CN217819224U - Quick detection device of pipettor adaptation - Google Patents

Abstract

A rapid detection device for the tightness of a pipette belongs to the field of detection technology, and solves the technical problems of many parts, poor air tightness, and unstable pressure control in the vacuum bubble test device of the equipment. The solution is: the bubble observation tube is vertically The direction is detachably installed on the fixing clip on the front side of the body, the bubble observation tube is filled with test liquid, and the lower end of the test tube extends to the bottom of the cavity of the bubble observation tube; the bottom surface of the bubble observation tube is connected with the drain pipe, and the bubble observation tube The upper part of the side wall communicates with the vacuum pump through a vacuum tube, and the bubble observation tube is matched with the vacuum pump assembly, pressure control assembly, drainage assembly, test assembly, and timing control assembly to form a complete detection device. In the utility model, by setting the bubble observation tube, the operator can intuitively and quickly see whether there are bubbles in the test liquid during the detection process of the seal of the pipette, which provides convenience for the operator and improves the seal of the pipette detection efficiency.

Description

A rapid detection device for pipette tightness

technical field

The utility model belongs to the technical field of detection, and in particular relates to a fast detection device for the tightness of a pipette.

Background technique

"Equipment vacuum bubble test" of vacuum-tightness devices (such as pipettes) is a very important test item, and the quality of the tightness is related to the accuracy of the pipette's measurement performance. The traditional vacuum-tight air bubble inspection device uses a transparent wide-mouth reagent bottle filled with clear water, and then installs a vacuum gauge, a test glass tube and an air extraction device on the cork of the wide-mouth bottle to form a test device. The device mainly has the following disadvantages:

1. It needs 2 to 3 people to operate at the same time, the work efficiency is low, and the inspection speed is reduced;

2. During use, the airtightness is not good, it is easy to leak air, and the pressure control is unstable; the equipment is fragile; the inspection efficiency of multi-channel pipettes is not high; at the same time, it needs to be equipped with a timing device, etc.

Therefore, it is urgent to design a new and convenient vacuum airtight bubble leak detection device to meet the vacuum tightness detection needs of single-channel or multi-channel pipettes.

Utility model content

The purpose of this utility model is to solve the technical problems of many parts, poor air tightness, and unstable pressure control of the vacuum bubble test device for the deficiency of the background technology. The utility model provides a quick detection device for the tightness of a pipette .

The utility model is realized by adopting the following technical solutions:

A quick detection device for the tightness of a pipette, which includes a casing, a vacuum pump and a bubble observation tube, wherein:

The side wall of the housing is provided with a test tube interface and a liquid discharge tube interface respectively, and the pipette to be detected is connected to the outer end of the test tube interface; a fixing clip is fixedly arranged on the front side of the housing, and the bubble observation tube is vertically The vertical direction is detachably installed on the fixing clip, and the bubble observation tube is filled with test liquid; the upper end of the test tube penetrates the outer wall of the shell from the outside to the inside and communicates with the test tube interface. Two electromagnetic control valves, the second electromagnetic control valve is electrically connected with the timer, the lower end of the test tube runs through the top wall of the bubble observation tube from top to bottom and extends to the bottom of the cavity of the bubble observation tube, and the lower end of the test tube is located at the test Below the liquid surface; the bottom surface of the bubble observation tube communicates with one end of the discharge pipe, and the other end of the discharge pipe penetrates the outer wall of the housing from the outside to the inside and communicates with the interface of the discharge pipe. The discharge pipe is provided with a first Electromagnetic control valve, the upper part of the side wall of the bubble observation tube communicates with the vacuum pump through the vacuum tube, the first electromagnetic three-way valve is set on the vacuum tube, and the pressure gauge controller is set on the vacuum tube between the first electromagnetic three-way valve and the bubble observation tube , the vacuum pump is electrically connected with the pressure gauge controller, the exhaust port of the vacuum pump communicates with the test tube through the exhaust pipe, and the second electromagnetic three-way valve is arranged on the exhaust pipe; the first electromagnetic control valve, the first electromagnetic three-way The valve, the second electromagnetic three-way valve, the second electromagnetic control valve and the vacuum pump are all arranged in the housing;

The front side wall of the housing is also provided with a power switch, a test switch, a drain switch and a display screen for displaying the test pipeline pressure and timing, and the electrical signals of the pressure gauge controller and the timer are electrically connected to the display screen , the power switch is electrically connected to the pressure gauge controller, the test switch is electrically connected to the fourth electromagnetic control valve, and the drain switch is electrically connected to the first electromagnetic control valve and the second electromagnetic three-way valve.

Further, the distance between the lower end of the test tube and the drain tube is 5mm-25mm.

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

1. Through the precise control of the vacuum pump and digital pressure gauge, the device can meet the pressure and holding time requirements of the tightness test required by the JJG 646 pipette verification regulations;

2. Support single-channel pipette and multi-channel pipette tightness inspection operation, single-person operation greatly saves working time and improves work efficiency;

3. The operation is simple, fast, stable, easy to operate and maintain.

In a word, by setting the bubble observation tube in the utility model, the operator can intuitively and quickly see whether there are bubbles in the test liquid during the test of the seal of the pipette, which provides convenience for the operator and improves the airtightness of the pipette. The efficiency of compatibility detection.

Description of drawings

Fig. 1 is a schematic diagram of the main view structure of the utility model;

Fig. 2 is a schematic diagram of the main view and section structure of the bubble observation tube;

Fig. 3 is a schematic diagram of pipeline connection of the utility model.

In the figure, 1 is the casing, 2 is the bubble observation tube, 3 is the fixing clip, 4 is the test tube, 5 is the discharge pipe, 6 is the first electromagnetic control valve, 7 is the vacuum tube, 8 is the vacuum pump, 9 is the first Electromagnetic three-way valve, 10 is the exhaust pipe, 11 is the second electromagnetic three-way valve, 12 is the test pipe interface, 13 is the liquid discharge pipe interface, 14 is the second electromagnetic control valve, 15 is the power switch, 16 is the test switch , 17 is a liquid discharge switch, 18 is a display screen, 19 is a pressure gauge controller, and 20 is a timer.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments of the description.

A pipette tightness rapid detection device, which includes a housing 1, a vacuum pump and a bubble observation tube 2, wherein:

A test tube interface 12 and a drain tube interface 13 are respectively arranged on the side wall of the housing 1, and the pipette to be detected communicates with the outer end of the test tube interface 12; , the bubble observation tube 2 is detachably installed on the fixing clip 3 along the vertical direction, and the bubble observation tube 2 is filled with test liquid; the upper end of the test tube 4 penetrates the outer wall of the housing 1 from outside to inside and communicates with the test tube interface 12, A second electromagnetic control valve 14 is arranged on the test tube 4 near the test tube interface 12, the second electromagnetic control valve 14 is electrically connected with the timer 20, and the lower end of the test tube 4 passes through the bubble observation tube 2 from top to bottom. The top wall extends to the bottom of the cavity of the bubble observation tube 2, and the lower end of the test tube 4 is located below the liquid level of the test liquid, and the distance between the lower end of the test tube 4 and the drain pipe 5 is 5 mm to 25 mm; The bottom surface of the observation tube 2 communicates with one end of the discharge pipe 5, and the other end of the discharge pipe 5 penetrates the outer wall of the housing 1 from the outside to the inside and communicates with the discharge pipe interface 13. The first electromagnetic control valve is arranged on the discharge pipe 5 6. The upper part of the side wall of the bubble observation tube 2 communicates with the vacuum pump 8 through the vacuum tube 7, and the first electromagnetic three-way valve 9 is arranged on the vacuum tube 7, and the vacuum tube 7 between the first electromagnetic three-way valve 9 and the bubble observation tube 2 A pressure gauge controller 19 is arranged on the top, and the vacuum pump 8 is electrically connected to the pressure gauge controller 19. The exhaust port of the vacuum pump 8 communicates with the test tube 4 through the exhaust pipe 10, and the second electromagnetic three-way valve 11 is arranged on the exhaust pipe 10. The first electromagnetic control valve 6, the first electromagnetic three-way valve 9, the second electromagnetic three-way valve 11, the second electromagnetic control valve 14 and the vacuum pump 8 are all arranged in the housing 1;

The front side wall of the housing 1 is also provided with a power switch 15, a test switch 16, a drain switch 17, and a display screen 18 for displaying test line pressure and timing, a pressure gauge controller 19 and a timer 20. The signal is electrically connected to the display screen 18, the power switch 15 is electrically connected to the pressure gauge controller 19, the test switch 16 is electrically connected to the fourth electromagnetic control valve 14, and the drain switch 17 is electrically connected to the first electromagnetic control valve 6 and the second electromagnetic control valve. The electromagnetic three-way valve 11 is electrically connected.

The use process of the present utility model is as follows:

First, turn on the power switch 15 button, the first electromagnetic three-way valve 9 is opened, the first electromagnetic control valve 6, the second electromagnetic three-way valve 11 and the fourth electromagnetic control valve 14 are all closed, and the pressure gauge controller 19 controls the vacuum pump 8 is started, and after the set pressure is reached in the test tube 4, the vacuum pump 8 stops working, and the first electromagnetic three-way valve 9 is closed. When the pressure in the test tube 4 is higher than the set pressure, the pressure gauge controller 19 will automatically start the vacuum pump 8 and the first electromagnetic three-way valve 9 to ensure that the pressure in the test tube 4 remains within the required range;

Next, press the test switch 16, the second electromagnetic control valve 14 is in an open state, and the test liquid required by the equipment is sucked in the bubble observation tube 2 by the test tube 4 through the test tube interface 12; the test switch 16 is closed, and the second electromagnetic control valve 14 Close, the test liquid level in the test tube 4 is higher than the test liquid level in the bubble observation tube 2, waiting to detect the tightness of the pipette;

Again, connect the pipette to the test tube interface 12, press the test switch 16 again, the second electromagnetic control valve 14 is in the open state, and the first electromagnetic three-way valve 9 is automatically controlled by the pressure gauge controller 19. The first electromagnetic control valve 6 and the second electromagnetic three-way valve 11 are in the closed state, and the vacuum in the test pipeline is controlled within the pressure range required for the test. The pressure and timing in the test pipeline are displayed on the display screen 18. Observe Whether there are bubbles in the bubble observation tube 2, if no bubbles are produced within the specified time, it is considered that the sealing performance of the pipette is normal, otherwise, there is a problem with the sealing, after the test, press the test switch 16;

Finally, after all the pipettes have been detected, press the liquid discharge switch 17, the first electromagnetic three-way valve 9 and the fourth electromagnetic control valve 14 are in the closed state, and the first electromagnetic control valve 6 and the second electromagnetic three-way valve 11 are in the closed state. Open state, at this moment the pressure in the test pipeline rises, the vacuum pump 8 starts, the test liquid in the bubble observation tube 2 is discharged by pressure, after discharge, close the liquid discharge switch 17, turn off the power switch 15, and prepare for the next detection and use.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any skilled person in the technical field can easily think of changes or changes within the technical scope disclosed in the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (2)

1. The utility model provides a pipettor leakproofness short-term test device, it includes casing, vacuum pump and bubble observation pipe, its characterized in that:

a test tube interface (12) and a liquid discharge tube interface (13) are respectively arranged on the side wall of the shell (1), and a liquid transfer device to be detected is communicated with the outer end of the test tube interface (12); a fixing clamp (3) is fixedly arranged on the front side surface of the shell (1), the bubble observation tube (2) is detachably arranged on the fixing clamp (3) along the vertical direction, and the bubble observation tube (2) is filled with test liquid; the upper end of the testing tube (4) penetrates through the outer wall of the shell (1) from outside to inside and is communicated with the testing tube interface (12), a second electromagnetic control valve (14) is arranged on the testing tube (4) close to the testing tube interface (12), the second electromagnetic control valve (14) is electrically connected with the timer (20), the lower end of the testing tube (4) penetrates through the top wall of the bubble observation tube (2) from top to bottom and extends to the bottom of the cavity of the bubble observation tube (2), and the lower end of the testing tube (4) is located below the liquid level of the testing liquid; the bottom surface of the bubble observation pipe (2) is communicated with one end of a liquid discharge pipe (5), the other end of the liquid discharge pipe (5) penetrates through the outer wall of the shell (1) from outside to inside and is communicated with a liquid discharge pipe interface (13), a first electromagnetic control valve (6) is arranged on the liquid discharge pipe (5), the upper part of the side wall of the bubble observation pipe (2) is communicated with a vacuum pump (8) through a vacuumizing pipe (7), a first electromagnetic three-way valve (9) is arranged on the vacuumizing pipe (7), a pressure gauge controller (19) is arranged on the vacuumizing pipe (7) between the first electromagnetic three-way valve (9) and the bubble observation pipe (2), the vacuum pump (8) is electrically connected with the pressure gauge controller (19), an exhaust port of the vacuum pump (8) is communicated with the test pipe (4) through an exhaust pipe (10), and a second electromagnetic three-way valve (11) is arranged on the exhaust pipe (10); the first electromagnetic control valve (6), the first electromagnetic three-way valve (9), the second electromagnetic three-way valve (11), the second electromagnetic control valve (14) and the vacuum pump (8) are all arranged in the shell (1);

still be provided with switch (15), test switch (16), flowing back switch (17) and be used for showing the display screen (18) that test line pressure and timing on the lateral wall before casing (1), the signal of telecommunication and display screen (18) electric connection of manometer controller (19) and time-recorder (20), switch (15) and manometer controller (19) electric connection, test switch (16) and second solenoid electric valve (14) electric connection, flowing back switch (17) and first solenoid electric valve (6) and second solenoid electric three-way valve (11) electric connection.

2. The device for quickly detecting pipette adhesiveness according to claim 1, wherein: the distance between the lower end of the test tube (4) and the liquid discharge tube (5) is 5-25 mm.

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