A connection structure for high-pressure pipe fittings and a connection method thereof

Abstract

The present invention relates to the technical field of high-pressure pipe fittings, specifically a connection structure for connecting high-pressure pipe fittings, including a first connection structure and a second connection structure; the first connection structure includes a main connection disk, a rotating disk, a connection pipe, an extension rod and a threaded collar, an external thread structure is provided on the surface of the other end of the connection pipe, and a plurality of through grooves are transversely provided at one end of the connection pipe with an external threaded hole structure, the first connection structure includes a main connection disk and a second connection structure including a first connection disk and a second connection disk respectively provided on the main connection disk, a plurality of threaded rods are provided on the inner side of the first connection disk, a plurality of through holes are provided on the second connection disk, and the threaded rods penetrate the through holes and are fixed by nuts. The present invention can replace the traditional welding connection method to connect two high-pressure pipes, and can realize the connection of the two high-pressure pipes without having certain welding technical requirements, and will not cause damage to the pipes when the two high-pressure pipes are disassembled.

Description

Technical Field

[0001] The invention relates to a flange, in particular to a connection structure and a connection method for high-pressure pipe fittings, belonging to the technical field of high-pressure pipe fittings. Background Art

[0002] High-pressure pipe is a kind of pipe that can withstand pressure and is used to transport liquids. There are many types of pipes, including pipe fittings, copper pipes, stainless pipe fittings, and others. It is mainly used to manufacture high-quality carbon structural steel and alloy structural steel high-pressure pipes for steam boiler pipes with high pressure or above.

[0003] Among them, high-pressure pipe fittings are high-quality carbon steel, alloy structural steel and stainless steel seamless pipe fittings used to manufacture high-pressure containers and pipelines. High-pressure pipe fittings have good room temperature and high temperature comprehensive mechanical properties, strict quality control, and are suitable for various working occasions under high pressure conditions; high-pressure pipe fittings are mainly used in boilers, diesel engine high-pressure oil pipes, fertilizer equipment and pipelines, etc.;

[0004] At present, welding is mostly used to connect multiple high-pressure pipe fittings. Although welding can improve the airtightness of the connection between two high-pressure pipelines, it requires certain technical requirements to weld the pipelines, and when the two pipelines need to be separated and disassembled, they need to be cut to separate them, which can easily cause damage to the pipelines.

[0005] Therefore, it is urgent to improve the connection method of high-pressure pipe fittings to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a connection structure and a connection method for high-pressure pipe fittings, which can replace the traditional welding connection method to connect two high-pressure pipelines. The connection of the two high-pressure pipelines can be achieved without having to meet certain welding technical requirements. At the same time, the pipelines will not be damaged when the two high-pressure pipelines are disassembled.

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] A connection structure for connecting high-pressure pipe fittings, comprising a first connection structure and a second connection structure, wherein the first connection structure is identical to the second connection structure;

[0009] The first connection structure includes a main connection disk, a rotating disk, a connecting pipe, an extension rod and a threaded collar, the rotating disk is rotatably connected to the main connection disk, one end of the connecting pipe is fixedly connected to the main connection disk, an external thread structure is provided on the surface of the other end of the connecting pipe, a plurality of through grooves are transversely provided on one end of the connecting pipe provided with the external thread structure, the threaded collar is screwed and connected to the external thread structure, and the extension rod is arranged between the rotating disk and the threaded collar;

[0010] The main connecting plate included in the first connecting structure and the main connecting plate included in the second connecting structure are respectively provided with a first connecting plate and a second connecting plate, the inner side of the first connecting plate is provided with a plurality of threaded rods, the second connecting plate is opened with a plurality of through holes, the threaded rods penetrate the through holes and are fixed by nuts.

[0011] Preferably, a circular groove is provided on one side of the main connecting disk close to the rotating disk, an annular groove is provided on the inner surface of the circular groove, the rotating disk is clamped inside the circular groove, and an annular slider engaged with the annular groove is provided on the inner ring of the rotating disk.

[0012] Preferably, a plurality of micro grooves are provided on the surface of the threaded collar, an internal thread structure matching the external thread structure is provided on the inner wall of the threaded collar, one end of the extension rod is fixedly connected to the rotating disk, and the other end of the extension rod is fixedly connected to the threaded collar.

[0013] Preferably, the extension rod includes a main support rod and a telescopic rod, a sliding groove is provided at one end of the main support rod away from the rotating disk, the telescopic rod slides inside the sliding groove, a second sliding groove is provided above and below the sliding groove, the second sliding groove is communicated with the sliding groove, both ends of the second sliding groove do not exceed the two ends of the sliding groove, and a second sliding block slidably connected to the second sliding groove is provided at one end of the telescopic rod close to the sliding groove.

[0014] Preferably, a second external thread structure is provided on the surface of the main support rod, and a second threaded ring is also screwed and connected on the surface of the main support rod, and the inner wall of the second threaded ring is provided with a second internal thread structure that is compatible with the second external thread structure, and the second threaded ring is located behind the second slider.

[0015] Preferably, a pressure relief valve is provided above the surface of the connecting pipe, and the pressure relief valve includes a pressure relief pipe and a closing body. The pressure relief pipe is communicated with the connecting pipe, and the closing body is clamped inside the pressure relief pipe. A chuck is provided at the bottom of the closure body that passes through the pressure relief pipe, and the diameter of the chuck is larger than the aperture of the pressure relief pipe.

[0016] Preferably, a connector is further provided on the upper end surface of the closure body, first threaded holes are provided on both sides of the surface of the connector, second threaded holes are provided on both sides of the upper end surface of the pressure relief pipe, and the first threaded hole and the second threaded hole are connected through a second threaded rod.

[0017] Preferably, the upper end surface of the pressure relief pipe is recessed inwardly to form a step body, the diameter of the step body is larger than the hole diameter at the center of the pressure relief pipe, the outer ring above the closing body is provided with a rubber sealing gasket engaged with the step body, and the lower surface of the step body is provided with a pressure relief hole, which vertically penetrates the pressure relief pipe downward and communicates with the interior of the connecting pipe.

[0018] Preferably, the inner side surfaces of the first connecting disk and the second connecting disk are both provided with rubber sealing rings, and the inner wall of the connecting pipe is attached with a rubber sealing layer.

[0019] A connection method for a connection structure for high-pressure pipe fittings, comprising the following steps:

[0020] S1: High-pressure pipeline connection: When two high-pressure pipelines need to be connected, one end of the high-pressure pipeline is inserted into the interior of the connecting pipeline and squeezed inward with force, so that the connecting pipeline with the through-groove structure portion is slightly propped up, and then the threaded collar is forcefully rotated in the direction of the through-groove, and the propped-up connecting pipeline is contracted and squeezed by utilizing the screw connection of the internal thread structure and the external thread structure, so that the high-pressure pipeline is fixed inside the connecting pipeline. During the rotation of the threaded collar, one end of the extension rod is driven to extend, and the other end is rotated accordingly through the connection with the rotating disk. When the threaded collar is rotated and the high-pressure pipeline is fixed, the telescopic rod slides and extends to a certain distance in the sliding groove, and then the second threaded collar is rotated by utilizing the screw connection of the second external thread structure and the second internal thread structure, so that the second threaded collar is rotated on the surface of the main support rod toward the telescopic rod until it abuts against the second slider. The two pipelines are connected to the first connecting structure and the second connecting structure in the same manner.

[0021] S2: Combined connection: After the two high-pressure pipelines are respectively connected to the first connecting structure and the second connecting structure, the first connecting structure and the second connecting structure need to be connected again. When connecting, the first connecting structure and the second connecting structure are brought close to each other and fitted together. At this time, a number of threaded rods are inserted into a number of through holes, and then a number of nuts are used to screw, connect and fix the threaded rods, thereby realizing the connection and fixation of the two high-pressure pipelines.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. By using the first connection structure and the second connection structure, the two high-pressure pipelines can be connected instead of the traditional welding connection method. The connection of the two high-pressure pipelines can be achieved without having to meet certain welding technical requirements. At the same time, the pipelines will not be damaged when the two high-pressure pipelines are disassembled. At the same time, by using the setting of the pressure relief valve, a good pressure relief effect can be achieved when the pressure inside the pipeline is too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the explosion three-dimensional structure of the present invention;

[0027] Figure 3 It is a connection schematic diagram of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressure relief valve of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the pressure relief pipe of the present invention;

[0030] Figure 6 It is a partial cross-sectional schematic diagram of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified image;

[0032] Figure 8 It is a cross-sectional view of the extension rod of the present invention.

[0033] In the figure, 1-first connecting structure, 2-second connecting structure, 3-main connecting plate, 4-rotating plate, 5-connecting pipe, 6-extension rod, 7-threaded collar, 8-external thread structure, 9-through groove, 10-first connecting plate, 11-second connecting plate, 12-threaded rod, 13-through hole, 14-nut, 15-circular groove, 16-annular groove, 17-annular slider, 18-micro groove, 19-internal thread structure, 20-main support rod, 21-telescopic rod , 22-sliding groove, 23-second sliding groove, 24-second sliding block, 25-second external thread structure, 26-second threaded collar, 27-second internal thread structure, 28-pressure relief valve, 29-pressure relief pipe, 30-closing body, 31-chuck, 32-connecting body, 33-first threaded hole, 34-second threaded hole, 35-second threaded rod, 36-step body, 37-rubber sealing pad, 38-pressure relief hole, 39-rubber sealing ring, 40-rubber sealing layer. DETAILED DESCRIPTION

[0034] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0035] like Figure 1-Figure 8 As shown, the connection structure for high-pressure pipe fitting connection provided in this embodiment includes a first connection structure 1 and a second connection structure 2, and the first connection structure 1 has the same structure as the second connection structure 2; the first connection structure 1 includes a main connection disk 3, a rotating disk 4, a connecting pipe 5, an extension rod 6 and a threaded collar 7, the rotating disk 4 is rotatably connected to the main connection disk 3, a circular groove 15 is provided on one side of the main connection disk 3 close to the rotating disk 4, an annular groove 16 is provided on the surface inside the circular groove 15, the rotating disk 4 is clamped inside the circular groove 15, and an annular slider 17 engaged with the annular groove 16 is provided on the inner ring of the rotating disk 4, and the rotation effect of the rotating disk 4 in the circular groove 15 can be achieved by utilizing the setting of the sliding connection between the annular groove 16 and the annular slider 17;

[0036] One end of the connecting pipe 5 is fixedly connected to the main connecting disk 3, and the surface of the other end of the connecting pipe 5 is provided with an external thread structure 8, and one end of the connecting pipe 5 provided with the external thread structure 8 is transversely provided with a plurality of through grooves 9, and the threaded collar 7 is screwed and connected with the external thread structure 8, and the extension rod 6 is arranged between the rotating disk 4 and the threaded collar 7; the surface of the threaded collar 7 is provided with a plurality of micro grooves 18, and the arrangement of the micro grooves 18 facilitates the rotation of the threaded collar 7, and the inner wall of the threaded collar 7 is provided with an internal thread structure 19 adapted to the external thread structure 8, and the arrangement of the external thread structure 8 and the internal thread structure 19 is utilized to realize the screwing and connection of the threaded collar 7 with the external thread structure 8, and one end of the extension rod 6 is fixedly connected with the rotating disk 4, and the other end of the extension rod 6 is fixedly connected with the threaded collar 7;

[0037] The extension rod 6 includes a main support rod 20 and a telescopic rod 21. A sliding groove 22 is provided at one end of the main support rod 20 away from the rotating disk 4. The telescopic rod 21 slides inside the sliding groove 22. Second sliding grooves 23 are provided above and below the sliding groove 22. The second sliding groove 23 is communicated with the sliding groove 22. Both ends of the second sliding groove 23 do not exceed the two ends of the sliding groove 22. A second sliding block 24 slidably connected to the second sliding groove 23 is provided at one end of the telescopic rod 21 close to the sliding groove 22. Both ends of the second sliding groove 23 do not exceed the two ends of the sliding groove 22. The setting of both ends of the second sliding groove 23 can prevent the telescopic rod 21 from falling off from the main support rod 20 when telescoping in the sliding groove 22; a second external thread structure 25 is provided on the surface of the main support rod 20, and a second threaded collar 26 is also screwed and connected on the surface of the main support rod 20. The inner wall of the second threaded collar 26 is provided with a second threaded collar 26 connected to the first The second internal thread structure 27 matched with the second external thread structure 25, the second threaded collar 26 is located behind the second slider 24, and during the rotation of the threaded collar 7, one end of the extension rod 6 will be driven to extend, and the other end will rotate accordingly through the connection with the rotating disk 4. When the threaded collar 7 is rotated and the high-pressure pipeline is fixed, the telescopic rod 21 will slide and extend to a certain distance in the sliding groove 22, and then by rotating the second threaded collar 26, the second external thread structure 25 and the second internal thread structure 27 are screwed and connected, so that the second threaded collar 26 is rotated on the surface of the main support rod 20 toward the telescopic rod 21 until it abuts against the second slider 24, and the telescopic rod 21 is abutted, thereby preventing the threaded collar 7 connected by the telescopic rod 21 from rotating after long-term use, and further improving the fixing effect of the pipeline connection;

[0038] The main connecting plate 3 included in the first connecting structure 1 and the main connecting plate 3 included in the second connecting structure 2 are respectively provided with a first connecting plate 10 and a second connecting plate 11, the inner side of the first connecting plate 10 is provided with a plurality of threaded rods 12, and the second connecting plate 11 is provided with a plurality of through holes 13, the threaded rods 12 penetrate through the through holes 13 and are fixed by nuts 14; when the two high-pressure pipelines are respectively connected to the first connecting structure 1 and the second connecting structure 2, it is necessary to connect the first connecting structure 1 and the second connecting structure 2, and when connecting, the first connecting structure 1 and the second connecting structure 2 are brought close to each other, at this time, the plurality of threaded rods 12 are inserted into the plurality of through holes, and then the plurality of nuts 14 are used to screw, connect and fix the plurality of threaded rods 12, thereby realizing the connection and fixation of the two high-pressure pipelines.

[0039] In this embodiment, if Figures 4 to 7As shown, a pressure relief valve 28 is arranged above the surface of the connecting pipe 5, and the pressure relief valve 28 includes a pressure relief pipe 29 and a closing body 30. The pressure relief pipe 29 is communicated with the connecting pipe 5, and the closing body 30 is clamped inside the pressure relief pipe 29. A chuck 31 is arranged at the bottom of the closing body 30 that passes through the pressure relief pipe 29. The diameter of the chuck 31 is larger than the aperture of the pressure relief pipe 29. The chuck 31 with a diameter larger than the aperture of the pressure relief pipe 29 can prevent the closing body 30 from bouncing out of the pressure relief pipe 29 when the pressure relief valve 28 is relieving pressure; a connecting body 32 is also arranged on the upper end surface of the closing body 30, and first threaded holes 33 are opened on both sides of the surface of the connecting body 32, and second threaded holes 34 are opened on both sides of the upper end surface of the pressure relief pipe 29. The first threaded hole 33 and the second threaded hole 34 are connected by a second threaded rod 35, and the second threaded rod 35 connects the first threaded hole 33 The setting of penetrating connection with the second threaded hole 34 can further fix the closing body 30 inside the pressure relief pipe 29; the upper end surface of the pressure relief pipe 29 is recessed inwardly and provided with a step body 36, the diameter of the step body 36 is larger than the aperture of the center of the pressure relief pipe 29, and the outer ring above the closing body 30 is provided with a rubber sealing pad 37 engaged with the step body 36, and the lower surface of the step body 36 is provided with a pressure relief hole 38, the pressure relief hole 38 vertically penetrates the pressure relief pipe 29 downward and communicates with the interior of the connecting pipe 5. When the pipeline needs to be depressurized, the second threaded rod 35 is rotated to make the second threaded rod 35 move upward in the second threaded hole 34, so that the rubber sealing pad 37 tightly engaged with the step body 36 is separated from the step body 36, and then the pressure relief hole 38 is exposed to the outside, so that the pressure inside the pipeline can be released, thereby achieving the effect of pressure relief.

[0040] In this embodiment, if Figure 1 and Figure 3 As shown, the inner side surfaces of the first connecting disk 10 and the second connecting disk 11 are both provided with rubber sealing rings 39, and the inner wall of the connecting pipe 5 is attached with a rubber sealing layer 40. The provision of the rubber sealing ring 39 and the rubber sealing layer 40 can improve the sealing effect after the first connecting structure 1 and the second connecting structure 2 are connected.

[0041] A connection method for a connection structure for high-pressure pipe fittings, comprising the following steps:

[0042] S1: High-pressure pipeline connection: When two high-pressure pipelines need to be connected, one end of the high-pressure pipeline is inserted into the connecting pipeline 5 and squeezed inward with force, so that the connecting pipeline 5 with the through groove 9 structure part is slightly propped up, and then the threaded collar 7 is rotated in the direction of the through groove 9 with force, and the propped-up connecting pipeline 5 is contracted and squeezed by the screw connection of the internal thread structure 19 and the external thread structure 8, so that the high-pressure pipeline is fixed inside the connecting pipeline 5. During the rotation of the threaded collar 7, one end of the extension rod 6 is driven to extend, and the other end is rotated accordingly through the connection with the rotating disk 4. When the threaded collar 7 is rotated and the high-pressure pipeline is fixed, the telescopic rod 21 slides and extends to a certain distance in the sliding groove 22, and then the second threaded collar 26 is rotated, and the second external thread structure 25 and the second internal thread structure 27 are screwed and connected, so that the second threaded collar 26 is rotated on the surface of the main support rod 20 toward the telescopic rod 21 until it abuts against the second slider 24. The two pipelines are connected in the same way as the first connecting structure 1 and the second connecting structure 2.

[0043] S2: Combined connection: After the two high-pressure pipelines are respectively connected to the first connecting structure 1 and the second connecting structure 2, the first connecting structure 1 and the second connecting structure 2 need to be connected again. When connecting, the first connecting structure 1 and the second connecting structure 2 are brought close to each other and fitted. At this time, a number of threaded rods 12 are inserted into a number of through holes, and then a number of nuts 14 are used to screw, connect and fix the number of threaded rods 12, thereby realizing the connection and fixation of the two high-pressure pipelines.

[0044] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0045] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0046] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A connection structure for connecting high-pressure pipe fittings, comprising a first connection structure (1) and a second connection structure (2), characterized in that: The first connection structure (1) and the second connection structure (2) have the same structure; The first connection structure (1) comprises a main connection disk (3), a rotating disk (4), a connection pipe (5), an extension rod (6) and a threaded collar (7); the rotating disk (4) is rotatably connected to the main connection disk (3); one end of the connection pipe (5) is fixedly connected to the main connection disk (3); an external thread structure (8) is provided on the surface of the other end of the connection pipe (5); one end of the connection pipe (5) provided with the external thread structure (8) is transversely provided with a plurality of through grooves (9); the threaded collar (7) is screwed and connected to the external thread structure (8); and the extension rod (6) is arranged between the rotating disk (4) and the threaded collar (7); The main connection plate (3) included in the first connection structure (1) and the main connection plate (3) included in the second connection structure (2) are respectively provided with a first connection plate (10) and a second connection plate (11); the inner side surface of the first connection plate (10) is provided with a plurality of threaded rods (12); the second connection plate (11) is provided with a plurality of through holes (13); the threaded rods (12) penetrate through the through holes (13) and are fixed by nuts (14); The extension rod (6) comprises a main support rod (20) and a telescopic rod (21); a sliding groove (22) is provided at one end of the main support rod (20) away from the rotating disk (4); the telescopic rod (21) slides inside the sliding groove (22); a second sliding groove (23) is provided above and below the sliding groove (22); the second sliding groove (23) is communicated with the sliding groove (22); both ends of the second sliding groove (23) do not exceed the ends of the sliding groove (22); the telescopic rod (21) ) A second sliding block (24) is provided at one end close to the sliding groove (22) and is slidably connected to the second sliding groove (23); a second external thread structure (25) is provided on the surface of the main support rod (20); a second threaded ring (26) is also screwed and connected on the surface of the main support rod (20); a second internal thread structure (27) adapted to the second external thread structure (25) is provided on the inner wall of the second threaded ring (26); the second threaded ring (26) is located behind the second sliding block (24).

2. A connection structure for high-pressure pipe connection according to claim 1, characterized in that: A circular groove (15) is provided on one side of the main connecting disk (3) close to the rotating disk (4); an annular groove (16) is provided on the inner surface of the circular groove (15); the rotating disk (4) is clamped inside the circular groove (15); and an annular sliding block (17) is provided on the inner ring of the rotating disk (4) and is engaged with the annular groove (16).

3. A connection structure for high-pressure pipe connection according to claim 1, characterized in that: The surface of the threaded collar (7) is provided with a plurality of micro grooves (18); the inner wall of the threaded collar (7) is provided with an internal thread structure (19) that matches the external thread structure (8); one end of the extension rod (6) is fixedly connected to the rotating disk (4); and the other end of the extension rod (6) is fixedly connected to the threaded collar (7).

4. A connection structure for high-pressure pipe connection according to claim 1, characterized in that: A pressure relief valve (28) is arranged above the surface of the connecting pipe (5), and the pressure relief valve (28) includes a pressure relief pipe (29) and a closing body (30). The pressure relief pipe (29) is communicated with the connecting pipe (5), and the closing body (30) is clamped inside the pressure relief pipe (29). A chuck (31) is arranged at the bottom of the part of the closing body (30) that passes through the pressure relief pipe (29), and the diameter of the chuck (31) is larger than the aperture of the pressure relief pipe (29).

5. A connection structure for high-pressure pipe connection according to claim 4, characterized in that: The upper end surface of the closing body (30) is also provided with a connecting body (32), and first threaded holes (33) are provided on both sides of the surface of the connecting body (32), and second threaded holes (34) are provided on both sides of the upper end surface of the pressure relief pipe (29), and the first threaded hole (33) and the second threaded hole (34) are connected through a second threaded rod (35).

6. A connection structure for high-pressure pipe connection according to claim 5, characterized in that: The upper end surface of the pressure relief pipe (29) is recessed inwardly and is provided with a step body (36), the diameter of the step body (36) is larger than the hole diameter at the center of the pressure relief pipe (29), the outer ring above the closing body (30) is provided with a rubber sealing pad (37) engaged with the step body (36), and the lower surface of the step body (36) is provided with a pressure relief hole (38), and the pressure relief hole (38) vertically downward penetrates the pressure relief pipe (29) and communicates with the interior of the connecting pipe (5).

7. A connection structure for high-pressure pipe connection according to claim 1, characterized in that: The inner side surfaces of the first connection disk (10) and the second connection disk (11) are both provided with rubber sealing rings (39), and the inner wall of the connection pipe (5) is attached with a rubber sealing layer (40).

8. A method for connecting a connection structure for high-pressure pipe fittings according to any one of claims 1 to 7, characterized in that: The steps include: S1: High-pressure pipeline connection: When two high-pressure pipelines need to be connected, one end of the high-pressure pipeline is inserted into the interior of the connecting pipeline (5) and squeezed inward with force, thereby slightly propping up the connecting pipeline (5) with the through groove (9) structure portion, and then the threaded collar (7) is forcefully rotated in the direction of the through groove (9), and the supported connecting pipeline (5) is contracted and squeezed by utilizing the rotation and connection of the internal thread structure (19) and the external thread structure (8), thereby fixing the high-pressure pipeline inside the connecting pipeline (5). During the rotation of the threaded collar (7), one end of the extension rod (6) is driven to The second end of the telescopic rod (21) is extended, and the other end is connected to the rotating disk (4) and rotates accordingly. When the threaded collar (7) is rotated and the high-pressure pipeline is fixed, the telescopic rod (21) slides in the sliding groove (22) and extends to a certain distance. Then, by rotating the second threaded collar (26), the second external thread structure (25) and the second internal thread structure (27) are screwed and connected to make the second threaded collar (26) rotate on the surface of the main support rod (20) toward the telescopic rod (21) until it contacts the second slider (24). The two pipelines are connected to the first connection structure (1) and the second connection structure (2) in the same manner. S2: Combined connection: After the two high-pressure pipelines are respectively connected to the first connection structure (1) and the second connection structure (2), the first connection structure (1) and the second connection structure (2) need to be connected again. When connecting, the first connection structure (1) and the second connection structure (2) are brought into close contact with each other. At this time, a plurality of threaded rods (12) are inserted into a plurality of through holes, and then a plurality of nuts (14) are used to screw, connect and fix the plurality of threaded rods (12), thereby realizing the connection and fixation of the two high-pressure pipelines.

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