Butterfly valve sealing structure

Abstract

The utility model discloses a butterfly valve sealing structure which comprises a valve body. A barrel shell is arranged on the outer side of the valve body, a buckle cover is arranged on the upper side of the barrel shell, an adjusting shell is arranged on the upper side of the buckle cover through evenly-distributed connecting rods, a valve rod is rotationally connected among the adjusting shell, the buckle cover and the valve body through a sealing bearing, a butterfly-shaped clack is arranged at the lower end of the valve rod, a limiting ring is arranged in the middle of the inner wall of the valve body, and the limiting ring and the butterfly-shaped clack are installed in a matched mode. A fixed ring is arranged at the right end of the inner wall of the valve body, a movable ring is arranged on the left side of the fixed ring through evenly-distributed telescopic columns, and a second rubber sealing ring is arranged on the left side of the movable ring. Therefore, contact abrasion between the butterfly valve and the limiting ring is avoided, the service life of the sealing part of the device is prolonged, the butterfly valve and the limiting ring can be extruded and sealed through spring pressure when the butterfly valve is closed, and the sealing effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve sealing technical field, concretely is a butterfly valve sealing structure. BACKGROUND

[0002] Butterfly valve is a simple structure regulating valve, can be used for low pressure pipeline medium's on-off control, butterfly valve closing piece (valve lobe or butterfly plate) is disc, rotates around valve shaft to reach the opening and closing effect of butterfly valve, mainly plays the role of cutting off and throttling to fluid on the pipeline, improves the closing sealing property between butterfly valve lobe and valve body inner wall through sealing structure, part butterfly valve sealing structure, rubber sealing ring is installed at the corresponding part of valve body inner wall and valve lobe, when valve body closes, through the elastic contact of rubber sealing ring and the outer edge of valve lobe, avoids fluid to flow out through the gap between valve lobe and valve body inner wall, thereby improves the closing sealing effect of valve body, however, the outer edge of valve lobe will rub with the inner wall of rubber sealing ring every time rotating open, long-term use can cause rubber sealing ring to wear seriously, influences the closing sealing effect of device valve lobe part. SUMMARY

[0003] The utility model solves the technical problem of overcoming the existing defects, provides a butterfly valve sealing structure, the rubber sealing ring can be first step away from the butterfly lobe when the butterfly lobe is rotated and opened through the transmission element and the elastic element, thereby avoids the contact wear between the two, improves the service life of the sealing part of the device, the butterfly valve can be extruded and sealed between the butterfly lobe and the limiting ring through the spring pressure when closing, and the sealing effect is good, which can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a butterfly valve sealing structure, including the valve body;

[0005] The valve body: its outside is equipped with the cylinder shell, the upper side of cylinder shell is equipped with the buckle cover, the upper side of buckle cover is equipped with the adjusting shell through the connecting rod of uniform distribution, the valve rod is rotatably connected between adjusting shell, buckle cover and valve body through sealing bearing, the lower end of valve rod is equipped with the butterfly lobe, the inner wall middle part of valve body is equipped with the limiting ring, the limiting ring is installed in cooperation with the butterfly lobe, the inner wall right end of valve body is equipped with the fixed ring, the left side of fixed ring is equipped with the moving ring through the telescopic column of uniform distribution, the left side of moving ring is equipped with rubber sealing ring no.

[0006] Further, the left and right walls of the adjusting shell are rotatably connected with a worm through a bearing, the upper end of the valve rod is provided with a worm wheel, the worm wheel is meshed with the worm, so that the valve rod has self-locking function when rotating the butterfly valve.

[0007] Further, the right end of the worm is provided with a hand wheel, so as to facilitate the external force applied to the turbine rotation.

[0008] Further, the upper end of the barrel shell is provided with a rubber sealing ring one, so as to improve the sealing effect between the cover and the barrel shell.

[0009] Further, the fixed ring and the movable ring are provided with uniformly distributed springs, the springs are movably sleeved with the outer ends of the adjacent telescopic columns, and the sealing effect between the butterfly valve and the limiting ring is improved by the compression elastic force of the spring.

[0010] Further, the wall of the valve body is provided with uniformly distributed rectangular grooves and guide sliding grooves, the rectangular grooves are communicated with the adjacent guide sliding grooves, the right wall of the rectangular groove is rotatably connected with a screw through a bearing, the outer left end of the screw is threadedly connected with a threaded cylinder, the outer side of the threaded cylinder is provided with a pushing seat, the pushing seat is slidably connected with the adjacent guide sliding groove, the pushing seat is matched and installed with a rubber sealing ring two, the left end of the screw is provided with a bevel gear two, the outer side of the valve rod is provided with uniformly distributed bevel gears one, the bevel gears one are meshed with the adjacent bevel gears two, so that the rubber sealing ring two in the butterfly valve is away from the butterfly valve with the rotation of the butterfly valve, and the abrasion degree of the rubber sealing ring two is reduced.

[0011] Further, the left and right sides of the valve body are provided with rubber sealing rings three, so as to seal the connecting surface between the butterfly valve and the external pipeline.

[0012] Compared with the prior art, the butterfly valve sealing structure has the following advantages:

[0013] When the butterfly valve is opened, the valve rod drives the butterfly disc to rotate around the axis to open, in the process, the valve rod drives the corresponding bevel gear one to rotate, the bevel gear one is connected through meshing to make the corresponding bevel gear two drive the corresponding stud to rotate positively, the stud is connected through threads to make the threaded cylinder drive the corresponding shift seat to move horizontally right along the guide sliding groove, the shift seat shifts the rubber sealing ring two to make it move right, the telescopic end of the telescopic column and the spring contract continuously, so that the outer edge of the butterfly disc and the rubber sealing ring two do not appear sliding wear contact when the butterfly disc rotates around the axis to open, the service life of the sealing part of the device is improved, when the butterfly valve is closed, the hand wheel is rotated positively, the shift seat moves left along the guide sliding groove to reset through the same principle, the horizontal limiting of the rubber sealing ring two is released, then the contact gap between the butterfly disc and the limiting ring is sealed by the compression elastic force of the spring, the sealing effect is good, the butterfly valve sealing structure, through the transmission element and the elastic element, when the butterfly disc rotates to open, the rubber sealing ring can be away from the butterfly disc in advance, so that the contact wear between the two is avoided, the service life of the sealing part of the device is improved, when the butterfly valve is closed, the butterfly disc and the limiting ring can be extruded and sealed by the spring pressure, the sealing effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structure schematic view of the utility model;

[0015] Fig. 2 It is a sectional structure schematic view of the utility model;

[0016] Fig. 3 It is an enlarged structure schematic view of A of the utility model.

[0017] In the drawing: 1 valve body, 2 cylinder shell, 3 buckle cover, 4 adjusting shell, 5 valve rod, 6 worm wheel, 7 worm, 8 hand wheel, 9 rubber sealing ring one, 10 limiting ring, 11 butterfly disc, 12 fixed ring, 13 telescopic column, 14 spring, 15 moving ring, 16 rubber sealing ring two, 17 bevel gear one, 18 stud, 19 threaded cylinder, 20 bevel gear two, 21 shift seat, 22 guide sliding groove, 23 rubber sealing ring three. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figs. 1-3 The embodiment provides a technical scheme: a butterfly valve sealing structure, comprising a valve body 1;

[0020] The utility model relates to a butterfly valve sealing structure, the butterfly valve sealing structure is characterized by comprising a valve body 1, the outer side of valve body 1 is equipped with cylinder shell 2, the upper side of cylinder shell 2 is equipped with buckle cover 3, the upper side of buckle cover 3 is equipped with adjusting shell 4 through the connecting rod of uniform distribution, valve stem 5 is rotatably connected between adjusting shell 4, buckle cover 3 and valve body 1 through sealing bearing, the lower end of valve stem 5 is equipped with butterfly valve 11, the middle part of the inner wall of valve body 1 is equipped with limiting ring 10, limiting ring 10 is installed in cooperation with butterfly valve 11, the right end of the inner wall of valve body 1 is equipped with fixed ring 12, the left side of fixed ring 12 is equipped with moving ring 15 through the telescopic column 13 of uniform distribution, the left side of moving ring 15 is equipped with rubber seal ring no.Thus avoid the contact wear between both, improve the service life of the sealing part of the device, the butterfly valve can be closed by the spring pressure to extrude and seal between the butterfly valve 11 and the limiting ring 10, the sealing effect is good,

[0021] The upper end of the barrel shell 2 is provided with a rubber sealing ring I 9, the left and right sides of the valve body 1 are both provided with a rubber sealing ring III 23, the sealing effect of the connecting surface between the device and the external pipeline is improved through the rubber sealing ring III 23, the sealing effect between the cover 3 and the barrel shell 2 is improved through the rubber sealing ring II 16, the gap between the butterfly valve 11 and the limiting ring 10 is sealed through the rubber sealing ring II 16, and the butterfly valve has good sealing effect.

[0022] The working principle of the butterfly valve sealing structure is as follows: the device is connected with the external pipeline through the flange, the external fluid is transported from right to left in the butterfly valve, the sealing effect of the connecting surface between the device and the external pipeline is improved through the rubber sealing ring III 23, the sealing effect between the cover 3 and the barrel shell 2 is improved through the rubber sealing ring II 16, the gap between the butterfly valve 11 and the limiting ring 10 is sealed through the rubber sealing ring II 16, when the device is used, the hand wheel 8 is rotated to open the butterfly valve, the hand wheel 8 drives the worm 7 to rotate reversely, the worm 7 is connected through meshing so that the turbine 6 drives the valve rod 5 to rotate reversely, the valve rod 5 drives the butterfly valve 11 to rotate, so that the inside of the valve body 1 is opened, in the process, the valve rod 5 drives the corresponding bevel gear I 17 to rotate, the bevel gear I 17 is connected through meshing so that the corresponding bevel gear II 20 drives the corresponding stud 18 to rotate forward, the stud 18 is connected through threads so that the threaded barrel 19 drives the corresponding toggle seat 21 to move horizontally right along the guide sliding groove 22, the toggle seat 21 drives the rubber sealing ring II 16 to move right, and the telescopic end of the telescopic column 13 and the spring 14 are constantly contracted, so that when the butterfly valve 11 rotates around the shaft of the valve rod 5 to open, sliding wear contact between the outside edge of the butterfly valve 11 and the rubber sealing ring II 16 is avoided, the service life of the sealing part of the device is improved, when the butterfly valve is closed, the hand wheel 8 is rotated forward, the toggle seat 21 moves left along the guide sliding groove 22 and returns to the original position through the same principle, the transverse limiting of the rubber sealing ring II 16 is removed, then the contact gap between the butterfly valve 11 and the limiting ring 10 is sealed through the compression elastic force of the spring 14, and the device is convenient to use.

[0023] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion in the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. A butterfly valve seal structure, characterized by: The utility model relates to a valve body (1) for a valve. The utility model discloses a valve body (1) for a valve, which comprises a barrel shell (2) arranged on the outer side of the valve body (1), a cover (3) arranged on the upper side of the barrel shell (2), an adjusting shell (4) arranged on the upper side of the cover (3) through uniformly distributed connecting rods, a valve rod (5) rotatably connected between the adjusting shell (4), the cover (3) and the valve body (1) through a sealing bearing, a butterfly valve (11) arranged on the lower end of the valve rod (5), a limiting ring (10) arranged in the middle of the inner wall of the valve body (1), the limiting ring (10) being matched and arranged with the butterfly valve (11), a fixed ring (12) arranged on the right end of the inner wall of the valve body (1), a moving ring (15) arranged on the left side of the fixed ring (12) through uniformly distributed telescopic columns (13), a rubber sealing ring II (16) arranged on the left side of the moving ring (15), and the rubber sealing ring II (16) being matched and arranged with the limiting ring (10) and the butterfly valve (11) respectively.

2. The butterfly valve seal structure of claim 1, wherein: The adjusting shell (4) is rotatably connected with a worm (7) between the left and right walls of the adjusting shell (4), and the upper end of the valve rod (5) is provided with a worm wheel (6) which is meshed and connected with the worm (7).

3. A butterfly valve seal structure according to claim 2, wherein: The right end of the worm (7) is provided with a hand wheel (8).

4. The butterfly valve seal structure of claim 1, wherein: The upper end of the barrel shell (2) is provided with a rubber sealing ring I (9).

5. The butterfly valve seal structure of claim 1, wherein: Uniformly distributed springs (14) are arranged between the fixed ring (12) and the moving ring (15), and the springs (14) are movably sleeved with the outer ends of the adjacent telescopic columns (13).

6. The butterfly valve seal structure of claim 1, wherein: Uniformly distributed rectangular grooves and guide sliding grooves (22) are arranged in the wall of the valve body (1), the rectangular grooves are communicated with the adjacent guide sliding grooves (22), the right walls of the rectangular grooves are rotatably connected with studs (18) through bearings, the outer left ends of the studs (18) are threadedly connected with threaded barrels (19), the outer sides of the threaded barrels (19) are provided with actuating seats (21), the actuating seats (21) are slidably connected with the adjacent guide sliding grooves (22), the actuating seats (21) are matched and arranged with the rubber sealing ring II (16), the left ends of the studs (18) are provided with bevel gears II (20), and the outer side of the valve rod (5) is provided with uniformly distributed bevel gears I (17) which are meshed and connected with the adjacent bevel gears II (20).

7. The butterfly valve seal structure of claim 1, wherein: Rubber sealing rings III (23) are arranged on the left and right sides of the valve body (1).

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