Anti-corrosion telescopic butterfly valve

Abstract

The utility model relates to the technical field of protective supports, in particular to an anti-corrosion telescopic butterfly valve. The safety valve comprises a valve body and a telescopic joint, a protection device is arranged outside the valve body and comprises a fixing frame, the inner side of the fixing frame is fixedly connected with the valve body, four fixing blocks are fixedly connected to one end of the fixing frame, multiple sections of telescopic rods are fixedly connected to one ends of the fixing blocks, and the telescopic joint is fixedly connected to the other end of the fixing frame. The output end of the multi-section telescopic rod is fixedly connected with a circular plate, one end of the circular plate is fixedly connected with a threaded rod, the arc surface of the threaded rod is slidably connected with connecting plates, one ends of the four connecting plates are fixedly connected with a fixing ring, and the inner side of the fixing ring is fixedly connected with the telescopic joint. The problems that according to a traditional anti-corrosion telescopic butterfly valve, due to the fact that a telescopic joint is lack of a guide structure, transverse deflection, jamming and even structural failure occur due to the fact that the telescopic joint loses constraint in the axial telescopic process, and the performance and the service life of the butterfly valve are directly affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of protective support technology, and in particular to a corrosion-resistant telescopic butterfly valve. Background Technology

[0002] The corrosion-resistant telescopic butterfly valve is a butterfly valve with corrosion resistance and telescopic adjustment structure. It is mainly used in chemical, water treatment, food and pharmaceutical and other corrosive media transportation scenarios.

[0003] For example, publication number CN220396508U discloses a corrosion-resistant telescopic butterfly valve, including a valve seat with an eccentric valve plate rotatably connected inside. A telescopic joint is connected to the right end of the valve seat via a flange. An annular seat is integrally formed on the inner circumference of the valve seat. A corrosion-resistant sealing ring, fitted around the eccentric valve plate, is abutted at the right end of the annular seat. A metal pressure ring is abutted at the right end of the corrosion-resistant sealing ring. Several positioning rods are fixedly mounted on the right end of the annular seat. The left end of each positioning rod movably passes through the corrosion-resistant sealing ring and the metal pressure ring, and a pressure tube is movably sleeved on the right end of each positioning rod. The left and right ends of the pressure tube abut against the right end of the metal pressure ring and the left end face of the telescopic joint, respectively. This utility model allows for maintenance-free valve seat installation, convenient online replacement of the corrosion-resistant sealing ring, and stable installation of the corrosion-resistant sealing ring on the annular seat through the pressure of the pressure tube on the metal pressure ring, achieving boltless fixing, long service life, and low labor intensity during disassembly.

[0004] The aforementioned patents reduce the difficulty of valve body installation by using expansion joints and avoid damage to the sealing surface caused by forced assembly. However, the lack of a guiding structure in the expansion joints still exists, causing them to become laterally misaligned, jammed, or even structurally failed during axial expansion and contraction due to loss of restraint. This directly affects the valve's performance and service life. Therefore, a corrosion-resistant expansion butterfly valve is needed that can guide the expansion joints to prevent misalignment during axial expansion and contraction. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing anti-corrosion telescopic butterfly valves, where the telescopic joint lacks a guiding structure, causing it to laterally deviate due to loss of constraint during axial expansion and contraction. Therefore, this invention proposes an anti-corrosion telescopic butterfly valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a corrosion-resistant telescopic butterfly valve, comprising a valve body and a telescopic joint, wherein a protective device is provided on the outside of the valve body, the protective device comprising a fixing frame, the inner side of the fixing frame being fixedly connected to the valve body, four fixing blocks being fixedly connected to one end of the fixing frame, a multi-segment telescopic rod being fixedly connected to one end of the fixing blocks, a circular plate being fixedly connected to the output end of the multi-segment telescopic rod, a threaded rod being fixedly connected to one end of the circular plate, a connecting plate being slidably connected to the arc surface of the threaded rod, and a fixing ring being fixedly connected to one end of each of the four connecting plates, the inner side of the fixing ring being fixedly connected to the telescopic joint.

[0007] The effect achieved by the above components is that when the expansion joint moves, the fixed ring drives the connecting plate to move. At this time, the multi-segment telescopic rod drives the circular plate to move, so that the threaded rod limits the connecting plate and prevents the expansion joint from deviating in position during the movement.

[0008] Preferably, the arc surface of the multi-segment telescopic rod is fixedly connected with a connecting ring.

[0009] The effect achieved by the above components is that the connecting ring is fixed on the multi-section telescopic rod.

[0010] Preferably, the arc surface of the connecting ring is fixedly connected to an L-shaped support plate, and one end of the four L-shaped support plates is fixedly connected to the fixed frame.

[0011] The effect achieved by the above components is that the connecting ring is fixed on the L-shaped support plate, and the L-shaped support plate is fixed on the fixed frame.

[0012] Preferably, one end of the fixing ring is fixedly connected to two limiting rods, and the arc surfaces of the two limiting rods are slidably connected to the fixing frame.

[0013] The effect achieved by the above components is that the movement of the fixed ring causes the limiting rod to slide on the fixed frame.

[0014] Preferably, the threaded rod has a nut connected to its arc-shaped surface.

[0015] The effect achieved by the above components is that the nut and the threaded rod are compatible.

[0016] Preferably, the valve body is provided with a fixing device on its exterior. The fixing device includes two fixing plates, one side of which is close to the other and is fixedly connected to the valve body. A rubber cylinder is fixedly connected to one side of each fixing plate.

[0017] The effect achieved by the above components is that the rubber cylinder is fixed to the fixing plate, and the fixing plate is fixed to the valve body.

[0018] Preferably, the two rubber cylinders are internally slidably connected by a handle, the handle having a "U" shaped cross-section.

[0019] The effect achieved by the above components is that the handle slides on the rubber tube under force.

[0020] Preferably, the arc surface of the handle is fixedly connected with an anti-slip sleeve, which is made of rubber.

[0021] The effect achieved by the above components is to increase friction by implementing anti-slip sleeves.

[0022] Preferably, one end of the handle is fixedly connected to a limiting block, and one end of the limiting block is fixedly connected to a rubber ring.

[0023] The effect achieved by the above components is that the rubber ring is fixed on the limiting block, and the limiting block is fixed on the handle.

[0024] In summary, the beneficial effects of this utility model are as follows:

[0025] In this invention, a protective device is used to prevent the expansion joint from shifting during adjustment. The extension or retraction of the multi-segment telescopic rod output end effectively prevents the expansion joint from shifting during movement. This protective device solves the problem of traditional anti-corrosion telescopic butterfly valves where the expansion joint lacks a guiding structure, causing it to shift laterally, jam, or even fail structurally during axial expansion and contraction due to loss of constraint, directly affecting the performance and service life of the butterfly valve.

[0026] In this invention, by means of a fixing device, when the unassembled valve body needs to be moved, the anti-slip sleeve is pulled, causing it to slide inside the rubber cylinder under force until the rubber ring presses against the anti-slip cylinder. At this point, the anti-slip sleeve is held and a lifting force is applied. The continuous pulling force is transmitted through the handle to the fixing plate, and then from the fixing plate to the valve body, thus moving the valve body. This fixing device solves the problem of inconvenient movement caused by insufficient external force points in a traditional anti-corrosion telescopic butterfly valve. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the protective structure of this utility model;

[0029] Figure 3 This is a partial structural diagram of the protective structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the fixed structure of this utility model.

[0031] Legend: 1. Valve body; 2. Protective device; 201. Fixing frame; 202. Fixing block; 203. Multi-section telescopic rod; 204. Circular plate; 205. Threaded rod; 206. Connecting plate; 207. Nut; 208. Fixing ring; 209. Connecting ring; 210. L-shaped support plate; 211. Limiting rod; 3. Fixing device; 31. Fixing plate; 32. Rubber cylinder; 33. Handle; 34. Anti-slip sleeve; 35. Rubber ring; 36. Limiting block; 4. Expansion joint. Detailed Implementation

[0032] Reference Figure 1As shown, this utility model provides a technical solution: a corrosion-resistant telescopic butterfly valve, including a valve body 1 and a telescopic joint 4, a protective device 2 is provided on the outside of the valve body 1, and a fixing device 3 is provided on the outside of the valve body 1.

[0033] The specific setup and function of its protective device 2 and fixing device 3 will be explained below.

[0034] Reference Figure 2 and Figure 3 As shown in this embodiment: the protective device 2 includes a fixed frame 201, the inner side of which is fixedly connected to the valve body 1. Four fixed blocks 202 are fixedly connected to one end of the fixed frame 201. Multiple telescopic rods 203 are fixedly connected to one end of each fixed block 202. A circular plate 204 is fixedly connected to the output end of the multiple telescopic rods 203. A threaded rod 205 is fixedly connected to one end of the circular plate 204. A connecting plate 206 is slidably connected to the arc surface of the threaded rod 205. A fixed ring 208 is fixedly connected to one end of each of the four connecting plates 206. The inner side of the fixed ring 208 is fixedly connected to the telescopic joint 4. This achieves the effect that when the telescopic joint 4 moves, the fixed ring 208 drives the connecting plate 206 to move. At this time, the multiple telescopic rods 203 drive the circular plate 204 to move, so that the threaded rod 205 limits the connection plate 206, preventing the telescopic joint 4 from deviating in position during movement. A connecting ring 209 is fixedly connected to the arc surface of the multiple telescopic rods 203. This achieves the effect of fixing the connecting ring 209 to the multi-segment telescopic rod 203. An L-shaped support plate 210 is fixedly connected to the arc surface of the connecting ring 209, and one end of each of the four L-shaped support plates 210 is fixedly connected to the fixed frame 201. This achieves the effect of fixing the connecting ring 209 to the L-shaped support plates 210, and the L-shaped support plates 210 to the fixed frame 201. Two limiting rods 211 are fixedly connected to one end of the fixed ring 208, and the arc surfaces of the two limiting rods 211 are slidably connected to the fixed frame 201. This achieves the effect of the fixed ring 208 moving to cause the limiting rods 211 to slide on the fixed frame 201. A nut 207 is threadedly connected to the arc surface of the threaded rod 205. This achieves the effect of the nut 207 and the threaded rod 205 being compatible.

[0035] Reference Figure 4As shown in this embodiment: the fixing device 3 includes two fixing plates 31, with one side of the two fixing plates 31 close to each other and fixedly connected to the valve body 1. A rubber cylinder 32 is fixedly connected to one side of the fixing plate 31. This achieves the effect of the rubber cylinder 32 being fixed to the fixing plate 31, and the fixing plate 31 being fixed to the valve body 1. A handle 33 is slidably connected inside the two rubber cylinders 32, and the cross-section of the handle 33 is "U". This achieves the effect of the handle 33 sliding on the rubber cylinder 32 under force. An anti-slip sleeve 34 is fixedly connected to the arc surface of the handle 33. The anti-slip sleeve 34 is made of rubber. This achieves the effect of the anti-slip sleeve 34 increasing friction. A limit block 36 is fixedly connected to one end of the handle 33, and a rubber ring 35 is fixedly connected to one end of the limit block 36. This achieves the effect of the rubber ring 35 being fixed to the limit block 36, and the limit block 36 being fixed to the handle 33.

[0036] Working principle: Using the protective device 2, when it is necessary to prevent the expansion joint 4 from tilting during adjustment, the operator first installs the fixing frame 201 on the valve body 1 and the fixing ring 208 on the expansion joint 4. This causes the multi-segment telescopic rod 203 to move the connecting plate 206. The connecting plate 206 then drives the threaded rod 205 to slide onto the connecting plate 206, and the nut 207 is screwed onto the threaded rod 205. When the telescopic rod moves, the fixing ring 208 drives the connecting plate 206 to move, causing the threaded rod 205 to move the connecting plate 206. The movement causes the output end of the multi-segment telescopic rod 203 to extend or retract, and the movement of the fixed ring 208 drives the limit rod 211 to slide on the fixed frame 201. At this time, the multi-segment telescopic rod 203 and the limit rod 211 can effectively prevent the telescopic joint 4 from deviating in position during the movement. Through the protective device 2, the problem of the traditional anti-corrosion telescopic butterfly valve, where the telescopic joint 4 lacks a guiding structure, causes it to deviate laterally, get stuck, or even fail structurally during axial extension and contraction due to loss of restraint, directly affecting the performance and service life of the butterfly valve.

[0037] When the unassembled valve body 1 needs to be moved using the fixing device 3, the operator first pulls the anti-slip sleeve 34, causing it to slide the handle 33 inside the rubber cylinder 32 until the rubber ring 35 presses against the anti-slip cylinder. At this point, the operator holds the anti-slip sleeve 34 and applies a lifting force. The continuous pulling force is transmitted through the handle 33 to the fixing plate 31, and then from the fixing plate 31 to the valve body 1, thus moving the valve body 1. The fixing device 3 solves the problem of inconvenient movement caused by insufficient external force points in a traditional anti-corrosion telescopic butterfly valve.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A corrosion-resistant telescopic butterfly valve, comprising a valve body (1) and a telescopic joint (4), characterized in that: The valve body (1) is provided with a protective device (2) on its exterior. The protective device (2) includes a fixed frame (201). The inner side of the fixed frame (201) is fixedly connected to the valve body (1). One end of the fixed frame (201) is fixedly connected to four fixed blocks (202). One end of the fixed block (202) is fixedly connected to a multi-segment telescopic rod (203). The output end of the multi-segment telescopic rod (203) is fixedly connected to a circular plate (204). One end of the circular plate (204) is fixedly connected to a threaded rod (205). The arc surface of the threaded rod (205) is slidably connected to a connecting plate (206). One end of the four connecting plates (206) is fixedly connected to a fixing ring (208). The inner side of the fixing ring (208) is fixedly connected to the telescopic joint (4).

2. The corrosion-resistant telescopic butterfly valve according to claim 1, characterized in that: The arc surface of the multi-segment telescopic rod (203) is fixedly connected to a connecting ring (209).

3. The corrosion-resistant telescopic butterfly valve according to claim 2, characterized in that: The arc surface of the connecting ring (209) is fixedly connected to an L-shaped support plate (210), and one end of the four L-shaped support plates (210) is fixedly connected to the fixed frame (201).

4. The corrosion-resistant telescopic butterfly valve according to claim 3, characterized in that: Two limiting rods (211) are fixedly connected to one end of the fixed ring (208), and the arc surfaces of the two limiting rods (211) are slidably connected to the fixed frame (201).

5. The corrosion-resistant telescopic butterfly valve according to claim 1, characterized in that: The threaded rod (205) is threaded with a nut (207) on its arc surface.

6. The corrosion-resistant telescopic butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a fixing device (3) on its exterior. The fixing device (3) includes two fixing plates (31). The two fixing plates (31) are fixedly connected to the valve body (1) on one side that is close to each other. A rubber cylinder (32) is fixedly connected to one side of the fixing plate (31).

7. The corrosion-resistant telescopic butterfly valve according to claim 6, characterized in that: The two rubber cylinders (32) are internally slidably connected by handles (33), the handles (33) having a "U" shaped cross section.

8. The corrosion-resistant telescopic butterfly valve according to claim 7, characterized in that: The handle (33) has an anti-slip sleeve (34) fixedly connected to its arc surface, and the anti-slip sleeve (34) is made of rubber.

9. The corrosion-resistant telescopic butterfly valve according to claim 8, characterized in that: One end of the handle (33) is fixedly connected to a limiting block (36), and one end of the limiting block (36) is fixedly connected to a rubber ring (35).

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