Folding-inward buffer protection type highway guardrail

Abstract

The present invention relates to the technical field of highway guardrails, and more specifically, to a highway guardrail based on an inward-folding buffer protection type. It includes a buffer system and vertical bodies arranged at both ends of the buffer system, a transverse guard body of the buffer system and a vertical guard body, the transverse guard body is a wave-shaped structure arranged horizontally between the two vertical bodies, and a buffer portion is formed at the bending part of the transverse guard body; the vertical guard body is arranged corresponding to the buffer portion of the transverse guard body, and the vertical guard body has an inner side body and an outer side body arranged oppositely, and an internal space is formed between the inner side body and the outer side body, and the transverse guard body passes through the inner side body so that the buffer portion is located in the internal space and fits with the outer side body. In the present invention, two intersection points are formed by the transverse guard body moving in and out on the inner guard plate, and another intersection point is formed by the bent buffer portion fitting the outer guard plate, so that a single vertical guard body can form three intersection points with the transverse guard body, thereby increasing the force points between the vertical guard body and the transverse guard body.

Description

Technical Field

[0001] The present invention relates to the technical field of highway guardrails, and specifically, to an inward-folded buffer protection type highway guardrail. Background Art

[0002] Highway guardrails are essential protective tools on roads, and their functions are as follows:

[0003] 1. It can prevent vehicles from driving off the road or prevent out-of-control vehicles from crossing the central isolation belt and driving into the oncoming lane;

[0004] 2. When a vehicle collides with the guardrail, it can smoothly transition the movement trajectory of the vehicle, make the vehicle return to the normal driving direction, and reduce the possibility of secondary accidents;

[0005] 3. Once an out-of-control vehicle collides with the guardrail, it can weaken the injuries to the driver and passengers;

[0006] 4. It can induce the driver's line of sight and clearly see the road ahead and the road profile.

[0007] Requirements for the buffer protection ability of the guardrail are imposed in both points 2 and 3. Common highway guardrails are composed of vertical and horizontal plate bodies or rod bodies. As Figure 14 shown, the highway guardrail includes a horizontal protective body 210 in the horizontal direction and a vertical protective body 220 in the vertical direction. A plurality of vertical protective bodies 220 and horizontal protective bodies 210 can be provided in their respective directions. However, there is only one intersection point between each horizontal protective body 210 and vertical protective body 220. Figure 14 In [reference], there are two horizontal protective bodies 210 and two vertical protective bodies 220, and the intersection points formed between them are four, namely points A, B, C, and D. When facing vehicle impacts, the more intersection points there are, it means that after being impacted, the more points on the formed protective surface can bear force, and the better the provided buffer effect is.

[0008] In order to improve the buffer effect of the protective surface, a collision-resistant road guardrail is disclosed in Chinese Patent Publication No.: CN206204838U. It includes a device body. A plurality of wave-shaped protective strips, block-shaped shock-absorbing plates, fixing plates made of PVC material, elevation signs, and nail studs are provided on the side of the device body. The protective strips are arranged in parallel, and the bottommost part of the wave shape of the protective strip is fixedly connected to the fixing plate through nail studs. A phase change-induced elastic steel, a frame layer, and a Q steel layer are provided inside the protective strip. This collision-resistant road guardrail is provided with triple protection facilities of protective strips, shock-absorbing plates, and shock-absorbing support plates, greatly improving the safety factor of this collision-resistant road guardrail.

[0009] The above-mentioned wave-shaped protective strip improves the buffering effect of the road guardrail. However, when connecting to the device body, only the wave crest or wave bottom forms an intersection point. Moreover, the protective strip of the above-mentioned guardrail only buffers the single-sided protective surface. If both sides of the protective surface are to have buffering capabilities, protective strips need to be provided on both sides. Summary of the Invention

[0010] The purpose of the present invention is to provide an internally folded buffer protection type highway guardrail to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above purpose, an internally folded buffer protection type highway guardrail is provided, which includes a buffer system and vertical bodies arranged at both ends of the buffer system. The two vertical bodies placed on the road surface are used to support the buffer system, so that the buffer surface formed by the buffer system stands upright above the road surface. The buffer system at least includes:

[0012] A transverse protective body, the transverse protective body is a wave-shaped structure horizontally placed between two vertical bodies, and buffer parts are formed at the bending parts of the transverse protective body;

[0013] And,

[0014] A vertical protective body, the vertical protective body is arranged corresponding to the buffer part of the transverse protective body. The vertical protective body has an inner side body and an outer side body arranged oppositely, and an internal space is formed between the inner side body and the outer side body. The transverse protective body passes through the inner side body, so that the buffer part falls into the internal space and fits with the outer side body.

[0015] As a further improvement of this technical solution, the buffer part forms the wave crest and wave bottom of the transverse protective body in the internal space, two dividing lines are obtained by connecting the wave crest and the wave bottom, and a buffer space with buffer surfaces on both sides is constructed in cooperation with the vertical protective bodies on both sides.

[0016] As a further improvement of this technical solution, two openings for the transverse protective body to pass through are opened on the inner side body. The transverse protective body penetrates into the internal space through one of the openings, bends in the internal space and then penetrates out through the other opening.

[0017] As a further improvement of this technical solution, the vertical protective body includes an outer side guard plate and an inner side guard plate. The outer side guard plate constitutes the outer side body, and the inner side guard plate constitutes the inner side body;

[0018] The outer side guard plate and the inner side guard plate are connected to form an open internal space.

[0019] As a further improvement of this technical solution, the vertical protective body includes a protective shell with a hollow interior. A closed internal space is formed through the hollow part of the protective shell. The inner wall of the protective shell located on the inner side constitutes the inner side body, and the outer wall of the protective shell located on the outer side constitutes the outer side body.

[0020] Preferably, the length of the inner guard plate is longer than that of the outer guard plate, and the outer guard plate and the inner guard plate are fixedly connected by an elastic connecting plate, wherein:

[0021] The two opposed inner guard plates are fitted together.

[0022] Preferably, two adjacent inner guard plates on the same side are connected by an interlocking manner.

[0023] As a further improvement of the technical solution, a cross bar is arranged in the buffer space, and both ends of the cross bar are respectively fixed on two vertical bodies, and the vertical bodies pass through the central axis of the transverse body upward.

[0024] Preferably, a first elastic telescopic rod is arranged at a position corresponding to the vertical body on the cross bar, and the telescopic end of the first elastic telescopic rod is fixedly connected with the inner side body.

[0025] As a further improvement of the technical solution, a support body is arranged on the inner side body, the upper end of the support body is fixedly connected with the inner side body, and the lower end of the support body is fixed on the road surface on the opposite side of the inner side body.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. In the inner-fold buffer protection type highway guardrail, two intersection points are formed by the transverse body advancing and retreating on the inner guard plate, and another intersection point is formed by the bent buffer part fitting the outer guard plate. In this way, a single vertical body can form three intersection points with the transverse body, thereby increasing the stress points between the vertical body and the transverse body, improving the buffer effect after being impacted, and forming two buffer surfaces by the transverse body cooperating with the outer guard plates on both sides. At this time, no matter which side of the buffer surface is impacted, a buffer can be carried out by means of the transverse body.

[0028] 2. In the inner-fold buffer protection type highway guardrail, the closed cavity formed by the protective shell has stronger protection for the buffer part, thereby avoiding the influence of rainwater on the buffer part and the part of the transverse body forming the buffer part. At the same time, sand and gravel can be filled in the internal space to increase the weight of the entire guardrail, ensure the compressive capacity of the protective shell, effectively prevent the protective shell from deforming, and can also provide a supporting force for the transverse body after being impacted, further improving the compressive capacity of the transverse body.

[0029] 3. In the inner-fold buffer protection type highway guardrail, the set length of the inner guard plate is longer than that of the outer guard plate, and the two opposed inner guard plates can be fitted together. In this way, after the buffer surface on any side is impacted by a vehicle, the inner guard plate on the opposite side can play a supporting role.

[0030] 4. In the highway guardrail based on inward folding buffer protection, the two adjacent inner guard plates on the same side are also bitten together, and the biting can be achieved by wedging, snapping and plugging. In short, all the inner guard plates after biting form an intermediate body in the buffer space. The formation of the intermediate body improves the lateral hardness of the entire guardrail, thereby preventing the buffer surface on one side from bulging to the other side after being hit, thereby reducing the dangerous impact on vehicles traveling on the opposite road. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the guardrail of the present invention;

[0032] Figure 2 It is a schematic diagram of the lateral guard structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the vertical guard structure of the present invention;

[0034] Figure 4 This is a top view of the vertical guard structure of the present invention;

[0035] Figure 5 This is the second schematic diagram of the vertical guard structure of the present invention;

[0036] Figure 6 It is a schematic diagram of the internal structure of the vertical guard of the present invention;

[0037] Figure 7 The second top view of the vertical guard structure of the present invention;

[0038] Figure 8 The third is a top view of the vertical guard structure of the present invention;

[0039] Figure 9 It is a schematic diagram of the guardrail structure with a crossbar of the present invention;

[0040] Figure 10 A top view of a guardrail structure with a crossbar according to the present invention;

[0041] Figure 11 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 12 It is a schematic diagram of the structure of the outer guard plate and the inner guard plate of the present invention;

[0043] Figure 13 It is a top view of the outer guard plate and the inner guard plate structure of the present invention;

[0044] Figure 14 The second top view of the outer guard plate and the inner guard plate structure of the present invention;

[0045] Figure 15 Schematic diagram of a guardrail structure in the prior art;

[0046] Figure 16 Schematic diagram of the guardrail structure of the present invention with a support body.

[0047] The meanings of the various reference numerals in the figure are as follows:

[0048] 100, vertical body; 200, buffer system; 300, cross bar; 400, support body;

[0049] 210, horizontal protection body; 220, vertical protection body; 310, first elastic telescopic rod;

[0050] 210a, buffer part; 221, outer protection plate; 222, inner protection plate; 223, connecting block; 224, protective shell; 225, second elastic telescopic rod; 226, connecting plate; 220A, internal space. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0053] In addition, in the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0054] Highway guardrails are essential protective tools on roads, and their functions are as follows:

[0055] 1. It can prevent vehicles from driving off the road or prevent out-of-control vehicles from crossing the central separation belt and entering the oncoming lane;

[0056] 2. When a vehicle collides with the guardrail, it can smoothly transition the movement trajectory of the vehicle, make the vehicle return to the normal driving direction, and reduce the possibility of secondary accidents;

[0057] 3. Once a runaway vehicle collides with the guardrail, it can reduce the injuries to the driver and passengers;

[0058] 4. It can induce the driver's line of sight and enable the driver to clearly see the forward direction of the road and the road profile.

[0059] Requirements are imposed on the buffer protection ability of the guardrail in both points 2 and 3. Common highway guardrails are composed of vertical and horizontal plates or rods. As Figure 14 shown, the highway guardrail includes a horizontal protective body 210 in the horizontal direction and a vertical protective body 220 in the vertical direction. A plurality of horizontal protective bodies 210 and vertical protective bodies 220 can be provided in their respective directions, but there is only one intersection point between each horizontal protective body 210 and vertical protective body 220. Figure 14 In [the figure], there are two horizontal protective bodies 210 and two vertical protective bodies 220, and the intersection points formed between them are four, namely points A, B, C, and D. When facing vehicle impact, the more intersection points there are, it means that after being impacted, the more points on the formed protection surface can bear force, and the better the buffer effect provided.

[0060] In order to improve the buffer effect of the protection surface, in the prior art, the buffer effect of the road guardrail is improved by setting wavy protective strips. However, when connecting with the device body, only the wave crest or wave bottom forms an intersection point, and the protective strips of the above guardrail only buffer the single-sided protection surface. If both sides of the protection surface are to have buffer ability, protective strips need to be provided on both sides.

[0061] Therefore, the present invention provides an internally folded buffer protection type highway guardrail to solve the problems of how to use a wavy horizontal structure to increase its intersection points with the vertical structure and enable both sides of the protection surface to have buffer ability, as Figure 1As shown in the figure, the guardrail includes a buffer system 200 and vertical bodies 100 disposed at both ends of the buffer system 200. The buffer system 200 is supported by the two vertical bodies 100 placed on the road surface, so that the buffer system 200 stands upright on the road surface. The buffer system 200 includes a transverse protection body 210 and a vertical protection body 220. A plurality of transverse protection bodies 210 are arranged in the vertical direction, and both ends of the transverse protection body 210 are fixedly connected to the two vertical bodies 100 respectively. The fixed connection methods include bolt connection, welding, clamping, plugging, etc. Then, the transverse protection body 210 is supported by the vertical bodies 100 placed on the road surface. The transverse protection body 210 is a horizontally placed wavy structure, that is, the transverse protection body 210 is a wavy plane in the top view. The vertical protection body 220 is arranged corresponding to the wave crests and wave troughs of the transverse protection body 210. The vertical protection body 220 has two opposing faces, which are an inner face and an outer face respectively. An internal space 220A is formed between the inner face and the outer face. And each wave crest and wave trough fall within the internal space 220A of the corresponding vertical protection body 220. The transverse protection body 210 passes through the inner face and is bent in the internal space 220A. A buffer portion 210a is formed at the bending portion. The buffer portion 210a forms the wave crest and wave trough of the wavy transverse protection body 210 in the internal space 220A, and makes the wave crest and wave trough formed by the buffer portion 210a fit the outer face.

[0062] In addition, as Figure 2 shown, two dividing lines L1 and L2 are respectively connected to the wave crest and the wave trough. A buffer space with buffer surfaces on both sides is constructed between the two dividing lines L1 and L2 by cooperating with the vertical protection bodies 220 on both sides (the buffer space is shown by the dotted line parts in Figure 4 , Figure 7 , Figure 8 , Figure 10 , Figure 12 and Figure 13 ).

[0063] It should be noted that the water body of the wave above the still water surface on the water surface is called the wave crest, and the highest point of the wave crest is called the wave top; the space of the wave below the still water surface is called the wave trough, and the lowest point of the wave trough is called the wave bottom. In the present invention, the wave top and wave bottom are introduced because the transverse protection body 210 is a wavy structure, but there is no still water surface for demarcation. Therefore, any buffer portion 210a on one side of the transverse protection body 210 can be used as the wave top, and then the other buffer portion 210a is the wave bottom.

[0064] Furthermore, it should be noted that the meanings of the inner face and the outer face are not only a plane, but also can be a plate-like structure. The buffer surface is a virtual plane covered by the transverse protection body 210 and the vertical protection body 220, that is, a plane capable of buffering the impact of a vehicle.

[0065] The first embodiment is as follows Figure 3 As shown, in this embodiment, the vertical protective body 220 specifically includes an outer protective plate 221 and an inner protective plate 222. The outer protective plate 221 constitutes the outer side body, and the inner protective plate 222 constitutes the inner side body. After the outer protective plate 221 and the inner protective plate 222 are connected, an open internal space 220A is formed between them. Refer to Figure 4 As shown, in this embodiment, the outer protective plate 221 and the inner protective plate 222 are fixedly connected through a connecting block 223, and the horizontal protective body 210 penetrates into the inner protective plate 222 from one side, bends in the internal space 220A, and then penetrates out of the inner protective plate 222 from the other side. In this way, two openings for the horizontal protective body 210 to pass through need to be opened on the inner protective plate 222. In this embodiment, the openings match the outer contour of the horizontal protective body 210, and the buffer part 210a formed by bending in the internal space 220A fits the outer protective plate 221. Thus, two intersection points are formed by the horizontal protective body 210 entering and exiting the inner protective plate 222, and another intersection point is formed by means of the bent buffer part 210a fitting the outer protective plate 221. In this way, a single vertical protective body 220 can form three intersection points with the horizontal protective body 210, thereby increasing the stress points between the vertical protective body 220 and the horizontal protective body 210 and improving the buffer effect after being impacted. Moreover, two buffer surfaces are formed by the horizontal protective body 210 cooperating with the outer protective plates 221 on both sides of it. At this time, no matter which buffer surface is impacted, a buffer can be carried out by means of the horizontal protective body 210.

[0066] In the above process, two openings for the horizontal protective body 210 to pass through are opened on the inner side body. The horizontal protective body 210 penetrates into the internal space 220A from one of the openings, bends in the internal space 220A, and then penetrates out of the other opening.

[0067] In this embodiment, in the connection manner of the outer protective plate 221 and the inner protective plate 222, there is another implementation method, that is, the outer protective plate 221 and the inner protective plate 222 are connected through an elastic structure, so as to further improve the buffer effect. Specifically refer to Figure 8 As shown, the outer protective plate 221 is fixedly connected to the buffer part 210a. The outer protective plate 221 and the inner protective plate 222 are connected together through a second elastic telescopic rod 225 provided, and there is a space between the opening provided on the inner protective plate 222 and the outer contour of the horizontal protective body 210. In this space, the horizontal protective body 210 can be bent slightly, so as to adapt to the installation of the guardrail in this embodiment on a curve. As Figure 15 shown, E in the figure is the road surface.

[0068] Moreover, the buffer space in this embodiment is surrounded by the inner guard plate 222. Therefore, under the extrusion of an external object, the inner guard plate 222 can move towards the outer guard plate 221 to expand the buffer space. At this time, a protective layer such as sponge can be filled in the buffer space. However, the second elastic telescopic rod 225 in this embodiment does not have a buffering effect. Its purpose is to make the opening on the inner guard plate 222 fit the transverse body protector 210, thereby forming an intersection point.

[0069] The second embodiment is as follows Figure 5 As shown, in this embodiment, the vertical body protector 220 includes a protective shell 224. The inside of the protective shell 224 is hollow, and the hollow part forms a closed internal space 220A. The inner wall of the protective shell 224 located on the inner side constitutes the inner side surface body, and the outer wall located on the outer side constitutes the outer side surface body. Combining Figure 6 As shown, two openings are provided on the inner outer wall of the protective shell 224 for the transverse body protector 210 to penetrate into and out of the internal space 220A, and then the buffer part 210a formed by bending in the internal space 220A is attached to the outer inner wall of the protective shell 224.

[0070] Since the key point for the transverse body protector 210 to achieve buffering lies in the buffer part 210a formed by bending, the closed cavity formed by the protective shell 224 provides stronger protection for the buffer part 210a, thereby preventing the buffer part 210a and the part of the transverse body protector 210 forming the buffer part 210a from being affected by rain. Moreover, as Figure 7 shown, gravel can be filled in the internal space 220A to increase the weight of the entire guardrail, while ensuring the compressive resistance of the protective shell 224, effectively preventing the protective shell 224 from deforming, and also being able to provide a supporting force to the transverse body protector 210 after impact, further improving the compressive resistance of the transverse body protector 210.

[0071] In addition, in this embodiment, a buffer space is surrounded by the inner outer wall of the protective shell 224.

[0072] On the basis of the first embodiment, the third embodiment is disclosed. As Figure 11 shown, the vertical body protector 220 still includes the outer guard plate 221 and the inner guard plate 222. The difference is that the set length of the inner guard plate 222 is longer than that of the outer guard plate 221, and the outer guard plate 221 and the inner guard plate 222 are connected and fixed by an elastic connecting plate 226. Similarly, an open internal space 220A is formed between the outer guard plate 221 and the inner guard plate 222. In addition, the inner guard plate 222 can be a whole or composed of multiple independent individuals, but it is required that the two inner guard plates 222 facing each other can fit together. In this way, after the buffer surface on any side is impacted by a vehicle, the inner guard plate 222 on the opposite side can play a supporting role.

[0073] Furthermore, asFigure 12 and Figure 13 As shown, two adjacent inner guard plates 222 on the same side also bite together, and can be achieved by means of wedging, clamping and plugging. In short, all the inner guard plates 222 after biting form an intermediate body in the buffer space, and the hardness of the entire guardrail in the transverse direction is improved by the formation of the intermediate body, thereby preventing one side of the buffer surface from protruding to the other side after being impacted and reducing the dangerous impact on the vehicles driving on the opposite road.

[0074] The buffer space in this embodiment is surrounded by the outer guard plate 221.

[0075] The fourth embodiment is implemented based on the first or second embodiment. As Figure 9 shown, a cross bar 300 is arranged in the buffer space in this embodiment, and an intermediate body is formed by the cross bar 300. Both ends of the cross bar 300 are respectively fixed on two vertical bodies 100, and the vertical bodies 100 penetrate upward through the central axis of the transverse body 210. The hardness of the entire guardrail in the transverse direction is improved by the cross bar 300. Because it is connected to the vertical body 100 after penetrating the transverse body 210, further support is provided for the transverse body 210.

[0076] Moreover, as Figure 10 shown, a first elastic telescopic rod 310 is arranged at the position of the cross bar 300 corresponding to the vertical body 220. The telescopic end of the first elastic telescopic rod 310 is fixedly connected to the protective shell 224 or the inner guard plate 222 forming the inner side body, so as to buffer the acting force on the impact buffer surface by using the elastic force.

[0077] The fifth embodiment, as Figure 16 shown, a support body 400 is arranged on the protective shell 224 or the inner guard plate 222. The upper end of the support body 400 is fixedly connected to the protective shell 224 or the inner guard plate 222, and the lower end of the support body 400 is fixedly connected to the road surface on the opposite side. In this way, while reducing the space occupied by the support body 400, a span at the bottom of the support body 400 is ensured, thereby improving the support capacity of the support body 400 and preventing the guardrail from easily tipping over during use or impact.

[0078] It should be noted that Figure 9 , Figure 10 and Figure 16 all take the protective shell 224 as an example for illustration, so the application scope of the cross bar 300 and the support body 400 in this embodiment is not limited.

[0079] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. The internally-folded buffer protection type highway guardrail, which comprises a buffer system (200) and vertical bodies (100) arranged at both ends of the buffer system (200), and the two vertical bodies (100) placed on the road surface are used for supporting the buffer system (200) to make the buffer surface formed by the buffer system (200) stand upright above the road surface, is characterized in that: The buffer system (200) at least includes: A lateral protective body (210), which is a wavy structure horizontally placed between two vertical bodies (100), and buffer portions (210a) are formed at the bent portions of the lateral protective body (210); And, A vertical protective body (220), which is arranged corresponding to the buffer portions (210a) of the lateral protective body (210). The vertical protective body (220) has an inner side body and an outer side body arranged oppositely, and an internal space (220A) is formed between the inner side body and the outer side body. The lateral protective body (210) passes through the inner side body so that the buffer portions (210a) fall into the internal space (220A) and fit with the outer side body; The buffer portions (210a) form the wave crests and wave troughs of the lateral protective body (210) in the internal space (220A). Two demarcation lines are obtained by connecting the wave crests and wave troughs, and together with the vertical protective bodies (220) on both sides, a buffer space with buffer surfaces on both sides is constructed; Two openings for the lateral protective body (210) to pass through are formed on the inner side body. The lateral protective body (210) penetrates into the internal space (220A) through one of the openings, bends in the internal space (220A), and then penetrates out through the other opening.

2. The buffer protection type highway guardrail based on inner folding according to claim 1, wherein: The vertical protective body (220) includes an outer side guard plate (221) and an inner side guard plate (222). The outer side guard plate (221) constitutes the outer side body, and the inner side guard plate (222) constitutes the inner side body; The outer side guard plate (221) and the inner side guard plate (222) are connected to form an open internal space (220A).

3. The inner-fold buffer protection type highway guardrail according to claim 1, characterized in that: The vertical protective body (220) includes a hollow protective shell (224). A closed internal space (220A) is formed through the hollow part of the protective shell (224). The inner wall of the protective shell (224) located on the inner side constitutes the inner side body, and the outer wall of the protective shell (224) located on the outer side constitutes the outer side body.

4. The inner-fold buffer and protection type highway guardrail according to claim 2, wherein: The length of the inner side guard plate (222) is longer than that of the outer side guard plate (221). The outer side guard plate (221) and the inner side guard plate (222) are fixedly connected by an elastic connecting plate (226), where: Two opposite inner side guard plates (222) are attached to each other.

5. The inner-fold buffer protection type highway guardrail according to claim 4, characterized in that: Two adjacent inner side guard plates (222) on the same side are connected by an engaging method.

6. The inner-fold buffer protection type highway guardrail according to claim 1, characterized in that: A cross bar (300) is arranged in the buffer space. The two ends of the cross bar (300) are respectively fixed on two vertical bodies (100), and the vertical bodies (100) are axially penetrated upward through the center of the lateral protective body (210).

7. The inner-fold buffer protection type highway guardrail according to claim 6, characterized in that: First elastic telescopic rods (310) are arranged at positions corresponding to the vertical protective body (220) on the cross bar (300). The telescopic ends of the first elastic telescopic rods (310) are fixedly connected to the inner side body.

8. The inner-fold buffer protection type highway guardrail according to claim 1, characterized in that: A support body (400) is arranged on the inner side body. The upper end of the support body (400) is fixedly connected to the inner side body, and the lower end of the support body (400) is fixed on the road surface on the opposite side of the inner side body.

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