一种隔膜计量泵
By combining the eccentric transmission mechanism with the high-pressure protection mechanism, the problems of back-out delay and overpressure protection in the transportation of high-viscosity fluids are solved, realizing stable delivery and safe protection of the diaphragm metering pump, simplifying the equipment structure and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG DASHAN PUMP IND GRP CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing metering pumps are prone to back-off delays when delivering high-viscosity fluids, and overpressure protection relies on additional structures, increasing equipment complexity and cost.
The design combines an eccentric transmission mechanism with a high-pressure protection mechanism. It provides stable driving force through rigid transmission and uses an overpressure spring to achieve automatic protection in case of overpressure, avoiding the attenuation of reset force and the complexity of the equipment.
It ensures stable delivery and safe protection of high-viscosity fluids, overcomes viscous resistance, achieves precise diaphragm repositioning, simplifies equipment structure, and reduces manufacturing costs.
Smart Images
Figure CN224515349U_ABST
Abstract
Claims
1. A diaphragm metering pump comprising a housing (1) in which a diaphragm (2), a fluid containing chamber (3), and an inlet non-return valve (4) and an outlet non-return valve (5) communicating with the fluid containing chamber (3) are arranged, characterized in that: The shell (1) is provided with a high-pressure protection mechanism (6) connected with the diaphragm (2), and an eccentric transmission mechanism (7) assembled with the high-pressure protection mechanism (6), when the fluid cannot be discharged from the outlet check valve (5), the eccentric transmission mechanism (7) cannot drive the diaphragm (2) to pump the fluid in the fluid containing cavity (3).
2. A diaphragm metering pump according to claim 1, characterized in that: The eccentric transmission mechanism (7) comprises a rotating disc (701) connected with an external driving device, a transmission rod (702) is arranged on the rotating disc (701) and eccentrically rotates with a bearing through a rotating rod, and a pump shaft (703) is arranged on the transmission rod (702) and rotates through a rotating rod.
3. A diaphragm metering pump according to claim 2, characterized in that: The high-pressure protection mechanism (6) comprises a hollow sliding block (601) slidingly arranged, one side of the hollow sliding block (601) is assembled and connected with the diaphragm (2), one end of the pump shaft (703) extends into the hollow sliding block (601), and the end is provided with a sliding disc (704) slidingly matched with the inner wall of the hollow sliding block (601), and an overpressure spring (602) is arranged between the inner wall of the hollow sliding block (601) and the sliding disc (704), when the fluid cannot be discharged from the outlet check valve (5), the overpressure spring (602) is compressed by the sliding disc (704), and the eccentric transmission mechanism (7) idles.
4. A diaphragm metering pump according to claim 3, characterized in that: The pre-tightening force of the overpressure spring (602) is greater than the maximum driving force of the eccentric transmission mechanism (7) applied to the diaphragm (2) when conveying a high-viscosity fluid in a preset viscosity range, and is less than the maximum safe pressure that can be borne by the external pipeline of the outlet check valve (5).
5. A diaphragm metering pump in accordance with claim 1 characterised in that: The shell (1) comprises a transmission shell (101), a connecting shell (102) and a flow passage shell (103), the eccentric transmission mechanism (7) is assembled in the transmission shell (101), the high-pressure protection mechanism (6) is assembled in the connecting shell (102), the fluid containing cavity (3), the inlet check valve (4) and the outlet check valve (5) are arranged on the flow passage shell (103), and the flow passage shell (103) and the connecting shell (102) are provided with clamping grooves on opposite surfaces for assembling the diaphragm (2).
6. A diaphragm metering pump in accordance with claim 1 characterised in that: The diaphragm (2) is provided with an arc-shaped boss (8) on the side facing the fluid containing cavity (3), and the fluid containing cavity (3) is provided with a concave boss (9) matched with the arc-shaped boss (8).