External circulating precise constant-temperature medium box and using method thereof
A technology of constant temperature medium and external circulation, which is applied in the direction of chemical instruments and methods, shells or chambers, laboratory appliances, etc. It can solve the problems affecting the precision and accuracy of the test, the difficulty of precise control of large water baths, etc., and achieve easy maintenance , uniform medium temperature, high temperature control accuracy
Inactive Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The current commonly used constant temperature medium tank heater is usually placed in the water tank, or a secondary water tank is used. This configuration is very difficult to achieve precise control of the temperature of a large water bath tank, thus affecting the accuracy and accuracy of the test.
Method used
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[0022] External circulation precision constant temperature medium box such as figure 1 As shown, it includes the tank 2, the circulating water circuit formed with the outlet pipeline 11 and the return pipeline 3, and the circulating water pump 8;
[0023] A circulating heating system is separately arranged on the external circulating waterway of the box body 2, and a temperature control system is arranged to control the circulating heating system;
[0024] The outlet pipeline 11 is set at a corner of the bottom of the tank 2, and the return line 3 is set at the top of the tank 2 close to the liquid surface;
[0025] The circulation heating system comprises a circulation heating chamber 5 and an electric heater 4;
[0026] The electric heater 4 is installed inside the circulating heating chamber 5, and the outlet pipeline 11 is led out from the tank 2 and then connected to the heating chamber 5 through the circulating water pump 8, and then merges with the return pipeline 3; ...
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The invention discloses an external circulating precise constant-temperature medium box used when hydraulic pressure intensity of a plastic pipe is tested. The external circulating precise constant-temperature medium box comprises a box body, a circulating water passage consisting of the box body, a water outlet pipeline and a return pipeline, and a circulating water pump and is characterized in that: a circulating heating system is independently arranged on the circulating water passage outside the box body and a temperature control system is arranged for controlling the circulating heating system; the circulating heating system comprises a circulating heating cavity and an electric heater; the electric heater is arranged in the circulating heating cavity; the water outlet pipeline is led out of the box body, and is inserted into the heating cavity through the circulating water pump and then is converged with the return pipeline; and the temperature control system comprises a temperature sensor, a temperature controller and a data sensing line. The temperature in the external circulating precise constant-temperature medium box can be controlled precisely no matter how large the volume of a water tank is, and the temperature in the whole using space is uniform; and through actual measurement, both the temperature control accuracy and the uniformity of a temperature field are both less than 1 DEG C.
Description
technical field [0001] The invention relates to a testing device for the physical and mechanical properties of polymer materials, in particular to an external circulation precision constant temperature medium box for testing the hydraulic strength of plastic pipes, which is a combination of mechanical devices and precision measurement and control. Background technique [0002] When performing hydraulic tests on plastic pipes, the test requires a temperature environment that meets the requirements of relevant standards for the test. Therefore, the sample needs to be placed in a constant temperature medium box for testing, and deionized water is usually used as the test medium. When the test sample is larger and heavier, a crane will be used to put the sample into the water tank. At this time, a larger volume water tank is required. Usually, the volume of this type of water tank can reach 5 cubic meters or even more. [0003] Since the results of the hydraulic test of the plas...
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IPC IPC(8): B01L1/00
Inventor 武志军李玉娥张伟李晓林魏若奇
Owner CHINA PETROLEUM & CHEM CORP