CN219847643U - Gear injection pump and gear injection pump system - Google Patents
Gear injection pump and gear injection pump system Download PDFInfo
- Publication number
- CN219847643U CN219847643U CN202222596185.XU CN202222596185U CN219847643U CN 219847643 U CN219847643 U CN 219847643U CN 202222596185 U CN202222596185 U CN 202222596185U CN 219847643 U CN219847643 U CN 219847643U
- Authority
- CN
- China
- Prior art keywords
- gear
- injection pump
- rotor
- base
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007924 injection Substances 0.000 title claims abstract description 49
- 238000002347 injection Methods 0.000 title claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract description 2
- 238000001802 infusion Methods 0.000 abstract description 2
- 239000003978 infusion fluid Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 238000010999 medical injection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
Abstract
The present case discloses a gear injection pump, includes: the device comprises a base, a motor arranged at a first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an external gear rotor in driving connection with the gear shaft, an internal gear rotor sleeved on the external gear rotor and a liquid path block connected with a second end of the base. The present disclosure also provides a gear injection pump system comprising a gear injection pump, a flow rate sensor, and a controller. The gear injection pump provided by the scheme provides power for liquid infusion through the rotation of the outer gear rotor and the inner gear rotor which are eccentrically arranged, has good self-absorption, does not need to be filled with liquid before the pump is started each time, and can reduce the number of valves; the gear injection pump has the self-flushing function, is very convenient to use and maintain, has a simple and compact structure and good sealing performance, and is convenient to move and carry; the gear injection pump system further provided by the scheme can realize accurate quantitative control of the infusion liquid, and has good application prospect.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a gear injection pump and a gear injection pump system.
Background
Syringe pumps can deliver small volumes of liquid accurately, uniformly and consistently, as is common in medical injection and drug delivery techniques where a constant flow rate is required. The existing injection pump has the following defects: the injection pipeline is complex and difficult to clean; the structural design is clumsy, and is not beneficial to moving and carrying; the valve is more, and the operation is complicated and the leakproofness is poor, and the delivery accuracy receives the influence.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a gear injection pump and a gear injection pump system aiming at the defects in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme: a gear injection pump comprising: the device comprises a base, a motor arranged at a first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an external gear rotor in driving connection with the gear shaft, an internal gear rotor sleeved on the external gear rotor and a liquid path block connected with a second end of the base;
the external gear rotor and the internal gear rotor are eccentrically arranged, the external gear part at the outer periphery of the external gear rotor is eccentrically meshed with the internal gear part at the inner periphery of the internal gear rotor, and the meshing-in and meshing-out positions of the external gear part and the internal gear part are fixed, so that a meshing-out cavity area and a meshing-in cavity area which are symmetrical with each other are formed between the external gear part and the internal gear part;
the liquid path block is internally provided with a liquid inlet channel communicated with the meshing cavity area and a liquid outlet channel communicated with the meshing cavity area, and the end part of the liquid path block is provided with a liquid inlet pipe communicated with the liquid inlet channel and a liquid outlet pipe communicated with the liquid outlet channel.
Preferably, a boss is arranged at the end part of the base, and a groove for the convex block to be inserted in a matched manner is formed at the end part of the liquid path block.
Preferably, the gear shaft is in driving connection with the output shaft of the motor through a coupling.
Preferably, a bearing is arranged between the gear shaft and the base.
Preferably, a rotor holder is further provided between the internal gear rotor and the base.
Preferably, an annular sealing groove is formed in the end portion of the liquid path block, an O-shaped sealing ring is arranged in the annular sealing groove in a matched mode, and the annular sealing groove is located at the periphery of the rotor retainer.
Preferably, the liquid path block is sleeved with a shell in threaded connection with the base, and a pressing plate at the side part of the shell is in contact with the outer end face of the liquid path block.
Preferably, the pressure plate is provided with openings for the liquid inlet pipe and the liquid outlet pipe to extend out.
Preferably, the gear shaft is sleeved with a sealing gasket, and the sealing gasket is in contact with the end surfaces of the outer gear rotor and the inner gear rotor, which are far away from the liquid path block.
The utility model also provides a gear injection pump system which comprises the gear injection pump, a flow rate sensor connected with a liquid outlet pipe of the gear injection pump and a controller connected with the flow rate sensor and a motor of the gear injection pump.
The beneficial effects of the utility model are as follows:
the gear injection pump provided by the utility model provides power for liquid infusion through the rotation of the eccentrically arranged external gear rotor and the eccentrically arranged internal gear rotor, has good self-absorption, does not need to be filled with liquid before the pump is started each time, and can reduce the number of valves;
the gear injection pump has the self-flushing function, is very convenient to use and maintain, has a simple and compact structure and good sealing performance, and is convenient to move and carry;
the gear injection pump system provided by the utility model can realize accurate quantitative control of infusion liquid, and has good application prospect.
Drawings
FIG. 1 is a schematic diagram of a gear injection pump of the present utility model;
FIG. 2 is a schematic cross-sectional view of a gear injection pump of the present utility model;
FIG. 3 is an exploded view of the gear injection pump of the present utility model;
FIG. 4 is an exploded view of another view of the gear injection pump of the present utility model;
FIG. 5 is a schematic view of the configuration of the base of the present utility model mated with the external gear rotor and the internal gear rotor;
FIG. 6 is a schematic view of the structure of the liquid path block of the present utility model;
fig. 7 is a schematic structural view of the outer gear rotor and the inner gear rotor of the present utility model;
fig. 8 is a schematic diagram of the gear injection pump system of the present utility model.
Reference numerals illustrate:
1-a base; 2-a motor; 3-a gear shaft; 4-an external gear rotor; 5-an internal gear rotor; 6, a liquid path block; 7-a housing; 8-a flow rate sensor; 9-a controller; 10-a boss; 11-a bearing; 12-a rotor holder; 20-a coupler; 30-a sealing gasket; 40-an external gear section; 50-an internal gear portion; 60-liquid inlet flow channel; 61-a liquid outlet flow channel; 62-a liquid inlet pipe; 63-a liquid outlet pipe; 64-grooves; 65-an annular seal groove; 66-O-shaped sealing rings; 67-engaging the cavity region; 68-engaging the cavity region; 70-pressing plate; 71-opening.
Detailed Description
The present utility model is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
As shown in fig. 1 to 7, a gear injection pump of the present embodiment includes: the device comprises a base 1, a motor 2 arranged at a first end (right end in fig. 2) of the base 1, a gear shaft 3 arranged on the base 1 and in driving connection with an output shaft of the motor 2, an outer gear rotor 4 in driving connection with the gear shaft 3, an inner gear rotor 5 sleeved on the outer gear rotor 4 and a liquid path block 6 connected with a second end (left end in fig. 2) of the base 1;
the external gear rotor 4 and the internal gear rotor 5 are eccentrically arranged, the external gear part 40 at the outer periphery of the external gear rotor 4 is eccentrically meshed with the internal gear part 50 at the inner periphery of the internal gear rotor 5, and the meshing and out-of-mesh positions of the external gear part 40 and the internal gear part 50 are fixed, so that a meshing out cavity area 67 and a meshing in cavity area 68 which are symmetrical with each other are formed between the external gear part 40 and the internal gear part 50;
the liquid path block 6 has a liquid inlet channel 60 communicating with the engaged cavity region 67 and a liquid outlet channel 61 communicating with the engaged cavity region 68, and the liquid path block 6 has a liquid inlet pipe 62 communicating with the liquid inlet channel 60 and a liquid outlet pipe 63 communicating with the liquid outlet channel 61 at its end.
Wherein, drive connection through shaft coupling 20 between the output shaft of gear shaft 3 and motor 2 is provided with bearing 11 on the base 1, thereby gear shaft 3 pass bearing 11 rotatable coupling on base 1, still is provided with rotor holder 12 between the periphery of internal gear rotor 5 and base 1 to make external gear rotor 4 and internal gear rotor 5 rotate in the space that defines.
Wherein, the end of the base 1 is provided with a boss 10, the end of the liquid path block 6 is provided with a groove 64 for the projection to be inserted, the liquid path block 6 is sleeved with a shell 7 in threaded connection with the base 1, and a pressing plate 70 at the side part (left side in fig. 4) of the shell 7 is contacted with the outer end surface of the liquid path block 6. The pressure plate 70 is provided with openings 71 through which the liquid inlet pipe 62 and the liquid outlet pipe 63 extend. After the base 1 is connected with the liquid path block 6, the convex blocks are matched and inserted into the grooves 64 to realize positioning and fixing so as to prevent the liquid path block 6 from rotating relative to the base 1, and then the left side of the liquid path block 6 is extruded by screwing the shell 7 by using the pressing plate 70 to realize the fixed connection of the liquid path block 6 on the base 1.
The right end of the liquid path block 6 is provided with an annular sealing groove 65, an O-shaped sealing ring 66 is arranged in the annular sealing groove 65 in a matched mode, and the annular sealing groove 65 is located on the periphery of the rotor retainer 12. The O-shaped sealing ring 66 is used for sealing the liquid path block 6 with the left end surfaces of the external gear rotor 4 and the internal gear rotor 5; the gear shaft 3 is sleeved with a sealing gasket 30, the sealing gasket 30 is in contact with the end surfaces (right end surfaces in fig. 2) of the outer gear rotor 4 and the inner gear rotor 5, which are far away from the liquid path block 6, the sealing gasket 30 seals the right end surfaces of the outer gear rotor 4 and the inner gear rotor 5, namely, an engaged cavity area 67 and an engaged cavity area 68 formed by cavities between the outer gear rotor 4 and the inner gear rotor 5 are kept sealed through an O-shaped sealing ring 66 and the sealing gasket 30, only the liquid inlet channel 60 is communicated with the engaged cavity area 67, and the liquid outlet channel 61 is communicated with the engaged cavity area 68.
The principle of the gear injection pump is described below with reference to fig. 2 and 7:
an output shaft of the motor 2 drives the gear shaft 3 to rotate through the coupler 20, the gear shaft 3 drives the outer gear rotor 4 to rotate, and the outer gear rotor 4 drives the inner gear rotor 5 meshed with the outer gear rotor 4 to rotate;
wherein the external gear rotor 4 and the internal gear rotor 5 are not coaxially installed, but are eccentrically installed (the axes are shown as O and O' in the figure respectively), so that the external gear portion 40 at the outer periphery of the external gear rotor 4 is eccentrically meshed with the internal gear portion 50 at the inner periphery of the internal gear rotor 5, and the meshing and meshing positions of the external gear portion 40 and the internal gear portion 50 are fixed; as shown in the figure, the lowest pair of teeth (bottom tooth pair) is always in a state of meshing transmission torque, while the uppermost tooth top is contacted with the tooth root (top tooth pair) of the outer gear and does not interfere, so that two symmetrical closed spaces are formed by taking the bottom tooth pair and the top tooth pair as boundaries: the right side is a meshed-in cavity area 68 and is communicated with the liquid outlet channel 61; on the left is an engaged cavity region 67 and communicates with the inlet flow channel 60. So that the liquid is transported by the rotation of the external gear rotor 4 and the internal gear rotor 5.
It should be understood that the number of gear teeth of the inner gear rotor 5 and the outer gear rotor 4 in fig. 7 is only one example, and that other tooth number designs can be employed in the present utility model; for example, the number of teeth is increased to achieve smoother engagement.
Example 2
Referring to fig. 8, the present embodiment provides a gear injection pump system including the gear injection pump of embodiment 1, a flow rate sensor 8 connected to a liquid outlet pipe 63 of the gear injection pump, and a controller 9 connecting the flow rate sensor 8 and a motor 2 of the gear injection pump.
The flow rate sensor 8 is used for detecting the flow rate of the liquid outlet pipe 63, and is a conventional product, for example, the model is kenji FD-X; the controller 9 is used for controlling the rotating speed of the motor 2 according to the feedback of the flow rate sensor 8 so as to realize quantitative transfusion, and the controller 9 can be a conventional product, for example, the model is Pufeid RCMF-1.
The flow rate of the liquid output by the liquid outlet pipe 63 of the gear injection pump is detected by the flow rate sensor 8, and after the flow rate is fed back to the controller 9, the controller 9 controls the rotating speed of the motor 2 so that the flow rate of the liquid outlet pipe 63 is regulated to a set value, thereby realizing quantitative transfusion.
Although embodiments of the present utility model have been disclosed above, it is not limited to the use of the description and embodiments, it is well suited to various fields of use for the utility model, and further modifications may be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the particular details without departing from the general concepts defined in the claims and the equivalents thereof.
Claims (10)
1. A gear injection pump comprising: the device comprises a base, a motor arranged at a first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an external gear rotor in driving connection with the gear shaft, an internal gear rotor sleeved on the external gear rotor and a liquid path block connected with a second end of the base;
the external gear rotor and the internal gear rotor are eccentrically arranged, the external gear part at the outer periphery of the external gear rotor is eccentrically meshed with the internal gear part at the inner periphery of the internal gear rotor, and the meshing-in and meshing-out positions of the external gear part and the internal gear part are fixed, so that a meshing-out cavity area and a meshing-in cavity area which are symmetrical with each other are formed between the external gear part and the internal gear part;
the liquid path block is internally provided with a liquid inlet channel communicated with the meshing cavity area and a liquid outlet channel communicated with the meshing cavity area, and the end part of the liquid path block is provided with a liquid inlet pipe communicated with the liquid inlet channel and a liquid outlet pipe communicated with the liquid outlet channel.
2. The gear injection pump of claim 1 wherein the end of the base is provided with a boss and the end of the liquid block is provided with a recess into which the boss is inserted in a mating manner.
3. The gear injection pump of claim 2 wherein the gear shaft is drivingly connected to the output shaft of the motor by a coupling.
4. A gear injection pump according to claim 3, wherein a bearing is provided between the gear shaft and the base.
5. The gear injection pump of claim 4 wherein a rotor cage is also disposed between the gerotor and the base.
6. The gear injection pump of claim 5 wherein an annular seal groove is provided at an end of the fluid circuit block, an O-ring is cooperatively disposed within the annular seal groove, and the annular seal groove is located at the periphery of the rotor holder.
7. The gear injection pump of claim 1 wherein the liquid path block is sleeved with a housing threadably connected to the base, and wherein a pressure plate on the side of the housing contacts the outer end surface of the liquid path block.
8. The gear injection pump of claim 7 wherein said pressure plate defines openings through which said inlet and outlet tubes extend.
9. The gear injection pump of claim 1 wherein the gear shaft is sleeved with a sealing gasket, the sealing gasket contacting an end face of the side of the outer gear rotor and the inner gear rotor away from the liquid path block.
10. A gear injection pump system comprising a gear injection pump according to any one of claims 1-9, a flow rate sensor connected to a liquid outlet pipe of the gear injection pump, and a controller connecting the flow rate sensor and a motor of the gear injection pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222596185.XU CN219847643U (en) | 2022-09-29 | 2022-09-29 | Gear injection pump and gear injection pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222596185.XU CN219847643U (en) | 2022-09-29 | 2022-09-29 | Gear injection pump and gear injection pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219847643U true CN219847643U (en) | 2023-10-20 |
Family
ID=88339204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222596185.XU Active CN219847643U (en) | 2022-09-29 | 2022-09-29 | Gear injection pump and gear injection pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219847643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115501429A (en) * | 2022-09-29 | 2022-12-23 | 郑州中科生物医学工程技术研究院 | Gear injection pump and system |
-
2022
- 2022-09-29 CN CN202222596185.XU patent/CN219847643U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115501429A (en) * | 2022-09-29 | 2022-12-23 | 郑州中科生物医学工程技术研究院 | Gear injection pump and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219847643U (en) | Gear injection pump and gear injection pump system | |
| US4747744A (en) | Magnetic drive gerotor pump | |
| JPS6151159B2 (en) | ||
| WO2021208286A1 (en) | Pulse water pump and water flosser | |
| CN114483512B (en) | Miniature water hydraulic pump | |
| CN214944872U (en) | Diaphragm pump body for oral care implement | |
| KR100481555B1 (en) | Inverse toothed rotor set | |
| CN115501429A (en) | Gear injection pump and system | |
| CN101078398A (en) | Rolling extrusion soft variable-volume fluid mechanical device | |
| CN111097082A (en) | Conveying metering device and infusion device | |
| JPH01104991A (en) | Variable displacement gear pump | |
| US5252047A (en) | Gear pump with controlled clamping force | |
| CN215633578U (en) | Miniature duplex plunger pump body | |
| KR102145566B1 (en) | Positive displacement pump for recirculating leaking fluids and increasing watertight effect | |
| CN210013822U (en) | Sliding bearing for melt gear pump and melt gear pump comprising sliding bearing | |
| CN221033090U (en) | Gear pump with inner and outer ring closed thrust compensation | |
| CN215292861U (en) | Internal gear pump | |
| CN216381832U (en) | Internal gear pump | |
| CN201206544Y (en) | Polygon rotor pump of planet epicyclic train | |
| CN215370209U (en) | High-speed axial plunger pump of porous drainage formula | |
| CN218439734U (en) | Compact type internal gear oil pump | |
| EP0701661B1 (en) | Gear pump with controlled clamping force | |
| CN212406958U (en) | Synchronous belt constant delivery pump | |
| CN217761233U (en) | Miniature duplex plunger pump | |
| CN220248346U (en) | Gear conveying mechanism for liquid and gear pump comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |