CN201271411Y - High precision syringe or syringe pump - Google Patents

High precision syringe or syringe pump Download PDF

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Publication number
CN201271411Y
CN201271411Y CNU2008202002321U CN200820200232U CN201271411Y CN 201271411 Y CN201271411 Y CN 201271411Y CN U2008202002321 U CNU2008202002321 U CN U2008202002321U CN 200820200232 U CN200820200232 U CN 200820200232U CN 201271411 Y CN201271411 Y CN 201271411Y
Authority
CN
China
Prior art keywords
piston rod
syringe
motor
cylindrical shell
stepping motor
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.)
Expired - Fee Related
Application number
CNU2008202002321U
Other languages
Chinese (zh)
Inventor
朱建卫
张卫东
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.)
GUANGZHOU MAIGAO MEDICAL APPLIANCES CO Ltd
Original Assignee
GUANGZHOU MAIGAO MEDICAL APPLIANCES CO Ltd
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 GUANGZHOU MAIGAO MEDICAL APPLIANCES CO Ltd filed Critical GUANGZHOU MAIGAO MEDICAL APPLIANCES CO Ltd
Priority to CNU2008202002321U priority Critical patent/CN201271411Y/en
Application granted granted Critical
Publication of CN201271411Y publication Critical patent/CN201271411Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a high-precision injector or an injector pump; the injector is characterized in that: the injector comprises a cylinder body and a stepping motor connected with the cylinder body, and at least one liquid inlet/ outlet port is arranged on the cylinder body wall; the injector further comprises a piston rod and a sealing ring; the radius of cross section of the piston rod is less than the radius of cross section of the inner cavity of the cylinder body; one end of the piston rod is connected with the stepping motor, and the other end penetrates through the inner cavity of the cylinder body, and the sealing ring is arranged between the and the piston rod. The injector or the injector pump has the beneficial effects of no abrasion, high precision and low cost.

Description

A kind of high accuracy syringe or syringe pump
Technical field
This utility model relates to a kind of injection device, can be widely used in fields such as medicine, accurate chemical industry.
Background technology
Plain edition syringe or syringe pump are for guaranteeing sealing and precision, and in the process of piston up-down, piston must closely contact with the inner cylindrical shell of syringe, and this has just caused following several problem:
1, wearing for piston is bigger, and the general life-span can not be applicable to long-time high-frequency use, maybe must rely on the material and the processing technique of special expensive.
2, the raising piston along with required precision must be more and more thinner, is inversely proportional to but the compactness of piston and the injection pressure that produced are thicknesses with piston.So limited the use of automatic injector in the high accuracy place.
3, piston must be non-durable consumable goods.
4, must design the syringe installing rack and just can use motor that syringe is driven, increase production cost.And increased the influence of machining, assembling to the syringe precision.
5, piston produces the slit in case wear and tear between back and injector cartridge, and the liquid of the inside is leaked, and influences the precision of syringe greatly.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, proposes a kind of high accuracy syringe or syringe pump, and it is minimum to wear and tear, and production cost is low.
The technical solution adopted in the utility model is as follows:
A kind of high accuracy syringe or syringe pump comprise a cylindrical shell and the motor that links to each other with cylindrical shell, and barrel wall is provided with at least one feed liquor/liquid outlet; Also comprise piston rod and sealing ring, the cross section radius of described piston rod is less than the cross section radius of the inner chamber of described cylindrical shell, and piston rod one end links to each other with motor, and the other end penetrates the inner chamber of described cylindrical shell, and described sealing ring is arranged between cylindrical shell and the piston rod.The part outside that piston rod is in the motor is with the piston guide pipe.Adopt contactless the connection between piston rod and cylindrical shell.
On described cylindrical shell and wall that motor links to each other, be provided with the piston passage.
Described motor comprises fixedly shaft type linear stepping motor bearing, fixedly shaft type linear stepping motor coil, fixedly shaft type linear stepping motor rotor and fixing shaft type linear stepping motor screw rod, and fixedly shaft type linear stepping motor screw rod links to each other with piston rod.Also be provided with the playback pick off in motor, described motor screw is provided with playback pick off catch.
The cross section radius of piston rod of the present utility model is less than the cross section radius of cylinder lumen, moving up and down by piston rod during work, change the volume that piston rod takies at cylinder lumen, because the cumulative volume of cylinder lumen is constant, the variation that piston rod takies volume at cylinder lumen has caused the respective change of interior intracavity liquid volume, and liquid flows into by feed liquor/liquid outlet or flows out; Because the piston rod cross-sectional area is very little, by motor can very accurate control piston bar in the length of cylinder lumen, thereby controlling liquid flows into or effusive dosage.Piston rod only closely cooperates with sealing ring, and direct and the direct contact friction of cylinder inboard wall have reduced the wearing and tearing of piston rod greatly, so and sealing ring thickness has only 3mm frictional force little, durable degree increase.Used pottery as piston material, made the hardness of piston only, and the surface flatness of pottery is much larger than materials such as rubber or metals much larger than the piston cushion rubber, like this for the also greatly reduction of wearing and tearing of piston cushion rubber itself, the life-span of the cushion rubber of prolongation.Adopting outside framework oil seal is the piston cushion rubber, can leave the part surplus in design, makes the life-span of cushion rubber further obtain prolonging.
Because syringe piston rod does not contact with the syringe cylinder intracoelomic cavity, when not simultaneously to the syringe required precision, the piston rod that only needs to change different thicknesses gets final product with the piston rod cushion rubber of different sizes, need not the syringe cavity changed to have reduced processing, cooperation requirement greatly.
Syringe body and driver part combination, production cost reduces, and has reduced the influence of machining error to the syringe precision.
In brief, the beneficial effects of the utility model are: adopt contactless the connection between piston rod and cylindrical shell, do not have wearing and tearing, high accuracy, low cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The structure of syringe is referring to Fig. 1, mainly comprise cylindrical shell 13 and motor 14 two parts, cylindrical shell 13 is provided with two feed liquor/ liquid outlets 1 and 2, also comprise piston rod 3 and sealing ring 4, the cross section radius of piston rod 3 is less than the cross section radius of the inner chamber of cylindrical shell 13, piston rod 3 one ends link to each other with motor 14, and the other end penetrates the inner chamber of cylindrical shell 13, and sealing ring 4 is arranged between cylindrical shell 13 and the piston rod 3.The part outside that piston rod 3 is in the motor 14 is with piston guide pipe 5.On described cylindrical shell 13 and wall that motor 14 links to each other, be provided with piston passage 6.
Described motor 14 comprises fixedly shaft type linear stepping motor bearing 9, fixedly shaft type linear stepping motor coil 10, fixedly shaft type linear stepping motor rotor 11 and fixing shaft type linear stepping motor screw rod 12, and fixedly shaft type linear stepping motor screw rod 12 links to each other with piston rod 3.Also be provided with playback pick off 7 in motor 14, described motor screw 12 is provided with playback pick off catch 8.

Claims (5)

1, a kind of high accuracy syringe or syringe pump is characterized in that: comprise a cylindrical shell and the motor that links to each other with cylindrical shell, barrel wall is provided with at least one feed liquor/liquid outlet; Also comprise piston rod and sealing ring, the cross section radius of described piston rod is less than the cross section radius of the inner chamber of described cylindrical shell, and piston rod one end links to each other with motor, and the other end penetrates the inner chamber of described cylindrical shell, and described sealing ring is arranged between cylindrical shell and the piston rod; Adopt contactless the connection between piston rod and cylindrical shell.
2, a kind of high accuracy syringe as claimed in claim 1 or syringe pump is characterized in that: the part outside that piston rod is in the motor is with the piston guide pipe.
3, a kind of high accuracy syringe as claimed in claim 1 or syringe pump is characterized in that: be provided with the piston passage on described cylindrical shell and wall that motor links to each other.
4, as claim 1 or 2 or 3 described a kind of high accuracy syringe or syringe pumps, it is characterized in that: described motor comprises fixedly shaft type linear stepping motor bearing, fixedly shaft type linear stepping motor coil, fixedly shaft type linear stepping motor rotor and fixing shaft type linear stepping motor screw rod, and fixedly shaft type linear stepping motor screw rod links to each other with piston rod.
5, a kind of high accuracy syringe as claimed in claim 4 or syringe pump is characterized in that: also be provided with the playback pick off in motor, described motor screw is provided with playback pick off catch.
CNU2008202002321U 2008-09-08 2008-09-08 High precision syringe or syringe pump Expired - Fee Related CN201271411Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008202002321U CN201271411Y (en) 2008-09-08 2008-09-08 High precision syringe or syringe pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008202002321U CN201271411Y (en) 2008-09-08 2008-09-08 High precision syringe or syringe pump

Publications (1)

Publication Number Publication Date
CN201271411Y true CN201271411Y (en) 2009-07-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008202002321U Expired - Fee Related CN201271411Y (en) 2008-09-08 2008-09-08 High precision syringe or syringe pump

Country Status (1)

Country Link
CN (1) CN201271411Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101690834B (en) * 2009-10-29 2012-02-15 陈凯 Continuous needleless injection system driven by electromagnetic force
CN105092872A (en) * 2014-04-17 2015-11-25 湖南长沙天地人生物科技有限公司 Automatic sample injection instrument and rotating lifting assembly thereof
CN112058329A (en) * 2020-08-11 2020-12-11 长沙仪秀兴智能科技有限公司 Piston type liquid-transfering gun with multiple discharge
CN112058328A (en) * 2020-08-11 2020-12-11 长沙仪秀兴智能科技有限公司 Piston type liquid transferring gun capable of improving liquid transferring precision
CN112108198A (en) * 2020-08-11 2020-12-22 长沙仪秀兴智能科技有限公司 Double-discharge high-precision piston type liquid-transfering gun

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101690834B (en) * 2009-10-29 2012-02-15 陈凯 Continuous needleless injection system driven by electromagnetic force
CN105092872A (en) * 2014-04-17 2015-11-25 湖南长沙天地人生物科技有限公司 Automatic sample injection instrument and rotating lifting assembly thereof
CN112058329A (en) * 2020-08-11 2020-12-11 长沙仪秀兴智能科技有限公司 Piston type liquid-transfering gun with multiple discharge
CN112058328A (en) * 2020-08-11 2020-12-11 长沙仪秀兴智能科技有限公司 Piston type liquid transferring gun capable of improving liquid transferring precision
CN112108198A (en) * 2020-08-11 2020-12-22 长沙仪秀兴智能科技有限公司 Double-discharge high-precision piston type liquid-transfering gun

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090715

Termination date: 20100908