CN115501429A - Gear injection pump and system - Google Patents

Gear injection pump and system Download PDF

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Publication number
CN115501429A
CN115501429A CN202211202060.2A CN202211202060A CN115501429A CN 115501429 A CN115501429 A CN 115501429A CN 202211202060 A CN202211202060 A CN 202211202060A CN 115501429 A CN115501429 A CN 115501429A
Authority
CN
China
Prior art keywords
gear
rotor
base
liquid
path block
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.)
Pending
Application number
CN202211202060.2A
Other languages
Chinese (zh)
Inventor
何大永
郭栋祥
罗刚银
王弼陡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Zhongke Biomedical Engineering Technology Research Institute
Original Assignee
Zhengzhou Zhongke Biomedical Engineering Technology Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhengzhou Zhongke Biomedical Engineering Technology Research Institute filed Critical Zhengzhou Zhongke Biomedical Engineering Technology Research Institute
Priority to CN202211202060.2A priority Critical patent/CN115501429A/en
Publication of CN115501429A publication Critical patent/CN115501429A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3129—Syringe barrels
    • A61M5/3134—Syringe barrels characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3146—Priming, e.g. purging, reducing backlash or clearance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/206—With automatic needle insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3334—Measuring or controlling the flow rate

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Rotary Pumps (AREA)

Abstract

The invention discloses a gear injection pump, comprising: the hydraulic pump comprises a base, a motor arranged at the first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an outer gear rotor in driving connection with the gear shaft, an inner gear rotor sleeved on the outer gear rotor and a liquid path block connected with the second end of the base. The invention also provides a gear syringe pump system, which comprises a gear syringe pump, a flow rate sensor and a controller. The gear injection pump provided by the invention 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-suction performance, does not need to be filled with liquid before the pump is started every time, and can reduce the number of valves; the gear injection pump has a 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 invention can realize accurate quantitative control of infusion liquid, and has a good application prospect.

Description

Gear injection pump and system
Technical Field
The invention relates to the field of medical instruments, in particular to a gear injection pump and a gear injection system.
Background
Syringe pumps deliver small amounts of fluid accurately, uniformly and consistently, often in medical infusion and dosing techniques where a constant flow rate needs to be maintained. The prior injection pump generally has the following defects: the injection pipeline is complex and difficult to clean; the structure 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 transport accuracy receives the influence.
Disclosure of Invention
The present invention provides a gear injection pump and a gear injection system, which are designed to overcome the above-mentioned deficiencies in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a gear syringe pump comprising: the hydraulic pump comprises a base, a motor arranged at the first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an outer gear rotor in driving connection with the gear shaft, an inner gear rotor sleeved on the outer gear rotor and a liquid path block connected with the second end of the base;
the external gear rotor and the internal gear rotor are eccentrically arranged, an external gear part on the outer periphery of the external gear rotor is eccentrically meshed with an internal gear part on the inner periphery of the internal gear rotor, and the meshing positions of the external gear part and the internal gear part are fixed, so that a meshing cavity region and a meshing cavity region which are symmetrical to 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 flow passage communicated with the cavity region where the liquid path block is meshed out and a liquid outlet flow passage communicated with the cavity region where the liquid path block is meshed in, and the end part of the liquid path block is provided with a liquid inlet pipe communicated with the liquid inlet flow passage and a liquid outlet pipe communicated with the liquid outlet flow passage.
Preferably, the end of the base is provided with a boss, and the end of the liquid path block is provided with a groove for the boss to be inserted in a matching way.
Preferably, the gear shaft is in driving connection with an output shaft of the motor through a coupling.
Preferably, a bearing is arranged between the gear shaft and the base.
Preferably, a rotor retainer is further disposed between the internal gear rotor and the base.
Preferably, an annular sealing groove is formed in the end 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 on the periphery of the rotor holder.
Preferably, the liquid path block is sleeved with a housing in threaded connection with the base, and a pressure plate on the side of the housing is in contact with the outer end face of the liquid path block.
Preferably, the pressing 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 faces of the outer gear rotor and the inner gear rotor on the side far away from the liquid path block.
The invention also provides a gear injection pump system which comprises the gear injection pump, a flow rate sensor connected with the liquid outlet pipe of the gear injection pump and a controller connected with the flow rate sensor and the motor of the gear injection pump.
The invention has the beneficial effects that:
the gear injection pump provided by the invention 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-suction performance, does not need to be filled with liquid before the pump is started every time, and can reduce the number of valves;
the gear injection pump has a 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 invention can realize accurate quantitative control of infusion liquid, and has a good application prospect.
Drawings
FIG. 1 is a schematic diagram of the construction of a gear injection pump of the present invention;
FIG. 2 is a schematic cross-sectional view of the gear syringe pump of the present invention;
FIG. 3 is an exploded view of the gear syringe pump of the present invention;
FIG. 4 is an exploded view of another perspective of the gear syringe pump of the present invention;
FIG. 5 is a schematic view of the structure of the base of the present invention cooperating with the external gear rotor and the internal gear rotor;
FIG. 6 is a schematic structural diagram of a fluid path block according to the present invention;
FIG. 7 is a schematic view of the external gear rotor and internal gear rotor of the present invention;
fig. 8 is a schematic diagram of a gear syringe pump system of the present invention.
Description of reference numerals:
1-a base; 2, a motor; 3-a gear shaft; 4-external gear rotor; 5-an internal gear rotor; 6-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 portion; 50-an inner gear portion; 60-liquid inlet flow channel; 61-liquid outlet flow channel; 62-liquid inlet pipe; 63-a liquid outlet pipe; 64, a groove; 65-annular seal groove; 66-O-ring seal; 67-engaging out a cavity region; 68-engaging into the cavity region; 70, pressing a plate; 71-open.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference 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 combinations 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 figure 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 external gear rotor 4 in driving connection with the gear shaft 3, an internal gear rotor 5 sleeved on the external gear rotor 4 and a liquid path block 6 connected with a second end (left end in figure 2) of the base 1;
the external gear rotor 4 and the internal gear rotor 5 are eccentrically arranged, the external gear part 40 on the outer periphery of the external gear rotor 4 is eccentrically meshed with the internal gear part 50 on the inner periphery of the internal gear rotor 5, and the meshing and meshing positions of the external gear part 40 and the internal gear part 50 are fixed, so that a meshing cavity region 67 and a meshing cavity region 68 which are symmetrical to each other are formed between the external gear part 40 and the internal gear part 50;
the liquid path block 6 is internally provided with a liquid inlet flow passage 60 communicated with the cavity region 67 for meshing and a liquid outlet flow passage 61 communicated with the cavity region 68 for meshing, and the end part of the liquid path block 6 is provided with a liquid inlet pipe 62 communicated with the liquid inlet flow passage 60 and a liquid outlet pipe 63 communicated with the liquid outlet flow passage 61.
The gear shaft 3 is in driving connection with an output shaft of the motor 2 through the coupling 20, the bearing 11 is arranged on the base 1, the gear shaft 3 penetrates through the bearing 11 and is rotatably connected to the base 1, and the rotor retainer 12 is further arranged between the periphery of the internal gear rotor 5 and the base 1, so that the external gear rotor 4 and the internal gear rotor 5 rotate in a limited space.
Wherein, the tip of base 1 is provided with boss 10, and the tip of liquid way piece 6 is seted up and is supplied the lug cooperation male recess 64, and the cover is equipped with shell 7 with base 1 threaded connection on the liquid way piece 6, and the clamp plate 70 of the lateral part (left side in fig. 4) of shell 7 and the outer terminal surface contact of liquid way piece 6. The pressing plate 70 is provided with an opening 71 for the liquid inlet pipe 62 and the liquid outlet pipe 63 to extend out. After the base 1 is connected with the liquid path block 6, the lug is matched with the inserted groove 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 pressing plate 70 is used for extruding the left side of the liquid path block 6 by screwing the shell 7 to realize the fixed connection of the liquid path block 6 on the base 1.
Wherein, 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 matching manner, and the annular sealing groove 65 is positioned on the periphery of the rotor holder 12. The O-shaped sealing ring 66 is used for realizing the sealing between the liquid path block 6 and the left end faces 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 faces (right end faces in fig. 2) of the sides, far away from the liquid path block 6, of the external gear rotor 4 and the internal gear rotor 5, and the sealing gasket 30 realizes the sealing of the right end faces of the external gear rotor 4 and the internal gear rotor 5, namely, a meshing cavity region 67 and a meshing cavity region 68 formed by cavities between the external gear rotor 4 and the internal gear rotor 5 are kept sealed through an O-shaped sealing ring 66 and the sealing gasket 30, and only the liquid inlet flow channel 60 is communicated with the meshing cavity region 67, and the liquid outlet flow channel 61 is communicated with the meshing cavity region 68.
The principle of the gear injection pump is explained below with reference to fig. 2 and 7:
an output shaft of the motor 2 drives a gear shaft 3 to rotate through a coupler 20, the gear shaft 3 drives an outer gear rotor 4 to rotate, and the outer gear rotor 4 drives an inner gear rotor 5 meshed with the outer gear rotor to rotate;
wherein, the external gear rotor 4 and the internal gear rotor 5 are not coaxially mounted, but eccentrically mounted (the axes are respectively shown as O and O' in the figure), 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 position between the external gear portion 40 and the internal gear portion 50 is fixed; as shown in the figure, the lowest pair of teeth (bottom pair) is always in a state of meshing transmission torque, and the tooth top is contacted with the tooth root (top pair) of the outer gear without interference, so that two symmetrical closed spaces are formed by taking the bottom pair of teeth and the top pair of teeth as boundaries: the right side is a cavity engaging area 68 and is communicated with the liquid outlet flow passage 61; the left side is a meshed cavity area 67 and is communicated with the liquid inlet flow channel 60. So that the delivery of the liquid is achieved by the rotation of the external gear rotor 4 and the internal gear rotor 5.
It should be understood that the number of teeth of the inner gear rotor 5 and the outer gear rotor 4 in fig. 7 is only an example, and the present invention may adopt other designs; for example, the number of teeth is increased to achieve smoother engagement.
Example 2
Referring to fig. 8, the present embodiment provides a gear syringe pump system comprising the gear syringe pump of embodiment 1, a flow rate sensor 8 connected to a liquid outlet pipe 63 of the gear syringe pump, and a controller 9 connecting the flow rate sensor 8 and a motor 2 of the gear syringe pump.
Wherein, the flow velocity sensor 8 is used for detecting the flow velocity of the liquid outlet pipe 63, and can be a conventional product, for example, the model is kiren 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 infusion, and the controller 9 can be a conventional product, such as a product with the model number of Pofeld RCMF-1.
The liquid output from the liquid outlet pipe 63 of the gear injection pump is detected by the flow velocity sensor 8, and after the flow velocity is fed back to the controller 9, the controller 9 controls the rotating speed of the motor 2, so that the flow velocity of the liquid outlet pipe 63 is adjusted to a set value, and quantitative infusion is realized.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims (10)

1. A gear syringe pump, comprising: the hydraulic pump comprises a base, a motor arranged at the first end of the base, a gear shaft arranged on the base and in driving connection with an output shaft of the motor, an outer gear rotor in driving connection with the gear shaft, an inner gear rotor sleeved on the outer gear rotor and a liquid path block connected with the second end of the base;
the external gear rotor and the internal gear rotor are eccentrically arranged, an external gear part on the outer periphery of the external gear rotor is eccentrically meshed with an internal gear part on the inner periphery of the internal gear rotor, and the meshing positions of the external gear part and the internal gear part are fixed, so that a meshing cavity region and a meshing cavity region which are symmetrical to 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 flow channel communicated with the cavity engaging region and a liquid outlet flow channel communicated with the cavity engaging region, and the end part of the liquid path block is provided with a liquid inlet pipe communicated with the liquid inlet flow channel and a liquid outlet pipe communicated with the liquid outlet flow channel.
2. The gear injection pump of claim 1, wherein a boss is disposed at an end of the base, and a groove for the boss to be inserted into is disposed at an end of the liquid path block.
3. The gear syringe pump of claim 2 wherein said gear shaft is drivingly connected to said output shaft of said motor by a coupling.
4. The gear syringe pump of claim 3 wherein a bearing is disposed between the gear shaft and the base.
5. The gear injection pump of claim 4 wherein a rotor cage is further disposed between said internal gear rotor and said base.
6. The gear injection pump of claim 1, wherein an annular sealing groove is formed at an end of the liquid path block, an O-ring is disposed in the annular sealing groove in a matching manner, and the annular sealing groove is located at the periphery of the rotor holder.
7. The gear injection pump of claim 1, wherein the fluid path block is sleeved with a housing in threaded connection with the base, and a pressure plate at the side of the housing is in contact with the outer end face of the fluid path block.
8. The gear injection pump of claim 7, wherein the pressure plate defines openings through which the inlet and outlet pipes extend.
9. The gear injection pump of claim 1, wherein the gear shaft is sleeved with a sealing gasket, and the sealing gasket is in contact with end faces of the outer gear rotor and the inner gear rotor on the side far away from the liquid path block.
10. A gear syringe pump system comprising a gear syringe pump according to any of claims 1-9, a flow rate sensor connected to a discharge conduit of the gear syringe pump, and a controller connecting the flow rate sensor and a motor of the gear syringe pump.
CN202211202060.2A 2022-09-29 2022-09-29 Gear injection pump and system Pending CN115501429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211202060.2A CN115501429A (en) 2022-09-29 2022-09-29 Gear injection pump and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211202060.2A CN115501429A (en) 2022-09-29 2022-09-29 Gear injection pump and system

Publications (1)

Publication Number Publication Date
CN115501429A true CN115501429A (en) 2022-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211202060.2A Pending CN115501429A (en) 2022-09-29 2022-09-29 Gear injection pump and system

Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111183287A (en) * 2018-02-14 2020-05-19 斯泰克波尔国际工程产品有限公司 Cycloid pump with mandrel
CN111295516A (en) * 2017-09-20 2020-06-16 海斯迈股份公司 Rotary pump driven drug delivery device
CN113931836A (en) * 2020-07-13 2022-01-14 通用汽车环球科技运作有限责任公司 Hydraulic gerotor pump for an automatic transmission
CN219847643U (en) * 2022-09-29 2023-10-20 郑州中科生物医学工程技术研究院 Gear injection pump and gear injection pump system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111295516A (en) * 2017-09-20 2020-06-16 海斯迈股份公司 Rotary pump driven drug delivery device
CN111183287A (en) * 2018-02-14 2020-05-19 斯泰克波尔国际工程产品有限公司 Cycloid pump with mandrel
CN113931836A (en) * 2020-07-13 2022-01-14 通用汽车环球科技运作有限责任公司 Hydraulic gerotor pump for an automatic transmission
CN219847643U (en) * 2022-09-29 2023-10-20 郑州中科生物医学工程技术研究院 Gear injection pump and gear injection pump system

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