Leather insulation tester

The utility model provides a leather insulation tester, including a iron cylinder, a copper block in the iron cylinder, and a copper block is provided on the copper block, the sample is sandwich Between the upper copper block and the lower copper block, the upper copper block and the lower copper block are provided with a top copper block temperature detecting hole and a lower copper block temperature detecting mounting hole, the upper copper block temperature detection hole installation The other end of the temperature detecting device is connected to the PID intelligent temperature controller, and the other end of the PID smart control device is connected to the upper surface of the upper copper block, the PID intelligent controller providing electrical energy by AC power. The utility model has a simple structure, convenient operation, small sampling, and high result accuracy.

The present invention relates to a leather test device, especially It involves a leather insulation tester. BACKGROUND OF THE INVENTION In autumn and winter, wearing a leather, leather shoes, leather and cold, the choice of people, the poor insulation, the shoes cannot guarantee the human physiological needs temperature, resulting in frostbite, freeze, Red swelling and other status. The insulation of the upper and clothing leather is one of the main factors affecting the finished shoes and leather insulation. When the temperature of the shoe, the temperature and the external temperature are very different, the temperature in the shoe cavity can remain unchanged so as to resist the external environmental impact reach the purpose of the cold.

For leather, factors affecting their thermosets include thickness, air state and quantity sandwiched in collagen fibers. The leather collagen fibers and the fibers there are a certain amount of air, and the still air is a good thermal insulating material. The more air, the better the insulation. The amount of air contained in the leather of different tissue structures is different, so insulation is different.

The heat has a variety of transmission, and the heat conduction is one of the modes of heat transfer, which is produced by different objects of different temperatures. For poor conductors, the steady-state balance method is generally used by measuring heat transfer rate indirect measurement, and the steady-state balance method is a method for measuring common use of poor conductive coefficients [34]. Leather shoes, the insulation of the suits is relatively late than textile costumes, and there is no national standard for the testing method. Therefore, the thermal conductivity characterization of leather insulation in the present invention. The larger the thermal conductivity, the smaller the insulation, but in turn, the greater the insulation.

Practical new type:

The utility model designs heat preservation of leather materials Leather insulation tester for performance. In order to achieve the above object, the technical solution used in the present invention is: a leather insulation tester, including a ferrous cylinder, ironThe copper block is placed in the cylinder, and the copper block is disposed on the lower copper block, and the sample is sandwiched between the upper copper block and the lower copper block, and the upper copper block and the lower copper block are respectively provided with the upper copper block temperature, respectively. Detecting the mounting hole and the lower copper block temperature detecting the mounting hole, the upper copper block temperature detects the other end of the temperature detecting device mounted in the mounting hole to connect to the PID intelligent controller, the other end of the PID smart control device is connected The upper surface of the upper copper block, the PID intelligent controller providing electrical energy by AC power.

As the preferred embodiment of the present invention, the upper copper block temperature detecting the temperature detecting device mounted in the mounting hole is a thermocouple;

As the preferred embodiment of the present invention, the lower copper block temperature detects a surface thermometer inside the mounting hole;

As the best embodiment of the present invention When the thermocouple is inserted into the upper copper block temperature, when the mounting hole is detected, the surface is silicone.

As compared with the prior art, the utility model has at least the advantage: When the utility model is used, the sample is first clamped in the upper and lower copper blocks. Between, then the upper copper block is heated, allowing heat from the upper copper block to the sample and lower copper block, when the temperature of the sample reaches steady state, record the temperature of the copper block, and then remove the sample, Heat the lower copper block, when the temperature difference of the copper block is large, remove the upper copper block, so that the copper block is naturally cooled, and finally do the thermal conductivity of the sample in the Sample; -T cooling rate curve. The utility model has a simple structure, easy to operate, sampling, and is still still. BRIEF DESCRIPTION OF THE INVENTION

The utility model is used to reference and refer to the textile insulation test method [YG (B) 606D fabric insulation meter, refer to national standard GB / Ti 1048-89 Provisions for Detection: Determination of the thermal conductivity of the physics experimental conductor thermal conductivity, a test instrument and method provided to solve the problem of test leather insulation.

When using YG (B) 606D fabric insulation, the sample is large, and the sample area is large. The leather has a large elasticity than the fabric, the flatness is relatively poor, the sample is formed to form an air layer with the instrument flat, resulting in a relatively large test error. In addition, if you have wind, it will make the sample out of the sample, and the spatial in the sample and the sample below the sample can also cause a large experimental error. So YG (B) 606D fabric insulation meter is not suitable for testing leather sample insulation

The following combined with the structural diagram to the utility model The insulation tester is described in detail:

Refer to Figure 1,The novel leather insulation tester includes iron cylindrical 1, and the iron cylinder 1 is provided with a copper disk. The copper block 11 is placed in the copper plate 11, and the lower copper block 11 is provided with a copper block 13, and the sample is placed. Between the upper copper block 13 and the lower copper block 11, the upper copper block 13 and the lower copper block 11 are respectively provided with the upper copper block temperature detecting hole and the lower copper block temperature detecting the mounting hole, the upper copper block temperature. It is detected that there is a hot spot 3 in the mounting hole 3, which is connected to the PID smart control thermometer since the upper copper block temperature detects the mounting hole, and the other end of the PID intelligent controller is connected to the upper copper block 13. The upper surface, the PID intelligent temperature controller supplies electrical energy by AC power; the lower copper block temperature detects surface thermometer 5 in the mounting hole.

The test method of the present invention is described in connection with the accompanying drawings:

Test step: (1) measurement, lower copper discs 13, 11 with a cursor caliper, a sample of air-conditioned samples The quality of the upper and lower copper blocks 13, 11 measured three times average. (2) The sample to be tested is inserted into the iron thick bottom cylinder 1, so that the sample to be tested is in good contact with the lower copper block 11. Put the upper copper block 13 on the sample, so that the upper copper block 13, the sample, the center of the copper block 11 is on a straight line.

(3) When the thermocouple 3 is inserted into the upper copper block temperature, when the mounting hole is detected, the silicone fat is wiped, and inserted into the upper copper block temperature detects the bottom of the mounting hole, so that the thermocouple temperature is measured. The end and the upper copper block 13 are in good contact, and the heat electrocouple 3 is connected to the wiring of the PID intelligent temperature controller.

(4) Surface thermometer 5 of TestO615 5 pairs the copper block temperature detection hole, turn on the power and PID smart control temperature, set the PID's target temperature 36 deg; C, the temperature control time is 30 min, the heating furnace begins to heat the upper copper block 13, and the heat is passed through the upper copper block _ sample _ under copper block.

(5) According to the steady state, a stable temperature distribution must be obtained, which is waiting for a long time, in order to improve efficiency, first turn the power voltage to ldquo; high rdquo After a few minutes, when the PID intelligent temperature controller temperature reaches 36 deg; c to prepare readings, read the value of the TestO615 surface thermometer 5 every 30 seconds, if the temperature indicates the surface temperature under the sample in 2 minutes, It is considered to have reached a steady state. The TL, T2 value corresponding to the PID intelligent temperature controller, TestO615 surface thermometer 5 is recorded steady state. (6)Remove the sample, continue to heat the lower copper block 11, when the temperature T2 of the upper copper block 13 is higher than the temperature T2 of the surface thermometer 5, the upper copper block 13 is removed, so that all the surfaces of the lower copper block 11 are exposed.In the air, the lower copper block 11 is naturally cooled, and the temperature indication of the lower copper block is read once, and the temperature is recorded until the temperature falls below the T2 below.For the copper disc, select the measurement data adjacent T2 to find the cooling rate.The thermal conductivity of the sample is calculated according to the following formula.