Constant-speed and constant-pressure pump device

Abstract

The invention relates to the technical field of experimental facilities and particularly relates to a constant-speed and constant-pressure pump device. The constant-speed and constant-pressure pump device comprises a double-pump body and a servo driving mechanism used for driving the double-pump body to act, and further comprises a PLC host connected with the double-pump body, a pressure sensor and a position sensor, and the PLC host is connected with a touch display screen. The double-pump body comprises a base, a case installed on the base, a first pump body and a second pump body, wherein the first pump body and the second pump body are arranged in the case in a left-right parallel mode and are of the same structure. According to the constant-speed and constant-pressure pump device, thedouble-pump structure is adopted, cooperation changing can be achieved, and continuous liquid supply is ensured; the mode of combining a PLC and the touch display screen is adopted, operation is easy, and the action of the pump can be observed directly; ceramic plungers are adopted and have the advantages of being super corrosion resistance, abrasion resistance and the like; meanwhile, the constant-speed and constant-pressure pump device can automatically detect pressure and flow signals in barrels and has the pressure protection function; and besides, the constant-speed and constant-pressurepump device is high in precision, small in size, stable, reliable, high in automation degree and convenient to carry.

Description

technical field [0001] The invention relates to the technical field of experimental devices, in particular to a constant-speed and constant-pressure pump device. Background technique [0002] At present, the development history of metering pumps is not very long, and China's domestic market is shorter, so the technical level of metering pumps in my country is not high, and the display devices of metering pumps are mostly unintuitive, with low metering accuracy and large errors, making it difficult to ensure accuracy measurement results. Metering pumps are widely used in all walks of life. At present, traditional metering pumps can no longer meet people's higher requirements for high precision and stability. However, most domestic petrochemical fields generally use foreign equipment, and the price is generally relatively expensive. , and later maintenance is also troublesome; in the past, many metering pumps generally used the handwheel to adjust the stroke of the screw to de...

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Problems solved by technology

[0002] At present, the development history of metering pumps is not very long, and China's domestic market is shorter, so the technical level of metering pumps in my country is not high, and the display devices of metering pumps are mostly unintuitive, with low metering accuracy and large errors, making it difficult to ensure accuracy The measurement results of

Metering pumps are widely used in all walks of life. At present, traditional metering pumps can no longer meet people's higher requirements for high precision and stability. However, most domestic petrochemical fields generally use foreign equipment, and the price is generally relatively expensive. , and later maintenance is also troublesome; in the past, many metering pumps generally used the handwheel to adjust the stroke of the screw to determine the flow rate discharged by the pump per unit time. Combination of modern control technologies such as technology and communication technology

An important feature of the metering pump is the requirement of high precision, but the disadvantage of many metering pumps in the domestic market is that the accuracy is low, the general precision is 0.02ml / min; the choice of material is one of the important factors, and the metering pump directly with the liquid The materials of the contact parts have higher requirements, and the materials used must ensure better corrosion resistance, wear resistance and higher hardness; domestic metering pumps are generally relatively large in size, and it is not very convenient to carry; The manufacturing industry pays more attention to the details of these aspects, so the technical level will gradually meet the international standards

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