External clamping type water pressure test tool for heat exchange tube

Abstract

The utility model relates to the technical field of boiler and pressure vessel preparation, in particular to an external clamping type heat exchange tube hydrostatic test tool which comprises a test bed, a pressurization mechanism is installed on the test bed, a cold water supply mechanism is installed at the input end of the pressurization mechanism, and a supporting mechanism is arranged at the output end of the pressurization mechanism. Water in a high-pressure pipe is pressurized through a booster pump, so that the water pressure in a heat exchange pipe of the heat exchange assembly is increased, whether the heat exchange pipe leaks water or is damaged or not is observed, and therefore the water pressure test on the heat exchange pipe is completed; a medium pipe of the heat exchange assembly is connected with an output valve through supporting of a supporting mechanism, and the temperature of a medium is controlled through a heating pool; the water pressure test of the heat exchange tube is simulated when the medium tube conveys media with different temperatures, the water pressure test of the heat exchange tube is carried out under the same conditions of actual application and test, the deviation of test data is reduced, and the compression strength of the heat exchange tube is more accurate when the heat exchange tube is actually installed and applied.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler and pressure vessel preparation, in particular to an external clamping type heat exchange tube water pressure test tool. Background Art

[0002] The heat exchange tube is one of the main pressure-bearing components of the heat exchanger. There is also a medium tube inside the heat exchanger cylinder. The heat exchange tube is used to exchange heat with the medium in the medium tube. The heat exchange tube has high thermal conductivity and good isothermal properties. It can quickly transfer heat energy from one point to another. There is almost no heat loss in the heat exchange process. It is widely used in cold exchange equipment in the petroleum, chemical and other industries.

[0003] The quality of heat exchange tubes is one of the key factors to ensure the normal operation of heat exchangers. Therefore, it is necessary to ensure that each heat exchange tube can meet the water pressure test requirements of the equipment and reduce the risk of subsequent equipment repair. Usually, heat exchange tubes need to be subjected to water pressure tests one by one in the following situations: (1) Relevant steel pipe standards require that heat exchange tubes need to be subjected to water pressure tests, ultrasonic flaw detection, and eddy current inspection (which can replace water pressure tests) one by one; (2) For special occasions such as high temperature and high pressure, flammable and explosive media, extremely high hazards, and stress corrosion, the possibility of heat exchange tube leakage is not allowed, and heat exchange tubes need to be subjected to water pressure tests one by one; (3) According to the relevant requirements of GB / T151, U-shaped heat exchange tubes need to be subjected to pressure resistance tests one by one after bending; (4) For equipment with special and complex structures, heat exchange tubes need to be subjected to water pressure tests one by one before assembly.

[0004] Therefore, in the manufacturing process of heat exchangers, conducting a water pressure test on the heat exchange tubes before welding is one of the very important steps, which is directly related to the safety and stability of the entire heat exchanger equipment. Since heat exchange tubes are of various forms and have different usage scenarios, and the test scenarios provided by the existing heat exchange tube water pressure test device are fixed, for some media with different temperatures, the actual application water pressure is different from the test water pressure, resulting in deviations in the test data and affecting the actual installation and application of the heat exchange tubes; therefore, to address the above problems, an external clamp-type heat exchange tube water pressure test fixture is proposed. Utility Model Content

[0005] The problem solved by the utility model is to provide an external clamp-type water pressure test tool for heat exchange tubes, which solves the technical problem that the test scene provided by the existing water pressure test device for heat exchange tubes is fixed, and for some media with different temperatures, the actual applied water pressure is different from the tested water pressure, resulting in deviations in the test data.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A clamp-on heat exchange tube water pressure test fixture comprises a test bench, a boosting mechanism is installed on the test bench, a cold water supply mechanism is installed at the input end of the boosting mechanism, a support mechanism is provided at the output end of the boosting mechanism, the support mechanism is used to support the heat exchange component, and a medium supply mechanism is installed on the test bench; the boosting mechanism comprises a boosting pump, a high-pressure pipe is installed at the output end of the boosting pump, and the high-pressure pipe is connected to port one of the heat exchange component; the cold water supply mechanism comprises a cold water pipe, and the cold water pipe is used to transport water into the high-pressure pipe; a pressure regulating component is installed on the support mechanism, and the output end of the pressure regulating component is connected to port two of the heat exchange component; the medium supply mechanism comprises a heating pool, and an input valve and an output valve are respectively installed at the input end and output end of the heating pool, and the output valve is connected to port two of the heat exchange component.

[0008] Preferably, a movable bracket is installed inside the heating pool, a support sleeve is installed on the movable bracket, and two groups of support sleeves are provided corresponding to the input valve and the output valve, a heating tube is provided between the two groups of support sleeves, an electric heating component is installed on the movable bracket, and the electric heating component is used to heat the inside of the heating pool.

[0009] Preferably, a mounting seat is provided on the outside of the heating pool, and the mounting seat is fixedly connected to the movable bracket, a jacking assembly is installed on the test bench, and the output end of the jacking assembly is fixedly connected to the mounting seat, side top blocks are installed on both sides of the movable bracket, and the side top blocks are slidably arranged along the inner wall of the heating pool, a guide column is installed between the test bench and the mounting seat, and the guide column is a telescopic column component.

[0010] Preferably, the supporting mechanism includes a supporting frame, the pressure regulating assembly is installed on the supporting frame, a cross pillow block is installed transversely on the supporting frame, and the cross pillow block is used to support the heat exchange assembly.

[0011] Preferably, a clamp assembly is installed on the cross-bolt block, and the clamp assembly includes a fixed seat, and movable block one and movable block two are vertically slidably provided on one side of the fixed seat, and movable block two is located below movable block one, and a stud is provided on one side of the fixed seat, and the stud is threadedly connected to movable block one and movable block two, and an adjustment handle is fixed on the top of the stud.

[0012] Preferably, a pressure plate is fixedly provided on the side of the movable block 1 away from the fixed seat, and a bottom plate is fixedly provided on the side of the movable block 2 away from the fixed seat, and a slot is provided on the top of the bottom plate.

[0013] Preferably, a control box is installed on the test bench, a PLC controller is installed inside the control box, and the PLC controller is used to control the operation of the booster pump.

[0014] Preferably, the output end of the high-pressure tube is connected to an output tube, a pressure measuring tube is installed on the output tube, a connector is fixedly provided at the output end of the output tube, and the connector is connected to the heat exchange component.

[0015] Preferably, a water inlet pipe is installed at the input end of the cold water pipe, a flow valve is installed on the cold water pipe, and the flow valve is used to detect the water supply flow from the cold water pipe to the high-pressure pipe.

[0016] Preferably, the pressure regulating assembly includes a pressure regulating box, an input end of the pressure regulating box is equipped with a pressure regulating rod, and an output end of the pressure regulating box is connected to the heat exchange assembly.

[0017] The beneficial effects of the present invention are as follows: the water inside the high-pressure pipe is pressurized by the booster pump, so that the water pressure inside the heat exchange tube of the heat exchange component is increased, and the heat exchange tube is observed to see if there is water leakage or damage, thereby completing the water pressure test of the heat exchange tube; the medium pipe of the heat exchange component is connected to the output valve through the support of the support mechanism, and the temperature of the medium is controlled by the heating pool, simulating the medium pipe conveying media of different temperatures, and conducting a water pressure test on the heat exchange tube, so as to meet the requirement of conducting water pressure test of the heat exchange tube under the same conditions in actual application and test, reduce the deviation of the test data, and make the pressure resistance of the heat exchange tube more accurate in actual application.

[0018] The utility model can clamp external clamping components with different edge shapes through different special-shaped grooves of the pressure plate and the bottom plate. When the edge shape of the external clamping component is an arc, the arcuate edge is clamped into the clamping groove, and the pressure plate presses the arcuate edge from the top to position the arcuate edge in the clamping groove, thereby completing the clamping and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a schematic structural diagram of the boosting mechanism of the present utility model.

[0021] Figure 3 This is a schematic diagram of the support mechanism structure of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the clamp assembly of the present utility model.

[0023] Figure 5 This is a structural diagram of the medium supply mechanism of the present utility model.

[0024] Figure 6 This is a top view of the medium supply mechanism of the present invention.

[0025] Figure 7 It is a side view schematic diagram of the medium supply mechanism of the present invention.

[0026] Figure 1: Test bench; 11: Control box; 2: Booster mechanism; 21: Booster pump; 22: High-pressure pipe; 23: Output pipe; 24: Pressure measuring pipe; 25: Connector; 3: Cold water supply mechanism; 31: Cold water pipe; 32: Inlet pipe; 33: Flow valve; 4: Support mechanism; 41: Pressure regulating assembly; 411: Pressure regulating box; 412: Pressure regulating rod; 42: Clamp assembly; 421: Fixed seat; 422: Movable block 1; 423: , movable block 2; 424, stud; 425, adjustment handle; 426, pressure plate; 427, bottom plate; 428, slot; 43, support frame; 44, cross pillow block; 5, medium supply mechanism; 51, heating pool; 52, side top block; 53, support sleeve; 531, heating tube; 54, input valve; 55, output valve; 56, movable bracket; 561, electric heating component; 57, mounting seat; 58, cylinder; 59, guide column. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Specific examples are given below.

[0029] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 5 , a clamp-on heat exchange tube water pressure test fixture, comprising a test bench 1, a boosting mechanism 2 is installed on the test bench 1, a cold water supply mechanism 3 is installed at the input end of the boosting mechanism 2, a support mechanism 4 is provided at the output end of the boosting mechanism 2, the support mechanism 4 is used to support the heat exchange component, and a medium supply mechanism 5 is installed on the test bench 1; the boosting mechanism 2 includes a boosting pump 21, a high-pressure pipe 22 is installed at the output end of the boosting pump 21, and the high-pressure pipe 22 is connected to the first port of the heat exchange component; the cold water supply mechanism 3 includes a cold water pipe 31, and the cold water pipe 31 is used to transport water into the high-pressure pipe 22; a pressure regulating assembly 4 is installed on the support mechanism 4, and the output end of the pressure regulating assembly 41 is connected to the second port of the heat exchange component; the medium supply mechanism 5 includes a heating pool 51, and an input valve 54 and an output valve 55 are respectively installed at the input end and the output end of the heating pool 51, and the output valve 55 is connected to the second port of the heat exchange component.

[0030] During operation, the booster pump 21 is used to increase the air pressure inside the high-pressure pipe 22. A solenoid valve is connected between the high-pressure pipe 22 and the cold water pipe 31. The support mechanism 4 is supported in the middle of the heat exchange component. The outer side of the middle of the heat exchange component is provided with an outer clamping component for fixing multiple heat exchange tubes. The heat exchange component includes heat exchange tubes and medium tubes. Port 1 is the inlet of the heat exchange tube, and port 2 is the inlet of the medium tube.

[0031] Water is supplied to the high-pressure pipe 22 through the cold water pipe 31, and the water inside the high-pressure pipe 22 is pressurized by the booster pump 21, so that the water pressure inside the heat exchange tube of the heat exchange component is increased, and the heat exchange tube is observed to see if there is any leakage or damage, thereby completing the water pressure test of the heat exchange tube. The medium pipe of the heat exchange component is supported by the support mechanism 4 to connect to the output valve 55, and the temperature of the medium is controlled by the heating pool 51. The water pressure test of the heat exchange tube is simulated when the medium pipe transports media of different temperatures, so as to meet the water pressure test of the heat exchange tube under the same conditions in actual application and test, reduce the deviation of the test data, and make the pressure resistance of the heat exchange tube more accurate in actual application.

[0032] Furthermore, the output end of the high-pressure pipe 22 is connected to the output pipe 23, and a pressure measuring tube 24 is installed on the output pipe 23. A connector 25 is fixedly provided at the output end of the output pipe 23, and the connector 25 is connected to the heat exchange component. A pressure test gauge is installed on the pressure measuring tube 24, and is connected to the water inlet port of the heat exchange pipe through the connector 25.

[0033] Furthermore, a water inlet pipe 32 is installed at the input end of the cold water pipe 31, and a flow valve 33 is installed on the cold water pipe 31. The flow valve 33 is used to detect the water supply flow from the cold water pipe 31 to the high-pressure pipe 22. The water inlet pipe 32 is connected to an external water supply pump, and the flow valve 33 is installed in the middle of the cold water pipe 31. The flow valve 33 detects the water supply flow of the cold water pipe 31.

[0034] Furthermore, a control box 11 is installed on the test bench 1, and a PLC controller is installed inside the control box 11. The PLC controller is used to control the operation of the boost pump 21. The PLC controller is used to control the boost intensity of the boost pump 21. For the convenience of display, a display meter can be installed in the control box 11. This technology is a common operation for people in this field.

[0035] Furthermore, the pressure regulating assembly 41 includes a pressure regulating box 411, and a pressure regulating rod 412 is installed at the input end of the pressure regulating box 411. The output end of the pressure regulating box 411 is connected to the heat exchange assembly. Operating the pressure regulating rod 412 can increase the flow rate of the medium pipe through the pressure regulating box 411, thereby adapting to the operation of different medium pipes.

[0036] Furthermore, the support mechanism 4 includes a support frame 43 , the pressure regulating assembly 41 is mounted on the support frame 43 , a transverse pillow block 44 is transversely mounted on the support frame 43 , and the transverse pillow block 44 is used to support the heat exchange assembly.

[0037] See also Figure 3 and Figure 4 A clamp assembly 42 is installed on the horizontal pillow block 44, and the clamp assembly 42 includes a fixed seat 421. A movable block 1 422 and a movable block 2 423 are vertically slidably provided on one side of the fixed seat 421, and the movable block 2 423 is located below the movable block 1 422. A stud 424 is provided on one side of the fixed seat 421, and the stud 424 is threadedly connected to the movable block 1 422 and the movable block 2 423. An adjustment handle 425 is fixed on the top of the stud 424.

[0038] During operation, by twisting the adjustment handle 425, the movable block 1 422 and the movable block 2 423 can be brought closer together. The movable block 1 422 and the movable block 2 423 are used to clamp the outer clamping assembly on the outer side of the middle part of the heat exchange assembly, thereby positioning the heat exchange assembly.

[0039] Furthermore, a pressure plate 426 is fixedly provided on the side of the movable block 422 away from the fixed seat 421, and a bottom plate 427 is fixedly provided on the side of the movable block 423 away from the fixed seat 421. A card slot 428 is provided on the top of the bottom plate 427, and a special-shaped groove is provided on the bottom of the pressure plate 426. A corresponding special-shaped groove is provided on the top of the bottom plate 427. The special-shaped groove is concave, V-shaped or other shapes.

[0040] External clamping components with different edge shapes can be clamped through different special-shaped grooves. When the edge shape of the external clamping component is an arc, the arc edge is clamped into the slot 428, and the pressure plate 426 presses the arc edge from the top to position the arc edge in the slot 428, thereby completing the clamping positioning.

[0041] See also Figures 5 to 7 A movable bracket 56 is installed inside the heating pool 51, and a support sleeve 53 is installed on the movable bracket 56. Two groups of support sleeves 53 are provided corresponding to the input valve 54 and the output valve 55. A heating pipe 531 is provided between the two groups of support sleeves 53. An electric heating component 561 is installed on the movable bracket 56, and the electric heating component 561 is used to heat the inside of the heating pool 51; the input valve 54 and the output valve 55 are connected through the support sleeve 53 and the heating pipe 531, and the heating pipe 531 is located inside the heating pool 51. The heating pool 51 can be filled with a heating medium. The electric heating component 561 heats the heating medium in the heating pool 51, thereby increasing the temperature of the medium inside the heating pipe 531. The common heating medium is air, and no filling is required.

[0042] Furthermore, a mounting seat 57 is provided on the outer side of the heating pool 51, and the mounting seat 57 is fixedly connected to the movable bracket 56. A cylinder 58 is installed on the test bench 1, and the output end of the cylinder 58 is fixedly connected to the mounting seat 57. Side top blocks 52 are installed on both sides of the movable bracket 56, and the side top blocks 52 are slidably arranged along the inner wall of the heating pool 51. A guide column 59 is installed between the test bench 1 and the mounting seat 57, and the guide column 59 is a telescopic column component.

[0043] The mounting base 57 is used to install the temperature detection component and the controller of the cylinder 58. The mounting base 57 drives the movable bracket 56 to move vertically. The cylinder 58 is the driving component for vertical movement. When the temperature of the heating tube 531 needs to be lowered and adjusted, the movable bracket 56 is lifted so that the heating tube 531 is located outside the heating pool 51, which can reduce the temperature of the heating tube 531 more quickly.

[0044] The temperature inside the heating pool 51 is increased by the electric heating component 561, thereby increasing the temperature of the medium inside the heating tube 531. When the temperature of the medium inside the heating tube 531 needs to be lowered, the mounting seat 57 and the movable bracket 56 are lifted by the cylinder 58, so that the support sleeve 53 and the heating tube 531 are raised. When the heating tube 531 is located outside the heating pool 51, a rapid cooling effect can be achieved.

[0045] Working principle: When clamping and fixing the heat exchange tube, by twisting the adjustment handle 425, the movable block 1 422 and the movable block 2 423 can be moved closer. The movable block 1 422 and the movable block 2 423 are used to clamp the outer clamping assembly on the outer side of the middle part of the heat exchange assembly, thereby positioning the heat exchange assembly;

[0046] Different shaped grooves can be used to clamp external clamping components with different edge shapes. For example, the edge shape of the external clamping component is an arc. The arc edge is inserted into the clamping groove 428. The pressing plate 426 presses the arc edge from the top to position the arc edge in the clamping groove 428, thereby completing the clamping and positioning of the heat exchange tube.

[0047] The water inside the high-pressure pipe 22 is pressurized by the booster pump 21, so that the water pressure inside the heat exchange tube of the heat exchange component is increased, and the heat exchange tube is observed to see if there is any leakage or damage, thereby completing the water pressure test of the heat exchange tube. The medium pipe of the heat exchange component is supported by the support mechanism 4 to connect to the output valve 55, and the temperature of the medium is controlled by the heating pool 51. The water pressure test of the heat exchange tube is simulated when the medium pipe transports media of different temperatures, so that the water pressure test of the heat exchange tube is carried out under the same conditions in actual application and test, reducing the deviation of the test data and making the pressure resistance of the heat exchange tube more accurate in actual application.

[0048] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An external clamp type heat exchange tube hydraulic test fixture, characterized in that: The test bench (1) comprises a pressure-boosting mechanism (2) installed on the test bench (1), a cold water supply mechanism (3) installed at the input end of the pressure-boosting mechanism (2), a support mechanism (4) provided at the output end of the pressure-boosting mechanism (2), the support mechanism (4) being used to support a heat exchange component, and a medium supply mechanism (5) installed on the test bench (1); The boosting mechanism (2) includes a boosting pump (21), the output end of the boosting pump (21) is provided with a high-pressure pipe (22), and the high-pressure pipe (22) is in communication with a port of the heat exchange component; The cold water supply mechanism (3) includes a cold water pipe (31), and the cold water pipe (31) is used to transport water into the high-pressure pipe (22); A pressure regulating assembly (41) is installed on the support mechanism (4), and the output end of the pressure regulating assembly (41) is connected to the second port of the heat exchange assembly; The medium supply mechanism (5) comprises a heating pool (51), the input end and the output end of the heating pool (51) are respectively equipped with an input valve (54) and an output valve (55), and the output valve (55) is communicated with the second port of the heat exchange component.

2. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: The output end of the high-pressure pipe (22) is connected to an output pipe (23), a pressure measuring pipe (24) is installed on the output pipe (23), a connector (25) is fixedly provided on the output end of the output pipe (23), and the connector (25) is connected to the heat exchange component, a pressure test gauge is installed on the pressure measuring pipe (24), and the water inlet port of the heat exchange pipe is connected through the connector (25).

3. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: The input end of the cold water pipe (31) is provided with a water inlet pipe (32), a flow valve (33) is provided on the cold water pipe (31), and the flow valve (33) is used to detect the water flow from the cold water pipe (31) to the high-pressure pipe (22), and the water inlet pipe (32) is connected to an external water supply pump.

4. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: A control box (11) is installed on the test bench (1), a PLC controller is installed inside the control box (11), and the PLC controller is used to control the operation of the booster pump (21). A display meter is installed inside the control box (11).

5. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: The pressure regulating assembly (41) comprises a pressure regulating box (411), a pressure regulating rod (412) is installed at the input end of the pressure regulating box (411), and the output end of the pressure regulating box (411) is connected to the heat exchange assembly.

6. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: The support mechanism (4) comprises a support frame (43), the pressure regulating assembly (41) is mounted on the support frame (43), a transverse pillow block (44) is transversely mounted on the support frame (43), and the transverse pillow block (44) is used to support the heat exchange assembly.

7. The external clamp type heat exchange tube hydraulic test fixture according to claim 6, characterized in that: A clamp assembly (42) is installed on the cross pillow block (44), and the clamp assembly (42) includes a fixed seat (421). A movable block 1 (422) and a movable block 2 (423) are vertically slidably provided on one side of the fixed seat (421), and the movable block 2 (423) is located below the movable block 1 (422). A stud (424) is provided on one side of the fixed seat (421), and the stud (424) is threadedly connected to the movable block 1 (422) and the movable block 2 (423). An adjustment handle (425) is fixed on the top of the stud (424).

8. The external clamp type heat exchange tube hydraulic test fixture according to claim 7, characterized in that: A pressure plate (426) is fixedly provided on the side of the movable block 1 (422) away from the fixed seat (421), and a bottom plate (427) is fixedly provided on the side of the movable block 2 (423) away from the fixed seat (421). A slot (428) is provided on the top of the bottom plate (427), a special-shaped groove is provided on the bottom of the pressure plate (426), and a corresponding special-shaped groove is provided on the top of the bottom plate (427).

9. The external clamp type heat exchange tube hydraulic test fixture according to claim 1, characterized in that: A movable bracket (56) is installed inside the heating pool (51), a support sleeve (53) is installed on the movable bracket (56), and two groups of support sleeves (53) are provided corresponding to the input valve (54) and the output valve (55), a heating pipe (531) is provided between the two groups of support sleeves (53), an electric heating component (561) is installed on the movable bracket (56), and the electric heating component (561) is used to heat the inside of the heating pool (51), the heating pipe (531) is located inside the heating pool (51), and the heating pool (51) can be filled with a heating medium.

10. The external clamp type heat exchange tube hydraulic test fixture according to claim 9, characterized in that: A mounting seat (57) is provided on the outer side of the heating pool (51), and the mounting seat (57) is fixedly connected to the movable bracket (56). A cylinder (58) is installed on the test bench (1), and the output end of the cylinder (58) is fixedly connected to the mounting seat (57). Side top blocks (52) are installed on both sides of the movable bracket (56), and the side top blocks (52) are slidably arranged along the inner wall of the heating pool (51). A guide column (59) is installed between the test bench (1) and the mounting seat (57), and the guide column (59) is a telescopic column component.

Images