Metal pipeline connecting device
By introducing a locking structure and inner lining design into the metal pipe connection device, the sealing and strength problems caused by aging and vibration of the corrugated compensator under high temperature and high pressure environment are solved, realizing quick disassembly and efficient connection.
Patent Information
- Application Number
- CN202423266599.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
When existing metal pipe connection devices are used in high temperature, high pressure and vibration environments, corrugated compensators are prone to aging, fatigue and corrosion, resulting in reduced sealing and connection strength, and low disassembly and assembly efficiency. In particular, bolt connection is time-consuming and labor-intensive, and clamp connection has insufficient strength and sealing.
It adopts a locking structure and inner liner design. The locking structure includes a fixing plate, a rotating shaft, a limiting strip, and a fastening shaft. The inner liner is longer than the corrugated pipe. The pipe end is clamped by the limiting strip and the corrugated pipe. Combined with the reinforcing rod and the fastening nut, quick assembly and disassembly can be achieved.
It enables rapid assembly and disassembly of metal pipes while ensuring connection strength and sealing, thus improving assembly and disassembly efficiency and enhancing the tightness and sealing of the connection.
Smart Images
Figure CN223740263U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipe joint technology, and relates to connection devices, specifically a metal pipe connection device. Background Technology
[0002] When corrugated compensators are connected to pipelines, they are usually connected using connecting devices. In the petroleum, natural gas and other chemical industries, the main reason why corrugated compensators need to be replaced frequently is that the use in high temperature and high pressure environments causes the materials of the corrugated compensators to gradually age, metal fatigue, corrosion and other phenomena, which affect their performance and lifespan. In addition, since pipeline systems in the chemical industry are often subjected to high liquid flow rates, impacts and vibrations, these factors may also cause damage and wear to the corrugated compensators. Therefore, it is necessary to replace the corrugated compensators frequently.
[0003] Existing connection devices typically involve butt-jointing two flanges and securing them with bolts. In environments requiring frequent disassembly and maintenance of the bellows compensator, the disassembly and assembly of numerous bolts not only increases the workload of workers but also reduces their efficiency. Furthermore, during disassembly, the flanges may become stuck together due to aging of the sealing rings caused by prolonged connection, necessitating the use of prying tools, which can easily damage the flanges. Another method uses clamps to connect the bellows compensator to the pipeline, which allows for quick assembly and disassembly, but the connection strength and sealing performance of clamp-fixing are inferior to bolted connections. Therefore, this paper proposes a metal pipeline connection device that can guarantee both connection strength and sealing while enabling quick assembly and disassembly. Utility Model Content
[0004] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a metal pipe connection device that can achieve rapid assembly and disassembly while ensuring strength and sealing.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A metal pipe connection device includes a corrugated pipe, both ends of which are provided with locking structures; an inner liner is inserted inside the corrugated pipe.
[0007] As a limitation of this utility model, the locking structure includes at least four fixing plate groups fixed to the outside of the bellows end. Each fixing plate group includes two fixing plates, and a rotating shaft is sandwiched between the two fixing plates. A portal frame is rotatably sleeved between the two fixing plates and on the rotating shaft. Two through holes are opened on the crossbeam of the portal frame. A threaded fastening shaft passes through each through hole. One end of the fastening shaft is rotatably inserted on the crossbeam of the portal frame, and a limit ring is fixedly provided at the end of the fastening shaft placed inside the portal frame. A handle is fixedly provided at the end of the fastening shaft away from the limit ring.
[0008] As a further limitation of this utility model, the locking structure also includes at least four limiting strips, each of which has a fastening groove with an internal thread that meshes with the external thread of the fastening shaft at the position corresponding to the fastening shaft.
[0009] As a further limitation of this utility model, through holes are provided at both ends of each limiting strip.
[0010] As a further limitation of this utility model, at least four reinforcing rods are provided at both ends along the axial direction of the bellows, and each reinforcing rod has external threads at both ends.
[0011] As a further limitation of this utility model, each reinforcing rod is fitted with a fastening nut at its end, which has an internal thread that mates with the external thread of the reinforcing rod.
[0012] As another limitation of this utility model, the length of the inner lining tube is greater than the length of the corrugated tube.
[0013] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:
[0014] (1) This utility model relates to a metal pipe connection device, which enables quick disassembly by setting a locking structure that can rotate at the end of the corrugated pipe and a matching limiting strip.
[0015] (2) This utility model relates to a metal pipe connection device, which improves the tightness and sealing of the connection device and the connected pipe by setting an inner liner tube with a length longer than that of the corrugated pipe inside the corrugated pipe, with the ends of the inner liner tube longer than the corrugated pipe extending into the two sets of pipes to be connected, and then clamping the pipe ports to be connected between the limiting strip and the corrugated pipe.
[0016] In summary, this utility model relates to a metal pipe connection device that can effectively achieve rapid assembly and disassembly while ensuring strength and sealing.
[0017] This utility model is applicable to the connection of metal pipes and is used to connect metal pipes. Attached Figure Description
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0020] Figure 2 This is a three-dimensional assembly drawing of an embodiment of the present utility model.
[0021] In the diagram: 1. Corrugated pipe; 2. Inner liner; 3. Fixing plate; 4. Reinforcing rod; 5. Fastening shaft; 6. Portal frame; 7. Rotating shaft; 8. Limiting ring; 9. Limiting strip; 10. Fastening nut. Detailed Implementation
[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.
[0023] Example 1: A metal pipe connection device
[0024] like Figure 1 and Figure 2 As shown, this embodiment relates to a metal pipe connection device, including a corrugated pipe 1, both ends of which are provided with locking structures; an inner liner pipe 2 is inserted inside the corrugated pipe 1.
[0025] The locking structure includes at least four fixing plate groups fixed to the outside of the end of the bellows 1. Each group of fixing plates 3 includes two fixing plates 3. A rotating shaft 7 is sandwiched between the two fixing plates 3. A portal frame 6 is rotatably sleeved between the two fixing plates 3 and on the rotating shaft 7. Two through holes are opened on the crossbeam of the portal frame 6. A threaded fastening shaft 5 passes through each through hole. One end of the fastening shaft 5 is rotatably inserted on the crossbeam of the portal frame 6. A limit ring 8 is fixedly installed at the end of the fastening shaft 5 that is away from the limit ring 8. A handle is fixedly installed at the end of the fastening shaft 5 that is away from the limit ring 8.
[0026] The locking structure also includes at least four limiting strips 9, each of which has a fastening groove with an internal thread that meshes with the external thread of the fastening shaft 5 at the position corresponding to the fastening shaft 5.
[0027] Each limiting strip 9 has through holes at both ends.
[0028] At least four reinforcing rods 4 are inserted through both ends along the axial direction of the bellows 1, and each reinforcing rod 4 has external threads at both ends.
[0029] Each reinforcing rod 4 has a fastening nut 10 at its end, which has an internal thread that mates with the external thread of the reinforcing rod 4.
[0030] The length of the inner liner 2 is greater than the length of the corrugated pipe 1.
[0031] When using this embodiment, place it between the two pipes that need to be connected, insert the inner liner 2 into the two pipes respectively, wrap the four limiting strips 9 around the rear of the connecting pipe end, and put them on the reinforcing rod 4. Rotate the fastening shaft 5 to the fastening groove on the limiting strip 9 corresponding to the position of the fastening shaft 5, rotate the handle on the fastening shaft 5 so that the limiting strip 9 and the end of the corrugated pipe 1 clamp the end of the connecting pipe, and then tighten the fastening nut 10 on the reinforcing rod 4 to fix the limiting strip 9.
[0032] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A metal pipe coupling device, characterized by: The connecting device comprises a corrugated pipe, both ends of which are provided with locking structures; an inner liner pipe is arranged in the corrugated pipe; the locking structure comprises at least four fixed sheet groups fixed on the outer side of the end of the corrugated pipe, each fixed sheet group comprises two fixed sheets, a rotating shaft is arranged between the two fixed sheets, a door-shaped rotating support is arranged between the two fixed sheets and rotatably arranged on the rotating shaft, two through holes are formed in the crossbeam of the door-shaped rotating support, a threaded fastening shaft is arranged in each through hole, one end of the fastening shaft is rotatably arranged on the crossbeam of the door-shaped rotating support, a limiting ring is fixedly arranged on the end of the fastening shaft arranged in the door-shaped rotating support, and a rotating handle is fixedly arranged on the end of the fastening shaft away from the limiting ring; the length of the inner liner pipe is greater than the length of the corrugated pipe.
2. The metal pipe coupling device according to claim 1, characterized by: The locking structure further comprises at least four limiting strips, each limiting strip is provided with a fastening groove with internal threads engaged with the external threads of the fastening shaft at the position corresponding to the fastening shaft.
3. The metal pipe coupling device according to claim 2, characterized by: Both ends of each limiting strip are provided with through holes.
4. The metal pipe coupling device according to claim 3, characterized by: At least four reinforcing rods are arranged in the axial direction of both ends of the corrugated pipe, and each reinforcing rod is provided with external threads at both ends.
5. The metal pipe coupling device according to claim 4, characterized by: A fastening nut with internal threads matched with the external threads of the reinforcing rod is arranged on the end of each reinforcing rod.