CN111744567B

CN111744567B - Liquid-transfering gun for laboratory

Info

Publication number: CN111744567B
Application number: CN202010587140.9A
Authority: CN
Inventors: 巨爱宁; 燕丕宏; 封建凯; 王莉莉; 刘海舟
Original assignee: Ju Aining
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-03-30
Anticipated expiration: 2040-06-24
Also published as: GB202101333D0; CN111744567A; GB2588564A

Abstract

The utility model provides a laboratory uses pipetting gun, includes the rifle body, fixed connection is at the hand protector of rifle body upper end lateral wall, rifle body upper surface can be dismantled and be linked there is the rifle lid, spacing groove has been seted up to rifle body upper surface, the ninety degree interval circumference of spacing groove along the internal cavity wall of rifle distributes, the fixed stopper that is provided with down triangle-shaped of rifle lid lateral wall, stopper and spacing groove cooperation, the sliding chamber has been seted up on the rifle lid, sliding chamber sliding connection has the slide bar in the sliding chamber, the slide bar upper surface is fixed to be provided with presses the piece, press the piece upper surface to be the cross slot face, the scale groove has been seted up to rifle body lower extreme lateral wall, the scale inslot is equipped with rotatable calibrated scale, rifle body bottom can be dismantled and link there is the adapter sleeve, adapter sleeve lower extreme mateable connection filter core.

Description

Liquid-transfering gun for laboratory

Technical Field

The invention relates to the technical field of medical instruments, in particular to a liquid-transferring gun for a laboratory.

Background

Liquid-transfering gun and pipette are the indispensable instrument and equipment of disease control center and hospital's assay branch of academic or vocational study when carrying out sample pipetting operation, and the liquid-transfering gun can insert the rifle head into the container of required liquid-transfering and absorb liquid at the in-process liquid-transfering gun that carries out liquid-transfering operation, because its acid-base of the liquid of absorption then can cause the corruption of liquid-transfering gun head, removable rifle head such as filter core suction head has appeared on this market, but at the in-process of absorbing liquid, because the effort of its liquid-transfering gun internal spring can follow the internal rifle that the liquid-transfering gun was shot at the liquid-transfering gun of in-process liquid absorption, not only can corrode the internal part of rifle of liquid-transfering gun like this and fall still can cause the liquid precision of absorption inaccurate, thereby cause economic.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a pipette for a laboratory, which can prevent the sucked liquid from flowing into a gun body and effectively improve the precision of the pipette, and reduces the economic loss.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a laboratory is with liquid-transfering gun, includes the rifle body, fixed connection is at the hand protector of rifle body upper end lateral wall, a serial communication port, rifle body upper surface can be dismantled and the linking has the rifle lid, the spacing groove has been seted up to rifle body upper surface, the ninety degree interval circumference distribution of chamber wall in the spacing groove edge rifle body, rifle lid fixed surface is provided with down triangular stopper down, stopper and spacing groove cooperation, the sliding chamber has been seted up on the rifle lid, sliding chamber sliding connection has the slide bar, slide bar upper surface is fixed and is provided with presses the piece, it is the cross slot face to press the piece upper surface, the scale groove has been seted up to rifle body lower extreme lateral wall, the scale inslot is equipped with rotatable calibrated scale, rifle body bottom can be dismantled and link there is the adapter sleeve, adapter sleeve lower extreme mateable connection filter core suction head.

Slide bar lower extreme fixedly connected with rotor, the rotor lower extreme rotates and is connected with the compression board, the rotation groove has been seted up to compression board upper surface, compression board lateral wall fixedly connected with increased pressure plate, compression board lower extreme fixedly connected with transfer line, transfer line lower surface fixedly connected with stripper plate, the stripper plate lateral wall can be dismantled and be connected with the rubber sleeve, the transfer line lower extreme rotates and is connected with the stop collar, the stop collar surface is the helical tooth, stop collar and calibrated scale cooperation, the calibrated scale includes hundred microlitres calibrated scales, ten microlitres calibrated scales, each microlitres calibrated scale.

The internal support section of thick bamboo that can dismantle of rifle is provided with, the support section of thick bamboo is located the calibrated scale upper surface, support section of thick bamboo upper surface fixed connection has last backup pad, go up backup pad upper surface and rifle lid lower surface contact, support section of thick bamboo lower surface fixed connection has the bottom suspension fagging, the rectangle through-hole has been seted up to support section of thick bamboo lateral wall symmetry, increased pressure plate sliding connection is in the rectangle through-hole, increased pressure plate and bottom suspension fagging are by spring coupling.

The fixed backward flow board that is provided with in connection cover left side wall upper end, the backward flow board is semi-circular hang plate, the fixed backward flow baffle that is provided with in connection cover right side wall upper end, the semi-circular hang plate of backward flow baffle, the fixed baffle that is provided with in backward flow baffle front end, the baffle is thirty-five degrees contained angles with the backward flow baffle, the backward flow baffle is located backward flow board upper end, backward flow baffle and baffle joint edge are parallel with backward flow board and adapter sleeve joint edge, the fixed guide plate that is provided with the rectangle of adapter sleeve inner wall lower extreme, both sides and adapter sleeve fixed connection around the guide plate, the guide plate is located under the backward flow board, the guide plate is seventy-five degree angle with the adapter sleeve lateral wall, guide plate right.

In summary, the invention has the following advantages: this equipment structure is simple, and convenient operation has effectively prevented that move the liquid backward flow and has irritated the liquid-transfering gun itself, the effectual precision that improves liquid-transfering gun itself, has reduced economic loss.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a perspective view of fig. 2 taken in section a-a.

Fig. 4 is an enlarged view at Q in fig. 3.

Fig. 5 is an enlarged view of fig. 3 at W.

Detailed description of the preferred embodiments

A pipette for a laboratory, which comprises a gun body 1 and a hand guard 3 fixedly connected with the side wall of the upper end of the gun body 1, it is characterized in that the upper surface of the gun body 1 is detachably connected with a gun cover 2, the upper surface of the gun body 1 is provided with a limit groove 111, the limiting grooves 111 are circumferentially distributed along the wall of the inner cavity of the gun body 1 at intervals of ninety degrees, the lower surface of the gun cover 2 is fixedly provided with an inverted triangular limiting block 211, the limit block 211 is matched with the limit groove 111, the gun cover 2 is provided with a sliding cavity 212, a sliding rod 6 is connected in the sliding cavity 212 in a sliding way, a pressing block 5 is fixedly arranged on the upper surface of the sliding rod 6, the upper surface of the pressing block 5 is a transverse groove surface, the side wall of the lower end of the gun body 1 is provided with a scale groove 7, a rotatable dial 8 is arranged in the scale groove 7, the bottom end of the gun body 1 is detachably and fixedly connected with a connecting sleeve 4, and the lower end of the connecting sleeve 4 can be connected with a filter element sucker in a matching manner; when in use, the liquid-transferring gun body 1 is held by hands, the filter element hair-washing arranged on the connecting sleeve 4 is deeply inserted into the liquid-feeding body, the pressing block 5 is pressed, and the sliding rod 6 is pressed down by the pressing block 5; the setting of hand protector 3 can prevent to drop when liquid-transfering gun uses, and makes things convenient for the couple arrangement after the use, press the cross slot face on the movable block 5 increase with the frictional force of finger to prevented to make the liquid that absorbs up reach required liquid content because of pressing unstably, caused the liquid-transfering failure, slide cavity 212 has guaranteed that slide bar 6 can slide from top to bottom perpendicularly.

6 lower extreme fixedly connected with rotor 8 of slide bar, 8 lower extremes of rotor rotate and are connected with compression board 9, rotation groove 911 has been seted up to compression board 9 upper surface, compression board 9 lateral wall fixedly connected with increased pressure plate 912, 9 lower extreme fixedly connected with transfer line 10 of compression board, the fixed surface extrusion dish 11 of transfer line 10 lower surface, extrusion dish 11 lateral wall can be dismantled and is connected with rubber sleeve 112, transfer line 10 lower extreme rotates and is connected with stop collar 12, the 12 surfaces of stop collar are the helical tooth, stop collar 12 and calibrated scale 8 cooperation, calibrated scale 8 includes hundred microlitres calibrated scale 811, ten microlitres calibrated scale 812, each microlitres 813 calibrated scale. Before pipetting, the height of a limiting sleeve 12 is adjusted through a dial 8 so as to determine the content of the pipetted liquid, a downward-pressed sliding rod 6 presses a compression plate 9 downward so as to press a transmission rod 10 at the lower end of the compression plate 9 downward, and the transmission rod 10 drives an extrusion disc 11 to extrude air below the extrusion disc 11; the connection mode of the rotating ball 8 and the rotating groove 911 prevents the rotation in the process of pressing the sliding rod 6 down to cause the deterioration of the sealing performance of the extrusion disc 11, so that the volume of the liquid sucked up does not reach the standard, and the precision of the liquid-transferring gun is inaccurate.

A supporting cylinder 13 is detachably arranged in the gun body 1, the supporting cylinder 13 is positioned on the upper surface of the dial 8, the upper surface of the supporting cylinder 13 is fixedly connected with an upper supporting plate 131, the upper surface of the upper supporting plate 131 is in contact with the lower surface of the gun cover 2, the lower surface of the supporting cylinder 13 is fixedly connected with a lower supporting plate 132, rectangular through holes 133 are symmetrically formed in the side wall of the supporting cylinder 13, the pressurizing plate 912 is slidably connected in the rectangular through holes 133, and the pressurizing plate 912 and the lower supporting plate 132 are connected through springs 14; meanwhile, the pressing plate 912 presses the spring 14 in the pressing process, and the lower surface of the pressing plate 912 is stopped on the upper surface of the fiber sleeve 12, so that the downward pressing action of the liquid transfer is completed, then the pressing of the pressing block 5 is released, the pressing block 912 is reset under the elastic force of the spring, the reset pressing block 912 drives the pressing disc 11 to reset through the transmission rod 10, so that the liquid is sucked along the suction head of the filter element under the action of the atmospheric pressure, and the liquid transfer action is completed.

Fixed backward flow board 411 that is provided with in left sidewall upper end in the adapter sleeve 4, backward flow board 411 is semi-circular inclined plate, fixed backward flow baffle 412 that is provided with in right sidewall upper end in the adapter sleeve 4, the semi-circular inclined plate of backward flow baffle 412, the fixed baffle 413 that is provided with of backward flow baffle 412 front end, baffle 413 is thirty five degrees contained angles with backward flow baffle 412, backward flow baffle 412 is located backward flow board 411 upper end, backward flow baffle 412 and baffle 413 joint limit are parallel with backward flow board 411 and adapter sleeve 4 joint limit, the fixed guide plate 414 that is provided with the rectangle of adapter sleeve 4 inner wall lower extreme, both sides and adapter sleeve 4 fixed connection around guide plate 414, guide plate 414 is located backward flow board 411, guide plate 414 is seventy five degrees angles with adapter sleeve 4 lateral wall, guide plate 414 right side wall and adapter sleeve 4 form water conservancy diversion through-hole 415. In the resetting process, liquid sucked along the suction head of the filter element is sprayed on the lower surface of the backflow plate 411 and flows into the upper surface of the guide plate 414 along the lower surface of the backflow plate 411, finally flows back into the suction head of the filter element through the guide through hole 415 at the right side of the guide plate 414, liquid sprayed out of the guide through hole 415 is sprayed on the lower surface of the backflow baffle 412, the sprayed liquid impacts the baffle 413 to be remained on the upper surface of the backflow plate 411, then flows to the upper surface of the guide plate 414 through the upper surface of the backflow plate 411, and finally flows back into the suction head of the filter element through the guide through hole; the backward flow board 411 has blocked in the required liquid removal flows into the liquid removal rifle body 1, from preventing that liquid from causing the corruption to the part in the rifle body 1, influences the precision of liquid removal rifle, the cooperation of backward flow baffle 412 and baffle 413 prevents that liquid from entering into the rifle body 1 by the adapter sleeve 4 right side, and the required precision of moving the liquid that moves is guaranteed in the guide plate 414 makes the liquid that sprays to backward flow board 411 flow back to the filter core suction head, adapter sleeve 4 can be dismantled with the rifle body 1 and be connected, and the change after the adapter sleeve corruption damage of being convenient for reduces economic loss.

Claims

1. The utility model provides a laboratory is with liquid-transfering gun, includes the rifle body (1), hand protector (3) of fixed connection at the lateral wall of rifle body (1) upper end, its characterized in that, rifle body (1) upper surface can be dismantled and link to have rifle lid (2), spacing groove (111) have been seted up to rifle body (1) upper surface, spacing groove (111) are along ninety degrees interval circumference distribution of the internal cavity wall of rifle body (1), rifle lid (2) lower fixed surface is provided with stopper (211) of falling triangle-shaped, stopper (211) and spacing groove (111) cooperation, slide chamber (212) have been seted up on rifle lid (2), sliding connection has slide bar (6) in slide chamber (212), slide bar (6) upper fixed surface is provided with presses piece (5), it is the cross slot face to press piece (5) upper surface, scale groove (7) have been seted up to rifle body (1) lower extreme lateral wall, the utility model discloses a filter gun, including scale groove (7), be equipped with rotatable calibrated scale (8) in the scale groove (7), the rifle body (1) bottom can be dismantled to link and has connect adapter sleeve (4), adapter sleeve (4) lower extreme mateable connection filter core suction head, left side wall upper end is fixed in adapter sleeve (4) is provided with backward flow board (411), backward flow board (411) are semi-circular hang plate, right side wall upper end is fixed in adapter sleeve (4) is provided with backward flow baffle (412), backward flow baffle (412) semi-circular hang plate, backward flow baffle (412) front end is fixed and is provided with baffle (413), baffle (413) and backward flow baffle (412) are thirty-five degrees contained angles, backward flow baffle (412) are located backward flow board (411) upper end, backward flow baffle (412) and baffle (413) joint edge are parallel with backward flow board (411) and adapter sleeve (4) joint edge, adapter sleeve (4) inner wall lower extreme is fixed, both sides and adapter sleeve (4) fixed connection around guide plate (414), guide plate (414) are located back flow plate (411) down, guide plate (414) and adapter sleeve (4) lateral wall are seventy-five degrees angles, guide plate (414) right side wall and adapter sleeve (4) form water conservancy diversion through-hole (415).

2. The pipette gun of claim 1, wherein: slide bar (6) lower extreme fixedly connected with rolling ball (8), rolling ball (8) lower extreme rotates and is connected with compression board (9), rotation groove (911) have been seted up to compression board (9) upper surface, compression board (9) lateral wall fixedly connected with increased pressure board (912), compression board (9) lower extreme fixedly connected with transfer line (10), transfer line (10) lower surface fixedly connected with extrusion disc (11), extrusion disc (11) lateral wall can be dismantled and is connected with rubber sleeve (112), transfer line (10) lower extreme rotates and is connected with stop collar (12), stop collar (12) surface is the helical tooth, stop collar (12) and calibrated scale (8) cooperation, calibrated scale (8) include hundred microlitre calibrated scale (811), ten microlitre calibrated scale (812), each microlitre calibrated scale (813).

3. The pipette gun of claim 2 wherein: can dismantle in the rifle body (1) and be provided with a supporting cylinder (13), a supporting cylinder (13) is located calibrated scale (8) upper surface, backup pad (131) on supporting cylinder (13) upper surface fixedly connected with, go up backup pad (131) upper surface and rifle lid (2) lower surface contact, backup pad (132) under supporting cylinder (13) lower surface fixedly connected with, rectangle through-hole (133) have been seted up to supporting cylinder (13) lateral wall symmetry, increased pressure board (912) sliding connection is in rectangle through-hole (133), increased pressure board (912) are connected by spring (14) with lower backup pad (132).