An internal gear pump

Abstract

The utility model discloses an inner meshing gear pump relates to gear pump field, including the side cover plate of setting in pump body one side, all fixedly connected with the plug -in rod in the corner of side cover plate, the end portion screw thread connection of plug -in rod has the screw ring, all are passed and are set in the plug -in hole of the corner of pump body, the drive shaft is set up on the pump body and is passed, and the inner gear is clamped to have on the drive shaft, and the inside rotatory connection of pump body has the gear ring, and the inside wall of pump body clamps and has the crescent plate, and one side edge fixedly connected with first seal ring pad of pump body, and one side edge of side cover plate has established first seal groove, and the inside fixedly connected with second seal ring pad of side cover plate. The utility model has the advantages of: can avoid liquid from the side cover plate and the leakage between pump body and come out, realized the sealed connection function of side cover plate and pump body, and the better protection, and can carry out multistage processing to the liquid of gear pump and can carry out the quick cleaning to the impurity on the filter structure, and the service life of gear pump internal device is ensured.

Description

Technical Field

[0001] This utility model relates to the field of gear pumps, and in particular to an internal meshing gear pump. Background Technology

[0002] Internal gear pumps differ from common external gear pumps in that their gear pair consists of an inner driving external gear and an outer driven internal gear ring. They are compact, smoothly operating positive displacement fluid machines. Their core working principle involves the engagement and disengagement of the internal gear pair, creating a change in the volume of the sealed working chamber, thereby facilitating the intake and discharge of fluid.

[0003] Patent CN216278447U discloses an internal gear pump. By setting two sets of internally meshing gears, the connecting parts and the inner wall of the pump body can cooperate with each other, so that the connecting parts will not grind the particles in the medium during rotation, reducing wear on the surface of the connecting parts and improving the service life of the gear pump. However, in the use of existing internal gear pumps, gaps are prone to appear at the connection between the side cover and the gear pump body, which makes it easy for liquid to leak to the outside of the pump body, resulting in poor sealing and protection. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an internal gear pump. When existing internal gear pumps are in use, gaps easily appear at the connection between the side cover and the gear pump body, which makes it easy for liquid to leak to the outside of the pump body, resulting in poor sealing and protection.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is an internal meshing gear pump, including a side cover plate disposed on one side of the pump body, wherein each corner of the side cover plate is fixedly connected with a plug rod, and the end of the plug rod is threadedly connected with a threaded ring, and each corner of the pump body is provided with a through-hole. A drive shaft is provided through the pump body, an internal gear is engaged on the drive shaft, a gear ring is rotatably connected to the inner side of the pump body, and a crescent plate is engaged on the inner wall of the pump body. A first sealing ring gasket is fixedly connected to one side edge of the pump body, a first sealing groove is opened on one side edge of the side cover plate, a second sealing ring gasket is fixedly connected to the inner side of the side cover plate, an expansion ring pipe is fixedly connected to the second sealing ring gasket, a connecting pipe that passes through the second sealing ring gasket and the side cover plate is fixedly connected to the expansion ring pipe, an air inlet is clamped to the other end of the connecting pipe, and a second sealing groove is opened on the pump body.

[0006] As a further embodiment of this utility model: the plug rod fits into the plug hole, and the four sets of screw rings are respectively located at the corners of the pump body.

[0007] As a further embodiment of this utility model: the internal gear meshes with the gear ring, and the crescent plate is located between the internal gear and the gear ring.

[0008] As a further embodiment of this utility model: the first sealing ring gasket fits into the first sealing groove, and the inner diameter of the first sealing ring gasket is larger than the outer diameter of the second sealing ring gasket.

[0009] As a further embodiment of this utility model: both the second sealing ring gasket and the expansion ring tube are located inside the second sealing groove.

[0010] As a further embodiment of this utility model: the inlet and outlet of the pump body are respectively connected to an inlet pipe and an outlet pipe, the other end of the inlet pipe is connected to a filter cylinder, the end of the filter cylinder is provided with a baffle plate, an internally threaded ring plate is fixedly sleeved on the baffle plate, a connecting rod is fixedly connected in the middle of the baffle plate, a first filter screen, a second filter screen and a third filter screen are fixedly sleeved on the connecting rod, and an external connecting pipe is connected to one end of the filter cylinder.

[0011] As a further embodiment of this utility model: the internally threaded ring plate is threadedly connected to the filter cylinder, and the first filter screen, the second filter screen and the third filter screen are all located inside the filter cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model include: by using four sets of plug rods and four sets of plug holes in conjunction with four sets of screw rings, the side cover plate and the pump body are tightly connected. At this time, the first sealing ring gasket is located inside the first sealing groove, and the second sealing ring gasket is located inside the second sealing groove. Then, by using an inflation head in conjunction with a connecting pipe to inflate the expansion ring tube, the expansion ring tube is tightly fitted to the inner side of the second sealing groove, which can prevent liquid from leaking out between the side cover plate and the pump body, thus achieving the sealing connection function between the side cover plate and the pump body, and providing good protection.

[0013] Compared with the prior art, the beneficial effects of this utility model include: the liquid is introduced into the interior of the filter cylinder through the external connecting pipe, and then the liquid is introduced into the interior of the inlet pipe through the layer-by-layer filtration of the first filter screen, the second filter screen and the third filter screen. When a large amount of impurities accumulate in the filter cylinder, the threaded connection between the internal threaded ring plate and the filter cylinder causes the baffle spiral to move away from the filter cylinder, and with the cooperation of the connecting rod, the first filter screen, the second filter screen and the third filter screen are removed from the interior of the filter cylinder. This allows for multi-stage treatment of the liquid entering the gear pump while quickly cleaning impurities on the filter structure, ensuring the service life of the internal components of the gear pump. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an internal meshing gear pump according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the connection structure of the pump body in an embodiment of this utility model; Figure 3 This is a schematic diagram of the connection structure of the side cover plate in an embodiment of this utility model; Figure 4 This is a schematic diagram of the connection structure of the filter cylinder in an embodiment of this utility model.

[0015] In the diagram: 1. Pump body; 2. Side cover plate; 3. Internal gear; 4. Gear ring; 5. Crescent plate; 6. Inlet pipe; 7. Drain pipe; 8. Connecting rod; 9. Threaded ring; 10. Connecting hole; 11. First sealing ring gasket; 12. First sealing groove; 13. Second sealing ring gasket; 14. Expansion ring pipe; 15. Connecting pipe; 16. Inflation head; 17. Second sealing groove; 18. Filter cylinder; 19. Baffle plate; 20. Internal threaded ring plate; 21. Connecting rod; 22. First filter screen; 23. Second filter screen; 24. Third filter screen; 25. External connecting pipe; 26. Drive shaft. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Example 1, please refer to Figures 1-4 An internal gear pump includes a side cover plate 2 disposed on one side of a pump body 1. Insertion rods 8 are fixedly connected to the corners of the side cover plate 2. A threaded ring 9 is threaded to the end of each insertion rod 8. Insertion holes 10 are provided through the corners of the pump body 1. A drive shaft 26 is provided through the pump body 1. An internal gear 3 is engaged on the drive shaft 26. A gear ring 4 is rotatably connected to the inner side of the pump body 1. A crescent plate 5 is engaged on the inner wall of the pump body 1. A first sealing ring gasket 11 is fixedly connected to one side edge of the pump body 1. A first sealing groove 12 is provided on one side edge of the side cover plate 2. A second sealing ring gasket 13 is fixedly connected to the inner side of the side cover plate 2. An expansion ring pipe 14 is fixedly connected to the second sealing ring gasket 13. A connecting pipe 15, penetrating the second sealing ring gasket 13 and the side cover plate 2, is fixedly connected to the expansion ring pipe 14. An inflation head 16 is secured to the other end of the connecting pipe 15. A second sealing groove 17 is provided on the pump body 1.

[0018] The plug rod 8 fits into the plug hole 10, and the four sets of screw rings 9 are located at the corners of the pump body 1.

[0019] In this embodiment, the side cover plate 2 is initially connected to the pump body 1 by the cooperation of four sets of plug rods 8 and four sets of plug holes 10.

[0020] The internal gear 3 meshes with the gear ring 4, and the crescent plate 5 is located between the internal gear 3 and the gear ring 4.

[0021] In this embodiment, the internal gear 3 and the gear ring 4 mesh together to allow the gear ring 4 to rotate.

[0022] The first sealing ring gasket 11 fits into the first sealing groove 12, and the inner diameter of the first sealing ring gasket 11 is larger than the outer diameter of the second sealing ring gasket 13. The second sealing ring gasket 13 and the expansion ring tube 14 are both located inside the second sealing groove 17.

[0023] In this embodiment, the first sealing ring gasket 11 and the first sealing groove 12 are used in conjunction with the second sealing ring gasket 13 and the second sealing groove 17 so that the side cover plate 2 can be connected to the pump body 1.

[0024] Specifically, the side cover plate 2 and the pump body 1 are tightly connected by four sets of plug rods 8 and four sets of plug holes 10 in conjunction with four sets of screw rings 9. At this time, the first sealing ring gasket 11 is located inside the first sealing groove 12, and the second sealing ring gasket 13 is located inside the second sealing groove 17. Then, the expansion ring tube 14 is inflated by the air inflator 16 in conjunction with the connecting pipe 15, so that the expansion ring tube 14 is tightly fitted to the inner side of the second sealing groove 17, which can prevent liquid from leaking out between the side cover plate 2 and the pump body 1, and realize the sealing connection function between the side cover plate 2 and the pump body 1, with good protection.

[0025] Example 2, please refer to Figures 1-4 An internal gear pump has an inlet pipe 6 and a outlet pipe 7 respectively connected to the inlet and outlet of the pump body 1. The other end of the inlet pipe 6 is connected to a filter cylinder 18. A baffle 19 is provided at the end of the filter cylinder 18. An internally threaded ring plate 20 is fixedly sleeved on the baffle 19. A connecting rod 21 is fixedly connected in the middle of the baffle 19. A first filter screen 22, a second filter screen 23 and a third filter screen 24 are fixedly sleeved on the connecting rod 21. An external connecting pipe 25 is connected to one end of the filter cylinder 18.

[0026] The internal threaded ring plate 20 is threadedly connected to the filter cylinder 18, and the first filter screen 22, the second filter screen 23 and the third filter screen 24 are all located inside the filter cylinder 18.

[0027] In this embodiment, the internal threaded ring plate 20 is threadedly connected to the filter cylinder 18 so that the baffle 19 is installed at one end of the filter cylinder 18.

[0028] Specifically, liquid is introduced into the filter cylinder 18 through the external connecting pipe 25, and then introduced into the inlet pipe 6 through the layer-by-layer filtration of the first filter screen 22, the second filter screen 23 and the third filter screen 24. When a large amount of impurities accumulate in the filter cylinder 18, the threaded connection between the internal threaded ring plate 20 and the filter cylinder 18 causes the baffle plate 19 to spiral away from the filter cylinder 18, and with the cooperation of the connecting rod 21, the first filter screen 22, the second filter screen 23 and the third filter screen 24 are removed from the inside of the filter cylinder 18. This allows for multi-stage treatment of the liquid entering the gear pump while quickly cleaning impurities on the filter structure, ensuring the service life of the internal components of the gear pump.

[0029] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An internal gear pump, comprising a side cover plate (2) disposed on one side of the pump body (1), characterized in that: The corners of the side cover plate (2) are all fixedly connected with plug rods (8), and the ends of the plug rods (8) are threaded with screw rings (9). The corners of the pump body (1) are all provided with plug holes (10). A drive shaft (26) is provided through the pump body (1), an internal gear (3) is engaged on the drive shaft (26), a gear ring (4) is rotatably connected to the inner side of the pump body (1), and a crescent plate (5) is engaged on the inner wall of the pump body (1). A first sealing ring gasket (11) is fixedly connected to one side edge of the pump body (1), a first sealing groove (12) is opened on one side edge of the side cover plate (2), a second sealing ring gasket (13) is fixedly connected to the inner side of the side cover plate (2), an expansion ring pipe (14) is fixedly connected to the second sealing ring gasket (13), a connecting pipe (15) is fixedly connected to the expansion ring pipe (14) and passes through the second sealing ring gasket (13) and the side cover plate (2), an air inlet (16) is fixedly connected to the other end of the connecting pipe (15), and a second sealing groove (17) is opened on the pump body (1).

2. The internal gear pump according to claim 1, characterized in that: The plug rod (8) fits into the plug hole (10), and the four sets of screw rings (9) are located at the corners of the pump body (1).

3. The internal gear pump according to claim 1, characterized in that: The internal gear (3) meshes with the gear ring (4), and the crescent plate (5) is located between the internal gear (3) and the gear ring (4).

4. An internal gear pump according to claim 1, characterized in that: The first sealing ring gasket (11) fits into the first sealing groove (12), and the inner diameter of the first sealing ring gasket (11) is larger than the outer diameter of the second sealing ring gasket (13).

5. An internal gear pump according to claim 4, characterized in that: The second sealing ring gasket (13) and the expansion ring tube (14) are both located inside the second sealing groove (17).

6. An internal gear pump according to claim 1, characterized in that: The pump body (1) is connected to an inlet pipe (6) and a outlet pipe (7) respectively. The other end of the inlet pipe (6) is connected to a filter cylinder (18). The end of the filter cylinder (18) is provided with a baffle plate (19). An internal threaded ring plate (20) is fixedly sleeved on the baffle plate (19). A connecting rod (21) is fixedly connected in the middle of the baffle plate (19). A first filter screen (22), a second filter screen (23) and a third filter screen (24) are fixedly sleeved on the connecting rod (21). One end of the filter cylinder (18) is connected to an external connecting pipe (25).

7. An internal gear pump according to claim 6, characterized in that: The internal threaded ring plate (20) is threadedly connected to the filter cylinder (18), and the first filter screen (22), the second filter screen (23) and the third filter screen (24) are all located inside the filter cylinder (18).

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