Knife gate valve for solid particle materials

Abstract

The utility model relates to the technical field of knife gate valves, in particular to a knife gate valve for solid particle materials, which comprises a knife gate valve body, a gate plate is slidably connected to the inner wall of the knife gate valve body, a lead screw is arranged at the upper end of the gate plate, a driving device is arranged on the upper surface of a first flange, and the driving device is in threaded connection with the lead screw. Two sealing valve seats are connected to the lower inner wall of the channel in a sliding mode, and abutting devices are arranged on the surfaces of the opposite sides of the two sealing valve seats. According to the abutting device, when the flashboard moves downwards, the two sealing valve seats are ejected open through the two notches, the two sealing valve seats abut against the flashboard under the action of the compression force of the spring, the sealing valve seats can be abraded when the knife gate valve is opened and closed for a long time, the abrasion loss can be compensated through the action of the compression force of the spring, and therefore the knife gate valve is prevented from being damaged. The two sealing valve seats and the gate plate are tightly sealed, and the sealing performance of the knife gate valve is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of knife gate valve especially relates to a kind of for solid granular material's knife gate valve. BACKGROUND

[0002] Knife gate valve enters our country from eight decades, in less than twenty years, its use range expands from ordinary field to more extensive each industry, from coal separation of mine power plant, gangue, slag, development to city's sewage treatment, from general industrial pipeline to food, health, medicine and other professional pipeline system.

[0003] For example, the authorized announcement number "CN202501028U" is named one-way sealing knife gate valve, although the sealing valve seat and wedge block valve seat can be matched with more wear-resistant material with greater hardness, the two valve seats have replaceability, even if valve seat is damaged, it will not cause the scrapping of the whole valve.But, the knife gate valve is long-term opening and closing, can cause the wear of sealing valve seat and wedge block valve seat, lead to sealing, affect the sealing property of knife gate valve. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in prior art, and proposes a kind of for solid granular material's knife gate valve.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Design a kind of for solid granular material's knife gate valve, including knife gate valve body, the lower part of the knife gate valve body is equipped with passageway, the inner wall of the knife gate valve body is slidably connected with gate plate, the upper end of the gate plate is equipped with lead screw, the upper end of the knife gate valve body is equipped with first flange, the upper surface of the first flange is equipped with driving device, the driving device is threadedly connected with lead screw, the lower inner wall of the passageway is slidably connected with two sealing valve seats, the side surface of the two sealing valve seats opposite each other is equipped with abutting device, the end of the two sealing valve seats close to each other is equipped with notch, the lower end of the gate plate is equipped with sharp head, the two notches are matched with sharp head.

[0007] Preferably, the driving device includes second flange, the second flange is connected with first flange by bolt, the upper surface of the second flange is equipped with multiple vertical rods, the upper end of multiple vertical rods is equipped with bearing block, the upper end of the bearing block is equipped with driving motor, the output shaft of the driving motor penetrates bearing block and is equipped with rotating frame, the rotating frame is threadedly connected with lead screw.

[0008] Preferably, the abutting device includes mounting block arranged on the side surface of knife gate valve body, the surface of the mounting block is slidably connected with limit rod, the end of the limit rod away from the knife gate valve body is equipped with end block, the spring is arranged between the end block and mounting block.

[0009] Preferably, the inner wall of the channel is provided with two symmetrical T-shaped grooves, two T-shaped blocks are slidably connected in the two T-shaped grooves, and the upper ends of the two T-shaped blocks in the same T-shaped groove are connected to the lower surface of the same sealing valve seat.

[0010] Preferably, the lower surface of the knife gate valve body is provided with a fan, the upper end of the fan is communicated with an air path, the lower inner wall of each of the two T-shaped grooves is provided with an air outlet, and the lower end of the air outlet is communicated with the air path.

[0011] Preferably, the lower inner wall of the channel is provided with a V-shaped groove matched with the sharp head.

[0012] The utility model provides a kind of knife gate valve for solid particle material, and beneficial effect is that: when gate plate moves downward, the two sealing valve seats are compressed by spring force, and the two sealing valve seats are tightly pressed to gate plate, the knife gate valve is opened and closed for a long time, and the sealing valve seat is abraded, and the abrasion amount is compensated by spring compression force, so that the two sealing valve seats and gate plate are sealed tightly, and the sealing property of the knife gate valve is not affected.The driving device is started, the output shaft is rotated to drive the rotary frame to rotate, the rotary frame is threadedly connected with the lead screw, and the gate plate is slidably connected with the inner wall of the knife gate valve body, so that the gate plate can be raised or lowered, and the opening or closing of the knife gate valve is realized. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the overall structure schematic diagram of the utility model;

[0014] Figure 2 It is the sectional structure schematic diagram of the utility model in closed state;

[0015] Figure 3 It is the sectional structure schematic diagram of the utility model in open state;

[0016] Figure 4 It is the A position enlarged view of the utility model.

[0017] In the drawing: knife gate valve body 1, channel 2, gate plate 3, lead screw 4, first flange 5, sealing valve seat 6, notch 7, sharp head 8, second flange 9, vertical rod 10, bearing block 11, driving motor 12, rotary frame 13, mounting block 14, limiting rod 15, end block 16, spring 17, T-shaped groove 18, T-shaped block 19, fan 20, air path 21, air outlet 22, V-shaped groove 23. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely part of the embodiments of the present utility model, rather than all the embodiments.

[0019] With reference to Figures 1-4 A kind of knife gate valve for solid particle material, including knife gate valve body 1, the lower part of knife gate valve body 1 is equipped with passageway 2, slidingly connected with gate 3 in the inner wall of knife gate valve body 1, the upper end of gate 3 is equipped with screw rod 4, the upper end of knife gate valve body 1 is equipped with first flange 5, the upper surface of first flange 5 is equipped with driving device, driving device is threadedly connected with screw rod 4, two sealing valve seats 6 are slidingly connected in the inner wall of passageway 2, the side surface of the opposite side of two sealing valve seats 6 is equipped with abutting device, the end of two sealing valve seats 6 close to each other is equipped with notch 7, the lower end of gate 3 is equipped with sharp head 8, two notches 7 are matched with sharp head 8.The sharp head 8 presses down two notches 7, facilitate gate 3 to push away two sealing valve seats 6.

[0020] Driving device includes second flange 9, second flange 9 is connected by bolt with first flange 5, the upper surface of second flange 9 is equipped with multiple vertical rods 10, the upper end of multiple vertical rods 10 is equipped with bearing block 11, the upper end of bearing block 11 is equipped with driving motor 12, the output shaft of driving motor 12 penetrates bearing block 11 and is equipped with rotary frame 13, rotary frame 13 is threadedly connected with screw rod 4.

[0021] Abutting device includes mounting block 14 arranged on the side surface of knife gate valve body 1, limit rod 15 is slidingly connected on the surface of mounting block 14, the end of limit rod 15 away from knife gate valve body 1 is equipped with end block 16, spring 17 is arranged between end block 16 and mounting block 14.

[0022] The upper inner wall of passageway 2 is equipped with two T-shaped grooves 18 that are left-right symmetrical, two T-shaped blocks 19 are slidingly connected in the inside of two T-shaped grooves 18, and the upper end of the two T-shaped blocks 19 in the same T-shaped groove 18 is connected to the lower surface of the same sealing valve seat 6. The T-shaped block 19 can slide in the T-shaped groove 18 and will not fall out.

[0023] The lower surface of knife gate valve body 1 is equipped with fan 20, and the upper end of fan 20 is connected to air passage 21. The lower inner wall of each T-shaped groove 18 is equipped with air outlet 22, and the lower end of air outlet 22 is connected to air passage 21.

[0024] The lower inner wall of passageway 2 is equipped with V-shaped groove 23 matched with sharp head 8. By extending the sharp head 8 into the V-shaped groove 23, it plays a further sealing role.

[0025] Working principle: start the driving motor 12, through the output shaft rotation and then drive the rotating frame 13 rotation, through the rotating frame 13 and screw 4 thread connection, and the knife gate valve body 1 inner wall sliding connection flap 3, can make the flap 3 rise or fall, realize the opening or closing of the knife gate valve. When the flap 3 moves down, the two sealing valve seats 6 are opened by the two notches 7, and the two sealing valve seats 6 are compressed by the spring 17, so that the two sealing valve seats 6 are tightly pressed against the flap 3. The knife gate valve is opened and closed for a long time, which will cause the sealing valve seat 6 to wear. The compression force of the spring 17 can make up for the wear, so that the two sealing valve seats 6 and the flap 3 are tightly sealed, which will not affect the sealing of the knife gate valve. By starting the fan 20, through the air path 21 and the air outlet 22, the dust in the T-shaped groove 18 can be blown out.

[0026] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A knife gate valve for solid particulate material, comprising a knife gate valve body (1), characterized in that, The lower part of the knife gate valve body (1) is provided with a channel (2), the inner wall of the knife gate valve body (1) is slidably connected with a gate plate (3), the upper end of the gate plate (3) is provided with a lead screw (4), the upper end of the knife gate valve body (1) is provided with a first flange (5), the upper surface of the first flange (5) is provided with a driving device, the driving device is threadedly connected with the lead screw (4), the lower inner wall of the channel (2) is slidably connected with two sealing valve seats (6), the side surfaces of the two sealing valve seats (6) away from each other are both provided with abutting devices, the ends of the two sealing valve seats (6) close to each other are both provided with notches (7), the lower end of the gate plate (3) is provided with a sharp head (8), and the two notches (7) are matched with the sharp head (8).

2. A knife gate valve for solid particulate material according to claim 1, wherein, The driving device comprises a second flange (9), the second flange (9) is connected with the first flange (5) through bolts, the upper surface of the second flange (9) is provided with a plurality of vertical rods (10), the upper ends of the vertical rods (10) are provided with supporting blocks (11), the upper end of the supporting block (11) is provided with a driving motor (12), the output shaft of the driving motor (12) penetrates through the supporting block (11) and is provided with a rotating frame (13), and the rotating frame (13) is threadedly connected with the lead screw (4).

3. A knife gate valve for solid particulate material as defined in claim 1, wherein, The abutting device comprises a mounting block (14) arranged on the side surface of the knife gate valve body (1), the surface of the mounting block (14) is slidably connected with a limiting rod (15), the end of the limiting rod (15) away from the knife gate valve body (1) is provided with an end block (16), and the spring (17) is arranged between the end block (16) and the mounting block (14).

4. A knife gate valve for solid particulate material as defined in claim 1, wherein, The upper inner wall of the channel (2) is provided with two T-shaped grooves (18) symmetrical to each other, two T-shaped blocks (19) are slidably connected in the two T-shaped grooves (18), respectively, and the upper ends of the two T-shaped blocks (19) in the same T-shaped groove (18) are connected with the lower surface of the same sealing valve seat (6).

5. A knife gate valve for solid particulate material according to claim 4, wherein, The lower surface of the knife gate valve body (1) is provided with a fan (20), the upper end of the fan (20) is communicated with an air path (21), the lower inner walls of the two T-shaped grooves (18) are both provided with air outlets (22), and the lower ends of the air outlets (22) are communicated with the air path (21).

6. A knife gate valve for solid particulate material as defined in claim 1, wherein, The lower inner wall of the channel (2) is provided with a V-shaped groove (23) matched with the sharp head (8).

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