CN218981623U

CN218981623U - Pipette tube

Info

Publication number: CN218981623U
Application number: CN202223603362.9U
Authority: CN
Inventors: 肖雯
Original assignee: Beijing Transport Tongda Environmental Technology Co ltd
Current assignee: Beijing Transport Tongda Environmental Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-09
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to a pipette belongs to laboratory quantity and gets technical field of instrument, and it includes the pipe body and sets up get the mechanism on the pipe body, get the mechanism include first connecting portion and with the relative second connecting portion that sets up of first connecting portion, first connecting portion with be equipped with between the second connecting portion and connect both deformation piece, first connecting portion lower extreme be equipped with the suction pipe of the inside intercommunication of first connecting portion, the suction pipe peg graft pipe body opening part and with pipe body inside wall butt, just be equipped with on the first connecting portion and be used for controlling deformation piece deformation distance's driving piece. This application has the quick accurate sample of getting, improves the effect of experimental efficiency.

Description

Pipette tube

Technical Field

The application relates to the technical field of laboratory measuring instruments, in particular to a pipette.

Background

The pipette is used as a glassware commonly used in laboratories for measuring liquid, when the glassware is used, a right thumb and a middle finger are used for pinching a place above a pipe neck marking, a left hand is used for slightly sucking a solution, eyes pay attention to the rising liquid level, when the liquid level rises above about 1cm of the marking, a pipe orifice is quickly plugged by a right index finger, the pipette is taken out, and the right index finger is slightly loosened, so that the liquid level slowly descends until a concave liquid level is tangential to the marking, and the liquid quantity required to be measured is obtained.

In the related art, the ear suction ball is used for measuring liquid in a way of being matched with the pipette, excessive sample is required to be sucked into the pipette, and the excessive sample is discharged until the sample in the pipette reaches the accurate required amount, so that the condition of consuming time in the process of measuring the sample is easily caused, and the experimental efficiency is influenced.

Disclosure of Invention

In order to rapidly measure accurate samples and improve experimental efficiency, the application provides a pipette.

The application provides a pipette adopts following technical scheme:

the utility model provides a pipette, is in including pipe body and setting get the mechanism on the pipe body, get the mechanism include first connecting portion and with the second connecting portion that first connecting portion set up relatively, first connecting portion with be equipped with between the second connecting portion and connect the deformation piece of two, first connecting portion lower extreme be equipped with the suction pipe of the inside intercommunication of first connecting portion, the suction pipe peg graft pipe body opening part and with pipe body inside wall butt, just be equipped with on the first connecting portion and be used for controlling the driving piece of deformation piece deformation distance.

Through adopting above-mentioned technical scheme, when using the pipette, be close to each other through driving piece drive first connecting portion and second connecting piece, until deformation piece is compressed to minimum, the air in the cavity that first connecting portion, second connecting portion and deformation piece formed is discharged this moment, peg graft the suction tube in the body of pipe this moment, until suction tube lateral wall and the inside wall butt of body of pipe, drive first connecting portion and second connecting portion through driving piece and keep away from each other again, deformation piece is stretched this moment, when the distance that first connecting portion and second connecting portion kept away from each other makes the volume change of the cavity that first connecting portion, second connecting portion and deformation piece formed correspond with the sample volume that needs to be got, stop driving the removal of first connecting portion and second connecting portion, the sample volume in the suction tube body this moment equals with required sample volume, thereby get accurate sample fast, improve experimental efficiency.

Optionally, the driving piece includes two respectively fixed connection be in the connecting plate on first connecting portion with the second connecting portion, two the connecting plate is all worn to be equipped with the lead screw with one end, one of them the connecting plate with the lead screw rotates to be connected, another the connecting plate with lead screw threaded connection.

Through adopting above-mentioned technical scheme, when driving first connecting portion and second connecting portion and remove, rotate the lead screw, one of them connecting plate and lead screw rotate and are connected this moment, and another connecting plate is moved along the length direction of lead screw under the drive of lead screw to drive first connecting portion and second connecting portion and be close to each other or keep away from, make the volume of the cavity that first connecting portion, second connecting portion and deformation formed evenly change, thereby control the sample volume in the suction tube body, get accurate sample fast, improve experimental efficiency.

Optionally, a connecting rod parallel to the screw rod is arranged at one end of the connecting plate away from the screw rod in a penetrating way, the connecting plate rotationally connected with the screw rod is fixedly connected with the connecting rod, and the other connecting plate is slidingly connected with the connecting rod.

Through adopting above-mentioned technical scheme, when the in-process that one of them connecting plate moved along the length direction of lead screw, the connecting plate other end slides on the connecting rod, and the connecting rod is spacing to the connecting plate this moment to reduce the possibility that the connecting plate squinted at the in-process that removes, thereby make first connecting portion and second connecting portion be in the coplanar all the time, reduce first connecting portion and second connecting portion and take place to deflect and cause deformation damage's possibility, further reach and get accurate sample fast, improve experimental efficiency's effect.

Optionally, the side wall of the connecting rod is provided with scales arranged along the length direction of the connecting rod.

Through adopting above-mentioned technical scheme, when the in-process that one of them connecting plate of screw drive removed, the other end of connecting plate slides on the connecting rod, can accurately observe the distance between first connecting portion and the second connecting portion according to the scale on the connecting rod this moment to be convenient for get accurate sample fast, improve the effect of experimental efficiency.

Optionally, the deformation member is configured as a bellows.

Through adopting above-mentioned technical scheme, when first connecting portion and second connecting portion are close to each other or keep away from, the bellows is along with the removal of first connecting portion and second connecting portion and constantly shrink and stretch to make first connecting portion and second connecting portion pass through suction pipe and external intercommunication all the time, improve the stability that first connecting portion and second connecting portion are connected, reduce the possibility that first connecting portion and second connecting portion junction and external intercommunication, further accurate volume sample, improve experimental efficiency.

Optionally, an end of the suction pipe away from the first connecting portion is cone-shaped.

Through adopting above-mentioned technical scheme, set up the suction pipe tip into coniform so that the volume of suction pipe tip reduces, peg graft the in-process at the pipe body with the suction pipe, the one end of suction pipe coniform gets into the pipe body at first, continues to remove the suction pipe to the direction that is close to the pipe body this moment, and the lateral wall of the slope of suction pipe coniform tip leads to the pipe body this moment to be convenient for suction pipe and pipe body peg graft each other, further improve experimental efficiency.

Optionally, a sealing pad sleeved on the outer side wall of the suction pipe is fixedly connected to the suction pipe.

Through adopting above-mentioned technical scheme, when the suction pipe is pegged graft in the pipe body, sealed pad is located between suction pipe and the pipe body and with pipe body inside wall butt to reduce the suction pipe and peg graft at the in-process of pipe body and take place the skew and cause the possibility that the pipe body damaged, seal the junction with suction pipe and pipe body simultaneously, make and get the mechanism and pipe body all keep away from the one end and the external intercommunication of suction pipe through the pipe body, improve the stability of being connected between suction pipe and the pipe body, thereby further get accurate sample fast, improve experimental efficiency.

Optionally, a connecting piece for connecting the pipe body is arranged at the lower end of the first connecting part.

Through adopting above-mentioned technical scheme, through connecting piece with first connecting portion and pipe body interconnect, increase the area of contact of first connecting portion and pipe body, further improve the stability of first connecting portion to get accurate sample fast, improve experimental efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the pipette is used, the first connecting part and the second connecting part are driven to be close to each other through the driving part until the deformation part is compressed to the minimum, at the moment, air in a cavity formed by the first connecting part, the second connecting part and the deformation part is discharged, the suction pipe is inserted into the pipe body at the moment, until the side wall of the suction pipe is abutted against the inner side wall of the pipe body, the first connecting part and the second connecting part are driven to be far away from each other through the driving part again, at the moment, the deformation part is stretched, and when the distance between the first connecting part and the second connecting part is far away from each other, the volume change of the cavity formed by the first connecting part, the second connecting part and the deformation part corresponds to the volume of a sample to be measured, the movement of the first connecting part and the second connecting part is stopped, at the moment, the sample amount in the suction pipe body is equal to the required sample amount, so that an accurate sample is measured rapidly, and the experimental efficiency is improved;

2. when one of the connecting plates moves along the length direction of the screw rod, the other end of the connecting plate slides on the connecting rod, and at the moment, the connecting rod limits the connecting plate, so that the possibility of deflection of the connecting plate in the moving process is reduced, the first connecting part and the second connecting part are always positioned in the same plane, the possibility of deformation damage caused by deflection of the first connecting part and the second connecting part is reduced, and the effects of rapidly measuring an accurate sample and improving experimental efficiency are further achieved;

3. when first connecting portion and second connecting portion are close to each other or keep away from, the bellows is along with the removal of first connecting portion and second connecting portion and constantly shrink and stretch to make first connecting portion and second connecting portion pass through suction pipe and external intercommunication all the time, improve the stability that first connecting portion and second connecting portion are connected, reduce the possibility that first connecting portion and second connecting portion junction and external intercommunication, further accurate measuring sample improves experimental efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of a pipette in an embodiment of the present application.

Fig. 2 is a schematic structural diagram showing a positional relationship between the first connecting portion and the connecting member in the embodiment of the present application.

Fig. 3 is a schematic structural diagram showing the positional relationship between the deformation member and the driving member in the embodiment of the present application.

Reference numerals illustrate: 1. a tube body; 2. a measuring mechanism; 21. a first connection portion; 211. a suction pipe; 212. a sealing gasket; 22. a second connecting portion; 23. a deformation member; 231. a bellows; 24. a driving member; 241. a connecting plate; 242. a screw rod; 243. a rotating disc; 244. a connecting rod; 25. a connecting piece; 251. a first annular plate; 252. a second annular plate; 253. a rotating lever; 254. and a fixing plate.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

Embodiments of the present application disclose a pipette. Referring to fig. 1 and 2, a pipette includes a vertical tube body 1, one end of the tube body 1 is provided in a cone shape, and the other end is provided with a measuring mechanism 2 for accurately measuring a liquid. The measuring mechanism 2 comprises a first connecting portion 21 located above the pipe body 1, one end, close to the pipe body 1, of the first connecting portion 21 is fixedly connected with a suction pipe 211 communicated with the inside of the first connecting portion 21, one end, far away from the first connecting portion 21, of the suction pipe 211 is arranged into a cone shape, the outer diameter of one end, close to the first connecting portion 21, of the suction pipe 211 is equal to the inner diameter of the pipe body 1, and the suction pipe 211 is inserted into the pipe body 1.

The first connecting portion 21 one end is equipped with the second connecting portion 22 that sets up relatively with first connecting portion 21, and first connecting portion 21 and second connecting portion 22 are located same horizontal plane, are equipped with the deformation piece 23 of connecting both between first connecting portion 21 and the second connecting portion 22, set up to square bellows 231 in this embodiment, the one end that first connecting portion 21 and second connecting portion 22 are close to each other all with bellows 231 fixed connection. A driving member 24 for connecting the first connecting portion 21 and the second connecting portion 22 is provided between them, and a connecting member 25 for connecting the tube body 1 is provided at one end of the first connecting portion 21 near the suction tube 211.

When the pipette is used, the first connecting part 21 and the second connecting part 25 are driven to be close to each other through the driving part 24 until the corrugated pipe 231 is compressed to the minimum, at the moment, air in a cavity formed by the first connecting part 21, the second connecting part 22 and the corrugated pipe 231 is discharged, at the moment, the suction pipe 211 is inserted into the pipe body 1 until the side wall of the suction pipe 211 is abutted against the inner side wall of the pipe body 1, the first connecting part 21 and the pipe body 1 are connected with each other through the connecting part 25, the first connecting part 21 and the second connecting part 22 are driven to be far away from each other through the driving part 24 again, at the moment, the corrugated pipe 231 is stretched, and when the volume change of a cavity formed by the first connecting part 21, the second connecting part 22 and the corrugated pipe 231 corresponds to the volume of a sample to be measured, at the moment, the movement of the first connecting part 21 and the second connecting part 22 is stopped, at the moment, the sample amount in the suction pipe body 1 is equal to the required sample amount, and the sample measurement is completed.

The bellows 231 continuously contracts and stretches along with the movement of the first connecting portion 21 and the second connecting portion 22, so that the first connecting portion 21 and the second connecting portion 22 are always communicated with the outside through the suction pipe 211, the stability of connection of the first connecting portion 21 and the second connecting portion 22 is improved, the end portion of the suction pipe 211 is arranged into a cone shape, the volume of the end portion of the suction pipe 211 is reduced, the suction pipe 211 is inserted into the pipe body 1, one conical end of the suction pipe 211 firstly enters the pipe body 1, at the moment, the suction pipe 211 is continuously moved towards the direction close to the pipe body 1, and the inclined side wall of the end portion of the suction pipe 211 guides the pipe body 1, so that the suction pipe 211 and the pipe body 1 are conveniently inserted into each other.

Referring to fig. 1 and 3, the driving member 24 includes horizontal connection plates 241 symmetrically disposed at one sides of the first connection part 21 and the second connection part 22 away from each other, the connection plates 241 are T-shaped, the first connection part 21 and the second connection part 22 are fixedly connected with one side of the connection plates 241 having a small width, the same horizontal screw rods 242 are respectively disposed at the same ends of the two connection plates 241, the connection plates 241 disposed on the first connection part 21 are rotatably connected with the screw rods 242, the connection plates 241 disposed on the second connection part 22 are in threaded connection with the screw rods 242, and one end of the screw rods 242 close to the first connection part 21 is fixedly connected with a rotation disc 243 for rotating the screw rods 242.

The connecting rod 244 of same level is all worn to be equipped with to the one end that connecting plate 241 kept away from lead screw 242, and connecting plate 241 and connecting rod 244 fixed connection that is located on first connecting portion 21 are located connecting plate 241 and connecting rod 244 sliding connection on the second connecting portion 22, and connecting rod 244 upside is equipped with the scale that sets up along connecting rod 244 length direction.

When the first connecting part 21 and the second connecting part 22 are driven to move, the screw 242 is rotated, at this time, the connecting plate 241 on the first connecting part 21 is rotationally connected with the screw 242, the connecting plate 241 on the second connecting part 22 is driven by the screw 242 to move along the length direction of the screw 242, and the first connecting part 21 and the second connecting part 22 are driven to approach or separate from each other, so that the volume of the cavity formed by the first connecting part 21, the second connecting part 22 and the bellows 231 is uniformly changed, and the sample amount in the suction tube body 1 is controlled.

When the connecting plate 241 on the second connecting portion 22 moves along the length direction of the screw rod 242, the other end of the connecting plate 241 on the second connecting portion 22 slides on the connecting rod 244, and at this time, the connecting rod 244 limits the connecting plate 241, so that the possibility of deflection of the connecting plate 241 in the moving process is reduced, the possibility of damage to the deformation piece 23 caused by deflection of the first connecting portion 21 and the second connecting portion 22 is further reduced, meanwhile, the distance between the first connecting portion 21 and the second connecting portion 22 is accurately observed according to the scale on the connecting rod 244, and accurate samples are conveniently and rapidly measured.

Referring to fig. 1 and 2, the connector 25 includes a first annular plate 251 and a second annular plate 252 symmetrically disposed at both sides of the tube body 1 near one end of the first connector 21, one end of the first connector 21 near the suction tube 211 is fixedly connected with a vertical rotating rod 253, the same ends of the first annular plate 251 and the second annular plate 252 are both sleeved on the rotating rod 253 and are rotatably connected with the rotating rod 253, and one ends of the first annular plate 251 and the second annular plate 252 far away from the rotating rod 253 are both fixedly connected with a fixing plate 254 and the two fixing plates 254 are fixed by bolts. When the first annular plate 251 and the second annular plate 252 are fixed by the fixing plate 254 and the bolts, both sides of the first annular plate 251 and the second annular plate 252 which are close to each other are abutted against the side wall of the pipe body 1.

When the first connecting portion 21 and the tube body 1 are connected, the suction tube 211 is inserted into the tube body 1, the first annular plate 251 and the second annular plate 252 are rotated in the directions approaching each other until one side of the first annular plate 251 and the second annular plate 252 approaching each other is abutted against the side wall of the tube body 1, at this time, the two fixing plates 254 are abutted against each other, and the fixing plates 254 are fixed by bolts, so that the first connecting portion 21 is connected with the tube body 1 through the first annular plate 251 and the second annular plate 252, the contact area between the first connecting portion 21 and the tube body 1 is increased, and the connection stability between the first connecting portion 21 and the tube body 1 is improved.

In order to improve the stability of the connection between the suction pipe 211 and the pipe body 1, a sealing pad 212 sleeved on the outer side wall of the suction pipe 211 is fixedly connected to the suction pipe 211, and when the suction pipe 211 is inserted into the pipe body 1, one side, away from the suction pipe 211, of the sealing pad 212 is abutted against the inner side wall of the pipe body 1.

When the suction pipe 211 is inserted into the pipe body 1, the sealing gasket 212 is positioned between the suction pipe 211 and the pipe body 1 and is abutted against the inner side wall of the pipe body 1, the possibility that the suction pipe 211 is deviated and damaged by the pipe body 1 in the process of being inserted into the pipe body 1 is reduced, and meanwhile, the joint of the suction pipe 211 and the pipe body 1 is sealed, so that the measuring mechanism 2 and the pipe body 1 are communicated with the outside through the pipe body 1 at one end, far away from the suction pipe 211, and the stability of connection between the suction pipe 211 and the pipe body 1 is improved.

The implementation principle of the pipette in the embodiment of the application is as follows: when the pipette is used, the screw 242 is rotated to drive the first connecting part 21 and the second connecting part 25 to be close to each other until the corrugated pipe 231 is compressed to the minimum, at this time, air in the cavity formed by the first connecting part 21, the second connecting part 22 and the corrugated pipe 231 is discharged, at this time, the suction pipe 211 is inserted into the pipe body 1 until the side wall of the suction pipe 211 is abutted with the inner side wall of the pipe body 1, the first annular plate 251 and the second annular plate 252 are rotated to be close to each other, and are fixed by bolts, so that the first connecting part 21 and the pipe body 1 are connected with each other, the screw 242 is rotated again to drive the first connecting part 21 and the second connecting part 22 to be far away from each other, at this time, the corrugated pipe 231 is stretched, and when the volume change of the cavity formed by the first connecting part 21, the second connecting part 22 and the corrugated pipe 231 is opposite to the volume of the sample to be measured, at this time, the movement of the first connecting part 21 and the second connecting part 22 is stopped, the sample amount in the suction pipe body 1 is equal to the required sample amount, and the sample is measured.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A pipette, characterized in that: including pipe body (1) and setting are in get mechanism (2) on pipe body (1), get mechanism (2) include first connecting portion (21) and with second connecting portion (22) that first connecting portion (21) set up relatively, first connecting portion (21) with be equipped with between second connecting portion (22) and connect deformation piece (23) between them, first connecting portion (21) lower extreme be equipped with suction pipe (211) of the inside intercommunication of first connecting portion (21), suction pipe (211) peg graft pipe body (1) opening part and with pipe body (1) inside wall butt, just be equipped with on first connecting portion (21) be used for controlling deformation piece (23) deformation distance's driving piece (24).

2. A pipette as defined in claim 1, wherein: the driving piece (24) comprises two connecting plates (241) which are respectively and fixedly connected to the first connecting part (21) and the second connecting part (22), screw rods (242) are respectively arranged at the same ends of the two connecting plates (241) in a penetrating mode, one connecting plate (241) is rotationally connected with the screw rods (242), and the other connecting plate (241) is in threaded connection with the screw rods (242).

3. A pipette as defined in claim 2, wherein: one end of the connecting plate (241) far away from the screw rod (242) is provided with a connecting rod (244) in a penetrating way, the connecting plate (241) rotationally connected with the screw rod (242) is fixedly connected with the connecting rod (244), and the other connecting plate (241) is in sliding connection with the connecting rod (244).

4. A pipette as defined in claim 3 wherein: the side wall of the connecting rod (244) is provided with scales arranged along the length direction of the connecting rod (244).

5. A pipette as recited in claim 4 wherein: the deformation member (23) is provided as a bellows (231).

6. A pipette as recited in claim 5 wherein: the end of the suction pipe (211) far away from the first connecting part (21) is arranged in a cone shape.

7. A pipette as defined in claim 6, wherein: the suction pipe (211) is fixedly connected with a sealing gasket (212) sleeved on the outer side wall of the suction pipe (211).

8. A pipette as defined in claim 7 wherein: the lower end of the first connecting part (21) is provided with a connecting piece (25) for connecting the pipe body (1).