A butterfly valve with removable valve plate

Abstract

The utility model relates to the field of butterfly valve, concretely relates to a butterfly valve of detachable valve plate, including valve body and valve plate, the valve plate is located the valve body inside side, the valve body with valve plate is connected by stem penetration, the both ends of stem are equipped with handle and pulley structure respectively. Stem connects valve body and valve plate by penetration, is fixed by pulley structure, and the dismounting and replacement of valve plate are convenient. When replacing valve plate, can draw out stem and replace valve plate only by dismounting pulley structure, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, specifically to a butterfly valve with a detachable valve plate. Background Technology

[0002] A butterfly valve is a type of valve whose closing element (valve disc or butterfly plate) is a disc that rotates around a valve shaft to open and close. Its opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve the purpose of opening, closing, or regulation. With increasing service life, the valve plate accumulates more and more dirt, eventually failing to close completely, requiring valve replacement. To minimize maintenance and butterfly valve procurement costs, a technology for convenient valve plate replacement needs to be developed.

[0003] For example, Chinese patent CN109826965B discloses a butterfly valve and an online quick-change assembly method for the valve plate. The butterfly valve includes a valve body and a valve plate assembly. The valve body has a medium inlet and a medium outlet on opposite sides. The top of the valve body has a maintenance window, and the bottom of the valve body has a lower end cover. The valve plate assembly is inserted into the valve body through the maintenance window, with the lower end of the valve plate assembly pressing against the lower end cover. The upper end cover is connected to the upper end of the valve plate assembly and presses down on the valve plate assembly, restricting its vertical movement within the valve body. The assembly method includes the following steps: preparing and cleaning all components of the valve to be assembled; assembling the new valve plate assembly; disassembling the old valve plate assembly; and inserting the new valve plate assembly into the valve body from the top. This invention enables rapid assembly of the valve assembly, improving assembly efficiency. The drawback is that when replacing the valve plate, the entire valve assembly needs to be disassembled and the valve plate replaced, which is a rather cumbersome operation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a butterfly valve that allows the valve plate to be removed simultaneously with the valve stem, making operation simpler and more convenient.

[0005] To achieve the above-mentioned technical effects, this utility model proposes:

[0006] A butterfly valve with a detachable valve plate includes a valve body and a valve plate, the valve plate being located on the inner side of the valve body, the valve body and the valve plate being connected by a valve stem, and the valve stem having a handle and a pulley structure at both ends respectively.

[0007] The valve stem connects the valve body and the valve plate, and is secured by a pulley structure, facilitating the removal and replacement of the valve plate. To replace the valve plate, simply remove the pulley structure to pull out the valve stem; the operation is simple and convenient.

[0008] The valve stem is provided with a limiting plate along the rod body. The valve body is provided with a limiting plate perforation and a valve body through hole which are arranged oppositely. The limiting plate hole is arranged corresponding to the shape of the limiting plate. The through hole of the valve plate has a limiting groove, and the limiting groove is arranged corresponding to the limiting plate.

[0009] The limiting plate perforation extends towards the outside of the valve body to form an opening and closing limiter.

[0010] The cross-section of the limiting plate is in the shape of "one" or "plus".

[0011] The limiting plate is penetrated by fastening screws, and the fastening screws penetrate through the limiting groove and the limiting plate.

[0012] The handle is provided with a spring switch, and the spring switch cooperates with the opening and closing limiter.

[0013] The pulley structure includes a bearing and a fixing structure. The fixing structure is located at the end of the valve stem. The bearing is located between the fixing structure and the valve body, and the bearing is in close cooperation with both the fixing structure and the valve body.

[0014] The handle has a switch groove. The spring switch is in a V shape and the bent part is rotatably connected in the switch groove. The spring switch includes a pressing part and a limiting part. A spring is arranged between the pressing part and the switch groove, and the limiting part cooperates with the opening and closing limiter.

[0015] The opening and closing limiter is provided with a plurality of opening degree grooves along the axial side. The limiting part is provided with a hook, and the hook is arranged corresponding to the shape of the opening degree grooves.

[0016] The beneficial effects of the present utility model are:

[0017] The present utility model can realize the convenient disassembly and replacement of the valve plate of the butterfly valve, remove the valve plate while removing the valve stem, and reduce the later maintenance cost and product replacement cost. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the butterfly valve with a detachable valve plate in Embodiment 1.

[0019] Figure 2 It is a structural schematic diagram of the valve stem.

[0020] Figure 3 It is a top view and a bottom view of the valve body.

[0021] Figure 4 It is a structural schematic diagram of the valve plate.

[0022] Figure 5 It is a structural schematic diagram of the valve stem in Embodiment 2.

[0023] Figure 6 This is a schematic diagram of the butterfly valve with a detachable valve plate in Example 3.

[0024] Icon labels:

[0025] 100. Valve body; 200. Valve plate; 300. Valve stem; 400. Pulley structure;

[0026] 101. Limit plate perforation; 102. Valve body through hole; 103. Opening / closing limit switch; 104. Opening groove;

[0027] 201. Limiting groove; 202. Fastening screw;

[0028] 301. Limiting plate; 302. Handle; 303. Spring switch; 304. Switch groove; 305. Pressing part; 306. Limiting part; 307. Spring; 308. Hook;

[0029] 401. Bearing; 402. Fixed structure; Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] This utility model provides a butterfly valve with a detachable valve plate. The preferred embodiments of the butterfly valve with a detachable valve plate are described below.

[0032] Example 1

[0033] Reference Appendix Figures 1 to 4 In this embodiment, the butterfly valve with a detachable valve plate includes a valve body 100 and a valve plate 200. The valve plate 200 is located on the inner side of the valve body 100. The valve body 100 and the valve plate 200 are connected by a valve stem 300. The valve stem 300 has a handle 302 and a pulley structure 400 at each end. The valve stem 300 connects the valve body 100 and the valve plate 200 and is fixed by the pulley structure 400, facilitating the disassembly and replacement of the valve plate 200. When replacing the valve plate 200, only the pulley structure 400 needs to be removed to pull out the valve stem 300 and replace the valve plate 200.

[0034] A limiting plate 301 is provided along the stem of the valve stem 300. The limiting plate 301 is in the shape of an "I". The valve body 100 has a through hole 101 of the limiting plate 301 and a valve body through hole 102, which are arranged opposite to each other. The hole of the limiting plate 301 is arranged in a shape corresponding to the limiting plate 301. The through hole of the valve plate 200 has a limiting groove 201, which is arranged in a corresponding manner to the limiting plate 301. In this embodiment, the cross-section of the limiting plate 301 is in the shape of an "I", and its length is approximately the radius of the valve plate 200. The through hole 101 and the limiting groove 201 of the limiting plate 301 are opened according to the shape of the limiting plate 301. The limiting groove 201 is formed by extending from one end of the through hole of the valve plate 200 to the other end. During the assembly of the valve body 100, valve plate 200, and valve stem 300, the valve plate 200 is placed inside the valve body 100. The other end of the valve stem 300, where the handle 302 is located, is inserted into the through hole 101 of the limiting plate 301, and then into the through hole of the valve plate 200. The limiting plate 301 can pass through the corresponding opening of the through hole 101 and the limiting groove 201. After the limiting plate 301 reaches the bottom of the limiting groove 201, the pulley structure 400 is fixed to complete the installation. The "I"-shaped limiting plate 301 in the middle of the valve stem 300 and the limiting groove 201 on the valve body 100 form circumferential and axial constraints, and the pulley assembly ensures that the valve stem 300 will not come out.

[0035] The limiting plate 301 is positioned on the valve stem 300 close to the handle 302 end to increase the torque generated when the handle 302 is rotated. In some other embodiments, the length of the limiting plate 301 can be set to 1 / 2 to 2 / 3 of the diameter of the valve plate 200, the overall width of the limiting plate 301 can be set to 1 / 20 to 1 / 10 of the diameter of the valve plate 200, and the thickness of the limiting plate 301 can be set to 1 / 10 to 1 / 5 of the thickness of the valve plate 200.

[0036] The limiting plate 301 extends outward from the through hole 101 of the valve body 100 to form an opening and closing limiter 103. The opening and closing limiter 103 has several opening grooves 104 along its axial side, and the limiting part 306 has a hook 308, which corresponds to the shape of the opening groove 104. The handle 302 has a spring switch 303, which cooperates with the opening and closing limiter 103. The handle 302 has a switch groove 304, and the spring switch 303 is V-shaped with its bent portion rotatably connected within the switch groove 304. The spring switch 303 includes a pressing part 305 and a limiting part 306. A spring 307 is provided between the pressing part 305 and the switch groove 304, and the limiting part 306 cooperates with the opening and closing limiter 103.

[0037] The handle 302 is perpendicular to the valve plate 200. Due to the circumferential constraint of the limiting plate 301 on the valve plate 200, the opening and closing angle of the valve plate 200 can be adjusted by rotating the handle 302. The opening and closing limiter 103 cooperates with the spring switch 303 on the handle 302 to limit the opening and closing angle of the valve plate 200. The opening and closing limiter 103 has 15 opening slots 104 on its axial side, that is, one opening slot 104 represents a 24° rotation of the valve plate 200. The opening slots 104 cooperate with the hooks 308 of the spring switch 303 to fix the opening and closing angle of the valve plate 200. The switch groove 304 accommodates the spring switch 303, which serves to guide the spring switch 303 and facilitates actual operation. The spring switch 303 has a limiting latch extending from a limiting portion 306. In its static state, the spring switch 303 is supported by a spring 307, and the pressing portion 305 is pushed out by the spring 307, engaging the limiting latch with one of the opening slots 104. When the opening angle of the valve plate 200 needs to be adjusted, the pressing portion 305 can be pressed with one hand, separating the limiting latch from the opening slot 104. After adjusting the opening angle of the valve plate 200, the pressing portion 305 is lowered, and the latch 308 engages with the next opening slot 104.

[0038] The pulley structure 400 includes a bearing 401 and a fixing structure 402. The fixing structure 402 is located at the end of the valve stem 300, and the bearing 401 is located between the fixing structure 402 and the valve body 100, with the bearing 401 closely fitting the fixing structure 402 and the valve body 100. The fixing structure 402 includes a threaded portion at the end of the valve stem 300 and a fixing nut. After the valve stem 300 is connected to the valve body 100 and the valve plate 200, the bearing 401 is fitted onto the threaded end, and the fixing nut is screwed onto the threaded end to fix the bearing 401, preventing the valve stem 300 from coming off. The bearing 401 can minimize the frictional resistance generated by the rotation of the valve plate 200 and the valve stem 300. When replacing the valve plate 200, the fixing structure 402 can be separated, and the valve stem 300 can be easily pulled out for replacement.

[0039] Example 2

[0040] The butterfly valve with a detachable valve plate in this embodiment includes a valve body 100 and a valve plate 200. The valve plate 200 is located on the inner side of the valve body 100. The valve body 100 and the valve plate 200 are connected by a valve stem 300. The valve stem 300 is provided with a handle 302 and a pulley structure 400 at both ends.

[0041] Reference Appendix Figures 1 to 5The valve stem 300 has a limiting plate 301 along its body, which is shaped like a cross. The valve body 100 has a through hole 101 and a valve body through hole 102 of the limiting plate 301, which are arranged opposite to each other. The hole of the limiting plate 301 corresponds to the shape of the limiting plate 301. The through hole of the valve plate 200 has a limiting groove 201, which corresponds to the limiting plate 301. In this embodiment, the cross-section of the limiting plate 301 is shaped like a cross, and its length is approximately the radius of the valve plate 200. The through hole 101 and the limiting groove 201 of the limiting plate 301 are opened according to the shape of the limiting plate 301, and the limiting groove 201 is formed by extending from one end of the through hole of the valve plate 200 to the other end. During the assembly of the valve body 100, valve plate 200, and valve stem 300, the valve plate 200 is placed inside the valve body 100. The other end of the valve stem 300, where the handle 302 is located, is inserted into the through hole 101 of the limiting plate 301, and then into the through hole of the valve plate 200. The limiting plate 301 can pass through the corresponding opening in the through hole 101 and the limiting groove 201. After the limiting plate 301 reaches the bottom of the limiting groove 201, the pulley structure 400 is fixed to complete the installation. Compared with the straight shape, the "+" shape of the limiting plate 301 increases the contact area between the limiting plate 301 and the valve plate 200 and the torque when rotating the valve plate 200, providing a more balanced torque transmission and reducing local wear.

[0042] Since the cross-shaped limiting groove 201 reduces the actual thickness of the valve plate 200 at that location, it is necessary to limit the length of the limiting plate 301 in the thickness direction of the valve plate 200. The overall length of the limiting plate 301 in the thickness direction of the valve plate 200 is set to 2 / 3 to 3 / 4 of the thickness of the valve plate 200.

[0043] The limiting plate 301 extends outward from the through hole 101 to form an opening and closing limiter 103. The opening and closing limiter 103 is provided with a plurality of opening grooves 104 along the axial side, and the limiting part 306 is provided with a hook 308, which is configured to correspond to the shape of the opening groove 104.

[0044] The handle 302 is perpendicular to the valve plate 200. Due to the circumferential constraint of the limiting plate 301 on the valve plate 200, the opening and closing angle of the valve plate 200 can be adjusted by rotating the handle 302. The opening and closing limiter 103 cooperates with the spring switch 303 on the handle 302 to limit the opening and closing angle of the valve plate 200. The opening and closing limiter 103 has 15 opening slots 104 on its axial side, that is, one opening slot 104 represents a 24° rotation of the valve plate 200. The opening slots 104 cooperate with the hooks 308 of the spring switch 303 to fix the opening and closing angle of the valve plate 200. The switch groove 304 accommodates the spring switch 303, which serves to guide the spring switch 303 and facilitates actual operation. The spring switch 303 has a limiting latch extending from a limiting portion 306. When the spring switch 303 is in a static state, it is supported by a spring 307. The pressing portion 305 is pushed out by the spring 307, and the limiting latch engages with one of the opening slots 104.

[0045] The pulley structure 400 includes a bearing 401 and a fixing structure 402. The fixing structure 402 is located at the end of the valve stem 300, and the bearing 401 is located between the fixing structure 402 and the valve body 100, with the bearing 401 closely fitting the fixing structure 402 and the valve body 100. The fixing structure 402 includes a threaded portion at the end of the valve stem 300 and a fixing nut. After the valve stem 300 is connected to the valve body 100 and the valve plate 200, the bearing 401 is fitted onto the threaded end, and the fixing nut is screwed onto the threaded end to fix the bearing 401, preventing the valve stem 300 from coming off. The bearing 401 can minimize the frictional resistance generated by the rotation of the valve plate 200 and the valve stem 300.

[0046] Example 3

[0047] Reference Appendix Figures 2 to 6 In this embodiment, the butterfly valve with a detachable valve plate includes a valve body 100 and a valve plate 200. The valve plate 200 is located on the inner side of the valve body 100. The valve body 100 and the valve plate 200 are connected by a valve stem 300. The valve stem 300 is provided with a handle 302 and a pulley structure 400 at both ends.

[0048] A limiting plate 301 is provided along the stem of the valve stem 300. The limiting plate 301 is in the shape of an "I". The valve body 100 has a through hole 101 of the limiting plate 301 and a valve body through hole 102, which are arranged opposite to each other. The hole of the limiting plate 301 is arranged in a shape corresponding to the limiting plate 301. The through hole of the valve plate 200 has a limiting groove 201, which is arranged in a corresponding manner to the limiting plate 301. In this embodiment, the cross-section of the limiting plate 301 is in the shape of an "I", and its length is approximately the radius of the valve plate 200. The through hole 101 and the limiting groove 201 of the limiting plate 301 are opened according to the shape of the limiting plate 301. The limiting groove 201 is formed by extending from one end of the through hole of the valve plate 200 to the other end. During the assembly of the valve body 100, valve plate 200, and valve stem 300, the valve plate 200 is placed inside the valve body 100. The other end of the valve stem 300, where the handle 302 is located, is inserted into the through hole 101 of the limiting plate 301, and then into the through hole of the valve plate 200. The limiting plate 301 can pass through the corresponding opening of the through hole 101 and the limiting groove 201. After the limiting plate 301 reaches the bottom of the limiting groove 201, the pulley structure 400 is fixed to complete the installation. The "I"-shaped limiting plate 301 in the middle of the valve stem 300 and the limiting groove 201 on the valve body 100 form circumferential and axial constraints, and the pulley assembly ensures that the valve stem 300 will not come out.

[0049] Fastening screws 202 are inserted through the surface of the limiting plate 301, passing through the limiting groove 201 and the limiting plate 301. To further ensure the connection stability between the valve stem 300 and the valve plate 200, two through holes are opened along the length direction on both sides of the limiting plate 301, and four corresponding through holes are opened on the surface of the valve plate 200. After the valve stem 300 and the valve plate 200 are connected through, fastening bolts 202 can be inserted through the four holes and nuts can be screwed in to further improve the connection stability between the valve stem 300 and the valve plate 200. However, this setting requires the four bolts to be removed before disassembling the valve plate 200.

[0050] The limiting plate 301 extends outward from the through hole 101 to form an opening and closing limiter 103. The opening and closing limiter 103 has several opening grooves 104 along its axial side, and the limiting part 306 is provided with a hook 308, which is correspondingly set in shape to the opening grooves 104. The handle 302 is provided with a spring switch 303, which cooperates with the opening and closing limiter 103.

[0051] The handle 302 is perpendicular to the valve plate 200. Due to the circumferential constraint of the limiting plate 301 on the valve plate 200, the opening and closing angle of the valve plate 200 can be adjusted by rotating the handle 302. The opening and closing limiter 103 cooperates with the spring switch 303 on the handle 302 to limit the opening and closing angle of the valve plate 200. The opening and closing limiter 103 has 15 opening slots 104 on its axial side, that is, one opening slot 104 represents a 24° rotation of the valve plate 200. The opening slots 104 cooperate with the hooks 308 of the spring switch 303 to fix the opening and closing angle of the valve plate 200. The switch groove 304 accommodates the spring switch 303, which serves to guide the spring switch 303 and facilitates actual operation. The spring switch 303 has a limiting latch extending from a limiting portion 306. When the spring switch 303 is in a static state, it is supported by a spring 307. The pressing portion 305 is pushed out by the spring 307, and the limiting latch engages with one of the opening slots 104.

[0052] The pulley structure 400 includes a bearing 401 and a fixing structure 402. The fixing structure 402 is located at the end of the valve stem 300, and the bearing 401 is located between the fixing structure 402 and the valve body 100, with the bearing 401 closely fitting the fixing structure 402 and the valve body 100. The fixing structure 402 includes a threaded portion at the end of the valve stem 300 and a fixing nut. After the valve stem 300 is connected to the valve body 100 and the valve plate 200, the bearing 401 is fitted onto the threaded end, and the fixing nut is screwed onto the threaded end to fix the bearing 401, preventing the valve stem 300 from coming off. The bearing 401 can minimize the frictional resistance generated by the rotation of the valve plate 200 and the valve stem 300.

[0053] This invention enables convenient replacement of the butterfly valve plate, reducing subsequent maintenance and product replacement costs.

[0054] The above description is a preferred embodiment of the present utility model, used to illustrate the present utility model and its effects. It should be noted that, for those skilled in the art, for the purpose of making foreseeable improvements and modifications without departing from the principles of the present utility model, such improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A butterfly valve with removable valve plate, characterized in that, It includes a valve body and a valve plate. The valve plate is located on the inner side of the valve body. The valve body and the valve plate are connected through a valve rod, and a handle and a pulley structure are respectively provided at both ends of the valve rod.

2. A butterfly valve according to claim 1, wherein A limiting plate is provided along the rod body of the valve rod. The valve body is provided with a limiting plate through hole and a valve body through hole arranged oppositely. The limiting plate hole is arranged corresponding to the shape of the limiting plate. The through hole of the valve plate has a limiting groove, and the limiting groove is arranged corresponding to the limiting plate.

3. A butterfly valve according to claim 2, wherein, The limiting plate through hole extends towards the outside of the valve body to form an opening and closing limiter.

4. A butterfly valve according to any one of claims 2 or 3, wherein, The cross-section of the limiting plate is in the shape of "one" or "ten".

5. A butterfly valve according to claim 4, wherein, A fastening screw is penetrated through the plate surface of the limiting plate, and the fastening screw penetrates through the limiting groove and the limiting plate.

6. A butterfly valve according to claim 3, wherein The handle is provided with a spring switch, and the spring switch cooperates with the opening and closing limiter.

7. A butterfly valve according to claim 3, wherein The pulley structure includes a bearing and a fixing structure. The fixing structure is located at the end of the valve rod. The bearing is located between the fixing structure and the valve body, and the bearing is in close cooperation with both the fixing structure and the valve body.

8. A butterfly valve according to claim 6, wherein, The handle has a switch groove. The spring switch is in a V shape and the bent part is rotatably connected in the switch groove. The spring switch includes a pressing part and a limiting part. A spring is arranged between the pressing part and the switch groove, and the limiting part cooperates with the opening and closing limiter.

9. A butterfly valve according to claim 8, wherein, The opening and closing limiter is provided with a plurality of opening degree grooves along the axial side. The limiting part is provided with a hook, and the hook is arranged corresponding to the shape of the opening degree grooves.

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