Variable-diameter connecting flange

Abstract

The utility model relates to the technical field of pipeline connecting pieces, in particular to a variable-diameter connecting flange which comprises a pipeline, first installation grooves are formed in the two ends of the outer wall of the pipeline, a first positioning ring and a second positioning ring are installed in the first installation grooves, and flanges are installed at the two ends of the outer wall of the pipeline in a sliding mode. The inner wall of the flange is attached to the outer wall of the first positioning ring and the outer wall of the second positioning ring. A connecting assembly is installed between the first positioning ring and the second positioning ring and used for connecting the first positioning ring and the second positioning ring together. And the connecting assembly comprises convex blocks, concave blocks, screw holes and screw rods, and the convex blocks are fixedly connected to the two ends of the first positioning ring. According to the utility model, in a high-temperature and high-pressure environment, if a material expands, the flange and the positioning ring can be still clamped together, so that the flange and the pipeline are always connected together, and the situation that the connecting part is loosened is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connectors, in particular to a variable-diameter connecting flange. Background Technique

[0002] In the field of oil exploration, pipeline connection is a key link to ensure the safe and efficient transmission of fluids. Traditional pipeline connection methods mostly adopt welding, threaded connection or standard flange connection. These connection methods have certain applicability in specific scenarios, but in some special working conditions, such as when the pipeline diameter changes or quick disassembly and repair are required, the above connection methods are very inconvenient. First of all, when the pipeline diameter changes, traditional welding or threaded connection methods often require re-designing the connectors, increasing the engineering cost and construction difficulty. At the same time, welding connection may also cause changes in the material properties of the pipeline, affecting the safety and service life of the pipeline.

[0003] Chinese Utility Model Patent CN203784507U discloses a variable flange joint, which includes large and small flange plates with different diameters, and also includes a double-headed threaded pipe joint connecting the large and small flange plates. The thread diameters at both ends of the double-headed threaded pipe joint are different. A large-diameter threaded pipe that can be screwed with the large-diameter threaded end of the double-headed threaded pipe joint is coaxially arranged at the bottom end of the large flange plate, and a small-diameter threaded pipe that can be screwed with the small-diameter threaded end of the double-headed threaded pipe joint is coaxially arranged at the bottom end of the small flange plate. Sealing grooves are provided between the two ends of the double-headed threaded pipe joint and the bottom ends of the large and small flange plates, and sealing rings are arranged in the sealing grooves. This utility model can connect two different specifications of pipelines and can replace different flange plates to meet the needs of connecting various different specifications of pipelines.

[0004] However, in the above patent, the flange is connected to the pipeline through threads. In the face of high temperature and high pressure environments, the material is prone to expansion, changing the shape and size of the threads, resulting in loosening at the threads, affecting the connection effect and causing oil leakage. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a variable-diameter connecting flange is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a variable-diameter connecting flange, including a pipeline, first installation grooves are opened at both ends of the outer wall of the pipeline, a first positioning ring and a second positioning ring are installed inside the first installation grooves, and flanges are slidably installed at both ends of the outer wall of the pipeline, and the inner wall of the flanges fits with the outer walls of the first positioning ring and the second positioning ring;

[0007] A connecting component is installed between the first positioning ring and the second positioning ring, and the connecting component is used to connect the first positioning ring and the second positioning ring together.

[0008] Furthermore: The connecting component includes a convex block, a concave block, a screw hole and a screw. Convex blocks are fixedly connected to both ends of the first positioning ring, concave blocks are provided at both ends of the second positioning ring, the convex blocks and the concave blocks cooperate with each other, screw holes are provided inside the convex blocks and the concave blocks, and screws are threadedly installed inside the screw holes.

[0009] Furthermore: A cross slot is provided on the outer wall of the screw.

[0010] Furthermore: The outer walls of the first positioning ring and the second positioning ring are wedge-shaped surfaces, the inner wall of the flange is an inclined surface, and the wedge-shaped surface and the inclined surface correspond to each other.

[0011] Furthermore: Second installation grooves are provided at both ends of the pipeline, and sealing rings are installed inside the second installation grooves.

[0012] Furthermore: The sealing ring is made of rubber.

[0013] The utility model has the following beneficial effects:

[0014] 1. Compared with the prior art, by setting the pipeline, the first positioning ring, the second positioning ring, the inclined surface and the sealing ring, when in use, when two pipelines are butted together, and then the two flanges are connected together by bolts. At the same time, through the cooperation of the wedge-shaped surface and the inclined surface, the flange is closely attached to the outer walls of the first positioning ring and the second positioning ring, so as to fix the flange and the pipeline together. The two pipelines can be connected together through the connection of bolts. At the same time, when the two pipelines are connected, through the sealing ring, the sealing effect can be realized to prevent the oil in the pipeline from leaking. The utility model can realize that in a high-temperature and high-pressure environment, if the material expands, the flange can still be clamped with the positioning ring, so as to realize that the flange and the pipeline are always connected together and prevent loosening at the connection.

[0015] 2. Compared with the prior art, the first installation groove, the first positioning ring, the second positioning ring, the convex block, the concave block, the screw hole, the screw and the cross slot first install the flange on the outer wall of the pipeline, then install the first positioning ring and the second positioning ring in the first installation groove, then splice the convex block of the first positioning ring and the concave block of the second positioning ring together, then install the screw in the screw hole, and then insert the cross screwdriver into the cross slot. By rotating the screwdriver, the screw can be driven to rotate, so as to connect the first positioning ring and the second positioning ring together, and then fixedly install the flange on the first positioning ring and the second positioning ring. When disassembly is required, only by removing the first positioning ring and the second positioning ring can the flange be removed, so as to realize the rapid installation and disassembly between the flange and the pipeline. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is an exploded schematic diagram of the present utility model;

[0018] Figure 3 is a schematic cross-sectional structure diagram of the present utility model;

[0019] Figure 4 is an exploded schematic diagram of the first positioning ring and the second positioning ring in the present utility model;

[0020] Figure 5 is Figure 4 an enlarged schematic diagram of part A in

[0021] Legend:

[0022] 1. Pipe; 2. First installation groove; 3. First positioning ring; 4. Second positioning ring; 5. Flange; 6. Inclined surface; 7. Second installation groove; 8. Connection component; 801. Protrusion; 802. Concave block; 803. Screw hole; 804. Screw; 805. Cross slot; 9. Sealing ring. Detailed Description of the Preferred Embodiment

[0023] Referring to Figures 1-5 , a variable-diameter connecting flange provided by the present utility model includes a pipe 1. Both ends of the outer wall of the pipe 1 are provided with first installation grooves 2. A first positioning ring 3 and a second positioning ring 4 are installed inside the first installation grooves 2. Both ends of the outer wall of the pipe 1 are slidably installed with flanges 5. The inner wall of the flanges 5 is in mutual contact with the outer walls of the first positioning ring 3 and the second positioning ring 4. A connection component 8 is installed between the first positioning ring 3 and the second positioning ring 4. The connection component 8 is used to connect the first positioning ring 3 and the second positioning ring 4 together.

[0024] First, install two flanges 5 on the outer wall of the pipe 1, then place the first positioning ring 3 and the second positioning ring 4 inside the first installation grooves 2, then connect the first positioning ring 3 and the second positioning ring 4 together through the connection component 8, then slide the flanges 5 so that the inner walls of the flanges 5 are in contact with the outer walls of the first positioning ring 3 and the second positioning ring 4. Then, when in use and it is necessary to connect two pipes 1 together, connect the two flanges 5 together through bolts, and the two pipes 1 can be fixedly connected.

[0025] The connecting component 8 includes a bump 801, a concave block 802, a screw hole 803 and a screw 804. Bumps 801 are fixedly connected to both ends of the first positioning ring 3, and concave blocks 802 are provided at both ends of the second positioning ring 4. The bump 801 and the concave block 802 cooperate with each other, and screw holes 803 are provided inside the bump 801 and the concave block 802, and a screw 804 is threadedly installed inside the screw hole 803.

[0026] During use, place the first positioning ring 3 and the second positioning ring 4 inside the first installation groove 2, splice the bump 801 and the concave block 802 together, and then install the screw 804 inside the screw hole 803, then the first positioning ring 3 and the second positioning ring 4 can be connected together.

[0027] A cross groove 805 is provided on the outer wall of the screw 804.

[0028] During use, insert a cross screwdriver into the cross groove 805, and by rotating the screwdriver, the screw 804 can be driven to rotate, so as to connect the first positioning ring 3 and the second positioning ring 4 together.

[0029] The outer walls of the first positioning ring 3 and the second positioning ring 4 are wedge-shaped surfaces, and the inner wall of the flange 5 is an inclined surface 6, and the wedge-shaped surface corresponds to the inclined surface 6.

[0030] When two pipes 1 are connected, the two flanges 5 are driven by bolts to fit together, and at the same time, through the wedge-shaped surface and the inclined surface 6, the flange 5 is tightly attached to the outer walls of the first positioning ring 3 and the second positioning ring 4, so as to fix the flange 5 on the outer wall of the pipe 1.

[0031] Second installation grooves 7 are provided at both ends of the pipe 1, and a sealing ring 9 is installed inside the second installation groove 7.

[0032] When two pipes 1 are connected together, the sealing ring 9 can seal the connected ports of the two pipes 1 to prevent the oil in the pipe 1 from leaking.

[0033] The sealing ring 9 is made of rubber.

[0034] Because the rubber material is deformable, when the two pipes 1 are squeezed against each other, the sealing ring 9 can better achieve the sealing effect.

[0035] Working principle: First, install the two flanges 5 on the outer wall of the pipe 1, and then place the first positioning ring 3 and the second positioning ring 4 inside the first installation groove 2.

[0036] Next, the convex block 801 of the first positioning ring 3 and the concave block 802 of the second positioning ring 4 are spliced together. Then, the screw 804 is installed inside the screw hole 803. Then, a cross screwdriver is inserted into the cross slot 805. By rotating the screwdriver, the screw 804 can be driven to rotate, so as to connect the first positioning ring 3 and the second positioning ring 4 together.

[0037] Next, during use, the two flanges 5 are connected together by bolts. At the same time, through the wedge surface and the inclined surface 6, the flange 5 is closely attached to the outer walls of the first positioning ring 3 and the second positioning ring 4, so as to fix the flange 5 to the pipeline 1 together, and then the two pipelines 1 can be connected together.

[0038] At the same time, when the two pipelines 1 are connected, the sealing ring 9 can play a sealing role to prevent the oil in the pipeline 1 from leaking.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable-diameter connecting flange, comprising a pipeline (1), characterized in that: Both ends of the outer wall of the pipeline (1) are provided with first installation grooves (2). A first positioning ring (3) and a second positioning ring (4) are installed inside the first installation grooves (2). Flanges (5) are slidably installed at both ends of the outer wall of the pipeline (1). The inner wall of the flange (5) is in mutual contact with the outer walls of the first positioning ring (3) and the second positioning ring (4). A connection component (8) is installed between the first positioning ring (3) and the second positioning ring (4). The connection component (8) is used to connect the first positioning ring (3) and the second positioning ring (4) together.

2. The variable-diameter connecting flange according to claim 1, characterized in that: The connection component (8) includes a convex block (801), a concave block (802), a screw hole (803), and a screw (804). Convex blocks (801) are fixedly connected to both ends of the first positioning ring (3). Concave blocks (802) are provided at both ends of the second positioning ring (4). The convex blocks (801) and the concave blocks (802) cooperate with each other. Screw holes (803) are provided inside the convex blocks (801) and the concave blocks (802). A screw (804) is threadedly installed inside the screw hole (803).

3. The variable-diameter connecting flange according to claim 2, characterized in that: A cross groove (805) is provided on the outer wall of the screw (804).

4. The variable-diameter connecting flange according to claim 1, characterized in that: The outer walls of the first positioning ring (3) and the second positioning ring (4) are wedge-shaped surfaces, and the inner wall of the flange (5) is an inclined surface (6). The wedge-shaped surfaces and the inclined surface (6) correspond to each other.

5. A variable-diameter connecting flange according to claim 1, characterized in that: Second installation grooves (7) are provided at both ends of the pipeline (1). A sealing ring (9) is installed inside the second installation grooves (7).

6. The variable-diameter connecting flange according to claim 5, wherein: The sealing ring (9) is made of rubber material.

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