Submersible pump

Abstract

The invention relates to the field of pump shells, in particular to a submersible pump which comprises a pump shell, an impeller, a motor and a sealing cylinder, the pump shell is provided with a water inlet and a water outlet, a power cavity is formed in the inner wall of the water inlet, the sealing cylinder is connected to the inner cavity wall of the pump shell and provided with a sealing cavity, and the end of a motor shaft of the motor penetrates through the inner wall of the sealing cavity and is coaxially connected to a rotating shaft of the impeller. A plurality of heat dissipation cavities are formed in the surface of the sealing cylinder at intervals and surround the sealing cavity, and a drainage runner is formed in the end face, facing the water outlet, of the sealing cylinder and communicates with the water outlet and the heat dissipation cavities. Through the arrangement of the sealing cylinder and the heat dissipation cavity, water in the heat dissipation cavity makes full contact with the inner wall of the heat dissipation cavity for heat exchange, cooling in the heat dissipation cavity is achieved, the stability of heat exchange between the motor and the inner wall of the sealing cavity is guaranteed, cooling of the motor is achieved, and the motor is not prone to being damaged due to long-time operation in a high-temperature state; therefore, the service life of the submersible pump is prolonged.

Description

Technical Field

[0001] The present application relates to the field of pump casings, and in particular to a submersible pump. Background Art

[0002] A submersible pump is a type of pump that can be embedded in water to work. It is mainly used to pump water or transport liquids. A submersible pump mainly includes a pump casing, a motor and an impeller. The pump casing has a water inlet and a water outlet. The motor seal is installed on the inner wall of the pump casing. The motor shaft is coaxially fixed on the impeller rotating shaft. The motor drives the impeller to rotate at high speed, pushing the liquid into the inner cavity of the pump casing from the water inlet and discharged from the water outlet.

[0003] When the motor runs for a long time, the motor converts part of the electrical energy into heat energy, causing the motor to run in a high temperature state for a long time and wear out, thereby shortening the service life of the submersible pump. Summary of the invention

[0004] In order to improve the problem of service life of a submersible pump, the present application provides a submersible pump.

[0005] The present application provides a submersible pump, which adopts the following technical solution: A submersible pump comprises a pump casing, an impeller, a motor and a sealing cylinder, wherein the pump casing has a water inlet and a water outlet, the inner wall of the water inlet is provided with a power cavity for rotating the impeller, the sealing cylinder is connected to the inner cavity wall of the pump casing, the sealing cylinder has a sealing cavity for installing the motor, the end of the motor shaft of the motor passes through the inner wall of the sealing cavity and is coaxially connected to the impeller rotating shaft, a plurality of heat dissipation cavities are spaced apart on the surface of the sealing cylinder facing the power cavity, a plurality of the heat dissipation cavities surround the sealing cavity, a drainage channel is provided on the end surface of the sealing cylinder facing the water outlet, the drainage channel connects the water outlet and a plurality of heat dissipation cavities, when the motor drives the impeller to rotate, water passes through the power cavity, the heat dissipation cavity and the drainage channel in sequence through the water inlet and is discharged from the water outlet.

[0006] By adopting the above technical scheme, the motor is installed on the inner wall of the sealing cavity, the inner wall of the sealing cavity abuts against the outer peripheral surface of the motor to form a seal, the end of the motor shaft passes through the inner wall of the sealing cavity and is coaxially connected to the impeller rotating shaft, so as to realize the sealed installation of the motor and ensure that the motor is not easily damaged by contact with water flow; when the submersible pump is in use, the motor drives the impeller to rotate, and a negative pressure is formed in the power cavity, which pushes the water from the water inlet to pass through the power cavity, the heat dissipation cavity and the drainage channel in sequence and is discharged from the water outlet. The motor converts part of the electrical energy into thermal energy during long-term operation, and transfers part of the thermal energy to the inner wall of the sealing cavity when the motor heats up. Multiple heat dissipation cavities surround the sealing cavity, and the water in the heat dissipation cavity fully contacts the inner wall of the heat dissipation cavity for heat exchange, thereby realizing cooling in the heat dissipation cavity, ensuring the stability of heat exchange between the motor and the inner wall of the sealing cavity, realizing cooling of the motor, and making it difficult for the motor to be damaged by running in a high temperature state for a long time, thereby extending the service life of the submersible pump.

[0007] Optionally, a plurality of heat dissipation gaps are left between the outer circumferential surface of the sealing cylinder and the inner wall of the pump casing, and a cooling cavity is provided on the surface of the pump casing close to the sealing cylinder, and the cooling cavity penetrates the surface of the pump casing and is connected to the heat dissipation gaps.

[0008] By adopting the above technical scheme, a plurality of heat dissipation gaps surround the outer peripheral surface of the sealing cylinder, and the cooling cavity penetrates the surface of the pump casing and is connected to the heat dissipation gaps. Water enters the heat dissipation gaps through the cooling cavity. The water in the heat dissipation gaps fully contacts the outer peripheral surface of the sealing cylinder and performs heat exchange, so that the sealing cylinder is not easily heated up, thereby achieving cooling of the sealing cylinder and further improving the heat dissipation efficiency of the motor.

[0009] Optionally, the sealing cylinder includes a cover body, a barrel body and multiple locking assemblies, the sealing cavity and the heat dissipation cavity are located on the barrel body, the drainage channel is located on the cover body, and multiple locking assemblies are connected between the cover body and the barrel body at intervals. The locking assemblies can seal and fix the cover body on the barrel body and close the sealing cavity.

[0010] By adopting the above technical solution, multiple locking assemblies seal the cover body on the barrel body and close the sealing cavity, thereby realizing detachable installation of the cover body and the barrel body, thereby facilitating the user to repair and replace the motor in the sealing cavity without replacing the entire submersible pump, thereby reducing the cost of using the submersible pump.

[0011] Optionally, the locking assembly includes a flange block 1, a flange block 2, a sliding block, a locking block and a plurality of fixing bolts, the flange block 1 is connected to the surface of the cover body close to the barrel body, the flange block 2 is connected to the surface of the barrel body close to the cover body, the surface of the flange block 1 is provided with a plurality of threaded holes 1 for the ends of the fixing bolts to pass through, the arrangement direction of the threaded holes 1 and the length direction of the flange block 1 are parallel to each other, the surface of the flange block 2 is provided with a plurality of threaded holes 2 for the ends of the fixing bolts to be embedded in one by one, and the ends of the fixing bolts are passed through A threaded hole is provided and screwed together to be fixed on the inner wall of the threaded hole two to form a fixation. A sliding cavity for the sliding block to slide is provided on the surface of the flange block two. The locking block is connected to the surface of the sliding block facing the flange block one. A locking cavity for the locking block to be embedded is provided on the surface of the flange block one. The locking cavity is connected to the sliding cavity. When the sliding block slides along the inner wall of the sliding cavity toward the barrel body, the locking block is embedded in the locking cavity. The surface of the locking block presses against the inner wall of the locking cavity to form a limit, and the end face of the locking block is flush with the surface of the flange block one.

[0012] By adopting the above technical scheme, when the surface of the cover body covers the surface of the barrel body and closes the sealed cavity, the threaded hole one corresponds to and is connected with the threaded hole two, and the sliding cavity is connected with the locking cavity, driving the sliding block to slide along the inner wall of the sliding cavity toward the barrel body, and the end of the locking block is embedded in the locking cavity, and the surface of the locking block is pressed against the inner wall of the locking cavity to form a limit, so that the cover body is not easy to shift on the barrel body, thereby realizing the initial fixation of the cover body on the barrel body. At the same time, the threaded hole one corresponds to and is connected with the threaded hole two, and the end of the fixing bolt passes through the threaded hole one and is screwed and fixed to the inner wall of the threaded hole two to realize the detachable fixation between the cover body and the barrel body, thereby facilitating the maintenance and replacement of the motor in the sealed cavity.

[0013] Optionally, the locking assembly also includes an elastic member 1, one end of the elastic member 1 in the elastic force direction is connected to the inner wall of the sliding cavity, and the other end of the elastic member 1 in the elastic force direction is connected to the surface of the sliding block. The elastic member 1 has an elastic force that drives the sliding block to slide toward the direction close to the barrel body, and the locking block tends to be embedded in the locking cavity.

[0014] By adopting the above technical scheme, when the cover body and the barrel body are installed, the sliding block is driven to overcome the elastic force of the elastic member and slide along the inner wall of the sliding cavity in a direction away from the barrel body. The locking block protrudes from the two end faces of the flange block. When the surface of the cover body covers the surface of the barrel body and closes the sealing cavity, the sliding cavity is connected to the locking cavity. The sliding block is released, and the elastic force of the elastic member drives the sliding block to slide along the inner wall of the sliding cavity in a direction close to the barrel body. The locking block is embedded in the locking cavity, and the outer wall of the locking block presses against the inner wall of the locking cavity to form a limit, so that the sliding block is not easy to deviate on the inner wall of the sliding cavity, thereby improving the limit stability of the locking block in the locking cavity.

[0015] Optionally, the locking assembly also includes a positioning plate and multiple positioning rings, the positioning plate surface is provided with multiple rotating cavities for the ends of the fixing bolts to rotate, the positioning rings correspond to the rotating cavities one by one and are coaxially connected to the inner wall of the rotating cavity, the outer peripheral surface of the fixing bolt is provided with a limiting ring groove for the positioning ring to be embedded, and one end surface of the flange block is provided with a positioning cavity for the positioning plate to be embedded, when the end of the fixing bolt is passed through the threaded hole one and is threadedly tightened and fixed in the threaded hole two, the positioning plate is embedded in the positioning cavity, and the surface of the positioning plate is flush with the surface of the flange block.

[0016] By adopting the above technical scheme, the outer ring of the positioning ring is coaxially fixed on the inner wall of the rotating cavity, and the inner ring of the positioning ring is embedded in the limiting ring groove, so as to realize the rotational connection of the fixing bolt on the positioning plate. When the end of the fixing bolt is passed through the threaded hole one and is screwed and fixed on the inner wall of the second threaded hole, the positioning plate is driven close to the flange block and embedded in the positioning cavity, and the surface of the positioning plate is flush with the surface of the flange block, so that the staff can directly judge the tightening condition of the fixing bolt by the flush state of the end face of the positioning plate and the surface of the flange block, thereby improving the maintenance convenience of the submersible pump.

[0017] Optionally, the locking assembly also includes a locking rod, the end of which is connected to the end face of the positioning plate facing flange block one, and the inner wall of the positioning cavity is provided with a slideway for the locking rod to slide, and the sliding direction of the locking rod and the height direction of flange block one are parallel to each other.

[0018] By adopting the above technical solution, when the end of the fixing bolt is embedded in the threaded hole one, the end of the locking rod is embedded in the slide, and the end of the fixing bolt is driven to pass through the threaded hole one and is screwed and fixed on the inner wall of the threaded hole two, the locking rod is driven to slide along the inner wall of the slide, so that the positioning plate is not easily offset when it is close to the flange block, thereby improving the stability of the positioning plate embedded in the positioning cavity.

[0019] Optionally, the slide passes through a surface of the flange block in a direction close to the second flange block, and a locking groove is provided on the end face of the second flange block facing the slide for the end of the locking rod to be embedded in, and the locking groove is connected to the sliding cavity, and a positioning groove is provided on the surface of the sliding block facing the locking groove for the locking rod to slide, and the positioning groove passes through the outer wall of the sliding block, and the locking rod surface is provided with a sliding groove for the sliding block to slide, and the sliding groove passes through the locking rod surface, when the end of the locking block protrudes out of the second end face of the flange block, the positioning groove is connected to the locking groove, and the end of the locking rod is sequentially passed through the slide and the positioning groove and embedded in the locking groove, the surface of the positioning plate is flush with an end face of the flange block, the sliding groove is connected to the sliding cavity, and the elastic force of the elastic member drives the sliding block to slide along the inner wall of the sliding groove toward the direction close to the barrel body.

[0020] By adopting the above technical scheme, when the cover body and the barrel body are installed, the sliding block is driven to overcome the elastic force of the elastic member and slide along the inner wall of the sliding cavity in a direction away from the barrel body, the end of the locking block protrudes from the second end surface of the flange block, the positioning groove is connected to the locking groove, and the end of the fixing bolt is driven to pass through the threaded hole and is threadedly tightened and fixed on the second inner wall of the threaded hole, the positioning plate receives the power of the fixing bolt and drives the end of the locking rod to pass through the slideway and the positioning groove in sequence and embed into the locking groove, and the surface of the positioning plate is flush with an end surface of the flange block; at the same time, the sliding groove is connected to the sliding cavity, and the elastic force of the elastic member drives the sliding block to slide along the inner wall of the sliding groove in a direction close to the barrel body, the locking block is embedded in the locking cavity to form a limit, and restricts the locking rod from sliding on the inner wall of the slideway, thereby improving the sealing stability between the cover body and the barrel body.

[0021] Optionally, the locking assembly also includes a positioning bar, which is slidably connected to the inner wall of the locking groove. When the positioning groove is connected to the locking groove, the end of the positioning bar is driven along the inner wall of the locking groove to approach the sliding block and embed into the positioning groove, and the outer wall of the positioning bar abuts the inner wall of the positioning groove and limits the sliding block from sliding.

[0022] By adopting the above technical solution, when the sliding block is driven to slide along the inner wall of the sliding cavity toward the direction away from the barrel body, the positioning groove is connected to the locking groove, driving the positioning bar to slide along the inner wall of the locking groove toward the direction close to the sliding block and embed into the positioning groove, and the outer wall of the positioning bar abuts against the inner wall of the positioning groove and limits the sliding block to slide on the inner wall of the sliding cavity, so that the user does not need to apply force to the sliding block all the time when installing the cover body, thereby improving the installation efficiency of the submersible pump.

[0023] Optionally, the locking assembly also includes an elastic member 2, one end of the elastic member 2 in the elastic force direction is connected to the surface of the positioning bar, and the other end of the elastic member 2 in the elastic force direction is connected to the inner wall of the locking groove. The elastic member 2 has the elastic force to drive the positioning bar to slide toward the direction close to the sliding block and drive the end of the positioning bar to embed into the positioning groove.

[0024] By adopting the above technical solution, when the positioning groove is connected to the locking groove, the elastic force of the second elastic member drives the positioning bar to slide along the inner wall of the locking groove toward the sliding block, and the end of the positioning bar is embedded in the inner wall of the positioning groove. There is no need for the user to manually control the sliding of the positioning bar, thereby achieving directional sliding of the positioning bar, thereby further improving the installation efficiency of the submersible pump.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the sealing cylinder and the heat dissipation cavity, the water in the heat dissipation cavity is in full contact with the inner wall of the heat dissipation cavity for heat exchange, so as to realize the cooling of the heat dissipation cavity, ensure the stability of the heat exchange between the motor and the inner wall of the sealing cavity, realize the cooling of the motor, and make the motor not easy to be damaged by running in a high temperature state for a long time, thereby extending the service life of the submersible pump; 2. The setting of the heat dissipation gap, the water in the heat dissipation gap is in full contact with the outer peripheral surface of the sealing cylinder and performs heat exchange, so that the sealing cylinder is not easy to heat up, the sealing cylinder is cooled down, and the heat dissipation efficiency of the motor is further improved; 3. The arrangement of the cover body, barrel body and locking assembly facilitates the user to repair and replace the motor in the sealed chamber without replacing the entire submersible pump, thereby reducing the use cost of the submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a partial cross-sectional view in the embodiment of the present application, mainly showing the heat dissipation cavity.

[0028] Figure 3 It is a cross-sectional view of flange block 1 and flange block 2 in the embodiment of the present application, mainly showing the locking groove.

[0029] Figure 4It is a schematic diagram of the local structure of the locking assembly in the embodiment of the present application, mainly showing the sliding groove.

[0030] Description of the accompanying drawings: 1. pump housing; 11. water inlet; 12. water outlet; 13. power chamber; 14. heat dissipation gap; 15. cooling chamber; 2. impeller; 3. motor; 4. sealing cylinder; 41. cover body; 411. drainage channel; 412. sealing ring groove 1; 413. closed ring groove 1; 42. sealing ring 1; 43. sealing ring 2; 44. barrel body; 441. sealing chamber; 442. avoidance hole; 443. heat dissipation chamber; 444. sealing ring groove 2; 445. closed ring groove 2; 45. locking assembly; 451. flange block 1; 45 11. Threaded hole one; 4512. Locking cavity; 4513. Positioning cavity; 4514. Slideway; 452. Flange block two; 4521. Threaded hole two; 4522. Sliding cavity; 4523. Locking groove; 453. Sliding block; 4531. Positioning groove; 454. Elastic part one; 455. Positioning plate; 4551. Rotating cavity; 456. Locking block; 457. Locking rod; 4571. Sliding groove; 458. Positioning strip; 459. Elastic part two; 4510. Positioning ring; 4515. Fixing bolt; 4516. Limiting ring groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application embodiment discloses a submersible pump. Figure 1 and Figure 2A submersible pump comprises a pump casing 1, an impeller 2, a motor 3 and a sealing cylinder 4. In the embodiment of the present application, the pump casing 1 is a cylinder, the pump casing 1 has a water inlet 11 and a water outlet 12, the water inlet 11 and the water outlet 12 are located at both ends of the axial direction of the pump casing 1, the inner wall of the water inlet 11 is provided with a power chamber 13 for the rotation of the impeller 2, the rotation axis of the impeller 2 and the axis of the pump casing 1 are parallel to each other, the sealing cylinder 4 is fixed to the inner cavity wall of the pump casing 1, the axis of the sealing cylinder 4 and the axis of the pump casing 1 are parallel to each other, the sealing cylinder 4 is located between the water outlet 12 and the power chamber 13, the sealing cylinder 4 has a sealing chamber 441 in which the power supply machine 3 is embedded, the inner wall of the sealing chamber 441 abuts against the outer peripheral surface of the motor 3 to form a seal, the axis of the motor 3 and the axis of the sealing cylinder 4 coincide with each other, the end face of the sealing cylinder 4 facing the rotating axis of the impeller 2 is provided with a avoidance hole 442 through which the shaft end of the power supply machine 3 is penetrated, the shaft end of the motor 3 An avoidance hole 442 is penetrated in the part and coaxially fixed on the rotating shaft of the impeller 2. A plurality of heat dissipation chambers 443 are spaced apart on the end face of the sealing cylinder 4 facing the power chamber 13. The heat dissipation chambers 443 are evenly spaced around the axis of the sealing cylinder 4. A drainage channel 411 is opened on the end face of the sealing cylinder 4 facing the water outlet 12. The drainage channel 411 connects the water outlet 12 and the plurality of heat dissipation chambers 443. When the motor 3 drives the impeller 2 to rotate, water is pushed through the water inlet 11 to pass through the power chamber 13, the heat dissipation chamber 443 and the drainage channel 411 in sequence and is discharged from the water outlet 12. The water in the heat dissipation chamber 443 fully contacts the inner wall of the heat dissipation chamber 443 and exchanges heat, thereby cooling the sealing cylinder 4 and ensuring that the motor 3 stably transfers heat energy to the sealing cylinder 4, so that the motor 3 is not easily damaged by running in a high temperature state for a long time, thereby extending the service life of the submersible pump.

[0033] Reference Figure 1 and Figure 2 A plurality of heat dissipation gaps 14 are left between the outer circumferential surface of the sealing cylinder 4 and the inner wall of the pump casing 1. The plurality of heat dissipation gaps 14 are evenly distributed around the axis of the sealing cylinder 4. A cooling cavity 15 is provided on the surface of the pump casing 1 close to the sealing cylinder 4. The cooling cavity 15 penetrates the outer wall of the pump casing 1 in the direction close to the axis of the pump casing 1 and is connected to the heat dissipation gap 14. When the submersible pump is immersed in water, water enters the heat dissipation gap 14 through the cooling cavity 15. The water in the heat dissipation gap 14 fully contacts the outer wall of the sealing cylinder 4 and performs heat exchange, thereby improving the cooling efficiency of the sealing cylinder 4, thereby improving the cooling performance of the submersible pump.

[0034] Reference Figure 2 and Figure 3The sealing cylinder 4 includes a cover body 41, a sealing ring 1 42, a sealing ring 2 43, a barrel body 44 and multiple locking components 45. The sealing cavity 441, the avoidance hole 442 and the heat dissipation cavity 443 are all located on the barrel body 44. The drainage channel 411 is located on the cover body 41. Multiple locking components 45 are connected between the cover body 41 and the barrel body 44 at intervals. The multiple locking components 45 are evenly distributed around the axis of the barrel body 44. The locking components 45 can seal and fix the cover body 41 on the end face of the barrel body 44 and close the sealing cavity 441, thereby realizing the detachable installation between the cover body 41 and the barrel body 44, which is convenient for users to repair and replace the motor 3 in the sealing cavity 441 without replacing the entire submersible pump, thereby reducing the use cost of the submersible pump.

[0035] Reference Figure 2 and Figure 3 The locking assembly 45 includes a flange block 451, a flange block 452, a sliding block 453, an elastic member 454, a positioning plate 455, a locking block 456, a locking rod 457, a positioning bar 458, an elastic member 459, a plurality of positioning rings 4510 and a plurality of fixing bolts 4515. The flange block 451 is integrally formed and fixed on the surface of the cover body 41 facing the barrel body 44. The flange block 452 is integrally formed and fixed on the surface of the barrel body 44 facing the cover body 41. The number of fixing bolts 4515 can be one, two or more. In the embodiment of the present application, the number of fixing bolts 4515 is two. Two threaded holes 4511 for the ends of the fixing bolts 4515 to pass through are provided on the surface of the flange block 451 at intervals. The arrangement direction of the threaded holes 4511 and the flange The length directions of the flange block 451 are parallel to each other, the axis of the threaded hole 4511 and the axis of the barrel body 44 are parallel to each other, the threaded hole 4511 passes through the surface of the flange block 451 along its own axis, and the surface of the flange block 452 is provided with two threaded holes 4521 for the ends of the fixing bolts 4515 to be embedded, and the axis of the threaded hole 4521 and the axis of the barrel body 44 are parallel to each other. When the surface of the cover body 41 abuts against the surface of the barrel body 44 and the cover body 41 seals the cavity 441, the threaded hole 4511 corresponds to the threaded hole 4521 one by one and is connected, the end of the fixing bolt 4515 passes through the threaded hole 4511 and is screwed and fixed to the inner wall of the threaded hole 4521 to form a fixation, so that the cover body 41 is not easy to separate from the barrel body 44, thereby realizing the sealing installation and fixation between the cover body 41 and the barrel body 44.

[0036] Reference Figure 2 and Figure 3The surface of the second flange block 452 facing away from the barrel body 44 is provided with a sliding cavity 4522 for the sliding block 453 to slide, the sliding direction of the sliding block 453 and the width direction of the flange block 1 451 are parallel to each other, the sliding cavity 4522 is located between the two threaded holes 4521, the locking block 456 is connected to the end surface of the sliding block 453 facing the flange block 1 451, and the surface of the flange block 1 451 facing the locking block 456 is provided with a locking cavity 4512 for the locking block 456 to be embedded, the elastic member 1 454 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 1 454 is a compression spring with a certain deformation ability. One end of the elastic member 1 454 in the elastic force direction is connected to the inner wall of the sliding cavity 4522, and the other end of the elastic member 1 454 in the elastic force direction is connected to the surface of the sliding block 453. When the cover body 41 and the barrel body 44 are installed, the sliding block 453 is driven to overcome The elastic force of the elastic member 1 454 slides along the inner wall of the sliding cavity 4522 in the direction away from the barrel body 44, and the locking block 456 protrudes from the end surface of the flange block 2 452. When the end of the fixing bolt 4515 passes through the threaded hole 1 4511 and is screwed and fixed on the inner wall of the threaded hole 2 4521, the locking cavity 4512 is connected to the sliding cavity 4522, and the sliding block 453 is loosened. The elastic force of the elastic member 1 454 drives the sliding block 453 along the sliding cavity 452 2 The inner wall of the flange block 451 slides toward the direction close to the barrel body 44, the pressing block is embedded in the locking cavity 4512, the outer wall of the pressing block presses against the inner wall of the locking cavity 4512 to be fixed, the surface of the pressing block is flush with the surface of the flange block 1 451, and the end face of the sliding block 453 is flush with the surface of the flange block 2 452, so that the pressing block and the sliding block 453 are not easily affected by external impact and slide, thereby improving the pressing force between the flange block 1 451 and the flange block 2 452.

[0037] Reference Figure 3 and Figure 4 The positioning plate 455 is provided with two rotating cavities 4551 for the ends of the fixing bolts 4515 to be embedded in the plate surface, and the rotating cavities 4551 pass through both sides of the positioning plate 455. The number of positioning rings 4510 can be one, two or more. In the embodiment of the present application, the number of positioning rings 4510 is two, and the positioning rings 4510 correspond to the rotating cavities 4551 one by one. The outer ring wall of the positioning ring 4510 is coaxially fixed to the inner wall of the rotating cavity 4551. The outer peripheral surface of the fixing bolt 4515 is coaxially provided with a limiting ring groove 4516 for the inner ring of the positioning ring 4510 to be embedded in. The inner wall of the limiting ring groove 4516 abuts against the inner wall of the positioning ring 4510 to form a limit, thereby realizing the rotation connection of the fixing bolt 4515 on the positioning plate 455.

[0038] Reference Figure 2 and Figure 3The end surface of the flange block 451 is provided with a positioning cavity 4513 for the positioning plate 455 to be embedded in. The positioning cavity 4513 is connected to the two threaded holes 4511. When the end of the fixing bolt 4515 passes through the threaded hole 4511 and is screwed and fixed in the threaded hole 4521, the positioning plate 455 is driven to be embedded in the positioning cavity 4513, and the surface of the positioning plate 455 is flush with the end surface of the flange block 451, so that the user can directly judge the tightening condition of the fixing bolt 4515 according to the flush state of the surface of the positioning plate 455 and the surface of the flange block 451, thereby improving the installation efficiency of the submersible pump.

[0039] Reference Figure 3 and Figure 4 The end of the locking rod 457 is integrally formed and fixed to the end face of the positioning plate 455 facing the flange block 1 451, the locking rod 457 is located between the two fixing bolts 4515, the axis of the locking rod 457 and the axis of the fixing bolt 4515 are parallel to each other, and the bottom wall of the positioning cavity 4513 is provided with a slideway 4514 for the sliding movement of the locking rod 457, the slideway 4514 penetrates the end face of the flange block 1 451 in the direction close to the flange block 2 452, and the end face of the flange block 2 452 facing the sliding A locking groove 4523 is provided for the end of the locking rod 457 to be embedded, and the locking groove 4523 is connected to the sliding cavity 4522. A positioning groove 4531 is provided on the surface of the sliding block 453 facing the locking groove 4523 for the locking rod 457 to slide, and the positioning groove 4531 passes through both sides of the sliding block 453. A sliding groove 4571 is provided on the surface of the locking rod 457 facing the sliding cavity 4522 for the sliding block 453 to slide, and the sliding groove 4571 passes through both sides of the locking rod 457.

[0040] Reference Figure 3 and Figure 4 The positioning strip 458 is slidably connected to the inner wall of the locking groove 4523, and the sliding direction of the positioning strip 458 and the sliding direction of the locking rod 457 are parallel to each other. The elastic member 459 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 459 is a compression spring with a certain deformation ability. One end of the elastic member 459 in the elastic direction is connected to the inner wall of the locking groove 4523, and the other end of the elastic member 459 in the elastic direction is connected to the surface of the positioning strip 458. The elastic member 459 has an elastic force to drive the positioning strip 458 to slide in the direction close to the positioning groove 4531. The end of the positioning strip 458 is embedded in the positioning groove 4531, and the locking block 456 tends to protrude from the end surface of the flange block 452.

[0041] Reference Figure 2 and Figure 3When the end face of the cover body 41 covers the end face of the barrel body 44 and closes the sealing cavity 441, the threaded hole 1 4511 corresponds to the threaded hole 2 4521 and is connected. When the end of the fixing bolt 4515 passes through the threaded hole 1 4511 and is screwed and fixed in the threaded hole 2 4521, the positioning plate 455 receives the power of the fixing bolt 4515 and pushes the end of the locking rod 457 to pass through the slideway 4514 and abut against the end face of the positioning strip 458. The rod face of the locking rod 457 squeezes the surface of the positioning strip 458 and drives the positioning strip 458 to slide in the direction close to the locking groove 4523. The end of the positioning strip 458 is separated from the positioning groove 4531, and the sliding groove 4571 is connected to the positioning groove 4531. , the limiting effect of the positioning strip 458 on the sliding block 453 disappears, and the elastic force of the elastic member 454 drives the sliding block 453 to slide along the inner wall of the sliding groove 4571 toward the barrel body 44, and the communication effect between the sliding groove 4571 and the positioning groove 4531 disappears, and the limiting locking rod 457 slides on the inner wall of the slideway 4514, thereby improving the limiting stability of the positioning plate 455 in the positioning cavity 4513; at the same time, the locking block 456 is embedded in the locking cavity 4512, and the outer wall of the locking block 456 is pressed against the inner wall of the locking cavity 4512 to form a limit, so that the flange block 451 is not easy to separate from the flange block 452, thereby improving the sealing stability between the cover body 41 and the barrel body 44.

[0042] Reference Figure 2 The materials of the sealing ring 1 42 and the sealing ring 2 43 can be rubber or silicone. In the embodiment of the present application, the materials of the sealing ring 1 42 and the sealing ring 2 43 are rubber, which has a certain deformation ability. The end surface of the cover body 41 facing the barrel body 44 is coaxially provided with a sealing ring groove 1 412 for the sealing ring 1 42 to be embedded. The end surface of the barrel body 44 facing the cover body 41 is coaxially provided with a sealing ring groove 2 444 for the sealing ring 1 42 to be embedded. The sealing ring groove 2 444 is located between the sealing cavity 441 and the heat dissipation cavity 443. The end surface of the cover body 41 facing the barrel body 44 is coaxially provided with a closed ring groove 1 413 for the sealing ring 2 43 to be embedded. The end surface of the barrel body 44 facing the cover body 41 is coaxially provided with a closed ring groove 2 445 for the sealing ring 2 43 to be embedded. The closed ring groove 445 and the sealing ring groove 1 412 are located on both sides of the heat dissipation cavity 443. When the cover body 41 is sealed and fixed on the barrel body 44 through the locking assembly 45 and covers the sealing cavity 441, the inner wall of the sealing ring groove 1 412 and the inner wall of the sealing ring groove 2 444 are pressed against both sides of the sealing ring 1 42 to form a seal, and the inner wall of the closed ring groove 1 413 and the inner wall of the closed ring groove 2 445 are pressed against both sides of the sealing ring 2 43 to form a seal, so that the liquid in the heat dissipation cavity 443 is not easy to enter the sealing cavity 441 from the pressing point between the cover body 41 and the barrel body 44 to interfere with the stability of the motor 3, and ensure that the liquid in the heat dissipation cavity 443 is stably discharged from the water outlet 12 through the drainage channel 411, thereby improving the stability of the operation of the submersible pump and extending the service life of the submersible pump.

[0043] The implementation principle of a submersible pump in an embodiment of the present application is as follows: when the motor 3 drives the impeller 2 to rotate, water is pushed through the water inlet 11 to pass through the power chamber 13, the heat dissipation chamber 443 and the drainage channel 411 in sequence and discharged from the water outlet 12. The water in the heat dissipation chamber 443 is in full contact with the inner wall of the heat dissipation chamber 443 and performs heat exchange, thereby achieving cooling of the sealing cylinder 4, ensuring that the motor 3 stably transfers heat energy to the sealing cylinder 4, and preventing the motor 3 from being damaged by running in a high temperature state for a long time, thereby extending the service life of the submersible pump.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A submersible pump, characterized in that: The invention comprises a pump casing (1), an impeller (2), a motor (3) and a sealing cylinder (4), wherein the pump casing (1) has a water inlet (11) and a water outlet (12), the inner wall of the water inlet (11) is provided with a power cavity (13) for the impeller (2) to rotate, the sealing cylinder (4) is connected to the inner wall of the pump casing (1), the sealing cylinder (4) has a sealing cavity (441) for installing the power supply motor (3), the end of the motor (3) shaft is provided with the inner wall of the sealing cavity (441) and is coaxially connected to the rotating shaft of the impeller (2), the sealing cylinder (4) is directed toward the power supply motor (3), and the sealing cavity (4) is provided with a sealing cavity (441) for the impeller (2) to rotate. A plurality of heat dissipation cavities (443) are arranged at intervals on the surface of the power cavity (13), the plurality of heat dissipation cavities (443) surround the sealing cavity (441), a drainage channel (411) is arranged on the end surface of the sealing cylinder (4) facing the water outlet (12), the drainage channel (411) connects the water outlet (12) and the plurality of heat dissipation cavities (443), and when the motor (3) drives the impeller (2) to rotate, water passes through the power cavity (13), the heat dissipation cavity (443) and the drainage channel (411) in sequence through the water inlet (11) and is discharged from the water outlet (12).

2. A submersible pump according to claim 1, characterized in that: A plurality of heat dissipation gaps (14) are spaced apart between the outer peripheral surface of the sealing cylinder (4) and the inner cavity wall of the pump casing (1); a cooling cavity (15) is provided on the surface of the pump casing (1) close to the sealing cylinder (4); the cooling cavity (15) penetrates the surface of the pump casing (1) and is connected to the heat dissipation gaps (14).

3. A submersible pump according to claim 1, characterized in that: The sealing cylinder (4) comprises a cover body (41), a barrel body (44) and a plurality of locking assemblies (45); the sealing cavity (441) and the heat dissipation cavity (443) are located on the barrel body (44); the drainage channel (411) is located on the cover body (41); a plurality of locking assemblies (45) are connected between the cover body (41) and the barrel body (44) at intervals; the locking assemblies (45) are capable of sealing and fixing the cover body (41) on the barrel body (44) and closing the sealing cavity (441).

4. A submersible pump according to claim 3, characterized in that: The locking assembly (45) comprises a flange block 1 (451), a flange block 2 (452), a sliding block (453), a locking block (456) and a plurality of fixing bolts (4515). The flange block 1 (451) is connected to a surface of the cover body (41) close to the barrel body (44), and the flange block 2 (452) is connected to a surface of the barrel body (44) close to the cover body (41). The surface of the flange block 1 (451) is provided with a plurality of threaded holes 1 (4511) for the ends of the fixing bolts (4515) to penetrate at intervals, and the arrangement direction of the threaded holes 1 (4511) and the length direction of the flange block 1 (451) are parallel to each other. The surface of the flange block 2 (452) is provided with a plurality of threaded holes 2 (4521) for the ends of the fixing bolts (4515) to be embedded in one by one, and the ends of the fixing bolts (4515) are penetrated by threaded holes 1 (4511). 511) and is screwed and fixed on the inner wall of the second threaded hole (4521) to form a fixed part; the surface of the second flange block (452) is provided with a sliding cavity (4522) for the sliding block (453) to slide; the locking block (456) is connected to the surface of the sliding block (453) facing the first flange block (451); the surface of the first flange block (451) is provided with a locking cavity (4512) for the locking block (456) to be embedded; The locking cavity (4512) is connected to the sliding cavity (4522). When the sliding block (453) slides along the inner wall of the sliding cavity (4522) toward the barrel body (44), the locking block (456) is embedded in the locking cavity (4512). The surface of the locking block (456) is pressed against the inner wall of the locking cavity (4512) to form a limit, and the end face of the locking block (456) is flush with the surface of the flange block (451).

5. A submersible pump according to claim 4, characterized in that: The locking assembly (45) further comprises an elastic member 1 (454), one end of the elastic member 1 (454) in the elastic force direction is connected to the inner wall of the sliding cavity (4522), and the other end of the elastic member 1 (454) in the elastic force direction is connected to the surface of the sliding block (453), and the elastic member 1 (454) has the elastic force to drive the sliding block (453) to slide in the direction close to the barrel body (44), and the locking block (456) has the tendency to be embedded in the locking cavity (4512).

6. A submersible pump according to claim 5, characterized in that: The locking assembly (45) further comprises a positioning plate (455) and a plurality of positioning rings (4510); the positioning plate (455) is provided with a plurality of rotation cavities (4551) at intervals on its plate surface for the ends of the fixing bolts (4515) to rotate; the positioning rings (4510) correspond to the rotation cavities (4551) one by one and are coaxially connected to the inner wall of the rotation cavities (4551); the outer circumferential surface of the fixing bolts (4515) is provided with a plurality of rotation cavities (4551) for the ends of the fixing bolts (4515) to rotate; The flange block (451) is provided with a positioning cavity (4513) on its end surface for the positioning plate (455) to be embedded therein. When the end of the fixing bolt (4515) passes through the threaded hole (4511) and is screwed and fixed in the threaded hole (4521), the positioning plate (455) is embedded in the positioning cavity (4513), and the surface of the positioning plate (455) is flush with the surface of the flange block (451).

7. A submersible pump according to claim 6, characterized in that: The locking assembly (45) further comprises a locking rod (457), the end of which is connected to the end surface of the positioning plate (455) facing the flange block (451), and the inner wall of the positioning cavity (4513) is provided with a slideway (4514) for the locking rod (457) to slide, and the sliding direction of the locking rod (457) and the height direction of the flange block (451) are parallel to each other.

8. A submersible pump according to claim 7, characterized in that: The slideway (4514) penetrates the surface of the flange block one (451) toward the direction close to the flange block two (452); the end surface of the flange block two (452) facing the slideway (4514) is provided with a locking groove (4523) for the end of the locking rod (457) to be embedded; the locking groove (4523) is connected to the sliding cavity (4522); the surface of the sliding block (453) facing the locking groove (4523) is provided with a positioning groove (4531) for the locking rod (457) to slide; the positioning groove (4531) penetrates the outer wall of the sliding block (453); the rod surface of the locking rod (457) is provided with a sliding groove (4571) for the sliding block (453) to slide; The sliding groove (4571) passes through the rod surface of the locking rod (457). When the end of the locking block (456) protrudes from the end surface of the second flange block (452), the positioning groove (4531) is connected to the locking groove (4523). The end of the locking rod (457) is sequentially penetrated by the slideway (4514) and the positioning groove (4531) and embedded in the locking groove (4523). The plate surface of the positioning plate (455) is flush with the end surface of the first flange block (451). The sliding groove (4571) is connected to the sliding cavity (4522). The elastic force of the first elastic member (454) drives the sliding block (453) to slide along the inner wall of the sliding groove (4571) toward the barrel body (44).

9. A submersible pump according to claim 8, characterized in that: The locking assembly (45) further comprises a positioning bar (458), wherein the positioning bar (458) is slidably connected to the inner wall of the locking groove (4523). When the positioning groove (4531) is connected to the locking groove (4523), the end of the positioning bar (458) is driven along the inner wall of the locking groove (4523) to approach the sliding block (453) and be embedded in the positioning groove (4531). The outer wall of the positioning bar (458) abuts against the inner wall of the positioning groove (4531) and limits the sliding of the sliding block (453).

10. A submersible pump according to claim 9, characterized in that: The locking assembly (45) further comprises an elastic member 2 (459), one end of the elastic member 2 (459) in the elastic force direction is connected to the surface of the positioning strip (458), and the other end of the elastic member 2 (459) in the elastic force direction is connected to the inner wall of the locking groove (4523). The elastic member 2 (459) has the tendency to drive the positioning strip (458) to slide in the direction close to the sliding block (453) and drive the end of the positioning strip (458) to embed into the positioning groove (4531).

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