A bitumen rotary thin film oven

Abstract

The utility model is suitable for bitumen performance detection equipment technical field discloses bitumen rotary film oven, including thermostat, electric control box, vertical carousel assembly, drive mechanism, support and receiving tray. The utility model discloses a support is set up with the thermostat left and right two side wall surface connection in the thermostat, and the receiving tray below vertical carousel assembly is placed on the support, when the bitumen softening point is lower than the test temperature in the thermostat, makes the bitumen easy to flow from the sample bottle, can collect the bitumen sample that flows from the sample bottle through the receiving tray, avoids that bitumen sample is contaminated the bottom wall of thermostat, will not increase the unnecessary cleaning operation of thermostat.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt performance testing equipment, and in particular to an asphalt rotary film drying oven. Background Technology

[0002] The asphalt rotating film oven can simulate the aging behavior of hot-mix asphalt mixtures. It can measure the mass loss of road petroleum asphalt films after heating and evaluate the aging resistance of asphalt by measuring changes in properties such as penetration, ductility, viscosity and brittleness of the heated asphalt residues.

[0003] Existing rotating film ovens for asphalt, such as the temperature-controlled rotating film oven for asphalt disclosed in Chinese patent document CN204165977U, typically include a constant temperature chamber with a vertically positioned turntable installed inside. During the test, a glass narrow-necked sample bottle containing an asphalt sample is placed on the turntable, and the turntable drives the sample bottle to make a circular motion, so that the sample is heated evenly during the rotation.

[0004] However, during the test, the temperature inside the constant temperature chamber needs to be set at around 160℃. Different asphalt materials have different softening points. When the softening point of the asphalt is lower than the test temperature inside the constant temperature chamber, the fluidity of the asphalt increases, and it is easy for it to flow out from the sample bottle to the bottom of the constant temperature chamber. This not only affects the hot air circulation inside the constant temperature chamber, but also increases the unnecessary cleaning operations of the constant temperature chamber.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] The present invention provides an asphalt rotary film drying oven, which aims to solve the problem that when the softening point of asphalt is lower than the test temperature inside the constant temperature chamber, the fluidity of the asphalt increases, and it is easy for it to flow out from the sample bottle to the bottom of the constant temperature chamber. This not only affects the hot air circulation inside the constant temperature chamber, but also increases the unnecessary cleaning operations of the constant temperature chamber.

[0007] To achieve the above objectives, the solution provided by this utility model is as follows:

[0008] A rotary asphalt film drying oven includes a constant temperature chamber, an electrical control box located next to the constant temperature chamber, a vertical turntable assembly located inside the constant temperature chamber, and a drive mechanism for driving the vertical turntable assembly to rotate; it also includes:

[0009] A support frame, which is connected to the left and right side walls of the constant temperature chamber;

[0010] A receiving tray is placed on a support and is located below the vertical turntable assembly.

[0011] Optionally, the asphalt rotary film drying oven further includes a squirrel-cage fan and a heating assembly; the bottom wall of the constant temperature chamber is provided with a first air duct, and the bottom wall of the constant temperature chamber is provided with an air inlet, which is connected to the first air duct; the left and right walls of the constant temperature chamber are each provided with a second air duct, which is connected to the first air duct; the top wall of the constant temperature chamber is provided with a third air duct, which is connected to the second air duct; the heating assembly is located in the third air duct; the squirrel-cage fan is connected to the top wall of the constant temperature chamber, and the air inlet of the squirrel-cage fan is connected to the third air duct.

[0012] Optionally, the asphalt rotary film drying oven further includes an air duct and an air compressor; the air compressor is located inside the electrical control box; the air duct is fixed above the bottom wall of the constant temperature chamber and is connected to the air compressor; the air duct has an air outlet facing the vertical turntable assembly.

[0013] Optionally, the air duct includes a first air duct section and a second air duct section; the first air duct section is coiled and connected to the air compressor; the second air duct section is inverted L-shaped and threadedly connected to the first air duct section, and the second air duct section is located on the front side of the receiving tray.

[0014] Optionally, the vertical turntable assembly includes:

[0015] The first rotating rod is rotatably connected to the rear wall of the constant temperature chamber, and is also drively connected to the output shaft of the drive mechanism;

[0016] The first turntable is connected to the end of the first rotating rod;

[0017] The second turntable is arranged parallel to the first turntable, and both the second turntable and the first turntable are provided with receiving holes;

[0018] A limiting block is provided between the first turntable and the second turntable, and the limiting block cooperates with the receiving hole to limit the position of the sample bottle;

[0019] A transmission assembly is mounted on the second turntable and is used to drive the limiting block.

[0020] Optionally, the transmission assembly includes:

[0021] A transmission screw is arranged radially along the second turntable, and the transmission screw is rotatably located on the side of the second turntable facing the first turntable, and the transmission screw passes through the limiting block and is threadedly connected to the limiting block.

[0022] The first bevel gear is fixedly mounted on the end of the transmission screw facing the center of the second turntable;

[0023] The second rotating rod rotates and passes through the center of the second turntable;

[0024] The second bevel gear is fixedly mounted at the end of the second rotating rod, and the second bevel gear meshes with the first bevel gear.

[0025] Optionally, the second turntable is provided with a guide groove parallel to the transmission lead screw, and the limiting block is connected to a movable part that is slidably connected to the guide groove.

[0026] Optionally, a knob is provided at the end of the second rotating rod away from the first turntable.

[0027] Beneficial effects:

[0028] This utility model provides an asphalt rotary film drying oven. By setting up a support connected to the left and right side walls of the constant temperature oven, and placing a receiving tray below the vertical turntable assembly on the support, when the softening point of the asphalt is lower than the test temperature inside the constant temperature oven, making it easy for the asphalt to flow out of the sample bottle, the receiving tray can collect the asphalt sample flowing out of the sample bottle, avoiding the asphalt sample from sticking to the bottom wall of the constant temperature oven and avoiding unnecessary cleaning operations of the constant temperature oven. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the asphalt rotary film drying oven provided by this utility model. Figure 1 .

[0031] Figure 2 yes Figure 1 Enlarged view of section A.

[0032] Figure 3 This is a schematic diagram of the structure of the asphalt rotary film drying oven provided by this utility model. Figure 2 .

[0033] Figure 4 This is a structural schematic diagram of the vertical turntable assembly.

[0034] Figure 5 This is a schematic diagram of the structure of the first turntable.

[0035] Explanation of icon numbers:

[0036] 1-Insulated chamber; 101-First air duct; 102-Second air duct; 103-Third air duct; 104-Air inlet;

[0037] 2-Electrical control box;

[0038] 3-Vertical turntable assembly; 31-First rotating rod; 32-First turntable; 33-Second turntable; 331-Guide groove; 3a-Receiving hole; 34-Limiting block; 341-Moving part; 35-Transmission assembly; 351-Transmission screw; 352-First bevel gear; 353-Second rotating rod; 354-Second bevel gear; 355-Knob;

[0039] 4-Support; 5-Feeding tray; 6-Rat cage fan; 7-Heating component;

[0040] 8-Air duct; 81-First air duct section; 82-Second air duct section;

[0041] 9-Thermocouple; 10-Ventilation pipe. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0045] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0046] Please see Figures 1 to 5 This utility model provides an asphalt rotating film drying oven, including a constant temperature box 1, an electrical control box 2, a vertical turntable assembly 3, a drive mechanism, a support 4, and a receiving tray 5.

[0047] Specifically, the electrical control box 2 is located next to the constant temperature chamber 1. The vertical turntable assembly 3 is installed inside the constant temperature chamber 1 and close to the rear wall of the constant temperature chamber 1. The driving mechanism can be a drive motor, which can be located inside the rear wall of the constant temperature chamber 1, and its output shaft is connected to the vertical turntable assembly 3 for transmission, thereby driving the vertical turntable assembly 3 to rotate in the vertical direction.

[0048] Specifically, the bracket 4 is connected to the left and right side walls of the constant temperature chamber 1. The connection method can be welding or threaded connection using screws or the like. The receiving tray 5 is placed on the bracket 4 and located below the vertical turntable assembly 3, so that it can be used for asphalt samples flowing out of the sample bottle, avoiding asphalt samples from contaminating the bottom wall of the constant temperature chamber 1 and reducing unnecessary cleaning operations for the constant temperature chamber 1.

[0049] like Figure 3 As shown, optionally, the asphalt rotating film drying oven further includes a squirrel cage fan 6 and a heating component 7; the bottom wall of the constant temperature chamber 1 is provided with a first air duct 101, and the bottom wall of the constant temperature chamber 1 is provided with an air inlet 104 communicating with the first air duct 101; the left and right walls of the constant temperature chamber 1 are both provided with a second air duct 102 communicating with the first air duct 101; and the top wall of the constant temperature chamber 1 is provided with a third air duct 103 communicating with the second air duct 102.

[0050] To achieve hot air circulation inside the constant temperature chamber 1, the cage fan 6 is connected to the top wall of the constant temperature chamber 1 and is driven by a motor located at the top of the constant temperature chamber 1. The air inlet of the cage fan 6 is connected to the third air duct 103. The heating component 7 (which can be an electric heating element) can be installed inside the third air duct 103 and located on both sides of the cage fan 6. When the cage fan 6 is working, it blows the hot air from the top of the constant temperature chamber 1 downwards towards the bottom wall of the constant temperature chamber 1. The bottom wall of the constant temperature chamber 1 has an air inlet 104, allowing the hot air to enter the first air duct 101. After entering the first air duct 101, the hot air flows sequentially through the second air duct 102 and the third air duct 103, and then flows back through the cage fan 6, forming a hot air circulation. Moreover, the heating component 7 can heat the hot air flowing back into the constant temperature chamber 1, thereby maintaining the temperature inside the constant temperature chamber 1.

[0051] In addition, the top of the constant temperature chamber 1 is provided with a ventilation pipe 10, which is connected to the inside of the constant temperature chamber 1, so that excess gas inside the constant temperature chamber 1 is discharged to the outside of the constant temperature chamber 1 through the ventilation pipe 10.

[0052] like Figures 1 to 3 As shown, optionally, the asphalt rotary film drying oven further includes an air duct 8 and an air compressor (not shown in the attached diagram); the air compressor is located inside the electrical control box 2; the air duct 8 is fixed above the bottom wall of the constant temperature chamber 1 and is connected to the air compressor; the air duct 8 has an air outlet facing the vertical turntable assembly 3. The air compressor can provide the air required for the test. After the air enters the air duct 8, it can be preheated within the air duct 8 because the air duct 8 can exchange heat with the hot air inside the constant temperature chamber 1. When the air is sprayed from the air duct 8 onto the test bottle, it ensures that the asphalt in the sample bottle is in full contact with fresh hot air during the heating process, simulating the oxidation environment of asphalt in actual use.

[0053] like Figures 1 to 3 As shown, optionally, the air duct 8 includes a first air duct section 81 and a second air duct section 82; the first air duct section 81 is coiled and connected to the air compressor. By designing the first air duct 8 as a coil, the path of fresh air flowing within the air duct 8 can be extended, allowing the fresh air to be fully preheated.

[0054] The second air guide duct section 82 is inverted L-shaped and can be threadedly connected to the first air guide duct section 81 via an annular pipe connector with internal threads. The second air guide duct section 82 is located in front of the receiving tray 5. Since the second air guide duct section 82 is threadedly connected to the first air guide duct section 81, the second air guide duct section 82 can be disassembled. When it is necessary to remove the receiving tray 5 from the horizontal temperature chamber, the second air guide duct 82 will not obstruct the removal of the receiving tray 5 from the constant temperature chamber 1.

[0055] like Figure 4 and Figure 5 As shown, optionally, the vertical turntable assembly 3 includes a first rotating rod 31, a first turntable 32, a second turntable 33, a limiting block 34, and a transmission assembly 35.

[0056] Specifically, the first rotating rod 31 is rotatably connected to the rear wall of the constant temperature chamber 1, and is also drively connected to the output shaft of the drive mechanism. This allows the drive mechanism to rotate the first rotating rod 31, thereby causing the vertical turntable assembly 3 to rotate. The first turntable 32 is connected to the end of the first rotating rod 31. The second turntable 33 is arranged parallel to the first turntable 32, and is connected to the first turntable 32 via multiple connecting rods. Both the second turntable 33 and the first turntable 32 are provided with receiving holes 3a for accommodating sample vials.

[0057] Specifically, the limiting block 34 is located between the first turntable 32 and the second turntable 33, and the limiting block 34 has an arc surface that mates with the outer wall of the sample bottle. Through the engagement of the limiting block 34 with the receiving hole 3a, the sample bottle can be limited, preventing it from moving freely after being inserted into the receiving hole 3a. The transmission assembly 35 is located on the second turntable 33 and is used to drive the limiting block 34, so that after the sample bottle is inserted into the receiving hole 3a, the limiting block 34 can abut against the bottle wall, thereby engaging with the wall of the receiving hole 3a to jointly limit the sample bottle.

[0058] like Figure 4 and Figure 5 As shown, optionally, the transmission assembly 35 includes a transmission screw 351, a first bevel gear 352, a second rotating rod 353, and a second bevel gear 354.

[0059] Specifically, the transmission screw 351 is arranged radially along the second turntable 33, and the transmission screw 351 can be rotatably mounted on the side of the second turntable 33 facing the first turntable 32 via a support shaft seat (not shown in the attached drawings). The transmission screw 351 passes through the limiting block 34 and is threadedly connected to the limiting block 34. It can be understood that the number of transmission screws 351 is the same as the number of receiving holes on the first turntable 32 and the second turntable 33.

[0060] Specifically, the first bevel gear 352 is fixedly mounted on the end of the transmission screw 351 facing the center of the second turntable 33; the second rotating rod 353 rotates and passes through the center of the second turntable 33; the second bevel gear 354 is fixedly mounted on the end of the second rotating rod 353, and the second bevel gear 354 meshes with the first bevel gear 352. By rotating the second rotating rod 353, the second bevel gear 354 can be driven to rotate. Since the second bevel gear 354 meshes with the first bevel gear 352, when the second bevel gear 354 rotates, it can transmit power to the first bevel gear 352 and the transmission screw 351 thereon, thereby allowing the limiting block 34 to move along the transmission screw 351, so that the limiting block 34 can move closer to or further away from the sample bottle.

[0061] It is understandable that when multiple transmission screws 351 are arranged radially along the second turntable 33, multiple first bevel gears 352 can simultaneously mesh with the second bevel gear 354. Thus, when the second rotating rod 353 rotates, it can simultaneously drive multiple transmission screws 351.

[0062] like Figure 4 and Figure 5 As shown, optionally, to prevent the limiting block 34 from rotating with the transmission screw 351, a guide groove 331 parallel to the transmission screw 351 is provided on the second turntable 33. The limiting block 34 is connected to a movable part 341 that is slidably connected to the guide groove 331. Furthermore, since the guide groove 331 faces the test personnel when it is located on the second turntable 33, the test personnel can determine whether the limiting block 34 is in contact with the sample bottle wall based on the positional change of the movable part 341 within the guide groove 331.

[0063] like Figure 4 As shown, optionally, a knob 355 is provided at the end of the second rotating rod 353 away from the first turntable 32, so that the test personnel can rotate the second rotating rod 353.

[0064] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotating asphalt film drying oven, comprising a constant temperature chamber (1), an electrical control box (2) disposed beside the constant temperature chamber (1), a vertical turntable assembly (3) disposed inside the constant temperature chamber (1), and a drive mechanism for driving the vertical turntable assembly to rotate; characterized in that, Also includes: Support (4), which is connected to the left and right side walls of the constant temperature chamber (1); The receiving tray (5) is placed on the bracket (4) and is located below the vertical turntable assembly (3).

2. The asphalt rotary film drying oven according to claim 1, characterized in that, It also includes a cage fan (6) and a heating assembly (7); the bottom wall of the constant temperature chamber (1) is provided with a first air duct (101), and the bottom wall of the constant temperature chamber (1) is provided with an air inlet (104), which is connected to the first air duct (101); the left and right walls of the constant temperature chamber (1) are provided with a second air duct (102), which is connected to the first air duct (101); the top wall of the constant temperature chamber (1) is provided with a third air duct (103); the third air duct (103) is connected to the second air duct (102); the heating assembly (7) is located in the third air duct (103); the cage fan (6) is connected to the top wall of the constant temperature chamber (1), and the air inlet of the cage fan (6) is connected to the third air duct (103).

3. The asphalt rotary film drying oven according to claim 2, characterized in that, It also includes a duct (8) and an air compressor; the air compressor is located inside the electrical control box (2); the duct (8) is fixed above the bottom wall of the constant temperature box (1) and is connected to the air compressor; the duct (8) has an air outlet facing the vertical turntable assembly (3).

4. The asphalt rotary film drying oven according to claim 3, characterized in that, The air duct (8) includes a first air duct section (81) and a second air duct section (82); the first air duct section (81) is coiled and connected to the air compressor; the second air duct section (82) is inverted L-shaped and threadedly connected to the first air duct section (81), and the second air duct section (82) is located in front of the receiving tray (5).

5. The asphalt rotary film drying oven according to claim 1, characterized in that, The vertical turntable assembly (3) includes: The first rotating rod (31) is rotatably connected to the rear wall of the constant temperature chamber (1), and the first rotating rod (31) is drive-connected to the output shaft of the drive mechanism; The first turntable (32) is connected to the end of the first rotating rod (31); The second turntable (33) is arranged in parallel with the first turntable (32), and both the second turntable (33) and the first turntable (32) are provided with receiving holes (3a). The limiting block (34) is located between the first turntable (32) and the second turntable (33), and the limiting block (34) cooperates with the receiving hole (3a) to limit the position of the sample bottle; The transmission assembly (35) is located on the second turntable (33) and is used to drive the limit block (34).

6. The asphalt rotary film drying oven according to claim 5, characterized in that, The transmission assembly (35) includes: The transmission screw (351) is arranged radially along the second turntable (33), and the transmission screw (351) is rotatably located on the side of the second turntable (33) facing the first turntable (32), and the transmission screw (351) passes through the limiting block (34) and is threadedly connected to the limiting block (34). The first bevel gear (352) is fixedly mounted on one end of the transmission screw (351) facing the center of the second turntable (33); The second rotating rod (353) rotates and passes through the center of the second turntable (33); The second bevel gear (354) is fixedly disposed at the end of the second rotating rod (353), and the second bevel gear (354) meshes with the first bevel gear (352).

7. The asphalt rotary film drying oven according to claim 6, characterized in that, The second turntable (33) is provided with a guide groove (331) parallel to the transmission screw (351), and the limiting block (34) is connected to a movable part (341) that is slidably connected to the guide groove (331).

8. The asphalt rotary film drying oven according to claim 6, characterized in that, The second rotating rod (353) has a knob (355) at the end away from the first turntable (32).

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