CN203895130U - Nuclear power plant switch checking device and system - Google Patents

Abstract

The utility model provides a nuclear power plant switch verification device and a verification system. The nuclear power plant switch verification device includes a gas source joint, a fine-tuning valve, a first regulating valve, a standard meter end joint, a second regulating valve, a calibrated end joint, a third regulating valve and a first exhaust pipe. The air source joint passes through the air pipe The air pipe connected with one end of the fine-tuning valve and the other end of the fine-tuning valve is divided into three paths, the first air pipe is connected with one end of the first regulating valve, and the other end of the first regulating valve is connected with the standard gauge end joint , the second air pipe communicates with one end of the second regulating valve, the other end of the second regulating valve communicates with the calibrated end joint, and the third air pipe communicates with one end of the third regulating valve, so The other end of the third regulating valve communicates with the first exhaust pipe. The utility model also provides three other nuclear power plant switch verification devices and three nuclear power plant switch verification systems. The utility model has the advantages of convenient assembly, high reliability and less leakage.

Description

A nuclear power plant switch calibration device and calibration system

technical field

The utility model relates to the verification of the local pressure gauge and the fixed value of the pressure switch in the reactor coolant system of the nuclear power plant, and can also be used for the verification of the fixed value of the pressure switch in the synchronous grid-connected system.

Background technique

In nuclear power plants, on-site pressure gauges and pressure switches are used as supplementary measures for liquid level transmitters to monitor the pressure of gas storage tanks, and the setting and alarm inspection of pressure switches are items required by supervision. In the reactor coolant system, because the local pressure gauge and pressure switch do not have an isolation valve with a calibration port, the calibration work is cumbersome. It is necessary to calibrate the lower set value and the increased set value at the same time, and the calibration is completed. Finally, it is necessary to flush the pressure of the gas storage tank to the required range, so it is necessary to make a special calibration device to meet all the requirements of the calibration work and improve work efficiency.

In addition, the pressure switch of the synchronous grid-connected system has high requirements on the stability of the fixed value and hysteresis, so it also puts forward higher requirements on the performance of the calibration device. The original calibration method is inefficient and has a long construction period.

Utility model content

In order to solve the technical problems that it is difficult for the existing calibration device to calibrate the pressure switch and local pressure gauge in the reactor coolant system, and the original method of calibrating the pressure switch in the synchronous grid-connected system is inefficient, this paper The utility model provides a nuclear power plant switch verification device, which includes a gas source connector, a fine-tuning valve, a first regulating valve, a standard meter end connector, a second regulating valve, a calibrated end connector, a third regulating valve and a first exhaust pipe , the air source joint communicates with one end of the fine-tuning valve through a gas pipe, and the gas pipe connected with the other end of the fine-tuning valve is divided into three routes, the first gas pipe communicates with one end of the first regulating valve, and the second gas pipe communicates with one end of the first regulating valve. The other end of a regulating valve communicates with the standard meter end joint, the second air pipe communicates with one end of the second regulating valve, the other end of the second regulating valve communicates with the calibrated end joint, and the third The road air pipe communicates with one end of the third regulating valve, and the other end of the third regulating valve communicates with the first exhaust pipe.

The utility model also provides a second nuclear power plant switch verification device, which includes a gas source joint, a fine-tuning valve, a first regulating valve, a standard air pressure gauge, a second regulating valve, a terminal joint to be calibrated, a third regulating valve and a first row Air pipe, the air source joint communicates with one end of the fine-tuning valve through the air pipe, and the air pipe connected with the other end of the fine-tuning valve is divided into three routes, the first air pipe communicates with one end of the first regulating valve, so The other end of the first regulating valve communicates with the standard air gauge, the second air pipe communicates with one end of the second regulating valve, and the other end of the second regulating valve communicates with the joint of the calibrated end. The three-way air pipe communicates with one end of the third regulating valve, and the other end of the third regulating valve communicates with the first exhaust pipe.

The utility model also provides a third nuclear power plant switch verification device, which includes a gas cylinder, a fine-tuning valve, a first regulating valve, a standard meter end joint, a second regulating valve, a calibrated end joint, a third regulating valve and a first row Air pipe, the gas cylinder communicates with one end of the fine-tuning valve through the air pipe, and the air pipe connected with the other end of the fine-tuning valve is divided into three routes, the first air pipe communicates with one end of the first regulating valve, the The other end of the first regulating valve communicates with the standard gauge end joint, the second air pipe communicates with one end of the second regulating valve, the other end of the second regulating valve communicates with the calibrated end joint, and the second air pipe communicates with one end of the second regulating valve. The three-way air pipe communicates with one end of the third regulating valve, and the other end of the third regulating valve communicates with the first exhaust pipe.

The utility model also provides a fourth nuclear power plant switch verification device, which includes a gas cylinder, a fine-tuning valve, a first regulating valve, a standard air pressure gauge, a second regulating valve, a connector at the terminal to be calibrated, a third regulating valve and a first exhaust valve. The gas cylinder communicates with one end of the fine-tuning valve through a gas pipe, and the gas pipe connected with the other end of the fine-tuning valve is divided into three routes, the first gas pipe communicates with one end of the first regulating valve, and the second The other end of a regulating valve communicates with the standard air gauge, the second air pipe communicates with one end of the second regulating valve, the other end of the second regulating valve communicates with the terminal joint to be calibrated, and the third air pipe communicates with one end of the second regulating valve. The air pipe communicates with one end of the third regulating valve, and the other end of the third regulating valve communicates with the first exhaust pipe.

Further, the above nuclear power plant switch verification device also includes an on-off valve, and the on-off valve is arranged on the first exhaust pipe;

and / or,

The nuclear power plant switch verification device also includes a safety pressure relief valve and a second exhaust pipe. The air pipe connected to the other end of the fine-tuning valve is also divided into a fourth air pipe, and the fourth air pipe is connected to the safety valve. One end of the pressure relief valve is communicated, and the other end of the safety pressure relief valve is communicated with the second exhaust pipe.

The utility model also provides a nuclear power plant switch verification system, including a pressure switch, a gas storage tank, a liquid level transmitter, a first pair of air exhaust valves, a first exhaust pipe joint, a first valve, a multimeter, a second Valve and any one of the above-mentioned four kinds of nuclear power plant switch verification devices; the gas pipe connected from the gas storage tank is divided into two routes, one route of gas pipe communicates with one end of the first valve, and the first The other end of the valve communicates with the pressure switch, and the other air pipe communicates with one end of the second valve; the air pipe connected from the second valve is divided into two, one air pipe communicates with the liquid level transmitter, and the other air pipe communicates with the liquid level transmitter. One way communicates with one end of the first pair of air exhaust valves, and the end of the air pipe communicated with the other end of the first pair of air exhaust valves is provided with the first exhaust pipe joint; the signal of the pressure switch The output terminal is connected to the signal terminal of the multimeter's special aviation plug for meter calibration; the connector of the calibrated terminal of the nuclear power plant switch calibration device is connected to the first exhaust pipe connector.

The utility model also provides another nuclear power plant switch calibration system, including an on-site pressure gauge, a gas storage tank, a liquid level transmitter, a first pair of air exhaust valves, a first exhaust pipe joint, a first valve, and a multimeter , the second valve and any one of the above four kinds of nuclear power plant switch verification devices; the gas pipe connected from the gas storage tank is divided into two routes, and one route of the gas pipe communicates with one end of the first valve. The other end of the first valve is connected with the local pressure gauge, and the other air pipe is connected with one end of the second valve; The other way is connected with one end of the first pair of air exhaust valves, and the end of the air pipe communicated with the other end of the first pair of air exhaust valves is provided with the first exhaust pipe joint; The calibrated end joint of the nuclear power plant switch verification device is docked with the first exhaust pipe joint.

The utility model also provides a nuclear power plant switch calibration system, including a synchronous grid-connected system pressure switch, a multimeter and any of the above four nuclear power plant switch calibration devices, the multimeter and the synchronous grid-connected system The contacts of the pressure switch are connected, and the pressure switch of the synchronous grid-connected system is connected with the calibrated terminal joint of the switch verification device of the nuclear power plant.

The utility model has the following beneficial effects: the utility model adopts high-performance fine-tuning valves, standard joints and other standard parts for assembly, which is convenient to assemble, has high reliability, and is not easy to leak; the fine-tuning valve is used for adjustment, which reduces the artificially introduced calibration error; combined with the operation requirements of the field equipment, the calibration will not affect the running equipment at the same time; the efficiency of the instrument calibration work is improved, and the accuracy of the instrument calibration is improved; the structure is simple, easy to operate; the integration is high, and it is easy to carry.

Description of drawings

Fig. 1 is the structural representation of the first embodiment of the utility model nuclear power plant switch calibration device;

Fig. 2 is the structural representation of the second embodiment of the utility model nuclear power plant switch calibration device;

Fig. 3 is the structure diagram of the third embodiment of the utility model nuclear power plant switch calibration device;

Fig. 4 is the schematic structural diagram of the fourth embodiment of the utility model nuclear power plant switch calibration device;

Fig. 5 is a schematic structural diagram of an embodiment of a reactor coolant system in a nuclear power plant.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of a first embodiment of a nuclear power plant switch verification device of the present invention. The nuclear power plant switch verification device of the first embodiment includes a gas source connector 1a, a fine-tuning valve 2, a first regulating valve 3, a standard gauge end connector 4a, a second regulating valve 5, a calibrated end connector 6, a third regulating valve 7 and The first exhaust pipe 8, the air source joint 1a communicates with one end of the fine-tuning valve 2 through the air pipe, and the air pipe connected with the other end of the fine-tuning valve 2 is divided into three routes, the first air pipe communicates with one end of the first regulating valve 3, and the second air pipe communicates with one end of the first regulating valve 3 The other end of a regulating valve 3 communicates with the standard surface end joint 4a, the second air pipe communicates with one end of the second regulating valve 5, the other end of the second regulating valve 5 communicates with the calibrated end joint 6, and the third air pipe communicates with One end of the third regulating valve 7 is connected, and the other end of the third regulating valve 7 is connected with the first exhaust pipe 8 .

As shown in FIG. 2 , FIG. 2 is a structural schematic diagram of a second embodiment of a nuclear power plant switch verification device of the present invention. The nuclear power plant switch verification device of the second embodiment includes a gas source joint 1a, a fine-tuning valve 2, a first regulating valve 3, a standard air pressure gauge 4, a second regulating valve 5, a terminal joint 6 to be calibrated, a third regulating valve 7 and a first regulating valve 7. An exhaust pipe 8, the gas source connector 1a communicates with one end of the fine-tuning valve 2 through the air pipe, and the air pipe connected with the other end of the fine-tuning valve 2 is divided into three routes, the first air pipe communicates with one end of the first regulating valve 3, the first The other end of the regulating valve 3 communicates with the standard air gauge 4, the second air pipe communicates with one end of the second regulating valve 5, the other end of the second regulating valve 5 communicates with the calibrated end joint 6, and the third air pipe communicates with the third One end of the regulating valve 7 is communicated, and the other end of the third regulating valve 7 is communicated with the first exhaust pipe 8 .

As shown in FIG. 3 , FIG. 3 is a structural schematic diagram of a third embodiment of a nuclear power plant switch verification device of the present invention. The nuclear power plant switch verification device of the third embodiment includes a gas cylinder 1, a fine-tuning valve 2, a first regulating valve 3, a standard gauge end connector 4a, a second regulating valve 5, a calibrated terminal connector 6, a third regulating valve 7 and a first An exhaust pipe 8, the gas cylinder communicates with one end of the fine-tuning valve 2 through the air pipe, and the air pipe connected with the other end of the fine-tuning valve 2 is divided into three routes, the first air pipe communicates with one end of the first regulating valve 3, and the first regulating valve The other end of 3 communicates with the standard surface end connector 4a, the second air pipe communicates with one end of the second regulating valve 5, the other end of the second regulating valve 5 communicates with the calibrated end joint 6, and the third air pipe communicates with the third regulating valve. One end of the valve 7 is communicated, and the other end of the third regulating valve 7 is communicated with the first exhaust pipe 8 .

As shown in FIG. 4 , FIG. 4 is a structural schematic diagram of a fourth embodiment of a nuclear power plant switch verification device of the present invention. The nuclear power plant switch verification device of the fourth embodiment includes a gas cylinder 1, a fine-tuning valve 2, a first regulating valve 3, a standard air pressure gauge 4, a second regulating valve 5, a terminal joint 6 to be calibrated, a third regulating valve 7 and a first Exhaust pipe 8, the gas cylinder 1 communicates with one end of the fine-tuning valve 2 through the gas pipe, and the gas pipe connected with the other end of the fine-tuning valve 2 is divided into three routes, the first road gas pipe is connected with the first regulating valve 3 One end of the first regulating valve 3 communicates with the standard air pressure gauge 4, the second air pipe communicates with one end of the second regulating valve 5, and the other end of the second regulating valve 5 One end communicates with the calibrated end joint 6 , the third air pipe communicates with one end of the third regulating valve 7 , and the other end of the third regulating valve 7 communicates with the first exhaust pipe 8 .

The gas source connector 1 a of the first embodiment and the second embodiment is used for connecting with the gas source cylinder 1 , and the standard gauge end connector 4 a of the first embodiment and the third embodiment is used for connecting with the standard barometer 4 . The gas source connector 1a, the standard meter end connector 4a and the calibrated end connector 6 are all quick connectors.

Preferably, in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, the nuclear power plant switch verification device also includes an on-off valve 9 arranged on the first exhaust pipe 8, further To prevent leakage, it is a redundant design to ensure safety and reliability; the nuclear power plant switch verification device also includes a safety pressure relief valve 10 and a second exhaust pipe 11, and the air pipe connected to the other end of the fine-tuning valve 2 is also separated The fourth air pipe, the fourth air pipe communicates with one end of the safety pressure relief valve 10, and the other end of the safety pressure relief valve 10 communicates with the second exhaust pipe 11. The purpose of this design is for safety considerations. After the overpressure in the test device, the safety relief valve 10 acts to release the pressure.

The nuclear power plant switch verification device of above-mentioned four embodiments can be respectively used in the verification of pressure switch and local pressure gauge in nuclear power plant reactor coolant system, as shown in Figure 5, reactor coolant system comprises local pressure gauge 21, Pressure switch 22, gas storage tank 23, liquid level transmitter 24, first pair of air exhaust valve 25, second pair of air exhaust valve 26, first exhaust pipe joint 27, second exhaust pipe joint 28, The first valve 29, the second valve 30 and the third valve 31; the trachea connected from the gas storage tank 23 is divided into two routes, the one-way trachea communicates with one end of the first valve 29, and the other end of the first valve 29 is connected to the pressure respectively. The switch 22 is communicated with the local pressure gauge 21, and the other air pipe is divided into two routes, one of which communicates with one end of the second valve 30, and the other communicates with one end of the third valve 31; The air pipe out is divided into two paths, one path is connected with one end of the liquid level transmitter 24, the other path is connected with one end of the first pair of air exhaust valves 25, and the other end of the first pair of air exhaust valves 25 is communicated. The end of the gas pipe is provided with a first exhaust pipe joint 27; the gas pipe connected from the other end of the third valve 31 is divided into two routes, one route of the gas pipe communicates with the other end of the liquid level transmitter 24, and the other route communicates with the second pair of One end of the air exhaust valve 26 communicates, and the end of the air pipe communicated with the other end of the second pair of air exhaust valves 26 is provided with a second exhaust pipe connector 28 .

The signal output terminal of the pressure switch 22 is connected to the signal end of the special aviation plug for meter calibration of the multimeter (not shown in Figure 5); The trachea joint 28 is butted. The first pair of air exhaust valves 25, the first exhaust pipe connector 27, the second pair of air exhaust valves 26, and the second exhaust pipe connector 28 belong to the low-pressure and high-pressure circuits respectively, and any one of them can be operated during the verification process. Yes (the premise is that the second valve 29 and the third valve 30 cannot be operated. If these two valves are operated, one side of the liquid level transmitter 24 will be pressurized, which will affect the function of the liquid level transmitter 24). The butt connection between the calibration end joint 6 and the first exhaust pipe joint 27 will be described as an example.

The verification process of the pressure switch 22 and the local pressure gauge 21 is as follows: confirm that the first pair of air exhaust valves 25 and the second pair of air exhaust valves 26 of the air storage tank 23 are closed; pull out the signal of the pressure switch 22 Output connection terminal, connect the special aviation plug signal cable for meter calibration of the multimeter to the signal output terminal of the pressure switch, the action signal of the multimeter will reflect the action of the pressure switch 22; close all valves of the switch calibration device of the nuclear power plant, and confirm that the gas cylinder 1. The standard barometer 4 has been connected to the nuclear power plant switch calibration device; unscrew the first exhaust pipe joint 27, and connect the calibrated end joint 6 of the nuclear power plant switch calibration device to the first exhaust pipe with a pressure-resistant hose. The joint 27 is connected; open the first regulating valve 3 connected with the standard air pressure gauge 4, and then slowly open the outlet valve of the gas cylinder 1 (which contains compressed air) and the fine-tuning valve 2, when the value of the standard air pressure gauge 4 reaches 20bar (this The value is set according to the drop protection setting value of the pressure switch 18.4bar), close the outlet valve of the compressed air cylinder 1; open the second regulating valve 5 at the calibrated end of the calibration device, and open With the first pair of air exhaust valves 25 connected, the air pressure in the air storage tank 23 (the normal working pressure of the air storage tank is 25bar) is higher than the air pressure in the calibration device, and the air flows from the air storage tank 23 to the calibration device. Finally, the air pressure in the gas storage tank 23 and the calibration device are balanced. Since the gas space inside the calibration device is relatively small compared to the gas space of the gas storage tank 23, the final air pressure inside the two is almost 25 bar; Open the on-off valve 9 and the third regulating valve 7 on the first exhaust pipe 8 of the calibration device to gradually reduce the internal air pressure. When the multimeter sends out an action signal (that is, the pressure switch sends out an action signal), read the current standard The value of the barometer, the reading is the drop set value of the pressure switch 22; in the process of the gradual decline of the internal air pressure, it is compared with the standard barometer 4, and the local pressure gauge 21 is checked; the pressure switch 22 After the verification of the local pressure gauge 21 is completed, the on-off valve 9 and the third regulating valve 7 of the verification device are quickly closed.

After that, slowly open the outlet valve of the compressed air cylinder 1, and adjust the fine-tuning valve 2, so that the internal air pressure rises. When the multimeter sends out an action signal, read the value of the standard barometer at that time, and the reading is the rise of the pressure switch 22. Set value; in the process of rising internal air pressure, compare it with the standard barometer 4, and check the local pressure gauge 21; after the calibration of the pressure switch 22 and the local pressure gauge 21 is completed, close the gas cylinder outlet valve.

If it is verified that the rising set value or falling set value of the pressure switch 22 exceeds the allowable error range, then the set value of the pressure switch 22 needs to be adjusted, and then the above checking process is repeated.

After all the calibration is completed, slowly open the outlet valve of the gas cylinder 1, monitor the pressure indication of the standard barometer 4 and the local pressure gauge 21 of the gas storage tank 23, when the pressure reaches 25bar (the air pressure value when the gas storage tank is working normally) Close the gas outlet valve of gas cylinder 1, then close the first pair of air exhaust valves 25 of the gas storage tank 23 connected to the connected end joint 6. Then, open the on-off valve 9 on the first exhaust pipe 8 of the verification device, and slowly open the third regulating valve 7 to discharge the air in the verification device. Finally, the pressure-resistant hose connected to the first exhaust pipe joint 27 of the gas storage tank 23 is removed.

The verification devices of the above four embodiments can also be used to verify the pressure switches in the synchronous grid-connected system in nuclear power plants respectively. The verification process is as follows: close all valves of the verification device, confirm that the gas source gas cylinder 1, the standard air pressure Connect Table 4 to the verification device, connect the pressure switch of the synchronous grid-connected system with the joint 6 of the calibrated terminal, connect the multimeter to the contact of the pressure switch of the synchronous grid-connected system, and the action signal of the multimeter reflects the pressure switch of the synchronous grid-connected system Open the second regulating valve 5 and the first regulating valve 3, adjust the fine-tuning valve 2 slowly, observe the pressure value of the standard air pressure gauge 4 rises, when the multimeter sends out an action signal, immediately close the fine-tuning valve 2, and read the standard air pressure at that time The value in Table 4, the reading is the action pressure value of the pressure switch of the synchronous grid-connected system. Then, open the on-off valve 9 on the first exhaust pipe 8, slowly open the third regulating valve 7 to exhaust, observe that the pressure value of the standard air gauge 4 drops, and close the third regulating valve 7 immediately when the multimeter sends an action signal And the on-off valve 9, read the value of the standard barometer 4 at that time, this reading is the reset pressure value of the pressure switch of the synchronous grid-connected system.

The above is a further detailed description of the utility model in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deductions or replacements can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (10)

1. a nuclear power station switch calibration equipment, it is characterized in that: comprise gas source connector (1a), micrometering valve (2), the first variable valve (3), standard scale end connector (4a), the second variable valve (5), by school end connector (6), the 3rd variable valve (7) and downtake pipe (8), described gas source connector (1a) is communicated with one end of described micrometering valve (2) by tracheae, the tracheae being communicated with described micrometering valve (2) other end is divided into three tunnels, first via tracheae is communicated with one end of described the first variable valve (3), the other end of described the first variable valve (3) is communicated with described standard scale end connector (4a), the second road tracheae is communicated with one end of described the second variable valve (5), the other end of described the second variable valve (5) is communicated with by school end connector (6) with described, Third Road tracheae is communicated with one end of described the 3rd variable valve (7), the other end of described the 3rd variable valve (7) is communicated with described downtake pipe (8).

2. nuclear power station switch calibration equipment according to claim 1, is characterized in that:

Described nuclear power station switch calibration equipment also comprises on-off valve (9), and described on-off valve (9) is located on described downtake pipe (8);

And/or,

Described nuclear power station switch calibration equipment also comprises safety relief valve (10) and second exhaust pipe (11), the tracheae that described and described micrometering valve (2) other end is communicated with also separates Si road tracheae, described Si road tracheae is communicated with one end of described safety relief valve (10), and the other end of described safety relief valve (10) is communicated with described second exhaust pipe (11).

3. a nuclear power station switch calibration equipment, it is characterized in that: comprise gas source connector (1a), micrometering valve (2), the first variable valve (3), normal barometer (4), the second variable valve (5), by school end connector (6), the 3rd variable valve (7) and downtake pipe (8), described gas source connector (1a) is communicated with one end of described micrometering valve (2) by tracheae, the tracheae being communicated with described micrometering valve (2) other end is divided into three tunnels, first via tracheae is communicated with one end of described the first variable valve (3), the other end of described the first variable valve (3) is communicated with described normal barometer (4), the second road tracheae is communicated with one end of described the second variable valve (5), the other end of described the second variable valve (5) is communicated with by school end connector (6) with described, Third Road tracheae is communicated with one end of described the 3rd variable valve (7), the other end of described the 3rd variable valve (7) is communicated with described downtake pipe (8).

4. nuclear power station switch calibration equipment according to claim 3, is characterized in that:

Described nuclear power station switch calibration equipment also comprises on-off valve (9), and described on-off valve (9) is located on described downtake pipe (8);

And/or,

Described nuclear power station switch calibration equipment also comprises safety relief valve (10) and second exhaust pipe (11), the tracheae that described and described micrometering valve (2) other end is communicated with also separates Si road tracheae, described Si road tracheae is communicated with one end of described safety relief valve (10), and the other end of described safety relief valve (10) is communicated with described second exhaust pipe (11).

5. a nuclear power station switch calibration equipment, it is characterized in that: comprise gas cylinder (1), micrometering valve (2), the first variable valve (3), standard scale end connector (4a), the second variable valve (5), by school end connector (6), the 3rd variable valve (7) and downtake pipe (8), described gas cylinder (1) is communicated with one end of described micrometering valve (2) by tracheae, the tracheae being communicated with described micrometering valve (2) other end is divided into three tunnels, first via tracheae is communicated with one end of described the first variable valve (3), the other end of described the first variable valve (3) is communicated with described standard scale end connector (4a), the second road tracheae is communicated with one end of described the second variable valve (5), the other end of described the second variable valve (5) is communicated with by school end connector (6) with described, Third Road tracheae is communicated with one end of described the 3rd variable valve (7), the other end of described the 3rd variable valve (7) is communicated with described downtake pipe (8).

6. a nuclear power station switch calibration equipment, it is characterized in that: comprise gas cylinder (1), micrometering valve (2), the first variable valve (3), normal barometer (4), the second variable valve (5), by school end connector (6), the 3rd variable valve (7) and downtake pipe (8), described gas cylinder (1) is communicated with one end of described micrometering valve (2) by tracheae, the tracheae being communicated with described micrometering valve (2) other end is divided into three tunnels, first via tracheae is communicated with one end of described the first variable valve (3), the other end of described the first variable valve (3) is communicated with described normal barometer (4), the second road tracheae is communicated with one end of described the second variable valve (5), the other end of described the second variable valve (5) is communicated with by school end connector (6) with described, Third Road tracheae is communicated with one end of described the 3rd variable valve (7), the other end of described the 3rd variable valve (7) is communicated with described downtake pipe (8).

7. nuclear power station switch calibration equipment according to claim 6, is characterized in that:

Described nuclear power station switch calibration equipment also comprises on-off valve (9), and described on-off valve (9) is located on described downtake pipe (8);

And/or,

Described nuclear power station switch calibration equipment also comprises safety relief valve (10) and second exhaust pipe (11), the tracheae that described and described micrometering valve (2) other end is communicated with also separates Si road tracheae, described Si road tracheae is communicated with one end of described safety relief valve (10), and the other end of described safety relief valve (10) is communicated with described second exhaust pipe (11).

8. a nuclear power station switch check system, comprises pressure switch (22), gas-holder (23), fluid level transmitter (24), first pair of empty vent valve (25), downtake pipe joint (27), the first valve (29), multimeter, the second valve (30) and according to the nuclear power station switch calibration equipment described in any one in claim 1-6; The tracheorrhaphy picking out from described gas-holder (23) is made two-way, one road tracheae is communicated with one end of described the first valve (29), the other end of described the first valve (29) is communicated with described pressure switch (22), and another road tracheae is communicated with one end of described the second valve (30); The tracheorrhaphy picking out from described the second valve (30) is made two-way, one road tracheae is communicated with fluid level transmitter (24), another road is communicated with one end of described first pair of empty vent valve (25), and the end of the tracheae being communicated with the other end of described first pair of empty vent valve (25) is provided with described downtake pipe joint (27); The signal output terminal of described pressure switch (22) is connected with the calibration general aviation plug signal end of described multimeter; The described of described nuclear power station switch calibration equipment docked with described downtake pipe joint (27) by school end connector (6).

9. a nuclear power station switch check system, comprises on the spot tensimeter (21), gas-holder (23), fluid level transmitter (24), first pair of empty vent valve (25), downtake pipe joint (27), the first valve (29), multimeter, the second valve (30) and according to the nuclear power station switch calibration equipment described in any one in claim 1-6; The tracheorrhaphy picking out from described gas-holder (23) is made two-way, one road tracheae is communicated with one end of described the first valve (29), the other end of described the first valve (29) is communicated with described tensimeter on the spot (21), and another road tracheae is communicated with one end of described the second valve (30); The tracheorrhaphy picking out from described the second valve (30) is made two-way, one road tracheae is communicated with fluid level transmitter (24), another road is communicated with one end of described first pair of empty vent valve (25), and the end of the tracheae being communicated with the other end of described first pair of empty vent valve (25) is provided with described downtake pipe joint (27); The described of described nuclear power station switch calibration equipment docked with described downtake pipe joint (27) by school end connector (6).

10. a nuclear power station switch check system, comprise synchronous grid-connected system pressure switch, multimeter and according to the nuclear power station switch calibration equipment described in any one in claim 1-6, described multimeter connects with described contact of synchronizeing grid-connected system pressure switch, and described synchronous grid-connected system pressure switch is connected by school end connector (6) with the described of described nuclear power station switch calibration equipment.