A water pump flow rate control device and control method

Abstract

The present invention discloses a water pump flow rate control device and control method, belonging to the technical field of water pumps. The water pump flow rate control device comprises a main control component connected to the water outlet at the front end of the pump body and a tee connected to the water inlet at one side of the pump body. The center of the main control component is rotatably connected to a flow rate regulating component, and an operating component for driving the flow rate regulating component to rotate is installed at the top center of the main control component; a circulating pressure valve is fixedly installed at the bottom center of the main control component, and a circulating pipeline is connected to the bottom end of the circulating pressure valve; a circulating check valve and a check valve plate are installed in the other two ports of the tee, respectively. The present invention can quickly realize the regulation and control of the water pump flow rate by designing the flow rate regulating component, the circulating pressure valve, the circulating pipeline and the circulating check valve, and its simple structural design is also convenient for operation and use.

Description

Technical Field

[0001] The invention belongs to the technical field of water pumps, and in particular relates to a water pump flow rate control device and a control method. Background Art

[0002] A water pump is a mechanical device used to transport liquid (usually water) from one place to another. It converts energy into fluid kinetic energy through mechanical action, thereby generating pressure and driving the flow of liquid. Water pumps are commonly used in various industrial, agricultural, construction and civil applications. The choice of water pump depends on the specific application requirements, including the conveying distance, liquid type, flow rate and pressure requirements. In the industrial and construction fields, water pumps are one of the key equipment, which directly affects the production efficiency and the operation effect of facilities.

[0003] Water pump flow rate control devices are usually used to adjust the output flow or flow rate of water pumps to meet specific industrial, agricultural or civil water treatment needs. The commonly used flow rate control methods on the market include speed regulator control, frequency converter control, pressure regulation control and electronic throttle valve control. The most widely used control device on the market is frequency converter control. Frequency converter control is to use a variable frequency motor to drive the water pump. Its structure is not only simple, but also very convenient to operate and control. However, while it is easy to use, it also has major defects. The price of a variable frequency motor is several times that of an ordinary motor. It is usually more suitable for some medium and large enterprises, and is generally used when the flow control accuracy is high or the installation space is limited. When using ordinary speed regulator control, due to its complex mechanical structure, daily maintenance is difficult. When using pressure regulation control or electronic valve control, it is easy to cause damage to the water pump impeller due to the inability to better adjust the water flow pressure in the pipeline. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a water pump flow rate control device and a control method.

[0005] The technical solution adopted to solve the above technical problems is: a water pump flow rate control device, comprising a main control component connected to the water outlet at the front end of the pump body and a tee connected to the water inlet at one side of the pump body, the center of the main control component is rotatably connected to a flow rate regulating component, and the top center of the main control component is equipped with an operating component for driving the flow rate regulating component to rotate;

[0006] A circulating pressure valve is fixedly installed at the bottom center of the main control component, and a circulating pipeline is connected to the bottom end of the circulating pressure valve;

[0007] A circulation check valve and a check valve plate are installed in the other two ports of the tee respectively, and one end of the circulation pipeline away from the circulation pressure valve is connected to the port of the tee where the circulation check valve is installed.

[0008] Furthermore, the main control component includes a main shell, a sealing cover is fixedly installed on the top of the main shell, a water inlet interface is provided at the rear end of the main shell, the water inlet interface is connected to the water outlet at the front end of the pump body, a drainage interface is provided at the front end of the main shell, and a positioning groove is opened at the center of the bottom inner surface of the main shell.

[0009] Through the above technical solution, the main control component serves as the main structure, and is mainly used for the installation and fixation of the flow rate regulating component and the circulating pressure valve. At the same time, the water flow drawn into the pump body will enter the water inlet interface through its water outlet, and then enter the inside of the main shell, and then enter the drain interface through the flow regulating hole on the flow rate regulating component, and finally be discharged outward; in addition, since the main shell and the sealing cover are fixed by multiple screws, the sealing cover is easier to disassemble and assemble, thereby making it more convenient to install and disassemble the flow rate regulating component, and also convenient for daily inspection and maintenance.

[0010] Furthermore, the flow rate regulating assembly includes a rotary regulator rotatably connected to the main shell, the front end of the rotary regulator is provided with a plurality of flow regulating holes of different apertures, the rear end of the rotary regulator is provided with a water inlet hole, the bottom center of the rotary regulator is provided with an annular protrusion, and the top center of the rotary regulator is provided with a polygonal socket.

[0011] Through the above technical solution, the flow rate regulating component is one of the core components of the adjustment control device, which mainly plays the role of regulating and controlling the water flow rate and flow rate. The rotary regulator is cylindrical as a whole, with a hollow structure inside, and a plurality of flow regulating holes with different apertures are opened at the front end, and a large-sized water inlet hole is opened at the rear end. When in use, the flow regulating holes of different sizes can be controlled to remain connected with the drainage interface through the operating component. When the aperture on the flow regulating hole is consistent with the inner diameter of the drainage interface, the water flow drawn into the pump body will be discharged normally through the drainage interface at the front end of the main control component. At this time, the water The flow pressure is constant; when the aperture of the flow regulating hole becomes smaller step by step through adjustment, the water output will be less than the water intake during pumping, and the water pressure inside the main control component will increase. The water flow with increased pressure will automatically push down the main valve core, so that part of the water flows into the circulation pipeline through the circulation pressure valve. At this time, the water pressure in the main control component can also be stabilized; further, since an annular protrusion is provided at the bottom center of the rotary regulator, and the rotary regulator is connected with the bottom of the main shell and the circulation pressure valve, the excess water in the rotary regulator can smoothly enter the circulation pressure valve and be discharged outward.

[0012] Furthermore, a chamber for installing a rotary regulator is opened at the center of the top of the main shell, and the annular protrusion is rotatably connected to the positioning groove.

[0013] Through the above technical solution, the rotary regulator can achieve stable rotation adjustment.

[0014] Furthermore, the operating component includes a rotating shaft passing through the sealing cover, a polygonal plug rod is provided at the bottom center of the rotating shaft, the polygonal plug rod is inserted into the polygonal plug hole, a threaded rod is fixedly connected to the bottom center of the polygonal plug rod, a fixing nut for locking the rotating adjuster is threadedly connected to the threaded rod, and an operating wrench is fixedly connected to the top end of the rotating shaft.

[0015] Through the above technical scheme, the operating component is mainly used for the rotation adjustment and control of the flow rate regulating component. During specific operation, the rotating shaft and the rotary regulator can be driven to rotate synchronously by rotating the operating wrench, so as to achieve the purpose of flow rate regulation and control by using the rotary regulator; further, by adopting a polygonal plug rod and a polygonal socket, the rotating shaft can drive the rotary regulator to rotate synchronously.

[0016] Furthermore, the circulating pressure valve includes a main valve body fixed at the bottom center of the main control component, the inner side of the main valve body is provided with an upper valve hole and a lower valve hole in sequence from top to bottom, the bottom of the lower valve hole is threadedly connected to a bottom valve seat, the peripheral side of the bottom valve seat is provided with a plurality of evenly distributed bottom through holes, a valve stem passes through the center of the bottom valve seat, the outer wall of the valve stem is sleeved with a first return spring, the top of the valve stem is fixedly connected to the main valve core, the peripheral side of the main valve core is provided with a plurality of guide holes, and the top of the main valve core is also provided with a guide sleeve.

[0017] Through the above technical scheme, the circulating pressure valve is mainly used for pressure relief and circulation control of excess water flow in the main control component. Specifically, when the water output is less than the water intake during pumping, the water pressure inside the main control component will increase. The water flow with increased pressure will force the main valve core to move downward and squeeze the first return spring. When the bottom ends of the multiple guide holes on the main valve core are connected with the lower valve hole, the water flow in the main control component will flow into the lower valve hole through the multiple guide holes, and then flow into the circulation pipe through the multiple bottom through holes, thereby realizing the pressure relief and circulation drainage effect of the water flow; further, by arranging a guide sleeve above the main valve core, the main valve core can be prevented from separating from the upper valve hole during the downward movement. In addition, while ensuring the overall strength of the upper valve hole, its mass is also reduced.

[0018] Furthermore, the main valve core and the guide sleeve are slidingly limited in the upper valve hole, and when the main valve core moves downward under pressure, the multiple guide holes are connected with the lower valve hole.

[0019] Furthermore, the circulation one-way valve includes a limit ring fixed in one of the ports of the tee and a limit seat threadedly connected to the port, a fixed seat is installed on one side of the limit ring, a plurality of evenly distributed circulation through holes are opened on the circumference of the fixed seat, a conical valve core is slidably connected to the outer wall of the fixed seat, and a second return spring is installed between the fixed seat and the conical valve core.

[0020] Through the above technical scheme, the circulation check valve is mainly used for the connection control between the tee and the circulation pipeline, and the water flow in the circulation pipeline can only flow into the tee, and the water flow in the tee cannot flow into the circulation pipeline. In specific operation, when a large amount of water flows into the circulation pipeline, under the action of the water flow pressure, the water flow will squeeze the conical valve core and the second return spring, so that the extruded conical valve core is separated from the limit seat. At this time, the water flow will flow in through the middle of the limit seat, and then flow into the tee through the multiple circulation through holes on the fixed seat, and finally flow back to the pump body to achieve the water circulation effect; further, since the two ends of the circulation pipeline are sealed by the circulation check valve and the circulation pressure valve respectively, the water storage function can be realized in the circulation pipeline, and with the one-way valve plate in the other port, when the water pump is frequently opened and closed in a short period of time or continues to be used after a short period of shutdown, the probability of air entering the water pump can be greatly reduced, thereby avoiding the frequent water hammer effect, and then achieving the protection of the water pump impeller.

[0021] Furthermore, a sealing ring matching the conical valve core is installed on the inner side of the limit seat.

[0022] Through the above technical solution, by providing a sealing ring, the inclined surface of the conical valve core can be matched, so that a better sealing effect can be achieved.

[0023] A control method for a water pump flow rate control device comprises the following specific steps:

[0024] Step 1: Connect the water inlet interface of the main control component to the water outlet at the front end of the pump body, and connect one end of the tee to the water inlet on one side of the pump body. Then use the circulation pipe to connect the main control component and the tee, and connect the last port of the tee to the pumping pipe;

[0025] Step 2: After the pump body is started, water will be pumped through the pump pipe under the negative pressure suction of the pump body, and the pumped water will enter the pump body through the tee, then enter the main control component through the water outlet, and then be discharged outward through the front drainage interface;

[0026] Step 3: When the working frequency of the pump body driving motor remains unchanged and the water output and flow rate need to be adjusted, the operator rotates the operating wrench to drive the rotary regulator to rotate synchronously. The rotary regulator is provided with a plurality of flow regulating holes of different apertures. When the flow regulating holes of different apertures are connected to the drainage interface, the water output and flow rate can be adjusted.

[0027] Step 4: When the water inlet and outlet are balanced, the water flow drawn into the pump body will be discharged normally through the drainage interface at the front end of the main control component; when the aperture of the flow regulating hole becomes smaller step by step after adjustment, the water output will be less than the pumped water volume. At this time, the water pressure inside the main control component increases, and the water flow with increased pressure will automatically push down to open the main valve core, so that part of the water flows into the circulation pipeline through the circulation pressure valve, and then enters the three-way through the circulation check valve. Finally, the water flow will be re-sucked into the pump body to realize the circulation pumping of the water flow;

[0028] Step 5: When the circulating water in the circulating pipe flows through the tee and enters the pump body again, the water inlet into the suction pipe will decrease and remain in a stable state.

[0029] The beneficial effects of the present invention are as follows: (1) The present invention can quickly realize the regulation and control of the flow rate of the water pump by designing the flow rate regulating component, the circulation pressure valve, the circulation pipeline and the circulation check valve, and its simple structural design is also convenient for operation and use; (2) The present invention can design the flow rate regulating component and the circulation pressure valve so that the pressurized water flow in the main control component will flow into the lower valve hole through multiple guide holes, and then flow into the circulation pipeline through multiple bottom through holes, thereby realizing the pressure relief and circulation drainage of the water flow, thereby effectively avoiding malfunctions caused by excessive pressure inside the pump body; (3) The present invention can effectively prevent malfunctions caused by excessive pressure inside the pump body; The invention provides a circulation check valve and a circulation pressure valve at both ends of the circulation pipe, so that the circulation pipe can realize the water storage function. In combination with the check valve plate in the other port, when the water pump is frequently opened and closed in a short period of time or is continuously used after being shut down for a short period of time, the probability of air entering the water pump can be greatly reduced, thereby avoiding the frequent occurrence of water hammer effect, and further protecting the water pump impeller; (4) The invention adopts a simple control device to quickly adjust and control the flow rate of the water pump when the water pump power remains unchanged, which not only reduces the use cost, but also facilitates daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a first-view structural diagram of the working state of the present invention;

[0031] Figure 2 It is a second perspective structural diagram of the working state of the present invention;

[0032] Figure 3 It is a front view of the working state of the present invention;

[0033] Figure 4 It is a top view of the working state of the present invention;

[0034] Figure 5 It is a schematic structural diagram of the flow rate control device of the present invention from a first perspective;

[0035] Figure 6 is a schematic structural diagram of the flow rate control device of the present invention from a second viewing angle;

[0036] Figure 7 This is a first-view structural diagram of the main control component of the present invention;

[0037] Figure 8 is a second perspective structural diagram of the main control component of the present invention;

[0038] Fig. 9 This is a structural diagram of the flow rate regulating assembly of the present invention from a first perspective;

[0039] Fig.10 is a structural diagram of the flow rate regulating assembly of the present invention from a second viewing angle;

[0040] Fig.11 It is a right side view of the main control assembly of the present invention;

[0041] Fig.12 yes Fig.11 Middle AA section view;

[0042] Fig.13 yes Fig.12 A partial enlarged view of the middle A;

[0043] Fig.14 yes Fig.12 A partial enlarged view of point B in the middle;

[0044] Fig.15 It is a structural schematic diagram of the tee of the present invention;

[0045] Fig.16 It is a cross-sectional view of the tee of the present invention.

[0046] Reference numerals: 1. Main control assembly; 101. Main housing; 102. Sealing cover; 103. Water inlet interface; 104. Drain interface; 105. Positioning groove; 2. Flow rate adjustment assembly; 201. Rotary regulator; 202. Flow rate adjustment hole; 203. Water inlet hole; 204. Annular protrusion; 205. Polygonal plug hole; 3. Operating assembly; 301. Rotating shaft; 302. Polygonal plug rod; 303. Threaded rod; 304. Fixing nut; 305. Operating wrench; 4. Circulation pressure valve; 401 , main valve body; 402, upper valve hole; 403, lower valve hole; 404, bottom valve seat; 405, bottom through hole; 406, valve stem; 407, first return spring; 408, main valve core; 409, guide hole; 410, guide sleeve; 5, circulation pipeline; 6, three-way; 7, circulation check valve; 701, limit ring; 702, limit seat; 703, fixed seat; 704, circulation through hole; 705, conical valve core; 706, second return spring; 707, sealing ring; 8, check valve plate; 9, pump body. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] like Figure 1-Figure 3 As shown, a water pump flow rate control device of this embodiment includes a main control component 1 connected to the water outlet at the front end of the pump body 9 and a tee 6 connected to the water inlet at one side of the pump body 9.

[0049] like Figure 7-Figure 8 As shown, the main control component 1 includes a main shell 101, a sealing cover 102 is fixedly installed on the top of the main shell 101, a water inlet interface 103 is provided at the rear end of the main shell 101, the water inlet interface 103 is connected to the water outlet at the front end of the pump body 9, a drainage interface 104 is provided at the front end of the main shell 101, and a positioning groove 105 is opened at the center of the bottom inner surface of the main shell 101. The main control component 1 serves as a main structure and is mainly used for the installation and fixation of the flow rate regulating component 2 and the circulating pressure valve 4. At the same time, the water flow drawn into the pump body 9 will enter the water inlet interface 103 through its water outlet, and then enter the inside of the main shell 101, and then enter the drainage interface 104 through the flow regulating hole 202 on the flow rate regulating component 2, and finally be discharged outward; in addition, since the main shell 101 and the sealing cover 102 are fixed by multiple screws, the sealing cover 102 is easier to disassemble and assemble, thereby making it easier to install and disassemble the flow rate regulating component 2, and also easier to do daily inspection and maintenance.

[0050] like Figure 9-Figure 14As shown, the center of the main control component 1 is rotatably connected to the flow rate regulating component 2, and the flow rate regulating component 2 includes a rotary regulator 201 rotatably connected to the main shell 101, and the front end of the rotary regulator 201 is provided with a plurality of flow regulating holes 202 with different apertures, and the rear end of the rotary regulator 201 is provided with a water inlet hole 203. The center of the bottom of the rotary regulator 201 is provided with an annular protrusion 204, and the center of the top of the rotary regulator 201 is provided with a polygonal jack 205. The flow rate regulating component 2 is one of the core components of the adjustment control device, and it mainly plays the role of regulating and controlling the water flow and flow rate. The rotary regulator 201 is cylindrical as a whole, and the interior is a hollow structure, and the front end is provided with a plurality of flow regulating holes 202 with different apertures, and the rear end is provided with a A large-sized water inlet hole 203 is provided. When in use, the flow regulating holes 202 of different sizes can be controlled to remain connected with the drainage interface 104 through the operating component 3. When the aperture on the flow regulating hole 202 is consistent with the inner diameter of the drainage interface 104, the water flow drawn in by the pump body 9 will be discharged normally outward through the drainage interface 104 at the front end of the main control component 1, and the water flow pressure is constant at this time; when the aperture of the flow regulating hole 202 becomes smaller step by step through adjustment, since the water output will be less than the water intake during pumping, the water pressure inside the main control component 1 will increase at this time, and the water flow after the pressure increase will automatically push down the main valve core 408, so that part of the water flows through the circulating pressure valve 4 into the circulating pipe 5. At this time, the water pressure stability in the main control component 1 can also be achieved.

[0051] Furthermore, in this embodiment, since an annular protrusion 204 is provided at the bottom center of the rotary regulator 201, and the rotary regulator 201 and the bottom of the main shell 101 are connected with the circulating pressure valve 4, the excess water flow in the rotary regulator 201 can smoothly enter the circulating pressure valve 4 and be discharged outward.

[0052] Furthermore, in this embodiment, a chamber for installing the rotary adjuster 201 is opened at the center of the top of the main housing 101, and the annular protrusion 204 is rotatably connected to the positioning groove 105, so that the rotary adjuster 201 can achieve stable rotation adjustment.

[0053] like Figure 8-Figure 13As shown, an operating component 3 for driving the flow rate regulating component 2 to rotate is installed at the top center of the main control component 1; the operating component 3 includes a rotating shaft 301 passing through the sealing cover 102, and a polygonal plug rod 302 is provided at the bottom center of the rotating shaft 301, and the polygonal plug rod 302 is inserted into the polygonal plug hole 205, and a threaded rod 303 is fixedly connected to the bottom center of the polygonal plug rod 302, and a fixing nut 304 for locking the rotary regulator 201 is threadedly connected to the threaded rod 303, and an operating wrench 305 is fixedly connected to the top of the rotating shaft 301. The operating component 3 is mainly used for rotation adjustment and control of the flow rate regulating component 2. During specific operation, the operating wrench 305 can be rotated to drive the rotating shaft 301 and the rotary regulator 201 to rotate synchronously, so as to utilize the rotary regulator 201 to achieve the purpose of flow rate adjustment and control.

[0054] In this embodiment, the polygonal plug rod 302 cooperates with the polygonal plug hole 205 so that the rotating shaft 301 can drive the rotating regulator 201 to rotate synchronously.

[0055] like Figure 7-Figure 14 As shown, a circulating pressure valve 4 is fixedly installed at the bottom center of the main control component 1, and a circulating pipe 5 is connected to the bottom end of the circulating pressure valve 4; the circulating pressure valve 4 comprises a main valve body 401 fixed at the bottom center of the main control component 1, an upper valve hole 402 and a lower valve hole 403 are sequentially opened on the inner side of the main valve body 401 from top to bottom, a bottom valve seat 404 is threadedly connected to the bottom of the lower valve hole 403, a plurality of evenly distributed bottom through holes 405 are opened on the peripheral side of the bottom valve seat 404, a valve stem 406 passes through the center of the bottom valve seat 404, a first return spring 407 is sleeved on the outer wall of the valve stem 406, a main valve core 408 is fixedly connected to the top end of the valve stem 406, and a plurality of bottom through holes 405 are opened on the peripheral side of the main valve core 408. The guide hole 409 and the top of the main valve core 408 are also provided with a guide sleeve 410. The circulating pressure valve 4 is mainly used for pressure relief and circulation control of excess water flow in the main control component 1. Specifically, when the water output is less than the water intake during pumping, the water pressure inside the main control component 1 will increase. The water flow with increased pressure will force the main valve core 408 to move downward and squeeze the first return spring 407. When the bottom ends of the multiple guide holes 409 on the main valve core 408 are connected with the lower valve hole 403, the water flow in the main control component 1 will flow into the lower valve hole 403 through the multiple guide holes 409, and then flow into the circulation pipe 5 through the multiple bottom through holes 405, thereby realizing the pressure relief and circulation drainage of the water flow.

[0056] In this embodiment, the main valve core 408 and the guide sleeve 410 are further limited in sliding in the upper valve hole 402. When the main valve core 408 moves downward under pressure, the multiple guide holes 409 are connected with the lower valve hole 403. By arranging the guide sleeve 410 above the main valve core 408, the main valve core 408 can be prevented from being separated from the upper valve hole 402 during the downward movement. In addition, while ensuring the overall strength of the upper valve hole 402, its mass is also reduced.

[0057] like Figure 15-16 As shown, the other two ports of the tee 6 are respectively installed with a circulation check valve 7 and a check valve plate 8, and the end of the circulation pipe 5 away from the circulation pressure valve 4 is connected to the port of the tee 6 where the circulation check valve 7 is installed.

[0058] like Fig.16 As shown, the circulation check valve 7 includes a limit ring 701 fixed in one of the ports of the tee 6 and a limit seat 702 threadedly connected to the port, a fixed seat 703 is installed on one side of the limit ring 701, and a plurality of evenly distributed circulation through holes 704 are opened on the circumference of the fixed seat 703, a conical valve core 705 is slidably connected to the outer wall of the fixed seat 703, and a second reset spring 706 is installed between the fixed seat 703 and the conical valve core 705. The circulation check valve 7 is mainly used for controlling the connection between the tee 6 and the circulation pipeline 5, and the water flow in the circulation pipeline 5 can only flow into the tee 6, and the water flow in the tee 6 cannot flow into the circulation pipeline 5. In specific operation, when a large amount of water flows into the circulation pipeline 5, under the action of the water flow pressure, the water flow The conical valve core 705 and the second return spring 706 will be squeezed, so that the squeezed conical valve core 705 is separated from the limit seat 702. At this time, the water flow will flow in through the middle of the limit seat 702, and then flow into the tee 6 through the multiple circulation holes 704 on the fixed seat 703, and finally flow back to the pump body 9 to achieve the water circulation effect; further, since the two ends of the circulation pipe 5 are sealed by the circulation check valve 7 and the circulation pressure valve 4 respectively, the water storage function can be realized in the circulation pipe 5, and the one-way valve plate 8 in the other port is used. When the water pump is frequently started and closed in a short period of time or continues to be used after a short shutdown, the probability of air entering the water pump can be greatly reduced, thereby avoiding the frequent water hammer effect, and then the protection of the water pump impeller can be achieved.

[0059] In this embodiment, a sealing ring 707 that matches the conical valve core 705 is further installed on the inner side of the limit seat 702. By providing the sealing ring 707, the inclined surface of the conical valve core 705 can be matched, thereby achieving a better sealing effect.

[0060] A control method for a water pump flow rate control device comprises the following specific steps:

[0061] Step 1: Connect the water inlet interface 103 of the main control component 1 to the water outlet at the front end of the pump body 9, and connect one end of the tee 6 to the water inlet on one side of the pump body 9, and then use the circulation pipe 5 to connect the main control component 1 and the tee 6, and connect the last port of the tee 6 to the water pumping pipe;

[0062] Step 2: After the pump body 9 is started, water will be pumped through the pump pipe under the negative pressure suction of the pump body, and the pumped water will enter the pump body 9 through the tee 6, then enter the main control component 1 through the water outlet, and then be discharged outward through the front drainage interface 104;

[0063] Step 3: When the working frequency of the driving motor of the pump body 9 remains unchanged and the water output and the water flow rate need to be adjusted, the operator rotates the operating wrench 305 to drive the rotary regulator 201 to rotate synchronously. The rotary regulator 201 is provided with a plurality of flow regulating holes 202 with different apertures. When the flow regulating holes 202 with different apertures are connected to the drainage interface 104, the water output and the flow rate can be adjusted.

[0064] Step 4: When the water inlet and outlet are balanced, the water flow drawn in by the pump body 9 will be normally discharged outward through the drainage interface 104 at the front end of the main control component 1; when the aperture of the flow regulating hole 202 is gradually reduced after adjustment, the water outlet will be less than the pumped water volume, at this time, the water pressure inside the main control component 1 increases, and the water flow with increased pressure will automatically push down the main valve core 408, so that part of the water flows through the circulation pressure valve 4 into the circulation pipeline 5, and then enters the three-way 6 through the circulation check valve 7, and finally the water flow will be re-sucked into the pump body 9 to realize the circulation pumping of the water flow;

[0065] Step 5: When the circulating water in the circulating pipe 5 flows through the tee 6 and enters the pump body 9 again, the water inflow of the pumping pipe will decrease and remain in a stable state.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A water pump flow rate control device, comprising a main control component (1) connected to a front water outlet of a pump body (9) and a tee (6) connected to a water inlet on one side of the pump body (9), characterized in that: The main control assembly (1) comprises a main housing (101), a sealing cover (102) is fixedly mounted on the top of the main housing (101), a water inlet interface (103) is provided at the rear end of the main housing (101), the water inlet interface (103) is connected to the front end water outlet of the pump body (9), a drainage interface (104) is provided at the front end of the main housing (101), and a positioning groove (105) is provided at the center of the inner surface of the bottom of the main housing (101); The center of the main control component (1) is rotatably connected to a flow rate regulating component (2), the flow rate regulating component (2) comprising a rotary regulator (201) rotatably connected to the main housing (101), a front end of the rotary regulator (201) is provided with a plurality of flow regulating holes (202) of different apertures, a rear end of the rotary regulator (201) is provided with a water inlet hole (203), a bottom center of the rotary regulator (201) is provided with an annular protrusion (204), and a top center of the rotary regulator (201) is provided with a polygonal plug hole (205); An operating component (3) for driving the flow rate regulating component (2) to rotate is installed at the top center of the main control component (1); A circulating pressure valve (4) is fixedly installed at the bottom center of the main control component (1), and the circulating pressure valve (4) comprises a main valve body (401) fixed at the bottom center of the main control component (1), an upper valve hole (402) and a lower valve hole (403) are sequentially provided on the inner side of the main valve body (401) from top to bottom, a bottom valve seat (404) is threadedly connected to the bottom of the lower valve hole (403), a plurality of evenly distributed bottom through holes (405) are provided on the peripheral side of the bottom valve seat (404), a valve stem (406) passes through the center of the bottom valve seat (404), a first return spring (407) is sleeved on the outer wall of the valve stem (406), a main valve core (408) is fixedly connected to the top of the valve stem (406), a plurality of guide holes (409) are provided on the peripheral side of the main valve core (408), and a guide sleeve (410) is also provided on the top of the main valve core (408); The bottom end of the circulating pressure valve (4) is connected to a circulating pipeline (5); A circulation check valve (7) and a check valve plate (8) are respectively installed in the other two ports of the tee (6), and one end of the circulation pipeline (5) away from the circulation pressure valve (4) is connected to the port of the tee (6) on which the circulation check valve (7) is installed.

2. The water pump flow rate control device according to claim 1, characterized in that: A chamber for installing a rotary regulator (201) is provided at the top center of the main housing (101), and the annular protrusion (204) is rotatably connected to the positioning groove (105).

3. The water pump flow rate control device according to claim 1, characterized in that: The operating assembly (3) comprises a rotating shaft (301) penetrating the sealing cover (102); a polygonal plug rod (302) is provided at the bottom center of the rotating shaft (301); the polygonal plug rod (302) is plugged into the polygonal plug hole (205); a threaded rod (303) is fixedly connected to the bottom center of the polygonal plug rod (302); a fixing nut (304) for locking the rotating regulator (201) is threadedly connected to the threaded rod (303); and an operating wrench (305) is fixedly connected to the top end of the rotating shaft (301).

4. The water pump flow rate control device according to claim 1, characterized in that: The main valve core (408) and the guide sleeve (410) are slidably limited in the upper valve hole (402), and when the main valve core (408) moves downward under pressure, the plurality of guide holes (409) are connected to the lower valve hole (403).

5. The water pump flow rate control device according to claim 1, characterized in that: The circulation check valve (7) comprises a limit ring (701) fixed in one of the ports of the three-way valve (6) and a limit seat (702) threadedly connected to the port, a fixed seat (703) is installed on one side of the limit ring (701), a plurality of evenly distributed circulation through holes (704) are opened on the circumference of the fixed seat (703), a conical valve core (705) is slidably connected to the outer wall of the fixed seat (703), and a second return spring (706) is installed between the fixed seat (703) and the conical valve core (705).

6. The water pump flow rate control device according to claim 5, characterized in that: A sealing ring (707) matching with the conical valve core (705) is also installed on the inner side of the limit seat (702).

7. The control method of the water pump flow rate control device according to any one of claims 1 to 6, characterized in that: The specific steps include: Step 1: Connect the water inlet interface (103) of the main control component (1) to the front water outlet of the pump body (9), and simultaneously connect one end of the tee (6) to the water inlet on one side of the pump body (9), and then use the circulation pipe (5) to connect the main control component (1) and the tee (6), and connect the last port of the tee (6) to the water pumping pipe; Step 2: After the pump body (9) is started, water is pumped through the pump pipe under the negative pressure suction of the pump body, and the pumped water flows into the pump body (9) through the tee (6), then enters the main control component (1) through the water outlet, and then is discharged to the outside through the front drainage interface (104); Step 3: When the operating frequency of the driving motor of the pump body (9) remains unchanged and it is necessary to adjust the water output and the water output flow rate, the operator rotates the operating wrench (305) to drive the rotary regulator (201) to rotate synchronously. The rotary regulator (201) is provided with a plurality of flow regulating holes (202) of different apertures. When the flow regulating holes (202) of different apertures are connected to the drainage interface (104), the water output and the flow rate can be adjusted. Step 4: When the water inflow and the water outflow are balanced, the water flow drawn into the pump body (9) will be normally discharged outward through the drainage interface (104) at the front end of the main control component (1); when the aperture of the flow regulating hole (202) is gradually reduced after adjustment, the water outflow will be less than the pumped water volume, at which time the water pressure inside the main control component (1) increases, and the water flow with increased pressure will automatically push the main valve core (408) downward, so that part of the water flows through the circulation pressure valve (4) into the circulation pipeline (5), and then enters the three-way valve (6) through the circulation check valve (7), and finally the water flow will be re-sucked into the pump body (9) to realize the circulation pumping of the water flow; Step 5: When the circulating water in the circulating pipe (5) flows through the tee (6) and enters the pump body (9) again, the water inflow into the pump pipe will decrease and remain in a stable state.

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