Anti-springback protection device of standard penetration test hammer

Abstract

The utility model belongs to the field of dynamic sounding, and particularly relates to an anti-rebound protection device of a standard penetration test hammer, which comprises a sounding support, a buffer port is arranged on one side of the sounding support, a buffer support is slidably mounted on the inner side of the buffer port, and a buffer mechanism is arranged on the buffer support. A guide hole is formed in one side of the buffer support, a penetration hammer is slidably mounted on the inner side of the guide hole, an annular protrusion is arranged on the outer side of the penetration hammer, a penetration device is arranged at the bottom of the penetration hammer, a locking shell is fixedly mounted at the top of the penetration device, and a locking mechanism is arranged on the inner side of the locking shell. According to the utility model, when the injection hammer hits the injection device, the injection hammer can be clamped, the danger caused by overhigh rebound height of the injection hammer can be prevented, and through the arranged buffer mechanism, the rebound force of the injection hammer can be effectively buffered, the rebound of the injection hammer is further prevented, and the safety of equipment is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to power sounding technical field especially relates to a standard penetration test hammer's anti -rebound protection device. BACKGROUND

[0002] Standard penetration test is a kind of power sounding, it is a kind of method for determining the bearing capacity of sand or cohesive soil foundation in situ, this method has been included in Chinese state "industrial and civil building foundation design specification".It uses certain hammering function, and the split-tube penetrator of certain specification is hit into the soil in the bottom of borehole, and according to the penetration resistance in the soil, the change of soil layer and the engineering properties of soil are judged;

[0003] When carrying out penetration experiment, due to the inertia of rebound caused by the falling of penetration hammer, the anti-rebound protection mechanism is usually provided, however, the existing anti-rebound protection mechanism is usually buffered by spring, when the weight and inertia of penetration hammer are large, the spring cannot effectively buffer the rebound impact force, and there is great safety hazard;

[0004] Therefore, we propose a standard penetration test hammer's anti-rebound protection device to solve the above problems. CONTENT OF UTILITY MODEL

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of standard penetration test hammer's anti-rebound protection device, including sounding support, the one side of sounding support is equipped with buffer mouth, the inside of buffer mouth is slidably installed with buffer support, and buffer mechanism is equipped on the buffer support;The one side of buffer support is equipped with guide hole, the inside of guide hole is slidably installed with penetration hammer, the outside of penetration hammer is equipped with annular protrusion, the bottom of penetration hammer is equipped with penetrator, the top of penetrator is fixedly installed with locking shell, and the inside of locking shell is equipped with locking mechanism.

[0007] Specifically, the buffer mechanism includes a buffer sleeve, a sliding sleeve and a piston rod, the top of the buffer support is fixedly installed with the sliding sleeve, the outside of the sliding sleeve is slidably sleeved with the buffer sleeve, the top inner wall of the buffer sleeve is fixedly installed with the piston rod, and the piston on the piston rod is slidably installed on the inside of the sliding sleeve.

[0008] Specifically, the inside of the sliding sleeve is filled with buffer oil, which facilitates to enhance the buffering effect.

[0009] Specifically, the top of the buffer sleeve is fixedly installed with a damper, the top of the damper is fixedly connected with the top inner wall of the buffer mouth, the outside of the buffer sleeve is sleeved with a buffer spring, and the other end of the buffer spring is fixedly connected with the bottom of the damper.

[0010] Specific, the locking mechanism includes four fixed shafts, four clamps and a disc, the top of the locking shell is provided with a sliding groove, the inner side of the sliding groove is slidably installed with a disc, the outer side of the locking shell is provided with four turnover grooves, the four turnover grooves are all communicated with the same sliding groove, the inner side of the four turnover grooves is all fixedly installed with a fixed shaft, the four fixed shafts are all rotatably provided with a clamp, the outer side of the disc is provided with an annular groove, one end of the four clamps is all slidably installed in the same annular groove, the bottom inner wall of the sliding groove is fixedly installed with a return spring, the other end of the return spring is fixedly connected with the bottom of the disc.

[0011] Specific, the outer side of the penetration hammer is provided with four locking grooves, the other end of the four clamps is respectively matched with the corresponding locking groove, so as to facilitate the locking of the penetration hammer.

[0012] Specific, the top of the disc is fixedly installed with a pressure head, the top of the pressure head is fixedly installed with a rubber buffer head, the rubber buffer head is in contact with the penetration hammer, so as to prevent the penetration hammer from damaging the pressure head.

[0013] Specific, the top of the penetrator is fixedly installed with a guide rod, the guide rod slidably penetrates the probe support, the locking shell, the disc, the pressure head and the rubber buffer head, the penetration hammer is slidably provided on the guide rod, so as to guide the moving track of the penetration hammer.

[0014] Compared with the prior art, the beneficial effects of the utility model lie in that: through the locking mechanism, the penetration hammer can be clamped when it is hit on the penetrator, so as to prevent the rebound height from being too high and dangerous, and through the buffer mechanism, the rebound force of the penetration hammer can be effectively buffered, so as to further prevent the rebound and increase the safety of the equipment. ACCURACY OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the anti-rebound protection device of the standard penetration test hammer;

[0016] Figure 2 It is a three-dimensional structure sectional view schematic diagram of the anti-rebound protection device of the standard penetration test hammer;

[0017] Figure 3 It is a three-dimensional structure sectional view schematic diagram of the buffer mechanism of the anti-rebound protection device of the standard penetration test hammer;

[0018] Figure 4 It is a three-dimensional structure schematic diagram of the locking mechanism of the anti-rebound protection device of the standard penetration test hammer;

[0019] Figure 5The utility model provides a kind of standard penetration test hammer's anti-rebound protection device's locking mechanism's three-dimensional structure split schematic view.

[0020] In the drawing: 1, probe support; 2, buffer support; 3, penetration hammer; 4, buffer sleeve; 5, sliding sleeve; 6, piston rod; 7, damper; 8, buffer spring; 9, guide rod; 10, penetrator; 11, locking slot; 12, locking shell; 13, fixed shaft; 14, clamp; 15, disc; 16, return spring; 17, pressure head; 18, rubber buffer head. DETAILED DESCRIPTION

[0021] REFERENCE Figures 1-5 A kind of standard penetration test hammer's anti-rebound protection device, including probe support 1, the side of probe support 1 is equipped with buffer mouth, the inside of buffer mouth is slidably installed with buffer support 2, and buffer support 2 is equipped with buffer mechanism;Buffer support 2 is equipped with guide hole on one side, and the inside of guide hole is slidably installed with penetration hammer 3, and the outside of penetration hammer 3 is equipped with annular protrusion, and the bottom of penetration hammer 3 is equipped with penetrator 10, and the top of penetrator 10 is fixedly installed with locking shell 12, and the inside of locking shell 12 is equipped with locking mechanism.

[0022] In the embodiment, buffer mechanism includes buffer sleeve 4, sliding sleeve 5 and piston rod 6, and the top of buffer support 2 is fixedly installed with sliding sleeve 5, and the outside of sliding sleeve 5 is slidably sleeved with buffer sleeve 4, and the top inner wall of buffer sleeve 4 is fixedly installed with piston rod 6, and the piston on piston rod 6 is slidably installed in the inside of sliding sleeve 5.

[0023] In the embodiment, the inside of sliding sleeve 5 is filled with buffer oil, to facilitate the enhancement of buffer effect.

[0024] In the embodiment, the top of buffer sleeve 4 is fixedly installed with damper 7, and the top of damper 7 is fixedly connected with the top inner wall of buffer mouth, and the outside of buffer sleeve 4 is sleeved with buffer spring 8, and the other end of buffer spring 8 is fixedly connected with the bottom of damper 7.

[0025] In the embodiment, locking mechanism includes four fixed shafts 13, four clamps 14 and disc 15, the top of locking shell 12 is equipped with sliding slot, and the inside of sliding slot is slidably installed with disc 15, and the outside of locking shell 12 is equipped with four turnover slots, and the four turnover slots are all communicated with same sliding slot, and the inside of four turnover slots is all fixedly installed with fixed shaft 13, and the four fixed shafts 13 are all rotatably sleeved with clamp 14, and the outside of disc 15 is equipped with annular groove, and one end of four clamps 14 is slidably installed in same annular groove, and the bottom inner wall of sliding slot is fixedly installed with return spring 16, and the other end of return spring 16 is fixedly connected with the bottom of disc 15.

[0026] In the embodiment, four locking grooves 11 are formed on the outer side of the penetration hammer 3, and the other ends of the four clamps 14 are matched with the corresponding locking grooves 11, so that the penetration hammer 3 is locked.

[0027] In the embodiment, the pressure head 17 is fixedly installed on the top of the disc 15, the rubber buffer head 18 is fixedly installed on the top of the pressure head 17, and the rubber buffer head 18 is in contact with the penetration hammer 3, so that the penetration hammer 3 is prevented from damaging the pressure head 17.

[0028] In the embodiment, the guide rod 9 is fixedly installed on the top of the penetrator 10, and the guide rod 9 slidably penetrates through the probe support 1, the locking shell 12, the disc 15, the pressure head 17 and the rubber buffer head 18, and the penetration hammer 3 is slidably sleeved on the guide rod 9, so that the movement track of the penetration hammer 3 is guided.

[0029] Working principle: when the standard penetration test is performed, the staff erects the probe support 1, installs the penetrator 10 and the guide rod 9 at the specified position, lifts the penetration hammer 3, and the penetration hammer 3 impacts the locking shell 12, the locking shell 12 transmits the impact force to the penetrator 10, the penetrator 10 penetrates into the soil, and the penetration hammer 3 impacts the rubber buffer head 18 when falling on the locking shell 12, the rubber buffer head 18 moves downward to drive the pressure head 17 to move downward, the pressure head 17 moves downward to drive the disc 15 to move downward, the disc 15 moves downward to drive the outer annular groove to move, thereby driving one end of the four clamps 14 to move, the four clamps 14 are rotatably sleeved on the corresponding fixed shaft 13, so that the four clamps 14 are flipped around the corresponding fixed shaft 13 as the center, the four clamps 14 are flipped into the corresponding locking grooves 11 on the surface of the penetration hammer 3, and the locking is completed; when unlocking, the staff only needs to bend the clamps 14 to reset the disc 15, the annular protrusions on the outer side of the penetration hammer 3 are in contact with the buffer support 2 when the penetration hammer 3 rebounds, the buffer support 2 moves upward to drive the sliding sleeve 5 to move upward, the sliding sleeve 5 is filled with buffer oil, the piston in the sliding sleeve 5 slides, the piston is uniformly distributed with small holes, the oil flows from one side of the piston to the other side through the small holes, a resistance is generated to hinder the movement of the piston, the rebound impact force of the penetration hammer 3 is effectively weakened, and the penetration hammer 3 is more stable.

[0030] The technical progress obtained by the utility model relative to the prior art is that the penetration hammer 3 can be clamped when falling on the penetrator 10, the rebound height of the penetration hammer 3 is prevented from being too high and being dangerous, the rebound force of the penetration hammer 3 can be effectively buffered through the buffer mechanism, the rebound of the penetration hammer 3 is further prevented, and the safety of the equipment is improved.

Claims

1. A rebound protection device for a standard penetration test hammer, characterized in that, The utility model provides a kind of probe support (1), one side of the probe support (1) is equipped with buffer mouth, the inside of the buffer mouth is slidably installed with buffer support (2), and the buffer support (2) is equipped with buffer mechanism; One side of the buffer support (2) is equipped with guide hole, the inside of the guide hole is slidably installed with driving pile (3), the outside of the driving pile (3) is equipped with annular protrusion, the bottom of the driving pile (3) is equipped with driving device (10), the top of the driving device (10) is fixedly installed with locking shell (12), the inside of the locking shell (12) is equipped with locking mechanism.

2. A rebound protection device for a standard penetration test hammer as defined in claim 1, characterized in that The buffer mechanism includes buffer sleeve (4), sliding sleeve (5) and piston rod (6), the top of the buffer support (2) is fixedly installed with sliding sleeve (5), the outside of the sliding sleeve (5) is slidably sleeved with buffer sleeve (4), the top inner wall of the buffer sleeve (4) is fixedly installed with piston rod (6), and the piston on the piston rod (6) is slidably installed on the inside of the sliding sleeve (5).

3. A protection against rebounding device for a standard penetration test hammer according to claim 2, characterized in that The inside of the sliding sleeve (5) is filled with buffer oil.

4. A protection against rebounding device for a standard penetration test hammer according to claim 3, characterized in that The top of the buffer sleeve (4) is fixedly installed with damper (7), the top of the damper (7) is fixedly connected with the top inner wall of buffer mouth, the outside of the buffer sleeve (4) is sleeved with buffer spring (8), and the other end of the buffer spring (8) is fixedly connected with the bottom of the damper (7).

5. A protection device against rebound of a standard penetration test hammer according to claim 1, characterized in that The locking mechanism includes four fixed shafts (13), four clamps (14) and disc (15), the top of the locking shell (12) is equipped with sliding groove, the inside of the sliding groove is slidably installed with disc (15), the outside of the locking shell (12) is equipped with four turnover grooves, four turnover grooves are communicated with same sliding groove, the inside of four turnover grooves is fixedly installed with fixed shaft (13), four fixed shafts (13) are rotatably sleeved with clamp (14), the outside of the disc (15) is equipped with annular groove, one end of four clamps (14) is slidably installed in same annular groove, the bottom inner wall of the sliding groove is fixedly installed with return spring (16), and the other end of the return spring (16) is fixedly connected with the bottom of the disc (15).

6. A protection against rebounding device for a standard penetration test hammer according to claim 5, characterized in that The outside of the driving pile (3) is equipped with four locking grooves (11), and the other end of the four clamps (14) is respectively matched with corresponding locking groove (11).

7. A protection against rebounding device for a standard penetration test hammer according to claim 6, characterized in that The top of the disc (15) is fixedly installed with pressure head (17), the top of the pressure head (17) is fixedly installed with rubber buffer head (18), and the rubber buffer head (18) is in contact with the driving pile (3).

8. A protection against rebounding device for a standard penetration test hammer according to claim 7, characterized in that The top of the driving device (10) is fixedly installed with guide rod (9), the guide rod (9) is slidably penetrated through the probe support (1), the locking shell (12), the disc (15), the pressure head (17) and the rubber buffer head (18), and the driving pile (3) is slidably sleeved on the guide rod (9).

Images