Nuclear power valve control pneumatic actuating mechanism

Abstract

The utility model discloses a nuclear power valve control pneumatic actuating mechanism, and relates to the technical field of nuclear power valves, the nuclear power valve control pneumatic actuating mechanism comprises a nuclear power valve body, the nuclear power valve body is provided with a protection mechanism convenient for the nuclear power valve body to start and execute, the protection mechanism comprises a bearing disc, a driving motor and an oil storage box, a mounting groove is formed in the upper end of the nuclear power valve body, and the bearing disc is fixedly mounted on the inner side wall of the mounting groove. According to the nuclear power valve, the oil storage box, the oil outlet, the bearing disc and the oil inlet are arranged to be matched, when the threaded rod actually works to drive the valve to be opened and closed, a small amount of oil in the oil storage box permeates into the nuclear power valve body to lubricate the threaded rod, abrasion of the threaded rod is reduced, and the service life of the threaded rod is prolonged; and a certain cooling effect can be achieved on the threaded rod, and the situation that the temperature is too high due to heat generated by friction or other reasons is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power valves, and particularly relates to a pneumatic actuator for controlling nuclear power valves. Background Art

[0002] Nuclear power valves refer to various valves used to control fluid media in nuclear power plants. It plays a crucial role in the safe operation of nuclear power plants. Nuclear power valves can control the flow of radioactive substances, prevent leakage, and ensure the safety of nuclear power plant staff and surrounding residents. In case of an emergency, nuclear power valves can be quickly closed to prevent the further expansion of accidents.

[0003] Currently, the existing nuclear power valve device (such as patent number: CN210566360U) discloses a special nuclear power sodium gate valve. The utility model provides a special nuclear power sodium gate valve, which is designed according to the actual situation of the primary and secondary loops and their auxiliary systems of sodium-cooled fast reactors, has good sealing performance, and is equipped with corresponding heat sinks, and liquid metal sodium can also operate well in it.

[0004] However, in the process of implementing the above technical solution, it is found that there are at least the following technical problems: In the use of existing nuclear power valve bodies, no lubrication mechanism is provided. In the absence of lubrication, the surfaces of the threaded rods rubbing against each other will cause greater wear, affecting the sealing performance of the valves, and the unlubricated threaded rods may have problems such as jamming and leakage, affecting functions such as flow control and pressure regulation of the system. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a pneumatic actuator for controlling nuclear power valves, which solves the technical problems that in the use of existing nuclear power valve bodies, no lubrication mechanism is provided. In the absence of lubrication, the surfaces of the threaded rods rubbing against each other will cause greater wear, affecting the sealing performance of the valves, and the unlubricated threaded rods may have problems such as jamming and leakage, affecting functions such as flow control and pressure regulation of the system.

[0007] (II) Technical Solutions

[0008] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0009] A pneumatic actuator for nuclear power valve control, including a nuclear power valve body, is provided with a protection mechanism on the nuclear power valve body to facilitate the start and execution of the nuclear power valve body. The protection mechanism includes a receiving plate, a driving motor, and an oil storage box. An installation groove is opened at the upper end of the nuclear power valve body, and the receiving plate is fixedly installed on the inner side wall of the installation groove. The driving motor is located at the upper end of the nuclear power valve body, and a threaded rod is fixedly installed at the output end of the driving motor. The oil storage box is fixedly installed at the circumferential end of the threaded rod. A waterproof plate is fixedly installed at the upper end of the receiving plate, and three through holes are opened at the upper end of the receiving plate. A limiting ring is fixedly installed at the circumferential end of the threaded rod, and the limiting ring is located above the oil storage box. The threaded rod is located on the inner side wall of the nuclear power valve body, and the oil storage box is rotatably installed on the inner side wall of the waterproof plate. Three oil outlets are opened at the lower end of the oil storage box, and the sizes of the three oil outlets are adapted to those of the three oil inlets;

[0010] Preferably: The three oil outlets and the three oil inlets are both arranged in an array, and the included angles between the three oil outlets and the three oil inlets are all 120 degrees.

[0011] Preferably: A cover plate is movably sleeved at the upper end of the oil storage box, and a sealing rubber pad is fixedly installed at the lower end of the cover plate.

[0012] (III) Beneficial effects

[0013] 1. By setting the oil storage box, oil outlet, receiving plate and oil inlet in cooperation, when the threaded rod actually works to drive the valve to open and close, a small amount of oil in the oil storage box will seep into the nuclear power valve body to lubricate the threaded rod, reduce the wear of the threaded rod, extend the service life of the screw rod, and can play a certain cooling role for the threaded rod to prevent the temperature from being too high due to friction heat generation or other reasons.

[0014] 2. By fixing the oil storage box on the threaded rod, oil will only be discharged when the oil outlets and oil inlets on the oil storage box coincide, realizing oil discharge in small amounts and multiple times, avoiding excessive oil discharge from affecting the working environment or the normal use of workpieces, and providing an anti-seepage plate and a sealing rubber pad for auxiliary sealing to prevent oil from seeping to other places. Brief description of the drawings

[0015] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following describes the preferred embodiments of the present invention in detail in conjunction with the drawings.

[0016] Figure 1 It is a structural diagram of the nuclear power valve body of the present utility model;

[0017] Figure 2 It is a structural diagram of the oil storage box of the present utility model;

[0018] Figure 3 This is the structural diagram of the practical receiving tray;

[0019] Figure 4 2 is a structural diagram of the practical cover.

[0020] Legend: 1. Nuclear power valve body; 11. Mounting groove; 2. Receiver plate; 21. Oil inlet; 22. Anti-seepage plate; 3. Drive motor; 31. Threaded rod; 32. Limiting ring; 4. Oil storage box; 41. Oil outlet; 42. Cover plate; 43. Sealing rubber pad. DETAILED DESCRIPTION

[0021] The embodiment of the present application provides a nuclear power valve control pneumatic actuator to effectively solve the problem that in the use of the existing nuclear power valve body 1, there is no lubrication mechanism. In the absence of lubrication, the surfaces of the threaded rod 31 that rub against each other will produce greater wear, affecting the sealing performance of the valve, and the unlubricated threaded rod 31 may have problems such as sticking and leakage, affecting the flow control, pressure regulation and other functions of the system. The device is provided with an oil storage box 4, an oil outlet 41, a receiving plate 2 and an oil inlet 21. When the threaded rod 31 actually works to drive the valve to open and close, a small amount of oil in the oil storage box 4 will penetrate into the nuclear power valve body 1 to lubricate the threaded rod 31, thereby reducing the wear of the threaded rod 31, extending the service life of the screw rod, and having a certain cooling effect on the threaded rod 31 to prevent excessive temperature due to frictional heat or other reasons.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4As described above, the technical solution in the embodiment of the present application is to effectively solve the technical problems in the use of the existing nuclear power valve body 1. Without a lubrication mechanism, when the threaded rods 31 rub against each other without lubrication, greater wear will occur on the rubbing surfaces, affecting the sealing performance of the valve. Moreover, the unlubricated threaded rods 31 may experience jamming, leakage, etc., affecting functions such as flow control and pressure regulation of the system. The general idea is as follows: A pneumatic actuator for controlling a nuclear power valve includes a nuclear power valve body 1. A protection mechanism is provided on the nuclear power valve body 1 to facilitate the start and execution of the nuclear power valve body 1. The protection mechanism includes a receiving plate 2, a driving motor 3, and an oil storage box 4. An installation groove 11 is formed at the upper end of the nuclear power valve body 1. The receiving plate 2 is fixedly installed on the inner side wall of the installation groove 11. The driving motor 3 is located at the upper end of the nuclear power valve body 1. The output end of the driving motor 3 is fixedly installed with a threaded rod 31. The oil storage box 4 is fixedly installed at the circumferential end of the threaded rod 31. The threaded rod 31 is driven by the driving motor 3 to rotate, thereby realizing the opening and closing of the valve. When the threaded rod 31 rotates, it will drive the oil storage box 4 to rotate;

[0024] An anti-seepage plate 22 is fixedly installed at the upper end of the receiving plate 2. Three through holes are formed in the upper end of the receiving plate 2 for the anti-seepage plate 22. A limiting ring 32 is fixedly installed at the circumferential end of the threaded rod 31. The limiting ring 32 is located above the oil storage box 4. The threaded rod 31 is located on the inner side wall of the nuclear power valve body 1. The oil plays a role in lubricating and cooling the threaded rod 31 when the threaded rod 31 rotates. Moreover, the oil outlet 41 on the oil storage box 4 is small and only three are distributed. When it rotates driven by the threaded rod 31 and the oil outlet 41 coincides with the oil inlet 21, oil will flow out, making the oil output per time less and the oil output in small amounts and multiple times, avoiding excessive oil output and affecting the use of the nuclear power valve body 1;

[0025] The oil storage box 4 is rotatably installed on the inner side wall of the anti-seepage plate 22. Three oil outlets 41 are formed through the lower end of the oil storage box 4. The three oil outlets 41 are adapted in size to the three oil inlets 21. The three oil outlets 41 and the three oil inlets 21 are both arranged in an array. The included angles between the three oil outlets 41 and the three oil inlets 21 are all 120 degrees. A certain amount of oil is stored in the oil storage box 4. When the oil storage box 4 rotates to make the oil inlet 21 on the oil outlet 41 coincide, the oil in the oil storage box 4 will enter the oil inlet 21. The oil will flow to the threaded rod 31 inside the nuclear power valve body 1 through the oil inlet 21;

[0026] A cover plate 42 is movably sleeved on the upper end of the oil storage box 4. A sealing rubber pad 43 is fixedly installed at the lower end of the cover plate 42. The anti-seepage plate 22 and the sealing rubber pad 43 are provided for auxiliary sealing to prevent oil from seeping to other places.

[0027] Aiming at the problems existing in the prior art, the utility model provides a pneumatic actuator for nuclear power valve control. By setting up an oil storage box 4, an oil outlet 41, a receiving tray 2 and an oil inlet 21 in cooperation, when the threaded rod 31 actually works to drive the valve to open and close, a small amount of oil in the oil storage box 4 will seep into the nuclear power valve body 1 to lubricate the threaded rod 31, reduce the wear of the threaded rod 31, extend the service life of the screw rod, and can play a certain role in cooling the threaded rod 31 to prevent the temperature from being too high due to heat generated by friction or other reasons.

[0028] Working principle:

[0029] In the use of the nuclear power valve body 1, the housing is made of high-strength ductile iron and has a gantry structure. The pneumatic drive system and accessories are fixed on the gantry, making the structural rigidity more reliable and ensuring the overall seismic performance. Also, due to the relatively high radioactivity and a certain radiation dose in the environmental medium, the actuator adopts a gantry structure and is provided with an anti-toppling structure. A device in the form of a positive acting force and a reactive force is set in the actuator diaphragm chamber. When the spring of the pneumatic actuator tilts, it prevents the spring from tilting and avoids the spring from toppling in the diaphragm chamber, thus avoiding the occurrence of major problems. During actual use, the drive motor 3 drives the threaded rod 31 to rotate, thereby realizing the opening and closing of the valve. When the threaded rod 31 rotates, it drives the oil storage box 4 to rotate. The oil storage box 4 stores a certain amount of oil. When the oil inlet 21 on the oil outlet 41 of the oil storage box 4 coincides, the oil in the oil storage box 4 will enter the oil inlet 21. The oil flows through the oil inlet 21 and reaches the threaded rod 31 in the nuclear power valve body 1. When the threaded rod 31 rotates, it plays a role in lubricating and cooling the threaded rod 31. Moreover, the oil outlet 41 on the oil storage box 4 is small and only three are distributed. Its rotation driven by the threaded rod 31 causes the oil outlet 41 and the oil inlet 21 to coincide before oil is discharged, resulting in a small amount of oil discharged each time and discharging in small amounts multiple times, avoiding excessive oil discharge and affecting the use of the nuclear power valve body 1. In the existing use of the nuclear power valve body 1, no lubrication mechanism is provided. Without lubrication, the surfaces of the threaded rods 31 rubbing against each other will cause greater wear, affecting the sealing performance of the valve. Also, the unlubricated threaded rods 31 may have problems such as jamming and leakage, affecting functions such as flow control and pressure regulation of the system. If lubrication is carried out manually, there are certain safety risks and it is relatively labor-consuming. This device is provided with an oil storage box 4, an oil outlet 41, a receiving plate 2, and an oil inlet 21 in cooperation. When the threaded rod 31 actually drives the valve to open and close during work, a small amount of the oil in the oil storage box 4 will seep into the nuclear power valve body 1 to lubricate the threaded rod 31, reducing the wear of the threaded rod 31 and extending the service life of the lead screw. Also, it can play a certain role in cooling the threaded rod 31, preventing the temperature from being too high due to heat generated by friction or other reasons. Moreover, this device fixes the oil storage box 4 on the threaded rod 31, so that oil is only discharged when the oil outlet 41 on the oil storage box 4 coincides with the oil inlet 21, realizing discharging in small amounts multiple times, avoiding excessive oil discharge from affecting the working environment or the normal use of the workpiece, and is provided with an anti-seepage plate 22 and a sealing rubber pad 43 for auxiliary sealing to prevent the oil from seeping to other places.

[0030] Finally, it should be noted that: Obviously, the above embodiments are merely examples given to clearly illustrate the present utility model, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. A pneumatic actuator for controlling nuclear power valves, comprising a nuclear power valve body (1), characterized in that, A protection mechanism for facilitating the start and execution of the nuclear power valve body (1) is provided on the nuclear power valve body (1). Among them, the protection mechanism includes a receiving plate (2), a driving motor (3), and an oil storage box (4). An installation groove (11) is formed at the upper end of the nuclear power valve body (1). The receiving plate (2) is fixedly installed on the inner side wall of the installation groove (11). The driving motor (3) is located at the upper end of the nuclear power valve body (1). A threaded rod (31) is fixedly installed at the output end of the driving motor (3). The oil storage box (4) is fixedly installed at the circumferential end of the threaded rod (31).

2. The pneumatic actuator for controlling a nuclear power valve according to claim 1, wherein: An anti-seepage plate (22) is fixedly installed at the upper end of the receiving plate (2). Three anti-seepage plates (22) are formed through the upper end of the receiving plate (2).

3. The pneumatic actuator for controlling a nuclear power valve according to claim 2, wherein: A limit ring (32) is fixedly installed at the circumferential end of the threaded rod (31). The limit ring (32) is located above the oil storage box (4).

4. The pneumatic actuator for controlling a nuclear power valve according to claim 3, characterized in that: The threaded rod (31) is located on the inner side wall of the nuclear power valve body (1).

5. The pneumatic actuator for controlling a nuclear power valve according to claim 4, characterized in that: The oil storage box (4) is rotatably installed on the inner side wall of the anti-seepage plate (22). Among them, three oil outlets (41) are formed through the lower end of the oil storage box (4).

6. The pneumatic actuator for controlling a nuclear power valve according to claim 5, characterized in that: The sizes of the three oil outlets (41) and the three oil inlets (21) are adapted to each other.

7. The pneumatic actuator for nuclear power valve control according to claim 6, characterized in that: The three oil outlets (41) and the three oil inlets (21) are both arranged in an array. The included angles between the three oil outlets (41) and the three oil inlets (21) are all 120 degrees.

8. The pneumatic actuator for controlling a nuclear power valve according to claim 7, wherein: A cover plate (42) is movably sleeved at the upper end of the oil storage box (4). A sealing rubber pad (43) is fixedly installed at the lower end of the cover plate (42).

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