A control system and method for detecting ball-passing operations in a gas pipeline

Abstract

The present invention relates to a control system and method for detecting ball-passing operations in a gas pipeline, wherein the system comprises a starting device for issuing a ball-passing instruction; a control device for generating a pressure-reducing and speed-increasing control signal according to the ball-passing instruction before the ball enters the gas pipeline section to be detected; an execution device for reducing the natural gas pressure in the gas pipeline section to be detected and increasing the natural gas flow rate in the section according to the pressure-reducing and speed-increasing control signal; a data acquisition device for collecting the movement speed of the ball after the ball enters the gas pipeline section to be detected; the control device is also used for generating a first-station pressure-regulating signal and an out-station pressure-regulating signal according to the movement speed of the ball; the execution device is also used for adjusting the first-station section pressure according to the first-station pressure-regulating signal and adjusting the out-station section pressure according to the out-station pressure-regulating signal, so as to regulate the movement speed of the ball; the present invention can effectively prevent the blockage caused by too slow speed and improve the detection effect in the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of ball detection in gas pipelines, and in particular to a control system and method for ball detection in gas pipelines. Background Art

[0002] Natural gas pipeline is an important way of transporting energy. During the long-term operation of natural gas pipeline, the water vapor and solid impurities carried in the natural gas will gradually condense and precipitate, thereby reducing the cross-sectional area of ​​the pipeline, reducing the gas transmission efficiency, and seriously affecting the normal operation of the pipeline. At the same time, the sulfide contained in the natural gas will form hydrates with water, causing corrosion of the inner wall of the pipeline and even posing a safety hazard. Based on this, many gas transmission companies regard the internal inspection ball operation as a routine operation, and regularly clean, inspect and maintain it to ensure the efficient operation and safety of the gas transmission pipeline.

[0003] The quality of the ball-passing operation for internal inspection depends on the type of ball, the speed of the controlled operation, and the pressure of the driving medium. Generally, if you want to obtain a better internal inspection effect, the ball should be run at a near-constant speed in the pipeline. Too fast or too slow speed is not conducive to the internal inspection ball-passing operation. At present, there are many styles of balls. The research on the performance, running speed, and required driving pressure of the ball is often based on experience and has certain uncertainties. In addition, for the terminal low-volume gas pipeline, the internal inspection effect is poor and the ball is blocked due to the low gas flow rate. Summary of the invention

[0004] In order to solve the technical problems in the prior art such as the slow running speed of the ball under low flow rate conditions, resulting in poor internal detection effect and ball jamming, the present invention provides a control system and method for ball passing operation in gas pipelines.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A control system for detecting ball passing operations in a gas pipeline, comprising:

[0007] A starting device for issuing a ball-passing instruction;

[0008] A control device, used for generating a pressure reduction and speed increase control signal according to the ball passing instruction before the ball enters the gas pipeline section to be detected;

[0009] an execution device, configured to reduce the natural gas pressure in the gas pipeline section to be detected and increase the natural gas flow rate in the gas pipeline section to be detected according to the pressure reduction and speed increase control signal;

[0010] A data acquisition device, used for acquiring the moving speed of the sphere after the sphere enters the gas pipeline section to be detected;

[0011] The control device is also used to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball;

[0012] The execution device is also used to adjust the air pressure of the first station section according to the first station pressure regulation signal and to adjust the air pressure of the outlet section according to the outlet pressure regulation signal, so as to regulate the movement speed of the sphere; wherein the air pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be detected, and the air pressure of the outlet section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be detected.

[0013] The beneficial effects of the present invention are: by pre-adjusting the pressure reduction, the pressure in the pipeline is reduced, thereby achieving an increase in flow rate under the current flow rate conditions; controlling the speed of the sphere by adjusting the air pressure on both sides of the sphere can also effectively prevent blockage caused by too slow speed.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, the data acquisition device is also used to collect the flow rate of the downstream station of the gas pipeline section to be detected to obtain a real-time flow rate value;

[0016] The control device is specifically used to generate the pressure reduction and speed increase control signal according to the flow comparison value after receiving the ball passing instruction; wherein the flow comparison value is the difference between the real-time flow value and the preset flow threshold.

[0017] Furthermore, the control device is also specifically used to calculate the difference between the movement speed of the sphere and a preset sphere speed threshold to obtain a speed difference; and generate the first-station voltage regulation signal and the outbound voltage regulation signal according to the speed difference.

[0018] Furthermore, the execution device is also specifically used to adjust the air pressure of the first station section multiple times according to the first station pressure regulation signal and to adjust the air pressure of the outgoing section multiple times according to the outgoing pressure regulation signal, so as to control the movement speed of the ball.

[0019] Furthermore, each time the air pressure of the first station section is adjusted, the air pressure adjustment amount is the preset first station air pressure adjustment amount, and each time the air pressure of the exit section is adjusted, the air pressure adjustment amount is the preset exit air pressure adjustment amount.

[0020] Further, the execution device comprises:

[0021] A first station regulating valve, used for regulating the gas pressure of the first station section according to the first station pressure regulating signal;

[0022] The outlet regulating valve is used to adjust the outlet section air pressure according to the outlet pressure regulating signal.

[0023] Furthermore, the data acquisition device is also used to collect the position information of the sphere in the gas pipeline section to be detected;

[0024] The control device is also specifically used to determine the pressure regulation mode according to the position information; after determining the pressure regulation mode, generate the first-station pressure regulation signal and the outbound pressure regulation signal according to the movement speed of the sphere.

[0025] Furthermore, the voltage regulation mode is a stable section voltage regulation mode, a rising section voltage regulation mode, or a falling section voltage regulation mode;

[0026] When the control device determines that the pressure regulation mode is the stable section pressure regulation mode or the rising section pressure regulation mode, the execution device is further specifically used to adjust the air pressure difference between the air pressure of the first section and the air pressure of the outgoing section according to the first section pressure regulation signal and the outgoing section pressure regulation signal, so as to control the movement speed of the ball;

[0027] When the control device determines that the pressure regulation mode is the descending section pressure regulation mode, the execution device is further specifically used to shut down the supply of the outbound natural gas of the gas pipeline section to be detected according to the outbound pressure regulation signal and to adjust the gas pressure of the first station section according to the first station pressure regulation signal, so as to regulate the movement speed of the sphere.

[0028] Furthermore, the control device is also specifically used to construct a pipe section coordinate system; wherein the pipe section coordinate system is a two-dimensional coordinate system, the gas pipeline section to be detected is divided into multiple continuous pipe sections, the distance value between the end of each continuous pipe section and the cleaning station of the gas pipeline section to be detected along the gas transmission direction of the gas pipeline section to be detected represents the horizontal coordinate of the pipe section coordinate system, and the altitude of the end of each continuous pipe section represents the vertical coordinate of the pipe section coordinate system; the horizontal coordinate value of the end of each continuous pipe section close to the first station of the gas pipeline section to be detected represents the distance value of the head end of the continuous pipe section, and the horizontal coordinate value of the end of each continuous pipe section away from the first station of the gas pipeline section to be detected represents the distance value of the end of the continuous pipe section; the vertical coordinate value of the end of each continuous pipe section close to the first station of the gas pipeline section to be detected represents the height value of the head end of the continuous pipe section, and the vertical coordinate value of the end of each continuous pipe section away from the first station of the gas pipeline section to be detected represents the height value of the end of the continuous pipe section;

[0029] The control device is also specifically used to implant the position information into the pipe section coordinate system to obtain a sphere distance value; wherein the sphere distance value represents the axial distance between the sphere and the coordinate origin along the coordinate axis direction of the pipe section coordinate system;

[0030] The control device is also specifically used to compare the sphere distance value with the head end value and the end end value of each section of the continuous pipe segment respectively. When the sphere distance value is greater than the head end value of a certain section of the continuous pipe segment and less than or equal to the end end value, it is determined that the sphere is in the continuous pipe segment; the difference between the head end height value and the end end height value of the continuous pipe segment where the sphere is located is calculated to obtain the height difference value. If the height difference value is within the preset height difference range value, the pressure regulation mode is determined to be the stable section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is less than the end height value, the pressure regulation mode is determined to be the rising section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is greater than the end height value, the pressure regulation mode is determined to be the descending section pressure regulation mode.

[0031] In order to solve the above technical problems, the present invention also provides a method for controlling ball passing operation in a gas pipeline, and its specific technical contents are as follows:

[0032] A method for controlling a ball passing operation in a gas pipeline, which is applied to the above-mentioned control system for detecting a ball passing operation in a gas pipeline, comprises the following steps:

[0033] S1. Use the starting device to issue a ball passing instruction;

[0034] S2, before the ball enters the gas pipeline section to be detected, using the control device to generate a pressure reduction and speed increase control signal according to the ball passing instruction;

[0035] S3, using an execution device to reduce the natural gas pressure in the gas pipeline section to be tested and increase the natural gas flow rate in the gas pipeline section to be tested according to the pressure reduction and speed increase control signal;

[0036] S4, after the sphere enters the gas pipeline section to be inspected, using a data acquisition device to collect the movement speed of the sphere;

[0037] S5, using the control device to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball;

[0038] S6. Utilize the execution device to adjust the air pressure of the first station section according to the first station pressure regulation signal and to adjust the air pressure of the outgoing section according to the outgoing pressure regulation signal, so as to control the movement speed of the sphere; wherein the air pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be tested, and the air pressure of the outgoing section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1The structural principle framework of a control system for detecting ball passing in a gas pipeline according to an embodiment of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 2 The structural principle framework of a control system for detecting ball passing in a gas pipeline according to an embodiment of the present invention is shown in FIG. Figure 2 ;

[0041] Figure 3 Schematic diagram of the motion trajectory of a sphere in the gas pipeline section to be detected in an embodiment of the present invention;

[0042] Figure 4 The present invention is a flowchart of a method for controlling a ball passing operation in a gas pipeline according to an embodiment of the present invention.

[0043] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0044] 1-pipe cleaning station, 2-stable pipe section, 3-sphere, 4-downstream pipe section, 5-upstream pipe section, 6-downstream station. DETAILED DESCRIPTION

[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0046] like Figure 1 As shown, this embodiment provides a control system for detecting ball passing operations in a gas pipeline, comprising:

[0047] A starting device for issuing a ball-passing instruction;

[0048] A control device, used for generating a pressure reduction and speed increase control signal according to the ball passing instruction before the ball enters the gas pipeline section to be detected;

[0049] an execution device, configured to reduce the natural gas pressure in the gas pipeline section to be detected and increase the natural gas flow rate in the gas pipeline section to be detected according to the pressure reduction and speed increase control signal;

[0050] A data acquisition device, used for acquiring the moving speed of the sphere after the sphere enters the gas pipeline section to be detected;

[0051] The control device is also used to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball;

[0052] The execution device is also used to adjust the gas pressure of the first station section according to the first station pressure regulation signal and adjust the gas pressure of the outgoing section according to the outgoing pressure regulation signal, so as to control the movement speed of the sphere; wherein the gas pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be detected, and the gas pressure of the outgoing section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be detected. The starting device can be an electronic starter or a starting switch, etc.; the control device can be a controller or a single-chip microcomputer or an MCU.

[0053] In some embodiments, the data acquisition device is also used to collect the flow rate of the downstream station of the gas pipeline section to be detected to obtain a real-time flow rate value;

[0054] The control device is specifically used to generate the pressure reduction and speed increase control signal according to the flow comparison value after receiving the ball passing instruction; wherein the flow comparison value is the difference between the real-time flow value and the preset flow threshold.

[0055] The control device is also specifically used to calculate the difference between the movement speed of the ball and a preset ball speed threshold to obtain a speed difference; and generate the first-station voltage regulation signal and the outbound voltage regulation signal according to the speed difference.

[0056] In some embodiments, the execution device is further specifically used to adjust the air pressure of the first station section multiple times according to the first station pressure regulation signal and to adjust the air pressure of the outbound section multiple times according to the outbound pressure regulation signal to control the movement speed of the sphere.

[0057] Each time the air pressure of the first station section is adjusted, the air pressure adjustment amount is the preset first station air pressure adjustment amount, and each time the air pressure of the exit section is adjusted, the air pressure of the exit section is the preset exit air pressure adjustment amount. For example, during the operation, 2 kilometers before a valve chamber, the ball speed is 2.6m / s, and the preset first station air pressure adjustment amount is 0.1MPa. The operator increases the pressure by 0.1MPa every two minutes at the first station of the serve. After increasing the pressure for 6 times in a row, the first station exit pressure is continuously increased to 3.2MPa, which greatly improves the ball's ability to pass through the three-way of the valve chamber. In the end, the ball is delayed in the valve chamber for only 4 minutes, and the ejection speed after unblocking is only 4.8m / s. If this technology is not adopted, according to the situation of the previous round of foam balls passing through the jam, the ball in this round will be stuck there for 12 minutes. The longer the jam time, the greater the ejection speed. The ejection speed will exceed 8m / s, which can easily cause serious damage to the ball or even disintegration.

[0058] It can be seen that in the operation of passing the ball through the natural gas, if the ball is stuck in the pipeline for too long, the gas will accumulate in front of the ball, causing a large pressure difference between the front and the back. Once the blockage is unblocked, it is easy to form a catapult effect, which will damage the ball and the pipeline. The application of this technology follows the basic principle of "large pressure reduction and small pressure increase", and uses the principle of gas pressure reduction and expansion to increase the flow rate by reducing the pressure of the entire line. Before the pipeline is blocked, the pressure behind the ball is increased several times in advance to increase the pressure difference and increase the flow rate. The two measures are operated smoothly and alternately, solving the problem of passing the ball under ultra-low flow rate that has long plagued oil and gas pipelines. It not only greatly reduces the blocking time and improves the efficiency of passing the ball, but also ensures the integrity and safety of pipeline equipment and facilities and the ball itself, and will not affect the downstream gas supply.

[0059] like Figure 2 As shown, the execution device includes:

[0060] A first station regulating valve, used for regulating the gas pressure of the first station section according to the first station pressure regulating signal;

[0061] The outlet regulating valve is used to adjust the outlet section air pressure according to the outlet pressure regulating signal.

[0062] Among them, the first station regulating valve and the outlet regulating valve both adjust the corresponding first station section air pressure and outlet section air pressure by adjusting the valve opening.

[0063] The data acquisition device is also used to collect the position information of the sphere in the gas pipeline section to be detected; the control device is also specifically used to determine the pressure regulation mode according to the position information; after determining the pressure regulation mode, the first station pressure regulation signal and the outbound pressure regulation signal are generated according to the movement speed of the sphere.

[0064] In some embodiments, the voltage regulation mode is a stable voltage regulation mode, a rising voltage regulation mode, or a falling voltage regulation mode;

[0065] When the control device determines that the pressure regulation mode is the stable section pressure regulation mode or the rising section pressure regulation mode, the execution device is further specifically used to adjust the air pressure difference between the air pressure of the first section and the air pressure of the outgoing section according to the first section pressure regulation signal and the outgoing section pressure regulation signal, so as to control the movement speed of the ball;

[0066] When the control device determines that the pressure regulation mode is the descending section pressure regulation mode, the execution device is further specifically used to shut down the supply of the outbound natural gas of the gas pipeline section to be detected according to the outbound pressure regulation signal and to adjust the gas pressure of the first station section according to the first station pressure regulation signal, so as to regulate the movement speed of the sphere.

[0067] In some embodiments, the control device is further specifically used to construct a pipe section coordinate system; wherein the pipe section coordinate system is a two-dimensional coordinate system, the gas pipeline section to be detected is divided into multiple continuous pipe sections, the distance value between the end of each continuous pipe section and the cleaning station of the gas pipeline section to be detected along the gas transmission direction of the gas pipeline section to be detected represents the horizontal coordinate of the pipe section coordinate system, and the altitude of the end of each continuous pipe section represents the vertical coordinate of the pipe section coordinate system; the horizontal coordinate value of the end of each continuous pipe section close to the first station of the gas pipeline section to be detected represents the distance value of the head end of the continuous pipe section, and the horizontal coordinate value of the end of each continuous pipe section away from the first station of the gas pipeline section to be detected represents the distance value of the end of the continuous pipe section; the vertical coordinate value of the end of each continuous pipe section close to the first station of the gas pipeline section to be detected represents the height value of the head end of the continuous pipe section, and the vertical coordinate value of the end of each continuous pipe section away from the first station of the gas pipeline section to be detected represents the height value of the end of the continuous pipe section;

[0068] The control device is also specifically used to implant the position information into the pipe section coordinate system to obtain a sphere distance value; wherein the sphere distance value represents the axial distance between the sphere and the coordinate origin along the coordinate axis direction of the pipe section coordinate system.

[0069] By constructing a coordinate system, the continuous pipe section where the sphere is located can be clearly calculated through the coordinate coefficient value; at the same time, the type of the continuous pipe section can be determined through the coordinate values ​​at both ends of the continuous pipe section, so as to select the appropriate pressure regulation mode according to the type of the continuous pipe section, so as to improve the rationality of pressure regulation, prevent the sphere from getting stuck, and improve the cleaning efficiency and cleaning effect of the sphere.

[0070] The control device is also specifically used to compare the sphere distance value with the head end value and the end end value of each section of the continuous pipe segment respectively. When the sphere distance value is greater than the head end value of a certain section of the continuous pipe segment and less than or equal to the end end value, it is determined that the sphere is in the continuous pipe segment; the difference between the head end height value and the end end height value of the continuous pipe segment where the sphere is located is calculated to obtain the height difference value. If the height difference value is within the preset height difference range value, the pressure regulation mode is determined to be the stable section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is less than the end height value, the pressure regulation mode is determined to be the rising section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is greater than the end height value, the pressure regulation mode is determined to be the descending section pressure regulation mode.

[0071] When the fiber optic detection technology detects that the ball is about to move to an uphill section, the dynamic pressure boost method is used, the output changes monitored by the station control center are taken into consideration, and the automatic control system is used to automatically adjust the valve opening of the first serving station multiple times with different amplitudes to increase the outlet pressure of the first serving station to increase the front and rear pressure difference of the ball, alleviate the output fluctuation and the ball speed drop caused by the rising terrain and the ball climbing the slope, make the ball speed as close to the average speed as possible, and avoid the risk of stopping or getting stuck.

[0072] When the fiber optic detection technology detects that the ball is about to move to the downhill section, the stop supply and pressure reduction method is flexibly applied, and the automatic control system is used to select the high-flow time point based on the flow monitoring data of the station control center, close the downstream valve of the first station of the ball, and use the stop supply method to reduce the pipeline pressure, slow down the pressure difference before and after the ball, and control the speed of the ball to avoid its too fast speed and cause impact damage to the pipeline equipment. At the same time, while providing space for subsequent pressure regulation, it also creates conditions for the ball to speed up again.

[0073] The emergence of this technology has significantly improved the efficiency and safety of ball detection operations in gas pipelines. Through the principle of dynamic pressure regulation, combined with the automatic control system to adjust the valve opening in advance, the pre-pressure increase and decrease method successfully controls the difference in the running speed of the ball when going uphill and downhill, effectively reducing the unstable factors in operation. The method of adjusting the valve opening in advance allows the system to make timely adjustments in different sections of the pipeline according to the actual situation of the pipeline, avoiding the problem of the ball speed being too fast or too slow due to improper valve adjustment, and ensuring the continuity and efficiency of the ball passing operation. Pre-pressure increase and decrease effectively balances the running speed of the ball in the pipeline and the pressure difference before and after, thereby ensuring the stable operation of the ball to the greatest extent. This method not only improves the safety of ball passing operations, but also greatly reduces equipment damage and operation risks, and escorts the long-term operation safety of gas pipelines.

[0074] like Figure 3As shown, in the gas pipeline section to be detected, the cleaning station 1 represents the first station or upstream control station of the gas pipeline section to be detected, and the downstream station 6 represents the first station or upstream control station or exit station of the gas pipeline section to be detected; the sphere 3 usually adopts a spherical cleaner to facilitate moving cleaning in the gas pipeline; the above-mentioned continuous pipe section usually includes three types of pipe sections, namely, a stable pipe section 2, a descending pipe section 4 and an ascending pipe section 5, and the height difference between the two ends of the stable pipe section 2 is within the preset height difference range value; the end of the descending pipe section 4 close to the cleaning station 1 is obviously higher than the other end, that is, the height difference between the two ends of the descending pipe section 4 is outside the preset height difference range value, and the height of the end of the descending pipe section 4 close to the cleaning station 1 is higher than the height of the descending pipe section 4. The height of the end of the pipe section 4 away from the cleaning station 1; the end of the rising pipe section 5 close to the cleaning station 1 is obviously lower than the other end, that is, the height difference between the two ends of the rising pipe section 5 is outside the preset height difference range, and the height of the end of the rising pipe section 5 close to the cleaning station 1 is lower than the height of the end of the rising pipe section 5 away from the cleaning station 1; when the sphere 3 moves into the stable pipe section 2, the control device determines that the pressure regulation mode is the stable section pressure regulation mode; when the sphere 3 moves into the descending pipe section 4, the control device determines that the pressure regulation mode is the descending section pressure regulation mode; when the sphere 3 moves into the rising pipe section 5, the control device determines that the pressure regulation mode is the ascending section pressure regulation mode.

[0075] Taking the ball-passing operation in a long-distance gas pipeline as an example, there are multiple sections with different slopes between two adjacent valve chambers in the pipeline section; the two valve chambers are the above-mentioned cleaning station 1 and downstream station 6. Before the ball-passing operation, the system sets the dynamic pressure regulation parameters of each section according to the pipeline terrain and actual conditions, including valve opening and preset pressure. During the ball-passing operation, the sensor monitors the pressure and ball position in the pipeline in real time, and the control device adjusts the control valve according to the monitoring data to keep the ball running at a stable speed in each slope section. In the actual process, this technology is applied, and the ball climbing retention time is significantly shortened, and the running speed is improved to a certain extent; during the downhill process, the ball running speed can be better controlled below 5m / s, ensuring the safe and stable operation of various equipment.

[0076] The embodiment of the present invention reduces the pressure in the pipeline by pre-adjusting the pressure reduction, thereby increasing the flow rate under the current flow rate conditions; the flow rate control technology can improve the ball passing efficiency and reduce equipment wear. Controlling the speed of the ball by adjusting the air pressure on both sides of the ball can effectively prevent the jamming caused by too slow speed.

[0077] like Figure 4 As shown, in some other embodiments, this embodiment also provides a method for controlling a ball passing operation in a gas pipeline, comprising the following steps:

[0078] S1. Use the starting device to issue a ball passing instruction;

[0079] S2, before the ball enters the gas pipeline section to be detected, using the control device to generate a pressure reduction and speed increase control signal according to the ball passing instruction;

[0080] S3, using an execution device to reduce the natural gas pressure in the gas pipeline section to be tested and increase the natural gas flow rate in the gas pipeline section to be tested according to the pressure reduction and speed increase control signal;

[0081] S4, after the sphere enters the gas pipeline section to be inspected, using a data acquisition device to collect the movement speed of the sphere;

[0082] S5, using the control device to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball;

[0083] S6. Utilize the execution device to adjust the air pressure of the first station section according to the first station pressure regulation signal and to adjust the air pressure of the outgoing section according to the outgoing pressure regulation signal, so as to control the movement speed of the sphere; wherein the air pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be tested, and the air pressure of the outgoing section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be tested.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for detecting ball passing in a gas pipeline, characterized in that: include: A starting device for issuing a ball-passing instruction; A control device, used for generating a pressure reduction and speed increase control signal according to the ball passing instruction before the ball enters the gas pipeline section to be detected; an execution device, configured to reduce the natural gas pressure in the gas pipeline section to be detected and increase the natural gas flow rate in the gas pipeline section to be detected according to the pressure reduction and speed increase control signal; A data acquisition device, used for acquiring the moving speed of the sphere after the sphere enters the gas pipeline section to be detected; The control device is also used to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball; The execution device is also used to adjust the air pressure of the first station section according to the first station pressure regulation signal and to adjust the air pressure of the outlet section according to the outlet pressure regulation signal, so as to regulate the movement speed of the sphere; wherein the air pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be detected, and the air pressure of the outlet section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be detected.

2. The ball-passing operation control system for detecting the ball passing operation in the gas pipeline according to claim 1 is characterized in that: The data acquisition device is also used to collect the flow rate of the downstream station of the gas pipeline section to be detected to obtain a real-time flow rate value; The control device is specifically used to generate the pressure reduction and speed increase control signal according to the flow comparison value after receiving the ball passing instruction; wherein the flow comparison value is the difference between the real-time flow value and the preset flow threshold.

3. The ball-passing operation control system for detecting the ball passing operation in the gas pipeline according to claim 2 is characterized in that: The control device is also specifically used to calculate the difference between the movement speed of the ball and a preset ball speed threshold to obtain a speed difference; and generate the first-station voltage regulation signal and the outbound voltage regulation signal according to the speed difference.

4. The ball-passing operation control system for detecting the ball passing operation in the gas pipeline according to claim 2, characterized in that: The execution device is also specifically used to adjust the air pressure of the first station section multiple times according to the first station pressure regulation signal and adjust the air pressure of the outbound section multiple times according to the outbound pressure regulation signal to control the movement speed of the ball.

5. The control system for detecting ball passing in gas pipeline according to claim 4, characterized in that: Each time the air pressure of the first station section is adjusted, the air pressure adjustment amount is the preset first station air pressure adjustment amount, and each time the air pressure of the exit section is adjusted, the air pressure adjustment amount is the preset exit air pressure adjustment amount.

6. The control system for detecting ball passing in gas pipeline according to claim 1, characterized in that: The execution device comprises: A first station regulating valve, used for regulating the gas pressure of the first station section according to the first station pressure regulating signal; The outlet regulating valve is used to adjust the outlet section air pressure according to the outlet pressure regulating signal.

7. The control system for detecting ball passing in a gas pipeline according to claim 6, characterized in that: The data acquisition device is also used to collect the position information of the sphere in the gas pipeline section to be detected; The control device is also specifically used to determine the pressure regulation mode according to the position information; after determining the pressure regulation mode, generate the first-station pressure regulation signal and the outbound pressure regulation signal according to the movement speed of the sphere.

8. The control system for detecting ball passing in a gas pipeline according to claim 7, characterized in that: The voltage regulation mode is a stable section voltage regulation mode, an ascending section voltage regulation mode, or a descending section voltage regulation mode; When the control device determines that the pressure regulation mode is the stable section pressure regulation mode or the rising section pressure regulation mode, the execution device is further specifically used to adjust the air pressure difference between the air pressure of the first section and the air pressure of the outgoing section according to the first section pressure regulation signal and the outgoing section pressure regulation signal, so as to control the movement speed of the ball; When the control device determines that the pressure regulation mode is the descending section pressure regulation mode, the execution device is further specifically used to shut down the supply of the outbound natural gas of the gas pipeline section to be detected according to the outbound pressure regulation signal and to adjust the gas pressure of the first station section according to the first station pressure regulation signal, so as to regulate the movement speed of the sphere.

9. The control system for detecting ball passing in a gas pipeline according to claim 8, characterized in that: The control device is also specifically used to construct a pipe section coordinate system; wherein the pipe section coordinate system is a two-dimensional coordinate system, the gas pipeline section to be detected is divided into multiple continuous pipe sections, the distance value between the end of each continuous pipe section and the cleaning station of the gas pipeline section to be detected along the gas transmission direction of the gas pipeline section to be detected represents the horizontal coordinate of the pipe section coordinate system, and the altitude of the end of each continuous pipe section represents the vertical coordinate of the pipe section coordinate system; the horizontal coordinate value of one end of each continuous pipe section close to the cleaning station of the gas pipeline section to be detected represents the distance value of the head end of the continuous pipe section, and the horizontal coordinate value of one end of each continuous pipe section away from the cleaning station of the gas pipeline section to be detected represents the distance value of the end of the continuous pipe section; the vertical coordinate value of one end of each continuous pipe section close to the cleaning station of the gas pipeline section to be detected represents the height value of the head end of the continuous pipe section, and the vertical coordinate value of one end of each continuous pipe section away from the cleaning station of the gas pipeline section to be detected represents the height value of the end of the continuous pipe section; The control device is also specifically used to implant the position information into the pipe section coordinate system to obtain a sphere distance value; wherein the sphere distance value represents the axial distance between the sphere and the coordinate origin along the coordinate axis direction of the pipe section coordinate system; The control device is also specifically used to compare the sphere distance value with the head end value and the end end value of each section of the continuous pipe segment respectively. When the sphere distance value is greater than the head end value of a certain section of the continuous pipe segment and less than or equal to the end end value, it is determined that the sphere is in the continuous pipe segment; the difference between the head end height value and the end end height value of the continuous pipe segment where the sphere is located is calculated to obtain the height difference value. If the height difference value is within the preset height difference range value, the pressure regulation mode is determined to be the stable section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is less than the end height value, the pressure regulation mode is determined to be the rising section pressure regulation mode; if the height difference value is outside the preset height difference range value and the head end height value of the continuous pipe segment is greater than the end height value, the pressure regulation mode is determined to be the descending section pressure regulation mode.

10. A method for controlling ball passing operation in a gas pipeline, characterized in that: The control system for detecting ball passing in a gas pipeline as claimed in any one of claims 1 to 9 comprises the following steps: S1. Use the starting device to issue a ball passing instruction; S2, before the ball enters the gas pipeline section to be detected, using the control device to generate a pressure reduction and speed increase control signal according to the ball passing instruction; S3, using an execution device to reduce the natural gas pressure in the gas pipeline section to be tested and increase the natural gas flow rate in the gas pipeline section to be tested according to the pressure reduction and speed increase control signal; S4, after the sphere enters the gas pipeline section to be inspected, using a data acquisition device to collect the movement speed of the sphere; S5, using the control device to generate a first-station voltage regulation signal and an outbound voltage regulation signal according to the movement speed of the ball; S6. Utilize the execution device to adjust the air pressure of the first station section according to the first station pressure regulation signal and to adjust the air pressure of the outgoing section according to the outgoing pressure regulation signal, so as to control the movement speed of the sphere; wherein the air pressure of the first station section is the natural gas pressure in the pipe section between the sphere and the cleaning station of the gas pipeline section to be tested, and the air pressure of the outgoing section is the natural gas pressure in the pipe section between the sphere and the downstream station of the gas pipeline section to be tested.

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