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MT 160-1987: Dust filtering fan type safety helmet - General technical conditions
Status: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| MT 160-1987 | English | 279 |
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Dust filtering fan type safety helmet - General technical conditions
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MT 160-1987
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PDF similar to MT 160-1987
Standard similar to MT 160-1987 GB 811 GB 2626 DL/T 320 MT/T 161 Basic data | Standard ID | MT 160-1987 (MT160-1987) | | Description (Translated English) | Dust filtering fan type safety helmet - General technical conditions | | Sector / Industry | Coal Industry Standard | | Classification of Chinese Standard | C73 | | Word Count Estimation | 7,770 | | Date of Issue | 9/30/1987 | | Date of Implementation | 11/1/1987 | | Regulation (derived from) | Development-Reform-Office-Industry (2006) 97 | | Summary | This standard applies to dust environment to prevent workers pneumoconiosis hazards wear helmets and dust blowing dust (hereinafter referred to as the dust cap). | MT16: ---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Dust filtering fan type safety helmet-General technical conditions
Ministry of Coal Industry Standards
MT/T 160-87
Dust filtering air supply dustproof helmet
General technical conditions
Published 1987-09-30
1987-11-01 implemented
Published by the Ministry of Coal Industry of the People's Republic of China
Contents
1 Technical requirements 1
2 Test method 1
3 Inspection rules 3
4 Marking, packaging, transport and storage 3
Dust filtering air supply dustproof helmet
General technical conditions
This standard applies to dust-filtered air-supply dust-proof helmets (hereinafter referred to as dust-proof hats) worn by workers in dusty environments to prevent pneumoconiosis.
1 Technical requirements
1.1 Dust caps shall comply with the provisions of this standard and shall be manufactured in accordance with the drawings and documents approved by the prescribed procedures.
1.2 It can work normally under the condition of temperature 0 ~ 40 ℃ and relative humidity not more than 95%.
1.3 When used in coal mines and explosive environments, it should meet GB 3836.1-83 "General requirements for explosion-proof electrical equipment for explosive environments" and
Relevant provisions of GB 3836.4-83 "intrinsically safe circuits and electrical equipment" i "for explosion-proof electrical equipment for explosive environments".
1.4 The surface should be smooth, no flash, no obvious scratches and dents, no peeling of surface coating and plating, and no loosening of parts.
1.5 The dust blocking rate should be greater than 99%.
1.6 Air supply.
1.6.1 The initial supply air volume is specified by the product standard.
1.6.2 After 6 hours of continuous working time, the purified air supply volume should not be lower than 120L/min.
1.7 The design of helmets and face shields for dust caps should be based on GB 2428-81 "China Adult Head Shape Series".
Adjust within 510 ~ 640mm.
1.8 The weight of the dust cap on the head must not be greater than 1.2kg.
1.9 The head protection performance of the dust cap should meet the requirements in Chapter 3 of GB 2811-81 "Safety Helmet".
1.10 The mask of the dust cap should not pass the face protection test.
1.11 The light transmittance of the mask of the dust cap must not be less than 85%.
1.12 The total field of view shall not be less than 75%, and the lower field of view shall not be less than 40 °.
1.13 The noise must not be greater than 70dB (A).
1.14 The continuous use time of the battery shall not be less than 6h. If a miner's lamp is used as a power source, in addition to the energy consumption of the dust cap, the technical performance of the miner's lamp standard shall be met.
1.15 After the impact test, it should be able to work normally.
1.16 The dust caps packaged according to the factory requirements should be able to work normally after transportation test.
2 Test method
2.1 Environmental test
2.1.1 General requirements
During environmental tests, the dust caps are not packed and are in a non-working state.
2.1.2 Low temperature test
The low temperature test is carried out in accordance with the provisions of GB 2423.1-81 "Electrical and Electronic Products Basic Environmental Test Procedure Test A. Low Temperature Test Method", where
a. Test method. Test Ab --- temperature gradient;
b. Test temperature. select 0 ℃;
c. Test time. select 2h.
2.1.3 High temperature test
The high temperature test is carried out in accordance with the provisions of GB 2423.2-81 "Electrical and Electronic Products Basic Environmental Test Procedure Test B. High Temperature Test Method", where
a. Test method. Test Bb --- temperature gradient;
b. Test temperature. select 40 ℃;
c. Test time. select 2h.
2.1.4 Damp heat test
The moist heat test is conducted in accordance with the provisions of GB 2423.4-81 "Basic Environmental Test Procedure Test for Electrical and Electronic Products Db. Alternating Moist Heat Test Method", of which.
a. High temperature. select 40 ℃;
b. Test period. select 6 days.
After the test, it is restored for 2 hours under normal atmospheric conditions, in accordance with the relevant provisions of GB 998-82 "Basic Test Methods for Low Voltage Electrical Apparatus"
Perform insulation resistance measurement and withstand voltage test.
2.2 Appearance
Check visually.
2.3 Determination of dust resistance and air supply
2.3.1 Test conditions
a. Dust wind tunnel. The wind speed range of the test section is 0.5 ~ 4m/s, and the relative standard deviation of the wind speed uniformity in the wind tunnel flow field is not more than 5%.
At a concentration of 100mg/m3, the relative standard deviation of the uniformity of dust concentration in the cross section of the wind tunnel is not greater than 5%;
b. Standard head type. use any of head sizes 1, 4, 7, 10 and 13 in GB 2428-81;
c. Dust sampler. dust sampler with flow rate greater than 20L/min;
d. Anemometer. measurement error is not greater than 2%;
e. Dust. talc, more than 90% of the particle size is less than 5μm (of which more than 70% is less than 2μm).
2.3.2 Procedure for measuring dust resistance
Put the dust cap on the standard head type, put it in the dust wind tunnel test section, and make it work, at the dust cap air inlet and the standard head type mouth
Samples are taken at the outlet of the nasal ventilation pipe simultaneously with a sampler, the sampling time is not less than 10min, and the dust resistance rate is calculated according to formula (1).
2.3.3 Determination of initial air supply
Put the dust cap on the standard head shape, make the dust cap work normally, measure the average wind speed, and calculate the initial air supply according to formula (2).
2.3.4 Measurement of purification air supply for 6h continuous working time
In the dust wind tunnel test section, make the dust cap worn on the standard head type work, and record its working time. When it reaches 6h, measure the average
Wind speed (Caution. Do not let dust off the filter). The calculation method of purifying air supply volume during continuous working time is the same as that in 2.3.3.
2.4 Test of head protection performance
The test of head protection performance is performed in accordance with GB 2812-81 "Test Method for Safety Helmets", but when performing immersion treatment, the fan and filter should be taken out.
2.5 Impact test
The impact test is performed in accordance with the provisions of Chapter 2 of GB 2812-81.
2.6 Face protection performance test
Put the dust cap on the standard head shape, fasten the headband, and lie on the wooden base to keep stable. Put a 50g steel ball from 1m high
Fall freely and impact the middle of the mask once.
2.7 Determination of transmittance
The light transmittance of the dust cap mask is measured in accordance with the relevant provisions of GB 2410-80 "Test Method for Light Transmittance and Haze of Transparent Plastics".
2.8 Measurement of visual field
The field of view of the dust cap is performed in accordance with the provisions of GB 2891.4-82 "Test Methods for the Field of View of Filtering Gas Masks".
2.9 Determination of noise
Put the dust cap on the standard head type to make it work normally. Use a microphone of type Ⅰ sound level meter to measure the noise 25cm away from the sound source of the dust cap.
2.10 Transport test
Fix the dust cap on the reinforced simulated automobile transportation test bench (simulating Jiefang brand truck ν = 35km/h, third-grade highway vibration conditions),
The test is carried out according to the requirements of.200km mileage.
3 Inspection rules
3.1 The dust cap shall be subjected to factory inspection and type test.
3.2 Factory inspection
3.2.1 The dust cap is inspected by the quality inspection department of the manufacturer. If the inspection is qualified, the certificate shall be issued before leaving the factory.
3.2.2 Each set of dust caps shall be inspected according to 1.4, 1.6.1 and 1.13 of this standard.
3.3 Type test
3.3.1 Type tests are carried out in accordance with all the technical requirements of this standard.
3.3.2 The dust cap must be type tested under the following conditions.
a. Trial production of new products;
b. continuous batch production, once a year;
c. When there are major changes in design, process and materials that affect product performance;
d. when changing production;
e. When production is stopped after one year of suspension.
3.3.3 Sampling method. Every 1000 ~ 3000 sets of dust caps are randomly selected, and the number is 8 sets.
4 Marking, packaging, transportation and storage
4.1 Signs
Each set of dust caps should have a nameplate and be fixed in a prominent position. The writing on the nameplate should be clear and durable. The nameplate should indicate the following.
a. factory name or factory logo;
b. product model and name;
c. main technical performance;
d. safety signs and explosion-proof certificate number;
e. factory number;
f. Date of manufacture.
4.2 Packaging
4.2.1 The outer wall of the product packaging box should be clearly marked with text and symbols, including.
a. factory name or factory logo;
b. product model and name;
c. signs to prevent shattering, rain and upside down;
d. overall dimensions and gross weight;
e. The date of manufacture.
4.2.2 Products can be packed in wooden boxes, cartons, etc.
4.2.3 The following documents should be attached to the box.
a. packing list;
b. product certification;
c. Product specifications.
4.3 Transport and storage
The warehouse where the dust caps are stored should be kept dry and well ventilated, and the products should be kept clean, dry and protected from direct sunlight. Product in transit
During storage and storage, it is forbidden to put together with acids, alkalis and other toxic and harmful substances.
Finished product packaging shall meet the relevant regulations of railway and road transportation.
Additional information.
This standard is proposed and managed by the Chongqing Research Institute of Coal Science Research Institute.
This standard was drafted by the Chongqing Research Institute of Coal Science Research Institute.
The main drafters of this standard are Yu Tianzhong and Jiang Zhongru.
This standard is entrusted to the Chongqing Research Institute of the Coal Research Institute for interpretation.
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