CN209587410U - An active flange and an easily disassembled flange connection structure - Google Patents

Abstract

The utility model relates to the technical field of flange plate connection structures, in particular to an active flange plate and an easily disassembled flange plate connection structure. The connection structure includes a passive flange plate and an active flange plate that match each other; The outer dimensions of the flange and the active flange are the same; the center of the passive flange and the active flange is provided with a circular communication hole, and the installation contact end faces of the passive flange and the active flange are correspondingly provided with an annular water hole. There is an outwardly protruding arc-shaped convex ring between the water line and the communication hole; there are multiple circular fixing holes in a circular array around the outer edge of the passive flange; the outer edge of the active flange is simultaneously There are multiple circular fixing holes and threaded holes in the circular array, and the diameter of the threaded holes is larger than that of the fixing holes; the positions of the fixing holes on the passive flange correspond to the positions of the fixing holes and the screw holes on the active flange . The utility model is easy to install and disassemble, and has good practical value and popularization value.

Description

An active flange and an easily disassembled flange connection structure

technical field

The utility model relates to the technical field of flange plate connection structures, in particular to an active flange plate and an easily detachable flange plate connection structure.

Background technique

In the daily construction process of petroleum, chemical, gas, water supply pipelines, etc., the connection between pipe ends, the connection between two equipment, and the connection between pipe and equipment all need to be connected with each other by flanges, gaskets and bolts. The detachable connection of the combined sealing structure. There are light holes on the flange, and the two flanges are tightly connected by screw bolts, and the flanges are sealed with gaskets.

In the prior art, when the newly-built pipeline equipment is usually connected to the original pipeline, in order to conduct an airtight test on the newly-built pipeline equipment, a "blind plate" must be installed between the two flanges at the connection. The blind plate is mainly used to isolate the newly-built pipeline facilities from the original pipeline facilities, so as to prevent the leakage of the production medium in the pipeline facilities due to the lax shut-off of the shut-off valves on the original pipeline facilities, resulting in inestimable accidents. However, the existing sealing methods and structures usually have some problems during specific use, specifically:

The blind plate is usually set at the interface where isolation is required, such as at the port of the equipment, before and after the cut-off valve or between two flanges. it's the same. Due to its good sealing performance, it is generally used as a reliable means of isolation for systems that require complete isolation. When the blind plate is inserted between the two flanges, the inner circle of the flanges will have a waterline, which can be tightened with the blind plate, which is conducive to sealing.

After the connecting flanges are connected by blind plates and bolts for a period of time, it is relatively difficult to disassemble the two connected flanges. The reason is that due to the effect of fastening stress, the two flanges at the joint of the old and new pipeline facilities are close together, and it is very difficult to install or remove the blind plate from it. The method that is often used at present is to remove the flange bolts, use a crowbar to pry open the two flanges at the joint, add or remove the blind plate and gasket from the gap between the flanges; Reinstall the flange bolts. Adopting this method is less safe, and when using the sledge bar to sled the flange, it is easy to cause bodily injury to the operator due to slipping, and secondly, more than two people need to cooperate to operate with high labor intensity, and the operation time is long and the efficiency is low.

Another method is to install support bodies at both ends of the old and new facilities, and use hydraulic jacks to open the gap between the two flanges to install and disassemble the blind plate. The safety of this method is greatly improved, but the whole operation time is too long and the efficiency is too low, and the input equipment is large, the cost is high, and the economy is poor.

Therefore, based on the above, the utility model provides an active flange and a flange connection structure that is easy to disassemble. During the construction process, it can not only ensure a good sealing installation effect, but also facilitate the disassembly and installation of the blind plate during the process of disassembling the blind plate, improve the efficiency of blind plate installation and disassembly, reduce the cost of disassembly operation, and thus solve the problem of existing technical problems. There are deficiencies and defects.

Utility model content

The purpose of this utility model is to provide an active flange and a flange connection structure that is easy to disassemble in view of the above-mentioned problems currently existing. In the specific connection installation and construction process, the blue plate can not only ensure a good sealing installation effect, but also facilitate the disassembly and installation of the blind plate during the process of disassembling the blind plate, improve the efficiency of blind plate installation and disassembly, and reduce the disassembly operation. cost, and then solve the deficiencies and defects in the existing technology.

In order to achieve the above object, the technical solution adopted by the utility model is:

An easily disassembled flange connection structure is characterized in that: it includes a passive flange and an active flange that match each other; the external dimensions of the passive flange and the active flange are the same; the passive flange and the active flange The central position of the active flange is provided with a circular communication hole, and the installation contact end surface of the passive flange and the active flange is correspondingly provided with an annular waterline, and an outwardly protruding arc is provided between the waterline and the communication hole. Protruding ring; the outer edge of the passive flange is provided with a plurality of circular fixing holes in a circular array; the outer edge of the active flange is simultaneously provided with a plurality of circular fixing holes and threaded holes in a circular array , the aperture of the threaded hole is larger than the aperture of the fixing hole, and the size of the fixing hole on the active flange is the same as that on the passive flange; the position of the fixing hole on the passive flange is the same as that of the fixing hole on the active flange and One-to-one correspondence with threaded hole positions;

The outer ends of the active flange and the passive flange are fixedly welded and installed with connecting pipes; when the active flange and the passive flange are connected and installed, a joint is added between the active flange and the passive flange. A blind plate is installed, and gaskets are arranged on both sides of the blind plate; the active flange and the passive flange are fixedly connected through a fixing component.

An active flange, the array of the active flange is provided with a plurality of circular fixing holes and a plurality of circular threaded holes; the diameter of the threaded holes is greater than the diameter of the fixing hole; the active flange A circular communication hole is provided at the central position, and an annular waterline is correspondingly provided on the installation end surface of the active flange, and an outwardly protruding arc-shaped convex ring is provided between the waterline and the communication hole.

Preferably, the number of threaded holes provided on the active flange is greater than or equal to two, and the threaded holes are symmetrically arranged on the active flange.

Preferably, the protruding top of the arc-shaped protruding ring has a circular arc-shaped structure, and the protruding height of the arc-shaped protruding ring is smaller than the concave depth of the waterline.

Preferably, the shape of the waterline is an annular groove structure recessed toward the inside of the flange; the bottom surface of the waterline is an arc-shaped concave surface recessed inward.

Preferably, the fixing assembly includes bolts and nuts that match each other; when the active flange and the passive flange cooperate with each other for fixed installation, the bolts pass through the fixing holes of the two flanges as a whole; the thread of each bolt The segments are fixed with mounting nuts.

Preferably, the blind plate includes a plate body and a triangular pointed block; the overall shape of the plate body is a circular plate structure, and the outer diameter of the circular profile of the plate body is larger than the outer diameter of the waterline and smaller than the fixed hole or threaded hole. The diameter of the inner circle; the circular edge of the plate protrudes outwards to set a pointed block; the pointed block and the plate body are integrated, and the tip of the pointed block is provided with a rounded corner structure; the shape of the gasket on both sides of the blind plate It is a circular structure, and the diameter of the gasket is equal to the diameter of the circular plate body of the blind plate; the gasket is a sealing rubber sheet.

Preferably, the materials of the active flange and the passive flange are steel, the active flange, the passive flange are connected to the inner holes of the connecting pipe, and the diameter of the connecting pipe hole is equal to the diameter of the connecting hole .

Preferably, the outer edge corners of the active flange and the passive flange are all provided with rounded corners; the inner wall of the fixing hole is a smooth wall.

It should be noted that when the active flange and the passive flange are fixedly installed, gaskets are installed on both sides of the blind plate, and when the two flanges are fastened and installed, the gasket is squeezed and embedded in the waterline After the installation of the blind plate is realized, the pipes connected at both ends of the flange are blocked and sealed.

In the specific implementation process, under the original technical standards, at least 2 original symmetrical light holes on the flange were changed to threaded holes, and the diameter was increased by one level on the basis of the original specification (for example, the light hole with a diameter of 18mm was adjusted to 20mm screw holes, and so on), the number of threaded holes is also adjusted accordingly with the size of the flange.

The specific operation method of this application:

When installing the flange, the traditional passive flange is installed on one side, and the active flange with threaded holes is installed on the other side. The installation method remains the same, and bolts and nuts are used to fix the connection; When installing and removing the blind plate or sealing gasket between the plates, after removing all the fastening bolts, the two flange plates are tightly connected together due to stress or rust. In this case, the operator only needs to install bolts or screws with the same specifications in the screw holes on the active flange. With the screw feeding of the bolts or screws, the passive flange on the opposite side of the active flange will be The plate generates force, so that a certain gap space is opened between the two flange plates through bolts or screws, until it is enough to meet the needs of the installation and disassembly of the blind plate and the gasket.

The outer diameter of the blind plate covers the connecting hole between the two flanges, and at the same time, the outer diameter of the blind plate is larger than the outer diameter of the waterline, and smaller than the inner diameter of the ring formed by multiple fixing holes or threaded holes, that is, the blind plate The circular plate body cannot block the fixing holes and threaded holes, otherwise the screws or bolts used to assist disassembly cannot pass through the threaded holes, which will affect the operation of disassembling the flange. The purpose of the diameter of the threaded hole being larger than the diameter of the fixing hole is that when the screw or bolt matching the threaded hole passes through the threaded hole and the passive flange is pushed away, the screw or bolt will not be embedded in the passive flange. Corresponding to the fixing hole, it is so convenient for the push-off operation of the passive flange.

In this application, there are at least two threaded holes on the active flange, preferably four, and the two threaded holes are mutually symmetrical. In fact, two threaded holes are selected based on the original fixed holes of the active flange. The symmetrical fixed holes are reamed to form threaded holes. Therefore, after the threaded holes are formed, the positions of the center of the holes remain unchanged, and the threaded holes correspond to the positions of the fixed holes provided on the passive flange.

Owing to adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

In the specific use process of the utility model, the user directly uses bolts or screws to open the gap between the two flanges, leaving a certain space, so that it is convenient for the workers to install the blind plate and the gasket into the gap space; it is also convenient After opening a certain gap space, the worker uses an external clamping tool to clamp the blind plate or gasket to disassemble and take it out. Compared with traditional technical solutions, this technical solution has the following advantages:

Compared with the traditional method of using a crowbar to pry the flange, it is relatively labor-saving. The operator does not need to spend a lot of labor to pry the flange, but uses external auxiliary tools, such as a labor-saving wrench to rotate the bolt or screw. Open a gap between the two flanges for installing or removing the blind plate. In this way, the present application can guarantee the safety of operators to a large extent. When using a sledge bar to sled the flange, it is easy to cause physical injury to the operator due to slipping, and secondly, more than two people need to cooperate with the operation, which is labor-intensive, and the operation time is long and the efficiency is low. However, the above-mentioned problems do not exist in the present application, which not only reduces labor intensity, but also improves work efficiency.

At the same time, compared with the operation plan of installing support bodies at both ends of the old and new pipeline facilities, using a hydraulic jack to open the gap between the two flanges, and installing and disassembling the blind plate, this application can also ensure better safety. , and the operating efficiency is relatively high, no need to use jacks and other equipment, its operation and construction costs are relatively low, and it has good economy.

Therefore, the utility model not only facilitates the sealing connection and installation of flanges, but also has high efficiency and low cost, and has good practical value and popularization value.

Description of drawings

Fig. 1 is the structural representation of passive flange plate of the present utility model;

Fig. 2 is the schematic diagram of the structure of the connecting surface of the passive flange of the present invention;

Fig. 3 is the schematic diagram of the structure of the active flange of the present invention;

Fig. 4 is a structural schematic diagram of a passive flange and an active flange of the present invention;

Fig. 5 is a structural schematic diagram of the blind plate and gasket of the present invention.

In the figure: 1. Passive flange; 2. Connecting hole; 3. Fixing hole; 4. Waterline; 5. Arc convex ring; 6. Active flange; 7. Threaded hole; 8. Blind plate; 9 , fixed components; 10, connecting pipe; 11, sharp block; 12, gasket.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the present invention. The scope of utility model protection.

Example 1, as shown in Figure 1-5:

An easily detachable flange connection structure, including a passive flange 1 and an active flange 6 that match each other; the passive flange 1 and the active flange 6 have the same dimensions; the passive flange 1 A circular communication hole 2 is opened at the center of the active flange 6, and an annular water line 4 is opened corresponding to the installation contact end surface of the passive flange 1 and the active flange 6, and the water line 4 is set between the communication hole 2 There is an outwardly protruding arc-shaped convex ring 5; a circular array around the outer edge of the passive flange 1 is provided with a plurality of circular fixing holes 3; the outer edge of the active flange 6 is circular at the same time. The array is provided with a plurality of circular fixing holes 3 and threaded holes 7, and the aperture of the threaded holes 7 is larger than the aperture of the fixing holes 3; The positions of hole 3 and threaded hole 7 correspond one by one;

The outer ends of the active flange 6 and the passive flange 1 are all fixedly welded with connecting pipes 10; when the active flange 6 and the passive flange 1 are connected and installed, the active flange 6 and the passive A blind plate 8 is arranged between the flanges 1 , and gaskets 14 are provided on both sides of the blind plate 8 ; the active flange 6 and the passive flange 1 are fixedly connected by a fixing assembly 9 .

An active flange, the active flange 6 is provided with a plurality of circular fixing holes 3 and a plurality of circular threaded holes 7; the diameter of the threaded holes 7 is greater than the diameter of the fixing hole 3; The central position of the active flange 6 is provided with a circular communication hole 2, and the installation end surface of the active flange 6 is correspondingly provided with an annular water line 4, and an outwardly protruding arc is provided between the water line 4 and the communication hole 2. convex ring 5.

Preferably, the number of threaded holes 7 provided on the active flange 6 is greater than or equal to two, and the threaded holes 7 are symmetrically arranged on the active flange 6 .

Preferably, the protruding top of the arc-shaped protruding ring 5 has a circular arc structure, and the protruding height of the arc-shaped protruding ring 5 is smaller than the concave depth of the waterline 4 .

Preferably, the shape of the water line 4 is an annular groove structure recessed toward the inside of the flange; the bottom surface of the water line 4 is an arc-shaped concave surface recessed inward.

Preferably, the fixing assembly 9 includes bolts and nuts that match each other; when the active flange 6 and the passive flange 1 are fixedly installed in cooperation with each other, the bolts pass through the fixing holes 3 of the two flanges as a whole, and each The threaded sections of the root bolts are fixed with the mounting nuts.

Preferably, the blind plate 8 includes a plate body and a triangular pointed block 11; the overall shape of the plate body is a circular plate structure, and the outer diameter of the circular profile of the plate body is larger than the outer diameter of the waterline, and smaller than the fixing hole or screw thread The diameter of the inner circle formed by the hole; the circular edge of the plate body protrudes outwards to set a pointed block; the pointed block and the plate body are integrated, and the tip of the pointed block is provided with a rounded corner structure; the pads on both sides of the blind plate The shape of the sheet is a circular structure, and the diameter of the gasket is equal to the diameter of the blind plate body; the gasket is a sealing rubber sheet or a sealing silicone sheet.

The shape of the gaskets 12 on both sides of the blind plate 8 matches the profile of the body of the blind plate 8; the shape of the gaskets on both sides of the blind plate is a circular structure, and the diameter of the gasket is equal to the diameter of the body of the blind plate The blind plate 8 includes a plate body and a triangular pointed block 11; the overall shape of the plate body is a circular plate structure, and the outer diameter of the circular profile of the plate body is greater than the outer diameter of the waterline 4, and is smaller than the fixing hole 3 or the screw thread The diameter of the inner circle formed by the hole 7; the circular edge position of the plate protrudes outwards to set the pointed block 11; the pointed block 11 is integrated with the plate body, and the tip of the pointed block 11 is provided with a rounded corner structure.

Preferably, the materials of the active flange 6 and the passive flange 1 are steel, the active flange 6, the passive flange 1 are connected to the inner holes of the connecting pipe 10, and the diameter of the pipe hole of the connecting pipe 10 is It is equal to the diameter of the communicating hole 2.

Preferably, the outer corners of the active flange 6 and the passive flange 1 are all provided with rounded corners; the inner wall of the fixing hole 3 is a smooth wall.

It should be noted that when the active flange 6 and the passive flange 1 are fixedly installed, the active flange 6 and the passive flange 1 on both sides of the blind plate 8 will be tightened under the action of the tightening extrusion force. The gasket 12 is embedded in the waterline 4, and after the blind plate 8 is installed, the pipes connected at both ends of the flange are blocked and sealed.

In the specific implementation process, under the original technical standards, the original two symmetrical fixing holes 3 on the flange were changed to threaded holes 7, and the diameter was increased by one level on the basis of the original specification (for example, the original fixed hole with a diameter of 18mm 3 is adjusted to 20mm threaded hole 7, and so on), the number of threaded holes 7 is adjusted accordingly with the size of the flange plate, the number of threaded holes 7 increases with the increase of the size of the active flange, and the thread The number of holes 7 is an even number, and the set threaded holes are symmetrical about the central axis of the active flange.

The outer diameter of the blind plate 8 covers the connecting hole 2 in the middle of the two flanges, and the outer diameter of the blind plate 8 is larger than the outer diameter of the waterline 4, and smaller than the inner diameter of the ring formed by the plurality of fixing holes 3 or threaded holes 7 , that is, the circular plate body of the blind plate 8 cannot block the fixing hole 3 and the threaded hole 7, otherwise the screw rod or bolt used to assist disassembly cannot pass through the threaded hole 7, which will affect the operation of disassembling the flange.

In this application, there are at least two threaded holes 7 provided on the active flange 6, and the two threaded holes 7 are mutually symmetrical. The fixed hole 3 is reamed to form a threaded hole 7, so after the threaded hole 7 is formed, the position of the center of the hole remains unchanged, and the threaded hole 7 can still correspond to the fixed hole provided on the passive flange 1.

The specific operation method of this application:

When installing the flange, the traditional passive flange 1 is installed on one side, and the active flange 6 with threaded holes 7 is installed on the other side. The installation method remains the same, and the bolts and nuts are used for fixed connection; When installing or removing the blind plate 8 or sealing gasket 12 between the flanges, after removing all the fastening bolts, the two flanges are tightly connected together due to stress or rust. . In this case, the operator only needs to install bolts or screw rods with the same specifications in the threaded holes 7 on the active flange 6, and along with the screw feed of the bolts or screw rods, the opposite side of the active flange 6 will be The passive flange 1 generates a force, so that a certain gap space is opened between the two flanges through bolts or screws, until it is enough to meet the requirements of the installation and disassembly of the blind plate 8 and the gasket 12 . And through the improvement of the structure of the blind plate 8, an outwardly protruding triangular pointed block 11 is set, which can facilitate the operator to directly clamp the pointed block 11 with an external clamping tool when disassembling or installing the blind plate 8, so that the The blind plate 8 is put into the gap between the two flanges, or removed from the gap between the flanges, which is convenient for workers to install and disassemble.

In the specific use process of the utility model, the user directly uses bolts or screw rods to spread between the two flanges, leaving a certain space, so that it is convenient for workers to install the blind plate 8 and the gasket 12 into the gap space; It is convenient for workers to use an external clamping tool to clamp the blind plate 8 or the gasket 12 for disassembly and removal after opening a certain gap space. Compared with traditional technical solutions, this technical solution has the following advantages:

Compared with the traditional method of using a crowbar to pry the flange, it is relatively labor-saving. The operator does not need to spend a lot of labor to pry the flange, but uses external auxiliary tools, such as a labor-saving wrench to rotate the bolt or screw. Open a gap between the two flanges for installing or removing the blind plate 8 . In this way, the present application can guarantee the safety of operators to a large extent. When using a sledge bar to sled the flange, it is easy to cause bodily injury to the operator due to slipping. Secondly, more than two people are required to cooperate with the operation. Labor intensity, but also improve work efficiency.

At the same time, compared with the operation plan of installing support bodies at both ends of the old and new pipeline facilities, using hydraulic jacks to open the gap between the two flanges, and installing and disassembling the blind plate 8, this application can also ensure better safety. It is flexible, and the operating efficiency is relatively high. It does not need to use jacks and other equipment. Its operation and construction costs are relatively low, and it has good economy.

Therefore, the utility model not only facilitates the sealing connection and installation of flanges, but also has high efficiency and low cost, and has good practical value and popularization value.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed in the present utility model. Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1. An active flange, characterized in that: arrays on the active flange are provided with a plurality of circular fixing holes and a plurality of circular threaded holes; the diameter of the threaded holes is greater than the diameter of the fixing hole; The central position of the active flange is provided with a circular communication hole, and the installation end surface of the active flange is correspondingly provided with an annular waterline, and an outwardly protruding arc-shaped convex ring is provided between the waterline and the communication hole. 2. The active flange according to claim 1, characterized in that: the number of threaded holes provided on the active flange is greater than or equal to 2, and the threaded holes are symmetrically arranged on the active flange. 3. The active flange according to claim 1, characterized in that: the protruding top of the arc-shaped protruding ring is a circular arc-shaped structure, and the protruding height of the arc-shaped protruding ring is smaller than the concave depth of the waterline . 4. The active flange according to claim 1, characterized in that: the shape of the waterline is an annular groove structure sunken toward the inside of the flange; the bottom surface of the waterline is an arc-shaped concave surface sunken inward. 5. An easily detachable flange connection structure, characterized in that: it includes a passive flange and an active flange that match each other, and the active flange is the active flange described in any one of claims 1-4. Flange; the external dimensions of the passive flange and the active flange are the same; a circular communication hole is provided at the center of the passive flange and the active flange, and the installation of the passive flange and the active flange An annular waterline is correspondingly provided on the contact end surface, and an outwardly protruding arc-shaped convex ring is provided between the waterline and the communication hole; a plurality of circular fixing holes are provided in a circular array around the outer edge of the passive flange; A plurality of circular fixing holes and threaded holes are provided in a circular array around the outer edge of the active flange, and the diameter of the threaded holes is larger than that of the fixing holes. The size of the fixing hole is the same; the position of the fixing hole on the passive flange corresponds to the position of the fixing hole and the threaded hole on the active flange; The outer ends of the active flange and the passive flange are fixedly welded and installed with connecting pipes; when the active flange and the passive flange are connected and installed, a joint is added between the active flange and the passive flange. A blind plate is installed, and gaskets are arranged on both sides of the blind plate; the active flange and the passive flange are fixedly connected through a fixing component. 6. The easy-to-detach flange connection structure according to claim 5, characterized in that: the fixing assembly includes bolts and nuts that match each other; when the active flange and the passive flange cooperate with each other for fixed installation , the bolts pass through the fixing holes of the two flanges as a whole; the threaded section of each bolt is fixed with the mounting nut. 7. The easily disassembled flange connection structure as claimed in claim 5, characterized in that: the blind plate includes a plate body and a triangular pointed block; the overall shape of the plate body is a circular plate structure, and the circle of the plate body The outer diameter of the shape profile is larger than the outer diameter of the waterline, and smaller than the inner diameter of the fixed hole or the threaded hole; The tip of the block is provided with a rounded corner structure; the shape of the gasket on both sides of the blind plate is a circular structure, and the diameter of the gasket is equal to the diameter of the circular plate body of the blind plate; the gasket is a sealing rubber piece. 8. The easily detachable flange connection structure as claimed in claim 5, characterized in that: the materials of the active flange and the passive flange are all steel, and the active flange, the passive flange and the connection The inner holes of the pipes are connected to each other, and the diameter of the pipe holes of the connecting pipes is equal to the diameter of the communicating holes. 9. The easily detachable flange connection structure as claimed in claim 5, characterized in that: the outer edge corners of the active flange and the passive flange are all provided with rounded corners; The inner wall of the circular hole is smooth.