CN114033914A

CN114033914A - Novel rotary joint

Info

Publication number: CN114033914A
Application number: CN202111324867.9A
Authority: CN
Inventors: 肖艳平; 李联中; 詹良斌; 裘伟斌; 李晓明; 孟祥卿; 赵子良
Original assignee: Suzhou Douson Drilling & Production Equipment Co ltd; Huanghe Drilling Co of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Suzhou Dawson Drilling And Production Equipment Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-02-11

Abstract

The invention discloses a novel rotary joint which comprises a conversion joint and a flange pipe, wherein a hub is arranged on the outer side of the flange pipe, one end of the flange pipe is connected with one end of the conversion joint, a fastening shaft is arranged at one end, close to the conversion joint, of the hub, a bearing is arranged in the fastening shaft, and a locking cap is arranged on the outer side of the bearing. The invention has the beneficial effects that: the rotary contact surface between the shaft and the bearing adopts the trapezoidal sawtooth shape with larger effective contact area, the problem that the radial bearing capacity of the traditional sliding bearing is weak is solved, the structure is simple, compared with the traditional bearing, the bearing size of the design can be smaller under the same radial bearing capacity, the space is saved, the economic cost is reduced, and the economic benefit is improved.

Description

Novel rotary joint

Technical Field

The invention relates to the technical field of connection structures in drilling and production industries, in particular to a novel rotary joint.

Background

The high-pressure rotary joint is commonly used in high-pressure transmission pipelines in the petroleum and natural gas drilling industry and other acidic environments for transmitting liquid flow under high-pressure working conditions, the working pressure is between 42MPa and 105MPa, the high-pressure rotary joint is connected by a clamp, the rotation part realizes the functions by a bearing, the movement is flexible, the disassembly and the assembly are convenient, and the practicability is high.

The conventional rolling bearing has the following defects: rotatory elbow takes place rotary motion when the installation, also can produce frequent rotary motion in work, if adopt antifriction bearing at this rotatory elbow junction, the size is too big, is unfavorable for it to realize the rotation function, and the activity is limited, and the dismouting is also not very convenient.

The conventional sliding bearing has the following defects: in a common sliding bearing structure, the contact surface of a shaft and a bearing is only a single contact surface, so that the bearing capacity of the structure is low, and the requirement of high-pressure environment operation in the oil drilling and production process cannot be met.

Disclosure of Invention

The present invention is directed to a novel rotary joint to solve the problems set forth above in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel rotary joint, includes crossover sub and flange pipe, the flange outside of tubes side is equipped with wheel hub, flange pipe one end with crossover sub one end is connected, wheel hub is close to the fastening axle is installed to crossover sub's one end, be equipped with the bearing in the fastening axle, the bearing outside is equipped with the locking cap.

Preferably, the bearing is composed of an upper part and a lower part, the upper part and the lower part are connected through bolts A, and a pin C is further arranged between the upper part and the lower part.

Preferably, the fastening shaft and the bearing sliding contact bearing surface are both provided with matched trapezoid saw-toothed shapes.

Preferably, the fastening shaft is in threaded connection with the hub and is locked by a locking nut arranged on one side of the fastening shaft.

Preferably, a sealing ring and a sealing gasket are respectively arranged at the gap between the adapter and the hub.

Preferably, a bushing is arranged between the adapter and the hub.

Preferably, a clamping hoop is further arranged between the conversion head and the flange pipe.

Advantageous effects

According to the novel rotary joint provided by the invention, the rotary contact surface between the shaft and the bearing is in the trapezoidal sawtooth shape with larger effective contact area, the problem of weak radial bearing capacity of the traditional sliding bearing is solved, the structure is simple, compared with the traditional bearing, the designed bearing can be smaller in size under the same radial bearing capacity, the space is saved, the economic cost is reduced, and the economic benefit is improved.

Drawings

FIG. 1 is a schematic view of a fastening shaft and a bearing structure according to the present invention;

FIG. 2 is a schematic cross-sectional view of a fastening shaft and bearing of the present invention;

FIG. 3 is a schematic view of the overall structure of the present invention;

fig. 4 is a schematic structural view of the contact end of the adapter and the flange pipe of the present invention.

Reference numerals

1-bearing, 2-fastening shaft, 3-locking cap, 4-locking nut, 5-hub, 6-bushing, 7-sealing ring, 8-sealing gasket, 9-clamp, 10-flange pipe and 11-adapter.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Examples

As shown in fig. 1-4, a novel rotary joint comprises a conversion joint 11 and a flange pipe 10, wherein a hub 5 is arranged outside the flange pipe 10, one end of the flange pipe 10 is connected with one end of the conversion joint 11, a fastening shaft 2 is installed at one end of the hub 5 close to the conversion joint 11, a bearing 1 is arranged in the fastening shaft 2, and a locking cap 3 is arranged outside the bearing 1.

Preferably, the bearing 1 is composed of an upper part and a lower part, the upper part and the lower part are connected through bolts A, and a pin C is further arranged between the upper part and the lower part.

Preferably, the fastening shaft 2 and the bearing surface of the bearing 1 are in sliding contact and are in a matched trapezoidal sawtooth shape.

Preferably, the fastening shaft 2 is screw-coupled to the hub 5 and is locked by a locking nut 4 provided at one side of the fastening shaft 2.

Preferably, a sealing ring 7 and a sealing gasket 8 are respectively arranged at the gap between the conversion joint 11 and the hub 5.

Preferably, a bushing 6 is provided between the adapter 11 and the hub 5.

Preferably, a clamping band 9 is further arranged between the conversion head 11 and the flange pipe 10.

The bearing is manufactured by an upper part and a lower part, is connected by a bolt A, and is prevented from position dislocation by a pin C.

The sliding contact bearing surface between the fastening shaft and the bearing is in a trapezoidal sawtooth shape B, so that the contact area is increased, and meanwhile, the bearing capacity is increased.

Adopt threaded connection between fastening shaft and the wheel hub, the junction left side is equipped with locking device, locks with lock nut, and the bearing upper end is equipped with the locking cap, is equipped with sealing washer and sealed sealing gasket sealing device in crossover sub and wheel hub's clearance, and the sealing washer can prevent that lubricating oil from spilling and the interior fluid's of pipeline leakage, and sealed the pressure that can disperse nut and nut locking process to wheel hub and crossover sub.

Be equipped with the bush between wheel hub and crossover sub, prevent the inside little clastic entering of solid of pipeline, adopt clamp connection between crossover sub and the flange pipe, make its easy dismounting.

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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.

Claims

1. A novel rotary joint comprises a conversion joint (11) and a flange pipe (10), and is characterized in that: the flange pipe (10) outside is equipped with wheel hub (5), flange pipe (10) one end with crossover sub (11) one end is connected, wheel hub (5) are close to fastening axle (2) are installed to the one end of crossover sub (11), be equipped with bearing (1) in fastening axle (2), the bearing (1) outside is equipped with locking cap (3).

2. The new rotary joint as set forth in claim 1, wherein: the bearing (1) is composed of an upper part and a lower part, the upper part and the lower part are connected through bolts A, and a pin C is arranged between the upper part and the lower part.

3. The new rotary joint as set forth in claim 1, wherein: the fastening shaft (2) and the bearing (1) are in sliding contact with the bearing surfaces and are respectively provided with a matched trapezoid sawtooth shape.

4. The new rotary joint as set forth in claim 1, wherein: fastening axle (2) with wheel hub (5) threaded connection, and through lock nut (4) that fastening axle (2) one side set up lock.

5. The new rotary joint as set forth in claim 1, wherein: and a sealing ring (7) and a sealing gasket (8) are respectively arranged at the gap between the adapter (11) and the hub (5).

6. The new rotary joint as set forth in claim 1, wherein: and a bushing (6) is arranged between the conversion joint (11) and the hub (5).

7. The new rotary joint as set forth in claim 1, wherein: and a hoop (9) is also arranged between the conversion head (11) and the flange pipe (10).