CN204925839U - Burning test heating device - Google Patents

Abstract

A combustion test heating device, including a heating box and a sample box, wherein the heating device also includes a temperature control system that can precisely control the temperature rise process, the heating box adopts a box structure with an open top, and the sample box is located above the heating box , the heating box is equipped with a heating tube and a temperature sensor. The temperature control system includes a control box, an operation panel and an electrical circuit installed in the control box. The electrical circuit includes a relay and a temperature controller. The input end of the relay is used to electrically connect an external power supply. , the output end of the relay is electrically connected to the heating tube, the input end of the temperature controller is electrically connected to the temperature sensor, the output end of the temperature controller is electrically connected to the relay, the operation panel is provided with an input interface of the temperature controller, and the input interface of the temperature controller is connected to the temperature The controller is electrically connected. The utility model has the advantages of not only being able to heat combustibles, but also precisely controlling the temperature rise process, and further grasping the evolution characteristics of the entire combustion process.

Description

A combustion test heating device

Technical field:

The utility model relates to the field of combustion test equipment, in particular to a heating device for a combustible material combustion test.

Background technique:

When studying the fire characteristics of combustibles, it is necessary to conduct heating and temperature-rising experiments on combustibles in order to grasp the evolution characteristics of the entire combustion process. At present, the fire test heating device generally uses a simple electric furnace for heating. During the test, the temperature of the electric furnace is uncontrollable, and it is difficult to meet the needs of precise temperature rise, and the resistance wire of the electric furnace is easily caused by burning pollutants. Problems such as short circuit and fusing.

Utility model content:

The technical problem to be solved by the utility model is to provide a combustion test heating device that can not only heat combustibles, but also precisely control the temperature rise process, and then grasp the evolution characteristics of the entire combustion process.

The technical solution of the utility model is to provide a combustion test heating device with the following structure, which includes a heating box and a sample box, wherein the heating device also includes a temperature control system that can accurately control the temperature rise process, the heating box A box-type structure with an open top is adopted, the sample box is located above the heating box, and a heating tube and a temperature sensor are arranged in the heating box, and both the heating tube and the temperature sensor are electrically connected to the temperature control system.

After adopting the above structure, compared with the prior art, the utility model has the beneficial effect that: when in use, the combustible test sample material can be placed in the sample box, the sample box is placed on the top of the heating box, and the temperature is set by the temperature control system. Heating the predetermined temperature, the temperature sensor in the heating box feedbacks the actual temperature and the set temperature comparison, the temperature controller accurately controls the heating tube to energize and generate heat according to the temperature difference signal, so that the actual temperature reaches the predetermined target, completes the heating process, and then grasps the evolution characteristics of the entire combustion process .

A combustion test heating device described in the utility model, wherein the temperature control system includes a control box, an operation panel and an electrical circuit arranged in the control box, the electrical circuit includes a relay and a temperature controller, and the input end of the relay is used to connect External power supply, the output of the relay is electrically connected to the heating tube, the input end of the temperature controller is electrically connected to the temperature sensor, the output end of the temperature controller is electrically connected to the relay, and the temperature controller input interface is provided on the operation panel, and the temperature controller input interface is connected to the The temperature controller is electrically connected.

As an improvement, a combustion test heating device described in the utility model, wherein an AC contactor and an overcurrent protection switch are connected in series between the input end of the relay and the external power supply, and the AC contactor is electrically connected to a start-stop button, The start-stop button is set on the control panel. The function of the start-stop button and the AC contactor is to control the on-off of the power supply. The function of the overcurrent protection switch is to prevent short circuit caused by failure of heating device.

As an improvement, in the combustion test heating device described in the utility model, the metal casing of the temperature controller is electrically connected to the ground wire of the external power supply. It is a kind of grounding protection to connect the metal shell of the thermostat with the ground wire of the external power supply, and the purpose is to prevent electric leakage from hurting people.

As an improvement, a combustion test heating device described in the utility model, wherein, the inner side and the bottom of the heating box are arranged with high-temperature-resistant insulating and heat-shielding panels. The function of arranging high-temperature-resistant insulating heat shields is to prevent electric leakage and heat loss in the heating box.

As an improvement, the combustion test heating device described in the utility model, wherein the side of the heating box is provided with a hinged opening and closing panel. The setting of the hinged opening and closing panel is convenient for people to open the panel to remove the pollutants inside the heating box.

As an improvement, a combustion test heating device described in the utility model, wherein, a support leg is provided under the heating box, and a heat-insulating pad is installed at the bottom of the support leg. The supporting legs can not only be used to support the heating box body, but also can prevent the heating box body from directly contacting the ground, and the setting of the heat insulating pad can better prevent electric leakage.

As an improvement, a heating device for a combustion test described in the utility model, wherein the top of the sample box is provided with a metal grid cover. The function of the metal grid cover plate is to prevent the test sample material from overflowing and falling off during the heating process.

As an improvement, a heating device for a combustion test described in the utility model, wherein metal handles are provided on both sides of the sample box. The metal handle is easy for people to operate.

Description of drawings:

Fig. 1 is the overall structure schematic diagram of a kind of combustion test heating device of the present utility model;

Fig. 2 is a schematic cross-sectional view of a heating box in a combustion test heating device of the present invention;

Fig. 3 is a schematic diagram of the internal structure of the temperature control system in a combustion test heating device of the present invention;

Fig. 4 is a block diagram of the working principle of a combustion test heating device of the present invention.

Detailed ways:

A combustion test heating device of the present utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

As shown in FIG. 1 , the combustion test heating device of the present invention includes a heating box 1 , a sample box 2 and a temperature control system that can precisely control the temperature rise process. The sample box 2 is located above the heating box 1 . As shown in Figures 1 and 2, the heating box 1 adopts a box-type structure with an open top, and the inner side and bottom surface of the heating box 1 are arranged with high-temperature-resistant insulation and heat insulation panels 13, and the side of the heating box 1 is provided with hinged opening and closing panels 14 , Four support legs 19 are arranged below the heating box 1, and heat insulation pads 15 are installed on the bottom of the four support legs 19. Heating box 1 casing and supporting foot 19 all are made of metal material. The heating box 1 is provided with a heating tube 3 and a temperature sensor 4. The heating tube 3 is made of metal with a maximum power of 1.8kW. Inside the box, the maximum heating temperature can reach 700°C. The temperature sensor 4 is a thermocouple type and is installed above the heating pipe 3 . The sample box 2 is a square box tray, made of metal material, and used to hold the samples to be heated for testing. During the heating test, the sample box 2 is placed above the heating box 1 . The top of the sample box 2 has a metal mesh cover plate 16, and the sample box 2 has metal handles 17 on both sides.

As shown in FIGS. 1 and 3 , the temperature control system includes a control box 5 , an operation panel 6 and an electrical circuit arranged in the control box 5 . The electrical circuit includes an overcurrent protection switch 11, an AC contactor 10, a relay 7 and a temperature controller 8. One end of the current protection switch 11 is used to electrically connect to an external power supply, and the other end is electrically connected to one end of the AC contactor 10. The AC contactor The other end of 10 is electrically connected to the input end of the relay 7, and the output end of the relay 7 is electrically connected to the heating tube 3. The input end of the temperature controller 8 is electrically connected to the temperature sensor 4 , and the output end of the temperature controller 8 is electrically connected to the relay 7 . The operation panel 6 is provided with a temperature controller input interface 9 and a power indicator light 18 , and the temperature controller input interface 9 is electrically connected with the temperature controller 8 . The AC contactor 10 is electrically connected with a start-stop button 12 , and the start-stop button 12 is arranged on the control panel 6 . The metal casing of the temperature controller 8 is electrically connected to the ground wire of the external power supply.

As shown in Figure 4, the working principle of a combustion test heating device of the present invention is: when in use, the combustible test sample material is placed in the sample box 2, and the sample box 2 is placed on the top of the heating box 1, and the temperature control system Set the predetermined heating temperature, the temperature sensor 4 in the heating box 1 feedbacks the actual temperature and the set temperature, and the temperature controller 8 accurately controls the heating tube 3 to energize and generate heat according to the temperature difference signal, so that the actual temperature reaches the predetermined target, completes the heating process, and then masters Evolutionary characterization of the entire combustion process.

The above-mentioned embodiment is only a description of the preferred embodiment of the present utility model, and does not limit the scope of the present utility model. Various modifications and improvements made should fall within the scope of protection determined by the claims of the utility model.

Claims (9)

1. a burning test heating arrangement, it comprises heating cabinet (1) and sample box (2), it is characterized in that: this heating arrangement also comprises the temperature control system that accurately can control temperature rise process, described heating cabinet (1) adopts open-topped case structure, described sample box (2) is positioned at the top of heating cabinet (1), be provided with heating tube (3) and temperature sensor (4) in described heating cabinet (1), described heating tube (3) and temperature sensor (4) are all electrically connected with temperature control system.

2. a kind of burning test heating arrangement according to claim 1, it is characterized in that: described temperature control system comprises control box (5), guidance panel (6) and the electric loop be arranged in control box (5), described electric loop comprises relay (7) and temperature controller (8), the input end of described relay (7) is for connecting external power supply, the output terminal of relay (7) is electrically connected with heating tube (3), input end electrical connection temperature sensor (4) of described temperature controller (8), output terminal electrical connection relay (7) of temperature controller (8), described guidance panel (6) is provided with temperature controller input interface (9), described temperature controller input interface (9) is electrically connected with temperature controller (8).

3. a kind of burning test heating arrangement according to claim 2; it is characterized in that: between the input end of described relay (7) and external power supply, be in series with A.C. contactor (10) and overcurrent protection circuit (11) successively; described A.C. contactor (10) is electrically connected with a start-stop button (12), and described start-stop button (12) is arranged on control panel (6).

4. a kind of burning test heating arrangement according to claim 2, is characterized in that: the metal shell of described temperature controller (8) is electrically connected with the ground wire of external power source.

5. a kind of burning test heating arrangement according to claim 1, is characterized in that: described heating cabinet (1) box inside face and sole arrangement have high-temperature insulation thermal insulation board (13).

6. a kind of burning test heating arrangement according to claim 1 or 5, is characterized in that: described heating cabinet (1) side is provided with hinge type folding panel (14).

7. a kind of burning test heating arrangement according to claim 6, it is characterized in that: described heating cabinet (1) below is provided with supporting leg (19), described supporting leg (19) bottom is provided with partiting thermal insulation pad (15).

8. a kind of burning test heating arrangement according to claim 1, is characterized in that: described sample box (2) top is with metal grill cover plate (16).

9. a kind of burning test heating arrangement according to claim 1 or 8, is characterized in that: described sample box (2) two sideband Matal handle (17).