This standard applies to working pressure 0.2 ~ 0.7MPa of various types of fire-fighting water gun. 1. the the nouns, terminology 1.1 multi-function (hereinafter referred to as water gun) consists of a single or double carries and operation of water as an extinguishing agent for Jet nozzle. Nozzles typically consists of interfaces, gun, valves and nozzles or can form a variety of forms of injection equipment. 1.2 full flow has enriched the core segment of water jet. 1.3 mist flow Jet edge angle greater than 00 and do not have a substantial core segment of water jet. 1.4 range water gun spray flow in intensive service center to loose nozzle outlet-Center on the surface of the projection point the straight-line distance between. 1.5 mist spray angle in the angle between the edge of the water flow.
1.6 equivalent nozzle diameter to table 1 DC traffic ratings and nominal working pressure, flow coefficient of 1 cases calculating the nozzle diameter of DC round values.
2. Type and performance parameter is of type water gun 2.1 following three basic types: DC gun: Jet full flow of water gun. Spray gun: spray mist flow water gun. DC spray gun: equip can spray water and spray mist flow water gun. 2.2 performance parameters nozzles property parameters are shown in table 1. Table
interface 1 nominal diameter mm equivalent diameter mm nozzle pressure, MPa flow, L/min range, m spray angle allowed operation n.m ratings range DC adjustable spray DC spray type non-adjustable type rating tolerance
50 13 0.35 0.20 ~ 0.70 200 ± 16 140 ~ 400 £ ¾ £ ¾ £ 22 11 0 ~ 140 extinguishing spray angle: 300 ~ 500 self-defence angle fog horn: 900-1200 "15 16 300 ± 24 210 ~ 600 £ ¾ £ ¾ £ 13 19 25 450 ± 36 315 ~ 900 £ ¾ £ ¾ £ 28 14 22 0.20 0.20 ~ 0.40 450 ± 36 315 ~ 900 20 £ ¾ £ ¾ £ 10 Note: Reed-type gun, rated working pressure for 0.5Mpa, performance parameters required reference on the table.
3. Performance requirements 3.1 material 3.1.1 water gun material itself should be corrosion-resistant performance of, or on materials for a variety resistant to corrosion. 3.1.2 the casting material and mechanical properties of the chemical at shall conform to GB 1173-optimized 74 the cast aluminum alloy, GB 1176-74 the casting copper alloy and GB 3069-82 the die-casting aluminum alloy "and the corresponding standards. 3.2 seals the caulking gun shall be equipped with seals. The use of o-ring shall conform to GB 1235?/FONT > 76 the rubber sealing o-ring 3.3 thread on thread except water gun and part of the tooth interface connection tube using cylindrical pipe thread are should be a common thread. General thread tolerances shall conform to GB 197-81 the common thread of tolerances and fits "internal thread and external thread 7H 8g level requirements. Threads should always teeth, the surface should be clean. 3.4 surface quality casting surface should have a scarred, cracks and holes. Aluminium surface Anodic oxidation processing should be made. The temperature of the water gun used 3.5 temperature range-30 ℃ ~ 55 ℃. By 4.3, 4.4 test conditions, the operation should work properly. 3.6 seal water gun in 0.9MPa pressure, press 4.7.2 and 4.7.3 conditions for water pressure tightness test. Gun and seal parts do not allow leaks. 3.7 strength under the pressure of the water gun, press 1.6MPa 4.7.4 conditions for water pressure strength test. Water gun should not break, does not affect the normal use of the residual deformation. 3.8 Jet performance within the scope of work pressure, water gun operations should be flexible and reliable. Rated working pressure of the injection parameters should meet the requirements in table 1 of the corresponding request. 3.9 anti-drop performance nozzles on outlying regional 1.5m height conditions provided by 4.6 for drop test, you should still be able to use normal operation. 3.10 corrosion gun conditions provided by 4.5 trial, should no layers, flake or visible pitting corrosion pits, action should be normal 3.11 interface performance in snap-on interface shall conform to GB 3265?/FONT > 82 of the deduction of fire within an interface type and basic parameters and GB 3265? > 82 the inner/FONT snap-on general technical requirements for fire protection interface. 4. test method 4.1 thread inspection with thread gauges or universal tool microscope to check water gun on the whole thread, check result shall conform to the requirements of 3.3. 4.2 appearance quality inspections head notes water gun appearance quality, appearance quality should meet 3.4 requirements. 4.3 resistant test 4.3.1 will squirt on electric oven at 55 ° c in the heat insulation 4h under, remove the check within half a minute after. Inspection results shall meet the requirements of 3.5. 4.3.2 electric oven should be consistent with ZB Y 149?/FONT > 83 the dryer technical conditions "specified requirements (temperature fluctuation ± 1 ° c, the temperature uniformity coefficient ±0 0.025). 4.4 low temperature resistance test 4.4.1 will wipe dry water gun low-temperature Chamber at-30 ° c under insulation 4h, remove half minutes check after. Check 3.10 requirements. 4.4.2 low-temperature chamber temperature fluctuations and temperature uniformity shall not exceed ± 3 ° c. 4.5 salt spray corrosion test test before the water gun 4.5.1 surface shall be carefully cleaned with greasy, dirt. When you are not allowed to use abrasive cleaning or solvents. Water gun in salt spray corrosion test chambers should uprightposition, water gun sound not one, water gun or contact with the box-wall. 4.5.2 test cycle for 96h. Test must prevent salt solutions impact water gun surface directly. Specimens from salty fog corrosion box at check out, the application does not exceed 38 ° c water washing, drying after inspection. Inspection results should meet 3.10 requirements. 4.5.3 salt spray corrosion test test conditions should satisfy the following requirements: salt solution 50 ± lg/L; 35 ℃ pH should be maintained at 6.5 ~ 7.2 range; salt sedimentation rate 1.0 ~ 2.0ml/h (in the horizontal collecting area 80cm2); test box valid test space temperature is 35 ± 2 ℃; the requirements of the test cycle shall be interrupted in the spray. 4.6 drop test to 4.6.1 water gun, jet nozzle up and down and the water gun axis is level (if there are any open and, on the level of the water gun and tussah axis below) three locations, from ground 1.5 ± 0.01m height (from the lowest point since the water gun) free fall to the hard cement ground. Water gun to each position crashed twice after inspection. Check result shall conform to 3.9 requirements. 4.6.2 cement ground for 300-level 10cm thick reinforced concrete slab. Layout suitably reinforced, 425, cement, coarse sand and crushed stone of 5 ~ 13mm to 1: the ratio of 2: 4. pour 4.7 tightness and strength test 4.7.1 test devices allow working pressure should be greater than 2MPa. Voltage ± 2%. Unit of pressure gauge-precision level not lower than class 1.5. 4.7.2 the switch valve closed water gun, gun inlet side of the interface and test device, and then on the water gun compression, compression process must exclude guns in the air, when the pressure gauge on the readings to achieve after holding 0.9MPa 2min, check result shall conform to 3.6 requirements. 4.7.3 open water gun of on-off valve, inlet side nozzles through interfaces and test device connected to the water of the dead letter squirt gun. Repeat the pressurization and 1.7.2 holding pressure process. Check result shall conform to 3.7 requirements. 4.8 Jet performance test 4.8.1 Jet performance test device allows working pressure 1MPa, should be not less than 2% voltage stabilizing precision. Equipment for pressure gauge-precision level not lower than class 1.5. 4.8.2 range and flow testing first water gun over Jet shelf, high speed good water gun axis and a horizontal line of the angle (angle)-3010, adjust the nozzle outlet-Center to floor height to 1 ± 0.01m. Requirements to the layout of the wind, the wind speed is less than the outside 3m/s. Measuring DC range, in front of the ground water gun, along with a range of direction assign a column sizes the same water containers, water container's layout in the range of the factory calibration of DC with a range of values between 0.7 ~ 1.3 times. Container Center distance to 0.5m. Start the pump and adjust the pressure of work, when the water gun inlet pressure reaches the set nominal working pressure values and Jet stability, continuous to water container direction injection half a minute, add water to the container up to the nozzle outlet Centre-Centre on the surface of the projection point the straight-line distance between, which is the measure of DC range. Measuring spray range, in front of the ground water gun, along with a range of direction assign three columns of water containers, water container layout range is the manufacturer of the spray range value calibration 0.7 ~ 1.3 times. Container Center distance 0.5m. Injection process and injection time determination of the range with DC. Compare all row three water container and add water. Nozzle outlet Centre in ground water projection point to add, and the largest of the row of container Center of straight-line distance is to test the range of spray. Flow value can be read from the meter. The spray angle adjustable spray nozzles that spray range in 300 spray angle determination. Range and flow measurement result shall conform to the corresponding in table 1. 4.8.3 spray angle measurements of the angular gauge respectively two edges with water gun nozzle spray before, you can overlap the edge of the measured and spray angle. Measurement result shall conform to the corresponding in table 1. 4.9 operating moment for the determination of the water gun over Jet performance test device, close the valve, the water gun gun compression to the maximum working pressure with three standard measurement operation handles dynamometer operation on the torque. Allows measurement error of ± 0.5N · m. 5. inspection rules 5.1 product type testing according to the provisions of this standard test method for full examination. 5.2 product inspection should meet this standard 3.4, 3.6, 3.7, 3.8 requirements. 5.3 test sampling methods and the results of the evaluation by GB 2828?/FONT > 81 the desk-to-batch check sampling procedures and tables "or check the cycle GB 282981 sampling procedures and tables for law enforcement. 6. the flag shall be firmly on the gun with the model, specification and factory name tags. Additional explanation: this standard by the Ministry of public security fire fight Science Graduate School in a centralized in Shanghai. This standard consists of the fire fight Science Graduate School of Shanghai Public Security Ministry, is responsible for drafting. The main drafter of the history of thick forest, Li XING Tong.
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