A flange plate convenient to replace

Abstract

The utility model relates to the technical field of flange plate discloses a flange plate convenient to replace, including the inside setting of flange plate body has the socket hole, the outside processing of socket hole has the external thread, the inside processing of flange plate body has the internal thread, and the external thread is connected in the internal thread inside thread type, and one end of socket hole is provided with the sealing surface, and the sealing surface is located one side of flange plate body, through making two flange plate body separate, then rotates the flange plate body of waiting to replace and keeps away from the sealing surface, then uses cutting equipment to cut sealing surface, after cutting, takes down and replaces the new flange plate body, uses the new welding ring and welds the sealing surface in socket hole one end, then rotates flange plate body, makes it and the sealing surface one side close adhesion, finally fixes two flange plate body through the thread column and nut again, whole replacement process does not need cutting or destroying the pipeline, and the operation is simple and efficient, can effectively reduce the influence to the pipeline system.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically to a flange that is easy to replace. Background Technology

[0002] A flange is a disc-shaped metal connector, named after the English word "flange". Its core function is to enable detachable connection of components such as pipes, valves, and equipment through the surrounding bolt holes and the mating of the gasket. It has structural stability and sealing performance. According to the structure, it can be divided into various types such as flat welding, butt welding, and threaded. The sealing surface design includes flat, raised face and other forms to adapt to different media environments.

[0003] As a core component for connecting pipelines and equipment, flanges inevitably suffer damage during long-term use due to factors such as media corrosion, temperature changes, vibration, and impact. This damage can lead to issues like wear on the sealing surface, deformation of bolt holes, and cracks in the flange body. Timely replacement is crucial to ensure safe system operation. From steam pipelines and chemical media transport pipelines in industrial production to water and heating pipelines in municipal engineering, and even the connection points of mobile or outdoor equipment such as ships and wind power plants, the efficiency of flange replacement directly affects system downtime, maintenance costs, and production continuity. For example, if a reactor flange in a chemical plant needs replacement due to corrosion and leakage, an excessively long replacement time can lead to the spoilage of materials inside the reactor, resulting in losses of tens of thousands of yuan. Similarly, replacing tower flanges in wind power equipment during high-altitude operations directly impacts construction safety and project schedule due to the ease of operation required.

[0004] In existing technologies, flanges are usually fixedly welded to pipes or connecting components. If the flange body is damaged and needs to be replaced, it is often necessary to cut the entire connection structure between the flange and the pipe, or even cut off part of the pipe to remove the old flange. After cutting, the pipe needs to be re-welded to ensure that the pipe reaches the required length so as not to affect the pipe connection. Welding the pipe may affect the original sealing and structural strength of the pipe. At the same time, it will cause the pipeline system to be forced to shut down for a long time, especially for continuous operation systems such as industrial production, water supply and gas supply, resulting in huge losses.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing flanges. Utility Model Content

[0006] To address the technical problem that existing flange replacements often require cutting the entire connection between the flange and the pipeline, or even severing part of the pipeline, to remove the old flange, and then re-welding the pipeline after cutting, this utility model provides a flange that is easy to replace.

[0007] This utility model is achieved using the following technical solution: a replaceable flange, comprising a flange body, wherein a socket hole is provided inside the flange body, external threads are machined on the outside of the socket hole, internal threads are machined on the inside of the flange body, the external threads are threadedly connected to the internal threads, a sealing surface is provided at one end of the socket hole, the sealing surface is located on one side of the flange body, and multiple bolt holes are provided around the flange body, threaded posts are provided inside the bolt holes, and two nuts are threadedly connected to both ends of the threaded posts.

[0008] Preferably, the outer diameter of the sealing surface is larger than the inner diameter of the flange body, and the inner diameter of the sealing surface is the same as the inner diameter of the socket.

[0009] Preferably, a welding ring is welded to one end of the socket, and the welding ring is welded to the inner side of the sealing surface. Since the sealing surface and the socket are fixed by welding with a narrow welding ring, the narrow welding ring can greatly reduce the cutting difficulty and improve the cutting efficiency.

[0010] Preferably, a pipe is inserted into the inside of the socket, and the pipe is welded to the outer end of the socket.

[0011] Preferably, when the two flange bodies are connected and fixed, a sealing ring is provided between the two flange bodies.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In use, this invention involves first disassembling the threaded post and nut to separate the two flange bodies. Then, the flange body to be replaced is rotated away from the sealing surface. The sealing surface is then cut off using a cutting device. After cutting, the flange body is rotated again to easily remove it from the socket and replace it with a new flange body. The new flange body is rotated to the corresponding position outside the socket, and a new welding ring is used to weld the sealing surface to one end of the socket. The flange body is then rotated to ensure a tight fit with one side of the sealing surface. Finally, the two flange bodies are re-secured using the threaded post and nut. The entire replacement process requires no cutting or damage to the pipeline, is simple and efficient, and effectively reduces the impact on the pipeline system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a side view of the flange body of this utility model;

[0016] Figure 3 This is an exploded view of the flange body of this utility model.

[0017] In the diagram: 1. Flange body; 2. Socket; 3. Sealing surface; 4. Threaded post; 5. Nut; 6. Internal thread; 7. External thread; 8. Welding ring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] Example 1: Please refer to Figure 1 - Figure 3 This embodiment of a replaceable flange includes a flange body 1 with a socket hole 2 inside, an external thread 7 machined on the outside of the socket hole 2, an internal thread 6 machined on the inside of the flange body 1, the external thread 7 being threadedly connected to the internal thread 6, a sealing surface 3 being provided at one end of the socket hole 2, the sealing surface 3 being located on one side of the flange body 1, multiple bolt holes being provided around the flange body 1, threaded posts 4 being provided inside the bolt holes, and two nuts 5 being threadedly connected to both ends of the threaded posts 4, and a sealing ring being provided between the two flange bodies 1 when the two flange bodies 1 are connected and fixed.

[0020] In actual installation, the pipe must first be inserted into the socket 2 to ensure that the outer wall of the pipe is tightly fitted with the inner wall of the socket 2. Then, an annular fillet weld is welded at the connection between the flange and the pipe using an electric welding machine to form a firm connection between the flange and the pipe. When connecting two flange bodies 1, a suitable sealing ring must be placed between them. Then, several threaded posts 4 are passed through the corresponding bolt holes of the two flange bodies 1 one by one. Finally, nuts 5 are tightened at both ends of the threaded posts 4. The sealing connection of the two flange bodies 1 is achieved through the tightening action of the bolts and nuts.

[0021] Secondly, if the flange body 1 needs to be replaced, the replacement process is more convenient: First, remove the nuts 5 at both ends of the threaded post 4, and take out all the threaded posts 4 in sequence to separate the two flange bodies 1; then rotate the flange body 1 to be replaced so that it rotates around the outside of the socket 2 to the side away from the sealing surface 3. At this time, the sealing surface 3 can be cut off using a cutting device. Since the sealing surface 3 and the socket 2 are fixed by a narrow welding ring 8, the narrow welding ring 8 can greatly reduce the cutting difficulty and improve the cutting efficiency. After cutting, rotate the flange again. This flange body 1 can be easily removed from the socket 2 and replaced with a new flange body 1. After replacement, rotate the new flange body 1 to the corresponding position outside the socket 2, and weld the sealing surface 3 to one end of the socket 2 with a new welding ring 8 to limit the new flange body 1. Then rotate the flange body 1 to make it fit tightly against the sealing surface 3. Finally, fix the two flange bodies 1 again with the threaded post 4 and nut 5. The entire replacement process does not require cutting or damaging the pipeline, and the operation is simple and efficient, which can effectively reduce the impact on the pipeline system.

[0022] Furthermore, the outer diameter of the sealing surface 3 is larger than the inner diameter of the flange body 1, the inner diameter of the sealing surface 3 is the same as the inner diameter of the socket 2, and one side of the sealing surface 3 fits against one side of the flange body 1, thereby forming a seal.

[0023] Furthermore, a welding ring 8 is welded to one end of the socket 2. The welding ring 8 is welded to the inner side of the sealing surface 3. By providing the welding ring 8, the width of the welding ring 8 is small, which facilitates the cutting and welding of the sealing surface 3.

[0024] Working principle: When it is necessary to replace flange body 1, first remove the threaded post 4 and nut 5 to separate the two flange bodies 1. Then rotate flange body 1 so that it rotates around the outside of the socket 2, so that the flange body 1 is away from the sealing surface 3. Then cut off the sealing surface 3 with a cutting device. After cutting, rotate flange body 1 again to facilitate the removal and replacement of the old flange body 1. After replacement, rotate the new flange body 1 to the outside of the socket 2. Then use a new welding ring 8 to weld the sealing surface 3 to one end of the socket 2 so that the flange body 1 rotates and contacts and fits against the side of the sealing surface 3. Finally, fix the two flange bodies 1 together with the threaded post 4 and nut 5. The entire replacement process does not require cutting or damaging the pipeline. The operation is simple and efficient and can effectively reduce the impact on the pipeline system.

[0025] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A replaceable flange, comprising a flange body (1), characterized in that, The flange body (1) has a socket hole (2) inside, and the socket hole (2) is machined with an external thread (7). The flange body (1) is machined with an internal thread (6). The external thread (7) is threadedly connected to the internal thread (6). One end of the socket hole (2) is provided with a sealing surface (3). The sealing surface (3) is located on one side of the flange body (1). Multiple bolt holes are opened around the flange body (1). The bolt holes are provided with threaded posts (4). The two ends of the threaded posts (4) are threadedly connected to two nuts (5).

2. The easily replaceable flange according to claim 1, characterized in that, The outer diameter of the sealing surface (3) is greater than the inner diameter of the flange body (1), and the inner diameter of the sealing surface (3) is the same as the inner diameter of the socket (2).

3. The easily replaceable flange according to claim 1, characterized in that, One end of the socket (2) is welded to a welding ring (8), which is welded to the inner side of the sealing surface (3).

4. The easily replaceable flange according to claim 1, characterized in that, A pipe is inserted into the inside of the socket (2), and the pipe is welded to the outer end of the socket (2).

5. The easily replaceable flange according to claim 1, characterized in that, When the two flange bodies (1) are connected and fixed, a sealing ring is provided between the two flange bodies (1).

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