A component fire protection design and fire supervision electric furnace device and use method

Abstract

The present invention provides an electric furnace device and a method for using a component fire protection design and fire supervision, S1. Determine the test scene: S2. The device is in place on site: S3. The test sample is installed: S3A, the installation steps when a cubic sample is used: S3B, the installation steps when a cylindrical sample is used: S4. Back-fire surface insulation selection: S4A, when the test sample is a cubic sample or a cylindrical sample, the insulation cover installation steps; S4B, do not use the insulation cover; S5. Furnace temperature setting preparation: S6. Control mode selection: Among them, S6A, the control test process using the control unit: S6B, the control test process using the mobile terminal: S7. The whole test process is completed: the electric furnace device and the mobile terminal are stored and saved. The present invention can simulate the real boundary relationship between the protected material and the insulation material, provide a simple and reliable equivalent temperature rise curve setting method, can quickly form a test report, and greatly improve the efficiency of supervision and law enforcement.

Description

Technical Field

[0001] The present invention relates to the fields of fire protection design of building structures, thermal insulation performance testing of fireproof materials (combined systems) and fire supervision, and specifically to an electric furnace device for component fire protection design and fire supervision and a method for using the device; the device is capable of simulating the real boundary relationship (connecting fixed boundaries and heat transfer boundaries) between a protected material (combined system) and a thermal insulation material, setting a simple equivalent temperature rise curve, being easy to study and try the effect of component fire protection (combined system), being convenient for carrying out witness experiments during on-site fire inspections and quickly forming a supervision result report. Background Art

[0002] According to the principle of passive fire protection, the current fire protection design of components mainly adopts the method of coating, wrapping and fixing the insulation material on the surface of the protected component material. The outer insulation material can be a single material or a laminate of several materials. Special structures also include the existence of a cavity between the protected component material and the insulation material, such as light steel keel hollow partition wall.

[0003] After these components with fireproof and heat-insulating materials are processed, they are fixed in the wall furnace, column furnace or beam furnace, and fire resistance tests are carried out according to the standard heating curve to obtain fire resistance limit test reports that meet different requirements and meet the needs of fire protection design, review, construction and supervision. In terms of component fire protection design methods, it is currently more at the empirical level and has not yet been able to carry out refined fire protection design. If a column component fails in 175 minutes in the standard fire resistance test, it is judged to have a second-level fire resistance rating. If it is used according to such a result, the insulation material will be wasted. If the goal is to obtain a first-level fire resistance rating (fire resistance limit reaches 3.00h), it is still necessary to re-design the fire protection of the component and send it for inspection again, incurring high testing costs. In terms of component size, the general height (length) can reach 3.0m. If the expected test results cannot be obtained at one time, the test components are made multiple times, which is a waste of time, materials, manpower and transportation costs. This is not conducive to a large number of repetitive or reproducible attempts in the development of related products and scientific research; in terms of the heating curve adopted, most fire resistance tests adopt the standard heating curve specified in GB / T9978, and a small number of special uses adopt GB / T 26784. The refractory furnaces that implement these heating curves are all jet gas furnaces, because these curves heat up quickly in the early stage and the space inside the furnace is large, and it is very difficult to meet the heating rate requirements using electric heating. However, from the perspective of structure and safety, gas furnaces can only be used as fixed equipment, and cannot meet the needs of convenient and reliable witness tests during on-site fire inspections; even for small electric furnace equipment, the heating characteristics of the standard heating curve also put forward relatively high requirements on heating (number of heating elements) and control (feedback and current response) capabilities, which inevitably increases the cost, so this difficulty can be improved by setting a simple equivalent heating curve.

[0004] The overall technical overview of the current related fields is as follows:

[0005] (1) Electric furnaces are widely used;

[0006] At present, the devices for testing and evaluating the fire resistance, high temperature resistance and thermal insulation performance of plates and fire retardant coatings are mainly divided into electric heating, flame spraying and infrared heating according to the heat source provision method (heating method). When electric heating is adopted, it mainly relies on electric furnaces. At the same time, electric furnaces are widely used in various industries, and the control, safety and energy-saving technologies are very mature. Application No.: CN201911084659.9 introduces an electric furnace device with a current typical composition, and there is also a similar application No.: CN201721644799.3. In addition, corresponding additional functions are added for different purposes. Application No.: CN201810684454.3 introduces an electric furnace base with wheels and springs to ensure the safety of the electric furnace during transportation; Application No.: CN200710053436.7 introduces an electric furnace device in which a camera is separated from the observation hole to observe and record the status of the sample during the test process to obtain its high temperature surface conditions;

[0007] (2) Mainly for fire retardant coatings, and a small number for single fire retardant panels;

[0008] In the fire resistance and thermal insulation performance test of building materials (fire retardant coatings), application number: CN200610167761.1 discloses a test electric furnace and method that can make the shape characteristics of the sample close to the back temperature-time curve during the national type inspection and medium-sized fire resistance limit beam furnace test. The furnace temperature implements the GB / T 9978 standard heating curve used for type inspection, and the thickness of the intumescent fire retardant coating applied to the steel rectangular thin plate implements the requirements of GB 14907. It also includes components such as data acquisition, program instrument, and computer; application number: CN201520084481.9 discloses a fuel furnace device for the thermal insulation efficiency test of self-built coating products for steel structure coating manufacturers, which has the characteristics of simple structure and small space. Its furnace cover has a sunken opening groove that can support the coating sample, and by covering the thermal insulation cotton, the heat loss of the back fire surface of the specimen is reduced. It also includes a collection module and a computer test display part. Analysis found that mobile fuel devices are prone to safety problems, and fuel furnaces cannot meet the needs of on-site fire supervision. At the same time, the specimen is only insulated on the back side without insulation treatment on the surrounding facades. This structural scheme is only applicable to specimens with thinner fire retardant coatings. For thicker plate-shaped specimens or combined specimens, one-dimensional heat transfer conditions cannot be formed. And the furnace cover facade material shown in the figure that contacts the surrounding facades of the coating specimen is consistent with the furnace cover top surface and the furnace body surface. It is easy to think of thin iron sheets, which will accelerate the loss of heat from the surrounding facades of the specimen; similar technology also has application number: CN201420684921.X, using a steel structure specimen coated with fire retardant coating as a test base, with the coating surface facing the furnace, and the back covered with insulation pads, and placed together in a base placement groove formed by a furnace cover with square through holes and a positioning table, and no additional insulation treatment is done on the surrounding facades of the base. At the same time, a vertical force is applied to the back of the base (insulation pad) through a weight block and a cylinder piston to simulate the load-bearing condition of a component coated with coating. This design will cause the furnace cover and furnace body to bear additional vertical pressure, posing a great challenge to the structural strength of the furnace body; Application No.: CN201721644799.3 discloses a test furnace device for placing building materials inside the furnace body to test the fire resistance.Analysis found that this test method does not distinguish between the fire-exposed and fire-proof surfaces of building materials, and is completely placed in a high-temperature environment. It is also impossible to observe the changing characteristics of material properties during the process, and it is also impossible to study one-dimensional heat transfer problems. Application No.: CN201010170539.3 published a gas-fired test furnace device for the thermal insulation performance of fire retardant coatings on the surface of concrete tunnel specimens. It is an improvement on the existing large-scale horizontal fire resistance test furnace device of national testing institutions, and has the characteristics of being immovable and the specimen specifications must be consistent and large. Application No.: CN201721661011.X published a method based on "Concrete Structure Fire Retardant Coatings" (GB 28375) and "Steel Structure Fire Retardant Coatings" (GB 14907) standard, and designed a high-temperature fire resistance test device for fire retardant coatings. Analysis found that the failure criterion for judging whether the coating has reached the fire resistance limit is lower than the national standard; it is not necessary to heat the inner cavity of the furnace to 2000℃ or higher, and even if it can be achieved, it will be expensive; the setting of air inlet is not conducive to uniform temperature in the furnace cavity, and such high-temperature air is discharged through the air outlet, which is unnecessary and difficult to achieve with general equipment components, so these designs have never been able to achieve the purpose of simulating "different furnace environments"; in terms of the installation of test samples, it is different from that in GB 14907-2012. Figure 3There is no essential difference. Only a U-shaped heat-insulating plate with a square opening in the middle is added to the back of the sample, and the opening is the same size as the square notch of the sample test bench. While the heat-insulating plate plays the role of compacting the gap between the test sample and the sample test bench, it will have an adverse effect on the expansion of the coating at the square opening and affect the temperature field inside the test sample; Application No.: CN201410352396.6 discloses a fire resistance performance test instrument and method for steel structure fire retardant coating and decorative fire retardant coating. Analysis shows that the decorative fire retardant coating component made in accordance with GB 12441-2005 is placed in the groove at the top of the furnace cavity with the coating facing the furnace cavity. The three embodiments listed propose different specifications of furnace cavity diameters. The plane shape of the decorative fire retardant coating component can be circular or square, and it can completely cover the furnace cavity, but there is obviously a gap between the vertical surface of the groove at the top of the furnace cavity (the component is smaller than the size of the plug on the lower side of the furnace cover). When applied to thicker plate specimens or combined specimens, it is impossible to form one-dimensional heat transfer conditions, just like the application number: CN201520084481.9, and multiple furnace cavities or even furnace bodies must be built to meet the requirements of different specimen specifications. In addition, there is a fiber fire or hydrocarbon fire control program, a display screen that displays theoretical or measured temperature curves, and a USB port that can export Excel tables; Application number: CN201711434084.X announced a thermal insulation performance test device for composite tile materials with specifications of 1.75m×1.75m×0.05m under simulated outdoor solar vertical irradiation and air flow conditions, in which the composite tile materials are placed in the vertical L-shaped eaves, and the horizontal end of the L-shaped eaves is connected to the outer wall of the top of the insulation box. The device of the same principle also includes application number: CN201620569006.5, etc.; application number: CN201520053281.7 discloses a device that places two samples in two sample placement grooves on the top surface of the box, heats them with infrared lamps, and evaluates the thermal insulation effects of different materials by comparing the back surface temperature of the thermal insulation material samples;

[0009] Summarizing the above related prior art, it can be found that:

[0010] (1) The simulation of the real boundary relationship between the protected material and the insulation material is not in place. In the fire resistance test of the fire retardant coating, only the surface adhesion between the fire retardant coating (thin and thick) and the protected material (steel plate) and the insulation on the back of the protected material are emphasized. No clear technical solution is proposed to form an insulating boundary on the vertical surface of the tested piece, so it is impossible to accurately simulate the one-dimensional heat transfer problem. The test of the fireproof board is the same as the surrounding boundary situation, and only single-layer boards (single-layer composite boards) are tested. There is no test on the combined protection system samples composed of "board + board" or "board + cotton" and the protected material. Naturally, it is impossible to consider the connection and fixing relationship between the multi-layer materials and the thermal resistance between the contact surfaces of each layer.

[0011] (2) The heating curve used is in line with the standard, but it has high requirements on the heating capacity and control system of the electric furnace, which limits the application of the existing large number of electric furnaces with manually set "time-temperature" step-by-step heating and insulation curves. The technical threshold is high, which means that the cost is correspondingly increased. At the same time, when the insulation material protection structure obtained from the small electric furnace test is applied to the large-sized test piece of the standard refractory furnace, it lacks reliability and is often unsafe, that is, the insulation effect obtained cannot meet the design expectations.

[0012] (3) There is no complete set of experimental equipment and usage methods that can enable relevant enterprises, research and development institutions, etc. to independently conduct "board + board" and "board + cotton (cavity)" tests on the thermal insulation effect of the protected materials.

[0013] (4) There is still a lack of technical solutions for conducting witness experiments for on-site fire inspections. Although some devices can be used, they are not designed for this purpose and are inconvenient to move and transport. Some technologies (application numbers: CN201310610330.8, CN201220055111.9) only target the physical and chemical performance parameters of intumescent fire retardant coatings or their own, and do not target the protected components or protection systems formed by the protected materials and thermal insulation materials. On the other hand, although the real-time display of test data and wired transmission between computers are taken into account, they cannot meet the needs of "on-the-spot recording (physical pictures and phenomenon description and judgment records)" at the fire inspection site to quickly form supervision result reports, and there is no complete software support. Summary of the invention

[0014] In view of the status and shortcomings of the prior art in the relevant field, the present invention provides an electric furnace device and a method of use for component fire protection design and fire supervision.

[0015] The present invention overcomes the problems in the prior art: the real boundary relationship between the protected material and the thermal insulation material is not supported by a complete technical solution, that is, the fire-retardant coating protection steel plate does not pay attention to the simulation of the vertical insulation boundary around the tested piece, the connection and fixing boundary of the tested piece in the "plate + cotton (cavity)" protection scheme (system), and the heat transfer boundary (interface thermal resistance) between the contact surfaces of each layer are not paid attention to; the use of the heating curve specified in the standard limits the use of electric furnaces that conventionally adopt a step-shaped heating and insulation curve setting method, and has high requirements on the heating capacity and control system of the electric furnace, that is, the corresponding cost is increased, and there is no simple equivalent heating curve that can improve the reliability of the expected results when the same thermal insulation structure is tested in a large-scale fire-resistant test furnace; there is no special test device and use method that allows enterprises and research and development units to use the coating method (the outer layer of the protected material is coated with fireproof board, fireproof cotton, etc.) to test the thermal insulation effect of the protected material; there is no portable hardware and software and use method suitable for on-site fire inspections to carry out thermal insulation effect witness experiments and quickly form fire supervision result reports.

[0016] The present invention can realize the real simulation of the connection fixing boundary and heat transfer boundary relationship between the protected material and the heat insulation material, especially the structural styles such as "plate + plate", "plate + cotton", "cavity" and so on in the coating method, which contain screws, caulking and other connection fixing and interface thermal resistance relationship; it provides a "two-fold line" step-shaped "time-temperature" setting method, which reduces the requirements for the heating capacity and control system of the electric furnace, so that the conventional electric furnace can have the testing capability, and increases the reliability of the same fire protection structure in the large-scale fire-resistant test furnace to obtain the same insulation effect; it provides a complete set of experimental devices and use methods for conducting thermal insulation performance tests on protected materials using the coating method for relevant enterprises and research and development units, reduces the possibility that the national monitoring agency cannot obtain a satisfactory fire resistance limit level and thus cause waste due to "one-time inspection", and improves the current situation that the relevant units cannot build expensive fire-resistant furnaces and affect scientific research and development; it supplements the dedicated and flexible hardware equipment and software and use methods for conducting on-site fire inspection witness tests on fire protection materials and structural styles, so that the sampling process can record the real situation at the first time, and has the ability to quickly form a supervision result report.

[0017] The method for reproducing the boundary relationship between the protected material and the insulation material obtained by applying the technical solution is authentic and reliable and easy to implement. The simple equivalent temperature rise curve reduces the cost of the electric furnace and the threshold for using conventional electric furnaces for testing, so that related enterprises and research and development units can have the conditions for trial production, research and development of component fire protection design, improve the success rate of "one-time inspection", provide dedicated hardware equipment and related software for on-site fire inspection witness tests, meet the needs of quickly forming fire supervision results reports, and greatly improve the efficiency of fire law enforcement.

[0018] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a component fire protection design and an electric furnace device for fire supervision, including a furnace body composed of a rectangular hollow furnace wall and a square furnace cavity bottom plate, wherein the rectangular hollow furnace wall realizes heating in the furnace cavity through a built-in heating body, and is characterized in that it also includes a control and display transmission box, a furnace cavity thermocouple, a restrained insulation component, an insulation cover, and an additional thermocouple;

[0019] The upper end of the rectangular hollow furnace wall is provided with a circle of L-shaped inward-retracted eaves, and the center of the square furnace cavity bottom plate is provided with a fixing hole;

[0020] The control display transmission box is a hollow rectangular box, a through wire hole is provided in the center of the upper surface of the control display transmission box, a display part, a control part and a cable part are provided on a side panel of the control display transmission box, and a control module, a data acquisition module and a wireless communication module are installed inside the control display transmission box;

[0021] The constrained insulation assembly is divided into a constrained insulation assembly I or a constrained insulation assembly II;

[0022] The restrained insulation assembly I is composed of a well-shaped insulation clamping grid, an insulation lateral top block, bolts, bolt caps, and an insulation filling block I;

[0023] The insulation filling block I is composed of four high-filling strip blocks and four high-filling corner blocks;

[0024] The two well-shaped heat-insulating clamping grids are arranged horizontally and spaced apart from each other. An insulation lateral top block is respectively arranged between the eight pairs of bolt plates facing each other up and down of the two well-shaped heat-insulating clamping grids. The top pressure surfaces I of the two insulation lateral top blocks located at the head and tail ends of each well-shaped inner rib of the well-shaped heat-insulating clamping grid face each other.

[0025] The screw rods of the eight bolts are respectively inserted into the bolt plate holes of the eight bolt plates of the lower well-shaped heat-insulating clamping grid and the through circular holes I of the eight heat-insulating lateral top blocks, and extend out from the bolt plate holes of the eight bolt plates of the upper well-shaped heat-insulating clamping grid, and are screwed with the eight bolt caps.

[0026] The end plate of each bolt, each bolt plate of the lower well-shaped heat-insulating clamping grid, and the lower square boss I of each heat-insulating lateral top block are in close surface contact from bottom to top, and the upper square boss I of each heat-insulating lateral top block, each bolt plate of the upper well-shaped heat-insulating clamping grid, and each bolt cap are in close surface contact from bottom to top;

[0027] A high-filling strip block is inserted into each of the four strip-shaped gap regions formed between the eight heat-insulating lateral top blocks, and a high-filling corner block is inserted into each of the four corner-shaped gap regions formed between the eight heat-insulating lateral top blocks.

[0028] The bottom surfaces of the four high-filled strip blocks, the bottom surfaces of the four high-filled corner blocks, the bottom surfaces of the eight end plates and the bottom surface of the outer insulation layer of the lower well-shaped insulation clamping grid are in the same plane;

[0029] The restrained insulation assembly II is composed of a well-shaped insulation clamping grid, an insulation lateral top frame, bolts, bolt caps, and an insulation filling block II;

[0030] The heat-insulating filling block II is composed of four short filling strip blocks and four short filling corner blocks;

[0031] The two well-shaped heat-insulating clamping grids are arranged horizontally and spaced apart from each other, and an insulation lateral top frame is arranged between the two well-shaped heat-insulating clamping grids.

[0032] The screw rods of the eight bolts are respectively inserted into the bolt plate holes of the eight bolt plates of the lower well-shaped heat-insulating clamping grid and the eight through-holes II of the heat-insulating side top frame, and extend out from the bolt plate holes of the eight bolt plates of the upper well-shaped heat-insulating clamping grid, and are screwed with the eight bolt caps.

[0033] The end plate of each bolt, each bolt plate of the lower well-shaped heat-insulating clamping grille, and each bottom square boss II of the heat-insulating lateral top frame are in close surface contact from bottom to top, and each top square boss II of the heat-insulating lateral top frame, each bolt plate of the upper well-shaped heat-insulating clamping grille, and each bolt cap are in close surface contact from bottom to top;

[0034] A short filling strip block is inserted into each of the four strip-shaped gaps formed between the eight bolt plates of the lower well-shaped heat-insulating clamping grid below the heat-insulating lateral top frame, and a short filling corner block is inserted into each of the four corner-shaped gaps formed between the eight bolt plates;

[0035] The bottom surfaces of the four short filling strips, the bottom surfaces of the four short filling corner blocks, the bottom surfaces of the eight end plates and the bottom surface of the outer insulation layer of the lower well-shaped insulation clamping grid are in the same plane;

[0036] The furnace body is fixed to the upper surface of the control display transmission box through a square furnace cavity chassis, and the fixing hole is aligned with the wire hole;

[0037] The restrained insulation component is a restrained insulation component I whose lower end is tightly embedded in an L-shaped inward-retracted eaves at the upper end of the furnace body.

[0038] The thermal insulation cover is buckled on the constrained thermal insulation component constrained thermal insulation component I, the recessed well groove on the bottom of the thermal insulation cover is aligned and buckled with the upper well-shaped thermal insulation clamping grid of the constrained thermal insulation component constrained thermal insulation component I, the eight bolt plates of the upper well-shaped thermal insulation clamping grid are vertically opposite to the eight vertical square grooves of the thermal insulation cover, the sample edge alignment line on the bottom surface of the thermal insulation cover is aligned with the inner edges of the top surfaces of the four high-filled strip blocks and the four high-filled corner blocks,

[0039] An additional thermocouple is fixed in each of the thermocouple fixing through hole Ⅰ, the thermocouple fixing through hole Ⅱ and the thermocouple fixing through hole Ⅲ of the thermal insulation cover;

[0040] Or the restrained insulation component is a restrained insulation component II whose lower end is tightly embedded in an L-shaped inward-retracted eaves at the upper end of the furnace body;

[0041] The heat-insulating cover is buckled on the restrained heat-insulating component, which is the restrained heat-insulating component II. The recessed well groove on the bottom of the heat-insulating cover is aligned and buckled with the upper well-shaped heat-insulating clamping grid of the restrained heat-insulating component, which is the restrained heat-insulating component II. The eight bolt plates of the upper well-shaped heat-insulating clamping grid are vertically opposite to the eight vertical square grooves of the heat-insulating cover. The sample edge alignment line on the bottom surface of the heat-insulating cover is tangent to the upper circumference of the sample hole of the heat-insulating lateral top frame.

[0042] An additional thermocouple is fixed in each of the thermocouple fixing through hole Ⅰ, the thermocouple fixing through hole Ⅱ and the thermocouple fixing through hole Ⅲ of the thermal insulation cover;

[0043] The control module is respectively connected to the heating body, the data acquisition module, the wireless communication module, the display unit, the control unit, and the cable unit; the furnace cavity thermocouple is vertically fixed in the fixing hole of the square furnace cavity chassis in the furnace body, and is respectively connected to the control module and the data acquisition module through the wire holes; three additional thermocouples are respectively connected to the data acquisition module through the cable unit; and the wireless communication module is wirelessly connected to the mobile terminal to realize communication.

[0044] A method for using an electric furnace device for component fire protection design and fire supervision, characterized in that the process is as follows:

[0045] S1. Determine the test scenario:

[0046] Determine the test scenario according to the application needs. S1A is a laboratory test. Commonly, the electric furnace device can be controlled by using the control and display transmission box of the electric furnace device to meet the needs. S1B is an on-site supervision test. Commonly, the electric furnace device can be controlled by using a mobile terminal to meet the needs.

[0047] S2. Place the device on site: move the electric furnace device to the site and place it in a stable position;

[0048] S3. Installation of test samples:

[0049] The test specimens can be in the shape of flat square cube specimens and cylindrical specimens;

[0050] S3A. When a cubic specimen is used, the installation steps are as follows:

[0051] The first step is to use the constrained insulation assembly I, that is, to place the cubic specimen between two well-shaped insulation clamping grids, and to place an insulation lateral top block between eight pairs of bolt plates facing each other on the two well-shaped insulation clamping grids, respectively, and the top pressure surfaces I of the eight insulation lateral top blocks are in contact with the surrounding vertical surfaces of the cubic specimen;

[0052] The second step is to insert the screw rods of eight bolts into the bolt plate holes of the eight bolt plates of the lower well-shaped thermal insulation clamping grid and the through circular holes Ⅰ of the eight thermal insulation lateral top blocks in sequence, extend from the bolt plate holes of the eight bolt plates of the upper well-shaped thermal insulation clamping grid, and screw with eight bolt caps, the end plate of each bolt, each bolt plate of the lower well-shaped thermal insulation clamping grid, and the lower square boss Ⅰ of each thermal insulation lateral top block are in close surface contact from bottom to top, the upper square boss Ⅰ of each thermal insulation lateral top block, each bolt plate of the upper well-shaped thermal insulation clamping grid, and each bolt cap are in close surface contact from bottom to top, so that the upper and lower well-shaped thermal insulation clamping grids can provide sufficient clamping force to the cubic specimen in the thickness direction, and the eight thermal insulation lateral top blocks located around the cubic specimen can provide sufficient clamping force to the cubic specimen in the horizontal plane;

[0053] Step 3: insert a high-filling strip block into each of the four strip-shaped gap areas formed between the eight insulating lateral top blocks, and insert a high-filling corner block into each of the four corner-shaped gap areas formed between the eight insulating lateral top blocks, so that the bottom surfaces of the four high-filling strip blocks, the bottom surfaces of the four high-filling corner blocks, the bottom surfaces of the eight end plates and the lower surface of the insulating layer of the lower well-shaped insulating clamping grid are in the same plane;

[0054] Step 4: tightly embed the assembly formed in steps 1 to 3 into the L-shaped inward-retracted eaves of the furnace body;

[0055] S3B: When a cylindrical specimen is used, the installation steps are as follows:

[0056] The first step is to use the constrained insulation assembly II, that is, to set an insulation lateral top frame on the well-shaped insulation clamping grid of the lower layer, set the cylindrical sample in the sample hole in the center of the insulation lateral top frame, and set another well-shaped insulation clamping grid on the insulation lateral top frame;

[0057] The second step is to insert the screw rods of eight bolts into the bolt plate holes of the eight bolt plates of the lower well-shaped thermal insulation clamping grid and the eight through-holes II of the thermal insulation lateral top frame respectively, extend from the bolt plate holes of the eight bolt plates of the upper well-shaped thermal insulation clamping grid, and screw with eight bolt caps, so that the end plate of each bolt, each bolt plate of the lower well-shaped thermal insulation clamping grid, and each bottom square boss II of the thermal insulation lateral top frame are in close face contact from bottom to top, and each top square boss II of the thermal insulation lateral top frame, each bolt plate of the upper well-shaped thermal insulation clamping grid, and each bolt cap are in close face contact from bottom to top; the upper and lower well-shaped thermal insulation clamping grids give the cylindrical specimen sufficient clamping force in the thickness direction, and the thermal insulation lateral top frame located around the cylindrical specimen gives the cylindrical specimen sufficient clamping force in the horizontal plane;

[0058] Step 3: insert a short filling strip into each of the four strip-shaped gaps formed between the eight bolt plates of the lower well-shaped heat-insulating clamping grid below the heat-insulating lateral top frame, and insert a short filling corner block into each of the four corner-shaped gaps formed between the eight bolt plates, so that the bottom surfaces of the four short filling strips, the bottom surfaces of the four short filling corner blocks, the bottom surfaces of the eight end plates and the lower surface of the outer insulation layer of the lower well-shaped heat-insulating clamping grid are in the same plane;

[0059] Step 4: tightly embed the assembly formed in steps 1 to 3 into the L-shaped inward-retracted eaves of the furnace body;

[0060] S4. Back-fire surface insulation selection: select whether to adopt adiabatic boundary conditions for the non-heating surface of the test sample, where S4A uses an insulating cover, that is, simulates adiabatic boundary conditions on the non-heating surface of the test sample, and S4B does not use an insulating cover, that is, simulates natural convection boundary conditions on the non-heating surface of the test sample;

[0061] S4A. When the sample to be tested is a cubic specimen, the steps for installing the insulation cover are as follows:

[0062] The first step is to buckle the heat-insulating cover onto the upper well-shaped heat-insulating clamping grid of the constrained heat-insulating assembly I, and align and buckle the well-shaped grooves on the bottom of the heat-insulating cover with the upper well-shaped heat-insulating clamping grid, so that the four rectangular convex surfaces and the four square convex surfaces are in contact with the upper surface of the cubic specimen and the heat-insulating filling block I;

[0063] Step 2: fix an additional thermocouple to the thermocouple fixing through hole Ⅰ, the thermocouple fixing through hole Ⅱ and the thermocouple fixing through hole Ⅲ of the thermal insulation cover respectively, so that the ends of the three additional thermocouples are in contact with the upper surface of the cubic sample, and the three additional thermocouples are connected to the data acquisition module through the cable part respectively;

[0064] When the sample to be tested is a cylindrical sample, the steps for installing the insulation cover are as follows:

[0065] The first step is to buckle the heat-insulating cover onto the upper well-shaped heat-insulating clamping grid of the constrained heat-insulating assembly II, and align and buckle the well-shaped grooves on the bottom of the heat-insulating cover with the upper well-shaped heat-insulating clamping grid, so that the four rectangular convex surfaces and the four square convex surfaces are in contact with the upper surface of the cylindrical specimen and the heat-insulating top frame;

[0066] Step 2: fix an additional thermocouple to the thermocouple fixing through hole Ⅰ, the thermocouple fixing through hole Ⅱ and the thermocouple fixing through hole Ⅲ of the thermal insulation cover respectively, so that the ends of the three additional thermocouples are in contact with the upper surface of the cylindrical sample, and the three additional thermocouples are connected to the data acquisition module through the cable part respectively;

[0067] S4B, the upper surface of the cubic specimen or cylindrical specimen is exposed to the room air except for the area that is in close contact with the lower surface of the upper well-shaped insulation clamping grid;

[0068] S5. Preparation for furnace temperature setting: According to the needs of the current test, the equivalent heating curve "temperature-time" data to be input into the control display transmission box or mobile terminal is determined by calculation. The specific preparation steps are as follows:

[0069] The first step is to determine the target fire resistance limit t=x hours (t≥2.00h);

[0070] Step 2: Select the temperature rise curve specified in GB / T 9978.1 or the "slow temperature rise curve", "hydrocarbon (HC) temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve", "tunnel fire RABT temperature rise curve" specified in GB / T 26784, and substitute time t into the corresponding "temperature-time relationship" to obtain the target temperature T;

[0071] The third step is to set the equivalent temperature rise curve according to the target fire resistance limit;

[0072] Case 1: For the selection of the heating curve specified in GB / T 9978.1 or the "slow heating curve" specified in GB / T 26784: when t=2.00h, set the control display transmission box or mobile terminal to "linearly increase the furnace temperature to the target temperature T in the furnace within 0.50h, and keep it warm until t=2.00h"; when t=3.00h, set the control display transmission box or mobile terminal to "linearly increase the furnace temperature to the target temperature T in the furnace within 1.00h, and keep it warm until t=3.00h", and both are executed by the control module after the test starts;

[0073] Case 2: For the "HC temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve" and "tunnel fire RABT temperature rise curve" specified in GB / T 26784: set "the furnace temperature rises linearly to the target temperature T in the furnace within 1.00h, and continues to keep warm for t=x hours" through the control display transmission box or mobile terminal, and let the control module execute it after the test starts;

[0074] S6. Control mode selection: According to the scenario operation test process determined in S1, S6A uses the control display transmission box; S6B uses the mobile terminal;

[0075] S6A, control test process using control display transmission box:

[0076] The first step is to start the electric furnace device by powering on the cable unit and the control unit;

[0077] Step 2: Input the prepared equivalent temperature rise curve in the "temperature-time" mode by pressing buttons on the control unit or by touching the screen on the display unit, and set the alarm threshold of each additional thermocouple connected to the cable unit;

[0078] Step 3: The control unit synchronizes the start of the test and the start of temperature data recording, and the display unit observes the real-time "temperature-time" curve of each additional thermocouple and furnace cavity thermocouple under test, the operating failure of each component, the visual prompt of the alarm threshold, and the working condition of the wireless communication module;

[0079] Step 4: The test ends or the temperature data recording ends through the control unit or display unit;

[0080] Step 5: Copy the electronic spreadsheet data recorded by the data acquisition module through the cable unit, and turn off the power to the electric furnace device;

[0081] S6B, control test process using mobile terminal:

[0082] The first step is to start the electric furnace device by powering on the cable unit and the control unit, start the wireless communication module through the control unit and observe its working status through the display unit;

[0083] Step 2: Connect the mobile terminal to the wireless communication module through wireless communication, synchronize the mobile terminal display time with the built-in objective time of the control module of the control display transmission box with one click, input the prepared equivalent temperature rise curve and set the alarm threshold of each additional thermocouple connected to the cable part in the control and setting module of the mobile terminal according to the "temperature-time" mode, enter the report generation module and input the project name, time and location, fire protection sampling information, and fire protection status description of the sample to be tested on the general information filling page;

[0084] Step 3: Synchronize the start of the test and the start of temperature data recording through the control and setting module of the mobile terminal;

[0085] Step 4: Observe the "temperature-time" real-time curve of each additional thermocouple and furnace chamber thermocouple connected to the cable part through the process monitoring module of the mobile terminal, observe the operating failure of each component and the wireless connection status of the mobile terminal and the wireless communication module, and the visual prompt of the alarm threshold. Switch to the typical moment photo display page of the report generation module as needed, take a photo of the sample and insert it into the page;

[0086] Step 5: When the test is finished or the temperature data recording is finished through the control and setting module of the mobile terminal, the wireless communication connection between the mobile terminal and the wireless communication module is disconnected, and the electric furnace device is powered off;

[0087] Step 6. Switch to the supervision test questions and conclusions page of the report generation module, and fill in the test questions and conclusions into the interface through voice transcription or key input;

[0088] Step 7. Enter the package transmission module, merge the pages of the report generation module into a PDF file, convert the "temperature-time" data of the whole process obtained by the process monitoring module into a spreadsheet, and transmit the PDF file and spreadsheet to an email mailbox for backup and send them to the fire protection construction party that accepts supervision and inspection through the wireless network;

[0089] S7. The whole test process is completed: store the electric furnace device and the mobile terminal.

[0090] The beneficial effects of the present invention are as follows: the fire protection design of a component and the electric furnace device for fire supervision of the present invention are protection combination system samples composed of "plate + plate" or "plate + cotton (cavity)" and protected materials, that is, the fire protection sample of the component by the coating method provides boundary conditions for simulating the connection and fixation of the multi-layer protection materials by screws outside and inside the plane and the heat transfer boundary conditions considering the interface thermal resistance for the thermal insulation performance test, and at the same time makes up for the failure of the one-dimensional heat transfer assumption caused by the lack of insulation boundary conditions or the lack of attention to the gaps around the test sample, and thus the inability to accurately evaluate the thermal insulation performance of the fire protection structure, and can take into account the structural requirements of fireproof boards, cotton felts, coatings and cavities. The equivalent furnace temperature rise curve provided is simple to set up, has reliable effects, reduces the cost of hardware equipment and the entry threshold for modification and testing using existing electric furnaces. It provides simple experimental devices and methods for related fire protection material R&D units and production units to conduct tests on their own, provides technical and economic guarantees for multiple reproducibility tests, improves the success rate of the product's "one-time inspection" type inspection to achieve the fire resistance limit target, and avoids unnecessary waste. It also provides software and hardware conditions for on-site fire supervision witness tests, which can record first-hand situations in a timely manner and quickly form supervision result reports, greatly improving the efficiency of fire supervision and law enforcement.

[0091] The design of the control and display transmission box fully takes into account the functional integration requirements of general laboratory tests and on-site fire supervision witness tests;

[0092] Through the design of the constrained insulation component, the force constraints outside and inside the plane of the specimen caused by the fixing of single and multi-layer insulation materials (including cavities) to the protected material and the actual interface thermal resistance caused by out-of-plane extrusion are simulated. In addition, reliable insulation boundaries are used on the four facades of the specimen to meet the one-dimensional transient heat transfer assumption, and then the thermal insulation performance of the fire protection material (structural combination system) is accurately evaluated. A self-balancing reaction force (clamping and fixing) system is formed between the constrained insulation component and the tested piece. The furnace body only bears the lighter weight of the tested piece and the constrained insulation component. There is no additional loading force from the outside, and the mechanical strength requirements of the furnace body are low.

[0093] The design of the insulation cover can be used to study the two boundary conditions of insulation on the back of the test piece or heat exchange with the air, that is, to simulate the situation that the column component is surrounded by the insulation structure and the room on one side of the partition wall component is on fire, while the room on the other side is initially at room temperature, which has a wide range of heat transfer boundary applicability;

[0094] Through the functional design of the mobile terminal, it fully meets the needs of conducting witness tests and quickly recording, summarizing, publishing supervision results and saving data files during current on-site fire inspections.

[0095] The present invention provides the necessary software and hardware conditions for component fire protection design and fire supervision, which is a comprehensive improvement in reliability and convenience. It not only meets the laboratory-level testing needs of enterprises and research institutions, but also meets the urgent needs of fire law enforcement sites. It has huge social security and economic benefits, and can effectively improve the scientific, refined and professional level of building structure fire protection and supervision.

[0096] The present invention can simulate the real boundary relationship between the protected material and the insulation material, provide a simple and reliable method for setting the equivalent temperature rise curve, provide a device and method for fire protection research and development and fire scene supervision, and can quickly generate a test report, greatly improving the efficiency of supervision and law enforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Figure 1 The overall diagram of the electric furnace device of the present invention;

[0098] Figure 2 An exploded view of the electric furnace device structure of the present invention;

[0099] Figure 3 A schematic diagram of the structure of the control display transmission box of the present invention;

[0100] Figure 4 A cutaway view of a well-shaped heat-insulating clamping grid of the present invention;

[0101] Figure 5 A perspective view of the thermal insulation lateral top block of the present invention;

[0102] Figure 6 A perspective view of the thermally insulating lateral top frame of the present invention;

[0103] Figure 7 A structural diagram of a bolt of the present invention;

[0104] Figure 8 Composition diagram of the heat-insulating filling block I of the present invention;

[0105] Fig. 9 Composition diagram of the heat-insulating filling block II of the present invention;

[0106] Fig.10 A top view of the thermal insulation cover of the present invention;

[0107] Fig.11 Bottom view of the thermal insulation cover of the present invention;

[0108] Fig.12 A schematic diagram of the structure of the restrained insulation assembly I of the present invention;

[0109] Fig.13 A schematic diagram of the structure of the restrained insulation assembly II of the present invention;

[0110] Fig.14A circuit connection block diagram of the present invention;

[0111] Fig.15 A schematic diagram of the use process of the present invention;

[0112] Fig.16 A diagram showing the assembly and use of the restrained heat-insulating assembly I and the heat-insulating cover of the present invention;

[0113] Fig.17 Diagram of the assembly and use of the restrained insulation component II and the insulation cover of the present invention;

[0114] Fig.18 A cross-sectional view of the middle surface of the thermocouple in the furnace chamber of the electric furnace device of the present invention;

[0115] Fig.19 A cross-sectional view of the middle surface of a bolt of an electric furnace device of the present invention;

[0116] Fig. 20 The present invention Fig.19 Middle A is a partial enlarged view;

[0117] Fig.21 The present invention Fig.19 Middle B is a partial enlarged view;

[0118] Fig. 22 A schematic diagram of the composition of the cubic sample I of the present invention;

[0119] Fig.23 Schematic diagram of the test installation of the cube specimen I of the present invention;

[0120] Fig.24 A schematic diagram of the composition of the cubic sample II of the present invention;

[0121] Fig.25 Schematic diagram of the test installation of the cube specimen II of the present invention;

[0122] Fig.26 Schematic diagram of the composition of cubic sample III of the present invention;

[0123] Fig. 27 Schematic diagram of the test installation of the cube specimen III of the present invention;

[0124] Fig.28 A schematic diagram of the composition of the cylindrical sample I of the present invention;

[0125] Fig.29 Schematic diagram of the test installation of cylindrical specimen I of the present invention. DETAILED DESCRIPTION

[0126] like Figures 1 to 29As shown, an electric furnace device for component fire protection design and fire supervision includes a furnace body 1 composed of a rectangular hollow furnace wall 1-1 and a square furnace cavity bottom plate 1-2. The rectangular hollow furnace wall 1-1 realizes heating in the furnace cavity through an internal heating body, and also includes a control and display transmission box 2, a furnace cavity thermocouple 3, a constrained insulation component 4, an insulation cover 5, and an additional thermocouple 6.

[0127] A circle of L-shaped inward-retracted eaves 1-3 is provided at the upper end of the rectangular hollow furnace wall 1-1, and a fixing hole 1-4 is provided at the center of the square furnace cavity bottom plate 1-2.

[0128] The control display transmission box 2 is a hollow rectangular box, and a through wire hole 2-1 is provided in the center of the upper surface of the control display transmission box 2. A display part 2-2, a control part 2-3 and a cable part 2-4 are provided on one side panel of the control display transmission box 2. A control module, a data acquisition module and a wireless communication module are installed inside the control display transmission box 2.

[0129] The restrained thermal insulation assembly 4 is divided into a restrained thermal insulation assembly I 4A or a restrained thermal insulation assembly II 4B.

[0130] The restrained insulation assembly I4A is composed of a well-shaped insulation clamping grid 4-1, an insulation lateral top block 4-2, bolts 4-4, bolt caps 4-5, and an insulation filling block I4-6.

[0131] The heat-insulating filling block I 4-6 is composed of four high-filling strip blocks 4-6-1 and four high-filling corner blocks 4-6-2.

[0132] Two well-shaped heat-insulating clamping grids 4-1 are arranged horizontally and spaced apart from each other. An insulation lateral top block 4-2 is respectively arranged between eight pairs of bolt plates 4-1-2 that are opposite to each other in the two well-shaped heat-insulating clamping grids 4-1. The top pressure surfaces I4-2-4 of the two insulation lateral top blocks 4-2 located at the head and tail ends of each well-shaped inner rib 4-1-1 of the well-shaped heat-insulating clamping grid 4-1 face each other.

[0133] The screw rods 4-4-1 of the eight bolts 4-4 are respectively inserted into the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1 and the through circular holes Ⅰ4-2-3 of the eight heat-insulating lateral top blocks 4-2 in sequence, extend out from the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1, and are screwed with the eight bolt caps 4-5, the end plate 4-4-2 of each bolt 4-4, each bolt plate 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1, and the lower square boss Ⅰ4-2-1 of each heat-insulating lateral top block 4-2 are in close surface contact from bottom to top, and the upper square boss Ⅰ4-2-1 of each heat-insulating lateral top block 4-2, each bolt plate 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1, and each bolt cap 4-5 are in close surface contact from bottom to top;

[0134] A high-filling strip block 4-6-1 is respectively inserted into the four strip-shaped gap areas formed between the eight insulating lateral top blocks 4-2, and a high-filling corner block 4-6-2 is respectively inserted into the four corner-shaped gap areas formed between the eight insulating lateral top blocks 4-2. The bottom surfaces of the four high-filling strip blocks 4-6-1, the bottom surfaces of the four high-filling corner blocks 4-6-2, the bottom surfaces of the eight end plates 4-4-2 and the lower surface of the outer insulation layer 4-1-4 of the lower well-shaped insulating clamping grid 4-1 are in the same plane.

[0135] The restrained insulation assembly II 4B is composed of a well-shaped insulation clamping grid 4-1, an insulation lateral top frame 4-3, bolts 4-4, bolt caps 4-5, and an insulation filling block II 4-7;

[0136] The heat-insulating filling block II 4-7 is composed of four short filling strip blocks 4-7-1 and four short filling corner blocks 4-7-2.

[0137] Two well-shaped heat-insulating clamping grilles 4-1 are arranged horizontally and spaced apart from each other, and an insulation lateral top frame 4-3 is arranged between the two well-shaped heat-insulating clamping grilles 4-1. The screw rods 4-4-1 of the eight bolts 4-4 are respectively inserted into the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1, the eight through-holes II 4-3-3 of the insulation lateral top frame 4-3, and the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1 are inserted into the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1. Extend out and be screwed with eight bolt caps 4-5, the end plate 4-4-2 of each bolt 4-4, each bolt plate 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1, each bottom square boss II 4-3-1 of the heat-insulating lateral top frame 4-3 are in close surface contact from bottom to top, each top square boss II 4-3-1 of the heat-insulating lateral top frame 4-3, each bolt plate 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1, and each bolt cap 4-5 are in close surface contact from bottom to top;

[0138] In the four strip-shaped gaps formed between the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grid 4-1 below the heat-insulating lateral top frame 4-3, a short filling strip block 4-7-1 is respectively inserted, and in the four corner gaps formed between the eight bolt plates 4-1-2, a short filling corner block 4-7-2 is respectively inserted;

[0139] The bottom surfaces of the four short filling strips 4-7-1, the bottom surfaces of the four short filling corner blocks 4-7-2, the bottom surfaces of the eight end plates 4-4-2 and the lower surface of the outer insulation layer 4-1-4 of the lower well-shaped insulation clamping grid 4-1 are in the same plane.

[0140] The furnace body 1 is fixed to the upper surface of the control display transmission box 2 through the square furnace cavity chassis 1-2, and the fixing hole 1-4 is aligned with the wire hole 2-1;

[0141] The restrained heat-insulating assembly 4 is a restrained heat-insulating assembly I4A whose lower end is tightly embedded in an L-shaped inwardly contracted eave 1-3 at the upper end of the furnace body 1;

[0142] The insulation cover 5 is buckled on the restrained insulation component 4 as the restrained insulation component Ⅰ4A, the recessed well groove 5-5 on the bottom of the insulation cover 5 is aligned and buckled with the upper well-shaped insulation clamping grid 4-1 of the restrained insulation component 4 as the restrained insulation component Ⅰ4A, the eight bolt plates 4-1-2 of the upper well-shaped insulation clamping grid 4-1 are vertically opposite to the eight vertical square through grooves 5-4 of the insulation cover 5, the sample edge alignment line 5-8 on the bottom surface of the insulation cover 5 is fitted with the inner edges of the top surfaces of the four high-filling strips 4-6-1 and the four high-filling corner blocks 4-6-2, and an additional thermocouple 6 is fixed in the thermocouple fixing through hole Ⅰ5-1, the thermocouple fixing through hole Ⅱ5-2, and the thermocouple fixing through hole Ⅲ5-3 of the insulation cover 5 respectively;

[0143] Or the lower end of the constrained insulation component 4 is the constrained insulation component Ⅱ4B, which is tightly embedded in the L-shaped inward-retracted eaves 1-3 at the upper end of the furnace body 1. The insulation cover 5 is buckled on the constrained insulation component 4 is the constrained insulation component Ⅱ4B. The indented well groove 5-5 at the bottom of the insulation cover 5 is aligned and buckled with the upper well-shaped insulation clamping grid 4-1 of the constrained insulation component 4 is the constrained insulation component Ⅱ4B. The eight bolt plates 4-1-2 of the upper well-shaped insulation clamping grid 4-1 are opposite to the eight vertical square grooves 5-4 of the insulation cover 5. The sample edge alignment line 5-8 on the bottom surface of the insulation cover 5 is tangent to the circumference of the sample hole 4-3-4 of the insulation lateral top frame 4-3. An additional thermocouple 6 is fixed in the thermocouple fixing through hole Ⅰ5-1, the thermocouple fixing through hole Ⅱ5-2, and the thermocouple fixing through hole Ⅲ5-3 of the insulation cover 5 respectively.

[0144] The control module is respectively connected to the heating body, the data acquisition module, the wireless communication module, the display unit 2-2, the control unit 2-3, and the cable unit 2-4; the furnace cavity thermocouple 3 is vertically fixed in the fixing hole 1-4 of the square furnace cavity chassis 1-2 in the furnace body 1, and is respectively connected to the control module and the data acquisition module through the wire hole 2-1; three additional thermocouples 6 are respectively connected to the data acquisition module through the cable unit 2-4; and the wireless communication module is wirelessly connected to the mobile terminal to realize communication.

[0145] The eight ends of the four well-shaped inner ribs 4-1-1 of the well-shaped thermal insulation clamping grid 4-1 are respectively connected to a horizontally placed bolt plate 4-1-2, and a through bolt plate hole 4-1-3 is provided in the center of each bolt plate 4-1-2. The outer surface of the well-shaped inner rib 4-1-1 is wrapped with an outer insulation layer 4-1-4 with a square cross-section.

[0146] The insulating top block 4-2-2 of the insulating lateral top block 4-2 is rectangular, and a pair of square bosses Ⅰ4-2-1 are arranged opposite to each other on the same side of the upper and lower end surfaces, and a through circular hole Ⅰ4-2-3 penetrating the pair of square bosses Ⅰ4-2-1 and the insulating top block 4-2-2 is arranged on the center line connecting the two square bosses Ⅰ4-2-1, and the vertical surface of the insulating top block 4-2-2 away from the pair of square bosses Ⅰ4-2-1 is a top pressure surface Ⅰ4-2-4.

[0147] The insulating top frame 4-3-2 of the insulating lateral top frame 4-3 is a flat square block with a through sample hole 4-3-4 provided at the center thereof, the annular vertical surface of the sample hole 4-3-4 being a top pressure surface Ⅱ4-3-5, eight square bosses Ⅱ4-3-1 are symmetrically arranged around the top surface of the insulating top frame 4-3-2, and another square boss Ⅱ4-3-1 is respectively arranged on the bottom surface of the insulating top frame 4-3-2 at a position opposite to each square boss Ⅱ4-3-1 on the top surface, and a through circular hole Ⅱ4-3-3 penetrating the square boss Ⅱ4-3-1 and the insulating top frame 4-3-2 is provided on the center line of each square boss Ⅱ4-3-1 on the top and bottom surfaces vertically.

[0148] The vertical distance between the upper end of the furnace chamber thermocouple 3 and the surface of the sample to be tested facing the furnace chamber is 10 cm.

[0149] The plane outer contour of the well-shaped inner rib 4-1-1 is larger than the inner cross-section of the rectangular hollow furnace wall 1-1.

[0150] The thickness of the insulating lateral top block 4-2 in the direction perpendicular to the top pressure surface Ⅰ4-2-5 is equal to the thickness of the insulating filling block Ⅰ4-6, which is equal to the retracted thickness of the L-shaped retracted eaves 1-3.

[0151] The plane position of the thermocouple fixing through hole I5 - 1 is located at the center of the insulation cover 5 .

[0152] The plane position of the thermocouple fixing through hole II 5-2 is located at the center of the square formed by the intersection of a square convex surface 5-7 and the sample edge alignment line 5-8.

[0153] The plane position of the thermocouple fixing through hole III 5-3 is located at the center of the inner rectangle formed by the intersection of a rectangular convex surface 5-6 and the sample edge alignment line 5-8.

[0154] The mobile terminal functions are as follows:

[0155] The first item is to send control instructions to the wireless communication module in the control and display transmission box 2 through wireless communication and receive execution status, such as fault conditions, especially to obtain temperature data recorded by the data acquisition module in real time through the wireless communication module;

[0156] Item 2: It has the functions of voice transcription text input and key input;

[0157] Item 3: It has the function of taking photos and photo timer, that is, the photos taken are accompanied by the time from the start of the test as zero, in seconds;

[0158] Item 4: The main display interface of the mobile terminal includes: a control and setting module, a process monitoring module, a report generation module, a database module, and a package transmission module, wherein:

[0159] (1) The functions of the control and setting module include: connection or disconnection control of the mobile terminal and the wireless communication module, one-key synchronization of the mobile terminal display time and the built-in objective time of the control module of the control display transmission box 2, synchronous control test start and temperature data recording start, asynchronous control test end and temperature data recording end, table fill-in input time and corresponding furnace body 1 target temperature value, setting the alarm threshold of each additional thermocouple 6 connected to the cable part 2-4;

[0160] (2) The functions of the process monitoring module include: displaying the wireless connection status between the mobile terminal and the wireless communication module, displaying the operating fault status of each component of the electric furnace device, displaying the real-time development of the "temperature-time" of each additional thermocouple 6 connected to the cable part 2-4 and the furnace cavity thermocouple 3 and the corresponding alarm threshold reaching status;

[0161] (3) The functions of the report generation module include: A. General information filling page, such as project name, time and location, fire protection sampling information, and fire protection status description; B. Temperature result page, which displays the end time of temperature data recording and the "temperature-time" process of each additional thermocouple 6 connected to the cable part 2-4 and the furnace chamber thermocouple 3; C. Typical time photo display page, which inserts the sample photos taken during the test with relative time; D. Supervision test problem and conclusion page, which inputs text into the problem description box and the conclusion box respectively; In addition, when clicking to enter any page from A to D, the other pages will be automatically minimized and automatically saved;

[0162] (4) Database module functions include: checking the thermal performance, structural requirements and styles of commonly used fire protection materials, and corresponding national and local standard information;

[0163] (5) The functions of the package transmission module include: converting the "temperature-time" data of the whole process obtained by the process monitoring module into a spreadsheet, merging the pages of the report generation module into a PDF file, and transmitting them to a computer, an email address, and sending them to the owner of the supervision inspection as needed through a wireless network;

[0164] (6) In addition, the package transmission module can only be accessed after the temperature data recording is completed. When entering any module from (1) to (5), the other modules are minimized and saved automatically;

[0165] A method for using an electric furnace device for component fire protection design and fire supervision, the process is as follows:

[0166] It is planned to carry out testing on four groups of example specimens, including: cube specimen I7A, cube specimen II7B, cube specimen III7C, and cylindrical specimen I8A.

[0167] S1. Determine the test scenario:

[0168] Determine the test scenario according to the application needs. S1A is a laboratory test. Commonly, the control and display transmission box 2 of the electric furnace device is used to control the electric furnace device to meet the needs. S1B is an on-site supervision test. Commonly, the mobile terminal is used to control the electric furnace device to meet the needs.

[0169] S1A, conduct laboratory tests on cubic specimens I7A and II7B;

[0170] S1B, conduct on-site supervision test on cubic specimen Ⅲ7C and cylindrical specimen Ⅰ8A;

[0171] S2. Place the device on site: move the electric furnace device to the site and place it in a stable position;

[0172] S3. Installation of the test sample: The optional shapes of the test sample include a flat square cube sample 7 and a cylindrical sample 8, where:

[0173] The cubic sample I7A is composed of two square thermal insulation samples A10-1, one square thermal insulation sample B11 and a square target sample 9-1, which are aligned on all sides and pressed in sequence from bottom to top, and the bottom surface of the bottom square thermal insulation sample A10-1 faces the furnace cavity;

[0174] The cubic sample II7B is composed of two square heat-insulating samples A10-1 and a square target sample 9-1, whose edges are aligned and pressed from bottom to top, and the bottom surface of the bottom square heat-insulating sample A10-1 faces the furnace cavity;

[0175] The cubic sample III7C is composed of a square thermal insulation sample A10-1, a square thermal insulation sample A10-1 with a joint material 12, and a square target sample 9-1, the edges of which are aligned and pressed in sequence from bottom to top, and the bottom surface of the bottom square thermal insulation sample A10-1 faces the furnace cavity;

[0176] The cylindrical sample I8A is composed of two circular heat-insulating samples A10-2 and a circular target sample 9-2, whose edges are aligned from bottom to top, and a layer of sample cavity 13 is formed between the upper circular heat-insulating sample A10-2 and the circular target sample 9-2, and the bottom surface of the bottom circular heat-insulating sample A10-2 faces the furnace cavity;

[0177] S3A, when testing cube specimen Ⅰ7A, the installation steps are as follows:

[0178] The first step is to use the restrained insulation assembly Ⅰ4A, that is, to set the cubic specimen Ⅰ7A between two well-shaped insulation clamping grids 4-1, and to set an insulation lateral top block 4-2 between eight pairs of bolt plates 4-1-2 facing each other on the two well-shaped insulation clamping grids 4-1, respectively, and the top pressure surfaces Ⅰ4-2-5 of the eight insulation lateral top blocks 4-2 are all in contact with the surrounding vertical surfaces of the cubic specimen Ⅰ7A;

[0179] In the second step, the screw rods 4-4-1 of the eight bolts 4-4 are inserted into the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1 and the through circular holes I 4-2-3 of the eight heat-insulating lateral top blocks 4-2 in sequence, extend out from the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1, and are screwed with the eight bolt caps 4-5. The end plate 4-4-2 of each bolt 4-4, each bolt plate 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1, and each heat-insulating lateral top block 4-2 are screwed together. -2's lower square boss Ⅰ4-2-1 is in close surface contact from bottom to top, and the upper square boss Ⅰ4-2-1 of each insulating lateral top block 4-2, each bolt plate 4-1-2 of the upper well-shaped insulating clamping grid 4-1, and each bolt cap 4-5 are in close surface contact from bottom to top, so that the upper and lower well-shaped insulating clamping grids 4-1 give enough clamping force to the cubic specimen Ⅰ7A in the thickness direction, and the eight insulating lateral top blocks 4-2 located around the cubic specimen Ⅰ7A give enough clamping force to the cubic specimen Ⅰ7A in the horizontal plane;

[0180] Step 3: insert a high-filling strip block 4-6-1 into each of the four strip-shaped gap areas formed between the eight insulating lateral top blocks 4-2, and insert a high-filling corner block 4-6-2 into each of the four corner-shaped gap areas formed between the eight insulating lateral top blocks 4-2. The bottom surfaces of the four high-filling strip blocks 4-6-1, the bottom surfaces of the four high-filling corner blocks 4-6-2, the bottom surfaces of the eight end plates 4-4-2, and the lower surface of the outer insulating layer 4-1-4 of the lower well-shaped insulating clamping grid 4-1 are in the same plane;

[0181] Step 4: The assembly formed in the first to third steps is tightly embedded in the L-shaped inward-retracted eaves 1 - 3 of the furnace body 1 as a whole.

[0182] When testing cube specimen Ⅱ7B, the installation steps are the same as cube specimen Ⅰ7A;

[0183] When testing cube specimen III7C, the installation steps are the same as cube specimen I7A;

[0184] S3B, when testing cylindrical specimen Ⅰ8A, the installation steps are as follows:

[0185] The first step is to use the constrained insulation assembly II 4B, that is, to set an insulation lateral top frame 4-3 on the well-shaped insulation clamping grid 4-1 of the lower layer, set the cylindrical sample I8A in the sample hole 4-3-4 at the center of the insulation lateral top frame 4-3, and set another well-shaped insulation clamping grid 4-1 on the insulation lateral top frame 4-3;

[0186] In the second step, the screw rods 4-4-1 of the eight bolts 4-4 are inserted into the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grille 4-1 and the eight through-holes II 4-3-3 of the heat-insulating lateral top frame 4-3 in sequence, and extend out from the bolt plate holes 4-1-3 of the eight bolt plates 4-1-2 of the upper well-shaped heat-insulating clamping grille 4-1, and are screwed with the eight bolt caps 4-5. Each bolt 4-4 is inserted into the end plate 4-4-2 of the lower well-shaped heat-insulating clamping grille 4-1. Each bolt plate 4-1-2 and each bottom square boss II 4-3-1 of the heat-insulating lateral top frame 4-3 are in close surface contact from bottom to top, and each top square boss II 4-3-1 of the heat-insulating lateral top frame 4-3, each bolt plate 4-1-2 of the upper well-shaped heat-insulating clamping grid 4-1, and each bolt cap 4-5 are in close surface contact from bottom to top; so that the heat-insulating lateral top frame 4-3 located around the cylindrical sample I8A can give the cylindrical sample I8A sufficient clamping force in the horizontal plane;

[0187] Step 3: insert a short filling strip block 4-7-1 into each of the four strip gaps formed between the eight bolt plates 4-1-2 of the lower well-shaped heat-insulating clamping grid 4-1 below the heat-insulating lateral top frame 4-3, and insert a short filling corner block 4-7-2 into each of the four corner gaps formed between the eight bolt plates 4-1-2, so that the bottom surfaces of the four short filling corner blocks 4-6-3, the bottom surfaces of the four short filling corner blocks 4-7-2, the bottom surfaces of the eight end plates 4-4-2 and the lower surface of the outer insulation layer 4-1-4 of the lower well-shaped heat-insulating clamping grid 4-1 are in the same plane;

[0188] Step 4: The assembly formed in the first to third steps is tightly embedded in the L-shaped inward-retracted eaves 1 - 3 of the furnace body 1 as a whole.

[0189] S4. Back-fire surface insulation selection: Select whether to adopt adiabatic boundary conditions for the non-heating surface of the test sample, where S4A uses an insulating cover 5, that is, simulates adiabatic boundary conditions on the non-heating surface of the test sample, and S4B does not use an insulating cover 5, that is, simulates natural convection boundary conditions on the non-heating surface of the test sample;

[0190] For the four groups of sample tests, the heat preservation selection of the back-fired surface is as follows:

[0191] S4A. For cubic specimen II7B, the installation steps using the insulation cover 5 are as follows:

[0192] After completing the first to fourth steps of installing the cube specimen II7B in S3A, proceed to the following installation steps:

[0193] The first step is to buckle the heat-insulating cover 5 onto the upper well-shaped heat-insulating clamping grid 4-1 of the constrained heat-insulating assembly Ⅰ4A, and align and buckle the well-shaped groove 5-5 on the bottom of the heat-insulating cover 5 with the upper well-shaped heat-insulating clamping grid 4-1, so that the four rectangular convex surfaces 5-6 and the four square convex surfaces 5-7 are in contact with the upper surface of the cubic sample Ⅱ7B and the heat-insulating filling block Ⅰ4-6;

[0194] In the second step, an additional thermocouple 6 is respectively fixed to the thermocouple fixing through hole Ⅰ5-1, the thermocouple fixing through hole Ⅱ5-2, and the thermocouple fixing through hole Ⅲ5-3 of the insulation cover 5, so that the ends of the three additional thermocouples 6 are in contact with the upper surface of the cubic sample Ⅱ7B, and the three additional thermocouples 6 are respectively connected to the data acquisition module through the cable part 2-4.

[0195] For cylindrical specimen I8A, the installation steps using the insulation cover 5 are as follows:

[0196] After completing the first to fourth steps of installing the cylindrical specimen I8A in S3B, proceed to the following installation steps:

[0197] The first step is to buckle the heat-insulating cover 5 onto the upper well-shaped heat-insulating clamping grid 4-1 of the constrained heat-insulating assembly II 4B, and align and buckle the well-shaped groove 5-5 at the bottom of the heat-insulating cover 5 with the upper well-shaped heat-insulating clamping grid 4-1, so that the four rectangular convex surfaces 5-6 and the four square convex surfaces 5-7 are in contact with the upper surface of the cylindrical sample I 8A and the heat-insulating top frame 4-3-2;

[0198] Step 2: fix an additional thermocouple 6 to the thermocouple fixing through hole Ⅰ5-1, the thermocouple fixing through hole Ⅱ5-2, and the thermocouple fixing through hole Ⅲ5-3 of the thermal insulation cover 5, respectively, so that the ends of the three additional thermocouples 6 are in contact with the upper surface of the cylindrical sample Ⅰ8A, and the three additional thermocouples 6 are connected to the data acquisition module through the cable parts 2-4 respectively;

[0199] The upper surface of S4B, cubic specimen I7A or cubic specimen III7C is exposed to the indoor air except for the area that is in close contact with the lower surface of the upper well-shaped thermal insulation clamping grid 4-1;

[0200] S5. Preparation for furnace temperature setting: According to the needs of the four groups of sample tests, the equivalent heating curve "temperature-time" data to be input into the control display transmission box 2 or the mobile terminal is determined by calculation. The specific preparation steps are as follows:

[0201] The first step is to determine the target fire resistance limit t=x hours t≥2.00h;

[0202] Step 2: Select the temperature rise curve specified in GB / T 9978.1 or the "slow temperature rise curve", "HC temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve" and "tunnel fire RABT temperature rise curve" specified in GB / T 26784, and substitute the time t into the corresponding "temperature-time relationship" to obtain the target temperature T;

[0203] The third step is to set the equivalent temperature rise curve according to the target fire resistance limit;

[0204] Case 1: For the selection of the heating curve specified in GB / T 9978.1 or the "slow heating curve" specified in GB / T 26784: when t=2.00h, set "the furnace temperature rises linearly to the target temperature T in the furnace within 0.50h, and keeps warm until t=2.00h" through the control display transmission box 2 or the mobile terminal; when t=3.00h, set "the furnace temperature rises linearly to the target temperature T in the furnace within 1.00h, and keeps warm until t=3.00h" through the control display transmission box 2 or the mobile terminal, and both are handed over to the control module for execution after the test starts;

[0205] Case 2: For the "HC temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve" and "tunnel fire RABT temperature rise curve" specified in GB / T 26784: set "the furnace temperature rises linearly to the target temperature T in the furnace within 1.00h, and continues to keep warm for t=x hours" through the control display transmission box 2 or the mobile terminal, and let the control module execute it after the test starts;

[0206] S6. Operation mode selection: according to the scene operation test process determined in S1, S6A is to use the control display transmission box 2, including for the cube sample I7A and the cube sample II7B; S6B is to use the mobile terminal, including for the cube sample III7C and the cylindrical sample I8A;

[0207] S6A, control test process using control display transmission box 2:

[0208] The first step is to start the electric furnace device by powering on the cable unit 2-4 and the control unit 2-3;

[0209] Step 2: Input the prepared equivalent temperature rise curve in the "temperature-time" mode by pressing buttons on the control unit 2-3 or by touching the display unit 2-2, and set the alarm threshold of each additional thermocouple 6 connected to the cable unit 2-4;

[0210] Step 3: The control unit 2-3 synchronously controls the start of the test and the start of temperature data recording, and the display unit 2-2 is used to observe the real-time "temperature-time" curve of each additional thermocouple 6 and the furnace cavity thermocouple 3 under test, the operating failure of each component, the visual prompt of the alarm threshold, and the working condition of the wireless communication module;

[0211] Step 4: Control the test to end or the temperature data recording to end through the control unit 2-3;

[0212] Step 5: Copy the spreadsheet data recorded by the data acquisition module through the cable unit 2-4 to analyze whether the temperature of the target sample reaches the failure criterion within the designed fire resistance time, that is, whether the target fire resistance limit can be reached, that is, to evaluate the effect of the fire protection structure used in the test, so as to further optimize the protection plan. And shut down the electric furnace device;

[0213] S6B, control test process using mobile terminal:

[0214] The first step is to start the electric furnace device by powering on the cable part 2-4 and the control part 2-3, start the wireless communication module by the control part 2-3 and observe its working condition by the display part 2-2;

[0215] Step 2: Connect the mobile terminal to the wireless communication module by wireless communication, synchronize the mobile terminal display time with the built-in objective time of the control module of the control and display transmission box 2 by one key, input the prepared equivalent temperature rise curve and set the alarm threshold of each additional thermocouple 6 connected to the cable part 2-4 in the control and setting module of the mobile terminal according to the "temperature-time" mode, enter the report generation module and input the project name, time and place, fire protection sampling information and fire protection status description of the test sample on the general information filling page;

[0216] Step 3: Synchronize the start of the test and the start of temperature data recording through the control and setting module of the mobile terminal;

[0217] Step 4: Observe the "temperature-time" real-time curve of each additional thermocouple 6 connected to the cable part 2-4 and the furnace cavity thermocouple 3 through the process monitoring module of the mobile terminal, observe the operating failure of each component and the wireless connection status of the mobile terminal and the wireless communication module, and the visual prompt of the alarm threshold, switch to the typical moment photo display page of the report generation module as needed, take a sample photo and insert it into the page;

[0218] Step 5: When the test is finished or the temperature data recording is finished through the control and setting module of the mobile terminal, the wireless communication connection between the mobile terminal and the wireless communication module is disconnected, and the electric furnace device is powered off;

[0219] Step 6. Switch to the supervision test questions and conclusions page of the report generation module, and fill in the test questions and conclusions into the interface through voice transcription or key input;

[0220] Step 7. Enter the package transmission module, merge the pages of the report generation module into a PDF file, convert the "temperature-time" data of the whole process obtained by the process monitoring module into a spreadsheet, and transmit the PDF file and the spreadsheet to an email address through a wireless network to back up the data of this fire supervision process for review, and send it to the fire protection construction party that accepts supervision and inspection to further guide the purchase of fire protection materials and the improvement of construction technology;

[0221] S7. The whole test process is completed: store the electric furnace device and the mobile terminal.

Claims

1. An electric furnace device for component fire protection design and fire supervision, comprising a furnace body (1) consisting of a rectangular hollow furnace wall (1-1) and a square furnace cavity bottom plate (1-2), wherein the rectangular hollow furnace wall (1-1) is heated in the furnace cavity by a built-in heating body, and is characterized in that: It also includes a control and display transmission box (2), a furnace cavity thermocouple (3), a restrained insulation component (4), an insulation cover (5), and an additional thermocouple (6); The upper end of the rectangular hollow furnace wall (1-1) is provided with a circle of L-shaped inward-retracted eaves (1-3), and the center of the square furnace cavity bottom plate (1-2) is provided with a fixing hole (1-4); The control display transmission box (2) is a hollow rectangular box body, a through-hole (2-1) is provided at the center of the upper surface of the control display transmission box (2), a display unit (2-2), a control unit (2-3) and a cable unit (2-4) are provided on a side panel of the control display transmission box (2), and a control module, a data acquisition module and a wireless communication module are installed inside the control display transmission box (2); The restrained thermal insulation component (4) is divided into a restrained thermal insulation component I (4A) or a restrained thermal insulation component II (4B); The restrained insulation assembly I (4A) is composed of a well-shaped insulation clamping grid (4-1), an insulation lateral top block (4-2), bolts (4-4), bolt caps (4-5), and an insulation filling block I (4-6); The heat-insulating filling block I (4-6) is composed of four high-filling strip blocks (4-6-1) and four high-filling corner blocks (4-6-2); The two well-shaped heat-insulating clamping grilles (4-1) are arranged horizontally and spaced apart from each other. An insulation lateral top block (4-2) is respectively arranged between eight pairs of bolt plates (4-1-2) facing each other up and down of the two well-shaped heat-insulating clamping grilles (4-1). The top pressure surfaces I (4-2-4) of the two insulation lateral top blocks (4-2) located at the head and tail ends of each well-shaped inner rib (4-1-1) of the well-shaped heat-insulating clamping grilles (4-1) face each other. The screw rods (4-4-1) of the eight bolts (4-4) are respectively inserted into the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the lower well-shaped heat-insulating clamping grid (4-1) and the through circular holes I (4-2-3) of the eight heat-insulating lateral top blocks (4-2) in sequence, extend out from the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the upper well-shaped heat-insulating clamping grid (4-1), and are screwed to the eight bolt caps (4-5). The end plate (4-4-2) of each bolt (4-4), each bolt plate (4-1-2) of the lower well-shaped heat-insulating clamping grid (4-1), and the lower square boss I (4-2-1) of each heat-insulating lateral top block (4-2) are in close surface contact from bottom to top, and the upper square boss I (4-2-1) of each heat-insulating lateral top block (4-2), each bolt plate (4-1-2) of the upper well-shaped heat-insulating clamping grid (4-1), and each bolt cap (4-5) are in close surface contact from bottom to top; A high-filling strip block (4-6-1) is inserted into each of the four strip-shaped gap regions formed between the eight heat-insulating lateral top blocks (4-2), and a high-filling corner block (4-6-2) is inserted into each of the four corner-shaped gap regions formed between the eight heat-insulating lateral top blocks (4-2). The bottom surfaces of the four high-filled strip blocks (4-6-1), the bottom surfaces of the four high-filled corner blocks (4-6-2), the bottom surfaces of the eight end plates (4-4-2) and the bottom surface of the outer insulation layer (4-1-4) of the lower well-shaped insulation clamping grid (4-1) are in the same plane; The restrained insulation assembly II (4B) is composed of a well-shaped insulation clamping grid (4-1), an insulation lateral top frame (4-3), bolts (4-4), bolt caps (4-5), and an insulation filling block II (4-7); The heat-insulating filling block II (4-7) is composed of four short filling strip blocks (4-7-1) and four short filling corner blocks (4-7-2); The two well-shaped heat-insulating clamping grilles (4-1) are arranged horizontally and spaced apart from each other, and a heat-insulating lateral top frame (4-3) is arranged between the two well-shaped heat-insulating clamping grilles (4-1). The screw rods (4-4-1) of the eight bolts (4-4) are respectively inserted into the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1) and the eight through-holes II (4-3-3) of the heat-insulating lateral top frame (4-3) in sequence, extend out from the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the upper well-shaped heat-insulating clamping grille (4-1), and are screwed to the eight bolt caps (4-5). The end plate (4-4-2) of each bolt (4-4), each bolt plate (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1), and each bottom square boss II (4-3-1) of the heat-insulating lateral top frame (4-3) are in close surface contact from bottom to top, and each top square boss II (4-3-1) of the heat-insulating lateral top frame (4-3), each bolt plate (4-1-2) of the upper well-shaped heat-insulating clamping grille (4-1), and each bolt cap (4-5) are in close surface contact from bottom to top; A short filling strip block (4-7-1) is inserted into each of the four strip-shaped gap areas formed between the eight bolt plates (4-1-2) of the lower well-shaped insulation clamping grid (4-1) below the insulation lateral top frame (4-3), and a short filling corner block (4-7-2) is inserted into each of the four corner-shaped gap areas formed between the eight bolt plates (4-1-2); The bottom surfaces of the four short filling strips (4-7-1), the bottom surfaces of the four short filling corner blocks (4-7-2), the bottom surfaces of the eight end plates (4-4-2) and the bottom surface of the outer insulation layer (4-1-4) of the lower well-shaped insulation clamping grid (4-1) are in the same plane; The furnace body (1) is fixed to the upper surface of the control display transmission box (2) through a square furnace cavity bottom plate (1-2), and the fixing hole (1-4) is aligned with the wire hole (2-1); The restrained insulation component (4) is a restrained insulation component I (4A) whose lower end is tightly embedded in an L-shaped inward-retracted eave (1-3) at the upper end of the furnace body (1). The thermal insulation cover (5) is buckled on the constrained thermal insulation component (4) constrained thermal insulation component I (4A), the recessed well groove (5-5) on the bottom of the thermal insulation cover (5) is aligned and buckled with the upper well-shaped thermal insulation clamping grid (4-1) of the constrained thermal insulation component (4) constrained thermal insulation component I (4A), the eight bolt plates (4-1-2) of the upper well-shaped thermal insulation clamping grid (4-1) are vertically opposite to the eight vertical square grooves (5-4) of the thermal insulation cover (5), the sample edge alignment line (5-8) on the bottom surface of the thermal insulation cover (5) is in contact with the inner edges of the top surfaces of the four high-filling strip blocks (4-6-1) and the four high-filling corner blocks (4-6-2), An additional thermocouple (6) is fixed in each of the thermocouple fixing through hole I (5-1), the thermocouple fixing through hole II (5-2), and the thermocouple fixing through hole III (5-3) of the thermal insulation cover (5); Or the restraining insulation component (4) is a restraining insulation component II (4B) whose lower end is tightly embedded in an L-shaped inward-retracted eaves (1-3) at the upper end of the furnace body (1); The thermal insulation cover (5) is buckled on the constrained thermal insulation component (4) constrained thermal insulation component II (4B), the recessed well groove (5-5) on the bottom of the thermal insulation cover (5) is aligned and buckled with the upper well-shaped thermal insulation clamping grid (4-1) of the constrained thermal insulation component (4) constrained thermal insulation component II (4B), the eight bolt plates (4-1-2) of the upper well-shaped thermal insulation clamping grid (4-1) and the eight vertical square grooves (5-4) of the thermal insulation cover (5) are vertically opposite, and the sample edge alignment line (5-8) on the bottom surface of the thermal insulation cover (5) is tangent to the upper edge of the sample hole (4-3-4) of the thermal insulation lateral top frame (4-3), An additional thermocouple (6) is fixed in each of the thermocouple fixing through hole I (5-1), the thermocouple fixing through hole II (5-2), and the thermocouple fixing through hole III (5-3) of the thermal insulation cover (5); The control module is respectively connected to the heating body, the data acquisition module, the wireless communication module, the display unit (2-2), the control unit (2-3), and the cable unit (2-4); the furnace cavity thermocouple (3) is vertically fixed in a fixing hole (1-4) of a square furnace cavity bottom plate (1-2) in the furnace body (1), and passes through the wire hole (2-1) to be respectively connected to the control module and the data acquisition module; three additional thermocouples (6) are respectively connected to the data acquisition module through the cable unit (2-4); and the wireless communication module is wirelessly connected to a mobile terminal to realize communication; The insulating top block (4-2-2) of the insulating lateral top block (4-2) is rectangular, and a pair of opposite square bosses I (4-2-1) are arranged on the same side of the upper and lower end surfaces thereof, and a through circular hole I (4-2-3) penetrating the pair of opposite square bosses I (4-2-1) and the insulating top block (4-2-2) is arranged on the center line connecting the two square bosses I (4-2-1), and the through circular hole I (4-2-3) penetrating the pair of opposite square bosses I (4-2-1) and the insulating top block (4-2-2) is provided, and the vertical surface of the insulating top block (4-2-2) away from the pair of opposite square bosses I (4-2-1) is a top pressure surface I (4-2-4); The insulating top frame (4-3-2) of the insulating lateral top frame (4-3) is a flat square block, with a through sample hole (4-3-4) provided at its center, the annular vertical surface of the sample hole (4-3-4) being a top pressure surface II (4-3-5), eight square bosses II (4-3-1) being symmetrically provided around the top surface of the insulating top frame (4-3-2), one square boss II (4-3-1) being provided on the bottom surface of the insulating top frame (4-3-2) at a position opposite to each square boss II (4-3-1) on the top surface, and a through circular hole II (4-3-3) penetrating the square boss II (4-3-1) and the insulating top frame (4-3-2) being provided on the center line connecting each square boss II (4-3-1) on the top and bottom surfaces vertically.

2. The electric furnace device for component fire protection design and fire supervision according to claim 1, characterized in that: The eight ends of the four well-shaped inner ribs (4-1-1) of the well-shaped heat-insulating clamping grid (4-1) are respectively connected to a horizontally placed bolt plate (4-1-2), a through bolt plate hole (4-1-3) is provided at the center of each bolt plate (4-1-2), and an outer heat-insulating layer (4-1-4) with a square cross-section is wrapped around the outer surface of the well-shaped inner ribs (4-1-1).

3. The electric furnace device for component fire protection design and fire supervision according to claim 1 is characterized in that: The mobile terminal functions are as follows: The first item is to be capable of sending control instructions to the wireless communication module in the control and display transmission box (2) by means of wireless communication and receiving execution status, such as fault status, and in particular, obtaining temperature data recorded by the data acquisition module in real time through the wireless communication module; Item 2: It has the functions of voice transcription text input and key input; Item 3: It has the function of taking photos and photo timer, that is, the photos taken are accompanied by the time from the start of the test as zero, in seconds; Item 4: The main display interface of the mobile terminal includes: a control and setting module, a process monitoring module, a report generation module, a database module, and a package transmission module, wherein: (1) The functions of the control and setting module include: connection or disconnection control of the mobile terminal and the wireless communication module, one-key synchronization of the mobile terminal display time and the control display transmission box (2) built-in objective time of the control module, synchronous control test start and temperature data recording start, asynchronous control test end and temperature data recording end, table fill-in input time and corresponding furnace body (1) target temperature value, setting alarm threshold of each additional thermocouple (6) connected to the cable part (2-4); (2) The functions of the process monitoring module include: displaying the wireless connection status between the mobile terminal and the wireless communication module, displaying the operating fault status of each component of the electric furnace device, displaying the real-time development status of the "temperature-time" of each additional thermocouple (6) connected to the cable part (2-4) and the furnace cavity thermocouple (3) and the corresponding alarm threshold reaching status; (3) The functions of the report generation module include: A. General information filling page, such as project name, time and location, fire protection sampling information, and fire protection status description; B. Temperature result page, which displays the end time of temperature data recording and the "temperature-time" process of each additional thermocouple (6) connected to the cable part (2-4) and the furnace chamber thermocouple (3); C. Typical time photo display page, which inserts sample photos taken during the test with relative time; D. Supervision test problem and conclusion page, which inputs text into the problem description box and the conclusion box respectively; In addition, when clicking to enter any page A~D, the other pages will be automatically minimized and automatically saved; (4) Database module functions include: checking the thermal performance, structural requirements and styles of commonly used fire protection materials, and corresponding national and local standard information; (5) The functions of the package transmission module include: converting the "temperature-time" data of the whole process obtained by the process monitoring module into a spreadsheet, merging the pages of the report generation module into a PDF file, and transmitting them to a computer, an email address, and sending them to the owner of the supervision inspection as needed through a wireless network; (6) In addition, the package transmission module can only be accessed after the temperature data recording is completed. When entering any module from (1) to (5), the other modules are minimized and saved automatically.

4. A method for using the component fire protection design and fire supervision electric furnace device according to claim 1, characterized in that: The process is as follows: S1. Determine the test scenario: The test scenario is determined according to the application needs. Among them, S1A is a laboratory test, which is usually achieved by using the control and display transmission box (2) of the electric furnace device to control the electric furnace device; S1B is an on-site supervision test, which is usually achieved by using a mobile terminal to control the electric furnace device. S2. Place the device on site: Move the electric furnace device to the site and place it in a stable position; S3. Installation of test samples: The test sample can be a flat square cubic sample (7) or a cylindrical sample (8); S3A. When the cubic specimen (7) is used, the installation steps are as follows: The first step is to use a restrained insulation assembly I (4A), that is, to place a cubic specimen (7) between two well-shaped insulation clamping grids (4-1), and to place an insulation lateral top block (4-2) between eight pairs of bolt plates (4-1-2) facing each other on the two well-shaped insulation clamping grids (4-1), and the top pressure surfaces I (4-2-5) of the eight insulation lateral top blocks (4-2) are all in contact with the surrounding vertical surfaces of the cubic specimen (7); In the second step, the screw rods (4-4-1) of the eight bolts (4-4) are respectively inserted into the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1) and the through circular holes I (4-2-3) of the eight heat-insulating lateral top blocks (4-2) in sequence, and extend out from the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the upper well-shaped heat-insulating clamping grille (4-1) and are screwed to the eight bolt caps (4-5). The end plate (4-4-2) of each bolt (4-4), each bolt plate (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1), and each heat-insulating lateral top block (4-2) are screwed to the ... The lower square boss I (4-2-1) of the thermal lateral top block (4-2) is in close surface contact from bottom to top, and the upper square boss I (4-2-1) of each insulating lateral top block (4-2), each bolt plate (4-1-2) of the upper well-shaped insulating clamping grid (4-1), and each bolt cap (4-5) are in close surface contact from bottom to top, so that the upper and lower well-shaped insulating clamping grids (4-1) provide sufficient clamping force to the cubic specimen (7) in the thickness direction, and the eight insulating lateral top blocks (4-2) located around the cubic specimen (7) provide sufficient clamping force to the cubic specimen (7) in the horizontal plane; Step 3: insert a high-filling strip block (4-6-1) into each of the four strip-shaped gap regions formed between the eight insulating lateral top blocks (4-2), and insert a high-filling corner block (4-6-2) into each of the four corner-shaped gap regions formed between the eight insulating lateral top blocks (4-2), so that the bottom surfaces of the four high-filling strip blocks (4-6-1), the bottom surfaces of the four high-filling corner blocks (4-6-2), the bottom surfaces of the eight end plates (4-4-2) and the lower surface of the outer insulation layer (4-1-4) of the lower well-shaped insulating clamping grid (4-1) are in the same plane; Step 4: tightly embed the entire assembly formed in the first to third steps into the L-shaped inward-retracted eaves (1-3) of the furnace body (1); S3B. When a cylindrical specimen (8) is used, the installation steps are as follows: The first step is to use the constrained insulation assembly II (4B), that is, to set an insulation lateral top frame (4-3) on the well-shaped insulation clamping grid (4-1) of the lower layer, set the cylindrical sample (8) in the sample hole (4-3-4) at the center of the insulation lateral top frame (4-3), and set another well-shaped insulation clamping grid (4-1) on the insulation lateral top frame (4-3); In the second step, the screw rods (4-4-1) of the eight bolts (4-4) are respectively inserted into the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1), and the eight through-holes II (4-3-3) of the heat-insulating lateral top frame (4-3), extending from the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the upper well-shaped heat-insulating clamping grille (4-1), and screwed with the eight bolt caps (4-5), and the end plate (4-4-2) of each bolt (4-4), each bolt plate (4-1-2) of the lower well-shaped heat-insulating clamping grille (4-1), and the heat-insulating lateral top frame (4-3) are respectively inserted into the eight through-holes II (4-3-3) of the heat-insulating lateral top frame (4-3), and extending from the bolt plate holes (4-1-3) of the eight bolt plates (4-1-2) of the upper well-shaped heat-insulating clamping grille (4-1), and screwed with the eight bolt caps (4-5). Each bottom square boss II (4-3-1) of the lateral top frame (4-3) is in close surface contact from bottom to top, and each top square boss II (4-3-1) of the insulating lateral top frame (4-3), each bolt plate (4-1-2) of the upper well-shaped insulating clamping grid (4-1), and each bolt cap (4-5) are in close surface contact from bottom to top; the upper and lower well-shaped insulating clamping grids (4-1) provide sufficient clamping force to the cylindrical specimen (8) in the thickness direction, and the insulating lateral top frame (4-3) located around the cylindrical specimen (8) provides sufficient clamping force to the cylindrical specimen (8) in the horizontal plane; Step 3: insert a short filling strip block (4-7-1) into each of the four strip-shaped gap areas formed between the eight bolt plates (4-1-2) of the lower well-shaped heat-insulating clamping grid (4-1) below the heat-insulating lateral top frame (4-3), and insert a short filling corner block (4-7-2) into each of the four corner-shaped gap areas formed between the eight bolt plates (4-1-2), so that the bottom surfaces of the four short filling strip blocks (4-7-1), the bottom surfaces of the four short filling corner blocks (4-7-2), the bottom surfaces of the eight end plates (4-4-2) and the lower surface of the outer insulation layer (4-1-4) of the lower well-shaped heat-insulating clamping grid (4-1) are in the same plane; Step 4: tightly embed the entire assembly formed in the first to third steps into the L-shaped inward-retracted eaves (1-3) of the furnace body (1); S4. Back-fire surface insulation selection: select whether to adopt adiabatic boundary conditions for the non-heating surface of the test sample, where S4A uses an insulating cover (5), that is, simulates adiabatic boundary conditions on the non-heating surface of the test sample, and S4B does not use an insulating cover (5), that is, simulates natural convection boundary conditions on the non-heating surface of the test sample; S4A. When the sample to be tested is a cubic sample (7), the steps for installing the thermal insulation cover (5) are as follows: The first step is to buckle the heat-insulating cover (5) onto the upper well-shaped heat-insulating clamping grid (4-1) of the constrained heat-insulating component I (4A), and align and buckle the well-shaped groove (5-5) on the bottom of the heat-insulating cover (5) with the upper well-shaped heat-insulating clamping grid (4-1), so that the four rectangular convex surfaces (5-6) and the four square convex surfaces (5-7) are in contact with the upper surfaces of the cubic sample (7) and the heat-insulating filling block I (4-6); Step 2: fix an additional thermocouple (6) to the thermocouple fixing through hole I (5-1), the thermocouple fixing through hole II (5-2), and the thermocouple fixing through hole III (5-3) of the thermal insulation cover (5), respectively, so that the ends of the three additional thermocouples (6) are in contact with the upper surface of the cubic sample (7), and the three additional thermocouples (6) are connected to the data acquisition module through the cable parts (2-4); When the sample to be tested is a cylindrical sample (8), the steps for installing the thermal insulation cover (5) are as follows: The first step is to buckle the heat-insulating cover (5) onto the upper well-shaped heat-insulating clamping grid (4-1) of the constrained heat-insulating assembly II (4B), and align and buckle the well-shaped groove (5-5) on the bottom of the heat-insulating cover (5) with the upper well-shaped heat-insulating clamping grid (4-1), so that the four rectangular convex surfaces (5-6) and the four square convex surfaces (5-7) are in contact with the upper surface of the cylindrical sample (8) and the heat-insulating top frame (4-3-2); Step 2: fix an additional thermocouple (6) to the thermocouple fixing through hole I (5-1), the thermocouple fixing through hole II (5-2), and the thermocouple fixing through hole III (5-3) of the thermal insulation cover (5), respectively, so that the ends of the three additional thermocouples (6) are in contact with the upper surface of the cylindrical sample (8), and the three additional thermocouples (6) are connected to the data acquisition module through the cable parts (2-4); The upper surface of S4B, the cubic specimen (7) or the cylindrical specimen (8) is exposed to the indoor air except for the area in close contact with the lower surface of the upper well-shaped thermal insulation clamping grid (4-1); S5. Preparation for furnace temperature setting: According to the needs of the current test, the equivalent heating curve "temperature-time" data to be input into the control display transmission box (2) or the mobile terminal is determined by calculation. The specific preparation steps are as follows: The first step is to determine the target fire resistance limit t=x hours, t≥2.00h; Step 2: Select the temperature rise curve specified in GB / T 9978.1 or the "slow temperature rise curve", "HC temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve", "tunnel fire RABT temperature rise curve" specified in GB / T 26784, and substitute time t into the corresponding "temperature-time relationship" to obtain the target temperature T; The third step is to set the equivalent temperature rise curve according to the target fire resistance limit; Case 1: For the selection of the heating curve specified in GB / T 9978.1 or the "slow heating curve" specified in GB / T 26784: when t=2.00h, set "the furnace temperature is linearly increased to the target temperature T in the furnace within 0.50h, and the temperature is kept constant until t=2.00h" through the control display transmission box (2) or the mobile terminal; when t=3.00h, set "the furnace temperature is linearly increased to the target temperature T in the furnace within 1.00h, and the temperature is kept constant until t=3.00h" through the control display transmission box (2) or the mobile terminal, and both are executed by the control module after the test starts; Case 2: For the "HC temperature rise curve", "outdoor fire temperature rise curve", "electrical fire temperature rise curve" and "tunnel fire RABT temperature rise curve" specified in GB / T 26784: set "the furnace temperature rises linearly to the target temperature T in the furnace within 1.00h and continues to keep warm for t=x hours" through the control display transmission box (2) or the mobile terminal, and let the control module execute it after the test starts; S6. Control mode selection: According to the scene operation test process determined by S1, S6A is to use the control display transmission box (2); S6B is to use a mobile terminal; S6A, control test process using the control display transmission box (2): The first step is to start the electric furnace device by powering on the cable unit (2-4) and the control unit (2-3); Step 2: Input the prepared equivalent temperature rise curve in the "temperature-time" mode by pressing a button on the control unit (2-3) or by touching the screen on the display unit (2-2), and set the alarm threshold of each additional thermocouple (6) connected to the cable unit (2-4); Step 3: The control unit (2-3) synchronously controls the start of the test and the start of temperature data recording, and the display unit (2-2) is used to observe the real-time "temperature-time" curve of each additional thermocouple (6) and the furnace cavity thermocouple (3) under test, the operating failure of each component, the visual prompt of the alarm threshold, and the working condition of the wireless communication module; Step 4: Control the test to end or the temperature data recording to end through the control unit (2-3) or the display unit (2-2); Step 5: Copy the electronic spreadsheet data recorded by the data acquisition module through the cable unit (2-4), and turn off the power to the electric furnace device; S6B, control test process using mobile terminal: The first step is to start the electric furnace device by powering on the cable part (2-4) and the control part (2-3), start the wireless communication module by the control part (2-3) and observe its working condition by the display part (2-2); Step 2: Connect the mobile terminal to the wireless communication module by wireless communication, synchronize the time displayed on the mobile terminal with the objective time built into the control module of the control and display transmission box (2) by one key, input the prepared equivalent temperature rise curve and set the alarm threshold of each additional thermocouple (6) connected to the cable part (2-4) in the control and setting module of the mobile terminal according to the "temperature-time" mode, enter the report generation module and input the project name, time and location, fire protection sampling information, and fire protection status description of the sample to be tested on the general information filling page; Step 3: Synchronize the start of the test and the start of temperature data recording through the control and setting module of the mobile terminal; Step 4: Observe the "temperature-time" real-time curve of each additional thermocouple (6) connected to the cable part (2-4) and the furnace cavity thermocouple (3) through the process monitoring module of the mobile terminal, observe the operating failure of each component and the wireless connection status of the mobile terminal and the wireless communication module, and the visual prompt of the alarm threshold, switch to the typical moment photo display page of the report generation module as needed, take a sample photo and insert it into the page; Step 5: When the test is finished or the temperature data recording is finished through the control and setting module of the mobile terminal, the wireless communication connection between the mobile terminal and the wireless communication module is disconnected, and the electric furnace device is powered off; Step 6: Switch to the supervision test questions and conclusions page of the report generation module, and fill in the test questions and conclusions into the page by voice transcription or key input; Step 7. Enter the package transmission module, merge the pages of the report generation module into a PDF file, convert the "temperature-time" data of the whole process obtained by the process monitoring module into a spreadsheet, and transmit the PDF file and spreadsheet to an email mailbox for backup and send to the fire protection construction party under supervision and inspection through the wireless network; S7. The whole test process is completed: store the electric furnace device and the mobile terminal.

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