CN203366147U

CN203366147U - Constant pressure water supply oil supply device

Info

Publication number: CN203366147U
Application number: CN 201320498937
Authority: CN
Inventors: 高达飞; 姜亚凤; 肖京; 吴存建
Original assignee: DONGYING CHENGDA ELECTRIC CONTROL EQUIPMENT Co Ltd
Current assignee: DONGYING CHENGDA ELECTRIC CONTROL EQUIPMENT Co Ltd
Priority date: 2013-08-16
Filing date: 2013-08-16
Publication date: 2013-12-25
Anticipated expiration: 2023-08-16

Abstract

The utility model relates to a constant pipeline pressure device, and especially relates to a constant pressure water supply oil supply device. The constant pressure water supply oil supply device comprises a main loop and a DC measurement loop. The main loop comprises a primary loop and an AC control loop. The primary loop is mainly formed by connecting a breaker QF with a frequency converter VFD, a thermorelay KH1, a thermorelay KH2, a current transformer TA, a motor M1 and a motor M2. The DC measurement loop is mainly composed of a DC power source, a pressure sensor I/P and a PID controller, wherein the DC power source is connected with the PID controller and the pressure sensor I/P; and the PID controller is connected with the frequency converter wiring terminal. The beneficial effects are that: the frequency converter is utilized to adjust dynamic pipeline pressure, and the constant pressure water supply oil supply device is capable of performing corresponding setting, overpressure alarming and pump stopping functions; the constant pressure water supply oil supply device is mainly to prevent life inconvenience due to the water pressure reducing and economic benefit loss in pipeline pressure transmission, and is to improve the reliability in water supplying and oil supplying.

Description

The constant pressure water supply fueller

Technical field

The utility model relates to a kind of constant line pressure device, particularly a kind of constant pressure water supply fueller.

Background technology

There will be the phenomenons such as hydraulic pressure reduction during at water use peak at the living water of many residential quarters; There will be water hammer or phenomenon fluctuated by common control mode, and regulate pressure by the aperture of valve in oil recovery fuel feeding course of conveying, extremely unreliable pressure is also unstable, and to the very high maintenance cost of bringing equally other of intensity of pump shaft.

Summary of the invention

The purpose of this utility model is exactly in view of the foregoing defects the prior art has, and a kind of constant pressure water supply fueller is provided, and prevents that hydraulic pressure from reducing the life inconvenience brought.

Its technical scheme is: comprise major loop, direct current measurement loop, wherein, major loop comprises primary circuit and ac control circuit; Primary circuit is mainly connected to form by circuit breaker Q F and frequency converter VFD, electrothermal relay KH1, electrothermal relay KH2, current transformer TA, motor M 1, motor M 2, three-phase alternating current connects frequency converter VFD and motor M 1, motor M 2 by circuit breaker Q F, be provided with A.C. contactor KM1 between frequency converter VFD and motor M 1, be provided with A.C. contactor KM3 between frequency converter VFD and motor M 2, serial connection electrothermal relay KH1 on described motor M 1, serial connection electrothermal relay KH2 on motor M 2, frequency converter VFD connects current transformer TA; In ac control circuit, by current transformer TA, electrothermal relay KH1, electrothermal relay KH2 and reometer A, connected to form;

The direct current measurement loop mainly is comprised of direct supply DC, pressure transducer I/P, PID controller, and direct supply connects PID controller and pressure transducer I/P, and the PID controller connects transducer terminal.

Above-mentioned transducer terminal sub-connection alarm lamp.

Be provided with A.C. contactor KM2 between above-mentioned motor M 1 and circuit breaker Q F, between described motor M 2 and circuit breaker Q F, be provided with A.C. contactor KM4.

The beneficial effects of the utility model are: this design is a kind ofly with frequency converter, to regulate dynamic line pressure, and can make corresponding setting and overpressure alarm and termination of pumping functional device, Main Function is to prevent that hydraulic pressure from reducing the life inconvenience and the line pressure that bring and carrying the economic benefit of bringing, and improves the reliability of water supply, fuel feeding.

The accompanying drawing explanation

Accompanying drawing 1 is the wiring diagram of major loop;

Accompanying drawing 2 is the wiring diagrams in direct current measurement loop;

In upper figure: circuit breaker Q F, frequency converter VFD, A.C. contactor KM, electrothermal relay KH, current transformer TA, motor M, reometer A, direct supply DC, pressure transducer I/P, PID controller, alarm lamp 1.

Embodiment

1-2 by reference to the accompanying drawings, the utility model will be further described:

The utility model comprises major loop, direct current measurement loop, and wherein, major loop comprises primary circuit and ac control circuit; Primary circuit is mainly connected to form by circuit breaker Q F and frequency converter VFD, electrothermal relay KH1, electrothermal relay KH2, current transformer TA, motor M 1, motor M 2, three-phase alternating current connects frequency converter VFD and motor M 1, motor M 2 by circuit breaker Q F, be provided with A.C. contactor KM1 between frequency converter VFD and motor M 1, be provided with A.C. contactor KM3 between frequency converter VFD and motor M 2, serial connection electrothermal relay KH1 on described motor M 1, serial connection electrothermal relay KH2 on motor M 2, frequency converter VFD connects current transformer TA; In ac control circuit, by current transformer TA, electrothermal relay KH1, electrothermal relay KH2 and reometer A, connected to form;

Above-mentioned transducer terminal sub-connection alarm lamp 1.

In the course of work: the 4-20mA that the PID controller will be come by pressure transducer I/P feedback is measured and computing, and operation result is made to instruction with analog signals to frequency converter VFD again, pressure is controlled to the scope of wanting.

Claims

1. a constant pressure water supply fueller, it is characterized in that: comprise major loop, direct current measurement loop, wherein, major loop comprises primary circuit and ac control circuit; Primary circuit is mainly connected to form by circuit breaker Q F and frequency converter VFD, electrothermal relay KH1, electrothermal relay KH2, current transformer TA, motor M 1, motor M 2, three-phase alternating current connects frequency converter VFD and motor M 1, motor M 2 by circuit breaker Q F, be provided with A.C. contactor KM1 between frequency converter VFD and motor M 1, be provided with A.C. contactor KM3 between frequency converter VFD and motor M 2, serial connection electrothermal relay KH1 on described motor M 1, serial connection electrothermal relay KH2 on motor M 2, frequency converter VFD connects current transformer TA; In ac control circuit, by current transformer TA, electrothermal relay KH1, electrothermal relay KH2 and reometer A, connected to form;

2. constant pressure water supply fueller according to claim 1, is characterized in that: described transducer terminal sub-connection alarm lamp (1).

3. constant pressure water supply fueller according to claim 1, is characterized in that: be provided with A.C. contactor KM2 between described motor M 1 and circuit breaker Q F, between described motor M 2 and circuit breaker Q F, be provided with A.C. contactor KM4.