Anti-collision guardrail comprising Z-shaped stand columns

Abstract

The anti-collision guardrail comprises the Z-shaped stand column, the Z-shaped stand column comprises a first plate, a second plate and a third plate, the plate face of the first plate and the plate face of the second plate are oppositely arranged, the third plate is arranged between the first plate and the second plate, and the two side ends of the third plate are connected with the first side end of the first plate and the second side end of the second plate correspondingly; the extending direction of the first plate towards the first side end is opposite to the extending direction of the second plate towards the second side end. The cross section of the guardrail plate is in a wave shape; the guardrail plate is in threaded connection with the first plate or the second plate through the fragile bolt, and a screw rod of the fragile bolt is used for being disconnected when being subjected to force with preset magnitude so as to release the guardrail plate from the Z-shaped stand column. According to the anti-collision guardrail comprising the Z-shaped stand columns, the guardrail plates and the easily-broken bolts can all achieve the buffering and energy absorbing effects, and the buffering effect is good.

Description

Technical Field

[0001] This application relates to the technical field of road traffic guardrails, and particularly to an anti-collision guardrail including a Z-shaped column. Background Art

[0002] In road traffic, anti-collision guardrails are usually installed on both sides of the road. The anti-collision guardrail generally includes columns and guardrail plates. The columns are installed on the ground, and the guardrail plates are installed on the columns. When a vehicle hits the guardrail plates and columns, the guardrail plates and columns can play a certain role in blocking the vehicle. When the impact force is large, the columns and guardrail plates are separated from each other to guide the vehicle away from the road.

[0003] In the prior art, a buffer structure is mostly provided at the connection position between the column and the guardrail plate. The buffer structure can not only block the vehicle but also separate the column and the guardrail plate from each other. However, this solution has a single buffering method and a poor buffering effect. Summary of the Utility Model

[0004] The main purpose of this application is to provide an anti-collision guardrail including a Z-shaped column, aiming to solve the problems of single buffering method and poor buffering effect of the anti-collision guardrail mentioned in the background art.

[0005] To achieve the above object, this application provides an anti-collision guardrail including a Z-shaped column, comprising:

[0006] A Z-shaped column, the Z-shaped column includes a first plate, a second plate and a third plate. The plate surfaces of the first plate and the second plate are arranged opposite to each other. The third plate is arranged between the first plate and the second plate, and both side ends of the third plate are respectively connected to the first side end of the first plate and the second side end of the second plate. Wherein, the extending direction of the first plate towards its first side end is opposite to the extending direction of the second plate towards its second side end;

[0007] A guardrail plate, the cross-section of the guardrail plate is wavy;

[0008] A breakable bolt, the guardrail plate is screwed to the first plate or the second plate through the breakable bolt. The screw of the breakable bolt is used to break when a preset force is applied, so as to release the guardrail plate from the Z-shaped column.

[0009] In an embodiment of this application, a threaded hole is provided on the first plate and / or the second plate, and the threaded hole is used to install the breakable bolt.

[0010] In an embodiment of the present application, a first corner is provided at a third side end of the first plate opposite to the first side end, the first corner faces the third plate, and a second corner is provided at a position where the first plate is connected to the third plate. The first corner and the second corner are used for clamping and fixing the nut of the breakable bolt.

[0011] A third corner is provided at a fourth side end of the second plate opposite to the second side end, the third corner faces the third plate, and a fourth corner is provided at a position where the second plate is connected to the third plate. The third corner and the fourth corner are used for clamping and fixing the nut of the breakable bolt.

[0012] In an embodiment of the present application, the distance between the first plate and the second plate is 90 cm, and the lengths of the first plate and the second plate are 50 cm.

[0013] In an embodiment of the present application, the first plate, the second plate, and the third plate are integrally provided.

[0014] In an embodiment of the present application, a protrusion facing the third plate is provided on the first plate and / or the second plate, and the protrusion is located between the end of the Z-shaped column for installation on the ground and the screwing position.

[0015] In an embodiment of the present application, the breakable bolt includes a nut and a screw rod. The screw rod includes a first section and a second section. The first section is connected to the nut, and the second section is connected to the first section.

[0016] A round hole is provided inside the first section. The round hole is coaxial with the first section, and the diameter of the round hole is the same as the inner diameter of the external threads on the first section and the second section. There is a gap between the round hole and the second section, so that in the axial direction of the screw rod, an easily breakable part is formed at the gap part of the second section from the position connected to the first section to the round hole.

[0017] In an embodiment of the present application, the thickness of the easily breakable part is 1 ± 0.3 mm, and the inner diameter of the round hole is 11 ± 0.5 mm.

[0018] In an embodiment of the present application, the breakable bolt further includes a connecting platform. The connecting platform is provided between the nut and the screw rod, and the outer diameter of the connecting platform is larger than the outer diameter of the screw rod.

[0019] In an embodiment of the present application, the nut, the connecting platform, and the screw rod are of an integral structure;

[0020] An internal hexagonal hole or an internal triangular hole is provided at one end of the nut away from the screw rod;

[0021] The cross-section of the nut is external hexagonal or external triangular.

[0022] In the embodiments of the present application, both the Z-shaped column and the guardrail plate can separately play the roles of buffering and energy absorption. In addition, by providing a breakable bolt, when a certain magnitude of force is applied to the second section, the breakable part can break away from the first section, thereby also playing a buffering role. Therefore, the Z-shaped column, the guardrail plate, and the breakable bolt of the anti-collision guardrail including the Z-shaped column in the present application can all play the roles of buffering and energy absorption, and the buffering effect is relatively good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic structural diagram of an anti-collision guardrail including a Z-shaped column in an embodiment of the present application;

[0024] Figure 2 Cross-sectional view of a Z-shaped column in an embodiment of the present application;

[0025] Figure 3 Cross-sectional view of an anti-collision guardrail including a Z-shaped column in an embodiment of the present application;

[0026] Figure 4 is Figure 3 Enlarged view of the connection position between the Z-shaped column and the guardrail plate in the anti-collision guardrail including the Z-shaped column in

[0027] Figure 5 Cross-sectional view of a breakable bolt in an embodiment of the present application;

[0028] Figure 6 is Figure 5 Partial enlarged view of area S of the breakable bolt in

[0029] Figure 7 Schematic diagram after the breakable bolt in an embodiment of the present application is broken.

[0030] Reference numerals in the drawings: 100 - Z-shaped column, 110 - first plate, 111 - first side end, 112 - third side end, 113 - first corner, 114 - second corner, 120 - second plate, 121 - second side end, 122 - fourth side end, 123 - third corner, 124 - fourth corner, 130 - third plate, 140 - protrusion, 200 - guardrail plate, 300 - breakable bolt, 310 - screw rod, 311 - first section, 312 - round hole, 313 - breakable part, 314 - second section, 320 - nut, 330 - hole, 340 - nut, reinforcing part - 341, 350 - connecting platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0032] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, then the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0034] As Figure 1 shown, this exemplary embodiment provides an anti-collision guardrail including a Z-shaped column, comprising:

[0035] A Z-shaped column 100, the Z-shaped column 100 includes a first plate 110, a second plate 120, and a third plate 130. The plate surfaces of the first plate 110 and the second plate 120 are arranged opposite to each other. The third plate 130 is disposed between the first plate 110 and the second plate 120, and both side ends of the third plate 130 are respectively connected to the first side end 111 of the first plate 110 and the second side end 121 of the second plate 120. Wherein, the extending direction of the first plate 110 towards its first side end 111 is opposite to the extending direction of the second plate 120 towards its second side end 121;

[0036] A guardrail plate 200, the cross-section of the guardrail plate 200 is wavy;

[0037] A breakable bolt 300, the guardrail plate 200 is screwed to the first plate 110 or the second plate 120 through the breakable bolt 300. The screw 310 of the breakable bolt 300 is used to break when a preset force is applied, so as to release the guardrail plate 200 from the Z-shaped column 100.

[0038] As shown in Figure 1 the figure, the anti-collision guardrail includes a Z-shaped column 100 and a guardrail plate 200. One end of the Z-shaped column 100 is used to be installed under the ground of the road, and the other end is exposed above the ground. The guardrail plate 200 is installed on the part of the Z-shaped column 100 above the ground. The number of the Z-shaped columns 100 and the length of the guardrail plates 200 are related to the length of the road. That is, on a section of road, the anti-collision guardrail may include multiple guardrail plates 200 and multiple Z-shaped columns 100. The multiple Z-shaped columns 100 are arranged at intervals along the extension direction of the road, and the multiple guardrail plates 200 are connected to each other and installed on the multiple Z-shaped columns 100 along the extension direction of the road.

[0039] As shown in Figure 2 the figure, in the embodiment of the present application, the Z-shaped column 100 includes a first plate 110, a second plate 120 and a third plate 130. Figure 2 is a schematic cross-sectional view of the Z-shaped column 100 in an embodiment of the present application. Among them, the first plate 110, the second plate 120 and the third plate 130 can all be substantially rectangular plates, and the sizes and shapes of the first plate 110 and the second plate 120 can be the same. When the Z-shaped column 100 is installed on the ground, the first plate 110, the second plate 120 and the third plate 130 all extend vertically. The plate surfaces of the first plate 110 and the second plate 120 are parallel to the extension direction of the road. The plate surfaces of the first plate 110 and the second plate 120 are opposite to each other, and there is a gap between them. The third plate 130 is installed at the gap position between the first plate 110 and the second plate 120.

[0040] Continuing to refer to Figure 2 , after the Z-shaped column 100 is installed on the ground, in the horizontal direction, both side ends of the third plate 130 are respectively connected to the first side end 111 of the first plate 110 and the second side end 121 of the second plate 120. In the Figure 2 shown orientation, the first side end 111 is located below the first plate 110, the second side end 121 is located above the second plate 120, and the third plate 130 extends from Figure 2In the illustrated orientation, the lower side of the first plate 110 is inclined to the upper side of the second plate 120 , so that the first plate 110 , the second plate 120 , and the third plate 130 generally form an inverted “z”-shaped structure. When installed on the road, the first plate 110 or the second plate 120 faces the road, and the guardrail plate 200 is installed on the first plate 110 or the second plate 120. Taking the guardrail plate 200 installed on the first plate 110 as an example, when a vehicle hits the guardrail plate 200, the guardrail plate 200 transfers the impact force of the vehicle to the first plate 110. Since the column is roughly in an inverted "z" shape, when the plate surface of the first plate 110 is subjected to impact force, the angle at the connection position between the first plate 110 and the third plate 130 will become smaller, and when the impact force is transmitted along the third plate 130 to the second plate 120, the angle at the connection position between the third plate 130 and the second plate 120 will also become smaller. In this process, the first plate 110, the second plate 120 and the third plate 130 can absorb and buffer the impact of the vehicle.

[0041] like Figure 3 , Figure 4 As shown, in the embodiment of the present application, the cross section of the guardrail plate 200 is wavy. The guardrail plate 200 extends along the extension direction of the road in the horizontal direction, and the cross section of the guardrail plate 200 in the vertical direction is wavy, for example, Figure 3 , Figure 4 In the orientation shown, the cross section of the guardrail plate 200 in the up-down direction is wavy. In the embodiment of the present application, the guardrail plate 200 is roughly "w"-shaped and wavy. After the wavy guardrail plate 200 is installed on the Z-shaped column 100, in the vertical direction, the guardrail plate 200 is not a plane, but a curved surface with crests and troughs. Therefore, when a vehicle hits the guardrail plate 200, the curved surface on the guardrail plate 200 can also play a role in buffering and absorbing energy for the vehicle. In addition, it should be noted that in the embodiment of the present application, in the vertical direction, the guardrail plate 200 only includes one crest and two troughs, but in other embodiments, more crests and troughs can also be set, and the present application does not limit the number of crests and troughs in the guardrail plate 200.

[0042] like Figure 2 As shown, in the embodiment of the present application, the first plate 110 and / or the second plate 120 are provided with threaded holes, and the threaded holes are used to install the breakable bolts 300. In the embodiment of the present application, the first plate 110 and the second plate 120 can be completely the same in shape and size. Therefore, threaded holes are provided on both the first plate 110 and the second plate 120. During installation, no matter the first plate 110 or the second plate 120 is close to the guardrail plate 200, both can be assembled smoothly.

[0043] like Figure 2 , 3, as shown in FIGS. 4, in the embodiment of the present application, a third side end 112 of the first plate 110 opposite to the first side end 111 is provided with a first corner 113, the first corner 113 faces the third plate 130, and a second corner 114 is provided at the position where the first plate 110 is connected to the third plate 130. The first corner 113 and the second corner 114 are used to snap and fix the nut 340 of the breakable bolt 300;

[0044] A fourth side end 122 of the second plate 120 opposite to the second side end 121 is provided with a third corner 123, the third corner 123 faces the third plate 130, and a fourth corner 124 is provided at the position where the second plate 120 is connected to the third plate 130. The third corner 123 and the fourth corner 124 are used to snap and fix the nut 340 of the breakable bolt 300.

[0045] Among them, in the embodiment of the present application, corners are provided at both side ends of the first plate 110 and both side ends of the second plate 120. For example, in Figure 2 the shown orientation, corners are provided at both the upper and lower sides of the first plate 110 and the second plate 120. Among them, in Figure 2 the shown orientation, the upper end of the first plate 110 is the third side end 112, the lower end is the first side end 111, the lower corner is the first corner 113, the upper corner is the second corner 114, the upper end of the second plate 120 is the second side end 121, the lower end is the fourth side end 122, the upper corner is the third corner 123, and the lower corner is the fourth corner 124. Taking the installation of the guardrail plate 200 on the first plate 110 as an example, during installation, the nut 340 is arranged in the area between the first corner 113 and the second corner 114. The breakable bolt 300 passes through the threaded holes in the guardrail plate 200 and the first plate 110 and extends to the position between the first corner 113 and the second corner 114, and then extends into the nut 340. According to the size of the nut 340, the sizes of the first corner 113 and the second corner 114 are set so that the first corner 113 and the second corner 114 can clamp the nut 340 therein. Therefore, tightening the breakable bolt 300 from the side of the guardrail plate 200 away from the first plate 110 can complete the installation.

[0046] In addition, as Figure 2As shown, the nut 340 is arranged in the area between the first corner 113 and the second corner 114, or in the area between the third corner 123 and the fourth corner 124. In order to ensure that the nut 340 can be clamped in the two areas, the thickness of the nut 340 needs to match the area between the two corners. When the thickness of the nut 340 is large, it is not conducive to setting the nut 340 in the area between the two corners. When the thickness of the nut 340 is small, the strength of the nut 340 is also reduced accordingly. Therefore, in the embodiment of the present application, a reinforcing portion 341 can also be arranged on one side of the nut 340. The reinforcing portion 341 is coaxial with the nut 340. The reinforcing portion 341 and the nut 340 are both provided with holes for the bolt 300 to be screwed, and the outer diameter of the reinforcing portion 341 is smaller than the outer diameter of the nut 340. This arrangement can not only ensure the strength of the nut 340, but also because the outer diameter of the reinforcing portion 341 is smaller than the outer diameter of the nut 340, it will not affect the clamping of the nut 340 in the area between the two corners. In addition, the reinforcement portion 341 may be integrally formed with the nut 340 .

[0047] In the embodiment of the present application, the first plate 110 , the second plate 120 and the third plate 130 may be integrally provided.

[0048] like Figure 4 As shown, in the embodiment of the present application, a protrusion 140 facing the third plate 130 is provided on the first plate 110 and / or the second plate 120, and the protrusion 140 is located between one end of the Z-shaped column 100 for installation on the ground and the screw connection position.

[0049] Among them, Figure 4 As shown, in the embodiment of the present application, the guardrail plate 200 is screwed to the first plate 110. Figure 4 In the orientation shown, the protrusion 140 is located below the screw connection position of the guardrail plate 200. During installation, the nut 340 enters the screw connection position from the upper end and is screwed. When the nut 340 is screwed, it is easy to fall to the ground along the position between the first plate 110 and the third plate 130. The protrusion facing the third plate 130 is provided on the first plate 110, which can play a role in receiving the nut and prevent the nut 340 from falling directly to the ground. It should be noted that if the guardrail plate 200 is screwed only on the first plate 110, the protrusion 140 can be provided only on the first plate 110; if the guardrail plate 200 is screwed only on the second plate 120, the protrusion 140 can be provided only on the second plate 120; if the guardrail plate 200 is screwed on the first plate 110 or the second plate 120, the protrusion 140 can be provided on both the first plate 110 and the second plate 120.

[0050] like Figure 2As shown, in the embodiment of the present application, the distance m1 between the first plate 110 and the second plate 120 can be 90 cm, and the length m2 of the first plate 110 and the second plate 120 can be 50 cm.

[0051] After introducing the guardrail plate 200 and the Z-shaped column 100, the breakable bolt 300 for screwing the guardrail plate 200 and the Z-shaped column 100 will be introduced next.

[0052] As Figure 5 shown, in the embodiment of the present application, the breakable bolt 300 includes a nut 320 and a screw rod 310. The screw rod 310 includes a first section 311 and a second section 314. The first section 311 is connected to the nut 320, and the second section 314 is connected to the first section 311;

[0053] A circular hole 312 is provided inside the first section 311. The circular hole 312 is coaxial with the first section 311. The diameter of the circular hole 312 is the same as the inner diameter of the external threads on the first section 311 and the second section 314. There is a gap between the circular hole 312 and the second section 314, so that in the axial direction of the screw rod 310, an easily breakable part 313 is formed at the gap part of the second section 314 from the position connected to the first section 311 to the circular hole 312.

[0054] Among them, the screw rod 310 can be roughly divided into two sections, a first section 311 and a second section 314. The first section 311 and the second section 314 are coaxial, the outer diameters of the first section 311 and the second section 314 are the same, and external threads are provided on the outer side walls of both, and the major diameters and minor diameters of the external threads are also the same.

[0055] Continue to refer to Figure 5 , a circular hole 312 is provided inside one end of the first section 311 where it is connected to the second section 314. The circular hole 312 is coaxially arranged with the screw rod 310. The diameter of the circular hole 312 is the same as the inner diameter (minor diameter) of the external thread on the screw rod 310. As Figure 5 shown, d1 is the inner diameter of the external threads on the first section 311 and the second section 314, and the diameter of the circular hole 312 is equal to d1.

[0056] In addition, as Figure 5 shown, along the axial direction of the screw rod 310, the circular hole 312 does not extend to the second section 314, that is, there is a solid interval part between the circular hole 312 and the second section 314, and this solid part is the easily breakable part 313.

[0057] In addition, when machining the circular hole 312, a hole can be first opened inward on the outer side wall of the first section 311, and then the circular hole 312 can be machined inside the first section 311 by using the hole.

[0058] As Figure 4, Figure 5 As shown, in the embodiment of the present application, the guardrail plate 200 is installed on the first plate 110. During installation, the screw 310 passes through the threaded holes on the guardrail plate 200 and the first plate 110, and the internal thread of the nut 340 is screwed and matched with the external thread of the screw 310. Thus, the guardrail plate 200 can be fastened to the first plate 110 of the Z-shaped column 100 by using the nut 340. It should be noted that in order to enable the breakable bolt 300 to break when a preset force is applied, so as to release the guardrail plate 200 from the Z-shaped column 100, the nut 340 needs to be fastened to the second section 314 during installation. When the first plate 110 is relatively thin, a gasket can be provided on the first section 311 to ensure that the nut 340 can be fastened to the second section 314.

[0059] When the guardrail plate 200 is impacted by a vehicle, the impact force of the vehicle on the guardrail plate 200 will be transmitted to the nut 340. Since the internal thread of the nut 340 is screwed with the external thread of the second section 314, the impact force can be transmitted from the position where the internal thread of the nut 340 is screwed with the external thread of the second section 314 to the first section 311. As Figure 4 , Figure 6 shown, when the vehicle impacts the guardrail plate 200, assuming the force received by the external thread of the second section 314 is F, F will be transmitted along the axial direction of the second section 314 from the inner diameter position of the external thread of the second section 314 to the breakable part 313. In the Figure 6 orientation shown, the breakable part 313 will receive a vertically downward pulling force from the second section 314. The force application point on the lower surface of the breakable part 313 is the connection position between it and the second section 314, and the force direction is perpendicular to the lower surface of the breakable part 313. The pulling force received by the lower surface of the breakable part 313 will be transmitted to the upper surface of the breakable part 313. Therefore, the force application point on the upper surface of the breakable part 313 is the connection position between it and the inner side wall of the round hole 312, and the force direction is vertically downward. Since the inner side wall of the round hole 312 is set at a right angle to the upper surface of the breakable part 313, the breakable part 313 is likely to break away from the inner side wall of the round hole 312 at the connection position between its upper surface and the inner side wall of the round hole 312.

[0060] For the breakable part 313, when it receives a force away from the nut 320, the force application point on the lower surface of the breakable part 313 is the connection position between it and the second section 314, and the direction is perpendicular to the breakable part 313 downward. The force application point on the upper surface of the breakable part 313 is the connection position between it and the inner side wall of the round hole 312, and the direction is perpendicular to the breakable part 313 downward (parallel to the inner side wall of the round hole 312). Thus, the upper end of the breakable part 313 is likely to fall off from the inner side wall of the round hole 312 at the connection position between its upper surface and the inner side wall of the round hole 312. As Figure 7 shown, Figure 7It is a schematic diagram after the breakable part 313 falls off from the first section 311 under force. When the breakable part 313 falls off from the first section 311, it loses the fastening effect on the Z-shaped column 100 and the guardrail plate 200. The Z-shaped column 100 and the guardrail plate 200 will separate from each other, and then lose the blocking effect on the vehicle, so that the vehicle can drive off the road.

[0061] In addition, it should be noted that when the breakable bolt 300 does not need to achieve the breakable function, the nut 340 can also be fastened on the first section 311. At this time, the breakable bolt 300 can play a fastening role, that is, even if it is subjected to an impact force, it will not break. Therefore, the breakable bolt 300 in the embodiment of the present application can have multiple functions according to different usage scenarios.

[0062] As Figure 5 shown, in the embodiment of the present application, the thickness of the breakable part is 1 ± 0.3 mm, and the inner diameter of the round hole is 11 ± 0.5 mm. As Figure 5 shown, in the embodiment of the present application, the nut and the screw rod are of an integral structure. The nut and the screw rod are both made of Q235B steel. The inner diameters of the round hole and the external thread of the screw rod are both 11 ± 0.5 mm. The thickness d2 of the breakable part is 1 mm ± 0.3 mm. After the axial pull-out verification of the breakable bolt, the breakable bolt 300 can withstand a tensile force of 25 kN, that is, the breakable bolt 300 with this material, size and structure can withstand a maximum traction force of 25 kN at most. When the traction force received is greater than 25 kN, the breakable part will fall off from the first section. Therefore, the breakable bolt 300 with this kind of material, structure and size can not only meet the requirements for fastening the Z-shaped column 100 in the road anti-collision guardrail, but also meet the requirements for the Z-shaped column 100 to fall off on the guardrail plate 200.

[0063] As Figure 5 shown, in the embodiment of the present application, a hole 330 for installation is also provided at one end of the nut 320 away from the screw rod 310. The hole 330 can be an internal hexagonal hole, or an internal triangular hole, or other non-circular holes, so as to facilitate installation using a corresponding wrench.

[0064] In another embodiment, the cross-section of the nut 320 can also be set as an external hexagon or an external triangle, which is convenient for installing with a wrench from the outside of the nut 320.

[0065] As Figure 5 shown, in the embodiment of the present application, the breakable bolt 300 further includes a connecting platform 350. The connecting platform 350 is arranged between the nut 320 and the screw rod 310, and the outer diameter of the connecting platform 350 is greater than the outer diameter of the screw rod 310. As Figure 5As shown, the connecting platform 350 is located between the nut 320 and the screw rod 310. The connecting platform 350 is cylindrical, coaxial with the screw rod 310 and has an outer diameter larger than that of the screw rod 310. During installation, the breakable bolt 300 passes through the corresponding threaded hole and is screwed with the nut 340. When the threaded hole is too large, the screw rod 310 is likely to shake within the threaded hole. In the embodiment of the present application, by providing the connecting platform 350 with a diameter larger than that of the screw rod 310, when facing a threaded hole with a larger diameter, the connecting platform 350 can play a certain fastening role and prevent the screw rod 310 from shaking within the threaded hole. In addition, it should be noted that when setting the connecting platform 350, the connecting platform 350 can be integrally provided with the nut 320 and the screw rod 310, and its material can also be steel of model Q235B.

[0066] As Figure 5 shown, in the embodiment of the present application, anti-corrosion coatings are provided on the outer surfaces of the nut 320, the connecting platform 350, and the screw rod 310. Among them, the anti-corrosion coating can be a galvanized or chrome-plated coating. Setting the anti-corrosion coating can increase the service life of the breakable bolt 300.

[0067] In the embodiment of the present application, the structures of the Z-shaped column 100 and the guardrail plate 200 can each play a role in buffering and energy absorption alone. In addition, by providing the breakable bolt 300, it can also play a buffering role. Therefore, the Z-shaped column 100, the guardrail plate 200, and the breakable bolt 300 of the anti-collision guardrail including the Z-shaped column in the present application can all play a role in buffering and energy absorption, and the buffering effect is good.

[0068] Finally, it should be noted that the above embodiments are only specific implementation manners of the present application, used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A crash barrier comprising a Z-shaped column, characterized in that: include: A Z-shaped column, wherein the Z-shaped column comprises a first plate, a second plate and a third plate, wherein the plate surfaces of the first plate and the second plate are arranged opposite to each other, the third plate is arranged between the first plate and the second plate, and both side ends of the third plate are respectively connected to the first side end of the first plate and the second side end of the second plate; wherein the extension direction of the first plate to its first side end is opposite to the extension direction of the second plate to its second side end; A guardrail plate, wherein the cross section of the guardrail plate is wavy; A breakable bolt, wherein the guardrail plate is screwed to the first plate or the second plate through the breakable bolt, and the screw rod of the breakable bolt is used to break when subjected to a force of a preset magnitude, so as to release the guardrail plate from the Z-shaped column.

2. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 1, characterized in that: The first plate and / or the second plate are provided with threaded holes, and the threaded holes are used to install the breakable bolts.

3. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 2, characterized in that: A first corner is provided at a third side end of the first plate opposite to the first side end, the first corner faces the third plate, a second corner is provided at a position where the first plate is connected to the third plate, and the first corner and the second corner are used for clamping nuts that fix the breakable bolts; A third corner is provided at the fourth side end of the second plate opposite to the second side end, and the third corner faces the third plate. A fourth corner is provided at the position where the second plate is connected to the third plate, and the third corner and the fourth corner are used for clamping and fixing nuts of the breakable bolts.

4. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 3, characterized in that: The distance between the first plate and the second plate is 90 cm, and the length of the first plate and the second plate is 50 cm.

5. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 1, characterized in that: The first plate, the second plate and the third plate are integrally provided.

6. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 1, characterized in that: The first plate and / or the second plate is provided with a protrusion toward the third plate, the protrusion is close to the screw connection position between the guardrail plate and the Z-shaped column, and the protrusion is located between one end of the Z-shaped column for installation on the ground and the screw connection position.

7. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 1, characterized in that: The breakable bolt comprises a nut and a screw rod, the screw rod comprises a first section and a second section, the first section is connected to the nut, and the second section is connected to the first section; A circular hole is provided inside the first section, the circular hole is coaxial with the first section, the diameter of the circular hole is the same as the inner diameter of the external threads on the first section and the second section, and there is a gap between the circular hole and the second section so that in the axial direction of the screw, the second section forms a breakable portion from the position where it is connected to the first section to the gap between the circular hole.

8. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 7, characterized in that: The thickness of the easily breakable portion is 1±0.3 mm, and the inner diameter of the circular hole is 11±0.5 mm.

9. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 7, characterized in that: The breakable bolt further includes a connecting platform, which is arranged between the nut and the screw rod, and the outer diameter of the connecting platform is greater than the outer diameter of the screw rod.

10. The anti-collision guardrail comprising a Z-shaped column as claimed in claim 9, characterized in that: The nut, the connecting platform and the screw rod are an integrated structure; The nut is provided with an inner hexagonal hole or an inner triangular hole at one end away from the screw rod; The cross section of the nut is an external hexagon or an external triangle.

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