This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of hydraulic fixed piston soil samplers. This standard applies to soil samplers for taking first-class quality undisturbed soil samples of fluid plastic, soft plastic, plastic and part of silt and silt sand formations in boreholes as specified in GB 50021 and JG J89. JG/T 5061.5-1995 Hydraulic fixed piston soil sampler JG/T5061.5-1995 Standard download decompression password: www.bzxz.net

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Construction Industry Standard of the People's Republic of China JG/T5061.5—1995
Hydraulic Fixed Piston Sampler
Issued on January 5, 1996
Implemented on June 1, 1996
Ministry of Construction of the People's Republic of China
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Construction Industry Standard of the People's Republic of China Hydraulic Fixed Piston Sampler
Hydraulic Fixed Piston Sampler
Subject Content and Scope of Application
JG/T5061.5—1995
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of hydraulic fixed piston samplers.
This standard applies to soil samplers for taking first-grade quality undisturbed soil samples of fluid plastic, soft plastic clay and some silt and silt sand in boreholes as specified in GB50021 and JGJ89.
Referenced standards
GB197 General thread tolerances and fits (diameter 1~355mm)GB50021 Geotechnical Engineering Investigation Code
JGJ89 Undisturbed soil sampling technical standards
JG/T5012 General technical conditions for packaging of construction machinery and equipment 3 Product classification
Main parameters and size series
The main parameter of the water pressure fixed piston is the outer diameter of the soil sampler sampling tube, and the series is as follows: 75mm; 100mm.
See Figure 1.
4222224
11-121314
1—connector, 2—screw plug, 3—steel ball; 4—0” type sealing ring; 5—“0” type sealing ring; 6—screw; 7—moving piston; 8—piston rod; 9—sampling tube; 10—cylinder; 11—fixed piston; 12—nut; 13—pressure plate; 14—L-type sealing ring Approved by the Ministry of Construction of the People’s Republic of China on 1996-01-05 and implemented on 1996-06-01
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3.3 Model
The model of the water pressure fixed piston soil sampler consists of the model code and main parameters. 3.3.1 Model compilation method
State Grid A port
Update and variant codes are in accordance with the Chinese phonetic alphabet The mother (husband writes in print) sequence indicates the main parameters: sampling tube outer diameter, mm
hydraulic type
3.3.2 Marking example
soil sampler
sampling tube outer diameter 75mm hydraulic fixed piston soil sampler: soil sampler TY75JG/T5061.5
Basic parameters
Basic parameters should comply with the provisions of Table 1.
Area ratio, %
Area ratio (A) is calculated according to formula (1)
Where: Dw
sampling tube outer diameter, mm:
D. - sampling tube cutting edge inner diameter, mm.
3.4.2 Internal clearance ratio (c), calculated according to formula (2). Internal clearance ratio, %
Ds-D.
×10 0%
Where.D.
-Inner diameter of sampling tube, mm.
4 Technical requirements
4.1 Products shall be manufactured according to drawings and technical documents approved by prescribed procedures. 4.2 Main parameters and basic parameters shall comply with the provisions of 3.1 and 3.4. Sampling tube length, mm
700;1000
Blade angle, ()www.bzxz.net
4.3 The sampling tube shall be made of cold-drawn seamless steel pipe with mechanical properties not less than 20, and its outer diameter deviation shall be less than 1%. Other dimensional deviations shall comply with the provisions of Table 2.
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Blade edge inner diameter
Straightness
The connector shall be made of materials with mechanical properties not less than 45 steel and shall be quenched and tempered , the hardness after heat treatment is HB234~270.
4.5 The inner and outer surfaces of the sampling tube should be smooth, without folding, scarring, rolling, cracks, delamination, deep hairline and straight lines. Slight concave and convex surfaces and other defects whose depth does not exceed the wall thickness tolerance range are allowed to exist. 4.6
The outer surface of the cylinder should be painted. After painting, the surface should be uniform and bright in color. The inner surface of the cylinder and the outer surface of the piston rod should be treated with rust prevention and corrosion resistance. Except for standard parts and moving pistons, the sampling tube and other parts should be treated with rust prevention, such as bluing or blackening, and the color should be uniform. 4.7
The thread tolerance and technical requirements shall be implemented in accordance with GB197. Assembly
4.8.1 All parts and purchased parts used for assembly must be inspected and qualified before assembly. 4.8.2 After assembly, all parts should be connected reliably and there should be no looseness after vibration. The moving piston and the fixed piston move freely in the cylinder and the sampling tube respectively, and there shall be no jamming. 4.8.3
When the sampling tube is 700mm long, the moving piston must ensure a stroke of 650mm; when the sampling tube is 1000mm long, the moving piston must ensure a stroke of 950mm.
After assembly, clean water is used as the working medium, and there shall be no leakage at each seal under a pressure of 3MPa. When the moving piston moves to the fixed piston position, the pressure system shall be immediately depressurized, and clean water shall flow out along the return hole of the piston rod inner hole connector. 5 Test method
5.1 Place the sampling tube of the water pressure fixed piston soil sampler on a 1.2m×1.0m flat plate not less than the third level, and use conventional methods to check its straightness, which shall comply with the provisions of Table 2.
Use a vernier caliper to measure the outer diameter, wall thickness and roundness of the sampling tube, and the deviations shall comply with the provisions of Table 2. 5.3 The quality of the inner and outer surfaces of the sampling tube shall comply with the provisions of 4.5 when checked with the naked eye and a depth gauge. 5.4
After heat treatment, the connector shall be checked with a hardness tester, and its hardness shall comply with the provisions of 4.4. 5.5 Ordinary threads shall be inspected with standard thread test gauges. 5.6 Move the movable plug to the upper part and fix it, and keep it under 3MPa water pressure for 5 minutes. There shall be no leakage at the sealing parts. After releasing the movable piston, continue to pressurize, and other performances shall comply with the provisions of 4.8.2 and 4.8.4. 6
Inspection rules
The water pressure fixed piston sampling device is divided into type inspection and factory inspection. 6.1 Type inspection is a comprehensive inspection of its performance, parameters, etc. Type inspection items include 4.1 to 4.8 of this standard. Type inspection should be carried out when one of the following situations occurs.
a. New products or old products are transferred to the factory for trial production and type identification; b. After formal production, when there are major changes in structure, materials, and processes that may affect product performance; when the national quality inspection and supervision agency proposes a type inspection requirement. c
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The soil sampler sampled must pass all the inspection items specified in this standard before the type inspection is passed. During formal production, after a certain number of products have accumulated, random inspections are carried out. The number of random inspections is 2%, and when there are less than 100 pieces, it should not be less than two pieces. When there are unqualified products, the random inspections should be doubled. If there are still unqualified products, they must be inspected piece by piece. 6.2 Factory inspection is an inspection of the main parameters of the soil sampler, the size deviation of the sampling tube, whether the moving piston and the fixed piston can move freely in the cylinder and the sampling tube, whether there is a stuck phenomenon, and the sealing performance of the moving and fixed pistons. Products can only be shipped after passing the inspection. 7 Marking, packaging, transportation, purchase and storage
The product name, model, specification, and manufacturer's mark should be on the obvious part of the product. Packaging
Packaging shall be carried out in accordance with JG/T5012 standard.
7.3 Transportation
During transportation, the product should be placed in the packaging box and shall not be transported naked. Measures such as moisture-proof, collision-proof and extrusion-proof shall be taken. It shall not be mixed with acidic and alkaline items for shipment.
The product shall be placed in a dry and ventilated warehouse and shall not be mixed and stacked with acidic and alkaline items. Additional instructions
This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Beijing Institute of Comprehensive Construction Machinery, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Comprehensive Survey and Research Institute of the Ministry of Construction and the Northern Survey and Research Institute of China Ordnance Industry. The main drafters of this standard are Cui Jianmin, Zhang Wenxiu and Qiao Guifang. This standard was entrusted to the Northern Research Institute of China North Industries Group Corporation for review.
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