CN201075100Y

CN201075100Y - Program controlled analog sand-dust test device

Info

Publication number: CN201075100Y
Application number: CNU2007200410764U
Authority: CN
Inventors: 顾竞; 顾俊坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-29
Filing date: 2007-07-29
Publication date: 2008-06-18
Anticipated expiration: 2017-07-29

Abstract

The utility model provides a program control simulation dust testing device, which solves the technical problems in prior art that dust inlet pipeline is easy to be blocked and test is unstable. A centrifugal fan is arranged at the infall between a dust input duct and a dust recovery duct of a testing box; the air outlet of the centrifugal fan is communicated with the dust input duct; the air inlet is communicated with the dust recovery duct; the overlapping of the dust input duct and the dust recovery duct is prevented, thus preventing the blocking of dust inlet pipeline and ensuring stable test operation.

Description

Program control simulation sand and dust test device

(1) technical field:

The utility model relates to the environmental test equipment of product, relates in particular to the sand and dust environmental test equipment of product.

(2) background technology:

Many products that place field work require by the test of sand and dust environmental reliability, and there is the relevant art standard in country, and technical conditions, the simulated test facility of test are made respective specified.Have simulation sand and dust test schematic representation of apparatus now as shown in Figure 5: tested product and place simulation sand dust test chamber 1, motor 4 drives blower fan 3 sand and dust is kicked up, carry air channel 6 via inlet duct 2 and sand and dust, enter in the simulation test case 1, to being installed on the quilt test product sand on the bearing support.Sometimes in sand, also, apply a negative pressure of vacuum, improve testing requirements to product to by the logical pipeline that is connected with vacuum extractor of test product.Sand takes out product to technical standard order after the time, observes the husky amount of advancing in the product, and the test products changes of properties.See Fig. 5, the sand and dust that enter chamber 1 to the product sand after, the Hui Sha of whereabouts reclaims air channel 5 through sand and dust, flows out chamber 1 again, flow back into inlet duct 2.Because the blower fan 3 among Fig. 5 is the single flow blower fan, the direction of air intake and air-out is same direction of axis line, make that the inlet duct 2 of sand and dust is again the backward channel of Hui Sha, so cause pipeline 2 to be stopped up by sand and dust easily, the sand dust that flows into chamber 1 is few, inaccessible experimental technique standard-required, the simulation test instability.

(3) summary of the invention:

The sand and dust inlet duct stops up easily in the above-mentioned prior art in order to solve, the unsettled technical matters of sand and dust simulation test, and the applicant provides the simulation sand and dust test device of another kind of structure, and it can solve the problems of the technologies described above.

The technical solution of the utility model is as follows: it comprises the simulation sand dust test chamber, device is by the support of test specimen in the simulation sand dust test chamber, the input air channel of one side device sand and dust of simulation sand dust test chamber, the outlet of simulation sand dust test chamber is the recovery air channel of sand and dust, reclaim the infall device centrifugal blower in air channel in described sand and dust input air channel and sand and dust, the air inlet of centrifugal blower is connected with the recovery air channel of sand and dust, the air outlet of centrifugal blower is connected with sand and dust input air channel, and the line shaft of centrifugal blower is connected with variable-frequency motor by gearing; Describedly installed air extraction connector on the support of test specimen, air extraction connector is connected with vacuum extractor by pipeline; Device is communicated with the pipeline section of atmosphere on the described input air channel, and the sand and dust filtrator is installed on the pipeline section; Described air extraction connector also can be connected with vacuum extractor by the sand and dust filtrator; Perhaps air extraction connector is connected with vacuum extractor by sand and dust filtrator and gas meter successively, and gas meter is connected in parallel by the gas meter of 2 different ranges constitutes at least, and each flowermeter has gas flow regulating valve.Air extraction connector can also be connected by the end of pipeline with U-shaped pressure reduction pipe, and the other end of U-shaped pressure reduction pipe leads to atmosphere.

Owing to use centrifugal fan in the utility model, its air outlet is the delivery outlet of sand and dust, its air inlet is for reclaiming the inlet port of sand and dust, the recovery sand and dust do not overlap with the sand and dust that husky passage is advanced in the input chamber, avoid taking place the phenomenon of sand and dust blocking pipe fully, the capacity that guarantees sand dust is supplied with, and ensures stable the carrying out of sand and dust simulation test.

(4) description of drawings:

Fig. 1 is a main TV structure synoptic diagram of the present utility model, broken section among the figure;

Fig. 2 is a left TV structure synoptic diagram of the present utility model, broken section among the figure;

Fig. 3 is the utility model vacuum extractor structural drawing, presses the right apparent direction of Fig. 1;

Fig. 4 is the schematic top plan view of flowmeter among Fig. 3;

Fig. 5 is the structural representation of existing simulation sand dust test chamber.

(5) embodiment:

See Fig. 1, Fig. 2, device is simulated the input air channel 14 of side device sand and dust of sand dust test chamber by the support 18 of testpieces in the simulation sand dust test chamber 8, and the outlet 27 of simulation sand dust test chamber 8 is the recovery air channel of sand and dust, 7 is Vib. among Fig. 1, shakes to fall to amassing sand and dust on conduit wall.Reclaim the crossing 5 device centrifugal blowers 6 in air channel with sand and dust in sand and dust input air channel 14, the air inlet of centrifugal blower 6 reclaims air channel 27 with sand and dust and is connected, and the air outlet of centrifugal blower 6 is connected with sand and dust input air channel 14.See Fig. 1, the line shaft of centrifugal blower is connected with variable-frequency motor 1 by

belt pulley

3 and 2, adopts variable-frequency motor can make the sand dust of motor speed or input adopt programmed control, and 4 is the sand and dust gland bonnet among Fig. 1.See Fig. 2 and Fig. 3, by device air extraction connector 16 on the testpieces support 18, air extraction connector 16 is connected with vacuum extractor by pipeline, and air extraction connector 16 is connected with seal for pipe joints with quilt test product, gives by the test product to add a negative pressure raising testing requirements.Vacuum pumping pump 22 is the critical piece of vacuum extractor among Fig. 3,23 is vacuum-pumping pipeline, and 24 is reduction valve, and described vacuum extractor adopts prior art, air extraction connector 16 also is shown among Fig. 3 is connected with vacuum extractor, prevent that the sand and dust in the chamber from entering in the vacuum extractor by filtrator 26.

See Fig. 1, Fig. 3, Fig. 4, air extraction connector 16 can also be connected with vacuum extractor by filtrator 26 and flowmeter 10-13, four flowmeter 10-13 are connected in parallel, flow control valve is all arranged on every flowmeter, 25 is the variable valve of peak flow meter 13 among Fig. 3, and the variable valve of all the other flowmeters is installed in an end of flowmeter.Install the flowmeter of a plurality of different ranges, purpose is to be fit to different sizes and is tested the needs that product applies different negative pressure, and flowmeter is mainly measured the flow that deflates when vacuumizing.See Fig. 1, Fig. 3, air extraction connector 16 also is tightly connected by an end of pipeline and liquid U-shaped pressure reduction pipe, and the other end of U-shaped pressure reduction pipe communicates with atmosphere, measures to give by U-shaped pressure reduction pipe 9 and is tested the negative pressure value that applies when product vacuumizes.U-shaped pressure reduction pipe and flowmeter all adopt the commercial goods.

See Fig. 2, the logical atmosphere pipeline section of device on sand and dust input air channel 14, so keeping in the casing also is an atmospheric pressure, preventing becomes negative pressure in the chamber when air extraction connector 16 gas leakage, reduce the test degree of accuracy or damage casing.Serial connection filtrator 15 on logical atmosphere pipeline section prevents that the outside dust from entering chamber, influences test accuracy.Among Fig. 2,17 is instrument connection, and to by the test product when testing, circuit passes this hole in the test; 19 is the outlet grid that sandblasts; 20 are the door of

chamber

8, and 21 are the dust blowing device.

The utility model to the sand dust of the rotating speed of variable-frequency motor or input chamber, to different by the test added negative pressure of vacuum values of product and vacuumize flow etc., all adopt existing program control technology, whole process to the simulation sand and dust test is carried out programming Control, and programme control circut does not draw in the accompanying drawing.

Claims

1. program control simulation sand and dust test device, comprise the simulation sand dust test chamber, device is by the support of test specimen in the simulation sand dust test chamber, the input air channel of one side device sand and dust of simulation sand dust test chamber, the outlet of simulation sand dust test chamber is the recovery air channel of sand and dust, be characterised in that in described sand and dust input air channel and sand and dust and reclaim the infall device centrifugal blower in air channel, the air inlet of centrifugal blower is connected with the recovery air channel of sand and dust, the air outlet of centrifugal blower is connected with sand and dust input air channel, and the line shaft of centrifugal blower is connected with variable-frequency motor by gearing; Describedly installed air extraction connector on the support of test specimen, air extraction connector is connected with vacuum extractor by pipeline.

2. by the described program control simulation sand and dust test device of claim 1, be characterised in that the pipeline section of device connection atmosphere on the described input air channel, the sand and dust filtrator is installed on the described pipeline section.

3. by the described program control simulation sand and dust test device of claim 1, be characterised in that described air extraction connector is connected with vacuum extractor by the sand and dust filtrator.

4. by claim 1 or 3 described program control simulation sand and dust test devices, it is characterized in that described air extraction connector is connected with vacuum extractor by sand and dust filtrator and gas meter successively.

5. by the described program control simulation sand and dust test device of claim 4, it is characterized in that described gas meter is connected in parallel by the gas meter of 2 different ranges at least to constitute, each flowermeter has gas flow regulating valve.

6. by the described program control simulation sand and dust test device of claim 1, it is characterized in that described air extraction connector also is connected by the end of pipeline with U-shaped pressure reduction pipe, the other end of U-shaped pressure reduction pipe leads to atmosphere.