CN211009375U

CN211009375U - Oil cylinder for pile driver

Info

Publication number: CN211009375U
Application number: CN201922246886.9U
Authority: CN
Inventors: 郭晓春
Original assignee: Wuxi Hanwei Hydraulic Pneumatic Co ltd
Current assignee: Wuxi Hanwei Hydraulic Pneumatic Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-14
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a hydro-cylinder for pile driver, including cylinder body, piston and piston rod, the inside piston room that has of cylinder body, piston room bottom is provided with prevents oil return mechanism, prevent that oil return mechanism includes casing, first spring and activity body, casing and piston room fixed seal are connected, the casing middle part is hollow structure, and the casing middle part has seted up the depressed groove, the activity body is including sealed piece, annular block and linking ring piece, first spring one end and linking ring piece fixed connection. The utility model discloses a be provided with and prevent oil return mechanism, when the piston rod moved work area, stopped the fuel feeding, first spring recovered deformation this moment and drove the activity body and resume the normal position, and activity body bottom and sunken tank bottom end surface can form a sealed face, and the hydraulic oil of the indoor portion of prevention piston flows back, not only is favorable to improving the working property of pile driver, can also improve the life of hydro-cylinder.

Description

Oil cylinder for pile driver

Technical Field

The utility model relates to a hydro-cylinder technical field, in particular to hydro-cylinder for pile driver.

Background

The pile driver is a prefabricated pile and a cast-in-place pile hole forming device with multiple functions, high efficiency and less pollution, and is widely applied to foundation construction projects such as municipal construction, highway bridges, high-rise buildings and the like. The pile driver is matched with different working devices, is suitable for pore-forming operation under various working conditions, is suitable for soil geological conditions in most areas in China, and has a wide application range. The pile driver mainly comprises a walking pile driver and a crawler pile driver. The crawler-type chassis has the characteristics of large driving force, good universality, strong adaptability and the like, and can walk with load. The walking type pile driver adopts the hydraulic walking type chassis, has high automation degree, can automatically walk and rotate for 360 degrees, is provided with four hydraulic leg oil cylinders and walking oil cylinders to assist in walking and rotating, simultaneously increases the stability of the whole machine during construction, can be transported by the whole machine, has larger platform area, and is more suitable for operation on soft soil layers.

In the in-service use process, the pile driver can produce violent vibrations during operation, causes the hydraulic oil backward flow in the hydraulic leg hydro-cylinder very easily, not only can damage the oil pump, still leads to dangerous emergence.

Therefore, it is necessary to provide a cylinder for a pile driver to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an hydro-cylinder for pile driver to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an oil cylinder for a pile driver comprises a cylinder body, a piston and a piston rod, wherein a piston chamber is arranged in the cylinder body, an oil return preventing mechanism is arranged at the bottom end of the piston chamber and comprises a shell, a first spring and a movable body, the shell is fixedly and hermetically connected with the piston chamber, the middle of the shell is of a hollow structure, a concave groove is formed in the middle of the shell, the movable body comprises a sealing block, an annular block and a linking ring block, one end of the first spring is fixedly connected with the linking ring block, the other end of the first spring is fixedly connected with the inner wall of the concave groove, the outer wall of the linking ring block is matched with the inner wall of the concave groove, a plurality of oil through holes are formed in the side wall of the annular block, a notch and an annular groove are formed in the bottom end surface of the sealing block, a protruding ring block is;

the utility model discloses a stopper rod, including stopper rod, connecting portion, second spring, telescopic tube, connecting portion bottom fixed surface is provided with a plurality of guide bars, a plurality of spacing holes have been seted up on stopper rod top surface, spacing hole and guide bar looks adaptation.

Preferably, the cylinder body is internally provided with an oil inlet channel, the oil inlet channel is communicated with the middle part of the bottom end of the shell, the side wall of the cylinder body is provided with an oil outlet channel, and the oil outlet channel is arranged on one side of the top end of the shell.

Preferably, a sealing valve is externally connected to the oil outlet channel.

Preferably, the surface of the connecting ring block is sleeved with a sealing ring.

Preferably, the sealing block, the annular block and the connecting ring block are integrally formed.

The utility model discloses a technological effect and advantage:

1. the utility model has the advantages that the oil return preventing mechanism is arranged, when the piston rod moves to the working area, the oil supply is stopped, the first spring recovers deformation to drive the movable body to recover the original position, the bottom end of the movable body and the bottom end surface of the concave groove can form a sealing surface to prevent the hydraulic oil in the piston chamber from flowing back, the working performance of the pile driver can be improved, and the service life of the oil cylinder can be prolonged;

2. the utility model discloses a be provided with the second spring, the elasticity that utilizes the second spring can cushion with the mechanical shock that pile driver work produced, is favorable to further improving the life of hydro-cylinder.

Drawings

Fig. 1 is a schematic view of the overall front view section of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1 according to the present invention.

Fig. 3 is an enlarged view of a portion B of fig. 1 according to the present invention.

In the figure: 1 cylinder body, 2 pistons, 3 piston rods, 4 piston chambers, 5 shells, 6 first springs, 7 concave grooves, 8 sealing blocks, 9 annular blocks, 10 connecting annular blocks, 11 oil through holes, 12 notches, 13 annular grooves, 14 protruding annular blocks, 15 connecting parts, 16 second springs, 17 guide rods and 18 limiting holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a cylinder for pile driver as shown in figures 1-3, which comprises a cylinder body 1, a piston 2 and a piston rod 3, wherein a piston chamber 4 is arranged in the cylinder body 1, an oil return prevention mechanism is arranged at the bottom end of the piston chamber 4, the oil return prevention mechanism comprises a shell 5, a first spring 6 and a movable body, the shell 5 is fixedly and hermetically connected with the piston chamber 4, the middle part of the shell 5 is of a hollow structure, a concave groove 7 is arranged at the middle part of the shell 5, the movable body comprises a sealing block 8, an annular block 9 and a linking ring block 10, one end of the first spring 6 is fixedly connected with the linking ring block 10, the other end is fixedly connected with the inner wall of the concave groove 7, the outer wall of the linking ring block 10 is matched with the inner wall of the concave groove 7, a plurality of oil through holes 11 are arranged on the side wall of the annular block 9, a notch 12 and, the bottom end surface of the concave groove 7 is provided with a convex ring block 14, and the convex ring block 14 is matched with the annular groove 13;

the utility model discloses a hydraulic ram, including gag lever post, gag lever post top, connecting portion 15, fixed second spring 16 that is provided with between connecting portion 15 and the gag lever post, the inside telescopic tube that is provided with of second spring 16, connecting portion 15 bottom fixed surface is provided with a plurality of guide bars 17, a plurality of spacing holes 18 have been seted up on gag lever post top surface, spacing hole 18 and guide bar 17 looks adaptation, through being provided with second spring 16, utilize second spring 16's elasticity can cushion with the mechanical vibrations that pile driver work produced, are favorable to further improving the life of hydro-cylinder.

Further, in the above technical scheme, an oil inlet channel is arranged inside the cylinder body 1, the oil inlet channel is communicated with the middle of the bottom end of the housing 5, an oil outlet channel is arranged on the side wall of the cylinder body 1, and the oil outlet channel is arranged on one side of the top end of the housing 5;

further, in the above technical solution, a sealing valve is externally connected to the oil outlet channel;

further, in the above technical solution, the surface of the connecting ring block 10 is sleeved with a sealing ring, which is beneficial to improving the sealing performance;

further, in the above technical solution, in order to improve the overall performance of the movable body, the sealing block 8, the ring block 9, and the engaging ring block 10 are integrally formed.

The utility model discloses the theory of operation:

referring to specification attached drawing 1-3, the utility model discloses when using, hydraulic oil enters into inside 5 and be full of the inside back of 8 surperficial notches 12 of sealed piece through the oil feed passageway, promote sealed piece 8 and whole activity up-moving, sealed piece 8 bottom and 7 bottom surface formation gaps in depressed groove, hydraulic oil lets in inside 7 in the depressed groove, and enter into 4 inside promotion pistons of piston room through the oil hole and drive piston rod 3 up-moving, when piston rod 3 moved to work area, stop the fuel feeding, first spring 6 resumes deformation and drives the activity body normal position this moment, activity body bottom and 7 bottom surface in depressed groove can form a sealed face, prevent the inside hydraulic oil backward flow of piston room 4, not only be favorable to improving the working property of pile driver, can also improve the life of hydro-cylinder.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides an hydro-cylinder for pile driver, includes cylinder body (1), piston (2) and piston rod (3), its characterized in that: the cylinder body (1) is internally provided with a piston chamber (4), the bottom end of the piston chamber (4) is provided with an oil return prevention mechanism, the oil return prevention mechanism comprises a shell (5), a first spring (6) and a movable body, the shell (5) is fixedly and hermetically connected with the piston chamber (4), the middle part of the shell (5) is of a hollow structure, a concave groove (7) is formed in the middle part of the shell (5), the movable body comprises a sealing block (8), a ring block (9) and a linking ring block (10), one end of the first spring (6) is fixedly connected with the linking ring block (10), the other end of the first spring is fixedly connected with the inner wall of the concave groove (7), the outer wall of the linking ring block (10) is matched with the inner wall of the concave groove (7), the side wall of the ring block (9) is provided with a plurality of oil through holes (11), the bottom surface of the sealing block (8) is provided with, the bottom end surface of the concave groove (7) is provided with a convex ring block (14), and the convex ring block (14) is matched with the annular groove (13);

the utility model discloses a stopper rod, stopper rod top is provided with connecting portion (15), fixed second spring (16) that are provided with between connecting portion (15) and the stopper rod, the inside telescopic tube that is provided with of second spring (16), connecting portion (15) bottom fixed surface is provided with a plurality of guide bars (17), a plurality of spacing holes (18) have been seted up on stopper rod top surface, spacing hole (18) and guide bar (17) looks adaptation.

2. The cylinder for a pile driver as claimed in claim 1, wherein: the cylinder body (1) is inside to have the oil feed passageway, the oil feed passageway is linked together with casing (5) bottom middle part, cylinder body (1) lateral wall has the passageway of producing oil, the passageway setting of producing oil is in casing (5) top one side.

3. The cylinder for a pile driver as claimed in claim 2, wherein: the oil outlet channel is externally connected with a sealing valve.

4. The cylinder for a pile driver as claimed in claim 1, wherein: the surface of the connecting ring block (10) is sleeved with a sealing ring.

5. The cylinder for a pile driver as claimed in claim 1, wherein: the sealing block (8), the annular block (9) and the connecting ring block (10) are integrally formed.