A leak-proof and high-pressure-resistant socket and spigot threaded joint and aging detection device

Abstract

The present invention discloses a leak-proof and high-pressure-resistant socket screw joint and an aging detection device, which relates to the technical field of pipeline physical detection. It includes a composite pipe, and a socket joint is arranged on the outer wall of the composite pipe. The socket joint includes an injection molding flange, and the injection molding flange is a ring structure. The injection molding flange is fixedly connected to the outer wall of the composite pipe. A sealing ring is in contact with one side of the injection molding flange. The injection molding flange and the sealing ring are used to seal the inside of the composite pipe. By setting the socket joint, the structure in which the composite pipe and the injection molding flange of the end injection molding part are combined into one in the form of injection molding is not weaker than the traditional flange form in terms of wear resistance. The same is true that only the wear-resistant material is in contact with the conveying medium, and it avoids the problems of insufficient tightness caused by warping of the existing flange form and the possible occurrence of medium interlayer phenomenon, greatly improving the use stability and service life.

Description

Technical Field

[0001] The present invention relates to the technical field of physical detection of pipelines, and particularly to an anti-leakage and high-pressure-resistant socket screw joint and an aging detection device. Background Technique

[0002] With the rapid development of modern industrialization and urbanization, pipeline systems play a crucial role in multiple industries and fields. Especially in the fields of petroleum, chemical industry, construction, water supply and drainage, and mines, there are extremely high application requirements, and pipeline joints directly affect the safety and stability of the entire pipeline system. Although traditional flange joints and screw joints meet the basic connection requirements to a certain extent, their performance is often greatly limited in the face of relatively harsh working conditions such as high pressure, high wear, and strong corrosion. The common solutions are, one is to replace materials and use higher-cost high-performance materials to avoid rapid corrosion or wear, such as replacing with duplex stainless steel, nickel-based alloy steel, or titanium alloy, etc.; the second is to perform surface treatment and attach a corrosion-resistant and wear-resistant coating on the surface of the metal joint. Common methods include electrophoresis, galvanizing, chrome plating, or laser cladding; the third is to use a flanging process in combination with a flanged joint for connection, which is also a method commonly used in the mining field. This type of joint realizes a full-bore inner diameter through the inner lining wear-resistant layer flanging process, and the internal conveying medium does not come into contact with other structural layers except the wear-resistant layer. This type of joint is currently the most widely used and is a widely recognized joint form.

[0003] A pipeline internal corrosion detection device for a pressure pipeline described in the patent application with the publication number CN119246686A, specifically a pipeline internal corrosion detection device for a pressure pipeline, includes a flaw detector. An ultrasonic probe for scanning the pipeline is fixedly connected to the lower outer surface of the flaw detector. A connection kit for bundling the flaw detector on the pipeline to be detected is provided on one outer surface of the flaw detector. The connection kit consists of two groups of chains. A cross bar is fixedly connected between the two groups of chains. A hook for docking with the cross bar is connected to the other outer surface of the flaw detector. A moving component for driving the flaw detector to move on the pipeline is provided on the lower outer surface of the flaw detector;

[0004] Although the existing technologies can handle some basic corrosion and wear conditions, there are still quite significant limitations. First, for the method of using higher-cost high-performance materials, the most obvious drawback is the high cost, which is not an economical approach. For the method of surface treatment, not only are the processes complex, the preparation cycle is long, but the cost is also very high, and the applicability in actual applications is very poor. For the third most commonly used flanged joint form, since the maximum design pressure of the flanged joint in the currently effective standard is only 4 MPa, in actual large-diameter and high-pressure conditions, leakage phenomena such as damage to the sealing gasket often occur. In addition, for the threaded connection form, under the requirements of larger diameter and higher pressure, the nuts used for connection are usually bulky, and due to the limitations of the joint form and the thread profile of the large-diameter seal thread, without meeting the requirement of high coaxiality, the installation difficulty is high, and the manufacturing cost is also not low, imposing a heavy cost burden on the pipeline system with a long overall length. Moreover, during the flange connection and threaded installation processes, aligning the axis is the basis of the connection and installation. If the coaxiality cannot be guaranteed, the connection between the flange bolts and the threaded nuts will be greatly affected, and improper installation and fastening will lead to leakage. The industry is also deeply affected by the drawbacks of traditional connection methods and is actively exploring new connection forms with stronger reliability and applicability;

[0005] Therefore, in multiple industries and fields, there is an urgent need for a joint form that is applicable to large-diameter and high-pressure, has excellent sealing performance, can be installed quickly, and is corrosion-resistant and wear-resistant. Based on this, this research has invented an anti-wear, corrosion-resistant, high-pressure-resistant, and quick socket-welding flanged joint, which can take into account the advantages of the flanged joint of the flanging form while solving the corresponding application drawbacks;

[0006] At the same time, after two relatively large composite pipes are connected, they are fixed to a fixed bracket or a specified position using specified buckles. Over time, the buckles and the clamps for holding the pipes will age, causing the originally coaxial position of the joint between the two pipes to deviate, resulting in the twisting of the joint between the two pipes. Long-term twisting will cause wear and deformation of the pipe joint, leading to an increase in its joint seam and leakage problems. Summary of the Invention

[0007] In view of the deficiencies of the existing technology, the present invention provides an anti-leakage, high-pressure-resistant socket-welding threaded joint and an aging detection device, achieving the purpose of solving the above problems.

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: An anti-leakage, high-pressure-resistant socket-welding threaded joint, comprising a composite pipe, and an insertion joint is arranged on the outer wall of the composite pipe. The insertion joint includes:

[0009] Injection molding flanging, the injection molding flanging is a ring structure, the injection molding flanging is fixedly connected to the outer wall of the composite pipe, one side of the injection molding flanging is in contact with a sealing ring, and the injection molding flanging and the sealing ring are used to seal the inside of the composite pipe;

[0010] The first sleeve, the first sleeve is sleeved on the outer wall of the composite pipe, a first plug-in member is fixedly connected to the outer wall of the first sleeve, a second plug-in member is in contact with one side of the first plug-in member, a second sleeve is fixedly connected to the inner wall of the second plug-in member, the second sleeve is sleeved on the outer wall of the composite pipe, and a nut is threadedly connected to the outer walls of the first plug-in member and the second plug-in member.

[0011] Preferably, a first sealing washer groove is opened at one end of the second plug-in member, a sealing strip is used to be added inside the first sealing washer groove, a second sealing washer groove is opened at one end of the second sleeve, a sealing strip is used to be added inside the second sealing washer groove, and the sealing strip is used to improve the sealing performance.

[0012] An aging detection device for a leak-proof and high-pressure-resistant socket screw joint, an aging detection mechanism is arranged on the outer wall of the nut, the aging detection mechanism includes a fixed ring, the inner wall of the fixed ring is fixedly connected to the outer wall of the nut, a first annular sleeve is arranged on the outer wall of the nut, a first magnetic ring and a second magnetic ring are respectively in contact with two sides of the fixed ring, and one side of the first magnetic ring is fixedly connected to one side of the first annular sleeve.

[0013] Preferably, a second annular sleeve is arranged on the outer wall of the nut, one side of the second annular sleeve is fixedly connected to one side of the second magnetic ring, the first magnetic ring and the second magnetic ring have magnetism, the magnetism on the opposite sides of the first magnetic ring and the second magnetic ring is attracted by opposite poles, and the first annular sleeve and the second annular sleeve can be attached to the fixed ring by the magnetic attraction of the first magnetic ring and the second magnetic ring.

[0014] Preferably, a first annular plate is fixedly connected to the outer wall of the second annular sleeve, a fixed rod is fixedly connected to one side of the first annular plate, a second annular plate is fixedly connected to the outer wall of the first annular sleeve, and a connecting sleeve is fixedly connected to one side of the second annular plate.

[0015] Preferably, an elastic sleeve is fixedly connected to the inner wall of the connecting sleeve, the elastic sleeve is made of rubber material, and the outer wall of the fixed rod is in contact with the inner wall of the elastic sleeve.

[0016] Preferably, a scale detection mechanism is arranged on the outer wall of the first annular plate, the scale detection mechanism includes a hinge block, a rotating shaft is rotatably connected to the inner wall of the hinge block, a circular plate is fixedly connected to one end of the rotating shaft, a torsion spring is fixedly connected between the circular plate and the hinge block, and a hinge rod is fixedly connected to the outer wall of the rotating shaft.

[0017] Preferably, a square block is fixedly connected to the outer wall of the second annular plate. A scale groove is formed on one side of the square block. A scale plate is fixedly connected to the outer wall of the hinge rod. A groove is formed on the outer wall of the hinge rod. A pointed plate is fixedly connected to the surface of the groove. The pointed plate is used to reduce the friction force with the second annular plate.

[0018] The present invention provides a leak-proof and high-pressure-resistant socket and spigot threaded joint and aging detection device, having the following beneficial effects:

[0019] 1. By providing a socket and spigot joint, the present invention makes the structure that integrally combines the composite pipe and the injection-molded flange at the end part of the injection molding in an injection molding form not weaker than the traditional flange form in terms of wear resistance. The same is true that only the wear-resistant material contacts the conveying medium, and it avoids the problems of insufficient tightness caused by warping of the existing flange form and the possible occurrence of medium interlayer phenomenon, greatly improving the use stability and service life.

[0020] 2. By providing a socket and spigot joint, compared with the disadvantage that it is very difficult to align the axis during installation in the traditional connection method, resulting in great installation construction difficulty, the present invention designs a tapered socket at the end of the first socket and the second socket, with a special angle design, which not only ensures smooth socket connection but also ensures secondary sealing. After aligning the axis, it is very convenient to install and connect the nut, and the installation efficiency can be significantly improved.

[0021] 3. By providing a socket and spigot joint, the traditional joint sealing methods are all single-seal. The joints in the form of threaded nuts usually use polytetrafluoroethylene gaskets, and the joints in the form of flanged flanges usually use rubber gaskets. However, due to the design of the joint form, it is easy for the gasket to be blown away or damaged due to high pressure, resulting in poor sealing performance. While the present invention uses the end of the socket joint, and the circumferential groove fixes the rubber washer to prevent it from being blown away by high-pressure fluid. Moreover, a first sealing washer groove is designed at the end of the first socket and the second socket, and a fluororubber sealing ring is used for secondary sealing to further isolate the possibility of mutual penetration of internal and external media, and the sealing performance is more stable.

[0022] 4. By providing a socket and spigot joint, due to the limitations of the traditional joint design, considering aspects such as sealing performance and pressure resistance, it is usually only applicable to pipelines with small and medium diameters and medium and low pressures, and there is almost no application in the fields of large diameters and higher pressures. While the joint type of the present invention, due to its unique structural design and double-seal form, can meet normal use in the fields of larger diameters and higher pressures.

[0023] 5. By providing socket joints, since the traditional flanged joints have a relatively low pressure rating, an integral forming process is usually used when preparing the flange sleeves. Due to the large size of the end of the joint sleeve, the size of the blank material is large in the actual preparation process, resulting in higher costs. However, due to the special joint structure design of the present invention, it can meet higher pressure requirements, and the socket sleeve is made by welding the internal first sleeve, second sleeve and the external first plug-in part and second plug-in part, which will not affect the use performance, and avoids the use of high-cost blank materials, thus reducing the preparation cost.

[0024] 6. By providing an aging detection mechanism, when several fixing rods on the first annular plate are aligned with the connecting sleeve and inserted, it indicates that the second annular sleeve and the second annular plate are in a mutually horizontal state, thus realizing the automatic detection function after the two composite pipes are butt-jointed and installed. It can ensure that the two composite pipes and the connected joints are on the same straight line without deviation. Once deviation occurs, each fixing rod cannot be exactly inserted into the connecting sleeve, thus completing the self-inspection function after installation.

[0025] 7. By providing an aging detection mechanism, if the fixing rod is displaced in the connecting sleeve, it will squeeze tightly against a certain part of an elastic sleeve. At this time, the large extrusion friction force between the elastic sleeve and the outer wall of the fixing rod will make it difficult for the staff to push the first annular sleeve and the second annular sleeve closer to each other. Then, the staff can further judge the accuracy of the connection between the two composite pipes by the resistance when pushing and pulling the first annular sleeve and the second annular sleeve, so as to ensure that the two composite pipes are on the same axis.

[0026] 8. By providing an aging detection mechanism, it can be judged by observing whether the fixing rod can be withdrawn from the connecting sleeve whether the axis of the two connected composite pipes has shifted. Once the two composite pipes are not on the same axis, it means that the inside of the connected joint will be deformed and distorted, which will easily accelerate the possibility of aging deformation and leakage, facilitating the staff to quickly check and observe the composite pipes. Before using a professional ultrasonic instrument to detect them one by one, the rapid pre-detection function of the composite pipes can be realized.

[0027] 9. By providing an aging detection mechanism, when the two composite pipes are displaced, the hinged rods resting on the second annular plate will lift upwards towards one side. By visually observing each hinged rod on the first annular plate and the second annular plate, it can be quickly observed and judged whether the connection of the composite pipes is distorted and needs to be replaced, detected and repaired, facilitating the timely detection and repair of the pipeline. Also, in a more convenient way, it enables the staff to have sufficient enthusiasm and work efficiency for regular inspection, detection and repair.

[0028] 10. By providing a scale detection mechanism, when an observer discovers the connection distortion problem of the composite pipe by pulling the first annular sleeve and the second annular sleeve, the angle of rotation and offset of the scale plate on the circular plate can be accurately judged according to the positions of the scale plates on both sides of the hinge rod and the scale on the square block. Subsequently, the specific degree of the offset of the axes of the two composite pipes can be quickly estimated, so that different detection and repair measures can be specifically taken according to their different offset states, ensuring the high efficiency of the detection and repair work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present invention;

[0030] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0031] Figure 3 is of the present invention Figure 2 magnified view at A;

[0032] Figure 4 is a schematic cross-sectional structure of the socket joint of the present invention Figure 1 ;

[0033] Figure 5 is a schematic cross-sectional structure of the socket joint of the present invention Figure 2 ;

[0034] Figure 6 is a schematic cross-sectional structure of the socket joint of the present invention Figure 3 ;

[0035] Figure 7 is a schematic structural diagram of the aging detection mechanism of the present invention;

[0036] Figure 8 is of the present invention Figure 6 magnified view at B;

[0037] Figure 9 is a schematic structural diagram of the connecting sleeve of the present invention;

[0038] Figure 10 is a schematic structural movement diagram of the aging detection mechanism of the present invention Figure 1 ;

[0039] Figure 11 is of the present invention Figure 10 magnified views at C and D;

[0040] Figure 12 is a schematic structural movement diagram of the aging detection mechanism of the present invention Figure 2 ;

[0041] Figure 13 is a schematic structural diagram of the scale detection mechanism of the present invention;

[0042] Figure 14 Schematic diagram of the disassembled structure of the scale detection mechanism of the present invention;

[0043] Figure 15 Partial structure schematic diagram of the scale detection mechanism of the present invention.

[0044] In the figure: 1 composite pipe, 2 socket joint, 201 injection molding flange, 202 sealing ring, 203 first sleeve, 204 second sleeve, 205 first plug-in part, 206 second plug-in part, 207 first sealing washer groove, 208 nut, 209 second sealing washer groove, 3 aging detection mechanism, 301 first annular sleeve, 302 first magnetic ring, 303 fixing ring, 304 second magnetic ring, 305 second annular sleeve, 306 first annular plate, 307 fixing rod, 308 second annular plate, 309 connecting sleeve, 310 elastic sleeve, 4 scale detection mechanism, 401 hinge block, 402 rotating shaft, 403 hinge rod, 404 circular plate, 405 scale plate, 406 square block, 407 groove, 408 pointed plate. Detailed implementation manners

[0045] Example 1: Please refer to Figure 1-6 , the present invention provides a technical solution: an anti-leakage and high-pressure-resistant socket thread joint, including a composite pipe 1, and a socket joint 2 is arranged on the outer wall of the composite pipe 1. The socket joint 2 includes:

[0046] An injection molding flange 201, the injection molding flange 201 is a ring structure, the injection molding flange 201 is fixedly connected to the outer wall of the composite pipe 1, a sealing ring 202 is in contact with one side of the injection molding flange 201, and the injection molding flange 201 and the sealing ring 202 are used to seal the inside of the composite pipe 1;

[0047] A first sleeve 203, the first sleeve 203 is sleeved on the outer wall of the composite pipe 1, a first plug-in part 205 is fixedly connected to the outer wall of the first sleeve 203, a second plug-in part 206 is in contact with one side of the first plug-in part 205, a second sleeve 204 is fixedly connected to the inner wall of the second plug-in part 206, the second sleeve 204 is sleeved on the outer wall of the composite pipe 1, and a nut 208 is threadedly connected to the outer walls of the first plug-in part 205 and the second plug-in part 206.

[0048] A first sealing washer groove 207 is opened at one end of the second plug-in part 206, a sealing strip is used to be added inside the first sealing washer groove 207, a second sealing washer groove 209 is opened at one end of the second sleeve 204, a sealing strip is used to be added inside the second sealing washer groove 209, and the sealing strip is used to improve the sealing performance;

[0049] During use, the inner wall of the composite pipe 1 is a wear-resistant layer of the composite pipe, which is a structural layer in contact with the transmission medium and plays a wear-resistant role; the first sleeve 203 and the second sleeve 204 play a role in clamping and installing with the pipeline. Their outer walls are made into a first plug-in part 205 and a second plug-in part 206 in a welding form, and a first sealing washer groove 207 and a second sealing washer groove 209 are opened at specific positions for installing a sealing washer to play a secondary sealing role;

[0050] Embodiment 2: Please refer to Figure 1-12 , on the basis of Embodiment 1, the present invention provides a technical solution: an aging detection device for a leak-proof and high-pressure-resistant socket screw joint. An aging detection mechanism 3 is provided on the outer wall of the nut 208. The aging detection mechanism 3 includes a fixing ring 303. The inner wall of the fixing ring 303 is fixedly connected to the outer wall of the nut 208. A first annular sleeve 301 is provided on the outer wall of the nut 208. A first magnetic ring 302 and a second magnetic ring 304 are respectively in contact with both sides of the fixing ring 303. One side of the first magnetic ring 302 is fixedly connected to one side of the first annular sleeve 301.

[0051] A second annular sleeve 305 is provided on the outer wall of the nut 208. One side of the second annular sleeve 305 is fixedly connected to one side of the second magnetic ring 304. The first magnetic ring 302 and the second magnetic ring 304 have magnetism, and the magnetism on the opposite sides of the first magnetic ring 302 and the second magnetic ring 304 is attracted by opposite poles. The first annular sleeve 301 and the second annular sleeve 305 can be attached to the fixing ring 303 by the magnetic attraction of the first magnetic ring 302 and the second magnetic ring 304.

[0052] A first annular plate 306 is fixedly connected to the outer wall of the second annular sleeve 305. A fixing rod 307 is fixedly connected to one side of the first annular plate 306. A second annular plate 308 is fixedly connected to the outer wall of the first annular sleeve 301. A connecting sleeve 309 is fixedly connected to one side of the second annular plate 308.

[0053] An elastic sleeve 310 is fixedly connected to the inner wall of the connecting sleeve 309. The elastic sleeve 310 is made of rubber material. The outer wall of the fixing rod 307 is in contact with the inner wall of the elastic sleeve 310;

[0054] The nut 208 is threadedly installed on the outer walls of the first connector 205 and the second connector 206, mainly playing a role in connecting the first connector 205 and the second connector 206, thereby fastening the first sleeve 203 and the second sleeve 204 on the injection-molded flange 201, and completing the installation of the first sleeve 203 and the second sleeve 204 on the composite pipe 1; the first connector 205 and the second connector 206 are annular structures and are also connected to the outer walls of the first sleeve 203 and the second sleeve 204 by welding. Their ends are designed with a special angle, which can achieve quick socket connection and ensure that the secondary sealing washer can be tightly installed in the sealing washer groove; the sealing ring 202 is used for sealing the pipe end face and is the main sealing method at the end of the pipe joint; the injection-molded flange 201 is an injection-molded part formed by injection molding the joint end of the composite pipe 1 and the pipe wear-resistant layer, and part of it is in the form of a flange.

[0055] When docking two composite pipes 1 with the injection-molded flanges 201 between them, first insert the sealing ring 202, then install the first sleeve 203 and the second sleeve 204 on the outer wall of the composite pipe 1, and make one side of the first sleeve 203 close to one side of the second sleeve 204 against the injection-molded flange 201. The second sleeve 204 on its outer wall is inserted into the second connector 206. Subsequently, screw the nut 208 onto the outer walls of the first connector 205 and the second connector 206 to fasten the first connector 205, the second connector 206, the first sleeve 203, and the second sleeve 204. The injection-molded flanges 201 flanged out from the two composite pipes 1 are fastened through the first sleeve 203 and the second sleeve 204, thereby completing the connection work between the two composite pipes 1 in advance.

[0056] This structure that combines the composite pipe 1 with the injection-molded flange 201 of the end injection-molded part by injection molding is not weaker than the traditional flange form in terms of wear resistance. Similarly, only the wear-resistant material is in contact with the conveying medium, and it avoids the problems of insufficient sealing caused by warping of the existing flange form and possible medium interlayer phenomenon, greatly improving the use stability and service life.

[0057] Compared with the disadvantage that it is very difficult to align the axis during installation in the traditional connection method, resulting in great installation construction difficulty, the tapered socket designed at the ends of the first connector 205 and the second connector 206 in the present invention is designed with a special angle, which not only ensures smooth socket connection but also ensures secondary sealing. After aligning the axis, it will be very convenient to install and connect the nut, and the installation efficiency can be significantly improved.

[0058] Embodiment Three: Please refer to Figure 1-15, on the basis of the first embodiment and the second embodiment, the present invention provides a technical solution: a scale detection mechanism 4 is provided on the outer wall of the first annular plate 306. The scale detection mechanism 4 includes a hinge block 401. A rotating shaft 402 is rotatably connected to the inner wall of the hinge block 401. One end of the rotating shaft 402 is fixedly connected to a circular plate 404. A torsion spring is fixedly connected between the circular plate 404 and the hinge block 401. An articulated rod 403 is fixedly connected to the outer wall of the rotating shaft 402.

[0059] A square block 406 is fixedly connected to the outer wall of the second annular plate 308. A scale groove is provided on one side of the square block 406. A scale plate 405 is fixedly connected to the outer wall of the articulated rod 403. A groove 407 is provided on the outer wall of the articulated rod 403. A pointed plate 408 is fixedly connected to the surface of the groove 407. The pointed plate 408 is used to reduce the friction with the second annular plate 308;

[0060] After the nut 208 is threadedly installed on the first connector 205 and the second connector 206, the tight connection of the two composite pipes 1 is completed. After the connection, the first annular sleeve 301 and the second annular sleeve 305 that were previously sleeved on the left and right composite pipes 1 are pushed onto the outer wall of the nut 208. The inner walls of the first annular sleeve 301 and the second annular sleeve 305 slide and approach on the outer wall of the nut 208, so that the first annular sleeve 301 and the second annular sleeve 305 abut against the fixed ring 303 on the outer wall of the nut 208, and the first magnetic ring 302 and the second magnetic ring 304 between the first annular sleeve 301 and the second annular sleeve 305 complete the abutment of the fixed ring 303, and the magnetic attraction between them completes the function of magnetic adsorption and close fixation;

[0061] At this time, the fixing rod 307 on one side of the first annular plate 306 on the second annular sleeve 305 will be inserted into the connecting sleeve 309 through the second annular plate 308. And when several fixing rods 307 on the first annular plate 306 are aligned with the connecting sleeve 309 and inserted, it means that the second annular sleeve 305 and the second annular plate 308 are in a mutually horizontal state, then the automatic detection function after the mutual butt joint installation of the two composite pipes 1 is realized, which can ensure that the two composite pipes 1 and the connected joints are connected in a straight line without the problem of position deviation. Once there is a deviation, each fixing rod 307 cannot be exactly inserted into the connecting sleeve 309, thus completing the self-inspection function after its installation;

[0062] The inner wall of the connecting sleeve 309 is provided with a plurality of elastic sleeves 310. Therefore, when the fixing rod 307 is inserted into the connecting sleeve 309, it will be slightly resisted by the elastic sleeve 310 made of elastic material, so that when the first annular sleeve 301 and the second annular sleeve 305 are brought close to each other, the fixing rod 307 will have a certain resistance when sliding back and forth on the inner wall of the connecting sleeve 309. If there is no problem in the insertion, the contact distance between the fixing rod 307 and each elastic sleeve 310 when entering the connecting sleeve 309 is the same, and the friction force is small. 09, a position shift occurs, then a certain place of a certain elastic sleeve 310 will be squeezed tightly, and at this time, the elastic sleeve 310 and the outer wall of the fixing rod 307 have a large squeezing friction, which will make it difficult for the staff to push the first annular sleeve 301 and the second annular sleeve 305 closer to each other. Then, the staff can further judge the accuracy of the connection between the two composite pipes 1 by the resistance when pushing and pulling the first annular sleeve 301 and the second annular sleeve 305, so as to ensure that the two composite pipes 1 can be on the same axis.

[0063] After the composite pipe 1 has been used for a long time, when it needs to be repaired and inspected, the staff will pull out and separate the second annular sleeve 305 from the first annular sleeve 301, and by observing whether the fixing rod 307 can be removed from the connecting sleeve 309, it can be judged whether the two connected composite pipes 1 have an axial deviation. Once the two composite pipes 1 are not on the same axial line, it means that the joints connected to each other will be deformed and distorted, which will easily accelerate the possibility of aging deformation and leakage, so that the staff can quickly inspect and observe the composite pipe 1. Before using professional ultrasonic instruments to inspect them one by one, the rapid pre-detection function of the composite pipe 1 can be realized;

[0064] If the two composite pipes 1 are on the same axis, the hinge rod 403 on the second annular plate 308 and the rotating shaft 402 will be in a horizontal state. Once the two composite pipes 1 are offset, the hinge rod 403 on the second annular plate 308 will be lifted and tilted to one side. By visually observing each hinge rod 403 on the first annular plate 306 and the second annular plate 308, it is possible to quickly observe and determine whether the composite pipe 1 connection is distorted and whether it needs to be replaced, inspected and repaired, which is convenient for timely inspection and maintenance of the pipeline. In addition, in a more convenient way, the staff can have sufficient enthusiasm for regular inspection, inspection and maintenance, as well as work efficiency.

[0065] When the observer finds the connection distortion problem of the composite pipe 1 by pulling the first annular sleeve 301 and the second annular sleeve 305, the observer can accurately judge the rotation offset angle of the scale plate 405 on the circular plate 404 according to the scale plate 405 on both sides of the hinge rod 403 and the position of the scale on the block 406, and then quickly infer the specific degree of the axis line offset between the two composite pipes 1, so that different detection and maintenance measures can be taken according to their different offset states, ensuring the efficiency of the detection and maintenance work. The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and its inventive concept of the present invention, is equivalently replaced or changed, which should be covered within the protection scope of the present invention.

Claims

1. An aging detection device for leak-proof and high-pressure resistant socket threaded joints, characterized in that: The aging detection mechanism (3) comprises an aging detection mechanism (3) arranged on the outer wall of a nut (208), the aging detection mechanism (3) comprising a fixing ring (303), the inner wall of the fixing ring (303) being fixedly connected to the outer wall of the nut (208), the outer wall of the nut (208) being provided with a first annular sleeve (301), the two sides of the fixing ring (303) being in contact with a first magnetic ring (302) and a second magnetic ring (304) respectively, and one side of the first magnetic ring (302) being fixedly connected to one side of the first annular sleeve (301); The outer wall of the nut (208) is provided with a second annular sleeve (305), one side of the second annular sleeve (305) is fixedly connected to one side of the second magnetic ring (304), the first magnetic ring (302) and the second magnetic ring (304) are magnetic, the magnetism of the first magnetic ring (302) and the second magnetic ring (304) on the opposite side is that opposite poles attract each other, and the first annular sleeve (301) and the second annular sleeve (305) can be fitted with the fixing ring (303) by utilizing the magnetic attraction between the first magnetic ring (302) and the second magnetic ring (304); The outer wall of the second annular sleeve (305) is fixedly connected to a first annular plate (306), one side of the first annular plate (306) is fixedly connected to a fixing rod (307), the outer wall of the first annular sleeve (301) is fixedly connected to a second annular plate (308), and one side of the second annular plate (308) is fixedly connected to a connecting sleeve (309); An elastic sleeve (310) is fixedly connected to the inner wall of the connecting sleeve (309); the elastic sleeve (310) is made of rubber; and the outer wall of the fixing rod (307) is in contact with the inner wall of the elastic sleeve (310).

2. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 1 is characterized in that: The outer wall of the first annular plate (306) is provided with a scale detection mechanism (4), the scale detection mechanism (4) comprising a hinge block (401), the inner wall of the hinge block (401) being rotatably connected to a rotating shaft (402), one end of the rotating shaft (402) being fixedly connected to a circular plate (404), a torsion spring being fixedly connected between the circular plate (404) and the hinge block (401), and the outer wall of the rotating shaft (402) being fixedly connected to a hinge rod (403).

3. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 2 is characterized in that: The outer wall of the second annular plate (308) is fixedly connected to a block (406), one side of the block (406) is provided with a scale groove, the outer wall of the hinge rod (403) is fixedly connected to a scale plate (405), the outer wall of the hinge rod (403) is provided with a groove (407), the surface of the groove (407) is fixedly connected to a pointed plate (408), and the pointed plate (408) is used to reduce friction between the second annular plate (308) and the second annular plate (308).

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