CN204575389U - A kind of on-line checkingi material heating quality, temperature and gas collecting device - Google Patents

Abstract

The utility model discloses an on-line detection material heating quality, temperature and gas collection device, which comprises a heating system composed of an oven, a heater and a temperature control knob; a quality detection system composed of an electronic balance and a quality sensor; -Multi-point temperature detection system composed of constantan thermocouple, temperature display instrument and temperature sensor; gas collection system composed of air guide pipe, condenser pipe, activated carbon pipe and air pump; data collection system composed of sensor and computer. The device of the utility model can not only meet the requirements of synchronous on-line detection of the quality of materials such as wood and medicinal powder and multi-point temperature changes in the experimental process, but also collect the gas generated in the thermal decomposition process at the corresponding temperature, and can also be used separately Measuring one of them avoids the repeated "take-out-reweighing" process of substances. The structure is simple and reliable, and it is intelligent and practical, saving time and greatly reducing the cost of the experiment.

Description

A device for online detection of substance heating quality, temperature and gas collection

technical field

The utility model relates to the field of conventional parameter measurement of tiny substances, in particular to an online detection device for heating quality, temperature and gas collection of substances.

Background technique

In the existing technology, the equipment for measuring the mass change of tiny substances such as wood, medicinal powder, medicinal materials, etc. during the heating process, the internal temperature rise, and the collection of gas generated by decomposition at the corresponding temperature are placed separately, and the measurement is also manual measurement. When measuring the mass change, the tiny substances in the oven should be removed and cooled and put into the balance for measurement. On the one hand, the efficiency is low, because manual fixed-point measurement is required throughout the whole process; on the other hand, the measurement data is inaccurate, because the measurement method adopts isothermal intermittent weighing In this way, when the tiny substance in the oven is moved to the balance for measurement, the moisture content of the tiny substance will change; there is also a measurement that cannot be synchronized, because the mass change of the tiny substance is due to complex physical changes in the heating process. Chemical changes, these changes correspond to a temperature value, the temperature on the oven does not represent the real temperature inside the substance, the movement and measurement process of tiny substances will take a certain amount of time, which will cause the quality measurement and temperature test to be out of sync, so Calculation data will also produce errors. At present, there are many devices for collecting the decomposition gas of substances. When the temperature is low, an alcohol lamp is usually used to directly heat the test tube to collect the gas. in the furnace.

It can be seen from this that in the common method, the sample should be taken out of the oven to cool during the weighing process, so that the temperature test and the quality test cannot be synchronized, and due to the alternation of high and low temperature and the change of environmental humidity, such as absorbing moisture from the air when removing, etc. The accuracy of the actual data will be affected. In addition, the temperature corresponding to the gas produced by the decomposition of the substance cannot reflect the actual temperature inside the substance, so there is no equipment that integrates the quality test device, temperature test device and gas collection device.

Contents of the invention

In order to overcome the problem that the temperature test and quality measurement of the existing equipment cannot be synchronized and the gas produced by the decomposition of the substance cannot reflect the actual temperature inside the substance and the measurement accuracy is low, the utility model provides an online detection of the heating quality, temperature and gas collection device of the substance .

The technical solutions adopted by the utility model to solve the technical problems include: an online detection material heating quality, temperature and gas collection device, after the oven is modified, weighing equipment, temperature testing equipment and gas output equipment are installed on the oven It consists of five parts: a heating system, a continuous quality online detection system, a multi-point temperature online detection system, a gas collection system and a data collection system. The system is connected by a transmission line and installed on the upper part of the heating system through a heat insulation layer. The gas collection system is connected to the heating system through a glass air duct and is located on the side of the heating system;

The heating system is composed of an oven, a heater installed in it, and a temperature control knob on the side;

The continuous online quality detection system is composed of an electronic balance and a quality sensor connected by a transmission line. The electronic balance is fixed on the upper part of the oven through a heat insulation layer. The electronic balance is composed of a display, a circular tray, a wall bar and a square tray. The display instrument is connected to the quality sensor through the transmission line, and the square tray is located inside the oven and connected to the circular tray at the bottom of the electronic balance through the wall bar that passes through the hole on the top of the oven;

The multi-point temperature on-line detection system is composed of an armored nickel-chromium-constantan thermocouple, a temperature indicator, and a temperature sensor connected by a transmission line in turn, and the armored nickel-chromium-constantan thermocouple is inserted through the hole on the upper part of the oven. inside the oven;

The gas collection system is mainly composed of a glass air guide tube, a condenser tube, an activated carbon tube and an air pump. One end of the glass air guide tube is connected to the air valve on the upper part of the oven through a rubber ferrule, and the other end is connected to the upper part of the condenser tube through a rubber ferrule. Connection, the two ends of the activated carbon tube are respectively connected to the bottom branch of the condensation tube and the air pump through rubber ferrules;

The data acquisition system is composed of a temperature sensor and a quality sensor connected to a computer through a transmission line.

Both the bottom of the electronic balance and the upper part of the oven have holes with a diameter of 1.5 mm, and the positions of the holes are not on a vertical line.

The wall rod can move up and down without damping.

There are 3 pairs of armored nickel-chromium-constantan thermocouples with a diameter of 1mm and a measurement accuracy of ±1°C, which can be inserted into wood, veneer, and medicinal materials.

The gas collection system uses activated carbon tubes to adsorb gas, and the diameter of the activated carbon tubes is smaller than that of the air guide tube, and the activated carbon tubes can be replaced.

The tail of the air pump in the gas collection system collects waste gas by binding plastic bags.

A condensing device is arranged between the oven and the activated carbon tube, and the condensing pipe has an inlet and outlet water branch pipe, and the lower part of the condensing pipe is inserted into the mouth of the flat-bottomed flask.

The computer can respectively analyze and store the data signals sent by the temperature sensor and the quality sensor synchronously on the computer data processing system.

The beneficial effect of the utility model is that the improvement of the oven can not only meet the requirement of synchronous on-line detection of the quality and multi-point temperature changes of tiny substances such as wood and medicinal powder in the experimental process, but also collect the thermal decomposition temperature at the corresponding temperature at the same time. The gas generated during the process is convenient for gas composition analysis, and one of them can also be measured separately, avoiding the repeated "take-out-re-weighing" process of substances. The structure is simple and reliable, realizing intelligence and strong practicability, saving time and greatly reducing the cost of experiments.

Description of drawings

Fig. 1 is a kind of on-line detection substance heating quality, temperature and gas collection device structural representation of the utility model;

Fig. 2 is the top view of the modified oven device;

Figure 3 and Figure 4 are schematic diagrams of data transmission;

In the figure, 1-oven, 2-heater, 3-temperature control knob, 4-intelligent temperature display, 5-thermocouple, 6-electronic balance, 7-round tray, 8-wall pole, 9-thermometer, 10-air valve, 11-glass air guide tube, 12-condenser tube, 13-water inlet pipe, 14-water outlet pipe, 15-round bottom flask, 16-air guide tube, 17-activated carbon tube, 18-air guide tube, 19-air pump, 20-speed control knob, 21-exhaust air bag, 22-heat insulation layer, 23-temperature sensor, 24-quality sensor, 25-computer, 26-square tray.

Detailed ways

The utility model will be further described in detail below by combining figures and specific embodiments.

Embodiment 1, as shown in Fig. 1 and Fig. 2, a kind of on-line detection material heating quality, temperature and gas collection device of the present utility model, in the process of implementation, at first the oven (1) is transformed, respectively on the oven (1) Install a micro-substance quality detection system, a multi-point temperature detection system and a gas collection system, wherein the micro-substance quality detection system is mainly composed of an electronic balance (6), a square tray (8) and a mass sensor (23); the multi-point temperature detection system is mainly composed of It consists of an armored nickel-constantan thermocouple (5), a temperature sensor (25) and a temperature display (4). During installation, add a thermal insulation layer (22) between the electronic balance (6) and the oven (1) to avoid the influence of temperature on the weighing data of the electronic balance. The square tray (26) passes through two wall rods (8) that can move without damping. ) is welded to the circular tray (7) of the external balance and placed inside the oven to hold and dry tiny substances such as wood. The position of the upper hole of the oven (1) is different from the position of the bottom hole of the electronic balance (6) On a vertical line, this can avoid the influence of air flow on the electronic balance measurement.

Embodiment 2, as shown in Figure 1, the armored nickel-constantan thermocouple (5) of the temperature tester is located inside the oven (1), and is used to insert tiny substances such as wood and medicinal powder to measure the variation of temperature at different positions; When carrying out the synchronous test of the quality and temperature of tiny substances, the temperature indicator (4) and the electronic balance (6) should be calibrated at first, and then the samples should be put into the square tray (26) one by one. The drill bit drills holes in the wood block. The position and number of holes can be drilled according to the experimental settings. Insert the probes of the armored nickel-chromium-constantan thermocouple (5) into different holes. If it is powder, it can be directly insert. Then use the heater (2) to heat the inside of the oven, and the temperature can be adjusted according to the temperature control knob (3) on the oven.

Embodiment 3, the gas collection device shown in Figure 1 and 2, the gas outlet is controlled by a one-way gas valve (10), and the curved glass air guide tube (11) is connected by a rubber sheath between the gas valve and the condenser tube (12). ), the gas flows into the condensation pipe (12) through the air guide pipe (11), and the two branch pipes on the condensation pipe are connected to the water inlet pipe (13) and the water outlet pipe (14) respectively, so as to facilitate the condensation of moisture in the gas, and the liquefied moisture flows into In the round bottom flask (15), it plays the role of partial drying; the gas flows into the activated carbon tube (17) through the gas guide pipe (16) connected to the upper branch pipe of the round bottom flask (15), and then is pumped by the air pump (19) to make the The gas is adsorbed, and the unadsorbed gas is collected through the tail gas bag (21) on the air pump to avoid polluting the air. The activated carbon tube (17) is replaced every 10 minutes, and the corresponding temperature section is marked, and the temperature section can be read from the temperature tester.

Embodiment 4, as shown in Figures 3 and 4, is a mass change data transmission system and a temperature change data transmission system, mainly consisting of a temperature sensor (23), a mass sensor (25) and a computer (24). When the oven (1) starts to work, the quality of the sample and the internal temperature will change synchronously, and the data will be displayed by the display device and the temperature tester (4) on the electronic balance (6), and the electronic balance (6) and the temperature Add temperature sensor (23) and quality sensor (25) in the middle of tester (4) and computer (24) respectively, can convert the current signal of quality and temperature change into data signal input in computer (24), the processing software on the computer The two information will be analyzed, listed and stored synchronously, and the interval of data transmission can be set by computer. This improves data accuracy and enables intelligent testing and processing.

Claims (8)

1. An on-line detection material heating quality, temperature and gas collection device, including a heating system, a continuous quality online detection system, Five parts: multi-point temperature online detection system, gas acquisition system and data acquisition system, characterized in that, the continuous quality online detection system and multi-point temperature online detection system are respectively connected to the data acquisition system through transmission lines and arranged in the On the upper part of the heating system, the gas collection system is connected to the heating system through a glass air duct and is located on the side of the heating system; The heating system is composed of an oven, a heater installed in it, and a temperature control knob on the side; The continuous online quality detection system is composed of an electronic balance and a quality sensor connected by a transmission line. The electronic balance is fixed on the upper part of the oven through a heat insulation layer. The electronic balance is composed of a display, a circular tray, a wall bar and a square tray. The display instrument is connected to the quality sensor through the transmission line, and the square tray is located inside the oven and connected to the circular tray at the bottom of the electronic balance through the wall bar that passes through the hole on the top of the oven; The multi-point temperature on-line detection system is composed of an armored nickel-chromium-constantan thermocouple, a temperature indicator, and a temperature sensor connected by a transmission line in turn, and the armored nickel-chromium-constantan thermocouple is inserted through the hole on the upper part of the oven. inside the oven; The gas collection system is mainly composed of a glass air guide tube, a condenser tube, an activated carbon tube and an air pump. One end of the glass air guide tube is connected to the air valve on the upper part of the oven through a rubber ferrule, and the other end is connected to the upper part of the condenser tube through a rubber ferrule. Connection, the two ends of the activated carbon tube are respectively connected to the bottom branch of the condensation tube and the air pump through rubber ferrules; The data acquisition system is composed of a temperature sensor and a quality sensor connected to a computer through a transmission line. 2. The on-line detection material heating quality, temperature and gas collection device according to claim 1, characterized in that, the bottom of the electronic balance and the top of the oven all have holes with a diameter of 1.5mm, and the positions of the holes are not in a vertical direction. on-line. 3. The on-line detecting material heating quality, temperature and gas collection device according to claim 1, characterized in that the wall rod can move up and down without damping. 4. The on-line detection material heating quality, temperature and gas collection device according to claim 1, characterized in that, there are 3 pairs of armored nickel-chromium-constantan thermocouples with a diameter of 1 mm and a measurement accuracy of ±1 mm. ℃, can be inserted into wood, veneer, and medicinal materials. 5. online detection material heating quality, temperature and gas collection device according to claim 1, it is characterized in that, described gas collection system is adsorbed gas by activated carbon tube, and the diameter of activated carbon tube is less than air guide pipe diameter, and activated carbon tube can replace. 6. The online detection material heating quality, temperature and gas collection device according to claim 1, characterized in that the tail of the gas pump in the gas collection system collects waste gas by binding plastic bags. 7. The on-line detection material heating quality, temperature and gas collection device according to claim 1, characterized in that, a condensation device is arranged between the described oven and the activated carbon tube, and the water inlet and outlet branch pipes are arranged on the condensation pipe, and the bottom of the condensation pipe is Insert into the mouth of a flat-bottomed flask. 8. The on-line detection material heating quality, temperature and gas collection device according to claim 1, characterized in that, the computer can carry out synchronous analysis on the computer data processing system with the data signals delivered by the temperature sensor and the quality sensor respectively store.