CN1155818C - Indirectly cooled sandwich fixed-temperature calorimeter - Google Patents

Abstract

The present invention relates to an indirectly cooled sandwich constant-temperature calorimeter which comprises an inner drum, a cover, an inner layer constant-temperature drum, an outer layer constant-temperature drum and a temperature adjusting drum, wherein a refrigeration heat engine is arranged in the outer layer constant-temperature drum. The present invention is characterized in that a temperature sensor is arranged in the inner layer constant-temperature drum; an output terminal of the temperature sensor is connected with a signal input terminal of a temperature controlling device with a temperature setting circuit; an output terminal of the temperature controlling device is connected with a triggering terminal of a power supply switch circuit of the refrigeration heat engine; the temperature controlling device is formed by connecting a signal input circuit, a signal processing circuit and the temperature setting circuit in series; a temperature adjuster with the power supply switch circuit is arranged in the inner drum cover, and the triggering terminal of the power supply switch circuit is connected with the output terminal of the temperature controlling device; a thermal-insulating layer is coated on the inner wall of the inner drum cover, and the inner wall of the inner drum cover is provided with a sealing device which is tightly sealed; medium circulating pumps controlled by the temperature controlling device are arranged between every two drums. The present invention can accurately fixes the environmental temperature of the inner drum, so the heat capacity change of a measuring system is reduced to a minimum so as to perfect linear compensation. The device can be suitable for various adverse testing environment.

Description

Indirectly cooled sandwich fixed-temperature calorimeter

Technical field the present invention relates to material heating-value determination instrument, relates in particular to the architecture advances of the determining instrument of coal or wet goods material thermal value.

Background technology is present, the basic structure of measuring the instrument of material thermal value both at home and abroad all has outer bucket, interior bucket, inner barrelhead, cover inner barrelhead wherein on the bucket and place outer bucket, adopt working methods such as heat-insulating, thermostatic type, self-action, dry type, the temperature of outer bucket and inner barrelhead depends primarily on environment temperature.Under the constant situation of environment temperature, the thermal capacity of measuring system is stable, can guarantee to measure exactly the thermal value of material; But because the temperature of instrument environment of living in is difficult to constant, and change big, non-linear and be difficult to and predict, cause outer barrel temperature to change greatly, thereby cause that measurement system thermal capacity changes, so that be difficult to accurately measure the thermal value of material, therefore, 5 ℃ of every variations of GB regulation environment temperature are the thermal capacity of calibration measurements system again just, owing to need often to demarcate thermal capacity, cause testing efficiency low, test precision, accuracy are difficult to improve, and instrument requires harsh to test site, can not adapt to season, temperature variation, be difficult to adapt to on-the-spot on-line analysis.

Summary of the invention is at the above-mentioned shortcoming of prior art, technical matters to be solved by this invention be to provide a kind of can accurately fix in the bucket environment be the initial temperature of constant temperature bucket, the thermal capacity of measuring system changed reduce to minimum, carrying out perfect test value compensation, thereby adapt to the indirectly cooled sandwich fixed-temperature calorimeter of various abominable test environments.

For this reason, technical solution of the present invention is a kind of indirectly cooled sandwich fixed-temperature calorimeter, comprise: interior bucket, inner barrelhead, internal layer constant temperature bucket, outer constant temperature bucket, temperature adjustment bucket, cover inner barrelhead on the bucket wherein and place internal layer constant temperature bucket, internal layer constant temperature bucket places outer constant temperature bucket, be connected by pipeline between outer constant temperature bucket and temperature adjustment bucket, be provided with the system cooling and heating machine in the temperature adjustment bucket; It is characterized in that: be provided with temperature sensor in the described internal layer constant temperature bucket, the output terminal of temperature sensor is connected with the signal input part of the temperature regulating device that has temperature setting circuit, and the output terminal of temperature regulating device connects the trigger end of the power switch circuit of described system cooling and heating machine.

Described temperature regulating device is to be in series by signal input circuit, signal processing circuit and temperature setting circuit.

Be provided with the thermosistor of charged source switching circuit in the described inner barrelhead, the trigger end of its power switch circuit connects the output terminal of temperature regulating device; Also be covered with thermofin on the inwall of described inner barrelhead, and be provided with and cover the tightening seal device.

Between described outer constant temperature bucket and internal layer constant temperature bucket, between internal layer constant temperature bucket and interior bucket, between interior bucket and temperature adjustment bucket, be equipped with the medium circulation pump that is controlled by temperature regulating device between temperature adjustment bucket and outer constant temperature bucket; The heating unit of described system cooling and heating machine can be installed in the outer constant temperature bucket, also is provided with the medium stirrer in described outer constant temperature bucket.

Described signal input circuit is to be connected and composed successively by signal amplification circuit, multi-way switch chip, low-pass filter circuit, mould/number conversion circuit; Described temperature setting circuit is the keyboard input circuit of computing machine; Described signal processing circuit is that computing machine and interface circuit I/O thereof connect to form.

Improve through said structure, indirectly cooled sandwich fixed-temperature calorimeter of the present invention has following advantage:

Owing in internal layer constant temperature bucket, be provided with temperature sensor, its output terminal is connected with the signal input part of the temperature regulating device that has temperature setting circuit, and the output terminal of temperature regulating device connects the trigger end of the power switch circuit of described system cooling and heating machine, when after the medium temperature that configures internal layer constant temperature bucket on the temperature setting circuit, the system cooling and heating machine promptly freezes/the heat acting according to design temperature, and by the temperature adjustment bucket at place and the outer constant temperature bucket that is attached thereto, internal layer constant temperature bucket, accurately the residing environment temperature of bucket is constant on the setting value by artificial control in the control; And the thermosistor of the charged source switching circuit of establishing in the inner barrelhead and lid tightening seal device, the influence, the interference that stop environmental variance to cause from loam cake; The environment temperature of bucket was constant in these technical measures had guaranteed to test when initial, it is very little influenced by environmental change, thereby changing, the thermal capacity that makes the measurement system reduces to minimum, make perfect test value compensation in order to instrument, improve the measuring accuracy and the accuracy of instrument greatly, avoided having improved testing efficiency because of the environmental change disadvantage of calibration measurements system thermal capacity again of often having to;

At the set medium circulation pump that is controlled by temperature regulating device between outer constant temperature bucket and internal layer constant temperature bucket, between internal layer constant temperature bucket and interior bucket, between interior bucket and temperature adjustment bucket, between temperature adjustment bucket and outer constant temperature bucket, reach medium stirrer set in outer constant temperature bucket, can make the initial temperature of the preceding total system of each test reach setting value very soon, and guarantee that the temperature of internal layer constant temperature bucket in test is uniform and stable;

Described temperature regulating device adopts integrated circuit (IC) chip and computer autocontrol technique and signal processing circuit, makes temperature setting and temperature control efficient more, stable; Simultaneously, computing machine is the detection, record, calculating etc. of test data such as double as oxygen bomb temperature rise also, simplifies control, a tractor serves several purposes;

Experiment confirm: when variation of ambient temperature surpasses 20 ℃, the test accuracy of indirectly cooled sandwich fixed-temperature calorimeter of the present invention still is better than GB (GB/T213-1996); Oxygen bomb is put into temperature when changing for 5 ℃～35 ℃, and stringency of test guarantees in GB (GB/T213-1996) allowed band;

The invention process is easy, and is simple in structure, and effect is remarkable, has international advanced.

Description of drawings now is described as follows the present invention in conjunction with the accompanying drawings.

Fig. 1 is an embodiment of the invention general structure synoptic diagram.

Fig. 2 is the circuit theory diagrams of the temperature regulating device of the embodiment of the invention.

Embodiment is as shown in Figure 1: indirectly cooled sandwich fixed-temperature calorimeter of the present invention, it constitutes: oxygen bomb 1 places the medium of bucket 2 within the heat insulation bucket wall and goes up coated with inner barrelhead 3, and interior bucket 2 places the medium of layer constant temperature bucket 4 within the metal drum wall, internal layer constant temperature bucket 4 places the medium of layer constant temperature bucket 5 outside the heat insulation bucket wall, outer constant temperature bucket 5 is connected by pipeline with 6 in the temperature adjustment bucket of heat insulation bucket wall, is provided with system cooling and heating machine 7 in the temperature adjustment bucket 6; It is characterized in that: be provided with temperature sensor 8 in the described internal layer constant temperature bucket 4, the output terminal of temperature sensor 8 is connected with the signal input part of the temperature regulating device 9 that has temperature setting circuit 9-0, and the output terminal of temperature regulating device 9 connects the trigger end of the power switch circuit 10 of described system cooling and heating machine 7.

Be provided with the thermosistor 11 of charged source switching circuit 10 in the described inner barrelhead 3, the trigger end of its power switch circuit 10 connects the output terminal of temperature regulating device 9; Also be covered with thermofin 12 on the inwall 3-0 of described inner barrelhead 3, and be provided with and cover tightening seal device (not shown).

Be respectively equipped with medium circulation pump B3, B4, B1, the B2 that is controlled by temperature regulating device 9 at described outer constant temperature bucket 5 and 4 in internal layer constant temperature bucket, internal layer constant temperature bucket 4 and 2 in interior bucket, interior bucket 2 and 6 in temperature adjustment bucket, temperature adjustment bucket 6 and 5 in outer constant temperature bucket; The heating unit 7-1 of described system cooling and heating machine 7 is installed in the outer constant temperature bucket 5, also is provided with medium stirrer 13 in described outer constant temperature bucket 5.

As shown in Figure 2: described temperature regulating device 9 is to be in series by signal input circuit 9-1, signal processing circuit 9-2 and temperature setting circuit 9-0.

Described signal input circuit 9-1 is connected and composed successively by signal amplification circuit 9-11, CD4051 multi-way switch chip 9-12, RLC low-pass filter circuit 9-13, ICL7135 mould/number conversion circuit 9-14; The keyboard input circuit that described temperature setting circuit 9-0 is a computing machine, it is by keyboard temperature parameter to be input to computing machine, accepts keypad information by temperature setting circuit 9-0 then; Described signal processing circuit 9-2 is that computing machine and interface circuit I/O thereof connect to form.

Further specify principle of work below in conjunction with accompanying drawing:

Cover tight inner barrelhead 3, operate the start of this instrument, the computing machine of temperature regulating device 9 carries out temperature test and constant process according to the setting of temperature setting circuit 9-0 to the water temperature of internal layer constant temperature bucket 4, in this process, the thermosistor 11 that temperature regulating device 9 is opened in system cooling and heating machine 7, the inner barrelhead carries out temperature adjustment, and open each medium circulation pump B1, B2, B3, B4 and quicken the water circulation between each barrel, in the hope of reaching the temperature balance between each barrel as early as possible; Water in internal layer constant temperature bucket 4 is after said process is stabilized on the design temperature, temperature regulating device 9 promptly turn-offs the power supply of system cooling and heating machine 7, thermosistor 11, each medium circulation pump B1, B2, B3, B4, make it shut down, still work and only stay medium stirrer 13; Then to oxygen bomb 1 igniting test, when rising to when beginning to descend after the highest, oxygen bomb 1 temperature ends, computing machine is write down maximum temperature difference, promptly finish one and take turns test, the lower whorl test repeats the same design temperature and the operating process of wheel test then, thereby obtain a plurality of test datas under same setting internal layer constant temperature barrel temperature, eliminated fully significantly, instrument self thermal capacitance due to the random temperature variation is disorderly and to the interference of test result, obtain the test data of high precision, pin-point accuracy.

Claims (6)

1, a kind of indirectly cooled sandwich fixed-temperature calorimeter, comprise: interior bucket, inner barrelhead, internal layer constant temperature bucket, outer constant temperature bucket, temperature adjustment bucket, cover inner barrelhead on the bucket wherein and place internal layer constant temperature bucket, internal layer constant temperature bucket places outer constant temperature bucket, be connected by pipeline between outer constant temperature bucket and temperature adjustment bucket, be provided with the system cooling and heating machine in the temperature adjustment bucket; It is characterized in that: be provided with temperature sensor in the described internal layer constant temperature bucket, the output terminal of temperature sensor is connected with the signal input part of temperature regulating device, and the output terminal of temperature regulating device connects the trigger end of the power switch circuit of described system cooling and heating machine.

2, indirectly cooled sandwich fixed-temperature calorimeter as claimed in claim 1 is characterized in that: described temperature regulating device has temperature setting circuit.

3, indirectly cooled sandwich fixed-temperature calorimeter as claimed in claim 2 is characterized in that: described temperature regulating device is to be in series by signal input circuit, signal processing circuit and temperature setting circuit.

4, as arbitrary described indirectly cooled sandwich fixed-temperature calorimeter in the claim 1,2,3, it is characterized in that: be provided with the thermosistor of charged source switching circuit in the described inner barrelhead, the trigger end of its power switch circuit connects the output terminal of temperature regulating device; Also be covered with thermofin on the inwall of described inner barrelhead, and be provided with and cover the tightening seal device.

5, indirectly cooled sandwich fixed-temperature calorimeter as claimed in claim 4 is characterized in that: between described outer constant temperature bucket and internal layer constant temperature bucket, between internal layer constant temperature bucket and interior bucket, between interior bucket and temperature adjustment bucket, be equipped with the medium circulation pump that is controlled by temperature regulating device between temperature adjustment bucket and outer constant temperature bucket; The heating unit of described system cooling and heating machine is mounted in the outer constant temperature bucket, also is provided with the medium stirrer in described outer constant temperature bucket.

6, indirectly cooled sandwich fixed-temperature calorimeter as claimed in claim 5 is characterized in that: described signal input circuit is to be connected and composed successively by signal amplification circuit, multi-way switch chip, low-pass filter circuit, mould/number conversion circuit; Described temperature setting circuit is the keyboard input circuit of computing machine; Described signal processing circuit is that computing machine and interface circuit I/O thereof connect to form.

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