Simulation knocking platform of nuclear power station loose part monitoring system

Abstract

The invention belongs to the technical field of signal testing, and particularly relates to a simulation knocking platform of a nuclear power station loose part monitoring system. Comprising a base, a guide plate, a slide rail and a test bench, an accelerometer is mounted on the base, the side surface of the base is fixedly connected with the guide plate, the slide rail is mounted on the guide plate, and the test bench is mounted on the slide rail. The slide rail is adjusted to move up and down, the metal balls freely fall onto the base from the four holes of the test bed, the base is impacted by the metal balls, the accelerometer monitors the impact and generates a charge signal to the rear-end processing equipment, and the rear-end processing equipment calculates the impact energy. The device is used for off-line detection of the availability of the pre-charge amplifier and simulation of on-site knocking for testing of the availability of a signal channel.

Description

Technical Field

[0001] The invention belongs to the technical field of signal testing, and in particular relates to a simulation knocking platform of a loose component monitoring system of a nuclear power plant. Background Art

[0002] The charge amplifier used in the loose parts monitoring system of Qinshan No. 1 Nuclear Power Plant is responsible for converting the charge signal from the acceleration sensor into a voltage signal, isolating and amplifying the signal, and sending it to the processing cabinet for processing and analysis. During the operation of the power plant system, the charge amplifier has failed several times, affecting the normal operation of the loose parts monitoring system. Since the charge amplifier is located in the reactor building, a simulated knocking platform is needed to detect spare parts to ensure the availability of spare parts and avoid repeatedly bringing power into the reactor building for maintenance work.

[0003] The loose parts monitoring system of a nuclear power plant is used to monitor whether there are loose parts in the primary circuit. After the system has been running for a certain period of time, the channel availability needs to be tested. Currently, a metal hammer or impactor is used to simulate the knocking of the equipment in the primary circuit. The energy of this knocking impact is not adjustable or the adjustable range is small. In addition, since the acceleration sensor is installed at the lug on the top of the pressure vessel, the main pipeline in the middle of the pressure vessel close to the side of the pressure vessel, the bottom of the pressure vessel, the evaporator and the main pump, the knocking position is difficult to reach and difficult to knock repeatedly. Therefore, a simulated knocking platform is needed to test the signal channel to meet the needs of the noise monitoring system of the pressure vessel and pipeline of the nuclear power plant. Summary of the invention

[0004] The object of the present invention is to provide a simulation knocking platform for a loose component monitoring system of a nuclear power plant, which is used for off-line detection of the availability of a pre-charge amplifier and for testing the availability of a signal channel by simulating on-site knocking.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A simulated knocking platform for a loose component monitoring system of a nuclear power plant comprises a base, a guide plate, a slide rail and a test bench. An accelerometer is installed on the base, a side of the base is connected and fixed to the guide plate, a slide rail is installed on the guide plate, and the test bench is installed on the slide rail.

[0007] The base is a stainless steel plate of 500mm×200mm×10mm.

[0008] The sharp corners around the base are blunted.

[0009] The accelerometer has three mounting holes, and the installation direction of the accelerometer can be adjusted by selecting different mounting holes on the base.

[0010] The guide plate is a stainless steel plate of 460mm×100mm×8mm.

[0011] The guide plate has scale markings for determining the height.

[0012] The slide rail is a stainless steel block of 110mm×60mm×18mm.

[0013] The test bench is a stainless steel plate of 400mm×111mm×3mm.

[0014] Adjust the slide rail to move up and down, and use a metal ball to fall freely from the four holes of the test bench to the base. The base is hit by the metal ball, and the accelerometer monitors the impact and generates a charge signal to the back-end processing equipment, which calculates the energy of the impact.

[0015] The height of the test bench from the base is adjustable between 0 and 40 cm.

[0016] The beneficial effects achieved by the present invention are:

[0017] The present invention provides an offline test platform for the loose parts monitoring system to realize the offline detection of the pre-charge amplifier and the analog signal test of the online response channel of the system cabinet. The present invention can generate different impact energies by adjusting the height of the test bench and the weight of the metal ball. The adjustable energy range is between 0.01J and 10J, simulating the impact signal of loose parts in the pressure vessel, main pipeline, steam generator and other equipment of the nuclear power plant under the impact of fluid, and is used to simulate the response of the channel equipment of the loose parts monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a simulated knocking platform for a loose component monitoring system in a nuclear power plant;

[0019] Figure 2 A diagram of the platform base for simulating knocking for a loose component monitoring system in a nuclear power plant;

[0020] Figure 3 This is a test bench diagram of a simulated knocking platform for a loose component monitoring system in a nuclear power plant;

[0021] Figure 4 A diagram of a platform slide rail that simulates knocking for a loose component monitoring system in a nuclear power plant;

[0022] Figure 5 A diagram of a simulated knocking platform guide plate for a loose component monitoring system in a nuclear power plant;

[0023] In the figure: base 1, guide plate 4, slide rail 3, test bench 2. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, a simulated knocking platform of a loose component monitoring system of a nuclear power plant includes a base 1, a guide plate 4, a slide rail 3, and a test bench 2.

[0026] The base 1 is a 500mm×200mm×10mm stainless steel plate. The sharp corners of the base are passivated. There are 6 M4×0.5 through holes on the surface for installing the accelerometer. The accelerometer has three mounting holes. The installation direction of the accelerometer can be adjusted by selecting different mounting holes on the base. There are 4 M4 screw holes on the side of the base for connection and fixing with the guide plate 4.

[0027] The guide plate 4 is a stainless steel plate of 460 mm×100 mm×8 mm, with scale marks on the scale surface for determining the height, and 4 φ5 through holes are opened at the bottom for connection and fixation with the base 1 .

[0028] The slide rail 3 is a 110mm×60mm×18mm stainless steel block with blunted sharp corners on the surface and 6 M3 screw holes on the bottom for use with the test bench; there are 2 M3 screw holes on the side of the slider, which are connected with knurled flat head screws for easy operation by users.

[0029] Test bench 2 is a stainless steel plate of 400 mm × 111 mm × 3 mm, with four circular holes of 35 mm in diameter on the surface, and the four circular holes are equidistant.

[0030] The accelerometer is installed on the base 1. The slide rail is adjusted to move up and down, and the height of the test bench 2 from the base can be adjusted between 0 and 40 cm. A metal ball is used to fall freely from the four holes of the test bench 2 to the base. The base is hit by the metal ball, and the accelerometer detects the impact and generates a charge signal to the back-end processing device. The back-end processing device can calculate the energy of the impact after calculation. The mass of the metal ball can be replaced as needed.

Claims

1. A simulated knocking platform for a loose component monitoring system of a nuclear power plant, characterized in that: The invention comprises a base, a guide plate, a slide rail and a test bench. An accelerometer is installed on the base. The side of the base is connected and fixed with the guide plate. The guide plate is installed with a slide rail, and the test bench is installed on the slide rail.

2. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1 is characterized by: The base is a stainless steel plate of 500mm×200mm×10mm.

3. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1 is characterized by: The sharp corners around the base are blunted.

4. The simulated knocking platform for the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The accelerometer has three mounting holes, and the installation direction of the accelerometer can be adjusted by selecting different mounting holes on the base.

5. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The guide plate is a stainless steel plate of 460mm×100mm×8mm.

6. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The guide plate has scale markings for determining the height.

7. The simulated knocking platform for the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The slide rail is a stainless steel block of 110mm×60mm×18mm.

8. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The test bench is a stainless steel plate of 400mm×111mm×3mm.

9. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: Adjust the slide rail to move up and down, and use a metal ball to fall freely from the four holes of the test bench to the base. The base is hit by the metal ball, and the accelerometer monitors the impact and generates a charge signal to the back-end processing equipment, which calculates the energy of the impact.

10. The simulated knocking platform of the loose parts monitoring system of a nuclear power plant according to claim 1, characterized in that: The height of the test bench from the base is adjustable between 0 and 40 cm.

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