This standard specifies the definition, product classification and naming, requirements, test methods, inspection rules, marking, packaging, transportation and storage of puncture-deflation type road descent. GA/T 421-2003 Puncture-deflation type road descent GA/T421-2003 Standard download decompression password: www.bzxz.net

This standard was proposed by the Equipment and Finance Bureau of the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Technical Committee for Standardization of Police Equipment and Police Uniforms of the Ministry of Public Security. GA/T421—2003
This standard was drafted by Wenzhou Huaan Warning Equipment Co., Ltd., and Beijing Tongmei Technology Development Co., Ltd. participated in the drafting. The main drafters of this standard are: Zhang Jianglu, Xin Hongwei, Cai Yifen, Mei Yingchun. 1 Scope
Punch and Deflate Barriers
GA/T 421—2003
This standard specifies the definition, product classification and naming, requirements, test methods, inspection rules, marking, packaging, transportation and storage of puncture and deflate barriers.
This standard applies to puncture and deflate barriers. 2 Normative References
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties reaching an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T191 Pictorial markings for packaging, storage and transportation
3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Punctured deflatable road-block
Punctured deflatable road-block is a police device used to set up obstacles on the road during the execution of tasks, puncture and deflate the tires of vehicles that pass through, so that they cannot drive normally and effectively intercept (criminal suspect) vehicles. Hereinafter referred to as roadblock. 3.2
Intercept with effect
Punching the tires of vehicles that pass through, causing the tires to lose inflation pressure within a specified time and unable to drive normally is called effective interception.
Telling length of road-blockThe maximum length of a road-block that can effectively intercept and is perpendicular to the direction of vehicle travel. 3.4
Thorn
The part that directly punctures and deflates the tire of a vehicle that has passed through. 3.5
Telling length of thornThe distance from the air inlet or groove on the top of the thorn to the bottom surface. (See Figure 1) Figure 1
GA/T 421 --2003
Telling length of thornThe projection distance of adjacent thorns in the direction of the effective length of the road-block when the thorn is expanded to the effective length of the road-block. 4 Product classification and naming
4.1 Classification
According to the working principle, it is divided into mechanical structure type (code "J\) and electromechanical composite type (code \D\). 4.2 Naming
The roadblock model shall be named according to the following structure and requirements 000
Classification code
Product name code (the Chinese pinyin of the roadblock is LZ in capital letters) Example: The product model is LZ-J, which means: a mechanical structure roadblock. 5 Requirements
5.1 General requirements
The surface of the roadblock shall be free of rust and mechanical damage, the fastening parts shall be firm and not loose, and the movable parts shall be flexible and reliable. The components shall be easily connected.
5.2 Operation and activity
The roadblock shall be easy to unfold, fold and operate, and the components shall be coordinated and operate accurately; for mechanical structure roadblocks: the unfolding time shall not exceed 1 minute, and the folding time shall not exceed 1 minute; for electromechanical composite roadblocks: the unfolding time shall not exceed 5 minutes, and the folding time shall not exceed 5 minutes. 5.3 Mass
The mass of the roadblock (including the box, but excluding accessories and tools) shall not exceed 25 kg. 5.4 Effective length of the roadblock
is greater than 5m.
5.5 Effective length of the thorn
is greater than 20 mm.
5.6 Effective spacing of the thorn
is less than 75 mm,
5.7 Needle pull-out force
The thorns of the roadblock should withstand a tensile force of 30N in the axial direction without falling off: they should fall off immediately when a tensile force of 100N is applied. 5.8 Effective interception time
After the wheels of the test vehicle pass over the roadblock, the time for the tire to completely lose the inflation pressure should not be greater than 1i. 5.9 Climate and environmental adaptability
The roadblock should meet the requirements of 5.1 and 5.2 under the ambient temperature of -40℃ to +55℃. 6 Test method
6.1 General requirements Inspection
Visually and manually inspect the appearance and structure of the roadblock body and accessories. 2
6.2 Operational hot activity test
GA/T 421---2003
Unfold the barrier to the effective length of the barrier, record the time of unfolding, then retract to the initial state, record the time of retraction. 6.3 Mass
Weigh the mass of the barrier with a general scale.
6.4 Effective length of barrier
Unfold the barrier to the effective length of the barrier, and use a tape measure to measure the straight-line distance between the two outermost needles of the barrier. 6. 5 Effective length of needles
Measure with a ruler.
·6.6 Effective spacing of needlesbzxZ.net
Unfold the barrier to the effective length of the barrier, and use a steel ruler to measure the projection distance of adjacent needles in the direction of the effective length of the barrier. 6.7 Needle pull-out force
Choose a needle, tighten its base, clamp the needle with a clamp, then use a hand-pull dynamometer to apply tension in the axial direction of the needle between the needle and the base, slowly increase the tension to pull the needle out, the measurement result should be greater than 30N and less than 100N. Test three different needles in total. 6.8 Effective interception time
6.8.1 Test device
A test vehicle with a total mass of 1200kg (including its own mass and load mass), a test tire with a specification of 195/60R14 without wear and tear and no air leakage, a cement road, and a stopwatch.
6.8.2 Test steps
Perform the following steps:
a) Unfold the test roadblock sample on the cement road to the effective length of the roadblock, and the test car passes over the test roadblock at a speed of 20km/h±5km/h;
b) When the test car passes through the test road, start the stopwatch to time; observe the punctured tires, and record the time when the tires completely lose the inflation pressure. 6.9 Climate and environmental adaptability test
6.9.1 Place the roadblock sample in the high temperature test chamber and adjust the test chamber according to the following steps: a) Keep it at 25℃±2℃ for 30min,
b) Raise the temperature to 55℃±2℃ and keep it for 4h;
Disconnect the power supply of the high temperature test chamber, take out the sample, and conduct appearance structure inspection and roadblock operational flexibility test within 10min. The test method is the same as 6.1 and 6.2.
6.9.2 Place the roadblock sample in the low temperature test chamber and adjust the test chamber according to the following steps: a) Keep at 25℃±2℃ for 30min
b) Cool to -40℃+3℃ and keep for 4h,
Disconnect the power supply of the low temperature test chamber, take out the sample, and conduct appearance and structure inspection and roadblock operational flexibility test within 10min. The test method is the same as 6.1 and 6.2.
7 Inspection rules
7.1 Inspection classification
It is divided into factory inspection and type inspection.
7.2 Factory inspection
7.2.1 Before leaving the factory, each product shall be inspected according to the items specified in Table 1. 7.2.2 The batch sampling test pieces shall be selected from the batches produced recently and qualified by the factory inspection, with a batch of no more than 1000 pieces. For the products produced continuously, the batch shall be produced continuously for half a year. The number of samples of the above batches shall not be less than 2 pieces. 7.2.3 The batch sampling test items shall be carried out in accordance with the provisions of Table 1. 3
GA/T 421--2003
Test items
General requirements
Operational flexibility
Effective length of roadblock
Effective length of needle
Effective spacing of needle
Pull-out force of needle
Effective interception time
Adaptability to climate and environment
Note: "" indicates the items that need to be tested. 7. 3
Type inspection
Table 1 Inspection items and sequence
Technical requirements Test methods
Roadblock type inspection is carried out in the following cases: new design or major changes in design, process, or material; resumption of production after a six-month suspension;
Continuous production for two years:
Contract provisions.
Sampling of type test specimens shall be in accordance with 72.2. Type test inspection items and sequence shall be in accordance with Table 1. Full inspection
Factory inspection
Type test
For a test piece that has undergone type testing, if any item does not meet the technical requirements specified in Table 1, double sampling may be conducted for that item 7.3.4
Test, if the retest still fails, it shall be judged as unqualified. Marking, packaging, transportation and storage
8.1 Marking
The main body of the roadblock shall be clearly marked with permanent markings, which shall include the following contents: manufacturer's name or trademark;
b) product model;
date of production.
8.2 Packaging
8.2.1 The packaging of the product shall ensure that it will not be damaged during transportation. 8.2.2
The packaging box of the product shall be accompanied by a product certificate and instructions, and the packaging box shall be marked with the following contents: manufacturer's name or trademark;
product model and number;
quantity and gross weight;
date of export;
outer dimensions (length × width × height):
pictorial markings for packaging, storage and transportation.
pictorial markings for packaging, storage and transportation shall comply with the provisions of GB/T191. 8.3 Transportation and storage
GA/T 421---2003
8.3.1 When shipping, the product should be loaded and handled with care, and should be protected from heavy pressure and collision. It is strictly forbidden to expose it to rain, moisture, sunlight, and chemical corrosion. The product should be stored in a ventilated and dry warehouse, at least 250mm above the ground, with a gap of no less than 200mm around. 8.3.2
The product cannot be stored with corrosive substances and should be kept away from heat sources. 8.3.3
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