A crack detection device for construction concrete construction

Abstract

The application discloses a crack detection device for building concrete construction, which comprises a cart, and a crack pre-detector is installed on the bottom plate of the cart; the crack pre-detector comprises a suspension support, an electromagnetic relay is installed on the suspension support, an electromagnet is installed at the center position of the electromagnetic relay, an integrated frame is arranged in parallel below the suspension support, and an armature and a strong spring are installed between the suspension support and the integrated frame; a plurality of crack wall breakers in array distribution are installed on the suspension support and the integrated frame; when the electromagnetic relay loses electricity, the strong spring drives the integrated frame and the limiting sliding pipe part of the plurality of crack wall breakers to rapidly impact the concrete floor; when the electromagnetic relay is electrified, the electromagnet attracts the armature, and the integrated frame and the limiting sliding pipe part of the plurality of crack wall breakers are moved upward. The crack wall breaker can reveal the hidden seam existing on the floor surface, solves the problem that the hidden seam surface is intact and is difficult to be directly observed, and thus greatly reduces the construction period required for concrete crack detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a crack detection device for building concrete construction. BACKGROUND

[0002] The cracks in the building concrete floor can reduce the strength and stiffness of the concrete structure, affect its carrying capacity, and may cause local collapse of the building and other serious safety accidents. The cracks can also reduce the durability of the concrete, accelerate the corrosion of the steel bars, and reduce the service life of the structure. Therefore, concrete crack detection is crucial, which can timely find the existence and development trend of the cracks and provide a basis for structural safety evaluation. After determining the type, width, depth and other parameters of the cracks through detection, targeted repair schemes can be developed. Accurate detection can help prevent further expansion of the cracks, avoid aggravation of the damage, provide data support for engineering quality control, supervise the construction standard, detect the structure damage risk in advance, reduce maintenance costs and safety hazards, prolong the service life of the building, and improve the overall quality and reliability of the concrete structure.

[0003] The popular concrete crack detection methods include visual inspection method, crack width detector measurement method, ultrasonic detection method, etc. The visual inspection method is simple and intuitive but has low precision. The crack width detector can accurately measure the crack width, but cannot detect the depth and direction of the cracks. The ultrasonic detection method has outstanding advantages over other concrete crack detection methods. It can penetrate the concrete, accurately determine the depth and direction of the cracks, is not affected by the surface condition of the cracks, and can comprehensively detect large-volume concrete and complex structures with high detection precision.

[0004] However, the ultrasonic detection method also has certain limitations. Since the dark cracks have perfect surfaces and are difficult to be directly observed, it is difficult for the detection personnel to find the existence of the dark cracks, increasing the detection difficulty. If the concrete surface is to be comprehensively detected by ultrasonic waves, a large amount of detection points need to be detected one by one, which consumes a lot of time and labor cost. In addition, for a large area of concrete floor, the workload of comprehensive ultrasonic detection is huge, which may prolong the engineering progress. SUMMARY

[0005] The present application aims to provide a crack detection device capable of comprehensively pre-detecting the concrete floor to solve the problem that the dark cracks have perfect surfaces and are difficult to be directly observed, and to reveal the existence of the dark cracks on the floor surface, greatly reducing the construction period required for concrete crack detection.

[0006] Technical scheme: The crack detection device for building concrete construction comprises a cart, and a crack pre-detection device is installed on the bottom plate of the cart.

[0007] The crack pre-checker comprises a hanging bracket, an electromagnetic relay mounted on the hanging bracket, an electromagnet mounted at the center of the electromagnetic relay, an integrated bracket arranged in parallel below the hanging bracket, an armature mounted on the upper end face of the integrated bracket and matched with the electromagnet, a strong spring sleeved on the armature and fixedly connected with the integrated bracket and the hanging bracket at both ends;

[0008] A plurality of crack wall breakers arranged in an array are mounted on the hanging bracket and the integrated bracket, the crack wall breaker comprises a flow splitting assembly, a pressure storage piston assembly and a piston rod core, the pressure storage piston assembly comprises a piston sleeve, a limiting sliding pipe is coaxially fixed on the upper end of the piston sleeve, and the outer side wall of the flow splitting assembly is limitingly and slidingly connected with the limiting sliding pipe; each limiting sliding pipe is fixed on the integrated bracket, and each flow splitting assembly is fixed on the hanging bracket;

[0009] The piston rod core comprises a flow splitting rod core, the flow splitting rod core is limitingly and slidingly connected in the piston sleeve, a pressure storage cavity is formed between the flow splitting rod core and the piston sleeve, a return spring is arranged in the pressure storage cavity, and both ends of the return spring are fixedly connected with the top of the pressure storage cavity and the top of the flow splitting rod core; a one-way valve and a pressure relief valve are mounted on the side wall of the piston sleeve and communicate with the pressure storage cavity;

[0010] When the electromagnetic relay loses power, the strong spring drives the integrated bracket and the limiting sliding pipe part of the plurality of crack wall breakers to rapidly impact the concrete terrace; when the electromagnetic relay is powered on, the electromagnet attracts the armature, so that the integrated bracket and the limiting sliding pipe part of the plurality of crack wall breakers move upward.

[0011] Further, the flow splitting assembly comprises a flow splitting cone head, the crack wall breaker further comprises a flow splitting cover, and the flow splitting cone head is opened at the upper portion and closed by the flow splitting cover.

[0012] Further, the flow splitting cone head is fixedly connected with an isolation plate inside, and an airflow cavity is formed between the flow splitting cone head and the isolation plate; an airflow pipe group is arranged in the limiting sliding pipe and located below the airflow cavity;

[0013] The airflow pipe group comprises an airflow main pipe, an airflow end spring sliding rail is fixedly mounted on the airflow main pipe, a pipeline communicating with the airflow cavity is fixed at the bottom of the flow splitting cone head, the upper segment of the airflow main pipe is limitingly and slidingly connected to the outer side wall of the pipeline, and the lower segment of the airflow main pipe can communicate with the exhaust groove arranged in the flow splitting rod core when the flow splitting rod core is reset;

[0014] A flow interception plate is limitingly and slidingly connected inside the airflow end spring sliding rail, the flow interception plate comprises a flow splitting plug plate, an air hole is arranged at the outer side end of the flow splitting plug plate, and the air hole of the outer side end communicates with the upper and lower segments of the airflow main pipe in the initial state;

[0015] A gas supply pipeline is connected to the flow splitting cover;

[0016] When the limiting sliding pipe portion is impacted downward, if a crack appears on the concrete floor, the piston rod core smoothly enters the crack, no longer pressing the gas inside the storage cavity. At this time, the gas flowing into the gas flow cavity is discharged into the exhaust groove in the shunt rod core through the gas flow main pipe, and is blown into the concrete crack through the exhaust groove to remove the debris inside the crack.

[0017] Further, the gas supply pipeline on the crack breaking device is connected to the gas supply main pipe, and the gas supply main pipe is connected to the gas source.

[0018] Further, the inner side of the shunt plug plate is fixedly connected with a front end magnetic block, and the inner side of the shunt plug plate is also provided with a gas passage;

[0019] The gas flow pipe group further comprises a gas flow branch pipe and a shunt gas pipe. The gas flow branch pipe is fixedly connected to the inner side of the upper side wall of the gas flow end spring sliding rail, and the shunt gas pipe is fixedly connected to the lower side wall of the gas flow end spring sliding rail. The other end of the shunt gas pipe is fixedly connected to the lower section of the water passage pipe, and the bottom of the shunt cone head is fixedly connected with another pipeline connected to the gas flow cavity. The upper section of the gas flow branch pipe is limitingly and slidingly connected to the outer side wall of the other pipeline;

[0020] The shunt cone head and the isolation plate further form a resin storage cavity and a water storage cavity. The limiting sliding pipe further comprises a water flow pipe group and a resin feeding pipe group. The water flow pipe group is located below the water storage cavity, and the resin feeding pipe group is located below the resin storage cavity;

[0021] The water flow pipe group comprises a water passage pipe, and the water flow end spring sliding rail is installed on the water passage pipe. The bottom of the water passage pipe is limitingly and slidingly connected to the outer side wall of the pipeline connected to the water storage cavity. When the shunt rod core is reset, the bottom of the water passage pipe can be connected to the drainage groove in the shunt rod core;

[0022] The resin feeding pipe group comprises a resin discharge pipe, and the resin end spring sliding rail is installed on the resin discharge pipe. The bottom of the resin discharge pipe is limitingly and slidingly connected to the outer side wall of the pipeline connected to the resin storage cavity. When the shunt rod core is reset, the bottom of the resin discharge pipe can be connected to the resin discharge groove in the shunt rod core;

[0023] The inner limiting sliding connection of the resin end band spring sliding rail and the water flow end band spring sliding rail has a shunt plate, the shunt plate includes a material cutting valve plate, the inner end of the material cutting valve plate is fixedly connected with an inner magnetic block, and a feeding through hole is arranged on the material cutting valve plate and close to the inner magnetic block; when the shunt plug plate moves to the outermost side along the air flow end band spring sliding rail, the air holes at the inner side communicate the shunt air pipe with the air flow branch pipe, the two feeding through holes are in communication with the resin discharge pipe and the water pipe respectively, and the air holes at the outer side block the upper and lower air flow main pipes; the top middle position of the shunt rod core is fixedly connected with a sliding rod, the sliding rod is limitingly and slidingly connected to the top middle position of the piston sleeve, the top of the sliding rod is fixedly connected with a sliding magnetic block, and the sliding magnetic block is used in cooperation with the front end magnetic block and the two inner magnetic blocks; the shunt plate and the shunt plug plate are driven to move outward on the corresponding band spring sliding rail, and the on-off state of the corresponding pipeline is changed.

[0024] The shunt cover is further connected with water supply and resin particle supply pipelines.

[0025] Further, the outer side of the shunt plug plate is fixedly connected with a wedge-shaped tail plate, the outer end of the material cutting valve plate is fixedly connected with an outer wedge-shaped block, and the lower side wall of the shunt cone head is fixedly connected with three circumferentially arrayed reset wedge-shaped blocks, which are used in cooperation with the two outer wedge-shaped blocks and the wedge-shaped tail plate; when the limiting sliding pipe moves upward, the two shunt plates and the shunt plug plate are reset together.

[0026] Further, the water in the water storage cavity is colored water mixed with pigments. The colored water and the resin gel can form a mark color at the dark seam, and the detection personnel can more directly observe the dark seam area according to the mark color, thereby avoiding the situation that the concrete crack detection is missed.

[0027] Further, the water supply and resin particle supply pipelines of the crack wall breaking devices are connected through the main pipeline, so as to provide water source and resin particles for each crack wall breaking device.

[0028] Further, the inner side wall of the band spring sliding rail is arranged with a plurality of linearly arrayed clamping springs, which are used for avoiding displacement of the shunt plate and the shunt plug plate caused by vibration during crack detection.

[0029] Further, the crack wall breaking devices are arranged in a rectangular array.

[0030] Advantages: Compared with the prior art, the present application has the following advantages: the present application can solve the problem that the dark seam surface is intact and difficult to be directly observed, and the crack wall breaking device can reveal the dark seam existing on the terrace surface, thereby greatly reducing the construction period required for concrete crack detection. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 and Figure 2 are structural schematic diagrams of the crack detection device from different perspectives.

[0032] Figure 3 is the structural schematic diagram of the crack pre-checker in the embodiment of the present application;

[0033] Figure 4 is the isometric side sectional view of the crack pre-checker in the embodiment of the present application;

[0034] Figure 5 is the structural schematic diagram of the crack pre-checker in the embodiment of the present application;

[0035] Figure 6 is the structural schematic diagram of the crack pre-checker in the embodiment of the present application;

[0036] Figure 7 is the internal structural schematic diagram of the shunt assembly in the embodiment of the present application;

[0037] Figure 8 is the top view of the crack pre-checker in the embodiment of the present application;

[0038] Figure 9 is the isometric side sectional view of A-A of Figure 8 ;

[0039] Figure 10 is the structural schematic diagram of the air flow pipe group, water flow pipe group, resin supply pipe group, intercepting plate and shunt plate in the embodiment of the present application;

[0040] Figure 11 is the exploded view of Figure 10 ;

[0041] Figure 12 is the cooperation structural schematic diagram of the reset wedge block and outer wedge block, wedge tail plate in the embodiment of the present application;

[0042] Figure 13 is the structural schematic diagram of the air flow end spring sliding rail and intercepting plate in the embodiment of the present application;

[0043] Figure 14 is the top view of Figure 6 ;

[0044] Figure 15 is the sectional view of B-B of Figure 14 ;

[0045] Figure 16 is the schematic diagram of the clamp spring on the air flow end spring sliding rail in the embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the drawings.

[0047] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated herein and constitute a part of this application. Figures 1 to 16The reference signs in the drawings are as follows:

[0048] 1, trolley; 2, bottom plate; 3, crack pre-detector;

[0049] 31, suspension bracket; 32, integrated bracket; 33, electromagnetic relay; 34, crack wall breaker; 35, electromagnet; 36, armature; 37, strong spring;

[0050] 341, shunt cover; 342, shunt assembly; 343, limit sliding pipe; 344, pressure storage piston assembly; 345, piston rod core; 346, pressure relief valve; 347, one-way valve; 348, reset spring; 349, air flow pipe group; 3410, water flow pipe group; 3411, resin supply pipe group; 3412, intercepting plate; 3413, shunt plate;

[0051] 3421, shunt cone; 3422, isolation plate; 3423, air flow cavity; 3424, resin storage cavity; 3425, water storage cavity; 3426, reset wedge-shaped block;

[0052] 3441, piston sleeve; 3442, pressure storage cavity;

[0053] 3451, shunt rod core; 3452, sliding rod; 3453, sliding magnetic block;

[0054] 3491, air flow branch pipe; 3492, air flow main pipe; 3493, air flow end spring sliding rail; 3494, shunt air pipe;

[0055] 34101, water flow pipe; 34102, water flow end spring sliding rail;

[0056] 34111, resin discharge pipe; 34112, resin end spring sliding rail;

[0057] 34121, shunt plug plate; 34122, air hole; 34123, wedge-shaped tail plate; 34124, front end magnetic block;

[0058] 34131, outer wedge-shaped block; 34132, intercepting valve plate; 34133, supply hole; 34134, inner magnetic block.

[0059] Example 1

[0060] As Figures 1 to 5 shown, this example 1 provides a crack detection device for building concrete construction, which comprises a trolley 1, and a bottom plate 2 is fixedly installed at the bottom of the trolley 1, and a crack pre-detector 3 is installed at the top middle position of the bottom plate 2.

[0061] The crack detection device 3 includes a suspension bracket 31 fixed on the base plate 2. An electromagnetic relay 33 is installed at the top center of the suspension bracket 31, and an electromagnet 35 is installed at the center of the electromagnetic relay 33. An integrated frame 32 is arranged parallel to the bottom of the suspension bracket 31. An armature 36 that cooperates with the electromagnet 35 is fixedly installed at the center of the upper end face of the integrated frame 32. A strong spring 37 is sleeved on the armature 36. One end of the strong spring 37 is fixedly connected to the upper end face of the integrated frame 32, and the other end is fixedly connected to the bottom of the suspension bracket 31.

[0062] Several crack breakers 34 arranged in a rectangular array are installed on the suspension bracket 31 and the integrated frame 32.

[0063] like Figures 6 to 9 As shown, the crack-breaking device 34 includes a flow-diverting assembly 342, a pressure-storing piston assembly 344, and a piston rod core 345. The pressure-storing piston assembly 344 includes a piston sleeve 3441. A limiting slide tube 343 (with a stepped surface on its outer circumference for axial limiting) is coaxially fixed to the upper end of the piston sleeve 3441. The bottom of the outer wall of the flow-diverting assembly 342 is slidably connected to the limiting slide tube 343. Each limiting slide tube 343 is fixed on the integrated frame 32, and each flow-diverting assembly 342 is fixed on the suspension bracket 31.

[0064] The piston rod core 345 includes a flow divider core 3451, which is slidably connected to the piston sleeve 3441. A pressure storage chamber 3442 is located between the flow divider core 3451 and the piston sleeve 3441. A return spring 348 is installed within the pressure storage chamber 3442, with its two ends fixedly connected to the top of the pressure storage chamber 3442 and the top of the flow divider core 3451, respectively. A one-way valve 347 is installed on the left side wall of the piston sleeve 3441, and a pressure relief valve 346 is installed on the right side wall. Both the one-way valve 347 and the pressure relief valve 346 are connected to the pressure storage chamber 3442.

[0065] The trolley 1 is moved across the concrete floor. During its movement, it pauses for several seconds at each detection area to allow the crack pre-inspector 3 time to detect cracks. Initially, the electromagnet 35 engages the armature 36. When the trolley 1 reaches the target area, the external controller de-energizes the coil of the electromagnetic relay 33, causing the electromagnet 35 to lose its magnetic attraction. The powerful spring 37 then drives the integrated frame 32 and the limiting slide tubes 343 of several crack breakers 34 to rapidly impact the concrete floor.

[0066] Driven by the reaction force of the concrete floor, the piston rod core 345 compresses the gas in the pressure storage chamber 3442. When the gas pressure in the pressure storage chamber 3442 reaches the discharge threshold of the pressure relief valve 346, the pressure relief valve 346 opens, and the gas is discharged through the pressure relief valve 346, allowing the diverter rod core 3451 to be completely drawn into the pressure storage chamber 3442. The compressed gas in the pressure storage chamber 3442 is used to determine whether there are cracks in the concrete floor. When the compressed gas pressure reaches the discharge threshold of the pressure relief valve 346, but the diverter rod core 3451 is still moving upward, it is determined that there are no cracks in the concrete floor at that location. At this time, the gas in the pressure storage chamber 3442 is released by venting through the pressure relief valve 346, which can prevent the diverter rod core 3451 from being damaged due to excessive force, and at the same time protect the intact concrete floor from damage caused by the impact of the diverter rod core 3451.

[0067] Once a crack pre-inspection is completed in a detection area, the external controller energizes the coil of the electromagnetic relay 33, restoring the magnetic attraction of the electromagnet 35. The electromagnet 35 attracts the armature 36, and the integrated frame 32 is moved upward, thereby causing the limiting slide tubes 343 of several crack breakers 34 to move upward together.

[0068] Example 2

[0069] like Figures 6 to 11 As shown, this embodiment 2 provides another technical solution based on embodiment 1.

[0070] The crack breaker 34 also includes a diversion cover 341, and the diversion assembly 342 includes a diversion cone 3421, which has an opening at the top and is closed by the diversion cover 341.

[0071] An isolation plate 3422 is fixedly connected inside the flow splitter cone 3421, and an airflow cavity 3423 is formed between the flow splitter cone 3421 and the isolation plate 3422. An airflow tube assembly 349 is provided in the limiting slide tube 343, and the airflow tube assembly 349 is located below the airflow cavity 3423.

[0072] The airflow assembly 349 includes a main airflow pipe 3492, with a spring-loaded airflow end slide rail 3493 fixedly installed at the middle position of the main airflow pipe 3492. A pipe connecting to the airflow chamber 3423 is fixedly installed at the bottom of the diverter cone 3421. The upper section of the main airflow pipe 3492 is slidably connected to the outer wall of the pipe, and the lower section of the main airflow pipe 3492 can communicate with the exhaust groove opened inside the diverter rod core 3451. Figure 15 As shown.

[0073] Combination Figures 13 to 16The inner side wall of the airflow end spring sliding rail 3493 is provided with a plurality of clamping springs, and the inner side of the airflow end spring sliding rail 3493 is limitedly and slidingly connected with a flow cutoff plate 3412. The flow cutoff plate 3412 comprises a flow distribution plug plate 34121, and the outer side end of the flow distribution plug plate 34121 is provided with a gas passage hole 34122. In the initial state, the gas passage hole 34122 at the outer side end is communicated with the upper and lower two sections of the airflow main pipe 3492.

[0074] The flow cutoff plate 3412 is connected with a gas supply pipeline, and the gas supply pipeline on the crack breaking wall 34 is connected to a gas supply main pipe, and the gas supply main pipe is connected with a gas source.

[0075] When the limiting sliding pipe 343 part is impacted downward, if the concrete ground has a crack, the piston rod core 345 smoothly enters the crack, and no longer squeezes the gas in the pressure storage cavity 3442. At this time, the gas introduced into the airflow cavity 3423 is discharged into the exhaust groove in the flow cutoff rod core 3451 through the airflow main pipe 3492, and is blown into the concrete crack through the exhaust groove. Through the blown airflow, the impurities existing in the crack are removed, so as to avoid that the impurities affect the crack detection accuracy in the subsequent formal detection.

[0076] Embodiment 3

[0077] As shown in Figures 6 to 16 , another technical solution is provided in the embodiment 3 on the basis of the embodiment 2.

[0078] The inner side of the flow cutoff plug plate 34121 is fixedly connected with a front end magnetic block 34124, and the outer side of the flow cutoff plug plate 34121 is fixedly connected with a wedge-shaped tail plate 34123. The inner side end of the flow cutoff plug plate 34121 is also provided with a gas passage hole 34122, that is, the flow cutoff plug plate 34121 has two gas passage holes 34122.

[0079] The airflow pipe group 349 further comprises an airflow branch pipe 3491 and a flow distribution gas pipe 3494. The airflow branch pipe 3491 is fixedly connected to the inner side of the upper side wall of the airflow end spring sliding rail 3493, and the flow distribution gas pipe 3494 is fixedly connected to the lower side wall of the airflow end spring sliding rail 3493. The other end of the flow distribution gas pipe 3494 is fixedly connected to the lower section of the water passage pipe 34101. The other pipe of the flow distribution gas pipe 3494 is fixedly connected to the bottom of the flow distribution plug plate 34121, and the upper section of the airflow branch pipe 3491 is limitedly and slidingly connected to the outer side wall of the other pipe. The flow distribution gas pipe 3494 and the airflow branch pipe 3491 can be communicated with each other through the gas passage hole 34122 at the inner side end.

[0080] The resin storage cavity 3424 and the water storage cavity 3425 are further formed between the flow distribution cone head 3421 and the isolation plate 3422. The water flow pipe group 3410 and the resin feeding pipe group 3411 are further arranged in the limiting sliding pipe 343, the water flow pipe group 3410 is located below the water storage cavity 3425, and the resin feeding pipe group 3411 is located below the resin storage cavity 3424.

[0081] The water flow pipe group 3410 comprises a water flow pipe 34101, a water flow end spring-loaded sliding rail 34102 is arranged at the middle position of the water flow pipe 34101, a pipeline communicating with the water storage cavity 3425 is fixed at the bottom of the flow distribution cone head 3421, the top of the water flow pipe 34101 is limitingly and slidingly connected to the outer sidewall of the pipeline, and the bottom of the water flow pipe 34101 can communicate with a water drainage groove arranged in the flow distribution rod core 3451.

[0082] The resin feeding pipe group 3411 comprises a resin discharge pipe 34111, a resin end spring-loaded sliding rail 34112 is arranged at the middle position of the resin discharge pipe 34111, a pipeline communicating with the resin storage cavity 3424 is fixed at the bottom of the flow distribution cone head 3421, the top of the resin discharge pipe 34111 is limitingly and slidingly connected to the outer sidewall of the pipeline, and the bottom of the resin discharge pipe 34111 can communicate with a resin discharge groove arranged in the flow distribution rod core 3451.

[0083] A plurality of linear arrayed snap springs (hemispherical structures embedded in the inner wall of the spring-loaded sliding rail by springs) are arranged on the inner walls of the resin end spring-loaded sliding rail 34112 and the water flow end spring-loaded sliding rail 34102, and the flow distribution plate 3413 is limitingly and slidingly connected to the inner walls of the resin end spring-loaded sliding rail 34112 and the water flow end spring-loaded sliding rail 34102. The flow distribution plate 3413 comprises a material cutting valve plate 34132, an outer wedge-shaped block 34131 is fixedly connected to the outer end of the material cutting valve plate 34132, an inner magnetic block 34134 is fixedly connected to the inner end of the material cutting valve plate 34132, and a feeding through hole 34133 is arranged at the position of the material cutting valve plate 34132 close to the inner magnetic block 34134.

[0084] The top middle position of the flow distribution rod core 3451 is fixedly connected with a sliding rod 3452, the sliding rod 3452 is limitingly and slidingly connected to the top middle position of the piston sleeve 3441, a sliding magnetic block 3453 is fixedly connected to the top of the sliding rod 3452, and the sliding magnetic block 3453 cooperates with the front end magnetic block 34124 and the two inner magnetic blocks 34134 respectively.

[0085] When the shunt rod core 3451 contacts the concrete of the joint surface, as the gas inside the pressure storage cavity 3442 is squeezed, its pressure gradually increases, the pressure acting on the top of the shunt rod core 3451 gradually increases, thereby increasing the pressure of the shunt rod core 3451 acting on the concrete surface, and further breaking the concrete of the joint surface. When the shunt rod core 3451 successfully breaks the concrete of the joint, the broken concrete pieces fall into the joint, the shunt rod core 3451 penetrates into the joint, the reset spring 348 drives the shunt rod core 3451 to extend again, the shunt rod core 3451 moves downward relative to the piston sleeve 3441, at this time the sliding magnetic block 3453 passes through the two inner magnetic blocks 34134 and the front magnetic block 34124 twice (when breaking the concrete layer of the joint surface, the shunt rod core 3451 is first pressed upward, the first time drives the two inner magnetic blocks 34134 and the front magnetic block 34124 to expand outward; when the concrete joint is broken, the shunt rod core 3451 is reset under the action of the reset spring 348, at this time the second time passes through the two inner magnetic blocks 34134 and the front magnetic block 34124; the purpose of passing through twice is that when the front magnetic block 34124 is passed through the first time, the shutoff plate 3412 expands outward, the air vent hole 34122 located at the outer end is no longer connected to the airflow main pipe 3492, and the airflow is no longer discharged from the shunt rod core 3451, and when the second time passes, the air vent hole 34122 located at the inner end is connected to the airflow branch pipe 3491, and the airflow enters the water pipe 34101; as for the two inner magnetic blocks 34134, the feeding through hole 34133 is connected to the resin discharge pipe 34111 and the water pipe 34101 respectively when the second time passes, and when the shunt rod core 3451 is completely reset under the action of the reset spring 348, that is, after the groove on the piston sleeve 3441 is connected to the groove on the shunt rod core 3451, the resin and water are discharged from the shunt rod core 3451), the two shunt plates 3413 and the shutoff plate 3412 are pushed to the outermost side by the sliding magnetic block 3453, at this time the air vent hole 34122 located at the inner end is connected to the airflow branch pipe 3491, and the two feeding through holes 34133 are connected to the resin discharge pipe 34111 and the water pipe 34101 respectively, the water and the resin stored in the water storage cavity 3425 and the resin storage cavity 3424 are discharged from the shunt cone 3421, and are discharged through the water pipe 34101 and the resin discharge pipe 34111 and the water discharge groove and the resin discharge groove on the shunt rod core 3451 respectively, wherein the water stored in the water storage cavity 3425 is colored water mixed with pigment, and the colored water and the resin particles are discharged into the crack together, and the airflow is discharged into the water pipe 34101 through the airflow branch pipe 3491 and the shunt air pipe 3494.

[0086] The purpose of the two inner magnetic blocks 34134 and the front end magnetic block 34124 is to distinguish between the case of a good surface and the case of a surface with obvious cracks. If the surface is completely, the shunt rod core 3451 will not reset and will only pass through the two inner magnetic blocks 34134 and the front end magnetic block 34124 once. If there are obvious cracks on the surface, the shunt rod core 3451 will be directly inserted into the crack position and will not pass through the inner magnetic block 34134 and the front end magnetic block 34124.

[0087] The snap spring set on the water flow end belt spring sliding rail 34102 and the resin end belt spring sliding rail 34112 can prevent the movement of the shutoff plate 3412 and the shunt plate 3413 caused by vibration during the impact of the crack wall breaker 34 on the concrete surface. The spring force makes the shutoff plate 3412 and the shunt plate 3413 tightly pressed inside the sliding rail, avoiding the displacement of the shutoff plate 3412 and the shunt plate 3413 caused by vibration during pre-checking, and preventing the leakage of air flow, water and resin.

[0088] The lower side wall of the shunt cone head 3421 is fixedly connected with three circumferentially arrayed reset wedge blocks 3426, which are used in cooperation with the two outer wedge blocks 34131 and the wedge tail plate 34123. When a detection area is completed, the external controller controls the electromagnetic relay 33 coil to be powered, the electromagnet 35 restores the magnetic attraction and attracts the armature 36, the integrated frame 32 is driven to move upwards, and in turn drives several limiting sliding pipes 343 to move upwards. During the upward movement of the limiting sliding pipe 343, the reset wedge block 3426 extrudes the two outer wedge blocks 34131 and the wedge tail plate 34123, so that the two shunt plates 3413 and the shutoff plate 3412 are reset together.

[0089] At the same time, the shunt cover 341 is also connected with water supply and resin particle supply pipelines, and the water supply and resin particle supply pipelines of several crack wall breakers 34 are connected through the main pipeline to provide water source and resin particles to each crack wall breaker 34.

[0090] Working principle:

[0091] Before the crack detection of the concrete floor, the device is used for crack pre-detection. The trolley 1 is pushed to move on the concrete floor. During the movement of the trolley 1, every time the trolley 1 reaches a detection area, the trolley 1 stops at the detection area for several seconds to provide crack pre-detection time for the crack pre-detection device 3. When the trolley 1 reaches the target area, the external controller controls the coil of the electromagnetic relay 33 to be powered off, the electromagnet 35 loses the magnetic attraction force, and the strong spring 37 drives the integrated frame 32 and the limiting slide pipe 343 of the crack breaker 34 to quickly impact the concrete floor. The piston rod core 345 is driven by the reaction force of the concrete floor to extrude the gas in the pressure storage cavity 3442. When the gas pressure in the pressure storage cavity 3442 reaches the discharge threshold of the pressure relief valve 346, the pressure relief valve 346 is opened, the gas is discharged through the pressure relief valve 346, and the shunt rod core 3451 is completely received in the pressure storage cavity 3442. The compressed gas in the pressure storage cavity 3442 is used to determine whether the concrete floor has cracks. When the gas pressure of the compressed gas reaches the discharge threshold of the pressure relief valve 346, but the shunt rod core 3451 is still in the upward movement trend, it is determined that the concrete floor at the position has no cracks. At this time, the gas in the pressure storage cavity 3442 is discharged through the pressure relief valve 346 to relieve the pressure, which can prevent the shunt rod core 3451 from being damaged due to excessive force, and can also protect the intact concrete floor from being damaged by the impact of the shunt rod core 3451.

[0092] Meanwhile, during the upward movement of the shunt rod core 3451, the slide rod 3452 drives the slide magnetic block 3453 to move upward together. When the slide magnetic block 3453 passes through the front magnetic block 34124, the slide magnetic block 3453 pushes the front magnetic block 34124 to move outward a distance because the slide magnetic block 3453 and the front magnetic block 34124 are opposite to each other in the same magnetic pole. At this time, the air hole 34122 originally at the outer end is away from the lower side of the air flow main pipe 3492, the pipeline connected with the air flow main pipe 3492 is cut off by the shunt plug plate 34121, and the gas cannot be sprayed out of the exhaust groove on the shunt rod core 3451, which reduces the use amount of the gas. Meanwhile, when the slide magnetic block 3453 passes through the two inner magnetic blocks 34134, the slide magnetic block 3453 and the inner magnetic blocks 34134 are opposite to each other in the same magnetic pole, so the slide magnetic block 3453 pushes the two shunt plates 3413 to move outward a distance. However, the slide magnetic block 3453 acts on the two shunt plates 3413 for a short time, so the feeding through hole 34133 cannot come to the lower side of the resin discharge pipe 34111 and the water pipe 34101, and the water pipe 34101 and the resin discharge pipe 34111 are still in the blocking state.

[0093] When the limit sliding tube 343 is impacted downward, if the concrete surface has cracks, the piston rod core 345 will smoothly enter the cracks, and no longer squeeze the gas inside the storage cavity 3442. At this time, the gas flowing into the airflow cavity 3423 is discharged into the exhaust groove in the shunt rod core 3451 through the airflow main tube 3492, and is blown into the concrete cracks through the exhaust groove. Through the blowing airflow, the debris inside the crack is removed, avoiding the influence of debris on the crack detection accuracy during subsequent formal detection.

[0094] The concrete strength of the hidden seam surface is much lower than that of the complete concrete surface. When the shunt rod core 3451 contacts the concrete surface of the hidden seam, as the pressure of the gas inside the storage cavity 3442 increases due to squeezing, the pressure acting on the top of the shunt rod core 3451 gradually increases, thereby increasing the pressure of the shunt rod core 3451 acting on the concrete surface, and further breaking the concrete surface of the hidden seam. When the shunt rod core 3451 successfully breaks the concrete at the hidden seam, the broken concrete debris falls into the inside of the concrete hidden seam, and the shunt rod core 3451 is inserted into the inside of the hidden seam. The return spring 348 drives the shunt rod core 3451 to extend again, and the shunt rod core 3451 moves downward relative to the piston sleeve 3441. At this time, the sliding magnetic block 3453 passes through the two inner magnetic blocks 34134 and the front magnetic block 34124 twice, and the two shunt plates 3413 and the cutoff plate 3412 are pushed to the outermost side by the sliding magnetic block 3453. At this time, the air vent hole 34122 at the inner end is in communication with the airflow branch pipe 3491, and the two feed-through holes 34133 are respectively in communication with the resin discharge pipe 34111 and the water supply pipe 34101. The water stored in the water storage cavity 3425 and the resin stored in the resin storage cavity 3424 are discharged from the shunt cone 3421 and discharged through the water supply pipe 34101 and the resin discharge pipe 34111 and the drainage groove and the resin discharge groove on the shunt rod core 3451, respectively. The water stored in the water storage cavity 3425 is colored water mixed with pigment. The colored water and the resin particles will be mixed and discharged into the cracks at the same time. The airflow is discharged through the airflow branch pipe 3491 and the shunt air pipe 3494 into the water supply pipe 34101. Under the action of the airflow, the resin particles are discharged more dispersedly. The airflow also blows the resin on the broken concrete debris, so that it falls on the bottom and around the concrete debris. After the resin particles contact with the water, they will be quickly absorbed by the resin. At the same time, the resin expands rapidly, thereby wrapping the concrete debris inside. The expanded resin gel overflows from the broken concrete surface, making the outside of the concrete present a bright and clear mark color. The detection personnel can more intuitively observe the hidden seam area according to the mark color, thereby avoiding the situation of missing detection of the concrete cracks.

[0095] When a detection area is completed, the external controller controls the electromagnetic relay 33 coil to be powered, the electromagnet 35 restores the magnetic attraction and attracts the armature 36, the integrated frame 32 is driven to move up, and then drives several limiting sliding pipes 343 to move up together. In the process of moving up the limiting sliding pipe 343, the reset wedge block 3426 extrudes two outer wedge blocks 34131 and the wedge tail plate 34123, so that the two shunt plates 3413 and the cut-off plate 3412 are reset together. After all the detection areas are completed, the detection personnel can identify the dark seam area according to the mark color, and then the detection personnel uses a hook to take out the resin gel from the dark seam. Since the resin gel wraps the concrete fragments inside, when the resin gel is taken out, the concrete fragments can be taken out together, avoiding the influence of the concrete fragments on the detection of the concrete cracks in the subsequent detection process.

Claims

1. A crack detection device for concrete construction, comprising a trolley (1), characterized in that, A crack detector (3) is installed on the bottom plate (2) of the trolley (1); The crack detection device (3) includes a suspension bracket (31), an electromagnetic relay (33) is installed on the suspension bracket (31), an electromagnet (35) is installed at the center of the electromagnetic relay (33), an integrated frame (32) is arranged parallel below the suspension bracket (31), an armature (36) that cooperates with the electromagnet (35) is installed on the upper end face of the integrated frame (32), a strong spring (37) is sleeved on the armature (36), and the two ends of the strong spring (37) are fixedly connected to the integrated frame (32) and the suspension bracket (31) respectively. A number of crack breakers (34) arranged in an array are installed on the suspension bracket (31) and the integrated frame (32). Each crack breaker (34) includes a flow diversion assembly (342), a pressure storage piston assembly (344), and a piston rod core (345). The pressure storage piston assembly (344) includes a piston sleeve (3441). A limiting slide tube (343) is coaxially fixed at the upper end of the piston sleeve (3441). The bottom of the outer side wall of the flow diversion assembly (342) is slidably connected to the limiting slide tube (343). Each limiting slide tube (343) is fixed on the integrated frame (32), and each flow diversion assembly (342) is fixed on the suspension bracket (31). The piston rod core (345) includes a flow divider core (3451), which is slidably connected to the piston sleeve (3441). There is a pressure storage chamber (3442) between the flow divider core (3451) and the piston sleeve (3441). A return spring (348) is provided in the pressure storage chamber (3442). The two ends of the return spring (348) are fixedly connected to the top of the pressure storage chamber (3442) and the top of the flow divider core (3451), respectively. A one-way valve (347) and a pressure relief valve (346) are installed on the side wall of the piston sleeve (3441). Both the one-way valve (347) and the pressure relief valve (346) are connected to the pressure storage chamber (3442). When the electromagnetic relay (33) is de-energized, the powerful spring (37) drives the integrated frame (32) and the limiting slide tubes (343) of several crack breakers (34) to quickly impact the concrete floor; when the electromagnetic relay (33) is energized, the electromagnet (35) attracts the armature (36), causing the limiting slide tubes (343) of the integrated frame (32) and several crack breakers (34) to move upward.

2. The crack detection device for building concrete construction according to claim 1, characterized in that, The diversion assembly (342) includes a diversion cone (3421), and the crack breaker (34) also includes a diversion cover (341), the upper part of which is open and closed by the diversion cover (341).

3. The crack detection device for building concrete construction according to claim 2, characterized in that, An isolation plate (3422) is fixedly connected inside the flow splitter cone (3421), and an airflow cavity (3423) is formed between the flow splitter cone (3421) and the isolation plate (3422); an airflow tube assembly (349) is provided in the limiting slide tube (343), and the airflow tube assembly (349) is located below the airflow cavity (3423); The airflow pipe assembly (349) includes an airflow main pipe (3492), on which an airflow end spring slide rail (3493) is fixedly installed. The bottom of the diverter cone (3421) is fixed with a pipe that connects to the airflow chamber (3423). The upper section of the airflow main pipe (3492) is limited and slidably connected to the outer wall of the pipe. When the diverter rod core (3451) is reset, the lower section of the airflow main pipe (3492) can communicate with the exhaust groove opened in the diverter rod core (3451). The airflow end spring slide rail (3493) is internally limited and slidably connected to a flow cut-off plate (3412). The flow cut-off plate (3412) includes a flow divider plate (34121). The outer end of the flow divider plate (34121) is provided with a vent (34122). In the initial state, the vent (34122) at the outer end is connected to the upper and lower airflow main pipes (3492). An air supply pipe is connected to the diversion cover (341); When the limiting slide tube (343) impacts downwards, if a crack appears in the concrete floor, the piston rod core (345) smoothly enters the crack and no longer compresses the gas inside the pressure storage chamber (3442). At this time, the gas introduced into the airflow chamber (3423) is discharged into the exhaust groove in the diverting rod core (3451) through the airflow main pipe (3492), and blown into the concrete crack through the exhaust groove to remove the debris inside the crack.

4. The crack detection device for building concrete construction according to claim 3, characterized in that, The gas supply pipes on several crack breakers (34) are connected to the main gas supply pipe, which is connected to the gas source.

5. The crack detection device for building concrete construction according to claim 3 or 4, characterized in that, The inner side of the flow divider plate (34121) is fixedly connected to the front magnetic block (34124), and the inner end of the flow divider plate (34121) is also provided with a vent hole (34122). The airflow pipe assembly (349) also includes an airflow branch pipe (3491) and a split air pipe (3494). The airflow branch pipe (3491) is fixedly connected to the inner side of the upper side wall of the spring-loaded slide rail (3493) at the airflow end, and the split air pipe (3494) is fixedly connected to the lower side wall of the spring-loaded slide rail (3493) at the airflow end. The other end of the split air pipe (3494) is fixedly connected to the lower section of the water pipe (34101). The bottom of the split cone (3421) is fixed with another pipe that connects to the airflow chamber (3423). The upper section of the airflow branch pipe (3491) is limited and slidably connected to the outer side wall of the other pipe. A resin storage chamber (3424) and a water storage chamber (3425) are also formed between the diversion cone (3421) and the isolation plate (3422); a water flow pipe assembly (3410) and a resin supply pipe assembly (3411) are also provided in the limiting slide tube (343), with the water flow pipe assembly (3410) located below the water storage chamber (3425) and the resin supply pipe assembly (3411) located below the resin storage chamber (3424); The water flow pipe assembly (3410) includes a water pipe (34101), on which a water flow end spring slide rail (34102) is installed. The bottom of the diverting cone (3421) is fixed with a pipe that connects to the water storage chamber (3425). The top of the water pipe (34101) is limited and slidably connected to the outer wall of the pipe. When the diverting rod core (3451) is reset, the bottom of the water pipe (34101) can be connected to the drainage groove opened in the diverting rod core (3451). The resin supply pipe assembly (3411) includes a resin discharge pipe (34111), a resin end spring slide rail (34112) is installed on the resin discharge pipe (34111), a pipe connecting the resin storage chamber (3424) is fixed at the bottom of the diverting cone (3421), the top of the resin discharge pipe (34111) is limited and slidably connected to the outer wall of the pipe, and the bottom of the resin discharge pipe (34111) can be connected to the resin discharge groove opened in the diverting rod core (3451) when the diverting rod core (3451) is reset. A flow divider plate (3413) is internally limited and slidably connected to the resin end spring slide rail (34112) and the water flow end spring slide rail (34102). The flow divider plate (3413) includes a material cut-off valve plate (34132). An internal magnetic block (34134) is fixedly connected to the inner end of the material cut-off valve plate (34132). A material supply through hole (34133) is opened on the material cut-off valve plate (34132) near the internal magnetic block (34134). When the flow divider plate (34121) moves to the outermost side along the air flow end spring slide rail (3493), the vent hole (34122) at the inner end connects the flow divider air pipe (3494) and the air flow branch pipe (3491). The two material supply through holes (34133) are respectively connected to the resin outlet. The material pipe (34111) and water pipe (34101) are connected, and the vent hole (34122) at the outer end blocks the upper and lower airflow main pipes (3492); a slide rod (3452) is fixedly connected to the middle position of the top of the diverter rod core (3451), and the slide rod (3452) is limited and slidably connected to the middle position of the top of the piston sleeve (3441). A sliding magnetic block (3453) is fixedly connected to the top of the slide rod (3452), and the sliding magnetic block (3453) is used in conjunction with the front magnetic block (34124) and two internal magnetic blocks (34134) to drive the flow cut-off plate (3412) and the diverter plate (3413) to move outward on the corresponding spring slide rails to change the on / off state of the corresponding pipelines; The diversion cover (341) is also connected to pipes for supplying water and supplying resin particles.

6. The crack detection device for building concrete construction according to claim 5, characterized in that, A wedge-shaped tail plate (34123) is fixedly connected to the outer side of the flow divider plate (34121), an outer wedge block (34131) is fixedly connected to the outer end of the material cut-off valve plate (34132), and three reset wedge blocks (3426) arranged in a circular array are fixedly connected to the lower side wall of the flow divider cone (3421). The reset wedge blocks (3426) are used in conjunction with the two outer wedge blocks (34131) and the wedge-shaped tail plate (34123) respectively. When the limiting slide tube (343) moves upward, the two flow divider plates (3413) and the cut-off plate (3412) are reset together.

7. The crack detection device for building concrete construction according to claim 5, characterized in that, The water in the water storage chamber (3425) is colored water mixed with pigment.

8. The crack detection device for building concrete construction according to claim 5, characterized in that, The water supply and resin particle supply pipes on several crack-breaking blenders (34) are connected to a main pipeline to supply water and resin particles to each crack-breaking blender (34).

9. The crack detection device for building concrete construction according to claim 5, characterized in that, The inner wall of the spring-loaded slide rail is provided with several snap rings arranged in a linear array to prevent the vibration generated during crack detection from causing displacement of the cut-off plate (3412) and the diverter plate (3413).

10. The crack detection device for building concrete construction according to claim 1, characterized in that, Several crack-breaking devices (34) are distributed in a rectangular array.

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