Inflatable rubber tires and cast pipe lining components for cast pipe lining assemblies

Abstract

This application provides an inflatable rubber tire for a cast pipe lining assembly, characterized by comprising: a molded wall, an expansion wall, and a contact wall connected to each other, wherein the molded wall is configured to contact and abut against the port of the cast pipe, the expansion wall is adapted to expand within a space defined by a frame, and the contact wall is adapted to contact and abut against the frame, wherein the expansion wall comprises a first expansion wall portion, a second expansion wall portion, and a third expansion wall portion connected in sequence, wherein, in the non-inflated state, the included angle between the inner surface of the first expansion wall portion and the inner surface of the second expansion wall portion is between 0 and 90 degrees, and the second expansion wall portion does not contact the frame. This application also provides a cast pipe lining assembly.

Description

Technical Field

[0001] This application relates to an inflatable rubber tire for a cast iron pipe lining assembly. Additionally, this application also relates to a cast iron pipe lining assembly comprising an inflatable rubber tire. Background Technology

[0002] Cast iron pipes, also known as cast iron pipes, are widely used in pipelines for transporting fluids, including liquids and / or gases (such as water supply and drainage, energy fluids, etc.). When cast iron pipes are used for transporting such fluids over extended periods, they may wear down, age, or even break down due to various factors, including the corrosiveness of the fluid itself and / or its impurities, and / or the surrounding geological environment where the pipes are laid. However, laying such cast iron pipes requires significant manpower and resources; therefore, it is desirable to extend the corrosion resistance and service life of the pipes as much as possible. Consequently, existing technology often employs a cement coating on the inner wall of the cast iron pipe for protection.

[0003] However, due to limitations of existing equipment, current spin coating methods cannot completely cover the inner wall of the cast pipe, leaving uncoated portions at the ends. While these portions can be coated manually later, the strength, hardness, and robustness of manual coating are far inferior to spin coating, making them prone to breakage or peeling. Consequently, these uncoated portions of the cast pipe corrode earlier than other parts, and as corrosion intensifies, it inevitably negatively impacts the spin-coated portions, causing them to corrode earlier than expected due to the presence of the spin-coated coating. This situation is something that should be avoided.

[0004] In view of, but not limited to, the above-mentioned situations, it is desirable to provide a novel cast pipe lining assembly and / or an inflatable rubber tire for a cast pipe lining assembly to solve or at least alleviate the above-mentioned problems. Utility Model Content

[0005] This application aims to provide an inflatable rubber tire for cast pipe lining assemblies, which is advantageous over the prior art in at least one respect.

[0006] To this end, this application provides, in one aspect, an inflatable rubber tire for a cast pipe lining assembly, characterized by comprising: a molding wall, an expansion wall, and a contact wall connected to each other, wherein the molding wall is configured to contact and abut against a port of the cast pipe, the expansion wall is adapted to expand within a space defined by a frame, and the contact wall is adapted to contact and abut against the frame, wherein the expansion wall comprises a first expansion wall portion, a second expansion wall portion, and a third expansion wall portion connected in sequence, wherein, in a non-inflated state, the angle between the inner surface of the first expansion wall portion and the inner surface of the second expansion wall portion is between 0 and 90 degrees, and the second expansion wall portion does not contact the frame.

[0007] In one feasible exemplary embodiment, the second portion of the expansion wall is securely abutted against the skeleton in a fully inflated state.

[0008] In one feasible exemplary embodiment, in the non-inflated state, the included angle between the outer surface of the first portion of the expansion wall and the outer surface of the second portion of the expansion wall is between 90 and 180 degrees and / or the included angle has a chamfered or rounded structure.

[0009] In one feasible exemplary embodiment, the inflatable rubber tire for the cast pipe lining assembly further includes an anti-slip structure disposed on the molded wall and having a serrated structure in the shape of barbs or flat barbs.

[0010] In one feasible exemplary embodiment, an anti-slip structure is also included, which is formed in any of the following ways: a square serrated structure, closely arranged circular protrusions, dispersedly arranged circular protrusions, and / or a plurality of anti-slip rings arranged in succession.

[0011] In one feasible exemplary embodiment, a soft region is arranged on a first portion of the molded wall, the soft region having a higher coefficient of friction relative to the molded wall.

[0012] In one feasible exemplary embodiment, a rigid material layer is arranged on the third portion of the molding wall such that when the cast pipe contacts the third portion of the molding wall, the rigid material layer can support the cast pipe and prevent the end of the cast pipe from sinking into the inflatable rubber tire.

[0013] In another aspect, this application provides a cast pipe lining assembly characterized by comprising: a skeleton, and an inflatable rubber tire according to the cast pipe lining assembly as described above, wherein the inflatable rubber tire is configured to be fastened in the skeleton, wherein the skeleton has a plurality of slits evenly arranged radially along the circumference.

[0014] In one feasible exemplary embodiment, a connecting ring band is also positioned on the skeleton, and a circular opening is provided between the connecting ring band and the slot to reduce the pressure of the slot on the connecting ring band when the cast pipe is installed into the cast pipe lining assembly, thereby alleviating the stress concentration effect.

[0015] In one feasible exemplary embodiment, the skeleton is further provided with fastening rings configured to enhance the formability and / or strength of the skeleton. The fastening rings are positioned at the top and bottom of the outer end wall, and the cross-sectional shape of the fastening rings is selected from any one of the following: circular, square, rectangular, and / or strip-shaped.

[0016] In one feasible exemplary embodiment, the fastening ring is positioned at the top, bottom, and middle of the outer end wall.

[0017] The inflatable rubber pad and / or casting pipe lining assembly according to this application enable the casting pipe to achieve complete coating coverage by spin coating, especially for the ends of the casting pipe, thereby avoiding or at least reducing subsequent manual coating operations, thus improving the efficiency of casting pipe lining and simultaneously improving the quality of casting pipe lining, enhancing the effectiveness and robustness of the casting pipe, and many other advantages. Attached Figure Description

[0018] Figure 1 A cast pipe lining assembly according to one embodiment of this application is shown, in its uninflated state.

[0019] Figure 2 It shows that according to Figure 1 The cast pipe lining assembly shown is illustrated in its state after being filled with gas.

[0020] Figure 3 A cast pipe lining assembly according to another embodiment of this application is shown, in an uninflated state.

[0021] Figure 4 It shows that according to Figure 3 The cast pipe lining assembly shown is illustrated in its state after being filled with gas.

[0022] Figure 5 A pipe lining assembly according to yet another embodiment of this application is shown.

[0023] Figure 6 It shows that according to Figure 5 The cast pipe lining assembly shown is illustrated in its state after being filled with gas.

[0024] Figures 7-14Several embodiments of an inflatable rubber tire for a cast pipe lining assembly according to this application are shown.

[0025] Figure 15 A pipe lining assembly according to another embodiment of this application is shown.

[0026] Figure 16 It shows that according to Figure 15 The cast pipe lining assembly shown is illustrated in its state after being filled with gas.

[0027] Figure 17 A skeleton for a pipe lining assembly according to one embodiment of this application is shown, with a top view, as well as cross-sections along line AA and line BB. Detailed Implementation

[0028] Some feasible embodiments of this application are described below with reference to the accompanying drawings. It should be noted that the drawings are not drawn to scale. Some details may be enlarged for clarity, while some details that are not necessary to show have been omitted.

[0029] like Figure 1-2 As shown, a pipe lining assembly (also referred to as a plug device) 100 according to various embodiments of this application is illustrated. The pipe lining assembly 100 is configured to be fastened to a pipe 400, and by applying a force, the pipe 400 and the pipe lining assembly 100 rotate together, so that the cement grout poured inside the pipe 400 can be uniformly and neatly coated on the inner wall of the pipe 400 by the pressure generated by this rotation.

[0030] The pipe lining assembly 100 includes a frame 200 and an inflatable rubber tire 300. The inflatable rubber tire 300 is configured to be securely fastened within the frame 200. The inflatable rubber tire 300 has a deflatable state and a fully inflated state. For example, when the inflatable rubber tire 300 is in the deflatable state, it is configured to be inserted (e.g., manually by an operator) into a corresponding support space within the frame 200. As another example, when the inflatable rubber tire 300 is in the fully inflated state, it is configured to be securely fastened to the frame 200, for example, preventing the operator from manually removing the inflatable rubber tire 300 from the frame.

[0031] The strength and / or stiffness of the skeleton 200 can be configured to be greater than that of the inflatable tire 300. For example, the material comprising or constituting the skeleton 200 may be nylon. As another example, the material comprising or constituting the inflatable tire 300 may be rubber, which may be synthetic or natural rubber. The rubber may have a Shore hardness of 60-70.

[0032] The inflatable rubber pad 300 may have a generally annular shape and an L-shaped cross-section arranged in opposite directions along the axial direction (in the case where the pipe coating assembly 100 is fitted to the pipe 400, the axial direction of the pipe 400). In this way, it particularly has a port shape suitable for use with the pipe 400. The inflatable rubber pad 300 is configured such that, when the pipe coating assembly 100 is mounted to the port of the pipe 400, the inflatable rubber pad 300 can abut against and support the port of the pipe 400, while simultaneously preventing adverse effects on subsequent spin coating operations (e.g., incomplete coating, and / or coating peeling off by the inflatable rubber pad 300, especially at the port edges).

[0033] The interior of the inflatable rubber tire 300 is hollow to accommodate an expansion medium, which includes, but is not limited to, air, inert gas, etc.

[0034] The inflatable rubber tire 300 also includes a tension ring 310 located within its hollow interior. The tension ring 310 may be made of the same or different material as the inflatable rubber tire 300, for example, rubber or any other suitable material. The tension ring 310 divides the interior of the inflatable rubber tire 300 into a first chamber and a second chamber. For example, the first chamber extends generally axially, while the second chamber extends generally radially. At least one vent hole 320 is distributed on the tension ring 310. The at least one vent hole 320 connects the first chamber and the second chamber. The size and / or shape of the at least one vent hole 320 can be any suitable size and shape, including but not limited to circular, elliptical, etc. When there are two or more vent holes 320, the size and / or shape of each vent hole 320 may be the same or different. One possibility is that the vent holes 320 connect the first chamber and the second chamber such that both the first and second chambers can fully expand during inflation and fully retract during deflation.

[0035] The inflatable rubber tire 300 includes a molding wall 301, an expansion wall 302, and a contact wall 303 connected to each other. The molding wall 301, expansion wall 302, and contact wall 303 can together form the inflatable rubber tire 300.

[0036] Specifically, the forming wall 301 is suitable for the cast pipe 400. The forming wall 301 is configured to contact and abut against the port of the cast pipe 400, such as... Figure 2 As shown. The expansion wall 302 is adapted to have strong elasticity and the ability to expand, especially within the space defined by the frame 200. The contact wall 303 is adapted to contact and abut against the frame 200.

[0037] In one case, the opposite ends of the cast iron pipe 400 are configured as a spigot end and a socket end, respectively. The spigot end of one cast iron pipe 400 can be configured to be inserted into the socket end of another cast iron pipe 400, thereby allowing the cast iron pipes 400 to be interconnected to form a fluid pipeline.

[0038] Accordingly, one possibility is that the contact wall 303 is sized and / or shaped to fit the spigot end of the cast pipe 400. Another possibility is that the contact wall 303 is sized and / or shaped to fit the socket end of the cast pipe 400. Additionally, it is conceivable that a contact wall 303 can be configured to fit both the spigot and socket ends. This would improve the manufacturing and / or usage efficiency of the inflatable tire 300 while simultaneously reducing the corresponding costs.

[0039] The inflatable rubber tire 300 also includes an inflation nozzle 304. The inflation nozzle 304 can be disposed on the contact wall 303, and the inflatable rubber tire 300 can be inflated and / or deflated through the inflation nozzle 304.

[0040] As shown in the figures, the molded wall 301 of the inflatable rubber tire includes a first molded wall portion 301a, a second molded wall portion 301b, and a third molded wall portion 301c connected in sequence.

[0041] The first portion 301a of the molded wall can extend substantially along the axial direction. When the cast pipe lining assembly 100 is installed onto the cast pipe 400, the first portion 301a of the molded wall fits against the outer surface of the cast pipe 400. When the inflatable tire 300 is inflated, the first portion 301a of the molded wall applies pressure inward in the radial direction, causing the first portion 301a of the molded wall to abut against and tightly adhere to the outer surface of the cast pipe 400.

[0042] The second portion 301b of the molding wall can be molded into a chamfered shape to fit the end of the cast pipe 400. When the cast pipe lining assembly 100 is installed onto the cast pipe 400, the second portion 301b of the molding wall fits into the chamfered surface of the cast pipe 400. When the inflatable tire 300 is inflated, the second portion 301b of the molding wall abuts against and fits tightly against the chamfered surface of the cast pipe 400.

[0043] The third portion 301c of the molding wall can be molded to fit the end face of the cast pipe 400 (extending radially in the opposite direction). When the cast pipe lining assembly 100 is installed onto the cast pipe 400, the third portion 301c of the molding wall fits into the end face of the cast pipe 400. When the inflatable tire 300 is inflated, the third portion 301c of the molding wall contacts the end face of the cast pipe 400 and applies pressure in the axial inward direction, so that it abuts against and fits tightly against the end face of the cast pipe 400.

[0044] like Figure 15 and Figure 16 As shown, a rigid material layer 301e is disposed on the third portion 301c of the molding wall, such that when the cast pipe contacts the third portion 301c of the molding wall, the rigid material layer 301e can support the cast pipe and prevent the end of the cast pipe from sinking into the inflatable rubber tire, especially the molding wall of the inflatable rubber tire. The rigid material layer can be a rigid rubber layer, which can have a Shore hardness of 80-90 degrees.

[0045] In one embodiment, the third portion 301c of the molded wall is configured to, when used in conjunction with the cast tube 400 while the inflatable rubber tire 300 is inflated, form a neat and smooth coated end surface at the end of the cast tube 400 with the lining layer 500. For example, the angle between the third portion 301c of the molded wall and the axial direction can be between 30-45 degrees, 30-90 degrees, 45-90 degrees, 60-90 degrees, 70-90 degrees, or 80-90 degrees.

[0046] In one embodiment, the shape and / or size of the third portion 301c of the molded wall is configured such that, when used in conjunction with the cast tube 400 while the inflatable tire 300 is inflated, the liner 500 forms a neat and smooth coated end surface at the end of the cast tube 400. The angle between the third portion 301c of the molded wall and the axial direction can be between 30-45 degrees, 30-90 degrees, 45-90 degrees, 60-90 degrees, 70-90 degrees, or 80-90 degrees.

[0047] In one embodiment, the second portion 301b and the third portion 301c of the molded wall are configured together to, when used in conjunction with the cast tube 400 while the inflatable tire 300 is inflated, such that the lining layer 500 forms a neat and smooth coated end surface at the end of the cast tube 400. For example, the included angle can be between 30-45 degrees, 30-90 degrees, 45-90 degrees, 60-90 degrees, 70-90 degrees, or 80-90 degrees.

[0048] In one embodiment, the included angle between the outer surfaces of the second portion 301b and the third portion 301c of the molded wall is configured such that, when used in conjunction with the cast tube 400 while the inflatable tire 300 is inflated, the coating layer 500 forms a neat and smooth coated end surface at the end of the cast tube 400. For example, the included angle can be between 30-45 degrees, 30-90 degrees, 45-90 degrees, 60-90 degrees, 70-90 degrees, or 80-90 degrees.

[0049] like Figure 1 and Figure 2 As shown, the expansion wall 302 may include a first expansion wall portion 302a, a second expansion wall portion 302b, and a third expansion wall portion 302c connected in sequence.

[0050] The first portion 302a of the expansion wall extends substantially radially. The first portion 302a of the expansion wall includes two ends, one end connected to the molded wall 301 (specifically, connected to the third portion 301c of the molded wall) and the other end connected to the second portion 302b of the expansion wall, at which corner A is formed.

[0051] In the non-inflated state, the included angle between the inner surface of the first portion 302a of the expansion wall and the inner surface of the second portion 302b of the expansion wall can be between 0 and 90 degrees, for example, 30 degrees, 45 degrees, 60 degrees and / or 90 degrees, and the second portion 302b of the expansion wall does not contact the frame. In this way, after inflation, the inflatable tire, especially the second portion 302b of the expansion wall, is firmly abutted against the frame 200 (specifically the inner end wall 210 of the frame), thereby reducing or even avoiding the risk of detachment.

[0052] Furthermore, in the non-inflated state, the included angle between the outer surfaces of the first portion 302a and the second portion 302b of the expansion wall is not subject to the above limitations, for example, it can be between 0 and 90 degrees (e.g., 30 degrees, 45 degrees, 60 degrees and / or 90 degrees), or it can be between 90 and 180 degrees. The connection between the outer surfaces of the first portion 302a and the second portion 302b of the expansion wall may have a chamfered structure or a rounded corner structure.

[0053] like Figure 1 and Figure 2 As shown, the inner end wall 210 of the skeleton can be configured to extend parallel to the axial direction. In this case, in the non-inflated state, the second portion 302b of the expansion wall is inclined at an angle relative to the inner end wall 210 of the skeleton, for example, an acute angle, for example, between 30 and 60 degrees, such as 30 degrees, 45 degrees, or 60 degrees.

[0054] In addition, such as Figure 3 and Figure 4 As shown, the inner stop portion 210 of the frame 200 can also be configured to extend at an inclined angle to the axial direction. Accordingly, in the non-inflated state, the second portion 302b of the expansion wall is at an inclined angle relative to the inner stop portion 210 and extends in the opposite direction.

[0055] Furthermore, such as Figure 5 and Figure 6 As shown, the inner stop portion 210 of the frame 200 can also be configured to extend at an inclined angle to the axial direction. Accordingly, in the non-inflated state, the second portion 302b of the expansion wall is at an inclined angle relative to the inner stop portion 210 and extends parallel to the axial direction.

[0056] Optionally, the first portion 302a of the expansion wall has greater elasticity relative to the other portions constituting the inflatable tire (e.g., the molding wall and its portions, the contact wall and its portions, and / or the second and / or third portions of the expansion wall). In this way, the first portion 302a of the expansion wall can undergo greater deformation when the inflatable tire 300 is inflated. This allows the second portion 302b of the expansion wall to be more easily abutted against the frame.

[0057] The second portion 302b of the expansion wall extends at a certain (inclined) angle relative to the axial direction. The second portion 302b of the expansion wall includes two ends, which are connected to the first portion 302a of the expansion wall at one end (i.e., the connection with corner A) and connected to the third portion 302c of the expansion wall at the other end.

[0058] Optionally, the angle between the inner surface of the second part 302b of the expansion wall and the inner surface of the third part 302c of the expansion wall is between 90 and 180 degrees, for example: 150 degrees, 120 degrees, 100 degrees or 90 degrees.

[0059] The third part of the expansion wall 302c extends substantially in the axial direction. The third part of the expansion wall 302c is connected at one end to the second part of the expansion wall 302b and at the other end to the contact wall 303.

[0060] Optionally, the angle between the outer surface of the third part 302c of the expansion wall and the outer surface of the contact wall 303 is greater than 90 degrees.

[0061] The third part of the expansion wall, 302c, is basically attached to the skeleton and can extend along the axial direction when the inflatable rubber tire 300 is inflated.

[0062] like Figure 1 and Figure 2As shown, the contact wall 303 includes a first contact wall portion 303a, a second contact wall portion 303b, and a third contact wall portion 303c.

[0063] The first portion 303a of the contact wall extends substantially along the direction of the inner surface of the first section 311a, which extends radially and fits into the L-shaped top of the skeleton. The first portion 303a of the contact wall includes two ends. The first portion 303a of the contact wall is connected to the molded wall 301 at one end (near the radially inner side) and to the second portion 303b of the contact wall at the other end (near the radially outer side).

[0064] When the pipe lining assembly 100 is installed onto the pipe 400, the first portion 303a of the contact wall contacts the first section 311a of the L-shaped body of the skeleton. When the inflatable rubber tire 300 is inflated, the first portion 303a of the contact wall applies pressure to the first section 311a of the L-shape to ensure a tight fit.

[0065] The second portion 303b of the contact wall extends substantially along the direction of the inner surface of the axially extending second section 311b of the L-shape. The second portion 303b of the contact wall includes two ends. The second portion 303b of the contact wall is connected at one end to the first portion 303a of the contact wall and at the other end to the third portion 303c of the contact wall.

[0066] When the pipe lining assembly 100 is installed onto the pipe 400, the second portion 303b of the contact wall contacts the second section 311b of the L-shape. When the inflatable tire 300 is inflated, the second portion 303b of the contact wall applies pressure to the second section 311b of the L-shape to ensure a tight fit thereon.

[0067] The third portion 303 of the contact wall extends substantially along the inner surface of the third segment 311c, which extends radially to the bottom of the L-shape. The third portion 303c of the contact wall includes two ends. The third portion 303c of the contact wall is connected at one end to the second portion 303b of the contact wall and at the other end to the expansion wall 202.

[0068] When the pipe lining assembly 100 is installed onto the pipe 400, the third part 303c of the contact wall contacts the third section 311c of the L-shape. When the inflatable rubber tire 300 is inflated, the third part 303c of the contact wall applies pressure to the third section 311c of the L-shape to ensure a tight fit.

[0069] like Figure 7As shown, the inflatable rubber tire 300 may further include at least one anti-slip ring 330. The at least one anti-slip ring 330 may be disposed on the molding wall 301, preferably on the first portion 301a of the molding wall 301. The at least one anti-slip ring 330 is radially distributed around the casting pipe axis. When inflated, the at least one anti-slip ring 330 provides space to prevent wrinkles in the molding wall 301 due to expansion, which could affect the tight fit between the rubber tire and the casting pipe. The anti-slip ring 330 ensures that the casting pipe lining assembly 100 is securely fastened to the casting pipe 400, making it less prone to detachment even when the casting pipe is rotating at high speed.

[0070] like Figure 8-14 As shown, the inflatable rubber tire 300 may also include a further anti-slip structure 340. (See diagram) Figure 8 As shown, the anti-slip structure 340 is a serrated structure, especially a barbed structure (i.e., when the cast pipe is positioned in the inflatable tire, the tips of the teeth of the anti-slip structure 340 are angled toward the end of the cast pipe). This structure can be a series of serrated structures arranged in succession.

[0071] like Figure 9 As shown, the anti-slip structure 340 can be a plurality of anti-slip rings arranged in a continuous manner.

[0072] like Figure 10 As shown, the anti-slip structure 340 can be a serrated structure, but different from... Figure 8 As shown, this serrated structure is a flat-tooth structure, meaning that when the cast tube is positioned in the inflatable tire, the tips of the teeth of the anti-slip structure 340 are radially oriented. Other shapes of anti-slip structures are also conceivable. For example... Figure 11 The square sawtooth structure shown Figure 12 The closely arranged circular protrusions shown, and Figure 13 The diagram shows a dispersed arrangement of circular protrusions.

[0073] In addition, such as Figure 14 As shown, it is also conceivable that a soft region 301d of soft rubber and / or soft plastic with a higher coefficient of friction, such as having a Shore hardness of 30-50 degrees, is arranged on the molding wall (specifically the first part of the molding wall 301a), thereby enhancing the friction and preventing the cast pipe from slipping off the inflatable rubber tire during use.

[0074] like Figure 17 As shown, a skeleton 200 for lining cast pipes is also illustrated. The skeleton 200 has a generally annular shape and an L-shaped cross-section arranged in opposite directions along the axial direction.

[0075] The frame 200 can be provided with a plurality of slits 230 radially distributed along its circumference. The slits 230 can be evenly distributed. The slits 230 can extend through the outer end wall 220 of the frame. The slits 230 can be made using cutting methods known to those skilled in the art. The depth of the slits 230 can extend substantially over the entire length of the outer end wall 220, such as... Figure 17 As shown. Alternatively, it can be envisioned that the depth of the slit 230 extends only along a portion of the length of the outer end wall 220. In this way, it is easier to install the cast pipe lining assembly, including the skeleton, onto the cast pipe, especially when the roundness of the cast pipe is not standard.

[0076] In addition, a connecting ring 240 can be positioned on the frame 200 to prevent disorderly deformation of the frame after opening. The connecting ring 240 can be retained during the cutting and slit process, or other methods (such as subsequent installation) can be envisioned to form the connecting ring 240.

[0077] A (circular) opening 250 may also be provided between the connecting ring 240 and the slot 230. The opening 250 may be a through hole. When the cast pipe is installed into the cast pipe lining assembly, the opening 250 can reduce the pressure of the slot 230 on the connecting ring, thereby alleviating the stress concentration effect and preventing damage or even breakage of the connecting ring.

[0078] The frame 200 may further include or be provided with fastening rings 260. The fastening rings 260 are configured to enhance the formability and / or strength of the outer end wall 220 of the frame 200. The fastening rings 260 may be made of steel, i.e., fastening steel strips. The fastening rings 260 may be positioned at the top, bottom, and / or middle of the outer end wall 220. For example, the fastening rings 260 may be positioned at the top and bottom of the outer end wall 220, respectively. Alternatively, the fastening rings 260 may be further positioned in the middle of the outer end wall 220. Thus, the number of fastening rings is at least three, which can be positioned at the top, middle, and bottom, respectively. The cross-sectional shape of the fastening rings may be circular, square, rectangular, and / or elongated.

[0079] It should be noted that in this application, the terms "axial" and "radial" are defined relative to the direction of the cast pipe, oriented with respect to the central axis of the cast pipe. The terms "axial" and "radial" are descriptive (indicating only the relative direction of the components) and not restrictive in any way (i.e., not referring to a specific direction). The terms "axially inner" and "axially inward" refer to the direction toward the cast pipe. The terms "radially inner" and "radially inward" refer to the direction toward the axis of the cast pipe.

[0080] As used herein, the term "comprising" is open-ended and includes one or more of the stated features, elements, components, or functions, but does not exclude the presence or addition of one or more other features, elements, components, functions, or combinations thereof.

[0081] Within the scope of this application, it is expressly intended that the various aspects, embodiments, examples, and alternatives listed in the foregoing paragraphs, claims, and / or the following description and figures, in particular their individual features, may be carried out independently or in any combination. That is, all embodiments and / or features of any embodiment may be carried out in any manner and / or in combination, unless such features are incompatible. The applicant reserves the right to accordingly amend any originally filed claim or to file any new claim, including modifying any originally filed claim to dependent on and / or incorporate any feature of any other claim, even if not originally claimed in this way.

[0082] While this application has been described herein with reference to specific embodiments, the scope of this application is not limited to the details shown. Various modifications may be made to these details without departing from the basic principles of this application.

Claims

1. An inflatable rubber tire for a cast pipe lining assembly, characterized in that... include: A molding wall (301), an expansion wall (302), and a contact wall (303) are connected to each other, wherein the molding wall (301) is configured to contact and abut against the port of the cast pipe (400), the expansion wall (302) is adapted to expand within the space defined by the frame (200), and the contact wall (303) is adapted to contact and abut against the frame (200). The expansion wall (302) includes a first expansion wall portion (302a), a second expansion wall portion (302b), and a third expansion wall portion (302c) connected in sequence. In the non-inflated state, the angle between the inner surface of the first expansion wall portion (302a) and the inner surface of the second expansion wall portion (302b) is between 0 and 90 degrees, and the second expansion wall portion (302b) does not contact the frame (200).

2. The inflatable rubber tire for cast pipe lining assembly according to claim 1, characterized in that, When fully inflated, the second part (302b) of the expansion wall is securely abutted against the frame (200).

3. The inflatable rubber tire for a cast pipe lining assembly according to claim 1, characterized in that, In the non-inflated state, the included angle between the outer surface of the first part (302a) of the expansion wall and the outer surface of the second part (302b) of the expansion wall is between 90 and 180 degrees and / or the included angle has a chamfered or rounded structure.

4. The inflatable rubber tire for a cast pipe lining assembly according to any one of claims 1-3, characterized in that, It also includes an anti-slip structure (340), which is arranged on the molded wall and has a serrated structure in the shape of barbs or flat barbs.

5. The inflatable rubber tire for a cast pipe lining assembly according to any one of claims 1-3, characterized in that, It also includes an anti-slip structure (340), which is formed in any of the following ways: a square serrated structure, a closely arranged circular protrusion structure, a dispersedly arranged circular protrusion structure, and / or a plurality of anti-slip rings arranged in succession.

6. The inflatable rubber tire for a cast pipe lining assembly according to any one of claims 1-3, characterized in that, A soft region (301d) is arranged on the first part (301a) of the forming wall, the soft region having a higher coefficient of friction than the forming wall.

7. The inflatable rubber tire for a cast pipe lining assembly according to any one of claims 1-3, characterized in that, A rigid material layer (301e) is arranged on the third part (301c) of the molding wall, such that when the cast pipe contacts the third part (301c) of the molding wall, the rigid material layer (301e) can support the cast pipe and prevent the end of the cast pipe from sinking into the inflatable rubber tire.

8. A cast pipe lining assembly, characterized in that, include: Skeleton (200), and The inflatable rubber tire (300) for a cast pipe lining assembly according to any one of claims 1-7, wherein the inflatable rubber tire (300) is configured to be fastened within the skeleton (200). The skeleton (200) has a plurality of slits (230) evenly arranged radially along the circumference.

9. The cast pipe lining assembly according to claim 8, characterized in that, A connecting ring band (240) is also positioned on the skeleton (200), and a circular opening (250) is provided between the connecting ring band (240) and the slot (230) to reduce the pressure of the slot (230) on the connecting ring band (240) when the cast pipe is installed into the cast pipe lining assembly, so as to alleviate the stress concentration effect.

10. The cast pipe lining assembly according to claim 8 or 9, characterized in that, The skeleton (200) is also provided with fastening rings (260), which are configured to enhance the formability and / or strength of the skeleton (200). The fastening rings (260) are positioned at the top and bottom of the outer end wall (220), and the cross-sectional shape of the fastening rings (260) is selected from any one of the following: circular, square, rectangular and / or strip-shaped.

11. The cast pipe lining assembly according to claim 10, characterized in that, The fastening ring (260) is positioned at the top, bottom and middle of the outer end wall (220).

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