A slide valve

Abstract

The present invention discloses a slide valve, which includes a valve housing. A channel vertically penetrates through the top wall of the valve housing. Inside the valve housing, a number of vertically arranged first guiding I-shaped wheels are rotatably installed side by side on one side of the channel, and a number of second guiding I-shaped wheels corresponding to the first guiding I-shaped wheels are vertically rotatably installed on the opposite side of this side. A horizontally arranged and laterally movable blade is abutted between the first guiding I-shaped wheel and the second guiding I-shaped wheel. A through-cut port matching the cross-section of the channel is vertically opened on the blade. When the blade moves laterally, there is a state in which the through-cut port coincides with the channel. Sealing mechanisms that are always in close contact with the blade are respectively arranged around the edges of the channel on the upper and lower sides of the blade of the valve housing. Openings for the blade to enter and exit are respectively opened at both ends of the valve housing, and a matching cover shell is hermetically connected to each opening. The present invention solves the technical problem of how to ensure the normal opening and closing of the blade and effectively cut off the flowing medium.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a slide valve. Background Art

[0002] A slide valve is a commonly used valve in the discharge pipeline system. Existing slide valves are sealed by setting a gasket between the blade and the outlet end of the valve body, and a pair of symmetrically arranged guide grooves are embedded in the inner wall of the valve body on the opposite sides of the blade to ensure that the blade can operate along a predetermined trajectory. Obviously, due to the presence of particulate matter in the discharge pipeline, during the opening and closing process of the blade, the particulate matter easily enters between the blade and the gasket, and between the blade and the guide grooves, resulting in not only poor sealing performance and short service life, but also easy jamming of the blade and inability to open and close normally, leading to high failure rate and low working efficiency. Summary of the Invention

[0003] In view of the deficiencies in the background art, the present invention provides a slide valve, and the technical problem to be solved is how to ensure the normal opening and closing of the blade and effectively isolate the flowing medium.

[0004] To solve the above technical problems, the present invention provides a slide valve, including a valve housing. A channel vertically penetrates through the top wall of the valve housing, and a plurality of vertically arranged first guiding I-shaped wheels are rotatably installed side by side on one side of the channel inside, and a plurality of second guiding I-shaped wheels corresponding to the first guiding I-shaped wheels are vertically rotatably installed on the opposite side of this side. A horizontally arranged and laterally movable blade is abutted between the first guiding I-shaped wheel and the second guiding I-shaped wheel. A through-opening matching the cross-section of the channel is vertically opened on the blade. When the blade moves laterally, there is a state in which the through-opening coincides with the channel. Sealing mechanisms that are always in close contact with the blade are respectively arranged around the edges of the channel on the upper and lower sides of the blade in the valve housing. Openings for the blade to enter and exit are respectively opened at both ends of the valve housing, and a matching cover shell is hermetically connected to each opening.

[0005] In a preferred embodiment of the present invention, symmetric and horizontally arranged linkage blocks are hinged at both ends of the blade. A pneumatic actuator horizontally arranged between a pair of the linkage blocks is provided on the side of the valve housing, and both ends of the screw of the pneumatic actuator are hinged to the adjacent linkage blocks respectively.

[0006] In a preferred embodiment of the present invention, the sealing mechanism includes an inner retaining strip arranged around the edge of the channel. An outer retaining strip is coaxially sleeved outside the inner retaining strip. A sealing gasket that fits the blade and an elastic block that abuts between the valve housing and the blade are horizontally abutted between the inner retaining strip and the outer retaining strip.

[0007] In a preferred embodiment of the present invention, a cushion block is welded in the area where the valve housing abuts against the elastic block.

[0008] In a preferred embodiment of the present invention, both the sealing gasket and the elastic block are made of polytetrafluoroethylene material.

[0009] In a preferred embodiment of the present invention, collar rings matching the channels are welded on both the top wall and the bottom wall of the valve housing, and flanges matching each other are welded on the free ends of the collar rings.

[0010] In a preferred embodiment of the present invention, the blade is rectangular.

[0011] In a preferred embodiment of the present invention, the channel is cylindrical.

[0012] In a preferred embodiment of the present invention, a pair of symmetrically arranged and Z-shaped reinforcing bars are welded on the inner wall of the cover housing on both sides of the blade.

[0013] In a preferred embodiment of the present invention, a drain port communicating with its inner cavity is welded at the end of the cover housing away from the valve housing.

[0014] Advantages of the present invention: By rotatably mounting a number of pairs of equally spaced and symmetrically arranged first guiding I-shaped wheels and second guiding I-shaped wheels on the opposite sides of the blade for laterally sliding to open and close the valve housing, and respectively enclosing a sealing mechanism that always closely fits the blade at the edges of the channels on both sides of the blade, the technical effects of ensuring the normal opening and closing of the blade and effectively blocking the flowing medium are achieved. Compared with the prior art, it has good sealing performance, long service life, low failure rate, and high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present invention;

[0016] Figure 2 is a partial exploded structural schematic diagram of the present invention;

[0017] Figure 3 is an exploded structural schematic diagram of the sealing mechanism of the present invention;

[0018] Reference numerals in the figures: 1. Valve housing, 11. Channel, 12. Opening, 2. First guiding I-shaped wheel, 3. Second guiding I-shaped wheel, 4. Blade, 41. On-off port, 5. Sealing mechanism, 51. Inner retaining strip, 52. Outer retaining strip, 53. Sealing gasket, 54. Elastic block, 6. Cover housing, 7. Linking block, 8. Pneumatic actuator. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0020] Reference Figure 1 , Figure 2 and Figure 3 As shown: A sliding valve comprises a valve housing 1, and a channel 11 is vertically penetrated on the top wall of the valve housing 1. In this embodiment, the channel 11 is cylindrical. A plurality of first guide wheels 2 are vertically arranged and rotatably installed side by side on one side of the channel 11 inside the valve housing 1, and a plurality of second guide wheels 3 corresponding to the first guide wheels 2 are vertically rotatably installed on the opposite side of the side. A blade 4 that is horizontally arranged and can move laterally is abutted between the first guide wheels 2 and the second guide wheels 3. The blade 4 is rectangular in shape, and a break opening 41 that matches the cross section of the channel 11 is vertically opened on the blade 4. When the blade 4 moves laterally, there is a state in which the break opening 41 coincides with the channel 11. The valve housing 1 is surrounded by a sealing mechanism 5 that is always in close contact with the blade 4 at the edge of the channel 11 on the upper and lower sides of the blade 4. The two sides of the valve housing 1 are sealed. An opening 12 is provided on each end for the blade 4 to enter and exit, and is respectively sealed and connected with a matching cover shell 6. In this embodiment, a plurality of pairs of symmetrically arranged first guide I-shaped wheels 2 and second guide I-shaped wheels 3 are rotatably attached to the opposite sides of the blade 4, which not only ensures that the blade 4 can run according to a predetermined trajectory, but also prevents particulate matter from being stuck between the first guide I-shaped wheel 2 and the blade 4 and between the second guide I-shaped wheel 3 and the blade 4, thereby ensuring the smooth operation of the blade 4. The setting of the sealing mechanism 5 effectively avoids particulate matter in the discharge pipeline from being stuck between it and the blade 4, thereby achieving the technical effect of ensuring the normal opening and closing of the blade 4 and effectively isolating the circulating medium.

[0021] In a preferred embodiment of the present invention, the blade 4 achieves the technical effect of being able to move laterally through the following connection structure: the two ends of the blade 4 are hinged with symmetrical and horizontally arranged linkage blocks 7, and the side of the valve housing 1 is provided with a pneumatic actuator 8 which is laterally arranged between a pair of linkage blocks 7, and the two ends of the screw of the pneumatic actuator 8 are hinged with the respective adjacent linkage blocks 7.

[0022] In a preferred embodiment of the present invention, the sealing mechanism 5 achieves the technical effect of always closely fitting the blade 4 through the following structure: the sealing mechanism 5 includes an inner stop bar 51 arranged around the edge of the channel 11, an outer stop bar 52 is coaxially sleeved outside the inner stop bar 51, a sealing gasket 53 fitting the blade 4 and an elastic block 54 abutting between the valve housing 1 and the blade 4 are horizontally abutted between the inner stop bar 51 and the outer stop bar 52, and the sealing gasket 53 and the elastic block 54 are both made of polytetrafluoroethylene material.

[0023] In a preferred embodiment of the present invention, a cushion block is welded to the area of the valve housing 1 abutting against the elastic block 54 . This arrangement increases the strength of the valve housing 1 at this location and effectively prevents the valve housing 1 from deforming.

[0024] In a preferred embodiment of the present invention, collars matching the passage 11 are welded on the top wall and the bottom wall of the valve housing 1, and matching flanges are welded on the free ends of the collars, which facilitates installation.

[0025] In a preferred embodiment of the present invention, a pair of symmetrically arranged U-shaped reinforcement strips are welded to the inner wall of the cover shell 6 on the upper and lower sides of the blade 4. This arrangement increases the strength of the cover shell 6, thereby effectively extending the service life of the cover shell 6.

[0026] In a preferred embodiment of the present invention, a drain port communicating with the inner cavity of the cover shell 6 is welded at the end away from the valve shell 1 , and such arrangement effectively avoids the accumulation of waste liquid in the cover shell 6 .

[0027] Working principle: first, install the slide valve to the corresponding position through the flange. When it needs to be opened, the screw of the pneumatic actuator 8 is controlled to move forward to drive the blade 4 to move forward laterally. When the on-off port 41 on the blade 4 coincides with the channel 11, the screw of the pneumatic actuator 8 stops moving. When it needs to be closed, the screw of the pneumatic actuator 8 is controlled to move backward to drive the blade 4 to move backward laterally. When the on-off port 41 on the blade 4 is completely offset from the channel 11, the screw of the pneumatic actuator 8 stops moving. In the above process, the sealing gasket 53 in the sealing mechanism 5 is always tightly fitted with the blade 4 under the restoring force of the elastic block 54 to restore the original state.

[0028] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A slide valve, characterized in that, It includes a valve housing. A channel vertically penetrates through the top wall of the valve housing. Inside, several vertically arranged first guiding I-shaped wheels are rotatably installed side by side on one side of the channel, and several second guiding I-shaped wheels corresponding to the first guiding I-shaped wheels are vertically rotatably installed on the opposite side of this side. A horizontally arranged and laterally movable blade is abutted between the first guiding I-shaped wheel and the second guiding I-shaped wheel. A through-and-off port matching the cross-section of the channel is vertically opened on the blade. When the blade moves laterally, there is a state in which the through-and-off port coincides with the channel. Sealing mechanisms that are always in close fit with the blade are respectively arranged around the edges of the channel on the upper and lower sides of the blade in the valve housing. Openings for the blade to enter and exit are respectively opened at both ends of the valve housing, and a matching cover shell is hermetically connected to each opening. The sealing mechanism includes an inner retaining strip arranged around the edge of the channel. An outer retaining strip is coaxially sleeved outside the inner retaining strip. A sealing gasket that fits with the blade and an elastic block abutted between the valve housing and the blade are horizontally abutted between the inner retaining strip and the outer retaining strip.

2. The spool valve according to claim 1, characterized in that, Symmetric and horizontally arranged linkage blocks are hinged at both ends of the blade. A pneumatic actuator located between a pair of the linkage blocks is horizontally arranged on the side of the valve housing. Both ends of the screw of the pneumatic actuator are hinged to the adjacent linkage blocks respectively.

3. The spool valve according to claim 1, characterized in that, A cushion block is welded in the area of the valve housing where it abuts against the elastic block.

4. The spool valve according to claim 1, characterized in that, Both the sealing gasket and the elastic block are made of polytetrafluoroethylene material.

5. The spool valve according to claim 1, wherein, Collars matching the channel are welded on both the top wall and the bottom wall of the valve housing. Flanges matching each other are welded on the free ends of the collars.

6. The spool valve according to claim 1, characterized in that, The blade is rectangular.

7. The spool valve according to claim 1, wherein, The channel is cylindrical.

8. The spool valve according to claim 1, wherein, On the inner wall of the cover shell, a pair of symmetrically arranged and linearly shaped reinforcing bars are welded on the upper and lower sides of the blade.

9. The spool valve according to claim 1, characterized in that, A liquid discharge port communicated with its inner cavity is welded at the end of the cover shell far from the valve housing.

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