A detachable connection structure of a butterfly valve plate and a valve rod

Abstract

The utility model relates to a butterfly valve detachable connecting structure, concretely is a butterfly valve valve plate and detachable connecting structure of valve rod, including valve body, the bottom of valve body is provided with the axle seat, is provided with the valve plate body and the axle hole of setting in valve plate body one side in the valve body, the top of valve body is provided with the valve rod body, is provided with the clamping mechanism for assembling to valve rod body in the axle hole, is provided with the axle fixing mechanism in the axle hole, the inside setting of valve rod body has the elastic dismounting mechanism, the elastic dismounting mechanism and clamping mechanism extrusion type cooperation, valve rod body and setting rotation mechanism drive connection in the top of valve body, the utility model discloses through setting up the elastic quick -release structure between valve body, valve body and valve rod, the multi -step dismounting structure of traditional butterfly valve is simplified to realize installation and dismounting through '' one inserts one and presses '', has the advantages that high -efficient, tool -less, is suitable for high -frequency maintenance.

Description

Technical Field

[0001] This utility model relates to a detachable connection structure for a butterfly valve, specifically a detachable connection structure between the valve plate and the valve stem of a butterfly valve. Background Technology

[0002] A butterfly valve is a simple regulating valve whose main function is to connect, disconnect, or regulate the flow of media in pipelines. Its working principle involves using a rotating valve plate to control the opening and closing of the pipeline. When the valve plate rotates to be perpendicular to the pipeline direction, the valve is closed; when the valve plate rotates to be parallel to the pipeline direction, the valve is fully open. In practical applications, butterfly valves can also be partially opened between 0 and 90 degrees to regulate the flow of media in the pipeline, thereby achieving precise control of the media transported in the pipeline system.

[0003] Butterfly valves are mainly used in water supply and drainage systems, fire protection systems, and chemical industries. In some pipelines with corrosive media, the valve plate and valve stem may be corroded or rusted, affecting their strength and sealing performance. In this case, it is necessary to disassemble the old valve stem or valve plate and replace it with a brand new valve plate or valve stem.

[0004] Currently, butterfly valve stems and plates are connected by pins and pins, keys, or bolts. However, when disassembling and assembling the stem and plate using these connection methods, it is necessary to select the appropriate tools (such as pin pullers or torque wrenches) according to the connection type, and to take care to protect the precision and surface quality of the connection parts to avoid secondary damage. The disassembly and assembly are inefficient and require the use of special disassembly tools.

[0005] The existing butterfly valve plate and valve stem are mainly fixed by pins or bolts. However, the method of fixing the valve plate and valve stem by pins or bolts is cumbersome and requires the selection of special disassembly tools according to the connection type, such as loosening the bolts and pulling out the pins. Attention should be paid to protecting the precision and surface quality of the connection parts to avoid secondary damage to the valve stem and valve plate. The disassembly and assembly is inefficient. Utility Model Content

[0006] The purpose of this utility model is to provide a detachable connection structure for the valve plate and valve stem of a butterfly valve, in order to solve the problem mentioned in the background art that the valve plate and valve stem of the butterfly valve are mainly fixed by pins or bolts. However, the method of fixing the valve plate and valve stem by pins or bolts is cumbersome to disassemble and assemble. It is necessary to select special disassembly tools according to the connection type, such as loosening the bolts and pulling out the pins, and to pay attention to protecting the precision and surface quality of the connection parts to avoid secondary damage to the valve stem and valve plate, resulting in low efficiency during disassembly and assembly.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A detachable connection structure for a butterfly valve plate and valve stem includes a valve body, a shaft seat at the bottom of the valve body, a valve plate body and a shaft hole on one side of the valve plate body inside the valve body, a valve stem body at the top of the valve body, a locking mechanism for assembling the valve stem body in the shaft hole, and a coupling fixing mechanism in the shaft hole.

[0009] The valve stem body is provided with an elastic disassembly mechanism, which is in a squeezing fit with the locking mechanism. The valve stem body is connected to a rotating mechanism located on the top of the valve body.

[0010] The detachable connection structure between the butterfly valve plate and the valve stem, as described above, includes two sliding grooves opened in the shaft hole and a first spring disposed in the sliding groove. The first spring is provided with a beveled locking block. A piston sliding block is slidably installed in the shaft hole, and the piston sliding block and the beveled locking block are in a pressing fit.

[0011] As described above, the detachable connection structure between the butterfly valve plate and the valve stem includes two second springs fixedly connected in the shaft hole. The second springs provide an elastic reset effect for the piston sliding block. A convex coupling is provided at the bottom of the piston sliding block, and the convex coupling is inserted into a concave coupling rotatably disposed in the shaft seat.

[0012] The butterfly valve plate and valve stem are detachable connection structures as described above: the elastic disassembly mechanism includes a pressing rod disposed in the valve stem body and an angled pressing block disposed at the bottom of the pressing rod, and the bottom of the valve stem body is provided with two slots.

[0013] The detachable connection structure between the butterfly valve plate and the valve stem, as described above, includes an elastic disassembly mechanism that further includes a sloping push block that slides within the slot and a third spring located on one side of the sloping push block. The sloping extrusion block engages with the two sloping push blocks in a pressing manner.

[0014] The butterfly valve plate and valve stem are detachably connected as described above: the two inclined blocks cooperate with the slot, and the valve stem body is inserted into the shaft hole from the top and bottom.

[0015] The detachable connection structure between the valve plate and the valve stem of the butterfly valve as described above: the rotating mechanism includes a rotating handle located on the top of the valve body and a bevel gear transmission mechanism located on one side of the rotating handle, wherein the bevel gear transmission mechanism is inserted into the valve stem body in an upper and lower manner.

[0016] Compared with the prior art, the beneficial effects of this utility model are: by setting an elastic quick-release structure between the valve body, valve stem and valve body, it is possible to disassemble and assemble in one step, simplifying the multi-step disassembly and assembly structure of the traditional butterfly valve to installation and disassembly by "one insertion and one press", which has the advantages of high efficiency, tool-free operation and suitability for high-frequency maintenance.

[0017] After the valve stem is inserted into the shaft hole of the valve plate, the convex coupling inside the shaft hole of the valve plate will connect with the concave coupling at the bottom of the valve body, so that the valve body, valve plate and valve stem can be installed together in one step, achieving efficient assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the detachable connection between the valve plate and the valve stem of a butterfly valve.

[0019] Figure 2 This is a cross-sectional view of the valve plate body and valve stem body in the detachable connection structure of a butterfly valve.

[0020] Figure 3 This is a cross-sectional view of the rotating mechanism, valve plate body, and valve stem body in the detachable connection structure of a butterfly valve's valve plate and stem.

[0021] Figure 4 This is a cross-sectional view of the valve plate body in the detachable connection structure between the valve plate and the valve stem of a butterfly valve.

[0022] Figure 5 In the detachable connection structure of the butterfly valve plate and valve stem Figure 4 Enlarged structural diagram of section A.

[0023] Figure 6 This is a cross-sectional view of the valve plate body in the detachable connection structure between the valve plate and the valve stem of a butterfly valve.

[0024] Figure 7 In the detachable connection structure of the butterfly valve plate and valve stem Figure 6 Enlarged structural diagram of section B.

[0025] Figure 8 This is a schematic diagram of the disassembly structure of the valve plate body and valve stem body in the detachable connection structure of the butterfly valve plate and valve stem.

[0026] Figure 9 This is a schematic diagram of the valve stem body and rotating mechanism in the detachable connection structure between the valve plate and valve stem of a butterfly valve.

[0027] Figure 10 This is a schematic diagram of the rotating mechanism in the detachable connection structure between the valve plate and the valve stem of a butterfly valve.

[0028] In the diagram: 1. Valve body; 2. Shaft seat; 3. Valve plate body; 4. Shaft hole; 5. Valve stem body; 6. Bevel gear transmission mechanism; 7. Rotating handle; 8. Slide groove; 9. First spring; 10. Inclined edge retaining block; 11. Piston sliding block; 12. Second spring; 13. Convex coupling; 14. Concave coupling; 15. Pressing rod; 16. Angled pressing block; 17. Groove; 18. Inclined edge push block; 19. Third spring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Please see Figures 1-10 As an embodiment of the present utility model, the detachable connection structure between the butterfly valve plate and the valve stem includes a valve body 1, a shaft seat 2 is provided at the bottom of the valve body 1, a valve plate body 3 and a shaft hole 4 provided on one side of the valve plate body 3 are provided inside the valve body 1, a valve stem body 5 is provided at the top of the valve body 1, a locking mechanism for assembling the valve stem body 5 is provided in the shaft hole 4, and a coupling fixing mechanism is provided in the shaft hole 4.

[0031] The valve stem body 5 is provided with an elastic disassembly mechanism, which is in a squeezing fit with the locking mechanism. The valve stem body 5 is connected to the rotating mechanism located on the top of the valve body 1.

[0032] In this embodiment, during installation, the valve plate body 3 is placed into the valve body 1, and the shaft seat 2 is aligned with the upper and lower holes of the valve body 1. Then, the valve stem body 5 is inserted into the shaft hole 4 of the valve plate body 3. At this time, the valve stem body 5 is fixed in the shaft hole 4 of the valve plate body 3 by the locking mechanism. At the same time, the coupling fixing mechanism is squeezed to the bottom as the valve stem body 5 is installed, so that the shaft hole 4 of the valve plate body 3 and the valve body 1 are assembled.

[0033] As a further embodiment of this utility model, the engaging mechanism includes two sliding grooves 8 formed in the shaft hole 4 and a first spring 9 disposed in the sliding groove 8. The first spring 9 is provided with a beveled locking block 10. A piston sliding block 11 is slidably installed in the shaft hole 4, and the piston sliding block 11 and the beveled locking block 10 are in a pressing engagement.

[0034] In this embodiment, the inclined edge block 10 slides in the slide groove 8, the first spring 9 performs the function of elastically resetting the inclined edge block 10, the piston sliding block 11 slides in the shaft hole 4, and the bottom of the piston sliding block 11 is provided with an inclined edge. The inclined edge block 10 fits against the inclined edge at the bottom of the piston sliding block 11. When the piston sliding block 11 moves downward, it will squeeze the two inclined edge blocks 10 to both sides, so that the inclined edge blocks 10 slide into the slide groove 8.

[0035] As a further embodiment of this utility model, the coupling fixing mechanism includes two second springs 12 fixedly connected in the shaft hole 4. The second springs 12 provide an elastic reset effect for the piston sliding block 11. A convex coupling 13 is provided at the bottom of the piston sliding block 11. The convex coupling 13 is inserted into a concave coupling 14 rotatably disposed in the shaft seat 2.

[0036] In this embodiment, a second spring 12 is provided below the piston sliding block 11. The second spring 12 can provide elastic reset function for the piston sliding block 11. The convex coupling 13 and the concave coupling 14 are inserted into each other vertically.

[0037] As a further embodiment of this utility model, the elastic disassembly mechanism includes a pressing rod 15 disposed inside the valve stem body 5 and an angled pressing block 16 disposed at the bottom of the pressing rod 15, and the bottom of the valve stem body 5 is provided with two slots 17.

[0038] In this embodiment, the pressing rod 15 slides within the valve stem body 5, and the angled pressing block 16 is disposed at the bottom of the pressing rod 15.

[0039] As a further embodiment of this utility model, the elastic disassembly mechanism further includes a beveled push block 18 that slides in the slot 17 and a third spring 19 disposed on one side of the beveled push block 18, wherein the beveled pressing block 16 is in a pressing fit with the two beveled push blocks 18.

[0040] In this embodiment, the inclined push block 18 slides in the slot 17, the third spring 19 cooperates with the inclined push block 18, the third spring 19 provides the inclined push block 18 with elastic reset function, and the two inclined push blocks 18 respectively cooperate with the two inclined extrusion blocks 16 in an extrusion manner.

[0041] As a further embodiment of this utility model, the two inclined blocks 10 cooperate with the slot 17, and the valve stem body 5 is inserted into the shaft hole 4 in an upper and lower manner.

[0042] In this embodiment, the inclined block 10 and the slot 17 slide together, the shaft hole 4 is designed in an arc shape, and the lower half of the valve stem body 5 is designed in an arc shape, so that the valve stem body 5 and the shaft hole 4 are inserted into each other. When the valve stem body 5 rotates, it can drive the valve plate body 3 to rotate through the shaft hole 4.

[0043] As a further embodiment of this utility model, the rotating mechanism includes a rotating handle 7 disposed on the top of the valve body 1 and a bevel gear transmission mechanism 6 disposed on one side of the rotating handle 7, wherein the bevel gear transmission mechanism 6 is inserted into the valve stem body 5 in an upper and lower manner.

[0044] In this embodiment, when assembling the valve body 1, valve plate body 3, and valve stem body 5, the valve plate body 3 is first placed into the valve body 1, and the shaft seat 2 is aligned with the upper and lower holes of the valve body 1. Then, the valve stem body 5 is inserted into the shaft hole 4 of the valve plate body 3. Subsequently, the bottom of the valve stem body 5 presses the piston sliding block 11 downward. At this time, the piston sliding block 11 presses the two inclined locking blocks 10 into the sliding groove 8. Then, the piston sliding block 11 continues to move downward, and the slots 17 on both sides of the valve stem body 5 meet the two inclined locking blocks 10, so that the two inclined locking blocks 10 are locked into the slots 17, thereby fixing the valve stem body 5. At the same time, the piston sliding block 11 will drive the convex coupling 13 to move downward. The movement causes the convex coupling 13 to be inserted into the concave coupling 14 at the bottom of the valve body 1, connecting the valve plate body 3 to the valve body 1. This allows for the one-step installation of the valve body 1, valve plate body 3, and valve stem body 5, achieving efficient assembly. When disassembly is required, the pressing rod 15 is pressed down, causing the two inclined side blocks 10 to push the two inclined side push blocks 18 into the slot 17, thereby squeezing the two inclined side blocks 10 out of the slot 17 and causing the valve plate body 3 to lose its fixation. At this time, the second spring 12 immediately pops out, driving the piston sliding block 11 to move upward and reset. At this time, the convex coupling 13 at the bottom will move out from above the concave coupling 14 at the bottom of the valve body 1, achieving one-step disassembly.

[0045] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A detachable connection structure between the valve plate and the valve stem of a butterfly valve, comprising a valve body (1), characterized in that, The bottom of the valve body (1) is provided with a bearing seat (2), the valve body (1) is provided with a valve plate body (3) and a shaft hole (4) provided on one side of the valve plate body (3), the top of the valve body (1) is provided with a valve stem body (5), the shaft hole (4) is provided with a locking mechanism for assembling the valve stem body (5), and the shaft hole (4) is provided with a coupling fixing mechanism. The valve stem body (5) is provided with an elastic disassembly mechanism, which is in a squeezing fit with the locking mechanism. The valve stem body (5) is connected to the rotating mechanism located on the top of the valve body (1) for transmission.

2. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 1, characterized in that, The engaging mechanism includes two grooves (8) opened in the shaft hole (4) and a first spring (9) set in the groove (8). A beveled locking block (10) is provided on the first spring (9). A piston sliding block (11) is slidably installed in the shaft hole (4). The piston sliding block (11) and the beveled locking block (10) are engaged by compression.

3. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 2, characterized in that, The coupling fixing mechanism includes two second springs (12) fixedly connected in the shaft hole (4). The second springs (12) provide elastic reset effect for the piston sliding block (11). A convex coupling (13) is provided at the bottom of the piston sliding block (11). The convex coupling (13) is inserted into a concave coupling (14) rotatably disposed in the shaft seat (2).

4. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 3, characterized in that, The elastic disassembly mechanism includes a pressing rod (15) disposed in the valve stem body (5) and an angled squeezing block (16) disposed at the bottom of the pressing rod (15). The bottom of the valve stem body (5) is provided with two slots (17).

5. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 4, characterized in that, The elastic disassembly mechanism also includes a beveled push block (18) that slides in the slot (17) and a third spring (19) disposed on one side of the beveled push block (18). The beveled extrusion block (16) is in a pressing fit with the two beveled push blocks (18).

6. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 5, characterized in that, The two inclined blocks (10) are engaged with the slot (17), and the valve stem body (5) is engaged with the shaft hole (4) in an upper and lower insertion manner.

7. The detachable connection structure between the valve plate and the valve stem of a butterfly valve according to claim 6, characterized in that, The rotating mechanism includes a rotating handle (7) located on the top of the valve body (1) and a bevel gear transmission mechanism (6) located on one side of the rotating handle (7). The bevel gear transmission mechanism (6) is engaged with the valve stem body (5) in an upper and lower plug-in manner.

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