Accurate metering gear pump

Abstract

The utility model relates to the technical field of gear pumps, in particular to an accurate metering gear pump. The precise metering gear pump is provided with an impurity removing and filtering structure. The device comprises a sleeve, a filter screen kit, a sealing cover plate and the like, the detachable sleeve is arranged in the observation hole in a sleeved mode, the lower portion of the sleeve is inserted into the liquid inlet connector, a liquid through hole communicated with the liquid inlet connector is formed in the lower portion of the sleeve, mounting grooves are formed in the inner wall of the liquid through hole at intervals in the circumferential direction, and the filter screen kit is arranged in the mounting grooves. And a group of filter screen suites are connected between the mounting grooves in a clamping manner. Through the three filter screens which are different in pore diameter and are obliquely arranged at intervals, the purpose of filtering and blocking impurities in liquid flowing through the liquid inlet connector is achieved; and metal impurities in the liquid can be adsorbed and isolated through the magnetic blocks, so that the purpose of protecting the interior of the pump body, the driving gear and the driven gear is achieved, and the liquid metering accuracy of the gear pump can be kept for a long time.

Description

Technical Field

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

[0002] Gear pumps produce volume changes through the rotation and mutual meshing of gears, thereby sucking in and discharging liquids. They are suitable for the transportation of a variety of liquids, including lubricating oil, fuel, corrosive liquids, etc.

[0003] At present, the existing gear pumps have a relatively simple structural design, and are mainly composed of a pump body, gears, a rotating shaft, a seal and an outer cover. Since the existing gear pumps usually do not have a corresponding impurity removal and filtering structure, after being used for a period of time, the inside of the pump body and the gears are prone to corresponding wear, which leads to insufficient working pressure of the gear pump and inaccurate metering and delivery accuracy. Severe wear will affect normal use.

[0004] To this end, a precision metering gear pump with a debris removal and filtering structure is proposed to solve the above technical problems. Utility Model Content

[0005] In order to overcome the shortcomings that existing gear pumps usually do not have the structural function of impurity removal and filtration, which easily causes the internal structure to wear too quickly and thus leads to low metering accuracy, the technical problem is: to provide a precise metering gear pump with an impurity removal and filtration structure.

[0006] The technical scheme is as follows: a precision metering gear pump, comprising a pump body, an upper end cover, a lower end cover, a driving gear, a driven gear, a liquid inlet interface, a liquid outlet interface and bolts, and also comprising a filter assembly, a filter assembly for filtering impurities flowing through the liquid inlet interface is arranged between the upper end cover and the pump body, the filter assembly comprises a sleeve, a magnetic block, a filter kit, a sealing cover plate and a countersunk screw, an observation hole connected to each other is opened between the upper end cover and the left middle part of the pump body, and the observation hole is connected to the liquid inlet interface, a detachable sleeve is sleeved in the observation hole, and the lower part of the sleeve is inserted into the liquid inlet interface, a liquid through hole connected to the liquid inlet interface is opened in the lower part of the sleeve, and the inner wall of the liquid through hole is provided with mounting grooves at intervals along the circumferential direction, a group of filter kits are connected between the mounting grooves, the upper end of the sleeve is connected with a sealing cover plate, and the sealing cover plate is fixedly installed on the upper end cover by countersunk screws, and the lower end of the sleeve is embedded with a magnetic block.

[0007] As a further improvement of the above solution, the filter kit is mainly composed of three filter screens with different pore sizes.

[0008] As a further improvement of the above solution, the aperture values ​​of the three filter screens decrease from large to small from left to right.

[0009] As a further improvement of the above solution, the three filter screens are all designed with an inclined structure with the left side lower and the right side higher.

[0010] As a further improvement of the above solution, the outer wall of the sleeve is symmetrically provided with limiting protrusions that are engaged with the observation hole.

[0011] As a further improvement of the above solution, the sealing cover is made of a transparent acrylic material.

[0012] As a further improvement of the above solution, the upper end surface of the sealing cover plate is flush with the upper end surface of the upper end cover.

[0013] The beneficial effects of the utility model are as follows: three filter screens with different apertures and arranged obliquely at intervals are used to filter out impurities in the liquid flowing through the liquid inlet interface; and the magnetic block is used to adsorb and isolate metal impurities in the liquid, thereby protecting the inside of the pump body and the active gear and the passive gear, thereby maintaining the accuracy of liquid metering of the gear pump for a long time, thereby effectively solving the problem that the existing gear pump is prone to excessive wear during use, resulting in inaccurate metering and delivery accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional view of the utility model.

[0016] Figure 3 This is a structural separation diagram of the utility model.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the filter assembly of the utility model.

[0018] Figure 5 It is a cross-sectional view of the filter assembly of the utility model.

[0019] Explanation of the reference numerals: 1: pump body, 2: upper end cover, 3: lower end cover, 4: driving gear, 5: driven gear, 6: liquid inlet interface, 7: liquid outlet interface, 8: bolt, 9: observation hole, 10: sleeve, 11: liquid hole, 12: mounting groove, 13: magnetic block, 14: filter kit, 15: sealing cover plate, 16: countersunk screw, 100: limiting protrusion. DETAILED DESCRIPTION

[0020] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0021] Embodiment: The precision metering gear pump provided by the utility model, see Figure 1-Figure 5 As shown, it includes a pump body 1, an upper end cover 2, a lower end cover 3, a driving gear 4, a driven gear 5, a liquid inlet interface 6, a liquid outlet interface 7, bolts 8 and a filter assembly. The upper and lower sides of the pump body 1 are respectively assembled with the upper end cover 2 and the lower end cover 3 by bolts 8. The middle part of the pump body 1 and the upper end cover 2 and the lower end cover 3 are respectively equipped with a driving gear 4 and a driven gear 5 through bearing sleeves, and the driving gear 4 and the driven gear 5 are meshed with each other. The middle part of the left side of the pump body 1 is connected and communicated with the liquid inlet interface 6, and the middle part of the right side of the pump body 1 is connected and communicated with the liquid outlet Interface 7, a filter assembly is arranged between the upper end cover 2 and the pump body 1, through which the impurities flowing through the liquid inlet interface 6 can be filtered and isolated, which is beneficial to effectively protect the gear pump and thus help to extend the service life of the gear pump. The filter assembly includes a sleeve 10, a magnetic block 13, a filter kit 14, a sealing cover plate 15 and a countersunk screw 16. An observation hole 9 is provided between the upper end cover 2 and the left middle part of the pump body 1, and the observation hole 9 is connected to the liquid inlet interface 6. A detachable sleeve 10 is provided, and the lower part of the sleeve 10 is inserted into the liquid inlet interface 6. A liquid through hole 11 connected to the liquid inlet interface 6 is provided at the lower part of the sleeve 10. The inner wall of the liquid through hole 11 is provided with mounting grooves 12 at intervals along the circumferential direction. A group of filter kits 14 are connected and connected between the mounting grooves 12. A sealing cover plate 15 is connected to the upper end of the sleeve 10, and the sealing cover plate 15 is fixedly installed on the upper end cover 2 by countersunk screws 16. The sealing cover plate 15 is made of transparent acrylic material, which is conducive to the filter kit 1 4 can be clearly checked for filtering conditions, which is beneficial for convenient maintenance. The upper end surface of the sealing cover plate 15 is flush with the upper end surface of the upper end cover 2, which is convenient for cleaning and maintenance of the sealing cover plate 15. The lower end of the sleeve 10 is embedded with a magnetic block 13, which is a strong permanent magnet block, which is beneficial for adsorbing and isolating metal debris in the liquid, thereby further improving the filtering efficiency of impurities and reducing the wear inside the gear pump, which is beneficial for maintaining the metering accuracy of the gear pump.

[0022] For further information, see Figure 4 and Figure 5 As shown, the filter kit 14 is mainly composed of three filter screens with different apertures, which is beneficial to filtering impurities of different diameters. The aperture values ​​of the three filter screens decrease from large to small from left to right, which is beneficial to improving the filtering efficiency of impurities. The three filter screens are all designed with an inclined structure of low on the left and high on the right. In the same liquid hole 11, it is beneficial to increase the contact area between the filter screen and the liquid, which is beneficial to further improve the efficiency of filtering impurities, and is beneficial to maintaining the normal circulation of the liquid without interfering with the normal transportation of the liquid.

[0023] In addition, see Figure 4As shown, the outer wall of the sleeve 10 is symmetrically provided with limiting protrusions 100 adapted to the observation hole 9, which is beneficial to clamping and limiting the sleeve 10, and further helps to improve the installation stability of the sleeve 10.

[0024] When in use, the infusion tube and the discharge tube are respectively sleeved on the liquid inlet interface 6 and the liquid outlet interface 7, and the gear pump can be driven to work by connecting the driving device to the connecting shaft of the driving gear 4; the filter kit 14 is arranged at intervals, which is conducive to the blocking and filtering of impurities in the liquid flowing through the liquid inlet interface 6, and the auxiliary effect of the magnetic block 13 is conducive to the adsorption of metal debris in the circulating liquid, so that it is conducive to the protection of the inside of the pump body 1 and the driving gear 4 and the passive gear 5, reducing the wear of the internal structure, and thus helping to maintain the accuracy of the liquid metering of the gear pump for a long time; and through the transparent sealing cover plate 15, the filtering condition of the filter kit 14 can be conveniently checked. When it is necessary to clean the impurities on the filter kit 14, when the gear pump is closed, only the countersunk screw 16 needs to be disassembled with a tool, and the sealing cover plate 15, the sleeve 10, the magnetic block 13 and the filter kit 14 can be taken out upward synchronously, so that it is conducive to the purpose of convenient cleaning and maintenance of the impurities on the filter kit 14, and the operation is simple and convenient to use.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision metering gear pump, comprising a pump body (1), an upper end cover (2), a lower end cover (3), a driving gear (4), a driven gear (5), a liquid inlet interface (6), a liquid outlet interface (7) and bolts (8), characterized in that: The pump body (1) further comprises a filter assembly, wherein a filter assembly for filtering impurities flowing through the liquid inlet interface (6) is arranged between the upper end cover (2) and the pump body (1), and the filter assembly comprises a sleeve (10), a magnetic block (13), a filter screen set (14), a sealing cover plate (15) and a countersunk screw (16); an observation hole (9) which is in communication with each other is provided between the upper end cover (2) and the left middle part of the pump body (1), and the observation hole (9) is in communication with the liquid inlet interface (6); a detachable sleeve (10) is provided in the observation hole (9), and the sleeve The lower part of the tube (10) is inserted into the liquid inlet interface (6); the lower part of the sleeve (10) is provided with a liquid through hole (11) connected to the liquid inlet interface (6); the inner wall of the liquid through hole (11) is provided with installation grooves (12) spaced along the circumferential direction; a group of filter screen sets (14) are snap-connected between the installation grooves (12); the upper end of the sleeve (10) is connected with a sealing cover plate (15), and the sealing cover plate (15) is fixedly installed on the upper end cover (2) by countersunk screws (16); the lower end of the sleeve (10) is embedded with a magnetic block (13).

2. The precision metering gear pump according to claim 1, characterized in that: The filter screen set (14) is mainly composed of three filter screens with different apertures.

3. The precise metering gear pump according to claim 2, characterized in that: The aperture values ​​of the three filter screens decrease from large to small from left to right.

4. The precision metering gear pump according to claim 3, characterized in that: The three filter screens are all designed with an inclined structure with the left side lower and the right side higher.

5. The precision metering gear pump according to claim 1, characterized in that: The outer wall of the sleeve (10) is symmetrically provided with limiting protrusions (100) that are engaged with the observation hole (9).

6. The precision metering gear pump according to claim 1, characterized in that: The sealing cover plate (15) is made of a transparent acrylic material.

7. The precision metering gear pump according to claim 6, characterized in that: The upper end surface of the sealing cover plate (15) is flush with the upper end surface of the upper end cover (2).

Images