CN212844755U - Mechanical composite pipe lining collapse evaluation device - Google Patents
Mechanical composite pipe lining collapse evaluation device Download PDFInfo
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- CN212844755U CN212844755U CN202020657416.1U CN202020657416U CN212844755U CN 212844755 U CN212844755 U CN 212844755U CN 202020657416 U CN202020657416 U CN 202020657416U CN 212844755 U CN212844755 U CN 212844755U
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Abstract
The utility model discloses a mechanical composite pipe lining layer collapse evaluation device, which comprises a liquid preparation container, a gas treatment device, a heating assembly, a lining layer collapse monitoring assembly, a first test plug and a second test plug, wherein the first test plug and the second test plug are used for plugging two ends of a test pipe; heating element and lining collapse monitoring subassembly all set up at experimental tubular product outer wall. The utility model discloses can show the ability of the anti lining of different tubular products collapse with the help of the experimental tubular product of different forms, simultaneously with the help of the lining monitoring subassembly that collapses records the change process that the lining warp along with time, and then realize the whole monitoring of collapsing and effectively assess the lining to different tubular products evacuation in-process. Whole automatic intelligence of whole test process is controlled, convenient operation does benefit to and realizes and rational in infrastructure.
Description
Technical Field
The utility model belongs to material composition capability test field relates to a mechanical composite pipe lining layer evaluation device that sinks.
Background
In recent years, the bimetal composite pipe is becoming an anti-corrosion pipeline for solving the problem of high-corrosivity oil and gas gathering and transportation. At present, a large amount of corrosion-resistant alloy lining composite pipes are used for a high-corrosivity oil and gas gathering and transportation pipe network, but a plurality of lining collapse failure cases occur in application. The base pipe and the lining of the mechanical composite pipe are tightly attached together only by external load such as water pressure, and the base pipe and the lining are not integrated substantially. In practice, once the lining is subjected to excessive force, the lining may deform, which in turn affects pipe operation, and therefore the collapse resistance of the lining becomes a property that must be evaluated for pipe use.
At present, the industry mainly focuses on the problem of pipe lining collapse in the external corrosion prevention process, the influence of a manufacturing process link is analyzed, the lining collapse resistance is evaluated by establishing a GB/T37701 standard and preserving heat for a certain time under the corrosion prevention temperature condition, a corresponding collapse test tool is provided in the Chinese patent with the application number of 201420448517.2, however, the existing standard and technology are not related to the failure mode (liner collapse is found in partial pipe sections after the pipe is emptied) in the operation process, the lining collapse resistance found after the pipe is emptied cannot be evaluated, and the failure reason, the influence factors and the subsequent control means cannot be well researched.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that failure modes such as lining subsides after the pipeline evacuation in the prior art can't be aassessment, provide a mechanical composite pipe lining layer evaluation device that subsides, can accurate simulation pipeline operating temperature, operating mode environment such as medium, pressure, realize evacuation speed accurate control under the different gas-liquid ratio condition, the process of subsideing of on-line monitoring tubular product lining, the composite pipe lining layer process of subsideing of lining under the different states of comprehensive show realizes that the lining ability of subsideing effectively assesses.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a mechanical composite pipe lining collapse evaluation device comprises a liquid distribution container, a gas distribution container, gas treatment equipment, a heating assembly, a lining collapse monitoring assembly, a first test plug and a second test plug, wherein the first test plug and the second test plug are used for plugging two ends of a test pipe; heating element and lining collapse monitoring subassembly all set up at experimental tubular product outer wall.
The first through hole is communicated with the liquid preparation container through a liquid injection pipe, and a liquid metering pump and a liquid one-way protection valve are installed on the liquid injection pipe.
The second through hole is communicated with the gas distribution container through a gas injection pipe, and a gas booster pump and a gas one-way protection valve are installed on the gas injection pipe.
The third through hole is communicated with the gas treatment equipment through a first exhaust pipe, and a flow control valve is installed on the first exhaust pipe.
And a second emptying pipe communicated with the atmosphere and the gas treatment equipment is arranged at the upper end of the gas treatment equipment.
A pressure sensing element and a first temperature sensing element are arranged in the test pipe, and the pressure sensing element and the first temperature sensing element respectively extend to the outer sides of the first test plug and the second test plug.
And a second temperature sensing element and a heat-insulating layer are arranged on the outer wall of the test pipe.
The control end of the control unit is connected with the lining collapse monitoring assembly, the liquid metering pump, the gas booster pump, the flow control valve, the pressure sensing element, the first temperature sensing element and the second temperature sensing element.
And lining collapse monitoring assemblies are arranged on the outer wall of the test pipe at intervals of 120 degrees in the circumferential direction.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a mechanical composite pipe lining layer evaluation device that sinks, experimental tubular product both ends are installed respectively and are joined in marriage liquid container, distribution container and gas recovery equipment, and heating element and lining monitoring subassembly that sinks are installed to experimental tubular product outer wall. The liner collapse resistance of different pipes can be displayed by means of test pipes in different forms, the change process of the change of the echo among the interfaces along with the time is recorded by the liner collapse monitoring assembly, the deformation amplitude of the liner is displayed by using the change curve of the echo among the interfaces, and the liner collapse in the whole process of emptying different pipes is monitored and effectively evaluated; the control unit is provided with the flow control valve to allow the evacuation speed to be simulated through flow, so that the pipe evacuation process under different gas-liquid ratios can be reproduced; whole automatic intelligence of whole test process is controlled, convenient operation does benefit to and realizes and rational in infrastructure.
Further, the test pipe, that is, the pipe section of the mechanical composite pipe under different conditions to be evaluated in the test, may be a pipe in a perfect condition, or a pipe section with a defective lining, or a pipe with a perforated lining, etc.
Further, liquid one-way protection valve and gaseous one-way protection valve set up respectively on annotating liquid pipe and gas injection pipe, can avoid liquid and gaseous backward flow in the experimental tubular product.
Furthermore, a pneumatic control valve is selected as the flow control valve, and the control precision is 0.01m 3/min.
Further, the pressure sensing element penetrates through the test plug and penetrates into the test sample to measure the internal pressure of the pipeline; the first temperature sensing element and the second temperature sensing element are respectively attached to the outer wall of the test pipe and penetrate through the test plug to extend into the test pipe, and are used for measuring the temperature in the pipe and the medium temperature of the pipe wall so as to control the medium temperature in the pipe.
Furthermore, the liquid injection pipe, the gas injection pipe and the emptying pipe have pressure-bearing and corrosion-resistant capabilities, and corrosion-resistant alloy materials are selected.
Furthermore, the control unit can control the air input of the gas metering pump according to the pressure fed back by the sensing element, control the liquid inlet quantity of the liquid metering pump according to a set numerical value, control the emptying rate of the flow control valve according to the set numerical value and record an echo time-varying curve between interfaces according to the monitoring fine assembly.
Drawings
Fig. 1 is a schematic structural diagram of the mechanical composite pipe lining collapse evaluation device of the present invention.
Wherein: 1-test tubing; 2-a liquid preparation container; 3-a gas distribution container; 4-a gas treatment unit; 5-liner collapse monitoring assembly; 6-a control unit; 7-a first test plug; 8-liquid injection pipe; 9-a gas injection pipe; 10-liquid metering pump; 11-liquid one-way protection valve; 12-gas booster pump; 13-gas one-way protection valve; 14-a first evacuation pipe; 15-a flow control valve; 16-a pressure sensing element; 17-a first temperature sensing element; 18-a heating assembly; 19-an insulating layer; 20-a second test plug; 21-a second temperature sensing element; 22-second evacuation pipe.
Detailed Description
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model provides a mechanical composite pipe lining evaluation device that sinks, including join in marriage liquid container 2, distribution container 3, gas treatment facility 4, be used for the experimental end cap 7 of the first experiment at 1 both ends of shutoff tubular product and the experimental end cap 20 of second, experimental tubular product 1 is experimental not the same state that needs the aassessment under mechanical composite pipe section promptly, can be the pipeline of sound condition, or the lining has the pipeline section of defect state, also can be the pipeline etc. of lining perforation state. The first test plug 7 is provided with a first through hole and a second through hole, the second test plug 20 is provided with a third through hole, the first through hole is communicated with the liquid preparation container 2 through a liquid injection pipe 8, and the liquid injection pipe 8 is provided with a liquid metering pump 10 and a liquid one-way protection valve 11. The second through hole is communicated with the gas distribution container 3 through a gas injection pipe 9, and a gas booster pump 12 and a gas one-way protection valve 13 are arranged on the gas injection pipe 9. The liquid one-way protection valve 11 and the gas one-way protection valve 13 can prevent liquid and gas in the test pipe from flowing backwards. The third through hole is communicated with the gas treatment equipment 4 through a first emptying pipe 14, a flow control valve 15 is installed on the first emptying pipe 14, a pneumatic control valve is selected as the flow control valve, and the control precision is 0.01m 3/min. The upper end of the gas processing apparatus 4 is provided with a second evacuation pipe 22 for communicating the atmosphere with the inside of the gas processing apparatus 4.
Evaluation device still includes heating element 18 and lining monitoring subassembly 5 that sinks, all sets up at 1 outer wall of experimental tubular product, and 1 outer wall of experimental tubular product is followed circumferencial direction interval 120 and is installed lining monitoring subassembly 5 that sinks. A pressure sensing element 16 and a first temperature sensing element 17 are arranged in the test pipe 1, and the pressure sensing element 16 penetrates through the test plug and penetrates into the test sample to be used for measuring the internal pressure of the pipeline. The outer wall of the test pipe 1 is provided with a second temperature sensing element 21 and a heat preservation layer 19, and the first temperature sensing element 17 and the second temperature sensing element 21 are respectively attached to the outer wall of the test pipe 1 and penetrate through the test plug to extend into the test pipe for measuring the temperature in the pipe and the medium temperature of the pipe wall so as to control the medium temperature in the pipe.
A control unit 6 is also included, and the control end of the control unit 6 is connected with the liner collapse monitoring assembly 5, the liquid metering pump 10, the gas booster pump 12, the flow control valve 15, the pressure sensing element 16, the first temperature sensing element 17 and the second temperature sensing element 21. The control unit can control the air input of the gas metering pump according to the pressure fed back by the sensing element, control the liquid inlet quantity of the liquid metering pump according to a set numerical value, control the emptying rate of the flow control valve according to the set numerical value and record an echo time-varying curve between interfaces according to the monitoring assembly.
The utility model provides an evaluation method of mechanical composite pipe lining collapse evaluation device, including following step:
step 1, setting a target test solution volume, a pipe wall temperature, a pipe pressure, a pressure maintaining time and an emptying flow in a control unit 6, setting a priority order, and completing test solution pumping, test temperature operation, test gas pumping, pressure maintaining operation and emptying operation in sequence to complete test preparation;
step 2, pumping the test solution in the liquid preparation container 2 into the test pipe 1 through the liquid injection pipe 8 until the volume of the solution reaches the set volume of the test solution according to the working condition requirement, starting the heating assembly 18 until the temperature of the pipe wall rises to the set pipe wall temperature, keeping constant temperature heating until the temperature in the pipe reaches the set pipe temperature, keeping the temperature, pumping the test gas in the gas preparation container 3 into the test pipe 1 through the gas injection pipe 9 until the pressure in the pipe reaches the set pipe pressure, and completing the medium simulation stage of the test working condition;
step 3, starting test timing until reaching the set pressure maintaining time, and finishing the pressure maintaining stage; during the pressure maintaining period, when the temperature in the test tube 1 falls back, the heating assembly 18 is started to heat again, the heating is stopped until the temperature in the test tube 1 reaches the temperature in the set tube, and the operation is circulated;
and 4, evacuating according to the set evacuation flow, controlling the evacuation rate of the flow control valve 15 through the control unit 6, discharging the gas in the test pipe 1 to the gas processing device 4 through the first evacuation pipe 14, discharging the processed gas to the atmosphere through the second evacuation pipe 22, recording the change process of the deformation of the lining along with time through the lining collapse monitoring assembly 5, finishing evacuation, and finishing the test.
The utility model discloses an evaluation device that mechanical composite pipe lining sinks sets up the procedure parameter at the control unit according to the operating condition, controls parameters such as test tubular product temperature, pressure, gas-liquid ratio by oneself, and then truly simulates the tubular product operating condition; the liner collapse resistance of different pipes can be displayed by means of test pipes in different forms, and the change process of liner deformation along with time is recorded by means of the liner collapse monitoring assembly, so that the liner collapse in the emptying process of different pipes can be monitored and evaluated effectively in the whole process. Whole automatic intelligence of whole test process is controlled, convenient operation does benefit to and realizes and rational in infrastructure.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (9)
1. The lining collapse evaluation device of the mechanical composite pipe is characterized by comprising a liquid preparation container (2), a gas distribution container (3), gas treatment equipment (4), a heating assembly (18), a lining collapse monitoring assembly (5), a first test plug (7) and a second test plug (20), wherein the first test plug (7) and the second test plug (20) are used for plugging two ends of a test pipe (1), a first through hole and a second through hole are formed in the first test plug (7), the first through hole is communicated with the liquid preparation container (2), the second through hole is communicated with the gas distribution container (3), a third through hole is formed in the second test plug (20), and the third through hole is communicated with the gas treatment equipment (4); the heating assembly (18) and the lining collapse monitoring assembly (5) are both arranged on the outer wall of the test pipe (1).
2. The mechanical composite pipe lining collapse evaluation device according to claim 1, wherein the first through hole is communicated with the liquid preparation container (2) through a liquid injection pipe (8), and a liquid metering pump (10) and a liquid one-way protection valve (11) are installed on the liquid injection pipe (8).
3. The mechanical composite pipe lining collapse evaluation device according to claim 1, wherein the second through hole is communicated with the gas distribution container (3) through a gas injection pipe (9), and a gas booster pump (12) and a gas one-way protection valve (13) are installed on the gas injection pipe (9).
4. The mechanical composite pipe lining collapse evaluation device according to claim 1, wherein the third through hole is communicated with the gas processing equipment (4) through a first emptying pipe (14), and a flow control valve (15) is installed on the first emptying pipe (14).
5. The mechanical composite pipe lining collapse evaluation device according to claim 1, wherein a second emptying pipe (22) communicated with the atmosphere and the gas processing equipment (4) is arranged at the upper end of the gas processing equipment (4).
6. The mechanical composite pipe lining collapse evaluation device of claim 1,
a pressure sensing element (16) and a first temperature sensing element (17) are arranged in the test pipe (1), and the pressure sensing element (16) and the first temperature sensing element (17) respectively extend to the outer sides of the first test plug (7) and the second test plug (20).
7. The mechanical composite pipe lining collapse evaluation device is characterized in that a second temperature sensing element (21) and an insulating layer (19) are mounted on the outer wall of the test pipe (1).
8. The mechanical composite pipe lining collapse evaluation device according to claim 1, further comprising a control unit (6), wherein a control end of the control unit (6) is connected with the lining collapse monitoring assembly (5), the liquid metering pump (10), the gas booster pump (12), the flow control valve (15), the pressure sensing element (16), the first temperature sensing element (17) and the second temperature sensing element (21).
9. The lining collapse evaluation device for the mechanical composite pipe according to claim 1, wherein lining collapse monitoring assemblies (5) are installed on the outer wall of the test pipe (1) at intervals of 120 degrees in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020657416.1U CN212844755U (en) | 2020-04-26 | 2020-04-26 | Mechanical composite pipe lining collapse evaluation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020657416.1U CN212844755U (en) | 2020-04-26 | 2020-04-26 | Mechanical composite pipe lining collapse evaluation device |
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| Publication Number | Publication Date |
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| CN212844755U true CN212844755U (en) | 2021-03-30 |
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| CN202020657416.1U Active CN212844755U (en) | 2020-04-26 | 2020-04-26 | Mechanical composite pipe lining collapse evaluation device |
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