Pile foundation low strain detection automatic hammering device

Abstract

The utility model belongs to the technical field of foundation, specifically disclose a pile foundation low strain detection automatic hammering device, including equipment body, the bottom rotationally connected of equipment body has three support legs, the inside of support leg is opened has the sliding slot, the inside sliding connection of sliding slot has the limit rod, the bottom fixed connection of limit rod has the adjusting leg, the outer surface rotationally connected of adjusting leg has the steady frame, the bottom of steady frame is provided with steady nail, this pile foundation low strain detection automatic hammering device, through the rotation ring is on the support cylinder and moves up and down, through the limitation of connecting rod simultaneously, make the moving direction of first connecting ring get the restriction, and through the up and down movement of first connecting ring, make connecting rod drive support leg and open and store, make device can more conveniently according to the different development of different size of topography, the up and down telescoping of adjusting leg simultaneously, and realize the length of the extension of adjusting leg gets the regulation.

Description

Technical Field

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

[0002] In the field of foundation engineering testing, there are methods for testing pile integrity, such as low strain method, high strain method, core drilling method and sonic logging method. Among them, low strain method is the most widely used method at home and abroad. It is a method based on one-dimensional linear elasticity theory, using transient hammering, and determining the pile integrity by measuring the pile top acceleration or velocity response time domain curve.

[0003] A search revealed a Chinese patent publication number, CN222140134U, which discloses an automatic hammering device for low-strain pile foundation testing. The device comprises: a support plate with a limiting opening; a connecting rod movably positioned within the limiting opening; a hammer fixed to the bottom of the connecting rod; an air cushion fixedly installed at the bottom of the hammer; and a stabilizing component disposed on the support plate, used to stabilize the angle of the connecting rod.

[0004] While the aforementioned patents can guarantee the advantages of vertical hammering, the aforementioned devices still have the following problems: during use, because the device is placed stably by four support legs, it is difficult for the device to adapt to complex terrains such as slopes or narrow spaces, thus reducing the scope of application of the device. In view of the above, technical innovation is carried out on the basis of the existing device. Utility Model Content

[0005] The purpose of this invention is to provide an automatic hammering device for detecting low strain in pile foundations, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic hammering device for low strain detection of pile foundations, comprising a device body, three support legs rotatably connected to the bottom of the device body, a sliding groove provided inside the support legs, a limit rod slidably connected inside the sliding groove, an adjusting leg fixedly connected to the bottom of the limit rod, a stabilizing frame rotatably connected to the outer surface of the adjusting leg, a stabilizing nail provided at the bottom of the stabilizing frame, a support cylinder fixedly connected to the bottom of the device body, the support cylinder having a hollow internal structure, a threaded surface provided on the outer surface of the support cylinder, a rotating ring threadedly connected to the outer surface of the support cylinder, a first connecting ring rotatably connected to the top of the rotating ring, the first connecting ring slidably sleeved on the support cylinder, a connecting rod rotatably connected to the outer surface of the first connecting ring, and the side of the connecting rod away from the first connecting ring rotatably connected to the surface of the support leg.

[0007] Preferably, a transmission rod is fixedly connected to one side of the support leg, a threaded rod extending to the outside of the transmission rod is rotatably connected inside the transmission rod, and a stabilizing rod extending to the outside of the transmission rod is slidably connected inside the transmission rod.

[0008] Preferably, the stabilizing rod is fixedly connected to the surface of the adjusting leg on the side near the adjusting leg, and the surface of the threaded rod is connected to the internal thread of the stabilizing rod.

[0009] Preferably, two symmetrical support rings are fixedly connected to the outer surface of the support cylinder, and a second connecting ring is fixedly connected to the bottom of the rotating ring and the top of the first connecting ring.

[0010] Preferably, a protective sleeve is fixedly connected between the support ring and the second connecting ring, and the protective sleeve is movably sleeved on the support cylinder.

[0011] Preferably, a support block is fixedly connected to one side of the adjusting leg, the support block is disposed on the lower side of the stabilizing rod, a stabilizing block is fixedly connected to the outer surface of the stabilizing frame, a fixing groove is provided on one side of the stabilizing block, a power groove extending to the outside of the support block is provided inside the support block, a fixing frame is slidably connected inside the power groove, and the side of the fixing frame near the fixing groove is inserted into the inside of the fixing groove.

[0012] Preferably, both the fixing frame and the power channel have T-shaped cross-sections, and the bottom of the fixing frame is provided with an inclined surface.

[0013] Preferably, a spring is fixedly connected to the surface of the fixing frame, and the top end of the spring is fixedly connected to the inner wall of the power groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This automatic hammering device for low-strain pile foundation testing moves up and down on a support cylinder via a rotating ring. Simultaneously, the movement direction of the first connecting ring is restricted by a connecting rod. The up-and-down movement of the first connecting ring causes the connecting rod to open and retract the support legs. This allows the device to easily expand to different sizes according to different terrains. The vertical extension and retraction of the legs can also be adjusted, allowing for adjustment of the height of the support and adjustment legs according to different environments. Furthermore, the device can be leveled when used on uneven surfaces, adapting to complex environments and expanding its application range.

[0015] 2. The automatic hammering device for low strain testing of pile foundations uses a spring reset to allow the fixing frame to slide into the fixing groove, thereby fixing the position of the stabilizing frame. This allows the stabilizing nails on the stabilizing frame to be set inward, and makes the device easier to store and transport. To a certain extent, it reduces the possibility of injury to workers when the stabilizing nails are on the outside. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an automatic hammer impact device for low strain detection of pile foundation according to this utility model; Figure 2 This is a schematic diagram of the structure of the support cylinder of this utility model; Figure 3 This is a schematic diagram of the transmission rod of this utility model; Figure 4 This is a schematic diagram of the structure of the support block of this utility model.

[0017] In the diagram: 1. Equipment body; 2. Support leg; 3. Adjustable leg; 4. Slide groove; 5. Limiting rod; 6. Transmission rod; 7. Stabilizing rod; 8. Threaded rod; 9. Connecting rod; 10. Support cylinder; 11. Protective sleeve; 12. Rotating ring; 13. First connecting ring; 14. Support ring; 15. Second connecting ring; 16. Support block; 17. Stabilizing frame; 18. Stabilizing block; 19. Fixing groove; 20. Fixing frame; 21. Power groove; 22. Spring. Detailed Implementation

[0018] Please see Figures 1-4This utility model provides a technical solution: an automatic hammering device for low strain detection of pile foundations, including a device body 1. The device body 1 is an existing structure and will not be described in detail here. The device body 1 can automatically hammer for low strain detection of pile foundations through a hammer installed on it. Three support legs 2 are rotatably connected to the bottom of the device body 1. The three support legs 2 are provided with the same structure. The inside of the support leg 2 is provided with a sliding groove 4. The sliding groove 4 is slidably connected to a limit rod 5. The bottom of the limit rod 5 is fixedly connected to an adjusting leg 3. The adjusting leg 3 can support the device. A stabilizing frame 17 is rotatably connected to the outer surface of the adjusting leg 3. The bottom of 7 is equipped with a stabilizing nail. By inserting the stabilizing nail into the soil, the device can be more stably fixed. The bottom of the device body 1 is fixedly connected to a support cylinder 10. The inside of the support cylinder 10 is a hollow structure. The striking hammer of the device is located inside the support cylinder 10. The outer surface of the support cylinder 10 is provided with threads. A rotating ring 12 is threadedly connected to the outer surface of the support cylinder 10. A first connecting ring 13 is rotatably connected to the top of the rotating ring 12. The first connecting ring 13 is slidably sleeved on the support cylinder 10. A connecting rod 9 is rotatably connected to the outer surface of the first connecting ring 13. The side of the connecting rod 9 away from the first connecting ring 13 is rotatably connected to the surface of the support leg 2.

[0019] By having the operator rotate the rotating ring 12, the rotating ring 12 moves up and down on the support cylinder 10. At the same time, the movement direction of the first connecting ring 13 is restricted by the connecting rod 9. The up and down movement of the first connecting ring 13 causes the connecting rod 9 to drive the support leg 2 to open and close, so that the device can be more easily unfolded to different sizes according to different terrains and can be placed more stably.

[0020] A transmission rod 6 is fixedly connected to one side of the support leg 2. A threaded rod 8 extending to the outside of the transmission rod 6 is rotatably connected inside the transmission rod 6. A stabilizing rod 7 extending to the outside of the transmission rod 6 is slidably connected inside the transmission rod 6. The side of the stabilizing rod 7 near the adjusting leg 3 is fixedly connected to the surface of the adjusting leg 3. The surface of the threaded rod 8 is threadedly connected to the inside of the stabilizing rod 7. When the operator rotates the threaded rod 8, it drives the stabilizing rod 7 to move up and down, thereby realizing the vertical extension and retraction of the adjusting leg 3 and adjusting the extension length of the adjusting leg 3. This allows the device to adjust the height of the support leg 2 and the adjusting leg 3 according to different environments. It also allows the device to be leveled when used on uneven roads, making it adaptable to complex environments and expanding its application range.

[0021] Two symmetrical support rings 14 are fixedly connected to the outer surface of the support cylinder 10. The bottom of the rotating ring 12 and the top of the first connecting ring 13 are both fixedly connected to the second connecting ring 15. A protective sleeve 11 is fixedly connected between the support ring 14 and the second connecting ring 15. The protective sleeve 11 is movably sleeved on the support cylinder 10. The protective sleeve 11 is a corrugated pipe. The protective sleeve 11 can protect the support cylinder 10 and enable the device to operate more smoothly.

[0022] A support block 16 is fixedly connected to one side of the adjusting leg 3. The support block 16 is located on the lower side of the stabilizing rod 7. A stabilizing block 18 is fixedly connected to the outer surface of the stabilizing frame 17. A fixing groove 19 is provided on one side of the stabilizing block 18. A power groove 21 extending to the outside of the support block 16 is provided inside the support block 16. A fixing frame 20 is slidably connected inside the power groove 21. The cross-section of the fixing frame 20 and the power groove 21 are both T-shaped. The bottom of the fixing frame 20 is provided with an inclined surface. The side of the fixing frame 20 near the fixing groove 19 is inserted into the inside of the fixing groove 19. The fixing frame 20 can slide into and out of the inside of the fixing groove 19, and realize the fixing and releasing of the position of the stabilizing block 18 and the stabilizing frame 17. At the same time, the support block 16 is a certain distance away from the fixing groove 19 so that the support block 16 will not affect the rotation of the fixing groove 19. A spring 22 is fixedly connected to the surface of the fixing frame 20. The top of the spring 22 is fixedly connected to the inner wall of the power groove 21. The movement of the fixing frame 20 can compress and reset the power groove 21.

[0023] When the device needs to be stored, the operator rotates the stabilizing frame 17. The inclined surface at the bottom of the fixing frame 20 allows the stabilizing frame 17 to rotate, which in turn moves the fixing frame 20, compressing the spring 22. When the stabilizing frame 17 rotates to the appropriate position, the spring 22 returns to its original position, causing the fixing frame 20 to slide into the fixing groove 19. This fixes the position of the stabilizing frame 17, allowing the stabilizing pins on the stabilizing frame 17 to face inwards. This makes it easier to store and transport the device, and to some extent reduces the risk of injury to the operator if the stabilizing pins are on the outside.

[0024] Working principle: For this type of automatic hammering device for low strain detection of pile foundations, the operator first rotates the rotating ring 12, causing the rotating ring 12 to move up and down on the support cylinder 10. At the same time, the movement direction of the first connecting ring 13 is restricted by the connecting rod 9. The up and down movement of the first connecting ring 13 causes the connecting rod 9 to drive the support leg 2 to open and close, so that the device can be easily unfolded to different sizes according to different terrains. The device can be supported by the adjusting leg 3. The outer surface of the adjusting leg 3 is rotatably connected to the stabilizing frame 17. The bottom of the stabilizing frame 17 is equipped with stabilizing nails. By inserting the stabilizing nails into the soil, the device can be fixed more stably. The device body 1 can perform automatic hammering for low strain detection of pile foundations through the hammer set on it. The threaded rod 8 is rotated by the staff, which drives the stabilizing rod 7 to move up and down, thereby realizing the extension and retraction of the adjusting leg 3 and adjusting the extension length of the adjusting leg 3. This allows the device to adjust the height of the supporting leg 2 and the adjusting leg 3 according to different environments. At the same time, it allows the device to be leveled when used on uneven roads, making the device adaptable to complex environments and expanding its application range. When the device needs to be stored, the operator rotates the stabilizing frame 17. The inclined surface at the bottom of the fixing frame 20 allows the stabilizing frame 17 to rotate, which in turn moves the fixing frame 20, compressing the spring 22. When the stabilizing frame 17 rotates to the appropriate position, the spring 22 returns to its original position, causing the fixing frame 20 to slide into the fixing groove 19. This fixes the position of the stabilizing frame 17, allowing the stabilizing pins on the stabilizing frame 17 to face inwards. This makes it easier to store and transport the device, and to some extent reduces the risk of injury to the operator if the stabilizing pins are on the outside.

[0025] 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 of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic hammering device for low strain testing of pile foundations, comprising a device body (1), characterized in that: The bottom of the device body (1) is rotatably connected to three support legs (2). The inside of the support legs (2) is provided with a sliding groove (4). The sliding groove (4) is slidably connected to a limit rod (5). The bottom of the limit rod (5) is fixedly connected to an adjusting leg (3). The outer surface of the adjusting leg (3) is rotatably connected to a stabilizing frame (17). The bottom of the stabilizing frame (17) is provided with a stabilizing nail. The bottom of the device body (1) is fixedly connected to a support cylinder (10). The inside of the support cylinder (10) is a hollow structure. The outer surface of the support cylinder (10) is provided with a thread. The outer surface of the support cylinder (10) is threadedly connected to a rotating ring (12). The top of the rotating ring (12) is rotatably connected to a first connecting ring (13). The first connecting ring (13) is slidably sleeved on the support cylinder (10). The outer surface of the first connecting ring (13) is rotatably connected to a connecting rod (9). The side of the connecting rod (9) away from the first connecting ring (13) is rotatably connected to the surface of the support leg (2).

2. The automatic hammering device for low strain testing of pile foundations according to claim 1, characterized in that: A transmission rod (6) is fixedly connected to one side of the support leg (2). A threaded rod (8) extending to the outside of the transmission rod (6) is rotatably connected inside the transmission rod (6). A stabilizing rod (7) extending to the outside of the transmission rod (6) is slidably connected inside the transmission rod (6).

3. The automatic hammering device for low strain testing of pile foundations according to claim 2, characterized in that: The stabilizing rod (7) is fixedly connected to the surface of the adjusting leg (3) on the side near the adjusting leg (3), and the surface of the threaded rod (8) is connected to the internal thread of the stabilizing rod (7).

4. The automatic hammering device for low strain testing of pile foundations according to claim 3, characterized in that: Two symmetrical support rings (14) are fixedly connected to the outer surface of the support cylinder (10), and a second connecting ring (15) is fixedly connected to the bottom of the rotating ring (12) and the top of the first connecting ring (13).

5. The automatic hammering device for low strain detection of pile foundations according to claim 4, characterized in that: A protective sleeve (11) is fixedly connected between the support ring (14) and the second connecting ring (15), and the protective sleeve (11) is movably sleeved on the support cylinder (10).

6. The automatic hammering device for low strain detection of pile foundations according to claim 1, characterized in that: A support block (16) is fixedly connected to one side of the adjusting leg (3). The support block (16) is located on the lower side of the stabilizing rod (7). A stabilizing block (18) is fixedly connected to the outer surface of the stabilizing frame (17). A fixing groove (19) is provided on one side of the stabilizing block (18). A power groove (21) extending to the outside of the support block (16) is provided inside the support block (16). A fixing frame (20) is slidably connected inside the power groove (21). The side of the fixing frame (20) close to the fixing groove (19) is inserted into the inside of the fixing groove (19).

7. The automatic hammering device for low strain detection of pile foundations according to claim 6, characterized in that: The cross-sections of the fixed frame (20) and the power channel (21) are both T-shaped, and the bottom of the fixed frame (20) is provided with an inclined surface.

8. The automatic hammering device for low strain detection of pile foundations according to claim 6, characterized in that: A spring (22) is fixedly connected to the surface of the fixing frame (20), and the top end of the spring (22) is fixedly connected to the inner wall of the power groove (21).

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