Auxiliary tray device and manufacturing method for inorganic binder specimen preparation

Abstract

This invention discloses an auxiliary tray device and method for preparing inorganic binder specimens, belonging to the field of highway engineering testing technology. The tool includes a base, the upper surface of which is used to place a test barrel and a pad. The upper part of the pad is embedded in the test barrel. The upper surface of the base is provided with a groove for placing the pad, and at least two retainers are provided on the upper surface of the base, which are evenly distributed around the groove. Each retainer includes a fixed shaft and an eccentric cylindrical pin, the eccentric cylindrical pin being rotatably connected to the fixed shaft, and the upper surfaces of the fixed shaft and the eccentric cylindrical pin being flush. When the larger circular side of the eccentric cylindrical pin rotates to be close to the groove, it is located at the bottom of the test barrel, and when the smaller circular side of the eccentric cylindrical pin rotates to be close to the groove, it is located outside the test barrel. The tray tool makes the height of the test barrel more stable, resulting in a denser and flatter filling, thus improving the quality of the filling.

Description

Technical Field

[0001] This invention belongs to the field of highway engineering testing technology, specifically an auxiliary tray device for inorganic binder specimen preparation and its usage method, which is applied to the molding test of inorganic binder specimens in highways of various grades and township and municipal road projects. Background Technology

[0002] The standard compaction test is crucial in highway construction, serving as an essential test for assessing the compaction degree of pavement base materials. It is applicable to conducting compaction tests on cement-stabilized materials (before cement hydration), lime-stabilized materials, and lime (or cement) and fly ash-stabilized materials within a specified test chamber. The aim is to plot the moisture content-dry density curve of the stabilized material, thereby determining its optimum moisture content and maximum dry density.

[0003] Before conducting the compaction test, inorganic binder specimens need to be prepared. The preparation process must meet the standard test management requirements for the inorganic binder specimen preparation process of each highway project. According to the Test Procedure for Inorganic Binder Stabilized Materials in Highway Engineering (JTGF51-2009), during the preparation of inorganic binder stabilized material specimens such as cement-stabilized crushed stone in the laboratory, a test barrel is required for filling. The test barrel is a cylindrical barrel without a bottom. When filling, a pad is placed at the bottom of the test barrel. The outer diameter of the pad is adapted to the inner diameter of the test barrel so that the pad is just placed at the bottom of the test barrel. After filling, another identical pad is placed from the top of the test barrel to press on the material. The filled test barrel is then placed on the reaction frame to prepare the specimen.

[0004] Because a pad is placed at the bottom of the test barrel, the volume of material inside is reduced. The height of the test barrel is insufficient to hold the required amount of loose sample for compaction. According to the JTGE51-2009 operating procedure, the mold pad should be 40mm high, with approximately 20mm of the lower pad protruding. Supports of 20-30mm height are needed on both sides of the bottom of the test barrel to increase its volume for easier material loading. Usually, steel bars or similar materials are used to elevate the test barrel, but this structure is prone to detachment and unevenness. Due to the instability of this elevation, water-stabilized specimens are prone to being loose, the mold pressing block plane is tilted, and the specimens are incomplete after demolding. Furthermore, the test barrel used for inorganic binder molding is an iron mold. The weight of the test barrel and upper and lower pads is approximately 17kg, and the weight after filling with inorganic binder is approximately 23kg-25kg. It needs to be carried manually, sometimes requiring two people to place it on a reaction frame for specimen fabrication, which is heavy and dangerous. The smooth and heavy mold also poses a safety hazard. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and proposes an auxiliary tray device and a method for preparing inorganic binder specimens, solving the problems of unstable loading and low loading quality during the preparation of inorganic binder specimens.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0007] An auxiliary tray device for preparing inorganic binder specimens includes a base. The upper surface of the base is used to place a test barrel and a pad. The outer diameter of the pad matches the inner diameter of the test barrel, allowing the pad to be embedded inside. The upper surface of the base has a groove for placing the pad, and at least two retainers are provided on the upper surface of the base, evenly distributed around the groove. Each retainer includes a fixed shaft and an eccentric cylindrical pin. The eccentric cylindrical pin is rotatably connected to the fixed shaft, and the upper surfaces of the fixed shaft and the eccentric cylindrical pin are flush. When the larger circular side of the eccentric cylindrical pin is rotated to be close to the groove, it is located at the bottom of the test barrel, which is used to raise the bottom of the test barrel, while the bottom of the pad is exposed, increasing the filling space inside the test barrel. After filling, the smaller circular side of the eccentric cylindrical pin is rotated to be close to the groove, so that the retainer is located outside the test barrel. At this time, the inorganic binder inside the test barrel is pressed by a reaction frame to prepare the specimen.

[0008] Furthermore, the groove matches the structure of the bottom of the pad, allowing the pad to be embedded in the groove.

[0009] Furthermore, the upper surface of the base is provided with two card holders, which are symmetrically arranged on opposite sides of the groove.

[0010] Furthermore, the fixing pin has a cylindrical structure, and its lower surface is fixedly connected to the upper surface of the base.

[0011] Furthermore, a handle for rotating the eccentric cylindrical pin is connected to the eccentric cylindrical pin.

[0012] Furthermore, two handles are symmetrically arranged on the upper surface edge of the base.

[0013] Furthermore, the handle is made of HPB300 round steel with a diameter of 10mm.

[0014] Furthermore, the base is a cylindrical steel plate structure.

[0015] The manufacturing method of the auxiliary tray device includes the following steps:

[0016] 1) Place the pad into the groove on the base, rotate the eccentric cylindrical pin of the card holder to the support position, that is, tangent to the outer edge of the groove, then put the test bucket over the pad and place it on the card holder, raise the test bucket and expose the bottom of the pad to increase the volume inside the test bucket.

[0017] 2) Then, the inorganic binder is loaded into the test barrel by tamping. After that, an upper pad is placed on the top of the test barrel. The tray tool, along with the test barrel and the pad, is placed on the reaction frame. Then, the eccentric cylindrical pin of the clamp is rotated out of the support position. Because the loading is done by tamping, the test barrel will not fall due to the friction between the dense inorganic binder and the test barrel and the pad. Then, the sample is pressed down by the reaction frame.

[0018] The beneficial effects of this invention compared to the prior art are as follows:

[0019] 1. This invention allows for easy lifting of the test mold using a two-hand lifting operation. The tray can be carried by a single tester, meeting the requirements for on-site reaction frame manufacturing. It has a small working area, is simple and easy to operate, and ensures extremely high personnel safety.

[0020] 2. This invention employs a rotating eccentric cylindrical holder that rotates to the support position during loading, elevating the test barrel and exposing the bottom of the lower pad. After loading, the holder is rotated to an unsupported position, ensuring the reaction frame compacts the specimen without being affected by the supporting holder. This eccentric cylindrical holder is simpler to operate and more stable than traditional methods of raising the specimen. Furthermore, the holder surface is flat, and the height of both sides is consistent, resulting in a denser and flatter loading process, thus improving the quality of the loading.

[0021] 3. The present invention adopts a lower pad inlay structure, which allows the pad to be inlaid on the tray surface through a tray tool, thereby playing a stabilizing role and preventing the specimen from being made out of standard size due to pad displacement or other reasons. It also provides good protection for personnel safety. Attached Figure Description

[0022] Figure 1 This is a front view of the auxiliary tray device described in this invention;

[0023] Figure 2 A cross-sectional view of the auxiliary tray device of the present invention, showing the placement of the test bucket and pad block;

[0024] Figure 3 A cross-sectional view showing the eccentric cylindrical pin of the auxiliary pallet tool rotating to the bottom of the test bucket;

[0025] Figure 4 Rotate the eccentric cylindrical pin of the auxiliary pallet tool to obtain a cross-sectional view of the bottom of the test bucket;

[0026] In the diagram: 1-base; 2-test bucket; 3-pad; 4-groove; 5-seat; 6-handle; 501-fixing pin; 502-eccentric cylindrical pin; 503-handle. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0028] See Figures 1-4 This embodiment proposes an auxiliary tray device for preparing inorganic binder specimens, including a base 1, which is a cylindrical steel plate with a flat disc design. The upper surface of the base 1 is used to place the test barrel 2 and the pad 3; the upper surface of the base 1 is provided with a circular groove 4 for placing the pad 3, and the groove 4 matches the structure of the bottom of the pad 3 so that the pad 3 is perfectly embedded in the groove 4. The outer diameter of the pad 3 matches the inner diameter of the test barrel 2 so that the pad 3 is embedded in the test barrel 2; in this embodiment, the dimensions of the test barrel 2 used for preparing the cylindrical inorganic binder specimen are Φ150X230X13.5mm, and the diameter of the test barrel 2 is Φ150mm; the inner diameter of the pad 3 is Φ133.5mm, the bottom of the pad 3 is a concave central circle with an inner diameter of Φ44.5mm; the height of the pad 3 is 40mm, and when loading the material, the bottom of the test barrel 2 needs to be raised so that about 20mm of the bottom of the pad 3 is exposed. This tray tool uses a clamping mechanism to support test bucket 2. Specifically:

[0029] Two retaining seats 5 are provided on the upper surface of the base 1, symmetrically arranged on opposite sides of the groove 4. Each retaining seat 5 includes a fixed shaft 501 and an eccentric cylindrical pin 502. The fixed pin 501 is cylindrical, and its lower surface is welded to the upper surface of the base 1. The eccentric cylindrical pin 502 is rotatably connected to the fixed shaft 501 and can rotate around it. The upper surfaces of the fixed shaft 501 and the eccentric cylindrical pin 502 are flush, allowing the test barrel 2 to be horizontally supported. When the larger circular side of the eccentric cylindrical pin 502 rotates to near the groove 4, it is located at the bottom of the test barrel 2, and when the two retaining seats 5 rotate to the support position, their inner edges are tangent to the outer edge of the groove 4. When the smaller circular side of the eccentric cylindrical pin 502 rotates to near the groove 4, it is located outside the test barrel 2. A handle 503 is connected to the eccentric cylindrical pin 502 for convenient rotation.

[0030] Two handles 6 are symmetrically arranged on the upper edge of the base 1. The handles 6 are made of HPB300 round steel with a diameter of 10mm. The handles 6 are welded to the base 1 by arc welding, which allows the base 1 to be lifted and moved as a whole. The weight of the test barrel 2 and the upper and lower pads is about 17kg. The weight of the specimen after molding and meeting the compaction requirements is about 6.5Kg-8.0Kg.

[0031] The method of using the auxiliary tray tool described in this embodiment is as follows:

[0032] During the manufacturing process, first, place the pad 3 into the groove 4 on the base 1. Rotate the eccentric cylindrical pins 502 of the two card holders 5 to the support position via the handle 503, i.e., tangent to the outer edge of the groove 4. Then, place the test barrel 2 over the pad 3 and onto the card holders 5. The height of the card holders 5 on both sides is 30mm, raising the test barrel 2 and making the pad 3 protrude 30mm. This increases the volume inside the test barrel 2. Then, the inorganic binder is filled into the test barrel 2 by tamping. After that, place the upper pad on top of the test barrel 2. Use the handle 6 to place the tray tool, along with the test barrel 2 and the pad 3, onto the reaction frame. Then, rotate the eccentric cylindrical pins 502 of the card holders 5 out of the support position. Due to the tamping method used for filling, the friction between the dense inorganic binder inside and the test barrel 2 and the pad 3 prevents the test barrel 2 from falling. Then, the reaction frame applies force to press down on the test piece for manufacturing. The eccentric cylindrical clamp, which rotates to the support position during loading, exposes the bottom of the lower pad. After loading, the clamp is rotated to the unsupported position, ensuring that the reaction frame does not affect the compaction of the specimen. This eccentric cylindrical clamp is simpler to operate and more stable than traditional shim methods. Furthermore, the clamp surface is flat, and the clamp heights on both sides are consistent, resulting in a denser and flatter loading process and improving the quality of loading.

[0033] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all of these should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. An auxiliary tray device for preparing inorganic binder specimens, characterized in that, The system includes a base (1), the upper surface of which is used to place a test barrel (2) and a pad (3); the outer diameter of the pad (3) matches the inner diameter of the test barrel (2) so that the pad (3) is embedded in the test barrel (2); the upper surface of the base (1) is provided with a groove (4) for placing the pad (3), and the upper surface of the base (1) is provided with at least two retainers (5), which are evenly distributed around the groove (4); each retainer (5) includes a fixed shaft (501) and an eccentric cylindrical pin (502), which is rotatably connected to the fixed shaft. On (501), the upper surfaces of the fixed shaft (501) and the eccentric cylindrical pin (502) are flush; when the large circle side of the eccentric cylindrical pin (502) is rotated to the bottom of the test barrel (2) near the groove (4), it is used to raise the bottom of the test barrel (2), and at the same time the bottom of the pad (3) is exposed, so that the filling space inside the test barrel (2) is increased; after the filling is completed, the small circle side of the eccentric cylindrical pin (502) is rotated to the groove (4), so that the card seat (5) is located outside the test barrel (2), and at this time the inorganic binder in the test barrel (2) is pressed to make the test piece by the reaction frame.

2. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, The groove (4) matches the structure of the bottom of the pad (3), so that the pad (3) is embedded in the groove (4).

3. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, The upper surface of the base (1) is provided with two card holders (5), which are symmetrically arranged on opposite sides of the groove (4).

4. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, The fixed shaft (501) is a cylindrical structure, and the lower surface of the fixed shaft (501) is fixedly connected to the upper surface of the base (1).

5. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, A handle (503) for rotating the eccentric cylindrical pin (502) is connected to the eccentric cylindrical pin (502).

6. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, The base (1) has two handles (6) symmetrically arranged on the upper surface edge.

7. The auxiliary tray device for preparing inorganic binder specimens according to claim 6, characterized in that, The handle (6) is made of HPB300 round steel with a diameter of 10mm.

8. The auxiliary tray device for preparing inorganic binder specimens according to claim 1, characterized in that, The base (1) is a cylindrical steel plate.

9. A method for manufacturing an auxiliary tray device as described in any one of claims 1-8, characterized in that, Includes the following steps: 1) Place the pad (3) into the groove (4) on the base (1), rotate the eccentric cylindrical pin (502) of the card seat (5) to the support position, that is, tangent to the outer edge of the groove (4), then put the test bucket (2) on the pad (3) and place it on the card seat (5), raise the test bucket (2) and expose the bottom of the pad (3) to increase the volume inside the test bucket (2); 2) Then, the inorganic binder is loaded into the test barrel (2) by tamping. Then, an upper pad is placed on the top of the test barrel (2). The tray tool, along with the test barrel (2) and the pad (3), is placed on the reaction frame. Then, the eccentric cylindrical pin (502) of the card seat (5) is rotated out of the support position. Because the loading is done by tamping, the test barrel (2) will not fall due to the friction between the dense inorganic binder and the test barrel (2) and the pad (3). Then, the sample is pressed down by the reaction frame.

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