Multi-mode controlled high-precision mechanical diaphragm metering pump

Abstract

The utility model relates to the technical field of metering pump discloses a kind of multi-mode control high-precision mechanical diaphragm metering pump, including driving end, with the hydraulic end of installation in the output end of driving end;Driving end includes shell, the inside installation of shell has inner shell, the top of shell is equipped with servo motor, the output end of servo motor is equipped with worm assembly.The multi-mode control high-precision mechanical diaphragm metering pump, by the cooperation of worm assembly and crankshaft assembly, two-stage matching transmission is carried out, worm drive itself is a kind of compact and can realize big reduction ratio structure, first-stage reduction can obtain huge torque gain, the torque is further amplified by its lever principle, and finally acts on plunger, and the output torque of motor is effectively increased by double torque-increasing mechanism, and abundant and stable output torque is provided, which helps to ensure that the volume height of each stroke is consistent, thereby greatly improving the measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of metering pump technology, and in particular to a multi-mode control high-precision mechanical diaphragm metering pump. Background Technology

[0002] Metering pumps, as general-purpose devices for the precise delivery and metering of fluids, are widely used in industrial processes such as petrochemicals, water treatment, pharmaceuticals, and food and beverage. Mechanical diaphragm metering pumps, due to their leak-free operation and high safety, have become an important branch of this field. High precision is the core performance requirement for metering pumps, as it directly affects the stability of the production process, the accuracy of the mixing ratios, and the quality of the final product.

[0003] Due to limitations in their structural design or power transmission mechanism, existing mechanical diaphragm metering pumps have relatively low motor output torque. When dealing with fluids with high viscosity that require greater driving force, or when operating under high pressure, the low torque cannot meet the pump's normal operating requirements, resulting in insufficient torque. Insufficient torque directly affects the pump's performance, making it unable to effectively draw fluid from the source into the pump. This results in unstable flow rates, fluctuating between high and low, or even the pump failing to pump fluid at all. This not only severely impacts the continuity and stability of the production process and reduces production efficiency, but may also affect product quality due to inaccurate fluid delivery. Utility Model Content

[0004] In view of the problem that insufficient torque in existing pumps directly affects the pump's extraction efficiency, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a multi-mode control high-precision mechanical diaphragm metering pump, which aims to significantly improve the output torque without increasing the motor power.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-mode control high-precision mechanical diaphragm metering pump, including a drive end and a hydraulic end installed at the output end of the drive end; The drive end includes a housing, an inner housing is installed inside the housing, a servo motor is installed on the top of the housing, a worm gear assembly is installed at the output end of the servo motor, a spring guide assembly is installed on one side inside the inner housing, a plunger is provided at the center of the spring guide assembly, and a crankshaft assembly for driving the plunger to move laterally is provided inside the inner housing, and the worm gear assembly is connected to the crankshaft assembly in a transmission connection. The servo motor drives the crankshaft assembly to rotate via the worm gear assembly, and the crankshaft assembly, in conjunction with the spring guide assembly, drives the plunger to reciprocate, thereby driving the hydraulic end to work.

[0007] As an improved technical solution, a motor controller is installed on the outer wall of the servo motor.

[0008] As an improved technical solution, a flow regulating handwheel assembly is installed on the side of the housing away from the spring guide assembly, and the output end of the flow regulating handwheel assembly is located inside the inner housing.

[0009] As an improved technical solution, an electrical housing is fixed to the bottom of the outer casing, a drive board is installed inside the electrical housing, and an electronic control assembly is installed at the outward-facing opening end of the drive board.

[0010] As an improved technical solution, the hydraulic end includes a pump head with an inlet and an outlet. A cylinder head is installed at one end of the pump head, and a flexible diaphragm is provided inside the cylinder head. A pump head connector is installed inside the pump head and at the end away from the cylinder head. A sealing ring is provided at the end of the pump head connector away from the flexible diaphragm.

[0011] As an improved technical solution, an outlet valve assembly is fixed at the outlet end of the top of the pump head, and an inlet valve assembly is installed at the inlet end of the bottom of the pump head. Both the outlet valve assembly and the inlet valve assembly are equipped with a valve ball check structure inside.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are: This invention utilizes a two-stage transmission system involving the worm gear assembly and the crankshaft assembly. The worm gear drive itself is a compact structure capable of achieving a large reduction ratio. The first-stage reduction provides a significant torque gain, which is then transmitted to the crankshaft assembly and further amplified through its lever principle, ultimately acting on the plunger. This dual torque-enhancing mechanism effectively increases the motor's output torque and provides ample and stable output torque, helping to ensure consistent volume height in each stroke and thus greatly improving measurement accuracy. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the drive end of a multi-mode controlled high-precision mechanical diaphragm metering pump according to this utility model.

[0014] Figure 2 This is a schematic diagram of the hydraulic end of a multi-mode control high-precision mechanical diaphragm metering pump according to this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Drive end; 11. Housing; 12. Inner housing; 13. Spring guide assembly; 14. Crankshaft assembly; 15. Worm gear assembly; 16. Flow regulating handwheel assembly; 17. Motor controller; 18. Servo motor; 2. Hydraulic end; 21. Pump head; 22. Flexible diaphragm; 23. Pump head connector; 24. Sealing ring; 25. Outlet valve assembly; 26. Cylinder head; 27. Inlet valve assembly; 3. Electrical housing; 4. Drive plate; 5. Electronic control assembly. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0017] Reference Figures 1-2 This is the first embodiment of the present invention, which provides a multi-mode control high-precision mechanical diaphragm metering pump. This multi-mode control high-precision mechanical diaphragm metering pump includes a drive end 1 and a hydraulic end 2 installed at the output end of the drive end 1. The drive end 1 includes a housing 11, an inner housing 12 is installed inside the housing 11, a servo motor 18 is installed on the top of the housing 11, a worm gear assembly 15 is installed at the output end of the servo motor 18, and the output end of the worm gear assembly 15 is located inside the inner housing 12. A spring guide assembly 13 is installed on one side inside the inner housing 12, a plunger is provided at the center of the spring guide assembly 13, and a crankshaft assembly 14 for driving the lateral movement of the plunger is provided inside the inner housing 12, and the worm gear assembly 15 is connected to the crankshaft assembly 14 in a transmission connection. The servo motor 18 drives the crankshaft assembly 14 to rotate through the worm gear assembly 15, and through the crankshaft assembly 14 and the spring guide assembly 13, drives the plunger to reciprocate, thus driving the hydraulic end 2 to work.

[0018] The worm gear assembly 15 and the crankshaft assembly 14 work together to achieve a two-stage transmission. The worm gear transmission itself is a compact structure that can achieve a large reduction ratio. The first-stage reduction can obtain a huge torque gain. This torque is then transmitted to the crankshaft assembly, where it is further amplified through its lever principle and finally acts on the plunger. The dual torque-increasing mechanism effectively increases the output torque of the motor and provides a sufficient and stable output torque, which helps to ensure that the volume height is consistent in each stroke, thereby greatly improving the metering accuracy.

[0019] A motor controller 17 is mounted on the outer wall of the servo motor 18.

[0020] A flow regulating handwheel assembly 16 is mounted on the side of the outer casing 11 away from the spring guide assembly 13, and the output end of the flow regulating handwheel assembly 16 is located inside the inner casing 12.

[0021] An electrical housing 3 is fixed to the bottom of the outer casing 11. A drive board 4 is installed inside the electrical housing 3. An electrical control assembly 5 is installed at the outward-facing opening of the drive board 4. The cooperation between the drive board 4, the electrical control assembly 5, and the motor controller 17 enables the control circuit to accept external current, pulse signals, and bus communication, thereby realizing flow control and timed switching functions.

[0022] The hydraulic end 2 includes a pump head 21 with an inlet and an outlet. A cylinder head 26 is installed at one end of the pump head 21. A flexible diaphragm 22 is provided inside the cylinder head 26. The flexible diaphragm 22 is made of EPDM and PTFE composite material and has good elasticity and chemical resistance. A pump head connector 23 is installed inside the pump head 21 and at the end away from the cylinder head 26. A sealing ring 24 is provided at the end of the pump head connector 23 away from the flexible diaphragm 22.

[0023] An outlet valve assembly 25 is fixed at the outlet end of the top of the pump head 21, and an inlet valve assembly 27 is installed at the inlet end of the bottom of the pump head 21. Both the outlet valve assembly 25 and the inlet valve assembly 27 are equipped with a valve ball check structure to prevent liquid backflow and ensure stable pump delivery. The interface ends of both the outlet valve assembly 25 and the inlet valve assembly 27 are standard external thread structures, which facilitates connection with hoses or quick couplings of different specifications.

[0024] The working principle of this utility model is as follows: the servo motor 18 drives the spring guide assembly 13 to rotate, the worm gear assembly 15 cooperates with the crankshaft assembly 14 to reduce the speed at the output end, increase the output torque, and drive the plunger to move horizontally in the direction of the hydraulic end 2. When the high torque output reaches the output peak, the spring guide assembly 13 sends the plunger back to the starting point, thus completing one reciprocating motion. One reciprocating movement of the plunger will synchronously drive the flexible diaphragm 22 on the hydraulic end 2 to reciprocate, pushing the liquid to flow, so that the fluid enters the pump head 21 through the inlet valve assembly 27 and is discharged outward through the outlet valve assembly 25.

[0025] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-mode control high-precision mechanical diaphragm metering pump, characterized in that: Includes a drive end (1) and a hydraulic end (2) installed at the output end of the drive end (1). The drive end (1) includes a housing (11), an inner housing (12) is installed inside the housing (11), a servo motor (18) is installed on the top of the housing (11), a worm gear assembly (15) is installed at the output end of the servo motor (18), a spring guide assembly (13) is installed on one side inside the inner housing (12), a plunger is provided at the center of the spring guide assembly (13), and a crankshaft assembly (14) for driving the plunger to move laterally is provided inside the inner housing (12), and the worm gear assembly (15) is connected to the crankshaft assembly (14) in a transmission connection. The servo motor (18) drives the crankshaft assembly (14) to rotate through the worm gear assembly (15), and drives the plunger to reciprocate through the crankshaft assembly (14) in conjunction with the spring guide assembly (13), thereby driving the hydraulic end (2) to work.

2. The multi-mode control high-precision mechanical diaphragm metering pump according to claim 1, characterized in that: A motor controller (17) is mounted on the outer wall of the servo motor (18).

3. The multi-mode control high-precision mechanical diaphragm metering pump according to claim 2, characterized in that: The flow regulating handwheel assembly (16) is mounted on the side of the outer shell (11) away from the spring guide assembly (13), and the output end of the flow regulating handwheel assembly (16) is located inside the inner shell (12).

4. A multi-mode controlled high-precision mechanical diaphragm metering pump according to claim 3, characterized in that: An electrical housing (3) is fixed to the bottom of the outer casing (11), and a drive board (4) is installed inside the electrical housing (3). An electronic control assembly (5) is installed at the outward-facing opening end of the drive board (4).

5. A multi-mode controlled high-precision mechanical diaphragm metering pump according to claim 4, characterized in that: The hydraulic end (2) includes a pump head (21) with an inlet and an outlet. A cylinder head (26) is installed at one end of the pump head (21). A flexible diaphragm (22) is provided inside the cylinder head (26). A pump head connector (23) is installed inside the pump head (21) and away from the cylinder head (26). A sealing ring (24) is provided at the end of the pump head connector (23) away from the flexible diaphragm (22).

6. A multi-mode controlled high-precision mechanical diaphragm metering pump according to claim 5, characterized in that: An outlet valve assembly (25) is fixed at the outlet end of the top of the pump head (21), and an inlet valve assembly (27) is installed at the inlet end of the bottom of the pump head (21). Both the outlet valve assembly (25) and the inlet valve assembly (27) are equipped with a valve ball check structure inside.

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