CN210751520U - Suck-back prevention suction filtration device - Google Patents

Abstract

An anti-suck back suction filtration device, comprising a safety bottle provided with an air inlet pipe and an air outlet pipe, the air outlet pipe of the safety bottle is connected with a vacuum pump, the air inlet pipe is connected with a suction filter bottle, and the upper part of the suction filter bottle is connected with a test solution containing test solution The Buchner funnel is also provided with a pressure relief valve on the safety bottle. The utility model is easy to release pressure and open the suction filtration bottle, and can increase a larger negative pressure difference to enhance the suction filtration efficiency.

Description

An anti-suck back suction filter device

technical field

The utility model belongs to the field of experimental equipment, in particular to an anti-suck back suction filter device.

technical background

In biochemical laboratories, suction filtration bottles are often used to achieve solid-liquid separation of test solutions. When in use, connect the suction hose of the vacuum pump to the branch pipe of the suction filter bottle, and turn on the vacuum pump to achieve suction filtration. After the suction filtration is completed After that, remove the hose or Buchner funnel, but because it is operated under negative pressure, it is more laborious to operate, and it is easy to break the suction filter bottle, and if the negative pressure is too much, the water of the vacuum pump is easy to be sucked back and flowed into In the suction filter bottle, the reagent is contaminated, so the traditional suction filter bottle has great defects.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide an anti-suck back suction filtration device, which is easy to release pressure and open the suction filtration bottle, and can increase a larger negative pressure difference to enhance the suction filtration efficiency.

The technical scheme adopted by the utility model is:

An anti-suck back suction filtration device, comprising a safety bottle provided with an air inlet pipe and an air outlet pipe, the air outlet pipe of the safety bottle is connected with a vacuum pump, the air inlet pipe is connected with a suction filter bottle, and the upper part of the suction filter bottle is connected with a test solution containing test solution The Buchner funnel is also provided with a pressure relief valve on the safety bottle.

Further, a liquid outlet pipe with a valve is also arranged at the bottom of the suction filter bottle.

The beneficial effects of the present utility model:

By setting the safety bottle, the vacuum pump and the suction filter bottle are separated, which effectively prevents the water in the vacuum pump from flowing back into the suction filter bottle due to too much negative pressure in the suction filter bottle and contaminating the test solution;

After the suction filtration is completed, open the pressure relief valve on the safety bottle, so that the suction filter bottle is connected to the atmosphere, and the normal pressure operation is convenient for the disassembly of the connecting pipeline and the Buchner funnel;

The liquid outlet pipe set at the bottom of the suction filtration bottle facilitates the discharge of the test solution in the suction filtration bottle after suction filtration.

Description of drawings

Fig. 1 is the overall structure connection schematic diagram of this suction filtration device;

In the figure, (1) vacuum pump, (2) air outlet pipe, (3) pressure relief valve, (4) air inlet pipe, (5) Buchner funnel, (6) suction filter bottle, (7) liquid outlet pipe, (8) ) safety bottle.

Detailed ways

As shown in Figure 1, a suction filter device for preventing back suction includes a safety bottle 8 provided with an air inlet pipe 4 and an air outlet pipe 2, the air outlet pipe 2 of the safety bottle 8 is connected with a vacuum pump 1, and the air inlet pipe 4 is connected to the suction filter Bottle 6, the upper part of the suction filter bottle 6 is connected with a Buchner funnel 5 containing the test solution, the bottom of the suction filter bottle 6 is provided with a liquid outlet pipe 7 with a valve, and a pressure relief valve 3 is also provided on the safety bottle 8 .

When in use, close the valve of the liquid outlet pipe 7 and the pressure relief valve 3, pour the test solution into the Buchner funnel 5, open the vacuum pump 1 for suction filtration, after the suction filtration is completed, close the vacuum pump 1, and open the pressure relief valve 3, so that Both the safety bottle 8 and the suction filter bottle 6 are connected to the atmosphere, and the Buchner funnel 5 can be easily removed. At the same time, during the suction filtration process, due to the buffering effect of the safety bottle 8, a large negative pressure difference can be used for pumping. filter.

Claims (1)

1. The utility model provides a prevent suction's suction filtration device, its characterized in that, including safety bottle (8) that is equipped with intake pipe (4) and outlet duct (2), outlet duct (2) of safety bottle (8) are connected with vacuum pump (1), intake pipe (4) are connected to buchner flask (6), and this buchner flask (6) upper portion is connected with buchner funnel (5) that hold the test solution still be equipped with relief valve (3) on safety bottle (8) buchner flask (6) bottom still sets up drain pipe (7) that have the valve.

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