Concrete slump detection device

Abstract

The utility model relates to a concrete slump detection device which is arranged on a slump cone and comprises a limiting assembly, a tamping rod and a limiting nut, the limiting assembly is clamped at the position of a cone opening of the slump cone, and the limiting assembly comprises a limiting round cover and a limiting ring which are coaxially and fixedly connected inside and outside; a spiral through groove is formed in the top face of the round limiting cover, the lower end of the tamping rod penetrates through the spiral through groove and extends into the slump cone, the tamping rod conveniently moves along the spiral through groove, and the length of the tamping rod is larger than the height of the slump cone. Three sections of external threads are vertically arranged on the tamping rod at intervals, a limiting nut is further arranged on the tamping rod located above the limiting round cover, the limiting nut is sequentially connected with the three sections of external threads, and the limiting nut abuts against the top face of the limiting round cover downwards, so that the tamping rod is prevented from continuing to move downwards, and the insertion depth of the tamping rod is limited. According to the utility model, the cross section of each layer of concrete can be uniformly inserted and tamped, the inserting and tamping depth can be controlled, and the upper and lower adjacent layers of concrete can be fully combined.

Description

Technical Field

[0001] This utility model relates to the field of slump testing technology, and in particular to a concrete slump testing device. Background Technology

[0002] The slump cone is used to determine the slump of concrete. In practice, the prepared concrete sample is evenly placed into the slump cone in three layers, so that the height of each layer of concrete after compaction is about one-third of the height of the slump cone.

[0003] Each layer of concrete requires 25 tamping strokes with a tamping rod. It's important to note that tamping should be done in a spiral direction from the outside to the center, that is, from the edge of the slump cone towards the center. Each tamping stroke should be evenly distributed across the cross-section. Furthermore, when tamping the upper layer of concrete, the tamping rod should penetrate the current layer to a depth of approximately 20-30mm into the next layer to ensure sufficient tamping depth and adequate bonding between adjacent layers.

[0004] Due to variations in manual tamping, it may be difficult to uniformly tamp 25 times on each concrete layer. Furthermore, the tamping depth for the two layers other than the bottom layer is difficult to guarantee, and the insertion may be too shallow or too deep into the bottom layer, resulting in insufficient bonding between the upper and lower layers of concrete and affecting the accuracy of the slump test. Summary of the Invention

[0005] To address the problem of difficulty in controlling the depth of manual tamping, this invention provides a concrete slump testing device. A limiting component is added above the slump cylinder, and three external threads are provided on the tamping rod. Nuts are sequentially engaged with the external threads. When the tamping rod is inserted downwards, the nuts abut against the limiting component, thereby preventing the tamping rod from being inserted too deeply or too shallowly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A concrete slump testing device is arranged on a slump cylinder and includes a limiting component, a tamping rod, and a limiting nut. The limiting component is snapped into the opening of the slump cylinder, which improves the stability of the limiting component installation. The limiting component includes a limiting round cover and a limiting ring that are coaxially and fixedly connected inside and outside. The integrated structure has the characteristics of high strength.

[0008] The top surface of the limiting round cover is provided with a spiral groove, and the lower end of the tamping rod passes through the spiral groove and extends into the slump cylinder, so that the tamping rod can move along the spiral groove. The length of the tamping rod is greater than the height of the slump cylinder.

[0009] The tamping rod has three external threads spaced at intervals. The tamping rod located above the limiting cover is also provided with the limiting nut. The limiting nut is connected to the three external threads in sequence. The limiting nut abuts against the top surface of the limiting cover downwards, preventing the tamping rod from moving further down and limiting the insertion depth of the tamping rod.

[0010] Furthermore, the limiting cap is a circular cap with a diameter matching the diameter of the slump cone opening. The limiting cap is inserted downwards into the slump cone opening. This improves the stability of the limiting assembly's engagement and prevents horizontal movement of the limiting assembly.

[0011] Furthermore, the thickness of the limiting ring is less than the thickness of the limiting cover, and the diameter of the limiting ring is greater than the diameter of the slump cone opening. The opening of the slump cone abuts against the joint between the limiting ring and the limiting cover. This facilitates the support of the limiting assembly by the slump cone.

[0012] Furthermore, multiple stabilizing plates are provided circumferentially below the limiting ring. There is a gap between the stabilizing plates and the outer circumferential surface of the limiting cover, and the stabilizing plates abut against the outer wall of the slump cone. This improves the stability of the limiting assembly installation and prevents the limiting assembly from shaking.

[0013] Furthermore, the inner end of the spiral groove is located at the center of the limiting round cover, and the outer end of the spiral groove extends spirally to the edge of the limiting round cover, penetrating the top surface of the limiting round cover. This facilitates the tamping rod to penetrate the limiting round cover and move between the center and the edge of the limiting round cover.

[0014] Furthermore, the width of the spiral groove is greater than the diameter of the tamping rod, and a handle is fitted on the upper end of the tamping rod for easy handling. The limiting round cover is provided with multiple positioning lines, which are evenly arranged along the spiral groove.

[0015] Furthermore, the number of positioning lines is 25. Tamping is performed at each positioning line location to facilitate uniform tamping of each layer of concrete.

[0016] The beneficial effects of this utility model through the above technical solution are:

[0017] This utility model has a reasonable structural design. The limiting cap is inserted into the opening of the slump cone, and the opening of the cone abuts against the joint between the limiting ring and the limiting cap, which can ensure that the limiting component is stably locked at the opening of the slump cone. At the same time, with the support of the stabilizing plate, the reliability of the locking of the limiting component is ensured, and the limiting component is prevented from shaking.

[0018] The limiting round cover of this utility model has a spiral groove and 25 indicator lines, which are evenly arranged along the spiral groove. During the tamping process, the tamping rod is placed in the spiral groove and moves, and performs up and down tamping operations at each indicator line position. This ensures that each layer of concrete is tamped evenly 25 times, improving the uniformity of tamping.

[0019] The tamping rod of this invention has three external threads and a limiting nut, which is connected to the three external threads from top to bottom. During tamping, the limiting nut abuts against the limiting cap, which prevents the tamping rod from moving downward and controls the insertion depth, ensuring that the tamping rod can penetrate the current layer and reach a position about 20-30mm below the current layer. Attached Figure Description

[0020] Figure 1 This is the front view of the concrete slump testing device of this utility model.

[0021] Figure 2 This is a cross-sectional view of the concrete slump testing device of this utility model.

[0022] Figure 3 This is a schematic diagram of the spiral channel of the concrete slump testing device of this utility model.

[0023] Figure 4 This is a schematic diagram of the layered tamping process of the concrete slump testing device of this utility model.

[0024] The attached diagram is labeled as follows: 1 Slump cone, 2 Limiting assembly, 21 Limiting cover, 22 Limiting ring, 3 Tamping rod, 4 Limiting nut, 5 Stabilizing plate, 6 Spiral groove, 7 Handle sleeve, 8 Positioning line, 9 External thread. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, the concrete slump testing device is arranged on the slump cylinder 1. The testing device includes a limiting component 2, a tamping rod 3, and a limiting nut 4. The limiting component 2 is used to connect and install with the slump cylinder 1, and the limiting component 2 and the slump cylinder 1 are detachably connected. It can be removed after tamping without affecting other operations, such as... Figure 1 As shown.

[0027] The limiting component 2 is engaged at the opening of the slump cone 1 to prevent it from falling off. The limiting component 2 includes a limiting cover 21 and a limiting ring 22. The limiting cover 21 is a circular cover, and the limiting ring 22 is a circular ring. The thickness of the limiting ring 22 is less than the thickness of the limiting cover 21. The limiting cover 21 and the limiting ring 22 are coaxially and fixedly connected, thus the limiting component 2 is an integral structure with a certain structural strength.

[0028] When the limiting component 2 engages with the slump cylinder 1, the diameter of the limiting cap 21 is the same as the diameter of the opening of the slump cylinder 1, and the limiting cap 21 is inserted downwards into the opening of the slump cylinder 1. This prevents the limiting component 2 from moving radially. Simultaneously, the diameter of the limiting ring 22 is larger than the diameter of the opening of the slump cylinder 1, and the opening of the slump cylinder 1 abuts against the joint between the limiting ring 22 and the limiting cap 21, preventing the limiting component 2 from moving downwards. Thus, the slump cylinder 1 supports and bears the limiting component 2. Figure 2 As shown.

[0029] To improve the stability of the engagement between the limiting component 2 and the slump cylinder 1, at least three stabilizing plates 5 are provided circumferentially below the limiting ring 22. Each stabilizing plate 5 is a triangular plate arranged vertically. A gap exists between the stabilizing plate 5 and the outer circumferential surface of the limiting cover 21 to prevent interference. The cylinder opening faces upwards and abuts against the joint between the limiting ring 22 and the limiting cover 21. The stabilizing plate 5 abuts against the outer wall of the slump cylinder 1 to prevent the limiting component 2 from shaking, thus ensuring the reliability of the installation of the limiting component 2.

[0030] To facilitate the insertion of the tamping rod 3 into the slump cylinder 1, a spiral groove 6 is formed on the top surface of the limiting cover 21, penetrating the top surface of the limiting cover 21. Specifically, the inner end of the spiral groove 6 is located at the center of the limiting cover 21, and the outer end of the spiral groove 6 extends spirally to the edge of the limiting cover 21, such as... Figure 3 As shown.

[0031] The tamping rod 3 is fitted with a handle 7 at its upper end for easy manual gripping and tamping. The lower end of the tamping rod 3 extends through the spiral groove 6 into the slump cylinder 1, and the length of the tamping rod 3 is greater than the height of the slump cylinder 1. The width of the spiral groove 6 is slightly larger than the diameter of the tamping rod 3, allowing the tamping rod 3 to slide up and down relative to the spiral groove 6. Simultaneously, the tamping rod 3 can move along the curvature of the spiral groove 6, resulting in a spiral trajectory for the tamping rod 3, which conforms to the requirement that "tamping should be performed spirally from the outside to the center of the slump cylinder 1."

[0032] To ensure that the tamping rod can be tamped evenly 25 times on each concrete section, multiple positioning lines 8 are provided on the limiting round cover 21, with a total of 25 positioning lines 8. The 25 positioning lines 8 are evenly arranged along the spiral groove 6. In this way, the tamping rod 3 can be tamped once each time it moves to the position of a positioning line 8, thereby achieving the requirement of 25 even tamping times.

[0033] The concrete is poured into the slump cone 1 in layers, and the tamping depth of each layer of concrete has certain requirements. In order to avoid tamping too deep or too shallow, three external threads 9 are provided at intervals on the top and bottom of the tamping rod 3. A limiting nut 4 is also provided on the tamping rod 3 located above the limiting cover 21. The limiting nut 4 is connected to the three external threads 9 from top to bottom. The limiting nut 4 abuts against the top surface of the limiting cover 21 to prevent the tamping rod 3 from moving downward.

[0034] The principle of this utility model is as follows: Figure 4 As shown in Figure a, when the first layer of concrete is filled into the slump cylinder 1 and tamping is required, the limiting component 2 is snapped into the opening of the slump cylinder 1 and kept fixed. Then, the limiting nut 4 is connected to the external thread 9 on the upper part of the tamping rod 3. Then, the tamping rod 3 is inserted into the slump cylinder 1 through the spiral groove 6. At this time, the length of the tamping rod 3 inside the slump cylinder 1 is the longest and can be tamped to the bottom of the slump cylinder 1.

[0035] Manually holding the handle 7 along the spiral groove 6 and guided by the positioning line 8, the first layer of concrete can be tamped evenly 25 times. After tamping, the limiting component 2 and the tamping rod 3 can be removed. During the tamping process, the limiting component 2 can be supported with one hand to ensure its stability and prevent shaking.

[0036] like Figure 4 As shown in Figure b, when the second layer of concrete is poured into the slump cone 1 and tamping is required, the tamping steps are the same as described above. The difference is that the limiting nut 4 is connected to the external thread 9 in the middle of the tamping rod 3. At this time, the length of the tamping rod 3 inside the slump cone 1 is moderate, and the tamping rod 3 can penetrate through the second layer and reach a position of about 25mm into the first layer.

[0037] like Figure 4 As shown in Figure c, when the third layer of concrete is poured into the slump cone 1 and tamping is required, the tamping steps are the same as described above. The difference is that the limiting nut 4 is connected to the external thread 9 at the bottom of the tamping rod 3. At this time, the length of the tamping rod 3 inside the slump cone 1 is the shortest. The tamping rod 3 can penetrate through the third layer and reach about 25mm into the second layer, thus ensuring the reliability of the bond between each two layers of concrete.

[0038] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A concrete slump testing device, arranged on a slump cylinder (1), characterized in that, It includes a limiting component (2), a tamping rod (3) and a limiting nut (4). The limiting component (2) is snapped into the opening of the slump cylinder (1). The limiting component (2) includes a limiting round cover (21) and a limiting ring (22) that are coaxially and fixedly connected inside and outside. The top surface of the limiting round cover (21) is provided with a spiral through groove (6), and the lower end of the tamping rod (3) extends through the spiral through groove (6) into the slump cylinder (1). The length of the tamping rod (3) is greater than the height of the slump cylinder (1). The tamping rod (3) is provided with three external threads (9) spaced apart vertically. The tamping rod (3) located above the limiting round cover (21) is also provided with the limiting nut (4). The limiting nut (4) is connected to the three external threads (9) in sequence, and the limiting nut (4) abuts against the top surface of the limiting round cover (21) downwards.

2. The concrete slump testing device according to claim 1, characterized in that, The limiting round cover (21) is a circular cover body. The diameter of the limiting round cover (21) is the same as the diameter of the slump cylinder (1). The limiting round cover (21) is inserted downward into the slump cylinder (1).

3. The concrete slump testing device according to claim 2, characterized in that, The thickness of the limiting ring (22) is less than the thickness of the limiting cover (21), the diameter of the limiting ring (22) is greater than the diameter of the slump cylinder (1), and the opening of the slump cylinder (1) abuts against the joint of the limiting ring (22) and the limiting cover (21).

4. The concrete slump testing device according to claim 2, characterized in that, Multiple stabilizing plates (5) are provided circumferentially below the limiting ring (22). There is a gap between the stabilizing plate (5) and the outer ring surface of the limiting round cover (21). The stabilizing plate (5) abuts against the outer wall of the slump cylinder (1).

5. The concrete slump testing device according to claim 1, characterized in that, The inner end of the spiral groove (6) is located at the center of the limiting round cover (21), and the outer end of the spiral groove (6) extends spirally to the edge of the limiting round cover (21). The spiral groove (6) penetrates the top surface of the limiting round cover (21).

6. The concrete slump testing device according to claim 1, characterized in that, The width of the spiral groove (6) is greater than the diameter of the tamping rod (3). The upper end of the tamping rod (3) is also fitted with a handle (7). The limiting round cover (21) is provided with multiple positioning lines (8). The multiple positioning lines (8) are evenly arranged along the spiral groove (6).

7. The concrete slump testing device according to claim 6, characterized in that, The number of positioning lines (8) is 25.

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