Easily-detached butterfly valve with high sealing performance

Abstract

The utility model provides a butterfly valve easy to disassemble, which is simple in structure, convenient to disassemble and high in sealing performance, and comprises a valve body, a valve cover arranged on the valve body, a water inlet channel, a water outlet channel and a valve plate arranged between the water inlet channel and the water outlet channel, the water inlet channel and the water outlet channel are arranged on the valve body, a valve rod is arranged on the valve body, one end of the valve rod is connected with the valve plate, and the other end of the valve rod is connected with the valve plate. The other end of the valve rod penetrates out of the valve cover, a flange pipe connected with an external pipeline is arranged at the position, located on the water outlet channel, of the valve body in a sliding mode, a fixing rod is arranged in the flange pipe and abuts against the end of the valve body, and a connecting rod is arranged on the fixing rod. A pushing device used for pushing the connecting rod to slide so as to drive the flange pipe to slide is arranged in the water outlet channel, and a sealing device is arranged between the flange pipe and the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a detachable butterfly valve with high sealing performance. Background Art

[0002] With the development of society, pipeline connections are required both in production and in daily life. In pipeline connections, pipeline connectors need to be applied, and among them, the butterfly valve is one of the commonly used pipeline connectors.

[0003] Although the existing butterfly valve has good sealing performance and can meet the use requirements, when installing or replacing it, since the butterfly valve is tightly installed in the pipeline, it is extremely laborious and troublesome to take it down, which is not conducive to the installation, maintenance and replacement by the staff.

[0004] To solve this problem, the present utility model is thus produced. Summary of the Utility Model

[0005] Therefore, in view of the above problems, the present utility model provides a detachable butterfly valve with high sealing performance, which has a simple structure and is convenient for disassembly.

[0006] To solve the above technical problems, the solution adopted by the present utility model is as follows: A detachable butterfly valve with high sealing performance includes a valve body, a valve cover provided on the valve body, a water inlet channel and a water outlet channel opened on the valve body, a valve plate provided between the water inlet channel and the water outlet channel. A valve rod is provided on the valve body. One end of the valve rod is connected to the valve plate, and the other end of the valve rod passes through the valve cover. A flange pipe connected to an external pipeline is slidably provided at the position of the water outlet channel of the valve body. A fixing rod is provided in the flange pipe, and the fixing rod abuts against the end of the valve body. A connecting rod is provided on the fixing rod. A pushing device is provided in the water outlet channel for pushing the connecting rod to slide and thereby driving the flange pipe to slide. A sealing device is provided between the flange pipe and the valve body.

[0007] Further improvement is: The pushing device includes a screw rod. A fixing plate is provided in the water outlet channel. The screw rod rotatably passes through the fixing plate. One end of the screw rod passes through the connecting rod and is in threaded transmission with the connecting rod. The other end of the screw rod is provided with a rotating device for driving the screw rod to rotate. A sliding channel is opened on the flange pipe, and a limiting block is provided on the valve body. The limiting block is located in the sliding channel.

[0008] Further improvement is: The rotating device includes a first worm gear and a first worm. The first worm gear is sleeved on the screw rod. The first worm rotatably passes through the valve body. One end of the first worm is in meshing transmission with the first worm gear. The other end of the first worm passes through the valve body and is provided with a handle.

[0009] Further improvement is: A water hammer prevention device for preventing water hammer is provided in the water inlet channel.

[0010] Further improvements are as follows: The water hammer prevention device includes a baffle. An upper end portion of the inner wall of the water inlet passage is provided with a placement groove. The baffle is arranged in the placement groove. A rotating rod is rotatably arranged in the placement groove. The baffle is sleeved on the rotating rod. A driving device for driving the baffle to rotate is arranged in the valve body.

[0011] Further improvements are as follows: The driving device includes a second worm gear and a second worm. A fixed box is arranged on the valve body. One end of the rotating rod extends into the fixed box. The second worm gear is sleeved on the rotating rod. The second worm penetrates through the fixed box. One end of the second worm is meshed and driven with the second worm gear. The other end of the second worm penetrates out of the fixed box.

[0012] Further improvements are as follows: The baffle is provided with a buffer groove. A buffer rubber layer covering the buffer groove is arranged on the baffle. A buffer member is arranged in the buffer groove.

[0013] Further improvements are as follows: The buffer member is a plurality of springs. The springs are evenly distributed in the buffer groove. One end of each spring is connected to the buffer rubber layer, and the other end of each spring is connected to the inner wall of the buffer groove.

[0014] Further improvements are as follows: A driving wheel is arranged on the second worm.

[0015] By adopting the foregoing technical solutions, the beneficial effects of the present utility model are as follows:

[0016] The structure is simple and easy to disassemble. The flange pipe can slide, so that when the butterfly valve is disassembled, a gap can be generated between the butterfly valve and the pipeline, so that the butterfly valve will not be tightened in the pipeline connection, and thus the butterfly valve can be better removed for maintenance and replacement. When the butterfly valve needs to be installed, the flange pipe extends out, so that the gap in the pipeline connection can be compensated, and thus the pipeline connection can be better carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic cross-sectional view of the highly-sealed and easily-disassembled butterfly valve according to an embodiment of the present utility model.

[0018] Figure 2 is an enlarged schematic view of part A according to an embodiment of the present utility model.

[0019] Figure 3 is a schematic view of the structure of the driving device according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Refer to Figures 1 - 3, what is disclosed in the embodiments of the present utility model is: a high-sealing and easily detachable butterfly valve, including a valve body 1, a valve cover provided on the valve body 1, a water inlet passage 2 and a water outlet passage 3 opened on the valve body 1, and a valve plate 4 provided between the water inlet passage 2 and the water outlet passage 3. A valve rod 5 is provided on the valve body 1. One end of the valve rod 5 is connected to the valve plate 4, and the other end of the valve rod 5 passes through the valve cover. A flange pipe 12 connected to an external pipe is slidably provided at the position of the water outlet passage 3 on the valve body 1. A fixing rod 6 is provided in the flange pipe 12, and the fixing rod 6 abuts against the end of the valve body 1. A connecting rod 7 is provided on the fixing rod 6. A pushing device for pushing the connecting rod 7 to slide and drive the flange pipe 12 to slide is provided in the water outlet passage 3. A sealing ring is provided between the flange pipe 12 and the valve body 1.

[0022] Specifically, the pushing device includes a screw rod 8, a first worm gear 10 and a first worm 11. A fixing plate 9 is provided in the water outlet passage 3. The screw rod 8 is rotatably passed through the fixing plate 9. One end of the screw rod 8 is passed through the connecting rod 7 and is in threaded transmission with the connecting rod 7. A sliding passage is opened on the flange pipe 12. A limiting block 13 is provided on the valve body 1, and the limiting block 13 is located in the sliding passage. The first worm gear 10 is sleeved on the screw rod 8. The first worm 11 is rotatably passed through the valve body 1. One end of the first worm 11 is meshed and driven with the first worm gear 10, and the other end of the first worm 11 passes through the valve body 1 and is provided with a handle. Among them, when in use, when the butterfly valve needs to be removed, rotate the first worm 11. The first worm 11 drives the first worm gear 10 to rotate. The first worm gear 10 drives the screw rod 8 to rotate. The screw rod 8 is in threaded transmission with the connecting rod 7, so that the fixing rod 6 returns to its original position. The return of the fixing rod 6 drives the flange pipe 12 to return to its original position, so that a gap is generated between the butterfly valve and the pipeline, so that the butterfly valve will not be tightened in the pipeline connection, so that the butterfly valve can be better removed for maintenance and replacement. When the butterfly valve needs to be installed, reverse the first worm 11, and it can also drive the flange pipe 12 to extend, so as to compensate for the gap in the pipeline connection, so as to better connect the pipeline.

[0023] In order to prevent the valve plate 4 from being damaged easily due to water hammer hitting the valve plate 4, thereby improving the service life of the valve plate 4, it further includes a baffle 14, a second worm gear 20 and a second worm 21. A placement groove 15 is opened at the upper end of the inner wall of the water inlet passage 2. The baffle 14 is provided in the placement groove 15. A rotating rod 18 is rotatably provided in the placement groove 15. The baffle 14 is sleeved on the rotating rod 18. A fixing box 19 is provided on the valve body 1. One end of the rotating rod 18 extends into the fixing box 19. The second worm gear 20 is sleeved on the rotating rod 18. The second worm 21 is passed through the fixing box 19. One end of the second worm 21 is meshed and driven with the second worm gear 20, and the other end of the second worm 21 passes through the fixing box 19.

[0024] In order to better reduce water hammer, a buffer groove is formed in the baffle 14, and a buffer rubber layer 16 covering the buffer groove is provided on the baffle 14. A plurality of springs 17 are arranged in the buffer groove. The springs 17 are evenly distributed in the buffer groove. One end of each spring 17 is connected to the buffer rubber layer 16, and the other end of each spring 17 is connected to the inner wall of the buffer groove.

[0025] In order to facilitate the rotation of the second worm 21, a driving wheel 22 is provided on the second worm 21.

[0026] Working principle:

[0027] Before closing the butterfly valve, rotate the second worm 21. The second worm 21 drives the second worm gear 20 to rotate. The second worm gear 20 drives the rotating rod 18 to rotate. The rotating rod 18 drives the baffle 14 to turn over, so that the baffle 14 turns into the water inlet channel 2 and is located in front of the valve plate 4, and then close the butterfly valve. The water hammer enters the water inlet channel 2 and first hits on the baffle 14, so that it will not directly hit on the valve plate 4, thereby protecting the valve plate 4 and increasing the service life of the valve plate 4. When opening the butterfly valve, reverse the second screw rod 8 to make the baffle 14 return to the placement groove 15, so that the baffle 14 will not affect the water flow through the water inlet channel 2.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable butterfly valve with high sealing performance, comprising a valve body, a valve cover provided on the valve body, a water inlet channel and a water outlet channel opened on the valve body, and a valve plate provided between the water inlet channel and the water outlet channel. A valve rod is provided on the valve body. One end of the valve rod is connected to the valve plate, and the other end of the valve rod passes through the valve cover. It is characterized in that: A flange pipe connected to an external pipeline is slidably provided at the position of the water outlet channel of the valve body. A fixing rod is arranged inside the flange pipe, and the fixing rod abuts against the end of the valve body. A connecting rod is arranged on the fixing rod. A pushing device for pushing the connecting rod to slide and thus driving the flange pipe to slide is arranged in the water outlet channel. A sealing device is arranged between the flange pipe and the valve body.

2. The high-sealing and easily detachable butterfly valve according to claim 1, characterized in that: The pushing device includes a screw rod. A fixing plate is arranged in the water outlet channel. The screw rod is rotatably arranged on the fixing plate. One end of the screw rod is arranged on the connecting rod and is in threaded transmission with the connecting rod. The other end of the screw rod is provided with a rotating device for driving the screw rod to rotate. A sliding channel is opened on the flange pipe, and a limiting block is arranged on the valve body. The limiting block is located in the sliding channel.

3. The high-sealing and easily detachable butterfly valve according to claim 2, characterized in that: The rotating device includes a first worm gear and a first worm. The first worm gear is sleeved on the screw rod. The first worm is rotatably arranged on the valve body. One end of the first worm is in meshing transmission with the first worm gear. The other end of the first worm passes through the valve body and is provided with a handle.

4. The highly-sealed detachable butterfly valve according to claim 1, wherein: A water hammer prevention device is arranged in the water inlet channel.

5. The highly-sealed and easily-detachable butterfly valve according to claim 4, wherein: The water hammer prevention device includes a baffle plate. A placement groove is opened at the upper end of the inner wall of the water inlet channel. The baffle plate is arranged in the placement groove. A rotating rod is rotatably arranged in the placement groove. The baffle plate is sleeved on the rotating rod. A driving device for driving the baffle plate to rotate is arranged in the valve body.

6. The easily detachable butterfly valve with high sealing performance according to claim 5, characterized in that: The driving device includes a second worm gear and a second worm. A fixing box is arranged on the valve body. One end of the rotating rod extends into the fixing box. The second worm gear is sleeved on the rotating rod. The second worm is arranged through the fixing box. One end of the second worm is in meshing transmission with the second worm gear. The other end of the second worm passes through the fixing box.

7. The highly-sealed detachable butterfly valve according to claim 5, characterized in that: The baffle plate is provided with a buffer groove. A buffer rubber layer covering the buffer groove is arranged on the baffle plate. A buffer member is arranged in the buffer groove.

8. The highly-sealed detachable butterfly valve according to claim 7, wherein: The buffer member is: a plurality of springs. The springs are evenly arranged in the buffer groove. One end of the spring is connected to the buffer rubber layer, and the other end of the spring is connected to the inner wall of the buffer groove.

9. The highly sealable and easily detachable butterfly valve according to claim 6, wherein: A driving wheel is arranged on the second worm.

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