Corrosion-resistant lug type fluorine-lined butterfly valve

Abstract

The utility model relates to a corrosion-resistant lug type fluorine lining butterfly valve which comprises an upper valve body, a lower valve body, a valve seat, a valve rod, a butterfly plate, a lining and a sealing assembly, the upper valve body is detachably connected with the lower valve body, the valve seat is clamped between the upper valve body and the lower valve body, the valve seat is rotatably connected with the butterfly plate through the valve rod, and the valve seat is provided with the lining used for being connected with the butterfly plate in a sealing mode. A containing groove used for containing the sealing assembly is formed in the lining, a center part is arranged at the position, located in the containing groove, of the lining, and the sealing assembly is arranged between the upper valve body / lower valve body and the center part. The valve seat is provided with the butterfly plate and the sealing assembly through the valve rod, the valve seat is installed between the upper valve body and the lower valve body in an up-and-down splicing mode, the overall structure is simple, and installation is convenient. The corrosion-resistant lining is formed on the basis of the valve seat in an injection molding mode, so that the lining is directly attached to the valve seat, the installation difficulty of the lining is reduced, the lining is prevented from being damaged during installation, and the sealing effect of the butterfly valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a corrosion-resistant lug-type fluorine-lined butterfly valve. Background Art

[0002] Fluorine-lined butterfly valve is a butterfly valve used for on-off control of low-pressure pipeline media. The lug-type fluorine-lined butterfly valve can be driven by manual, worm gear, pneumatic, or electric actuators, and the connection method for the external pipeline can be flange or clamp. The structural form can be single eccentric, center line, double eccentric, or triple eccentric. It has a very wide range of applications. The traditional fluorine-lined butterfly valve is equipped with a sleeve, which is used to isolate corrosive gases and liquid media. However, when installing the sleeve, it needs to be folded and installed on the valve. There is a risk of cracking of the sleeve after installation, which affects the sealing effect of the butterfly valve. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a corrosion-resistant lug-type fluorine-lined butterfly valve, comprising an upper valve body, a lower valve body, a valve seat, a valve stem, a butterfly plate, a bushing and a sealing assembly, the upper valve body is detachably connected to the lower valve body, the valve seat is clamped between the upper valve body and the lower valve body, the valve seat is rotatably connected to the butterfly plate through the valve stem, the valve seat is provided with a bushing for sealingly connecting the butterfly plate, and a receiving groove for accommodating the sealing assembly, the bushing is provided with a central portion at the receiving groove, and the sealing assembly is arranged between the upper valve body / lower valve body and the central portion.

[0004] By adopting the above technical solution, the valve seat is respectively installed with a butterfly plate and a sealing assembly through the valve stem, and the valve seat is installed between the upper valve body and the lower valve body by splicing up and down. The overall structure is simple and easy to install. A corrosion-resistant bushing is injection molded on the basis of the valve seat, so that the bushing is directly attached to the valve seat, thereby reducing the difficulty of bushing installation and avoiding damage to the bushing during installation, so as to ensure the sealing effect of the butterfly valve.

[0005] The utility model is further configured such that the upper valve body and the lower valve body are both provided with a semicircular groove and a steering groove, the valve seat is provided with a positioning portion adapted to the semicircular groove, the valve seat is clamped between the upper valve body and the lower valve body through the positioning portion, and the valve stem is rotatably connected to the steering groove.

[0006] Furthermore, countersunk holes and positioning holes are provided at both ends of the upper valve body, and threaded holes matched with the countersunk holes and positioning rods matched with the positioning holes are provided at both ends of the lower valve body.

[0007] Furthermore, the upper valve body and the lower valve body are both provided with lugs distributed in a circumference, reinforcing ribs are provided between adjacent lugs, and the lugs are provided with first mounting holes for externally connected pipelines.

[0008] Furthermore, the upper valve body is provided with second mounting holes for an external actuator around the steering groove.

[0009] By adopting the above technical solution, the upper valve body and the lower valve body are used as adapters for external manual, pneumatic actuators and pipelines, which simplifies the overall structure of the valve seat and facilitates sleeve injection molding. The upper valve body and the lower valve body are combined to form a circumferentially evenly distributed lug portion, and the upper valve body is positioned and connected to the lower valve body by a positioning rod, so that the end faces of the upper valve body and the lower valve body are coplanar, thereby improving the sealing effect between the butterfly valve and the pipeline.

[0010] The utility model is further configured that the bushing is provided with a sealing portion and an extension portion, the sealing portion is attached to the end faces at both ends of the valve seat, the valve seat is provided with a groove matched with the extension portion, and the extension portion is clamped between the upper valve body / lower valve body and the groove.

[0011] By adopting the above technical solution, when the butterfly valve is connected to an external pipeline, the sealing part has a sealing effect of a sealing ring, and the positioning of the extension part prevents the bushing from being stressed and separated from the valve seat, thereby maintaining the stability of the structure.

[0012] The utility model is further configured such that the sealing assembly includes a base, a spring washer and a top ring, the base is connected to the top ring via the spring washer, the accommodating groove is slidably connected to the top ring, the base abuts against the upper valve body / lower valve body, and one end of the top ring abuts against the center portion.

[0013] By adopting the above technical solution, the top ring is slidably connected to the valve seat, and the spring washer is always in a compressed state. The spring washer always applies a force toward the center of the top ring, and the top ring squeezes and deforms the center toward the butterfly plate, thereby improving the sealing effect at the turning point of the valve stem. The overall structure is simple and easy to install.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The valve seat is respectively equipped with a butterfly plate and a sealing assembly through the valve stem, and the valve seat is installed between the upper valve body and the lower valve body by means of upper and lower splicing. The overall structure is simple and easy to install;

[0016] 2. A corrosion-resistant bushing is injection molded on the basis of the valve seat, so that the bushing is directly attached to the valve seat, thereby reducing the difficulty of bushing installation and avoiding damage to the bushing during installation to ensure the sealing effect of the butterfly valve.

[0017] The embodiments of the utility model are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the structural explosion diagram of the utility model;

[0019] Figure 2 It is the front view of the utility model;

[0020] Figure 3For the utility model Figure 2 Sectional view of the A direction view;

[0021] Figure 4 For the utility model Figure 3 A partial enlarged view of the B direction view;

[0022] Among them: 1-upper valve body, 11-semicircular groove, 12-turning groove, 13-counterbore, 14-positioning hole, 15-lug part, 16-reinforcement rib, 17-first mounting hole, 18-second mounting hole, 2-lower valve body, 21-threaded hole, 22-positioning rod, 3-valve seat, 31-accommodating groove, 32-positioning part, 33-groove, 4-valve stem, 5-butterfly plate, 6-bushing, 61-center part, 62-sealing part, 63-extension part, 7-sealing assembly, 71-base, 72-spring washer, 73-top ring; DETAILED DESCRIPTION

[0023] like Figure 1 As shown, this embodiment provides a corrosion-resistant lug-type fluorine-lined butterfly valve, including an upper valve body 1, a lower valve body 2, a valve seat 3, a valve stem 4, a butterfly plate 5, a bushing 6 and a sealing assembly 7. The upper valve body 1 is detachably connected to the lower valve body 2, the valve seat 3 is clamped between the upper valve body 1 and the lower valve body 2, the valve seat 3 is rotatably connected to the butterfly plate 5 through the valve stem 4, the valve seat 3 is provided with a bushing 6 for sealingly connecting the butterfly plate 5, and is provided with a receiving groove 31 for accommodating the sealing assembly 7, the bushing 6 is provided with a center portion 61 at the receiving groove 31, and the sealing assembly 7 is arranged between the upper valve body 1 / lower valve body 2 and the center portion 61.

[0024] Combination Figure 2 As shown, in this embodiment, the upper valve body 1 and the lower valve body 2 are both provided with a semicircular groove 11 and a steering groove 12, the valve seat 3 is provided with a positioning portion 32 adapted to the semicircular groove 11, the valve seat 3 is clamped between the upper valve body 1 and the lower valve body 2 through the positioning portion 32, the valve stem 4 is rotatably connected to the steering groove 12, countersunk holes 13 and positioning holes 14 are provided at both ends of the upper valve body 1, threaded holes 21 adapted to the countersunk holes 13, and positioning rods 22 adapted to the positioning holes 14 are provided at both ends of the lower valve body 2, the upper valve body 1 and the lower valve body 2 are both provided with circumferentially distributed lugs 15, reinforcing ribs 16 are provided between adjacent lugs 15, and the lugs 15 are provided with first mounting holes 17 for external pipes, and the upper valve body 1 is provided with second mounting holes 18 for external actuators around the steering groove 12.

[0025] In the utility model, the upper valve body 1 and the lower valve body 2 are used as adapters for external manual, pneumatic actuators and pipelines, simplifying the overall structure of the valve seat 3 and facilitating injection molding of the bushing 6. The upper valve body 1 and the lower valve body 2 are combined to form a circumferentially evenly distributed lug portion 15, and the upper valve body 1 is positioned and connected to the lower valve body 2 by a positioning rod 22, so that the end faces of the upper valve body 1 and the lower valve body 2 are coplanar, thereby improving the sealing effect between the butterfly valve and the pipeline.

[0026] Combination Figure 3 , 4 As shown, in this embodiment, the bushing 6 is provided with a sealing portion 62 and an extension portion 63, the sealing portion 62 is attached to the end surfaces at both ends of the valve seat 3, the valve seat 3 is provided with a groove 33 adapted to the extension portion 63, the extension portion 63 is clamped between the upper valve body 1 / lower valve body 2 and the groove 33, the sealing assembly 7 includes a base 71, a spring washer 72 and a top ring 73, the base 71 is connected to the top ring 73 through the spring washer 72, the accommodating groove 31 is slidably connected to the top ring 73, the base 71 abuts against the upper valve body 1 / lower valve body 2, and one end of the top ring 73 abuts against the center portion 61.

[0027] In the utility model, the top ring 73 is slidably connected to the valve seat 3, and the spring washer 72 is always in a compressed state. The spring washer 72 always applies a force to the top ring 73 toward the center portion 61. The top ring 73 squeezes and deforms the center portion 61 toward the butterfly plate 5, thereby improving the sealing effect at the turning point of the valve stem 4. The overall structure is simple and easy to install.

[0028] The installation method of the utility model is: the butterfly plate 5 is clamped into the valve seat 3, the valve stem 4 penetrates the valve seat 3 and the butterfly plate 5 at the same time, the sealing assembly 7 is clamped into the receiving grooves 31 at the upper and lower ends of the valve seat 3 through the valve stem 4, and the top ring 73 is facing the direction of the bushing 6. After the upper valve body 1 and the lower valve body 2 are installed with the shaft sleeve, the valve seat 3 is clamped into the semicircular groove 11 in an upper and lower splicing manner through the positioning of the valve stem 4 and the positioning rod 22, and then the upper valve body 1 and the lower valve body 2 are fixed by threaded connection, thereby completing the assembly. The overall structure is simple and easy to install.

[0029] 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 corrosion-resistant lug-type fluorine-lined butterfly valve, characterized in that: The valve seat (3) comprises an upper valve body (1), a lower valve body (2), a valve seat (3), a valve stem (4), a butterfly plate (5), a bushing (6) and a sealing assembly (7); the upper valve body (1) is detachably connected to the lower valve body (2); the valve seat (3) is clamped between the upper valve body (1) and the lower valve body (2); the valve seat (3) is rotatably connected to the butterfly plate (5) via the valve stem (4); the valve seat (3) is provided with a bushing (6) for sealingly connecting the butterfly plate (5) and a receiving groove (31) for receiving the sealing assembly (7); the bushing (6) is provided with a central portion (61) at the receiving groove (31); and the sealing assembly (7) is arranged between the upper valve body (1) / lower valve body (2) and the central portion (61).

2. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 1 is characterized in that: The upper valve body (1) and the lower valve body (2) are both provided with a semicircular groove (11) and a steering groove (12); the valve seat (3) is provided with a positioning portion (32) adapted to the semicircular groove (11); the valve seat (3) is clamped between the upper valve body (1) and the lower valve body (2) via the positioning portion (32); and the valve stem (4) is rotatably connected to the steering groove (12).

3. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 2 is characterized in that: The upper valve body (1) is provided with a countersunk hole (13) and a positioning hole (14) at both ends, and the lower valve body (2) is provided with a threaded hole (21) matched with the countersunk hole (13) and a positioning rod (22) matched with the positioning hole (14) at both ends.

4. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 3 is characterized by: The upper valve body (1) and the lower valve body (2) are both provided with lugs (15) distributed in a circumferential manner, reinforcing ribs (16) are provided between adjacent lugs (15), and the lugs (15) are provided with first mounting holes (17) for externally connecting pipes.

5. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 4 is characterized in that: The upper valve body (1) is provided with second mounting holes (18) for externally connecting an actuator on the periphery of the steering groove (12).

6. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 1, characterized in that: The bushing (6) is provided with a sealing portion (62) and an extension portion (63), the sealing portion (62) is attached to the end faces at both ends of the valve seat (3), the valve seat (3) is provided with a groove (33) adapted to the extension portion (63), and the extension portion (63) is clamped between the upper valve body (1) / lower valve body (2) and the groove (33).

7. The corrosion-resistant lug-type fluorine-lined butterfly valve according to claim 6 is characterized by: The sealing assembly (7) comprises a base (71), a spring washer (72) and a top ring (73); the base (71) is connected to the top ring (73) via the spring washer (72); the accommodating groove (31) is slidably connected to the top ring (73); the base (71) abuts against the upper valve body (1) / lower valve body (2); and one end of the top ring (73) abuts against the central portion (61).

Images