Structure of pump

Abstract

The utility model discloses a pump structure which can store a certain amount of water for cooling a motor and prolong the service life of the motor. The pump structurally comprises an inner shell, an impeller and a motor. The lower portion of the inner shell is provided with a water pumping cavity, and the upper portion of the inner shell is provided with an installation cavity, a drainage channel and a water storage cavity which communicate with the water pumping cavity. A water inlet is formed in the bottom of the water pumping cavity; the water storage cavity is adjacent to the mounting cavity, a water passing hole communicated with the water pumping cavity is formed in the bottom of the water storage cavity, and the top of the water storage cavity is communicated to the outside of the inner shell; the impeller is arranged in the water pumping cavity; the motor is installed in the installation cavity, and an output shaft of the motor penetrates into the water pumping cavity in a movable sealing mode and is coaxially connected with the impeller.

Description

Technical Field

[0001] The utility model relates to a pump, in particular to a pump structure capable of extending the service life. Background Art

[0002] A pump is a mechanical device used to increase fluid pressure to transport fluid (usually liquid or gas). When a pump is working, it usually sucks in the fluid through the inlet, then increases the energy of the fluid in the impeller or other working parts of the pump, and finally transports the fluid to the destination through the outlet.

[0003] When using a pump to pump water, in order to pump out as much water as possible from the pumped location, the impeller's rotating shaft is usually perpendicular to the bottom surface of the pumped location, and the motor inside the pump is generally located above the impeller. In the prior art, the motor is generally cooled by the water around the motor. As the water level drops as the pumping progresses, the water around the motor will also decrease, resulting in a poor cooling effect, a high operating temperature of the motor, and a shortened service life. Utility Model Content

[0004] The utility model aims to provide a pump structure to solve the problems existing in the prior art and to store a certain amount of water for cooling the motor, thereby extending the service life of the motor.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A pump structure comprises an inner casing, an impeller and a motor; a water pumping chamber is arranged at the lower part of the inner casing, and a mounting chamber, a drainage channel and a water storage chamber respectively connected with the water pumping chamber are arranged at the upper part of the inner casing; a water inlet is arranged at the bottom of the water pumping chamber; the water storage chamber is adjacent to the mounting chamber, and a water through hole connected with the water pumping chamber is arranged at the bottom of the water storage chamber, and the top of the water storage chamber is connected to the outside of the inner casing; the impeller is arranged in the water pumping chamber; the motor is installed in the mounting chamber, and its output shaft dynamically and sealedly penetrates the water pumping chamber and is coaxially connected with the impeller.

[0007] Two water retaining ribs are connected between the outer wall of the installation cavity and the outer wall of the drainage channel, and the water storage cavity is surrounded by the outer wall of the water pumping cavity, the outer wall of the installation cavity, the outer wall of the drainage channel and the water retaining ribs.

[0008] A through hole for the output shaft of the motor to pass through is arranged between the installation cavity and the water pumping cavity, and an oil seal covering the output shaft is arranged in the through hole.

[0009] The inner shell comprises a detachably connected shell and a base; the water pumping cavity is arranged in the base and covered by the shell; the installation cavity, the drainage channel and the water storage cavity are all arranged in the shell.

[0010] The pump structure also includes an outer shell; the circumferential surface of the inner shell is provided with a mounting table; the outer shell is sleeved on the upper part of the inner shell surface, and the lower end is sealed and connected to the upper surface of the mounting table.

[0011] Preferably, a removable sealing cover is provided on the top of the installation cavity, and a wire clip is provided on the sealing cover for passing the wires of the motor; the outer shell is provided with an exhaust pipe for passing the wire clip, and a gap for exhaust is left between the inner wall of the exhaust pipe and the outer wall of the wire clip.

[0012] Preferably, the circumferential surface of the inner shell is provided with supporting ribs abutting against the inner wall of the outer shell, and the supporting ribs are provided with first drainage holes.

[0013] Preferably, the shell is provided with a drain outlet opposite to the drain channel; a check valve is provided at the output end of the drain channel; the check valve is a diaphragm arranged at the output end of the drain channel; a cross rib is provided at the output end of the drain channel; the lower end of the drain outlet extends downward and presses the periphery of the diaphragm.

[0014] The pump structure also includes a filter cover; the filter cover is sleeved on the lower part of the inner shell surface.

[0015] A second drainage hole is provided at the bottom of the water storage cavity, and the second drainage hole is communicated with the outside of the inner shell.

[0016] After adopting the above technical solution, the utility model has the following technical effects:

[0017] The utility model arranges a water storage chamber next to the installation chamber of the inner shell. When the motor is working, water starts to flow into the water pumping chamber, and is drained through the drainage channel under the action of the impeller. At the same time, water also enters the water storage chamber through the water through hole, so that the water storage chamber stores water. After the water storage chamber is full, the water overflows to the outside of the inner shell and is then pumped into the water pumping chamber. When the motor stops, the water in the water storage chamber is gradually discharged into the water pumping chamber through the water through hole. In summary, when the motor is running, a certain amount of flowing water is always stored in the water storage chamber for auxiliary cooling of the motor, thereby avoiding overheating of the motor and extending the service life of the motor without losing the flow rate of the pump. The water through hole of the water storage chamber can also play an exhaust role. When water flows into the water pumping chamber, the air therein is discharged through the water through hole to prevent air from being trapped in the water pumping chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a specific embodiment of the utility model;

[0019] Figure 2 A cross-sectional view of a specific embodiment of the utility model Figure 1 ;

[0020] Figure 3 A cross-sectional view of a specific embodiment of the utility model Figure 2 ;

[0021] Figure 4 A three-dimensional view of the inner shell of a specific embodiment of the utility model;

[0022] Figure 5 A top view of the inner shell of a specific embodiment of the utility model;

[0023] Description of Figure Numbers:

[0024] 1-inner shell; 1a-shell; 1b-base; 11-pumping chamber; 111-water inlet; 12-installation chamber; 121-perforation; 13-drainage channel; 131-cross ribs; 14-water storage chamber; 141-water hole; 142-second drainage hole; 15-water retaining ribs; 16-installation table; 17-support ribs; 171-first drainage hole; 2-impeller; 3-motor; 31-output shaft; 32-electric wire; 4-oil seal; 5-shell; 51-drainage port; 6-sealing cover; 7-wire clamp; 8-exhaust pipe; 9-diaphragm; 10-filter cover. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0026] refer to Figure 1-5 As shown, the utility model discloses a pump structure, including an inner casing 1, an impeller 2 and a motor 3;

[0027] The lower part of the inner shell 1 is provided with a pumping chamber 11, and the upper part thereof is provided with an installation chamber 12, a drainage channel 13 and a water storage chamber 14 respectively connected with the pumping chamber 11; the bottom of the pumping chamber 11 is provided with a water inlet 111; the water storage chamber 14 is adjacent to the installation chamber 12, and the bottom thereof is provided with a water hole 141 connected with the pumping chamber 11, and the top of the water storage chamber 14 is connected to the outside of the inner shell 1;

[0028] The impeller 2 is arranged in the pumping chamber 11;

[0029] The motor 3 is installed in the installation cavity 12 , and the output shaft 31 thereof penetrates into the water pumping cavity 11 in a dynamic and sealed manner and is coaxially connected to the impeller 2 .

[0030] Through the above scheme, the utility model sets a water storage chamber 14 next to the installation chamber 12 of the inner shell 1. When the motor 3 is working, the pumping chamber 11 starts to take in water, and the water is discharged through the drainage channel 13 under the action of the impeller. At the same time, the water will enter the water storage chamber 14 through the water hole 141, so that the water storage chamber 14 stores water. After the water storage chamber 14 is full, the water overflows to the outside of the inner shell 1 and is then pumped into the pumping chamber 11; when the motor 3 stops, the water in the water storage chamber 14 is gradually discharged into the pumping chamber 11 through the water hole 141; in summary, when the motor 3 is running, a certain amount of flowing water is always stored in the water storage chamber 14 to assist in cooling the motor 3, thereby avoiding overheating of the motor 3, extending the service life of the motor, and not losing the flow rate of the pump; the water hole 141 of the water storage chamber 14 can also play an exhaust role. When the pumping chamber 11 takes in water, the air therein is discharged through the water hole 141 to prevent air from being trapped in the pumping chamber 11.

[0031] Specific embodiments of the present utility model are shown below.

[0032] Two water retaining ribs 15 are connected between the outer wall of the installation cavity 12 and the outer wall of the drainage channel 13 , and the outer wall of the pumping cavity 11 , the outer wall of the installation cavity 12 , the outer wall of the drainage channel 13 and the water retaining ribs 15 together form the water storage cavity 14 .

[0033] A through hole 121 through which the output shaft 31 of the power supply machine 3 passes is provided between the installation cavity 12 and the pumping cavity 11 . An oil seal 4 covering the output shaft 31 is provided in the through hole 121 to achieve dynamic sealing when the output shaft 31 rotates, thereby ensuring that water does not enter the installation cavity 12 .

[0034] The inner shell 1 comprises a detachably connected shell 1a and a base 1b; the pumping chamber 11 is arranged in the base 1b and covered by the shell 1a; the installation chamber 12, the drainage channel 13 and the water storage chamber 14 are all arranged in the shell 1a. The split-design inner shell 1 is easier to demould during production and is also convenient for installing the impeller 2.

[0035] The utility model further comprises an outer shell 5; the circumference of the inner shell 1 is provided with a mounting table 16; the outer shell 5 is sleeved on the upper part of the surface of the inner shell 1, and the lower end is sealed and connected to the upper surface of the mounting table 16. By providing the outer shell 5, the surface of the inner shell 1 can be covered to prevent the water storage cavity 14 from being exposed.

[0036] In some embodiments of the utility model, a detachable sealing cover 6 is provided on the top of the installation cavity 12, and a wire clip 7 is provided on the sealing cover 6 for the wire 32 of the power supply machine 3 to pass through; the housing 5 is provided with an exhaust pipe 8 for the wire clip 7 to pass through, and a gap for exhaust is left between the inner wall of the exhaust pipe 8 and the outer wall of the wire clip 7. When the pump is put into water, the air in the water pumping cavity 11 will enter the water storage cavity 14 through the water hole 141, and then be discharged from the gap between the exhaust pipe 8 and the wire clip 7.

[0037] In some embodiments of the utility model, the circumferential surface of the inner shell 1 is provided with supporting ribs 17 abutting against the inner wall of the outer shell 5, so as to prevent the inner shell 1 from shaking in the outer shell 5 and ensure the stability of the structure; the supporting ribs 17 are provided with a first drainage hole 171 to discharge the overflow water of the water storage chamber 14 downward.

[0038] In some embodiments of the present invention, the housing 5 is provided with a drain port 51 opposite to the drain channel 13; a check valve is provided at the output end of the drain channel 13, and the check valve is connected to the drain port 51. The check valve can prevent water from flowing back into the drain channel 13.

[0039] Furthermore, the check valve is a diaphragm 9 arranged at the output end of the drainage channel 13; a cross rib 131 is arranged at the output end of the drainage channel 13; the lower end of the drainage port 51 extends downward and presses the periphery of the diaphragm 9, and the diaphragm 9 can be fixed by relative installation of the outer shell 5 and the inner shell 1. By designing a diaphragm check valve and installing it inside the pump (i.e., between the output end of the drainage channel 13 and the drainage port 51), the flow rate of the pump itself is almost not affected.

[0040] In some embodiments of the present invention, the present invention further comprises a filter cover 10; the filter cover 10 is sleeved on the lower part of the surface of the inner shell 1, and is used to filter impurities entering the pump.

[0041] The bottom of the water storage chamber 14 is provided with a second drainage hole 142, which is connected to the outside of the inner shell 1. By designing the cross-sectional areas of the water holes 141 and the second drainage holes 142, the water storage speed and drainage speed of the water storage chamber 14 can be reasonably controlled. In this embodiment, the number of the water holes 141 is designed to be two, so that the water storage chamber 14 has more holes for water intake and drainage, and the openings are smaller and can be distributed at multiple positions relative to the impeller 2.

[0042] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A pump structure, characterized in that: Includes inner casing, impeller and motor; The lower part of the inner shell is provided with a water pumping cavity, and the upper part thereof is provided with an installation cavity, a drainage channel and a water storage cavity respectively connected with the water pumping cavity; the bottom of the water pumping cavity is provided with a water inlet; the water storage cavity is adjacent to the installation cavity, and the bottom of the water storage cavity is provided with a water hole connected with the water pumping cavity, and the top of the water storage cavity is connected to the outside of the inner shell; The impeller is arranged in the water pumping chamber; The motor is installed in the installation cavity, and the output shaft thereof penetrates into the water pumping cavity in a dynamic and sealed manner and is coaxially connected with the impeller.

2. The pump structure according to claim 1, characterized in that: Two water retaining ribs are connected between the outer wall of the installation cavity and the outer wall of the drainage channel, and the water storage cavity is surrounded by the outer wall of the water pumping cavity, the outer wall of the installation cavity, the outer wall of the drainage channel and the water retaining ribs.

3. The pump structure according to claim 1, characterized in that: A through hole for the output shaft of the motor to pass through is arranged between the installation cavity and the water pumping cavity, and an oil seal covering the output shaft is arranged in the through hole.

4. The pump structure according to claim 1, characterized in that: The inner shell comprises a detachably connected shell and a base; the water pumping cavity is arranged in the base and covered by the shell; the installation cavity, the drainage channel and the water storage cavity are all arranged in the shell.

5. The pump structure according to claim 1, characterized in that: It also includes an outer shell; the circumferential surface of the inner shell is provided with a mounting table; the outer shell is sleeved on the upper part of the inner shell surface, and the lower end is sealed and connected to the upper surface of the mounting table.

6. The pump structure according to claim 5, characterized in that: A detachable sealing cover is arranged on the top of the installation cavity, and a wire clip is arranged on the sealing cover for the wires of the motor to pass through; the outer shell is provided with an exhaust pipe for the wire clip to pass through, and a gap for exhaust is left between the inner wall of the exhaust pipe and the outer wall of the wire clip.

7. The pump structure according to claim 5, characterized in that: The circumferential surface of the inner shell is provided with supporting ribs abutting against the inner wall of the outer shell, and the supporting ribs are provided with first drainage holes.

8. The pump structure according to claim 5, characterized in that: The shell is provided with a drain port opposite to the drain channel; a check valve is provided at the output end of the drain channel; the check valve is a diaphragm provided at the output end of the drain channel; a cross rib is provided at the output end of the drain channel; the lower end of the drain port extends downward and presses the periphery of the diaphragm.

9. The pump structure according to claim 1, characterized in that: It also includes a filter cover; the filter cover is sleeved on the lower part of the inner shell surface.

10. The pump structure according to claim 1, characterized in that: A second drainage hole is provided at the bottom of the water storage cavity, and the second drainage hole is communicated with the outside of the inner shell.

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