Leak-proof high-pressure-resistant socket screwed joint and aging detection device

Abstract

The invention discloses a leakproof high-pressure-resistant socket screwed joint and an aging detection device, and relates to the technical field of pipeline physical detection, the leakproof high-pressure-resistant socket screwed joint comprises a composite pipe, the outer wall of the composite pipe is provided with a socket joint, the socket joint comprises an injection molding flange, the injection molding flange is of an annular structure, the injection molding flange is fixedly connected to the outer wall of the composite pipe, and the outer wall of the composite pipe is fixedly connected with the socket joint. One side of the injection molding flanging is in contact with a sealing ring, the injection molding flanging and the sealing ring are used for sealing the interior of the composite pipe, and the bell and spigot joint is arranged, so that the composite pipe and the injection molding flanging at the end injection molding part are combined into a whole in an injection molding mode, and compared with a traditional flanging mode, the wear-resisting performance is not poor, and the wear-resisting performance is good. Similarly, only the wear-resistant material is in contact with the conveying medium, the phenomena that the sealing is not tight enough and the medium layer crossing phenomenon possibly occurs due to the fact that the edge of an existing flanging flange mode possibly warps are avoided, the use stability is greatly improved, and the service life is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline physical detection, in particular to a leakage-proof and high-pressure-resistant socket threaded joint and an aging detection device. Background Art

[0002] With the rapid development of modern industrialization and urbanization, pipeline systems play a vital role in many industries and fields. In particular, there are extremely high application demands in the fields of petroleum, chemical industry, construction, water supply and drainage, and mining, and pipeline joints directly affect the safety and stability of the entire pipeline system. Although traditional flange joints and threaded joints meet the basic connection requirements to a certain extent, their performance is often greatly limited when facing harsh working conditions such as high pressure, high wear, and strong corrosion. The common solutions are: first, replace materials and use higher-performance materials with higher costs to avoid excessive corrosion or wear, such as replacing duplex stainless steel, nickel-based alloy steel or titanium alloy, etc.; second, do surface treatment to attach a layer of corrosion-resistant and wear-resistant coating to the surface of the metal joint. Common methods include electrophoresis, galvanizing, chrome plating or laser cladding; third, use flanging technology in conjunction with flanging flange joints for connection, which is also a method currently used more in the mining field. This type of joint achieves a full inner diameter through the flanging process of the inner lining wear-resistant layer, and the internal conveying medium will not contact other structural layers except the wear-resistant layer. This type of joint is currently the most widely used and widely recognized type of joint.

[0003] A pipeline corrosion detection device for a pressure pipeline described in a patent application with a publication number of CN119246686A is specifically a pipeline corrosion detection device for a pressure pipeline, comprising a flaw detector, an ultrasonic probe for scanning the pipeline is fixedly connected to the outer surface of the lower end of the flaw detector, a connection kit for tying the flaw detector to the pipeline to be tested is provided on the outer surface of one side of the flaw detector, the connection kit is composed of two groups of chains, a cross bar is fixedly connected between the two groups of chains, and a hook connected to the cross bar is connected to the outer surface of the other side of the flaw detector; a moving component for driving the flaw detector to move on the pipeline is provided on the outer surface of the lower end of the flaw detector; Although the existing technology can cope with some basic corrosion and wear conditions, there are still considerable limitations. First of all, the most obvious disadvantage of using more expensive high-performance materials is that the cost is high, which is not an economical method; for the surface treatment method, not only is the process complicated and the preparation cycle long, but the cost is also very high, and the applicability of practical applications is very poor; the third most commonly used flange flange form, because the maximum design pressure of the flange flange in the current effective standard is only 4MPa, under the actual large-diameter and high-pressure working conditions, leakage such as sealing gasket damage often occurs; in addition, for the threaded connection form, under the demand for larger diameters and higher pressures, the connecting nuts are usually large in size, and due to the limitations of the joint form and the large-diameter sealing thread shape, the installation is difficult and the manufacturing cost is also not low if the higher coaxiality is not met. For the entire long pipeline system, the cost burden is heavy; not only that, in the process of flange connection and thread installation, aligning the axis is the basis of 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 tightening will lead to leakage. The industry is also deeply affected by the shortcomings of traditional connection methods and is actively exploring new, more reliable and applicable connection methods; Therefore, in many industries and fields, there is an urgent need for a joint form that is suitable for large-caliber and high-pressure, has excellent sealing performance, is quick to install, and is corrosion-resistant and wear-resistant. Based on this, this study invented a wear-resistant, corrosion-resistant, and high-pressure quick socket flange joint, which can take into account the advantages of the flanged flange joint while solving the corresponding application shortcomings; At the same time, after two larger composite pipes are connected, they are fixed to a fixed frame or a designated position using designated clips. Over time, the clips and the clamps that clamp the pipes will age, causing the joint between the two pipes to deviate from the original position of the same axial line, causing the joint between the two pipes to be twisted. Long twisting time will cause the pipe joint to wear and deform, causing the joint to become larger and leak. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a leakage-proof, high-pressure-resistant socket threaded joint and an aging detection device, which achieves the purpose of solving the above-mentioned problems.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a leak-proof and high-pressure resistant socket threaded joint, comprising a composite pipe, the outer wall of the composite pipe is provided with a socket joint, and the socket joint comprises: An injection-molded flange, the injection-molded flange is an annular structure, the injection-molded flange is fixedly connected to the outer wall of the composite pipe, one side of the injection-molded flange is in contact with a sealing ring, and the injection-molded flange and the sealing ring are used to seal the inside of the composite pipe; A first sleeve, the first sleeve is sleeved on the outer wall of the composite pipe, a first connector is fixedly connected to the outer wall of the first sleeve, a second connector is in contact with one side of the first connector, a second sleeve is fixedly connected to the inner wall of the second connector, the second sleeve is sleeved on the outer wall of the composite pipe, and a nut is threadedly connected to the first connector and the outer wall of the second connector.

[0006] Preferably, a first sealing gasket groove is formed at one end of the second connector, and a sealing strip is added inside the first sealing gasket groove; a second sealing gasket groove is formed at one end of the second sleeve, and a sealing strip is added inside the second sealing gasket groove, and the sealing strip is used to improve the sealing performance.

[0007] An aging detection device for a leak-proof and high-pressure resistant socket threaded joint, wherein an aging detection mechanism is arranged on the outer wall of the nut, the aging detection mechanism comprises a fixing ring, the inner wall of the fixing 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 in contact on both sides of the fixing ring, and one side of the first magnetic ring is fixedly connected to one side of the first annular sleeve.

[0008] Preferably, a second annular sleeve is provided 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 are magnetic, the magnetism of the first magnetic ring and the second magnetic ring on opposite sides is that opposite poles attract each other, and the first annular sleeve and the second annular sleeve can fit with the fixing ring by utilizing the magnetic attraction between the first magnetic ring and the second magnetic ring.

[0009] Preferably, the outer wall of the second annular sleeve is fixedly connected to a first annular plate, one side of the first annular plate is fixedly connected to a fixing rod, the outer wall of the second annular sleeve is fixedly connected to a second annular plate, one side of the second annular plate is fixedly connected to a connecting sleeve.

[0010] Preferably, an elastic sleeve is fixedly connected to the inner wall of the connecting sleeve, the elastic sleeve is made of rubber, and the outer wall of the fixing rod is in contact with the inner wall of the elastic sleeve.

[0011] Preferably, a scale detection mechanism is provided on the outer wall of the first annular plate, and the scale detection mechanism includes a hinge block, the inner wall of the hinge block is rotatably connected to a rotating shaft, one end of the rotating shaft is fixedly connected to a circular plate, a torsion spring is fixedly connected between the circular plate and the hinge block, and the outer wall of the rotating shaft is fixedly connected to a hinge rod.

[0012] Preferably, a block is fixedly connected to the outer wall of the second annular plate, a scale groove is provided on one side of the block, a scale plate is fixedly connected to the outer wall of the hinge rod, a groove is provided on the outer wall of the hinge rod, a pointed plate is fixedly connected to the surface of the groove, and the pointed plate is used to reduce friction between the second annular plate.

[0013] The present invention provides a leak-proof and high-pressure resistant socket threaded joint and an aging detection device, which have the following beneficial effects: 1. The present invention provides a socket joint, so that the composite pipe and the injection-molded flange of the end injection-molded part are combined into one structure in the form of injection molding. Compared with the traditional flange form, the wear resistance is only stronger, not weaker. Similarly, only the wear-resistant material is in contact with the conveying medium, and the existing flange flange form is avoided. The possible warping of the edge causes the sealing to be not tight enough and the possible medium layer cross-layer phenomenon, and the use stability and service life are greatly improved; 2. The present invention provides a socket joint, which is more difficult to install and construct than the traditional connection method, which is difficult to align the axis during installation. The present invention provides a taper socket at the end of the first connector and the second connector, which is designed at a special angle to ensure that the socket joint is smooth enough and the secondary seal is ensured. After aligning the axis, the nut installation connection will be very convenient, and the installation efficiency can be significantly improved. 3. The present invention sets a socket joint. Traditional joint sealing methods are all single seals. Joints in the form of threaded nut connection usually use polytetrafluoro gaskets, and joints in the form of flanged flanges usually use rubber gaskets. However, due to the design of the joint form, the gasket is easily blown away or damaged due to high pressure, and the sealing performance is poor. The present invention uses the end of the socket joint, and the annular groove fixes the rubber gasket to prevent it from being blown away by the high-pressure fluid. In addition, a first sealing gasket groove is designed at the end of the first connector and the second connector, and a fluororubber sealing ring is used for secondary sealing, which further isolates the possibility of mutual penetration of the internal and external media, and the sealing performance is more stable; 4. The present invention sets a socket joint. Due to the limitations of the joint design, the traditional joint type is usually only applicable to small and medium diameter, medium and low pressure pipelines in terms of sealing performance and pressure resistance performance. It is almost not used in large diameter and high pressure fields. However, due to the unique structural design and double sealing form, the joint type of the present invention can meet normal use in large diameter and high pressure fields. 5. The present invention sets a socket joint. Due to the low pressure level of the traditional flanged flange joint, an integrated molding process is usually used when preparing the flange sleeve. Since the end size of the joint sleeve is large, the size of the blank is large in the actual preparation process, and the cost is higher. However, the present invention can meet higher pressure requirements due to the special joint structure design, and the socket sleeve is welded by the internal first sleeve, the second sleeve and the external first connector, the second connector, which does not affect the performance, and avoids the use of high-cost blanks, and the preparation cost is lower.

[0014] 6. The present invention provides 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 horizontal state with each other, thereby realizing automatic detection of the two composite pipes after they are butt-jointed and installed. It can ensure that the two composite pipes are connected to the connecting joints in a straight line without position deviation. Once deviation occurs, each fixing rod cannot be inserted into the connecting sleeve exactly, thereby completing the self-inspection function after installation.

[0015] 7. The present invention provides an aging detection mechanism. If the fixing rod is displaced in the connecting sleeve, it will be squeezed tightly against a certain position of a certain elastic sleeve. At this time, the large squeezing friction 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 close to each other. Then, the staff can further judge the accuracy of the connection between the two composite tubes through the resistance when pushing and pulling the first annular sleeve and the second annular sleeve, so as to ensure that the two composite tubes can be on the same axis.

[0016] 8. The present invention sets an aging detection mechanism. By observing whether the fixing rod can be disengaged from the connecting sleeve, it can be judged whether the two connected composite pipes have an axial deviation. Once the two composite pipes are not on the same axial line, it means that deformation and distortion will occur inside the joints connected to each other, which will easily accelerate the possibility of aging deformation and leakage, making it convenient for staff to quickly inspect and observe the composite pipes. Before using professional ultrasonic instruments to detect them one by one, the rapid pre-detection function of the composite pipes can be realized.

[0017] 9. The present invention provides an aging detection mechanism. Once the two composite pipes are offset, the hinged rod on the second annular plate will be lifted and tilted to one side. By visually observing each hinged rod on the first annular plate and the second annular plate, it is possible to quickly observe and determine whether the composite pipe connection is distorted and whether it needs to be replaced, inspected and repaired. This facilitates timely inspection and maintenance of the pipelines, and in a more convenient way, enables the staff to have sufficient enthusiasm for regular inspections, inspections and repairs, as well as work efficiency.

[0018] 10. The present invention provides a scale detection mechanism. When an observer finds a connection distortion problem of the composite tube by pulling the first annular sleeve and the second annular sleeve, the observer can accurately judge the rotation offset angle of the scale plate on the circular plate according to the positions of the scale plates on both sides of the hinged rod and the scales on the block. Then, the specific degree of the offset of the axis line of the connection between the two composite tubes can be quickly inferred, so that different detection and maintenance measures can be taken according to the different offset states, thereby ensuring the high efficiency of the detection and maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic structural diagram of a cross section of the present invention; Figure 3 For the present invention Figure 2 A magnified image of point A; Figure 4 The cross-sectional structure of the socket joint of the present invention is shown in FIG. Figure 1 ; Figure 5 The cross-sectional structure of the socket joint of the present invention is shown in FIG. Figure 2 ; Figure 6 The cross-sectional structure of the socket joint of the present invention is shown in FIG. Figure 3 ; Figure 7 It is a structural schematic diagram of the aging detection mechanism of the present invention; Figure 8 For the present invention Figure 6 The enlarged view of point B; Fig. 9 It is a structural schematic diagram of the connecting sleeve of the present invention; Fig.10 The structural movement diagram of the aging detection mechanism of the present invention is shown in FIG. Figure 1 ; Fig.11 For the present invention Fig.10 Enlarged view of C and D; Fig.12 The structural movement diagram of the aging detection mechanism of the present invention is shown in FIG. Figure 2 ; Fig.13 It is a structural schematic diagram of the scale detection mechanism of the present invention; Fig.14 It is a schematic diagram of the disassembled structure of the scale detection mechanism of the present invention; Fig.15 It is a partial structural schematic diagram of the scale detection mechanism of the present invention.

[0020] In the figure: 1 composite pipe, 2 socket joint, 201 injection molding flange, 202 sealing ring, 203 first sleeve, 204 second sleeve, 205 first connector, 206 second connector, 207 first sealing gasket groove, 208 nut, 209 second sealing gasket 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 round plate, 405 scale plate, 406 square, 407 groove, 408 pointed plate. DETAILED DESCRIPTION

[0021] Example 1: Please refer to Figure 1-6 The present invention provides a technical solution: a leak-proof and high-pressure resistant socket threaded joint, comprising a composite pipe 1, a socket joint 2 is arranged on the outer wall of the composite pipe 1, and the socket joint 2 comprises: Injection molding flange 201, the injection molding flange 201 is an annular structure, the injection molding flange 201 is fixedly connected to the outer wall of the composite pipe 1, and one side of the injection molding flange 201 is in contact with a sealing ring 202, and the injection molding flange 201 and the sealing ring 202 are used to seal the inside of the composite pipe 1; The first sleeve 203 is sleeved on the outer wall of the composite pipe 1, the outer wall of the first sleeve 203 is fixedly connected with the first connector 205, one side of the first connector 205 contacts with the second connector 206, the inner wall of the second connector 206 is fixedly connected with the second sleeve 204, the second sleeve 204 is sleeved on the outer wall of the composite pipe 1, and the first connector 205 and the outer wall of the second connector 206 are threadedly connected with a nut 208.

[0022] A first sealing gasket groove 207 is formed at one end of the second plug-in component 206, and a sealing strip is added inside the first sealing gasket groove 207; a second sealing gasket groove 209 is formed at one end of the second sleeve 204, and a sealing strip is added inside the second sealing gasket groove 209, and the sealing strip is used to improve the sealing performance; When in use, the inner wall of the composite pipe 1 is a composite pipe wear-resistant layer, 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 of buckling and installation between the pipeline, and the outer wall thereof is made into a first plug-in connector 205 and a second plug-in connector 206 in the form of welding, and a first sealing gasket groove 207 and a second sealing gasket groove 209 are opened at specific positions for installing sealing gaskets to play a secondary sealing role; Example 2: Please refer to Figure 1-12 On the basis of the first embodiment, the present invention provides a technical solution: an aging detection device for a leak-proof and high-pressure resistant socket threaded joint, an aging detection mechanism 3 is arranged 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 arranged on the outer wall of the nut 208, and the first magnetic ring 302 and the second magnetic ring 304 are in contact on both sides of the fixing ring 303, and one side of the first magnetic ring 302 is fixedly connected to one side of the first annular sleeve 301.

[0023] A second annular sleeve 305 is provided on the outer wall of the nut 208, and 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, and the magnetism of the opposite sides of the first magnetic ring 302 and the second magnetic ring 304 is that opposite poles attract each other. The first annular sleeve 301 and the second annular sleeve 305 can utilize the magnetic attraction between the first magnetic ring 302 and the second magnetic ring 304 to fit with the fixed ring 303.

[0024] The outer wall of the second annular sleeve 305 is fixedly connected to the first annular plate 306 , one side of the first annular plate 306 is fixedly connected to the fixing rod 307 , the outer wall of the second annular sleeve 305 is fixedly connected to the second annular plate 308 , one side of the second annular plate 308 is fixedly connected to the connecting sleeve 309 .

[0025] The inner wall of the connecting sleeve 309 is fixedly connected with an elastic sleeve 310, 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; The nut 208 is threadedly installed on the outer wall of the first plug-in piece 205 and the second plug-in piece 206, and mainly serves to connect the first plug-in piece 205 and the second plug-in piece 206, so as to fasten the first sleeve 203 and the second sleeve 204 to the injection molding flange 201, and complete the installation of the first sleeve 203 and the second sleeve 204 on the composite pipe 1; the first plug-in piece 205 and the second plug-in piece 206 are annular structures, which are also connected to the outer wall of the first sleeve 203 and the second sleeve 204 by welding, and the ends thereof are designed with special angles, which can realize quick socket connection and ensure that the secondary sealing gasket can be tightly installed in the sealing gasket groove; the sealing ring 202 is used for sealing the end face of the pipeline, and is the most important sealing method at the end of the pipe joint; the injection molding flange 201 is the injection molding part formed by the joint end of the composite pipe 1 and the wear-resistant layer of the pipeline by injection molding, and part of it is in the form of a flange; When the two composite pipes 1 are butted with the injection molding flanges 201 between them, the sealing ring 202 is inserted in advance, and then the first sleeve 203 and the second sleeve 204 are installed on the outer wall of the composite pipe 1, and one side of the first sleeve 203 and one side of the second sleeve 204 are close to the injection molding flange 201, and the second sleeve 204 with its outer wall and the second plug-in connector 206 are plugged together, and then the nut 208 is screwed on the outer walls of the first plug-in connector 205 and the second plug-in connector 206 to complete the fastening of the first plug-in connector 205 and the second plug-in connector 206 and the first sleeve 203 and the second sleeve 204, and the injection molding flanges 201 of the two composite pipes 1 are fastened by the first sleeve 203 and the second sleeve 204, so as to perform the connection work between the two composite pipes 1 in advance; The structure in which the composite pipe 1 is combined with the injection-molded flange 201 at the end injection-molded part by injection molding is stronger than the traditional flange in terms of wear resistance, and only the wear-resistant material is in contact with the conveying medium. The existing flange flange form avoids the possibility of warping and the medium layer cross-layer phenomenon, and the stability and service life are greatly improved. Compared with the disadvantage of the traditional connection method that it is difficult to align the axis during installation, which makes installation and construction very difficult, the taper socket designed at the end of the first connector 205 and the second connector 206 of the present invention is designed at a special angle to ensure that the socket connection is smooth enough and the secondary seal is ensured. After aligning the axis, it will be very convenient to install the nut and connect, and the installation efficiency can be significantly improved; Example 3: Please refer to Figure 1-15 On the basis of Embodiment 1 and Embodiment 2, the present invention provides a technical solution: a scale detection mechanism 4 is arranged on the outer wall of the first annular plate 306, and the scale detection mechanism 4 comprises a hinge block 401, and the inner wall of the hinge block 401 is rotatably connected with a rotating shaft 402, and one end of the rotating shaft 402 is fixedly connected with a circular plate 404, a torsion spring is fixedly connected between the circular plate 404 and the hinge block 401, and the outer wall of the rotating shaft 402 is fixedly connected with a hinge rod 403.

[0026] The outer wall of the second annular plate 308 is fixedly connected with 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 with 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 with a sharp plate 408, and the sharp plate 408 is used to reduce the friction between the second annular plate 308; After the nut 208 is threadedly installed on the first plug-in piece 205 and the second plug-in piece 206, the two composite pipes 1 are tightly connected. After the connection, the first annular sleeve 301 and the second annular sleeve 305 which are 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 fixing ring 303 on the outer wall of the nut 208, and the fixing ring 303 is abutted by the first magnetic ring 302 and the second magnetic ring 304 between the first annular sleeve 301 and the second annular sleeve 305, and the magnetic attraction between them completes the effect of magnetic attraction and close fixation. At this time, the fixing rod 307 on the side of the first annular plate 306 on the second annular sleeve 305 will be inserted through the second annular plate 308 and inserted into the connecting sleeve 309. 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, and the automatic detection function of the two composite pipes 1 after mutual docking and installation is realized, which can ensure that the two composite pipes 1 are connected to the connecting joints in a straight line without the problem of position deviation. Once the deviation occurs, each fixing rod 307 cannot be inserted into the connecting sleeve 309, thereby completing the self-checking function after its installation; 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. 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; 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. 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 position of the scale plates 405 on both sides of the hinge rod 403 and the scales on the block 406, and then quickly infer the specific degree of the deviation of the axis line of the connection between the two composite pipes 1, so that different detection and maintenance measures can be taken according to the different deviation states, thereby ensuring the high efficiency of the detection and maintenance work.

[0027] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A leak-proof and high-pressure resistant socket threaded joint, comprising a composite pipe (1), characterized in that: The outer wall of the composite pipe (1) is provided with a socket joint (2), and the socket joint (2) comprises: An injection-molded flange (201), the injection-molded flange (201) being an annular structure, the injection-molded flange (201) being fixedly connected to the outer wall of the composite tube (1), one side of the injection-molded flange (201) being in contact with a sealing ring (202), the injection-molded flange (201) and the sealing ring (202) being used to seal the interior of the composite tube (1); A first sleeve (203), the first sleeve (203) being sleeved on the outer wall of the composite pipe (1), the outer wall of the first sleeve (203) being fixedly connected to a first plug connector (205), one side of the first plug connector (205) being in contact with a second plug connector (206), the inner wall of the second plug connector (206) being fixedly connected to a second sleeve (204), the second sleeve (204) being sleeved on the outer wall of the composite pipe (1), and a nut (208) being threadedly connected to the outer walls of the first plug connector (205) and the second plug connector (206).

2. A leak-proof and high-pressure resistant socket threaded joint according to claim 1, characterized in that: A first sealing gasket groove (207) is formed at one end of the second connector (206), and a sealing strip is added inside the first sealing gasket groove (207). A second sealing gasket groove (209) is formed at one end of the second sleeve (204), and a sealing strip is added inside the second sealing gasket groove (209), and the sealing strip is used to improve the sealing performance.

3. An aging detection device for a leak-proof and high-pressure resistant socket threaded joint, according to the leak-proof and high-pressure resistant socket threaded joint according to any one of claims 1-2, characterized in that: The outer wall of the nut (208) is provided with an aging detection mechanism (3), 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), and one side of the first magnetic ring (302) being fixedly connected to one side of the first annular sleeve (301).

4. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 3 is characterized in that: 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 utilize the magnetic attraction between the first magnetic ring (302) and the second magnetic ring (304) to fit with the fixing ring (303).

5. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 4 is characterized in that: 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 second annular sleeve (305) 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).

6. The aging detection device for a leak-proof and high-pressure-resistant socket threaded joint according to claim 5, characterized in that: 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).

7. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 6, 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).

8. The aging detection device for a leak-proof and high-pressure resistant socket threaded joint according to claim 7, 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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