CN215766471U - Small-size test furnace - Google Patents

Abstract

The utility model discloses a small-sized test furnace, which comprises a furnace body, wherein a furnace door is arranged on the furnace body, a window is arranged on the furnace door, an electric heating carbon rod and a temperature sensor are arranged inside the furnace body, a fire spraying pipe is arranged on the side wall of the furnace body, the first end of the fire spraying pipe penetrates through the side wall of the furnace body and extends into the furnace body, an igniter is arranged at the first end of the furnace body, a fuel pipe is communicated with the second end of the fire spraying pipe, and an adjusting valve is arranged on the fuel pipe. The fuel pipe and the gas injection pipe are respectively used for injecting fuel and air into the flame-throwing pipe and mixing the fuel and the air, and then the mixed gas is ignited by the igniter and sprayed into the furnace body, so that the temperature in the test furnace at the initial stage of the test can be quickly raised, the temperature in the test furnace can be in accordance with the test standard temperature, and the accuracy of the paint test is improved.

Description

Small-size test furnace

Technical Field

The utility model belongs to the technical field of paint coating testing, and particularly relates to a small-sized test furnace.

Background

The most common small-size test device of current fire prevention coating is the small-size test stove that adopts the heating carbon-point as the heat source, because the initial stage programming rate of electrical heating carbon-point is more linear, and the programming rate of earlier stage in the standard programming curve of requirement is very fast, the standard temperature deviation that leads to ten minutes's in-furnace programming rate and conflagration is very big, lead to analog temperature and whole experimental precision to appear the deviation, simultaneously because the limitation of electric heat carbon-point and other electric heating means, even lead to under the condition of very big current, the programming rate is still slow in the initial stage in-furnace, test result and reproducibility have been influenced, and big current very easily leads to carbon-point oxidation ablation, the carbon-point is short in life-span and fragile.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a small-sized test furnace to solve the technical problems that the temperature rise rate in the furnace at the initial stage of the existing coating test furnace is slow, and the accuracy and the reproducibility of a test result are influenced.

In order to achieve the purpose, the specific technical scheme of the small-sized test furnace is as follows:

the utility model provides a small-size experimental stove, includes the furnace body, install the furnace gate on the furnace body, be provided with the window on the furnace gate, inside electric heat carbon-point and the temperature sensor of being provided with of furnace body, be provided with the flame projecting pipe on the lateral wall of furnace body, the first end of flame projecting pipe runs through the lateral wall of furnace body and extends to inside the furnace body, be provided with some firearm on the first end of furnace body, the second of flame projecting pipe is served and is communicate there is the fuel pipe, install the governing valve on the fuel pipe.

Preferably, in order to provide sufficient lift in the flame tube and to improve the intensity of the flame sprayed from the flame tube, a gas injection tube is connected to the flame tube.

Preferably, in order to make the injection direction of the gas injection pipe consistent with the injection direction of the flame spraying pipe and to extend the flame spraying distance of the flame spraying pipe, the gas injection pipe and the flame spraying pipe are coaxially arranged, a first end of the gas injection pipe extends into the flame spraying pipe, a gap is formed between the outer side wall of the gas injection pipe and the inner side wall of the flame spraying pipe, and a second end of the gas injection pipe is hermetically connected with a second end of the flame spraying pipe.

Preferably, in order to increase the temperature of the flame sprayed by the flame spraying tube, a vortex tube is arranged on the gas injection tube, and a hot gas flow output end of the vortex tube is communicated with a first end of the gas injection tube.

Preferably, in order to uniformly mix the fuel pipe with the air in the gas injection pipe after the fuel pipe enters the flame tube, the fuel pipe is distributed along a tangential direction of the flame tube.

Preferably, in order to rapidly cool the paint sample after the test is finished and improve the safety of the test furnace, a cooling box is arranged at the bottom of one side of the furnace door, which is close to the furnace body, the top of the cooling box is open, and the cold airflow output end of the vortex tube is communicated with the inside of the cooling box through an air conveying pipe.

Preferably, in order to improve the environmental protection performance of the test furnace, a purifier is arranged at the top of the furnace body and is communicated with the interior of the furnace body through a flue.

Preferably, in order to improve the convenience of taking and placing the test board, a support is arranged in the furnace body, and the support is detachably connected with the test board.

Preferably, in order to enable the test furnace to test a plurality of samples simultaneously and improve the test precision, a plurality of hooks are uniformly distributed on the support, through holes are formed in the top of the test board, and the test board is hung on the hooks through the through holes.

Preferably, in order to reduce heat loss in the test furnace and improve the test effect of the test furnace, the inner walls of the furnace body and the furnace door are both covered with heat insulation materials.

The small-sized test furnace has the following advantages: the fuel pipe and the gas injection pipe are respectively used for injecting fuel and air into the flame-throwing pipe and mixing the fuel and the air, and then the mixed gas is ignited by the igniter and then sprayed into the furnace body, so that the temperature in the test furnace at the initial stage of the test can be quickly raised, the temperature in the test furnace can be in accordance with the test standard temperature, and the accuracy of the paint test is improved.

Drawings

FIG. 1 is a schematic view of a small test furnace according to the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the connection structure of the flame injection pipe, the gas injection pipe and the fuel pipe according to the present invention;

FIG. 4 is a schematic view of a mounting structure of the test board according to the present invention;

the notation in the figure is: 1. a gas delivery pipe; 2. a vortex tube; 3. a flame spraying pipe; 4. a fuel tube; 5. a flue; 6. a purifier; 7. a test board; 8. a window; 9. a furnace door; 10. a furnace body; 11. a cooling tank; 12. a gas injection pipe; 13. a support; 14. an electric carbon rod; 15. adjusting a valve; 16. an igniter; 17. a through hole; 18. hooking; 19. a temperature sensor.

Detailed Description

In order to better understand the purpose, structure and function of the utility model, a small test oven of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in figures 1-4, a small-sized test furnace comprises a furnace body 10, a furnace door 9 is installed on the furnace body 10, the inner walls of the furnace body 10 and the furnace door 9 are covered with heat insulation materials to slow down the loss of heat in the test furnace and reduce the energy consumption of the test furnace, a purifier 6 is arranged at the top of the furnace body 10, the purifier 6 is communicated with the interior of the furnace body 10 through a flue 5, flue gas generated in the test furnace enters the purifier 6 through the flue 5 to realize purification, the emission of the flue gas of the test furnace is reduced, the environmental protection performance of the test furnace is improved, a window 8 is arranged on the furnace door 9, the change of paint in the test furnace can be observed in real time through the window 8, an electric heating carbon rod 14 and a temperature sensor 19 are arranged in the furnace body 10, the temperature rise in the test furnace is realized through the electric heating carbon rod 14, but when the test furnace is actually used, the initial temperature rise in the furnace body 10 is slow due to the limitation of the electric heating carbon rod 14, the side wall of the furnace body 10 is provided with a flame-spraying pipe 3, a first end of the flame-spraying pipe 3 penetrates through the side wall of the furnace body 10 and extends into the furnace body 10, the first end of the furnace body 10 is provided with an igniter 16, a second end of the flame-spraying pipe 3 is communicated with a fuel pipe 4, the fuel pipe 4 is distributed along the tangential direction of the flame-spraying pipe 3, the fuel pipe 4 is provided with a regulating valve 15 for regulating the supply amount of fuel to control the flame intensity, the flame-spraying pipe 3 is communicated with a gas injection pipe 12, the gas injection pipe 12 is coaxially arranged with the flame-spraying pipe 3, the first end of the gas injection pipe 12 extends into the flame-spraying pipe 3, a gap exists between the outer side wall of the gas injection pipe 12 and the inner side wall of the flame-spraying pipe 3, the second end of the gas injection pipe 12 is hermetically connected with the second end of the flame-spraying pipe 3, the gas injection pipe 12 is provided with a vortex pipe 2, and compressed air is injected into the gas inlet end of the vortex pipe 2, high-temperature air can be output at the hot air flow output end of the vortex tube 2, low-temperature air can be output at the cold air flow output end of the vortex tube 2, and the hot air flow output end of the vortex tube 2 is communicated with the first end of the gas injection tube 12.

When the test furnace is used, a paint sample is placed inside the furnace body 10, at the initial stage of the test, compressed air enters the vortex tube 2 through the air inlet end of the vortex tube 2, high-temperature air enters the air injection tube 12 through the cold air flow output end of the vortex tube 2, then is injected into the flame-spraying tube 3 through the air injection tube 12, simultaneously, after entering the flame-spraying tube 3 along the tangential direction, the fuel tube 4 rotates inside the flame-spraying tube 3 to mix the fuel with the high-temperature air and realize preheating, then the mixed air is injected into the furnace body 10 from the flame-spraying tube 3, meanwhile, the mixed air is ignited through the igniter 16, so that flame is injected into the furnace body 10 from the flame-spraying tube 3, the high-temperature air in the air injection tube 12 is injected along the tangential direction of the flame-spraying tube 3, the flame-spraying distance of the flame-spraying tube 3 can be prolonged, meanwhile, the high-temperature air provided by the vortex tube 2 can realize preheating, the flame temperature is improved, and the flame sprayed by the flame-spraying tube 3 cooperates with the electric heating carbon rod 14, the temperature in the furnace body 10 can be quickly raised in the initial stage of the test, the temperature rising rate in the initial stage is accelerated, the temperature in the furnace body 10 keeps approximately consistent with a standard curve in the whole test process, and the accuracy of the paint test is improved.

When using test furnace test coating fire resistance, the accuracy of the result that obtains through the single test is relatively poor to temperature is higher during the test, and the inconvenient security that will reduce test furnace and use of operation, be provided with support 13 in the furnace body 10, evenly distributed has six couples 18 on the support 13, and two through holes 17 have been seted up at the top of testing board 7, will test board 7 through hole 17 and hang on couple 18. Six couples 18 on support 13 can once hang three test panel 7, scribbles the examination of awaiting measuring coating on test panel 7, can the single acquire three test data, improves efficiency of software testing, and the contrast through a plurality of data can improve the degree of accuracy of test simultaneously, secondly, will survey test panel 7 through hole 17 and hang on couple 18, can improve the convenience that test panel 7 got and put, when the test of high temperature test furnace, can improve the security of operation greatly.

After the test is accomplished, survey test panel 7 temperature and high, there is the potential safety hazard, and the bottom of the neighbouring furnace gate 9 of furnace body 10 one side is provided with cooler bin 11, and the uncovered setting in cooler bin 11 top, vortex tube 2's cold air current output end passes through gas-supply pipe 1 and the inside intercommunication of cooler bin 11. The test board 7 is placed in the cooling box 11 after being taken out of the furnace body 10, and low-temperature air output by the cold airflow output end of the vortex tube 2 is sent into the cooling box 11, so that the temperature in the cooling box 11 can be reduced, the test board 7 can be quickly cooled, and potential safety hazards are reduced.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. The utility model provides a small-size experimental stove, includes furnace body (10), install furnace gate (9) on furnace body (10), be provided with window (8) on furnace gate (9), furnace body (10) inside electric heat carbon-point (14) and temperature sensor (19), its characterized in that of being provided with:

the side wall of the furnace body (10) is provided with a fire spraying pipe (3), the first end of the fire spraying pipe (3) penetrates through the side wall of the furnace body (10) and extends into the furnace body (10), the first end of the furnace body (10) is provided with an igniter (16), the second end of the fire spraying pipe (3) is communicated with a fuel pipe (4), and the fuel pipe (4) is provided with a regulating valve (15).

2. The small test oven according to claim 1, characterized in that the flame-injecting pipe (3) is connected with a gas-injecting pipe (12).

3. The small scale test furnace according to claim 2, wherein the gas injection pipe (12) is coaxially arranged with the flame tube (3), a first end of the gas injection pipe (12) extends into the flame tube (3), a gap exists between an outer sidewall of the gas injection pipe (12) and an inner sidewall of the flame tube (3), and a second end of the gas injection pipe (12) and a second end of the flame tube (3) are hermetically connected.

4. The bench scale of claim 3, characterized in that the gas injection pipe (12) is provided with a vortex tube (2), and a hot gas flow output end of the vortex tube (2) is communicated with a first end of the gas injection pipe (12).

5. The bench-top oven according to claim 2, characterized in that the fuel pipes (4) are distributed tangentially to the flame lances (3).

6. The small test oven according to claim 4, characterized in that a cooling box (11) is arranged at the bottom of one side of the oven body (10) close to the oven door (9), the top of the cooling box (11) is open, and the cold air flow output end of the vortex tube (2) is communicated with the inside of the cooling box (11) through an air delivery pipe (1).

7. The small test oven according to claim 2, characterized in that a purifier (6) is provided on the top of the oven body (10), the purifier (6) communicating with the inside of the oven body (10) through a flue (5).

8. The small test oven according to claim 1 or 2, characterized in that a support (13) is arranged in the oven body (10), and a test board (7) is detachably connected to the support (13).

9. The small test oven according to claim 8, characterized in that a plurality of hooks (18) are uniformly distributed on the bracket (13), a through hole (17) is formed in the top of the test board (7), and the test board (7) is hung on the hooks (18) through the through hole (17).

10. The small test oven according to claim 1, characterized in that the inner walls of the oven body (10) and the oven door (9) are covered with a heat insulating material.

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