Novel pile hammer

Abstract

The utility model relates to a novel pile hammer. Comprising a pile hammer, a sheath, an upper rack, a buffer cylinder, a pressure-bearing seat and a lower rack, the sheath is arranged on the outer side of the upper portion of the pile hammer, the upper rack is arranged on the outer side of the lower portion of the pile hammer, the buffer cylinder is connected to the lower portion of the upper rack, the pressure-bearing seat is arranged on the lower portion of the buffer cylinder, the lower rack is connected to the outer side of the bottom of the buffer cylinder, and a pile sleeve is connected to the lower side of the pressure-bearing seat; the pile hammer comprises a lifting lug, a hydraulic cylinder, a piston rod and a hammer core, the lifting lug is fixedly connected to the upper portion of the hydraulic cylinder, the piston rod is arranged in the hydraulic cylinder, and the lower end of the piston rod is fixedly connected to the inner side of the upper portion of the hammer core. The piston rod controls and drives the hammer core to reciprocate up and down in the inner cavity of the upper rack through the hydraulic pipeline. Different cushion layer rigidities can be obtained by changing the height of a liquid column in the buffer cylinder, so that the optimal matching rigidities of piles in different soil layers in a pile driving hammering system are achieved, and the pile driving device is suitable for piling in different soil layers.

Description

TECHNICAL FIELD

[0001] The utility model relates to piling equipment technical field, especially a novel pile driver. BACKGROUND

[0002] At present, the hydraulic pile driver is powered by hydraulic energy, lifts the hammer body, then rapidly bleeds or simultaneously reverses the oil supply, the hammer body accelerates to descend, hits the pile cap and sinks the pile body into the soil to realize the pile sinking operation.

[0003] In general, the cushion layer of the device uses rubber pad or bakelite board as the buffer material, which can weaken the maximum impact force and reduce the pile damage. The cushion layer stiffness of a pile driver is difficult to adjust after being determined. In the foundation engineering construction, the pile driving machinery may encounter different soil layers such as ground surface soil, backfill soil, sandy soil, clay, gravel soil, boulder and rock groove, and different soil layers have different stiffness, i.e. the pile driving cannot be applied to different soil layers, and the system efficiency is low. Therefore, in order to improve the above situation, it is necessary to propose a novel pile driver to overcome the above technical problems. SUMMARY

[0004] The utility model discloses a novel pile driver to solve the technical problem of different soil layer pile driving and low system efficiency.

[0005] The technical scheme is as follows:

[0006] A novel pile driver comprises a pile driver, a sheath, an upper rack, a buffer cylinder, a pressure bearing seat and a lower rack, the upper side of the pile driver is provided with the sheath, the lower side of the pile driver is provided with the upper rack, the lower part of the upper rack is connected with the buffer cylinder, the lower part of the buffer cylinder is provided with the pressure bearing seat, the bottom outer side of the buffer cylinder is connected with the lower rack, and the lower side of the pressure bearing seat is connected with a pile sleeve.

[0007] Preferably, the upper rack comprises an upper rack body, the outer side of the inner recessed part of the upper rack body is provided with a damping pad, the upper part of the middle of the upper rack body is provided with a through hole, the piston rod enters the lower inner cavity of the upper rack from the through hole, and the inner side of the lower end of the upper rack body is provided with an internal thread.

[0008] Preferably, the buffer cylinder is an upper central opening cylinder, the lower part of the buffer cylinder is provided with a spherical base, the upper part of the buffer cylinder is provided with a three-section cylinder body, the outer side of the upper cylinder body of the buffer cylinder is provided with external threads, the outer side of the lower cylinder body of the buffer cylinder is provided with external threads, the one side of the middle cylinder body of the buffer cylinder is provided with liquid level measuring seats in the upper and lower parts respectively, and the liquid level inside the buffer cylinder is measured by installing sensors or liquid level meters; the other side of the middle cylinder body of the buffer cylinder is provided with a liquid inlet hole and a liquid outlet hole in the upper and lower parts respectively, the upper part of the inner cavity of the buffer cylinder is a straight circular cavity, the lower part is provided with a step and then smoothly transitions to the bottom flat bottom.

[0009] Preferably, the straight circular cavity of the buffer cylinder is respectively provided with a sealing body and an impact pad, the sealing body is a rigid piston body, the lower side of the sealing body is provided with a sealing groove, the sealing groove is provided with a sealing ring, the impact pad is a circular column, the outer side of the impact pad is provided with a gasket, and the gasket is arranged on the top of the upper cylinder body of the buffer cylinder.

[0010] Preferably, the outer side of the upper cylinder body of the buffer cylinder is provided with a retaining ring, the lower end of the upper rack body is connected to the outer side of the upper cylinder body of the buffer cylinder through threads, and the retaining ring is pressed to the buffer cylinder.

[0011] Preferably, the straight circular cavity of the buffer cylinder is provided with a buffer liquid.

[0012] Preferably, the buffer liquid is hydraulic oil.

[0013] Preferably, the lower rack comprises a lower rack body, the inner side of the upper part of the lower rack body is provided with internal threads, and the lower rack body is connected to the outer side of the lower cylinder body of the buffer cylinder through threads; the outer side of the lower part of the lower rack body is provided with a circular ring plate, the lower part of the lower rack body is provided with a connecting ring, and the connecting ring is fastened to the circular ring plate on the outer side of the lower part of the lower rack body through bolts.

[0014] Preferably, the pressure bearing seat comprises a pressure bearing seat body, the inner side of the upper part of the pressure bearing seat is a spherical cavity corresponding to the shape of the lower side of the buffer cylinder, the inner side of the lower part is provided with a pile sleeve cavity, the pile sleeve cavity is provided with a grommet, and the inner side of the lower part of the pile sleeve cavity is provided with internal threads.

[0015] Preferably, the pile sleeve comprises a pile sleeve shell, the lower part of the pile sleeve shell is provided with a conical ring, the outer side of the upper part of the pile sleeve shell is provided with external threads, and the grommet is pressed into the inner side of the pile sleeve cavity through thread connection.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a buffering cylinder is provided with the buffer solution of different height, and the pressure-bearing area of the buffer solution in the buffering cylinder is constant, the liquid level height of the liquid level sensor installed on the liquid level measuring seat is observed, the liquid level height is changed by adjusting the liquid amount of liquid inlet hole and the liquid amount of liquid outlet hole, and the equivalent stiffness of liquid seal under pressure can be changed. Different pad stiffness can be obtained by changing the liquid column height, so that the best matching stiffness of the pile in different soil layers in the pile hammering system is achieved, thereby being applicable to pile driving in different soil layers. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional structure diagram of the novel pile hammer of the utility model;

[0019] Figure 2 It is the front view of the novel pile hammer of the utility model;

[0020] Figure 3 It is the half sectional view of the novel pile hammer of the utility model;

[0021] Figure 4 It is the three-dimensional structure schematic diagram of the buffering cylinder of the utility model;

[0022] Figure 5 It is the full sectional view of the buffering cylinder of the utility model;

[0023] Figure 6 It is the full sectional view of the pressure-bearing seat of the utility model;

[0024] Figure 7 It is the full sectional view of the pile sleeve of the utility model;

[0025] In the drawing: 100, pile hammer; 200, sheath; 300, upper rack; 400, buffering cylinder; 500, lower rack; 600, pressure-bearing seat; 700, pile sleeve; 800, pile;

[0026] 101, lifting lug; 102, hydraulic cylinder; 103, piston rod; 104, hammer core; 301, damping pad; 302, upper rack body; 401, cylinder body; 402, liquid level measuring seat; 403, liquid inlet hole; 404, liquid outlet hole; 405, spherical base; 411, retaining ring; 412, sealing body; 413, gasket; 414, impact pad; 420, buffer solution; 501, lower rack body; 502, connecting ring; 601, pressure-bearing seat body; 602, concave spherical surface; 603, pile sleeve cavity; 604, grommet; 701, pile sleeve shell; 702, conical ring. DETAILED DESCRIPTION

[0027] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0028] As Figures 1 to 7 shown, a new pile hammer, including pile hammer 100, sheath 200, upper rack 300, buffer cylinder 400, lower rack 500 and pressure seat 600, the upper outer side of pile hammer 100 is equipped with sheath 200, the lower outer side of pile hammer 100 is equipped with upper rack 300, and the lower part of upper rack 300 is connected with buffer cylinder 400, the lower part of buffer cylinder 400 is equipped with pressure seat 600, the bottom outer side of buffer cylinder 400 is connected with lower rack 500, and the lower side of pressure seat 600 is connected with pile sleeve 700;Pile hammer 100 includes lifting lug 101, hydraulic cylinder 102, piston rod 103 and hammer core 104, lifting lug 101 is fixedly connected to the upper part of hydraulic cylinder 102, piston rod 103 is arranged in the interior of hydraulic cylinder 102, the bottom of hydraulic cylinder 102 is fixed to upper rack 300, and the lower end of piston rod 103 is fixedly connected to the inner side of the upper part of hammer core 104;Piston rod 103 can move up and down in hydraulic cylinder 102 by hydraulic pipeline control, and simultaneously drives hammer core 104 to reciprocate up and down in the inner cavity of upper rack 300.

[0029] The upper rack 300 includes an upper rack body 302, the outer side of the upper rack body 302 is provided with a damping pad 301, the upper part of the upper rack body 302 is provided with a through hole, the piston rod 103 enters the lower inner cavity of the upper rack 300 from the through hole, and the inner side of the lower end of the upper rack body 302 is provided with an internal thread.

[0030] The buffer cylinder 400 is a cylinder with a central hole in the upper part, the lower part of the buffer cylinder 400 is provided with a spherical base 405, the upper part of the buffer cylinder 400 is provided with a three-section cylinder body, the outer side of the upper cylinder body of the buffer cylinder 400 is provided with an external thread, the outer side of the lower cylinder body of the buffer cylinder 400 is provided with an external thread, one side of the middle cylinder body of the buffer cylinder 400 is provided with a liquid level measuring seat 402 upwards and downwards, respectively, and the liquid level inside the buffer cylinder 400 is measured by installing a sensor or a liquid level meter;The other side of the middle cylinder body of the buffer cylinder 400 is provided with a liquid inlet hole 403 and a liquid outlet hole 404 upwards and downwards, respectively, the upper part of the inner cavity of the buffer cylinder 400 is a straight circular cavity, the lower part is provided with a step and then smoothly transitions to the bottom flat bottom.

[0031] The straight circular cavity of the buffer cylinder 400 is respectively provided with a sealing body 412 and an impact pad 414, the sealing body 412 is a rigid piston body, the lower side of the sealing body 412 is externally provided with a sealing groove, the sealing groove is internally provided with a sealing ring, the impact pad 414 is a circular column, the outer side of the impact pad 414 is provided with a gasket 413, and the gasket 413 is arranged on the top of the upper cylinder body of the buffer cylinder 400.

[0032] The outer side of the upper cylinder body of the buffer cylinder 400 is provided with a stop ring 411, the lower end of the upper rack body 302 is threadedly connected to the outer side of the upper cylinder body of the buffer cylinder 400, and the stop ring 411 is pressed to the buffer cylinder 400.

[0033] The straight circular cavity of the buffer cylinder 400 is provided with a buffer liquid 420, and the buffer liquid 420 is preferably hydraulic oil.

[0034] The lower rack 500 comprises a lower rack body 501, the inner side of the upper portion of the lower rack body 501 is provided with an internal thread, and the lower rack body 501 is threadedly connected to the outer side of the lower cylinder body of the buffer cylinder 400; the outer side of the lower portion of the lower rack body 501 is provided with a circular ring plate, the lower portion of the lower rack body 501 is provided with a connecting ring 502, and the connecting ring 502 is fastened to the circular ring plate on the outer side of the lower portion of the lower rack body 501 by bolts.

[0035] The pressure bearing seat 600 comprises a pressure bearing seat body 601, the upper inner side of the pressure bearing seat 600 is a spherical concave cavity corresponding to the shape of the lower side of the buffer cylinder 400, the lower inner side is provided with a pile sleeve cavity 603, the pile sleeve cavity 603 is internally provided with a grommet 604, and the lower inner side of the pile sleeve cavity 603 is provided with an internal thread.

[0036] The pile sleeve 700 comprises a pile sleeve shell 701, the lower portion of the pile sleeve shell 701 is provided with a tapered ring 702, the outer side of the upper portion of the pile sleeve shell 701 is provided with an external thread, and the pile sleeve shell 701 is threadedly connected to the inner side of the pile sleeve cavity 603, so that the grommet 604 is pressed to the inner side of the pile sleeve cavity 603.

[0037] The working principle of the utility model is as follows:

[0038] The pile hammering process of the hydraulic pile hammer is essentially a stress wave generation and propagation process, the pile hammer hits the hammer pad and the pile pad, the impact force is transmitted and adjusted through the pad, and is transmitted to the pile. During pile driving, the pile hammer 100 is in the downward process, the piston rod 103 pushes the hammer core 104 to impact downward, the hammer core 104 pushes the impact pad 414 to move downward, the hammer core 104 transmits the impact force to the buffer cylinder 400 through the gasket 413, pushes the pressure seat 600 to move downward, the pressure seat 600 drives the pile sleeve 700 to impact downward on the pile 800, due to the resistance of the stratum, the pile 800 generates an upward rebound force to the pile sleeve 700, the rebound force of the pile 800 first acts on the inner cavity of the pile sleeve shell 701, then is transmitted to the pile sleeve cavity 603 of the pressure seat 600 through the gasket 604, then is transmitted to the spherical bottom 405 of the buffer cylinder 400 through the inner concave spherical surface 602 of the pressure seat 600, and then is applied to the buffer liquid 420 in the straight circular cavity of the buffer cylinder 400 through the lower spherical bottom 405 of the buffer cylinder 400, and the pressure bearing area of the buffer liquid 420 in the buffer cylinder 400 is constant, the liquid level of the liquid level sensor installed on the liquid level measuring seat 402 is observed, the liquid level height is changed by adjusting the amount of liquid entering the liquid inlet hole 403 and the amount of liquid discharged from the liquid outlet hole 404, and the liquid level height can change the equivalent stiffness of the liquid sealed pressure. That is, different pad stiffnesses can be obtained by changing the liquid column height, so that the pile 800 in the pile hammering system in different soil layers can be best matched in stiffness, so as to be suitable for pile driving in different soil layers.

[0039] The technical scheme that the spherical bottom 405 of the lower part of the buffer cylinder 400 cooperates with the inner concave spherical surface 602 on the pressure seat 600 can improve the stress area under the premise of the same diameter, so that the material damage of the buffer cylinder 400 caused by the rebound force of pile driving can be reduced.

[0040] By changing the diameter of the inner cavity of the pile sleeve shell 701, piles of different diameters can be adapted.

[0041] The above is only a preferred embodiment of the present application, and any skilled person in the art can modify the technical solutions described above or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent transformation according to the technical solutions of the present application is within the scope of protection of the present application.

Claims

1. A new type of pile hammer, characterized by: The utility model provides a pile driver, which comprises a pile driver (100), a sheath (200), an upper frame (300), a buffer cylinder (400), a lower frame (500) and a pressure bearing seat (600), the upper outer side of the pile driver (100) is provided with the sheath (200), the lower outer side of the pile driver (100) is provided with the upper frame (300), the lower end of the upper frame (300) is connected with the buffer cylinder (400), the lower end of the buffer cylinder (400) is provided with the pressure bearing seat (600), the bottom outer side of the buffer cylinder (400) is connected with the lower frame (500), and the lower side of the pressure bearing seat (600) is connected with a pile sleeve (700); the pile driver (100) comprises a lifting lug (101), a hydraulic cylinder (102), a piston rod (103) and a hammer core (104), the upper end of the hydraulic cylinder (102) is fixedly connected with the lifting lug (101), the inside of the hydraulic cylinder (102) is provided with the piston rod (103), the bottom of the hydraulic cylinder (102) is fixed to the upper frame (300), and the lower end of the piston rod (103) is fixedly connected to the inner side of the upper end of the hammer core (104).

2. A new type of pile hammer according to claim 1, characterized in that: The upper frame (300) comprises an upper frame body (302), the outer side of the upper frame body (302) is provided with a damping pad (301), the upper end of the upper frame body (302) is provided with a through hole, the piston rod (103) enters the inner cavity of the lower end of the upper frame (300) from the through hole, and the inner side of the lower end of the upper frame body (302) is provided with an internal thread.

3. A new type of pile hammer according to claim 2, characterized in that: The buffer cylinder (400) is a cylinder body with a central hole in the upper end, the lower end of the buffer cylinder (400) is provided with a spherical seat (405), the upper end of the buffer cylinder (400) is provided with three cylinder bodies, the outer side of the upper end cylinder body of the buffer cylinder (400) is provided with an external thread, the outer side of the lower end cylinder body of the buffer cylinder (400) is provided with an external thread, one side of the middle cylinder body of the buffer cylinder (400) is provided with liquid level measuring seats (402) arranged in pairs on the upper end and the lower end, respectively, and the liquid level inside the buffer cylinder (400) is measured by installing a sensor or a liquid level meter; the other side of the middle cylinder body of the buffer cylinder (400) is provided with a liquid inlet hole (403) and a liquid outlet hole (404) arranged in pairs on the upper end and the lower end, respectively, the upper end of the inner cavity of the buffer cylinder (400) is a straight circular cavity, the lower end is provided with a step and then is smoothly connected to the bottom flat bottom.

4. A new type of pile hammer according to claim 3, characterized in that: The straight circular cavity of the buffer cylinder (400) is respectively provided with a sealing body (412) and an impact pad (414), the sealing body (412) is a rigid piston body, the outer side of the lower end of the sealing body (412) is provided with a sealing groove, the sealing groove is provided with a sealing ring, the impact pad (414) is a circular column, the outer side of the impact pad (414) is provided with a gasket (413), and the gasket (413) is arranged on the top of the upper end cylinder body of the buffer cylinder (400).

5. A new type of pile hammer according to claim 4, characterized in that: The outer side of the bottom of the upper end cylinder body of the buffer cylinder (400) is provided with a retaining ring (411), the lower end of the upper frame body (302) is connected to the outer side of the upper end cylinder body of the buffer cylinder (400) through screw connection, and the retaining ring (411) is pressed to the buffer cylinder (400).

6. A new type of pile hammer according to claim 5, characterized in that: The straight circular cavity of the buffer cylinder (400) is provided with a buffer liquid (420).

7. A new type of pile hammer according to claim 6, characterized in that: The buffer (420) is hydraulic oil.

8. A new type of pile hammer according to claim 7, characterized in that: The lower rack (500) includes a lower rack body (501), the inner side upper part of the lower rack body (501) is provided with internal threads, and the lower part of the buffer cylinder (400) is connected to the outer side of the lower rack body (501) through the threads; the outer side lower part of the lower rack body (501) is provided with a circular ring plate, and the lower part of the lower rack body (501) is provided with a connecting ring (502), which is fastened to the circular ring plate of the outer side lower part of the lower rack body (501) through bolts.

9. A new type of pile hammer according to claim 1, characterized in that: The pressure bearing seat (600) includes a pressure bearing seat body (601), the upper inner side of the pressure bearing seat (600) is a spherical cavity corresponding to the shape of the lower side of the buffer cylinder (400), and the lower inner side is provided with a pile sleeve cavity (603), the pile sleeve cavity (603) is provided with a grommet (604) inside, and the lower inner side of the pile sleeve cavity (603) is provided with internal threads.

10. A new type of pile hammer according to claim 9, characterized in that: The pile sleeve (700) includes a pile sleeve shell (701), the lower part of the pile sleeve shell (701) is provided with a tapered ring (702), and the outer side upper part of the pile sleeve shell (701) is provided with external threads, which are connected to the inner side of the pile sleeve cavity (603) through threads, and the grommet (604) is pressed tightly into the pile sleeve cavity (603).

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