Steel pipe structure

Abstract

The application discloses a steel pipe structure, which comprises a pipe body and prestressed tendons, the pipe body comprises a socket end and a spigot end, the socket end is in clamping cooperation with the spigot end, and at least one prestressed tendon is spirally wound to the socket end, and the prestressed tendon can be elastically deformed under the action of external force. The application can improve the stability and reliability of the steel pipe structure.

Description

Technical Field

[0001] This application relates to the field of steel pipe technology, and more specifically, to a steel pipe structure. Background Technology

[0002] In existing technologies, multiple pipe bodies in a steel pipe structure are generally connected together by a snap-fit ​​connection between the socket end and the spigot end. However, under conditions of high burial depth and high soil cover, the socket end and spigot end of the pipe body are easily subjected to large vertical soil pressure, lateral soil pressure and axial soil pressure, which in turn causes bearing deformation and seriously affects the stability and reliability of the steel pipe structure.

[0003] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0004] One objective of this application is to provide a new technical solution for steel pipe structures.

[0005] To achieve the above objectives, according to a first aspect of this application, a steel pipe structure is provided, comprising:

[0006] The pipe body includes a socket end and a spigot end, wherein the socket end and the spigot end are engaged in a snap-fit ​​connection.

[0007] The prestressing tendon, at least one of which is spirally wound to the socket end, is capable of elastic deformation under the action of external force.

[0008] Optionally, the prestressed tendon includes at least one of steel wire and carbon fiber composite tendon.

[0009] Optionally, the axial length of the prestressing tendon is greater than the axial length of the socket end.

[0010] Optionally, it also includes a protective layer that can cover the prestressing tendons to form a composite structural layer.

[0011] Optionally, the protective layer includes at least one of the following: a mortar layer, a three-layer polyethylene anti-corrosion coating, an epoxy resin powder coating, an epoxy coal tar coating, an epoxy resin fiberglass anti-corrosion layer, and a coal tar enamel coating.

[0012] Optionally, the socket end is provided with a first groove and a second groove;

[0013] It also includes a first sealing ring and a second sealing ring, the first sealing ring being disposed in the first groove and the second sealing ring being disposed in the second groove.

[0014] Optionally, the socket end includes a first stop section, a second stop section, and a connecting section, wherein the connecting section is disposed between the first stop section and the second stop section;

[0015] The socket end also includes a first protrusion and a second protrusion, the first protrusion engaging with the second stop section, and the second protrusion engaging with the first stop section.

[0016] Optionally, the socket end further includes a third protrusion and a fourth protrusion, wherein a first groove is formed between the first protrusion and the third protrusion, a second groove is formed between the third protrusion and the fourth protrusion, and a third groove is formed between the second protrusion and the fourth protrusion;

[0017] Wherein, the depth of the third groove is less than the depth of the first groove; or, the depth of the third groove is less than the depth of the second groove.

[0018] Optionally, the distance between the first protrusion and the bottom wall of the first groove is less than the distance between the third protrusion and the bottom wall of the first groove.

[0019] Optionally, the first sealing ring is a rubber ring; the second sealing ring is a rubber ring.

[0020] The steel pipe structure in this embodiment of the application, by setting spiral prestressing tendons on the socket end, forms a ribbed structure with the socket end and the prestressing tendons, which increases the stiffness and deformation resistance of the socket end, thereby effectively improving the stability and reliability of the steel pipe structure.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic diagram of the steel pipe structure in one embodiment of the present invention.

[0024] Figure 2 This is an assembly drawing of the steel pipe structure in one embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Pipe body; 101. Socket end; 1011. First stop section; 1012. Second stop section; 1013. Connecting section; 102. Spigot end; 1021. First protrusion; 1022. Second protrusion; 1023. Third protrusion; 1024. Fourth protrusion; 10201. First groove; 10202. Second groove; 10203. Third groove; 103. Main body;

[0027] 2. Prestressed tendons;

[0028] 3. Protective layer;

[0029] 4. First sealing ring;

[0030] 5. Second sealing ring. Detailed Implementation

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] like Figures 1 to 2 As shown, the steel pipe structure in this embodiment includes: a pipe body 1, the pipe body 1 including a socket end 101 and a spigot end 102, the socket end 101 and the spigot end 102 being engaged; and a prestressing tendon 2, at least one of the prestressing tendons 2 being spirally wound to the socket end 101, the prestressing tendon 2 being able to undergo elastic deformation under the action of external force.

[0037] Specifically, under conditions of high burial depth and high soil cover, the pressure deformation of steel pipe structures mainly lies in the concentration of external pressure and the deformation of the socket.

[0038] The external pressure concentration is mainly due to the fact that the high burial depth and high soil cover conditions will cause the pipe body 1 to bear excessive vertical and lateral soil pressure. The excessive vertical and lateral soil pressure is prone to cause local stress concentration at the connection of multiple pipe bodies 1 (since multiple pipe bodies 1 are connected together by the snap-fit ​​of the socket end 101 and the spigot end 102, this refers to the spigot end 101 and the spigot end 102). This will cause the pipe body 1 to deflect or undergo radial deformation.

[0039] The deformation of the socket and spigot joint is mainly due to the excessive axial earth pressure under the conditions of high burial depth and high soil cover. This pressure can easily cause micro-displacement at the joint of the socket end 101 and the spigot end 102 (since the socket end 101 is located outside the spigot end 102, the excessive axial earth pressure can easily cause the socket end 101 to undergo micro-displacement first). Although the existing technology uses rubber sealing rings on the socket end 101 or the spigot end 102 of the pipe body 1 to compensate for the displacement caused by axial pressure through the elastic deformation of the rubber sealing rings, under the conditions of high burial depth and high soil cover, the burial depth of the pipe body 1 is too deep, and the resulting axial earth pressure may exceed the elastic limit of the rubber sealing rings. This can lead to excessive deformation at the joint of the socket end 101 and the spigot end 102, and in severe cases, it can even cause the seal at the joint of the socket end 101 and the spigot end 102 to fail.

[0040] Therefore, to solve the problem of pressure-bearing deformation in steel pipe structures, the steel pipe structure described in this embodiment of the application is provided with a pipe body 1, which includes a socket end 101 and a spigot end 102, with the socket end 101 and the spigot end 102 engaging. The socket end 101 is provided with prestressing tendons 2 spirally wound onto it. These prestressing tendons 2, together with the socket end 101, form a ribbed structure, effectively increasing the stiffness of the socket end 101. Furthermore, because the prestressing tendons 2 can undergo elastic deformation under external force, the socket end 101 also exhibits stronger resistance to deformation.

[0041] For example, when the pipe body 1 is subjected to excessive vertical and lateral earth pressure, the socket end 101, with its higher stiffness, can better withstand the local stress concentration caused by the excessive vertical and lateral earth pressure, thus giving the steel pipe structure higher stability and reliability. Furthermore, since the prestressing tendons 2 are spirally wound to the socket end 101, when greater vertical and lateral earth pressures cause local stress concentration, the prestressing tendons 2 can also transform the local stress concentration into uniformly distributed circumferential compressive stress, thereby effectively preventing the pipe body 1 from deflecting or undergoing radial deformation.

[0042] When the pipe body 1 is subjected to excessive axial earth pressure, the socket end 101, with its higher resistance to deformation, can better withstand the deformation caused by the excessive axial earth pressure, thereby effectively preventing the socket end 101 of the pipe body 1 from failing to seal. Furthermore, since the prestressing tendon 2 can also undergo elastic deformation under external force, the micro-displacement of the socket end 101 caused by excessive axial earth pressure can be adaptively adjusted by the prestressing tendon 2, thereby effectively preventing water leakage from the steel pipe structure due to sealing failure.

[0043] Furthermore, during long-term use of the steel pipe structure, since the prestressing tendons 2 are spirally wound to the socket end 101 and can undergo elastic deformation under external force, the prestressing tendons 2 can also compensate for and absorb the displacement of the socket end 101 caused by uneven settlement of the foundation, thereby effectively avoiding plastic deformation of the socket end 101.

[0044] Therefore, by providing prestressed tendons 2 spirally wound onto the socket end 101, this application effectively improves the stability and reliability of the steel pipe structure.

[0045] In this application, the prestressing tendon 2 may be provided as a single prestressing tendon, which is spirally wound to the socket end 101 to expose part of the socket end 101, or not to expose the socket end 101.

[0046] Of course, in other embodiments, the prestressing tendons 2 described in this application may also be provided in multiple forms, with the multiple prestressing tendons 2 spirally wound to the socket end 101, so as to expose part of the socket end 101, or not expose the socket end 101. Those skilled in the art can choose according to actual needs, and this application does not make specific limitations here.

[0047] In addition, it should be noted that the prestressing tendon 2 described in this application can undergo elastic deformation under the action of external force. Such external force may refer to the vertical earth pressure, lateral earth pressure or axial earth pressure on the prestressing tendon 2 under the working conditions of high burial depth and high soil cover; or, such external force may also refer to the force exerted by the socket end 101 on the prestressing tendon 2.

[0048] In one embodiment, the prestressed tendon 2 comprises at least one of steel wire and carbon fiber composite tendon.

[0049] Specifically, since steel wire has high stiffness and good elasticity, this application can further increase the stiffness and deformation resistance of the socket end 101 by setting the prestressing tendon 2 as steel wire, thereby further improving the stability and reliability of the steel pipe structure.

[0050] Furthermore, since carbon fiber composite reinforcement has higher stiffness, better elastic properties, and lighter weight, this application can further increase the stiffness and deformation resistance of the socket end 101 by setting the prestressing tendon 2 as carbon fiber composite reinforcement, thereby improving the stability and reliability of the steel pipe structure; and can also reduce the weight of the steel pipe structure, so that the steel pipe structure has a wider range of applications.

[0051] Of course, in other embodiments, the prestressed tendon 2 described in this application may also be made of other materials. Those skilled in the art can choose according to actual needs, and this application does not impose specific restrictions here.

[0052] In one embodiment, the axial length of the prestressing tendon 2 is greater than the axial length of the socket end 101.

[0053] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment of the application, the axial length of the prestressed tendon 2 is L2, and the axial length of the socket end 101 is L1.

[0054] Therefore, by setting the axial length L2 of the prestressing tendon 2 to be greater than the axial length L1 of the socket end 101, the prestressing tendon 2 can form a ribbed structure with higher stiffness together with the socket end 101, thereby further improving the stability and reliability of the steel pipe structure.

[0055] Furthermore, since the prestressing tendon 2 is spirally wound to the socket end 101, this application, by setting the axial length L2 of the prestressing tendon 2 to be greater than the axial length L1 of the socket end 101, also enables the prestressing tendon 2 to transform the local stress concentration into a uniformly distributed circumferential compressive stress when the socket end 101 is subjected to excessive vertical and lateral earth pressure, thereby effectively suppressing the elliptical deformation of the socket end 101 and further avoiding the problem of the pipe body 1 deflecting or undergoing radial deformation.

[0056] In one embodiment, the steel pipe structure further includes a protective layer 3, which can cover the prestressed tendons 2 to form a composite structural layer.

[0057] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment of the application, a protective layer 3 is provided on the side of the prestressing tendon 2 away from the socket end 101, and the protective layer 3 can cover the prestressing tendon 2 to form a composite structural layer, which effectively increases the stiffness of the socket end 101.

[0058] Since the prestressing tendons 2 in the composite structure layer are spirally wound to the socket end 101, after the protective layer 3 covers the prestressing tendons 2 to form the composite structure layer, the composite structure layer can also transform the local stress concentration caused by vertical earth pressure and lateral earth pressure into uniformly distributed circumferential compressive stress, thereby effectively suppressing the elliptical deformation of the socket end 101, and further avoiding the problem of the pipe body 1 deflecting or generating radial deformation.

[0059] In one embodiment, the protective layer 3 includes at least one of the following: a mortar layer, a three-layer polyethylene anti-corrosion coating, an epoxy resin powder coating, an epoxy coal tar coating, an epoxy resin fiberglass anti-corrosion layer, and a coal tar enamel coating.

[0060] Specifically, such as Figure 1 and Figure 2 As shown in the embodiment of this application, after the prestressing tendon 2 is spirally wound to the socket end 101, mortar can be sprayed on the side of the prestressing tendon 2 away from the socket end 101 to form a mortar layer. The mortar layer is a rigid protective layer, which enables the socket end 101 to have higher rigidity.

[0061] In addition, in other embodiments, to further improve the corrosion resistance and water vapor permeability resistance of the steel pipe structure, this application may further spray epoxy powder, adhesive and polyethylene sequentially on the side of the prestressing tendon 2 away from the socket end 101 to form a three-layer polyethylene anti-corrosion coating; or, this application may further spray epoxy resin powder on the side of the prestressing tendon 2 away from the socket end 101 to form an epoxy resin powder coating; or, this application may further spray epoxy coal tar on the side of the prestressing tendon 2 away from the socket end 101 to form an epoxy coal tar coating; or, this application may further spray epoxy resin and fiberglass cloth sequentially on the side of the prestressing tendon 2 away from the socket end 101 to form an epoxy resin fiberglass anti-corrosion layer; or, this application may further spray coal tar enamel on the side of the prestressing tendon 2 away from the socket end 101 to form a coal tar enamel coating.

[0062] Of course, in other embodiments, the protective layer 3 described in this application may also be made of other materials. Those skilled in the art can choose according to actual needs, and this application does not impose specific restrictions here.

[0063] In one embodiment, the socket end 102 is provided with a first groove 10201 and a second groove 10202; the steel pipe structure further includes a first sealing ring 4 and a second sealing ring 5, the first sealing ring 4 being disposed in the first groove 10201 and the second sealing ring 5 being disposed in the second groove 10202.

[0064] Specifically, such as Figure 1 and Figure 2 As shown, the pipe body 1 in this embodiment of the application also includes a main body 103. The two opposite ends of the main body 103 are a socket end 101 and a spigot end 102, and the socket ends 101 and spigot ends 102 of the multiple pipe bodies 1 are interlocked to form the steel pipe structure.

[0065] In this application, the socket end 102 is further provided with a first groove 10201 and a second groove 10202. The first groove 10201 is used to accommodate the first sealing ring 4, and the second groove 10202 is used to accommodate the second sealing ring 5. Thus, by providing the first sealing ring 4 and the second sealing ring 5, this application effectively improves the sealing performance between the socket end 101 and the socket end 102.

[0066] In one embodiment, the socket end 101 includes a first stop section 1011, a second stop section 1012, and a connecting section 1013, wherein the connecting section 1013 is disposed between the first stop section 1011 and the second stop section 1012; the insertion end 102 further includes a first protrusion 1021 and a second protrusion 1022, wherein the first protrusion 1021 engages with the second stop section 1012 for a stop, and the second protrusion 1022 engages with the first stop section 1011 for a stop.

[0067] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment of the application, the socket end 101 is provided with a first stop section 1011, a second stop section 1012, and a connecting section 1013 disposed between the first stop section 1011 and the second stop section 1012. The connecting section 1013 is used to engage with the spigot end 102 to realize the connection between multiple pipe bodies 1. The first stop section 1011 is disposed on the side of the socket end 101 away from the main body 103, and the diameter of the first stop section 101 gradually increases from the main body 103 toward the socket end 101. The second stop section 1012 is disposed on the side of the socket end 101 close to the main body 103, and the diameter of the second stop section 1012 gradually decreases from the main body 103 toward the socket end 101.

[0068] The socket end 102 also includes a first protrusion 1021 and a second protrusion 1022. The first protrusion 1021 can form a stop engagement with the second stop section 1012, and the second protrusion 1022 can form a stop engagement with the first stop section 1011.

[0069] Therefore, this application effectively improves the assembly efficiency of the steel pipe structure through the stop cooperation between the first protrusion 1021 and the second stop section 1012, and the stop cooperation between the second protrusion 1022 and the first stop section 1011.

[0070] In one embodiment, the socket end 102 further includes a third protrusion 1023 and a fourth protrusion 1024. A first groove 10201 is formed between the first protrusion 1021 and the third protrusion 1023, a second groove 10202 is formed between the third protrusion 1023 and the fourth protrusion 1024, and a third groove 10203 is formed between the second protrusion 1022 and the fourth protrusion 1024. The depth of the third groove 10203 is less than the depth of the first groove 10201; or, the depth of the third groove 10203 is less than the depth of the second groove 10202.

[0071] Specifically, such as Figure 2 As shown in the embodiment of this application, the socket end 102 is provided with a first protrusion 1021, a third protrusion 1023, a fourth protrusion 1024, and a second protrusion 1022 in sequence from the socket end 102 toward the main body 103. A first groove 10201 for accommodating the first sealing ring 4 is formed between the first protrusion 1021 and the third protrusion 1023, and a second groove 10202 for accommodating the second sealing ring 5 is formed between the third protrusion 1023 and the fourth protrusion 1024. The first sealing ring 4 and the second sealing ring 5 can form a double seal for the steel pipe structure, thereby further preventing water leakage from the steel pipe structure. A third groove 10203 for guiding the socket end 101 and the socket end 102 to engage and cooperate is formed between the second protrusion 1022 and the fourth protrusion 1024, thereby effectively improving the assembly efficiency of the steel pipe structure.

[0072] In this application, the depth of the first groove 10201 is D1, the depth of the second groove 10202 is D2, and the depth of the third groove 10203 is D3.

[0073] Therefore, by setting the depth D3 of the third groove 10203 to be less than the depth D1 of the first groove 10201; or by setting the depth D3 of the third groove 10203 to be less than the depth D2 of the second groove 10202, the third groove 10203 can better guide the socket end 101 and the spigot end 102 to engage, thereby further improving the assembly efficiency of the steel pipe structure.

[0074] In one embodiment, the distance between the first protrusion 1021 and the bottom wall of the first groove 10201 is less than the distance between the third protrusion 1023 and the bottom wall of the first groove 10201.

[0075] Specifically, such as Figure 2 As shown, in this embodiment of the application, the distance between the first protrusion 1021 and the bottom wall of the first groove 10201 is h1, and the distance between the third protrusion 1023 and the bottom wall of the first groove 10201 is h2.

[0076] Therefore, by setting the distance h1 between the first protrusion 1021 and the bottom wall of the first groove 10201 to be smaller than the distance h2 between the third protrusion 1023 and the bottom wall of the first groove 10201, this application effectively reduces the insertion and extraction resistance when the socket end 101 and the insertion end 102 are engaged.

[0077] Furthermore, by setting the distance h1 between the first protrusion 1021 and the bottom wall of the first groove 10201 to be smaller than the distance h2 between the third protrusion 1023 and the bottom wall of the first groove 10201, this application can also enable the first protrusion 1021 and the first sealing ring 4 to form a first sealing structure, and enable the third protrusion 1023 and the first sealing ring 4 to form a second sealing structure. Thus, this application further improves the sealing performance of the steel pipe structure through the double sealing of the first sealing structure and the second sealing structure.

[0078] In one embodiment, the first sealing ring 4 is a rubber ring; the second sealing ring 5 is a rubber ring.

[0079] Specifically, such as Figure 2 As shown, in this embodiment of the application, by setting both the first sealing ring 4 and the second sealing ring 5 as rubber rings, when the socket end 101 and the spigot end 102 are engaged, the compressive reaction force of the rubber ring can further tighten the prestressing tendon 2, thereby forming a pressure-seal positive feedback between the prestressing tendon 2 and the first sealing ring 4, and between the prestressing tendon 2 and the second sealing ring 5, thereby further improving the sealing reliability of the steel pipe structure.

[0080] The material of the rubber ring can be any one of natural rubber, nitrile rubber, EPDM rubber, fluororubber, chloroprene rubber, butyl rubber, or polyurethane rubber. Those skilled in the art can choose according to actual needs, and this application does not impose specific restrictions.

[0081] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0082] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A steel pipe structure, characterized in that, include: The pipe body (1) includes a socket end (101) and a spigot end (102), wherein the socket end (101) and the spigot end (102) are engaged in a snap-fit ​​relationship; The prestressing tendon (2) is at least one of the prestressing tendons (2) spirally wound to the socket end (101), and the prestressing tendon (2) can generate elastic deformation under the action of external force.

2. The steel pipe structure according to claim 1, characterized in that, The prestressed tendon (2) includes at least one of steel wire and carbon fiber composite tendon.

3. The steel pipe structure according to claim 1, characterized in that, The axial length of the prestressed tendon (2) is greater than the axial length of the socket end (101).

4. The steel pipe structure according to claim 1, characterized in that, It also includes a protective layer (3) that can cover the prestressed tendons (2) to form a composite structural layer.

5. The steel pipe structure according to claim 4, characterized in that, The protective layer (3) includes at least one of the following: mortar layer, three-layer polyethylene anti-corrosion coating, epoxy resin powder coating, epoxy coal tar coating, epoxy resin fiberglass anti-corrosion layer and coal tar enamel coating.

6. The steel pipe structure according to claim 1, characterized in that, The socket end (102) is provided with a first groove (10201) and a second groove (10202); It also includes a first sealing ring (4) and a second sealing ring (5), the first sealing ring (4) being disposed in the first groove (10201) and the second sealing ring (5) being disposed in the second groove (10202).

7. The steel pipe structure according to claim 6, characterized in that, The socket end (101) includes a first stop section (1011), a second stop section (1012), and a connecting section (1013), wherein the connecting section (1013) is disposed between the first stop section (1011) and the second stop section (1012); The socket end (102) further includes a first protrusion (1021) and a second protrusion (1022), the first protrusion (1021) and the second stop section (1012) are engaged in a stop-stopping action, and the second protrusion (1022) and the first stop section (1011) are engaged in a stop-stopping action.

8. The steel pipe structure according to claim 7, characterized in that, The socket end (102) further includes a third protrusion (1023) and a fourth protrusion (1024), wherein a first groove (10201) is formed between the first protrusion (1021) and the third protrusion (1023), a second groove (10202) is formed between the third protrusion (1023) and the fourth protrusion (1024), and a third groove (10203) is formed between the second protrusion (1022) and the fourth protrusion (1024). Wherein, the depth of the third groove (10203) is less than the depth of the first groove (10201); or, the depth of the third groove (10203) is less than the depth of the second groove (10202).

9. The steel pipe structure according to claim 8, characterized in that, The distance between the first protrusion (1021) and the bottom wall of the first groove (10201) is less than the distance between the third protrusion (1023) and the bottom wall of the first groove (10201).

10. The steel pipe structure according to claim 6, characterized in that, The first sealing ring (4) is a rubber ring; the second sealing ring (5) is a rubber ring.

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