Metering pump with adjustable discharge

Abstract

The utility model relates to the technical field of metering pump provides the metering pump of adjustable ejection, including bottom plate, the one side of bottom plate top installs the casing, the one side of casing installs the connecting pipe, the inside installation of casing has the metering structure, the metering structure includes the first motor fixed in the casing top, the one side of inside of casing installs the worm, the one side of worm installs the first rotating shaft, the outside fixed of first rotating shaft has worm wheel, the bottom of inside of casing installs the adjusting structure, the adjusting structure includes the air hole of setting in the one end outside of plunger, the one side of plunger outside casing inside is provided with the moving block. The utility model is provided with adjusting structure, and the meshing transmission adjustment moving block position is changed through gear and tooth, changes plunger effective stroke and air hole opening and closing degree, and the equidistance distribution design of first through hole and second through hole can be combined, and the flow demand under different scenes can be matched flexibly.

Description

Technical Field

[0001] This utility model relates to the field of metering pump technology, and in particular to a metering pump with adjustable discharge volume. Background Technology

[0002] As a key piece of equipment capable of precisely controlling the flow rate of fluids, the performance of metering pumps directly affects the stability of the production process, product quality, and resource utilization efficiency.

[0003] The existing metering pumps use a manual mechanical adjustment structure, which adjusts the discharge volume by manually turning the adjustment knob to change the plunger stroke or eccentricity. During the adjustment process, repeated shutdowns and calibrations are required, which seriously affects the continuity of production and increases labor and time costs. Utility Model Content

[0004] The purpose of this invention is to provide a metering pump with adjustable discharge volume to solve the problem that existing metering pumps are not easy to automatically adjust.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a metering pump with adjustable discharge volume, including a base plate;

[0006] A housing is installed on one side of the top of the base plate, a connecting pipe is installed on one side of the housing, a metering structure is installed inside the housing, the metering structure includes a first motor fixed to the top of the housing, a worm gear is installed on one side of the inside of the housing, a first rotating shaft is installed on one side of the worm gear, a worm wheel is fixed on the outside of the first rotating shaft, an eccentric wheel is fixed on the outside of the first rotating shaft at one end of the worm wheel, and a plunger is installed on one side of the eccentric wheel;

[0007] An adjustment structure is installed at the bottom of the housing. The adjustment structure includes an air hole located on the outside of one end of the plunger. A movable block is provided on one side of the housing inside the outer side of the plunger, and a movable plate is fixed to the bottom side of the movable block.

[0008] Preferably, a support block is fixed to one side of the inside of the connecting pipe, a first spring is installed on one side of the inside of the plunger, a first partition is fixed to the other side of the inside of the connecting pipe, a first through hole is provided inside the first partition, a groove is provided at one end of the first partition, a movable rod is installed inside the first partition, a second spring is installed on the outside of the movable rod, a diaphragm is installed at one end of the movable rod, a second partition is fixed to the inside of the connecting pipe at one end of the diaphragm, a second through hole is provided inside the second partition, one-way valves are installed on both sides of the inside of the connecting pipe, an inlet pipe is fixed to one side of the connecting pipe, and an outlet pipe is fixed to the other side of the connecting pipe.

[0009] Preferably, the worm and the worm wheel are meshed, the outer side of the eccentric wheel abuts against one end of the plunger, the support block has a through groove inside, and the plunger is slidably connected inside the support block.

[0010] With the above structure, the through groove inside the support block guides and limits the plunger during use. When the plunger slides in the through groove, the through groove can constrain the plunger's movement trajectory, preventing it from deviating, shaking, or getting stuck during reciprocating motion, and ensuring that the plunger always moves stably in the preset direction.

[0011] Preferably, the plunger and the first partition plate form a telescopic structure through a first spring, the first through holes are evenly distributed inside the first partition plate, the diaphragm is conical, one end of the diaphragm abuts against one end of the second partition plate, the second through holes are evenly distributed inside the second partition plate, and the inlet pipe and outlet pipe are symmetrically distributed on both sides of one end of the connecting pipe.

[0012] With the above structure, the elastic buffering effect of the first spring can reduce mechanical impact during use, ensuring the smoothness and continuity of the plunger's reciprocating motion, and avoiding motion jamming or component wear caused by rigid transmission.

[0013] Preferably, the top of the movable plate is fixed with teeth, a second rotating shaft is installed inside the housing, a gear is fixed on the outside of the second rotating shaft, and a second motor is fixed at one end of the second rotating shaft on the outside of the housing.

[0014] Preferably, the air holes are evenly distributed on the outer side of one end of the plunger, the moving block is slidably connected to the outer side of the air holes, and the moving plate is arranged in an "L" shape.

[0015] With the above structure, the vents are evenly distributed on the outer side of one end of the plunger during use, providing a basis for graded control of pressure compensation. When the moving block slides outside the vents, the pressure exchange area between the plunger and the outside environment during the reciprocating motion can be precisely changed by covering or exposing different numbers of vents.

[0016] Preferably, the teeth are evenly spaced at the top of the moving plate, and the gear and the moving plate are meshed together by the teeth.

[0017] With the above structure, when the second motor drives the gear to rotate during use, the moving plate can generate a corresponding fixed distance displacement in the horizontal direction for every tooth pitch rotated by the gear. This ensures that the displacement of the moving plate has a precise linear correspondence with the rotation angle of the gear, providing a basis for the precise adjustment of the output amount.

[0018] The adjustable discharge metering pump provided by this utility model has the following advantages:

[0019] By incorporating a metering structure and employing a worm gear and worm wheel meshing transmission method to drive the plunger movement, high transmission accuracy and strong stability are achieved, effectively reducing the impact of mechanical vibration on metering accuracy. Simultaneously, the plunger and the first partition plate form a telescopic structure through the first spring. Under the alternating action of the eccentric wheel thrust and the spring force, the reciprocating motion of the plunger is ensured to be smooth and orderly. Combined with the one-way conduction characteristic of the one-way valve, liquid backflow is prevented, further ensuring the accuracy and consistency of the metering process.

[0020] By incorporating an adjustable structure, the position of the moving block is adjusted through the meshing transmission of gears and teeth, thereby changing the effective stroke of the plunger and the opening and closing degree of the air hole. Combined with the equidistant distribution design of the first and second through holes, it can flexibly match the flow requirements under different scenarios. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0023] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0024] Figure 4 This is a three-dimensional cross-sectional structural diagram of the connecting pipe of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the adjustment structure of this utility model.

[0026] The following are the annotations in the figure: 1. Base plate; 2. Housing; 3. Connecting pipe; 4. Metering structure; 401. First motor; 402. Worm gear; 403. First rotating shaft; 404. Worm wheel; 405. Eccentric wheel; 406. Piston; 407. Support block; 408. First spring; 409. First partition; 410. First through hole; 411. Groove; 412. Movable rod; 413. Second spring; 414. Diaphragm; 415. Second partition; 416. Second through hole; 417. One-way valve; 418. Inlet pipe; 419. Outlet pipe; 5. Adjustment structure; 501. Air hole; 502. Moving block; 503. Moving plate; 504. Gear; 505. Second rotating shaft; 506. Gear; 507. Second motor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 The metering pump with adjustable discharge volume provided by this utility model includes a base plate 1.

[0029] Reference Figures 1-4 As shown, a housing 2 is installed on one side of the top of the base plate 1, and a connecting pipe 3 is installed on one side of the housing 2. A metering structure 4 is installed inside the housing 2. The metering structure 4 includes a first motor 401 fixed to the top of the housing 2. A worm gear 402 is installed on one side of the inside of the housing 2. A first rotating shaft 403 is installed on one side of the worm gear 402. A worm wheel 404 is fixed to the outside of the first rotating shaft 403. An eccentric wheel 405 is fixed to the outside of the first rotating shaft 403 at one end of the worm wheel 404. A plunger 406 is installed inside the connecting pipe 3. A support block 407 is fixed to one side inside the connecting pipe 3. A first spring 408 is installed to one side inside the plunger 406. A first partition 409 is fixed to the other side inside the connecting pipe 3. A first through hole 410 is provided inside the first partition 409. A groove 411 is provided at one end of the first partition 409. A movable rod 412 is installed inside the first partition 409. A second spring 413 is installed on the outside of the movable rod 412. A [missing information - likely a device or component] is installed at one end of the movable rod 412. A diaphragm 414 is connected to a connecting pipe 3 at one end, and a second partition 415 is fixed inside the connecting pipe 3. The second partition 415 has a second through hole 416 inside. One-way valves 417 are installed on both sides of the connecting pipe 3. An inlet pipe 418 is fixed to one side of the connecting pipe 3, and an outlet pipe 419 is fixed to the other side. A worm gear 402 is meshed with a worm wheel 404. The outer side of the eccentric wheel 405 abuts against one end of the plunger 406. A through groove is provided inside the support block 407. The plunger 406 is slidably connected inside the support block 407. The plunger 406 and the first partition 409 form a telescopic structure through the first spring 408. The first through holes 410 are evenly distributed inside the first partition 409. The diaphragm 414 is conical. One end of the diaphragm 414 abuts against one end of the second partition 415. The second through holes 416 are evenly distributed inside the second partition 415. The inlet pipe 418 and the outlet pipe 419 are symmetrically distributed on both sides of one end of the connecting pipe 3.

[0030] The first motor 401 is started to drive the worm gear 402 to rotate. Since the worm gear 402 is meshed with the worm wheel 404, it drives the worm wheel 404 to rotate synchronously with the first shaft 403. As a result, the outer side of the first shaft 403 rotates with the first shaft 403. Due to the eccentric design of the eccentric wheel, its outer side continuously abuts against one end of the plunger 406, pushing the plunger to slide back and forth along the through groove inside the support block 407. Simultaneously, the plunger 406 and the first partition 409 form a telescopic structure via the first spring 408. Under the alternating action of the thrust of the eccentric wheel 405 and the elasticity of the first spring 408, the plunger 406 achieves stable reciprocating motion. When the plunger 406 moves into the connecting pipe 3, the space inside the first partition 409 increases, creating a negative pressure. At this time, the one-way valve 417 on one side of the connecting pipe 3 opens, and the liquid enters the connecting pipe through the inlet pipe 418 and fills the diaphragm 414 side through the first through hole 410 on the first partition 409. When the plunger 406 moves in the opposite direction, the pressure inside the first partition 409 increases, pushing the movable rod 412 to compress the second spring 413, causing the conical diaphragm 414 to abut against the second partition 415. At this time, the one-way valve on the inlet pipe side closes, and the liquid is discharged through the second through hole 416 on the second partition 415 and the outlet pipe 419, completing one pumping cycle.

[0031] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, an adjustment structure 5 is installed at the bottom of the housing 2. The adjustment structure 5 includes an air hole 501 located on the outer side of one end of the plunger 406. A moving block 502 is located on one side of the housing 2 outside the plunger 406. A moving plate 503 is fixed to the bottom side of the moving block 502. A tooth 504 is fixed to the top of the moving plate 503. A second rotating shaft 505 is installed inside the housing 2. A gear 506 is fixed to the outer side of the second rotating shaft 505. A second motor 507 is fixed to one end of the second rotating shaft 505 outside the housing 2. The air holes 501 are evenly distributed on the outer side of one end of the plunger 406. The moving block 502 is slidably connected to the outer side of the air holes 501. The moving plate 503 is arranged in an "L" shape. The tooth 504 is evenly distributed on the top of the moving plate 503. The gear 506 and the moving plate 503 are meshed together through the tooth 504.

[0032] The second motor 507 is activated to drive the second rotating shaft 505 and the outer gear 506 to rotate. Since the gear 506 is meshed with the teeth 504 at the top of the moving plate 503, the rotation of the gear is converted into the horizontal movement of the moving plate 503, which in turn drives the moving block 502 fixed to it to move synchronously. By adjusting the position of the moving block 502, the opening and closing degree of the vent of the plunger 406 is changed during the movement. At the same time, the change in the position of the moving block 502 indirectly changes the effective stroke of the plunger 406. Combined with the equidistant distribution design of the first through hole 410 and the second through hole 416, the liquid output per unit time can be continuously adjusted to meet the metering requirements under different working conditions.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metering pump with adjustable discharge volume, including a base plate (1); Its features are: A housing (2) is installed on one side of the top of the base plate (1), a connecting pipe (3) is installed on one side of the housing (2), a metering structure (4) is installed inside the housing (2), the metering structure (4) includes a first motor (401) fixed to the top of the housing (2), a worm (402) is installed on one side of the inside of the housing (2), a first rotating shaft (403) is installed on one side of the worm (402), a worm wheel (404) is fixed on the outside of the first rotating shaft (403), an eccentric wheel (405) is fixed on the outside of the first rotating shaft (403) at one end of the worm wheel (404), and a plunger (406) is installed on one side of the eccentric wheel (405). An adjustment structure (5) is installed at the bottom of the housing (2). The adjustment structure (5) includes an air hole (501) located on the outside of one end of the plunger (406). A moving block (502) is provided on one side of the housing (2) outside the plunger (406). A moving plate (503) is fixed on the bottom side of the moving block (502).

2. The metering pump with adjustable discharge volume according to claim 1, characterized in that: A support block (407) is fixed to one side inside the connecting pipe (3), a first spring (408) is installed to one side inside the plunger (406), and a first partition (409) is fixed to the other side inside the connecting pipe (3). A first through hole (410) is provided inside the first partition (409), and a groove (411) is provided at one end of the first partition (409). A movable rod (412) is installed inside the first partition (409), and the outer side of the movable rod (412) is... A second spring (413) is installed, a diaphragm (414) is installed at one end of the movable rod (412), a second partition (415) is fixed inside the connecting pipe (3) at one end of the diaphragm (414), a second through hole (416) is provided inside the second partition (415), a one-way valve (417) is installed on both sides inside the connecting pipe (3), an inlet pipe (418) is fixed on one side of the connecting pipe (3), and an outlet pipe (419) is fixed on the other side of the connecting pipe (3).

3. The metering pump with adjustable discharge volume according to claim 2, characterized in that: The worm (402) is meshed with the worm wheel (404), the outer side of the eccentric wheel (405) abuts against one end of the plunger (406), the support block (407) is provided with a through groove, and the plunger (406) is slidably connected inside the support block (407).

4. The metering pump with adjustable discharge volume according to claim 2, characterized in that: The plunger (406) and the first partition (409) form a telescopic structure through the first spring (408). The first through holes (410) are evenly distributed inside the first partition (409). The diaphragm (414) is conical. One end of the diaphragm (414) abuts against one end of the second partition (415). The second through holes (416) are evenly distributed inside the second partition (415). The inlet pipe (418) and the outlet pipe (419) are symmetrically distributed on both sides of one end of the connecting pipe (3).

5. The metering pump with adjustable discharge volume according to claim 1, characterized in that: The top of the movable plate (503) is fixed with teeth (504), the inside of the housing (2) is equipped with a second rotating shaft (505), the outside of the second rotating shaft (505) is fixed with a gear (506), and one end of the second rotating shaft (505) on the outside of the housing (2) is fixed with a second motor (507).

6. The metering pump with adjustable discharge volume according to claim 1, characterized in that: The air holes (501) are evenly distributed on the outer side of one end of the plunger (406), the moving block (502) is slidably connected to the outer side of the air holes (501), and the moving plate (503) is arranged in an "L" shape.

7. The metering pump with adjustable discharge volume according to claim 5, characterized in that: The teeth (504) are evenly spaced at the top of the moving plate (503), and the gear (506) and the moving plate (503) are meshed together by the teeth (504).

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