A foundation bearing capacity sounding hammer

Abstract

The utility model relates to the field of foundation construction discloses a foundation bearing capacity sounding hammer, including support frame, the inner wall sliding connection of support frame has sliding plate, the lower surface fixed connection of sliding plate has the sounding rod, the bottom fixed connection of sounding rod has the cross pein, the outer wall sliding connection of sounding rod has the counterweight, the outer wall fixed connection of sounding rod has the support block, the outer wall of support frame is provided with compensation pulling mechanism, the compensation pulling mechanism includes pulling assembly, the pulling assembly includes mounting seat, the mounting seat fixed connection is in the top of support frame. In the utility model, the automatic lifting of counterweight is realized through the pulling assembly of motor drive, ensures that the distance of each counterweight lifting upwards is same, does not pull sounding rod upwards, makes sounding rod be able to steady down pressure and detect, and the scale line and stable frame are more convenient for staff to read test data in real time, guarantee the accuracy of data.

Description

Technical Field

[0001] This utility model relates to the field of foundation construction, and in particular to a foundation bearing capacity penetration hammer. Background Technology

[0002] The cone penetration test (DPT) is mainly used to test the bearing capacity of the foundation. It consists of three main parts: a probe, a penetration rod, and a hammer. It is mainly used for dynamic cone penetration tests, also known as dynamic cone penetration tests or DPTs. It uses a hammer of a certain mass to drive a standard-sized probe connected to the probe rod into the soil. The mechanical properties of the soil are determined by the number of hammer blows required when the probe penetrates 10cm or 30cm into the soil (where N10 is counted once every 30cm, and N63.5 and N120 are counted once every 10cm).

[0003] Existing dynamic penetration testing methods rely on manually lifting a hammer repeatedly for testing. However, when manually lifting the hammer, it is impossible to guarantee that the vertical lifting distance will always be the same. Furthermore, when lifting the hammer, excessive force can easily be used, causing the probe rod to be pulled out and deviate, resulting in data errors. Therefore, a foundation bearing capacity penetration hammer is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a foundation bearing capacity penetration hammer, which aims to improve the problem in the prior art that "when manually lifting the hammer upwards, it is not possible to guarantee that the vertical upward lifting distance is always the same, and it is easy to use excessive force to pull out the probe rod, causing the probe rod to deviate and resulting in data errors".

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a foundation bearing capacity penetration hammer, comprising a support frame, a sliding plate slidably connected to the inner wall of the support frame, a probe rod fixedly connected to the lower surface of the sliding plate, a core hammer fixedly connected to the bottom end of the probe rod, a counterweight block slidably connected to the outer wall of the probe rod, a support block fixedly connected to the outer wall of the probe rod, a compensation traction mechanism provided on the outer wall of the support frame, the compensation traction mechanism comprising a traction assembly, the traction assembly comprising a mounting base, the mounting base fixedly connected to the top of the support frame, a motor mounted on the outer wall of the mounting base, a drum fixedly connected to the output shaft of the motor, a connecting block slidably connected to the inner wall of the mounting base, a movable wheel rotatably connected to the inner wall of the connecting block, a fixed wheel rotatably connected to the inner wall of the mounting base, and a pull rope provided on the outer wall of the drum.

[0006] As a further description of the above technical solution:

[0007] The compensation traction mechanism further includes an adjustment component, which includes a connecting rod fixedly connected to the upper surface of the sliding plate. A movable frame is fixedly connected to the top end of the connecting rod, and a rack is fixedly connected to the outer wall of the movable frame. The rack meshes with a gear, and a lead screw is fixedly connected to the inner wall of the gear.

[0008] As a further description of the above technical solution:

[0009] One end of the pull rope is fixedly connected to the outer wall of the drum, and the other end of the pull rope is wound around the drum and passes through the moving wheel and the fixed wheel in sequence, and is fixedly connected to the outer wall of the counterweight.

[0010] As a further description of the above technical solution:

[0011] The gear is rotatably connected to the inner wall of the mounting base, and the lead screw is rotatably connected to the inner wall of the mounting base.

[0012] As a further description of the above technical solution:

[0013] A stabilizing frame is fixedly connected to the inner wall of the support frame, and scale lines are opened on the outer wall of the probe.

[0014] As a further description of the above technical solution:

[0015] The connecting block is disposed on the outer wall of the lead screw, the drum is rotatably connected to the inner wall of the mounting base, and the moving wheel is disposed parallel to the drum.

[0016] As a further description of the above technical solution:

[0017] The shape of the movable frame is set to hollow.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the fixed wheel is tangent to the center line of the counterweight.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the automatic lifting of the counterweight is achieved by setting a motor-driven traction component, which ensures that the counterweight is lifted up the same distance each time, and does not pull the probe upward, allowing the probe to be pressed down stably for testing. At the same time, the scale line and the stabilizer frame make it convenient for staff to read the test data in real time, ensuring the accuracy of the data.

[0022] 2. In this utility model, by setting an adjustment component, the adjustment process based on rack, gear and screw transmission is used to sense and compensate for the displacement caused by the probe penetrating into the soil in real time, dynamically adjust the working path of the pull rope, and ensure that the counterweight can be restored to a precise and constant initial height before each fall, thus ensuring the reliability of the test data. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the mounting base and the present invention;

[0025] Figure 3 This is a three-dimensional cross-sectional view of the support frame in this utility model.

[0026] Legend:

[0027] 1. Support frame; 2. Sliding plate; 3. Probe rod; 4. Through hammer; 5. Counterweight; 6. Support block; 7. Pulling assembly; 71. Mounting base; 72. Motor; 73. Drum; 74. Connecting block; 75. Moving wheel; 76. Fixed wheel; 77. Pull rope; 8. Adjusting assembly; 81. Connecting rod; 82. Moving frame; 83. Rack; 84. Gear; 85. Lead screw; 9. Scale line; 10. Stabilizer. Detailed Implementation

[0028] 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.

[0029] Reference Figure 1 , Figure 2 , Figure 3This utility model provides an embodiment of a foundation bearing capacity penetration hammer, including a support frame 1 for mounting other components. A sliding plate 2 for moving a probe rod 3 is slidably connected to the inner wall of the support frame 1. The probe rod 3 is fixedly connected to the lower surface of the sliding plate 2, and a core hammer 4 is fixedly connected to the bottom end of the probe rod 3. Both the probe rod 3 and the core hammer 4 are existing structures and can be implemented by those skilled in the art; therefore, they will not be described in detail in this case. A counterweight block 5 for pressing down the probe rod 3 and the core hammer 4 is slidably connected to the outer wall of the probe rod 3. A support block 6 for supporting the counterweight block 5 is fixedly connected to the outer wall of the probe rod 3. A compensation and traction mechanism is provided on the outer wall of the support frame 1, including a mechanism for assisting in lifting the counterweight block 5. The traction assembly 7 includes a mounting base 71 for mounting other components. The mounting base 71 is fixedly connected to the top of the support frame 1, driving the counterweight 5 to rise. A motor 72 for driving the drum 73 to rotate is mounted on the outer wall of the mounting base 71. The output shaft of the motor 72 is fixedly connected to the drum 73 for winding and unwinding the pull rope 77 to control the counterweight 5. A connecting block 74 for driving the moving wheel 75 to move horizontally is slidably connected to the inner wall of the mounting base 71. The moving wheel 75 for controlling the length of the pull rope 77 is rotatably connected to the inner wall of the connecting block 74. A fixed wheel 76 for guiding the pull rope 77 to pull the counterweight 5 vertically is rotatably connected to the inner wall of the mounting base 71. The outer wall of the drum 73 is provided with a pull rope 77 for pulling the counterweight 5 to move up and down.

[0030] Reference Figure 2 and Figure 3 The compensation traction mechanism also includes an adjustment component 8. The adjustment component 8 can control the relative position of the counterweight 5 as it slides up and down when the probe 3 is inserted into the soil, ensuring that the counterweight 5 remains at a fixed sliding distance on the probe 3. The adjustment component 8 includes a connecting rod 81 for connecting the movable frame 82. The connecting rod 81 is fixedly connected to the upper surface of the sliding plate 2 and moves with the sliding plate 2. The top of the connecting rod 81 is fixedly connected to the movable frame 82, which drives the rack 83 to slide up and down. The outer wall of the movable frame 82 is fixedly connected to the rack 83 for meshing with the gear 84, and the rack 83 meshes with a screw 85 for driving the lead screw 85 to rotate. The gear 84 is movable, and the inner wall of the gear 84 is fixedly connected to the lead screw 85 for driving the connecting block 74 to move. The gear 84 is rotatably connected to the inner wall of the mounting base 71 and is supported by the mounting base 71. The lead screw 85 is rotatably connected to the inner wall of the mounting base 71 and is fixed by the mounting base 71. The moving frame 82 is hollow to allow the pull rope 77 to pass through the moving frame 82. When the pull rope 77 pulls up the counterweight 5, the friction of the gear 84, rack 83 and lead screw 85 in the adjusting assembly 8 is offset and reduced by the thrust of the pull rope 77 on the moving wheel 75, and will not affect the impact and downward pressure of the counterweight 5 on the probe 3.

[0031] Reference Figure 1 and Figure 2 One end of the pull rope 77 is fixedly connected to the outer wall of the drum 73. The drum 73 can rotate to wind up or unwind the pull rope 77. The other end of the pull rope 77 is wound around the drum 73 and passes through the moving wheel 75 and the fixed wheel 76 in sequence, and is fixedly connected to the outer wall of the counterweight 5. The movable moving wheel 75 can release the pull rope 77 of the corresponding length when the probe 3 moves down, ensuring the accuracy of the measurement. The inner wall of the support frame 1 is fixedly connected to the stabilizing frame 10 to prevent the probe 3 from shifting when it is pressed down. The outer wall of the probe 3 is provided with scale lines 9 for workers to observe and measure. The connecting block 74 is set on the outer wall of the lead screw 85. The movement of the connecting block 74 is controlled by the lead screw 85. The drum 73 is rotatably connected to the inner wall of the mounting base 71 and is supported and fixed by the mounting base 71. The moving wheel 75 is set parallel to the drum 73. The outer wall of the fixed wheel 76 is tangent to the center line of the counterweight 5, so that the counterweight 5 can be stably and vertically pulled up by the pull rope 77.

[0032] Working principle: During use, the support frame 1 is stably placed above the foundation soil to be tested. The position of the sliding plate 2 within the support frame 1 is adjusted so that the probe 3 and the mandrel 4 fixed at its bottom are aligned with the predetermined test point. At this time, the counterweight 5 falls on the support block 6, which acts as an initial limit, and then the motor 72 is started. Motor 72 drives drum 73 to rotate, starting to wind up pull rope 77. Pull rope 77 passes through moving wheel 75 and fixed wheel 76 in sequence, finally pulling counterweight 5 upward. Counterweight 5 overcomes gravity and slides upward along the outer wall of probe rod 3 until it is raised to the predetermined, standardized drop height. The position design of fixed wheel 76 ensures that the pulling force of pull rope 77 on counterweight 5 is basically perpendicular, reducing skew. When counterweight 5 reaches the predetermined height, control motor 72 instantly releases the constraint of drum 73, allowing drum 73 to rotate freely. Counterweight 5 falls freely under the action of gravity. The falling counterweight 5 impacts the support block 6 below it, instantly transferring the impact energy to probe rod 3. Probe rod 3 transmits the impact force vertically downward to the core hammer 4 at its bottom. Under the action of impact force, core hammer 4 penetrates into the foundation soil to a certain depth, thus completing one test. By observing the clearly marked scale line 9 on the outer wall of probe rod 3, the penetration depth of core hammer 4 under a single hammer blow can be accurately read.

[0033] As the starting point of the counterweight 5 decreases with the downward movement of the probe rod 3, the connecting rod 81, which is fixedly connected to the upper surface of the sliding plate 2, also moves downward synchronously. The connecting rod 81 drives the moving frame 82 to move downward together, and the rack 83 fixedly installed on the outside of the moving frame 82 moves downward accordingly. The downward movement of the rack 83 drives the gear 84 meshing with it to rotate. The rotation of the gear 84 drives the lead screw 85, which is fixedly connected to its inner wall, to rotate synchronously. The rotation of the lead screw 85 drives the connecting block 74, which is threadedly engaged with it, to move horizontally on the inner wall of the mounting base 71. The horizontal movement of the connecting block 74 causes the moving wheel 75, which is rotatably connected to it, to undergo horizontal displacement. The horizontal movement of the moving wheel 75 changes the path length of the pull rope 77 from the drum 73 through the moving wheel 75 to the fixed wheel 76. This extra length just compensates for the extension of the lifting path of the counterweight 5 caused by the downward movement of the probe rod 3, making the detection process more accurate and stable.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ground bearing capacity sounding hammer comprising a support frame (1), characterized in that: The inner wall of the support frame (1) is slidably connected to a sliding plate (2), the lower surface of the sliding plate (2) is fixedly connected to a probe rod (3), the bottom end of the probe rod (3) is fixedly connected to a through hammer (4), the outer wall of the probe rod (3) is slidably connected to a counterweight block (5), the outer wall of the probe rod (3) is fixedly connected to a support block (6), and the outer wall of the support frame (1) is provided with a compensation traction mechanism, which includes a traction component (7). The traction assembly (7) includes a mounting base (71), which is fixedly connected to the top of the support frame (1). A motor (72) is mounted on the outer wall of the mounting base (71). A drum (73) is fixedly connected to the output shaft of the motor (72). A connecting block (74) is slidably connected to the inner wall of the mounting base (71). A movable wheel (75) is rotatably connected to the inner wall of the connecting block (74). A fixed wheel (76) is rotatably connected to the inner wall of the mounting base (71). A pull rope (77) is provided on the outer wall of the drum (73).

2. A ground bearing capacity sounding hammer according to claim 1, characterized in that: The compensation traction mechanism further includes an adjustment component (8), which includes a connecting rod (81) fixedly connected to the upper surface of the sliding plate (2). A movable frame (82) is fixedly connected to the top of the connecting rod (81), and a rack (83) is fixedly connected to the outer wall of the movable frame (82). The rack (83) meshes with a gear (84), and a lead screw (85) is fixedly connected to the inner wall of the gear (84).

3. A ground bearing capacity sounding hammer as claimed in claim 1, wherein: One end of the pull rope (77) is fixedly connected to the outer wall of the drum (73), and the other end of the pull rope (77) is wound around the drum (73) and passes through the moving wheel (75) and the fixed wheel (76) in sequence, and is fixedly connected to the outer wall of the counterweight (5).

4. A ground bearing capacity sounding hammer according to claim 2, wherein: The gear (84) is rotatably connected to the inner wall of the mounting base (71), and the lead screw (85) is rotatably connected to the inner wall of the mounting base (71).

5. The ground bearing capacity sounding hammer according to claim 1, wherein: The inner wall of the support frame (1) is fixedly connected to a stabilizing frame (10), and the outer wall of the probe (3) is provided with scale lines (9).

6. The ground bearing capacity sounding hammer according to claim 1, wherein: The connecting block (74) is disposed on the outer wall of the lead screw (85), the drum (73) is rotatably connected to the inner wall of the mounting base (71), and the moving wheel (75) is disposed parallel to the drum (73).

7. A ground bearing capacity sounding hammer as claimed in claim 2, wherein: The shape of the movable frame (82) is set to hollow.

8. The ground bearing capacity sounding hammer according to claim 1, wherein: The outer wall of the fixed wheel (76) is tangent to the center line of the counterweight (5).

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