Novel sliding plate valve sealed by corrugated pipe

Abstract

The utility model provides a novel corrugated pipe sealed sliding plate valve which comprises a valve body and a sliding plate, a sliding plate cavity is formed in the valve body, the sliding plate is installed in the sliding plate cavity, a piston rod is arranged at the upper end of the sliding plate, the lower end of the piston rod is installed on a guide plate, and the sliding plate is installed on the two sides of the guide plate through springs. The upper end of the piston rod is installed on the air cylinder, a cylinder body of the air cylinder is installed on the support, the support is installed on the valve body, the corrugated pipe is arranged on the outer side of the piston rod, the corrugated pipe stretches and retracts up and down along with the piston rod, and the corrugated pipe is installed on the support. Opening and closing of the valve are not affected, the sealing filler is sealed through the corrugated pipe, the risk of medium leakage is effectively reduced, and the practical performance is excellent.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, specifically to a novel bellows-sealed slide valve. Background Technology

[0002] The fluid flowing through the slide gate valve exhibits stable flow and is easily controlled, reducing adverse factors such as cavitation and erosion on the valve's internal components, significantly extending the valve's service life and expanding its application range. Compared to single / double-seat disc valves, slide gate control valves are more compact in structure and have a much smaller heat dissipation area, resulting in less heat loss; this also meets the current demand for energy-saving products. In particular, slide gate control valves eliminate the upper valve cover of linear single / double-seat valves, making their structure both lightweight and simple, while also eliminating external leakage. Slide gate control valves have a short stroke and fast control speed because the stroke depends on the width of the throttling groove on the slide. With a throttling groove width of <10mm, the stroke is short. Due to the small unbalanced force, short stroke, and small actuator volume of the slide gate control valve, it can respond quickly to control signals and complete the adjustment action in a very short time, with a total stroke time of less than 2.8s (on / off only requires 0.2s). However, current slide valves use a linear stroke, and the valve body and valve stem seal is a sliding seal. Using packing, it is difficult to achieve zero leakage. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a novel bellows-sealed slide valve to address the issues raised in the background art.

[0004] The technical problem solved by this utility model is achieved by the following technical solution: a novel bellows-sealed slide valve, comprising: a valve body and a slide plate, wherein the valve body is provided with a slide plate cavity, the slide plate is installed in the slide plate cavity, a piston rod is provided at the upper end of the slide plate, the lower end of the piston rod is installed on a guide plate, the slide plate is installed on both sides of the guide plate by springs, the upper end of the piston rod is installed on a cylinder, the cylinder body of the cylinder is installed on a bracket, the bracket is installed on the valve body, a bellows is provided on the outer side of the piston rod, the bellows extends and retracts with the piston rod, and the bellows is installed on the bracket.

[0005] Furthermore, the lower end of the piston rod has a disc-shaped flange surface that is larger than the piston rod diameter.

[0006] Furthermore, the upper end of the bellows is welded to the lower flange of the piston rod as a whole or connected as a whole with bolts and a sealing gasket, and the lower end is welded to the valve body as a whole or connected as a whole with bolts and a sealing gasket.

[0007] Furthermore, the lower end of the piston rod is fixedly connected to the guide plate as a whole, a spring is arranged in the spring mounting hole inside the guide plate, and sliding plates are movably installed at both ends of the guide plate to form a sliding plate assembly.

[0008] Compared with the prior art, the advantages of this utility model are: this utility model does not affect the opening and closing of the valve, the sealing packing adopts bellows sealing, which effectively reduces the risk of media leakage and has excellent practical performance. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 This is a side view schematic diagram of the present invention.

[0011] Figure 3 This is a schematic diagram of the piston rod installation of this utility model. Detailed Implementation

[0012] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0013] Example 1

[0014] like Figures 1-3 As shown, a novel bellows-sealed slide valve includes: a valve body 1 and a slide plate 5. The valve body 1 has a slide plate cavity, and the slide plate 5 is installed in the slide plate cavity. A piston rod 3 is provided at the upper end of the slide plate, and the lower end of the piston rod 3 is installed on a guide plate 6. The slide plate 5 is mounted on both sides of the guide plate 6 by springs 7. The upper end of the piston rod 3 is installed on a cylinder 2, and the cylinder body of the cylinder 2 is installed on a bracket 8. The bracket 8 is installed on the valve body 1. A bellows 4 is provided on the outer side of the piston rod 3, and the bellows 4 extends and retracts with the piston rod 3. The bellows 4 is installed on the bracket 8. The lower end of the piston rod 3 has a disc-shaped flange surface larger than the piston rod diameter.

[0015] Example 2

[0016] like Figures 1-3As shown, a novel bellows-sealed slide valve includes: a valve body 1 and a slide plate 5. The valve body 1 has a slide plate cavity, and the slide plate 5 is installed in the slide plate cavity. A piston rod 3 is provided at the upper end of the slide plate, and the lower end of the piston rod 3 is installed on a guide plate 6. The slide plate 5 is mounted on both sides of the guide plate 6 by springs 7. The upper end of the piston rod 3 is installed on a cylinder 2, and the cylinder body of the cylinder 2 is installed on a bracket 8. The bracket 8 is installed on the valve body 1. A bellows 4 is provided on the outer side of the piston rod 3, and the bellows 4 extends and retracts with the piston rod 3. The bellows 4 is installed on the bracket 8. The upper end of the bellows 4 is welded to the flange face of the lower end of the piston rod 3 as a whole or connected as a whole by bolts and a sealing gasket, and the lower end is welded to the valve body 1 as a whole or connected as a whole by bolts and a sealing gasket.

[0017] Example 3

[0018] like Figures 1-3 As shown, a novel bellows-sealed slide valve includes: a valve body 1 and a slide plate 5. The valve body 1 has a slide plate cavity, and the slide plate 5 is installed in the slide plate cavity. A piston rod 3 is provided at the upper end of the slide plate, and the lower end of the piston rod 3 is installed on a guide plate 6. The slide plate 5 is installed on both sides of the guide plate 6 by springs 7. The upper end of the piston rod 3 is installed on a cylinder 2, and the cylinder body of the cylinder 2 is installed on a bracket 8. The bracket 8 is installed on the valve body 1. A bellows 4 is provided on the outer side of the piston rod 3, and the bellows 4 extends and retracts with the piston rod 3. The bellows 4 is installed on the bracket 8. The lower end of the piston rod 3 is fixedly connected to the guide plate 6 as a whole. A spring 7 is arranged in the spring mounting hole inside the guide plate 6. The slide plates 5 are movably installed at both ends of the guide plate 6 to form a slide plate assembly.

[0019] This utility model discloses a bellows-sealed sliding plate valve, comprising a valve body 1, a cylinder 2, a piston rod 3, a bellows 4, a sliding plate 5, a guide plate 6, a spring 7, and a bracket 8. The cylinder 2 and piston rod 3 are mounted together to form an actuator. The lower end of the piston rod 3 has a disc-shaped flange face larger than the piston rod diameter. The upper end of the bellows 4 is welded to the lower flange face of the piston rod 3 or bolted and sealed together, while the lower end is welded to the valve body 1 or bolted and sealed together.

[0020] The lower end of the piston rod 3 is fixedly connected to the guide plate 6 as a whole. A spring 7 is arranged in the spring mounting hole inside the guide plate 6, and sliding plates 5 are movably mounted at both ends of the guide plate 6. This constitutes the sliding plate assembly.

[0021] The slide plate assembly is installed inside the valve body 1. A bracket 8 is installed on the upper part of the valve body 1, and the cylinder 2 is installed on the upper part of the bracket 8.

[0022] This utility model features a simple structure and convenient use, meeting the application requirements of slide valves in petrochemical plants. It is easy to operate and open and close the slide valve. The sealing packing adopts a bellows seal to ensure that the atmospheric sealing layer between the valve stem and the valve body is tight, effectively reducing the risk of media leakage and improving the leakage level.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel bellows sealed slide plate valve comprising: Valve body (1), sliding plate (5), characterized in that: the valve body (1) is provided with sliding plate cavity, the sliding plate (5) is installed in the sliding plate cavity, the upper end of the sliding plate is provided with piston rod (3), the lower end of the piston rod (3) is installed on the guide plate (6), the sliding plate (5) is installed on both sides of the guide plate (6) through the spring (7), the upper end of the piston rod (3) is installed on the cylinder (2), the cylinder body of the cylinder (2) is installed on the support (8), the support (8) is installed on the valve body (1), the outer side of the piston rod (3) is provided with bellows (4), the bellows (4) is telescopic with the piston rod (3) up and down, the bellows (4) is installed on the support (8).

2. A new bellows sealed slide valve according to claim 1 characterized by: The lower end of the piston rod (3) has a flange face larger than the diameter of the piston rod.

3. A new bellows sealed slide plate valve according to claim 1 characterized by: The upper end of the bellows (4) is welded with the lower end flange face of the piston rod (3) into one body or connected into one body by bolt and sealing pad, and the lower end is welded with the valve body (1) into one body or connected into one body by bolt and sealing pad.

4. A new bellows sealed slide plate valve according to claim 1 characterized by: The lower end of the piston rod (3) is fixedly connected with the guide plate (6), the spring (7) is arranged in the spring mounting hole in the guide plate (6), and the sliding plate (5) is movably installed at both ends of the guide plate (6).

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