Road concrete slump detection device
By using a dual-head laser emitter and a light shield in the concrete slump testing device, the problem of inaccurate readings in traditional testing has been solved, and accurate testing under different lighting conditions has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-03
- Publication Date
- 2026-03-06
AI Technical Summary
In traditional concrete slump testing, inaccurate readings are caused by human eye deviation and poor lighting conditions, especially in dim or bright light where it is difficult to discern the scale on the metal ruler.
It employs a dual-head laser emitter, with one laser head pointing to the highest point of the concrete and the other laser head forming an indicator light spot on the scale. Combined with the sliding guide rail scale assembly and the light shield, it ensures accurate and clear readings.
It enables simple and accurate concrete slump detection under various lighting conditions, avoiding the influence of human eye parallax and laser scattering on the readings.
Smart Images
Figure CN223977237U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering testing equipment technology, specifically a road concrete slump testing device. Background Technology
[0002] The concrete slump test is the most basic and important field testing method for evaluating the workability (flowability, cohesiveness, and water retention) of concrete mixtures. According to current national standards (such as GB / T 50080-2016 "Standard for Test Methods of Performance of Ordinary Concrete Mixtures"), the traditional slump test procedure is usually as follows: pour concrete into a standard slump cone, tamp it down to ensure compaction, then lift the cone vertically. After the concrete mixture stops settling, measure the height difference between the height of the cone and the highest point of the slumped concrete specimen.
[0003] Traditional steel ruler measurements rely on visual estimation. Since the measuring point (the highest point of the concrete) is usually located at the center of the slump cone, while the ruler is at the edge, the human eye's line of sight is often skewed (parallax), leading to readings that are either too high or too low. Furthermore, in dimly lit construction sites or under strong light, the tiny markings on the metal ruler are difficult to discern. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a road concrete slump detection device, which solves the existing technical problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A road concrete slump testing device includes a benchmark tamping rod, a slump cylinder assembly, a sliding guide rail scale assembly, and a laser detection assembly;
[0007] The slump cylinder assembly includes a slump cylinder body, handles on both sides of the body, a foot plate at the bottom of the body, and a detachable loading funnel at the top of the body.
[0008] The sliding guide rail scale assembly is fixedly installed on the side wall of the slump cylinder body, including a ruler and a sliding guide rail. The ruler has a scale surface perpendicular to the bottom surface of the body, and scale lines are provided on the scale surface.
[0009] The laser detection component is slidably mounted on the sliding guide rail; the laser detection component includes a mounting base and a laser emitter mounted on the mounting base;
[0010] The laser emitter is a dual-head laser emitter, which includes a first laser head and a second laser head. The first laser head is used to point to the target position of the concrete to be tested, and the second laser head is used to point to the scale surface and form an indicator light spot on the scale line.
[0011] Preferably, the ruler body has a triangular cross-section, with one side attached to the inclined outer wall of the slump cylinder body, and the other side forming a scale reference surface perpendicular to the bottom surface; the sliding guide rail is arranged vertically on the edge or side of the ruler body.
[0012] Preferably, a horizontal straight cylinder is fixed to the mounting base for accommodating the laser emitter; the inner wall of the cylinder is lined with a silicone layer, and an elastic slit is provided on the side of the cylinder.
[0013] Preferably, a positioning mechanism is provided between the mounting base and the sliding guide rail to achieve height locking; specifically, the positioning mechanism is provided with a threaded hole on the mounting base and a positioning knob, the screw of the positioning knob passes through the sliding guide rail and is screwed into the threaded hole.
[0014] Preferably, the outer cover of the second laser head is provided with a detachable light shield, the opening of which faces the scale surface.
[0015] This utility model provides a road concrete slump detection device, which has the following advantages compared with the prior art:
[0016] This concrete slump meter uses a dual-head laser emitter, making readings simpler. After the laser head accurately positions the concrete height, it automatically projects a light spot onto the scale. The surveyor only needs to observe the value of the light spot on the scale, eliminating the need for complex visual alignment.
[0017] This concrete slump tester is equipped with a light shield to protect it from strong outdoor sunlight. This not only ensures that the indicator light spot remains clearly visible under bright sunlight, but also effectively prevents laser scattering from damaging the eyes. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the appearance of the present utility model;
[0019] Figure 2 This is a schematic diagram of the appearance of the present utility model;
[0020] Figure 3 This is a schematic diagram of the appearance of the laser detection component of this utility model;
[0021] Figure 4 This is a schematic diagram of the disassembled laser detection component of this utility model.
[0022] In the diagram: 1. Slump cone body; 2. Handle; 3. Footboard; 4. Loading funnel; 5. Marker-type tamping rod; 6. Sliding guide rail scale assembly; 7. Laser detection assembly;
[0023] 61. Ruler body; 62. Sliding guide rail;
[0024] 71. Laser emitter; 72. Mounting base; 73. Positioning knob; 74. Light shield. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figures 1-4 This utility model provides a road concrete slump detection device, including a benchmark tamping rod 5, a slump cylinder assembly, a sliding guide rail scale assembly 6, and a laser detection assembly 7;
[0027] The slump cylinder assembly includes a slump cylinder body 1, handles 2 disposed on both sides of the body, a foot plate 3 disposed at the bottom of the body, and a detachable loading funnel 4 disposed at the top of the body.
[0028] The sliding guide rail scale assembly 6 is fixedly installed on the side wall of the slump cylinder body 1, including a ruler 61 and a sliding guide rail 62. The ruler 61 has a scale surface perpendicular to the bottom surface of the body, and scale lines are provided on the scale surface.
[0029] The laser detection component 7 is slidably disposed on the sliding guide rail 62; the laser detection component 7 includes a mounting base 72 and a laser emitter 71 mounted on the mounting base 72;
[0030] The laser emitter 71 is a dual-head laser emitter, comprising a first laser head and a second laser head. The first laser head is used to point to the target location of the concrete to be measured, and the second laser head is used to point to the scale surface and form an indicator light spot on the scale line. The first laser head emits light horizontally, and when the light just brushes past or illuminates the highest point of the collapsed concrete pile, it indicates that the height positioning is complete. At the same time, the second laser head, facing away from the target, simultaneously emits a beam of light, which directly hits the scale line of the ruler 61. The operator does not need to look at the scale horizontally; they only need to look at where the green dot is projected on the ruler by the second laser head to obtain an accurate value.
[0031] Preferably, the ruler body 61 has a triangular cross-section, with one side fixed to the inclined outer wall of the slump cylinder body 1, and the other side forming a scale reference surface perpendicular to the bottom surface; the sliding guide rail 62 is vertically arranged on the edge or side of the ruler body 61. A standard slump cylinder is a frustum-shaped cylinder, smaller at the top and larger at the bottom, with inclined side walls. If a ruler is directly attached to the cylinder wall, the ruler will also be crooked, resulting in an error in the measured vertical height. The ruler body 61 acts as a "compensator," offsetting the inclination angle of the cylinder wall, thereby ensuring that the scale surface is perpendicular to the plane of the ground.
[0032] Preferably, a horizontal cylindrical tube is fixed to the mounting base 72 to accommodate the laser emitter 71; the inner wall of the cylindrical tube is lined with a silicone layer, and an elastic slit is provided on the side of the tube. This facilitates the embedding and positioning of the laser emitter 71.
[0033] Preferably, a positioning mechanism is provided between the mounting base 72 and the sliding guide rail 62 to achieve height locking; specifically, the positioning mechanism has a threaded hole on the mounting base 72 and is equipped with a positioning knob 73, the screw of the positioning knob 73 passing through the sliding guide rail 62 and screwed into the threaded hole. The friction generated by tightening locks the mounting base 72 in any position on the guide rail.
[0034] Preferably, the outer cover of the second laser head is provided with a detachable light shield 74, the opening of which faces the scale surface. The light shield 74 is used to block the residual light generated by laser scattering, thereby improving the clarity of the reading.
[0035] Place the slump cone body 1 in the center of the base plate, and the operator firmly presses down on the footboard 3 to stabilize the cone. Concrete is poured in three layers according to specifications, with each layer tamped 25 times from the edge to the center using a tamping rod 5. After filling, the cone opening is leveled and any remaining concrete around the base plate is cleaned. Then, holding the handle 2 with both hands, the slump cone body 1 is lifted vertically and steadily upwards within 5 to 10 seconds, allowing the concrete sample to collapse naturally under gravity. Once the concrete has stabilized, the laser detection component 7 is activated. At this time, the front laser head of the dual-head laser emitter 71 emits a horizontal detection beam, and the rear laser head projects the reading beam onto the scale surface of the ruler 61.
[0036] Slide the mounting base 72 downwards along the sliding guide rail 62 and visually observe the horizontal probe light. Stop sliding when the beam is just tangent to the highest point of the concrete pile. Read the value indicated by the laser spot on the ruler 61, which is the final slump value.
[0037] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0038] It should be noted that the above description and illustration of the basic principles, main features and advantages of this utility model should be understood by those skilled in the art. This utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.
Claims
1. A device for detecting the slump of road concrete, comprising: The pole type rammer, slump cone assembly, sliding guide rail scale assembly and laser detection assembly are provided. The slump cone assembly comprises a slump cone body, handles arranged on both sides of the body, a foot plate arranged at the bottom of the body and a loading hopper detachably arranged on the top of the body. The sliding guide rail scale assembly is fixedly arranged on the side wall of the slump cone body and comprises a ruler body and a sliding guide rail. The laser detection assembly is slidably arranged on the sliding guide rail. The laser detection assembly comprises a mounting seat and a laser emitter mounted on the mounting seat.
2. The road concrete slump detection device according to claim 1, characterized in that: The laser emitter is a double-head laser emitter comprising a first laser head and a second laser head.
3. The road concrete slump detection device according to claim 1, characterized in that: The first laser head is used for pointing to a target position of the concrete to be measured, and the second laser head is used for pointing to the scale surface and forming an indicating light spot on the scale line.
4. The road concrete slump detection device according to claim 1, characterized in that: The cross section of the ruler body is triangular, one side of which is fixedly attached to the inclined outer wall of the slump cone body, and the other side forms a scale reference surface perpendicular to the bottom surface.
5. The road concrete slump detection device according to claim 1, characterized in that: The sliding guide rail is arranged on the edge or side of the triangular ruler body in the vertical direction. A horizontal straight cylinder is fixed to the mounting seat for accommodating the laser emitter. The inner wall of the straight cylinder is lined with a silica gel layer, and the side of the cylinder body is provided with an elastic notch. A positioning mechanism is arranged between the mounting seat and the sliding guide rail to realize height locking. The positioning mechanism comprises a threaded hole formed in the mounting seat and a positioning knob. The outer side of the second laser head is covered with a detachable light shield, and the opening of the light shield is opposite to the scale surface.