Device and method for detecting grouting fullness of concrete prefabricated panel

Abstract

The invention discloses a device and a method for detecting grouting fullness of a concrete prefabricated wallboard, and relates to the technical field of grouting fullness detection of prefabricated wallboards. The device comprises a plurality of grouting sleeves which are pre-buried in a prefabricated wallboard and provided with grouting pipes and grout outlet pipes, and further comprises a detection cylinder, a gas detection unit is arranged in the detection cylinder, and a gas injection assembly and a gas return assembly are arranged in the gas detection unit; the control unit is arranged outside the detection cylinder; and a shock excitation hammer used for impacting the prefabricated wall panel is arranged in the impact detection unit. The method has the advantages that by adopting a nondestructive detection mode of detecting the air pressure change of the upper part through lower part air exhaust and detecting the air collection content of the upper part through lower part air blowing, the interior of the grouting sleeve is not influenced during detection, the fullness of the slurry in the cured grouting sleeve can be accurately calculated, and the detection accuracy is improved by adopting a detection mode of detecting echoes through multi-position hammering. The internal compactness of the grouting sleeve and the position of a cavity can be visually detected, and the detection range is wider.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated wall panel grouting fullness detection, and in particular to a concrete prefabricated wall panel grouting fullness detection device and method. Background Art

[0002] Autoclaved aerated concrete refers to a new type of concrete material made by mixing cement, lime, gypsum, sand, aluminum powder and other raw materials and then heating and steam pressure under high temperature and high pressure environment. Prefabricated wall panels made of autoclaved aerated concrete materials have the advantages of light weight, good thermal insulation and good fire resistance. When assembling and installing autoclaved aerated concrete prefabricated wall panels, grouting is usually performed in the grouting sleeve to complete the curing connection between the wall panels and the foundation, so as to improve the integrity of the connection between the prefabricated wall panels and the foundation. After the grouting is completed, a detection device is usually used to detect the fullness of the curing slurry inside the grouting sleeve, so as to judge the effect of the grouting and whether grouting is needed; Existing detection devices use a variety of methods to detect fullness, such as a prefabricated concrete structure grouting fullness detection device and detection method with publication number CN112798767B, which relates to the technical field of prefabricated concrete structure grouting fullness detection, and improves the problem of excessive overflow of grouting material causing sleeve grouting to be unrealistic. It includes a detection sleeve for extending into a grouting outlet channel, and the outer peripheral side of the detection sleeve is protruded with a sealing plug for blocking the grouting outlet channel; The existing detection device usually performs fullness detection after the grouting is completed. At this time, the grout in the grouting sleeve is not completely solidified, so that the grout in the grouting sleeve will move during the detection, and the gap between the grouts will change at any time, affecting the detection result. For example, the above-mentioned referenced prior art, the device determines the fullness of the grouting by judging whether the grout in the grouting sleeve moves. This detection method can only determine whether the grout in the grouting sleeve is filled, but cannot determine whether there are cavities inside the grout, that is, it is impossible to accurately determine the fullness of the grout in the grouting sleeve, and the slurry will move during the detection, affecting the filling effect of the slurry. The detection method is also relatively single and cannot detect the actual fullness; Therefore, it is urgent to design a concrete prefabricated wall panel grouting fullness detection device and method to solve the above problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device and method for detecting the grouting fullness of a prefabricated concrete wall panel, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a concrete prefabricated wall panel grouting fullness detection device, comprising a plurality of grouting sleeves embedded in the prefabricated wall panel and provided with grouting pipes and grouting outlet pipes, each of the grouting sleeves is embedded with fastening steel bars, and also includes: A detection tube, in which a gas measuring unit is arranged, which detects the grouting fullness by injecting gas into the grouting sleeve and detecting the grouting fullness according to the change in air pressure and the amount of gas flow, and in which a gas injection component and a gas return component are arranged; The control unit is arranged outside the detection tube and is used to control the air inlet and outlet of the air measuring unit and realize the air pressure change detection; The impact detection unit is arranged outside the detection tube and is used for hammering the prefabricated wall panel to detect the grouting fullness by detecting the echo velocity of the impact elastic wave. An exciting hammer for impacting the prefabricated wall panel is arranged inside the unit.

[0005] Preferably, the gas measurement unit includes a fixed cylinder fixedly connected to the lower part of the detection cylinder, the upper part of the detection cylinder is slidably connected to a telescopic cylinder, the fixed cylinder and the telescopic cylinder are both fixedly connected to a sleeve pipe, and the two sleeve pipes are respectively matched with a grouting pipe and a grouting outlet pipe, and each of the sleeve pipes is installed with a positioning mechanism.

[0006] Preferably, the positioning mechanism comprises an elastic sealing plug fixedly installed in the sleeve tube, an adsorption plate matched with the prefabricated wall panel is fixedly installed outside the sleeve tube, and a pressure relief valve is arranged on the adsorption plate.

[0007] Preferably, the gas injection assembly includes a gas injection tube fixedly installed between a fixed cylinder and a lower elastic sealing plug, a pressurizing tube is threadedly installed on the gas injection tube, and a threaded adjusting rod is threadedly installed on the pressurizing tube, a gas pressure plate is slidably installed in the pressurizing tube, and the gas pressure plate is rotatably connected to the threaded adjusting rod, and a pressure scale is provided on the pressurizing tube.

[0008] Preferably, the return air assembly includes a return air pipe fixedly mounted on the upper elastic sealing plug, and the return air pipe is located inside the telescopic cylinder and the detection cylinder, a fixed plate is fixedly mounted inside the detection cylinder, and the fixed plate is filled with liquid paraffin melt, a lifting plate is slidably mounted inside the detection cylinder, and the lifting plate is slidably connected to the return air pipe, and a measuring mechanism is provided on the detection cylinder.

[0009] Preferably, the control unit includes an operating table, and a control panel is arranged on the operating table, an air pump for replenishing air into the pressurized pipe is arranged in the operating table, and a connecting duct is arranged on the air pump, an air replenishment pipe is fixedly connected to the pressurized pipe, and the air replenishment pipe is fixedly connected to the connecting duct, and an air pressure detector is arranged on the air inlet end of the return air pipe, and the air pressure detector is used to detect the air pressure change at the slurry outlet pipe.

[0010] Preferably, the impact detection unit includes a fixed plate fixedly mounted on the detection tube, a sliding plate slidably mounted on the fixed plate, a steering shaft fixedly mounted on the sliding plate, a support rod rotatably mounted on the steering shaft, and an exciting hammer for striking the prefabricated wall panel to generate impact elastic waves fixedly mounted on the support rod, two compression springs rotatably connected between the support rod and the sliding plate, and an echo detection disk for receiving and detecting rebound waves fixedly mounted on the fixed plate via a telescopic rod.

[0011] Preferably, two handles are provided on the side of the detection tube, and a pull-back control handle is fixedly mounted on the support rod.

[0012] Preferably, the measuring mechanism includes a transparent observation window arranged on the detection cylinder for observing the changes in the internal state of the detection cylinder, and the transparent observation window is provided with a return air scale for detecting the volume change of the gas in the detection cylinder. The detection cylinder is provided with an exhaust pipe, and the exhaust pipe is located on the upper part of the fixed plate.

[0013] A method for detecting the grouting fullness of a prefabricated concrete wall panel, used in the above-mentioned detection device, comprises the following steps: S1. According to the positions of the grouting pipe and the grouting outlet pipe on the grouting sleeve in the prefabricated wall panel, adjust the position of the gas detection unit on the detection tube, adjust the gas detection unit to fix it on the grouting pipe and the grouting outlet pipe, complete the positioning of the detection tube, and position and seal the grouting pipe and the grouting outlet pipe; S2, control the air injection assembly to start the air in the grouting sleeve through the grouting pipe through the control unit, and detect the air pressure change at the grouting pipe in real time. If the air pressure change at the grouting pipe is small or no change, it is judged that the grouting fullness of the concrete in the grouting sleeve is high. If the air pressure change is large, it is judged that the grouting fullness of the concrete in the grouting sleeve is low and there are many holes in it. S3, controlling the gas injection assembly to start injecting gas into the grouting pipe through the control unit, and measuring the volume of the injected gas, collecting the gas discharged through the grouting pipe through the gas return assembly, and observing the collected gas volume, so as to detect the grouting fullness of the concrete in the grouting sleeve according to the change between the collected gas volume and the injected gas volume, and calculate the actual grouting fullness; S4. The impact detection unit is used to control the exciting hammer to impact the prefabricated wall panels outside the grouting sleeve at different heights and angles, so that impact elastic waves are generated in the prefabricated wall panels and the grouting sleeve. At the same time, the rebound waves generated by the impact elastic waves are received, and the fullness of the concrete in the grouting sleeve is judged according to the change in the rebound wave receiving time.

[0014] The present invention provides a device and method for detecting the grouting fullness of a prefabricated concrete wall panel. It has the following beneficial effects: 1. When testing the grouting fullness in the grouting sleeve, the detection device can be carried out after the slurry in the grouting sleeve is solidified, which can effectively avoid damage to the internal structure of the grouting sleeve slurry during the detection, realize efficient non-destructive detection, and the solidification detection can avoid the change of slurry affecting the detection result, and the detection error is smaller.

[0015] 2. When the detection device detects the fullness of the grouting in the grouting sleeve, it adopts a detection method of extracting air from the lower grouting pipe and simultaneously detecting the change of air pressure in the upper grouting pipe. The fullness of the grouting sleeve can be quickly and intuitively detected by the amplitude of the change of air pressure.

[0016] 3. When detecting the fullness of the grouting in the grouting sleeve, the detection device uses a vibration hammer to hit the prefabricated wall panel multiple times and in multiple positions and detects the rebound wave. It can judge whether the slurry in the grouting sleeve is dense according to the time of receiving the rebound wave, and can quickly determine the location of the void in the slurry, so the detection effect is better.

[0017] 4. When the detection device detects the fullness of the grouting in the grouting sleeve, it adopts the method of blowing air into the grouting pipe and collecting the gas through the grouting pipe. It can not only visually judge the range of the voids in the slurry in the grouting sleeve by observing the time and number of bubbles appearing in the liquid paraffin, but also accurately calculate the fullness of the slurry in the grouting sleeve according to the volume changes of the air intake and outlet, and the detection result is more accurate.

[0018] To sum up, the present invention adopts a non-destructive testing method of detecting the change of upper air pressure by lower air extraction and detecting the upper gas collection content by lower air blowing. The detection will not affect the inside of the grouting sleeve, and the fullness of the slurry inside the grouting sleeve after curing can be accurately calculated. By adopting a detection method of multi-position hammer detection echo, the internal density of the grouting sleeve and the location of the void can be intuitively detected, and the detection range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 This is a structural schematic diagram of a device for detecting the grouting fullness of a prefabricated concrete wall panel proposed by the present invention; Figure 2 It is a schematic diagram of the connection structure between the detection device and the grouting sleeve; Figure 3 It is a structural schematic diagram of the detection device; Figure 4 for Figure 3 Schematic diagram of structural decomposition; Figure 5 It is a structural schematic diagram of the impact detection unit in the present invention; Figure 6 for Figure 5 Schematic diagram of structural decomposition; Figure 7 It is a structural schematic diagram of the gas measurement unit in the present invention; Figure 8 for Figure 7 Top view after removing the two adsorption plates; Fig. 9 for Figure 8 Structural cross-section view of AA in the middle; Fig.10 for Fig. 9 Schematic diagram of the three-dimensional structure; Fig.11 for Fig.10 Schematic diagram of the structural decomposition of the elastic sealing plug and the return air pipe.

[0020] In the figure: 1 prefabricated wall panel, 2 slurry outlet pipe, 3 grouting pipe, 4 detection tube, 5 pressurized pipe, 6 operating table, 7 grouting sleeve, 8 connecting guide tube, 9 telescopic tube, 10 adsorption plate, 11 fixed tube, 12 handle, 13 sleeve pipe, 14 pressure relief valve, 15 fixed plate, 16 elastic sealing plug, 17 fastening steel bar, 18 echo detection plate, 19 sliding plate, 20 exciting hammer, 21 compression spring, 22 steering shaft, 23 threaded adjustment rod, 24 pressurized scale, 25 transparent observation window, 26 return air scale, 27 air supply pipe, 28 air injection pipe, 29 return air pipe, 30 lifting plate, 31 fixed plate, 32 air pressure plate, 33 air pressure detector, 34 control panel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Example 1: Reference Figure 1-Figure 4 A grouting fullness detection device for a concrete prefabricated wall panel comprises a plurality of grouting sleeves 7 provided with grouting pipes 3 and grouting outlet pipes 2, which are pre-buried in a prefabricated wall panel 1. The grouting pipes 3 are used to inject grouting material into the grouting sleeves 7. The grouting outlet pipes 2 are used to discharge excess grouting material after the grouting sleeves 7 are filled with grouting material. Whether the grouting is completed is judged based on whether grouting material flows out of the grouting outlet pipes 2. Each grouting sleeve 7 is pre-buried with fastening steel bars 17 . After the fastening steel bars 17 are combined with the grout and solidified, a stable overall structure can be formed, thereby improving the stability and bearing capacity of the grouting sleeve 7 structure.

[0023] The difference between the internal volume of the grouting sleeve 7 and the volume of the built-in fastening steel bars 17 is the volume of the grouting slurry to be grouted in the grouting sleeve 7 .

[0024] The detection device includes a detection tube 4, in which a gas detection unit is arranged. The gas detection unit detects the grouting fullness by sucking and injecting gas into the grouting sleeve 7 and based on the change of air pressure and the gas flow rate. The gas test determines whether the upper air pressure changes by suctioning air from the lower part to visually determine the density inside the grouting sleeve 7, and detects the density of the slurry inside the grouting sleeve 7 by injecting air from the lower part and collecting air from the upper part.

[0025] The control unit is arranged outside the detection tube 4, and is used to control the air inlet and outlet of the air detection unit and realize the detection of air pressure changes. It can also cooperate with the air detection unit to realize the suction or replenishment of air in the grouting sleeve 7.

[0026] The impact detection unit is arranged on the outside of the detection tube 4, and is used to hammer the prefabricated wall panel 1 to detect the echo speed of the impact elastic wave to realize the grouting fullness detection. By hammering different positions on the prefabricated wall panel 1, it is determined whether the receiving time of the rebound wave changes and the position where the change occurs, and the position where the cavity appears in the slurry in the grouting sleeve 7 can be determined.

[0027] Two handles 12 are arranged on the side of the detection tube 4, and the two handles 12 can be used to drive the detection tube 4 to move as a whole, so as to detect the fullness of the inside of different grouting sleeves 7 and improve the detection efficiency.

[0028] Example 2: Reference Figure 2-Figure 4 as well as Figure 7-Figure 11 The technical solution of this embodiment is different from that of the first embodiment in that the gas detection unit includes a fixed tube 11 fixedly connected to the lower part of the detection tube 4, the upper part of the detection tube 4 is slidably connected to the telescopic tube 9, and the fixed tube 11 and the telescopic tube 9 are both fixedly connected to a sleeve tube 13, and the two sleeve tubes 13 are respectively matched with the grouting tube 3 and the grouting tube 2; When the fullness of the grouting sleeve 7 is detected, first, according to the positions of the grouting pipe 3 and the slurry outlet pipe 2 on the grouting sleeve 7, the sleeve pipe 13 on the lower fixed tube 11 is engaged and sleeved to the outside of the lower grouting pipe 3, and then according to the height position of the upper slurry outlet pipe 2, the height of the telescopic tube 9 is adjusted so that the sleeve pipe 13 on the telescopic tube 9 can be sleeved to the outside of the upper slurry outlet pipe 2 to complete the preliminary positioning.

[0029] Each sleeve tube 13 is equipped with a positioning mechanism, which includes an elastic sealing plug 16 fixedly installed in the sleeve tube 13. An adsorption plate 10 matched with the prefabricated wall panel 1 is fixedly installed outside the sleeve tube 13, and a pressure relief valve 14 is provided on the adsorption plate 10; When both sleeve pipes 13 are completely sleeved, the elastic sealing plugs 16 in the two sleeve pipes 13 will be engaged and squeezed into the corresponding grouting pipe 3 or grouting pipe 2. The elastic sealing plugs 16 can not only play the role of further positioning the sleeve pipe 13, but also seal the grouting pipe 3 or grouting pipe 2 to avoid the gap between the two affecting the subsequent air pressure detection results. Then open the pressure relief valve 14 on the adsorption plate 10, squeeze the adsorption plate 10 to deform and compress the air so that it is adsorbed on the prefabricated wallboard 1, and then close the pressure relief valve 14 to complete the positioning of the adsorption plate 10, so that it can be tightly adsorbed on the prefabricated wallboard 1, so that the device will not fall during detection; When the detection is completed, the positioning of the adsorption disk 10 can be released by simply opening the pressure relief valve 14 to replenish air inside the adsorption disk 10 .

[0030] In a further embodiment, a gas injection assembly and a gas return assembly are provided in the gas measurement unit, the gas injection assembly includes a gas injection pipe 28 fixedly installed between the fixed cylinder 11 and the lower elastic sealing plug 16, the pressure pipe 5 is threadedly installed on the gas injection pipe 28, and the gas return assembly includes a gas return pipe 29 fixedly installed on the upper elastic sealing plug 16; The control unit includes an operation table 6, and a control panel 34 is provided on the operation table 6. An air pump for replenishing air into the pressurized tube 5 is provided in the operation table 6, and a connecting conduit 8 is provided on the air pump. The pressurized tube 5 is fixedly connected with an air replenishing tube 27, and the air replenishing tube 27 is fixedly connected with the connecting conduit 8. When the lower sleeve pipe 13 is connected to the grouting pipe 3, the grouting pipe 3 is connected to the gas injection pipe 28. When the upper sleeve pipe 13 is connected to the upper slurry outlet pipe 2, the slurry outlet pipe 2 is connected to the return air pipe 29. That is, the return air pipe 29, the slurry outlet pipe 2, the grouting sleeve 7, the grouting pipe 3, and the gas injection pipe 28 are all in a connected state. An air pressure detector 33 is provided on the air inlet end of the return air pipe 29. The air pressure detector 33 is used to detect the air pressure change at the grout pipe 2. The air pump is started to suck air into the grouting pipe 3 through the pressurizing pipe 5 and the air injection pipe 28. When the grouting pipe 3 sucks air, the air in the grouting cavity in the grouting sleeve 7 is sucked out. At this time, the air pressure change at the grout pipe 2 can be detected by the air pressure detector 33 to judge the grouting cavity condition in the grouting sleeve 7. If the slurry in the grouting sleeve 7 has fewer cavities and a higher density, the suction force generated at the air injection pipe 28 will not have much effect on the slurry outlet pipe 2, that is, the air in the return air pipe 29 cannot be sucked out when air is sucked through the air injection pipe 28 (the lower end of the return air pipe 29 is closed while air is sucked in, that is, the lower end cannot suck air), which means that the air in the grouting sleeve 7 cannot flow smoothly, that is, the pressure at the slurry outlet pipe 2 does not change much at this time. If the pressure at the slurry outlet pipe 2 changes greatly, it means that more air in the return air pipe 29 is sucked away through the slurry outlet pipe 2, which means that there are more slurry cavities in the grouting sleeve 7 and the air flows smoothly, thereby intuitively judging the fullness of the slurry in the grouting sleeve 7.

[0031] In a further embodiment, a threaded adjustment rod 23 is threadedly installed on the pressurized tube 5, a gas pressure plate 32 is slidably installed in the pressurized tube 5, and the gas pressure plate 32 is rotatably connected to the threaded adjustment rod 23, and a pressurized scale 24 is provided on the pressurized tube 5; When the air pressure detector 33 detects that there are many slurry voids in the grouting sleeve 7, the air in the air grouting sleeve 7 can be completely evacuated by the air pump, and then the air is firstly added to the pressurized pipe 5 by the air pump, and then the air pressure plate 32 is driven by rotating the threaded adjustment rod 23 to make it move horizontally in the pressurized pipe 5, so that the air in the pressurized pipe 5 can be gradually pressed into the grouting sleeve 7 through the air injection pipe 28 and the grouting pipe 3 to fill the voids therein; When the air compressor 32 moves to the maximum position, the reverse threaded adjustment rod 23 drives the air compressor 32 to reset and the air in the pressurized tube 5 is replenished by the air pump (the air injection tube 28 is closed while the air is replenished). After the replenishment is completed, the above-mentioned air injection operation is repeated until the air injection is completed. The total amount of air injected can be recorded by the pressure scale 24 on the pressurized tube 5.

[0032] The return air pipe 29 is located in the telescopic cylinder 9 and the detection cylinder 4. A fixed disk 31 is fixedly installed in the detection cylinder 4, and the fixed disk 31 is filled with liquid paraffin melt; When the air in the cavities in the grouting sleeve 7 is completely filled, the excess air in the grouting sleeve 7 will be discharged through the slurry outlet pipe 2 and injected into the detection tube 4 through the return air pipe 29. The lower end of the return air pipe 29 is located in the liquid paraffin melt. The air in the return air pipe 29 will be injected into the liquid paraffin melt after being discharged and will emerge in the form of bubbles. The number of slurry cavities in the grouting sleeve 7 can be judged by observing the time when the bubbles emerge. The shorter the time when the bubbles emerge, the more cavities there are (the more air needs to be filled).

[0033] Liquid paraffin melt is a non-soluble solvent. Air will not dissolve when injected into it, thus effectively avoiding air loss and affecting the test results.

[0034] In a further embodiment, a lifting plate 30 is slidably installed in the detection cylinder 4, and the lifting plate 30 is slidably connected to the return air pipe 29, and a measuring mechanism is provided on the detection cylinder 4, the measuring mechanism includes a transparent observation window 25 provided on the detection cylinder 4 for observing the internal state change of the detection cylinder 4, and a return air scale 26 for detecting the volume change of the gas in the detection cylinder 4 is provided on the transparent observation window 25; When the excess air gradually emerges from the liquid paraffin melt, it will accumulate between the liquid paraffin melt and the lifting plate 30. As the amount of air gradually increases, the lifting plate 30 will be gradually pushed upward. When the air injection is stopped, the height position of the lifting plate 30 at this time can be observed by the return air scale 26, and the volume content of the air collected in the detection tube 4 can be obtained. The fullness of the slurry in the grouting sleeve 7 can be calculated based on the volume of the injected air and the volume of the collected air. The lifting plate 30 is made of a lightweight material and has a light weight, so it will not exert a large pressure on the air, making it easier to lift and move under the action of the air.

[0035] The specific calculation formula for the fullness of the grout in the grouting sleeve 7 is: Grouting fullness = ； in: V 空隙体积 It is the total volume of air injected into the pressurized tube 5 minus the volume of air collected in the detection tube 4, that is, the volume occupied by the cavities in the slurry; V 套筒体积 - V 钢筋体积 That is the actual volume of the slurry in the sleeve; V 钢筋体积 is the volume of the steel bar inside the sleeve; V 套筒体积 is the total internal volume of the sleeve; An exhaust pipe is provided on the detection tube 4, and the exhaust pipe is located on the upper part of the fixed plate 31. When the detection is completed, the exhaust pipe can be opened to discharge the air in the detection tube 4, so that the lifting plate 30 returns to its original position, so as to facilitate the fullness detection of the next grouting sleeve 7.

[0036] Example 3: Reference Figure 1-Figure 6, the difference between this embodiment and the second embodiment is that: an exciting hammer 20 for impacting the prefabricated wall panel 1 is arranged in the impact detection unit, the impact detection unit includes a fixed plate 15 fixedly mounted on the detection tube 4, a sliding plate 19 is slidably mounted on the fixed plate 15, a steering shaft 22 is fixedly mounted on the sliding plate 19, and a support rod is rotatably mounted on the steering shaft 22, and an exciting hammer 20 for impacting the prefabricated wall panel 1 to generate an impact elastic wave is fixedly mounted on the support rod, and two compression springs 21 are rotatably connected between the support rod and the sliding plate 19; An echo detection plate 18 for receiving and detecting rebound waves is fixedly installed on the fixed plate 15 by a telescopic rod. When the position of the detection tube 4 is fixed, the telescopic rod can be adjusted to drive the fixed plate 15 to make the echo detection plate 18 on it fit with the prefabricated wall panel 1, and the detection preparation work is completed; A pull-back control handle is fixedly installed on the support rod, and the operator can use the pull-back control handle to drive the exciting hammer 20 to rotate to a certain angle and then release it (at this time, the two compression springs 21 will be squeezed). At this time, the support rod will drive the steering shaft 22 and the support rod to rotate under the action of the compression spring 21 returning to its original position, thereby driving the exciting hammer 20 to rotate and hit the prefabricated wall panel 1; When the vibration hammer 20 strikes the prefabricated wall panel 1, an impact elastic wave will be generated in the prefabricated wall panel 1 and the grouting sleeve 7. After the impact elastic wave is transmitted in the prefabricated wall panel 1 and the grouting sleeve 7, it will be absorbed and detected by the echo detection disk 18. It can be judged whether there is a cavity in the grouting sleeve 7 according to the time when the echo detection disk 18 detects the echo. If the slurry has a high density and few cavities, the prefabricated wall panel 1, the grouting sleeve 7 and the internal slurry will produce a mixed resonance, and the elastic wave signal generated by the striking of the exciting hammer 20 will not be affected but will propagate normally, so that the echo time detected by the echo detection disk 18 is short and the signal strength is high; If the density of the slurry is low and there are many voids, the elastic wave signal generated by the striking of the exciting hammer 20 will be transmitted to the position of the void and will propagate deeper along the void, that is, a climbing phenomenon will occur and a certain amount of energy loss will occur. At this time, the echo time detected by the echo detection disk 18 will increase and the signal strength will be lower, so the density and fullness of the slurry in the grouting sleeve 7 can be judged.

[0037] The sliding plate 19 can slide vertically on the fixed plate 15, which can drive the exciting hammer 20 to move vertically, thereby changing the position where the exciting hammer 20 knocks the prefabricated wall panel 1, and changing different knocking positions to judge the position and size of the cavity, that is, the echo detected by the echo detection disk 18 with an increasing time and a lower signal strength indicates that there is a cavity, and the longer the time and the weaker the signal strength, the larger the range of the cavity.

[0038] The embodiment of the present invention further provides a method for detecting the grouting fullness of a prefabricated concrete wall panel, which is used in the above-mentioned prefabricated concrete wall panel grouting fullness detection device, and comprises the following steps: S1. According to the positions of the grouting pipe 3 and the grouting pipe 2 on the grouting sleeve 7 in the prefabricated wall panel 1, adjust the position of the gas detection unit on the detection tube 4, adjust the gas detection unit to fix it on the grouting pipe 3 and the grouting pipe 2, complete the positioning of the detection tube 4, and position and block the grouting pipe 3 and the grouting pipe 2; S2, the control unit controls the air injection assembly to start the air in the grouting sleeve 7 through the grouting pipe 3, and detects the air pressure change at the grouting pipe 2 in real time. If the air pressure change at the grouting pipe 2 is small or unchanged, it is judged that the grouting fullness of the concrete in the grouting sleeve 7 is high. If the air pressure change is large, it is judged that the grouting fullness of the concrete in the grouting sleeve 7 is low and there are many holes in it. S3, the control unit controls the gas injection assembly to start injecting gas into the grouting pipe 3, and measures the volume of the injected gas, collects the gas discharged through the grouting pipe 2 through the gas return assembly, and observes the collected gas volume, and the grouting fullness of the concrete in the grouting sleeve 7 can be detected according to the change between the collected gas volume and the injected gas volume, and the actual grouting fullness is calculated; S4. The impact detection unit controls the exciting hammer 20 to impact the prefabricated wall panel 1 outside the grouting sleeve 7 at different heights and angles, so that impact elastic waves are generated in the prefabricated wall panel 1 and the grouting sleeve 7. At the same time, the rebound wave generated by the impact elastic wave is received, and the fullness of the concrete in the grouting sleeve 7 is judged according to the change in the rebound wave receiving time.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the grouting fullness of a concrete prefabricated wall panel, comprising a plurality of grouting sleeves (7) provided with grouting pipes (3) and grouting outlet pipes (2) pre-buried in a prefabricated wall panel (1), wherein each of the grouting sleeves (7) is pre-buried with a fastening steel bar (17), and characterized in that: Also includes: A detection tube (4), wherein a gas measuring unit is arranged in the detection tube (4), and the gas measuring unit detects the grouting fullness by injecting gas into the grouting sleeve (7) and based on the amount of gas pressure change and the amount of gas flow, a gas injection component and a gas return component are arranged in the gas measuring unit; A control unit, arranged outside the detection tube (4), for controlling the air inlet and outlet of the air measuring unit and realizing air pressure change detection; The impact detection unit is arranged outside the detection tube (4) and is used for hammering the prefabricated wall panel (1) to detect the echo velocity of the impact elastic wave to achieve grouting fullness detection. An exciting hammer (20) for impacting the prefabricated wall panel (1) is arranged inside the unit.

2. A grouting fullness detection device for a prefabricated concrete wall panel according to claim 1, characterized in that: The gas measurement unit comprises a fixed cylinder (11) fixedly connected to the lower part of the detection cylinder (4); the upper part of the detection cylinder (4) is slidably connected to a telescopic cylinder (9); a sleeve pipe (13) is fixedly connected to the fixed cylinder (11) and the telescopic cylinder (9); the two sleeve pipes (13) are respectively matched with a grouting pipe (3) and a grouting pipe (2); and each of the sleeve pipes (13) is installed with a positioning mechanism.

3. A grouting fullness detection device for prefabricated concrete wall panels according to claim 2, characterized in that: The positioning mechanism comprises an elastic sealing plug (16) fixedly mounted in a sleeve tube (13); a suction plate (10) matching the prefabricated wall panel (1) is fixedly mounted on the outside of the sleeve tube (13); and a pressure relief valve (14) is provided on the suction plate (10).

4. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 3, characterized in that: The gas injection assembly comprises a gas injection pipe (28) fixedly mounted between a fixed cylinder (11) and a lower elastic sealing plug (16); a pressurizing pipe (5) is threadedly mounted on the gas injection pipe (28); a threaded adjustment rod (23) is threadedly mounted on the pressurizing pipe (5); a gas pressure plate (32) is slidably mounted in the pressurizing pipe (5); the gas pressure plate (32) is rotatably connected to the threaded adjustment rod (23); and a pressurizing scale (24) is provided on the pressurizing pipe (5).

5. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 4, characterized in that: The air return assembly comprises an air return pipe (29) fixedly mounted on an upper elastic sealing plug (16), and the air return pipe (29) is located in the telescopic cylinder (9) and the detection cylinder (4), a fixed plate (31) is fixedly mounted in the detection cylinder (4), and the fixed plate (31) is filled with liquid paraffin melt, a lifting plate (30) is slidably mounted in the detection cylinder (4), and the lifting plate (30) is slidably connected to the air return pipe (29), and a measuring mechanism is provided on the detection cylinder (4).

6. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 5, characterized in that: The control unit comprises an operating table (6), and a control panel (34) is arranged on the operating table (6). An air pump for supplying air to the pressurized pipe (5) is arranged in the operating table (6), and a connecting conduit (8) is arranged on the air pump. An air supply pipe (27) is fixedly connected to the pressurized pipe (5), and the air supply pipe (27) is fixedly connected to the connecting conduit (8). An air pressure detector (33) is arranged on the air inlet end of the return air pipe (29), and the air pressure detector (33) is used to detect changes in air pressure at the pulp outlet pipe (2).

7. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 1, characterized in that: The impact detection unit comprises a fixed plate (15) fixedly mounted on the detection tube (4), a sliding plate (19) slidably mounted on the fixed plate (15), a steering shaft (22) fixedly mounted on the sliding plate (19), a support rod rotatably mounted on the steering shaft (22), an exciting hammer (20) for striking the prefabricated wall panel (1) to generate impact elastic waves fixedly mounted on the support rod, two compression springs (21) rotatably connected between the support rod and the sliding plate (19), and an echo detection disk (18) for receiving and detecting rebound waves fixedly mounted on the fixed plate (15) via a telescopic rod.

8. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 7, characterized in that: Two grips (12) are provided on the side of the detection cylinder (4), and a pull-back control handle is fixedly mounted on the support rod.

9. A device for detecting grouting fullness of a prefabricated concrete wall panel according to claim 5, characterized in that: The measuring mechanism comprises a transparent observation window (25) arranged on the detection cylinder (4) for observing changes in the internal state of the detection cylinder (4), and a return air scale (26) for detecting changes in the volume of gas in the detection cylinder (4) is arranged on the transparent observation window (25), and an exhaust pipe is arranged on the detection cylinder (4), and the exhaust pipe is located on the upper part of the fixed plate (31).

10. A method for detecting the grouting fullness of a prefabricated concrete wall panel, used in the device for detecting the grouting fullness of a prefabricated concrete wall panel as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. According to the positions of the grouting pipe (3) and the grouting outlet pipe (2) on the grouting sleeve (7) in the prefabricated wall panel (1), the position of the air measuring unit on the detection tube (4) is adjusted, and the air measuring unit is adjusted so that it is fixed on the grouting pipe (3) and the grouting outlet pipe (2), the positioning of the detection tube (4) is completed, and the grouting pipe (3) and the grouting outlet pipe (2) are positioned and blocked; S2, controlling the air injection assembly to start the air in the grouting sleeve (7) through the grouting pipe (3) through the control unit, and detecting the air pressure change at the grouting pipe (2) in real time. If the air pressure change at the grouting pipe (2) is small or no change, it is judged that the grouting fullness of the concrete in the grouting sleeve (7) is high. If the air pressure change is large, it is judged that the grouting fullness of the concrete in the grouting sleeve (7) is low and there are many holes in it. S3, controlling the gas injection component to start injecting gas into the grouting pipe (3) through the control unit, and measuring the volume of the injected gas, collecting the gas discharged through the grouting pipe (2) through the gas return component, and observing the volume of the collected gas, so that the grouting fullness of the concrete in the grouting sleeve (7) can be detected according to the change between the collected gas volume and the injected gas volume, and the actual grouting fullness can be calculated; S4. The vibration hammer (20) is controlled by the impact detection unit to impact the prefabricated wall panel (1) outside the grouting sleeve (7) at different heights and angles, so that impact elastic waves are generated in the prefabricated wall panel (1) and the grouting sleeve (7). At the same time, the rebound wave generated by the impact elastic wave is received, and the fullness of the concrete in the grouting sleeve (7) is judged according to the change in the rebound wave receiving time.

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