CN109950853B - Heat-preserving weight-increasing cover plate for railway engineering - Google Patents

Abstract

The invention discloses a heat-insulating weight-increasing cover plate for railway engineering, wherein a reinforcing rib net is formed by protruding reinforcing ribs which are fixedly connected to the bottom of a panel and criss-cross; the bottom of the reinforcing rib net is provided with a mounting groove, a connecting nut is embedded in the crossing joint of the reinforcing ribs in the mounting groove, and the weight increasing layer and the heat insulating layer are sequentially positioned in the mounting groove from top to bottom; the backboard, the heat preservation layer and the weight increasing layer are respectively provided with bolt holes corresponding to the connecting nuts, the connecting bolts penetrate through the threaded holes to be in threaded connection with the connecting nuts, and the mounting groove is blocked through the backboard; according to the invention, the panel, the reinforcing ribs and the backboard are formed by adopting graphene fiber reinforced composite materials through a high-temperature and high-pressure mould pressing process, so that higher structural strength is ensured, the heat preservation layer and the weight increasing layer can realize the double effects of heat preservation and weight increasing, and the cover plate has the functions of heat preservation and self stability enhancement while having larger carrying capacity.

Description

A kind of heat-insulating and weight-increasing cover plate for railway engineering

Technical Field

The invention relates to the technical field of railway engineering, and more particularly to a heat-insulating weight-increasing cover plate for railway engineering.

Background technique

In recent years, my country's high-speed railway has developed rapidly. On the basis of the large number of high-speed railway lines that have been built, there are still a large number of branch railways, intercity railways and subway lines being planned and constructed, so a new upsurge in railway construction is about to be set off.

On both sides of the railway tunnel, there are cable troughs for laying cables and trenches for drainage. Usually, in order to protect the cables, a cover plate is provided on the cable trough. At the same time, in order to ensure the smooth flow of the trench and prevent debris from entering the trench, a cover plate is also provided on the trench.

At present, the cable trough cover of the railway prestressed concrete box beam is also used as the sidewalk tread, and prefabricated reinforced concrete slabs, prefabricated RPC (reactive powder concrete) slabs, or prefabricated inorganic composite concrete slabs are often used. Concrete T-beam sidewalk treads mainly use prefabricated reinforced concrete slabs or steel plates. Prefabricated reinforced concrete slabs are prone to cracks, exposed steel bars, carbonization, etc., and have the disadvantages of heavy weight, easy damage, poor thermal insulation performance, poor sealing, and poor integrity.

Steel plates are prone to rust, and prefabricated RPC plates and prefabricated inorganic composite concrete plates have high requirements for manufacturing processes. If the quality is poor, they will have problems such as insufficient strength, cracking or deformation. In short, cable trough covers made of traditional materials are prone to deterioration and have poor durability. In addition, the traditional cover body is heavy, which makes regular inspection and maintenance inconvenient, and the engineering management cost is high. When there is a problem with the cover, it will cause tunnel trench blockage, poor drainage, personal injury and damage to engineering machinery, which will cause secondary disasters such as subsidence of the base, ice on the roadbed, and impact on operations.

At the same time, on the one hand, the railway engineering cover is usually a single-layer reinforced concrete integrated structure, which cannot achieve the effect of thermal insulation. However, my country has a vast territory and there are many completely different climates and usage conditions, so the requirements for the thermal insulation function of the cover are also different, which requires the cover in the cold use environment to have thermal insulation function;

On the other hand, the trains on existing railways run at a relatively high speed. When a high-speed train passes by, a strong negative pressure space will be formed near the track. The existence of a negative pressure environment will often affect objects around the track, so there are certain requirements for the deadweight of the cover. The cover used in railway engineering is required to have a certain deadweight to resist the negative pressure attraction generated by the passing of high-speed trains.

Therefore, how to provide a thermal insulation and weight-added cover plate for railway engineering with high structural strength, good thermal insulation performance and large deadweight is a problem that technical personnel in this field urgently need to solve.

Summary of the invention

In view of this, the present invention provides a thermal insulation and weight-added cover plate for railway engineering, in which the panel and the reinforcing ribs are formed by a high-temperature and high-pressure molding process using graphene fiber-reinforced composite materials, thereby ensuring a high structural strength. The provided thermal insulation layer can achieve excellent thermal insulation effect, so that the cover plate has a large load-bearing capacity and a thermal insulation function at the same time, and is suitable for use in low-temperature occasions; the provided weight-added layer can resist the negative pressure attraction generated when a high-speed train passes by, and maintain its own stability, so that the cover plate has a large load-bearing capacity and a strong own stability at the same time, and is suitable for use in high-speed train construction engineering occasions; when paving, two adjacent thermal insulation and weight-added cover plates for railway engineering are connected in a step-like manner, and have good sealing properties.

In order to achieve the above object, the present invention adopts the following technical solution:

A thermal insulation and weight-added cover plate for railway engineering, comprising a panel, a reinforcing rib net, an insulating layer, a weight-added layer and a back plate; wherein the reinforcing rib net is composed of raised reinforcing ribs fixedly connected to the bottom of the panel and criss-crossed; a mounting groove is provided at the bottom of the reinforcing ribs located in the middle of the reinforcing rib net, and connecting nuts are pre-embedded at the intersection nodes of the reinforcing ribs in the mounting groove, and the weight-added layer and the insulating layer are sequentially located in the mounting groove from top to bottom; bolt holes corresponding to the connecting nuts are provided on the back plate, the insulating layer and the weight-added layer, and the connecting bolts pass through the threaded holes and are threadedly connected to the connecting nuts, and the mounting groove is blocked by the back plate.

In the present invention, the panel is fixedly connected to the reinforcing rib net, and the overall structural strength is enhanced by the support of the panel by the reinforcing rib net, so that the cover plate has a higher load-bearing capacity. The installation groove opened at the bottom of the reinforcing rib net can accommodate a thermal insulation layer with good thermal insulation effect and a weight-increasing layer with a weight-increasing effect, so that the cover plate achieves the functions of thermal insulation and weight-increasing without increasing the overall thickness of the cover plate; connecting nuts are pre-embedded at the intersection nodes of the reinforcing ribs in the installation groove, and the back plate is fixed to the opening of the installation groove by screwing the connecting nuts and connecting bolts to achieve sealing of the notch of the installation groove, which can not only lift the thermal insulation layer and the weight-increasing layer under the panel and the reinforcing rib net, but also achieve sealing of the thermal insulation layer and the weight-increasing layer, prevent moisture and water from entering the installation groove to affect the thermal insulation effect, and prevent the residue of the weight-increasing layer from leaking through the gap to affect the weight-increasing effect.

Preferably, in the above-mentioned thermal insulation and weight-increasing cover plate for railway engineering, one side edge of the panel extends outward to form a step-jointed male edge, and the other side edge opposite to the panel is recessed inward to form a step-jointed female edge matched with the step-jointed male edge.

The beneficial effect of adopting the above technical solution is that during paving, the overlap between the thermal insulation and weight-added cover plates for adjacent railway projects can be achieved, and a certain overlap sealing performance can be achieved.

Preferably, in the above-mentioned thermal insulation and weight-increasing cover plate for railway engineering, the back plate adopts a convex groove design on all sides, and the groove opening faces away from the thermal insulation layer.

The beneficial effect of adopting the above technical solution is: after the back panel is fixed by connecting bolts, the raised groove walls around the back panel can fit tightly with the inner wall of the installation groove, sealing the installation groove where the insulation layer is located, preventing moisture and water from entering the installation groove and affecting the insulation effect, and preventing the weight-added layer from leaking through the gaps due to friction or vibration during daily use, thereby affecting the weight-added effect.

Preferably, in the above-mentioned thermal insulation weight-added cover plate for railway engineering, grooves corresponding to the raised reinforcing ribs are provided on the weight-added layer, so that the weight-added layer can be embedded in the reinforcing rib net.

The beneficial effects of adopting the above technical solution are: enabling the weight-increasing layer to be partially embedded in the reinforcing rib net, reducing the slotting depth of the installation slot, and reducing the impact of slotting on the reinforcing rib net on its structural strength.

Preferably, in the above-mentioned thermal insulation and weight-added cover plate for railway engineering, the thermal insulation layer is an insulation board made of polyurethane rigid foam thermal insulation material, which has a good thermal insulation effect.

Preferably, in the above-mentioned thermal insulation and weight-increasing cover plate for railway engineering, the weight-increasing layer is made of solidified concrete, which not only has a good weight-increasing effect but also has low cost.

Preferably, in the above-mentioned thermal insulation and weight-added cover plate for railway engineering, the reinforcing ribs are reinforcing rib plates perpendicular to the panel, and the criss-crossing reinforcing rib plates are perpendicular to each other.

The beneficial effect of adopting the above technical solution is: enhancing the strength of the reinforcing rib mesh and the panel structure.

Preferably, in the above-mentioned thermal insulation and weight-added cover plate for railway engineering, 9 groups of the connecting bolts and the connecting nuts are matched and arranged, and are evenly distributed on the back plate and the reinforcing rib net, respectively, so that the thermal insulation layer and the back plate are evenly stressed and the connection is firm.

Preferably, in the above-mentioned thermal insulation and weight-increasing cover plate for railway engineering, the connecting bolts are stainless steel bolts, and the connecting nuts are stainless steel nuts to prevent rust.

Preferably, in the above-mentioned thermal insulation and weight-gaining cover plate for railway engineering, the reinforcing rib mesh and the panel are an integrated structure with strong mechanical properties, and the reinforcing rib mesh, the panel and the back plate are all made of graphene fiber reinforced composite materials through a high temperature and high pressure molding process.

It can be known from the above technical scheme that, compared with the prior art, the present invention discloses a heat-insulating and weight-increasing cover plate for railway engineering. In the present invention, the panel is fixedly connected with the reinforcing rib net, and the panel is strongly supported by the reinforcing rib net. The reinforcing ribs are reinforcing rib plates perpendicular to the panel, and the criss-crossed reinforcing rib plates are perpendicular to each other, which enhances the overall structural strength of the reinforcing rib net and the panel, so that the cover plate has a higher load-bearing capacity; the installation groove provided at the bottom of the reinforcing rib net can accommodate an insulation layer with good heat-insulating effect and a weight-increasing layer with a weight-increasing effect, so that the cover plate realizes the heat-insulating and weight-increasing functions without increasing the overall thickness of the cover plate, and the weight-increasing layer is provided with grooves corresponding to the raised reinforcing ribs, so that the weight-increasing layer can be partially embedded in the reinforcing rib net, thereby reducing the groove depth of the installation groove and reducing the influence of the grooves on the reinforcing rib net on its structural strength;

Connecting nuts are embedded at the intersection nodes of the reinforcing ribs in the installation groove. The back panel is fixed to the opening of the installation groove by screwing the connecting nuts and the connecting bolts to achieve sealing of the installation groove opening. Not only can the thermal insulation layer and the weight-added layer be lifted under the panel and the reinforcing rib net, but the thermal insulation layer and the weight-added layer can also be sealed. The back panel adopts a raised groove design on all sides, and the groove opening faces away from the thermal insulation layer. After the back panel is fixed by connecting bolts, the raised groove walls on all sides of the back panel can fit tightly with the inner wall of the installation groove, thereby sealing the installation groove where the thermal insulation layer and the weight-added layer are located, preventing moisture and water from entering the installation groove to affect the thermal insulation effect, and preventing the weight-added layer from leaking through the gaps due to friction or vibration during daily use to affect the weight-added effect.

One side of the panel extends outward to form a stepped overlapping male edge, and the other side of the panel opposite to the panel is recessed inward to form a stepped overlapping female edge that matches the stepped overlapping male edge. During paving, the overlapping of the thermal insulation and weight-added cover plates for adjacent railway projects can be achieved, and a certain overlapping sealing performance can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

Figure 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a bottom view of the present invention;

Fig. 5 is a cross-sectional view of the present invention;

FIG. 6 is an assembly diagram of the present invention.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The embodiment of the present invention discloses a thermal insulation and weight-added cover plate for railway engineering. The panel and reinforcing ribs are formed by a high-temperature and high-pressure molding process using a graphene fiber-reinforced composite material, thereby ensuring a relatively high structural strength. The provided thermal insulation layer can achieve an excellent thermal insulation effect, so that the cover plate has a large load-bearing capacity and a thermal insulation function at the same time, and is suitable for use in low-temperature environments. During paving, two adjacent thermal insulation and weight-added cover plates for railway engineering are connected in a stepped manner, and have a relatively good sealing property.

In conjunction with Figures 1-6, an embodiment of the present invention discloses a thermal insulation and weight-added cover plate for railway engineering, comprising a panel 1, a reinforcing rib mesh 2, an insulation layer 3, a weight-added layer 6 and a back plate 4; wherein the reinforcing rib mesh 2 is composed of raised reinforcing ribs fixedly connected to the bottom of the panel 1 and criss-crossed; an installation groove is provided at the bottom of the reinforcing ribs located in the middle of the reinforcing rib mesh 2, and connecting nuts are pre-embedded at the intersection nodes of the reinforcing ribs in the installation groove, and the weight-added layer 6 and the insulation layer 3 are sequentially located in the installation groove from top to bottom; bolt holes corresponding to the connecting nuts are provided on the back plate 4, the insulation layer 3 and the weight-added layer 6, and the connecting bolts 5 pass through the threaded holes and are screwed to the connecting nuts, and the installation groove is blocked by the back plate 4.

In order to further optimize the above technical solution, one side of the panel 1 is extended outward to form a stepped overlapping male edge, and the other opposite side of the panel 1 is recessed inward to form a stepped overlapping female edge adapted to the stepped overlapping male edge.

The beneficial effect of adopting the above technical solution is that during paving, the overlap between the thermal insulation and weight-added cover plates for adjacent railway projects can be achieved, and a certain overlap sealing performance can be achieved.

In order to further optimize the above technical solution, the back plate 4 adopts a convex groove design on all sides, and the groove opening faces away from the thermal insulation layer 3.

The beneficial effect of adopting the above technical solution is: after the back plate 4 is fixed by connecting bolts 5, the raised groove walls around the back plate 4 can fit tightly with the inner wall of the installation groove, thereby sealing the installation groove where the insulation layer 3 is located, preventing moisture and water from entering the installation groove and affecting the insulation effect, and preventing the weight-added layer 6 from leaking through the gaps due to friction or vibration during daily use, thereby affecting the weight-added effect.

In order to further optimize the above technical solution, grooves corresponding to the raised reinforcing ribs are provided on the weight-increasing layer 6 so that the weight-increasing layer 6 can be partially embedded in the reinforcing rib net 2 .

The beneficial effects of adopting the above technical solution are: the weight-increasing layer 6 can be partially embedded in the reinforcing rib mesh 2, the slotting depth of the installation slot is reduced, and the influence of slotting on the reinforcing rib mesh 2 on its structural strength is reduced.

In order to further optimize the above technical solution, the insulation layer 3 is an insulation board made of polyurethane rigid foam insulation material, which has a good insulation effect.

In order to further optimize the above technical solution, the weight-increasing layer 6 is made of solidified concrete, which not only has a good weight-increasing effect but also has a low cost.

In order to further optimize the above technical solution, the reinforcing ribs are reinforcing rib plates perpendicular to the panel 1, and the criss-crossing reinforcing rib plates are perpendicular to each other.

The beneficial effect of adopting the above technical solution is that the structural strength of the reinforcing rib mesh 2 and the panel 1 is enhanced.

In order to further optimize the above technical solution, 9 groups of connecting bolts 5 and connecting nuts are provided, which are evenly distributed on the back plate 4 and the reinforcing rib mesh 2, so that the insulation layer 3 and the back plate 4 are evenly stressed and the connection is firm.

In order to further optimize the above technical solution, the connecting bolts 5 are stainless steel bolts and the connecting nuts are stainless steel nuts to prevent rust.

In order to further optimize the above technical solution, the reinforcing rib mesh 2 and the panel 1 are an integrated structure with strong mechanical properties. The reinforcing rib mesh 2, the panel 1 and the back panel 4 are all made of graphene fiber reinforced composite materials through a high temperature and high pressure molding process.

In order to further optimize the above technical scheme, the weight of the weight-gain layer 3 is selected according to the actual usage occasions. For train speeds of 200-300KM/h, a light weight weight-gain layer is used, and for train speeds of more than 300KM/h, a medium weight weight-gain layer is used. The weight of the weight-gain layer 3 is adjusted by adjusting the amount of concrete used in the production of the weight-gain layer 3.

In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The heat-insulating weight-increasing cover plate for the railway engineering is characterized by comprising a panel, a reinforcing rib net, a heat-insulating layer, a weight-increasing layer and a back plate; wherein, the reinforcing rib net is composed of protruding reinforcing ribs which are fixedly connected to the bottom of the panel and criss-cross; the bottom of the reinforcing rib positioned in the middle of the reinforcing rib net is provided with a mounting groove, a connecting nut is pre-buried at the crossing node of the reinforcing rib positioned in the mounting groove, and the weight-increasing layer and the heat-insulating layer are sequentially positioned in the mounting groove from top to bottom; the back plate, the heat preservation layer and the weight increasing layer are respectively provided with bolt holes corresponding to the connecting nuts, the connecting bolts penetrate through the bolt holes to be in threaded connection with the connecting nuts, and the mounting groove is blocked through the back plate.

2. The heat-insulating and weight-increasing cover plate for railway engineering according to claim 1, wherein one side edge of the panel extends to form a step lap joint public edge, and the other opposite side edge of the panel is recessed inwards to form a step lap joint female edge matched with the step lap joint public edge.

3. The heat-insulating and weight-increasing cover plate for railway engineering according to claim 1, wherein the back plate is designed as a groove with raised periphery, and the opening of the groove faces away from the heat-insulating layer.

4. The heat-insulating and weight-increasing cover plate for railway engineering according to claim 1, wherein grooves corresponding to the raised reinforcing ribs are formed in the weight-increasing layer, so that the weight-increasing layer can be embedded into the reinforcing rib net.

5. The heat-insulating weight-increasing cover plate for railway engineering according to claim 1, wherein the heat-insulating layer is a heat-insulating plate made of polyurethane rigid foam heat-insulating materials.

6. The heat-insulating and weight-increasing cover plate for railway engineering according to claim 1, wherein the weight-increasing layer is made by solidifying concrete.

7. The heat-insulating and weight-increasing cover plate for railway engineering according to claim 1, wherein the reinforcing ribs are reinforcing rib plates perpendicular to the face plates, and the reinforcing rib plates which are crisscrossed are perpendicular to each other.

8. The heat-insulating weight-increasing cover plate for railway engineering according to claim 1, wherein 9 groups of connecting bolts and connecting nuts are arranged in a matched mode and are uniformly distributed on the back plate and the reinforcing rib net respectively.

9. The heat preservation and weight gain cover plate for railway engineering according to claim 8, wherein the connecting bolt is a stainless steel bolt, and the connecting nut is a stainless steel nut.

10. The heat-insulating weight-increasing cover plate for railway engineering according to claim 1, wherein the reinforcing rib net and the panel are of an integrated structure, and the reinforcing rib net, the panel and the back panel are all integrally manufactured by adopting graphene fiber reinforced composite materials through a high-temperature high-pressure die pressing process.