CN113074606A - Building engineering crack detection device and using method thereof - Google Patents
Building engineering crack detection device and using method thereof Download PDFInfo
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- CN113074606A CN113074606A CN202110169057.4A CN202110169057A CN113074606A CN 113074606 A CN113074606 A CN 113074606A CN 202110169057 A CN202110169057 A CN 202110169057A CN 113074606 A CN113074606 A CN 113074606A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
- G01B5/061—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness height gauges
Abstract
The invention discloses a crack detection device for building engineering, which comprises a device main body, wherein a rotating shaft is rotatably arranged in the device main body, the rotating shaft penetrates through the outer sides of two ends of the device main body and is sleeved with a positioning sleeve, the positioning sleeve is fixedly connected with the device main body, the outer side of one end of the rotating shaft, which penetrates through the device main body, is fixedly connected with a connecting rod, one end of the connecting rod, which is far away from the rotating shaft, is connected with a handle, a gear is sleeved on the outer side of the rotating shaft, which is positioned in the device main body, a dust cover is fixedly arranged at the top of the device main body, a connecting pipe is inserted at the axis of the device main body and the dust cover in a sliding manner, a thread is arranged on the outer side of the connecting pipe, the device utilizes a water belt which is injected with water and, the height is then seen from the scale on the test head and the volume of the fill is calculated.
Description
Technical Field
The invention relates to the technical field of crack detection, in particular to a crack detection device for constructional engineering.
Background
With the continuous development and progress of modern building engineering technology, the requirement on building quality is higher and higher, and particularly, harmful cracks on the building engineering need to be reduced, so that the durability and the applicability of the whole structure are prevented from being influenced.
The conventional detection device cannot detect the depth and the internal length and width of a crack, so that the size of the crack cannot be accurately estimated, and therefore, when the crack is filled, the size of a filler cannot be accurately controlled.
Disclosure of Invention
The invention aims to provide a building engineering crack detection device which utilizes a water belt to be annularly diffused outwards after being injected with water, the diameter of the water belt is the width of a gap, the water belt is extended towards the side surface of the gap under the control of an electromagnetic buckle so as to measure the length of the gap, then the height is seen according to scales on a detection head, and the volume of a filler is obtained through calculation, so that the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a crack detection device for building engineering comprises a device main body, wherein a rotating shaft is rotatably installed in the device main body, positioning sleeves are sleeved on the outer sides of two ends, penetrating out of the device main body, of the rotating shaft, the positioning sleeves are fixedly connected with the device main body, a connecting rod is fixedly connected to the outer side of one end, penetrating out of the device main body, of the rotating shaft, and a handle is connected to one end, far away from the rotating shaft, of the connecting rod;
the gear is sleeved on the outer side of the rotating shaft, which is positioned in the device main body, the dust cover is fixedly mounted at the top of the device main body, the connecting pipe is inserted at the axis of the device main body and the dust cover in a sliding manner, the outer side of the connecting pipe is provided with threads, the connecting pipe is meshed and connected with the gear through the threads, and the outer side of the top of the connecting pipe is symmetrically and fixedly provided with clamping blocks;
the bottom of the connecting pipe is connected with a detection head, a circular groove is formed in the connecting pipe, a piston rod is connected in the connecting pipe in a sliding mode through the circular groove, a piston handle is fixedly connected to the top end of the piston rod, the bottom of the piston rod penetrates through the connecting pipe to be in sliding insertion with the detection head, a scale pipe is arranged at the top of the detection head, a piston is placed in the scale pipe in a sliding mode, the bottom of the piston rod is fixedly connected with the piston, a liquid cavity is formed in the scale pipe, a water adding hole is formed in the outer side of the top of the scale pipe, and a water adding;
a water injection pipeline is arranged in the detection head below the liquid cavity, the bottom of the water injection pipeline is provided with a water injection pipeline port, the outer side of the detection head is wound with a water hose, the top end and the tail end of the water hose are provided with a water hose port and a water hose tail end, the water hose is communicated with the water injection pipeline port through the water hose port, the outer side of the detection head is fixedly connected with a disc spring, and the inner ring of the water hose is fixedly connected with the outer ring of the disc spring and is mutually integrated;
the water hose opening and the top end of the disc spring are fixedly connected with an electromagnetic buckle, the inner side of the electromagnetic buckle is in sliding connection with the water hose and the disc spring which are opposite to the inner ring, the other end of the electromagnetic buckle is symmetrically provided with an electromagnet, an iron sheet is inserted into the electromagnet in a sliding mode, and a clamping sleeve is installed at one end, penetrating out of the electromagnetic buckle, of the iron sheet.
Preferably, the bottom of the detection head is of a conical design.
Preferably, the water belt and the disc spring are respectively unfolded and fixed together, and then the water belt and the disc spring are made into a scroll shape and connected to the lower part of the detection head.
Preferably, the electromagnetic buckle is internally provided with a sliding groove, and the electromagnetic buckle is in sliding connection with the iron sheet through the sliding groove.
Preferably, the graduated tube is transparent glass, and the outside of the graduated tube is marked with a graduated strip.
Preferably, a sealing ring is arranged at the joint of the water injection pipeline port and the water hose port.
A method of using a crack detection device, comprising the steps of:
the first step is as follows: when the device is used for measuring the cracks of the building engineering, the handle is rotated, and the handle is connected with the connecting rod, so that the handle performs circular motion by taking the axis of the rotating shaft as the center of a circle and the length of the connecting rod as the radius, and the rotating shaft performs rotating work because the connecting rod is fixedly connected with the rotating shaft;
the second step is that: the gear sleeved outside the rotating shaft is in meshed connection with the thread arranged outside the connecting pipe, so that when the rotating shaft rotates, the gear is in meshed connection with the thread arranged outside the connecting pipe to drive the connecting pipe to move downwards, the detection head enters the crack, the handle is continuously rotated, the connecting pipe drives the detection head to extend to the deep part of the crack, and when the detection head reaches the lowest part, the handle is stopped rotating;
the third step: when the detection head reaches the bottom of the crack, the piston handle is pressed to make the piston rod slide downwards along the chute in the connecting pipe, so that the piston connected with the bottom end of the piston rod is extruded downwards along the liquid cavity in the graduated tube, water in the liquid cavity enters the water hose through the water injection pipeline, the water hose gradually expands, because the water hose port of the water hose is connected with the water injection pipeline port on the water injection pipeline and one end of the disc spring is also fixedly connected with the outer wall of the detection head beside the water injection pipeline port, the water hose and the disc spring can annularly and outwards diffuse around the detection head and continuously press the piston handle, when the water band abuts against the inner wall of the gap, the expanded diameter of the water band is the width of the gap, and the water quantity entering the water band can be known by watching the scales on the graduated tube, when the device is taken out and water with the same volume is injected, the width of the gap can be obtained by looking at the lower belt with the diameter presented by the water pipe;
the fourth step: when the hosepipe supported the inner wall in gap, control the electromagnetism buckle, switch on for the electro-magnet to can make the outward movement of iron sheet, electromagnetism buckle opens completely this moment, and the outer lane and the inner circle of hosepipe will not slide spacingly in the inside of electromagnetism buckle again this moment, continue to press the piston handle this moment, continue the water injection, and the hosepipe will no longer be the annular diffusion but stretch by the straight line, stretches out to the extending direction in gap, thereby can calculate the length in gap through how much of water injection amount.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the rotating shaft drives the connecting pipe to move downwards by rotating the handle, so that the depth of the device can be measured by inserting the device into the gap, and the piston handle is pressed in a matching manner, so that the piston rod slides downwards along the inside of the connecting pipe, the piston is pushed to downwards extrude water in the liquid cavity, and the water in the liquid cavity flows into the water hose through the water injection pipeline, so that the water hose expands. When needing to measure length, switch on for the electro-magnet through control electromagnetism buckle, thereby make the iron sheet to the both sides motion, thereby continue to carry out the injected water to the hosepipe, hosepipe and dish spring are under the blockking that does not have the iron sheet this moment, can be the straight line and stretch out the motion, thereby measure the length in gap, the device has utilized the characteristic of water, it injects water to last to the hosepipe, thereby can be specific the length width height that reachs the gap, thereby make that maintenance personal is better maintain the gap, thereby reduce extravagant raw materials, thereby realize energy-concerving and environment-protective effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic cross-sectional view of a test head according to the present invention;
FIG. 4 is a schematic structural view of the hose of the present invention in a top view;
FIG. 5 is a schematic view of the disc spring structure of the present invention;
FIG. 6 is a schematic view of the connection structure of the hose, the disc spring and the electromagnetic buckle of the present invention;
FIG. 7 is a schematic cross-sectional view of the hose, the disc spring and the electromagnetic buckle according to the present invention;
FIG. 8 is a structural view of a water hose in the gap length detection of the present invention.
In the figure: 1. a device main body; 2. a handle; 3. a connecting rod; 4. a rotating shaft; 5. a positioning sleeve; 6. a dust cover; 7. a connecting pipe; 8. a piston rod; 9. a piston handle; 10. a clamping block; 11. a detection head; 12. a gear; 13. a piston; 14. a water adding hole cover; 15. a liquid chamber; 16. a graduated tube; 17. a water injection pipeline; 18. a water hose; 19. a water filling hole; 20. a water injection pipe port; 21. carrying out water piping; 22. the end of the water hose; 23. a disc spring; 24. an electromagnetic buckle; 25. an electromagnet; 26. iron sheets; 27. and (4) a ferrule.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, the crack detection device for the construction engineering in the drawing includes a device body 1, a rotating shaft 4 is rotatably installed inside the device body 1, positioning sleeves 5 are sleeved outside the two ends of the rotating shaft 4 penetrating through the device body 1, the positioning sleeves 5 are fixedly connected with the device body 1, a connecting rod 3 is fixedly connected outside one end of the rotating shaft 4 penetrating through the device body 1, and a handle 2 is connected to one end of the connecting rod 3 far away from the rotating shaft 4;
a gear 12 is sleeved on the outer side of the rotating shaft 4 positioned in the device main body 1, a dust cover 6 is fixedly mounted at the top of the device main body 1, a connecting pipe 7 is inserted at the axis of the device main body 1 and the dust cover 6 in a sliding manner, a thread is formed on the outer side of the connecting pipe 7, the connecting pipe 7 is meshed and connected with the gear 12 through the thread, and fixture blocks 10 are symmetrically and fixedly mounted on the outer side of the top of the connecting pipe 7;
the bottom of the connecting pipe 7 is connected with a detection head 11, a circular groove is formed in the connecting pipe 7, a piston rod 8 is connected to the inside of the connecting pipe 7 in a sliding mode through the circular groove, a piston handle 9 is fixedly connected to the top end of the piston rod 8, the bottom of the piston rod 8 penetrates through the connecting pipe 7 to be connected with the detection head 11 in a sliding mode, a scale pipe 16 is arranged at the top of the detection head 11, a piston 13 is placed in the scale pipe 16 in a sliding mode, the bottom of the piston rod 8 is fixedly connected with the piston 13, a liquid cavity 15 is formed in the scale pipe 16, a water adding hole 19 is formed in the outer side of the top of the scale pipe 16, and the;
a water injection pipeline 17 is arranged in the detection head 11 and below the liquid cavity 15, a water injection pipeline port 20 is arranged at the bottom of the water injection pipeline 17, a water hose 18 is wound on the outer side of the detection head 11, a water hose port 21 and a water hose terminal 22 are arranged at the top end and the terminal end of the water hose 18, the water hose 18 is communicated with the water injection pipeline port 20 through the water hose port 21, a disc spring 23 is fixedly connected to the outer side of the detection head 11, and the inner ring of the water hose 18 is fixedly connected with the outer ring of the disc spring 23 and is integrated with the outer ring of the disc spring 23;
the water hose opening 21 and the top end of the disc spring 23 are fixedly connected with an electromagnetic buckle 24, the inner side of the electromagnetic buckle 24 is in sliding connection with the water hose 18 and the disc spring 23 which are opposite to the inner ring, one end of the electromagnetic buckle 24 is fixedly connected with the disc spring 23, the other end of the electromagnetic buckle 24 is symmetrically provided with an electromagnet 25, an iron sheet 26 is inserted into the electromagnet 25 in a sliding mode, and a clamping sleeve 27 is arranged at one end, penetrating out of the electromagnetic buckle 24, of the iron sheet 26.
Referring to fig. 1 and 3, the bottom of the detection head 11 is designed to be tapered, so as to be easily inserted into the gap.
Referring to fig. 1, 4, 5 and 6, the hose 18 and the disc spring 23 are respectively unfolded and fixed together, and then the hose 18 and the disc spring 23 are formed into a scroll shape and connected to the lower portion of the detection head 11.
Referring to fig. 7, a sliding slot is formed inside the electromagnetic buckle 24, and the electromagnetic buckle 24 is slidably connected to the iron sheet 26 through the sliding slot.
Referring to fig. 3, the graduated tube 16 is transparent and has graduated strips on its outside.
And a sealing ring is arranged at the joint of the water injection pipeline port 20 and the water hose port 21.
A method for using a crack detection device for construction engineering according to any one of claims 1 to 5, comprising the following steps:
the first step is as follows: when the crack of the building engineering is measured, the device is used, the handle 2 is rotated, the handle 2 is connected with the connecting rod 3, so that the handle 2 performs circular motion by taking the axis of the rotating shaft 4 as the center of a circle and the length of the connecting rod 3 as the radius, and the connecting rod 3 is fixedly connected with the rotating shaft 4, so that the rotating shaft 4 performs rotating work;
the second step is that: because the gear 12 sleeved outside the rotating shaft 4 is in meshed connection with the thread arranged outside the connecting pipe 7, when the rotating shaft 4 rotates, the gear 12 is in meshed connection with the thread arranged outside the connecting pipe 7 to drive the connecting pipe 7 to move downwards, so that the detection head 11 enters the crack, the handle 2 is continuously rotated, the connecting pipe 7 drives the detection head 11 to extend to the deep part of the crack, and when the detection head 11 reaches the lowest part, the handle 2 is stopped rotating;
the third step: when the detection head 11 reaches the bottom of the crack, the piston handle 9 is pressed, the piston rod 8 slides downwards along the sliding groove in the connecting pipe 7, so that the piston 13 connected with the bottom end of the piston rod 8 extrudes downwards along the liquid cavity 15 in the graduated tube 16, water in the liquid cavity 15 enters the water hose 18 through the water injection pipeline 17, the water hose 18 expands gradually, the water hose port 21 of the water hose 18 is connected with the water injection pipeline port 20 on the water injection pipeline 17, and one end of the disc spring 23 is fixedly connected with the outer wall of the detection head 11 beside the water injection pipeline port 20, so that the water hose 18 and the disc spring 23 annularly and outwards diffuse around the detection head 11, the piston handle 9 is continuously pressed, when the water hose 18 abuts against the inner wall of the crack, at the moment, the expanded diameter of the water hose 18 is the width of the crack, at the moment, the water amount entering the water hose 18 is known by watching the scale on the graduated tube, when the device is taken out and water with the same volume is injected, the width of the gap can be obtained by looking at the diameter of the lower belt of the water pipe 18;
the fourth step: when the water hose 18 butts against the inner wall of the gap, the electromagnetic buckle 24 is controlled, the electromagnet 25 is electrified, so that the iron sheet 26 moves outwards, the electromagnetic buckle 24 is completely opened at the moment, the outer ring and the inner ring of the water hose 18 do not slide in the electromagnetic buckle 24 any more for limiting, the piston handle 9 is continuously pressed at the moment, water injection is continued, the water hose 18 does not diffuse annularly any more but stretches linearly, the water hose stretches out in the extending direction of the gap, and the length of the gap can be calculated through the amount of injected water.
Under the condition of measuring the width of the gap, water is injected into the water hose 18, and the water hose 18 is restricted by the disc spring 23 and limited by the electromagnetic buckle 24, so that the water hose 18 can only expand in a disc shape. When the length of the gap is measured, the water belt 18 is restrained by the disc spring 23, the water belt 18 and the disc spring 23 are in a spiral shape, the water belt 18 is under the action of expansion force of water, the water belt 18 and the disc spring 23 at the position of the water belt opening 21 are firstly unfolded and straightened, the water quantity injected into the water belt 18 is increased, the water belt 18 is expanded to overcome the restraint of the disc spring 23 on the water belt 18, the straightened length of the water belt 18 is increased, when the spiral-shaped part of the water belt 18 and the disc spring 23 abuts against the limiting position of the length direction of the gap, the thrust of water injection into the water belt 18 needs to be increased to overcome the acting force of the side wall of the width direction of the gap on the water belt 18, and the straightened length of the water belt 18 is.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a building engineering crack detection device, includes device main part (1), its characterized in that: a rotating shaft (4) is rotatably installed in the device main body (1), positioning sleeves (5) are sleeved on the outer sides of the two ends, penetrating out of the device main body (1), of the rotating shaft (4), the positioning sleeves (5) are fixedly connected with the device main body (1), a connecting rod (3) is fixedly connected to the outer side of one end, penetrating out of the device main body (1), of the rotating shaft (4), and a handle (2) is connected to one end, far away from the rotating shaft (4), of the connecting rod (3);
the gear (12) is sleeved on the outer side, located inside the device main body (1), of the rotating shaft (4), the dust cover (6) is fixedly installed on the top of the device main body (1), the connecting pipe (7) is inserted and connected in a sliding mode at the axis of the device main body (1) and the axis of the dust cover (6), threads are formed in the outer side of the connecting pipe (7), the connecting pipe (7) is connected with the gear (12) in a meshed mode through the threads, and the clamping blocks (10) are symmetrically and fixedly installed on the outer side of the top of the connecting pipe (7;
the bottom of the connecting pipe (7) is connected with a detection head (11), a circular groove is formed in the connecting pipe (7), a piston rod (8) is connected to the inside of the connecting pipe (7) in a sliding mode through the circular groove, the top end of the piston rod (8) is fixedly connected with a piston handle (9), the bottom of the piston rod (8) penetrates through the connecting pipe (7) to be connected with the detection head (11) in a sliding mode, a scale pipe (16) is arranged at the top of the detection head (11), a piston (13) is placed in the scale pipe (16) in a sliding mode, the bottom of the piston rod (8) is fixedly connected with the piston (13), a liquid cavity (15) is formed in the scale pipe (16), a water adding hole (19) is formed in the outer side of the top of the scale pipe (16), and the water adding hole;
a water injection pipeline (17) is arranged below the liquid cavity (15) in the detection head (11), the bottom of the water injection pipeline (17) is provided with a water injection pipeline port (20), the outer side of the detection head (11) is wound with a water hose (18), the top end and the tail end of the water hose (18) are provided with a water hose port (21) and a water hose tail end (22), the water hose (18) is communicated with the water injection pipeline port (20) through the water hose port (21), the outer side of the detection head (11) is fixedly connected with a disc spring (23), the water hose (18) and the disc spring (23) are attached and fixedly connected into a whole, and the water hose (18) and the disc spring (23) are wound into a scroll shape;
the water hose opening (21) and the disc spring (23) are fixedly connected with an electromagnetic buckle (24), the inner side of the electromagnetic buckle (24) is connected with the water hose (18) and the disc spring (23) in a sliding mode, the inner side of the electromagnetic buckle (24) is opposite to the inner ring, the other end of the electromagnetic buckle (24) is symmetrically provided with an electromagnet (25), an iron sheet (26) is inserted in the electromagnet (25) in a sliding mode, and a clamping sleeve (27) is installed at one end, penetrating out of the electromagnetic buckle (24), of the iron sheet (26).
2. The construction engineering crack detection device of claim 1, wherein: the bottom of the detection head (11) is designed to be conical.
3. The construction engineering crack detection device of claim 1, wherein: the water hose (18) and the disc spring (23) are respectively unfolded and then fixed together, and then the water hose (18) and the disc spring (23) are made into a scroll shape and connected to the lower part of the detection head (11).
4. The construction engineering crack detection device of claim 1, wherein: a sliding groove is formed in the electromagnetic buckle (24), and the electromagnetic buckle (24) is connected with the iron sheet (26) in a sliding mode through the sliding groove.
5. The construction engineering crack detection device of claim 1, wherein: the graduated tube (16) is transparent glass and is externally provided with a graduated strip.
6. The construction engineering crack detection device of claim 1, wherein: and a sealing ring is arranged at the joint of the water injection pipeline port (20) and the water hose port (21).
7. A method for using a crack detection device for construction engineering according to any one of claims 1 to 5, comprising the following steps:
the first step is as follows: when the crack of the building engineering is measured, the device is used, the handle (2) is rotated, the handle (2) is connected with the connecting rod (3), so that the handle (2) performs circular motion by taking the axis of the rotating shaft (4) as the center of a circle and the length of the connecting rod (3) as the radius, and the rotating shaft (4) performs rotating work because the connecting rod (3) is fixedly connected with the rotating shaft (4);
the second step is that: because the gear (12) sleeved outside the rotating shaft (4) is in meshed connection with the thread arranged outside the connecting pipe (7), when the rotating shaft (4) rotates, the gear (12) is in meshed connection with the thread arranged outside the connecting pipe (7) to drive the connecting pipe (7) to move downwards, so that the detection head (11) enters the crack, the handle (2) continues to rotate, the connecting pipe (7) drives the detection head (11) to extend to the deep part of the crack, and when the detection head (11) reaches the lowest part, the handle (2) stops rotating;
the third step: when the detection head (11) reaches the bottom of the crack, the piston handle (9) is pressed, the piston rod (8) slides downwards along the sliding groove in the connecting pipe (7), so that the piston (13) connected with the bottom end of the piston rod (8) extrudes downwards along the liquid cavity (15) in the graduated tube (16), water in the liquid cavity (15) enters the water hose (18) through the water injection pipeline (17), the water hose (18) can expand gradually, the water hose opening (21) of the water hose (18) is connected with the water injection pipeline opening (20) in the water injection pipeline (17), one end of the disc spring (23) is fixedly connected with the outer wall of the detection head (11) beside the water injection pipeline opening (20), and therefore the water hose (18) and the disc spring (23) can diffuse outwards in an annular manner around the detection head (11), the piston handle (9) is continuously pressed, and when the inner wall of the water hose (18) abuts against the gap, at the moment, the expanded diameter of the water band (18) is the width of the crack, at the moment, the water quantity entering the water band (18) can be known by looking at the scales on the graduated tube (16), and when the device is taken out and water with the same volume is injected, the width of the crack can be obtained by looking at the diameter of the water tube (18);
the fourth step: when hosepipe (18) supported the inner wall in gap, control electromagnetism buckle (24), energize for electro-magnet (25), thereby can make iron sheet (26) outwards move, electromagnetism buckle (24) are opened completely this moment, the outer lane and the inner circle of hosepipe (18) will not slide spacing in the inside of electromagnetism buckle (24) again this moment, continue to press piston handle (9) this moment, continue the water injection, hosepipe (18) will not be the annular diffusion again but be the straight line and stretch, stretch out to the extending direction in gap, thereby can calculate the length in gap through how much of water injection amount.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116379879A (en) * | 2023-06-07 | 2023-07-04 | 机械工业勘察设计研究院有限公司 | Crack detection device for ancient building and application method of crack detection device |
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