CN113932075B

CN113932075B - Quick loosening and compacting device for flange and operation method thereof

Info

Publication number: CN113932075B
Application number: CN202010666822.9A
Authority: CN
Inventors: 杨宏伟
Original assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2023-05-05
Anticipated expiration: 2040-07-13
Also published as: CN113932075A

Abstract

The invention discloses a quick loosening and compressing device for a flange and an operation method thereof. The device comprises a fixing component (1), a connecting rod (3), a guide seat (5) and a sleeve (6). The fixing component is fixed on the first pipeline (21), the guide seat is fixed on the second pipeline (22), and the guide seat is positioned between the fixing component and the sleeve. The connecting rod passes through the opening or the groove on the guide seat and can slide relative to the opening or the groove. One end of the connecting rod is fixed on the fixed component, and the other end is provided with a connecting block (9) with internal threads. The sleeve is sleeved on the second pipeline, can rotate around the second pipeline and is axially positioned. The sleeve is provided with external threads which are screwed with the internal threads on the connecting block. A manual lever (8) is arranged on the sleeve. The invention discloses an operation method of the device. The invention is generally applicable to small diameter pipes having nominal diameters below DN300 and also to pipes having nominal diameters above DN 300.

Description

Quick loosening and compacting device for flange and operation method thereof

Technical Field

The invention belongs to the technical field of pipeline connecting devices, and relates to a flange quick loosening and compressing device and an operation method thereof.

Background

Flange connection is commonly adopted for connection of fluid conveying pipelines in the field of industrial enterprises and urban public engineering. When it is desired to completely block fluids, or when two fluids of different properties present in interconnecting pipes are absolutely not allowed to cross, various forms of blind plates are typically used for the block. The specific connection form is as follows: the two flanges are oppositely clamped with a blind plate, and the blind plate, the flange and the blind plate are fastened by bolts and nuts. The bolt and nut fastener adopts the standard bolt and nut specification of flange standard configuration.

The flange and the blind plate connected in the mode are generally assembled and disassembled once at least in the startup and shutdown process, and the number of bolts and nuts which are required to be assembled and disassembled is large, so that the time and labor are consumed. Especially, the large-caliber pipeline has heavy workload of one operation, a plurality of bolts and nuts must be removed and installed one by one, and the pretightening force difference of the bolts and nuts must be ensured to be small during the installation. One specific example is: a flange butt clamp blind plate is arranged on an oil gas pipeline connecting a fractionating tower and a settler in the petroleum processing catalytic cracking device, and the fractionating tower and the settler must be disassembled and assembled once every time of startup and shutdown. Because the caliber of the pipeline is large (the nominal diameter is generally DN 400-DN 1200, the unit is millimeter), the number of bolts and nuts is large, and the operation can be completed by many people for a long time, and the efficiency is low.

Chinese patent CN201821979620.4 discloses a pneumatically operated quick-opening blind plate device, which comprises a link mechanism, a screw mechanism, a cylinder and other parts, so that the mechanization of replacing (i.e. transposition) the two ends of the 8-shaped blind plate is realized, and the manual workload is saved. But the device has limited applicability to the operation of blind plates on small diameter pipes (nominal diameter below DN 300) because the device has a relatively complex structure and high engineering cost; there is also a need to address the power source problem of the cylinder, which comes from an external system.

Disclosure of Invention

The invention aims to provide a quick flange loosening and compressing device and an operation method thereof, which are used for solving the problems that the structure of the existing device is complex and an external system power source is required to be used.

In order to solve the problems, the invention adopts the following technical scheme: a quick loosening and compressing device for a flange is characterized in that: the connecting rod is fixed on the fixing member, the connecting rod is provided with an internal thread, the sleeve is sleeved on the second pipeline and can rotate around the second pipeline and be axially positioned, the sleeve is provided with an external thread and screwed with the internal thread on the connecting block, and a manual rod is arranged on the sleeve.

The operation method of the flange quick loosening and compressing device is characterized by comprising the following steps: when the manual lever is pulled, the sleeve rotates around the axial lead of the first pipeline and the second pipeline in the opposite direction to the external threads on the sleeve and the internal threads on the connecting block, the connecting block moves in the direction close to the guide seat, the connecting rod and the fixing member drive the first pipeline to move in the direction away from the second pipeline, so that the first flange and the second flange are loosened, and when the manual lever is pulled, the sleeve rotates around the axial lead of the first pipeline and the second pipeline in the same direction as the external threads on the sleeve and the internal threads on the connecting block, the connecting block moves in the direction away from the guide seat, and the connecting rod and the fixing member drive the first pipeline to move in the direction close to the second pipeline, so that the first flange and the second flange compress the blind plate and the gasket, or compress the gasket.

The invention has the following beneficial effects: the device has simple structure and operation, and can realize the quick disassembly and assembly of the common blind plate and the quick transposition of the 8-shaped blind plate. The device is generally used for small-diameter pipelines with nominal diameters below DN300, can also be used for pipelines with nominal diameters above DN300, and is particularly suitable for the occasion of frequently switching materials. The device of the invention can be manufactured in factories or on site, and can obviously reduce engineering cost. And manual operation is adopted, and an external system power source is not required. The invention is also applicable to occasions where the pipeline is provided with only the flange and no blind plate is provided, and can realize the rapid connection and separation of the two flanges. By adopting the flange bolt and nut tightening device, flange bolt and nuts can be omitted, and the workload of bolt and nut disassembly and tightening is saved.

The invention will be described in further detail with reference to the drawings and the detailed description. The drawings and detailed description are not intended to limit the scope of the invention as claimed.

Drawings

FIG. 1 is a schematic view of the quick release and hold down device of the flange of the present invention mounted to a pipe.

Fig. 2 is a sectional view a-a in fig. 1.

In fig. 1 and 2, the same reference numerals denote the same technical features. Reference numerals denote: 1-a fixing member; 21-a first conduit; 22-a second conduit; 3-connecting rod; 41-a first flange; 42-a second flange; 5, a guide seat; 6, a sleeve; 7-a retainer ring; 8-a manual lever; 9-connecting blocks; 10-blind plate; 11-handle.

Detailed Description

Referring to fig. 1 and 2, the quick release and compression device (simply referred to as device) of the flange of the present invention comprises a fixing member 1, a connecting rod 3, a guide holder 5 and a sleeve 6. The fixing member 1 is fixed on the first pipeline 21, the guide seat 5 is fixed on the second pipeline 22, and the guide seat 5 is positioned between the fixing member 1 and the sleeve 6. The connecting rod 3 passes through and can slide relative to the opening or the groove on the guide seat 5. One end of the connecting rod 3 is fixed on the fixed component 1, the other end is provided with a connecting block 9, the connecting block 9 is fixedly connected with the connecting block 9, and the connecting block 9 is provided with internal threads. The sleeve 6 is externally applied to the second conduit 22, rotatable about the second conduit 22 and axially positionable. The sleeve 6 is provided with external threads which are screwed with internal threads on the connecting block 9. The sleeve 6 is provided with a manual lever 8 along the circumferential direction. The fixing mode can be welding, clamp connection, threaded connection and the like.

A collar 7 may be provided on the second conduit 22, the sleeve 6 being positioned axially between the guide shoe 5 and this collar 7, as shown in figure 1. It is also possible to provide two collars 7 on the second pipe 22, the sleeve 6 being positioned axially between these two collars 7, not shown.

The first pipe 21 and the second pipe 22 are equal in diameter and coaxially arranged. The adjacent ends of the first pipeline 21 and the second pipeline 22 are respectively provided with a first flange 41 and a second flange 42, the first flange 41 and the second flange 42 are oppositely clamped with the blind plate 10, and gaskets are arranged between two sides of the blind plate 10 and the first flange 41 and the second flange 42. The blind plate 10 is provided with a handle 11.

The fixing member 1 and the guide seat 5 can be steel plates, section steel or a combination thereof, and the fixing member 1 and the guide seat 5 shown in fig. 1 are all circular steel plates. The connecting rods 3 are steel pipes or steel bars with circular cross sections, generally 2-8 connecting rods are arranged and uniformly distributed around the first pipeline 21 and the second pipeline 22; the first pipe 21 and the second pipe 22 are provided with a larger number of pipes when the diameters thereof are larger. The connecting block 9 is hollow cylindrical, and the sleeve 6 is cylindrical. The connection block 9 may also be several separate block-shaped members or members of other shapes, not shown. The manual rod 8 is a rod piece and is provided with a plurality of manual rods; the length of the manual lever 8 is determined by the force required for gasket sealing and the average physical effort of the operator. Balls may be provided between the sleeve 6 and the second conduit 22 as shown in figures 1 and 2.

The external thread on the sleeve 6 and the internal thread on the connecting block 9 have the same rotation direction, and are left-handed or right-handed. Referring to fig. 1, a blind plate 10 and a gasket are provided between a first flange 41 and a second flange 42. When the manual lever 8 is pulled to rotate the sleeve 6 around the axes of the first pipe 21 and the second pipe 22 in the opposite direction to the external thread on the sleeve 6 and the internal thread on the connecting block 9, the connecting block 9 moves in the direction approaching the guide seat 5, and the connecting rod 3 and the fixing member 1 drive the first pipe 21 to move in the direction separating from the second pipe 22, so that the first flange 41 and the second flange 42 are loosened. At this time, the handle 11 can be pulled to detach the blind plate 10 and the gasket, or the blind plate 10 and the gasket are assembled, or the blind plate 10 is transposed. All operations of the present invention are performed manually. When the manual lever 8 is pulled to rotate the sleeve 6 around the axes of the first pipe 21 and the second pipe 22 in the same direction as the external thread on the sleeve 6 and the internal thread on the connecting block 9, the connecting block 9 moves in the direction away from the guide seat 5, and the connecting rod 3 and the fixing member 1 drive the first pipe 21 to move in the direction approaching the second pipe 22, so that the first flange 41 and the second flange 42 compress the blind plate 10 and the gasket.

When the manual lever 8 is pulled to rotate the sleeve 6 around the axes of the first and

second pipes

21 and 22 in the opposite direction to the external screw thread on the sleeve 6 and the internal screw thread on the connection block 9 without providing the blind plate 10 and only providing the gasket between the first and

second flanges

41 and 42, the connection block 9 moves in the direction approaching the guide holder 5, and the first pipe 21 is driven to move in the direction separating from the second pipe 22 by the link 3 and the fixing member 1, so that the first and

second flanges

41 and 42 are released. When the manual lever 8 is pulled to rotate the sleeve 6 around the axes of the first pipeline 21 and the second pipeline 22 in the same direction as the external thread on the sleeve 6 and the internal thread on the connecting block 9, the connecting block 9 moves in the direction away from the guide seat 5, the connecting rod 3 and the fixing member 1 drive the first pipeline 21 to move in the direction approaching the second pipeline 22, and the first flange 41 and the second flange 42 can be jointed, press gaskets and realize sealing.

Claims

1. A quick loosening and compressing device of a flange is used for quickly loosening and compressing a first flange (41) and a second flange (42), the first flange (41) and the second flange (42) are respectively arranged at the adjacent end parts of a first pipeline (21) and a second pipeline (22), the diameters of the first pipeline (21) and the second pipeline (22) are equal and coaxially arranged, the quick loosening and compressing device of the flange is provided with a sleeve (6) and a connecting block (9), the connecting block (9) is provided with internal threads, the sleeve (6) is sleeved on the second pipeline (22) and can rotate around the second pipeline (22) and is axially positioned, the sleeve (6) is provided with external threads and is screwed with the internal threads on the connecting block (9), and a manual rod (8) is arranged on the sleeve (6), and the quick loosening and compressing device is characterized in that: the quick loosening and compacting device for the flange is further provided with a fixing member (1), a connecting rod (3) and a guide seat (5), wherein the fixing member (1) is fixed on the first pipeline (21), the guide seat (5) is fixed on the second pipeline (22), the guide seat (5) is positioned between the fixing member (1) and the sleeve (6), the connecting rod (3) penetrates through a hole or a groove in the guide seat (5) and can slide relative to the hole or the groove, one end of the connecting rod (3) is fixed on the fixing member (1), and the other end of the connecting rod is fixedly connected with the connecting block (9).

2. The apparatus according to claim 1, wherein: the second pipe (22) is provided with a check ring (7), and the sleeve (6) is axially positioned between the guide seat (5) and the check ring (7).

3. The apparatus according to claim 1, wherein: the second pipe (22) is provided with two check rings (7), and the sleeve (6) is axially positioned between the two check rings (7).

4. The apparatus according to claim 1, wherein: a ball is arranged between the sleeve (6) and the second pipeline (22).

5. The apparatus according to any one of claims 1 to 4, wherein: 2-8 connecting rods (3) are arranged.

6. A method of operating a quick release and hold down device for a flange as claimed in claim 1, comprising the steps of: when the manual lever (8) is pulled, the sleeve (6) rotates around the axes of the first pipeline (21) and the second pipeline (22) in the direction opposite to the external thread on the sleeve (6) and the internal thread on the connecting block (9), the connecting block (9) moves in the direction approaching the guide seat (5), the first pipeline (21) is driven to move in the direction approaching the second pipeline (22) through the connecting rod (3) and the fixing member (1), the first flange (41) and the second flange (42) are loosened, and when the manual lever (8) is pulled, the sleeve (6) rotates around the axes of the first pipeline (21) and the second pipeline (22) in the same direction as the external thread on the sleeve (6) and the internal thread on the connecting block (9), the connecting block (9) moves in the direction approaching the second pipeline (22) through the connecting rod (3) and the fixing member (1), and the first flange (41) is driven to move in the direction approaching the second pipeline (22), and the first flange (41) and the second flange (42) are compressed or the gasket is compressed.