Asphalt ductility sample forming device

Abstract

The utility model relates to the technical field of road engineering detection equipment, and discloses an asphalt ductility sample forming device which comprises a bottom die, two end dies and two side dies are connected to the inner wall of the bottom die in a sliding mode, a cover plate is detachably arranged at the top of the bottom die, a pouring opening is formed in the surface of the cover plate, and the pouring opening is communicated with the bottom die. A lifting frame is detachably arranged at the bottom of the bottom die, four limiting mechanisms are arranged on the surface of the cover plate, two first limiting blocks matched with the end die in shape are fixed to the bottom of the inner wall of the bottom die, an embedding plate is fixed to the top of the lifting frame, and an embedding groove matched with the embedding plate is formed in the bottom of the bottom die. Sealing strips which are independently arranged are fixed at the top edges of the end molds and the side molds. According to the asphalt ductility sample forming device, the problem of bubble retention in traditional back-and-forth pouring can be solved, it is guaranteed that the forming faces except the pouring opening are flush with the top face of the end mold, and the problem that the asphalt top face of a traditional narrow part is difficult to treat is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering detection equipment technical field, concretely is a kind of asphalt ductility test sample forming device. BACKGROUND

[0002] Asphalt ductility refers to the extensibility of asphalt, and the test method of ductility is to make the asphalt sample into an 8-shaped standard test piece, and the elongation value when the test piece is broken at a specified tensile speed at a specified temperature is called ductility. The greater the ductility, the better the plasticity of the asphalt. Ductility is also related to the low-temperature crack resistance of asphalt.

[0003] The conventional device is to slowly inject the molten asphalt sample into the mold from one end to the other end of the mold for several times, and finally slightly higher than the test mold. After cooling to room temperature, the asphalt that is higher than the test mold is scraped off with a hot scraper to make the asphalt flush with the test mold surface. However, the manual back-and-forth pouring flow rate is uneven, which easily traps air bubbles to cause necking or internal cavities of the test sample, and the main problem affecting the test result is the asphalt treatment of the narrow part. Due to the difficulty in temperature of the hot scraper, the narrow part of the asphalt will be slightly concave after cooling and scraping, thereby affecting the test result. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present utility model is to provide an asphalt ductility test sample forming device to solve the problems raised in the background art.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: an asphalt ductility test sample forming device, comprising a bottom mold, two end molds and two side molds are slidably connected to the inner wall of the bottom mold, a cover plate is detachably arranged on the top of the bottom mold, a pouring opening is arranged on the surface of the cover plate, a lifting frame is detachably arranged on the bottom of the bottom mold, four limiting mechanisms are arranged on the surface of the cover plate, two first limiting blocks matching the shape of the end mold are fixed to the bottom of the inner wall of the bottom mold, an embedded plate is fixed to the top of the lifting frame, an embedded groove is formed in the bottom of the bottom mold to accommodate the embedded plate, a sealing strip is fixed to the top edge of the end mold and the side mold, and a sealing groove is formed in the bottom of the cover plate to accommodate the sealing strip.

[0006] Preferably, the limiting mechanism comprises a mounting shell, the mounting shell is fixedly connected to the surface of the cover plate, a spring is fixed to the inner wall of the mounting shell, one end of the spring is fixedly connected to a positioning block, the positioning block is designed in a semicircular structure at one end, and a plurality of limiting grooves are formed in the surface of the bottom mold to accommodate the positioning block.

[0007] Preferably, two guide plates are fixed to the front and rear sides of the surface of the bottom mold, and a guide groove is formed in the inner wall of the cover plate to accommodate the guide plate.

[0008] Preferably, a magnet is fixed on the top of the inner wall of the embedded groove, and the embedded plate is made of iron.

[0009] Preferably, a rubber friction pad is fixed on the bottom of the lifting frame, and a plurality of anti-skid grooves are formed on the surface of the rubber friction pad.

[0010] Preferably, the bottom of the cover plate is fixed with a second limiting block in the shape of a matching end mold.

[0011] Preferably, the bottom edge of the embedded groove is chamfered.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] Firstly, the cover plate and the bottom mold are combined, the lifting frame and the embedded plate and the embedded groove are assembled, the whole mold is rotated by 15 degrees, the operation space is formed, the asphalt is uniformly and stably filled in the mold cavity under the action of gravity, the bubble stagnation problem of traditional back-and-forth pouring is eliminated, and the forming surface except the pouring opening is flush with the top surface of the end mold, so that the traditional asphalt top surface treatment difficulty problem of the narrow part is solved.

[0014] Secondly, when the cover plate is pressed down, the hemispherical end of the positioning block contacts the surface of the bottom mold, the spring is compressed under stress, the positioning block enters the inside of the installation shell, after the cover plate is completely in place, the positioning block is automatically clamped into the limiting groove under the action of the spring to form mechanical locking, and the cover plate cannot be separated from the bottom mold during pouring. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0016] Figure 2 It is a three-dimensional structure schematic view of the utility model after operation;

[0017] Figure 3 It is a local structure schematic view of the utility model;

[0018] Figure 4 It is a local sectional structure schematic view of the utility model after splitting;

[0019] Figure 5 It is a sectional structure schematic view of the limiting mechanism in the utility model.

[0020] Wherein: 1, bottom mold; 2, end mold; 3, side mold; 4, cover plate; 5, pouring opening; 6, lifting frame; 7, limiting mechanism; 701, installation shell; 702, spring; 703, positioning block; 704, limiting groove; 8, first limiting block; 9, embedded plate; 10, embedded groove; 11, rubber friction pad; 12, second limiting block; 13, sealing strip; 14, sealing groove; 15, guide plate; 16, guide groove; 17, magnet. DETAILED DESCRIPTION

[0021] The utility model will be further described in detail below with the specific embodiments of the utility model in conjunction with the drawings.

[0022] Please refer to Figures 1-5 A bitumen ductility sample forming device, including bottom die 1, two end moulds 2 and two side moulds 3 are slidably connected on the inner wall of bottom die 1, the top of bottom die 1 is detachably provided with cover plate 4, the surface of cover plate 4 is provided with pouring opening 5, the bottom of bottom die 1 is detachably provided with lifting frame 6, the surface of cover plate 4 is provided with four limiting mechanisms 7, the inner wall of bottom die 1 is fixed with two first limiting blocks 8 matched with the shape of end mould 2 at the bottom, the top of lifting frame 6 is fixed with embedded plate 9, the bottom of bottom die 1 is provided with embedded groove 10 matched with embedded plate 9, the top edge of end mould 2 and side mould 3 is fixed with independently arranged sealing strip 13, the bottom of cover plate 4 is provided with sealing groove 14 matched with multiple sealing strips 13.

[0023] Through the above technical scheme, bottom die 1 is used as the core bearing structure, and the inner wall is closely combined with end mould 2 and side mould 3, when the device is assembled, end mould 2 is pushed to the first limiting block 8 along the right side of bottom die 1 to be accurately positioned, then two side moulds 3 and another end mould 2 are put in, forming an 8-shaped standard test mould cavity, cover plate 4 is connected with the top of bottom die 1 through the locking effect of limiting mechanism 7, and the bottom sealing groove 14 is matched with the sealing strip 13, so that the sealing strip 13 is deformed to fill the sealing groove 14, forming a sealing structure, which can effectively prevent bitumen from penetrating and overflowing, the pouring opening 5 exposes half of the side mould 3, ensuring that the bitumen has enough space for pouring, and the lifting frame 6 is assembled with the embedded groove 10 at the bottom of bottom die 1 through the embedded plate 9, so that the test mould is rotated by 15 degrees as a whole, forming an operation space, so that the bitumen fills the mould cavity at a constant speed under the action of gravity, eliminating the problem of bubble stagnation caused by traditional back-and-forth pouring, and ensuring that the forming surface except the pouring opening 5 is flush with the top surface of end mould 2, thereby solving the problem of difficult bitumen top surface treatment in the traditional narrow part.

[0024] The limiting mechanism 7 includes a mounting shell 701 fixedly connected with the surface of the cover plate 4, a spring 702 fixedly connected to the inner wall of the mounting shell 701, a positioning block 703 fixedly connected to one end of the spring 702, and a semicircular structure designed at one end of the positioning block 703.

[0025] Through the above technical scheme, when the cover plate 4 is pressed down, the semispherical end of the positioning block 703 contacts the surface of the bottom die 1, the spring 702 is compressed under stress, and the positioning block 703 enters the inside of the mounting shell 701, after the cover plate 4 is completely in place, the positioning block 703 is automatically clamped into the limiting groove 704 under the action of the spring 702 to form a mechanical lock, ensuring that the cover plate 4 will not be separated from the bottom die 1 during pouring.

[0026] Two guide plates 15 are fixed on the front and back sides of the surface of the bottom die 1, and a guide groove 16 is formed in the inner wall of the cover plate 4 to accommodate the guide plate 15.

[0027] Through the above technical solution, during the pressing process of the cover plate 4, the guide plate 15 can enter the inside of the guide groove 16, thereby guiding the installation position of the cover plate 4, ensuring that the positioning block 703 can finally enter the inside of the limiting groove 704, and avoiding the left and right sliding of the cover plate 4 on the surface of the bottom die 1.

[0028] The inner wall top of the embedded groove 10 is fixed with a magnet 17, and the embedded plate 9 is made of iron.

[0029] Through the above technical solution, the magnet 17 can attract the embedded plate 9 by magnetic force, thereby improving the connection strength between the lifting frame 6 and the bottom die 1, and ensuring that the lifting frame 6 and the bottom die 1 can be quickly disassembled.

[0030] The bottom of the lifting frame 6 is fixed with a rubber friction pad 11, and a plurality of anti-skid grooves are formed on the surface of the rubber friction pad 11.

[0031] Through the above technical solution, the design of the rubber friction pad 11 and the anti-skid groove can increase the friction effect, so that the bottom die 1 and the lifting frame 6 can obtain the anti-skid effect.

[0032] The bottom of the cover plate 4 is fixed with a second limiting block 12 matched with the shape design of the end die 2.

[0033] Through the above technical solution, after the cover plate 4 is installed on the surface of the bottom die 1, the surface of the second limiting block 12 will be attached to the surface of the right side die 3, so that the entire mold can be limited, preventing the end die 2 and the side die 3 from moving during pouring.

[0034] The bottom edge of the embedded groove 10 is chamfered.

[0035] Through the above technical solution, when the embedded plate 9 is placed in the embedded groove 10, it can be guided by the chamfered surface of the embedded groove 10, making it easier to put the embedded plate 9 into the embedded groove 10.

[0036] In use, first, the end mold 2 is pushed along the right side of the bottom mold 1 to the first limit block 8 for accurate positioning, then two side molds 3 and another end mold 2 are put in to form an 8-shaped standard test mold cavity, then the cover plate 4 is aligned and pressed down through the guide plate 15, so that the positioning block 703 enters the limiting groove 704, the combination installation of the cover plate 4 and the bottom mold 1 is completed, then the bottom mold 1 is rotated, and the embedded plate 9 of the lifting frame 6 is put into the embedded groove 10, and a stable base is formed by magnet 17 adsorption and fixation; the bottom mold 1 can be rotated by 15 degrees, then pouring is carried out through the pouring port 5, before pouring, except that the inside of the end mold 2 is not coated with isolation agent, the rest of the mold is coated with isolation agent on the contact surface with asphalt, then the asphalt melt is injected, so that the flowing asphalt can fill the entire test mold cavity, after cooling to room temperature, the cover plate 4 is removed and the excess asphalt is scraped off with a hot scraper, and a standard test sample is obtained, then the sample can be kept warm, during the whole process, the first limit block 8 and the second limit block 12 limit the end mold 2 to prevent displacement during pouring.

[0037] Although the specific embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these specific embodiments without departing from the principles and spirits, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An asphalt ductility specimen forming device, comprising a bottom die (1), two end dies (2) and two side dies (3) are slidably connected to the inner wall of the bottom die (1), characterized in that: The bottom die (1) top detachable cover (4) is provided with, the cover (4) surface is provided with pouring mouth (5), the bottom die (1) bottom detachable setting is provided with the elevated frame (6), the cover (4) surface is provided with four limiting mechanisms (7), the bottom die (1) inner wall bottom is fixed with two first limiting blocks (8) of the shape of the end mold (2), the elevated frame (6) top is fixed with the embedded plate (9), the bottom die (1) bottom is provided with the embedded slot (10) of the embedded plate (9) is put into, the end mold (2) and side mold (3) top edge are all fixed with independently arranged sealing strips (13), the cover (4) bottom is provided with sealing groove (14) of multiple sealing strips (13) is put into.

2. An apparatus for forming a bitumen ductility test specimen according to claim 1, characterised in that: The limiting mechanism (7) includes installation shell (701), the installation shell (701) is fixedly connected with the surface of cover (4), the spring (702) is fixedly connected in the inner wall of installation shell (701), one end of spring (702) is fixed with the locating block (703), the locating block (703) one end is half circular structure design, the bottom die (1) surface is provided with multiple limiting grooves (704) of the locating block (703) is put into.

3. The asphalt ductility specimen forming device of claim 1, wherein: The bottom die (1) surface is fixed with two guide plates (15) on both sides, the cover (4) inner wall is provided with guide slot (16) of the guide plate (15) is put into.

4. The asphalt ductility specimen forming apparatus of claim 1, wherein: The embedded slot (10) inner wall top is fixed with magnet (17), the embedded plate (9) is iron material.

5. The asphalt ductility specimen forming apparatus of claim 1, wherein: The elevated frame (6) bottom is fixed with rubber friction pad (11), the rubber friction pad (11) surface is provided with multiple anti-skid grooves.

6. The asphalt ductility specimen forming apparatus of claim 1, wherein: The cover (4) bottom is fixed with the second limiting block (12) of the shape of the end mold (2) design.

7. The asphalt ductility specimen forming apparatus of claim 1, wherein: The embedded slot (10) bottom edge is chamfered.

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