Gapless wafer type knife gate valve

Abstract

The utility model discloses a gapless wafer type knife gate valve which comprises a top plate, a protective cover is fixedly connected to the lower end of the top plate, an air cylinder is arranged at the upper end of the top plate, the output end of the air cylinder penetrates through the top plate to be fixedly connected with a valve plate, the valve plate is movably connected to the inner side of the protective cover, and a connecting plate is fixedly connected to the lower end of the protective cover. A valve body is arranged at the lower end of the connecting plate, two sets of symmetrical rubber rings are arranged on the inner side of the valve body, wear-resisting rings are arranged on the opposite sides of the two sets of rubber rings and are made of silicon carbide or aluminum oxide ceramic materials, the valve plate is movably connected between the two sets of wear-resisting rings, flanges are arranged at the front end and the rear end of the valve body, and the valve plate is movably connected between the two sets of wear-resisting rings. And the lower end of the valve body is fixedly connected with a lower cover. Compared with a common knife gate valve, the gapless wafer type knife gate valve has the advantages of being more wear-resistant, free of being blocked by particulate matter and the like, and the service life is prolonged to a greater extent due to the fact that the wear-resistant rubber ring can be replaced independently.

Description

Technical Field

[0001] The utility model relates to the technical field of knife-type gate valves, in particular to a gapless clamp-type knife-type gate valve. Background Art

[0002] Gapless wafer knife gate valves are widely used in places with harsh surrounding environments. The cut-off media in the valves are various slurries, fluids containing solid particles, and corrosive materials, etc. Among them, pneumatic control and electric control can more conveniently realize remote operation, reduce and avoid the way for operators to be contaminated, and the opening and closing are fast, which provides convenient conditions for realizing system operation automation.

[0003] As the valve plate is constantly opened and used, some fluids containing impurities will affect the use effect and life of the valve plate, causing wear and blockage on the valve plate. To solve the above problems, we have proposed a gapless clamp-type knife-type gate valve. Utility Model Content

[0004] The main purpose of the utility model is to provide a gapless clamp-type knife-type gate valve, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A gapless clamp-type knife-type gate valve comprises a top plate, a protective cover is fixedly connected to the lower end of the top plate, a cylinder is arranged on the upper end of the top plate, an output end of the cylinder passes through the top plate and is fixedly connected to a valve plate, the valve plate is movably connected to the inner side of the protective cover, a connecting plate is fixedly connected to the lower end of the protective cover, a valve body is arranged at the lower end of the connecting plate, two groups of mutually symmetrical rubber rings are arranged on the inner side of the valve body, wear-resistant rings are arranged on opposite sides of the two groups of rubber rings, the wear-resistant rings are made of silicon carbide or alumina ceramic, the valve plate is movably connected between the two groups of wear-resistant rings, flanges are arranged on the front and rear ends of the valve body, and a lower cover is fixedly connected to the lower end of the valve body.

[0007] Preferably, both sides of the shield are fixedly connected with oil nozzles, the upper end of the oil nozzle is movably connected with a cover, both sides of the shield are provided with connecting holes, and the oil nozzle is connected with the connecting holes.

[0008] Preferably, two groups of connecting strips are fixedly connected to the inner side of the shield, the valve plate is movably connected between the two groups of connecting strips, and oil grooves are provided on opposite sides of the two groups of connecting strips, and the oil nozzle passes through the connecting hole and is connected to the oil groove.

[0009] Preferably, two groups of first fixing strips are commonly provided at the upper ends of the two groups of connecting strips, the two groups of first fixing strips are symmetrical to each other, and first sliding grooves are provided on opposite sides of the two groups of first fixing strips.

[0010] Preferably, two groups of second fixing strips are commonly provided at the lower ends of the two groups of connecting strips, the two groups of second fixing strips are symmetrical to each other, and second sliding grooves are opened on the opposite sides of the two groups of second fixing strips, and one side of the valve plate slides together on the inner sides of the first sliding groove and the second sliding groove.

[0011] Preferably, a connecting groove 1 is opened on the inner side of the connecting plate, a packing gland is movably connected to the inner side of the connecting groove 1, a connecting groove 2 is opened on the inner side of the packing gland, and the valve plate is matched with the connecting groove 2.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the gapless clamped knife gate valve cuts off the fluid to increase the compression of the valve, thereby increasing the sealing force between the valve plate and the rubber ring, that is, maintaining the sealing of the valve plate without affecting the opening and closing of the valve plate. Compared with ordinary knife gate valves, the wear-resistant rings made of silicon carbide or alumina ceramics have the advantages of being more wear-resistant and not being blocked by particles. The service life of such a composite is extended by 5-10 times compared with pure wear-resistant rubber. In addition, the wear-resistant rubber ring can be replaced separately, which greatly increases the service life. As long as it is properly maintained, it can achieve "unlimited use". BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a gapless clamp-type knife-type gate valve of the utility model;

[0014] Figure 2 It is a partial structural schematic diagram of a gapless clamp-type knife-type gate valve of the utility model;

[0015] Figure 3 This is a partial structural section of a gapless clamp-type knife-type gate valve of the utility model. Figure 1 ;

[0016] Figure 4 This is a partial structural section of a gapless clamp-type knife-type gate valve of the utility model. Figure 2 ;

[0017] Figure 5 It is a partial structural exploded diagram of a gapless clamp-type knife-type gate valve of the utility model;

[0018] Figure 6 This is a partial structural section of a gapless clamp-type knife-type gate valve of the utility model. Figure 3 ;

[0019] Figure 7 It is an enlarged schematic diagram of the structure of part A of a gapless clamp-type knife-type gate valve of the utility model.

[0020] In the figure: 1. top plate; 2. protective cover; 3. oil nozzle; 4. cover; 5. cylinder; 6. connecting strip; 7. valve plate; 8. oil groove; 9. first fixing strip; 10. second fixing strip; 11. connecting plate; 12. connecting groove 1; 13. packing gland; 14. connecting groove 2; 15. valve body; 16. rubber ring; 17. flange; 18. lower cover; 19. wear-resistant ring. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-7 As shown, a gapless clamp-type knife-type gate valve comprises a top plate 1, a shield 2 is fixedly connected to the lower end of the top plate 1, a cylinder 5 is arranged on the upper end of the top plate 1, an output end of the cylinder 5 passes through the top plate 1 and is fixedly connected to a valve plate 7, the valve plate 7 is movably connected to the inner side of the shield 2, a connecting plate 11 is fixedly connected to the lower end of the shield 2, a valve body 15 is arranged at the lower end of the connecting plate 11, two groups of mutually symmetrical rubber rings 16 are arranged on the inner side of the valve body 15, wear-resistant rings 19 are arranged on the opposite sides of the two groups of rubber rings 16, the wear-resistant rings 19 are made of silicon carbide or alumina ceramic, the valve plate 7 is movably connected between the two groups of wear-resistant rings 19, flanges 17 are arranged at the front and rear ends of the valve body 15, and a lower cover 18 is fixedly connected to the lower end of the valve body 15.

[0023] In this embodiment, both sides of the shield 2 are fixedly connected with oil nozzles 3, and the upper end of the oil nozzle 3 is movably connected with a cover 4. Both sides of the shield 2 are provided with connecting holes, and the oil nozzle 3 is connected with the connecting holes. Two groups of connecting strips 6 are fixedly connected to the inner side of the shield 2, and the valve plate 7 is movably connected between the two groups of connecting strips 6. The two groups of connecting strips 6 are provided with oil grooves 8 on the opposite sides, and the oil nozzle 3 passes through the connecting holes and is connected with the oil groove 8.

[0024] Specifically, wear-resistant rings made of silicon carbide or alumina ceramics are relatively common wear-resistant materials in fluid wear resistance. By opening the cover 4 and injecting grease into the inner side of the oil nozzle 3, the grease flows into the inner side of the oil groove 8 through the connecting hole, so that the grease contacts the valve plate 7, reducing the friction of the valve plate 7 and reducing the axial force during lifting.

[0025] In this embodiment, two groups of first fixing bars 9 are commonly provided at the upper ends of the two groups of connecting bars 6, the two groups of first fixing bars 9 are symmetrical to each other, and the first sliding grooves are opened on the opposite sides of the two groups of first fixing bars 9, and two groups of second fixing bars 10 are commonly provided at the lower ends of the two groups of connecting bars 6, the two groups of second fixing bars 10 are symmetrical to each other, and the second sliding grooves are opened on the opposite sides of the two groups of second fixing bars 10, and one side of the valve plate 7 slides together on the inner sides of the first sliding groove and the second sliding groove.

[0026] Specifically, the valve plate 7 slides on the inner side of the first slide groove and the second slide groove, and the movement path of the valve plate 7 is restricted under the clamping of the first slide groove and the second slide groove to prevent the position of the valve plate 7 from shifting during opening and closing. The valve plate 7 is made of stainless steel.

[0027] In this embodiment, a connecting groove 12 is provided on the inner side of the connecting plate 11 , a packing gland 13 is movably connected to the inner side of the connecting groove 12 , a connecting groove 2 14 is provided on the inner side of the packing gland 13 , and the valve plate 7 fits with the connecting groove 2 14 .

[0028] Specifically, the packing gland 13 is movably connected to the connecting plate 11 through a spring. When the valve plate 7 moves downward through the connecting groove 2 14, the output end of the cylinder 5 moves downward to press the packing gland 13 into the inner side of the connecting groove 12 to ensure the sealing performance. When the valve plate 7 is closed, the elasticity of the rubber ring 16 is utilized, and the valve plate 7 is inserted between the two sets of wear-resistant rings 19 and fits tightly therewith.

[0029] It should be noted that the utility model is a gapless clamp-type knife-type gate valve. When the valve body 15 is opened, the valve plate 7 is pulled out from between the two groups of wear-resistant rings 19 under the drive of the cylinder 5. The two groups of high-wear-resistant rubber rings 16 set in the inner lining of the valve channel, due to the unique elastic force of rubber and the pressure difference of the front and rear end flanges 17, make the valve sealing surface tightly combined to form an integral channel, and the fluid cannot accumulate sediment in the valve body when passing. When the valve plate 7 is closed, the elasticity of the rubber ring 16 is used to insert the valve plate 7 between the two groups of wear-resistant rings 19. Both sides of the shield 2 are provided with oil nozzles 3 for injecting grease. The cover 4 is opened, and grease is injected into the inner side of the oil nozzle 3. The grease flows into the inner side of the oil groove 8 along the connecting hole, so that the grease contacts the valve plate 7, reduces the friction of the valve plate 7, and reduces the axial force during lifting.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gapless clamp-type knife gate valve, comprising a top plate (1), characterized in that: The lower end of the top plate (1) is fixedly connected to a protective cover (2), the upper end of the top plate (1) is provided with a cylinder (5), the output end of the cylinder (5) passes through the top plate (1) and is fixedly connected to a valve plate (7), the valve plate (7) is movably connected to the inner side of the protective cover (2), the lower end of the protective cover (2) is fixedly connected to a connecting plate (11), the lower end of the connecting plate (11) is provided with a valve body (15), the inner side of the valve body (15) is provided with two groups of mutually symmetrical rubber rings (16), the opposite sides of the two groups of rubber rings (16) are provided with wear-resistant rings (19), the wear-resistant rings (19) are made of silicon carbide or alumina ceramic, the valve plate (7) is movably connected between the two groups of wear-resistant rings (19), the front and rear ends of the valve body (15) are provided with flanges (17), and the lower end of the valve body (15) is fixedly connected with a lower cover (18).

2. A gapless wafer-type knife gate valve according to claim 1, characterized in that: Both sides of the protective cover (2) are fixedly connected with oil nozzles (3), the upper end of the oil nozzle (3) is movably connected with a cover (4), and both sides of the protective cover (2) are provided with connection holes, and the oil nozzle (3) is connected with the connection holes.

3. A gapless wafer-type knife gate valve according to claim 2, characterized in that: Two groups of connecting strips (6) are fixedly connected to the inner side of the protective cover (2), and the valve plate (7) is movably connected between the two groups of connecting strips (6). Oil grooves (8) are provided on opposite sides of the two groups of connecting strips (6), and the oil nozzle (3) passes through the connecting hole and is connected to the oil groove (8).

4. A gapless wafer-type knife gate valve according to claim 3, characterized in that: Two groups of first fixing strips (9) are commonly arranged at the upper ends of the two groups of connecting strips (6), the two groups of first fixing strips (9) are symmetrical to each other, and first sliding grooves are provided on opposite sides of the two groups of first fixing strips (9).

5. The gapless wafer-type knife gate valve according to claim 3 is characterized in that: Two groups of second fixing strips (10) are commonly provided at the lower ends of the two groups of connecting strips (6), the two groups of second fixing strips (10) are symmetrical to each other, and second sliding grooves are provided on opposite sides of the two groups of second fixing strips (10), and one side of the valve plate (7) slides together on the inner sides of the first sliding groove and the second sliding groove.

6. The gapless wafer-type knife gate valve according to claim 1 is characterized in that: A connecting groove 1 (12) is provided on the inner side of the connecting plate (11), a packing gland (13) is movably connected to the inner side of the connecting groove 1 (12), a connecting groove 2 (14) is provided on the inner side of the packing gland (13), and the valve plate (7) is matched with the connecting groove 2 (14).

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