Side aeration high-precision micro-injection pump

Abstract

The utility model relates to the technical field of liquid injection, in particular to a side aeration high-precision micro-injection pump. Comprising a shell, the top of the front side of the shell is provided with a multi-way switching valve, the multi-way switching valve is driven and switched through a valve motor installed in the shell, a valve body of the multi-way switching valve is provided with an air hole, a closed hole, a plurality of liquid inlet holes and a plurality of liquid outlet holes in the circumferential direction, and a transparent glass tube is installed at the bottom of the multi-way switching valve. An upper end cover is arranged at the top of the transparent glass tube, a liquid inlet is formed in the upper end cover and communicated with a liquid channel in the center of the multi-way switching valve, and an aeration hole is formed in one side of the lower portion of the transparent glass tube. The solution in the transparent glass tube can be uniformly mixed due to the passing of the high-pressure inert gas, the mixing efficiency is high, and the effect is good; air is instantaneously injected into the transparent glass tube, so that the air pressure in the transparent glass tube is rapidly changed, bubbles in the transparent glass tube are exploded, the bubbles can be completely eliminated, accurate liquid drainage is ensured, and accurate test results are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid injection technical field especially relates to a side aeration high accuracy micro injection pump. BACKGROUND

[0002] At present, when liquid injection, often need to mix two or more different liquid, then carry out injection operation, wherein, the uniformity and drop into accuracy of liquid mixing directly influence test result. And at present in liquid mixing, mainly rely on oscillation and mix, this way liquid is easy to mix unevenly, low efficiency, poor effect, thereby influence test result, and in the oscillation process, easy to produce air bubble, some air bubble will be attached in the syringe inner wall and cannot be discharged, cause the pressure in the syringe to be big when discharging, due to the compressibility of gas causes the discharge volume to be less, influence drop into accuracy, thereby influence test result, at present, there is no good solution to the above problem.

[0003] Summarizing above, how can liquid be mixed evenly and eliminate the generated air bubble, has become the technical problem that the industry urgently needs to solve. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to make up for the deficiency of prior art, provide a side aeration high accuracy micro injection pump, solved the problem that the liquid oscillation and mix unevenly, low efficiency, poor effect of the past, solved the problem that the drop into accuracy of the past is influenced because of the existence of air bubble.

[0005] The utility model discloses a technical scheme that adopts the technical scheme for solving the above technical problem:

[0006] A side aeration high accuracy micro injection pump, including the casing, the casing front side top is installed with multichannel switch valve, and the multichannel switch valve is driven switching through the valve motor installed in the casing, and the valve body of multichannel switch valve is equipped with an air hole, a closed hole and a plurality of liquid inlet holes, liquid outlet holes along the circumferential direction, and the bottom of multichannel switch valve is installed transparent glass tube, and the top of transparent glass tube is equipped with upper end cap, and the liquid inlet is arranged in the upper end cap, and the liquid inlet is connected with the liquid passage in the center of multichannel switch valve, and one side of the lower part of transparent glass tube is equipped with aeration hole, and the inside of transparent glass tube is equipped with the piston, and the piston is connected with the piston rod, and the bottom of transparent glass tube is equipped with lower end cap, and the piston rod passes through lower end cap and stretches to the outside, and the bottom of piston rod is connected with the drive mechanism arranged in the casing.

[0007] Rotary valve core is arranged in the multichannel switch valve, and the output shaft of valve motor is connected with rotary valve core, and the rotary valve core is equipped with the intercommunication channel, and the intercommunication channel is used for connecting air hole, closed hole, liquid inlet hole or liquid outlet hole with liquid passage.

[0008] The transparent glass tube is fixedly connected with the upper end cover and the lower end cover.

[0009] The upper end cover is fixedly connected with a valve body of the multi-way switching valve.

[0010] A sleeve is mounted on the transparent glass tube at the aeration hole, and a connector is arranged in the sleeve and connected with the high-pressure inert gas source through a pipeline.

[0011] The driving mechanism comprises a pump motor mounted in the shell, an output shaft of the pump motor is connected with a vertical screw rod through a transmission belt, a bottom of the piston rod is connected with a horizontal linkage plate, a guide groove for guiding the horizontal linkage plate up and down is arranged in the shell, and the other end of the horizontal linkage plate is threadedly connected with the screw rod.

[0012] The closed hole is arranged at a position close to the air hole.

[0013] The utility model discloses the above -mentioned scheme has the following advantages:

[0014] The aeration hole is arranged on one side of the lower part of the transparent glass tube, the aeration hole is connected with the high-pressure inert gas source through a pipeline, the high-pressure inert gas source can pass into the high-pressure inert gas into the transparent glass tube through the aeration hole, the high-pressure inert gas is discharged through the air hole of the multi-way switching valve in the transparent glass tube, and the solution in the transparent glass tube can be uniformly mixed because of the passing of the high-pressure inert gas, the mixing efficiency is high, and the effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the front view structure schematic diagram of the utility model.

[0016] Figure 2 It is the lateral section structure schematic diagram of the utility model.

[0017] Figure 3 It is the front view structure schematic diagram of the utility model multi-way switching valve.

[0018] Figure 4 It is the rear view structure schematic diagram of the utility model multi-way switching valve.

[0019] In the figure, 1, shell, 2, multi-pass switching valve, 3, valve motor, 4, valve body, 5, air hole, 6, closed hole, 7, liquid inlet hole, 8, liquid outlet hole, 9, transparent glass tube, 10, upper end cover, 11, liquid inlet, 12, liquid channel, 13, aeration hole, 14, piston, 15, piston rod, 16, lower end cover, 17, rotary valve core, 18, communication channel, 19, sleeve, 20, pump motor, 21, transmission belt, 22, screw rod, 23, horizontal linkage plate, 24, guide groove. DETAILED DESCRIPTION

[0020] To clearly illustrate the technical features of the present scheme, the present utility model is described in detail below through specific implementation manners, and in conjunction with its accompanying drawings.

[0021] As Figures 1-4 shown, a side aeration high-precision micro-injection pump, comprising a shell 1, the shell 1 front side top is provided with a multi-pass switching valve 2, the multi-pass switching valve 2 is driven to switch through the valve motor 3 installed in the shell 1, the valve body 4 of the multi-pass switching valve 2 is provided with an air hole 5, a closed hole 6 and a plurality of liquid inlet holes 7, liquid outlet holes 8 along the circumferential direction, the multi-pass switching valve 2 bottom installs transparent glass tube 9, the top of the transparent glass tube 9 is provided with an upper end cover 10, the upper end cover 10 is provided with a liquid inlet 11, the liquid inlet 11 is communicated with the liquid channel 12 in the center of the multi-pass switching valve 2, the lower part of the transparent glass tube 9 is provided with an aeration hole 13 on one side, the inside of the transparent glass tube 9 is provided with a piston 14, the piston 14 is connected with the piston rod 15, the bottom of the transparent glass tube 9 is provided with a lower end cover 16, the piston rod 15 passes through the lower end cover 16 to the outside, the bottom of the piston rod 15 is connected with the drive mechanism arranged in the shell 1.

[0022] The multi-pass switching valve 2 is provided with a rotary valve core 17, the rotary valve core 17 is connected with the output shaft of the valve motor 3, the rotary valve core 17 is provided with a communication channel 18, the communication channel 18 is used for connecting the air hole 5, the closed hole 6, the liquid inlet hole 7 or the liquid outlet hole 8 with the liquid channel 12. The valve motor 3 can drive the rotary valve core 17 to rotate when working, when the rotary valve core 17 rotates, one end of the communication channel 18 is always communicated with the liquid channel 12, and the other end rotates along the circumference and can be communicated with any one of the air hole 5, the closed hole 6, the liquid inlet hole 7 or the liquid outlet hole 8.

[0023] The transparent glass tube 9 is sealed and fixed between the upper end cover 10 and the lower end cover 16 to prevent liquid leakage.

[0024] The upper end cover 10 is fixedly connected with the valve body 4 of the multi-pass switching valve 2, which can realize the installation and fixation of the transparent glass tube 9.

[0025] A transparent glass tube 9 is installed on the aeration hole 13, and a sleeve 19 is installed on the transparent glass tube 9, and the sleeve 19 is provided with a joint, and the joint is connected with a high-pressure inert gas source through a pipeline.

[0026] The driving mechanism comprises a pump motor 20 installed in the shell 1, an output shaft of the pump motor 20 is connected with a vertical screw rod 22 through a transmission belt 21, a bottom of the piston rod 15 is connected with a horizontal linkage plate 23, the shell 1 is provided with a guide groove 24 for guiding the horizontal linkage plate 23 to move up and down, and the other end of the horizontal linkage plate 23 is threadedly connected with the screw rod 22. When the pump motor 20 works, the screw rod 22 can be driven to rotate through the transmission belt 21, and the horizontal linkage plate 23 will move up and down under the restriction of the guide groove 24 due to the threaded connection between the screw rod 22 and the horizontal linkage plate 23, so as to drive the piston rod 15 to move up and down, and the piston rod 15 drives the piston 14 to reciprocate up and down.

[0027] The closed hole 6 is arranged at a position close to the air hole 5, and the distance between the closed hole 6 and the air hole 5 is short, so that the closed hole 6 and the air hole 5 can be quickly switched.

[0028] Working principle:

[0029] When the liquid is mixed, the multi-way switch valve 2 is switched to one of the liquid inlet holes 7, the liquid inlet hole 7 is connected with a liquid container through a pipeline, the driving mechanism drives the piston 14 to move downward to quantitatively extract one kind of liquid, then the multi-way switch valve 2 is switched to another liquid inlet hole 7, the liquid inlet hole 7 is connected with another liquid container through a pipeline, the driving mechanism drives the piston 14 to continue to move downward to quantitatively extract another kind of liquid, and then the multi-way switch valve 2 is switched to the air hole 5, the driving mechanism drives the piston 14 to continue to move downward to below the aeration hole 13, at this time, the high-pressure inert gas of the high-pressure inert gas source can be introduced into the transparent glass tube 9 through the aeration hole 13, the high-pressure inert gas passes through the inside of the transparent glass tube 9 and is discharged through the air hole 5 of the multi-way switch valve 2, and the solution in the transparent glass tube 9 can be uniformly mixed due to the passing of the high-pressure inert gas. After the liquid is mixed uniformly through aeration, bubbles will be generated in the transparent glass tube 9, in order to eliminate these bubbles, the piston 14 is first moved to above the aeration hole 13, then the multi-way switch valve 2 is switched to the closed hole 6, the piston 14 is driven to move downward, a negative pressure is generated in the transparent glass tube 9, then the multi-way switch valve 2 is quickly switched to the air hole 5, air is instantaneously injected into the transparent glass tube 9, the air pressure in the transparent glass tube 9 changes sharply, the bubbles in the transparent glass tube 9 are burst, and the bubbles can be completely eliminated to ensure accurate liquid discharge, and finally the liquid is discharged outward through the liquid outlet hole 8 for test use.

[0030] The above specific embodiments cannot be regarded as a limitation on the protection scope of the utility model, and any alternative improvement or change made by the person skilled in the art to the utility model embodiments falls within the protection scope of the utility model.

[0031] The utility model is not detailed, which is the known technology of the technical personnel in the technical field.

Claims

1. A high-precision microsyringe pump with side aeration, characterized in that: The utility model provides a kind of liquid level control device, including shell, the multiple-pass switching valve is mounted on the top of shell front side, multiple-pass switching valve is driven switching by valve motor installed in shell, and the valve body of multiple-pass switching valve is equipped with an air hole, a closed hole and several liquid inlet holes, liquid outlet holes along the circumferential direction, multiple-pass switching valve bottom installs transparent glass tube, the top of transparent glass tube is equipped with upper end cap, liquid inlet is equipped in upper end cap, and liquid inlet is connected with the liquid passage in the center of multiple-pass switching valve, the lower part of transparent glass tube is equipped with aeration hole in one side, and the inside of transparent glass tube is equipped with piston, piston is connected with piston rod, and the bottom of transparent glass tube is equipped with lower end cap, and piston rod is stretched to outside by passing through lower end cap downwards, and the bottom of piston rod is connected with driving mechanism arranged in shell.

2. The high-precision micro-injection pump with side aeration according to claim 1, characterized in that: The multiple-pass switching valve is equipped with rotary valve core, and the output shaft of valve motor is connected with rotary valve core, and the communication channel is arranged on rotary valve core, and the communication channel is used to connect air hole, closed hole, liquid inlet hole or liquid outlet hole with liquid passage.

3. The high-precision micro-injection pump with side aeration according to claim 1, characterized in that: The transparent glass tube is sealed and fixed between upper end cap and lower end cap.

4. The high-precision micro-injection pump with side aeration according to claim 1, characterized in that: The upper end cap is fixedly connected with the valve body of multiple-pass switching valve.

5. The high-precision micro-injection pump with side aeration according to claim 1, characterized in that: The transparent glass tube is mounted on the sleeve of aeration hole, and the interface is arranged in the sleeve, and the interface is connected with high-pressure inert gas source by pipeline.

6. The high-precision microsyringe pump with side aeration according to claim 1, characterized in that: The driving mechanism includes pump motor installed in shell, and the output shaft of pump motor is connected with vertical installed screw rod by transmission belt, and the bottom of piston rod is connected with horizontal linkage plate, and the guiding groove for guiding horizontal linkage plate is arranged in shell, and the other end of horizontal linkage plate is screw connected with screw rod.

7. The high-precision micro-injection pump with side aeration according to claim 1, characterized in that: The closed hole is arranged at the position close to air hole.

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