CN213845456U - Pump suction type auxiliary negative pressure quantitative vacuumizing liquid injection device - Google Patents
Pump suction type auxiliary negative pressure quantitative vacuumizing liquid injection device Download PDFInfo
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- CN213845456U CN213845456U CN202023162635.1U CN202023162635U CN213845456U CN 213845456 U CN213845456 U CN 213845456U CN 202023162635 U CN202023162635 U CN 202023162635U CN 213845456 U CN213845456 U CN 213845456U
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Abstract
The utility model discloses a pump suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device, which comprises a pump suction type quantitative unit, an auxiliary negative pressure unit and a vacuum pumping liquid injection unit; the pump suction type quantitative unit is respectively connected with the vacuumizing liquid injection unit and the auxiliary negative pressure unit, and the auxiliary negative pressure unit is connected with the vacuumizing liquid injection unit; continuous liquid injection is realized, the liquid injection efficiency is high, and no electrolyte is wasted; the liquid injection efficiency of the battery can be improved, the liquid injection quality of the battery can be ensured, the quantitative precision and the repeated precision of the liquid injection of the battery are greatly improved, the requirement of the battery on the liquid injection precision is met, the liquid injection device is suitable for injecting aqueous solutions such as acidic electrolytes and alkaline electrolytes and the like and flowing liquids such as oil solutions and oily solutions with low viscosity, and has the advantages of high precision, high speed, large single liquid injection ration and easy expansion of an injection loop.
Description
Technical Field
The utility model relates to a battery production technical field especially relates to a supplementary negative pressure ration evacuation priming device of pump suction formula.
Background
In the production process of the secondary battery, there are two common methods for filling the electrolyte:
1. the self-flowing liquid injection is corresponding to the conditions that the internal assembly pressure of the battery is very small and the electrolyte is easy to permeate, and is multi-purpose for the rich liquid type battery. Because the rich liquid is filled, the precision of the filling amount of the battery is almost not required, and the capacity and the service life of the battery can be brought into full play by the rich liquid type battery. But because the environmental pollution is large, the finished product also becomes a dangerous product, the transportation requirement is very strict, and at present, most countries do not allow the production and use of the rich liquid type battery, so the corresponding gravity flow type liquid injection equipment is basically eliminated.
2. The vacuum-pumping type vacuum liquid injection corresponds to a poor liquid type battery, the internal assembly pressure of the battery is higher, the electrolyte is difficult to permeate, the battery is required to be in a vacuum negative pressure state before liquid injection, the electrolyte is sucked in mainly by the negative pressure in the battery during liquid injection, the battery after liquid injection is required to be in the poor liquid state, no free liquid can be on the surface, the electrolyte can not flow out even if the battery is broken, but the poor liquid type battery has extremely strict requirements on the amount of the injected electrolyte, the electrolyte is less, the capacity and the service life of the battery are easily influenced, the electrolyte is more, liquid leakage can be generated in the transportation process to cause danger, even the whole batch of cargoes are unqualified, and the injection precision of the electrolyte becomes the key of the vacuum liquid injection equipment.
The prior art lacks an electrolyte filling device which has high precision, high efficiency, energy conservation and environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model discloses annotate liquid inefficiency, annotate the not enough of liquid precision difference to present secondary battery electrolyte, provide a pump suction type supplementary negative pressure ration evacuation priming device, the liquid volume is annotated in the accurate control, easily realizes, improves battery and annotates liquid efficiency and quality, has simplified production flow, has created the green production mode of high efficiency, energy-conservation, environmental protection, has promoted the optimization promotion of battery trade production structure.
The utility model provides a concrete scheme as follows:
a pumping type auxiliary negative pressure quantitative vacuumizing liquid injection device comprises a pumping type quantitative unit, an auxiliary negative pressure unit and a vacuumizing liquid injection unit; the pump suction type quantitative unit is respectively connected with the vacuumizing liquid injection unit and the auxiliary negative pressure unit, and the auxiliary negative pressure unit is connected with the vacuumizing liquid injection unit;
the pumping type dosing unit includes:
the quantitative cylinder is used for quantitatively pumping the liquid to be injected;
the liquid pumping return pipe is inserted into the quantitative cylinder from the liquid inlet of the quantitative cylinder, and the insertion depth is adjusted by a liquid quantity adjusting rod connected with the upper end of the liquid pumping return pipe;
the liquid outlet of the pump liquid buffer is connected with the pump liquid return pipe;
the liquid taking pump is connected with the liquid pumping buffer and is used for pumping the liquid to be injected from the liquid storage container to the quantifying barrel;
the auxiliary negative pressure unit includes:
the liquid inlet of the pump liquid buffer and the connecting pipeline of the liquid taking pump are connected with the collecting barrel in parallel, and the parallel connecting pipeline is provided with a check valve; the collecting barrel is connected with a vacuum pump, a first vacuumizing valve is arranged on a pipeline connecting the collecting barrel with the vacuum pump, and the first vacuumizing valve and the check valve are used for generating negative pressure in the collecting barrel so as to keep no liquid on the inner wall of the liquid pumping return suction pipe to drip back into the quantitative cylinder along the pipe wall; the collecting barrel is used for collecting the liquid above the lower port of the liquid pumping return pipe and returning along the liquid pumping path;
the vacuum pumping liquid injection unit comprises:
the liquid inlet of the intermediate container is connected with the liquid outlet of the quantitative cylinder and used for storing a liquid body to be injected, and an upper pipe clamp is arranged on a connecting pipeline between the quantitative cylinder and the intermediate container;
the liquid receiving object is connected with the liquid outlet of the intermediate container, and a lower pipe clamp is arranged on a connecting pipeline of the intermediate container and the liquid receiving object; the liquid stored in the quantitative cylinder is injected into the liquid receiving object after passing through the intermediate container.
The vacuumizing buffer is connected with the vacuumizing port of the intermediate container;
and the vacuumizing pump is connected with the vacuumizing port of the vacuumizing buffer, and a second vacuumizing valve, a first atmospheric valve and a vacuum meter are connected to a pipeline connecting the vacuumizing pump and the vacuumizing buffer.
Furthermore, a second atmospheric valve is arranged at the top of the collecting barrel, and a liquid discharge valve is arranged at the bottom of the collecting barrel.
Furthermore, a vacuum filter is connected between the vacuum pumping pump and the vacuum pumping buffer and is used for filtering corrosive gas contained in the gas and protecting the vacuum pumping pump.
Furthermore, a bypass valve is connected to a connecting pipeline between the vacuum filter and the vacuumizing buffer and used for weakening vacuum strength and preventing liquid in a liquid receiving object from backflushing.
Furthermore, the pump liquid buffer is provided with a plurality of liquid outlets which are connected with a plurality of other pump liquid return pipes.
Furthermore, the vacuum-pumping buffer is provided with a plurality of air inlets which are connected with a plurality of other intermediate containers.
The utility model provides a pair of supplementary negative pressure ration evacuation priming device of pump suction formula has following technological effect:
1. continuous liquid injection is realized, the liquid injection efficiency is high, and no electrolyte is wasted; the liquid injection efficiency of the battery can be improved, the liquid injection quality of the battery is guaranteed, the quantitative precision and the repeated precision of liquid injection of the battery are greatly improved, the requirement of the battery on the liquid injection precision is met, the liquid injection process can be continuously and repeatedly performed, the liquid injection process of the battery is simplified, the liquid injection amount is accurately controlled, the performance, the capacity and the service life of the battery can be improved, and the consistency degree of the battery is effectively guaranteed.
2. The filling device is suitable for filling aqueous solutions such as acidic electrolytes and alkaline electrolytes and flowing liquids such as oil solutions and oily solutions with low viscosity, has the advantages of high precision, high speed, large single-time filling ration and easy expansion of a filling loop, and is particularly suitable for filling the electrolytes such as sealed storage batteries and lithium ion batteries with high control precision requirements and high filling difficulty.
3. An auxiliary negative pressure unit is arranged, and the liquid injection amount is accurately controlled, so that unnecessary electrolyte loss is avoided; through opening first evacuation valve and check valve, utilize pressure differential in order to keep pump liquid return suction pipe inner wall not have liquid along the pipe wall back drip back to the dosing section of thick bamboo, at this moment, stay waiting to annotate the liquid volume in the dosing section of thick bamboo and be exactly the required volume of filling, the precision of setting value in the dosing section of thick bamboo has been guaranteed, it is high to annotate the liquid precision, and through the collecting vessel, collect the backward flow of liquid more than the port along pump liquid route under the pump liquid return pipe, to the damage of evacuation pump when avoiding electrolyte suck-back, the electrolyte of backward flow is collected in the collecting vessel, can carry out reuse, reduce extravagantly, energy-conservation, environmental protection.
4. The expensive quantitative liquid injection pump is eliminated, the simultaneous and accurate liquid injection of a large number of battery cores in one period can be realized at lower manufacturing cost, and the liquid injection capacity can be conveniently adjusted; through opening or closing of control flap, greatly improved annotate liquid efficiency and reduced holistic notes liquid cost to and through a plurality of air inlets of evacuation buffer, and the setting of a plurality of liquid outlets of pump liquid buffer, realized the extension of the same functional unit of multiloop, be convenient for carry on multiple notes liquid capacity, annotate liquid many times.
Drawings
Fig. 1 is a schematic structural view of a pump-suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device according to embodiment 1 of the present invention;
fig. 2 is a first liquid injection flow chart of the pump-suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device in embodiment 1 of the present invention;
fig. 3 is a second liquid injection flow chart of the pump-suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device in embodiment 1 of the present invention;
in the figure: 1A, pumping liquid back suction pipe; 1B, liquid quantity adjusting rod; 3. a second vacuum valve; 4. a first atmospheric valve; 5. a vacuum pumping buffer; 6. a dosing cylinder; 7. a bypass valve; 8. a pump fluid buffer; 9. an upper pipe clamping device; 10. an intermediate container; 11. a vacuum pump is pumped; 12. a vacuum filter; 13. taking a liquid pump; 14. a lower pipe clamp; 15. a liquid receptor; 2. a vacuum gauge; 17. a first vacuum-pumping valve; 18. a second atmospheric valve; 19. a collection barrel; 20. a check valve; 21. a drain valve; 22. a liquid storage container.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to better understand the advantages and features of the present invention, and to define the scope of the present invention more clearly.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "head", "tail", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
Example 1
Referring to fig. 1, the embodiment provides a pump-suction type auxiliary negative-pressure quantitative vacuum pumping liquid injection device, which is particularly suitable for filling electrolytes with high control accuracy requirements and high filling difficulty for sealed storage batteries, lithium batteries and the like.
A pumping type auxiliary negative pressure quantitative vacuumizing liquid injection device comprises a pumping type quantitative unit, an auxiliary negative pressure unit and a vacuumizing liquid injection unit; the pump suction type quantitative unit is respectively connected with the vacuumizing liquid injection unit and the auxiliary negative pressure unit, and the auxiliary negative pressure unit is connected with the vacuumizing liquid injection unit;
the pumping type dosing unit includes:
the quantitative cylinder 6 is used for quantitatively pumping the liquid to be injected;
the liquid pumping return pipe 1A is inserted into the quantitative cylinder 6 from the liquid inlet thereof, and the insertion depth is adjusted by a liquid quantity adjusting rod 1B connected with the upper end of the liquid pumping return pipe 1A;
a liquid outlet of the liquid pumping buffer 8 is connected with the liquid pumping return pipe 1A;
a liquid taking pump 13 connected with the liquid inlet of the pump liquid buffer 8 and used for taking the liquid to be injected from the liquid storage container 22 to the quantitative cylinder 6;
the auxiliary negative pressure unit includes:
a liquid inlet of the pump liquid buffer 8 and a connecting pipeline of the liquid taking pump 13 are connected with a collecting barrel 19 in parallel, and a check valve 20 is arranged on the parallel connecting pipeline; the collecting barrel 19 is connected with the vacuum pump 11, a vacuum pumping valve 17 is arranged on a pipeline connecting the collecting barrel 19 with the vacuum pump 11, and the vacuum pumping valve 17 and the check valve 20 are used for generating negative pressure in the collecting barrel 19 so as to keep no liquid on the inner wall of the liquid pumping return pipe 1A to drip back into the quantitative cylinder 6 along the pipe wall; a collecting barrel 19 for collecting the liquid above the lower port of the liquid pumping return pipe 1A and returning along the liquid pumping path;
the vacuum pumping liquid injection unit comprises:
the liquid inlet of the intermediate container 10 is connected with the liquid outlet of the quantifying cylinder 6 and is used for storing a liquid to be injected, and an upper pipe clamp 9 is arranged on a connecting pipeline between the quantifying cylinder 6 and the intermediate container 10; the liquid to be injected is controlled by the upper pipe clamping device 9 to be pumped into the intermediate container 10 from the dosing cylinder 6.
A liquid receiving object 15 connected with the liquid outlet of the intermediate container 10, and a lower pipe clamp 14 is arranged on a connecting pipeline of the intermediate container 10 and the liquid receiving object 15; the lower pipe clamp 14 controls the filling of the liquid to be filled from the intermediate container 10 to the liquid receiving object 15; the liquid stored in the measuring cylinder 6 is injected into the liquid receiver 15 after passing through the intermediate container 10.
An air inlet of the vacuum buffer 5 is connected with a vacuum port of the intermediate container 10;
and the vacuumizing pump 11 is connected with the vacuumizing port of the vacuumizing buffer 5, a second vacuumizing valve 3, a first atmospheric valve 4 and a vacuum meter 2 are further connected to a pipeline connecting the vacuumizing pump and the vacuumizing buffer, and the vacuum meter 2 monitors the vacuum degree in the liquid injection process loop.
Wherein, the top of the collecting barrel 19 is provided with a second atmospheric valve 18 for eliminating the negative pressure in the collecting barrel 19, and the bottom of the collecting barrel 19 is provided with a liquid discharge valve 21 for discharging the liquid in the collecting barrel.
A vacuum filter 12 is connected between the vacuum pumping pump 11 and the vacuum pumping buffer 5 and is used for filtering corrosive gas contained in the gas and protecting the vacuum pumping pump 11; the connecting pipeline of the vacuum filter 12 and the vacuumizing buffer 5 is also connected with a bypass valve 7 for weakening the vacuum strength and preventing the liquid in the liquid receiving object from backflushing.
The pump liquid buffer 8 is provided with a plurality of liquid outlets which are connected with other pump liquid return pipes 1A, so that the function unit expansion of the quantitative part is realized; the vacuum-pumping buffer 5 has a plurality of air inlets connected to other intermediate containers 10, thereby realizing the expansion of the functional units of the vacuum-pumping part.
The control unit controls the first vacuumizing valve 17, the second vacuumizing valve 3, the first atmospheric valve 4, the second atmospheric valve 18, the bypass valve 7, the upper pipe clamping device 9 and the lower pipe clamping device 14, and the vacuum pump 11 and the liquid taking pump 13 are matched to realize vacuumizing, air introducing and vacuum degree adjustment, so that the processes of extracting a liquid to be injected into a quantifying barrel, generating auxiliary negative pressure for accurate quantification, quantifying the liquid to be injected into the intermediate container 10, vacuumizing, injecting the liquid to be injected and the like are realized.
Two injection methods of the pump-suction type auxiliary negative pressure quantitative vacuum pumping injection device in the embodiment are provided, and reference is made to fig. 2 and 3 respectively according to the size of the injection capacity.
When the injection capacity is less than 50mL, the injection method comprises the following steps:
and S1, the first vacuumizing valve 17, the second vacuumizing valve 3, the first atmospheric valve 4, the second atmospheric valve 18, the bypass valve 7, the upper pipe clamp 9 and the lower pipe clamp 14 are all closed, and the vacuumizing pump 11 is opened to form a vacuum source.
Meanwhile, the liquid pump return suction pipe 1A is inserted into the quantitative cylinder 6 from the liquid inlet of the quantitative cylinder 6 through the liquid amount adjusting rod 1B, so that the lower port of the liquid pump return suction pipe 1A is flush with the scale position of the liquid injection amount required on the quantitative cylinder 6, and the liquid outlet of the quantitative cylinder 6 is closed;
s2, opening the liquid taking pump 13, pumping the liquid to be injected into the pump liquid buffer 8 from the liquid storage container 22, and pumping the liquid to be injected into the dosing cylinder 6 through the pump liquid return pipe 1;
s3, when the metering cylinder 6 is full, the liquid taking pump 13 is closed, and the liquid pumping is stopped; the liquid to be injected is then quantified.
S4, opening the lower pipe clamp 14 and the second vacuum valve 3, and opening the second vacuum valve 3 and the lower pipe clamp 14 to achieve the purpose of vacuumizing the intermediate container 10, the liquid receiving object and the corresponding connecting pipeline as the vacuum pump 11, the vacuum filter 12 and the loop between the second vacuum valve 3 are all in a vacuum state;
s5, closing the second vacuum-pumping valve 3 and suspending vacuum-pumping;
s6, opening the first evacuation valve 17 and the check valve 20; after the liquid taking pump 13 stops pumping liquid, liquid in the pipeline begins to flow back due to self gravity, the liquid above the lower port of the liquid pumping return suction pipe 1A is sucked back, when the liquid flows through the liquid pumping buffer 8 and approaches a liquid inlet below the liquid pumping buffer 8 in the process of sucking back, the first vacuum pumping valve 17 and the check valve 20 are opened, auxiliary negative pressure is generated on the liquid pumping return suction pipe 1A to keep no liquid on the inner wall of the liquid pumping return suction pipe 1A to drip back to the quantifying cylinder 6 along the pipe wall, at the moment, the amount of the liquid to be injected left in the quantifying cylinder 6 is the amount required by injection, and the liquid on the inner wall of the liquid pumping return suction pipe 1A enters the collecting cylinder 19 along the pipe wall, the connecting pipeline of the liquid pumping return suction pipe 1A and the liquid pumping buffer 8, and the connecting pipeline of the liquid pumping buffer 8 and the collecting cylinder 19;
s7, opening the upper pipe clamp 9, opening the liquid outlet of the quantitative cylinder 6, and allowing the quantitative liquid to be injected in the quantitative cylinder 6 to flow into the intermediate container 10;
s8, closing the upper pipe clamp 9, closing the first vacuum-pumping valve 17 and the check valve 20, and stopping generating auxiliary negative pressure; opening the second atmospheric valve 18 and the drain valve 21 to release the liquid in the collection barrel 19;
s9, opening the second vacuumizing valve 3 and vacuumizing again;
s10, opening the first atmospheric valve 4 and the bypass valve 7, closing the second vacuumizing valve 3, filling the liquid to be injected in the intermediate container 10 into the liquid-receiving object under the action of air, and opening the bypass valve 7 to weaken the vacuum strength of the circuit at the moment so as to prevent the liquid in the liquid-receiving object from backflushing;
s11, when no liquid to be injected flows out of the intermediate container 10, if the intermediate container 10 still contains the liquid to be injected, executing the steps S9 and S10, otherwise executing the step S12;
and S12, closing the lower tube holder 14 and ending the primary liquid injection process.
When the liquid injection capacity is larger than 200mL, the second vacuumizing valve 3 is continuously opened, so that before liquid injection, a single liquid injection quantitative mode is large, the final liquid injection amount is accurately controlled in a pre-vacuumizing mode, and specifically, the liquid injection method comprises the following steps:
and S1, the first vacuumizing valve 17, the second vacuumizing valve 3, the first atmospheric valve 4, the second atmospheric valve 18, the bypass valve 7, the upper pipe clamp 9 and the lower pipe clamp 14 are all closed, and the vacuumizing pump 11 is opened to form a vacuum source.
Meanwhile, the liquid pump return suction pipe 1A is inserted into the quantitative cylinder 6 from the liquid inlet of the quantitative cylinder 6 through the liquid amount adjusting rod 1B, so that the lower port of the liquid pump return suction pipe 1A is flush with the scale position of the liquid injection amount required on the quantitative cylinder 6, and the liquid outlet of the quantitative cylinder 6 is closed;
s2, opening the liquid taking pump 13, pumping the liquid to be injected into the pump liquid buffer 8 from the liquid storage container 22, and pumping the liquid to be injected into the dosing cylinder 6 through the pump liquid return pipe 1;
s3, when the metering cylinder 6 is full, the liquid taking pump 13 is closed, and the liquid pumping is stopped; the liquid to be injected is then quantified.
S4, opening the lower pipe clamp 14 and the second vacuum valve 3, and opening the second vacuum valve 3 and the lower pipe clamp 14 to achieve the purpose of vacuumizing the intermediate container 10, the liquid receiving object and the corresponding connecting pipeline as the vacuum pump 11, the vacuum filter 12 and the loop between the second vacuum valve 3 are all in a vacuum state;
s5, closing the lower pipe clamp 14;
s6, opening the first evacuation valve 17 and the check valve 20; after the liquid taking pump 13 stops pumping liquid, liquid in the pipeline begins to flow back due to self gravity, the liquid above the lower port of the liquid pumping return suction pipe 1A is sucked back, when the liquid flows through the liquid pumping buffer 8 and approaches a liquid inlet below the liquid pumping buffer 8 in the process of sucking back, the first vacuum pumping valve 17 and the check valve 20 are opened, auxiliary negative pressure is generated on the liquid pumping return suction pipe 1A to keep no liquid on the inner wall of the liquid pumping return suction pipe 1A to drip back to the quantifying cylinder 6 along the pipe wall, at the moment, the amount of the liquid to be injected left in the quantifying cylinder 6 is the amount required by injection, and the liquid on the inner wall of the liquid pumping return suction pipe 1A enters the collecting cylinder 19 along the pipe wall, the connecting pipeline of the liquid pumping return suction pipe 1A and the liquid pumping buffer 8, and the connecting pipeline of the liquid pumping buffer 8 and the collecting cylinder 19;
s7, opening the upper pipe clamp 9, opening the liquid outlet of the quantitative cylinder 6, and allowing the quantitative liquid to be injected in the quantitative cylinder 6 to flow into the intermediate container 10;
s8, closing the upper pipe clamp 9, closing the first vacuum-pumping valve 17 and the check valve 20, and stopping generating auxiliary negative pressure; opening the second atmospheric valve 18 and the drain valve 21 to release the liquid in the collection barrel 19;
s9, opening the lower pipe clamp 14 and the second vacuumizing valve 3, and vacuumizing again;
s10, opening the first atmospheric valve 4 and the bypass valve 7, closing the second vacuumizing valve 3, filling the liquid to be injected in the intermediate container 10 into the liquid-receiving object under the action of air, and opening the bypass valve 7 to weaken the vacuum strength of the circuit at the moment so as to prevent the liquid in the liquid-receiving object from backflushing;
s11, when no liquid to be injected flows out of the intermediate container 10, if the intermediate container 10 still contains the liquid to be injected, executing the steps S9 and S10, otherwise executing the step S12;
and S12, closing the lower tube holder 14 and ending the primary liquid injection process.
The whole process of realizing the functions of the device is realized by an automatic PLC (Programmable logic controller) program, the liquid injection amount is accurately controlled, the opening and closing of a valve, the auxiliary negative pressure intervention time and time, the amount of the liquid injection amount and the like are automatically controlled, so that the labor intensity is reduced, and the production efficiency is improved; the liquid injection precision is higher and can reach +/-0.3%; the device injects liquid in batches, a plurality of products which pass through the liquid injection at one time can be obtained, the phenomenon of repeated liquid injection is avoided, the labor efficiency is greatly improved, the consistency of the liquid injection is good, the quality of the liquid injection is ensured, the energy conservation and the consumption reduction are realized, the process method is advanced and reasonable, and the using effect is good; the waste is reduced, the energy is saved, the environment is protected, the liquid injection efficiency is higher, and the production flow is simplified; continuous liquid injection is realized, the liquid injection efficiency is high, and no electrolyte is wasted; the liquid injection efficiency of the battery can be improved, the liquid injection quality of the battery can be ensured, the quantitative precision and the repeated precision of the liquid injection of the battery can be greatly improved, the requirement of the battery on the liquid injection precision can be met, the liquid injection device is suitable for injecting aqueous solutions such as acid electrolytes and alkaline electrolytes and the like and flowing liquids such as oil solutions and oily solutions with low viscosity, the advantages of high precision, high speed, large single liquid injection quantity and easy expansion of a liquid injection loop can be realized, a quantitative liquid injection pump with high price can be omitted, the simultaneous accurate liquid injection of a large number of battery cores in one period can be realized with low manufacturing cost, and the liquid injection capacity can be conveniently adjusted; by controlling the opening or closing of the valve, the liquid injection efficiency is greatly improved and the liquid injection cost is reduced.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. A pumping type auxiliary negative pressure quantitative vacuumizing liquid injection device is characterized by comprising a pumping type quantitative unit, an auxiliary negative pressure unit and a vacuumizing liquid injection unit; the pump suction type quantitative unit is respectively connected with the vacuumizing liquid injection unit and the auxiliary negative pressure unit, and the auxiliary negative pressure unit is connected with the vacuumizing liquid injection unit;
the pumping type dosing unit includes:
the quantitative cylinder (6) is used for quantitatively pumping the liquid to be injected;
the liquid pumping return pipe (1A) is inserted into the quantitative cylinder (6) from a liquid inlet of the quantitative cylinder, and the insertion depth is adjusted by a liquid quantity adjusting rod (1B) connected with the upper end of the liquid pumping return pipe (1A);
a liquid outlet of the liquid pumping buffer (8) is connected with the liquid pumping return pipe (1A);
the liquid taking pump (13) is connected with the liquid pumping buffer (8) and is used for pumping the liquid to be injected from the liquid storage container (22) to the dosing cylinder (6);
the auxiliary negative pressure unit includes:
a liquid inlet of the pump liquid buffer (8) and a connecting pipeline of the liquid taking pump (13) are connected with a collecting barrel (19) in parallel, and a check valve (20) is arranged on the parallel connecting pipeline; the collecting barrel (19) is connected with the vacuum-pumping pump (11), a first vacuum-pumping valve (17) is arranged on a pipeline connecting the collecting barrel (19) and the vacuum-pumping pump (11), and the first vacuum-pumping valve (17) and the check valve (20) are used for generating negative pressure in the collecting barrel (19) so as to keep no liquid on the inner wall of the liquid-pumping return suction pipe (1A) to drip back into the quantitative cylinder (6) along the pipe wall; the collecting barrel (19) is used for collecting the liquid above the lower port of the liquid pumping return pipe (1A) and returning along the liquid pumping path;
the vacuum pumping liquid injection unit comprises:
the liquid inlet of the intermediate container (10) is connected with the liquid outlet of the quantifying cylinder (6) and is used for storing a liquid to be injected, and an upper pipe clamping device (9) is arranged on a connecting pipeline between the quantifying cylinder (6) and the intermediate container (10);
the liquid receiving object (15) is connected with the liquid outlet of the intermediate container (10), and a lower pipe clamping device (14) is arranged on a connecting pipeline of the intermediate container (10) and the liquid receiving object (15); the liquid stored in the quantitative cylinder (6) passes through the intermediate container (10) and then is injected into the liquid receiving object;
a vacuum-pumping buffer (5) connected to a vacuum-pumping port of the intermediate container (10);
and the vacuumizing pump (11) is connected with the vacuumizing port of the vacuumizing buffer (5), and a second vacuumizing valve (3), a first atmospheric valve (4) and a vacuum meter (2) are connected to a pipeline connecting the vacuumizing buffer and the vacuumizing buffer.
2. The pumping type auxiliary negative pressure quantitative vacuum pumping liquid injection device as claimed in claim 1, wherein a second atmospheric valve (18) is arranged at the top of the collecting barrel (19), and a liquid discharge valve (21) is arranged at the bottom of the collecting barrel (19).
3. The pumping type auxiliary negative pressure quantitative vacuum pumping and liquid injecting device according to claim 1, wherein a vacuum filter (12) is further connected between the vacuum pumping pump (11) and the vacuum pumping buffer (5) and is used for filtering corrosive gas contained in the gas and protecting the vacuum pumping pump (11).
4. The pump suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device as claimed in claim 3, wherein a bypass valve (7) is further connected to a connecting pipeline of the vacuum filter (12) and the vacuum pumping buffer (5) for weakening vacuum strength and preventing liquid in liquid receiving objects from backflushing.
5. The pump-suction type auxiliary negative-pressure quantitative vacuum pumping and liquid injecting device as claimed in claim 1, wherein the pump liquid buffer (8) has a plurality of liquid outlets connected with a plurality of other pump liquid return pipes (1A).
6. The pump suction type auxiliary negative pressure quantitative vacuum pumping liquid injection device as claimed in claim 1, wherein the vacuum pumping buffer (5) has a plurality of air inlets connected with other intermediate containers (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023162635.1U CN213845456U (en) | 2020-12-23 | 2020-12-23 | Pump suction type auxiliary negative pressure quantitative vacuumizing liquid injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023162635.1U CN213845456U (en) | 2020-12-23 | 2020-12-23 | Pump suction type auxiliary negative pressure quantitative vacuumizing liquid injection device |
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| Publication Number | Publication Date |
|---|---|
| CN213845456U true CN213845456U (en) | 2021-07-30 |
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|---|---|---|---|
| CN202023162635.1U Active CN213845456U (en) | 2020-12-23 | 2020-12-23 | Pump suction type auxiliary negative pressure quantitative vacuumizing liquid injection device |
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| CN (1) | CN213845456U (en) |
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2020
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