Slurry knife gate valve

Abstract

The utility model discloses a slurry knife gate valve which comprises a valve body, a gate plate and a screw rod, the gate plate is arranged in the valve body in a sliding mode, one end of the screw rod is matched with the gate plate, the slurry knife gate valve further comprises valve seats, the valve seats are arranged in the valve body, the number of the valve seats is not less than two, and the valve seats are arranged on the two sides of the gate plate; the valve seat comprises a J-shaped steel plate, a flat plate and a rubber sleeve, the J-shaped steel plate and the flat plate are both arranged in the rubber sleeve, and the rubber sleeve is used for being tightly matched with the gate plate. The slurry knife gate valve has the advantages that flexible sealing between the valve body and the gate plate is achieved, and the sealing effect between the valve body and the gate plate is ensured.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a slurry knife gate valve. Background Art

[0002] The slurry knife gate valve is a commonly used valve at present. The patent announcement document CN218000445U discloses a slurry knife gate valve. The slurry knife gate valve with this structure relies on the valve body (the figure numbered 1 in the document) and the gate plate (the figure numbered 7 in the document) for sealing. Since the valve body is a rigid body and the gate plate is also a rigid body, a sealing gap will inevitably appear between the two rigid bodies when they are tightly sealed. Therefore, the sealing performance of the slurry knife gate valve with this structure is relatively poor. Utility Model Content

[0003] In view of the above problems, the utility model proposes a slurry knife gate valve. In the slurry knife gate valve, rubber sleeves are arranged on both sides of the gate plate to achieve flexible sealing between the valve body and the gate plate, and the sealing effect is better.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A slurry knife gate valve comprises a valve body, a gate plate and a screw, wherein the gate plate is slidably arranged in the valve body, one end of the screw rod is matched with the gate plate, and also comprises a valve seat, wherein the valve seat is arranged in the valve body, and the number of the valve seats is not less than 2, and the valve seats are arranged on both sides of the gate plate; the valve seat comprises a J-shaped steel plate, a flat plate and a rubber sleeve, wherein the J-shaped steel plate and the flat plate are arranged in the rubber sleeve, and the rubber sleeve is used to fit tightly with the gate plate.

[0006] In this type of knife gate valve, since valve seats are arranged on both sides of the gate plate, and the valve seats are composed of J-shaped steel plates, flat plates and rubber sleeves, the valve seats can maintain their shape and have a certain ability to adapt to deformation. Therefore, in this type of knife gate valve, since both sides of the gate plate are flexible valve seats, a flexible seal between the valve body and the gate plate is achieved, ensuring the sealing effect between the valve body and the gate plate.

[0007] Optionally, a double-sided blade structure is provided at one end of the gate plate.

[0008] The blade structure can reduce the resistance encountered by the gate during its movement and can also clean up foreign matter attached to the valve seat in time.

[0009] Optionally, a connecting sleeve is also included, and two ends of the connecting sleeve are respectively matched with the gate plate and the screw.

[0010] The function of the connecting sleeve is to connect the gate and the screw.

[0011] Optionally, it also includes a first connecting bolt, a second connecting bolt, a first nut and a second nut, the first nut is installed on the first connecting bolt, the second nut is installed on the second connecting bolt, the gate plate and the connecting sleeve are matched together through the first connecting bolt and the first nut, the screw rod and the connecting sleeve are matched together through the second connecting bolt and the second nut, and the first nut and the second nut are both nuts made of nylon material.

[0012] Specifically, both the first nut and the second nut are nylon anti-loosening nuts, which can improve the matching stability between the first nut and the first connecting bolt and the matching stability between the second nut and the second connecting bolt.

[0013] Optionally, it also includes a dust cover and a bracket, wherein the bracket is fixedly disposed on the valve body, the dust cover is sleeved on the screw, and one end of the dust cover is fixed to the bracket, and the other end of the dust cover is fixed to the screw, and the dust cover is a telescopic dust cover.

[0014] The function of the dust cover is to protect the screw.

[0015] Optionally, the bracket is matched with the valve body through mounting nuts and mounting bolts.

[0016] Optionally, one end of the dust cover is fixed to the screw rod through a clamp, and the other end of the dust cover is matched with a connecting flange on the bracket.

[0017] Optionally, a locking pin is further included, the gate plate is provided with a plate limiting hole, the bracket is provided with a frame limiting hole, and the locking pin is used to cooperate with the plate limiting hole and the frame limiting hole.

[0018] Optionally, a retaining ring is further included, wherein the retaining ring is installed in the valve body through an internal mounting screw, and the retaining ring is tightly attached to the valve seat.

[0019] The function of the retaining ring is to support the valve seat.

[0020] Optionally, a retaining flange is further included, wherein the retaining flange is arranged on the valve body by means of external mounting screws, retaining flanges are installed on both sides of the valve body, and the retaining flanges are used to fit tightly against the valve seat.

[0021] The function of the retaining flange is to stably fix the valve seat in the valve body.

[0022] The beneficial effects of the utility model are: achieving flexible sealing between the valve body and the gate plate, and ensuring the sealing effect between the valve body and the gate plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a slurry knife gate valve;

[0024] Figure 2 It is a schematic diagram showing the matching relationship between the screw and the gate;

[0025] Figure 3 It is a schematic diagram of the valve seat structure;

[0026] Figure 4 It is a schematic diagram of the position of the plate limit hole on the gate plate;

[0027] Figure 5 It is a schematic diagram of the position of the blade structure on the gate;

[0028] Figure 6 It is a schematic diagram of the bracket structure.

[0029] The reference numerals in the figure are: 1. valve body; 2. gate; 201. plate limiting hole; 202. blade structure; 3. valve seat; 301. J-shaped steel plate; 302. flat plate; 303. rubber sleeve; 4. retaining ring; 5. packing; 6. gland; 7. connecting sleeve; 8. screw; 9. bracket; 901. bracket limiting hole; 10. connecting flange; 11. dust cover; 12. clamp; 13. retaining flange; 14. external mounting screw; 15. mounting bolt; 16. mounting nut; 17. first connecting bolt; 18. second connecting bolt; 19. second nut; 20. first nut; 21. locking pin; 22. padlock; 23. gasket; 24. bottom plate; 25. sealing screw; 26. internal mounting screw. DETAILED DESCRIPTION

[0030] The utility model is described in detail below in conjunction with the accompanying drawings.

[0031] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, a slurry knife gate valve comprises a valve body 1, a gate plate 2 and a screw 8. The gate plate 2 is slidably arranged in the valve body 1. One end of the screw 8 cooperates with the gate plate 2. The valve seat 3 is arranged in the valve body 1. There are at least two valve seats 3. Both sides of the gate plate 2 are provided with valve seats 3. The valve seat 3 (the structure of which can be seen in the attached figure) is provided with a valve seat 3. Figure 3 ) includes a J-shaped steel plate 301, a flat plate 302 and a rubber sleeve 303, wherein the J-shaped steel plate 301 and the flat plate 302 are both arranged in the rubber sleeve 303, and the rubber sleeve 303 is used to fit tightly with the gate plate 2.

[0032] In this knife gate valve, since valve seats 3 are arranged on both sides of the gate plate 2, and the valve seats 3 are composed of a J-shaped steel plate 301, a flat plate 302 and a rubber sleeve 303, the valve seats 3 can maintain their shape and have a certain ability to adapt to deformation. Therefore, in this knife gate valve, since both sides of the gate plate 2 are flexible valve seats 3, a flexible seal between the valve body 1 and the gate plate 2 is achieved, thereby ensuring the sealing effect between the valve body 1 and the gate plate 2.

[0033] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, a double-sided blade structure 202 is provided at one end of the gate plate 2 .

[0034] The blade structure 202 can reduce the resistance encountered by the gate plate 2 during its movement, and can also clean foreign matter attached to the valve seat 3 in time.

[0035] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, it also includes a connecting sleeve 7, and two ends of the connecting sleeve 7 are respectively matched with the gate plate 2 and the screw rod 8.

[0036] The function of the connecting sleeve 7 is to connect the gate plate 2 and the screw rod 8 .

[0037] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, it also includes a first connecting bolt 17, a second connecting bolt 18, a first nut 20 and a second nut 19. The first nut 20 is installed on the first connecting bolt 17, and the second nut 19 is installed on the second connecting bolt 18. The gate plate 2 and the connecting sleeve 7 are matched together through the first connecting bolt 17 and the first nut 20, and the screw rod 8 and the connecting sleeve 7 are matched together through the second connecting bolt 18 and the second nut 19. The first nut 20 and the second nut 19 are both nuts made of nylon.

[0038] Specifically, both the first nut 20 and the second nut 19 are nylon anti-loosening nuts, which can improve the matching stability between the first nut 20 and the first connecting bolt 17 and the matching stability between the second nut 19 and the second connecting bolt 18.

[0039] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, it also includes a dust cover 11 and a bracket 9. The bracket 9 is fixedly arranged on the valve body 1. The dust cover 11 is sleeved on the screw 8. One end of the dust cover 11 is fixed to the bracket 9, and the other end of the dust cover 11 is fixed to the screw 8. The dust cover 11 is a telescopic dust cover 11.

[0040] The function of the dust cover 11 is to protect the screw rod 8. Specifically, the dust cover 11 can be made of wear-resistant nylon cloth.

[0041] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, the bracket 9 is matched with the valve body 1 through the mounting nut 16 and the mounting bolt 15.

[0042] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, one end of the dust cover 11 is fixed to the screw rod 8 through a clamp 12 , and the other end of the dust cover 11 is matched with the connecting flange 10 on the bracket 9 .

[0043] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, it also includes a locking pin 21 , a plate limiting hole 201 is provided on the gate plate 2 , and a frame limiting hole 901 is provided on the bracket 9 , and the locking pin 21 is used to cooperate with the plate limiting hole 201 and the frame limiting hole 901 .

[0044] When the lock pin 21 is plugged into the frame limiting hole 901 and the plate limiting hole 201, it is equivalent to using the lock pin 21 to temporarily lock the gate plate 2 and the bracket 9 together. When the lock pin 21 is pulled out of the frame limiting hole 901 and the plate limiting hole 201, it is equivalent to unlocking the gate plate 2 and the bracket 9, and the gate plate 2 can slide freely relative to the bracket 9. In order to maintain the stability of the lock pin 21 during the locking operation and prevent the lock pin 21 from slipping, a padlock 22 can be provided on the lock pin 21.

[0045] See attached Figure 6As shown in , there are four frame limit holes 901 on the bracket 9, which are respectively located at the upper and lower ends of the frame body, so that the gate plate 2 can be locked at the upper and lower extreme positions respectively.

[0046] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, the valve body 1 further includes a retaining ring 4 , which is installed in the valve body 1 through internal mounting screws 26 , and the retaining ring 4 is tightly attached to the valve seat 3 .

[0047] The function of the retaining ring 4 is to support the valve seat 3 .

[0048] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6 As shown, it also includes a retaining flange 13, which is arranged on the valve body 1 through external mounting screws 14. The retaining flanges 13 are installed on both sides of the valve body 1, and the retaining flanges 13 are used to close to the valve seat 3.

[0049] The function of the retaining flange 13 is to stably fix the valve seat 3 in the valve body 1 .

[0050] For details, please refer to the attached Figure 2 As shown in the figure, the bottom of the valve body 1 is sealed with a gasket 23 and a bottom plate 24, and the bottom plate 24 and the gasket 23 are installed on the valve body 1 through sealing screws 25. When cleaning is required, only the gasket 23 and the bottom plate 24 need to be removed to clean the valve body 1.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A slurry knife gate valve, comprising a valve body, a gate plate and a screw, wherein the gate plate is slidably arranged in the valve body, and one end of the screw rod is matched with the gate plate, characterized in that: It also includes a valve seat, which is arranged in the valve body, and the number of the valve seats is not less than 2, and the valve seats are arranged on both sides of the gate plate; the valve seat includes a J-shaped steel plate, a flat plate and a rubber sleeve, and the J-shaped steel plate and the flat plate are both arranged in the rubber sleeve, and the rubber sleeve is used to fit tightly with the gate plate.

2. The slurry knife gate valve according to claim 1, characterized in that: One end of the gate plate is provided with a double-sided blade structure.

3. The slurry knife gate valve according to claim 1, characterized in that: It also includes a connecting sleeve, and two ends of the connecting sleeve are respectively matched with the gate plate and the screw rod.

4. The slurry knife gate valve according to claim 2, characterized in that: It also includes a first connecting bolt, a second connecting bolt, a first nut and a second nut. The first nut is installed on the first connecting bolt, and the second nut is installed on the second connecting bolt. The gate plate and the connecting sleeve are matched together through the first connecting bolt and the first nut, and the screw rod and the connecting sleeve are matched together through the second connecting bolt and the second nut. The first nut and the second nut are both nuts made of nylon.

5. The slurry knife gate valve according to claim 1, characterized in that: It also includes a dust cover and a bracket, wherein the bracket is fixedly arranged on the valve body, the dust cover is sleeved on the screw, and one end of the dust cover is fixed to the bracket, and the other end of the dust cover is fixed to the screw, and the dust cover is a telescopic dust cover.

6. The slurry knife gate valve according to claim 5, characterized in that: The bracket is matched with the valve body through mounting nuts and mounting bolts.

7. The slurry knife gate valve according to claim 5, characterized in that: One end of the dust cover is fixed to the screw rod through a clamp, and the other end of the dust cover is matched with the connecting flange on the bracket.

8. The slurry knife gate valve according to claim 5, characterized in that: It also includes a locking pin. The gate plate is provided with a plate limiting hole, and the bracket is provided with a frame limiting hole. The locking pin is used to cooperate with the plate limiting hole and the frame limiting hole.

9. The slurry knife gate valve according to claim 1, characterized in that: It also includes a retaining ring, which is installed in the valve body through internal mounting screws, and the retaining ring is tightly attached to the valve seat.

10. The slurry knife gate valve according to claim 1, characterized in that: It also includes a retaining flange, which is arranged on the valve body through external mounting screws. Retaining flanges are installed on both sides of the valve body, and the retaining flanges are used to close to the valve seat.

Images