CN105697349A

CN105697349A - Air compressor electric control circuit for salt bag packing machine

Info

Publication number: CN105697349A
Application number: CN201610046992.0A
Authority: CN
Inventors: 秦传卓; 伍柒华; 石昌来; 孔祥富; 伍海林; 瞿林松; 朱本宏
Original assignee: CHINASALT ANHUI RUNHUA SALT INDUSTRY DEVELOPMENT Co Ltd
Current assignee: Zhongyan Anhui Runhua Qiangwang Salt Industry Co., Ltd.
Priority date: 2016-01-25
Filing date: 2016-01-25
Publication date: 2016-06-22
Anticipated expiration: 2036-01-25
Also published as: CN105697349B

Abstract

The invention relates to an air compressor electric control circuit for a salt bag packing machine. The air compressor electric control circuit for the salt bag packing machine comprises a plurality of air compressor circuit bodies which are sequentially connected with power leads. Each air compressor circuit body comprises an air switch QF connected with a power source and an alternating current contactor KM connected between the air switch QF and a motor M, and a safety resistor RF is connected between the alternating current contactor KM and the motor M. A time relay KT is arranged in each air compressor circuit body. A pressure switch K is arranged on each air compressor circuit body. The pressure switch K of the front air compressor circuit body is sequentially connected with the time relay KT of the back air compressor circuit body. The effect that an air compressor operates efficiently and orderly is ensured through the time relays KT and the pressure switches K which are arranged additionally.

Description

The electric control circuit of salt bag package machine air compressor machine

Technical field

The invention belongs to salt bag pack assembling production lines field, relate to the air compressor machine for salt bag package machine pneumatic element supply, be specifically related to the electric control circuit of a kind of salt bag package machine air compressor machine。

Background technology

Air compressor machine is also air compressor, salt bag pack assembling production lines air compressor machine is mainly piston type air compressor, its operation principle is to shorten own air pressure into compression air by the change of volume, compression air is delivered to salt bag pack assembling production lines pneumatic element again, the cylinder activation unit of such as salt bag automatic packaging unit, and then to complete the packing work of automatic packaging machine。

Salt bag pack assembling production lines need multiple air compressors to supply; four generally it are sequentially arranged; the pressure switch property of there are differences due to air compressor machine; after making air compressor machine be again turned on; often occur that First air compressor machine runs all the time; second compressor operation time is longer, and other two lie substantially in stopped status。So in the reservoir pressure least significant end of air compressor machine, when namely second air compressor machine just starts, the unable operation of automatic packaging machine cylinder, so may result in the operation with motionless similar these executive components of cutting mechanism of the packer cylinder, cause that band cutting salt bag cutting cannot complete, and then cause that waste material phenomenon occurs。Additionally, First air compressor machine runs all the time, running the time longer, temperature is higher, carbon distribution easily occurs, and carbon distribution seriously will occur pull-cylinder phenomena further, thus needs often to change handpiece of air compressor。

The shortcoming that under summary, the electric control circuit of existing salt bag package machine air compressor machine exists is exactly: 1, be initially powered, and several air compressor machines (being generally four) are run after starting simultaneously, and instant starting currents is big, and main line impact is big, and voltage pulsation is big；2, one to two air compressor machine only having preamble runs after starting, and two air compressor machines of postorder are substantially at stopped status, and the handpiece of air compressor temperature that preamble works always is too high; carbon distribution is serious; easy-to-draw cylinder head, one to two handpiece of air compressor of preamble often damages, it is necessary to often change；3, the air accumulator of air compressor machine periodically occurs that air pressure is on the low side, affects salt bag automatic packaging unit Pneumatic component properly functioning；4, each compressor operation is controlled by respective pressure switch, controls inharmonious。

Summary of the invention

It is an object of the present invention to provide the electric control circuit of a kind of salt bag package machine air compressor machine, solve existing drawback, it is ensured that the work of each air compressor machine effective。

In order to realize object above, the technical solution used in the present invention is: a kind of electrical control circuit of air compressor, including several the air compressor machine circuit being connected with power lead-ining line successively, every air compressor machine circuit includes the air switch QF being connected with power supply, it is connected to the A.C. contactor KM between air switch QF and motor M, insurance resistance RF it is connected between A.C. contactor KM and motor M, between every air compressor machine circuit, time relay KT is set, every air compressor machine circuit arranges pressure switch K, the time relay KT of the pressure switch K of preamble air compressor machine circuit and postorder air compressor machine circuit is sequentially connected。

The method have technical effect that: 1, be initially powered, run after starting by platform after several air compressor machine time delay several seconds successively, time is set by the time relay, so, instant starting currents is little, and main line impact is little, and voltage pulsation is little, and be again started up, air compressor machine runs after still starting by platform after the time delay several seconds successively；2, one to two handpiece of air compressor temperature of preamble reduces, and carbon distribution is few, head life；3, the air accumulator of air compressor machine pressure all the time is sufficient, salt bag automatic packaging unit Pneumatic component normal operation；4, outside every compressor operation is controlled by respective pressure switch, postorder air compressor machine is controlled by preamble pressure switch of air compressor simultaneously, preamble increase successively to the pressure of postorder pressure switch of air compressor。

Accompanying drawing explanation

Fig. 1 is the electric control circuit figure of the present invention；

Fig. 2 is the structure diagram of the time relay in the present invention。

Detailed description of the invention

Here explaining the concept of lower preamble air compressor machine, postorder air compressor machine, several the air compressor machines being sequentially arranged are sequential starts, during several air compressor machine normal operation, first start and are defined as preamble air compressor machine, and rear startup is defined as postorder air compressor machine。With reference to Fig. 1, air compressor machine is exactly the startup successively of dextrosinistral M1, M2, M3, M4。

A kind of electrical control circuit of air compressor, including several the air compressor machine circuit being connected with power lead-ining line successively, every air compressor machine circuit includes the air switch QF being connected with power supply, it is connected to the A.C. contactor KM between air switch QF and motor M, insurance resistance RF it is connected between A.C. contactor KM and motor M, between every air compressor machine circuit, time relay KT is set, every air compressor machine circuit arranges the time relay KT of pressure switch K, the pressure switch K of preamble air compressor machine circuit and postorder air compressor machine circuit and is sequentially connected。

With reference to accompanying drawing, every air compressor machine road connects with on three-phase alternating current, and air switch QF1, QF2, QF3, QF4 can also play the effect of the automatic tripping power-off of overload protection while playing the effect connecting and closing section in the line；A.C. contactor KM1, KM2, KM3, KM4 auxiliary contact performs control instruction；Insurance resistance RF1, RF2, RF3, RF4 have the effect of resistor and fuse concurrently, and when temperature exceedes certain altitude (such as 500 degree), resistive layer rapid deterioration fuses, and circuitry cuts, play the effect of protection circuit；Time delay a period of time contact output after the time relay KT1, KT2, KT3, KT4 energising added, (time is by time relay KT sets itself) is run after starting by platform after being so initially powered several the air compressor machines time delay several seconds successively, instant starting currents is little, main line impact is little, voltage pulsation is little, when being again started up, air compressor machine runs after still starting by platform after the time delay several seconds successively；The effect of pressure switch K is, outside every compressor operation is controlled by respective pressure switch K, postorder air compressor machine is controlled by preamble pressure switch of air compressor K simultaneously, increased successively to the pressure of postorder pressure switch of air compressor K by preamble, it is preferred that pressure increases 0.01MP successively, in conjunction with Fig. 1, K1 relatively K2 pressure increases 0.01MP, K2 relatively K3 and increases 0.01MP, by that analogy。So each air compressor machine works successively in order, and preamble handpiece of air compressor compares that existing temperature reduces, carbon distribution is few, head life；The air accumulator of air compressor machine pressure all the time is sufficient, packer Pneumatic component normal operation。

Preferably, every air compressor machine air switch QF1, QF2, QF3, QF4 are provided with overcurrent relay coil。This is equivalent to add overcurrent relay, and when overload and short trouble occurs in electricity system, this relay by predetermined time limit action message or send signal, can excise faulty component, it is ensured that the safety of electricity system。

With reference to Fig. 1, further, this circuit includes four the air compressor machine circuit being connected successively with power lead-ining line, and the time relay KT arranging three time relay KT, the pressure switch K of preamble air compressor machine circuit and postorder air compressor machine circuit between four air compressor machine circuit is sequentially connected。K1-K4 is referred to as air engine pressure switch K, it is preferred that when K is adjusted to 0.45-0.8MP, and when air pressure reaches 0.8MP, K disconnects, and air compressor machine quits work。When air pressure near≤0.45MP time, K close, compressor operation, as pressure 0.45MP, air compressor machine does not start。

In conjunction with Fig. 1,2, time relay KT equivalent circuit theory illustrates: 220V power supply inputs through 2,7 feet, DC source is obtained after all wave rectification voltage stabilizing, the delay circuit of the RC composition within the supply of this power supply, R is adjustable potentiometer, regulating the big I of R and change delay time length, JK is relay normally open contact, and relay coil one end is connected on the positive pole of power supply, the other end is connected on the delay circuit by RC composition and is controlled。When relay coil obtains after electric JK closes, 8,6 conductings, compressor operation, when N disconnects, 8,6 disconnect, and air compressor machine is out of service。N is controlled by pressure switch of air compressor K。

It is further preferred that described time relay KT is the air damp type time relay。Electronical time relay is subject to voltage and stirs the impact with variation of ambient temperature, and anti-interference is poor, is not suitable for the workshop condition of salt bag pack assembling production lines；Motor time relay structure is complicated, is not suitable for frequent operation, and delay time error is affected bigger by supply frequency。Due to air damp type time relay reference time delay relatively big (0.4 ~ 180s), and can not made energising and two kinds of delayed version simple in construction of power-off by the impact of voltage and frequency fluctuation, the life-span is long, it is advantageous to this time relay。

Claims

1. the electric control circuit of a salt bag package machine air compressor machine, including several the air compressor machine circuit being connected with power lead-ining line successively, every air compressor machine circuit includes the air switch QF being connected with power supply, it is connected to the A.C. contactor KM between air switch QF and motor M, insurance resistance RF it is connected between A.C. contactor KM and motor M, it is characterized in that: between every air compressor machine circuit, time relay KT is set, every air compressor machine circuit arranges the time relay KT of pressure switch K, the pressure switch K of preamble air compressor machine circuit and postorder air compressor machine circuit and is sequentially connected。

2. the electric control circuit of salt bag package machine air compressor machine according to claim 1, it is characterized in that: this circuit includes four the air compressor machine circuit being connected successively with power lead-ining line, the time relay KT arranging three time relay KT, the pressure switch K of preamble air compressor machine circuit and postorder air compressor machine circuit between four air compressor machine circuit is sequentially connected。

3. the electric control circuit of salt bag package machine air compressor machine according to claim 2, it is characterised in that: every air compressor machine air switch QF1, QF2, QF3, QF4 are provided with overcurrent relay coil。

4. the electric control circuit of salt bag package machine air compressor machine according to claim 1, it is characterised in that: described time relay KT is the air damp type time relay。