Nanoliter metering pump
A quantitative pump, front and rear direction technology, applied in the field of metering pumps, can solve the problems of high fluid shear force, high viscosity, unsuitable for continuous control, etc.
Pending Publication Date: 2020-03-31
庄远向
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Problems solved by technology
In the paint spraying and glue spraying industries, paint and glue are characterized by high viscosity and sensitivity to shear force, and it is difficult to achieve precise control when conveying with small flow
When the existing gear pump and vane pump are used to transport paint or glue, due to the influence of high viscosity of paint or glue, it is impossible to achieve accurate control of small flow rate, low precision, and limited by the mechanical seal structure, it is not suitable for high-pressure working conditions; gear pump The gear meshes to seal and deliver the flow, which has a large shear force on the fluid, and is not suitable for fluids sensitive to shear force such as paint and glue.
Existing plunger pump products have a single-direction extrusion structure. When working, the fluid is first sucked into the cylinder for storage, and then the fluid in the cylinder is pushed out. Repeatedly, it is necessary to wait for the time to suck back the fluid, which can only be realized intermittently. The function of conveying fluid is only suitable for intermittent control, not for continuous control
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[0027] Below in conjunction with accompanying drawing, the present invention will be further described, see Figure 1-6 As shown, the nanoliter quantitative pump of the present invention includes a base body 1, a cylinder body 2 arranged on the base body 1 along the front-rear direction, a plunger rod 3 slidingly arranged in the cylinder body 2 along the front-rear direction, and a cylinder body 2 inside the cylinder body 2. The plunger 4 that is slidingly fitted in the cavity, the driving device 5 that drives the plunger rod 3 to reciprocate and linearly move along the front and rear directions, the feed pipe 6, and the discharge pipe 7, the plunger 4 is fixed on the plunger rod 3, and the plunger 4 drives the cylinder The inner chamber of the body 2 is divided to form a front chamber and a rear chamber. The front end of the cylinder block 2 is provided with a front feed port 21 and a front discharge port 22, and the front feed port 21 and the front discharge port 22 are comm...
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The invention relates to the technical field of metering pumps, and in particular to a nanoliter metering pump. The nanoliter metering pump comprises a seat body, a cylinder block, a plunger rod, a plunger, a driving device, a feeding tube and a discharging tube, the plunger is fixed on the plunger rod, the front end of the cylinder block is provided with a front feed port and a front discharge port, the rear end of the cylinder block is provided with a rear feed port and a rear discharge port, the front feed port is provided with a front feed switch valve, the front discharge port is providedwith a front discharge switch valve, the rear feed port is provided with a rear feed switch valve, the rear discharge port is provided with a rear discharge switch valve, an outlet of the feeding tube is in communication with the front feed switch valve and the rear feed switch valve, and an inlet of the discharging tube is in communication with the front discharge switch valve and the rear discharge switch valve. The nanoliter metering pump has the following advantages that continuous output of fluid can be achieved, the action of shearing force on the fluid is avoided, the flow rate and output of the fluid can be controlled with high precision, and the nanoliter metering pump can be quickly cleaned.
Description
Technical field: [0001] The invention relates to the technical field of metering pumps, in particular to nanoliter quantitative pumps. Background technique: [0002] At present, gear pumps, vane pumps or plunger pumps are mainly used as power devices for liquid delivery. In the paint spraying and glue spraying industries, paint and glue have the characteristics of high viscosity and sensitivity to shear force, and it is difficult to achieve precise control when conveying with small flow. When the existing gear pump and vane pump are used to transport paint or glue, due to the influence of high viscosity of paint or glue, it is impossible to achieve accurate control of small flow rate, low precision, and limited by the mechanical seal structure, it is not suitable for high-pressure working conditions; gear pump Sealing and conveying flow are carried out by gear meshing, which has a large shear force on the fluid, and is not suitable for fluids sensitive to shear force such a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F04B13/00F04B15/00F04B15/02F04B17/03F04B5/02F04B53/10F04B49/06F04B49/20
CPCF04B13/00F04B15/00F04B15/02F04B17/03F04B5/02F04B53/10F04B49/06F04B49/20
Inventor 庄远向
Owner 庄远向