Small submersible pump capable of backwashing regularly

Abstract

The invention relates to the field of unit operation, and discloses a small submersible pump capable of backwashing regularly, which comprises a shell, an induction motor mechanism, an impeller mechanism, an anti-backflow mechanism, a backwashing pollution discharge mechanism, a switch mechanism and a control module, the shell is divided into an inner shell and an outer shell, and the inner shell and the outer shell are both hollow; the induction motor mechanism is fixedly connected to the inner shell, the impeller mechanism is fixedly connected to the interior of the shell and is connected with the induction motor through a rotating shaft, the backflow prevention mechanism is installed in the shell and is installed on one side of the submersible pump, and the backwashing sewage discharging mechanism is fixedly connected to the interior of the shell. The switch mechanism is fixedly connected to the interior and the exterior of the shell, the control module is fixedly connected to one side of the shell, the control module receives numerical values of the flow detection sensor and sets timing washing time during work, backwashing is conducted on the submersible pump, and a filter screen of the submersible pump is effectively prevented from being blocked by dirt. The service life and the working efficiency of the submersible pump and components thereof are prolonged.

Description

Technical Field

[0001] The invention relates to the field of unit operation, in particular to a small submersible pump capable of timed backwashing. Background Art

[0002] Submersible pump is an important equipment for deep well water extraction. It drives the impeller to rotate through the motor and uses centrifugal force to lift the liquid from the bottom of the well or the water source to the surface. It combines the functions of the motor and the water pump to form an integrated water extraction machine, which is widely used in many fields such as domestic water, farmland irrigation, and industrial cooling.

[0003] The existing small submersible pump will have its water inlet filter blocked by solid dirt such as mud and sand after long-term operation, which will prevent water from flowing normally or only in small quantities, reducing work efficiency. Long-term blockage will also affect the pump body itself, reducing the service life of pump components. Cleaning the dirt in the pump body will increase the workload, increase costs, and increase resource consumption and environmental pollution. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a small submersible pump that can be backwashed at a scheduled time, which has the advantages of backwashing dirt at a scheduled time, real-time detection of the flow rate of the pump body when it is working and timely flushing, and flushing using the submersible pump's own power without the need for additional energy, thereby solving the problems in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small submersible pump capable of timed backwashing, comprising a housing, an induction motor mechanism, an impeller mechanism, a backflow prevention mechanism, a backwashing and sewage discharge mechanism, a switch mechanism, a control module and a flow detection sensor, wherein the housing is divided into an inner housing and an outer housing, and the inner and outer housings are both hollow, the induction motor mechanism is fixedly connected to one side of the submersible pump, the impeller mechanism is fixedly connected inside the housing and connected to the induction motor mechanism through a rotating shaft, the backflow prevention mechanism is installed inside the housing, the backwashing and sewage discharge mechanism is fixedly connected inside the housing, the switch mechanism is fixedly connected inside and outside the housing, and the control module is fixedly connected to one side of the housing;

[0008] The shell and the stainless steel protective sleeve are hollowed out, one end of the cooling pipe is fixedly connected to one side of the submersible pump, and the other end is connected to the cavity between the shell and the stainless steel protective sleeve, and a cooling pipe solenoid valve is fixedly connected to the cooling pipe.

[0009] Preferably, the induction motor mechanism comprises a motor, a rotating shaft is mounted on the motor, and the motor and the rotating shaft are mounted in a stainless steel protective sleeve for protecting the motor from water and dust.

[0010] Preferably, the impeller mechanism includes impeller 1, which is fixedly connected to a baffle on the right side of impeller 1. Impeller 1 and the baffle are fixedly connected in a diffuser to guide the water flow to be transported along the path of the diffuser. Stainless steel protective sleeve 2 wraps multiple groups of impeller mechanisms to fix and protect the impeller mechanisms to prevent them from being worn, corroded or inhaling large particles of impurities during pump operation, thereby extending the service life of the impeller and ensuring the normal operation and efficiency of the submersible pump. Stainless steel protective sleeve 2 cooperates with the diffuser to enable multiple impellers to accelerate and pressurize the water flow.

[0011] Preferably, the backflow prevention mechanism includes an anti-backflow inner cover, an outer cover is installed on the anti-backflow inner cover, an anti-backflow pillar is fixedly connected to the outer cover, a spring 1 and a spring barrier are fixed on the anti-backflow pillar, spring 1 is connected to the outer cover, and spring 1 is installed on the spring barrier. When water flows out, the high-pressure water flow pushes the anti-backflow inner cover to push the anti-backflow inner cover, and the water flow pushes the outer cover open. The outer cover is connected to spring 1, and the water flow generates a thrust on spring 1. The spring barrier is subjected to the thrust of spring 1 and squeezes and compresses spring 1. The water flow pushes the anti-backflow mechanism from the high-pressure water flow outlet to push the anti-backflow mechanism open and flows out from the water outlet.

[0012] Preferably, the flow detection sensor is fixedly connected to the outer cover of the backflow prevention mechanism.

[0013] Preferably, a bearing is installed at the center of the stainless steel filter screen and the asymmetric fiber bundle filter material, and the bearing is fixedly installed on the rotating shaft. The stainless steel filter screen and the asymmetric fiber bundle filter material are rotated and filtered through the bearing.

[0014] Preferably, the switch mechanism includes an inlet solenoid valve fixedly connected to the outer shell, an inlet disc and an electromagnetic float fixedly connected to the inner shell to control the water flow entering the submersible pump, and an outlet solenoid valve and an outlet disc fixedly connected to the inner shell to control the water flow out.

[0015] Preferably, the control module is fixedly connected in a protection box and is used to control the induction motor mechanism and the backwashing and sewage discharge mechanism, and the protection box plays a role in waterproofing and dustproofing.

[0016] Preferably, the method comprises the following specific steps:

[0017] The detection value range of the flow detection sensor is L1 and L2, where L1 represents the initial flow rate when the submersible pump just starts working; L2 represents the submersible pump flow rate is less than 80% of the initial flow rate; L3 represents the submersible pump flow rate is less than 50% of the initial flow rate;

[0018] The time for timed backwashing is T1 and T2, where T1 represents the countdown of the pre-set flushing time of the submersible pump, and T2 represents the flushing time when the submersible pump starts flushing;

[0019] The flow rate reduction speed range detected by the flow detection sensor is D1 and D2, where D1 represents a low flow rate and a slow speed; D2 represents an abnormal flow reduction;

[0020] S10: When the submersible pump enters the water, the control module performs pre-operation on the submersible pump motor, fills the pump with water through pre-operation, starts timed backwashing and sets the time to T1, which starts the countdown;

[0021] S20: After the motor is started, the motor drives the rotating shaft to rotate, and the impeller mechanism is fixedly connected to the rotating shaft. When the impeller rotates, an atmospheric pressure difference is generated in the submersible pump, and water is pressed into the submersible pump from the water inlet;

[0022] S30: The impeller 1 rotates to throw the water out through the baffle, and accelerates and pressurizes the water toward the water outlet through the diffuser. The pressurized and accelerated water flows through the high-pressure water outlet and pushes the anti-backflow inner cover. The water pushes the outer cover open. The outer cover is connected to the spring 1. The water flow generates a thrust on the spring 1. The spring barrier receives the thrust of the spring 1 and squeezes and compresses the spring 1. The outer cover is lifted up, and the water flows out from the water outlet. At this time, the flow rate detected by the flow detection sensor installed on the outer cover is L1;

[0023] S40: When the timed backwashing setting time T1 returns to zero or the flow rate detected by the flow detection sensor installed on the outer cover of the anti-backflow mechanism is L2, or when the flow rate at time D2 is detected and the flow rate attenuation at the same time is abnormal, backwashing and sewage discharge begins, and the control module controls the backwashing and sewage discharge mechanism and the switch mechanism to perform backwashing;

[0024] S50: The control module controls the reset T1 and starts the countdown. The submersible pump continues to work normally until the backwash time T1 returns to zero or the flow rate L2 detected by the flow detection sensor is less than 80% of L1, or when the flow rate at time D2 is detected and the flow rate attenuation at the same time is abnormal, repeat step S40 again.

[0025] Preferably, step S40 also includes the following specific steps:

[0026] S410: When the time T1 set for the timed backwashing returns to zero or the data of the flow detection sensor is L2, and the flow rate reduction speed is D1, the control module determines that the dirt is small particles of sediment and starts backwashing. The T2 countdown starts, and the control module controls the water inlet solenoid valve and the water outlet solenoid valve to close the water inlet disc and the water outlet disc, controls the flushing pipe solenoid valve 1 to open the flushing pipe disc 1, controls the sewage suction pipe solenoid valve to open the sewage suction pipe disc, and controls the sewage discharge solenoid valve to open the sewage discharge disc;

[0027] S411: Water is pressed into the flushing pipe 1 under high pressure and is sprayed out from the nozzle 1. The sprayed water pressure cannot cause the spring 2 to bend significantly, and the scraper cannot rotate. The scraper on the rotating shaft is blocked by the block. The nozzle 1 cooperates with the rotating bearing 1 to perform rotary flushing and descaling on the stainless steel filter screen and the asymmetric fiber bundle filter material. The dirt accumulates in the dirt collecting chamber. The control module controls the hydraulic press to start working. The sewage extraction pipe extracts the dirt into the sewage extraction box, and the dirt in the sewage extraction box is discharged from the sewage discharge pipe;

[0028] S412: When the T2 flushing time countdown returns to zero, the backwashing is finished, the control module controls the outlet solenoid valve and the inlet solenoid valve to close the outlet disc and the inlet disc, and controls the flushing pipe solenoid valve 1, the suction pipe solenoid valve and the discharge solenoid valve to close the suction pipe disc and the discharge disc, the backwashing is finished, and the submersible pump starts to work;

[0029] S420: When the flow rate data detected by the flow detection sensor decreases at a rate of D2, the control module determines that the dirt is large solid particles, opens the flushing pipe disc 2 and repeats the above step S410;

[0030] S421: The high-pressure water flow is pressed into the flushing pipe 1 and the flushing pipe 2, and is sprayed out through the nozzle 1 and the nozzle 2. The sprayed water pressure causes the spring 2 to bend significantly, and the block on the spring 2 is pressed down by the high-pressure water flow. The downward-pressed block cannot stop the movement of the scraper. The rotating shaft on the bearing 2 is rotated by the bearing 2, and the rotating shaft drives the scraper to rotate, and the above step S411 is repeated;

[0031] S422: close the second flushing pipe disc and repeat the above S412 step;

[0032] S4310: When the flow rate detection sensor detects that the flow rate of the water outlet is at L3, the water output of the submersible pump is less than 50% of the normal flow rate. At this time, the control module controls the motor to stop working, the impeller 1 in the impeller mechanism slowly stops rotating, the water inlet solenoid valve and the water outlet solenoid valve remain in the normal open state, and the natural flow of water begins to cool the impeller mechanism and the housing. The control module controls the cooling pipe solenoid valve to open, and the cooling water enters the cavity between the stainless steel protective sleeve 1 and the housing through the cooling pipe, flows in the cavity, and cools the motor and the housing;

[0033] S4311: After the cooling water is introduced for 1 minute, the motor restarts and enters the next working flushing cycle. When a working flushing cycle ends and the flow rate detected by the flow detection sensor is still at L3, the control module issues an alarm, warning that the submersible pump is seriously blocked or the water intake is insufficient, and waits for technicians to come for maintenance;

[0034] S4320: When the flow rate detection sensor detects that the flow rate of the water outlet is greater than L1, the submersible pump performs a normal working flushing cycle;

[0035] (III) Beneficial effects

[0036] The present invention provides a small submersible pump capable of timed backwashing. The control module controls the submersible pump by setting the time for timed backwashing and detecting data from a flow detection sensor. The switch of the switch mechanism is controlled to flush the stainless steel filter screen and asymmetric fiber bundle filter material of the submersible pump through internal pressure and guiding the direction of water flow, clean the dirt and discharge the flushed dirt into the pump through the backwashing sewage discharge mechanism, effectively preventing the filter screen of the submersible pump from being clogged with dirt, ensuring unimpeded water flow, thereby improving the working efficiency of the submersible pump, reducing the downtime of the submersible pump caused by filter screen clogging and extending the service life of the submersible pump and its components. The backwashing submersible pump uses its own power to work without the need for any chemicals or additional energy support, and therefore will not cause secondary pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the cross-sectional view of the overall structure of the present invention.

[0039] Figure 3 This is a schematic diagram of the backwashing and sewage discharge mechanism structure of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the backflow prevention mechanism of the present invention;

[0041] Figure 5 It is a schematic diagram of the water inlet and impeller structure of the anti-backflow mechanism of the present invention;

[0042] Figure 6 It is a schematic diagram of the internal structure of the induction motor of the present invention;

[0043] Figure 7 It is a schematic diagram of the cross-sectional structure of the induction motor of the present invention;

[0044] Figure 8 This is a schematic diagram of the control module position structure of the present invention;

[0045] Fig. 9 It is a schematic diagram of the structure of the impeller mechanism of the present invention;

[0046] Fig.10 This is a schematic diagram of the position structure of the flow detection sensor of the present invention;

[0047] Fig.11 It is a front view of the present invention and a schematic diagram of the internal structure of the shell;

[0048] Fig.12It is a schematic diagram of the structure of the water outlet disc and the high-pressure water outlet of the switch mechanism of the present invention;

[0049] Fig.13 It is a schematic diagram of the cross-sectional structure of the high-pressure water outlet of the present invention;

[0050] Fig.14 This is a schematic diagram of the water inlet disc and the float position structure of the switch mechanism of the present invention;

[0051] Fig.15 This is a schematic diagram of the sewage suction pipe and housing structure of the switch mechanism of the present invention;

[0052] Fig.16 It is a schematic diagram of the bearing and filter surface structure of the present invention;

[0053] Fig.17 For the present invention Fig.16 The structural diagram of A in the figure;

[0054] Fig.18 For the present invention Fig.11 Schematic diagram of A in the middle;

[0055] Fig.19 For the present invention Fig.11 Schematic diagram of B in the figure;

[0056] Fig. 20 It is a schematic diagram of the filter screen of the present invention;

[0057] Fig.21 It is a schematic diagram of the bearing structure of the present invention;

[0058] Fig. 22 It is a schematic diagram of the flushing pipe and the nozzle of the present invention;

[0059] Fig.23 It is a schematic diagram of the cooling pipe and the cooling solenoid valve of the present invention.

[0060] In the figure:

[0061] 1. Shell; 101. Outer shell; 102. Inner shell; 103. Protective box;

[0062] 2. Induction motor mechanism; 201. Motor; 202. Stainless steel protective sleeve 1; 203. Rotating shaft; 204. Bearing 1; 205. Bearing 2; 206. Cooling pipe; 207. Cooling pipe solenoid valve;

[0063] 3. Impeller mechanism; 301. Impeller 1; 302. Baffle; 303. Diffuser; 304. Stainless steel protective cover 2;

[0064] 4. Anti-backflow mechanism; 401. Anti-backflow inner cover; 402. Outer cover; 403. Anti-backflow support; 404. Spring 1; 405. Spring barrier; 406. High-pressure water outlet; 407. Water inlet; 408. Water outlet;

[0065] 5. Stainless steel filter; 501, asymmetric fiber bundle filter material;

[0066] 6. Backwashing sewage discharge mechanism; 601. Sewage extraction pipe; 602. Sewage extraction box; 603. Sewage discharge pipe; 604. Sewage discharge solenoid valve; 605. Sewage discharge disc; 606. Flushing pipe 1; 607. Nozzle 1; 608. Hydraulic press; 609. Sewage collection chamber; 610. Scraper; 611. Rotating shaft; 612. Fixed block; 613. Spring 2; 614. Stopper; 615. Nozzle 2; 616. Flushing pipe 2;

[0067] 7. Switch mechanism; 701. Water inlet solenoid valve; 702. Water inlet disc; 703. Electromagnetic float; 704. Water outlet solenoid valve; 705. Water outlet disc; 706. Flushing pipe solenoid valve 1; 707. Flushing pipe disc 1; 708. Sewage suction pipe solenoid valve; 709. Sewage suction pipe disc; 710. Flushing pipe solenoid valve 2; 711. Flushing pipe disc 2;

[0068] 8. Control module;

[0069] 9. Connecting mechanism; 901. Fixing nut; 902. Fixing screw; 903. Fixing gasket;

[0070] 10. Flow detection sensor. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] Example 1, a preferred embodiment of a small submersible pump capable of timed backwashing provided by the present invention is as follows: Figures 1 to 22 As shown: a small submersible pump capable of timed backwashing comprises a housing 1, an induction motor mechanism 2, an impeller mechanism 3, an anti-backflow mechanism 4, a backwashing and sewage discharge mechanism 6, a switch mechanism 7, a control module 8 and a flow detection sensor 10.

[0073] like Figure 3 , Fig. 9 , Fig.11 , Figure 16-Figure 22As shown, the backwashing sewage discharge mechanism 6 includes a sewage suction pipe 601, which is fixedly connected to the outer shell 101, and the sewage suction pipe 601 is fixedly connected to the sewage collecting chamber 609 and the sewage suction box 602. The sewage suction box 602 is fixedly connected with a hydraulic press 608, a sewage discharge pipe 603 is installed on the sewage suction box 602, and a sewage discharge solenoid valve 604 is fixedly connected to the sewage discharge pipe 603. The sewage discharge disc 605 is fixedly connected in the sewage discharge pipe 603, and the flushing pipe 1 606 and the flushing pipe 2 616 are fixedly connected to the inner shell 102 and are both connected to the inner shell 102. The nozzle 1 607 is fixedly connected to the flushing pipe 1 606, and the nozzle 2 615 is fixedly connected to the flushing pipe 2 616, and the nozzle 1 607 and the nozzle 2 615 are close to the stainless steel filter 5 and one end of the asymmetric fiber bundle filter material 501, and the rotating shaft 611 is fixedly installed on the bearing 1 204, the scraper 610 is fixedly connected to the rotating shaft 611, the fixed block 612 is fixedly connected to the inner shell 102 and is inclined at a 30-degree angle to the inner shell 102, and the fixed block 612 is fixedly connected with the spring 2 613. Since the fixed block 612 is inclined at a 30-degree angle to the inner shell, the spring 2 613 maintains an inclined angle of 30 degrees with the filter screen, and the spring 2 613 is fixedly connected to the stopper 614. The stopper 614 blocks the scraper 610 under the action of the 30-degree inclined angle of the spring. During the backwashing process, the stopper 614 is impacted and pressed according to the spraying water pressure. When the water pressure is large, the spring 2 613 is impacted and pressed downward and bent, and the stopper 614 cannot block the scraper 610. The scraper 610 rotates to scrape and clean the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501;

[0074] like Figure 6 , Figure 7 As shown, the induction motor mechanism 2 includes a motor 201, a rotating shaft 203 is installed on the motor 201, the motor 201 and the rotating shaft 203 are installed in a stainless steel protective sleeve 202, which is used to protect the motor 201 from water and dust. A hollow space is set between the housing 101 and the stainless steel protective sleeve 202, one end of a cooling pipe 206 is fixedly connected to one side of the submersible pump, and the other end is connected to the cavity between the housing 101 and the stainless steel protective sleeve 202, and a cooling pipe solenoid valve 207 is fixedly connected to the cooling pipe. When the flow rate of the submersible pump is less than 50% of the initial flow rate, the control module 8 controls the cooling pipe solenoid valve 207 to open, and cooling water flows from the cooling pipe into the cavity between the housing 101 and the stainless steel protective sleeve 202, so as to cool the motor 201 and the housing 101;

[0075] like Fig. 9 , Fig.10As shown, the impeller mechanism 3 includes an impeller 1 301, a baffle 302 is fixedly connected to the right side of the impeller 1 301, and the impeller 1 301 and the baffle 302 are fixedly connected in the diffuser 303, which is used to guide the water flow to be transported along the path of the diffuser 303. The stainless steel protective sleeve 2 304 wraps the multiple groups of impeller mechanisms 3 to fix and protect the impeller mechanisms 3 to prevent them from being worn, corroded or inhaling large particles of impurities during the operation of the pump, thereby extending the service life of the impeller and ensuring the normal operation and efficiency of the submersible pump. The stainless steel protective sleeve 2 304 cooperates with the diffuser 303 to enable the multiple impellers to accelerate and pressurize the water flow;

[0076] like Figure 4 , Fig.10 As shown, the backflow prevention mechanism 4 includes an inner backflow prevention cover 401, an outer cover 402 is installed on the inner backflow prevention cover 401, an anti-backflow support 403 is fixedly connected to the outer cover 402, a spring 1 404 and a spring barrier 405 are fixed on the anti-backflow support 403, the spring 1 404 is connected to the outer cover 402, and the spring 1 404 is installed on the spring barrier 405. When water flows out, the high-pressure water flow pushes the anti-backflow inner cover 401, pushes the anti-backflow inner cover 401, and the water flow pushes the outer cover 402 open. The outer cover is connected to the spring 1 404, and the water flow generates a thrust on the spring 1 404. The spring barrier 405 is subjected to the thrust of the spring 1 404 and squeezes and compresses the spring 1 404. The water flow pushes the anti-backflow mechanism 4 from the high-pressure water flow outlet 406, pushes the anti-backflow mechanism 4 open, and flows out from the water outlet 408.

[0077] like Fig.10 As shown, the flow detection sensor 10 is fixedly connected to the outer cover 402 of the backflow prevention mechanism 4;

[0078] like Fig.23 As shown, a bearing 204 is installed at the center of the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501, and a bearing 205 is installed above the bearing 204 and is intermittently fixedly installed on the rotating shaft 203 with the bearing 204, and the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501 are rotated and filtered through the bearing 204;

[0079] like Figure 3 , Fig.12 , Fig.14 , Fig.19 As shown, the switch mechanism 7 includes a water inlet electromagnetic valve 701, which is fixedly connected to the outer shell 101, a water inlet disc 702 and an electromagnetic float 703 are fixedly connected to the inner shell 102 to control the water flow entering the submersible pump, and a water outlet electromagnetic valve 704 and a water outlet disc 705 are fixedly connected to the inner shell 102 to control the water flow out;

[0080] like Figure 8As shown, the control module 8 is fixedly connected in the protection box 103, and is used to control the induction motor mechanism 2 and the backwashing and sewage discharge mechanism 6. The protection box 103 plays a role in waterproofing and dustproofing.

[0081] Example 2, based on Example 1, a preferred embodiment of a small submersible pump capable of timed backwashing provided by the present invention is as follows: Figures 1 to 14 As shown: a small submersible pump capable of timed backwashing, the control module 8 controls the induction motor mechanism 2 to start, the rotating shaft 203 drives the impeller 301 on the impeller mechanism 3 to rotate, so that a pressure difference is generated in the submersible pump, and the water flow is pressed into the submersible pump from the hole of the water inlet 407 for primary filtration, and secondary filtration is performed through the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501, and impurities are accumulated in the sewage collection chamber 609, and the water flow is accelerated and pressurized toward the water outlet through the impeller mechanism 3, and the high-pressure water flows out from the high-pressure water outlet 406, lifts the anti-backflow mechanism 4, and flows out from the water outlet; when the submersible pump is working, the control module 8 sets the timing and receives the data of the flow detection sensor 10, and when the timing T1 ends or the flow rate is less than 80% or when the flow rate at time D2 is detected and the flow rate attenuation at the same time is abnormal, the backwashing and sewage discharge mechanism 6 and the switch mechanism 7 are controlled to work, and the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501 of the submersible pump are washed and scraped to remove dirt;

[0082] The detection value range of the flow detection sensor 10 is L1, L2, and L3, wherein L1 represents the initial flow rate when the submersible pump just starts working; L2 represents that the submersible pump flow rate decreases smoothly and the flow rate is less than or equal to 80% of the initial flow rate; L3 represents that the submersible pump flow rate is less than or equal to 50% of the initial flow rate;

[0083] The time for timed backwashing is T1 and T2, where T1 represents the countdown of the pre-set flushing time of the submersible pump, and T2 represents the flushing time when the submersible pump starts flushing;

[0084] The submersible pump's timed backwash countdown time T1 is 58 minutes, the submersible pump's backwash flushing time T2 is 1 minute, and a submersible pump's working flushing cycle is 59 minutes, that is, after 58 minutes of working time, backwashing is performed for 1 minute, and after the backwashing is completed, the next working flushing cycle begins;

[0085] The flow rate reduction speed detected by the flow detection sensor 10 is in the range of D1 and D2, wherein D1 represents that the flow rate reduction speed is close to or consistent with that of the same period; D2 represents that the flow rate detected by the flow detection sensor 10 is significantly reduced compared with the flow rate at this time of the same period, indicating that the flow rate reduction is abnormal;

[0086] S10: When the submersible pump enters the water, the control module 8 performs pre-operation on the submersible pump motor 201 to fill the pump with water through pre-operation. After the pump is filled, the induction motor mechanism 2 is started and the timed backwashing is started and the time is set to T1, and T1 starts the countdown;

[0087] S20: After the motor 201 is started, the motor 201 drives the rotating shaft 203 to rotate, the impeller mechanism 3 is fixedly connected to the rotating shaft 203, and the impeller 301 rotates, so that an atmospheric pressure difference is generated in the submersible pump, and water is pressed into the submersible pump from the water inlet 407;

[0088] S30: When the impeller 301 rotates to generate a pressure difference inside and outside the submersible pump, the water flow is pressed into the pump from the small hole on the water inlet 407. After the water flow is filtered by the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501, the impeller 301 rotates to throw the filtered water flow out through the baffle 302, and the diffuser 303 controls the thrown water flow to continue to accelerate and pressurize toward the water outlet. When the water flow is pushed to the high-pressure water flow outlet 406, the pressurized and accelerated water flow pushes the anti-backflow inner cover 401 through the high-pressure water flow outlet 406, and the water flow pushes the outer cover 402 open. The outer cover is connected to the spring 404, and the water flow generates a thrust on the spring 404. The spring barrier 405 is pushed by the spring 404 and squeezes and compresses the spring 404, and the outer cover 402 is lifted up, and the water flows out from the water outlet 408. At this time, the flow rate detected by the flow detection sensor 10 is L1;

[0089] S40: When the timed backwashing setting time T1 returns to zero or the flow rate detected by the flow detection sensor 10 installed on the outer cover 402 of the anti-backflow mechanism 4 is L2, or when the flow rate at time D2 is detected and the flow rate attenuation at the same time is abnormal, backwashing and sewage discharge are started, and the submersible pump stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501 are cleaned, and the control module 8 controls the backwashing and sewage discharge mechanism 6 and the switch mechanism 7, including the following specific steps:

[0090] S410: When the time T1 set for the timed backwashing returns to zero or the data of the flow detection sensor 10 is L2, and the flow rate reduction speed is D1, the control module 8 determines that the filter is blocked by small particles of sediment, and controls the start of backwashing, and the T2 countdown starts. The control module 8 controls the water inlet solenoid valve 701 of the switch mechanism 7 to work, and the water inlet disc 702 rotates close to the electromagnetic float 703 to close the water inlet 407 of the submersible pump, controls the water outlet solenoid valve 704 to work, and the water outlet disc 705 rotates to close the water inlet and outlet, controls the flushing pipe solenoid valve 1 706 to work, controls the flushing pipe disc 1 707 to open the flushing pipe 1 606, and at the same time, the control module 8 controls the sewage suction pipe solenoid valve 708 to work, and the sewage suction pipe disc 709 is opened, and controls the sewage discharge solenoid valve 604 to work to open the sewage discharge disc 605;

[0091] S411: The water inlet disc 702 and the water outlet disc 705 are closed, and the unfiltered water cannot enter the pump. The motor 201 continues to drive the rotating shaft 203 to rotate, and the water is transported to the water outlet 408. The water outlet disc 705 is closed, and the water cannot flow out. The internal water pressure increases, and the flushing pipe solenoid valve 706 opens the flushing pipe disc 707. The water is pressed into the flushing pipe 606 under high pressure and sprayed out from the nozzle 607. The sprayed water pressure cannot make the spring 613 bend significantly, and the scraper 610 cannot rotate. The scraper 610 on the rotating shaft 611 is blocked by the block 614, and the rotating shaft 611 does not rotate. The stainless steel filter 5 and the asymmetric fiber The fiber bundle filter material 501 is connected to the rotating shaft 203 of the motor 201 through the bearing 1 204. The rotating shaft 203 rotates, and the bearing 1 204 drives the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501 to rotate. The nozzle 1 607 cooperates with the rotating bearing 1 204 to perform rotational flushing and descaling on the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501. The flushed dirt is accumulated in the dirt collecting chamber 609. The control module 8 controls the hydraulic press 608 to start working, and the sewage pipe 601 draws dirt into the sewage box 602. The sewage discharge pipe 603 is connected to the sewage box 602, and the dirt in the sewage box 602 is discharged from the sewage discharge pipe 603 until the flushing time T2 returns to zero, and the backwashing is completed;

[0092] S412: When the T2 flushing time countdown returns to zero, the backwashing is finished, and the control module 8 controls the outlet solenoid valve 704 and the inlet solenoid valve 701 to close the outlet disc 705 and the inlet disc 702, and controls the flushing pipe solenoid valve 1 706, the suction pipe solenoid valve 708 and the sewage discharge solenoid valve 604 to close the suction pipe disc 709 and the sewage discharge disc 605, and the backwashing is finished, and the submersible pump starts to work;

[0093] S420: When the flow rate data detected by the flow detection sensor 10 decreases at a rate of D2, the flow rate detected by the flow detection sensor at this time is significantly reduced compared with the flow rate at the same period, and the flow reduction is abnormal. The control module 8 determines that the filter screen is blocked by abnormally large particles of dirt, and the control module 8 controls backwashing. The control module 8 controls the water inlet solenoid valve 701 and the water outlet solenoid valve 704 to close the water inlet disc 702 and the water outlet disc 705, controls the sewage suction pipe solenoid valve 708 to work, and the sewage suction pipe disc 709 to open, controls the sewage discharge solenoid valve 604 to work and open the sewage discharge disc 605, and controls the flushing pipe solenoid valve 1 706 and the flushing pipe solenoid valve 2 710 to open the flushing pipe disc 1 707 and the flushing pipe disc 2 711;

[0094] S421: At this time, the water inlet disc 702 and the water outlet disc 705 are closed, and the water flow cannot be pressed into the submersible pump. The water outlet disc 705 is closed, and the high-pressure water flow is pressed into the flushing pipe 1 606 and the flushing pipe 2 616, and is sprayed out through the nozzle 1 607 and the nozzle 2 615. The sprayed water pressure causes the spring 2 613 to bend significantly, and the stopper 614 on the spring 2 613 is pressed down by the high-pressure water flow. The downward-pressed stopper 614 cannot stop the movement of the scraper 611, and the rotating shaft 611 on the bearing 2 205 is The second bearing 205 rotates, the rotating shaft 611 drives the scraper 610 to rotate, the rotating shaft 203 rotates to drive the first bearing 204 to rotate, the first bearing 204 drives the stainless steel filter 5 and the asymmetric fiber bundle filter material 501 to rotate, the nozzle 1 607 and the second nozzle 615 cooperate with the scraper 610 to scrape and wash the large particles of dirt attached to the stainless steel filter 5 and the asymmetric fiber bundle filter material 501, and the scraper keeps rotating in the opposite direction to the filter until the backwashing time T2 returns to zero, and the backwashing ends;

[0095] S422: When the T2 flushing time countdown returns to zero, the backwashing is finished, the control module 8 controls the outlet solenoid valve 704 and the inlet solenoid valve 701 to close the outlet disc 705 and the inlet disc 702, and controls the flushing pipe solenoid valve 1 706 and the flushing pipe solenoid valve 2 710 to close the flushing pipe disc 1 707 and the flushing pipe disc 2 711, the sewage suction pipe solenoid valve 708 and the sewage discharge solenoid valve 604 work to close the sewage suction pipe disc 709 and the sewage discharge disc 605, the backwashing is finished, the submersible pump starts to work, and the flow detection sensor 10 detects the flow of the water outlet 408;

[0096] S4310: When the flow rate detection sensor 10 detects that the flow rate of the water outlet 408 is at L3, the water output of the submersible pump is less than 50% of the normal flow rate. At this time, the control module 8 controls the motor 201 to stop working, the impeller 301 in the impeller mechanism 3 slowly stops rotating, the water inlet solenoid valve 701 and the water outlet solenoid valve 704 remain in the normal open state, and the natural flow of water begins to cool the impeller mechanism 3 and the housing 101. The control module 8 controls the cooling pipe solenoid valve 207 to open, and the cooling water enters the cavity between the stainless steel protective sleeve 202 and the housing 101 through the cooling pipe 206, and flows in the cavity to cool the motor 201 and the housing 101;

[0097] S4311: After the cooling water is introduced for 1 minute, the motor 201 restarts and enters the next working flushing cycle. When a working flushing cycle ends and the flow rate detected by the flow detection sensor 10 is still at L3, the control module 8 controls the submersible pump to stop working and issues an alarm, warning that the submersible pump is seriously blocked or insufficiently supplied with water, and waits for technicians to come for repair;

[0098] S4320: When the flow rate detection sensor 10 detects that the flow rate of the water outlet 408 is greater than L1, the submersible pump performs a normal working flushing cycle;

[0099] S50: The control module 8 controls the resetting of the backwash time T1 and restarts the countdown. The submersible pump continues to work normally until the backwash time T1 returns to zero or the flow L2 detected by the flow detection sensor 10 is less than 80% of L1, or when the flow at time D2 is detected and the flow attenuation at the same time is abnormal, step S40 is repeated again.

[0100] Embodiment 3, in addition to the above control steps, also includes manual mode control of the submersible pump operation, specifically:

[0101] Manual mode is tested before the submersible pump is controlled in automatic mode, including the following specific steps:

[0102] 1): The control module 8 controls the motor 201 to perform pre-operation. When the water in the submersible pump starts to flow out from the water outlet 408, the motor 201 is controlled to be turned off, and the submersible pump stops working;

[0103] 2): When the control module 8 successfully turns off the motor 201 and the submersible pump no longer works, it is determined that the automatic mode operates normally, the motor 201 is turned on, and the submersible pump starts to work normally;

[0104] 3): When the control module 8 cannot control the shutdown of the motor 201, it is determined that the automatic mode cannot operate normally, and the submersible pump is switched to the manual mode to control the operation of the submersible pump. The water inlet solenoid valve 701 and the water outlet solenoid valve 704 are manually controlled to be closed, and the unfiltered water flow cannot enter the submersible pump, affecting the backwashing work of the submersible pump. The water outlet solenoid valve 704 is closed, and the water flow accelerated by the impeller mechanism 3 cannot flow out from the water outlet 408. According to the flow rate detected by the control module 8, the flushing pipe solenoid valve 1 706 on the flushing pipe 1 606 is manually controlled to open, or the flushing pipe solenoid valve 1 706 and the flushing pipe solenoid valve 2 710 of the flushing pipe 1 606 and the flushing pipe 2 616 are opened at the same time. The control module 8 controls the flushing countdown for one minute. After the flushing countdown ends, the flushing pipe solenoid valve 1 706 is manually controlled to be closed, or the flushing pipe solenoid valve 1 706 and the flushing pipe solenoid valve 2 710 are closed at the same time, and the water inlet solenoid valve 701 and the water outlet solenoid valve 2 704 are opened, and the submersible pump starts to operate normally.

[0105] The present invention provides a small submersible pump capable of timed backwashing. The control module 8 controls the submersible pump by setting the time for timed backwashing and detecting data from a flow detection sensor 10. By controlling the switch of a switch mechanism 7, the stainless steel filter screen 5 and the asymmetric fiber bundle filter material 501 of the submersible pump are flushed and scraped through internal pressure and guiding the direction of water flow, and dirt is cleaned and discharged into the pump through a backwashing sewage discharge mechanism 6, effectively preventing the filter screen of the submersible pump from being clogged with dirt, ensuring unimpeded water flow, thereby improving the working efficiency of the submersible pump, reducing the downtime of the submersible pump caused by filter screen clogging, and extending the service life of the submersible pump and its components. The backwashing submersible pump uses its own power to work without the need to use any chemicals or additional energy support, so it will not cause secondary pollution to the environment.

[0106] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0107] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small submersible pump capable of timed backwashing, comprising a housing (1), an induction motor mechanism (2), an impeller mechanism (3), a backflow prevention mechanism (4), a backwashing and sewage discharge mechanism (6), a switch mechanism (7), a control module (8) and a flow detection sensor (10), characterized in that: The housing (1) is divided into an inner housing (101) and an outer housing (102), the inner housing and the outer housing are both hollow, the induction motor mechanism (2) is fixedly connected to one side of the submersible pump, the impeller mechanism (3) is fixedly connected to the inside of the housing (1) and is connected to the induction motor mechanism (2) via a rotating shaft (203), the backflow prevention mechanism (4) is installed inside the housing (1), the backwashing and sewage discharge mechanism (6) is fixedly connected to the inside of the housing (1), the switch mechanism is fixedly connected to the inside and outside of the housing (1), and the control module (8) is fixedly connected to one side of the housing; A hollow space is provided between the shell (101) and the stainless steel protective sleeve (202); one end of a cooling pipe (206) is fixedly connected to one side of the submersible pump, and the other end is connected to the cavity between the shell (101) and the stainless steel protective sleeve (202); a cooling pipe solenoid valve (207) is fixedly connected to the cooling pipe.

2. A small submersible pump capable of timed backwashing according to claim 1, characterized in that: The induction motor mechanism (2) comprises a motor (201), a rotating shaft (203) is mounted on the motor (201), and the motor (201) and the rotating shaft (203) are mounted in a stainless steel protective sleeve (202).

3. A small submersible pump capable of timed backwashing according to claim 2, characterized in that: The impeller mechanism (3) comprises an impeller 1 (301), a baffle (302) is fixedly connected to the right side of the impeller 1 (301), the impeller 1 (301) and the baffle (302) are fixedly connected in a diffuser (303) for guiding water flow to be transported along the path of the diffuser (303), and a stainless steel protective sleeve 2 (304) protects and fixes the impeller mechanism (3).

4. A small submersible pump capable of timed backwashing according to claim 3, characterized in that: The backflow prevention mechanism (4) comprises an inner backflow prevention cover (401), an outer cover (402) is mounted on the inner backflow prevention cover (401), an anti-backflow support (403) is fixedly connected to the outer cover (402), a spring (404) and a spring barrier (405) are fixed to the anti-backflow support (403), the spring (404) is connected to the outer cover (402), and the spring (404) is mounted on the spring barrier (405).

5. A small submersible pump capable of timed backwashing according to claim 4, characterized in that: The flow detection sensor (10) is fixedly connected to the outer cover (402) of the backflow prevention mechanism (4).

6. A small submersible pump capable of timed backwashing according to claim 5, characterized in that: A bearing 1 (204) is installed at the center of the stainless steel filter screen (5) and the asymmetric fiber bundle filter material (501), and the bearing 1 (204) is fixedly installed on the rotating shaft (203).

7. A small submersible pump capable of timed backwashing according to claim 6, characterized in that: The switch mechanism (7) comprises a water inlet electromagnetic valve (701), the water inlet electromagnetic valve (701) is fixedly connected to the outer shell (101), and the water outlet electromagnetic valve (704) is fixedly connected to the inner shell (102).

8. A small submersible pump capable of timed backwashing according to claim 7, characterized in that: The control module (8) is fixedly connected in the protection box (103), and the protection box (103) is fixed on one side of the submersible pump.

9. A small submersible pump capable of timed backwashing according to claim 8, characterized in that: The specific steps include: The detection value range of the flow detection sensor (10) is L1, L2, and L3, wherein L1 represents the initial flow rate when the submersible pump just starts working; L2 means that the submersible pump flow rate is less than 80% of the initial flow rate; L3 means that the submersible pump flow rate is less than 50% of the initial flow rate; The time for timed backwashing is T1 and T2, where T1 represents the countdown of the pre-set flushing time of the submersible pump, and T2 represents the flushing time of the submersible pump backwashing; The flow rate reduction speed detected by the flow rate detection sensor (10) is in the range of D1 and D2, wherein D1 represents a low flow rate and a slow speed; D2 represents abnormal flow reduction; S10: When the submersible pump enters the water, the control module (8) performs a pre-operation on the motor (201), fills the pump with water through the pre-operation, starts the timed backwashing and sets the time to T1, which starts the countdown; S20: After the motor (201) is started, the motor (201) drives the rotating shaft (203) to rotate, the impeller mechanism (3) is fixedly connected to the rotating shaft (203), and the impeller 1 (301) rotates, so that an atmospheric pressure difference is generated in the submersible pump, and water is pressed into the submersible pump from the water inlet (407); S30: The impeller 1 (301) rotates to throw the water through the baffle (302), and accelerates and pressurizes the water toward the water outlet through the diffuser (303). The pressurized and accelerated water flows through the high-pressure water outlet (406) and pushes the anti-backflow inner cover (401). The water flows open the outer cover (402). The outer cover is connected to the spring 1 (404). The water flows generate thrust on the spring 1 (404). The spring barrier (405) receives the thrust of the spring 1 (404) and squeezes and compresses the spring 1 (404). The outer cover (402) is lifted up, and the water flows out from the water outlet (408). At this time, the flow rate detected by the flow detection sensor (10) installed on the outer cover (402) is L1; S40: when the timed backwashing setting time T1 returns to zero or the flow rate detected by the flow detection sensor (10) installed on the outer cover (402) of the backflow prevention mechanism (4) is L2, or when the flow rate at time D2 is detected to be abnormal with the flow rate attenuation at the same time, backwashing and sewage discharge begins, and the control module (8) controls the backwashing and sewage discharge mechanism (6) and the switch mechanism (7) to perform backwashing; S50: The control module 8 controls the reset of T1 and starts the countdown. The submersible pump continues to work normally until the backwash time T1 returns to zero or the flow rate L2 detected by the flow detection sensor (10) is less than 80% of L1, or when the flow rate at time D2 is detected and the flow rate attenuation at the same time is abnormal, step S40 is repeated again.

10. A small submersible pump capable of timed backwashing according to claim 9, characterized in that: Step S40 also includes the following specific steps: S410: When the time T1 set for the timed backwashing is reset to zero or the data of the flow detection sensor (10) is L2, and the flow rate reduction speed is D1, the control module (8) determines that the dirt is small particles of sediment and performs backwashing, and the T2 countdown starts. The control module (8) controls the backwashing sewage discharge mechanism (6) to open the flushing pipe electromagnetic valve 1 (706) and close the water inlet electromagnetic valve (701) and the water outlet electromagnetic valve (704); S411: Water is pressed into the flushing pipe 1 (606) under high pressure and is ejected from the nozzle 1 (607). The ejected water pressure cannot cause the spring 2 (613) to bend significantly, and the scraper (610) cannot rotate. The scraper (610) on the rotating shaft (611) is blocked by the block (614). The nozzle 1 (607) cooperates with the rotating bearing 1 (204) to perform rotary flushing and descaling on the stainless steel filter screen (5) and the asymmetric fiber bundle filter material (501). The dirt is accumulated in the dirt collecting chamber (609), and the control module (8) controls the backwashing and sewage discharge mechanism (6) to discharge the dirt. S412: When the T2 flushing time countdown returns to zero, the backwashing is finished, the control module (8) controls the water outlet solenoid valve (704) and the water inlet solenoid valve (701) to close, and controls the flushing pipe solenoid valve 1 (706), the sewage suction pipe solenoid valve (708) and the sewage discharge solenoid valve (604) to work, the backwashing is finished, and the submersible pump starts to work; S420: When the flow rate data detected by the flow rate detection sensor (10) decreases at a speed D2, the control module (8) determines that the dirt is large solid particles, repeats step S410 and opens the flushing pipe disc 2 (711); S421: The high-pressure water flow is pressed into the flushing pipe 1 (606) and the flushing pipe 2 (616), and is ejected from the nozzle 1 (607) and the nozzle 2 (615). The ejected water pressure causes the spring 2 (613) to bend significantly, and the stopper (614) on the spring 2 (613) is pressed downward by the high-pressure water flow. The downward-pressed stopper (614) cannot stop the movement of the scraper (611). The rotating shaft (611) on the bearing 2 (205) is rotated by the bearing 2 (205), and the rotating shaft (611) drives the scraper (610) to rotate, and the above step S411 is repeated; S422: Close the flushing pipe disc 2 (711), and repeat the above S412 step; S4310: When the flow rate detection sensor (10) detects that the flow rate at the water outlet (408) is at L3, the water output of the submersible pump is less than 50% of the normal flow rate. At this time, the control module (8) controls the motor (201) to stop working, the impeller 1 (301) slowly stops rotating, the water inlet solenoid valve (701) and the water outlet solenoid valve (704) remain in a normal open state, and the natural flow of water begins to cool the impeller mechanism (3) and the housing (101). The control module (8) controls the cooling pipe solenoid valve (207) to open, and the cooling water enters the cavity between the stainless steel protective sleeve 1 (202) and the housing (101) through the cooling pipe (206), thereby cooling the motor (201) and the housing (101); S4311: After the cooling water is introduced for one minute, the motor (201) restarts and enters the next working flushing cycle. When a working flushing cycle ends and the flow rate detected by the flow detection sensor (10) is still at L3, the control module (8) issues an alarm, warning that the submersible pump is seriously blocked or the submersible pump is insufficiently supplied with water, and waits for a technician to come for repair; S4320: When the flow rate detection sensor (10) detects that the flow rate of the water outlet (408) is greater than L1, The submersible pump performs a normal working flushing cycle.

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