Fluorite combustion testing device

Abstract

The utility model discloses a fluorite combustion testing device which comprises a tubular furnace body, two fixing blocks are arranged on the outer side wall of the tubular furnace body, the free ends of the fixing blocks are inclined planes, and containing grooves are formed in the top ends of the fixing blocks. The furnace tube supporting mechanism comprises a base, a supporting rod arranged on the base, a fixing plate arranged on the supporting rod, two positioning blocks and two positioning plates which are arranged on the fixing plate, springs arranged on the positioning plates, a horizontal rod jointly connected with the two springs, and a furnace tube clamping assembly arranged at the top end of the supporting rod. A sliding hole is horizontally formed in the positioning block, a through hole is formed in the top end of the positioning hole, and a sliding rod is arranged in the through hole. By arranging the fixing block, the sliding hole, the sliding rod and the horizontal rod, the supporting mechanism can be connected with the tubular furnace body, the supporting mechanism is fixed, the supporting stability of the furnace tube is improved, and the supporting mechanism and the tubular furnace body can be rapidly disassembled and assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection equipment technical field, more specifically, the utility model relates to a fluorite combustion testing device. BACKGROUND

[0002] As an important industrial raw material, the content of sulfur element in fluorite will significantly affect the product quality and subsequent processing technology, and the accurate determination of the content of sulfur element in fluorite and its combustion characteristics is very important. For example, in steel smelting, if the fluorite used has too high sulfur content, it will increase the brittleness of steel products and reduce their mechanical properties and corrosion resistance. The prior art generally uses a tubular furnace for combustion testing, but the existing tubular furnace needs to replace the furnace tube when it is damaged. In order to facilitate the replacement of the furnace tube, a support device is needed to support the furnace tube. The application number CN202211502391.8 discloses a tubular furnace quartz tube dismounting device and method. The dismounting device is separately arranged from the tubular furnace. This arrangement causes the dismounting device to deviate from the tubular furnace during use, which causes the furnace tube to deviate and affects the stability of the furnace tube. SUMMARY

[0003] The utility model has an object to provide a fluorite combustion testing device, which is connected with the tubular furnace body through the fixed block, sliding hole, sliding rod and horizontal rod, and can fix the support mechanism, improve the stability of the furnace tube support, and quickly dismount and install the support mechanism and the tubular furnace body.

[0004] In order to achieve the purposes and other advantages of the utility model, a fluorite combustion testing device is provided, which comprises:

[0005] A tubular furnace body is provided with two fixed blocks with inclined free ends on the outer side wall, and the top end of the fixed block is provided with a receiving groove;

[0006] A furnace tube support mechanism comprises a base, a support rod arranged on the base, a fixed plate arranged on the support rod, two positioning blocks and two positioning plates arranged on the fixed plate, a spring arranged on the positioning plate, a horizontal rod connected with the two springs, and a furnace tube clamping assembly arranged at the top end of the support rod. The positioning block is horizontally provided with a sliding hole to accommodate the fixed block. The top end of the positioning block is provided with a through hole, and the through hole is in communication with the sliding hole. The through hole is provided with a sliding rod with an inclined end face which can slide up and down. The top end of the two sliding rods is connected with the horizontal rod. When the two fixed blocks are located in the two sliding holes respectively, the end of the sliding rod is located in the receiving groove.

[0007] Preferably, the fixed plate can slide up and down relative to the support rod, the base is provided with two first support rods, the end of the first support rod is provided with a rotatable threaded cap, the threaded cap is provided with a second support rod with a thread matched therewith to adjust the distance between the first support rod and the second support rod by rotating the threaded cap, and the end of the second support rod is connected with the fixed plate.

[0008] Preferably, the fixed plate is provided with a limiting rod, and two positioning blocks can slide relative to the limiting rod.

[0009] The fixed plate is provided with a rotatable threaded rod with a bidirectional thread, the positioning block is provided with a threaded hole, the threaded rod passes through two threaded holes to adjust the distance between the two positioning blocks by rotating the threaded rod.

[0010] Preferably, the clamping assembly comprises a plurality of support plates connected in sequence, the support plate is provided with two clamping plates that can move relative to or away from each other, the support plate at the end is connected with the support rod, both sides of the support plate are provided with blind holes, the connecting rod is slidably arranged in the blind hole, and the connecting rod is connected with the adjacent support plate.

[0011] Preferably, a plurality of ball bearings are arranged at the middle position of the support plate and the inner side of the clamping plate.

[0012] Preferably, the support rod is provided with a first telescopic motor, and the end of the first telescopic motor is connected with the support plate at the end to drive the plurality of support plates to move in the horizontal direction.

[0013] Preferably, the base is provided with a first sliding plate, and one side of the first sliding plate is provided with a second sliding plate that can slide relative thereto.

[0014] The support plate is provided with a vertical rod, and the bottom end of the vertical rod is provided with a linear wheel, wherein the plurality of vertical rods close to the support rod are located above the first sliding plate and the linear wheel is in contact with the first sliding plate, the vertical rod on the support plate at the end is fixedly connected with the second sliding plate, and the remaining plurality of vertical rods are located above the second sliding plate and in contact with the linear wheel and the second sliding plate.

[0015] The first telescopic motor is connected with the end of the second sliding plate to drive the second sliding plate to move relative to the first sliding plate and support the vertical rod.

[0016] Preferably, the support plate at the end is provided with a second telescopic motor, the end of the output shaft of the second telescopic motor is provided with a vertical plate, and the top plate that moves up and down relative to the vertical plate is arranged on the vertical plate to clamp furnace pipes with different diameters.

[0017] Preferably, the base is liftable.

[0018] Preferably, the furnace tube of the tube furnace body is a corundum tube.

[0019] The utility model at least has following beneficial effects:

[0020] Firstly, the utility model has the fixed block, the sliding hole, the sliding rod, the horizontal rod, can connect the support mechanism with the tube furnace body, realize the fixation of the support mechanism, improve the stability of the furnace tube support, and can also realize the quick dismounting and installation of the support mechanism with the tube furnace body; through setting the accommodating groove and the spring, the bottom end of the sliding rod is accommodated, and the fixation of the fixed block is realized, and the horizontal rod can drive two sliding rods to move upward at the same time, and the installation or dismounting efficiency is improved.

[0021] Secondly, the utility model adjusts the distance between the first support rod and the second support rod through the rotating screw cap, and realizes the height of the fixed plate, which makes the support mechanism adapt to fixed blocks of different heights, improves the universality and applicability of the support mechanism; the utility model adjusts the distance between the two positioning blocks through the threaded rod, and realizes the applicability of fixed blocks of different distances, and improves the applicability of the support mechanism.

[0022] Thirdly, the utility model has the support plate which can move relatively, can support the furnace tube of different lengths, and can also support the middle part of the furnace tube, improves the stability of the furnace tube support; the position of the clamping plate is adjusted through the second screw rod transmission mechanism, which is simple and direct, and does not need complex tools and professional skills, and the operator can quickly adjust the spacing of the clamping plate according to the thickness of the furnace tube, improves the efficiency of experiment preparation, and the sliding connection mode of the connecting rod also makes the overall adjustment of the clamping assembly more convenient.

[0023] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. DRAWINGS

[0024] Figure 1 The structure diagram of the fluorite combustion test device is shown in one of the technical schemes of the utility model;

[0025] Figure 2 The utility model discloses a fluorite combustion test device Figure 1 The enlarged view of A;

[0026] Figure 3 The structure diagram of the positioning block is shown in one of the technical schemes of the utility model;

[0027] Figure 4The structure schematic view of the support mechanism of any one of the technical solutions of the utility model.

[0028] Figure 5 The structure schematic view of the first sliding plate of any one of the technical solutions of the utility model. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0030] As Figures 1-5 The utility model provides a fluorite combustion testing arrangement, including:

[0031] The outer side wall of tubular furnace body 13 is equipped with two fixed blocks 24 with free end inclined surface, and the top of fixed block 24 is equipped with accommodating groove 26;

[0032] The furnace tube support mechanism includes base 1, support rod 2 arranged on base 1, fixed plate 15 arranged on support rod 2, two positioning blocks 20 and two positioning plates 16 arranged on fixed plate 15, spring 17 arranged on positioning plate 16, horizontal rod 18 connected with two springs 17, and furnace tube clamping assembly arranged on the top of support rod 2, the horizontal sliding hole 25 is arranged on the positioning block 20 to accommodate the fixed block 24, the top of positioning block is equipped with through hole, the through hole is communicated with the sliding hole 25, the through hole is equipped with the end surface inclined sliding rod 19 that can slide up and down, the top of two sliding rods 19 is connected with the horizontal rod 18, when two fixed blocks 24 are located in two sliding holes 25 respectively, the end of sliding rod 19 is located in the accommodating groove 26.

[0033] In the technical scheme, the tubular furnace body 13 adopts the prior art, the sample is placed into the furnace tube of the tubular furnace body 13 for combustion test; the fixing blocks 24 are arranged on both sides of the furnace tube of the tubular furnace body 13; the base 1 has good stability and corrosion resistance, is of a rectangular structure, and can provide support for the furnace tube during installation or disassembly of the furnace tube; the support rod 2 is vertically installed on the base 1 and connected to the base 1 by welding, and the horizontal section of the support rod 2 is rectangular; the fixed plate 15 is arranged in parallel with the side wall of the tubular furnace body 13 where the fixing blocks 24 are located; two positioning blocks 20 are arranged on the fixed plate 15 at intervals, the positioning blocks 20 are provided with sliding holes 25 in the horizontal direction, the sliding holes 25 face the fixing blocks 24, the size of the sliding holes 25 matches the size of the fixing blocks 24 on the tubular furnace body 13, the vertical section of the fixing block 24 is rectangular, the horizontal section of the through hole is rectangular, the through hole is smaller than the sliding hole 25, the positioning plate 16 is horizontally arranged and located above the positioning blocks 20; the clamping assembly is used for clamping the furnace tube, one end of the spring 17 is fixed to the positioning plate 16, the other end is connected to the horizontal rod 18, and the spring 17 can stretch and contract in the vertical direction; the bottom end of the sliding rod 19 is beveled and matches the bevel of the fixing block 24, when the two fixing blocks 24 are located in the two sliding holes 25 respectively, the sliding rod 19 slides downward under the action of the pulling force of the spring 17, and the bottom end of the sliding rod 19 can accurately fall into the accommodating groove 26, so that the tubular furnace body 13 and the furnace tube support mechanism are tightly connected and fixed; when it is necessary to separate the fixing block 24 from the sliding hole 25, the horizontal rod 18 is moved upward to drive the sliding rod 19 to move upward, so that the bottom end of the sliding rod 19 is separated from the accommodating groove 26, and after separation, the bottom end of the sliding rod 19 is located in the sliding hole 25.

[0034] During use, when the furnace tube needs to be replaced, the base 1 is moved to the tubular furnace, the two fixing blocks 24 are correspondingly arranged in the two sliding holes 25, the sliding rod 19 moves upward to the through hole under the push of the bevel of the fixing block 24, when the accommodating groove 26 is located below the through hole, the bottom end of the sliding rod 19 enters the accommodating groove 26 under the elastic force of the spring 17, at this time, the fixing block 24 is fixed, the furnace tube part is taken out and fixed under the clamping assembly, the furnace tube is fixed under the action of the clamping assembly, the furnace tube can be separated from the tubular furnace body 13 by manually pulling the furnace tube, then the end of the new furnace tube is clamped on the clamping assembly to support the furnace tube, then the furnace tube can be pushed into the tubular furnace body 13 by manually pushing the furnace tube, after the new furnace tube is replaced, the horizontal rod 18 is pulled upward to separate the bottom end of the sliding rod 19 from the accommodating groove 26, and then the base 1 is moved to separate the fixing block 24 from the sliding hole 25, and the disassembly of the support mechanism is completed.

[0035] The utility model discloses a fixing block 24, sliding hole 25, sliding rod 19, horizontal rod 18 are set up, can not only make support mechanism with tubular furnace body 13 connect, realize the fixation of support mechanism, improve the stability of the support of furnace tube, but also can make support mechanism with tubular furnace body 13 realize quick dismounting and installation with, through setting up accommodating groove 26, spring 17, realize the bottom end of accommodating sliding rod 19, further realize the fixation of fixing block 24, can realize the driving of two sliding rods 19 upward simultaneously through setting up horizontal rod 18, improve the efficiency of installation or dismounting.

[0036] In another technical scheme, the fixing plate 15 can slide up and down relative to the support rod 2 (one of the implementation manners can be that a first sliding rail 31 is arranged on the support rod 2, a first sliding block that can slide up and down is arranged on the first sliding rail 31, and the fixing plate 15 is connected with the first sliding block to realize that the fixing plate 15 can slide up and down relative to the support rod 2), two first supporting rods 29 are vertically arranged on the base 1 (the first supporting rods 29 are welded on the surface of the base 1), a rotatable threaded cap 27 is arranged at the end of the first supporting rod 29 (one of the implementation manners of the rotatable threaded cap 27 can be that a ring-shaped second sliding rail is coaxially arranged on the upper part of the first supporting rod 29, two second sliding blocks are arranged on the second sliding rail, and the inner wall of the lower part of the threaded cap 27 is connected with the second sliding blocks to realize that the first supporting rod 29 is rotationally connected with the threaded cap 27), a second supporting rod 28 that is matched with the threaded cap 27 and has a thread is arranged in the threaded cap 27 (the second supporting rod 28 has a thread) to adjust the distance between the first supporting rod 29 and the second supporting rod 28 by rotating the threaded cap 27, and the end of the second supporting rod 28 is connected with the fixing plate 15 to adjust the height of the fixing plate 15. According to the utility model, the distance between the first supporting rod 29 and the second supporting rod 28 is adjusted by rotating the threaded cap 27, and then the height of the fixing plate 15 is adjusted, so that the support mechanism can adapt to fixing blocks 24 of different heights, and the universality and applicability of the support mechanism are improved.

[0037] In another technical scheme, the fixing plate 15 is provided with a limiting rod 30, the limiting rod 30 is horizontally arranged, the two positioning blocks 20 can slide relative to the limiting rod 30 (in the extension direction of the limiting rod 30, the positioning block 20 is provided with a smooth through hole, and the diameter of the through hole is greater than the diameter of the limiting rod 30), the limiting rod 30 is made of stainless steel with a smooth surface, the fixing plate 15 is provided with two fourth baffles 21, and the two ends of the limiting plate are fixedly connected with the two fourth baffles 21.

[0038] The fixed plate 15 is provided with a rotatable threaded rod 23 with bidirectional threads, the threaded rod 23 is horizontally arranged, the positioning block 20 is provided with threaded holes (the central axis of the threaded hole is horizontally arranged), the threaded rod 23 passes through the two threaded holes to adjust the distance between the two positioning blocks 20 by rotating the threaded rod 23, the fixed plate 15 is provided with two first baffles 22, the threaded rod 23 is rotatably connected with the baffle, one end of the threaded rod 23 passes through the first baffle 22 to facilitate the operator to rotate the threaded rod 23. By adopting the technical scheme, the distance between the two positioning blocks 20 is adjusted by arranging the threaded rod 23, so that the fixed block 24 applicable to different distances is realized, and the applicability of the supporting mechanism is improved.

[0039] In another technical scheme, the clamping assembly comprises a plurality of sequentially connected support plates 6 (the support plate 6 is horizontally arranged), the support plate 6 is provided with two clamping plates 7 which can move relative to or away from each other (the two clamping plates 7 on the same support plate 6 are arranged in parallel, the support plate 6 is provided with two second baffles 8, the two clamping plates 7 are located between the two second baffles 8, the second baffle 8 is provided with a second rotating hole with threads, the clamping plate 7 is provided with a rotatable second screw rod 9 with threads, the two second screw rods 9 pass through the two second rotating holes one by one to adjust the distance between the two clamping plates 7 by rotating the second screw rod 9), the support plate 6 located at (close to the end of the support rod 2) the end is connected with the support rod 2, the two sides of the support plate 6 are provided with blind holes (the blind hole is horizontally arranged), the connecting rod 10 is slidably arranged in the blind hole, the connecting rod 10 is connected with the adjacent support plate 6 (the blind hole is not arranged on the support plate 6 away from the support rod 2, and the connecting rod 10 is not arranged on the support plate 6 close to the support rod 2), in the use process, the distance between the two clamping plates 7 is adjusted based on the diameter of the furnace tube to be replaced, the moving distance of the support plate 6 is adjusted according to the length of the furnace tube, and the fixed is placed on the clamping assembly. The furnace tube can be moved to the position where the furnace tube is located in the tubular furnace body 13 by driving the support plate 6 to move to the position where the adjacent two support plates 6 are in contact by manpower. By adopting the technical scheme, the support plate 6 which can move relative to each other is arranged, not only the supporting mechanism can be applicable to the furnace tube with different lengths, but also the middle part of the furnace tube can be supported, and the stability of the support of the furnace tube is improved; the position of the clamping plate 7 is adjusted by the second screw rod 9 transmission mechanism, which is simple and direct, and does not need complex tools and professional skills. The operator can quickly adjust the spacing of the clamping plate 7 according to the thickness of the furnace tube, improve the efficiency of the experiment preparation, and the sliding connection mode of the connecting rod 10 also makes the overall adjustment of the clamping assembly more convenient.

[0040] In another technical scheme, the middle positions of the support plates 6 and the inner sides of the clamping plates 7 are spaced apart and provided with a plurality of rolling balls 32 (the rolling balls 32 are embedded in the support plates 6 and the clamping plates 7 through precisely processed circular grooves, and the rolling balls 32 can flexibly roll in the grooves), and the furnace pipes are clamped between the rolling balls 32. By adopting the technical scheme, the rolling balls 32 are arranged, so that the furnace pipes can slide relative to the clamping plates 7 and the support plates 6, and the movement of the furnace pipes is more facilitated.

[0041] In another technical scheme, the support rod 2 is provided with a first telescopic motor 4, the first telescopic motor 4 is fixed on the support rod 2 through a customized L-shaped mounting bracket, the output shaft of the first telescopic motor 4 telescopes in the horizontal direction, and the end of the first telescopic motor 4 (the end away from the end of the support rod 2) is connected with the support plate 6 to drive the plurality of support plates 6 to move in the horizontal direction. By adopting the technical scheme, the first telescopic motor 4 is arranged, so that the support plate 6 is driven to move in the horizontal direction.

[0042] In another technical scheme, the base 1 is horizontally provided with a first sliding plate 14 (the base 1 is provided with a plurality of stand columns 3, and the first sliding plate 14 is connected with the top ends of the plurality of stand columns 3), the first sliding plate 14 is located above the first telescopic motor 4, one side of the first sliding plate 14 is provided with a horizontally arranged second sliding plate 5 which can slide relative to the first sliding plate 14 (the first sliding plate 14 is provided with a third sliding rail, a third sliding block is slidably arranged on the third sliding rail, and the third sliding block is connected with the second sliding plate 5);

[0043] The support plate 6 is provided with a vertical rod 11 (the vertical rod 11 is arranged below the support plate 6), the bottom end of the vertical rod 11 is provided with a straight wheel 12, the plurality of vertical rods 11 close to the support rod 2 are located above the first sliding plate 14 and the straight wheels 12 are in contact with the first sliding plate 14, the vertical rod 11 on the support plate 6 at the end is fixedly connected with the second sliding plate 5, and the remaining plurality of vertical rods 11 are located above the second sliding plate 5 and are in contact with the straight wheels 12 and the second sliding plate 5 (for example, the number of support plates 6 is six, the support plate 6 close to the support rod 2 is arranged on the support rod 2, the vertical rod 11 is not arranged, the straight wheels 12 of the two support plates 6 close to the support plate 6 are in contact with the first sliding plate 14, the vertical rod 11 of the support plate 6 at the end of the remaining three support plates 6 is connected with the second sliding plate 5, and the straight wheels 12 of the other two support plates 6 are in contact with the second sliding plate 5);

[0044] The first telescopic motor 4 is connected with the end of the second sliding plate 5 to drive the second sliding plate 5 to move relative to the first sliding plate 14 and support the vertical rod 11. By adopting the technical scheme, the first sliding plate 14, the second sliding plate 5, the vertical rod 11 and the linear wheel 12 are arranged to support the support plate 6, so that the stability of the support of the furnace tube is improved, and the second sliding plate 5 can move in the horizontal direction relative to the first sliding plate 14, thereby reducing the size of the support mechanism when being stored.

[0045] In another technical scheme, the support plate 6 at the end (away from the support rod 2) is provided with a second telescopic motor, the end of the output shaft of the second telescopic motor is provided with a vertical plate 33 (the output shaft of the second telescopic motor is telescopic in the horizontal direction), the vertical plate 33 is provided with a top plate 34 moving up and down relative to the vertical plate 33 to clamp the furnace tube with different diameters (the vertical plate 33 is provided with a third baffle 35, the third baffle 35 is provided with a third rotating hole with threads, the top plate 34 is rotatably provided with a third screw rod 36 with threads, the third screw rod 36 passes through the third rotating hole to adjust the position of the top plate 34, and the width of the top plate 34 and the vertical plate 33 is smaller than the minimum distance between the two clamping plates 7), in the use process, when the furnace tube needs to be taken out, the output shaft of the second telescopic motor is contracted to the shortest, and when a new furnace tube needs to be installed, the position of the support plate 6 is adjusted according to the length of the furnace tube by driving the first telescopic motor 4, then the furnace tube is placed between the clamping plates 7, the clamping plates 7 are fixed by the top plate 34, then the first telescopic motor 4 is started, the first telescopic motor 4 drives the support plate 6 to move to the position where the support plate 6 cannot move any more, then the second telescopic motor is started, and the output shaft of the second telescopic motor is elongated to continue to drive the furnace tube to move to the position where the furnace tube is located in the tubular furnace body 13. By adopting the technical scheme, the second telescopic motor is arranged to drive the movement of the furnace tube, and the top plate 34 is arranged to fix the furnace tube, so that the furnace tube is always in a horizontal state during the installation process.

[0046] In another technical scheme, the base 1 is liftable, and the lifting mode can be that the base 1 comprises a first bottom plate and a second bottom plate, the support rod 2 and the first rod body are arranged on the second bottom plate, a plurality of electric push rods are arranged on the first bottom plate, and the upper ends of the electric push rods are connected with the second bottom plate. By adopting the technical scheme, the height of the support plate 6 can be adjusted, so that the support plate 6 can be applied to tubular furnace bodies 13 with different heights.

[0047] In another technical scheme, the furnace tube of the tubular furnace body 13 is a corundum tube. By adopting the technical scheme, the corrosion of the furnace tube during the test process can be reduced, and the service life of the furnace tube is prolonged.

[0048] The number of devices and the scale of processing described herein are used to simplify the description of the present application. The application, modification and variation of the fluorite combustion testing device of the present application are obvious to those skilled in the art.

[0049] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and the embodiments listed in the specification, and it can be fully applied to various fields suitable for the present application, and other modifications can be easily implemented by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A fluorite combustion testing device, characterized in that, include: The tubular furnace body has two fixed blocks with inclined free ends on its outer side wall, and the top of the fixed blocks has a receiving groove. A furnace tube support mechanism includes a base, a support rod on the base, a fixing plate on the support rod, two positioning blocks and two positioning plates on the fixing plate, springs on the positioning plates, a horizontal rod connected to the two springs, and a furnace tube clamping assembly at the top of the support rod. The positioning blocks have horizontal sliding holes to accommodate the fixing blocks. The top of the positioning blocks has through holes communicating with the sliding holes. The through holes contain sliding rods with inclined end faces that can slide up and down. The tops of both sliding rods are connected to the horizontal rod. When the two fixing blocks are respectively located in the two sliding holes, the ends of the sliding rods are located in the receiving grooves.

2. The fluorite combustion testing apparatus as described in claim 1, characterized in that, The fixing plate can slide up and down relative to the support rod. The base is provided with two first support rods. The end of the first support rod is provided with a rotatable threaded cap. The threaded cap is provided with a threaded second support rod that is adapted to it so that the distance between the first support rod and the second support rod can be adjusted by rotating the threaded cap. The end of the second support rod is connected to the fixing plate.

3. The fluorite combustion testing device as described in claim 1, characterized in that, The fixed plate is provided with a limiting rod, and the two positioning blocks can slide relative to the limiting rod; The fixed plate is provided with a rotatable threaded rod with bidirectional threads, and the positioning block is provided with threaded holes. The threaded rod passes through two threaded holes to adjust the distance between the two positioning blocks by rotating the threaded rod.

4. The fluorite combustion testing device as described in claim 1, characterized in that, The clamping assembly includes multiple support plates connected in sequence. Each support plate has two clamping plates that can move relative to or away from each other. The support plate at the end is connected to the support rod. Both sides of the support plate are provided with blind holes. A connecting rod is slidably arranged in the blind holes. The connecting rod is connected to its adjacent support plate.

5. The fluorite combustion testing apparatus as described in claim 4, characterized in that, Multiple ball bearings are spaced apart at the middle position of the support plate and on the inner side of the clamping plate.

6. The fluorite combustion testing apparatus as described in claim 4, characterized in that, The support rod is equipped with a first telescopic motor, the end of which is connected to the end support plate to drive multiple support plates to move horizontally.

7. The fluorite combustion testing apparatus as described in claim 6, characterized in that, The base is provided with a first sliding plate, and a second sliding plate that can slide relative to the first sliding plate is provided on one side of the first sliding plate; The support plate is provided with a vertical rod, and the bottom end of the vertical rod is provided with a linear wheel. Among them, a plurality of vertical rods near the support rod are located above the first slide plate and the linear wheel is in contact with the first slide plate. The vertical rod on the support plate at the end is fixedly connected to the second slide plate. The remaining plurality of vertical rods are located above the second slide plate and are in contact with the linear wheel and the second slide plate. The first telescopic motor is connected to the end of the second slide plate to drive the second slide plate to move relative to the first slide plate and to support the vertical rod.

8. The fluorite combustion testing apparatus as described in claim 7, characterized in that, A second telescopic motor is provided on the support plate located at the end. The output shaft of the second telescopic motor is provided at the end of a vertical plate. A top plate that moves up and down relative to the vertical plate is provided on the vertical plate to clamp furnace tubes of different diameters.

9. The fluorite combustion testing apparatus as described in claim 1, characterized in that, The base is adjustable in height.

10. The fluorite combustion testing apparatus as described in claim 1, characterized in that, The furnace tubes of the tubular furnace body are made of corundum.

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