Device for detecting heat insulation performance of heat insulation oil pipe and use method of device

Abstract

The invention relates to the field of thermal insulation oil pipe detection equipment, in particular to a thermal insulation oil pipe thermal insulation performance detection device and a use method thereof.The thermal insulation oil pipe thermal insulation performance detection device comprises a detection pool with the hollow interior and the open top, and the open end of the detection pool is detachably provided with a pool cover frame with the hollow interior and the two vertical ends open; the heat insulation oil pipe is placed between the detection pool and the pool cover frame, the detection pool and the pool cover frame are jointly provided with clamping grooves used for containing the heat insulation oil pipe, sealing rubber strips are arranged between the detection pool and the pool cover frame, between the detection pool and the heat insulation oil pipe and between the pool cover frame and the heat insulation oil pipe, and end disc covers are detachably arranged at the two ends of the heat insulation oil pipe. The end disc cover is provided with a temperature sensor and an electric heating pipe, the temperature sensor and the electric heating pipe are both electrically connected to the control system, and the detection pool is provided with a liquid level adjusting piece, a liquid constant temperature piece, a gas circulation piece and a detection assembly. The method has the effect of improving the accuracy of the thermal insulation performance detection result of the thermal insulation oil pipe.

Description

Technical Field

[0001] The present application relates to the field of insulated oil pipe testing equipment, and in particular to a device for testing the thermal insulation performance of an insulated oil pipe and a method for using the same. Background Art

[0002] Insulated oil pipe is a special oil pipe used in steam injection wells. It is usually composed of an inner pipe and an outer pipe. The space between the two pipes is filled with insulating materials such as vermiculite, glass wool, pearl powder, etc. and is evacuated to reduce heat loss. The inner and outer pipes are usually made of steel.

[0003] Before the insulated oil pipe leaves the factory, it is necessary to test its thermal insulation performance. The traditional testing method is to place a heating pipe with a temperature sensor inside the insulation pipe in an open-air environment in the factory, and then seal both ends of the insulation pipe. After a period of time, the temperature on the outer wall of the insulation pipe is detected by a temperature probe to obtain the thermal insulation performance parameters of the insulation pipe.

[0004] However, in actual use, the insulated oil pipe needs to be buried underground or installed under seawater, and the soil is usually rich in water. In addition, the temperature of the underground soil or seawater is usually low and almost constant. The thermal insulation efficiency of the insulated oil pipe made of steel is better, so the heat loss of the insulated oil pipe in the air and in the water due to heat transfer is different, which leads to a large difference between the thermal insulation performance parameters of the insulated oil pipe obtained from the factory test and the thermal insulation effect of the insulated oil pipe during actual use, which has shortcomings. Summary of the Invention

[0005] In order to improve the accuracy of the thermal insulation performance results of the detected insulated oil pipe, the present application provides an insulated oil pipe thermal insulation performance detection device and a method for using the same.

[0006] In the first aspect, the present application provides a device for testing the thermal insulation performance of an insulated oil pipe, which adopts the following technical solutions: A device for testing the thermal insulation performance of an insulated oil pipe comprises a test pool with a hollow interior and an open top, the open end of the test pool is detachably provided with a pool cover frame with a hollow interior and open at both ends vertically, the insulated oil pipe is placed between the test pool and the pool cover frame, the test pool and the pool cover frame are jointly provided with a slot for placing the insulated oil pipe, sealing strips are provided between the test pool and the pool cover frame, between the test pool and the insulated oil pipe, and between the pool cover frame and the insulated oil pipe, both ends of the insulated oil pipe are detachably provided with end plate covers, the end plate covers are provided with temperature sensors and electrical The heating tube, the temperature sensor and the electric heating tube are electrically connected to a control system, the heating end of the electric heating tube and the sensing end of the temperature sensor are both used to be placed in an insulated oil pipe, and the detection pool is provided with a liquid level adjustment component, a liquid constant temperature component, a gas circulation component and a detection assembly, the liquid level adjustment component is used to adjust the height of the liquid level in the detection pool, the liquid constant temperature component is used to stabilize the liquid temperature in the detection pool, the gas circulation component is used to circulate the air in the insulated oil pipe, and the detection assembly is used to detect the temperature of the outer wall of the insulated oil pipe in the detection pool.

[0007] By adopting the above technical solution, workers first use the lifting equipment to hang the insulated oil pipe on the slot of the detection pool, and then hang the pool cover frame on the detection pool, and make the slot on the pool cover frame clamp on the insulated oil pipe, and then fix the pool cover frame on the detection pool, the sealing strip deforms and realizes leak-proof, the liquid level adjustment component adjusts the liquid level in the detection pool to rise to the pool cover frame, so that the insulated oil pipe is completely immersed in the liquid, and the liquid constant temperature component makes the liquid temperature in the detection pool tend to be stable. At the same time, workers install the end plate covers on both ends of the insulated oil pipe and control The system starts the temperature sensor and electric heating tube. The electric heating tube heats the air in the insulated oil pipe and maintains it within the designed temperature range. The gas circulation component circulates the air in the insulated oil pipe. At this time, the detection component continuously detects the temperature of the outer wall of the insulated oil pipe. After a period of time, the control system feeds back the output power of the electric heating tube during the test period and the temperature value fed back by the detection component. The lower the power output of the electric heating tube, the better the thermal insulation performance of the insulated oil pipe. By eliminating the influence of heat transfer of the liquid, the performance test results are more accurate.

[0008] Optionally, the liquid level adjustment component includes a support frame arranged next to the detection pool, a water tower is provided on the support frame, the height of the water tower is higher than the height of the pool cover frame placed on the detection pool, an inlet pipe is connected between the bottom of the water tower and the bottom of the detection pool, a return pipe is connected between the top of the water tower and the bottom of the detection pool, an electromagnetic valve electrically connected to the control system is provided on the inlet pipe, and a reflux pump electrically connected to the control system is provided on the return pipe.

[0009] By adopting the above technical solution, when the pool cover frame is installed, the control system starts the solenoid valve to open, and the water in the water tower flows into the detection pool through the water inlet pipe under the action of gravity, so that the liquid level in the detection pool rises to the pool cover frame, so that the insulating oil pipe is completely immersed in the liquid. When the insulating oil pipe inspection is completed, the control system starts the reflux pump, and the reflux pump pumps the liquid in the detection pool back into the water tower, making it convenient for workers to remove and replace the new insulating oil pipe.

[0010] Optionally, the liquid constant temperature component includes a refrigeration pipe connected to the detection pool at both ends along the length direction of the insulated oil pipe, and the refrigeration pipe is provided with a refrigerator, a circulating water pump and a liquid temperature meter. The refrigerator, the circulating water pump and the liquid temperature meter are all electrically connected to the control system.

[0011] By adopting the above technical solution, the control system starts the refrigerator, circulating water pump and liquid temperature meter. The circulating water pump continuously circulates the liquid at both ends of the detection pool through the refrigerator. The refrigerator cools the liquid flowing through it. The liquid temperature meter constantly feeds back the temperature of the liquid in the detection pool, so that the liquid temperature around the insulated oil pipe always tends to be constant.

[0012] Optionally, the gas circulation component includes an air pipe arranged on the detection pool, a mounting pipe for connecting with the insulated oil pipe is provided on the end plate cover, a connecting pipe is detachably provided between the mounting pipe and the air pipe, and a circulating air pump electrically connected to the control system is provided on the air pipe.

[0013] By adopting the above technical solution, the control system starts the circulating air pump, and the circulating air pump allows the gas to circulate continuously at both ends of the insulated oil pipe through the air pipe and the connecting pipe, so that the temperature at various locations in the insulated oil pipe tends to be consistent, which is conducive to improving the accuracy of the test results.

[0014] Optionally, both ends of the gas pipe are provided with gas temperature meters electrically connected to a control system, and both the gas pipe and the connecting pipe are provided with a thermal insulation layer.

[0015] By adopting the above technical solution, the heat loss of the high-temperature air in the insulated oil pipe when flowing through the gas pipe and the connecting pipe is reduced. At the same time, the gas temperature instrument can constantly feedback the temperature drop of the high-temperature gas during the circulation process, which is conducive to improving the accuracy of the insulation performance test results of the insulated oil pipe.

[0016] Optionally, the detection component includes a bottom box that is slidably arranged in the detection pool and is hollow inside. The detection pool is provided with a sliding member that drives the bottom box to slide along the length direction of the heat-insulating oil pipe. The bottom box is provided with a first detection seat and a second detection seat with the same structure. The first detection seat is hinged on the second detection seat. A sealing rubber pad is provided between the first detection seat and the second detection seat. The heat-insulating oil pipe is located between the first detection seat and the second detection seat. The first detection seat and the second detection seat are jointly provided with a through groove for placing the heat-insulating oil pipe. The first detection seat is along the axial direction of the heat-insulating oil pipe. Sealing bags are provided on both sides, and a receiving groove with a C-shaped cross-section and connected to the through groove is provided on the first detection seat. The sealing bag is placed in the receiving groove, and the sealing bag is used to abut the outer wall of the insulated oil pipe. The bottom box is provided with a pressure supply part for punching into the sealing bag, and the first detection seat between the two receiving grooves is provided with a placement groove connected to the through groove. The placement groove is provided with an oil cylinder electrically connected to the control system, and the piston rod of the oil cylinder is provided with a temperature probe electrically connected to the control system. The temperature probe is used to stick to the outer wall of the insulated oil pipe.

[0017] By adopting the above technical solution, after the insulated oil pipe is hoisted on the detection pool, the insulated oil pipe is also stuck in the through groove on the first detection seat. Then the worker rotates the second detection seat so that the insulated oil pipe is buckled by the through groove on the second detection seat and the through groove on the first detection seat. Then the pressure piece punches into the sealing bag, and the pressure in the sealing bag continues to increase and deforms. The deformed sealing bag abuts against the outer wall of the insulated oil pipe, thereby separating the temperature probe from the subsequently injected liquid, reducing the possibility of direct contact between the temperature probe and the liquid. Then the control system starts the oil cylinder, and the piston rod of the oil cylinder drives the temperature probe to stick to the outer wall of the insulated oil pipe. Since the length of the insulated oil pipe is much longer than the distance between the two sealing bags, and the thermal conductivity of the insulated oil pipe is better, the temperature of the outer wall of the insulated oil pipe detected by the temperature probe is close to the critical temperature of heat transfer when the outer wall of the insulated oil pipe contacts the liquid. In this way, the thermal insulation effect of the insulated oil pipe during actual use can be accurately detected. Finally, the sliding part drives the bottom box to slide, and then detects the thermal insulation performance of the insulated oil pipe in the length direction.

[0018] Optionally, the sliding member includes a driving shaft rotatably arranged on the bottom box, the driving shaft rotates through the inner and outer side walls of the bottom box, a sliding motor electrically connected to the control system is arranged in the bottom box, the driving shaft is coaxially arranged on the output shaft of the sliding motor, a sliding rail is arranged in the detection pool, the length direction of the sliding rail is parallel to the axial direction of the heat-insulating oil pipe, a sliding plate slidingly matched with the sliding rail is arranged on the bottom box, a rack is arranged in the detection pool and along the length direction of the sliding rail, and a gear meshing with the rack is arranged on the driving shaft.

[0019] By adopting the above technical solution, the control system starts the sliding motor, and the output shaft of the sliding motor drives the gear to rotate through the drive shaft. The reaction force between the rotating gear and the rack causes the bottom box to slide along the length direction of the slide rail, so that all parts of the insulated oil pipe in the detection pool can be detected, which is conducive to improving the accuracy of the insulated oil pipe performance test results.

[0020] Optionally, the pressure supply component includes an oil pump and an oil tank arranged in the bottom box, the oil inlet end of the oil pump is connected to the oil tank, and a pressure-resistant hose is connected between the oil outlet end of the oil pump and the sealing bag.

[0021] By adopting the above technical solution, the control system starts the oil pump, and the oil pump draws the hydraulic oil in the oil tank into the sealing bag through the pressure-resistant hose, thereby increasing the pressure in the sealing bag, and then causing the sealing bag to deform and abut against the outer wall of the insulating oil pipe.

[0022] Optionally, the ratio of the distance between the first detection seat and the insulation oil pipe along the axis direction to the length of the insulation oil pipe is 1:20.

[0023] By adopting the above technical solution, the influence of the air in the space where the temperature probe is located on the temperature detection of the outer wall of the insulated oil pipe is reduced, so that the temperature at the detection point of the temperature probe is closer to the critical temperature between the insulated oil pipe and the liquid.

[0024] In a second aspect, the present application provides a method for using a device for testing the thermal insulation performance of an insulated oil pipe, which adopts the following technical solution: A method for using a device for detecting the thermal insulation performance of an insulated oil pipe comprises the following steps: S1. First, hoist the heat-insulating oil pipe onto the slot of the detection tank using a hoisting device, then hoist the tank cover frame onto the detection tank so that the heat-insulating oil pipe is clamped by the slot on the tank cover frame, and finally fix the tank cover frame onto the detection tank; S2. Using the liquid level adjustment component, the liquid level in the detection tank is raised to the level of the tank cover frame, so that the insulated oil pipe is completely immersed in the liquid; S3, maintaining the temperature of the liquid in the detection pool constant by the liquid thermostat; S4. The control system activates the temperature sensor and the electric heating tube. The electric heating tube heats the air in the insulated oil pipe. The temperature sensor constantly provides feedback on the temperature of the air in the insulated oil pipe. Meanwhile, the gas circulation element continuously circulates the air in the insulated oil pipe. S5. The control system maintains the air in the insulated oil pipe at a design temperature through the temperature sensor and the electric heating pipe. At the same time, the detection component detects the temperature of the outer wall of the insulated oil pipe. S6. After a period of time, the control system feeds back the output power of the electric heating pipe during the detection period and the temperature value of the outer wall of the insulated oil pipe fed back by the detection component.

[0025] By adopting the above technical solution, the detected thermal insulation effect of the thermal insulation oil pipe is more consistent with the thermal insulation effect of the thermal insulation oil pipe during actual use.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The worker first uses the lifting equipment to hang the heat-insulating oil pipe on the slot of the detection pool, and then hangs the pool cover frame on the detection pool, and makes the slot on the pool cover frame stuck on the heat-insulating oil pipe. After that, the pool cover frame is fixed on the detection pool. The sealing strip is deformed and leak-proof. The liquid level adjustment component adjusts the liquid level in the detection pool to rise to the pool cover frame, so that the heat-insulating oil pipe is completely immersed in the liquid, and the liquid constant temperature component makes the liquid temperature in the detection pool stable. At the same time, the worker installs the end plate cover at both ends of the heat-insulating oil pipe and starts the control system. The temperature sensor and electric heating tube heat the air in the insulated oil pipe and maintain it within the designed temperature range. The gas circulation component circulates the air in the insulated oil pipe. At this time, the detection component continuously detects the temperature of the outer wall of the insulated oil pipe. After a period of time, the control system feedbacks the output power of the electric heating tube during the detection period and the temperature value feedback from the detection component. The lower the power output of the electric heating tube, the better the thermal insulation performance of the insulated oil pipe. By eliminating the influence of liquid heat transfer, the performance test results are more accurate. 2. The pressure supply part punches into the sealing bag, and the pressure inside the sealing bag continues to increase and deforms. The deformed sealing bag abuts against the outer wall of the insulated oil pipe, thereby separating the temperature probe from the subsequently injected liquid. The control system then starts the oil cylinder, and the piston rod of the oil cylinder drives the temperature probe to stick to the outer wall of the insulated oil pipe. Since the length of the insulated oil pipe is much longer than the distance between the two sealing bags, the temperature of the outer wall of the insulated oil pipe detected by the temperature probe at this time is close to the critical temperature of heat transfer when the outer wall of the insulated oil pipe contacts the liquid. In this way, the thermal insulation effect of the insulated oil pipe during actual use can be accurately detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view used to reflect the positional relationship between the insulated oil pipe, the detection cell and the electric heating pipe in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view used to reflect the positional relationship between the first detection seat, the sealing bag and the temperature probe in the embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view used to reflect the positional relationship among the sliding motor, the bottom box and the first detection seat in the embodiment of the present application.

[0031] Explanation of reference numerals: 1. Insulated oil pipe; 2. Detection tank; 3. Tank cover frame; 4. Card slot; 5. Sealing strip; 6. End plate cover; 7. Temperature sensor; 8. Electric heating pipe; 9. Liquid level adjustment member; 91. Support frame; 92. Water tower; 93. Water inlet pipe; 94. Water return pipe; 95. Solenoid valve; 96. Reflux pump; 10. Liquid thermostat; 101. Refrigeration pipe; 102. Refrigerator; 103. Circulating water pump; 104. Liquid temperature gauge; 11. Gas circulation member; 111. Gas pipe; 112. Mounting pipe; 113. Connecting pipe; 114. Circulating air pump; 12. Detection assembly; 12 0. Bottom box; 121. First detection seat; 122. Second detection seat; 123. Sealing pad; 124. Through groove; 125. Sealing bag; 126. Receiving groove; 127. Placement groove; 128. Oil cylinder; 129. Temperature probe; 13. Gas temperature meter; 14. Insulation layer; 15. Sliding part; 151. Drive shaft; 152. Sliding motor; 153. Slide rail; 154. Slide plate; 155. Rack; 156. Gear; 16. Pressure supply part; 161. Oil pump; 162. Oil tank; 163. Pressure-resistant hose; 17. Lifting ring; 18. Reinforcement rib; 19. Liquid level sensor. DETAILED DESCRIPTION

[0032] The following is combined with Figures 1-4 This application is described in further detail.

[0033] Example 1 An embodiment of the present application discloses a device for detecting the thermal insulation performance of an insulated oil pipe.

[0034] Reference Figure 1 A device for testing the thermal insulation performance of an insulated oil pipe includes a test pool 2 which is hollow inside and open at the top. The open end of the test pool 2 is bolted to a pool cover frame 3 which is hollow inside and open at both vertical ends. A lifting ring 17 is bolted to the top of the pool cover frame 3. A reinforcing rib plate 18 is bolted to the top of the pool cover frame 3. The insulated oil pipe 1 is placed between the test pool 2 and the pool cover frame 3. The test pool 2 and the pool cover frame 3 are jointly provided with a slot 4 for placing the insulated oil pipe 1.

[0035] Reference Figure 2 Sealing strips 5 are arranged between the detection pool 2 and the pool cover frame 3, between the detection pool 2 and the insulated oil pipe 1, and between the pool cover frame 3 and the insulated oil pipe 1. The sealing strips 5 can be made of rubber material, and end disc covers 6 are bolted to both ends of the insulated oil pipe 1.

[0036] Reference Figure 2A temperature sensor 7 and an electric heating tube 8 are bolted to the end plate cover 6. The temperature sensor 7 and the electric heating tube 8 are electrically connected to the control system. The heating end of the electric heating tube 8 and the sensing end of the temperature sensor 7 are both used to be placed in the insulated oil pipe 1.

[0037] The worker first uses the lifting equipment to lift the insulated oil pipe 1 onto the slot 4 of the detection pool 2. At this time, the insulated oil pipe 1 will be pressed against the sealing strip 5 at the slot 4 of the detection pool 2. Then the pool cover frame 3 is lifted onto the detection pool 2 by the lifting equipment, and the pool cover frame 3 is fixed to the detection pool 2 by bolts. Then the end plate cover 6 is bolted to the end of the insulated oil pipe 1.

[0038] Reference Figure 1 A liquid level adjusting component 9 is arranged on the detection pool 2. The liquid level adjusting component 9 is used to adjust the height of the liquid level in the detection pool 2. The liquid level adjusting component 9 includes a support frame 91 arranged next to the detection pool 2. A water tower 92 is bolted to the top of the support frame 91. The height of the water tower 92 is higher than the height of the pool cover frame 3 placed on the detection pool 2. The water tower 92 is filled with water. A liquid level sensor 19 electrically connected to the control system is bolted on the pool cover frame 3 and above the insulated oil pipe 1.

[0039] Reference Figure 1 An inlet pipe 93 is connected between the bottom of the water tower 92 and the bottom of the detection pool 2, and a return pipe 94 is connected between the top of the water tower 92 and the bottom of the detection pool 2. A solenoid valve 95 electrically connected to the control system is bolted to the inlet pipe 93, and a reflux pump 96 electrically connected to the control system is bolted to the support frame 91, and the reflux pump 96 is bolted to the return pipe 94.

[0040] Reference Figure 1 A liquid thermostat 10 is arranged on the detection pool 2. The liquid thermostat 10 is used to stabilize the temperature of the liquid in the detection pool 2. The liquid thermostat 10 includes a refrigeration pipe 101 connected to the detection pool 2 at both ends along the length direction of the insulated oil pipe 1. A refrigerator 102, a circulating water pump 103 and a liquid temperature meter 104 are bolted to the refrigeration pipe 101 in sequence along the direction of water flow. The refrigerator 102, the circulating water pump 103 and the liquid temperature meter 104 are all electrically connected to the control system.

[0041] Reference Figure 1 and Figure 2 A gas circulation component 11 is arranged on the detection pool 2. The gas circulation component 11 is used to circulate the air in the insulated oil pipe 1. The gas circulation component 11 includes an air pipe 111 bolted to the bottom of the detection pool 2, and a mounting pipe 112 for communicating with the insulated oil pipe 1 is welded on the end plate cover 6.

[0042] Reference Figure 1 and Figure 2A connecting pipe 113 is bolted between the mounting pipe 112 and the air pipe 111. A circulating air pump 114 electrically connected to the control system is bolted to the air pipe 111. Both ends of the air pipe 111 are bolted to a gas temperature meter 13 electrically connected to the control system. An insulation layer 14 is wrapped around the air pipe 111 and the connecting pipe 113.

[0043] The control system starts the solenoid valve 95 to open, and the water in the water tower 92 flows into the detection tank 2 through the water inlet pipe 93 under the action of gravity, thereby causing the liquid level in the detection tank 2 to rise to the pool cover frame 3 until the liquid level sensor 19 is triggered. At this time, the control system closes the solenoid valve 95, and the insulated oil pipe 1 is completely immersed in water.

[0044] Subsequently, the control system starts the temperature sensor 7, the electric heating tube 8 and the circulating air pump 114. The electric heating tube 8 continuously heats the air in the insulated oil pipe 1, and the circulating air pump 114 allows the gas to circulate continuously between the two ends of the insulated oil pipe 1 through the air pipe 111 and the connecting pipe 113, thereby making the temperature at various locations in the insulated oil pipe 1 tend to be consistent until the temperature sensor 7 reaches the design temperature value. At this time, the control system controls the electric heating tube 8 to maintain the air in the insulated oil pipe 1 at this temperature.

[0045] At the same time, the control system starts the refrigerator 102, the circulating water pump 103 and the liquid temperature meter 104. The circulating water pump 103 continuously circulates the liquid at both ends of the detection pool 2 through the refrigerator 102. The refrigerator 102 cools the liquid flowing through it. The liquid temperature meter 104 constantly feeds back the temperature of the liquid in the detection pool 2, so that the liquid temperature around the insulated oil pipe 1 always tends to be constant. The control system always records the output power of the electric heating tube 8 during this process.

[0046] Reference Figure 3 A detection component 12 is arranged on the detection pool 2. The detection component 12 is used to detect the temperature of the outer wall of the insulated oil pipe 1 in the detection pool 2. The detection component 12 includes a bottom box 120 that is slidably arranged in the detection pool 2 and has a hollow interior. The bottom box 120 is made of multiple steel plates bolted together and sealed with sealant.

[0047] Reference Figure 3 and Figure 4 A sliding member 15 is arranged on the detection pool 2 to drive the bottom box 120 to slide along the length direction of the insulated oil pipe 1. The sliding member 15 includes a driving shaft 151 rotatably connected to the bottom box 120. The driving shaft 151 rotates through the inner and outer side walls of the bottom box 120. A sealing rubber tube is bonded to the inner side wall of the bottom box 120, and the sealing rubber tube is sleeved on the driving shaft 151. A sliding motor 152 electrically connected to the control system is bolted inside the bottom box 120.

[0048] Reference Figure 4The drive shaft 151 is coaxially bolted to the output shaft of the sliding motor 152. A slide rail 153 with an inverted L-shaped cross section is bolted inside the detection pool 2. The length direction of the slide rail 153 is parallel to the axial direction of the thermal insulation oil pipe 1. A slide plate 154 that slides with the slide rail 153 is bolted to the bottom box 120. A rack 155 is bolted inside the detection pool 2 and along the length direction of the slide rail 153. A gear 156 that meshes with the rack 155 is bolted to the drive shaft 151.

[0049] Reference Figure 3 and Figure 4 A first detection seat 121 and a second detection seat 122 with the same structure are arranged on the top of the bottom box 120. The first detection seat 121 is bolted to the top of the bottom box 120, and the first detection seat 121 is hinged on the second detection seat 122. A sealing rubber gasket 123 is arranged between the first detection seat 121 and the second detection seat 122. The sealing rubber gasket 123 can be made of rubber material. The insulated oil pipe 1 is located between the first detection seat 121 and the second detection seat 122.

[0050] Reference Figure 3 and Figure 4 The first detection seat 121 and the second detection seat 122 are jointly provided with a through groove 124 for placing the insulated oil pipe 1. The first detection seat 121 is provided with sealing bags 125 on both sides of the axial direction of the insulated oil pipe 1. The sealing bags 125 can be made of rubber material. The first detection seat 121 is provided with a receiving groove 126 with a C-shaped cross-section and connected to the through groove 124. The sealing bag 125 is placed in the receiving groove 126.

[0051] Reference Figure 3 and Figure 4 The sealing bag 125 is used to abut the outer wall of the insulated oil pipe 1. The first detection seat 121 between the two accommodating grooves 126 is provided with a placement groove 127 connected to the through groove 124. The placement groove 127 is bolted with an oil cylinder 128 electrically connected to the control system. The piston rod of the oil cylinder 128 is bolted with a temperature probe 129 electrically connected to the control system. The temperature probe 129 is used to be attached to the outer wall of the insulated oil pipe 1.

[0052] Reference Figure 1 、 Figure 2 and Figure 4 The ratio of the distance between the first detection seat 121 and the length of the insulated oil pipe 1 along the axial direction is 1:20, and a pressure supply part 16 for punching the sealing bag 125 is arranged on the bottom box 120.

[0053] Reference Figure 4The pressure supply component 16 includes an oil pump 161 and an oil tank 162 bolted to the bottom box 120 . The oil inlet end of the oil pump 161 is connected to the oil tank 162 , and a pressure-resistant hose 163 is connected between the oil outlet end of the oil pump 161 and the sealing bag 125 .

[0054] After the insulated oil pipe 1 is hoisted on the detection pool 2, the insulated oil pipe 1 is also stuck in the through groove 124 on the first detection seat 121. Then the worker rotates the second detection seat 122 so that the insulated oil pipe 1 is buckled by the through groove 124 on the second detection seat 122 and the through groove 124 on the first detection seat 121. Then the worker fixes the second detection seat 122 to the first detection seat 121 with bolts.

[0055] Subsequently, the control system starts the oil pump 161, and the oil pump 161 draws the hydraulic oil in the oil tank 162 into the sealing bag 125 through the pressure-resistant hose 163. The pressure in the sealing bag 125 continues to increase until the deformed sealing bag 125 abuts against the outer wall of the insulated oil pipe 1. Then, the control system starts the oil cylinder 128, and the piston rod of the oil cylinder 128 drives the temperature probe 129 to stick to the outer wall of the insulated oil pipe 1. At this time, the mounting groove 127 where the temperature probe 129 is located is completely sealed.

[0056] When water is injected into the pool cover frame 3, since the length of the insulating oil pipe 1 is much longer than the distance between the two sealing bags 125, and the thermal conductivity of the insulating oil pipe 1 is better, the temperature of the outer wall of the insulating oil pipe 1 detected by the temperature probe 129 at this time is close to the critical temperature of heat transfer when the outer wall of the insulating oil pipe 1 contacts the liquid. The temperature probe 129 feeds back the temperature here to the control system.

[0057] Then, the control system starts the sliding motor 152, and the output shaft of the sliding motor 152 drives the gear 156 to rotate through the drive shaft 151. The reaction force between the rotating gear 156 and the rack 155 causes the bottom box 120 to slide a certain distance along the length direction of the slide rail 153. At this time, the temperature probe 129 feeds back the temperature of the outer wall of the insulated oil pipe 1 at this location to the control system.

[0058] Since the space in the placement groove 127 is relatively small, the heat-insulating oil pipe 1 is less affected by the temperature in the placement groove 127 , thereby accurately detecting the heat-insulating effect of the heat-insulating oil pipe 1 during actual use.

[0059] The implementation principle of Example 1 is: the worker first uses the lifting equipment to lift the insulated oil pipe 1 on the slot 4 of the detection pool 2. At this time, the insulated oil pipe 1 will be pressed tightly against the sealing strip 5 at the slot 4 of the detection pool 2. At the same time, the insulated oil pipe 1 is also stuck on the through groove 124 on the first detection seat 121. Then the worker rotates the second detection seat 122 so that the insulated oil pipe 1 is buckled by the through groove 124 on the second detection seat 122 and the through groove 124 on the first detection seat 121.

[0060] The worker fixes the second detection seat 122 on the first detection seat 121 with bolts. Then, the control system starts the oil pump 161. The oil pump 161 pumps the hydraulic oil in the oil tank 162 into the sealing bag 125 through the pressure-resistant hose 163. The pressure in the sealing bag 125 continues to increase until the deformed sealing bag 125 abuts against the outer wall of the insulated oil pipe 1. At this time, the placement groove 127 where the temperature probe 129 is located is completely sealed.

[0061] Then, the control system starts the oil cylinder 128, and the piston rod of the oil cylinder 128 drives the temperature probe 129 to stick to the outer wall of the insulated oil pipe 1. Then, the pool cover frame 3 is hoisted on the detection pool 2 through the hoisting equipment, and the pool cover frame 3 is fixed to the detection pool 2 by bolts, and then the end plate cover 6 is bolted and fixed to the end of the insulated oil pipe 1.

[0062] The control system starts the solenoid valve 95 to open, and the water in the water tower 92 flows into the detection tank 2 through the water inlet pipe 93 under the action of gravity, thereby causing the liquid level in the detection tank 2 to rise to the pool cover frame 3 until the liquid level sensor 19 is triggered. At this time, the control system closes the solenoid valve 95, and the insulated oil pipe 1 is completely immersed in water.

[0063] Subsequently, the control system starts the temperature sensor 7, the electric heating tube 8 and the circulating air pump 114. The electric heating tube 8 continuously heats the air in the insulated oil pipe 1, and the circulating air pump 114 allows the gas to circulate continuously between the two ends of the insulated oil pipe 1 through the air pipe 111 and the connecting pipe 113, thereby making the temperature at various locations in the insulated oil pipe 1 tend to be consistent until the temperature sensor 7 reaches the design temperature value. At this time, the control system controls the electric heating tube 8 to maintain the air in the insulated oil pipe 1 at this temperature.

[0064] At the same time, the control system starts the refrigerator 102, the circulating water pump 103 and the liquid temperature meter 104. The circulating water pump 103 continuously circulates the liquid at both ends of the detection pool 2 through the refrigerator 102. The refrigerator 102 cools the liquid flowing through it. The liquid temperature meter 104 constantly feeds back the temperature of the liquid in the detection pool 2, so that the liquid temperature around the insulated oil pipe 1 always tends to be constant. The control system always records the output power of the electric heating tube 8 during this process.

[0065] Since the length of the insulated oil pipe 1 is much longer than the distance between the two sealing bags 125, and the thermal conductivity of the insulated oil pipe 1 is good, the temperature of the outer wall of the insulated oil pipe 1 detected by the temperature probe 129 at this time is close to the critical temperature of heat transfer when the outer wall of the insulated oil pipe 1 contacts the liquid. The temperature probe 129 feeds back the temperature here to the control system.

[0066] Then, the control system starts the sliding motor 152, and the output shaft of the sliding motor 152 drives the gear 156 to rotate through the drive shaft 151. The reaction force between the rotating gear 156 and the rack 155 causes the bottom box 120 to slide a certain distance along the length direction of the slide rail 153. At this time, the temperature probe 129 feeds back the temperature of the outer wall of the insulated oil pipe 1 at this location to the control system.

[0067] Since the space in the placement groove 127 is relatively small, the heat-insulating oil pipe 1 is less affected by the temperature in the placement groove 127 , thereby accurately detecting the heat-insulating effect of the heat-insulating oil pipe 1 during actual use.

[0068] Example 2 Example 2 of the present application discloses a method for using a device for detecting the thermal insulation performance of an insulated oil pipe, comprising the following steps: S1. First, use the lifting equipment to hoist the insulated oil pipe 1 onto the slot 4 of the detection tank 2. Then, the worker rotates the second detection seat 122 and fixes the second detection seat 122 to the first detection seat 121 with bolts. Then, use the lifting equipment again to hoist the pool cover frame 3 onto the detection tank 2 and fix it with bolts. S2. The control system starts the oil pump 161. The oil pump 161 injects hydraulic oil into the sealing bag 125, causing the sealing bag 125 to deform and abut against the outer wall of the insulating oil pipe 1. S3. The control system starts the oil cylinder 128. The piston rod of the oil cylinder 128 drives the temperature probe 129 to stick to the outer wall of the heat-insulated oil pipe 1. S4. Workers install the end plate covers 6 and connecting pipes 113 at both ends of the heat-insulating oil pipe 1; S5. The control system starts the solenoid valve 95 and opens it. The water in the water tower 92 flows into the detection tank 2 through the water inlet pipe 93 until the liquid level sensor 19 is triggered. At this time, the control system closes the solenoid valve 95 and the insulated oil pipe 1 is completely immersed in water. S6. The control system starts the temperature sensor 7, the electric heating tube 8, and the circulating air pump 114. The electric heating tube 8 continuously heats the air in the insulated oil pipe 1, and the circulating air pump 114 continuously circulates the gas in the insulated oil pipe 1 until the temperature sensor 7 reaches the design temperature value. S7: At this time, the control system starts the refrigerator 102, the circulating water pump 103 and the liquid temperature meter 104. The circulating water pump 103 and the refrigerator 102 maintain the water temperature in the detection pool 2 constant. S8, the control system controls the electric heating tube 8 to maintain the air in the insulated oil pipe 1 at the designed temperature for a period of time, and the control system feedbacks the output power of the electric heating tube 8 and the temperature value fed back by the temperature probe 129 during this process; S9. The control system starts the sliding motor 152, and the bottom box 120 slides a distance along the length direction of the slide rail 153. At this time, the temperature probe 129 feeds back the temperature of the outer wall of the insulated oil pipe 1 at this location to the control system; S10, the control system feeds back the temperature values of the temperature probe 129 at different positions of the insulated oil pipe 1, and evaluates the insulation effect of the insulated oil pipe 1 in combination with the output power of the electric heating pipe 8 during the detection process.

[0069] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for detecting the thermal insulation performance of an insulated oil pipe, characterized by: The invention comprises a detection pool (2) which is hollow inside and open at the top, the open end of the detection pool (2) is detachably provided with a pool cover frame (3) which is hollow inside and open at both ends vertically, an insulated oil pipe (1) is placed between the detection pool (2) and the pool cover frame (3), the detection pool (2) and the pool cover frame (3) are both provided with a slot (4) for placing the insulated oil pipe (1), sealing strips (5) are provided between the detection pool (2) and the pool cover frame (3), between the detection pool (2) and the insulated oil pipe (1), and between the pool cover frame (3) and the insulated oil pipe (1), both ends of the insulated oil pipe (1) are detachably provided with end plate covers (6), the end plate covers (6) are provided with a temperature sensor (7) and an electric heating pipe (8), the The temperature sensor (7) and the electric heating tube (8) are both electrically connected to a control system. The heating end of the electric heating tube (8) and the sensing end of the temperature sensor (7) are both used to be placed in the insulated oil pipe (1). The detection pool (2) is provided with a liquid level adjustment component (9), a liquid constant temperature component (10), a gas circulation component (11) and a detection assembly (12). The liquid level adjustment component (9) is used to adjust the height of the liquid level in the detection pool (2). The liquid constant temperature component (10) is used to stabilize the liquid temperature in the detection pool (2). The gas circulation component (11) is used to circulate the air in the insulated oil pipe (1). The detection assembly (12) is used to detect the temperature of the outer wall of the insulated oil pipe (1) in the detection pool (2).

2. The device for detecting the thermal insulation performance of an insulated oil pipe according to claim 1, characterized in that: The liquid level adjustment member (9) comprises a support frame (91) arranged beside the detection pool (2); a water tower (92) is provided on the support frame (91); the height of the water tower (92) is higher than the height of the pool cover frame (3) placed on the detection pool (2); a water inlet pipe (93) is connected between the bottom of the water tower (92) and the bottom of the detection pool (2); a water return pipe (94) is connected between the top of the water tower (92) and the bottom of the detection pool (2); a solenoid valve (95) electrically connected to a control system is provided on the water inlet pipe (93); and a reflux pump (96) electrically connected to the control system is provided on the water return pipe (94).

3. The device for detecting the thermal insulation performance of an insulated oil pipe according to claim 2, characterized in that: The liquid thermostat (10) comprises a refrigeration pipe (101) connected to the detection pool (2) at both ends along the length direction of the heat-insulating oil pipe (1); a refrigerator (102), a circulating water pump (103) and a liquid temperature meter (104) are provided on the refrigeration pipe (101); the refrigerator (102), the circulating water pump (103) and the liquid temperature meter (104) are all electrically connected to a control system.

4. The device for detecting thermal insulation performance of an insulated oil pipe according to claim 3, characterized in that: The gas circulation component (11) comprises an air pipe (111) arranged on the detection pool (2); a mounting pipe (112) for communicating with the heat-insulating oil pipe (1) is arranged on the end plate cover (6); a connecting pipe (113) is detachably arranged between the mounting pipe (112) and the air pipe (111); and a circulating air pump (114) electrically connected to a control system is arranged on the air pipe (111).

5. The device for detecting thermal insulation performance of an insulated oil pipe according to claim 4, characterized in that: Both ends of the gas pipe (111) are provided with a gas temperature meter (13) electrically connected to a control system, and both the gas pipe (111) and the connecting pipe (113) are provided with a heat-insulating layer (14).

6. The device for detecting thermal insulation performance of an insulated oil pipe according to claim 4, characterized in that: The detection assembly (12) includes a bottom box (120) which is slidably arranged in the detection pool (2) and is hollow inside. The detection pool (2) is provided with a sliding member (15) which drives the bottom box (120) to slide along the length direction of the heat-insulating oil pipe (1). The bottom box (120) is provided with a first detection seat (121) and a second detection seat (122) with the same structure. The first detection seat (121) is hinged on the second detection seat (122). A sealing rubber pad (123) is provided between the first detection seat (121) and the second detection seat (122). The heat-insulating oil pipe (1) is located between the first detection seat (121) and the second detection seat (122). The first detection seat (121) and the second detection seat (122) are both provided with a through groove (124) for placing the heat-insulating oil pipe (1). The first detection seat (121) is hinged along the axis of the heat-insulating oil pipe (1). A sealing bag (125) is provided on both sides of the first detection seat (121), a receiving groove (126) with a C-shaped cross section and connected to the through groove (124), the sealing bag (125) is placed in the receiving groove (126), the sealing bag (125) is used to abut the outer wall of the heat-insulating oil pipe (1), the bottom box (120) is provided with a pressure supply part (16) for punching into the sealing bag (125), the first detection seat (121) between the two receiving grooves (126) is provided with a placement groove (127) connected to the through groove (124), the placement groove (127) is provided with an oil cylinder (128) electrically connected to the control system, the piston rod of the oil cylinder (128) is provided with a temperature probe (129) electrically connected to the control system, and the temperature probe (129) is used to stick to the outer wall of the heat-insulating oil pipe (1).

7. The device for detecting the thermal insulation performance of an insulated oil pipe according to claim 6, characterized in that: The sliding member (15) includes a driving shaft (151) rotatably arranged on the bottom box (120), the driving shaft (151) rotates through the inner and outer side walls of the bottom box (120), a sliding motor (152) electrically connected to the control system is arranged in the bottom box (120), the driving shaft (151) is coaxially arranged on the output shaft of the sliding motor (152), a sliding rail (153) is arranged in the detection pool (2), the length direction of the sliding rail (153) is parallel to the axial direction of the insulated oil pipe (1), a sliding plate (154) slidingly matched with the sliding rail (153) is arranged on the bottom box (120), a rack (155) is arranged in the detection pool (2) and along the length direction of the sliding rail (153), and a gear (156) meshing with the rack (155) is arranged on the driving shaft (151).

8. The device for detecting the thermal insulation performance of an insulated oil pipe according to claim 6, characterized in that: The pressure supply component (16) includes an oil pump (161) and an oil tank (162) arranged in the bottom box (120); the oil inlet end of the oil pump (161) is connected to the oil tank (162); and a pressure-resistant hose (163) is connected between the oil outlet end of the oil pump (161) and the sealing bag (125).

9. The device for detecting thermal insulation performance of an insulated oil pipe according to claim 6, characterized in that: The ratio of the distance between the two sides of the first detection seat (121) along the axial direction of the heat-insulating oil pipe (1) to the length of the heat-insulating oil pipe (1) is 1:

20.

10. A method for using the device for detecting the thermal insulation performance of an insulated oil pipe according to any one of claims 1 to 9, characterized in that: The steps include: S1. First, the heat-insulating oil pipe (1) is hoisted onto the clamping groove (4) of the detection pool (2) by means of a hoisting device, and then the pool cover frame (3) is hoisted onto the detection pool (2) so that the heat-insulating oil pipe (1) is clamped by the clamping groove (4) on the pool cover frame (3), and finally the pool cover frame (3) is fixed onto the detection pool (2); S2, raising the liquid level in the detection pool (2) to the level of the pool cover frame (3) through the liquid level adjustment member (9), thereby completely immersing the heat-insulated oil pipe (1) in the liquid; S3, maintaining the temperature of the liquid in the detection pool (2) constant through the liquid thermostat (10); S4, the control system starts the temperature sensor (7) and the electric heating pipe (8), the electric heating pipe (8) works to heat the air in the insulated oil pipe (1), the temperature sensor (7) constantly feeds back the temperature of the air in the insulated oil pipe (1), and at the same time the gas circulation component (11) causes the air in the insulated oil pipe (1) to circulate continuously; S5, the control system maintains the air in the heat-insulated oil pipe (1) at a design temperature value through the temperature sensor (7) and the electric heating pipe (8), and at the same time, the detection component (12) detects the temperature of the outer wall of the heat-insulated oil pipe (1); S6. After a period of time, the control system feeds back the output power of the electric heating pipe (8) during the detection period and the temperature value of the outer wall of the insulated oil pipe (1) fed back by the detection component (12).

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