CN201638356U

CN201638356U - Grounding disconnection alarm

Info

Publication number: CN201638356U
Application number: CN2010201717324U
Authority: CN
Inventors: 杨宏运; 王泽铭; 朱万祥
Original assignee: Jiangsu Jingong Technology Group Co Ltd
Current assignee: Jiangsu Jingong Technology Group Co Ltd
Priority date: 2010-04-27
Filing date: 2010-04-27
Publication date: 2010-11-17
Anticipated expiration: 2020-04-27

Abstract

The utility model relates to a grounding disconnection alarm, which is capable of displaying field alarm and outputting on-off signals to a computer control system, and is designed for preventing electrostatic hazards for handling of liquid petroleum products in tank farms. The grounding disconnection alarm is mainly applicable to controlling, monitoring and alarming for electrostatic grounding in inflammable occasions, such as petrochemical environment, tank farm delivery platforms, gas stations, tanker handling locations and the like, and reliably guarantees static conduction during delivery operation. The grounding disconnection alarm comprises an alarm circuit, a control signal circuit, an alarm circuit case, a control signal circuit case and a connecting cable. The alarm circuit case is connected with the control signal circuit case through the connecting cable. A printed circuit board and electronic components are mounted inside the alarm circuit case, and a relay, an indication lamp and a bell are mounted inside the control signal circuit case. The alarm circuit includes a power transformer T, bridge rectifiers D1-D4, a triode D5, a photoelectric coupler D6, a bidirectional thyristor D7, capacitors C2-C2 and resistors R1-R5.

Description

Ground disconnecting alarm

Technical field

The utility model ground disconnecting alarm relates to be a kind of to liquid petroleum product in the loading and unloading of oil depot district, prevent electrostatic hazard and the onsite alarming that designs shows and have the disconnected ground warning device of exporting to the computer control system switching signal.This device is applicable to that mainly petrochemical complex, oil depot pay inflammable and explosive places such as goods platform, refuelling station, tank car loading and unloading and make electrostatic grounding control monitoring, alarming, makes the static of paying in the oily operation of leading obtain reliable assurance.

Background technology

In tank car loading and unloading liquid petroleum product process, because liquid petroleum flows, be easy to generate static in equipment or pipeline, when electrostatic potential during greater than 350V, its discharge spark just can cause the liquid petroleum burning and explode.For preventing electrostatic accumulation, routine is taked at tank car loading and unloading ride place earthing device to be installed, but earthing device whether good normal armrest sense range estimation of ground connection or portable measuring method for measuring, the anti-explosion safety performance is unreliable.At present, the ground alarm that the common assay method on the market adopts is the mode that adds hummer with dry cell power supply, miniature combination, warning LED substantially, and on-the-spot vision is not eye-catching, and the tinkle of bells is little, observes inconvenient, unreliable, impracticable.

Summary of the invention

The purpose of this utility model is to provide a kind of ground disconnecting alarm at above-mentioned weak point, it is a kind of ground disconnecting alarm of abnormal type, can on-the-spotly show, vision is very eye-catching, can provide the computer control system switching signal again, realize that simultaneously on-site signal shows and on-the-spot two kinds of functions that the computer control system switching signal is provided.Adopt the 220V ac power supply, can make the enough long novel ground disconnecting alarm of alarm continuous working.

Ground disconnecting alarm is realized by the following technical solutions: ground disconnecting alarm comprises alarm circuit, control signal circuit, alarm circuit box, control signal circuit box and connection cable; The alarm circuit box is connected with the control signal circuit box by connection cable.Described alarm circuit box and control signal circuit box all are provided with fixed orifice or fixed support are housed, and are convenient to alarm circuit box, control signal circuit box are installed on the tank car loading and unloading ride.Two bi-colour LEDs and alarm bell are equipped with in the signal demonstration, and main as the indication of reporting to the police, auxiliary reclay contact J1, J2, J3 offer pilot lamp, alarm bell, computer control system switching signal simultaneously; Printed circuit board and electronic component are housed in the alarm circuit box, relay, pilot lamp, alarm bell are housed in the control signal circuit box.

Alarm circuit comprises power transformer T, bridge rectifier D 1-D4, triode D5, photoelectrical coupler D6, bidirectional triode thyristor D7, capacitor C 1-C2 and resistance R 1-R5; The control signal circuit comprises relay ZJ, red led HR, green indicating lamp HG and alarm bell HB.In the ground disconnecting alarm circuit, the elementary L of power transformer T, N termination are gone into the 220V AC power, input 1 and 2 ends of T level of transformer connection rectifier D1-D4, the output terminal 3 of rectifier D1-D4 connects emitter e and capacitor C 1 negative pole of triode D5, output terminal 4 ends of rectifier D1-D4 connect the CZ1 terminal to earthing clamp, connect capacitor C 1 anodal and resistance R 2 simultaneously, 1 end of resistance R 2 another termination photoelectrical coupler D6, the collector c of triode D5 connects 2 ends of photoelectrical coupler D6, and the base stage b of triode D5 connects resistance R 1 back and connects the CZ2 terminal; 3 ends of photoelectrical coupler D6 connect the G utmost point of resistance R 5 and bidirectional triode thyristor D7, and 4 ends of photoelectrical coupler D6 connect resistance R 3, and the A2 utmost point of resistance R 3 other ends and resistance R 4 one ends and bidirectional triode thyristor D7 is connected in power supply phase line L and CZ3 terminal; Resistance R 4 other ends link to each other with capacitor C 2 one ends, and the A1 utmost point of capacitor C 2 other ends and resistance R 5 other ends and bidirectional triode thyristor D7 is connected to the CZ5 terminal; Power transformer T zero line N directly goes between to the CZ4 terminal.

In the control signal circuit, CZ3, CZ4, the corresponding end with alarm circuit of CZ5 terminal connect, CZ4 and CZ5 terminal provide intermediate relay ZJ 220V alternating voltage, and intermediate relay ZJ normally closed contact J1 connects 220V red led HR, and alarm bell HB is in parallel with red led HR; Normally opened contact J2 connects 220V green indicating lamp HG, and normally opened contact J3 links to each other with computing machine, and normally opened contact J3 provides the computer control system switching signal; Intermediate relay ZJ normally closed contact J1 and normally opened contact J2 also are connected to alarm CZ3 terminal.When on-the-spot tank car and earthing device were in shape, CZ5 and CZ4 terminal obtained the 220V alternating voltage, and intermediate relay ZJ gets electric, contact J2 closure, and green indicating lamp HG is bright, illustrates that on-the-spot loading and unloading oils can normal operation.If when tank car and earthing device loose contact, CZ5 and CZ4 terminal do not obtain the 220V alternating voltage, and intermediate relay ZJ is not worked, contact J1 auto-closing, CZ3, the input of CZ4 terminal 220V AC power, the bright and alarm bell HB sound of red led HR illustrates that on-the-spot loading and unloading oils cannot operation.

Principle of work: in the ground disconnecting alarm circuit, the elementary access 220V of power transformer T AC power phase line L and zero line N end, T level of power transformer inserts bridge rectifier D 1-D4 rectification, through capacitor C 1 DC filtering; Be connected to tank car by CZ1 terminal to earthing clamp, CZ2 terminal to earthing clamp is connected to earthing device (user's configuration), when on-the-spot tank car and earthing device are in shape, be that CZ1, CZ2 terminal join, the conducting of triode D5,3 pin of photoelectrical coupler D6 and 4 pin conductings, trigger A1, the A2 conducting of bidirectional triode thyristor D7, CZ5 and CZ4 terminal obtain the 220V AC supply voltage, intermediate relay ZJ gets, corresponding indication green light HG shows, gives the computer control system switching signal by the J3 contact simultaneously.Otherwise, when tank car and earthing device loose contact, be that CZ1 terminal and CZ2 terminal are obstructed, triode D5, photoelectrical coupler D6, all not conductings of bidirectional triode thyristor D7 thereupon, CZ5 and CZ4 terminal do not obtain the 220V alternating voltage, the intermediate relay ZJ dead electricity, the J1 closing of contact, CZ3 and CZ4 terminal obtain the 220V alternating voltage, the bright and alarm bell sound of corresponding indication red light HR, the J3 contact discharges, and the prompting operating personnel also stops operation.

The utility model ground disconnecting alarm adopts the optocoupler isolation technology; thoroughly eliminate the issuable harm of 220V alternating voltage; thereby it is safe and reliable in feasible the application; and can both obtain the protection of high-quality; reduced quality requirements simultaneously to electronic component; reduce the circuit debugging workload, reduced production cost of products.

Ground disconnecting alarm has following distinguishing feature:

1, the utility model is controlled warning circuit by on-the-spot earthing clamp contact condition, and is highly sensitive, good reliability.

2, operate to the computer switch signal and by computer control system.

3, warning circuit adopts the 220V AC-powered, need not worry battery serviceable life.

Show and alarm bell with the 220V bi-colour LED that 4, enlarge vision, sound is loud and clear.

5, the utility model ground disconnecting alarm adopts the photoelectric coupler isolation technology, thoroughly eliminates the issuable harm of 220V alternating voltage, thereby safe and reliable in feasible the application.

The utility model ground disconnecting alarm is on the basis of comprehensive existing various simple and easy static electricity earthing device characteristics, the substitute products of a kind of practicality of developing, safety, reliable, design uniqueness, and can provide the computer control system switching signal, have highly sensitive, good stability, easy to use, remarkable advantage that applicability is strong, realize that oil depot irrigated area operation prevents the harm that static causes.

Description of drawings

Below be with the utility model is described in further detail in conjunction with the accompanying drawings:

Fig. 1 is the ground disconnecting alarm electrical schematic diagram.

Fig. 2 is a ground disconnecting alarm control signal circuit diagram.

Embodiment

With reference to Fig. 1,2, ground disconnecting alarm comprises alarm circuit, control signal circuit, alarm circuit box, control signal circuit box and connection cable; The alarm circuit box is connected with the control signal circuit box by connection cable.Described alarm circuit box and control signal circuit box all are provided with fixed orifice or fixed support are housed, and are convenient to alarm circuit box, control signal circuit box are installed on the tank car loading and unloading ride.Two bi-colour LEDs and alarm bell are equipped with in the signal demonstration, and main as the indication of reporting to the police, auxiliary reclay contact J1, J2, J3 offer pilot lamp, alarm bell, computer control system switching signal simultaneously; Printed circuit board and electronic component are housed in the alarm circuit box, relay, pilot lamp, alarm bell are housed in the control signal circuit box.

Alarm circuit comprises that power transformer T, bridge rectifier D 1-D4, triode D5, optocoupler D6, bidirectional triode thyristor D7, capacitor C 1-C2, resistance R 1-R5, relay ZJ, pilot lamp HR, HG, alarm bell HB constitute.Relay, pilot lamp, alarm bell reflect in Fig. 2.CZ1 terminal connection earthing clamp is connected to tank car in the circuit, and the CZ2 terminal connects earthing clamp and is connected to earthing device, the elementary access 220V of power transformer T AC power phase line L and zero line N; T level of power transformer inserts bridge rectifier D 1-D4, through capacitor C 1 DC filtering; When on-the-spot tank car and earthing device were in shape, promptly CZ1, CZ2 terminal communicated, triode D5 conducting, and 4 pin of photoelectrical coupler D6 and 3 pin conductings, the G utmost point that triggers bidirectional triode thyristor D7 makes A1 and A2 conducting; CZ5 and CZ4 terminal obtain the 220V alternating voltage.Otherwise when tank car and earthing device loose contact, promptly CZ1 and CZ2 terminal are obstructed, triode D5, photoelectrical coupler D6, all not conductings of controllable silicon D7 thereupon, and CZ5 and CZ4 terminal do not obtain the 220V alternating voltage.

With reference to accompanying drawing 2, the control signal circuit of the utility model ground disconnecting alarm comprises relay ZJ, red led HR, green indicating lamp HG and alarm bell HB.In the control signal circuit, CZ3, CZ4, CZ5 terminal are consistent with Fig. 1.CZ4 and CZ5 terminal provide intermediate relay ZJ 220V alternating voltage.Intermediate relay ZJ normally closed contact J1 connects 220V red led HR, and alarm bell HB is in parallel with red led HR; Normally opened contact J2 connects 220V green indicating lamp HG, and normally opened contact J3 provides the computer control system switching signal; Intermediate relay ZJ normally closed contact J1 and normally opened contact J2 also are connected to alarm CZ3 terminal.When on-the-spot tank car and earthing device were in shape, CZ5 and CZ4 terminal obtained the 220V alternating voltage, and intermediate relay ZJ gets electric, contact J2 closure, and green indicating lamp HG is bright, illustrates that on-the-spot loading and unloading oils can normal operation.If when tank car and earthing device loose contact, CZ5 and CZ4 terminal do not obtain the 220V alternating voltage, and intermediate relay ZJ is not worked, contact J1 auto-closing, CZ3, the input of CZ4 terminal 220V AC power, the bright and alarm bell HB sound of red led HR illustrates that on-the-spot loading and unloading oils cannot operation.

Components and parts in components and parts in this broken circuit alarmer electrical schematic diagram 1 and the control signal circuit diagram 2 are divided in two ambroin boxes, connect link terminal CZ3, CZ4, CZ5 in two boxes by cable.The main components and parts that broken circuit alarmer adopts, photoelectrical coupler D6 selects 3081 for use, and bidirectional triode thyristor D7 selects for use BT136. to define from entire circuit: easy, practical, safe, reliable.

Claims

1. a ground disconnecting alarm is characterized in that comprising alarm circuit, control signal circuit, alarm circuit box, control signal circuit box and connection cable; The alarm circuit box is connected with the control signal circuit box by connection cable; Printed circuit board and electronic component are housed in the alarm circuit box, relay, pilot lamp, alarm bell are housed in the control signal circuit box;

Alarm circuit comprises power transformer T, bridge rectifier D 1-D4, triode D5, photoelectrical coupler D6, bidirectional triode thyristor D7, capacitor C 1-C2 and resistance R 1-R5; The control signal circuit comprises relay ZJ, red led HR, green indicating lamp HG and alarm bell HB; In the ground disconnecting alarm circuit, the elementary L of power transformer T, N termination are gone into the 220V AC power, input 1 and 2 ends of T level of transformer connection rectifier D1-D4, the output terminal 3 of rectifier D1-D4 connects emitter e and capacitor C 1 negative pole of triode D5, output terminal 4 ends of rectifier D1-D4 connect the CZ1 terminal to earthing clamp, connect capacitor C 1 anodal and resistance R 2 simultaneously, 1 end of resistance R 2 another termination photoelectrical coupler D6, the collector c of triode D5 connects 2 ends of photoelectrical coupler D6, and the base stage b of triode D5 connects resistance R 1 back and connects the CZ2 terminal; 3 ends of photoelectrical coupler D6 connect the G utmost point of resistance R 5 and bidirectional triode thyristor D7, and 4 ends of photoelectrical coupler D6 connect resistance R 3, and the A2 utmost point of resistance R 3 other ends and resistance R 4 one ends and bidirectional triode thyristor D7 is connected in power supply phase line L and CZ3 terminal; Resistance R 4 other ends link to each other with capacitor C 2 one ends, and the A1 utmost point of capacitor C 2 other ends and resistance R 5 other ends and bidirectional triode thyristor D7 is connected to the CZ5 terminal; Power transformer T zero line N directly goes between to the CZ4 terminal;

In the control signal circuit, CZ3, CZ4, the corresponding end with alarm circuit of CZ5 terminal connect, CZ4 and CZ5 terminal provide intermediate relay ZJ 220V alternating voltage, and intermediate relay ZJ normally closed contact J1 connects 220V red led HR, and alarm bell HB is in parallel with red led HR; Normally opened contact J2 connects 220V green indicating lamp HG, and normally opened contact J3 links to each other with computing machine, and normally opened contact J3 provides the computer control system switching signal; Intermediate relay ZJ normally closed contact J1 and normally opened contact J2 also are connected to alarm CZ3 terminal.

2. ground disconnecting alarm according to claim 1 is characterized in that described alarm circuit box and control signal circuit box all are provided with fixed orifice or fixed support is housed.