A beam section structure and preparation method thereof

Abstract

The present invention discloses a bundle joint structure and a preparation method thereof, which belongs to the technical field of bamboo composite pipe connection, wherein the setting of the inner lining layer in the bundle joint structure can be effectively avoided by the corresponding setting of the integral rubber ring, the preparation process of the bundle joint structure can be simplified, and the risk of leakage can be avoided, and the corresponding opening of the connection groove on the outer periphery of the integral rubber ring and the corresponding setting of the reinforcement layer can ensure the strength, integrity and reliability of the bundle joint structure while the bundle joint structure is quickly formed, and the stable docking of the bamboo composite pipe can be achieved. The bundle joint structure of the present invention has a simple structure and a convenient preparation method. The obtained bundle joint structure after forming has strong integrity and high reliability. It can effectively improve the sealing and reliability of the bundle joint structure while ensuring the use strength of the bundle joint structure, ensure the reliability of the bamboo composite pipe connection, extend the service life of the bamboo composite pipe connection structure, reduce the application cost and maintenance cost of the bamboo composite pipe, and has good practical value and promotion value.

Description

Technical Field

[0001] The invention belongs to the technical field of bamboo composite pipe connection, and particularly relates to a bundle joint structure and a preparation method thereof. Background Art

[0002] In people's daily life and industrial production, pipes are widely used. Common pipe connection methods include threaded connection, flange connection, welding, pipe socket connection, ferrule connection, hot melt connection and groove connection. These connection methods are widely used in various pipeline projects in many fields. However, for bamboo composite pipes, bamboo is used as the main raw material. Due to the particularity of bamboo, the existing interface connection method cannot be effectively applied.

[0003] In view of this, in the applicant's prior application CN 104266017A, a preparation method, an installation method and the tube bundle section for connecting bamboo composite pipes are proposed. Through the specially designed tube bundle section structure, the connection of bamboo composite pipes can be effectively achieved, which meets the connection requirements of bamboo composite pipes to a certain extent. However, the applicant found that the above-mentioned bundle section has the defects of stress concentration and poor molding quality when used. Therefore, in the subsequent patent CN 110375134 A, the connection structure of bamboo composite pipes was improved accordingly, and the sealing ring was changed to the end of the connecting pipe, which avoided the stress concentration at the position of the sealing ring of the bundle section to a certain extent, and improved the setting stability of the connection structure of bamboo composite pipes.

[0004] However, with the further development of bamboo composite pipe connection technology, the applicant has found that the existing technology of slotting the spigot or bundle and embedding the sealing ring also has obvious defects. First, the preparation process of the above-mentioned bundle or bamboo composite pipe connection structure is cumbersome, and the manufacturing and use costs of the product are high, which is not conducive to the large-scale promotion of bamboo composite pipes and limits the promotion and application of bamboo composite pipes; secondly, during the installation of the bundle, the bundle and the spigot of the pipe are very likely to damage the inner lining of the bundle when they come into contact, affecting the normal use of the bundle, causing the risk of leakage in the connected structure, and increasing maintenance costs. Summary of the invention

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a bundle joint structure and a preparation method thereof, wherein the corresponding setting of the integral rubber ring effectively avoids the setting of the inner lining layer in the traditional bundle joint structure, simplifies the setting process of the bundle joint structure, and avoids the risk of leakage of the bundle joint structure. The corresponding setting of the connecting groove and the corresponding matching of the reinforcing layer and the integral rubber ring effectively ensure the integrity and strength of the bundle joint structure, and improve the reliability and stability of the bamboo composite pipe connection structure.

[0006] To achieve the above object, one aspect of the present invention provides a beam segment structure, characterized in that it includes an integral rubber ring and a reinforcement layer sequentially arranged from the inside to the outside in the radial direction;

[0007] The integral rubber ring comprises a body in a tubular structure, an inner wall surface of the body is provided with an internal stopper in the circumferential direction, and the internal stopper is provided with at least one spur on both sides along the axial direction of the bundle segment structure;

[0008] The spur is an annular structure arranged along the inner circumference of the body, the outermost side of which is closely connected to the inner circumferential wall of the body, and the distance between each position on the annular structure and the plane where the internal stop is located decreases as the inner diameter of the spur decreases, that is, the inner side of the spur points to the side of the internal stop; a connecting groove is opened on the outer circumferential wall of the body along the annular direction, and the connecting groove is one or a plurality of connecting grooves spaced apart in the axial direction;

[0009] The reinforcing layer is wound and bonded on the outer peripheral wall of the main body, and includes port stops arranged on the outer peripheral walls at both ends of the main body, a glass fiber layer arranged between the two port stops, and a bamboo strip layer arranged on the outer peripheral wall of the glass fiber layer; the glass fiber layer has a radial thickness less than the thickness of the port stop, and is formed by winding and bonding the glass fiber material on the outer peripheral wall of the main body, and each of the connecting grooves is filled with the wound and bonded glass fiber material; the bamboo strip layer is wound and bonded on the outer peripheral wall of the glass fiber layer, and its two end surfaces along the axial direction are respectively tightly attached to the side wall of the corresponding port stop.

[0010] As a further improvement of the present invention, the thickness of the bamboo strips layer is not less than half of the thickness of the reinforcement layer.

[0011] As a further improvement of the present invention, the bamboo strips layer is formed by alternately winding and bonding circumferential bamboo strips and axial bamboo strips in the radial direction, and the total winding thickness of the circumferential bamboo strips is greater than the total winding thickness of the axial bamboo strips.

[0012] As a further improvement of the present invention, the port baffle is formed by winding and bonding a single annular bamboo strip or a plurality of annular bamboo strips.

[0013] As a further improvement of the present invention, flanges are respectively provided at both ends of the body; and the two flanges are obtained by respectively extending the two ends of the body radially outward for a certain length and then extending axially towards each other for a certain length.

[0014] As a further improvement of the present invention, the port stop abuts against the inner circumferential wall of the flange with its side wall, and the two ends of the bamboo strip layer respectively extend into the annular groove formed by the flange, and the outer circumferential wall of the end abuts against the inner circumferential wall of the flange.

[0015] As a further improvement of the present invention, the opening width of the connecting groove is smaller than the maximum value of the axial width of the connecting groove.

[0016] As a further improvement of the present invention, the cross section of the connecting groove is trapezoidal, and the width of its opening is equal to the length of the shorter side of the two parallel sides of the trapezoid.

[0017] As a further improvement of the present invention, an outer protective layer is arranged on the outer peripheral wall surface of the reinforcing layer, and the outer protective layer is obtained by applying a protective coating on the outer peripheral wall surfaces of the port baffle and the bamboo strips layer, or by winding and bonding a bamboo fiber material on the outer peripheral wall surface of the reinforcing layer and then applying a protective material.

[0018] As a further improvement of the present invention, a groove of a certain depth is formed in a circumferential direction on the inner peripheral wall surface of the spur on one side close to the inner stop.

[0019] Another aspect of the present invention provides a method for preparing a beam node structure, which is used for preparing the beam node structure, and the steps are as follows:

[0020] (1) An integral rubber ring having an internal stop, spurs and connecting grooves is formed for use;

[0021] (2) The integral rubber ring is mounted on a special mold, and the end stoppers are respectively wound around the outer peripheral wall surfaces at both ends of the integral rubber ring;

[0022] (3) Winding and bonding glass fiber materials in each connection groove respectively, and after each connection groove is filled with glass fiber materials, winding and bonding a certain thickness of glass fiber materials on the outer peripheral wall surface of the body between the two port baffles to form a glass fiber layer;

[0023] (4) Winding and bonding a plurality of layers of bamboo strips material on the outer peripheral wall surface of the glass fiber layer to form a bamboo strip layer whose two end surfaces respectively abut against the side wall surface of the port baffle;

[0024] (5) After the port stopper, the bamboo strip layer and the glass fiber layer are solidified and formed, a reinforcement layer is obtained which forms a whole with the integral rubber ring, and then demolding is performed to obtain a bundle node structure.

[0025] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0026] In general, the above technical solution conceived by the present invention has the following beneficial effects compared with the prior art:

[0027] (1) The bundle joint structure of the present invention effectively avoids the setting of the inner lining layer in the bundle joint structure through the corresponding setting of the integral rubber ring, simplifies the preparation process of the bundle joint structure, avoids the leakage problem caused by damage to the inner lining layer of the traditional bundle joint structure, and improves the stability and reliability of the bamboo composite pipe connection structure; at the same time, through the setting of the connection groove on the outer peripheral wall surface of the integral rubber ring and the corresponding setting of the glass fiber layer, the reinforcing layer and the integral rubber ring can be effectively connected stably, avoiding the separation of the reinforcing layer and the integral rubber ring due to axial force or radial force, ensuring the integrity of the bundle joint structure after preparation, ensuring the strength and stability of the bundle joint structure, extending the service life of the bamboo composite pipe connection structure, and reducing the application cost and maintenance cost of the bamboo composite pipe;

[0028] (2) The bundle joint structure of the present invention is provided with flanges at both ends of the integral rubber ring, and the port stopper in the reinforcement layer is covered in the annular groove formed by the flanges, and the two ends of the bamboo strip layer are respectively embedded in the annular grooves, so as to achieve a stable arrangement of the reinforcement layer, fully avoid the separation of the integral rubber ring and the reinforcement layer, and at the same time ensure the integrity, sealing and strength of the bundle joint structure, thereby extending the service life of the bundle joint structure;

[0029] (3) The bundle joint structure of the present invention is configured such that the opening width of the connection groove is smaller than the maximum width, and is further preferably configured such that the opening of the connection groove is a short side of two parallel sides of the trapezoid. By using the above configuration, after the glass fiber material fills the connection groove, the connection groove can limit the glass fiber layer axially and radially, thereby avoiding the separation of the integral rubber ring and the reinforcement layer, and ensuring the integrity and stability of the bundle joint structure.

[0030] (4) The bundle-node structure of the present invention has a simple structure and a convenient preparation method. The bundle-node structure obtained after molding has strong integrity and high reliability. While ensuring the use strength of the bundle-node structure, it can effectively improve the sealing and reliability of the bundle-node structure, ensure the stable connection of the bamboo composite pipe, extend the service life of the bamboo composite pipe connection structure, and reduce the application cost and maintenance cost of the bamboo composite pipe. It has good practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural cross-sectional view of a beam section structure in an embodiment of the present invention;

[0032] Figure 2 is a structural cross-sectional view of the beam section structure in the embodiment of the present invention when in operation;

[0033] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Integral rubber ring, 101. First spur, 102. Second spur, 103. Baffle, 104. Connecting groove, 105. Flanged edge; 2. Reinforcement layer, 201. Glass fiber layer, 202. Bamboo strip layer, 203. Port baffle; 3. Pipe, 3a. First pipe, 3b. Second pipe, 301. First sealing groove, 302. Second sealing groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Example:

[0040] See also Figure 1 , 2 The bundle structure in the preferred embodiment of the present invention is composed of an integral rubber ring 1 and a reinforcement layer 2. The integral rubber ring 1 includes a tubular body, which is made of heat-resistant rubber, has good heat resistance and certain elastic deformation performance, and each part of the body has a certain thickness in the radial direction to ensure the stability of its structure. Specifically, the compression rate of the rubber ring in the preferred embodiment 1 is 25% to 35%, and the international rubber hardness index (IRHD) of the rubber ring is 45 to 60.

[0041] Furthermore, a stopper 103 of a certain thickness is arranged along the annular direction on the inner side of the middle part of the body, which is used to abut the ends of the sockets of the two bamboo composite pipes to be connected to achieve the limit position of the sockets; at least one thorn structure is arranged on both sides of the stopper 103, and the thorn is a circular ring structure arranged along the annular direction. The outer side of the circular ring structure corresponding to the outer peripheral wall surface is fixed on the inner peripheral wall surface of the body, and the inner side thereof extends toward the side close to the stopper 103, such as Figure 1 As shown in ; from another perspective, the spurs in the preferred embodiment can be regarded as a convex ring arranged on the inner circumferential wall surface of the main body, the outer circumferential wall surface of the convex ring is fixedly connected to the inner wall surface of the main body, and the axial thickness of the convex ring decreases continuously as the diameter decreases, and the distance between each position of the convex ring and the plane where the baffle 103 is located decreases continuously as the diameter decreases.

[0042] Furthermore, in a preferred embodiment, the stopper 103 has at least two spurs on both sides of the body along the axial direction. In a preferred embodiment, the stopper 103 has two spurs on either side, namely, a first spur 101 and a second spur 102. Figure 1As shown in . Obviously, the number of spurs can be set not only to the above two, but also to one or more than two according to actual needs, which can be set accordingly according to the length of the bundle section and the length of the socket. Accordingly, the first spur 101 and the second spur 102 are arranged at intervals in the axial direction, and a groove is arranged along the circumferential direction on the side of each spur close to the stop 103, so that the inner side of each spur can be deformed accordingly when acted by radial force and can be accommodated in the groove on one side accordingly, so as to ensure that the socket can be inserted into the bundle section accordingly.

[0043] Furthermore, a plurality of connecting grooves 104 are axially spaced apart on the outer peripheral wall of the main body for stable connection between the outer peripheral wall of the main body and the reinforcing layer 2. In a preferred embodiment, the connecting grooves 104 are circumferentially arranged, and the number of the connecting grooves 104 corresponds to the number of spurs and baffles; specifically, one connecting groove 104 is arranged for each spur, and is arranged on the outside of the spur setting position; and two connecting grooves 104 are arranged for the baffle 103, and the two connecting grooves are arranged on the outer peripheral wall on both sides of the baffle 103, and are preferably symmetrically arranged with respect to the baffle 103. Furthermore, in a preferred embodiment, the thickness of the main body at the position where the connecting groove 104 is arranged is not less than the minimum value of the main body wall thickness at the position where the connecting groove 104 is not arranged. Obviously, with Figure 1 It can be seen from the shown content that at the connection groove 104 corresponding to the spur, due to the setting of the spur, the minimum thickness of the connection groove 104 at the opening position can be not less than the thickness of the main body at the flat surface between the two connection grooves 104; at the same time, the connection grooves 104 arranged on the outer periphery of both sides of the baffle 103 do not have grooves on the inner peripheral wall surface of the main body corresponding to the opening position, nor are there spur structures.

[0044] Through the above arrangement, an integral rubber ring 1 with thorns and baffles can be obtained, whose length is not less than the sum of the lengths of the socket ends of the two bamboo composite tubes, and whose two ends can be respectively sleeved on the outer periphery of the sockets of the two bamboo composite tubes to achieve the corresponding connection of the two bamboo composite tubes. At the same time, the thorns (101, 102) and baffles 103 in the integral rubber ring 1 are preferably formed integrally with the body to improve the stability and reliability of the force of the integral rubber ring 1; and the arrangement of the thorns and baffles is simple, with high stability, and the opening of the connection groove is completed in the molding process of the rubber ring or opened in a corresponding manner after molding, which is easy to achieve using existing technology, greatly simplifying the preparation process of the bundle section.

[0045] Furthermore, a reinforcement layer 2 is correspondingly arranged on the outer periphery of the body, and it is combined with the integral rubber ring 1 to form a tubular bundle structure, which is used to provide support from the outside to support the integral rubber ring 1 to form a regular tubular structure. The innermost side of the reinforcement layer 2 corresponds to each connection groove 104 and is formed with a corresponding "convex ring" structure, which is correspondingly embedded in and fills the connection groove 104, such as Figure 1As shown in . The corresponding arrangement of the connection groove 104 enables a stable connection between the integral rubber ring 1 and the reinforcing layer 2, and prevents the integral rubber ring 1 and the reinforcing layer 2 from being separated due to the force acting in the axial direction, thereby ensuring the integrity of the bundle segment structure.

[0046] Further preferably, in order to prevent the integral rubber ring 1 and the reinforcing layer 2 from being separated by radial force, the connecting groove 104 in the preferred embodiment is configured to have an opening width that is smaller than the maximum width of the connecting groove 104, and further preferably, the width of the opening position of the connecting groove 104 is the minimum width of the connecting groove 104. Specifically, the connecting groove 104 in the preferred embodiment is an annular groove with a trapezoidal cross section, and the width of the opening of the connecting groove 104 just corresponds to the length of the shorter side of the two parallel sides of the trapezoid, such as Figure 1 As shown in . With the above arrangement, the reinforcing layer 2 and the integral rubber ring 1 can be connected and fastened by the reinforcing layer material embedded in the connection groove 104, so as to prevent the integral rubber ring 1 from being separated from the reinforcing layer 2 due to radial force, and ensure that the integral rubber ring 1 and the reinforcing layer 2 are always in an integral tubular structure. Of course, in order to ensure the tight connection between the integral rubber ring 1 and the reinforcing layer 2, an adhesive, such as an adhesive resin, can also be applied between the inner peripheral wall surface of the reinforcing layer 2 and the outer peripheral wall surface of the integral rubber ring 1 to achieve the connection and fastening between the integral rubber ring 1 and the reinforcing layer 2.

[0047] In order to further improve the matching stability between the reinforcing layer 2 and the integral rubber ring 1, in a preferred embodiment, flanges 105 of a certain length are respectively turned outward at both ends of the integral rubber ring 1, and the flanges 105 are obtained by extending the two ends of the integral rubber ring 1 radially outward by a certain width and then extending them axially toward each other by a certain length. By setting the two flanges 105, after the reinforcing layer 2 is correspondingly set, the inner peripheral wall surfaces of the two flanges 105 can be closely attached to the end surface and the outer peripheral wall surface of the end of the reinforcing layer 2, so as to achieve the covering of the two ends of the reinforcing layer 2, which can further ensure the connection stability between the integral rubber ring 1 and the reinforcing layer 2, and avoid the separation of the two in the axial and radial directions.

[0048] More specifically, the strengthening layer 1 in the preferred embodiment is as follows Figure 1 As shown in , it includes a glass fiber layer 201, a bamboo strip layer 202 and a port stop 203. Among them, the glass fiber layer 201 is the base layer, which is correspondingly wound and bonded on the outer peripheral wall surface of the integral rubber ring 1, and correspondingly embedded in and fills each connection groove 104, and the glass fiber layer 201 extends outward from the outer peripheral wall surface of the integral rubber ring 1 by a certain thickness, as shown in FIG. Figure 1 As shown in ; further, in the preferred embodiment, the length of the glass fiber layer 201 is less than the length of the integral rubber ring 1, and both ends thereof correspond to the setting of the port stop 203 and are reserved with a certain width.

[0049] Further, the bamboo strips layer 202 in the preferred embodiment can be used as a structural layer to provide strength for the bundle node structure. It is preferably obtained by winding and bonding the bamboo strips material on the outer peripheral wall surface of the glass fiber layer 201, and the two ends are flush with the two ends of the glass fiber layer 201. At the same time, the bamboo strips layer 202 in the preferred embodiment is preferably formed by alternately winding and bonding the circumferential bamboo strips and the axial bamboo strips, and the total winding thickness of the circumferential bamboo strips is greater than the total winding thickness of the axial bamboo strips, and the outermost and innermost sides of the bamboo strips layer 202 are preferably wound by circumferential bamboo strips. Further, the winding thickness of the bamboo strips layer 202 is preferably greater than half of the thickness of the reinforcing layer 2. In the preferred embodiment, the thickness of the reinforcing layer 2 is the distance from the bottom of the connecting groove 104 in the radial direction to the outermost side of the bamboo strips layer 202.

[0050] Furthermore, in the preferred embodiment, a port stopper 203 is wound and bonded on the outer peripheral wall surface of the integral rubber ring 1 at both ends of the bamboo strip layer 202, which is preferably formed by winding and bonding a single annular bamboo strip piece or a plurality of annular bamboo strip pieces, and one side of the port stopper 203 abuts the end faces of the glass fiber layer 201 and the bamboo strip layer 202 with its end face, and the other side is flush with the end face of the integral rubber ring 1 (at this time, there is no "flange 105" setting) or abuts the inner peripheral wall surface of the flange 105; at the same time, the outer peripheral wall surface of the port stopper 203 is preferably flush with the outer peripheral wall surface of the bamboo strip layer 202, and when the integral rubber ring 1 is provided with a flange 105, the outer peripheral wall surface of the port stopper 203 abuts the inner peripheral wall surface of the flange 105. Preferably, the axial extension length of the flange 105 is greater than the axial length of the port stop 203, so that the flange 105 can completely cover the port stop 203 and the end periphery of the bamboo strip layer 202, thereby obtaining Figure 1 The bundle node structure shown in .

[0051] Further preferably, after the port baffle 203 and the bamboo strip layer 202 are formed, an outer protective layer is provided on the outer peripheral wall surface of the reinforcing layer 2, that is, an outer protective layer is provided on the outer peripheral wall surface of the port baffle 203 and the bamboo strip layer 202, and the outer protective layer is obtained by applying a protective coating on the outer peripheral wall surface of the port baffle 203 and the bamboo strip layer 202, or by first winding and bonding a bamboo fiber material on the outer peripheral wall surface of the reinforcing layer 2 and then applying a protective material.

[0052] Through the above settings, the matching between the obtained bundle structure and the two pipes 3 is also as shown in Figure 2As shown in the figure, the socket end of the first pipe 3a is correspondingly inserted into one end of the bundle section, and the end thereof abuts against one side of the stopper 103, and the socket end of the second pipe 3b is correspondingly inserted into the other end of the bundle section, and the end of the second pipe 3b abuts against the other side of the stopper 103; further, grooves are provided on the outer circumference of the two socket ends corresponding to the first spurs 101 and the second spurs 102 along the circumferential direction, namely the first sealing groove 301 and the second sealing groove 302. Specifically, when the bundle section structure matches the two pipes 3, the first spurs 101 at both ends of the bundle section structure can be correspondingly embedded in the first sealing groove 301 with their ends, and the second spurs 102 arranged on both sides of the stopper 103 can be correspondingly embedded in the second sealing groove 302 near the end of the corresponding pipe 3. The arrangement of the first spurs 101 and the second spurs 102 can effectively achieve the sealing of the two pipes 3 after docking, and prevent leakage after the pipes are connected, and the arrangement of the reinforcing layer 2 can fully ensure the strength and stability of the pipe docking position.

[0053] Furthermore, the beam segment structure in the preferred embodiment is preferably prepared in the following manner, which includes the following steps:

[0054] (1) The integral rubber ring 1 is molded. In the preferred embodiment, the integral rubber ring 1 is prepared by injection molding, and the integral rubber ring 1 having the spurs, the stopper 103, the connecting groove 104 and the flange 105 is obtained for use;

[0055] (2) Wrapping and bonding the port stopper 203

[0056] The integral rubber ring 1 is correspondingly mounted on a special mold, and a port stopper 203 of a certain thickness and a certain length is correspondingly wound and bonded on the outer peripheral wall surfaces at both ends thereof; specifically, the port stopper 203 preferably does not extend to the position where the connecting groove 104 is provided, and the port stopper 203 is wound and bonded in a circumferential direction on the outer periphery of the end of the integral rubber ring 1 with a bamboo strip curtain or a single bamboo strip;

[0057] When the end of the integral rubber ring 1 is not provided with a flange 105, the two-end stoppers 203 are wrapped and flush with the two side end planes of the integral rubber ring 1, and extend radially outward by a certain thickness;

[0058] When a flange 105 is provided at the end of the integral rubber ring 1, two port stops 203 are wrapped and arranged in the concave cavity formed by the flange 105, one side of the port stop 203 abuts against the inner wall of the flange 105, and the setting thickness of the port stop 203 is equal to or slightly smaller than the radial width of the concave cavity of the integral rubber ring 1, so that the outer peripheral wall of the port stop 203 abuts against the inner wall of the flange 105 facing the outer peripheral wall of the integral rubber ring 1, and the axial setting length of the port stop 203 is less than the axial extension length of the flange 105, that is, one side wall of the port stop 203 abuts against the inner peripheral wall of the flange 105, and the other side wall does not protrude from the end of the flange 105.

[0059] (3) Winding and bonding of glass fiber layer 201

[0060] After the two end stoppers 203 are arranged, a glass fiber material is wound and bonded to a certain thickness on the outer peripheral wall of the integral rubber ring 1 between the two end stoppers 203 to form a glass fiber layer 201 .

[0061] When winding and bonding the glass fiber layer 201, firstly, the glass fiber material is wound and bonded in each connecting groove 104 so that each connecting groove 104 is filled with the glass fiber material. When the glass fiber material in each connecting groove 104 is filled to be flush with the outer peripheral wall of the integral rubber ring 1, a glass fiber material of a certain thickness is wound and bonded on the entire outer peripheral wall of the main body between the two end stops 203. When the glass fiber material is wound, resin is also poured on it to use it as an adhesive to achieve bonding of the materials, thereby forming a stable glass fiber layer 201.

[0062] (4) Winding and bonding of bamboo strips layer 202

[0063] A bamboo strip layer 202 of a certain thickness is wound and bonded on the outer peripheral wall surface of the glass fiber layer 201 after winding and bonding. The thickness of the bamboo strip layer 202 is preferably not less than half of the overall thickness of the bundle node structure. The overall thickness of the bundle node structure is preferably the sum of the thickness of the bamboo strip layer 202, the thickness of the glass fiber layer 201 and the thickness of the integral rubber ring 1 body.

[0064] Furthermore, the bamboo strips layer 202 in the preferred embodiment is obtained by winding multiple layers of axial bamboo strips and circumferential bamboo strips respectively. When the bamboo strips layer 202 is wound and formed, the resin and other adhesives are continuously added to enable the bamboo strips layer 202 to form a stable whole with the glass fiber layer 201 and the port stop 203. The inner wall surface of the bamboo strips layer 202 is tightly bonded to the outer wall surface of the glass fiber layer 201, and the two side walls of the bamboo strips layer 202 are tightly bonded to the side walls of the two port stops 203, and then the glass fiber layer 201, the bamboo strips layer 202 and the port stop 203 form a reinforcement layer 2 of the bundle structure, which provides support and structural strength for the integral rubber ring 1.

[0065] When the flanges 105 are not provided at both ends of the integral rubber ring 1 , the two ends of the bamboo strip layer 202 along the axial direction abut against the end surfaces of the two-end stoppers 203 , and the outer peripheral wall surface of the bamboo strip layer 202 is flush with the outer peripheral wall surface of the two-end stoppers 203 .

[0066] When flanges 105 are provided at both ends of the integral rubber ring 1, both ends of the bamboo strip layer 202 extend into the flanges 105 and abut against the inner peripheral wall of the flanges 105; preferably, after the outer peripheral wall surfaces at both ends of the middle portion of the bamboo strip layer 202 abut against the inner peripheral wall of the flanges 105, the middle portion of the bamboo strip layer 202 continues to wrap outwardly between the ends of the two flanges 105 and adhere to a certain thickness, such as Figure 1As shown in , the end surface of the bamboo strip layer 202 is made to be in a "convex" shape, so that the connection between the structural layer 2 and the flange 105 is stable.

[0067] (5) After the port stop 203, the bamboo strip layer 202 and the glass fiber layer 201 are solidified and formed, the reinforcing layer 2 is obtained, and then the peripheral treatment of the bundle structure is carried out, and the bundle structure that meets the requirements is obtained after demolding. The so-called peripheral treatment can be to apply protective coating on the peripheral wall surface of the port stop 203 and the bamboo strip layer 202, or to wrap and bond the bamboo fiber layer and then apply protective material.

[0068] Through the preparation of the above steps, a bundle joint structure containing an integral rubber ring can be obtained. The preparation method of the above process is simple, and the obtained bundle joint structure has good integrity, can accurately realize the connection and docking of two pipes, and ensure the sealing and accuracy of the docking of bamboo composite pipes; in addition, the integral production of the rubber ring can effectively avoid the setting of the bundle joint lining layer, while ensuring the structural strength and rigidity of the bundle joint structure, simplifying the preparation process of the bundle joint, reducing the difficulty of preparing the bundle joint, improving the convenience and reliability of the use of bamboo composite pipes, reducing the application cost of bamboo composite pipes, and promoting the application and promotion of bamboo composite pipes. It has good application prospects and promotion value.

[0069] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A beam node structure, characterized in that: It includes an integral rubber ring and a reinforcement layer which are sequentially arranged from the inside to the outside in the radial direction; The integral rubber ring comprises a body in a tubular structure, an inner wall surface of the body is provided with an internal stopper in the circumferential direction, and the internal stopper is provided with at least one spur on both sides along the axial direction of the bundle segment structure; The spur is an annular structure arranged along the inner circumference of the body, the outermost side of which is closely connected to the inner circumferential wall of the body, and the distance between each position on the annular structure and the plane where the internal stop is located decreases as the inner diameter of the spur decreases, that is, the inner side of the spur points to the side of the internal stop; a connecting groove is opened on the outer circumferential wall of the body along the annular direction, and the connecting groove is one or a plurality of connecting grooves spaced apart in the axial direction; The reinforcing layer is wound and bonded on the outer peripheral wall of the body, and includes port baffles arranged on the outer peripheral walls of both ends of the body, a glass fiber layer arranged between the two port baffles, and a bamboo strip layer arranged on the outer peripheral wall of the glass fiber layer; the glass fiber layer has a radial thickness less than that of the port baffle, and is formed by winding and bonding the glass fiber material on the outer peripheral wall of the body, and each of the connecting grooves is filled with the wound and bonded glass fiber material; the bamboo strip layer is wound and bonded on the outer peripheral wall of the glass fiber layer, and its two end surfaces along the axial direction are respectively in close contact with the side wall of the corresponding port baffle; Wherein, flanges are respectively arranged at both ends of the body; and the two flanges are obtained by respectively extending the two ends of the body radially outward for a certain length and then extending axially towards each other for a certain length; The port stop abuts against the inner circumferential wall of the flange with its side wall, and the two ends of the bamboo strip layer extend into the annular groove formed by the flange respectively, and the outer circumferential wall of the end abuts against the inner circumferential wall of the flange.

2. The beam segment structure according to claim 1, wherein: The thickness of the bamboo strips layer is not less than half of the thickness of the reinforcement layer.

3. The beam segment structure according to claim 1, wherein: The bamboo strips layer is formed by alternately winding and bonding circumferential bamboo strips and axial bamboo strips in the radial direction, and the total winding thickness of the circumferential bamboo strips is greater than the total winding thickness of the axial bamboo strips.

4. The beam segment structure according to any one of claims 1 to 3, wherein: The port baffle is formed by winding and bonding a single annular bamboo strip piece or a plurality of annular bamboo strip pieces.

5. The beam segment structure according to any one of claims 1 to 3, wherein: The opening width of the connecting groove is smaller than the maximum width of the connecting groove along the axial direction.

6. The beam segment structure according to claim 5, wherein: The cross section of the connecting groove is trapezoidal, and the width of its opening is equal to the length of the shorter side of the two parallel sides of the trapezoid.

7. The beam segment structure according to any one of claims 1 or 2 or 3 or 6, wherein: An outer protective layer is arranged on the outer peripheral wall surface of the reinforcing layer, and the outer protective layer is obtained by applying protective coating on the outer peripheral wall surfaces of the port baffle and the bamboo strip layer, or by winding and bonding bamboo fiber material on the outer peripheral wall surface of the reinforcing layer and then applying protective material.

8. A method for preparing a bundle-node structure, which can be used for preparing the bundle-node structure according to any one of claims 1 to 7, and the steps are as follows: (1) An integral rubber ring having an internal stop, spurs and connecting grooves is formed for use; (2) The integral rubber ring is mounted on a special mold, and the end stoppers are respectively wound around the outer peripheral wall surfaces at both ends of the integral rubber ring; (3) Winding and bonding glass fiber materials in each connection groove respectively, and after each connection groove is filled with glass fiber materials, winding and bonding a certain thickness of glass fiber materials on the outer peripheral wall surface of the body between the two port baffles to form a glass fiber layer; (4) Winding and bonding a plurality of layers of bamboo strips material on the outer peripheral wall surface of the glass fiber layer to form a bamboo strip layer whose two end surfaces respectively abut against the side wall surface of the port baffle; (5) After the port stopper, the bamboo strip layer and the glass fiber layer are solidified and formed, a reinforcement layer is obtained which forms a whole with the integral rubber ring, and then demolding is performed to obtain a bundle node structure.

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