Anti-tripping composite structure embedded sleeve

Abstract

The anti-tripping composite structure embedded sleeve comprises a body and a stainless steel sleeve, the body is of a tubular structure with one end opened and the other end sealed, external threads, used for being combined with the interior of a sleeper, on the outer circumferential wall of the body are single continuous threads, and the stainless steel sleeve is embedded in the inner wall of the body. And the internal thread on the inner wall of the stainless steel sleeve is combined with the internal thread on the body to form a continuous thread with a consistent thread shape. By optimizing the structure of the pre-embedded sleeve, the torsional shear strength and the tensile strength of the internal thread are further enhanced, the surface hardness of the internal thread of the pre-embedded sleeve is increased, the friction coefficient is reduced, and the service life of the pre-embedded sleeve is prolonged. The potential safety hazard that the pre-embedded sleeve made of the glass fiber reinforced nylon 66 composite material is tripped in construction assembly and operation is solved, and the situation that the surface of the internal thread is scratched due to friction and shearing in the fastening process of the pre-embedded sleeve and a screw spike under the conditions that hard impurities are mixed in the pre-embedded sleeve and water is accumulated and ice is formed is avoided; and the risk of potential failure of the pre-embedded sleeve is further caused.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit technical field, concretely relates to a prevent tripping composite structure embedded sleeve. BACKGROUND

[0002] With the rapid development of urban rail transit in China, many prefabricated components such as sleepers, prefabricated plates and segments adopt the design structure of embedded nylon sleeve for installing related equipment and devices; especially for the track system, almost all track fasteners adopt spiral spikes and sleeves embedded in the track bed (sleeper) for connection and fastening to realize the clamping of the steel rail. Although the sleeve is made of glass fiber reinforced nylon 66 composite material, which has excellent electrical insulation, corrosion resistance and mechanical properties, the surface hardness and absolute strength of the sleeve are lower than those of the metal spiral spike; therefore, the tripping phenomenon (referring to the damage phenomenon of the fracture and shedding of the internal thread of the sleeve) often occurs in the field construction and operation maintenance; as the displacement fastening component for connecting the fastener and the foundation for clamping the steel rail, the failure caused by tripping directly affects the stability of the steel rail, and in severe cases, it is easy to cause derailment and other major safety hazards due to excessive displacement of the steel rail, therefore, it is necessary to improve the embedded sleeve for the above problems. SUMMARY

[0003] The utility model solves the technical problem: provide a prevent tripping composite structure embedded sleeve, through optimizing the structure of embedded sleeve, the body inside inserts the stainless steel sleeve with internal thread, and the internal thread on the inner wall of the stainless steel sleeve is combined with the internal thread on the body into continuous thread with consistent thread shape, so that the internal thread torsional shear strength and tensile strength are further strengthened, not only increase the surface hardness of the internal thread of the embedded sleeve, reduce the friction coefficient, solve the unsafe hidden danger of the embedded sleeve made of glass fiber reinforced nylon 66 composite material in construction assembly and operation, avoid the scratch on the surface of the internal thread due to friction and shear in the process of fastening under the condition of hard impurities and water icing in the embedded sleeve and spiral spike, and further cause the risk of potential failure of the embedded sleeve, simple structure, novel design, low cost, high safety and reliability.

[0004] The utility model adopts the technical scheme: prevent tripping composite structure embedded sleeve, including body and stainless steel sleeve, the body is the tubular structure of one end opening and the other end sealing, and the external thread on the outer circumferential wall of the body for combining with the internal thread of the sleeper is single continuous thread, the stainless steel sleeve is embedded on the inner wall of the body, and the internal thread on the inner wall of the stainless steel sleeve is combined with the internal thread on the body into continuous thread with consistent thread shape.

[0005] Among them, the length of the stainless steel sleeve is four times the pitch of the internal thread.

[0006] Further, the stainless steel sleeve is located in the middle and lower section of the internal thread of the body.

[0007] Further, the position of the stainless steel sleeve in the body is that the lower edge of the stainless steel sleeve is located at a position two times of the pitch from the bottom in the thread in the body.

[0008] Further, the embedded sleeve is an integral structure formed by injection molding of the body made of glass fiber reinforced nylon 66 composite material and the stainless steel sleeve.

[0009] Compared with the prior art, the utility model has the advantages that:

[0010] 1. The technical scheme optimizes the structure of the embedded sleeve, embeds the stainless steel sleeve with internal thread in the body, and combines the internal thread on the inner wall of the stainless steel sleeve with the internal thread on the body into a continuous thread with consistent thread shape, so that the torsional shear strength and tensile strength of the internal thread are further strengthened, the surface hardness of the internal thread of the embedded sleeve is increased, the friction coefficient is reduced, and the unsafe hidden danger that the embedded sleeve made of glass fiber reinforced nylon 66 composite material is disconnected during construction assembly and operation is solved.

[0011] 2. The technical scheme adopts the integral embedded sleeve formed by injection molding of the body made of glass fiber reinforced nylon 66 composite material and the stainless steel sleeve, the torsional shear strength and tensile strength of the internal thread are further strengthened, and the axial pre-tightening force can efficiently guarantee the requirements of anti-loosening and anti-disconnection under the action of repeated dynamic fatigue load and dynamic impact load.

[0012] 3. The technical scheme has simple structure, novel design, low cost, and high safety and reliability, and avoids scratches on the surface of the internal thread caused by friction and shearing during the fastening process of the embedded sleeve and the spiral spike under the condition of hard impurities and frozen water in the embedded sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is an internal structure schematic view of the utility model connected with the spiral spike.

[0014] Fig. 2 It is an internal structure schematic view of the utility model. DETAILED DESCRIPTION

[0015] The technical scheme in the embodiments of the utility model will be clearly and completely described below. Figs. 1-2 The technical scheme in the embodiments of the utility model will be clearly and completely described below.

[0016] It should be noted that, in this article, unless otherwise stated, it is understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In this article, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations. The element defined by the statement "includes a..." does not exclude the presence of another identical element in the process, method, article or device that includes the element.

[0018] The anti-tripping composite structure embedded sleeve, as shown in Figs. 1-2 The body 1 is a tubular structure with one end open and the other end sealed, and the external thread on the outer circumferential wall of the body 1 for internal combination with the sleeper is a single continuous thread, which is used to enhance the surface hardness of the internal thread, moderately reduce the surface friction coefficient and prevent the embedded sleeve from tripping during construction assembly and operation; the stainless steel sleeve 2 is embedded in the inner wall of the body 1, and the internal thread on the inner wall of the stainless steel sleeve 2 is combined with the internal thread on the body 1 into a continuous thread with consistent thread shape; specifically, the embedded sleeve is an integral structure formed by injection molding of the body 1 made of glass fiber reinforced nylon 66 composite material and the stainless steel sleeve 2; in the above structure, by optimizing the structure of the embedded sleeve, the stainless steel sleeve 1 with internal thread is embedded in the body 1, and the internal thread on the inner wall of the stainless steel sleeve 2 is combined with the internal thread on the body 1 into a continuous thread with consistent thread shape, so that the torsional shear strength and tensile strength of the internal thread are further enhanced, not only increasing the surface hardness of the internal thread of the embedded sleeve, but also reducing the friction coefficient and solving the unsafe hidden danger of the embedded sleeve made of glass fiber reinforced nylon 66 composite material tripping during construction assembly and operation;

[0019] Wherein, the length of the stainless steel sleeve 2 is four times the pitch of its internal thread; specifically, the stainless steel sleeve 2 is located in the middle and lower segment of the internal thread of the body 1; specifically, the position of the stainless steel sleeve 2 in the body 1 is that the lower edge of the stainless steel sleeve 2 is located at the position of the internal thread of the body 1 which is two times the pitch from bottom to top.

[0020] The structure realizes the connection and fastening of the rail fastener to the rail and the tie (track bed) by the use of the screw spike 3 embedded in the tie (track bed), meets the connection requirement of repeated disassembly and assembly for multiple fine adjustment of the rail welding link, and has excellent electric insulation, corrosion resistance and mechanical properties with the friction coefficient of the continuous thread of the traditional single nylon reduced by 60% compared with the internal thread of the embedded sleeve.

[0021] The technical solution has the advantages of simple structure, novel design, low cost, continuous thread of the internal thread combining the injection molding nylon thread and the internal thread of the finished stainless steel sleeve 2, obvious improvement of the surface hardness and wear resistance compared with the traditional single nylon continuous thread, high safety and reliability, and efficient guarantee of the requirements of the embedded sleeve anti-loose and anti-tripping under the repeated dynamic fatigue load and dynamic impact load.

[0022] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, the scope of the utility model is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

[0023] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An anti-tripping composite structure embedded sleeve, characterized in that: The utility model relates to a pre-embedded sleeve for a rail sleeper, comprising a body (1) and a stainless steel sleeve (2), the body (1) is a tubular structure with one end open and the other end closed, and the external thread on the outer circumferential wall of the body (1) for combination with the inside of the rail sleeper is a single continuous thread, the stainless steel sleeve (2) is embedded on the inner wall of the body (1), and the internal thread on the inner wall of the stainless steel sleeve (2) is combined with the internal thread on the body (1) into a continuous thread with the same thread shape.

2. The anti-tripping composite structure pre-embedded sleeve according to claim 1, characterized in that: The length of the stainless steel sleeve (2) is four times the pitch of the internal thread thereof.

3. The anti-tripping composite structure pre-embedded sleeve according to claim 2, characterized in that: The stainless steel sleeve (2) is located in the middle and lower section of the internal thread of the body (1).

4. The anti-tripping composite structure pre-embedded sleeve according to claim 2, characterized in that: The position of the stainless steel sleeve (2) in the body (1) is such that the lower edge of the stainless steel sleeve (2) is located at a position two times the pitch of the internal thread of the body (1) from the bottom.

5. The anti-tripping composite structure pre-embedded sleeve according to any one of claims 1-4, characterized in that: The pre-embedded sleeve is an integrated structure formed by injection molding of the body (1) and the stainless steel sleeve (2) using a glass fiber reinforced nylon 66 composite material.

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