A Pressure Regulation Method and Filling System for Deep Well Pipelines

Abstract

An embodiment of the present invention discloses a method for regulating pressure in a deep well pipeline and a filling system, which relates to the technical fields of filling and pipeline pressure detection and regulation. The method includes: during the process of starting a filling pump to fill a goaf with filling slurry through a main pipeline, collecting the pressure value in the first branch pipeline through a first pressure sensor in the first branch pipeline, and sending the pressure value in the first branch pipeline to a control device; when the control device determines that the pressure value in the first branch pipeline is greater than a preset pressure limit value, controlling to open a first electric high-pressure ball valve to discharge the filling slurry to a first sewage disposal tank for pressure relief; and increasing the opening degree of a first electric gate valve on the main pipeline to expand the flow cross-sectional area. The present invention is applicable to the scenario of pressure monitoring and regulation in a deep well pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of filling and pipeline pressure detection and regulation, and particularly to a method for regulating pressure in a deep well pipeline and a filling system. Background Art

[0002] In the filling of deep wells (well depth > 600m), the technology of pipeline pressure monitoring and regulation is the core link to ensure the safe operation of the conveying system in fields such as petroleum, natural gas, chemical engineering, and municipal engineering. With the complexity of industrial scenarios, pipelines need to withstand long-term challenges such as high pressure, corrosion, and impurity deposition. In scenarios with high-viscosity or solid-containing media, it is difficult to ensure the regulation accuracy and cope with sudden pressure fluctuations. If the pressure in the pipeline is not adjusted in time, abnormal pressure in the pipeline may occur, leading to leakage, pipe burst, and even safety accidents. Summary of the Invention

[0003] In view of this, the present invention provides a method for regulating pressure in a deep well pipeline and a filling system to improve the pressure relief speed when the pressure in the pipeline is abnormal.

[0004] In a first aspect, the present invention provides a method for regulating pressure in a deep well pipeline, including: during the process of starting a filling pump to fill a goaf with filler slurry through a main pipeline, collecting the pressure value in the first branch pipeline through a first pressure sensor in the first branch pipeline and sending the pressure value in the first branch pipeline to a control device; wherein, the first branch pipeline is located on a branch of the main pipeline and is connected to the main pipeline, and the probe of the first pressure sensor is installed facing the center of the main pipeline; when the control device determines that the pressure value in the first branch pipeline is greater than a preset pressure limit value, controlling to open a first electric high-pressure ball valve to discharge the filler slurry to a first sewage disposal tank for pressure relief; and increasing the opening degree of a first electric gate valve on the main pipeline to expand the flow cross-sectional area; the first sewage disposal tank is connected to the first branch pipeline through a first sewage pipeline, the first electric high-pressure ball valve is arranged in the first sewage pipeline, and the first electric gate valve is arranged in the main pipeline and is located downstream of the first branch pipeline.

[0005] Optionally, more than two pressure monitoring and control nodes are deployed along the main pipeline; each pressure monitoring and control node includes a branch pipeline connected to the main pipeline, a pressure sensor provided in the branch pipeline, a sewage pipeline, a sewage tank connected to the branch pipeline through the sewage pipeline, an electric high-pressure ball valve provided in the sewage pipeline, and an electric gate valve provided downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage pipeline, the first sewage tank, the first electric high-pressure ball valve and the first electric gate valve constitute a first pressure monitoring and control node; wherein, in During the process of starting the filling pump to fill the goaf with slurry through the main pipeline, the method also includes: receiving the pressure value uploaded by the pressure sensor of each pressure monitoring and control node through the control device; when the pressure value of the first pressure monitoring and control node is monitored to be greater than the preset pressure limit value, the adjacent pressure monitoring and control nodes are linked and controlled according to the following rules: reducing the opening of the electric gate valve of the upstream node adjacent to the first pressure monitoring and control node, and increasing the opening of the electric gate valve of the downstream node adjacent to the first pressure monitoring and control node, until the pressure value of the first pressure monitoring and control node returns to normal.

[0006] Optionally, the method further includes: detecting the ambient temperature using a temperature sensor; determining a pressure impact value based on the ambient temperature, and determining an actual pressure value based on the pressure impact value and the pressure value collected by the first pressure sensor.

[0007] Optionally, the method further includes: during the pressure relief process, dynamically adjusting the displacement of the filling pump according to the pressure value attenuation rate, and synchronously adjusting the configuration concentration of the filling slurry; when it is monitored that the pressure value is lower than the safety threshold, controlling the closure of the first electric high-pressure ball valve to terminate the pressure relief; restoring the opening of the first electric gate valve to the initial working state, controlling the displacement of the filling pump to increase step by step to the maximum, and continuing filling.

[0008] Optionally, the method further includes: when a cleaning control signal is triggered, controlling the closing of the first electric gate valve located on the main pipeline, and simultaneously opening the first electric high-pressure ball valve, flushing the cleaning fluid into the first branch pipeline through the filling pump to flush the probe of the first pressure sensor, the wall of the first branch pipeline and the wall of the first sewage pipeline, so as to discharge the flushing waste into the first sewage tank.

[0009] Second aspect, the present invention provides a filling system for deep well pipelines, comprising: a main pipeline, a first branch pipeline, a filling pump, a sewage disposal pit, a control device, a first pressure sensor, and a first regulating valve group assembly; the filling pump is connected to the main pipeline, the first branch pipeline is located on a branch of the main pipeline and is communicated with the main pipeline; the axis of the first branch pipeline is vertically and intersectingly arranged with the axis of the main pipeline; the first pressure sensor is arranged at one end of the first branch pipeline far from the main pipeline, and the probe of the first pressure sensor is installed towards the center of the main pipeline; the first regulating valve group assembly includes: a first electric high-pressure ball valve and a first electric gate valve; the first electric high-pressure ball valve is arranged on a first sewage discharge pipeline, the first sewage discharge pipeline is arranged at one end of the first branch pipeline far from the main pipeline and is communicated with the sewage disposal pit; the first electric gate valve is arranged on the main pipeline, behind the intersection of the main pipeline and the first branch pipeline; the filling pump, the first pressure sensor, and the first regulating valve group assembly are electrically connected to the control device.

[0010] Optionally, more than two pressure monitoring and control nodes are deployed along the main pipeline; each pressure monitoring and control node includes a branch pipeline communicated with the main pipeline, a pressure sensor arranged in the branch pipeline, a sewage discharge pipeline, a sewage disposal pit communicated with the branch pipeline through the sewage discharge pipeline, an electric high-pressure ball valve arranged in the sewage discharge pipeline, and an electric gate valve arranged downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage discharge pipeline, the first sewage disposal pit, the first electric high-pressure ball valve, and the first electric gate valve form a first pressure monitoring and control node.

[0011] The present invention provides a method for regulating the pressure in a deep well pipeline and a filling system. The pressure value in the first branch pipeline is collected by the first pressure sensor in the first branch pipeline and sent to the control device, avoiding the direct impact of the filling slurry in the main pipeline on the pressure sensor, and improving the accuracy and service life of the pressure sensor; when the control device determines that the pressure value in the first branch pipeline is greater than the preset pressure limit value, it controls the opening of the first electric high-pressure ball valve to discharge the filling slurry to the first sewage disposal pit for pressure relief; and increases the opening degree of the first electric gate valve on the main pipeline to expand the flow cross-sectional area and improve the pressure relief speed when the pressure in the pipeline is abnormal, avoiding pipeline leakage, pipe burst, or safety accidents; the control device performs real-time coordinated control on the pressure sensor, the electric high-pressure ball valve, the electric gate valve, and the filling pump. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 Schematic diagram of the process of a method for regulating pressure in a deep well pipeline according to an embodiment of the present invention;

[0014] Figure 2 Schematic diagram of the structure of a deep well pipeline filling system according to an embodiment of the present invention;

[0015] Figure 3 Schematic diagram of the structure of the first node of a deep well pipeline filling system according to an embodiment of the present invention;

[0016] In the figure: 1, main pipeline; 2, first branch pipeline; 3, filling pump; 4, first sewage pool; 5, control device; 6, first pressure sensor; 7, first regulating valve group assembly; 71, first electric high-pressure ball valve; 72, first electric gate valve; 8, first sewage pipeline. Detailed implementation manners

[0017] The following will describe the embodiments of the present invention in detail with reference to the drawings.

[0018] It should be clear that the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0019] Embodiment 1:

[0020] Figure 1 Schematic diagram of the process of a method for regulating pressure in a deep well pipeline of the present invention. Refer to Figure 1 , the present invention provides a method for regulating pressure in a deep well pipeline, including:

[0021] S1. During the process of starting the filling pump to fill the goaf with filler slurry through the main pipeline, collect the pressure value in the first branch pipeline through the first pressure sensor in the first branch pipeline, and send the pressure value in the first branch pipeline to the control device; wherein, the first branch pipeline is located on the branch of the main pipeline and is connected to the main pipeline, and the probe of the first pressure sensor is installed facing the center of the main pipeline.

[0022] In this step, during the process of backfill slurry flowing through the main pipeline into the goaf, the first branch pipeline is located on the branch of the main pipeline and is connected to the main pipeline. The probe of the first pressure sensor is installed in the first branch pipeline facing the center of the main pipeline. The first pressure sensor obtains the pressure value in the first branch pipeline according to the principle of Boyle's law. The formula of Boyle's law is: p , avoiding the direct impact and abrasion of the high-speed flowing backfill slurry in the main pipeline on the pressure sensor during the monitoring process, and improving the accuracy and service life of the pressure sensor.

[0023] S2. When the control device determines that the pressure value in the first branch pipeline is greater than the preset pressure limit value, it controls the opening of the first electric high-pressure ball valve to discharge the backfill slurry into the first sewage disposal tank for pressure relief; and, increases the opening degree of the first electric gate valve on the main pipeline to expand the flow cross-sectional area; the first sewage disposal tank is connected to the first branch pipeline through the first sewage pipeline. The first electric high-pressure ball valve is installed in the first sewage pipeline, and the first electric gate valve is installed in the main pipeline and is located downstream of the first branch pipeline.

[0024] In this step, when the control device determines that the pressure value in the first branch pipeline is greater than the preset pressure limit value, the control device controls the opening of the first electric high-pressure ball valve, so that the backfill slurry is discharged from the first branch pipeline and the first sewage pipeline into the sewage disposal tank for rapid pressure relief; at the same time, it controls the increase of the opening degree of the first electric gate valve on the main pipeline, such as increasing from 30% to 60%, to expand the flow cross-sectional area of the main pipeline, reduce the local resistance in the main pipeline, enable the backfill slurry to be quickly discharged, reduce the pressure in the main pipeline, improve the pressure relief speed when the pressure in the pipeline is abnormal, and avoid leakage, pipe burst or safety accidents; the first electric high-pressure ball valve is installed in the first sewage pipeline. When the first electric high-pressure ball valve is opened, the backfill slurry and cleaning fluid in the first branch pipeline can flow through the first sewage pipeline into the first sewage disposal tank.

[0025] In some embodiments, more than two pressure monitoring and control nodes are deployed along the main pipeline; each pressure monitoring and control node includes a branch pipeline communicating with the main pipeline, a pressure sensor arranged in the branch pipeline, a sewage discharge pipeline, a sewage discharge tank communicating with the branch pipeline through the sewage discharge pipeline, an electric high-pressure ball valve arranged in the sewage discharge pipeline, and an electric gate valve arranged downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage discharge pipeline, the first sewage discharge tank, the first electric high-pressure ball valve and the first electric gate valve form the first pressure monitoring and control node; wherein, in the process of starting the filling pump to fill the goaf with filling slurry through the main pipeline, the method further includes: receiving, by a control device, the pressure values uploaded by the pressure sensors of each pressure monitoring and control node; when it is monitored that the pressure value of the first pressure monitoring and control node is greater than a preset pressure limit value, the adjacent pressure monitoring and control nodes are controlled in a linked manner according to the following rules: reducing the opening degree of the electric gate valve of the upstream node adjacent to the first pressure monitoring and control node, and increasing the opening degree of the electric gate valve of the downstream node adjacent to the first pressure monitoring and control node until the pressure value of the first pressure monitoring and control node returns to normal.

[0026] In this step, the pressure sensors of each node can be respectively connected to the control device and the cloud platform through a network to achieve global pressure balance optimization. The pressure distribution of the entire pipeline section is monitored by networking the pressure sensors of multiple nodes. When any node is overpressured, the opening degrees of the electric gate valves of the upstream node and the downstream node are adjusted in coordination to improve the response speed and pressure relief speed for pressure mutation situations; in the process of starting the filling pump to fill the goaf with filling slurry through the main pipeline, the method may further include: receiving, by the control device, the pressure values in the branch pipelines of each node collected and uploaded by each pressure sensor in real time, calculating the actual pressure values in the branch pipelines of each node, and at the same time, the control device records the real-time pressure values, analyzes the historical pressure curve through an algorithm, predicts the risk of pipe blockage and starts the pressure relief operation in advance; when it is monitored that the actual pressure value of any node is greater than the preset pressure limit value, the adjacent pressure monitoring and control nodes are controlled in a linked manner according to the following rules: reducing the opening degree of the electric gate valve of the upstream node adjacent to the first node, and increasing the opening degree of the electric gate valve of the downstream node adjacent to the first node, reducing the resistance of the downstream pipeline node, and realizing coordinated joint adjustment until the pressure value of the first node returns to normal. After the fault is eliminated, the opening degrees of the electric high-pressure ball valve and the electric gate valve of the adjacent nodes upstream and downstream of the first node are gradually restored to resume the normal filling process; the distributed deployment of pressure sensors supports the global pressure optimization of complex pipelines, especially suitable for filling scenarios with long distances and multiple branches.

[0027] In some embodiments, the method may further include: detecting the ambient temperature by using a temperature sensor; determining a pressure influence value based on the ambient temperature, and determining the actual pressure value based on the pressure influence value and the pressure value collected by the first pressure sensor.

[0028] In this step, the temperature will have a thermal expansion effect on the first branch pipeline, the first pressure sensor, and the cavity between the first pressure sensor and the first branch pipeline, resulting in errors. The temperature sensor is used to detect the ambient temperature data near the first pressure sensor and send the temperature data to the control device. The control device determines the pressure influence value of the temperature on the pressure sensor based on the ambient temperature data. According to the piecewise linear fitting algorithm, the pressure influence value, and the pressure value collected by the first pressure sensor, the actual pressure value in the first branch pipeline is calculated to improve the accuracy of the pressure value collected by the pressure sensor.

[0029] In some embodiments, the method may further include: during the pressure relief process, dynamically adjusting the displacement of the filling pump according to the pressure value decay rate and synchronously adjusting the configuration concentration of the filling slurry; when it is monitored that the pressure value is lower than the safety threshold, controlling to close the first electric high-pressure ball valve to terminate the pressure relief; restoring the opening degree of the first electric gate valve to the initial working state and controlling the displacement of the filling pump to increase step by step to the maximum to continue filling.

[0030] In this step, during the pressure relief process, the displacement of the filling pump is dynamically adjusted according to the pressure value decay rate. For example, it is reduced from 100% to 70%, reducing the flow rate of the filling slurry input into the main pipeline. At the same time, the concentration of the filling slurry is synchronously adjusted and optimized. For example, the water-cement ratio is reduced by 15%, reducing the viscosity of the filling slurry, further reducing the fluid resistance, increasing the flow rate of the filling slurry, avoiding blockage in the pipeline, improving the stability of pressure regulation in the pipeline, and avoiding damage to the pipeline, sensors, electric high-pressure ball valve, and electric gate valve caused by the water hammer effect due to excessive pressure change rate in the pipeline, and improving the stability of pressure relief when the pressure in the pipeline is abnormal.

[0031] When the pressure value drops below the safety threshold, the control device controls to close the first electric high-pressure ball valve to terminate the pressure relief operation.

[0032] After terminating the pressure relief, the opening degree of the first electric gate valve is restored step by step to the initial working state, such as from 60% to 30%, and the displacement of the filling pump is controlled to increase step by step to the maximum, such as from 75% → 85% → 100%, to ensure that the pressure in the main pipeline and the first branch pipeline transitions smoothly to the normal operation range and continue the filling process, avoiding damage to the pipeline and the devices inside the pipeline caused by sudden pressure changes in the pipeline.

[0033] In some embodiments, the method further includes: when a cleaning control signal is triggered, controlling to close the first electric gate valve located on the main pipeline and simultaneously opening the first electric high-pressure ball valve. The cleaning fluid is flushed into the first branch pipeline through the filling pump to scour the probe of the first pressure sensor, the pipe wall of the first branch pipeline, and the pipe wall of the first sewage pipeline, so as to discharge the flushing dirt to the first sewage pond.

[0034] In this step, when it is necessary to clean the first pressure sensor and the first branch pipeline, a cleaning control signal is triggered. The control device controls the closing of the first electric gate valve located in the main pipeline to block the downward flow of the cleaning fluid in the main pipeline, switches the cleaning fluid to conduct into the first sewage pipeline, and at the same time fully opens the first electric high-pressure ball valve located on the first sewage pipeline. The filling pump is only connected to the cleaning fluid source, and the filling pump is started to output cleaning fluid (pressure ≥ 3 MPa) into the main pipeline, flushing the cleaning fluid into the first branch pipeline and the first sewage pipeline, scouring the wall of the first branch pipeline, the first pressure sensor, the wall of the first sewage pipeline, and the valve cavity of the first electric high-pressure ball valve, removing the sediment attached to the pressure sensor probe, the wall of the first branch pipeline, the wall of the first sewage pipeline, and the valve cavity of the first electric high-pressure ball valve, and discharging it to the first sewage pond; after the flushing is completed, the first sewage pond collects and discharges the waste liquid to the underground drainage ditch; after the cleaning is completed, the control device checks the accuracy and signal stability of the first pressure sensor and the temperature sensor. If the check is abnormal, secondary cleaning is triggered or an alarm is given to remind the staff to handle it; it is possible to clean the walls of the main pipeline, the first branch pipeline, and the first sewage pipeline, as well as the pressure sensors and valve cavities therein, without shutting down the machine, and there is no need to separately clean the pressure sensors in the pipeline, avoiding the operation interruption caused by shutting down the machine for blockage cleaning in the traditional solution and reducing economic losses. For example, in the coal mine grouting scenario, the traditional shutdown for blockage cleaning results in a loss of more than 100,000 yuan per hour.

[0035] In some embodiments, when adjusting the opening degree of the electric gate valve, it further includes: collecting the real-time flow rate of the filling slurry at the cross-section of the pipeline where the flow sensor is located and sending it to the control device; when the control device monitors that the mutation of the real-time flow rate exceeds the safety flow rate threshold, adjusting the opening degree amplitude in advance according to the preset opening degree adjustment strategy; and dynamically correcting the opening degree control response curve according to the yield stress and viscosity μ of the filling slurry to adapt to the flow rate and pressure changes.

[0036] In this step, when adjusting the opening degree of the electric gate valve, taking the flow sensor data as a feedforward signal, when the flow rate mutation exceeds the threshold ( ), adjusting the opening degree compensation of the electric gate valve in advance, for every of the flow rate, the corresponding opening degree of the electric gate valve is .

[0037] In some embodiments, the main pipeline may have multiple branch pipelines. For multiple branch pipelines, when allocating the opening degree adjustment weights of the electric gate valves of each branch, the opening degree adjustment weights of the electric gate valves are allocated according to the proportion of the cross-sectional areas of each branch pipeline. For example, the first branch pipeline accounts for 70% and the second branch pipeline accounts for 30%, avoiding the global pressure fluctuation of the pipeline caused by single-node adjustment.

[0038] In some embodiments, a flow deflector is installed at the elbow of the main pipeline. In combination with the stepped adjustment of the opening of the electric gate valve (the change in the opening of each stage of the electric gate valve ≤ 5%), the Reynolds number is controlled in the laminar-turbulent transition zone (Re = 2000 - 4000), reducing the erosion risk of the filling slurry to the pipeline elbow.

[0039] Embodiment 2:

[0040] Figure 2 This is a schematic structural diagram of a deep well pipeline filling system according to an embodiment of the present invention. As Figure 2 shown, the present invention provides a filling system for a deep well pipeline, including: a main pipeline 1, a first branch pipeline 2, a filling pump 3, a first sewage pool 4, a control device 5, a first pressure sensor 6, and a first regulating valve group assembly 7.

[0041] The main pipeline 1 serves as the main filling slurry transportation channel. The filling pump 3 is connected to the main pipeline 1. The first branch pipeline 2 is located on a branch of the main pipeline 1 and is connected to the main pipeline 1; the axis of the first branch pipeline 2 is perpendicularly intersecting with the axis of the main pipeline 1.

[0042] A temperature sensor (not shown in the figure) is integrated on the first pressure sensor 6. Both the temperature sensor and the first pressure sensor 6 are electrically connected to the control device 5. The filling pump 3 and the first regulating valve group assembly 7 are electrically connected to the control device 5. The control device 5 receives the data from the pressure sensor 6 and the temperature sensor to accurately control the output flow of the filling pump 3, the first regulating valve group assembly 7 to relieve pressure, restore the normal filling process, and clean the branch pipelines, pressure sensors, sewage pipelines, electric high-pressure ball valves, and electric gate valves at each node; the first pressure sensor 6 is arranged at one end of the first branch pipeline 2 far from the main pipeline 1, and the probe of the first pressure sensor 6 is installed in the first branch pipeline 2 facing the center of the main pipeline 1, facilitating the detection of the pressure of the filling slurry flowing into the first branch pipeline 2 from the main pipeline 1. Figure 3 This is a schematic structural diagram of the first node of a deep well pipeline filling system according to an embodiment of the present invention. Refer to Figure 3 , the first branch pipeline 2 includes a first cavity and a second cavity. The inner diameter of the second cavity is smaller than that of the first cavity. The second cavity is located above the first cavity. The first cavity and the second cavity are an integrated structure in communication; the volume of the second cavity of the first branch pipeline 2 and the volume of the first cavity of the first branch pipeline 2 sum to a fixed value. When the filling slurry enters the first branch pipeline 2 and compresses the gas in its cavity, resulting in a change in the sum of the volumes of the gas in the first cavity and the second cavity of the first branch pipeline 2 of , satisfying to ensure that the first pressure sensor 6 is in a clean working environment during the filling process, It is the ultimate pressure of the filling pipeline, which can avoid the direct impact of the filling slurry in the main pipeline on the pressure sensor, improve the service life and measurement accuracy of the pressure sensor, prevent the impact of the filling slurry or cleaning fluid and other external environmental interferences, and maintain the stability of the pressure detection data.

[0043] The first regulating valve group assembly 7 includes: a first electric high-pressure ball valve 71 and a first electric gate valve 72; the first electric high-pressure ball valve 71 is arranged on the first sewage discharge pipeline 8 for rapid pressure relief, with a response time ≤ 0.5 s, and the valve core is coated with tungsten carbide to resist the impact wear of the high-solid-content medium in the filling slurry; the first sewage discharge pipeline 8 is arranged at one end of the first branch pipeline 2 far from the main pipeline 1 and is communicated with the first sewage discharge tank 4, and is used to make the filling slurry flow from the first branch pipeline 2 and the first sewage discharge pipeline 8 into the first sewage discharge tank 4 when the pressure in the main pipeline exceeds the limit, so as to achieve rapid pressure relief and avoid pipeline leakage, pipe explosion and safety accidents caused by abnormal pressure; the first electric gate valve 72 is arranged on the main pipeline 1, behind the intersection of the main pipeline 1 and the first branch pipeline 2, and the first electric gate valve 72 is linked and controlled with the motor through a reducer to ensure that the opening accuracy reaches ±1%. It supports stepped flow control to improve the stability of the pressure and the filling slurry flow regulation in the main pipeline 1 and the operation stability of the filling process; the filling pump 3, the first pressure sensor 6 and the first regulating valve group assembly 7 are electrically connected to the control device 5 to realize the real-time coordinated control of the filling pump 3 and the first regulating valve group assembly 7 by the control device 5 according to the data of the first pressure sensor 6.

[0044] In some embodiments, more than two pressure monitoring and control nodes are deployed along the main pipeline; each pressure monitoring and control node includes a branch pipeline communicated with the main pipeline, a pressure sensor arranged in the branch pipeline, a sewage discharge pipeline, a sewage discharge tank communicated with the branch pipeline through the sewage discharge pipeline, an electric high-pressure ball valve arranged in the sewage discharge pipeline, and an electric gate valve arranged downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage discharge pipeline, the first sewage discharge tank, the first electric high-pressure ball valve and the first electric gate valve form the first pressure monitoring and control node.

[0045] See Figure 2 and Figure 3, the first node includes a first branch pipe 2 provided on the main pipe 1, a first pressure sensor 6, a first sewage discharge pipe 8, a first electric high-pressure ball valve 71, a first sewage discharge tank 4, and a first electric gate valve 72 provided downstream of the first branch pipe 2; two or more pressure detection and control nodes with the same structure as the first node are deployed along the main pipe 1. When each node is in the pressure relief operation, the filling slurry at the first node flows along the first branch pipe 2, through the first electric high-pressure ball valve 71 and into the first sewage discharge pipe 8 and then flows into the first sewage discharge tank 4; when each node is in the cleaning operation, like at the first node, the first electric gate valve 72 is closed to block the cleaning fluid from flowing downstream to the next node. The cleaning fluid flows along the first branch pipe 2, flushes the first pressure sensor 6 and the pipe wall of the first branch pipe 2, and then passes through the first electric high-pressure ball valve 71 and into the first sewage discharge pipe 8 to flush the valve cavity of the first electric high-pressure ball valve 71 and the pipe wall of the first sewage discharge pipe 8, and to flush the sediment adhering to the first pressure sensor 6, the valve cavity, and the pipe.

[0046] In some embodiments, the first regulating valve group assembly 7 further includes: an elastic buckle and a limit post provided between the valve stems of the first electric high-pressure ball valve 71 and the first electric gate valve 72 and the coupling to prevent the particulate matter in the filling slurry from jamming the valves.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. The orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0048] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for regulating pressure inside a deep well pipeline, characterized in that, Including: During the process of starting the filling pump to fill the goaf with filling slurry via the main pipeline, the pressure value in the first branch pipeline is collected by the first pressure sensor in the first branch pipeline and sent to the control device; wherein, the first branch pipeline is located on the branch of the main pipeline and is communicated with the main pipeline, the first branch pipeline includes a first cavity and a second cavity, the inner diameter of the second cavity is smaller than that of the first cavity, the second cavity is located above the first cavity, and the first cavity and the second cavity are an integrated structure in communication; the first pressure sensor is arranged at the end of the second cavity and the probe of the first pressure sensor is installed facing the center of the main pipeline; When the control device determines that the pressure value in the first branch pipeline is greater than the preset pressure limit value, control the first electric high-pressure ball valve to open to discharge the filling slurry to the first sewage disposal tank for pressure relief; and, increase the opening degree of the first electric gate valve on the main pipeline to expand the flow cross-sectional area; the first sewage disposal tank is communicated with the first branch pipeline through the first sewage pipeline, the first electric high-pressure ball valve is arranged in the first sewage pipeline, and the first electric gate valve is arranged in the main pipeline and is located downstream of the first branch pipeline; Two or more pressure monitoring and control nodes are deployed along the main pipeline. When adjusting the opening degree of the first electric gate valve, it further includes: collecting the real-time flow rate of the filling slurry at the pipeline cross-section of the node where the flow sensor is located and sending it to the control device; when the control device monitors that the mutation of the real-time flow rate exceeds the safety flow rate threshold, adjust the opening degree amplitude in advance according to the preset opening degree adjustment strategy; Wherein, during the pressure relief process, dynamically adjust the displacement of the filling pump according to the pressure value decay rate, and synchronously adjust the configuration concentration of the filling slurry; when it is monitored that the pressure value is lower than the safety threshold, control to close the first electric high-pressure ball valve to terminate the pressure relief; restore the opening degree of the first electric gate valve to the initial working state, and control the displacement of the filling pump to increase step by step to the maximum and continue filling.

2. The method according to claim 1, wherein Each pressure monitoring and control node includes a branch pipeline communicated with the main pipeline, a pressure sensor arranged in the branch pipeline, a sewage pipeline, a sewage disposal tank communicated with the branch pipeline through the sewage pipeline, an electric high-pressure ball valve arranged in the sewage pipeline, and an electric gate valve arranged downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage pipeline, the first sewage disposal tank, the first electric high-pressure ball valve and the first electric gate valve form the first pressure monitoring and control node; Wherein, during the process of starting the filling pump to fill the goaf with filling slurry via the main pipeline, the method further includes: receiving the pressure values uploaded by the pressure sensors of each pressure monitoring and control node through the control device; When it is monitored that the pressure value of the first pressure monitoring and control node is greater than the preset pressure limit value, the adjacent pressure monitoring and control nodes are controlled in linkage according to the following rules: Reduce the opening degree of the electric gate valve of the upstream node adjacent to the first pressure monitoring and control node, and increase the opening degree of the electric gate valve of the downstream node adjacent to the first pressure monitoring and control node until the pressure value of the first pressure monitoring and control node returns to normal.

3. The method according to claim 1, characterized in that, It further includes: Detect the ambient temperature using a temperature sensor; Determine the pressure influence value based on the ambient temperature, and determine the actual pressure value based on the pressure influence value and the pressure value collected by the first pressure sensor.

4. The method according to claim 1, wherein It further includes: When the cleaning control signal is triggered, control to close the first electric gate valve located on the main pipeline, and at the same time open the first electric high-pressure ball valve. Flush the cleaning fluid into the first branch pipeline through the filling pump to scour the probe of the first pressure sensor, the wall of the first branch pipeline and the wall of the first sewage discharge pipeline, so as to discharge the flushing dirt to the first sewage discharge pool.

5. A filling system for deep well pipelines using the pressure regulating method according to any one of claims 1-4, characterized in that, It includes: Main pipeline, first branch pipeline, filling pump, sewage discharge pool, control device, first pressure sensor and first regulating valve group assembly; The filling pump is connected to the main pipeline, and the first branch pipeline is located on the branch of the main pipeline and communicates with the main pipeline; the axis of the first branch pipeline is vertically and intersectingly arranged with the axis of the main pipeline; The first branch pipeline includes a first cavity and a second cavity. The inner diameter of the second cavity is smaller than that of the first cavity. The second cavity is located above the first cavity. The first cavity and the second cavity are an integrated structure in communication; the first pressure sensor is arranged at the end of the first branch pipeline far from the main pipeline and at the end of the second cavity, and the probe of the first pressure sensor is installed facing the center of the main pipeline; The first regulating valve group assembly includes: a first electric high-pressure ball valve and a first electric gate valve; the first electric high-pressure ball valve is arranged on the first sewage discharge pipeline, and the first sewage discharge pipeline is arranged at the end of the first branch pipeline far from the main pipeline and communicates with the sewage discharge pool; the first electric gate valve is arranged on the main pipeline, behind the intersection of the main pipeline and the first branch pipeline; The filling pump, the first pressure sensor and the first regulating valve group assembly are electrically connected to the control device.

6. The filling system according to claim 5, characterized in that, Two or more pressure monitoring and control nodes are deployed along the main pipeline; each pressure monitoring and control node includes a branch pipeline communicating with the main pipeline, a pressure sensor arranged in the branch pipeline, a sewage discharge pipeline, a sewage discharge pool communicated with the branch pipeline through the sewage discharge pipeline, an electric high-pressure ball valve arranged in the sewage discharge pipeline, and an electric gate valve arranged downstream of the branch pipeline; the first branch pipeline, the first pressure sensor, the first sewage discharge pipeline, the first sewage discharge pool, the first electric high-pressure ball valve and the first electric gate valve form the first pressure monitoring and control node.

Images