A sealed connection structure of a steel skeleton fiber reinforced resin pipe

Abstract

This utility model belongs to the technical field of pipeline connection devices, and discloses a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. Its main technical features are: it includes a pipe body connected to a sleeve; the connection end between the pipe body and the sleeve is provided with an annular sealing groove and an external tapered thread; an O-ring is provided in the annular sealing groove; the connection end between the sleeve and the pipe body is provided with an internal tapered thread matching the external tapered thread; and a thread sealing adhesive layer is provided between the external and internal tapered threads. This sealing connection structure of the steel-reinforced fiber-reinforced resin pipe, with its double sealing structure between the pipe body and the sleeve, greatly improves sealing reliability and is suitable for harsh working conditions such as high pressure and corrosive media. It allows for effective quick-connect coupling between non-metallic and metallic components. The detachable design facilitates maintenance and replacement, and the structure is compact and occupies little space.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe connection devices, and particularly relates to a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. Background Technology

[0002] In piping systems, steel pipes primarily rely on threaded connections, flange connections, or welding. These methods have significant drawbacks: 1. Threaded connections: Sealing relies on PTFE tape or sealant, and long-term use can lead to leaks due to thermal expansion and contraction or vibration. 2. Flange connections: Require bolt tightening, are complex to install, occupy a large space, and are prone to bolt fatigue under high pressure. 3. Welding: Has a high skill threshold, requires certified welders, and carries the risk of thermal deformation, making it unsuitable for non-metallic pipes.

[0003] With industrial development, pipeline systems need to meet higher requirements: 1. Rapid installation: Industries such as petroleum and chemical industries need to reduce downtime. 2. Adaptability: Compatible with different materials such as metals, plastics, and composite materials, and pipe diameters ranging from millimeters to meters. 3. Reliable sealing: Preventing leakage of toxic and corrosive media. 4. Resistance to dynamic loads: Coping with vibrations caused by earthquakes, fluid pulsations, etc. Current pipeline connection devices cannot meet these requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sealing connection structure for steel skeleton fiber reinforced resin tubes that can be quickly connected with connectors, has wide adaptability, and provides reliable sealing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a pipe body, which is connected to a sleeve. The connection end between the pipe body and the sleeve is provided with an annular sealing groove and an external tapered thread. An O-ring is provided in the annular sealing groove. The connection end between the sleeve and the pipe body is provided with an internal tapered thread that matches the external tapered thread. A thread sealing adhesive layer is provided between the external tapered thread and the internal tapered thread.

[0006] Its additional technical features are: the taper of the external tapered thread and the internal tapered thread is 1:16 to 1:5; The width of the annular sealing groove is 1 / 20 to 1 / 10 of the sleeve length, and the distance between the annular sealing groove and the end of the pipe body is 10-20 mm. The annular sealing groove may be one, two, or three; the non-connecting ends of the sleeve and the pipe body are provided with flanges, quick-connect fittings, or K-type fittings.

[0007] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin tube. In use, an O-ring is installed in the annular sealing groove, and a flame-retardant, anti-static anaerobic thread sealant layer is applied to the surface of the outer tapered thread. The inner tapered thread of the sleeve is tightened to the outer tapered thread of the tube body, securing the tube body and sleeve together. At this point, the inner and outer tapered threads, combined with the thread sealant layer, form the first sealing barrier. The O-ring, deformed under pressure within the annular sealing groove, forms the second sealing barrier. This double-sealing structure between the tube body and sleeve significantly improves sealing reliability and is suitable for harsh conditions such as high pressure and corrosive media. It allows for effective quick-connect couplings between non-metallic and metallic materials. The detachable design facilitates maintenance and replacement, and the compact structure occupies little space.

[0008] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. The preferred taper of the external and internal tapered threads is 1:16 to 1:5; other tapers can be selected based on the working pressure of the joint and the lengths of the pipe body and sleeve. The thread sealant layer is a flame-retardant and antistatic anaerobic thread sealant, whose flame-retardant and antistatic properties meet the MT181-1988 standard, forming an elastic sealing layer after curing. The flame-retardant and antistatic anaerobic sealant uses a flame-retardant base material or adds flame-retardant materials to achieve flame-retardant properties, and uses conductive fillers or conductive agents to achieve antistatic properties. The O-ring is made of fluororubber or hydrogenated nitrile rubber, possessing good chemical corrosion resistance. The O-ring material is antistatic and meets the requirements of MT181-1988. Depending on the needs, the width of the annular sealing groove is 1 / 10 to 1 / 20 of the sleeve length, the distance from the annular sealing groove to the end of the pipe body is 10-20 mm, and there can be one, two, or three annular sealing grooves. When there is one annular sealing groove, it is suitable for pressures below 10MPa and is often used for coal mine water supply and drainage; when there are two annular sealing grooves, it is suitable for pressures from 10MPa to 20MPa and is often used for pressure pipelines, pressure equipment and long-distance liquid return in mines; when there are three annular sealing grooves, it is suitable for pressures above 20MPa and is often used for long-distance liquid supply in mines, etc.

[0009] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. The non-connecting ends of the sleeve and pipe body are equipped with flanges, quick-connect couplings, or K-type couplings. The pipe bodies can be connected via flange connections, quick-connect couplings, or K-type couplings. When connecting via flanges, the carbon steel sleeve is welded to a carbon steel flange of the corresponding pressure requirement. The pipe bodies are sealed with a metal spiral wound gasket and connected with bolts. When connecting via quick-connect couplings, grooves are machined into the carbon steel sleeve according to the pressure requirement, sealed with sealing rings, and connected with grooved clamps. When connecting via K-type couplings, K-type couplings are welded onto the carbon steel sleeve according to the pressure requirement, and the pipe bodies are connected using quick couplings and U-shaped pins. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the sealing connection structure of a steel-reinforced fiber-reinforced resin tube according to the present invention. Figure 2 This is a schematic diagram of the tube structure; Figure 3 This is a schematic diagram of the first type of sleeve structure; Figure 4 This is a schematic diagram of the second type of sleeve structure; Figure 5 This is a schematic diagram of the third structure of the sleeve; Figure 6 This is a schematic diagram of the first type of connection structure for the pipe body; Figure 7 A three-dimensional structural diagram of the first type of connection for the pipe body; Figure 8 This is a schematic diagram of the second type of connection structure for the pipe body; Figure 9 This is a schematic diagram of the third type of connection structure for the pipe body. Detailed Implementation

[0011] The following is a detailed description of the specific structure of the sealing connection structure of the steel skeleton fiber reinforced resin tube according to the present invention, with reference to the accompanying drawings.

[0012] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the sealing connection structure of a steel-reinforced fiber-reinforced resin pipe of this utility model includes a pipe body 1, which is connected to a sleeve 2. The connection end between the pipe body 1 and the sleeve 2 is provided with an annular sealing groove 3 and an external tapered thread 4. The annular sealing groove 3 is located at the end of the pipe body 1, and an O-ring 5 is provided within the annular sealing groove 3. The connection end between the sleeve 2 and the pipe body 1 is provided with an internal tapered thread 6 that matches the external tapered thread 4. A thread sealing adhesive layer 7 is provided between the external tapered thread 4 and the internal tapered thread 6. A quick-connect groove 8 is provided at the non-connection end of the sleeve 2 and the pipe body 1. Figure 3 The sealing groove 3 in the middle is one. Figure 4 The sealing groove 3 in the middle has two parts. Figure 5 The sealing groove 3 in the middle has three parts.

[0013] like Figure 6 , Figure 7 As shown, the pipe bodies 1 are connected by flanges 9.

[0014] like Figure 8 As shown, the pipe bodies 1 are connected by quick connectors 10.

[0015] like Figure 9 As shown, the pipe bodies 1 are connected by K-type connectors 11.

[0016] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin tube. In use, an O-ring 5 is installed within the annular sealing groove 3, and a flame-retardant, anti-static anaerobic thread sealant layer 7 is coated onto the surface of the outer tapered thread 4. The inner tapered thread 6 of the sleeve 2 is tightened to the outer tapered thread 4 of the tube body 1, securing the tube body 1 and sleeve 2 together. At this point, the inner tapered thread 6 and the outer tapered thread 4, combined with the thread sealant layer 7, form the first sealing barrier. The O-ring 5, deformed under pressure within the annular sealing groove 3, forms the second sealing barrier. This double-sealing structure between the tube body 1 and sleeve 2 significantly improves sealing reliability and is suitable for harsh conditions such as high pressure and corrosive media. It allows for effective quick-connect coupling between non-metallic and metallic components. The detachable design facilitates maintenance and replacement, and the compact structure occupies little space.

[0017] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. The preferred taper of the external tapered thread 4 and the internal tapered thread 6 is 1:16 to 1:5; other tapers can be selected based on the working pressure of the joint and the lengths of the pipe body 1 and the sleeve 2. The thread sealing layer 7 is a flame-retardant and antistatic anaerobic thread sealant, which forms an elastic sealing layer after curing. The flame-retardant and antistatic anaerobic sealant uses a flame-retardant base material or adds flame-retardant materials to achieve flame-retardant properties, and uses conductive fillers or conductive agents to achieve antistatic properties. The O-ring seal 5 is made of fluororubber or hydrogenated nitrile rubber. The material of the O-ring seal 5 is antistatic, meets the requirements of MT181-1988, and has good chemical corrosion resistance. Depending on the needs, the width of the annular sealing groove 3 is 1 / 10 to 1 / 20 of the length of the sleeve 2, the distance of the annular sealing groove 3 from the end of the pipe body 1 is 10-20 mm, and there can be one, two, or three annular sealing grooves 3. When there is one annular sealing groove 3, it is suitable for pressures below 10MPa and is often used for coal mine water supply and drainage; when there are two annular sealing grooves 3, it is suitable for pressures from 10MPa to 20MPa and is often used for pressure pipelines, pressure equipment and long-distance liquid return in mines; when there are three annular sealing grooves 3, it is suitable for pressures above 20MPa and is often used for long-distance liquid supply in mines, etc.

[0018] This utility model provides a sealing connection structure for a steel-reinforced fiber-reinforced resin pipe. The non-connecting ends of the sleeve 2 and the pipe body 1 are equipped with a flange 9, a quick-connect coupling 10, or a K-type coupling 11. This allows the pipe bodies to be connected via flange connections, quick-connect couplings, or K-type couplings. When connected via flange 9, the carbon steel sleeve 2 is welded to a carbon steel flange of the corresponding pressure requirement. The pipe bodies are sealed with a metal spiral wound gasket and connected with bolts. When connected via quick-connect coupling 10, the carbon steel sleeve 2 is grooved and sealed with a sealing ring according to the pressure requirement, and connected with a grooved clamp. When connected via K-type coupling 11, a K-type coupling 11 is welded to the carbon steel sleeve 2 according to the pressure requirement, and the pipe bodies are connected using a quick coupling and a U-shaped pin.

[0019] The scope of protection of the sealing connection structure of the steel skeleton fiber reinforced resin tube provided by this utility model is not limited to the above-mentioned structure. Any modifications, equivalent substitutions and improvements made on the basis of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A sealing connection structure for a steel-reinforced fiber-reinforced resin tube, comprising a tube body, characterized in that: The tube body is connected to the sleeve. The connection end between the tube body and the sleeve is provided with an annular sealing groove and an external tapered thread. An O-ring is provided in the annular sealing groove. The connection end between the sleeve and the tube body is provided with an internal tapered thread that matches the external tapered thread. A thread sealing adhesive layer is provided between the external tapered thread and the internal tapered thread.

2. The sealing connection structure of a steel-reinforced fiber-reinforced resin tube according to claim 1, characterized in that: The taper of the external tapered thread and the internal tapered thread is 1:16 to 1:

5.

3. The sealing connection structure of a steel-reinforced fiber-reinforced resin tube according to claim 1, characterized in that: The width of the annular sealing groove is 1 / 20 to 1 / 10 of the sleeve length, and the distance between the annular sealing groove and the end of the pipe body is 10-20 mm.

4. The sealing connection structure of a steel-reinforced fiber-reinforced resin tube according to claim 1, characterized in that: The annular sealing groove may be one, two, or three.

5. The sealing connection structure of a steel-reinforced fiber-reinforced resin tube according to claim 1, characterized in that: The non-connecting ends of the sleeve and the pipe body are provided with flanges, quick-connect fittings or K-type fittings.

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