Equipment for continuously detecting on-way pressure in pipeline and detection method

Abstract

The invention discloses equipment for continuously detecting on-way pressure in a pipeline and a detection method, and relates to the technical field of long-distance pipeline pressure detection. According to the technical scheme, the equipment is characterized in that the equipment comprises a passing shaft, a front leather cup and a rear leather cup are arranged at the two ends of the passing shaft respectively, 3-4 connecting frames are evenly arranged on the portion, between the front leather cup and the rear leather cup, of the passing shaft along the circumferential surface of the passing shaft, pressure sensors are arranged on the connecting frames, rolling wheels are arranged at the ends of the connecting frames, and the rolling wheels are connected with the pressure sensors. The connecting frame is further provided with a counting mechanism used for counting the number of rotation turns of the rolling wheel. The invention aims to provide equipment for continuously detecting on-way pressure in a pipeline and a detection method.

Description

Technical Field

[0001] The invention relates to a long-distance pipeline pressure detection technology, and more specifically, to a device and a detection method for continuous pressure detection along the pipeline. Background Art

[0002] As an important part of the modern transportation system, pipeline transportation has unique advantages such as low transportation cost, high safety and reliability, and low environmental pollution. It is especially suitable for long-distance transportation of energy media such as oil and natural gas. Due to the complex structure of the pipeline system and the difficulty of monitoring, the medium pressure along the pipeline has a great impact on the safety and economy of transportation. In order to ensure the safe and stable operation of the long-distance pipeline system, it is necessary to conduct real-time detection of the pressure of the transported medium along the pipeline to analyze and evaluate the safe operation status of the pipeline system.

[0003] In the traditional mode, the pipeline is equipped with a terminal station, and a pipeline valve chamber is set at a certain distance along the pipeline. Pressure detection points are set in the valve chamber and the terminal station to measure the pipeline pressure at that location. This method can only collect the pressure at a specific point of the pipeline. The specific distribution of pressure along the pipeline cannot be directly measured. It needs to be derived and calculated using empirical formulas or simulated and calculated by simulation software. Affected by factors such as medium properties, pipeline material, wax and scaling on the pipe wall, and perforation and leakage of the pipe wall, this method can only approximately derive the pressure change trend of a pipeline or a certain section of the pipeline. The feedback results will be different from the actual pressure distribution along the pipeline. The calculated pressure drop and friction resistance along the pipeline will be inconsistent with the actual situation of the pipeline. In particular, whether there are local interception points along the pipeline and local pressure mutations caused by small leakage holes in the pipe wall cannot be intuitively detected in the traditional mode, and it is impossible to finely analyze the pipeline operation status and kinetic energy loss and formulate targeted governance and prevention and control measures. The inability to accurately identify potential oil and gas leaks and uncontrolled emissions of volatile organic compounds (VOCs) caused by potential minor pipeline leaks is not conducive to the comprehensive prevention and control of environmental pollution, fires, explosions and other accidents that may be caused by oil and gas leaks.

[0004] Therefore, a new technical solution is urgently needed to achieve continuous detection of pressure along the pipeline. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a device and a method for continuous pressure detection along a pipeline.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a device and a detection method for continuous pressure detection along the pipeline, the device comprises a through shaft, the two ends of the through shaft are respectively provided with a front leather cup and a rear leather cup, the through shaft is located between the front leather cup and the rear leather cup, 3-4 connecting frames are evenly arranged along its circumferential surface, the connecting frame is provided with a pressure sensor, the end of the connecting frame is provided with a rolling wheel, and the connecting frame is also provided with a counting mechanism for counting the number of rotations of the rolling wheel;

[0007] The detection method includes: placing the device into a long-distance pipeline, the device moves along the pipeline, the rolling wheel rolls on the inner wall of the long-distance pipeline, the number of rotations of the rolling wheel is counted by a counting mechanism, and while counting once, the pressure condition in the pipeline is detected and recorded by a pressure sensor.

[0008] The present invention is further configured as follows: the connecting frame includes a lower bracket and an upper bracket, the lower bracket includes a bottom rod fixedly connected to the shaft, the surface of the bottom rod is provided with a lower support rod perpendicular to the bottom rod, the upper bracket includes two upper support rods arranged on the outside of the lower support rod, a top rod is fixedly connected between the top ends of the two upper support rods, the top rod is provided with a mounting groove running through its upper and lower surfaces, the rolling wheel is installed in the mounting groove, the upper support rod is provided with a limiting groove running through its bottom end, the surface of the bottom rod is provided with a limiting rod slidably connected to the limiting groove, and a first spring is fixedly connected between the end inner wall of the limiting groove and the end of the limiting rod.

[0009] The present invention is further configured as follows: a connecting rod is fixedly connected between the top ends of the two lower support rods, the connecting rod is provided with a through hole penetrating the upper and lower surfaces thereof, the counting mechanism comprises a sliding rod which is passed through and slidably connected to the through hole, an abutment ring is provided on the circumference of the sliding rod above the connecting rod, a second spring is sleeved and fixedly connected to the sliding rod between the abutment ring and the connecting rod, the rolling wheel is provided with an annular groove along its circumferential surface, an abutment portion is provided in the annular groove, the top end of the sliding rod extends into the annular groove, and when the rolling wheel rotates, the sliding rod is driven to descend and reset through the abutment portion, and a counting device for counting the number of times the sliding rod is lifted or lowered is also included.

[0010] The present invention is further configured as follows: the counting device includes an installation box arranged between two lower support rods, a key counter is installed at the bottom of the installation box, the bottom end of the sliding rod extends into the installation box, and after the sliding rod descends, the key of the key counter is pressed to perform a count.

[0011] The present invention is further configured such that: the top end of the sliding rod is configured as a spherical surface, and the surface of the abutting portion is configured as an arc surface.

[0012] The present invention is further configured as follows: the top of the upper bracket facing the front leather cup is configured in an inclined surface.

[0013] The present invention is further configured as follows: a sealing sleeve connected to the inside of the installation box is arranged on the surface of the installation box, and the sliding rod passes through and slides on the sealing sleeve.

[0014] The present invention is further configured to include a controller and a signal transmission module, wherein the signal transmission module, the pressure sensor and the key counter are all electrically connected to the controller.

[0015] The present invention has the following beneficial effects: the device is placed in a long-distance pipeline, and the front leather cup and the rear leather cup are pushed to move under the action of the flow of the medium in the pipeline, thereby driving the detection device to move in the pipeline, the device moves along the pipeline, the rolling wheel rolls on the inner wall of the long-distance pipeline, the rolling wheel rotates, and the number of rotations of the rolling wheel is counted by the counting mechanism. While counting once, the pressure condition in the pipeline is detected and recorded by the pressure sensor 5. The present invention breaks through the limitation of the traditional mode that the pressure can only be detected at a few points in the pipeline, and realizes the function of continuous and accurate pressure detection along the pipeline. Accurate detection of pipeline pressure along the way can provide data support for the detailed analysis of pipeline hydraulic working condition changes and energy consumption losses. It can also analyze the pressure drop and friction resistance along the way through the pressure change along the way, and then analyze whether there are local pressure mutations caused by local interception points, local small leakage holes in the pipe wall, etc. in the pipeline, and then analyze whether there are local material abnormalities, abnormal effective diameter of the pipe diameter, wax and scaling on the pipe wall, local blockage and pressure holding in the pipeline, local perforation and small leakage of the pipe wall or other abnormal working conditions, and take targeted governance and prevention measures in time to reduce water and soil environmental pollution caused by pipeline oil and gas leakage, uncontrolled emission of volatile organic compounds (VOCs) to pollute the atmosphere, fire and explosion, personnel poisoning and other potential accidents, and further improve the essential control level of pipeline system safety and environmental protection. At the same time, the values ​​​​through continuous detection can also be used to correct the hydraulic simulation results, correct the simulation analysis and mechanism understanding of the friction loss and waxing rules along the pipeline, facilitate the improvement of the operation mechanism in the daily management of the pipeline, optimize the subsequent operation and maintenance mode, reduce the power loss of the machine pump, and support integrity management and energy saving, cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of this embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of the connecting frame of this embodiment;

[0018] Figure 3 is a schematic cross-sectional structural diagram of the connecting frame of this embodiment;

[0019] Figure 4is a schematic structural diagram of the lower bracket of this embodiment;

[0020] Figure 5 is a schematic structural diagram of the upper bracket of this embodiment;

[0021] Figure 6 for Figure 3 A partial enlarged schematic diagram of the middle A part;

[0022] Figure 7 A trend diagram of pressure detection in a pipeline using the prior art;

[0023] Figure 8 This is a trend diagram of the pressure detection in a pipeline according to this embodiment;

[0024] Fig. 9 A trend diagram of pressure detection in another pipeline using the prior art;

[0025] Fig.10 This is a trend diagram of the pressure detection in another pipeline according to this embodiment.

[0026] Description of the drawings: 1. Through shaft; 2. Front leather cup; 3. Rear leather cup; 4. Connecting frame; 5. Pressure sensor; 6. Rolling wheel; 7. Lower bracket; 701. Bottom rod; 702. Lower support rod; 8. Upper bracket; 801. Upper support rod; 802. Top rod; 9. Limiting groove; 10. Limiting rod; 11. First spring; 12. Connecting rod; 13. Sliding rod; 14. Abutment ring; 15. Second spring; 16. Annular groove; 17. Abutment part; 18. Installation box; 19. Key counter; 20. Sealing sleeve. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0028] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] As shown in the figure, a device and a detection method for continuous pressure detection along the pipeline are provided. The device includes a through shaft 1, and a front leather cup 2 and a rear leather cup 3 are respectively arranged at both ends of the through shaft 1. Four connecting frames 4 are evenly arranged along the circumferential surface of the through shaft 1 between the front leather cup 2 and the rear leather cup 3. A pressure sensor 5 is arranged on the connecting frame 4. A rolling wheel 6 is arranged at the end of the connecting frame 4. A counting mechanism for counting the number of rotations of the rolling wheel 6 is also arranged on the connecting frame 4.

[0030] The detection method includes the following steps: placing the device into a long-distance pipeline, and under the action of the flow of the medium in the pipeline, the front leather cup 2 and the rear leather cup 3 are pushed to move, thereby driving the detection device to move in the pipeline, the device moves along the pipeline, the rolling wheel 6 rolls on the inner wall of the long-distance pipeline, the rolling wheel 6 rotates, and the number of rotations of the rolling wheel 6 is counted by a counting mechanism. While counting once, the pressure condition in the pipeline is detected and recorded by the pressure sensor 5, so as to timely correct the pipeline simulation results and facilitate the later maintenance of the pipeline.

[0031] The present invention breaks through the limitation of the traditional mode that pressure can only be detected at a few points in the pipeline, and realizes the function of continuous and accurate detection of pressure along the pipeline. Accurate detection of pressure along the pipeline can provide data support for the detailed analysis of hydraulic changes and energy consumption losses in the pipeline. It can also analyze whether there are local interception blockages, local small leakage holes in the pipe wall, etc. through pressure changes along the pipeline, and then analyze whether there are local pressure build-up, local small leakage or other abnormal working conditions in the pipeline, and take targeted measures in time to reduce the volatilization of organic matter caused by pipeline oil and gas leakage, and prevent safety and environmental accidents. The continuously detected values ​​can also be used to correct the hydraulic simulation results, correct the simulation analysis and mechanism understanding of the wax deposition along the pipeline, and facilitate the daily management of the pipeline and the optimization of the later operation and maintenance mode.

[0032] The connecting frame 4 includes a lower bracket 7 and an upper bracket 8. The lower bracket 7 includes a bottom rod 701 fixedly connected to the shaft 1. The surface of the bottom rod 701 is provided with a lower support rod 702 perpendicular to the bottom rod 701. The upper bracket 8 includes two upper support rods 801 arranged on the outside of the lower support rod 702. A top rod 802 is fixedly connected between the top ends of the two upper support rods 801. The top rod 802 is provided with a mounting groove running through its upper and lower surfaces. The rolling wheel 6 is installed in the mounting groove. The top of the rolling wheel 6 extends out of the surface of the top rod 802. The upper support rod 801 is provided with a limiting groove 9 running through its bottom end. The surface of the bottom rod 701 is provided with a limiting rod 10 slidably connected to the limiting groove 9. A first spring 11 is fixedly connected between the inner wall of the end of the limiting groove 9 and the end of the limiting rod 10.

[0033] After the device enters the pipeline, the first spring 11 is in a compressed state. Under the elastic force of the first spring 11, the rolling wheel 6 can be pressed against the inner wall of the pipeline, so that after the device moves in the pipeline, the rolling wheel 6 can roll along the inner wall of the pipeline. After it rotates one circle, it is counted once by the counting mechanism, and the pressure is detected and recorded at the same time. The distance traveled by the rolling wheel 6 in one rotation can be obtained based on the radius of the rolling wheel 6, so that the pressure at each position of the pipeline can be accurately detected and recorded, thereby generating the pressure distribution trend along the pipeline.

[0034] A connecting rod 12 is fixedly connected between the top ends of the two lower support rods 702, and the connecting rod 12 is provided with a through hole penetrating the upper and lower surfaces thereof. The counting mechanism includes a sliding rod 13 which is passed through and slidably connected to the through hole, and an abutment ring 14 is provided on the circumference of the sliding rod 13 above the connecting rod 12. A second spring 15 is sleeved and fixedly connected to the sliding rod 13 between the abutment ring 14 and the connecting rod 12. An annular groove 16 is provided along the circumferential surface of the rolling wheel 6, and an abutment portion 17 is provided in the annular groove 16. The top end of the sliding rod 13 extends into the annular groove 16. When the rolling wheel 6 rotates, the sliding rod 13 is driven to descend and reset through the abutment portion 17, and a counting device for counting the number of times the sliding rod 13 is lifted and lowered is also included.

[0035] When the rolling wheel 6 rotates one circle, the abutment 17 contacts the top end of the sliding rod 13, driving the sliding rod 13 to descend, the second spring 15 is compressed, and a count is performed by the counting device. The rolling wheel 6 continues to rotate, the abutment 17 separates from the sliding rod 13, and the sliding rod 13 is reset under the elastic force of the second spring 15.

[0036] The counting device includes an installation box 18 arranged between the two lower support rods 702. A key counter 19 is installed at the bottom of the installation box 18. The bottom end of the sliding rod 13 extends into the installation box 18. After the sliding rod 13 descends, the key of the key counter 19 is pressed to count once, thereby counting the number of rotations of the scroll wheel 6.

[0037] The top of the sliding rod 13 is spherical, and the surface of the abutting portion 17 is arc-shaped. When the rolling wheel 6 rotates one circle, it can smoothly drive the sliding rod 13 to slide downward, ensuring the smooth progress of the counting work.

[0038] The top of the upper bracket 8 facing the front leather cup 2 is inclined. When the device is placed in the pipeline, the inclined surface at the top of the upper bracket 8 abuts against the end of the pipeline. When the device is pushed, the upper bracket 8 is driven to slide downward along the lower bracket 7 and the device is completely placed in the pipeline for easy use.

[0039] The surface of the installation box 18 is provided with a sealing sleeve 20 connected to the installation box 18 , and the sliding rod 13 passes through and slides on the sealing sleeve 20 to ensure the sealing of the installation box 18 to prevent the medium in the pipeline from flowing into the installation box 18 .

[0040] It also includes a controller and a signal transmission module. The signal transmission module, the pressure sensor 5 and the key counter 19 are all electrically connected to the controller. The signal transmission module is specifically a wireless signal transmission module. When the key counter 19 counts once, the pressure sensor 5 transmits the pressure signal at this time to the controller. The controller transmits the received 4 groups of pressure signals to the console through the signal transmission module, and generates 4 pressure distribution state diagrams along the pipeline for each group of pressure values, so as to accurately express the pressure conditions at various positions inside the pipeline.

[0041] like Figure 7 and 9 As shown, in the prior art, when testing the pressure in two pipelines, the temperature at the first and last stations is tested, and then the pressure in the valve chamber is tested, so as to infer the pressure conditions at various locations in the pipeline. Figure 8 and 10 As shown, the internal pressure of two pipes is detected through the present application. The detection device of the present application enters into the pipe and moves along the pipe to detect the pressure at various positions in the pipe, thereby being able to accurately express the pressure conditions at various positions inside the pipe.

[0042] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A device and a method for continuous pressure detection along a pipeline, characterized in that: The device comprises a through shaft (1), a front leather cup (2) and a rear leather cup (3) are respectively arranged at both ends of the through shaft (1), the through shaft (1) is located between the front leather cup (2) and the rear leather cup (3), 3-4 connecting frames (4) are evenly arranged along the circumferential surface of the through shaft (1), a pressure sensor (5) is arranged on the connecting frame (4), a rolling wheel (6) is arranged at the end of the connecting frame (4), and a counting mechanism for counting the number of rotations of the rolling wheel (6) is also arranged on the connecting frame (4); The detection method comprises the following steps: placing the device in a long-distance pipeline, the device moving along the pipeline, the rolling wheel (6) rolling on the inner wall of the long-distance pipeline, counting the number of rotations of the rolling wheel (6) by a counting mechanism, and detecting and recording the pressure condition in the pipeline by a pressure sensor (5) while counting once.

2. The device and method for continuous pressure detection along the pipeline according to claim 1, characterized in that: The connecting frame (4) comprises a lower bracket (7) and an upper bracket (8), wherein the lower bracket (7) comprises a bottom rod (701) fixedly connected to the shaft (1), the surface of the bottom rod (701) is provided with a lower support rod (702) perpendicular to the bottom rod (701), the upper bracket (8) comprises two upper support rods (801) arranged on the outer sides of the lower support rod (702), a top rod (802) is fixedly connected between the top ends of the two upper support rods (801), the top rod (802) is provided with a mounting groove penetrating the upper and lower surfaces thereof, the rolling wheel (6) is installed in the mounting groove, the upper support rod (801) is provided with a limiting groove (9) penetrating the bottom end thereof, the surface of the bottom rod (701) is provided with a limiting rod (10) slidably connected to the limiting groove (9), and a first spring (11) is fixedly connected between the inner wall of the end of the limiting groove (9) and the end of the limiting rod (10).

3. The device and method for continuous pressure detection along the pipeline according to claim 2, characterized in that: A connecting rod (12) is fixedly connected between the top ends of the two lower support rods (702), and the connecting rod (12) is provided with a through hole penetrating the upper and lower surfaces thereof. The counting mechanism comprises a sliding rod (13) which is penetrated and slidably connected to the through hole, and a contact ring (14) is provided on the circumference of the sliding rod (13) above the connecting rod (12). A second spring (15) is sleeved and fixedly connected between the contact ring (14) and the connecting rod (12) on the sliding rod (13). An annular groove (16) is provided along the circumferential surface of the rolling wheel (6), and an abutment portion (17) is provided in the annular groove (16). The top end of the sliding rod (13) extends into the annular groove (16). When the rolling wheel (6) rotates, the sliding rod (13) is driven to descend and reset through the abutment portion (17). The counting mechanism also comprises a counting device for counting the number of times the sliding rod (13) is lifted and lowered.

4. The device and method for continuous pressure detection along the pipeline according to claim 3, characterized in that: The counting device comprises an installation box (18) arranged between two lower support rods (702), a key counter (19) is installed at the bottom of the installation box (18), the bottom end of the sliding rod (13) extends into the installation box (18), and after the sliding rod (13) descends, a key of the key counter (19) is pressed to perform a count.

5. The device and method for continuous pressure detection along the pipeline according to claim 4, characterized in that: The top end of the sliding rod (13) is spherical, and the surface of the abutting portion (17) is curved.

6. The device and method for continuous pressure detection along the pipeline according to claim 5, characterized in that: The top of the upper bracket (8) facing the front leather cup (2) is arranged in an inclined surface.

7. The device and method for continuous pressure detection along the pipeline according to claim 6, characterized in that: The surface of the installation box (18) is provided with a sealing sleeve (20) which is connected to the installation box (18), and the sliding rod (13) passes through and slides on the sealing sleeve (20).

8. The device and method for continuous pressure detection along the pipeline according to claim 7, characterized in that: It also includes a controller and a signal transmission module, wherein the signal transmission module, the pressure sensor (5) and the key counter (19) are all electrically connected to the controller.

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