A pinch valve inner liner with inflatable seal ring

Abstract

This invention discloses an inner liner for a pinch valve with an inflatable sealing ring, belonging to the field of pinch valves. It includes an outer cylinder, an outer support ring, an inner liner, an inner support ring, an upper cover plate, an inner cover plate, a screw and nut assembly, and an inflation / deflation port. The outer cylinder has outer support rings fixedly connected to its upper and lower ends. The inner liner is placed inside the outer cylinder, with its upper and lower ends sandwiched between the outer and inner support rings. An upper cover plate is fixedly connected above the outer support ring, and an inner cover plate is fixedly connected above the inner support ring. Multiple screw and nut assemblies are fixedly connected in a circular arrangement on the outer sides of the upper and lower inner cover plates. An inflation / deflation port is provided on one side of the upper screw and nut assembly. This invention utilizes an annular interlayer to achieve zero-leakage full closure with a lower shut-off air pressure, reducing the rubber expansion and contraction of the inner liner, improving safety, and increasing its service life.

Description

Technical Field

[0001] This invention relates to the field of pinch valves, and in particular to a pinch valve inner liner with an inflatable sealing ring. Background Technology

[0002] The existing pinch valve liner works by using compressed air to deform the liner and block the valve passage. However, a common problem is that to achieve a zero-leakage, fully closed pinch valve, the outer wall of the liner needs to withstand very high air pressure. Often, to close even a fraction of the fluid passage, the air pressure has to be increased several times, leading to a dramatic increase in the rubber stretch of the liner. This results in severe deformation of the non-closed portion of the liner, sometimes even approaching the safety limit.

[0003] Therefore, it is necessary to design a clamp valve inner liner with an inflatable sealing ring. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art by designing a clamp valve inner liner with an inflatable sealing ring.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a clamp valve inner liner with an inflatable sealing ring, comprising an outer cylinder, an outer support ring, an inner liner, an inner support ring, an upper cover plate, an inner cover plate, a screw and nut assembly, and an inflation / deflation hole. The outer cylinder is fixedly connected to the upper and lower ends of the outer cylinder, and the inner liner is placed inside the outer cylinder. The upper and lower ends of the inner liner are clamped between the outer support ring and the inner support ring. The upper cover plate is fixedly connected above the outer support ring, and the inner cover plate is fixedly connected above the inner support ring. Multiple screw and nut assemblies are fixedly connected in a circumferential arrangement on the outer sides of the upper and lower inner cover plates. An inflation / deflation hole is provided on one side of the upper screw and nut assembly.

[0006] Preferably, the inner liner includes an annular interlayer and a vent hole. The annular interlayer is provided in the middle of the inner liner, and a vent hole is provided on the inner liner behind the annular interlayer.

[0007] Preferably, the rubber on the inner wall of the annular interlayer is thinner and softer than the rubber on the outer wall of the inner liner, making it easier to deform.

[0008] Beneficial effects:

[0009] This invention provides a clamp valve inner liner with an inflatable sealing ring, which has the following advantages: through its structural design, this device utilizes an annular interlayer to achieve zero-leakage full closure with a relatively low shut-off air pressure, reduces the rubber expansion and contraction of the inner liner, improves safety, and increases its service life. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the structure of a clamp valve inner liner with an inflatable sealing ring according to the present invention;

[0011] Figure 2 This is a schematic diagram of the inner liner structure of a clamp valve inner liner with an inflatable sealing ring according to the present invention.

[0012] Figure 3 This is a cross-sectional structural diagram of the inner liner of a pinch valve with an inflatable sealing ring as described in this invention, under sealed conditions.

[0013] In the diagram, 1 is the outer cylinder; 2 is the outer support ring; 3 is the inner bushing; 4 is the inner support ring; 5 is the upper cover plate; 6 is the inner cover plate; 7 is the screw and nut assembly; 8 is the inflation / deflation port; 9 is the annular interlayer; and 10 is the vent. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "set / sleeved," "sleeved," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] Please see Figure 1-3This invention provides a clamp valve inner liner with an inflatable sealing ring, comprising an outer cylinder 1, an outer support ring 2, an inner liner 3, an inner support ring 4, an upper cover plate 5, an inner cover plate 6, a screw and nut assembly 7, and an inflation / deflation hole 8. The outer cylinder 1 is fixedly connected to the upper and lower ends of the outer support ring 2, and the inner liner 3 is placed inside the outer cylinder 1. The upper and lower ends of the inner liner 3 are clamped between the outer support ring 2 and the inner support ring 4. The upper cover plate 5 is fixedly connected above the outer support ring 2, and the inner cover plate 6 is fixedly connected above the inner support ring 4. Multiple screw and nut assemblies 7 are fixedly connected in a circumferential arrangement on the outer sides of the upper and lower inner cover plates 6. An inflation / deflation hole 8 is opened on one side of the upper screw and nut assembly 7.

[0018] The inner liner 3 includes an annular interlayer 9 and a vent hole 10. The annular interlayer 9 is located in the middle of the inner liner 3, and the vent hole 10 is located on the inner liner 3 behind the annular interlayer 9.

[0019] The rubber on the inner wall of the annular interlayer 9 is thinner and softer than the rubber on the outer wall of the inner liner 3, making it more easily deformable. This allows it to expand under air pressure during inflation, with the inner wall of the annular interlayer expanding and deforming more, thus blocking the center of the inner liner.

[0020] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0021] In this implementation plan:

[0022] An annular interlayer 9 is installed at the closed position in the middle of the inner liner channel. The rubber on the inner wall of the interlayer 9 is thinner and softer than the rubber on the outer wall, making it easier to deform. The outer wall of the interlayer is made of high-strength rubber, and at least one vent hole is provided on the outer wall of the interlayer. When the pinch valve is inflated, the compressed air compresses the entire outer wall of the inner liner 3 towards the center, while the annular interlayer 9 expands itself through the vent hole 10. The inner wall of the annular interlayer 9 expands and deforms more, blocking the center of the inner liner 3 and closing the pinch valve. After the external air pressure is removed, the inner liner 3 returns to its initial conductive state due to its own elasticity.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamp valve inner liner with an inflatable sealing ring, comprising an outer cylinder (1), an outer support ring (2), an inner liner (3), an inner support ring (4), an upper cover plate (5), an inner cover plate (6), a screw and nut assembly (7), and an inflation / deflation port (8), characterized in that, The outer cylinder (1) is fixedly connected to the upper and lower ends of an outer support ring (2). An inner liner (3) is placed inside the outer cylinder (1). The upper and lower ends of the inner liner (3) are sandwiched between the outer support ring (2) and the inner support ring (4). An upper cover plate (5) is fixedly connected above the outer support ring (2). An inner cover plate (6) is fixedly connected above the inner support ring (4). Multiple screw and nut assemblies (7) are fixedly connected in a circular arrangement on the outer side of the upper and lower inner cover plates (6). An air inlet / outlet hole (8) is opened on one side of the upper screw and nut assembly (7).

2. The inner bushing of a clamp valve with an inflatable sealing ring according to claim 1, characterized in that, The inner liner (3) includes an annular interlayer (9) and a vent hole (10). The annular interlayer (9) is provided in the middle of the inner liner (3), and the vent hole (10) is provided on the inner liner (3) behind the annular interlayer (9).

3. The inner bushing of a clamp valve with an inflatable sealing ring according to claim 2, characterized in that, The rubber on the inner wall of the annular interlayer (9) is thinner and softer than the rubber on the outer wall of the inner liner (3), making it easier to deform.

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