High-stability hydraulic sandwich valve

Abstract

The high-stability hydraulic sandwich valve comprises an upper valve body and a lower valve body which are detachably connected to the upper side and the lower side of a middle valve body, a valve plate assembly is arranged on the middle valve body in a sliding mode, the valve plate assembly comprises a valve plate main body and valve plate steel rings installed on the two sides of the valve plate main body, and a driving hydraulic cylinder is arranged on the upper valve body and / or the lower valve body. A connecting plate is arranged at one end of the driving hydraulic cylinder, a push-pull rod is detachably installed on the connecting plate, and one end of the push-pull rod is connected with the valve plate body. The upper valve body and the lower valve body are respectively provided with a valve body steel ring, the upper valve body and the lower valve body are respectively provided with an air communicating hole, and a valve rod is arranged on the air communicating holes. According to the sandwich valve, the valve plate is effectively prevented from inclining by balancing the pressure on the two sides of the valve plate, the abrasion degree of the valve plate in the opening and closing process is reduced through mixed use of various materials, the service life is prolonged, the structure is simple and compact, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping plate valves, in particular to a hydraulic clamping plate valve with high stability. Background Art

[0002] In the process of repairing, rerouting, adding branches and other construction of existing gas pipelines, in order not to affect the gas consumption of users on the line, the pipeline non-stop construction method is often adopted. Pipeline non-stop construction requires welding pipe fittings on the pipeline, and then installing clamp valves, hole openers, plugging devices and other equipment on the pipe fittings to complete the opening and plugging of the pipeline, and then complete the maintenance, rerouting, adding branches and other work of the pipeline. The medium in the pipeline is isolated from the outside of the pipeline by opening and closing the clamp valve. During the construction process, the replacement of hole openers, plugging devices and other equipment requires frequent opening and closing of the clamp valve. The air tightness and opening and closing speed of the clamp valve have an important impact on the safety and efficiency of the construction process.

[0003] The existing splint valves generally have packing seals between the gate push-pull rod and the middle plate of the splint valve, which are compressed by a compression cover, and the valve body is generally made of the same material. If it is a ferrous metal, it is heavier, and if it is a non-ferrous metal, it is lower in hardness and has a shorter service life. After long-term use of the packing, this type of seal is affected by factors such as wear and aging, and gradually loses its sealing performance, resulting in seal failure. Hydraulic splint valves are generally installed on pressurized pipelines. When opening and closing the valve plate, the valve plate is subjected to greater pressure from one side of the pipeline, resulting in greater friction resistance when the valve plate moves. A greater force needs to be applied to pull the valve plate, which can easily cause friction damage to the valve plate, seriously affecting its service life. When the splint valve is closed, the lower side of the valve core is lifted upward by the pipeline pressure and combined with the upper valve body boss surface to form a seal. The valve plate and the transmission part are integrated, and the pressure imbalance will cause the transmission part to tilt. Utility Model Content

[0004] The utility model aims to provide a high-stability hydraulic clamping plate valve, which effectively prevents the valve plate from tilting by balancing the pressure on both sides of the valve plate, and reduces the degree of wear of the valve plate during opening and closing by mixing a variety of materials, thereby extending the service life, and has a simple and compact structure and strong practicality.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-stability hydraulic clamping valve comprises an upper valve body and a lower valve body which are detachably connected to the upper and lower sides of a middle valve body, a valve plate assembly is slidably arranged on the middle valve body, the valve plate assembly comprises a valve plate body and valve plate steel rings installed on both sides of the valve plate body, a driving hydraulic cylinder is arranged on the upper valve body and / or the lower valve body, a connecting plate is arranged at one end of the driving hydraulic cylinder, a push-pull rod is detachably mounted on the connecting plate, one end of the push-pull rod is connected to the valve plate body; valve body steel rings are respectively arranged on the upper valve body and the lower valve body, an air string hole is respectively arranged on the upper valve body and the lower valve body, and a valve stem is arranged on the air string hole.

[0007] Preferably, a driving hydraulic cylinder is fixedly provided on each of the upper valve body and the lower valve body, and one end of each of the two driving hydraulic cylinders is fixedly connected to the connecting plate.

[0008] Preferably, a first sealing ring is provided between the valve plate body and the valve plate steel ring.

[0009] Preferably, a second sealing ring is provided between the valve body steel ring and the upper valve body or the lower valve body.

[0010] Preferably, the valve plate main body, the upper valve body and the lower valve body are all made of non-ferrous metal materials; the valve body steel ring and the valve plate steel ring are both made of high-hardness ferrous metal.

[0011] Preferably, a plurality of lifting ears are detachably mounted on the middle valve body.

[0012] Preferably, the cross-sections of the valve body steel ring and the valve plate steel ring are both wedge-shaped.

[0013] In the utility model, the valve stem is used to adjust the opening and closing of the two air strings, thereby realizing balanced adjustment of the pressure on both sides of the valve plate body, preventing the valve plate body from tilting due to different pressures on both sides of the valve plate body, avoiding the problem of excessive wear of the valve plate body when opening due to pressure difference, reducing friction damage to the valve plate body, and improving the service life. The valve body steel ring and valve plate steel ring are made of high-hardness ferrous metal, and the valve plate body, upper valve body and lower valve body are made of non-ferrous metal materials, which not only ensures the amount of wear on the contact surface due to friction, but also effectively reduces the weight of the overall structure, realizing a lightweight design of the product. The two driving hydraulic cylinders are able to provide a stable and balanced push-pull force to the push-pull rod, thereby improving the stability of the opening and closing of the clamp valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the AA section of the utility model;

[0016] Figure 3 This is a schematic diagram of the BB section of the utility model;

[0017] Figure 4 It is an enlarged schematic diagram of the local structure of the utility model;

[0018] In the figure: 1. middle valve body; 2. upper valve body; 3. lower valve body; 4. valve plate assembly; 5. valve body steel ring; 6. driving hydraulic cylinder; 7. connecting plate; 8. push-pull rod; 9. air hole; 10. valve stem; 11. lifting ear; 40. valve plate body; 41. valve plate steel ring. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 A high-stability hydraulic clamp valve is shown, comprising an upper valve body 2 and a lower valve body 3 detachably connected to the upper and lower sides of a middle valve body 1 by bolts, and a sealing rubber ring is provided between the upper valve body 2 and the middle valve body 1 and between the lower valve body 3 and the middle valve body 1 to avoid leakage during use. The middle valve body 1, the upper valve body 2 and the lower valve body 3 are all made of non-ferrous metal materials. In this embodiment, the middle valve body 1, the upper valve body 2 and the lower valve body 3 are made of aluminum alloy materials, so that the clamp valve has a light weight.

[0021] The upper valve body 2 and the lower valve body 3 are respectively fixed with valve body steel rings 5 ​​by fasteners. The valve body steel rings 5 ​​are made of high-hardness black metal, specifically 40Cr. The cross-section of the valve body steel rings 5 ​​is wedge-shaped. The upper valve body 2 and the lower valve body 3 are provided with inclined surfaces adapted to the valve body steel rings 5. After the valve body steel rings 5 ​​are installed, the surface is flush with the surface of the upper valve body 2 or the lower valve body 3. A second sealing ring is provided between the valve body steel ring 5 and the upper valve body 2 or the lower valve body 3. The second sealing ring is an O-type sealing rubber ring.

[0022] A valve plate assembly 4 slides on the middle valve body 1. The valve plate assembly 4 includes a valve plate body 40 and a valve plate steel ring 41 fixedly installed at the outer edges of the upper and lower sides of the valve plate body 40 by fasteners. The valve plate steel ring 41 is made of high-hardness black metal, specifically made of 40Cr material. The cross-section of the valve plate steel ring 41 is wedge-shaped. Inclined surfaces matching the valve plate steel ring 41 are provided on the upper and lower sides of the valve plate body 40. After the valve plate steel ring 41 is installed, the surface is flush with the surface of the valve plate body 40. The valve plate body 40 is made of non-ferrous metal material. In this embodiment, the valve plate body 40 is made of aluminum alloy material. A first sealing ring is provided between the valve plate body 40 and the valve plate steel ring 5. The first sealing ring is an O-type sealing rubber ring. A sealing rubber ring is also provided between the valve plate steel ring 5 and the valve plate steel ring 41 to improve the sealing ability of the overall structure.

[0023] A driving hydraulic cylinder 6 is provided on the upper valve body 2 and / or the lower valve body 3, a connecting plate 7 is fixedly provided at one end of the driving hydraulic cylinder 6, a push-pull rod 8 is detachably installed on the connecting plate 7 through a thread, one end of the push-pull rod 8 is connected to the valve plate body 40 through a thread, when the driving hydraulic cylinder 6 is extended or retracted, the valve plate body 40 is driven by the push-pull rod 8 to perform a linear reciprocating motion, so as to realize the opening and closing of the clamp valve. In a preferred embodiment, a driving hydraulic cylinder 6 is fixedly provided on both the upper valve body 2 and the lower valve body 3, one end of the two driving hydraulic cylinders 6 are fixedly connected to the connecting plate 7, and provide a stable push-pull force for the push-pull rod 8.

[0024] An air connection hole 9 is provided on the upper valve body 2 and the lower valve body 3, respectively, and a valve stem 10 is provided on the air connection hole 9. When in use, the two air connection holes 9 are connected or relatively closed by screwing the valve stem 10, so as to realize the air pressure adjustment on both sides of the valve plate assembly 4. A valve stem cap is provided at one end of the valve stem 10, and an arrow and on / off words are engraved on the valve stem cap, so that the operator can understand the on / off status of the two air connection holes 9. A through hole corresponding to the air connection hole 9 is provided on the middle valve body 1.

[0025] A plurality of lifting ears 11 are detachably mounted on the middle valve body 1 through threads, and the lifting ears 11 facilitate the operator to lift the clamp valve. During operation, a plugging pipe is mounted on the bottom of the lower valve body 3, and an adapter for a hole opening device, a plugging device or a cleaning device is mounted on the top of the upper valve body 2. The clamp valve is used to control the on-off between the plugging pipe and the adapter.

[0026] The above embodiments are only some descriptions of the concept and implementation of the utility model, and are not intended to limit the concept and implementation of the utility model. Under the concept of the utility model, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A high-stability hydraulic clamping valve, comprising an upper valve body and a lower valve body detachably connected to the upper and lower sides of a middle valve body, characterized in that: A valve plate assembly is slidably arranged on the middle valve body, and the valve plate assembly includes a valve plate body and valve plate steel rings installed on both sides of the valve plate body; a driving hydraulic cylinder is arranged on the upper valve body and / or the lower valve body, a connecting plate is arranged at one end of the driving hydraulic cylinder, a push-pull rod is detachably mounted on the connecting plate, and one end of the push-pull rod is connected to the valve plate body; valve body steel rings are respectively arranged on the upper valve body and the lower valve body, an air string hole is respectively arranged on the upper valve body and the lower valve body, and a valve stem is arranged on the air string hole.

2. The high stability hydraulic clamping valve according to claim 1, characterized in that: A driving hydraulic cylinder is fixedly arranged on each of the upper valve body and the lower valve body, and one end of each of the two driving hydraulic cylinders is fixedly connected to the connecting plate.

3. The high stability hydraulic clamping valve according to claim 1 or 2, characterized in that: A first sealing ring is arranged between the valve plate body and the valve plate steel ring.

4. The high stability hydraulic clamping valve according to claim 3, characterized in that: A second sealing ring is arranged between the valve body steel ring and the upper valve body or the lower valve body.

5. The high stability hydraulic clamping valve according to claim 1 or 4, characterized in that: The valve plate main body, the upper valve body and the lower valve body are all made of non-ferrous metal materials; the valve body steel ring and the valve plate steel ring are both made of high-hardness ferrous metal.

6. The high stability hydraulic clamping valve according to claim 1, characterized in that: A plurality of lifting ears are detachably mounted on the middle valve body.

7. The high stability hydraulic clamping valve according to claim 5, characterized in that: The cross sections of the valve body steel ring and the valve plate steel ring are both wedge-shaped.

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