CN211397788U

CN211397788U - Liquid metering pump and electrolyte filling equipment

Info

Publication number: CN211397788U
Application number: CN201922154844.2U
Authority: CN
Inventors: 周艳兴; 杨昆
Original assignee: Shenzhen Yijiexun Automation Equipment Co ltd
Current assignee: Shenzhen Yijiexun Automation Equipment Co ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-09-01
Anticipated expiration: 2029-12-04

Abstract

The utility model provides a liquid metering pump and electrolyte filling equipment relates to liquid metering pump technical field. The utility model discloses a liquid metering pump includes: a pump body for containing a liquid to be metered; a plunger connected to the pump body in a manner movable relative to the pump body; the driving device is used for driving the plunger to move a preset distance relative to the pump body; and the liquid path control device is used for cutting off or communicating the liquid inlet path and the liquid outlet path of the pump body so as to enable the liquid to be metered to enter or discharge the liquid metering pump. The utility model discloses an electrolyte filling equipment includes aforementioned liquid metering pump. The utility model discloses a liquid metering pump and electrolyte filling equipment can solve current liquid metering pump liquid injection volume and be difficult to change along with the production requirement is quick nimble, and liquid injection volume adjustment is long, the extravagant many technical problem of adjustment process material.

Description

Liquid metering pump and electrolyte filling equipment

Technical Field

The utility model relates to a liquid metering pump technical field specifically is a liquid metering pump and have this liquid metering pump's electrolyte filling equipment.

Background

Many products require precise injection of certain specific liquids in production, for example, in lithium battery production, and in pharmaceutical dosing perfusion, precise injection of a specific amount of liquid is often required. In the prior art, an electric liquid injection pump is generally used for injecting liquid, although the precision is controllable, when production requirements such as product models are changed in some production processes, the injection amount of the injected liquid is required to be changed correspondingly, the electric liquid injection pump mostly adopts a manual adjustment mode to change the injection amount, and as the precision requirement of the liquid injection amount is high, a professional spends a long time on stable metering, and the time and the materials are wasted.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a liquid metering pump and electrolyte filling equipment for solve current liquid metering pump liquid injection volume and be difficult to change along with the production requirement fast accurately, liquid injection volume adjustment time is long, the extravagant many technical problem of adjustment process material.

First aspect the utility model provides a liquid metering pump, liquid metering pump includes:

the pump body is used for containing liquid to be metered;

a plunger connected to the pump body so as to be movable in an axial direction thereof relative to the pump body;

the driving device is used for driving the plunger to move for a preset distance along the axial direction of the pump body relative to the pump body according to the volume of liquid to be metered entering the pump body or discharged from the pump body as required, and comprises an output component for outputting linear motion;

and the transmission adjusting device is used for adjusting the relative position and/or angle of the output part of the driving device and the plunger in the process of driving the plunger to move along the axial direction of the pump body by the driving device.

And the liquid path control device is used for cutting off or communicating the liquid inlet path and the liquid outlet path of the pump body when the plunger moves relative to the pump body to change the volume of the accommodating space so as to enable the liquid to be metered to enter or discharge the liquid metering pump.

Preferably, the one end of plunger with drive arrangement transmission is connected, and the opposite other end inserts in the pump body, when the plunger removed towards the direction of keeping away from the pump body, liquid path controlling means cuts off the liquid outlet passageway of the pump body and communicates the inlet passage of the pump body so that wait to measure liquid gets into the liquid metering pump by the inlet passage, when the plunger removed towards the direction that is close to the pump body, liquid path controlling means cut off the inlet passage of the pump body and communicate the liquid outlet passageway of the pump body so that wait to measure liquid discharge liquid metering pump by the outlet passage.

Preferably, the driving device further comprises a motor and a ball screw, wherein the motor is used for driving the ball screw to drive the plunger to do reciprocating linear motion relative to the pump body through the output component.

Preferably, the transmission correction device includes a first joint bearing, a second joint bearing and a connecting rod, the output member is formed with a first bearing mounting hole for mounting the first joint bearing and a second bearing mounting hole for mounting the second joint bearing, the first bearing mounting hole and the second bearing mounting hole are located at two sides of the plunger in the radial direction, two opposite ends of the connecting rod in the radial direction of the plunger are respectively connected with the first joint bearing and the second joint bearing, and the middle of the connecting rod is connected with the plunger.

Preferably, the liquid metering pump comprises a plurality of pairs of pump bodies and plungers which are arranged side by side in a direction perpendicular to the guiding direction of the guiding mechanism, and a connecting rod, a first knuckle bearing and a second knuckle bearing which are in one-to-one correspondence with each plunger, and each plunger is connected with the corresponding first knuckle bearing and second knuckle bearing through the corresponding connecting rod.

Preferably, the output part includes a driving connection plate, a bottom plate, a top plate and an intermediate connection plate, one end of the driving connection plate is in transmission connection with the ball screw, the other opposite end of the driving connection plate is connected with the bottom plate, the bottom plate is connected with the moving member of the guide mechanism, the first bearing installation hole is formed in the bottom plate, the top plate is connected with the bottom plate through the intermediate connection plate, the second bearing installation hole is formed in the top plate, and the bottom plate and the top are respectively located on two sides of the plunger in the radial direction.

Preferably, the liquid path control device includes a two-position three-way electromagnetic valve, when the liquid metering pump feeds liquid, the two-position three-way electromagnetic valve is switched to a state that the liquid inlet path of the liquid metering pump is opened and the liquid outlet path of the liquid metering pump is closed, and when the liquid metering pump column discharges liquid, the two-position three-way electromagnetic valve is switched to a state that the liquid inlet path of the liquid metering pump is closed and the liquid outlet path of the liquid metering pump is opened.

Preferably, the liquid path control device further comprises a flow guide block, the flow guide block is rectangular, a connecting hole communicated with the accommodating space is formed in the flow guide block, one surface of the flow guide block is abutted to one surface of the two-position three-way electromagnetic valve, which is provided with a valve port, the flow guide block comprises a middle flow hole formed by extending one surface of the flow guide block abutted to the two-position three-way electromagnetic valve to the position communicated with the connecting hole in the direction opposite to the two-position three-way electromagnetic valve, a liquid inlet hole and a liquid outlet hole are further formed in the flow guide block, the flow guide block comprises a liquid inlet flow guide hole formed by extending one surface of the flow guide block abutted to the two-position three-way electromagnetic valve to the position communicated with the liquid inlet hole in the direction opposite to the two-position three-way electromagnetic valve, the flow guide block comprises a flow guide hole formed by extending one surface of the flow guide block abutted to the two-position three-position electromagnetic valve to the liquid outlet hole in, when the liquid metering pump feeds liquid, the flow hole is communicated with the liquid inlet diversion hole through a two-position three-way electromagnetic valve, and when the liquid metering pump discharges liquid, the flow hole is communicated with the liquid outlet diversion hole through a two-position three-way electromagnetic valve.

Preferably, the device further comprises a detection device and a controller, wherein the detection device is used for generating a trigger signal when the plunger is detected to move to the preset position and sending the trigger signal to the controller, and the controller controls the driving device to stop the plunger at the current position according to the received trigger signal.

In a second aspect, the present invention provides an electrolyte filling apparatus, wherein the electrolyte filling apparatus includes the first aspect of the liquid metering pump.

Has the advantages that: the utility model discloses a liquid metering pump passes through drive arrangement and electrolyte filling equipment, can drive the relative pump body of plunger according to the volume of filling liquid and remove predetermined distance, and through correcting unit, adjust drive arrangement's output and the relative position and/or the angle of plunger at the in-process that drive arrangement drive plunger removed, eliminate the transmission error that the power that causes with pump body axial direction nonparallel among the transmission process, make the plunger along with drive arrangement's output member along pump body axial direction synchronous motion, the precision that the plunger removed along pump body axial direction has been guaranteed. Since the amount of liquid entering or exiting the pump body is linear with the distance traveled by the plunger, the amount of liquid poured can be precisely controlled by precisely controlling the distance traveled by the plunger. And when the production requirement is changed, the liquid filling amount can be accurately changed only by the moving distance of the plunger, so that the manual adjustment process is saved, the adjustment time is saved, and the material waste is avoided.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings, and these drawings are all within the protection scope of the present invention.

Fig. 1 is a schematic structural view of a liquid metering pump according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a driving device according to embodiment 2 of the present invention.

Fig. 3 is a schematic structural view of a transmission connection mechanism according to embodiment 2 of the present invention.

Fig. 4 is a partial structural schematic view of a transmission connection mechanism according to embodiment 2 of the present invention.

Fig. 5 is a schematic structural view of a liquid path control device according to embodiment 4 of the present invention.

Parts and numbering in the drawings: the pump body 100, the plunger 200, the driving device 300, the motor 310, the ball screw 320, the output part 330, the first joint bearing 331, the second joint shaft 332, the connecting rod 333, the driving connecting plate 334, the bottom plate 335, the top plate 336, the middle connecting plate 337, the fixing part 341, the moving part 342, the liquid path control device 400, the two-position three-way electromagnetic valve 410, the flow guide block 420, the liquid inlet hole 421, the liquid outlet hole 422, the middle flow hole 423, the liquid inlet flow guide hole 424, the liquid outlet flow guide hole 425, the photoelectric switch 500, and the inductive probe 600.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, the various features of the embodiments and examples of the present invention may be combined with each other and are within the scope of the present invention.

Example 1:

as shown in fig. 1, the present embodiment provides a liquid metering pump, which uses a driving device 300, which drives a plunger 200 to move a predetermined distance relative to a pump body 100 according to the amount of a poured liquid, and cooperates with the control action of a liquid path control device 400, wherein the liquid path control device 400 cuts off a liquid outlet path of the pump body 100 and communicates with a liquid inlet path of the pump body 100 when the plunger 200 moves the predetermined distance in the direction opposite to the direction of the pump body 100, so as to allow a specific amount of the liquid to be metered to enter the liquid metering pump, and the liquid path device cuts off the liquid inlet path of the pump body 100 and communicates with the liquid outlet path of the pump body 100 when the plunger 200 moves the predetermined distance in the direction of the pump body 100, so as to allow the specific amount of the liquid to be. Since the amount of liquid entering or exiting the pump body 100 is linearly related to the distance traveled by the plunger 200, the amount of liquid poured can be precisely controlled by precisely controlling the distance traveled by the plunger 200. And only the distance that the plunger 200 moves is required to achieve accurate changes in liquid fill volume when changes in production requirements result in changes in liquid fill volume.

As shown in fig. 1 and 2, the liquid metering pump of the present embodiment includes:

a pump body 100 for containing a liquid to be metered;

a plunger 200 connected to the pump body 100 in a manner movable in an axial direction thereof with respect to the pump body 100, one end of the plunger 200 and an inner wall of the pump body 100 enclosing a receiving space for receiving a liquid to be measured, the plunger 200 moving with respect to the pump body 100 to change a volume of the receiving space;

the plunger 200 is connected to the pump body 100 in a manner that one end of the plunger 200 is in transmission connection with the driving device 300, and the other end is inserted into the pump body 100. The pump body 100 may have a hollow cylindrical inner wall. An end of the plunger 200 connected to the driving device 300 is exposed to the outside of the pump body 100 to facilitate transmission, and a portion of the end inserted into the pump body 100 near the bottom of the pump body 100 is cylindrical, wherein the cylindrical outer surface of the plunger 200 cooperates with the inner wall of the pump body 100 to form a seal, and the plunger 200 reciprocates along the axial direction of the pump body 100. The end surface of the plunger 200 inserted into the pump body 100 closest to the bottom of the pump body 100 and the inner wall of the pump body 100 define a relatively closed space, i.e., a receiving space, in the pump body 100 for receiving a liquid substance to be poured, and the volume of the space changes as the plunger 200 reciprocates. In order to ensure the precision of liquid injection and the durability of products, the plunger 200 and the valve body are made of ceramic materials with good dimensional stability and high chemical stability.

A driving device 300 for driving the plunger 200 to move a preset distance relative to the pump body 100 according to the volume of the liquid to be metered which needs to enter the pump body 100 or be discharged from the pump body 100;

a driving device 300 for driving the plunger 200 to move a preset distance in an axial direction of the pump body 100 relative to the pump body 100 according to a volume of a liquid to be metered which is required to enter the pump body 100 or to be discharged from the pump body 100, wherein the driving device 300 comprises an output part 330 for outputting a linear motion;

wherein the driving device 300 can drive the plunger 200 to reciprocate relative to the pump body 100. In one case, the plunger 200 moves in a direction opposite to the direction of the pump body 100, that is, the plunger 200 moves in a direction away from the pump body 100, that is, the plunger 200 moves backwards, at this time, because the end surface of the plunger 200 forming the accommodating space with the pump body 100 is farther and farther from the bottom of the pump body 100, the volume of the accommodating space is increased, negative pressure is formed inside the pump, and then the liquid outside the pump body 100 is sucked into the accommodating space under the action of the negative pressure in cooperation with the action of the liquid path control device 400. In another case, the plunger 200 moves towards the pump body 100, that is, the plunger 200 makes forward movement, because the end surface of the plunger 200 forming the accommodating space with the pump body 100 is closer to the bottom of the pump body 100, the volume of the accommodating space is reduced, and then the plunger 200 pushes the liquid to be poured out of the pump body 100 during the movement in cooperation with the action of the liquid path control device 400. Since the amount of change in the volume of the receiving space is linear with the distance moved by the plunger 200, the amount of liquid to be poured can be precisely controlled by precisely controlling the moving distance of the plunger 200. And only the distance that the plunger 200 moves is required to achieve accurate changes in liquid fill volume when changes in production requirements result in changes in liquid fill volume.

And a transmission adjusting device, which forms a transmission connection between the output part 330 of the driving device 300 and the plunger 200 and is used for adjusting the relative position and/or angle of the output part 330 of the driving device 300 and the plunger in the process that the driving device 300 drives the plunger 200 to move along the axial direction of the pump body 100.

In the process of driving the plunger 200 to move by the driving device 300, due to a mounting error or the like, there may be a case where the moving direction transmitted to the plunger 200 is not parallel to the axial direction of the pump body 100. The direction of the driving force applied to the plunger 200 at this time is also not parallel to the axial direction of the pump body 100, easily causing structural deformation, thereby affecting the accuracy of the transmission. In this regard, the present embodiment provides a transmission adjustment device that forms a transmission connection between the output member 330 of the drive device and the plunger 200, and adjusts the relative position and/or angle of the output member 330 of the drive device 300 and the plunger 200 during the process in which the drive device 300 drives the plunger 200 to move in the axial direction of the pump body 100. At this time, if the moving direction of the plunger 200 is not parallel to the axial direction of the pump body 100, the transmission adjusting device can make the plunger 200 automatically adjust the relative position and/or angle between the plunger 200 and the output member 330 under the action of the force which is not parallel to the axial direction of the pump body 100, so that the moving output direction adjusted by the transmission adjusting device is consistent with the axial direction of the pump body 100, and the plunger 200 and the driving device 300 can synchronously move, thereby improving the moving precision of the plunger 200 and finally improving the liquid filling precision.

And a liquid path control device 400 for cutting off or communicating the liquid inlet path and the liquid outlet path of the pump body 100 to allow the liquid to be metered to enter or exit the liquid metering pump when the plunger 200 moves relative to the pump body 100 to change the volume of the accommodating space.

In a specific perfusion process, the control mode of the liquid path is as follows: when the plunger 200 moves in the direction opposite to the direction of the pump body 100 to increase the volume of the receiving space, the liquid path control device 400 cuts off the liquid outlet path of the pump body 100 and communicates with the liquid inlet path of the pump body 100 to make the liquid to be measured enter the liquid measuring pump, and when the plunger 200 moves in the direction of the pump body 100 to reduce the volume of the receiving space, the liquid path control device cuts off the liquid inlet path of the pump body 100 and communicates with the liquid outlet path of the pump body 100 to make the liquid to be measured discharge the liquid measuring pump.

Example 2

As shown in fig. 2 to 4, the present embodiment is optimized based on embodiment 1, wherein the driving device 300 includes a motor 310, a ball screw 320, and an output member 330, the motor 310 is configured to drive the ball screw 320 to drive the plunger 200 to perform a reciprocating linear motion relative to the pump body 100 through the output member 330. In operation, the motor 310 is coupled to a ball screw by a coupling, and a nut of the ball screw is coupled to the output member 330. The motor 310 drives the screw rod to rotate, the screw rod rotates to drive the nut to do reciprocating linear motion, the nut drives the output part 330 to do reciprocating linear motion, and finally the output part 330 drives the plunger 200 to do reciprocating linear motion. Thus controlling the angle of rotation of the motor 310 controls the distance the plunger 200 moves. The precision of the liquid filling amount can be effectively ensured due to the accurate transmission of the ball screw 320.

In addition, in order to enable the plunger 200 to accurately move in a straight line, the liquid metering pump of the present embodiment further includes a guiding mechanism, the guiding mechanism includes a fixed member 341 and a movable member 342, the movable member 342 is movable relative to the fixed member 341 in a guiding direction of the fixed member 341, and the movable member 342 is connected to the output member 330. The guide mechanism can adopt a guide rail slide block, a guide groove slide block, a guide rod guide sleeve and the like, and in the embodiment, the guide mechanism preferably adopts a linear sliding table and a slide block matched with the linear sliding table for use. The linear sliding table serves as a fixing part 341 of the guide mechanism, and the slider serves as the guide mechanism, so that the slider can move linearly under the constraint of the linear sliding table, and the charging connection mechanism drives the piston to move linearly accurately.

The structure of the drive correction device in this embodiment is: the plunger piston further comprises a first joint bearing 331 and a second joint bearing 332, the output part 330 is provided with a first bearing mounting hole for mounting the first joint bearing 331 and a second bearing mounting hole for mounting the second joint bearing 332, the first bearing mounting hole and the second bearing mounting hole are positioned on two sides of the plunger piston 200 in the radial direction, the plunger piston 200 is further connected with a connecting rod 333, and two opposite ends of the connecting rod 333 in the radial direction of the plunger piston 200 are respectively connected with the first joint bearing 331 and the second joint bearing 332.

The joint bearing is composed of a bearing outer ring and a bearing inner ring. The bearing cup may be mounted in the bearing mounting hole of the output member 330 in an interference fit manner. The end of the connecting rod 333 is inserted into the bearing inner race and fixed to the bearing inner race. And the inner bearing ring can rotate relative to the outer bearing ring. The present embodiment employs two joint bearings, a first joint bearing 331 and a second joint bearing 332. And the mounting positions of the two spherical plain bearings are on both sides of the plunger 200 in the radial direction, so that the line connecting the mounting positions of the two spherical plain bearings is parallel to the radial direction of the plunger 200, i.e., perpendicular to the moving direction (axial direction) of the plunger 200. Therefore, when the output part 330 drives the plunger 200 to reciprocate along the axial direction, the connecting rod can flexibly rotate relative to the output part 330 through the first joint bearing 331 and the second joint bearing 332 to adjust the relative angle and position of the plunger 200 and the output part 330, so that the plunger 200 can be automatically positioned in the transmission process, and the precision of the moving distance of the plunger 200 is effectively ensured. In order to ensure the reliability of the connection and the stability and accuracy of the transmission process, a through hole is formed at one end of the plunger 200 connected to the connecting rod, and the plunger 200 is inserted into the through hole from one side of the plunger 200 in the radial direction thereof and is penetrated out from the opposite side thereof. That is, the middle portion of the connecting rod is fixed in the through hole of the plunger 200, and both ends are connected with the first joint bearing 331 and the second bearing, respectively.

As a preferable structure of the output member 330, the output member 330 includes a driving connection plate 334, a bottom plate 335, a top plate 336 and an intermediate connection plate 337, one end of the driving connection plate 334 is drivingly connected to the ball screw 320, the other opposite end is connected to the bottom plate 335, the bottom plate 335 is connected to the moving member 342 of the guide mechanism, the first bearing installation hole is formed in the bottom plate 335, the top plate 336 is connected to the bottom plate 335 through the intermediate connection plate 337, the second bearing installation hole is formed in the top plate 336, and the bottom plate 335 and the top plate are respectively located at both sides of the plunger 200 in the radial direction. The bottom plate 335, the top plate 336 and the intermediate connecting plate 337 form a concave shape opened toward the plunger 200, and two bearing mounting holes are respectively located at upper and lower sides of the plunger 200 such that the first joint bearing 331 and the second bearing are also respectively located at upper and lower sides of the plunger 200. When the driving connecting plate 334 drives the bottom plate 335 to move, the bottom plate 335 and the top plate 336 synchronously drive the plunger 200 to make linear motion along the horizontal direction from the upper position and the lower position, and the plunger 200 adjusts the position and the angle by using the upper knuckle bearing and the lower knuckle bearing, so that the position is automatically found, the transmission error of the two positions is eliminated while the transmission stability is ensured, and the plunger 200 can accurately move a preset distance along the axial direction.

In addition, the present embodiment further includes a mounting substrate for mounting components such as the guide mechanism and the pump body 100, and the plunger 200 and the ball screw 320 are respectively located at upper and lower sides of the mounting substrate. Two strip-shaped grooves are formed in the mounting substrate, and the driving connecting plate 334 extends through the strip-shaped grooves towards the plunger 200 by a lead screw and then is connected with the bottom plate 335. The drive web 334 is movable in the strip groove when the plunger 200 is moved in its axial direction.

Example 3

As shown in fig. 1, the present embodiment is further optimized based on embodiment 2. In this embodiment, the liquid metering pump includes a plurality of pairs of the pump body 100 and the plungers 200 arranged side by side in a direction perpendicular to the guiding direction of the guiding mechanism, and a connecting rod 333, a first joint bearing 331, and a second joint bearing 332 corresponding to each plunger 200 one to one, and each plunger 200 is connected to the first joint bearing 331 and the second joint bearing 332 corresponding thereto through the connecting rod 333 corresponding thereto.

In order to improve the liquid filling efficiency while ensuring the liquid filling accuracy, the present embodiment adopts a scheme that the same driving device 300 drives a plurality of metering pumps, and each plunger 200 of the metering pump is provided with a set of first joint bearing 331 and second joint bearing 332, so that each plunger 200 can be automatically positioned in the moving process, and the influence caused by the mutual position error can be eliminated when the plurality of plungers 200 are driven by the same driving device 300, thereby ensuring the accuracy of the moving distance of the plungers 200 while improving the liquid filling efficiency.

Example 4

As shown in fig. 5, the liquid path control device 400 is optimized in this embodiment, where the liquid path control device 400 includes a two-position three-way electromagnetic valve 410, when the liquid metering pump feeds liquid, the two-position three-way electromagnetic valve 410 is switched to a state that the liquid inlet passage of the liquid metering pump is opened and the liquid outlet passage of the liquid metering pump is closed, and when the liquid metering pump column discharges liquid, the two-position three-way electromagnetic valve 410 is switched to a state that the liquid inlet passage of the liquid metering pump is closed and the liquid outlet passage of the liquid metering pump is opened. As a preferred example, the two-position three-way solenoid valve 410 may be an SMC chemical two-position three-way solenoid valve 410. The two-position three-way electromagnetic valve 410 includes three valve ports, and the three valve ports are respectively communicated with the liquid inlet head and the liquid outlet head of the liquid metering pump and the accommodating space inside the pump body 100. The communication relationship of the three valve ports can be rapidly switched through the electromagnetic action, so that liquid inlet and liquid outlet can be realized by accurately matching the moving direction of the plunger 200.

The liquid path control device 400 further includes a flow guide block 420, the flow guide block 420 is rectangular, a connection hole communicated with the accommodation space is formed on the flow guide block 420, one surface of the flow guide block 420 abuts against one surface of the two-position three-way solenoid valve 410, the flow guide block 420 includes a middle flow hole 423 formed by extending one surface of the flow guide block 420 abutting against the two-position three-way solenoid valve 410 to a position communicated with the connection hole in a direction opposite to the two-position three-way solenoid valve 410, the flow guide block 420 further includes a liquid inlet flow guide hole 424 formed by extending one surface of the flow guide block 420 abutting against the two-position three-way solenoid valve 410 to a position communicated with the liquid inlet hole 421 in a direction opposite to the two-position three-way solenoid valve 410, the flow guide block 420 includes a liquid inlet flow guide hole 424 formed by extending one surface of the flow guide block 420 abutting against the two-position three-way solenoid valve 410 to a position communicated with the liquid outlet hole 422 in a direction opposite to the two-position three-way solenoid valve 410 When the liquid metering pump feeds liquid, the orifice 423 is communicated with the liquid inlet diversion hole 424 through the two-position three-way electromagnetic valve 410, and when the liquid metering pump discharges liquid, the orifice 423 is communicated with the liquid outlet diversion hole 425 through the two-position three-way electromagnetic valve 410.

In this embodiment, the flow guiding block 420 is rectangular, the valve port of the two-position three-way electromagnetic valve 410 is tightly attached to one end surface of the flow guiding block 420, and the liquid outlet flow guiding hole 425 and the liquid inlet flow guiding hole 424 are used for guiding the liquid, and the axial directions of the liquid outlet flow guiding hole 425 and the liquid inlet flow guiding hole 424 are perpendicular to the end surface of the flow guiding block 420 tightly attached to the valve port of the two-position three-way electromagnetic valve 410, and are perpendicular to the directions of the liquid inlet hole 421 and the liquid outlet hole 422. The ports of the liquid inlet hole 421 and the liquid outlet hole 422, the liquid outlet diversion hole 425 and the liquid inlet diversion hole 424 are on different installation surfaces, so that the effective installation area of the diversion block 420 can be fully utilized, the liquid inlet head, the liquid outlet head and the two-position three-way battery valve are not easy to interfere, external liquid can quickly and accurately enter the two-position three-way electromagnetic valve 410 through the liquid inlet diversion hole 424 and then enter the pump body 100 through the middle flow hole 423, and the liquid in the pump body 100 can enter the two-position three-way electromagnetic valve 410 through the middle flow hole 423 and then is guided to the liquid outlet hole 422 through the liquid outlet diversion hole 425 so as to be discharged out of the pump body 100. The middle flow hole 423 is located in the middle, and the liquid outlet diversion hole 425 and the liquid inlet diversion hole 424 are respectively located at two sides of the middle flow hole 423, so that the liquid inlet process and the liquid outlet process of the pump body 100 are not affected with each other, and the accuracy of liquid inlet and liquid outlet is improved. In addition, the guiding block 420 further comprises a middle liquid inlet guiding hole perpendicular to and communicated with the liquid inlet hole 421 and the liquid inlet guiding hole 424, and a middle liquid outlet guiding hole perpendicular to and communicated with the liquid outlet hole 422 and the liquid outlet guiding hole 425, so that the positions of the liquid inlet head and the liquid outlet head can be flexibly selected according to installation requirements.

Example 5

The liquid metering pump of the present embodiment further includes a detecting device for generating a trigger signal and transmitting the trigger signal to the controller when it is detected that the plunger 200 moves to a predetermined position, and the controller controls the driving device 300 to stop the plunger 200 at the current position according to the received trigger signal.

Wherein a predetermined position is used to control the distance the plunger 200 is advanced, which may be determined according to the amount of liquid to be poured. The detection device can adopt a photoelectric switch 500, the photoelectric switch 500 can be installed on the installation substrate, and the signal output end of the photoelectric switch 500 is connected with the signal input end of the controller. Accordingly, the sensing probe 600 may be disposed on a component (e.g., the bottom plate 335) of the output component 330, such that the sensing probe 600 moves synchronously with the plunger 200, and when the plunger 200 moves to a designated position, the sensing probe 600 triggers the photoelectric switch 500, such that the controller cuts off the power of the driving device 300, and the plunger 200 stops at the current position. The controller can be a single chip microcomputer, an industrial personal computer, a PLC or other controllers. The user may also input the amount of priming liquid to the control via a touch screen, keyboard, mouse, or other receiving device, and the controller controls the distance the plunger 200 moves based on the amount of priming liquid input by the user. When the amount of the liquid to be poured is changed, the user may input the changed amount to the controller again. Further, the user may directly input to the controller the distance the plunger 200 moves according to the amount of liquid to be poured. The plunger 200 is controlled to move a corresponding distance according to the amount of the perfusion liquid input by the user or the distance moved by the plunger 200, and a person skilled in the art can program the controller, wherein the programming method belongs to the prior art and is not described herein.

Example 5

The present embodiment provides an electrolyte solution filling apparatus including the liquid metering pump of embodiments 1 to 4. The electrolyte filling equipment also comprises a gas-liquid separation device

Wherein the gas-liquid separation device includes:

the liquid storage container is used for storing electrolyte to be treated;

the liquid to be treated is the liquid which needs to be separated from the protective gas, wherein the liquid storage container can adopt a stainless steel liquid storage tank, and the liquid storage tank can adopt a cylindrical structure.

The separation device of the embodiment is used for firstly inputting liquid to be infused into a storage container through the liquid inlet channel. And after the separation is finished, inputting the treated liquid into a liquid metering pump through a liquid storage channel. When the liquid is separated, the liquid is connected with vacuum equipment through a vacuum channel, so that the vacuum equipment sucks gas in the storage container, and normal pressure is introduced into the liquid storage container through a normal pressure channel.

The liquid inlet channel is used for inputting the liquid to be treated into the liquid storage container;

the liquid outlet channel is used for outputting the processed electrolyte to the liquid metering pump from the liquid storage container;

the normal pressure channel is used for introducing normal pressure into the liquid storage container;

the vacuum channel is used for communicating the interior of the liquid storage container with vacuum equipment;

the first switching device is used for opening or closing the liquid inlet channel;

when the first switch device is turned on, the interior of the storage container is communicated with the pipeline for inputting the liquid to be treated, so that the liquid inlet channel is turned on.

The second switching device is used for switching on or switching off the liquid outlet channel;

when the second switch device is turned on, the interior of the storage container is communicated with the pipeline for outputting the liquid to be treated, so that the liquid outlet channel is turned on, and when the second switch device is turned off, the interior of the storage container and the pipeline for outputting the liquid to be treated are isolated by the second switch device, so that the liquid outlet channel is turned off.

The third switching device is used for opening or closing the normal-pressure channel;

when the third switch device is turned off, the inside of the storage container is separated from the pipeline for inputting the normal pressure gas by the third switch device, and the normal pressure channel is closed.

And the fourth switching device is used for opening or closing the vacuum channel.

When the fourth switching device is turned on, the inside of the storage container is communicated with the pipeline connected with the vacuum equipment, so that the vacuum channel is turned on, and when the fourth switching device is turned off, the inside of the storage container and the pipeline connected with the vacuum equipment are isolated by the fourth switching device, so that the vacuum channel is turned off.

Specifically, first switching device is the feed liquor valve, the second switching device is the play liquid valve, the third switching device is the normal pressure valve, the fourth switching device is the vacuum valve. For convenience of manual operation, the liquid inlet valve, the liquid outlet valve, the constant-pressure valve and the vacuum valve can be ball valves, and an operator can switch the on or off states of the switch devices by rotating an operating handle of the ball valves. The liquid inlet channel, the liquid outlet channel and the normal pressure channel can adopt pipelines communicated with the inside of the storage container by using the vacuum channel, and the first switching device, the second switching device, the third switching device and the fourth switching device can be respectively arranged on the corresponding pipelines.

In addition, in order to facilitate the realization of automatic control of the first switching device, the second switching device, the third switching device and the fourth switching device of the embodiment, electromagnetic valves can be adopted, a controller is added to corresponding equipment for separating gas from liquid, and the controller controls the on and off actions of the electromagnetic valves according to the flow requirements of the separation process.

As an example, the apparatus for separating gas from liquid in this embodiment further comprises a timing device, the timing device is configured to time the opening time of the fourth switching device and generate the second trigger signal when the timing reaches the preset first time threshold, and the timing device is further configured to time the opening time of the third switching device and generate the third trigger signal when the timing reaches the preset second time threshold.

The time for performing the vacuum-pumping operation and the time for introducing the atmospheric gas can be controlled according to the requirement of the separation effect in practical application. The method comprises the steps that a timing device is started when a fourth switch of a vacuum channel is controlled to be started, timing is started when a vacuum device starts to vacuumize a liquid storage container, a timer generates a trigger signal when the vacuuming time reaches the time required by the process, a controller receives the trigger signal and then controls a fourth switch device to be turned off, the vacuumizing operation is stopped, a third switch device is controlled to be started, normal pressure gas starts to be introduced into the liquid storage container, the timing device starts to time, when the normal pressure introduction time reaches the process requirement, the timer generates a trigger signal, and the controller receives the trigger signal and then controls the third switch device to be turned off. As another example, the fourth switching device and the third switching device may be turned on or off in a manual operation manner after the timer generates the trigger signal for cost saving.

In order to further improve the effect of gas separation, in this embodiment, an operation of introducing normal pressure gas after repeatedly performing vacuum pumping for multiple times may be performed, for this reason, the apparatus for separating gas from liquid of this embodiment further includes a counting device, where the counting device is configured to record the number of times that the fourth switching device is turned on and off, and send a fourth trigger signal to the controller when the number of times that the fourth switching device is turned on and off reaches a preset number threshold. During specific implementation, the controller can firstly control the fourth switching device to be started for vacuumizing operation according to process requirements, and when the set vacuumizing time is reached, the fourth switching device is controlled to be disconnected, and the counting device counts once. And then controlling the third switch device to be opened to introduce atmospheric gas into the liquid storage container, and repeating the vacuumizing operation and counting after the atmospheric gas is introduced. When the repeated operation of introducing normal pressure gas after vacuumizing reaches the set times, the counter generates a trigger signal, and the controller receives the trigger signal and then controls the second switch device to be opened, so that the processed liquid is conveyed to the next link. The controller can adopt a single chip microcomputer, an industrial personal computer, a PLC and the like.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. Liquid dosing pump, characterized in that it comprises:

the pump body is used for containing liquid to be metered;

the driving device is used for driving the plunger to move a preset distance relative to the pump body along the axial direction of the pump body according to the volume of liquid to be metered entering the pump body or discharged from the pump body as required, the driving device comprises an output part for outputting linear motion, and an accommodating space for accommodating the liquid to be metered is defined by one end of the plunger and the inner wall of the pump body;

the transmission adjusting device is in transmission connection with the plunger and is used for adjusting the relative position and/or angle of the output part of the driving device and the plunger in the process that the driving device drives the plunger to move along the axial direction of the pump body;

2. The liquid metering pump of claim 1, wherein one end of the plunger is drivingly connected to the driving device, and the other opposite end is inserted into the pump body, and when the plunger moves in a direction away from the pump body, the liquid path control device cuts off the liquid outlet path of the pump body and communicates with the liquid inlet path of the pump body so that the liquid to be metered enters the liquid metering pump through the liquid inlet path, and when the plunger moves in a direction close to the pump body, the liquid path control device cuts off the liquid inlet path of the pump body and communicates with the liquid outlet path of the pump body so that the liquid to be metered exits the liquid metering pump through the liquid outlet path.

3. The liquid metering pump of claim 1, wherein the driving device further comprises a motor and a ball screw, and the motor is used for driving the ball screw to drive the plunger to perform reciprocating linear motion relative to the pump body through the output component.

4. The liquid metering pump of claim 3, wherein the transmission adjusting device comprises a first joint bearing, a second joint bearing and a connecting rod, the output member is formed with a first bearing mounting hole for mounting the first joint bearing and a second bearing mounting hole for mounting the second joint bearing, the first bearing mounting hole and the second bearing mounting hole are located on both sides of the plunger in the radial direction, opposite ends of the connecting rod in the radial direction of the plunger are respectively connected with the first joint bearing and the second joint bearing, and the middle of the connecting rod is connected with the plunger.

5. The liquid metering pump of claim 4, further comprising a guide mechanism, wherein the guide mechanism comprises a fixed member and a movable member, the movable member is movable relative to the fixed member along a guide direction of the fixed member, the movable member is connected to the drive connection mechanism, the liquid metering pump comprises a plurality of pairs of pump bodies and plungers arranged side by side along a direction perpendicular to the guide direction of the guide mechanism, and a connection rod, a first knuckle bearing and a second knuckle bearing corresponding to each plunger one-to-one, and each plunger is connected to the first knuckle bearing and the second knuckle bearing corresponding thereto through the connection rod corresponding thereto.

6. The liquid metering pump of claim 5, wherein the output member comprises a driving connection plate, a bottom plate, a top plate and an intermediate connection plate, one end of the driving connection plate is drivingly connected to the ball screw, the other opposite end is connected to the bottom plate, the bottom plate is connected to the moving member of the guide mechanism, the first bearing mounting hole is formed in the bottom plate, the top plate is connected to the bottom plate through the intermediate connection plate, the second bearing mounting hole is formed in the top plate, and the bottom plate and the top plate are respectively located on both sides of the plunger in the radial direction.

7. The liquid metering pump according to any one of claims 1 to 6, wherein the liquid path control device comprises a two-position three-way electromagnetic valve, when the liquid metering pump feeds liquid, the two-position three-way electromagnetic valve is switched to a state in which a liquid feeding path of the liquid metering pump is opened and a liquid discharging path of the liquid metering pump is closed, and when the liquid metering pump column discharges liquid, the two-position three-way electromagnetic valve is switched to a state in which the liquid feeding path of the liquid metering pump is closed and the liquid discharging path of the liquid metering pump is opened.

8. The liquid metering pump of claim 7, wherein the liquid path control device further comprises a flow guide block, the flow guide block is rectangular, a connection hole communicated with the accommodation space is formed in the flow guide block, one surface of the flow guide block abuts against one surface of the two-position three-way solenoid valve, the flow guide block comprises a middle flow hole formed by extending one surface of the flow guide block abutting against the two-position three-way solenoid valve to a position communicated with the connection hole in a direction opposite to the two-position three-way solenoid valve, the flow guide block further comprises a liquid inlet hole formed by extending one surface of the flow guide block abutting against the two-position three-way solenoid valve to a position communicated with the liquid inlet hole in a direction opposite to the two-position three-way solenoid valve, and the flow guide block comprises a liquid inlet hole formed by extending one surface of the flow guide block abutting against the two-position three-way solenoid valve to a position communicated with the liquid outlet hole in a direction opposite to the two-position three-way solenoid valve And the middle flow hole is communicated with the liquid outlet diversion hole through a two-position three-way electromagnetic valve when the liquid metering pump feeds liquid.

9. The liquid metering pump according to any one of claims 1 to 6, further comprising a detecting device for generating a trigger signal and sending the trigger signal to the controller when the movement of the plunger to the predetermined position is detected, and a controller for controlling the driving device to stop the plunger at the current position in accordance with the received trigger signal.

10. Lithium battery electrolyte perfusion apparatus, characterized in that it comprises a liquid metering pump according to any one of claims 1 to 9.