CN218350310U - Multichannel liquid feeding device - Google Patents

Abstract

The utility model belongs to the technical field of liquid processing, a multichannel liquid feeding device is disclosed, include: the driving component comprises a driving piece and a transmission mechanism, the driving piece is connected with the input end of the transmission mechanism, the transmission mechanism is provided with at least two output ends, and each output end can output rotary motion; the screw rod assemblies comprise screw rods, nut blocks and nut mounting seats, the screw rods are in one-to-one corresponding transmission connection with the output ends, the nut blocks are connected to the corresponding screw rods, the nut mounting seats are connected with the nut blocks, and each nut block can perform independent reciprocating motion along the corresponding screw rod; and at least two groups of liquid adding needles are connected to the nut mounting seat in a one-to-one correspondence manner and can move along with the nut mounting seat. The utility model discloses a carry out the purpose of independent up-and-down motion through a plurality of liquid feeding needles of driving piece drive for the device can fast switch over the liquid feeding passageway, has reduced the use quantity of driving piece moreover, has reduced use cost.

Description

Multichannel liquid feeding device

Technical Field

The utility model relates to a liquid processing technology field especially relates to a multichannel liquid feeding device.

Background

Since many components which interfere with the measurement exist in the sample to be measured, it is necessary to extract the component to be measured by physical, chemical, or the like, thereby eliminating the influence of the interfering component. At present, liquid is added into a sample to be detected or a test solution through liquid adding, and the method becomes a common treatment mode for detecting the sample.

At present, in the processing procedure before the ization, through using manual liquid-transfering gun, carry out the liquid feeding processing to the sample cell, but when the sample cell need increase the solution more than two kinds, need use a plurality of liquid-transfering guns and change liquid-transfering gun rifle head, have the problem that manual operation is inefficient, and when having big batch sample to handle, need additionally increase operating personnel, increased the cost of labor. In order to solve the problem, the prior art provides an automatic pipetting device using multiple channels, which solves the problem that a single sample tube needs to be added with multiple solutions, but each channel in the device needs to be driven by an independent motor, so that the use number of the motors is increased, and the purchase cost of the device is high.

Based on the above situation, a multi-channel liquid feeding device is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multichannel liquid feeding device, the device can drive a plurality of liquid feeding needles through the drive of a driving piece and carry out independent up-and-down motion, has realized the fast switch over of liquid feeding passageway, and has reduced the use quantity of driving piece, has reduced use cost.

To achieve the purpose, the utility model adopts the following technical proposal:

a multi-channel liquid adding device comprising:

the driving assembly comprises a driving piece and a transmission mechanism, the driving piece is in transmission connection with an input end of the transmission mechanism, the transmission mechanism is provided with at least two output ends, and each output end can output rotary motion;

the screw rod assemblies are in one-to-one corresponding transmission connection with the output ends, the nut blocks are in threaded connection with the corresponding screw rods and form screw rod nut pairs, the nut mounting seats are fixedly connected with the corresponding nut blocks, and each nut block can perform independent reciprocating motion along the corresponding screw rod;

and each group of liquid adding needles is connected to the nut mounting seat in a one-to-one correspondence manner and can move along with the nut mounting seat.

Optionally, each of the output ends is capable of outputting a rotary motion with the same direction, and at least some of the screw threads on the screw rods have different directions.

Optionally, at least two of the output ends can output rotary motion in different directions, and the thread structures on at least two of the screw rods have the same rotation direction.

Optionally, the transmission mechanism includes a driving wheel, a synchronous belt and at least two driven wheels, the driving wheel is in transmission connection with the driving element, and the driving wheel is in transmission connection with the driven wheels through the synchronous belt.

Optionally, the multichannel liquid adding device further includes a first mounting seat, a slide rail and a slide block, the first mounting seat is provided with at least two first through holes, the lead screws penetrate through the first through holes in a one-to-one correspondence manner and are connected with the corresponding driven wheels, the slide rail is fixedly connected to the first mounting seat, and the slide block is slidably disposed on the slide rail and is fixedly connected with the nut block.

Optionally, the slide rail has a plurality of mounting holes arranged at intervals in the vertical direction, and the connecting piece selectively passes through one of the mounting holes to be connected with the first mounting seat.

Optionally, the multichannel liquid adding device further comprises a second mounting base, the second mounting base is fixedly connected with the slide rail, and the second mounting base is provided with a second through hole for the screw rod to pass through.

Optionally, the nut mounting seat comprises a mounting seat shell and an insertion block which are fixedly connected, the mounting seat shell is fixedly connected with the nut block, an access through hole is formed in the insertion block, and the liquid feeding needle can be vertically inserted into the access through hole.

Optionally, the insertion block includes a first clamping block and a second clamping block, the first clamping block is fixedly connected to the nut mounting seat, the second clamping block is detachably connected to the first clamping block, half-open slots are formed in the first clamping block and the second clamping block, and the two half-open slots are matched to form the insertion through hole.

Optionally, the driving assembly further includes a magnetic programming controller, and the magnetic programming controller is fixedly connected to the driving member and configured to determine a rotation position of the driving member.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a multichannel liquid adding device, which comprises a driving component, at least two screw rod components and at least two groups of liquid adding needles, wherein the driving component comprises a driving piece and a transmission mechanism with at least two output ends, so that the transmission mechanism can drive the screw rod components to move under the driving action of the driving piece; each screw rod assembly comprises a screw rod, a nut block and a nut mounting seat, the screw rod is in transmission connection with the output end, the nut block is in threaded connection with the screw rod and is fixedly connected with the nut mounting seat, so that the screw rod can enable the corresponding nut block and the nut mounting seat to independently move up and down along the screw rod; the liquid adding needle is fixedly connected to the nut mounting seat and can move along with the nut mounting seat, so that one part of the liquid adding needle ascends while the other part of the liquid adding needle descends synchronously. The device achieves the purpose of driving the plurality of liquid adding needles to independently move up and down through one driving piece, so that the device can rapidly switch liquid adding channels; and the number of driving pieces is reduced, and the use cost is reduced.

Drawings

FIG. 1 is an assembly view of the multi-channel liquid adding device provided by the present invention;

fig. 2 is a schematic structural diagram of the nut mounting seat provided by the present invention.

In the figure:

1. a drive assembly; 11. a drive member; 12. a transmission mechanism; 121. a driving wheel; 122. a synchronous belt; 123. a driven wheel; 13. a magnetic programming controller; 2. a screw assembly; 21. a screw rod; 22. a nut block; 23. a nut mounting seat; 231. a mount housing; 232. an insertion block; 2321. a first clamping block; 2322. a second clamp block; 3. a liquid adding needle; 4. a first mounting seat; 5. a slide rail; 6. a slider; 7. a second mounting seat.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and can include, for example, fixed or removable connections, mechanical or electrical connections, direct connections, indirect connections through an intermediary, communication between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not in direct contact, but with another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

At present, multichannel liquid application of sample device among the prior art uses a plurality of independent motors to drive its passageway of place usually, drives the liquid feeding needle of a plurality of passageways and carries out the liquid feeding and handle to satisfy the demand that single sample cell need add multiple solution. However, the existing multi-channel liquid sample adding device has a large number of driving parts, so that the use cost of the device is high. Therefore, design one kind just can drive through single driving piece and carry out independent up-and-down motion to the liquid feeding needle of a plurality of passageways, and then realize the quick switch-over of liquid feeding passageway, and reduced use cost's multichannel liquid feeding device, become a future development trend.

As shown in fig. 1 to 2, the multi-channel liquid adding device of the present embodiment includes a driving assembly 1, two screw assemblies 2 and two liquid adding needles 3. Wherein, drive assembly 1 includes driving piece 11 and drive mechanism 12, and driving piece 11 is connected with the input transmission of drive mechanism 12, and drive mechanism 12 has two outputs, and each output homoenergetic exports rotary motion to can drive a plurality of outputs through driving piece 11 and rotate. Each lead screw assembly 2 comprises a lead screw 21, a nut block 22 and a nut mounting seat 23, the two lead screws 21 are in one-to-one corresponding transmission connection with the two output ends, the nut blocks 22 are in threaded connection with the lead screws 21, the nut mounting seats 23 are fixedly connected with the corresponding nut blocks 22, and each nut block can perform independent reciprocating motion along the corresponding lead screw. And a group of liquid adding needles 3 are respectively and fixedly installed on the two nut installation seats 23, so that one group of liquid adding needles 3 can ascend and the other group of liquid adding needles can descend under the driving of the driving piece 11, and the liquid adding channels can be rapidly switched. In addition, the liquid feeding channel switching process of the multi-channel liquid feeding device is completed under the driving action of the same driving part 11, so that the using number of the driving parts 11 is reduced, and the using cost is effectively reduced.

It should be noted that, in the present embodiment, a screw rod assembly 2 is used as a liquid feeding channel, and the liquid feeding channel appearing hereinafter is referred to as the screw rod assembly 2. Moreover, in this embodiment, the liquid feeding channel and the liquid feeding needle 3 are both arranged vertically, so as to meet the liquid feeding requirement of the device in the vertical direction, and of course, in some other embodiments, the liquid feeding channel and/or the liquid feeding needle 3 may be arranged in a corresponding horizontal or inclined state according to the actual posture of the liquid feeding object.

It can be understood that the number of the output ends and the screw rod assemblies 2 can be two or more, and one liquid adding needle 3 can be installed on each group of screw rod assemblies 2, and two or more liquid adding needles 3 can also be installed, so that the requirement of the device on the structural design of the device under the condition of large liquid adding scale can be met.

In this embodiment the drive member 11 is an electric motor, which provides a relatively large power to the transmission mechanism 12, providing the device with the ability to power a plurality of priming channels. Of course, in some other embodiments, the driving member 11 may also be an internal combustion engine, a cylinder, an electric motor, etc., and the invention is not limited to the kind of the driving member 11.

Optionally, the driving assembly 1 further includes a magnetic encoding controller 13 as shown in fig. 1, the magnetic encoding controller 13 is fixedly installed at the bottom of the driving member 11, and includes a battery cell and a terminal plug, after the terminal plug is connected to the power supply, the magnetic encoding controller 13 can determine a rotation position of the driving member 11 through the battery cell, and when the driving member 11 rotates to a preset position, the driving member 11 is controlled by the battery cell to rotate in a reverse direction, so as to drive the transmission mechanism 12 to rotate in a reciprocating manner, so that the two liquid feeding needles 3 on the device can move up and down repeatedly, and a task of rapidly switching the liquid feeding channel is completed.

Optionally, and with continued reference to fig. 1, the transmission 12 includes a drive pulley 121, a timing belt 122, and at least two driven pulleys 123. The driving wheel 121 is in transmission connection with the driving part 11 as the input end of the transmission mechanism 12, the driving wheel 121 is in transmission connection with the driven wheel 123 as the output end of the transmission mechanism 12 through the synchronous belt 122, and when the driving part 11 starts to rotate, at least two driven wheels 123 can be driven to rotate through the transmission effect of the driving wheel 121 and the synchronous belt 122.

Further, in this embodiment, two driven wheels 123 with the same rotation direction are provided, so that the same rotation motion in the rotation direction is output, correspondingly, one of the two screw rods connected with the driven wheels is a left-handed screw rod, and the other is a right-handed screw rod, so that when the driving wheel 121 rotates, each driven wheel 123 can rotate in one direction, so that the rotation direction of one part of the screw rods 21 is different from the rotation direction of the other part of the screw rods 21, so that the movement directions of the nut blocks 22 on the device are different, and therefore, when one group of liquid adding needles 3 synchronously rises, the other group of liquid adding needles 3 synchronously falls, so that the device can rapidly complete the switching of the liquid adding channels.

In another embodiment, the driving wheel 121 and one of the driven wheels 123 are in transmission connection by a cross-state synchronous belt 122, so that the effect of driving the two driven wheels 123 to output different rotation motions by one driving wheel is achieved, and accordingly, the rotation directions of the thread structures on the two lead screws 21 are the same, so that when the driving wheel 121 rotates rotationally, the rotation directions of the two driven wheels 123 are different, and the rotation directions of the lead screws 21 opposite to the two driven wheels 123 are also opposite. Therefore, the arrangement can also cause the movement directions of the two nut blocks 22 on the device to be different, and the purpose that one group of liquid adding needles 3 synchronously ascend and the other group of liquid adding needles 3 synchronously descend at the same time is achieved, so that the device can rapidly switch liquid adding channels.

Of course, it should be noted that the utility model discloses in also can carry out the transmission with more than two from driving wheel 123 and action wheel 121 through hold-in range 122 and be connected for these follow driving wheel 123 homoenergetic rotate along with action wheel 121, thereby make the synchronous ascending time of part group liquid feeding needle, the synchronous decline of another part group liquid feeding needle, and then accomplish the purpose of the fast switch-over of liquid feeding passageway.

In some other embodiments, the transmission mechanism 12 may also be a gear transmission mechanism 12 commonly known in the prior art, and a driving gear is meshed with at least two driven gears to realize transmission motion, so that the synchronous belt 122 used in this embodiment is eliminated, and the use cost is saved; the transmission mechanism 12 can also be a chain transmission mechanism, the synchronous belt 122 is replaced by a chain, and the chain transmission function is added between gears, so that the working is reliable, and the transmission efficiency is improved. The selection of the transmission 12 can thus be made by a person skilled in the art according to the actual requirements.

With continued reference to fig. 1, in the present embodiment, one end of the lead screw 21 is inserted into the through hole of the driven wheel 123, so that the lead screw 21 can generate a rotational motion with the rotation of the driven wheel 123; a screw rod 21 is in threaded connection with a nut block 22, a nut mounting seat 23 and a liquid adding needle 3, so that the device can complete the liquid adding process of a liquid adding pipe. It should be noted that, in some other embodiments, a plurality of nut blocks 22, nut mounts 23 and liquid feeding needles 3 arranged up and down may be further connected to one screw rod 21 in a threaded manner, and when the screw rod 21 performs a rotational movement, the plurality of liquid feeding needles 3 located thereon can simultaneously perform an upward or downward movement, so that the apparatus can complete a liquid feeding process of a plurality of rows of liquid feeding tubes arranged in parallel.

Alternatively, as shown in fig. 2, the nut mounting seat 23 includes a mounting seat housing 231 and an insertion block 232, and the mounting seat housing 231 is fixedly connected with the nut block 22 and can move up and down along the lead screw 21 along with the nut block 22. The plug-in block 232 sets up in one side of mount pad shell 231, can move together with mount pad shell 231, has seted up the access through-hole along the direction of lead screw 21 motion on the plug-in block 232, and in the liquid feeding needle 3 can insert this access through-hole to make liquid feeding needle 3 can reciprocate along with the rotation of lead screw 21.

Furthermore, a U-shaped groove is formed in the mounting seat housing 231, and the mounting seat housing 231 is fixedly connected to the nut block 22 through a bolt at the position of the opening of the U-shaped groove. By means of the mount housing 231, the nut block 22 is effectively restricted from rotational movement following the lead screw 21, so that the nut block 22 can move up and down along the lead screw 21.

Further, after the nut block 22 and the mounting seat housing 231 are fixedly connected, a channel is formed at the U-shaped groove for the sliding block 6 and the sliding rail 5 to pass through, which will be described in detail in the context of the sliding rail 5.

Continuing to refer to fig. 2, in this embodiment, the insertion block 232 includes a first clamping block 2321 and a second clamping block 2322, wherein the first clamping block 2321 is fixedly disposed on the side of the mounting seat shell 231 that is away from the opening direction of the groove, and the second clamping block 2322 is detachably connected to the first clamping block 2321, so that the liquid feeding needle 3 is fixedly connected to the mounting seat shell 231 through clamping of the two clamping blocks, and the liquid feeding needle 3 is easy to mount and replace, thereby improving flexibility of the multi-channel liquid feeding device. It can be understood that the second clamping block 2322 and the first clamping block 2321 may be fixedly connected by a bolt, or may be connected by other detachable connection methods such as a screw connection, and those skilled in the art may select different connection methods according to actual working condition requirements, which is not limited by the present invention.

Further, half open slots have all been seted up on first clamp splice 2321 and the second clamp splice 2322, and two half open slots cooperate and form above-mentioned access through-hole, supply inserting and dress of liquid feeding needle 3 to hold, so that the clamping face of two clamp splices carries out in close contact with liquid feeding needle 3, thereby improved first clamp splice 2321 and second clamp splice 2322 and carried out the fixed effect of centre gripping to liquid feeding needle 3, improved this multichannel liquid feeding device's stability.

It should be noted in advance that the cross-sectional shape of the half-open groove formed in the present embodiment is an arc shape, so as to firmly clamp the liquid adding needle 3 having a cylindrical shape; of course, when the filling needle 3 having a step or a rectangular shape is used, the sectional shape of the half-open groove in the present embodiment may also be a step shape or a rectangular shape, so as to satisfy the tight clamping requirements for the surface shapes of different filling needles 3, and therefore, the present invention does not limit the sectional shape of the half-open groove.

Optionally, the multichannel liquid adding device further comprises a first mounting seat 4, a sliding rail 5 and a sliding block 6. The first mounting seat 4 is disposed between the driving wheel 121 and the driving member 11 as shown in fig. 1, and is provided with at least two first through holes (not shown), so that the lead screws 21 can correspondingly penetrate through the first through holes and be connected to the driven wheels 123. The slide rail 5 and the screw rod 21 are also vertically arranged, and the slide rail 5 is fixedly connected to the first mounting seat 4, so that the slide rail 5 is prevented from moving. The slide rail 5 is further provided with a slide block 6 capable of sliding along the slide rail 5, and the slide block 6 is fixedly connected with the nut block 22, so that the nut block 22 and the nut mounting seat 23 can move up and down along the slide rail 5 under the action of the rotation motion of the screw rod 21. Through the arrangement, the nut mounting seat 23 and the nut block 22 can keep stable linear motion under the condition that the screw rod 21 rotates, so that the problem that the nut mounting seat 23 and the nut block 22 rotate along with the screw rod 21 is solved, the screw rod 21 is protected, the liquid adding needle 3 can stably move up and down, and the risk that liquid adding fails due to rotation is avoided.

Furtherly, set up two at least first inserting grooves on the lateral wall of first mount pad 4 for slide rail 5 can the joint in this first inserting groove one-to-one, thereby strengthened the joint strength between slide rail 5 and the first mount pad 4 two, improved whole device's stability.

In the embodiment, the slide rail 5 can penetrate through the channel in the nut mounting seat 23 and is fixedly connected with the first mounting seat 4, so that the overall structure of the multichannel liquid receiving device is more compact, and the utilization space of the device is reduced.

The slider 6 that sets up on slide rail 5 also wears to locate in the passageway of nut mount pad 23 equally, and the both sides of slider 6 pass through screw or bolt and nut mount pad 23 fixed connection to make nut mount pad 23 can carry out rectilinear movement along slide rail 5 along with slider 6, avoided nut mount pad 23 to have around the pivoted problem of lead screw 21.

Optionally, in this embodiment, the multi-channel liquid adding device further includes a second mounting seat 7 as shown in fig. 1, the second mounting seat 7 is located at an end of the screw rod 21 that is not connected to the driven wheel 123 and is fixedly connected to the slide rail 5, and a plurality of second through holes are formed in the second mounting seat 7, so that the screw rod 21 can pass through the second through holes in a one-to-one correspondence manner. Through the second mounting seat 7, the sliding rail 5 and the screw rod 21 can be further limited and fixed, the effect of supporting the sliding rail 5 and the screw rod 21 is achieved, and the stability and the reliability of the multi-channel liquid adding device are improved.

Furtherly, seted up two at least second inserting grooves on second mount pad 7 for slide rail 5 can the joint in this second inserting groove with 4 fixed connection's of first mount pad one end, thereby has strengthened the joint strength between slide rail 5 and the 4 two of first mount pad, has improved the stability of whole device.

Optionally, as shown in fig. 1, the slide rail 5 is provided with a plurality of mounting holes arranged at intervals in the height direction, and the bolt can penetrate through one of the mounting holes to fix the slide rail 5 clamped on the first mounting seat 4 and/or the second mounting seat 7, so that the stability of the whole device is further improved, and the slide rail 5 is convenient to detach and replace.

It will be appreciated that in some other embodiments, a screw may be used to threadably connect to first mount 4 and/or second mount 7 through one of the mounting holes. Of course, other types of connecting pieces can be used to fix the slide rail, and those skilled in the art can select different connecting pieces according to actual working condition requirements.

Illustratively, when the driving member 11 starts to rotate, the driving wheel 121 is driven to rotate synchronously, and then the two driven wheels 123 rotate along with the driving wheel 121 in the same direction through the transmission action of the synchronous belt 122; then the two driven wheels 123 respectively drive the screw rods 21 connected with the driven wheels to rotate in the same direction, and the thread structures arranged on the two screw rods 21 have different rotation directions, so that the two screw rods 21 can enable the nut blocks 22 and the nut mounting seats 23 respectively connected with the screw rods 21 to independently move up and down; then, two groups of liquid adding needles 3 fixedly mounted with the two nut mounting seats 23 can also move independently from top to bottom along with the nut mounting seats 23, so that after one liquid adding needle 3 of one sample tube is added with one solution, the sample tube can be immediately moved to the other liquid adding needle 3 to complete the liquid adding process of the other solution, the quick switching of a liquid adding channel is realized, and the situation that the two liquid adding needles 3 descend or ascend simultaneously to cause interference with each other to add liquid is prevented.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A multichannel liquid feeding device, its characterized in that includes:

the driving assembly (1) comprises a driving piece (11) and a transmission mechanism (12), the driving piece (11) is in transmission connection with an input end of the transmission mechanism (12), the transmission mechanism (12) is provided with at least two output ends, and each output end can output rotary motion;

the screw rod assembly comprises at least two screw rod assemblies (2), each screw rod assembly (2) comprises a screw rod (21), a nut block (22) and a nut mounting seat (23), the screw rods (21) are in one-to-one corresponding transmission connection with the output ends, the nut blocks (22) are in threaded connection with the corresponding screw rods (21) to form a screw rod-nut pair, the nut mounting seats (23) are fixedly connected with the corresponding nut blocks (22), and the nut blocks (22) can perform independent reciprocating motion along the corresponding screw rods;

the liquid adding device comprises at least two groups of liquid adding needles (3), wherein each group of liquid adding needles (3) are connected to the nut mounting seat (23) in a one-to-one correspondence mode and can move along with the nut mounting seat (23).

2. The multi-channel liquid adding device of claim 1, wherein each output end can output the same rotation movement in the same direction, and the screw threads on at least part of the screw rods (21) have different directions of rotation.

3. The multichannel liquid adding device as claimed in claim 1, characterized in that at least two of the outputs are capable of outputting rotary motions that are different in direction of rotation, and the screw structures on at least two of the screws (21) have the same direction of rotation.

4. The multichannel liquid adding device as claimed in claim 2 or 3, wherein the transmission mechanism (12) comprises a driving wheel (121), a synchronous belt (122) and at least two driven wheels (123), the driving wheel (121) is in transmission connection with the driving member (11), and the driving wheel (121) is in transmission connection with the driven wheels (123) through the synchronous belt (122).

5. The multichannel liquid adding device according to claim 4, characterized in that the multichannel liquid adding device further comprises a first mounting seat (4), a slide rail (5) and a slide block (6), wherein at least two first through holes are formed in the first mounting seat (4), the screw rods (21) correspondingly penetrate through the first through holes one by one to be connected with the corresponding driven wheels (123), the slide rail (5) is fixedly connected with the first mounting seat (4), and the slide block (6) is slidably arranged on the slide rail (5) and fixedly connected with the nut block (22).

6. The multichannel liquid adding device as claimed in claim 5, characterized in that the slide rail (5) has a plurality of mounting holes arranged at intervals in the vertical direction, and a connecting piece is selectively connected with the first mounting seat (4) through one of the mounting holes.

7. The multichannel liquid feeding device as claimed in claim 6, further comprising a second mounting seat (7), wherein the second mounting seat (7) is fixedly connected with the slide rail (5), and the second mounting seat (7) is provided with a second through hole for the screw rod (21) to pass through.

8. The multichannel liquid feeding device as claimed in claim 1, wherein the nut mounting seat (23) comprises a mounting seat housing (231) and an insertion block (232) which are fixedly connected, the mounting seat housing (231) is fixedly connected with the nut block (22), the insertion block (232) is provided with an access through hole, and the liquid feeding needle (3) can be vertically inserted into the access through hole.

9. The multichannel liquid adding device as claimed in claim 8, wherein the insertion block (232) includes a first clamping block (2321) and a second clamping block (2322), the first clamping block (2321) is fixedly connected with the nut mounting seat (23), the second clamping block (2322) is detachably connected with the first clamping block (2321), the first clamping block (2321) and the second clamping block (2322) are both provided with a half-open slot, and the two half-open slots are matched to form the access through hole.

10. The device according to claim 1, wherein the drive assembly (1) further comprises a magnetic controller (13), the magnetic controller (13) is fixedly connected to the driving member (11) and configured to determine a rotational position of the driving member (11).

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