CN203627177U

CN203627177U - Compressor operation protective device

Info

Publication number: CN203627177U
Application number: CN201320674100.3U
Authority: CN
Inventors: 王冠; 宋伟; 方辉
Original assignee: SHALONGDA GROUP CO
Current assignee: SHALONGDA GROUP CO
Priority date: 2013-10-29
Filing date: 2013-10-29
Publication date: 2014-06-04
Anticipated expiration: 2023-10-29

Abstract

The utility model relates to a compressor operation protective device which comprises a main circuit which is connected in parallel to the two ends of a protected device. The main circuit is connected in series with a power switch K which is connected with a fuse FU, and a first branch circuit between the fuse FU and the ground is connected in series with a power indicator HL3. The main circuit is connected in series with a start button SB, a stop button SB1, a normally-closed contact YW-1 of an exhaust pressure protector, a normally-opened contact YC-1 of an oil pressure protector and an alternating current contactor KM. A normally-opened contact KM-1 of the alternating current contactor KM is connected in parallel with the two ends of the start button SB, and a normally-closed contact YC-2 of the oil pressure protector and a time relay KT are connected in series between the normally-closed contact YW-1 of the exhaust pressure protector and the ground. According to the compressor operation protective device, a pressure controller, a differential pressure controller and the time relay which are simple and common are combined to form a motor operation protective circuit, work is reliable and stable, and the circuit is simple in structure and easy to achieve.

Description

Compressor operating protective gear

Technical field

The utility model relates to a kind of large-scale compressor running protection device, relates in particular to the compressor operating protective gear that a kind of screw machine, piston machine can be general.

Background technique

At present for many relatively large piston compressors and screw compressor; the protective circuit kind of its use is more, have monolithic processor controlled, also relate to other detect control instrument mixed with electrical control; mostly use light current to be combined with forceful electric power, remove to control forceful electric power electrical equipment with light current.Because equipment component is long service life, its protective circuit is greasy can't bear, and drawing is lost already, is difficult to search while having fault, between electrical maintenance and instrument maintenance, mutually shifts responsibility onto others, and causes equipment normally not drive.

Vibrations while driving due to piston compressor and screw compressor, noise is large especially, is arranged on single-chip microcomputer element fault in its Direct box also more, and the each producer of single-chip microcomputer difference, if damage, can only buy to former producer, therefore its price is surprising.Change also longer from buying the arrival time, therefore impact produce, work passive.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned defect; provide one to utilize pressure controller, differential pressure controller, the time relay to be combined into protective circuit device; simple in structure; be easy to realize the compressor operating protective gear being all suitable for for various piston compressors and screw compressor.

For achieving the above object; a kind of compressor operating protective gear of the utility model design; comprise the main circuit that is connected in parallel on protected device two ends; on described main circuit, be connected in series with power switch K; described power switch K is connected with safety fuse cutout FU; on first circuit between described safety fuse cutout FU and ground, be connected in series with power supply indicator HL3, its specialization is:

On described main circuit, be connected in series with the normally closed interlock YW-1 of start button SB, stop button SB1, exhaust pressure protector, normally open contact YC-1, the A.C. contactor KM of oil pressure protector, the normally open contact KM-1 of described A.C. contactor KM is connected in parallel on described start button SB two ends, is connected in series the normally closed YC-2 of oil pressure protector contact, time relay KT between the normally closed interlock YW-1 of described exhaust pressure protector and ground; The normally open contact KT-3 of described time relay KT is connected in parallel on the two ends of start button SB and stop button SB1, and described exhaust pressure protector normally open contact YW-3 is connected in parallel on the two ends of start button SB and stop button SB1; On branch road between normally open contact YW-2 and the ground of described exhaust pressure protector, be connected in series with the high tutorial light HL2 of exhaust pressure; the normally closed interlock KT-1 of the two ends time relay in parallel of the normally open contact YC-1 of described oil pressure protector; one end of the normally open contact KT-2 of the described time relay connects the normally closed YC-2 of oil pressure protector contact, and the other end connects low fuel pressure tutorial light HL1.

In technique scheme, can be provided with the two or more compressor operating protective gears that are connected in series, can be simultaneously as multiple compressor protection devices of operation simultaneously.

The utility model adopts technique scheme, has following advantages and good effect:

1, the utility model adopts simple common pressure controller, differential pressure controller, and the time relay is combined into motor running protection circuit, reliable and stable work, circuit structure is simple, is easy to realize.

2, the utility model circuit structure can expand to several protective circuits through row series connection, can be suitable for various piston compressors and screw compressor, highly versatile.

Accompanying drawing explanation

Fig. 1 is a kind of circuit theory diagrams of compressor operating protective gear;

In figure: 1-main circuit; First circuit of 2-.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

Compressor operating protective gear as shown in Figure 1, comprise the main circuit 1 that is connected in parallel on protected device two ends, on main circuit 1, be connected in series with power switch K, power switch K is connected with safety fuse cutout FU, on first circuit 2 between safety fuse cutout FU and ground, is connected in series with power supply indicator HL3; On main circuit 1, be connected in series with the normally closed interlock YW-1 of start button SB, stop button SB1, exhaust pressure protector, normally open contact YC-1, the A.C. contactor KM of oil pressure protector, the normally open contact KM-1 of A.C. contactor KM is connected in parallel on start button SB two ends, is connected in series the normally closed YC-2 of oil pressure protector contact, time relay KT between the normally closed interlock YW-1 of exhaust pressure protector and ground; The normally open contact KT-3 of time relay KT is connected in parallel on the two ends of start button SB and stop button SB1, and exhaust pressure protector normally open contact YW-3 is connected in parallel on the two ends of start button SB and stop button SB1; On branch road between normally open contact YW-2 and the ground of exhaust pressure protector, be connected in series with the high tutorial light HL2 of exhaust pressure; the normally closed interlock KT-1 of the two ends time relay in parallel of the normally open contact YC-1 of oil pressure protector; one end of the normally open contact KT-2 of the time relay connects the normally closed YC-2 of oil pressure protector contact, and the other end connects low fuel pressure tutorial light HL1.

Its working principle is:

When operation, power turn-on switch, power supply indicator HL3 is bright, presses electric motor starting button SB, and A.C. contactor KM obtains electric adhesive, the closed self-insurance of normally open contact KM-1 of A.C. contactor KM, motor operation.Time relay KT obtains electric work simultaneously, while arriving setup times, and time relay KT action, the normally closed interlock KT-1 of its time relay disconnects, the normally open contact KT-3 closure of the normally open contact KT-2 of the time relay and time relay KT.

If oil pressure reaches normal value in setup times, the normally open contact YC-1 closure of oil pressure protector, motor normally moves, and the normally closed YC-2 of oil pressure protector contact disconnects, time relay KT dead electricity, time relay KT dead electricity quits work.If when in setup times, oil pressure is lower than normal setting value, the normally open contact YC-1 of oil pressure protector, the normally closed YC-2 of the oil pressure protector contact maintenance ortho states of being failure to actuate, motor is out of service, and the tutorial light of low fuel pressure simultaneously HL1 lights, and oil pressure has been protected.

If when when operation, exhaust pressure exceeds setting value; exhaust pressure protector YW action; the normally closed interlock YW-1 of exhaust pressure protector disconnects; the normally open contact YW-2 of exhaust pressure protector; the closed motor of exhaust pressure protector normally open contact YW-3 is out of service, the high tutorial light of exhaust pressure bright (exhaust pressure is high have been protected).

This circuit theory is simple; but powerful; be easy to safeguard; during with electrical connection; only need 4 points just can complete, while having multiple compressor needing protection, the utility model series connection can be able to be completed to protection; can be suitable for various piston compressors and screw compressor, protective gear practical.

The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.

Claims

1. a compressor operating protective gear; comprise the main circuit (1) that is connected in parallel on protected device two ends; described main circuit is connected in series with power switch K on (1); described power switch K is connected with safety fuse cutout FU; on first circuit (2) between described safety fuse cutout FU and ground, be connected in series with power supply indicator HL3, it is characterized in that:

On described main circuit (1), be connected in series with the normally closed interlock YW-1 of start button SB, stop button SB1, exhaust pressure protector, normally open contact YC-1, the A.C. contactor KM of oil pressure protector,

The normally open contact KM-1 of described A.C. contactor KM is connected in parallel on described start button SB two ends, is connected in series the normally closed YC-2 of oil pressure protector contact, time relay KT between the normally closed interlock YW-1 of described exhaust pressure protector and ground;

The normally open contact KT-3 of described time relay KT is connected in parallel on the two ends of start button SB and stop button SB1, and described exhaust pressure protector normally open contact YW-3 is connected in parallel on the two ends of start button SB and stop button SB1;

On branch road between normally open contact YW-2 and the ground of described exhaust pressure protector, be connected in series with the high tutorial light HL2 of exhaust pressure; the normally closed interlock KT-1 of the two ends time relay in parallel of the normally open contact YC-1 of described oil pressure protector; one end of the normally open contact KT-2 of the described time relay connects the normally closed YC-2 of oil pressure protector contact, and the other end connects low fuel pressure tutorial light HL1.

2. compressor operating protective gear according to claim 1, is characterized in that: be provided with the two or more compressor operating protective gears that are connected in series.