Device for testing flame retardance of modified asphalt

Abstract

The invention discloses a device for testing the flame retardant property of modified asphalt, relates to the field of asphalt flame retardant property testing, and solves the problem that an existing device for testing the flame retardant property of the asphalt is difficult to fully heat an asphalt sample in all directions, the device comprises a device shell and a plurality of oxygen tanks, and the oxygen tanks are in butt joint with the device shell through air valves; an exhaust air bellow and an igniter are mounted at the top of the device shell, four telescopic rods are mounted on the inner wall of the bottom of the device shell, and a placement frame is mounted among the top ends of the four telescopic rods; the testing mechanism is used for carrying out a rotary flame-retardant test on the asphalt sample on the placing frame, and the testing mechanism is mounted on the inner side of the device shell; through the testing mechanism, the two sides of an asphalt sample on the placing frame can be clamped, so that the asphalt sample is in a rotating state, the igniter can conveniently and uniformly heat the asphalt sample, the surface of the asphalt sample is uniformly heated, the problem that a traditional testing device is difficult to uniformly heat is solved, and the flame retardant testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of asphalt flame retardant performance testing, in particular to a modified asphalt flame retardant performance testing device. Background Art

[0002] Modified asphalt is a road material that improves the performance of ordinary asphalt by adding polymers or other modifiers. It can enhance resistance to rutting and deformation, improve flexibility at low temperatures, and also has the characteristics of reducing cracking, delaying aging, extending service life, reducing water damage, improving durability, enhancing anti-fatigue performance, and increasing pavement life. It is widely used in various road projects with significant long-term benefits.

[0003] Asphalt is flammable and may bring fire risks. During reproduction, asphalt needs to be subjected to flame retardant tests to evaluate its combustion performance, ensure the safety of the material, and help understand the combustion characteristics of asphalt, thereby improving its formulation, enhancing its flame retardant properties, extending its service life and reducing fire hazards. When using existing asphalt flame retardant performance testing devices, the asphalt sample needs to be placed on a heating platform. The heating platform is usually a high-temperature resistant metal. When the flame heats the asphalt from top to bottom, the upper part of the asphalt is heated quickly, while the lower part is in contact with the metal platform at room temperature. The metal platform can absorb the temperature of the asphalt, resulting in uneven heating of the upper and lower parts of the asphalt. The asphalt sample cannot be fully heated in all directions, thereby extending the detection time. Summary of the invention

[0004] The purpose of the present invention is to provide a modified asphalt flame retardant performance testing device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A modified asphalt flame retardant performance testing device comprises: a device shell and a plurality of oxygen tanks equidistantly fixedly installed on the outside of the device shell, the oxygen tanks are connected to the device shell through an air valve, an exhaust bellows is fixedly installed on the top of the device shell, an igniter is fixedly installed on the top inner wall of the device shell, four telescopic rods symmetrically distributed in the center are fixedly installed on the bottom inner wall of the device shell, a placement rack is fixedly installed between the top ends of the four telescopic rods, and the top of the placement rack is an I-shaped structure; it also includes: a testing mechanism for performing a rotational flame retardant test on the asphalt sample on the placement rack, the testing mechanism is installed on the inner side of the device shell; a rack collection mechanism for automatically collecting the placement rack downwards, the rack collection mechanism is installed at the bottom of the placement rack; an exhaust mechanism for continuously purifying and exhausting the smoke in the device shell, the exhaust mechanism is installed on the top inner wall of the device shell.

[0006] Preferably, the testing mechanism comprises two first brackets symmetrically fixedly mounted on the bottom inner wall of the device housing, two symmetrically distributed second brackets are arranged between the two first brackets, the second bracket is fixedly mounted on the bottom inner wall of the device housing, an adjusting rod is rotatably mounted on the inner side of the device housing, the adjusting rod passes through the first bracket and the second bracket, two symmetrically distributed first moving blocks are arranged on the outer side of the adjusting rod, two symmetrically distributed first threads are provided on the outer side of the adjusting rod, a sleeve block matching the first thread is arranged on the inner side of the first moving block, a mounting frame is rotatably mounted on the outer side of the second bracket, and the mounting frame A push rod is slidably installed on the inner side of the mounting frame, and two symmetrically distributed card strips are provided on the inner side of the mounting frame, and a first slide groove is provided on the outer side of the push rod for limiting the sliding of the card strip. An inclined rod is slidably installed on both ends of the mounting frame, and a clamping plate is fixedly installed on the end of the inclined rod close to the push rod, and the end of the clamping plate close to the inclined rod is hingedly assembled with the push rod through the first connecting rod, and a push frame is rotatably installed on the outer side of the push rod, and the bottom of the push frame is fixedly installed on the outer side of the first moving block, and a plurality of first optical axes for limiting the sliding of the first moving block are fixedly installed between the first bracket and the second bracket, and a driving component for rotating the push rod is also provided on the outer side of the device shell.

[0007] Preferably, the rack collection mechanism includes two sliding bars symmetrically fixedly installed between the two second brackets, two symmetrically distributed slide plates are slidably installed between the two sliding bars, the slide plate is docked with the bottom of the placement rack through a second connecting rod, a convex ring is provided on the outer side of the sliding bar, and a tension spring is fixedly installed between the convex ring and the slide plate, two symmetrically distributed second moving blocks are arranged between the two slide plates, two symmetrically distributed second threads are provided on the outer side of the adjusting rod, and the two second threads are respectively matched with the two second moving blocks, a plurality of second optical axes for limiting sliding of the second moving blocks are fixedly installed between the two second brackets, a push block is fixedly installed on the top of the second moving block, and the push block and the slide plate are on the same horizontal line, a plurality of sliding frames symmetrically distributed in the center are slidably installed on the outer side of the sleeve block, a plurality of springs are fixedly installed between the inner side of the sliding frame and the inner side of the sleeve block, an insert block is fixedly installed on the side of the sliding frame away from the spring, a slot for limiting insertion of the insert block is provided on the inner side of the first moving block, the outer side of the insert block is a slope structure, and the length of the first thread is less than the length of the second thread.

[0008] Preferably, the exhaust mechanism comprises a mounting box fixedly mounted on the top inner wall of the device housing, a turntable is rotatably mounted on the inner side of the mounting box, eight filter screens symmetrically distributed in the center are fixedly mounted on the surface of the turntable, any one of the filter screens is aligned with the bottom of the exhaust bellows, a gear ring is fixedly mounted on the outer side of the turntable, a driven rod is rotatably mounted on the inner side of the mounting box, the bottom end of the driven rod extends to the bottom of the mounting box, a first bevel gear is rotatably mounted on the outer side of the first bracket near the left side of the device housing, a second bevel gear matched with the first bevel gear is rotatably mounted on the bottom end of the driven rod, a plurality of card blocks symmetrically distributed in the center are fixedly mounted on the inner side of the first bevel gear, a second slide groove for limiting the sliding of the card block is provided on the outer side of the push rod, a half gear is fixedly mounted on one end of the driven rod away from the second bevel gear, the half gear matches with the gear ring, an arc box is fixedly mounted on the bottom of the mounting box, and a plurality of scrapers equidistantly distributed are fixedly mounted on the top inner wall of the arc box.

[0009] Preferably, the driving assembly comprises two driving motors symmetrically fixedly mounted on the outer side of the device housing, and a prismatic rod is fixedly mounted on the output end of the driving motor, and the two prismatic rods are slidably mounted on the inner sides of the two push rods respectively.

[0010] Preferably, a plurality of pressure balls distributed at equal distances are fixedly mounted on one side corresponding to the two clamping plates.

[0011] Preferably, a shield is fixedly mounted on the bottom of the placement rack, and the shield is a hollow prism structure.

[0012] Preferably, the surfaces of the first bracket and the second bracket are provided with through holes for limiting the sliding of the push rod, a pull ring is fixedly installed on the inner side of the push bracket, and an annular groove matching with the pull ring is provided on the outer side of the push rod.

[0013] Preferably, an air intake duct is provided directly below the exhaust bellows, and the air intake duct is fixedly mounted on the bottom of the mounting box.

[0014] Preferably, the scraper has an inclined structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can clamp the two sides of the asphalt sample on the placement rack through the testing mechanism, so that the asphalt sample is in a rotating state, which is convenient for the igniter to heat the asphalt sample evenly and the surface of the asphalt sample is heated evenly, solving the problem that traditional testing devices are difficult to heat evenly, thereby improving the efficiency of flame retardant testing.

[0016] The present invention uses a rack retracting mechanism to maintain the position of the clamp after the clamp clamps the asphalt and move the placement rack downward to provide space for the rotation of the asphalt sample. It can also catch the liquid asphalt dripping after heating, and after the test is completed, the placement rack can automatically reset to facilitate catching the asphalt sample, thereby achieving the effect of placing and removing the asphalt sample.

[0017] The present invention uses an exhaust mechanism to enable the exhaust bellows to cooperate with the filter to process the smoke generated after the asphalt is ignited. A plurality of filters can be replaced in sequence through a turntable, and impurities at the bottom of the filter can be scraped off during the movement of the filter to solve the problem of filter blockage, thereby achieving the effect of continuously treating the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the adjustment rod and the installation box in the present invention; Figure 3 It is a schematic diagram of the mounting frame and the clamping plate structure in the present invention; Figure 4 It is a schematic diagram of the structure of the first moving block and the sleeve block in the present invention; Figure 5 It is a schematic diagram of the structure of the slide bar and the slide plate in the present invention; Figure 6 It is a schematic diagram of the structure of the push rod and the prismatic rod in the present invention; Figure 7 It is a schematic diagram of the arc box and scraper structure in the present invention; Figure 8 It is a schematic diagram of the structure of the turntable and the half gear in the present invention.

[0019] In the figure: 1, device housing; 2, oxygen tank; 3, exhaust bellows; 4, igniter; 5, telescopic rod; 6, placement rack; 7, first bracket; 8, second bracket; 9, adjustment rod; 10, first moving block; 11, mounting rack; 12, push rod; 13, clamping strip; 14, inclined rod; 15, clamping plate; 16, first connecting rod; 17, push rack; 18, sliding rod; 19, sliding plate; 20, second connecting rod; 21, tension spring; 22, second moving block ; 23. Push block; 24. Sleeve block; 25. Slide frame; 26. Spring; 27. Insert block; 28. Mounting box; 29. ​​Turntable; 30. Filter screen; 31. Gear ring; 32. Follower rod; 33. First bevel gear; 34. Second bevel gear; 35. Block; 36. Half gear; 37. Arc box; 38. Scraper; 39. Drive motor; 40. Prismatic rod; 41. Pressure ball; 42. Shield; 43. Pull ring; 44. Intake duct. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 8 The modified asphalt flame retardant performance testing device shown in the figure includes a device shell 1 and a plurality of oxygen tanks 2 equidistantly fixedly installed on the outside of the device shell 1, the oxygen tank 2 is connected to the device shell 1 through an air valve, and oxygen is injected into the device shell 1 through the oxygen tank 2 to facilitate ignition of the asphalt sample, an exhaust bellows 3 is fixedly installed on the top of the device shell 1, an igniter 4 is fixedly installed on the top inner wall of the device shell 1 for igniting the asphalt sample, four telescopic rods 5 symmetrically distributed in the center are fixedly installed on the bottom inner wall of the device shell 1, a placement rack 6 is fixedly installed between the top ends of the four telescopic rods 5, the top of the placement rack 6 is an I-shaped structure, which is convenient for placing the asphalt sample, and two symmetrically sealed sliding doors are installed on the outside of the device shell 1, and an observation mirror is provided on the sealed sliding door, so that the staff can open the sealed sliding door and place the asphalt sample on the placement rack 6; it also includes: a testing mechanism, which is used for rotating flame retardancy test of the asphalt sample on the placement rack 6, and the testing mechanism is installed on the inner side of the device shell 1.

[0022] The testing mechanism includes two first brackets 7 symmetrically fixedly installed on the bottom inner wall of the device housing 1, two symmetrically distributed second brackets 8 are arranged between the two first brackets 7, the second bracket 8 is fixedly installed on the bottom inner wall of the device housing 1, an adjusting rod 9 is rotatably installed on the inner side of the device housing 1, handles are installed at both ends of the adjusting rod 9, the adjusting rod 9 passes through the first bracket 7 and the second bracket 8, so that the first bracket 7 and the second bracket 8 provide support for the adjusting rod 9, two symmetrically distributed first moving blocks 10 are arranged on the outer side of the adjusting rod 9, two symmetrically distributed first threads are opened on the outer side of the adjusting rod 9, a sleeve block 24 matching the first thread is arranged on the inner side of the first moving block 10, and a mounting frame 11 is rotatably installed on the outer side of the second bracket 8, A push rod 12 is slidably installed on the inner side of the mounting frame 11, and two symmetrically distributed clamping strips 13 are provided on the inner side of the mounting frame 11. A first sliding groove for limiting the sliding of the clamping strip 13 is provided on the outer side of the push rod 12, so that the push rod 12 can move along the inner side of the mounting frame 11, and when the push rod 12 rotates, the mounting frame 11 can be driven to rotate through the first sliding groove and the clamping strip 13. Inclined rods 14 are slidably installed on both ends of the mounting frame 11, and a clamping plate 15 is fixedly installed on one end of the inclined rod 14 close to the push rod 12, and the outer side of the asphalt sample is clamped and fixed by the two clamping plates 15, and a plurality of equidistantly distributed pressure balls 41 are fixedly installed on the corresponding sides of the two clamping plates 15 to improve the stability of the clamping of the asphalt sample by the clamping plate 15, and the end of the clamping plate 15 close to the inclined rod 14 is fixedly installed with a clamping plate 15. The first connecting rod 16 is hingedly assembled with the push rod 12, so that when the push rod 12 moves, the two clamping plates 15 can be pulled to move by the two first connecting rods 16 respectively, and the clamping plates 15 drive the inclined rod 14 to move along the end of the mounting frame 11, so that the two clamping plates 15 can be close to each other to clamp and position the asphalt sample. A push frame 17 is rotatably installed on the outer side of the push rod 12, and the surfaces of the first bracket 7 and the second bracket 8 are provided with through holes for the push rod 12 to limit the sliding of the push rod 12. A pull ring 43 is fixedly installed on the inner side of the push frame 17, and an annular groove matching the pull ring 43 is provided on the outer side of the push rod 12, so that the push frame 17 can smoothly push the push rod 12 to move through the pull ring 43, and the bottom of the push frame 17 is fixedly installed on the outer side of the first moving block 10, so that when the first moving block 10 moves, The push frame 17 drives the push rod 12 to move. A plurality of first optical axes for limiting the sliding of the first moving block 10 are fixedly installed between the first bracket 7 and the second bracket 8, so that when the adjusting rod 9 is rotated, the first moving block 10 can be driven to move along the outer side of the first optical axis through the first thread and the sleeve block 24, and the moving directions of the two first moving blocks 10 are opposite. A driving component for rotating the push rod 12 is also provided on the outer side of the device housing 1. The driving component includes two driving motors 39 symmetrically fixedly installed on the outer side of the device housing 1. The output end of the driving motor 39 is fixedly installed with a prismatic rod 40. The two prismatic rods 40 are respectively slidably installed on the inner sides of the two push rods 12, so that the driving motor 39 can drive the push rod 12 to rotate through the prismatic rod 40, thereby realizing the rotation of the clamping plate 15.And the push rod 12 can move along the outer side of the prismatic rod 40.

[0023] Example 2: Please refer to Figure 2-Figure 6 , this embodiment further explains the first embodiment, the rack collection mechanism shown in the figure includes two sliding rods 18 symmetrically fixedly installed between the two second brackets 8, and two symmetrically distributed slide plates 19 are slidably installed between the two sliding rods 18. The slide plates 19 are connected to the bottom of the placement rack 6 through the second connecting rod 20, so that when the two slide plates 19 are away from each other, the placement rack 6 can be pulled downward by the second connecting rod 20, and the placement rack 6 can compress the four telescopic rods 5 to ensure the vertical movement of the placement rack 6. A convex ring is provided on the outer side of the sliding rod 18, and a tension spring 21 is fixedly installed between the convex ring and the slide plate 19, so that the slide plate 19 can stretch the tension spring 21 when it moves, and a tension spring 21 is provided between the two slide plates 19. There are two symmetrically distributed second moving blocks 22, and the outer side of the adjusting rod 9 is provided with two symmetrically distributed second threads, the second threads are opposite to the spiral direction of the first threads, and the two second threads are respectively matched with the two second moving blocks 22. A plurality of second optical axes for the second moving blocks 22 to limit the sliding are fixedly installed between the two second brackets 8. When the adjusting rod 9 rotates, the two second moving blocks 22 can be driven to move away from or close to each other through the two symmetrical second threads. A push block 23 is fixedly installed on the top of the second moving block 22. The push block 23 and the slide plate 19 are on the same horizontal line. When the push block 23 contacts the slide plate 19, the push block 23 can push the slide plate 19 to move, and the outer side of the sleeve block 24 A plurality of sliding frames 25 symmetrically distributed in the center are installed for side sliding, a plurality of springs 26 are fixedly installed between the inner side of the sliding frame 25 and the inner side of the sleeve block 24, an insert block 27 is fixedly installed on the side of the sliding frame 25 away from the spring 26, a slot for the insert block 27 to be inserted in a limited position is provided on the inner side of the first moving block 10, the outer side of the insert block 27 is a slope structure, the adjusting rod 9 can drive the sleeve block 24 to rotate through the first thread, and the spring 26 is used to make the spring 26 push the insert block 27 on the sliding frame 25 into the slot of the first moving block 10, and the sleeve block 24 can drive the first moving block 10 to rotate, and since the first moving block 10 is slidably installed on the outer side of the plurality of first optical axes, the first moving block 10 can move along the first The outer side of the optical axis moves, and the length of the first thread is smaller than the length of the second thread. When the first moving block 10 contacts the outer side of the second bracket 8, the second bracket 8 provides resistance for the first moving block 10, so that the slot of the first moving block 10 pushes the insert block 27 into the inner side of the sleeve block 24, and pushes the spring 26 in the slide frame 25 to contract, so that when the adjusting rod 9 rotates, it can continuously drive the sleeve block 24 to rotate, while the first moving block 10 remains relatively still, and the second thread can drive the second moving block 22 to continue to move, and make the push block 23 contact with the slide plate 19. A shield 42 is fixedly installed at the bottom of the placement frame 6, and the shield 42 has a hollow prism structure, which is convenient for catching the liquid asphalt dripping after the asphalt sample is ignited.

[0024] Example 3: Please refer to Figure 2 , Figure 7 and Figure 8 , this embodiment further explains other embodiments, the exhaust mechanism in the figure includes a mounting box 28 fixedly mounted on the top inner wall of the device housing 1, a turntable 29 is rotatably mounted on the inner side of the mounting box 28, and eight filter screens 30 are fixedly mounted on the surface of the turntable 29 and are symmetrically distributed in the center, and any one of the filter screens 30 is aligned with the bottom of the exhaust bellows 3, and an air intake duct 44 is arranged directly below the exhaust bellows 3, and the air intake duct 44 is fixedly mounted on the bottom of the mounting box 28, so that the smoke in the device housing 1 is discharged from the air intake duct 44 enters the exhaust bellows 3, and in the process of moving, the smoke is filtered by the filter 30, so that the impurities in the smoke are retained at the bottom of the filter 30, the outer side of the rotating disk 29 is fixedly installed with a gear ring 31, the inner side of the mounting box 28 is rotatably installed with a driven rod 32, the bottom end of the driven rod 32 extends to the bottom of the mounting box 28, the outer side of the first bracket 7 near the left side of the device housing 1 is rotatably installed with a first bevel gear 33, and the bottom end of the driven rod 32 is rotatably installed with a second bevel gear 33 that matches the first bevel gear 33. The bevel gear 34 and the first bevel gear 33 are fixedly mounted with a plurality of blocks 35 symmetrically distributed on the inner side thereof. A second slide groove for limiting the sliding of the blocks 35 is provided on the outer side of the push rod 12. When the push rod 12 rotates, the first bevel gear 33 can be driven by the blocks 35, and the first bevel gear 33 can drive the driven rod 32 to rotate through the second bevel gear 34. A half gear 36 is fixedly mounted on the end of the driven rod 32 away from the second bevel gear 34. The half gear 36 cooperates with the gear ring 31. When the half gear 36 rotates, When the turntable 29 rotates one circle, the gear ring 31 can drive the turntable 29 to rotate one eighth of a circle, and the positions of the eight filter screens 30 on the turntable 29 can be replaced in sequence. An arc box 37 is fixedly installed at the bottom of the installation box 28, and a plurality of scrapers 38 with equal distances are fixedly installed on the top inner wall of the arc box 37. The scrapers 38 are inclined. When the turntable 29 rotates, the filter screen 30 can move along the top of the scraper 38, so that the scraper 38 scrapes out the impurities on the filter screen 30 to prevent the filter screen 30 from being blocked, thereby ensuring normal filtering of the flue gas.

[0025] Working principle: First, the staff puts the asphalt sample on the placement rack 6, closes the two sealed sliding doors on the device housing 1, and injects oxygen into the device housing 1 through the oxygen tank 2. Then, the staff rotates the adjusting rod 9 so that the adjusting rod 9 can drive the corresponding two sleeve blocks 24 to rotate through the two first threads. By utilizing the elasticity of the spring 26, the spring 26 pushes the insert block 27 on the slide frame 25 to press against the slot of the first moving block 10, so that the sleeve block 24 drives the first moving block 10 to rotate. Under the limitation of the first optical axis, as the adjusting rod 9 rotates, the first moving block 10 moves along the outer side of the first optical axis toward the direction of the second bracket 8. At this time, the first moving block 10 drives the push rod 12 to move through the push frame 17, so that the push rod 12 is pulled respectively through the two first connecting rods 16. The two clamping plates 15 are moved, and the clamping plates 15 drive the inclined rod 14 to move along the end of the mounting frame 11, so that the clamping plates 15 are in an inclined moving state. At the same time, the adjusting rod 9 drives the two second moving blocks 22 to move away from each other through two symmetrical second threads. When the first moving block 10 contacts the outer side of the second bracket 8, the second bracket 8 provides resistance for the first moving block 10, so that the slot of the first moving block 10 pushes the insert block 27 into the inner side of the sleeve block 24, and pushes the spring 26 in the slide frame 25 to contract. The adjusting rod 9 can continuously drive the sleeve block 24 to rotate, while the first moving block 10 remains relatively still. At this time, the four clamping plates 15 contact the outer side of the asphalt sample to clamp and position the asphalt sample. Then, the push block 23 on the second moving block 22 is connected to the slide plate 19. The push block 23 pushes the slide plate 19 to move along the outside of the slide rod 18 and stretches the tension spring 21. The two slide plates 19 pull the placement rack 6 downward through the second connecting rod 20, so that the placement rack 6 compresses the four telescopic rods 5, and the placement rack 6 can move downward smoothly and away from the asphalt sample. Finally, the staff starts the igniter 4, the exhaust bellows 3 and the driving motor 39. The driving motor 39 drives the prismatic rod 40 to rotate, so that the prismatic rod 40 drives the push rod 12 to rotate, and the push rod 12 drives the mounting frame 11 to rotate through the card strip 13, so that the mounting frame 11 drives the splint 15 to rotate through the inclined rod 14, and the splint 15 can drive the asphalt sample to rotate, so that the igniter 4 heats the asphalt sample evenly, so that the asphalt sample is evenly heated, and the smoke generated by the asphalt sample enters the inlet The impurities in the smoke are filtered through the filter screen 30 and then discharged outwardly from the exhaust bellows 3 to achieve the filtration and purification of the smoke. At the same time, the push rod 12 drives the first bevel gear 33 to rotate through the block 35, so that the first bevel gear 33 drives the driven rod 32 to rotate through the second bevel gear 34, and the driven rod 32 drives the half gear 36 to rotate. When the teeth on the half gear 36 contact the gear ring 31, the gear ring 31 can be driven to rotate one eighth of a circle, so that the gear ring 31 drives the turntable 29 to rotate synchronously, and with the rotation of the half gear 36, the eight filter screens 30 on the turntable 29 are replaced in turn, and in the process of the rotation of the turntable 29, the filter screen 30 contacts the scraper 38 in the arc box 37, so that the scraper 38 scrapes off the impurities at the bottom of the filter screen 30.Achieve continuous purification of flue gas, thereby improving the flame retardant test efficiency of asphalt samples and improving the convenience of asphalt sample placement.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modified asphalt flame retardant performance testing device, characterized in that: include: The device shell is connected to a plurality of oxygen tanks, and the oxygen tanks are connected to the device shell through gas valves. An exhaust bellows and an igniter are installed on the top of the device shell. Four telescopic rods are installed on the bottom inner wall of the device shell, and a placement rack is installed between the top ends of the four telescopic rods. Also includes: A test mechanism, used for performing a rotational flame retardancy test on an asphalt sample on a placement rack, the test mechanism being installed on the inner side of a device housing, the test mechanism comprising two first brackets installed on the inner wall of the bottom of the device housing, two second brackets being arranged between the two first brackets, a mounting frame being rotatably mounted on the outer side of the second bracket, a push rod being slidably mounted on the inner side of the mounting frame, two clamping strips being arranged on the inner side of the mounting frame, a first sliding groove for limiting sliding of the clamping strip being arranged on the outer side of the push rod, inclined rods being slidably mounted on both ends of the mounting frame, a clamping plate being mounted on one end of the inclined rod, and one end of the clamping plate being hingedly assembled with the push rod through a first connecting rod; The rack-collecting mechanism is used to automatically collect the placement rack downwards, and the rack-collecting mechanism is installed at the bottom of the placement rack; The exhaust mechanism is used to continuously purify and discharge the smoke in the device shell, and the exhaust mechanism is installed on the top inner wall of the device shell.

2. The flame retardant performance testing device for modified asphalt according to claim 1, characterized in that: The testing mechanism also includes an adjusting rod rotatably installed on the inner side of the device housing, two first moving blocks are arranged on the outer side of the adjusting rod, two symmetrically distributed first threads are opened on the outer side of the adjusting rod, a sleeve block matching the first threads is arranged on the inner side of the first moving block, a pushing bracket is arranged between the pushing rod and the first moving block, a plurality of first optical axes for limiting the sliding of the first moving block are installed between the first bracket and the second bracket, and a driving component for rotating the pushing rod is also arranged on the outer side of the device housing.

3. A modified asphalt flame retardant performance testing device according to claim 2, characterized in that: The rack-collecting mechanism includes two sliding bars installed between the two second brackets, two slide plates slidably installed between the two sliding bars, the slide plate is docked with the bottom of the placement rack through the second connecting rod, a convex ring is provided on the outer side of the sliding bar, and a tension spring is installed between the convex ring and the slide plate, two second moving blocks are arranged between the two slide plates, two symmetrically distributed second threads are provided on the outer side of the adjusting rod, the two second threads are respectively matched with the two second moving blocks, a plurality of second optical axes for limiting the sliding of the second moving blocks are installed between the two second brackets, a push block is installed on the top of the second moving block, a plurality of sliding frames are slidably installed on the outer side of the sleeve block, a plurality of springs are installed between the inner side of the sliding frame and the inner side of the sleeve block, an insert block is installed on one side of the sliding frame, a slot for limiting the insertion of the insert block is provided on the inner side of the first moving block, the outer side of the insert block is a slope structure, and the length of the first thread is less than the length of the second thread.

4. The modified asphalt flame retardant performance testing device according to claim 3, characterized in that: The exhaust mechanism includes an installation box installed on the top inner wall of the device shell, a turntable is rotatably installed on the inner side of the installation box, eight filter screens are installed on the surface of the turntable and are symmetrically distributed in the center, any one of the filter screens is aligned with the bottom of the exhaust bellows, a gear ring is installed on the outer side of the turntable, a driven rod is rotatably installed on the inner side of the installation box, the bottom end of the driven rod extends to the bottom of the installation box, a first bevel gear is rotatably installed on the outer side of the first bracket near the left side of the device shell, a second bevel gear is rotatably installed on the bottom end of the driven rod, a plurality of blocks are installed on the inner side of the first bevel gear, a second slide groove for limiting the sliding of the block is opened on the outer side of the push rod, a half gear is installed on one end of the driven rod, an arc box is installed at the bottom of the installation box, and a plurality of scrapers are installed on the top inner wall of the arc box.

5. The flame retardant performance testing device for modified asphalt according to claim 2, characterized in that: The driving assembly comprises two driving motors installed on the outside of the device housing, and the output ends of the driving motors are installed with prismatic rods, and the two prismatic rods are respectively slidably installed on the inner sides of the two push rods.

6. The modified asphalt flame retardant performance testing device according to claim 2, characterized in that: A plurality of pressure balls are installed on the corresponding sides of the two clamping plates.

7. The flame retardant performance testing device for modified asphalt according to claim 2, characterized in that: A shield is installed at the bottom of the placement rack, and the shield is a hollow prism structure.

8. The flame retardant performance testing device for modified asphalt according to claim 2, characterized in that: The surfaces of the first bracket and the second bracket are provided with through holes for limiting sliding of the push rod, a pull ring is installed on the inner side of the push bracket, and an annular groove matched with the pull ring is provided on the outer side of the push rod.

9. The flame retardant performance testing device for modified asphalt according to claim 4, characterized in that: An air intake duct is arranged directly below the exhaust bellows, and the air intake duct is installed at the bottom of the installation box.

10. The flame retardant performance testing device for modified asphalt according to claim 4, characterized in that: The scraper is in an inclined structure.

Images