Non-metal oil pipe heat preservation device and using method

Abstract

The invention provides a non-metal oil pipe heat preservation device and a using method. The device at least comprises a first heater (1), an outer box body (2), an inner box body (3), a high-pressure pipe joint (4), a left cover plate (7), a right cover plate (8), an electric control cabinet (9), a transmission system (10), a first circulating pump (11), a second circulating pump (12), a second heater (13), a temperature sensor (18), a liquid level sensor (19) and a drain valve (21). The invention further relates to a using method of the device. Through ingenious structural design, deionized water is added into the box body, and the anti-corrosion grades of the inner box body, the circulating pump pipeline and the heater are improved, so that the influence of factors such as scale or other impurities on the stability of the heat preservation device during long-term test is effectively avoided. The parts are flexible in design, a heat preservation device with a larger volume can be matched by changing the number of the heaters, the temperature sensors and the circulating pumps and the positions of water outlets of the circulating pumps, and it is guaranteed that the temperature in the box body is uniform and free of deviation and the heating efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive detection of the service life of non-metallic oil pipes, and in particular relates to a non-metallic oil pipe insulation device and a use method thereof. Background Art

[0002] The comprehensive service life testing technology for non-metallic oil pipes uses mechanical devices to simulate the high temperature and high pressure environment of non-metallic oil pipes underground, and verifies the service life of non-metallic oil pipes in actual service through long-term hydrostatic pressure and high temperature environment testing. Among them, the high temperature environment test uses water as the conduction medium through the insulation device to heat the non-metallic pipes under internal pressure (hydrostatic pressure test) through heat conduction, thereby simulating the geothermal environment.

[0003] Non-metallic petroleum pipes have been used for hydrostatic pressure testing for a long time. Existing devices or equipment cannot ensure the stability of their environment, which seriously affects the test results. Based on the current situation, the present invention provides a device that can provide a long-term stable target ambient temperature to simulate the geothermal temperature of the non-metallic petroleum pipe under actual service conditions. Summary of the invention

[0004] The purpose of the present invention is to provide a non-metallic oil pipe insulation device and a use method thereof.

[0005] The present invention is achieved through the following technical solutions: The present invention relates to a non-metallic oil pipe insulation device, which at least comprises: a first heater 1, an outer box 2, an inner box 3, a high-pressure pipe joint 4, a left cover plate 7, a right cover plate 8, an electric control cabinet 9, a transmission system 10, a first circulating pump 11, a second circulating pump 12, a second heater 13, a temperature sensor 18, a liquid level sensor 19, and a drain valve 21; The inner box body 3 is arranged inside the outer box body 2; An inner box support beam 23 is installed at the bottom of the inner box 3; The high-pressure pipe joint 4 and the lifting ring 6 are respectively arranged on the side of the inner box body 3, and the high-pressure pipe joint 4 passes through the side of the outer box body 2; The first heater 1, the second heater 13, the temperature sensor 18, the liquid level sensor 19, and the drain valve 21 are all arranged in the inner box 3, and the inner box 3 is composed of a channel steel welded frame, and the interior of the frame is sealed by a steel plate; The transmission system 10, the first circulation pump 11, and the second circulation pump 12 are all arranged in the gap between the inner box body 3 and the outer box body 2; The four sides of the outer box body 2 are provided with openable and closable stainless steel covers 20, and the outer box body 2 is composed of a channel steel welded frame; The left cover plate 7 and the right cover plate 8 are hingedly connected and arranged on the top end of the outer box body 2 .

[0006] Preferably, the transmission system 10 comprises: a motor 1001, a reducer 1002, a coupling 1003, a transmission shaft 1004, a bearing seat 1005, a chain 1006, a guide groove 1007, a guide wheel device 1008, a traction device 1009, and a driven shaft 1010; The traction device 1009 is a hinged connecting rod, one end of which is connected to the chain 1006 and the other end is connected to the left cover plate 7; The guide wheel device 1008 is a hinged connecting rod with a roller, one end of which is connected to the left cover plate 7 and the end with the roller is arranged in the guide groove 1007.

[0007] Preferably, the number of the guide grooves 1007 is two, which are symmetrically arranged in the cavity between the outer box body 2 and the inner box body 3 .

[0008] Preferably, a panel 5 is provided on the top between the outer box body 2 and the inner box body 3 for connection.

[0009] Preferably, the motor 1001 and the reducer 1002 start the transmission shaft 1004 and the chain 1006 to move through the coupling 1003 , thereby driving the traction device 1009 to move, thereby driving the guide wheel device 1008 to slide in the guide groove 1007 .

[0010] Preferably, the first heater 1 and the second heater 13 are 304 stainless steel tubular heaters, and a heater cover plate 22 is installed above the first heater 1 and the second heater 13 .

[0011] Preferably, one end of the right cover plate 8 is fixedly connected to the outer box body 2 , and the other end is hingedly connected to the left cover plate 7 .

[0012] Preferably, one end of the left cover plate 7 is hinged to the right cover plate 8 , and the other end is connected to the transmission system 10 .

[0013] Preferably, the other end of the left cover plate 7 is respectively connected to the guide wheel device 1008 and the traction device 1009 in the transmission system 10.

[0014] The present invention also relates to a method for using the aforementioned non-metallic oil pipe insulation device, comprising the following steps: Step 1, open the left cover plate 7 and the right cover plate 8 through the transmission system 10; Step 2, connect the non-metallic tube filled with the test medium to the high-pressure pipe joint 4 on the inner box 3 through a high-temperature and high-pressure hose, place the non-metallic tube horizontally on the inner box support beam 23, and hang the stainless steel chain set on the non-metallic tube head on the lifting ring 6; Step 3, filling the inner box 3 with deionized water and setting the heating target temperature; Step 4, turn on the first heater 1, the second heater 13, the first circulation pump 11, the second circulation pump 12, and close the left cover plate 7 and the right cover plate 8; Step 5, heating to the target temperature and then keeping the temperature, starting to pressurize the non-metallic pipe through the high-pressure pipe joint 4 and maintaining the target pressure; Step 6, after the experiment is over, turn off the first heater 1, the second heater 13, the first circulation pump 11, the second circulation pump 12, and open the left cover plate 7 and the right cover plate 8; Step 7, disconnect the high temperature and high pressure hose, remove the stainless steel chain hanging on the ring 6, and take out the non-metallic tube.

[0015] The present invention has the following advantages: (1) The ingenious structural design of the present invention can meet the purpose of providing a long-term constant target ambient temperature for the non-metallic petroleum pipe undergoing hydrostatic pressure testing.

[0016] (2) The present invention can effectively avoid the influence of factors such as scale or other impurities on the stability of the insulation device during long-term testing by adding deionized water inside the box and improving the corrosion resistance of the inner box, circulating pump pipeline, and heater.

[0017] (3) The components of the present invention are flexibly designed, and can be matched with a larger volume insulation device by changing the number of heaters, temperature sensors, circulation pumps, and the location of the water outlet of the circulation pump, thereby ensuring uniform temperature inside the box without deviation and heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the non-metallic oil pipe insulation device of the present invention; Figure 2 It is a front view of the non-metallic oil pipe insulation device of the present invention; Figure 3 It is a left side view of the non-metallic oil pipe insulation device of the present invention; Figure 4 is a top view of the non-metallic oil pipe insulation device of the present invention; Figure 5 It is a right side view of the non-metallic oil pipe insulation device of the present invention; Figure 6 It is a right side cross-sectional view of the non-metallic oil pipe insulation device of the present invention; Figure 7 It is a partial enlarged view of the non-metallic oil pipe insulation device of the present invention; The accompanying drawings are marked with: 1 is the first heater, 2 is the outer box, 3 is the inner box, 4 is the high-pressure pipe joint, 5 is the panel, 6 is the lifting ring, 7 is the left cover, 8 is the right cover, 9 is the electric control cabinet, 10 is the transmission system, 1001 is the motor, 1002 is the reducer, 1003 is the coupling, 1004 is the transmission shaft, 1005 is the bearing seat, 1006 is the chain, 1007 is the guide groove, 1008 is the guide wheel device, 1009 is the traction device, 1010 is the driven shaft, 11 is the first circulating pump, 12 is the second circulating pump, 13 is the second heater, 14 is the water inlet of the second circulating pump, 15 is the water outlet of the second circulating pump, 16 is the water inlet of the first circulating pump, 17 is the water outlet of the first circulating pump, 18 is the temperature sensor, 19 is the liquid level sensor, 20 is the stainless steel cover, 21 is the drain valve, 22 is the heater cover, and 23 is the inner box support beam. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments. Example

[0020] This embodiment relates to a non-metallic oil pipe insulation device. Figure 1-Figure 7 As shown, it at least includes: a first heater 1, an outer box body 2, an inner box body 3, a high-pressure pipe joint 4, a left cover plate 7, a right cover plate 8, an electric control cabinet 9, a transmission system 10, a first circulating pump 11, a second circulating pump 12, a second heater 13, a temperature sensor 18, a liquid level sensor 19, a drain valve 21, a second circulating pump water inlet 14, a second circulating pump water outlet 15, a first circulating pump water inlet 16, and a first circulating pump water outlet 17; The inner box body 3 is arranged inside the outer box body 2; An inner box support beam 23 is installed at the bottom of the inner box 3; The high-pressure pipe joint 4 and the lifting ring 6 are respectively arranged on the side of the inner box body 3, and the high-pressure pipe joint 4 passes through the side of the outer box body 2; The first heater 1, the second heater 13, the temperature sensor 18, the liquid level sensor 19, and the drain valve 21 are all arranged in the inner box body 3. The inner box body 3 has a channel steel welded frame, and the steel plate inside the frame is sealed; the inner box body 3 is also provided with a second heater water inlet, a second heater water outlet, a first heater water inlet, a first heater water outlet, and a drain valve 21.

[0021] The transmission system 10, the first circulation pump 11, and the second circulation pump 12 are all arranged in the gap between the inner box body 3 and the outer box body 2; the gap between the inner box body 3 and the outer box body 2 is also provided with a heat-insulating material, which is a composite silicate foam board; The four sides of the outer box body 2 are provided with openable and closable stainless steel covers 20, and the outer box body 2 is a channel steel welded frame; The left cover plate 7 and the right cover plate 8 are hingedly connected and arranged on the top end of the outer box body 2 .

[0022] The transmission system 10 includes: a motor 1001, a reducer 1002, a coupling 1003, a transmission shaft 1004, a bearing seat 1005, a chain 1006, a guide groove 1007, a guide wheel device 1008, a traction device 1009, and a driven shaft 1010; The traction device 1009 is a hinged connecting rod, one end of which is connected to the chain 1006 and the other end is connected to the left cover plate 7; The guide wheel device 1008 is a hinged connecting rod with a roller, one end of which is connected to the left cover plate 7 and the end with the roller is arranged in the guide groove 1007.

[0023] There are two guide grooves 1007 symmetrically disposed in the cavity between the outer box body 2 and the inner box body 3 .

[0024] A panel 5 is provided on the top between the outer box body 2 and the inner box body 3 for connection.

[0025] The motor 1001 and the reducer 1002 start the transmission shaft 1004 and the chain 1006 to move through the coupling 1003, and drive the traction device 1009 to move, thereby driving the guide wheel device 1008 to slide in the guide groove 1007.

[0026] The first heater 1 and the second heater 13 are 304 stainless steel tubular heaters, and heater covers 22 are installed above the first heater 1 and the second heater 13 .

[0027] One end of the right cover plate 8 is fixedly connected to the outer box body 2 , and the other end is hingedly connected to the left cover plate 7 .

[0028] One end of the left cover plate 7 is hinged to the right cover plate 8 , and the other end is connected to the transmission system 10 .

[0029] The other end of the left cover plate 7 is respectively connected to the guide wheel device 1008 and the traction device 1009 in the transmission system 10.

[0030] This embodiment also relates to a method for using the aforementioned non-metallic oil pipe insulation device, comprising the following steps: Step 1, open the left cover plate 7 and the right cover plate 8 through the transmission system 10; Step 2, connect the non-metallic tube filled with the test medium to the high-pressure pipe joint 4 on the inner box 3 through a high-temperature and high-pressure hose, place the non-metallic tube horizontally on the inner box support beam 23, and hang the stainless steel chain set on the non-metallic tube head on the lifting ring 6; Step 3, filling the inner box 3 with deionized water and setting the heating target temperature; Step 4, turn on the first heater 1, the second heater 13, the first circulation pump 11, the second circulation pump 12, and close the left cover plate 7 and the right cover plate 8; Step 5, heating to the target temperature and then keeping the temperature, starting to pressurize the non-metallic pipe through the high-pressure pipe joint 4 and maintaining the target pressure; Step 6, after the experiment is over, turn off the first heater 1, the second heater 13, the first circulation pump 11, the second circulation pump 12, and open the left cover plate 7 and the right cover plate 8; Step 7, disconnect the high temperature and high pressure hose, remove the stainless steel chain hanging on the ring 6, and take out the non-metallic tube.

[0031] The present invention uses an ingenious structural design, adds deionized water inside the box, and improves the anti-corrosion level of the inner box, circulating pump pipeline, and heater to effectively avoid the influence of factors such as scale or other impurities on the stability of the insulation device during long-term testing. The component design of the present invention is flexible, and a larger volume insulation device can be matched by changing the number of heaters, temperature sensors, circulating pumps, and the position of the outlet of the circulating pump, ensuring uniform temperature inside the box without deviation and heating efficiency.

[0032] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which will not affect the essence of the present invention.

Claims

1. A non-metallic oil pipe insulation device, characterized in that: At least: A first heater (1), an outer box (2), an inner box (3), a high-pressure pipe joint (4), a left cover plate (7), a right cover plate (8), an electric control cabinet (9), a transmission system (10), a first circulation pump (11), a second circulation pump (12), a second heater (13), a temperature sensor (18), a liquid level sensor (19), and a drain valve (21); The inner box body (3) is arranged inside the outer box body (2); An inner box support beam (23) is installed at the bottom of the inner box (3); The high-pressure pipe joint (4) and the lifting ring (6) are respectively arranged on the side of the inner box body (3), and the high-pressure pipe joint (4) passes through the side of the outer box body (2); The first heater (1), the second heater (13), the temperature sensor (18), the liquid level sensor (19), and the drain valve (21) are all arranged in the inner box (3); The transmission system (10), the first circulation pump (11), and the second circulation pump (12) are all arranged in the gap between the inner box body (3) and the outer box body (2); The four sides of the outer box body (2) are provided with openable and closable stainless steel covers (20); The left cover plate (7) and the right cover plate (8) are hingedly connected and arranged at the top end of the outer box body (2).

2. The non-metallic oil pipe insulation device according to claim 1, characterized in that: The transmission system (10) comprises: a motor (1001), a reducer (1002), a coupling (1003), a transmission shaft (1004), a bearing seat (1005), a chain (1006), a guide groove (1007), a guide wheel device (1008), a traction device (1009), and a driven shaft (1010); The traction device (1009) is a hinged connecting rod, one end of which is connected to the chain (1006) and the other end of which is connected to the left cover plate (7); The guide wheel device (1008) is a hinged connecting rod with a roller, one end of which is connected to the left cover plate (7) and the end with the roller is arranged in the guide groove (1007).

3. The non-metallic oil pipe insulation device according to claim 2, characterized in that: The number of the guide grooves (1007) is two, which are symmetrically arranged in the cavity between the outer box body (2) and the inner box body (3).

4. The non-metallic oil pipe insulation device according to claim 1, characterized in that: A panel (5) is provided at the top between the outer box body (2) and the inner box body (3) for connection.

5. The non-metallic oil pipe insulation device according to claim 2, characterized in that: The motor (1001) and the reducer (1002) start the transmission shaft (1004) and the chain (1006) to move via the coupling (1003), thereby driving the traction device (1009) to move, thereby driving the guide wheel device (1008) to slide in the guide groove (1007).

6. The non-metallic oil pipe insulation device according to claim 1, characterized in that: The first heater (1) and the second heater (13) are 304 stainless steel tubular heaters, and a heater cover plate (22) is installed above the first heater (1) and the second heater (13).

7. The non-metallic oil pipe insulation device according to claim 1, characterized in that: One end of the right cover plate (8) is fixedly connected to the outer box body (2), and the other end is hingedly connected to the left cover plate (7).

8. The non-metallic oil pipe insulation device according to claim 1, characterized in that: One end of the left cover plate (7) is hingedly connected to the right cover plate (8), and the other end is connected to the transmission system (10).

9. The non-metallic oil pipe insulation device according to claim 8, characterized in that: The other end of the left cover plate (7) is respectively connected to a guide wheel device (1008) and a traction device (1009) in the transmission system (10).

10. The method for using the non-metallic oil pipe insulation device according to claim 1, characterized in that: The following steps are involved: Step 1, opening the left cover plate (7) and the right cover plate (8) through the transmission system (10); Step 2, connect the non-metallic pipe filled with the test medium to the high-pressure pipe joint (4) on the inner box (3) through a high-temperature and high-pressure hose, place the non-metallic pipe horizontally on the inner box support beam (23), and hang the stainless steel chain provided on the non-metallic pipe head on the lifting ring (6); Step 3, filling the inner box (3) with deionized water and setting a heating target temperature; Step 4, turning on the first heater (1), the second heater (13), the first circulation pump (11), the second circulation pump (12), and closing the left cover plate (7) and the right cover plate (8); Step 5, heating to the target temperature and then keeping the temperature, starting to pressurize the non-metallic pipe through the high-pressure pipe joint (4) and maintaining the target pressure; Step 6, after the experiment is over, turn off the first heater (1), the second heater (13), the first circulation pump (11), and the second circulation pump (12), and open the left cover (7) and the right cover (8); Step 7, disconnect the high temperature and high pressure hose, remove the stainless steel chain hanging on the ring (6), and take out the non-metallic tube.

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