Intelligent Flexible Soft Tank Based on Hydraulic Actuator Structure

Abstract

The present invention belongs to the technical field of the application of flexible tanks, aiming to solve the problem of how to make full use of the remaining water in the flexible tank. Specifically, it relates to an intelligent flexible soft tank based on a hydraulic actuator structure, which includes a total controller and a plurality of foldable brackets connected in series to form a closed-loop structure; a water supply manifold outlet is arranged at the bottom of the closed-loop structure; a liquid level height detection device is arranged at the water supply manifold outlet; the foldable bracket includes a bottom support, an adjustment bracket and a hydraulic actuator, and the adjustment bracket is hinged to the bottom support; the hydraulic actuator is arranged between the bottom support and the adjustment bracket, and the hydraulic actuator is hinged to the bottom support and the adjustment bracket; an angle detection device is arranged on the adjustment bracket; during the working process, the plurality of hydraulic actuators in the plurality of foldable brackets extend under the control of the total controller to make the overall tank opening fold inward or contract to make the overall tank opening recover outward; the operation of the present invention is simple, intelligent and accurate, and can accurately obtain the remaining fracturing water consumption in the tank.

Description

Technical Field

[0001] The present invention belongs to the technical field of the application of flexible tanks, and particularly relates to an intelligent flexible soft tank based on a hydraulic actuator structure. Background Art

[0002] With the exploration and development of unconventional oil and gas reservoirs such as shale oil, large-scale volume fracturing technology has been widely applied. At the construction site of large-scale volume fracturing, flexible tanks are usually built to store fracturing water, and the storage of fracturing water has become the primary consideration in fracturing construction. At present, large flexible tanks are formed by splicing a large number of foldable brackets. Coupled with factors such as uneven ground topography during construction, it causes the remaining volume of water in the flexible tank after fracturing to not be fully and effectively utilized. Only when a large-flow water pipeline continues to supply sufficient fracturing water can the next construction be carried out, resulting in only two fracturing sections per day of construction, which affects the construction progress of the entire shale oil fracturing platform. The solutions are either to build larger-scale flexible tanks or to use cylindrical water storage tanks, resulting in a significant increase in cost. The flexible tanks disclosed in the prior art only solve the problem of the retraction and deployment of the flexible tank, but none of them solve the problem of how to fully and effectively utilize the remaining volume of water in the flexible tank. Summary of the Invention

[0003] In order to solve the above problems in the prior art, that is, to solve the problem of how to make full use of the remaining water in the flexible tank, the present invention provides an intelligent flexible soft tank based on a hydraulic actuator structure, including a total controller and a plurality of foldable brackets, and a plurality of the foldable brackets are all in signal connection with the total controller;

[0004] A plurality of the foldable brackets are connected in series to form a closed-loop structure; a water supply manifold outlet is arranged at the bottom of the closed-loop structure; a liquid level height detection device is arranged on the side wall of the closed-loop structure, and the liquid level height detection device is in signal connection with the total controller; there are a plurality of the liquid level height detection devices, and the plurality of the liquid level height detection devices are arranged at equal intervals along the height direction of the liquid level;

[0005] The foldable bracket includes a bottom support, an adjustment bracket and a hydraulic actuator, and the adjustment bracket is hinged to the bottom support; the hydraulic actuator is arranged between the bottom support and the adjustment bracket, and the hydraulic actuator is hinged to the bottom support and the adjustment bracket; an angle detection device is arranged on the adjustment bracket, and the angle detection device is in signal connection with the total controller;

[0006] During the working process, a plurality of the hydraulic actuators in the plurality of the foldable brackets extend under the control of the total controller to cause the overall inward convergence of the tank opening, or a plurality of the hydraulic actuators in the plurality of the foldable brackets contract under the control of the total controller to cause the overall outward restoration of the tank opening.

[0007] In some preferred embodiments, the intelligent flexible soft tank further includes an industrial switch and a plurality of node controllers. The industrial switch is signal-connected to the master controller, and the plurality of node controllers are all communicatively connected to the industrial switch;

[0008] The industrial switch transmits the target instruction sent by the master controller based on the received instruction to the plurality of node controllers. Through the control algorithm and control program stored on each node controller for controlling the movement of the corresponding hydraulic actuator, the target instruction for making the corresponding hydraulic actuator move is generated through processing and operation. The master controller determines whether the corresponding bracket reaches the preset position based on the bracket angle information detected by the plurality of angle detection devices provided in the plurality of foldable brackets, so as to issue an instruction on whether to adjust the corresponding hydraulic actuator. When the angle information detected by the plurality of angle detection devices is consistent with the preset angle information, the master controller determines whether the preset liquid level value is reached according to the real-time liquid level value detected by the liquid level height detection device. If the real-time liquid level value is lower than the preset liquid level value, an instruction for not allowing the next stage of fracturing construction is output and an alarm is given; if the real-time liquid level value is not lower than the preset liquid level value, an instruction for allowing the next stage of fracturing construction is output.

[0009] In some preferred embodiments, the bottom support includes a bottom bracket, a first support bracket, and a second support bracket. The first support bracket and the second support bracket are respectively fixed on both sides of the bottom bracket. The first support bracket and one side of the bottom bracket form a first triangular structure, and the second support bracket and the other side of the bottom bracket form a second triangular structure;

[0010] The adjustment bracket includes a first connection bracket and a second connection bracket. The first connection bracket includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod form a first L-shaped structure;

[0011] The second connection bracket includes a third connecting rod and a fourth connecting rod, and the third connecting rod and the fourth connecting rod form a second L-shaped structure;

[0012] The free end of the first connecting rod is hinged to the first support bracket, and the free end of the third connecting rod is hinged to the second support bracket; the free end of the fourth connecting rod is fixedly connected to the free end of the second connecting rod. The fourth connecting rod and the second connecting rod are of equal length, and the fourth connecting rod and the second connecting rod form a first straight rod;

[0013] One end of the hydraulic actuator is hinged to the midpoint of the first straight rod, and the other end is hinged to the bottom bracket.

[0014] In some preferred embodiments, two adjacent collapsible brackets share the third connecting rod and the second support bracket, or two adjacent collapsible brackets share the third connecting rod and the first support bracket.

[0015] In some preferred embodiments, a plurality of the collapsible brackets form a rectangular quadrilateral structure.

[0016] In some preferred embodiments, the hydraulic actuator includes a stepper motor, a gear pump, a relief valve, a first electromagnetic directional control valve, a second electromagnetic directional control valve, a pilot-operated check valve, a check valve, a temperature sensor, a hydraulic cylinder, a displacement sensor, a pressure sensor, a pressure tapping, an oil tank, and a throttle valve. The temperature sensor, the displacement sensor, and the stepper motor are all connected to the node controller by signals. The temperature sensor is used to detect the temperature information in the oil tank, and the displacement sensor is used to detect the displacement information of the piston rod arranged in the hydraulic cylinder. The relief valve and the check valve are sequentially arranged between one side of the gear pump and the oil tank. The pilot-operated check valve and the pressure sensor are sequentially arranged on the other side of the gear pump.

[0017] When the hydraulic actuators corresponding to a plurality of the collapsible brackets extend under the control of the master controller to cause the overall inward convergence of the tank mouth, a plurality of the node controllers simultaneously send solenoid valve control signals through control operations. The first electromagnetic directional control valve and the second electromagnetic directional control valve are both in the power-off state. The first electromagnetic directional control valve is in the closed state, and the second electromagnetic directional control valve is in the connected state. Each of the node controllers simultaneously sends motor driver control signals through control operations, and drives the gear pump to rotate through the stepper motor to suck in low-pressure hydraulic oil. The output high-pressure oil flows through the relief valve and the check valve and enters the oil tank. The relief valve provides back pressure with a preset pressure value for the system. Under the action of the back pressure, the pilot-operated check valve opens to form a reverse path. The hydraulic oil in the rod chamber of the hydraulic cylinder passes through the pilot-operated check valve and enters the suction port of the gear pump to provide pressure for the oil tank, and pushes the piston rod in the hydraulic cylinder to move upward.

[0018] In some preferred embodiments, the industrial switch and the master controller adopt an Ethernet communication method, and a plurality of the node controllers and the industrial switch both adopt a fieldbus communication method.

[0019] In some preferred embodiments, the intelligent flexible soft tank further includes a touch operation screen, and the touch operation screen is connected to the master controller by signals to display the information received by the master controller and the output instructions in real time.

[0020] In some preferred embodiments, the angle detection device is an angle sensor.

[0021] In some preferred embodiments, the liquid level detection device is a liquid level sensor.

[0022] The beneficial effects of the present invention are as follows:

[0023] Through an intelligent flexible soft tank based on the structure of a hydraulic actuator provided by the present invention, when the piston rods inside the hydraulic actuators in many foldable brackets of the same style synchronously move to their respective appropriate positions, the overall tank mouth of the spliced flexible soft tank folds inward, so that the remaining fracturing water in the flexible soft tank gathers at the outlet of the water supply pipeline network. The liquid level at the outlet of the water supply pipeline network rises. After observation, it can be seen that the remaining fracturing water in the flexible soft tank can continue to fracture the next section. Finally, the remaining fracturing water in the flexible soft tank can be fully and effectively utilized, meeting the construction requirements of fracturing multiple sections in one day, and successfully achieving the construction effect of accelerating the speed and increasing the efficiency of the shale oil fracturing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives and advantages of the present application will become more obvious:

[0025] Figure 1 is a top view schematic diagram of an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of one side tank body of the present invention;

[0027] Figure 3 is a structural schematic diagram of a single foldable bracket of the present invention;

[0028] Figure 4 is a schematic diagram of the control system principle of the present invention;

[0029] Figure 5 is a schematic diagram of the working principle of the hydraulic system of a single hydraulic actuator of the present invention.

[0030] DESCRIPTION OF THE REFERENCE NUMERALS:

[0031] 1. Stepper motor; 2. Gear pump; 3.1. Relief valve; 4.1. First electromagnetic directional control valve, 4.2. Second electromagnetic directional control valve; 5. Pilot-operated check valve; 6.4. Check valve; 7. Temperature sensor; 8. Hydraulic cylinder; 9. Displacement sensor; 10. Pressure sensor; 11. Pressure measuring joint; 12. Oil tank; 13. Throttle valve; 14. Foldable bracket, 141. Bottom support, 1411. Base bracket, 1412. First support bracket, 1413. Second support bracket, 142. Adjustment bracket, 1421. First connecting bracket, 1422. Second connecting bracket; 15. First hinge; 16. Second hinge; 17. Hydraulic actuator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0033] The present invention provides an intelligent flexible soft tank based on a hydraulic actuator structure, which includes a total controller and a plurality of foldable brackets. The plurality of foldable brackets are all connected to the total controller in a signal connection; the plurality of foldable brackets are connected in series to form a closed-loop structure. An anti-seepage layer is laid in the internal space of the closed-loop structure, including the bottom and side wall areas of the flexible soft tank; a water supply manifold outlet is arranged at the bottom of the closed-loop structure; a liquid level detection device is arranged on the side wall of the closed-loop structure, and the liquid level detection device is connected to the total controller in a signal connection; there are a plurality of liquid level detection devices, and the plurality of liquid level detection devices are arranged at equal intervals along the height direction of the liquid level; the foldable bracket includes a bottom support, an adjustment bracket and a hydraulic actuator. The adjustment bracket is hinged to the bottom support; the hydraulic actuator is arranged between the bottom support and the adjustment bracket, and the hydraulic actuator is hinged to the bottom support and the adjustment bracket; an angle detection device is arranged on the adjustment bracket, and the angle detection device is connected to the total controller in a signal connection; during the working process, the plurality of hydraulic actuators in the plurality of foldable brackets extend under the control of the total controller to make the overall tank mouth retract inward, or the plurality of hydraulic actuators in the plurality of foldable brackets contract under the control of the total controller to make the overall tank mouth recover outward. The intelligent flexible soft tank based on the hydraulic actuator structure disclosed by the present invention is simple to operate, intelligent and accurate, can make full and effective use of the remaining fracturing water in the flexible soft tank, meet the construction requirements of fracturing multiple sections in one day, and smoothly achieve the construction effect of improving the speed and efficiency of the shale oil fracturing platform.

[0034] The present invention will be further described below with reference to the accompanying drawings in conjunction with the embodiments.

[0035] Refer to the attached Figure 1 to the attached Figure 5 , the present invention provides an intelligent flexible soft tank based on a hydraulic actuator structure, which includes a total controller and a plurality of foldable brackets 14. The plurality of foldable brackets are all connected to the total controller in a signal connection; the plurality of foldable brackets are connected in series to form a closed-loop structure; a water supply manifold outlet is arranged at the bottom of the closed-loop structure; a liquid level detection device is arranged on the side wall of the closed-loop structure, and the liquid level detection device is connected to the total controller in a signal connection; there are a plurality of liquid level detection devices, and the plurality of liquid level detection devices are arranged at equal intervals along the height direction of the liquid level. Through the plurality of liquid level detection devices arranged at different heights, the liquid level height information can be accurately obtained.

[0036] The collapsible support includes a bottom support 141, an adjustment support 142, and a hydraulic actuator 17. The adjustment support is hinged to the bottom support; the hydraulic actuator is disposed between the bottom support and the adjustment support, and the hydraulic actuator is hinged to the bottom support and the adjustment support; an angle detection device is provided on the adjustment support, and the angle detection device is in signal connection with the master controller;

[0037] During the working process, the multiple hydraulic actuators in the multiple collapsible supports extend under the control of the master controller to cause the overall inward convergence of the tank mouth. Through the real-time detection of the liquid level height detection device, the remaining water volume in the flexible tank can be known, and it can be efficiently and accurately obtained whether the remaining fracturing water can continue to fracture the next section. If the obtained real-time liquid level value is lower than the preset liquid level value, it is obtained that the water for the next section of fracturing cannot be satisfied, and only waiting for the large-flow water pipeline to supply water is possible; or, the multiple hydraulic actuators in the multiple collapsible supports contract under the control of the master controller to cause the overall outward restoration of the tank mouth.

[0038] Through the intelligent flexible soft tank based on the hydraulic actuator structure provided by the present invention, the remaining fracturing water volume in the tank can be quickly known during the construction process, and then it can be quickly known whether it meets the construction requirements of fracturing multiple sections in one day, so that the remaining fracturing water in the tank can be fully and effectively utilized, and the construction effect of improving the speed and efficiency of the shale oil fracturing platform can be smoothly achieved.

[0039] In this embodiment, an anti-seepage layer is laid in the internal space of the flexible soft tank, including the bottom and side wall areas of the flexible soft tank. One or more anti-seepage layers are laid and fixedly connected to each foldable support of the flexible soft tank. The anti-seepage layer can generally adopt known waterproof materials, such as polyethylene, PPC, etc., and other composite materials, which usually have a certain structural strength and also have characteristics such as anti-seepage and anti-pollution.

[0040] Preferably, the angle detection device is an angle sensor.

[0041] Preferably, the liquid level height detection device is a liquid level sensor.

[0042] The intelligent flexible soft tank further includes an industrial switch and multiple node controllers. The industrial switch is signal-connected to the master controller, and multiple node controllers are all communicatively connected to the industrial switch. Based on the target instruction sent by the master controller received, the industrial switch transmits it to multiple node controllers, and through the control algorithm and control program for controlling the movement of the corresponding hydraulic actuator stored on each node controller, a target instruction for making the corresponding hydraulic actuator move is generated through processing and calculation. The master controller determines whether the corresponding bracket reaches the preset position based on the bracket angle information detected by multiple angle detection devices arranged in multiple foldable brackets, so as to issue an instruction on whether to adjust the corresponding hydraulic actuator. When the angle information detected by multiple angle detection devices is consistent with the preset angle information, the master controller judges whether the preset liquid level value is reached according to the real-time liquid level value detected by the liquid level height detection device. If the real-time liquid level value is lower than the preset liquid level value, an instruction that the next fracturing construction cannot be carried out is output and an alarm is given, waiting for water supply from the large-flow water delivery pipeline. If the real-time liquid level value is not lower than the preset liquid level value, an instruction that the next fracturing construction can be carried out is output.

[0043] Preferably, the industrial switch and the master controller adopt an Ethernet communication method, and multiple node controllers and the industrial switch all adopt a fieldbus communication method.

[0044] The intelligent flexible soft tank further includes a touch operation screen, and the touch operation screen is signal-connected to the master controller to display the information received by the master controller and the output instructions in real time.

[0045] Furthermore, the bottom support includes a bottom bracket 1411, a first support bracket 1412, and a second support bracket 1413. The first support bracket and the second support bracket are respectively fixed on both sides of the bottom bracket. The first support bracket and one side of the bottom bracket form a first triangular structure, and the second support bracket and the other side of the bottom bracket form a second triangular structure.

[0046] The adjustment bracket includes a first connecting bracket 1421 and a second connecting bracket 1422. The first connecting bracket includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod form a first L-shaped structure. The second connecting bracket includes a third connecting rod and a fourth connecting rod, and the third connecting rod and the fourth connecting rod form a second L-shaped structure.

[0047] The free end of the first connecting rod is hinged to the first support bracket through a first hinge 15, and the free end of the third connecting rod is hinged to the second support bracket through a second hinge 16. The free end of the fourth connecting rod is fixedly connected to the free end of the second connecting rod. The fourth connecting rod and the second connecting rod are of equal length, and the fourth connecting rod and the second connecting rod form a first straight rod.

[0048] Preferably, one end of the hydraulic actuator is hinged to the midpoint of the first straight rod, and the other end is hinged to the bottom bracket.

[0049] Furthermore, two adjacent collapsible brackets share the third connecting rod and the second support bracket, or two adjacent collapsible brackets share the third connecting rod and the first support bracket.

[0050] Preferably, multiple collapsible brackets form a rectangular quadrilateral structure.

[0051] Furthermore, the rotatable angle of the adjustment bracket can be flexibly set according to actual needs. By adjusting the installation positions of the first hinge and the second hinge, the rotation angle adjustment of the bracket can be achieved. Preferably, the first hinge and the second hinge are arranged at the middle position or the lower position near the bottom of the rod.

[0052] The hydraulic actuator includes a stepper motor 1, a gear pump 2, a relief valve 3.1, a first solenoid directional control valve 4.1, a second solenoid directional control valve 4.2, a pilot-operated check valve 5, a check valve 6.4, a temperature sensor 7, a hydraulic cylinder 8, a displacement sensor 9, a pressure sensor 10, a pressure gauge adapter 11, an oil tank 12, and a throttle valve 13. The temperature sensor, the displacement sensor, and the stepper motor are all connected to the node controller by signals; the temperature sensor is used to detect the temperature information in the oil tank, and the displacement sensor is used to detect the displacement information of the piston rod arranged in the hydraulic cylinder; the relief valve and the check valve are sequentially arranged between one side of the gear pump and the oil tank; the pilot-operated check valve and the pressure sensor are sequentially arranged on the other side of the gear pump;

[0053] When the corresponding hydraulic actuators in multiple collapsible brackets extend under the control of the master controller to make the overall tank mouth retract inward, that is, when the shale oil fracturing platform fractures two sections of construction every day, observe the remaining water in the intelligent flexible soft tank. The retraction target command is given by the touch operation screen on the master controller. Through the control operation of the master controller, the retraction target command signal is transmitted to the industrial switch through Ethernet communication, and the industrial switch transmits the retraction target command signal to each node controller through fieldbus communication. Multiple node controllers simultaneously send solenoid valve control signals through control operations. The two-position two-way first solenoid directional control valve 4.1 and the second solenoid directional control valve 4.2 are both in the de-energized working condition. The first solenoid directional control valve is in the closed state, and the second solenoid directional control valve is in the connected state; at the same time, each node controller simultaneously sends a motor driver control signal through control operations to drive the stepper motor to rotate. At this time, the stepper motor is energized to achieve reverse rotation, driving the gear pump in the drive system to rotate, sucking in low-pressure hydraulic oil, and the output high-pressure oil flows through the relief valve and the check valve into the oil tank. In this embodiment, the opening pressure of 5 MPa is set for the relief valve. Under the action of the high-pressure oil, the relief valve is forced to open. After opening, the hydraulic oil flows through the check valve and then enters the oil tank.

[0054] At this time, the overflow valve plays the role of providing system backpressure. The overflow valve can provide a backpressure of 5 MPa for the system. Under the action of the backpressure, the pilot-operated check valve opens, and a reverse passage can be formed. At this time, the hydraulic oil in the rod chamber of the hydraulic cylinder passes through the pilot-operated check valve and enters the suction port of the gear pump; part of the oil at the suction port of the hydraulic pump comes from the rod chamber of the hydraulic cylinder, and part comes from the fuel tank. Since the rod of the hydraulic cylinder moves upward, the pressure in the rodless chamber of the hydraulic cylinder is lower than the pressure of the fuel tank, so the hydraulic oil passes through the two-position two-way solenoid directional valve and enters the rodless chamber, and the action is completed.

[0055] Among them, the master controller is connected to the 220V AC wellsite power grid that provides power, a touch operation screen for operating target instructions, and sensors that feedback the liquid level information of the flexible soft tank and the rotation angle information of the foldable support hinge; the control algorithms and control programs for controlling the target instructions of the intelligent soft tank are stored in the master controller.

[0056] Each node controller is connected to the 220V AC wellsite power grid that provides power, a motor driver and a solenoid valve for executing target instructions, and sensors that feedback the temperature, pressure information and linear displacement information of the hydraulic actuator. The control algorithms and control programs for controlling the movement of the hydraulic actuator are stored in each node controller.

[0057] When the internal piston rods of the hydraulic actuators in many foldable supports of the same style synchronously extend to their respective appropriate positions according to the retraction target instruction signals on each node controller, and the feedback signals are sent to each node controller in real time through temperature sensors, pressure sensors and displacement sensors, and the feedback data is read on the touch operation screen of the master controller, so that many foldable supports of the same style rotate by a certain angle around the rotating pairs of their respective first hinges 15 and second hinges 16, and the feedback signals are sent to the master controller in real time through the angle sensors, so that the overall tank mouth of the spliced intelligent flexible soft tank retracts inward, so that the remaining fracturing water in the intelligent flexible soft tank gathers at the outlet of the water supply pipeline network. Since the liquid level at the outlet of the water supply pipeline network rises, the feedback signal is sent to the master controller in real time through the liquid level sensor arranged at the outlet of the water supply pipeline network. After reading the data on the touch operation screen of the master controller, it is easy to judge that the remaining fracturing water in the intelligent flexible soft tank can continue to fracture the next section. Finally, the remaining fracturing water in the intelligent flexible soft tank can be fully and effectively utilized, meeting the construction requirements of fracturing multiple sections in one day, and successfully achieving the construction effect of improving the speed and efficiency of the shale oil fracturing platform.

[0058] If the judgment result is obtained after reading the data on the touch operation screen of the master controller, even if the overall tank mouth of the intelligent flexible soft tank retracts inward, the remaining fracturing water in the intelligent flexible soft tank cannot continue to fracture the next section and can only wait for water supply from the large-flow water pipeline.

[0059] The recovery target instruction is given by the touch operation screen on the master controller. Through the control operation of the master controller, the recovery target instruction signal is transmitted to the industrial switch through Ethernet communication, and the industrial switch transmits the recovery target instruction signal to each node controller through fieldbus communication. When the internal piston rods of the hydraulic actuators in many collapsible brackets of the same style need to retract, each node controller simultaneously issues a solenoid valve control signal through control operation. The first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are both in the de-energized state. The first electromagnetic directional valve is in the closed state, and the second electromagnetic directional valve is in the connected state. At the same time, each node controller simultaneously issues a motor driver control signal to drive the stepping motor to rotate. At this time, the stepping motor is energized to achieve forward rotation, and the gear pump in the drive system rotates. The gear pump starts to work and suck oil. The hydraulic oil in the hydraulic oil tank enters the gear pump through the one-way valve, and under the action of the gear pump, it becomes high-pressure oil and enters the rod chamber of the hydraulic cylinder through the pilot-operated one-way valve. Under the action of the high-pressure oil, the hydraulic cylinder rod moves downward and retracts, and the hydraulic oil in the rodless chamber enters the system oil tank through the two-position two-way electromagnetic directional valve, and the action is completed.

[0060] When the internal piston rods of the hydraulic actuators in many collapsible brackets of the same style retract to their respective appropriate positions synchronously according to the recovery target instruction signals on each node controller, and the feedback signals of the temperature, pressure, and displacement sensors are fed back to each node controller in real time and displayed on the touch operation screen of the master controller to read the feedback data, so that many collapsible brackets of the same style rotate by a certain angle around the rotating pairs of their respective first hinges 15 and second hinges 16, and the feedback signals of the angle sensors are fed back to the master controller in real time, so that the overall tank mouth of the spliced intelligent flexible soft tank expands outward and returns to its original state. Since the liquid level at the outlet of the water supply pipeline network decreases, the feedback signal is fed back to the master controller in real time through the liquid level sensor arranged at the outlet of the water supply pipeline network. After reading the data from the touch operation screen of the master controller, it is easy to judge that the intelligent flexible soft tank is in a safe static state and waiting for water supply on the large-flow water supply pipeline.

[0061] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

[0062] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0063] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in these processes, articles, or devices / equipment.

[0065] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. An intelligent flexible soft tank based on a hydraulic actuator structure, characterized in that, It includes a general controller and a plurality of collapsible brackets, and the plurality of collapsible brackets are all signal-connected to the general controller; The plurality of collapsible brackets are connected in series to form a closed-loop structure; a water supply manifold outlet is provided at the bottom of the closed-loop structure; a liquid level detection device is provided on the side wall of the closed-loop structure, and the liquid level detection device is signal-connected to the general controller; there are a plurality of the liquid level detection devices, and the plurality of liquid level detection devices are arranged at equal intervals along the height direction of the liquid level; The collapsible bracket includes a bottom support, an adjustment bracket and a hydraulic actuator, and the adjustment bracket is hinged to the bottom support; the hydraulic actuator is arranged between the bottom support and the adjustment bracket, and the hydraulic actuator is hinged to the bottom support and the adjustment bracket; an angle detection device is provided on the adjustment bracket, and the angle detection device is signal-connected to the general controller; During the working process, the plurality of hydraulic actuators in the plurality of collapsible brackets extend under the control of the general controller to cause the overall inward convergence of the tank mouth, or, the plurality of hydraulic actuators in the plurality of collapsible brackets contract under the control of the general controller to cause the overall outward restoration of the tank mouth; The bottom support includes a bottom bracket, a first support bracket and a second support bracket, the first support bracket and the second support bracket are respectively fixed on both sides of the bottom bracket, the first support bracket and one side of the bottom bracket form a first triangular structure, and the second support bracket and the other side of the bottom bracket form a second triangular structure; The adjustment bracket includes a first connecting bracket and a second connecting bracket, the first connecting bracket includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod form a first L-shaped structure; The second connecting bracket includes a third connecting rod and a fourth connecting rod, and the third connecting rod and the fourth connecting rod form a second L-shaped structure; The free end of the first connecting rod is hinged to the first support bracket, and the free end of the third connecting rod is hinged to the second support bracket; the free end of the fourth connecting rod is fixedly connected to the free end of the second connecting rod, the fourth connecting rod and the second connecting rod are of equal length, and moreover, the fourth connecting rod and the second connecting rod form a first straight rod; One end of the hydraulic actuator is hinged to the midpoint of the first straight rod, and the other end is hinged to the bottom bracket.

2. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 1, wherein This intelligent flexible soft tank further includes an industrial switch and a plurality of node controllers, the industrial switch is signal-connected to the general controller, and the plurality of node controllers are all communicatively connected to the industrial switch; The industrial switch transmits, based on the target instruction sent by the master controller received, to multiple node controllers, and processes and calculates through the control algorithms and control programs stored on each node controller for controlling the movement of the corresponding hydraulic actuator to generate a target instruction for making the corresponding hydraulic actuator move; the master controller determines whether the corresponding support reaches the preset position based on the support angle information detected by multiple angle detection devices arranged in multiple foldable supports, so as to issue an instruction on whether to adjust the corresponding hydraulic actuator; when the angle information detected by multiple angle detection devices is consistent with the preset angle information, the master controller determines whether the preset liquid level value is reached according to the real-time liquid level value detected by the liquid level height detection device received. If the real-time liquid level value is lower than the preset liquid level value, it outputs an instruction that the next stage of fracturing construction cannot be carried out and gives an alarm; if the real-time liquid level value is not lower than the preset liquid level value, it outputs an instruction that the next stage of fracturing construction can be carried out.

3. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 2, wherein Two adjacent foldable supports share the third connecting rod and the second support bracket, or two adjacent foldable supports share the third connecting rod and the first support bracket.

4. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 3, characterized in that Multiple foldable supports form a rectangular quadrilateral structure.

5. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 3, wherein The hydraulic actuator includes a stepping motor, a gear pump, an overflow valve, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a hydraulic control check valve, a one-way valve, a temperature sensor, a hydraulic cylinder, a displacement sensor, a pressure sensor, a pressure measuring joint, an oil tank and a throttle valve. The temperature sensor, the displacement sensor and the stepping motor are all connected to the node controller by signals; the temperature sensor is used for detecting the temperature information in the oil tank, and the displacement sensor is used for detecting the displacement information of the piston rod arranged in the hydraulic cylinder; the overflow valve and the one-way valve are sequentially arranged between one side of the gear pump and the oil tank; the hydraulic control check valve and the pressure sensor are sequentially arranged on the other side of the gear pump; When the corresponding hydraulic actuator in multiple foldable supports extends under the control of the master controller to make the overall tank mouth fold inwards, multiple node controllers simultaneously issue solenoid valve control signals through control calculation. The first electromagnetic reversing valve and the second electromagnetic reversing valve are both in the power-off state. The first electromagnetic reversing valve is in the closed state, and the second electromagnetic reversing valve is in the connected state; each node controller simultaneously issues a motor driver control signal through control calculation, and drives the gear pump to rotate through the stepping motor to suck in low-pressure hydraulic oil, and the output high-pressure oil flows through the overflow valve and the one-way valve into the oil tank; the overflow valve provides back pressure with a preset pressure value for the system, and under the action of the back pressure, the hydraulic control check valve opens to form a reverse path, and the hydraulic oil in the rod chamber of the hydraulic cylinder enters the suction port of the gear pump through the hydraulic control check valve to provide pressure for the oil tank, and pushes the piston rod in the hydraulic cylinder to move upwards.

6. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 2, characterized in that, The industrial switch and the master controller adopt an Ethernet communication method, and multiple node controllers and the industrial switch both adopt a fieldbus communication method.

7. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 1, wherein The intelligent flexible software tank further includes a touch operation screen, which is signal-connected to the master controller to display in real time the information received by the master controller and the output instructions.

8. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 1, characterized in that, The angle detection device is an angle sensor.

9. The intelligent flexible soft tank based on the hydraulic actuator structure according to claim 1, characterized in that The liquid level height detection device is a liquid level sensor.

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