CN201588535U

CN201588535U - Hydraulic cylinder of oil hydraulic drilling machine

Info

Publication number: CN201588535U
Application number: CN 200920314098
Authority: CN
Inventors: 杨海学; 张强; 王进全; 张福
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2009-11-05
Filing date: 2009-11-05
Publication date: 2010-09-22
Anticipated expiration: 2019-11-05

Abstract

The utility model discloses a hydraulic cylinder of an oil hydraulic drilling machine, which comprises a piston rod, a cylinder barrel and a built-in cylinder barrel. The built-in cylinder barrel is sleeved inside the cylinder barrel, a clearance is arranged between the cylinder barrel and the built-in cylinder barrel, one end of the cylinder barrel is provided with a front end cap, the piston rod penetrates through the front end cap to extend into the clearance between the cylinder barrel and the built-in cylinder barrel, end heads of the other ends of the cylinder barrel and the built-in cylinder barrel are fixedly connected, a guiding belt A and a guiding belt B are disposed between the piston rod and the wall of the cylinder barrel, the guiding belt A, the guiding belt B, the piston rod and the cylinder barrel form a piston rod cavity, the wall of the cylinder barrel is provided with an oil port C of the piston rod cavity, a piston cavity II is disposed between the piston rod and the wall of the built-in cylinder barrel and provided with an oil port II, the interior cavity of the piston rod forms a piston cavity I, and the piston cavity I is provided with an oil port A. The hydraulic cylinder can realize hoisting and differential action functions of three types of specific thrusts and speeds.

Description

Oil hydraulic drill rig hydraulic cylinder

Technical field

The utility model belongs to petroleum recovering machinery technical field, relates to a kind of oil hydraulic drill rig hydraulic cylinder.

Background technology

On existing oil hydraulic drill rig, all use traditional drilling well winch to drive the trip crane system, instructions for use for lifting speed and lifting force is not high, do not satisfy hydraulic drill rig underloading high speed, heavy-duty low-speed, efficiently remove the different technologies needs of drill string, therefore fluid cylinder drives the operation that rig trip crane system has had influence on efficient lifting day by day, transferred drill string, becomes the technical barrier that restriction is enhanced productivity.

Summary of the invention

The purpose of this utility model provides a kind of oil hydraulic drill rig hydraulic cylinder, and it is single to have solved the prior art functions of the equipments, can not satisfy hydraulic drill rig underloading high speed, heavy-duty low-speed, efficiently remove the problem of drill string different technologies needs.

The technical scheme that the utility model adopted is, a kind of oil hydraulic drill rig hydraulic cylinder, comprise piston rod, cylinder barrel, built-in cylinder barrel, wherein be with built-in cylinder barrel within the cylinder barrel, leave the space between the cylinder of cylinder barrel and built-in cylinder barrel, one end of cylinder barrel is provided with drive end bearing bracket, the piston rod of piston rod partly is columnar structured, piston rod passes drive end bearing bracket and stretches in the space between cylinder barrel and the built-in cylinder barrel, fixedly connected in the other end termination of cylinder barrel and built-in cylinder barrel, the contact surface of cylinder barrel and built-in cylinder barrel is provided with O RunddichtringO II;

Be provided with guidance tape A and guidance tape B between piston rod and the cylinder barrel barrel, wherein guidance tape A is provided with O RunddichtringO I and combined seal ring I, guidance tape A, guidance tape B, piston rod and cylinder barrel constitute rod end chamber, and the barrel of cylinder barrel is provided with the hydraulic fluid port C of rod end chamber;

Be provided with plunger shaft II between piston rod and the built-in cylinder barrel barrel, combined seal ring II is installed at the two ends of plunger shaft II and guidance tape C keeps sealing, and plunger shaft II is provided with hydraulic fluid port B;

The internal cavities of piston rod constitutes plunger shaft I, and built-in cylinder barrel inside is provided with the fluid passage, and plunger shaft I is communicated with hydraulic fluid port A by the fluid passage.

Oil hydraulic drill rig hydraulic cylinder of the present utility model, its feature also is:

The hydraulic action area of described plunger shaft II is greater than the hydraulic action area of plunger shaft I.

The beneficial effects of the utility model are, be applicable to installed power certain (pressure flow is constant), the hydraulic drill rig drill string hoisting system that lifting force and lifting rate request excursion are bigger, satisfy hydraulic drill rig underloading high speed, heavy-duty low-speed, efficiently remove the needs of drill string, realize efficient lifting, transfer the drill string operation.

Description of drawings

Fig. 1 is the structural representation of the utility model device.

Among the figure, 1. piston rod, 2. drive end bearing bracket, 3.O RunddichtringO I, 4. combined seal ring I, 5. guidance tape A, 6. combined seal ring II, 7. cylinder barrel, 8. guidance tape B, 9. guidance tape C, 10. built-in cylinder barrel, 11.O RunddichtringO II, 12. rod end chamber, 13. plunger shaft I, 14. plunger shaft II, A, B, C are three hydraulic fluid ports of hydraulic cylinder.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As Fig. 1, the structure of the utility model device is, comprise piston rod 1, cylinder barrel 7, built-in cylinder barrel 10, wherein be with built-in cylinder barrel 10 within the cylinder barrel 7, leave the space between the cylinder of cylinder barrel 7 and built-in cylinder barrel 10, one end of cylinder barrel 7 is provided with drive end bearing bracket 2, the piston rod of piston rod 1 partly is columnar structured, piston rod 1 passes drive end bearing bracket 2 and stretches in the space between cylinder barrel 7 and the built-in cylinder barrel 10, the other end termination of cylinder barrel 7 and built-in cylinder barrel 10 adopts bolt to be connected, the contact surface of cylinder barrel 7 and built-in cylinder barrel 10 is provided with O RunddichtringO II 11, so that keep sealing;

Be provided with guidance tape A 5 and guidance tape B8 between piston rod 1 and cylinder barrel 7 barrels, wherein guidance tape A 5 is provided with O RunddichtringO I 3 and combined seal ring I 4, guidance tape A 5, guidance tape B8, piston rod 1 constitute rod end chamber 12 with cylinder barrel 7 four, and the barrel of cylinder barrel 7 is provided with the hydraulic fluid port C of rod end chamber 12;

Be provided with plunger shaft II 14 between piston rod 1 and built-in cylinder barrel 10 barrels, combined seal ring II 6 is installed at the two ends of plunger shaft II 14 and guidance tape C9 keeps sealing, and plunger shaft II 14 is provided with hydraulic fluid port B;

The internal cavities of piston rod 1 constitutes plunger shaft I13, and built-in cylinder barrel 10 inside are provided with the fluid passage, and plunger shaft I13 is communicated with hydraulic fluid port A by the fluid passage.

Hydraulic cylinder of the present utility model includes two plunger shaft (being plunger shaft I13 and plunger shaft II 14), a rod end chamber 12, it is double acting hydraulic cylinder with built-in cylinder barrel 10 and hollow piston bar 1, two plunger shaft are independent sealed cavity, independent fuel feeding or while fuel feeding can be distinguished in two chambeies, to realize differential function; This hydraulic cylinder structure also can be realized the lifting and the differential function of 3 kinds of specific thrusts and speed under the constant situation of hydraulic system pressure and flow.

With reference to Fig. 1, hydraulic cylinder of the present utility model course of work under the constant situation of hydraulic system pressure and flow is as follows:

A) underloading high speed lifting.At oil supply port A fuel feeding, when hydraulic fluid port B and C led to oil return, whole flows of hydraulic system entered plunger shaft I13.Because plunger shaft I13 hydraulic action area is less, stretches out fast so can realize the piston rod 1 of hydraulic cylinder.Under this operating mode, because the hydraulic action area of plunger shaft I13 is less, under the certain situation of hydraulic system pressure, the thrust of hydraulic cylinder is just less relatively.This operating mode can satisfy the hydraulic drill rig underloading drill string needs that hoist at a high speed.

B) carry the middling speed lifting in.At oil supply port B fuel feeding, when hydraulic fluid port A and C led to oil return, whole flows of hydraulic system entered plunger shaft II 14.Because the hydraulic action area of plunger shaft II 14 is greater than plunger shaft I13, the piston rod 1 of hydraulic cylinder stretches out the more above-mentioned a) operating mode of speed slow (middling speed).Under this operating mode, because the hydraulic action area of plunger shaft II 14 is greater than plunger shaft I13, under the certain situation of hydraulic system pressure, the relative a) operating mode of the thrust of hydraulic cylinder big (in carry).This operating mode can satisfy in the hydraulic drill rig carries the middling speed drill string needs that hoist.

C) heavy-duty low-speed lifting.At oil supply port A and B while fuel feeding, when hydraulic fluid port C led to oil return, whole fuel feeding of hydraulic system entered plunger shaft I13 and plunger shaft II 14 simultaneously.This moment plunger shaft I13 and plunger shaft II 14 hydraulic action area summation maximum, so the piston rod of hydraulic cylinder stretches out speed the slowest (low speed).Under this operating mode because the hydraulic pressure summation active area maximum of two plunger shaft, under the certain situation of hydraulic system pressure, the thrust of hydraulic cylinder is relative a), b) operating mode maximum (heavy duty).This operating mode can satisfy the hydraulic drill rig heavy duty needs that hoist.

D) differential function.A), b), c) under the operating mode, hydraulic fluid port C all changes into being connected with oil-feed port and can realize the differential function of fluid cylinder.Realize the lifting speed and the lifting force of other three kinds of couplings, satisfy fluid cylinder and drive the efficient lifting of rig trip crane system, transfer the drill string operation.

The utility model device is applicable to installed power certain (pressure flow is constant), the hydraulic drill rig drill string hoisting system that lifting force and lifting rate request excursion are bigger, can replace traditional drilling well winch to drive the trip crane system, realize hydraulic drill rig underloading high speed, heavy-duty low-speed, efficiently remove the needs of drill string.

Claims

1. oil hydraulic drill rig hydraulic cylinder, it is characterized in that: comprise piston rod (1), cylinder barrel (7), built-in cylinder barrel (10), wherein be with built-in cylinder barrel (10) within the cylinder barrel (7), leave the space between the cylinder of cylinder barrel (7) and built-in cylinder barrel (10), one end of cylinder barrel (7) is provided with drive end bearing bracket (2), the piston rod of piston rod (1) partly is columnar structured, piston rod (1) passes drive end bearing bracket (2) and stretches in the space between cylinder barrel (7) and the built-in cylinder barrel (10), cylinder barrel (7) is fixedlyed connected with the other end termination of built-in cylinder barrel (10), and the contact surface of cylinder barrel (7) and built-in cylinder barrel (10) is provided with O RunddichtringO II (11);

Be provided with guidance tape A (5) and guidance tape B (8) between piston rod (1) and cylinder barrel (7) barrel, wherein guidance tape A (5) is provided with O RunddichtringO I (3) and combined seal ring I (4), guidance tape A (5), guidance tape B (8), piston rod (1) constitute rod end chamber (12) with cylinder barrel (7) four, and the barrel of cylinder barrel (7) is provided with the hydraulic fluid port C of rod end chamber (12);

Be provided with plunger shaft II (14) between piston rod (1) and built-in cylinder barrel (10) barrel, combined seal ring II (6) is installed at the two ends of plunger shaft II (14) and guidance tape C (9) keeps sealing, and plunger shaft II (14) is provided with hydraulic fluid port B;

The internal cavities of piston rod (1) constitutes plunger shaft I (13), and built-in cylinder barrel (10) inside is provided with the fluid passage, and plunger shaft I (13) is communicated with hydraulic fluid port A by the fluid passage.

2. oil hydraulic drill rig hydraulic cylinder according to claim 1 is characterized in that: the hydraulic action area of described plunger shaft II (14) is greater than the hydraulic action area of plunger shaft I (13).