CN211573753U

CN211573753U - Main steam isolating valve pneumatic pump test device

Info

Publication number: CN211573753U
Application number: CN201922032431.7U
Authority: CN
Inventors: 许福南; 刘海峰; 张�浩; 陈兴; 黄专斌; 陈创; 胡瑞
Original assignee: China Nuclear Power Engineering Co Ltd
Current assignee: China Nuclear Power Engineering Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-09-25
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a main steam isolating valve pneumatic pump test device, include: the test bed is characterized by comprising a test bed, a test integrated module and a quick connector, wherein the test bed is fixedly provided with the test integrated module; the test integration module comprises: the oil tank unit is located the air supply unit and the hydraulic unit of oil tank unit top, and the air supply unit includes: the hydraulic oil tank comprises a metal hose, an air source pipe and a pneumatic pump which are sequentially connected, wherein the pneumatic pump is respectively connected with an oil tank unit and a hydraulic unit, and the free end of the metal hose is externally connected with a quick connector. The utility model provides a test device can replace the online maintenance and the detection of main steam isolating valve pneumatic pump, makes pneumatic pump accomplish maintenance and detection under can the line, can simulate the normal operating condition of pneumatic pump under the line to make pneumatic pump work, thereby make accurate judgement to the performance of pneumatic pump.

Description

Main steam isolating valve pneumatic pump test device

Technical Field

The utility model relates to a pneumatic pump test technical field, concretely relates to main steam isolating valve pneumatic pump test device.

Background

The Main Steam Isolation Valve (MSIV) is an important valve in nuclear power plants, and is a nuclear class ii device. The main steam isolation valve is the boundary of the containment and can be automatically and rapidly closed within 5 seconds after receiving an isolation signal. The main steam isolation valve drives the pneumatic pump to act by compressed air, and the pneumatic pump acts to pump hydraulic oil into the pressure cavity, so that the valve is opened. The pneumatic pump stops working, and the pressure oil is discharged to the oil tank to realize the closing of the valve.

During debugging and operation, the pneumatic pump breaks down easily, and the pneumatic pump needs to be disassembled for maintenance after breaking down, and after disassembly for maintenance and reassembly, whether the performance of the pneumatic pump is good or not can not be judged.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model aims to provide a main steam isolating valve pneumatic pump test device can simulate the operating mode of main steam isolating valve to the performance of the pump after new pump, maintenance detects.

In order to achieve the above object, the utility model adopts the following technical scheme:

a main steam isolation valve pneumatic pump test device, comprising: the test bed comprises a test bed, a test bed and a test bed, wherein a test integrated module is fixed on the test bed and externally connected with a quick connector;

the test integration module comprises: the oil tank unit is located air supply unit and the hydraulic unit of oil tank unit top, the air supply unit includes: the pneumatic pump is connected with the oil tank unit and the hydraulic unit respectively, and the free end of the metal hose is connected with the quick coupling externally.

Further, as above, the main steam isolation valve pneumatic pump test device, the air source pipe is sequentially provided with the first pressure gauge, the isolation valve, the pressure reducing valve and the second pressure gauge, the first pressure gauge is connected with the metal hose, and the second pressure gauge is connected with the pneumatic pump.

Further, a main steam isolation valve pneumatic pump test device as described above, said oil tank unit comprising: the oil tank, the upper end both sides of oil tank are equipped with oil filler hole and oil drain port respectively, oil tank upper end middle part is equipped with the inlet pipeline, the inlet pipeline with the pneumatic pump is connected.

Further, a main steam isolation valve pneumatic pump test device as described above, said hydraulic unit comprising: the pressure-bearing tank is internally provided with a hydraulic cavity, and the top of the hydraulic cavity is provided with a third pressure gauge and a safety valve.

Further, according to the main steam isolating valve pneumatic pump test device, the bottom of the hydraulic cavity is connected with the oil inlet pipeline of the oil tank, and the oil return valve is arranged on the pipeline.

Further, according to the main steam isolation valve pneumatic pump test device, the lower portion of the side face of the hydraulic cavity is connected with the pneumatic pump pipeline, and an oil inlet valve is arranged on the pipeline.

Further, according to the main steam isolation valve pneumatic pump testing device, a filter is arranged in the inlet pipeline.

Further, according to the main steam isolation valve pneumatic pump test device, the air source pipe is supported above the oil tank through a support.

Further, according to the main steam isolation valve pneumatic pump testing device, the testing integrated module is fixed on the testing frame through the mounting bolts.

Further, according to the pneumatic pump test device for the main steam isolation valve, the isolation valve is a needle valve.

The beneficial effects of the utility model reside in that: the utility model provides a test device can replace the online maintenance and the detection of main steam isolating valve pneumatic pump, makes pneumatic pump accomplish maintenance and detection under can the line, can simulate the normal operating condition of pneumatic pump under the line to make pneumatic pump work, thereby make accurate judgement to the performance of pneumatic pump.

Drawings

Fig. 1 is a schematic flow chart of a maintenance method of a main steam isolation valve pneumatic pump of a current domestic nuclear power project after a fault occurs, provided in an embodiment of the present invention;

fig. 2 is a schematic flow chart of a method for maintenance using a testing apparatus provided in an embodiment of the present invention;

fig. 3 is a schematic overall structure diagram of a main steam isolation valve pneumatic pump testing device provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the test integration module of FIG. 3;

fig. 5 is a list of conditions of a nuclear power generating unit suitable for the main steam isolation valve pneumatic pump testing device provided in the embodiment of the present invention.

In the drawings: 1. a third pressure gauge; 2. a safety valve; 3. a pressure-bearing tank; 4. an oil return valve; 5. an oil inlet valve; 6. a pneumatic pump; 7. a second pressure gauge; 8. a pressure reducing valve; 9. an isolation valve; 10. a first pressure gauge; 11. an oil tank; 12. a metal hose; 21. a test frame; 22. testing the integrated module; 23, a quick connector; 24. and (6) installing a bolt.

Detailed Description

The present invention will be described in further detail with reference to the drawings and the following detailed description.

The main steam isolation valve is composed of a body, a pneumatic pump loop and a hydraulic loop. The valve is opened, the pneumatic pump works to pump the hydraulic oil into the piston cylinder, and the hydraulic oil jacks up the piston. When the valve is closed, high-pressure oil is discharged to the oil tank through the hydraulic loop.

During the preparation period of nuclear steam flushing of a No. 4 machine of a certain nuclear power plant in China, after a main steam system is warmed, a pneumatic pump of a main steam isolation valve breaks down, and the pneumatic pump is represented by frequent actions (once action within 1-2 minutes) of the pneumatic pump and air leakage at a pump shaft seal position. The field technicians and representative manufacturers judge that the pump body has a fault and the pump needs to be replaced with a new pump, and the nuclear power field has no new pump (other power plants in the same country) and the purchase period of the new pump is about 3-6 months. The nuclear power field only has an old pump which is repaired or replaced by a No. 1 machine (the old pump is disassembled and repaired by a manufacturer, but the performance cannot be determined). The field faces the dilemma that 1, the nuclear power faces the pressure of a first grid-connected node. 2. The severity of the failure of the pneumatic pump of the No. 4 engine is unknown, whether the pneumatic pump can be repaired or not and the maintenance period is uncertain. 3. The performance of the old pump replaced by the No. 1 machine cannot be determined, and the failure to use the pump after the pump is installed can further affect the construction period. The phenomena of pneumatic pump faults occur in the nuclear power machines 1-4, which shows that the frequency of the pneumatic pump faults is relatively high. As shown in fig. 1, a schematic flow chart of a maintenance method after a failure occurs in a main steam isolation valve pneumatic pump of a current domestic nuclear power project. As shown in FIG. 2, the flow chart of the method for maintaining the test device is schematic, and as can be seen from FIG. 2, the step of detaching the valve body again is omitted by using the test device, meanwhile, the maintenance and the test can be carried out in a workshop, and the valve body is installed again after the pump is qualified, so that the trouble of running back and forth in the workshop and the site is avoided, and the time is saved.

The design scheme of the special tool is determined through theoretical research and actual needs, the technical parameters of the special tool are determined through calculation, the special tool is optimized through establishing a model, a modularized special test tool is researched, and the purposes of convenience in carrying and quickness in use are achieved.

As shown in fig. 3-4, a main steam isolation valve pneumatic pump test apparatus includes: the test bed 21, the test bed 21 is fixed with the test integrated module 22, the test integrated module 22 is connected with the quick coupling 23;

the test integration module 22 includes: the oil tank unit is located the air supply unit and the hydraulic unit of oil tank unit top, and the air supply unit includes: the device comprises a metal hose 12, an air source pipe and a pneumatic pump 6 serving as a tested object, wherein the metal hose 12, the air source pipe and the pneumatic pump 6 are sequentially connected, the pneumatic pump 6 is respectively connected with an oil tank unit and a hydraulic unit, and the free end of the metal hose 12 is externally connected with a quick coupling 23.

The air source pipe is sequentially provided with a first pressure gauge 10, an isolating valve 9, a pressure reducing valve 8 and a second pressure gauge 7, the first pressure gauge 10 is connected with a metal hose 12, and the second pressure gauge 7 is connected with a pneumatic pump.

The oil tank unit includes: oil tank 11, the upper end both sides of oil tank 11 are equipped with oil filler hole and oil drain port respectively, and 11 upper ends middle parts of oil tank are equipped with the inlet pipeline, and the inlet pipeline is connected with the pneumatic pump.

The hydraulic unit includes: pressure-bearing jar 3 is equipped with the hydraulic pressure chamber in the pressure-bearing jar 3, and hydraulic pressure chamber top is equipped with third manometer 1 and relief valve 2.

The bottom of the hydraulic cavity is connected with an oil inlet pipeline of an oil tank 11, and an oil return valve 4 is arranged on the pipeline.

The lower part of the side surface of the hydraulic cavity is connected with a pneumatic pump pipeline, and an oil inlet valve 5 is arranged on the pipeline.

A filter is arranged in the inlet pipeline.

The air supply pipe is supported above the oil tank 11 through a bracket.

The test integrated module 22 is fixed on the test frame 21 by a mounting bolt 24.

The isolation valve 9 is a needle valve.

The third pressure gauge 1 is used for observing the working pressure of the tested pneumatic pump 6; the safety valve 2 is used for releasing pressure after the oil loop is overpressurized; the pressure-bearing tank 3 is used for a hydraulic working cavity and simulating a main steam isolation valve hydraulic cavity; the oil return valve 4 is used for returning the working oil to the oil tank; the oil inlet valve 5 is used for an outlet valve of the pump; the pneumatic pump 6 is used for an object detected by the test device and is a power pump of the main steam isolation valve; the second pressure gauge 7 is used for observing the working pressure of the compressed air of the pneumatic pump 6; the pressure reducing valve 8 is used for adjusting the working pressure of the pneumatic pump 6 so as to achieve the purpose of adjusting the output force of the pneumatic pump 6. The isolation valve 9 is used for isolating the compressed air source; the first pressure gauge 10 is used for observing the working pressure of the upstream (before pressure reduction) of the pneumatic pump 6 and judging whether the compressed air pressure of the upstream (plant or workshop) meets the test condition of the pneumatic pump; the oil tank 11 is used for storing hydraulic oil; the metal hose 12 is used for connecting a compressed air pipeline of a workshop or a factory building.

The test integration module 22 is an integrated device that can be moved as a whole. The integrated device is composed of three parts: (1) and the gas source part consists of a metal hose 12, an isolating valve 9, a second pressure gauge 7 and a pressure reducing valve 8. The metal hose 12 is 10 meters long and is equipped with a quick connector 23 which can be quickly connected to a connector in a repair shop. The whole air source pipe component is supported by the bracket at the upper part of the oil tank. (2) A tank part: the oil tank 11 is normal pressure and is provided with an oil filling port and an oil discharging port, and the oil tank 11 is provided with a window for observing the oil level of the oil tank. The oil tank 11 is internally provided with a filter, and after the pneumatic pump 6 is installed, an inlet pipeline provided with the filter is well connected with the pneumatic pump 6, and a gas source pipe is well connected with the pneumatic pump 6. (3) A hydraulic part: the thickness of a hydraulic cavity in the pressure-bearing tank 3 needs to be calculated, the compressive strength needs to be strictly tested, the design pressure is 1.5 times of the operating oil pressure of the main steam isolation valve, and the volume of the hydraulic cavity needs to be calculated according to the cavity volume of an actual hydraulic oil loop of the valve. And a third pressure gauge 1 is arranged on the hydraulic cavity and used for monitoring the oil pressure of the pneumatic pump 6 after operation so as to judge the condition of the output of the pump. The pneumatic pump 6 is arranged on the integrated device and is communicated with the air source, the oil tank 11 and the hydraulic cavity. The valve oil tank 11 and the hydraulic chamber are made of stainless steel. All of which are identical or similar to the original components of the main steam isolation valve.

The working principle is as follows: after the tested pneumatic pump is installed on the testing device, the quick connector 23 is connected with compressed air in a workshop, the first pressure gauge 10 is observed to judge whether the pressure of the compressed air at the upstream meets the requirement of the pneumatic pump, the isolating valve 9 is opened, the pressure reducing valve 8 is adjusted, the second pressure gauge 7 is observed, and the pressure meets the requirement of the working pressure of the pneumatic pump. After the test pneumatic pump 6 is communicated with compressed air, the test pneumatic pump starts to work, the oil inlet valve 5 is opened, the pneumatic pump pumps oil into the pressure-bearing tank 3, the oil return valve 4 is opened, oil in the hydraulic tank flows back to the oil tank 11, and in the process, whether the working pressure of the oil loop reaches the design pressure or not is judged by observing the third pressure gauge 1. If the third pressure gauge 1 deviates from the design pressure, the output force of the pneumatic pump is adjusted by adjusting the pressure reducing valve 8 so as to check the performance of the pneumatic pump and judge the fault reason. Meanwhile, whether the mechanical action and the sound of the starting pump are normal or not can be observed.

This device can simulate the operating condition of main steam isolating valve, can detect the performance of the pump after new pump, maintenance under the online, specifically includes as follows:

(1) the test device can simulate the operation condition of the main steam isolation valve, so that the performance of the new pump is detected.

The testing device can simulate the requirement of 0-1MPa of compressed air pressure required by the running condition of the main steam isolating valve, and can enable the oil pressure to reach a working condition of 0-35MPa of pressure after the pneumatic pump works. The performance of the pump is judged through analyzing parameters such as sound and oil pressure of the new pump.

(2) The testing device can simulate the operation condition of the main steam isolation valve, so that the performance of the pump after maintenance is detected.

During or after maintenance, the pneumatic pump is placed on the device to operate, and fault reasons are found out or the performance of the device is detected; the performance testing of the new pneumatic pump is performed during the manufacturing process in the manufacturing plant.

(3) The test integrated module (shown in figure 4) has small volume and convenient movement; the steam isolating valve is suitable for being used in a repair shop and on site of a main steam isolating valve.

The device can be quickly connected with a compressed air storage tank or a compressed air system of a workshop through a quick connector. The pneumatic pump can be used for testing by using a self-contained test stand; the hydraulic pressure chamber can also be quickly installed on an overhaul platform in an overhaul workshop and is connected with the oil tank and the hydraulic pressure chamber through a threaded joint.

(4) The test frame is manufactured by welding, and an integrated module of the test device can be rapidly installed and detached as required; the range of a pressure gauge 1 is 0-40Mpa, and the range meets the oil pressure requirements of most nuclear reactor type main steam isolation valves at home and abroad, including AP1000 and Hualong I (see figure 5); the setting value of the safety valve 2 is 35.0 Mpa; the design pressure of the pressure-bearing tank 3 is 40 Mpa; the range of the

pressure gauge

7 and 10 is 0-10 Mpa; the design specification of the oil tank 11 is 400 × 800mm, and the oil tank can accommodate the hydraulic oil storage capacity of the Hualong first-pile type main steam isolating valve.

The pneumatic pump test device for the main steam isolation valve provided by the embodiment of the invention has the following advantages:

(1) the device can replace online maintenance and detection of the pneumatic pump of the main steam isolation valve, so that the pneumatic pump can complete maintenance and detection online, the normal working condition of the pneumatic pump can be simulated online, and the pneumatic pump works, so that the performance of the pneumatic pump can be accurately judged, and the device can be used in a maintenance workshop or on the spot of the main steam isolation valve.

(2) The device can detect the performance of a new pump after leaving a factory, verify whether the function of the new pump meets the operation requirement of the valve, and verify whether the output of the pneumatic pump, the oil pressure sound and the like are normal.

(3) The device is used in the maintenance process, and the fault reason can be found more quickly and accurately.

(4) The performance of the pneumatic pump after maintenance is detected, the function of the pneumatic pump is verified, whether the valve body can be installed again or not is judged, and the time for repeatedly detaching and installing the valve body is saved, so that the maintenance period is shortened.

(5) Make into an integrated module with main steam isolation valve oil tank, hydraulic means, air supply, it is convenient to remove, makes things convenient for the maintenance test work of pneumatic pump, can allocate each other between the project simultaneously, can find the trouble problem of pneumatic pump accurately, shortens debugging, maintenance period.

(6) The device can be connected with a compressed air storage tank or a compressed air system of an inspection workshop through a quick connector, and a power source can be provided for a general inspection workshop.

(7) The device is applicable to the maintenance and the experiment of the main steam isolating valve of nuclear power technologies such as Hualong I, AP1000, M310, CPR1000, EPR1000, CAP1400, CNP series, and also is applicable to the pneumatic pump test and the factory test in the production process of relevant manufacturing plants. The specific applicable project situation is shown in figure 5.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a main steam isolating valve pneumatic pump test device which characterized in that includes: the test bed (21), a test integrated module (22) is fixed on the test bed (21), and the test integrated module (22) is externally connected with a quick connector (23);

the test integration module (22) comprises: the oil tank unit is located air supply unit and the hydraulic unit of oil tank unit top, the air supply unit includes: the pneumatic test device comprises a metal hose (12), an air source pipe and a pneumatic pump (6) as a tested object, wherein the metal hose (12), the air source pipe and the pneumatic pump (6) are sequentially connected, the pneumatic pump (6) is respectively connected with an oil tank unit and a hydraulic unit, and the free end of the metal hose (12) is externally connected with a quick coupling (23).

2. The pneumatic pump test device for the main steam isolation valve according to claim 1, wherein a first pressure gauge (10), an isolation valve (9), a pressure reducing valve (8) and a second pressure gauge (7) are sequentially arranged on the air source pipe, the first pressure gauge (10) is connected with the metal hose (12), and the second pressure gauge (7) is connected with the pneumatic pump.

3. A main vapor isolation valve pneumatic pump test rig as claimed in claim 2, wherein the tank unit comprises: the oil tank (11), the upper end both sides of oil tank (11) are equipped with oil filler hole and oil drain port respectively, oil tank (11) upper end middle part is equipped with the inlet pipeline, the inlet pipeline with the pneumatic pump is connected.

4. A main steam isolation valve pneumatic pump test rig as claimed in claim 3, wherein the hydraulic unit comprises: the pressure-bearing tank (3), be equipped with the hydraulic pressure chamber in the pressure-bearing tank (3), hydraulic pressure chamber top is equipped with third manometer (1) and relief valve (2).

5. The main steam isolating valve pneumatic pump test device according to claim 4, wherein the bottom of the hydraulic chamber is connected with an oil inlet pipeline of the oil tank (11), and an oil return valve (4) is arranged on the pipeline.

6. A main steam isolating valve pneumatic pump test device according to claim 5, characterized in that the lower part of the side surface of the hydraulic chamber is connected with the pneumatic pump pipeline, and the pipeline is provided with an oil inlet valve (5).

7. A main steam isolation valve pneumatic pump test rig as claimed in any of claims 3 to 6, wherein a filter is provided in the inlet pipe.

8. A primary steam isolation valve pneumatic pump test rig according to any one of claims 3-6, wherein the source pipe is supported above the tank (11) by brackets.

9. A main steam isolation valve pneumatic pump test device according to any one of claims 1-6, characterized in that the test integration module (22) is fixed on the test rack (21) through mounting bolts (24).

10. A main steam isolation valve pneumatic pump test unit as claimed in any one of claims 2 to 6, characterised in that the isolation valve (9) is a needle valve.