Sand mixing equipment

Abstract

The utility model provides sand mixing equipment which comprises a suction manifold, a sand mixing device and a sand mixing device, a liquid outlet is formed in the discharge manifold; the power assemblies are respectively communicated between the liquid inlet and the sand mixing tank and between the liquid outlet and the sand mixing tank, and each power assembly comprises a driving part, a driving part and a driving part; the speed regulation assembly comprises a magnetic force component and a magnetic conduction component, at least part of the magnetic force component is opposite to the magnetic conduction component, the rotating speed of the magnetic conduction component is adjustable, and the driving component is connected with the magnetic force component; and the magnetic conductive component is connected with the pump body. The problem that in the prior art, a frequency converter is adopted for speed regulation in sand mixing equipment, harmonic interference is likely to occur, and consequently the fault rate is high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transportation, and more specifically, to a sand mixing device. Background Art

[0002] In a fracturing operation, a centrifugal pump device for liquid transportation, a mixing and liquid supply device for mixing fracturing base fluid, and a sand mixing device for mixing and transporting a sand-carrying fluid (fracturing fluid) are usually required on site. In a cementing operation, it is necessary to transport cement slurry and other liquids for other operations. For example, in equipment that requires liquid supply and transportation such as sand mixing and mixing, it is usually necessary to adjust the rotational speed of the centrifugal pump to adapt to the actual required liquid transportation speed.

[0003] In a hydraulic system, the flow rate of a hydraulic motor is adjusted by a variable displacement piston pump or a hydraulic valve with adjustable opening degree, and then the rotational speed of the hydraulic motor driving the centrifugal pump is adjusted. However, the hydraulic system has low efficiency, requires cooling of the hydraulic oil, and requires regular oil change, maintenance inspection, etc., resulting in high usage costs.

[0004] In existing electric-driven sand mixing devices, a frequency converter is combined with a motor and a pump, or a frequency conversion integrated machine is combined with a pump to transport liquids. After long-term use, the failure rate is relatively high, the maintenance cost is high, and there are disadvantages such as harmonic interference. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a sand mixing device to solve the problem that harmonic interference easily occurs in the sand mixing device in the prior art when using a frequency converter for speed regulation, resulting in a relatively high failure rate.

[0006] To achieve the above object, according to one aspect of the utility model, there is provided a sand mixing device, including: a suction manifold provided with a liquid inlet; a discharge manifold provided with a liquid outlet; a power assembly, with a power assembly connected between the liquid inlet and the sand mixing tank and between the liquid outlet and the sand mixing tank respectively. The power assembly includes: a driving component; a speed regulation assembly including a magnetic component and a magnetic conduction component, at least a part of the magnetic component is opposite to the magnetic conduction component, the rotational speed of the magnetic conduction component is set to be adjustable, and the driving component is connected to the magnetic component; a pump body, with the magnetic conduction component connected to the pump body.

[0007] Further, the magnetic component is a permanent magnetic component; and / or, the power assembly further includes: an electromagnetic component provided on the magnetic component and / or the magnetic conduction component, and the magnitude of the current of the electromagnetic component is set to be adjustable.

[0008] Further, the magnetic component includes: a first permanent magnet body; a second permanent magnet body disposed on the first permanent magnet body, the second permanent magnet body being disposed along the circumferential direction of the first permanent magnet body and extending along the axial direction of the first permanent magnet body to enclose a coupling space; at least a part of the magnetic conduction component is disposed in the coupling space.

[0009] Further, the magnetic conduction component includes: a first magnetic conduction body opposite to the first permanent magnet body, at least a part of the first magnetic conduction body being disposed in the coupling space; a second magnetic conduction body disposed on the first magnetic conduction body and along the circumferential direction of the first magnetic conduction body, the second magnetic conduction body extending from the first magnetic conduction body in a direction away from the first permanent magnet body, and at least a part of the second magnetic conduction body being opposite to the second permanent magnet body.

[0010] Further, an electromagnetic component is disposed on the magnetic component. The magnetic component includes a disk body; the electromagnetic component is embedded in the disk body, and there are a plurality of electromagnetic components, and the plurality of electromagnetic components are spaced apart along the circumferential direction of the disk body.

[0011] Further, the magnetic component further includes: permanent magnets embedded in the disk body, there are a plurality of permanent magnets, and the plurality of permanent magnets are spaced apart along the circumferential direction of the disk body; wherein, the diameter of the circumferential surface where each permanent magnet is located is greater than or less than the diameter of the circumferential surface where each electromagnetic component is located; or, the plurality of permanent magnets and the plurality of electromagnetic components are alternately spaced apart in sequence.

[0012] Further, the electromagnetic component is in a strip structure, and the length direction of the electromagnetic component is consistent with the axial direction of the disk body; or, the length direction of the electromagnetic component is consistent with the radial direction of the disk body.

[0013] Further, the sand mixing equipment further includes: a transmission assembly, at least a part of the transmission assembly is movably disposed, the transmission assembly is connected to the magnetic component and / or the magnetic conduction component, and the magnetic component and / or the magnetic conduction component are driven to move in a direction of approaching or separating from each other through the transmission assembly.

[0014] Further, the transmission assembly includes: a transmission gear disposed on the driving component, the transmission gear being rotatably disposed about its own axis; a transmission rack disposed below the driving component, the transmission gear meshing with the transmission rack, so that during the rotation of the transmission gear, the driving component is driven to move horizontally, so that the driving component drives the magnetic component to move; or, the transmission assembly includes: a moving rod, the moving rod being telescopically disposed, the moving rod being connected to the driving component or the magnetic conduction component, and the driving component is driven to move horizontally through the moving rod to drive the magnetic component to move, or the magnetic conduction component is driven to move through the moving rod to approach or separate from the magnetic component.

[0015] Further, the power assembly further includes: an electromagnetic component disposed on the magnetic component and / or the magnetic conductive component, and the sand mixing device further includes: a rotation speed detection component disposed on the magnetic conductive component to detect the rotation speed of the magnetic conductive component through the rotation speed detection component; a control module respectively connected to the electromagnetic component and the rotation speed detection component, and the rotation speed detection component transmits a rotation speed signal into the control module, and the control module controls the magnitude of the current of the electromagnetic component.

[0016] Applying the technical solution of the present utility model, the sand mixing device includes a suction pipeline assembly, a discharge pipeline assembly and a power assembly. A first liquid inlet is provided on the suction pipeline assembly, and a first liquid discharge port is provided on the discharge pipeline assembly. A power assembly is respectively communicated between the first liquid inlet and the sand mixing tank and between the first liquid discharge port and the sand mixing tank. Among them, the power assembly includes a driving component, a speed regulating assembly and a pump body. The speed regulating assembly includes a magnetic component and a magnetic conductive component. At least a part of the magnetic component is opposite to the magnetic conductive component, and the rotation speed of the magnetic conductive component is adjustably arranged. The driving component is connected to the magnetic component, and the magnetic conductive component is connected to the pump body. In this way, during the operation of the power assembly as the transmission power of the material, the material flow in the suction pipeline assembly and the discharge pipeline assembly is accelerated. At the same time, during the operation of the power assembly, the driving component drives the pump body to work through the speed regulating assembly. Compared with the prior art, the frequency converter is omitted, and the speed regulating function is realized by changing the magnetic induction intensity. There is no direct mechanical connection between the magnetic component and the magnetic conductive component, and functions such as non-contact wear, quick start and vibration isolation can be realized. At the same time, harmonic pollution and electromagnetic interference are avoided, and the environmental adaptability is strong. It can work in harsh environments such as humidity, dust or flammable and explosive environments, and solves the problem that the high failure rate of the sand mixing device is easily caused by harmonic interference when using a frequency converter for speed regulation in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 shows a schematic structural diagram of the sand mixing device according to the first perspective of the present utility model;

[0019] Figure 2 shows a schematic structural diagram of the sand mixing device according to the second perspective of the present utility model;

[0020] Figure 3 shows a schematic structural diagram of the power assembly of the sand mixing device according to the present utility model;

[0021] Figure 4 shows a schematic structural diagram of the first embodiment of the speed regulating assembly in the sand mixing device according to the present utility model;

[0022] Figure 5 Shows a schematic diagram of the cooperation between the magnetic component and the magnetic conductive component in the speed regulation component of the sand mixing equipment according to the present utility model;

[0023] Figure 6 Shows a schematic structural diagram of the first embodiment of the electromagnetic component in the sand mixing equipment according to the present utility model;

[0024] Figure 7 Shows a schematic structural diagram of the second embodiment of the electromagnetic component in the sand mixing equipment according to the present utility model;

[0025] Figure 8 Shows a schematic structural diagram of the second embodiment of the speed regulation component in the sand mixing equipment according to the present utility model;

[0026] Figure 9 Shows a schematic structural diagram of the first embodiment of the cooperation between the speed regulation component and the transmission component in the sand mixing equipment according to the present utility model;

[0027] Figure 10 Shows a schematic structural diagram of the second embodiment of the cooperation between the speed regulation component and the transmission component in the sand mixing equipment according to the present utility model;

[0028] Figure 11 Shows a schematic structural diagram of the cooperation between the speed regulation component and the transmission component in the sand mixing equipment according to the present utility model;

[0029] Figure 12 Shows a schematic structural diagram of the third embodiment of the speed regulation component in the sand mixing equipment according to the present utility model;

[0030] Figure 13 Shows a schematic structural diagram of the fourth embodiment of the speed regulation component in the sand mixing equipment according to the present utility model;

[0031] Figure 14 Shows a schematic structural diagram of the fifth embodiment of the speed regulation component in the sand mixing equipment according to the present utility model;

[0032] Figure 15 Shows a schematic structural diagram of the sixth embodiment of the speed regulation component in the sand mixing equipment according to the present utility model;

[0033] Figure 16 Shows the first pipeline schematic diagram of the sand mixing equipment according to the present utility model.

[0034] Among them, the above-mentioned drawings include the following reference numerals:

[0035] 10. Driving component; 20. Speed regulation component; 21. Magnetic component; 22. Magnetic conduction component; 23. Electromagnetic component; 30. Pump body; 210. Disk body; 211. Permanent magnet; 212. First permanent magnet body; 213. Second permanent magnet body; 214. Coupling space; 221. First magnetic conduction body; 222. Second magnetic conduction body; 40. Transmission component; 41. Transmission gear; 42. Transmission rack; 50. Rotation speed detection component; 60. Control module; 11. Input shaft; 25. Output shaft

[0036] 1. Suction pump; 2. Flow control valve; 3. Sand mixing tank; 4. Auger; 5. Discharge pump; 6. Drain port; 81. Suction flowmeter; 82. Discharge flowmeter; 93. Sand conveying hopper; 500. Discharge pipe manifold; 501. Liquid discharge port; 100. Suction pipe manifold; 101. Liquid inlet; 89. Liquid storage tank Specific implementation mode

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments

[0038] Please refer to Figures 1 to 16 , the present utility model provides a sand mixing device, including: a suction pipe manifold 100, on which a liquid inlet 101 is provided; a discharge pipe manifold 500, on which a liquid discharge port 501 is provided; a power assembly, a power assembly is respectively connected between the liquid inlet 101 and the sand mixing tank 3 and between the liquid discharge port 501 and the sand mixing tank 3, wherein the power assembly includes: a driving component 10; a speed regulation component 20, the speed regulation component 20 includes a magnetic component 21 and a magnetic conduction component 22, at least part of the magnetic component 21 is opposite to the magnetic conduction component 22, the rotation speed of the magnetic conduction component 22 is set to be adjustable, and the driving component 10 is connected to the magnetic component 21; a pump body 30, and the magnetic conduction component 22 is connected to the pump body 30

[0039] According to the sand mixing equipment provided by the present utility model, it includes an inlet pipe assembly 100, a discharge pipe assembly 500 and a power assembly. An inlet liquid port 101 is provided on the inlet pipe assembly 100, and a discharge liquid port 501 is provided on the discharge pipe assembly 500. The power assembly is respectively connected at the inlet liquid port 101 and the discharge liquid port 501. Among them, the power assembly includes a driving component 10, a speed regulating assembly 20 and a pump body 30. The speed regulating assembly 20 includes a magnetic component 21 and a magnetically conductive component 22. At least part of the magnetic component 21 is opposite to the magnetically conductive component 22. The rotation speed of the magnetically conductive component 22 is set to be adjustable. The driving component 10 is connected to the magnetic component 21, and the magnetically conductive component 22 is connected to the pump body 30. In this way, during the operation of the power assembly as the transmission power of the material, the material flow in the inlet pipe assembly 100 and the discharge pipe assembly 500 is accelerated. At the same time, during the operation of the power assembly, the driving component 10 drives the pump body 30 to work through the speed regulating assembly 20. Compared with the prior art, the frequency converter is omitted, and the speed regulating function is realized by changing the magnetic induction intensity. There is no direct mechanical connection between the magnetic component 21 and the magnetically conductive component 22, and functions such as non-contact wear, quick start and vibration isolation can be realized. At the same time, harmonic pollution and electromagnetic interference are avoided, and the environmental adaptability is strong. It can work in harsh environments such as humidity, dust or flammable and explosive, solving the problem that the frequency converter speed regulation in the prior art is prone to harmonic interference, resulting in a relatively high failure rate of the sand mixing equipment.

[0040] Furthermore, the sand mixing equipment provided by the present utility model is used for liquid pumping at the fracturing and cementing operation sites. It can transmit information such as the rotation speed, temperature, vibration, etc. of the power assembly to the local control system, and can communicate with the instrument equipment in the well site or the remote control system outside the well site. The remote control of the equipment can be realized through the remote control system inside or outside the well site. Remote control can reduce the impact of the harsh environment on personnel beside the equipment, improve the decision-making and execution speed of centralized control personnel, quickly execute the requirements of the vehicle group operation, perform remote automatic control, and emergency stop control. It can cooperate with at least one of the associated liquid level gauges, flow meters, and pressure sensors to achieve automatic control. The real-time temperature, rotation speed, vibration and other sensor values, as well as the power of the prime mover (motor), can be displayed on the control interfaces of the local and remote control systems. Fault warning information, such as overheating and abnormal vibration, can be given through parameters and control logic. Abnormal problems such as jamming of the power assembly (the motor rotation speed is normal, and the rotation speed of the output shaft of the power assembly is lower than the motor rotation speed by a certain proportion for a long time) can also be judged by combining information such as motor parameters, current, voltage, power and rotation speed.

[0041] Specifically, in the first embodiment provided by the present application, the power assembly further includes: an electromagnetic component 23, which is arranged on the magnetic component 21 and / or the magnetic conductive component 22, and the magnitude of the current in the electromagnetic component 23 is adjustably set. By arranging the electromagnetic component 23 on the magnetic component 21 and / or the magnetic conductive component 22, the magnitude of the current passing through the electromagnetic component 23 is adjusted, so as to adjust the coupling magnetic force between the magnetic component 21 and the magnetic conductive component 22, and further adjust the rotation speed of the magnetic conductive component 22. And / or, the magnetic component 21 is a permanent magnetic component.

[0042] As Figure 6 and Figure 7 shown, an electromagnetic component 23 is arranged on the magnetic component 21. The magnetic component 21 includes a disk body 210; the electromagnetic component 23 is embedded in the disk body 210, and there are multiple electromagnetic components 23, and the multiple electromagnetic components 23 are arranged at intervals along the circumferential direction of the disk body 210. Preferably, the adjacent two electromagnetic components 23 are of opposite polarities. By arranging each electromagnetic component 23 evenly, the induced magnetic field generated by the magnetic component 21 is evenly distributed, so that the magnetic conductive component 22 can rotate smoothly.

[0043] Further, the magnetic component 21 and the magnetic conductive component 22 are respectively of a disk structure. As Figure 4 and Figure 5 shown, the magnetic component 21 further includes: a permanent magnet 211, which is embedded in the disk body 210, and there are multiple permanent magnets 211, and the multiple permanent magnets 211 are arranged at intervals along the circumferential direction of the disk body 210; wherein, the diameter of the circumferential surface where each permanent magnet 211 is located is greater than or less than the diameter of the circumferential surface where each electromagnetic component 23 is located; or, the multiple permanent magnets 211 and the multiple electromagnetic components 23 are alternately arranged at intervals in sequence. By using the permanent magnet 211 and the electromagnetic component 23 in combination, a stable coupling magnetic force can be generated between the magnetic component 21 and the magnetic conductive component 22, and the change of the magnetic induction intensity is adjusted by adjusting the magnitude of the current of each electromagnetic component 23.

[0044] In specific implementation, the electromagnetic component 23 is of a strip structure, and the length direction of the electromagnetic component 23 is consistent with the axis direction of the disk body 210; or, the length direction of the electromagnetic component 23 is consistent with the radial direction of the disk body 210. When the length direction of the electromagnetic component 23 is consistent with the axis direction of the disk body 210, as Figure 6 shown, on the circumferential end surface of the disk body 210, the adjacent two electromagnetic components 23 are of opposite polarities, that is, the N poles and S poles of each electromagnetic component 23 are alternately arranged; or, when the length direction of the electromagnetic component 23 is consistent with the radial direction of the disk body 210, the adjacent two electromagnetic components 23 are of opposite polarities, that is, the S pole of one electromagnetic component 23 and the N pole of another adjacent electromagnetic component 23 are located on the same circumferential surface.

[0045] In the second embodiment provided by the present utility model, the sand mixing equipment further includes: AsFigures 9 to 11 As shown, the transmission assembly 40 has at least a part thereof movably arranged. The transmission assembly 40 is connected to the magnetic component 21 and / or the magnetic conductive component 22, and drives the magnetic component 21 and / or the magnetic conductive component 22 to move in a direction approaching or separating from each other through the transmission assembly 40. By making the magnetic component 21 and the magnetic conductive component 22 approach or separate from each other, the separation gap D between the magnetic component 21 and the magnetic conductive component 22 is adjusted, so as to achieve the purpose of adjusting the strength of the magnetic field between the magnetic component 21 and the magnetic conductive component 22. The magnetic field strength between the magnetic component 21 and the magnetic conductive component 22 changes proportionally with the separation gap D. When the input rotational speed of the driving component 10 is constant, by changing the separation gap D, the magnetic field strength between the two changes, and a slipping phenomenon will occur between the magnetic component 21 and the magnetic conductive component 22. The larger the separation gap D, the larger the slipping amount and the more obvious the deceleration. The rotational speed sensor measures the rotational speed of the output shaft in real time and feeds it back to the controller.

[0046] Specifically, in one embodiment, the transmission assembly 40 includes: a transmission gear 41 arranged on the driving component 10, and the transmission gear 41 is rotatably arranged around its own axis; a transmission rack 42 arranged below the driving component 10, and the transmission gear 41 meshes with the transmission rack 42, so as to drive the driving component 10 to move horizontally during the rotation of the transmission gear 41, so that the driving component 10 drives the magnetic component 21 to move. In another embodiment provided by the present utility model, the transmission assembly 40 includes a moving rod, the moving rod is telescopically arranged, the moving rod is connected to the driving component 10 or the magnetic conductive component 22, and the driving component 10 is driven to move horizontally through the moving rod to drive the magnetic component 21 to move, or the magnetic conductive component 22 is driven to move through the moving rod to approach or separate from the magnetic component 21; specifically, the moving rod is a piston rod of a cylinder or an electric push rod or a hydraulic rod, etc.

[0047] During the specific implementation process, when the magnetic component 21 and the magnetic conductive component 22 are respectively in a disk structure, the magnetic component 21 is a permanent magnetic disk, the magnetic conductive component 22 is a magnetic conductive disk, the input shaft of the speed governor receives the power from the output end of the motor, drives the permanent magnetic disk to rotate, the magnetic conductive disk cuts the magnetic lines of force, resulting in the generation of eddy currents in the disk. Due to the interaction between the induced magnetic field and the permanent magnet magnetic field, the magnetic conductive disk will rotate. The magnetic conductive disk is rigidly connected to the load shaft and drives the load shaft to rotate. The permanent magnetic disk and the magnetic conductive disk are coupled by magnetic force, and there is a slipping phenomenon. The rotational speed ratio between the two is usually greater than 1. By controlling the rotation of the gear through the controller, the motor and the permanent magnetic disk are driven to move, so as to realize the change of the coupling magnetic force intensity between the permanent magnetic disk and the magnetic conductive disk, and further realize the change of the rotational speed of the magnetic conductive disk.

[0048] In the embodiment of the speed regulation assembly provided by the present utility model:

[0049] Embodiment 1:

[0050] As Figure 4 and Figure 5 shown, the magnetic component 21 and the magnetic conduction component 22 are respectively disk structures.

[0051] Embodiment 2:

[0052] The magnetic component 21 and the magnetic conduction component 22 are respectively cylindrical structures. As Figure 8 shown, the magnetic component 21 includes: a first permanent magnet body 212; a second permanent magnet body 213 disposed on the first permanent magnet body 212, the second permanent magnet body 213 being disposed along the circumferential direction of the first permanent magnet body 212 and extending along the axial direction of the first permanent magnet body 212 to enclose a coupling space 214; at least a part of the magnetic conduction component 22 is disposed in the coupling space 214, and the electromagnetic component 23 is disposed on the magnetic conduction component 22. In this embodiment, the relative area between the magnetic component 21 and the magnetic conduction component 22 is increased, the coupling magnetic force is enhanced, and the driving component 10 is drivingly connected to the first permanent magnet body 212.

[0053] In this embodiment, the magnetic conduction component 22 includes: a first magnetic conduction body 221 opposite to the first permanent magnet body 212, at least a part of the first magnetic conduction body 221 being disposed in the coupling space 214; a second magnetic conduction body 222 disposed on the first magnetic conduction body 221 and along the circumferential direction of the first magnetic conduction body 221, the second magnetic conduction body 222 extending from the first magnetic conduction body 221 in a direction away from the first permanent magnet body 212, at least a part of the second magnetic conduction body 222 being opposite to the second permanent magnet body 213; the electromagnetic component 23 is disposed on the second magnetic conduction body 222. By disposing the electromagnetic component 23 on the second magnetic conduction body 222, the coupling magnetic force between the magnetic conduction component 22 and the magnetic component 21 is adjusted by adjusting the magnitude of the current in the electromagnetic component 23. The output shaft 25 of the first magnetic conduction body 221 is drivingly connected to the pump body 30. The magnetic component 21 and the magnetic conduction component 22 are in a drum structure to increase the coupling magnetic force. The permanent magnet drum is composed of a non-magnetic drum, permanent magnets, etc. The permanent magnets are annularly embedded inside the drum, and adjacent permanent magnets are of opposite polarities. By changing the magnetic strength of the electromagnet through the controller, the coupling magnetic force between the permanent magnet drum and the magnetic conduction drum is affected.

[0054] The electromagnetic component 23 is disposed on a side of the second magnetic conduction body 222 away from the second permanent magnetic body 213; there are a plurality of electromagnetic components 23, and the plurality of electromagnetic components 23 are arranged at intervals along the circumferential direction of the second magnetic conduction body 222, and each electromagnetic component 23 and the second magnetic conduction body 222 are of an integrally formed structure. Such an arrangement avoids the electromagnetic component 23 occupying the space between the magnetic component 21 and the magnetic conduction component 22, makes the overall structure more compact, and fully utilizes the position between the second magnetic conduction body 222 and the first magnetic conduction body 221. In this embodiment, the electromagnetic component 23 is of a strip structure, the length direction of the electromagnetic component 23 is consistent with the axis direction of the second magnetic conduction body 222, and the adjacent two electromagnetic components 23 are of opposite polarities.

[0055] Embodiment Three:

[0056] As Figure 12 shown, the difference from Embodiment Two is that the second magnetic conduction body 222 extends from the first magnetic conduction body 221 in a direction approaching the first permanent magnetic body 212.

[0057] Embodiment Four:

[0058] As Figure 13 shown, the difference from Embodiment Three is that there are two second permanent magnetic bodies 213, the two second permanent magnetic bodies 213 are arranged at intervals along the radial direction of the first permanent magnetic body 212, and at least a part of the second magnetic conduction body 222 is inserted between the two second permanent magnetic bodies 213.

[0059] Embodiment Five:

[0060] As Figure 14 shown, the difference from Embodiment Four is that the two second permanent magnetic bodies 213 enclose a first coupling space and a second coupling space, the diameter of the first coupling space is larger than that of the second coupling space; there are a plurality of second magnetic conduction bodies 222, and the plurality of second magnetic conduction bodies 222 are arranged at intervals along the radial direction of the first magnetic conduction body 221, wherein, one second magnetic conduction body 222 is inserted into the first coupling space, and the other or the remaining plurality of second magnetic conduction bodies 222 are inserted into the second coupling space.

[0061] Embodiment Six:

[0062] As Figure 15 shown, the difference from Embodiment Five is that among the plurality of second magnetic conduction bodies 222, one second magnetic conduction body 222 relatively close to the circumferential side surface of the first magnetic conduction body 221 is located outside the second permanent magnetic body 213.

[0063] Among them, for the specific structure of the speed regulation component 20 in the above-mentioned first to sixth embodiments, an electromagnetic component 23 can be provided on the magnetic conduction component 22; or the separation gap between the magnetic force component 21 and the magnetic conduction component 22 can be adjusted by directly adopting the method of increasing the transmission component 40.

[0064] The magnetic force component 21 and the magnetic conduction component 22 of the speed regulation component 20 in the above-mentioned first to sixth embodiments are also applicable to the above-mentioned transmission component 40. Only the permanent magnetic disk and the magnetic conduction disk are changed to rollers to enhance the coupling magnetic force. The permanent magnetic roller is composed of a non-magnetic roller, a permanent magnet, etc. The permanent magnet is annularly embedded inside the roller, and adjacent permanent magnets are of opposite polarities. The separation gap D between the permanent magnetic cylinder and the magnetic conduction cylinder is changed by controlling the movement of the gear-rack mechanism by the controller to adjust the coupling magnetic force between the permanent magnetic roller and the magnetic conductor.

[0065] The sand mixing equipment further includes: a rotation speed detection component 50, which is arranged on the magnetic conduction component 22 to detect the rotation speed of the magnetic conduction component 22 through the rotation speed detection component 50; a control module 60, which is respectively connected to the electromagnetic component 23 and the rotation speed detection component 50. The rotation speed detection component 50 transmits the rotation speed signal into the control module 60, and the current magnitude of the electromagnetic component 23 is controlled through the control module 60. Preferably, the rotation speed detection component 50 is a rotation speed sensor, and the rotation speed sensor is installed on the output shaft 25 of the magnetic conduction component 22.

[0066] In the specific implementation process, when the magnetic force component 21 and the magnetic conduction component 22 with a roller structure are adopted, a movable shielding plate can also be arranged between the second magnetic conduction body 222 and the second permanent magnetic body 213, and the relative area between the magnetic force component 21 and the magnetic conduction component 22 is adjusted by moving the shielding plate, so as to adjust the magnitude of the coupling magnetic force between the magnetic force component 21 and the magnetic conduction component 22.

[0067] In this application, the driving component 10 is a driving motor, and the driving shaft of the motor is drivingly connected to the magnetic force component 21 through the input shaft 11.

[0068] Furthermore, in the sand mixing equipment of this application, an energy recovery component can also be added. When there is a speed difference between the permanent magnetic outer conductor and the winding inner conductor, an induced electromotive force is generated in the winding. When the winding is connected, an induced current loop is formed. Controlling the magnitude of the induced current in the winding controls the magnitude of the transmitted torque, so as to achieve the functions of speed regulation and soft start. Specifically, a current loop is led out from the output end of the magnetic conduction component to recycle the current generated by the induced electromotive force.

[0069] In the actual use process, the oilfield liquid transportation equipment adopts an electric motor + electromagnetic or permanent magnet speed regulation device + impeller pump (including centrifugal pump, cam rotor pump, open impeller centrifugal pump, closed impeller centrifugal pump, and other impeller - type transportation pumps). A speed sensor is installed at the load end (the load output end of the permanent magnet speed regulator or the centrifugal pump shaft, etc.), and a flowmeter and a pressure sensor are installed at the liquid discharge port of the centrifugal pump. The equipment control system collects the data of the load speed, flowmeter, and pressure sensor. In necessary cases, supporting sensors of the commissioning mechanism are installed to directly monitor the distance between two conductors. For example, the disc - type permanent magnet speed regulation monitors the distance between the permanent magnet and the magnetic conductor through a sensor, and can also monitor the distance between the permanent magnet cylinder and the magnetic conductor cylinder of the cylindrical permanent magnet speed regulator. Monitor the execution position of the speed regulation actuator, such as the angle that the gear rotates or the rack displacement in the rack - and - pinion mechanism. According to the on - site operation requirements, the pump speed can be controlled manually or automatically. In the manual mode, the speed is adjusted through the control panel knob, or the control can be achieved by inputting the speed.

[0070] Generally, there are two automatic control methods based on flow and pressure. For example, according to the set flow value or the required flow value provided by other systems, the flowmeter value and the pump speed are read. When the values are different from the set values, the PID algorithm is used to automatically adjust the actuator of the speed regulation device. The actuator of the speed regulation device adjusts the position of the permanent magnet component or the magnetic conductor component, changes the area or distance of magnetic force coupling, changes the intensity of cutting the magnetic induction line, changes the impeller speed, and thus changes the flow rate. The control method of the automatic pressure value is similar to the automatic flow control. According to the set pressure value or the required pressure value provided by other systems, the control is achieved through the PID control algorithm.

[0071] As Figure 16 shown, during the operation of the equipment, the control system can analyze some parameters and alarm for abnormal situations. For example, during the operation of the centrifugal pump for the sand - mixing equipment discharge, according to the operation requirements, the pressure of the discharge pipe of the centrifugal pump for the sand - mixing equipment discharge needs to maintain a certain value, usually higher than 0.4 MPa. When the actuator reaches the maximum value and the centrifugal pump speed reaches the maximum rated value, but the pressure is still lower than 0.4 MPa, the system issues an alarm: centrifugal pump failure or insufficient liquid supply. When the control system issues an instruction and the actuator reaches a certain distance, and the difference between the centrifugal pump speed and the expected speed is still ≥5% within 60 s after adjustment, the system issues an alarm: speed regulation system or centrifugal pump failure.

[0072] The actuator usually receives a 4-20 mA signal to achieve speed regulation of 0-97% or 0-98%. The permanent magnet speed regulation device is also equipped with sensors for monitoring the temperature of the magnetic conduction component and the bearing temperature. When the temperature of the magnetic conductor or the bearing reaches the alarm value, an alarm signal is sent to the equipment control system. The system sends a signal to the permanent magnet speed regulation device according to safety requirements, and displays the alarm information through sound, light or the screen, and disengages the permanent magnet speed regulation device to avoid problems such as bearing failure and permanent magnet demagnetization.

[0073] Figure 16 It is a pipe manifold for sand mixing equipment, including an inlet pipe manifold 100, an inlet pump 1, a flow control valve 2, a sand mixing tank 3, an auger 4, a discharge pump 5, a sewage outlet 6 and a discharge pipe manifold 500. The inlet pump 1 and the flow control valve 2 are connected in series on the input pipeline. The input pipeline is connected to the sand mixing tank 3. An auger 4 is arranged on the side of the sand mixing tank 3 for inputting raw materials into the sand mixing tank 3. A sewage outlet 6 is arranged at the bottom of the sand mixing tank 3. In addition, the discharge pump 5 is arranged on the output pipeline, and the output pipeline is arranged in parallel with the input pipeline. The inlet pump 1 and the flow control valve 2 are connected through an inlet flowmeter 81. The outlet end of the discharge pump 5 is connected with a discharge flowmeter 82. The material inhaled from the liquid inlet 101 of the inlet pipe manifold 100 flows through the inlet pump 1, the inlet flowmeter 81 and the flow control valve 2 and then flows into the sand mixing tank 3. The material flowing out of the sand mixing tank 3 flows through the discharge pump 5 and the discharge flowmeter 82 in sequence, and then is discharged through the discharge port 501 of the discharge pipe manifold 500.

[0074] Specifically, as Figure 1 and Figure 2 shown, the sand mixing equipment further includes a sand feeding hopper 93. A pump body 30, a speed regulation component 20 and a driving component 10 are arranged in sequence at the liquid inlet 101 of the inlet pipe manifold 100. After the liquid in the inlet pipe manifold 100 passes through the pump body 30, it is mixed with the sand grains conveyed by the auger 4, the chemicals conveyed by the liquid storage tank 89, etc. in the sand mixing tank 3, and then transported to the discharge pipe manifold 500 through the discharge pump 5. Along the output direction of the material, a pump body 30, a speed regulation component 20 and a driving component 10 are arranged in sequence at the discharge port 501 of the discharge pipe manifold 500. After the material passes through the pump body 30, it is transported to the fracturing pump or other equipment through the discharge pipe manifold 500 through the discharge port 501. It should be noted here that in the sand mixing equipment of the present application, two sets of power components are included, and the two sets of power components are respectively used for the suction and discharge of materials.

[0075] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0076] According to the sand mixing equipment provided by the present utility model, it includes a suction manifold 100, a discharge manifold 500 and a power assembly. A liquid inlet 101 is provided on the suction manifold 100, and a liquid discharge port 501 is provided on the discharge manifold 500. For the power assembly, between the liquid inlet 101 and the sand mixing tank 3, and between the liquid discharge port 501 and the sand mixing tank 3, there are respectively communicated with the power assembly. Among them, the power assembly includes a driving component 10, a speed regulating assembly 20 and a pump body 30. The speed regulating assembly 20 includes a magnetic component 21 and a magnetically conductive component 22. At least part of the magnetic component 21 is opposite to the magnetically conductive component 22, and the rotational speed of the magnetically conductive component 22 is set to be adjustable. The driving component 10 is connected to the magnetic component 21, and the magnetically conductive component 22 is connected to the pump body 30. In this way, during the operation of the power assembly as the transmission power of the material, the material flow in the suction manifold 100 and the discharge manifold 500 is accelerated. At the same time, during the operation of the power assembly, the driving component 10 drives the pump body 30 to work through the speed regulating assembly 20. Compared with the prior art, the frequency converter is omitted, and the speed regulating function is realized by changing the magnetic induction intensity. There is no direct mechanical connection between the magnetic component 21 and the magnetically conductive component 22, and functions such as non-contact wear, quick start and vibration isolation can be achieved. At the same time, harmonic pollution and electromagnetic interference are avoided, and the environmental adaptability is strong. It can work in harsh environments such as humidity, dust or flammable and explosive environments, solving the problem in the prior art that the use of frequency converter speed regulation is prone to harmonic interference, resulting in a relatively high failure rate of the sand mixing equipment.

[0077] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sand mixing device, characterized in that: include: A suction manifold (100), wherein the suction manifold (100) is provided with a liquid inlet (101); A discharge manifold (500), wherein the discharge manifold (500) is provided with a liquid discharge port (501); A power component is connected between the liquid inlet (101) and the sand mixing tank (3), and between the liquid discharge port (501) and the sand mixing tank (3). Wherein, the power assembly comprises: A driving component (10); A speed regulating component (20), the speed regulating component (20) comprising a magnetic component (21) and a magnetic conductive component (22), at least a portion of the magnetic component (21) being opposite to the magnetic conductive component (22), the rotation speed of the magnetic conductive component (22) being adjustable, and the driving component (10) being connected to the magnetic component (21); A pump body (30), wherein the magnetic conductive component (22) is connected to the pump body (30).

2. The sand mixing equipment according to claim 1, characterized in that: The magnetic component (21) is a permanent magnetic component; and / or the power assembly further comprises: The electromagnetic component (23) is arranged on the magnetic component (21) and / or the magnetic conductive component (22), and the current size of the electromagnetic component (23) can be adjusted.

3. The sand mixing equipment according to claim 1, characterized in that: The magnetic component (21) comprises: A first permanent magnet body (212); A second permanent magnet body (213) is arranged on the first permanent magnet body (212), the second permanent magnet body (213) is arranged along the circumferential direction of the first permanent magnet body (212), and the second permanent magnet body (213) extends along the axial direction of the first permanent magnet body (212) to enclose a coupling space (214); At least a portion of the magnetic conductive component (22) is disposed in the coupling space (214).

4. The sand mixing equipment according to claim 3, characterized in that: The magnetic conductive component (22) comprises: A first magnetic conductive body (221), opposite to the first permanent magnetic body (212), wherein at least a portion of the first magnetic conductive body (221) is disposed in the coupling space (214); The second magnetic conductive body (222) is arranged on the first magnetic conductive body (221) and along the circumferential direction of the first magnetic conductive body (221); the second magnetic conductive body (222) extends from the first magnetic conductive body (221) in a direction away from the first permanent magnetic body (212); at least a portion of the second magnetic conductive body (222) is opposite to the second permanent magnetic body (213).

5. The sand mixing equipment according to claim 2, characterized in that: The magnetic component (21) is provided with an electromagnetic component (23), and the magnetic component (21) comprises a disk body (210); The electromagnetic component (23) is embedded in the disk body (210), there are a plurality of electromagnetic components (23), and the plurality of electromagnetic components (23) are arranged at intervals along the circumferential direction of the disk body (210).

6. The sand mixing equipment according to claim 5, characterized in that: The magnetic component (21) further comprises: A permanent magnet (211) is embedded in the disk body (210), the permanent magnet (211) is multiple, and the multiple permanent magnets (211) are arranged at intervals along the circumferential direction of the disk body (210); The diameter of the circumferential surface where each permanent magnet (211) is located is larger or smaller than the diameter of the circumferential surface where each electromagnetic component (23) is located; or, a plurality of permanent magnets (211) and a plurality of electromagnetic components (23) are alternately arranged in sequence.

7. The sand mixing equipment according to claim 5, characterized in that: The electromagnetic component (23) is a bar-shaped structure, and the length direction of the electromagnetic component (23) is consistent with the axial direction of the disk body (210); or, The length direction of the electromagnetic component (23) is consistent with the radial direction of the disk body (210).

8. The sand mixing equipment according to claim 1, characterized in that: The sand mixing equipment also includes: A transmission assembly (40), wherein at least a portion of the transmission assembly (40) is movably arranged, the transmission assembly (40) is connected to the magnetic component (21) and / or the magnetic conductive component (22), and the transmission assembly (40) drives the magnetic component (21) and / or the magnetic conductive component (22) to move in a direction approaching or moving away from each other.

9. The sand mixing equipment according to claim 8, characterized in that: The transmission assembly (40) comprises: A transmission gear (41) is arranged on the driving component (10), and the transmission gear (41) is rotatably arranged around its own axis; A transmission rack (42) is arranged below the driving component (10), and the transmission gear (41) is meshed with the transmission rack (42) so as to drive the driving component (10) to move in a horizontal direction during the rotation of the transmission gear (41), so that the driving component (10) drives the magnetic component (21) to move; or, The transmission assembly (40) comprises: A moving rod, wherein the moving rod is telescopically arranged and connected to the driving component (10) or the magnetic conductive component (22), and the driving component (10) is driven to move in a horizontal direction by the moving rod to drive the magnetic component (21) to move, or the magnetic conductive component (22) is driven to move to approach or move away from the magnetic component (21).

10. The sand mixing equipment according to claim 1, characterized in that: The power assembly further comprises: an electromagnetic component (23), which is arranged on the magnetic component (21) and / or the magnetic conductive component (22); the sand mixing device further comprises: A rotation speed detection component (50) is arranged on the magnetic conductive component (22), and the rotation speed of the magnetic conductive component (22) is detected by the rotation speed detection component (50); The control module (60) is connected to the electromagnetic component (23) and the rotation speed detection component (50) respectively. The rotation speed detection component (50) transmits the rotation speed signal to the control module (60), and the current of the electromagnetic component (23) is controlled by the control module (60).

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