A socketed ductile cast iron pipe pile

Abstract

The utility model provides a socket type nodular cast iron pipe pile, including first nodular cast iron pipe pile, second nodular cast iron pipe pile, conical pouring ring, stainless steel anticorrosive inner cover and stainless steel interface anticorrosive outer cover, the second nodular cast iron pipe pile upper end is integrally equipped with the socket, and the first nodular cast iron pipe pile insertion end is longitudinally inserted at the socket, and the socket is clamped with the conical pouring ring, and the conical pouring ring outside lower end is fixed with first sealing washer and second sealing washer respectively, and the conical pouring ring upper end and first nodular cast iron pipe pile insertion end all are equipped with annular groove, the utility model adopts the socket of multiple steel bars positioning, realizes the locking and prevents the structure from falling off, and the disjoint cracking phenomenon is not easy to occur, and then cooperates with multistage self -adaptation sealing assembly can effectively solve the sealing failure, the compensation deficiency and the corrosion influence.

Description

Technical Field

[0001] This utility model relates to a socket-type ductile iron pipe pile, belonging to the field of pipe pile technology. Background Technology

[0002] Socket-type ductile iron pipe piles are widely used in municipal water supply and drainage networks, underground water supply / gas transmission pipelines in mines, and underground integrated pipe corridors due to their advantages such as high strength, high toughness, and corrosion resistance. Their "socket-joint" connection method simplifies installation, eliminates the need for welding / flanges, and is suitable for underground confined space operations (such as underground mine roadways with a width of ≤2m).

[0003] However, existing socket-type ductile iron pipe piles are difficult to meet the needs of complex working conditions: for example, insufficient sealing reliability: traditional pipe piles rely only on a "single rubber ring" seal (such as EPDM rubber ring), and after long-term use, the rubber ages or is corroded by groundwater and soil, resulting in seal failure and leakage; for example, weak pull-out and bending resistance: the socket connection is fixed only by the "friction force of the spigot inserting into the socket", without a locking structure. When there is vibration in the mine or soil settlement in the municipal pipeline network, the pipe pile is prone to disengagement. Now there is an urgent need for a socket-type ductile iron pipe pile to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a socket-type ductile iron pipe pile to solve the problems mentioned in the background technology. This utility model adopts a multi-steel positioning socket to realize a locking and anti-disengagement structure, which is not prone to disengagement and cracking. In addition, with the multi-level adaptive sealing component, it can effectively solve the problems of sealing failure, insufficient compensation and corrosion.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a socket-type ductile iron pipe pile, comprising a first ductile iron pipe pile, a second ductile iron pipe pile, a conical casting ring, a stainless steel anti-corrosion inner sleeve, and a stainless steel interface anti-corrosion outer sleeve. The upper end of the second ductile iron pipe pile is integrally provided with a socket. The insertion end of the first ductile iron pipe pile is longitudinally inserted into the socket. A conical casting ring is inserted into the socket. A first sealing ring and a second sealing ring are respectively fixed to the lower outer end of the conical casting ring. Annular grooves are formed at the upper end of the conical casting ring and the insertion end of the first ductile iron pipe pile. An embedded ring is inserted between the two annular grooves. Multiple positioning grooves are provided inside each of the embedded rings. Multiple steel positioning rods are provided through the upper end face of the embedded ring. An auxiliary expansion ring is fixed on the inner ring side of the embedded ring. A Y-shaped main sealing rubber ring is embedded in the upper edge of the conical casting ring. A stainless steel anti-corrosion inner sleeve is fixed to the lower outer side of the first ductile iron pipe pile. A stainless steel interface anti-corrosion outer sleeve is welded to the outside of the stainless steel anti-corrosion inner sleeve. A butyl rubber waterstop strip is embedded in the upper edge of the socket. A first anti-corrosion paste filling cavity is formed between the stainless steel anti-corrosion inner sleeve, the first ductile iron pipe pile and the conical casting ring. A second anti-corrosion paste filling cavity is formed between the stainless steel anti-corrosion inner sleeve, the stainless steel interface anti-corrosion outer sleeve, the socket and the upper edge of the conical casting ring.

[0006] Furthermore, the socket is provided with a first retaining ring groove and a second retaining ring groove, and the first sealing ring and the second sealing ring are respectively filled in the first retaining ring groove and the second retaining ring groove.

[0007] Furthermore, the upper and lower ends of the plurality of steel bar positioning rods are respectively engaged in the plurality of positioning grooves.

[0008] Furthermore, the lower end of the stainless steel anti-corrosion inner sleeve is inserted into the Y-shaped main sealing rubber ring.

[0009] Furthermore, the lower end of the stainless steel interface anti-corrosion jacket is tightly abutted against the butyl rubber waterstop strip.

[0010] Furthermore, both the first and second preservative filling cavities are filled with preservatives.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a socket-type ductile iron pipe pile. Because it adds a conical casting ring, a first sealing ring, a second sealing ring, an embedded ring, a steel bar positioning rod, an auxiliary expansion ring, a Y-shaped main sealing rubber ring, a stainless steel anti-corrosion inner sleeve, a stainless steel interface anti-corrosion outer sleeve, and a butyl rubber waterstop strip, the structure is reasonable. It adopts a multi-steel bar positioning socket to achieve a locking and anti-detachment structure, which is not prone to disengagement and cracking. In addition, the multi-level adaptive sealing components can effectively solve the problems of sealing failure, insufficient compensation and corrosion. It is highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a structural schematic diagram of a socket-type ductile iron pipe pile according to the present invention;

[0014] Figure 2 This is a partial cross-sectional structural schematic diagram of a socket-type ductile iron pipe pile according to the present invention.

[0015] Figure 3 This is a schematic diagram of the combined structure of a stainless steel anti-corrosion outer sleeve and a stainless steel anti-corrosion inner sleeve for a socket-type ductile iron pipe pile according to the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of multiple steel bar positioning rods for a socket-type ductile iron pipe pile according to this utility model.

[0017] In the figure: 1-First ductile iron pipe pile, 2-Second ductile iron pipe pile, 3-Socket, 4-Conical casting ring, 5-First sealing ring, 6-Second sealing ring, 7-Annular groove, 8-Embedded ring, 9-Rebar positioning rod, 10-Auxiliary expansion ring, 11-Y-type main sealing rubber ring, 12-Stainless steel anti-corrosion inner sleeve, 13-Stainless steel interface anti-corrosion outer sleeve, 14-Butyl rubber waterstop strip, 15-First anti-corrosion paste filling cavity, 16-Second anti-corrosion paste filling cavity. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-4This utility model provides a technical solution: a socket-type ductile iron pipe pile, including a first ductile iron pipe pile 1, a second ductile iron pipe pile 2, a conical casting ring 4, a stainless steel anti-corrosion inner sleeve 12, and a stainless steel interface anti-corrosion outer sleeve 13. The upper end of the second ductile iron pipe pile 2 is integrally provided with a socket 3. The insertion end of the second ductile iron pipe pile 2 is longitudinally inserted into the socket 3. The conical casting ring 4 is inserted into the socket 3. The lower end of the conical casting ring 4 is respectively fixed with a first sealing ring 5 and a second sealing ring 6. The upper end of the conical casting ring 4 and the insertion end of the first ductile iron pipe pile 1 are both provided with annular grooves 7. An embedded ring 8 is inserted between the two annular grooves 7. Multiple positioning grooves are provided in both annular grooves 7. Multiple steel bar positioning rods 9 are provided through the upper surface of the embedded ring 8. The inner ring side of the embedded ring 8 is fixed. The design includes an auxiliary expansion ring 10, a Y-shaped main sealing rubber ring 11 embedded in the upper edge of the conical casting ring 4, a stainless steel anti-corrosion inner sleeve 12 fixed to the lower outer side of the first ductile iron pipe pile 1, a stainless steel interface anti-corrosion outer sleeve 13 welded to the outside of the stainless steel anti-corrosion inner sleeve 12, a butyl rubber waterstop strip 14 embedded in the upper edge of the socket 3, a first anti-corrosion paste filling cavity 15 formed between the stainless steel anti-corrosion inner sleeve 12, the first ductile iron pipe pile 1 and the conical casting ring 4, and a second anti-corrosion paste filling cavity 16 formed between the stainless steel anti-corrosion inner sleeve 12, the stainless steel interface anti-corrosion outer sleeve 13, the socket 3 and the upper edge of the conical casting ring 4. This design solves the problem of easy disengagement and cracking of existing socket-type ductile iron pipe piles. In addition, the multi-level adaptive sealing components can effectively solve the problems of sealing failure, insufficient compensation and corrosion.

[0020] As the first embodiment of this utility model: a first retaining ring groove and a second retaining ring groove are respectively opened inside the socket 3. The first sealing ring 5 and the second sealing ring 6 are respectively filled in the first retaining ring groove and the second retaining ring groove. By adding the first sealing ring 5 and the second sealing ring 6 respectively filling the first retaining ring groove and the second retaining ring groove, the double sealing ring structure forms a two-level basic sealing barrier in the socket, which can improve the installation sealing between the conical casting ring 4 and the second ductile iron pipe pile 2.

[0021] Multiple steel bar positioning rods 9 are inserted into multiple positioning grooves at their upper and lower ends respectively. Through the cooperation between the added steel bar positioning rods 9 and the positioning grooves in the annular groove 7, a mechanical interlock is formed after insertion, which prevents the pipe pile from disengaging when subjected to axial tension or vibration, and significantly enhances the pull-out resistance of the connection.

[0022] The lower end of the stainless steel anti-corrosion inner sleeve 12 is inserted into the Y-shaped main sealing rubber ring 11. With this added structure, the lip of the Y-shaped main sealing rubber ring 11 undergoes adaptive deformation after being squeezed by the stainless steel anti-corrosion inner sleeve 12, forming a tight dynamic seal. Even if the pipe pile deflects slightly or settles, the sealing effect can be maintained.

[0023] The lower end of the stainless steel interface anti-corrosion jacket 13 is tightly pressed against the butyl rubber waterstop strip 14. The added butyl rubber waterstop strip 14 and the lower end of the stainless steel interface anti-corrosion jacket 13 form a mechanical compression seal, which can block the external corrosive environment.

[0024] Both the first anti-corrosion filling cavity 15 and the second anti-corrosion filling cavity 16 are filled with anti-corrosion paste. By adding filling cavities and injecting anti-corrosion paste, a long-lasting chemical anti-corrosion isolation layer is formed in the key areas inside the interface, which complements the mechanical seal and fundamentally improves the overall corrosion resistance of the interface.

[0025] As a second embodiment of this utility model: during actual installation, the conical casting ring 4 is first placed into the socket 3 of the second ductile iron pipe pile 2, and the first sealing ring 5 and the second sealing ring 6 at its lower end are tightly fitted with the retaining ring groove on the inner wall of the socket to complete the initial sealing.

[0026] Subsequently, the stainless steel anti-corrosion inner sleeve 12 and the stainless steel interface anti-corrosion outer sleeve 13 are welded to the lower end of the first ductile iron pipe pile 1. The insertion end of the first ductile iron pipe pile 1 is then aligned with the socket 3 and slowly inserted. During insertion, its end will compress the auxiliary expansion ring 10 for sealing. When the first ductile iron pipe pile 1 is inserted into place, its annular groove 7 aligns with the annular groove 7 at the upper end of the conical casting ring 4. At this time, the embedded ring 8 is engaged in the upper and lower annular grooves 7, and the upper and lower ends of the multiple reinforcing bar positioning rods 9 are respectively embedded in the positioning grooves in the two annular grooves 7, achieving mechanical locking and effectively preventing the pipe pile from coming off. During this process, the lower end of the stainless steel anti-corrosion inner sleeve 12 is pressed into the Y-shaped main sealing rubber ring 11. The lower end of the stainless steel interface anti-corrosion outer sleeve 13 is tightly pressed against the butyl rubber waterstop strip 14 at the upper edge of the socket 3, forming an external seal.

[0027] Finally, special anti-corrosion paste is injected into the first anti-corrosion paste filling cavity 15 and the second anti-corrosion paste filling cavity 16 through the reserved grease injection holes until they are full. At this point, the entire socket 3 has a multi-level, self-adaptive sealing and anti-corrosion system composed of double basic sealing rings, Y-type main seal, mechanically tightened water-stop strip and long-lasting anti-corrosion paste. At the same time, reliable mechanical locking is also achieved through multiple steel bar positioning rods 9, which greatly improves the sealing durability and structural stability of the pipe pile connection.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A socket-type ductile iron pipe pile, comprising a first ductile iron pipe pile (1), a second ductile iron pipe pile (2), a conical casting ring (4), a stainless steel anti-corrosion inner sleeve (12), and a stainless steel interface anti-corrosion outer sleeve (13), characterized in that: The second ductile iron pipe pile (2) is integrally provided with a socket (3) at its upper end. The insertion end of the first ductile iron pipe pile (1) is longitudinally inserted into the socket (3). A conical casting ring (4) is inserted into the socket (3). A first sealing ring (5) and a second sealing ring (6) are fixed to the lower outer end of the conical casting ring (4). An annular groove (7) is provided at the upper end of the conical casting ring (4) and the insertion end of the first ductile iron pipe pile (1). An embedded ring (8) is inserted between the two annular grooves (7). Multiple positioning grooves are provided in the two annular grooves (7). Multiple steel bar positioning rods (9) are provided through the upper surface of the embedded ring (8). An auxiliary expansion ring is fixed to the inner ring side of the embedded ring (8). (10) A Y-shaped main sealing rubber ring (11) is embedded in the upper edge of the conical casting ring (4). A stainless steel anti-corrosion inner sleeve (12) is fixed to the lower end of the first ductile iron pipe pile (1). A stainless steel interface anti-corrosion outer sleeve (13) is welded to the outside of the stainless steel anti-corrosion inner sleeve (12). A butyl rubber waterstop strip (14) is embedded in the upper edge of the socket (3). A first anti-corrosion paste filling cavity (15) is formed between the stainless steel anti-corrosion inner sleeve (12), the first ductile iron pipe pile (1), and the conical casting ring (4). A second anti-corrosion paste filling cavity (16) is formed between the stainless steel anti-corrosion inner sleeve (12), the stainless steel interface anti-corrosion outer sleeve (13), the socket (3), and the upper edge of the conical casting ring (4).

2. The socket-type ductile iron pipe pile according to claim 1, characterized in that: The socket (3) is provided with a first retaining ring groove and a second retaining ring groove, and the first sealing ring (5) and the second sealing ring (6) are respectively filled in the first retaining ring groove and the second retaining ring groove.

3. A socket-type ductile iron pipe pile according to claim 1, characterized in that: The upper and lower ends of the multiple steel bar positioning rods (9) are respectively inserted into multiple positioning grooves.

4. A socket-type ductile iron pipe pile according to claim 1, characterized in that: The lower end of the stainless steel anti-corrosion inner sleeve (12) is inserted into the Y-shaped main sealing rubber ring (11).

5. A socket-type ductile iron pipe pile according to claim 1, characterized in that: The lower end of the stainless steel interface anti-corrosion jacket (13) is tightly abutted against the butyl rubber waterstop strip (14).

6. A socket-type ductile iron pipe pile according to claim 1, characterized in that: Both the first preservative filling cavity (15) and the second preservative filling cavity (16) are filled with preservative.

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