Horizontal extension contact type disc diameter pile hole detector

Abstract

The invention relates to the technical field of disc diameter pile hole detection, in particular to a horizontal extension contact type disc diameter pile hole detector which comprises a base, a measuring mechanism is arranged on the base and comprises an inner pipe fixed to the base, an outer pipe slides in the vertical direction of the inner pipe, a first spring is arranged at the lower end of the outer pipe, and a second spring is arranged at the lower end of the outer pipe. The device comprises a base and an outer pipe, the outer pipe is rotatably connected with a sealing sleeve through a conveying pipe, second connecting pieces are fixed to the two ends of the outer pipe, measuring arms are rotatably connected to the second connecting pieces, and first connecting pieces are fixed to the two ends of the base. When the device is used for measuring the hole diameter, soil enters the first exhaust pipe through the sealing sleeve, the connecting shaft is purged through the first exhaust pipe, impurities such as soil in the pile hole are prevented from being attached to the connecting shaft when the device is used for measuring, movement of the auxiliary arm and the measuring arm is prevented from being hindered, and therefore the plane size and elevation measurement accuracy during hole diameter measurement are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of disc diameter pile hole detection, in particular to a horizontal extension contact type disc diameter pile hole detector. Background Art

[0002] Pile foundation is a key component for the bearing capacity stability of various buildings and structures. The quality of bored pile is one of the important factors affecting the quality of bored pile body. The quality of bored pile is affected by factors such as groundwater, underlying structure, and bored pile operation, which may cause adverse effects such as hole collapse, diameter shrinkage, pile hole tilt, and excessive sediment. Hole collapse will cause the pile hole diameter to exceed the standard and produce sediment. Diameter shrinkage will cause the pile hole diameter to fail to meet the standard and affect the bearing capacity. Stress concentration is likely to occur after pressure is applied, resulting in broken piles. The diameter size and position of the expanded pile directly affect its bearing performance.

[0003] The existing ultrasonic aperture detector is greatly affected by the mud density. Especially with the development of economic construction, super-large diameter and super-long piles are more and more widely used. The mud density of super-long piles is difficult to reduce, and reducing it can easily cause hole collapse. Although the existing mechanical hole detector is less affected by the mud density, the detection arm draws an arc around its upper end during the detection process. As the detection arm extends, the elevation of its lower end also increases synchronously, which on the one hand causes the detection elevation to deviate, and on the other hand, there will be a blind spot in the detection of the expanded pile cavity, resulting in a large detection error. In addition, during the detection, due to the presence of more impurities in the hole, the device is prone to adhere to mud at the connection of the device during use, thereby affecting the movement of the auxiliary arm and the measuring arm, and further affecting the accuracy of the device for measurement. Summary of the Invention

[0004] The object of the present invention is to provide a horizontal extension contact type disc diameter pile hole detector, which is connected to the inner tube (21) through a cable (29), and the inner tube (21) is hinged to the base (1), so that the elevation is kept consistent, so that the elevation of the cable (29) and the base (1) are kept synchronous, and the length of the measuring arm (26) is twice that of the auxiliary arm (25), and the auxiliary arm (25) is connected to the midpoint of the measuring arm (26). At the same time, the distal end of the measuring arm (26) and the connection between the auxiliary arm (25) and the base (1) are in the same plane, so that the measuring arm (26) maintains horizontal detection during measurement, and the distal end of the detection arm (26) is horizontally displaced during detection; In addition, the gas enters the sealing sleeve through the delivery pipe, enters the first exhaust pipe through the sealing sleeve, and purges the connecting shaft through the first exhaust pipe to prevent impurities such as soil in the pile hole from adhering to the connecting shaft during measurement, thereby hindering the movement of the auxiliary arm and the measuring arm, thereby affecting the accuracy of the device's aperture measurement.

[0005] To achieve the above object, the present invention provides the following technical solution: a horizontal extension contact disc diameter pile hole detector, comprising a base, wherein a measuring mechanism is provided on the base; The measuring mechanism includes an inner tube fixed to a base, an outer tube sliding in a vertical direction on the inner tube, a first spring provided at the lower end of the outer tube, a second connecting member fixed at both ends of the outer tube, a measuring arm rotatably connected to the second connecting member, a first connecting member fixed at both ends of the base, an auxiliary arm rotatably connected to the first connecting member, the auxiliary arm being rotatably connected to the measuring arm, and an inflation mechanism further provided on the inner tube; The length of the measuring arm of the detection mechanism is twice that of the auxiliary arm. The auxiliary arm is connected at the midpoint of the measuring arm. When the device is placed, the distal end of the measuring arm and the connection between the auxiliary arm and the base are in the same plane. In this way, the measuring arm maintains horizontal detection during measurement, and the distal end of the detection arm is horizontally displaced during detection.

[0006] The inflation mechanism includes a protective airbag arranged at the top end of the inner tube, the protective airbag is connected to an external air pipe, the lower end of the protective airbag is connected to a central plate, multiple groups of telescopic rods are arranged on the outer side of the central plate, and a detection mechanism is also provided at the lower end of the central plate; The detection mechanism includes an air storage disk connected to the central disk, two groups of sealing sleeves are connected on both sides of the air storage disk, the bottom of the two groups of sealing sleeves are connected to the first exhaust pipe, extrusion columns are fixed on both sides of the measuring arm, a movable plate is movable on one side of the extrusion column, one end of the movable plate is inserted into the interior of the sealing sleeve, the upper ends of the two groups of sealing sleeves are connected to the exhaust disk, and a sensor is provided on the upper end of the exhaust disk.

[0007] Preferably, one end of the first spring is fixedly connected to the base, a connecting shaft is provided at the midpoint of the measuring arm, the connecting shaft is rotationally connected to the auxiliary arm, and a cable is further provided at the upper end of the inner tube, one end of the cable is connected to a winch.

[0008] Preferably, a first connecting tube is fixed to the lower end of the protective airbag, one end of which is connected to the central disk, a second connecting tube is fixed to the lower end of the central disk, the lower end of the second connecting tube is connected to the air storage disk, the first connecting tube and the second connecting tube are both designed with elastic materials, and pressure valves are provided inside the first connecting tube and the second connecting tube.

[0009] Preferably, a limiting plate is provided at one end of the telescopic rod, and a limiting groove is further provided on the telescopic rod, and the limiting plate slides inside the limiting groove.

[0010] Preferably, a fixing plate is fixed to the lower end of the outer tube, a fixing rod is fixedly provided on the fixing plate, and a protective shell is fixedly provided at one end of the fixing rod.

[0011] Preferably, a connecting rod is further fixed on the fixing plate, one end of the connecting rod is fixedly connected to the sealing sleeve, one end of the extrusion column is in contact with the second spring, and one end of the second spring is connected to the protective shell.

[0012] Preferably, two groups of delivery pipes are provided on both sides of the gas storage disk, and one end of the two groups of delivery pipes is connected to the sealing sleeve.

[0013] Preferably, a fixing sleeve is provided on the first exhaust pipe, one end of the fixing sleeve is fixedly connected to the measuring arm, and one end of the first exhaust pipe is provided on one side of the connecting shaft.

[0014] Preferably, both groups of the delivery pipes are provided with a second exhaust pipe, and the second exhaust pipe is communicated with the measuring arm.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, gas enters the sealing sleeve through the delivery pipe, enters the first exhaust pipe through the sealing sleeve, and purges the connecting shaft through the first exhaust pipe to prevent impurities such as soil in the pile hole from adhering to the connecting shaft during measurement, thereby hindering the movement of the auxiliary arm and the measuring arm, thereby affecting the accuracy of the device in measuring the aperture.

[0016] 2. In the present invention, the multiple groups of telescopic rods on the centering plate are extended, and the movement of the telescopic rods drives the limiting plates to slide inside the limiting grooves, while being restricted inside the telescopic rods, so that the telescopic rods are in contact and extrusion with the inner wall of the pile hole, thereby centering the device in the pile hole, avoiding the device from being misaligned during use, thereby affecting the measurement accuracy of the device and avoiding large errors during the measurement process.

[0017] 3. The present invention fills the outside gas into the interior of the protective airbag through an external air pipe. The internal pressure of the protective airbag increases, causing the interior of the protective airbag to expand, thereby protecting the hole mouth of the pile hole that needs to be tested, and preventing the device from causing damage to the hole mouth when in use, causing impurities such as mud at the hole mouth to fall into the pile hole, causing knocks and collisions on the device, causing damage to the device and affecting the measurement accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the measuring mechanism of the present invention; Figure 3 Schematic diagram of the measuring mechanism of the present invention Figure 2 ; Figure 4 It is a schematic structural diagram of the telescopic rod portion of the present invention; Figure 5 It is a partial structural diagram of the inflation mechanism of the present invention; Figure 6 Figure is a schematic diagram of the detection mechanism part structure of the present application; Figure 7 Figure is the schematic diagram of the detection mechanism part structure of the present application; Figure 6 Figure is the enlarged view of part A in the middle of the present application; Figure 8 Figure is the schematic diagram of the fixed sleeve part structure of the present application; Figure 9 Figure is the schematic diagram of the detection mechanism part structure of the present application; Figure 10 Figure is the coordinate diagram of the calculation formula of the present application.

[0019] In the figure: 1, base; 2, measuring mechanism; 21, inner tube; 22, outer tube; 23, first spring; 24, first connecting piece; 25, auxiliary arm; 26, measuring arm; 27, second connecting piece; 28, connecting shaft; 29, cable; 3, inflation mechanism; 31, external air pipe; 32, protective air bag; 33, centering disc; 34, telescopic rod; 341, limiting plate; 342, limiting groove; 35, first connecting pipe; 36, second connecting pipe; 4, detection mechanism; 41, gas storage disc; 42, delivery pipe; 43, sealing sleeve; 44, first exhaust pipe; 45, second exhaust pipe; 46, exhaust disc; 47, inductor; 48, fixed sleeve; 49, fixed rod; 410, fixed plate; 411, connecting rod; 412, extrusion column; 413, second spring; 414, movable rod; 415, movable plate; 416, protective shell. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application.

[0021] Referring to Figures 1 to 10 the figure, the present application provides a horizontal extension contact type disc diameter pile hole detector, which comprises a base 1, and a measuring mechanism 2 is arranged on the base 1; The measuring mechanism 2 includes an inner tube 21 fixed to the base 1. An outer tube 22 slides vertically on the inner tube 21. A first spring 23 is provided at the lower end of the outer tube 22. Second connecting members 27 are fixed at both ends of the outer tube 22. A measuring arm 26 is rotatably connected to the second connecting member 27. First connecting members 24 are fixed at both ends of the base 1. An auxiliary arm 25 is rotatably connected to the first connecting member 24. The auxiliary arm 25 is rotatably connected to the measuring arm 26. An inflation mechanism 3 is also provided on the inner tube 21. The length of the measuring arm 26 of the detection mechanism is twice that of the auxiliary arm 25. The auxiliary arm 25 is connected to the midpoint of the measuring arm 26. At the same time, when the device is placed, the distal end of the measuring arm 26 and the connection between the auxiliary arm 25 and the base 1 are in the same plane. In this way, the measuring arm 26 maintains horizontal detection during measurement, and the distal end of the detection arm 26 is horizontally displaced during detection.

[0022] The inflation mechanism 3 includes a protective airbag 32 disposed at the top of the inner tube 21. The protective airbag 32 is connected to an external air pipe 31. The lower end of the protective airbag 32 is connected to a central plate 33. Multiple sets of telescopic rods 34 are disposed outside the central plate 33. The lower end of the central plate 33 is also provided with a detection mechanism 4. The detection mechanism 4 includes an air storage disk 41 connected to the central disk 33. Two groups of sealing sleeves 43 are connected on both sides of the air storage disk 41. The bottom of the two groups of sealing sleeves 43 are connected to the first exhaust pipe 44. Extrusion columns 412 are fixed on both sides of the measuring arm 26. A movable plate 415 is movable on one side of the extrusion column 412. One end of the movable plate 415 is inserted into the interior of the sealing sleeve 43. The upper ends of the two groups of sealing sleeves 43 are connected to the exhaust disk 46. A sensor 47 is provided on the upper end of the exhaust disk 46.

[0023] Before using this device, first place the device in the pile hole and slowly lift it up by the winch outside the cable 29. The cable 29 can transmit the angle between the measuring arm 26 and the outer tube 22 or the sliding distance of the outer tube 22 outside the inner tube 21 to the hole mouth, thereby detecting the distance between the far ends of the axially symmetrical outer tubes 22, which is also the hole diameter.

[0024] External gas is filled into the protective airbag 32 through the external air pipe 31. The internal pressure of the protective airbag 32 increases, causing the internal part of the protective airbag 32 to expand, thereby protecting the hole mouth of the pile hole that needs to be tested, and preventing the device from causing damage to the hole mouth during use, causing impurities such as mud at the hole mouth to fall into the pile hole, causing knocks and collisions on the device, causing damage to the device and affecting the measurement accuracy of the device.

[0025] At the same time, when the air pressure in the protective airbag 32 reaches a certain level, it enters the centering plate 33 through the first connecting tube 35, inflating the centering plate 33, causing the multiple groups of telescopic rods 34 on the centering plate 33 to extend. The movement of the telescopic rods 34 drives the limiting plates 341 to slide inside the limiting grooves 342, and at the same time, they are restricted inside the telescopic rods 34, so that the telescopic rods 34 are in contact and squeezed with the inner wall of the pile hole, thereby centering the device in the pile hole, avoiding the device from being misaligned during use, thereby affecting the measurement accuracy of the device and avoiding large errors during the measurement process.

[0026] At the same time, when the air pressure in the centering disk 33 reaches a certain level, it is discharged into the air storage disk 41 through the second connecting pipe 36, enters the sealing sleeve 43 through the delivery pipe 42, and enters the first exhaust pipe 44 through the sealing sleeve 43. The connecting shaft 28 is purged through the first exhaust pipe 44 to prevent impurities such as mud in the pile hole from adhering to the connecting shaft 28 during measurement, thereby hindering the movement of the auxiliary arm 25 and the measuring arm 26, thereby affecting the accuracy of the device in measuring the aperture.

[0027] At the same time, when long-term work causes the connection between the second connecting member 27 and the measuring arm 26 to deviate, the measuring arm 26 squeezes the squeezing columns 412 on both sides, thereby driving the squeezing columns 412 to squeeze the second spring 413. When the offset of the measuring arm 26 exceeds the safe range, the squeezing columns 412 squeeze the movable rod 414 inside the protective shell 416, so that the movable rod 414 drives the movable plate 415 to move, and cuts off the connection between the delivery pipe 42 and the first exhaust pipe 44 inside the sealing sleeve 43, resulting in the gas inside the delivery pipe 42 being unable to be discharged through the first exhaust pipe 44. The gas accumulates inside the squeezing columns 412 and enters the exhaust disk 46 through the second exhaust pipe 45. The gas is discharged from the exhaust disk 46 through the sensor 47. At the same time, when the gas is discharged from the sensor 47, a signal is sent at one end of the cable 29 through an electrical signal, reminding the staff that there is a large error in the connection between the measuring arm 26 and the second connecting member 27, thereby knowing that there is a large error in the measurement data of the device. The staff can take out the device according to whether the signal appears, perform calibration, and then measure again.

[0028] Assume that the hinge point between the auxiliary arm 25 and the base 1 is the coordinate origin O (0, 0), the upper end of the measuring arm 26 is displaced from the initial point A (0, ya1) to point A1 (0, ya1), the hinge point between the auxiliary arm 25 and the measuring arm 26 is displaced from point B (xb, yb) to point B1 (xb1, yb1), and the distal end of the measuring arm 26 is displaced from point C (xc, yc) to point C1 (xc1, yc1). If the measuring arm 26 is required to maintain horizontal detection during measurement, the distal end of the detection arm 26 is required to be displaced horizontally, that is, the requirement is: yc1=yc.

[0029]

[0030]

[0031] From formula ②, we can get:

[0032] Substituting formula ① into the equation, we get:

[0033]

[0034] when hour, .

[0035] because , ,so

[0036] This allows you to:

[0037] To achieve this, the measuring arm 26 must be twice as long as the auxiliary arm 25, and the auxiliary arm 25 must be connected to the midpoint of the measuring arm 26. When the device is positioned, the distal end of the measuring arm 26 and the connection between the auxiliary arm 25 and the base 1 are in the same plane. Multiple sets of measuring arms 26 and auxiliary arms 25 can be installed as needed.

[0038] In an optional embodiment, one end of the first spring 23 is fixedly connected to the base 1, a connecting shaft 28 is provided at the midpoint of the measuring arm 26, the connecting shaft 28 is rotationally connected to the auxiliary arm 25, and a cable 29 is also provided at the upper end of the inner tube 21, and one end of the cable 29 is connected to a winch.

[0039] It should be noted that the two ends of the first spring 23 are respectively connected to the base 1 and the outer tube 22, so that when the device is raised, the outer tube 22 slides on the inner tube 21, thereby measuring the diameter of the pile hole. At the same time, the measuring arm 26 is connected to the auxiliary arm 25 through the connecting shaft 28, and the winch at one end of the cable 29 is used to slowly raise the device during measurement. At the same time, the angle between the measuring arm 26 and the outer tube 22 or the sliding distance of the outer tube 22 outside the inner tube 21 is transmitted to the hole mouth through the cable 29.

[0040] In an optional embodiment, a first connecting tube 35 is fixed to the lower end of the protective airbag 32, one end of the first connecting tube 35 is connected to the central disk 33, a second connecting tube 36 is fixed to the lower end of the central disk 33, the lower end of the second connecting tube 36 is connected to the air storage disk 41, the first connecting tube 35 and the second connecting tube 36 are both designed with elastic materials, and pressure valves are provided inside the first connecting tube 35 and the second connecting tube 36.

[0041] It should be noted that the gas added to the device from the external air pipe 31 enters the protective airbag 32. When the air pressure inside the protective airbag 32 is too high, the gas in the protective airbag 32 enters the central disk 33 through the first connecting tube 35. When the air pressure inside the central disk 33 is too high, the gas enters the gas storage disk 41 through the second connecting tube 36.

[0042] In an optional embodiment, a limiting plate 341 is provided at one end of the telescopic rod 34 , and a limiting groove 342 is further provided on the telescopic rod 34 , and the limiting plate 341 slides inside the limiting groove 342 .

[0043] It should be noted that when the centering plate 33 is inflated, the telescopic rod 34 outside the centering plate 33 is inflated, causing the telescopic rod 34 to extend and retract. The limiting plate 341 at one end of the telescopic rod 34 slides inside the limiting groove 342, causing the telescopic rod 34 to extend and contact the inner wall of the pile hole, thereby centering the device.

[0044] In an optional embodiment, a fixing plate 410 is fixed to the lower end of the outer tube 22 , a fixing rod 49 is fixedly provided on the fixing plate 410 , and a protective shell 416 is fixedly provided at one end of the fixing rod 49 .

[0045] It should be noted that the protective shell 416 is fixed by the fixing rod 49 on the fixing plate 410 to ensure the normal operation of the device.

[0046] In an optional embodiment, a connecting rod 411 is also fixed on the fixing plate 410 , one end of the connecting rod 411 is fixedly connected to the sealing sleeve 43 , one end of the extrusion column 412 contacts the second spring 413 , and one end of the second spring 413 is connected to the protective shell 416 .

[0047] It should be noted that the sealing sleeve 43 is fixed by the connecting rod 411, so that the sealing sleeve 43 seals the connection between the delivery pipe 42 and the first exhaust pipe 44 during operation to prevent gas from leaking to the outside and causing damage to the normal operation of the device. At the same time, one end of the second spring 413 is connected to the inside of the protective shell 416 to ensure that the extrusion column 412 is squeezed.

[0048] In an optional embodiment, two groups of delivery pipes 42 are provided on both sides of the gas storage disk 41 , and one end of the two groups of delivery pipes 42 is connected to the sealing sleeve 43 .

[0049] It should be noted that the gas in the gas storage disk 41 is transported to the sealing sleeve 43 through the two sets of delivery pipes 42 on both sides of the gas storage disk 41, and then enters the first exhaust pipe 44 through the sealing sleeve 43 and is discharged to purge impurities on the connecting shaft 28.

[0050] In an optional embodiment, a fixing sleeve 48 is provided on the first exhaust pipe 44 , one end of the fixing sleeve 48 is fixedly connected to the measuring arm 26 , and one end of the first exhaust pipe 44 is provided on one side of the connecting shaft 28 .

[0051] It should be noted that the first exhaust pipe 44 is fixed to the measuring arm 26 by the fixing sleeve 48 to prevent the first exhaust pipe 44 from detaching during operation, resulting in the gas discharged from the first exhaust pipe 44 being unable to clean the connecting shaft 28, thereby ensuring the normal operation of the device.

[0052] In an optional embodiment, both groups of delivery pipes 42 are provided with a second exhaust pipe 45 , and the second exhaust pipe 45 is communicated with the measuring arm 26 .

[0053] It should be noted that the gas entering the delivery pipe 42, when the connection between the delivery pipe 42 and the first exhaust pipe 44 is cut off, enters the exhaust disk 46 through the second exhaust pipe 45 and is discharged through the sensor 47, thereby alerting the staff.

[0054] Working principle: Before using this device, first place the device in the pile hole, and slowly lift the device by the winch outside the cable 29. The cable 29 can transmit the angle between the measuring arm 26 and the outer tube 22 or the sliding distance of the outer tube 22 outside the inner tube 21 to the hole mouth, thereby detecting the distance between the far ends of the axially symmetrical outer tubes 22, which is also the hole diameter.

[0055] External gas is injected into the protection airbag 32 through the external air pipe 31 , and the internal pressure of the protection airbag 32 increases, causing the protection airbag 32 to expand.

[0056] At the same time, when the air pressure in the protective airbag 32 reaches a certain level, it enters the centering plate 33 through the first connecting pipe 35, inflating the centering plate 33, causing the multiple groups of telescopic rods 34 on the centering plate 33 to extend. The movement of the telescopic rods 34 drives the limiting plates 341 to slide inside the limiting grooves 342, and at the same time, they are restricted inside the telescopic rods 34, so that the telescopic rods 34 come into contact and squeeze with the inner wall of the pile hole.

[0057] At the same time, when the air pressure in the center disk 33 reaches a certain level, it is discharged into the air storage disk 41 through the second connecting pipe 36, enters the sealing sleeve 43 through the delivery pipe 42, and enters the first exhaust pipe 44 through the sealing sleeve 43, and the connecting shaft 28 is purged through the first exhaust pipe 44.

[0058] At the same time, when long-term work causes the connection between the second connecting member 27 and the measuring arm 26 to deviate, the measuring arm 26 squeezes the squeezing columns 412 on both sides, thereby driving the squeezing columns 412 to squeeze the second spring 413. When the offset of the measuring arm 26 exceeds the safe range, the squeezing columns 412 squeeze the movable rod 414 inside the protective shell 416, so that the movable rod 414 drives the movable plate 415 to move, and cuts off the connection between the delivery pipe 42 and the first exhaust pipe 44 inside the sealing sleeve 43, resulting in the gas inside the delivery pipe 42 being unable to be discharged through the first exhaust pipe 44. The gas accumulates inside the squeezing columns 412 and enters the exhaust disk 46 through the second exhaust pipe 45. The gas is discharged from the exhaust disk 46 through the sensor 47. At the same time, when the gas is discharged from the sensor 47, a signal is sent at one end of the cable 29 through an electrical signal, reminding the staff that there is a large error in the connection between the measuring arm 26 and the second connecting member 27, thereby knowing that there is a large error in the measurement data of the device. The staff can take out the device according to whether the signal appears, perform calibration, and then measure again.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal extension contact disc diameter pile hole detector, comprising a base (1), characterized in that: A measuring mechanism (2) is provided on the base (1); The measuring mechanism (2) comprises an inner tube (21) fixed on the base (1), an outer tube (22) sliding in the vertical direction on the inner tube (21), a first spring (23) being provided at the lower end of the outer tube (22), second connecting members (27) being fixed at both ends of the outer tube (22), a measuring arm (26) being rotatably connected to the second connecting member (27), first connecting members (24) being fixed at both ends of the base (1), an auxiliary arm (25) being rotatably connected to the first connecting member (24), the auxiliary arm (25) being rotatably connected to the measuring arm (26), and an inflation mechanism (3) being further provided on the inner tube (21); The length of the measuring arm (26) of the detection mechanism is twice that of the auxiliary arm (25), and the auxiliary arm (25) is connected to the midpoint of the measuring arm (26). At the same time, when the device is placed, the distal end of the measuring arm (26) and the connection between the auxiliary arm (25) and the base (1) are in the same plane, so that the measuring arm (26) maintains horizontal detection during measurement, and the distal end of the detection arm (26) is horizontally displaced during detection.

2. The inflation mechanism (3) includes a protective airbag (32) arranged at the top end of the inner tube (21), the protective airbag (32) is connected to an external air pipe (31), the lower end of the protective airbag (32) is connected to a centering plate (33), a plurality of telescopic rods (34) are arranged outside the centering plate (33), and a detection mechanism (4) is also arranged at the lower end of the centering plate (33); The detection mechanism (4) includes an air storage disk (41) connected to the center disk (33), two sets of sealing sleeves (43) are connected to both sides of the air storage disk (41), and the bottoms of the two sets of sealing sleeves (43) are connected to the first exhaust pipe (44). Extrusion columns (412) are fixed on both sides of the measuring arm (26), and a movable plate (415) is movable on one side of the extrusion column (412). One end of the movable plate (415) is inserted into the interior of the sealing sleeve (43), and the upper ends of the two sets of sealing sleeves (43) are connected to the exhaust disk (46), and the upper end of the exhaust disk (46) is provided with a sensor (47).

3. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: One end of the first spring (23) is fixedly connected to the base (1); a connecting shaft (28) is provided at the midpoint of the measuring arm (26); the connecting shaft (28) is rotatably connected to the auxiliary arm (25); a cable (29) is further provided at the upper end of the inner tube (21); one end of the cable (29) is connected to a winch.

4. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: A first connecting tube (35) is fixed to the lower end of the protective airbag (32), one end of the first connecting tube (35) is connected to the centering plate (33), a second connecting tube (36) is fixed to the lower end of the centering plate (33), the lower end of the second connecting tube (36) is connected to the air storage plate (41), the first connecting tube (35) and the second connecting tube (36) are both designed with elastic materials, and pressure valves are provided inside the first connecting tube (35) and the second connecting tube (36).

5. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: A limiting plate (341) is provided at one end of the telescopic rod (34), and a limiting groove (342) is also provided on the telescopic rod (34), and the limiting plate (341) slides inside the limiting groove (342).

6. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: A fixing plate (410) is fixed to the lower end of the outer tube (22), a fixing rod (49) is fixedly provided on the fixing plate (410), and a protective shell (416) is fixedly provided at one end of the fixing rod (49).

7. The horizontal extension contact type disc diameter pile hole detector according to claim 5, characterized in that: A connecting rod (411) is also fixed to the fixing plate (410), one end of the connecting rod (411) is fixedly connected to the sealing sleeve (43), one end of the extrusion column (412) is in contact with the second spring (413), and one end of the second spring (413) is connected to the protective shell (416).

8. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: Two groups of delivery pipes (42) are provided on both sides of the gas storage plate (41), and one end of the two groups of delivery pipes (42) is connected to a sealing sleeve (43).

9. The horizontal extension contact type disc diameter pile hole detector according to claim 1, characterized in that: A fixing sleeve (48) is provided on the first exhaust pipe (44), one end of the fixing sleeve (48) is fixedly connected to the measuring arm (26), and one end of the first exhaust pipe (44) is provided on one side of the connecting shaft (28).

10. The horizontal extension contact type disc diameter pile hole detector according to claim 7, characterized in that: The two groups of delivery pipes (42) are both provided with a second exhaust pipe (45), and the second exhaust pipe (45) is communicated with the measuring arm (26).

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