An asphalt mixture rut specimen molding device

Abstract

The utility model relates to a kind of asphalt mixture rut specimen forming device, it relates to a forming device.The utility model is to solve the problem of high risk of scalding and big operation difficulty when sample on wheel rolling forming machine is reversed direction.The utility model is simple structure, reversing is convenient, since the stroke of disc cam is greater than the depth of sample mold embedded moving base, so when disc cam is in push phase when L-shaped rod is moved, sample mold can be pushed out from moving base;At the same time, since the lower surface of sample mold and shaft ring are provided with thrust bearing, sample mold can be easily reversed direction, the above process is easy and convenient, reduce the operation difficulty of test personnel, and also avoid the risk of test personnel being scalded.The utility model belongs to the technical field of asphalt rut test.

Description

Technical Field

[0001] This utility model relates to a molding device, specifically to a molding device for asphalt mixture rutting samples, belonging to the field of asphalt rutting test technology. Background Technology

[0002] Rutting tests on asphalt mixtures are an important method for evaluating the resistance of asphalt pavements to permanent deformation. This test simulates the repeated action of actual traffic loads on the pavement and evaluates the rutting resistance of the mixture by measuring the deformation of the specimen under standard conditions. It can help engineers and designers determine the most suitable asphalt mixture type and formulation for specific road conditions and traffic loads.

[0003] When preparing specimens for rutting tests, the wheel-rolling method is widely used because the internal aggregate interlocking and arrangement shape of the specimens formed by the wheel-rolling method better matches the actual road conditions. The "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000) stipulates that during compaction, the specimen should be rolled twice in one direction, and after unloading, the direction should be reversed and rolled again for 12 rounds. However, during the use of current wheel-rolling forming machines, the heavy weight of the mold filled with asphalt mixture and the residual heat of the specimen during the reversal (usually above 100°C) not only increase the difficulty of operation for the test personnel, but also pose a threat of burns to the test personnel.

[0004] In summary, how to propose a novel molding device to address the aforementioned technical problems has become a pressing issue for those skilled in the art. Utility Model Content

[0005] This invention addresses the shortcomings of the prior art by providing an asphalt mixture rutting sample forming device.

[0006] The technical solution of this utility model is: an asphalt mixture rutting sample forming device, including a hydraulic pump station, a frame and a rolling wheel; a first oil cylinder and a second oil cylinder are installed on the frame, both the first oil cylinder and the second oil cylinder are connected to the hydraulic pump station through a reversing valve, the first oil cylinder is arranged parallel to the horizontal plane, the second oil cylinder is arranged perpendicular to the horizontal plane, and the rolling wheel is hinged to the telescopic rod of the second oil cylinder.

[0007] Furthermore, it also includes a sample mold, a moving base, and a reversing unit.

[0008] A positioning groove is opened at the center of the lower surface of the sample mold, and the sample mold is embedded in the movable base.

[0009] The movable base is hinged to the telescopic rod of the first hydraulic cylinder, the movable base is slidably connected to the frame, and the bottom of the movable base has a through hole.

[0010] The reversing unit comprises an L-shaped rod, a disc cam and a lifting mandrel.

[0011] The lifting mandrel and the disc cam are arranged in the mobile base, and the lifting mandrel comprises a first shaft segment, a shaft ring and a second shaft segment arranged integrally.

[0012] The second shaft segment is inserted into the through hole, the first shaft segment is inserted into the positioning groove, and a thrust bearing is mounted on the first shaft segment, and the two end faces of the thrust bearing are respectively abutted against the upper surface of the shaft ring and the sample mold, and the lower surface of the shaft ring and the mobile base are abutted against the circumferential surface of the disc cam.

[0013] The L-shaped rod is rotationally connected with the mobile base, one end of the L-shaped rod is sleeved with an extension pipe, and the other end of the L-shaped rod passes through the side wall of the mobile base and is fixedly connected with the disc cam.

[0014] Compared with the prior art, the present application has the following effects:

[0015] The present application has the following effects: the stroke of the disc cam 420 is greater than the depth of the sample mold 200 embedded in the mobile base 300, so that the sample mold 200 can be pushed out of the mobile base 300 by moving the L-shaped rod 410 to make the disc cam 420 in the push stage; at the same time, the lower surface of the sample mold 200 and the shaft ring are provided with a thrust bearing 450, so that the sample mold 200 can be easily turned, the above process is easy and convenient, the operation difficulty of the test personnel is reduced, and the risk of being scalded by the test personnel is also avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the front view of the present application;

[0017] Figure 2 is the axonometric view of the sample mold 200 and the mobile base 300 in the present application;

[0018] Figure 3 is the axonometric view of the mobile base 300 and the reversing unit 400 in the present application;

[0019] Figure 4 is Figure 3 is the local enlarged view of I in the present application;

[0020] Figure 5 is the schematic view of the disc cam 420 in the push stage;

[0021] Figure 6 is the schematic view of the sample mold 200 being pushed out of the mobile base 300.

[0022] In the figure: 100, rack; 110, first oil cylinder; 120, second oil cylinder; 130, rolling wheel; 140, horizontal table; 150, gantry; 200, sample mold; 210, tenon; 220, handle; 300, moving base; 310, clamping groove; 320, angle limiting block; 400, reversing unit; 410, L-shaped rod; 420, disc-shaped cam; 430, lengthened pipe; 440, lifting mandrel; 450, thrust bearing; 500, straight line sliding rail; 510, sliding block. DETAILED DESCRIPTION

[0023] In order to make the utility model purposes, features, advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model.

[0024] Specific embodiment one: in combination with Figures 1 to 6 In this embodiment, the asphalt mixture rut sample forming device comprises a hydraulic pump station, a rack 100 and a rolling wheel 130. The first oil cylinder 110 and the second oil cylinder 120 are installed on the rack 100. The first oil cylinder 110 and the second oil cylinder 120 are both connected with the hydraulic pump station through a reversing valve. The first oil cylinder 110 is arranged in parallel with the horizontal plane, and the second oil cylinder 120 is arranged perpendicularly to the horizontal plane. The rolling wheel 130 is hinged with the telescopic rod of the second oil cylinder 120. Preferably, a heating part is arranged inside the rolling wheel 130, and the heating part is connected with a power supply.

[0025] Further, the device further comprises a sample mold 200, a moving base 300 and a reversing unit 400.

[0026] A positioning groove is formed in the center of the lower surface of the sample mold 200. The sample mold 200 is embedded in the moving base 300.

[0027] The moving base 300 is hinged with the telescopic rod of the first oil cylinder 110. The moving base 300 is slidingly connected with the rack 100. A through hole is formed in the bottom of the moving base 300.

[0028] The reversing unit 400 comprises an L-shaped rod 410, a disc-shaped cam 420 and a lifting mandrel 440.

[0029] The lifting mandrel 440 and the disc-shaped cam 420 are both arranged in the moving base 300. The lifting mandrel 440 comprises a first shaft section, a shaft ring and a second shaft section which are integrally arranged.

[0030] The second shaft segment is inserted into the through hole, the first shaft segment is inserted into the positioning groove, and the first shaft segment is provided with a thrust bearing 450, two end faces of the thrust bearing 450 are respectively in abutment with the upper surface of the shaft ring and the sample mold 200, the lower surface of the shaft ring and the moving base 300 are in abutment with the circumferential surface of the disc-shaped cam 420, and the stroke of the disc-shaped cam 420 is greater than the depth of the sample mold 200 embedded in the moving base 300.

[0031] The L-shaped rod 410 is rotationally connected with the moving base 300, one end of the L-shaped rod 410 is sleeved with the lengthened pipe 430, and the other end of the L-shaped rod 410 passes through the side wall of the moving base 300 and is fixedly connected with the disc-shaped cam 420.

[0032] Specific implementation two: in combination Figures 1 to 6 It is explained that the rack 100 includes the horizontal board 140 and the gantry 150 in the embodiment.

[0033] The first oil cylinder 110 is installed on the horizontal board 140, the second oil cylinder 120 is installed on the horizontal section of the gantry 150, and the vertical section of the gantry 150 is provided with a guide groove.

[0034] The rolling wheel 130 is hingedly connected with the telescopic rod of the second oil cylinder 120 through a pin shaft, and both ends of the pin shaft are embedded in the guide groove.

[0035] Further, a linear slide rail 500 and a sliding block 510 are further included.

[0036] The linear slide rail 500 is installed on the horizontal board 140, the sliding block 510 is installed on the lower surface of the moving base 300, and the sliding block 510 is slidably connected with the linear slide rail 500.

[0037] Other components and connection relationships are the same as those in the first specific implementation.

[0038] Specific implementation three: in combination Figures 1 to 6 It is explained that the rack 100 includes the horizontal board 140 and the gantry 150 in the embodiment.

[0039] Further, the upper end surface of the moving base 300 is symmetrically provided with two clamping grooves 310, and the clamping grooves 310 are matched with the tenons 210.

[0040] Further, the side wall of the moving base 300 is integrally provided with two angle limiting blocks 320, and the two angle limiting blocks 320 are distributed on both sides of the axis of the L-shaped rod 410.

[0041] Further, the inner wall of the moving base 300 is integrally provided with a reinforcing rib, and the lower surface of the sample mold 200 abuts against the upper surface of the reinforcing rib, so that the sample mold 200 is stably embedded in the moving base 300 through the reinforcing rib and the lifting mandrel 440.

[0042] Further, the side wall of the sample mold 200 is provided with a handle 220.

[0043] The other components and connection relationships are the same as those in the first or second embodiment.

[0044] Working principle

[0045] The utility model is used in conjunction with a hydraulic pump station, and the first oil cylinder 110 and the second oil cylinder 120 are connected to the hydraulic pump station through a reversing valve (such as a manual reversing valve).

[0046] After the mixed asphalt mixture is loaded into the sample mold 200, the positioning groove at the bottom of the sample mold 200 is matched with the first shaft segment, and the lower surface of the sample mold 200 abuts against the upper surface of the reinforcing rib, so that the sample mold 200 is stably embedded in the moving base 300.

[0047] The height of the rolling wheel 130 is lowered through the second oil cylinder 120, so that the outer circumferential surface of the rolling wheel 130 abuts against the upper surface of the asphalt mixture; the moving base 300 reciprocally slides on the rack 100 through the first oil cylinder 110, and the rolling wheel 130 also reciprocally swings with the moving base 300, so that the asphalt mixture is rolled.

[0048] When the sample mold 200 needs to be turned, the following steps are performed:

[0049] Step one, the moving base 300 stops sliding, and at this time, the L-shaped rod 410 abuts against one angle limiting block 320.

[0050] Step two, the lengthened pipe 430 is sleeved on the L-shaped rod 410, and then the lengthened pipe 430 is moved to rotate the disc-shaped cam 420, and in this process, the disc-shaped cam 420 is in the pushing stage; since the stroke of the disc-shaped cam 420 is greater than the depth of the sample mold 200 embedded in the moving base 300, the disc-shaped cam 420 can push the sample mold 200 out of the moving base 300, and at this time, the L-shaped rod 410 abuts against the other angle limiting block 320.

[0051] Step three, rotate the sample mold 200 180°, because the first shaft section is inserted in the positioning groove, and the lower surface of the sample mold 200 and the shaft ring are provided with the thrust bearing 450, so that the sample mold 200 can be easily turned over; then move the lengthened pipe 430 in the opposite direction of step two, in this process, the disc-shaped cam 420 is in the return phase, and the sample mold 200 is embedded in the moving base 300 again.

[0052] Step four, the moving base 300 reciprocatingly slides, the height of the rolling wheel 130 is lowered, and the asphalt mixture is continuously formed by rolling.

[0053] The utility model has disclosed above with preferable implementation, however not use to limit the utility model, any familiar professional technical personnel, do not leave the content of the utility model technical scheme, according to the technical essence of the utility model with the simple modification, equivalent change and modification of the above implementation case, still belong to the utility model technical scheme range.

Claims

1. An asphalt mixture rutting sample forming device, comprising a hydraulic pump station, a frame (100), and a compaction wheel (130); a first hydraulic cylinder (110) and a second hydraulic cylinder (120) are mounted on the frame (100), both the first hydraulic cylinder (110) and the second hydraulic cylinder (120) are connected to the hydraulic pump station through a reversing valve, and the first hydraulic cylinder (110) is arranged parallel to the horizontal plane, the second hydraulic cylinder (120) is arranged perpendicular to the horizontal plane, and the compaction wheel (130) is hinged to the telescopic rod of the second hydraulic cylinder (120), characterized in that: It also includes a sample mold (200), a movable base (300), and a reversing unit (400); The sample mold (200) has a positioning groove at the center of its lower surface, and the sample mold (200) is embedded in the movable base (300). The movable base (300) is hinged to the telescopic rod of the first oil cylinder (110), the movable base (300) is slidably connected to the frame (100), and the bottom of the movable base (300) has a through hole. The reversing unit (400) includes an L-shaped rod (410), a disc cam (420), and a lifting spindle (440). The lifting spindle (440) and the disc cam (420) are both arranged in the movable base (300). The lifting spindle (440) includes an integrally formed first shaft section, a collar and a second shaft section. The second shaft section is inserted into the through hole, the first shaft section is inserted into the positioning groove, and a thrust bearing (450) is installed on the first shaft section. The two ends of the thrust bearing (450) abut against the sample mold (200) and the upper surface of the collar, respectively. The lower surface of the collar and the movable base (300) abut against the circumferential surface of the disc cam (420). The L-shaped rod (410) is rotatably connected to the movable base (300), and one end of the L-shaped rod (410) is fitted with an extension tube (430), and the other end of the L-shaped rod (410) passes through the side wall of the movable base (300) and is fixedly connected to the disc cam (420).

2. The asphalt mixture rut sample forming device according to claim 1, characterized in that: The rack (100) includes a horizontal cutting board (140) and a gantry (150). The first oil cylinder (110) is installed on the horizontal cutting board (140), and the second oil cylinder (120) is installed on the horizontal section of the gantry frame (150), and the vertical section of the gantry frame (150) has a guide groove. The rolling wheel (130) is hinged to the telescopic rod of the second oil cylinder (120) via a pin, and both ends of the pin are embedded in the guide groove.

3. The asphalt mixture rutting sample forming device according to claim 2, characterized in that: It also includes a linear guide rail (500) and a slider (510); The linear slide rail (500) is mounted on the horizontal cutting board (140), and the slider (510) is mounted on the lower surface of the movable base (300). The slider (510) is slidably connected to the linear slide rail (500).

4. The asphalt mixture rutting sample forming device according to claim 3, characterized in that: It also includes two tenons (210), which are symmetrically arranged on the two side walls of the sample mold (200).

5. The asphalt mixture rut sample forming device according to claim 4, characterized in that: The upper surface of the movable base (300) has two symmetrical slots (310) that are adapted to the tenon (210).

6. The asphalt mixture rutting sample forming device according to claim 5, characterized in that: Two angle limiting blocks (320) are integrally provided on the side wall of the movable base (300), and the two angle limiting blocks (320) are distributed on both sides of the axis of the L-shaped rod (410).

7. The asphalt mixture rutting sample forming device according to claim 6, characterized in that: The inner wall of the movable base (300) is integrally provided with reinforcing ribs, and the lower surface of the sample mold (200) abuts against the upper surface of the reinforcing ribs.

8. The asphalt mixture rut sample forming device according to claim 7, characterized in that: A handle (220) is installed on the side wall of the sample mold (200).

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