Crack detection device for building structure safety

Abstract

The utility model relates to the technical field of crack detection, and discloses a crack detection device for building structure safety, which comprises an ultrasonic crack detector main body and two connecting wires, and further comprises a U-shaped frame, a U-shaped baffle is fixed in the middle of the interior of the U-shaped frame, a holding rod is fixed on one end surface, far away from the U-shaped frame, of the U-shaped baffle, a crack positioning assembly is arranged in the U-shaped baffle. According to the crack detection device for building structure safety, three threaded fixing holes formed in a guide rail correspond to three measurement point positions of a flat measurement method, a detection probe can be conveniently and rapidly adjusted to the corresponding detection point positions in a threaded fixing mode, scribing at the crack position is not needed, a Z-shaped abutting plate is inserted into the crack, and the crack detection device is convenient to use. And fine adjustment is carried out to fit the crack avoiding surface, so that the detection probes on the two sides can be symmetrically distributed about a crack pair symmetry point, and the reliability of crack depth detection can be improved.

Description

Technical Field

[0001] This utility model relates to the field of crack detection technology, specifically a crack detection device for building structural safety. Background Technology

[0002] In the field of building structural safety inspection, detecting the depth and direction of concrete cracks is a crucial step in assessing structural durability and safety. Among traditional crack detection methods, the planar measurement method, a non-destructive testing technique based on the principle of ultrasonic wave propagation, is widely used due to its advantages such as ease of operation and low cost. This method involves symmetrically arranging measuring points on both sides of the crack and using an ultrasonic testing instrument to measure the time difference of sound wave propagation through the crack, thereby estimating the crack depth.

[0003] The existing flat-surface measurement method requires inspectors to manually draw scale lines on the crack surface to mark the position of the measuring points, and draw a semi-circular positioning line at each measuring point to ensure that the measuring probe is in close contact with the crack surface. This process requires measurement, marking and calibration, and the line drawing process takes up a large proportion of time, which seriously restricts the detection efficiency. Moreover, the size and curvature of the semi-circular marking line must be strictly matched with the probe size. The operator's skill level directly affects the accuracy of the marking. Manual line drawing is prone to measurement point displacement due to operational errors, which directly affects the reliability of the detection results. Utility Model Content

[0004] The purpose of this invention is to provide a crack detection device for building structure safety, so as to solve the problems mentioned in the background art.

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

[0006] A crack detection device for building structure safety includes: an ultrasonic crack detector body and two connecting wires, and also includes: a U-shaped frame, a U-shaped baffle fixed in the middle of the U-shaped frame, a handle fixed on the end face of the U-shaped baffle away from the U-shaped frame, and a crack positioning component disposed inside the U-shaped baffle;

[0007] Inside the U-shaped frame and on both sides of the U-shaped baffle, there are guide rails fixed. Locking seats are slidably installed on the guide rails. The top of the locking seats is provided with locking holes for locking the detection probe.

[0008] The locking seat has a sliding block fixed on one end face near the guide rail. The top of the guide rail has three threaded fixing holes. The middle of the top of the slider has a through hole. The slider is provided with a first wing bolt that is threadedly connected to the threaded fixing hole through the through hole.

[0009] As an improved technical solution, the ultrasonic crack detector body has two plug-in interfaces at both ends, and connecting wires are fixedly provided between the two interfaces and the two detection probes.

[0010] As an improved technical solution, a third bubble level is fixedly installed in the middle of the front of the U-shaped frame, and a second bubble level is fixed in the middle of the top of the U-shaped frame.

[0011] As an improved technical solution, the threaded fixing holes on the guide rails on both sides are symmetrically distributed with U-shaped baffles, and the threaded fixing holes on both sides are spaced 50mm, 100mm and 200mm apart from the inside to the outside.

[0012] As an improved technical solution, an internally threaded sleeve is fixed in the middle of the end face of the locking seat away from the slider. A second wing bolt is threaded on the internally threaded sleeve, and a locking hole for the second wing bolt to pass through is opened at the position of the locking seat opposite to the second wing bolt. A rubber block is glued to one end of the second wing bolt located in the locking hole.

[0013] As an improved technical solution, the crack positioning component includes a smooth rod fixed inside a U-shaped baffle and a bidirectional lead screw rotatably mounted inside the U-shaped baffle via bearings. A transmission bar is provided on both sides between the smooth rod and the bidirectional lead screw. One end of the transmission bar has a sliding hole for the smooth rod to pass through, and the other end of the transmission bar has a threaded hole for threaded connection with the bidirectional lead screw.

[0014] As an improved technical solution, the crack positioning assembly further includes a drive shaft that rotates between the U-shaped baffle and the grip, and a bevel gear transmission component is installed between the drive shaft and the bidirectional lead screw.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses a threaded locking method to detachably install the detection probe inside the locking hole. This facilitates both replacement and maintenance of the detection probe, and allows for quick installation and removal of the probe from the locking hole, making it convenient for the user. Simultaneously, the rubber block adheres to the outer wall of the detection probe, ensuring a complete fit and increasing the contact area and friction coefficient, thereby enhancing the probe's installation stability. Furthermore, it prevents rigid contact between the crack positioning component and the detection probe, protecting the probe.

[0017] 2. This invention inserts a Z-shaped contact plate into the crack, symmetrically distributing the detection probes on both sides with the crack as the symmetrical point. Under the lateral transmission action of the threaded hole on the threaded hole of the bidirectional screw, the distance between the two transmission bars on both sides is widened, thereby separating the two Z-shaped contact plates that are attached together and moving them towards the side wall of the crack. This allows the Z-shaped contact plates to adhere to the side wall, and the detection probes on both sides to be symmetrically distributed with the midpoint of the crack as the symmetrical point, improving the accuracy of the symmetrical distribution of the detection probes on both sides with the crack as the symmetrical point, thereby improving the measurement effect.

[0018] 3. This utility model uses three threaded fixing holes on the guide rail to correspond to the three measurement points of the flat measurement method. The threaded fixing method facilitates the quick adjustment of the detection probe to the corresponding detection point, eliminating the need for scribing at the crack. This avoids the time-consuming process of scribing and effectively prevents measurement errors caused by scribing. Furthermore, inserting the Z-shaped contact plate into the crack and fine-tuning it to fit the crack surface helps to ensure that the detection probes on both sides are symmetrically distributed with respect to the crack, thereby improving the reliability of crack depth detection. At the same time, a bubble level is provided to observe whether the detection probe is tilted, further improving the detection effect and measurement efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of a crack detection device for building structural safety;

[0020] Figure 2 A schematic diagram of a U-shaped frame in a crack detection device for building structural safety.

[0021] Figure 3 A schematic diagram of a crack location component in a crack detection device for building structural safety.

[0022] Figure 4 This is a schematic diagram of the Z-shaped contact plates on both sides in a crack detection device for building structural safety.

[0023] Figure 5 This is a schematic diagram of the locking seat in a crack detection device for building structural safety.

[0024] In the diagram: 1. Main body of the ultrasonic crack detector; 2. Interface; 3. Connecting wire; 4. Detection probe; 5. U-shaped frame; 6. Second bubble level; 7. Third bubble level; 8. U-shaped baffle; 9. Crack positioning component; 91. Smooth rod; 92. Bidirectional lead screw; 93. Bevel gear transmission component; 94. Drive shaft; 95. Transmission bar; 96. Z-shaped contact plate; 10. Handle; 11. Threaded fixing hole; 12. Guide rail; 13. Slider; 14. First wing bolt; 15. Locking seat; 16. Locking hole; 17. Communicating through hole; 18. Internal threaded sleeve; 19. Second wing bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 This utility model proposes a technical solution: a crack detection device for building structure safety, comprising: an ultrasonic crack detector body 1 and two connecting wires 3, and further comprising: a U-shaped frame 5, a U-shaped baffle 8 fixed in the middle of the U-shaped frame 5, a handle 10 fixed on the end face of the U-shaped baffle 8 away from the U-shaped frame 5, a crack positioning component 9 disposed inside the U-shaped baffle 8, and the driving end of the crack positioning component 9 passing through the handle 10 and located at the end of the handle 10 away from the U-shaped baffle 8;

[0027] Inside the U-shaped frame 5 and on both sides of the U-shaped baffle 8, there are guide rails 12 fixed. Locking seats 15 are slidably installed on the guide rails 12. The top of the locking seat 15 is provided with a locking hole 16 for locking the detection probe 4.

[0028] A sliding block 13 is fixed to one end face of the locking seat 15 near the guide rail 12. The top of the guide rail 12 has three threaded fixing holes 11. The middle of the top of the slider 13 has a through hole 17. The slider 13 is provided with a first wing bolt 14 that is threaded to the threaded fixing holes 11 through the through hole 17. After the first wing bolt 14 passes through the through hole 17 and is threaded to the threaded fixing holes 11, the slider 13 can be fixed on the guide rail 12 and the position of the connecting wire 3 can be adjusted. The threaded fixing makes it easy to quickly adjust the position of the connecting wire 3.

[0029] The three threaded fixing holes 11 on the guide rail 12 correspond to the three measurement points of the planar measurement method. The threaded fixing method facilitates the quick adjustment of the detection probe 4 to the corresponding detection point, eliminating the need for scribing at the crack. This avoids the time-consuming process of scribing and effectively prevents measurement errors caused by scribing. Furthermore, the Z-shaped contact plate 96 is inserted into the crack and finely adjusted to fit the crack surface, which helps to make the detection probes 4 on both sides symmetrically distributed with respect to the crack, thereby improving the reliability of crack depth detection. At the same time, a second bubble level 6 is provided to observe whether the detection probe 4 is tilted, further improving the detection effect and measurement efficiency.

[0030] The main body 1 of the ultrasonic crack detector has two ports connected to interfaces 2, and connecting wires 3 are fixed between the two interfaces 2 and the two detection probes 4.

[0031] A third bubble level 7 is fixedly installed in the middle of the front of the U-shaped frame 5, and a second bubble level 6 is fixed in the middle of the top of the U-shaped frame 5. The second bubble level 6 and the third bubble level 7 can be used to observe whether the U-shaped frame 5 is in a horizontal state, so as to avoid the detection probe 4 from falling off the preset detection point when the U-shaped frame 5 is tilted, thereby further improving the accuracy of crack detection.

[0032] The threaded fixing holes 11 on the two guide rails 12 are symmetrically distributed with U-shaped baffles 8. The threaded fixing holes 11 symmetrically arranged on both sides are spaced 50mm, 100mm and 200mm apart from the inside to the outside. Each guide rail 12 has a threaded fixing hole 11. The threaded fixing holes 11 symmetrically arranged on both sides correspond to three detection points of 50mm, 100mm and 200mm respectively. When symmetrically adjusting the detection probes 4 on both sides, the detection probes 4 can be quickly adjusted to the detection points without the need for auxiliary scribing and positioning before detection, thus reducing the cumbersomeness of detection.

[0033] An internally threaded sleeve 18 is fixed to the middle of the end face of the locking seat 15 away from the slider 13. A second wing bolt 19 is threaded onto the internally threaded sleeve 18. A locking through hole is provided on the locking seat 15 opposite to the position of the second wing bolt 19 for the second wing bolt 19 to pass through. A rubber block is bonded to one end of the second wing bolt 19 located in the locking through hole. The detection probe 4 is detachably installed inside the locking hole 16 by means of threaded locking. This facilitates the replacement and maintenance of the detection probe 4 and the quick installation and removal of the detection probe 4 inside the locking hole 16, making it convenient for users. At the same time, the rubber block fits against the outer wall surface of the detection probe 4, which can completely fit against the outer wall surface of the detection probe 4, thereby increasing the contact area and friction coefficient, and thus improving the firmness of the installation of the detection probe 4. On the other hand, it also avoids rigid contact between the crack positioning component 9 and the detection probe 4, thus protecting the detection probe 4.

[0034] The crack positioning component 9 includes a smooth rod 91 fixed inside the U-shaped baffle 8 and a bidirectional lead screw 92 rotatably mounted inside the U-shaped baffle 8 via bearings. A transmission bar 95 is provided on both sides between the smooth rod 91 and the bidirectional lead screw 92. One end of the transmission bar 95 has a sliding hole for the smooth rod 91 to pass through, and the other end of the transmission bar 95 has a threaded hole for threaded connection with the bidirectional lead screw 92. A Z-shaped abutment plate 96 is fixed on the back of the transmission bar 95, and the two Z-shaped abutment plates 96 are in abutting state.

[0035] The crack positioning assembly 9 also includes a drive shaft 94 that rotates between the U-shaped baffle 8 and the grip 10. The end of the drive shaft 94 away from the transmission bar 95 passes through the grip 10 and is located at the end of the grip 10 away from the U-shaped baffle 8. A knob is installed at the end of the drive shaft 94 away from the transmission bar 95. A bevel gear transmission component 93 is installed between the drive shaft 94 and the double-acting lead screw 92. The bevel gear transmission component 93 consists of two meshing bevel gears, one of which is installed on the double-acting lead screw 92 and the other is installed on the drive shaft 94.

[0036] The drive shaft 94 is rotated by a knob, and under the transmission action of the bevel gear transmission component 93, the double-acting lead screw 92 is rotated. Under the lateral transmission action of the double-acting lead screw 92 and the threaded hole on the transmission bar 95, the distance between the two transmission bars 95 on both sides is widened, thereby separating the two Z-shaped contact plates 96 that are attached together and moving them towards the side wall of the crack, so that the Z-shaped contact plates 96 are attached to the side wall, and the two detection probes 4 on both sides are symmetrically distributed with the midpoint of the crack as the symmetrical point, thereby improving the accuracy of the symmetrical distribution of the two detection probes 4 with the crack as the symmetrical point, thereby improving the measurement effect. The thread drive facilitates quick separation and attachment.

[0037] The working principle of this utility model is as follows:

[0038] When in use, the procedure for fixing the detection probe 4 to the locking seat 15 is as follows:

[0039] The detection probe 4 is passed through the inside of the locking hole 16, and then the second wing bolt 19 is screwed into the inside of the internal thread sleeve 18. The second wing bolt 19 is moved toward the detection probe 4 and the rubber block abuts against the detection probe 4, locking the locking hole 16 in place.

[0040] Then, the interface 2 is plugged into the socket of the ultrasonic crack detector body 1 to realize communication between the detection probe 4 and the ultrasonic crack detector body 1.

[0041] The spacing between the connecting wires 3 on both sides is adjusted as follows: the slider 13 can move horizontally along the guide rail 12, and the connecting hole 17 on the slider 13 can be aligned with the threaded fixing hole 11 at different positions. Then, the first butterfly bolt 14 passes through the connecting hole 17 and is threadedly connected to the threaded fixing hole 11 to fix the slider 13 on the guide rail 12 and realize the adjustment of the position of the connecting wire 3.

[0042] After adjusting the position of the detection probe 4, hold the threaded fixing hole 11 and attach the detection probe 4 to the concrete crack surface. At this time, insert the Z-shaped contact plate 96 into the crack so that the detection probes 4 on both sides are symmetrically distributed with the crack as the symmetrical point.

[0043] The drive shaft 94 is rotated by the knob, and under the transmission action of the bevel gear transmission component 93, the double-acting lead screw 92 is rotated. Under the transverse transmission action of the double-acting lead screw 92 and the threaded hole on the transmission bar 95, the distance between the two transmission bars 95 is widened, thereby separating the two Z-shaped contact plates 96 that are attached together and moving them toward the side wall of the crack, so that the Z-shaped contact plates 96 are attached to the side wall, and the detection probes 4 on both sides are symmetrically distributed with the midpoint of the crack as the symmetrical point.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crack detection device for building structural safety, comprising: The ultrasonic crack detector body (1) and two connecting wires (3) are characterized in that: it further includes: a U-shaped frame (5), a U-shaped baffle (8) is fixed in the middle of the U-shaped frame (5), a handle (10) is fixed on the end face of the U-shaped baffle (8) away from the U-shaped frame (5), and a crack positioning component (9) is provided inside the U-shaped baffle (8); Inside the U-shaped frame (5) and on both sides of the U-shaped baffle (8), there are guide rails (12). A locking seat (15) is slidably installed on the guide rail (12). The top of the locking seat (15) is provided with a locking hole (16) for locking the detection probe (4). The locking seat (15) has a sliding block (13) fixed on one end face of the guide rail (12) near the guide rail (12). The top of the guide rail (12) has three threaded fixing holes (11). The middle of the top of the slider (13) has a through hole (17). The slider (13) is provided with a first wing bolt (14) that is threadedly connected to the threaded fixing holes (11) through the through hole (17).

2. The crack detection device for building structure safety according to claim 1, characterized in that: The ultrasonic crack detector body (1) has two ports connected to interfaces (2), and connecting wires (3) are fixed between the two interfaces (2) and the two detection probes (4).

3. The crack detection device for building structure safety according to claim 2, characterized in that: A third bubble level (7) is fixedly installed in the middle of the front of the U-shaped frame (5), and a second bubble level (6) is fixed in the middle of the top of the U-shaped frame (5).

4. A crack detection device for building structural safety according to claim 3, characterized in that: The threaded fixing holes (11) on the guide rails (12) on both sides are symmetrically distributed with U-shaped baffles (8). The threaded fixing holes (11) on both sides are symmetrically arranged with a spacing of 50mm, 100mm and 200mm from the inside to the outside.

5. A crack detection device for building structure safety according to claim 4, characterized in that: An internally threaded sleeve (18) is fixed at the middle of the end face of the locking seat (15) away from the slider (13). A second wing bolt (19) is threaded on the internally threaded sleeve (18), and a locking hole for the second wing bolt (19) is opened at the position of the locking seat (15) opposite to the second wing bolt (19). A rubber block is glued to one end of the second wing bolt (19) located in the locking hole.

6. A crack detection device for building structural safety according to claim 5, characterized in that: The crack positioning component (9) includes a smooth rod (91) fixed inside the U-shaped baffle (8) and a bidirectional lead screw (92) rotatably mounted inside the U-shaped baffle (8) via a bearing. A transmission bar (95) is provided on both sides between the smooth rod (91) and the bidirectional lead screw (92). One end of the transmission bar (95) is provided with a sliding hole for the smooth rod (91) to pass through, and the other end of the transmission bar (95) is provided with a threaded hole that is threadedly connected to the bidirectional lead screw (92).

7. A crack detection device for building structural safety according to claim 6, characterized in that: The crack positioning assembly (9) also includes a drive shaft (94) that rotates between the U-shaped baffle (8) and the grip (10), and a bevel gear transmission (93) is installed between the drive shaft (94) and the two-way lead screw (92).

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