A test kit with a gas-liquid isolation trap

Abstract

The present invention relates to a test kit with a gas-liquid isolation trap, which comprises a box body, an air inlet and a liquid outlet arranged on the side of the box body, and a liquid storage tank arranged on the box body; one end of the liquid storage tank is connected to the air inlet through a slender flow channel, and the other end of the liquid storage tank is connected to the liquid outlet, and a gas-liquid isolation trap is arranged between the liquid storage tank and the slender flow channel. The present invention can prevent liquid reagents from being sucked back into a gas pipeline and can stabilize the air intake pressure and the liquid outlet.

Description

Technical Field

[0001] The invention relates to a test kit with a gas-liquid isolation trap. Background Art

[0002] Test kits are common laboratory supplies, usually used to store reaction reagents. For liquid reagents, when you need to take the reagents in the test kit, you need to squeeze them out in a certain way. The current conventional method is to use air pressure to squeeze the reagents out of the test kit. Since the gas and liquid pipelines need to be directly connected, it is very easy for liquid reagents to be sucked back into the gas pipeline. Summary of the invention

[0003] The purpose of the present invention is to provide a reagent box with a gas-liquid isolation trap which can prevent liquid reagents from being sucked back into a gas pipeline and can store more than two reagents at the same time and has stable liquid discharge.

[0004] The present invention adopts the following technical solution:

[0005] A test kit with a gas-liquid isolation trap comprises a box body, an air inlet and a liquid outlet arranged on the side of the box body, and a liquid storage tank arranged on the box body; one end of the liquid storage tank is connected to the air inlet through a slender flow channel, the other end of the liquid storage tank is connected to the liquid outlet, and a gas-liquid isolation trap is arranged between the liquid storage tank and the slender flow channel.

[0006] The elongated flow channel includes a first flow channel and a fourth flow channel arranged on the bottom surface of the box body and a second flow channel and a third flow channel arranged on the top surface of the box body, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are connected in sequence.

[0007] Among them, the gas-liquid isolation trap includes a first trap groove arranged between the third flow channel and the fourth flow channel and a second trap groove arranged between the fourth flow channel and the liquid storage tank, a first air column is arranged in the first trap groove, a second air column is arranged in the second trap groove, the third flow channel is connected to the first trap groove through the first air column, and the fourth flow channel is connected to the second trap groove through the second air column.

[0008] Wherein, an air intake bin connected to the air inlet is arranged on the box body, and the air intake bin is connected to the first flow channel through an air storage bin arranged on the lower bottom surface of the box body.

[0009] Wherein, the first flow channel and the second flow channel are connected through an overflow groove arranged on the lower bottom surface of the box body.

[0010] Wherein, the overflow groove is connected with the second flow channel through a third trap groove arranged on the top surface of the box body, a third air column is arranged in the third trap groove, and the overflow groove is connected with the third trap groove through the third air column.

[0011] Wherein, the second flow channel is connected with the third flow channel through a sponge groove arranged on the top surface of the box body, and a water-absorbing sponge is arranged in the sponge groove.

[0012] Wherein, the second trap tank is connected to the liquid storage tank through a connecting channel.

[0013] Wherein, the first flow channel, the second flow channel and the third flow channel are all zigzag flow channels.

[0014] The beneficial effect of the present invention is that the liquid reagent is prevented from being sucked back into the gas pipeline through the slender flow channel and the gas-liquid isolation trap, and in particular, when multiple reagents are stored at the same time, the reagents can be prevented from being mixed and contaminated with each other. The slender pipeline and the compartment can extend the distance for the gas to reach the liquid storage tank, and after the gas is pressurized by the return flow channel and the compartment, the flow rate of the liquid reagent when it is squeezed out from the liquid outlet is stable, which is convenient for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the top surface of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the bottom surface of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2 As shown, a test kit with a gas-liquid isolation trap comprises a box body 1, an air inlet 2 and a liquid outlet 3 arranged on the side of the box body 1, and a liquid storage tank 4 arranged on the box body 1; one end of the liquid storage tank 4 is connected to the air inlet 2 through a slender flow channel, and the other end of the liquid storage tank 4 is connected to the liquid outlet 3, and a gas-liquid isolation trap is arranged between the liquid storage tank 4 and the slender flow channel.

[0018] The elongated flow channel includes a first flow channel 5 and a fourth flow channel 6 arranged on the bottom surface of the box body 1, and a second flow channel 7 and a third flow channel 8 arranged on the top surface of the box body 1, and the first flow channel 5, the second flow channel 7, the third flow channel 8, and the fourth flow channel 6 are connected in sequence. The first flow channel 5, the second flow channel 7, and the third flow channel 8 are all folded flow channels, and specifically, they can be S-shaped connected end to end. After the gas passes through the elongated flow channel, the gas repeatedly changes direction to flow, which can extend the time for the gas to reach the liquid storage tank while ensuring that the pressure of the liquid storage tank is uniform and stable, so that the liquid output is stable, avoiding the problem of unstable liquid output flow caused by unstable pressure of the gas input at the air inlet.

[0019] The gas-liquid isolation trap comprises a first trap groove 9 arranged between the third flow channel 8 and the fourth flow channel 6 and a second trap groove 10 arranged between the fourth flow channel 6 and the liquid storage tank 4. A first air column 11 is arranged in the first trap groove 9, and a second air column 12 is arranged in the second trap groove 10. The third flow channel 8 is connected to the first trap groove 9 through the first air column 11, and the fourth flow channel 6 is connected to the second trap groove 10 through the second air column 12. Once the reagent in the liquid storage tank flows back to the elongated flow channel, it will first be poured into the second trap groove through the fourth flow channel. At this time, the second air column is higher than the bottom surface of the second trap groove. Only when the liquid level in the second trap groove reaches a certain height will it reach the top opening of the air column and continue to flow back into the third flow channel. The first trap groove is connected to the third flow channel. As mentioned above, the liquid level needs to exceed the first air column before it will continue to flow forward. Therefore, the gas-liquid isolation trap can prevent the liquid from flowing back to the air inlet.

[0020] The box body 1 is provided with an air inlet bin 13 connected with the air inlet 2, and the air inlet bin 13 is connected with the first flow channel 5 through an air storage bin 14 provided on the bottom surface of the box body 1. The gas enters the air inlet bin from the air inlet and then enters the elongated flow channel through the air storage bin, and the air inlet bin and the air storage bin play the role of the first pressure equalization.

[0021] The first flow channel 5 is connected to the second flow channel 7 via an overflow groove 15 disposed on the bottom surface of the box body 1. The overflow groove also serves to further prevent the liquid reagent from continuing to flow back forward.

[0022] The overflow groove 15 is connected to the second flow channel 7 through a third trap groove 16 arranged on the top surface of the box body 1. A third air column 17 is arranged in the third trap groove 16. The overflow groove 15 is connected to the third trap groove 16 through the third air column 17. The third trap here has the same function as the first and second traps mentioned above.

[0023] The second flow channel 7 is connected to the third flow channel 8 through a sponge groove 18 provided on the top surface of the box body 1.

[0024] An absorbent sponge is provided in the groove 18. The absorbent sponge can filter gas, and at the same time, when liquid reagent is sucked back into the sponge groove, the absorbent sponge will absorb the liquid reagent, thereby improving the anti-backflow effect.

[0025] The second trap groove 10 is connected to the liquid storage tank 4 via a connecting flow channel 19. The connecting flow channel can increase the difficulty of liquid back suction on the one hand, and can further play a role in gas pressure equalization on the other hand.

[0026] For Figure 1 and Figure 2The test kit shown has two liquid storage tanks, which are respectively connected to the gas storage bin through the same structure. The gas enters the gas storage bin through the gas inlet and the gas is divided into two and enters their respective flow channels. The gas first enters the overflow groove through the first flow channel. The overflow groove can be multiple continuous. After passing through the continuous overflow grooves, the gas enters the third trap groove through the third air column. The gas continues to move forward from the third trap groove, enters the sponge groove after passing through the second flow channel, and then enters the third flow channel from the sponge groove. The third flow channel is connected to the first air column to introduce the gas into the first trap groove. The gas then passes from the first trap groove through the fourth flow channel into the second air column and enters the second trap groove, and is finally connected to the liquid storage tank through the connecting flow channel.

[0027] Of course, there can be multiple liquid storage tanks, which are connected to the gas storage tank through the same structure. The setting of the slender flow channel and the gas-liquid isolation trap can effectively avoid the occurrence of backflow. Even if backflow occurs, multiple reagents are difficult to mix with each other, thus achieving the effect of storing multiple reagents in one test kit.

[0028] Each flow channel and compartment of the present invention is separated by a partition plate provided inside the box body, on the top surface or on the bottom surface, and then covered with a plastic film. Since the volume of the liquid storage tank is large, the plastic film will be lifted up and bulged when the liquid is filled, and therefore a support plate 20 is provided in the liquid storage tank, and the top of the support plate is fixed to the plastic film.

Claims

1. A test kit with a gas-liquid isolation trap, characterized in that: It comprises a box body (1), an air inlet (2) and a liquid outlet (3) arranged on the side of the box body (1), and a liquid storage tank (4) arranged on the box body (1); one end of the liquid storage tank (4) is connected to the air inlet (2) through a slender flow channel, the other end of the liquid storage tank (4) is connected to the liquid outlet (3), and a gas-liquid isolation trap is arranged between the liquid storage tank (4) and the slender flow channel; The elongated flow channel comprises a first flow channel (5) and a fourth flow channel (6) arranged on the lower bottom surface of the box body (1), and a second flow channel (7) and a third flow channel (8) arranged on the upper top surface of the box body (1), wherein the first flow channel (5), the second flow channel (7), the third flow channel (8) and the fourth flow channel (6) are connected in sequence; The gas-liquid isolation trap comprises a first trap groove (9) arranged between the third flow channel (8) and the fourth flow channel (6), and a second trap groove (10) arranged between the fourth flow channel (6) and the liquid storage groove (4); a first gas column (11) is arranged in the first trap groove (9), and a second gas column (12) is arranged in the second trap groove (10); the third flow channel (8) is connected to the first trap groove (9) via the first gas column (11), and the fourth flow channel (6) is connected to the second trap groove (10) via the second gas column (12); The box body (1) is provided with an air intake bin (13) which is in communication with the air intake port (2); the air intake bin (13) is in communication with the first flow channel (5) via an air storage bin (14) which is provided on the bottom surface of the box body (1); The first flow channel (5) and the second flow channel (7) are connected via an overflow groove (15) arranged on the bottom surface of the box body (1); The overflow groove (15) is connected to the second flow channel (7) via a third trap groove (16) arranged on the top surface of the box body (1); a third air column (17) is arranged in the third trap groove (16); and the overflow groove (15) is connected to the third trap groove (16) via the third air column (17); The second flow channel (7) is connected to the third flow channel (8) via a sponge groove (18) provided on the top surface of the box body (1), and a water-absorbing sponge is provided in the sponge groove (18); The second trap groove (10) is connected to the liquid storage groove (4) via a connecting flow channel (19); The first flow channel (5), the second flow channel (7) and the third flow channel (8) are all folded flow channels; Each flow channel and compartment is formed by arranging a partition inside the box body (1), on the upper top surface or the lower bottom surface, and then covering the partition with a plastic film. A support plate (20) is arranged in the liquid storage tank (4), and the top of the support plate is fixed to the plastic film.

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