Pipeline crossover coupling with telescopic compensation function

Abstract

The invention relates to the field of pipeline joints, in particular to a pipeline adapter with telescopic compensation, which comprises a metal corrugated pipe, a first adapter and a second adapter which are communicated with the metal corrugated pipe are respectively mounted at two ends of the metal corrugated pipe, and a twisted plate is fixedly connected to one end of a connecting lug. Supporting lugs perpendicular to the connecting lugs are installed at the ends, away from the connecting lugs, of the twisting plates, two end discs are arranged between the two supporting lugs located on the same side of the metal corrugated pipe, a plurality of connecting plates are annularly installed between the two end discs at equal intervals, and two discs are slidably installed in the space formed by the two end discs and the connecting plates. The metal corrugated pipe connecting device has the following beneficial effects that stress is prevented from completely acting on the connecting portions of the metal corrugated pipe and the first adapter and the connecting portions of the metal corrugated pipe and the second adapter; and the welding failure condition of the connecting parts of the metal corrugated pipe, the first adapter and the second adapter is prevented.

Description

Technical Field

[0001] The invention discloses a pipeline conversion joint with telescopic compensation, belonging to the field of pipeline joints. Background Art

[0002] A pipe conversion joint is a fitting used to connect pipes of different diameters or different types. In order to eliminate stress at the pipe connection site, a metal bellows is often installed between two pipes of different diameters. Adapters for connecting pipes of different diameters are installed at both ends of the metal bellows. Since the wall thickness of the metal bellows is thin, the connection range between the metal bellows and the adapter is small. When the metal bellows is in a stretched state, the connection between the metal bellows and the adapter is subject to the stress generated by the pipe during thermal expansion and contraction, resulting in open welds at the welding site between the metal bellows and the adapter, and insufficient reliability. Summary of the invention

[0003] In view of the shortcomings of the prior art, the object of the present invention is to provide a pipeline conversion joint with telescopic compensation to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a pipe conversion joint with telescopic compensation, including a metal bellows, wherein the first adapter and the second adapter communicated with the metal bellows are respectively installed at both ends of the metal bellows, the first adapter is processed with a first notch on the outer surface, and the second adapter is processed with a second notch on the outer surface, a first compression joint is installed in the first notch by means of a screw and a second nut, and a second compression joint is installed in the second notch by means of a screw and a second nut, two connecting ears are installed in the first notch and the second notch, one end of the connecting ear is connected and fixed with a twisting plate, and the end of the twisting plate away from the connecting ear is installed with A support ear is arranged perpendicular to the connecting ear, and two end plates are provided between the two support ears on the same side of the metal bellows. A plurality of connecting plates are installed in a ring-shaped and equidistant manner between the two end plates. Two circular discs are slidably installed in the space formed by the two end plates and the plurality of connecting plates. Screws are installed in the middle position of the opposite sides of the two circular discs, and the screws are arranged along the length direction of the metal bellows. Guide holes are opened in the middle position of the opposite surfaces of the two end plates, and the ends of the screws away from the circular discs pass through the guide holes. The two screws on the same side of the metal bellows are respectively connected to the two support ears on the same side of the metal bellows, and a spring in a compressed state is provided between the circular disc and the end plate, and the spring is sleeved on the screw.

[0005] Specifically, a through hole is provided on one side of the connecting ear, countersunk holes are symmetrically provided on the outer surfaces of the first crimping joint and the second crimping joint, two hexagonal grooves are symmetrically provided on the outer surfaces of the first adapter and the second adapter, the hexagonal groove, the countersunk hole and the through hole are aligned, the second nut is inserted in the hexagonal groove, and one end of the screw passes through the countersunk hole and the through hole in sequence and is threadedly connected to the second nut.

[0006] Specifically, a through hole is formed on one side of the ear facing the end plate, and the end of the screw rod away from the disc passes through the through hole. First nuts are provided on both sides of the through hole along the length direction of the screw rod, and the first nuts are threadedly connected to the screw rod.

[0007] Specifically, a first large semicircular groove is processed in the first notch, a first circular groove is processed in the end of the first large semicircular groove close to the metal bellows, a second large semicircular groove is processed in the side of the first crimping head facing the first large semicircular groove, a thick tube is inserted in the space formed by the first large semicircular groove and the second large semicircular groove, an end of the thick tube close to the metal bellows is provided with a large limiting ring connected and fixed to the thick tube, the large limiting ring is inserted in the first circular groove, a first small semicircular groove is processed in the second notch, a second circular groove is processed in the end of the first small semicircular groove close to the metal bellows, a second small semicircular groove is processed in the side of the second crimping head facing the first small semicircular groove, a thin tube is inserted in the space formed by the first small semicircular groove and the second small semicircular groove, an end of the thin tube close to the metal bellows is provided with a small limiting ring connected and fixed to the thin tube, and the small limiting ring is inserted in the second circular groove.

[0008] Specifically, a large sealing ring is provided on the side of the large limiting ring facing the metal bellows, the large sealing ring is sleeved on the thick tube, and the large sealing ring is fitted with the inner wall of the first circular groove. A small sealing ring is provided on the side of the small limiting ring facing the metal bellows, the small sealing ring is sleeved on the thin tube, and the small sealing ring is fitted with the inner wall of the second circular groove.

[0009] Specifically, a plurality of blocking rods are equidistantly arranged in a circular shape at the edge of one side of the disk facing the spring, an end of the blocking rod close to the disk is processed with an external thread, a plurality of threaded blind holes are equidistantly arranged in a circular shape at the edge of one side of the disk facing the spring, one end of the blocking rod processed with the external thread is threadedly connected in the threaded blind hole, and the blocking rod is arranged parallel to the screw rod.

[0010] Specifically, a positioning hole is provided in the middle of one side of the disc facing the screw rod, and one end of the screw rod is connected and fixed in the positioning hole.

[0011] Specifically, the connecting plate and the twisting plate are an integrally formed structure, and the supporting ear and the twisting plate are an integrally formed structure.

[0012] Beneficial effects of the present invention:

[0013] 1. Place one end of the thick tube in the space formed by the first large semicircular groove and the second large semicircular groove, then place the large limiting ring in the first circular groove, place one end of the thin tube in the space formed by the first small semicircular groove and the second small semicircular groove, then place the small limiting ring in the second circular groove, and then use the fastener formed by the screw and the second nut to connect the first adapter and the first crimping joint, and connect the second adapter and the second crimping joint to complete the assembly of the thick tube, the thin tube and the metal bellows. Because the metal bellows has the function of expansion and contraction compensation, it can achieve stress buffering at the connection between the thick tube and the thin tube, thereby improving the reliability of the connection.

[0014] 2. Align the through hole on the connecting ear with the countersunk hole and the hexagonal slot, then make one end of the screw pass through the countersunk hole and the through hole and threadedly connect with the second nut in the hexagonal slot, thereby completing the assembly of the first crimping head and the first adapter, and the assembly of the second crimping head and the second adapter. At the same time, the position of the connecting ear is restricted, and there is no need to restrict the position of the connecting ear by adding screws, thereby reducing the use of screws and there is no need to change the shapes of the first adapter and the second adapter.

[0015] 3. Adjust the relative position of the screw and the lug along the through hole. At this time, the position of the disc in the space formed by the two end discs and the multiple connecting plates changes, that is, the degree of spring extrusion changes, until the degree of spring extrusion meets the needs. Then, use the two first nuts to limit the relative position of the screw and the lug to adjust the compression degree of the spring in the initial state as needed. When the compression degree of the spring increases, the elongated length of the metal bellows becomes smaller, and vice versa, the elongated degree of the metal bellows becomes larger, thereby achieving the purpose of adjusting the expansion and contraction range of the metal bellows as needed.

[0016] 4. Under the action of the spring rebound force, the two ends of the metal bellows tend to move inward. When the thick tube or the thin tube pulls the metal bellows, the force received by the metal bellows will act on the structure formed by the screw, the lug, the end plate, the disc, etc., to avoid the stress acting completely on the connection between the metal bellows and the first adapter and the second adapter, to prevent the metal bellows from having open welding at the connection between the first adapter and the second adapter, and to improve reliability.

[0017] 5. Install multiple blocking rods on one side of the disc. When the spring is in a compressed state, after one end of the blocking rod contacts the end disc, the minimum distance between the disc and the end disc is limited. On the one hand, it limits the maximum range of elongation of the metal bellows, and on the other hand, it protects the spring to prevent the spring from being excessively squeezed, deformed and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 It is a structural schematic diagram of a pipeline conversion joint with telescopic compensation according to the present invention;

[0020] Figure 2 It is a schematic diagram of assembling a connecting ear, a first adapter, a second adapter and a metal bellows in a pipe conversion joint with telescopic compensation according to the present invention;

[0021] Figure 3 It is a schematic assembly diagram from another perspective of a connecting ear, a first adapter, a second adapter and a metal bellows in a pipe conversion joint with telescopic compensation of the present invention;

[0022] Figure 4 It is a schematic diagram of assembling the support ear, the twisting plate and the connecting ear in a pipe conversion joint with telescopic compensation according to the present invention;

[0023] Figure 5 It is a schematic diagram of assembling a connecting plate and an end plate in a pipeline conversion joint with telescopic compensation according to the present invention;

[0024] Figure 6 It is a schematic diagram of the assembly of a spring, a blocking rod, a disc and a screw in a pipeline conversion joint with telescopic compensation according to the present invention;

[0025] Figure 7 It is a schematic diagram of assembling a thick pipe and a first crimping joint in a pipeline conversion joint with telescopic compensation according to the present invention;

[0026] Figure 8 It is a schematic diagram of assembling a capillary tube and a second crimping joint in a pipeline conversion joint with telescopic compensation according to the present invention;

[0027] In the figure: 1, metal bellows, 2, first crimping joint, 3, screw, 4, thick tube, 5, screw rod, 6, support ear, 7, first nut, 8, spring, 9, disc, 10, connecting plate, 11, end plate, 12, second crimping joint, 13, thin tube, 14, second adapter, 15, first small semicircular groove, 16, second circular groove, 17, twisted plate, 18, connecting ear, 19, second nut, 20, hexagonal groove, 21, through hole, 22, first adapter, 23, first large semicircular groove, 24, first circular groove, 25, perforation, 26, guide hole, 27, blocking rod, 28, large limiting ring, 29, large sealing ring, 30, countersunk hole, 31, small limiting ring, 32, small sealing ring. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] See also Figure 1-Figure 3 , Figure 7 and Figure 8 The present invention provides a technical solution: a pipe conversion joint with telescopic compensation, comprising a metal bellows 1, a first adapter 22 and a second adapter 14 communicating with the metal bellows 1 are respectively installed at both ends of the metal bellows 1, a first notch is processed on the outer surface of the first adapter 22, a second notch is processed on the outer surface of the second adapter 14, a first compression joint 2 is installed in the first notch by means of a screw 3 and a second nut 19, and a second compression joint 12 is installed in the second notch by means of a screw 3 and a second nut 19;

[0030] A first large semicircular groove 23 is processed in the first notch, and a first circular groove 24 is processed at one end of the first large semicircular groove 23 close to the metal bellows 1, and a second large semicircular groove is processed on a side of the first crimping head 2 facing the first large semicircular groove 23. A thick tube 4 is inserted in the space formed by the first large semicircular groove 23 and the second large semicircular groove. A large limiting ring 28 connected and fixed to the thick tube 4 is sleeved on one end of the thick tube 4 close to the metal bellows 1, and the large limiting ring 28 is inserted in the first circular groove 24. A first small semicircular groove 15 is processed in the second notch, and a second circular groove 16 is processed at one end of the first small semicircular groove 15 close to the metal bellows 1. A second small semicircular groove is processed on one side of the second crimping head 12 facing the first small semicircular groove 15, and a thin tube 13 is inserted in the space formed by the first small semicircular groove 15 and the second small semicircular groove. The thin tube 13 is close to the metal bellows. One end of the corrugated tube 1 is sleeved with a small limiting ring 31 for connecting and fixing the thin tube 13, and the small limiting ring 31 is inserted in the second circular groove 16, so that one end of the thick tube 4 is placed in the space formed by the first large semicircular groove 23 and the second large semicircular groove, and then the large limiting ring 28 is placed in the first circular groove 24, and one end of the thin tube 13 is placed in the space formed by the first small semicircular groove 15 and the second small semicircular groove, and then the small limiting ring 31 is placed in the second circular groove 16, and then the first adapter 22 and the first crimping head 2 are connected by a fastener formed by a screw 3 and a second nut 19, and the second adapter 14 and the second crimping head 12 are connected to complete the assembly of the thick tube 4, the thin tube 13 and the metal bellows 1. Because the metal bellows 1 has a telescopic compensation function, the stress of the connection between the thick tube 4 and the thin tube 13 is buffered, thereby improving the reliability of the connection.

[0031] See also Figure 1-Figure 3 , Figure 7 and Figure 8A large sealing ring 29 is provided on the side of the large limiting ring 28 facing the metal bellows 1. The large sealing ring 29 is sleeved on the thick tube 4 and fits with the inner wall of the first circular groove 24. A small sealing ring 32 is provided on the side of the small limiting ring 31 facing the metal bellows 1. The small sealing ring 32 is sleeved on the thin tube 13 and fits with the inner wall of the second circular groove 16. The large sealing ring 29 improves the sealing between the thick tube 4 and the first adapter 22, and the small sealing ring 32 improves the sealing between the thin tube 13 and the second adapter 14.

[0032] See also Figure 1-Figure 4 , Figure 7 and Figure 8 Two connecting ears 18 are installed in the first notch and the second notch, one end of the connecting ear 18 is connected and fixed with a twisting plate 17, and the end of the twisting plate 17 away from the connecting ear 18 is installed with a support ear 6 arranged perpendicular to the connecting ear 18, the connecting plate 10 and the twisting plate 17 are an integrally formed structure, the support ear 6 and the twisting plate 17 are an integrally formed structure, a through hole 25 is opened on one side of the connecting ear 18, the outer surface of the first crimping head 2 and the outer surface of the second crimping head 12 are symmetrically opened with countersunk holes 30, the outer surface of the first adapter 22 and the outer surface of the second adapter 14 are symmetrically opened with two hexagonal grooves 20, the hexagonal grooves 20 and the countersunk holes 30 are aligned with the through holes 25, and the second nut 19 is inserted in the hexagonal In the groove 20, one end of the screw 3 passes through the countersunk hole 30 and the through hole 25 in sequence and is threadedly connected with the second nut 19, so that the through hole 25 on the connecting ear 18 is aligned with the countersunk hole 30 and the hexagonal groove 20, and then one end of the screw 3 passes through the countersunk hole 30 and the through hole 25 and is threadedly connected with the second nut 19 in the hexagonal groove 20, completing the assembly of the first crimping head 2 and the first adapter 22, and the assembly of the second crimping head 12 and the second adapter 14. At the same time, the position of the connecting ear 18 is restricted, and there is no need to increase the screw 3 to restrict the position of the connecting ear 18, thereby reducing the use of the screw 3 and there is no need to change the shapes of the first adapter 22 and the second adapter 14.

[0033] See also Figure 1-Figure 6, two end plates 11 are arranged between the two support ears 6 on the same side of the metal bellows 1, and a plurality of connecting plates 10 are installed in a ring-shaped and equidistant manner between the two end plates 11. Two discs 9 are slidably installed in the space formed by the two end plates 11 and the plurality of connecting plates 10, and screw rods 5 are installed in the middle of the opposite sides of the two discs 9. The screw rods 5 are arranged along the length direction of the metal bellows 1, wherein a positioning hole is opened in the middle of the side of the disc 9 facing the screw rod 5, so that one end of the screw rod 5 is connected and fixed in the positioning hole, thereby improving the stability of the connection between the screw rod 5 and the disc 9, and a guide hole 26 is opened in the middle of the opposite sides of the two end plates 11, and the end of the screw rod 5 away from the disc 9 passes through the guide hole 26, which is located on the same side of the metal bellows 1 The two screw rods 5 on the side are respectively connected with the two support ears 6 on the same side of the metal bellows 1. A spring 8 in a compressed state is provided between the disc 9 and the end disc 11. The spring 8 is sleeved on the screw rod 5. Under the action of the rebound force of the spring 8, the two ends of the metal bellows 1 tend to move inward. When the thick tube 4 or the thin tube 13 pulls the metal bellows 1, the force received by the metal bellows 1 will act on the structure formed by the screw rod 5, the support ears 6, the end disc 11, the disc 9, etc., to avoid stress acting completely on the connection parts of the metal bellows 1 and the first adapter 22, the second adapter 14, to prevent the metal bellows 1 from having open welding at the connection parts of the first adapter 22, the second adapter 14, and to improve reliability.

[0034] See also Figure 1-Figure 6 A through hole 21 is provided on the side of the ear 6 facing the end disk 11, and the end of the screw 5 away from the disc 9 passes through the through hole 21. First nuts 7 are provided on both sides of the through hole 21 along the length direction of the screw 5. The first nut 7 is threadedly connected to the screw 5, and the relative position of the screw 5 and the ear 6 is adjusted along the through hole 21. At this time, the position of the disc 9 in the space formed by the two end disks 11 and the multiple connecting plates 10 changes, that is, the degree of compression of the spring 8 changes, until the degree of compression of the spring 8 meets the needs, and then the two first nuts 7 are used to limit the relative position of the screw 5 and the ear 6, so as to adjust the compression degree of the spring 8 in the initial state as needed. When the compression degree of the spring 8 increases, the elongated length of the metal bellows 1 becomes smaller, and vice versa, the elongated degree of the metal bellows 1 becomes larger, so as to achieve the purpose of adjusting the telescopic range of the metal bellows 1 as needed.

[0035] See also Figure 1-Figure 6A plurality of blocking rods 27 are equidistantly arranged in a ring shape at the edge of one side of the disk 9 facing the spring 8, and an end of the blocking rod 27 close to the disk 9 is processed with an external thread. A plurality of threaded blind holes are equidistantly arranged in a ring shape at the edge of one side of the disk 9 facing the spring 8, so that one end of the blocking rod 27 arranged parallel to the screw rod 5 and processed with an external thread is threadedly connected in the threaded blind hole to complete the assembly of the blocking rod 27 and the disk 9, and a plurality of blocking rods 27 are installed on one side of the disk 9. When the spring 8 is in a compressed state, after one end of the blocking rod 27 contacts with the end disk 11, the minimum spacing between the disk 9 and the end disk 11 is limited, which on the one hand limits the maximum range of elongation of the metal bellows 1, and on the other hand protects the spring 8 to prevent the spring 8 from being excessively squeezed, deformed and damaged.

[0036] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipe conversion joint with expansion compensation, comprising a metal bellows (1), characterized in that: A first adapter (22) and a second adapter (14) which are in communication with the metal bellows (1) are respectively installed at both ends of the metal bellows (1); a first notch is machined on the outer surface of the first adapter (22); a second notch is machined on the outer surface of the second adapter (14); a first crimping joint (2) is installed in the first notch by means of a screw (3) and a second nut (19); a second crimping joint (12) is installed in the second notch by means of a screw (3) and a second nut (19); two connecting ears (18) are installed in the first notch and the second notch; one end of the connecting ear (18) is connected and fixed with a twisting plate (17); an end of the twisting plate (17) away from the connecting ear (18) is installed with a support ear (6) arranged perpendicular to the connecting ear (18); two support ears (6) on the same side of the metal bellows (1) are provided. Two end plates (11) are arranged between the two end plates (11), and a plurality of connecting plates (10) are installed in an annular manner and equidistantly between the two end plates (11). Two discs (9) are slidably installed in the space formed by the two end plates (11) and the plurality of connecting plates (10). A screw rod (5) is installed at the middle position of the opposite sides of the two discs (9), and the screw rod (5) is arranged along the length direction of the metal bellows (1). A guide hole (26) is opened at the middle position of the opposite sides of the two end plates (11), and the end of the screw rod (5) away from the disc (9) passes through the guide hole (26). The two screw rods (5) on the same side of the metal bellows (1) are respectively connected to the two ears (6) on the same side of the metal bellows (1). A spring (8) in a compressed state is arranged between the disc (9) and the end plate (11), and the spring (8) is sleeved on the screw rod (5).

2. A pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: A through hole (25) is formed on one side of the connecting ear (18); countersunk holes (30) are symmetrically formed on the outer surface of the first crimping joint (2) and the outer surface of the second crimping joint (12); two hexagonal grooves (20) are symmetrically formed on the outer surface of the first adapter (22) and the outer surface of the second adapter (14); the hexagonal groove (20), the countersunk hole (30) and the through hole (25) are aligned; the second nut (19) is inserted into the hexagonal groove (20); one end of the screw (3) passes through the countersunk hole (30) and the through hole (25) in sequence and is threadedly connected to the second nut (19).

3. A pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: A through hole (21) is formed on a side of the support ear (6) facing the end plate (11); an end of the screw rod (5) away from the disc (9) passes through the through hole (21); first nuts (7) are provided on both sides of the through hole (21) along the length direction of the screw rod (5); and the first nut (7) is threadedly connected to the screw rod (5).

4. A pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: A first large semicircular groove (23) is machined in the first notch, a first circular groove (24) is machined at one end of the first large semicircular groove (23) close to the metal bellows (1), a second large semicircular groove is machined on a side of the first crimping joint (2) facing the first large semicircular groove (23), a thick tube (4) is inserted in the space formed by the first large semicircular groove (23) and the second large semicircular groove, a large limiting ring (28) connected and fixed to the thick tube (4) is sleeved at one end of the thick tube (4) close to the metal bellows (1), the large limiting ring (28) is inserted in the first circular groove (24), and the first crimping joint (2) is provided with a plurality of holes. A first small semicircular groove (15) is processed in the second notch, a second circular groove (16) is processed at one end of the first small semicircular groove (15) close to the metal bellows (1), a second small semicircular groove is processed on a side of the second crimping head (12) facing the first small semicircular groove (15), a thin tube (13) is inserted in the space formed by the first small semicircular groove (15) and the second small semicircular groove, a small limiting ring (31) is sleeved on one end of the thin tube (13) close to the metal bellows (1) to connect and fix the thin tube (13), and the small limiting ring (31) is inserted in the second circular groove (16).

5. A pipeline conversion joint with telescopic compensation according to claim 4, characterized in that: A large sealing ring (29) is provided on the side of the large limiting ring (28) facing the metal bellows (1), and the large sealing ring (29) is sleeved on the thick tube (4). The large sealing ring (29) fits with the inner wall of the first circular groove (24). A small sealing ring (32) is provided on the side of the small limiting ring (31) facing the metal bellows (1), and the small sealing ring (32) is sleeved on the thin tube (13). The small sealing ring (32) fits with the inner wall of the second circular groove (16).

6. The pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: A plurality of blocking rods (27) are equidistantly arranged in a circular shape on the edge of one side of the disk (9) facing the spring (8); one end of the blocking rod (27) close to the disk (9) is processed with an external thread; a plurality of threaded blind holes are equidistantly arranged in a circular shape on the edge of one side of the disk (9) facing the spring (8); one end of the blocking rod (27) processed with an external thread is threadedly connected in the threaded blind hole; and the blocking rod (27) is arranged in parallel with the screw rod (5).

7. The pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: A positioning hole is provided in the middle of one side of the disc (9) facing the screw rod (5), and one end of the screw rod (5) is connected and fixed in the positioning hole.

8. The pipeline conversion joint with telescopic compensation according to claim 1, characterized in that: The connecting plate (10) and the twisting plate (17) are an integrally formed structure, and the supporting ear (6) and the twisting plate (17) are an integrally formed structure.

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