CN2361032Y

CN2361032Y - Water flow electric relay

Info

Publication number: CN2361032Y
Application number: CN 98234122
Authority: CN
Inventors: 张良奇; 徐南下
Original assignee: HUANGQI LIANGQI STEEL CYLINDER GEN FACTORY NANHAI CITY
Current assignee: HUANGQI LIANGQI STEEL CYLINDER GEN FACTORY NANHAI CITY
Priority date: 1998-04-28
Filing date: 1998-04-28
Publication date: 2000-01-26
Anticipated expiration: 2008-04-28

Abstract

The utility model relates to a water flow electric relay, comprising a traditional relay switch part and an improved signal sample part. The utility model takes water flow as a signal source, with a blade wheel and a blade wheel plate on a water flow valve and a photoelectric converter, the utility model can convert water flow quantity into electrical signals, and the signals can be input by a signal processing circuit so as to control the on-off of the relay. Therefore, the utility model can efficiently assure that a power device can work under a sufficient cooling condition, and the utility model has the advantages of reliable work, easy adjustment, low cost, etc.

Description

Water flow relay

The utility model relates to the device to the break-make control of power device, particularly a kind of relay that utilizes current to control.

Often adopt water cooling in the power device work of power electronic equipment.In order to guarantee the reliable cooling of water to power device, setting pressure relay in cooling water pipeline usually promptly in time is switched on or switched off operating circuit by pressure switch according to the variation of hydraulic pressure, reaches the purpose of protection power device.But; the major defect of this technology is the poor reliability of final protection; because the influence of foreign material in the induration of water quality and the current; very easily cause water pipe to stop up; cooling water can not in time arrive the cooling position; but the hydraulic pressure in the pipeline still exists, and pressure switch can not in time disconnect operating circuit, causes the power device temperature rise too high and damage.Although can take cooling water is filtered and softening processings waits measure, one side has increased equipment input and expense like this, and the processing of water quality is limited eventually on the other hand, pipeline blockage and the possibility of power device damage is still existed.

The purpose of this utility model designs the water flow relay that a kind of variation according to cooling water flow realizes break-make control for overcoming the deficiencies in the prior art part, makes power device can access reliable protection.

The technical solution of the utility model is such: water flow relay, include the traditional relay switch part and the sample of signal part of power device being carried out break-make, special feature is that the sample of signal part is made of the water flow valve and the signal processing circuit that are connected in the cooling water pipeline, impeller is housed in the water flow valve, valve body outer with the coaxial blade that is equipped with of impeller, between about the blade photoelectric conversion device is set, the signal that photoelectric conversion device produces is through signal processing circuit input relay switch sections.Signal processing circuit is linked in sequence by oscillator, filter, comparator and forms further, the signal input oscillator that photoelectric conversion device produces, and the output of comparator drives the relay switch part.

Below in conjunction with drawings and Examples the utility model is elaborated.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the P-P cutaway view of Fig. 1;

Fig. 3 is the Q-Q cutaway view of Fig. 1;

Fig. 4 is a circuit block diagram of the present utility model;

Fig. 5 is an electrical schematic diagram of the present utility model.

Referring to Fig. 1, Fig. 2 and Fig. 3, the water flow valve 1 of present embodiment is loaded in the cooling water pipeline of cooling power device, current enter from the A of valve body 2 end, the impeller 3 of flowing through flows out from the B end, current impeller 3 rotation is equipped with a rotating vane 4 and valve body 2 is outer with impeller 3 is coaxial, rotates synchronously with impeller 3, the blade of rotation is furnished with the photoelectric conversion device of being made up of light source D, optoelectronic switch V2 between 4 about, by the work through the signal processing circuit control relay of the signal of photoelectric conversion device generation.When current reach certain value, the switch sections closure of relay, power device work; When not having current or current to be lower than certain value, blade 4 rotating speeds slow down or stall, and the switch sections of relay disconnects, and power device quits work.

Referring to Fig. 4, Fig. 5, the operation principle of signal processing circuit is such: light source D shines on the optoelectronic switch V2 discontinuously by rotating vane 4, optoelectronic switch V2 sees that photoconduction is logical, shading ends, and with resistance R 1, R2, triode V1, capacitor C 1 is formed oscillator, oscillator signal is coupled to by diode V3 by transformer T, resistance R 3, R4, capacitor C 2, the filter that voltage-stabiliser tube V4 forms, thereby draw mean value, mean value voltage and given voltage VR output to by resistance R 6 after relatively through comparator V5, triode V7, the relay switch part that diode V6 and contact K form.Thereby compare the closed or disconnection of decision relay switch part, the operating state of power controlling device according to average voltage and the setting voltage value that discharge changes into.Wherein voltage-stabiliser tube V4 is provided with for preventing the too fast damage comparator of flow velocity V5, regulates the value of VR, can change the relay origination action value of minimum discharge.

In sum, the utility model has obvious advantage:

1, utilize the break-make of streamflow regime control relay, thus guaranteed output device reliably Safe operation;

2, convert discharge to magnitude of voltage, the more easy to control and adjusting of specific pressure relay;

3, change setting voltage value, just can adapt to the needs of different capacity device cooling, applied widely;

4, reliable operation, operating cost are lower.

Claims

1, water flow relay includes the traditional relay switch sections and the sample of signal part of power device being carried out break-make control, it is characterized in that: the sample of signal part is made of the water flow valve and the signal processing circuit that are connected in the cooling water pipeline; Impeller is housed in the water flow valve, valve body outer with the coaxial blade that is equipped with of impeller, blade is provided with photoelectric conversion device between up and down, the signal of photoelectric conversion device generation is through signal processing circuit input relay switch sections.

2, water flow relay according to claim 1 is characterized in that signal processing circuit is linked in sequence by oscillator, filter, comparator to form, the signal input oscillator that photoelectric conversion device produces, and the output of comparator drives the relay switch part.