Self-guiding drop hammer combined structure for foundation pile high strain detection

Abstract

The utility model relates to the technical field of foundation pile detection auxiliary equipment, in particular to a self-guiding drop hammer combined structure for foundation pile high strain detection, which comprises a detection structure main body, a hammer body is mounted at the top end of the detection structure main body, and a connecting plate is fixedly connected to the top end of the hammer body. Connecting mechanisms are fixedly connected to the two sides of the top end of the detection structure body, each connecting mechanism comprises supporting columns, the supporting columns are located on the two sides of a connecting plate and fixedly connected to the top end of the detection structure body, limiting plates are fixedly connected to the top ends of the supporting columns, and connecting columns are slidably connected to the top ends of the limiting plates; the two sides of the top end of the connecting plate are slidably connected with reset mechanisms, and the reset mechanisms penetrate into the connecting plate. According to the utility model, internal parts of the connecting mechanism are matched with each other, so that the connecting plate can drive the hammer body to hoist conveniently, and the hammer body and the concentric shaft of the detection structure main body are in a coaxial state conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection auxiliary equipment, in particular to a self-guided drop hammer combination structure for pile foundation high strain detection. Background Art

[0002] The existing high-strain detection of pile foundations generally adopts the free-fall method of lifting a heavy hammer for detection. When the heavy hammer falls freely, it will hit the pile head of the building foundation pile. The potential energy of the heavy hammer is converted into mechanical energy, and the signal is collected by the sensor to analyze the integrity and bearing capacity of the foundation pile. The existing technology generally installs the sensor for collecting signals on the pile body. The drop hammer is generally lifted by a crane or an excavator. The alignment of the drop hammer and the foundation pile takes a long time, and the detection efficiency is low. Some pile heads are easily broken under the impact of the free drop hammer, and the pile heads need to be reinforced. The existing technology of the pile foundation high-strain detection drop hammer structure is relatively simple, and often requires manual intervention positioning, which is time-consuming and labor-intensive. In addition, the coaxiality of the drop hammer and the foundation pile to be tested is difficult to ensure, and there are problems such as offset and misalignment.

[0003] After searching, a utility model patent with the publication number CN207260203U specifically discloses a self-guided drop hammer combination structure for high-strain detection of pile foundations, which belongs to the technical field of auxiliary equipment for high-strain detection of pile foundations, including a cap body, a cap top, and a rib plate. The top of the cap top is provided with a linear guide column, and the lower end of the linear guide column is fixed to the top of the cap top in a manner perpendicular to the cap top. The side edge of the cap top is provided with a collar, and the collar is provided with a positioning pin hole. A hammer body is provided above the cap top, and a hammer pin hole matching the positioning pin hole is provided on the outer wall of the lower end of the hammer body, and a guide hole is provided at the geometric center position of the bottom of the hammer body. The pile cap and the hammer body of the utility model are integrated, and detection and disassembly can be completed by one hoisting, which is highly efficient. It solves the technical problems that when the heavy hammer hits the pile head of the building foundation pile during free fall, the coaxiality of the drop hammer and the pile to be tested is difficult to ensure, and some pile heads are easily broken under the impact force of the free falling hammer.

[0004] In the above patent, the coaxiality of the falling hammer and the pile to be measured is achieved only by providing a linear guide column on the top of the cap and a guide hole at the geometric center of the bottom of the hammer body. However, when the hammer body is lifted by a crane or an excavator through a connecting structure, there will be a certain amount of shaking, resulting in the linear guide column and the guide hole at the geometric center of the bottom of the hammer body not being on the same central axis. As a result, when the hammer body falls, the linear guide column and the hammer body will collide with each other, causing the linear guide column and the hammer body to break, thereby causing a safety hazard.

[0005] Therefore, it is necessary to propose a self-guided drop hammer combined structure for high-strain detection of pile foundations to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a self-guided drop hammer combination structure for high-strain detection of foundation piles. Through the mutual cooperation between the internal parts of the connecting mechanism, it is convenient for the connecting plate to drive the hammer to be lifted, and it is convenient for the hammer to be in a coaxial state with the concentric axes of the detection structure main body, so as to solve the problem in the prior art that the hammer is lifted by a crane or an excavator through the connecting structure, and there will be a certain shaking, resulting in the linear guide column and the guide hole of the bottom geometric center of the hammer body not being on the same central axis, thereby posing certain safety hazards.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-guided drop hammer combination structure for pile foundation high strain detection, comprising a detection structure main body, a hammer body is installed at the top of the detection structure main body, a connecting plate is connected and fixed to the top of the hammer body, connecting mechanisms are connected and fixed to both sides of the top of the detection structure main body and penetrate into the interior of the connecting plate, and reset mechanisms are slidably connected to both sides of the top of the connecting plate and penetrate into the interior of the connecting plate;

[0008] The connecting mechanism includes a supporting column, the supporting columns are located on both sides of the connecting plate and are connected and fixed to the top of the detection structure body, the top of the supporting column is connected and fixed to the limiting plate, the top of the limiting plate is slidably connected with a connecting column, and passes through the limiting plate to the inside of the connecting plate, the top of the detection structure body is installed with limiting columns located on both sides of the connecting plate, and are located between the supporting columns, and pass through the connecting plate to the bottom end of the limiting plate, the connecting column passes through the inside of the connecting plate and is slidably connected with fixed columns on both sides, and passes through the connecting column to the inside of the connecting plate, and the side of the fixing column away from the connecting plate is connected and fixed with a contraction spring, and is located inside the connecting column;

[0009] The reset mechanism includes a telescopic column, which is slidably connected to the top end of the connecting plate and is located on both sides of the connecting column, one side of the telescopic column is connected and fixed with a telescopic spring and is located inside the connecting plate, the inside of the connecting plate is slidably connected with a sliding plate and is located at the bottom end of the telescopic column and on one side of the connecting column, the top of the sliding plate away from the connecting column is connected and fixed with a reset spring, the side of the reset spring away from the sliding plate is connected and fixed to a limiting block and is located inside the connecting plate, a buffer plate is installed at the bottom end of the connecting plate and is sleeved with the outer wall of the limiting column, and the bottom end of the buffer plate is connected and fixed with a shock-absorbing spring and is sleeved with the outer wall of the limiting column.

[0010] Preferably, a fixing groove matching with the fixing column is provided inside the connecting plate, a movable groove matching with the fixing column is provided inside the connecting column, and limiting grooves matching with the connecting plate are provided between the supporting columns.

[0011] Preferably, a sliding groove matching the telescopic column is provided inside the connecting plate, and a telescopic groove matching the sliding plate is provided inside the connecting plate.

[0012] Preferably, a side of the sliding plate close to the connecting column is provided with an arc surface matching the outer wall of the connecting column, and a top end of the sliding plate is provided with a conical groove matching the telescopic column.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. By making the connection column and the connection plate contact each other, the connection plate squeezes the fixed column, the fixed column squeezes the contraction spring to shrink and move, the fixed column moves to the inside of the connection column, so that the connection column can move to the inside of the connection plate, and at the same time, the connection plate releases the squeezing of the fixed column, so that the contraction spring resets and pushes the fixed column to move to the inside of the connection plate, completing the connection and fixation between the connection column and the connection plate, and then the crane drives the connection plate to move through the connection column, so that the movement of the connection plate drives the movement of the hammer, and the connection plate moves on the support column through the limit column, so that the connection plate is limited and moved, so that the movement of the connection plate will not drive the hammer to shake due to shaking, so that the hammer and the main body of the detection structure are always in a concentric axis state;

[0015] 2. The connecting plate moves and contacts with the limit plate, so that the limit plate squeezes the telescopic column on the top of the connecting plate, and the telescopic column squeezes the telescopic spring to contract and move, so that the telescopic column moves to push the sliding plate to squeeze the reset spring on one side of the limit block, so that the sliding plate squeezes the reset spring to contract and move, and the sliding plate moves to push the fixed column to squeeze the contraction spring from the connecting plate to the inside of the connecting column, and the connection between the connecting column and the connecting plate is released, so that the hammer falls under its own gravity, and the connecting plate slides on the limit column and knocks on the main body of the detection structure to complete the data detection of the foundation pile to be tested. At the same time, the connecting plate will contact the buffer plate, so that the buffer plate squeezes the shock-absorbing spring to contract and move, so as to absorb the kinetic energy of the hammer's descent and reduce the damage of the kinetic energy of the hammer to the main body of the detection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the connecting column of the utility model;

[0019] Figure 3It is a schematic diagram of the cross-sectional structure of the connecting plate of the utility model;

[0020] Figure 4 For the utility model Figure 3 Enlarged structural diagram at A in the middle.

[0021] Description of reference numerals:

[0022] 1. Detection structure body; 101. Hammer; 102. Connecting plate; 2. Connecting mechanism; 201. Support column; 202. Limiting plate; 203. Connecting column; 204. Fixed column; 205. Contraction spring; 206. Limiting column; 3. Resetting mechanism; 301. Telescopic column; 302. Telescopic spring; 303. Sliding plate; 304. Limiting block; 305. Resetting spring; 306. Shock-absorbing spring; 307. Buffer plate. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The utility model provides Figure 1-4 A self-guided drop hammer assembly structure for pile foundation high strain detection shown in the figure comprises a detection structure main body 1, a hammer body 101 is installed at the top of the detection structure main body 1, a connecting plate 102 is connected and fixed to the top of the hammer body 101, connecting mechanisms 2 are connected and fixed to both sides of the top of the detection structure main body 1 and penetrate into the interior of the connecting plate 102, and reset mechanisms 3 are slidably connected to both sides of the top of the connecting plate 102 and penetrate into the interior of the connecting plate 102;

[0025] The connecting mechanism 2 includes a supporting column 201, which is located on both sides of the connecting plate 102 and is connected and fixed to the top of the detection structure body 1. The top of the supporting column 201 is connected and fixed to the limiting plate 202. The top of the limiting plate 202 is slidably connected with a connecting column 203, and passes through the limiting plate 202 to the inside of the connecting plate 102. The top of the detection structure body 1 is equipped with limiting columns 206 located on both sides of the connecting plate 102, and is located between the supporting columns 201, and passes through the connecting plate 102 to the bottom of the limiting plate 202. The connecting column 203 passes through the inside of the connecting plate 102 and is slidably connected with a fixing column 204 on both sides thereof, and passes through the connecting column 203 to the inside of the connecting plate 102. The side of the fixing column 204 away from the connecting plate 102 is connected and fixed with a contraction spring 205, and is located inside the connecting column 203.

[0026] The reset mechanism 3 includes a telescopic column 301, which is slidably connected to the top of the connecting plate 102 and is located on both sides of the connecting column 203. A telescopic spring 302 is connected and fixed to one side of the telescopic column 301 and is located inside the connecting plate 102. A sliding plate 303 is slidably connected to the inside of the connecting plate 102 and is located at the bottom of the telescopic column 301 and at one side of the connecting column 203. A reset spring 305 is connected and fixed to the top of the sliding plate 303 away from the connecting column 203. A limit block 304 is connected and fixed to the side of the reset spring 305 away from the sliding plate 303 and is located inside the connecting plate 102. A buffer plate 307 is installed at the bottom end of the connecting plate 102 and is sleeved with the outer wall of the limit column 206. A damping spring 306 is connected and fixed to the bottom end of the buffer plate 307 and is sleeved with the outer wall of the limit column 206.

[0027] Through the mutual cooperation between the internal parts of the connecting mechanism 2, the connecting plate 102 is convenient for driving the hammer 101 to be lifted, so that the hammer 101 is in a coaxial state with the concentric axis of the detection structure main body 1, and through the mutual cooperation between the internal parts of the reset mechanism 3, the connecting plate 102 is convenient for driving the hammer 101 to fall freely to strike the detection structure main body 1.

[0028] Refer to the instruction manual Figure 1-4 A fixing groove matching the fixing column 204 is opened inside the connecting plate 102, a movable groove matching the fixing column 204 is opened inside the connecting column 203, and a limiting groove matching the connecting plate 102 is opened between the supporting columns 201. The fixing groove opened inside the connecting plate 102 facilitates the connecting column 203 to be connected and fixed to the connecting plate 102 through the fixing column 204.

[0029] Refer to the instruction manual Figure 1-4 A sliding groove matching the telescopic column 301 is opened inside the connecting plate 102, and a telescopic groove matching the sliding plate 303 is opened inside the connecting plate 102. The sliding groove inside the connecting plate 102 facilitates the telescopic column 301 to slide inside the connecting plate 102.

[0030] Refer to the instruction manual Figure 1-4 A circular arc surface matching the outer wall of the connecting column 203 is provided on the side of the sliding plate 303 close to the connecting column 203, and a conical groove matching the telescopic column 301 is provided on the top of the sliding plate 303. The circular arc surface on one side of the sliding plate 303 facilitates the sliding plate 303 to squeeze the fixed column 204 and contact the outer wall of the connecting column 203.

[0031] How this utility works:

[0032] Refer to the instruction manual Figure 1-4, by contacting the connecting column 203 and the connecting plate 102 with each other, the connecting plate 102 squeezes the fixed column 204, and the fixed column 204 squeezes the contraction spring 205 to shrink and move, and the fixed column 204 moves to the inside of the connecting column 203, so that the connecting column 203 can move to the inside of the connecting plate 102, and at the same time, the squeezing of the fixed column 204 by the inside of the connecting plate 102 is released, so that the contraction spring 205 is reset and pushes the fixed column 204 to move to the inside of the connecting plate 102, and the connection and fixation between the connecting column 203 and the connecting plate 102 are completed, and then the crane drives the connecting plate 102 to move through the connecting column 203, so that the movement of the connecting plate 102 drives the hammer 101 to move, and the connecting plate 102 moves on the supporting column 201 through the limiting column 206, so that the connecting plate 102 is limited and moved, so that the movement of the connecting plate 102 will not drive the hammer 101 to shake due to the shaking, and the hammer 101 and the detection structure main body 1 are always in a coaxial state;

[0033] Refer to the instruction manual Figure 1-4 , the connecting plate 102 moves and contacts the limiting plate 202, so that the limiting plate 202 squeezes the telescopic column 301 at the top of the connecting plate 102, and the telescopic column 301 squeezes the telescopic spring 302 to shrink and move, so that the telescopic column 301 moves to push the sliding plate 303 to squeeze the return spring 305 on one side of the limiting block 304, so that the sliding plate 303 squeezes the return spring 305 to shrink and move, and the sliding plate 303 moves to push the fixed column 204 to squeeze the shrinkage spring 205 and move from the connecting plate 102 to the connecting column 2 03, the connection between the connecting column 203 and the connecting plate 102 is released, so that the hammer body 101 falls under its own gravity, slides on the limit column 206 through the connecting plate 102, and knocks the detection structure body 1, so as to complete the data detection of the foundation pile to be tested. At the same time, the connecting plate 102 will contact the buffer plate 307, so that the buffer plate 307 squeezes the shock-absorbing spring 306 to contract and move, absorb the kinetic energy of the hammer body 101, and reduce the damage of the kinetic energy of the hammer body 101 to the detection structure body 1.

[0034] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-guided drop hammer assembly structure for pile foundation high strain detection, comprising a detection structure main body (1), characterized in that: A hammer body (101) is installed at the top of the detection structure body (1), and a connecting plate (102) is connected and fixed to the top of the hammer body (101). Connecting mechanisms (2) are connected and fixed to both sides of the top of the detection structure body (1) and penetrate into the interior of the connecting plate (102). Reset mechanisms (3) are slidably connected to both sides of the top of the connecting plate (102) and penetrate into the interior of the connecting plate (102); The connecting mechanism (2) comprises a supporting column (201), the supporting column (201) being located on both sides of the connecting plate (102) and being connected and fixed to the top of the detection structure body (1), the top of the supporting column (201) being connected and fixed to a limiting plate (202), the top of the limiting plate (202) being slidably connected to a connecting column (203) which penetrates the limiting plate (202) to the inside of the connecting plate (102), and the top of the detection structure body (1) being provided with a connecting column (203) located on the connecting plate (102). ), and is located between the support columns (201), and penetrates the connecting plate (102) to the bottom end of the limiting plate (202); the connecting column (203) penetrates to the inside of the connecting plate (102) and is slidably connected to the fixing column (204) on both sides, and penetrates the connecting column (203) to the inside of the connecting plate (102); the side of the fixing column (204) away from the connecting plate (102) is connected and fixed with a contraction spring (205), and is located inside the connecting column (203); The reset mechanism (3) comprises a telescopic column (301), the telescopic column (301) is slidably connected to the top of the connecting plate (102) and is located on both sides of the connecting column (203), one side of the telescopic column (301) is connected and fixed with a telescopic spring (302) and is located inside the connecting plate (102), the inside of the connecting plate (102) is slidably connected with a sliding plate (303) and is located at the bottom of the telescopic column (301) and is located on one side of the connecting column (203), the sliding plate (303) 03) A return spring (305) is connected and fixed to the top end of one side away from the connecting column (203), and the return spring (305) is connected and fixed to a limiting block (304) on one side away from the sliding plate (303), and is located inside the connecting plate (102). A buffer plate (307) is installed at the bottom end of the connecting plate (102), and is sleeved with the outer wall of the limiting column (206). A shock-absorbing spring (306) is connected and fixed to the bottom end of the buffer plate (307), and is sleeved with the outer wall of the limiting column (206).

2. The self-guided drop hammer assembly structure for pile foundation high strain detection according to claim 1, characterized in that: A fixing groove matching the fixing column (204) is provided inside the connecting plate (102), a moving groove matching the fixing column (204) is provided inside the connecting column (203), and a limiting groove matching the connecting plate (102) is provided between the supporting columns (201).

3. The self-guided drop hammer assembly structure for pile foundation high strain detection according to claim 1, characterized in that: A sliding groove matching the telescopic column (301) is provided inside the connecting plate (102), and a telescopic groove matching the sliding plate (303) is provided inside the connecting plate (102).

4. The self-guided drop hammer assembly structure for pile foundation high strain detection according to claim 1, characterized in that: A side of the sliding plate (303) close to the connecting column (203) is provided with an arc surface matching the outer wall of the connecting column (203), and a top end of the sliding plate (303) is provided with a conical groove matching the telescopic column (301).

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