A modular self-anchoring structure for top-and-down dual-purpose pipes

Abstract

This utility model discloses a modular self-anchoring structure for a dual-purpose (top-pull and drag) pipe, comprising a spigot, a first pipe body, a second pipe body, a socket, a push-stop ring, and a connecting ring. The spigot, first pipe body, and second pipe body are coaxially connected sequentially. The outer diameter of the spigot is larger than the outer diameter of the first pipe body, and the outer diameter of the second pipe body is equal to or larger than the outer diameter of the first pipe body. The push-stop ring is a ring structure with a notch and is fixed to the first pipe body. The connecting ring is a ring structure composed of multiple connecting blocks, coaxially sleeved on the first pipe body and the spigot. One axial end of each connecting block of the connecting ring is tenon-jointed to the socket, and the other end is confined between the push-stop ring and the spigot. Each connecting block of the connecting ring enters its respective position through the notch on the push-stop ring. This utility model allows the pipe to enter the installation hole by both pushing and dragging methods, providing a dual-purpose pipe with simple components, easy installation, low overall cost, and high joint strength.

Description

Technical Field

[0001] This utility model belongs to the field of pipe technology, specifically a modular self-anchoring structure for a top-and-tow dual-purpose pipe. Background Technology

[0002] Trenchless construction refers to a new construction technology for laying, replacing, and repairing various underground pipelines with minimal surface excavation (generally referring to small-area excavation at the entrance and exit). In trenchless engineering, pipe jacking and pipe dragging are two commonly used techniques for laying pipes. Pipe jacking uses hydraulic jacks or other jacking equipment to push prefabricated pipes section by section from the starting shaft into the soil layer until reaching the receiving shaft, ultimately forming an underground pipeline. Pipe dragging requires connecting adjacent pipes, with the connection joint forming a self-anchoring structure, thus dragging the pipes sequentially into the installation hole. Existing pipes can generally only be used individually as either jacking or dragging pipes. For dragging pipe products, if the self-anchoring structure fails during dragging, causing adjacent pipes to detach, the pipes already dragged into the hole need to be pulled out, reconnected, and dragged again from the beginning. This significantly reduces construction efficiency and increases construction costs. To improve the strength of the connection joint, some existing self-anchoring structures are quite complex. However, the connection of adjacent pipes is carried out and completed on the construction site, where the equipment and technical level of the construction personnel are limited. Therefore, it is best to make the connection interface of adjacent pipes strong and simple. Utility Model Content

[0003] To address the aforementioned problems in existing technologies, the purpose of this utility model is to provide a modular self-anchoring structure for a dual-purpose (top-pull and drag-pull) pipe. The pipe can be inserted into the installation hole via both pushing and dragging methods, offering dual functionality and improving its adaptability to different construction environments and occasions. The connecting ring is formed by splicing multiple connecting blocks, facilitating on-site installation. The self-anchoring structure requires simple components, is easy to install, has low overall cost, and high interface strength, significantly reducing the probability of rework due to interface detachment during construction. It also requires less skill from installation equipment and personnel, making it suitable for on-site installation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A modular self-anchoring structure for a dual-purpose top-and-tow pipe includes a spigot, a first pipe body, a second pipe body, a socket, a push-stop ring, and a connecting ring. The spigot, the first pipe body, and the second pipe body are coaxially connected in sequence. The outer diameter of the spigot is larger than the outer diameter of the first pipe body, and the outer diameter of the second pipe body is equal to or larger than the outer diameter of the first pipe body. The push-stop ring is a ring structure with a notch and is fixed to the first pipe body. The spigot is inserted into the socket, but the push-stop ring does not enter the socket. The connecting ring is a ring structure composed of multiple connecting blocks. The connecting ring is coaxially sleeved on the outside of the first pipe body and the spigot. One axial end of each connecting block of the connecting ring is tenon-jointed to the socket, and the other end is limited between the push-stop ring and the spigot. The socket has a notch for the connecting blocks to pass through. Each connecting block of the connecting ring enters its respective position through the notch on the socket and the notch on the push-stop ring.

[0006] As a further improvement to the above technical solution:

[0007] One end of the connecting block is inserted into the groove in the inner wall of the socket, and the other end contacts the outer wall of the first tube body and is confined between the push-stop ring and the socket.

[0008] The inner wall of the socket is provided with a relief groove, a connecting block mounting groove, and a blocking part in sequence from the end face of the socket away from the end face of the socket. Both the relief groove and the connecting block mounting groove are grooves set on the inner wall of the socket. The inner diameter of the socket at the connecting block mounting groove, the inner diameter at the relief groove, and the inner diameter at the blocking part decreases in sequence. One end of the connecting block is inserted into the connecting block mounting groove in the axial direction.

[0009] The notch formed by removing one ring structure from a ring structure is the socket notch. The ring structure is a ring structure that starts from the end face of the socket and extends to the middle of the socket.

[0010] The self-anchoring structure also includes a socket sealing block for sealing the socket notch and a retaining ring notch sealing block for sealing the notch on the push-pull retaining ring.

[0011] The cross-section of the connecting block includes four rectangular sections connected in sequence: connecting block A, connecting block B, connecting block C, and connecting block D. This cross-section is a section cut by a plane passing through the central axis of the ring containing the connecting ring. Connecting block A, connecting block B, and connecting block C are connected to form a U-shape. Connecting block D is connected to the end of connecting block C that is away from connecting block A. Connecting block A is inserted into the connecting block mounting groove, and connecting block D contacts the first pipe body.

[0012] When the outer diameter of the second tube is greater than that of the first tube, the push-stop ring contacts the stepped surface of the second tube that protrudes from the first tube and is parallel to the radial direction of the second tube.

[0013] The axial distance between the push-stop ring and the socket is greater than the length of the connecting block D. The length of the connecting block D refers to the dimension of the connecting block D in the axial direction of the connecting ring.

[0014] The self-anchoring structure also includes multiple reinforcing ribs for improving the strength of the push-back ring. The reinforcing ribs are located on the side of the push-back ring away from the socket, and the multiple reinforcing ribs are arranged at intervals along the circumference of the second tube.

[0015] The socket of the same pipe and the outer sleeve of the second pipe body are connected with concrete sleeves.

[0016] The beneficial effects of this utility model are:

[0017] (1) In trenchless engineering, the pipe can be entered into the installation hole by jacking and dragging, and can be used as a jacking pipe and a dragging pipe, which improves the adaptability of the pipe to different construction environments and occasions.

[0018] (2) The push-stop ring, connecting ring, and socket can sequentially contact and transmit force, realizing the sequential dragging and pushing of the pipe. The connecting ring also contacts and transmits force with the spigot. When the outer diameter of the second pipe body is larger than that of the first pipe body, the push-stop ring is welded to the first pipe body and contacts the step surface between the first and second pipe bodies. The first pipe body, the second pipe body, and the spigot are each part of the main body of the pipe, with high strength, thereby improving the overall strength and reliability of the self-anchoring structure, which is suitable for large-diameter pipes. When the outer diameter of the second pipe body is equal to that of the first pipe body, the pipe processing is easier.

[0019] (3) The connecting ring is formed by splicing multiple connecting blocks, which is easy to install on the installation site. The self-anchoring structure requires simple components and is easy to install. The overall cost is low and the interface strength is high, which greatly reduces the probability of rework due to interface separation during construction. It has low requirements for installation equipment and personnel technical level and is suitable for installation on the construction site. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the pipe structure according to Embodiment 1 of this utility model.

[0021] Figure 2 This is a structural schematic diagram of the pipe material from another perspective of Embodiment 1 of this utility model.

[0022] Figure 3 yes Figure 2 A schematic diagram of the BB cross-sectional structure.

[0023] Figure 4 This is a schematic diagram of the self-anchoring structure of Embodiment 1 of this utility model. Figure 1 .

[0024] Figure 5This is a schematic diagram of the self-anchoring structure of Embodiment 1 of this utility model. Figure 2 .

[0025] Figure 6 This is a schematic diagram of the connecting block in Embodiment 1 of this utility model.

[0026] Figure 7 yes Figure 6 A schematic diagram of the AA cross-sectional structure.

[0027] Figure 8 This is a schematic diagram of the end face structure of the connecting ring in Embodiment 1 of this utility model.

[0028] Figure 9 This is a schematic diagram of the retaining ring notch and the socket notch of the self-anchoring structure in Embodiment 1 of this utility model.

[0029] Figure 10 This is a schematic diagram of the installation of the connecting block according to Embodiment 1 of this utility model. Figure 1 .

[0030] Figure 11 This is a schematic diagram of the installation of the connecting block according to Embodiment 1 of this utility model. Figure 2 .

[0031] Figure 12 This is a schematic diagram of the pipe structure according to Embodiment 2 of this utility model.

[0032] Figure 13 This is a schematic diagram of the self-anchoring structure of Embodiment 2 of this utility model. Figure 1 .

[0033] Figure 14 This is a schematic diagram of the self-anchoring structure of Embodiment 2 of this utility model. Figure 2 .

[0034] Reference numerals: 1. Socket, 11. Socket reinforcing ring, 2. Socket, 21. Clearance groove, 22. Connecting block mounting groove, 23. Blocking part, 24. Sealing groove, 25. Socket notch, 3. First pipe body, 4. Second pipe body, 5. Push-back ring, 51. Retaining ring notch, 6. Reinforcing rib, 7. Concrete sleeve, 8. Connecting ring, 811. Connecting block A part, 812. Connecting block B part, 813. Connecting block C part, 814. Connecting block D part, 9. Sealing ring. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Example 1

[0038] A modular self-anchoring structure for a dual-purpose top-and-tow pipe, such as Figure 1 As shown, the pipe includes a spigot 1, a first pipe body 3, a second pipe body 4 and a socket 2 connected coaxially in sequence. The spigot 1, the first pipe body 3 and the second pipe body 4 are all cylindrical structures.

[0039] The outer diameter of the socket 1 is larger than the outer diameter of the first tube body 3, causing the socket 1 to protrude from the outer surface of the first tube body 3 to form a stepped structure. The end face of the socket 1 away from the first tube body 3 is the end face of the socket 1, and the end face or side face of the socket 1 connected to the first tube body 3 is the stepped surface. That is, the stepped surface is formed by the socket 1 protruding from the surface of the first tube body 3, and the plane on which the stepped surface is located is parallel to the radial direction of the socket 1.

[0040] The outer diameter of the second tube 4 is larger than the outer diameter of the first tube 3, causing the second tube 4 to protrude from the outer surface of the first tube 3, forming a stepped structure. The second tube 4 protrudes from the surface of the first tube 3, forming a stepped surface parallel to the radial direction.

[0041] A reinforcing ring 11 is fitted inside the socket 1 to enhance its strength. The reinforcing ring 11 can be integrally formed with the socket 1, essentially making them two layers of the same or different metal materials. Alternatively, the reinforcing ring 11 can be installed separately. When installed separately, the reinforcing ring 11 is annular, typically made of stainless steel, and possesses a certain degree of ductility and rigidity. The initial outer diameter of the reinforcing ring 11 is smaller than the inner diameter of the socket 1. During installation, the reinforcing ring 11 is placed inside the socket 1, and then its diameter is expanded using an expanding device until it is tightly pressed against the inner wall of the socket 1. The reason why the spigot reinforcing ring 11 can be pressed tightly against the inner wall of the spigot 1 is that during the expansion process, the inner wall of the spigot 1 will be subjected to radial pressure from the expansion equipment. After the pressure is removed (the expansion is completed), the spigot 1 and the spigot reinforcing ring 11 will have a certain elastic recovery. Since the spigot 1 has a thick wall and is connected to the pipe body, the elastic recovery is greater than that of the spigot reinforcing ring 11. After the recovery, the spigot reinforcing ring 11 is pressed tightly against the inner wall of the spigot.

[0042] The inner diameter and outer diameter of the first tube body 3 are equal everywhere, and the inner diameter and outer diameter of the second tube body 4 are equal everywhere. The inner and outer diameters of the second tube body 4 are equal to the inner and outer diameters of the spigot 1, respectively. The outer diameter of the socket 2 is greater than the outer diameter of the second tube body 4.

[0043] A push-stop ring 5 is fixedly installed on the outer surface of the first pipe body 3, and a reinforcing rib 6 and a concrete sleeve 7 are fixedly installed on the outer surface of the second pipe body 4.

[0044] The top push-stop ring 5 contacts the stepped surface of the second tube body 4 and protrudes from the outer surface of the second tube body 4, where the outer surface of the second tube body 4 refers to the curved outer wall of the second tube body 4.

[0045] In this embodiment, the push-stop ring 5 is a metal ring structure with a notch. In other words, the push-stop ring 5 is formed by removing a segment of the ring structure from a ring structure, thus forming the notch 51. The push-stop ring 5 is coaxially and fixedly sleeved on the outer surface of the first tube body 3. The inner surface of the push-stop ring 5 contacts the outer surface of the first tube body 3, and the end face of the push-stop ring 5 away from the insertion port 1 contacts the stepped surface of the second tube body 4.

[0046] The outer diameter of the push-stop ring 5 is greater than the outer diameter of the socket 1. The width of the push-stop ring 5 is greater than the length of the first tube body 3. The width of the push-stop ring 5 refers to the axial dimension of the push-stop ring 5, and the length of the first tube body 3 refers to the axial dimension of the first tube body 3.

[0047] In this embodiment, the push-stop ring 5 is welded to the first tube body 3.

[0048] The concrete sleeve 7 is fitted over the second pipe body 4 and the socket 2. Specifically, the outer diameter of the socket 2 is largest at its end face, and the outer diameter of the push-resist ring 5 is equal to the outer diameter of the socket 2 at its end face. This creates an inward recessed space between the outer wall of the socket 2 at its end face and the push-resist ring 5, which is used to house the concrete sleeve 7. The concrete sleeve 7 is fitted between the end face of the socket 2 and the push-resist ring 5, and the outer diameter of the concrete sleeve 7 is equal to the outer diameter of the push-resist ring 5. The main material of the concrete sleeve 7 is cement mortar.

[0049] The reinforcing rib 6 is used to improve the installation strength of the push-pull retaining ring 5. The reinforcing rib 6 is located on the side of the push-pull retaining ring 5 away from the spigot 1. The reinforcing rib 6 is a plate-like structure or a frame structure, and it connects the push-pull retaining ring 5 and the second pipe body 4. There are multiple reinforcing ribs 6, which are arranged at intervals along the circumference of the second pipe body 4. Cement mortar can be filled between adjacent reinforcing ribs 6, meaning that the reinforcing rib 6 does not affect the installation of the concrete sleeve 7. The end face of the socket 2 refers to the end face of the socket 2 away from the spigot 1, or the end face of the open end of the socket 2.

[0050] The inner wall of the socket 2, starting from the end face of the socket 2 and moving towards the spigot 1, is sequentially provided with a relief groove 21, a connecting block mounting groove 22, a blocking portion 23, and a sealing groove 24. The relief groove 21, the connecting block mounting groove 22, and the sealing groove 24 are all essentially recesses formed within the inner wall of the socket 2, i.e., recessed from the inner wall of the socket 2. Each recess is a circumferential groove along the inner wall of the socket 2. The blocking portion 23 is the portion that does not undergo this recess and forms the initial inner wall of the socket 2. Therefore, the inner diameter of the socket 2 at the relief groove 21, the inner diameter at the connecting block mounting groove 22, and the inner diameter at the sealing groove 24 are all larger than the inner diameter of the socket 2 at the blocking portion 23. The inner diameter of the socket 2 at the connecting block mounting groove 22 is larger than the inner diameter of the socket 2 at the relief groove 21.

[0051] The socket 2 also has a notch, called socket notch 25, such as Figure 2 and 3 As shown, it is used for the connecting block (see description below) to pass through. The socket notch 25 is formed by removing material from the socket 2. Specifically, it is formed by removing a sector of the annular structure from the end face of the socket 2 toward the spigot 1 to the middle of the socket 2. That is, the socket notch 25 is a sector annular structure.

[0052] The pipe can be a socket-type pipe, a straight pipe, or other irregularly shaped pipe.

[0053] In this embodiment, the pipe is a socket-type pipe.

[0054] When two adjacent pipes are connected, the spigot 1 of one pipe is inserted into the socket 2 of the other pipe, and with the cooperation of other auxiliary parts, the self-anchoring structure is formed.

[0055] The self-anchoring structure is as follows Figure 4 and5 As shown, it includes a spigot 1, a socket 2, a first pipe body 3, a push-stop ring 5, a reinforcing rib 6, a connecting ring 8, a sealing ring 9, a socket closing block, and a retaining ring notch closing block. The spigot 1 is inserted into the socket 2. Obviously, the spigot 1 and the first pipe body 3 of the self-anchoring structure are the same pipe material, while the socket 2 is the socket 2 of another pipe material.

[0056] The connecting ring 8 is a ring structure, comprising multiple connecting blocks that are sequentially spliced ​​together along the circumference of the connecting ring 8 to form a ring structure. The connecting ring 8 is coaxially sleeved on the outside of the socket 1 and the first pipe body 3. One end of the connecting ring 8 is tenon-and-mortise connected to the socket 2, and the other end is tenon-and-mortise connected to the first pipe body 3 and the socket 1. The connecting ring 8, socket 2, socket 1, and first pipe body 3 are spliced ​​and engaged by tenon-and-mortise connections, forming a self-anchoring structure that will not detach. Specifically, one axial end of the connecting ring 8 passes through the clearance groove 21 and inserts into the connecting block mounting groove 22, while the other axial end of the connecting ring 8 contacts the first pipe body 3 and is blocked by the stepped surface between the first pipe body 3 and the socket 1.

[0057] The cross-sectional structure of the connecting block is as follows Figure 6 and 7 As shown, this cross-section is a section taken from a plane passing through the central axis of the ring containing the connecting ring 8. The cross-section of the connecting block can be considered as including the sequentially connected rectangular connecting blocks A 811, B 812, C 813, and D 814, with the dividing lines of each part as shown. Figure 7 As shown by the dashed line. Among them, connecting block A 811, connecting block B 812, and connecting block D 814 are long rectangular strips, while connecting block C 813 is close to a square shape.

[0058] Connecting block A 811, connecting block B 812, and connecting block C 813 are connected in a U-shape, and connecting block D 814 is connected to the end of connecting block C 813 away from connecting block A 811. Specifically, the length direction of connecting block A 811 is perpendicular to the central axis, and the length directions of connecting block B 812, connecting block C 813, and connecting block D 814 are all parallel to the central axis. The width direction of connecting block A 811 is parallel to the central axis, and the width directions of connecting block B 812, connecting block C 813, and connecting block D 814 are all perpendicular to the central axis. The width of connecting block C 813 is greater than the length of connecting block A 811, and the length of connecting block C 813 is greater than the length of connecting block D 814. One wide side of connecting block A 811, one long side of connecting block B 812, one long side of connecting block C 813, and one long side of connecting block D 814 are located on the same straight line. Specifically, one wide side of connecting block A 811, one long side of connecting block B 812, and one long side of connecting block C 813 are connected sequentially, meaning they do not overlap. A long side of connecting block D 814 partially overlaps with a long side of connecting block C 813. The wide side of connecting block D 814 away from connecting block A 811 and the wide side of connecting block C 813 away from connecting block A 811 are located on the same straight line. Therefore, it is equivalent to connecting block A 811, connecting block B 812, and connecting block C 813 being located on one side of a straight line, and connecting block D 814 being located on the other side of this straight line.

[0059] Connecting block A part 811, connecting block B part 812, connecting block C part 813 contact the outer surface of the socket 1, and connecting block D part 814 contact the outer surface of the first tube body 3.

[0060] The width of the connecting block A portion 811 is not greater than the width of the connecting block mounting groove 22, and the outer diameter of the connecting ring 8 at the connecting block A portion 811 is not greater than the inner diameter of the socket 2 at the connecting block mounting groove 22, so that the connecting block A portion 811 can be inserted into the connecting block mounting groove 22. The width of the connecting block mounting groove 22 is the dimension of the connecting block mounting groove 22 in the direction parallel to the central axis.

[0061] The length of the connecting block B part 812 is not less than the width of the relief groove 21, and the outer diameter of the connecting ring 8 at the connecting block B part 812 is not greater than the inner diameter of the socket 2 at the relief groove 21, so that the connecting block B part 812 can pass through or enter between the inner walls of the socket 1 and the socket 2 at the relief groove 21. The width of the relief groove 21 is the dimension of the relief groove 21 in the direction parallel to the central axis.

[0062] The inner diameter of the connecting ring 8 at the connecting block D portion 814 is not less than the outer diameter of the first tube body 3, and the length of the connecting block D portion 814 is less than the length of the first tube body 3. The outer diameter of the connecting ring 8 at the connecting block C portion 813 is equal to the outer diameter of the push-stop ring 5.

[0063] In this embodiment, the inner diameter of the connecting ring 8 at the connecting block D part 814 is equal to the outer diameter of the first tube body 3.

[0064] It should be noted that the arc length occupied by each connecting block in the ring 8 is not necessarily equal. The arc length can be flexibly set, as long as the connecting blocks are spliced ​​together to form the connecting ring 8. Figure 8 As shown. Furthermore, the splicing surface of two adjacent connecting blocks does not necessarily pass through the central axis of the connecting ring 8.

[0065] The socket sealing block is used to close the socket notch 25. The shape and size of the socket sealing block are the same as those of the socket notch 25. The socket sealing block is a rigid metal block, which is fixedly connected to the socket 2 by welding, bonding or other methods.

[0066] The retaining ring notch closing block is used to close the retaining ring notch 51. The shape and size of the retaining ring notch closing block are the same as those of the retaining ring notch 51. The retaining ring notch closing block is a rigid metal block, which is fixedly connected to the push-pull retaining ring 5 by welding, bonding or other methods.

[0067] Both the socket notch 25 and the retaining ring notch 51 are used for the connecting block to pass through during installation. Therefore, the circumferential dimensions of the socket notch 25 and the retaining ring notch 51 are not less than the circumferential dimensions of the connecting block.

[0068] The sealing groove 24 is used to install the sealing ring 9 to achieve a seal after the two adjacent pipes are connected. The sealing ring 9 is pressed between the spigot 1 and the socket 2.

[0069] Based on the above structure, the working principle and method for connecting adjacent pipes are as follows:

[0070] The first step is in the first tube ( Figure 4 and 5 A sealing ring 9 is installed in the sealing groove 24 of the pipe where the middle socket 2 is located.

[0071] The second step is to insert the second tube ( Figure 4 and 5 The spigot 1 of the pipe containing the spigot 1 is inserted into the socket 2, while aligning the socket notch 25 and the retaining ring notch 51, which is equivalent to the retaining ring notch 51 and the socket notch 25 being located on the same straight line parallel to the central axis.

[0072] The third step is to install the connecting blocks. Install the connecting blocks in order of increasing distance from the socket notch 25 in the circumferential direction. First, move the end of connecting block D 814 furthest from connecting block C 813 towards the retaining ring notch 51, radially closer to the central axis, until connecting block D 814 enters the retaining ring notch 51, and connecting block A 811 and connecting block mounting groove 22 are basically flush. Figure 10 As shown.

[0073] Then, the connecting block is moved axially until the connecting block A part 811 enters the connecting block mounting groove 22, as shown. Figure 11 As shown. At this time, the connecting block D part 814 contacts the outer surface of the first tube body 3, and the connecting block A part 811, the connecting block B part 812 and the connecting block C part 813 all contact the socket 1.

[0074] Finally, move the connecting block circumferentially until it reaches the target position.

[0075] When installing the last connecting block, there is no need to move the connecting block circumferentially; that is, the connecting block is installed at the socket notch 25.

[0076] Both the push-stop ring 5 and the connecting block D portion 814 contact the outer surface of the first tube body 3. Therefore, the sum of the width of the push-stop ring 5 and the length of the connecting block D portion 814 is not greater than the length of the first tube body 3. In this embodiment, the sum of the width of the push-stop ring 5 and the length of the connecting block D portion 814 is slightly less than the length of the first tube body 3.

[0077] Fourth step: Seal the socket notch 25 and the retaining ring notch 51. Insert the socket closing block into the socket notch 25 and the retaining ring notch closing block into the retaining ring notch 51 to prevent the connecting blocks at the socket notch 25 and the retaining ring notch 51 from falling out. The socket closing block and the socket 2 can be fixedly connected together by welding or bonding.

[0078] Based on the above pipe connection method, when the pipe is used for pipe jacking construction, the first pipe is first jacked into the installation hole, then the second pipe and the first pipe are connected according to the above connection method, and then the second pipe is jacked up. At this time, the jacking retaining ring 5 contacts the connecting ring 8, as shown. Figure 4 As shown, the second pipe pushes the first pipe a certain distance to the right. Then, the third pipe is connected to the second pipe in the same way, and the third pipe is pushed forward. This process is repeated, and multiple interconnected pipes are sequentially pushed into the installation hole. Due to the presence of the concrete sleeve 7, the outer diameter of each connected pipe is equal everywhere, thus greatly reducing the forward resistance of the pipes in the installation hole. This is equivalent to... Figure 4 This is a schematic diagram of a self-anchoring structure in the jacking state.

[0079] When the pipe is used as a drag pipe in construction, after connecting two adjacent pipes according to the above connection method, pulling the first pipe to the right will cause the first pipe to pull the second pipe to move to the right. At this time, the connecting ring 8 contacts the stepped surface at the connection between the first pipe body 3 and the socket 1. Figure 5 As shown, or by pulling the second tube to the left, the second tube will pull the first tube to the left. In this way, multiple sequentially connected tubes are pulled into the installation holes. This is equivalent to... Figure 5 This is a schematic diagram of a self-anchoring structure in a dragging state.

[0080] Example 2

[0081] Unlike Embodiment 1, in this embodiment, the outer diameter of the second tube 4 is equal to the outer diameter of the first tube 3, and both are smaller than the outer diameter of the socket 1. Figures 12-14 As shown, this is equivalent to a cylindrical pipe body formed by connecting the second pipe body 4 and the first pipe body 3 into a single unit. Clearly, the processing difficulty of the pipe material in this embodiment is less than that of the pipe material in Embodiment 1. Figure 13 This is a schematic diagram of a self-anchoring structure in a dragged state. Figure 14 This is a schematic diagram of a self-anchoring structure in the jacking state.

[0082] Finally, it is necessary to state that the above embodiments are only used to further illustrate the technical solution of this utility model in detail, and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the above content of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A block-type self-anchored structure of a pipe for both top and bottom drag, characterized in that, The system includes a spigot (1), a first tube body (3), a second tube body (4), a socket (2), a push-stop ring (5), and a connecting ring (8). The spigot (1), the first tube body (3), and the second tube body (4) are coaxially connected in sequence. The outer diameter of the spigot (1) is larger than the outer diameter of the first tube body (3), and the outer diameter of the second tube body (4) is equal to or larger than the outer diameter of the first tube body (3). The push-stop ring (5) is a ring structure with a notch. The push-stop ring (5) is fixed on the first tube body (3). The spigot (1) is inserted into the socket (2), and the push-stop ring (5) is not... Entering the socket (2), the connecting ring (8) is a ring structure spliced ​​from multiple connecting blocks. The connecting ring (8) is coaxially sleeved on the outside of the first pipe body (3) and the spigot (1). One end of each connecting block of the connecting ring (8) is tenon-jointed to the socket (2) and the other end is limited between the top push ring (5) and the spigot (1). The socket (2) is provided with a notch for the connecting block to pass through, which is the socket notch (25). Each connecting block of the connecting ring (8) enters its respective position through the socket notch (25) and the notch on the top push ring (5).

2. A self-anchoring structure according to claim 1, characterized in that: One end of the connecting block is inserted into the groove on the inner wall of the socket (2) and the other end contacts the outer wall of the first tube body (3) and is confined between the push-stop ring (5) and the socket (1).

3. A self-anchoring structure according to claim 2, wherein: The inner wall of the socket (2) is provided with a relief groove (21), a connecting block mounting groove (22) and a blocking part (23) in sequence from the end face of the socket (2) toward the direction away from the end face of the socket (2). The relief groove (21) and the connecting block mounting groove (22) are both grooves provided on the inner wall of the socket (2). The inner diameter of the socket (2) at the connecting block mounting groove (22), the inner diameter at the relief groove (21), and the inner diameter at the blocking part (23) decrease in sequence. One end of the connecting block is inserted into the connecting block mounting groove (22) in the axial direction.

4. A self-anchoring structure according to claim 3, wherein: The notch formed by removing one ring structure from a ring structure is the socket notch (25). The ring structure is a ring structure that starts from the end face of the socket (2) and extends to the middle of the socket (2).

5. A self-anchoring structure according to claim 4, wherein: The self-anchoring structure also includes a socket retaining block for closing the socket notch (25) and a retaining ring notch retaining block for closing the notch on the push-pull retaining ring (5).

6. A self-anchoring structure according to claim 3, wherein: The cross-section of the connecting block includes a rectangular connecting block A (811), a connecting block B (812), a connecting block C (813), and a connecting block D (814) connected in sequence. The cross-section is a cross-section taken by a plane passing through the central axis of the ring where the connecting ring (8) is located. The connecting block A (811), connecting block B (812), and connecting block C (813) are connected to form a U-shape. The connecting block D (814) is connected to the end of the connecting block C (813) away from the connecting block A (811). The connecting block A (811) is inserted into the connecting block mounting groove (22), and the connecting block D (814) contacts the first tube body (3).

7. A self-anchoring structure according to claim 2, wherein: When the outer diameter of the second tube (4) is greater than the outer diameter of the first tube (3), the push-stop ring (5) contacts the step surface of the second tube (4) that protrudes from the first tube (3) and is parallel to the radial direction of the second tube (4).

8. A self-anchoring structure according to claim 6, wherein: The axial distance between the push block ring (5) and the socket (1) is greater than the length of the connecting block D part (814), the length of the connecting block D part (814) refers to the size of the connecting block D part (814) in the axial direction of the connecting ring (8).

9. A self-anchoring structure according to any one of claims 1 to 8, wherein: The self-anchoring structure further comprises a plurality of reinforcing ribs (6) for improving the strength of the push block ring (5), the reinforcing ribs (6) are located on the side of the push block ring (5) away from the socket (1), and the plurality of reinforcing ribs (6) are arranged in a spaced manner along the circumference of the second pipe body (4).

10. A self-anchoring structure according to any one of claims 1 to 8, wherein: The socket (2) and the second pipe body (4) of the same pipe are sleeved with a concrete sleeve (7).

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