CN214754078U - Liquid injection system with closed-circuit liquid return function - Google Patents
Liquid injection system with closed-circuit liquid return function Download PDFInfo
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- CN214754078U CN214754078U CN202120055995.7U CN202120055995U CN214754078U CN 214754078 U CN214754078 U CN 214754078U CN 202120055995 U CN202120055995 U CN 202120055995U CN 214754078 U CN214754078 U CN 214754078U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to a take notes liquid system of closed circuit liquid function that returns solves the not high scheduling problem of efficiency difference, precision that prior art exists, the technical scheme of adoption: including the module frame, set up the notes liquid head subassembly on the module frame, with annotate liquid head subassembly complex notes liquid pipeline mechanism, annotate liquid head subassembly including annotate the liquid head, with annotate liquid head complex liquid return head, annotate the liquid head with annotate the cooperation of liquid end of liquid pipeline mechanism, the liquid return head with annotate the cooperation of liquid pipeline in the liquid pipeline mechanism, annotate the liquid head and be used for setting up removable notes liquid needle tubing, it is used for annotating the liquid orifice plate to annotating on the nucleic acid extraction appearance to annotate the liquid needle tubing. The method has the following effects: the liquid injection precision is high and the efficiency is high.
Description
Technical Field
The utility model relates to a annotate liquid system suitable for nucleic acid draws appearance especially relates to a take notes liquid system of closed circuit liquid function of returning that is arranged in adding reagent in the orifice plate.
Background
In the fields of genetic engineering and protein engineering technology research, nucleic acid molecules are the main research objects, and the isolation and linearization of nucleic acids are genetic techniques for nucleic acid research. Nucleic acid is a basic unit representing the genetic characteristics of a living body, and nucleic acid detection is advanced biological detection on a molecular level, and has the remarkable advantages of sensitivity, specificity, no window period and the like compared with the traditional morphological detection, cytology detection, immunology detection and the like. The nucleic acid detection comprises qualitative PCR, molecular hybridization, real-time fluorescence quantitative PCR and other technologies, and the first key of the nucleic acid detection technologies is to complete the extraction of nucleic acid of a biological sample, so that the effective and accurate extraction of a nucleic acid template becomes the premise of subsequent nucleic acid detection. At present, nucleic acid extraction is carried out by adopting a nucleic acid extractor in China, most of nucleic acid extraction is carried out by using a pre-packaged pore plate, and the nucleic acid extractor has poor flexibility and low efficiency.
Disclosure of Invention
An object of the utility model is to solve the above-mentioned problem that prior art exists and provide a take liquid system of notes of closed circuit liquid function, be used for with the cooperation of nucleic acid extraction appearance, can insert in the action of nucleic acid extraction in a flexible way and annotate the liquid action, improve the flexibility of nucleic acid extraction in-process reagent ratio greatly, and annotate liquid and annotate the liquid mode for automatic, can improve the accuracy and the uniformity of annotating the liquid, and the work efficiency is improved, still set up liquid return head and liquid return pipeline simultaneously, can empty the air in annotating liquid pipeline mechanism (especially liquid suction pipeline), can improve the accuracy and the precision of annotating the liquid volume, in the reagent of will unnecessary discharge is received back to the reagent container through liquid return pipeline in the in-process of evacuation air, avoid extravagant.
The above technical purpose of the present invention is mainly solved by the following technical solutions: take notes liquid system of closed liquid function of returning, its characterized in that includes the module frame, sets up the notes liquid head subassembly on the module frame, with annotate liquid head subassembly complex notes liquid pipeline mechanism, annotate liquid head subassembly including annotating the liquid head, with annotate liquid head complex liquid return head, annotate the liquid head with annotate the liquid end cooperation of liquid pipeline mechanism, the liquid return head with annotate the liquid pipeline cooperation in the liquid pipeline mechanism, it is used for setting up removable notes liquid needle tubing to annotate the liquid head, it is used for annotating liquid to the orifice plate on the nucleic acid extraction appearance to annotate the liquid needle tubing. During the use, the module frame assembles the suitable position to the nucleic acid extraction appearance, annotates the liquid head and sets up the corresponding setting of orifice plate on the nucleic acid extraction appearance for real-time to orifice plate injection reagent. Because there is the air in the pipeline among the notes liquid pipeline mechanism, before annotating the liquid, the air in the pipeline need the evacuation, makes the pipeline full of reagent, and the evacuation air avoids the space to occupy certain volume, and the volume is uncertain and influence the accuracy of reagent volume, is favorable to improving and annotates the liquid precision. In the evacuation process, can several multirow play some reagents inevitable, if not retrieve the reagent of multirow, must lead to the fact the waste, consequently, set up back the liquid head, return the liquid head and annotate the liquid return pipeline cooperation in the liquid pipeline mechanism, annotate liquid pipeline mechanism and form a closed circuit: the liquid suction port of the liquid suction pipeline of the liquid injection pipeline mechanism is matched with the inner cavity of the reagent container, the reagent reaches the liquid injection head through the liquid suction pipeline, then is injected out through the liquid injection needle tube on the liquid injection head and is injected into the liquid return head, the injected air in the pipeline is just injected, redundant reagent is injected into the liquid return head in the air discharge process, the liquid return pipeline in the liquid injection pipeline mechanism flows to the liquid return head through the liquid return head, and the liquid outlet of the liquid return pipeline is matched with the inner cavity of the reagent container.
Still include intelligent control module, intelligent control module with annotate liquid head subassembly and annotate liquid pipeline mechanism signal connection. The intelligent control module can be an independent module or an intelligent control module integrated on the nucleic acid extraction instrument, and automatic liquid injection in the nucleic acid extraction process is realized by the arrangement of the intelligent control module.
Annotate first subassembly still including annotating the liquid baffle, it sets up to annotate the liquid baffle annotate the liquid head below, the setting of liquid return head is in annotate the liquid head with annotate between the liquid baffle, annotate the overhead a plurality of notes liquid needle tube jacks that run through that set up of liquid, annotate the liquid needle tube jack and be used for planting and annotate the liquid needle tube, the overhead liquid return channel that sets up of liquid return, the liquid return hole on the liquid return channel with annotate liquid needle tube jack one-to-one setting, the liquid outlet of liquid return channel with it forms the intercommunication to return liquid pipeline, it is used for accepting to annotate the liquid baffle that liquid needle tube accident dropped. Annotate liquid overhead a plurality of notes liquid needle tubes that can place, annotate liquid pipeline mechanism and also can be the multiunit, a set of notes liquid pipeline mechanism corresponds one and annotates liquid needle tube, realizes the selection of different passageway liquid, realizes multiple reagent, the notes operation of liquid of a plurality of volumes. Annotate the liquid baffle and be used for sheltering from the reagent of accidental drippage, avoid polluting orifice plate or nucleic acid extraction appearance.
The liquid injection pipeline mechanism comprises an electric pump, a liquid suction pipeline matched with a liquid inlet of the electric pump, and a liquid outlet pipeline matched with a liquid outlet of the electric pump, the liquid injection head is matched with a liquid outlet end of the liquid outlet pipeline, a liquid outlet end of the liquid return pipeline is used for being matched with a reagent container, and the electric pump is in signal connection with the intelligent control module.
Annotate the liquid head with the cooperation mode of liquid head includes at least:
the end surface of the liquid injection head and the end surface of the liquid return head are both planes, and the two planes can form sealing fit;
or, annotate the liquid head and annotate the sealed cooperation of liquid needle tube's outer wall, annotate the liquid needle tube with annotate the setting of liquid needle tube jack one-to-one, annotate the liquid needle tube and insert return the liquid hole, annotate the outer wall of liquid needle tube with the inner wall of returning the liquid hole forms sealed cooperation.
The module frame is provided with a guide rail, the guide rail is transverse, the liquid injection head and the liquid injection baffle are respectively provided with a guide block component, and the guide block components are matched with the guide rail and used for enabling the liquid injection head and the liquid injection baffle to move transversely. In addition, the lateral direction referred to herein means that the direction parallel to the reagent cartridge receiving plane on the nucleic acid extracting apparatus is the lateral direction, and the direction perpendicular to the reagent cartridge receiving plane is the longitudinal direction.
Annotate the liquid head and annotate the liquid baffle and connect the motor respectively, the motor is connected with intelligent control module signal, the motor is used for driving respectively annotate the liquid head with annotate the liquid baffle and remove.
The liquid suction pipeline is matched with a low liquid level alarm device, the liquid return pipeline is provided with a switch valve, and the low liquid level alarm device and the switch valve are in signal connection with the intelligent control module.
The utility model discloses beneficial effect who has: 1. the utility model is used for with the cooperation of nucleic acid extraction appearance, can insert in the nucleic acid extraction action in a flexible way and annotate the liquid action, improve the flexibility of nucleic acid extraction in-process reagent ratio greatly, and annotate liquid and be automatic liquid mode of annotating, can improve accuracy and the uniformity of annotating the liquid, improve work efficiency, still set up liquid return head and liquid return pipeline simultaneously, can empty the air in annotating liquid pipeline mechanism (especially liquid suction pipeline), can improve the accuracy and the precision of annotating the liquid volume, in the in-process of evacuation air is passed through liquid return pipeline with unnecessary discharged reagent and is retrieved the reagent container, avoid extravagant. 2. The liquid injection module can perform liquid injection operation on the pore plate before or in the process of extracting nucleic acid, and does not need additional manual operation. Wherein, the nucleic acid extractor realizes the nucleic acid extraction functions, including cracking, washing, eluting and the like. And/3, the intelligent control module can be an independent module or an intelligent control module integrated on the nucleic acid extraction instrument, and automatic liquid injection in the nucleic acid extraction process is realized by the arrangement of the intelligent control module. 4. The liquid injection module can also realize the liquid injection operation of various reagents and volumes. 5. Annotate liquid overhead a plurality of notes liquid needle tubes that can place, annotate liquid pipeline mechanism also can be the multiunit, annotate liquid needle tube and annotate liquid pipeline mechanism and can form multiunit combination branch case, and a set of notes liquid pipeline mechanism corresponds one and annotates liquid needle tube, realizes the selection of different passageway liquid, realizes multiple reagent, the notes operation of a plurality of volumes. 5. The arrangement of the guide rail and the guide block component enables the liquid injection head and the liquid injection baffle to be capable of changing positions, and liquid injection operation of different plate positions is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the liquid injection system of the present invention.
Fig. 2 is a schematic view of a first structure of the present invention, in which the liquid injection head and the liquid return head are engaged.
Fig. 3 is a schematic diagram of a second structure of the present invention, in which the liquid injection head and the liquid return head are matched.
Fig. 4 is a third schematic structural diagram of the liquid injection head and the liquid return head of the present invention.
Fig. 5 is a schematic structural view of the liquid injection head and the liquid return head of the present invention in a separated state.
Fig. 6 is a schematic structural view of the liquid injection head and the liquid return head in a closed state.
FIG. 7 is a schematic structural view of the nucleic acid extractor of the present invention.
Fig. 8 is an enlarged schematic view of fig. 7.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): as shown in FIGS. 1 to 8, the liquid injection system with a closed liquid return function is used for adding reagents to a pore plate on a nucleic acid extraction instrument, wherein the reagents comprise a lysis solution, three washing solutions and an eluent. Take notes liquid system of closed liquid function of returning to includes the module frame, set up the notes liquid head subassembly on the module frame, with annotate liquid head subassembly complex notes liquid pipeline mechanism, annotate the liquid head subassembly including annotating liquid head 1, with annotate liquid head complex and return liquid head 2, annotate the liquid head with annotate the liquid end cooperation of liquid pipeline mechanism, the liquid head with annotate the cooperation of liquid pipeline 3 in the liquid pipeline mechanism, annotate the liquid head and be used for setting up removable notes liquid needle tubing, the notes liquid needle tubing is used for annotating liquid to the orifice plate on the nucleic acid extraction appearance. During the use, the module frame assembles the suitable position to the nucleic acid extraction appearance, annotates the liquid head and sets up the corresponding setting of orifice plate on the nucleic acid extraction appearance for real-time to orifice plate injection reagent. Because there is the air in the pipeline among the notes liquid pipeline mechanism, before annotating the liquid, the air in the pipeline need the evacuation, makes the pipeline full of reagent, and the evacuation air avoids the space to occupy certain volume, and the volume is uncertain and influence the accuracy of reagent volume, is favorable to improving and annotates the liquid precision. In the evacuation process, can several multirow play some reagents inevitable, if not retrieve the reagent of multirow, must lead to the fact the waste, consequently, set up back the liquid head, return the liquid head and annotate the liquid return pipeline cooperation in the liquid pipeline mechanism, annotate liquid pipeline mechanism and form a closed circuit: the liquid suction port of the liquid suction pipeline of the liquid injection pipeline mechanism is matched with the inner cavity of the reagent container, the reagent reaches the liquid injection head through the liquid suction pipeline, then is injected out through the liquid injection needle tube on the liquid injection head and is injected into the liquid return head, the injected air in the pipeline is just injected, redundant reagent is injected into the liquid return head in the air discharge process, the liquid return pipeline in the liquid injection pipeline mechanism flows to the liquid return head through the liquid return head, and the liquid outlet of the liquid return pipeline is matched with the inner cavity of the reagent container.
Still include intelligent control module, intelligent control module with annotate liquid head subassembly and annotate liquid pipeline mechanism signal connection. The intelligent control module can be an independent module or an intelligent control module integrated on the nucleic acid extraction instrument, and automatic liquid injection in the nucleic acid extraction process is realized by the arrangement of the intelligent control module.
Annotate first subassembly still including annotating the liquid baffle, it sets up to annotate the liquid baffle annotate the liquid head below, the setting of liquid return head is in annotate the liquid head with annotate between the liquid baffle, annotate the overhead a plurality of notes liquid needle tube jacks 11 that run through that set up of liquid, annotate the liquid needle tube jack and be used for planting and annotate the liquid needle tube, the overhead liquid return channel that sets up of liquid return, return liquid hole 21 on the liquid channel with annotate liquid needle tube jack one-to-one setting, the liquid outlet of liquid return channel 22 with it forms the intercommunication to return liquid pipeline, it is used for accepting to annotate the liquid baffle of annotating the unexpected drippage of liquid needle tube. Annotate liquid overhead a plurality of notes liquid needle tubes that can place, annotate liquid pipeline mechanism and also can be the multiunit, a set of notes liquid pipeline mechanism corresponds one and annotates liquid needle tube, realizes the selection of different passageway liquid, realizes multiple reagent, the notes operation of liquid of a plurality of volumes. Annotate the liquid baffle and be used for sheltering from the reagent of accidental drippage, avoid polluting orifice plate or nucleic acid extraction appearance.
The liquid injection pipeline mechanism comprises an electric pump 4, a liquid suction pipeline 5 matched with a liquid inlet of the electric pump, and a liquid outlet pipeline 6 matched with a liquid outlet of the electric pump, the liquid injection head is matched with a liquid outlet end of the liquid outlet pipeline, a liquid outlet end of the liquid return pipeline is used for being matched with a reagent container 7, and the electric pump is in signal connection with the intelligent control module.
Annotate the liquid head with the cooperation mode of liquid head includes at least:
as shown in fig. 3, the end surface of the liquid injection head 1 and the end surface of the liquid return head 2 are both planes, and the planes can form sealing fit;
or, as shown in fig. 2 or 4, the liquid injection head is in sealed fit with the outer wall of the liquid injection needle tube, the liquid injection needle tube and the liquid injection needle tube insertion holes are arranged in a one-to-one correspondence manner, the liquid injection needle tube is inserted into the liquid return hole, and the outer wall of the liquid injection needle tube is in sealed fit with the inner wall of the liquid return hole.
Further, the liquid injection needle tube is cylindrical (as shown in fig. 2) or frustum-shaped (as shown in fig. 4), and the liquid return hole on the liquid return channel is correspondingly cylindrical or frustum-shaped.
The module frame is provided with a guide rail, the guide rail is transverse, the liquid injection head and the liquid injection baffle are respectively provided with a guide block component, and the guide block components are matched with the guide rail and used for enabling the liquid injection head and the liquid injection baffle to move transversely. In addition, the lateral direction referred to herein means that the direction parallel to the reagent cartridge receiving plane on the nucleic acid extracting apparatus is the lateral direction, and the direction perpendicular to the reagent cartridge receiving plane is the longitudinal direction.
Annotate the liquid head and annotate the liquid baffle and connect the motor respectively, the motor is connected with intelligent control module signal, the motor is used for driving respectively annotate the liquid head with annotate the liquid baffle and remove.
The liquid suction pipeline is matched with a low liquid level alarm device, the liquid return pipeline is provided with a switch valve 7, and the low liquid level alarm device and the switch valve are in signal connection with the intelligent control module.
As shown in fig. 8, the injection head is provided with five injection channels 13 of independent channels, which are respectively used for injecting five reagents.
The application process of the technical scheme is as follows:
the electric pump sucks liquid through a liquid sucking pipeline inserted into the reagent container; and the reagent is conveyed to the liquid injection head through the liquid outlet pipeline. In order to discharge air in a liquid injection pipeline system consisting of a liquid suction pipeline, an electric pump and a liquid outlet pipeline, the pipelines are filled with reagents so as to obtain better liquid injection precision; before emptying, after the liquid injection head and the liquid return head are closed, the liquid return head, the switch valve and the liquid return pipeline form a liquid return pipeline system, and the liquid return pipeline system is communicated with the liquid injection pipeline; then the electric pump and the switch valve are opened to start emptying, and the reagent returns to the reagent container through the liquid return pipeline system; after emptying, the electric pump, the switch valve and the liquid injection head are separated from the liquid return head.
Fig. 2-4 are schematic diagrams of three common structures formed by closing the liquid injection head and the liquid return head. Of course, not limited to these three configurations.
As shown in fig. 5 and 6, the closing mode with the cylindrical surface of the injection needle tube 8 as the sealing surface is further explained; the liquid injection head comprises a plurality of liquid injection needle tubes, and the corresponding liquid return head comprises liquid return gaskets 9 with the same quantity as the liquid injection heads. The liquid return gasket 9 is arranged in the liquid return hole 21 and is in sealing fit with the inner wall of the liquid return hole 21, and meanwhile, the liquid return gasket 9 is in sealing fit with the outer wall of the liquid injection needle tube 8, so that liquid leakage is avoided.
The specific process is as follows:
before liquid injection, the process of air evacuation is as follows: the liquid injection head moves horizontally to aim at the liquid return head, the liquid injection head descends or the liquid return head ascends to close the liquid injection head and the liquid return head, and the liquid injection needle tube 8 is inserted into the liquid return gasket. At the moment, the switch valve is opened, the electric pump works to discharge the air of the liquid injection pipeline system, so that the liquid injection pipeline system is filled with the reagent; after emptying, the electric pump and the switch valve are closed, the liquid injection head rises or the liquid return head descends, and the liquid injection head is separated from the liquid return head; and horizontally moving the liquid injection head to the liquid injection position for injecting liquid. Under the general condition, annotate the liquid baffle setting and in annotating liquid position department, move in place when annotating the liquid head, annotate the liquid baffle and then move away from annotate the liquid position, annotate the liquid head and annotate liquid.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. In the above embodiments, the present invention may be variously modified and changed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Take notes liquid system of closed liquid function of returning, its characterized in that includes the module frame, sets up the notes liquid head subassembly on the module frame, with annotate liquid head subassembly complex notes liquid pipeline mechanism, annotate liquid head subassembly including annotating the liquid head, with annotate liquid head complex liquid return head, annotate the liquid head with annotate the liquid end cooperation of liquid pipeline mechanism, the liquid return head with annotate the liquid pipeline cooperation in the liquid pipeline mechanism, it is used for setting up removable notes liquid needle tubing to annotate the liquid head, it is used for annotating liquid to the orifice plate on the nucleic acid extraction appearance to annotate the liquid needle tubing.
2. The liquid injection system with the closed-circuit liquid return function according to claim 1, further comprising an intelligent control module in signal connection with the liquid injection head assembly and the liquid injection pipeline mechanism.
3. The liquid injection system with the closed-circuit liquid return function according to claim 2, wherein the liquid injection head assembly further comprises a liquid injection baffle, the liquid injection baffle is arranged below the liquid injection head, the liquid return head is arranged between the liquid injection head and the liquid injection baffle, the liquid injection head is provided with a plurality of penetrating liquid injection needle tube jacks, the liquid injection needle tube jacks are used for inserting liquid injection needle tubes, the liquid return head is provided with liquid return channels, liquid return holes in the liquid return channels are arranged in one-to-one correspondence with the liquid injection needle tube jacks, liquid outlets of the liquid return channels are communicated with the liquid return pipelines, and the liquid injection baffle is used for receiving liquid accidentally dropped by the liquid injection needle tubes.
4. The fluid injection system with closed circuit fluid return function according to claim 3, wherein said fluid injection pipeline mechanism comprises an electric pump, a fluid suction pipeline matching with an inlet of said electric pump, and a fluid outlet pipeline matching with a fluid outlet of said electric pump, said fluid injection head matches with a fluid outlet end of said fluid outlet pipeline, a fluid outlet end of said fluid return pipeline is used for matching with a reagent container, and said electric pump is in signal connection with an intelligent control module.
5. The fluid injection system with closed circuit fluid return function according to claim 4, wherein the matching manner of the fluid injection head and the fluid return head at least comprises:
the end surface of the liquid injection head and the end surface of the liquid return head are both planes, and the two planes can form sealing fit;
annotate the liquid head with annotate the sealed cooperation of liquid needle tubing's outer wall, annotate the liquid needle tubing with annotate liquid needle tubing jack one-to-one setting, it inserts to annotate the liquid needle tubing return the liquid hole, annotate the outer wall of liquid needle tubing with the inner wall in liquid hole forms sealed cooperation.
6. The liquid injection system with the closed-circuit liquid return function according to claim 1 or 2, wherein a guide rail is arranged on the module frame, the guide rail is transversely arranged, and guide block assemblies are respectively arranged on the liquid injection head and the liquid injection baffle and are matched with the guide rail, so that the liquid injection head and the liquid injection baffle can transversely move.
7. The liquid injection system with the closed-circuit liquid return function according to claim 3, wherein a guide rail is arranged on the module frame, the guide rail is arranged transversely, and guide block assemblies are respectively arranged on the liquid injection head and the liquid injection baffle and are matched with the guide rail, so that the liquid injection head and the liquid injection baffle can move transversely.
8. The liquid injection system with the closed-circuit liquid return function according to claim 5, wherein a guide rail is arranged on the module frame, the guide rail is arranged transversely, and guide block assemblies are respectively arranged on the liquid injection head and the liquid injection baffle and are matched with the guide rail, so that the liquid injection head and the liquid injection baffle can move transversely.
9. The liquid injection system with the closed-circuit liquid return function according to claim 8, wherein the liquid injection head and the liquid injection baffle are respectively connected with a motor, the motor is in signal connection with an intelligent control module, and the motors are used for respectively driving the liquid injection head and the liquid injection baffle to move.
10. The liquid injection system with a closed-loop liquid return function according to claim 9, wherein the liquid suction pipe is provided with a low liquid level alarm device, the liquid return pipe is provided with a switch valve, and the low liquid level alarm device and the switch valve are in signal connection with the intelligent control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120055995.7U CN214754078U (en) | 2021-01-08 | 2021-01-08 | Liquid injection system with closed-circuit liquid return function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120055995.7U CN214754078U (en) | 2021-01-08 | 2021-01-08 | Liquid injection system with closed-circuit liquid return function |
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| Publication Number | Publication Date |
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| CN214754078U true CN214754078U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120055995.7U Active CN214754078U (en) | 2021-01-08 | 2021-01-08 | Liquid injection system with closed-circuit liquid return function |
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| CN (1) | CN214754078U (en) |
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2021
- 2021-01-08 CN CN202120055995.7U patent/CN214754078U/en active Active
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