Electro-hydraulic compressive test instrument

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Steel pipe compressive test machine is mainly used for brick, stone, cement, concrete and other building materials, compressive strength test, can also be used to test the mechanical properties of other materials.

Machine Summary:

This compressive test instrument is mainly used for brick, stone, cement, concrete and other building

materials,compressive strength test, can also be used to test the mechanical properties of other materials.

Hydraulic System:

The oil tank is sucked through the filter screen and be inhaled pump oil ,through the petroleum pipeline of

oil pump transport to oil valve,When the hand wheel to send off the oil, due to the role of oil will push the

piston, the oil from the return pipe to tank,when the hand wheel to open get the oil, then the working fluid into

the fuel tank through the tubing, pressure tubing through and through oil return valve to tank.

Control System:

Electro-hydraulic compressive test instrument adopts hydraulic loading, electronic measuring, with a load of

figures, the loading rate shows that the maximum load to maintain, as well as overload protection and power

data retention and other functions.

Safety Protection Device:

When the test force more than 3% of the maximum test force, the overload protection, oil pump motor shut down.

Fixture:

Whole set fixtures include: a set compression platen fixture

Technical Parameter:

Model	Compressive test instrument
Max load	100kN （resist bend）	300kN （resist bend)	302kN （resist bend and compress）
Test force measuring range	4%-100%FS KN
Test force showed the relative error	≤indicating value±1%
Test Force Resolution	0.01KN
Hydraulic pump rated pressure	27MPa
Bearing compress plate size	φ155mm
Maximum distance between the upper and lower plate	230mm
Resist bending roll diameter	φ32mm
Maximum distance between the upper and lower resist bending rollers	165mm
Between two bending rollers upon the center distance	150mm
Between two bending rollers under the center distance	450mm
Piston diameter	φ130mm
Piston stroke	80mm
Motor power	3 phase 0.75 kW
Outside dimension	850×620×1340mm
Net weight	400Kg

Q:The greater the accuracy of a pressure gauge, the higher or lower the accuracy of the measurement, or the difference between the two: 2.5 represents the accuracy of the maximum range of 2.5%, 1.5, 1.5%, so the larger the number, the lower the relative accuracy, when it is necessary to pay attention to its maximum range is how much

Q:Can the pressure meter read on the computer?: This one is ok. With a CWY series of digital watches, in a pressure source, coupled with the computer on it. Provide pressure with a pressure source, connect a digital meter to 485, and then connect to the computer. On the computer, you can read directly the pressure values for each point of the pressure. On the computer will directly generate reports, and finally print out the data directly with the computer just fine. Our shipyard is used Shaanxi Chuangwei this equipment. Very convenient！ Increase of efficiency！

Q:The structure and working principle of the membrane box of the membrane pressure gauge?: Structure of membrane pressure gaugeThis instrument consists of measuring system (including joint, bellows etc.), transmission mechanism (gear drive mechanism comprises a pull rod mechanism), indicating part (including pointer and dial) and the shell (including watchcase, ring and table glass). The working principle of the instrument is based on the bellows pressure of the measured medium, the free end of corresponding elastic deformation of the transmission gear transmission and amplification, the pointer is fixed on the gear shaft by the measured values indicated in the table. There is also a zero adjustment device that allows easy adjustment of the zero position.The working principle of membrane pressure gaugeBy measuring the pressure of medium from the joint into the membrane box inner membrane box free end pressure and displacement, drive the movement gear to rotate through the connecting rod mechanism, another pointer to indicate the pressure value indicated on the dial.The bellows pressure meter mainly consists of a joint, a watch case, a film box, a connecting rod, a movement, a pointer and a dial plate.Main parameters of bellows pressure gauge;1, 60, Phi Phi dial diameter: 75, 100, 150, Phi phi;2, accuracy level: 1. Level 6; 2. 5 stage;3, range: 0 to 1.6; 0 to 2.5; 0~6; 0~16; 0~25; 0~40; -4 to 0; -6 to 0; -10 to 0; -16 to 0; -25 to 0; -40 to 0-2 to 2; -3 to 3; to 12; -5 to 0~4; -12 to 5; -8 to 8; to;-20 to 20Kpa;4. The film box, elastic element and joint body are made of copper alloy and stainless steel 316.5. The structure of diaphragm pressure gauge: radial direct installation type, axial direct installation type, axial belt front mounting type, axial clamp type and so on;

Q:What kind of pressure gauges do you need for repairing refrigerators?: Maintenance of refrigerators requires at least 3 pieces of pressure gauge, 2 pieces, 2.4 kilograms, a piece of 1.5. The refrigerator low pressure gauge can not measure high pressure.1. Maintenance of pressure gauges for refrigerators is a necessary tool for maintenance.2, through the high-low pressure to determine the operation of air conditioning.3. Vacuum system and evaporation pressure are determined by observing low pressure meter when pumping vacuum and charging refrigerant.4. Watch the high and low pressure meter at the same time when the refrigerator is running, and pass the evaporation pressure of the low pressure meter.

Q:Brother bought a new liquefied petroleum gas pressure reducing valve, valve side connected to a pressure gauge, I do not know what it means, how to read, consult you: This table is the pressure gauge, is to show the gas cylinder gas into the valve when the pressure, the general can probably display of remaining amount of gas within the cylinder; at the same time also can be connected to the gas cylinders used to detect out there is no leakage.With the table type valve is usually the manufacturers in order to meet the needs of the consumers of the product, but with the table type valve to leak one more chance, if the quality is not good, especially the pressure relief valve spring quality is poor, the use is not only safe, is more like a time bomb, when threaten our lives so, try to use the valve function less, this is the most secure.

Q:Working principle of electric contact pressure gauge: The work principle is very simpleIt uses sliding resistors to control the switchThe current signal is outgoing

Q:What are the problems with the pressure meter?What are the good solutions to these problems in the pressure gauge?: As everyone knows the main parts are made by pressure gauge, Bourdon tube, joint movement, the working principle of instruments is deformed by a spring pipe core (gear fan gear and drives the pointer in the dial Center) version of the show on the measured medium pressure, pressure gauge welding mainly lead zinc silver welding, argon welding. Arc welding, special welding and so on, the instrument clarinet is 100 thousand times the normal working pressure gauge the problems in the process of using zhongchanghui,1. instrument pointer because the measured medium instantaneous pulse increases, the pointer to the file below,2. instrument pointer, after the pipeline or equipment is unloaded, it will not be zero,3. additionally, the instrument fan teeth will wear out after working for a period of time,The movement of the instrument is the heart part of the pressure gauge. More than 80% of the instrument damage is caused by the damage of the movement, and the instrument can not be used. Now, I solve the problem of instrument jump by adding the spacing nail between the existing movement,4. plus isolation chip to solve the problem of instrument not return to zero5., from the fan type tooth widening, to solve the instrument contact surface, wear resistance, in order to achieve service life extension function

Q:See others welding, found that there are two pressure gauges on the cylinder, one is 0-0.3 range as if, and the other is 0-4 range, ask why, is it safety considerations or other reasons? thank: It shows two pressures, 1 side pressure and 2 side pressure, or the pressure before the valve and the working pressure after the valve.

Q:Is the accuracy level, not the type, thank you all: Accuracy class:Under normal use conditions, the degree of accuracy of measurement results of the instrument called instrument accuracy. The reference error is smaller, the instrument accuracy is high, and the reference range of error and instrument, so the use of the same accuracy of the instrument, often take the compression range range, so as to reduce the measurement error. In industrial measurement, in order to facilitate the representation of instrument quality, usually with the degree of accuracy to represent the accuracy of instrument. The degree of accuracy is maximum error of the reference is removed, and a percent sign. The degree of accuracy is an important indicator of the quality of the instrument. The instrument rating industry in China is divided into seven grades 0.1,0.2,0.5,1.0,1.5,2.5,5.0, and sign in meter scale or on the nameplate. The instrument used is called precision accuracy.Pressure meter accuracy level: 0.1, 0.16, 0.25, 0.4, 1, 1.5, 1.6, 2.5, 4, precision digital pressure gauge, and 0.05.By the way, "grade a" refers to the quality grade of this pressure gauge (Grade A or class a) and does not refer to the accuracy grade.

Q:When the pressure vessel is in hydraulic test, is the pressure gauge container good or the following?: When the pressure vessel performs hydrostatic test, if it is to measure the external pressure, the pressure gauge is well placed on the container; if it is to measure the internal pressure, the pressure gauge is well under the container.Because all are medium density p, and the pressure vessel are in the position of the upper and lower positions, there is a height difference of H, G=p*g*h and so on according to the density formula under two readings value is not the same, but the pressure, and the height difference can be ignored in this part of small pressure value.Turn left and turn right |Turn left and turn right |Turn left and turn right |

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