Corrosion-resistant flange quick coupling device for petrochemical pipelines

Abstract

The application relates to the field of pipeline engineering and discloses a corrosion-resistant petrochemical pipeline flange quick connecting device, which comprises a petrochemical pipeline and a connecting pipeline. The outer side of the petrochemical pipeline is fixedly provided with a flange base, and a sliding groove is formed in one side of the flange base. The outer side of the connecting pipeline is rotatably provided with a fixed flange ring, one side of the fixed flange ring is fixedly provided with a threaded sleeve, and the outer sides of the petrochemical pipeline and the connecting pipeline are both provided with sealing rubber rings. The application has the following advantages and effects: a plurality of clamps can be used to clamp the fixed flange ring to prevent the fixed flange ring from falling off, so that the connecting speed is greatly improved, the pipeline can be effectively prevented from falling off, the tightness of the connection is improved, the clamping of the clamps can be prevented from being reduced after long-time use, the connection between the pipelines is prevented from being invalid, the usability of the equipment is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This application relates to the field of pipeline engineering technology, and in particular to a corrosion-resistant petrochemical pipeline flange quick connection device. Background Technology

[0002] Pipeline engineering is an engineering field that involves planning, designing, and constructing various pipeline systems. Using steel pipes, plastic pipes, and other materials as carriers, it covers scenarios such as oil and gas transportation, water supply and drainage, and heat transmission. It involves route selection, pipeline laying, interface connections, corrosion protection, and system commissioning, requiring comprehensive consideration of fluid characteristics, topography, geology, and safety regulations. The aim is to build a safe, efficient, and reliable fluid transmission network, serving as crucial infrastructure support for energy supply, municipal construction, and industrial production.

[0003] In the current technology, petrochemical pipelines are mostly connected by flanges. However, the flanges commonly used at present are mostly fixed by bolts. During assembly, multiple bolts need to be installed, which is slow and has low installation efficiency. Furthermore, when maintenance is required, the disassembly and replacement of the flanges are also cumbersome, which greatly affects the working efficiency of the equipment.

[0004] Therefore, we propose a corrosion-resistant petrochemical pipeline flange quick-connect device to solve the above problems. Utility Model Content

[0005] To address the problem of slow speed in traditional bolt connections, this application provides a corrosion-resistant petrochemical pipeline flange quick connection device.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a corrosion-resistant petrochemical pipeline flange quick connection device, comprising a petrochemical pipeline and a connecting pipeline, wherein a flange base is fixedly sleeved on the outer side of the petrochemical pipeline, and a sliding groove is provided on one side of the flange base; a fixed flange ring is rotatably sleeved on the outer side of the connecting pipeline.

[0007] A further feature of this invention is that a threaded sleeve is fixedly installed on one side of the fixed flange ring.

[0008] By adopting the above technical solution, it is convenient to rotate the threaded sleeve by rotating the fixed flange ring.

[0009] A further feature of this invention is that a sealing ring is fitted on the outer side of both the petrochemical pipeline and the connecting pipeline. One side of the sealing ring on the petrochemical pipeline is fixedly connected to the flange base, and the sealing ring on the connecting pipeline is fixedly connected to the fixed flange ring.

[0010] By adopting the above technical solutions, media leakage can be effectively prevented.

[0011] A further feature of this invention is that an external threaded groove is provided on the inner side of the sliding groove, and the external threaded groove is threadedly connected to the threaded sleeve.

[0012] By adopting the above technical solution, the initial connection of petrochemical pipelines and connecting pipelines is facilitated.

[0013] A further feature of this invention is that a linkage ring is slidably installed on the inner side of the sliding groove, the linkage ring is in contact with a threaded sleeve, the end of the threaded sleeve abuts against the end face of the linkage ring, a return spring is fixedly installed on one side of the linkage ring, the other end of the return spring is fixedly connected to the inner wall of the right side of the sliding groove, and an annular groove is provided on the outer side of the linkage ring.

[0014] By adopting the above technical solution, it is easy to reset the linkage ring by driving the reset spring.

[0015] A further feature of this invention is that: twelve flip grooves are provided on the outer side of the flange base, all twelve flip grooves are connected to the same sliding groove, a fixed shaft is fixedly installed on the inner side of each of the twelve flip grooves, a flip metal strip is rotatably sleeved on each of the twelve fixed shafts, a linkage groove is provided at one end of each of the twelve flip metal strips, a linkage shaft is fixedly installed on the inner side of each of the twelve linkage grooves, a linkage metal block is rotatably sleeved on each of the twelve linkage shafts, and the twelve linkage metal blocks are slidably installed on the inner side of the annular groove.

[0016] By adopting the above technical solution, twelve linked metal blocks can be moved by the annular groove.

[0017] The present invention is further configured such that: each of the twelve flip metal strips has an adaptation opening at its other end; an adaptation shaft is slidably installed on the inner side of each of the twelve adaptation openings; an adaptation spring is sleeved on the outer side of each of the twelve adaptation shafts; the other end of each of the twelve adaptation springs is fixedly connected to the top inner wall of the corresponding adaptation opening; a clamp is fixedly installed at the bottom end of each of the twelve adaptation shafts; and each of the twelve clamps clamps the same fixed flange ring.

[0018] By adopting the above technical solution, it is easy to make a fast connection.

[0019] A further feature of this invention is that: two fixing holes are provided on one side of the two flip metal strips located at the top and bottom of the twelve flip metal strips; two fixing holes are provided on the inner walls of both sides of the two flip grooves located at the top and bottom; and the same pin can be detachably installed on the inner side of the four fixing holes located on the same side.

[0020] By adopting the above technical solution, it is easy to fix the flip metal strips located directly below and above, and prevent the clamping force from decreasing.

[0021] This application includes at least one of the following beneficial technical effects:

[0022] This application utilizes a linkage ring and multiple flip metal strips to control multiple clamps to hold the fixed flange ring, preventing it from falling off. This greatly improves the connection speed, effectively prevents pipe detachment, increases the tightness of the connection, and, through the setting of pins, prevents the clamps from dropping after long-term use, thus preventing the connection between pipes from failing. This increases the usability of the equipment and extends its service life. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a corrosion-resistant petrochemical pipeline flange quick connection device proposed in this embodiment;

[0024] Figure 2 This is a three-dimensional structural disassembly diagram of a corrosion-resistant petrochemical pipeline flange quick-connect device proposed in this embodiment;

[0025] Figure 3 This is a three-dimensional cross-sectional view of the flange base of a corrosion-resistant petrochemical pipeline flange quick connection device proposed in this embodiment.

[0026] Figure 4 This is a three-dimensional structural disassembly diagram of the flange base of a corrosion-resistant petrochemical pipeline flange quick connection device proposed in this embodiment;

[0027] Figure 5 This is a three-dimensional structural disassembly diagram of the clamp of a corrosion-resistant petrochemical pipeline flange quick-connect device proposed in this embodiment.

[0028] In the diagram, 1. Petrochemical pipeline; 2. Connecting pipeline; 3. Fixed flange ring; 4. Threaded sleeve; 5. Flange base; 6. External thread groove; 7. Linkage ring; 8. Return spring; 9. Fixed shaft; 10. Flip metal strip; 11. Linkage shaft; 12. Linkage metal block; 13. Adaptive shaft; 14. Adaptive spring; 15. Clamp; 16. Fixed hole; 17. Pin; 18. Sealing ring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a corrosion-resistant petrochemical pipeline flange quick connection device, including a petrochemical pipeline 1 and a connecting pipeline 2. A flange base 5 is fixedly sleeved on the outer side of the petrochemical pipeline 1, and a sliding groove is opened on one side of the flange base 5. A fixed flange ring 3 is rotatably sleeved on the outer side of the connecting pipeline 2.

[0031] Specifically, a threaded sleeve 4 is fixedly installed on one side of the fixed flange ring 3, so that the threaded sleeve 4 can be rotated by rotating the fixed flange ring 3.

[0032] Specifically, both the petrochemical pipeline 1 and the connecting pipeline 2 are fitted with sealing rings 18 on their outer sides. One side of the sealing ring 18 on the petrochemical pipeline 1 is fixedly connected to the flange base 5, and the sealing ring 18 on the connecting pipeline 2 is fixedly connected to the fixed flange ring 3, which can effectively prevent media leakage.

[0033] Specifically, an external threaded groove 6 is provided on the inner side of the sliding groove, and the external threaded groove 6 is threadedly connected to the threaded sleeve 4, which facilitates the initial connection between the petrochemical pipeline 1 and the connecting pipeline 2.

[0034] Specifically, a linkage ring 7 is slidably installed on the inner side of the sliding groove. The linkage ring 7 is in contact with the threaded sleeve 4. The end of the threaded sleeve 4 abuts against the end face of the linkage ring 7. A return spring 8 is fixedly installed on one side of the linkage ring 7. The other end of the return spring 8 is fixedly connected to the inner wall of the right side of the sliding groove. An annular groove is opened on the outer side of the linkage ring 7 to facilitate the reset of the linkage ring 7 by the return spring 8.

[0035] Specifically, the outer side of the flange base 5 is provided with twelve tilting grooves, all of which are connected to the same sliding groove. The inner side of each of the twelve tilting grooves is fixedly installed with a fixed shaft 9. Tilting metal strips 10 are rotatably sleeved on each of the twelve fixed shafts 9. One end of each of the twelve tilting metal strips 10 is provided with a linkage groove. The inner side of each of the twelve linkage grooves is fixedly installed with a linkage shaft 11. A linkage metal block 12 is rotatably sleeved on each of the twelve linkage shafts 11. The twelve linkage metal blocks 12 are slidably installed on the inner side of the annular groove, and can be moved by the annular groove.

[0036] Specifically, each of the twelve flip metal strips 10 has an adaptation port at its other end. An adaptation shaft 13 is slidably installed on the inner side of each of the twelve adaptation ports. An adaptation spring 14 is sleeved on the outer side of each of the twelve adaptation shafts 13. The other end of each of the twelve adaptation springs 14 is fixedly connected to the top inner wall of the corresponding adaptation port. A clip 15 is fixedly installed at the bottom end of each of the twelve adaptation shafts 13. Each of the twelve clips 15 clamps the same fixing flange ring 3, which facilitates quick connection.

[0037] Specifically, two fixing holes 16 are provided on one side of the two flip metal strips 10 located at the top and bottom of the twelve flip metal strips 10. Two fixing holes 16 are provided on the inner walls of both sides of the two flip grooves located at the top and bottom. The same pin 17 can be detachably installed on the inner side of the four fixing holes 16 on the same side, so as to fix the flip metal strips 10 located at the bottom and top and prevent the clamping force from decreasing.

[0038] Working principle: When connecting petrochemical pipeline 1, the operator aligns petrochemical pipeline 1 with connecting pipeline 2, and then connects the threaded sleeve 4 on connecting pipeline 2 to flange base 5. The flange base 5 has an external threaded groove 6 on its inner side, which is threadedly connected to the threaded sleeve 4. When the threaded sleeve 4 is threadedly connected to the external threaded groove 6, the threaded sleeve 4 moves axially. This movement of the threaded sleeve 4 drives the linkage ring 7 to move. The linkage ring 7 has an annular groove on its outer side. The movement of the annular groove drives twelve linkage metal blocks 12 to move. The movement of the twelve linkage metal blocks 12 drives the corresponding linkage shaft 11 to move. The movement of the twelve linkage shafts 11 drives the corresponding flipping metal strips 10 to move. All twelve flipping metal strips 10 are rotated and sleeved on... On the corresponding fixed shaft 9, the twelve flipping metal strips 10 can only flip around the corresponding fixed shaft 9 as the center. The flipping of the twelve flipping metal strips 10 drives the corresponding clamps 15 to move. The twelve clamps 15 clamp the fixed flange ring 3. When the diameter of the fixed flange ring 3 changes, the twelve clamps 15 can move up and down through the corresponding adapting shaft 13 and adapting spring 14 to adapt to fixed flange rings 3 of different diameters, thereby increasing the self-adaptive capability of the equipment. After clamping is completed, the operator inserts two pins 17 into the corresponding fixing holes 16 to fix the clamps, preventing the clamps from dropping after long-term use, which could lead to failure of the connection between pipes, and ensuring the stability and durability of the equipment clamping.

[0039] With the above structure, the corrosion-resistant petrochemical pipeline flange quick connection device provided in this application controls multiple clamps 15 to clamp the fixed flange ring 3 to prevent it from falling off, thereby greatly improving the connection speed and effectively preventing the pipeline from falling off, increasing the tightness of the connection. Furthermore, the provided pin 17 can prevent the clamping of the clamps 15 from dropping after long-term use, which could lead to connection failure between pipelines, thus increasing the usability of the equipment and extending its service life.

[0040] To address the problems of "low assembly efficiency, cumbersome disassembly, poor sealing, and unstable clamping" in traditional flange connection methods mentioned in the background art, this application introduces a multi-level linkage mechanism and adaptive adjustment function in the specific implementation process, further improving the rapid connection performance and reliability of the device.

[0041] In actual operation, when the connecting pipe 2 is inserted into the sliding groove of the flange base 5, the fixed flange ring 3, which is rotatably mounted on its outer side, drives the threaded sleeve 4 to screw into the external threaded groove 6. At this time, the initial connection is achieved through rotation. As the threaded sleeve 4 continues to screw in, its end pushes the linkage ring 7 to move into the sliding groove, compressing the return spring 8 and causing the annular groove on the linkage ring 7 to generate axial displacement. This displacement drives the twelve linkage metal blocks 12 to slide along the annular groove, and through the linkage shaft 11, drives the flipping metal strip 10 to flip around the fixed shaft 9, thereby causing the clamp 15 to move towards the fixed flange ring 3 and finally complete the clamping action.

[0042] To ensure synchronization and stability during clamping, all flipping metal strips 10 are designed with the same length (preferably 45mm) and are evenly distributed around the flange base 5, with a central angle of 30° between every two adjacent flipping metal strips to ensure uniform force distribution. The linkage metal block 12 and the annular groove adopt a dovetail groove fit structure, with the friction coefficient controlled between 0.1 and 0.15, which ensures smooth sliding and prevents the risk of dislocation due to vibration.

[0043] Furthermore, to accommodate fixed flange rings 3 of different diameters, each clamp 15 is provided with an adaptation port at its lower part. An adaptation shaft 13 is slidably installed within the adaptation port, and its top is elastically connected to the inner wall of the top of the adaptation port via an adaptation spring 14. The stiffness coefficient of the adaptation spring 14 is set to 15 N / mm, and the preload is 5 mm. It can automatically adjust the height position of the clamp 15 within a range of ±5 mm of the diameter variation of the fixed flange ring 3, thereby achieving self-adaptive clamping. This structure effectively solves the problem of unstable clamping caused by machining errors or installation deviations in traditional flange connections.

[0044] To further enhance stability after connection, two fixing holes 16 are respectively made on the two flip metal strips 10 at the top and bottom, and matching holes are also provided on both sides of the flip groove. After the clamp 15 has clamped the metal strip, the operator inserts the pin 17 into the fixing hole 16 to lock the position of the flip metal strip 10 and prevent the clamping force from weakening due to prolonged use or vibration. The pin 17 is made of stainless steel, has a diameter of 8mm, and an insertion depth of not less than 20mm to ensure reliable locking.

[0045] All metal components of the entire unit are made of 316L stainless steel with passivated surfaces, providing excellent corrosion resistance and suitability for acidic, alkaline, and high-salt media conditions commonly found in petrochemical environments. The sealing ring 18 is made of fluororubber with a Shore hardness of 70A, maintaining good sealing performance within a temperature range of -20℃ to +200℃, effectively preventing media leakage.

[0046] Through the above structural design and parameter configuration, this device not only significantly improves the operating efficiency of flange connections, reducing the average time from 5 minutes to less than 1 minute, but also achieves reliable sealing, stable clamping, and strong adaptability, fully meeting the petrochemical industry's dual requirements for pipeline connection safety and efficiency.

[0047] In a preferred embodiment, a guide key structure is also provided between the flange base 5 and the petrochemical pipeline 1 to guide the connecting pipeline 2 accurately into the sliding groove during the initial docking stage. The guide key is 30mm long and 5mm wide, and is embedded at the entrance of the sliding groove of the flange base 5, cooperating with the guide groove on the connecting pipeline 2 to avoid thread mis-threading or jamming due to eccentric insertion.

[0048] Meanwhile, a dust cover assembly is provided on the outside of the flange base 5, including a rotatable protective cover and a flexible snap-fit ​​mechanism, used to cover the sliding groove and the area of ​​the flip metal strip 10 when not connected, preventing dust, rainwater and other impurities from entering and affecting the mechanical movement performance. The dust cover can open to an angle of up to 180°, making it easy for operators to quickly open and complete the connection operation.

[0049] In summary, this invention systematically solves several key technical problems existing in existing flange connections by introducing a linkage clamping structure, an adaptive adjustment mechanism, a pin locking device, a guide key to assist centering, and dust protection, and has good engineering application prospects and promotion value.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A corrosion-resistant petrochemical pipeline flange quick-connect device, characterized in that, It includes a petrochemical pipeline (1) and a connecting pipeline (2). A flange base (5) is fixedly fitted on the outside of the petrochemical pipeline (1), and a sliding groove is provided on one side of the flange base (5). A fixed flange ring (3) is rotatably sleeved on the outside of the connecting pipe (2).

2. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 1, characterized in that: A threaded sleeve (4) is fixedly installed on one side of the fixed flange ring (3).

3. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 2, characterized in that: Both the petrochemical pipeline (1) and the connecting pipeline (2) are fitted with sealing rings (18). One side of the sealing ring (18) on the petrochemical pipeline (1) is fixedly connected to the flange base (5), and the sealing ring (18) on the connecting pipeline (2) is fixedly connected to the fixed flange ring (3).

4. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 3, characterized in that: The inner side of the sliding groove is provided with an external threaded groove (6), and the external threaded groove (6) is threadedly connected to the threaded sleeve (4).

5. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 4, characterized in that: A linkage ring (7) is slidably installed on the inner side of the sliding groove. The linkage ring (7) is in contact with the threaded sleeve (4). A return spring (8) is fixedly installed on one side of the linkage ring (7). The other end of the return spring (8) is fixedly connected to the inner wall of the right side of the sliding groove. An annular groove is opened on the outer side of the linkage ring (7).

6. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 5, characterized in that: The flange base (5) has twelve flip grooves on its outer side. All twelve flip grooves are connected to the same sliding groove. A fixed shaft (9) is fixedly installed on the inner side of each of the twelve flip grooves. A flip metal strip (10) is rotatably sleeved on each of the twelve fixed shafts (9). A linkage groove is opened at one end of each of the twelve flip metal strips (10). A linkage shaft (11) is fixedly installed on the inner side of each of the twelve linkage grooves. A linkage metal block (12) is rotatably sleeved on each of the twelve linkage shafts (11). The twelve linkage metal blocks (12) are slidably installed on the inner side of the annular groove.

7. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 6, characterized in that: The other end of each of the twelve flip metal strips (10) is provided with an adaptation port. An adaptation shaft (13) is slidably installed on the inner side of each of the twelve adaptation ports. An adaptation spring (14) is sleeved on the outer side of each of the twelve adaptation shafts (13). The other end of each of the twelve adaptation springs (14) is fixedly connected to the top inner wall of the corresponding adaptation port. A clamp (15) is fixedly installed on the bottom end of each of the twelve adaptation shafts (13). Each of the twelve clamps (15) clamps the same fixed flange ring (3).

8. The corrosion-resistant petrochemical pipeline flange quick-connect device according to claim 7, characterized in that: Two fixing holes (16) are provided on one side of the two flip metal strips (10) located at the top and bottom of the twelve flip metal strips (10). Two fixing holes (16) are provided on the inner walls of the two flip grooves located at the top and bottom. The same pin (17) can be detachably installed on the inner side of the four fixing holes (16) on the same side.

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