Method and device for detecting the fullness of a grouting sleeve based on the drop ball method

Abstract

The application provides a detection method and device for fullness of a grouting sleeve based on a drop ball method, and relates to the technical field of fullness detection, which comprises an outer layer, a connecting sleeve is fixed in the inner part of the outer layer, reinforcing steel bars are fixedly inserted into the top and bottom centers of the connecting sleeve, and the connecting sleeve is penetrated into the inner part along the rubber plug and the grout hole, the depth of penetration of the upper and lower hollow pipes is measured to know the diameter of the connecting sleeve, then the range of the interval between the connecting sleeve and the reinforcing steel bars is calculated according to the outer diameter of the reinforcing steel bars, the position of the limiting frame and the ball of the detection assembly is adjusted, then the ball is dropped along the limiting frame by unwinding the lifting rope, the fullness of grouting is detected by the falling speed and depth of the ball, and the detection result is fed back to a display device, the position of the ball falling can be rotated by 360 degrees, the connecting sleeve with different inner diameters can be inserted and used, and the ball is prevented from colliding with the reinforcing steel bars and the inner wall of the connecting sleeve, so that the convenience and accuracy of detection are maintained.

Description

Technical Field

[0001] This disclosure relates to the field of saturation testing technology, and in particular to a method and apparatus for testing the saturation of grouting sleeves based on the falling ball method. Background Technology

[0002] The falling ball method is an experimental method in the field of fluid mechanics for measuring the viscosity coefficient of liquids. It involves observing the final velocity of a small ball falling uniformly in a liquid. A ruler is suspended in a vertically placed, transparent cylindrical cylinder filled with the liquid to be tested to mark the falling position of the ball. An image acquisition system is aimed at the lower part of the transparent cylindrical cylinder and transmits the images of the falling ball and the ruler to a computer. On the computer monitor, the grid method or cross coordinate method is used to compare and calculate each sampling position of the falling ball with the ruler to obtain the final velocity of the ball and thus calculate the viscosity coefficient of the liquid to be tested.

[0003] Except for connection nodes, precast concrete structures are superior to cast-in-place concrete structures in all other aspects. However, the connection nodes of precast concrete structures need to be tested for fullness after pouring to ensure the overall quality of the precast concrete structure. Conventional testing methods, such as endoscopy, are time-consuming and costly, and are only suitable for projects with a large workload.

[0004] When using the falling ball method to measure the fullness inside a connection node, a common problem is that different connection nodes have different dimensions. Therefore, it is necessary to ensure that the falling ball does not come into contact with the inner wall of the node or the reinforcing steel. In addition, multi-point measurements are required. These are not easy to adjust inside the connection node, which can easily affect the accuracy of the measurement. Summary of the Invention

[0005] This disclosure aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, the purpose of this disclosure is to provide a method and apparatus for detecting the fullness of grouting sleeves based on the falling ball method.

[0007] To achieve the above objectives, this disclosure provides a device for detecting the fullness of grouting sleeves based on the falling ball method, comprising: an outer layer, wherein a connecting sleeve is fixedly installed inside the outer layer, and reinforcing bars are fixedly inserted at the top and bottom centers of the connecting sleeve, with a certain interval between the two reinforcing bars located inside the connecting sleeve; grout outlet channels, wherein grout outlet channels are formed on the outer layer and the connecting sleeve at the intervals between the two reinforcing bars, and rubber plugs are fixedly inserted on the outer side of the grout outlet channels; and a detection assembly, wherein the detection assembly includes an upper hollow tube and a lower hollow tube, the upper and lower hollow tubes being combined into a single hollow circular tube, and the upper and lower hollow tubes being slidably connected. The tube slides through the rubber stopper, and a limiting frame is installed at one end of the lower hollow tube that enters the connecting sleeve. A ball is stored inside the limiting frame. A mounting bracket is fixed to the top of the upper hollow tube at the outer end of the rubber stopper, and a display device is fixed to the top of the mounting bracket. A winding bracket is fixed to one side of the mounting bracket at the bottom of the display device, and a lifting rope is wound inside the winding shaft of the winding bracket. The lifting rope passes through the top of the upper hollow tube. A screw is threaded into the center of the upper hollow tube at the outer end of the rubber stopper, and a sealing plate is rotatably connected to one end of the screw that enters the connecting sleeve. The sealing plate slides along the inside of the upper and lower hollow tubes.

[0008] Optionally, the detection component further includes: a moving groove, a threading plate, a sliding groove, and a protruding strip. The upper hollow tube has sliding grooves on both sides, and the lower hollow tube has protruding strips fixed to the top of both sides. The protruding strips slide along the inside of the sliding grooves. The upper hollow tube has a sliding groove on the top inner wall. The sliding groove is slidably connected to the threading plate at the top of the limiting frame. The bottom of the threading plate is fixedly connected to the lower hollow tube. The suspension rope passes through the threading plate and is fixedly connected to the sphere.

[0009] Optionally, a second electric push rod is rotatably mounted inside the sealing plate via a bearing, and the extended end of the second electric push rod slides through the moving notch and is fixed to a connecting plate; wherein, two first electric push rods are fixed to one end of the connecting plate facing the limiting frame, and the extended end of the first electric push rod is fixedly connected to the limiting frame.

[0010] Optionally, a small motor is fixed to the top of the sealing plate on the second electric push rod, and the output end of the small motor is fixedly connected to the top of the second electric push rod; wherein, a limit frame is fixed inside the limit frame, and the limit frame and the limit frame wrap around the four sides of the sphere.

[0011] Optionally, the limiting frame has a ball-dropping hole at the bottom of the sphere, the top of the limiting frame is in contact with the top of the sphere, and the suspension rope slides through the perforation at the top of the limiting frame.

[0012] Optionally, a fixing plate is fixed to the upper and lower hollow tubes on the outer surface of the rubber stopper, and a rangefinder is fixedly installed on the fixing plate; wherein the rangefinders of the upper and lower hollow tubes correspond to the top and bottom of the rubber stopper, respectively.

[0013] Optionally, a ring is rotatably fitted onto the end of the screw away from the rubber stopper, and a scale is fixed to the bottom of the ring, the scale sliding through the rubber stopper.

[0014] Optionally, an angular velocity sensor is fixedly installed on the outer end of one side of the winding frame, and the angular velocity sensor is connected to the winding shaft of the winding frame. A disc is rotatably connected to the other side of the winding frame, and the disc is fixedly connected to the winding shaft of the winding frame. A locking bolt is threaded into the surface of the disc, and the locking bolt is in contact with the outer side of the winding frame.

[0015] Optionally, the bottom of the lower hollow tube is provided with a movable notch, the mounting plate has the same width as the movable notch, and the limiting frame has the same inner and outer diameters as the lower hollow tube.

[0016] A method for detecting the fullness of grouting sleeves based on the falling ball method, the method comprising the following steps:

[0017] (1) Based on the actual situation of the connecting sleeve, select the slurry outlet channel to drill and make the test channel. Seal the outer end of the slurry outlet channel with a rubber plug, and insert the upper half hollow tube and the lower half hollow tube of the test component through the rubber plug into the inside of the connecting sleeve.

[0018] (2) The upper hollow tube is inserted into the inner wall of the connecting sleeve on the side away from the grout outlet. The insertion length of the upper hollow tube is measured, and the distance between the reinforcing bar and the inner wall of the connecting sleeve is calculated based on the outer diameter of the outer end reinforcing bar.

[0019] (3) Pull the lower hollow tube outward so that the limiting frame and the ball drop point move to the space between the reinforcing bar and the inner wall of the connecting sleeve. Calculate the distance and rotate the screw at the outer end of the upper hollow tube to move the center position of the sealing plate to the axis position of the connecting sleeve.

[0020] (4) Release the restriction of the rewinding frame, and the ball falls along the bottom of the limit frame. The hanging rope is unwound to maintain the connection with the ball. When the ball falls at a constant speed, the force value remains stable. When the force value decreases to 40% of the original force value, it can be considered that the ball has fallen to the bottom. At this time, measure the depth of the ball's descent and retrieve the ball.

[0021] (5) Rotate the limiting frame and the ball 360 degrees with the position of the sealing plate, and take multiple measurements at different positions. The maximum value of the depth measured multiple times shall not exceed the design value, and the maximum and minimum values ​​shall not exceed 20% of the average value. Otherwise, it can be considered as not full.

[0022] The technical solution provided in this disclosure may include the following beneficial effects:

[0023] 1. This invention uses an angular velocity sensor to measure the number of rotations of the take-up shaft and the length of the unwinding rope, thereby determining the height of the ball's fall. The locking bolt on the disc presses against the take-up frame to brake the take-up shaft. Before the detection component is initially inserted, the rope is kept unwinding, and the ball is housed inside the limiting frame. It can be inserted into the connecting sleeve along with the lower and upper hollow tubes. When the positions of the limiting frame and the ball are adjusted, the locking bolt is released from the lock on the take-up shaft. Under the action of gravity, the ball falls from the bottom of the limiting frame, and the rope unwinds synchronously to maintain its connection with the ball.

[0024] 2. In this invention, when the upper hollow tube is inserted into the connecting sleeve, the diameter of the connecting sleeve can be measured. Then, by rotating the screw, the sealing plate moves along the interior of the upper and lower hollow tubes. Because of the connection between the first electric push rod and the limiting frame, the limiting frame also moves synchronously. The distance the screw moves can be determined using a scale. The limiting frame is moved to a position between the reinforcing bar and the inner wall of the connecting sleeve. Depending on the length the screw penetrates, it can be used for connecting sleeves of different diameters. After the limiting frame moves to the designated position, the second electric push rod moves the connecting plate from the moving part... As the ball exits, the limiting frame will also descend synchronously. During this process, the hoisting rope needs to be released slightly to maintain the connection between the ball and the hoisting rope. The small motor drives the second electric push rod and the connecting plate to rotate. The limiting frame and the ball can rotate 360 ​​degrees along the axis of the connecting sleeve, so that the position of the ball's fall can be adjusted for detection at different positions. Because the second electric push rod pushes the limiting frame to descend, it can avoid the lower half of the hollow tube interfering with the rotation of the limiting frame. The sealing plate connected by the screw can seal the upper half of the hollow tube and the lower half of the hollow tube to prevent the slurry from flowing out.

[0025] 3. In this invention, after the upper and lower hollow tubes are inserted into the connecting sleeve together, the lower hollow tube is pulled outward. The lower hollow tube slides along the grooves on both sides of the upper hollow tube through the protrusions on the top of both sides, maintaining the connection between the upper and lower hollow tubes. At the same time, the position of the limiting frame and the ball is initially adjusted to facilitate the subsequent descent and rotation of the limiting frame and change the position of the ball's fall. The suspension rope is fixedly connected to the ball through the threading plate and the limiting frame. When the limiting frame moves, the threading plate slides synchronously along the moving groove to keep the position of the suspension rope at the top of the ball's axis, thereby limiting the position of the ball's descent and avoiding collisions between the ball and the connecting sleeve and the reinforcing bar during descent, which would affect the test results. The depth of the upper and lower hollow tubes can be determined by the rangefinders installed at the outer ends of the upper and lower hollow tubes, thus preparing for subsequent adjustment of the position of the limiting frame and the ball.

[0026] 4. Compared with the prior art, this invention inserts the ball into the connecting sleeve along the rubber plug and grout outlet channel. The diameter of the connecting sleeve is determined by measuring the insertion depth of the upper and lower hollow tubes. Then, the range of the gap between the connecting sleeve and the reinforcing bar is calculated based on the outer diameter of the reinforcing bar. The position of the limiting frame and the ball of the detection component is adjusted. Then, the ball is unwound by the suspension rope and falls along the limiting frame. The grouting fullness is detected by the speed and depth of the ball's descent and fed back to the display device. The position of the ball's fall can be rotated 360 degrees, which is suitable for the insertion of connecting sleeves with different inner diameters. It also avoids collisions between the ball and the reinforcing bar and the inner wall of the connecting sleeve, maintaining the convenience and accuracy of the detection.

[0027] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0029] Figure 1 This is a schematic flowchart of a method for detecting the fullness of grouting sleeves based on the falling ball method, according to an embodiment of this disclosure.

[0030] Figure 2 This is a schematic diagram of the overall structure of a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0031] Figure 3 This is a schematic diagram of the outer layer and the internal structure of the connecting sleeve in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0032] Figure 4 This is a schematic diagram of the internal structure of the detection component penetrating the connecting sleeve in a grouting sleeve fullness detection device based on the falling ball method according to an embodiment of this disclosure;

[0033] Figure 5 This is a schematic diagram of the outer end structure of the upper and lower hollow tubes in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure.

[0034] Figure 6 This is a schematic diagram of the surface structure of the mounting frame in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0035] Figure 7 This is a schematic diagram of the connection between the limiting frame and the lower hollow tube in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0036] Figure 8 This is a schematic diagram of the connection between the limiting frame and the upper hollow tube in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0037] Figure 9 This is a schematic diagram of the top structure of the lower hollow tube in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0038] Figure 10 This is a schematic diagram of the bottom structure of the upper hollow tube in a grouting sleeve fullness detection device based on the falling ball method proposed in an embodiment of this disclosure;

[0039] As shown in the figure: 1. Outer layer; 11. Reinforcing bar; 12. Connecting sleeve; 13. Grout outlet channel; 14. Rubber stopper;

[0040] 2. Detection components; 21. Upper hollow tube; 22. Lower hollow tube; 23. Mounting bracket; 24. Display device; 25. Fixing plate; 26. Winding rack; 27. Lifting rope; 28. Angular velocity sensor; 29. ​​Screw; 210. Ring; 211. Scale; 212. Disc; 213. Locking bolt; 214. Rangefinder; 215. Moving notch; 216. Limiting frame; 217. Ball drop hole; 218. First electric push rod; 219. Connecting plate; 220. Moving groove; 221. Threading plate; 222. Slide groove; 223. Raised strip; 224. Sphere; 225. Limiting frame; 226. Small motor; 227. Second electric push rod; 228. Sealing plate. Detailed Implementation

[0041] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0042] like Figure 1 As shown, the method for detecting the fullness of grouting sleeves based on the falling ball method includes the following steps:

[0043] (1) Based on the actual situation of the connecting sleeve, select the slurry outlet channel to drill and make the test channel. Seal the outer end of the slurry outlet channel with a rubber plug, and insert the upper half hollow tube and the lower half hollow tube of the test component through the rubber plug into the inside of the connecting sleeve.

[0044] (2) The upper hollow tube is inserted into the inner wall of the connecting sleeve on the side away from the grout outlet. The insertion length of the upper hollow tube is measured, and the distance between the reinforcing bar and the inner wall of the connecting sleeve is calculated based on the outer diameter of the outer end reinforcing bar.

[0045] (3) Pull the lower hollow tube outward so that the limiting frame and the ball drop point move to the space between the reinforcing bar and the inner wall of the connecting sleeve. Calculate the distance and rotate the screw at the outer end of the upper hollow tube to move the center position of the sealing plate to the axis position of the connecting sleeve.

[0046] (4) Release the restriction of the rewinding frame, and the ball falls along the bottom of the limit frame. The hanging rope is unwound to maintain the connection with the ball. When the ball falls at a constant speed, the force value remains stable. When the force value decreases to 40% of the original force value, it can be considered that the ball has fallen to the bottom. At this time, measure the depth of the ball's descent and retrieve the ball.

[0047] (5) Rotate the limiting frame and the ball 360 degrees with the position of the sealing plate, and take multiple measurements at different positions. The maximum value of the depth measured multiple times shall not exceed the design value, and the maximum and minimum values ​​shall not exceed 20% of the average value. Otherwise, it can be considered as not full.

[0048] like Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, this disclosure proposes a device for detecting the fullness of grouting sleeves based on the falling ball method, comprising: an outer layer 1, wherein a connecting sleeve 12 is fixed inside the outer layer 1, and steel bars 11 are fixedly inserted at the top and bottom centers of the connecting sleeve 12, with a certain interval between the two steel bars 11 located inside the connecting sleeve 12; a grout outlet channel 13, wherein the outer layer 1 and the connecting sleeve 12 are provided with grout outlet channels 13 at the intervals between the two steel bars 11, and a rubber plug 14 is fixedly inserted on the outside of the grout outlet channel 13; and a detection component 2, wherein the detection component 2 includes an upper hollow tube 21 and a lower hollow tube 22, wherein the upper hollow tube... The upper hollow tube 21 and the lower hollow tube 22 are combined into a single hollow circular tube, and the upper hollow tube 21 and the lower hollow tube 22 are slidably connected. The upper hollow tube 21 and the lower hollow tube 22 slide through the rubber stopper 14. One end of the lower hollow tube 22 that enters the connecting sleeve 12 is fitted with a limiting frame 216, which stores a ball 224. A mounting bracket 23 is fixed to the top of the upper hollow tube 21 at the outer end of the rubber stopper 14, and a display device 24 is fixed to the top of the mounting bracket 23. A winding rack 26 is fixed to one side of the mounting bracket 23 at the bottom of the display device 24. 26, and a lifting rope 27 is wound inside the winding shaft of the winding frame 26, the lifting rope 27 passing through the top of the upper hollow tube 21; a screw 29 is threadedly inserted into the center of the upper hollow tube 21 at the outer end of the rubber plug 14, and a sealing plate 228 is rotatably connected to one end of the screw 29 that passes through the connecting sleeve 12, the sealing plate 228 sliding along the inside of the upper hollow tube 21 and the lower hollow tube 22. When using the device, the upper hollow tube 21 and the lower hollow tube 22 are combined and inserted into the connecting sleeve 12 along the rubber plug 14 and the slurry outlet channel 13, and the length of the upper hollow tube 21 and the lower hollow tube 22 is measured. The diameter of the connecting sleeve 12 is determined by the depth of the test. Then, the range of the gap between the connecting sleeve 12 and the rebar 11 is calculated based on the outer diameter of the rebar 11. The positions of the limiting frame 216 and the ball 224 of the detection component 2 are adjusted. Then, the ball 224 is unwound by the hanging rope 27 and falls along the limiting frame 216. The grouting fullness is detected by the speed and depth of the ball 224's descent and fed back to the display device 24. The position of the ball 224 can be rotated 360 degrees, which is suitable for the insertion of connecting sleeves 12 with different inner diameters. This avoids collisions between the ball 224 and the inner wall of the rebar 11 and the connecting sleeve 12, maintaining the convenience and accuracy of the detection.

[0049] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10As shown, in some embodiments, the detection component 2 further includes: a moving groove 220, a threading plate 221, a sliding groove 222, and a protruding strip 223. Sliding grooves 222 are provided on both sides of the upper hollow tube 21, and protruding strips 223 are fixed to the top of both sides of the lower hollow tube 22. The protruding strips 223 slide along the inside of the sliding grooves 222. A sliding groove 222 is provided on the top inner wall of the upper hollow tube 21. The sliding groove 222 is slidably connected to the threading plate 221 at the top of the limiting frame 216. The bottom of the threading plate 221 is fixedly connected to the lower hollow tube 22. The suspension rope... 27 passes through the threading plate 221 and is fixedly connected to the ball 224. The limiting frame 216 is located at the bottom of the ball 224 and has a ball drop hole 217. The top of the limiting frame 225 is in contact with the top of the ball 224. The hanging rope 27 slides through the hole at the top of the limiting frame 225. The upper hollow tube 21 and the lower hollow tube 22 are fixed with a fixing plate 25 on the outer surface of the rubber stopper 14, and a rangefinder 214 is fixedly installed on the fixing plate 25. The rangefinders 214 of the upper hollow tube 21 and the lower hollow tube 22 correspond to the top and bottom of the rubber stopper 14, respectively.

[0050] Understandably, after the upper hollow tube 21 and the lower hollow tube 22 are inserted together into the connecting sleeve 12, the lower hollow tube 22 is pulled outward. The lower hollow tube 22 slides along the sliding grooves 222 on both sides of the upper hollow tube 21 via the protrusions 223 on both sides of the top, maintaining the connection between the upper hollow tube 21 and the lower hollow tube 22. At the same time, the positions of the limiting frame 216 and the ball 224 are initially adjusted to facilitate the subsequent descent and rotation of the limiting frame 216 and the changing of the falling position of the ball 224. The suspension rope 27 is connected to the ball 224 through the threading plate 221 and the limiting frame 225. With a fixed connection, when the limiting frame 216 moves, the threading plate 221 slides synchronously along the moving groove 220, keeping the position of the suspension rope 27 at the top of the axis of the ball 224. This limits the descent position of the ball 224 and prevents the ball 224 from colliding with the connecting sleeve 12 and the reinforcing bar 11 during descent, thus affecting the test results. The depth of the upper hollow tube 21 and the lower hollow tube 22 can be determined by the rangefinder 214 installed at the outer ends of the upper hollow tube 21 and the lower hollow tube 22, thus preparing for subsequent adjustment of the position of the limiting frame 216 and the ball 224.

[0051] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, in some embodiments, a second electric push rod 227 is rotatably mounted inside the sealing plate 228 via a bearing, and the extended end of the second electric push rod 227 slides through the moving notch 215 and is fixed to a connecting plate 219; wherein, two first electric push rods 218 are fixed to one end of the connecting plate 219 facing the limiting frame 216, and the extended ends of the first electric push rods 218 are fixedly connected to the limiting frame 216; a small motor 226 is fixed to the top of the sealing plate 228 at the second electric push rod 227, and the output end of the small motor 226 is connected to the second electric push rod. 227 Top fixed connection; wherein, the limiting frame 216 is fixed inside the limiting bracket 225, the limiting bracket 225 and the limiting frame 216 wrap around the four sides of the sphere 224, the end of the screw 29 away from the rubber stopper 14 is rotatably sleeved with a ring 210, and the bottom of the ring 210 is fixed with a scale 211, the scale 211 slides through the rubber stopper 14, the bottom of the lower hollow tube 22 is provided with a movable notch 215, the width of the mounting plate is the same as that of the movable notch 215, and the inner diameter and outer diameter of the limiting frame 216 are the same as those of the lower hollow tube 22.

[0052] Understandably, when the upper hollow tube 21 is inserted into the connecting sleeve 12, the diameter of the connecting sleeve 12 can be measured. Then, the screw 29 is rotated, and the sealing plate 228 moves along the interior of the upper hollow tube 21 and the lower hollow tube 22. Because the first electric push rod 218 is connected to the limiting frame 216, the limiting frame 216 also moves synchronously. The distance the screw 29 moves can be determined using a scale 211. The limiting frame 216 is moved to a position between the reinforcing bar 11 and the inner wall of the connecting sleeve 12. Depending on the length the screw 29 rotates through, it can be used for connecting sleeves 12 of different diameters. After the limiting frame 216 moves to the designated position, the second electric push rod 227 moves the connecting plate 219 from the moving notch. When 215 exits, the limiting frame 216 will also descend synchronously. During this process, the hoisting rope 27 needs to be released slightly to maintain the connection between the ball 224 and the hoisting rope 27. The small motor 226 drives the second electric push rod 227 and the connecting plate 219 to rotate. The limiting frame 216 and the ball 224 can rotate 360 ​​degrees along the axis of the connecting sleeve 12, so that the falling position of the ball 224 can be adjusted for different position detection. Because the second electric push rod 227 pushes the limiting frame 216 to descend, it can avoid the lower hollow tube 22 interfering with the rotation of the limiting frame 216. The sealing plate 228 connected to the screw 29 can seal the upper hollow tube 21 and the lower hollow tube 22 to prevent the slurry from flowing out.

[0053] like Figure 5 and Figure 6As shown, in some embodiments, an angular velocity sensor 28 is fixedly installed on the outer end of one side of the winding frame 26, and the angular velocity sensor 28 is connected to the winding shaft of the winding frame 26. A disc 212 is rotatably connected to the other side of the winding frame 26, and the disc 212 is fixedly connected to the winding shaft of the winding frame 26. A locking bolt 213 is threaded into the surface of the disc 212, and the locking bolt 213 is in contact with the outer side of the winding frame 26.

[0054] It should be noted that the angular velocity sensor 28 can measure the number of rotations of the take-up shaft and the length of the unwinding of the suspension rope 27, thereby determining the height of the fall of the ball 224. The take-up shaft can be braked by the locking bolt 213 on the disc 212 pressing against the take-up frame 26. Before the detection component 2 is initially inserted, the suspension rope 27 is kept unwinding, and the ball 224 is housed inside the limiting frame 216. It can be inserted into the connecting sleeve 12 along with the lower half-hollow tube 22 and the upper half-hollow tube 21. When the positions of the limiting frame 216 and the ball 224 are adjusted, the locking bolt 213 is released from locking the take-up shaft. Under the action of gravity, the ball 224 falls from the bottom of the limiting frame 216, and the suspension rope 27 unwinds synchronously to maintain the connection with the ball 224.

[0055] Working principle:

[0056] When using the device, the upper hollow tube 21 and the lower hollow tube 22 are joined together and inserted into the connecting sleeve 12 along the rubber plug 14 and the slurry outlet channel 13. The diameter of the connecting sleeve 12 is determined by measuring the insertion depth of the upper hollow tube 21 and the lower hollow tube 22. Then, the spacing between the connecting sleeve 12 and the reinforcing bar 11 is calculated based on the outer diameter of the reinforcing bar 11. After the upper hollow tube 21 and the lower hollow tube 22 are inserted into the connecting sleeve 12 together, the lower hollow tube 22 is pulled outward. The lower hollow tube 22 slides along the sliding grooves 222 on both sides of the upper hollow tube 21 through the protrusions 223 on both sides of the top, maintaining the connection between the upper hollow tube 21 and the lower hollow tube 22. At the same time, the positions of the limiting frame 216 and the ball 224 are initially adjusted to facilitate the subsequent adjustment of the limiting frame 216. 6. The sphere 224 is lowered and rotated to change its position. The suspension rope 27 is fixedly connected to the sphere 224 via the threading plate 221 and the limiting frame 225. When the limiting frame 216 moves, the threading plate 221 slides synchronously along the moving groove 220, keeping the suspension rope 27 inserted at the top of the axis of the sphere 224. This limits the descent position of the sphere 224, preventing it from colliding with the connecting sleeve 12 and the reinforcing bar 11 during descent and affecting the test results. The depth of insertion of the upper hollow tube 21 and the lower hollow tube 22 can be determined by the rangefinder 214 installed at the outer ends of the upper hollow tube 21 and the lower hollow tube 22, thus preparing for subsequent adjustment of the position of the limiting frame 216 and the sphere 224. The connecting sleeve is inserted into the upper hollow tube 21. When inside the cylinder 12, the diameter of the connecting sleeve 12 can be measured. Then, the screw 29 is rotated, and the sealing plate 228 moves along the upper half of the hollow tube 21 and the lower half of the hollow tube 22. Because the first electric push rod 218 is connected to the limiting frame 216, the limiting frame 216 also moves synchronously. The distance the screw 29 moves can be determined by the scale 211. The position of the limiting frame 216 is moved between the reinforcing bar 11 and the inner wall of the connecting sleeve 12. Depending on the length the screw 29 rotates through, it can be used for connecting sleeves 12 of different diameters. After the limiting frame 216 moves to the designated position, the second electric push rod 227 pushes the connecting plate 219 out of the moving notch 215, and the limiting frame 216 will also descend synchronously. During this process, the lifting rope 27 needs to be slightly released. A section is extended to maintain the connection between the sphere 224 and the suspension rope 27. A small motor 226 drives the second electric push rod 227 and the connecting plate 219 to rotate. The limiting frame 216 and the sphere 224 can rotate 360 ​​degrees along the axis of the connecting sleeve 12, allowing the sphere 224 to fall at an adjustable position for detection at different locations. Because the second electric push rod 227 pushes the limiting frame 216 downwards, it prevents the lower hollow tube 22 from interfering with the rotation of the limiting frame 216. The sealing plate 228 connected to the screw 29 seals the upper hollow tube 21 and the lower hollow tube 22, preventing slurry leakage. The angular velocity sensor 28 measures the number of rotations of the winding shaft and the unwinding length of the suspension rope 27, thus determining the falling height of the sphere 224.The locking bolt 213 on the disc 212 presses against the winding frame 26, braking the winding shaft. Before initially inserting the detection component 2, the suspension rope 27 is kept unwound, and the sphere 224 is housed inside the limiting frame 216. It can be inserted into the connecting sleeve 12 along with the lower hollow tube 22 and the upper hollow tube 21. After adjusting the positions of the limiting frame 216 and the sphere 224, the locking bolt 213 is released from locking the winding shaft. Under gravity, the sphere 224 falls from the bottom of the limiting frame 216, and the suspension rope 27 unwinds synchronously to maintain connection with the sphere 224. The sphere 224 falls along the limiting frame 216. The grouting fullness is detected by the speed and depth of the sphere 224's descent, and the feedback is displayed on the display device 24.

[0057] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0058] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0059] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A device for detecting the fullness of grouting sleeves based on the falling ball method, characterized in that, include: The outer layer (1) has a connecting sleeve (12) fixed inside. The top and bottom centers of the connecting sleeve (12) are fixedly inserted with steel bars (11), and the two steel bars (11) are located inside the connecting sleeve (12) with a certain interval. The outer layer (1) and the connecting sleeve (12) are provided with grout outlet channels (13) at the intervals between two steel bars (11), and a rubber plug (14) is fixedly inserted into the outer side of the grout outlet channel (13). The detection component (2) includes an upper hollow tube (21) and a lower hollow tube (22), which are combined into a hollow circular tube and are slidably connected. The upper hollow tube (21) and the lower hollow tube (22) slide through a rubber stopper (14). One end of the lower hollow tube (22) that is inserted into the connecting sleeve (12) is fitted with a limit frame (216), which stores a ball (224) inside. Mounting bracket (23), the upper hollow tube (21) is fixed at the top of the outer end of the rubber plug (14) and the top of the mounting bracket (23) is fixed with a display device (24). The mounting frame (23) is fixed on one side of the bottom of the display device (24), and the winding frame (26) has a hanging rope (27) wound inside the winding shaft of the winding frame (26), and the hanging rope (27) passes through the top of the upper hollow tube (21); A screw (29) is threaded into the center of the upper hollow tube (21) at the outer end of the rubber plug (14), and a sealing plate (228) is rotatably connected to one end of the screw (29) that passes through the connecting sleeve (12). The sealing plate (228) slides along the inside of the upper hollow tube (21) and the lower hollow tube (22). The detection assembly (2) also includes: The upper hollow tube (21) has sliding grooves (222) on both sides, and the lower hollow tube (22) has convex strips (223) fixed on the top of both sides. The convex strips (223) slide along the inside of the sliding grooves (222). The upper hollow tube (21) has a groove (222) on its top inner wall. The groove (222) is slidably connected to the top of the limiting frame (216) with a threading plate (221). The bottom of the threading plate (221) is fixedly connected to the lower hollow tube (22). The hanging rope (27) passes through the threading plate (221) and is fixedly connected to the ball (224). The sealing plate (228) has a second electric push rod (227) installed inside through a bearing. The extended end of the second electric push rod (227) slides out of the moving notch (215) and is fixed with a connecting plate (219). Two first electric push rods (218) are fixed to one end of the connecting plate (219) facing the limiting frame (216), and the extended end of the first electric push rod (218) is fixedly connected to the limiting frame (216). A small motor (226) is fixed on the top of the sealing plate (228) and the output end of the small motor (226) is fixedly connected to the top of the second electric push rod (227). The limiting frame (216) has a limiting bracket (225) fixed inside. The limiting bracket (225) and the limiting frame (216) wrap around the four sides of the sphere (224). The limiting frame (216) has a ball drop hole (217) at the bottom of the sphere (224). The top of the limiting bracket (225) is in contact with the top of the sphere (224). The hanging rope (27) slides through the perforation at the top of the limiting bracket (225). The upper hollow tube (21) and the lower hollow tube (22) are fixed with a fixing plate (25) on the surface outside the rubber stopper (14). A rangefinder (214) is fixedly installed on the fixing plate (25). The rangefinders (214) of the upper hollow tube (21) and the lower hollow tube (22) correspond to the top and bottom of the rubber stopper (14), respectively.

2. The device for detecting the fullness of grouting sleeves based on the falling ball method according to claim 1, characterized in that, The end of the screw (29) away from the rubber stopper (14) is rotatably fitted with a ring (210), and a scale (211) is fixed at the bottom of the ring (210), which slides through the rubber stopper (14).

3. The device for detecting the fullness of grouting sleeves based on the falling ball method according to claim 2, characterized in that, An angular velocity sensor (28) is fixedly installed on the outer end of one side of the winding frame (26), and the angular velocity sensor (28) is connected to the winding shaft of the winding frame (26) via a drive. A disc (212) is rotatably connected to the other side of the winding frame (26), and the disc (212) is fixedly connected to the winding shaft of the winding frame (26). The disc (212) has a locking bolt (213) threaded onto its surface, and the locking bolt (213) is in contact with the outer side of the winding frame (26).

4. The device for detecting the fullness of grouting sleeves based on the falling ball method according to claim 1, characterized in that, The bottom of the lower hollow tube (22) is provided with a movable notch (215), the width of the connecting plate (219) is the same as that of the movable notch (215), and the inner and outer diameters of the limiting frame (216) are the same as those of the lower hollow tube (22).

5. The method for detecting the fullness of grouting sleeves based on the falling ball method implemented by the device according to claim 1, characterized in that: The detection method includes the following steps: (1) Based on the actual situation of the connecting sleeve, select the slurry outlet channel to drill and make the test channel. Seal the outer end of the slurry outlet channel with a rubber plug, and insert the upper half hollow tube and the lower half hollow tube of the test component through the rubber plug into the inside of the connecting sleeve. (2) The upper hollow tube is inserted into the inner wall of the connecting sleeve on the side away from the grout outlet. The insertion length of the upper hollow tube is measured, and the distance between the reinforcing bar and the inner wall of the connecting sleeve is calculated based on the outer diameter of the outer end reinforcing bar. (3) Pull the lower hollow tube outward so that the limiting frame and the ball drop point move to the space between the reinforcing bar and the inner wall of the connecting sleeve. Calculate the distance and rotate the screw at the outer end of the upper hollow tube to move the center position of the sealing plate to the axis position of the connecting sleeve. (4) Release the restriction of the rewinding frame, and the ball falls along the bottom of the limit frame. The hanging rope is unwound to maintain the connection with the ball. When the ball falls at a constant speed, the force value remains stable. When the force value decreases to 40% of the original force value, it can be considered that the ball has fallen to the bottom. At this time, measure the depth of the ball's descent and retrieve the ball. (5) Rotate the limiting frame and the ball 360 degrees with the position of the sealing plate, and take multiple measurements at different positions. The maximum value of the depth measured multiple times shall not exceed the design value, and the maximum and minimum values ​​shall not exceed 20% of the average value. Otherwise, it can be considered as not full.

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