One-way isolating valve

Abstract

The utility model discloses a one-way isolating valve which comprises a valve body, and the valve body is fixedly connected with a driving device bolt through a support. The output end of the driving device is in transmission connection with the driving shaft; the driving shaft is in transmission connection with the driven shaft through the rotating arm and the connecting rod; the two ends of the driving shaft and the two ends of the driven shaft are rotationally connected with the valve body through rolling bearings correspondingly. The driving shaft is fixedly connected with the upper valve plate through one connecting sleeve, and the driven shaft is fixedly connected with the lower valve plate through the other connecting sleeve. A valve seat is fixed on the inner side of the valve body, and the valve seat is tightly attached to the valve plate when the one-way isolating valve is closed; and the upper end of the valve plate is bent towards one side far away from the sealing ring. The isolating valve solves the problems that an existing isolating valve structure is too long and the installation process is complex.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a one-way isolation valve. Background Art

[0002] Isolation valves are common equipment in the ventilation system of nuclear island plants. They are driven fully open or fully closed by electric or manual devices to isolate the ventilation system.

[0003] Isolation valves are widely used and can be installed in a wide range of pipe diameters. In nuclear power plants, their installation locations must be adjusted according to the space available. As plant systems continue to upgrade, the requirements for safety factors continue to increase, so safer low-leakage valves are becoming more widely used.

[0004] Because the valve plate of the traditional isolation valve is constrained by multiple opening restriction mechanisms, the running track is complex, and it is affected by the distribution of components, such as the interference between the valve plate and the sealing ring, and between the valve plate and the pin of the fixed shaft. Therefore, the structure length is too long and the installation process is complicated, which is not suitable for compact space. Under the premise of ensuring the sealing level, compressing the valve structure length, improving the flexibility of valve installation and reducing the installation production process are the mainstream trends of the new isolation valve structure today. Summary of the invention

[0005] In order to achieve the above-mentioned purpose, the utility model provides a one-way isolation valve, which solves the problem that the existing isolation valve has a too long structure length and a complicated installation process.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a one-way isolation valve, including a valve body, which is fixedly connected to the driving device by bolts through a bracket; the output end of the driving device is transmission-connected to the driving shaft, and the driving shaft is transmission-connected to the driven shaft through a swing arm and a connecting rod; the two ends of the driving shaft and the driven shaft are rotationally connected to the valve body through rolling bearings respectively; the driving shaft is fixedly connected to the upper valve plate through a connecting sleeve, and the driven shaft is fixedly connected to the lower valve plate through another connecting sleeve; a valve seat is fixed to the inside of the valve body, and the valve seat is tightly attached to the valve plate when the one-way isolation valve is closed; the upper end of the valve plate is bent toward the side away from the sealing ring.

[0007] Furthermore, a pad is provided on the right side of the valve plate, a U-shaped channel steel is provided on the right side of the pad, and the U-shaped channel steel, the pad and the valve plate are fixedly connected; the connecting sleeve is fixed in the arc-shaped groove at the upper end of the U-shaped channel steel.

[0008] Furthermore, a sealing ring is installed in the valve seat, and when the one-way isolation valve is closed, the sealing ring in the valve seat is in close contact with the valve plate.

[0009] Furthermore, a guide plate is welded and fixed to a side of the valve seat away from the valve plate.

[0010] Furthermore, the guide plate on the valve seat located in the middle of the valve body is V-shaped; the guide plates on the valve seats located at the top and bottom of the valve body are I-shaped and a right triangle is formed between the guide plates, the valve body and the valve seat, and the angle between the top and bottom guide plates and the valve body is no more than 45 degrees.

[0011] The beneficial effects of the utility model are:

[0012] The valve plate of the one-way isolation valve provided by the utility model has a compact structure, a flexible action process, and a high structural strength, and can reduce the requirement on the size of the valve body.

[0013] Compared with the existing isolation valve, the utility model has a compact internal structure and a more reasonable design, a smaller structural length, and can be used in compact installation locations against walls or at the turning points of equipment inlet and outlet pipes; at the same time, the installation process is simple and convenient, saving manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an isolation valve according to an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 AA section view.

[0017] In the figure, 1. valve body, 2. valve plate, 3. driven shaft, 4. driving shaft, 5. rolling bearing, 6. driving device, 7. connecting rod, 8. swing arm, 9. sealing ring, 10. valve seat, 11. gasket, 12. guide plate, 13. connecting sleeve, 14. U-shaped channel steel. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1~Figure 2As shown, the utility model provides a one-way isolation valve, including a valve body 1, which is assembled and welded by bending upper and lower frames and side frames, and the minimum structural length of the valve is 150mm; the valve frame is folded outward and fixedly connected with the driving device 6 by bolts through a bracket; the valve plate 2 is respectively connected with the driving shaft 4 and the driven shaft 3 through the pin shaft (the present embodiment adopts a conical pin) on the connecting sleeve 13, and the two ends of the driving shaft 4 and the driven shaft 3 are respectively rotatably connected with the valve body 1 through rolling bearings 5; the output end of the driving device 6 is key-connected with the driving shaft 4, and the driving shaft 4 is key-connected with the swing arm 8 and drives the driven shaft 3 through the connecting rod 7, so as to drive the valve plate 2 to rotate at the same time, so as to realize the opening and closing action of the valve.

[0020] In some embodiments, the rubber sealing ring 9 is installed after the valve seat 10 is welded to the valve body 1. When the valve is closed, the valve plate 2 is in contact with the sealing ring 9 to reduce the leakage inside the valve, thereby realizing the isolation function of the valve to the ventilation system.

[0021] In some embodiments, a guide plate 12 is welded and fixed on one side of the valve seat 10 away from the valve plate 2, wherein the guide plate 12 on the valve seat 10 located in the middle of the valve body 1 is V-shaped; the guide plates 12 on the valve seat 10 located at the top and bottom of the valve body 1 are in a straight line shape, and the guide plates 12, the valve body 1, and the valve seat 10 form a right triangle, and the angle between the guide plates 12 and the valve body 1 is no more than 45 degrees. The purpose of welding the guide plates 12 on the valve seat 10 is to reduce the flow resistance of the valve.

[0022] In some embodiments, a gasket 11 is provided on the right side of the valve plate 2, and a U-shaped channel steel 14 is provided on the right side of the gasket 11. The U-shaped channel steel 14, the gasket 11 and the valve plate 2 are fixedly connected by bolts; the addition of the gasket 11 at the valve plate 2 increases the distance between the sealing surface and the active shaft 4 and the sealing surface and the driven shaft 3, which can leave space for the installation and welding of the conical pin. At the same time, the extended part of the upper end of the valve plate 2 will not interfere with the conical pin. The extension of the upper end of the valve plate 2 can reduce the size of the valve seat 10, thereby reducing the flow resistance to a certain extent. The upper end of the valve plate 2 is bent to the side away from the sealing ring 9 to avoid interference between the valve plate 2 and the sealing ring 9 when opening, and at the same time strengthen the structural strength of the valve plate 2.

[0023] The installation process of the utility model is:

[0024] Weld the valve seat 10 to the inside of the valve body in advance and install the sealing ring 9, place the valve so that the valve seat 10 is in a horizontal state, and connect the U-shaped channel steel 14, the gasket 11 and the valve plate 2 with bolts from top to bottom in sequence; adjust the valve plate 2 and the sealing ring 9 to be pressed tightly; pass the driven shaft 3 and the driving shaft 4 through the connecting sleeve 13 and the valve body 1 respectively and place them on the corresponding valve plate 2, and at this time weld the connecting sleeve 13 and the arc-shaped groove of the U-shaped channel steel 14 on the valve plate 2, and after welding, install the conical pin on the shaft, and spot weld the two ends of the conical pin and the connecting sleeve 13 to fix the driven shaft 3 and the driving shaft 4.

[0025] This assembly process ensures the relative flatness of the valve plate 2 and the valve seat 10, and the operation is smoother; it is easy to adjust the compression amount between the valve plate 2 and the sealing ring 9, reduce the internal leakage of the valve, and improve the processing and assembly efficiency.

[0026] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A one-way isolation valve, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to the driving device (6) by bolts via a bracket; the output end of the driving device (6) is transmission-connected to the driving shaft (4), and the driving shaft (4) is transmission-connected to the driven shaft (3) via a swing arm (8) and a connecting rod (7); both ends of the driving shaft (4) and the driven shaft (3) are rotationally connected to the valve body (1) via rolling bearings (5); the driving shaft (4) is fixedly connected to the upper valve plate (2) via a connecting sleeve (13), and the driven shaft (3) is fixedly connected to the lower valve plate (2) via another connecting sleeve (13); a valve seat (10) is fixedly provided on the inner side of the valve body (1), and when the one-way isolation valve is closed, the valve seat (10) is in close contact with the valve plate (2); the upper end of the valve plate (2) is bent toward a side away from the sealing ring (9).

2. A one-way isolation valve according to claim 1, characterized in that: A backing plate (11) is arranged on the right side of the valve plate (2), and a U-shaped channel steel (14) is arranged on the right side of the backing plate (11); the U-shaped channel steel (14), the backing plate (11) and the valve plate (2) are fixedly connected; and the connecting sleeve (13) is fixed in the arc-shaped groove at the upper end of the U-shaped channel steel (14).

3. A one-way isolation valve according to claim 1, characterized in that: A sealing ring (9) is installed in the valve seat (10); when the one-way isolation valve is closed, the sealing ring (9) in the valve seat (10) is in close contact with the valve plate (2).

4. A one-way isolation valve according to claim 1 or 3, characterized in that: A guide plate (12) is welded and fixed to a side of the valve seat (10) away from the valve plate (2).

5. A one-way isolation valve according to claim 4, characterized in that: The guide plate (12) on the valve seat (10) in the middle of the valve body (1) is V-shaped; the guide plates (12) on the valve seats (10) at the top and bottom of the valve body (1) are I-shaped, and the guide plates (12) and the valve body (1) and the valve seat (10) form a right triangle, and the angle between the guide plates (12) at the top and bottom and the valve body (1) is no more than 45 degrees.

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