the main body of the operating lever 300 can be integrally connected by welding, and the slot 311 on the connecting part 310 faces the side away from the main body of the operating lever 300.

[0053] like Figure 3As shown, the safety shut-off valve in the related technology includes a valve body 500 and a lifting end 510 disposed on the valve body 500. The cross-sectional dimension of the lifting end 510 is larger than the rod diameter of the rod body portion 520 of the reset part, so that the operator can manually lift the lifting end 510. Therefore, the slot 311 provided in the connecting part 310 can be directly fitted into the rod body portion 520 of the reset part. When the connecting part 310 is subjected to force and deflected upward, the lifting end 510 with a large cross-sectional dimension limits and engages the connecting part 310 to disengage from the rod body portion 520, thereby forming a stable connection between the connecting part 310 and the reset part.

[0054] Here, the slot 311 can be a rectangular slot or a semi-circular slot, flexibly set according to the actual structural form of the reset part, as long as the slot 311 of the connecting part 310 matches and locks with the size of the reset part. In some embodiments, the slot 311 is a tapered slot that gradually expands outward along the axial direction of the operating rod 300. The tapered slot design can flexibly adapt to reset parts of different sizes within a certain range, such as cylindrical rod-shaped reset parts or prism rod-shaped reset parts, etc., without replacing the connecting part 310 to adapt to different safety shut-off valves, improving the flexibility and adaptability of the reset device.

[0055] In some embodiments, such as Figure 2 As shown, the inner wall of the slot 311 has at least one step 312, which divides the slot 311 into at least two sub-slots 313 with different widths. Each sub-slot 313 is arranged sequentially at intervals from the connecting part 310 toward the operating rod 300, and the width of the at least two sub-slots 313 gradually increases from the operating rod 300 toward the connecting part 310.

[0056] The aforementioned slot 311 is divided into at least two sub-slots 313. This structure can be formed directly by stamping or integral casting. By setting a slot 311 to accommodate various reset parts of different diameters, the reset part is inserted into the sub-slot 313 with the closest diameter. Operators can complete the connection between the connecting part 310 and the reset part without changing the operating rod 300. Thus, valves of different diameters in the same factory can be reset using the same reset device, further improving the adaptability of the reset device.

[0057] Since the width of at least two sub-slots 313 gradually increases from the operating lever 300 towards the connecting part 310, the reset part can only slide gradually from the sub-slot 313 with the larger width to the sub-slot 313 with the smaller width, and finally form a snap-fit ​​with the sub-slot 313 with the diameter closest to the reset part. This design allows reset parts of different diameters to be matched with different sub-slots 313, avoiding wear and failure of a single slot 311 after long-term use. In addition, the step 312 design also forms a reinforcing rib structure inside the slot 311 of the connecting part 310, further improving the overall rigidity of the connecting part 310.

[0058] In some embodiments, the slot 311 is provided with an elastic buffer layer 314 on the side wall of the reset part.

[0059] The aforementioned elastic buffer layer 314 can be made of polyurethane, nitrile rubber, or other high-performance engineering plastics. Since the lifting rod of the reset part is mostly made of stainless steel, the direct contact and collision between the connecting part 310 and the reset part can easily cause scratches and damage to the reset part. The elastic buffer layer 314, as a soft medium isolation layer between the connecting part 310 and the reset part, absorbs the impact force of the connecting part 310 and the reset part through its own deformation, which is beneficial to protecting the reset part. At the same time, the elastic buffer layer 314 can also enhance the tightness of the connection between the reset part and the connecting part 310, thereby making it easier for operators to quickly lift the reset part using the operating rod 300.

[0060] like Figure 1 As shown, the operating lever 300 in this embodiment of the application also includes a handle end 320, which is located at the end of the operating lever 300 away from the connecting part 310, and the handle end 320 is provided with an anti-slip layer.

[0061] The anti-slip layer on the handle end 320 can be a rubber sleeve or polyurethane coating fitted on the operating rod 300, or knurled metal directly etched on the operating rod 300, as long as it can enhance the friction for the operator to grip the handle end 320.

[0062] Furthermore, the operating lever 300 and the support rod 200 have a connection point 330, and the distance between the handle end 320 and the connection point 330 is greater than the distance between the connecting part 310 and the connection point 330.

[0063] Here, the operating lever 300 and the support lever 200 can be integrally formed metal rods, or the operating lever 300 and the support lever 200 can be welded together to form a cross-shaped rod.

[0064] The connection point 330 between the operating lever 300 and the support rod 200 is the fulcrum of the lever structure. According to the lever principle, the product of the operator's downward pressure and the lever arm length of the handle end 320 is equal to the product of the lifting force required by the reset part and the lever arm length of the connecting part 310. Here, the lever arm of the handle end 320 is the distance between the handle end 320 and the connection point 330; the lever arm of the connecting part 310 is the distance between the connecting part 310 and the connection point 330.

[0065] Therefore, the lever arm length of the handle end 320 is greater than that of the lever arm length of the connecting part 310, which can reduce the actual downward pressure applied by the operator. The longer the lever arm length of the handle end 320, the greater the movement distance of the handle end 320 under the same deflection angle, making operation more effortless.

[0066] For example, the ratio of the lever arm length of the handle end 320 to the lever arm length of the connecting part 310 is 3:1. That is, when the operator applies one-third of the downward pressure, the reset part is lifted up, thereby reducing the physical strength of the operator.

[0067] In some embodiments, the reset device further includes a limiting rod 400, the two ends of which are connected to two upright plates 120 respectively. The limiting rod 400 is located below the support rod 200, and the support rod 200 is located between the connecting part 310 and the limiting rod 400. The limiting rod 400 is used to block the rotation path of the operating rod 300 to limit the lifting distance of the connecting part 310 to the reset part.

[0068] The aforementioned limiting rod 400 can be directly welded and fixed between the two upright plates 120, or the two ends of the limiting rod 400 can be respectively inserted through the two upright plates 120 and fixed to the upright plates 120 by bolts that cooperate with the limiting rod 400.

[0069] By setting a limit rod 400, when the operating rod 300 is pressed down, the rod body of the operating rod 300 contacts the limit rod 400. The limit rod 400 physically prevents the operating rod 300 from continuing to rotate, avoiding excessive pulling of the reset part by the connecting part 310 and damage to the internal locking structure of the safety shut-off valve, thus eliminating the risk of over-extension of the reset part. Therefore, the height of the limit rod 400 on the vertical plate 120 should be set according to the maximum lifting height of the reset part. When the operating rod 300 rotates to abut the limit rod 400, the reset part is lifted to the maximum design height position. For different types and models of safety shut-off valves, the maximum design height of the reset part is different. Therefore, in this embodiment, the position of the limit rod 400 on the vertical plate 120 is not absolutely limited.

[0070] like Figure 1 As shown, in this embodiment of the application, the two ends of the support rod 200 pass through the two upright plates 120 respectively. The end of the support rod 200 that passes through the upright plate 120 is provided with a fastener 210, which is used to prevent the support rod 200 from detaching from the upright plate 120.

[0071] The aforementioned support rod 200 is rotatable relative to the upright plate 120. Both ends of the support rod 200 are limited and prevented from detaching from the upright plate 120 by fasteners 210, without affecting the rotation of the support rod 200. In some embodiments, the support rod 200 can also be connected to the upright plate 120 via a bushing, as long as it can rotate relative to the upright plate 120.

[0072] In this embodiment, the base 100, support rod 200, operating rod 300, and limiting rod 400 are all metal parts. The size of the reset device can also be flexibly varied for different work sites.

[0073] For example, the base 100 has a floor size of 120*120mm, the two uprights 120 are both 120*120mm in size, the distance between the two uprights 120 is 80mm, the support rod 200 is a 120mm long metal rod, and both ends are locked and fixed to the uprights 120 by bolts. The limiting rod 400 is an 80mm long metal rod, and both ends are directly welded and fixed between the two uprights 120. The overall length of the operating rod 300 is 350mm, and the length of the connecting part 310 is 60mm.

[0074] An exemplary usage process of the safety shut-off valve reset device according to an embodiment of this application is as follows:

[0075] The safety shut-off valve on the factory gas pipeline automatically closes and enters a locked state when a safety hazard such as gas leakage, overpressure, or underpressure is triggered. When the operator confirms on-site that the triggering cause has been eliminated, the reset device is placed on the valve seat of the safety shut-off valve. The slot 311 of the connecting part 310 of the operating rod 300 is inserted into the rod body part 520 where the reset part is located. The connecting part 310 is disengaged by the lifting end 510 on the reset part. At this time, the operator presses down the handle end 320, and the operating rod 300 deflects under the fulcrum hinge action of the connection point 330. The connecting part 310 moves upward accordingly, driving the reset part to be lifted until the operating rod 300 is blocked by the limit rod 400. After the reset part is lifted, the locked state of the safety shut-off valve is switched to the normal open state.

[0076] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0077] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A reset device for a safety shut-off valve, characterized by include: The base (100) includes a base plate (110) and two upright plates (120) disposed opposite each other on the base plate (110). The support rod (200) is rotatably connected at both ends to the two upright plates (120); An operating lever (300) is connected to the support rod (200). The operating lever (300) is located between the two upright plates (120). The operating lever (300) is provided with a connecting part (310) for connecting with the reset part of the safety shut-off valve. The operating lever (300) is configured such that when pressure is applied downward to the end of the operating lever (300) away from the connecting part (310), the connecting part (310) deflects upward under the rotation of the support rod (200), so that the operating lever (300) drives the reset part to lift, thereby switching the safety shut-off valve from the locked state to the open state.

2. The reset device of a safety shut-off valve according to claim 1, characterized by The connecting part (310) is a limiting block provided at the end of the operating lever (300), and the limiting block is provided with a slot (311) for engaging with the reset part.

3. The reset device of a safety shut-off valve according to claim 2, characterized by The inner wall of the slot (311) has at least one step (312), which divides the slot (311) into at least two sub-slots (313) with different widths. Each sub-slot (313) is arranged sequentially at intervals from the connecting part (310) toward the operating rod (300), and the width of the at least two sub-slots (313) gradually increases from the operating rod (300) toward the connecting part (310).

4. The reset device of a safety shut-off valve according to claim 2, characterized by The slot (311) is a rectangular slot; or the slot (311) is a tapered slot that gradually expands outward along the axial direction of the operating lever (300).

5. The reset device of a safety shut-off valve according to claim 2, wherein The slot (311) is provided with an elastic buffer layer (314) for abutting the side wall of the reset part.

6. The reset device for the safety shut-off valve according to any one of claims 1 to 5, characterized in that, The operating lever (300) also includes a handle end (320), which is located at the end of the operating lever (300) away from the connecting part (310), and the handle end (320) is provided with an anti-slip layer.

7. The reset device of a safety shut-off valve according to claim 6, characterized in that The operating lever (300) and the support rod (200) have a connection point (330), and the distance between the handle end (320) and the connection point (330) is greater than the distance between the connecting part (310) and the connection point (330).

8. The reset device of a safety shut-off valve according to claim 6, wherein It also includes a limiting rod (400), the two ends of which are connected to the two upright plates (120) respectively. The limiting rod (400) is located below the support rod (200), and the support rod (200) is located between the connecting part (310) and the limiting rod (400). The limiting rod (400) is used to block the rotation path of the operating rod (300) to limit the lifting distance of the connecting part (310) to the reset part.

9. The reset device of a safety shut-off valve according to any one of claims 1 to 5, characterized in that, The two ends of the support rod (200) pass through the two upright plates (120) respectively. A fastener (210) is provided at one end of the support rod (200) that passes through the upright plate (120). The fastener (210) is used to prevent the support rod (200) from detaching from the upright plate (120).

10. The reset device of a safety shut-off valve according to any one of claims 1 to 5, characterized in that The base (100), the support rod (200), and the operating rod (300) are all metal parts.

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