CN2466390Y

CN2466390Y - Industrial process flow intelligent pump

Info

Publication number: CN2466390Y
Application number: CN01211714U
Authority: CN
Inventors: 李冬贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-19
Filing date: 2001-02-19
Publication date: 2001-12-19
Anticipated expiration: 2011-02-19
Also published as: WO2002066835A1

Abstract

The utility model provides an industrial process intelligent pump. A pump body 1 is connected with a prime mover 3 through a coupling 2, and a pipeline 4 which is connected with the pump body 1 is connected with an electric adjusting valve 5. Pressure sensors 6, 7 are respectively arranged on an inlet and an outlet of the pump body 1, and output signals of the pressure sensors 6, 7 are connected with a digital monitoring circuit 8. The utility model has the advantages that the monitoring to various indexed can be completed without the need of using a flow sensor with high manufacturing cost, which leads the cost of the integral pump and a monitoring device to be reduced.

Description

The industrial flow intelligent pump

The utility model relates to a kind of pump, the especially a kind of industrial flow intelligent pump that can monitor flow and lift.

At present, all need parameters such as its flow, lift, power are monitored for applied pump in the industrial production, the also requirement that has is controlled automatically to pump.Existing monitoring, autocontrol method are that the pump housing is joined by shaft joint and prime mover, be connected with electric control valve on the pipeline that joins with the pump housing, be connected to control circuit with prime mover, electric control valve, the input signal of control circuit must be supplied with by the pressure transducer, power sensor and the flow transducer that are arranged in the equipment, indispensable, the setting of the above sensor not only makes entire equipment that the maintenance trouble is installed, because the cost of flow transducer is very high, make the corresponding raising of cost of complete equipment simultaneously.

The purpose of this invention is to provide a kind of need not the use traffic sensor, cost is low and precision is high industrial flow intelligent pump.

Technical solution of the present invention is a kind of industrial flow intelligent pump, the pump housing 1 joins by shaft joint 2 and prime mover 3, on the pipeline 4 that joins with the pump housing 1, be connected to electric control valve 5, inlet, outlet at the pump housing 1 are respectively arranged with

pressure transducer

6,7, and the output signal of

pressure transducer

6,7 connects digital supervision circuit 8.

Described digital supervision circuit 8 is the microcomputer monitoring circuit.

It is to use the flow transducer that involves great expense that the utility model is compared biggest advantage with prior art, can finish the monitoring of various parameters, entire pump and watch-dog cost are decreased, the utility model also can intuitively and accurately show, control flow, the lift in the industrial flow simultaneously, the production that guarantees industrial flow and products thereof reaches the desired design index, thereby guarantees the quality of industrial products such as chemical industry, oil, chemical fertilizer, medicine.

Fig. 1 is the utility model embodiment's a structural representation

Below in conjunction with accompanying drawing and specific embodiment of the utility model the utility model is further described.As shown in Figure 1, the pump housing 1 joins by shaft joint 2 and prime mover 3, on the pipeline 4 that joins with the pump housing 1, be connected to electric control valve 5, inlet, outlet at the pump housing 1 are respectively arranged with

pressure transducer

6,7, the output signal of

pressure transducer

6,7 connects digital supervision circuit 8, and described digital supervision circuit 8 is the microcomputer monitoring circuit.

The programming of microcomputer monitoring circuit will be set up mathematical model with the water conservancy performance parameter that the pump series products is accurately tested before dispatching from the factory, concrete mathematical model is as follows:

The relation curve of lift (H) and flow (Q): range of flow O-R ₁In, its lift H=A ₁+ K ₁Q; Range of flow R ₁-R ₂In, its lift H=A ₂+ K ₂Q; Range of flow R _N-1-R _nIn, its lift H=A _n+ K _nQ, wherein A, K are constants;

The relation curve of net positive suction head (NPSH) and flow (Q): range of flow O-R ₁In, its NPSH=B ₁+ T ₁Q; Range of flow R ₁-R ₂In, NPSH=B ₂+ T ₂Q; Range of flow R _N-1-R _nIn, NPSH=B _n+ T _nQ, wherein B, T are constants;

Power of motor examination value (N _Water) with the relation curve of flow (Q): range of flow O-R ₁In, its N _Water=C ₁+ U ₁Q; Range of flow R ₁-R ₂In, N _Water=C ₂+ U ₂Q; Range of flow R _N-1-R _nIn, N _Water=C _n+ U _nQ, wherein C, U are constants; Fluid density under the working state is ρ, then the actual power N under the working state _ρ=ρ * N _Water

Working principle: at first, flow and head curve, flow and net positive suction head curve, flow and the power of motor curve of being tested before the factory pumped in the single-chip microcomputer memory, when the pressure signal that will enter the mouth and export when the pressure transducer of the entrance and exit of pump imports single-chip microcomputer into, lift of pump H=(P _{Go out}-P _{Go into})/ρ, the mechanical property parameters such as consumption of the flow of pump, net positive suction head, motor actual power all can and show by the calculated with mathematical model in the program simultaneously, can need according to chemical-process, flow by the electric control valve regulating system is to predetermined value, and shows response lift, net positive suction head and the power of motor of this operation point simultaneously.

Claims

1. industrial flow intelligent pump, it is characterized in that: the pump housing (1) joins by shaft joint (2) and prime mover (3), on the pipeline (4) that joins with the pump housing (1), be connected to electric control valve (5), inlet, outlet in the pump housing (1) are respectively arranged with pressure transducer (6), (7), and the output signal of pressure transducer (6), (7) connects digital supervision circuit (8).

2. industrial flow intelligent pump according to claim 1 is characterized in that: described digital supervision circuit (8) is the microcomputer monitoring circuit.