CN201916175U

CN201916175U - Overspeed protecting device of air compressor

Info

Publication number: CN201916175U
Application number: CN2011200175741U
Authority: CN
Inventors: 赵云端; 董南南; 毕波; 罗力兵; 梅波
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-05
Filing date: 2011-01-05
Publication date: 2011-08-03
Anticipated expiration: 2021-01-05

Abstract

The utility model relates to an overspeed protecting device of an air compressor, belonging to the overspeed protecting device which runs under a safe working speed in protection equipment. Three magnetoelectric probes of the overspeed protecting device of the air compressor are evenly arranged on a speed detecting disk of the air compressor, the three magnetoelectric probes respectively enter into three passageways of an electric overspeed protector, the three passageways of the electric overspeed protector are respectively connected with a relay, each relay is connected with an electromagnetic valve, three electromagnetic valves are evenly arranged on the outer wall of a two-in-three redundancy speed gate, the two-in-three redundancy speed gate is internally provided with three oil ways, and three outlets of the three electromagnetic valves are respectively connected with the three oil ways of the two-in-three redundancy speed gate. The overspeed protecting device can timely and exactly perform the vehicle jump when a rotate speed reaches at a fixed point value to protect the safety of a set, the set does not need to perform the trial vehicle bump on the spot, and the unnecessary abrasion and erosion to the compressor can be furthest avoided.

Description

The air compressor overspeed governor switch

Technical field

The utility model belongs to the overspeed governor switch that protection equipment moves under the working speed of safety, what be specifically related to is the air compressor overspeed governor switch.

Background technique

Daqing petrochemical company chemical fertilizer factory synthesizer air compressor (101J) is the very important equipment of synthesizer; this big unit adopts turbine to drive; overspeed protection system is the mechanical overspeed protection control protective system at random, is used for guaranteeing that unit moves under the working speed of safety.

Be difficult for obtaining because machinery is jumped the car rotating speed, and consume a large amount of steam, there is certain danger in turbine itself.And the mechanical overspeed protection control protection was jumped owing to mistake once appears in reasons such as the equipment time limit is long and wear out, and safety in production causes very large loss to device.This big unit turbine maintenance back is before going into operation; need jump the car test at the scene repeatedly to turbine; guaranteeing making the unit hypervelocity jump car when steam generation changes driving, thereby avoid the generation of unit hypervelocity runaway accident, with protection unit and post personnel's safety.During turbine trial jump, turbine needs to carry out unit trial jump with the Compressor Group disconnection, need operator's execute-in-place, dropping into steam gets into smooth unit, after unit reaches the speed regulator rotating speed, rely on mechanical governor to regulate synchronizer and carry out the adjustment of rotating speed, make unit jump car and obtain to jump the car rotating speed simultaneously, it is just qualified to want continuous trial jump all to reach regulation jumping car value for three times in principle.Turbine rises to from zero rotating speed and jumps the car rotating speed in short time like this, and get back to zero rotating speed from jumping the car rotating speed, turbine itself is had certain harm, and the steam flow that enters turbine simultaneously constantly changes, and turbine speed and cylinder body runner are had certain erosion effect.

Summary of the invention

The purpose of this utility model provides the air compressor overspeed governor switch, and it is used to solve existing air compressor when adopting the mechanical overspeed protection control protective system, carries out the problem that turbine trial jump process works the mischief to turbine after the device general overhaul.

The technological scheme that its technical problem that solves the utility model adopts is: this air compressor overspeed governor switch is popped one's head in by magnetoelectric; the electrical overspeed protector; relay; solenoid valve; three select two redundant speed to close device constitutes; the magnetoelectric probe is three; three magnetoelectric probes are installed on the tachometer disc of air compressor; three magnetoelectric probes enter three passages of electrical overspeed protector respectively; three passages of electrical overspeed protector are connected with relay respectively; each relay connects solenoid valve; three solenoid valves are installed in three and select two redundant speed to close on the outer wall of device; three select two redundant speed to close device inside three oil circuits, and the outlet of three solenoid valves selects three oil circuits that two redundant speed are closed device to be connected with three respectively.

The utlity model has following beneficial effect:

1; the utility model can be exactly when rotating speed reaches fixed-point value; promptly and accurately jump car; the protection unit safety; unit does not need on-the-spot trial jump; but the car rotating speed is jumped in direct modeling on indoor electronics over speed protection; whether observe on-the-spot oil-controlled valve breaks off relations and gets final product; can save like this mechanical overspeed protection control protective gear before going into operation trial jump to the loss of steam; and can protect compressor to avoid unnecessary wearing and tearing and erosion to greatest extent; simultaneously greatly the minimizing operator work on the spot amount and the time of degree, reduced security incident appears in operator in device probability effectively.

2, the utility model can obtain considerable economic.Adopt the utility model can save the time that original mechanical overspeed protection control protection needs test; according to every year once unit inspection (robbing) cultivate calculation; needed calculate in one day according to protection test; 2400 tons of urea output every day; 2000 yuan of urea prices per ton, can obtain ten thousand yuan of economic benefit: 0.2x2400=480 every year indirectly.

3, compressor is a key equipment in the device production process, is again the very high hazardous equipment of risk class, and factory all takes the measure of providing special care to, and prevents accidents such as unit generation driving, surge, leakage, exploding and firing.Therefore the safe operation of unit is related to whole device, even influences the safety in production of full factory.In a single day the unit accident takes place, and consequence is all very serious, and the lighter causes device damage, and factory needs the long period repairing, and weight person can blast, fire accident, and follows personnel casualty accidents, loses huge.The utility model is both safe and energy-conservation protective system, can be extremely low-level dropping to of hypervelocity runaway accident, reduce the generation of unit accident, and can bring the huge social benefit again.

Description of drawings

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

1 magnetoelectric, 2 electrical overspeed protectors, 3 relays, 4 solenoid valves 5 three of popping one's head in select two redundant speed to close devices

Embodiment

In conjunction with the accompanying drawings the utility model is described further:

As shown in Figure 1; this air compressor overspeed governor switch has three magnetoelectric probes 1; three magnetoelectric probes 1 are installed on the tachometer disc of air compressor; three magnetoelectric probes 1 enter three passages of electrical overspeed protector 2 respectively; be passage A; channel B; channel C; the passage A of electrical overspeed protector 2; channel B; channel C is connected with relay 3 respectively; three relays 3 connect solenoid valve 4 again respectively; three solenoid valves 4 all are attached to three and select two redundant speed to close on the outer wall of device 5; three to select two redundant speed to close devices 5 be that known speed is closed assembly; three select two redundant speed to close device 5 inside three oil circuits, and the outlet of three solenoid valves 4 selects three oil circuits that two redundant speed are closed device 5 to be connected with three respectively.By three magnetoelectrics, the 1 in-site measurement generating unit speed of popping one's head in; three magnetoelectric probes 1 advance three passages of electrical overspeed protector 2 respectively; after electrical overspeed protector 2 detects the unit hypervelocity; send trip signal to solenoid valve 4; solenoid valve 4 sends action; three passages of three solenoid valve 4 each corresponding electrical overspeed protectors 2; when two actions are arranged in three solenoid valves 4; three select two redundant speed to close device 5 just cuts away governor oil; main stop valve is closed rapidly by the strength of spring own; cut steam enters; steam turbine cuts out; adopt the utility model unit not need on-the-spot trial jump, but the car rotating speed is jumped in direct modeling on the electrical overspeed protector 2 of indoor setting, whether the oil-controlled valve of observing the scene breaks off relations and gets final product.The utility model is provided with conveniently, accurately, overcome machinery and adjust hypervelocity and jump car fixed-point value difficulty, easy defectives such as drift, it three selects two functions can effectively avoid compressing chance error to jump, guarantee to keep the safety in production.The high reliability of electrical overspeed protector 2 can effectively be stopped the great serious accident of big unit hypervelocity driving, guarantees safety in production.

Claims

1. air compressor overspeed governor switch; it is characterized in that: this air compressor overspeed governor switch is by magnetoelectric probe (1); electrical overspeed protector (2); relay (3); solenoid valve (4); three select two redundant speed to close device (5) constitutes; magnetoelectric probe (1) is three; three magnetoelectric probes (1) are installed on the tachometer disc of air compressor; three magnetoelectric probes (1) enter three passages of electrical overspeed protector (2) respectively; three passages of electrical overspeed protector (2) are connected with relay (3) respectively; each relay (3) connects solenoid valve (4); three solenoid valves (4) are installed in three and select two redundant speed to close on the outer wall of device (5); three select two redundant speed to close device (5) inside three oil circuits, and the outlet of three solenoid valves (4) selects three oil circuits that two redundant speed are closed device (5) to be connected with three respectively.