CN112524360A

CN112524360A - Drainage pipeline with double-seal structure

Info

Publication number: CN112524360A
Application number: CN202011598705.XA
Authority: CN
Inventors: 曹开龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-03-19

Abstract

The invention relates to the field of drainage pipeline connecting structures, in particular to a drainage pipeline with a double-sealing structure. Can connect two pipelines through the connecting pipe that sets up, first pipeline and second pipeline are equallyd divide and are do not the screw thread cup joint the both ends at the connecting pipe, be convenient for the connecting pipe to be connected with the pipe, and the thickness of two sections pipe junction can be strengthened to connecting pipe and pipe threaded connection, can make the interior water pressure of pipeline can not cause the problem of leaking when too big, through the interior bushing pipe that sets up, can be so that water is more smooth and easy when the junction between two sections pipes of flow through, rivers can not cause the erosive wear to the junction between two sections pipes, and the multiple sealing washer that sets up between two sections pipes and the connecting pipe can make the sealed better between pipe and the connecting pipe.

Description

Drainage pipeline with double-seal structure

Technical Field

The invention relates to the field of drainage pipeline connecting structures, in particular to a drainage pipeline with a double-sealing structure.

Background

The drainage pipe refers to a system consisting of a pipe channel for collecting and discharging sewage, wastewater and rainwater and accessory facilities thereof. Including main pipes, branch pipes and pipes leading to the treatment plant, whether built on streets or anywhere else, as long as the pipes are functioning as drains, should be counted as drains. When the drainage pipeline drains water, because the length of the pipeline is not enough, two sections of pipelines need to be connected.

The current connection structure for pipeline is single when connecting two sections pipelines and is connected through two ring flanges and a plurality of screw mostly, uses the back when the pipeline for a long time, and its leakproofness of joint seal department will reduce by a wide margin, can make the water in the pipeline spill by the junction to it is only to connect through the ring flange, can make the junction take place to leak when the water pressure of pipeline is too big the same.

Disclosure of Invention

The invention provides a drainage pipeline with a double sealing structure, aiming at the problems that the existing connecting structure for pipelines is mostly connected through two flanges and a plurality of screws singly when two pipelines are connected, when the pipelines are used for a long time, the sealing performance of the connecting sealing position of the pipelines is greatly reduced, water in the pipelines can leak from the connecting position, the pipelines are only connected through the flanges, and when the water pressure of the pipelines is too high, the water leakage of the connecting position can be caused.

The technical scheme adopted by the invention for solving the technical problems is as follows: a drainage pipeline with a double-sealing structure comprises a sealing assembly, an inner locking assembly, a driving assembly and an outer reinforcing assembly, wherein the inner locking assembly is arranged inside the sealing assembly, and the driving assembly and the outer reinforcing assembly are both arranged on the outer side wall of the sealing assembly; the sealing assembly comprises a connecting pipe, a first pipeline and a second pipeline are respectively arranged at two ends of the connecting pipe, external thread connecting grooves are respectively arranged on the outer pipe wall of the two ends of the connecting pipe, internal thread connecting grooves are respectively arranged on the inner pipe walls of the first pipeline and the second pipeline close to one end of the connecting pipe and correspond to the external thread connecting grooves, the first pipeline and the second pipeline are respectively in threaded connection with the external thread connecting grooves at the two ends of the connecting pipe through the internal thread connecting grooves, lining pipes are fixedly connected to one ends of the connecting pipe inserted into the first pipeline and one ends of the second pipeline close to one ends of the lining pipes, first sealing grooves are respectively arranged on the inner pipe walls of the first pipeline and the second pipeline close to one ends of the lining pipes, first sealing rings are embedded into the first sealing grooves, the first sealing rings are sleeved on the outer pipe wall of the lining pipes, and second sealing grooves are respectively arranged at one ends of, the inside of second seal groove has inlayed and has connect the second sealing washer, the second sealing washer cup joints on the outer pipe wall of connecting pipe.

Specifically, the internal lock subassembly includes first recess and kicking block, first recess is seted up on the outer pipe wall at connecting pipe both ends, the second recess has been seted up to the position that the interior bottom of first recess corresponds the kicking block, kicking block sliding connection has in the inside of second recess, the first spring of one end fixedly connected with of kicking block, the other end of first spring and the inner wall fixed connection of second recess, the top that first spring one end was kept away from to the kicking block is provided with the locking piece, the third recess has been seted up to the corresponding locking piece in the interior top of second recess, locking block sliding connection corresponds in the inside of third recess, and all corresponds on the inner wall of first pipeline and second pipeline the locked groove of looks adaptation is seted up to the position of locking block, the kicking block is close to the top fixedly connected with Z type of first spring one end and dials the piece, the Z type is dialled the piece and is passed first recess, all correspond the Z type on the outer wall of connecting pipe and first pipeline and second pipeline and dial the piece and pass first recess The fourth recess of looks adaptation is seted up to the one end in groove, Z type is dialled movable block sliding connection and is being in the inside of first recess and fourth recess.

Specifically, the driving assembly comprises a plurality of pressing blocks, the pressing blocks are arranged around the connecting pipe at equal intervals, one end of each pressing block, which is close to the connecting pipe, is fixedly connected with a limiting rod, a fifth groove matched with the limiting rod is formed in the outer pipe wall of the connecting pipe, one end, which is far away from the pressing blocks, of each limiting rod is inserted into the corresponding fifth groove in a sliding mode, a third spring is sleeved on the rod wall, which is located between the pressing blocks and the connecting pipe, of each limiting rod, two ends of the third spring are respectively and fixedly connected with the pressing blocks and the connecting pipe, sixth grooves are formed in two sides, which are close to one end of the connecting pipe, of each pressing block, a push rod is hinged in the corresponding sixth groove through a first pin shaft, one end, which is far away from the pressing blocks, of each push rod is provided with a sliding sleeve, the sliding sleeves are slidably sleeved, and one end of the push rod, which is far away from the first pin shaft, is hinged inside the seventh groove through a second pin shaft.

Specifically, the outer reinforcing component comprises a first fixing ring and a second fixing ring, the first fixing ring and the second fixing ring are respectively and fixedly connected to the outer pipe wall of one end, close to the connecting pipe, of the first pipeline and the second pipeline, the side walls of the excircle sides of the first fixing ring and the second fixing ring are respectively provided with a plurality of eighth grooves and ninth grooves at equal intervals, the inner part of the eighth groove on the first fixing ring is articulated with an articulated block through a third pin shaft, one end of the articulated block close to the second fixing ring is fixedly connected with a screw rod, a pinion ring is sleeved on the rod wall of one end of the screw rod, which passes through the ninth groove, in a threaded manner, a rotating sleeve is rotatably sleeved on the outer pipe wall of one end of the second pipeline, which is close to the second fixing ring, the outer cylinder wall of the rotating sleeve close to one end of the second fixing ring is fixedly sleeved with a large gear ring, and the large gear ring is meshed and connected with the small gear ring.

Specifically, go up fixedly connected with limit slide on the outer wall of locking piece one side, just correspond limit slide and seted up spacing spout on the inner wall of third recess, limit slide sliding connection is in the inside of spacing spout, just limit slide's bottom fixedly connected with second spring, the other end of second spring and the interior diapire fixed connection of spacing spout.

Specifically, a poke rod is fixedly connected to the outer cylinder wall at one end, far away from the large gear ring, of the rotating sleeve.

The invention has the beneficial effects that:

(1) according to the drainage pipeline with the double-sealing structure, the two pipelines can be connected through the arranged connecting pipe, the first pipeline and the second pipeline are respectively sleeved at the two ends of the connecting pipe in a threaded manner, so that the connecting pipe is conveniently connected with the guide pipe, the thickness of the joint of the two guide pipes can be increased due to the threaded connection of the connecting pipe and the guide pipe, and the problem of water leakage cannot be caused when the water pressure in the pipelines is too high.

(2) According to the drainage pipeline with the double-sealing structure, the inner lining pipe is arranged, so that water can flow through the joint between the two sections of guide pipes more smoothly, the water flow cannot cause scouring wear to the joint between the two sections of guide pipes, and the multiple sealing rings arranged between the two sections of guide pipes and the connecting pipe can enable the guide pipes and the connecting pipe to be better sealed.

(3) According to the drainage pipeline with the double-sealing structure, due to the arrangement of the inner locking assembly, the outer reinforcing assembly and the driving assembly, when the outer reinforcing assembly reinforces the connection between the two sections of pipelines, the screw rod can push the pressing block to move towards the connecting pipe, the pressing block can drive the sliding sleeve to move towards the two ends of the connecting pipe through the push rod when moving, the sliding sleeve can drive the ejector block to slide through the Z-shaped stirring block when sliding, and the ejector block can push the locking block to be inserted into the locking groove when sliding, so that the connection between the two sections of pipelines and the connecting pipe can be firmer.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a drainage pipeline with a double sealing structure provided by the invention;

FIG. 2 is a sectional view taken in the direction A-A of FIG. 1 of a drainpipe with a double sealing structure according to the present invention;

FIG. 3 is an enlarged view of a portion B of FIG. 1 illustrating a drain pipe with a double sealing structure according to the present invention;

FIG. 4 is an enlarged view of a portion C of FIG. 1 of a drainpipe with a double seal according to the present invention;

FIG. 5 is a schematic structural view of a sliding sleeve in a drainpipe with a double sealing structure according to the present invention;

FIG. 6 is a schematic structural view of a first fixing ring in a drainpipe with a double-sealing structure according to the present invention;

FIG. 7 is a schematic structural diagram of a rotating sleeve in a drain pipe with a double sealing structure according to the present invention.

In the figure: 1. a seal assembly; 11. a connecting pipe; 12. a first conduit; 13. a second conduit; 14. an external thread connecting groove; 15. an internal thread connecting groove; 16. a liner tube; 17. a first seal groove; 18. a first seal ring; 19. a second seal groove; 110. a second seal ring; 2. an inner lock assembly; 21. a first groove; 22. a top block; 23. a second groove; 24. a first spring; 25. a locking block; 26. a third groove; 27. locking the groove; 28. a limiting slide block; 29. a limiting chute; 210. a second spring; 211. a Z-shaped toggle block; 212. a fourth groove; 3. a drive assembly; 31. briquetting; 32. a limiting rod; 33. a fifth groove; 34. a third spring; 35. a sixth groove; 36. a first pin shaft; 37. a push rod; 38. a sliding sleeve; 39. a seventh groove; 310. a second pin shaft; 4. an outer reinforcement assembly; 41. a first retaining ring; 42. an eighth groove; 43. a third pin shaft; 44. a hinged block; 45. a screw rod; 46. a second retaining ring; 47. a ninth groove; 48. a pinion ring; 49. rotating the sleeve; 410. a poke rod; 411. a large gear ring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-7, the drainpipe with the double-sealing structure according to the present invention comprises a sealing assembly 1, an internal locking assembly 2, a driving assembly 3 and an external reinforcing assembly 4, wherein the internal locking assembly 2 is arranged inside the sealing assembly 1, and the driving assembly 3 and the external reinforcing assembly 4 are both arranged on the outer side wall of the sealing assembly 1; the sealing assembly 1 comprises a connecting pipe 11, a first pipeline 12 and a second pipeline 13 are respectively arranged at two ends of the connecting pipe 11, external thread connecting grooves 14 are respectively arranged on the outer pipe wall of the two ends of the connecting pipe 11, internal thread connecting grooves 15 are respectively arranged on the inner pipe walls of the first pipeline 12 and the second pipeline 13 close to one end of the connecting pipe 11 and corresponding to the external thread connecting grooves 14, the first pipeline 12 and the second pipeline 13 are both in threaded connection with the external thread connecting grooves 14 at two ends of the connecting pipe 11 through the internal thread connecting grooves 15, an inner lining pipe 16 is fixedly connected at one end of the connecting pipe 11 inserted into the first pipeline 12 and one end of the second pipeline 13, first sealing grooves 17 are respectively arranged on the inner pipe walls of the first pipeline 12 and the second pipeline 13 close to one end of the inner lining pipe 16, first sealing rings 18 are embedded into the first sealing grooves 17, and the first sealing rings 18 are sleeved on the outer pipe wall of the inner lining pipe 16, the first pipeline 12 and the second pipeline 13 are close to one end of the connecting pipe 11 and are both provided with a second sealing groove 19, a second sealing ring 110 is embedded in the second sealing groove 19, and the second sealing ring 110 is sleeved on the outer pipe wall of the connecting pipe 11.

Specifically, the inner lock assembly 2 includes a first groove 21 and a top block 22, the first groove 21 is disposed on the outer pipe wall at two ends of the connecting pipe 11, a second groove 23 is disposed at a position corresponding to the top block 22 at the inner bottom of the first groove 21, the top block 22 is slidably connected inside the second groove 23, one end of the top block 22 is fixedly connected with a first spring 24, the other end of the first spring 24 is fixedly connected with the inner wall of the second groove 23, a lock block 25 is disposed above the end of the top block 22 far away from the first spring 24, a third groove 26 is disposed at the inner top of the second groove 23 corresponding to the lock block 25, the lock block 25 is slidably connected inside the third groove 26, a lock groove 27 matched with the lock block 25 is disposed at a position corresponding to the inner wall of the first pipe 12 and the second pipe 13, a Z-shaped toggle block 211 is fixedly connected to the top of the top block 22 near one end of the first spring 24, z type is dialled movable block 211 and is passed first recess 21, all set up the fourth recess 212 of looks adaptation corresponding Z type and is dialled movable block 211 on the outer wall of connecting pipe 11 and first pipeline 12 and second pipeline 13 and pass the one end of first recess 21, Z type is dialled movable block 211 sliding connection and is equipped with the inside of first recess 21 and fourth recess 212.

Specifically, the driving assembly 3 includes a plurality of pressing blocks 31, the plurality of pressing blocks 31 are disposed around the connecting pipe 11 at equal intervals, one end of the pressing block 31 close to the connecting pipe 11 is fixedly connected with a limiting rod 32, a fifth groove 33 corresponding to the limiting rod 32 is formed on the outer wall of the connecting pipe 11, one end of the limiting rod 32 far from the pressing block 31 is slidably inserted into the fifth groove 33, the limiting rod 32 is located between the pressing block 31 and the connecting pipe 11, a third spring 34 is sleeved on the rod wall, two ends of the third spring 34 are respectively fixedly connected with the pressing block 31 and the connecting pipe 11, both sides of one end of the pressing block 31 close to the connecting pipe 11 are respectively provided with a sixth groove 35, the inside of the sixth groove 35 is hinged with a push rod 37 through a first pin shaft 36, one end of the push rod 37 far from the pressing block 31 is provided with a sliding sleeve 38, the sliding sleeve 38 is slidably sleeved on the outer wall of the, one end of the sliding sleeve 38 close to the push rod 37 is provided with a plurality of seventh grooves 39 corresponding to the push rod 37, and one end of the push rod 37 far from the first pin shaft 36 is hinged inside the seventh grooves 39 through a second pin shaft 310.

Specifically, the outer reinforcement assembly 4 includes a first fixing ring 41 and a second fixing ring 46, the first fixing ring 41 and the second fixing ring 46 are respectively and fixedly connected to the outer pipe wall of the first pipe 12 and the second pipe 13 near one end of the connecting pipe 11, the outer side walls of the outer circles of the first fixing ring 41 and the second fixing ring 46 are respectively and equally spaced and provided with a plurality of eighth grooves 42 and ninth grooves 47, the inside of the eighth groove 42 on the first fixing ring 41 is hinged with a hinge block 44 through a third pin 43, one end of the hinge block 44 near the second fixing ring 46 is fixedly connected with a screw rod 45, the screw rod 45 penetrates through the rod wall at one end of the ninth groove 47 and is in threaded sleeve connection with a pinion ring 48, the outer pipe wall of the second pipe 13 near one end of the second fixing ring 46 is rotatably sleeved with a rotating sleeve 49, the outer pipe wall of the rotating sleeve 49 near one end of the second fixing ring 46 is fixedly sleeved with a large gear ring 411, the large gear ring 411 is in meshing connection with the small gear ring 48.

Specifically, fixedly connected with limiting slide block 28 on the outer wall of locking piece 25 one side, just limiting sliding groove 29 has been seted up to corresponding limiting slide block 28 on the inner wall of third recess 26, limiting slide block 28 sliding connection is in limiting sliding groove 29's inside, just limiting slide block 28's bottom fixedly connected with second spring 210, the other end of second spring 210 and limiting sliding groove 29's interior diapire fixed connection, limiting slide block 28 can make locking piece 25 more stable when the inside of third recess 26 slides when limiting sliding groove 29's inside slides, and second spring 210's pulling force can make locking piece 25 be located third recess 26 inside when initial condition, can prevent that locking piece 25 from causing the hindrance to being connected between first pipeline 12 and second pipeline 13 and connecting pipe 11.

Specifically, the poke rod 410 is fixedly connected to the outer cylinder wall of the end, away from the large gear ring 411, of the rotating sleeve 49, and the poke rod 410 can enable the rotating sleeve 49 to be more convenient and labor-saving in rotation.

When in use, the first pipeline 12 and the second pipeline 13 are sleeved at two ends of the connecting pipe 11 in a threaded manner, the thickness of the joint of the connecting pipe 11 and the connecting pipe 11 can be increased by the lining pipe 16 at the two ends of the connecting pipe 11, so that the problem of water leakage can not be caused when the water pressure in the pipe is too high, the lining pipe 16 can make water flow more smoothly through the joint between two sections of pipes, the water flow can not cause scouring wear to the joint between the two sections of pipes, meanwhile, the first sealing ring 18 and the second sealing ring 110 arranged between the first pipeline 12 and the second pipeline 13 and the connecting pipe 11 can make the sealing between the first pipeline 12 and the second pipeline 13 and the connecting pipe 11 better, the screw rod 45 is rotated by taking the third pin shaft 43 as an axis, so that one end of the screw rod 45 far away from the hinge block 44 passes through the ninth groove 47, and the small gear ring 48 is meshed with the large gear ring 411, the rotating sleeve 49 is driven to rotate by the poke rod 410, the rotating sleeve 49 can drive the large gear ring 411 to rotate when rotating, the large gear ring 411 can synchronously drive a plurality of small gear rings 48 meshed with the large gear ring 411 to rotate simultaneously when rotating, the small gear rings 48 can reinforce the connection between the two fixing rings when rotating, thereby can strengthen the connection between first pipeline 12 and the second pipeline 13, lead screw 45 can promote briquetting 31 and remove towards connecting pipe 11 when the upset, briquetting 31 can drive sliding sleeve 38 and remove towards the both ends of connecting pipe 11 through push rod 37 when removing, sliding sleeve 38 can drive kicking block 22 through Z type stirring piece 211 when sliding and slide, kicking block 22 can promote the inside of locking piece 25 grafting at locked groove 27 when sliding, can make that be connected between two sections pipes and connecting pipe 11 more firm.

The invention has the beneficial effects that:

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The drainage pipeline with the double-sealing structure is characterized by comprising a sealing assembly (1), an inner locking assembly (2), a driving assembly (3) and an outer reinforcing assembly (4), wherein the inner locking assembly (2) is arranged inside the sealing assembly (1), and the driving assembly (3) and the outer reinforcing assembly (4) are both arranged on the outer side wall of the sealing assembly (1); the sealing assembly (1) comprises a connecting pipe (11), a first pipeline (12) and a second pipeline (13) are respectively arranged at two ends of the connecting pipe (11), external thread connecting grooves (14) are respectively formed in outer pipe walls at two ends of the connecting pipe (11), internal thread connecting grooves (15) are respectively formed in inner pipe walls of the first pipeline (12) and the second pipeline (13) close to one end of the connecting pipe (11) and correspond to the external thread connecting grooves (14), the first pipeline (12) and the second pipeline (13) are respectively in threaded connection with the external thread connecting grooves (14) at two ends of the connecting pipe (11) through the internal thread connecting grooves (15), a lining pipe (16) is fixedly connected to one end of the connecting pipe (11) inserted into the first pipeline (12) and one end of the second pipeline (13), and first sealing grooves (17) are respectively formed in inner pipe walls of the first pipeline (12) and the second pipeline (13) close to one end of the lining pipe (16), the inside of first seal groove (17) has inlayed first sealing washer (18), first sealing washer (18) cup joint on the outer pipe wall of interior bushing pipe (16), second seal groove (19) have all been seted up to the one end that first pipeline (12) and second pipeline (13) are close to connecting pipe (11), the inside of second seal groove (19) has inlayed second sealing washer (110), second sealing washer (110) cup joint on the outer pipe wall of connecting pipe (11).

2. The drainpipe with the double sealing structure as claimed in claim 1, wherein: interior lock subassembly (2) include first recess (21) and kicking block (22), first recess (21) are seted up on the outer pipe wall at connecting pipe (11) both ends, second recess (23) have been seted up to the position that the interior bottom of first recess (21) corresponds kicking block (22), kicking block (22) sliding connection is in the inside of second recess (23), the first spring (24) of one end fixedly connected with of kicking block (22), the other end of first spring (24) and the inner wall fixed connection of second recess (23), the top that first spring (24) one end was kept away from in kicking block (22) is provided with locking piece (25), third recess (26) have been seted up to the interior top of second recess (23) corresponding locking piece (25), locking piece (25) sliding connection is in the inside of third recess (26), and all correspond on the inner wall of first pipeline (12) and second pipeline (13) the locked groove (27) of looks adaptation are seted up to the position of locking piece (25) The utility model discloses a top fixed connection has Z type to dial piece (211) that kicking block (22) are close to first spring (24) one end, first recess (21) are passed in Z type dial piece (211), fourth recess (212) of looks adaptation are seted up to the one end that all corresponds Z type dial piece (211) and pass first recess (21) on the outer wall of connecting pipe (11) and first pipeline (12) and second pipeline (13), Z type dial piece (211) sliding connection is in the inside of first recess (21) and fourth recess (212).

3. The drainpipe with the double sealing structure as claimed in claim 1, wherein: the driving assembly (3) comprises a plurality of pressing blocks (31), the pressing blocks (31) are arranged around the connecting pipe (11) at equal intervals, one end, close to the connecting pipe (11), of each pressing block (31) is fixedly connected with a limiting rod (32), a fifth groove (33) matched with the limiting rod (32) is formed in the outer pipe wall of the connecting pipe (11) in a matched mode, one end, far away from the pressing blocks (31), of each limiting rod (32) is inserted into the corresponding fifth groove (33) in a sliding mode, the limiting rods (32) are located between the pressing blocks (31) and the connecting pipe (11) and are sleeved with third springs (34), two ends of each third spring (34) are fixedly connected with the corresponding pressing block (31) and the corresponding connecting pipe (11) respectively, both sides, close to one end of the connecting pipe (11), of each pressing block (31) are provided with sixth grooves (35), push rods (37) are hinged to the insides of the sixth grooves (35) through first hinge pins (36, one end of the push rod (37) far away from the pressing block (31) is provided with a sliding sleeve (38), the sliding sleeve (38) is sleeved on the outer pipe wall of the connecting pipe (11) in a sliding mode, one end, close to the push rod (37), of the sliding sleeve (38) corresponds to the push rod (37) and is provided with a plurality of seventh grooves (39), and one end, far away from the first pin shaft (36), of the push rod (37) is hinged inside the seventh grooves (39) through a second pin shaft (310).

4. The drainpipe with the double sealing structure as claimed in claim 1, wherein: the outer reinforcement component (4) comprises a first fixing ring (41) and a second fixing ring (46), the first fixing ring (41) and the second fixing ring (46) are respectively fixedly connected to the outer pipe wall of one end, close to the connecting pipe (11), of a first pipeline (12) and a second pipeline (13), a plurality of eighth grooves (42) and ninth grooves (47) are respectively and equidistantly formed in the side wall of the excircle side of the first fixing ring (41) and the second fixing ring (46), the inside of the eighth groove (42) in the first fixing ring (41) is hinged to a hinged block (44) through a third pin shaft (43), the hinged block (44) is close to one end of the second fixing ring (46) and is fixedly connected with a lead screw (45), the lead screw (45) penetrates through a rod wall at one end of the ninth groove (47) and is sleeved with a small gear ring (48) in a threaded manner, the outer pipe wall, close to one end of the second fixing ring (46), of the second pipeline (13) is rotatably sleeved with a rotating sleeve (49), the outer cylinder wall of one end, close to the second fixing ring (46), of the rotating sleeve (49) is fixedly sleeved with a large gear ring (411), and the large gear ring (411) is in meshed connection with the small gear ring (48).

5. The drainpipe with the double sealing structure as claimed in claim 2, wherein: go up fixedly connected with limit slide (28) on the outer wall of locking piece (25) one side, just limit chute (29) have been seted up corresponding limit slide (28) on the inner wall of third recess (26), limit slide (28) sliding connection is in the inside of limit chute (29), just the bottom fixedly connected with second spring (210) of limit slide (28), the other end of second spring (210) and the interior diapire fixed connection of limit chute (29).

6. The drainpipe with the double sealing structure as claimed in claim 4, wherein: a poke rod (410) is fixedly connected to the outer cylinder wall at one end of the rotating sleeve (49) far away from the large gear ring (411).