Liquid conveying mechanism capable of accurately adjusting output quantity

Abstract

The utility model discloses a liquid delivery mechanism capable of accurately adjusting output quantity, which comprises a material cylinder, a piston, a communication valve, a feed pipe and a discharge pipe, the piston is positioned in the material cylinder and slides along the inner wall of the material cylinder, the piston divides the inner cavity of the material cylinder into a first material cylinder cavity and a second material cylinder cavity which are mutually isolated and sealed, the feed pipe is communicated with the first material cylinder cavity, and the discharge pipe is communicated with the second material cylinder cavity. The discharging pipe is communicated with the material cylinder second cavity, the material cylinder first cavity and the material cylinder second cavity are communicated through a communicating valve, when the piston moves in the direction close to the material cylinder first cavity, the communicating valve is opened, and the piston presses materials in the material cylinder first cavity into the material cylinder second cavity through the communicating valve; when the piston moves in the direction close to the second cavity of the material cylinder, the communicating valve is closed, and the piston discharges materials in the second cavity of the material cylinder from the discharging pipe. The amount of materials discharged by the material cylinder is accurately controlled by controlling the displacement of the piston. And the servo motor is used for driving, and the servo motor can perform accurate control, so that the quantity of the materials discharged by the material cylinder is further accurately controlled.

Description

Technical Field

[0001] The utility model relates to a liquid conveying mechanism, in particular to a liquid conveying mechanism for precisely adjusting the output volume. Background Art

[0002] With the rapid development of mechanical industry technology, devices with a function of quantitatively outputting liquid are widely used in various machines. At present, commonly used quantitative liquid output devices generally adopt a structure combining a liquid pump and a water meter. The water meter is used to monitor the water extraction volume of the liquid pump, so as to realize the function of extracting a certain amount of liquid into a container. This kind of quantitative liquid output device can meet the requirements of rapid output of a large amount of liquid, but has poor control over the accuracy of the liquid output volume and is difficult to meet the requirements of accurate quantitative output of a small amount of liquid. Content of the Utility Model

[0003] Purpose of the utility model: Aiming at the above disadvantages, the utility model provides a liquid conveying mechanism for precisely controlling the quantitative output of liquid.

[0004] Technical solution: To solve the above problems, the utility model adopts a liquid conveying mechanism for precisely adjusting the output volume, including a material cylinder, a piston, a connecting valve, a feed pipe and a discharge pipe. The piston is located in the material cylinder and slides along the inner wall of the material cylinder. The piston divides the inner cavity of the material cylinder into a mutually isolated and sealed first cavity and a second cavity of the material cylinder. The feed pipe is communicated with the first cavity of the material cylinder, and the feed pipe is used to introduce materials into the first cavity of the material cylinder. The discharge pipe is communicated with the second cavity of the material cylinder, and the discharge pipe is used to discharge materials from the second cavity of the material cylinder. The first cavity and the second cavity of the material cylinder are communicated through the connecting valve. When the piston moves in the direction close to the first cavity of the material cylinder, the connecting valve opens, and the piston presses the materials in the first cavity of the material cylinder into the second cavity of the material cylinder through the connecting valve. When the piston moves in the direction close to the second cavity of the material cylinder, the connecting valve closes, and the piston discharges the materials in the second cavity of the material cylinder from the discharge pipe.

[0005] Further, the first cavity of the material cylinder is located below the second cavity of the material cylinder. When the piston moves downward, the connecting valve opens, and the piston presses the materials in the first cavity of the material cylinder into the second cavity of the material cylinder through the connecting valve. When the piston moves upward, the connecting valve closes, and the piston discharges the materials in the second cavity of the material cylinder from the discharge pipe.

[0006] Further, the piston is connected with a piston rod. One end of the piston rod is located in the material cylinder, and one end of the piston rod is connected with a driving device. The driving device is used to drive the piston to move upward or downward in the material cylinder through the piston rod.

[0007] Further, the driving device includes a lead screw sleeve rod fixedly connected with the piston rod. The lead screw sleeve rod is spirally sleeved outside the ball screw. When the ball screw rotates, it drives the lead screw sleeve rod to move axially along the ball screw.

[0008] Further, the piston rod is connected to the screw rod sleeve through a connecting flange.

[0009] Further, the driving device further includes a driving motor and a gear set. The gear set includes a driving gear and a driven gear that mesh with each other. The driven gear is fixedly connected to the ball screw. The driving motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate, thereby driving the ball screw to rotate. The driving motor and the driving gear are connected through a speed reducer.

[0010] Further, it further includes a mounting frame for mounting various components. The ball screw is positioned by bearings, and the bearings are mounted on the mounting frame through bearing seats.

[0011] Beneficial effects: Compared with the prior art, the advantage of the present utility model is that by controlling the piston displacement, the amount of material discharged from the material cylinder is accurately controlled. Driven by a servo motor, since the servo motor can be accurately controlled, the amount of material discharged from the material cylinder is further accurately controlled. Description of the Drawings

[0012] Figure 1 is the overall structural schematic diagram of the liquid conveying mechanism in the present utility model.

[0013] Figure 2 is the schematic diagram of the cooperation between the material cylinder and the piston in the present utility model. Detailed Embodiments

[0014] As Figure 1 and Figure 2 shown, a liquid conveying mechanism for precisely adjusting the output in this embodiment includes a material cylinder 2, a piston 14, a communication valve 13, a feed pipe 12, and a discharge pipe 1. Each component is mounted on a mounting frame 11. The piston is located inside the material cylinder 2 and slides along the inner wall of the material cylinder 2. The piston divides the inner cavity of the material cylinder 2 into a mutually isolated and sealed first material cylinder chamber 21 and a second material cylinder chamber 22. The feed pipe is communicated with the first material cylinder chamber 21. The feed pipe 12 is used to feed materials into the first material cylinder chamber. The discharge pipe 1 is communicated with the second material cylinder chamber. The discharge pipe 1 is used to discharge materials from the second material cylinder chamber. The first material cylinder chamber and the second material cylinder chamber are communicated through the communication valve 13. The first material cylinder chamber is located below the second material cylinder chamber. When the piston moves downward, the communication valve opens, and the piston presses the materials in the first material cylinder chamber into the second material cylinder chamber through the communication valve. When the piston moves upward, the communication valve closes, and the piston discharges the materials in the second material cylinder chamber from the discharge pipe.

[0015] The piston is connected to a piston rod 3. One end of the piston rod 3 is located inside the material cylinder. One end of the piston rod 3 is connected to a driving device, and the driving device is used to drive the piston to move up or down in the material cylinder through the piston rod 3. The driving device includes a lead screw sleeve rod 5 fixedly connected to the piston rod 3, a driving motor 10, and a gear set 8. The piston rod 3 is connected to the lead screw sleeve rod 5 through a connecting flange 4. The lead screw sleeve rod 5 is helically sleeved outside the ball screw 6. The ball screw 6 is positioned by bearings, and the bearings are installed on the mounting frame through bearing seats 7. When the ball screw 6 rotates, it drives the lead screw sleeve rod 5 to move axially along the ball screw 6.

[0016] The gear set 8 includes a driving gear and a driven gear that mesh with each other. The driven gear is fixedly connected to the ball screw. A speed reducer 9 is connected between the driving motor 10 and the driving gear. The driving motor 10 drives the driving gear to rotate through the speed reducer 9. The driving gear drives the driven gear to rotate, thereby driving the ball screw 6 to rotate.

[0017] The feed pipe is connected to the lower chamber of the material cylinder, and the liquid material enters the lower chamber of the material cylinder from the feed pipe. After the servo motor increases the torque through the speed reducer and the gear set, it drives the ball screw to rotate, pushes the piston rod downward through the lead screw sleeve rod, and at the same time opens the connecting valve to fill the material in the lower chamber into the upper chamber of the material cylinder. After closing the connecting valve, the piston moves upward to discharge the material in the upper chamber of the material cylinder through the discharge pipe for filling. Since the servo motor can be precisely controlled, the amount of material discharged from the upper chamber of the material cylinder can be precisely controlled.

Claims

1. A liquid delivery mechanism for accurately adjusting the output volume, characterized in that: The invention comprises a material cylinder (2), a piston, a connecting valve (13), a feed pipe (12) and a discharge pipe (1), wherein the piston is located in the material cylinder (2) and slides along the inner wall of the material cylinder (2), and the piston divides the inner cavity of the material cylinder (2) into a first cavity and a second cavity of the material cylinder which are isolated and sealed from each other, the feed pipe is connected to the first cavity of the material cylinder, the feed pipe (12) is used to pass the material into the first cavity of the material cylinder, the discharge pipe (1) is connected to the second cavity of the material cylinder, and the discharge pipe (1) is used to discharge the material from the second cavity of the material cylinder, the first cavity of the material cylinder and the second cavity of the material cylinder are connected via the connecting valve (13), when the piston moves in a direction close to the first cavity of the material cylinder, the connecting valve opens, and the piston presses the material in the first cavity of the material cylinder into the second cavity of the material cylinder through the connecting valve; when the piston moves in a direction close to the second cavity of the material cylinder, the connecting valve closes, and the piston discharges the material in the second cavity of the material cylinder from the discharge pipe.

2. The liquid delivery mechanism according to claim 1, characterized in that: The first chamber of the material cylinder is located below the second chamber of the material cylinder. When the piston moves downward, the connecting valve opens, and the piston presses the material in the first chamber of the material cylinder into the second chamber of the material cylinder through the connecting valve; when the piston moves upward, the connecting valve closes, and the piston discharges the material in the second chamber of the material cylinder from the discharge pipe.

3. The liquid delivery mechanism according to claim 2, characterized in that: The piston is connected to a piston rod (3), one end of the piston rod (3) is located in the material cylinder, and one end of the piston rod (3) is connected to a driving device, and the driving device is used to drive the piston to move upward or downward in the material cylinder through the piston rod (3).

4. The liquid delivery mechanism according to claim 3, characterized in that: The driving device comprises a screw sleeve (5) fixedly connected to the piston rod (3); the screw sleeve (5) is spirally sleeved on the outside of the ball screw (6); when the ball screw (6) rotates, the screw sleeve (5) is driven to move axially along the ball screw (6).

5. The liquid delivery mechanism according to claim 4, characterized in that: The piston rod (3) is connected to the screw sleeve rod (5) via a connecting flange (4).

6. The liquid delivery mechanism according to claim 4, characterized in that: The driving device further comprises a driving motor (10) and a gear set (8), wherein the gear set (8) comprises a driving gear and a driven gear meshing with each other, wherein the driven gear is fixedly connected to the ball screw, and the driving motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate, thereby driving the ball screw (6) to rotate.

7. The liquid delivery mechanism according to claim 6, characterized in that: The driving motor (10) and the driving gear are connected via a speed reducer (9).

8. The liquid delivery mechanism according to claim 5, characterized in that: It also includes a mounting frame for mounting various components, the ball screw (6) is positioned by a bearing, and the bearing is mounted on the mounting frame through a bearing seat.

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