Compression resistance test equipment for heating pipe

Abstract

The invention relates to the technical field of heating pipe detection, in particular to heating pipe compression resistance testing equipment which comprises a base, an oil cylinder fixedly connected to the upper surface of the base, a connecting piece fixedly connected to the top of the oil cylinder, a first piston fixedly connected to the connecting piece, two arc-shaped shells fixedly connected to the upper surface of the base, and arc-shaped cylinder bodies fixedly connected to the interiors of the shells. The first piston is matched with the cylinder body, a plurality of pressurizing chambers are fixedly connected to the outer wall of the cylinder body from top to bottom, through holes are formed in outer rings of the pressurizing chambers so that the pressurizing chambers can be communicated with the cylinder body, and annular air bags are fixedly connected to inner rings of the pressurizing chambers. The device is used for simulating crude oil hydraulic pressure in a pipeline to apply external force in different directions to a heating pipe. The depth of the piston in the cylinder body is increased, so that the internal pressure of each annular air bag is sequentially increased from top to bottom, the situation that the hydraulic pressure borne by crude oil is larger along with the increase of the depth is simulated, and the actual situation is better met.

Description

Technical Field

[0001] The present invention relates to the technical field of heating tube detection, and in particular to a heating tube pressure resistance testing device. Background Art

[0002] In order to prevent the fluidity of crude oil from decreasing in low temperature environments and thus affecting the oil transportation efficiency of crude oil pipelines, electric heating pipes are generally installed on crude oil pipelines in the prior art to heat the crude oil to prevent the fluidity of crude oil from decreasing.

[0003] Since there is a high pressure inside the pipeline during the transportation of crude oil, the heating pipe needs to be subjected to a pressure test before being installed to the pipeline to ensure that the heating pipe can work normally.

[0004] In the existing technology, pressure testing machines are usually used to test the pressure resistance of heating pipes. Most common pressure testing machines on the market use hydraulic equipment to drive a pressure plate to apply pressure to the test block to detect the pressure resistance. However, when installing a heating pipe in a crude oil pipeline, the heating pipe is usually installed inside the pipeline, and the heating part of the heating pipe is immersed in crude oil for heating. The heating pipe is not only subjected to pressure from all directions, but also the hydraulic pressure of crude oil on the heating pipe is different at different heights. The existing pressure testing machine can only test the pressure resistance in a single direction at a time, which is difficult to meet the actual needs of manufacturers. Therefore, there is an urgent need for a device that can detect the pressure resistance data of the heating pipe in different directions and at different pressures in a single test. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a heating tube pressure test device.

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

[0007] A heating pipe pressure test device is designed, including a base, an oil cylinder is fixedly connected to the upper surface of the base, a connecting piece is fixedly connected to the top of the oil cylinder, a first piston is fixedly connected to the connecting piece, two arc-shaped shells are fixedly connected to the upper surface of the base, an arc-shaped cylinder body is fixedly connected to the inside of the shell, the first piston cooperates with the cylinder body, a plurality of boosting chambers are fixedly connected to the outer wall of the cylinder from top to bottom, a through hole is opened on the outer ring of the boosting chamber to connect the boosting chamber with the cylinder body, an annular airbag is fixedly connected to the inner ring of the boosting chamber, and the annular airbag is connected to the boosting chamber.

[0008] Preferably, a ring is fixedly connected to the top of the shell, and two clamping screws are threadedly engaged on both sides of the ring to clamp and fix the heating tube.

[0009] Preferably, the inner diameter of the annular airbag is larger than the outer diameter of the heating tube.

[0010] Preferably, annular grooves are provided on both the upper and lower sides of the boost chamber, an annular second piston is slidably fitted in the groove, a spring is fixed to the inner wall of the groove, and one end of the spring is connected to the second piston.

[0011] Preferably, a plurality of driving structures are provided on the outer wall of the shell, and the driving structures correspond to the boosting chambers one by one, and are used to drive the second piston in the corresponding boosting chamber to slide in the groove.

[0012] Preferably, the driving structure includes a first screw and a hinged rod, the first screw is rotatably mounted on the outer wall of the supercharging chamber, one end of the first screw is fixedly connected to the first gear, the other end of the first screw extends into the supercharging chamber and is threadedly engaged with a nut seat, one end of the hinged rod is hinged on the nut seat, the other end of the hinged rod is hinged on the second piston, and a driving wheel is rotatably mounted on the outer wall of the outer shell, and the driving wheel cooperates with the first gear to drive the first gear to rotate.

[0013] Preferably, the boost chamber contains an arc-shaped pressure plate, which rests against the inner wall of the annular airbag.

[0014] Preferably, a slot plate is fixedly connected to the outer shell, and a pressure structure is provided in the slot plate to apply horizontal pressure to the pressure plate.

[0015] Preferably, the pressure structure includes a second screw, which is rotatably mounted on the groove plate, one end of the second screw is fixedly connected to a second gear, the other end of the second screw extends to the interior of the boost chamber and is threadedly fitted with a threaded sleeve, the threaded sleeve is fixed to the pressure plate, and a rack is slidably fitted in the groove plate, and the rack matches the second gear.

[0016] Preferably, a guide rod is vertically fixed to the bottom end of the rack, the bottom end of the guide rod passes through the base, an electric cylinder is installed on the bottom surface of the base, and the output end of the electric cylinder is connected to the guide rod.

[0017] The present invention provides a heating tube pressure test device, which has the following beneficial effects:

[0018] 1. This device uses air pressure to expand the annular airbag to apply external forces in different directions to the heating tube, simulating the external forces in different directions exerted on the heating tube by the hydraulic pressure of crude oil in the pipeline; as the depth of the piston in the cylinder increases, the internal pressure of each annular airbag increases from top to bottom, simulating the situation where the hydraulic pressure inside the crude oil increases with the depth, which is more in line with the actual situation.

[0019] 2. This device changes the pressure in the boost chamber as the second piston slides in the groove. This allows test personnel to manually adjust the pressure inside each boost chamber as needed after the first piston stops working during the heating tube pressure test, so as to achieve the purpose of obtaining multiple sets of test data in one test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a heating tube pressure resistance testing device proposed by the present invention.

[0021] Figure 2 This is a front view of a heating tube pressure testing device proposed by the present invention.

[0022] Figure 3 This is a top view of a heating tube pressure test device proposed by the present invention.

[0023] Figure 4 A heating tube pressure test device proposed by the present invention Figure 3 Middle AA section view.

[0024] Figure 5 A heating tube pressure test device proposed by the present invention Figure 4 Enlarged view of point C in the middle.

[0025] Figure 6 A heating tube pressure test device proposed by the present invention Figure 3 Middle BB section.

[0026] Figure 7 This is a schematic diagram of the installation structure of the driving wheel and shell of a heating tube pressure test device proposed by the present invention.

[0027] Figure 8 This is a structural schematic diagram of the cylinder body of a heating tube pressure resistance testing device proposed by the present invention.

[0028] Figure 9 This is a schematic diagram of the structure inside the cylinder of a heating tube pressure test device proposed by the present invention.

[0029] Figure 10 This is a schematic diagram of the structure of the booster chamber of the heating tube pressure resistance testing equipment proposed by the present invention.

[0030] Figure 11 Schematic diagram of the internal structure of the boost chamber of a heating tube pressure test device proposed by the present invention Figure 1 .

[0031] Figure 12 Schematic diagram of the internal structure of the boost chamber of a heating tube pressure test device proposed by the present invention Figure 2 .

[0032] Figure 13 A heating tube pressure test device proposed by the present invention Figure 12 Front view of the middle plenum section.

[0033] In the figure: 1. base; 2. outer shell; 3. cylinder body; 4. booster chamber; 401. through hole; 402. annular airbag; 403. groove; 404. second piston; 405. spring; 406. first gear; 407. first screw; 408. nut seat; 409. hinged rod; 410. pressure plate; 411. threaded sleeve; 412. second screw; 413. second gear; 5. groove plate; 6. rack; 7. guide rod; 8. electric cylinder; 9. driving wheel; 10. oil cylinder; 11. connecting piece; 12. first piston; 13. clamping screw; 14. ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Reference Figures 1-10 A heating tube pressure test device includes a base 1, with a cylinder 10 fixed to its upper surface. A connector 11 is fixed to the top of the cylinder 10, with a first piston 12 fixed to the connector 11. Two arc-shaped shells 2 are fixed to the upper surface of the base 1, with an arc-shaped cylinder body 3 fixed inside the shell 2. The first piston 12 cooperates with the cylinder body 3. Multiple booster chambers 4 are fixed to the outer wall of the cylinder body 3 from top to bottom. Through holes 401 are opened on the outer ring of the booster chamber 4 to connect the booster chamber 4 with the cylinder body 3. An annular airbag 402 is fixed to the inner ring of the booster chamber 4. The inner diameter of the annular airbag 402 is larger than the outer diameter of the heating tube, and the annular airbag 402 is connected to the booster chamber 4. A ring 14 is fixed to the top of the shell 2. Two clamping screws 13 are threaded on both sides of the ring 14 to clamp and fix the heating tube.

[0036] When performing a pressure test on the heating tube, the heating tube is inserted into the annular airbag 402 , and the tester manually rotates the clamping screw 13 to clamp and fix the heating tube so that the heating part at the bottom of the heating tube is stably maintained on the axis of the annular airbag 402 .

[0037] Next, the oil cylinder 10 is started, and the output end of the oil cylinder 10 drives the first piston 12 to move into the cylinder body 3 through the connecting piece 11. As the depth of the first piston 12 inserted into the cylinder body 3 increases, the air pressure in the cylinder body 3 will also increase. Since the boosting chamber 4 is connected to the cylinder body 3 through the through hole 401 opened on the outer wall, the air pressure inside the boosting chamber 4 will also increase. Under the action of pressure, the annular airbag 402 expands toward the heating tube on the axis. The expansion of the annular airbag 402 applies external forces from different directions to the heating tube on the axis to simulate the external forces in different directions applied to the heating tube by the crude oil hydraulic pressure in the pipeline.

[0038] Secondly, as the first piston 12 is inserted deeper into the cylinder 3, the process is as follows:

[0039] The bottom end of the first piston 12 gradually becomes lower than the through hole 401 of the first boosting chamber 4. At this time, the through hole 401 of the first boosting chamber 4 is blocked by the first piston 12. At this time, the pressure inside the first boosting chamber 4 is locked.

[0040] After the internal pressure of the first boosting chamber 4 is locked, the bottom end of the first piston 12 will gradually move toward the second boosting chamber 4. As the first piston 12 moves downward, the internal pressure of the boosting chamber 4 below the first boosting chamber 4 continues to increase until the bottom end of the first piston 12 is lower than the through hole 401 of the second boosting chamber 4. At this time, the pressure inside the second boosting chamber 4 will also be locked, and the pressure inside the second boosting chamber 4 will be greater than the pressure inside the first boosting chamber 4.

[0041] Similarly, as the depth of the first piston 12 inserted into the cylinder 3 increases, the pressure inside each boosting chamber 4 becomes different, and the internal pressure of the boosting chamber 4 increases from top to bottom until the first piston 12 stops moving.

[0042] As the first piston 12 is inserted into the cylinder 3 to an increasing depth, the pressure inside the boosting chamber 4 increases successively, that is, the lower the height, the greater the pressure inside the boosting chamber 4, thereby simulating the situation where the heating pipe is inserted into crude oil and the hydraulic pressure increases with increasing depth.

[0043] like Figure 4-Figure 6 and Figure 11-13 As shown, an annular groove 403 is provided on both the upper and lower sides of the inside of the boost chamber 4, and an annular second piston 404 is slidably fitted in the groove 403. A spring 405 is fixed to the inner wall of the groove 403, and one end of the spring 405 is connected to the second piston 404. A plurality of driving structures are provided on the outer wall of the housing 2. The driving structures correspond to the boost chambers 4 one by one and are used to drive the second piston 404 in the corresponding boost chamber 4 to slide in the groove 403. The driving structure includes a first screw 407 and a hinged rod 409, the first screw 407 is rotatably mounted on the outer wall of the boost chamber 4, one end of the first screw 407 is fixedly connected to the first gear 406, the other end of the first screw 407 extends into the boost chamber 4 and is threadedly engaged with a nut seat 408, one end of the hinged rod 409 is hinged on the nut seat 408, and the other end of the hinged rod 409 is hinged on the second piston 404, and a driving wheel 9 is rotatably mounted on the outer wall of the outer shell 2, and the driving wheel 9 cooperates with the first gear 406 to drive the first gear 406 to rotate.

[0044] The staff drives the driving wheel 9 to rotate, and the rotation of the driving wheel 9 will drive the first gear 406 to rotate, and the rotation of the first gear 406 will drive the first screw 407 to rotate, and the rotation of the first screw 407 will drive the nut seat 408 to move linearly, and the linear movement of the nut seat 408 will drive the second piston 404 to slide in the groove 403 through the hinge rod 409. During the sliding process of the second piston 404 in the groove 403, the pressure in the boosting chamber 4 will change.

[0045] During the heating tube pressure test, the test personnel can manually adjust the pressure inside each boosting chamber 4 as needed after the first piston 12 stops working, so as to obtain multiple sets of test data in one test.

[0046] Example 2: After the heating pipe is installed in the crude oil pipeline, the crude oil in the pipeline will continuously flush the heating pipe during the transportation process, causing the heating pipe to be subjected to continuous impact force. Therefore, if Figure 10-13 As shown, the present invention accommodates an arc-shaped pressure plate 410 inside the boost chamber 4, and the pressure plate 410 rests on the inner wall of the annular airbag 402. A groove plate 5 is fixedly connected to the outer shell 2, and a pressure structure is provided in the groove plate 5 to apply horizontal pressure to the pressure plate 410. The pressure structure includes a second screw 412, and the second screw 412 is rotatably mounted on the groove plate 5. One end of the second screw 412 is fixedly connected to a second gear 413, and the other end of the second screw 412 extends to the inside of the boost chamber 4 and is threadedly fitted with a threaded sleeve 411. The threaded sleeve 411 is fixed to the pressure plate 410, and a rack 6 is slidably fitted in the groove plate 5. The rack 6 matches the second gear 413, and the bottom end of the rack 6 is vertically fixed to a guide rod 7. The bottom end of the guide rod 7 passes through the base 1, and an electric cylinder 8 is installed on the bottom surface of the base 1. The output end of the electric cylinder 8 is connected to the guide rod 7.

[0047] When the electric cylinder 8 is started, the electric cylinder 8 will drive the rack 6 to slide vertically in the groove plate 5 through the guide rod 7. During the sliding process, the rack 6 will drive the second gear 413 to rotate. The rotation of the second gear 413 will drive the second screw 412 to rotate. The rotation of the second screw 412 will drive the threaded sleeve 411 to move linearly. The linear movement of the threaded sleeve 411 will drive the pressure plate 410 to move. The movement of the pressure plate 410 can apply a continuous force to the heating tube in a single direction to simulate the continuous impact force on the heating tube.

[0048] During the compression test on the heating tube, force is applied to the heating tube through the pressure plate 410, thereby simulating the compression resistance of the heating tube under the impact of crude oil, which is more in line with the actual situation.

[0049] Working principle: When performing a pressure test on the heating tube, the heating tube is inserted into the annular airbag 402, and the tester manually rotates the clamping screw 13 to clamp and fix the heating tube so that the heating part at the bottom of the heating tube is stably maintained on the axis of the annular airbag 402.

[0050] Next, the oil cylinder 10 is started, and the output end of the oil cylinder 10 drives the first piston 12 to move into the cylinder body 3 through the connecting piece 11. As the depth of the first piston 12 inserted into the cylinder body 3 increases, the air pressure in the cylinder body 3 will also increase. Since the boosting chamber 4 is connected to the cylinder body 3 through the through hole 401 opened on the outer wall, the air pressure inside the boosting chamber 4 will also increase. Under the action of pressure, the annular airbag 402 expands toward the heating tube on the axis. The expansion of the annular airbag 402 applies external forces from different directions to the heating tube on the axis to simulate the external forces in different directions applied to the heating tube by the crude oil hydraulic pressure in the pipeline.

[0051] Secondly, as the first piston 12 is inserted deeper into the cylinder 3, the process is as follows:

[0052] The bottom end of the first piston 12 gradually becomes lower than the through hole 401 of the first boosting chamber 4. At this time, the through hole 401 of the first boosting chamber 4 is blocked by the first piston 12. At this time, the pressure inside the first boosting chamber 4 is locked.

[0053] After the internal pressure of the first boosting chamber 4 is locked, the bottom end of the first piston 12 will gradually move toward the second boosting chamber 4. As the first piston 12 moves downward, the internal pressure of the boosting chamber 4 below the first boosting chamber 4 continues to increase until the bottom end of the first piston 12 is lower than the through hole 401 of the second boosting chamber 4. At this time, the pressure inside the second boosting chamber 4 will also be locked, and the pressure inside the second boosting chamber 4 will be greater than the pressure inside the first boosting chamber 4.

[0054] Similarly, as the depth of the first piston 12 inserted into the cylinder 3 increases, the pressure inside each boosting chamber 4 becomes different, and the internal pressure of the boosting chamber 4 increases from top to bottom until the first piston 12 stops moving.

[0055] As the first piston 12 is inserted into the cylinder 3 to an increasing depth, the pressure inside the boosting chamber 4 increases successively. As the piston moves downward, the through holes 401 of each boosting chamber are blocked successively, forming an increasing pressure gradient from top to bottom. That is, the lower the height, the greater the pressure inside the boosting chamber 4. This simulates the situation where the heating pipe is inserted into crude oil and is subjected to greater hydraulic pressure as the depth increases.

[0056] The staff can drive the driving wheel 9 to rotate, and the rotation of the driving wheel 9 will drive the first gear 406 to rotate, and the rotation of the first gear 406 will drive the first screw 407 to rotate. The rotation of the first screw 407 will drive the nut seat 408 to move linearly, and the linear movement of the nut seat 408 will drive the second piston 404 to slide in the groove 403 through the hinge rod 409. During the sliding process of the second piston 404 in the groove 403, the pressure in the boosting chamber 4 will change.

[0057] During the heating tube pressure test, the test personnel can manually adjust the pressure inside each boosting chamber 4 as needed after the first piston 12 stops working, so as to obtain multiple sets of test data in one test.

[0058] When the electric cylinder 8 is started, the electric cylinder 8 will drive the rack 6 to slide vertically in the groove plate 5 through the guide rod 7. During the sliding process, the rack 6 will drive the second gear 413 to rotate. The rotation of the second gear 413 will drive the second screw 412 to rotate. The rotation of the second screw 412 will drive the threaded sleeve 411 to move linearly. The linear movement of the threaded sleeve 411 will drive the pressure plate 410 to move. The movement of the pressure plate 410 can apply a continuous force to the heating tube in a single direction to simulate the continuous impact force on the heating tube.

[0059] During the compression test on the heating tube, force is applied to the heating tube through the pressure plate 410, thereby simulating the compression resistance of the heating tube under the impact of crude oil, which is more in line with the actual situation.

[0060] Compared with the pressure testing machine in the prior art, the heating tube pressure testing equipment provided by the present invention uses air pressure to expand the annular airbag 402 to apply external forces in different directions to the heating tube, so as to simulate the crude oil hydraulic pressure in the pipeline applying external forces in different directions to the heating tube; by increasing the depth of the first piston 12 in the cylinder body 3, the internal pressure of each annular airbag 402 increases from top to bottom, so as to simulate the situation where the hydraulic pressure inside the crude oil increases with increasing depth, which is more in line with the actual situation.

[0061] As the second piston 404 slides in the groove 403, the pressure in the boost chamber 4 will change, so that during the pressure test of the heating tube, the test personnel can manually adjust the pressure inside each boost chamber 4 as needed after the first piston 12 stops working, so as to achieve the purpose of obtaining multiple sets of test data in one test.

[0062] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A heating tube pressure test device, comprising a base (1), an oil cylinder (10) fixedly connected to the upper surface of the base (1), and a connecting piece (11) fixedly connected to the top of the oil cylinder (10), characterized in that: A first piston (12) is fixedly connected to the connecting member (11), two arc-shaped shells (2) are fixedly connected to the upper surface of the base (1), an arc-shaped cylinder (3) is fixedly connected inside the shell (2), the first piston (12) cooperates with the cylinder (3), and a plurality of boosting chambers (4) are fixedly connected to the outer wall of the cylinder (3) from top to bottom. A through hole (401) is opened on the outer ring of the boosting chamber (4) to connect the boosting chamber (4) with the cylinder (3), and an annular air bag (402) is fixedly connected to the inner ring of the boosting chamber (4), and the annular air bag (402) is connected to the boosting chamber (4).

2. The heating tube pressure test equipment according to claim 1, characterized in that: A ring member (14) is fixedly connected to the top of the housing (2), and two clamping screws (13) are threadedly engaged on both sides of the ring member (14) to clamp and fix the heating tube.

3. The heating tube pressure test equipment according to claim 2, characterized in that: The inner diameter of the annular air bag (402) is larger than the outer diameter of the heating tube.

4. The heating tube pressure test equipment according to claim 3, characterized in that: An annular groove (403) is provided on both the upper and lower sides of the inside of the boost chamber (4), an annular second piston (404) is slidably fitted in the groove (403), a spring (405) is fixed to the inner wall of the groove (403), and one end of the spring (405) is connected to the second piston (404).

5. The heating tube pressure test equipment according to claim 4, characterized in that: A plurality of drive structures are provided on the outer wall of the housing (2), and the drive structures correspond one to one with the boosting chambers (4) and are used to drive the second piston (404) in the corresponding boosting chamber (4) to slide in the groove (403).

6. The heating tube pressure test equipment according to claim 5, characterized in that: The driving structure includes a first screw (407) and a hinged rod (409), wherein the first screw (407) is rotatably mounted on the outer wall of the boost chamber (4), one end of the first screw (407) is fixedly connected to the first gear (406), the other end of the first screw (407) extends into the boost chamber (4) and is threadedly engaged with a nut seat (408), one end of the hinged rod (409) is hinged to the nut seat (408), and the other end of the hinged rod (409) is hinged to the second piston (404), and a driving wheel (9) is rotatably mounted on the outer wall of the housing (2), and the driving wheel (9) cooperates with the first gear (406) to drive the first gear (406) to rotate.

7. The heating tube pressure test equipment according to claim 6, characterized in that: The pressurizing chamber (4) contains an arc-shaped pressure plate (410), which rests against the inner wall of the annular airbag (402).

8. The heating tube pressure test equipment according to claim 7, characterized in that: A slot plate (5) is fixedly connected to the housing (2), and a pressure structure is provided in the slot plate (5) to apply horizontal pressure to the pressure plate (410).

9. The heating tube pressure test equipment according to claim 8, characterized in that: The pressure structure includes a second screw (412), which is rotatably mounted on the groove plate (5), one end of the second screw (412) is fixedly connected to a second gear (413), and the other end of the second screw (412) extends into the interior of the boost chamber (4) and is threadedly engaged with a threaded sleeve (411), the threaded sleeve (411) is fixedly connected to the pressure plate (410), and a rack (6) is slidably engaged in the groove plate (5), and the rack (6) matches the second gear (413).

10. The heating tube pressure test equipment according to claim 9, characterized in that: The bottom end of the rack (6) is vertically fixed with a guide rod (7), the bottom end of the guide rod (7) passes through the base (1), an electric cylinder (8) is installed on the bottom surface of the base (1), and the output end of the electric cylinder (8) is connected to the guide rod (7).

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