Connector structure of stainless steel oil pipe and using method of connector structure

Abstract

The invention relates to the technical field of oil pipe connectors, and discloses a connector structure of a stainless steel oil pipe and a using method thereof.The connector structure comprises a body, a nut is in threaded connection with the outer surface of the body, and a clamping sleeve is slidably connected into the nut. When the inner wall of the main body is extruded, counter-acting force generated by the inner wall of the main body pushes the interior of the conical sleeve through the first sliding plate and the second sliding plate, so that the conical sleeve makes close contact with an oil pipe, meanwhile, friction force between the conical sleeve and the oil pipe is increased, and it is helpful for preventing the connector from loosening in the using process; and meanwhile, when the oil pipe is subjected to tensile force, the conical sleeve better resists the tensile force, the situation that the oil pipe is separated from the main body is relieved, and the connectivity of the oil pipe and the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pipe joints, and particularly to a joint structure for a stainless steel oil pipe and its usage method. Background Technique

[0002] In modern industries and transportation and other fields, the reliability of hydraulic systems and fuel delivery systems is crucial. Stainless steel oil pipes are widely used in these systems due to their excellent corrosion resistance, high temperature resistance, high strength and other properties. As a key component connecting stainless steel oil pipes, the performance of the joint structure directly affects the safety and stability of the entire system;

[0003] Generally, when connecting oil pipes through a ferrule structure, it is basically through a ferrule on the inner wall of the connecting structure. Relying on the extrusion of the ferrule by the connector and the nut on the connecting structure during connection, the ferrule is pressed into the space between the joint body and the oil pipe to form a seal. Since the oil pipe is generally made of metal and its surface is relatively smooth, when the ferrule is pressed into the space between the joint body and the oil pipe, during long-term use, when subjected to external vibrations or continuous changes in the pressure inside the oil pipe, it is easy for the ferrule to gradually shift on the surface of the oil pipe, resulting in loosening between the oil pipe and the ferrule, affecting the connectivity and sealing performance of this device. Summary of the Invention

[0004] The purpose of the present invention is to provide a joint structure for a stainless steel oil pipe and its usage method to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention is a joint structure for a stainless steel oil pipe, including a main body. The outer surface of the main body is threadedly connected with a nut, and a ferrule is slidably connected inside the nut. It also includes;

[0007] An auxiliary mechanism, the auxiliary mechanism includes a conical sleeve slidably connected to the outer surface of the nut. The inner wall of the conical sleeve is hollow, and several rubber rods are arranged on the inner wall of the conical sleeve. One side of the rubber rod close to the main body penetrates through the inner wall of the conical sleeve and extends to the inside. The extended end of the rubber rod is fixedly connected with a spring block, and the outer surface of the conical sleeve is open;

[0008] A pushing mechanism, the pushing mechanism includes several first sliding plates slidably connected inside the conical sleeve. One side of the first sliding plate close to the main body is connected with two first intermediate rods. The ends of the two first intermediate rods away from the first sliding plate are rotatably connected with an acute-angle block one. A second sliding plate is arranged between the two first sliding plates. One side of the second sliding plate close to the main body is rotatably connected with two second intermediate rods. The ends of the two second intermediate rods away from the second sliding plate are rotatably connected with an acute-angle block two.

[0009] Further, a hollow plate is fixedly connected to the bottom of the acute-angle block two. An arc-shaped rod is slidably connected between the two hollow plates. One end of the sliding plate one close to the arc-shaped rod is fixedly connected to a first fixing rod. The end of the first fixing rod away from the sliding plate one penetrates through the side wall of the arc-shaped rod and extends to the outside. A square block is fixedly connected to the extending end of the first fixing rod. A first spring rod is rotatably connected to both the left side and the right side of the square block. The end of the first spring rod away from the first fixing rod is rotatably connected inside the conical sleeve. A spring is fixedly connected between the bottom of the hollow plate and the inside of the conical sleeve.

[0010] Further, a fixing mechanism is arranged inside the main body. The fixing mechanism includes a hollow ring fixedly connected to the outer surface of the conical sleeve. A rectangular groove is formed in the side wall of the hollow ring. A plurality of elastic sleeves are fixedly connected to the outer surface of the hollow ring. A triangular plate is fixedly connected to the inner wall of the bottom of the hollow ring.

[0011] Further, a moving mechanism is arranged at the bottom of the fixing ring. The moving mechanism includes a fixing ring arranged and connected to the bottom of the hollow ring. A plurality of second spring rods are fixedly connected to the bottom of the fixing ring. The ends of the plurality of second spring rods away from the fixing ring penetrate through the inner wall of the bottom of the hollow ring and extend to the inside. A connecting plate is rotatably connected to the extending end of the second spring rod. An arc-shaped plate is rotatably connected to the end of the connecting plate away from the second spring rod.

[0012] Further, the bottom of the arc-shaped plate is in contact with the triangular plate inside the hollow ring. A second fixing rod is rotatably connected to the end of the arc-shaped plate away from the second spring rod. The end of the second fixing rod away from the arc-shaped plate penetrates through the outer wall of the bottom of the hollow ring and extends to the outside. The extending ends of the plurality of second fixing rods are fixedly connected to a pressing ring. A rubber ring is fixedly connected to the end of the pressing ring away from the second fixing rod. A telescopic plate is fixedly connected to the bottom of the rubber ring. A plurality of telescopic rods are fixedly connected to the top of the telescopic plate. The ends of the telescopic rods away from the telescopic plate penetrate through the side wall of the pressing ring and are fixedly connected to the hollow ring.

[0013] Further, a sealing mechanism is arranged inside the hollow ring. The sealing mechanism includes a plurality of spherical sleeves slidably connected inside the hollow ring. The outer surface of the spherical sleeve is in contact with the side wall of the arc-shaped plate. A flexible pipe is fixedly connected between the two spherical sleeves.

[0014] Further, the flexible pipe and the spherical sleeve are in a communicating setting. The middle part of the flexible pipe is in a communicating setting with the elastic sleeve. An arc-shaped spring plate is fixedly connected to the inside of the spherical sleeve. The outer surface of the spherical sleeve is located between the rectangular grooves.

[0015] Further, a using method of a joint structure of a stainless-steel oil pipe. For the joint structure of the stainless-steel oil pipe, the method includes the following steps.

[0016] S1: First, pass the oil pipe through the middle of the nut, and then pass the ferrule and the conical sleeve through the oil pipe and into the inside of the nut.

[0017] S2: Subsequently, connect the main body to the nut by screwing, and then connect the end of the main body away from the nut to the component to be connected, so that the oil pipe is connected to the component to be connected.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the present invention, when connecting the main body to the nut, the connection between the main body and the nut enables the bottom end of the main body to connect to the surface of the conical sleeve during connection. When the surface of the conical sleeve is squeezed, the conical sleeve will squeeze the ferrule. At this time, several rubber rods inside the conical sleeve will slide into the conical sleeve under the reaction force generated by the ferrule. When the rubber rods slide, the rubber rods will drive the spring block to squeeze the square block at the bottom of the first fixing rod. After being squeezed, the square block will drive the first fixing rod to slide. When the first fixing rod slides, it will drive the first sliding plate to move upward. When the first sliding plate moves upward, it will drive the first acute-angle block to move upward through the first intermediate rod. After that, when the first acute-angle block moves up to the opening on the surface of the conical sleeve, the continuous upward movement of the first sliding plate will push the first acute-angle block through the first intermediate rod, causing the first acute-angle block to extend out of the opening on the surface of the conical sleeve. Subsequently, after the first fixing rod moves up a certain distance, the upward-moving first fixing rod will push the arc rod upward. When the arc rod moves upward, it will push the second sliding plate upward through the hollow plate. When the second sliding plate moves upward, by the same principle as the upward movement of the first sliding plate, the second acute-angle block will also extend out of the opening of the conical sleeve and be between the two first acute-angle blocks. After that, when the first acute-angle block and the second acute-angle block extend out of the opening of the conical sleeve, the outer surfaces of the extended first acute-angle block and the second acute-angle block will squeeze the inner wall of the main body. When squeezing the inner wall of the main body, the reaction force generated by the inner wall of the main body will push the inside of the conical sleeve through the first sliding plate and the second sliding plate, making the conical sleeve in close contact with the oil pipe. At the same time, it will also increase the friction between the conical sleeve and the oil pipe, which helps to prevent the joint from loosening during use. At the same time, when the oil pipe is subjected to tensile force, it will enable the conical sleeve to better resist the tensile force, reduce the situation of the oil pipe separating from the main body, and improve the connection between the oil pipe and this device.

[0020] 2. In the present invention, when the first sliding plate and the second sliding plate slide upward, the upward movement of the first sliding plate and the second sliding plate will squeeze the bottom of the fixed ring. After the bottom of the fixed ring is squeezed, it will drive the second spring rod to rise. When the second spring rod moves upward, the second spring rod will push the arc plate to rotate through the connecting plate. When the arc plate rotates, the end of the arc plate away from the connecting plate will drive the second fixed rod to slide downward. When multiple second fixed rods slide downward synchronously, the second fixed rod will squeeze the rubber ring through the extrusion ring. After the rubber ring is squeezed, it will drive the telescopic plate to move downward through the telescopic rod on the telescopic plate. When the telescopic plate moves downward, it will be on the surfaces of the first acute-angle block and the second acute-angle block. Then, when the extrusion ring continues to move downward, the extrusion ring will squeeze the middle of the rubber ring. After the rubber ring is squeezed, it will deform. At this time, both sides of the middle part of the deformed rubber ring will bulge outward. At this time, the bulging rubber ring will contact the surfaces of the first acute-angle block and the second acute-angle block, and form a buffer layer between the first acute-angle block, the second acute-angle block and the inner wall of the main body, reducing the pressure borne by the inner wall of the main body and reducing the situation that the inner wall of the main body is damaged or scratched due to excessive extrusion force between the first acute-angle block and the second acute-angle block.

[0021] 3. In the present invention, when the second spring rod slides under the push of the fixed ring, the sliding of the second spring rod will push the arc plate to rotate through the connecting plate. When the arc plate rotates, the arc plate will push the spherical sleeve, so that the spherical sleeve extends out of the surface of the rectangular groove and contacts the inner wall of the main body. Then, when the arc plate continues to rotate, the rotation of the arc plate will squeeze the spherical sleeve. After the spherical sleeve is squeezed, it will closely adhere to the inner wall of the main body. At the same time, when the spherical sleeve is squeezed by the arc plate, the rotation of the arc plate will squeeze the spherical sleeve, causing the spherical sleeve to deform. When the spherical sleeve deforms, it will squeeze the gas inside the spherical sleeve, and the gas will enter the elastic sleeve through the flexible tube and cause it to expand. At this time, the fitting of the spherical sleeve on the inner wall of the main body and the expansion of the elastic sleeve can form a sealing layer between the conical sleeve and the inner wall of the main body, filling the tiny gap generated between the conical sleeve and the inner wall of the main body when the rubber ring deforms, making the outer wall of the conical sleeve contact the inner wall of the main body more closely, further reducing the possibility of leakage and enhancing the sealing performance of the joint.

[0022] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is Figure 3 Enlarged view of part A in

[0026] Figure 3 Schematic diagram of the partial cross-section of the main body of the present invention;

[0027] Figure 4 Schematic diagram of the partial cross-sectional structure of the auxiliary mechanism of the present invention;

[0028] Figure 5 Schematic diagram of the driving mechanism of the present invention;

[0029] Figure 6 Schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 7 Schematic diagram of the moving mechanism of the present invention;

[0031] Figure 8 Schematic diagram of the sealing mechanism of the present invention;

[0032] Figure 9 is Figure 8 Enlarged view of part B in

[0033] Figure 10 Flow chart of the usage method of the present invention.

[0034] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0035] In the figure: 1. Main body; 101. Nut; 102. Ferrule; 2. Auxiliary mechanism; 201. Tapered sleeve; 202. Rubber rod; 203. Spring block; 3. Driving mechanism; 301. Sliding plate I; 302. Intermediate rod I; 303. Acute angle block I; 304. Sliding plate II; 305. Intermediate rod II; 306. Acute angle block II; 307. Hollow plate; 308. Arc rod; 309. Fixed rod I; 310. Spring rod I; 4. Fixing mechanism; 401. Hollow ring; 402. Rectangular groove; 403. Elastic sleeve; 5. Moving mechanism; 501. Fixed ring; 502. Spring rod II; 503. Connecting plate; 504. Arc plate; 505. Fixed rod II; 506. Extrusion ring; 507. Telescopic plate; 508. Rubber ring; 6. Sealing mechanism; 601. Spherical sleeve; 602. Flexible tube; 603. Arc spring plate. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 - 9 As shown, the present invention is a joint structure for a stainless steel oil pipe, including a main body 1. A nut 101 is threadedly connected to the outer surface of the main body 1. A ferrule 102 is slidably connected inside the nut 101. It also includes;

[0038] An auxiliary mechanism 2, which includes a tapered sleeve 201 slidably connected to the outer surface of the nut 101. The inner wall of the tapered sleeve 201 is hollow. A plurality of rubber rods 202 are arranged on the inner wall of the tapered sleeve 201. One side of the rubber rod 202 close to the main body 1 penetrates through the inner wall of the tapered sleeve 201 and extends to the inside. The extended end of the rubber rod 202 is fixedly connected with a spring block 203. The outer surface of the tapered sleeve 201 is open;

[0039] A pushing mechanism 3, which includes a plurality of first sliding plates 301 slidably connected inside the tapered sleeve 201. Two first intermediate rods 302 are connected to one side of the first sliding plate 301 close to the main body 1. The ends of the two first intermediate rods 302 away from the first sliding plate 301 are rotatably connected with a first acute-angle block 303. A second sliding plate 304 is arranged between the two first sliding plates 301. Two second intermediate rods 305 are rotatably connected to one side of the second sliding plate 304 close to the main body 1. The ends of the two second intermediate rods 305 away from the second sliding plate 304 are rotatably connected with a second acute-angle block 306. First, pass the oil pipe through the middle of the nut 101, then pass the ferrule 102 and the tapered sleeve 201 through the oil pipe and into the inside of the nut 101. Then, connect the main body 1 to the nut 101 by screwing. Then, connect the end of the main body 1 away from the nut 101 to the component to be connected, so that the oil pipe is connected to the component to be connected.

[0040] A hollow plate 307 is fixedly connected to the bottom of the acute-angle block two 306. An arc-shaped rod 308 is slidably connected between the two hollow plates 307. One end of the sliding plate one 301 close to the arc-shaped rod 308 is fixedly connected to a fixing rod one 309. The end of the fixing rod one 309 away from the sliding plate one 301 penetrates through the side wall of the arc-shaped rod 308 and extends to the outside. A square block is fixedly connected to the extended end of the fixing rod one 309. A first spring rod 310 is rotatably connected to both the left and right sides of the square block. The end of the first spring rod 310 away from the fixing rod one 309 is rotatably connected inside the conical sleeve 201. A spring is fixedly connected between the bottom of the hollow plate 307 and the inside of the conical sleeve 201. After the square block is squeezed, it will drive the fixing rod one 309 to slide. When the fixing rod one 309 slides, it will drive the sliding plate one 301 to move upward. When the sliding plate one 301 moves upward, it will drive the acute-angle block one 303 to move upward through the intermediate rod one 302. After that, when the acute-angle block one 303 moves upward to the opening on the surface of the conical sleeve 201, the continuous upward movement of the sliding plate one 301 will push the acute-angle block one 303 through the intermediate rod one 302, so that the acute-angle block one 303 extends out of the opening on the surface of the conical sleeve 201.

[0041] A fixing mechanism 4 is arranged inside the main body 1. The fixing mechanism 4 includes a hollow ring 401 fixedly connected to the outer surface of the conical sleeve 201. A rectangular groove 402 is formed in the side wall of the hollow ring 401. A plurality of elastic sleeves 403 are fixedly connected to the outer surface of the hollow ring 401. A triangular plate is fixedly connected to the inner wall of the bottom of the hollow ring 401. When the arc-shaped plate 504 rotates, the arc-shaped plate 504 will push the spherical sleeve 601, so that the spherical sleeve 601 extends out of the surface of the rectangular groove 402.

[0042] A moving mechanism 5 is arranged at the bottom of the fixing ring 501. The moving mechanism 5 includes a fixing ring 501 arranged and connected to the bottom of the hollow ring 401. A plurality of second spring rods 502 are fixedly connected to the bottom of the fixing ring 501. The ends of the plurality of second spring rods 502 away from the fixing ring 501 penetrate through the inner wall of the bottom of the hollow ring 401 and extend to the inside. The extended end of the second spring rod 502 is rotatably connected to a connecting plate 503. The end of the connecting plate 503 away from the second spring rod 502 is rotatably connected to an arc-shaped plate 504. When the bottom of the fixing ring 501 is squeezed, it will drive the second spring rod 502 to rise. When the second spring rod 502 moves upward, the second spring rod 502 will push the arc-shaped plate 504 to rotate through the connecting plate 503. When the arc-shaped plate 504 rotates, the end of the arc-shaped plate 504 away from the connecting plate 503 will drive the fixing rod two 505 to slide downward.

[0043] The bottom of the arc-shaped plate 504 is in contact with the triangular plate inside the hollow ring 401. One end of the arc-shaped plate 504 away from the second spring rod 502 is rotatably connected to the second fixed rod 505. The end of the second fixed rod 505 away from the arc-shaped plate 504 penetrates through the bottom outer wall of the hollow ring 401 and extends to the outside. The extended ends of several second fixed rods 505 are fixedly connected to an extrusion ring 506. One end of the extrusion ring 506 away from the second fixed rod 505 is fixedly connected to a rubber ring 508. The bottom of the rubber ring 508 is fixedly connected to a telescopic plate 507. The top of the telescopic plate 507 is fixedly connected to several telescopic rods. The ends of the telescopic rods away from the telescopic plate 507 penetrate through the side wall of the extrusion ring 506 and are fixedly connected to the hollow ring 401. When multiple second fixed rods 505 slide downward synchronously, the second fixed rods 505 will extrude the rubber ring 508 through the extrusion ring 506. After the rubber ring 508 is extruded, it will drive the telescopic plate 507 to move downward through the telescopic rods on the telescopic plate 507. When the telescopic plate 507 moves downward, it will be on the surfaces of the first acute-angle block 303 and the second acute-angle block 306. Then, when the extrusion ring 506 continues to move downward, the extrusion ring 506 will extrude the middle of the rubber ring 508, and the rubber ring 508 will deform after being extruded.

[0044] A sealing mechanism 6 is arranged inside the hollow ring 401. The sealing mechanism 6 includes several spherical sleeves 601 slidably connected inside the hollow ring 401. The outer surface of the spherical sleeve 601 is in contact with the side wall of the arc-shaped plate 504. A flexible pipe 602 is fixedly connected between two spherical sleeves 601.

[0045] The flexible pipe 602 and the spherical sleeve 601 are arranged in a communicating way. The middle of the flexible pipe 602 is in communication with the elastic sleeve 403. An arc-shaped spring plate 603 is fixedly connected inside the spherical sleeve 601. The outer surface of the spherical sleeve 601 is located between the rectangular grooves 402. When the second spring rod 502 slides under the push of the fixed ring 501, the sliding of the second spring rod 502 will push the arc-shaped plate 504 through the connecting plate 503 to make it rotate. When the arc-shaped plate 504 rotates, the arc-shaped plate 504 will push the spherical sleeve 601, so that the spherical sleeve 601 extends out of the surface of the rectangular groove 402 and contacts the inner wall of the main body 1. Then, when the arc-shaped plate 504 continues to rotate, the rotation of the arc-shaped plate 504 will extrude the spherical sleeve 601. After the spherical sleeve 601 is extruded, it will closely adhere to the inner wall of the main body 1. At the same time, when the spherical sleeve 601 is extruded by the arc-shaped plate 504, the rotation of the arc-shaped plate 504 will extrude the spherical sleeve 601.

[0046] A usage method of a joint structure of a stainless-steel oil pipe, the joint structure of the stainless-steel oil pipe, this method includes the following steps.

[0047] S1: First, pass the oil pipe through the middle of the nut 101, and then pass the ferrule 102 and the tapered sleeve 201 through the oil pipe and into the nut 101.

[0048] S2: Then, connect the main body 1 to the nut 101 by screwing. After that, connect the end of the main body 1 far from the nut 101 to the component to be connected, so that the oil pipe is connected to the component to be connected.

[0049] During use, first pass the oil pipe through the middle of the nut 101. Then, pass the ferrule 102 and the tapered sleeve 201 through the oil pipe and into the inside of the nut 101. Then, connect the main body 1 to the nut 101 by screwing. After that, connect the end of the main body 1 far from the nut 101 to the component to be connected, so that the oil pipe is connected to the component to be connected.

[0050] When connecting the main body 1 to the nut 101, the connection between the main body 1 and the nut 101 can make the bottom end of the main body 1 connect to the surface of the tapered sleeve 201 during connection. When the surface of the tapered sleeve 201 is squeezed, the tapered sleeve 201 will squeeze the ferrule 102. At this time, several rubber rods 202 inside the tapered sleeve 201 will slide into the inside of the tapered sleeve 201 under the reaction force generated by the ferrule 102. When the rubber rods 202 slide, the rubber rods 202 will drive the spring block 203 to squeeze the square block at the bottom of the fixing rod 309. After being squeezed, the square block will drive the fixing rod 309 to slide. When the fixing rod 309 slides, it will drive the sliding plate 301 to move upward. When the sliding plate 301 moves upward, it will drive the acute angle block 303 to move upward through the middle rod 302. After that, when the acute angle block 303 moves upward to the opening on the surface of the tapered sleeve 201, the continuous upward movement of the sliding plate 301 will push the acute angle block 303 through the middle rod 302, so that the acute angle block 303 extends out of the opening on the surface of the tapered sleeve 201. Subsequently, after the fixing rod 309 moves upward for a certain distance, the upward moving fixing rod 309 will push the arc rod 308 upward. When the arc rod 308 moves upward, it will push the sliding plate 304 upward through the hollow plate 307. When the sliding plate 304 moves upward, in the same principle as the rising of the sliding plate 301, the acute angle block 306 will also extend out of the opening of the tapered sleeve 201 and be between the two acute angle blocks 303. After that, when the acute angle block 303 and the acute angle block 306 extend out of the opening of the tapered sleeve 201, the outer surfaces of the extended parts of the acute angle block 303 and the acute angle block 306 will squeeze the inner wall of the main body 1. When squeezing the inner wall of the main body 1, the reaction force generated by the inner wall of the main body 1 will push into the inside of the tapered sleeve 201 through the sliding plate 301 and the sliding plate 304, so that the tapered sleeve 201 is in close contact with the oil pipe. At the same time, it will also increase the friction force between the tapered sleeve 201 and the oil pipe, which helps to prevent the joint from loosening during use. At the same time, when the oil pipe is subjected to tensile force, it will make the tapered sleeve 201 better resist the tensile force, reduce the situation of the oil pipe separating from the main body 1, and improve the connection between the oil pipe and this device.

[0051] When the first sliding plate 301 and the second sliding plate 304 slide upward, the upward movement of the first sliding plate 301 and the second sliding plate 304 will squeeze the bottom of the fixed ring 501. After the bottom of the fixed ring 501 is squeezed, it will drive the second spring rod 502 to rise. When the second spring rod 502 moves upward, the second spring rod 502 will push the arc-shaped plate 504 to rotate through the connecting plate 503. When the arc-shaped plate 504 rotates, the end of the arc-shaped plate 504 away from the connecting plate 503 will drive the second fixed rod 505 to slide downward. When multiple second fixed rods 505 slide downward synchronously, the second fixed rod 505 will squeeze the rubber ring 508 through the extrusion ring 506. After the rubber ring 508 is squeezed, it will drive the telescopic plate 507 to move downward through the telescopic rod on the telescopic plate 507. When the telescopic plate 507 moves downward, it will be on the surfaces of the first acute-angle block 303 and the second acute-angle block 306. Then, when the extrusion ring 506 continues to move downward, the extrusion ring 506 will squeeze the middle of the rubber ring 508. After the rubber ring 508 is squeezed, it will deform. At this time, both sides of the middle part of the deformed rubber ring 508 will bulge outward. At this time, the bulging rubber ring 508 will contact the surfaces of the first acute-angle block 303 and the second acute-angle block 306, and form a buffer layer between the first acute-angle block 303 and the second acute-angle block 306 and the inner wall of the main body 1, reducing the pressure borne by the inner wall of the main body 1 and reducing the situation that the inner wall of the main body 1 is damaged or scratched due to excessive extrusion force between the first acute-angle block 303 and the second acute-angle block 306.

[0052] When the second spring rod 502 slides under the push of the fixed ring 501, the sliding of the second spring rod 502 will push the arc-shaped plate 504 to rotate through the connecting plate 503. When the arc-shaped plate 504 rotates, the arc-shaped plate 504 will push the spherical sleeve 601, so that the spherical sleeve 601 extends out of the surface of the rectangular groove 402 and contacts the inner wall of the main body 1. Then, when the arc-shaped plate 504 continues to rotate, the rotation of the arc-shaped plate 504 will squeeze the spherical sleeve 601. After the spherical sleeve 601 is squeezed, it will closely adhere to the inner wall of the main body 1. At the same time, when the spherical sleeve 601 is squeezed by the arc-shaped plate 504, the rotation of the arc-shaped plate 504 will squeeze the spherical sleeve 601, causing the spherical sleeve 601 to deform. When the spherical sleeve 601 deforms, it will squeeze the gas inside the spherical sleeve 601. After the gas is squeezed, it will enter the elastic sleeve 403 through the flexible pipe 602 and cause it to expand. At this time, the fitting of the spherical sleeve 601 on the inner wall of the main body 1 and the expansion of the elastic sleeve 403 can form a sealing layer between the conical sleeve 201 and the inner wall of the main body 1, filling the tiny gap generated between the conical sleeve 201 and the inner wall of the main body 1 when the rubber ring 508 deforms, making the outer wall of the conical sleeve 201 contact the inner wall of the main body 1 more closely, further reducing the possibility of leakage and enhancing the sealing performance of the joint.

[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A joint structure of a stainless steel oil pipe, comprising a main body (1), wherein a nut (101) is threadedly connected to the outer surface of the main body (1), and a ferrule (102) is slidably connected inside the nut (101), characterized in that, Further included are; An auxiliary mechanism (2), the auxiliary mechanism (2) includes a conical sleeve (201) slidably connected to the outer surface of the nut (101). The inner wall of the conical sleeve (201) is hollow, and several rubber rods (202) are arranged on the inner wall of the conical sleeve (201). One side of the rubber rod (202) close to the main body (1) penetrates through the inner wall of the conical sleeve (201) and extends to the inside. The extended end of the rubber rod (202) is fixedly connected with a spring block (203). The outer surface of the conical sleeve (201) is open; A pushing mechanism (3), the pushing mechanism (3) includes several first sliding plates (301) slidably connected inside the conical sleeve (201). Two first intermediate rods (302) are integrally connected to one side of the first sliding plate (301) close to the main body (1). The ends of the two first intermediate rods (302) far from the first sliding plate (301) are rotatably connected with a first acute-angle block (303). A second sliding plate (304) is arranged between the two first sliding plates (301). Two second intermediate rods (305) are rotatably connected to one side of the second sliding plate (304) close to the main body (1). The ends of the two second intermediate rods (305) far from the second sliding plate (304) are rotatably connected with a second acute-angle block (306).

2. The joint structure of a stainless steel oil pipe according to claim 1, characterized in that: The bottom of the second acute-angle block (306) is fixedly connected with a hollow plate (307). An arc-shaped rod (308) is slidably connected between the two hollow plates (307). One end of the first sliding plate (301) close to the arc-shaped rod (308) is fixedly connected with a first fixed rod (309). The end of the first fixed rod (309) far from the first sliding plate (301) penetrates through the side wall of the arc-shaped rod (308) and extends to the outside. The extended end of the first fixed rod (309) is fixedly connected with a square block. A first spring rod (310) is rotatably connected to both the left side and the right side of the square block. The end of the first spring rod (310) far from the first fixed rod (309) is rotatably connected inside the conical sleeve (201). A spring is fixedly connected between the bottom of the hollow plate (307) and the inside of the conical sleeve (201).

3. The joint structure of a stainless steel oil pipe according to claim 2, characterized in that: A fixing mechanism (4) is arranged inside the main body (1). The fixing mechanism (4) includes a hollow ring (401) fixedly connected to the outer surface of the conical sleeve (201). A rectangular groove (402) is opened on the side wall of the hollow ring (401). Several elastic sleeves (403) are fixedly connected to the outer surface of the hollow ring (401). A triangular plate is fixedly connected to the inner wall of the bottom of the hollow ring (401).

4. The joint structure of a stainless steel oil pipe according to claim 3, characterized in that: A moving mechanism (5) is provided at the bottom of the fixed ring (501). The moving mechanism (5) includes a fixed ring (501) connected to the bottom of the hollow ring (401). A plurality of second spring rods (502) are fixedly connected to the bottom of the fixed ring (501). One end of each of the plurality of second spring rods (502) away from the fixed ring (501) penetrates through the inner wall of the bottom of the hollow ring (401) and extends into the interior. The extended end of the second spring rod (502) is rotatably connected to a connecting plate (503). One end of the connecting plate (503) away from the second spring rod (502) is rotatably connected to an arc-shaped plate (504).

5. The joint structure of a stainless steel oil pipe according to claim 4, characterized in that: The bottom of the arc-shaped plate (504) is in contact with the triangular plate inside the hollow ring (401). One end of the arc-shaped plate (504) away from the second spring rod (502) is rotatably connected to a second fixed rod (505). One end of the second fixed rod (505) away from the arc-shaped plate (504) penetrates through the outer wall of the bottom of the hollow ring (401) and extends to the outside. The extended ends of the plurality of second fixed rods (505) are fixedly connected to a pressing ring (506). One end of the pressing ring (506) away from the second fixed rod (505) is fixedly connected to a rubber ring (508). The bottom of the rubber ring (508) is fixedly connected to a telescopic plate (507). The top of the telescopic plate (507) is fixedly connected to a plurality of telescopic rods. One end of each telescopic rod away from the telescopic plate (507) penetrates through the side wall of the pressing ring (506) and is fixedly connected to the hollow ring (401).

6. The joint structure of a stainless steel oil pipe according to claim 5, characterized in that: A sealing mechanism (6) is provided inside the hollow ring (401). The sealing mechanism (6) includes a plurality of spherical sleeves (601) slidably connected inside the hollow ring (401). The outer surface of the spherical sleeve (601) is in contact with the side wall of the arc-shaped plate (504). A flexible tube (602) is fixedly connected between two spherical sleeves (601).

7. The joint structure of a stainless steel oil pipe according to claim 6, characterized in that: The flexible tube (602) is in communication with the spherical sleeve (601). The middle of the flexible tube (602) is in communication with the elastic sleeve (403). An arc-shaped spring plate (603) is fixedly connected inside the spherical sleeve (601). The outer surface of the spherical sleeve (601) is located between the rectangular grooves (402).

8. A method of using a joint structure of a stainless steel oil pipe, characterized in that: Adopt the joint structure of the stainless steel oil pipe as described in claim 7. The method includes the following steps S1: First, pass the oil pipe through the middle of the nut (101), and then pass the ferrule (102) and the tapered sleeve (201) through the oil pipe into the interior of the nut (101). S2: Then, subsequently connect the main body (1) to the nut (101) by screwing. Then connect the end of the main body (1) away from the nut (101) to the component to be connected, so that the oil pipe is in communication with the connected component.

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