CN212582669U

CN212582669U - Hydraulic hammer

Info

Publication number: CN212582669U
Application number: CN202021129257.4U
Authority: CN
Inventors: 陈育聪; 郭宝珠; 黄梦洁; 黄昭全; 黄昭新
Original assignee: Fujian Haiwei Hydraulic Machinery Co ltd
Current assignee: Fujian Haiwei Hydraulic Machinery Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-02-23
Anticipated expiration: 2030-06-17

Abstract

The utility model relates to a hydraulic hammer, including hammer carrier, tup and the lifting cylinder who is used for lifting the tup, the hammer carrier is frame construction, the tup along the axial setting of sliding of hammer carrier, lifting cylinder is including being fixed in the cylinder body of hammer carrier, be equipped with the piston rod in the cavity of cylinder body, the one end of piston rod with tup fixed connection, the piston of piston rod divide into upper inner chamber and lower inner chamber with the cavity, the cylinder body is equipped with the oil pipe that communicates in upper inner chamber; the cylinder body is sleeved with a sleeve, the upper end and the lower end of the sleeve are closed, and an annular outer cavity is formed between the inner peripheral surface of the sleeve and the outer peripheral surface of the cylinder body; the upper part of the sleeve is provided with an oil inlet pipe communicated to the outer cavity, a passage is communicated between the oil inlet pipe and the oil outlet pipe and provided with a switch valve, and the lower part of the cylinder body is provided with a plurality of oil holes for communicating the lower inner cavity and the outer cavity; the utility model discloses have the effect that makes the even injection of hydraulic oil to improve the response speed of piston.

Description

Hydraulic hammer

Technical Field

The utility model belongs to the technical field of hydraulic machine's technique and specifically relates to a hydraulic hammer is related to.

Background

The hydraulic hammer belongs to an impact pile hammer and can be divided into a single-acting type and a double-acting type according to the structure and the working principle. The single-acting type means that the impact hammer core is lifted to a preset height through a hydraulic device and then is released quickly, and the impact hammer core strikes a pile body in a free-falling mode; the double-acting type means that after the impact hammer core is lifted to a preset height through a hydraulic device, acceleration energy is obtained from a hydraulic system to increase impact speed so as to strike a pile body. The single-action hydraulic pile hammer is corresponding to a heavy hammer light driving theory, is characterized by larger weight of the hammer core, lower impact speed and longer hammering action time, has large penetration per driving of the pile hammer, is suitable for pile types of various shapes and materials, has low pile damage rate and is particularly suitable for driving concrete pipe piles. The double-acting hydraulic pile hammer corresponds to a light hammer heavy-driving theory, is characterized by smaller weight of a hammer core, higher impact speed and shorter pile-hammering action time, has large impact energy and is most suitable for driving steel piles.

Chinese patent with publication number CN108005970A discloses an integrated hydraulic means of hydraulic hammer, including operating device and hydraulic tank, operating device one side is located to hydraulic tank, operating device includes the hydraulic pressure pipe, the inside lift chamber that is equipped with of hydraulic pressure pipe, lift chamber top is equipped with descending chamber and bottom and is equipped with the chamber that rises, be equipped with buffer gear on the hydraulic pressure intraductal wall, buffer gear includes first spring, first spring top all is equipped with first buffer board with the bottom, the intraduct portion of hydraulic pressure is equipped with the slider, the slider bottom is equipped with the connecting rod, the connecting rod outside is cup jointed and is equipped with the second spring, second spring top all is equipped with the second buffer board with the bottom, the connecting rod bottom is equipped with the tup.

The hydraulic oil in the oil inlet connecting pipe enters the ascending cavity through the second oil inlet and then generates an upward thrust to the sliding block so as to push the sliding block up, so that the hammer head is lifted, but the hydraulic oil injected into the single second oil inlet is not uniform enough, and the sliding block is difficult to move upwards quickly, namely the response speed of the sliding block is slow.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydraulic hammer, it has the effect that makes the even injection of hydraulic oil to improve the response speed of piston.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a hydraulic hammer comprises a hammer frame, a hammer head and a lifting oil cylinder for lifting the hammer head, wherein the hammer frame is of a frame structure, the hammer head is arranged in a sliding mode along the axial direction of the hammer frame, the lifting oil cylinder comprises a cylinder body fixed on the hammer frame, a piston rod is arranged in a cavity of the cylinder body, one end of the piston rod is fixedly connected with the hammer head, the cavity is divided into an upper inner cavity and a lower inner cavity by the piston of the piston rod, and an oil outlet pipe communicated with the upper inner cavity is arranged in the cylinder body; the cylinder body is sleeved with a sleeve, the upper end and the lower end of the sleeve are closed, and an annular outer cavity is formed between the inner peripheral surface of the sleeve and the outer peripheral surface of the cylinder body; the upper part of the sleeve is provided with an oil inlet pipe communicated to the outer cavity, a passage is communicated between the oil inlet pipe and the oil outlet pipe and provided with a switch valve, and the lower part of the cylinder body is provided with a plurality of oil holes communicated between the lower inner cavity and the outer cavity.

By adopting the technical scheme, when the hammer is lifted, the switch valve is closed, the passage is closed, the oil inlet pipe injects hydraulic oil into the outer cavity, the hydraulic oil in the outer cavity is uniformly injected into the lower inner cavity through the oil holes, the upper inner cavity returns oil through the oil outlet pipe, so that the piston rod is driven to ascend, the hammer head is further lifted, when the hammer is dropped, the switch valve is opened, the passage is opened, the oil outlet pipe stops returning oil, the oil inlet pipe continues feeding oil, the hydraulic oil injected by the oil inlet pipe and the oil returned by the lower inner cavity enter the upper inner cavity through the passage, so that the piston rod is driven to descend, the hammer head falls to hammer the pile body, and the process; by arranging the outer cavity and the oil holes, hydraulic oil fills the outer cavity firstly, then upward pressure is uniformly applied to the piston through the oil holes, the flow rate is large, the injection of the hydraulic oil is rapid and uniform, and the response speed of the piston in the lifting process can be accelerated; the hydraulic oil in the outer cavity forms an annular buffer area positioned on the periphery of the cylinder body, so that the impact force borne by the cylinder body can be reduced, and the service life of the cylinder body is prolonged; and through setting up the openable route, utilize the oil return of lower inner chamber as the oil that upper inner chamber advances, can effectively reduce the condition that the oil pressure vary voltage of upper inner chamber is too big and produces the oil circuit unstability, and then guaranteed the response speed when the hammer falls.

The present invention may be further configured in a preferred embodiment as: the oil holes are evenly distributed along the circumferential direction of the cylinder body.

By adopting the technical scheme, the hydraulic oil can be injected into the lower inner cavity more uniformly and quickly, so that the response speed is greatly accelerated.

The present invention may be further configured in a preferred embodiment as: the upper end of the oil cylinder is sealed with an upper cover, the oil outlet pipe is connected with the upper cover, a connecting piece sleeved at the upper end of the sleeve is fixed at the lower part of the upper cover, the connecting piece is fixedly connected with the upper end of the sleeve, the inner side area of the connecting piece is communicated with the outer cavity, and the oil inlet pipe is connected with the connecting piece.

By adopting the technical scheme, the upper cover and the connecting piece play a role in respectively sealing the upper ends of the oil cylinder and the sleeve, and the connecting piece can be used for connecting the oil inlet pipe so as to be convenient for communicating the oil inlet pipe with the outer cavity; through setting up the connecting piece, play the effect of connecting the carrier, improve into the oil pipe and be connected the steadiness with the exocoel intercommunication.

The present invention may be further configured in a preferred embodiment as: the lowest point of the sleeve is lower than that of the oil cylinder.

By adopting the technical scheme, the axial length of the outer cavity is ensured to be longer than that of the cavity of the cylinder body, so that the hydraulic oil buffering area in the outer cavity is ensured to completely wrap the cylinder body, the impact force applied to the cylinder body can be further reduced, and the service life of the cylinder body is effectively prolonged.

The present invention may be further configured in a preferred embodiment as: the upper part of the outer cavity is communicated with a first energy accumulator, and the lower part of the outer cavity is communicated with a second energy accumulator.

By adopting the technical scheme, the second energy accumulator is beneficial to stabilizing oil pressure, absorbing high-pressure pulsation and ensuring normal and stable work of a hydraulic system; the first accumulator plays the roles of stabilizing oil pressure and protecting.

The present invention may be further configured in a preferred embodiment as: hammer carrier is fixed with two edges the fixed plate that the sleeve symmetry set up, two connecting plates of fixedly connected with between two fixed plates, two the connecting plate is followed the sleeve symmetry sets up, the top position at the middle part of connecting plate is fixed with the fixing base, the sunken shaping of fixing base upper surface has half slot one, the fixing base upper surface can be dismantled and be fixed with the latch fitting, the sunken shaping of lateral wall of latch fitting has half slot two, half slot one with the synthetic circular slot of half slot two, telescopic periphery wall protrusion has and inserts and is fixed in fixed circle piece in the circular slot.

By adopting the technical scheme, the sleeve can be fixed on the hammer frame, and the cylinder body and the hammer frame are fixedly arranged through the fixation between the sleeve and the cylinder body; and through the cooperation between latch fitting and the fixing base, the telescopic installation of being convenient for is fixed.

The present invention may be further configured in a preferred embodiment as: the circular groove is internally provided with a buffering circular ring which is sleeved on the fixed circular block.

Adopt above-mentioned technical scheme, the buffering ring can adopt elastic shock attenuation material, can reduce the impact force to telescopic influence to can fix through the dismantlement between latch fitting and the fixing base, be convenient for dismantle of buffering ring and replace.

The present invention may be further configured in a preferred embodiment as: two vertical rib plates and a horizontal rib plate are fixed on the outer side surface of the connecting plate, the vertical rib plates and the horizontal rib plate are combined to form an H-shaped reinforcing rib, and the upper part of the H-shaped reinforcing rib is connected with the fixed seat; a first rib plate is fixedly connected between one side face of the horizontal rib plate and the outer side face of the fixing seat, and a second rib plate is fixedly connected between the other side face of the horizontal rib plate and the outer side face of the connecting plate.

By adopting the technical scheme, the H-shaped reinforcing ribs are used for reinforcing the fixed seat so as to improve the bearing capacity of the fixed seat and improve the installation stability of the sleeve and the lifting oil cylinder; and the first ribbed plate and the second ribbed plate strengthen the bearing capacity of the fixing frame on the basis of the H-shaped reinforcing rib, so that the installation stability of the sleeve and the lifting oil cylinder is further improved.

To sum up, the utility model discloses a following at least one useful technological effect:

1. by arranging the outer cavity and the oil holes, hydraulic oil fills the outer cavity firstly, then upward pressure is uniformly applied to the piston through the oil holes, the flow rate is large, the injection of the hydraulic oil is rapid and uniform, and the response speed of the piston in the lifting process can be accelerated; the hydraulic oil in the outer cavity forms an annular buffer area positioned on the periphery of the cylinder body, so that the impact force borne by the cylinder body can be reduced, and the service life of the cylinder body is prolonged;

2. through the cooperation between latch fitting and the fixing base, the telescopic installation of being convenient for is fixed to through set up the buffering ring in the circular slot, can reduce the impact force and to telescopic influence.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic diagram of an oil-in state of the lift cylinder in the embodiment;

FIG. 3 is a schematic diagram of the lift cylinder in the present embodiment;

fig. 4 is a schematic diagram for showing the connection relationship between the sleeve and the hammer frame according to the embodiment.

In the figure, 1, a hammer frame; 2. a hammer head; 3. lifting the oil cylinder; 4. a sleeve; 10. an on-off valve; 20. a passage; 31. a cylinder body; 32. a piston rod; 33. an upper cover; 331. an upper through hole; 34. a lower end cover; 341. a lower through hole; 35. an upper inner cavity; 36. a lower inner cavity; 37. a second accumulator; 41. an outer cavity; 42. a connecting member; 43. an oil hole; 44. an oil inlet pipe; 45. an oil outlet pipe; 51. a fixing plate; 52. a connecting plate; 53. a fixed seat; 54. a first semicircular groove; 55. a lock; 56. a second semicircular groove; 57. fixing the round block; 58. a buffer ring; 61. a vertical rib plate; 62. a horizontal rib plate; 63. a first rib plate; 64. a second rib.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a hydraulic hammer, including hammer carrier 1, tup 2 and the lift cylinder 3 that is used for lifting tup 2, hammer carrier 1 is frame construction, and the setting is slided along hammer carrier 1 axial to tup 2, and lift cylinder 3 sets up with hammer carrier 1 is fixed.

As shown in fig. 2 and 3, the lifting cylinder 3 includes a cylinder 31, the cylinder 31 is fixed to the hammer frame 1, a piston rod 32 is disposed in a chamber of the cylinder 31, a piston of the piston rod 32 divides the chamber into an upper inner cavity 35 and a lower inner cavity 36, and a lower end of the piston rod 32 is fixedly connected to the hammer head 2 (see fig. 1) to lift the hammer head 2; the upper end of the oil cylinder is sealed with an upper cover 33, the upper cover 33 is provided with an upper through hole 331 for the upper part of the piston rod 32 to pass through, the upper part of the piston rod 32 is connected with the upper through hole 331 in a sealing and sliding way, and the upper cover 33 is connected with an oil outlet pipe 45 communicated with the upper inner cavity 35; the lower end of the oil cylinder is fixedly sealed with a lower end cover 34, the lower end cover 34 is provided with a lower through hole 341 for the lower part of the piston rod 32 to pass through, and the lower part of the piston rod 32 is connected with the lower through hole 341 in a sealing sliding manner.

As shown in fig. 2 and 3, the cylinder 31 is sleeved with a sleeve 4, the sleeve 4 is fixedly arranged with the hammer frame 1, and the lowest point of the sleeve 4 is lower than the lowest point of the cylinder 31; an annular outer cavity 41 is formed between the inner circumferential surface of the sleeve 4 and the outer circumferential surface of the cylinder 31, a plurality of oil holes 43 for communicating the lower inner cavity 36 and the outer cavity 41 are formed in the lower part of the cylinder 31, and the oil holes 43 are uniformly distributed along the circumferential direction of the cylinder 31; a connecting piece 42 is fixed at the lower part of the upper cover 33, the connecting piece 42 closes the upper end of the sleeve 4, the connecting piece 42 is connected with the upper end flange of the sleeve 4, the inner side area of the connecting piece 42 is communicated with the outer cavity 41, the connecting piece 42 is connected with an oil inlet pipe 44, the oil inlet pipe 44 is communicated with the outer cavity 41, the connecting piece 42 is provided with a passage 20 and a switch valve 10 for opening and closing the passage 20, and two ends of the passage 20 are respectively communicated with the oil inlet pipe 44 and the oil outlet pipe 45; the lower end cap 34 simultaneously closes the lower end of the sleeve 4, which is flanged to the lower end of the sleeve 4.

When the hammer is lifted, the switch valve 10 is closed, the passage 20 is closed, the oil inlet pipe 44 injects hydraulic oil (see fig. 2) into the outer cavity 41, the hydraulic oil in the outer cavity 41 is uniformly injected into the lower inner cavity 36 through the oil hole 43, and the hydraulic oil in the upper inner cavity 35 returns through the oil outlet pipe 45, so that the piston rod 32 is driven to ascend, and the hammer head 2 is lifted; when the hammer falls, as shown in fig. 3, the switch valve 10 is opened, the passage 20 is opened, the oil outlet pipe 45 stops returning oil, the oil inlet pipe 44 continues to feed oil, hydraulic oil injected from the oil inlet pipe 44 and oil returned from the lower inner cavity 36 both enter the upper inner cavity 35 through the passage 20, so that the piston rod 32 is driven to descend, the hammer head 2 falls to hammer the pile body, and the process is repeated so as to complete piling; through setting up exocoel 41 and a plurality of oilhole 43, exocoel 41 is filled with earlier to hydraulic oil, then through a plurality of oilholes 43, evenly for the piston exerts ascending pressure, the throughput is great, the injection of hydraulic oil is quick and even to can accelerate the response speed that piston rod 32 rises.

Meanwhile, as shown in fig. 1, the upper part of the outer cavity 41 is communicated with a first energy accumulator (not shown in the figure), the lower part of the outer cavity 41 is communicated with a second energy accumulator 37, and both the first energy accumulator and the second energy accumulator 37 are fixedly connected with the hammer frame 1; the second accumulator 37 is beneficial to stabilizing oil pressure, absorbing high-pressure pulsation and ensuring normal and stable work of the hydraulic system; the first accumulator plays the roles of stabilizing oil pressure and protecting.

In order to ensure the installation stability between the sleeve 4 and the hammer frame 1 and reduce the impact force transmitted from the hammer frame 1 to the sleeve 4, as shown in fig. 4, the hammer frame 1 is fixed with two fixing plates 51 symmetrically arranged along the sleeve 4, two connecting plates 52 are fixedly connected between the two fixing plates 51, the two connecting plates 52 are symmetrically arranged along the sleeve 4, a fixing seat 53 is integrally formed at the upper part of the middle part of the connecting plate 52, and the fixing seat 53 protrudes out of the side surface of the connecting plate 52; a first semicircular groove 54 is concavely formed in the upper surface of the fixing seat 53, a locking piece 55 is arranged on the upper surface of the fixing seat 53, the locking piece 55 is connected with the fixing seat 53 through a bolt, a second semicircular groove 56 is concavely formed in the side wall of the locking piece 55, the first semicircular groove 54 and the second semicircular groove 56 are combined to form a circular groove, two symmetrically-arranged fixing circular blocks 57 are convexly formed on the outer peripheral surface of the sleeve 4, and the two fixing circular blocks 57 are respectively spliced and fixed with the circular groove on one side, so that the sleeve 4 and the hammer frame 1 are installed and fixed; and be equipped with the buffering ring 58 that the cover was located on fixed circle piece 57 in the circular slot, buffering ring 58 is the elastic buffer material, like the rubber material, can reduce the influence of impact force to sleeve 4.

Meanwhile, two vertical rib plates 61 and one horizontal rib plate 62 are fixed on the outer side surface of the connecting plate 52, the vertical rib plates 61 and the horizontal rib plates 62 are combined to form an H-shaped reinforcing rib, and the upper parts of the vertical rib plates 61 are connected with the outer side surface of the fixed seat 53; a first ribbed plate 63 is fixedly connected between one side surface of the horizontal ribbed plate 62 and the outer side surface of the fixed seat 53, and a second ribbed plate 64 is fixedly connected between the other side surface of the horizontal ribbed plate 62 and the outer side surface of the connecting plate 52; through above-mentioned additional strengthening, can improve the bearing capacity of fixing base 53 to improve the installation stability of sleeve 4 and lift cylinder 3.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a hydraulic hammer, includes hammer carrier (1), tup (2) and is used for lifting lift cylinder (3) of tup (2), hammer carrier (1) is frame construction, tup (2) are followed hammer carrier (1) axial slides and sets up its characterized in that: the lifting oil cylinder (3) comprises a cylinder body (31) fixed on the hammer frame (1), a piston rod (32) is arranged in a cavity of the cylinder body (31), one end of the piston rod (32) is fixedly connected with the hammer head (2), the cavity is divided into an upper inner cavity (35) and a lower inner cavity (36) by a piston of the piston rod (32), and an oil outlet pipe (45) communicated with the upper inner cavity (35) is arranged on the cylinder body (31); the cylinder body (31) is sleeved with a sleeve (4), the upper end and the lower end of the sleeve (4) are closed, and an annular outer cavity (41) is formed between the inner circumferential surface of the sleeve (4) and the outer circumferential surface of the cylinder body (31); an oil inlet pipe (44) communicated to the outer cavity (41) is arranged at the upper part of the sleeve (4), a passage (20) is communicated between the oil inlet pipe (44) and the oil outlet pipe (45), the passage (20) is provided with a switch valve (10), and a plurality of oil holes (43) used for communicating the lower inner cavity (36) and the outer cavity (41) are formed in the lower part of the cylinder body (31).

2. The hydraulic hammer of claim 1, wherein: the oil holes (43) are uniformly distributed along the circumferential direction of the cylinder block (31).

3. The hydraulic hammer of claim 1, wherein: the upper end of the oil cylinder is sealed by an upper cover (33), the oil outlet pipe (45) is connected with the upper cover (33), a connecting piece (42) which is sleeved on the upper end of the sleeve (4) is fixed on the lower portion of the upper cover (33), the connecting piece (42) is fixedly connected with the upper end of the sleeve (4), the inner side area of the connecting piece (42) is communicated with the outer cavity (41), and the oil inlet pipe (44) is connected with the connecting piece (42).

4. A hydraulic hammer according to claim 3, wherein: the lowest point of the sleeve (4) is lower than that of the cylinder body (31).

5. The hydraulic hammer of claim 1, wherein: the upper part of the outer cavity (41) is communicated with a first energy accumulator, and the lower part of the outer cavity (41) is communicated with a second energy accumulator (37).

6. The hydraulic hammer of claim 1, wherein: hammer carrier (1) is fixed with two edges fixed plate (51) that sleeve (4) symmetry set up, two connecting plate (52) of fixedly connected with between two fixed plate (51), two connecting plate (52) are followed sleeve (4) symmetry sets up, the top position at the middle part of connecting plate (52) is fixed with fixing base (53), the sunken shaping of fixing base (53) upper surface has half slot one (54), fixing base (53) upper surface detachable is fixed with latch fitting (55), the sunken shaping of lateral wall of latch fitting (55) has half slot two (56), half slot one (54) with half slot two (56) make up into the circular slot, the periphery wall protrusion of sleeve (4) has to insert and is fixed in fixed circle piece (57) in the circular slot.

7. The hydraulic hammer of claim 6, wherein: a buffering circular ring (58) is arranged in the circular groove, and the buffering circular ring (58) is sleeved on the fixed circular block (57).

8. The hydraulic hammer of claim 7, wherein: two vertical rib plates (61) and a horizontal rib plate (62) are fixed on the outer side surface of the connecting plate (52), the vertical rib plates (61) and the horizontal rib plates (62) are combined to form an H-shaped reinforcing rib, and the upper part of the H-shaped reinforcing rib is connected with the fixed seat (53); a first ribbed plate (63) is fixedly connected between one side face of the horizontal ribbed plate (62) and the outer side face of the fixed seat (53), and a second ribbed plate (64) is fixedly connected between the other side face of the horizontal ribbed plate (62) and the outer side face of the connecting plate (52).