CN111609714B

CN111609714B - Steel construction fire-retardant coating efficiency test stove that insulates against heat

Info

Publication number: CN111609714B
Application number: CN202010425045.9A
Authority: CN
Inventors: 孙治堃; 孙宝玉; 周小兵
Original assignee: Nanjing Shangyuan Analytical Instrument Co ltd
Current assignee: Nanjing Shangyuan Analytical Instrument Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-11-09
Anticipated expiration: 2040-05-19
Also published as: CN111609714A

Abstract

The invention relates to a steel structure fireproof coating heat insulation efficiency test furnace, which is applied to the field of fireproof coating heat insulation efficiency test, and the technical scheme is characterized in that: contain the furnace body, be equipped with apron and logical groove on the furnace body respectively, still be equipped with a plurality of flame guns that are linked together with the gas pipeline on the lateral wall of furnace body, be equipped with the support frame on the lateral wall of furnace body, it is connected with the movable plate, a plurality of to slide along the horizontal direction on the support frame the flame gun all erects on the movable plate, and is a plurality of the flame gun is linked together with the gas pipeline through plastic hose respectively, still seted up burning hole, a plurality of along length direction on the furnace body the flame jet of flame gun extends to inside the furnace body from burning hole department, still be equipped with the pneumatic cylinder that is used for driving the movable block along support frame length direction removal on the support frame. The invention has the technical effects that: the steel can be uniformly burned in the detection process, so that the accuracy of a final detection result is improved.

Description

Steel construction fire-retardant coating efficiency test stove that insulates against heat

Technical Field

The invention relates to the technical field of fireproof coating heat insulation efficiency test, in particular to a steel structure fireproof coating heat insulation efficiency test furnace.

Background

The steel is a non-combustible building material and has the characteristics of earthquake resistance, bending resistance and the like; in practical application, the steel can relatively increase the load capacity of a building and meet the requirement of aesthetic appearance of the building design. However, steel as a building material has some inevitable defects in fire protection, and its mechanical properties such as yield point, tensile strength and elastic modulus are all sharply reduced due to the increase of temperature. In order to overcome the fire-proof deficiency of steel structure materials in practical application, the steel structure materials are usually subjected to fire-proof treatment by coating fire-proof paint on the surface of the steel structure. In the prior art, a test furnace is generally used for detecting the heat insulation efficiency of the fireproof coating on the surface of a steel structure.

As shown in fig. 1, a fire retardant coating heat insulation efficiency test furnace in the prior art comprises a furnace body 1 with an opening at the top, a cover plate 2 for closing the opening of the furnace body 1 is erected on the furnace body 1, a through groove 4 for receiving steel 3 to be tested is formed in the side wall of the furnace body 1, fire retardant coating is coated on the surface of the steel 3, a gas pipeline 5 is connected to the side wall of the furnace body 1, and a plurality of fire nozzles 6 extending into the furnace body 1 are connected to the gas pipeline 5; the mode simulation conflagration of continuously firing is carried out steel 3 of erectting on logical groove 4 through flame gun 6 to the staff can detect the thermal-insulated efficiency of the fire retardant coating of coating on steel 3.

The above prior art solutions have the following drawbacks: above-mentioned test furnace is at actual detection's in-process, because flame of flame gun spun is the beam form for the steel construction surface of rectangular shape is difficult to by even firing, leads to final testing result's precision relatively poor.

Disclosure of Invention

The invention aims to provide a steel structure fireproof coating heat insulation efficiency test furnace, which has the advantages that: the steel can be uniformly burned in the detection process, so that the accuracy of a final detection result is improved.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a steel construction fire-retardant coating efficiency test stove that insulates against heat, contains furnace body and gas pipeline, be equipped with apron and logical groove on the furnace body respectively, still be equipped with a plurality of flame guns that are linked together with the gas pipeline on the lateral wall of furnace body, be equipped with the support frame on the lateral wall of furnace body, it is connected with the movable plate, a plurality of to slide along the horizontal direction on the support frame the flame guns all erects on the movable plate, and is a plurality of the flame guns is linked together with the gas pipeline through plastic hose respectively, still seted up burning hole, a plurality of on the furnace body the flame jet of flame guns extends to inside the furnace body from burning hole department, still be equipped with the pneumatic cylinder that is used for driving the movable block to remove along support frame length direction on the support frame.

Through above-mentioned technical scheme, the pneumatic cylinder can drive the movable block along support frame length direction reciprocating motion, and a plurality of flame guns on the movable block can be along firing hole reciprocating motion under the drive of movable block to flame gun spun can carry out even firing to the inside steel of furnace body, thereby has improved final testing result's precision.

The invention is further configured to: the fire-jet hole cover of flame gun is equipped with and divides the firetube, divide and offer a plurality of branch fireholes that set up towards the steel direction along length direction on the firetube.

Through above-mentioned technical scheme, divide setting up of fire tube to make flame gun spun can be blocked and shunted by dividing the fire tube to flame can carry out even firing to steel from the even blowout of a plurality of branch flame mouths department, thereby has further promoted the firing degree of consistency on steel surface.

The invention is further configured to: the movable plate is provided with a fire retardant plate, the fire retardant plate is positioned between the burning hole and the plurality of flame guns, and fire outlets of the plurality of flame guns penetrate through the fire retardant plate respectively and extend into the furnace body.

Through above-mentioned technical scheme, the setting of back-fire relief plate has the effect that blocks flame, has reduced that part flame from ignition hole department spreads to flame gun department and leads to the possibility that flame gun shell is burnt out.

The invention is further configured to: the furnace body is internally provided with a first exhaust pipe, the first exhaust pipe is positioned above steel, the first exhaust pipe is respectively communicated with a plurality of first exhaust pipes extending to the top of the steel, a first opening cover is arranged at the opening of each first exhaust pipe, and an exhaust fan communicated with the first exhaust pipe is further arranged on the furnace body.

Through above-mentioned technical scheme, can carry out convulsions operation through first exhaust column and a plurality of first exhaust tube when the air exhauster starts to the waste gas that the steel firing in-process produced can in time be taken out the furnace body, the first mouth of pipe scope of first exhaust tube has been increased in setting up of opening the gauze mask, thereby has further strengthened the effect of bleeding of first exhaust tube.

The invention is further configured to: still be equipped with the second exhaust column that is linked together with first exhaust column in the furnace body, steel is located between first exhaust column and the second exhaust column, it has a plurality of second exhaust columns that extend to the steel below to communicate respectively on the second exhaust column, and is a plurality of first exhaust column corresponds each other along vertical direction with a plurality of second exhaust columns respectively, the mouth of pipe department of second exhaust column is equipped with the uncovered mouth of the second gauze mask.

Through the technical scheme, the arrangement of the second exhaust pipes and the plurality of second exhaust pipes further accelerates the efficiency of exhaust gas extraction; simultaneously, relative first exhaust tube and the second exhaust tube that sets up carry out the operation of bleeding from the upper and lower both sides of steel respectively for the flame on steel surface can extend to both sides about the steel under the drive of air current, thereby has further promoted the firing degree of consistency on steel surface.

The invention is further configured to: the first open cover and the second open cover are respectively connected with asbestos nets through supports.

Through above-mentioned technical scheme, the setting of asbestos gauge has the effect of blockking flame to make the uncovered cover of first uncovered cover and second difficult being burnt by the flame that extends to the asbestos gauge direction.

The invention is further configured to: still be equipped with the exhaust fan that the part extends to in the furnace body on the lateral wall of furnace body, be equipped with pressure sensor in the furnace body, pressure sensor sets up with the exhaust fan linkage.

Through above-mentioned technical scheme, pressure sensor can detect the pressure in the furnace body, and when the pressure in the furnace body was higher than the upper limit of experimental standard pressure, the opportunity of airing exhaust starts the operation of airing exhaust to the furnace body to pressure in the furnace body can resume normal level fast, has reduced the too high possibility that influences final testing result in furnace body internal pressure, thereby has further promoted testing result's precision.

The invention is further configured to: two erectors have set firmly relatively respectively on the top surface of furnace body, two rotate respectively on the erector and be connected with fixed pulley and wire reel, two around being equipped with the cable on the wire reel respectively, the one end that the wire reel was kept away from to the cable is around setting up fixed pulley and fixed connection on the apron, still is equipped with respectively on two erectors to be used for driving wire reel pivoted motor.

Through above-mentioned technical scheme, can drive two wire reels when two motors start and rotate and carry out synchronous receipts line or unwrapping wire operation, under the switching-over effect of fixed pulley, the cable can drive the apron and go up and down along vertical direction to reached automatic effect, labour saving and time saving that goes up and down to the apron.

The invention is further configured to: the rotary furnace is characterized in that the lifting frame is further provided with a rotation resisting rod extending to the furnace body along the vertical direction, the cover plate is respectively provided with rotation resisting blocks along two side walls of the length direction, rotation resisting holes matched with the rotation resisting rods are formed in the rotation resisting blocks, and the rotation resisting rods penetrate through the rotation resisting holes.

Through the technical scheme, the rotation blocking rod is arranged in the rotation blocking hole in a penetrating mode, so that the cover plate is difficult to rotate in the lifting process, the possibility that the cover plate is difficult to seal the furnace body after being put down due to rotation of the cover plate in the lifting process is reduced, and the stability of the cover plate in the lifting process is improved.

The invention is further configured to: the lifting frame is further provided with a U-shaped fixture block, and the distance between the horizontal end of the fixture block and the fixed pulley is smaller than the wire diameter of the cable.

Through above-mentioned technical scheme, the setting of fixture block has the effect of carrying out the restriction to the cable for the cable is difficult for breaking away from the fixed pulley under the effect of external force, so that the drive apron that the cable can be stable goes up and down.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the surface of the steel can be uniformly burnt by the flame gun in the test process, so that the accuracy of the final detection result is improved;

2. the flame on the surface of the steel product can extend to the upper side and the lower side of the steel product under the driving of the first exhaust pipe and the second exhaust pipe, so that the burning uniformity of the surface of the steel product is further improved;

3. the apron can go up and down by automatic stabilization, has solved the artifical problem that the apron wastes time and energy that opens and shuts.

Drawings

FIG. 1 is a schematic structural diagram of a prior art fire retardant coating insulation efficiency test furnace.

Fig. 2 is a schematic view of the overall structure of the present embodiment.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is a schematic structural diagram of the fire dividing pipe according to the embodiment.

Fig. 5 is a schematic structural diagram for embodying the first exhaust pipe in the present embodiment.

Fig. 6 is a schematic cross-sectional view of the pressure sensor according to the present embodiment.

Fig. 7 is a schematic structural diagram for embodying the latch according to the present embodiment.

Reference numerals: 1. a furnace body; 2. a cover plate; 3. steel material; 4. a through groove; 5. a gas pipeline; 6. a flame gun; 7. a support frame; 8. moving the plate; 9. a plastic hose; 10. burning the hole; 11. a hydraulic cylinder; 12. fire dividing pipes; 13. a fire distributing port; 14. a fire barrier plate; 15. a first exhaust pipe; 16. a first exhaust tube; 17. a first open cover; 18. an exhaust fan; 19. a second exhaust pipe; 20. a second extraction tube; 21. a second open cover; 22. an asbestos web; 23. an exhaust fan; 24. a pressure sensor; 25. a lifting frame; 26. a fixed pulley; 27. a wire spool; 28. a cable; 29. a motor; 30. a rotation blocking rod; 31. a rotation resistance block; 32. a rotation blocking hole; 33. a clamping block; 34. a chute; 35. and (4) a bracket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides a steel construction fire-retardant coating efficiency test furnace that insulates against heat, as shown in fig. 2 and fig. 3, contain furnace body 1, gas pipeline 5 and control system, offer on the furnace body 1 and be used for accepting logical groove 4 that waits to detect steel 3, steel 3 wears to establish and partly extends furnace body 1 respectively at logical inslot 4 and both ends, furnace body 1 sets up the firing hole 10 corresponding with steel 3 on the lateral wall along width direction, firing hole 10 sets up along 1 length direction of furnace body, support frame 7 has set firmly along the horizontal direction on 1 lateral wall of furnace body of firing hole 10 below, two spouts 34 that are parallel to each other are seted up along length direction on the support frame 7, slide through the gyro wheel respectively in two spouts 34 and be connected with movable plate 8, movable plate 8 is equipped with back-fire relief plate 14 towards following vertical direction on the terminal surface of firing hole 10.

As shown in fig. 2 and 3, a plurality of flame guns 6 communicated with the gas pipeline 5 through plastic hoses 9 are fixedly connected to the moving plate 8, and the flame guns 6 are controlled by a control system; the fire nozzles of the plurality of fire guns 6 respectively penetrate through the fire retardant plates 14 and the firing holes 10 in sequence and extend into the furnace body 1, the fire retardant plates 14 can block flames spreading outwards from the firing holes 10, the effect of isolating the fire guns 6 from the flames is achieved, and the possibility that the fire guns 6 are burnt by the spread flames is reduced; the support frame 7 is also fixedly connected with a hydraulic cylinder 11 for driving the movable plate 8 to reciprocate along the length direction of the support frame 7, and the hydraulic cylinder 11 is controlled by a control system. Therefore, in the detection process, under the control of the control system, the hydraulic cylinder 11 can be started and drive the movable plate 8 to move in a reciprocating manner, the fire retardant plate 14 and the flame guns 6 can be driven by the movable plate 8 to move in a reciprocating manner along the burning holes 10, so that flame sprayed by the flame guns 6 can uniformly burn all parts of the steel 3, the possibility that the steel 3 is not uniformly burnt to influence the maintenance result is reduced, and the accuracy of the final detection result is improved.

As shown in fig. 2 and 4, the flame ports of the flame guns 6 are fixedly sleeved with flame dividing pipes 12, and the flame dividing pipes 12 are perpendicular to the flame ports of the flame guns 6 and are uniformly provided with a plurality of flame dividing ports 13 on the end surface facing the steel 3. Therefore, the flame sprayed by the flame gun 6 can be shunted by the plurality of flame dividing ports 13 on the flame dividing pipe 12, the flame range sprayed by the flame gun 6 is improved, the burning range of the single flame gun 6 to the steel 3 is enlarged, and the burning uniformity of the steel 3 is further improved.

As shown in fig. 2 and 5, a first exhaust pipe 15 and a second exhaust pipe 19 parallel to the steel 3 are further connected in the furnace body 1, the first exhaust pipe 15 and the second exhaust pipe 19 are communicated with each other, the steel 3 is located between the first exhaust pipe 15 and the second exhaust pipe 19, the first exhaust pipe 15 is evenly communicated with a plurality of first exhaust pipes 16 extending to the upper side of the steel 3, the second exhaust pipe 19 is evenly communicated with a plurality of second exhaust pipes 20 extending to the lower side of the steel 3, pipe openings of the first exhaust pipes 16 and the second exhaust pipes 20 are fixedly sleeved with a first open cover 17 and a second open cover 21, and the first open cover 17 and the second open cover 21 are both arranged towards the direction of the steel 3 and correspond to each other two by two in the vertical direction.

As shown in fig. 2 and 5, the openings of the first and second open covers 17 and 21 are respectively connected with asbestos nets 22 through brackets 35, and the asbestos nets 22 are respectively located on two sides of the steel material 3 in the vertical direction; an exhaust fan 18 communicated with the first exhaust pipe 15 is fixedly arranged at the top of the furnace body 1, and the exhaust fan 18 is controlled by a control system. Therefore, the worker can start the exhaust fan 18 through the control system, and when the exhaust fan 18 is started, the exhaust fan 18 can perform air extraction operation on the furnace body 1 through the plurality of first exhaust pipes 16 and the plurality of second exhaust pipes 20, so that waste gas generated by burning the steel 3 in the furnace body 1 can be discharged in time, and the influence of the waste gas on the burning process of the steel 3 is reduced; meanwhile, the plurality of first exhaust pipes 16 and the plurality of second exhaust pipes 20 respectively form air flows on two sides of the steel 3 in the vertical direction while performing air exhaust operation, so that flames sprayed by the flame guns 6 extend to two sides of the steel 3 in the vertical direction under the driving of the air flows, and the burning uniformity of the steel 3 is further improved; the arrangement of the asbestos cloth 22 reduces the possibility that flames extending to the two sides of the steel 3 extend into the first open cover 17 and the second open cover 21 under the drive of airflow; has the function of protecting the first protective cover and the second protective cover.

As shown in fig. 6, a pressure sensor 24 is fixedly arranged on the inner wall of the furnace body 1, the pressure sensor 24 is used for detecting the pressure inside the furnace body 1, and when the pressure value inside the furnace body 1 is higher than the trigger value of the pressure sensor 24, the pressure sensor 24 will trigger and send a feedback signal to the control system; an exhaust fan 23 which partially extends into the furnace body 1 is also embedded in the side wall of the furnace body 1, and the exhaust fan 23 is controlled by a control system; when the control system receives a feedback signal from the pressure sensor 24, it synchronously sends a control signal to the exhaust fan 23 to start the exhaust fan 23. Therefore, the staff can set up pressure sensor 24's trigger value as the upper limit value of experimental standard pressure, when pressure in furnace body 1 is higher than the upper limit value of standard pressure, pressure sensor 24 can be triggered and make exhaust fan 23 can start the operation of airing exhaust in step, so that the pressure in furnace body 1 can reply normally fast, thereby reached the effect of carrying out automatically regulated to the pressure of furnace body 1 inside, the influence of furnace body 1 internal pressure to the testing result has been reduced, thereby further promoted the precision of testing result.

As shown in fig. 7, a cover plate 2 for closing the opening is erected at the opening at the top of the furnace body 1, two lifting frames 25 arranged along the vertical direction are respectively and fixedly arranged at the top of the furnace body 1, the cover plate 2 is positioned between the two lifting frames 25, the top of the lifting frames 25 are respectively and rotatably connected with a fixed pulley 26 and a wire spool 27, the fixed pulley 26 is positioned above the wire spool 27, two motors 29 for driving the wire spool 27 to rotate are respectively arranged on the lifting frames 25, and the motors 29 are controlled by a control system; a cable 28 with the end part fixedly connected with the wire spool 27 is wound on the wire spool 27, and one end of the cable 28 far away from the wire spool 27 is wound on the fixed pulley 26 and fixedly connected to the cover plate 2; the lifting frame 25 is further connected with a U-shaped fixture block 33 through a bolt, the fixed pulley 26 is positioned in the fixture block 33, and the distance between the fixed pulley 26 and the end face, far away from the lifting frame 25, of the fixture block 33 is smaller than the wire diameter of the cable 28; so that the cable 28 is not easily detached from the inside of the fixed sheave 26 by an external force.

As shown in fig. 7, the crane 25 is further fixedly connected with a rotation blocking rod 30, the rotation blocking rod 30 is fixedly connected with the furnace body 1 along the vertical direction, one end of the crane 25 is far away from the crane, the cover plate 2 is connected with a rotation blocking block 31 towards the end face of the rotation blocking rod 30 through a bolt, a rotation blocking hole 32 matched with the rotation blocking rod 30 is formed in the rotation blocking block 31, and the rotation blocking rod 30 is arranged in the rotation blocking hole 32 in a penetrating mode. Therefore, the worker can control the two motors 29 to synchronously start and drive the two wire reels 27 to synchronously take up or pay off the wires by the control system, so that the cover plate 2 can be driven by the cable 28 to lift in the vertical direction; hinder the setting that the bull stick 30 wore to establish in hindering commentaries on classics hole 32 and have and carry out spacing effect to apron 2 for apron 2 is difficult to rotate at the in-process that goes up and down, thereby has promoted the stability of apron 2 lift in-process.

The implementation principle of the embodiment is as follows: in the process that the flame guns 6 burn the steel 3, the movable plate 8 drives the flame guns 6 to reciprocate along the burning holes 10 under the driving of the hydraulic cylinder 11, so that the flame guns 6 can burn different positions of the steel 3; the fire distributing pipe 12 sleeved on the flame gun 6 can distribute the flame sprayed by the flame gun 6, so that the burning range of the flame gun 6 to the steel 3 is enlarged; the first exhaust tube 16 and the second exhaust tube 20 can drive the flame sprayed by the flame gun 6 to extend to two sides of the steel 3 along the vertical direction while performing air extraction operation, so that the burning range of the flame gun 6 on the steel 3 is further enlarged; therefore, flame sprayed by the flame spraying gun 6 can uniformly burn the steel 3 in the furnace body 1, and the accuracy of a final detection result is improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a steel construction fire-retardant coating efficiency test furnace that insulates against heat, contains furnace body (1) and gas pipeline (5), be equipped with apron (2) and lead to groove (4) on furnace body (1) respectively, still be equipped with flame gun (6) that a plurality of and gas pipeline (5) are linked together on the lateral wall of furnace body (1), its characterized in that: the side wall of the furnace body (1) is provided with a support frame (7), a movable plate (8) is connected to the support frame (7) in a sliding manner along the horizontal direction, a plurality of flame guns (6) are all erected on the movable plate (8), the flame guns (6) are respectively communicated with a gas pipeline (5) through plastic hoses (9), the furnace body (1) is further provided with a burning hole (10) along the length direction, flame ports of the flame guns (6) extend from the burning hole (10) to the inside of the furnace body (1), and the support frame (7) is further provided with a hydraulic cylinder (11) for driving the movable block to move along the length direction of the support frame (7);

a first exhaust pipe (15) is arranged in the furnace body (1), the first exhaust pipe (15) is positioned above the steel (3), the first exhaust pipe (15) is respectively communicated with a plurality of first exhaust pipes (16) extending above the steel (3), a first open cover (17) is arranged at the pipe orifice of each first exhaust pipe (16), and an exhaust fan (18) communicated with the first exhaust pipe (15) is further arranged on the furnace body (1);

a second exhaust pipe (19) communicated with the first exhaust pipe (15) is further arranged in the furnace body (1), the steel (3) is located between the first exhaust pipe (15) and the second exhaust pipe (19), the second exhaust pipe (19) is respectively communicated with a plurality of second exhaust pipes (20) extending to the lower side of the steel (3), the plurality of first exhaust pipes (16) respectively correspond to the plurality of second exhaust pipes (20) along the vertical direction, and a second open cover (21) is arranged at the pipe orifice of each second exhaust pipe (20);

the flame on the surface of the steel material can be driven by the first exhaust pipe (16) and the second exhaust pipe (20) to extend to the upper side and the lower side of the steel material, so that the burning uniformity of the surface of the steel material is further improved.

2. The steel structure fireproof coating heat insulation efficiency test furnace according to claim 1, characterized in that: the fire-jet opening cover of the fire-jet gun (6) is provided with a fire-splitting pipe (12), and a plurality of fire-splitting openings (13) arranged towards the direction of the steel (3) are formed in the fire-splitting pipe (12) along the length direction.

3. The steel structure fireproof coating heat insulation efficiency test furnace according to claim 1, characterized in that: be equipped with back-fire relief board (14) on movable plate (8), back-fire relief board (14) are located burning hole (10) and a plurality of flame guns (6), and a plurality of flame outlets of flame guns (6) wear to establish respectively and extend to furnace body (1) in back-fire relief board (14).

4. The steel structure fireproof coating heat insulation efficiency test furnace according to claim 1, characterized in that: the first open cover (17) and the second open cover (21) are respectively connected with an asbestos net (22) through a bracket (35).

5. The steel structure fireproof coating heat insulation efficiency test furnace according to claim 1, characterized in that: still be equipped with exhaust fan (23) that the part extends to in furnace body (1) on the lateral wall of furnace body (1), be equipped with pressure sensor (24) in furnace body (1), pressure sensor (24) set up with exhaust fan (23) linkage.

6. The steel structure fireproof coating heat insulation efficiency test furnace according to claim 1, characterized in that: two erectors (25), two have set firmly relatively respectively on the top surface of furnace body (1) crane (25) go up to rotate respectively on crane (25) and be connected with fixed pulley (26) and wire reel (27), two wire reel (27) are gone up respectively around being equipped with cable (28), fixed pulley (26) and fixed connection are around establishing in wire reel (27) to cable (28) one end, still are equipped with respectively on two erectors (25) and are used for driving wire reel (27) pivoted motor (29).

7. The test furnace for the heat insulation efficiency of the steel structure fireproof coating according to claim 6, wherein: still be equipped with on crane (25) and extend to the commentaries on classics pole (30) that hinder of furnace body (1) along vertical direction, apron (2) are equipped with respectively on length direction's the both sides wall and hinder commentaries on classics piece (31), hinder commentaries on classics hole (32) of seting up and hindering commentaries on classics pole (30) assorted on hindering commentaries on classics piece (31), hinder commentaries on classics pole (30) and wear to establish in hindering commentaries on classics hole (32).

8. The test furnace for the heat insulation efficiency of the steel structure fireproof coating according to claim 6, wherein: the lifting frame (25) is further provided with a U-shaped fixture block (33), and the distance between the horizontal end of the fixture block (33) and the fixed pulley (26) is smaller than the wire diameter of the cable (28).