Sealing ring fixing structure of three-eccentric center butterfly valve

Abstract

The utility model relates to the technical field of three-eccentric center butterfly valves, in particular to a sealing ring fixing structure of a three-eccentric center butterfly valve, which comprises a valve seat, the top end of the outer wall of the valve seat is fixedly connected with a control box, a sealing ring is arranged in the valve seat, and a butterfly plate is rotatably connected in the sealing ring. A rotating shaft of the butterfly plate extends into the control box, and a rotating rod in transmission connection with the rotating shaft of the butterfly plate is rotationally connected between the two side faces in the control box. According to the sealing device, the threaded sleeves at the corresponding positions can rotate through rotation of the second gears, the threaded rods can move through the rotating threaded sleeves, the clamping plates at the corresponding positions can be driven to move through movement of the two threaded rods at the opposite positions, and when the multiple clamping plates get close to each other, the sealing ring can be fixed between the multiple clamping plates; and the sealing ring can be conveniently taken out from the interior of the valve seat in the later period, and the multiple clamping plates can be clamped on the outer wall of the sealing ring, so that the sealing ring can be prevented from being driven to move when the butterfly plate rotates.

Description

Technical Field

[0001] The utility model relates to the technical field of triple-eccentric butterfly valves, in particular to a sealing ring fixing structure of a triple-eccentric butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate. By rotating the butterfly plate around the corresponding axis in the valve body, the purpose of opening, closing or regulating the flow of the medium is achieved. The butterfly valve is not only simple in structure, small in size, light in weight, economical in material consumption, small in installation size, small in driving torque, easy and quick to operate, but also has good flow regulation function and closing and sealing characteristics. It is one of the fastest growing valve varieties in the past decade. In order to prevent leakage, the sealing ring of the triple eccentric butterfly valve usually needs to be fixed when in use.

[0003] At present, when fixing the sealing ring of the triple eccentric butterfly valve, in order to prevent leakage, the outer diameter of the sealing ring used is slightly larger than the inner diameter of the valve seat. Therefore, the sealing ring is usually fixed by utilizing the elasticity of the sealing ring itself to make its outer wall closely abut against the inner wall of the valve seat, and then the switch of the butterfly valve is controlled by the rotation of the butterfly plate. However, since the outer diameter of the sealing ring is slightly larger than the inner diameter of the valve seat, the sealing ring is very inconvenient to install, especially for some large butterfly valves, it is difficult to fix the sealing ring inside the valve seat. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of the utility model is to provide a sealing ring fixing structure for a three-eccentric butterfly valve, wherein the threaded sleeve at the corresponding position can be rotated by rotating gear 2, and the rotating threaded sleeve can move the threaded rod, and the movement of the two threaded rods at relative positions can drive the clamping plates at the corresponding positions to move, and when multiple clamping plates are close to each other, the sealing ring can be fixed between the multiple clamping plates, and it is convenient to remove the sealing ring from the inside of the valve seat at a later time, and the multiple clamping plates will be stuck on the outer wall of the sealing ring, which can prevent the sealing ring from moving when the butterfly plate rotates.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A sealing ring fixing structure for a three-eccentric butterfly valve comprises a valve seat, the top end of the outer wall of the valve seat is fixedly connected to a control box, the outer wall of the valve seat is provided with a fixing mechanism, the interior of the valve seat is provided with a sealing ring, the interior of the sealing ring is rotatably connected to a butterfly plate, the rotating shaft of the butterfly plate extends to the interior of the control box, a rotating rod connected to the rotating shaft of the butterfly plate is rotatably connected between the two side surfaces inside the control box, an annular groove is provided on the inner wall of the valve seat, and the fixing mechanism comprises a plurality of clamping plates which are distributed at equal angles in a ring and slide inside the annular groove.

[0007] Furthermore, multiple through holes are formed in annular shapes at equal angles on both sides of the outer wall of the valve seat, threaded rods are fixedly connected to the two ends of the outer wall of the splint, threaded sleeves are screwed on the outer wall of the threaded rods and rotated with the inner wall of the through hole at the corresponding position, gear 2 is fixedly connected to the outer wall of the threaded sleeve, rotating rings are fixedly connected to the two ends of the outer wall of the valve seat, multiple teeth meshing with gear 2 at the corresponding positions are fixed on the opposite side surfaces of the two rotating rings at equal angles, worm gears are fixedly connected to the top ends of the outer walls of the two threaded sleeves on the same splint, and worm gears are rotationally connected to the two opposite side surfaces on the outside of the valve seat.

[0008] Furthermore, a connecting rod is detachably connected between the two worm gears, and a hexagonal block is fixedly connected to the outer wall of the connecting rod, wherein the outer walls of the two clamping plates located at the butterfly plate shaft are provided with circular holes that penetrate and rotate with the butterfly plate shaft.

[0009] Furthermore, one end of the rotating rod passes through the outer side of the control box and is fixedly connected to the rotating wheel.

[0010] Furthermore, a gear 1 is fixedly connected to the outer wall of the rotating rod located outside the control box, a slide groove is opened at one end of the control box, a slider is slidably connected inside the slide groove, one end of the slider is fixedly connected to a rack meshing with gear 1, and two symmetrical springs are fixedly connected between the slider and the slide groove.

[0011] Furthermore, the outer diameter of the sealing ring is smaller than the inner diameter of the valve seat.

[0012] Beneficial effects of the utility model:

[0013] 1. The rotation of gear 2 can make the threaded sleeve at the corresponding position rotate, and the rotating threaded sleeve can make the threaded rod move. The movement of the two threaded rods at the relative positions can drive the clamping plates at the corresponding positions to move. When multiple clamping plates are close to each other, the sealing ring can be fixed between the multiple clamping plates, and it is convenient to remove the sealing ring from the inside of the valve seat later. Moreover, multiple clamping plates will be stuck on the outer wall of the sealing ring, which can prevent the sealing ring from moving when the butterfly plate rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

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

[0016] Figure 2 It is a schematic diagram of the valve seat and the control box in the utility model;

[0017] Figure 3 It is a schematic diagram of the fixing mechanism structure in the utility model;

[0018] Figure 4 It is a schematic diagram of a splint in the utility model.

[0019] In the figure: 1. valve seat; 11. sealing ring; 12. butterfly plate; 13. annular groove; 14. through hole; 2. control box; 21. rotating wheel; 22. gear 1; 23. slide groove; 24. rack; 25. spring; 3. fixing mechanism; 31. clamping plate; 311. threaded rod; 32. threaded sleeve; 33. gear 2; 34. rotating ring; 341. latching tooth; 35. worm wheel; 36. worm; 37. connecting rod; 38. hexagonal block. DETAILED DESCRIPTION

[0020] The following will be combined with 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 of 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.

[0021] See also Figure 1-4 As shown, a sealing ring fixing structure of a three-eccentric butterfly valve comprises a valve seat 1, the top of the outer wall of the valve seat 1 is fixedly connected to a control box 2, the outer wall of the valve seat 1 is provided with a fixing mechanism 3, a sealing ring 11 is provided inside the valve seat 1, a butterfly plate 12 is rotatably connected inside the sealing ring 11, the rotating shaft of the butterfly plate 12 extends to the inside of the control box 2, a rotating rod connected to the rotating shaft of the butterfly plate 12 is rotatably connected between the two side surfaces inside the control box 2, an annular groove 13 is provided on the inner wall of the valve seat 1, the fixing mechanism 3 comprises a plurality of clamping plates 31 which are distributed at equal angles in an annular shape and slide inside the annular groove 13, the sealing ring 11 can be conveniently installed and fixed by moving the plurality of clamping plates 31, and the sealing ring 11 can be conveniently removed from the inside of the valve seat 1 at a later time, and the plurality of clamping plates 31 will be stuck on the outer wall of the sealing ring 11, so as to prevent the sealing ring 11 from moving when the butterfly plate 12 rotates.

[0022] A plurality of through holes 14 are provided in an annular manner at equal angles on both sides of the outer wall of the valve seat 1, a threaded rod 311 is fixedly connected to both ends of the outer wall of the clamp plate 31, a threaded sleeve 32 is screwed on the outer wall of the threaded rod 311 and rotates with the inner wall of the through hole 14 at the corresponding position, a gear 2 33 is fixedly connected to the outer wall of the threaded sleeve 32, a rotating ring 34 is fixedly connected to both ends of the outer wall of the valve seat 1, a plurality of latch teeth 341 meshing with the gear 2 33 at the corresponding position are fixed on the opposite side surfaces of the two rotating rings 34 at equal angles, a worm gear 35 is fixedly connected to the top of the outer walls of the two threaded sleeves 32 on the same clamp plate 31, a worm gear 35 is fixedly connected to the opposite side surfaces of the outer side of the valve seat 1, a worm 36 meshing with the worm gear 35 at the corresponding position is rotatably connected, and the threaded sleeve 32 at the corresponding position can be rotated by rotating the gear 2 33. The rotating threaded sleeve 32 can make the threaded rod 311 move, and the movement of the two threaded rods 311 at the relative position can drive the clamping plate 31 at the corresponding position to move. When the multiple clamping plates 31 are close to each other, the sealing ring 11 can be fixed between the multiple clamping plates 31, and it is convenient to remove the sealing ring 11 from the inside of the valve seat 1 later. Moreover, the multiple clamping plates 31 will be stuck on the outer wall of the sealing ring 11, which can prevent the sealing ring 11 from moving when the butterfly plate 12 rotates. The two worm gears 36 are detachably connected with a connecting rod 37, and the outer wall of the connecting rod 37 is fixedly connected with a hexagonal block 38, wherein the outer walls of the two clamping plates 31 located at the rotating shaft of the butterfly plate 12 are both provided with circular holes that rotate with the rotating shaft of the butterfly plate 12, and the rotation of the connecting rod 37 can make the multiple gears 33 rotate at the same time, so that the multiple clamping plates 31 can fix the sealing ring 11.

[0023] One end of the rotating rod passes through the outer side of the control box 2 and is fixedly connected to a rotating wheel 21, which is used to control the rotation of the butterfly plate 12. The outer wall of the rotating rod located outside the control box 2 is fixedly connected to a gear 22. A slide groove 23 is provided at one end of the control box 2. A slider is slidably connected inside the slide groove 23. One end of the slider is fixedly connected to a rack 24 meshing with the gear 22. Two symmetrical springs 25 are fixedly connected between the slider and the slide groove 23. The rack 24 can be meshed with the gear 22 by the two springs 25, so as to prevent the rotating wheel 21 from rotating without human control. The outer diameter of the sealing ring 11 is smaller than the inner diameter of the valve seat 1, so as to facilitate the sealing ring 11 to be placed inside the valve seat 1.

[0024] Working principle: When in use, first put the butterfly plate 12 into the sealing ring 11, and the two ends of the rotating shaft of the butterfly plate 12 pass through the circular holes at the corresponding positions respectively, and then install the butterfly plate 12 inside the valve seat 1. Since the outer diameter of the sealing ring 11 is smaller than the inner diameter of the valve seat 1, the hexagonal block 38 can be rotated by a wrench to make the connecting rod 37 drive the two worms 36 to rotate, and the rotating worm 36 can make the worm wheel 35 at the corresponding position drive the gear 2 33 at the corresponding position to rotate. Since the gear 2 33 is respectively engaged with the multiple latch teeth 341 at the corresponding positions, the rotating gear 2 33 can make the rotating ring 34 at the corresponding position rotate, and the rotating rotating ring 34 can make the other multiple gears 2 33 rotate. The rotating gear 2 33 can make the threaded sleeve 32 at the corresponding position rotate. Since the threaded sleeve 32 is screwed and connected with the threaded rod 311 at the corresponding position, the rotating threaded sleeve 32 can move the threaded rod 311 The plurality of clamping plates 31 are clamped on the outer wall of the sealing ring 11, and the sealing ring 11 is prevented from moving when the butterfly plate 12 rotates.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A sealing ring fixing structure for a triple eccentric butterfly valve, It is characterized in that The invention comprises a valve seat (1), wherein the top of the outer wall of the valve seat (1) is fixedly connected to a control box (2), the outer wall of the valve seat (1) is provided with a fixing mechanism (3), the interior of the valve seat (1) is provided with a sealing ring (11), the interior of the sealing ring (11) is rotatably connected to a butterfly plate (12), the rotating shaft of the butterfly plate (12) extends to the interior of the control box (2), a rotating rod which is rotatably connected to the rotating shaft of the butterfly plate (12) is rotatably connected between the two side surfaces inside the control box (2), an annular groove (13) is provided on the inner wall of the valve seat (1), and the fixing mechanism (3) comprises a plurality of clamping plates (31) which are distributed in an annular shape at equal angles and slide inside the annular groove (13).

2. According to claim 1, a sealing ring fixing structure of a triple eccentric butterfly valve, It is characterized in that Both sides of the outer wall of the valve seat (1) are provided with a plurality of through holes (14) at equal angles in an annular manner, both ends of the outer wall of the clamping plate (31) are fixedly connected with threaded rods (311), the outer wall of the threaded rod (311) is screwed together with a threaded sleeve (32) that rotates with the inner wall of the through hole (14) at the corresponding position, the outer wall of the threaded sleeve (32) is fixedly connected with a gear 2 (33), both ends of the outer wall of the valve seat (1) are fixedly connected with a rotating ring (34), and the opposite side surfaces of the two rotating rings (34) are fixedly provided with a plurality of latching teeth (341) that mesh with the gear 2 (33) at the corresponding position at an annular manner at equal angles, wherein the top ends of the outer walls of the two threaded sleeves (32) located on the same clamping plate (31) are fixedly connected with a worm gear (35), and the two opposite side surfaces on the outer side of the valve seat (1) are rotatably connected with a worm (36) that meshes with the worm gear (35) at the corresponding position.

3. According to claim 2, a sealing ring fixing structure of a triple eccentric butterfly valve, It is characterized in that A connecting rod (37) is detachably connected between the two worm gears (36), and a hexagonal block (38) is fixedly connected to the outer wall of the connecting rod (37). The outer walls of the two clamping plates (31) located at the rotating shaft of the butterfly plate (12) are both provided with circular holes that penetrate and rotate with the rotating shaft of the butterfly plate (12).

4. According to claim 1, a sealing ring fixing structure of a triple eccentric butterfly valve, It is characterized in that One end of the rotating rod passes through the outer side of the control box (2) and is fixedly connected to a rotating wheel (21).

5. According to claim 4, a sealing ring fixing structure of a triple eccentric butterfly valve, It is characterized in that The outer wall of the rotating rod located outside the control box (2) is fixedly connected to a gear one (22); a slide groove (23) is provided at one end of the control box (2); a slider is slidably connected inside the slide groove (23); one end of the slider is fixedly connected to a rack (24) meshing with the gear one (22); and two symmetrical springs (25) are fixedly connected between the slider and the slide groove (23).

6. According to claim 5, a sealing ring fixing structure of a triple eccentric butterfly valve, It is characterized in that The outer diameter of the sealing ring (11) is smaller than the inner diameter of the valve seat (1).

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