Emergency rod falling experimental device for reactor control rod hydraulic driving system

Abstract

The invention provides an emergency rod falling experimental device for a reactor control rod hydraulic driving system, and belongs to the technical field of experimental research of nuclear reactor control rod driving mechanisms. The problem that a control rod of a traditional driving mechanism cannot continuously act is solved. The device comprises a circulating pipeline system, a measuring system, a pressure relief system, a driving system and a control rod, the circulating pipeline system mainly provides driving force for the whole device and completes forced circulation of the whole device, and the measuring system can obtain the working state of the whole driving device in an experiment state and can measure the pressure of the whole driving device. The control rod is arranged in the driving system and connected with the detection device, and when the emergency rod falling experiment device loses power, the pressure relief system starts to work, so that the control rod freely falls into the water tank. The device is mainly used for simulating data parameters of rod falling of the control rod when a power plant is powered off and part of equipment fails.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental research on a control rod driving mechanism of a nuclear reactor, and in particular relates to an emergency rod-dropping experimental device for a hydraulic driving system of a reactor control rod. Background Art

[0002] Nuclear reactor control rods and their drive devices are important equipment in the reactor. They undertake the important tasks of reactor startup, power regulation, shutdown and emergency shutdown in accident conditions. Whether they can work normally is directly related to the safety of the reactor. From the drive mode, they can be divided into mechanical drive, magnetic lifting, motor drive and hydraulic drive. Among them, whether the control rod drive system can complete the rapid rod drop within the specified time under emergency conditions, that is, the rod drop method, is an extremely important assessment indicator. The rod drop method is a commonly used method to measure various reactivity effects in the reactor, but this method requires careful consideration of the spatial effect, otherwise, even a small reactivity will produce a large spatial effect. There are two types of emergency conditions. One is the rapid rod drop under manual operation. At this time, all components are in normal working state. Usually, this condition can meet the requirements; the other is the power outage of the whole plant, all components are in paralysis state, the system loses power, and the control rod drops quickly.

[0003] The control rod drive mechanism in the traditional drive mechanism control rod experimental device is connected to the control rod assembly. By energizing the electromagnetic coil in a certain order, the control rod assembly is inserted and lifted, thereby controlling the average temperature of the core to achieve the purpose of safe reactor startup, reactor power regulation and reactor shutdown. However, the traditional drive mechanism control rod experimental device is prone to problems such as delayed control rod drop, rod jamming and rod ejection, that is, the existing traditional mechanism control rod experimental device cannot ensure the continuous movement of the control rod during the movement process, so it is impossible to obtain accurate data on the time and displacement of the control rod during the falling process. Summary of the invention

[0004] In view of this, the present invention aims to propose an emergency rod drop test device for a reactor control rod hydraulic drive system to solve the problem that the traditional drive mechanism control rod test device cannot continuously move, resulting in the inability to accurately measure the time and displacement data of the emergency rod drop test device when the rod is dropped.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a reactor control rod hydraulic drive system emergency rod drop experimental device, which includes a circulation system, a pressure relief system, a measurement system, a drive system and a control rod, the circulation system includes an inlet circulation pipeline, an outlet circulation pipeline, a variable frequency pump, a three-way steering pneumatic valve, a water storage tank and a stepper motor, the output end of the stepper motor is connected to the input end of the variable frequency pump, the three-way steering pneumatic valve includes a one-way interface, a two-way interface and a three-way interface, one end of the water storage tank is connected to one end of the variable frequency pump through the inlet circulation pipeline, the other end of the variable frequency pump is connected to the one-way interface of the three-way steering pneumatic valve through the inlet circulation pipeline, and the three-way interface of the three-way steering pneumatic valve is connected through The inlet circulation pipeline is connected to the lower part of the driving system, and the other end of the water storage tank is connected to the upper part of the driving system through the outlet circulation pipeline. The pressure relief system includes an inlet pressure relief pipeline and an outlet pressure relief pipeline. The two-way interface of the three-way steering pneumatic valve is connected to the upper part of the driving system through the inlet pressure relief pipeline, and the outlet pressure relief pipeline is connected to the lower part of the driving system. The measuring system is respectively connected to the inlet circulation pipeline, the outlet circulation pipeline and the outlet pressure relief pipeline. The driving system includes a driving cylinder body and a piston assembly. The piston assembly is arranged inside the driving cylinder body, and a through hole is arranged in the center of the piston assembly. The control rod is arranged in the driving cylinder body and connected to the piston assembly. The control rod is connected to the measuring system. .

[0006] Furthermore, the inlet circulation pipeline includes an inlet pipe section, an inlet rising pipe section and an inlet transverse pipe section. One end of the inlet pipe section is connected to the water tank, and the other end is connected to one end of the variable frequency pump. The other end of the variable frequency pump is connected to the inlet transverse pipe section through the inlet rising pipe section. The inlet transverse pipe section is connected to a one-way interface of the three-way steering pneumatic valve and is connected to the lower part of the drive device through the three-way interface of the three-way steering pneumatic valve.

[0007] Furthermore, an inlet section stop valve is arranged on the inlet pipe section.

[0008] Furthermore, the outlet circulation pipeline includes an outlet pipe section and an outlet down-going pipe section, one end of the outlet pipe section is connected to the upper part of the drive system, and the other end is connected to the water tank through the outlet down-going pipe section.

[0009] Furthermore, an outlet stop valve is arranged on the outlet descending pipe section.

[0010] Furthermore, the inlet pressure relief pipeline includes a pressure relief inlet riser and a pressure relief inlet transverse pipe. One end of the pressure relief inlet riser is connected to the two-way interface of the three-way steering pneumatic valve, and the other end is connected to the pressure relief inlet transverse pipe. The other end of the pressure relief inlet transverse pipe is connected to the upper part of the drive system.

[0011] Furthermore, the outlet pressure relief pipeline includes a pressure relief outlet transverse pipe and a pressure relief outlet down pipe, one end of the pressure relief outlet transverse pipe is connected to the drive system, and the other end is connected to the pressure relief outlet down pipe, a pressure relief outlet pneumatic valve is arranged on the pressure relief outlet down pipe, and the pressure relief outlet down pipe is connected to the measurement system.

[0012] Furthermore, the top of the driving cylinder body is connected to the measuring system, the control rod is arranged at the center position inside the driving cylinder body, one side of the driving cylinder body is respectively connected to the pressure relief inlet transverse pipe and the inlet transverse pipe section, and the other side of the driving cylinder body is respectively connected to the outlet pipe section and the pressure relief outlet transverse pipe.

[0013] Furthermore, the measurement system includes an inlet pressure sensor, an inlet electromagnetic flowmeter, an outlet pressure sensor, an outlet electromagnetic flowmeter, a leakage electromagnetic flowmeter, a Hall current sensor and a pull-rope displacement sensor. The inlet pressure sensor is arranged on the inlet rising pipe section, the inlet electromagnetic flowmeter is arranged on the pipeline connecting the three-way interface of the three-way steering pneumatic valve and the driving device, the outlet pressure sensor and the outlet electromagnetic flowmeter are both arranged on the outlet pipe section, the leakage electromagnetic flowmeter is arranged on the pressure relief outlet downcomer, the Hall current sensor is arranged on the top of the driving cylinder body, and the pull-rope displacement sensor is connected to the control rod.

[0014] Furthermore, the circulation pipeline, the inlet pressure relief pipeline and the outlet pressure relief pipeline are all connected through elbows or flanges.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention uses water pressure as the power of the control rod drive system, which has a simple structure, low cost and stable working characteristics compared to the traditional drive mechanism or system;

[0017] 2. The present invention adopts a stepper motor as an action signal controller. The working state of the entire driving system of the emergency rod-dropping device is controlled by whether the stepper motor is powered on or off. When the stepper motor fails, the variable frequency pump stops working. Under the action of the system pressure, it can still maintain a stable state without the occurrence of rod jamming or rod ejection accidents.

[0018] 3. The entire driving system of the emergency rod-dropping device of the present invention has only one continuously moving component, a variable frequency pump, which greatly reduces the number of continuously moving components compared to traditional driving mechanisms or systems, making the entire mechanism or system more secure;

[0019] 4. The present invention can conduct repeated experiments for many times, completely simulating the data parameters of control rod drop when the whole power plant is out of power and some equipment fails;

[0020] 5. The various components of the system of the present invention are connected by flanges, bolts, elbows and other equipment, which is convenient for disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of an emergency rod drop experimental device for a reactor control rod hydraulic drive system according to the present invention.

[0023] Figure 2 This is a rod-drop parameter diagram of an emergency rod-drop experimental device for a reactor control rod hydraulic drive system described in the present invention.

[0024] In the figure:

[0025] 1-1, inlet pipe section; 1-2, inlet section stop valve; 1-3, variable frequency pump; 1-4, inlet rising pipe section; 1-5, inlet lateral pipe section; 1-6, three-way steering pneumatic valve; 1-7, outlet pipe section; 1-8, outlet descending pipe section; 1-9, outlet stop valve; 1-10, water storage tank; 1-11, stepper motor; 2-1, inlet pressure sensor; 2-2, inlet electromagnetic flowmeter; 2-3, outlet pressure sensor; 2-4, outlet electromagnetic flowmeter; 2-5, leakage electromagnetic flowmeter; 2-6, Hall current sensor; 2-7, pull rope displacement sensor; 3-1, pressure relief inlet rising pipe; 3-2, pressure relief inlet lateral pipe; 3-3, pressure relief outlet lateral pipe; 3-4, pressure relief outlet pneumatic valve; 3-5, pressure relief outlet descending pipe; 4-1, drive cylinder body; 4-2, piston assembly; 5, control rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0027] See also Figure 1The present embodiment is described as follows: a reactor control rod hydraulic drive system emergency rod drop experimental device, which includes a circulation system, a pressure relief system, a measurement system, a drive system and a control rod 5. The circulation system mainly provides the driving force of the entire experimental device, completes the forced circulation of the entire experimental device, and is also the pressure-bearing boundary of the entire experimental device. The circulation system includes an inlet circulation pipeline, an outlet circulation pipeline, a variable frequency pump 1-3, a three-way steering pneumatic valve 1-6, a water tank 1-10 and a stepper motor 1-11. The stepper motor 1-11 is a stepper motor 1-12. The output end of the motor 1-11 is connected to the input end of the variable frequency pump 1-3, and the stepper motor 1-11 provides the starting power for the emergency rod drop experimental device. The three-way steering pneumatic valve 1-6 includes a one-way interface, a two-way interface and a three-way interface. One end of the water storage tank 1-10 is connected to one end of the variable frequency pump 1-3 through an inlet circulation pipeline, and the other end of the variable frequency pump 1-3 is connected to a one-way interface of the three-way steering pneumatic valve 1-6 through an inlet circulation pipeline. The three-way interface of the three-way steering pneumatic valve 1-6 is connected to the inlet circulation pipeline. The pipeline is connected to the lower part of the driving system, and the other end of the water storage tank 1-10 is connected to the upper part of the driving system through the outlet circulation pipeline. The pressure relief system includes an inlet pressure relief pipeline and an outlet pressure relief pipeline. The two-way interface of the three-way steering pneumatic valve 1-6 is connected to the upper part of the driving system through the inlet pressure relief pipeline, and the outlet pressure relief pipeline is connected to the lower part of the driving system. The measuring system is respectively connected to the inlet circulation pipeline, the outlet circulation pipeline and the outlet pressure relief pipeline. The driving system includes a driving cylinder body 4-1 and a piston assembly 4-2. The piston assembly 4-2 is arranged inside the driving cylinder body 4-1. The center of the piston assembly 4-2 is provided with a through hole. The through hole arranged in the center of the piston assembly 4-2 is used to ensure the pressure balance inside the driving cylinder body 4-1. The control rod 5 is arranged in the driving cylinder body 4-1 and connected to the piston assembly 4-2. The control rod 5 is connected to the measuring system. The measuring system connected to the control rod 5 is used to measure the displacement and time of the control rod 5 falling. The water storage tank 1-10 is used to simulate a nuclear reactor.

[0028] The circulation system is connected to a one-way interface of the three-way steering pneumatic valve 1-6 from one end of the water tank 1-10 through an inlet circulation pipeline, and the inlet circulation pipeline is connected to one end of the drive system through the three-way interface of the three-way steering pneumatic valve 1-6. The other end of the drive system is connected to the other end of the water tank 1-10 through an outlet circulation pipeline. When the system is operating normally, the one-way interface and the three-way interface of the three-way steering pneumatic valve 1-6 are in an open state, so that the emergency rod drop test device is circulated inside, and the measurement system is responsible for monitoring the pressure and flow in the circulation pipeline. When the stepper motor 1-11 is powered off, the emergency rod-dropping experimental device receives an emergency rod-dropping instruction, the variable frequency pump 1-3 stops working, the circulation pipeline loses pressure, and the pressure relief system starts working, causing the drive system to lose pressure. When the pressure in the drive system is less than the weight of the control rod 5 itself, the control rod 5 falls vertically into the water tank 1-10 under the action of gravity. At the same time, the measuring system connected to the control rod 5 falls together with the control rod 5, and is responsible for measuring the time and displacement of the control rod 5 during the falling process. The water in the water tank 1-10 acts as a buffer for the control rod 5. In the present invention, the driving pressure inside the entire emergency rod-dropping experimental device can be changed by adjusting the frequency of the variable frequency pump 1-3, so as to realize the study of the falling of the control rod 5 by different driving forces.

[0029] The inlet circulation pipeline includes an inlet pipe section 1-1, an inlet rising pipe section 1-4 and an inlet transverse pipe section 1-5. One end of the inlet pipe section 1-1 is connected to the water storage tank 1-10, and the other end is connected to one end of the variable frequency pump 1-3. The other end of the variable frequency pump 1-3 is connected to the inlet transverse pipe section 1-5 through the inlet rising pipe section 1-4. The inlet transverse pipe section 1-5 is connected to a one-way interface of a three-way steering pneumatic valve 1-6 and is connected to the lower part of the drive device through the three-way interface of the three-way steering pneumatic valve 1-6.

[0030] The inlet section stop valve 1-2 is arranged on the inlet pipe section 1-1. The inlet section stop valve 1-2 is in an open state when the emergency rod-dropping experimental device is in normal working state. When the emergency rod-dropping experimental device receives the rod-dropping instruction, the inlet section stop valve 1-2 is closed.

[0031] The outlet circulation pipeline includes an outlet pipe section 1-7 and an outlet descending pipe section 1-8. One end of the outlet pipe section 1-7 is connected to the upper part of the driving system, and the other end is connected to the water storage tank 1-10 through the outlet descending pipe section 1-8.

[0032] The outlet drop pipe section 1-8 is provided with an outlet stop valve 1-9, which is in an open state when the emergency rod-dropping experimental device is in normal working state, and is closed when the emergency rod-dropping experimental device receives a rod-dropping instruction.

[0033] The circulation system is connected to the variable frequency pump 1-3 from one end of the water tank 1-10 through the inlet pipe section 1-1, the variable frequency pump 1-3 is connected to a one-way interface of the three-way steering pneumatic valve 1-6 through the inlet rising pipe section 1-4 and the inlet transverse pipe section 1-5, and is connected to one end of the drive system through the three-way interface of the three-way steering pneumatic valve 1-6. The other end of the drive system is connected to the water tank 1-10 through the outlet pipe section 1-7 and the outlet descending pipe section 1-8, thereby obtaining the circulation system of the entire emergency rod drop test device. A measurement system is arranged on the circulation system to monitor the pressure and flow in the circulation pipeline.

[0034] The inlet pressure relief pipeline includes a pressure relief inlet riser 3-1 and a pressure relief inlet transverse pipe 3-2. One end of the pressure relief inlet riser 3-1 is connected to the two-way interface of the three-way steering pneumatic valve 1-6, and the other end is connected to the pressure relief inlet transverse pipe 3-2. The other end of the pressure relief inlet transverse pipe 3-2 is connected to the upper part of the drive system.

[0035] The outlet pressure relief pipeline includes a pressure relief outlet transverse pipe 3-3 and a pressure relief outlet down pipe 3-5. One end of the pressure relief outlet transverse pipe 3-3 is connected to the drive system, and the other end is connected to the pressure relief outlet down pipe 3-5. A pressure relief outlet pneumatic valve 3-4 is arranged on the pressure relief outlet down pipe 3-5, and the pressure relief outlet down pipe 3-5 is connected to the measuring system.

[0036] When the emergency rod-dropping experimental device receives the rod-dropping instruction, the variable frequency pump 1-3 stops working, the three-way interface of the three-way steering pneumatic valve 1-6 is closed, the two-way interface is opened, and the pressure relief outlet pneumatic valve 3-4 is opened, so that the emergency rod-dropping experimental device stops circulating. At this time, there is still a small amount of pressure in the circulation pipeline. The pressure relief system relieves pressure through the two-way interface of the three-way steering pneumatic valve 1-6, the pressure relief inlet riser 3-1, the pressure relief inlet transverse pipe 3-2, the pressure relief inlet transverse pipe 3-2 and the pressure relief outlet descending pipe 3-5, thereby reducing the pressure in the entire emergency rod-dropping experimental device. When the pressure in the drive system is less than the gravity of the control rod 5, the control rod 5 falls freely into the water tank 1-10 by gravity.

[0037] The top of the driving cylinder body 4-1 is connected to the measuring system, the control rod 5 is arranged at the center position inside the driving cylinder body 4-1, one side of the driving cylinder body 4-1 is respectively connected to the pressure relief inlet transverse pipe 3-2 and the inlet transverse pipe section 1-5, and the other side of the driving cylinder body 4-1 is respectively connected to the outlet pipe section 1-7 and the pressure relief outlet transverse pipe 3-3. The driving system is the main part of the emergency rod drop experimental device. The driving cylinder body 4-1 is made of stainless steel with a thickness of 0.4 mm and a smooth inner wall. The upper and lower ends of the driving cylinder body 4-1 are cold-welded with flanges to ensure the sealing inside the driving cylinder body.

[0038] The measuring system comprises an inlet pressure sensor 2-1, an inlet electromagnetic flowmeter 2-2, an outlet pressure sensor 2-3, an outlet electromagnetic flowmeter 2-4, a leakage electromagnetic flowmeter 2-5, a Hall current sensor 2-6 and a pull rope displacement sensor 2-7. The inlet pressure sensor 2-1 is arranged on the inlet riser section 1-4, and the inlet electromagnetic flowmeter 2-2 is arranged on the pipeline connecting the three-way interface of the three-way steering pneumatic valve 1-6 and the driving device. The inlet pressure sensor 2-1 and the inlet electromagnetic flowmeter 2-2 are mainly used to measure the pressure and flow of the driving system inlet. The outlet pressure sensor 2-3 and the outlet The electromagnetic flowmeters 2-4 are all arranged on the outlet pipe section 1-7. The outlet pressure sensor 2-3 and the outlet electromagnetic flowmeter 2-4 are mainly used to measure the outlet pressure and flow of the drive system. The discharge electromagnetic flowmeter 2-5 is arranged on the pressure relief outlet downcomer 3-5. The Hall current sensor 2-6 is arranged on the top of the drive cylinder body 4-1. The pull-rope displacement sensor 2-7 is connected to the control rod 5. When the control rod 5 falls, the pull-rope displacement sensor 2-7 falls together with the control rod 5 and measures the displacement and time of the falling process of the control rod 5. The measurement system can obtain the working status of the entire emergency rod-dropping device under the experimental state.

[0039] The circulation pipeline, the inlet pressure relief pipeline and the outlet pressure relief pipeline are all connected through elbows or flanges. The elbows and flanges are both made of stainless steel, and the pipelines connected through the elbows and flanges have good sealing properties.

[0040] See also Figure 2 To illustrate this embodiment, the emergency rod drop test device in the present invention can be used for the rod drop experiment of the reactor control rod hydraulic drive system. When the control rod 5 loses power in the whole field, the change law of the displacement of the control rod 5 with time during the falling process is measured. When the control rod speed is v=0, the corresponding displacement of the control rod 5 is s=0mm. By comparing the rod drop formation L=645mm of the control rod 5, it can be known that after the control rod 5 falls into the water storage tank 1-10, the water in the water storage tank 1-10 has a buffering effect on the control rod 5.

[0041] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. An emergency rod drop test device for a reactor control rod hydraulic drive system, characterized in that: It comprises a circulation system, a pressure relief system, a measuring system, a driving system and a control rod (5). The circulation system comprises an inlet circulation pipeline, an outlet circulation pipeline, a variable frequency pump (1-3), a three-way steering pneumatic valve (1-6), a water storage tank (1-10) and a stepping motor (1-11). The output end of the stepping motor (1-11) is connected to the input end of the variable frequency pump (1-3). The three-way steering pneumatic valve (1-6) comprises a one-way interface, a two-way interface and a three-way interface. One end of the water storage tank (1-10) is connected to one end of the variable frequency pump (1-3) through the inlet circulation pipeline. The other end of the variable frequency pump (1-3) is connected to the one-way interface of the three-way steering pneumatic valve (1-6) through the inlet circulation pipeline. The three-way interface of the three-way steering pneumatic valve (1-6) is connected to the lower part of the driving system through the inlet circulation pipeline. The water storage tank (1-10) is connected to the upper part of the driving system through an outlet circulation pipeline, the other end of the water storage tank (1-10) is connected to the upper part of the driving system through an outlet circulation pipeline, the pressure relief system includes an inlet pressure relief pipeline and an outlet pressure relief pipeline, the two-way interface of the three-way steering pneumatic valve (1-6) is connected to the upper part of the driving system through the inlet pressure relief pipeline, the outlet pressure relief pipeline is connected to the lower part of the driving system, the measuring system is connected to the inlet circulation pipeline, the outlet circulation pipeline and the outlet pressure relief pipeline, the driving system includes a driving cylinder body (4-1) and a piston assembly (4-2), the driving cylinder body (4-1) is provided with a piston assembly (4-2), the center of the piston assembly (4-2) is provided with a through hole, the control rod (5) is arranged in the driving cylinder body (4-1) and connected to the piston assembly (4-2), and the control rod (5) is connected to the measuring system.

2. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 1, characterized in that: The inlet circulation pipeline comprises an inlet pipe section (1-1), an inlet rising pipe section (1-4) and an inlet transverse pipe section (1-5); one end of the inlet pipe section (1-1) is connected to a water storage tank (1-10), and the other end is connected to one end of a variable frequency pump (1-3); the other end of the variable frequency pump (1-3) is connected to the inlet transverse pipe section (1-5) via the inlet rising pipe section (1-4); the inlet transverse pipe section (1-5) is connected to a one-way interface of a three-way steering pneumatic valve (1-6) and is connected to the lower part of the driving device via the three-way interface of the three-way steering pneumatic valve (1-6).

3. The reactor control rod hydraulic drive system emergency rod drop experimental device according to claim 2, characterized in that: An inlet section stop valve (1-2) is arranged on the inlet pipe section (1-1).

4. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 2, characterized in that: The outlet circulation pipeline comprises an outlet pipe section (1-7) and an outlet descending pipe section (1-8); one end of the outlet pipe section (1-7) is connected to the upper part of the drive system, and the other end is connected to the water storage tank (1-10) through the outlet descending pipe section (1-8).

5. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 4, characterized in that: An outlet stop valve (1-9) is arranged on the outlet descending pipe section (1-8).

6. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 4, characterized in that: The inlet pressure relief pipeline comprises a pressure relief inlet riser pipe (3-1) and a pressure relief inlet transverse pipe (3-2); one end of the pressure relief inlet riser pipe (3-1) is connected to the two-way interface of the three-way steering pneumatic valve (1-6), and the other end is connected to the pressure relief inlet transverse pipe (3-2); the other end of the pressure relief inlet transverse pipe (3-2) is connected to the upper part of the drive system.

7. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 6, characterized in that: The outlet pressure relief pipeline comprises a pressure relief outlet transverse pipe (3-3) and a pressure relief outlet down pipe (3-5); one end of the pressure relief outlet transverse pipe (3-3) is connected to the drive system, and the other end is connected to the pressure relief outlet down pipe (3-5); a pressure relief outlet pneumatic valve (3-4) is arranged on the pressure relief outlet down pipe (3-5); and the pressure relief outlet down pipe (3-5) is connected to the measurement system.

8. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 7, characterized in that: The top of the driving cylinder body (4-1) is connected to the measuring system, the control rod (5) is arranged at the center position inside the driving cylinder body (4-1), one side of the driving cylinder body (4-1) is respectively connected to the pressure relief inlet transverse pipe (3-2) and the inlet transverse pipe section (1-5), and the other side of the driving cylinder body (4-1) is respectively connected to the outlet pipe section (1-7) and the pressure relief outlet transverse pipe (3-3).

9. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 8, characterized in that: The measuring system comprises an inlet pressure sensor (2-1), an inlet electromagnetic flowmeter (2-2), an outlet pressure sensor (2-3), an outlet electromagnetic flowmeter (2-4), a leakage electromagnetic flowmeter (2-5), a Hall current sensor (2-6) and a pull-rope displacement sensor (2-7); the inlet pressure sensor (2-1) is arranged on an inlet ascending pipe section (1-4); the inlet electromagnetic flowmeter (2-2) is arranged on a pipeline connecting a three-way interface of a three-way steering pneumatic valve (1-6) and a driving device; the outlet pressure sensor (2-3) and the outlet electromagnetic flowmeter (2-4) are both arranged on the outlet pipe section (1-7); the leakage electromagnetic flowmeter (2-5) is arranged on a pressure relief outlet descending pipe (3-5); the Hall current sensor (2-6) is arranged on the top of a driving cylinder body (4-1); and the pull-rope displacement sensor (2-7) is connected to a control rod (5).

10. The reactor control rod hydraulic drive system emergency rod drop test device according to claim 1, characterized in that: The circulation pipeline, the inlet pressure relief pipeline and the outlet pressure relief pipeline are all connected through elbows or flanges.

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