Asphalt low-temperature ductility testing device

Abstract

The utility model provides an asphalt low-temperature ductility testing device which comprises a testing frame and a hooking mold, a low-temperature asphalt sample is embedded and installed on the inner side of the hooking mold, limiting sliding rails are fixedly installed on the two sides of the interior of the testing frame, hooking sliding plates are movably installed in the middles of the limiting sliding rails, and the hooking sliding plates are movably installed in the middle of the testing frame. Limiting sliding rods are fixedly installed on the two sides of the hooking sliding plate. When the servo motor is started, the transmission shaft drives the rotating disc to synchronously rotate, so that the traction rope is gradually withdrawn along with rotation, and then dynamic traction pulling force is applied to the low-temperature asphalt sample so as to carry out dynamic active pull rope ductility test on the low-temperature asphalt sample; static gravity ductility test is carried out on a low-temperature asphalt sample through the counter weight, and the asphalt ductility test is prevented from being influenced by sagging of the asphalt in an arc-shaped bending state through vertical dynamic and static asphalt ductility tests.

Description

TECHNICAL FIELD

[0001] The utility model relates to bitumen ductility test equipment field, and specifically is a bitumen low temperature ductility testing device. BACKGROUND

[0002] In the use process of bitumen, especially in the field of road construction, various external forces need to be borne, and in low temperature environment, bitumen will become hard and brittle, and cracks are easy to produce, ductility test can simulate the situation of bitumen when it is stretched, and the ductility value obtained by testing can directly reflect the flexibility of bitumen, and the bitumen low temperature ductility testing device is used for testing the ductility performance of bitumen under low temperature condition, the ductility refers to the degree of deformation of material under stress, and the ductility performance of bitumen has important influence on the durability and crack resistance of road, and through testing the low temperature ductility of bitumen, the deformation performance of bitumen under low temperature can be evaluated, which provides reference basis for the selection of road material and engineering design.

[0003] The "low temperature bitumen extension tester" described in the patent application number "CN202321583437.3", in the technical scheme, two distance measuring components arranged in the base are used to detect the data when the current bitumen breaks, and the controller arranged at the front end of the base is used for rapid display operation, so as to achieve the purpose of accurate measurement.

[0004] In the process of bitumen transverse tensile ductility test, because the bitumen material itself has certain ductility, when it is stretched, under the action of gravity, the bitumen will spread from the center to both sides and gradually sag, and this sagging phenomenon will cause the adhesion between the bitumen and the testing device, and then affect the ductility test of bitumen.

[0005] Therefore, we provide a bitumen low temperature ductility testing device. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a bitumen low temperature ductility testing device, which can effectively solve the problem that when the bitumen is stretched, under the action of gravity, the bitumen will spread from the center to both sides and gradually sag, and this sagging phenomenon will cause the adhesion between the bitumen and the testing device, and then affect the ductility test of bitumen, in addition, the bending form will further reduce the accuracy of bitumen ductility test data.

[0007] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0008] The utility model provides an asphalt low temperature ductility testing device, including test frame and hook mould, the inside of hook mould is inlayed and is installed with low temperature asphalt sample, both sides of the inside of test frame are fixedly installed with limit slide rail, and the middle of limit slide rail is movably installed with hook slide plate, both sides of hook slide plate are fixedly installed with limit slide rod, and limit slide rod is inlayed and is movably installed in the inside of limit slide rail, one side of test frame is fixedly installed with servo motor for providing power, the inside one end of test frame is inlayed and is movably installed with transmission shaft, and transmission shaft is transmission connection with the drive shaft on servo motor, the middle of transmission shaft is fixedly installed with rotary disc, and the inside of rotary disc is wound with traction rope, the inside other end of test frame is fixedly connected with connecting rod, and the below of connecting rod is fixedly installed with hooking plate for hooking hook mould.

[0009] In the above-mentioned scheme, preferably, one side of the test frame is inlayed with a connecting shaft, and the lower side of the test frame is fixedly installed with a supporting station foot.

[0010] In the above-mentioned scheme, preferably, both sides of the test frame are provided with sealing plates, and the sealing plate on one side is fixedly connected with the test frame, and the sealing plate on the other side is movably connected with the test frame through a connecting shaft, and one side of the sealing plate on the other side is fixedly installed with a handle.

[0011] In the above-mentioned scheme, preferably, one side of the hooking plate is fixedly installed with a hook, and both ends of the hook mould and both ends of the hook slide plate are fixedly installed with hooks.

[0012] In the above-mentioned scheme, preferably, the inside of the limit slide rail is provided with an elastic rope above, and both ends of the elastic rope are fixedly connected with the test frame and the limit slide rod respectively.

[0013] In the above-mentioned scheme, preferably, the lower side of the hook slide plate is provided with a weight disc, and the weight disc is detachably connected with the hook slide plate through a hook, the weight disc is inlayed and placed with a counterweight, one side of the transmission shaft is provided with a nesting block, and the nesting block is fixedly connected with the test frame.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The asphalt low-temperature ductility testing device, through the installation of the sealing plate, the traction rope and the hooking sliding plate and other devices, when the servo motor is started, the transmission shaft drives the rotating disc to rotate synchronously, the traction rope is gradually retracted along with the rotation, and then a dynamic traction tension is applied to the low-temperature asphalt sample, so that the low-temperature asphalt sample is subjected to the dynamic active rope ductility test; when the hooking sliding plate moves along the limiting sliding rail under the gravity of the counterweight, the low-temperature asphalt sample is subjected to the static gravity ductility test through the counterweight, and the vertical dynamic and static asphalt ductility test is carried out, so that the low-temperature asphalt sample is prevented from being vertically hung in an arc-shaped bending state and affecting the ductility test of the asphalt.

[0016] The asphalt low-temperature ductility testing device, through the installation of the sealing plate, the traction rope and the hooking sliding plate and other devices, when the servo motor is started, the transmission shaft drives the rotating disc to rotate synchronously, the traction rope is gradually retracted along with the rotation, and then a dynamic traction tension is applied to the low-temperature asphalt sample, so that the low-temperature asphalt sample is subjected to the dynamic active rope ductility test; when the hooking sliding plate moves along the limiting sliding rail under the gravity of the counterweight, the low-temperature asphalt sample is subjected to the static gravity ductility test through the counterweight, and the vertical dynamic and static asphalt ductility test is carried out, so that the low-temperature asphalt sample is prevented from being vertically hung in an arc-shaped bending state and affecting the ductility test of the asphalt. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the movable connection structure of the sealing plate and the test frame in the present application.

[0020] Figure 3 It is a schematic diagram of the internal structure of the test frame in the present application.

[0021] Figure 4 It is a schematic diagram of the connection structure of the hooking mold in the present application.

[0022] Figure 5 It is a schematic diagram of the overall structure of the present application Figure 2 It is a schematic diagram of the overall structure of the present application

[0023] Figure 1 - Figure 5Middle: 1, test frame; 101, limit slide rail; 102, elastic rope; 2, connecting shaft; 3, sealing plate; 4, handle; 5, support station foot; 6, servo motor; 601, transmission shaft; 602, rotary disc; 603, traction rope; 604, nested block; 7, connecting rod; 8, hooking plate; 9, hook; 10, hooking mold; 11, low temperature asphalt sample; 12, hooking slide plate; 1201, limit slide rod; 13, weight disc; 1301, counterweight weight. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0025] As shown in Figure 1 - Figure 5 In the present embodiment, an asphalt low temperature ductility testing device includes a test frame 1 and a hooking mold 10. The hooking mold 10 is fitted with a low temperature asphalt sample 11 on the inner side. The test frame 1 is fixedly installed with a limit slide rail 101 on both sides of the inner part. The limit slide rail 101 is movably installed with a hooking slide plate 12 in the middle. The hooking slide plate 12 is fixedly installed with a limit slide rod 1201 on both sides. The limit slide rod 1201 is fitted and movably installed on the inner side of the limit slide rail 101. One side of the test frame 1 is fixedly installed with a servo motor 6 for providing power. One end of the inner part of the test frame 1 is fitted and movably installed with a transmission shaft 601. The transmission shaft 601 is in transmission connection with the servo motor 6. The middle of the transmission shaft 601 is fixedly installed with a rotary disc 602. The inner side of the rotary disc 602 is wound with a traction rope 603. One side of the transmission shaft 601 is provided with a nested block 604. The nested block 604 is fixedly connected with the test frame 1. The other end of the inner part of the test frame 1 is fixedly connected with a connecting rod 7. The lower part of the connecting rod 7 is fixedly installed with a hooking plate 8 for hooking the hooking mold 10.

[0026] Specifically, through this kind of setting, in use, since the low temperature asphalt sample 11 fills the inside of the hooking mold 10, and the low temperature asphalt sample 11 slows down the movement of asphalt molecules, making the low temperature asphalt sample 11 more viscous, this increase in viscosity makes the asphalt better maintain its shape, and on the surface in contact with the hooking mold 10, it can be more firmly attached to the mold, through this characteristic of low temperature asphalt itself, it can resist tension to avoid being pulled out of the hooking mold 10, first remove the weight disc 13 from the hooking slide plate 12, and hook the traction rope 603 to the hook 9 below the hooking slide plate 12, when the servo motor 6 is started, the motor shaft drives the transmission shaft 601 to rotate, the transmission shaft 601 drives the rotating disc 602 to rotate synchronously, in the rotating process, the traction rope 603 on the rotating disc 602 is gradually retracted as it rotates, the traction rope 603 is connected to the hooking slide plate 12 through the hook 9, and then pulls the hooking slide plate 12 to move along the limiting slide rail 101 through the limiting slide rod 1201, thereby exerting a dynamic pulling force on the low temperature asphalt sample 11, at the same time, through the connection of the hook 9 and the hooking mold 10, when the hooking slide plate 12 is pulled to move downward, the low temperature asphalt sample 11 is subjected to a dynamic active rope elongation test, and the scale mark provided on the limiting slide rail 101, secondly, the nested block 604 assists the rotation of the transmission shaft 601 to prevent displacement or shaking of the transmission shaft 601, thereby ensuring the stability of the pulling force exerted on the asphalt sample.

[0027] As Figure 1 - Figure 5 shown, in this embodiment, a connecting shaft 2 is embedded and installed on one side of the test stand 1, a support foot 5 is fixedly installed below the test stand 1, a sealing plate 3 is provided on both sides of the test stand 1, and the sealing plate 3 on one side is fixedly connected with the test stand 1, and the sealing plate 3 on the other side is movably connected with the test stand 1 through the connecting shaft 2, a handle 4 is fixedly installed on one side of the sealing plate 3 on the other side, a hook 9 is fixedly installed on one side of the hooking plate 8, and the hooks 9 are fixedly installed on both ends of the hooking mold 10 and the hooking slide plate 12.

[0028] Specifically, through this kind of setting, the test stand 1 provides structural support for the entire device, and the hooking plate 8 is installed on the test stand 1 through the connecting rod 7, and the device can be stably placed for use through the support foot 5 below, in use, the connecting shaft 2 is operated by the handle 4 to open the sealing plate 3 on the other side, so that the hooking mold 10 with the low temperature asphalt sample 11 can be hooked on the hook 9 below the hooking plate 8 for elongation test, and when the asphalt elongation test is performed, the sealing plate 3 on the other side is closed to reduce the interference of external wind and other factors, and the sealing plate 3 is made of transparent material to facilitate observation during the asphalt elongation test.

[0029] As Figure 1 -Figure 5 As shown, in the embodiment, the inner side of the limiting slide rail 101 is provided with an elastic rope 102, and the two ends of the elastic rope 102 are respectively fixedly connected with the test frame 1 and the limiting slide rod 1201, the lower side of the hooking slide plate 12 is provided with a weight disc 13, and the weight disc 13 is hookingly connected with the hooking slide plate 12 through the hook 9, and the counterweight weight 1301 is embedded and placed on the weight disc 13;

[0030] Specifically, through the arrangement, when the asphalt sample is stretched, the limiting slide rod 1201 on both sides of the hooking slide plate 12 slides in the inner side of the limiting slide rail 101, when the hooking slide plate 12 moves along the limiting slide rail 101 under the action of the gravity of the counterweight weight 1301 below, the direction of the pulling force applied to the asphalt sample is always kept consistent, so that the stretching state of the asphalt under actual stress is more accurately simulated, secondly, the elastic pulling force of the elastic rope 102 is adapted to the gravity on the hooking slide plate 12 and the weight disc 13 in the initial state, and then the counterweight weight 1301 is used to test the static gravity ductility of the low-temperature asphalt sample 11, at the same time, the elastic rope 102 can also assist the hooking slide plate 12 to return to the initial position after the test is completed, so as to perform the next test.

[0031] Need to explain, when using the utility model discloses a kind of asphalt low temperature ductility testing device, first, test stand 1 provides structural support for entire device, and through connecting rod 7, it is installed in test stand 1 with hooking plate 8, device is placed stably with support station foot 5, when using, hand handle 4 drives connecting shaft 2 to operate, the sealing plate 3 of other side is opened, it is convenient to carry out ductility test with the hooking mold 10 with low temperature asphalt sample 11 is hooked in the hook 9 below hooking plate 8, when asphalt ductility test is carried out, sealing plate 3 is closed to reduce external wind force etc. Interference, when stretching asphalt sample, the limiting slide bar 1201 of hooking slide plate 12 side is slid in the inside portion of limiting slide rail 101, hooking slide plate 12 moves along limiting slide rail 101 under the gravity of counterweight weight 1301, ensure that the direction of tension applied to asphalt sample always remains consistent, the elastic tension of elastic rope 102 is adapted to the gravity on hooking slide plate 12 and weight disc 13 in initial state, to further test the static gravity of low temperature asphalt sample 11, after testing, elastic rope 102 can also assist hooking slide plate 12 to return to initial position, so as to carry out next test, first, weight disc 13 is removed from hooking slide plate 12, then pull rope 603 is connected with hook 9 below hooking slide plate 12, after starting servo motor 6, motor shaft drives transmission shaft 601 to rotate, transmission shaft 601 drives rotary disc 602 to rotate synchronously, pull rope 603 on rotary disc 602 is gradually retracted, is connected with hook 9 and hooking slide plate 12, pull hooking slide plate 12 moves along limiting slide rail 101, applies dynamic traction tension to low temperature asphalt sample 11, at the same time, the connection of hook 9 and hooking mold 10 makes hooking slide plate 12 move downward, to carry out dynamic active rope ductility test of low temperature asphalt sample 11, measurement is carried out through scale mark set on limiting slide rail 101, in addition, nested block 604 assists transmission shaft 601 to rotate, prevents displacement or shaking, to ensure that the tension applied to asphalt sample is stable.

[0032] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation. The utility model is not limited by the above examples, and the above examples and the description are only the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements fall within the scope of the claimed utility model. The embodiments are selected and described in detail in the specification in order to better explain the principles and practical applications of the utility model, so that the skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents.

Claims

1. A low-temperature ductility testing device for asphalt, comprising a test frame (1) and a hook mold (10), wherein a low-temperature asphalt sample (11) is fitted and installed on the inner side of the hook mold (10), characterized in that: The test frame (1) has a limit slide rail (101) fixedly installed on both sides inside, and a hook slide plate (12) is movably installed in the middle of the limit slide rail (101). Limit slide rods (1201) are fixedly installed on both sides of the hook slide plate (12), and the limit slide rods (1201) are fitted and movably installed inside the limit slide rail (101). A servo motor (6) for providing power is fixedly installed on one side of the test frame (1). A drive shaft (601) is fitted and movably installed at one end inside the test frame (1), and the drive shaft (601) is connected to the drive shaft on the servo motor (6). A rotating disk (602) is fixedly installed in the middle of the drive shaft (601), and a traction rope (603) is wound around the inner side of the rotating disk (602). A connecting rod (7) is fixedly connected to the other end inside the test frame (1), and a hook plate (8) for hooking and hanging the mold (10) is fixedly installed below the connecting rod (7).

2. The asphalt low-temperature ductility testing device according to claim 1, characterized in that, A connecting shaft (2) is fitted on one side of the test frame (1), and a supporting foot (5) is fixedly installed below the test frame (1).

3. The asphalt low-temperature ductility testing device according to claim 1, characterized in that, The test frame (1) is provided with sealing plates (3) on both sides. One sealing plate (3) is fixedly connected to the test frame (1), and the other sealing plate (3) is movably connected to the test frame (1) through a connecting shaft (2). A handle (4) is fixedly installed on one side of the other sealing plate (3).

4. The asphalt low-temperature ductility testing device according to claim 1, characterized in that, A hook (9) is fixedly installed on one side of the hook plate (8), and hooks (9) are fixedly installed on both ends of the hook mold (10) and both ends of the hook slide plate (12).

5. The asphalt low-temperature ductility testing device according to claim 1, characterized in that, An elastic rope (102) is provided on the upper inner side of the limiting slide rail (101), and the two ends of the elastic rope (102) are fixedly connected to the test frame (1) and the limiting slide rod (1201) respectively.

6. The asphalt low-temperature ductility testing device according to claim 1, characterized in that, Below the hook-and-slide plate (12) is a weight plate (13), and the weight plate (13) is detachably connected to the hook-and-slide plate (12) via a hook (9). A counterweight (1301) is embedded in the weight plate (13). A nesting block (604) is provided on one side of the drive shaft (601), and the nesting block (604) is fixedly connected to the test frame (1).

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