A multi-stage pneumatic tube clamp valve

Abstract

A multi-stage pneumatic clamp valve includes a housing and an inner sleeve. The housing consists of an upper housing and a lower housing, which are connected by bolts. The inner sleeve is fitted inside the housing. A telescopic rod is installed inside the upper housing, and a first extrusion plate is installed at the telescopic end of the telescopic rod. Two cylinder tubes are symmetrically arranged inside the lower housing, located on both sides of the inner sleeve. An extrusion rod is fixed at each end of the first extrusion plate, and the lower end of the extrusion rod is located inside the cylinder tube. A piston is provided at the bottom end of the extrusion rod inside the cylinder tube. A telescopic cylinder is connected to the bottom of the cylinder tube, and a second extrusion plate symmetrical to the first extrusion plate is installed at the telescopic end of the telescopic cylinder. A sealing ring is provided inside the inner sleeve near the discharge end, and a sealing plate matching the sealing ring is movable near the sealing ring. This invention has advantages such as easy maintenance and backflow prevention.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic clamp valve technology, and in particular to a multi-stage pneumatic clamp valve. Background Technology

[0002] Pneumatic pinch valves are a new type of valve improved from manual pinch valves to meet special customer requirements. They consist of upper and lower cast iron / cast steel valve bodies, rubber tubing, large and small valve stems, gate, upper and lower guide pillars, and a pneumatic actuator. A drive unit can also be selected as needed. Pneumatic pinch valves are widely used in chemical, petroleum, power, metallurgical, and wastewater treatment industries.

[0003] Existing pneumatic clamp valves typically use air pressure to compress the inner rubber sleeve, causing it to contract and thus complete the on / off process. This method results in a large gas action area, requires high pressure, has a long action time, and low sensitivity. Furthermore, it is bidirectional, limiting its applicability and leaving room for improvement. Utility Model Content

[0004] This invention provides a multi-stage pneumatic clamp valve to solve the problems mentioned in the background art.

[0005] To address the aforementioned problems, this utility model provides a multi-stage pneumatic clamp valve, comprising a housing and an inner sleeve. The housing consists of an upper housing and a lower housing, which are connected by bolts. A first flange is located on one side of the housing, and a second flange is located on the other side. The inner sleeve is fitted inside the housing, and both ends of the inner sleeve are bolted to the first flange and the second flange, respectively. A telescopic rod is installed inside the upper housing, and a first compression plate is installed at the telescopic end of the telescopic rod. Two cylinder tubes are symmetrically arranged inside the lower housing, located on both sides of the inner sleeve. The first compression plate... A pressing rod is fixed at each end, and the lower end of the pressing rod is located inside the cylinder tube. A piston is provided at the bottom end of the pressing rod inside the cylinder tube. A telescopic cylinder is connected to the bottom of the cylinder tube, and a second pressing plate symmetrical to the first pressing plate is installed at the telescopic end of the telescopic cylinder. A sealing ring is provided inside the inner sleeve near the discharge end, and two connecting seats are symmetrically provided at the top near the sealing ring. A support plate is movably connected to the inner sleeve through the two connecting seats, and a threaded adjusting rod is threadedly connected to the support plate. A sealing plate matching the sealing ring is movably connected to the end of the threaded adjusting rod near the sealing ring.

[0006] Preferably, the top of the cylinder tube is provided with a limiting tube, and a sliding groove is opened inside the limiting tube, and the extrusion rod is matched with the limiting tube.

[0007] Preferably, the sealing plate has two guide rods symmetrically arranged on both sides of the threaded adjusting rod, which are slidably connected to the support plate.

[0008] The beneficial effects of adopting the above technical solutions are:

[0009] 1. The upper and lower shells, along with the first and second flanges, facilitate the installation and removal of the inner sleeve within the shell, thus simplifying maintenance.

[0010] 2. The first extrusion plate is moved downward by the telescopic rod in the upper housing, thereby extruding the inner sleeve. At the same time, the extrusion rod moves downward, causing the piston to move inside the cylinder tube. This extrusion causes gas to enter the telescopic cylinder, which in turn drives the second extrusion plate to move upward. The downward movement of the first extrusion plate and the upward movement of the second extrusion plate create a relative extrusion operation on the inner sleeve, thereby completing the on / off operation. This results in a simple structure that is easy to maintain.

[0011] 3. The sealing cap and sealing ring design allow for unidirectional flow within the inner sleeve, improving its versatility. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a cross-sectional three-dimensional structural diagram of the interior of this utility model.

[0014] Wherein: 1-Shell; 11-Upper shell; 12-Lower shell; 13-First flange; 14-Second flange; 2-Telescopic rod; 21-First extrusion plate; 22-Cylinder tube; 23-Extrusion rod; 24-Piston; 25-Telescopic cylinder; 26-Second extrusion plate; 27-Limiting tube; 28-Slide groove; 3-Sealing ring; 31-Connecting seat; 32-Support plate; 33-Threaded adjusting rod; 34-Sealing plate; 35-Guide rod. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1-2 In this embodiment, a multi-stage pneumatic clamp valve includes a housing 1 and an inner sleeve 15. The housing 1 consists of an upper housing 11 and a lower housing 12, which are connected by bolts. A first flange 13 is provided on one side of the housing 1, and a second flange 14 is provided on the other side. The inner sleeve 15 is fitted inside the housing 1, and both ends of the inner sleeve 15 are bolted to the first flange 13 and the second flange 14, respectively. A telescopic rod 2 is installed inside the upper housing 1, and a first pressing plate 21 is installed in the telescopic end of the telescopic rod 2. Two cylinder tubes 22 are symmetrically installed inside the lower housing 12, located on both sides of the inner sleeve 15. The two ends of the first pressing plate 21 are respectively fixed... A pressing rod 23 is provided, and the lower end of the pressing rod 23 is located inside the cylinder tube 22. A piston 24 is provided at the bottom end of the pressing rod 23 inside the cylinder tube 22. A telescopic cylinder 25 is connected to the bottom of the cylinder tube 22, and a second pressing plate 26 symmetrical to the first pressing plate 23 is installed at the telescopic end of the telescopic cylinder 25. A sealing ring 3 is provided inside the inner sleeve 15 near the discharge end, and two connecting seats 31 are symmetrically provided at the top near the sealing ring 3. A support plate 32 is movably connected to the inner sleeve 15 through the two connecting seats 31, and a threaded adjusting rod 33 is threadedly connected to the support plate 32. A sealing plate 34 matching the sealing ring 3 is movably connected to the end of the threaded adjusting rod 33 near the sealing ring 3.

[0019] With the above technical solution, when the equipment is in use, the medium enters the inner sleeve 15 from the first flange 13, thereby causing the sealing plate 34 to disengage from the sealing ring 3, allowing the inner sleeve 15 to flow. When the valve body needs to cut off, the telescopic rod 2 operates, driving the first extrusion plate 21 to move downward, thereby causing the first extrusion plate 21 to extrude the upper part of the inner sleeve 15. At the same time, the first extrusion plate 21 drives the extrusion rod 23 to move in the cylinder tube 22, and the piston 24 extrudes the gas in the cylinder tube 22, causing the gas to be compressed into the telescopic cylinder 25. The air pressure causes the telescopic cylinder 25 to work, thereby causing the second extrusion plate 26 to move upward. Through the relative work of the first extrusion plate 21 and the second extrusion plate 26, the inner sleeve 15 is cut off, reducing the structural cost and improving the switching efficiency. When the inner sleeve 15 is cut off by the first extrusion plate 21 and the second extrusion plate 26, under the action of backflow, it will push in the opposite direction, causing the sealing plate 34 to extrude the sealing ring 3, thereby preventing backflow and realizing unidirectional flow, improving the targeted use of the equipment.

[0020] Preferably, the top of the cylinder tube 22 is provided with a limiting tube 27, and a sliding groove 28 is provided inside the limiting tube 27, and the extrusion rod 23 is matched with the limiting tube 27.

[0021] Through the above technical solution, the limiting tube 27 matches the movement of the extrusion rod 23, thereby ensuring the stability of the movement. The setting of the slide groove 28 ensures that the movement of the first extrusion plate 21 is not hindered when the extrusion rod 23 moves down, thus ensuring the stability of the first extrusion plate 21 in extruding and cutting off the inner sleeve 15.

[0022] Preferably, the sealing plate 34 has two guide rods 35 symmetrically arranged on both sides of the threaded adjusting rod 33, which are slidably connected to the support plate 32.

[0023] Through the above technical solution, the threaded adjusting rod 33 can adjust the position of the sealing plate 34, thereby ensuring that the sealing plate 34 can stably abut against the sealing ring 3. The guide rod 35 is provided to limit the movement direction of the sealing plate 34, thereby ensuring the stability of the adjustment of the sealing plate 34.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit the technical solutions described in this utility model. Therefore, although this specification has described this utility model in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model, and all technical solutions and improvements that do not depart from the spirit and scope of this utility model should be covered within the scope of the claims of this utility model; technologies not described in detail in this utility model are implemented using existing technologies.

Claims

1. A multi-stage pneumatic clamp valve, comprising a housing and an inner sleeve, characterized in that: The housing consists of an upper housing and a lower housing, which are connected by bolts. A first flange is located on one side of the housing, and a second flange is located on the other side. An inner sleeve is fitted inside the housing, and both ends of the inner sleeve are bolted to the first flange and the second flange, respectively. A telescopic rod is installed inside the upper housing, and a first extrusion plate is installed at the telescopic end of the telescopic rod. Two cylinder tubes are symmetrically arranged inside the lower housing, located on both sides of the inner sleeve. An extrusion rod is fixed to each end of the first extrusion plate, and the lower end of the extrusion rod... The extrusion rod is located inside the cylinder tube. A piston is provided at the bottom end of the extrusion rod inside the cylinder tube. A telescopic cylinder is connected to the bottom of the cylinder tube. A second extrusion plate, symmetrical to the first extrusion plate, is installed at the telescopic end of the telescopic cylinder. A sealing ring is provided inside the inner sleeve near the discharge end. Two connecting seats are symmetrically provided at the top near the sealing ring. A support plate is movably connected to the inner sleeve through the two connecting seats. A threaded adjusting rod is threadedly connected to the support plate. A sealing plate matching the sealing ring is movably connected to the end of the threaded adjusting rod near the sealing ring.

2. A multi-stage pneumatic tube clamp valve according to claim 1, characterized in that: The cylinder tube is provided with a limiting tube at the top, and a sliding groove is provided inside the limiting tube. The extrusion rod is matched with the limiting tube.

3. A multi-stage pneumatic tube clamp valve according to claim 1, wherein: The sealing plate has two guide rods symmetrically arranged on both sides of the threaded adjusting rod, which are slidably connected to the support plate.

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