Metal hose cyclic load test device for nuclear power

Abstract

The invention belongs to the technical field of nuclear power equipment safety testing, and particularly relates to a nuclear power metal hose cyclic load testing device which comprises a positioning frame, a conveying assembly and a driving assembly, the positioning frame is used for installing a metal hose, and the driving assembly is used for carrying out a load test on the metal hose. The conveying assembly is used for injecting and outputting cold water or hot water into and out of the metal hose. According to the device, the hot water circulation loop and the normal-temperature water circulation loop are designed, a load experiment is conducted on the metal hose in combination with the driving assembly, the cold and heat alternation and dynamic stress state of the metal hose in the nuclear power environment can be comprehensively simulated, and therefore the durability and reliability of the metal hose are evaluated more accurately.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power equipment safety testing, and in particular relates to a nuclear power metal hose cyclic load testing device. Background Art

[0002] In the nuclear power industry, metal hoses, as an important part of the connecting pipeline system, undertake the important tasks of conveying fluids, transmitting pressure and withstanding various complex working conditions. Since their working environment often involves extreme conditions such as high temperature, high pressure, strong radiation and frequent temperature changes, the performance stability and durability of metal hoses have become one of the key factors to ensure the safe operation of nuclear power equipment.

[0003] Although existing metal hoses have undergone a series of quality control and performance tests during the design and production process, there is still a lack of special test equipment and test methods for the sudden cooling and heating cycle load conditions unique to the nuclear power field to ensure the safety and reliability of metal hoses for nuclear power.

[0004] Therefore, it is particularly important to develop a test device that can simulate the hot and cold cycle loads experienced by metal hoses in a nuclear power environment. Summary of the invention

[0005] The purpose of the present invention is to provide a cyclic load test device for a metal hose for nuclear power. The device, by designing a hot water circulation loop and a normal temperature water circulation loop and combining a driving component to carry out a load test on the metal hose, can fully simulate the hot and cold alternation and dynamic stress state of the metal hose in a nuclear power environment, thereby more accurately evaluating its durability and reliability.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A nuclear power metal hose cyclic load test device, the device comprises a positioning frame and a conveying assembly. The positioning frame is used for installing the metal hose, the positioning frame is provided with a driving assembly, the driving assembly is used for performing a load test on the metal hose, and the conveying assembly is used for injecting and outputting cold water or hot water into the metal hose.

[0008] The positioning frame includes a receiving groove and a connecting rod arranged on the receiving groove; a clamp is provided on the connecting rod, and the clamp is used to install one end of the metal hose. The receiving groove is located below the clamp, and the receiving groove opens toward the clamp.

[0009] Limit blocks are slidably provided on the relative groove walls of the accommodating groove. After the metal hose is bent in the accommodating groove, the limit blocks are located on the inner side of the metal hose. Linkage blocks are provided on the two limit blocks. A power motor is provided on the accommodating groove. A screw is coaxially provided on the motor shaft of the power motor. The screw is provided with two threads with opposite rotation directions. The two linkage blocks are respectively connected to the screw through two threads.

[0010] The groove wall of the accommodating groove and the outer side wall of the limiting block are coated with a low-friction coating.

[0011] The driving assembly comprises a driving cylinder arranged on the receiving groove, the axis of the driving cylinder is parallel to the central axis of the clamp, a push plate is arranged on the end surface of the driving cylinder piston rod, and the free end of the metal hose is connected to the push plate.

[0012] The push plate is equipped with a displacement sensor for detecting the moving distance of the free end of the metal hose and transmitting the detection information to the controller.

[0013] The push plate is provided with a driving motor, a motor shaft of the driving motor is coaxially provided with a driving gear, a driven gear is rotatably provided on the push plate, the driven gear is meshed with the driving gear, and the driven gear is connected to the free end of the metal hose.

[0014] The conveying assembly includes: a hot water inlet plunger pump, a hot water outlet plunger pump, a normal temperature water inlet plunger pump, a normal temperature water outlet plunger pump, a normal temperature water tank, a hot water tank, a circulating water pipe, a hot water pipe and a normal temperature water pipe; the two inlets at one end of the metal hose close to the clamp are respectively connected to the hot water pipe and the normal temperature water pipe, and the outlet is connected to one end of the circulating water pipe, and the two outlets at the other end of the circulating water pipe are respectively provided with a first return pipe and a second return pipe; the first return pipe, the normal temperature water inlet plunger pump, the third return pipe, the normal temperature water tank, the first outlet pipe, the normal temperature water outlet plunger pump, and the normal temperature water pipe are connected in sequence; the second return pipe, the hot water inlet plunger pump, the fourth return pipe, the hot water tank, the second outlet pipe, the hot water outlet plunger pump, and the hot water pipe are connected in sequence.

[0015] The circulating water pipe is provided with a pressure transmitter and a temperature transmitter respectively, which are used to detect the pressure and temperature of the liquid in the metal hose and transmit the data to the controller.

[0016] The first water return pipe is provided with a normal temperature water inlet valve, the normal temperature water pipe is provided with a normal temperature water outlet valve, the second water return pipe is provided with a hot water inlet valve, and the hot water pipe is provided with a hot water outlet valve.

[0017] The beneficial technical effects of the present invention are:

[0018] 1. The present invention provides a nuclear power metal hose cyclic load test device, which can fully simulate the hot and cold alternation and dynamic stress state of the metal hose in a nuclear power environment by designing a hot water circulation loop and a normal temperature water circulation loop and combining a driving component to carry out a load test on the metal hose, so as to more accurately evaluate its durability and reliability.

[0019] 2. The present invention provides a nuclear power metal hose cyclic load test device, which detects the movement distance of the free end of the metal hose through a displacement sensor and transmits the detection information to a controller, monitors the pressure and temperature of the liquid in the metal hose in real time through a pressure transmitter and a temperature transmitter, and combines a precisely controlled pump and valve system to achieve precise control of the test conditions and ensure the accuracy and repeatability of the test results.

[0020] 3. The present invention provides a nuclear power metal hose cyclic load test device, which prevents the metal hose from excessive bending by setting a limit block, and uses a low-friction coating to reduce wear and friction heat, thereby improving the safety and reliability of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a nuclear power metal hose cyclic load test device provided by the present invention;

[0022] Figure 2 This is a schematic structural diagram of a metal hose placed outside a containing tank in a nuclear power metal hose cyclic load test device provided by the present invention.

[0023] In the figure: 2-positioning frame; 3-driving assembly; 4-conveying assembly; 5-connecting rod; 6-hoop; 7-four-way pipe; 8-hot water inlet plunger pump; 9-hot water outlet plunger pump; 10-normal temperature water inlet plunger pump; 11-normal temperature water outlet plunger pump; 12-normal temperature water tank; 13-hot water tank; 14-circulating water pipe; 15-hot water pipe; 16-normal temperature water pipe; 17-pressure transmitter; 18-temperature transmitter; 19-three-way pipe; 20-first return pipe; 21-first Second water return pipe; 22-normal temperature water inlet valve; 23-third water return pipe; 24-first water outlet pipe; 25-normal temperature water outlet valve; 26-hot water inlet valve; 27-fourth water return pipe; 28-second water outlet pipe; 29-hot water outlet valve; 30-receiving tank; 31-driving cylinder; 32-sliding plate; 33-driving motor; 34-driving gear; 35-driven gear; 36-limiting block; 37-linkage block; 38-power motor; 39-screw rod; 40-metal hose. DETAILED DESCRIPTION

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

[0025] like Figure 1 , Figure 2 As shown, the present invention provides a nuclear power metal hose cyclic load test device, which includes a conveying component 4 and a positioning frame 2. The conveying component 4 is used to inject and output cold water or hot water into the metal hose 40, and the positioning frame 2 is used for installing the metal hose 40. The positioning frame 2 is provided with a driving component 3 for performing a load test on the metal hose 40.

[0026] During the experiment, hot water or cold water is input into the metal hose using the conveying component, and the metal hose is subjected to a load test using the driving component, thereby realizing a sudden cooling and heating cycle load test on the metal hose.

[0027] The positioning frame 2 includes a receiving groove 30 and a connecting rod 5. The connecting rod 5 is vertically arranged on the receiving groove 30. A clamp 6 is provided on the connecting rod 5. The clamp 6 is used to install one end of the metal hose 40. The clamp 6 fixes one end of the metal hose 40 as the fixed end. The receiving groove 30 is located below the clamp 6, and the receiving groove 30 opens toward the clamp 6.

[0028] like Figure 2 As shown, the driving assembly 3 includes a driving cylinder 31 arranged on the accommodating groove 30, the axis of the driving cylinder 31 is parallel to the axis of the connecting rod 5, a push plate 32 is provided on the end surface of the piston rod of the driving cylinder 31, the push plate 32 is arranged close to one side of the accommodating groove 30, a driving motor 33 is provided on the push plate 32, a driving gear 34 is coaxially provided on the motor shaft of the driving motor 33, a driven gear 35 is rotatably provided on the push plate 32, the driven gear 35 is meshed with the driving gear 34, and the driven gear 35 is connected to the free end of the metal hose 40.

[0029] Before conducting the test, the metal hose is installed on the clamp and the push plate respectively, and then the push plate is pushed by the driving cylinder to move, so that the metal hose can be pushed to bend to one side of the receiving groove, so that the two ends of the metal hose are flush. When conducting a linear reciprocating test, the driving cylinder pushes the push plate downward, and the metal hose is bent to the bottom wall of the receiving groove, so that the load test of the metal hose can be realized.

[0030] When conducting a torsion test, keep the two ends of the metal hose flush, use the drive motor to drive the drive gear and the driven gear to rotate, and then drive the metal hose to twist, so as to achieve a torsion test on the metal hose.

[0031] In another specific embodiment, a displacement sensor is installed on the push plate 32 to detect the moving distance of the free end of the metal hose 40 and transmit the detection information to the controller. The pressure transmitter 17 and the temperature transmitter 18 respectively detect the temperature and pressure of the liquid in the metal hose 40 and transmit the data to the controller to ensure the accuracy and real-time nature of the data.

[0032] Limit blocks 36 are slidably provided on the relative groove walls of the accommodating groove 30. After the metal hose 40 is bent in the accommodating groove 30, the limit blocks 36 are located on the inner side of the metal hose 40. Linkage blocks 37 are provided on the two limit blocks 36. A power motor 38 is provided on the accommodating groove 30. A screw rod 39 is coaxially provided on the motor shaft of the power motor 38. The screw rod 39 is provided with two threads with opposite rotation directions. One of the linkage blocks 37 is connected to one of the threads, and the other linkage block 37 is connected to the other thread. The linkage block 37 is connected to the screw rod 39 through the thread.

[0033] After the metal hose is bent into the receiving groove, during the linear reciprocating experiment, the power motor is used to drive the screw to rotate, thereby pushing the limit block to move. The two limit blocks are used to limit the linear movement range of the metal hose to prevent the metal hose from moving out of control.

[0034] In another specific embodiment, the groove wall of the receiving groove 30 and the outer side wall of the limit block 36 are coated with a low friction coating. The use of the low friction coating is conducive to reducing the impact on the experimental results. The low friction coating is specifically a polytetrafluoroethylene coating.

[0035] like Figure 1-2 As shown, the conveying assembly 4 includes a hot water inlet plunger pump 8, a hot water outlet plunger pump 9, a normal temperature water inlet plunger pump 10, a normal temperature water outlet plunger pump 11, a normal temperature water tank 12, a hot water tank 13, a circulating water pipe 14, a hot water pipe 15 and a normal temperature water pipe 16.

[0036] In a specific embodiment, the normal temperature water tank 12 can be connected to an external water source or an external condenser to maintain the normal temperature water tank 12 at room temperature. A heating plate and a temperature transmitter are provided in the hot water tank 13. The water is heated by the heating plate, and the temperature transmitter detects the water temperature. When the water temperature reaches the set temperature, the heating is stopped.

[0037] A cross-tube 7 is provided at one end of the metal hose 40 close to the clamp 6, two inlets of the cross-tube 7 are respectively connected to the hot water pipe 15 and the normal temperature water pipe 16, and the outlet of the cross-tube 7 is connected to the circulating water pipe 14, on which a pressure transmitter 17 and a temperature transmitter 18 are respectively provided, and a three-way pipe 19 is provided at the other end of the circulating water pipe 14, and two outlets of the three-way pipe 19 are respectively provided with a first return water pipe 20 and a second return water pipe 21.

[0038] The other end of the first return water pipe 20 is connected to the normal temperature water inlet plunger pump 10, and a normal temperature water inlet valve 22 is provided on the first return water pipe 20. The water outlet of the normal temperature water inlet plunger pump 10 is connected to the normal temperature water tank 12 via a third return water pipe 23, and the normal temperature water tank 12 is connected to the normal temperature water outlet plunger pump 11 via a first outlet water pipe 24. The water outlet of the normal temperature water outlet plunger pump 11 is connected to the normal temperature water pipe 16, and a normal temperature water outlet valve 25 is provided on the normal temperature water pipe 16.

[0039] The other end of the second water return pipe 21 is connected to the hot water inlet plunger pump 8, and a hot water inlet valve 26 is provided on the second water return pipe 21. The water outlet of the hot water inlet plunger pump 8 is connected to the hot water tank 13 via a fourth water return pipe 27, and the hot water tank 13 is connected to the hot water outlet plunger pump 9 via a second water outlet pipe 28. The water outlet of the hot water outlet plunger pump 9 is connected to the hot water pipe 15, and a hot water outlet valve 29 is provided on the hot water pipe 15.

[0040] During the test, the hot water inlet valve and the hot water outlet valve are opened, and the hot water circulation loop starts to work. When the temperature of the temperature transmitter at the outlet of the metal hose reaches the working temperature of the metal hose, the hot water circulation loop works for one minute, and the hot water inlet valve is closed and the hot water inlet plunger pump is closed. After the hot water outlet plunger pump raises the internal pressure of the metal hose to the design pressure of the metal hose, the hot water outlet valve is closed, and the drive component starts to work, and the metal hose is tested. After the test, the normal temperature water inlet valve and the normal temperature water outlet valve are opened, and the normal temperature water circulation loop starts to work. When the temperature transmitter reading reaches room temperature, the normal temperature water circulation loop works for one minute, and the normal temperature water inlet valve is closed and the normal temperature water inlet plunger pump is closed. After the normal temperature water outlet plunger pump raises the internal pressure of the metal hose to the design pressure of the metal hose, the normal temperature water outlet valve is closed, and the drive component starts to work, and the metal hose is tested again. In this way, a large temperature change can be achieved to verify the metal hose's ability to withstand sudden cooling and sudden heating.

[0041] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A nuclear power metal hose cyclic load test device, characterized in that: The device comprises a positioning frame (2) and a conveying assembly (4), wherein the positioning frame (2) is used for mounting a metal hose (40), a driving assembly (3) is arranged on the positioning frame (2), the driving assembly (3) is used for carrying out a load test on the metal hose (40), and the conveying assembly (4) is used for injecting and outputting cold water or hot water into the metal hose (40).

2. A nuclear power metal hose cyclic load test device according to claim 1, characterized in that: The positioning frame (2) comprises a receiving groove (30) and a connecting rod (5) arranged on the receiving groove (30); a clamp (6) is arranged on the connecting rod (5), and the clamp (6) is used to mount one end of the metal hose (40); the receiving groove (30) is located below the clamp (6), and the opening of the receiving groove (30) faces the clamp (6).

3. A nuclear power metal hose cyclic load test device according to claim 2, characterized in that: Limit blocks (36) are slidably provided on the opposite groove walls of the receiving groove (30); after the metal hose (40) is bent in the receiving groove (30), the limit blocks (36) are located on the inner side of the metal hose (40); linkage blocks (37) are provided on the two limit blocks (36); a power motor (38) is provided on the receiving groove (30); a screw rod (39) is coaxially provided on the motor shaft of the power motor (38); two threads with opposite rotation directions are provided on the screw rod (39); and the two linkage blocks (37) are respectively connected to the screw rod (39) through two threads.

4. A nuclear power metal hose cyclic load test device according to claim 3, characterized in that: The groove wall of the containing groove (30) and the outer side wall of the limiting block (36) are both coated with a low-friction coating.

5. A nuclear power metal hose cyclic load test device according to claim 2, characterized in that: The driving assembly (3) comprises a driving cylinder (31) arranged on the receiving groove (30), the axis of the driving cylinder (31) is parallel to the central axis of the clamp (6), a push plate (32) is provided on the end surface of the piston rod of the driving cylinder (31), and the free end of the metal hose (40) is connected to the push plate (32).

6. A nuclear power metal hose cyclic load test device according to claim 5, characterized in that: The push plate (32) is equipped with a displacement sensor for detecting the moving distance of the free end of the metal hose (40) and transmitting the detection information to the controller.

7. A nuclear power metal hose cyclic load test device according to claim 5, characterized in that: The push plate (32) is provided with a driving motor (33), the motor shaft of the driving motor (33) is coaxially provided with a driving gear (34), the push plate (32) is rotatably provided with a driven gear (35), the driven gear (35) is meshed with the driving gear (34), and the driven gear (35) is connected to the free end of the metal hose (40).

8. A nuclear power metal hose cyclic load test device according to claim 1, characterized in that: The conveying assembly (4) comprises: a hot water inlet plunger pump (8), a hot water outlet plunger pump (9), a normal temperature water inlet plunger pump (10), a normal temperature water outlet plunger pump (11), a normal temperature water tank (12), a hot water tank (13), a circulating water pipe (14), a hot water pipe (15) and a normal temperature water pipe (16); two inlets of one end of the metal hose (40) close to the clamp (6) are respectively connected to the hot water pipe (15) and the normal temperature water pipe (16), the outlet is connected to one end of the circulating water pipe (14), and the other end of the circulating water pipe (14) is connected to the hot water pipe (15) and the normal temperature water pipe (16). The two outlets are respectively provided with a first water return pipe (20) and a second water return pipe (21); the first water return pipe (20), a normal temperature water inlet plunger pump (10), a third water return pipe (23), a normal temperature water tank (12), a first water outlet pipe (24), a normal temperature water outlet plunger pump (11), and a normal temperature water pipe (16) are connected in sequence; the second water return pipe (21), a hot water inlet plunger pump (8), a fourth water return pipe (27), a hot water tank (13), a second water outlet pipe (28), a hot water outlet plunger pump (9), and a hot water pipe (15) are connected in sequence.

9. A nuclear power metal hose cyclic load test device according to claim 8, characterized in that: The circulating water pipe (14) is provided with a pressure transmitter (17) and a temperature transmitter (18) for detecting the pressure and temperature of the liquid in the metal hose (40) and transmitting the data to the controller.

10. A nuclear power metal hose cyclic load test device according to claim 8, characterized in that: The first water return pipe (20) is provided with a normal temperature water inlet valve (22), the normal temperature water pipe (16) is provided with a normal temperature water outlet valve (25), the second water return pipe (21) is provided with a hot water inlet valve (26), and the hot water pipe (15) is provided with a hot water outlet valve (29).

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