CN114887833A - Cut-off type single liquid drop generating device - Google Patents

Abstract

The invention discloses a cut-off single droplet generating device, which relates to the technical field of fluid mechanics, in particular to a cut-off single droplet generating device. There is a first return spring, one side of the first return spring away from the liquid inlet structure is provided with a one-way conduction device, one side of the one-way conduction device away from the first return spring is provided with a second return spring, and the second return spring is away from the one-way guide. One side of the communication device is provided with a liquid outlet structure, a support plate is fixedly installed at the bottom of the cylinder body, and a base is fixedly installed at the bottom of the support plate. The cut-off single droplet generating device proposed by the present invention controls the liquid passage time by adjusting the rotating speed of the movable turntable. The liquid forms a single droplet at the needle through the needle connecting tube, and drops under the action of gravity to realize the release of the single droplet, which is different from the existing one. The problem of uneven particle size in the drive-type controlled liquid discharge in the prior art has broad application prospects.

Description

A cut-off single droplet generating device

technical field

The invention relates to the technical field of fluid mechanics, in particular to a cut-off single droplet generating device.

Background technique

There are three main methods of droplet generation: driven pump extrusion type, pneumatic pulse type and piezoelectric type. The driven pump extrusion type droplet generation system enables the mechanical parts to directly act on the liquid in the liquid cavity to drive the droplet extrusion and drive the droplet generation system. It is difficult to precisely control the moving distance of the parts; the pneumatic pulse droplet generation system uses air pressure instead of mechanical parts to extrude the droplets from the nozzle, and the use of the compressible characteristics of gas has higher requirements on the airtightness of the system; piezoelectric droplets The generation system uses piezoelectric signals to deform the piezoelectric material to extrude a single droplet, and the diameter of the formed droplet is extremely small, which is not conducive to the experimental research on the result of droplet collision behavior. It is difficult to control the production of uniform and stable droplets.

To this end, we need to design a cut-off single droplet generating device to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a cut-off single droplet generating device in view of the shortcomings of the prior art, so as to solve the problems raised in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a cut-off single droplet generating device, comprising a cylinder body, a liquid inlet structure is arranged inside the cylinder body, and a first return spring is arranged at the bottom of the liquid inlet structure, One side of the first return spring away from the liquid inlet structure is provided with a one-way conduction device, and one side of the one-way conduction device away from the first return spring is provided with a second return spring, and the second return spring is away from the one-way guide One side of the communication device is provided with a liquid outlet structure, a support plate is fixedly installed at the bottom of the cylinder body, and a base is fixedly installed at the bottom of the support plate.

As a preferred technical solution of the present invention, the liquid inlet structure includes a liquid injection pipe, a liquid inlet, a connecting pipe, a first spherical valve, a first liquid outlet pipe and a first piston pad. , the connecting pipe, the first liquid outlet pipe and the first piston pad are all in a connected state, the outer diameter of the first spherical valve is larger than the inner diameter of the first liquid outlet pipe, and the liquid injection pipe is slidably connected to the cylinder.

As a preferred technical solution of the present invention, the outer diameter of the first piston pad matches the inner diameter of the cylinder, the first piston pad is slidably connected to the cylinder, and the first piston pad moves up and down to increase the The internal pressure of the large cylinder opens or closes the function of the first ball valve.

As a preferred technical solution of the present invention, the one-way conduction device includes a first blocking ring, a second blocking ring, a conveying pipe and a second spherical valve, and the outer diameters of the first blocking ring and the second blocking ring are the same as The inner diameter of the cylinder body is matched, the first plugging ring and the second plugging ring are fixedly connected with the cylinder body, and the first plugging ring and the second plugging ring play a role in matching the first piston pad and the second piston pad to increase the interior of the cylinder effect of pressure.

As a preferred technical solution of the present invention, the conveying pipe is a hollow pipe, the conveying pipe runs through the first blocking ring and the second blocking ring, the outer diameter of the second spherical valve is larger than the inner diameter of the conveying pipe, and the second The ball valve plays the role of closing and opening the conveying pipe.

As a preferred technical solution of the present invention, the liquid outlet structure includes a second piston pad, a first circular hole, a movable turntable, a second circular hole, a third piston pad, a third circular hole, a needle connecting pipe, a drive rod and a drive Motor, the outer diameter of the second piston pad matches the inner diameter of the cylinder, the second piston pad, the movable turntable and the third piston pad are closely connected, and the second piston pad slides with the cylinder Connection, the inner wall of the needle connecting pipe is provided with threads, the first round hole, the second round hole, the third round hole and the needle connecting pipe are vertically distributed up and down, and the first round hole, the second round hole and the third round hole are formed It acts as a liquid circulation channel, and the second piston pad slides up and down to adjust the opening and closing of the second ball valve.

As a preferred technical solution of the present invention, the movable turntable and the third piston pad are sleeved on the outer wall of the drive rod, the movable turntable and the third piston pad are slidably connected to the drive rod, and the movable turntable acts to block or conduct the needle connecting pipe effect.

As a preferred technical solution of the present invention, the output end of the drive motor is fixedly connected to the drive rod, the drive motor is fixedly mounted on the upper surface of the base, the drive motor is electrically connected to an external computer, and the drive motor can be controlled by an external computer The rotation speed is adjusted to adjust the passage time of the liquid through the first circular hole, the second circular hole and the third circular hole.

Compared with the prior art, the present invention provides a cut-off single droplet generating device, which has the following beneficial effects:

1. The present invention proposes that the cut-off single droplet generating device can directly add liquid through the liquid injection port, and drive the first piston gasket and the second piston gasket to slide up and down inside the cylinder by pressing the liquid injection pipe and the third piston gasket, Thereby, the first ball valve and the second ball valve are opened to supply liquid to the remaining cavities to ensure sufficient liquid.

2. The cut-off single droplet generating device proposed by the present invention can assemble needles of different diameters by arranging threads inside the needle connecting pipe, so as to meet the requirements of different droplet particle sizes;

3. The cut-off single droplet generation device proposed by the present invention controls the droplet passage time by adjusting the rotating speed of the movable turntable. The liquid forms a single droplet at the needle through the needle connecting tube, and drops under the action of gravity to realize the release of the single droplet. Different from the problem of uneven particle size in the drive-type controlled liquid discharge in the prior art, it has wide application prospects.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the liquid inlet structure schematic diagram of the present invention;

Fig. 3 is the schematic diagram of the one-way conduction device of the present invention;

Figure 4 is a schematic diagram of the liquid outlet structure of the present invention.

In the figure: 1. cylinder body; 2. liquid inlet structure; 201, liquid injection pipe; 202, liquid inlet; 203, connecting pipe; 204, first ball valve; 205, first liquid outlet pipe; 206, first Piston pad; 3. First return spring; 4. One-way conduction device; 401, First blocking ring; 402, Second blocking ring; 403, Delivery pipe; 404, Second ball valve; 5, Second return spring; 6. Liquid outlet structure; 601, second piston pad; 602, first round hole; 603, movable turntable; 604, second round hole; 605, third piston pad; 606, third round hole; 607, needle connection Tube; 608, drive rod; 609, drive motor; 7, support plate; 8, base.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

Please refer to Fig. 1-2, a cut-off single droplet generating device includes a cylinder body 1, a liquid inlet structure 2 is arranged inside the cylinder body 1, and the liquid inlet structure 2 includes a liquid injection pipe 201, a liquid inlet port 202, a connecting pipe 203. The first ball valve 204, the first liquid outlet pipe 205 and the first piston pad 206, the liquid injection pipe 201, the liquid inlet 202, the connecting pipe 203, the first liquid outlet pipe 205 and the first piston pad 206 are all connected state, the outer diameter of the first ball valve 204 is larger than the inner diameter of the first liquid outlet pipe 205, the liquid injection pipe 201 is slidably connected to the cylinder 1; the outer diameter of the first piston gasket 206 is the same as the inner diameter of the cylinder 1 Matching, the first piston pad 206 is slidably connected to the cylinder body 1 , and the first piston pad 206 moves up and down to increase the internal pressure of the cylinder body 1 , thereby opening or closing the first spherical valve 204 .

Embodiment 2:

Please refer to FIG. 3 , on the basis of Embodiment 1, the bottom of the liquid inlet structure 2 is provided with a first return spring 3 , and the side of the first return spring 3 away from the liquid inlet structure 2 is provided with a one-way conduction device 4 , and the one-way conduction The device 4 includes a first clogging ring 401, a second clogging ring 402, a delivery pipe 403 and a second ball valve 404. The outer diameters of the first clogging ring 401 and the second clogging ring 402 match the inner diameter of the cylinder 1 , the first blocking ring 401 and the second blocking ring 402 are fixedly connected with the cylinder body 1 , the first blocking ring 401 and the second blocking ring 402 cooperate with the first piston pad 206 and the second piston pad 601 to increase the internal pressure of the cylinder body 1 The conveying pipe 403 is a hollow pipe, the conveying pipe 403 runs through the first blocking ring 401 and the second blocking ring 402, the outer diameter of the second ball valve 404 is larger than the inner diameter of the conveying pipe 403, and the second ball valve 404 plays the role of The function of closing and opening of the delivery pipe 403 .

Embodiment three:

Referring to FIG. 4 , on the basis of Embodiment 1, a second return spring 5 is provided on the side of the one-way conduction device 4 away from the first return spring 3 , and the second return spring 5 is arranged at a side away from the one-way conduction device 4 There is a liquid outlet structure 6, a support plate 7 is fixedly installed at the bottom of the cylinder 1, a base 8 is fixedly installed at the bottom of the support plate 7, and the liquid outlet structure 6 includes a second piston pad 601, a first circular hole 602, a movable turntable 603, a second The circular hole 604, the third piston pad 605, the third circular hole 606, the needle connecting tube 607, the driving rod 608 and the driving motor 609, the outer diameter of the second piston pad 601 matches the inner diameter of the cylinder 1, the second The piston pad 601, the movable turntable 603 and the third piston pad 605 are closely connected, the second piston pad 601 is slidably connected with the cylinder 1, the inner wall of the needle connecting tube 607 is provided with threads, the first circular hole 602, the second circular hole 604 , the third round hole 606 and the needle connecting tube 607 are vertically distributed up and down, the first round hole 602, the second round hole 604 and the third round hole 606 constitute the function of the liquid circulation channel, and the second piston pad 601 slides up and down to make the Play the role of adjusting the opening and closing of the second spherical valve 404; the movable turntable 603 and the third piston pad 605 are sleeved on the outer wall of the drive rod 608, the movable turntable 603 and the third piston pad 605 are slidably connected with the drive rod 608, and the movable turntable 608 603 plays the role of blocking or conducting the needle connecting tube 607; the output end of the driving motor 609 is fixedly connected with the driving rod 608, the driving motor 609 is fixedly installed on the upper surface of the base 8, the driving motor 609 is electrically connected with the external computer, and the driving motor 609 can control the rotation speed through an external computer, so as to adjust the passage time of the liquid passing through the first circular hole 602 , the second circular hole 604 and the third circular hole 606 .

The working principle and use process of the present invention: the cut-off single droplet generating device, before working, pours liquid into the liquid injection pipe 201 through the liquid inlet 202, and starts the driving motor 609 to drive the movable turntable 603 to rotate, thereby closing the The needle is connected to the tube 607, and then the first piston pad 206 can be pressed down, and the first return spring 3 is squeezed. At this time, the pressure at the bottom of the first piston pad 206 increases, the first ball valve 204 is pushed open, and the injection tube 201 The internal liquid flows downward along the connecting pipe 203 and the first liquid outlet pipe 205. When the liquid replenishment is completed, the first return spring 3 returns to its original state, and the first piston pad 206 moves up under the action of the elastic potential energy of the first return spring 3. The pressure at the bottom of a piston pad 206 is reduced, the first ball valve 204 closes the first liquid outlet pipe 205, and then the second piston pad 601 can be pushed up by pressing the third piston pad 605 upward, and the second return spring 5 is squeezed , the pressure above the second piston pad 601 increases, the second ball valve 404 is pushed open, and the liquid moves downward along the delivery pipe 403. When the liquid replenishment is completed, the second return spring 5 returns to its original state, and the elastic potential energy is converted into kinetic energy to drive the first The second piston pad 601 moves downward, thereby reducing the pressure above the second piston pad 601, so that the second ball valve 404 closes the conveying pipe 403, and then the drive motor 609 can be activated by an external computer, and the drive rod 608 drives the movable turntable 603 and the third piston The pad 605 rotates so that the first circular hole 602 , the second circular hole 604 , the third circular hole 606 and the needle connecting tube 607 are in a conducting state, so that the liquid is discharged through the needle connecting tube 607 to discharge a single droplet.

It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A cut-off single droplet generating device, characterized in that: it comprises a cylindrical body (1), the interior of the cylindrical body (1) is provided with a liquid feeding structure (2), and the bottom of the liquid feeding structure (2) is provided with There is a first return spring (3), one side of the first return spring (3) away from the liquid inlet structure (2) is provided with a one-way conducting device (4), and the one-way conducting device (4) is far away from the first One side of the return spring (3) is provided with a second return spring (5), and the side of the second return spring (5) away from the one-way conduction device (4) is provided with a liquid outlet structure (6). A support plate (7) is fixedly installed at the bottom of the body (1), and a base (8) is fixedly installed at the bottom of the support plate (7). 2. A cut-off single droplet generating device according to claim 1, characterized in that: the liquid inlet structure (2) comprises a liquid injection pipe (201), a liquid inlet (202), a connecting pipe (203) ), the first ball valve (204), the first liquid outlet pipe (205) and the first piston gasket (206), the liquid injection pipe (201), the liquid inlet (202), the connecting pipe (203), the first Both a liquid outlet pipe (205) and the first piston gasket (206) are in a connected state, the outer diameter of the first spherical valve (204) is larger than the inner diameter of the first liquid outlet pipe (205), and the liquid injection The pipe (201) is slidably connected with the cylinder body (1). 3. A cut-off single droplet generating device according to claim 2, characterized in that: the outer diameter of the first piston pad (206) matches the inner diameter of the cylinder (1), and the The first piston pad (206) is slidably connected with the cylinder body (1). 4. A cut-off single droplet generating device according to claim 1, characterized in that: the one-way conduction device (4) comprises a first blocking ring (401), a second blocking ring (402), a transporting The pipe (403) and the second ball valve (404), the outer diameters of the first blocking ring (401) and the second blocking ring (402) match the inner diameter of the cylinder (1), the A blocking ring (401) and a second blocking ring (402) are fixedly connected with the cylinder body (1). 5. A cut-off single droplet generating device according to claim 4, characterized in that: the conveying pipe (403) is a hollow pipe, and the conveying pipe (403) penetrates through the first blocking ring (401) and the For the second blocking ring (402), the outer diameter of the second ball valve (404) is larger than the inner diameter of the delivery pipe (403). 6. A cut-off single droplet generating device according to claim 1, characterized in that: the liquid outlet structure (6) comprises a second piston pad (601), a first circular hole (602), a movable turntable (603), the second circular hole (604), the third piston pad (605), the third circular hole (606), the needle connecting tube (607), the driving rod (608) and the driving motor (609), the The outer diameter of the second piston pad (601) matches the inner diameter of the cylinder (1), the second piston pad (601), the movable turntable (603) and the third piston pad (605) are closely connected, The second piston pad (601) is slidably connected with the cylinder body (1), the inner wall of the needle connecting pipe (607) is provided with threads, the first circular hole (602), the second circular hole (604), the third circular hole (604), the The hole (606) and the needle connecting tube (607) are vertically distributed up and down. 7. A cut-off single droplet generating device according to claim 6, characterized in that: the movable turntable (603) and the third piston pad (605) are sleeved on the outer wall of the drive rod (608), and the The movable turntable (603) and the third piston pad (605) are slidably connected with the drive rod (608). 8. A cut-off single droplet generating device according to claim 6, characterized in that: the output end of the drive motor (609) is fixedly connected to the drive rod (608), and the drive motor (609) is fixed The upper surface of the base (8) is installed, and the drive motor (609) is electrically connected to an external computer. 9. A cut-off single droplet generating device according to any one of claims 1-8, further comprising a method for using the cut-off single droplet generating device, the specific steps of which are: Before working, pour liquid into the liquid injection pipe (201) through the liquid inlet (202), and start the drive motor (609) to drive the movable turntable (603) to rotate, thereby closing the needle connecting pipe (607), and then press down The first piston pad (206) and the first return spring (3) are squeezed. At this time, the pressure at the bottom of the first piston pad (206) increases, the first ball valve 204 is pushed open, and the liquid inside the injection pipe 201 is connected along the The pipe (203) and the first liquid outlet pipe (205) flow downward, and when the liquid replenishment is completed, the first return spring (3) returns to its original state, and the elastic potential energy of the first piston pad (206) in the first return spring (3) The pressure at the bottom of the first piston pad (206) decreases, the first ball valve (204) closes the first liquid outlet pipe (205), and then the third piston pad (605) can be pushed up to push the second piston pad (605). The piston pad (601) moves up, the second return spring (5) is squeezed, the pressure above the second piston pad (601) increases, the second ball valve (404) is pushed open, and the liquid flows along the delivery pipe 403. When the second return spring (5) returns to its original state after the liquid replenishment is completed, the elastic potential energy is converted into kinetic energy to drive the second piston pad (601) to move downward, thereby reducing the pressure above the second piston pad (601), so that the second sphere The valve (404) closes the delivery pipe (403), and then the drive motor (609) can be activated by an external computer, and the drive rod (608) drives the movable turntable (603) and the third piston pad (605) to rotate, so that the first circular hole ( 602), the second round hole (604), the third round hole (606) and the needle connecting pipe (607) are in a conducting state, so that the liquid can discharge a single droplet through the needle connecting pipe (607).

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