Direct drive type spiral vane pump and water pump control system

Abstract

The invention discloses a direct drive type spiral vane pump and a water pump control system, which comprise a stator, a rotor rotationally matched in the stator, an electric drive winding arranged on the stator and used for driving the rotor to rotate, and a spiral vane arranged in the rotor, the stator is provided with a power supply assembly used for providing electric energy for the electric drive winding. The invention provides a direct-driven spiral vane pump and a water pump control system, which can be directly connected in series on a water supply pipeline to reduce the installation space of a water pump, and a rotor directly drives vanes, so that a transmission part is omitted, the pumping power is high, the pump can operate for a long time at a low speed, and stable pressure can be maintained. In addition, multi-stage pressurization can be achieved after a plurality of pumps are connected in series, and therefore the water supply system is suitable for building water supply pipelines of any length.

Description

Technical Field

[0001] The invention relates to the technical field of water pumps, in particular to a direct-drive spiral vane pump and a water pump control system. Background Art

[0002] A water pump is a machine that transports liquid or pressurizes liquid. It is widely used in various water supply systems to pressurize and transport liquid in water supply pipelines. However, with the growth of water supply pipelines, the requirements for water pump power also increase. In particular, long-distance water supply pipelines or high-rise water supply often require high-power water pumps for pumping. However, the existing various types of high-power water pumps, mainly axial flow pumps and centrifugal pumps, generally have the disadvantages of high equipment cost, large space occupation, and long maintenance time after failure. In addition, the high pressure generated by such high-power water pumps at the water outlet also requires high pressure resistance of the water supply pipeline. It is precisely because of the above-mentioned shortcomings of existing water pumps that the water cost of long-distance water supply or high-rise water supply remains high. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent: to provide a direct-drive spiral blade pump, which can be directly connected in series on a water supply pipeline to reduce the installation space of the water pump, and the rotor directly drives the blades, eliminating the transmission components, so that the pumping power is large, and multiple pumps can achieve multi-stage pressurization after being connected in series, so it is suitable for the construction of water supply pipelines of any length.

[0004] To this end, the first purpose of the present invention is to propose a direct-drive helical vane pump, including a stator, a rotor that rotates in the stator, an electric drive winding arranged on the stator and used to drive the rotor to rotate, and a helical blade placed in the rotor, the helical blade is connected to the rotor, and the stator is provided with a power supply component for providing electrical energy to the electric drive winding. The rotor and the helical blades in the rotor rotate in the stator by direct drive, so that the rotation torque can be large; at the same time, the use of spiral helical blades instead of conventional fan blades makes the water flow in the rotor cavity contact with the spiral blades for a longer time and a larger contact area, so that under the same speed, the spiral blade can provide a greater water flow driving force than the conventional blade; finally, because the water flow directly passes through the rotor, the cooling and heat dissipation effect of the entire pump is better.

[0005] According to an example of the present invention, the outer edge of the spiral blade is fixedly connected to the inner wall of the rotor.

[0006] According to an example of the present invention, the spiral blade has a central shaft extending along its central axis, and the central shaft is fixedly connected to the rotor via a connecting rod.

[0007] According to an example of the present invention, the outer edge of the spiral blade is in contact with the inner wall of the rotor.

[0008] According to an example of the present invention, a guide cone is provided at the front end of the central axis.

[0009] According to an example of the present invention, two ends of the stator are respectively provided with pipe joints.

[0010] According to an example of the present invention, a water pipe communicating with the stator is provided on at least one end of the stator, and a pipe joint located on one side of the water pipe is installed at the end of the water pipe away from the stator.

[0011] According to an example of the present invention, water pipes are provided on both ends of the stator.

[0012] According to an example of the present invention, the power supply assembly includes wiring terminals arranged on the pipe joint, the wiring terminals are electrically connected to the electric drive windings on the stator, and the wiring terminals at each stator end are configured to match the wiring terminals on the adjacent stator.

[0013] According to an example of the present invention, at least two wiring terminals are provided on any pipe joint, and each wiring terminal is electrically connected to the electric drive winding through a corresponding wire.

[0014] According to one example of the present invention, at least one extension tube is included, both ends of the extension tube are provided with water pipe joints matching the pipe joint, and the water pipe joint has a plug joint matching the wiring terminals on the pipe joint, the plug joints at both ends of the extension tube are electrically connected through built-in wires, and when the water pipe joint is connected to the pipe joint, the wiring terminals are electrically connected to the plug joint.

[0015] According to an example of the present invention, a controller is provided on the stator, and the controller is communicatively connected with the electric drive winding.

[0016] According to an example of the present invention, at least two rotors are rotatably coupled inside the stator, the rotors are arranged in sequence along the axial direction, and electric drive windings are provided at positions corresponding to each rotor in the stator, at least two of the rotors rotate in opposite directions, and the spiral blades in any two rotors with opposite rotation directions have opposite rotation directions.

[0017] According to an example of the present invention, two rotors are provided in the stator, a fixed block is provided between the two rotors, an intermediate flow channel is provided in the fixed block and axially passes through both ends of the fixed block, the intermediate flow channel is spiral near the two ends, and the rotation direction of the spiral channel at the end of the intermediate flow channel is the same as the rotation direction of the spiral blade in the corresponding rotor.

[0018] The above technical solution has the following advantages or beneficial effects: First, a rotor is arranged inside the stator, and spiral blades are directly installed inside the rotor. The shaftless pump thus formed can provide greater water flow pressure at the same speed compared to a conventional axial flow pump, and because the water flow channel is directly located inside the rotor, the heat dissipation effect between the rotor and the stator is better. Secondly, because there are pipe joints at both ends of the stator, the direct-drive spiral blade pump can be added in series arbitrarily according to actual needs, which is convenient for realizing multi-stage pressurization and ensuring the flow rate of the entire water supply pipeline. Finally, by integrating the wiring terminal on the pipe joint, the circuit connection can be completed synchronously with the docking of the pipe joint, and the installation process is more integrated.

[0019] The present invention aims to solve one of the technical problems in the related art at least to a certain extent: to provide a water pump control system which can shorten the time for connecting each direct-drive spiral vane pump with a connecting pipeline.

[0020] To this end, the second object of the present invention is to provide a water pump control system, comprising a plurality of the above-mentioned direct-drive spiral vane pumps, each of which is connected in sequence along the axial direction to form a liquid supply pipeline, and each of which is respectively connected to a control host for communication, characterized in that it also includes the following control steps: S1. The control host obtains the position information of the two ends of the stator in each direct-drive spiral vane pump, and controls the rotation direction of the spiral vanes in the direct-drive spiral vane pump based on the position information, so that the liquid flow direction in the entire liquid supply pipeline remains consistent; S2, obtaining flow rate and / or pressure information at multiple positions along the axial direction in the liquid supply pipeline, and allocating output power of each direct-drive spiral vane pump based on the pressure information; S3. When water needs to be stopped at any position in the liquid supply pipeline, the control host controls the spiral blades in one or more direct-driven spiral blade pumps upstream of the water-stopping position to reverse, and the control host adjusts the reverse speed of the spiral blades based on the flow velocity in the pipe at the water-stopping position so that the flow velocity in the pipe at the water-stopping position drops to zero.

[0021] The above technical scheme has the following advantages or beneficial effects: first, there is no need to consider the orientation of any direct-drive spiral vane pump during docking with another adjacent direct-drive spiral vane pump or the pipe joint of the connecting pipe, so the operator can save the action of judging and changing the direction, making the overall pipeline construction process faster; secondly, the control host can balance the flow rate of the fluid in the pipeline by regulating the output power of each direct-drive spiral vane pump, and the overall output power is more stable and reliable; finally, the number of switch valves in the liquid supply pipeline is reduced by reversing the spiral blades in the direct-drive spiral vane pump, thereby streamlining the structure of the entire control system and reducing equipment costs.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the direct-drive spiral vane pump of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the rotor in a direct-drive spiral vane pump.

[0025] Figure 3 for Figure 2 Axial schematic diagram of .

[0026] Figure 4 It is a schematic diagram of the internal structure of the rotor with a central shaft in a direct-drive spiral vane pump.

[0027] Figure 5 for Figure 4 Axial schematic diagram of .

[0028] Figure 6 It is a structural schematic diagram of the connecting pipe in the present invention.

[0029] Figure 7 It is a schematic diagram of the internal structure of the stator with two rotors in the present invention.

[0030] Figure 8 yes Figure 7 Schematic diagram of the structure in which a fixed block is provided between the two rotors.

[0031] Among them, 1. stator; 2. rotor; 3. spiral blades; 3.1. central axis; 3.2. connecting rod; 3.3. guide cone; 4. water pipe; 5. pipe joint; 6. terminal; 7. connecting pipe; 8. water pipe joint; 9. plug joint; 10. wire; 11. controller; 12. fixing block; 13. intermediate flow channel. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] A direct-drive helical vane pump according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Water pumps can be divided into positive displacement water pumps, vane pumps and other types according to different working principles. Positive displacement pumps use the change in the volume of their working chambers to transfer energy; vane pumps use the interaction between rotating blades and water to transfer energy. There are centrifugal pumps, axial flow pumps and mixed flow pumps. In actual application, due to the efficiency and flow requirements of long-distance water supply, axial flow pumps are generally used as water pumps. Axial flow pumps obtain higher pumping pressures through the high-speed rotation of blades, so the performance requirements of motors are relatively high, especially for the water supply systems of urban high-rise buildings and long-distance water transportation between cities. The water pumps in the large water pump units used are huge. This not only requires additional water pump rooms to accommodate the above-mentioned water pump units, but also makes it difficult to repair water pumps in the event of a water pump failure. In addition, the prior art has also considered setting up multiple water pumps at intervals in the middle of the water supply pipeline to pump water by step-by-step pressure increase. Although this can meet the pumping water pressure requirements, the existing water pumps are relatively large in size due to their structural characteristics. Each additional water pump not only greatly increases the cost of the equipment itself, but also causes the entire water supply pipeline to be unable to supply water when any water pump fails. Therefore, adding too many water pumps cannot effectively and stably meet the needs of long-distance water supply. This is also a common technical problem in existing long-distance water supply and high-rise water supply.

[0035] The present invention provides a direct-drive spiral vane pump, as shown in the figure, including a tubular stator 1, a rotor 2 that rotates in the stator 1, an electric drive winding provided on the stator 1 and used to drive the rotor 2 to rotate, and a spiral blade 3 placed in the rotor 2, the spiral blade 3 is connected to the rotor 2, and the stator 1 is provided with a power supply component for providing electric energy to the electric drive winding. Thus, under the condition of the electric energy provided by the power supply component, the electric drive winding drives the rotor 2 to rotate relative to the stator 1 after being energized, and then drives the spiral blade 3 to rotate, and finally realizes the pumping of the water flow through the rotation of the spiral blade 3. It should be understood that the rotor is water-passing, so it is necessary to consider the sealing requirements of the electric drive winding in the water environment, and the maintenance of the axial position of the rotor 2 under the reaction force of the water flow, which can be achieved through various existing bearings and sealing rings. Basic rotation and waterproof requirements, in this embodiment, the above-mentioned sealing and axial positioning support for the rotation of the rotor 2 in the stator 1 can refer to the existing conventional technical means, which will not be repeated here.

[0036] In the above embodiment, the electric drive winding refers to a winding that can generate a magnetic field when powered and drive the rotor 2 to rotate relative to the stator 1 through the magnetic field. The electric drive winding is a common technology in the existing motor field, so the structure and installation position of the electric drive winding are not described in detail.

[0037] In this embodiment, the spiral blade 3 refers to a spiral blade formed by extending along the cylindrical spiral line of the inner cavity of the rotor 2. The spiral line has at least one complete lead. Therefore, the spiral blade 3 in this embodiment is different from the fan blade of the existing axial flow pump.

[0038] As one of the preferred examples of spiral blades: Figure 2 and Figure 3 As shown, the outer edge of the spiral blade 3 is fixedly connected to the inner side wall of the rotor 2. Therefore, under the rotation of the spiral blade, the water flow in the rotor can move axially under the push of the spiral blade 3. Preferably, the projection of the spiral blade 3 on the cross section is annular.

[0039] As a preferred example of the spiral blade: Figure 4 and Figure 5 As shown, the spiral blade 3 has a central shaft 3.1 extending along its central axis, and the central shaft 3.1 is fixedly connected to the rotor 2 via a connecting rod 3.2.

[0040] Preferably, the outer edge of the spiral blade 3 is in contact with the inner wall of the rotor 2 .

[0041] Preferably, a guide cone 3.3 is provided at the front end of the central axis 3.1. The guide cone 3.3 is added to improve the axial fluidity of the water flow at the water outlet and improve the vortex condition.

[0042] Based on the preference of the above embodiment, pipe joints are respectively provided at both ends of the stator 1. The ends of the stator 1 can be connected to an external water supply pipe through their respective corresponding pipe joints.

[0043] Based on the preferred embodiment above, at least one end of the stator 1 is provided with a water pipe 4 connected to the stator 1, and a pipe joint located on the side where the water pipe 4 is located is installed at the end of the water pipe 4 away from the stator 1. The water pipe 4 can be a hard pipe or a soft pipe. When the water pipe 4 is a soft pipe, it is convenient to roll up the soft pipe 4, so that it can be convenient for transportation and laying of water supply pipelines during the construction of some temporary water supply pipelines. Specifically, Figure 1 As shown, the lower end of the stator 1 is provided with a pipe joint 5, and the upper end of the water pipe 4 is provided with a pipe joint matching the pipe joint 5. Thus, the lower end of the stator 1 and / or the upper end of the water pipe 4 can be connected to other external pipelines through their respective pipe joints. Alternatively, when the stator 1 is not provided with a water pipe 4, pipe joints are provided at both ends of the stator 1. Alternatively, when both ends of the stator 1 are provided with water pipes 4, pipe joints are provided at the ends of the two water pipes 4 away from the stator 1.

[0044] Preferably, water pipes 4 are provided on both ends of the stator 1 , and the pipe joints at both ends of the stator 1 are located at end positions of the two water pipes 4 that are away from each other.

[0045] In the above embodiments, it is often necessary to build a plurality of direct-drive spiral vane pumps for the entire water supply pipeline. The electric drive winding in each direct-drive spiral vane pump needs to be powered on. If each electric drive winding is connected to an external power source, it is necessary to lay an additional power line along the water supply pipeline. In order to reduce the work of laying the power line, the improvement of this embodiment is that: the power supply component includes a terminal 6 arranged on the pipe joint 5, the terminal 6 is electrically connected to the electric drive winding on the stator 1, and the terminal 6 at each stator end is set to match the terminal 6 on the adjacent stator. In this embodiment, each terminal is integrated on the pipe joint. As the two corresponding pipe joints on the two adjacent direct-drive spiral vane pumps are connected and connected, the terminals on the two pipe joints are electrically connected synchronously, thereby eliminating the operator's work of additionally connecting the terminals. Therefore, only one or a few electric drive windings need to be connected to an external power source in the entire water supply pipeline so that each electric drive winding in the entire water supply pipeline can obtain electrical energy. It should be understood that each direct-drive spiral vane pump is provided with a power socket for connecting an external power source, and the power socket is electrically connected to the electric drive winding, so that when laying the water supply pipeline, the external power source can arbitrarily select one of the power sockets on the direct-drive spiral vane pump for power supply. It should be understood that the various conventional circuit components added in the process of the external power source supplying power to the electric drive winding for the purpose of stable, safe and controllable power use are conventional improved designs, and are not necessary technical features of the present embodiment, so they are not described one by one in this technical solution.

[0046] Based on the improvement of the above embodiment: at least two wiring terminals 6 are provided on any pipe joint, and each wiring terminal is electrically connected to the electric drive winding through its corresponding wire. Specifically, two wiring terminals 6 are provided on the pipe joint. By setting two wiring terminals in parallel, when one of the wiring terminals fails, the circuit can be unblocked through the other wiring terminal, thereby avoiding the occurrence of a circuit breaker failure.

[0047] like Figure 1 and Figure 6 As shown, the direct-driven spiral blade pump in the above embodiment further includes at least one extension tube 7, both ends of the extension tube 7 are provided with water pipe joints 8 matching the pipe joint 5, and the water pipe joint 8 has a plug connector 9 matching the wiring terminal 6 on the pipe joint 5, the plug connectors 9 at both ends of the extension tube 7 are electrically connected through a built-in wire 10, and when the water pipe joint is connected to the pipe joint 5, the wiring terminal 6 is electrically connected to the plug connector 9. Thus, the length of the pipeline can be extended arbitrarily between two direct-driven spiral blade pumps through the extension tube, that is, multiple direct-driven spiral blade pumps and multiple extension tubes 7 are connected in series alternately in sequence to form the entire water supply pipeline, wherein the first direct-driven spiral blade pump or the extension tube 7 is connected to the water source, and the last direct-driven spiral blade pump or the extension tube 7 is connected to the water use unit.

[0048] In the above embodiment, the purpose of the pipe joint 5 and the water pipe joint 8 is to connect with the joint on the matching end of the pipeline and keep the pipeline sealed inside and outside the connection. To this end, the pipe joint 5 or water pipe joint 8 at both ends of the same pipeline can adopt matching male joints and female joints, thereby realizing the docking of the pipelines.

[0049] Based on the need for electricity consumption of the electric drive winding, preferably, the stator 1 is provided with a controller 11, the controller 11 is connected to the electric drive winding in communication, and the controller 11 is connected to the external control host in communication. Thus, the control host can send control instructions to each controller 11 through the information data obtained by each sensor on the entire water supply pipeline, and control the electric drive winding through each controller 11, so as to finally achieve the purpose of controlling the speed of the rotor 2.

[0050] The direct-drive spiral vane pump in the above embodiment has a compact structure and its motor drive part is integrated in the water supply pipeline. Therefore, the direct-drive spiral vane pump can be used in a wide range of scenarios. It can be pre-buried underground or inside other shelters as a fixed water pipe, or it can be used as a water supply pipeline for various temporary water use scenarios. In various temporary water use scenarios, such as fire water supply pipelines built by fire rescue vehicles, water pumping pipelines during flood discharge, etc., the direct-drive spiral vane pump in such temporary water use scenarios is generally directly connected in series to the water supply hose. At this time, the rotor in the direct-drive spiral vane pump will inevitably cause the direct-drive spiral vane pump to have a circumferential rotational torsional force during rotation. This torsional force causes the water supply hose to twist, thereby affecting the water supply. Especially in the initial stage of water supply, the torsion of the direct-drive spiral vane pump will precede the filling of the water flow in the water supply hose. To address this problem, the present embodiment is further improved in that: at least two rotors 2 are rotatably matched in the stator 1, and each rotor 2 is arranged in sequence along the axial direction, and electric drive windings are respectively provided at positions corresponding to each rotor 2 in the stator 1, and at least two rotors 2 in each rotor 2 rotate in opposite directions, and the spiral blades in any two rotors 2 with opposite rotation directions have opposite rotation directions. Specifically, as Figure 7As shown, two rotors 2 are arranged in the stator 1, and the two rotors are arranged in sequence along the axial direction, and a positioning bearing is arranged between the two rotors. Electric drive windings are respectively arranged at positions corresponding to the two rotors 2 on the stator 1. The two electric drive windings are used to drive the corresponding rotors 2 to rotate, and the two electric drive windings are arranged when one rotor 2 rotates forward and the other rotor 2 rotates reversely, thereby offsetting the torsional force generated by the rotation of the rotor 2 by the opposite rotation of the two rotors 2. In this embodiment, it is only necessary to make the circuit directions of the two electric drive windings opposite to generate opposite magnetic fields, so as to achieve the purpose of the opposite rotation direction of the rotor 2. This is a very conventional prior art in the field of motors. For this reason, the circuit connection relationship of the two electric drive windings in this embodiment will not be elaborated one by one.

[0051] In the above embodiment, two rotors 2 of the same structure are simultaneously arranged in a stator 1, and the two rotors 2 rotate in opposite directions at the same time, so that the two rotors can offset each other's torsional force generated by the rotation of the rotors while pumping water. However, since the two rotors 2 rotate in opposite directions, although the spiral blades in the two rotors 2 are designed with opposite rotation directions so that the axial flow direction of the fluid in the two rotors 2 is consistent, the rotation directions of the water flow in the two rotors are different. Therefore, vortices are easily generated at the junction of the two rotors 2, thereby reducing the axial pumping efficiency of the water flow. For this reason, the present embodiment is further improved in that: Figure 8 As shown, two rotors 2 are arranged in the stator 1, and a fixed block 12 is arranged between the two rotors 2. The fixed block 12 is fixedly connected to the stator 1. The fixed block 12 has an intermediate flow channel 13 that runs through both ends of the fixed block in the axial direction. The intermediate flow channel is spiral near both ends, and the intermediate flow channel 13 is composed of a left half flow channel and a right half flow channel. The left half flow channel and the right half flow channel meet in the fixed block 12 and are connected to each other. The spiral rotation direction of the left half flow channel is the same as the rotation direction of the spiral blades in the left rotor, and the spiral rotation direction of the right half flow channel is the same as the rotation direction of the spiral blades 3 in the right rotor 2. The junction between the left half flow channel and the right half flow channel is set to a smooth transition, so that the fluid flows from Figure 8 In the process of flowing to the right driven by the left spiral blade in the left rotor, since the rotation direction of the fluid is the same as that of the left half of the flow channel, the fluid can smoothly enter the left half of the flow channel, and the junction of the left half of the flow channel and the right half of the flow channel has a smooth transition, thereby reducing the energy loss of the fluid when entering the right half of the flow channel from the left half of the flow channel. Finally, the fluid flows out of the right half of the flow channel and enters the right rotor. Since the rotation direction of the spiral blade on the right is the same as that of the right half of the flow channel, the fluid can smoothly enter the right rotor from the right half of the flow channel. Finally, the vortex generated by the change in fluid rotation direction in the whole process is small, thereby minimizing the kinetic energy loss of fluid flow.

[0052] It should be understood that in the above embodiments, if multiple direct-drive spiral vane pumps are needed during the construction of a water supply pipeline, the multiple direct-drive spiral vane pumps can be connected in series or in parallel, that is, multiple direct-drive spiral vane pumps can be connected through various types of three-way or four-way connectors to form multiple parallel pipelines, which are very common connection methods in the existing pipeline construction process. Further, based on the preference of the above embodiments, an integrated structure can be adopted between the multi-way connector and the multiple direct-drive spiral vane pumps, that is, the multiple connectors of the multi-way connector and the corresponding direct-drive spiral vane pumps are an integrated structure.

[0053] In some usage scenarios, one or more of the direct-drive spiral vane pumps in the above-mentioned embodiments may be used, and the positive and negative orientation of the direct-drive spiral vane pump during the installation process directly determines the delivery direction of the internal spiral vane pumping water flow. For some non-emergency usage scenarios, the joints at both ends of the direct-drive spiral vane pump can be set to different ones to achieve fool-proof installation. However, this is bound to affect the installation efficiency of the installer, that is, the installer needs to determine whether the joints at both ends of the direct-drive spiral vane pump are correct. If they are reversed, the direction of the pipeline needs to be reversed to complete the docking. Especially for usage scenarios with strict time requirements, such as the process of connecting fire pipes at firefighting sites, if the direct-driven spiral vane pump of the above embodiment is used as one section of the fire pipe, then during the process of connecting and connecting the fire water pipe with the direct-driven spiral vane pump, if the firefighters still need to judge the direction of the joint, it will inevitably affect the firefighting. For this reason, based on the direct-driven spiral vane pump of the above embodiment, the present invention proposes a water pump control system, comprising a plurality of the above-mentioned direct-driven spiral vane pumps, each of which is connected in sequence along the axial direction to form a liquid supply pipeline, and each of the direct-driven spiral vane pumps is respectively connected to the control host for communication, and is characterized in that it also includes the following control steps: S1. The control host obtains the position information of the two ends of the stator in each direct-drive spiral vane pump, and controls the rotation direction of the spiral vanes in the direct-drive spiral vane pump based on the position information, so that the liquid flow direction in the entire liquid supply pipeline remains consistent; S2, obtaining flow rate and / or pressure information at multiple positions along the axial direction in the liquid supply pipeline, and allocating output power of each direct-drive spiral vane pump based on the pressure information; S3. When water needs to be stopped at any position in the liquid supply pipeline, the control host controls the spiral blades in one or more direct-driven spiral blade pumps upstream of the water-stopping position to reverse, and the control host adjusts the reverse speed of the spiral blades based on the flow velocity in the pipe at the water-stopping position so that the flow velocity in the pipe at the water-stopping position drops to zero.

[0054] Preferably, the position information of the two ends of the stator in the direct-drive spiral vane pump can be obtained by sensors at the two ends of the stator, that is, sensors are respectively provided at the two ends of the stator, and during the docking process, the sensors send the position information of the two ends of the stator to the control host, so that the control host can determine the position of the two ends of the stator in the entire liquid supply pipeline, that is, the position relationship between the upstream and downstream is separated, and finally the spiral vane is controlled to rotate forward or reverse. In this embodiment, whether the direct-drive spiral vane pump is installed forward or reverse in the entire liquid supply pipeline, the water flow driven by the spiral vane can be pressurized along the forward direction of the water flow in the pipe.

[0055] In S2 of this embodiment, the liquid supply pipeline can obtain the water flow rate information and / or water pressure information at each position in the pipe, so that the control host can better distribute the output power of each direct-driven spiral vane pump. The output power of the direct-driven spiral vane pump at the upstream end close to the water source position in the entire liquid supply pipeline is set to be larger, and the output power of the direct-driven spiral vane pump close to the downstream end is smaller. Finally, under the multi-stage pressurization of multiple direct-driven spiral vane pumps, each position of the entire liquid supply pipeline can maintain a relatively ideal water pressure.

[0056] In the normal use of the liquid supply pipeline, if the liquid supply pipeline needs to be intercepted due to water leakage, daily maintenance, replacement of pipelines, etc., the prior art generally needs to close the entire section of the liquid supply pipeline through a valve. In this embodiment, S3 can be used to reverse one or more direct-driven spiral vane pumps in the upstream pipeline that needs to be shut down. The reversal of the spiral blades in the direct-driven spiral vane pump makes the water flow remain stationary at this position, so that the operator can conveniently perform daily maintenance operations, and after the maintenance is completed, it is only necessary to reset the above-mentioned direct-driven spiral vane pump through the control host. In this embodiment, the operation of manually opening and closing the valve is omitted, so there is no need to set up an additional maintenance valve, and when a pipeline leak occurs, the control host can realize the timely shutdown of the leakage point position through remote control, thereby reducing the leakage of liquid. It should be understood that in the process of laying large-scale pipelines, more sensors will be used, and the water pressure and water flow information of the liquid in the pipe in the liquid supply pipeline can be obtained through the sensor. The installation of the above-mentioned sensor is conventional, which is not the focus of improvement of this embodiment, so it is not detailed in this embodiment.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0058] For those skilled in the art, various changes and modifications will undoubtedly be obvious after reading the above description. Therefore, the attached claims should be regarded as covering all changes and modifications of the true intent and scope of the present invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the present invention.

Claims

1. A direct-drive spiral vane pump, characterized in that: The invention comprises a stator (1), a rotor (2) rotatably engaged in the stator (1), an electric drive winding arranged on the stator (1) and used to drive the rotor (2) to rotate, and a spiral blade (3) arranged in the rotor (2), wherein the spiral blade (3) is connected to the rotor (2), and a power supply component for supplying electric energy to the electric drive winding is provided on the stator (1).

2. The direct-drive helical vane pump according to claim 1, characterized in that: The outer edge of the spiral blade (3) is fixedly connected to the inner side wall of the rotor (2).

3. The direct-drive helical vane pump according to claim 1, characterized in that: The spiral blade (3) has a central axis (3.1) extending along its central axis, and the central axis (3.1) is fixedly connected to the rotor (2) via a connecting rod (3.2).

4. The direct-drive helical vane pump according to claim 3, characterized in that: The outer edge of the spiral blade (3) is in contact with the inner wall of the rotor (2).

5. The direct-drive helical vane pump according to claim 3, characterized in that: A guide cone (3.3) is provided at the front end of the central axis (3.1).

6. A direct-drive helical vane pump according to any one of claims 1 to 5, characterized in that: Pipe joints (5) are respectively provided at both ends of the stator (1).

7. The direct-drive helical vane pump according to claim 6, characterized in that: A water pipe (4) in communication with the stator (1) is provided on at least one end of the stator (1), and a pipe joint (5) located on one side of the water pipe (4) is installed at the end of the water pipe (4) facing away from the stator (1).

8. The direct-drive helical vane pump according to claim 7, characterized in that: Water pipes (4) are provided on both ends of the stator (1).

9. The direct-drive helical vane pump according to claim 6, characterized in that: The power supply assembly comprises a connection terminal (6) arranged on a pipe joint (5), the connection terminal (6) being electrically connected to an electric drive winding on the stator (1), and the connection terminal (6) at the end of each stator (1) is arranged to match the connection terminal (6) on an adjacent stator.

10. The direct-drive helical vane pump according to claim 9, characterized in that: At least two wiring terminals (6) are provided on any pipe joint (5), and each wiring terminal (6) is electrically connected to the electric drive winding via a corresponding electric wire.

11. The direct-drive helical vane pump according to claim 9, characterized in that: The invention comprises at least one extension tube (7), wherein both ends of the extension tube (7) are provided with water pipe joints (8) matching the pipe joint (5), and the water pipe joint (8) is provided with a plug joint (9) matching the wiring terminal (6) on the pipe joint (5), the plug joints (9) at both ends of the extension tube (7) are electrically connected via a built-in wire (10), and when the water pipe joint (8) is connected to the pipe joint (5), the wiring terminal (6) is electrically connected to the plug joint (9).

12. The direct-drive helical vane pump according to claim 1, characterized in that: At least two rotors (2) are rotatably coupled in the stator (1), the rotors (2) are arranged in sequence along the axial direction, and electric drive windings are respectively provided at positions corresponding to the rotors (2) in the stator (1), at least two rotors (2) in the rotors (2) rotate in opposite directions, and the spiral blades in any two rotors (2) that rotate in opposite directions rotate in opposite directions.

13. The direct-drive helical vane pump according to claim 12, characterized in that: Two rotors (2) are arranged in the stator (1), a fixed block (12) is arranged between the two rotors (2), and an intermediate flow channel (13) is arranged in the fixed block (12) and axially penetrates through both ends of the fixed block (12). The intermediate flow channel (13) is spiral-shaped near the two ends, and the rotation direction of the spiral channel at the end of the intermediate flow channel (13) is the same as the rotation direction of the spiral blade (3) in the corresponding rotor (2).

14. A water pump control system, comprising a plurality of direct-drive helical vane pumps according to claim 1, wherein the direct-drive helical vane pumps are sequentially connected in the axial direction to form a liquid supply pipeline, and the direct-drive helical vane pumps are respectively connected to a control host for communication, characterized in that: The following control steps are also included: S1. The control host obtains the position information of the two ends of the stator in each direct-drive spiral vane pump, and controls the rotation direction of the spiral vanes in the direct-drive spiral vane pump based on the position information, so that the liquid flow direction in the entire liquid supply pipeline remains consistent; S2, obtaining flow rate and / or pressure information at multiple positions along the axial direction in the liquid supply pipeline, and allocating output power of each direct-drive spiral vane pump based on the pressure information; S3. When water needs to be stopped at any position in the liquid supply pipeline, the control host controls the spiral blades in one or more direct-driven spiral blade pumps upstream of the water-stopping position to reverse, and the control host adjusts the reverse speed of the spiral blades based on the flow velocity in the pipe at the water-stopping position so that the flow velocity in the pipe at the water-stopping position drops to zero.

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