CN215568666U

CN215568666U - Pre-buried formula drain pipe fitting

Info

Publication number: CN215568666U
Application number: CN202023202554.XU
Authority: CN
Inventors: 林国强; 邱寿华
Original assignee: KUNMING QUNZHIYING TECHNOLOGY CO LTD
Current assignee: KUNMING QUNZHIYING TECHNOLOGY CO LTD
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-01-18
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a pre-embedded type drainage pipe fitting, and mainly aims to solve the problems that when the existing pre-embedded type flange interface drainage pipe fitting is pre-embedded, holes need to be formed in a template in advance, so that the template is difficult to recycle, the workload is increased, or flange bolts are reserved in bolt holes in advance, so that the flange bolts are easy to rust, and the pipeline is difficult to install and disassemble. The technical scheme is as follows: the sealing device is composed of an upper interface and a lower interface which are flange bellmouths, bolt connecting holes with planes opened outwards are arranged on the outer walls of the bellmouths, the width of the plane opening of each bolt connecting hole is smaller than the length of the bolt connecting hole, the bolt connecting holes are vertically divided into two layers, a sealing plate is arranged on the layer adjacent to concrete, a bolt fixing head extends into the bolt connecting holes from the narrower layer and then rotates a bolt to enable the fixing head to be clamped on the wider layer, a rubber ring and a flange gland are sleeved into a pipeline, and a tightening nut extrudes the rubber ring to form sealing connection. The utility model can realize the direct pre-embedding of the drain pipe fitting of the flange interface, the template does not need to be provided with holes, bolts or threads do not need to be reserved in advance, and the pipeline is convenient and quick to install and disassemble.

Description

Pre-buried formula drain pipe fitting

Technical Field

The utility model relates to a building drainage pipe fitting, in particular to a building pre-embedded drainage pipe fitting.

Background

When drainage pipe fittings are embedded in a traditional building, in order to facilitate the sealing connection of drainage pipes below, interfaces below the drainage pipe fittings are exposed out of a floor slab of a ground structure, holes need to be formed in a template for supporting the concrete pouring of the floor slab before embedding, the lower interfaces of products extend into the lower sides of the holes, after the products are fixed, the concrete is poured, the structure of the template needs to be damaged, the template cannot be applied to places without ground holes, and the workload is increased; and the product of the pre-buried installation mode of flange that need not template trompil hole on the market all needs pre-buried connecting thread in the product, and the flange gland below the sealed below can't be connected because of rustting to the screw thread easily, and can't demolish, change the drainage pipe of below connection after the screw thread rusts, not only installation effectiveness reduces from this, and overhauls, changes the drainage riser very difficult.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a pre-buried drainage pipe fitting which is used in a building, can pre-embed a product in a building structure floor slab, does not need to open a hole in a template for supporting the concrete pouring of the building structure floor slab, and can quickly install, remove and replace a drainage vertical pipe after pre-burying, so that the maintenance and overhaul of the drainage vertical pipe become very easy.

The pre-buried drainage pipe fitting comprises an upper connector and a lower connector. The lower connector is a first flange bell mouth, first bolt connecting holes with planes opened outwards are arranged on the outer wall of the lower end of the first flange bell mouth, the horizontal openings of at least one pair of the first bolt connecting holes face opposite directions, the vertical direction of the plane openings of at least 3 first bolt connecting holes is a two-layer structure with different opening widths, and the vertical first bottom layer width is smaller than the first upper layer width; there is rubber seal in the first flange bell mouth, and there is first flange gland rubber seal lower extreme, has bolt housing hole on the first flange gland, has first bolted connection hole of bolted connection and bolt housing hole, and the fixed head length of bolt is greater than the width, and in the first upper strata of first bolted connection hole, the nut of bolt is on the lower wall of bolt housing hole on first flange gland, goes up the below of interface, has to the convex bearing platform of inner wall on the top inner wall of lower interface.

The upper end of the first flange gland of the pre-buried drainage pipe fitting is provided with an upward convex correction head; the outer wall of the correcting head is smaller than the inner wall of the first flange bell mouth, the top of the correcting head is shorter than the bottom of the bearing platform at the top of the first flange bell mouth, and the rubber sealing ring is sleeved on the outer wall of the correcting head; the lower end of the first flange gland is provided with a quick-connection bell mouth, the outer wall of the quick-connection bell mouth is provided with a second bolt connection hole protruding out of the outer wall, the distance between the lower wall of a bolt sleeve hole on the first flange gland and the upper wall of the second bolt connection hole is more than 10mm, the inner wall of the quick-connection bell mouth is more than the outer wall of the correction head, the depth of the bell mouth is more than 40mm, and the depth exceeds the height of two rubber sealing rings; the lower end of the quick-connection socket is provided with a second flange pressing cover, the second flange pressing cover is provided with a bolt sleeve hole, rubber sealing rings are arranged above the second flange pressing cover and below a second bolt connection hole, a bolt is connected with the second bolt connection hole and the second flange pressing cover, and the length of a fixing head of the bolt is larger than the width.

The depth of the first flange bell mouth of the pre-buried type drainage pipe fitting is larger than 40mm, and the height of the first flange bell mouth exceeds the height of the two rubber sealing rings.

The upper connector of the pre-buried type drainage pipe fitting is a second flange socket, a rubber sealing ring is arranged in the socket, 3 third bolt connecting holes are formed in the socket, the horizontal openings of the bolt connecting holes are outward, the horizontal openings of a pair of third bolt connecting holes face opposite directions, the vertical direction of the plane opening of each third bolt connecting hole is of a two-layer structure with different widths, the width of the vertical second bottom layer is larger than that of the second upper layer, a sealing plate is arranged at the bottom of each third bolt connecting hole, a third flange pressing cover is arranged above the rubber sealing ring, a flange hole is formed in each third flange pressing cover, bolts are connected with the third flange pressing cover and the 3 third bolt connecting holes in the flange socket, fixing heads of the bolts are arranged in the second bottom layer above the sealing plate and below the second upper layer, nuts of the bolts are arranged above the third flange pressing covers, the length of the fixing heads of the bolts is larger than the width, and the depth of the first flange socket is larger than that of the second flange socket, and the depth of the first flange bell mouth exceeds the height of the two rubber sealing rings.

The pre-buried formula drain pipe spare on the interface be the flange bellmouth, there is rubber seal in the bellmouth, all have 3 third bolted connection holes on the flange bellmouth, the degree of depth of first flange bellmouth is greater than the degree of depth of second flange bellmouth, and the degree of depth of first flange bellmouth exceeds the height of two rubber seal.

When the pre-buried type drainage pipe fitting is applied to a building, when no sealing plate is arranged above the first bolt connecting hole of the first flange bellmouth, the first bolt connecting hole of the first flange bellmouth of the lower connector is blocked by measures such as rubber or foaming materials, the first bolt connecting hole is fixed above a template at the position where a vertical pipe is to be installed, the template does not need to be provided with a hole, after concrete of a floor slab is poured, a blocking object in the first bolt connecting hole can be pulled out and removed from the lower part, because the vertical direction of a plane opening of the first bolt connecting hole is a two-layer structure with different opening widths, the vertical width of a first bottom layer is smaller than the width of a first upper layer, the length of a fixing head of a bolt is larger than the width, the length of the fixing head of the bolt can be upwards inserted from a hole with the length of the first bottom layer of the first bolt connecting hole, a screw rod below the bolt is rotated, the length of the fixing head of the bolt can be clamped on a step with the width of the first upper layer of the first bolt connecting hole larger than the width of the first bottom layer, the drainage pipe that will be sealing connection below the lower interface sheathes in first flange gland and rubber seal, insert the pipeline in the inner wall of first flange bellmouth, the screw rod cover of bolt is in the bolt cover hole on first flange gland, screw up the drainage riser of nut connection and sealed below first flange gland, because there is the first bolted connection hole that the plane outwards opened on the outer wall of first flange bellmouth lower extreme, the horizontal opening orientation of at least a pair of first bolted connection hole is opposite, the drawing of patterns is convenient for when the product is produced, need not to drill on the product, save the process, and the production efficiency is improved, the vertical two-layer structure that is the opening width difference of the plane open-ended of 3 first bolted connection holes, vertical first bottom width is less than first upper width, the fixed head length of bolt is greater than the width, then be convenient for the fixed of the fixed head of bolt and demolish. The bearing platforms which are protruded towards the inner wall are arranged on the inner walls below the upper connector and above the lower connector and can support the drainage vertical pipe above or the pipe fittings connected with the drainage vertical pipe, and the upper connector is a stainless steel hoop rubber seal upper drainage vertical pipe or an upper drainage vertical pipe in other modes.

The upper end of the first flange gland is provided with an upward convex correction head; the outer wall of the correcting head is smaller than the inner wall of the first flange bell mouth, the top of the correcting head is shorter than the bottom of the bearing platform at the top of the first flange bell mouth and is higher than the thickness of the rubber sealing ring, and the rubber sealing ring is sleeved on the outer wall of the correcting head; the lower end of the first flange gland is provided with a quick-connection bell mouth, the outer wall of the quick-connection bell mouth is provided with a second bolt connecting hole protruding out of the outer wall, the distance between the lower wall surface a of a bolt sleeve hole on the first flange gland and the upper wall surface b of the second bolt connecting hole is more than 10mm, the inner wall of the quick-connection bell mouth is more than the outer wall of the correction head, the depth of the quick-connection bell mouth is more than 40mm, and the depth of the quick-connection bell mouth exceeds the height of two rubber sealing rings; the lower end of the quick-connection bell mouth is provided with a second flange gland, the second flange gland is provided with a bolt sleeve hole, rubber sealing rings are arranged above the second flange gland and below a second bolt connecting hole, the second bolt connecting hole is connected with the second flange gland through bolts, and the length of a fixing head of each bolt is larger than the width of the fixing head of each bolt; the outer wall of the correcting head is smaller than the inner wall of the first flange bell mouth, the correcting head can be inserted into the first flange bell mouth, the top of the correcting head is shorter than the bottom of a bearing platform at the top of the first flange bell mouth and is higher than the thickness of the rubber sealing ring, the rubber sealing ring is sleeved on the outer wall of the correcting head, after the correcting head is inserted into the first flange bell mouth, the first flange gland integrated with the quick-connection bell mouth can be corrected and sealed with the first flange bell mouth only by screwing a nut below a lower wall surface a of a bolt sleeve hole on the first flange gland, the top of the correcting head higher than the thickness of the rubber sealing ring forms limiting correction with the inner wall of the first flange bell mouth, so that the first flange gland integrated with the quick-connection bell mouth cannot generate displacement, the connected drainage vertical pipe and the upper and lower connecting ports of the bearing platform are smooth, and drainage flowing upwards and downwards cannot block a ventilation channel at the center of the vertical pipe due to dislocation, thereby providing the drainage flow of the vertical pipe and the transverse branch pipe, preventing the rubber sealing ring from sealing the correcting head because the top of the correcting head is shorter than the bottom of the bearing platform at the top of the first flange bell mouth, because the depth of the quick-connection socket is more than 40mm and exceeds the height of the two rubber sealing rings, when the vertical drainage pipe is installed, the vertical drainage pipe can be lifted upwards, after the lower end of the vertical pipe has the condition of being hermetically connected with the lower part, the stand pipe is lowered, the lower end of the stand pipe is connected with the lower pipeline in a sealing way, the nut below the first flange gland is screwed, the lower drainage stand pipe can be connected and sealed, and under the condition that the house height is set, can realize that arbitrary layer begins quick installation and quick dismantlement between the different floors, the distance of wall b is greater than 25mm on the lower wall a of the bolt trepanning on the first flange gland apart from second bolt connection hole, the placing of the bolt of being convenient for and the tightening of nut.

Because the degree of depth of first flange bellmouth is greater than 40mm, and highly surpasss two rubber seal ring's height, can lift the drainage riser earlier when the drainage riser is installed, after the lower extreme of riser can possess the condition with below sealing connection, transfer the riser, let the lower extreme of riser and the sealed connection of below pipeline after good, screw up the nut of first flange gland below, just can connect and seal the drainage riser of below. Only under the condition that the depth of the first flange bellmouth is enough, when the lower end vertical pipe is connected and sealed, the rubber sealing rings above the first flange bellmouth can be in sealing connection with the upper end of the drainage vertical pipe under the action that the nuts extrude the first flange gland and the lower end of the first flange bellmouth, the depth of the first flange bellmouth is larger than 40mm, and the height of the first flange bellmouth exceeds the height of the two rubber sealing rings, so that the lowest requirement of normal sealing connection can be met.

Because the upper interface is a second flange bellmouth, a rubber sealing ring is arranged in the bellmouth, 3 third bolt connecting holes are arranged on the bellmouth, the horizontal openings of the third bolt connecting holes are outward, the horizontal openings of a pair of third bolt connecting holes are opposite in direction, the vertical direction of the plane openings of the three holes is a two-layer structure with different opening widths, the width of a vertical second bottom layer is larger than that of a second upper layer, the bottom of the third bolt connecting hole is provided with a sealing plate, a third flange pressing cover is arranged above the rubber sealing ring, a flange hole is arranged on the third flange pressing cover, the third flange pressing cover is connected with the 3 third bolt connecting holes on the flange bellmouth through bolts, the fixing head of each bolt is arranged in the second bottom layer above the sealing plate and below the second upper layer of the third bolt connecting hole of the flange bellmouth, the nut of each bolt is arranged above the third flange pressing cover, and the interface structure is the same as the first flange bellmouth structure of the lower bellmouth, the using method is the same, the whole height of the product can only reach the same thickness of the floor concrete of the ground structure, so that the product is not easy to damage in demolding, the product protection process is reduced, the cost of the product can be reduced, the bottom of the bolt connecting port which is arranged in a large number is provided with a sealing plate which can increase the strength of the bolt connecting port and is not easy to damage, the concrete is not easy to damage a plugging object of a hole in pre-burying, the hole is not easy to block, the depth of the first flange socket is larger than that of the second flange socket, and the depth of the first flange socket exceeds the height of two rubber sealing rings, so that the rapid installation and rapid disassembly of any layer can be realized under the condition of setting the height of a house, and the sealing which is separated from the first flange socket cannot be generated due to the large weight of a vertical pipe after the installation.

When the height of the socket of the lower connector of the pre-embedded drainage pipe fitting is short, in order to quickly install, disassemble and replace the drainage vertical pipe, the first flange gland can be made into a correcting head with an upward convex upper end, the outer wall of the correcting head is smaller than the inner wall of the first flange socket, the top of the correcting head is shorter than the thickness of the rubber seal ring at the bottom of the bearing platform at the top of the first flange socket, the structure of the correcting head can be sealed and connected with and can correct the drainage vertical pipe connected below, and meanwhile, the drainage vertical pipe connected below is convenient to quickly install, disassemble and replace.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention.

FIG. 2 is an exploded view of the present invention.

FIG. 3 is a top view of the present invention.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Fig. 5 is an elevational view of the present invention.

The reference numbers in the figures are respectively: (1) an upper interface; (2) a lower interface; (3) a rubber seal ring; (4) a first flange gland; (5) a bolt; (6) a bearing table; (7) a quick-connection socket; (8) a second flange gland; (9) a third flange gland; (15) a closing plate; (21) a first bolt connection hole; (22) a second bolt connection hole; (23) a third bolt connection hole; (24) a first flange socket; (25) a second flange socket; (41) a bolt trepan boring; (42) a correction head; (51) a fixed head; (52) a nut; (211) a first bottom layer; (212) a first upper layer; (231) a second bottom layer; (232) and a second upper layer.

Detailed Description

The following is a further description of the utility model, but not limited to, embodiments thereof, with reference to the accompanying drawings.

Example 1

As shown in fig. 1-5, the pre-buried drain pipe fitting of the present invention is composed of an upper joint 1 and a lower joint 2. The lower connector 2 is a first flange bell mouth 24, the outer wall of the lower end of the first flange bell mouth 24 is provided with first bolt connecting holes 21 with planes opened outwards, the horizontal openings of at least one pair of the first bolt connecting holes 21 face opposite directions, the vertical direction of the plane openings of at least 3 first bolt connecting holes 21 is a two-layer structure with different opening widths, a vertical first bottom layer 211 and a vertical first upper layer 212, and the width of the first bottom layer 211 is smaller than that of the first upper layer 212; the rubber sealing ring 3 is arranged in the first flange bell mouth 24, the first flange gland 4 is arranged at the lower end of the rubber sealing ring 3, the bolt sleeve hole 41 is formed in the first flange gland 4, the bolt 5 is connected with the first bolt connecting hole 21 and the bolt sleeve hole 41, the length of the fixing head 51 of the bolt 5 is larger than the width, the bolt 5 is arranged in the first upper layer 212 on the first flange bell mouth 24 of the first bolt connecting hole 21, the nut 52 of the bolt 5 is arranged on the lower wall of the bolt sleeve hole 41 on the first flange gland 4, and the bearing table 6 protruding towards the inner wall is arranged on the inner wall below the upper connector 1 and on the inner wall above the lower connector 2.

Example 2

As shown in fig. 1, 2 and 3, the upper end of the first flange gland 4 of the pre-buried drain pipe fitting of the present invention has an upward convex correction head 42; the outer wall of the correcting head 42 is smaller than the inner wall of the first flange bell mouth 24, the top of the correcting head 42 is shorter than the bottom of the bearing platform 6 at the top of the first flange bell mouth 24 and is higher than the thickness of the rubber sealing ring 3, and the rubber sealing ring 3 is sleeved on the outer wall of the correcting head 42; the lower end of the first flange gland 4 is provided with a quick-connection socket 7, the outer wall of the quick-connection socket 7 is provided with a second bolt connecting hole 22 protruding out of the outer wall, the distance from the lower wall surface a of the bolt sleeve hole 41 on the first flange gland 4 to the upper wall surface b of the second bolt connecting hole 22 is 30mm, the inner wall of the quick-connection socket 7 is larger than the outer wall of the correcting head 42, the depth of the quick-connection socket 7 is 70mm, and the depth exceeds the height of the two rubber sealing rings 3; the lower end of the quick-connection socket 7 is provided with a second flange gland 8, the second flange gland 8 is provided with a bolt sleeve hole 41, rubber sealing rings 3 are arranged above the second flange gland 8 and below a second bolt connection hole 22, a bolt 5 is connected with the second bolt connection hole 22 and the second flange gland 8, and the length of a fixing head 51 of the bolt 5 is larger than the width.

Example 3

As shown in fig. 1 and 2, the depth of the first flanged socket 24 of the pre-buried drain pipe fitting of the present invention is 70mm, and the height exceeds the height of the two rubber sealing rings 3.

Example 4

As shown in fig. 1, 2, 3 and 4, the pre-buried drain pipe fitting upper connector 1 of the present invention is a second flange socket 25, a rubber seal ring 3 is arranged in the socket, 3 third bolt connection holes 23 are arranged on the socket, the horizontal openings of the third bolt connection holes 23 are outward, the horizontal openings of a pair of third bolt connection holes 23 face opposite directions, the vertical direction of the plane openings of the third bolt connection holes 23 is a two-

layer structure

231 and 232 with different widths, the width of the vertical second bottom layer 231 is greater than that of the second upper layer 232, a sealing plate 15 is arranged at the bottom of the third bolt connection holes 23, a third flange gland 9 is arranged above the rubber seal ring 3, a flange hole is arranged on the third flange gland 9, a bolt 5 is connected with the third flange gland 9 and the 3 third bolt connection holes 23 on the flange socket, a fixing head 51 of the bolt 5 is arranged above the sealing plate 15 and in the second bottom layer 231 below the second upper layer 232 of the third bolt connection holes 23, the nut 52 of the bolt 5 is above the third flange gland 9, the length of the fixing head 51 of the bolt 5 is larger than the width, the depth of the first flange socket 24 is larger than the depth of the second flange socket 25, and the depth of the first flange socket 24 exceeds the height of the two rubber sealing rings 3.

Example 5

As shown in figure 1, the upper connector 1 of the pre-buried drain pipe fitting is a second flange bell mouth 25, a rubber sealing ring 3 is arranged in the bell mouth, and 3 third bolt connecting holes 25 are formed in the bell mouth.

Example 6

As shown in fig. 1 and 2, the upper end of the first upper layer 212 of the pre-buried drain pipe fitting 24 of the present invention has a sealing plate 213.

Claims

1. A pre-buried drainage pipe fitting comprises an upper connector (1) and a lower connector (2); the method is characterized in that: the lower connector (2) is a first flange bell mouth (24), the outer wall of the lower end of the first flange bell mouth (24) is provided with first bolt connecting holes (21) with planes opened outwards, the horizontal openings of at least one pair of the first bolt connecting holes (21) face opposite directions, the vertical direction of the plane openings of at least 3 first bolt connecting holes (21) is of a two-layer structure with different opening widths, and the width of a vertical first bottom layer (211) is smaller than that of a first upper layer (212); there is rubber seal (3) in first flange bellmouth (24), rubber seal (3) lower extreme has first flange gland (4), there is bolt trepanning (41) on first flange gland (4), there are bolt connecting hole (21) and bolt trepanning (41) of bolt (5) connection, fixed head (51) length of bolt (5) is greater than the width, and in first upper strata (212), nut (52) of bolt (5) are on the lower wall of bolt trepanning (41) on first flange gland (4), go up the below of interface (1), on the top inner wall of lower interface (2) to convex bearing platform (6) of inner wall.

2. The embedment drainage pipe member of claim 1, wherein: the upper end of the first flange gland (4) is provided with a correction head (42) which protrudes upwards; the outer wall of the correcting head (42) is smaller than the inner wall of the first flange bell mouth (24), the top of the correcting head (42) is shorter than the bottom of the bearing platform (6) at the top of the first flange bell mouth (24) and is higher than the thickness of the rubber sealing ring (3), and the rubber sealing ring (3) is sleeved on the outer wall of the correcting head (42); the lower end of the first flange gland (4) is provided with a quick-connection bell mouth (7), the outer wall of the quick-connection bell mouth (7) is provided with a second bolt connecting hole (22) protruding out of the outer wall, the distance between the lower wall surface a of a bolt sleeve hole (41) on the first flange gland (4) and the upper wall surface b of the second bolt connecting hole (22) is more than 25mm, the inner wall of the quick-connection bell mouth (7) is more than the outer wall of the correcting head (42), the depth of the quick-connection bell mouth (7) is more than 40mm, and the depth exceeds the height of the two rubber sealing rings (3); the lower extreme of connect bell mouth (7) soon has second flange gland (8), has bolt trepanning (41) on second flange gland (8), and there are rubber seal (3) second bolt connection hole (22) below the top of second flange gland (8), bolt (5) connection second bolt connection hole (22) and second flange gland (8), and fixed head (51) length of bolt (5) is greater than the width.

3. The embedment drainage pipe member of claim 1, wherein: the depth of the first flange bell mouth (24) is more than 40mm, and the depth exceeds the height of the two rubber sealing rings (3).

4. The embedment drainage pipe member of claim 1, wherein: the upper connector (1) is a second flange socket (25), a rubber sealing ring (3) is arranged in the socket, 3 third bolt connecting holes (23) are formed in the outer wall of the socket, horizontal openings of the third bolt connecting holes (23) are outward, the horizontal openings of the pair of third bolt connecting holes (23) face opposite directions, the vertical direction of a plane opening of each third bolt connecting hole (23) is of a two-layer structure with different widths, the width of a vertical second bottom layer (231) is larger than that of a second upper layer (232), a sealing plate (15) is arranged at the bottom of each third bolt connecting hole (23), a third flange gland (9) is arranged above the rubber sealing ring (3), a bolt sleeve hole (41) is formed in each third flange gland (9), the bolt (5) is connected with the third flange gland (9) and the 3 third bolt connecting holes (23) in the second flange socket (25), and a fixing head (51) of the bolt (5) is arranged above the sealing plate (15), In a second bottom layer (231) below a second upper layer (232), nuts (52) of bolts (5) are arranged above a third flange gland (9), the length of fixing heads (51) of the bolts (5) is larger than the width of the fixing heads, the depth of a first flange socket (24) is larger than that of a second flange socket (25), and the depth of the first flange socket (24) exceeds the height of two rubber sealing rings (3).

5. The embedment drainage pipe member of claim 3, wherein: the upper connector (1) is a second flange bell mouth (25), a rubber sealing ring (3) is arranged in the bell mouth, 3 third bolt connecting holes (23) are formed in the outer wall of the bell mouth, horizontal openings of the third bolt connecting holes (23) are outward, the horizontal openings of a pair of the third bolt connecting holes (23) face opposite directions, the vertical direction of a plane opening of each third bolt connecting hole (23) is of a two-layer structure with different widths, a vertical second bottom layer (231) and a second upper layer (232) are arranged, the width of the second bottom layer (231) is larger than that of the second upper layer (232), a sealing plate (15) is arranged at the bottom of each third bolt connecting hole (23), a third flange gland (9) is arranged above the rubber sealing ring (3), a bolt sleeve hole (41) is formed in the third flange gland (9), and 3 third bolt connecting holes (23) in the second flange bell mouth (25) are connected through bolts (5), the fixing head (51) of the bolt (5) is arranged in a second bottom layer (231) above the closing plate (15) and below the second upper layer (232), the nut (52) of the bolt (5) is arranged above the third flange gland (9), the length of the fixing head (51) of the bolt (5) is larger than the width, the depth of the first flange socket (24) is larger than the depth of the second flange socket (25), and the depth of the first flange socket (24) exceeds the height of the two rubber sealing rings (3).

6. The embedment drainage pipe member of claim 2, wherein: go up interface (1) and be second flange bellmouth (25), have rubber seal (3) in the bellmouth, have 3 third bolted connection holes (23) on the bellmouth outer wall.

7. The embedment drainage pipe member of claim 1, wherein: the upper end of the first upper layer (212) of the first flange socket (24) is provided with a sealing plate (213).

8. The embedment drainage pipe member of claim 2, wherein: the upper end of the first upper layer (212) of the first flange socket (24) is provided with a sealing plate (213).

9. The embedment drainage pipe member of claim 3, wherein: the upper end of the first upper layer (212) of the first flange socket (24) is provided with a sealing plate (213).

10. The pre-buried drain pipe fitting of claim 4, wherein: the upper end of the first upper layer (212) of the first flange socket (24) is provided with a sealing plate (213).

11. The pre-buried drain pipe fitting of claim 5, wherein: the upper end of the first upper layer (212) of the first flange socket (24) is provided with a sealing plate (213).