Pipeline flange connector

Abstract

The utility model discloses a pipeline flange interface which comprises a first flange plate and a second flange plate, a first outer cylinder is arranged at one end of the first flange plate, a second outer cylinder is arranged at one end of the second flange plate, the first outer cylinder is fixedly welded with a first pipeline, a second outer cylinder sleeve is fixedly welded with a second pipeline, and a first connecting sleeve is arranged at the other end of the first flange plate. A second connecting sleeve is arranged at the other end of the second flange plate, the first flange plate and the second flange plate are in butt joint through a bolt, and the first connecting sleeve sleeves the outer side of the second connecting sleeve; the first connecting sleeve and the second connecting sleeve are arranged, and the first connecting sleeve is arranged on the outer side of the second connecting sleeve in a sleeving mode, so that when a bolt is slightly loosened, the first connecting sleeve and the second connecting sleeve generate trace axis displacement, gaps cannot be generated between the first connecting sleeve and the second connecting sleeve, and the risk that liquid leaks at a connector due to loosening of the bolt is reduced; the use reliability of equipment is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pipe interface technology, and in particular relates to a pipe flange interface. Background Technology

[0002] When connecting pipelines, some require flange connections for easy disassembly and maintenance. Regarding pipeline flange connections, a search revealed a Chinese utility model patent with authorization publication number CN204300561U that discloses flange joints, such as... Figure 1 As shown, it mainly includes a first flange plate a and a second flange plate b. The first flange plate a is connected to the first pipe d, and the second flange plate b is connected to the second pipe e. The first flange plate a and the second flange plate b are mated together and locked together with bolts c, so that the first pipe d and the second pipe e are connected together.

[0003] In the existing technology, similar flange interfaces to the above-mentioned technical solutions have been found to have areas for improvement in actual implementation: during the use of the pipeline, if the connecting bolts of the first flange plate and the second flange plate loosen slightly over time, a gap will be generated between the first flange plate and the second flange plate, that is, a gap will be generated at the connection between the first pipe and the second pipe, which will easily cause the liquid in the pipeline to leak at the connection. Utility Model Content

[0004] In view of the deficiencies and defects in the existing technology, the purpose of this utility model is to provide a pipe flange interface, which solves the problem that in the actual implementation of the flange interface in the existing technology, when the connecting bolts of the first flange plate and the second flange plate become loose, liquid is prone to leakage at the connection of the pipe.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a pipe flange interface, including a first flange plate and a second flange plate, the first flange plate connecting to a first pipe, the second flange plate connecting to a second pipe, the first flange plate having a first outer sleeve at the end connected to the first pipe, the second flange plate having a second outer sleeve at the end connected to the second pipe, the first outer sleeve being fitted onto the outside of the first pipe and welded to the first pipe, the second outer sleeve being fitted onto the outside of the second pipe and welded to the second pipe, the first flange plate having a first connecting sleeve at the end away from the first pipe, the second flange plate having a second connecting sleeve at the end away from the second pipe, the first flange plate and the second flange plate being connected by bolts, and when connected, the first connecting sleeve being fitted onto the outside of the second connecting sleeve, and a sealing rubber sleeve being provided between the first connecting sleeve and the second connecting sleeve, the sealing rubber sleeve being fixed to the outside of the second connecting sleeve.

[0006] As a further improvement of this utility model, the inner side of the first connecting sleeve is provided with an internal thread.

[0007] As a further improvement of this utility model, a diameter-changing step is provided on the inner side of the second flange at the position where the second connecting sleeve and the second outer cylinder are set.

[0008] As a further improvement of this utility model, the second connecting sleeve extends into the inner side of the second outer cylinder, the second outer cylinder is provided with a transition reducing platform at one end near the second connecting sleeve, and the second connecting sleeve is provided with a chamfered bevel at one end near the second pipe, the inclination of the transition reducing platform and the chamfered bevel are the same.

[0009] Compared with the prior art, this utility model has the following advantages:

[0010] 1. By providing a first outer cylinder on one side of the first flange plate and a first connecting sleeve on the other side of the first flange plate, and a second outer cylinder on one side of the second flange plate and a second connecting sleeve on the other side of the second flange plate, when connecting the first flange plate and the second flange plate with bolts, the first connecting sleeve is fitted over the outside of the second connecting sleeve. Therefore, even if the bolts of the first flange plate and the second flange plate loosen slightly, the first connecting sleeve and the second connecting sleeve will only have a slight displacement in the axial direction. Because the first connecting sleeve is fitted over the second connecting sleeve, there will be no gap between the first connecting sleeve and the second connecting sleeve, reducing the risk of liquid leakage at the interface due to bolt loosening and increasing the reliability of equipment use.

[0011] In addition, during installation, the first and second flanges can be adjusted in the axial direction, which can compensate for or neutralize the dimensional errors generated during the pipe installation and manufacturing process, avoid poor connection of the pipe at the interface, further reduce liquid leakage, and make the installation adjustable.

[0012] In addition, a sealing rubber sleeve is installed between the first connecting sleeve and the second connecting sleeve to prevent liquid leakage at the interface.

[0013] 2. By providing an internal thread on the inner side of the first connecting sleeve, the internal thread on the first connecting sleeve can be engaged with the outer side of the sealing rubber sleeve, increasing anti-slip properties and thus reducing the risk of separation between the first connecting sleeve and the second connecting sleeve. In addition, the form and structure of the internal thread is equivalent to a chuck, which can better allow the inner wall of the first connecting sleeve to be embedded in the sealing rubber sleeve, reducing the risk of leakage.

[0014] 3. By providing a transition reducing platform at one end of the second outer cylinder near the second connecting sleeve, and providing a chamfered bevel at one end of the second connecting sleeve near the second pipe, the impact force of water flow at the diameter change is reduced, allowing the water flow to transition smoothly and improving the structural stability.

[0015] 4. As a further improvement of this utility model, a locking nut is provided on both the left and right sides of the first flange plate for the bolt. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the existing technology;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] In the diagram: 1. First flange plate; 2. Second flange plate; 3. First outer cylinder; 4. Second outer cylinder; 5. First connecting sleeve; 6. Second connecting sleeve; 7. Bolt; 8. Sealing rubber sleeve; 9. Variable diameter step; 10. Transition variable diameter platform; 11. Chamfered bevel; 12. Locking nut. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 2-3 The present invention will be described in further detail below. For clarity, only the structures relevant to the inventive features of the present invention are shown in the figures.

[0022] For ease of description, the coordinate system is defined as follows: Figure 2 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0023] This utility model discloses a pipe flange interface. (Refer to...) Figure 2 and Figure 3A pipe flange interface includes a first flange plate 1 and a second flange plate 2. The first flange plate 1 connects to a first pipe, and the second flange plate 2 connects to a second pipe. The first flange plate 1 has a first outer sleeve 3 at the end connected to the first pipe, and the second flange plate 2 has a second outer sleeve 4 at the end connected to the second pipe. The first outer sleeve 3 is fitted over the outside of the first pipe and welded to it. The second outer sleeve 4 is fitted over the outside of the second pipe and welded to it. The first flange plate 1 has a first connecting sleeve 5 at the end away from the first pipe, and the second flange plate 2 has a second connecting sleeve 6 at the end away from the second pipe. The first flange plate 1 and the second flange plate 2 are connected by bolts 7. Each bolt 7 has a locking nut 12 on both sides of the first flange plate 1. During connection, the first connecting sleeve 5 is fitted over the outside of the second connecting sleeve 6, at which point the second connecting sleeve 6 extends into the inside of the first connecting sleeve. A sealing rubber sleeve 8 is provided between the first connecting sleeve 5 and the second connecting sleeve 6, and the sealing rubber sleeve 8 is bonded and fixed to the outside of the second connecting sleeve 6. The sealing rubber sleeve 8 prevents liquid leakage at the interface.

[0024] In addition, such as Figure 3 As shown, a diameter-changing step 9 is provided on the inner side of the second flange at the location where the second connecting sleeve 6 and the second outer cylinder 4 are set. The second connecting sleeve 6 extends into the inner side of the second outer cylinder 4. The second outer cylinder 4 has a transition diameter-changing platform 10 at one end near the second connecting sleeve 6. The second connecting sleeve 6 has a chamfered bevel 11 at one end near the second pipe. The inclination of the transition diameter-changing platform 10 and the chamfered bevel 11 are the same. This reduces the large impact force caused by the water flow at the diameter change, makes the water flow transition smoothly, and improves the structural integrity.

[0025] In addition, the inner side of the first connecting sleeve 5 is provided with an internal thread, so the internal thread on the first connecting sleeve 5 can be locked on the outer side of the sealing rubber sleeve 8, increasing the anti-slip property and reducing the risk of the first connecting sleeve 5 and the second connecting sleeve 6 being separated. Furthermore, the form and structure of the internal thread is equivalent to a claw, which can better allow the inner wall of the first connecting sleeve 5 to be embedded in the sealing rubber sleeve 8, reducing the risk of leakage.

[0026] This invention features a first outer cylinder 3 on one side of the first flange plate 1 and a first connecting sleeve 5 on the other side. A second outer cylinder 4 is provided on one side of the second flange plate 2, and a second connecting sleeve 6 is provided on the other side. During connection, after the first flange plate 1 and the second flange plate 2 are connected with bolts 7, the first connecting sleeve 5 is fitted over the second connecting sleeve 6. Therefore, even if the bolts 7 of the first flange plate 1 and the second flange plate 2 loosen slightly, the first connecting sleeve 5 and the second connecting sleeve 6 will only experience a slight displacement in the axial direction. Because the first connecting sleeve 5 is fitted over the second connecting sleeve 6, there will be no gap between the first connecting sleeve 5 and the second connecting sleeve 6, reducing the risk of liquid leakage at the interface due to loose bolts 7 and increasing the reliability of the equipment.

[0027] In addition, during installation, the first and second flanges can be adjusted in the axial direction, which can compensate for or neutralize the dimensional errors generated during the pipe installation and manufacturing process, avoid poor connection of the pipe at the interface, further reduce liquid leakage, and make the installation adjustable.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be understood that the specific embodiments described herein are only for understanding this utility model and are not intended to limit this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

Claims

1. A pipe flange interface, comprising a first flange plate and a second flange plate, wherein the first flange plate is connected to a first pipe and the second flange plate is connected to a second pipe, characterized in that: The first flange plate has a first outer cylinder at the end connected to the first pipe, and the second flange plate has a second outer cylinder at the end connected to the second pipe. The first outer cylinder is fitted onto the outside of the first pipe and welded to the first pipe. The second outer cylinder is fitted onto the outside of the second pipe and welded to the second pipe. The first flange plate has a first connecting sleeve at the end away from the first pipe, and the second flange plate has a second connecting sleeve at the end away from the second pipe. The first flange plate and the second flange plate are connected by bolts. When connected, the first connecting sleeve is fitted onto the outside of the second connecting sleeve, and a sealing rubber sleeve is provided between the first connecting sleeve and the second connecting sleeve. The sealing rubber sleeve is fixed to the outside of the second connecting sleeve.

2. A pipe flange interface according to claim 1, characterized in that: The inner side of the first connecting sleeve is provided with internal threads.

3. A pipe flange interface according to claim 1, characterized in that: The inner side of the second flange is provided with a diameter-reducing step at the location where the second connecting sleeve and the second outer cylinder are installed.

4. A pipe flange interface according to claim 1, characterized in that: The second connecting sleeve extends into the inner side of the second outer cylinder. The second outer cylinder has a transition reducing platform at one end near the second connecting sleeve. The second connecting sleeve has a chamfered bevel at one end near the second pipe. The inclination of the transition reducing platform and the chamfered bevel are the same.

5. A pipe flange interface according to any one of claims 1-4, characterized in that: Each bolt has a locking nut on both the left and right sides of the first flange plate.

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