CN111969174A - Liquid injection needle - Google Patents
Liquid injection needle Download PDFInfo
- Publication number
- CN111969174A CN111969174A CN202010870244.0A CN202010870244A CN111969174A CN 111969174 A CN111969174 A CN 111969174A CN 202010870244 A CN202010870244 A CN 202010870244A CN 111969174 A CN111969174 A CN 111969174A
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- Prior art keywords
- section
- needle
- liquid
- needle body
- diaphragm
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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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 133
- 238000002347 injection Methods 0.000 title claims abstract description 75
- 239000007924 injection Substances 0.000 title claims abstract description 75
- 125000006850 spacer group Chemical group 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 33
- 239000012528 membrane Substances 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 10
- 238000002955 isolation Methods 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a liquid injection needle, which comprises a needle body, wherein the needle body adopts a hollow structure, and the needle head of the needle body adopts a conical shape; be connected with the notes liquid structure of control feed liquor on the needle body, annotate the liquid structure and include the pole section of being connected with the needle body, be close to in the pole section in the one end of needle body be connected with the notes liquid pipe that the inner chamber of needle body is linked together, pole section in-connection have set up in annotate the spacer of liquid pipe top, annotate the intraductal diaphragm that is used for opening and close the notes liquid pipe of installing of liquid, be equipped with in the pole section and pass spacer and with the diaphragm core bar that the diaphragm is connected, be connected with the gas accuse subassembly that makes the diaphragm core bar follow pole section length direction round trip movement in the pole section on the pole. The invention adopts the principle of a pneumatic control diaphragm valve, and realizes the high synchronization of opening and closing the liquid injection pipe and the opening and closing needle body by utilizing the operation modes of initial closing state, spring reset and pneumatic control opening.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an injection needle.
Background
The liquid injection is used for the production of power lithium ion battery monomers, the essential key process is adopted, the operation effect directly influences the quality of the battery, the stainless steel extension of a liquid injection pipe is commonly adopted in the existing liquid injection needle, and when the liquid injection is stopped, the electrolyte drops from the opening of the liquid injection needle, so that the defect and the waste of the electrolyte are caused in the next liquid injection; or air is sucked back into the liquid injection pipe, so that the qualified rate of the liquid injection can be reduced; more seriously, if the shutdown time is long, the electrolyte contacting the air is crystallized and attached to the injection needle tube and the injection tube, causing a mechanism failure, and when the formed crystal mass reaches a certain amount, the whole is injected into the battery, causing a quality problem.
Disclosure of Invention
The invention aims to provide an injection needle to overcome the technical problems.
The technical purpose of the invention is realized by the following technical scheme:
a liquid injection needle comprises a needle body, wherein the needle body adopts a hollow structure, and the needle head of the needle body adopts a conical shape; be connected with the notes liquid structure of control feed liquor on the needle body, annotate the liquid structure and include the pole section of being connected with the needle body, be close to in the pole section in the one end of needle body be connected with the notes liquid pipe that the inner chamber of needle body is linked together, pole section in-connection have set up in annotate the spacer of liquid pipe top, annotate the intraductal diaphragm that is used for opening and close the notes liquid pipe of installing of liquid, be equipped with in the pole section and pass spacer and with the diaphragm core bar that the diaphragm is connected, be connected with the gas accuse subassembly that makes the diaphragm core bar follow pole section length direction round trip movement in the pole section on the pole.
Further, install in the pole section and extend to in the syringe needle and by the seal assembly that gas accuse subassembly carried out control, seal assembly includes that the upper end is installed in the pole section and the lower extreme extends to go out liquid core bar in the syringe needle, install in the pinhole sealing member in the syringe needle, it can pass to go out liquid core bar the pinhole sealing member makes the lower extreme of going out liquid core bar locate between the needle mouth of pinhole sealing member and syringe needle, gas accuse subassembly can make it is synchronous with the diaphragm core bar along pole section length direction round trip movement.
Furthermore, the pinhole sealing element comprises a support ring arranged in the needle head, an O-shaped ring connected to the support ring and a sealing ring arranged on the O-shaped ring, and the support ring is provided with a through hole.
Further, the rod section sequentially comprises an injection section, a pneumatic control section, a spring section and an air inlet section along the length direction of the rod section from one end close to the needle body, the pneumatic control assembly comprises an air inlet pipe arranged on the air inlet section, two shunt channels arranged on the air inlet section and communicated with the air inlet pipe, a shunt gasket connected to the lower end of the air inlet section, two flow guide pipelines arranged in the spring section and respectively butted with the two shunt channels, and a flow guide gasket connected to the lower end of the spring section, the diaphragm core rod and the liquid outlet core rod are both of a T-shaped structure, a pair of guide grooves arranged along the length direction of the rod section are arranged in the pneumatic control section and the spring section, a flow guide groove for communicating the flow guide pipelines with the guide groove arranged in the pneumatic control section is arranged on the isolation gasket, and a return groove for communicating the guide groove in the spring section with the shunt channels is arranged in the spring section, and the gas in the gas inlet pipe enters the pneumatic control section along the two shunt pipelines and the corresponding flow guide pipelines and enables the diaphragm core rod and the liquid outlet core rod to move towards the spring section in the guide groove.
Furthermore, two guide grooves of the spring section are internally provided with return springs, and one ends of the two return springs close to the air hole section are respectively connected with the liquid outlet core bar and the diaphragm core bar.
Furthermore, the liquid injection section, the air control section, the spring section and the air inlet section are connected with each other through threads.
Furthermore, annotate the liquid section with adopt threaded connection between the needle body just annotate the liquid section and be equipped with the sealing member with the needle body junction.
Has the advantages that:
the pneumatic control diaphragm valve is adopted, the operation modes of closing state, spring reset and pneumatic control opening are utilized initially, and pneumatic control is introduced by adopting a path of air pipe, so that the opening and closing of the liquid injection pipe and the height synchronization of the tail end of the opening and closing needle body are realized, and the opening and closing of the liquid injection pipe can effectively prevent liquid from dripping; the opening and closing of the end of the needle body can prevent air from being sucked back, and safely and effectively isolate air and electrolyte, thereby effectively preventing the electrolyte in the needle from crystallizing.
Drawings
FIG. 1 is an exploded view of the structure of the present invention;
FIG. 2 is an assembled view of the present invention;
FIG. 3 is a bottom view of the intake section;
FIG. 4 is a bottom view of the spring segment;
FIG. 5 is a schematic view of a pinhole seal;
in the figure:
1. a needle body; 11. a needle head; 2. a liquid injection structure; 21. a pole section; 211. a liquid injection section; 212. a pneumatic control section; 213. a spring section; 214. an air intake section; 22. an isolation gasket; 23. a diaphragm core bar; 24. a pneumatic control assembly; 241. an air inlet pipe; 242. a flow dividing channel; 243. a shunting gasket; 244. a diversion pipeline; 245. a flow guide gasket; 246. a return spring; 3. a liquid injection pipe; 4. a seal assembly; 41. liquid outlet core bar; 42. a pinhole seal; 421. a support ring; 422. an O-shaped ring; 423. a through hole; 5. and a seal.
Detailed Description
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "front", "rear", and the like, indicate orientations or positional relationships only for the purpose of describing the present invention and simplifying the description, but do not indicate or imply that the designated device or structure must have a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the liquid injection needle of the present invention comprises a needle body, a liquid injection structure and a pneumatic control assembly, wherein the liquid injection structure is connected to the needle body, and the pneumatic control assembly is used for controlling the liquid injection structure to realize automatic liquid injection; the needle body is preferably of a hollow structure, the needle head 11 of the needle body is in a conical shape, and the liquid injection structure is connected to one end of the needle body.
As shown in fig. 1, the liquid injection structure comprises a rod section, a liquid injection pipe, a diaphragm core rod and a diaphragm, wherein the pneumatic control assembly is connected with the diaphragm, the liquid injection pipe is connected with one end of the rod section close to the needle body in a mode perpendicular to the rod section, the needle body is connected with the rod section, the inner cavity of the needle body is communicated with the inner cavity of the liquid injection pipe, a separation gasket is arranged in the rod section and above the liquid injection pipe, the diaphragm is arranged in the liquid injection pipe, the diaphragm core rod is arranged in the rod section and connected with the diaphragm through the separation gasket, the diaphragm blocks the liquid injection pipe in an initial state, the battery liquid cannot flow to the needle body, when the diaphragm core rod moves upwards along the length direction of the rod section, the diaphragm moves synchronously so that the liquid injection pipe is opened to enable the battery liquid to flow into the needle body, the liquid injection is carried out through the lower end of the needle body, wherein the diaphragm core rod is controlled through the pneumatic control assembly.
The pneumatic control assembly and the driving principle of the diaphragm core rod are explained as follows:
as shown in fig. 1, in order to facilitate the design of the pneumatic control assembly, the rod section is designed in a segmented manner, the rod section sequentially comprises a liquid injection section, a pneumatic control section, a spring section and an air inlet section from one end close to the needle body along the length direction of the rod section, and the liquid injection section, the pneumatic control section, the spring section and the air inlet section are spliced in a threaded connection manner; to this end, the pneumatic control assembly comprises an air inlet pipe arranged at the upper end of the air inlet section, two shunt channels arranged in the air inlet section and communicated with the air inlet pipe, a shunt gasket arranged at the lower end of the air inlet section, two flow guide pipelines arranged in the spring section and respectively butted with the two shunt channels, and a flow guide gasket connected at the lower end of the spring section, wherein the shunt gasket is provided with two round holes for communicating the shunt channels with the flow guide channels, a pair of guide grooves arranged along the length direction of the rod section are respectively arranged in the pneumatic control section and the spring section, the isolation gasket is provided with two flow guide grooves for respectively communicating the two flow guide pipelines with the two guide grooves arranged in the pneumatic control section, and two return grooves for respectively communicating the two guide grooves in the spring section with the two shunt channels are arranged in the spring section, and then, the diaphragm core rod is movably arranged in one guide groove, the diaphragm core rod is of a T-shaped structure, a small round hole through which the diaphragm core rod can conveniently penetrate is formed in the isolation gasket, the inner diameter of the guide groove is consistent with the maximum diameter of the diaphragm core rod, and the minimum diameter of the diaphragm core rod is consistent with the inner diameter of the small round hole. At the moment, a return spring is installed in a guide groove corresponding to the diaphragm core bar in the spring section, the return spring is compressed when the diaphragm core bar moves upwards, and the return spring is reset to reset the diaphragm core bar after the air inlet pipe is closed to feed air, so that the liquid injection pipe is closed.
The air is isolated after the liquid injection is closed for realizing the liquid injection, the phenomenon of electrolyte crystallization is reduced, the sealing design is carried out in the rod section and the needle body, the air isolation is synchronously realized while the liquid injection is closed, and the air isolation is realized through the sealing component.
The sealing assembly comprises a liquid outlet core rod, the upper end of the liquid outlet core rod is arranged in the rod section, the lower end of the liquid outlet core rod extends into the needle head, the liquid outlet core rod is of the same structure as the diaphragm core rod, the maximum diameter of the liquid outlet core rod is consistent with the inner diameter of the guide groove, the mounting mode of the liquid outlet core rod is the same as that of the diaphragm core rod, the isolation gasket is also provided with another small round hole, the minimum diameter of the liquid outlet core rod is the same as that of the other small round hole in the isolation gasket, and the upper end of the liquid outlet core rod is movably arranged in the other guide groove of the air hole section, so that when the air inlet pipe is filled with air, the air can enter the other guide groove along a diversion channel, a flow guide channel and a flow guide groove corresponding to the liquid outlet core rod, and the liquid outlet core rod; the needle head is internally provided with a pinhole sealing piece, the lower end of the liquid outlet core rod can penetrate through the pinhole sealing piece, the pinhole sealing piece is provided with a through hole which is convenient for the liquid outlet core rod to penetrate through, and the diameter of the through hole is consistent with that of the liquid outlet core rod, so that the through hole is blocked when the liquid outlet core rod is butted on the pinhole sealing piece, the needle head is sealed, and when the liquid outlet core rod moves upwards and moves to the position above the pinhole sealing piece, the battery liquid can pass through the through hole and flow out through a needle opening of the needle head. In the above, the liquid outlet core bar is smaller than the inner diameter of the needle body, and the liquid outlet core bar is preferably concentrically arranged with the inner cavity of the needle body.
Similarly, a return spring is also arranged in the guide groove corresponding to the liquid outlet core bar in the spring section, and the return spring can return the liquid outlet core bar when the air inlet pipe is closed and air is introduced, so that the pinhole sealing element is sealed again.
In the structure, because of the reason of installing two reset springs, in order to avoid the spring installation position, the diversion channel arranged in the spring section needs to be subjected to deflection design.
As shown in the figure, the pinhole sealing element comprises a support ring arranged in the needle head, an O-shaped ring connected to the support ring and a sealing ring arranged on the O-shaped ring, and the support ring is provided with a through hole.
In order to realize effective sealing, the liquid injection section is in threaded connection with the needle body, a sealing part is arranged at the joint of the liquid injection section and the needle body, and the sealing part is a conventional sealing ring.
Instructions for use: the structure is installed to assemble the injection needle.
Liquid injection: the air is introduced into the rod section through the air inlet pipe, the air flows along the diversion channel, the flow guide channel and the guide groove, so that the liquid outlet core rod and the diaphragm core rod are synchronously pushed respectively, the diaphragm core rod opens the diaphragm to the liquid injection pipe, the battery liquid is injected along the liquid injection pipe, the gap between the needle body and the liquid outlet core rod, the through hole on the needle hole sealing piece and the needle opening on the needle head, and the air returns to the diversion channel from the guide groove along the return groove;
closing liquid injection: the air inlet pipe is closed and ventilated, no air is pushed, the liquid outlet core rod and the diaphragm core rod synchronously move downwards, the diaphragm core rod pushes the diaphragm to close the liquid injection pipe, the liquid outlet core rod penetrates through the pinhole sealing piece to plug the through hole in the pinhole sealing piece, and therefore when the liquid injection is closed, the inner cavity of the needle body is synchronously isolated from the contact with the outside air through the liquid outlet core rod and the pinhole sealing piece.
In the above, the liquid injection pipe and the rest of the rod section are sealed by the isolation gasket, so that the liquid outlet core rod and the diaphragm core rod are pushed, gas is prevented from contacting with battery liquid in the liquid injection pipe, the series flow of electrolyte and air is avoided in the liquid injection and liquid injection closing processes, and the crystallization phenomenon is prevented.
According to the liquid injection needle, when liquid injection is stopped, the mode that the electrolyte enters the liquid injection needle end and the electrolyte exits the liquid injection needle end and the liquid injection flow channel is closed is adopted, so that only the electrolyte is in the liquid injection needle, the external air is thoroughly isolated, the purposes of preventing liquid dropping, suck back and crystallization are realized, and the liquid injection needle is safe, quick and effective; the invention has the advantages of simple structure, convenient installation, convenient use, reliable operation and easy maintenance and disassembly.
In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the above specific embodiments, which are only used for describing the present invention, and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The liquid injection needle is characterized by comprising a needle body (1), wherein the needle body adopts a hollow structure, and the needle head of the needle body adopts a conical shape; be connected with on the needle body and control notes liquid structure (2), it includes pole section (21) of being connected with the needle body to annotate the liquid structure, be close to in the pole section in the one end of needle body be connected with annotate liquid pipe (3) that the inner chamber of needle body is linked together, be connected in the pole section have set up in annotate the spacer (22) of liquid pipe top, annotate the intraductal diaphragm that is used for opening and close the notes liquid pipe of installing of liquid, be equipped with in the pole section and pass spacer and with diaphragm core bar (23) that the diaphragm is connected, be connected with on the pole section and make diaphragm core bar follow pole section length direction round trip movement's gas accuse subassembly (24) in.
2. The liquid injection needle according to claim 1, wherein a sealing assembly (4) which extends into the needle head and is controlled by the pneumatic control assembly is installed in the rod section, the sealing assembly comprises a liquid outlet core rod (41) of which the upper end is installed in the rod section and the lower end extends into the needle head, and a pinhole sealing element (42) installed in the needle head, the liquid outlet core rod can penetrate through the pinhole sealing element to enable the lower end of the liquid outlet core rod to be arranged between the pinhole sealing element and a needle opening of the needle head, and the pneumatic control assembly can enable the liquid outlet core rod and the diaphragm core rod to synchronously move back and forth along the length direction of the rod section.
3. The injection needle according to claim 2, wherein the needle hole sealing element comprises a support ring (421) arranged in the needle head, an O-ring (422) connected to the support ring, and a sealing ring arranged on the O-ring, and the support ring is provided with a through hole (423).
4. The liquid injection needle according to claim 1 or 2, wherein the rod section comprises an injection section (211), a pneumatic control section (212), a spring section (213) and an air inlet section (214) in sequence from one end close to the needle body along the length direction of the rod section, the pneumatic control assembly comprises an air inlet pipe (241) arranged on the air inlet section, two shunting channels (242) arranged on the air inlet section and communicated with the air inlet pipe, a shunting gasket (243) connected to the lower end of the air inlet section, two diversion pipelines (244) arranged in the spring section and respectively butted with the two shunting channels, and a diversion gasket (245) connected to the lower end of the spring section, the diaphragm core rod and the liquid outlet core rod both adopt T-shaped structures, the pneumatic control section and the spring section are both provided with a pair of guide grooves (247) arranged along the length direction of the rod section, the isolating gasket is provided with a diversion groove for communicating the diversion pipeline with the guide groove arranged in the pneumatic control section, the spring section is internally provided with a return groove for communicating the guide groove in the spring section with the diversion channel, and gas in the gas inlet pipe enters the pneumatic control section along the two diversion pipelines and the corresponding diversion pipelines and enables the diaphragm core bar and the liquid outlet core bar to move towards the spring section in the guide groove.
5. The needle of claim 4, wherein the spring section has two guide grooves in which return springs (246) are mounted, and one end of each return spring close to the gas hole section is connected to the liquid outlet core bar and the membrane core bar respectively.
6. The liquid injection needle according to claim 4, wherein the liquid injection section, the pneumatic control section, the spring section and the air inlet section are connected with each other through threads.
7. The liquid injection needle according to claim 4, wherein the liquid injection section is in threaded connection with the needle body, and a sealing member (5) is arranged at the connection part of the liquid injection section and the needle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870244.0A CN111969174A (en) | 2020-08-26 | 2020-08-26 | Liquid injection needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870244.0A CN111969174A (en) | 2020-08-26 | 2020-08-26 | Liquid injection needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111969174A true CN111969174A (en) | 2020-11-20 |
Family
ID=73391487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010870244.0A Pending CN111969174A (en) | 2020-08-26 | 2020-08-26 | Liquid injection needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111969174A (en) |
Citations (14)
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| JP2011134631A (en) * | 2009-12-25 | 2011-07-07 | Shibuya Kogyo Co Ltd | Method and device for filling battery container with electrolyte |
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| CN107394105A (en) * | 2017-07-20 | 2017-11-24 | 无锡先导智能装备股份有限公司 | Battery liquid-filling device and method |
| CN210628406U (en) * | 2019-11-04 | 2020-05-26 | 东莞市典名智能装备科技有限公司 | Lengthened one-way liquid injection valve |
-
2020
- 2020-08-26 CN CN202010870244.0A patent/CN111969174A/en active Pending
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| US6248138B1 (en) * | 1999-06-09 | 2001-06-19 | Delphi Technologies, Inc. | Activation and sealing of storage batteries |
| JP2011134631A (en) * | 2009-12-25 | 2011-07-07 | Shibuya Kogyo Co Ltd | Method and device for filling battery container with electrolyte |
| EP2416039A1 (en) * | 2010-08-04 | 2012-02-08 | Uster di Pellin Mario & C. S.n.c. | Diaphragm valve |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201120 |