A bundle structure suitable for bamboo composite pipe and preparation method thereof

Abstract

The present invention discloses a bundle joint structure suitable for bamboo composite pipes and a preparation method thereof, belonging to the technical field of bamboo composite pipe connection. Through the corresponding setting of the integral rubber ring, the setting of the inner lining layer in the bundle joint structure can be effectively avoided, the preparation process of the bundle joint structure can be simplified, and the leakage problem caused by the damage of the inner lining layer in the traditional bundle joint structure can be avoided; at the same time, through the corresponding setting of the connection groove on the outer peripheral wall surface of the integral rubber ring, the stable connection between the reinforcement layer and the integral rubber ring can be effectively realized, and the separation of the reinforcement layer and the integral rubber ring due to the axial force or radial force can be avoided, thereby ensuring the stability and reliability of the reinforcement layer setting. The bundle joint structure of the present invention has a simple structure and a convenient preparation method, can effectively simplify the preparation process of the bundle joint structure, improve the preparation efficiency, reduce the preparation cost, ensure the strength and sealing of the bamboo composite pipe connection structure, extend the service life of the bamboo composite pipe connection structure, and reduce the application cost and maintenance cost of the bamboo composite pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of bamboo composite pipe connection, and particularly relates to a bundle joint structure suitable for bamboo composite pipes 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 defects or improvement needs in the prior art, the present invention provides a bundle joint structure suitable for bamboo composite pipes 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 bundle joint structure suitable for bamboo composite pipes, characterized in that it includes an integral rubber ring and a reinforcing layer sleeved on the outer circumference of the integral rubber ring;

[0007] The integral rubber ring comprises a body with a tubular structure; a stopper is provided on the inner peripheral wall surface of the middle part of the body in the circumferential direction, and at least one convex ring is provided on both axial sides of the stopper; the convex ring is provided on the inner peripheral wall surface of the body, and its radial thickness is smaller than the radial thickness of the stopper; and at least one connecting groove is provided on the outer peripheral wall surface of the body;

[0008] The reinforcing layer is formed in a winding and bonding manner, and its inner peripheral wall surface abuts against the outer peripheral wall surface of the main body. The inner peripheral wall surface of the reinforcing layer is provided with protrusions corresponding to each of the connecting grooves, and each of the connecting grooves is filled with the protrusions.

[0009] As a further improvement of the present invention, the reinforcement layer is formed by winding and bonding glass fiber material.

[0010] As a further improvement of the present invention, the reinforcement layer includes a glass fiber layer, a transition layer and a bamboo strip layer;

[0011] The glass fiber layer is formed by winding and bonding glass fiber material in the connecting groove, and the outer peripheral wall surface of the glass fiber layer protrudes from the outer peripheral wall surface of the main body, and forms a boss structure on the outer periphery of the main body; the transition layer is arranged on the outer peripheral wall surface of the main body on both sides of the boss structure, and is formed by winding and bonding one or more of straw, stalks, hemp fiber, and bamboo fiber, and the outer peripheral wall surface of the transition layer is flush with the outer peripheral wall surface of the glass fiber layer; the bamboo strips layer is obtained by winding and bonding bamboo strips material to the periphery of the transition layer and the glass fiber layer.

[0012] 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 radial direction.

[0013] As a further improvement of the present invention, the innermost and outermost sides of the bamboo strips layer are respectively formed by winding and bonding circumferential bamboo strips, and the total winding thickness of the circumferential bamboo strips is not less than the total winding thickness of the axial bamboo strips.

[0014] As a further improvement of the present invention, flanges are respectively provided at both ends of the main body; the two flanges are obtained by extending the two ends of the main body radially outward for a certain length and then extending axially towards each other for a certain length, and the two ends of the reinforcing layer respectively extend into the annular grooves formed by the two flanges, and the end face and the outer peripheral wall surface of the end portion of the reinforcing layer abut against the inner wall surface 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, a rounded corner is provided on the inner side of the end of the convex ring away from the baffle.

[0018] Another aspect of the present invention provides a method for preparing a bundle segment structure, which is used for preparing a bundle segment structure in which a reinforcement layer is formed by winding and bonding glass fiber materials only, and the steps are as follows:

[0019] (1) Forming an integral rubber ring with a stopper, a convex ring and a connecting groove for use;

[0020] (2) placing the integral rubber ring on a special mold, winding and bonding the glass fiber material in each of the connecting grooves, and after the glass fiber material fills each of the connecting grooves, continuing to wind and bond a certain thickness of the glass fiber material radially outward on the outer peripheral wall surface of the body to form a reinforcement layer on the outer periphery of the integral rubber ring;

[0021] (3) After the reinforcement layer is solidified and formed, demoulding is performed to obtain a bundle structure suitable for the bamboo composite pipe.

[0022] Another aspect of the present invention provides a method for preparing a bundle node structure, which is used for preparing a bundle node structure in which a reinforcing layer is formed by correspondingly winding and bonding a glass fiber layer, a transition layer and a bamboo strip layer, and the steps are as follows:

[0023] (1) Forming an integral rubber ring with a stopper, a convex ring and a connecting groove for use;

[0024] (2) The integral rubber ring is mounted on a special mold, and a glass fiber material is wound and bonded in each of the connection grooves to form a glass fiber layer in the reinforcement layer. After the glass fiber material fills each of the connection grooves, it is continuously wound and bonded radially outward to a certain thickness to form a boss structure on the outer periphery of the body;

[0025] (3) One or more of straw, stalks, hemp fiber, and bamboo fiber are wound and bonded to the outer peripheral wall surface of the body on both sides of the axial direction of the boss structure to be flush with the outer peripheral wall surface of the boss structure to form a transition layer in the reinforcement layer;

[0026] (4) wrapping and bonding a bamboo strip material to a certain thickness around the outer periphery of the reinforcing layer and the transition layer to form a bamboo strip layer in the reinforcing layer;

[0027] (5) After the glass fiber layer, the transition layer and the bamboo strip 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 structure suitable for the bamboo composite pipe.

[0028] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0029] In general, the above technical solution conceived by the present invention has the following beneficial effects compared with the prior art:

[0030] (1) The bundle joint structure of the present invention is applicable to the bamboo composite pipe. By correspondingly setting the integral rubber ring, the setting of the inner lining layer in the bundle joint structure is effectively avoided, the preparation process of the bundle joint structure is simplified, the leakage problem caused by the damage of the inner lining layer in the traditional bundle joint structure is avoided, and the stability and reliability of the bamboo composite pipe connection structure are improved; at the same time, by correspondingly setting the connection groove on the outer peripheral wall surface of the integral rubber ring, the stable connection between the reinforcing layer and the integral rubber ring can be effectively achieved, and the separation of the reinforcing layer and the integral rubber ring due to axial force or radial force can be avoided, thereby 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;

[0031] (2) The bundle-node structure of the present invention is applicable to the bamboo composite tube. It uses the glass fiber material to form a reinforcing layer on the outer periphery of the integral rubber ring by winding and bonding. This makes the molding method of the reinforcing layer simple, greatly improves the molding efficiency of the bundle-node structure, and indirectly reduces the molding cost of the bundle-node structure.

[0032] (3) The bundle joint structure suitable for bamboo composite pipes of the present invention effectively ensures the reliability of the setting of the reinforcement layer by setting the reinforcement layer on the outer periphery of the integral rubber ring as a combination of a glass fiber layer, a transition layer and a bamboo strip layer, and utilizes the convex design of the glass fiber layer and the setting of the transition layer, thereby reducing the usage of bamboo strip materials and glass fiber materials, further reducing the cost of raw materials in the preparation process of the bundle joint structure, thereby reducing the application cost of the bundle joint structure, enriching the preparation process of the bundle joint structure, and promoting the application of bamboo composite pipes;

[0033] (4) The bundle joint structure applicable to the bamboo composite pipe of the present invention further enhances the stability of the port stop by respectively setting flanges at both ends of the integral rubber ring and covering one end of the port stop in the annular groove formed by the flanges, thereby fully avoiding the separation of the integral rubber ring and the reinforcement layer, and at the same time ensuring the integrity, sealing and strength of the bundle joint structure, thereby extending the service life of the bundle joint structure;

[0034] (5) The bundle joint structure applicable to the bamboo composite tube 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.

[0035] (6) The bundle-node structure suitable for bamboo composite pipes of the present invention has a simple structure and a convenient preparation method, which can effectively simplify the preparation process of the bundle-node structure, improve the preparation efficiency of the bundle-node structure, and reduce the preparation cost of the bundle-node structure. The prepared bundle-node structure has high strength and good sealing performance, which can effectively ensure the strength and sealing performance of the bamboo composite pipe connection structure, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a structural cross-sectional view of a bundle structure applicable to a bamboo composite tube in Example 1 of the present invention;

[0037] Figure 2 is a structural cross-sectional view of the beam segment structure in Example 1 of the present invention when in operation;

[0038] Figure 3 is a structural cross-sectional view of a bundle structure applicable to a bamboo composite tube in Example 2 of the present invention;

[0039] Figure 4 is a structural cross-sectional view of the beam segment structure in Example 2 of the present invention when in operation;

[0040] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Integral rubber ring, 101. First convex ring, 102. Second convex ring, 103. Baffle, 104. Connecting groove, 105. Flanged edge; 2. Reinforcement layer, 201. Glass fiber layer, 202. Transition layer, 203. Bamboo strip layer; 3. Pipe, 3a. First pipe, 3b. Second pipe, 301. First sealing groove, 302. Second sealing groove. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Embodiment 1:

[0047] See also Figure 1 , 2The beam segment structure in the preferred embodiment 1 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 and has good heat resistance and certain elastic deformation properties, and each part of the body has a certain thickness in the radial direction to ensure the stability of its structure.

[0048] Furthermore, a baffle 103 of a certain thickness is arranged along the annular direction on the inner side of the middle part of the main body, which is used to abut the ends of the sockets of the two bamboo composite pipes to be connected to achieve the limiting of the sockets; at the same time, at least one convex ring structure is arranged on both sides of the baffle 103, and the convex ring is fixedly arranged on the inner circumferential wall surface of the main body, and it is preferably integrally formed with the main body.

[0049] Furthermore, in a preferred embodiment, at least two convex rings are arranged at intervals on both sides of the stopper 103 along the axial direction. More specifically, there are two convex rings on both sides of the stopper 103, namely, a first convex ring 101 and a second convex ring 102. Figure 1 Obviously, the number of the convex rings 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.

[0050] Furthermore, a plurality of connection grooves 104 are provided at intervals along the axial direction on the outer peripheral wall surface of the body, and each connection groove 104 is provided along the circumferential direction for stably connecting the outer peripheral wall surface of the body with the reinforcement layer 2 .

[0051] Through the above arrangement, an integral rubber ring 1 having a convex ring and a stopper can be obtained, and its length is not less than the sum of the lengths of the socket ends of the two bamboo composite tubes, and its 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 convex ring (101, 102) and the stopper 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 convex ring and the stopper are simple to set, with high stability, and the opening of the connection groove is completed in the molding process of the rubber ring or opened after molding, which is easy to achieve using existing technology, greatly simplifying the preparation process of the bundle section.

[0052] 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.

[0053] Further preferably, in order to prevent the integral rubber ring 1 and the reinforcing layer 2 from separating due to radial force, the opening width of the connecting groove 104 in the preferred embodiment 1 is smaller than the maximum width of the connecting groove 104 along the axial direction, and further preferably, the opening width is the minimum width of the connecting groove 104 after it is opened.

[0054] Specifically, the connecting groove 104 in the preferred embodiment 1 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 short side of the two parallel sides of the trapezoid. 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.

[0055] 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.

[0056] More specifically, the reinforcing layer 1 in the preferred embodiment 1 is as follows Figure 1 As shown in FIG. 1 , the glass fiber layer 201 is formed by winding and bonding glass fiber materials. The glass fiber layer 201 extends outward from the outer peripheral wall surface of the integral rubber ring 1 to a certain thickness, and its inner peripheral wall surface is closely attached to the outer peripheral wall surface of the integral rubber ring 1, and is embedded in and fills each connection groove 104, as shown in FIG. Figure 1As shown in . Meanwhile, when flanges 105 are not provided at both ends of the integral rubber ring 1, the two ends of the glass fiber layer 201 are preferably flush with the ends of the integral rubber ring 1, and the inner peripheral wall surface of the glass fiber layer 201 is stably connected to the outer peripheral wall surface of the integral rubber ring 1 by an adhesive. Correspondingly, when flanges 105 are provided at both ends of the integral rubber ring 1, the two ends of the glass fiber layer 201 extend into the annular groove formed by the flanges 105, and the end surface of the glass fiber layer 201 and the outer peripheral wall surface of the end abut against the inner peripheral wall surface of the flange 105, that is, the two flanges 105 cover the two ends of the glass fiber layer 201.

[0057] Through the above settings, the matching between the obtained bundle structure and the two pipes 3 is as follows: Figure 2 As shown in , the socket end of the first pipe 3a is correspondingly inserted into one end of the bundle segment, 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 segment, 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 convex ring 101 and the second convex ring 102 along the circumferential direction, namely the first sealing groove 301 and the second sealing groove 302. Specifically, when the bundle segment structure matches the two pipes 3, the first convex rings 101 at both ends of the bundle segment structure can be correspondingly embedded in the first sealing groove 301 with their ends, and the second convex rings 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 convex ring 101 and the second convex ring 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.

[0058] Furthermore, the bundle segment structure in the preferred embodiment 1 is preferably prepared in the following manner, which includes the following steps:

[0059] (1) The integral rubber ring 1 is molded. In the preferred embodiment 1, the integral rubber ring 1 is prepared by injection molding, and the integral rubber ring 1 having a convex ring, a stopper 103, and a connecting groove 104 is obtained for standby use; whether the flange 105 needs to be prepared is preferably selected according to actual needs;

[0060] (2) Winding and bonding of the glass fiber layer 201

[0061] The integral rubber ring 1 is correspondingly mounted on a special mold, and a glass fiber layer 201 of a certain thickness and a certain length is wound and bonded on the outer peripheral wall surface of the integral rubber ring 1 .

[0062] Specifically, before wrapping and bonding the glass fiber layer 201 protruding from the outer peripheral wall of the integral rubber ring 1, first wrap and bond the glass fiber material in each connecting groove 104 so that each connecting groove 104 is filled with the glass fiber material; after the glass fiber material in each connecting groove 104 is flush with the outer peripheral wall of the integral rubber ring 1, continue to wrap and bond a certain thickness of glass fiber material on the outer periphery of the integral rubber ring 1 to form a reinforcement layer 2.

[0063] When flanges 105 are not provided at both ends of the integral rubber ring 1, the two ends of the reinforcing layer 2 are respectively flush with the two ends of the integral rubber ring 1, and before the glass fiber material is wound around the outer peripheral wall of the body, an adhesive is preferably applied on the outer peripheral wall of the integral rubber ring 1.

[0064] When flanges 105 are provided at both ends of the integral rubber ring 1, when the reinforcing layer 2 is wound and bonded, the two ends of the reinforcing layer 2 are respectively abutted against the inner wall surface of the flange 105, and the outer peripheral wall surface of the end of the reinforcing layer 2 abuts against the inner wall surface of the end of the flange 105 extending in the axial direction. Of course, when the reinforcing layer 2 is wound and bonded, the adhesive can also be applied to the outer peripheral wall surface of the integral rubber ring 1 first, and the portion between the two ends of the flange 105 can continue to be wound radially outward to a certain thickness, that is, a boss structure is formed on the outer periphery of the reinforcing layer 2.

[0065] (3) After the glass fiber layer 201 is 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 by demolding. The so-called peripheral treatment can be to apply protective coating on the peripheral wall surface of the reinforcing layer 2, or to wrap and bond the bamboo fiber layer and then apply protective material.

[0066] 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.

[0067] Embodiment 2:

[0068] See also Figure 3 , 4 The beam section structure in the preferred embodiment 2 also includes an integral rubber ring 1 and a reinforcing layer 2. The integral rubber ring in the embodiment 2 is substantially the same as the integral rubber ring in the embodiment 1, so the main structure is not described in detail. However, in order to facilitate the docking of the bamboo composite tube 3, a rounded corner is provided on the inner side of the end of the convex ring away from the stop 103 in the preferred embodiment 2, such as Figure 3 , 4 As shown in , the above-mentioned rounded corners can also be correspondingly opened in the integral rubber ring in Example 1, which will not be described in detail here.

[0069] Furthermore, the biggest difference between Example 2 and Example 1 is that the reinforcing layer 2 in the preferred embodiment 2 includes a glass fiber layer 201, a transition layer 202 and a bamboo strip layer 203. Figure 3 as shown in .

[0070] Specifically, the glass fiber layer 201 in the preferred embodiment 2 is correspondingly arranged in each connecting groove 104, which is formed by corresponding winding and bonding of glass fiber materials, and after filling each connecting groove 104, it continues to be wound radially outward to a certain thickness to form an annular boss structure on the outer peripheral wall surface of the main body. After the glass fiber layer 201 is formed in all the connecting grooves 104 in the above-mentioned form, a plurality of convex ring structures formed by corresponding winding and bonding of glass fiber materials are formed on the outer peripheral wall surface of the main body, and the plurality of glass fiber convex rings are arranged at intervals in the axial direction; further, a transition layer 202 of a certain thickness is correspondingly wound and bonded on the outer peripheral wall surface of the main body on both sides of the above-mentioned convex ring structure. The transition layer 202 in the preferred embodiment is formed by winding and bonding one or more of straw, stalks, hemp fiber, and bamboo fiber until the outer peripheral wall surface of the transition layer 202 is flush with the outer peripheral wall surface of the glass fiber layer 201.

[0071] Furthermore, bamboo strips material of a certain thickness is correspondingly wound and bonded on the outer peripheral wall surfaces of the glass fiber layer 201 and the transition layer 202 to form a bamboo strip layer 203 in the reinforcement layer 2. The bamboo strip layer 203 is preferably wound alternately in the form of "circumferential bamboo strips + axial bamboo strips + circumferential bamboo strips", and it is further preferred that the innermost and outermost sides of the bamboo strip layer 203 are respectively annular bamboo strips.

[0072] When flanges 105 are not provided at both ends of the main body, the two ends of the bamboo strip layer 203 are preferably flush with the two ends of the main body; when flanges 105 are provided at both ends of the main body, the two ends of the bamboo strip layer 105 respectively extend into the annular grooves formed by the flanges 105, and the end faces and the outer peripheral wall surfaces of the end portions abut against the inner wall surfaces of the flanges 105.

[0073] Accordingly, the preparation method of the bundle segment structure in the preferred embodiment 2 preferably comprises the following steps:

[0074] (1) The integral rubber ring 1 is molded. In the preferred embodiment 1, the integral rubber ring 1 is prepared by injection molding, and the integral rubber ring 1 having a convex ring, a stopper 103, and a connecting groove 104 is obtained for standby use; whether the flange 105 needs to be prepared is preferably selected according to actual needs;

[0075] (2) Winding and bonding of the glass fiber layer 201

[0076] The integral rubber ring 1 is correspondingly mounted on a special mold, and the glass fiber layer 201 is respectively wound and bonded in each connection groove 104. Specifically, the glass fiber material is wound and bonded in the connection groove 104, so that the connection groove 104 is filled with the glass fiber material. When the glass fiber material is wound and bonded to be flush with the outer peripheral wall surface of the body, it is continuously wound and bonded radially outward to a certain thickness, forming multiple "convex ring" structures on the outer peripheral wall surface of the body. Preferably, the width of the convex ring structure of the glass fiber layer 201 protruding from the outer peripheral wall surface of the body is equal to the slot width of the connection groove 104.

[0077] (3) Winding, bonding or filling of transition layer 202

[0078] On both sides of the protruding peripheral wall of each glass fiber layer 201 , one or more of straw, stalk, hemp fiber, and bamboo fiber are respectively wound and bonded to form a transition layer 202 until the peripheral wall of the transition layer 202 is flush with the peripheral wall of each glass fiber layer 201 .

[0079] (4) Winding and bonding of bamboo strips layer 203

[0080] On the outer peripheral wall of the transition layer 202 and the glass fiber layer 201, bamboo strips are wound and bonded to a certain thickness to form a bamboo strip layer 203, which provides support for the integral rubber ring 1 to ensure that the bundle structure has a certain strength, rigidity and is shaped. Preferably, the bamboo strip layer 203 is wound in the order of "circumferential bamboo strips + axial bamboo strips + circumferential bamboo strips", and preferably the innermost and outermost sides of the bamboo strip layer 203 are respectively set as circumferential bamboo strips, and the total winding thickness of the circumferential bamboo strips is not less than the total winding thickness of the axial bamboo strips.

[0081] When flanges 105 are not provided at both ends of the integral rubber ring 1, the two ends of the bamboo strip layer 203 are respectively flush with the two ends of the integral rubber ring 1; when flanges 105 are provided at both ends of the integral rubber ring 1, when the bamboo strip layer 203 is wrapped and bonded, the two ends of the reinforcing layer 2 are respectively abutted against the inner wall surface of the flange 105, and the outer peripheral wall surface of the end of the bamboo strip layer 203 abuts against the inner wall surface of the end extending axially from the flange 105.

[0082] (5) After the glass fiber layer 201, the transition layer 202 and the bamboo strip layer 203 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 by demolding. The so-called peripheral treatment can be to apply a protective coating on the peripheral wall surface of the reinforcing layer 2, or to wrap and bond the bamboo fiber layer and then apply a protective material.

[0083] After the preparation steps mentioned above, 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 and can accurately realize the connection and docking of the two pipes, thereby ensuring the sealing and accuracy of the docking of the bamboo composite pipe. At the same time, the corresponding setting of the transition layer can effectively reduce the use of glass fiber materials and reduce the preparation cost of the bundle joint materials, but correspondingly, the formed bundle joint structure is often used in occasions with lower pressure. 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.

[0084] 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 bundle structure suitable for bamboo composite pipes, characterized in that: It comprises an integral rubber ring and a reinforcing layer sleeved on the outer periphery of the integral rubber ring; The integral rubber ring comprises a body with a tubular structure; a stopper is provided on the inner peripheral wall surface of the middle part of the body in the circumferential direction, and at least one convex ring is provided on both axial sides of the stopper; the convex ring is provided on the inner peripheral wall surface of the body, and its radial thickness is smaller than the radial thickness of the stopper; and at least one connecting groove is provided on the outer peripheral wall surface of the body; The reinforcing layer is formed in a winding and bonding manner, and its inner peripheral wall surface abuts against the outer peripheral wall surface of the body, and the inner peripheral wall surface of the reinforcing layer is provided with protrusions corresponding to each of the connecting grooves, so that each of the connecting grooves is filled with the protrusions; The reinforcing layer includes a glass fiber layer, a transition layer and a bamboo strip layer; the glass fiber layer is formed by winding and bonding a glass fiber material in the connecting groove, and the outer peripheral wall surface of the glass fiber layer protrudes from the outer peripheral wall surface of the main body, and forms a boss structure on the outer periphery of the main body; the transition layer is arranged on the outer peripheral wall surface of the main body on both sides of the boss structure, and is formed by winding and bonding one or more of rice straw, stalks, hemp fiber, and bamboo fiber, and the outer peripheral wall surface of the transition layer is flush with the outer peripheral wall surface of the glass fiber layer; the bamboo strip layer is obtained by winding and bonding a bamboo strip material to the periphery of the transition layer and the glass fiber layer.

2. The bundle joint structure applicable to bamboo composite pipe according to claim 1, wherein: The bamboo strips layer is formed by alternately winding and bonding circumferential bamboo strips and axial bamboo strips in radial direction.

3. The bundle joint structure applicable to bamboo composite pipe according to claim 1, wherein: The innermost and outermost sides of the bamboo strip layer are respectively formed by winding and bonding the circumferential bamboo strips, and the total winding thickness of the circumferential bamboo strips is not less than the total winding thickness of the axial bamboo strips.

4. The bundle joint structure applicable to bamboo composite pipe according to any one of claims 1 to 3, wherein: The two ends of the main body are respectively provided with flanges; the two flanges are obtained by extending the two ends of the main body radially outward for a certain length and then extending axially towards each other for a certain length, and the two ends of the reinforcing layer respectively extend into the annular grooves formed by the two flanges, and the end face and the outer peripheral wall surface of the end portion of the reinforcing layer abut against the inner wall surface of the flange.

5. The bundle joint structure applicable to bamboo composite pipe according to any one of claim 4, wherein: The opening width of the connecting groove is smaller than the maximum width of the connecting groove along the axial direction.

6. The bundle joint structure applicable to bamboo composite pipe according to any one of claim 5, wherein: The inner side of the convex ring away from the stop platform is provided with a rounded corner.

7. A method for preparing a bundle joint structure, used for the bundle joint structure suitable for bamboo composite pipes as claimed in any one of claims 2 to 4, comprising the following steps: (1) Forming an integral rubber ring with a stopper, a convex ring and a connecting groove for use; (2) The integral rubber ring is mounted on a special mold, and a glass fiber material is wound and bonded in each of the connection grooves to form a glass fiber layer in the reinforcement layer. After the glass fiber material fills each of the connection grooves, it is continuously wound and bonded radially outward to a certain thickness to form a boss structure on the outer periphery of the body; (3) One or more of straw, stalks, hemp fiber, and bamboo fiber are wound and bonded to the outer peripheral wall surface of the body on both sides of the axial direction of the boss structure to be flush with the outer peripheral wall surface of the boss structure to form a transition layer in the reinforcement layer; (4) wrapping and bonding a bamboo strip material to a certain thickness around the outer periphery of the reinforcing layer and the transition layer to form a bamboo strip layer in the reinforcing layer; (5) After the glass fiber layer, the transition layer and the bamboo strip 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 structure suitable for the bamboo composite pipe.

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