Automatic hammering device for low-strain detection of pile foundation

Abstract

The utility model relates to the technical field of hammering devices, and discloses a pile foundation low strain detection automatic hammering device which comprises a ground, a hammering assembly is installed at the top of the ground, and a dust removal assembly is arranged at the top of the ground. According to the automatic hammering device for low strain detection of the pile foundation, the motor rotates to drive the rotating rod to rotate, the rotating rod rotates to enable the hook to rotate, so that the hook on the rotating rod can be pulled out and separated from the hook on the movable plate through rotation, and the movable plate can descend in a free falling body mode; the interior of the hammer body of the test hammer is connected with the hammer head through the spring, so that the problem that the hammer head bounces upwards can be reduced through the elasticity of the spring when the test hammer descends for hammering, the hammer head bounces again due to inertia, and the test accuracy can be influenced; through the arrangement of the assembly, the problem of inconsistent force caused by manual hammering can be reduced, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of hammering device technology, specifically an automatic hammering device for detecting low strain in pile foundations. Background Technology

[0002] Low-strain pile foundation testing is a method for determining the integrity of piles. This method uses a small hammer to strike the top of the pile, and a sensor attached to the top of the pile receives stress wave signals from the pile. Stress wave theory is used to study the dynamic response of the pile-soil system, and the measured velocity and frequency signals are analyzed to obtain information on the integrity of the pile.

[0003] The low-strain pile testing hammer device is a testing equipment used in the field of foundation engineering. It aims to improve the efficiency and accuracy of low-strain pile testing. By precisely controlling the height and drop point of the vibrating hammer, it is possible to strike the same point on the pile foundation multiple times at the same height, obtaining waveforms with consistent and comparable waveforms, thereby eliminating human error and improving the accuracy of testing.

[0004] The prior art patent document CN215211190U discloses a hammering device for detecting the integrity of low-strain reflected wave foundation piles. This device solves the problem of existing low-strain hammering equipment being inconvenient to carry and use by pre-inserting sensors into the foundation, connecting the sensors and the tester through wires, and finally rotating the connecting rod by hand. It reduces the labor required to carry the equipment for testing, increases the efficiency of the hammering equipment, and improves the practicality of the hammering equipment.

[0005] While the aforementioned prior art, which uses a low-strain reflected wave pile integrity testing hammering device to solve the problem of inconvenience in carrying low-strain hammering equipment and increase the efficiency of hammering work by pre-inserting sensors into the foundation, connecting the sensors to the testing instrument with wires, and finally rotating the connecting rod by hand, still requires manual hammering during the hammering test. This consumes a lot of manpower, and manual hammering cannot guarantee that each strike is exactly the same force as the previous one, which greatly affects the accuracy of the test and leads to variations in the test results. Multiple tests are required, reducing work efficiency. Therefore, we need an automatic hammering device for low-strain pile foundation testing. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic hammering device for low strain pile foundation testing, in order to solve the problem that the low strain reflected wave pile integrity testing hammering device proposed in the above-mentioned background technology requires manual hammering during the hammering test, which consumes a lot of manpower. In addition, manual hammering cannot guarantee that each hammering is exactly the same as the previous one, which will greatly affect the accuracy of the test, resulting in changes in the test results, requiring multiple tests, and reducing work efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic hammering device for low strain testing of pile foundations includes a ground surface, a pile body disposed inside the ground surface, a hammering assembly installed on the top of the ground surface, and a dust removal assembly disposed on the top of the ground surface.

[0009] The hammering assembly includes a support column, a fixed box is fixedly connected to the top of the support column, and a motor is provided on one side of the fixed box. The output end of the motor is detachably connected to a rotating rod through a coupling, and a hook is provided on the outer surface of the rotating rod. A movable plate is fixedly connected to the bottom of the hook, and a hammer body is installed at the bottom of the movable plate. A spring is provided inside the hammer body, and a hammer head is elastically connected to the bottom of the spring.

[0010] The dust removal assembly includes a base, a blower is mounted on the top of the base, an air supply pipe is provided on one side of the blower, a slider is mounted on one side of the blower, and a support frame is slidably connected to one side of the slider. A filter screen is installed inside the support frame.

[0011] Preferably, a display screen is provided on the top of the ground, and a sensor is installed on one side of the display screen.

[0012] Preferably, the support column is fixed to the motor via a fixed box, and there are two support columns.

[0013] Preferably, the motor forms a rotating structure with the hook via a rotating rod, and there are multiple hooks; the support column forms a sliding structure with the hook via a movable plate.

[0014] Preferably, the movable plate is fixed by the hammer body and the spring, and the spring is installed inside the hammer body. The hammer body and the hammer head form an elastic structure by the spring.

[0015] Preferably, the base is fixed by a blower and an air supply pipe, with one end of the air supply pipe leading to the ground.

[0016] Preferably, the hair dryer has a sliding structure formed by a slider and a support frame, and there are two sliders. The sliders form a sliding structure with the filter screen through the support frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are: this automatic hammering device for low strain detection of pile foundations,

[0018] First, this utility model includes a support column, a fixed box, a motor, a rotating rod, a hook, a moving plate, a hammer body, a spring, and a hammer head. Starting the motor causes the rotating rod to rotate, which in turn causes the hook to rotate. This allows the hook on the rotating rod to be separated from the hook on the moving plate, enabling the moving plate to fall freely. The test hammer mounted at the bottom of the moving plate then falls synchronously, performing a hammering test. The hammer body is internally connected to the hammer head via a spring. This spring's elasticity reduces the problem of the hammer head bouncing upwards during the fall, which can affect test accuracy. This component reduces inconsistent force caused by manual hammering, significantly improving work efficiency.

[0019] Secondly, this utility model is equipped with a base, a blower, an air supply pipe, a slider, a support frame, and a filter. When the blower is turned on, the air blown out by the blower is blown to the outer surface of the pile body through the air supply pipe, blowing away the dirt and dust on the outer surface of the pile body. This can reduce the problem of dirt standing on the pile body surface affecting the test accuracy. The filter set at the air inlet of the blower can filter the air drawn in by the blower, so as to reduce the problem of the blower being damaged by dust. When the filter needs to be cleaned, simply pull up the support frame box, and the support frame can be slid off by sliding the slider, so that the filter can be disassembled and cleaned. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the front sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the motor and hook structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the hair dryer and filter structure of this utility model.

[0024] In the diagram: 1. Ground; 2. Pile foundation; 3. Hammering assembly; 301. Support column; 302. Fixing box; 303. Motor; 304. Rotating rod; 305. Hook; 306. Moving plate; 307. Hammer body; 308. Spring; 309. Hammer head; 4. Display screen; 5. Sensor; 6. Dust removal assembly; 601. Base; 602. Blower; 603. Air duct; 604. Slider; 605. Support frame; 606. Filter. Detailed Implementation

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

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 An automatic hammering device for low strain detection of pile foundation includes a ground 1, a pile body 2 is arranged inside the ground 1, a hammering component 3 is installed on the top of the ground 1, and a dust removal component 6 is arranged on the top of the ground 1.

[0027] The hammering assembly 3 includes a support column 301, a fixed box 302 is fixedly connected to the top of the support column 301, and a motor 303 is provided on one side of the fixed box 302. The output end of the motor 303 is detachably connected to a rotating rod 304 through a coupling. A hook 305 is provided on the outer surface of the rotating rod 304. A movable plate 306 is fixedly connected to the bottom of the hook 305. A hammer body 307 is installed at the bottom of the movable plate 306. A spring 308 is provided inside the hammer body 307. A hammer head 309 is elastically connected to the bottom of the spring 308.

[0028] The dust removal assembly 6 includes a base 601, a blower 602 is mounted on the top of the base 601, an air supply pipe 603 is provided on one side of the blower 602, a slider 604 is mounted on one side of the blower 602, and a support frame 605 is slidably connected to one side of the slider 604. A filter 606 is installed inside the support frame 605.

[0029] Through the above technical solution, starting the motor 303 causes the rotating rod 304 to rotate, which in turn causes the hook 305 to rotate. This allows the hook 305 on the rotating rod 304 to be separated from the hook 305 on the moving plate 306, enabling the moving plate 306 to fall freely. This allows the test hammer mounted at the bottom of the moving plate 306 to fall synchronously, achieving the purpose of hammering test. The hammer body 307 of the test hammer is connected to the hammer head 309 through a spring 308. This spring 308 reduces the problem of the hammer head 309 bouncing up during the descent and hammering. If the hammer head 309 falls and bounces up due to inertia, it will affect the accuracy of the test. This component reduces the problem of inconsistent force caused by manual hammering, greatly improving work efficiency.

[0030] Specifically, a display screen 4 is installed on the top of the ground 1, and a sensor 5 is installed on one side of the display screen 4.

[0031] Through the above technical solution, the display screen 4 allows staff to easily observe the test results. The display screen 4 is connected to the sensor 5 via a transmission line. The sensor 5 is installed on the pile body 2 and can then perform the detection function.

[0032] Specifically, the support column 301 forms a fixed structure with the motor 303 through the fixed box 302, and there are two support columns 301.

[0033] Through the above technical solution, the fixed box 302 is installed and connected to the ground 1 by two support columns 301, and the motor 303 is installed on one side of the fixed box 302. The setting of the support columns 301 facilitates the installation of this component.

[0034] Specifically, the motor 303 forms a rotating structure with the hook 305 via the rotating rod 304, and there are multiple hooks 305. The support column 301 forms a sliding structure with the hook 305 via the moving plate 306.

[0035] Through the above technical solution, the rotation of the motor 303 can drive the rotating rod 304 to rotate, and the rotation of the rotating rod 304 can synchronously drive the hook 305 to rotate. There are two hooks 305 installed on the top of the moving plate 306. The hooks 305 on the rotating rod 304 separate from the hooks 305 on the moving plate 306 by rotation, so that the moving plate 306 can descend due to inertia, which plays the role of fixing the moving plate 306.

[0036] Specifically, the movable plate 306 forms a fixed structure with the hammer body 307 and the spring 308, and the spring 308 is installed inside the hammer body 307. The hammer body 307 forms an elastic structure with the hammer head 309 through the spring 308.

[0037] With the above technical solution, when the moving plate 306 descends, it drives the hammer body 307 to descend synchronously. The hammer body 307 is connected to the hammer head 309 through the internal spring 308. When the hammer head 309 falls and strikes, the elasticity of the spring 308 can provide a buffer force for the hammer head 309, reducing the problem of the hammer head 309 rebounding after impact, thus improving the accuracy of the test.

[0038] Specifically, the base 601 is fixed by the blower 602 and the air supply pipe 603, and one end of the air supply pipe 603 leads to the ground 1.

[0039] By using the above technical solution, the blower 602 is activated, and the air blown out by the blower 602 is blown to the outer surface of the pile body 2 through the air supply pipe 603, thereby blowing away the dust and dirt on the surface of the pile body 2 and reducing the problem of the test accuracy being affected by the dirt sticking together.

[0040] Specifically, the hair dryer 602 forms a sliding structure with the support frame 605 via the slider 604, and there are two sliders 604. The sliders 604 form a sliding structure with the filter 606 via the support frame 605.

[0041] Through the above technical solution, the filter 606 can reduce the problem of dust being drawn into the blower 602 and causing damage to the blower 602. When the filter 606 needs to be cleaned, simply pull the support frame 605 upwards, and the slider 604 will drive the support frame 605 to slide, so that the support frame 605 can be removed and the filter 606 can be disassembled, which facilitates the maintenance and disassembly of the filter 606.

[0042] Working Principle: When using this automatic hammering device for low-strain pile foundation testing, firstly, the motor 303 is started. The rotation of the motor 303 drives the rotating rod 304 to rotate, which in turn drives the hook 305 to rotate. This causes the hook 305 on the rotating rod 304 to disengage from the hook 305 on the moving plate 306, allowing the moving plate 306 to descend due to inertia. The descent of the moving plate 306 causes the hammer body 307 to descend synchronously, thus enabling the hammering test on the pile body 2. The hammer body 307 is connected to the hammer head 309 via a spring 308, whose elasticity provides cushioning to the hammer head 309 during hammering. To prevent the hammer from rebounding, before conducting the hammer test, the blower 602 can be activated, and the air blown out through the air pipe 603 can be directed towards the surface of the pile body 2 to clean dust and dirt, improving test accuracy. The filter screen 606 can reduce the problem of damage to the blower 602 due to dust inhalation. When the filter screen 606 needs to be cleaned, simply pull the support frame 605 upwards, and the slider 604 will drive the support frame 605 to slide, so that the support frame 605 can be removed and the internal filter screen 606 can be disassembled and cleaned. This completes all the work. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit defined by the appended claims and their equivalents.

Claims

1. A pile foundation low strain detection automatic hammering device, comprising a ground (1), characterized in that: The ground (1) is provided with piles (2) inside, a hammer assembly (3) is installed on the top of the ground (1), and a dust removal assembly (6) is provided on the top of the ground (1). The hammering assembly (3) includes a support column (301), a fixed box (302) is fixedly connected to the top of the support column (301), and a motor (303) is provided on one side of the fixed box (302). The output end of the motor (303) is detachably connected to a rotating rod (304) via a coupling. A hook (305) is provided on the outer surface of the rotating rod (304). A movable plate (306) is fixedly connected to the bottom of the hook (305), and a hammer body (307) is installed at the bottom of the movable plate (306). A spring (308) is provided inside the hammer body (307), and a hammer head (309) is elastically connected to the bottom of the spring (308). The dust removal assembly (6) includes a base (601), a blower (602) is installed on the top of the base (601), and an air supply pipe (603) is provided on one side of the blower (602). A slider (604) is installed on one side of the blower (602), and a support frame (605) is slidably connected to one side of the slider (604). A filter screen (606) is installed inside the support frame (605).

2. The automatic hammering device for low strain detection of pile foundation according to claim 1, characterized in that: A display screen (4) is provided on the top of the ground (1), and a sensor (5) is installed on one side of the display screen (4).

3. The automatic hammering device for low strain detection of pile foundation according to claim 1, characterized in that: The support column (301) forms a fixed structure with the motor (303) through the fixed box (302), and there are two support columns (301).

4. The automatic hammering device for low strain detection of pile foundation according to claim 1, characterized in that: The motor (303) forms a rotating structure with the hook (305) via the rotating rod (304), and there are multiple hooks (305). The support column (301) forms a sliding structure with the hook (305) via the moving plate (306).

5. The automatic hammering device for low strain detection of pile foundation according to claim 1, characterized in that: The movable plate (306) forms a fixed structure through the hammer body (307) and the spring (308), and the spring (308) is installed inside the hammer body (307). The hammer body (307) forms an elastic structure through the spring (308) and the hammer head (309).

6. The automatic hammering device for low strain testing of pile foundations according to claim 1, characterized in that: The base (601) is fixed by a blower (602) and an air supply pipe (603), and one end of the air supply pipe (603) leads to the ground (1).

7. The automatic hammering device for low strain detection of pile foundation according to claim 1, characterized in that: The hair dryer (602) forms a sliding structure with the support frame (605) via a slider (604), and there are two sliders (604). The sliders (604) form a sliding structure with the filter screen (606) via the support frame (605).

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