A device for testing the uniformity of precast concrete mixing

Abstract

This utility model relates to the field of concrete mixing uniformity testing technology, specifically a precast concrete mixing uniformity testing device. It includes two sets of symmetrically installed fixed blocks, with a handle mounted between the fixed blocks via a shaft. A testing mechanism is located at the bottom of each fixed block, and the testing mechanism includes a microwave generator. A coaxial connecting line is detachably installed on one side of the microwave generator, and a testing probe is fixedly installed at the end of the coaxial connecting line. This utility model uses microwave dielectric analysis technology to directly penetrate the concrete interior for component distribution testing, solving the problem that traditional image detection methods can only assess surface conditions. It can accurately identify internal defects such as uneven aggregate distribution and moisture segregation. Furthermore, by using a non-contact testing method, real-time testing can be completed without damaging the concrete structure, significantly improving testing efficiency. It is also adaptable to complex industrial environments such as dust and vibration, and its stability is superior to traditional laboratory testing methods.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixing uniformity testing technology, specifically a device for testing the mixing uniformity of precast concrete. Background Technology

[0002] A precast concrete mixing uniformity testing device is a specialized instrument used to assess the uniformity of the distribution of various components (such as aggregates, cement paste, and water) in precast concrete materials during the mixing process. By detecting the uniformity of the internal components of the concrete, it ensures that precast components possess consistent mechanical properties and durability. Since uneven mixing can lead to insufficient concrete strength, cracking, or localized defects, directly affecting the safety and service life of engineering structures, this device is essential for quickly and non-destructively identifying mixing quality problems during the precast production stage. This prevents substandard components from entering the construction phase, thereby ensuring project quality and reducing the risk of rework.

[0003] However, traditional image-based inspection relies on optical imaging, which can only analyze the surface features of concrete and cannot reflect the true distribution of internal components. The inspection results are easily affected by factors such as lighting conditions and surface contamination. At the same time, existing laboratory testing methods require manual sampling and rely on post-curing and destructive testing, resulting in long inspection cycles and the inability to achieve real-time quality monitoring during the production process. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting the uniformity of precast concrete mixing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for testing the uniformity of precast concrete mixing includes two sets of symmetrically installed fixed blocks. A handle is installed between the fixed blocks via a shaft. A testing mechanism is provided at the bottom of each fixed block. The testing mechanism includes a microwave generator. A coaxial connecting line is detachably installed on one side of the microwave generator. A testing probe is fixedly installed at the end of the coaxial connecting line.

[0007] Preferably, the testing mechanism further includes a testing box, on the top center of which the fixing block is fixedly installed, and a magnetic suction groove is provided on the top of the testing box near the fixing block.

[0008] Preferably, a magnetic plate is magnetically installed in the magnetic groove, the magnetic plate is fixedly installed at the bottom of the plastic mold, and five sets of detection holes are opened on the side of the plastic mold away from the magnetic plate.

[0009] Preferably, a display screen is fixedly installed on the side of the testing box away from the magnetic groove, a control button is fixedly installed on the side of the testing box adjacent to the display screen, and a heat dissipation window is provided on the side of the testing box away from the control button.

[0010] Preferably, the testing box has a slot on the side away from the heat dissipation window, and a box cover is installed in the slot by bolts. A circuit board is installed on one side of the box cover by bolts.

[0011] Preferably, the circuit board is attached to the heat sink fins, and the side of the heat sink fins away from the circuit board extends through the outside of the cover. A switch is fixedly installed on the cover near the point where the heat sink fins extend through, and a charging slot is provided on the side of the cover near the switch.

[0012] Preferably, the slot has a component compartment and a battery compartment respectively opened by a partition. A microwave generator is installed in the component compartment by bolts, and a battery pack is installed in the battery compartment by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This device for detecting the uniformity of precast concrete mixing uses microwave dielectric analysis technology to directly penetrate the interior of the concrete to detect the component distribution. It solves the problem that traditional image detection methods can only assess the surface condition and can accurately identify internal defects such as uneven aggregate distribution and moisture segregation.

[0015] This device for testing the uniformity of precast concrete mixing uses a non-contact testing method, which can complete real-time testing without damaging the concrete structure, significantly improving testing efficiency. It is also adaptable to complex industrial environments such as dust and vibration, and its stability is superior to traditional laboratory testing methods. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 3 This is a disassembly diagram of the testing box of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the plastic mold of this utility model.

[0020] In the diagram: 101, fixing block; 102, handle; 103, microwave generator; 104, coaxial cable; 105, detection probe; 106, detection box; 201, magnetic slot; 202, magnetic plate; 203, plastic mold; 204, detection hole; 205, display screen; 206, control button; 301, heat dissipation window; 302, card slot; 303, box cover; 304, circuit board; 305, heat dissipation fins; 306, switch; 401, charging slot; 402, partition; 403, component compartment; 404, battery compartment; 405, battery pack; 406, detection mechanism. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0023] A device for testing the uniformity of precast concrete mixing includes two sets of symmetrically installed fixing blocks 101. A handle 102 is installed between the fixing blocks 101 via a shaft. A testing mechanism 406 is provided at the bottom of each fixing block 101. The testing mechanism 406 includes a microwave generator 103. A coaxial connecting line 104 is detachably installed on one side of the microwave generator 103. A testing probe 105 is fixedly installed at the end of the coaxial connecting line 104.

[0024] The above scheme achieves overall structural stability and force balance through symmetrically installed fixing blocks, allows for manual handling and force control via shaft-mounted handles, enables core detection of concrete uniformity via a detection mechanism at the bottom of the fixing blocks, generates high-frequency electromagnetic waves for dielectric property analysis via a microwave generator, facilitates flexible connection and maintenance of signal transmission paths via detachable coaxial cables, and enables directional transmission and reflection reception of microwave signals via a detection probe fixed at the end.

[0025] In this embodiment, preferably, the detection mechanism 406 further includes a detection box 106, the fixing block 101 is fixedly installed at the middle of the top of the detection box 106, and a magnetic groove 201 is opened on the side of the top of the detection box 106 adjacent to the fixing block 101.

[0026] The above solution enables the integrated packaging and protection of various functional modules through the testing box. The fixing block fixedly installed in the middle of the top of the testing box enables a reliable connection between the handle and the box body. The magnetic groove opened on the top of the testing box enables the rapid positioning and fixing of the plastic mold.

[0027] In this embodiment, preferably, a magnetic plate 202 is magnetically installed in the magnetic groove 201, the magnetic plate 202 is fixedly installed at the bottom of the plastic mold 203, and five sets of detection holes 204 are opened on the side of the plastic mold 203 away from the magnetic plate 202.

[0028] The above solution enables a stable connection between the plastic mold and the testing box through the magnetic suction plate installed in the magnetic suction groove. The magnetic suction plate fixedly installed at the bottom of the plastic mold enables standardized adaptation of the mold. The five sets of testing holes opened on the surface of the plastic mold enable vertical guidance and positioning repeatability of the testing probe.

[0029] In this embodiment, preferably, a display screen 205 is fixedly installed on the side of the detection box 106 away from the magnetic groove 201, a control button 206 is fixedly installed on the side of the detection box 106 adjacent to the display screen 205, and a heat dissipation window 301 is provided on the side of the detection box 106 away from the control button 206.

[0030] With the above solution, the display screen fixedly installed on the side of the test box away from the magnetic slot can realize the visualization of test data, the control buttons installed near the display screen can realize human-computer interaction and parameter adjustment, and the heat dissipation window opened on the side of the test box away from the control buttons can realize the natural dissipation of internal heat.

[0031] In this embodiment, preferably, the detection box 106 has a slot 302 on the side away from the heat dissipation window 301, and a box cover 303 is installed in the slot 302 by bolts, and a circuit board 304 is installed on one side of the box cover 303 by bolts.

[0032] The above solution allows for quick installation and removal of the cover by using a slot on the side of the test box away from the heat dissipation window. The cover, installed by bolts in the slot, provides protection and maintenance access for the internal components of the test box. The circuit board, installed by bolts on one side of the cover, provides hardware support for signal processing and system control.

[0033] In this embodiment, preferably, the circuit board 304 is attached to the heat sink fins 305, and the side of the heat sink fins 305 away from the circuit board 304 extends through the outside of the cover 303. A switch 306 is fixedly installed on the cover 303 near the point where the heat sink fins 305 extend through, and a charging slot 401 is provided on the side of the cover 303 near the switch 306.

[0034] The above solution enables heat conduction in high-frequency circuits by bonding the circuit board to the heat sink fins, achieves efficient heat dissipation by the heat sink fins penetrating the outside of the casing, controls power supply by a switch fixedly installed near the heat sink fin penetration, and allows for battery replenishment by a charging slot located on the side of the casing near the switch.

[0035] In this embodiment, preferably, the slot 302 is provided with a component compartment 403 and a battery compartment 404 respectively through a partition 402. The component compartment 403 is equipped with a microwave generator 103 by bolts, and the battery compartment 404 is equipped with a battery pack 405 by bolts.

[0036] The above solution achieves physical isolation and electromagnetic compatibility optimization of functional modules by separating the component compartment and battery compartment with partitions in the card slot. The microwave generator bolted in the component compartment enables stable generation of detection signals, and the battery pack bolted in the battery compartment provides continuous power supply for mobile use of the device.

[0037] In this embodiment, a precast concrete mixing uniformity testing device is used by the operator to move the device to the testing position via the shaft handle 102 between the symmetrical fixing blocks 101. The magnetic suction groove 201 at the top of the testing box 106 is precisely attracted and positioned by the magnetic suction plate 202 at the bottom of the plastic mold 203 (the magnetic suction plate 202 has a built-in neodymium iron boron permanent magnet array, a nickel-plated surface for rust prevention, and a magnetic attraction force ≥15N). After the operator pours freshly mixed concrete into the plastic mold 203 and smooths it, the five sets of testing holes 204 on the surface of the mold guide the testing probe 105 to be inserted vertically (the hole diameter is 0.5mm larger than the probe diameter, and the inner wall of the hole...). The coating of polytetrafluoroethylene (PTFE) reduces the coefficient of friction to 0.15. At this point, switch 306 is turned on, activating the microwave generator 103 (integrated with a frequency synthesizer, power amplifier, and temperature-controlled crystal oscillator, with an adjustable output frequency of 2.45GHz±10MHz). The generator transmits microwave signals to the detection probe 105 (integrated with a miniature open waveguide antenna, piezoelectric pressure sensor, and PT100 temperature compensation module) via a detachable coaxial cable. After the probe is inserted into the detection hole 204, the pressure sensor monitors the contact pressure in real time (automatic signal acquisition is triggered at a threshold of 5±0.5N). The microwaves are radiated into the concrete through the waveguide antenna. Different dielectric properties of water, aggregates, and cement slurry result in differential reflections (water dielectric constant ε'≈80, aggregate ε'≈4-8, cement slurry ε'≈15-25). The reflected waves are received by the antenna and transmitted back via cable to circuit board 304 (which integrates a 24-bit high-speed ADC, DSP digital signal processor, and adaptive temperature drift compensation algorithm; sampling rate 100kS / s; temperature drift compensation accuracy ±0.1% / ℃). Circuit board 304 performs time-domain and frequency-domain joint analysis on the reflected signals (FFT transform points 1024, frequency resolution ≤1MHz), simultaneously fusing temperature sensor data (measurement range...). The temperature range is -20℃ to 80℃, with an accuracy of ±0.5℃. This eliminates the influence of environmental temperature drift. The dielectric constant variation coefficient (CV value) and uniformity index H of the five detection points are calculated (H≥0.92 is considered qualified, and the sensitivity reaches 5mm particle size agglomeration identification). The analysis results are displayed in real time on the display screen 205 as a thermal map and numerical report. The control button 206 supports mode switching and data storage. The heat dissipation window 301 and the heat dissipation fins 305 work together: the heat of the battery compartment 404 is naturally discharged through the heat dissipation window 301, and the heat of the microwave generator 103 and circuit board 304 in the component compartment 403 is forcibly dissipated by the fins.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the uniformity of precast concrete mixing, comprising two sets of symmetrically installed fixing blocks (101), a handle (102) being installed between the fixing blocks (101) via a shaft, a detection mechanism (406) being provided at the bottom of the fixing blocks (101), the detection mechanism (406) including a microwave generator (103), a coaxial connecting line (104) being detachably installed on one side of the microwave generator (103), and a detection probe (105) being fixedly installed at the end of the coaxial connecting line (104).

2. The precast concrete mixing uniformity detection device according to claim 1, characterized in that: The testing mechanism (406) also includes a testing box (106), on which the fixing block (101) is fixedly installed in the middle of the top of the testing box (106), and a magnetic groove (201) is provided on the side of the top of the testing box (106) adjacent to the fixing block (101).

3. A precast concrete mixing uniformity detection device according to claim 2, wherein: A magnetic plate (202) is magnetically installed inside the magnetic groove (201). The magnetic plate (202) is fixedly installed at the bottom of the plastic mold (203). Five sets of detection holes (204) are opened on the side of the plastic mold (203) away from the magnetic plate (202).

4. The precast concrete mixing uniformity detection device of claim 3, wherein: A display screen (205) is fixedly installed on the side of the testing box (106) away from the magnetic groove (201). A control button (206) is fixedly installed on the side of the testing box (106) adjacent to the display screen (205). A heat dissipation window (301) is provided on the side of the testing box (106) away from the control button (206).

5. A precast concrete mix uniformity detection device as claimed in claim 4, wherein: The detection box (106) has a slot (302) on the side away from the heat dissipation window (301). A box cover (303) is installed in the slot (302) by bolts. A circuit board (304) is installed on one side of the box cover (303) by bolts.

6. A precast concrete mix uniformity detection device as claimed in claim 5, wherein: The circuit board (304) is attached to the heat sink fins (305), and the side of the heat sink fins (305) away from the circuit board (304) extends through the outside of the cover (303). A switch (306) is fixedly installed on the cover (303) near the point where the heat sink fins (305) pass through. A charging slot (401) is provided on the side of the cover (303) near the switch (306).

7. A precast concrete mix uniformity detection device as claimed in claim 6, wherein: The slot (302) is provided with a component compartment (403) and a battery compartment (404) respectively through a partition (402). A microwave generator (103) is installed in the component compartment (403) by bolts, and a battery pack (405) is installed in the battery compartment (404) by bolts.

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