Penetration type knife gate valve

Abstract

The utility model relates to the field of knife gate valves, in particular to a penetration type knife gate valve. The valve comprises a valve body, an air cylinder, a valve plate, a resistance reducing piece and a sealing piece. A butt joint opening is formed in the valve body, and an inner groove communicated with the butt joint opening is further formed in the valve body. The cylinder is arranged at the upper end of the valve body. The valve plate is connected with the telescopic end of the cylinder; the valve plate is arranged in the inner groove in a sliding mode and can open / close the butt joint opening. The resistance reducing piece is arranged in the valve body and rotates through the multiple rolling shafts so as to reduce resistance generated when the valve plate closes the butt joint opening. The sealing piece communicates with the resistance reducing piece, and the air bag is inflated and abuts against the peripheral side of the valve plate so that the sealing performance between the valve plate and the butt joint opening can be enhanced. The air cylinder is started to drive the valve plate to descend. When the valve plate descends, the rolling shaft can roll along with descending of the valve plate. The resistance when the valve plate slides down can be reduced, the valve plate can be pushed to slide down, and the butt joint opening can be rapidly closed. Meanwhile, friction between the valve body and the valve plate can be reduced, and therefore abrasion between the valve body and the valve plate is reduced.

Description

Technical Field

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

[0002] The working principle of the through-type knife gate valve is to open and close the fluid by directly cutting the flow path with a blade. The blade does not rotate when moving back and forth, thus avoiding the wear problem of the rotating valve core. At the same time, due to the use of a double eccentric structure and a wedge structure, the valve can generate a certain axial thrust during the opening and closing process to automatically compensate for the leakage.

[0003] A Chinese patent document with authorization announcement number CN220792109U proposes a penetrating knife gate valve, including a valve body and an adjusting mechanism, wherein the outer wall of the valve body is coated with an anti-corrosion coating, and connecting flanges are welded on both sides of the bottom end of the valve body, the top end of the valve body is screwed to a valve seat, and the inner wall of the valve seat is screwed to a fixing rod, a mounting tube is welded to the top end of the valve seat, and the adjusting mechanism is screwed to the inner wall of the mounting tube.

[0004] In the above application, although the anti-corrosion coating can provide an anti-corrosion effect on the outside of the valve body, during the closing process of the valve plate of the knife gate valve, the medium is constantly flowing, which may cause greater resistance to the closing of the valve plate, making it difficult to close the valve plate. Utility Model Content

[0005] In view of the problems existing in the background technology, a penetrating knife gate valve is proposed.

[0006] The utility model proposes a penetrating knife gate valve, comprising a valve body, a cylinder, a valve plate, a resistance reducing member and a sealing member. A docking port is provided on the valve body, and an inner groove connected to the docking port is also provided in the valve body. The cylinder is arranged at the upper end of the valve body. The valve plate is connected to the telescopic end of the cylinder; the valve plate is slidably arranged in the inner groove, and the docking port can be opened / closed. The resistance reducing member is arranged in the valve body, and is rotated by a plurality of rollers to reduce the resistance when the valve plate closes the docking port. The sealing member is connected to the resistance reducing member, and the air bag is inflated and pressed against the peripheral side of the valve plate to enhance the sealing between the valve plate and the docking port.

[0007] Preferably, the resistance reducing components are symmetrically arranged on the left and right sides of the docking interface, and are also symmetrically arranged on the front and back sides of the docking interface.

[0008] Preferably, multiple groups of resistance reducing members are provided in the vertical direction.

[0009] Preferably, the inner wall of the inner groove is connected with a connecting groove 1; the bottom of the connecting groove 1 is connected with a spring; the other end of the spring is connected with a connecting frame; and a roller is rotatably connected to the connecting frame.

[0010] Preferably, the seals are symmetrically arranged on the front and back sides of the butting interface; the seal includes connecting pipes that are in one-to-one correspondence and communication with a plurality of communicating grooves; the other ends of the plurality of connecting pipes are jointly communicated with an airbag arranged in the communicating groove two; the communicating groove two is communicated with the inner groove.

[0011] Preferably, the connecting frame has the same size as the notch of the communicating groove one, and can seal the notch of the communicating groove one.

[0012] Preferably, the airbag is in the shape of □ and can block the upper, lower, left and right sides of the butting interface.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] (1) For this penetrating knife gate valve, starting the cylinder drives the valve plate to descend. When the valve plate descends, the roller will roll along with the descent of the valve plate. The resistance during the descent of the valve plate can be reduced, which helps to push the valve plate downwards to quickly close the butting interface. At the same time, the friction between the valve body and the valve plate can be reduced, thereby reducing the wear between the valve body and the valve plate.

[0015] (2) For this penetrating knife gate valve, the valve plate will push the roller and the connecting frame into the communicating groove one, so that the gas inside the communicating groove one is squeezed into the airbag along the connecting pipe, and thus the airbag is inflated and abuts against the periphery of the valve plate to seal the connection between the butting interface and the valve plate to prevent the medium from leaking. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 is a schematic diagram of the resistance reducing member and the seal structure of the utility model.

[0019] Reference numerals: 1, valve body; 101, butting interface; 102, inner groove; 2, cylinder; 3, valve plate; 4, resistance reducing member; 41, communicating groove one; 42, spring; 43, connecting frame; 44, roller; 5, seal; 51, connecting pipe; 52, communicating groove two; 53, airbag. Detailed Embodiments

[0020] Embodiment 1

[0021] As Figures 1-3As shown in the figure, a penetrating knife gate valve proposed by the present utility model includes a valve body 1, a cylinder 2, a valve plate 3, a resistance reducing member 4 and a sealing member 5. An interface 101 is provided on the valve body 1, and an inner groove 102 communicating with the interface 101 is also provided inside the valve body 1. The cylinder 2 is arranged at the upper end of the valve body 1. The valve plate 3 is connected to the telescopic end of the cylinder 2; the valve plate 3 is slidably arranged in the inner groove 102 and can open / close the interface 101. The resistance reducing member 4 is arranged inside the valve body 1 and rotates through a plurality of rollers 44 to reduce the resistance when the valve plate 3 closes the interface 101. The sealing member 5 communicates with the resistance reducing member 4, and by inflating the airbag 53 and pressing it against the periphery of the valve plate 3, the sealing performance between the valve plate 3 and the interface 101 is enhanced.

[0022] Further explanation, the resistance reducing members 4 are symmetrically arranged on the left and right sides of the interface 101, and are also symmetrically arranged on the front and back sides of the interface 101. Multiple groups of resistance reducing members 4 are provided in the vertical direction. By arranging the rollers 44 in multiple directions and increasing the number of rollers 44 at the same time, the resistance of the valve plate 3 sliding down can be further reduced.

[0023] Further explanation, a first connecting groove 41 is communicated with the inner wall of the inner groove 102; a spring 42 is connected to the bottom of the first connecting groove 41; the other end of the spring 42 is connected to a connecting frame 43; a roller 44 is rotatably connected to the connecting frame 43. When the valve plate 3 slides down, the roller 44 can roll along with the sliding of the valve plate 3, which can reduce the resistance when the valve plate 3 slides down, help push the valve plate 3 to slide down, so as to quickly close the interface 101. At the same time, the friction between the valve body 1 and the valve plate 3 can be reduced, thereby reducing the wear between the valve body 1 and the valve plate 3.

[0024] Embodiment 2

[0025] As Figures 2-3 shown in the figure, a penetrating knife gate valve proposed by the present utility model, compared with Embodiment 1, this embodiment further includes: the sealing members 5 are symmetrically arranged on the front and back sides of the interface 101; the sealing members 5 include connecting pipes 51 corresponding to and communicating with a plurality of first connecting grooves 41 one by one; the other ends of the plurality of connecting pipes 51 are commonly communicated with an airbag 53 arranged in a second connecting groove 52; the second connecting groove 52 communicates with the inner groove 102. The connecting frame 43 has the same size as the opening of the first connecting groove 41 and can seal the opening of the first connecting groove 41. When the valve plate 3 slides down, the valve plate 3 squeezes the roller 44 into the first connecting groove 41, and the gas inside the first connecting groove 41 can be squeezed into the airbag 53, so that the airbag 53 is inflated and pressed against the valve plate 3, sealing the connection between the interface 101 and the valve plate 3 to prevent medium leakage.

[0026] Further explanation, the airbag 53 is in the shape of □ and can block the upper, lower, left and right four sides of the interface 101, which can improve the sealing performance.

[0027] The working principle of the present utility model is as follows: When it is necessary to close the mating interface 101, the cylinder 2 is activated to drive the valve plate 3 to descend. When the valve plate 3 descends, the roller 44 will roll along with the descent of the valve plate 3, thereby helping to push the valve plate 3 downward to quickly close the mating interface 101. At the same time, the valve plate 3 will push the roller 44 and the connecting frame 43 into the first communication groove 41, so that the gas inside the first communication groove 41 is squeezed into the airbag 53 along the connecting pipe 51, thereby inflating the airbag 53 to abut against the periphery of the valve plate 3 and sealing the connection between the mating interface 101 and the valve plate 3.

[0028] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those skilled in the art to which it pertains.

Claims

1. A penetrating knife gate valve, characterized in that: include A valve body (1); a docking port (101) is provided on the valve body (1), and an inner groove (102) communicating with the docking port (101) is also provided in the valve body (1); A cylinder (2) disposed at the upper end of the valve body (1); A valve plate (3) connected to the telescopic end of the cylinder (2); the valve plate (3) is slidably disposed in the inner groove (102) and can open / close the docking port (101); A resistance reducing member (4) is arranged in the valve body (1) and rotated by a plurality of rollers (44) to reduce the resistance of the valve plate (3) when closing the docking port (101); and a sealing member (5) which is in communication with the resistance reducing member (4) and enhances the sealing performance between the valve plate (3) and the docking port (101) by inflating the airbag (53) and pressing against the peripheral side of the valve plate (3).

2. A penetrating knife gate valve according to claim 1, characterized in that: The resistance reducing member (4) is symmetrically arranged on the left and right sides of the docking port (101), and is also symmetrically arranged on the front and rear sides of the docking port (101).

3. A penetrating knife gate valve according to claim 2, characterized in that: The resistance reducing members (4) are provided in multiple groups in the vertical direction.

4. A penetrating knife gate valve according to claim 3, characterized in that: The inner wall of the inner groove (102) is connected to a connecting groove 1 (41); the groove bottom of the connecting groove 1 (41) is connected to a spring (42); the other end of the spring (42) is connected to a connecting frame (43); and a roller (44) is rotatably connected to the connecting frame (43).

5. A penetrating knife gate valve according to claim 4, characterized in that: The sealing member (5) is symmetrically arranged on both sides of the front and rear of the docking port (101); the sealing member (5) comprises connecting pipes (51) which are connected to the plurality of connecting grooves (41) in a one-to-one correspondence; the other ends of the plurality of connecting pipes (51) are commonly connected to an air bag (53) arranged in the connecting groove (52); the connecting groove (52) is connected to the inner groove (102).

6. A penetrating knife gate valve according to claim 5, characterized in that: The connecting frame (43) is equal in size to the notch of the connecting groove 1 (41), and the notch of the connecting groove 1 (41) can be sealed.

7. A penetrating knife gate valve according to claim 5, characterized in that: The air bag (53) is in a □ shape and can block the upper, lower, left, and right sides of the docking port (101).

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