CN2069969U

CN2069969U - Alarm for reciprocating grate

Info

Publication number: CN2069969U
Application number: CN 89200117
Authority: CN
Inventors: 范继芳
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-12-31
Filing date: 1988-12-31
Publication date: 1991-01-23

Abstract

The utility model relates to an alarm for reciprocating grate, which installs a control circuit in the box body of a control box. An overload protection electrothermal relay is connected in the control circuit. An acoustic alarm circuit is formed in series by a touching switch which is closed constantly of an intermediate relay in the control circuit and an alarm bell. A bell and a signal lamp used for alarming are installed on the box body. When the reciprocating grate goes wrong and a grate electrical machine is overloaded or phase failure, the signal lamp and the bell all can alarm and make the grate electrical machine stop work. The alarm for reciprocating grate has reliable protective action for the reciprocating grate and the grate electrical machine.

Description

Alarm for reciprocating grate

The utility model is a kind of reciprocal grate alarming protector, and it has the reliable protection effect to reciprocal grate.

At present, the motor of domestic reciprocal grate is only installed fuse on the main circuit of three phase mains, and like this, only short circuit shields to motor, and fire grate is transshipped owing to the mechanical breakdown of fire grate or " phase shortage " turns round and do not have protective effect.Therefore, cause fire grate often to burn decelerator and crank connecting link often destroys, boiler can not be run well.

Problem in view of above-mentioned prior art existence; the purpose of this utility model is: design and a kind ofly all can pass through signal lamp, alarm bell warning owing to the reciprocal grate fault makes the fire grate overload or the phase failure; and can make fire grate alarming protector out of service, reciprocal grate, fire grate there are the reliable protection effect.

The structure of reciprocal grate alarming protector mainly is made up of five parts such as control cabinet casing 1, control circuit 2, main circuit 3, warning electric bell 4, signal lamps 5; it is based on casing; control element is installed in the casing; signal lamp is installed on chamber door or the tank wall, and emergency alarm bell is installed on chamber door or the tank wall.From line map 3; main circuit: fire grate all adopts 380 volts of AC powers of three-phase; be switched on or switched off motor with the main contacts with A.C. contactor in the power switch HK introducing control cabinet, fire grate has short-circuit protection fuse RD and overload protection electrothermal relay RJ.Control circuit adopts 220 volts of ac power supplies, operation circuit to be connected on all by fuse RD, stop button, starting button 1QA, contactor coil C, electrothermal relay RJ that ABC is arbitrary to be gone up mutually, 220 volts of voltage-to-grounds.The coil ZJ of auxiliary reclay ₁ZJ ₂ZJ ₃All be connected in parallel on the ABC three-phase 220 volts of this loop voltage-to-grounds.Article three, acoustic alarm loop is in series by the normally-closed contact and the emergency alarm bell of auxiliary reclay, and they are connected in parallel on respectively on the ABC three phase mains, 220 volts of each loop voltage-to-grounds.Article three, light alarm circuit is in series by the normally opened contact and the signal lamp of auxiliary reclay, and they are connected on respectively on the ABC three phase mains, each loop voltage-to-ground 220V.

The utility model is compared with prior art has outstanding substantive distinguishing features and good effect.Prior art can only be protected the short trouble of electric wiring and motor because fuse only is installed on the main circuit of fire grate.And the utility model in the main circuit except being connected to fuse, also be connected to the heater element of electrothermal relay, and in control circuit, be connected to auxiliary reclay, signal lamp, alarm bell, when catching phenomenon appears in fire grate, and the fire grate load is increased, during fire grate electric current overrate, can in time report to the police by signal lamp and alarm bell.When the main circuit or the fire grate phase failure, also can report to the police, and motor is shut down by signal lamp and alarm bell, fire grate and fire grate all there are protective effect.Prior art is not owing to there is warning device, and when reciprocal grate broke down, the fire grate overload operation often made fire grate burn, and decelerator and toggle damage, and have increased maintenance cost and maintenance time like this.

Description of drawings:

Fig. 1 reciprocal grate alarm front view

Fig. 2 reciprocal grate alarm vertical view

Fig. 3 reciprocal grate alarm circuit schematic diagram

Fig. 1, Fig. 2, Fig. 3 show a kind of embodiment of reciprocal grate alarming protector; as shown in the figure; the structure of reciprocal grate alarming protector mainly is made up of control cabinet casing 1, control circuit 2, main circuit 3, warning electric bell 4, signal lamp 5 five parts; it is based on casing; control element is installed in the casing; signal lamp is installed on chamber door 6 or the tank wall, and emergency alarm bell is installed on chamber door or the tank wall.From line map 3, main circuit, fire grate all adopt 380 volts of AC powers, introduce in the control cabinet with power switch HK, are switched on or switched off motor with the main contacts of A.C. contactor, and fire grate has short-circuit protection fuse RD and overload protection electrothermal relay RJ.Control circuit adopts 220 volts of ac power supplies.When operation, when closing HK, intermediate relay ZJ ₁ZJ ₂ZJ ₃Coil flows through electric current, makes the relay magnet adhesive, and the normally opened contact of relay is connected, and normally-closed contact disconnects, and at this moment three signal lamps are bright, and it is static that alarm bell keeps.When pressing starting button 1QA, ac contactor coil C forms the loop and produces electromagnetic induction adhesive magnet, makes main contacts C ₁C ₂C ₃Connect fire grate D entry into service.When fire grate ran well, three signal lamps were bright, and alarm bell does not ring.The corresponding increase of fire grate load when fire grate generation clamping stagnation situation, when the electric current overrate of motor D, fuse RD _ARD _BRD _CIn a certainly open circuit intermediate relay ZJ mutually ₁ZJ ₂ZJ ₃In corresponding one outage mutually, often the opening of auxiliary reclay, normally-closed contact reset.At this moment, the signal lamp of this phase extinguishes.The alarm bell of this phase rings.Fix a breakdown if the staff is untimely, because current of electric progressively increases, impel the bending of electrothermal relay bimetal leaf, the rupturing operation loop makes the ac contactor coil outage, main contact C ₁C ₂C ₃Reset, if protected motor and the overload operation of fire grate fire grate, and RD _ARD _BRD _CThree-phase does not all open circuit, and electrothermal relay RJ bimetal leaf is along with the increase of temperature, and is crooked to the B point from the A point, and when promptly separating with the connection of B point with the A point, alarm bell is reported to the police.Three signal lamps this moment light yellow simultaneously also.When bimetal leaf separated with the A point, fire grate had also stopped running simultaneously.

Claims

1, on the main circuit of reciprocal grate motor fuse is installed, it is characterized in that being connected with the overload protection electrothermal relay in control circuit, the normally-closed contact of the auxiliary reclay in the control circuit and emergency alarm bell series connection constitute the acoustic alarm loop; The series connection of the normally opened contact of auxiliary reclay and signal lamp constitutes the light alarm circuit, has one to open circuit mutually in fire grate or circuit, or during the fire grate overload, all can report to the police by signal lamp and alarm bell.