A joint grout leakage detection device for a composite slab support system

Abstract

The present invention discloses a joint leakage detection device for a composite plate support system, which belongs to the technical field of material flow characteristic testing, and includes a test bench and a test frame for quality inspection of prefabricated plates. The top of the test bench is fixedly mounted to the test frame through a plurality of simulated vibrators. The present invention can utilize a batch spraying system through the setting of a spray pipe network and a diversion component to actively create a wetness gradient from front to back at the joint, accurately simulate the humidity difference caused by the operation sequence at the construction site, and reflect the influence of different humidity conditions on the fluidity of the slurry. At the same time, the setting of the overflow trough and the electrical connection component can utilize a contact slurry guide plate and an electrical connection rod to form a conductive overflow detection system to complete the test of the slurry flow characteristics of the joint. The overflow of the slurry to the overflow trough immediately triggers the circuit closure, thereby realizing rapid defect location and synchronously recording the mapping relationship between the wetness gradient and the change in slurry fluidity.

Description

Technical Field

[0001] The present invention relates to the technical field of material flow characteristic testing, and in particular to a joint slurry leakage detection device for a composite plate supporting system. Background Art

[0002] Composite slabs are generally used as temporary support systems to safely, stably and accurately support precast concrete base slabs and ensure that they can withstand their own weight, construction loads and the weight of cast-in-place concrete before the cast-in-place concrete layer is poured and reaches sufficient strength.

[0003] During the jointing process of the composite slab, the dry precast slab will quickly absorb the moisture of the newly poured material, resulting in insufficient hydration near the interface, low strength, easy cracking and even debonding. However, if the joints of the precast slab are moistened with too much water, it is easy to cause the poured concrete to have a flow characteristic of overflowing to the edge, which in turn causes leakage at the joints and makes the jointing process unqualified. Therefore, it is necessary to test the flow characteristics of the grouting material at the joints of the produced precast slabs. When the precast slabs are installed, workers usually bend the steel bars on the precast slabs upward or downward for anchoring according to the on-site construction conditions. However, bending the steel bars that have been cast in the concrete will generate huge local stress near the bending point, which can easily destroy the structural integrity of the precast slab itself and reduce its bearing capacity and durability. At the same time, after the steel bars on the precast slab are bent and anchored, it is easy to affect the shear force transmitted at the composite slab joints, thereby reducing the shear resistance of the joints. Based on the above, a joint leakage detection device for the composite slab support system is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a joint leakage detection device for a composite plate supporting system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for detecting grout leakage in joints of a composite slab support system comprises a test bench and a test frame for quality inspection of prefabricated slabs. The top of the test bench is fixedly mounted to the test frame via a plurality of simulated vibrators. The side walls of the test frame are connected to two symmetrically arranged propulsion motors. The propulsion motors are connected to a lifting seat via a synchronization assembly. The lifting seat is connected to a spray pipe network. The spray pipe network is composed of a plurality of crisscrossing pipes. The spray pipe network is connected to a plurality of diversion assemblies for controlling water flow on the inner side walls of the longitudinal pipes.

[0007] The inner side wall of the test frame is connected to a plurality of retaining seats for positioning and installing prefabricated panels through a joint support frame, a plurality of overflow grooves are provided on the top of the retaining seats on the four sides, and a receiving groove is provided on the top of the retaining seat in the center, a plurality of powered sensors are connected to the inner side wall of the receiving groove, and the powered sensors are connected to an electrical connection component for detecting whether slurry flows into the overflow groove, the inner end surface of the receiving groove is connected to an ultrasonic probe through an ultrasonic generator, and the outer side of the ultrasonic probe is arranged on the inner defect detection component.

[0008] Preferably, the prefabricated plate is provided with a plurality of longitudinally staggered preinstalled steel bars, the prefabricated plate is adapted to the retaining seat, and the joint support frame is adapted to the retaining seat.

[0009] Preferably, the synchronization component includes a main drive gear fixed on the output shaft of the propulsion motor, and both sides of the main drive gear are meshed with synchronization rings. The inner side wall of the synchronization ring is fixedly connected to a lifting threaded shaft, and the lifting threaded shaft is threadedly connected to the lifting seat.

[0010] Preferably, the lifting seat is fixedly connected to the outer side wall of the spray pipe network, a plurality of spray holes are opened at the bottom of the spray pipe network, and the vertical and horizontal pipelines of the spray pipe network correspond to the positions of the vertical and horizontal frames on the joint support frame.

[0011] Preferably, the diversion assembly includes a flow mesh plate fixed to the inner side wall of the longitudinal pipeline of the spray network, the flow mesh plate is fixedly connected to the diversion bucket, and the flow mesh plate is connected to a sealing rubber bead for blocking the diversion bucket port through a reset spring.

[0012] Preferably, the electrical connection assembly consists of two electrical connection rods and two contact pad guide plates, and the power sensor is electrically connected to the two contact pad guide plates respectively through the two electrical connection rods.

[0013] Preferably, the contact pad guide plate is fixedly connected to the inner side wall of the overflow trough, and the side wall of the overflow trough located on one side of the joint support frame is a thin plate.

[0014] Preferably, a booster air pump is fixedly connected to the inner end surface of the retaining seat receiving groove, and an air pressure sensor for detecting whether the bottom of the prefabricated board is cracked is provided on one side of the booster air pump.

[0015] Preferably, the internal defect detection component is composed of a plurality of arc-shaped sensing seats, the plurality of arc-shaped sensing seats are arranged in a plurality of circular arrays, the plurality of arc-shaped sensing seats located on the inner and outer circumferences are arranged in an interlaced manner, and ultrasonic sensors are arranged in the arc-shaped sensing seats.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the setting of the spray pipe network and diversion components, this solution can use the batch spray system to actively create a moisture gradient from the front to the back of the joint, accurately simulate the humidity differences caused by the operation sequence at the construction site, reflect the impact of different humidity conditions on the fluidity of the slurry, and truly restore the self-flow behavior of the slurry in different humidity environments (fluidity changes caused by water absorption).

[0018] 2. This solution, through the installation of an overflow trough and electrical connection components, can form a conductive overflow detection system using a slurry contact guide plate and an electrical connection rod to test the slurry flow characteristics at the joint. Slurry overflowing into the overflow trough immediately triggers circuit closure, enabling rapid defect location. The mapping relationship between the wetness gradient and the slurry fluidity changes is simultaneously recorded. The slurry in the low-humidity area absorbs water and thickens, increasing its flow resistance. The slurry in the high-humidity area remains fluid, reducing its flow resistance, providing direct experimental basis for optimizing concrete mix proportions.

[0019] 3. Through the setting of internal defect detection components, this scheme can use a simulated vibrator to apply a construction equivalent load to induce the failure of the shear weak point of the joint. The cracks at the bottom of the precast panel will cause a sudden drop in the air pressure in the sealed cavity to identify surface cracks. At the same time, the circular arc-shaped sensing seats form an ultrasonic sensing network, which uses internal cracks to change the ultrasonic propagation path. The damage coordinates are accurately located by comparing the data of multiple ultrasonic sensors on the same ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a joint leakage detection device for a composite slab support system proposed by the present invention;

[0021] Figure 2 This is an assembly diagram of a joint leakage detection device for a composite slab support system proposed by the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a structural diagram of the prefabricated panels assembled in a joint slurry leakage detection device for a composite panel support system proposed by the present invention;

[0024] Figure 5 This is a structural schematic diagram of a synchronization component in a joint leakage detection device for a composite slab support system proposed by the present invention;

[0025] Figure 6 This is a structural schematic diagram of a diversion component in a joint leakage detection device for a composite slab support system proposed by the present invention;

[0026] Figure 7This is a schematic structural diagram of a joint support frame and a retaining seat in a joint grout leakage detection device for a composite plate support system proposed by the present invention;

[0027] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0028] Figure 9 This is a schematic structural diagram of an internal defect detection component in a joint leakage detection device for a composite slab support system proposed by the present invention.

[0029] In the figure: 1. Test bench; 2. Test frame; 3. Prefabricated board; 4. Pre-installed steel bars; 5. Simulated vibrator; 6. Joint support frame; 7. Retaining seat; 8. Propulsion motor; 9. Main drive gear; 10. Synchronous gear ring; 11. Lifting threaded shaft; 12. Lifting seat; 13. Spray pipe network; 14. Return spring; 15. Diverter bucket; 16. Sealing rubber beads; 17. Power sensor; 18. Power connecting rod; 19. Contact slurry guide plate; 20. Booster air pump; 21. Ultrasonic generator; 22. Ultrasonic probe; 23. Arc-shaped sensing seat; 24. Overflow trough. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] Example, see Figures 1 to 9 A device for detecting grout leakage in a joint of a composite slab support system includes a test bench 1 and a test frame 2 for quality inspection of a precast slab 3. The top of the test bench 1 is fixedly mounted to the test frame 2 via a plurality of simulated vibrators 5. Two symmetrically arranged propulsion motors 8 are connected to the side walls of the test frame 2. The propulsion motors 8 are connected to a lifting seat 12 via a synchronization component. The lifting seat 12 is connected to a spray pipe network 13. The spray pipe network 13 is composed of a plurality of crisscrossing pipes. The spray pipe network 13 is connected to a plurality of diversion components for controlling water flow on the inner side walls of the longitudinal pipes.

[0034] Furthermore, a plurality of longitudinally staggered pre-installed steel bars 4 are provided on the prefabricated plate 3, the prefabricated plate 3 is adapted to the retaining seat 7, the joint support frame 6 is adapted to the retaining seat 7, the synchronization component includes a main drive gear 9 fixed on the output shaft of the propulsion motor 8, and both sides of the main drive gear 9 are meshed with synchronization rings 10, the inner wall of the synchronization ring 10 is fixedly connected with a lifting threaded shaft 11, the lifting threaded shaft 11 is threadedly connected to the lifting seat 12, and the lifting seat 12 is fixedly connected to the outer wall of the spray pipe network 13, and a plurality of spray holes are provided at the bottom of the spray pipe network 13. The vertical and horizontal pipelines of the spray pipe network 13 correspond to the positions of the vertical and horizontal frames on the joint support frame 6, and the diversion component includes a flow mesh plate fixed to the inner wall of the longitudinal pipeline of the spray pipe network 13, the flow mesh plate is fixedly connected with a diversion bucket 15, and the flow mesh plate is connected to a sealing rubber bead 16 for blocking the port of the diversion bucket 15 through a reset spring 14;

[0035] It should be noted that: the control starts the propulsion motor 8 to drive the main drive gear 9 to rotate, and the rotation of the main drive gear 9 will drive the synchronous gear rings 10 on both sides to rotate synchronously in the same direction, thereby causing the two lifting threaded shafts 11 to rotate synchronously in the same direction, driving the lifting seat 12 to descend to the set height, and the sealing rubber beads 16 in the spray pipe network 13 will be pressed by the water flow to stretch the reset spring 14, so that a gap is generated between the sealing rubber beads 16 and the port of the diverter bucket 15, which is convenient for the water flow to continue to flow into the next section of the pipeline, thereby spraying and moistening different joints of the prefabricated panel 3 in batches, and the water mist sprayed at the front end is more than that at the rear end, so that the wetness between the gaps before the front and rear joints of the composite panel are different;

[0036] The above benefits are: it is convenient to reproduce the condition of the prefabricated panel 3 before the construction of the composite panel under different wetness conditions of the prefabricated panel 3 in the future, making the test data more reliable;

[0037] The inner wall of the test frame 2 is connected to a plurality of retaining seats 7 for positioning and installing the prefabricated panels 3 through a joint support frame 6. The tops of the retaining seats 7 on the four sides are each provided with a plurality of overflow grooves 24. The top of the retaining seat 7 in the center is provided with a receiving groove. The inner side walls of the receiving grooves are connected to a plurality of power sensors 17. The power sensors 17 are connected to an electrical connection component for detecting whether slurry has flowed into the overflow groove 24.

[0038] Furthermore, the electrical connection assembly is composed of two electrical connection rods 18 and two contact pad guides 19. The power sensor 17 is electrically connected to the two contact pad guides 19 through the two electrical connection rods 18. The contact pad guides 19 are fixedly connected to the inner side wall of the overflow trough 24. The side wall of the overflow trough 24 located on one side of the joint support frame 6 is a thin plate.

[0039] It should be noted that: when the gap between the two precast panels 3 is filled with slurry, the slurry between the gaps of the precast panels 3 will flow on its own as time goes by. In the gap portion with lower wetness, the moisture of the slurry will be absorbed by the concrete on the dry precast panel 3, resulting in a decrease in the fluidity of the slurry. If the wetness of the gap portion is higher, the fluidity of the slurry in this portion will be improved, forming a comparison of joints with different wetness in the test. If the slurry in the joint portion overflows and diffuses to the edge, the overflowing slurry will quickly overflow into the overflow trough 24. The slurry entering the overflow trough 24 will quickly establish a connection path between the two contact slurry guide plates 19, thereby allowing the power-on sensor 17 to form a closed circuit through the two power-connecting rods 18, the two contact slurry guide plates 19 and the slurry that overflows and penetrates into the overflow trough 24, thereby triggering the power-on sensor 17 to start, so as to facilitate rapid testing to determine at which position the slurry overflow and penetration occurs.

[0040] The benefits of the above are: it is easy to test the flow characteristics of the slurry at the joints in the simulated composite slab casting process, and according to the test data and the wettability comparison between the gaps, the flow characteristics of the joint slurry under different conditions can be determined;

[0041] The inner end surface of the receiving tank is connected to an ultrasonic probe 22 via an ultrasonic generator 21, and the outer side of the ultrasonic probe 22 is arranged on the inner defect detection component;

[0042] Furthermore, a booster air pump 20 is fixedly connected to the inner end surface of the receiving groove of the retaining seat 7. A pressure sensor for detecting whether the bottom of the precast plate 3 is cracked is provided on one side of the booster air pump 20. The internal defect detection component is composed of a plurality of arc-shaped sensing seats 23. The plurality of arc-shaped sensing seats 23 are arranged in a plurality of circular arrays. The plurality of arc-shaped sensing seats 23 located on the inner and outer circumferences are staggered with each other. Ultrasonic sensors are provided in the arc-shaped sensing seats 23.

[0043] It should be noted that: the simulated vibrator 5 is used to apply vibration to the entire composite panel system, and the booster air pump 20 is controlled to start, so that the pressure in the sealed chamber between the prefabricated panel 3 and the receiving groove of the retaining seat 7 increases. If, during the vibration process, the bottom of the prefabricated panel 3 is damaged such as cracks, the air flow is pressed into the cracks, causing the air pressure in the receiving groove to decrease, which is then measured by the air pressure sensor. If, during the vibration process, the prefabricated panel 3 is damaged internally due to shear failure at the joint, the ultrasonic generator 21 is started and the ultrasonic probe 22 is used to generate ultrasonic waves at the center of the bottom of the prefabricated panel 3. The ultrasonic waves are transmitted in the solid medium of the prefabricated panel 3. If damage occurs inside the prefabricated panel 3, the transmission of the ultrasonic waves on this damage path is affected, and the ultrasonic waves will be detected by the ultrasonic sensor on the arc-shaped sensing seat 23 here, so that the data measured by the arc-shaped sensing seat 23 here are different from those of other arc-shaped sensing seats 23 on the same annular path, and then whether the prefabricated panel 3 is damaged is measured by comparison.

[0044] Based on the above benefits, it is possible to determine whether there is damage to the bottom and interior of the precast panel 3, to determine whether the shear resistance of the joints in the composite panel system has failed during construction, and to determine the overall performance of the composite panel system;

[0045] When the present invention is in use, the prefabricated panel 3 for sampling quality inspection is positioned and installed on the retaining seat 7 in the test frame 2, and the preinstalled steel bars 4 of the prefabricated panel 3 are bent and anchored, and then the propulsion motor 8 is controlled to start and drive the main drive gear 9 to rotate. The rotation of the main drive gear 9 will drive the synchronous gear rings 10 on both sides to rotate synchronously in the same direction, thereby causing the two lifting threaded shafts 11 to rotate synchronously in the same direction, driving the lifting seat 12 to descend to the set height. At this time, the spray pipe network 13 will be lowered to the gap between the installed prefabricated panels 3, and then the external pump pressure water source will be connected through the hose to spray the edges of the prefabricated panels 3. When the moistened water flow is transported to the spray pipe network 13, the sealing rubber beads 16 in the spray pipe network 13 are pressed by the water flow to stretch the reset spring 14, so that a gap is formed between the sealing rubber beads 16 and the port of the diverter 15, which facilitates the water flow to continue to flow into the next section of the pipe, thereby spraying and moistening different joints of the prefabricated panel 3 in batches. The water mist sprayed at the front end is more than that at the rear end, so that the wetness of each gap is different before the front and rear joints of the composite panel are connected, which facilitates the subsequent reproduction of the condition of the prefabricated panel 3 before the construction of the composite panel under the condition of different wetness of the prefabricated panel 3, making the test data more reliable;

[0046] When pouring concrete, the pouring process is simulated, so that the gap between the two precast panels 3 is filled with slurry. As time goes by, the slurry between the gaps of the precast panels 3 will flow on its own. In the gap portion with lower wetness, the moisture of the slurry will be absorbed by the concrete on the dry precast panels 3, resulting in a decrease in the fluidity of the slurry. If the wetness of the gap portion is higher, the fluidity of the slurry in this portion will increase, forming a comparison of joints with different wetness in the test. If the slurry in the joint portion overflows and diffuses to the edge, the overflowing slurry will quickly overflow into the overflow trough 24. The slurry entering the overflow trough 24 will quickly allow the two contacting slurries to flow. The guide plate 19 establishes a connection path, allowing the energized sensor 17 to form a closed circuit through the two power-connecting rods 18, the two contact slurry guide plates 19, and the slurry overflowing and penetrating into the overflow trough 24, thereby triggering the energized sensor 17 to quickly test and determine at which location the slurry overflow and penetration occurs. This facilitates testing the slurry flow characteristics of the joints in the simulated composite slab casting process. Based on the test data and the comparison of the wetness between the gaps, the flow characteristics of the joint slurry under different conditions can be determined, which has enlightening significance for the subsequent use of concrete ingredients for the precast slab 3 and the use of concrete ingredients in the joint process.

[0047] After the concrete pouring is completed, the simulated vibrator 5 is used to apply vibration to the entire composite panel system. If the precast panel 3 in the composite panel system is damaged during the vibration process, it means that the shear resistance of the joint part of the composite panel system is poor. The booster air pump 20 is controlled to start, so that the pressure in the sealed chamber between the precast panel 3 and the storage groove of the retaining seat 7 increases. If, during the vibration process, the bottom of the precast panel 3 is cracked or damaged, the air flow is pressed into the crack, so that the air pressure in the storage groove is reduced, and then it is measured by the air pressure sensor. If, during the vibration process, the precast panel 3 is damaged internally due to shear failure of the joint part, the ultrasonic generator 21 is started to use ultrasound The wave probe 22 generates ultrasonic waves at the center of the bottom of the prefabricated panel 3. The ultrasonic waves are transmitted in the solid medium of the prefabricated panel 3. If damage occurs inside the prefabricated panel 3, the transmission of the ultrasonic waves on this damage path will be affected, and it will be detected by the ultrasonic sensor on the arc-shaped sensing seat 23 here, so that the data measured by the arc-shaped sensing seat 23 here is different from that of other arc-shaped sensing seats 23 on the same annular path, and then the data is compared to measure whether there is damage inside the prefabricated panel 3. In this way, whether there is damage to the bottom and inside of the prefabricated panel 3 can be judged to determine whether the shear resistance of the joint part of the composite panel system fails during construction, and the overall performance of the composite panel system can be obtained.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A joint leakage detection device for a composite panel support system, comprising a test table (1) and a test frame (2) for quality inspection of prefabricated panels (3), characterized in that: The top of the test bench (1) is fixedly mounted on the test frame (2) via a plurality of simulated vibrators (5); the side wall of the test frame (2) is connected to two symmetrically arranged propulsion motors (8); the propulsion motors (8) are connected to a lifting seat (12) via a synchronization component; the lifting seat (12) is connected to a spray pipe network (13); the spray pipe network (13) is composed of a plurality of crisscrossing pipes; the spray pipe network (13) is connected to a plurality of diversion components for controlling water flow on the inner side walls of the longitudinal pipes; The inner side wall of the test frame (2) is connected to a plurality of retaining seats (7) for positioning and installing the prefabricated plate (3) through a joint support frame (6), the top of the retaining seat (7) located on four sides is provided with a plurality of overflow grooves (24), the top of the retaining seat (7) located in the center is provided with a receiving groove, the inner side wall of the receiving groove is connected to a plurality of energized sensors (17), the energized sensors (17) are connected to an electrical connection component for detecting whether slurry flows into the overflow groove (24), the inner end surface of the receiving groove is connected to an ultrasonic probe (22) through an ultrasonic generator (21), and the outer side of the ultrasonic probe (22) is arranged on the inner defect detection component.

2. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The prefabricated plate (3) is provided with a plurality of longitudinally staggered preinstalled steel bars (4), the prefabricated plate (3) is adapted to the retaining seat (7), and the joint support frame (6) is adapted to the retaining seat (7).

3. The joint grout leakage detection device of the composite slab support system according to claim 1 is characterized in that: The synchronization component includes a main drive gear (9) fixed on the output shaft of the propulsion motor (8), and both sides of the main drive gear (9) are meshedly connected with synchronization ring gears (10). The inner side wall of the synchronization ring gear (10) is fixedly connected with a lifting thread shaft (11), and the lifting thread shaft (11) is threadedly connected to the lifting seat (12).

4. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The lifting seat (12) is fixedly connected to the outer side wall of the spray pipe network (13); a plurality of spray holes are provided at the bottom of the spray pipe network (13); and the vertical and horizontal pipes of the spray pipe network (13) correspond to the positions of the vertical and horizontal frames on the joint support frame (6).

5. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The diversion assembly comprises a flow mesh plate fixed to the inner side wall of the longitudinal pipeline of the spray pipe network (13), the flow mesh plate being fixedly connected to a diversion bucket (15), and the flow mesh plate being connected to a sealing rubber bead (16) for blocking the port of the diversion bucket (15) via a return spring (14).

6. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The electrical connection assembly consists of two electrical connection rods (18) and two contact pad guide plates (19), and the energized sensor (17) is electrically connected to the two contact pad guide plates (19) via the two electrical connection rods (18).

7. The joint leakage detection device of the composite slab support system according to claim 6 is characterized in that: The contact pad guide plate (19) is fixedly connected to the inner side wall of the overflow groove (24), and the side wall of the overflow groove (24) located on one side of the joint support frame (6) is provided as a thin plate.

8. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The inner end surface of the receiving groove of the retaining seat (7) is fixedly connected to a booster air pump (20), and a pressure sensor for detecting whether the bottom of the prefabricated plate (3) is cracked is provided on one side of the booster air pump (20).

9. The joint leakage detection device of the composite slab support system according to claim 1 is characterized in that: The internal defect detection component is composed of a plurality of arc-shaped sensing seats (23), the plurality of arc-shaped sensing seats (23) are arranged in a plurality of circular arrays, the plurality of arc-shaped sensing seats (23) located on the inner and outer circumferences are arranged in an interlaced manner, and ultrasonic sensors are arranged in the arc-shaped sensing seats (23).

Images