CN211954846U - Quantitative injector for circulating system - Google Patents
Quantitative injector for circulating system Download PDFInfo
- Publication number
- CN211954846U CN211954846U CN202020760901.1U CN202020760901U CN211954846U CN 211954846 U CN211954846 U CN 211954846U CN 202020760901 U CN202020760901 U CN 202020760901U CN 211954846 U CN211954846 U CN 211954846U
- Authority
- CN
- China
- Prior art keywords
- push
- pull rod
- piston
- needle cylinder
- cylinder body
- 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
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a quantitative injector for a circulating system, which comprises a needle cylinder body and a push-pull rod, wherein a check valve is arranged at the injection port of the needle cylinder body, two channels which are connected with the inside of the needle cylinder body and the circulating system are arranged at the two ends of the wall of the needle cylinder body, a lower piston is arranged at the head sleeve of the push-pull rod, a sealing device is arranged between the lower piston and the inlet of the needle cylinder body, so that the device has good air tightness in the piston movement process, when sampling injection is needed, the lower piston is pulled out to the upper part of the channel by the push-pull rod, after the lower piston crosses the lower boundary position of the channel, the material to be injected automatically enters the region to be injected between the channel and the bottom of the needle cylinder body under the action of negative pressure, then the push-pull rod is pushed to the bottom of the needle cylinder body to send the material to be injected out, has good application value.
Description
Technical Field
The utility model relates to a quantitative injector technical field especially relates to a quantitative injector for circulation system.
Background
The quantitative injector is widely applied to the industries of chemical analysis, medicine, medical treatment and the like. The existing quantitative injector cannot sample in a circulating system in real time, and the quantitative collection of gas or liquid in the circulating system has great application value in the chemical analysis industry. In view of this, the present invention provides a quantitative injector device that may be used in a circulatory system.
SUMMERY OF THE UTILITY MODEL
In view of the above, in order to overcome the defects of the prior art, the present invention provides a quantitative injector for a circulation system.
The technical scheme for solving the problem is as follows: a quantitative injector for a circulating system comprises a needle cylinder pipe body and a push-pull rod, wherein a one-way valve is arranged at an injection port of the needle cylinder pipe body, two channels which are connected with the inside of the needle cylinder pipe body and the circulating system are arranged at two ends of the wall of the needle cylinder pipe body, a lower piston is sleeved at the head of the push-pull rod, and a sealing device is arranged between the lower piston and an inlet of the needle cylinder pipe body.
Preferably, the sealing device is an upper piston fixedly sleeved on the rod body of the push-pull rod, and the upper piston and the lower piston are both attached to the inner wall of the needle cylinder pipe body.
Preferably, the distance between the upper piston and the lower piston is larger than the distance between the lower edge of the channel and the bottom of the syringe tube body.
Preferably, the sealing device is an upper piston fixed on the inner wall of the inlet of the syringe tube body, and the push-pull rod penetrates through the center of the upper piston and can slide up and down along the axis of the syringe tube body.
Preferably, the upper and lower pistons have a thickness less than the diameter of the passageway.
Through the technical scheme, the beneficial effects of the utility model are that: the utility model discloses a piston under the cover is established on the push-and-pull rod, and adopt sealing device to form dual airtight, make the device have fine gas tightness in the piston motion process, when the injection of needs sample, utilize the push-and-pull rod to pull out the piston to the passageway top down, after the lower border position of passageway is crossed to the piston down, treat the injection material because the effect of negative pressure is automatic to get into the injection district of treating between passageway and the cylinder body bottom, then promote the push-and-pull rod will lower the piston and push away to cylinder body bottom and will treat that the injection material passes through the check valve and see off, thereby realize quantitative injection, device simple structure, easily realize, and has fine using value.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
In the figure: 1-syringe tube body, 2-channel, 3-lower piston, 4-upper piston, 5-push-pull rod and 6-one-way valve.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description taken in conjunction with the accompanying fig. 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The first embodiment is as follows: as shown in fig. 1, a quantitative injector for a circulation system comprises a syringe tube 1 and a push-pull rod 5, wherein a check valve 6 is arranged at an injection port of the syringe tube 1, two ends of the wall of the syringe tube 1 are provided with two channels 3 communicating the inside of the syringe tube 1 with the circulation system, and the check valve 6 only allows gas in the syringe tube to be discharged and does not allow external gas to enter from the injection port. The head of the push-pull rod 5 is sleeved with the lower piston 3, and a sealing device is arranged between the lower piston 3 and the inlet of the syringe tube body 1.
The sealing device of the embodiment is an upper piston 4 fixedly sleeved on the rod body of the push-pull rod 5, and the upper piston 4 and the lower piston 3 are both attached to the inner wall of the needle cylinder pipe body, so that the device has good air tightness in the piston movement process. The thickness of the upper piston 4 and the lower piston 3 is smaller than the diameter of the channel 2, and the distance between the upper piston and the lower piston is larger than the distance between the channel 2 and the bottom of the syringe tube body 1, so that the work of a circulation system is prevented from being blocked.
The specific working principle of this embodiment is as follows: when the device is in a standby state, the lower piston 3 is arranged at the bottom of the syringe tube body 1, and the circulating system is in a working state. When sampling and injection are needed, the lower piston 3 is pulled out to the upper part of the channel by the push-pull rod 5, and negative pressure is generated between the channel and the syringe tube body in the process. After the lower piston passes the lower boundary position of the channel, the material to be injected automatically enters the area to be injected between the channel and the bottom of the syringe tube body due to the action of the negative pressure. Then, the push-pull rod is pushed to push the lower piston to the bottom of the syringe tube body to send out the material to be injected through the one-way valve, and the injection volume of the injector in the process depends on the volume between the channel and the bottom of the syringe tube body.
In the second embodiment, another sealing device structure is provided, as shown in fig. 2, the sealing device is an upper piston 4 fixed on the inner wall of the inlet of the syringe tube 1, the push-pull rod 5 penetrates through the center of the upper piston 4 and can slide up and down along the axis of the syringe tube 1, and the push-pull rod 5 is in close contact with the upper piston 4, so that the device has good air tightness during the movement of the piston. The working principle of this embodiment is the same as that of the first embodiment, and will not be described in detail here.
To sum up, the utility model discloses can realize the ration injection, device simple structure easily realizes, has fine using value.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. The utility model provides a quantitative injector for circulation system, includes cylinder body and push-and-pull rod, its characterized in that: the syringe comprises a syringe body and is characterized in that a check valve is arranged at an injection port of the syringe body, two channels communicating the interior of the syringe body with a circulating system are arranged at two ends of the wall of the syringe body, a lower piston is sleeved at the head of a push-pull rod, and a sealing device is arranged between the lower piston and an inlet of the syringe body.
2. The dosing injector for a circulation system according to claim 1, wherein: the sealing device is an upper piston fixedly sleeved on the push-pull rod body, and the upper piston and the lower piston are both attached to the inner wall of the needle cylinder body.
3. The dosing injector for a circulation system according to claim 2, characterized in that: the distance between the upper piston and the lower piston is larger than the distance between the lower edge of the channel and the bottom of the syringe tube body.
4. The dosing injector for a circulation system according to claim 1, wherein: the sealing device is an upper piston fixed on the inner wall of the inlet of the syringe tube body, and the push-pull rod penetrates through the center of the upper piston and can slide up and down along the axis of the syringe tube body.
5. The quantitative injector for circulation system according to claim 3 or 4, characterized in that: the upper and lower pistons have a thickness less than the diameter of the passageway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020760901.1U CN211954846U (en) | 2020-05-11 | 2020-05-11 | Quantitative injector for circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020760901.1U CN211954846U (en) | 2020-05-11 | 2020-05-11 | Quantitative injector for circulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211954846U true CN211954846U (en) | 2020-11-17 |
Family
ID=73170472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020760901.1U Active CN211954846U (en) | 2020-05-11 | 2020-05-11 | Quantitative injector for circulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211954846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844086A (en) * | 2020-12-29 | 2021-05-28 | 苏州鼎实医疗科技有限公司 | Portable injection device of sampling application of sample |
-
2020
- 2020-05-11 CN CN202020760901.1U patent/CN211954846U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844086A (en) * | 2020-12-29 | 2021-05-28 | 苏州鼎实医疗科技有限公司 | Portable injection device of sampling application of sample |
| CN112844086B (en) * | 2020-12-29 | 2022-05-20 | 苏州鼎实医疗科技有限公司 | Portable injection device of sampling application of sample |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4703763A (en) | Blood sample syringe | |
| CN109406801A (en) | Sample analyser and its sample collection and distribution method | |
| CN211954846U (en) | Quantitative injector for circulating system | |
| CN207263475U (en) | A kind of device for discharging vacuum blood collection tube residual pressure | |
| CN210584993U (en) | Liquid sample retrieval system | |
| CN105651554A (en) | Collection device and collection method of concrete pore solution | |
| CN205120724U (en) | Automatic device of maring of powerful cleaning solution of blood cell analysis appearance | |
| CN207898484U (en) | A kind of blood sampling device for disease prevention and cure | |
| CN206381190U (en) | Prevention from suffering from the diseases chemical examination sampler | |
| CN207575482U (en) | A kind of injector for medical purpose for facilitating drawing liquid | |
| CN206607234U (en) | A kind of cell culture liquid-transfering device | |
| CN210394336U (en) | Bacteria extraction device | |
| CN204931696U (en) | A kind of blood taking needle for medical test | |
| CN105675897A (en) | Cell analyzer | |
| CN107029309A (en) | A kind of injector for medical purpose and application method for facilitating drawing liquid | |
| CN203047820U (en) | Piston continuous liquid suction and drainage device | |
| CN208659485U (en) | The therapeutic device of galactapostema | |
| CN209172928U (en) | A kind of blood taking bag | |
| CN213312173U (en) | A aseptic liquid collecting device for in art | |
| CN205391131U (en) | Liquid sample collection ware under negative pressure condition | |
| CN110455592A (en) | Based on self-priming gas production bag and its application | |
| CN206729898U (en) | A kind of disposable blood taking device | |
| CN220900450U (en) | Anti-leakage reagent bottle | |
| CN216394057U (en) | Double-cylinder injector integrating blood drawing and tube sealing | |
| CN209004019U (en) | A kind of emergency treatment severe hemostix |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |