Inflatable self-anchoring structure for dragging pipe
The design of the inflatable self-anchor structure solves the problem of self-anchor structure failure during pipe dragging construction, achieves stable dragging and deflection of the pipe, simplifies the installation process, improves construction efficiency and interface strength, and reduces costs.
Patent Information
- Application Number
- CN202521876558.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2035-09-02
AI Technical Summary
The failure of the self-anchoring structure of existing drag pipes during construction causes adjacent pipes to become detached, reducing construction efficiency and increasing costs. Furthermore, the connection relies heavily on on-site equipment and personnel skills, making it difficult to simplify and improve interface strength.
The inflatable self-anchor structure includes a socket, a socket, a protrusion, a retaining ring and an inflatable ring. The protrusion is clamped by inflating the retaining ring to achieve stable dragging of adjacent pipes and allow deflection, simplifying the installation process.
It improves construction efficiency, reduces the probability of rework, reduces dependence on equipment and personnel technical level, reduces overall costs, and enhances interface strength and flexibility.
Smart Images
Figure CN223447917U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipes, in particular to an inflatable self-anchoring structure for dragging pipes. Background Art
[0002] Drag-and-pull pipe technology is a trenchless underground pipeline installation method. Trenchless refers to a new construction technique for laying, replacing, and repairing various underground pipelines using minimal surface excavation (generally referring to small excavations at the entrance and exit). During pipe-drag construction, two adjacent pipes are connected, forming a self-anchoring structure at the connection interface. The pipes are then dragged sequentially into the installation channel. If the self-anchoring structure fails during the dragging process, causing adjacent pipes to become detached, the pipes must be pulled out of the hole, reconnected, and the dragging process restarted. This significantly reduces construction efficiency and increases costs. Furthermore, the connection of adjacent pipes is performed and completed on-site, where equipment and personnel skills are limited. Therefore, it is best to keep the connection simple. Utility Model Content
[0003] In response to the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide an inflatable self-anchoring structure for dragging pipes, which can realize the sequential dragging of pipes and allow deflection between adjacent pipes. The required components are simple, the installation is simple, the overall cost is low, the interface strength is high, and the probability of rework due to interface detachment during the construction process is greatly reduced. The requirements for installation equipment and personnel technical level are low, and it is suitable for installation on construction sites.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] An inflatable self-anchoring structure for dragging pipes includes a socket and a socket, the socket is inserted into the socket, and the self-anchoring structure also includes a protrusion, a stop ring, and an inflatable ring. The protrusion is fixedly installed on the outer surface of the socket, and the inner surface of the socket is provided with an inflatable stop groove which is a groove. The stop ring and the inflatable ring are arranged in the inflatable stop groove. The inflatable ring is expanded by inflation to clamp the stop ring between the inflatable ring and the socket, so that the stop ring extends out of the inflatable stop groove to contact the protrusion. The stop ring and the protrusion can contact and transmit axial thrust, and the axial thrust realizes the sequential dragging of adjacent pipes.
[0006] As a further improvement of the above technical solution:
[0007] The retaining ring comprises at least two arc-shaped unit components, and the unit components can be sequentially spliced into a circular ring structure, and the inner diameter of the spliced circular ring structure is smaller than the outer diameter of the protruding component.
[0008] An air filling hole is also provided on the socket, and the air filling hole is a radial through hole connected to the air filling anti-retraction groove.
[0009] The inflation ring is provided with an inflation nozzle, and the inflation nozzle is arranged in the inflation hole.
[0010] The end face of the retreat prevention ring facing the opening of the socket is provided with a bevel.
[0011] The inner wall of the socket is provided with a first avoiding groove, an inflation retreat prevention groove, a second avoiding groove and a blocking part in sequence from the end face to a direction away from the end face, and the first avoiding groove and the second avoiding groove are used for avoiding the protruding part, so that the protruding part can enter the second avoiding groove after the socket is inserted into the socket.
[0012] The inner diameter of the socket at the inflation retreat prevention groove is greater than the inner diameter of the socket at the first avoiding groove, the inner diameter of the socket at the first avoiding groove is not less than the inner diameter of the socket at the second avoiding groove, and the outer diameter of the protruding part is less than the inner diameter of the socket at the second avoiding groove and greater than the inner diameter of the socket at the blocking part.
[0013] The width of the retreat prevention ring is not greater than the width of the inflation retreat prevention groove, and the width of the protruding part is less than the width of the second avoiding groove, the width of the retreat prevention ring refers to the axial dimension of the retreat prevention ring, the width of the protruding part refers to the axial dimension of the protruding part, the width of the inflation retreat prevention groove refers to the dimension of the inflation retreat prevention groove in the axial direction of the socket, and the width of the second avoiding groove refers to the dimension of the second avoiding groove in the axial direction of the socket.
[0014] The self-anchoring structure further comprises a sealing ring, and the sealing ring is compressed between the socket and the socket.
[0015] The self-anchoring structure has the advantages that:
[0016] (1) The retreat prevention ring and the protruding part can contact and transmit force, realize the sequential dragging of the pipe, the protruding part is welded on the socket, the retreat prevention ring is clamped between the inflation ring and the socket in the radial direction and is limited in the inflation retreat prevention groove in the axial direction, so that the self-anchoring structure is stable and has high strength.
[0017] (2) The retreat prevention ring comprises at least two arc-shaped single elements, the retreat prevention ring can be pushed back into the inflation retreat prevention groove during the process of inserting the socket into the socket, and the anchoring of the socket and the socket is realized by inflating the inflation ring after the socket and the protruding part are in place, and these designs make the connection and installation of the self-anchoring structure simple.
[0018] (3) There is a gap between the inner wall of the socket at the first avoiding groove and the socket, there is a gap between the protruding part and the inner wall of the socket at the second avoiding groove, and the inflated inflation ring has a certain elasticity, and the comprehensive effect of these designs allows the adjacent pipes to deflect, so that the pipes can deflect under external factors during the construction process and the use process, and the flexibility and applicability of the pipes are improved.
[0019] (4) The self-anchoring structure requires simple components and is easy to install. It has a low overall cost and high interface strength, which greatly reduces the probability of rework due to interface detachment during the construction process. It has low requirements on the installation equipment and the technical level of the personnel, and is suitable for installation on the construction site. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the self-anchoring structure of an embodiment of the utility model.
[0021] Figure 2 It is a schematic diagram of the pipe structure of an embodiment of the utility model.
[0022] Figure 3 This is a schematic diagram of the state of the self-anchoring structure of one embodiment of the present invention during the insertion process of the socket.
[0023] Figure 4 This is a schematic diagram of a self-anchoring structure according to an embodiment of the present invention when the spigot and the socket undergo relative deflection.
[0024] Figure markings: 1. socket, 2. socket, 21. first avoidance groove, 22. inflation check groove, 23. second avoidance groove, 24. blocking part, 25. sealing groove, 26. inflation hole, 3. tube body, 4. protrusion, 5. check ring, 6. inflation ring, 61. inflation nozzle, 7. sealing ring. DETAILED DESCRIPTION
[0025] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.
[0026] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "upper" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in a drawing is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.
[0027] An inflatable self-anchoring structure for pulling pipes, such as Figure 2As shown, the pipe material comprises a socket 1, a pipe body 3 and a spigot 2 connected coaxially in sequence, the inner diameter of the socket 1 is the same as that of the pipe body 3, the outer diameter of the socket 1 is the same as that of the pipe body 3, and the socket 1 is externally fixedly installed with a protruding piece 4.
[0028] In this embodiment, the protruding piece 4 is of annular structure made of metal material, and is coaxially fixedly sleeved on the outer surface of the socket 1, i.e. the inner diameter of the protruding piece 4 is equal to the outer diameter of the socket 1.
[0029] In this embodiment, the protruding piece 4 is welded on the socket 1.
[0030] The inner wall of the spigot 2 of the same pipe material is sequentially provided with a first avoiding groove 21, an inflation stop groove 22, a second avoiding groove 23, a blocking part 24 and a sealing groove 25 from the end face of the end away from the pipe body 3 towards the pipe body 3. The first avoiding groove 21, the inflation stop groove 22, the second avoiding groove 23 and the sealing groove 25 are equivalent to grooves provided on the inner wall of the spigot 2, i.e. are formed in concave from the inner wall of the spigot 2, and the blocking part 24 is equivalent to a part without concave, each groove is a groove along a circumference of the inner wall of the spigot 2. Therefore, the inner diameter of the spigot 2 at the first avoiding groove 21, the inner diameter of the spigot 2 at the inflation stop groove 22, the inner diameter of the spigot 2 at the second avoiding groove 23 and the inner diameter of the spigot 2 at the sealing groove 25 are all greater than the inner diameter of the spigot 2 at the blocking part 24.
[0031] In this embodiment, the inner diameter of the spigot 2 at the inflation stop groove 22 is greater than the inner diameter of the spigot 2 at the first avoiding groove 21 and the inner diameter of the spigot 2 at the second avoiding groove 23, and the inner diameter of the spigot 2 at the first avoiding groove 21 is not less than the inner diameter of the spigot 2 at the second avoiding groove 23. The outer diameter of the protruding piece 4 is less than the inner diameter of the spigot 2 at the second avoiding groove 23 and greater than the inner diameter of the spigot 2 at the blocking part 24. The outer diameter of the socket 1 is less than the inner diameter of the spigot 2 at the blocking part 24.
[0032] The spigot 2 is further provided with an inflation hole 26, which is a radial through hole communicating with the inflation stop groove 22. That is, one end of the inflation hole 26 communicates with the inflation stop groove 22, and the other end is provided with an opening on the outer surface of the spigot 2. The inflation hole 26 is provided with at least one.
[0033] In this embodiment, the inflation hole 26 is a counterbore.
[0034] In this embodiment, the pipe material is a socket and spigot pipe material.
[0035] When two adjacent pipe materials are connected, the socket 1 of one pipe material is inserted into the spigot 2 of the other pipe material, and in combination with the cooperation of other auxiliary parts, the self-anchoring structure is formed.
[0036] The self-anchoring structure is as shown in Figure 1As shown, it comprises spigot 1, socket 2, protruding member 4, retainer ring 5, inflatable ring 6, sealing ring 7. Spigot 1 is inserted into socket 2, the spigot 1 and socket 2 of the self-anchoring structure are the spigot 1 and socket 2 of two adjacent pipes respectively, the protruding member 4 on the spigot 1 enters into the socket 2 together, and enters into the second avoiding groove 23.
[0037] The first avoiding groove 21 and the second avoiding groove 23 are used to avoid the protruding member 4, so that after the spigot 1 is inserted into the socket 2, the protruding member 4 can enter into the second avoiding groove 23.
[0038] The inflatable retainer groove 22 is used to install the retainer ring 5 and the inflatable ring 6.
[0039] The retainer ring 5 comprises at least two arc-shaped single elements, each single element can be sequentially spliced into a circular ring structure, the inner diameter of the spliced circular ring structure is smaller than the outer diameter of the protruding member 4, and the inner diameter of the spliced circular ring structure can be smaller than, equal to, or greater than the outer diameter of the spigot 1. The outer diameter of the spliced circular ring structure is greater than the inner diameter of the socket 2 at the first avoiding groove 21 and the inner diameter of the socket 2 at the second avoiding groove 23, and is smaller than the inner diameter of the socket 2 at the inflatable retainer groove 22.
[0040] In the embodiment, the inner diameter of the spliced circular ring structure is equal to the outer diameter of the spigot 1.
[0041] The width of the retainer ring 5 is not greater than the width of the inflatable retainer groove 22, and the width of the protruding member 4 is smaller than the width of the second avoiding groove 23. The width of the retainer ring 5 refers to the axial dimension of the retainer ring 5, the width of the protruding member 4 refers to the axial dimension of the protruding member 4, the width of the inflatable retainer groove 22 refers to the dimension of the inflatable retainer groove 22 in the axial direction of the socket 2, and the width of the second avoiding groove 23 refers to the dimension of the second avoiding groove 23 in the axial direction of the socket 2.
[0042] The inflatable ring 6 is a ring-shaped inflatable component, similar to a tire. The inflatable ring 6 can be inflated, and after inflation, the inflatable ring 6 expands. After the gas in the inflatable ring 6 is discharged, the inflatable ring 6 collapses and shrinks.
[0043] The retainer ring 5 and the inflatable ring 6 are both installed in the inflatable retainer groove 22, and the inflatable ring 6 is sleeved outside the retainer ring 5, that is, the retainer ring 5 is closer to the central axis of the socket 2 than the inflatable ring 6.
[0044] The inflatable ring 6 is provided with an inflation nozzle 61, through which the inflatable ring 6 is inflated or the gas in the inflatable ring 6 is discharged. The inflation nozzle 61 is arranged in the inflation hole 26, that is, one end of the inflation nozzle 61 communicates with the inflatable ring 6, and the other end communicates with the outside.
[0045] When the gas is filled into the inflatable ring 6, the pressure is exerted on the retainer ring 5, so that the retainer ring 5 partially extends out of the inflatable retainer groove 22 and partially stays in the inflatable retainer groove 22. The part of the retainer ring 5 extending out of the inflatable retainer groove 22 contacts the spigot 1 and the protruding member 4. Specifically, the inner wall of the retainer ring 5 contacts the outer surface of the spigot 1, and the end face of the retainer ring 5 contacts the protruding member 4 and can transmit axial thrust force, so as to realize the sequential pulling of the adjacent pipes. The retainer ring 5 is equivalent to being clamped between the inflatable ring 6 and the spigot 1.
[0046] The sealing groove 25 is used for installing the sealing ring 7, so as to realize the sealing after the connection of the adjacent two pipes. The sealing ring 7 is compressed between the spigot 1 and the socket 2.
[0047] Based on the above structure, when the adjacent pipes are connected, the sealing ring 7 is first installed in the sealing groove 25 of the first pipe, and the inflatable ring 6 and the retainer ring 5 are sequentially installed in the inflatable retainer groove 22 of the first pipe. When the inflatable ring 6 is installed, the inflatable nozzle 61 on the inflatable ring 6 is passed through the inflatable hole 26. Then, the spigot 1 of the second pipe is inserted into the socket 2. During the insertion of the spigot 1 into the socket 2, the protruding member 4 contacts and pushes open each unit of the retainer ring 5, so that each unit of the retainer ring 5 is retracted into the inflatable retainer groove 22, and the inflatable ring 6 is compressed. As shown in Figure 3 , when the protruding member 4 passes through the retainer ring 5 and enters the second avoiding groove 23, the inflatable ring 6 is inflated through the inflatable nozzle 61, the inflatable ring 6 expands and pushes each unit of the retainer ring 5, until the inner wall of the retainer ring 5 contacts the outer surface of the spigot 1, locks the inflatable nozzle 61, prevents the inflatable ring 6 from leaking, and the retainer ring 5 is clamped between the inflatable ring 6 and the spigot 1, as shown in Figure 1 .
[0048] In order to facilitate the protruding member 4 to push open the retainer ring 5 during the insertion of the spigot 1 into the socket 2, the end face of the retainer ring 5 facing the opening of the socket 2 is wedge-shaped or sloped. When the protruding member 4 contacts the slope and continues to advance, the retainer ring 5 moves towards the inflatable retainer groove 22.
[0049] The end face of the retainer ring 5 away from the opening of the socket 2 is a plane parallel to the radial direction. The plane can contact the protruding member 4 and transmit axial thrust force between the plane and the protruding member 4, so as to realize the sequential pulling of the pipes.
[0050] When the spigot 1 and the socket 2 are coaxial, there is a gap between the inner wall of the socket 2 at the first avoiding groove 21 and the spigot 1, and there is a gap between the protruding member 4 and the inner wall of the socket 2 at the second avoiding groove 23. The inflated inflatable ring 6 has a certain elasticity. These features allow the adjacent two pipes to be relatively deflected to a certain extent, as shown in Figure 4The position state of the spigot 1 after the pipe material where the spigot 1 is located deflects clockwise relative to the pipe material where the socket 2 is located is shown, and the state after counterclockwise deflection is axially symmetrical to the clockwise deflection. In this way, the self-anchoring structure can adapt to the relative deflection of the two adjacent pipe materials due to external factors during the pipe material construction process or the use process.
[0051] Finally, it is necessary to point out here that the above examples are only used to further detail the technical solutions of the present application and cannot be understood as limiting the protection scope of the present application. Some non-essential improvements and adjustments made by the skilled in the art based on the above content of the present application all belong to the protection scope of the present application.
Claims
1. An inflatable self-anchoring structure for dragging a pipe, comprising a spigot (1) and a socket (2), wherein the spigot (1) is inserted into the socket (2), and is characterized in that: The self-anchoring structure further comprises a protrusion (4), a stop ring (5), and an inflatable ring (6). The protrusion (4) is fixedly mounted on the outer surface of the socket (1). The inner surface of the socket (2) is provided with an inflatable stop groove (22) which is a groove. The stop ring (5) and the inflatable ring (6) are arranged in the inflatable stop groove (22). The inflatable ring (6) is expanded by inflation to clamp the stop ring (5) between the inflatable ring (6) and the socket (1), so that the stop ring (5) extends out of the inflatable stop groove (22) and contacts the protrusion (4). The stop ring (5) and the protrusion (4) can contact and transmit axial thrust, and the axial thrust realizes the sequential dragging of adjacent pipes.
2. The self-anchoring structure according to claim 1, characterized in that: The stop ring (5) comprises at least two arc-shaped unit components, and the unit components can be sequentially spliced into a circular ring structure, and the inner diameter of the spliced circular ring structure is smaller than the outer diameter of the protruding component (4).
3. The self-anchoring structure according to claim 1, characterized in that: The socket (2) is further provided with an air filling hole (26), which is a radial through hole connected to the air filling stop groove (22).
4. The self-anchoring structure according to claim 3, characterized in that: The inflatable ring (6) is provided with an inflating nozzle (61), through which gas is inflated into the inflatable ring (6) or discharged from the inflatable ring (6), and the inflating nozzle (61) is arranged in the inflating hole (26).
5. The self-anchoring structure according to claim 1, characterized in that: An end surface of the retaining ring (5) facing the opening of the socket (2) is set as an inclined surface.
6. The self-anchoring structure according to any one of claims 1 to 5, characterized in that: The inner wall of the socket (2) is provided with a first avoidance groove (21), an inflation stop groove (22), a second avoidance groove (23), and a blocking portion (24) in sequence from the end face toward the direction away from the end face. The first avoidance groove (21) and the second avoidance groove (23) are used to avoid the protrusion (4) so that after the socket (1) is inserted into the socket (2), the protrusion (4) can enter the second avoidance groove (23).
7. The self-anchoring structure according to claim 6, characterized in that: The inner diameter of the bell mouth (2) at the inflation stop groove (22) is larger than the inner diameter of the bell mouth (2) at the first avoidance groove (21), the inner diameter of the bell mouth (2) at the first avoidance groove (21) is not smaller than the inner diameter of the bell mouth (2) at the second avoidance groove (23), and the outer diameter of the protrusion (4) is smaller than the inner diameter of the bell mouth (2) at the second avoidance groove (23) and larger than the inner diameter of the bell mouth (2) at the blocking portion (24).
8. The self-anchoring structure according to claim 6, characterized in that: The width of the stop ring (5) is not greater than the width of the inflation stop groove (22), the width of the protrusion (4) is less than the width of the second avoidance groove (23), the width of the stop ring (5) refers to the axial dimension of the stop ring (5), the width of the protrusion (4) refers to the axial dimension of the protrusion (4), the width of the inflation stop groove (22) refers to the dimension of the inflation stop groove (22) in the axial direction of the socket (2), and the width of the second avoidance groove (23) refers to the dimension of the second avoidance groove (23) in the axial direction of the socket (2).
9. The self-anchoring structure according to claim 1, characterized in that: The self-anchoring structure further comprises a sealing ring (7), which is compressed between the spigot (1) and the socket (2).