CN217237927U

CN217237927U - Building materials incombustibility test furnace

Info

Publication number: CN217237927U
Application number: CN202220208746.1U
Authority: CN
Inventors: 孙治堃; 孙宝玉; 孙明平
Original assignee: Nanjing Shangyuan Analytical Instrument Co ltd
Current assignee: Nanjing Shangyuan Analytical Instrument Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-19
Anticipated expiration: 2032-01-25

Abstract

The utility model relates to a building materials performance evaluation equipment technical field, concretely relates to building materials incombustibility test stove, it includes the furnace body, temperature-detecting device, elevating gear, the inserted bar, stores pylon and string basket, the heating chamber has been seted up to the top wall of furnace body, the inserted bar is inserted and is established in the heating chamber, the stores pylon setting stretches into the one end in heating chamber at the inserted bar, the stores pylon includes the couple, the couple is equipped with two at least, two at least couples all set up the one end that stretches into the heating chamber at the inserted bar, the equal kickup of one end that the inserted bar was kept away from to two at least couples, be provided with the link on the string basket, the link one-to-one correspondence cover is established on the couple, elevating gear is used for driving the inserted bar and removes along vertical direction, temperature-detecting device is used for detecting the temperature of the different positions in the heating chamber. This application has the effect of convenient laying-out.

Description

Building materials incombustibility test stove

Technical Field

The application relates to the technical field of building material performance evaluation equipment, in particular to a building material non-combustibility test furnace.

Background

The incombustible building material is a building material with poor combustion performance and is mainly applied to buildings with dense personnel. The detection of the combustion performance of the incombustible building material is usually carried out in a building material incombustibility test furnace, which is suitable for a test method for evaluating the combustion performance of the building material under laboratory conditions. The method is mainly characterized in that the computer is adopted for control, the automation degree is high, and the temperature control speed is high; the time and temperature change condition 10min before the test can be checked at any time, so that the traceability is achieved.

In the building material non-combustibility test furnace in the related art, as the lofting bin is fixedly connected with the inserted rod extending into the furnace body, the building material sample is troublesome to place in the lofting bin, and the test efficiency is easily influenced.

SUMMERY OF THE UTILITY MODEL

In order to facilitate lofting, the application provides a building material incombustibility test furnace.

The application provides a building materials incombustibility test furnace adopts following technical scheme:

the utility model provides a building materials incombustibility test furnace, includes furnace body, temperature-detecting device, elevating gear, inserted bar, stores pylon and hangs the basket, the heating chamber has been seted up to the top wall of furnace body, the inserted bar is inserted and is established in the heating chamber, the stores pylon sets up the one end that stretches into the heating chamber at the inserted bar, the stores pylon includes the couple, the couple is equipped with two at least, two at least the couple all sets up the one end that stretches into the heating chamber at the inserted bar, two at least the equal kickup of one end that the inserted bar was kept away from to the couple, be provided with the link on hanging the basket, the link one-to-one cover is established on the couple, elevating gear is used for driving the inserted bar and removes along vertical direction, temperature-detecting device is used for detecting the temperature of the different positions in the heating chamber.

Through adopting above-mentioned technical scheme, hang the basket and be used for the splendid attire sample to link one-to-one cover on hanging the basket is established on the couple, realizes hanging the basket and is connected with dismantling between the inserted bar, and dismantlement between the two is comparatively convenient. Thereby be convenient for will hang the basket and take off from the inserted bar when placing the sample, will hang the basket again after the splendid attire sample and install on the inserted bar through the cooperation of link with the couple, and then reach the effect of convenient laying-out. Meanwhile, the lifting device drives the inserted bar to move along the vertical direction, so that the inserted bar can be conveniently extended into the heating cavity of the furnace body for relevant experiments. And the temperature detection device detects the temperature of different positions in the heating cavity, so that the relevant requirements of the test are met.

Preferably, the hanging rack further comprises a limiting ring, the limiting ring is arranged on the hook, the axis of the limiting ring is vertical, one end, bent upwards, of the hook is located on one side, away from the inserted link, of the limiting ring, and the hanging ring is sleeved between the outer side wall of one end, bent upwards, of the hook and the outer wall of the limiting ring.

Through adopting above-mentioned technical scheme, the link cover is established between spacing ring and couple kickup one side, can carry on spacingly to the link under the cooperation of spacing ring and the crooked one end of couple, can effectively reduce the condition that the link slided on the couple to help improving the stability of string basket in the heating chamber.

Preferably, the lifting device comprises a base pipe, a lifting rod and a connecting rod, the base pipe is arranged on the furnace body, the axis of the base pipe is vertical, the lifting rod slides along the vertical direction and is arranged on the inner wall of the pipe of the base pipe, the connecting rod is arranged on the outer peripheral wall of the lifting rod, the axis of the connecting rod is horizontal, the connecting rod is abutted to the top end wall of the base pipe, and the inserting rod is arranged on the connecting rod.

By adopting the technical scheme, the lifting rod is arranged on the base tube in a sliding manner along the vertical direction, and the connecting rods are vertically connected to the lifting rod; the inserted bar can be driven to move along the vertical direction conveniently through the sliding lifting rod, and the connecting rod can be used as a limiting part of the lifting rod, namely the connecting rod is located at a specified position on the lifting rod. When inserting the inserted bar into the heating chamber, can carry on spacingly to the lifter after the end wall butt of connecting rod and parent tube when the lifter descends, the degree of depth that the inserted bar stretched into the heating chamber this moment just in time accords with test standard, can effectively shorten the time that the debugging inserted bar stretched into heating chamber length, improves test efficiency, helps improving experimental accuracy simultaneously.

Preferably, the furnace body is provided with a limiting device, the limiting device comprises a limiting rod, one end, away from the base tube, of the connecting rod is provided with a limiting groove, a notch of the limiting groove penetrates through the end wall, away from one end of the base tube, of the connecting rod along the horizontal direction, the notch of the limiting groove penetrates through the connecting rod along the vertical direction, and the limiting rod penetrates through the limiting groove along the vertical direction and is abutted to the groove wall of the limiting groove.

Through adopting above-mentioned technical scheme, when needs take out and hang the basket, the lifter that upwards slides, until the gag lever post roll-off from the spacing inslot, rotate the lifter again for hang the basket and be partial to the one side of keeping away from the heating chamber, take off again and hang the basket. The lifting rod is limited during testing through the matching of the limiting rod and the limiting groove, so that the rotation of the lifting rod is reduced; meanwhile, lofting or sampling can be performed on one side far away from the heating cavity, so that the high-temperature environment on one side of the heating cavity can be avoided, and operators are protected.

Preferably, the temperature detection device comprises a first thermocouple, a second thermocouple and a third thermocouple, the first thermocouple is arranged on the furnace body and extends into the heating cavity, the insertion rod penetrates through the insertion hole along the vertical direction, the second thermocouple and the third thermocouple both penetrate through the insertion hole, one end, penetrating through the insertion hole, of the second thermocouple is located below the insertion rod, the axis of the second thermocouple is vertical, a through hole is formed in the hole wall of the insertion hole in a penetrating mode, one end, extending out of the through hole, of the third thermocouple is connected with the limiting ring, and the bottom end of the third thermocouple is located below the limiting ring.

Through adopting above-mentioned technical scheme, first thermocouple, second thermocouple and third thermocouple cooperate, carry out the temperature measurement in the different positions of heating intracavity to satisfy experimental requirement. Wherein second thermocouple and third thermocouple stretch into the heating chamber through the mode that passes the jack, and the third thermocouple stretches out the through-hole and connects on the spacing ring, and the pore wall of jack and through-hole has better limiting displacement to both to make the stability of second thermocouple and third thermocouple position in the heating chamber better.

Preferably, be provided with the connecting rod on the furnace body, it is provided with spacing hole to run through along vertical direction on the connecting rod, spacing hole is relative with the heating chamber, first thermocouple passes spacing hole and stretches into in the heating chamber, the pore wall butt in first thermocouple and spacing hole.

Through adopting above-mentioned technical scheme, first thermocouple regards as the connection base member with the connecting rod to stretch into the heating chamber under the limiting displacement of spacing hole pore wall, make the stability of first thermocouple position in the heating chamber better.

Preferably, be provided with fixing device on the parent tube, fixing device includes first fixed block, second fixed block and retaining member, first fixed block and second fixed block all set up between parent tube and lifter, all be provided with the elastic block on first fixed block and the second fixed block, the elastic block pastes tightly with the periphery wall of parent tube and lifter, the retaining member is located between first fixed block and the second fixed block and is used for locking first fixed block and second fixed block.

Through adopting above-mentioned technical scheme, make the inserted bar shift out the back from the heating chamber at the lifter that slides, the retaining member makes the elastic block on first fixed block and the second fixed block support tightly between parent tube and lifter to fix the lifter comparatively conveniently. Lofting or sampling are carried out again behind the fixed lifter, help improving work efficiency.

Preferably, the locking piece comprises a locking bolt and a rocker, the locking bolt is in threaded connection between the first fixing block and the second fixing block, and the rocker is arranged on the end wall of the locking bolt and is perpendicular to the locking bolt.

Through adopting above-mentioned technical scheme, when locking first fixed block and second fixed block to the rocker is as rotating the medium, is rotatable locking bolt promptly through rotating the rocker promptly, convenient and fast.

In summary, the present application includes at least one of the following beneficial technical effects:

the hanging baskets are sleeved on the hooks in a one-to-one correspondence manner through the hanging rings, so that the hanging baskets are detachably connected with the insertion rods, lofting or sampling can be conveniently carried out, the insertion rods are conveniently driven to move along the vertical direction through the lifting device, and the temperatures of different positions in the heating cavity are tested through the temperature detection device, so that the test requirements are met;

according to the hanging basket, the connecting rod can be conveniently limited by the limiting rod which penetrates through the limiting groove in the connecting rod and is abutted against the groove wall of the limiting groove, so that the rotation condition of the lifting rod is favorably reduced, the stability of the hanging basket in the heating cavity is better, and meanwhile, in the process of lofting or sampling, after the lifting rod slides to the limiting groove, the lifting rod is rotated, so that the hanging basket is far away from one side of the heating cavity, the lofting or sampling operation can be carried out in a lower-temperature environment, and the protection of operators is favorably realized;

this application is through retaining member locking first fixed block and second fixed block for first fixed block and second fixed block all support the outer wall of tight lifter and parent tube, thereby fix the lifter conveniently, can take off under the lifter fixed state and hang the basket, and is more convenient.

Drawings

FIG. 1 is a schematic view showing a construction of a building material incombustibility test furnace according to example 1 of the present application.

Fig. 2 is an enlarged view at a in fig. 1.

FIG. 3 is a schematic view showing the structure of a building material incombustibility test furnace according to example 2 of the present application.

Fig. 4 is an enlarged view at B in fig. 3.

Description of reference numerals: 1. a furnace body; 11. a heating cavity; 2. a temperature detection device; 21. a first thermocouple; 22. a second thermocouple; 23. a third thermocouple; 3. a lifting device; 31. a base pipe; 32. a lifting rod; 33. a connecting rod; 331. a limiting groove; 34. a plastic handle; 4. inserting a rod; 41. a jack; 42. a through hole; 5. a hanger; 51. hooking; 52. a limiting ring; 6. hanging a basket; 61. hanging a ring; 7. a base; 8. a connecting rod; 81. a limiting hole; 9. a limiting device; 91. a limiting rod; 10. a fixing device; 101. a first fixed block; 102. a second fixed block; 103. a locking member; 104. an elastic block; 1031. locking the bolt; 1032. a rocker.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a building materials incombustibility test furnace.

Example 1:

referring to fig. 1 and 2, the building material incombustibility test furnace comprises a furnace body 1, a temperature detection device 2, a lifting device 3, an inserted link 4, a hanging rack 5 and a hanging basket 6, wherein the furnace body 1 is fixedly connected to a base 7, and a heating cavity 11 is formed in the top end wall of the furnace body 1 in the vertical direction. The inserting rod 4 is inserted into the heating cavity 11 along the vertical direction, and the hanging rack 5 is fixedly connected to one end, extending into the heating cavity 11, of the inserting rod 4. The hanger 5 comprises hooks 51, the hooks 51 are provided with at least two, the hooks 51 are provided with three in the embodiment, the three hooks 51 are fixedly connected to the outer peripheral wall of one end, extending into the heating cavity 11, of the insert rod 4, and the three hooks 51 are uniformly distributed on the outer peripheral wall of the insert rod 4 along the axis of the insert rod 4. The ends of the three hooks 51 far away from the inserted link 4 are all bent upwards, hanging rings 61 are fixedly connected to the top end wall of the hanging basket 6, and the hanging rings 61 are sleeved on the hooks 51 in a one-to-one correspondence manner. The lifting device 3 is used for driving the inserted link 4 to move along the vertical direction, and the temperature detection device 2 is used for detecting the temperatures of different positions in the heating cavity 11.

Referring to fig. 1 and 2, the lifting device 3 includes a base tube 31, a lifting rod 32 and a connecting rod 33, the base tube 31 is fixedly connected to a vertical side wall of the furnace body 1, an axis of the base tube 31 is vertical, the lifting rod 32 is slidably disposed on an inner wall of the base tube 31 in a vertical direction, and the lifting rod 32 is rotatably disposed on the inner wall of the base tube 31; a plastic handle 34 is fixedly connected to the top end wall of the lifting rod 32. The link 33 is fixedly connected to the outer peripheral wall of the lift lever 32, the axis of the link 33 is horizontal, the outer peripheral wall of the link 33 on the side close to the lift lever 32 is abutted against the top end wall of the base tube 31, and the insert rod 4 is fixedly connected to the link 33 and is parallel to the lift lever 32.

Referring to fig. 1 and 2, the temperature detecting device 2 includes a first thermocouple 21, a second thermocouple 22 and a third thermocouple 23, the first thermocouple 21 is fixedly connected to the furnace body 1 and extends into the heating cavity 11; the inserting rod 4 is provided with an inserting hole 41 in a penetrating manner along the vertical direction, a through hole 42 is arranged on the hole wall of the inserting hole 41 in a penetrating manner, and the second thermocouple 22 and the third thermocouple 23 both penetrate through the inserting hole 41; one end of the second thermocouple 22 penetrating through the jack 41 is located below the inserted link 4, the axis of the second thermocouple is vertical, one end of the third thermocouple 23 extending out of the through hole 42 is fixedly connected with the limiting ring 52, and the bottom end of the third thermocouple 23 is located below the limiting ring 52. The ends of the first thermocouple 21, the second thermocouple 22 and the third thermocouple 23 extending into the heating cavity 11 are spaced from the cavity wall of the heating cavity 11.

Referring to fig. 1 and 2, it is considered that the hanging ring 61 may slip on the hook 51, thereby causing poor stability of the hanging basket 6 in the heating chamber 11. Further, the hanger 5 further comprises a limiting ring 52, the limiting ring 52 is fixedly connected among the three hooks 51, the axis of the limiting ring is vertical, and one end of each hook 51, which is bent upwards, is located on one side of the limiting ring 52, which is far away from the inserted link 4. The hanging ring 61 is sleeved between the outer side wall of the end, bent upwards, of the hook 51 and the ring outer wall of the limiting ring 52.

When the building material incombustibility test is performed, a building material sample is placed in the hanging basket 6, then the hanging ring 61 on the hanging basket 6 is sleeved on the hook 51, then the furnace body 1 is heated to a corresponding temperature, and then the lifting rod 32 is rotated, so that the insertion rod 4 is opposite to the heating cavity 11. Then the lifting rod 32 slides downwards along the vertical direction until the connecting rod 33 abuts against the top end wall of the base pipe 31, and the inserted link 4 drives the hanging basket 6 to extend into the corresponding position of the heating cavity 11 for testing. The temperature of the corresponding location is tested by the first thermocouple 21, the second thermocouple 22 and the third thermocouple 23 during the experiment. After the test is finished, the lifting rod 32 slides upwards along the vertical direction until the hanging basket 6 extends out of the heating cavity 11, then the lifting rod 32 rotates, so that the hanging basket 6 deviates from one side of the heating cavity 11, then the hanging basket 6 is taken down, the residual building material samples are taken out, the mass weighing is carried out, and the test result recording is carried out.

Referring to fig. 1 and 2, a case where a position and a state of an end of the first thermocouple 21 protruding into the heating chamber 11 are stabilized is considered. Furthermore, a connecting rod 8 is fixedly connected to one side of the furnace body 1 opposite to the vertical side wall where the base pipe 31 is located, and the axis of the connecting rod 8 is horizontal and one end of the connecting rod is located above the heating cavity 11. One end that lies in heating chamber 11 top on connecting rod 8 runs through along vertical direction and is provided with spacing hole 81, and spacing hole 81 is relative along vertical direction with heating chamber 11, and first thermocouple 21 passes spacing hole 81 and stretches into heating chamber 11 in along vertical direction, the pore wall butt of first thermocouple 21 and spacing hole 81.

The first thermocouple 21 passes through the limiting hole 81 and then extends into the corresponding position of the heating cavity 11, so that the first thermocouple 21 can be stably located in the heating cavity 11 under the limiting effect of the wall of the limiting hole 81.

Referring to fig. 1 and 2, consider the situation where the insertion rod 4 needs to be retracted into the heating chamber 11 to reduce the rotation of the lifting rod 32 and thereby improve the stability of the hanging basket 6 within the heating chamber 11. Furthermore, a limiting device 9 is arranged on one side of the furnace body 1 opposite to the vertical side wall where the base pipe 31 is arranged. Stop device 9 includes gag lever post 91, and gag lever post 91 fixed connection is in furnace body 1 with the relative one side in the vertical lateral wall in parent tube 31 place, and spacing groove 331 has been seted up to the one end that parent tube 31 was kept away from to connecting rod 33, and the notch of spacing groove 331 runs through the end wall that connecting rod 33 kept away from one end of parent tube 31 along the horizontal direction, and the notch of spacing groove 331 runs through connecting rod 33 along vertical direction, and spacing groove 331 is the U-shaped groove promptly. The limiting rod 91 penetrates through the limiting groove 331 in the vertical direction and is abutted against the groove wall of the limiting groove 331.

When the insert rod 4 is inserted into the heating chamber 11, the holding link 33 is positioned above the stopper rod 91, and then the elevating lever 32 is rotated so that the stopper groove 331 is opposed to the stopper rod 91 in the vertical direction. Then, the lifting rod 32 slides downwards along the vertical direction, so that the limiting rod 91 penetrates through the limiting groove 331 along the vertical direction and is abutted against the groove wall of the limiting groove 331 to limit the connecting rod 33. Until the connecting rod 33 is abutted against the top end wall of the base pipe 31, the operation of extending the hanging basket 6 into the corresponding position of the heating cavity 11 through the inserted link 4 is completed.

The application embodiment 1 is an implementation principle of a building material incombustibility test furnace: hang basket 6 and establish between spacing ring 52 and the crooked one end of couple 51 through couple 51 cover for hang basket 6 can be located inserted bar 4 comparatively steadily, and realize dismantling between them and connect. When will hang basket 6 and stretch into heating chamber 11 through inserted bar 4, through rotating lifter 32, lifter 32 slides downwards again for gag lever post 91 inserts and establishes in spacing groove 331, until connecting rod 33 and parent tube 31's top end wall butt, the completion will hang basket 6 and arrange the operation of heating chamber 11 relevant position in, then test relevant operation again.

Example 2:

referring to fig. 3 and 4, the present embodiment is different from embodiment 1 in that a fixing device 10 for fixing a lifting rod 32 is provided on a base pipe 31. Fixing device 10 includes first fixed block 101, second fixed block 102 and retaining member 103, all is equipped with the concave arc end on first fixed block 101 and the second fixed block 102, and equal fixedly connected with elastic block 104 is served to the concave arc of first fixed block 101 and second fixed block 102, and elastic block 104 supports tightly with the periphery wall of base pipe 31 and lifter 32, and first fixed block 101 and second fixed block 102 set up about the axis symmetry of base pipe 31. The locking member 103 includes a locking bolt 1031 and a rocker 1032, the locking bolt 1031 is screwed between the first fixing block 101 and the second fixing block 102, the rocker 1032 is fixedly connected to one end of the locking bolt 1031 extending out of the first fixing block 101, and the rocker 1032 is perpendicular to the locking bolt 1031.

The application embodiment 2 is an implementation principle of a building material incombustibility test furnace: through the locking bolt 1031 threaded connection between first fixed block 101 and second fixed block 102, rotate locking bolt 1031, can lock first fixed block 101 and second fixed block 102 conveniently for the elastic block 104 on first fixed block 101 and the second fixed block 102 supports base pipe 31 and lifter 32 tightly relatively, thereby fixes lifter 32. After the lifting rod 32 is fixed, the cradle 6 is taken down or the cradle 6 is installed, so that the lifting device is more convenient and faster.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The non-combustibility test furnace for the building materials is characterized in that: comprises a furnace body (1), a temperature detection device (2), a lifting device (3), an insert rod (4), a hanging rack (5) and a hanging basket (6), wherein a heating cavity (11) is formed in the top end wall of the furnace body (1), the insert rod (4) is inserted into the heating cavity (11), the hanging rack (5) is arranged at one end, extending into the heating cavity (11), of the insert rod (4), the hanging rack (5) comprises hooks (51), at least two hooks (51) are arranged at least at two ends, extending into the heating cavity (11), of the insert rod (4), at least two ends, far away from the insert rod (4), of the hooks (51) are upwards bent, hanging rings (61) are arranged on the hanging basket (6), the hanging rings (61) are sleeved on the hooks (51) in a one-to-one correspondence manner, the lifting device (3) is used for driving the insert rod (4) to move along the vertical direction, the temperature detection device (2) is used for detecting the temperatures of different positions in the heating cavity (11).

2. The building material incombustibility test oven according to claim 1, wherein: the hanging rack (5) further comprises a limiting ring (52), the limiting ring (52) is arranged on the hook (51) and the axis of the limiting ring is vertical, one end of the hook (51) which bends upwards is located on one side, away from the inserted link (4), of the limiting ring (52), and the hanging ring (61) is sleeved between the outer side wall of one end of the hook (51) which bends upwards and the outer wall of the limiting ring (52).

3. The building material incombustibility test oven according to claim 1, wherein: elevating gear (3) include parent tube (31), lifter (32) and connecting rod (33), parent tube (31) set up on furnace body (1) and the axis is vertical, lifter (32) slide along vertical direction and set up on the inside pipe wall of parent tube (31), connecting rod (33) set up on the periphery wall of lifter (32) and the axis level of connecting rod (33), the top end wall butt of connecting rod (33) and parent tube (31), inserted bar (4) set up on connecting rod (33).

4. The building material incombustibility test oven according to claim 3, wherein: be provided with stop device (9) on furnace body (1), stop device (9) include gag lever post (91), the one end that parent tube (31) were kept away from in connecting rod (33) is provided with spacing groove (331), the notch of spacing groove (331) runs through the end wall that parent tube (31) one end was kept away from in connecting rod (33) along the horizontal direction, the notch of spacing groove (331) runs through connecting rod (33) along vertical direction, gag lever post (91) pass spacing groove (331) and with the cell wall butt of spacing groove (331) along vertical direction.

5. The building material incombustibility test oven according to claim 2, wherein: temperature-detecting device (2) include first thermocouple (21), second thermocouple (22) and third thermocouple (23), first thermocouple (21) set up on furnace body (1) and stretch into heating chamber (11), inserted bar (4) are provided with jack (41) along vertical direction run-through, jack (41) are all passed in second thermocouple (22) and third thermocouple (23), the one end that second thermocouple (22) passed jack (41) is located the below and the axis of inserted bar (4) vertical, it is provided with through-hole (42) to run-through on the pore wall of jack (41), third thermocouple (23) stretch out the one end of through-hole (42) and are connected with spacing ring (52), the bottom of third thermocouple (23) is located spacing ring (52) below.

6. The building material incombustibility test oven according to claim 5, wherein: be provided with connecting rod (8) on furnace body (1), it is provided with spacing hole (81) to run through along vertical direction on connecting rod (8), spacing hole (81) are relative with heating chamber (11), first thermocouple (21) pass spacing hole (81) and stretch into in heating chamber (11), the pore wall butt of first thermocouple (21) and spacing hole (81).

7. The building material incombustibility test oven according to claim 3, wherein: base tube (31) is provided with fixing device (10), fixing device (10) are including first fixed block (101), second fixed block (102) and retaining member (103), first fixed block (101) and second fixed block (102) all set up between base tube (31) and lifter (32), all be provided with elastic block (104) on first fixed block (101) and second fixed block (102), elastic block (104) are pasted tightly with the periphery wall of base tube (31) and lifter (32), retaining member (103) are located between first fixed block (101) and second fixed block (102) and are used for locking first fixed block (101) and second fixed block (102).

8. The building material incombustibility test furnace according to claim 7, wherein: the locking member (103) comprises a locking bolt (1031) and a rocker (1032), the locking bolt (1031) is in threaded connection between the first fixing block (101) and the second fixing block (102), and the rocker (1032) is arranged on the end wall of the locking bolt (1031) and is perpendicular to the locking bolt (1031).