Crack Detection Equipment for Engineering Quality Inspection and Its Usage Method

Abstract

The present invention relates to a crack detection device for engineering quality inspection and its usage method, including a clamping assembly for clamping a detection probe. The clamping assembly includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve. The lower ends of the inner sleeve and the outer sleeve are located on the same plane. A support ring is arranged between the inner sleeve and the outer sleeve. The inner ring surface and the outer ring surface of the support ring are respectively connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve. A plurality of through holes are formed in the support ring. A plurality of notches are formed at the lower end of the inner sleeve. A retaining ring for supporting and limiting the detection probe is arranged on the inner wall of the lower end of the inner sleeve. The support ring is located above the notches. With this technical solution, during the detection process, the clamped detection probe can be pushed to move, and the detection surface between the detection probe and the object to be detected can always be in a state filled with a coupling agent, enabling continuous detection along the length direction of a linear structure.

Description

Technical Field

[0001] The present invention relates to the technical field of building detection, and particularly relates to a crack detection device for engineering quality detection and its using method. Background Art

[0002] Concrete cracks are caused by the physical structure changes of concrete structures due to the action of internal and external factors. Concrete cracks are the main reasons for the reduction of the bearing capacity, durability and waterproofness of concrete structures, and their quantity, type and size are important indicators for the stability analysis of concrete buildings.

[0003] Ultrasonic flaw detection is a widely used detection method at present. In the detection process, in order to improve the adhesion between the concrete surface and the ultrasonic probe, a coupling agent needs to be applied between the concrete surface and the ultrasonic probe to fill the contact gap. After each change of the measurement position, the coupling agent needs to be applied again. Each single measurement can only measure a certain point. If continuous detection is required along the length direction of a linear structure, multiple measurement operations need to be carried out along the length direction of the linear structure. And multiple measurement operations will form multiple measurement parts. Moreover, since the specific positions of multiple detection parts are judged by manual calibration, there will be situations where multiple measurement parts overlap or there are breakpoints. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a crack detection device for engineering quality detection, so as to solve the problem that in the prior art, when continuous detection is required along the length direction of a linear structure, multiple measurement operations need to be carried out along the length direction of the linear structure, and there will be situations where multiple measurement parts of multiple measurement operations overlap or there are breakpoints.

[0005] The present invention is realized through the following technical solutions:

[0006] A crack detection device for engineering quality detection includes a clamping assembly for clamping a detection probe. The clamping assembly includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve. The lower ends of the inner sleeve and the outer sleeve are located on the same plane. A support ring is arranged between the inner sleeve and the outer sleeve. The inner ring surface and the outer ring surface of the support ring are respectively connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve. A plurality of through holes are opened on the support ring. A plurality of notches are opened at the lower end of the inner sleeve. A retaining ring for supporting and limiting the detection probe is arranged on the inner wall of the lower end of the inner sleeve. The support ring is located above the notch.

[0007] Further defined, a protective sleeve is sleeved outside the inner sleeve, and the lower end of the protective sleeve is detachably connected to the upper end of the outer sleeve.

[0008] Further defined, a sealing ring is arranged between the inner sleeve and the protective sleeve, and the inner ring surface and the outer ring surface of the sealing ring are respectively in sealing cooperation with the outer wall of the outer sleeve and the inner wall of the protective sleeve, and can slide along the length direction of the outer sleeve.

[0009] Further defined, a filling hole penetrating along the thickness direction is formed in the sealing ring, a filling pipe extending upward is arranged on the filling hole, the lower end of the filling pipe is connected to the filling hole, and a sealing cover is arranged at the upper end of the filling pipe, and the sealing cover is detachably connected to the upper end of the filling pipe.

[0010] Further defined, annular grooves are formed on both the inner ring surface and the outer ring surface of the sealing ring, and sealing rings are arranged in the annular grooves.

[0011] Further defined, it further includes an annular support plate and tracks clamped on both sides of the annular support plate. The inner diameter of the annular support plate is equal to the inner diameter of the inner sleeve, and the top surface of the annular support plate is in sealing cooperation with the lower ends of the inner sleeve and the outer sleeve. A plurality of blade plates inserted between the lower ends of the inner sleeve and the outer sleeve are arranged on the annular support plate. The lower ends of the plurality of blade plates are all connected to the annular support plate, and the upper ends incline to the same side. The two side edges of the blade plate are respectively in sealing cooperation with the outer wall of the inner sleeve and the inner wall of the outer sleeve, and the top edge of the blade plate is in sealing cooperation with the bottom surface of the support ring;

[0012] The outer edge of the annular support plate extends outward and is provided with a connecting ring extending upward and surrounding the outer sleeve. The outer wall of the connecting ring is provided with an external gear ring and a protruding limiting ring;

[0013] The track includes two parallel sliding rails and two connecting plates respectively connecting the two ends of the two sliding rails. The bottom surfaces of the two sliding rails are on the same plane as the bottom surface of the annular support plate. Limiting grooves extending along the length direction are formed on the inner side surfaces of the two sliding rails, and are clamped with the limiting ring through the limiting grooves. A rack meshing with the external gear ring is arranged on the inner side surface of one of the sliding rails.

[0014] Further defined, a support bearing is arranged between the connecting ring and the outer sleeve.

[0015] Further defined, a reinforcing ring extending upward and abuting against the inner wall of the outer sleeve is arranged on the support ring, and the reinforcing ring is connected to the outer side edges of a plurality of blade plates.

[0016] A usage method of a crack detection device for engineering quality detection includes:

[0017] Step 1, cleaning the surface of the object to be detected;

[0018] Plan a detection track on the surface of the object to be detected, and remove foreign matters on the surface of the object to be detected along the detection track;

[0019] Step 2, laying the track;

[0020] On the surface of the detected object after cleaning, and then lay the tracks along the detection track for the two slide rails;

[0021] Step Three: Instrument assembly;

[0022] Insert the detection probe into the inner sleeve, make the lower edge of the detection probe abut against the retaining ring, and then fix the detection probe within the inner sleeve;

[0023] Step Four: Instrument installation;

[0024] First, inject the coupling agent from the upper end of the filling tube to make the coupling agent fill the space between the outer sleeve and the inner sleeve, the space between the port at the lower end of the inner sleeve and the detection probe, and the space between the protective sleeve and the outer sleeve;

[0025] Then, place it in a mating state between the two slide rails, make the two sides of the limiting ring respectively fit and engage with the two limiting grooves, and make the external gear ring and the rack in a meshing state. Finally, assemble and connect the two slide rails;

[0026] Step Five: Hold and push the protective sleeve to make the detection probe slide along the extending direction of the track.

[0027] Further defined, the foreign matters removed include the weathered layer on the surface of the detected object.

[0028] The beneficial effects of the present invention are as follows:

[0029] For the crack detection device for engineering quality detection and its usage method, by filling the space between the port at the lower end of the inner sleeve and the detection probe with the coupling agent, when the coupling agent in this space decreases, under the action of gravity, the coupling agent in the space between the inner sleeve and the outer sleeve will flow into this space, which will play a supplementary role in the coupling agent in this space, making the coupling agent in this space remain full. In addition, since this space is a relatively sealed space, the reduction of the coupling agent in it will form a certain negative pressure, and the formed negative pressure is conducive to assisting the coupling agent in the space between the inner sleeve and the outer sleeve to flow into this space. Through the above structure, during the detection process, the clamped detection probe can be pushed to move, and it can be ensured that the detection surface between the detection probe and the detected object is always filled with the coupling agent, and continuous detection can be carried out along the length direction of the linear structure.

[0030] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Description of the Drawings

[0031] Figure 1 is the three-dimensional view of the crack detection device for engineering quality inspection of the present invention Figure 1 ;

[0032] Figure 2 is the three-dimensional view of the crack detection device for engineering quality inspection of the present invention Figure 2 ;

[0033] Figure 3 is the front view of the crack detection device for engineering quality inspection of the present invention;

[0034] Figure 4 is Figure 3 the schematic cross-sectional structure view of A-A in

[0035] Figure 5 is Figure 4 the enlarged view of B in

[0036] Figure 6 is the schematic connection structure view of the inner sleeve and the outer sleeve;

[0037] Figure 7 is the schematic structure view of the annular support plate;

[0038] In the figure: 1, inner sleeve; 2, outer sleeve; 3, support ring; 4, through hole; 5, notch; 6, retaining ring; 7, protective sleeve; 8, sealing ring; 9, filling pipe; 10, sealing cover; 11, sealing ring; 12, annular support plate; 13, blade; 14, connecting ring; 15, external gear ring; 16, limiting ring; 17, limiting groove; 18, rack; 19, support bearing; 20, reinforcement ring; 21, slide rail; 22, connecting plate. Specific embodiments

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the above description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "one side" and "the other side" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0043] In addition, terms such as "identical" do not mean that the components are required to be absolutely identical, but there may be slight differences. The term "vertical" only means that the positional relationship between components is relatively more vertical than "parallel", and does not mean that the structure must be completely vertical, but may be slightly inclined.

[0044] Please refer to Figures 1-7 , the present invention provides a technical solution: a crack detection device for engineering quality inspection, including a clamping assembly for clamping a detection probe. The clamping assembly includes an inner sleeve 1 and an outer sleeve 2 sleeved outside the inner sleeve 1. The lower ends of the inner sleeve 1 and the outer sleeve 2 are located on the same plane. A support ring 3 is arranged between the inner sleeve 1 and the outer sleeve 2. The inner ring surface and the outer ring surface of the support ring 3 are respectively connected to the outer wall of the inner sleeve 1 and the inner wall of the outer sleeve 2. A plurality of through holes 4 are formed in the support ring 3. A plurality of notches 5 are formed at the lower end of the inner sleeve 1. A retaining ring 6 for supporting and limiting the detection probe is arranged on the inner wall of the lower end of the inner sleeve 1. The support ring 3 is located above the notch 5.

[0045] The inner sleeve 1 is used for installing the detection probe. The detection probe is inserted into the inner sleeve 1 and is supported by the retaining ring 6 arranged on the inner wall of the lower end of the inner sleeve 1. The outer sleeve 2 is sleeved outside the inner sleeve 1. There is a space for accommodating the coupling agent between the two. And the two are connected by the support ring 3 to divide the space between the outer sleeve 2 and the inner sleeve 1 into upper and lower parts, and a plurality of through holes 4 formed in the support ring 3 are used to communicate the upper and lower part spaces of the support ring 3. The through holes 4 will serve as channels for the coupling agent in the upper part space to flow downward;

[0046] During use, first inject the coupling agent to fill the space between the inner sleeve 1 and the outer sleeve 2, and apply it to the detection probe, so that the space between the lower end port of the inner sleeve 1 and the detection probe is filled with the coupling agent. Then, press the lower end of the inner sleeve 1 against the detection surface of the object to be detected. Then, push the inner sleeve 1 to move the inner sleeve 1 on the detection surface of the object to be detected. The coupling agent between the lower end port of the inner sleeve 1 and the detection probe will contact the detection surface of the object to be detected and will remain on the detection surface of the object to be detected during the movement. When this part of the space is buckled on the detection surface of the object to be detected, a sealed space will be formed, and this space is communicated with the space between the inner tube body and the outer tube body through the notch 5. When the coupling agent in this space decreases, under the action of gravity, the coupling agent in the space between the inner sleeve 1 and the outer sleeve 2 will flow into this space, which will supplement the coupling agent in this space and keep the coupling agent in this space full. In addition, since this space is a relatively sealed space, the reduction of the coupling agent inside it will form a certain negative pressure, and the formed negative pressure is beneficial to assisting the coupling agent in the space between the inner sleeve 1 and the outer sleeve 2 to flow into this space. Through the above structure, during the detection process, the clamped detection probe can be pushed to move, and the space between the detection probe and the detection surface of the object to be detected can always be filled with the coupling agent, and the linear structure can be continuously detected along the length direction.

[0047] In this embodiment, a protective sleeve 7 is sleeved outside the inner sleeve 1, and the lower end of the protective sleeve 7 is detachably connected to the upper end of the outer sleeve 2.

[0048] As an extension of the structure of the outer sleeve 2, the lower end of the protective sleeve 7 can be connected to the upper end of the outer sleeve 2 by threaded cooperation or directly sleeved, so that the space for storing the coupling agent between the outer sleeve 2 and the inner sleeve 1 is expanded, and the amount of the coupling agent that can be stored in the initial state is increased.

[0049] In this embodiment, a sealing ring 8 is arranged between the inner sleeve 1 and the protective sleeve 7. The inner ring surface and the outer ring surface of the sealing ring 8 are respectively in sealing cooperation with the outer wall of the outer sleeve 2 and the inner wall of the protective sleeve 7, and can slide along the length direction of the outer sleeve 2.

[0050] The sealing ring 8 is slidably fitted between the protective sleeve 7 and the inner sleeve 1 and is respectively in sealing cooperation with the protective sleeve 7 and the inner sleeve 1. When the coupling agent between the inner sleeve 1 and the protective sleeve 7 decreases, a certain negative pressure will be formed, and the sealing ring 8 will move downward under the action of gravity and negative pressure. During the movement, the coupling agent attached to the inner wall of the protective sleeve 7 and the outer wall of the inner sleeve 1 can be removed, reducing the residue of the coupling agent between the inner wall of the protective sleeve 7 and the outer wall of the inner sleeve 1.

[0051] In this embodiment, a filling hole penetrating along the thickness direction is formed in the sealing ring 8, a filling pipe 9 extending upward is arranged on the filling hole, the lower end of the filling pipe 9 is connected to the filling hole, a sealing cover 10 is arranged at the upper end of the filling pipe 9, and the sealing cover 10 is detachably connected to the upper end of the filling pipe 9.

[0052] The filling pipe 9 is connected to the filling hole. As the filling structure of the coupling agent, the filling pipe 9 can directly inject the coupling agent into the space below the sealing ring 8. After the filling is completed, the upper end of the filling pipe 9 can be sealed through the sealing cover 10. During use, as the coupling agent is consumed, the sealing ring 8 will gradually move downward, and the filling pipe 9 will also move downward during the movement. The remaining amount of the coupling agent can be judged through the position change of the filling pipe 9.

[0053] In this embodiment, annular grooves are formed on both the inner ring surface and the outer ring surface of the sealing ring 8, and sealing rings 11 are arranged in the annular grooves, which can improve the sealing effect between the sealing ring 8 and the inner wall of the protective sleeve 7 and the outer wall of the inner sleeve 1.

[0054] In this embodiment, it further includes an annular support plate 12 and tracks clamped on both sides of the annular support plate 12. The inner diameter of the annular support plate 12 is equal to the inner diameter of the inner sleeve 1, and the top surface of the annular support plate 12 is in sealed cooperation with the lower ends of the inner sleeve 1 and the outer sleeve 2. A plurality of blade plates 13 inserted between the lower ends of the inner sleeve 1 and the outer sleeve 2 are arranged on the annular support plate 12. The lower ends of the plurality of blade plates 13 are all connected to the annular support plate 12, and the upper ends incline to the same side. The two side edges of the blade plate 13 are in sealed cooperation with the outer wall of the inner sleeve 1 and the inner wall of the outer sleeve 2 respectively, and the top edge of the blade plate 13 is in sealed cooperation with the bottom surface of the support ring 3;

[0055] The outer edge of the annular support plate 12 extends outward and is provided with a connecting ring 14 extending upward and surrounding the outer sleeve 2. An external gear ring 15 and a protruding limiting ring 16 are arranged on the outer wall of the connecting ring 14;

[0056] The track includes two parallel slide rails 21 and two connecting plates 22 respectively connecting the two ends of the two slide rails 21. The bottom surfaces of the two slide rails 21 are on the same plane as the bottom surface of the annular support plate 12. Limiting grooves 17 extending along the length direction are formed on the inner side surfaces of the two slide rails 21, and are clamped with the limiting ring 16 through the limiting grooves 17. A rack 18 meshing with the external gear ring 15 is arranged on the inner side surface of one of the slide rails 21.

[0057] The track is composed of two slide rails 21 and a connecting plate 22 located between the two ends of the two slide rails 21 to form a frame structure. The annular support plate 12 is clamped with the limit ring 16 through the limit grooves 17 on the two slide rails 21 to serve as the sliding support of the annular support plate 12. And on one of the slide rails 21, a rack 18 meshing with the external gear ring 15 is arranged. When the inner sleeve 1 is pushed to move, the annular support plate 12 will move along the track synchronously with the inner sleeve 1. Due to the fact that the annular support plate 12 and the inner sleeve 1 are in an active cooperation state and one side of it is in a meshing state with the rack 18 through the external gear ring 15, it will rotate synchronously under the pushing action of the rack 18 during the movement. A plurality of blade plates 13 arranged on it will also rotate synchronously. When the plurality of blade plates 13 rotate, an impeller structure will be formed, which is used to assist in pushing the coupling agent to flow downward into the space between the port at the lower end of the inner sleeve 1 and the detection probe, so that the space between the detection probe and the surface of the object to be detected is always filled with the coupling agent.

[0058] In this embodiment, a support bearing 19 is arranged between the connecting ring 14 and the outer sleeve 2. The inner ring and the outer ring of the support bearing 19 are respectively clamped and fixed with the outer sleeve 2 and the connecting ring 14 to serve as the rotational support structure of the two, so as to reduce the friction when the two rotate relatively.

[0059] In this embodiment, a reinforcing ring 20 extending upward along the inner wall of the outer sleeve 2 is arranged on the support ring 3. The reinforcing ring 20 is connected to the outer side edges of a plurality of blade plates 13. The reinforcing ring 20 serves as an extended structure of the support ring 3, and it will serve as the installation foundation for the outer side edges of the blade plates 13, which can improve the structural strength of the blade plates 13 on the support ring 3.

[0060] A usage method of a crack detection device for engineering quality detection includes:

[0061] Step 1, cleaning the surface of the object to be detected;

[0062] Plan the detection track on the surface of the object to be detected, and remove the foreign matters on the surface of the object to be detected along the detection track. The removed foreign matters include the weathered layer, moss, and attached dust on the surface of the object to be detected, etc., so that the surface of the object to be detected is in a solid state in the initial state of concrete.

[0063] Step 2, laying the track;

[0064] On the surface of the object to be detected after cleaning, then lay the two slide rails 21 along the detection track.

[0065] Step 3, assembling the instrument;

[0066] Insert the detection probe into the inner sleeve 1, make the lower edge of the detection probe abut against the retaining ring 6, and then fix the detection probe in the inner sleeve 1.

[0067] Step 4, installing the instrument;

[0068] First, inject the coupling agent from the upper end of the filling tube 9 so that the coupling agent fills the space between the outer sleeve 2 and the inner sleeve 1, the space between the port at the lower end of the inner sleeve 1 and the detection probe, and the space between the protective sleeve 7 and the outer sleeve 2;

[0069] Then, place it in a mating state between the two slide rails 21, so that both sides of the limit ring 16 are respectively engaged and clamped with the two limit grooves 17, and the external gear ring 15 and the rack 18 are in an engaged state. Finally, assemble and connect the two slide rails 21;

[0070] Step Five: Hold and push the protective sleeve 7 to make the detection probe slide along the extending direction of the track.

[0071] In this method, the track is used as the constraint structure of the detection path, and through the impeller structure formed by several blade plates 13 arranged on the annular support plate 12, the coupling agent is forced to flow, so that the coupling agent flows into the space between the port at the lower end of the inner sleeve 1 and the detection probe, which will supplement the coupling agent in the space between the port at the lower end of the inner sleeve 1 and the detection probe, and keep the space between the port at the lower end of the inner sleeve 1 and the detection probe filled with the coupling agent. Since the space between the port at the lower end of the inner sleeve 1 and the detection probe is a relatively sealed space, the reduction of the coupling agent therein will form a certain negative pressure, and the formed negative pressure is beneficial to assisting the coupling agent in the space between the inner sleeve 1 and the outer sleeve 2 to flow into this space. During the detection process, it can push the clamped detection probe to move, and can keep the detection surface between the detection probe and the object to be detected always filled with the coupling agent, and can continuously detect the length direction of the linear structure.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A crack detection device for engineering quality inspection, comprising a clamping assembly for clamping a detection probe, characterized in that: The clamping assembly comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve, the lower end of the inner sleeve and the lower end of the outer sleeve are located on the same plane, a support ring is arranged between the inner sleeve and the outer sleeve, the inner ring surface and the outer ring surface of the support ring are respectively connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve, a plurality of through holes are opened on the support ring, a plurality of notches are opened at the lower end of the inner sleeve, a retaining ring for supporting and limiting the detection probe is arranged on the inner wall of the lower end of the inner sleeve, and the support ring is located above the notch; The inner sleeve is outer-connected with a protective sleeve, and the lower end of the protective sleeve is detachably connected to the upper end of the outer sleeve; A sealing ring is provided between the inner sleeve and the protective sleeve, the inner ring surface and the outer ring surface of the sealing ring are respectively sealed with the outer wall of the outer sleeve and the inner wall of the protective sleeve, and can slide along the length direction of the outer sleeve; The sealing ring is provided with a filling hole penetrating along the thickness direction, the filling hole is provided with a filling pipe extending upward, the lower end of the filling pipe is connected to the filling hole, and the upper end is provided with a sealing cover, and the sealing cover is detachably connected to the upper end of the filling pipe.

2. The crack detection device for engineering quality inspection according to claim 1 is characterized in that: An annular groove is provided on the inner ring surface and the outer ring surface of the sealing ring, and a sealing ring is arranged in the annular groove.

3. The crack detection device for engineering quality inspection according to claim 1 or 2, characterized in that: It also includes an annular support plate and rails clamped on both sides of the annular support plate, the inner diameter of the annular support plate is equal to the inner diameter of the inner sleeve, and the top surface of the annular support plate is sealed with the lower end of the inner sleeve and the lower end of the outer sleeve, and the annular support plate is provided with a plurality of blades inserted between the lower end of the inner sleeve and the lower end of the outer sleeve, the lower ends of the plurality of blades are connected to the annular support plate, and the upper ends are inclined to the same side, the two side edges of the blades are respectively sealed with the outer wall of the inner sleeve and the inner wall of the outer sleeve, and the top edge of the blade is sealed with the bottom surface of the support ring; The outer edge of the annular support plate extends outward and is provided with a connecting ring extending upward and surrounding the outer sleeve, and the outer wall of the connecting ring is provided with an outer gear ring and a limiting ring protruding outward; The track includes two parallel sliding rails and two connecting plates respectively connecting the two ends of the two sliding rails. The bottom surfaces of the two sliding rails and the bottom surface of the annular support plate are located on the same plane. The inner sides of the two sliding rails are provided with limiting grooves extending along the length direction, and are clamped with the limiting rings through the limiting grooves. The inner side surface of one of the sliding rails is provided with a rack meshing with the outer gear ring.

4. The crack detection device for engineering quality inspection according to claim 3 is characterized in that: A supporting bearing is arranged between the connecting ring and the outer sleeve.

5. The crack detection device for engineering quality inspection according to claim 4 is characterized in that: The support ring is provided with a reinforcement ring which is close to the inner wall of the outer sleeve and extends upward, and the reinforcement ring is connected to the outer sides of a plurality of blades.

6. A method for using the crack detection device for engineering quality inspection according to any one of claims 3 to 5, characterized in that: include: Step 1: Clean the surface of the test object; Plan a detection track on the surface of the object to be detected, and remove foreign matter on the surface of the object to be detected along the detection track; Step 2: track laying; On the cleaned surface of the object to be inspected, and then lay the two slide rails along the inspection track; Step 3: Instrument assembly; Insert the detection probe into the inner sleeve so that the lower edge of the detection probe abuts against the retaining ring, and then fix the detection probe in the inner sleeve; Step 4: Instrument installation; First, inject coupling agent from the upper end of the filling pipe to fill the space between the outer sleeve and the inner sleeve, the space between the port at the lower end of the inner sleeve and the detection probe, and the space between the protective sleeve and the outer sleeve. Then, the two slide rails are placed in a matched state, so that the two sides of the limit ring are respectively engaged with the two limit grooves, and the outer gear ring is in a meshing state with the rack, and finally the two slide rails are assembled and connected; Step 5: Hold and push the protective sleeve to slide the detection probe along the extension direction of the track.

7. The method of use according to claim 6, characterized in that: The foreign matter removed includes the weathered layer on the surface of the object being inspected.

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