Miniature gear pump

Abstract

The utility model discloses a miniature gear pump which comprises a motor, a pump body and a mounting seat, the motor and the pump body are respectively assembled at two ends of the mounting seat, two sides of the pump body are respectively provided with a water inlet and a water outlet, and an inner cavity of the pump body is provided with a driving gear and a driven gear which are meshed with each other between the water inlet and the water outlet. By arranging the filtering assembly and the backflushing assembly, when the gear pump extracts clean water, the clean water enters the filtering box through the external connecting pipe, and at the moment, impurities in the clean water can be effectively filtered out through the inclined filtering net, so that the impurities in the gear pump are prevented from being increased, and normal use of the gear pump is guaranteed; during cleaning, a water inlet pipe in the backflushing assembly is connected with an external water supply pipeline, backflushing water directly flushes to the filter screen through the water inlet pipe, impurities at the back end of the filter screen can be blown off, a worker can open a control valve to enable the backflushing water containing the impurities to be discharged through a drainage pipe, and cleaning by the worker is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of micro gear pumps, in particular to a micro gear pump. Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume created between the pump cylinder and meshing gears to transport liquids or increase pressure. Two gears, a pump body, and front and rear covers form two enclosed chambers. As the gears rotate, the volume of the chamber on the disengaged side increases from smaller to larger, creating a vacuum that draws liquid in. The volume of the chamber on the meshing side decreases from larger to smaller, squeezing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the discharge port of a gear pump is entirely dependent on the resistance at the pump outlet.

[0003] During the use of the existing micro gear pump, clean water enters through the water inlet and is discharged from the drain outlet. The clean water contains a large amount of impurities. These impurities are easily attached to the gear pump during the transportation process, resulting in an increase in impurities in the gear pump and affecting the operation of the gear pump. Utility Model Content

[0004] The main purpose of the utility model is to provide a micro gear pump.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A micro gear pump comprises a motor, a pump body and a mounting base, wherein the motor and the pump body are respectively assembled at both ends of the mounting base, a water inlet and a drain outlet are respectively provided on both sides of the pump body, and an inner cavity of the pump body is provided with a driving gear and a driven gear that mesh with each other between the water inlet and the drain outlet, the shaft of the motor passes through the center of the mounting base and extends into the inner cavity of the pump body and is connected to the driving gear, and the driven gear is rotatably mounted in the pump body via a pin shaft.

[0007] Preferably, the pump body includes a pump casing and a cover, one end of the pump casing is open, and the cover is installed on the open end of the pump casing. A first sealing ring is sandwiched between the pump casing and the cover, and the first sealing ring is distributed around the inner cavity of the pump body. The pump casing is assembled and connected to the mounting seat by multiple bolts passing through it and the cover, and multiple bolts are distributed around the inner cavity of the pump body.

[0008] Preferably, the cover is provided with a plurality of positioning pins vertically connected to the mounting seat, the positioning pins are embedded in the pin holes adapted at the open end of the pump casing, and the positioning pins are distributed outside the inner cavity of the pump body.

[0009] Preferably, a sealing groove adapted to the inner cavity contour of the pump body is provided at one end of the mounting seat, a second sealing ring is embedded in the sealing groove and is in sealing contact with the cover, the sealing groove is located on the inner side of the plurality of bolts and positioning pins, and an oil seal that is sealed with the shaft seal of the motor is embedded at the other end of the mounting seat.

[0010] Preferably, mounting components are provided at the four corners of the bottom end of the motor, a filter component is installed at the water inlet, the filter component includes a connecting pipe connected to the water inlet, a filter box is installed on the side of the connecting pipe away from the pump body, an inclined filter screen is installed in the filter box, an external pipe is fixed on the side of the filter box away from the connecting pipe, and a backflush component is connected to the filter box.

[0011] Preferably, the backflush assembly includes a water inlet pipe, a drain pipe and a control valve, and the water inlet pipe is located at the top of the filter box.

[0012] Preferably, the drain pipe is located at the bottom end of the filter box, and the drain pipe is connected to the control valve pipe clamp.

[0013] Preferably, threaded grooves for connecting to external pipes are provided on the inner peripheral walls of the water inlet and the drain outlet.

[0014] Preferably, the mounting assembly includes a mounting seat and a mounting hole, and the mounting hole is formed on the mounting seat.

[0015] Preferably, an indicator groove is provided on the middle portion of the pump body away from the motor.

[0016] The beneficial technical effects are:

[0017] By setting up the filter assembly and the backflush assembly, when the gear pump draws clean water, the clean water can enter the filter box through the external pipe. At this time, the impurities in the clean water can be effectively filtered out through the inclined filter screen, thereby avoiding the increase of impurities in the gear pump and ensuring the normal use of the gear pump. During cleaning, the water inlet pipe in the backflush assembly is connected to the external water supply pipe, and the backflush water directly rushes to the filter screen through the water inlet pipe, which can blow off the impurities on the back end of the filter screen. The staff can open the control valve to discharge the backflush water containing impurities through the drain pipe, which is convenient for the staff to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a preferred embodiment of a micro gear pump according to the present utility model;

[0019] Figure 2 A rear view of a preferred embodiment of a micro gear pump according to the present utility model;

[0020] Figure 3Schematic diagram of the positional relationship between the filter assembly and the backflush assembly in a preferred embodiment of the micro gear pump according to the present invention;

[0021] Figure 4 Schematic diagram of the positional relationship between the water inlet and the pump body in a preferred embodiment of the micro gear pump according to the present utility model.

[0022] Figure 5 This is a schematic structural diagram of a micro gear pump after the pump body is separated in a preferred embodiment of the present utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Motor; 2. Pump body; 3. Mounting assembly; 301. Mounting base 1; 302. Mounting hole; 4. Water inlet; 5. Drain outlet; 6. Filter assembly; 601. Connecting pipe; 602. Filter box; 603. Filter screen; 604. External pipe; 7. Backflush assembly; 701. Water inlet pipe; 702. Drain pipe; 703. Control valve; 8. Indicator slot; 9. Mounting base; 10. Driving gear; 11. Passive gear. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0026] like Figure 1-Figure 5 As shown, the micro gear pump provided in this embodiment includes a motor 1, a pump body 2 and a mounting base 9. The motor 1 and the pump body 2 are respectively assembled at both ends of the mounting base 9, so that the pump body 2 can be connected to the motor 1 through the mounting base 9, so that the motor 1 can drive the pump body 2 to work. A water inlet 4 and a drain port 5 are respectively provided on both sides of the pump body 2. The inner cavity of the pump body 2 is provided with a driving gear 10 and a driven gear 11 that mesh with each other between the water inlet 4 and the drain port 5. The shaft of the motor 1 passes through the center of the mounting base 9 and extends into the inner cavity of the pump body 2, and is connected to the driving gear 10. The driven gear 11 is rotatably mounted in the pump body 2 by a pin shaft, so that the driven gear 11 is driven to rotate by the driving gear 10.

[0027] like Figure 4-Figure 5 As shown, the pump body 2 includes a pump casing and a cover. One end of the pump casing is open, and the cover is installed on the open end of the pump casing. A first sealing ring is sandwiched between the pump casing and the cover. The first sealing ring is distributed around the inner cavity of the pump body 2. The pump casing is assembled and connected to the mounting seat 9 by multiple bolts passing through it and the cover, and multiple bolts are distributed around the inner cavity of the pump body 2.

[0028] like Figure 4-Figure 5As shown, the cover is provided with a plurality of positioning pins vertically connected to the mounting seat 9 , the positioning pins are embedded in the pin holes adapted at the open end of the pump casing, and the positioning pins are distributed outside the inner cavity of the pump body 2 .

[0029] like Figure 2-Figure 3 As shown, one end of the mounting seat 9 is provided with a sealing groove adapted to the inner cavity contour of the pump body 2, and a second sealing ring is embedded in the sealing groove to be in sealing contact with the cover. The sealing groove is located on the inner side of multiple bolts and locating pins, and the other end of the mounting seat 9 is embedded with an oil seal that is sealed with the shaft of the motor 1, which can ensure the sealing performance inside the device.

[0030] like Figures 1-4 As shown, mounting components 3 are provided at the four corners of the bottom end of the motor 1, and a filter component 6 is installed at the water inlet 4. The filter component 6 includes a connecting pipe 601 connected to the water inlet 4, and the filter box 602 is connected to the pump body 2 through the connecting pipe 601 and the water inlet 4. A filter box 602 is installed on the side of the connecting pipe 601 away from the pump body 2. Clean water is filtered through a filter screen 603 in the filter box 602. An inclined filter screen 603 is installed in the filter box 602, and an external pipe 604 is fixed on the side of the filter box 602 away from the connecting pipe 601. The external pipeline is connected to the filter box 602 through the external pipe 604, and the filter box 602 is connected to the backflush component 7.

[0031] like Figure 2-Figure 3 As shown, the backflushing assembly 7 includes a water inlet pipe 701 , a drain pipe 702 and a control valve 703 . The water inlet pipe 701 is located at the top of the filter box 602 and can backwash the filter screen 603 through the backflushing assembly 7 .

[0032] like Figure 2-Figure 3 As shown, the drain pipe 702 is located at the bottom of the filter box 602, and the drain pipe 702 is connected to the control valve 703 pipe clamp. The staff can open the control valve 703 to discharge the backwash water containing impurities through the drain pipe 702.

[0033] like Figure 1 As shown, a drain port 5 is provided on the pump body 2 on one side corresponding to the water inlet 4 . The water inlet 4 and the drain port 5 are located at the same horizontal plane. The clean water pumped by the motor 1 is discharged through the drain port 5 .

[0034] like Figure 1-Figure 2 As shown, threaded grooves for connecting external pipes are provided on the inner walls of the water inlet 4 and the drain outlet 5, which facilitate the connection of external pipes with the water inlet 4 and the drain outlet 5.

[0035] like Figure 1-Figure 2 As shown, the mounting assembly 3 includes a mounting seat 301 and a mounting hole 302 , and the mounting hole 302 is formed on the mounting seat 301 , so that the staff can use bolts to fix the motor 1 through the mounting hole 302 on the mounting seat 301 .

[0036] like Figure 1-Figure 2 As shown, an indicator groove 8 is provided in the middle of the pump body 2 away from the motor 1 , so that the staff can connect the pipeline according to the indicator groove 8 .

[0037] Working principle of this device: When this device is used, the staff uses bolts to fix the motor 1 through the mounting hole 302 on the mounting seat 301, and then the staff connects the pipes according to the indicator groove 8, and respectively connects the pipes to the drain port 5 and the water inlet 4. When connecting the water inlet 4, the filter box 602 is first connected to the water inlet 4 through the connecting pipe 601. At this time, the pipe is connected to the external pipe 604 on the filter box 602 to complete the connection. The motor 1 drives the driving gear 10 and the driven gear 11 in the pump body 2 through the mounting seat 9 to work. During the cleaning process, clean water enters the filter box 602 through the external pipe 604. At this time, the impurities in the clean water can be effectively filtered out through the inclined filter screen 603, thereby avoiding the increase of impurities in the gear pump and ensuring the normal use of the gear pump. During cleaning, the water inlet pipe 701 in the backflush component 7 is connected to the external water supply pipe. The backflush water directly rushes to the filter screen 603 through the water inlet pipe 701, which can blow off the impurities on the back end of the filter screen 603. The staff can open the control valve 703 to discharge the backflush water containing impurities through the drain pipe 702, which is convenient for the staff to clean.

[0038] The above are only further embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention based on the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. Micro gear pump, characterized by: The invention comprises a motor (1), a pump body (2) and a mounting seat (9), wherein the motor (1) and the pump body (2) are respectively mounted on both ends of the mounting seat (9), a water inlet (4) and a water outlet (5) are respectively provided on both sides of the pump body (2), and an inner cavity of the pump body (2) is provided with a driving gear (10) and a driven gear (11) that mesh with each other between the water inlet (4) and the water outlet (5), the shaft of the motor (1) passes through the center of the mounting seat (9) and extends into the inner cavity of the pump body (2), and is connected to the driving gear (10), and the driven gear (11) is rotatably mounted in the pump body (2) via a pin shaft.

2. The micro gear pump according to claim 1, characterized in that: The pump body (2) includes a pump casing and a cover, one end of the pump casing is open, and the cover is installed on the open end of the pump casing. A first sealing ring is sandwiched between the pump casing and the cover, and the first sealing ring is distributed around the inner cavity of the pump body (2). The pump casing is assembled and connected to the mounting seat (9) by a plurality of bolts passing through it and the cover, and the plurality of bolts are distributed around the inner cavity of the pump body (2).

3. The micro gear pump according to claim 2, characterized in that: The cover is provided with a plurality of positioning pins vertically connected to the mounting seat (9), the positioning pins are embedded in the pin holes adapted at the open end of the pump housing, and the positioning pins are distributed outside the inner cavity of the pump body (2).

4. The micro gear pump according to claim 3, characterized in that: One end of the mounting seat (9) is provided with a sealing groove adapted to the inner cavity contour of the pump body (2), a second sealing ring is embedded in the sealing groove and is in sealing contact with the cover, the sealing groove is located on the inner side of the plurality of bolts and positioning pins, and the other end of the mounting seat (9) is embedded with an oil seal that is sealed with the shaft of the motor (1).

5. The micro gear pump according to claim 1, characterized in that: The motor (1) is provided with mounting components (3) at the four corners of the bottom end, and a filter component (6) is installed at the water inlet (4). The filter component (6) comprises a connecting pipe (601) connected to the water inlet (4), a filter box (602) is installed on the side of the connecting pipe (601) away from the pump body (2), an inclined filter screen (603) is installed in the filter box (602), an external pipe (604) is fixed on the side of the filter box (602) away from the connecting pipe (601), and a backflushing component (7) is connected to the filter box (602).

6. The micro gear pump according to claim 5, characterized in that: The backflushing assembly (7) comprises a water inlet pipe (701), a drain pipe (702) and a control valve (703), wherein the water inlet pipe (701) is located at the top of the filter box (602).

7. The micro gear pump according to claim 6, characterized in that: The drainage pipe (702) is located at the bottom end of the filter box (602), and the drainage pipe (702) is connected to the control valve (703) with a pipe clamp.

8. The micro gear pump according to claim 1, characterized in that: The inner peripheral walls of the water inlet (4) and the drain outlet (5) are both provided with threaded grooves for connecting to external pipes.

9. The micro gear pump according to claim 5, characterized in that: The mounting assembly (3) comprises a mounting seat (301) and a mounting hole (302), and the mounting hole (302) is formed on the mounting seat (301).

10. The micro gear pump according to claim 1, characterized in that: An indicator groove (8) is provided in the middle of the pump body (2) on a side away from the motor (1).

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