Butterfly valve

Abstract

The utility model discloses a butterfly valve which comprises the following components: a valve seat which is arranged in a circular ring shape and is provided with an upper mounting seat and a lower mounting seat at the upper end and the lower end respectively; the valve plate is arranged in the valve seat; after the valve rod sequentially penetrates through the lower mounting seat and the valve plate from bottom to top, the upper end of the valve rod is inserted into the upper mounting seat; the driving shaft is vertically and rotatably connected to the upper mounting seat, and a plug for inserting the valve rod is arranged at the lower end of the driving shaft; and the actuator is arranged on the upper mounting seat and is connected with the driving shaft. The utility model has the following advantages and effects: by arranging the valve rod which is reversely mounted from bottom to top, when the valve plate is damaged, the valve plate can be disassembled and assembled only by disassembling the valve rod without disassembling and assembling other parts, so that the maintenance and replacement process of the valve plate is easier and more convenient.

Description

Technical Field

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

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on-off control of low-pressure pipeline media. A butterfly valve is a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] In the traditional butterfly valve assembly process, it is usually necessary to first install the valve plate into the valve seat, then pass the drive shaft through the valve plate, and finally install the switch or electric actuator. When the valve plate is damaged and needs to be replaced, the actuator must be disassembled first, then the drive shaft, and finally the valve plate can be disassembled. The disassembly and replacement process of the valve plate is cumbersome and complicated, which makes the disassembly and maintenance process of the valve plate very inconvenient and needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a butterfly valve with the effect of convenient replacement of the valve plate.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a butterfly valve, comprising:

[0006] The valve seat is arranged in a circular ring shape, and an upper mounting seat and a lower mounting seat are arranged at the upper end and the lower end respectively;

[0007] a valve plate, disposed in the valve seat;

[0008] The valve stem, after passing through the lower mounting seat and the valve plate in sequence from bottom to top, has its upper end inserted into the upper mounting seat;

[0009] A drive shaft is vertically rotatably connected to the upper mounting seat, and a plug for plugging into the valve stem is provided at the lower end;

[0010] The actuator is arranged on the upper mounting seat and connected to the driving shaft.

[0011] In a preferred example, the utility model can be further configured as follows: the valve stem includes a connecting rod, a rotating seat, a pin and a locking mechanism, the connecting rod passes through the lower mounting seat and the valve plate, the rotating seat is rotatably arranged at the lower end of the connecting rod, the lower mounting seat is provided with a groove for the rotating seat to be embedded, the pin passes through the valve plate and is threadedly connected to the connecting rod, and the locking mechanism is used to fix the rotating seat.

[0012] In a preferred example, the utility model can be further configured as follows: the locking mechanism includes a locking rod, a spring and a handle, the locking rod is horizontally slidably connected to both sides of the rotating seat, the inner side wall of the groove is provided with a locking hole for the locking rod to be inserted, the spring is arranged in the rotating seat and is used to push the locking rod to slide outward, and the handle is arranged on the outer wall of the locking rod and passes through the lower end surface of the rotating seat.

[0013] In a preferred example, the utility model can be further configured as follows: the lower end of one of the handles is rotatably connected to a limiting rod, the lower end of the other handle is provided with a limiting groove for the limiting rod to be embedded in, and the limiting rod is respectively provided with baffles and nuts that abut against both sides of the other handle.

[0014] In a preferred example, the utility model can be further configured as follows: a sealing ring for the valve stem to pass through is disposed in both the upper mounting seat and the lower mounting seat.

[0015] In a preferred example, the utility model can be further configured as follows: a sealing sleeve is provided around the outer wall of the valve plate.

[0016] In a preferred example, the present invention can be further configured as follows: a plurality of reinforcing rods are disposed on both sides of the valve plate in a staggered manner horizontally and vertically.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. By setting a reverse-mounted valve stem and installing it from bottom to top, when the valve plate is damaged, only the valve stem needs to be disassembled to disassemble and assemble the valve plate, without disassembling and assembling other parts, making the repair and replacement process of the valve plate easier and more convenient;

[0019] 2. The double locking method is used to realize the rapid installation and fixation of the valve stem, increase the stability of the valve stem during operation, and ensure the stable operation of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 is a schematic diagram of the connection relationship of the embodiment;

[0022] Figure 3 is a schematic structural diagram of a lower mounting seat of an embodiment;

[0023] Figure 4 Schematic diagram of the locking mechanism of the embodiment.

[0024] Figure numerals: 1. valve seat; 11. upper mounting seat; 12. lower mounting seat; 13. groove; 2. valve plate; 21. sealing sleeve; 22. reinforcing rod; 3. valve stem; 31. connecting rod; 32. rotating seat; 33. pin; 4. driving shaft; 41. plug; 5. actuator; 6. sealing ring; 7. locking mechanism; 71. locking rod; 72. spring; 73. handle; 74. locking hole; 75. limiting rod; 76. limiting groove; 77. baffle; 78. nut. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 As shown, a butterfly valve comprises a valve seat 1, a valve plate 2, a valve stem 3, a drive shaft 4 and an actuator 5. The valve seat 1 is arranged in a circular ring shape, and an upper mounting seat 11 and a lower mounting seat 12 are arranged at the upper end and the lower end respectively, and the valve plate 2 is arranged in the valve seat 1.

[0027] like Figure 1 , Figure 2 As shown, after the valve stem 3 passes through the lower mounting seat 12 and the valve plate 2 from bottom to top, the upper end is plugged into the upper mounting seat 11. The upper mounting seat 11 and the lower mounting seat 12 are both provided with sealing rings 6 for the valve stem 3 to pass through, so as to improve the sealing performance of the entire butterfly valve.

[0028] like Figure 1 , Figure 2 As shown, the drive shaft 4 is vertically rotatably connected to the upper mounting seat 11, and a plug 41 for plugging the valve stem 3 is provided at the lower end. The cross section of the plug 41 is rectangular, and is used to control the rotation of the valve stem 3. The actuator 5 is arranged on the upper mounting seat 11 and connected to the drive shaft 4.

[0029] Therefore, by setting a reverse-installed valve stem 3 and installing it from bottom to top, when the valve plate 2 is damaged, only the valve stem 3 needs to be disassembled to realize the disassembly and assembly of the valve plate 2, and there is no need to disassemble and assemble other components, thereby making the maintenance and replacement process of the valve plate 2 easier and more convenient.

[0030] like Figure 1 , Figure 2 As shown, the valve stem 3 includes a connecting rod 31, a rotating seat 32, a pin 33 and a locking mechanism 7. The connecting rod 31 passes through the lower mounting seat 12 and the valve plate 2. The rotating seat 32 is rotatably arranged at the lower end of the connecting rod 31. The lower mounting seat 12 is provided with a groove 13 for the rotating seat 32 to be embedded. The pin 33 passes through the valve plate 2 and is threadedly connected to the connecting rod 31.

[0031] like Figure 2 , Figure 3As shown, the locking mechanism 7 is used to fix the rotating seat 32, and the locking mechanism 7 includes a locking rod 71, a spring 72 and a handle 73. The locking rod 71 is horizontally slidably connected to both sides of the rotating seat 32, and the inner side wall of the groove 13 is provided with a locking hole 74 for the locking rod 71 to be inserted. The spring 72 is arranged in the rotating seat 32 and is used to push the locking rod 71 to slide outward. The handle 73 is arranged on the outer wall of the locking rod 71 and passes through the lower end surface of the rotating seat 32.

[0032] like Figure 2 , Figure 3 As shown, the lower end of one of the handles 73 is rotatably connected to a limiting rod 75, and the lower end of the other handle 73 is provided with a limiting groove 76 for the limiting rod 75 to be embedded in. The limiting rod 75 is respectively provided with a baffle 77 and a nut 78 that abut against both sides of the other handle 73.

[0033] When assembling the valve stem 3 and the valve plate 2, the valve plate 2 is embedded in the valve seat 1, and then the valve stem 3 passes through the lower mounting seat 12 and the valve plate 2 from bottom to top, and then the upper end of the valve stem 3 is inserted into the upper mounting seat 11, and the plug 41 on the drive shaft 4 is automatically inserted into the upper end of the valve stem 3.

[0034] During the installation of the valve stem 3, the rotating seat 32 will automatically fit into the groove 13 on the lower mounting seat 12. At this time, the pair of handles 73 are controlled to move closer to each other, so that the locking rod 71 is retracted into the rotating seat 32. After the rotating seat 32 is completely embedded in the groove 13, the handle 73 is released, and at this time, the spring 72 pushes the locking rod 71 to insert into the locking hole 74, so that the entire valve stem 3 is installed and fixed.

[0035] Then, the limiting rod 75 is controlled to rotate so that the limiting rod 75 is embedded in the limiting groove 76 on the other handle 73, and then the nut 78 is tightened so that the nut 78 and the baffle 77 clamp the handle 73 to achieve the limiting fixation between the pair of handles 73 to prevent the valve stem 3 from falling off due to accidental touch, thereby ensuring the stability of the butterfly valve during operation.

[0036] When the valve plate 2 needs to be replaced, the valve stem 3 can be directly disassembled. The disassembly process is opposite to the installation process, so it will not be described in detail.

[0037] like Figure 2 As shown, a sealing sleeve 21 is provided around the outer wall of the valve plate 2 to increase the overall sealing of the valve plate 2. Multiple reinforcing rods 22 are arranged on both sides of the valve plate 2 in a staggered manner to increase the structural strength and impact resistance of the valve plate 2.

[0038] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A butterfly valve, characterized in that: include: The valve seat (1) is arranged in a circular ring shape, and an upper mounting seat (11) and a lower mounting seat (12) are arranged at the upper end and the lower end respectively; A valve plate (2) is arranged in the valve seat (1); The valve stem (3) passes through the lower mounting seat (12) and the valve plate (2) in sequence from bottom to top, and then the upper end is plugged into the upper mounting seat (11); A drive shaft (4) is vertically rotatably connected to the upper mounting seat (11), and a plug (41) is provided at the lower end thereof for plugging into the valve stem (3); An actuator (5) is arranged on the upper mounting seat (11) and is connected to the driving shaft (4).

2. A butterfly valve according to claim 1, characterized in that: The valve stem (3) comprises a connecting rod (31), a rotating seat (32), a pin (33) and a locking mechanism (7); the connecting rod (31) passes through the lower mounting seat (12) and the valve plate (2); the rotating seat (32) is rotatably arranged at the lower end of the connecting rod (31); the lower mounting seat (12) is provided with a groove (13) for the rotating seat (32) to be embedded; the pin (33) passes through the valve plate (2) and is threadedly connected to the connecting rod (31); and the locking mechanism (7) is used to fix the rotating seat (32).

3. A butterfly valve according to claim 2, characterized in that: The locking mechanism (7) comprises a locking rod (71), a spring (72) and a handle (73); the locking rod (71) is horizontally slidably connected to both sides of the rotating seat (32); the inner wall of the groove (13) is provided with a locking hole (74) for the locking rod (71) to be inserted; the spring (72) is arranged in the rotating seat (32) and is used to push the locking rod (71) to slide outward; the handle (73) is arranged on the outer wall of the locking rod (71) and passes through the lower end surface of the rotating seat (32).

4. A butterfly valve according to claim 3, characterized in that: The lower end of one of the handles (73) is rotatably connected to a limiting rod (75), and the lower end of the other handle (73) is provided with a limiting groove (76) for the limiting rod (75) to be embedded, and the limiting rod (75) is respectively provided with a baffle (77) and a nut (78) that abut against two sides of the other handle (73).

5. A butterfly valve according to claim 1, characterized in that: The upper mounting seat (11) and the lower mounting seat (12) are both provided with sealing rings (6) for the valve stem (3) to pass through.

6. A butterfly valve according to claim 1, characterized in that: The outer wall of the valve plate (2) is sheathed with a sealing sleeve (21).

7. A butterfly valve according to claim 6, characterized in that: Multiple reinforcing rods (22) are arranged on both sides of the valve plate (2) in a staggered manner in both directions.

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