CN220416515U

CN220416515U - Non-pushing flange spheroidal graphite cast iron jacking pipe double-socket connector

Info

Publication number: CN220416515U
Application number: CN202322009793.0U
Authority: CN
Inventors: 王瑞锋; 贾新刚
Original assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-01-30
Anticipated expiration: 2033-07-28

Abstract

The utility model discloses a pushing flange-free spheroidal graphite cast iron jacking pipe double-bellmouth connecting piece, wherein sockets are arranged at two ends of a jacking pipe (6), the sockets are matched with the double-bellmouth connecting piece (1), the double-bellmouth connecting piece (1) is arranged between the jacking pipes (6), an anti-corrosion coating (3) is arranged on the surface of the double-bellmouth connecting piece (1), and a first waterproof rubber ring (4) is arranged in the double-bellmouth connecting piece (1).

Description

Non-pushing flange spheroidal graphite cast iron jacking pipe double-socket connector

Technical Field

The utility model belongs to the field of connectors, and particularly relates to a spheroidal graphite cast iron jacking pipe double-socket connector without a pushing flange.

Background

The flangeless jacking pipe (steel pipe) is one of products of the existing non-excavation jacking pipe, and is contacted with a bell mouth stress piece through a socket, so that jacking construction of the jacking pipe is realized by utilizing a jacking force transmission structure formed by the stress piece and the bell mouth structure. The flangeless pipe jacking product adopts the traditional scribing type interface and the rubber ring, is reliable in sealing and convenient to install. With the development of the times, the urban process is fast, the area of an operation well required by the flange-free jacking pipe with the length of 6 meters is large, and the construction site is generally difficult to meet.

The flange-free jacking pipe with nonstandard length is produced by cutting a jacking pipe with the length of 6 meters (the general production length is 6 meters) into a required length, and the jacking pipe with the socket is cut to the required length for use due to the difference of the socket and the socket structure, the lining is polished on the jacking pipe on the other side, and the jacking pipe is returned to the furnace after smashing the pipe, so that the production cost is high.

The existing flangeless jacking pipe pushing force bearing piece is preloaded on a sand core required by centrifugal casting and positioned at a position corresponding to the annular surface of the bottom of the socket, and the pushing force bearing piece is added on the annular surface of the bottom of the socket through centrifugal casting. However, in this way, the molding rate and stability of the product are not high.

The utility model patent with the publication number of CN201715148U discloses a clamping and pressing type connecting piece for a stainless steel pipeline on the 1 st month 19 th 2011, the connecting piece comprises a body, an outer sealing groove and an inner sealing groove are arranged at the socket of the body, a socket middle part is arranged between the outer sealing groove and the inner sealing groove, an outer sealing ring is arranged in the outer sealing groove, an inner sealing ring is arranged in the inner sealing groove, a socket reinforcing edge is arranged on the right side of the inner sealing groove, the cross sections of the outer sealing groove and the inner sealing groove are in a protruding semicircle shape, the cross sections of the outer sealing ring and the inner sealing ring are in a round shape, and the connecting piece cannot effectively transmit the jacking force between pipelines, so that the use cost is high.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the pushing-free flange spheroidal graphite cast iron jacking pipe double-socket connecting piece which can effectively transfer the jacking force between pipelines, has a simple structure, low cost and stable and reliable quality.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

this there is not pushing away two bellmouth connecting pieces of flange nodular cast iron push pipe, the push pipe both ends are equipped with the socket, socket and two bellmouth connecting pieces cooperation, two bellmouth connecting pieces are established between the push pipe, two bellmouth connecting piece surface is equipped with anticorrosive coating, be equipped with first waterproof rubber ring in the two bellmouth connecting pieces.

The middle part of the inner side of the double-socket connecting piece is provided with a boss, and the boss is positioned between the end parts of the jacking pipe.

The pipe jacking outside is equipped with first concrete protection layer, be equipped with the clearance between first concrete protection layer and the double-bellmouth connecting piece, double-bellmouth connecting piece thickness with first concrete protection layer is unanimous.

The cross section of the double-socket connecting piece is of a T-shaped structure.

And a connecting piece filling layer is arranged in the double-socket connecting piece.

Reinforcing steel meshes are arranged in the connecting piece filling layer and the concrete protection layer.

The first waterproof rubber rings are arranged in pairs, and the first waterproof rubber rings are arranged at two ends of the double-socket connecting piece.

The socket comprises a first socket and a second socket, and the first socket and the second socket are respectively arranged at two ends of the jacking pipe.

The first socket is matched with the double-bellmouth connecting piece, the second socket is connected with a flangeless jacking pipe, a first bellmouth is arranged at one end of the flangeless jacking pipe, the first bellmouth is matched with the second socket, a second waterproof rubber ring is arranged at the inner end of the first bellmouth, and a second concrete protection layer is arranged on the outer side of the flangeless jacking pipe.

The first socket is matched with the double-socket connecting piece, the second socket is connected with the double-socket connecting piece, two ends of the double-socket pipe are provided with second sockets, the second sockets are matched with the second socket, the inner end of each second socket is provided with a third waterproof rubber ring, the outer side of the double-socket pipe is provided with a third concrete protection layer, and the third concrete protection layer is arranged between the second sockets.

The utility model has the technical effects that: the pushing-free flange spheroidal graphite cast iron jacking pipe double-socket connecting piece optimizes the production and stress modes of the centrifugal spheroidal graphite cast iron jacking pipe, can be matched with various jacking pipes for use, can effectively transfer the jacking force between two adjacent units, has the advantages of simple structure, low cost and stable and reliable quality, and improves the convenience of production and manufacturing and the selectivity of the flangeless jacking pipe market.

Drawings

The present specification includes the following drawings, the contents of which are respectively:

FIG. 1 is a schematic structural view of a push flange-free spheroidal graphite cast iron pipe-jacking double-socket connector of the utility model;

FIG. 2 is a schematic diagram of a top pipe and flangeless top pipe connection of a non-push flanged ductile iron top pipe double socket connector of the present utility model;

fig. 3 is a schematic diagram of the connection of the top pipe of the non-pushing flange ductile iron top pipe double-socket connecting piece and the double-socket pipe piece.

Marked in the figure as: 1. a double socket connector; 2. a connecting piece filling layer; 3. an anti-corrosion coating; 4. a first waterproof rubber ring; 5. a first concrete protective layer; 6. jacking pipes; 7. a lining; 8. a gap; 9. a first socket; 10. a second socket; 11. a boss; 12. a flangeless jacking pipe; 13. a double socket pipe; 14. a first socket; 15. a second socket; 16. the second waterproof rubber ring; 17. a third waterproof rubber ring; 18. a second concrete protective layer; 19. a third concrete protective layer; 20. a first pushing stop block; 21. the second pushing block is pushed.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid those skilled in the art in a more complete, accurate and thorough understanding of the inventive concepts and aspects of the utility model, and to facilitate their practice.

As shown in fig. 1 to 3, the pushing-free flange spheroidal graphite cast iron jacking pipe double-socket connector is characterized in that sockets are formed at two ends of a jacking pipe 6, the sockets are matched with the double-socket connector 1, the double-socket connector 1 is arranged between the jacking pipes 6, an anti-corrosion coating 3 is arranged on the surface of the double-socket connector 1, and a first waterproof rubber ring 4 is arranged in the double-socket connector 1.

The socket connecting piece is an annular casting piece and is cast by adopting a lost foam process; the ductile iron jacking pipe 6 without the pushing flange is formed by adopting a centrifugal machine for pouring; can be matched with a section of straight pipe with a big-end-free jacking pipe 6 for use, and transmits force to the adjacent straight jacking pipe 6 through a connecting piece. The force can also be transmitted to the next stress unit by means of a flangeless push pipe 12, a double socket pipe 13.

The middle part of the inner side of the double-socket connecting piece 1 is provided with a boss 11, and the boss 11 is positioned between the end parts of the jacking pipe 6.

As shown in fig. 1 to 3, the P value is the socket depth; l is the length of a straight pipe; n is the length of the boss 11, and the boss 11 is designed for the inner bottom structure of the socket; the thickness and width of the bellmouth and boss 11 will also vary according to the pipe diameter. The socket is contacted with the boss 11, and a stress unit consists of a double-socket connecting piece 1 and a section of big-end-free flange-free ball-milling cast iron jacking pipe 6. The boss 11 is a main stress point, the inner diameter of the boss 11 can be flush with the surface of the pipe jacking liner 7 according to the requirement, and the boss can also properly extend towards the pipe center and is smaller than the inner diameter of the pipe jacking liner 7.

The outside of the jacking pipe 6 is provided with a first concrete protection layer 5, a gap 8 is arranged between the first concrete protection layer 5 and the double-bellmouth connecting piece 1, and the thickness of the double-bellmouth connecting piece 1 is consistent with that of the first concrete protection layer 5.

The concrete protection layer can be epoxy powder, epoxy resin, other coatings and the like, C30 and above grade concrete is selected, when the concrete grouting operation is performed on the outer surface of the casting tool die, the special grouting tool capable of being repeatedly used is adopted for performing the concrete grouting operation, the concrete protection layer is convenient and quick, and the external concrete surface is polished, painted and sprayed after the concrete protection layer is cured for 24 hours.

Above-mentioned structure, the pipeline diameter of guaranteeing the connection is unanimous, has guaranteed the unanimous and pleasing to the eye of pipeline connection outward appearance, and clearance 8 can make things convenient for the installation construction of two bellmouth connecting pieces 1, can avoid simultaneously that the concrete protection layer expands the back to cause direct extrusion to two bellmouth connecting pieces 1.

As shown in fig. 1 to 3, the double socket connector 1 has a T-shaped cross section. The boss 11 is the main stress point of pipe connection, and when boss 11 extends to the pipe core, the minimum internal diameter of double socket connecting piece 1 is less than the inner diameter of push pipe inside lining 7, and double socket connecting piece 1 cross-section is T type structure this moment, and above-mentioned structural design can be convenient for with the transmission of thrust to adjacent body atress unit.

As shown in fig. 1, a double socket connector 1 is provided with a connector filling layer 2. The filling layer 2 of the connecting piece can be made of concrete, cast iron, talcum powder wall putty and other fillers, and the special and reusable grouting tool is adopted for filling the concrete and similar products such as the talcum powder wall putty and the like.

Reinforcing steel meshes are arranged in the connecting piece filling layer 2 and the concrete protection layer. The mesh is arranged at 1/3 of the connecting piece filling layer 2, which is close to the outer surface, from the inside of the connecting piece filling layer 2 to 25 mm.25mm reinforcing steel meshes; the concrete protective layer is internally provided with a reinforcing steel mesh, the reinforcing steel is selected from round steel with the length of not less than 4mm, the mesh spacing is 100mm and 100mm, the mesh is placed between the jacking pipe 6 and the pouring tool die, and the mesh distance is close to 1/3 of the inner edge side of the die.

As shown in fig. 1 to 3, the first waterproof rubber rings 4 are provided in pairs, and the first waterproof rubber rings 4 are provided at both ends of the double-bellmouth connecting member 1. The first waterproof rubber ring 4 is required to meet the requirement of a T-shaped interface of the double-socket connector 1, and the outer diameter is manufactured according to the size of GB/T13295-2008, so that the sealing and waterproof effects are achieved. And the annular surface of the double-bellmouth connecting piece 1 attached to the waterproof rubber ring needs to be polished, so that the rubber ring is prevented from being overturned or damaged during construction.

As shown in fig. 2 and 3, the socket includes a first socket 9 and a second socket 10, and the first socket 9 and the second socket 10 are respectively provided at both ends of the jacking pipe 6.

As shown in fig. 2, the first socket 9 is matched with the double-socket connector 1, the second socket 10 is connected with a flangeless jacking pipe 12, one end of the flangeless jacking pipe 12 is provided with a first socket 14, the first socket 14 is matched with the second socket 10, the inner end part of the first socket 14 is provided with a second waterproof rubber ring 16, and the outer side of the flangeless jacking pipe 12 is provided with a second concrete protection layer 18.

As shown in fig. 3, the first socket 9 is matched with the double-socket connector 1, the second socket 10 is connected with the double-socket connector 1, two ends of the double-socket pipe 13 are provided with second sockets 15, the second sockets 15 are matched with the second socket 10, the inner end part of the second socket 15 is provided with a third waterproof rubber ring 17, the outer side of the double-socket pipe 13 is provided with a third concrete protection layer 19, and the third concrete protection layer 19 is arranged between the second sockets 15.

The double socket connector 1 is produced using a common casting process. And a special mould and a sand mould for manufacturing the double-bellmouth connecting piece 1 are used for forming the double-bellmouth connecting piece 1, and the bellmouth distance p and the length, the width and the thickness of the boss 11 can be designed according to different pipe diameters of the jacking pipe 6, the length of the jacking pipe 6 and stress requirements.

During the production of the centrifugal machine, the bellmouth sand core is not connected with the straight pipe mould in a pressing way, and the baffle ring is manufactured on the outer side of the mould, so that molten iron overflow during centrifugal pouring is prevented. Directly producing the large-head free nodular cast iron straight pipe with the length of 6 meters or more, and cutting according to the requirements.

The connecting piece filling layer 2 and the double-socket connecting piece 1 are made of the same material, and a special die and a sand mold are manufactured by casting and forming at one time by using molten iron. The external spraying epoxy powder is subjected to electrostatic spraying, the pipe fitting body is heated to 180 ℃, the powder is absorbed on the pipe fitting to be melted into a whole, the external is attractive, and the corrosion resistance and the wear resistance are better.

The anti-corrosion coating 3 is formed by electrostatic spraying of epoxy powder, the pipe fitting body is heated to 180 ℃, and the powder is absorbed on the pipe fitting to be melted into a whole. Has stronger anticorrosion effect, and can also select epoxy resin or other coating according to the requirement, and carry out anticorrosion spraying treatment by high-pressure spraying equipment.

When the pipe body of the flangeless spheroidal graphite cast iron jacking pipe 6 is produced by a centrifugal machine, the bellmouth sand core is not connected with the straight pipe mould in a pressing way, and a baffle ring is manufactured on the outer side of the mould, so that molten iron overflow during centrifugal pouring is prevented. Through optimization, the cast iron straight pipe without the large and small head ball mill with the length of 6 meters or more is directly produced, and then cutting operation is carried out according to the requirements of customers.

As shown in fig. 1 to 3, the inner side of the jacking pipe 6 is provided with an inner lining 7, and the flangeless spheroidal graphite cast iron jacking pipe inner lining 7 is divided into aluminate cement mortar and silicate cement mortar according to different water delivery; the water purifying pipe is made of silicate cement mortar, the sewage pipe is made of aluminate cement mortar, the sewage pipe is centrifugally sprayed into the ball-milling cast iron pipe through a lining coater, the curing furnace is cured for 7-8 hours, and after the curing of the lining 7 is finished, the lining 7 is polished by a polisher. Cutting of the jacking pipe 6 can damage the lining 7, repair of the edge of the lining 7 is carried out before external concrete pouring, and the lining is cured together with external concrete, so that repair strength is guaranteed.

As shown in fig. 1, the pushing-free flange spheroidal graphite cast iron jacking pipe double-socket connector is characterized in that when being connected with a straight pipe without a big-small jacking pipe 6, the double-socket connector 1 is directly arranged between two straight pipes.

As shown in fig. 2, when the top pipe 6 is connected with the flangeless top pipe 12, the structure of the socket of the flangeless top pipe 12 is the same as the structure of one side of the double socket connector 1, so that the uniform pushing force transmitted by the connection of the two can be ensured. The second jack 10 of the jacking pipe 6 can extend into the first bell mouth 14, and the end of the jacking pipe 6 is abutted against the first pushing stop block 20 in the first bell mouth 14, so that the pipeline connection can be completed. The bell mouth structure of the flangeless pipe jacking 12 is consistent with the structure of one side of the double-bell mouth connecting piece 1, the other end of the flangeless pipe jacking 12 is of a straight pipe jacking structure, and the pipe fitting or the connecting piece with the bell mouth can be continuously connected.

As shown in fig. 3, when the push pipe 6 is connected to the double-socket pipe 13, since the structure of the socket of the double-socket pipe 13 is the same as that of the double-socket joint 1, it is ensured that the pushing force transmitted by the connection of the two is uniform. After the double-bellmouth connecting piece 1 is installed at one end of the jacking pipe 6, the double-bellmouth pipe piece 13 can be connected again, the second socket 10 of the jacking pipe 6 stretches into the second bellmouth 15, and the end of the jacking pipe 6 is abutted with the second pushing stop block 21, so that the pipeline connection can be completed. The two ends of the double socket pipe 13 have the same socket structure, so that other jacking pipes can be continuously connected.

Therefore, the structure of the double-socket connecting piece is not limited to be applied to the pipeline connecting piece, and the double-socket connecting piece can be applied to the socket structure position of the pipeline, so that the flexible installation can be realized, the double-socket connecting piece can be adapted to installing different types of pipe bodies, the jacking force can be effectively transmitted, the stress between the pipe bodies after the installation is uniform, and the connecting effect is stable and reliable.

The flange-free spheroidal graphite cast iron jacking pipe double-socket connecting piece optimizes the production and stress modes of the centrifugal spheroidal graphite cast iron jacking pipe 6, can be matched with various jacking pipes for use, can effectively transfer jacking force between two adjacent units, has a simple structure, low cost and stable and reliable quality, improves the convenience of production and manufacturing and the selectivity of the flange-free jacking pipe 12 market, and has good application prospect.

The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims

1. The utility model provides a do not have pushing away flange nodular cast iron push pipe double socket connecting piece which characterized in that: the utility model discloses a pipe jacking device, including push pipe (6), socket, double-bellmouth connecting piece (1), anti-corrosion coating (3) are equipped with at push pipe (6) both ends, socket cooperates with double-bellmouth connecting piece (1), double-bellmouth connecting piece (1) are established between push pipe (6), double-bellmouth connecting piece (1) surface is equipped with first waterproof rubber ring (4) in the double-bellmouth connecting piece (1).

2. The push-free flange ductile iron pipe jacking double-socket connector according to claim 1, wherein: the middle part of the inner side of the double-socket connecting piece (1) is provided with a boss (11), and the boss (11) is positioned between the end parts of the jacking pipe (6).

3. The push-free flange ductile iron pipe jacking double-socket connector according to claim 2, wherein: the pipe jacking device is characterized in that a first concrete protection layer (5) is arranged on the outer side of the pipe jacking device (6), a gap (8) is formed between the first concrete protection layer (5) and the double-socket connecting piece (1), and the thickness of the double-socket connecting piece (1) is consistent with that of the first concrete protection layer (5).

4. The push flange-free spheroidal graphite cast iron pipe-jacking double-socket connector according to claim 3, wherein: the section of the double-socket connecting piece (1) is of a T-shaped structure.

5. The push-free flanged ductile iron pipe jacking double socket connector according to any one of claims 1 to 4, wherein: and a connecting piece filling layer (2) is arranged in the double-socket connecting piece (1).

6. The push flange-free spheroidal graphite cast iron pipe-jacking double-socket connector according to claim 5, wherein: reinforcing steel meshes are arranged in the connecting piece filling layer (2) and the concrete protection layer.

7. The push-free flange ductile iron pipe jacking double-socket connector according to claim 4 wherein: the first waterproof rubber rings (4) are arranged in pairs, and the first waterproof rubber rings (4) are arranged at two ends of the double-bellmouth connecting piece (1).

8. The push-free flange ductile iron pipe jacking double-socket connector according to claim 1, wherein: the socket comprises a first socket (9) and a second socket (10), and the first socket (9) and the second socket (10) are respectively arranged at two ends of the jacking pipe (6).

9. The push flange-free spheroidal graphite cast iron pipe-jacking double-socket connector according to claim 8, wherein: the first socket (9) is matched with the double-bellmouth connecting piece (1), the second socket (10) is connected with a flangeless jacking pipe (12), a first bellmouth (14) is arranged at one end of the flangeless jacking pipe (12), the first bellmouth (14) is matched with the second socket (10), a second waterproof rubber ring (16) is arranged at the inner end part of the first bellmouth (14), and a second concrete protection layer (18) is arranged on the outer side of the flangeless jacking pipe (12).