Butterfly valve

Abstract

The utility model discloses a butterfly valve, which relates to the technical field of butterfly valves, and comprises a butterfly valve body, a valve connecting disc is arranged right above the butterfly valve body, a sealing dismounting mechanism is arranged at the top end of the butterfly valve body, and the sealing dismounting mechanism opens the top end of the butterfly valve body. The butterfly valve body and the rotating valve shaft are detached, the sealing rings are replaced, a distance adjusting mechanism is arranged in the butterfly valve body, the distance adjusting mechanism adjusts the positioning distance according to the diameter of the butterfly valve element, and then the strength of the valve element in the rotating and sealing process is improved. A pressing plate is installed on a flange connected with a butterfly valve and a driving mechanism, the pressing plate is connected with the flange through a screw, a sealing groove is designed in the middle of the pressing plate, the pressing plate and a valve rod are sealed through an O-shaped ring, and meanwhile radial sealing between the pressing plate and the flange connected with the valve and axial sealing between the pressing plate and the valve rod are achieved.

Description

Technical Field

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

[0002] A butterfly valve is a pipeline valve, which is generally composed of a valve body, a valve shaft and a valve plate. A handwheel or a drive mechanism is connected to the top of the valve shaft to adjust the relative position between the valve body and the valve shaft to control the angular orientation of the valve plate inside the valve body.

[0003] Generally, when the valve shaft and valve plate are installed, they are fixed with sealing rings to prevent leakage when the butterfly valve is in use. Once leakage occurs at the valve stem seal, it cannot be eliminated by adjusting the tightening force of the packing gland bolts like conventional valves. The leakage problem of the valve stem of this type of butterfly valve is usually solved by replacing the valve as a whole or dismantling and replacing the seals. However, such treatment methods require the valve to be shut down, affecting production. Summary of the invention

[0004] The purpose of the utility model is to provide a butterfly valve to solve the above-mentioned defects caused by the prior art.

[0005] A butterfly valve comprises a butterfly valve body, a valve connection plate is arranged directly above the butterfly valve body, a sealing disassembly mechanism is arranged at the top of the butterfly valve body, the sealing disassembly mechanism opens the top of the butterfly valve body, and then the butterfly valve body and the rotating valve shaft are disassembled and the sealing ring is replaced, and a distance adjustment mechanism is arranged inside the butterfly valve body, and the distance adjustment mechanism adjusts the positioning distance according to the diameter of the butterfly valve core, thereby improving the strength of the valve core during rotation and sealing.

[0006] Preferably, the sealing disassembly mechanism includes a pressure plate, a pipe flange, bolts, an outer groove and a sealing rubber gasket. The pressure plate is arranged at the top of the valve connecting plate, the outer side of the pressure plate is connected through bolts, the bottom end of the pressure plate is provided with an outer groove, the outer side of the outer groove is connected to a sealing rubber gasket, and pipe flanges are provided on both sides of the left and right sides of the butterfly valve body.

[0007] Preferably, the butterfly valve body is connected to the output end of the driving motor via a through-connected valve shaft.

[0008] Preferably, the distance adjusting mechanism includes a butterfly valve core, a valve shaft, a valve sealing ring, a guide groove, a valve positioning sleeve and a positioning hole. The outer side of the butterfly valve core is fitted with a valve sealing ring, one side of the butterfly valve core is screwed to a valve positioning sleeve, the outer side of the valve positioning sleeve is connected to the valve shaft, the outer side of the valve shaft is symmetrically provided with guide grooves, and positioning holes are symmetrically opened on both sides of the valve positioning sleeve.

[0009] Preferably, the valve shaft is connected to one side of the butterfly valve core through a valve positioning sleeve symmetrically arranged on the outside.

[0010] Preferably, a driving motor is arranged directly above the butterfly valve body.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. Install a pressure plate on the flange connecting the butterfly valve and the drive mechanism. The pressure plate and the flange are connected by screws. A sealing groove is designed in the middle of the pressure plate. The pressure plate and the valve stem are sealed with an O-ring. At the same time, the radial seal between the pressure plate and the valve connection flange and the axial seal between the pressure plate and the valve stem are achieved. In this way, the valve does not need to be disassembled from the pipeline for maintenance, eliminating leakage and ensuring continuous production.

[0013] 2. When positioning valve cores of different diameters, one side of the butterfly valve core is positioned by the valve positioning sleeves symmetrically arranged on both sides. During use, the outer side of the valve positioning sleeve is positioned by the guide grooves arranged on both sides. During use, both sides of the valve positioning sleeve are added for positioning to avoid shaking of the valve positioning sleeve and the valve shaft connection due to changes in liquid flow during the operation of the valve positioning sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0015] Figure 2 It is a front view structural diagram of the butterfly valve body in the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the pressing plate in the utility model from a top view.

[0017] Figure 4 It is a side view structural diagram of the butterfly valve core in the utility model.

[0018] Figure 5 It is a schematic diagram of the top-sectional structure of the valve shaft in the utility model.

[0019] in:

[0020] 1. Butterfly valve body; 2. Seal disassembly mechanism; 3. Pressing plate; 4. Driving motor; 5. Pipe flange; 6. Butterfly valve core; 7. Valve connecting plate; 8. Bolts; 9. External groove; 10. Sealing gasket; 11. Valve shaft; 12. Distance adjustment mechanism; 13. Valve sealing ring; 14. Guide slide; 15. Valve positioning sleeve; 16. Positioning hole. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 5 As shown, a butterfly valve comprises a butterfly valve body 1, a valve connecting plate 7 is arranged directly above the butterfly valve body 1, a sealing disassembly mechanism 2 is arranged at the top of the butterfly valve body 1, the sealing disassembly mechanism 2 opens the top of the butterfly valve body 1, and then the butterfly valve body 1 and the rotating valve shaft 11 are disassembled and the sealing ring is replaced, and a distance adjusting mechanism 12 is arranged inside the butterfly valve body 1, and the distance adjusting mechanism 12 adjusts the positioning distance according to the diameter of the butterfly valve core 6, so as to improve the strength of the valve core during rotation and sealing.

[0023] In this embodiment, the sealing disassembly mechanism 2 includes a pressure plate 3, a pipe flange 5, bolts 8, an outer groove 9 and a sealing gasket 10. The pressure plate 3 is arranged at the top of the valve connecting plate 7. The outer side of the pressure plate 3 is connected with bolts 8. The bottom end of the pressure plate 3 is provided with an outer groove 9. The outer side of the outer groove 9 is connected with a sealing gasket 10. The left and right sides of the butterfly valve body 1 are provided with pipe flanges 5. The top of the butterfly valve body 1 is sealed by the sealing gasket 10, and the top of the butterfly valve body 1 is opened to replace the seal.

[0024] In this embodiment, the butterfly valve body 1 is connected to the output end of the driving motor 4 via a valve shaft 11 that penetrates the valve shaft 11 , and the driving motor 4 drives the valve shaft 11 to rotate, thereby rotating and switching the butterfly valve core 6 .

[0025] In this embodiment, the distance adjusting mechanism 12 includes a butterfly valve core 6, a valve shaft 11, a valve sealing ring 13, a guide groove 14, a valve positioning sleeve 15 and a positioning hole 16. The outer side of the butterfly valve core 6 is fitted with the valve sealing ring 13, one side of the butterfly valve core 6 is screwed with the valve positioning sleeve 15, the outer side of the valve positioning sleeve 15 is connected to the valve shaft 11, the outer side of the valve shaft 11 is symmetrically provided with guide grooves 14, and the two sides of the valve positioning sleeve 15 are symmetrically penetrated with positioning holes 16, and the valve positioning sleeve 15 and the valve shaft 11 are locked through the positioning holes 16.

[0026] In this embodiment, the valve shaft 11 is connected to one side of the butterfly valve core 6 through a valve positioning sleeve 15 symmetrically arranged on the outside, and one side of the butterfly valve core 6 is locked by the valve positioning sleeve 15, so as to facilitate positioning of butterfly valve cores 6 with different diameters.

[0027] In this embodiment, a driving motor 4 is disposed directly above the butterfly valve body 1 , and the driving motor 4 drives the valve shaft 11 to rotate, thereby rotating and switching the butterfly valve core 6 .

[0028] This butterfly valve includes the following work contents in practical application:

[0029] Step 1: The operator first aligns the pipe flanges 5 and the pipe fittings provided on both sides of the butterfly valve body 1, locks the pipe flanges 5 and the pipe fittings with screws, and connects the top of the pressing plate 3 with the output end of the driving motor 4, connects the output end of the driving motor 4 with the top of the valve shaft 11, drives the valve shaft 11 and the butterfly valve core 6 to rotate through the output end of the driving motor 4, and then opens and seals the pipe fittings;

[0030] Step 2: During use, the valve sealing ring 13 is installed on the outside of the butterfly valve core 6, thereby improving the contact sealing between the butterfly valve core 6 and the inside of the butterfly valve body 1, avoiding the hard contact between the butterfly valve body 1 and the butterfly valve core 6 affecting the sealing effect, and the sealing rubber pad 10 is installed inside the outer groove 9, and the outer side of the valve shaft 11 is wrapped by the sealing rubber pad 10 to increase the sealing of the connection of the valve shaft 11, so that the pressure plate 3 and the top of the valve connecting plate 7 are pressure-sealed, and the valve connecting plate 7 and the pressure plate 3 are pressed tightly by the bolt 8;

[0031] Step 3: According to the diameter of the butterfly valve core 6, the operator can pull the valve positioning sleeve 15 to make the valve positioning sleeve 15 slide on the outside of the guide groove 14, adjust the spacing between the two groups of valve positioning sleeves 15, insert the screw into the positioning hole 16, lock the connection between the valve positioning sleeve 15 and the valve shaft 11, and make the valve positioning sleeve 15 close to one side of the butterfly valve core 6, use the driving motor 4 to drive the valve shaft 11 to rotate, and use the valve shaft 11 to drive the butterfly valve core 6 to rotate, so as to open the pipeline and control the flow rate.

[0032] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A butterfly valve, characterized in that: The butterfly valve comprises a butterfly valve body (1), a valve connection plate (7) is arranged directly above the butterfly valve body (1), a sealing disassembly mechanism (2) is arranged at the top of the butterfly valve body (1), the sealing disassembly mechanism (2) opens the top of the butterfly valve body (1), and then disassembles the butterfly valve body (1) and the rotating valve shaft and replaces the sealing ring, and the butterfly valve body (1) is provided with a distance adjustment mechanism (12) inside, and the distance adjustment mechanism (12) adjusts the positioning distance according to the diameter of the butterfly valve core, thereby improving the strength of the valve core during rotation and sealing.

2. A butterfly valve according to claim 1, characterized in that: The sealing disassembly mechanism (2) comprises a pressure plate (3), a pipe flange (5), bolts (8), an outer groove (9) and a sealing rubber pad (10); the pressure plate (3) is arranged at the top end of the valve connecting plate (7); the outer side of the pressure plate (3) is connected with a bolt (8); the bottom end of the pressure plate (3) is provided with an outer groove (9); the outer side of the outer groove (9) is connected with a sealing rubber pad (10); and the left and right sides of the butterfly valve body (1) are provided with pipe flanges (5).

3. A butterfly valve according to claim 1, characterized in that: The butterfly valve body (1) is connected to the output end of the drive motor (4) via a valve shaft (11) that penetrates and connects the valve shaft.

4. A butterfly valve according to claim 1, characterized in that: The distance adjustment mechanism (12) comprises a butterfly valve core (6), a valve shaft (11), a valve sealing ring (13), a guide groove (14), a valve positioning sleeve (15) and a positioning hole (16); the outer side of the butterfly valve core (6) is fittedly connected with the valve sealing ring (13); one side of the butterfly valve core (6) is screwed with the valve positioning sleeve (15); the outer side of the valve positioning sleeve (15) is connected to the valve shaft (11); the outer side of the valve shaft (11) is symmetrically provided with guide grooves (14); and the two sides of the valve positioning sleeve (15) are symmetrically penetrated with positioning holes (16).

5. A butterfly valve according to claim 4, characterized in that: The valve shaft (11) is connected to one side of the butterfly valve core (6) via a valve positioning sleeve (15) symmetrically arranged on the outside.

6. A butterfly valve according to claim 1, characterized in that: A driving motor (4) is arranged directly above the butterfly valve body (1).

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