CN215445345U - Composite large-diameter drainage pipeline mounting structure - Google Patents

Abstract

The utility model relates to a compound major diameter mounting structure for drainage pipe, it relates to the piping erection field, and it includes adjacent two through flange joint between the PE pipe, the connection is established on the PE pipe to flange movable sleeve, be equipped with the boss that is used for preventing the flange landing from the PE pipe on the end wall of PE pipe, adjacent two equal movable sleeve is equipped with the locating rack on the PE pipe, the locating rack sets up on the PE pipe and is close to one side of PE pipe end wall, the locating rack passes through clamping component to be fixed on the PE pipe, adjacent two connect through locating component between the locating rack. This application has the effect that improves major diameter drainage pipe installation effectiveness.

Description

Composite large-diameter drainage pipeline mounting structure

Technical Field

The application relates to the field of pipeline installation, in particular to a composite large-diameter installation structure for a drainage pipeline.

Background

Urban water supply system and drainage system, for short water supply and drainage. The large-diameter PE pipe is widely applied to water supply and drainage.

At present, two large-diameter PE pipelines are installed through a hot-melt butt joint installation method, during installation, the sections of the two PE pipelines are milled and flattened by an electric milling cutter respectively, then an electric heating plate is electrified to be heated up and then is placed between the sections of the two PE pipelines, so that the sections of the two PE pipelines are subjected to hot melting, finally, the sections of the two fused PE pipelines are fully butted by a plurality of workers, and after a connecting junction between the two PE pipelines is cooled and hardened, the installation and the fixation between the two PE pipelines are finally realized.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the PE pipe is installed, the cross sections of the two PE pipes are difficult to align by personnel, and the installation efficiency of the PE pipes is low.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the installation effectiveness of the PE pipe that two relative sections of PE pipe are difficult to align and lead to is low in the work progress, the application provides a compound major diameter mounting structure for drainage pipe.

The application provides a compound major diameter is mounting structure for drainage pipe adopts following technical scheme: the utility model provides a compound major diameter is mounting structure for drainage pipe, includes a plurality of PE pipe, adjacent two through flange joint between the PE pipe, the flange movable sleeve is established and is connected on the PE pipe, be equipped with the boss that is used for preventing flange landing from the PE pipeline on the end wall of PE pipe, adjacent two equal movable sleeve is equipped with the locating rack on the PE pipe, the locating rack sets up on the PE pipe and is close to one side of PE pipe end wall, the locating rack passes through clamping component to be fixed on the PE pipe, adjacent two connect through locating component between the locating rack.

By adopting the technical scheme, during installation, the positioning frame is sleeved on the PE pipe, the clamping assembly is used for fixing the positioning frame on the PE pipe, and then the positioning assembly is used for fixedly connecting the two positioning frames, so that the positioning of the two PE pipes is realized, and the sections of the two PE pipes are convenient to align; finally, aligning the bosses on the two PE pipes, and connecting the two PE pipes through flanges; by adopting the installation mode, the sections of the two PE pipes are aligned conveniently, and the installation efficiency between the two PE pipes is improved.

Optionally, the locating rack includes upper plate, hypoplastron and two centre gripping arms, enclose between upper plate, hypoplastron and two centre gripping arms and close and be formed with the location space that supplies the PE pipe to pass, all be equipped with the hole that slides that supplies the centre gripping arm to pass on upper plate and the hypoplastron, all be equipped with on upper plate and the hypoplastron with the pipe wall complex recess of PE pipe, all be equipped with the retaining member that is used for fixed centre gripping arm on upper plate and the hypoplastron.

By adopting the technical scheme, during installation, the positioning frame is sleeved on the PE pipe, then the upper plate and the lower plate slide on the clamping arm until the upper plate and the lower plate slide on the clamping arm, and after the grooves on the upper plate and the lower plate abut against the PE pipe, the upper plate and the lower plate are fixedly connected to the clamping arm by utilizing the locking piece, and the PE pipe is clamped by the upper plate and the lower plate; the positioning frame formed by adopting the structure combination is convenient to disassemble and assemble.

Optionally, the retaining member includes latch segment and thrust spring, set up the holding tank that is used for holding latch segment and thrust spring on the centre gripping arm, the latch segment slides and sets up in the holding tank, thrust spring's one end links to each other with the latch segment, thrust spring's the other end links to each other with the cell wall that the holding tank notch is relative, be equipped with on the pore wall of sliding hole orientation holding tank with latch segment matched with locking groove, the longitudinal section area of latch segment is by keeping away from one side of thrust spring to degressive in a lateral direction that is close to thrust spring.

By adopting the technical scheme, when the clamping arm is installed, the locking block is firstly pressed into the accommodating groove, at the moment, the thrust spring is in a compressed state, and then the clamping arm penetrates through the upper plate and the lower plate through the sliding hole; then upper plate and hypoplastron slide, and the centre gripping arm slides in the downthehole slip simultaneously, and when the holding tank was just to the locking groove, the latch segment was under thrust spring's elastic action, and the latch segment cunning has realized the fixed connection between centre gripping arm, upper plate and the hypoplastron this moment, and this locking mode is convenient operation, simple convenient, is favorable to realizing the quick installation to the centre gripping arm under the installation environment of difference.

Optionally, the clamping assembly comprises a supporting block, a screw rod and a hand wheel, the supporting block is tightly supported on the side wall of the PE pipe, a supporting pad is arranged on the side wall, close to the PE pipe, of the supporting block, one end of the screw rod is rotationally connected with the side wall, far away from the PE pipe, of the supporting block, the other end of the screw rod penetrates through the clamping arm and is far away from the side wall of the PE pipe, the screw rod is in threaded connection with the clamping arm, and the hand wheel is fixedly arranged at one end, far away from the supporting block, of the screw rod.

By adopting the technical scheme, the hand wheel is rotated, so that the screw rod drives the abutting block to move towards the side wall of the PE pipe, and when the abutting pad on the abutting block is attached to the side wall of the PE pipe, the PE pipe is positioned and clamped, and the PE pipe is stably fixed in the positioning frame.

Optionally, the positioning assembly comprises an extension block and an extension rod, the extension rod is in splicing fit with the extension block, the extension block is arranged on one of the positioning frames, the extension rod is arranged on the other positioning frame, a splicing hole is formed in the extension block, a plurality of positioning holes are formed in the extension rod along the axial direction of the PE pipe, a splicing rod is inserted in the splicing hole, one end of the splicing rod penetrates through the splicing hole and is in splicing fit with the positioning holes, a flange is arranged at one end, away from the positioning holes, of the splicing rod, a tension spring is sleeved on the splicing rod, one end of the tension spring is connected with the flange, and the other end of the tension spring is connected with the extension block.

By adopting the technical scheme, the positioning between the positioning frames on the two PE pipes is realized through the insertion and matching of the extension block and the extension rod; after the extension rod inserts in the extension piece, the spliced eye is passed and inside extending to the extension piece to the spliced eye under tension spring's tensile force effect to the spliced eye and the cooperation of locating hole, at this moment, reciprocal anchorage between two locating racks to the section alignment of personnel with two PE pipes fast has improved the installation effectiveness.

Optionally, be equipped with the support piece that is used for keeping away from the one end of flange with the inserted bar in the spliced eye on the extension piece, support piece includes dwang and rotation plectrum, dwang fixed connection is on the extension piece, rotate the plectrum and rotate the one end of connecting the setting and keeping away from the extension piece at the dwang, the lateral wall that the dwang was kept away from to the rotation plectrum is close to the lateral wall butt of grafting with the flange.

Through adopting above-mentioned technical scheme, extract the peg graft pole to the direction of keeping away from the locating hole, rotate this moment and rotate the plectrum for rotate the plectrum and keep away from the lateral wall of extension piece and peg graft pole towards the lateral wall of extension piece and laminate mutually, utilize to rotate the plectrum and fix the peg graft pole in the state that does not wear out the spliced eye, be convenient for insert the extension pole in the extension piece.

After the insertion rod is inserted into the extension block, the insertion hole is aligned with the positioning hole, then the rotation shifting piece is shifted, the side wall of the extension block and the side wall of the insertion rod facing the extension block are separated by the rotation shifting piece, and the insertion rod penetrates through the insertion hole under the elastic action of the tension spring and is matched with the positioning hole, so that the two groups of positioning frames are mutually fixed.

Optionally, a water stop gasket is arranged between the bosses on the opposite cross sections of the two adjacent PE pipes.

By adopting the technical scheme, the sealing gasket between the two bosses is utilized, so that the sealing performance of the connection between the two PE pipes is favorably enhanced.

Optionally, a hanging ring is arranged on the side wall of the upper plate, which is far away from the PE pipe.

By adopting the technical scheme, the lifting rings are matched with the lifting hooks of the crane, so that the crane can conveniently lift and transport the PE pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the two positioning frames are positioned, so that the two PE pipes are positioned, the sections of the two PE pipes are aligned conveniently, and the installation efficiency is improved;

2. the flange slides on the PE pipe and rotates, and when two PE pipes are connected, the flange rotates to find the connecting position, so that the PE pipes can be conveniently installed by personnel.

Drawings

FIG. 1 is a schematic view showing the overall structure of a composite large-diameter drain pipe installation structure according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view of the plane a-a in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic cross-sectional view of the plane B-B in fig. 1.

Fig. 5 is a schematic cross-sectional view of the plane C-C in fig. 1.

Fig. 6 is an enlarged view at B in fig. 5.

Description of reference numerals: 1. a PE pipe; 2. a flange; 3. a boss; 4. a positioning frame; 41. an upper plate; 42. a lower plate; 43. a clamp arm; 5. a locking member; 51. a locking block; 52. a thrust spring; 6. accommodating grooves; 7. a locking groove; 8. a clamping assembly; 81. a propping block; 82. a screw; 83. a hand wheel; 9. tightly abutting against the cushion; 10. a positioning assembly; 101. an extension block; 102. an extension rod; 11. inserting holes; 12. positioning holes; 13. a plug rod; 14. a flange; 15. a tension spring; 16. a support member; 161. rotating the rod; 162. rotating the shifting sheet; 17. a water stop pad; 18. a hoisting ring; 19. and (6) sliding holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses compound major diameter is mounting structure for drainage pipe.

Referring to fig. 1 and 2, the composite large-diameter installation structure for the drainage pipeline comprises a plurality of PE pipes 1, in this embodiment, the number of the PE pipes 1 can be two, the two PE pipes 1 are connected through flanges 2, the flanges 2 are rotatably and slidably sleeved on the PE pipes 1, and the two flanges 2 are fixedly connected through a plurality of bolts. The end walls of the two sides of the PE pipe 1 are soaking-melted to form bosses 3, and the bosses 3 are used for preventing the flange 2 from falling off from the end part of the PE pipe 1.

Every PE manages 1 and goes up equal movable sleeve and establish and be connected with two locating racks 4, two locating racks 4 respectively with the section one-to-one in both sides of PE pipe 1, locating rack 4 sets up and is close to sectional one side at PE pipe 1, locating rack 4 is through clamping component 8 and PE pipe 1 fixed connection, connect through locating component 10 between locating rack 4 on one of them PE pipe 1 and the locating rack 4 on another PE pipe 1, two locating racks 4 connected through locating component 10 are close to the setting each other.

Utilize locating component 10 to fix a position 4 location on two PE pipe 1, realized the location between two PE pipe 1, be favorable to lining up the section of two PE pipe 1, be convenient for through flange 2 with fixed connection between two PE pipe 1, improved the installation effectiveness to PE pipe 1.

Referring to fig. 3, a water stop gasket 17 is arranged between the bosses 3 on the opposite cross sections of the two PE pipes 1, the water stop gasket 17 is adhered to the side wall of one of the bosses 3, and the water stop gasket 17 improves the connection tightness between the PE pipes 1; hanging rings 18 are fixed on the side wall of the upper plate 41 far away from the lower plate 42, and the hanging rings 18 are matched with hooks to facilitate the transportation of the PE pipe 1 by a crane.

Referring to fig. 4, the positioning frame 4 includes an upper plate 41, a lower plate 42 and two clamping arms 43, the upper plate 41 and the lower plate 42 are disposed opposite to each other and parallel to each other, the two clamping arms 43 are disposed opposite to each other and parallel to each other, the central axes of the upper plate 41 and the lower plate 42 are perpendicular to the central axis of the clamping arms 43, and a positioning space for the PE pipe 1 to pass through is defined between the upper plate 41, the lower plate 42 and the two clamping arms 43. In this embodiment, the clamping assemblies 8 are two groups, two groups of clamping assemblies 8 are respectively in one-to-one correspondence with the two clamping arms 43, and the clamping assemblies 8 are arranged on the clamping arms 43.

All seted up on upper plate 41 and the hypoplastron 42 with the pipe wall matched with recess of PE pipe 1, the recess is the arc wall, all seted up the hole 19 that slides that supplies centre gripping arm 43 to slide on upper plate 41 and the hypoplastron 42, centre gripping arm 43 slides and connects in the hole 19 that slides, centre gripping arm 43 passes through retaining member 5 and upper plate 41, hypoplastron 42 fixed connection.

Retaining member 5 includes latch segment 51 and thrust spring 52, holding arm 43 has seted up holding tank 6 on the lateral wall with the hole 19 that slides laminating mutually, holding tank 6 in-connection has thrust spring 52 and latch segment 51, the latch segment 51 slides and connects in holding tank 6, the one end of thrust spring 52 links to each other with latch segment 51, the notch was kept away from to thrust spring 52's the other end and holding tank 6 lateral wall link to each other, set up on the lateral wall that hole 19 and holding arm 43 laminated mutually with latch segment 51 matched with locking groove 7, the latch segment 51 stretches out accent and locking groove 7 cooperation, the longitudinal section of latch segment 51 is by being close to one side of locking groove 7 to keeping away from one side of locking groove 7 and increase progressively.

When the positioning frame 4 is installed, the positioning frame 4 is firstly sleeved on the PE pipe 1, the upper plate 41 and the lower plate 42 are sleeved on the clamping arm 43 in a sliding mode, the PE pipe 1 is clamped between the upper plate 41 and the lower plate 42 by utilizing the grooves in the upper plate 41 and the lower plate 42, when the locking groove 7 is opposite to the accommodating groove 6, the locking block 51 extends out of the accommodating groove 6 under the thrust action of the thrust spring 52 and is matched with the locking groove 7, and the clamping arm 43, the upper plate 41 and the lower plate 42 are fixedly connected at the moment. By adopting the above installation manner, it is advantageous to improve the installation efficiency of the connection between the clamp arm 43, the upper plate 41, and the lower plate 42.

Referring to fig. 4, the clamping assembly 8 includes a abutting block 81, a screw rod 82 and a hand wheel 83, the axial direction of the screw rod 82 is perpendicular to the axial direction of the clamping arm 43, the screw rod 82 is in threaded connection with the clamping arm 43, one end of the screw rod 82 is rotationally connected with the side wall of the rotating block far away from the PE tube 1, the other end of the screw rod 82 extends out from the side wall of the clamping arm 43 far away from the PE tube 1 and is fixedly connected with the hand wheel 83, the hand wheel 83 is rotated, the abutting block 81 is fed towards the side wall of the PE tube 1 under the action of the screw rod 82, so that the abutting block 81 abuts against the side wall of the PE tube 1, and the abutting block 81 fixes the PE tube 1 on the positioning frame 4; the abutting pad 9 is arranged between the abutting block 81 and the PE pipe 1, and the tightness of connection between the abutting block 81 and the PE pipe 1 is enhanced.

Referring to fig. 5 and 6, the positioning assembly 10 includes an extension block 101 disposed on one of the positioning frames 4 and an extension rod 102 disposed on the other positioning frame 4, the axial directions of the extension rod 102 and the extension block 101 are the same as the axial direction of the PE pipe 1, and the extension rod 102 and the extension block 101 are in plug-in fit. In this embodiment, the number of locating component 10 can be four groups, set up four corners on locating rack 4 is close to the sectional lateral wall of PE pipe 1 respectively, a spliced eye 11 has been seted up on extension piece 101, a plurality of locating holes 12 have been seted up on extension rod 102 and along self axial, the internal slip of spliced eye 11 is connected with spliced pole 13, spliced eye 11 and locating hole 12 grafting cooperation are inserted to the one end of spliced pole 13, the other end fixed welding of spliced pole 13 has flange 14, the cover is equipped with tension spring 15 on spliced pole 13, tension spring 15's one end and extension piece 101 are connected, tension spring 15's the other end and flange 14 are connected, fixedly connected with support piece 16 on the extension piece 101, support piece 16 is used for keeping the one end that flange 14 was kept away from to spliced pole 13 inside spliced eye 11.

The support 16 includes a rotating rod 161 and a rotating shifting piece 162, the axial direction of the rotating rod 161 is perpendicular to the axial direction of the extending block 101, the rotating rod 161 is welded on the extending block 101 and is close to the insertion hole 11, one end of the rotating rod 161, which is far away from the extending block 101, is rotatably connected with the rotating shifting piece 162, and the side wall of the rotating shifting piece 162, which is far away from the extending block 101, is abutted against the side wall of the flange 14, which is close to the extending block 101.

When the extension rod 102 needs to be inserted into the extension block 101, the insertion rod 13 is firstly pulled out from the extension block 101, and meanwhile, the rotating shifting piece 162 is rotated, so that the side wall of the rotating shifting piece 162 far away from the extension block 101 is attached to the side wall of the flange 14 close to the extension block 101, and at the moment, the rotating shifting piece 162 fixes the insertion rod 13 in the insertion hole 11, so that the extension rod 102 is inserted into the extension block 101; when the inserting hole 11 is communicated with one of the positioning holes 12, the rotating shifting piece 162 is rotated to separate the rotating shifting piece 162 from the inserting rod 13, and at the moment, the inserting rod 13 slides towards the extension block 101 under the action of the tension spring 15, so that the inserting rod 13 is inserted into the positioning hole 12, the extension block 101 and the extension rod 102 are fixed, and the positioning frames 4 on two sides of the section of the PE pipe 1 are fixedly connected.

Utilize dwang 161 and rotation plectrum 162's cooperation, be favorable to inserting extension rod 102 with the position relatively fixed of peg 13 and flange 14 when extending block 101 for when extension rod 102 inserts in extending block 101, do not need personnel's manual stay peg 13, in the personnel of being convenient for insert extension rod 102 in extending block 101, convenient high-efficient.

The implementation principle of the composite mounting structure for the large-diameter drainage pipeline in the embodiment of the application is as follows: during installation, the positioning frame 4 is firstly sleeved on the PE pipe 1, then the locking block 51 is pressed into the accommodating groove 6, the clamping arm 43 penetrates through the upper plate 41 and the lower plate 42 through the sliding hole 19, the upper plate 41 and the lower plate 42 are slid until the groove is attached to the side wall of the PE pipe 1, the accommodating groove 6 is right aligned to the locking groove 7, at the moment, the locking block 51 extends out of the accommodating groove 6 under the thrust action of the thrust spring 52 and is matched with the locking groove 7, and at the moment, the fixed connection among the clamping arm 43, the upper plate 41 and the lower plate 42 is realized.

Through rotating the hand wheel 83, the screw 82 drives the abutting block 81 to move towards the side wall of the PE pipe 1, and when the abutting pad 9 on the abutting block 81 abuts against the side wall of the PE pipe 1, clamping of the PE pipe 1 is achieved, and finally the positioning frame 4 is fixed on the PE pipe 1.

When the extension rod 102 needs to be inserted into the extension block 101, the rotating shifting piece 162 is rotated, so that the side wall of the rotating shifting piece 162 far away from the extension block 101 is abutted with the side wall of the flange 14 close to the extension block 101, at this time, the inserting rod 13 does not penetrate through the inserting hole 11, and the extension rod 102 can be inserted into the extension block 101; when locating hole 12 and spliced eye 11 are relative, rotate and rotate plectrum 162 and make rotation plectrum 162 and flange 14 break away from, peg rod 13 drives peg rod 13 to extension piece 101 internal motion under tension spring 15's elastic force this moment, make peg rod 13 and locating hole 12 cooperate, extension piece 101 and extension rod 102 are fixed, and then make the locating rack 4 on the cross section both sides of PE pipe 1 be connected, and then the cross section of being convenient for two PE pipes 1 aligns, be favorable to improving the installation effectiveness.

And finally, connecting the two flanges 2 by using bolts, hoisting the assembled PE pipe 1 by using a hoisting ring 18 by using a crane and loading the PE pipe 1 into a groove which is formed in advance, and realizing the installation of the PE pipe 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a compound major diameter is mounting structure for drainage pipe, includes a plurality of PE pipe (1), its characterized in that: adjacent two connect through flange (2) between PE pipe (1), flange (2) movable sleeve is established and is connected on PE pipe (1), be equipped with boss (3) that are used for preventing flange (2) from saying from PE pipe (1) landing on the end wall of PE pipe (1), adjacent two equal movable sleeve is equipped with locating rack (4) on PE pipe (1), locating rack (4) set up on PE pipe (1) and are close to one side of PE pipe (1) end wall, locating rack (4) are fixed on PE pipe (1) through clamping components (8), adjacent two connect through locating component (10) between locating rack (4).

2. The mounting structure for a composite large-diameter drain pipeline according to claim 1, wherein: the utility model discloses a PE pipe, including locating rack (4), locating rack (4) include upper plate (41), hypoplastron (42) and two centre gripping arms (43), enclose between upper plate (41), hypoplastron (42) and two centre gripping arms (43) and close the location space that is formed with and supplies PE pipe (1) to pass, all be equipped with on upper plate (41) and hypoplastron (42) and supply the hole (19) that slides that centre gripping arm (43) passed, all be equipped with on upper plate (41) and hypoplastron (42) with the pipe wall complex recess of PE pipe (1), all be equipped with retaining member (5) that are used for fixed centre gripping arm (43) on upper plate (41) and hypoplastron (42).

3. The mounting structure for a composite large-diameter drain pipeline according to claim 2, wherein: retaining member (5) are including latch segment (51) and thrust spring (52), offer holding tank (6) that are used for holding latch segment (51) and thrust spring (52) on centre gripping arm (43), latch segment (51) slide and set up in holding tank (6), the one end of thrust spring (52) links to each other with latch segment (51), the other end and the relative cell wall of holding tank (6) notch of thrust spring (52) link to each other, hole (19) that slides are equipped with on the pore wall towards holding tank (6) with latch segment (51) matched with locking groove (7), the vertical sectional area of latch segment (51) is by being close to one side of thrust spring (52) to keeping away from one side of thrust spring (52) and progressively decrease.

4. The mounting structure for a composite large-diameter drain pipeline according to claim 2, wherein: clamping assembly (8) are including supporting tight piece (81), screw rod (82) and hand wheel (83), support tight piece (81) and tightly support on the lateral wall of PE pipe (1), it supports tight pad (9) to be equipped with on the lateral wall that tight piece (81) is close to PE pipe (1) to support tight, the one end of screw rod (82) is rotated with the lateral wall that PE pipe (1) was kept away from to tight piece (81) and is connected, the other end of screw rod (82) passes centre gripping arm (43) and keeps away from the lateral wall of PE pipe (1), screw rod (82) threaded connection is on centre gripping arm (43), hand wheel (83) are fixed to be set up and are kept away from the one end of tight piece (81) in screw rod (82).

5. The mounting structure for a composite large-diameter drain pipeline according to claim 1, wherein: the positioning assembly (10) comprises an extension block (101) and an extension rod (102), the extension block (101) is arranged on one of the positioning frames (4), the extension rod (102) is arranged on the other positioning frame (4), the extension rod (102) is in splicing fit with the extension block (101), a splicing hole (11) is formed in the extension block (101), a plurality of positioning holes (12) are formed in the extension rod (102) along the axial direction of the PE pipe (1), a splicing rod (13) is spliced in the splicing hole (11), one end of the splicing rod (13) penetrates through the splicing hole (11) and is in splicing fit with the positioning holes (12), a flange (14) is arranged at one end, far away from the positioning holes (12), of the splicing rod (13), a tension spring (15) is sleeved on the splicing rod (13), and one end of the tension spring (15) is connected with the flange (14), the other end of the tension spring (15) is connected with the extension block (101).

6. The mounting structure for a composite large-diameter drain pipeline according to claim 5, wherein: extend and be equipped with support piece (16) that the one end that is used for keeping away from flange (14) with spliced pole (13) on piece (101) keeps in spliced eye (11), support piece (16) are including dwang (161) and rotation plectrum (162), dwang (161) fixed connection is on extending piece (101), rotation plectrum (162) rotate to connect and set up the one end of keeping away from extending piece (101) at dwang (161), the lateral wall that the dwang (161) was kept away from in rotation plectrum (162) is close to the lateral wall butt of grafting with flange (14).

7. The mounting structure for a composite large-diameter drain pipeline according to claim 1, wherein: and a water stop pad (17) is arranged between the bosses (3) on the opposite cross sections of the two adjacent PE pipes (1).

8. The mounting structure for a composite large-diameter drain pipeline according to claim 2, wherein: and a hanging ring (18) is arranged on the side wall of the upper plate (41) far away from the PE pipe (1).

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