CN219072985U

CN219072985U - Integrated liquid-transferring plunger pump

Info

Publication number: CN219072985U
Application number: CN202223529602.5U
Authority: CN
Inventors: 吴巍; 丁晓明; 张国家; 廖彩祥; 华志强; 荆磊; 颜亮
Original assignee: Orient Immunoassay Suzhou Medical Technology Co ltd
Current assignee: Orient Immunoassay Suzhou Medical Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-26
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses an integrated liquid-moving plunger pump which comprises a motor, a transmission assembly, a suction assembly and a suction head adapter which are sequentially arranged from top to bottom; the suction assembly comprises a pump body and a plunger unit, a suction cavity is formed in the pump body, and the plunger unit is in sliding fit with the suction cavity; the suction head adapter is communicated with the suction cavity; the transmission assembly comprises an assembly seat and a sliding block arranged in the assembly seat in a sliding manner, and the sliding block is connected with the plunger unit; the transmission assembly further comprises a screw rod connected with the motor and a screw rod nut fixed on the sliding block. In the utility model, all the components are sequentially arranged in the up-down direction, and the plunger unit is driven to move in a screw driving mode to realize pumping and pumping operation, the integral liquid-moving plunger pump is of a slender structure, the structure is high in compactness, and the integral liquid-moving plunger pump is suitable for small-sized equipment and is convenient to combine into a plunger pump set to carry out parallel liquid-moving operation.

Description

Integrated liquid-transferring plunger pump

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an integrated liquid-moving plunger pump.

Background

In the process of medical experiment or medicament preparation, the reagent needs to be accurately pipetted to ensure the accuracy of the content of each component in the prepared reagent, so that a pipetting device is needed, in the prior art, the pipetting device is relatively complex in structure, tends to be not regular and large in size, and when the pipetting device is used in equipment, the requirement on installation space is high, so that the applicability is poor, the pipetting device cannot be used in small equipment, and in addition, the existing pipetting device has the defects of external driving, poor accuracy, poor compatibility, inconvenience in use and the like.

Disclosure of Invention

The utility model aims to: in order to overcome the defects in the prior art, the utility model provides the integrated liquid-moving plunger pump which has the advantages of simple and compact structure, small volume and convenient use.

The technical scheme is as follows: in order to achieve the above purpose, the integrated pipetting plunger pump of the utility model comprises a motor, a transmission assembly, a suction assembly and a suction head adapter which are sequentially arranged from top to bottom; the suction assembly comprises a pump body and a plunger unit, a suction cavity is formed in the pump body, and the plunger unit is in sliding fit with the suction cavity; the suction head adapter is communicated with the suction cavity;

the transmission assembly comprises an assembly seat and a sliding block arranged in the assembly seat in a sliding manner, and the sliding block is connected with the plunger unit; the transmission assembly further comprises a screw rod connected with the motor and a screw rod nut fixed on the sliding block.

Further, the sliding block is provided with a sliding groove, a plurality of guide pins are fixed on the assembly seat, and at least one guide pin is arranged in the sliding groove at the same time.

Further, the plunger unit is of a hollow structure with an opening at the upper part, and the lead screw can extend into the plunger unit; the upper end of the plunger unit is provided with an outer flange, the sliding block is provided with a pressing block, and the outer flange is clamped between the sliding block and the pressing block.

Further, a sleeve body capable of sliding relative to the suction head adapter is sleeved on the outer side of the suction head adapter, a push block is slidably mounted in the assembly seat, and the sleeve body is connected with the push block through a transmission column penetrating through the pump body; the sliding block can drive the pushing block to slide.

Further, the push block is provided with an ear part connected with the transmission column; the assembly seat has a stop shoulder therein that limits the ear.

Further, the motor is a stepping motor; and a control box is arranged on the side of the motor and the transmission assembly, and a driving plate connected with the motor is arranged in the control box.

Further, the device also comprises a sensing plate, wherein the sensing plate is provided with an air pressure sensor, the bottom of the suction cavity is connected with a detection hole, and the air pressure sensor is arranged at the outer side of the detection hole; optionally, the sensor board is also provided with a temperature sensor.

Further, the assembly seat and the pump body are respectively provided with a first groove and a second groove, the first groove and the second groove are communicated to form a mounting groove, and the sensing plate is mounted in the mounting groove.

Further, the sensor board is also provided with a position sensor arranged in the assembly seat, and the pushing block is provided with a sensing piece.

Further, a cover body is fixed at the upper end of the pump body, a first rubber ring and a second rubber ring are clamped between the cover body and the pump body, and the second rubber ring is in contact with the plunger unit.

The beneficial effects are that: the integrated liquid-moving plunger pump provided by the utility model comprises the components which are sequentially arranged in the vertical direction and are driven by a self-powered motor to move by a screw driving mode to realize pumping and pumping operation, and the integrated liquid-moving plunger pump is of an elongated structure, has high structural compactness, is suitable for small equipment, is convenient to combine into a plunger pump group to perform parallel liquid-moving operation, and can be used for precise liquid sample adding of in-vitro diagnostic instruments, precise experimental equipment, nucleic acid extractors and liquid-moving workstations. In the preferred scheme, the integrated liquid-moving plunger pump can automatically remove the suction head by means of the sliding block, the suction head is not required to be removed by means of external equipment, and the volume of the plunger pump is not obviously increased due to the addition of the suction head removing function.

Drawings

FIG. 1 is an outline view of an integrated pipetting plunger pump;

FIG. 2 is an exploded view of an integrated pipetting plunger pump;

FIG. 3 is a first cross-sectional view of an integrated pipetting plunger pump;

fig. 4 is a second cross-sectional view of an integrated pipetting plunger pump.

In the figure: 1-a motor; 2-a transmission assembly; 21-an assembly base; 21 a-a first groove; 21 b-stop shoulders; 22-slide block; 221-sliding grooves; 23-screw rod; 24-screw nut; 25-a guide pin; 26-briquetting; 3-a suction assembly; 31-a pump body; 31 a-a suction lumen; 31 b-a second groove; 31 c-a detection hole; a 32-plunger unit; 32 a-outer flange; 33-a cover; 34-a first rubber ring; 35-a second rubber ring; 4-tip adapter; 51-sleeve body; 52-pushing blocks; 52 a-a sensor patch; 52 b-ear; 53-drive column; 61-control box; 62-a drive plate; 71-a sensor plate; 72-an air pressure sensor; 73-a position sensor; 74-cover plate.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

The integrated pipetting plunger pump as shown in fig. 1-2 comprises a motor 1, a transmission assembly 2, a suction assembly 3 and a suction head adapter 4 which are arranged in sequence from top to bottom; the suction assembly 3 comprises a pump body 31 and a plunger unit 32, wherein a suction cavity 31a is formed in the pump body 31, and the plunger unit 32 is in sliding fit with the suction cavity 31 a; the suction head adapter 4 communicates with the suction chamber 31 a;

the transmission assembly 2 comprises an assembly seat 21 and a sliding block 22 arranged in the assembly seat 21 in a sliding manner, and the sliding block 22 is connected with the plunger unit 32; the transmission assembly 2 further comprises a screw 23 connected to the motor 1 and a screw nut 24 fixed to the slider 22.

The motor 1 is a stepping motor; a control box 61 is arranged on the lateral sides of the motor 1 and the transmission assembly 2, and a driving plate 62 connected with the motor 1 is arranged in the control box 61.

By adopting the structure, the components are sequentially arranged in the vertical direction, and the plunger unit 32 is driven to move in a screw driving mode to realize pumping and pumping operation, the integral type liquid-moving plunger pump is of a slender structure, the structure compactness is high, the liquid-moving plunger pump is suitable for small-sized equipment, and the liquid-moving plunger pump is convenient to combine into a plunger pump set to carry out parallel liquid-moving operation.

Preferably, as shown in fig. 4, the sliding block 22 has a sliding slot 221, and a plurality of guide pins 25 are fixed on the assembly base 21, and at least one guide pin 25 is disposed in the sliding slot 221 at the same time. In this embodiment, two guide pins 25 are mounted on the assembly seat 21, the two guide pins 25 are disposed up and down, when the slide block 22 is higher, the upper guide pin 25 acts on the slide slot 221, and when the slide block 22 is lower, the lower guide pin 25 acts on the slide slot 221; when the slide 22 is positioned in the middle, two guide pins 25 are simultaneously placed in the slide grooves 221 to complete the transition, and the situation that no guide pin 25 acts on the slide grooves 221 is prevented.

Preferably, the plunger unit 32 has a hollow structure with an opening at the upper part, and the screw rod 23 can extend into the plunger unit 32; the plunger unit 32 has an outer flange 32a at an upper end thereof, and the slider 22 is provided with a pressing block 26, and the outer flange 32a is sandwiched between the slider 22 and the pressing block 26. By this structure, the plunger unit 32 can be firmly fixed to the slider 22, and the pressing block 26 has a relief groove to prevent interference with the guide pin 25. In addition, through emptying the plunger unit 32 to the operation of lead screw 23 and stepping down, can shorten the length of integral type liquid-moving plunger pump greatly, promote compactness.

The upper end of the pump body 31 is fixed with a cover body 33, a first rubber ring 34 and a second rubber ring 35 are clamped between the cover body 33 and the pump body 31, and the second rubber ring 35 is in contact with the plunger unit 32. By providing the first rubber ring 34 and the second rubber ring 35, the suction chamber 31a can be sufficiently sealed, and the pumping precision can be ensured.

In order to enable the integrated pipetting plunger pump to automatically remove the pipette tips, as shown in fig. 3, a sleeve body 51 capable of sliding relative to the pipette tip adapter 4 is sleeved outside the pipette tip adapter 4, a push block 52 is slidably mounted in the assembly seat 21, and the sleeve body 51 and the push block 52 are connected through a transmission column 53 penetrating through the pump body 31; the sliding block 22 can drive the pushing block 52 to slide. When the suction head is arranged at the lower end of the suction head adapter 4, the suction head enables the sleeve body 51, the push block 52 and the transmission column 53 to be in a high position; the slide block 22 moves outside the movement range of the push block 52 to perform pipetting operations of pumping and spitting; when the suction head mounted on the suction head adapter 4 needs to be removed, the sliding block 22 enters the movement range of the pushing block 52 and pushes the pushing block 52 to move downwards, the pushing block 52 pushes the sleeve body 51 to move downwards through the transmission column 53, and the suction head is pushed away from the suction head adapter 4 by the lower end of the sleeve body 51, so that automatic suction head removal is realized. In the process, the sliding block 22 is utilized to automatically remove the suction head, so that a power unit is not additionally arranged, a complex structure is also avoided, and the compactness of the structure can be maintained.

The push block 52 is provided with an ear 52b connected with the transmission column 53; the assembly seat 21 is internally provided with a stop shoulder 21b for limiting the lug 52b, and the stop shoulder 21b is used for limiting the upper limit of the lug 52b so as to prevent the suction head from being damaged by being pushed through the position when the suction head is mounted on the suction head adapter 4.

Preferably, the sensor plate 71 is further included, the assembly seat 21 and the pump body 31 are respectively formed with a first groove 21a and a second groove 31b, the first groove 21a and the second groove 31b are communicated to form a mounting groove, and the sensor plate 71 is mounted in the mounting groove, so that the sensor plate 71 is in a hidden state, the structural compactness of the integrated pipetting plunger pump can be maintained, and the sensor plate 71 can be protected. A cover plate 74 is also mounted to the mounting groove to cover the sensor plate 71.

The sensor plate 71 has an air pressure sensor 72, the bottom of the suction chamber 31a is connected to the detection hole 31c, and the air pressure sensor 72 is disposed outside the detection hole. In the pumping process, since the data generated by the air pressure sensor 72 is significantly different from that of the normal pumping process, the control unit can determine whether the plunger pump is in the air suction state, and in addition, the control unit can detect the liquid level and detect whether the sucked reagent is clotted according to the data generated by the air pressure sensor 72.

Preferably, the sensor plate 71 further has a position sensor 73 disposed in the assembly seat 21, and the push block 52 has a sensing piece 52a thereon. By means of the data generated by the position sensor 73, the control unit can determine whether the push block 52 is in a high position when the slide 22 does not enter the movement range of the push block 52, wherein the push block 52 is in a high position, which means that the suction head is correctly mounted below the suction head adapter, or else the push block 52, the sleeve 51 and the transmission column 53 are lowered to a low position under the action of gravity.

Preferably, the sensor plate 71 is further provided with a temperature sensor built in the plunger pump, and the control unit can perform liquid sucking and discharging temperature compensation according to temperature data collected by the temperature sensor, so as to eliminate the influence of thermal expansion and contraction on dosage as much as possible, and improve the pipetting accuracy.

In addition, the integrated liquid-moving plunger pump is communicated with an external control unit based on the CAN/RS485 bus technology, so that the compatibility of the pump is improved, the integrated liquid-moving plunger pump CAN be applied to various industries, and the reliability and the efficiency are improved.

The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. An integrated liquid-moving plunger pump is characterized by comprising a motor (1), a transmission assembly (2), a suction assembly (3) and a suction head adapter (4) which are sequentially arranged from top to bottom; the suction assembly (3) comprises a pump body (31) and a plunger unit (32), wherein a suction cavity (31 a) is formed in the pump body (31), and the plunger unit (32) is in sliding fit with the suction cavity (31 a); -said tip adapter (4) is in communication with said suction chamber (31 a);

the transmission assembly (2) comprises an assembly seat (21) and a sliding block (22) arranged in the assembly seat (21) in a sliding manner, and the sliding block (22) is connected with the plunger unit (32); the transmission assembly (2) further comprises a screw rod (23) connected with the motor (1) and a screw rod nut (24) fixed on the sliding block (22).

2. The integrated pipetting plunger pump as recited in claim 1, wherein the slide (22) has a slide groove (221), and a plurality of guide pins (25) are fixed to the assembly base (21), and at least one guide pin (25) is disposed in the slide groove (221) at the same time.

3. The integrated pipetting plunger pump as recited in claim 1, wherein the plunger unit (32) is of hollow structure with an open top, the lead screw (23) being able to extend into the plunger unit (32); the upper end of the plunger unit (32) is provided with an outer flange (32 a), the sliding block (22) is provided with a pressing block (26), and the outer flange (32 a) is clamped between the sliding block (22) and the pressing block (26).

4. The integrated pipetting plunger pump according to claim 1, wherein the outside of the tip adapter (4) is sleeved with a sleeve body (51) which can slide relative to the tip adapter, a push block (52) is slidably mounted in the assembly seat (21), and the sleeve body (51) and the push block (52) are connected through a transmission column (53) penetrating the pump body (31); the sliding block (22) can drive the pushing block (52) to slide.

5. The integrated pipetting plunger pump as recited in claim 4, wherein the push block (52) has ears (52 b) thereon that connect the drive post (53); the assembly seat (21) has a stop shoulder (21 b) therein which limits the ear (52 b).

6. The integrated pipetting plunger pump as recited in claim 1, wherein the motor (1) is a stepper motor; a control box (61) is arranged on the side of the motor (1) and the transmission assembly (2), and a driving plate (62) connected with the motor (1) is arranged in the control box (61).

7. The integrated pipetting plunger pump as recited in claim 4, further comprising a sensor plate (71), the sensor plate (71) having a barometric pressure sensor (72), the bottom of the aspiration chamber (31 a) being connected to a detection aperture, the barometric pressure sensor (72) being placed outside the detection aperture; optionally, the sensor board (71) also has a temperature sensor thereon.

8. The integrated pipetting plunger pump as recited in claim 7, wherein a first groove (21 a) and a second groove (31 b) are formed in the assembly seat (21) and the pump body (31), respectively, the first groove (21 a) and the second groove (31 b) are communicated to form a mounting groove, and the sensing plate (71) is mounted in the mounting groove.

9. The integrated pipetting plunger pump as recited in claim 8, wherein the sensor plate (71) further has a position sensor (73) disposed within the assembly seat (21) and the pusher (52) has a sensing tab (52 a) thereon.

10. The integrated pipetting plunger pump according to claim 1, wherein a cover (33) is fixed to an upper end of the pump body (31), a first rubber ring (34) and a second rubber ring (35) are sandwiched between the cover (33) and the pump body (31), and the second rubber ring (35) is in contact with the plunger unit (32).