CN217796199U

CN217796199U - Backflow prevention device for pipette

Info

Publication number: CN217796199U
Application number: CN202222238645.1U
Authority: CN
Inventors: 马育硕; 赵霞; 卞海艳
Original assignee: Affiliated Hospital of University of Qingdao
Current assignee: Affiliated Hospital of University of Qingdao
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-11-15
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a flowing backwards preventing device is prevented to pipetting gun belongs to pipetting gun technical field, including the pipetting gun body, the pipetting gun body is including holding the liquid pipe, and the top of holding the liquid pipe is provided with presses the suction head, and the bottom of holding the liquid pipe is provided with the pipetting gun head, and the front of holding the liquid pipe is provided with the meter, and the bottom of pipetting gun head is provided with prevents the flowing backwards subassembly, prevents the flowing backwards subassembly and includes a screw section of thick bamboo, the utility model discloses during the use, hold the liquid pipe through the setting, press the suction head, pipetting gun head and meter can construct the pipetting gun body jointly, through setting up a screw section of thick bamboo, prevent flowing backwards net and through-hole, can effectually hold back the liquid that assembles into the drippage on the pipetting gun head inner wall and hold back to avoid liquid to flow backwards to other places, thereby ensured people's safety, also guaranteed preventing down of pipetting, through setting up above structure, possess the pipetting gun body when using, can improve the advantage of flowing backwards effect, thereby can satisfy customer's demand.

Description

Backflow prevention device for liquid-transfering gun

Technical Field

The utility model relates to a liquid-transfering gun technical field specifically is liquid-transfering gun anti-backflow device.

Background

In the fields of medical treatment, medicine, gene and protein research, biological research, medicine development laboratories and other biotechnology application, it is often necessary to manipulate laboratory samples in various laboratory protocols using a pipette, which uses a pipette to draw a volume of liquid into the pipette and then dispense the liquid into one or more dispense volumes, and thus, pipette is widely used in laboratories, wherein the prior patent No. CN210303721U discloses a pipette comprising a pipette body 1, a pipette tip 2 and a liquid storage cavity 3 disposed in the pipette body 1, and further comprising a backflow prevention device 4; a communicating interface 5 is arranged on the pipette body 1, one end of the communicating interface 5 is connected with the liquid storage cavity 3, and the other end is communicated with the pipette head 2; the backflow prevention device 4 is arranged on the inner wall of the liquid transfer gun head 2 in a surrounding mode, and the backflow prevention device 4 is arranged on the inner wall of the liquid transfer gun head 2 in a surrounding mode, so that residual liquid on the inner wall of the liquid transfer gun head 2 can be effectively intercepted, the residual liquid is prevented from dripping to other places due to insufficient suction force or backflow, and the purposes of protecting human body safety or guaranteeing the cleanness of an experimental environment are achieved; but above-mentioned patent only can hold back the remaining liquid of 2 inner walls of pipette tip, when remaining liquid assembles into the liquid drop, then can't hold back it, so there is the relatively poor defect of anti-backflow effect to can't satisfy customer's demand, consequently, the utility model provides a backflow device is prevented to the pipette to solve the above-mentioned problem that proposes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flowing back prevention device is prevented to liquid-transfering gun possesses the liquid-transfering gun body when using, can improve the advantage of preventing the effect of flowing back, has solved original liquid-transfering gun body when using, prevents the relatively poor problem of effect of flowing back.

In order to achieve the above object, the utility model provides a following technical scheme:

pipetting gun prevents flow reversal device, including the pipetting gun body, the pipetting gun body is including holding the liquid pipe, the top of holding the liquid pipe is provided with presses the suction head, the bottom of holding the liquid pipe is provided with the pipetting gun head, the front of holding the liquid pipe is provided with the measurement meter, the bottom of pipetting gun head is provided with prevents the backflow subassembly, prevent that the backflow subassembly includes a screw thread section of thick bamboo, the internal surface of screw thread section of thick bamboo and the junction threaded connection of pipetting gun head, the bottom of screw thread section of thick bamboo inner chamber is provided with prevents the backflow net, the through-hole that uses with the cooperation of pipetting gun head is seted up to the bottom of screw thread section of thick bamboo.

As a further aspect of the present invention, the internal thread is provided on the internal surface of the thread cylinder, the external bolt is provided on the external surface of the pipette head, and the external thread is connected to the internal thread.

As the utility model discloses scheme further still, the top that holds the liquid outside of tubes surface is provided with the antiskid cover, antiskid cover and the junction bonding that holds between the liquid pipe.

As a further proposal of the utility model, the threaded cylinder and the backflow prevention net are made of COC material.

As the utility model discloses scheme further again, prevent that the backflow net is circular, prevent that the surface of backflow net closely laminates with the junction of screw thread section of thick bamboo and liquid-transfering gun head respectively.

As the utility model discloses further scheme again, the through-hole is circular, the antiskid cover is the silicon rubber material.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses during the use, hold the liquid pipe through the setting, press the suction head, pipette head and measurement meter, can construct the pipette body jointly, through setting up a thread section of thick bamboo, prevent backflow net and through-hole, can effectually assemble into the liquid that drips on the pipette head inner wall and hold back, thereby avoid liquid to flow back to other places, thereby people's safety has been ensured, the clean and tidy of moving the liquid has also been guaranteed, through setting up above structure, possess the pipette body when using, can improve the advantage of preventing the backflow effect, solved original pipette body when using, prevent the relatively poor problem of backflow effect, thereby can satisfy customer's demand.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure of FIG. 1 according to the present invention at A;

FIG. 3 is a perspective view of the threaded cylinder structure of the present invention;

fig. 4 is a front view of the threaded cylinder structure of the present invention.

In the figure: 1. a pipette body; 101. a liquid storage tube; 102. pressing the suction head; 103. a pipette tip; 104. measuring a meter; 2. a backflow prevention assembly; 201. a threaded barrel; 202. a backflow prevention net; 203. a through hole; 3. an anti-slip sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

referring to fig. 1 to 4, in an embodiment of the present invention, a backflow prevention device for a pipette comprises a pipette body 1, the pipette body 1 includes a liquid storage tube 101, a pressing suction head 102 is disposed on a top of the liquid storage tube 101, by the design of the pressing suction head 102, when liquid needs to be sucked, only the pressing suction head 102 needs to be pressed downward to discharge air in the pressing suction head 102, liquid can be conveniently sucked by using pressure difference, a pipette tip 103 is disposed on a bottom of the liquid storage tube 101, a connection between the pipette tip 103 and the liquid storage tube 101 is screwed, so that the pipette tip 103 can be conveniently replaced, the pipette tip 103 can be a disposable product, a meter 104 is disposed on a front surface of the liquid storage tube 101, the liquid in the liquid storage tube 101 can be monitored by the meter 104, the required liquid can be sucked as needed, the amount of liquid can be conveniently controlled, a backflow prevention assembly 2 is disposed on a bottom of the pipette tip 103, the backflow prevention assembly 2 can be repeatedly cleaned and used, the backflow prevention assembly 2 comprises a threaded cylinder 201, the inner surface of the threaded cylinder 201 is in threaded connection with the connection position of the pipette tip 103, a backflow prevention net 202 is arranged at the bottom of the inner cavity of the threaded cylinder 201, a through hole 203 matched with the pipette tip 103 for use is formed in the bottom of the threaded cylinder 201, an internal thread is formed in the inner surface of the threaded cylinder 201, an external bolt is formed in the outer surface of the pipette tip 103, the external thread is in threaded connection with the internal thread, the connection position between the threaded cylinder 201 and the pipette tip 103 can be conveniently installed by arranging the internal thread and the external bolt, an anti-slip sleeve 3 is arranged at the top of the outer surface of the liquid storage tube 101, the anti-slip sleeve 3 is bonded with the connection position between the liquid storage tube 101, the friction of the liquid transfer gun body 1 can be increased by arranging the anti-slip sleeve 3, and the backflow prevention net 202 are both made of COC materials, in the in-service use in-process, the screw cylinder 201 and the net 202 that prevents flowing backwards also can be replaced with other materials, it is all the utility model discloses an within the scope of protection, prevent flowing backwards net 202 for circular, prevent flowing backwards net 202's surface closely laminating with the junction of screw cylinder 201 and pipetting gun head 103 respectively, through-hole 203 is circular, antiskid cover 3 is the silicon rubber material, 3 be the silicon rubber material through setting up antiskid cover, silicon rubber indicates that the main chain comprises silicon and oxygen atom in turn, even there are two organic radicals's rubber on the silicon atom usually, the material characteristic: the anti-skid sleeve has the advantages of being non-toxic, environment-friendly, physiologically inert, ultraviolet-resistant, ozone-resistant, stamping-resistant, acid-base-resistant, wear-resistant, flame-retardant, voltage-resistant, conductive and the like, and can improve the anti-skid performance of the anti-skid sleeve 3.

The principle of the embodiment is as follows:

during the use, to prevent that refluence net 202 places the bottom in screw thread section of thick bamboo 201 inner chamber, then, screw thread section of thick bamboo 201 is rotated, make the cooperation of external screw thread and internal surface use, with screw thread section of thick bamboo 201 and pipetting gun head 103 threaded connection, thereby accomplish the installation to preventing refluence net 202, then, when inserting pipetting gun head 103 in the liquid and drive the liquid again, prevent that refluence subassembly 2 submerges in the liquid, at this moment, only need to press down suction head 102, exhaust air that both can be quick, thereby absorb liquid, and the volume of liquid can be measured in the setting of survey meter 104, when needing to shift liquid and test, current pipetting gun head 103 inner wall can lead to remaining liquid in the pipetting gun head 103 to drip to ground or desk because of the not enough tension condition of liquid level, cause pollution and waste, even corrosive liquid still can cause the injury to the human body, and through preventing refluence subassembly 2's setting, can be so that prevent forming one liquid level between refluence net 202 and the liquid, thereby the effect of playing, avoid refluence liquid to drip, the device is easy to operate, convenient to use, thereby customer's demand can be satisfied.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The backflow prevention device of the pipette comprises a pipette body (1) and is characterized in that the pipette body (1) comprises a liquid storage pipe (101), the top of the liquid storage pipe (101) is provided with a pressing suction head (102), the bottom of the liquid storage pipe (101) is provided with a pipette head (103), the front side of the liquid storage pipe (101) is provided with a measuring meter (104), the bottom of the pipette head (103) is provided with a backflow prevention assembly (2), the backflow prevention assembly (2) comprises a threaded cylinder (201), the inner surface of the threaded cylinder (201) is in threaded connection with the connection of the pipette head (103), a backflow prevention net (202) is arranged at the bottom of the inner cavity of the threaded cylinder (201), and a through hole (203) matched with the pipette head (103) for use is formed in the bottom of the threaded cylinder (201).

2. The backflow prevention device for the pipette gun according to claim 1, wherein the inner surface of the thread cylinder (201) is provided with internal threads, the outer surface of the pipette gun head (103) is provided with an external bolt, and the external threads are in threaded connection with the internal threads.

3. The backflow prevention device for the pipette gun according to claim 1, wherein an anti-slip sleeve (3) is arranged on the top of the outer surface of the liquid storage tube (101), and the joint between the anti-slip sleeve (3) and the liquid storage tube (101) is bonded.

4. The backflow prevention device of a pipette gun according to claim 1, wherein the threaded barrel (201) and the backflow prevention mesh (202) are made of COC material.

5. The backflow prevention device for the pipette gun according to claim 1, wherein the backflow prevention net (202) is circular, and the outer surface of the backflow prevention net (202) is tightly attached to the joint of the threaded cylinder (201) and the pipette head (103).

6. The backflow prevention device of a pipette gun according to claim 3, wherein the through hole (203) is circular, and the anti-slip sleeve (3) is made of silicon rubber.