Concrete pipe

Abstract

The present application discloses a concrete pipe. The concrete pipe includes: at least one pipe body extending in a first direction, the pipe body including a socket end and a lining plate, the socket end being located at an end of the pipe body along the first direction, the lining plate being located inside the socket end, the lining plate including an inner wall surface, and the inner wall surface being provided with a sealing groove and a positioning groove; at least one sealing ring, the sealing ring being located inside the lining plate, at least part of the sealing ring being coupled with the sealing groove, at least part of the sealing ring being coupled with the positioning groove, and at least part of the sealing ring protruding relative to the inner wall surface. In the present application, a lining plate is provided inside the socket end, and a sealing groove and a positioning groove are provided on the lining plate. The structural strength of the lining plate can compensate for the problem of poor strength of the socket end of the concrete pipe, thereby reducing the risk of deformation of the sealing groove and the positioning groove, and further reducing the possibility of the sealing ring rolling. By preventing the sealing ring from rolling and sliding, the sealing effect is improved, the reliability of the positioning of the sealing ring is increased, and at the same time, the sealing between the sealing ring and the socket is achieved.

Description

Technical Field

[0001] This application relates to the technical field of concrete pipes and socket joints, and particularly to a concrete pipe. Background Art

[0002] Concrete pipes are used to convey water over long distances with large flow rates. When two concrete pipes are plugged together, in order to ensure good sealing at the connection of the concrete pipes, a sealing ring is usually provided. During plugging, the sealing ring is sleeved outside the socket end and inserted into the spigot end together. Under the combined action of the socket end and the spigot end, the sealing ring will roll or slide between them, and even slip out of the limiting step of the sealing groove, resulting in sealing failure. Summary of the Invention

[0003] The embodiments of this application provide a concrete pipe, which can reduce the risk that the sealing ring affects the sealing of the concrete pipe due to sliding or rolling.

[0004] On the one hand, the embodiments of this application provide a concrete pipe, including: at least one pipe body extending along a first direction, the pipe body including a spigot end and a lining plate, the spigot end being located at the end of the pipe body along the first direction, the lining plate being located inside the spigot end, the lining plate including an inner wall surface, the inner wall surface being provided with a sealing groove and a positioning groove; at least one sealing ring, the sealing ring being located inside the lining plate, at least part of the sealing ring being coupled with the sealing groove, at least part of the sealing ring being coupled with the positioning groove, and at least part of the sealing ring protruding relative to the inner wall surface.

[0005] According to an embodiment of one aspect of this application, the sealing ring includes a sealing body, at least part of the sealing body being coupled with the sealing groove, a conical structure being provided inside the sealing body, and the inner diameter of the conical structure gradually decreasing along the direction away from the end of the spigot end.

[0006] According to an embodiment of one aspect of this application, the sealing ring further includes a positioning portion, at least part of the positioning portion being coupled with the positioning groove.

[0007] According to an embodiment of one aspect of this application, the inner wall surface is further provided with a protruding portion, the protruding portion being located between the sealing groove and the positioning groove; the sealing ring further includes a recessed portion, the recessed portion being coupled with the protruding portion.

[0008] According to an embodiment of one aspect of this application, the sealing ring further includes a skeleton, the skeleton being arranged circumferentially along the sealing ring within the positioning portion, and the skeleton being located within the space formed by the positioning groove.

[0009] According to an embodiment of one aspect of this application, the cross-sectional shape of the positioning groove is trapezoidal, and along the axial direction of the pipe body, the width of the bottom of the positioning groove is smaller than the width of the positioning portion.

[0010] According to an embodiment of one aspect of this application, the cross-sectional shape of the sealing groove is rectangular.

[0011] According to an embodiment of one aspect of the present application, the positioning groove is located on one side of the end of the sealing groove close to the socket end.

[0012] According to an embodiment of one aspect of the present application, the minimum inner diameter of the inner wall surface of the lining plate is equal to the inner diameter of the socket end.

[0013] According to an embodiment of one aspect of the present application, the number of pipe bodies is at least two, and the at least two pipe bodies are sequentially inserted; the pipe body further includes a spigot end, and the spigot end is located at one end of the pipe body away from the socket end along the first direction; among the two inserted pipe bodies, the spigot end of one pipe body is inserted into the socket end of the other pipe body, and the inner side of the sealing ring at the socket end abuts against the outer side of the spigot end.

[0014] According to an embodiment of one aspect of the present application, the spigot end is provided with a stepped diameter structure, and the outer diameter of the stepped diameter structure gradually increases along the direction from the spigot end to the socket end.

[0015] According to an embodiment of one aspect of the present application, the material stiffness of the lining plate is greater than or equal to that of steel; the lining plate is prefabricated inside the socket end.

[0016] The concrete pipe provided by the embodiment of the present application is provided with a lining plate inside the socket end, and a sealing groove and a positioning groove are arranged on the lining plate. The structural strength of the lining plate can make up for the problem of poor structural strength of the socket end of the concrete pipe, thereby reducing the risk of deformation of the sealing groove and the positioning groove, and further reducing the possibility of the sealing ring rolling. In addition, the positioning groove can fix the position of the sealing ring relative to the concrete pipe and reduce the possibility of the sealing ring sliding. By reducing the risks of the sealing ring rolling and sliding, the embodiment of the present application can improve the sealing effect and the reliability of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the concrete pipe of the embodiment of the present application.

[0019] Figure 2 For Figure 1 The cross-sectional view of the concrete pipe in A-A of

[0020] Figure 3 It is a schematic structural diagram of the sealing ring of the concrete pipe of the embodiment of the present application.

[0021] Figure 4 It is a schematic cross-sectional view of the lining plate of the concrete pipe of the embodiment of the present application.

[0022] Figure 5 This is a schematic structural diagram when multiple pipe bodies of the concrete pipe according to the embodiments of the present application are inserted into each other.

[0023] Figure 6 This is a schematic cross-sectional view of the sealing ring of the concrete pipe according to the embodiments of the present application.

[0024] Reference numerals:

[0025] 1, pipe body; 11, socket end; 12, lining plate; 121, sealing groove; 122, positioning groove; 13, spigot end;

[0026] 2, sealing ring; 21, sealing body; 211, first side; 212, second side; 213, third side; 214, eighth side; 22, positioning portion; 221, fourth side; 222, fifth side; 223, sixth side; 23, skeleton; 24, recessed portion; 241, seventh side. Detailed implementation manners

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The description of the embodiments below is only intended to provide a better understanding of the present application by showing examples of the present application.

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The embodiments will be described in detail below with reference to the drawings.

[0029] Relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device including the said elements.

[0030] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" the other layer or region.

[0031] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0032] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0033] The applicant discovered that when using concrete pipes, multiple sections are typically prefabricated, each with a socket end at one end and a spigot end at the other. These sections are then connected sequentially, with the spigot end of one section inserted into the socket end of an adjacent concrete pipe. To ensure a tight seal at the joint, a sealing ring is placed between the spigot end and the socket end. The sealing ring is first placed over the spigot end, and then the spigot end and the socket end are joined. However, during connection, since the sealing ring's cross-section is typically circular, forming a cylindrical or conical shape, the relative movement between the socket and spigot ends can cause the sealing ring to roll. During connection, the elastically elongated sealing ring can overshoot the stopper under the reaction force of the socket end, preventing it from entering the socket end as intended. This can damage the sealing ring. Even if the sealing ring is not damaged, it can prevent it from adhering closely to the inner and outer walls of the socket and spigot ends, resulting in seal failure of the concrete pipe. Therefore, in actual construction, the traditional concrete bell-and-spigot pipe sealing method has a high probability of seal failure.

[0034] In view of the above problems, an embodiment of the present application provides a concrete pipe, in which one end of the pipe body is a socket end, a lining plate is provided on the inner side of the socket end, and a sealing groove and a positioning groove are provided on the lining plate. By providing a lining plate with higher structural strength, the problem of poor structural strength of the socket end of the concrete pipe can be compensated, thereby reducing the risk of deformation and cracking of the sealing groove and the positioning groove by the plug, and further reducing the possibility of failure of the sealing ring due to rolling or sliding. In addition, the positioning groove can fix the position of the sealing ring relative to the concrete pipe, reducing the possibility of sliding or rolling of the sealing ring. By reducing the risk of rolling and sliding of the sealing ring, the embodiment of the present application can improve the sealing effect and sealing reliability, and has anti-retraction and self-locking functions.

[0035] Example 1

[0036] Figure 1 This is a schematic structural view of a concrete pipe according to an embodiment of the present application. Figure 2 It is Figure 1 a cross-sectional view of the A-A section of the concrete pipe in Figure 3 This is a schematic structural view of a sealing ring of the concrete pipe according to an embodiment of the present application. Figure 4 This is a schematic cross-sectional view of a lining plate of the concrete pipe according to an embodiment of the present application.

[0037] Please refer to Figures 1 to 4 , the embodiment of the present application provides a concrete pipe, including: at least one pipe body 1 extending along a first direction, the pipe body 1 includes a socket end 11 and a lining plate 12, the socket end 11 is located at an end of the pipe body 1 along the first direction, the lining plate 12 is located inside the socket end 11, the lining plate 12 includes an inner wall surface, and the inner wall surface is provided with a sealing groove 121 and a positioning groove 122; at least one sealing ring 2, the sealing ring 2 is located inside the lining plate 12, at least part of the sealing ring 2 is coupled with the sealing groove 121, at least part of the sealing ring 2 is coupled with the positioning groove 122, and at least part of the sealing ring 2 protrudes relative to the inner wall surface.

[0038] It should be noted that the cross-sectional shape of the concrete pipe in the embodiment of the present application along the vertical circumferential direction can be circular or polygonal. In the embodiment of the present application, the circular shape is taken as an example for illustration.

[0039] The pipe body 1 can be prefabricated and made first. When installing the concrete pipe, the sealing ring 2 is installed inside the socket end 11 of the prefabricated pipe body 1. Insert the insertion object into the socket end 11 to achieve connection. The insertion object can be other pipelines or other pipe bodies 1 of the concrete pipe. The pipe body 1 is made by pouring concrete. When pouring concrete, the lining plate 12 is arranged at the position inside the socket end 11, so that the lining plate 12 is located inside the socket end 11 of the pipe body 1 after being formed. The lining plate 12 is made of a material with greater structural strength, so as to reduce the risk of deformation or cracking of the sealing groove 121, make up for the defect of poor local strength of the socket end of the concrete pipe, and further reduce the possibility of the sealing ring 2 detaching from the sealing groove 121 due to rolling or sliding, ensuring the sealing effect of the concrete pipe in the embodiment of the present application.

[0040] A sealing groove 121 is provided on the inner wall surface of the lining plate 12, and a part of the sealing ring 2 is coupled with the sealing groove 121, so as to ensure the sealing effect of the sealing ring 2 on the insertion part. A positioning groove 122 is also provided on the inner wall surface of the lining plate 12, and a part of the sealing ring 2 is coupled with the positioning groove 122. Even when the insertion object is inserted into the socket end 11 and the sealing ring 2 is subjected to a shear moment, since a part of the sealing ring 2 is coupled with the positioning groove 122, the possibility of the sealing ring 2 rolling or sliding can be reduced, thereby ensuring a good sealing effect. When the insertion object is inserted into the socket end 11, at least part of the sealing ring 2 protrudes relative to the inner wall surface, so that the protruding part of the sealing ring 2 relative to the inner wall surface can abut against the insertion object, thereby achieving the purpose of sealing.

[0041] When the insertion object is inserted into the socket end 11, the protruding part of the sealing ring 2 relative to the inner wall surface is acted on by the insertion object, deforms, and bends in the direction away from the socket end 11. After the insertion object is completely inserted into the socket end 11, if there is a tendency for the insertion object to withdraw under the action of an external force, the protruding part of the sealing ring 2 relative to the inner wall surface has already deformed and will have a tendency to recover deformation, so that the sealing ring 2 is further pressed, thereby generating a greater frictional resistance to prevent the insertion object from withdrawing from the socket end 11, that is, the self-locking function after insertion is realized.

[0042] Further, referring continuously to Figures 1 to 4 , the sealing ring 2 includes a sealing body 21, at least part of the sealing body 21 is coupled with the sealing groove 121, and a tapered structure is provided inside the sealing ring 2, and the inner diameter of the tapered structure gradually decreases along the end direction away from the socket end 11.

[0043] When the insertion object is inserted into the tube body 1, at least part of the sealing body 21 of the sealing ring 2 is coupled with the sealing groove 121, and the sealing between the sealing ring 2 and the socket end 11 can be realized. A tapered structure is provided inside the sealing ring 2, and the inner diameter of the tapered structure gradually decreases along the end direction away from the socket end 11, which can play an alignment role during insertion. When the connecting object is inserted into the tube body 1, the insertion object will be inserted from the end with a larger inner diameter of the tapered structure. Through the guiding and alignment of the tapered structure, the axis of the insertion object coincides with the axis of the tube body 1, achieving the purpose of alignment, thereby reducing the difference in the forces received by each part of the sealing ring 2 along the circumference of the tube body 1, further reducing the possibility of the sealing ring 2 failing due to uneven stress, and thus enhancing the sealing effect.

[0044] Further, referring continuously to Figures 1 to 4 , the sealing ring 2 further includes a positioning portion 22, and at least part of the positioning portion 22 is coupled with the positioning groove 122. The positioning portion 22 is used to fix the position of the sealing ring 2 relative to the lining plate 12, especially to reduce the possibility of the sealing ring 2 sliding relative to the lining plate 12, thereby reducing the risk of sealing failure caused by the sealing ring 2 disengaging from the sealing groove 121.

[0045] Further, continue to refer to Figures 1 to 4 , the inner wall surface is further provided with a protruding portion, and the protruding portion is located between the sealing groove 121 and the positioning groove 122; the sealing ring 2 further includes a recessed portion 24, and the recessed portion 24 is coupled with the protruding portion. The coupling of the protruding portion and the recessed portion 24 can further reduce the possibility of the sealing ring 2 sliding relative to the lining plate 12. In addition, when the sealing ring 2 is subjected to a shearing moment, the protruding portion and the recessed portion 24 are coupled, and the positioning portion 22 and the positioning groove 122 are coupled, so that the lining plate 12 can apply a moment in the opposite direction to the sealing ring 2, reducing the possibility of the sealing ring 2 rolling relative to the lining plate 12 and reducing the risk of sealing failure caused by the sealing ring 2 disengaging from the sealing groove 121.

[0046] Further, continue to refer to Figures 1 to 4 , the sealing ring 2 further includes a skeleton 23, and the skeleton 23 is arranged in the positioning portion 22 along the circumferential direction of the sealing ring 2, and the skeleton 23 is located in the space formed by the positioning groove 122. The skeleton 23 is used to support the sealing ring 2 so that the sealing ring 2 is in an unfolded state. It should be noted that the skeleton 23 can be made of a rigid material in a compressed state, applying a radially outward acting force on the sealing ring 2 so that the sealing ring 2 is in an outwardly expanded state. If the sealing ring 2 slides or rolls relative to the lining plate 12, the positioning portion 22 will disengage from the positioning groove 122. Since the skeleton 23 is located in the space formed by the positioning groove 122, the tension of the skeleton 23 itself can prevent the positioning portion 22 from disengaging from the positioning groove 122, thereby reducing the possibility of the sealing ring 2 sliding or rolling relative to the lining plate 12, and further enhancing the sealing effect.

[0047] Further, continue to refer to Figures 1 to 4 , the positioning groove 122 is located on one side of the end of the sealing groove 121 close to the socket end 11; the skeleton 23 of the sealing ring 2 is located in the positioning groove 122, and the tension of the skeleton 23 can keep the sealing body 21 in the sealing groove 121, preventing the sealing body 21 from disengaging from the sealing groove 121 and achieving the first seal between the sealing ring 2 and the socket end 11.

[0048] In addition, when the plugging object is plugged into the pipe body 1, since the positioning groove 122 is located on one side of the end of the sealing groove 121 close to the socket end 11, the positioning groove 122 can apply a moment to the sealing ring 2 to hinder its rotation, so the possibility of the sealing ring 2 rolling relative to the lining plate 12 can be reduced. In addition, the maximum inner diameter of the positioning groove 122 is greater than the maximum inner diameter of the sealing groove 12, which can increase the lever arm of the positioning groove 122 applying a moment to the positioning portion 22, thereby reducing the magnitude of the force applied by the positioning groove 122 to the positioning portion 22, and thus reducing the possibility of the sealing ring 2 failing due to excessive force.

[0049] Further, continue to refer to Figure 4, the cross-sectional shape of the positioning groove 122 is trapezoidal, and the side corresponding to the end face near the socket end 11 is the hypotenuse of the trapezoid; in the uncompressed state, the cross-sectional shape of at least part of the positioning portion 22 is semi-circular. Since the cross-section of the positioning groove 122 is trapezoidal and the side corresponding to the end face near the socket end 11 is a hypotenuse of the trapezoid, when installing the sealing ring 2, the sealing ring 2 can be first inserted obliquely into the positioning groove 122 through the corresponding hypotenuse, and then the sealing ring 2 is rotated so that the positioning portion 22 is coupled with the positioning groove 122 and the sealing body 21 is coupled with the sealing groove 121. The other side can reduce the possibility of the positioning portion 22 sliding out of the positioning groove 122. When the insertion object is inserted into the pipe body 1, the sealing ring 2 is squeezed, the positioning portion 22 deforms, and the positioning portion 22 with a semi-circular cross-sectional shape can be coupled with the positioning groove 122 with a right trapezoidal cross-sectional shape, which can also play a sealing role. In addition, the bottom width of the positioning groove 122 along the axial direction of the socket end 11 is smaller than the width of the positioning portion 22. The trapezoidal cross-sectional shape can make the positioning portion 22 easier to enter the positioning groove 122, and the slightly smaller bottom width of the positioning groove 122 can make the positioning portion 22 more difficult to slide out of the positioning groove 122, squeezing the positioning portion 22 into the positioning groove 122 to provide an additional guarantee for sealing.

[0050] Further, continue to refer to Figure 4 , the cross-sectional shape of the sealing groove 121 is rectangular; in the uncompressed state, the cross-sectional shape of at least part of the sealing body 21 is semi-circular. The sealing groove 121 with a rectangular cross-sectional shape can reduce the possibility of the sealing body 21 separating from the sealing groove 121, thus ensuring a good sealing effect. Since the maximum inner diameter of the positioning groove 122 is larger than the maximum inner diameter of the sealing groove 121, the sealing groove 121 with a rectangular cross-sectional shape will not have an obvious impact on the installation of the sealing ring 2. When the insertion object is inserted into the pipe body 1, the sealing ring 2 is squeezed, the sealing body 21 deforms, and the sealing body 21 with a semi-circular cross-sectional shape can be coupled with the rectangular rice groove to ensure the sealing effect.

[0051] When assembling the sealing ring 2 inside the socket end 11, first assemble a part of the positioning portion 22 into the positioning groove 122. Then, at a point in the circumferential direction of the sealing ring 2, push the sealing ring 2 to make the sealing ring 2 eccentric with the socket end 11. At this time, the sealing ring 2 at this point is coupled with the lining plate 12. Then, starting from this point along the circumferential direction of the sealing ring 2, gradually tap the sealing ring 2 so that the other parts of the sealing ring 2 are also coupled with the lining plate 12 until all parts of the sealing ring 2 in the circumferential direction are coupled with the lining plate 12 and the sealing ring 2 is coaxial with the socket end 11, completing the assembly of the sealing ring 2 and the socket end 11. The diameter of the skeleton 23 of the sealing ring 2 is larger than the minimum diameter of the lining plate 12, so that the skeleton 23 is also located in the positioning groove 122.

[0052] Further, continue to refer to Figures 1 to 4, the minimum inner diameter of the inner wall surface of the liner 12 is equal to the inner diameter of the socket end 11, so that a complete cylindrical surface can be formed between the inner wall surface of the liner 12 and the inner side of the socket end 11, enabling the insertion object to smoothly insert into the socket end 11 and preventing the liner 12 from interfering with the insertion of the insertion object.

[0053] Figure 5 It is a schematic structural diagram when multiple pipe bodies of the concrete pipe in the embodiment of the present application are inserted.

[0054] Further, referring to Figure 5 , the number of the pipe bodies 1 is at least two, and at least two pipe bodies 1 are inserted in sequence; the pipe body 1 further includes a spigot end 13, and the spigot end 13 is located at one end of the pipe body 1 away from the socket end 11 along the first direction; among the two inserted pipe bodies 1, the spigot end 13 of one pipe body 1 is inserted into the socket end 11 of the other pipe body 1, and the inner side of the sealing ring 2 of the socket end 11 abuts against the outer side of the spigot end 13.

[0055] When multiple pipe bodies 1 are inserted in sequence, one end of the pipe body 1 is the socket end 11 and the other end is the spigot end 13. Among the two inserted pipe bodies 1, the spigot end 13 of one is inserted into the socket end 11 of the other. At this time, the sealing body 21 of the sealing ring 2 abuts against the outer wall surface of the spigot end 13 to achieve the seal between the two pipe bodies 1. When the two pipe bodies 1 are inserted in place, the sealing ring 2 is in a compressed state, and the sealing body 21 applies pressure to the outer wall surface of the spigot end 13 to achieve the seal between the sealing ring 2 and the outer wall surface of the spigot end 13. Exemplarily, the whole pipe body 1 of the concrete pipe can be a bent pipe or a straight pipe. When the pipe body 1 is a bent pipe, the inserted parts of the socket end 11 and the spigot end 13 are both straight pipes.

[0056] A chamfer structure is provided on the outer side of the spigot end 13 so that there are no obvious sharp edges on the outer side of the spigot end 13. When the spigot end 13 and the socket end 11 are inserted in place, the sealing ring 2 will be compressed by the spigot end 13 and the socket end 11. Therefore, when the spigot end 13 is inserted into the socket end 11, the outer edge of the spigot end 13 will slide over part of the surface of the sealing body 21. The chamfer structure can reduce the risk of the outer edge of the spigot pipe scratching the surface of the sealing body 21 and has a guiding effect to enable the sealing body 21 to have good sealing performance. After chamfering, the diameter of the end face edge of the spigot end 13 should be less than or equal to the inner diameter of the sealing ring 2.

[0057] Further, the spigot end 13 is provided with a stepped diameter structure, and the outer diameter of the stepped diameter structure gradually increases along the direction from the spigot end 13 to the socket end 11. Therefore, the outer edge of the spigot end 13 forms a cone, which is convenient for the spigot end 13 to insert into the socket end 11. When the spigot end 13 and the socket end 11 are inserted and combined, it can prevent the conical edge from damaging the sealing ring 2, thus ensuring good sealing effect.

[0058] Further, the material stiffness of the lining plate is greater than or equal to that of steel, and it can be an alloy or organic polymer material with relatively high structural stiffness. When manufacturing the concrete pipe of the embodiment of the present application, the lining plate is prefabricated inside the socket end 11 and directly cast into the socket end 11, which can effectively prevent leakage between the lining plate and the concrete pipe and prevent the risk of the socket end 11 of the concrete pipe from being cracked by the spigot end 13 and the sealing ring 2.

[0059] Embodiment 2

[0060] Figure 6 It is a schematic cross-sectional view of the sealing ring of the concrete pipe of the embodiment of the present application.

[0061] Continue to refer to Figure 2 and Figure 3 and in combination with Figure 6 The sealing ring 2 provided by the embodiment of the present application is used for the concrete pipe in Embodiment 1 of the present application.

[0062] The embodiment of the present application provides a sealing ring 2, including: a sealing body 21, at least part of the sealing body 21 extends radially outward along the sealing ring 2; a positioning part 22, connected to the sealing body 21 along the axial direction of the sealing ring 2, at least part of the positioning part 22 extends radially outward along the sealing ring 2; the inner diameter of the positioning part 22 is smaller than the inner diameter of the sealing body 21; an annular skeleton 23 is located inside the positioning part 22.

[0063] When using the sealing ring 2 of the embodiment of the present application in the embodiment of the present application, the sealing ring 2 is installed inside the socket end 11 of the pipe body 1 of the concrete pipe, and then the spigot end 13 of another pipe body 1 is inserted, and the sealing between the two pipe bodies 1 is realized through the sealing ring 2.

[0064] The sealing body 21 is used to achieve the sealing effect of the sealing ring 2 and extends radially along the sealing ring 2, which can enable the sealing ring 2 to be coupled with the sealing groove 121 of the socket end 11 of the pipe body 1 to achieve the purpose of sealing. The positioning part 22 is used to fix the position of the sealing ring 2 relative to the socket end 11 and extends radially along the sealing ring 2, which can reduce the possibility of the sealing ring 2 rolling or sliding relative to the socket end 11, thereby enhancing the sealing effect. The annular skeleton 23 can support the sealing ring 2, reduce the possibility of the positioning part 22 disengaging from the positioning groove 122, and at the same time, under the action of the outward tension of the skeleton 23, there is a radially outward acting force on the positioning part 22, pressing the positioning part 22 in the positioning groove 122 to further enhance the sealing effect.

[0065] Further, continue to refer to Figure 6, a conical structure is provided on the inner side of the sealing ring 2, and the inner diameter of the conical structure gradually increases along the axial direction of the sealing ring 2. The conical structure on the inner side of the sealing ring 2 can play a role in alignment. When the socket end 13 is inserted into the socket end 11, the socket end 13 will be inserted into the socket end 11 under the guidance of the conical side of the conical structure. At this time, the axis of the socket end 13 coincides with the axis of the socket end 11, achieving the purpose of alignment, reducing the difference in the acting forces received by the sealing ring 2 at various positions in the circumferential direction of the sealing ring 2, and thus reducing the possibility of the sealing ring 2 failing due to uneven force.

[0066] Further, continue to refer to Figure 6 , along the axial direction of the sealing ring 2, from the positioning portion 22 to the sealing body 21 direction, the inner diameter of the conical structure gradually decreases. When the socket end 13 is inserted into the socket end 11, the sealing ring 2 is subjected to a moment generated by the combined action of the socket end 13 and the socket end 11, and there is a risk of rolling. The positioning portion 22 is arranged on the side with a larger inner diameter of the conical structure, and the positioning portion 22 interacts with the positioning groove 122 of the socket end 11 to generate a moment that hinders the rotation of the sealing ring 2. Therefore, the risk of the sealing ring 2 rolling relative to the socket end 11 can be reduced, and the sealing effect can be improved.

[0067] Further, the diameter of the skeleton 23 in the positioning portion 22 of the sealing ring 2 is larger than the minimum diameter of the lining plate 12. The radially outward tension of the rigid skeleton 23 enables the positioning portion 22 to be effectively fixed in the positioning groove 122 of the sealing ring 2, effectively resisting the axial thrust during the plugging process.

[0068] Further, continue to refer to Figure 6, the cross-sectional shape of the sealing body 21 includes a first side 211, a second side 212 extending radially along the sealing ring 2, and a third side 213. The second side 212, the first side 211, and the third side 213 are connected in sequence. The first side 211 is a convex curve; the diameters of the sealing body 21 corresponding to the second side 212 and the third side 213 are both smaller than the diameter of the sealing body 21 corresponding to the first side 211. The second side 212, the first side 211, and the third side 213 are connected in sequence, corresponding to a part of the cross-sectional shape of the sealing body 21. On the sealing body 21, the parts corresponding to the second side 212, the first side 211, and the third side 213 are coupled with the sealing groove 121 of the socket end 11. The diameters of the sealing body 21 corresponding to the second side 212 and the third side 213 are both smaller than the diameter of the sealing body 21 corresponding to the first side 211. The parts corresponding to the second side 212 and the third side 213 ensure that the sealing body 21 can extend radially outward along the sealing ring 2. The first side 211 is a convex curve. Exemplarily, it can be an arc or an elliptical arc, so that the sealing body 21 can be coupled with the sealing groove 121 of the socket end 11 under a certain external force. Although the first side 211 is a convex curve, after the spigot end 13 is inserted into the socket end 11, the sealing body 21 is squeezed and deformed, and the part corresponding to the first side 211 can be more closely coupled with the sealing groove 121 to ensure the sealing effect.

[0069] Further, continue to refer to Figure 6 , the cross-sectional shape of the positioning portion 22 includes a fourth side 221, a fifth side 222 extending radially along the sealing right, and a sixth side 223. The fifth side 222, the fourth side 221, and the sixth side 223 are connected in sequence. The fourth side 221 is a convex curve. The fifth side 222, the fourth side 221, and the sixth side 223 are connected in sequence, corresponding to a part of the cross-sectional shape of the positioning portion 22. On the positioning portion 22, the distance between the fifth side 222 and the sixth side 223 is greater than the bottom width of the part and the positioning groove 122. After the sealing ring 2 is installed in the lining plate 12 of the socket end 11, under the outward tension of the skeleton 23, the positioning portion 22 is squeezed into the positioning groove 122. The fourth side 221 is a convex curve. Exemplarily, it can be an arc or an elliptical arc, so that the positioning portion 22 can fit with the positioning groove 122 of the socket end 11 under the radially outward tension of the skeleton 23, thereby further enhancing the sealing effect.

[0070] Further, continue to refer to Figure 6, the skeleton 23 is located within the region formed by the fifth side 222, the fourth side 221, and the sixth side 223 of the positioning portion 22. After the socket end 13 is inserted into the spigot end 11, the positioning portion 22 is coupled to the positioning groove 122, and the region formed by the fifth side 222, the fourth side 221, and the sixth side 223 of the positioning portion 22 is located within the positioning groove 122. Therefore, the skeleton 23 is located within the space formed by the positioning groove 122, thereby reducing the possibility of the positioning portion 22 disengaging from the positioning groove 122 and making it difficult for the sealing ring 2 to roll or slide relative to the spigot end 11.

[0071] Further, continue to refer to Figure 6 , along the axial direction of the sealing ring 2, between the positioning portion 22 and the sealing body 21, there is a recessed portion 24 that extends radially inward of the sealing ring 2. The cross-sectional shape of the sealing body 21 further includes a seventh side 241, and the third side 213, the seventh side 241, and the fifth side 222 are connected in sequence. The third side 213, the seventh side 241, and the fifth side 222 correspond to the cross-sectional shape of the recessed portion 24. The recessed portion 24 can be coupled to the protruding portion of the spigot end 11, further reducing the possibility of the sealing ring 2 sliding relative to the lining plate 12. In addition, when the socket end 13 is inserted into the spigot end 11, the protruding portion and the recessed portion 24 are coupled, so that the lining plate 12 can apply torques in opposite directions to the sealing ring 2, reducing the possibility of the sealing ring 2 rolling relative to the lining plate 12 and minimizing the risk of sealing failure caused by the sealing ring 2 disengaging from the sealing groove 121. The seventh side 241 is used to connect the third side 213 and the fifth side 222 to form an inwardly concave shape, and the third side 213, the seventh side 241, and the fifth side 222 correspond to the recessed portion 24.

[0072] Further, the minimum outer diameter of the recessed portion 24 is smaller than the diameter of the skeleton 23, so that the skeleton 23 can be located within the positioning groove 122 of the spigot end 11. When the sealing ring 2 shows a tendency to move relative to the spigot end 11, the protruding portion of the spigot end 11 can block the skeleton 23 by applying a reverse thrust, thereby hindering the movement of the sealing ring 2 relative to the spigot end 11.

[0073] Furthermore, the cross-sectional shape of the sealing body 21 also includes an eighth side 214, which is connected in sequence to the sixth side 223, the eighth side 214, and the second side 212. The eighth side 214 corresponds to the inner side of the tapered structure. The second side 212, the first side 211, the third side 213, the seventh side 241, the fifth side 222, the fourth side 221, the sixth side 223, and the eighth side 214 are connected end-to-end to form the cross-sectional shape of the sealing ring 2. When the plug-in device is inserted into the socket end 11, the eighth side 214 generates friction with the plug-in device, causing the sealing ring 2 to deform. This causes the sealing ring 2 to simultaneously apply pressure to the socket end 11 and the plug-in device, ensuring a good sealing effect. If the plug-in device tends to dislodge from the socket end 11, the opposing friction between the eighth side 214 and the plug-in device can cause the sealing ring 2 to recover its deformation, further increasing the pressure of the sealing ring 2 on the socket end 11 and the plug-in device, thereby generating greater friction and achieving a self-locking and retaining effect.

[0074] Further, see Figure 6 The skeleton 23 applies a radial outward force on the positioning portion 22 along the sealing ring 2. Since the skeleton 23 is located in the space formed by the positioning groove 122, the tension of the skeleton 23 itself can prevent the positioning portion 22 from separating from the positioning groove 122, thereby reducing the possibility of the sealing ring 2 sliding or rolling relative to the liner 12, thereby enhancing the sealing effect.

[0075] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A concrete pipe, characterized in that, Comprising: At least one pipe body extending in a first direction, the pipe body including a socket end and a lining plate, the socket end being located at an end of the pipe body along the first direction, the lining plate being located inside the socket end, the lining plate including an inner wall surface, and the inner wall surface being provided with a sealing groove and a positioning groove; At least one sealing ring, the sealing ring being located inside the lining plate, at least a part of the sealing ring being coupled with the sealing groove, at least a part of the sealing ring being coupled with the positioning groove, and at least a part of the sealing ring protruding relative to the inner wall surface; The sealing ring includes a sealing body, and at least a part of the sealing body is coupled with the sealing groove; The sealing ring further includes a positioning portion, and at least a part of the positioning portion is coupled with the positioning groove; The inner wall surface is further provided with a protruding portion, and the protruding portion is located between the sealing groove and the positioning groove; The sealing ring further includes a recessed portion, and the recessed portion is coupled with the protruding portion; 2. The concrete pipe according to claim 1, characterized in that, A tapered structure is provided inside the sealing body, and the inner diameter of the tapered structure gradually decreases along the direction away from the end of the socket end; 3. The concrete pipe according to claim 1, wherein, The sealing ring further includes a skeleton, the skeleton being arranged circumferentially along the sealing ring inside the positioning portion, and the skeleton being located inside the space formed by the positioning groove; 4. The concrete pipe according to claim 1, characterized in that, The cross-sectional shape of the positioning groove is trapezoidal, and along the axial direction of the pipe body, the width of the bottom of the positioning groove is smaller than the width of the positioning portion; 5. The concrete pipe according to claim 2, wherein The cross-sectional shape of the sealing groove is rectangular; 6. The concrete pipe according to claim 1, wherein, The positioning groove is located on one side of the sealing groove close to the end of the socket end; 7. The concrete pipe according to claim 1, characterized in that, The minimum inner diameter of the inner wall surface of the lining plate is equal to the inner diameter of the socket end; 8. The concrete pipe according to claim 1, characterized in that, The number of the pipe bodies is at least two, and at least two of the pipe bodies are sequentially inserted; The pipe body further includes a spigot end, the spigot end being located at an end of the pipe body along the first direction away from the socket end; among the two inserted pipe bodies, the spigot end of one of the pipe bodies is inserted into the socket end of the other pipe body, and the inner side of the sealing ring of the socket end abuts against the outer side of the spigot end; 9. The concrete pipe according to claim 8, wherein The spigot end is provided with a reduced-diameter structure, and the outer diameter of the reduced-diameter structure gradually increases along the direction from the spigot end to the socket end; 10. The concrete pipe according to claim 1, characterized in that, The material stiffness of the lining plate is greater than or equal to that of steel; the lining plate is prefabricated inside the socket end.

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