Butterfly valve with rust-proof structure

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a butterfly valve with an anti-rust structure, which comprises a main valve body and a butterfly plate for partition, the butterfly plate is mounted in the main valve body, and a valve sealing ring is arranged between the butterfly plate and the main valve body; a first mounting cylinder and a second mounting cylinder are arranged on the surface of the main valve body, a driving valve shaft is mounted on the first mounting cylinder, a supporting valve shaft is mounted on the inner wall of the second mounting cylinder, and mounting parts are symmetrically arranged on the butterfly plate. According to the butterfly valve with the anti-rust structure, by arranging a first shaft sealing ring and a second shaft sealing ring, a first mounting cylinder and a driving valve shaft as well as a second mounting cylinder and a supporting valve shaft are sealed through the first shaft sealing ring; and the two mounting parts of the butterfly plate respectively seal a gap between the driving valve shaft and the supporting valve shaft through the two second shaft sealing rings to prevent a water medium from entering the shaft hole, so that the shaft hole can be effectively prevented from rusting, and a pipeline water source is prevented from being polluted by rust.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with an anti-rust structure. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] There will be a gap between the shaft hole of the butterfly plate and the valve shaft after they are assembled, and between the shaft hole of the valve body, the shaft sleeve and the valve stem after they are assembled. When used in a water medium environment, water medium will enter the shaft hole, and after long-term operation, rusty water will be produced to pollute the pipeline water source. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a butterfly valve with an anti-rust structure, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: a butterfly valve with an anti-rust structure, comprising: a main valve body and a butterfly plate for isolation, the butterfly plate is installed inside the main valve body, and a valve sealing ring is arranged between the butterfly plate and the main valve body;

[0006] The surface of the main valve body is respectively provided with a first mounting cylinder and a second mounting cylinder, the first mounting cylinder is provided with a driving valve shaft, the inner wall of the second mounting cylinder is provided with a supporting valve shaft, the butterfly plate is symmetrically provided with mounting parts, the inner walls of the two mounting parts are respectively connected with one end of the driving valve shaft and one end of the supporting valve shaft;

[0007] The inner walls of the first mounting tube and the second mounting tube are both installed with a first shaft sealing ring, the inner walls of the two mounting parts are both installed with a second shaft sealing ring, and the two second shaft sealing rings are respectively connected to the surface of the driving valve shaft and the surface of the supporting valve shaft.

[0008] Preferably, a mounting groove is provided on the inner wall of the main valve body, a docking groove is provided on the surface of the butterfly plate, the valve sealing ring is installed on the inner wall of the mounting groove, and the valve sealing ring is connected to the inner wall of the docking groove.

[0009] Preferably, a through hole is opened on the surface of the driving valve shaft, a first fixing seat is arranged on the surface of the mounting portion docking with the driving valve shaft, a fixing pin is installed on the inner wall of the first fixing seat, and one end of the fixing pin extends to the inner wall of the through hole.

[0010] Preferably, a blind hole is opened on the surface of the supporting valve shaft, a second fixing seat is arranged on the surface of the mounting portion connecting with the supporting valve shaft, a positioning pin is installed on the inner wall of the second fixing seat, and one end of the positioning pin extends to the inner wall of the blind hole.

[0011] Preferably, the inner walls of the first fixing seat and the second fixing seat are both plugged with rust-proof sealing plugs.

[0012] Preferably, the inner walls of the first mounting tube and the second mounting tube are each provided with a first fixing groove, and the two first shaft sealing rings are respectively installed on the inner walls of the two first fixing grooves, and the inner walls of the two inner walls of the mounting parts are each provided with a second fixing groove, and the two second shaft sealing rings are respectively installed on the inner walls of the two second fixing grooves.

[0013] Preferably, a rotating sleeve is provided between the first mounting cylinder and the driving valve shaft and between the second mounting cylinder and the supporting valve shaft.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The butterfly valve with anti-rust structure is provided with a first shaft sealing ring and a second shaft sealing ring. The first shaft sealing ring is used to seal between the first mounting cylinder and the driving valve shaft and between the second mounting cylinder and the supporting valve shaft. The two mounting parts of the butterfly plate respectively seal the gap between the driving valve shaft and the supporting valve shaft through two second shaft sealing rings to block the water medium from entering the shaft hole, which can effectively prevent the shaft hole from rusting and prevent rusty water from polluting the pipeline water source.

[0016] 2. The butterfly valve with an anti-rust structure is provided with an anti-rust sealing plug. The anti-rust sealing plug is installed on the top of the inner hole of the first fixed seat and the second fixed seat of the butterfly plate, which can block the water medium from entering the through hole for placing the fixing pin and the blind hole for placing the positioning pin, thereby preventing the generation of rusty water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the side section structure of the utility model;

[0020] Figure 4 It is a partial enlarged structural schematic diagram of the side section of the fixing pin position of the utility model;

[0021] Figure 5 It is a partial enlarged structural schematic diagram of the side section at the location of the positioning pin of the utility model.

[0022] In the figure: 1. main valve body; 2. butterfly plate; 3. valve sealing ring; 4. first mounting cylinder; 5. second mounting cylinder; 6. drive valve shaft; 7. support valve shaft; 8. mounting part; 9. first shaft sealing ring; 10. second shaft sealing ring; 11. mounting groove; 12. docking groove; 13. through hole; 14. first fixing seat; 15. fixing pin; 16. blind hole; 17. second fixing seat; 18. positioning pin; 19. anti-rust sealing plug; 20. first fixing groove; 21. second fixing groove; 22. rotating sleeve. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-5 The butterfly valve with rust-proof structure comprises: a main valve body 1 and a butterfly plate 2 for partitioning, the butterfly plate 2 is installed inside the main valve body 1, and a valve sealing ring 3 is arranged between the butterfly plate 2 and the main valve body 1, the inner wall of the main valve body 1 is provided with a mounting groove 11, the surface of the butterfly plate 2 is provided with a docking groove 12, the valve sealing ring 3 is installed on the inner wall of the mounting groove 11, and the valve sealing ring 3 is connected to the inner wall of the docking groove 12, the mounting groove 11 fixes the position of the valve sealing ring 3 to prevent the position of the valve sealing ring 3 from moving, and when the butterfly plate 2 is closed, the docking groove 12 and the valve sealing ring 3 are in a cross-fitting state to improve the sealing Type, the surface of the main valve body 1 is respectively provided with a first mounting cylinder 4 and a second mounting cylinder 5, the first mounting cylinder 4 is provided with a driving valve shaft 6, the inner wall of the second mounting cylinder 5 is provided with a supporting valve shaft 7, the butterfly plate 2 is symmetrically provided with mounting parts 8, the inner walls of the two mounting parts 8 are respectively connected to one end of the driving valve shaft 6 and one end of the supporting valve shaft 7, the inner walls of the first mounting cylinder 4 and the second mounting cylinder 5 are both provided with a first shaft sealing ring 9, the inner walls of the two mounting parts 8 are both provided with a second shaft sealing ring 10, and the two second shaft sealing rings 10 are respectively connected to the surface of the driving valve shaft 6 and the surface of the supporting valve shaft 7.

[0025] A through hole 13 is provided on the surface of the driving valve shaft 6, and a first fixing seat 14 is provided on the surface of the mounting portion 8 for docking the driving valve shaft 6. A fixing pin 15 is installed on the inner wall of the first fixing seat 14, and one end of the fixing pin 15 extends to the inner wall of the through hole 13. A blind hole 16 is provided on the surface of the supporting valve shaft 7, and a second fixing seat 17 is provided on the surface of the mounting portion 8 for docking the supporting valve shaft 7. A positioning pin 18 is installed on the inner wall of the second fixing seat 17, and one end of the positioning pin 18 extends to the inner wall of the blind hole 16. The inner walls of the first fixing seat 14 and the second fixing seat 17 are both plugged with rust-proof sealing plugs 19. When the fixing pin 15 is used to install the driving valve shaft 6 and the positioning pin 18 is docked to the supporting valve shaft 7, the rust-proof sealing plugs 19 are installed on the top ends of the inner holes of the first fixing seat 14 and the second fixing seat 17 on the butterfly plate 2, which can prevent the water medium from entering the through hole 13 where the fixing pin 15 is placed and the blind hole 16 where the positioning pin 18 is placed, so as to prevent the generation of rust water.

[0026] See also Figure 4-5 The inner walls of the first mounting tube 4 and the second mounting tube 5 are both provided with a first fixing groove 20, and the two first shaft sealing rings 9 are respectively installed on the inner walls of the two first fixing grooves 20. The inner walls of the inner walls of the two mounting parts 8 are both provided with a second fixing groove 21, and the two second shaft sealing rings 10 are respectively installed on the inner walls of the two second fixing grooves 21. The first fixing groove 20 fixes the position of the first shaft sealing ring 9, and the second fixing groove 21 fixes the position of the second shaft sealing ring 10 to prevent the positions of the first shaft sealing ring 9 and the second shaft sealing ring 10 from shifting. A rotating sleeve 22 is arranged between the first mounting tube 4 and the driving valve shaft 6 and between the second mounting tube 5 and the supporting valve shaft 7.

[0027] The first shaft sealing ring 9 is used to seal between the first mounting cylinder 4 and the driving valve shaft 6, as well as between the second mounting cylinder 5 and the supporting valve shaft 7. The two mounting parts 8 of the butterfly plate 2 respectively seal the gap between the driving valve shaft 6 and the supporting valve shaft 7 through two second shaft sealing rings 10, thereby blocking the water medium from entering the shaft hole, which can effectively prevent the shaft hole from rusting and prevent rusty water from polluting the pipeline water source. Anti-rust sealing plugs 19 are installed on the top of the inner holes of the first fixing seat 14 and the second fixing seat 17 on the butterfly plate 2, which can block the water medium from entering the through hole 13 for the fixing pin 15 and the blind hole 16 for the positioning pin 18, thereby preventing the generation of rusty water.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve with a rust-proof structure, characterized in that: include: A main valve body (1) and a butterfly plate (2) for isolation, wherein the butterfly plate (2) is installed inside the main valve body (1), and a valve sealing ring (3) is provided between the butterfly plate (2) and the main valve body (1); The surface of the main valve body (1) is respectively provided with a first mounting cylinder (4) and a second mounting cylinder (5), a driving valve shaft (6) is mounted on the first mounting cylinder (4), a supporting valve shaft (7) is mounted on the inner wall of the second mounting cylinder (5), mounting portions (8) are symmetrically arranged on the upper surface of the butterfly plate (2), and the inner walls of the two mounting portions (8) are respectively connected to one end of the driving valve shaft (6) and one end of the supporting valve shaft (7); The inner walls of the first mounting tube (4) and the second mounting tube (5) are both installed with a first shaft sealing ring (9), the inner walls of the two mounting parts (8) are both installed with a second shaft sealing ring (10), and the two second shaft sealing rings (10) are respectively connected to the surface of the driving valve shaft (6) and the surface of the supporting valve shaft (7).

2. The butterfly valve with rust-proof structure according to claim 1, characterized in that: The inner wall of the main valve body (1) is provided with a mounting groove (11), the surface of the butterfly plate (2) is provided with a docking groove (12), the valve sealing ring (3) is mounted on the inner wall of the mounting groove (11), and the valve sealing ring (3) is connected to the inner wall of the docking groove (12).

3. The butterfly valve with rust-proof structure according to claim 1, characterized in that: A through hole (13) is provided on the surface of the driving valve shaft (6), and a first fixing seat (14) is provided on the surface of the mounting portion (8) that is connected to the driving valve shaft (6). A fixing pin (15) is installed on the inner wall of the first fixing seat (14), and one end of the fixing pin (15) extends to the inner wall of the through hole (13).

4. The butterfly valve with rust-proof structure according to claim 3, characterized in that: A blind hole (16) is provided on the surface of the supporting valve shaft (7), a second fixing seat (17) is provided on the surface of the mounting portion (8) that is connected to the supporting valve shaft (7), a positioning pin (18) is installed on the inner wall of the second fixing seat (17), and one end of the positioning pin (18) extends to the inner wall of the blind hole (16).

5. The butterfly valve with rust-proof structure according to claim 4, characterized in that: The inner walls of the first fixing seat (14) and the second fixing seat (17) are both plugged with rust-proof sealing plugs (19).

6. The butterfly valve with rust-proof structure according to claim 1, characterized in that: The inner walls of the first mounting tube (4) and the second mounting tube (5) are each provided with a first fixing groove (20), and the two first shaft sealing rings (9) are respectively mounted on the inner walls of the two first fixing grooves (20); the inner walls of the two mounting portions (8) are each provided with a second fixing groove (21), and the two second shaft sealing rings (10) are respectively mounted on the inner walls of the two second fixing grooves (21).

7. The butterfly valve with rust-proof structure according to claim 1, characterized in that: A rotating shaft sleeve (22) is provided between the first mounting cylinder (4) and the driving valve shaft (6), and between the second mounting cylinder (5) and the supporting valve shaft (7).

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