A compactness substrate

Abstract

The utility model relates to road engineering technical field discloses a kind of compactness base plate, to solve the problem of existing square compactness base plate cleaning dead angle difficult, base plate local maintenance replacement difficult. Including diversion hook plate and rotary connecting piece;Diversion hook plate is the plate structure along the length direction of side plate extension, with the length of side plate compatible, the upper surface of the side close to sampling hole is smooth inclined diversion surface, the side far from sampling hole is the flat butt joint end matched with the outer side wall of side plate;Rotary connecting piece is located at flat butt joint end terminal, for rotatingly connecting diversion hook plate on side plate.The utility model can eliminate base plate cleaning dead angle and diversion hook plate replacement is convenient, can guarantee positioning stability, simplify operation and ensure enclosed sealing, effectively improve compactness detection data reliability and detection efficiency, especially suitable for road engineering sand filling method compactness detection scene.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, and in particular to a compaction substrate. Background Technology

[0002] Compaction degree is an important indicator for evaluating the compaction quality of road construction materials such as subgrade and pavement. When using the sand cone method to test compaction degree, a compaction plate is used as an auxiliary tool to fix it on the surface of the pavement to be tested, forming a test hole of standard size so that standard sand can be poured in and a sample can be collected. Figure 1 This is a schematic diagram of the structure of a common compaction substrate in the prior art. The base plate is usually square and serves to support and stabilize the substrate. Four side plates surround the base plate to prevent sand from falling and ensure accurate testing. A circular sampling hole is opened in the center of the base plate to form a standard test hole, which facilitates sand filling and sample collection for compaction testing.

[0003] In practical applications, the traditional compaction substrate structure often creates cleaning dead zones in the four corners, making it difficult to completely remove sample or standard sand residue. Incomplete sample collection directly affects the accuracy of weighing data, thus negatively impacting the reliability of compaction test results. Furthermore, standard sand residue not only wastes materials but also adds time to the cleaning process, reducing overall testing efficiency and increasing time and labor costs, hindering cost control in the testing process.

[0004] To overcome the above defects, existing technologies solve the problem in the following ways: First, the square base plate is changed to a circle to eliminate the four corner areas. For example, Chinese utility model CN202323333358.X discloses a base plate for compaction testing using the sand filling method. The base plate body is circular, which eliminates the four dead corners for cleaning from the structure and avoids the residue of samples and standard sand in the corners. Second, a detachable side plate design is adopted. For example, CN202420202895.6 discloses a new type of base plate for compaction testing. It designs a quick positioning fixture that can be detachably connected to the base plate body. The side plate and positioning component can be flexibly disassembled and assembled through structures such as movable handles and connecting rods.

[0005] The above methods still have the following drawbacks: Although the circular base plate eliminates the four dead corners, compared with the traditional square base plate, the coverage of the road surface and the positioning stability are reduced. It is more prone to displacement when affected by excavation tools and other operations, resulting in deviations in the shape of the sampling holes. Most existing compaction base plates are integral structures. When a part of the base plate, such as the side plate, is damaged, due to the tight connection between the components and the lack of a targeted quick disassembly and assembly structure, the entire base plate often needs to be operated during maintenance. Not only is it difficult to accurately locate and disassemble the damaged component, but it is also difficult to quickly restore the stability and sealing of the original structure of the base plate after replacing the new component, resulting in a cumbersome and time-consuming maintenance process. Existing detachable side plate solutions achieve cleaning through disassembly and separation, but after frequent disassembly and assembly, the connection between the side plate and the base plate, and between the side plate and positioning components such as clamps and connecting rods, is prone to loosening or wear, making it impossible to maintain the initial tight fit. This will increase the gap between the side plate and the base plate, and sand particles will leak from the gap during sand filling testing. Utility Model Content

[0006] The purpose of this invention is to solve the problems of difficult cleaning of dead corners and difficulty in partial repair and replacement of square compaction substrates in the prior art. It proposes a compaction substrate that ensures cleaning, positioning and sealing effects at the same time, and is especially suitable for compaction testing scenarios using the sand filling method in road engineering.

[0007] To achieve the above objectives, this application proposes the following technical solution:

[0008] A compaction substrate includes a substrate body, which is composed of a square base plate and side plates. The base plate is provided with side plates for enclosure on its four sides and a sampling hole is provided on the base plate. It also includes a flow guide hook plate and a rotating connector.

[0009] The flow guide hook plate is a plate-shaped structure symmetrically arranged with the sampling hole axis as the center. It extends along the length direction of the side plate and is adapted to the side plate. The end near the bottom plate is attached to the upper edge of the upper surface of the bottom plate. The upper surface of the flow guide hook plate near the sampling hole is a flow guide surface inclined towards the axis of the sampling hole, and the side away from the sampling hole is a straight butt end that matches the outer wall of the side plate.

[0010] The rotating connector is located at the end of the straight butt joint and is used to rotatably connect the flow guide hook plate to the side plate. The flow guide hook plate and the rotating connector are detachably connected.

[0011] Specifically, the hook-shaped structure and smooth guiding surface of the guide plate guide the sample and standard sand to converge towards the central sampling hole, avoiding residue at the four corners of the substrate. This fundamentally solves the problems of difficult cleaning and incomplete sample collection associated with traditional square substrates, ensuring accurate weighing data and improving the reliability of compaction test results. Compared to a circular base plate, retaining the square base plate structure ensures coverage of the road surface and positioning stability, preventing displacement due to operational factors. The rotating connector allows for flexible rotation of the guide plate without disassembling the side plates, avoiding the defects of loose connections and poor sealing of detachable side plates, reducing operational steps, and improving testing efficiency.

[0012] Specifically, the rotating connector replaces disassembly and separation through rotation, eliminating the need to separate the side plate from the bottom plate. On one hand, the rotating connector maintains the fixed connection between the side plate and the bottom plate, preventing loosening of the side plate due to disassembly and ensuring that the gap between the side plate and the bottom plate and the guide hook plate is ≤2.5mm during sand filling, preventing sand leakage and ensuring the accuracy of test data. On the other hand, it retains the complete structure of the square bottom plate and, combined with the anti-slip device, further improves the overall positioning stability of the substrate, preventing substrate displacement due to external forces such as collisions with excavating tools during the testing process, and ensuring that the sampling hole always maintains the standard size.

[0013] Specifically, the rotating connector is L-shaped and includes a fixing component and a rotating component. The rotating component is a shaft or hinge, located at one end of the rotating connector, for rotatably connecting with the side plate. The fixing component is a bolt, located at the other end of the rotating connector, for detachably connecting with the flow guide plate. Furthermore, the L-shaped structure, combined with the rotating component (shaft or hinge) and the fixing component (bolt), ensures reliable rotation of the flow guide plate while maintaining the firmness of the connection, preventing loosening or wear after frequent operation, ensuring sealing during sand filling, and solving the problem of poor sealing of the detachable side plate. In addition, the bolt, as a fixing component, allows for detachable connection between the flow guide plate and the rotating connector. When the flow guide plate or connector is damaged, it can be disassembled and replaced individually without replacing the entire base plate, reducing maintenance costs and simplifying disassembly and assembly operations, thus reducing time consumption.

[0014] Specifically, the compaction substrate also includes an anti-slip device, which is either a long strip of anti-slip texture on the contact surface between the guide hook plate and the base plate, or raised particles or anchoring nails on the lower surface of the base plate. Furthermore, the anti-slip texture on the contact surface between the guide hook plate and the base plate, or the raised particles or anchoring nails on the lower surface of the base plate, can increase the friction between the substrate and the road surface, and between the guide hook plate and the base plate, preventing the substrate from shifting due to external forces such as excavation tool operation during the testing process. This solves the problem of traditional substrates, especially circular base plates, being prone to displacement, leading to deviations in the shape of the sampling holes. In addition, by preventing substrate displacement, it ensures that the sampling holes always maintain standard dimensions, avoiding the impact of hole shape deviations on sand filling volume and sample collection, further improving the accuracy of compaction test data and reducing result deviations caused by operational errors.

[0015] Specifically, four flow guide hooks are provided, each corresponding to one of the four side plates. Furthermore, the four flow guide hooks, each corresponding to one of the four side plates, cover the four corner areas of the substrate, ensuring that the sample and standard sand can converge from each edge of the substrate to the sampling hole through the flow guide surface, thoroughly eliminating cleaning dead zones. Compared to locally placed flow guide hooks, this results in more thorough cleaning and more complete sample collection. Simultaneously, the four flow guide hooks, symmetrically arranged around the sampling hole axis, ensure uniform force distribution on the substrate, preventing instability due to localized structural imbalances, further improving substrate positioning stability and reducing the risk of displacement during testing.

[0016] Specifically, the tilt angle of the guide surface is between 10° and 30°. Furthermore, this 10° to 30° tilt angle design ensures that the sample and standard sand slide smoothly into the sampling hole under their own gravity, avoiding accumulation due to an excessively small angle and splashing due to excessively large angles. It also reduces residue and improves cleaning efficiency. In addition, this angle range avoids the problem of the guide hook plate structure being too weak and easily damaged due to an excessively large angle, or the guide function failing due to an excessively small angle. While ensuring the guide effect, it extends the service life of the substrate and reduces the risk of damage during use.

[0017] Beneficial effects

[0018] As can be seen from the above technical solutions, the present invention provides a compaction substrate, which has the following advantages compared with the prior art:

[0019] 1. Regarding the cleaning effect on residual samples and standard sand, traditional square substrates have dead corners, resulting in sample residue affecting the accuracy of detection; circular substrates eliminate dead corners but sacrifice stability; detachable side plates are prone to reduced sealing due to disassembly and reassembly. This utility model adopts a structural design of inverted hook-shaped guide plates combined with smooth guide surfaces, which can guide the sample and standard sand to converge towards the central sampling hole, completely eliminating residue in the four corners. At the same time, it does not require disassembly of the side plates, balancing thorough cleaning with sealing performance, ensuring reliable test data.

[0020] 2. Regarding coverage, positioning effect, and stability, traditional circular substrates have a small coverage area and are easily displaced by external forces, leading to deviations in the shape of the sampling holes. While traditional square substrates offer a wide coverage area, the lack of anti-slip design still poses a risk of displacement. This invention employs a structural design combining a square base plate with an anti-slip device. This design retains the large coverage area of ​​the road surface while increasing friction through anti-slip textures, raised particles, or anchoring nails. This prevents substrate displacement during testing, ensuring that the sampling holes always maintain standard dimensions and improving positioning stability.

[0021] 3. In terms of operability, traditional detachable side panels require frequent disassembly and assembly, involve complex operating procedures, and are prone to wear and loosening at the connection points; some improved solutions have complex structures and are difficult to master. This utility model adopts a structural design with a rotating connector combined with bolts for detachable fixing. The flow guide hook plate can rotate directly around the side panel without the need to disassemble the entire side panel, simplifying the operation steps; at the same time, the bolts, as fixing components, enable detachable connection between the flow guide hook plate and the rotating connector. When the flow guide hook plate or connector is damaged, it can be disassembled and replaced individually without replacing the entire base plate, reducing maintenance costs and simplifying disassembly and assembly operations, thus reducing time loss. Attached Figure Description

[0022] The accompanying drawings are not drawn to scale according to a true reference numeral. In the drawings, each identical or nearly identical component shown in the various figures can be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a common compaction substrate in the prior art;

[0024] Figure 2 This is a three-dimensional schematic diagram of a compaction substrate disclosed in this utility model;

[0025] Figure 3 This is a top view of a compaction substrate disclosed in this utility model;

[0026] Figure 4 This is a longitudinal sectional view of the guide hook plate of this utility model in the closed state;

[0027] Figure 5 This is a longitudinal sectional view of the guide hook plate of this utility model in the open state;

[0028] Figure 6 This is a partial view of the connection between the flow guide hook plate and the side plate of this utility model.

[0029] The specific meanings of each mark in the diagram are as follows:

[0030] 1-Substrate body, 2-Bottom plate, 3-Side plate, 4-Sampling hole, 5-Flow guide hook plate, 6-Rotating connector, 7-Anti-slip device, 8-Fixing component, 9-Rotating component, 10-Flow guide surface, 11-Straight docking end. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0032] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" mean that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] The following is in conjunction with the appendix Figure 2-6 The specific structure of the embodiment shown will be further described in detail below, and a compaction substrate disclosed in this utility model will be provided in more detail.

[0034] Figure 2 This is a three-dimensional schematic diagram of a compaction substrate disclosed in this utility model. Figure 3 This is a top view of a compaction substrate disclosed in this utility model.

[0035] like Figure 2As shown, the compaction substrate provided in this embodiment includes a flow guide hook plate 5 and a rotating connector 6. There are four flow guide hook plates 5, which are respectively arranged in a one-to-one correspondence with the four side plates 3 and are symmetrically distributed with the axis of the sampling hole 4 as the center. The included angle between adjacent flow guide hook plates 5 is 90° to ensure that the substrate is subjected to uniform force and to avoid tilting due to structural imbalance during placement.

[0036] like Figure 3 As shown, the guide hook plate 5 is a long strip-shaped plate structure with a length that matches the length of the side plate 3, both being 280mm, with a width of 40mm and a thickness of 3mm. It is made of the same Q235 steel plate as the bottom plate 2.

[0037] The substrate body 1 also includes an anti-slip device 7, which in this embodiment adopts two combination methods:

[0038] Long strip anti-slip patterns are provided on the contact surface between the flow guide hook plate 5 and the base plate 2. The anti-slip patterns are horizontally arranged sawtooth structures with a tooth height of 1mm and a tooth pitch of 3mm, which increases the friction between the flow guide hook plate 5 and the base plate 2 and prevents the flow guide hook plate 5 from shifting due to vibration in the closed state.

[0039] On the lower surface of the base plate 2, the side in contact with the road surface is evenly distributed with raised particles. The raised particles are 2mm in diameter, 1.5mm in height, and 5mm apart. This can enhance the adhesion between the base plate 2 and the road surface, prevent the base plate from shifting due to the collision of the excavation tool during the testing process, and ensure that the sampling hole 4 always maintains the standard circular size of 150mm in diameter, so as to avoid the deformation of the hole affecting the accuracy of the sand filling volume.

[0040] Figure 4 This is a longitudinal sectional view of the guide hook plate of this utility model in the closed state. Figure 5 This is a longitudinal sectional view of the guide hook plate of this utility model in the open state.

[0041] like Figure 4 and Figure 5 The longitudinal sectional view of the flow guide hook plate shown shows that the cross-section of the flow guide hook plate 5 is hook-shaped, as... Figure 4 , Figure 5 As shown in the longitudinal sectional view, the vertical section of the hook-shaped structure has a height of 20mm and a horizontal section length of 15mm, which ensures both structural strength and fits the outer wall of side panel 3.

[0042] The upper surface of the guide plate 5 near the sampling hole 4 is a smooth inclined guide surface 10 with an inclination angle of 20°. The guide surface 10 is polished to achieve a roughness Ra≤0.8μm, reducing the friction between the sample and the guide surface. The side away from the sampling hole 4 is a straight butt end 11 with a length of 10mm. Its surface is not completely attached to the outer wall of the side plate 3 with a gap ≤2.5mm to ensure that no sand particles leak out from the gap during sand filling.

[0043] The working mode of the compaction substrate provided in this embodiment is as follows: (e.g.) Figure 4 The diagram shows a cross-sectional view of the guide hook plate in its closed state. During the testing process, the guide hook plate 5 is in a closed state, with the straight butt joint end 11 tightly fitted against the outer wall of the side plate 3. The guide surface 10 is inclined from the side plate 3 towards the sampling hole 4. At this time, after the sample and standard sand fall onto the guide surface, they will naturally slide down the guide surface 10 to the sampling hole 4, avoiding accumulation at the four corners of the base plate 2. Figure 5 The diagram shows the cross-sectional view of the guide hook plate in the open state. After the test is completed, the guide hook plate 5 can be rotated around the rotating connector 6. The maximum rotation angle can reach 120°. At this time, the four corners of the base plate 2 are fully exposed, which makes it easy to thoroughly clean the small amount of residual sample without disassembling the side plate 3.

[0044] Figure 6 This is a partial view of the connection between the flow guide hook plate and the side plate of this utility model.

[0045] like Figure 6 As shown, the rotating connector 6 has an L-shaped structure and can be made of 304 stainless steel. This material is rust-resistant and suitable for the outdoor environment of road inspection. Other rust-resistant materials are also under consideration. The rotating connector 6 includes a fixing part 8 and a rotating part 9.

[0046] The rotating component 9 is a hinge, or a pivot can be used; one side of the hinge is fixed to the top of the outer wall of the side plate 3 by welding, 10mm away from the top of the side plate 3, and the other side is fixedly connected to the end of the longitudinal section of the L-shaped rotating connector 6. The pivot of the hinge is set horizontally to ensure that the guide hook plate 5 can rotate up and down around the pivot.

[0047] The fixing component 8 is an M6 hexagon socket bolt. The bolt passes through the transverse section of the L-shaped rotating connector 6 and is threadedly connected to the straight butt end of the flow guide hook plate 5. The flow guide hook plate 5 has a pre-set threaded hole with a diameter matching the bolt. After the bolt is tightened, the flow guide hook plate 5 and the rotating connector 6 are firmly fixed to prevent loosening during the testing process. When the flow guide hook plate 5 or the rotating connector 6 is damaged, the bolt can be unscrewed to replace the component separately, without having to replace the entire base plate, thus reducing maintenance costs.

[0048] This embodiment, through the specific dimensions and structural design described above, fully implements the technical features defined in the prior art claims, and can effectively solve the problems of dead corners in cleaning and difficult maintenance of existing substrates, as detailed below:

[0049] In terms of cleaning effect, the guide surface of the guide hook plate 5 guides the sample to converge, and with the rotatable opening design, it completely eliminates the cleaning dead corners of the four corners of the base plate 2, and the residual amount is greatly reduced compared with the traditional square base plate.

[0050] In terms of stability, the coverage of the square base plate 2 is 30% greater than that of the circular base plate, and the anti-slip device 7 keeps the displacement of the base plate within 1mm, which is much lower than the 5mm displacement of the traditional base plate.

[0051] In terms of operability, when the flow guide plate 5 is damaged, there is no need to replace the entire substrate body 1. Only the damaged flow guide plate 5 needs to be replaced, which reduces material waste and lowers maintenance costs. Moreover, the replacement process does not require disassembling the side plate 3, simplifying the operation steps. Each replacement takes about 3-8 minutes, avoiding long-term interruptions in testing work due to substrate repair.

[0052] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A compaction substrate, comprising a substrate body (1), the substrate body (1) being composed of a square base plate (2) and side plates (3), wherein the base plate (2) is provided with side plates (3) perpendicularly around its perimeter for enclosure, and the base plate (2) is provided with sampling holes (4), characterized in that, It also includes a flow guide plate (5) and a rotating connector (6); The flow guide hook plate (5) is a plate-shaped structure symmetrically arranged with the axis of the sampling hole (4) as the center. It extends along the length direction of the side plate (3) and is adapted to the side plate (3). The end near the bottom plate (2) is attached to the edge of the upper surface of the bottom plate (2). The upper surface of the flow guide hook plate (5) near the sampling hole (4) is a flow guide surface (10) inclined towards the axis of the sampling hole (4), and the side away from the sampling hole (4) is a straight butt end (11) that matches the outer wall of the side plate (3). The rotating connector (6) is located at the end of the straight docking end (11) and is used to rotatably connect the flow guide hook plate (5) to the side plate (3), and the flow guide hook plate (5) and the rotating connector (6) are detachably connected.

2. The compaction substrate according to claim 1, characterized in that: The rotating connector (6) is L-shaped and includes a fixing part (8) and a rotating part (9); wherein the rotating part (9) is located at the end of the rotating connector (6) and is used to rotatably connect with the side plate (3); the fixing part (8) is located at the other end of the rotating connector (6) and is used to detachably connect with the guide hook plate (5).

3. The compaction substrate according to claim 1, characterized in that: The compaction substrate also includes an anti-slip device (7), which is located on the contact surface between the guide hook plate (5) and the base plate (2) or on the lower surface of the base plate (2).

4. A compaction substrate according to claim 1, characterized in that: The number of the flow guide hooks (5) is four, which are respectively set one-to-one with the four side plates (3).

5. A compaction substrate according to claim 1, characterized in that: The inclination angle of the guide surface (10) is 10° to 30°.

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