CN2814377Y - Comprehensive tester for safety anti-explosive ventilator - Google Patents

Abstract

The utility model relates to a comprehensive tester for a safety anti-explosive ventilator, which belongs to a comprehensive tester used in coal mines. The comprehensive tester comprises a host machine and two accessory cases, wherein the host machine comprises a host machine case and a panel. A liquid crystal display device with a big screen, a keyboard, a socket of an air velocity transducer, a USB socket and signal sockets for power, negative pressure, atmospheric pressure, humiture, motor rotational speed, etc. are fixed on the panel. A mainboard, a power panel, an alternating current transformer and a power sensor are arranged in the host machine case. The utility model has the advantages of security, integrity and reliability; according to the safety anti-explosive requirement, each component is designed; the utility model adopts signal transducers fully and tests the detection of the combination property of a ventilator; the utility model adopts the air velocity transducer in a three-cup type, and because the air velocity transducer in a three-cup type is little influenced by moisture and ventilation dust and is easy to clean, the utility model has high reliability, stability and precision for test. In addition, the utility model can satisfy the requirements of the safe checking and testing specification of a main ventilator system used in coal mines.

Description

Intrinsic safe explosion-proof type ventilation blower comprehensive tester

Technical field

The utility model relates to the tester that use in a kind of colliery, particularly a kind of intrinsic safe explosion-proof type ventilation blower comprehensive tester.

Background technology

At present, main fan is used very extensive as the colliery giant mechanical and electrical equipment, and its runnability is directly connected to the safety of the safety in production in colliery and people's lives and properties.Whether the purpose of ventilation equipment technical testing is to obtain its actual service performance, good with check ventilation equipment performance.

Existing ventilation blower testing tool major part can only be surveyed the individual event parameter of ventilation blower, as wind speed and wind tester, blast tester, power measuring etc.Even comprehensive tester also just can satisfy wind speed, air quantity, blast, the test of power entry purpose of blower fan, but these parameters are for the analysis-by-synthesis and the calculating of fan performance, the judge of combination property also is nowhere near, can not store test parameter, can not draw its operation curve according to the different operating conditions of ventilation blower.And it surveys the method for wind speed, be that the differential pressure signal that utilizes pitot tube to obtain is connected to differential pressure transmitter and converts and obtain wind speed, many, the high humidity of dust in the wind of extracting out because of the coalmine ventilation machine is very easily blocked tuyere, the airduct of pitot tube, thereby its measuring accuracy is low, testing reliability, poor stability.The test section of main fan generally is located at the import or export of blower fan in addition, extracts out many except that dust in the wind, the high humidity, also contains inflammable, explosion hazard gases, and the various sensors and the coupling arrangement that are located in the air channel do not have explosion-proof performance.

Summary of the invention

The purpose of this utility model provides a kind ofly can test the ventilation blower combination property, and can store test parameter, draws the intrinsic safe explosion-proof type ventilation blower comprehensive tester of its operation curve according to the different operating conditions of ventilation blower.

The purpose of this utility model is achieved in that this comprehensive tester comprises a main frame, two accessory cases, and main frame comprises: mainframe box, panel; Be fixed with on the panel: signal plugs such as the socket of large-size screen monitors LCD, keyboard, air velocity transducer, USB socket, power, negative pressure, atmospheric pressure, humiture, motor speed; Be equipped with in the mainframe box: mainboard, power panel, AC transformer, power sensor; In two accessory cases, have hardhead sponge to support in the accessory case, hardhead sponge has sensor deck and stube cable storehouse on supporting, and three cup type air velocity transducers are housed in the sensor deck, is placed with stube cable in the stube cable storehouse; Be equipped with in the another one accessory case: humiture, atmospheric pressure, negative pressure transducer, two pincerlike current sensors, speed probe and interconnecting devices, various stube cable, test accessories.

The counting port of mainboard is connected with the motor speed transducing signal with air velocity transducer every shaping circuit through light; Blower fan negative pressure, humiture, ambient atmosphere pressure, power of motor sensor are connected with the A/D input end of mainboard respectively.

The alternating current 220V power supply is after the transformer conversion, through the power panel rectifying and wave-filtering, common property is given birth to five groups of dc output powers, and wherein one group is intrinsic safety electric source, intrinsic safety electric source is connected with photoelectric isolating circuit, and photoelectric isolating circuit is connected with air velocity transducer with interconnecting device through the wind speed stube cable; Four groups of power supplys are connected with mainboard, signal converter and sensor socket respectively in addition.

Beneficial effect: owing to adopt such scheme, three cup type air velocity transducers and motor speed transducing signal enter mainboard counting port through light every shaping circuit; Realization is to the collection of blower fan wind speed, motor speed signal; Blower fan negative pressure, humiture, ambient atmosphere pressure, power of motor sensor produce 4～20mA signal respectively, after the sampling conversion, form the A/D input end that 1～5V direct current signal is connected to mainboard, realize the collection to above-mentioned signal.In conjunction with the on-the-spot actual parameter of input, as wind cave area, pressure measurement cross-sectional area, electric efficiency etc., adjust the operating condition of blower fan, and gather various sensor signals with the utility model, test the parameter such as wind speed air quantity, humiture, negative pressure, atmospheric pressure, power of motor, motor speed, blower fan total pressure efficiency, static pressure efficiency of ventilation blower under the different operating modes, and by USB socket connection computing machine or printer, draw out the operation curve of the different operating conditions of ventilation blower, realize the test of ventilation blower combination property and provide evaluation.

Jumbo electrization protection memory is installed on mainboard, can stores the test parameter of 80 typhoon machines, power down is not lost.Test event, process, the full menu in Chinese prompting of result generate test report automatically, have reached the purpose of this utility model.

This comprehensive tester has following advantage: (1) security: the material type selecting from the design of intrinsically safe circuit power supply, stube cable, boxcar, air velocity transducer, guaranteed the intrinsic safe explosion-proof requirement, and conformity certificate of protection is numbered: CNEx05707; (2) comprehensive: as to select for use signal transducer comprehensive, make the various performance parameters of ventilation blower all can obtain gathering, test, analyze, handle, realize the mensuration of blower fan combination property; (3) reliability: select three cup type air velocity transducers for use,, and be easy to clean because its dust that ventilated, humidity effect are little; Owing to there is hardhead sponge to support, three cup type air velocity transducers are formed excellent protection, make three cup type wind sensors can keep serviceability and precision for a long time, thus the utility model testing reliability, stable high, the precision height; (4) can satisfy " inspection specification is being detected with the main fan security of system in the colliery " requirement of the up-to-date promulgation of national security production supervision management board, standard No.: AQ1011-2005.

Description of drawings

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

Fig. 2 is the utility model mounted inside synoptic diagram.

Fig. 3 is the utility model air velocity transducer accessory case synoptic diagram.

Fig. 4-1 is a partial circuit schematic diagram of the present utility model.

Fig. 4-2 is a partial circuit schematic diagram of the present utility model.

Embodiment

Embodiment 1: the utility model comprises: mainframe box 1, panel 2.Mainboard 23, power panel 24, AC transformer 21, power sensor 22 are fixed in the mainframe box 1; Be fixed with each sensor signal socket 3, air velocity transducer socket 4, supply socket 5, USB interface 6, power switch 7, finger-board 8,240 * 128 dot matrix large-size screen monitors LCD 9 on the panel 2.

This comprehensive tester comprises a main frame, two accessory cases, and main frame comprises: mainframe box 1, panel 2; Be fixed with on the panel 2: signal plugs 3 such as the socket 4 of 240 * 128 dot matrix large-size screen monitors LCD 9, keyboard 8, air velocity transducer, USB socket 6, power, negative pressure, atmospheric pressure, humiture, motor speed; Be equipped with in the mainframe box 1: mainboard 23, power panel 24, AC transformer 21, power sensor 22; In two accessory cases, there is hardhead sponge to support 35 in one of them accessory case, hardhead sponge supports on 35 sensor deck 34 and stube cable storehouse 33,16 three cup type air velocity transducers 32 are housed in sensor deck 34, in stube cable storehouse 33, be placed with stube cable, owing to there is hardhead sponge to support, three cup type air velocity transducers are formed excellent protection, make three cup type wind sensors can keep serviceability and precision for a long time; Be equipped with in another accessory case: humiture, atmospheric pressure, negative pressure transducer, two pincerlike current sensors, speed probe and interconnecting devices, various stube cable, test accessories.

The counting port of mainboard is connected with the motor speed transducing signal with air velocity transducer every shaping circuit through light; Blower fan negative pressure, humiture, ambient atmosphere pressure, power of motor sensor are connected with the A/D input end of mainboard respectively.

The alternating current 220V power supply is after the transformer conversion, through the power panel rectifying and wave-filtering, common property is given birth to five groups of dc output powers, and wherein one group is intrinsic safety electric source, intrinsic safety electric source is connected with photoelectric isolating circuit, and photoelectric isolating circuit is connected with air velocity transducer with interconnecting device through the wind speed stube cable.Four groups of power supplys are connected with mainboard, signal converter and sensor socket respectively in addition.

Among Fig. 4-1 and Fig. 4-2, after line end A, the B among two figure, C, D, the corresponding connection of E, F, promptly become complete circuit theory diagrams.U2 is FT245BM, and the USB interface chip is finished data communication; U3 is CPU 80C552; U4 is 74HC245, improves the bus driver ability; U5 is the multiplexing function that 74HC573 finishes address, data line; U6 is the 27C256B memory under program; U7 is 74HC138, finishes address decoding and sheet selects work; U8 is electrified data memory; U9 is the MAX708 chip that resets; U10 is 74HC14, realizes the filter shape of wind speed pulse, motor speed pulse, receives the CPU counting end afterwards; U11, U12 are 74HC573, finish key assignments identification and decoding.U11A, U12A, U13A, U14A are four photoisolator TP521-4, realize that the photoelectricity of 16 tunnel three cup type air velocity transducer signals is isolated; The wind speed pulse of 16 tunnel three cup type air velocity transducers after photoelectricity is isolated is selected a multi-way switch through U13CD4067 16, is connected to the counting end of CPU.16 transportation work style speed sensors insert interconnecting device respectively, be connected to mainframe box air velocity transducer socket through one 20 core stube cable afterwards, be no more than 100 meters from air velocity transducer to instrument host case length overall, be the intrinsic safety electric source power supply from 16 tunnel three cup type air velocity transducers to main frame light every input circuit, press the intrinsically safe circuit design.Select also can both satisfy requirement of explosion proof in the material of the interconnecting device of surveying the wind scene and air velocity transducer.Temperature, humidity sensor are directly selected the explosion-proof type transmitter for use, and instrument host is placed on harbor, thereby can satisfy the intrinsic safe explosion-proof requirement; 240 * 128 Dot-matrix Graphic LCD are adopted in demonstration of the present utility model, adopt direct control mode, and promptly its data line read/write control line directly is connected with the homologous lines of CPU, full menu in Chinese prompting.

Power test is to use active power sensor (two watts of methods), joins two pincerlike current sensors and one three core voltage stube cable is realized.The power of power sensor is output as 4～20mA signal, except that wind speed, motor speed are the pulse signal T0 that receives CPU respectively, T1 counting end, other sensor: sensors such as power, humiture, negative pressure, atmospheric pressure are all exported 4～20mA signal, are connected to the A/D end of CPU so that gather and handle through converting 1～5V signal to.

Claims (2)

1, a kind of intrinsic safe explosion-proof type ventilation blower comprehensive tester, it is characterized in that: this comprehensive tester comprises a main frame, two accessory cases, and main frame comprises: mainframe box, panel; Be fixed with on the panel: signal plugs such as the socket of large-size screen monitors LCD, keyboard, air velocity transducer, USB socket, power, negative pressure, atmospheric pressure, humiture, motor speed; Be equipped with in the mainframe box: mainboard, power panel, AC transformer, power sensor; In two accessory cases, have hardhead sponge to support in the accessory case, hardhead sponge has sensor deck and stube cable storehouse on supporting, and three cup type air velocity transducers are housed in the sensor deck, is placed with stube cable in the stube cable storehouse; Be equipped with in the another one accessory case: humiture, atmospheric pressure, negative pressure transducer, two pincerlike current sensors, speed probe and interconnecting devices, various stube cable, test accessories.

2, intrinsic safe explosion-proof type ventilation blower comprehensive tester according to claim 1, it is characterized in that: the counting port of mainboard is connected with the motor speed transducing signal with air velocity transducer every shaping circuit through light; Blower fan negative pressure, humiture, ambient atmosphere pressure, power of motor sensor are connected with the A/D input end of mainboard respectively;

The alternating current 220V power supply is after the transformer conversion, through the power panel rectifying and wave-filtering, common property is given birth to five groups of dc output powers, and wherein one group is intrinsic safety electric source, intrinsic safety electric source is connected with photoelectric isolating circuit, and photoelectric isolating circuit is connected with air velocity transducer with interconnecting device through the wind speed stube cable; Four groups of power supplys are connected with mainboard, signal converter and sensor socket respectively in addition.

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