Double-clip type fluorine-lined butterfly valve

Abstract

The utility model relates to a wafer type fluorine-lined butterfly valve, which comprises a valve body, a shaft sleeve, a valve rod, a butterfly plate, a lining and sealing components, the valve body is rotatably connected with the valve rod through the shaft sleeve, the valve rod is connected with the butterfly plate, the valve body is clamped with the lining which is hermetically connected with the butterfly plate, the valve body is provided with the sealing components which are symmetrically distributed up and down, and each sealing component comprises a base, an elastic body and a top ring. The valve body is clamped with a base, one end of the base abuts against a shaft sleeve, the other end of the base is connected with a top ring through an elastic body, and the top ring is provided with a circular ring part used for abutting against the lining. The sealing assembly is mainly composed of the base, the elastic body and the top ring, the shaft sleeve is prevented from falling into the upper installation groove / lower installation cavity through the base, interference between the shaft sleeve and the elastic body is avoided, the top ring is provided with the circular ring portion with the arc-shaped cross section in the direction towards the lining, and therefore the contact area between the circular ring portion and the lining is increased, and the sealing effect is improved. Abrasion of the top ring to the lining 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 valves, in particular to a wafer-type fluorine-lined butterfly valve. Background Art

[0002] The fluorine-lined butterfly valve is a butterfly valve used for switching control of low-pressure pipeline media. The valve body is equipped with a lining for isolating corrosive gases and liquid media. The material of the lining also has the function of improving the sealing effect. However, the traditional fluorine-lined butterfly valve has certain shortcomings. The patent number is CN202120433140.3, which discloses a fluorine-lined plastic butterfly valve with good sealing performance, in which the side of the butterfly pad facing away from the pressure cover is a sleeve for connecting the upper valve stem. The sleeve is easy to detach from the valve body under the action of long-term rotation of the valve stem, causing it to move toward the direction of the butterfly pad, thereby affecting the normal operation of the butterfly pad and reducing the service life of the valve body. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a clamp-type fluorine-lined butterfly valve, including a valve body, a sleeve, a valve stem, a butterfly plate, a bushing and a sealing assembly, the valve body is rotatably connected to the valve stem through the sleeve, the valve stem is connected to the butterfly plate, the valve body is clamped with a bushing for sealing the butterfly plate, the valve body is provided with a sealing assembly symmetrically distributed up and down, the sealing assembly includes a base, an elastomer and a top ring, the valve body is clamped with the base, one end of the base is abutted with the sleeve, the other end is connected to the top ring through the elastomer, and the top ring is provided with a circular ring portion for abutting the bushing.

[0004] By adopting the above technical scheme, the rotation of the butterfly plate is controlled by the valve stem, the bushing is used to improve the sealing effect between the butterfly plate and the valve body, and the sealing assembly is used to improve the sealing effect at the rotating shaft of the butterfly plate. The sealing assembly consists of three parts: a base, an elastomer and a top ring. The base prevents the sleeve from falling into the upper mounting groove / lower mounting cavity to avoid interference between the sleeve and the elastomer. A circular ring portion with a circular arc cross section is provided on the top ring toward the bushing, thereby increasing the contact area between the circular ring portion and the bushing, so as to reduce the wear of the top ring on the bushing and increase the service life of the butterfly valve.

[0005] The utility model is further configured such that the valve body is provided with a coaxially distributed upper mounting groove and a lower mounting cavity, the shaft sleeve and the sealing assembly are connected to the upper mounting groove / lower mounting cavity, one end of the valve stem extends through the upper mounting groove to the lower mounting cavity, and the other end is provided with an external hexagonal portion for an external actuator.

[0006] Furthermore, the bushing is provided with a central portion extending into the upper mounting groove / lower mounting cavity, and clamping portions provided at both ends of the central portion, the valve stem passes through the central portion and is connected to the butterfly plate, and a groove matching the circular portion is provided on one side of the central portion facing the top ring.

[0007] By adopting the above technical solution, the bushing is a rotating body with a central part on the upper and lower sides. When the bushing is installed in the valve body, it is respectively clamped in the upper mounting groove and the lower mounting cavity of the valve body through the central part, and the positioning of the upper mounting groove / lower mounting cavity is used to prevent the bushing from rotating and dislocating in the valve body, so as to improve the stability of the structure.

[0008] The utility model is further configured that an inner stop ring is provided at one end of the base facing the butterfly plate, and the elastic body is a spring washer, which is sleeved on the base through the inner stop ring.

[0009] Furthermore, the inner diameter of the top ring is greater than the inner diameter of the base.

[0010] By adopting the above technical solution, the spring washer is arranged outside the inner retaining ring to limit the movement range of the spring washer and avoid it from directly contacting the valve stem. Moreover, since the inner diameter of the top ring is larger than the inner diameter of the base, the top ring does not contact the valve stem, thereby reducing the friction area of ​​the valve stem and making the valve stem operation smoother.

[0011] The utility model is further configured that the periphery of the valve body is provided with positioning holes distributed in a circumference.

[0012] By adopting the above technical solution, when installing the butterfly valve, the butterfly valve is installed between adjacent pipes. The end faces of the pipes are all equipped with flanges, and the mounting holes on the flanges correspond to the distribution of the positioning holes. The screws pass through the positioning holes to clamp the butterfly valve between adjacent pipes in a bolted manner. The valve body is provided with four groups of adjacent positioning holes with an angle of 22.5°, which is suitable for pipes with different numbers of mounting holes. The orientation of the valve body can be appropriately adjusted during installation. The overall structural design is reasonable and easy to install.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The sealing assembly consists of three parts: a base, an elastomer and a top ring. The base prevents the sleeve from falling into the upper mounting groove / lower mounting cavity to avoid interference between the sleeve and the elastomer.

[0015] 2. A circular ring portion with an arc cross section is provided on the top ring toward the bushing, thereby increasing the contact area between the circular ring portion and the bushing, reducing the wear of the top ring on the bushing and increasing the service life of the butterfly valve.

[0016] The embodiments of the utility model are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 For the utility model Figure 1 A partial enlarged view of the A-direction view;

[0019] Figure 3 For the utility model Figure 1 A partial enlarged view of the B direction view;

[0020] Figure 4 A three-dimensional diagram of the bushing of the utility model;

[0021] Figure 5 It is a front view of the bushing of the utility model;

[0022] Among them: 1-valve body, 2-shaft sleeve, 3-valve stem, 4-butterfly plate, 5-bushing, 6-sealing assembly, 11-upper mounting groove, 12-lower mounting cavity, 13-sealing groove, 14-positioning hole, 21-external hexagonal part, 51-center part, 52-clamping part, 511-groove, 61-base, 611-inner retaining ring, 62-elastic body, 63-top ring, 631-circular ring part; DETAILED DESCRIPTION

[0023] like Figure 1-3 As shown, this embodiment provides a wafer-type fluorine-lined butterfly valve, including a valve body 1, a sleeve 2, a valve stem 3, a butterfly plate 4, a bushing 5 and a sealing assembly 6. The valve body 1 is rotatably connected to the valve stem 3 through the sleeve 2, the valve stem 3 is connected to the butterfly plate 4, the valve body 1 is clamped with a bushing 5 for sealingly connecting the butterfly plate 4, the valve body 1 is provided with a sealing assembly 6 symmetrically distributed up and down, the sealing assembly 6 includes a base 61, an elastomer 62 and a top ring 63, the valve body 1 is clamped with the base 61, one end of the base 61 abuts the sleeve 2, and the other end is connected to the top ring 63 through the elastomer 62, and the top ring 63 is provided with a circular ring portion 631 for abutting the sleeve 5.

[0024] Combination Figure 4 As shown, in this embodiment, the valve body 1 is provided with an upper mounting groove 11 and a lower mounting cavity 12 which are coaxially distributed, the shaft sleeve 2 and the sealing assembly 6 are connected in the upper mounting groove 11 / the lower mounting cavity 12, one end of the valve stem 3 passes through the upper mounting groove 11 and extends into the lower mounting cavity 12, and the other end is provided with an outer hexagonal portion 21 for an external actuator, the bushing 5 is provided with a central portion 51 extending into the upper mounting groove 11 / the lower mounting cavity 12, and a clamping portion 52 is provided at both ends of the central portion 51, the valve stem 3 passes through the central portion 51 and is connected to the butterfly plate 4, a groove 511 which is adapted to the annular portion 631 is provided on the side of the central portion 51 facing the top ring 63, the bushing 5 is a rotating body with a central portion 51 on the upper and lower sides, when the bushing 5 is installed in the valve body 1, it is respectively clamped in the upper mounting groove 11 and the lower mounting cavity 12 of the valve body 1 through the central portion 51, and the positioning of the upper mounting groove 11 / the lower mounting cavity 12 prevents the bushing 5 from rotating and misaligning in the valve body 1.

[0025] In this embodiment, an inner stop ring 611 is provided at one end of the base 61 facing the butterfly plate 4, and the elastomer 62 is a spring washer. The spring washer is sleeved on the base 61 through the inner stop ring 611. The inner diameter of the top ring 63 is larger than the inner diameter of the base 61. The spring washer is sleeved outside the inner stop ring 611 to limit the movement range of the spring washer and avoid direct contact with the valve stem 3. Since the inner diameter of the top ring 63 is larger than the inner diameter of the base 61, the top ring 63 does not contact the valve stem 3, thereby reducing the friction area of ​​the valve stem 3 and making the operation of the valve stem 3 smoother.

[0026] Combination Figure 5 As shown, in this embodiment, the periphery of the valve body 1 is provided with positioning holes 14 distributed in a circumference.

[0027] The working principle of the utility model is that when installing the butterfly valve, the butterfly valve is installed between adjacent pipes, the end faces of the pipes are all provided with flanges, and the mounting holes on the flanges correspond to the distribution of the positioning holes 14, and the screws pass through the positioning holes 14 to clamp the butterfly valve between the adjacent pipes in a bolted connection manner; the valve stem 3 is externally connected to the electric / pneumatic actuator and the handwheel through the external hexagonal portion 21, and the opening and closing of the butterfly plate 4 is controlled by rotating the valve stem 3, and the sealing effect between the butterfly plate 4 and the valve body 1 is improved by the bushing 5, and the sealing assembly 6 is composed of three parts: a base 61, a spring washer and a top ring 63. The spring washer always gives the top ring 63 a force toward the bushing 5, so that when the butterfly plate 4 rotates, the bushing 5 at the shaft is always in contact with the surface of the butterfly plate 4, thereby improving the sealing effect of the butterfly valve.

[0028] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wafer-type fluorine-lined butterfly valve, comprising a valve body (1), a shaft sleeve (2), a valve stem (3), a butterfly plate (4), a bushing (5) and a sealing assembly (6), wherein the valve body (1) is rotatably connected to the valve stem (3) via the shaft sleeve (2), the valve stem (3) is connected to the butterfly plate (4), the valve body (1) is clamped with a bushing (5) for sealingly connecting the butterfly plate (4), the valve body (1) is provided with sealing assemblies (6) symmetrically distributed up and down, and is characterized in that: The sealing assembly (6) comprises a base (61), an elastic body (62) and a top ring (63); the valve body (1) is clamped with the base (61); one end of the base (61) abuts against the shaft sleeve (2); the other end is connected to the top ring (63) via the elastic body (62); the top ring (63) is provided with a circular ring portion (631) for abutting against the bushing (5).

2. According to claim 1, a wafer-type fluorine-lined butterfly valve is characterized in that: The valve body (1) is provided with an upper mounting groove (11) and a lower mounting cavity (12) which are coaxially distributed; the shaft sleeve (2) and the sealing assembly (6) are connected to the upper mounting groove (11) / the lower mounting cavity (12); one end of the valve stem (3) passes through the upper mounting groove (11) and extends into the lower mounting cavity (12); the other end is provided with an external hexagonal portion (21) for an external actuator.

3. According to claim 2, a wafer-type fluorine-lined butterfly valve is characterized in that: The bushing (5) is provided with a central portion (51) extending into the upper mounting groove (11) / lower mounting cavity (12), and clamping portions (52) provided at both ends of the central portion (51); the valve stem (3) passes through the central portion (51) and is connected to the butterfly plate (4); a groove (511) matching the annular portion (631) is provided on one side of the central portion (51) facing the top ring (63); and the valve body (1) is provided with a sealing groove (13) matching the clamping portion (52).

4. The wafer-type fluorine-lined butterfly valve according to claim 1 is characterized in that: An inner stop ring (611) is provided at one end of the base (61) facing the butterfly plate (4); the elastic body (62) is a spring washer, and the spring washer is sleeved on the base (61) through the inner stop ring (611).

5. According to claim 4, a wafer-type fluorine-lined butterfly valve is characterized in that: The inner diameter of the top ring (63) is greater than the inner diameter of the base (61).

6. The wafer-type fluorine-lined butterfly valve according to claim 1 is characterized in that: The periphery of the valve body (1) is provided with positioning holes (14) distributed in a circumferential manner.

Images