Submersible pump with protection function

Abstract

The invention relates to the field of submersible pumps, in particular to a submersible pump with a protection function. A submersible pump with a protection function comprises a submersible pump body, a connecting cylinder, a protection base, a reciprocating unit, a blocking net and the like. The submersible pump body is connected with a protective base; a connecting cylinder is detachably connected between the submersible pump body and the protective base; the connecting cylinder is connected with a reciprocating unit; the connecting cylinder is fixedly connected with a blocking net which is a flexible net; the blocking net is connected with the reciprocating unit; the reciprocating unit is used for driving the blocking net to stretch and contract, and the blocking net is cleaned. According to the submersible pump, the movable barrel is arranged, the water flow channels are switched through vertical movement of the movable barrel, compared with a single-flow-channel submersible pump, the maintenance frequency is reduced, the blocking net is expanded and contracted, impurities intercepted on the blocking net are shaken off, automatic cleaning of the blocking net is achieved, the fault-free operation time of the submersible pump is further prolonged, and the service life of the submersible pump is prolonged. And the frequency of manual maintenance is further reduced, and time and energy are saved.

Description

Technical Field

[0001] The present invention relates to the field of submersible pumps, and particularly to a submersible pump with a protection function. Background Art

[0002] In a fish tank or an aquarium, a submersible pump is generally equipped to filter the water therein. Thus, the submersible pump is an important part of the filtration system of the fish tank or the aquarium and is a key factor determining the water quality of the fish tank or the aquarium.

[0003] Among them, according to different breeding requirements, some aquatic animals are not suitable for naked tank breeding. Generally, a layer of bottom sand and aquatic plants are planted therein. However, the activities of the aquatic animals will generate a large amount of waste, resulting in a decline in water quality. Moreover, during the activity process, the bottom sand will also be lifted, and the bottom sand and corresponding impurities are easily involved in the submersible pump, which may cause wear of the rotor of the submersible pump, and then cause vibration and noise of the submersible pump, and the service life of the submersible pump is reduced. Therefore, a filter screen is generally set to filter it. However, the existing submersible pumps on the market are generally single-channel. After the filter screen is blocked, manual cleaning is required, and the maintenance frequency of the submersible pump in a fish tank or an aquarium with a large breeding density is high, consuming a large amount of time and energy. Summary of the Invention

[0004] In order to overcome the shortcomings that the existing single-channel submersible pump needs manual cleaning after the filter screen is blocked, has a high maintenance frequency, and consumes a large amount of time and energy, the present invention provides a submersible pump with a protection function.

[0005] The technical solution is as follows: A submersible pump with a protection function includes a submersible pump body, a connecting cylinder, and a protection base; the submersible pump body is connected with the protection base; a connecting cylinder is detachably connected between the submersible pump body and the protection base; it further includes a reciprocating unit, a retaining net, a first U-shaped plate, a first electric actuator, a movable cylinder, and a filter screen; the connecting cylinder is connected with the reciprocating unit; the connecting cylinder is fixedly connected with the retaining net, and the retaining net is a flexible net; the retaining net is connected with the reciprocating unit; the reciprocating unit is used to drive the retaining net to expand and contract to clean the retaining net; the bottom of the retaining net is connected with the protection base; an annular cavity is opened in the connecting cylinder; three first U-shaped plates are fixedly connected in the annular cavity; three first electric actuators are installed in the connecting cylinder; each first electric actuator corresponds to a first U-shaped plate; three one-word sliding grooves are opened in the annular cavity; the telescopic parts of all the first electric actuators are commonly fixedly connected with the movable cylinder through sliding rods, and each sliding rod slides in a one-word sliding groove; several diversion openings are opened in the lower part of the annular cavity; the diversion openings are all located outside the retaining net; the movable cylinder is located inside the retaining net; the movable cylinder is slidably connected with the connecting cylinder; several filter screens are installed in the annular cavity; the movable cylinder cooperates with all the filter screens, and the movable cylinder is used to block all the filter screens.

[0006] Furthermore, the reciprocating unit includes a second U-shaped plate, a second electric actuator, a fixed ring, a movable ring, and a connecting rod; three second U-shaped plates are fixedly connected inside the annular cavity; a second electric actuator is installed in each second U-shaped plate; a fixed ring is fixedly connected to the upper part of the barrier net; a movable ring is fixedly connected to the lower part of the barrier net; the fixed ring is fixedly connected to the connecting cylinder; a connecting rod is connected to the telescopic part of each second electric actuator; all the connecting rods penetrate the annular cavity and are slidably connected to the connecting cylinder; all the connecting rods are fixedly connected to the movable ring; all the connecting rods are located inside the barrier net.

[0007] Furthermore, it also includes various sealing sheets connected inside the annular cavity; each sealing sheet corresponds to a shunt port.

[0008] Furthermore, the sealing sheet is made of rubber.

[0009] Furthermore, the side of the sealing sheet close to the filter screen is fixedly connected to the bottom of the annular cavity.

[0010] Furthermore, a first sealing ring is screwed onto the connecting cylinder, and the first sealing ring is used to seal the annular cavity.

[0011] Furthermore, a number of anti-slip grooves are arranged in an annular array on the first sealing ring, which is convenient for removing the first sealing ring from the annular cavity.

[0012] Furthermore, a grille is arranged in an annular array on the protective base.

[0013] Furthermore, it also includes a contact part fixedly connected to the protective base. A cavity is opened inside the contact part; a deformable annular bladder is arranged on the contact part, and the annular bladder communicates with the cavity inside the contact part; an annular drain port is arranged on the contact part, and the drain port communicates with the cavity inside the contact part; the drain port is located inside the annular bladder; a shunt cavity is opened inside the movable cylinder, and an opening is arranged at the lower part of the shunt cavity; the shunt cavity cooperates with the drain port; a number of water spray ports are opened on the side of the movable cylinder facing the barrier net; the shunt cavity communicates with all the water spray ports; a number of water inlet ports are arranged on the contact part, and the water inlet ports communicate with the cavity inside the contact part; a one-way valve is arranged inside the water inlet port, and the one-way valve only allows the water flow inside the connecting cylinder to flow into the cavity inside the contact part; a second sealing ring is slidably connected to the drain port; a number of limiting grooves are opened on the second sealing ring; a number of limiting rods are fixedly connected inside the drain port; each limiting rod is located in a limiting groove.

[0014] Furthermore, a sealing rubber strip is arranged at the lower part of the movable cylinder.

[0015] The beneficial effects are as follows: 1. By setting the movable cylinder in the present invention, the switching of the water flow path is realized by the up and down movement of the movable cylinder. Compared with a single-flow submersible pump, the maintenance frequency is reduced, and the barrier net is expanded and contracted, and the impurities intercepted on the barrier net are shaken off, realizing the automatic cleaning of the barrier net, further prolonging the time for the submersible pump to be used without obstacles, and further reducing the frequency of manual maintenance, saving time and energy.

[0016] 2. By setting the contact member, when the blocking net is deformed by the up and down movement of the movable ring, the movable ring squeezes the annular bladder, thereby squeezing the water in the contact member into the diversion cavity of the movable cylinder, and then backwashing the blocking net through each water spray port, effectively reducing the stubborn residual impurities on the blocking net. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic three-dimensional structure diagram of the submersible pump with a protection function according to the present invention; Figure 2 Schematic three-dimensional structure diagram of the connecting cylinder and the protection base of the present invention; Figure 3 Schematic internal structure diagram of the connecting cylinder and the protection base of the present invention; Figure 4 Schematic installation position diagram of the movable cylinder of the present invention; Figure 5 Schematic installation position diagram of the sealing piece of the present invention; Figure 6 Schematic diagram of the cooperation between the lower part of the movable cylinder and the drain port of the present invention; Figure 7 Schematic cross-sectional diagram of the contact member and the second sealing ring of the present invention.

[0018] Reference numerals in the drawings: 1 - submersible pump body, 2 - connecting cylinder, 3 - protection base, 4 - second U-shaped plate, 5 - second electric actuator, 6 - fixing ring, 7 - movable ring, 8 - blocking net, 9 - connecting rod, 10 - first U-shaped plate, 11 - first electric actuator, 12 - movable cylinder, 13 - filter screen, 14 - sealing piece, 15 - contact member, 16 - second sealing ring, 17 - limiting rod, 2001 - annular cavity, 2002 - linear chute, 2003 - diversion port, 2004 - first sealing ring, 1201 - diversion cavity, 1202 - water spray port, 1501 - annular bladder, 1502 - drain port, 1503 - water inlet, 1601 - limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0020] The first embodiment A submersible pump with a protection function, as shown in Figures 1 - 5 , includes a submersible pump body 1, a connecting cylinder 2 and a protection base 3; the lower part of the submersible pump body 1 is bolted to the protection base 3; a connecting cylinder 2 is detachably connected between the submersible pump body 1 and the protection base 3; It also includes a reciprocating unit, a net 8, a first U-shaped plate 10, a first electric actuator 11, a movable cylinder 12 and a filter screen 13; the connecting cylinder 2 is connected to the reciprocating unit; the bottom of the connecting cylinder 2 is fixedly connected with a net 8, and the net 8 is a flexible net; the net 8 is connected to the reciprocating unit; the bottom of the net 8 is connected to the protection base 3; an annular cavity 2001 is opened in the connecting cylinder 2; three annularly arrayed first U-shaped plates 10 are fixedly connected in the annular cavity 2001; three annularly arrayed first electric actuators 11 are installed in the connecting cylinder 2; the first electric actuator 11 is an electric push rod; each first electric actuator 11 corresponds to a first U-shaped plate 10; three annularly arrayed linear chutes 2002 are opened in the annular cavity 2001; the telescopic parts of all the first electric actuators 11 are fixedly connected with a movable cylinder 12 through sliding rods, and each sliding rod slides in a linear chute 2002; a plurality of equally spaced diversion openings 2003 are opened in the lower part of the annular cavity 2001; the diversion openings 2003 are all located outside the net 8; the movable cylinder 12 is located inside the net 8; the movable cylinder 12 is slidably connected to the connecting cylinder 2; a plurality of equally spaced filter screens 13 are installed in the annular cavity 2001; the movable cylinder 12 cooperates with all the filter screens 13.

[0021] The reciprocating unit includes a second U-shaped plate 4, a second electric actuator 5, a fixed ring 6, a movable ring 7 and a connecting rod 9; three annularly arrayed second U-shaped plates 4 are fixedly connected in the annular cavity 2001; each second U-shaped plate 4 is internally installed with a second electric actuator 5; the second electric actuator 5 is an electric push rod; the upper part of the net 8 is fixedly connected with a fixed ring 6; the lower part of the net 8 is fixedly connected with a movable ring 7; the fixed ring 6 is fixedly connected to the connecting cylinder 2; the telescopic part of each second electric actuator 5 is connected with a connecting rod 9; all the connecting rods 9 penetrate through the annular cavity 2001 and are slidably connected to the connecting cylinder 2; the lower parts of all the connecting rods 9 are fixedly connected with the movable ring 7; all the connecting rods 9 are located inside the net 8.

[0022] It also includes a sealing piece 14; a plurality of equally spaced sealing pieces 14 are connected in the annular cavity 2001; each sealing piece 14 corresponds to a diversion opening 2003.

[0023] The sealing piece 14 is made of rubber.

[0024] One side of the sealing piece 14 close to the filter screen 13 is fixedly connected to the bottom of the annular cavity 2001.

[0025] A first sealing ring 2004 is screwed on the upper part of the connecting cylinder 2.

[0026] A plurality of anti-slip grooves are annularly arrayed on the first sealing ring 2004.

[0027] The protection base 3 is annularly arrayed with gratings for intercepting aquatic animals and plants from entering the protection base 3.

[0028] The working steps of the above embodiment are: Before using the submersible pump, first connect the submersible pump body 1 to the water pipe, then hang the upper part of the submersible pump body 1 with a rope and lower it into the aquarium. When the submersible pump body 1 contacts the bottom of the aquarium, connect the submersible pump body 1 to the external power supply, control and start the submersible pump body 1, and the water in the aquarium enters the submersible pump body 1 through the protective base 3 and the connecting tube 2 in turn. The submersible pump body 1 pumps the water to the outside through the water pipe, wherein a grille is provided on the protective base 3 to intercept the animals and plants in the aquarium to avoid accidental injury to the animals and plants in the aquarium. The water in the aquarium passes through the grille of the protective base 3 and then enters the connecting tube 2. The screen 8 filters the passing water. This is mainly because some animals in the aquarium need to lay bottom sand in it to adapt and survive. The activities of the animals in the aquarium will cause the bottom sand to be lifted up, and the bottom sand will be drawn into the submersible pump body 1, causing the rotor of the submersible pump body 1 to wear, thereby generating vibration and noise and shortening the service life. The screen 8 is mainly set to intercept the lifted bottom sand and waste generated by the activities of animals in the aquarium, so as to fully protect the submersible pump.

[0029] After running for a period of time, a large amount of impurities are intercepted on the blocking net 8, and the three first electric actuators 11 are controlled to contract, synchronously driving the movable cylinder 12 to move downward until the bottom of the movable cylinder 12 contacts the protective base 3. At this time, the submersible pump body 1 is still working, and the movable cylinder 12 releases the blockage of the filter screen 13, and the movable cylinder 12 blocks the blocking net 8. Therefore, after water enters the protective base 3, it no longer directly enters the connecting cylinder 2, but enters the annular cavity 2001 through the diversion port 2003, and then enters the connecting cylinder 2 after passing through each filter screen 13. By changing the water flow path, the blocking net 8 is effectively avoided from being blocked by impurities, resulting in a decrease in the pumping efficiency of the submersible pump body 1, and the conversion of the water path Compared with the single-channel submersible pump, the maintenance frequency is significantly reduced. Manual maintenance is only required after the filter screen 13 is also blocked. At the same time, after the water flow path is changed, the three second electric actuators 5 are controlled to start contraction, and the connecting rod 9 is synchronously driven to move upward. All the connecting rods 9 jointly drive the movable ring 7 to move upward, thereby causing the flexible blocking net 8 to deform. After the second electric actuator 5 reaches the contraction limit, the three second electric actuators 5 are controlled to extend, and the connecting rod 9 and the parts thereon are synchronously driven to move downward, so that the blocking net 8 opens downward again. Therefore, by controlling the reciprocating extension and contraction of the second electric actuator 5, the expansion and contraction of the blocking net 8 is realized, and the impurities intercepted on the blocking net 8 are shaken off, completing the automatic cleaning of the blocking net 8.

[0030] Meanwhile, the diversion port 2003 is located outside the barrier net 8. When water flows through the diversion port 2003 into the annular cavity 2001, the sealing piece 14 flips upwards. The impurities shaken off from the barrier net 8 will enter the annular cavity 2001 along with the water flow. Then, when the water flow enters the connecting cylinder 2, the impurities in the water flow are intercepted by the filter screen 13. Then, since the self-cleaning of the barrier net 8 has been completed, all the first electric actuators 11 can be controlled to extend, synchronously driving the movable cylinder 12 to move upwards until the movable cylinder 12 is reset. The movable cylinder 12 blocks all the filter screens 13, and the water in the annular cavity 2001 can no longer enter the connecting cylinder 2 through the filter screens 13. At the same time, the sealing piece 14 is reset, and each sealing piece 14 blocks the corresponding diversion port 2003. Since one side of the sealing piece 14 close to the filter screen 13 is fixed to the bottom of the annular cavity 2001, when the water flow no longer flows through the filter screen 13, the impurities intercepted on the filter screen 13 fall under the action of gravity, and the impurities will only fall on the sealing piece 14, which is convenient for centralized treatment of the impurities in the later stage. After the cleaning of the barrier net 8 is completed, the water flow enters the connecting cylinder 2 again through the barrier net 8, thereby further prolonging the trouble-free operation time of the submersible pump and further reducing the frequency of manual maintenance, saving time and energy.

[0031] After the submersible pump has been running for a period of time, a large amount of impurities are also intercepted on the filter screen 13, resulting in the blockage of the filter screen 13. At this time, the operator only needs to lift the submersible pump upwards, and then unscrew the bolts fixed on the submersible pump body 1 and the protective base 3, and the submersible pump body 1, the connecting cylinder 2 and the protective base 3 can be separated. Then, by rotating the first sealing ring 2004 on the connecting cylinder 2, the first sealing ring 2004 is unscrewed from the connecting cylinder 2. Then, the inside of the annular cavity 2001 and the filter screen 13 are rinsed with water. After the cleaning is completed, the first sealing ring 2004 is screwed back onto the connecting cylinder 2, and the submersible pump body 1, the connecting cylinder 2 and the protective base 3 are reinstalled together, and then it can be put back into use.

[0032] The second embodiment On the basis of the first embodiment, according to Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown in the figure, it further includes a contact member 15, a second sealing ring 16 and a limiting rod 17; the protective base 3 is fixedly connected with the contact member 15, and a cavity is formed inside the contact member 15; a deformable annular bladder 1501 is provided on the contact member 15, and the annular bladder 1501 communicates with the cavity inside the contact member 15; an annular drain port 1502 is provided on the contact member 15, and the drain port 1502 communicates with the cavity inside the contact member 15; the drain port 1502 is located inside the annular bladder 1501; a flow dividing cavity 1201 is formed inside the movable cylinder 12, and an opening is provided at the lower part of the flow dividing cavity 1201; the lower part of the flow dividing cavity 1201 is matched with the drain port 1502; a plurality of water spray nozzles 1202 are formed on one side of the movable cylinder 12 facing the net 8; the flow dividing cavity 1201 communicates with all the water spray nozzles 1202; a plurality of water inlets 1503 are arranged in an annular array on the contact member 15, and the water inlets 1503 communicate with the cavity inside the contact member 15; a one-way valve is arranged in the water inlet 1503, and the one-way valve only allows the water in the connecting cylinder 2 to flow into the cavity inside the contact member 15; the drain port 1502 is slidably connected with the second sealing ring 16; a plurality of limiting grooves 1601 are formed in an annular array on the second sealing ring 16; a plurality of limiting rods 17 are fixedly connected in the drain port 1502; each limiting rod 17 is located in a limiting groove 1601 respectively.

[0033] A sealing rubber strip is arranged at the lower part of the movable cylinder 12 for sealing the contact position between the movable cylinder 12 and the contact member 15.

[0034] The working steps of the above embodiment are as follows: On the basis of the first embodiment, it is difficult to completely clean the impurities on the screen 8 only by deforming the screen 8, especially when the power of the submersible pump body 1 is large, the suction force on the water is stronger, causing the impurities to adhere more firmly to the screen 8. Simply deforming the screen 8 cannot fully remove them. At this time, a diverter chamber 1201 with a lower opening is opened in the movable cylinder 12. When the movable cylinder 12 is controlled to move downward, the diverter chamber 1201 is filled with water, and the lower opening of the diverter chamber 1201 is inserted into the drain port 1502. The sealing strip provided at the lower part of the movable cylinder 12, The movable cylinder 12 and the contact member 15 are in closer contact, and then when the control screen 8 is deformed, the movable ring 7 will reciprocate up and down. When the movable ring 7 moves downward, the movable ring 7 squeezes the annular capsule 1501, and the annular capsule 1501 is squeezed and deformed. The water in the cavity of the contact member 15 is squeezed out from the drain port 1502, and the second sealing ring 16 is pushed up. The cooperation of the limiting groove 1601 and the limiting rod 17 prevents the second sealing ring 16 from completely leaving the position of the drain port 1502. The water squeezed out from the drain port 1502 passes through the drain port 1 After the movable ring 7 is in contact with the contact member 15, the water in the diverter chamber 1201 is sprayed toward the screen 8 from each water spray port 1202. Since the screen 8 is in an open state when the movable ring 7 is in contact with the contact member 15, the impurities remaining on the screen 8 can be backwashed to reduce the impurities remaining on the screen 8. The size of the contact member 15 shown in the figure is for illustration only. In actual use, after the movable ring 7 is squeezed by the contact member 15, the water in the diverter chamber 1201 is sprayed toward the screen 8 from each water spray port 1202. The water sprayed out by 1202 is sufficient to effectively backwash the screen 8. Then, when the movable ring 7 moves upward, the movable ring 7 separates from the contact piece 15, the annular bag 1501 is restored, the negative pressure in the contact piece 15, and the second sealing ring 16 moves downward to block the drain port 1502. At the same time, the one-way valves of all the water inlets 1503 are opened, and the water in the connecting tube 2 enters the cavity in the contact piece 15 through the water inlet 1503. Therefore, when the movable ring 7 squeezes the contact piece 15 again, the screen 8 can be continuously backwashed, thereby effectively reducing the stubborn residual impurities in the screen 8.

[0035] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods will fall within the protection scope of the embodiments of the present invention.

Claims

1. A submersible pump with a protective function, comprising a submersible pump body (1); the submersible pump body (1) is connected with a protective base (3); a connecting cylinder (2) is detachably connected between the submersible pump body (1) and the protective base (3); characterized in that: The connecting cylinder (2) is connected with a reciprocating unit; the connecting cylinder (2) is fixedly connected with a retaining net (8), and the retaining net (8) is a flexible net; the retaining net (8) is connected with the reciprocating unit; the reciprocating unit is used to drive the deformation of the retaining net (8) to clean the retaining net (8); the bottom of the retaining net (8) is connected with the protective base (3); an annular cavity (2001) is opened in the connecting cylinder (2); three first U-shaped plates (10) are fixedly connected in the annular cavity (2001); three first electric actuators (11) are installed in the connecting cylinder (2); each first electric actuator (11) corresponds to a first U-shaped plate (10); three linear chutes (2002) are opened in the annular cavity (2001); the telescopic parts of all the first electric actuators (11) are fixedly connected with a movable cylinder (12) through sliding rods, and each sliding rod slides in a linear chute (2002); a plurality of diversion openings (2003) are opened in the lower part of the annular cavity (2001); the diversion openings (2003) are all located outside the retaining net (8); the movable cylinder (12) is located inside the retaining net (8); the movable cylinder (12) is slidably connected with the connecting cylinder (2); a plurality of filter meshes (13) are installed in the annular cavity (2001); the movable cylinder (12) cooperates with all the filter meshes (13), and the movable cylinder (12) is used to block all the filter meshes (13).

2. The submersible pump with a protection function according to claim 1, characterized in that: The reciprocating unit includes a second U-shaped plate (4); three second U-shaped plates (4) are fixedly connected in the annular cavity (2001); each second U-shaped plate (4) is internally installed with a second electric actuator (5); a fixed ring (6) is fixedly connected to the upper part of the retaining net (8); a movable ring (7) is fixedly connected to the lower part of the retaining net (8); the fixed ring (6) is fixedly connected with the connecting cylinder (2); the telescopic part of each second electric actuator (5) is connected with a connecting rod (9); all the connecting rods (9) penetrate through the annular cavity (2001) and are slidably connected with the connecting cylinder (2); all the connecting rods (9) are fixedly connected with the movable ring (7); all the connecting rods (9) are located inside the retaining net (8).

3. The submersible pump with a protection function according to claim 2, wherein: It also includes a plurality of sealing sheets (14) connected in the annular cavity (2001); each sealing sheet (14) corresponds to a diversion opening (2003).

4. The submersible pump with a protection function according to claim 3, characterized in that: The sealing sheet (14) is made of rubber material.

5. The submersible pump with a protection function according to claim 4, wherein: One side of the sealing sheet (14) close to the filter mesh (13) is fixedly connected with the bottom of the annular cavity (2001).

6. The submersible pump with a protection function according to claim 5, characterized in that: The connecting cylinder (2) is screwed with a first sealing ring (2004), and the first sealing ring (2004) is used to block the annular cavity (2001).

7. The submersible pump with a protection function according to claim 6, characterized in that: A plurality of anti-slip grooves are annularly arranged on the first sealing ring (2004), which is convenient for removing the first sealing ring (2004) from the annular cavity (2001).

8. A submersible pump with a protection function according to any one of claims 1-7, characterized in that: The protective base (3) is provided with a grille in an annular array.

9. The submersible pump with a protection function according to claim 8, characterized in that: It further includes a contact member (15) fixedly connected to the protective base (3), and a cavity is formed inside the contact member (15); a deformable annular bladder (1501) is provided on the contact member (15), and the annular bladder (1501) communicates with the cavity inside the contact member (15); an annular drain port (1502) is provided on the contact member (15), and the drain port (1502) communicates with the cavity inside the contact member (15); the drain port (1502) is located inside the annular bladder (1501); a diversion cavity (1201) is formed inside the movable cylinder (12), and an opening is provided at the lower part of the diversion cavity (1201); the diversion cavity (1201) cooperates with the drain port (1502); a plurality of water spray nozzles (1202) are formed on one side of the movable cylinder (12) facing the net (8); the diversion cavity (1201) communicates with all the water spray nozzles (1202); a plurality of water inlets (1503) are provided on the contact member (15), and the water inlets (1503) communicate with the cavity inside the contact member (15); a one-way valve is provided inside the water inlet (1503), and the one-way valve only allows the water flow inside the connecting cylinder (2) to flow into the cavity inside the contact member (15); a second sealing ring (16) is slidably connected to the drain port (1502); a plurality of limiting grooves (1601) are formed on the second sealing ring (16); a plurality of limiting rods (17) are fixedly connected inside the drain port (1502); each limiting rod (17) is located in one limiting groove (1601).

10. A submersible pump with a protection function according to claim 9, characterized in that: A sealing rubber strip is provided at the lower part of the movable cylinder (12).

Images