CN113289148A - Adjustable sealing compensation syringe - Google Patents
Adjustable sealing compensation syringe Download PDFInfo
- Publication number
- CN113289148A CN113289148A CN202110490714.5A CN202110490714A CN113289148A CN 113289148 A CN113289148 A CN 113289148A CN 202110490714 A CN202110490714 A CN 202110490714A CN 113289148 A CN113289148 A CN 113289148A
- Authority
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- China
- Prior art keywords
- connector
- piston
- cylinder body
- rubber ring
- piston rod
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- 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.)
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Classifications
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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
-
- 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
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
Landscapes
- 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)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses an adjustable sealing compensation injector which comprises an injector cylinder body, wherein a piston rod is connected in the injector cylinder body in a sliding manner, the piston rod is connected with a fixed connector through threads, a sliding hole is formed in the periphery of the fixed connector, a thrust rod is installed in the sliding hole, the other side of the fixed connector is connected with an inverted connector through threads, the inverted connector is provided with a groove, a rubber ring is installed in the groove, an extrusion flat gasket is movably connected to one side of the rubber ring of the inverted connector, and the inverted connector is connected with a piston. The invention has the beneficial effects that: the axial compression amount of the rubber ring can be controlled through the screwing size of the fixed connector and the piston rod, and further the radial compression amount of the rubber ring is controlled, so that the degree of tightness of the piston and the injector cylinder body can be adjusted, the problems that sealing compensation is not available in the first scheme and the piston head is prone to failure can be solved, and the problems that the fixed sealing compensation piston head in the second scheme is prone to scratch when entering the cylinder body and the sealing compensation amount is difficult to control can also be solved.
Description
Technical Field
The invention belongs to the technical field of syringes, and particularly relates to an adjustable seal compensation syringe.
Background
At present, the sealing part of the miniature precision injector applied to the market mainly has two structures. One method is to precisely match and seal the piston head and the syringe cylinder body by fixing the piston head (as shown in figure 1), the scheme is that the syringe cylinder body 1, the piston head 2 and a piston rod part form a connector 3, the piston head 2 is connected with the piston rod 3 through threads, then the piston head is extruded into the syringe cylinder body 1, the piston rod is driven by a moving device to enable the piston head to reciprocate in the syringe cylinder body to realize the suction and discharge actions of liquid gas, the friction between the piston head and the syringe cylinder body is realized, the abrasion loss of the piston head is increased along with the increase of the suction and discharge actions, and finally a gap is generated between the piston head and the cylinder body, at the moment, the sealing function of the piston head is failed, the suction and discharge actions of the liquid gas cannot be realized, the other method is to precisely match and seal the connector between the piston head and the syringe cylinder body by an O-shaped rubber ring (as shown in figure 2), and the connector is formed by the connector 1, the piston 2, the connector 3, O type rubber circle 4 and piston rod part are constituteed 5, and back-off connector 3 passes through threaded connection with piston rod 5, puts into back-off connector recess with O type rubber circle 4, makes O type rubber circle level and smoothly be in free state, extrudees piston 2 above the back-off connector 3, makes it compress tightly the position end, and in the back-off embedding piston 2 on the back-off connector, make piston 2 link together with the back-off connector. At the moment, the O-shaped ring is subjected to radial pressure of the piston, the size of a radial groove of the O-shaped ring is fixed, and the O-shaped ring can only deform in the axial direction. The O-shaped ring deforms axially to increase the outer diameter of the piston. Then the piston head is extruded into the injector cylinder body 1, the piston rod is driven by a motion device to enable the piston head to reciprocate in the injector cylinder body, so that the suction and discharge actions of liquid gas are realized, the piston and the injector cylinder body rub, the abrasion loss of the piston is increased along with the increase of the suction and discharge actions, at the moment, the O-shaped rubber ring expands outwards to make up for the reduction of the outer diameter of the piston caused by abrasion, the piston can be normally used, if the piston is continuously abraded, the O-shaped ring reaches a free state and cannot continuously provide compensation for the piston, at the moment, a gap is generated between the piston and the cylinder body, the sealing function of the piston head is failed, the suction and discharge actions of the liquid gas cannot be realized, the piston head is extruded into the injector cylinder body 1, the outer diameter of the piston is at the maximum stage at the moment, the outer diameter is larger than the inner diameter of the injector cylinder body, and a certain external force must be applied when the piston head is extruded into the injector cylinder body, at the moment, the O-shaped ring is subjected to the internal pressure in the diameter direction, if the internal pressure of the O-shaped ring is higher at the moment, the compensation provided after the O-shaped ring enters the cylinder body is more, but a larger external force is required to be applied to extrude the O-shaped ring into the cylinder body, if the O-shaped ring is strongly extruded into the cylinder body, when the piston head enters the front end of the cylinder body, the front end of the cylinder body can scratch the cylindrical sealing surface of the piston head, the service life of the piston head can be reduced, the piston head can be directly failed seriously, the resistance is very high in the running process of the piston at the moment, the service life of the piston is also influenced, if the internal pressure of the O-shaped ring is lower, the piston head enters the front end of the cylinder body more easily, but the sealing compensation amount is smaller, and the service life of the piston head can be reduced. This is the contradiction of this scheme, and the volume of compressing of O type circle is difficult to control accurately.
Disclosure of Invention
In view of the problems raised by the above background art, the present invention is directed to: it is desirable to provide an adjustable seal compensating syringe.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
adjustable seal compensation syringe, including the syringe cylinder body, sliding connection has the piston rod in the syringe cylinder body, the piston rod has fixed connector through threaded connection, fixed connector border is equipped with the slide opening, install the distance rod in the slide opening, fixed connector's opposite side has the back-off connector through threaded connection, the back-off connector is equipped with the recess, install the rubber ring in the recess, the back-off connector has the extrusion flat pad at one side swing joint of rubber ring, the back-off connector even has the piston.
Further limited, the rubber ring is an O-shaped rubber ring. The structure design enables the rubber ring to have elasticity and compression.
Further inject, the back-off connector is equipped with the back-off, in the back-off embedding piston. The structural design makes the connection more stable.
Further inject, one side of syringe cylinder body is connected with the injection head, the injection head is equipped with the seal groove, install the sealing washer in the seal groove, the injection head is connected with presses the cover, it installs on the syringe cylinder body to press the cover to pass through screw locking. The structure design is convenient for replacing different injection heads.
Further inject, the opposite side of syringe cylinder body is connected with and takes the link plate, take and install the seal cover in the link plate, the piston rod is installed in the seal cover. The structure design is convenient to take and has a sealing effect.
Further, one side of the piston rod is connected with a pressing plate through threads in a locking mode. The structural design is convenient for pushing the piston rod.
The invention has the beneficial effects that: the axial compression amount of the rubber ring can be controlled through the screwing size of the fixed connector and the piston rod, and further the radial compression amount of the rubber ring is controlled, so that the degree of tightness of the piston and the injector cylinder body can be adjusted, the problems that sealing compensation is not available in the first scheme and the piston head is prone to failure can be solved, and the problems that the fixed sealing compensation piston head in the second scheme is prone to scratch when entering the cylinder body and the sealing compensation amount is difficult to control can also be solved.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic structural diagram of a piston head of a precision syringe without a seal compensation;
FIG. 2 is a schematic view of the structure of the piston head of the fixed seal compensation precision injector;
FIG. 3 is a schematic structural view of an adjustable seal compensation injector according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an adjustable seal compensation injector according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of an adjustable seal compensation injector according to an embodiment of the present invention;
the main element symbols are as follows:
the injection device comprises a syringe cylinder body 1, a piston 2, an inverted buckle connector 3, a rubber ring 4, an extrusion flat gasket 5, a thrust rod 6, a fixed connector 7, a piston rod 8, an injection head 9, a sealing ring 10, a pressing sleeve 11, a hanging plate 12, a sealing sleeve 13 and a pressing plate 14.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
As shown in fig. 3-5, the adjustable sealing compensation syringe comprises a syringe cylinder body 1, a piston rod 8 is slidably connected in the syringe cylinder body 1, the piston rod 8 is connected with a fixed connector 7 through a thread, a sliding hole is arranged on the periphery of the fixed connector 7, a thrust rod 6 is arranged in the sliding hole, the other side of the fixed connector 7 is connected with a back-off connector 3 through a thread, the back-off connector 3 is provided with a groove, a rubber ring 4 is arranged in the groove, one side of the rubber ring 4 of the back-off connector 3 is movably connected with an extrusion flat gasket 5, and the back-off connector 3 is connected with a piston 2.
The invention is composed of a syringe cylinder body 1, a piston 2, an inverted buckle connector 3, a rubber ring 4, an extrusion flat gasket 5, a thrust rod 6, a fixed connector 7 and a piston rod 8, wherein the inverted buckle connector 3 is connected with the fixed connector 7 through threads, a piston head of the fixed sealed compensation syringe is formed by the inverted buckle connector 3, the fixed connector 7 and the extrusion flat gasket 5, the extrusion flat gasket 5 can automatically move at the moment, the rubber ring 4 is placed in a groove of the inverted buckle connector 3, the extrusion flat gasket 5 can also move at the moment, an axial deformation space is provided for the extrusion of the rubber ring 4, the rubber ring 4 is completely in a free state at the moment, the piston 2 is extruded on the inverted buckle connector 3 to ensure that the compression direction is positive, the rubber ring 4 is subjected to the radial pressure of the piston 2 at the moment, the piston 2 deforms, the piston 2 pushes the extrusion flat gasket 5 to move along with the radial deformation, the axial deformation of the rubber ring 4 enables the outer diameter of the piston to be enlarged, but at this moment, because the rubber ring 4 has a radial deformation space, the rubber ring 4 deforms axially to enable the variation of the outer diameter size of the piston 2 to be very small, then the piston 2 is placed into the injector cylinder 1, at this moment, the outer diameter size of the piston 2 is in clearance fit with the inner diameter of the injector cylinder 1, the situation that the cylindrical surface of the piston 2 is scratched by the injector cylinder 1 does not exist, the piston rod 8 is twisted to enable the piston rod 8 to push the thrust rod 6 along the fixed connector 7, the thrust rod 6 jacks up to extrude the flat pad 5, the extrusion flat pad 5 extrudes the rubber ring 4 to provide axial pressure for the rubber ring 4, at this moment, the axial space is incompressible, the rubber ring 4 can only be compressed in the radial direction, the rubber ring 4 extrudes the piston 2, the outer diameter size of the piston 2 is increased, and interference fit with the injector cylinder 1 is generated.
Preferably, the rubber ring 4 is an O-shaped rubber ring. The structure design makes the rubber ring 4 have elasticity and compression. In fact, other configurations of the rubber ring 4 can be used, as the case may be.
Preferably, the reverse buckle connector 3 is provided with a reverse buckle, and the reverse buckle is embedded in the piston 2. The structural design makes the connection more stable. In fact, other configurations of the reverse-locking connection head 3 may be used, as the case may be.
Preferably, one side of the injector cylinder body 1 is connected with an injection head 9, the injection head 9 is provided with a sealing groove, a sealing ring 10 is installed in the sealing groove, the injection head 9 is connected with a pressing sleeve 11, and the pressing sleeve 11 is installed on the injector cylinder body 1 in a locking mode through threads. Such a design facilitates the replacement of different injection heads 9. In fact, other configurations of the injection head 9 may be used, as the case may be.
Preferably, the other side of the syringe cylinder body 1 is connected with a hanging plate 12, a sealing sleeve 13 is arranged in the hanging plate 12, and the piston rod 8 is arranged in the sealing sleeve 13. The structure design is convenient to take and has a sealing effect. In fact, other configurations of the strap 12 may be used, as the case may be.
Preferably, a pressure plate 14 is screwed to one side of the piston rod 8. Such a structural design facilitates the pushing of the piston rod 8. In fact, other configurations of the platen 14 are contemplated as appropriate.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. Adjustable sealed compensation syringe, its characterized in that: including syringe cylinder body (1), sliding connection has piston rod (8) in syringe cylinder body (1), piston rod (8) have fixed connector (7) through threaded connection, fixed connector (7) border is equipped with the slide opening, install thrust rod (6) in the slide opening, the opposite side of fixed connector (7) has back-off connector (3) through threaded connection, back-off connector (3) are equipped with the recess, install rubber ring (4) in the recess, one side swing joint of back-off connector (3) at rubber ring (4) has extrusion flat pad (5), back-off connector (3) even have piston (2).
2. The adjustable seal compensation injector of claim 1, wherein: the rubber ring (4) is an O-shaped rubber ring.
3. The adjustable seal compensation injector of claim 2, wherein: the back-off connector (3) is provided with a back-off which is embedded into the piston (2).
4. The adjustable seal compensation injector of claim 3, wherein: one side of syringe cylinder body (1) is connected with injection head (9), injection head (9) are equipped with the seal groove, install sealing washer (10) in the seal groove, injection head (9) are connected with and press cover (11), press cover (11) to install on syringe cylinder body (1) through screw thread locking.
5. The adjustable seal compensation injector of claim 4, wherein: the other side of syringe cylinder body (1) is connected with takes link plate (12), it installs seal cover (13) in link plate (12) to take, piston rod (8) are installed in seal cover (13).
6. The adjustable seal compensation injector of claim 5, wherein: one side of the piston rod (8) is connected with a pressure plate (14) through threads in a locking manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490714.5A CN113289148B (en) | 2021-05-06 | 2021-05-06 | Adjustable sealing compensation syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490714.5A CN113289148B (en) | 2021-05-06 | 2021-05-06 | Adjustable sealing compensation syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113289148A true CN113289148A (en) | 2021-08-24 |
| CN113289148B CN113289148B (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110490714.5A Active CN113289148B (en) | 2021-05-06 | 2021-05-06 | Adjustable sealing compensation syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113289148B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632119A (en) * | 1969-12-29 | 1972-01-04 | Chemplast Inc | Resilient sealing means for joint between elements having different coefficients of expansion |
| US3884230A (en) * | 1973-09-27 | 1975-05-20 | Goldwyn L Wulff | Flexible needle and guard device for a hypodermic syringe |
| US5395326A (en) * | 1993-10-20 | 1995-03-07 | Habley Medical Technology Corporation | Pharmaceutical storage and mixing syringe having high pressure assisted discharge |
| CN2585237Y (en) * | 2002-08-29 | 2003-11-05 | 江西特康科技有限公司 | Piston-type syringe sealing structure of haemocytes analyzer |
| CN1736501A (en) * | 2005-09-09 | 2006-02-22 | 余利荣 | Injection with low resistance |
| CN200953021Y (en) * | 2006-09-07 | 2007-09-26 | 任永霞 | Piston type injector sealing structure for haemocytes analyser |
| CN202108989U (en) * | 2011-06-09 | 2012-01-11 | 苏州市仁信精密量仪有限公司 | Piston sealing structure |
| WO2012049480A1 (en) * | 2010-10-13 | 2012-04-19 | Sphere Medical Limited | Component with seal, receiving body, system and method |
| WO2014001386A1 (en) * | 2012-06-27 | 2014-01-03 | Becton Dickinson France | Medical injection device |
| CN105498048A (en) * | 2016-01-21 | 2016-04-20 | 余利荣 | Improved low-resistance injector |
| EP3150852A1 (en) * | 2015-10-01 | 2017-04-05 | Volvo Car Corporation | Seal ring, cylinder arrangement and pumping/motor arrangement |
| CN108025143A (en) * | 2015-07-14 | 2018-05-11 | Sio2医药产品公司 | Convertible plunger and the method for being assembled in medical cylinder |
| CN108167263A (en) * | 2017-12-08 | 2018-06-15 | 中国航天空气动力技术研究院 | A kind of adjustable movable sealing structure of decrement |
| US20190316582A1 (en) * | 2016-06-30 | 2019-10-17 | Graco Minnesota Inc. | Piston pump and seal ring |
| CN111536033A (en) * | 2020-06-16 | 2020-08-14 | 湖北安逸智控环保科技有限公司 | Grease injection diameter-adjustable piston assembly |
| CN212250434U (en) * | 2020-05-15 | 2020-12-29 | 重庆水泵厂有限责任公司 | Automatic control radial compression plunger sealing structure |
-
2021
- 2021-05-06 CN CN202110490714.5A patent/CN113289148B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632119A (en) * | 1969-12-29 | 1972-01-04 | Chemplast Inc | Resilient sealing means for joint between elements having different coefficients of expansion |
| US3884230A (en) * | 1973-09-27 | 1975-05-20 | Goldwyn L Wulff | Flexible needle and guard device for a hypodermic syringe |
| US5395326A (en) * | 1993-10-20 | 1995-03-07 | Habley Medical Technology Corporation | Pharmaceutical storage and mixing syringe having high pressure assisted discharge |
| CN2585237Y (en) * | 2002-08-29 | 2003-11-05 | 江西特康科技有限公司 | Piston-type syringe sealing structure of haemocytes analyzer |
| CN1736501A (en) * | 2005-09-09 | 2006-02-22 | 余利荣 | Injection with low resistance |
| CN200953021Y (en) * | 2006-09-07 | 2007-09-26 | 任永霞 | Piston type injector sealing structure for haemocytes analyser |
| WO2012049480A1 (en) * | 2010-10-13 | 2012-04-19 | Sphere Medical Limited | Component with seal, receiving body, system and method |
| CN202108989U (en) * | 2011-06-09 | 2012-01-11 | 苏州市仁信精密量仪有限公司 | Piston sealing structure |
| WO2014001386A1 (en) * | 2012-06-27 | 2014-01-03 | Becton Dickinson France | Medical injection device |
| CN108025143A (en) * | 2015-07-14 | 2018-05-11 | Sio2医药产品公司 | Convertible plunger and the method for being assembled in medical cylinder |
| EP3150852A1 (en) * | 2015-10-01 | 2017-04-05 | Volvo Car Corporation | Seal ring, cylinder arrangement and pumping/motor arrangement |
| CN105498048A (en) * | 2016-01-21 | 2016-04-20 | 余利荣 | Improved low-resistance injector |
| US20190316582A1 (en) * | 2016-06-30 | 2019-10-17 | Graco Minnesota Inc. | Piston pump and seal ring |
| CN108167263A (en) * | 2017-12-08 | 2018-06-15 | 中国航天空气动力技术研究院 | A kind of adjustable movable sealing structure of decrement |
| CN212250434U (en) * | 2020-05-15 | 2020-12-29 | 重庆水泵厂有限责任公司 | Automatic control radial compression plunger sealing structure |
| CN111536033A (en) * | 2020-06-16 | 2020-08-14 | 湖北安逸智控环保科技有限公司 | Grease injection diameter-adjustable piston assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113289148B (en) | 2023-03-21 |
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