Sediment-proof butterfly valve

Abstract

The utility model discloses a sediment-proof butterfly valve which comprises a valve body and a sealing mechanism. A rotating groove is formed in the middle of the valve body, a valve rod is rotationally connected into the rotating groove through a bearing, a valve plate is arranged in the middle of the outer arc face of the valve rod, a rotating plate is arranged at the upper end of the outer arc face of the valve rod, the upper end of the valve body is connected with an adjusting shell through a bolt, limiting baffles are arranged on the bottom wall of the adjusting shell, and the limiting baffles and the rotating plate are installed in a matched mode. The sealing mechanisms are arranged at the upper end and the lower end of the rotating groove correspondingly and fixedly connected with the valve rod, each sealing mechanism comprises metal rings, and the metal rings are arranged at the upper end and the lower end of the inner arc face of the rotating groove correspondingly. Sediment is more efficiently prevented from entering the rotating connection portion of the butterfly valve rod, rotating abrasion of the butterfly valve is reduced, and the service life of the butterfly valve is prolonged.

Description

Technical Field

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

[0002] The butterfly valve is also called a butterfly valve. As the name suggests, its key component is like a butterfly facing the wind and rotating freely. The valve disc of the butterfly valve is a disc that rotates around an axis in the valve seat. The size of the rotation angle is the opening and closing degree of the valve. The butterfly valve is mainly composed of a valve body, a living body, a valve shaft, a bearing, a sealing device, an operating mechanism and ancillary components. The butterfly valve is mainly used for fluid flow control, which can adjust the flow, cut off the fluid, prevent backflow, control and adjust the fluid pressure. It is suitable for a variety of application scenarios, such as air conditioning systems, water treatment, power systems and heating systems. In the prior art, the valve stem of the butterfly valve is mainly connected to the valve body through a bearing. When conveying a fluid containing sediment, in order to avoid the influence of sediment on the bearing, a sealing rubber ring is often set between the valve stem and the rotating groove to prevent the fluid from contacting the bearing. However, when the pressure of the conveying fluid is relatively high, under the action of the fluid pressure, it is easy to cause the sealing effect to be reduced, and the sediment in the fluid is easy to enter the rotating groove and contact the bearing, increasing the wear of the bearing and affecting the service life of the butterfly valve. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a mud and sand proof butterfly valve, which blocks the contact between mud and the butterfly valve bearing through double sealing. The sealing effect increases with the increase of fluid pressure, and mud and sand are more effectively prevented from entering the rotating connection part of the butterfly valve stem, thereby reducing the rotational wear of the butterfly valve bearing, and increasing the service life of the butterfly valve, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mud and sand proof butterfly valve, comprising a valve body and a sealing mechanism;

[0005] Valve body: a rotating groove is provided in the middle thereof, a valve stem is rotatably connected to the inside of the rotating groove through a bearing, a valve plate is provided in the middle of the outer arc surface of the valve stem, a rotating plate is provided at the upper end of the outer arc surface of the valve stem, an adjusting housing is connected to the upper end of the valve body through bolts, and a limit baffle is provided on the bottom wall of the adjusting housing, and the limit baffle is installed in coordination with the rotating plate;

[0006] Sealing mechanism: It is respectively arranged at the upper and lower ends of the rotating groove. The sealing mechanism is fixedly connected to the valve stem. The double seal prevents the contact between mud and the butterfly valve bearing. The sealing effect increases with the increase of fluid pressure. It is more efficient to prevent mud from entering the rotating connection part of the butterfly valve stem, reduce the rotation wear of the butterfly valve, and increase the service life of the butterfly valve.

[0007] Furthermore, the sealing mechanism includes metal rings, which are respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove. The relative inner side surfaces of the two metal rings are both arc surfaces. The arc surfaces of the metal rings and the inner arc surface of the valve body are located in the same arc surface. The inner arc surface of the metal ring fits with the outer arc surface of the valve stem to avoid mud and sand accumulation.

[0008] Furthermore, the sealing mechanism also includes a swivel and a sealing ring. The swivel is respectively arranged at the upper and lower ends of the outer arc surface of the valve stem. The outer edge of the swivel is provided with a sealing ring. The sealing ring is fitted with the inner arc surface of the rotating groove. The relative inner sides of the two sealing rings are respectively fitted with adjacent metal rings to seal the valve stem and the rotating groove.

[0009] Furthermore, the sealing mechanism also includes a conical ring and a rubber pad, and the rubber pads are respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove, and the rubber pads are all annular pads. The inner arc surface of the rubber pads is in contact with the outer arc surface of the valve stem, and the relative inner side surfaces of the two rubber pads are both conical arc surfaces. The conical arc surfaces of the rubber pads are both provided with conical rings to provide better sealing under high-pressure environments.

[0010] Furthermore, flange rings are provided at both left and right ends of the valve body to facilitate connection of the valve body with an external pipeline.

[0011] Furthermore, a worm wheel is provided at the upper end of the valve stem, and a worm is rotatably connected between the front and rear inner walls of the adjusting shell. The worm is meshingly connected to the worm wheel. The rod body of the worm passes through the interior of the adjusting shell and is provided with a handwheel to facilitate the rotation of the valve stem.

[0012] Furthermore, a sealing rubber pad is provided on the outer arc surface of the valve plate to improve the blocking effect of the valve plate on the fluid.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the anti-sand butterfly valve has the following advantages:

[0014] When in use, the valve plate is driven to rotate by the valve stem to realize the opening and closing of the valve and control the flow of the fluid containing mud and sand in the valve body. During use, the valve stem and the rotating groove are sealed by the cooperation of the swivel and the sealing ring. When the pressure of the fluid containing mud and sand is relatively high, under the action of pressure, the fluid containing mud and sand penetrates through the gap between the inner arc surface of the rotating groove and the outer arc surface of the sealing ring. As the fluid penetration increases, the fluid will exert pressure on the surface of the tapered ring to deform the rubber pad, and the rubber pad will fit more closely with the valve stem, thereby improving the sealing effect. The double seal prevents the contact between mud and the butterfly valve bearing. The sealing effect increases with the increase of fluid pressure, which more effectively prevents mud and sand from entering the rotating connection part of the butterfly valve stem, reduces the rotational wear of the butterfly valve bearing, and increases the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the front view cross section of the overall device of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0018] Figure 4 It is a schematic diagram of the structure of the overall device of the utility model in a top view;

[0019] Figure 5 It is a schematic diagram of the structure of the adjustment shell of the utility model when viewed from above.

[0020] In the figure: 1 valve body, 2 rotating groove, 3 bearing, 4 valve stem, 5 valve plate, 6 rotating plate, 7 adjusting housing, 8 limit baffle, 9 sealing mechanism, 91 metal ring, 92 rotating ring, 93 sealing ring, 94 conical ring, 95 rubber pad, 10 flange ring, 11 worm gear, 12 worm, 13 handwheel, 14 sealing rubber pad. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 , This embodiment provides a technical solution: an anti-sand butterfly valve, including a valve body 1 and a sealing mechanism 9;

[0023] Valve body 1: A rotating groove 2 is provided in the middle thereof, and a valve stem 4 is rotatably connected to the inside of the rotating groove 2 through a bearing 3. A valve plate 5 is provided in the middle of the outer arc surface of the valve stem 4, and the valve plate 5 is driven to rotate by the valve stem 4 to realize the opening and closing of the valve and control the flow of the fluid containing sediment in the valve body 1. A rotating plate 6 is provided at the upper end of the outer arc surface of the valve stem 4, and an adjusting housing 7 is connected to the upper end of the valve body 1 through bolts. The bottom wall of the adjusting housing 7 is respectively provided with a limit baffle 8, and the limit baffle 8 is installed in cooperation with the rotating plate 6. Through the cooperation of the limit baffle 8 and the rotating plate 6, the rotation range of the valve plate 5 is limited, which is convenient for ninety degrees adjustment of the valve plate 5. The valve body 1 is rotated in degrees, and flange rings 10 are provided at both ends of the valve body 1, which is convenient for connecting the valve body 1 with an external pipeline. A worm wheel 11 is provided at the upper end of the valve stem 4, and a worm 12 is rotatably connected between the front and rear inner walls of the adjusting housing 7. The worm 12 is meshed and connected with the worm wheel 11. The rod body of the worm 12 passes through the interior of the adjusting housing 7 and is provided with a handwheel 13. Through the meshing connection between the worm 12 and the worm wheel 11, the worm wheel 11 drives the valve stem 4 and the valve plate 5 to rotate. A sealing rubber pad 14 is provided on the outer arc surface of the valve plate 5, so that the contact between the valve plate 5 and the inner arc surface of the valve body 1 is closer, thereby improving the blocking effect on the fluid;

[0024] Sealing mechanism 9: respectively arranged at the upper and lower ends of the rotating groove 2, the sealing mechanism 9 is fixedly connected to the valve stem 4, the sealing mechanism 9 includes a metal ring 91, the metal ring 91 is respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove 2, the relative inner side surfaces of the two metal rings 91 are both arc surfaces, the arc surface of the metal ring 91 and the inner arc surface of the valve body 1 are located in the same arc surface, the inner arc surface of the metal ring 91 is fitted with the outer arc surface of the valve stem 4, the metal ring 91 is a stainless steel metal ring, through the cooperation of the arc surface of the metal ring 91 and the arc surface of the valve body 1, the inner arc surface of the valve body 1 is made smoother to prevent the accumulation of mud and sand, the sealing mechanism 9 also includes a swivel 92 and a sealing ring 93, the swivel 92 is respectively arranged at the upper and lower ends of the outer arc surface of the valve stem 4, the outer edge of the swivel 92 is provided with a sealing ring 93, the sealing ring 93 is fitted with the inner arc surface of the rotating groove 2, the relative inner side surfaces of the two sealing rings 93 are respectively fitted with the adjacent metal rings 91, the sealing ring 93 is an O-type rubber sealing ring, through the rotating The cooperation of the ring 92 and the sealing ring 93 is used to seal the valve stem 4 and the rotating groove 2 to prevent mud and sand from affecting the operation of the bearing 3. The sealing mechanism 9 also includes a tapered ring 94 and a rubber pad 95. The rubber pads 95 are respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove 2. The rubber pads 95 are all annular pads. The inner arc surfaces of the rubber pads 95 are in contact with the outer arc surface of the valve stem 4. The relative inner sides of the two rubber pads 95 are tapered arc surfaces. The tapered arc surfaces of the rubber pads 95 are all provided with tapered rings 94. When the pressure of the fluid containing mud and sand is large, under the action of pressure, the fluid containing mud and sand penetrates through the gap between the inner arc surface of the rotating groove 2 and the outer arc surface of the sealing ring 93. As the fluid infiltration increases, the fluid will exert pressure on the surface of the tapered ring 94, causing the rubber pad 95 to deform, so that the rubber pad 95 and the valve stem 4 fit more closely, thereby improving the sealing effect, preventing the mud and sand in the fluid from contacting the bearing 3 when the pressure is too high, and ensuring the normal rotation of the butterfly valve.

[0025] The working principle of the anti-silt butterfly valve provided by the utility model is as follows: when in use, the worm 12 is rotated by the hand wheel 13, and the meshing connection between the worm 12 and the worm wheel 11 causes the worm wheel 11 to drive the valve stem 4 and the valve plate 5 to rotate, thereby realizing the opening and closing of the valve and controlling the flow of the fluid containing silt in the valve body 1. The cooperation between the limit baffle 8 and the rotating plate 6 limits the rotation range of the valve plate 5. During use, the cooperation between the arc surface of the metal ring 91 and the arc surface of the valve body 1 makes the inner arc surface of the valve body 1 smoother, thereby preventing the accumulation of silt. The sealing ring 93 cooperates to seal the valve stem 4 and the rotating groove 2 to prevent mud and sand from affecting the operation of the bearing 3. When the pressure of the fluid containing mud and sand is relatively high, the fluid containing mud and sand will penetrate through the gap between the inner arc surface of the rotating groove 2 and the outer arc surface of the sealing ring 93 under the action of pressure. As the fluid penetration increases, the fluid will exert pressure on the surface of the tapered ring 94 to deform the rubber pad 95, so that the rubber pad 95 and the valve stem 4 fit more closely, thereby improving the sealing effect, preventing the mud and sand in the fluid from contacting the bearing 3 when the pressure is too high, and ensuring the normal rotation of the butterfly valve.

[0026] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Anti-sand butterfly valve, characterized by: It comprises a valve body (1) and a sealing mechanism (9); The valve body (1) has a rotation groove (2) in the middle thereof, a valve stem (4) is rotatably connected to the inside of the rotation groove (2) via a bearing (3), a valve plate (5) is provided in the middle of the outer arc surface of the valve stem (4), a rotation plate (6) is provided at the upper end of the outer arc surface of the valve stem (4), an adjustment housing (7) is connected to the upper end of the valve body (1) via bolts, and a limit baffle (8) is provided on the bottom wall of the adjustment housing (7), and the limit baffle (8) is installed in coordination with the rotation plate (6); Sealing mechanism (9): respectively arranged at the upper and lower ends of the rotating groove (2), and the sealing mechanism (9) is fixedly connected to the valve stem (4).

2. The anti-sand butterfly valve according to claim 1 is characterized in that: The sealing mechanism (9) comprises a metal ring (91), wherein the metal ring (91) is respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove (2), and the relative inner side surfaces of the two metal rings (91) are both arc surfaces. The arc surfaces of the metal rings (91) and the inner arc surface of the valve body (1) are located in the same arc surface, and the inner arc surface of the metal ring (91) is in contact with the outer arc surface of the valve stem (4).

3. The anti-sand butterfly valve according to claim 2 is characterized in that: The sealing mechanism (9) further comprises a rotating ring (92) and a sealing ring (93), wherein the rotating ring (92) is respectively arranged at the upper and lower ends of the outer arc surface of the valve stem (4), and the outer edge of the rotating ring (92) is provided with a sealing ring (93), and the sealing ring (93) is fitted with the inner arc surface of the rotating groove (2), and the relative inner side surfaces of the two sealing rings (93) are respectively fitted with the adjacent metal rings (91).

4. The anti-sand butterfly valve according to claim 1 is characterized in that: The sealing mechanism (9) further comprises a conical ring (94) and a rubber pad (95), wherein the rubber pad (95) is respectively arranged at the upper and lower ends of the inner arc surface of the rotating groove (2), and the rubber pads (95) are all annular pads, and the inner arc surface of the rubber pads (95) is in contact with the outer arc surface of the valve stem (4), and the relative inner side surfaces of the two rubber pads (95) are both conical arc surfaces, and the conical arc surfaces of the rubber pads (95) are both provided with conical rings (94).

5. The anti-sand butterfly valve according to claim 1 is characterized in that: The left and right ends of the valve body (1) are both provided with flange rings (10).

6. The anti-sand butterfly valve according to claim 1 is characterized in that: A worm wheel (11) is provided at the upper end of the valve stem (4); a worm (12) is rotatably connected between the front and rear inner walls of the regulating housing (7); the worm (12) is meshingly connected with the worm wheel (11); the rod body of the worm (12) passes through the interior of the regulating housing (7) and is provided with a hand wheel (13).

7. The anti-sand butterfly valve according to claim 1 is characterized in that: The outer arc surface of the valve plate (5) is provided with a sealing rubber pad (14).

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