CN202382914U

CN202382914U - Waterproof and dust-proof lamp air tightness detecting device for LED (Light-Emitting Diode) road lamp

Info

Publication number: CN202382914U
Application number: CN201120521864XU
Authority: CN
Inventors: 黄军垒
Original assignee: ZHENGZHOU SPACEME CO Ltd
Current assignee: ZHENGZHOU SPACEME CO Ltd
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2012-08-15
Anticipated expiration: 2021-12-14

Abstract

The utility model discloses a waterproof and dust-proof lamp air tightness detecting device for an LED (Light-Emitting Diode) road lamp. The waterproof and dust-proof lamp air tightness detecting device for the LED road lamp comprises an air source, a detecting system and a control system, wherein the detecting system comprises four electromagnetic valves, two air control valves, a filtering reducing valve and a direct pressure sensor; a differential pressure sensor is connected in parallel between a pipeline II and a pipeline III; the end head of the pipeline II is provided with an interface used for communicating with a measured member; and the end part of a pipeline III is provided with an interface used for communicating a standard member. The waterproof and dust-proof lamp air tightness detecting device for the LED road lamp finishes a transformation from qualitative judgment to quantitative judgment, realizes the transformation from sampling detection to online detection and realizes high-precision leakage measurement within a short time. The waterproof and dust-proof lamp air tightness detecting device for the LED road lamp, disclosed by the utility model, has the advantages of making out quantitative judgment on enclosure protective level of the LED road lamp, effectively improving automatic detection level of the enclosure protective level of the LED road lamp, lightening labor intensity, improving production efficiency and perfecting product production structure.

Description

A kind of LED street lamp water proof and dust proof light fixture air-tightness detection device

Technical field

The utility model belongs to the detection technique field, is specifically related to a kind of LED street lamp water proof and dust proof light fixture air-tightness detection device.

Background technology

In recent years, the LED Lighting Industry developed rapidly, and system deployment is carried out from strategic height one after another in countries and regions such as the U.S., Europe.The LED illumination has become global chance, but the development of LED illumination simultaneously also begins to face global challenge.LED illumination development exists checkout equipment, detection method and standard formulation work can not adapt to the fast-developing drawback that requires of industry.Because the environment for use of LED street lamp is very abominable, places under the open-air atmosphere, and its protection is seemed particularly important throughout the year.In order to protect the LED street lamp, come waterproof and dustproof with regard to needing airtight light fixture.According to the regulation of " LED street lamp testing standard and test method ", the degree of protection of LED streetlamp housing need IP66 or more than.According to the detection method of " GB4208-1993 shell protection grade (IP code) " regulation, the anti-dust performance of LED road lamp is adopted talcum powder to detect, the water resistance of light fixture is adopted traditional swing pipe device of drenching with rain.This installs simulating natural environment, adopts spray rainwater mode to test at official hour, after the completion to be tested, opens light fixture, through whether leaking in the eye-observation light fixture, and then judges the leakproofness of street lamp.Mainly there is the deficiency of the following aspects in this device: 1, required time of test long, can't satisfy the industrialization demand; 2, the precision of test is not high, and its method through artificial observation is judged, can't make accurate judgement to the size of leakage rate, and there is the subjectivity factor of judgment in artificial observation itself; 3, be prone to light fixture is caused corrosion, shorten the life-span of light fixture, this is the common fault of water inspection; 4, can't guarantee all qualified products, because need the time of detection longer, so can only adopt the form of sampling observation; 5, also can't be used for on-line testing; In the process of 6, after opening light fixture, installing once more simultaneously, bring out secondary leakage easily.

The utility model content

The purpose of the utility model is to solve the above-mentioned technical matters that exists in the prior art, and a kind of LED street lamp water proof and dust proof light fixture air-tightness detection device is provided.

For realizing above-mentioned utility model purpose, the technical scheme that the utility model adopts is following:

The LED street lamp water proof and dust proof light fixture air-tightness detection device of the utility model; Comprise source of the gas, detection system and control system; Described detection system comprises four solenoid valves (solenoid valve I, solenoid valve II, solenoid valve III and solenoid valve IV), and the solenoid valve I connects sound suppressor after being connected in series vertical compression sensor and solenoid valve IV through the pipeline I; The solenoid valve II connects the Pneumatic valve I through the pipeline II; The solenoid valve III is through pipeline III serial connection Pneumatic valve II; After Pneumatic valve I and Pneumatic valve II between pipeline II and pipeline III and connect differential pressure pick-up; The termination of pipeline II is provided with the interface that is used to connect measured piece, and the termination of pipeline III is provided with the interface that is used to connect standard component, and solenoid valve II and solenoid valve III are communicated with the pipeline I respectively; Pneumatic valve I and Pneumatic valve II are communicated with the pipeline I respectively, and the output signal of vertical compression sensor, differential pressure pick-up is connected to control system.On the pipeline II, be provided with the temperature sensor I, the pipeline III is provided with the temperature sensor II, and temperature sensor I, temperature sensor II output signal are connected to control system.

The utility model adopts between standard component and measured piece and contrasts, and measures with the gas detection method.According to thermodynamic principles, for the ideal gas in the airtight container, if the temperature of gas does not change, the product of its pressure and volume is a constant.When the LED street lamp is detected; It is charged into pressure gas or employing vacuumizes mode; Make the air pressure in the LED street lamp chamber be higher than atmospheric pressure or form negative pressure, if the LED street lamp leaks, then its inner air pressure must descend or go up; Utilize the thermodynamics formula can release the gas volume of leakage and the relation of pressure drop, and can obtain leakage rate thus.According to the size of slip, detection level is divided into A, B, C, four grades of D, thereby LED street lamp water proof and dust proof grade is made judgement.

Detect requirement according to the object sealing property, the mode that this utility model adopts hardware to combine with software realizes Leak Detection.

At first, on control system, set testing required parameters such as related data, the parameter of basis setting in advance starts executive component then, begins standard component and measured piece are inflated simultaneously, and after inflationtime finished, system got into the balance and stability stage.After reaching the balance required time, get into detection-phase, read the differential pressure pressure signal by differential pressure pick-up.Open vent valve after detection-phase finishes the detected gas in measured workpiece and the standard component is discharged, the one whole testing process finishes like this, and system prepares to detect next time.And deliver to control system after the pressure signal process instrument amplifier conditioning amplification by the differential pressure pick-up detection; Control system is changed the simulating signal of input; Conversion is after analyzing and processing judges whether the impermeability of measured workpiece is qualified; Data after the processing can be exported and show and print, also can through serial port communicate by letter with host computer in case in the future to data add up, inquiry and analyzing and processing.Control system in the utility model realizes through single-chip microcomputer.

The pressure limit that the utility model can detect is between-0.1～5.0MPa; The adaptable environment temperature of institute is between-40oC～85oC; The air temperature ranges of institute's energy measurement is between-55oC～100oC; The light fixture that can satisfy the LED street lamp that under various natural environmental conditions, uses detects, and has avoided spray rain formula to detect the corrosion that is caused simultaneously.Can be different according to the test class requirement, class parameter is set, the rank of LED streetlamp housing is differentiated, evaluated; Adopt giant-screen LCD display mode, show actual pressure variation, pressure change rate and degree of protection, the test case that can observe road lamp to be detected intuitively; Have qualified and defective alarm, can pick middle specification product rapidly, make the mass production of product, detection become possibility; Testing result report printing function is arranged, can carry out gathering of qualification rate, carry out the analysis of system measured object; Detect data storing and query function; Have communication function, be convenient to the network management of many testing apparatuss.

The utility model is accomplished from qualitatively judging the transformation of quantitative judgement, and realization to online detection, realizes the high precision leakage measuring instrumentation from sampling Detection at short notice.LED street lamp shell protection grade is made quantitative judgement, can effectively improve LED street lamp shell protection grade robotization detection level, reduce labor intensity, enhance productivity, improve the production structure; The employing impermeability detects, and avoids shell is caused corrosion; The device occupied ground is little, need not relevant auxiliary facility, for the detection of similar products provides new approach.

Description of drawings

Fig. 1 is the schematic diagram of gas circuit of the utility model.

Fig. 2 is the system hardware theory diagram of the utility model.

Embodiment

The LED street lamp water proof and dust proof light fixture air-tightness detection device of the utility model; Comprise source of the gas, detection system and control system; Described detection system comprises four solenoid valves (solenoid valve I 2, solenoid valve II 5, solenoid valve III 6 and solenoid valve IV), and solenoid valve I 2 connects sound suppressor 13 after being connected in series vertical compression sensors 3 and solenoid valve IV 4 through pipeline I 14; Solenoid valve II 5 connects Pneumatic valve I 7 through pipeline II 15; Solenoid valve III 6 is through pipeline III 16 serial connection Pneumatic valve II 8; After Pneumatic valve I 7 and Pneumatic valve II 8 between pipeline II 15 and pipeline III 16 and connect differential pressure pick-up 9; The termination of pipeline II 15 is provided with the interface that is used to connect measured piece; The termination of pipeline III 16 is provided with the interface that is used to connect standard component; Solenoid valve II 5 is communicated with pipeline I 14 respectively with solenoid valve III 6, and Pneumatic valve I 7 is communicated with pipeline I 14 respectively with Pneumatic valve II 8, and the output signal of vertical compression sensor 3, differential pressure pick-up 9 is connected to control system respectively.On the pipeline II, be provided with temperature sensor I 10, temperature sensor I 10 outputs signal to control system.

Solenoid valve II 5 connects Pneumatic valve I 7 through pipeline II 15; Solenoid valve III 6 is through pipeline III 16 serial connection Pneumatic valve II 8; Between pipeline II 15 and pipeline III 16 and connect differential pressure pick-up 9, the termination of pipeline II 15 is provided with the interface that is used to connect measured piece after Pneumatic valve I 7 and Pneumatic valve II 8.The termination of pipeline III 16 is provided with the interface that is used to connect standard component, on the pipeline III, is provided with temperature sensor II 11, and temperature sensor II 11 outputs signal to control system.

Solenoid valve II 5 is communicated with pipeline I 14 respectively with solenoid valve III 6, and Pneumatic valve I 7 is communicated with pipeline I 14 respectively with Pneumatic valve II 8, and the output signal of vertical compression sensor, differential pressure pick-up is connected to control system respectively.

The pneumatic diagram of the utility model is divided into inflation, balance, measurement and exhaust four-stage, and the duty of each solenoid valve is following under each state:

1, aeration phase: source of the gas 12 forms steady air flow through filtrator 1; Solenoid valve I 2 is opened, and solenoid valve II 5 and solenoid valve III 6 control Pneumatic valve I 7 and Pneumatic valve II 8 make it be in open mode; Solenoid valve IV 4 is closed, and makes gas get into measured piece and balance element simultaneously.

2, equilibrium stage: solenoid valve I 2 is closed with solenoid valve IV 4, and solenoid valve II 5 and solenoid valve III 6 control Pneumatic valve I 7 and Pneumatic valve II 8 make it be in open mode, and gas reaches sufficient balance in measured piece and balance element.

3, measuring phases: solenoid valve I 2 is closed with solenoid valve IV 4, and solenoid valve II 5 and solenoid valve III 6 control Pneumatic valve I 7 and Pneumatic valve II 8 make it be in closed condition, makes independently confined space of each self-forming of measured piece and balance element.If gas has leakage, then read pressure reduction through the differential pressure sensing.

4, exhaust phase: solenoid valve I 2 is closed, and solenoid valve II and solenoid valve III control Pneumatic valve I and Pneumatic valve II make it be in open mode, and the solenoid valve IV is opened, and gas is discharged gas through pipeline I exhausr port 13.

Claims

1. a LED street lamp water proof and dust proof light fixture air-tightness detection device comprises source of the gas, detection system and control system, and it is characterized in that: described detection system comprises four solenoid valves; Two Pneumatic valves, a filtering pressure reducing valve, a vertical compression sensor; Between pipeline II and pipeline III and connect differential pressure pick-up; The termination of pipeline II is provided with the interface that is used to connect measured piece, and the termination of pipeline III is provided with the interface that is used to connect standard component, and solenoid valve II and solenoid valve III are communicated with the pipeline I respectively; Pneumatic valve I and Pneumatic valve II are communicated with the pipeline I respectively, and the output signal of vertical compression sensor, differential pressure pick-up is connected to control system respectively.

2. LED street lamp water proof and dust proof light fixture air-tightness detection device according to claim 1; It is characterized in that: on the pipeline II, be provided with the temperature sensor I; On the pipeline III, be provided with the temperature sensor II, temperature sensor I, temperature sensor II output signal are connected to control system respectively.