Knife gate valve

Abstract

The utility model discloses a knife gate valve which comprises a valve body, a gate plate and an air cylinder for driving the gate plate to translate in the valve body. The valve body comprises a supporting plate and a cover plate, the supporting plate is detachably connected with the cover plate, the supporting plate and the cover plate are both provided with material channels which correspond to each other, and the two ends of the two material channels protrude out of the inner side face and the outer side face of the supporting plate and the cover plate body respectively; the flashboard is located in a cavity formed by the supporting plate and the cover plate, through holes corresponding to the material channels are formed in the flashboard, self-lubricating sealing plates and elastic plates are sequentially arranged on the two sides of the two adjacent material channels of the flashboard, and the peripheries of ports, located at the ends in the cavity, of the adjacent material channels are sleeved with the self-lubricating sealing plates and the elastic plates. The self-lubricating sealing plate is tightly attached to the adjacent face of the gate plate under the elastic action of the elastic plate. The piston end of the supporting plate of the air cylinder extends into the cavity and is connected with the flashboard through a quick-release assembly. The utility model can be self-cleaned, and can avoid the problem that the materials are easy to deteriorate after being stacked for a long time.

Description

Technical Field

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

[0002] In chemical solid material production equipment and conveying systems, knife gate valves play the role of opening or closing the flow of materials. Compared with other switch valves such as ball valves, butterfly valves, fluid gate valves, etc., their thin structure occupies less space, is lighter and more economical.

[0003] In the existing knife gate valve, there is a dead corner in the space between the gate and the shell. Once the transported material medium enters the dead corner, it is impossible to clear the material through the action of the gate itself. During use, the material is easy to accumulate. Although it does not affect the action of the gate in most cases, the long-term accumulation of materials is prone to deterioration. Therefore, this knife gate valve is not applicable in the fields of food, medicine and fine chemicals. Utility Model Content

[0004] The purpose of the utility model is to provide a knife gate valve to solve the above technical problems.

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

[0006] A knife gate valve comprises a valve body, a gate plate and a cylinder for driving the gate plate to translate inside the valve body;

[0007] The valve body comprises a support plate and a cover plate, the support plate and the cover plate are detachably connected, the support plate and the cover plate are both provided with corresponding material channels, the two ends of the two groups of material channels protrude from the inner and outer side surfaces of the support plate and the cover plate body respectively, in addition, the support plate is provided with a positioning pin, and the cover plate is provided with a pin hole matched with the positioning pin;

[0008] The gate plate is located inside the cavity formed by the support plate and the cover plate, and a through hole corresponding to the material channel is provided on the gate plate, and self-lubricating sealing plates and elastic plates are sequentially provided on both sides of two adjacent groups of material channels of the gate plate, and the self-lubricating sealing plates and elastic plate bodies are sleeved on the outer periphery of the port of the adjacent material channel located at one end inside the cavity, and the self-lubricating sealing plates are tightly fitted with the adjacent surface of the gate plate under the elastic force of the elastic plate;

[0009] The cylinder body of the cylinder is arranged on the supporting plate, and the piston end of the cylinder extends into the cavity and is connected with the gate plate through a quick-detachable component.

[0010] Furthermore, there are multiple groups of detachable components used for the detachable connection between the support plate and the cover plate, which include a hinge seat, a live bolt, a star-shaped handle, a pressure block, and a U-shaped groove. The hinge seat is welded to the outer edge of the support plate, the live end of the live bolt is hinged on the hinge seat, the star-shaped handle is threadedly connected to the threaded end of the live bolt, and the pressure block is provided on the star-shaped handle body, and the U-shaped groove is provided on the outer edge of the cover plate and corresponds to the live bolt.

[0011] Furthermore, the quick-detachable assembly includes a T-block arranged at the piston end of the cylinder and a clamping block arranged on the gate plate, and the clamping block is provided with a T-shaped clamping groove that cooperates with the T-block.

[0012] Furthermore, sanitary clamps for quick connection of pipelines are provided on the peripheries of the ports of the two groups of material channels located at one end outside the cavity.

[0013] The beneficial effects of the utility model are:

[0014] Driven by the cylinder, the gate moves inside the cavity formed by the support plate and the cover plate. When the through hole on the gate is connected with the two sets of material channels, the material can smoothly enter from one set of material channels to the other set of material channels to achieve material transmission. This is the open state of the gate. When the through hole on the gate is not connected with the two sets of material channels, the gate cuts off the material transmission. This is the closed state of the gate. When the gate is in the closed state driven by the cylinder, the through hole on the gate will carry a part of the material temporarily stored in the closed space formed by it and the self-lubricating sealing plate. The self-lubricating sealing plate fits closely with the adjacent surface of the gate under the elastic force of the elastic plate. There is no dead angle in the space, and the remaining material cannot enter between the contact surfaces of the two. When the gate is opened, the material temporarily stored in the closed space will return to the flow channel formed by the through hole and the two sets of material channels. This action forms self-cleaning, thereby avoiding the problem of material accumulation and easy deterioration for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a structural split diagram of the utility model.

[0017] Figure 2 It is a structural diagram of the utility model.

[0018] In the figure: 1, valve body, 101, support plate, 102, cover plate, 103, material channel, 104, positioning pin, 105, pin hole, 2, gate, 201, through hole, 3, cylinder, 4, self-lubricating sealing plate, 5, elastic plate, 600, hinge seat, 601, live bolt, 602, star handle, 603, pressure block, 604, U-shaped groove, 700, T-block, 701, clamping block, 8, sanitary clamp. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0020] like Figure 1-2 As shown, the utility model provides a knife gate valve, comprising a valve body 1, a gate plate 2 and a cylinder 3 for driving the gate plate 2 to translate inside the valve body 1;

[0021] The valve body 1 includes a support plate 101 and a cover plate 102. The support plate 101 and the cover plate 102 are detachably connected. The support plate 101 and the cover plate 102 are both provided with corresponding material channels 103. The two ends of the two groups of material channels 103 protrude from the inner and outer sides of the support plate 101 and the cover plate 102 respectively. In addition, the support plate 101 is provided with a positioning pin 104, and the cover plate 102 is provided with a pin hole 105 that matches the positioning pin 104.

[0022] The gate plate 2 is located inside the cavity formed by the support plate 101 and the cover plate 102. The gate plate 2 is provided with through holes 201 corresponding to the material channels 103, and the apertures are equal. Self-lubricating sealing plates 4 and elastic plates 5 are sequentially arranged on both sides of the two adjacent groups of material channels 103 of the gate plate 2. The self-lubricating sealing plates 4 and the elastic plates 5 are sleeved on the outer periphery of the ports of the adjacent material channels 103 at one end inside the cavity. The self-lubricating sealing plates 4 fit tightly with the adjacent surfaces of the gate plate 2 under the elastic force of the elastic plate 5. Therefore, there is no dead angle between the two spaces, and materials cannot enter. The self-lubricating sealing plates 4 are made of polytetrafluoroethylene, which has the characteristics of excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stickiness, electrical insulation and good anti-aging resistance. Therefore, when the self-lubricating sealing plate 4 and the adjacent surface of the gate plate 2 are closely fitted, the friction resistance is also small. When the self-lubricating sealing plate 4 and the elastic plate 5 are in contact with each other, they are squeezed by the clamping force when the support plate 101 and the cover plate 102 are combined and connected together. The material used for the elastic plate 5 is rubber, which will produce a certain elastic force when squeezed. Therefore, the elastic plate 5 made of rubber can apply elastic force to the self-lubricating sealing plate 4, thereby promoting the self-lubricating sealing plate 4 and the adjacent surface of the gate plate 2 to fit closely.

[0023] The cylinder body of the cylinder 3 is arranged on the support plate 101, and the piston end thereof extends into the cavity and is connected to the gate plate 2 through a quick-detachable component.

[0024] Driven by the cylinder 3, the gate plate 2 moves inside the cavity formed by the support plate 101 and the cover plate 102. When the through hole 201 on the gate plate 2 is connected with the two groups of material channels 103, the material can smoothly enter from one group of material channels 103 to the other group of material channels 103 to realize the transmission of the material. This is the open state of the gate plate 2. When the through hole 201 on the gate plate 2 is not connected with the two groups of material channels 103, the gate plate 2 serves to cut off the transmission of the material. This is the closed state of the gate plate 2. When the gate 2 is in a closed state driven by the cylinder 3, the through hole 201 on the gate 2 will carry a part of the material temporarily stored in the closed space formed by it and the self-lubricating sealing plate 4. The self-lubricating sealing plate 4 is tightly fitted with the adjacent surface of the gate 2 under the elastic force of the elastic plate 5, and there is no dead angle in the space. The remaining material cannot enter between the contact surfaces of the two. When the gate 2 is opened, the material temporarily stored in the closed space will return to the flow channel formed by the through hole 201 and the two groups of material channels 103. This action forms self-cleaning, thereby avoiding the problem of material accumulation and easy deterioration over a long period of time.

[0025] When the knife gate valve disclosed in the utility model has a higher requirement for cleanliness during operation, the detachable connection between the support plate 101 and the cover plate 102 and the connection between the piston end of the cylinder 3 and the gate plate 2 through a quick-detachable component are both conducive to quickly disassembling the knife gate valve disclosed in the utility model and performing deep cleaning.

[0026] In this embodiment, there are multiple groups of detachable components used for detachable connection between the support plate 101 and the cover plate 102, which include a hinge seat 600, a movable bolt 601, a star-shaped handle 602, a pressure block 603, and a U-shaped groove 604. The hinge seat 600 is welded to the outer edge of the support plate 101, the movable end of the movable bolt 601 is hinged on the hinge seat 600, the star-shaped handle 602 is threadedly connected to the threaded end of the movable bolt 601, and a pressure block 603 is provided on the main body of the star handle 602, and the U-shaped groove 604 is provided on the outer edge of the cover plate 102 and corresponds to the movable bolt 601. When the support plate 101 and the cover plate 102 are connected together, the star-shaped handle 602 is held to rotate and swing the movable bolt 601 and clamp it into the U-shaped groove 604, and then the star-shaped handle 602 is rotated to cause the pressing block 603 to move and press on the outer edge of the cover plate 102, so as to realize the rapid locking of the support plate 101 and the cover plate 102 after they are combined, and at the same time, the sandwich structure composed of the gate plate 2 and the self-lubricating sealing plate 4 and the elastic plate 5 on both sides can be clamped. When the cover plate 102 is to be disassembled from the support plate 101, the star handle 602 is rotated in the opposite direction, and the pressure block 603 is moved away from the cover plate 102 and no longer pressurizes the cover plate 102. Then, the movable bolt 601 is rotated to swing out from the U-shaped groove 604. At this time, the connection between the support plate 101 and the cover plate 102 can be quickly disassembled. The quick-detachable assembly includes a T-block 700 provided at the piston end of the cylinder 3 and a clamping block 701 provided on the gate plate 2. The clamping block 701 is provided with a T-shaped clamping groove matched with the T-block 700.

[0027] In addition, sanitary clamps 8 for quick connection of pipes are provided on the periphery of the ports of the two sets of material channels 103 located at one end outside the cavity. The design of the sanitary clamps 8 facilitates the quick connection and separation of the two sets of material channels 103 with the upper and lower material pipes, respectively, and also facilitates the deep cleaning of the knife gate valve disclosed in the utility model.

[0028] The above-described implementation modes of the present invention do not constitute a limitation on the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A knife gate valve, comprising a valve body (1), a gate plate (2) and a cylinder (3) for driving the gate plate (2) to translate inside the valve body (1), characterized in that: The valve body (1) comprises a support plate (101) and a cover plate (102); the support plate (101) and the cover plate (102) are detachably connected; the support plate (101) and the cover plate (102) are both provided with corresponding material channels (103); the two ends of the two groups of material channels (103) respectively protrude from the inner and outer side surfaces of the support plate (101) and the cover plate (102); The gate plate (2) is located inside a cavity formed by the support plate (101) and the cover plate (102); a through hole (201) corresponding to the material channel (103) is provided on the gate plate (2); and self-lubricating sealing plates (4) and elastic plates (5) are sequentially provided on both sides of two adjacent groups of material channels (103) of the gate plate (2); the main bodies of the self-lubricating sealing plates (4) and the elastic plates (5) are sleeved on the outer periphery of the ports of the adjacent material channels (103) located at one end inside the cavity; and the self-lubricating sealing plates (4) are tightly fitted with the adjacent surface of the gate plate (2) under the elastic force of the elastic plate (5); The cylinder (3) is arranged on the support plate (101), and its piston end extends into the cavity and is connected to the gate plate (2) via a quick-detachable component.

2. The knife gate valve according to claim 1, characterized in that The detachable components used for the detachable connection between the support plate (101) and the cover plate (102) include multiple groups, which include a hinge seat (600), a movable bolt (601), a star-shaped handle (602), a pressure block (603), and a U-shaped groove (604). The hinge seat (600) is welded to the outer edge of the support plate (101), the movable end of the movable bolt (601) is hinged on the hinge seat (600), the star-shaped handle (602) is threadedly connected to the threaded end of the movable bolt (601), and the pressure block (603) is provided on the main body of the star-shaped handle (602), and the U-shaped groove (604) is provided on the outer edge of the cover plate (102) and corresponds to the movable bolt (601).

3. The knife gate valve according to claim 1, characterized in that The quick-detachable assembly comprises a T-shaped block (700) arranged at the piston end of the cylinder (3) and a clamping block (701) arranged on the gate plate (2), wherein the clamping block (701) is provided with a T-shaped clamping groove that cooperates with the T-shaped block (700).

4. The knife gate valve according to claim 1, characterized in that The outer periphery of the ports of the two groups of material channels (103) located at one end outside the cavity are both provided with sanitary clamps (8) for quick connection of pipelines.

5. The knife gate valve according to claim 1, characterized in that The support plate (101) is provided with a positioning pin (104), and the cover plate (102) is provided with a pin hole (105) that cooperates with the positioning pin (104).

Images