Anti-blocking knife gate valve

Abstract

The utility model discloses an anti-blocking knife gate valve which comprises a valve body, a valve plate and a driving assembly. The arc-shaped groove is formed in the bottom of the valve body; the wear-resistant soft cushion is arranged at a notch of the arc-shaped groove; the elastic supporting seats are uniformly distributed at the bottom of the arc-shaped groove, and the tops are connected with the wear-resistant soft cushion; the two sets of extrusion plates are rotationally installed on the two sides of the top of the elastic supporting base correspondingly. The utility model relates to the technical field of valves, when the gate is closed, the wear-resistant cushion and the elastic supporting seat are driven to descend along with the descending of the valve plate, so that the extrusion plate on the elastic supporting seat abuts against the arc-shaped abutting rods, and the arc-shaped abutting rods abut against the wear-resistant cushion and the elastic supporting seat. When the knife gate valve is opened, the wear-resistant cushion is driven to ascend under the action of reverse elastic force of the elastic supporting seat, so that the problem of accumulation of impurities in a medium channel is effectively avoided, and the sealing effect of the knife gate valve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and specifically relates to an anti-blocking knife gate valve. Background Art

[0002] Manual knife gate valve is also called manual plug-in valve. The opening and closing part of manual knife gate valve is the gate. The movement direction of the gate is perpendicular to the direction of the fluid. The knife gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The ultra-thin knife gate valve has the advantages of small size, small flow resistance, light weight, easy installation and easy disassembly. It completely solves the difficult problems of large flow resistance, large weight, difficult installation and large floor space of ordinary gate valves, flat gate valves, ball valves, stop valves, regulating valves, butterfly valves and other valves. The manual knife gate valve has the advantages of simple and compact structure, reasonable design, light material saving, reliable sealing, light and flexible operation, small size, smooth channel, small flow resistance, light weight, easy installation and easy disassembly.

[0003] Manual gate valves are generally opened and closed by a handwheel. To ensure the sealing of the gate valve, a channel is generally provided underneath the gate seat. When the gate is closed, the valve stem drives the valve plate to the rubber ring at the lower end of the gate plate, so that the rubber ring and the channel have an interference fit to achieve a sealing effect. However, due to the existence of the channel, impurities in the medium channel are easily accumulated in the channel, making it difficult for the gate plate to just enter the interior of the channel when the gate is closed, resulting in a poor sealing effect. For this reason, an anti-blocking knife gate valve is provided. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-blocking knife gate valve to solve the problem that due to the existence of the channel, impurities in the medium channel are easily accumulated in the channel, making it difficult for the gate to just enter the interior of the channel when closing the gate, resulting in poor sealing effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-blocking knife gate valve, comprising:

[0006] Valve body;

[0007] A valve plate is disposed in the valve body;

[0008] A drive assembly, provided on the valve body, for driving the valve plate to vertically reciprocate in the medium channel of the valve body;

[0009] An arc-shaped groove is provided at the bottom of the medium channel of the valve body;

[0010] A wear-resistant soft pad is provided at the notch of the arc-shaped groove;

[0011] A plurality of elastic support seats are provided and evenly distributed at the bottom of the arc-shaped groove, and the top of the elastic support seat is connected to the wear-resistant soft pad;

[0012] The extrusion plates are arranged in two groups, each group is provided with a plurality of extrusion plates, and the two groups of extrusion plates are rotatably mounted on both sides of the top of the elastic support seat respectively;

[0013] There are two arc-shaped resistance rods, which are respectively located on both sides of the elastic support seat and are used to contact the extrusion plate.

[0014] Preferably, the elastic support seat includes a support plate arranged in the arc-shaped groove, a plurality of guide rods passing through the arc-shaped groove are provided at the bottom of the support plate, a spring is provided on the outside of the guide rod and located between the bottom of the arc-shaped groove and the support plate, a connecting seat connected to a wear-resistant soft pad is provided on the top of the support plate, and the extrusion plate is rotatably installed on both sides of the connecting seat.

[0015] Preferably, the top of the connecting seat is set as an inner arc surface, and the inner arc surface of the top of the connecting seat is connected to the wear-resistant soft pad to form an arc surface that is compatible with the bottom of the valve plate.

[0016] Preferably, an elastic sheet that contacts the wear-resistant soft pad is provided at the upper end of the inner wall of the arc-shaped groove, and the contact end of the elastic sheet is set to a smooth surface.

[0017] Preferably, the end of the extrusion plate is configured as a smooth arc surface.

[0018] Preferably, the drive assembly includes a valve stem connected to the top of the valve plate, and the top of the valve stem extends out of the valve body and is provided with a hand-held portion.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an anti-blocking knife gate valve. When the gate is closed, the driving assembly drives the valve plate to descend and contact the wear-resistant soft pad, and as the valve plate descends, the wear-resistant soft pad and the elastic support seat are driven to descend, so that the extrusion plate on the elastic support seat conflicts with the arc-shaped interference rod, so that the extrusion plates on both sides rotate relative to each other to squeeze the wear-resistant soft pad toward the bottom of the valve plate for sealing. When the gate is opened, the wear-resistant soft pad is driven to rise to form an arc-shaped protrusion under the action of the reverse elastic force of the elastic support seat, which effectively avoids the problem of impurity accumulation in the medium channel. When the gate is closed, the valve plate contacts the wear-resistant soft pad and the extrusion plates on both sides are used to seal the valve plate and the wear-resistant soft pad, thereby ensuring the sealing effect of the knife gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0021] Figure 2 It is a left sectional structural schematic diagram of the utility model;

[0022] Figure 3 for Figure 1 A local enlarged structural diagram of point A;

[0023] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point B.

[0024] In the figure: 1. Valve body; 2. Valve plate; 3. Drive assembly; 3-1. Valve stem; 3-2. Handle; 4. Arc-shaped groove; 5. Wear-resistant cushion; 6. Elastic support seat; 6-1. Support plate; 6-2. Guide rod; 6-3. Spring; 6-4. Connecting seat; 7. Extrusion plate; 8. Arc-shaped resistance rod; 9. Shrapnel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4 The utility model provides a technical solution: an anti-blocking knife gate valve, comprising a valve body 1; a valve plate 2 is arranged in the valve body 1; a driving assembly 3 is arranged on the valve body 1, and is used to drive the valve plate 2 to vertically reciprocate in the medium channel of the valve body 1; an arc-shaped groove 4 is arranged at the bottom of the medium channel of the valve body 1; a wear-resistant soft pad 5 is arranged at the notch of the arc-shaped groove 4; a plurality of elastic support seats 6 are provided, which are evenly distributed at the bottom of the arc-shaped groove 4, and the top of the elastic support seat 6 is connected to the wear-resistant soft pad 5; an extrusion plate 7 is provided in two groups, each group is provided with a plurality of extrusion plates, and the two groups of extrusion plates 7 are rotatably installed on both sides of the top of the elastic support seat 6; there are two arc-shaped contact rods 8, which are respectively located on both sides of the elastic support seat 6. It is used to contact with the extrusion plate 7. When the gate is closed, the driving assembly 3 drives the valve plate 2 to descend and contact with the wear-resistant soft pad 5, and as the valve plate 2 descends, the wear-resistant soft pad 5 and the elastic support seat 6 are driven to descend, so that the extrusion plate 7 on the elastic support seat 6 conflicts with the arc-shaped conflicting rod 8, so that the extrusion plates 7 on both sides rotate relative to each other to squeeze the wear-resistant soft pad 5 toward the bottom of the valve plate 2 for sealing. When the gate is opened, the wear-resistant soft pad 5 is driven to rise to form an arc-shaped bulge under the action of the reverse elastic force of the elastic support seat 6, which effectively avoids the problem of impurity accumulation in the medium channel. When the gate is closed, the valve plate 2 contacts with the wear-resistant soft pad 5 and the extrusion plates 7 on both sides are used to seal the valve plate 2 and the wear-resistant soft pad 5, thereby ensuring the sealing effect of the knife gate valve.

[0027] Specifically, the elastic support seat 6 includes a support plate 6-1 arranged in the arc-shaped groove 4, and a plurality of guide rods 6-2 passing through the arc-shaped groove 4 are provided at the bottom of the support plate 6-1. A spring 6-3 is provided on the outside of the guide rod 6-2 and between the bottom of the arc-shaped groove 4 and the support plate 6-1. A connecting seat 6-4 connected to the wear-resistant soft pad 5 is provided on the top of the support plate 6-1, and the extrusion plate 7 is rotatably installed on both sides of the connecting seat 6-4. When the gate is closed, the valve plate 2 drives the wear-resistant soft pad 5 to descend, so that the wear-resistant soft pad 5 drives the connecting seat 6-4, the support plate 6-1 and the guide rod 6-2 to descend, and at the same time compresses the spring 6-3. When the gate is opened, the elastic force of the spring 6-3 drives the connecting seat 6-4, the support plate 6-1 and the guide rod 6-2 to rise, and the connecting seat 6-4 drives the wear-resistant soft pad 5 to rise to form an arc-shaped protrusion, thereby realizing elastic support for the wear-resistant soft pad 5.

[0028] Specifically, the top of the connecting seat 6-4 is set as an inner arc surface, and the inner arc surface of the top of the connecting seat 6-4 is connected to the wear-resistant soft pad 5 to form an arc surface that matches the bottom of the valve plate 2. By forming an arc surface on the wear-resistant soft pad 5 that matches the bottom of the valve plate 2, the sealing effect of the valve plate 2 is improved.

[0029] Specifically, the upper end of the inner wall of the arc-shaped groove 4 is provided with a spring piece 9 that contacts the wear-resistant soft pad 5. The contact end of the spring piece 9 is set to a smooth surface. The smooth surface of the spring piece 9 effectively avoids damage to the wear-resistant soft pad 5. When the gate is opened, the spring piece 9 is set to support both sides of the wear-resistant soft pad 5 and form an arc-shaped surface for the wear-resistant soft pad, which effectively avoids the accumulation of impurities.

[0030] Specifically, the end of the extrusion plate 7 is set to a smooth arc surface. During the rotation of the extrusion plate 7, the end of the extrusion plate 7 will contact the wear-resistant soft pad 5. By setting the end of the extrusion plate 7 to a smooth arc surface, damage to the wear-resistant soft pad 5 is effectively avoided, thereby ensuring the service life of the wear-resistant soft pad 5.

[0031] Specifically, the drive assembly 3 includes a valve stem 3-1 connected to the top of the valve plate 2. The top of the valve stem 3-1 extends out of the valve body 1 and is provided with a handle 3-2. When in use, the handle 3-2 is rotated to drive the valve stem 3-1 and the valve plate 2 to move up and down, thereby opening or closing the valve 2.

[0032] Working principle: When the utility model is in use and the gate is closed, the driving component 3 drives the valve plate 2 to descend and contact the wear-resistant soft pad 5, and as the valve plate 2 descends, the wear-resistant soft pad 5 and the elastic support seat 6 are driven to descend, so that the extrusion plate 7 on the elastic support seat 6 conflicts with the arc-shaped conflicting rod 8, so that the extrusion plates 7 on both sides rotate relative to each other to squeeze the wear-resistant soft pad 5 toward the bottom of the valve plate 2 to achieve sealing.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0035] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-blocking knife gate valve, characterized in that: include: Valve body (1); A valve plate (2) is arranged in the valve body (1); A drive assembly (3) is provided on the valve body (1) and is used to drive the valve plate (2) to move vertically back and forth in the medium channel of the valve body (1); An arc-shaped groove (4) is provided at the bottom of the medium channel of the valve body (1); A wear-resistant soft pad (5) is arranged at the notch of the arc-shaped groove (4); A plurality of elastic support seats (6) are provided and evenly distributed at the bottom of the arc-shaped groove (4), and the top of the elastic support seat (6) is connected to the wear-resistant soft pad (5); The extrusion plates (7) are arranged in two groups, each group being provided with a plurality of extrusion plates, and the two groups of extrusion plates (7) are rotatably mounted on both sides of the top of the elastic support seat (6); Two arc-shaped contact rods (8) are provided, located on both sides of the elastic support seat (6) and used for contacting the extrusion plate (7).

2. The anti-blocking knife gate valve according to claim 1, characterized in that: The elastic support seat (6) comprises a support plate (6-1) arranged in the arc-shaped groove (4); a plurality of guide rods (6-2) penetrating the arc-shaped groove (4) are provided at the bottom of the support plate (6-1); a spring (6-3) is provided on the outside of the guide rods (6-2) and between the groove bottom of the arc-shaped groove (4) and the support plate (6-1); a connecting seat (6-4) connected to the wear-resistant soft pad (5) is provided at the top of the support plate (6-1); and the extrusion plate (7) is rotatably mounted on both sides of the connecting seat (6-4).

3. The anti-blocking knife gate valve according to claim 2, characterized in that: The top of the connecting seat (6-4) is configured as an inner arc surface, and the inner arc surface of the top of the connecting seat (6-4) is connected to the wear-resistant soft pad (5) to form an arc surface that matches the bottom of the valve plate (2).

4. The anti-blocking knife gate valve according to claim 1, characterized in that: The upper end of the inner wall of the arc-shaped groove (4) is provided with a spring piece (9) that contacts the wear-resistant soft pad (5), and the contact end of the spring piece (9) is set as a smooth surface.

5. The anti-blocking knife gate valve according to claim 1, characterized in that: The end of the extrusion plate (7) is configured as a smooth arc surface.

6. The anti-blocking knife gate valve according to claim 1, characterized in that: The drive assembly (3) comprises a valve stem (3-1) connected to the top of the valve plate (2); the top of the valve stem (3-1) extends out of the valve body (1) and is provided with a hand-held portion (3-2).

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