阅读说明：本技术 旋挖钻机用减震油缸 (Shock-absorbing oil cylinder for rotary drilling rig ) 是由 孟凡秀 张磊 于 2019-09-30 设计创作，主要内容包括：本发明涉及一种旋挖钻机用减震油缸,包括主油缸和副油缸；所述主油缸的主缸底座与副油缸的缸底座之间设置油气减震缸；所述油气减震缸包括储油缸筒和储气缸筒,所述储油缸筒内设置外活塞,所述外活塞上设置通油间隙；所述缸头块上开设筒孔,所述储气缸筒一端穿过缸头块的筒孔与外活塞固定连接,所述储气缸筒内设置内活塞；所述内活塞与副油缸的副缸底座之间形成气腔,所述外活塞上开设通油孔,所述内活塞经过外活塞的通油孔与主油缸的主缸底座之间形成储油腔。配置了主、副油缸两种油缸,分别支撑钻杆和机身,可以在钻机上作业的时候,可以对钻杆提供一个稳定的支撑,实现对钻杆的稳定。(The invention relates to a damping oil cylinder for a rotary drilling rig, which comprises a main oil cylinder and an auxiliary oil cylinder; an oil-gas damping cylinder is arranged between a main cylinder base of the main oil cylinder and a cylinder base of the auxiliary oil cylinder; the oil-gas damping cylinder comprises an oil storage cylinder barrel and an air storage cylinder barrel, wherein an outer piston is arranged in the oil storage cylinder barrel, and an oil through gap is formed in the outer piston; a cylinder hole is formed in the cylinder head block, one end of the air storage cylinder penetrates through the cylinder hole of the cylinder head block and is fixedly connected with the outer piston, and an inner piston is arranged in the air storage cylinder; an air cavity is formed between the inner piston and an auxiliary cylinder base of the auxiliary oil cylinder, an oil through hole is formed in the outer piston, and an oil storage cavity is formed between the inner piston and a main cylinder base of the main oil cylinder through the oil through hole of the outer piston. The main oil cylinder and the auxiliary oil cylinder are configured to respectively support the drill rod and the machine body, so that when the drilling machine operates, a stable support can be provided for the drill rod, and the drill rod is stabilized.)

1. A shock absorption oil cylinder for a rotary drilling cylinder drill is characterized by comprising a main oil cylinder and an auxiliary oil cylinder; an oil-gas damping cylinder is arranged between a main cylinder base of the main oil cylinder and a cylinder base of the auxiliary oil cylinder;

the oil-gas damping cylinder comprises an oil storage cylinder barrel and an air storage cylinder barrel, one end of the oil storage cylinder barrel is fixedly connected with a main cylinder base in a sealing mode, a cylinder head block is arranged at the other end of the oil storage cylinder barrel in a sealing mode, an outer piston is arranged in the oil storage cylinder barrel, an oil through gap is formed in the outer piston, and the oil through gap is suitable for communicating a rod cavity and a rodless cavity in the oil storage cylinder barrel;

the cylinder head block is provided with a cylinder hole, one end of the air storage cylinder penetrates through the cylinder hole of the cylinder head block to be fixedly connected with the outer piston, the other end of the air storage cylinder is connected with an auxiliary cylinder base of the auxiliary oil cylinder in a sealing and fixed mode, and the inner piston is arranged in the air storage cylinder;

an air cavity is formed between the inner piston and an auxiliary cylinder base of the auxiliary oil cylinder, an oil through hole is formed in the outer piston, and an oil storage cavity is formed between the inner piston and a main cylinder base of the main oil cylinder through the oil through hole of the outer piston.

2. The damping oil cylinder for the rotary drilling rig according to claim 1, wherein the connection structure between the cylinder head block and the oil storage cylinder barrel is as follows: a first step hole and a second step hole are formed in the oil storage cylinder barrel, the second step hole is close to the outer side, and an internal thread is formed in the second step hole;

a first step column and a second step column are formed on the cylinder head block, an external thread is formed on the outer wall of the second step column, a first sealing ring is arranged on the outer wall of the first step column, a second sealing ring is arranged between the second step column and the cylinder head block, and an inclined sealing surface matched with the second sealing ring is formed at the orifice of the second step hole;

the first step column of the cylinder head block is inserted into the first step hole, the first sealing ring is in sealing fit with the first step hole, the second step column is in threaded connection and fixed with the second step hole, and the inclined sealing surface of the second step hole is in sealing fit with the second sealing ring.

3. The shock absorption oil cylinder for the rotary drilling rig according to claim 1, wherein the movable sealing structure between the inner piston and the air cylinder barrel is as follows:

the outer wall of the inner piston is provided with a first guide ring and a second guide ring, and a Stent seal and an oil-gas seal are arranged between the first guide ring and the second guide ring.

4. The shock absorption oil cylinder for the rotary drilling rig as claimed in claim 1, wherein an air inlet nozzle is arranged on the auxiliary cylinder base, is communicated with an air cavity of an air storage cylinder and is suitable for inputting nitrogen into the air cavity;

a first oil inlet nozzle is arranged on the main cylinder base, and a second oil inlet nozzle is arranged on the oil storage cylinder barrel.

5. The damping oil cylinder for the rotary drilling rig according to claim 1, wherein the main oil cylinder comprises a main cylinder barrel and a main cylinder rod, a main cylinder head is fixedly arranged at the front end of the main cylinder barrel, the front end of the main cylinder rod extends out of the main cylinder head, and a connecting head is fixedly arranged at the front end of the main cylinder rod;

a first radial convex ring is formed on the connecting head, and a second radial convex ring is formed on the main cylinder head;

when the main cylinder rod retracts into the main cylinder barrel, the first radial convex ring and the second radial convex ring are attached, a pair of clamping blocks are arranged outside the first radial convex ring and the second radial convex ring, a pair of clamping ports are formed on the inner sides of the clamping blocks, the outer end edges of the first radial convex ring and the second radial convex ring are arranged in the clamping ports, locking rings are sleeved outside the two clamping blocks, and the locking rings are suitable for limiting the two clamping blocks to do radial separation movement, so that the first radial convex ring and the second radial convex ring are locked in the clamping ports of the two clamping blocks;

the outer diameter of the main cylinder head is smaller than the inner diameter of the locking ring, so that the locking ring can move to the main cylinder head when unlocking is carried out, and the two locking rings can be unlocked to be separated and unlocked in the radial direction.

6. The damping oil cylinder for the rotary drilling rig as claimed in claim 5, wherein the fixture blocks are of a semi-circular ring structure, and the two fixture blocks are spliced to form a circular ring and clamped outside the first radial convex ring and the second radial convex ring.

7. The damping cylinder for the rotary drilling rig according to claim 6, wherein one side of each of the two clamping blocks, which is far away from the main cylinder head, is radially protruded outwards to form a third radial protruding ring, and when the locking ring is sleeved outside the two clamping blocks, the two third radial protruding rings are suitable for limiting the locking ring to axially move out of the clamping blocks.

8. The damping cylinder for the rotary drilling rig according to claim 6, wherein the outer walls of the two clamping blocks are respectively provided with a semicircular first sealing groove, the two first sealing grooves form a circular first sealing groove, a first sealing ring is arranged in the circular first sealing groove, and the first sealing ring is in contact fit with an inner hole of the locking ring so as to increase the friction force of the locking ring in axial movement.

9. The damping oil cylinder for the rotary drilling rig as claimed in claim 6, wherein a second sealing groove is formed in the outer wall of the main cylinder head, a second sealing ring is arranged in the second sealing groove, and the second sealing ring is in contact fit with an inner hole of the locking ring so as to increase the friction force of the locking ring in axial movement.

10. The damping oil cylinder for the rotary drilling rig according to claim 5, wherein the connection structure between the main cylinder head and the main cylinder barrel is as follows:

the front end of the main cylinder barrel is welded with a lengthened cylinder, and the wall thickness of the lengthened cylinder is greater than that of the main cylinder barrel;

the main cylinder head is provided with a fourth radial convex ring, the fourth radial convex ring is abutted and attached to the front end of the lengthening cylinder, and a plurality of locking screws axially penetrate through the fourth radial convex ring to be in threaded connection with the lengthening cylinder, so that the main cylinder head is axially fixed to the front end of the lengthening cylinder.

Technical Field

The invention relates to the field of hydraulic pressure, in particular to a damping oil cylinder for a rotary drilling rig.

Background

The existing oil cylinders are not high in damping performance, the vibration of the drill rod is easy to transmit to a rack through the oil cylinders, and the structure of the whole drilling rig is unstable;

secondly, the front end of a cylinder rod of the conventional rotary drilling rig is connected with a drill bit on the drilling rig, the drill bit is generally large, and an oil cylinder and the cylinder rod which are used on the conventional rotary drilling rig are not provided with a locking mechanism, so that the cylinder rod can be pulled out of a cylinder body when the drill bit moves, and the cylinder rod is easily damaged.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the shortcomings of the prior art are overcome, the damping oil cylinder for the rotary drilling rig is provided, and the problem that the oil cylinder is poor in damping performance in the past, so that force received by a drill rod is directly transmitted to a machine body to enable the machine body to rock is solved.

The technical scheme adopted by the invention for solving the technical problems is as follows: a damping oil cylinder for a rotary drilling rig comprises a main oil cylinder and an auxiliary oil cylinder; an oil-gas damping cylinder is arranged between a main cylinder base of the main oil cylinder and a cylinder base of the auxiliary oil cylinder;

the oil-gas damping cylinder comprises an oil storage cylinder barrel and an air storage cylinder barrel, one end of the oil storage cylinder barrel is fixedly connected with a main cylinder base in a sealing mode, a cylinder head block is arranged at the other end of the oil storage cylinder barrel in a sealing mode, an outer piston is arranged in the oil storage cylinder barrel, an oil through gap is formed in the outer piston, and the oil through gap is suitable for communicating a rod cavity and a rodless cavity in the oil storage cylinder barrel;

the cylinder head block is provided with a cylinder hole, one end of the air storage cylinder penetrates through the cylinder hole of the cylinder head block to be fixedly connected with the outer piston, the other end of the air storage cylinder is connected with an auxiliary cylinder base of the auxiliary oil cylinder in a sealing and fixed mode, and the inner piston is arranged in the air storage cylinder;

an air cavity is formed between the inner piston and an auxiliary cylinder base of the auxiliary oil cylinder, an oil through hole is formed in the outer piston, and an oil storage cavity is formed between the inner piston and a main cylinder base of the main oil cylinder through the oil through hole of the outer piston.

Further, the connection structure between the cylinder head block and the oil storage cylinder barrel is as follows: a first step hole and a second step hole are formed in the oil storage cylinder barrel, the second step hole is close to the outer side, and an internal thread is formed in the second step hole;

a first step column and a second step column are formed on the cylinder head block, an external thread is formed on the outer wall of the second step column, a first sealing ring is arranged on the outer wall of the first step column, a second sealing ring is arranged between the second step column and the cylinder head block, and an inclined sealing surface matched with the second sealing ring is formed at the orifice of the second step hole;

the first step column of the cylinder head block is inserted into the first step hole, the first sealing ring is in sealing fit with the first step hole, the second step column is in threaded connection and fixed with the second step hole, and the inclined sealing surface of the second step hole is in sealing fit with the second sealing ring.

Further, the movable sealing structure between the inner piston and the air cylinder barrel is as follows:

the outer wall of the inner piston is provided with a first guide ring and a second guide ring, and a Stent seal and an oil-gas seal are arranged between the first guide ring and the second guide ring.

Further, an air inlet nozzle is arranged on the auxiliary cylinder base, is communicated with an air cavity of the air storage cylinder and is suitable for inputting nitrogen into the air cavity;

a first oil inlet nozzle is arranged on the main cylinder base, and a second oil inlet nozzle is arranged on the oil storage cylinder barrel.

Furthermore, the main oil cylinder comprises a main cylinder barrel and a main cylinder rod, a main cylinder head is fixedly arranged at the front end of the main cylinder barrel, the front end of the main cylinder rod extends out of the main cylinder head, and a connecting head is fixedly arranged at the front end of the main cylinder rod;

a first radial convex ring is formed on the connecting head, and a second radial convex ring is formed on the main cylinder head;

when the main cylinder rod retracts into the main cylinder barrel, the first radial convex ring and the second radial convex ring are attached, a pair of clamping blocks are arranged outside the first radial convex ring and the second radial convex ring, a pair of clamping ports are formed on the inner sides of the clamping blocks, the outer end edges of the first radial convex ring and the second radial convex ring are arranged in the clamping ports, locking rings are sleeved outside the two clamping blocks, and the locking rings are suitable for limiting the two clamping blocks to do radial separation movement, so that the first radial convex ring and the second radial convex ring are locked in the clamping ports of the two clamping blocks;

the outer diameter of the main cylinder head is smaller than the inner diameter of the locking ring, so that the locking ring can move to the main cylinder head when unlocking is carried out, and the two locking rings can be unlocked to be separated and unlocked in the radial direction.

Furthermore, the fixture blocks are of a semicircular annular structure, and the two fixture blocks are spliced to form a circular ring and are clamped outside the first radial convex ring and the second radial convex ring.

Further, one sides of the two clamping blocks, which are far away from the main cylinder head, are both protruded outwards in the radial direction to form third radial convex rings, and when the locking ring is sleeved outside the two clamping blocks, the two third radial convex rings are suitable for limiting the locking ring to move out of the clamping blocks in the axial direction.

Furthermore, semicircular first sealing grooves are formed in the outer walls of the two clamping blocks respectively, the two first sealing grooves form a circular first sealing groove, a first sealing ring is arranged in the circular first sealing groove, and the first sealing ring is in contact fit with an inner hole of the locking ring so as to increase the friction force of the locking ring in axial movement.

Furthermore, a second sealing groove is formed in the outer wall of the main cylinder head, a second sealing ring is arranged in the second sealing groove, and the second sealing ring is in contact fit with the inner hole of the locking ring so as to increase the friction force of the locking ring in axial movement.

Further, the connecting structure between the main cylinder head and the main cylinder barrel is as follows:

the front end of the main cylinder barrel is welded with a lengthened cylinder, and the wall thickness of the lengthened cylinder is greater than that of the main cylinder barrel;

the main cylinder head is provided with a fourth radial convex ring, the fourth radial convex ring is abutted and attached to the front end of the lengthening cylinder, and a plurality of locking screws axially penetrate through the fourth radial convex ring to be in threaded connection with the lengthening cylinder, so that the main cylinder head is axially fixed to the front end of the lengthening cylinder.

The invention has the beneficial effects that:

the damping oil cylinder for the rotary drilling rig is provided, and is provided with a main oil cylinder and an auxiliary oil cylinder which are respectively used for supporting a drill rod and a machine body, so that when the rotary drilling rig operates on the drilling rig, a stable support can be provided for the drill rod, and the stability of the drill rod is realized;

in addition, an oil gas damping cylinder is additionally arranged, and impact force on the two oil cylinders is buffered through oil pressure and oil gas, so that the oil cylinders can provide stable support and simultaneously buffer the influence of the impact force on a drill rod on the body of the rotary drilling rig.

When the main cylinder rod is reset and retracted into the main cylinder barrel, the connecting head and the main cylinder head can be locked, the axial movement of the connecting head and the main cylinder head is limited, the main cylinder rod is prevented from moving out of the main cylinder barrel, and the main cylinder is well protected.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a shock absorbing cylinder according to the present invention;

FIG. 2 is a schematic view of an oil and gas shock cylinder;

FIG. 3 is a graph of the results between the oil reservoir cylinder, main rigid base, outer piston, air reservoir cylinder and inner piston;

FIG. 4 is a partial view of the inner piston;

FIG. 5 is a schematic structural view of a cylinder rod mechanical lock for the rotary drilling rig;

FIG. 6 is a schematic view of two cartridges;

the hydraulic control system comprises a main oil cylinder, a main cylinder base, a main cylinder barrel, a main oil cylinder, a secondary cylinder base, a secondary oil-gas damping cylinder, an oil-gas damping cylinder, a secondary oil cylinder, an air storage cylinder, a secondary oil cylinder, an oil storage cylinder, a secondary oil cylinder; 51. the main cylinder rod 52, the connecting head 521, the first radial convex ring 6, the clamping block 61, the third radial convex ring 7, the lengthening cylinder 8, the main cylinder head 81, the second radial convex ring 82, the fourth radial convex ring 9 and the locking ring.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.