CN213644193U

CN213644193U - Liquid transfer rack

Info

Publication number: CN213644193U
Application number: CN202022064412.5U
Authority: CN
Inventors: 王维杰; 周学军
Original assignee: Xiangshan First People's Hospital Medical And Health Group
Current assignee: Xiangshan First People's Hospital Medical And Health Group
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-07-09
Anticipated expiration: 2030-09-18

Abstract

The application discloses a liquid transfer rack, which comprises a liquid transfer pipe, an aspirator, a mounting plate, a connecting frame, a plurality of gun heads, a plurality of connecting pipes and a plurality of valve bodies, wherein the aspirator is arranged on the liquid transfer pipe and is used for controlling the liquid transfer pipe to absorb or discharge liquid; the mounting plate is horizontally arranged below the pipette and is connected with the pipette through the connecting frame; the valve bodies are arranged on the mounting plate at equal intervals, and each valve body is communicated with the lower end of the pipette through a connecting pipe; the plurality of gun heads correspond to the plurality of valve bodies one by one, and the gun heads are detachably connected to the lower ends of the valve bodies. The structure is simple, the layout is reasonable, and the use is convenient; the number of the gun heads corresponding to the number of the required experimental samples can be selected to be assembled at the lower end of the valve body, so that the number of the gun heads can be reasonably arranged, and the universality is high; and when the gun head is not assembled at the lower end of the valve body, the valve body can be closed, so that the phenomenon that air or liquid is leaked is avoided.

Description

Liquid transfer rack

Technical Field

The application relates to the field of medical detection equipment, in particular to a liquid transfer rack.

Background

Pipetting racks are commonly used for pipetting small or minute volumes of liquid in medical laboratories. In the fields of medicine, drug, gene and protein research, biological research, drug development laboratories, and other biotechnology applications, it is often necessary to manipulate laboratory samples in various laboratory protocols using a pipetting rack that first aspirates a volume of liquid into the rack and then manually dispenses the liquid into one or more test tubes in sequence.

When the number of experimental batches is large, a large amount of time is consumed for sampling, so that the inspection period is long, and the inspection efficiency is low. Therefore, a wide variety of multi-channel pipetting racks are also available on the market, i.e. a plurality of tips are arranged in a matrix arrangement, so that the aspirated liquid can be dispensed into a plurality of test tubes at one time.

However, because the number of the required experimental samples is different due to different experimental batches, a plurality of pipetting racks with different numbers and specifications need to be arranged, the use is inconvenient, the universality is poor, and the pipetting racks with various specifications occupy the space in a laboratory; in addition, when there is no pipette rack corresponding to the number of experimental samples, it is necessary to use a pipette rack having a number specification larger than the number of experimental samples, thereby increasing the number of prepared samples and causing unnecessary waste.

Disclosure of Invention

An aim at of this application is a simple structure, and is rationally distributed, convenient to use, and can adjust the liquid removal frame of rifle head quantity.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a liquid transfer rack comprises a liquid transfer pipe, an aspirator, a mounting plate, a connecting rack, a plurality of gun heads, a plurality of connecting pipes and a plurality of valve bodies, wherein the aspirator is arranged on the liquid transfer pipe and is used for controlling the liquid transfer pipe to absorb or discharge liquid; the mounting plate is horizontally arranged below the pipette and is connected with the pipette through the connecting frame; the valve bodies are arranged on the mounting plate at equal intervals, and each valve body is communicated with the lower end of the pipette through one connecting pipe; the plurality of the gun heads correspond to the plurality of the valve bodies one by one, and the gun heads are detachably connected to the lower ends of the valve bodies.

Preferably, the valve body comprises a shell, a cap, a piston, a spring and a mandril, the shell is arranged on the mounting plate, and a limiting sliding hole, a conical hole and a communicating hole are sequentially arranged in the shell from top to bottom; the lower end of the cap is covered at the upper end of the shell, the upper end of the cap is arranged on the connecting pipe, and the cap is provided with a first through hole which is used for communicating the connecting pipe and the limiting slide hole; the piston is arranged in the limiting sliding hole in a vertically sliding manner, a conical surface is arranged between the lower end surface and the outer side surface of the piston, and a second through hole for communicating the conical surface is formed in the upper end surface of the piston; the spring is arranged in the limiting sliding hole and forces the piston to slide downwards, so that the conical surface is contacted with the inner wall of the conical hole to form sealing, and the second through hole and the communicating hole are isolated; an inner threaded hole is formed in the upper end face of the gun head, a limiting hole extends downwards from the lower end of the inner threaded hole, and a third through hole penetrates downwards from the inner bottom face of the limiting hole; the lower end of the ejector rod is provided with a limiting block, the limiting block is arranged in the limiting hole, a fourth through hole is formed in the limiting block, and the fourth through hole is used for communicating the third through hole with the communication hole; when the internal thread hole is in threaded connection with the lower end of the shell, the ejector rod forces the piston to slide upwards, so that the conical surface is separated from the inner wall of the conical hole, and the second through hole is communicated with the communicating hole.

Preferably, a clamping plate protrudes radially from the outer wall of the housing, the mounting plate is provided with a mounting hole, the housing is inserted into the mounting hole, a clamping area is formed between the cap and the clamping plate, and the mounting plate is clamped by the clamping area.

Preferably, the cap is screwed to the housing.

Preferably, a sealing ring is arranged on the conical surface along the circumferential direction of the conical surface, and the sealing ring is located below the second through hole.

Preferably, the upper end of the outer side wall of the piston is provided with a receiving groove around the circumferential direction thereof, and the receiving groove is used for receiving the lower end of the spring and limiting the spring to move along the radial direction thereof.

Preferably, a connecting joint is arranged at one end, far away from the pipette, of the connecting pipe, and the connecting joint is in threaded connection with the upper end of the cap.

Preferably, the lower end face of the piston is provided with an extension rod, and the extension rod and the ejector rod are coaxially arranged.

Compared with the prior art, the beneficial effect of this application lies in:

(1) the valve bodies are arranged on the mounting plate at equal intervals, and each valve body is communicated with the lower end of the pipette through one connecting pipe; the plurality of gun heads correspond to the plurality of valve bodies one by one, and the gun heads are detachably connected to the lower ends of the valve bodies; therefore, the number of the gun heads corresponding to the number of the required experimental samples can be selected to be assembled at the lower end of the valve body, the structure is simple, the layout is reasonable, the use is convenient, the number of the gun heads can be reasonably arranged, and the universality is strong;

(2) when the gun head is not assembled at the lower end of the valve body, the valve body can be closed, so that the phenomenon that air or liquid is sucked and leaked is avoided.

Drawings

FIG. 1 is a partial cross-sectional view of a pipette rack;

FIG. 2 is a schematic view of the assembled lance tip and housing;

fig. 3 is a schematic view of the lance tip after separation from the housing.

In the figure: 1. a pipette; 2. a suction apparatus; 3. a gun head; 31. an internally threaded bore; 32. a limiting hole; 33. a third through hole; 4. mounting a plate; 41. mounting holes; 5. a connecting frame; 6. a connecting pipe; 61. connecting a joint; 7. a valve body; 71. a housing; 711. a limiting slide hole; 712. a tapered hole; 713. a communicating hole; 714. a clamping plate; 72. a cap; 721. a first through hole; 73. a piston; 731. a conical surface; 732. a second through hole; 733. an extension rod; 734. accommodating grooves; 74. a spring; 75. a top rod; 751. a limiting block; 752. a fourth via hole; 8. and (5) sealing rings.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, a liquid-transfering rack comprises a liquid-transfering tube 1, an aspirator 2, a mounting plate 4, a connecting frame 5, a plurality of gun heads 3, a plurality of connecting tubes 6 and a plurality of valve bodies 7, wherein the aspirator 2 is arranged on the liquid-transfering tube 1 and is used for controlling the liquid-transfering tube 1 to absorb or discharge liquid; the mounting plate 4 is horizontally arranged below the pipette 1, and the mounting plate 4 is connected with the pipette 1 through a connecting frame 5; a plurality of valve bodies 7 are arranged on the mounting plate 4 at equal intervals, and each valve body 7 is communicated with the lower end of the pipette 1 through a connecting pipe 6; the plurality of gun heads 3 correspond to the plurality of valve bodies 7 one by one, and the gun heads 3 are detachably connected to the lower ends of the valve bodies 7. Therefore, the number of the gun heads 3 corresponding to the number of the required experiment samples can be selected to be assembled at the lower end of the valve body 7, so that the number of the gun heads 3 can be reasonably arranged, and the universality is strong; moreover, when the gun head 3 is not assembled at the lower end of the valve body 7, the valve body 7 can be closed, so that the leakage of sucked air or liquid is avoided. The aspirator 2 is of a conventional art, and may be of either a conventional mechanical configuration (e.g., syringe) or an electrically driven configuration (e.g., pump drive).

Referring to fig. 2-3, the valve body 7 includes a housing 71, a cap 72, a piston 73, a spring 74 and a plunger 75, the housing 71 is disposed on the mounting plate 4, and a limiting slide hole 711, a tapered hole 712 and a communication hole 713 are sequentially disposed in the housing 71 from top to bottom; the lower end of the cap 72 is covered on the upper end of the shell 71, the upper end of the cap 72 is arranged on the connecting pipe 6, and the cap 72 is provided with a first through hole 721, wherein the first through hole 721 is used for communicating the connecting pipe 6 with the limiting slide hole 711; the piston 73 is arranged in the limiting sliding hole 711 in a vertically sliding manner, a conical surface 731 is arranged between the lower end surface and the outer side surface of the piston 73, and a second through hole 732 for communicating the conical surface 731 is arranged on the upper end surface of the piston 73; the spring 74 is arranged in the limit sliding hole 711, and forces the piston 73 to slide downwards, so that the conical surface 731 is contacted with the inner wall of the conical hole 712 to form a seal, and the second through hole 732 and the communication hole 713 are isolated; an internal threaded hole 31 is formed in the upper end face of the gun head 3, a limiting hole 32 extends downwards from the lower end of the internal threaded hole 31, and a third through hole 33 penetrates downwards from the inner bottom face of the limiting hole 32; the lower end of the ejector rod 75 is provided with a limiting block 751, the limiting block 751 is arranged in the limiting hole 32, the limiting block 751 is provided with a fourth through hole 752, and the fourth through hole 752 is used for communicating the third through hole 33 and the communication hole 713. Through the threaded connection between the internal thread hole 31 and the lower end of the housing 71, the gun head 3 and the housing 71 can be detachably connected (of course, the gun head 3 and the housing 71 can also be detachably connected through clamping or buckling and the like). When the female screw hole 31 is screwed into the lower end of the housing 71, the rod 75 forces the piston 73 to slide upward, so that the tapered surface 731 is separated from the inner wall of the tapered hole 712 (as shown in fig. 2), and at this time, the third through hole 33, the fourth through hole 752, the communication hole 713, the second through hole 732, the first through hole 721, and the connection pipe 6 are sequentially communicated with each other, so that the valve body 7 is in an open state. When the lance head 3 is separated from the housing 71, the ejector 75 loses the action on the piston 73, and the piston 73 slides downward under the action of the spring 74, so that the conical surface 731 contacts with the inner wall of the tapered hole 712 to form a seal (as shown in fig. 3), and at this time, the second through hole 732 and the communication hole 713 are blocked, and the valve body 7 is in a closed state.

Referring to fig. 2-3, a clamping plate 714 protrudes radially from the outer wall of the housing 71, a mounting hole 41 is formed in the mounting plate 4, the housing 71 is inserted into the mounting hole 41, and a clamping area is formed between the cap 72 and the clamping plate 714, so that the mounting plate 4 can be clamped by the clamping area, the housing 71 can be mounted and fixed on the mounting plate 4 while the cap 72 is mounted, thereby greatly simplifying the mounting steps and reducing the mounting difficulty. Preferably, the cap 72 is screwed on the housing 71, so that the cap 72 can be adjusted by rotating, thereby enhancing the clamping effect of the clamping area and greatly reducing the processing difficulty of the housing 71 and the cap 72. The tapered surface 731 is provided with a seal ring 8 along a circumferential direction thereof, and the seal ring 8 is located below the second through hole 732, as shown in fig. 3, the seal between the tapered surface 731 and the inner wall of the tapered hole 712 can be enhanced by the seal ring 8. The upper end of the outer side wall of the piston 73 is provided with a receiving groove 734 around the circumferential direction thereof, and on the one hand, the receiving groove 734 is used for receiving the lower end of the spring 74, thereby reducing the overall volume of the valve body 7; on the other hand, the receiving groove 734 can limit the movement of the spring 74 in the radial direction thereof, so that the movement accuracy of the spring 74 and the piston 73 can be improved.

In order to facilitate the connection between the connection tube 6 and the valve body 7, a connection joint 61 is arranged at one end of the connection tube 6, which is far away from the pipette 1, and the connection joint 61 is in threaded connection with the upper end of the cap 72, so that the connection or the detachment between the connection tube 6 and the cap 72 can be realized quickly.

Since the ejector pin 75 needs to extend into the communication hole 713 and act on the lower end surface of the piston 73, the length of the ejector pin 75 is relatively long, and when the lance head 3 is not assembled to the housing 71, the ejector pin 75 greatly increases the overall length of the lance head 3, thereby occupying a relatively large space. Therefore, the extension rod 733 is provided on the lower end surface of the piston 73, the extension rod 733 is arranged coaxially with the jack 75, so that the length of the jack 75 is greatly reduced, and the extension rod 733 is located inside the communication hole 713, so that the entire length of the housing 71 is not increased.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A liquid transfer rack comprises a liquid transfer pipe, an aspirator and a plurality of gun heads, and is characterized by further comprising a mounting plate, a connecting frame, a plurality of connecting pipes and a plurality of valve bodies, wherein the aspirator is arranged on the liquid transfer pipe and used for controlling the liquid transfer pipe to absorb liquid or discharge liquid; the mounting plate is horizontally arranged below the pipette and is connected with the pipette through the connecting frame; the valve bodies are arranged on the mounting plate at equal intervals, and each valve body is communicated with the lower end of the pipette through one connecting pipe; the plurality of the gun heads correspond to the plurality of the valve bodies one by one, and the gun heads are detachably connected to the lower ends of the valve bodies.

2. The pipette holder according to claim 1, wherein the valve body comprises a housing, a cap, a piston, a spring, and a plunger, the housing is provided on the mounting plate, and a stopper slide hole, a taper hole, and a communication hole are provided in the housing in this order from top to bottom; the lower end of the cap is covered at the upper end of the shell, the upper end of the cap is arranged on the connecting pipe, and the cap is provided with a first through hole which is used for communicating the connecting pipe and the limiting slide hole; the piston is arranged in the limiting sliding hole in a vertically sliding manner, a conical surface is arranged between the lower end surface and the outer side surface of the piston, and a second through hole for communicating the conical surface is formed in the upper end surface of the piston; the spring is arranged in the limiting sliding hole and forces the piston to slide downwards, so that the conical surface is contacted with the inner wall of the conical hole to form sealing, and the second through hole and the communicating hole are isolated; an inner threaded hole is formed in the upper end face of the gun head, a limiting hole extends downwards from the lower end of the inner threaded hole, and a third through hole penetrates downwards from the inner bottom face of the limiting hole; the lower end of the ejector rod is provided with a limiting block, the limiting block is arranged in the limiting hole, a fourth through hole is formed in the limiting block, and the fourth through hole is used for communicating the third through hole with the communication hole; when the internal thread hole is in threaded connection with the lower end of the shell, the ejector rod forces the piston to slide upwards, so that the conical surface is separated from the inner wall of the conical hole, and the second through hole is communicated with the communicating hole.

3. A pipette tip according to claim 2, wherein a holding plate is projected radially from an outer wall of the housing, the mounting plate is provided with a mounting hole, the housing is inserted into the mounting hole, and a holding area is formed between the cap and the holding plate, the holding area being capable of clamping the mounting plate.

4. The pipette tip of claim 3 wherein said cap is threadably attached to said housing.

5. The pipette tip according to claim 2, wherein the tapered surface is provided with a seal ring in a circumferential direction thereof, and the seal ring is located below the second through hole.

6. The pipette tip of claim 2 wherein the upper end of the outer side wall of the piston is provided with a receiving groove around its circumferential direction for receiving the lower end of the spring and restricting the movement of the spring in its radial direction.

7. A pipette as in claim 2 wherein said connecting tube is provided with a connector at the end remote from said pipette, said connector being threadably connected to the upper end of said cap.

8. The pipette tip of claim 2 wherein the lower end face of the piston is provided with an extension rod which is arranged coaxially with the top rod.