Detachable small-sized open fire test device for concrete test piece

Abstract

The utility model discloses a detachable open fire test device for a small-sized concrete test piece. Comprising a heat preservation box, a test piece supporting frame clamped above the heat preservation box, a small concrete test piece placed above the test piece supporting frame, a temperature measuring assembly electrically connected with the small concrete test piece, a fire source arranged in the heat preservation box and a transmission part arranged at the bottom and connected with the heat preservation box. By adopting the technical scheme of the utility model, the fire resistance of the small-sized concrete test piece can be researched, and the test device can be flexibly assembled and disassembled according to research requirements, so that the test convenience is greatly improved, the test cost is reduced, and the test safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete fire resistance research, in particular to a detachable small concrete specimen open flame test device. Background Art

[0002] At present, the open flame test of concrete specimens is used to evaluate the reaction of concrete specimens in actual fires. In the above open flame test, the concrete specimens can be exposed to flames to observe the damage caused by combustion. Specifically, the fire resistance of concrete specimens can be evaluated based on the distance of the flame from the specimen and the heating time, combined with the damage to the specimen structure.

[0003] In the prior art, when conducting fire resistance tests on concrete specimens, a large open flame test device is usually used to test the specimens.

[0004] However, large-scale open flame test devices have the following defects when testing specimens: first, since large-scale open flame test devices are generally large in size and the test device structure is fixed, the transportation process before and after the test is quite labor-intensive; second, the test cost is high and there are safety hazards in the test. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a detachable small concrete specimen open flame test device, which can be used to study the fire resistance performance of small concrete specimens, and the test device can be flexibly assembled and disassembled according to research needs, which greatly improves the convenience of the test, reduces the test cost, and ensures the safety of the test.

[0006] The technical solution adopted by the utility model is: a detachable small concrete specimen open flame test device, characterized in that it includes: an insulation box, a specimen support frame clamped above the insulation box, the small concrete specimen placed above the specimen support frame, a temperature measuring component electrically connected to the small concrete specimen, a fire source arranged inside the insulation box, and a transmission component arranged at the bottom and connected to the insulation box.

[0007] The above-mentioned detachable small concrete specimen open flame test device is characterized in that: the insulation box includes an upper fire source insulation layer, a middle annular bottom plate, and an outer sleeve at the bottom; the fire source insulation layer, the middle annular bottom plate, and the outer sleeve at the bottom are integrally connected.

[0008] The above-mentioned detachable small concrete specimen open flame test device is characterized in that: the transmission component includes a transmission disk, an electric telescopic rod fixedly connected to the transmission disk, an inner sleeve arranged on the outer periphery of the electric telescopic rod and matching the outer sleeve, a drive motor arranged in the inner sleeve for driving the electric telescopic rod to extend and retract, a start button for starting the drive motor, and a bottom support base plate.

[0009] The above-mentioned detachable small concrete specimen open flame test device is characterized in that the inner surface of the outer sleeve has an internal thread, and the outer surface of the inner sleeve has an external thread.

[0010] The above-mentioned detachable small concrete specimen open flame test device is characterized in that the fire source insulation layer includes an outer insulation cover and insulation cotton laid on the inner wall of the insulation cover.

[0011] The above-mentioned detachable small concrete specimen open flame test device is characterized in that the temperature measuring component is installed on the fire-exposed surface of the small concrete specimen.

[0012] The beneficial effect reasoning analysis is as follows:

[0013] The beneficial effects are inferred as follows:

[0014] In the prior art, large-scale open flame test devices have the following defects when testing specimens: first, since large-scale open flame test devices are generally large in size and the test device structure is fixed, the transportation process before and after the test is quite labor-intensive; second, the test cost is high and there are safety hazards in the test.

[0015] In the technical solution of the utility model, the transmission component can push the fire source in the insulation box to move upward to a suitable distance from the small concrete specimen. The fire source can heat the small concrete specimen for a certain period of time. The temperature measuring component electrically connected to the small concrete specimen can record the heating time and display the real-time temperature of the small concrete specimen, so that whether the test meets the temperature rise curve in the standard ISO-834 can be analyzed based on the distance, the heated specimen, and the temperature.

[0016] Since the transmission component is connected to the insulated box, the fire source is placed inside the insulated box, the insulated box is electrically connected to the temperature measuring component, the test support frame is clamped on the upper part of the insulated box, and the small concrete specimen is placed on the specimen support frame. When conducting a fire resistance study on a small concrete specimen based on the above connection method, the test device can be flexibly assembled and disassembled according to research needs, which greatly improves the convenience of the test, reduces the test cost, and ensures the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A structural diagram of a detachable open flame test device for a small concrete specimen provided by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the longitudinal section of the middle insulation layer.

[0019] Description of reference numerals:

[0020] Insulation box 1; specimen support frame 2; small concrete specimen 3;

[0021] Temperature measuring component 4; fire source 5; transmission component 6;

[0022] Fire source insulation layer 11; annular bottom plate 12; outer sleeve 13;

[0023] Insulation cover 111; insulation cotton 112; fire-exposed surface 31;

[0024] Transmission plate 61; electric telescopic rod 62; inner sleeve 63;

[0025] Driving motor 64; starting button 641; bottom supporting base plate 65. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the embodiments and drawings. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention, that is, the features of the embodiments, can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] In the prior art, large-scale open flame test devices have the following defects when testing specimens: first, since large-scale open flame test devices are generally large in size and the test device structure is fixed, the transportation process before and after the test is quite labor-intensive; second, the test cost is high and there are safety hazards in the test.

[0029] Based on this, the embodiment of the utility model provides a detachable small concrete specimen open flame test device, which can be flexibly assembled and disassembled according to research needs, greatly improving the convenience of the test, reducing the test cost, and ensuring the safety of the test.

[0030] Figure 1 A structural diagram of a detachable open flame test device for a small concrete specimen provided by the utility model. Figure 2 for Figure 1 Schematic diagram of the longitudinal section of the middle insulation layer.

[0031] See also Figure 1 and Figure 2 The detachable open flame test device includes: an insulation box 1, a specimen support frame 2 clamped on the insulation box 1, a small concrete specimen 3 placed on the specimen support frame 2, a temperature measuring component 4 electrically connected to the small concrete specimen 3, a fire source 5 arranged inside the insulation box 1, and a transmission component 6 arranged at the bottom and connected to the insulation box 1.

[0032] The heat preservation box 1 is used to store the heat generated by the fire source 5 in the box to avoid the deviation of the test results due to heat loss. Since the purpose of the utility model is to study the fire resistance of the small concrete specimen 3, when the heat generated by the flame of the fire source 5 is concentrated on the small concrete specimen 3, the test results will be more accurate. Exemplarily, the heat preservation box 1 can be a plexiglass tube, and the fire source 5 can be an alcohol lamp or an alcohol blowtorch.

[0033] The specimen support frame 2 is used to provide support force for the small concrete specimen 3, so that the small concrete specimen 3 can be stably placed on the specimen support frame 2, thereby completing the fire resistance test of the small concrete specimen 3 well.

[0034] The temperature measuring component 4 is used to measure the temperature of the small concrete specimen 3 when the flame of the fire source 5 bakes the small concrete specimen 3. For example, the temperature measuring component can be a TA612C K / J type thermocouple thermometer, the maximum measurement temperature value of which is 750°C, and the temperature measurement range of the thermometer can be selected based on the test temperature of the small concrete specimen 3. Since the small concrete specimen 3 is electrically connected to the temperature measuring component, for example, it can be specifically connected through a HK-24K type high temperature test line.

[0035] The transmission component 6 is used to push the fire source 5 in the heat preservation box 1 upward to a suitable position with the small concrete specimen 3, so as to complete the fire resistance test of the small concrete specimen 3. For example, the transmission component 6 controls the distance between the fire source 5 and the small concrete specimen 3, and heats the small concrete specimen 3 for a certain time at the distance, so as to achieve the purpose of controlling the temperature of the small concrete specimen 3. Exemplarily, the transmission component 6 can be a SWL0.5T lifting platform, or an electric telescopic rod driven by a motor.

[0036] It can be understood that the temperature control range for the specimen 3 can be determined based on the temperature rise curve in the standard ISO-834, and the specimen can be tested based on the distance and heating time corresponding to the temperature control range, that is, the distance between the fire source 5 and the specimen 3, and the heating time are adjusted to achieve control of the temperature of the specimen 3.

[0037] The beneficial effects are inferred as follows:

[0038] In the prior art, large-scale open flame test devices have the following defects when testing specimens: first, since large-scale open flame test devices are generally large in size and the test device structure is fixed, the transportation process before and after the test is quite labor-intensive; second, the test cost is high and there are safety hazards in the test.

[0039] In the technical solution of the present invention, the transmission component 6 can push the fire source 5 in the insulation box 1 to move upward to a suitable distance from the small concrete specimen 3. The fire source 5 can heat the small concrete specimen 3 for a certain period of time. The temperature measuring component 4 electrically connected to the small concrete specimen 3 can record the heating time and display the real-time temperature of the small concrete specimen 3, so that whether the test meets the temperature rise curve in the standard ISO-834 can be analyzed based on the distance, the heated specimen, and the temperature.

[0040] Since the transmission component 6 is connected to the heat preservation box 1, the fire source 5 is placed inside the heat preservation box 1, the heat preservation box 1 is electrically connected to the temperature measuring component 4, the test support frame 2 is clamped on the upper part of the heat preservation box 1, and the small concrete specimen 3 is placed on the specimen support frame 2. When the fire resistance performance of the small concrete specimen 3 is studied based on the above connection method, the test device can be flexibly assembled and disassembled according to the research needs, which greatly improves the convenience of the test, reduces the test cost, and ensures the safety of the test.

[0041] Continue to see Figure 1 and Figure 2 The heat preservation box 1 includes an upper fire source heat preservation layer 11, a middle annular bottom plate 12, and a bottom outer sleeve 13; the fire source heat preservation layer 11, the middle annular bottom plate 12, and the bottom outer sleeve 13 are integrally connected.

[0042] Among them, the fire source insulation layer 11 is used to concentrate the heat of the fire source 5 set in the insulation box 1, the annular bottom plate 12 is used to place the fire source 5, and the outer sleeve 13 is used to connect with the transmission component 6. For example, it can be a snap-fit ​​connection or a threaded connection to ensure that the insulation box 1 and the transmission component 6 are firmly connected.

[0043] Continue to see Figure 1 The transmission component 6 includes a transmission disk 61, an electric telescopic rod 62 fixedly connected to the transmission disk 61, an inner sleeve 63 arranged on the outer periphery of the electric telescopic rod 62 and matching the outer sleeve 13, a driving motor 64 arranged in the inner sleeve 63 for driving the electric telescopic rod 62 to extend and retract, a start button 641 for starting the driving motor 64, and a bottom supporting base plate 65.

[0044] The transmission disc 61 is used to lift or push the fire source 5 placed on the annular bottom plate 12, so that the fire source 5 approaches the direction of the small concrete specimen, thereby heating the small concrete specimen.

[0045] The electric telescopic rod 62 can be extended in the vertical direction. Since the transmission disc 61 and the electric telescopic rod 62 are fixedly connected, when the electric telescopic rod 62 is extended, the transmission disc 61 and the electric telescopic rod 62 are relatively stationary, but the distance between the transmission disc 61 and the small concrete specimen is reduced.

[0046] It can be understood that the electric telescopic rod 62 is disposed in the inner sleeve 63 , and the upper end of the electric telescopic rod 62 passes through the inner sleeve 63 and is fixedly connected to the transmission disc 61 .

[0047] The connection between the outer sleeve 13 and the inner sleeve 63 can be a snap-fit ​​or threaded connection. After the connection, the inner sleeve 63 can provide a stable supporting force for the outer sleeve 13, ensuring that the fire resistance test of the small concrete specimen can be carried out smoothly.

[0048] Exemplarily, when the connection method is a threaded connection, the inner surface of the outer sleeve 13 has an internal thread, and the outer surface of the inner sleeve 63 has an external thread.

[0049] The driving motor 64 is used to drive the electric telescopic rod 62 to extend or shorten along the vertical direction. When the electric telescopic rod 62 extends, the transmission plate 61 fixedly connected to the electric telescopic rod 62 can move upward.

[0050] The start button 641 is used to start the drive motor 64 to start working.

[0051] The bottom support base plate 65 is used to provide stable support for the above-mentioned components.

[0052] See also Figure 2 The fire source insulation layer 11 includes an outer insulation cover 111 and insulation cotton 112 laid on the inner wall of the insulation cover 111 .

[0053] The heat-insulating cover 111 concentrates the heat of the fire source 5, and the heat-insulating cotton 112 is used to further reduce the heat loss. For example, the heat-insulating cover 111 can be a plexiglass tube, and the heat-insulating cotton 112 can be a high-temperature resistant cotton felt of aluminum silicate needle-punched blanket covered with aluminum foil, and the thickness of the cotton felt can be 50 mm. In a specific implementation, the cotton felt can be evenly attached to the inner wall of the plexiglass tube to form a closed heat-insulating environment, thereby forming the fire source heat-insulating layer 11.

[0054] Specifically, the temperature measuring component 4 is installed on the fire-exposed surface 31 of the small concrete specimen 3 .

[0055] The fire source 5 heats a part of the small concrete specimen 3 , which is the fire-receiving surface 31 , and the temperature measuring component 4 reads the temperature of the above-mentioned part.

[0056] The utility model provides a scheme of a detachable open flame test device for a small concrete specimen during use, and the scheme comprises the following steps:

[0057] Step S1, threading the inner thread of the outer sleeve 13 of the heat preservation box 1 and the inner thread of the inner sleeve 63 of the transmission component 6, and threading the heat preservation box 1 and the transmission component 6 together.

[0058] Step S2: Place the fire source 5 into the heat preservation box 1 from the top, and then ignite the fire source 5.

[0059] Step S3 , clamping the specimen support frame 2 on the upper part of the heat preservation box 1 , and placing the small concrete specimen 3 on the specimen support frame 2 .

[0060] Step S4, the driving motor 64 drives the electric telescopic rod 62 to extend its length. When the transmission disc 61 contacts the bottom of the fire source 5, the transmission disc 61 will continue to move upward against the fire source 5 until it reaches the test distance between the small concrete specimen 3.

[0061] Step S5, during the process of the flame of the fire source 5 heating the small concrete specimen 3, the temperature measuring component 4 can read the real-time temperature of the small concrete specimen 3 and record the heating time corresponding to the real-time temperature.

[0062] Step S6, the computer device electrically connected to the temperature measuring component 4 can read multiple sets of temperatures and heating times, and then draw a three-dimensional curve graph in combination with the extension distance of the electric telescopic rod 62. By comparing the above three-dimensional curve graph with the temperature rise curve in the standard ISO-834, the accuracy of the test results is evaluated.

[0063] Step S7: After the test is finished, the fire source is extinguished by using the lamp cap of the fire source 5, and the detachable small concrete specimen test device is disassembled and stored.

[0064] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A detachable small concrete specimen open flame test device, characterized in that: include: An insulation box (1), a specimen support frame (2) clamped on the insulation box (1), the small concrete specimen (3) placed on the specimen support frame (2), a temperature measurement component (4) electrically connected to the small concrete specimen (3), a fire source (5) arranged inside the insulation box (1), and a transmission component (6) arranged at the bottom and connected to the insulation box (1).

2. A detachable small concrete specimen open flame test device according to claim 1, characterized in that: The heat preservation box (1) comprises an upper fire source heat preservation layer (11), a middle annular bottom plate (12), and a bottom outer sleeve (13); the fire source heat preservation layer (11), the middle annular bottom plate (12), and the bottom outer sleeve (13) are integrally connected.

3. A detachable small concrete specimen open flame test device according to claim 2, characterized in that: The transmission component (6) comprises a transmission disc (61), an electric telescopic rod (62) fixedly connected to the transmission disc (61), an inner sleeve (63) arranged on the outer periphery of the electric telescopic rod (62) and matching the outer sleeve (13), a drive motor (64) arranged in the inner sleeve (63) for driving the electric telescopic rod (62) to extend and retract, a start button (641) for starting the drive motor (64), and a bottom support base plate (65).

4. A detachable small concrete specimen open flame test device according to claim 3, characterized in that: The inner surface of the outer sleeve (13) has an internal thread, and the outer surface of the inner sleeve (63) has an external thread.

5. A detachable small concrete specimen open flame test device according to claim 2, characterized in that: The fire source heat-insulating layer (11) comprises a heat-insulating cover (111) on the outer periphery and heat-insulating cotton (112) laid on the inner wall of the heat-insulating cover (111).

6. A detachable small concrete specimen open flame test device according to claim 1, characterized in that: The temperature measuring component (4) is installed on the fire-exposed surface (31) of the small concrete specimen (3).

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