Structure for preventing valve rod of butterfly valve from popping up

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a structure for preventing a valve rod of a butterfly valve from popping up, which comprises a valve body, a valve plate and the valve rod, the valve rod is vertically and rotatably connected to the middle position of the valve body, the valve plate is arranged on the side edge of the valve rod inside the valve body, an arc groove is vertically arranged on the surface of the back of the valve plate, and the valve rod is pressed in the arc groove on the back of the valve plate. Two ring openings are formed in the outer ring of the valve rod in a surrounding mode, and abutting blocks abutting against the ring openings are arranged on the two sides of the arc grooves located at the ring openings. According to the technical scheme, the ring opening is formed in the outer ring of the valve rod in the surrounding mode, and the abutting block abutting against the ring opening is arranged at the arc groove in the ring opening position, so that the fixed hoop is buckled into the ring opening to be locked, the limiting function of up-down sliding can be achieved in the using process, the valve rod is prevented from sliding and popping out, and the service life of the valve rod is prolonged. And a first clamping block arranged in the arc groove and a second clamping block arranged on the inner side of the hoop are clamped into the penetrating opening, so that the locking effect during rotation of the valve rod can be achieved, and it is ensured that the valve plate can be smoothly driven to rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a structure for preventing a butterfly valve stem from popping out. Background Art

[0002] A butterfly valve, also known as a flap valve or butterfly valve, is a simple regulating valve. Its operating principle is to rotate the valve stem through a transmission mechanism, which in turn drives the disc-shaped butterfly plate to rotate around its own axis within the valve body, opening and closing the valve or regulating flow. Butterfly valves feature low operating torque, compact installation space, light weight, and simple and rapid operation. They are widely used in piping systems in industries such as chemical, petroleum, natural gas, food, pharmaceuticals, metallurgy, and water treatment. Butterfly valves offer a variety of actuation methods, including manual, electric, and pneumatic actuators, depending on the operating conditions.

[0003] The butterfly valve stem is fixed to the rear end of the valve plate and locked by a connector. Due to frequent opening and closing, the connector that fixes the butterfly valve and the valve stem is easily worn, causing the valve stem to slide and pop out. In addition, when the valve stem rotates, it may slip between the connector and the valve plate, preventing the valve plate from rotating smoothly. Therefore, we propose a structure to prevent the butterfly valve stem from popping out. Utility Model Content

[0004] The purpose of the present utility model is to provide a structure for preventing the valve stem of a butterfly valve from popping out. A ring opening is opened around the outer ring of the valve stem, and a block that contacts the ring opening is provided at the arc groove at the position of the ring opening, so that the fixed clamp is also buckled into the ring opening and locked. When in use, it can have an up and down sliding limit to prevent the valve stem from sliding and popping out, and the first clamping block provided in the arc groove and the second clamping block on the inner side of the clamp are clamped into the through opening, which can realize the locking effect when the valve stem is rotated, ensuring that the valve plate can be driven to rotate smoothly, and solving the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure for preventing the valve stem of a butterfly valve from popping out, comprising a valve body, a valve plate and a valve stem, the valve stem being vertically rotatably connected to the middle position of the valve body, and the bottom of the valve stem being inserted into the valve body, and the valve plate being placed on the side of the valve stem inside the valve body; an arc groove is vertically provided on the back surface of the valve plate, and the valve stem is pressed into the arc groove on the back of the valve plate, and two ring openings are provided around the outer ring of the valve stem, and blocks that abut against the ring openings are provided on both sides of the arc groove at the ring openings, and the outer ring of the valve stem at the ring opening position is locked with a clamp on the back surface of the valve plate by bolts, and the clamp is buckled in the ring opening of the valve stem; a through-opening is provided on the surface of the valve stem at the ring opening, and a first clamping block and a second clamping block that penetrate into the through-opening are respectively fixed on the arc groove surface and the inner surface of the clamp at the through-opening.

[0006] By adopting the above technical solution, after the valve body is installed in place, the turning handle is used to drive the valve stem to rotate and drive the valve plate to rotate, so as to realize the opening or closing of the valve body. During use, the first clamping block and the second clamping block are buckled into the through-opening, which can play a role in limiting and ensuring the rotation of the valve plate. The stop block and the clamp are both buckled in the ring mouth, which can play an upper and lower limit role on the valve stem to prevent it from sliding and popping out during use.

[0007] Optionally, screw holes are provided on the surfaces of the valve plates on both sides of the arc groove at the stop block, and bolts are passed through the clamp and screwed into the screw holes to lock the clamp.

[0008] Optionally, a sealing ring is fixed around the outer ring of the valve plate, and the sealing ring is embedded in an annular groove body provided on the outer ring of the valve plate.

[0009] By adopting the above technical solution, when the valve plate is rotated to seal the interior of the valve body, the sealing ring contacts the inner surface of the valve body, achieving a good sealing effect.

[0010] Optionally, both ends of the valve body are connected with flanges, and the flange surfaces are evenly provided with perforations.

[0011] By adopting the above technical solution, the valve body is connected to the pipeline through the flanges at both ends thereof.

[0012] Optionally, a turning handle is installed on the top of the valve stem, and the valve stem can be driven to rotate by the turning handle with little effort.

[0013] Optionally, the length of the clamp is the same as that of the stop block, and both are just snapped into the ring opening.

[0014] By adopting the above technical solution, better limiting of the up and down movement of the valve stem can be achieved.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The technical solution of the present application is to open a ring opening around the outer ring of the valve stem, and to set a block that contacts the ring opening at the arc groove at the position of the ring opening, so that the fixed clamp is also buckled into the ring opening and locked. When in use, it can have an up and down sliding limit to prevent the valve stem from sliding and popping out, and the first clamping block set in the arc groove and the second clamping block on the inside of the clamp are clamped into the through opening, which can realize the locking effect when the valve stem rotates, ensuring that the valve plate can be driven to rotate smoothly.

[0017] 2. The technical solution of this application not only prevents the valve stem from popping out, but also enables it to stably drive the valve plate to rotate and avoid sliding by simultaneously setting a limit structure for sliding up and down between the valve stem and the valve plate, and a locking structure for rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the structure for preventing the butterfly valve stem from popping out of the utility model;

[0020] Figure 2 This is a side view of the structure of the connection between the valve plate and the valve stem of the structure for preventing the butterfly valve stem from popping out of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure between the valve stem and the back of the valve plate after the clamp of the structure for preventing the butterfly valve stem from popping out of the present invention is removed;

[0022] Figure 4 The utility model is a structure for preventing the butterfly valve stem from popping out. Figure 3 Detailed structural diagram of A in FIG;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure at the ring mouth of the structure for preventing the butterfly valve stem from popping out of the present invention.

[0024] In the figure: 1. valve body; 11. flange; 2. valve plate; 21. sealing ring; 22. arc groove; 23. stop block; 24. screw hole; 25. first clamping block; 3. valve stem; 31. handle; 32. ring opening; 321. through-opening; 4. clamp; 41. bolt; 42. second clamping block. DETAILED DESCRIPTION

[0025] See also Figure 1-5 The utility model provides a technical solution: a structure for preventing the valve stem 3 of a butterfly valve from popping out, comprising a valve body 1, a valve plate 2 and a valve stem 3, both ends of the valve body 1 are connected with flanges 11, and the surface of the flange 11 is evenly provided with perforations, so that the valve body 1 can be connected to the pipeline through the valve stem 3 at both ends thereof.

[0026] The valve stem 3 is vertically rotatably connected to the middle position of the valve body 1, and the bottom of the valve stem 3 is inserted into the valve body 1. The valve plate 2 is placed on the side of the valve stem 3 inside the valve body 1. An arc groove 22 is vertically opened on the back surface of the valve plate 2. Then, the part of the valve stem 3 placed inside the valve body 1 is pressed into the arc groove 22 on the back of the valve plate 2. Ring openings 32 are opened around the upper and lower outer rings of the valve stem 3 inside the valve body 1. There are at least two ring openings 32, and both sides of the arc groove 22 at the ring opening 32 are provided with a stop block 23. The stop block 23 is inserted into the ring opening 32. Then, the valve at the position of the ring opening 32 is opened. The outer ring of the rod 3 is buckled with a clamp 4, and screw holes 24 are provided on the surface of the valve plate 2 on both sides of the arc groove 22 at the stop block 23. Then the bolt 41 is passed through the clamp 4 and screwed into the screw hole 24 to lock the clamp 4, lock the clamp 4 on the back surface of the valve plate 2, and buckle the clamp 4 in the ring opening 32 of the valve stem 3. The length of the clamp 4 is the same as that of the stop block 23, and both are just stuck in the ring opening 32. During use, even if there is wear between the valve stem 3 and the valve plate 2, the stop block 23 and the clamp are buckled in the ring opening 32, which can prevent the valve stem 3 from sliding up and down in the arc groove 22, so that the valve stem 3 will not slide and pop out.

[0027] When the valve stem 3 is rotated, the valve plate 2 can be easily loosened and rotated relative to the clamp 4 and the arc groove 22, which makes it impossible to smoothly drive the valve plate 2 to rotate and achieve the purpose of opening and closing. In order to solve this problem, a through-hole 321 is opened on the surface of the valve stem 3 at the ring mouth 32, and a first clamping block 25 is fixed on the surface of the arc groove 22 at the through-hole 321. A second clamping block 42 is fixed on the inner surface of the clamp 4 at the through-hole 321. The first clamping block 25 and the second clamping block 42 are both inserted into the through-hole 321. Therefore, when the valve stem 3 rotates, the first clamping block 25 and the second clamping block 42 can be buckled into the through-hole 321 to drive the valve plate 2 to rotate smoothly and achieve the purpose of opening and closing. In order to improve the sealing effect, a sealing ring 21 is fixed around the outer ring of the valve plate 2. The sealing ring 21 is embedded in the annular groove body provided on the outer ring of the valve plate 2. When the valve plate 2 rotates and closes, the sealing ring 21 contacts the inner surface of the valve body 1 to achieve the purpose of good sealing.

[0028] A rotating handle 31 is installed on the top of the valve stem 3, and the valve stem 3 can be driven to rotate by the rotating handle 31 with less effort, so that the rotation of the valve plate 2 is more labor-saving.

[0029] When the cam 31 is in operation, the cam 32 is engaged with the piston 24 and the piston 23 is tightened to the piston rod 32 so that the cam 32 is tightened and the piston 23 is tightened.

Claims

1. A structure for preventing a butterfly valve stem from popping out, comprising a valve body (1), a valve plate (2) and a valve stem (3), characterized in that: The valve stem (3) is vertically rotatably connected to the middle position of the valve body (1), and the bottom of the valve stem (3) penetrates into the valve body (1), and the valve plate (2) is placed on the side of the valve stem (3) inside the valve body (1); The back surface of the valve plate (2) is vertically provided with an arc groove (22), and the valve stem (3) is pressed into the arc groove (22) on the back of the valve plate (2). Two ring openings (32) are provided around the outer ring of the valve stem (3), and both sides of the arc groove (22) at the ring openings (32) are provided with abutment blocks (23) that abut against the ring openings (32). The outer ring of the valve stem (3) at the position of the ring openings (32) is locked with a clamp (4) on the back surface of the valve plate (2) by a bolt (41), and the clamp (4) is buckled in the ring openings (32) of the valve stem (3); A through opening (321) is provided on the surface of the valve stem (3) at the ring opening (32), and a first clamping block (25) and a second clamping block (42) which penetrate into the through opening (321) are fixed to the surface of the arc groove (22) at the through opening (321) and the inner surface of the clamp (4), respectively.

2. The structure for preventing a butterfly valve stem from popping out according to claim 1, characterized in that: Screw holes (24) are provided on the surfaces of the valve plate (2) on both sides of the arc groove (22) at the stop block (23), and the bolts (41) pass through the clamp (4) and are screwed into the screw holes (24) to lock the clamp (4).

3. The structure for preventing a butterfly valve stem from popping out according to claim 1, characterized in that: A sealing ring (21) is fixed around the outer ring of the valve plate (2), and the sealing ring (21) is embedded in an annular groove body provided on the outer ring of the valve plate (2).

4. The structure for preventing a butterfly valve stem from popping out according to claim 1, characterized in that: Both ends of the valve body (1) are connected with flanges (11), and the surface of the flange (11) is evenly provided with perforations.

5. The structure for preventing a butterfly valve stem from popping out according to claim 1, characterized in that: A rotating handle (31) is installed on the top of the valve stem (3), and the valve stem (3) can be driven to rotate with ease through the rotating handle (31).

6. The structure for preventing a butterfly valve stem from popping out according to claim 1, characterized in that: The length of the clamp (4) is the same as that of the stop block (23), and both are just inserted into the ring opening (32).

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