CN211205886U

CN211205886U - Pipetting device

Info

Publication number: CN211205886U
Application number: CN201921953654.0U
Authority: CN
Inventors: 韩奎亮; 周史良; 李广浩; 赵飞
Original assignee: Beijing Meilian Taike Biotechnology Co ltd
Current assignee: Beijing Meilian Taike Biotechnology Co ltd
Priority date: 2019-11-09
Filing date: 2019-11-09
Publication date: 2020-08-07
Anticipated expiration: 2029-11-09

Abstract

The utility model relates to a liquid transfer device, including door-shaped support body, be provided with the drive mechanism who bears the weight of the device of liquid feeding pump and can drive and bear the weight of the device and reciprocate in the support body, a inhale notes liquid mechanism for liquid feeding pump imbibition or notes liquid, bear the device including the loading board that has the holding tank, set up the liquid feeding pump in the holding tank, loading board front side fixed connection dustcoat, drive mechanism includes the first layer board of being connected with the loading board, first motor is established to the support body upper end, first motor is connected with first screw nut on the first layer board through first lead screw, first layer board is equipped with the first guiding mechanism that guides its reciprocating, inhale notes liquid mechanism includes the second layer board, first layer board is equipped with the second motor, the second motor passes through the second lead screw nut on second layer board and is connected, be equipped with its second guiding mechanism that guides its reciprocating on the second layer board, second layer board front side is equipped with the joint portion that is used for the handle that pushes away of joint liquid feeding pump, first motor and second.

Description

Pipetting device

Technical Field

The utility model belongs to the technical field of the medical equipment technique and specifically relates to a move liquid device is related to.

Background

The liquid-transfering device is widely used in biochemical research laboratories, hospitals and pharmaceutical companies, can be used for sample processing operations such as sample pretreatment, sample purification and amplification, sample dilution and concentration, sample preparation and the like, and generally comprises a liquid-transfering sleeve, a piston rod, a plug nozzle and the like. When liquid is sucked, the liquid is sucked into the pump cavity under the action of negative pressure in the pipetting sleeve along with the pulling of the piston rod in the pipetting sleeve; in the same way, the liquid with the same volume as the space through which the piston rod moves can be pushed out by pushing the piston rod.

Traditional liquid-transfering device is based on the syringe pump principle and generally includes and moves liquid the sleeve, moves liquid and sets up the piston rod in the sleeve, moves liquid through the mode of manual push-and-pull piston rod, and this working method work efficiency is low, imbibition, annotate the liquid precision low.

Along with the progress of science and technology, current liquid-transfering device is usually for a plurality of piston rods under a drive mechanism's drive, respectively simultaneously in a plurality of liquid-transfering sleeve reciprocating motion, a plurality of liquid-transfering channels carry out imbibition and annotate the liquid operation simultaneously. Debugging is loaded down with trivial details among the liquid transfer device to the liquid feeding pump assembling process, and it wastes time and energy to maintain, and at a plurality of liquid-moving passageway simultaneous workings, the piston rod with move liquid sleeve cooperation that can not be better, easily appear many to the piston rod with move liquid sleeve during operation inconsistent and the piston rod with move liquid between the sleeve card pause phenomenon, influence filling precision and accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a move liquid device, the pump rod cooperation precision of liquid feeding pump and liquid feeding pump is good among the device, the axiality is high, the imbibition of liquid feeding pump, annotate the liquid precision height, operate steadily and do not have the vibration, and liquid feeding pump displacement is accurate, and degree of automation is high.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a liquid transfer device comprises a door-shaped frame body, wherein a bearing device for bearing a liquid transfer pump and a driving mechanism capable of driving the bearing device to move up and down are arranged in the frame body, and a liquid suction and injection mechanism for sucking or injecting liquid by the liquid transfer pump is used;

the bearing device comprises a bearing plate horizontally arranged in a frame body, a plurality of vertical containing grooves with front openings are formed in the front side of the bearing plate, a liquid adding pump is embedded in each containing groove, a supporting piece is arranged at the upper end of a liquid adding pipe of the liquid adding pump, an elastic piece is sleeved on the liquid adding pump between the supporting piece and the bearing plate, the front side of the bearing plate is fixedly connected with an outer cover, the outer cover comprises a vertical cover plate fixedly connected with the bearing plate and a supporting piece at the lower end of the vertical cover plate, the supporting piece is perpendicular to the cover plate and extends towards the direction of the liquid adding pump, an inserting hole corresponding to the liquid adding pipe of the liquid adding pump is formed in the supporting piece, the liquid adding pipe of the liquid adding pump penetrates through the inserting hole;

the driving mechanism comprises a horizontal first supporting plate fixedly connected with the rear side of the bearing plate, a horizontal supporting plate fixed on two vertical side walls of the frame body is arranged below the first supporting plate, the upper end of the frame body is fixedly connected with a vertically arranged first motor, the output end of the first motor is connected with a vertical first lead screw, the first supporting plate is fixedly connected with a first lead screw nut matched with the first lead screw, and the first supporting plate is also provided with a first guiding mechanism for guiding the first supporting plate to move up and down;

the liquid sucking and injecting mechanism comprises a second supporting plate arranged above the first supporting plate, a motor frame is arranged on the rear side of the first supporting plate, a vertical second motor is fixedly arranged at the upper end of the motor frame, the output end of the second motor is connected with a vertical second lead screw, a second lead screw nut matched with the second lead screw is fixedly connected onto the second supporting plate, a second guide mechanism for guiding the second supporting plate to move up and down is further arranged on the second supporting plate, and a clamping part used for clamping a push handle of a liquid adding pump is arranged on the front side of the second supporting plate;

the first motor and the second motor are connected with a P L C which coordinates the movement of the two motors.

Through adopting above-mentioned technical scheme, first motor can drive first layer board, loading board, liquid feeding pump, dustcoat and second layer board through first lead screw and do the up-and-down motion together. When the first motor rotates forwards to drive the first supporting plate and the second supporting plate to move downwards simultaneously, the liquid adding pump moves to the lower part, a liquid adding pipe of the liquid adding pump is located in a reagent liquid sucking area, then the second motor drives the second supporting plate to move upwards through a second lead screw, a clamping part on the second supporting plate drives a pushing handle of the liquid adding pump to move upwards, the pushing handle drives a pump rod of the liquid adding pump to move upwards, the liquid adding pump generates negative pressure, and therefore the liquid adding pump can suck liquid; the first motor rotates reversely to drive the liquid adding pump to move upwards again to reserve a moving channel for the reagent kit, the reagent liquid injection area moves to the position below a liquid adding pipe of the liquid adding pump, the first motor rotates clockwise once more to drive the first supporting plate and the second supporting plate to move downwards simultaneously, the first motor rotates clockwise once more to drive the liquid adding pump to move downwards, the liquid adding pipe of the liquid adding pump is located in the reagent liquid injection area, then the second motor drives the second supporting plate to move downwards through the second lead screw, the push handle of the liquid adding pump loses lifting of the clamping portion of the second supporting plate, and a pump rod of the liquid adding pump injects a test solution in the liquid adding pump into the reagent liquid injection area under the action of an elastic piece in the liquid adding pump. The process is repeated to move, so that the liquid absorption or injection of the test solution is carried out, and the liquid removal work is finished.

The utility model discloses further set up to: the first guide mechanism comprises first sliding holes respectively formed in first supporting plates on two sides of a first lead screw, vertical first sliding rods are sleeved in each first sliding hole, and two ends of each first sliding rod are fixedly connected with the upper end of the frame body and the supporting plate respectively; the second guide mechanism comprises second support plates on two sides of the second lead screw, second sliding holes are formed in the second support plates respectively, vertical second sliding rods are sleeved in the second sliding holes respectively, and two ends of each second sliding rod are fixedly connected with the upper end of the frame body and the support plate respectively.

By adopting the technical scheme, the first sliding rod slides in the first sliding hole, so that the up-and-down running stability of the first supporting plate is ensured; the second sliding rod slides in the second sliding hole, so that the up-and-down running stability of the second supporting plate is ensured.

The utility model discloses further set up to: a coaxial first sliding sleeve is fixedly arranged on the first sliding hole, and the first sliding sleeve is connected with the first sliding rod in a sliding manner; and a coaxial second sliding sleeve is fixedly arranged on the second sliding hole, and the second sliding sleeve is in sliding connection with the second sliding rod.

By adopting the technical scheme, the first sliding rod slides in the first sliding sleeve, so that the first supporting plate can run more stably up and down; the second sliding rod slides in the second sliding sleeve, so that the second supporting plate can run more stably up and down.

The utility model discloses further set up to: the clamping portion comprises a T-shaped clamping groove which is formed in the second supporting plate and faces the cover plate, the clamping groove penetrates through the second supporting plate, the clamping groove comprises a first accommodating groove and a second accommodating groove at the lower end of the first accommodating groove, the first accommodating groove accommodates a pushing handle of the liquid adding pump, and the second accommodating groove accommodates a pump rod of the liquid adding pump.

Through adopting above-mentioned technical scheme, pushing away the handle of liquid feeding pump and leaning on first holding tank, can drive the pump rod upward movement when joint portion upward movement, make the liquid feeding pump produce the negative pressure and carry out imbibition work, the second holding tank is used for holding the pump rod of liquid feeding pump, guarantees that the pump rod of liquid feeding pump and liquid feeding pump move at coaxial direction, guarantees the imbibition or goes on smoothly of annotating liquid.

The utility model discloses further set up to: the other end of the first lead screw and the other end of the second lead screw are both free ends.

Through adopting above-mentioned technical scheme, guaranteeing under the steady prerequisite of first layer board and second layer board up-and-down motion, making the other end of first lead screw and second lead screw be the free end, can reduce equipment volume, convenient maintenance.

The utility model discloses further set up to: the first supporting plate is provided with a second slide rod and a abdicating hole of a second screw rod respectively; and the second supporting plate is respectively provided with a first sliding rod and a yielding hole of a first lead screw.

Through adopting above-mentioned technical scheme, can guarantee the smooth installation of first slide bar, second slide bar, first lead screw and second lead screw through setting up the hole of stepping down, guarantee the up-and-down motion that first layer board and second layer board are unimpeded.

The utility model discloses further set up to: the tip head is embedded in the liquid adding pipe, and a tip head removing mechanism for separating the tip head from the liquid adding pipe of the liquid adding pump is further arranged below the supporting sheet.

By adopting the technical scheme, in order to prevent cross infection, the tip head is disposable, and the tip head is separated by the tip head removing mechanism.

The utility model discloses further set up to take off tip head mechanism includes L shape separation plates that the support sheet below set up, the separation plate includes the riser, the riser lower extreme is equipped with rather than perpendicular and to the liquid feeding pump direction extension separation sheet, set up the corresponding recess of liquid feeding pipe with the liquid feeding pump on the separation sheet, the vertical push rod of separation sheet both ends difference fixed connection, be equipped with the through-hole corresponding with the push rod on the loading board, the through-hole is worn to establish upwards to the push rod, the push rod upper end is equipped with the link stopper, cup joint separation spring on the push rod between link stopper and the loading board.

Through adopting above-mentioned technical scheme, after annotating the liquid and accomplishing, the second motor drives the second lead screw and makes the second layer board continue downstream, then the second layer board pushes down the push rod, and the push rod drives the stripper downstream, and the recess extrusion tip head on the stripper pushes away the tip head from the liquid feeding pipe of liquid feeding pump, accomplishes and takes off tip head work.

The utility model discloses further set up to: the holding tank on the loading board sets up 8.

Through adopting above-mentioned technical scheme, place 8 liquid feeding pumps in the holding tank, drive first layer board and second layer board at first motor and reciprocate the process, once can make 8 liquid feeding pumps reciprocate in step, can carry out the synchronous absorption or the notes liquid of 8 test solutions, improved the efficiency that moves the liquid greatly, improved production efficiency.

To sum up, the utility model discloses a beneficial technological effect does:

1. bear the liquid feeding pump and drive from top to bottom the load-bearing device through adopting the load-bearing device, thereby realize that the liquid feeding pipe of liquid feeding pump gets into reagent imbibition district, test solution notes liquid district, realize promoting or releasing the handle that pushes away of liquid feeding pump through inhaling notes liquid mechanism, thereby realize the imbibition or the notes liquid of liquid feeding pump, the device degree of automation is high, the liquid feeding pump displacement is steady, the liquid feeding pump is good with the pump rod axiality of liquid feeding pump, it is accurate, the imbibition of reagent, annotate the liquid accurate, degree of automation is high.

2. Through setting up first guiding mechanism and second guiding mechanism, make first layer board and second layer board up-and-down motion's precision high, operate steadily.

3. Through setting up and taking off tip head mechanism, can once annotate the liquid and accomplish the back, realize the separation between tip head and the liquid feeding pipe of liquid feeding pump through taking off tip head mechanism, prevent the cross infection of imbibition, notes liquid in-process.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the present invention without the outer cover;

fig. 3 is a cross-sectional view of the present invention;

fig. 4 is another angle structure diagram of the present invention;

FIG. 5 is a schematic structural view of the cover of the present invention;

fig. 6 is a schematic structural view of the separation plate of the present invention.

Figure 1, frame body; 2. a liquid adding pump; 3. a carrying device; 31. a carrier plate; 32. accommodating grooves; 33. a stop member; 34. an elastic member; 35. a housing; 351. a cover plate; 352. a support sheet; 3521. inserting holes; 36. a through hole; 4. a drive mechanism; 41. a first pallet; 42. a support plate; 43. a first motor; 44. a first lead screw; 45. a first lead screw nut; 46. a first guide mechanism; 461. a first sliding hole; 462. a first slide bar; 463. a first sliding sleeve; 5. a liquid sucking and injecting mechanism; 51. a second pallet; 52. a motor frame; 53. a second motor; 54. a second lead screw; 55. a second lead screw nut; 56. a second guide mechanism; 561. a second sliding hole; 562. a second slide bar; 563. a second sliding sleeve; 6. a clamping part; 61. a card slot; 611. a first accommodating groove; 612. a second accommodating groove; 7. a hole of abdication; 8. tip head; 9. a tip head removing mechanism; 91. a separation plate; 911. a vertical plate; 912. separating the sheet; 9121. a groove; 92. a push rod; 93. a stop block; 94. the spring is disengaged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-6, a liquid transfer device comprises a door-shaped frame body 1, a bearing device 3 for bearing a liquid adding pump 2 and a driving mechanism 4 capable of driving the bearing device 3 to move up and down are arranged in the frame body 1, and a liquid sucking and injecting mechanism 5 for sucking or injecting liquid by the liquid adding pump 2;

bearing device 3 includes the loading board 31 of horizontal setting in the support body 1, loading board 31 front side is opened and is equipped with a plurality of front opening's vertical holding tank 32, all inlay in every holding tank 32 and establish liquid feeding pump 2, the liquid feeding pipe upper end of liquid feeding pump 2 is equipped with supports and keeps off piece 33, support and keep off 2 covers of liquid feeding pump between piece 33 and the loading board 31 and establish elastic component 34, loading board 31 front side fixed connection dustcoat 35, dustcoat 35 includes vertical apron 351 and the support piece 352 of apron 351 lower extreme with loading board 31 fixed connection, support piece 352 is perpendicular and extends to liquid feeding pump 2 direction with apron 351, be equipped with the spliced eye 3521 corresponding with the liquid feeding pipe of liquid feeding pump 2 on the support piece 352, spliced eye 3521 is worn to establish by the liquid feeding pipe of liquid feeding pump 2, support and keep off piece 33 and support piece 352.

The driving mechanism 4 comprises a horizontal first supporting plate 41 fixedly connected with the rear side of the bearing plate 31, a horizontal supporting plate 42 fixed on two vertical side walls of the frame body 1 is arranged below the first supporting plate 41, a first motor 43 vertically arranged at the upper end of the frame body 1 is fixedly connected, a vertical first lead screw 44 is connected with the output end of the first motor 43, a first lead screw nut 45 fixedly connected with the first lead screw 44 is fixedly connected onto the first supporting plate 41, and a first guiding mechanism 46 guiding the first supporting plate 41 to move up and down is further arranged on the first supporting plate.

Inhale notes liquid mechanism 5 and include second layer board 51 that first layer board 41 top set up, first layer board 41 rear side is equipped with motor frame 52, motor frame 52 upper end sets firmly vertical second motor 53, vertical second lead screw 54 is connected to the output of second motor 53, second layer board 51 goes up the second screw nut 55 of fixed connection and second lead screw 54 looks adaptation, still be equipped with its second guiding mechanism 56 that reciprocates of guide on the second layer board 51, second layer board 51 front side is equipped with the joint portion 6 that is used for joint filling pump 2's the handle that pushes away.

The first motor 43 and the second motor 53 are connected to P L C which coordinates movement of the two.

The first motor 43 can drive the first supporting plate 41, the bearing plate 31, the charging pump 2, the outer cover 35 and the second supporting plate 51 to move up and down through the forward and reverse rotation of the first lead screw 44. When the first motor 43 rotates positively to drive the first supporting plate 41 and the second supporting plate 51 to move downwards simultaneously, so that the liquid adding pump 2 moves to the lower part, a liquid adding pipe of the liquid adding pump 2 is positioned in a reagent liquid sucking area, then, the second motor 53 rotates positively to drive the second supporting plate 51 to move upwards through the second lead screw 54, the clamping part 6 on the second supporting plate 51 drives the push handle of the liquid adding pump 2 to move upwards, and the push handle drives the pump rod of the liquid adding pump 2 to move upwards, so that the liquid adding pump 2 generates negative pressure, and the liquid adding pump 2 performs liquid sucking work; the first motor 43 rotates reversely to drive the first supporting plate 41 and the second supporting plate 51 to move upwards simultaneously, namely the first motor 43 drives the liquid adding pump 2 to move upwards to reserve a moving channel for the reagent kit, the reagent liquid injection area moves below the liquid adding pipe of the liquid adding pump 2, the first motor 43 rotates forward again to drive the first supporting plate 41 and the second supporting plate 51 to move downwards simultaneously, so that the liquid adding pipe of the liquid adding pump 2 is located in the reagent liquid injection area, then the second motor 53 rotates reversely to drive the second supporting plate 51 to move downwards through the second lead screw 54, the push handle of the liquid adding pump 2 loses the lifting of the clamping part 6 on the second supporting plate 51, and the pump rod of the liquid adding pump 2 injects the test liquid in the liquid adding pump 2 into the reagent liquid injection area under the action of the elastic part in the liquid adding pump 2. The process is repeated to move, so that the liquid absorption or injection of the test solution is carried out, and the liquid removal work is finished.

In order to improve the precision and the smoothness of the movement of the first supporting plate 41 and the second supporting plate 51, the first lead screw 44 and the second lead screw 54 are both T-shaped screws.

When assembling the liquid feeding pump 2, firstly, the elastic part 34 is sleeved outside the liquid feeding pump 2, and the elastic part 34 is respectively abutted against the abutting block 93 and the bearing plate 31, then the liquid feeding pump 2 is placed in the containing groove 32, a certain gap exists between the liquid feeding pump 2 and the containing groove 32, meanwhile, a pump rod and a push handle of the liquid feeding pump 2 are assembled in the clamping part 6, then a liquid feeding pipe of the liquid feeding pump 2 penetrates through the insertion hole 3521 of the outer cover 35, the cover plate 351 of the outer cover 35 is fixed with the bearing plate 31, and the supporting sheet 352 of the outer cover 35 is abutted against the abutting block 33, the bearing plate 31 and the outer cover 35 are enclosed to enable the liquid feeding pump 2 to only generate displacement in the axial direction, and the liquid feeding pump 2 is flexibly installed in the containing groove 32 and the clamping part 6 through the.

When the pump rod of the liquid adding pump 2 is matched with the liquid adding pump 2, the pump rod of the liquid adding pump 2 and the liquid adding pump 2 have no external force action in the radial direction, so that the coaxiality of the pump rod and the liquid adding pump 2 is ensured, and meanwhile, when the pump rod of the liquid adding pump 2 moves upwards along with the clamping part 6, the elastic part 34 can buffer the clamping part 6 and the pump rod of the liquid adding pump 2, so that the movement process of the pump rod of the liquid adding pump 2 is smooth, and a better liquid sucking and injecting effect is achieved; when a plurality of liquid feeding pumps 2 are installed on the bearing plate 31, the elastic piece 34 is compressed, so that 8 liquid feeding pumps 2 can be stably embedded in the accommodating groove 32, the movement of the liquid feeding pumps 2 in the up-down direction is avoided, and the liquid suction or injection of the liquid feeding pumps 2 can be synchronized.

In this embodiment, still install tip head 8 additional on liquid feeding pump 2, when installing tip head 8 additional, tip head 8 is located under liquid feeding pump 2's the liquid feeding pipe, when liquid feeding pump 2 moves down, liquid feeding pump 2's liquid feeding pipe inserts in tip head 8, first motor 43 still needs to drive first layer board 41 and second layer board 51 and continues to move down one section distance this moment, at this moment, elastic component 34 is compressed by loading board 31, make liquid feeding pump 2's liquid feeding pipe and tip head be flexible grafting, prevent to move down the hard collision of in-process to the tip head at liquid feeding pump 2, the accuracy and the reliability of tip head installation have been protected.

The elastic piece 34 can buffer the clamping part 6 and the pump rod of the liquid adding pump 2, so that the pump rod of the liquid adding pump 2 is gentle in motion process, and a better liquid sucking and injecting effect is achieved.

The forward and reverse rotation and the operation time of the first motor 43 and the second motor 53 are controlled in a coordinated manner through the P L C.

The first guiding mechanism 46 in this embodiment includes that the first supporting plate 41 at two sides of the first lead screw 44 is respectively provided with a first sliding hole 461, each first sliding hole 461 is respectively sleeved with a vertical first sliding rod 462, and two ends of each first sliding rod 462 are respectively fixedly connected with the upper end of the frame body 1 and the supporting plate 42; the second guiding mechanism 56 includes second sliding holes 561 respectively formed on the second supporting plates 51 at two sides of the second screw 54, each second sliding hole 561 is respectively sleeved with a vertical second sliding rod 562, and two ends of each second sliding rod 562 are respectively and fixedly connected with the upper end of the frame body 1 and the supporting plate 42.

The first sliding rod 462 slides in the first sliding hole 461, so that the stability of the up-and-down operation of the first supporting plate 41 is ensured; the second sliding rod 562 slides in the second sliding hole 561, so that the stability of the up-and-down movement of the second supporting plate 51 is ensured.

Furthermore, a coaxial first sliding sleeve 463 is fixedly arranged on the first sliding hole 461, and the first sliding sleeve 463 is slidably connected with the first sliding rod 462; a second sliding sleeve 563 is coaxially fixed on the second sliding hole 561, and the second sliding sleeve 563 is slidably connected to the second sliding rod 562.

The first sliding rod 462 slides in the first sliding sleeve 463, so that the up-and-down running of the first supporting plate 41 is more stable; the second sliding rod 562 slides in the second sliding sleeve 563, so that the second supporting plate 51 can run up and down more stably.

The other end of the first lead screw 44 and the other end of the second lead screw 54 are both free ends.

The other ends of the first lead screw 44 and the second lead screw 54 are free ends, so that the size of the device can be reduced and the maintenance is convenient on the premise of ensuring the stable up-and-down motion of the first supporting plate 41 and the second supporting plate 51.

The first supporting plate 41 is respectively provided with a second sliding rod 562 and a yielding hole 7 of a second screw 54; the second supporting plate 51 is provided with a first sliding rod 462 and a yielding hole 7 of the first lead screw 44 respectively.

The arrangement of the offset hole 7 can ensure the smooth installation of the first sliding rod 462, the second sliding rod 562, the first lead screw 44 and the second lead screw 54, and ensure the unimpeded up-and-down movement of the first supporting plate 41 and the second supporting plate 51.

The tip head 8 is embedded on the liquid adding pipe, and a tip head removing mechanism 9 for separating the tip head 8 from the liquid adding pipe of the liquid adding pump 2 is arranged below the supporting sheet 352.

In order to prevent cross infection, the tip head 8 is disposable, so after the completion of liquid suction and injection, the tip head needs to be separated from the liquid feeding pipe of the liquid feeding pump 2, and the tip head 8 needs to be separated by the tip head removing mechanism 9.

In this embodiment, the tip removing head mechanism 9 includes an L-shaped separation plate 91 disposed below the supporting plate 352, the separation plate 91 includes a vertical plate 911, a separation plate 912 perpendicular to the vertical plate 911 and extending toward the direction of the charge pump 2 is disposed at the lower end of the vertical plate 911, a groove 9121 corresponding to the charge pipe of the charge pump 2 is disposed on the separation plate 912, two ends of the separation plate 912 are respectively and fixedly connected to a vertical push rod 92, a through hole 36 corresponding to the push rod 92 is disposed on the bearing plate 31, the push rod 92 upwardly penetrates through the through hole 36, a stopper 93 is disposed at the upper end of the push rod 92, and a separation spring 94 is sleeved on the push rod 92 between the stopper 93 and the bearing.

As shown in fig. 4, after each injection is completed, the second motor 53 drives the second lead screw 54 to make the second supporting plate 51 move downward, the second supporting plate 51 presses the push rod 92 downward, the push rod 92 overcomes the elastic force of the separation spring 94 to drive the separation plate 91 to move downward, the groove 9121 on the separation sheet 912 extrudes the tip head 8, and the tip head 8 is pushed away from the liquid feeding pipe of the liquid feeding pump 2, so that the operation of removing the tip head 8 is completed.

The clamping portion 6 includes a T-shaped clamping groove 61 with an opening facing the cover plate 351 and formed in the second supporting plate 51, the clamping groove 61 penetrates through the second supporting plate 51, the clamping groove 61 includes a first accommodating groove 611 and a second accommodating groove 612 at the lower end thereof, the first accommodating groove 611 accommodates a push handle of the charge pump 2 and abuts against the lower end thereof, and the second accommodating groove 612 accommodates a pump rod of the charge pump 2.

The first accommodating groove 611 and the second accommodating groove 612 of this embodiment are both cylindrical grooves, and the diameter of the first accommodating groove 611 is larger than that of the second accommodating groove 612, so that the push handle of the liquid adding pump 2 is clamped into the first accommodating groove 611 and then cannot be disengaged from the second accommodating groove 612, and it is ensured that the push handle of the liquid adding pump 2 drives the pump rod of the liquid adding pump 2 to move upwards in the process that the clamping part 6 moves upwards; a gap is reserved between the pushing handle of the liquid adding pump 2 and the first accommodating groove 611, the lower end of the first accommodating groove 611 abuts against the lower end of the pushing handle of the liquid adding pump 2, a gap is reserved between the pump rod of the liquid adding pump 2 and the second accommodating groove 612, it is guaranteed that the clamping portion 6 can be separated from the pushing handle of the liquid adding pump 2 and slide downwards along the pump rod of the liquid adding pump 2 in the working process of removing the tip head 8, the second supporting plate 51 presses the push rod 92 downwards, the push rod 92 pushes the separating sheet 912 downwards, and the separating sheet 912 pushes the tip head 8 away from the liquid adding pipe of the liquid adding pump 2.

Through the opening towards apron 351 that sets up on the second layer board 51 and the preceding opening of holding tank 32 on the loading board 31, can pack into holding tank 32 and joint portion 6 with the pump rod of liquid feeding pump 2, liquid feeding pump 2 and the handle that pushes away of liquid feeding pump 2 from the front side, easy to assemble maintains.

The handle that pushes away of liquid feeding pump 2 supports and leans on first holding tank 611, can drive the pump rod upward movement of liquid feeding pump 2 during 6 upward movements of joint portion, makes liquid feeding pump 2 produce the negative pressure and carries out imbibition work, and second holding tank 612 is used for holding the pump rod of liquid feeding pump 2, makes the pump rod of liquid feeding pump 2 and liquid feeding pump 2 radially no exogenic action, guarantees the pump rod of liquid feeding pump 2 and the axiality of liquid feeding pump 2, has ensured the precision of going on smoothly and imbibition and notes liquid of imbibition and liquid work of imbibition and notes liquid.

The number of the accommodating grooves 32 on the carrier plate 31 of this embodiment is 8. Place 8 liquid feeding pumps 2 in holding tank 32, drive first layer board 41 and second layer board 51 at first motor 43 and reciprocate the process, once can make 8 liquid feeding pumps 2 reciprocate in step, can carry out the synchronous absorption of 8 test solutions or annotate the liquid, improve the efficiency that moves the liquid greatly, improved production efficiency.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A liquid transfer device is characterized by comprising a door-shaped frame body, wherein a bearing device for bearing a liquid adding pump and a driving mechanism capable of driving the bearing device to move up and down are arranged in the frame body;

2. The pipetting device according to claim 1, wherein the first guide mechanism comprises first sliding holes respectively formed in the first support plates on both sides of the first lead screw, each first sliding hole is respectively sleeved with a vertical first slide bar, and both ends of each first slide bar are respectively fixedly connected with the upper end of the rack body and the support plate; the second guide mechanism comprises second support plates on two sides of the second lead screw, second sliding holes are formed in the second support plates respectively, vertical second sliding rods are sleeved in the second sliding holes respectively, and two ends of each second sliding rod are fixedly connected with the upper end of the frame body and the support plate respectively.

3. The pipetting device as recited in claim 2 wherein a coaxial first sliding sleeve is fixedly arranged on the first sliding hole, and the first sliding sleeve is slidably connected with the first sliding rod; and a coaxial second sliding sleeve is fixedly arranged on the second sliding hole, and the second sliding sleeve is in sliding connection with the second sliding rod.

4. The pipette device according to claim 1, wherein the engagement portion includes a T-shaped engagement groove formed in the second support plate and having an opening facing the cover plate, the engagement groove extending through the second support plate, and the engagement groove includes a first receiving groove for receiving the plunger of the liquid feeding pump and a second receiving groove formed in a lower end of the first receiving groove for receiving the pump rod of the liquid feeding pump.

5. A pipette device according to claim 1, wherein the other end of the first lead screw and the other end of the second lead screw are both free ends.

6. The pipetting device according to claim 1, wherein the first support plate is provided with a second slide bar and a second lead screw abdicating hole; and the second supporting plate is respectively provided with a first sliding rod and a yielding hole of a first lead screw.

7. The pipetting device as recited in claim 1 wherein a tip head is nested on the fill tube and a tip head removal mechanism is provided below the blade to separate the tip head from the fill tube of the fill pump.

8. The pipetting device as recited in claim 7, wherein the tip-off head mechanism comprises an L-shaped separation plate arranged below the support plate, the separation plate comprises a vertical plate, a separation plate is arranged at the lower end of the vertical plate and extends perpendicularly to the vertical plate and towards the direction of the liquid feeding pump, a groove corresponding to the liquid feeding pipe of the liquid feeding pump is formed in the separation plate, two ends of the separation plate are respectively and fixedly connected with a vertical push rod, a through hole corresponding to the push rod is formed in the bearing plate, the push rod penetrates through the through hole upwards, a stopper is arranged at the upper end of the push rod, and a separation spring is sleeved on the push rod between the stopper and the bearing plate.

9. Pipetting device according to claim 1, characterized in that the receiving recesses in the carrier plate are provided in 8.