Valve

Abstract

The utility model relates to the field of nuclear power station automation control, in particular to a valve. The valve comprises a valve rod, a valve stroke display, a valve stroke measuring plate, a valve stroke measuring device and a man-machine interaction terminal, and the valve stroke measuring device is arranged in the valve and comprises a base, a laser displacement sensor, a first communication module and a microprocessor; a laser displacement sensor is arranged on the base, and a first communication module and a microprocessor are arranged in the base; a second communication module and an operation interface are arranged on the man-machine interaction terminal; the valve stroke measuring device is positioned at the lower part of the valve stroke measuring plate; data measured by the laser displacement sensor is processed by the microprocessor, then sent to the first communication module and further transmitted to the man-machine interaction terminal, and long-distance transmission of the data is achieved. The device is convenient for collecting valve stroke data and realizing automatic control, and is high in measurement efficiency and precision.

Description

Technical Field

[0001] The utility model relates to the field of automatic control of nuclear power plants, and particularly to a valve. Background Art

[0002] A large number of valves are installed in various process systems of nuclear power plants. These valves can be divided into two types: those with built-in stroke measurement devices and those without. Valves with built-in stroke measurement devices currently use displacement sensors to feedback the current stroke of the valve to the control system. After the valve with a built-in stroke measurement device is overhauled and reassembled, maintenance personnel need to use a vernier caliper to measure the valve stroke to ensure that the valve stroke remains unchanged before and after installation. The data measured by the vernier caliper is used as the standard data and used to correct the displacement sensor.

[0003] The displacement sensor used in the valve with a built-in stroke measurement device to measure the valve stroke has certain errors, low measurement accuracy, and the measured data does not conform to the redundancy principle of nuclear power plants. Therefore, adding an external valve stroke measurement device helps to improve the credibility of the data and improve the safe operation of nuclear power.

[0004] Due to the harsh working environment of the valve, poor lighting, difficult fixation of the vernier caliper, and the need for manual recording of data, the current time for manually measuring the stroke of 1 valve after maintenance is about 1 hour. The number of valves in nuclear power plants is huge, and a large amount of time is spent on valve stroke measurement during each major overhaul. Valves without built-in stroke measurement devices are installed with valve position switches. Only when the valve is in the fully open or fully closed state, the valve opening can be displayed as 0% or 100%, and thus the current valve stroke can be known. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a valve that facilitates the collection of valve stroke data and realizes automatic control, with high measurement efficiency and accuracy.

[0006] The utility model provides a valve, including: a valve stem, a valve stroke display, a valve stroke measurement plate, a valve stroke measurement device, and a human-machine interaction terminal.

[0007] The valve stroke measurement device is arranged inside the valve and includes a base, a laser displacement sensor, a first communication module, and a microprocessor.

[0008] The laser displacement sensor is arranged on the base, and the first communication module and the microprocessor are arranged inside the base.

[0009] The human-machine interaction terminal is provided with a second communication module and an operation interface.

[0010] The valve stroke measurement device is located below the valve stroke measurement plate.

[0011] The data measured by the laser displacement sensor is processed by the microprocessor and then sent to the first communication module, and further transmitted to the human-computer interaction terminal to achieve long-distance data transmission.

[0012] In a specific embodiment of the present application, the valve stroke measuring device can be permanently fixed on the valve by screws.

[0013] In a specific embodiment of the present application, the valve stroke measuring device is fixed on the valve once by a magnetic attraction device.

[0014] In a specific embodiment of the present application, the measurement accuracy of the laser displacement sensor is 0.01 mm.

[0015] In a specific embodiment of the present application, the laser displacement sensor includes a laser emitting device and a laser receiving device.

[0016] In a specific embodiment of the present application, the laser emitter emits laser light, which is reflected back when it encounters the valve stroke measurement plate. The laser receiving device sends the data to the microprocessor, and the microprocessor calculates the current valve stroke data. The microprocessor sends the valve stroke data to the human-computer interaction terminal through the first communication module, and the human-computer interaction terminal saves the valve stroke data for the maintenance personnel to view.

[0017] In a specific embodiment of the present application, the first communication module and the second communication module use 4G or 5G communication technology for long-distance data transmission.

[0018] Compared with the prior art, the valve of the present utility model can realize continuous measurement and single measurement of the valve stroke, is simple and reliable to install, has a short measurement time, and can analyze the valve stroke data to warn the maintenance personnel of faulty valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It shows the schematic structural diagram of the valve of the present utility model;

[0020] Figure 2 It shows the schematic structural diagram of the valve stroke measuring device;

[0021] Figure 3 It shows the schematic structural diagram of the human-computer interaction terminal;

[0022] In the figure, 1-valve stem, 2-valve stroke display, 3-valve stroke measurement plate, 4-valve stroke measuring device, 5-base, 6-laser displacement sensor, 7-first communication module, 8-microprocessor, 9-human-computer interaction terminal, 10-laser emitter, 11-laser receiving device, 12-second communication module, 13-operation interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To further understand the present utility model, the implementation scheme of the present utility model will be described below in conjunction with embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present utility model, rather than limiting the present utility model.

[0024] An embodiment of the present utility model discloses a valve, as Figures 1 to 3 shown, including: valve stem 1 of the valve, valve stroke display 2, valve stroke measurement plate 3, valve stroke measurement device 4 and human-machine interaction terminal 9.

[0025] The valve stroke measurement device 4 is arranged inside the valve.

[0026] The valve stroke measurement device 4 can be permanently fixed on the valve by screws, and continuous measurement or single measurement can be realized according to the use requirements.

[0027] The valve stroke measurement device 4 can also be singly fixed on the valve by a magnetic attraction device to realize single measurement, and it can be disassembled after the measurement is completed.

[0028] The valve stroke measurement device 4 is located below the valve stroke measurement plate 3.

[0029] The valve stroke measurement device 4 includes a base 5, a laser displacement sensor 6, a first communication module 7, and a microprocessor 8.

[0030] The laser displacement sensor 6 is arranged on the base 5, and the first communication module 7 and the microprocessor 8 are arranged inside the base 5.

[0031] The measurement accuracy of the laser displacement sensor is 0.01 mm, which can meet the accuracy requirements for measuring the stroke of all valves in nuclear power plants.

[0032] The data measured by the laser displacement sensor 6 is processed by the microprocessor 8 and then sent to the first communication module 7, and then transmitted to the human-machine interaction terminal 9 to realize long-distance data transmission.

[0033] Specifically, the laser displacement sensor 6 includes a laser emission device 10 and a laser reception device 11.

[0034] The laser emitter 10 emits laser, the laser is reflected back when it encounters the valve stroke measurement plate 3, the laser reception device 11 sends the data to the microprocessor 8, the microprocessor 8 calculates the current stroke data of the valve, and the microprocessor 8 sends the valve stroke data to the human-machine interaction terminal 9 through the first communication module 7. The human-machine interaction terminal 9 saves the valve stroke data for the convenience of maintenance personnel to view.

[0035] The human-machine interaction terminal 9 is provided with a second communication module 12 and an operation interface 13.

[0036] The first communication module 7 and the second communication module 12 use 4G or 5G communication technology for long-distance data transmission.

[0037] Maintenance personnel can remotely or nearby send measurement commands through the human-computer interaction terminal 9, and the operating device measures the valve stroke.

[0038] The human-computer interaction terminal 9 can be operated by maintenance personnel to perform single measurements. The human-computer interaction terminal can analyze the historical data of the valve, issue a warning for valves with frequent fluctuations, and maintenance personnel can perform preventive maintenance on the valve.

[0039] The valve stroke measuring device 4 has two working modes. The first is single measurement. When the valve stroke measuring plate 3 moves to a certain position, the valve stroke measuring device 4 sends an instruction according to the instruction sent by the maintenance personnel on the human-computer interaction terminal 9. The instruction is processed by the second communication module 12 of the human-computer interaction terminal 9 and sent to the first communication module 7. The laser emitter 10 emits laser light, which is reflected back when it encounters the valve stroke measuring plate 3. The laser receiving device 11 sends the data to the microprocessor 8, and the microprocessor 8 calculates the current valve stroke data. The microprocessor 8 sends the valve stroke data to the human-computer interaction terminal 9 through the first communication module 7, and the human-computer interaction terminal 9 saves the valve stroke data for the convenience of maintenance personnel to view.

[0040] The second is continuous measurement. The valve stroke measuring device 4 sends an instruction according to the instruction sent by the human-computer interaction terminal. The instruction is processed by the second communication module 12 of the human-computer interaction terminal 9 and sent to the first communication module 7. The laser emitter 10 emits laser light, which is reflected back when it encounters the valve stroke measuring plate 3. The laser receiving device 11 sends the data to the microprocessor 8, and the microprocessor 8 calculates the current valve stroke data. The microprocessor 8 sends the valve stroke data to the human-computer interaction terminal 9 through the first communication module 7, and the human-computer interaction terminal 9 saves the valve stroke data and analyzes it based on the valve stroke data within a certain period of time to determine whether there are abnormal fluctuations in the valve.

[0041] The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A valve, comprising: Valve stem, valve stroke display, valve stroke measurement board, characterized in that it also includes: valve stroke measurement device and human-computer interaction terminal, The valve stroke measuring device is arranged in the valve, and includes a base, a laser displacement sensor, a first communication module, and a microprocessor; A laser displacement sensor is arranged on the base, and a first communication module and a microprocessor are arranged inside the base; The human-computer interaction terminal is provided with a second communication module and an operation interface; The valve stroke measuring device is located at the lower part of the valve stroke measuring plate; The data measured by the laser displacement sensor is processed by the microprocessor and sent to the first communication module, and then transmitted to the human-machine interaction terminal to achieve long-distance data transmission.

2. The valve according to claim 1, characterized in that: The valve stroke measuring device can be permanently fixed on the valve by screws.

3. The valve according to claim 1, characterized in that: The valve stroke measuring device is fixed on the valve once by using a magnetic attraction device.

4. The valve according to claim 1, characterized in that: The laser displacement sensor has a measurement accuracy of 0.01 mm.

5. The valve according to claim 1, characterized in that: The laser displacement sensor comprises a laser emitting device and a laser receiving device.

6. The valve according to claim 5, characterized in that The laser emitting device emits a laser, and the laser is reflected back when it encounters the valve stroke measuring plate. The laser receiving device sends the data to the microprocessor, and the microprocessor calculates the current stroke data of the valve. The microprocessor sends the valve stroke data to the human-computer interaction terminal through the first communication module. The human-computer interaction terminal saves the valve stroke data for the convenience of maintenance personnel to view.

7. The valve according to claim 1, characterized in that The first communication module and the second communication module use 4G or 5G communication technology for long-distance data transmission.

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