Special device for finishing surface of valve rod of nuclear power gate valve

Abstract

The utility model discloses a special device for finishing the surface of a valve rod of a nuclear power gate valve, which comprises ultrasonic surface processing equipment arranged on one side of a three-jaw chuck of a numerical control lathe; the finishing wheel is installed at the working end of the ultrasonic surface machining equipment in a matched mode and corresponds to the workpiece on the three-jaw chuck. The surface roughness detector is arranged on the side wall of the operation area of the numerical control lathe, and the detection end of the surface roughness detector corresponds to the position of the three-jaw chuck; wherein the ultrasonic surface machining equipment start-stop control part is connected with a control cabinet of the numerical control lathe, and the detection data feedback part and the start-stop control part of the surface roughness detector are both connected with the control cabinet of the numerical control lathe. The utility model effectively solves the problems that the size precision and the surface roughness of the valve rod are high and the efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stem processing equipment, and particularly relates to a special device for surface finishing processing of a nuclear power gate valve stem. Background Technique

[0002] A large number of valves are used in nuclear equipment, and the gate valve is one of them. As the main component of the valve, the valve stem is also used in a large quantity.

[0003] In order to ensure the safety of nuclear equipment, the surface roughness requirements for the parts of the valve stem polished rod that need to be sealed with the valve are relatively high: for the valve with packing seal at the valve stem part, the surface roughness of the contact part between the valve stem and the packing should not be greater than Ra0.8 μm; for the valve with O-ring seal at the valve stem part, the surface roughness of the contact part between the valve stem and the O-ring should not be greater than Ra0.4 μm; for the valve with psealing ring seal at the valve stem part, the surface roughness of the contact part between the valve stem and the psealing ring should not be greater than Ra0.2 μm.

[0004] The valve stem part of the nuclear power gate valve usually adopts O-ring seal, and the diameter dimension tolerance zone of the contact part between the valve stem and the O-ring is only 0.130 mm; the cylindricity is not less than the 7th grade accuracy of GB / T1184; the surface roughness should not be greater than Ra0.4 μm.

[0005] However, for the above requirements such as precision and roughness, it is difficult to achieve by conventional machining methods, and the efficiency is low. Content of the Utility Model

[0006] Aiming at the above technical problems, the utility model provides a special device for surface finishing processing of a nuclear power gate valve stem.

[0007] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A special device for surface finishing processing of a nuclear power gate valve stem includes:

[0009] An ultrasonic surface processing device, which is arranged on one side of the three-jaw chuck of a numerical control lathe;

[0010] A finishing wheel, which is installed on the working end of the ultrasonic surface processing device in a matching manner and corresponds to the workpiece on the three-jaw chuck;

[0011] A surface roughness detector, which is arranged on the side wall of the working area of the numerical control lathe, and its detection end corresponds to the position of the three-jaw chuck;

[0012] Among them, the start-stop control part of the ultrasonic surface processing device is connected to the control cabinet of the numerical control lathe, and both the detection data feedback part and the start-stop control part of the surface roughness detector are connected to the control cabinet of the numerical control lathe.

[0013] The sizing wheel is an alloy wheel.

[0014] The ultrasonic surface processing equipment is fixedly installed at the tool rest of the CNC lathe.

[0015] A protective cover that can be opened is arranged outside the surface roughness detector.

[0016] The material of the protective cover is tempered glass.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. By utilizing the cold plasticity characteristics of the workpiece at room temperature and the ultrasonic waves generated by the ultrasonic surface processing equipment, the sizing wheel undergoes high-frequency vibration, performing non-abrasive grinding, strengthening, and micro-deformation treatment on the surface of the workpiece, enabling the surface of the workpiece to meet more ideal surface roughness requirements. At the same time, compressive stress is generated on the surface of the workpiece, improving the microhardness, wear resistance, and corrosion resistance of the workpiece surface and prolonging the fatigue life.

[0019] 2. The present utility model solves the problems of high dimensional accuracy, high surface roughness, and low efficiency of the valve stem. Through the application of precision finishing processing of the nuclear power gate valve stem, it can also be popularized and applied to the processing of other high-precision industrial components.

[0020] 3. The structure of the present utility model is simple, easy to operate, has a low manufacturing cost, stable frequency, precise control, is stable and reliable, can effectively reduce energy consumption, and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the purpose, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0023] Such as Figure 1As shown in the figure, a special device for finishing the surface of the valve stem of a nuclear power gate valve includes: an ultrasonic surface processing device 4, which is arranged on one side of the three-jaw chuck 2 of the numerical control lathe 1; a finishing wheel 6, which is cooperatively installed on the working end of the ultrasonic surface processing device 4 and corresponds to the workpiece 3 on the three-jaw chuck 2; a surface roughness detector 7, which is arranged on the side wall of the working area of the numerical control lathe 1, and its detection end corresponds to the position of the three-jaw chuck 2; wherein, the start-stop control part of the ultrasonic surface processing device 4 is connected to the control cabinet 5 of the numerical control lathe 1, and both the detection data feedback part and the start-stop control part of the surface roughness detector 7 are connected to the control cabinet 5 of the numerical control lathe 1. Among them, the finishing wheel 6 is an alloy wheel, the ultrasonic surface processing device 4 is fixedly installed at the tool rest of the numerical control lathe 1, and a detachable protective cover is arranged outside the surface roughness detector 7, and the material of the protective cover is tempered glass.

[0024] When the present utility model is in use, according to the length of the workpiece 3 to be processed, the positions of the ultrasonic surface processing device 4 and the finishing wheel 6 are adjusted. The numerical control lathe 1 is started, the main shaft rotates, the switch of the control cabinet 5 is turned on, and the oil circuit is opened. The ultrasonic surface processing device 4 starts to work, and the finishing wheel 6 generates high-frequency vibration to perform surface finish processing on the workpiece 3 to be processed. The surface roughness detector 7 continuously detects the surface roughness of the workpiece 3 and sends the detection data to the control cabinet 5 of the numerical control lathe 1. When the surface roughness of the workpiece 3 meets the processing requirements, the control cabinet 5 controls the ultrasonic surface processing device 4 and the numerical control lathe 1 to stop. The processing is completed, the finishing wheel 6 moves away from the workpiece 3, the surface of the workpiece 3 is processed qualified, and the workpiece 3 is taken off to complete the processing.

[0025] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A special device for finishing the surface of the valve stem of a nuclear power gate valve, characterized in that, Including: An ultrasonic surface processing device (4), arranged on one side of the three-jaw chuck (2) of the numerically controlled lathe (1); A finishing wheel (6), fitted and installed on the working end of the ultrasonic surface processing device (4) and corresponding to the workpiece (3) on the three-jaw chuck (2); A surface roughness detector (7), arranged on the side wall of the working area of the numerically controlled lathe (1), and its detection end corresponding to the position of the three-jaw chuck (2); Among them, the start-stop control part of the ultrasonic surface processing device (4) is connected to the control cabinet (5) of the numerically controlled lathe (1), and both the detection data feedback part and the start-stop control part of the surface roughness detector (7) are connected to the control cabinet (5) of the numerically controlled lathe (1).

2. The special device for precision finishing of the surface of the valve stem of a nuclear power gate valve according to claim 1, wherein: The finishing wheel (6) is an alloy wheel.

3. The special device for precision finishing of the surface of the valve stem of a nuclear power gate valve according to claim 1, wherein, The ultrasonic surface processing device (4) is fixedly installed at the tool rest of the numerically controlled lathe (1).

4. The special device for precision finishing of the surface of a nuclear power gate valve stem according to claim 1, wherein, A switchable protective cover is arranged outside the surface roughness detector (7).

5. The special device for precision finishing of the surface of a nuclear power gate valve stem according to claim 4, characterized in that, The material of the protective cover is toughened glass.

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