One The main purpose and scope of application of the testing machine

1. The microcomputer controlled frozen soil testing machine produced by our company meets the industry standard MT/T593.4-1996 for physical and mechanical performance testing of artificial frozen soil. Part 4: Test method for uniaxial compressive strength of artificial frozen soil and Part 6: Test method for uniaxial compressive creep of artificial frozen soil

It can simultaneously measure the test force, axial deformation, and radial deformation of the specimen. The microcomputer automatically measures and calculates the test data and results (test force, deformation, etc.), and prints out the test report (data, curve, and current test temperature).

The automatic control and data acquisition system has achieved full digital adjustment of the data acquisition and control process. After the experiment is completed, the computer automatically calculates according to the experimental parameter conditions set at the beginning of the experiment, and displays the corresponding experimental results. After the experiment is completed, each detection parameter can be queried and displayed, or connected to a printer for printing and output.

1. Equipped with a remote control box, it can achieve fast/slow lifting adjustment of the crossbeam, with flexible operation and easy switching.

2. It has the function of returning to the initial position after the experiment is completed, which is intelligent, efficient, and fast.

3. It has limit protection function and overload/overcurrent protection function for any working position, reliable and safe.

4. Build a powerful experimental database, where experimental data can be saved, queried, and accessed at any time

5. It can achieve various control methods such as constant rate force control, constant rate stress control, constant rate deformation control, constant rate strain control, constant rate stroke control, load constant rate control, elongation constant rate control, displacement constant rate control, low cycle control, and user programmable control.

6. Multiple test curves can be switched and displayed: stress-strain curve, force deformation curve, force displacement curve, force time curve, deformation time curve, displacement time curve, and stress-strain curve. Partial amplification of the experimental curve and comparison of multiple curve superposition.

Adding attachments can complete tensile, compressive, bending, torsional and other testing of other materials

The design, manufacturing, and inspection of the testing machine are based on the relevant clauses of the following standards

1) GB/T2611-2007 General Technical Requirements for Testing Machines

2) JJF1103-2003 Evaluation of Computer Data Acquisition System for Testing Machines

3) JJG139-1999 "Verification Regulations for Tensile, Compressive, and Testing Machines"

4) MT/T593.4-1996 Physical and Mechanical Properties Testing of Artificial Frozen Soil Part 4: Test Method for Uniaxial Compressive Strength of Artificial Frozen Soil Part 6: Test Method for Uniaxial Compressive Creep of Artificial Frozen Soil

II Main technical specifications of the testing machine

serial number

Project Content

Technical indicators

1

Experimental force

100kN

2

Test force resolution

1/±300000

3

Relative error of indication

1% - better than ± 1% within the range

4

Deformation small reading value

0.001mm

5

Range of horizontal beam movement speed

0.005--200mm/min

6

Range of force control rate adjustment:

0.005～5%FS/s；

7

Force control rate control accuracy

When the speed is less than 0.05% FS/s, it is within ± 2% of the set value; When the speed is ≥ 0.05% FS/s, it is within ± 0.5% of the set value

8

Range of deformation rate adjustment

0.005～5%FS/s；

9

Accuracy of deformation rate control

When the speed is less than 0.05% FS/s, it is within ± 2% of the set value; When the speed is ≥ 0.05% FS/s, it is within ± 0.5% of the set value;

10

Range of displacement rate adjustment

0.005～200mm/min；

11

Displacement rate control accuracy

When the speed is less than 0.5mm/min, it is within ± 1% of the set value; Speed ≥ 0.5mm/min, within ± 0.2% of the set value;

12

Effective span of testing machine

610mm

13

Effective compression space of testing machine

0-400mm

14

loading method

electric

15

Power supply voltage (must have reliable grounding measures)

Testing machine~220V ± 10% 50Hz

High and low temperature control box~380V ± 10% 50Hz

16

power

Testing machine 1.5KW; high and low temperature control box 7.0KW

17

Overall dimensions of the testing machine:

1080x2100x2320mm

18

Weight of the entire testing machine

≈1800kg

Low temperature environment test chamber compressor refrigeration (suitable for long-term testing)

Easy to use and affordable microcomputer controlled frozen soil testing machine, Jinan Zhongyan

technical performance

Operating Temperature

-50℃--0℃

Temperature fluctuation range inside the box

± 0.5 ℃ (gradient satisfied)

Effective size inside regular box

450 (width) × 500 (height) × 400 (depth) [approximately]

Low temperature adopts liquid nitrogen jet refrigeration method, and the cooling medium for the specimen is air

Furnace dimensions: 550 × 500 × 600mm

The time from room temperature to -50 ℃ is about 40 minutes

The temperature controller adopts a PID regulator with a display sensitivity of 0.1 ℃

The box is made of stainless steel plates both inside and outside, with a front door and an observation window. There is lighting inside the box

◆ System composition

Low temperature environment test chamber

a

Temperature sensor (PT100)

a

Temperature controller system (temperature control instrument, 0.2 level)

a set

Low temperature upper and lower pull rods and connector parts

a set

The low-temperature system adopts liquid nitrogen method (compressor)

a set

Test box cold air circulation system

a set

Bracket car mobility system

a

Circulating water cooling system (including stainless steel water tank, water pump, etc.)

a

◆ Safety devices: over humidity protection, leakage protection, dry burning protection (humidification system), water shortage protection, fan overload protection, compressor overpressure, overload, overcurrent protection, phase sequence protection, fuses

III Main configuration of the testing machine

name

Content

quantity

host

Portal structural framework;

ball screw pair

1 unit

2 sets

control system

All digital acquisition card

1 set

drive system

Fully digital AC servo motor and drive system

1 set

Remote control box

Convenient and efficient control of crossbeam movement

1 piece

sensor

100kN spoke type

1 piece

Safety protection device

1 set

Attachment

150mm spherical compression pressure plate, automatic leveling;

One axial measuring sensor;

Two radial measurement sensors;

1 set

microcomputer

Lenovo/2G/320G/19 LCD

1 unit

printer