A square column tightener for anti-collision guardrail

Abstract

The present invention discloses a square column tensioner for anti-collision guardrail, which belongs to the technical field of safety protection guardrails; it solves the problem that the existing square column anti-collision guardrail has a complex structure and a long installation and maintenance cycle, which affects the road traffic time. The tensioner of the present invention includes an upper tensioner and a lower tensioner; the upper tensioner and the lower tensioner are both hollow structures, and the internal cavities of both are square column accommodating cavities; the lower tensioner is pre-buried in the civil engineering ground, the square column is arranged in the square column accommodating cavity of the lower tensioner, the upper tensioner is located above the lower tensioner and is sleeved on the square column, and the upper tensioner is used to clamp the square column in the lower tensioner; the upper tensioner and the lower tensioner are detachably connected. The tensioner of the present invention is not only simple in structure, but also simple in installation process. During the ground construction, the lower tensioner can be installed on the ground as an embedded part, and the upper tensioner and the column can be installed after the ground maintenance is completed, which can shorten the construction period.

Description

Technical Field

[0001] The invention relates to the technical field of safety protection guardrails, and in particular to a square column tightener for anti-collision guardrails. Background Art

[0002] Anti-collision guardrail columns are usually round columns, but with the overall increase in vehicle load and vehicle speed, high-protection grade anti-collision guardrails are gradually being used in municipal roads, and the proportion is gradually increasing. At the same time, with the increasing demand for indoor test tracks and indoor road tests, higher and higher requirements are also being put forward for the safety and convenience of quick replacement of anti-collision guardrails.

[0003] The column type of high-grade anti-collision guardrail is usually a square structure. In order to realize the fixation and quick maintenance functions of the square column, a square tightener needs to be designed to fix the square column.

[0004] In the prior art, the square columns of the anti-collision guardrail cannot be quickly installed and replaced. When the anti-collision guardrail is damaged by collision, the removal of the square columns is more complicated. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a square column tensioner for anti-collision guardrail, so as to solve the problems of long installation and maintenance cycle, complicated installation steps and affected road traffic time of existing square column anti-collision guardrail.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] The present invention provides a square column tensioner for a collision-proof guardrail, which comprises an upper tensioner and a lower tensioner; both the upper tensioner and the lower tensioner are hollow structures, and the internal cavities of both are square column accommodating cavities;

[0008] The lower tensioner is pre-buried in the civil engineering ground or fixed by a transfer block, the square column is arranged in the square column accommodating cavity of the lower tensioner, the upper tensioner is located above the lower tensioner and sleeved on the square column, and the upper tensioner is used to clamp the square column in the lower tensioner; the upper tensioner and the lower tensioner are detachably connected.

[0009] In a possible design, the upper tensioner is a U-shaped square frame; a plurality of tensioning blocks are provided on the bottom surface of the upper tensioner along its circumferential direction; the inner surface of the tensioning block matches the outer surface of the square column; the outer surface of the tensioning block matches the inner surface of the lower tensioner; the tensioning block is used to clamp the square column in the lower tensioner.

[0010] In a possible design, the lower tensioner includes a connecting section, a transition section and a fixing section from top to bottom;

[0011] The connecting section is a U-shaped square frame, the transition section is a hollow quadrangular pyramid structure; the fixed section is a hollow quadrangular column structure; the cavities of the three are connected to form a square column accommodating cavity.

[0012] In a possible design, the inner surfaces of the connecting section and the transition section match the outer surface of the clamping block; and the inner surface of the hollow quadrangular prism structure matches the outer surface of the square column.

[0013] In a possible design, both the transition section and the fixed section are pre-buried in the civil engineering ground.

[0014] In a possible design, the upper tightener is provided with a first bolt hole; the connecting section of the lower tightener is provided with a second bolt hole; the number of the first bolt holes and the second bolt holes are equal and their positions correspond;

[0015] The connecting bolt passes through the first bolt hole and the second bolt hole in sequence from top to bottom, and a connecting nut is arranged on one end of the connecting bolt located at the lower tightener.

[0016] In a possible design, a washer is provided on the connecting bolt, and the washer is located on the inner side of the connecting nut.

[0017] In a possible design, eight clamping blocks with the same structure are provided on the bottom surface of the upper clamping device along its circumferential direction;

[0018] The inner surface of the clamping block is a vertical plane for cooperating with the square column; the outer surface of the clamping block is an inclined surface inclined inwardly, and the inner surfaces of the connecting section and the transition section are also inclined surfaces, which are used to cooperate with the outer surface of the clamping block.

[0019] In a possible design, the number of the first bolt holes is four, and the first bolt holes are distributed at four corners of the upper tightener;

[0020] The number of the second bolt holes is also four, and the second bolt holes are distributed at the four corners of the connecting section.

[0021] In a possible design, the outer surface of the clamping block is provided with a local thinning structure.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] (1) The square column tensioner of the anti-collision guardrail of the present invention has a simple structure and is easy to remove and install. When the connecting bolts are loosened, the anti-collision guardrail can be quickly removed. When the anti-collision guardrail collides with a vehicle, the connecting bolts can be loosened for rapid maintenance, and the repair and replacement of the anti-collision guardrail can be completed quickly. At the same time, when the connecting bolts are not completely locked, the square column of the anti-collision guardrail can move freely in the upper and lower tensioners, which is convenient for adjusting the height of the square column.

[0024] (2) The present invention arranges a plurality of clamping blocks at the lower part of the upper clamping device, so that each side surface of the square column can contact the inner surface of the clamping block. Therefore, the design can increase the contact area between the clamping block and the square column, thereby increasing the connection strength between the square column and the upper clamping device, and finally clamping the square column.

[0025] (3) The square column tensioner of the anti-collision guardrail is easy to install. During the ground construction, the lower tensioner can be installed on the ground as an embedded part. After the ground maintenance is completed, the upper tensioner and column can be installed, shortening the construction period.

[0026] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0028] Figure 1 This is a schematic diagram of the structure of the square column tightener of the anti-collision guardrail of the present invention;

[0029] Figure 2 It is a side view of the square column tightening device structure of the anti-collision guardrail of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the upper tightener of the present invention;

[0031] Figure 4 It is a side view of the upper tightener structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the lower tightener of the present invention;

[0033] Figure 6 It is a cross-sectional view of the lower tightener structure of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the adapter block of the present invention.

[0035] Reference numerals:

[0036] 1-upper tensioner; 2-lower tensioner; 3-connecting bolt; 4-gasket; 5-connecting nut; 6-first bolt hole; 7-second bolt hole; 8-connecting section; 9-transition section; 10-fixed section; 11-transition arc section; 12-tensioning block; 13-adapter block; 14-upper mounting surface; 15-lower mounting surface, 16-compression spring; 17-metal support column; 18-shock-absorbing column; 19-middle support seat; 20-weight reduction hole. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0038] The present invention provides a square column tightener for anti-collision guardrails, such as Figure 1 and Figure 2 As shown, the square column tensioner of the anti-collision guardrail includes an upper tensioner 1 and a lower tensioner 2; the upper tensioner 1 and the lower tensioner 2 are both hollow structures, and the internal cavities of both are square column accommodating cavities; the lower tensioner 2 is pre-buried in the civil engineering ground as a whole or fixed by a transfer block, the square column is arranged in the square column accommodating cavity of the lower tensioner 2, the upper tensioner 1 is located above the lower tensioner 2 and is sleeved on the square column, and the upper tensioner 1 is used to clamp the square column in the lower tensioner 2; the upper tensioner 1 and the lower tensioner 2 are detachably connected.

[0039] Specifically, the square column (square column for short) tensioner of the anti-collision guardrail of the present invention adopts a split design, and the tensioner includes an upper tensioner 1 and a lower tensioner 2; wherein, the upper tensioner 1 is arranged directly above the lower tensioner 2, and the two can be detachably connected after being aligned, and the upper tensioner 1 and the lower tensioner 2 are both hollow structures, and both have square column accommodating cavities inside. During installation, the lower tensioner 2 is first pre-buried as a whole in the civil engineering ground, and only the installation hole is reserved on the ground; then, the square column is placed in the cavity in the lower tensioner 2; finally, the upper tensioner 1 is installed, and the square column is clamped in the lower tensioner 2 by the upper tensioner 1 to achieve the fixation of the square column; the upper tensioner 1 and the lower tensioner 2 are designed to be detachably connected, so as to facilitate the replacement and installation of new square columns.

[0040] Compared with the prior art, the present invention adopts a split structure of an upper tensioner 1 and a lower tensioner 2, which has the following effects: (1) Convenient disassembly: The present invention uses an upper tensioner 1 to clamp the square column. Since the upper tensioner 1 and the lower tensioner 2 are detachably connected, it is convenient to disassemble the square column. (2) Convenient installation: The present invention designs the tensioner to be split, and the lower tensioner 2 can be installed together with the civil engineering as an embedded part. After completion, the upper tensioner and the lower tensioner 2 can be detachably connected. (3) Convenient maintenance: Since the lower tensioner 2 of the present invention is embedded in the civil engineering ground as an embedded part, and the upper tensioner 1 can clamp the square column, after the anti-collision guardrail is damaged, only the square column needs to be replaced, without replacing the upper tensioner 1 and the lower tensioner 2. (4) Convenient replacement: Replace and adjust the square columns of different heights according to the actual terrain and protection conditions.

[0041] In order to clamp the square columns to increase the overall stability of the anti-collision guardrail, such as Figure 3 and Figure 4 As shown, the upper tightener 1 of the present invention is a U-shaped square frame; a plurality of tightening blocks 12 are provided on the bottom surface of the upper tightener 1 along its circumferential direction; the inner surface of the tightening block 12 matches the square column; the outer surface of the tightening block 12 matches the inner surface of the lower tightener 2; the tightening block 12 is used to clamp the square column in the lower tightener 2.

[0042] Specifically, a plurality of clamping blocks 12 are provided on the bottom surface of the upper clamping device 1, and the setting direction of the clamping blocks 12 is the same as the height direction of the square column; the inner surface of the clamping block 12 is flush with the inner surface of the upper clamping device 1, that is, the inner surface of the Hui-shaped square frame. After the square column is inserted into the cavity of the lower clamping device 2, there is a certain gap between the upper end portion of the lower clamping device 2 and the square column. At this time, the upper clamping device 1 is sleeved on the square column and the clamping block 12 of the upper clamping device 1 is inserted into the gap between the square column and the lower clamping device 2 like a wedge, and the square column is clamped by the clamping block 12. Since the inner surface of the clamping block 12 matches the outer surface of the square column, and the outer surface of the clamping block 12 matches the inner surface of the lower clamping device 2, the clamping block 12 can clamp the square column; after the square column is completely clamped, the upper clamping device 1 and the lower clamping device 2 are detachably connected to achieve a firm fixation of the square column of the anti-collision guardrail.

[0043] Compared with the prior art, the present invention arranges a plurality of clamping blocks 12 at the lower part of the upper clamping device 1, so that each side surface of the square column can contact the inner surface of the clamping block 12. Therefore, the design can increase the contact area between the clamping block 12 and the square column, thereby increasing the connection strength between the square column and the upper clamping device 1, and finally clamping the square column.

[0044] It should be noted that if Figure 5 and Figure 6As shown, the lower tightener 2 of the present invention includes a connecting section 8, a transition section 9 and a fixed section 10 from top to bottom; wherein the structure of the connecting section 8 is a U-shaped square frame, the transition section 9 is a hollow quadrangular pyramid structure; the fixed section 10 is a hollow quadrangular column structure; the cavities of the three are connected and form a square column accommodating cavity; the inner surfaces of the connecting section 8 and the transition section 9 match the outer surfaces of the corresponding tightening blocks 12; the inner surface of the hollow quadrangular column structure matches the outer surface of the square column.

[0045] Specifically, the structure of the connecting section 8 of the lower tightener 2 of the present invention is a U-shaped square frame, which is set to match the structure of the U-shaped square frame of the upper tightener 1, so that the two can be connected by bolts. The transition section 9 of the lower tightener 2 is set as a hollow quadrangular pyramid structure, which is to strengthen the local stiffness of the lower tightener 2. This is because the lower tightener 2 and the upper tightener 1 are in inclined contact. In order to ensure the corresponding stiffness of the contact position, a corresponding inclined shape is set on the outer side of the transition section 9 of the lower tightener 2, which can ensure the overall stiffness of the lower tightener 2.

[0046] It should be pointed out that the transition section 9 and the fixing section 10 of the lower tightener 2 of the present invention are both pre-buried in the civil engineering ground.

[0047] Compared with the prior art, the present invention embeds the transition section 9 and the fixing section 10 of the lower tensioner 2 in the civil engineering ground, realizes the fixing and clamping function of the square column in the lower tensioner 2 through the upper tensioner 1, and ensures that the upper tensioner 1 and the lower tensioner 2 are relatively fixed by locking, so as to prevent the square column from being pulled out of the lower tensioner 2. After the square column is relatively fixed with the upper and lower tensioners 2, the square column can be firmly connected to the ground.

[0048] In order to prevent the square column from being pulled out of the upper and lower tensioners 2, the upper tensioner 1 of the present invention is provided with a first bolt hole 6; the connecting section 8 of the lower tensioner 2 is provided with a second bolt hole 7; the number of the first bolt holes 6 and the second bolt holes 7 are equal and the positions correspond; the connecting bolt 3 passes through the first bolt hole 6 and the second bolt hole 7 in sequence from top to bottom, and a connecting nut 5 is provided on one end of the connecting bolt 3 located on the lower tensioner 2.

[0049] Specifically, the upper tensioner 1 and the lower tensioner 2 are locked by the connecting bolt 3 to ensure that the upper tensioner 1 and the lower tensioner 2 are relatively fixed, so as to prevent the square column from being pulled out of the lower tensioner 2. In addition, by providing the connecting bolt 3, the installation and disassembly of the square column is facilitated. When the connecting bolt 3 is loosened, the anti-collision guardrail can be quickly removed. When the anti-collision guardrail collides with a vehicle, the connecting bolt 3 can be loosened for rapid maintenance, and the repair and replacement of the anti-collision guardrail can be completed quickly. At the same time, when the connecting bolt 3 is not completely locked, the square column of the anti-collision guardrail can move freely in the upper and lower tensioners 2, so that the height of the square column can be adjusted conveniently.

[0050] It should be noted that a gasket 4 is provided on the connecting bolt 3, and the gasket 4 is located on the inner side of the connecting nut 5. The gasket 4 can effectively fill the gap between the connecting bolt 3 and the connecting nut 5 to ensure a tighter connection.

[0051] In order to clamp the square pillars of the anti-collision guardrail and ensure their centering, eight clamping blocks 12 with the same structure are provided on the bottom surface of the upper clamping device 1 of the present invention along its circumferential direction; the inner surface of the clamping block 12 is a vertical plane, which is used to cooperate with the side surface of the square pillar; the outer surface of the clamping block 12 is an inclined surface inclined inwardly, and the inner surfaces of the connecting section 8 and the transition section 9 are also inclined surfaces inclined inwardly, and the inner surfaces of the connecting section 8 and the transition section 9 are used to cooperate with the outer surface of the clamping block 12.

[0052] Specifically, eight clamping blocks 12 are evenly arranged on the lower part of the upper clamping device 1 of the present invention, that is, each side surface of the square column of the anti-collision guardrail is in contact with the inner surfaces of the two clamping blocks 12, and the inner surface of the clamping block 12 is a vertical plane, which is used to cooperate and contact with the side surfaces of the square column of the anti-collision guardrail, and the outer surface of the clamping block 12 is an inclined surface inclined inwardly, which cooperates with the connecting section 8 and the transition section 9 of the lower clamping device 2. Through the cooperation of the inclined surfaces between the upper clamping device 1 and the lower clamping device 2, it can be ensured that the upper clamping device 1 can achieve the centering of the square column during the installation process, avoiding the failure of the local setting of the clamping block 12 to clamp the square column of the anti-collision guardrail.

[0053] It should also be noted that the present invention makes the outer surface of the clamping block 12 contact the inclined surfaces of the connecting section 8 and the transition section 9 of the lower clamping device 2, which can not only center and align the square column and apply clamping force to the square column, but also facilitates the replacement of square columns of different models.

[0054] It should be pointed out that the clamping block 12 of the present invention is provided with a local thinning structure on the outside, and the local thinning structure can improve the flexibility of the clamping block 12 and further increase the deformation capacity of the clamping block 12 .

[0055] It should be emphasized that a transition arc segment 11 is provided on the outer surface of the clamping block 12 . The transition arc segment 11 is adjacent to the bottom surface of the upper clamping device 1 . The transition arc segment 11 is used to prevent local stress concentration and damage of the structure.

[0056] In order to further improve the stability of the square column, the number of the first bolt holes 6 of the present invention is four, and the first bolt holes 6 are distributed at the four corners of the upper tightener 1; the number of the second bolt holes 7 is also four, and the second bolt holes 7 are distributed at the four corners of the connecting section 8.

[0057] Specifically, since the upper tensioner 1 is a U-shaped square frame, the connecting section 8 of the lower tensioner 2 is also a U-shaped square frame, and the two U-shaped square frames have the same shape and equal size; the upper and lower mounting surfaces of the first bolt hole 6 are both square, and similarly, the upper and lower mounting surfaces of the second bolt hole 7 are also square. Four bolt holes are correspondingly provided at the four corner positions of the two U-shaped square frames, and the four first bolt holes 6 of the upper tensioner 1 correspond to the positions of the four second bolt holes 7 of the lower tensioner 2; the bolts pass through the first bolt hole 6 and the second bolt hole 7 from top to bottom in sequence and are fixed by the connecting nut 5.

[0058] Compared with the prior art, the present invention sets bolt holes at the four corner positions of the upper tensioner 1 and the lower tensioner 2 and adopts bolt connection, so that the square column can be locked by tightening the connecting bolts 3; the square column can also be moved up and down by loosening the connecting bolts 3 to adjust the height of the square column; different square columns can also be replaced according to different terrains and different impact conditions.

[0059] In summary, the square column tensioner of the anti-collision guardrail of the present invention is easy to install. During ground construction, the lower tensioner 2 can be installed on the ground as an embedded part, and the upper tensioner 1 and the column can be installed after the ground maintenance is completed, shortening the construction period.

[0060] Example 1

[0061] The present embodiment also provides an adapter block 13, the upper mounting surface 14 and the lower mounting surface 15 of the adapter block 13 are both square surfaces; the adapter block is connected to the ground embedded structure and is located in the ground (only the upper mounting surface is left on the ground, and the other parts of the structure are located under the ground), and the lower tightener 2 is fixed by the adapter block 13 in the ground; the fixed section 10 of the lower tightener 2 is fixed at the center of the adapter block and is located in the fixed block.

[0062] like Figure 7 As shown, the adapter block 13 of the present embodiment includes an upper mounting surface 14, a lower mounting surface 15 and a plurality of groups of adapter block shock-absorbing components arranged therebetween; the upper mounting surface 14 and the lower mounting surface 15 are arranged in parallel up and down; the plurality of groups of adapter block shock-absorbing components each include an upper spring mounting seat, a lower spring mounting seat, a metal support column 17 and a shock-absorbing column 18; upper spring mounting seats are provided at the four corners of the bottom surface of the upper mounting surface 14, lower spring mounting seats are provided at the four corners of the top surface of the lower mounting surface 15, a compression spring 16 is provided between the upper spring mounting seat and the lower spring mounting seat, and the metal support column 17 is provided inside the compression spring 16.

[0063] Specifically, the number of shock-absorbing assemblies of the adapter block 13 of the present invention is four groups, and the four groups of shock-absorbing assemblies of the adapter block 13 are distributed at the four corners of the rectangular adapter block 13; that is, upper spring mounting seats are provided at the four corners of the bottom surface of the upper mounting surface 14, and lower spring mounting seats are provided at the four corners of the top surface of the lower mounting surface 15. A compression spring 16 is provided between the upper spring mounting seat and the lower spring mounting seat, and the upper spring mounting seat and the lower spring mounting seat at corresponding positions are respectively used to fix the two ends of the compression spring 16, and the metal support column 17 is used to support and guide the compression spring 16.

[0064] Compared with the prior art, the present invention can increase the shock absorbing function of the adapter block 13 by arranging multiple sets of adapter block shock absorbing components between the upper mounting surface 14 and the lower mounting surface 15, thereby reducing the energy of the vehicle when the crash barrier is hit.

[0065] It should be noted that the metal support column 17 of the present invention includes a metal sleeve and a central axis; wherein the central axis is disposed in the metal sleeve, the top surface of the metal axis is fixedly connected to the upper mounting surface 14 , and the bottom surface of the metal sleeve is fixedly connected to the lower mounting surface 15 .

[0066] Compared with the prior art, the present invention can guide the compression spring 16 to move along the axial direction of the metal support column by providing a metal sleeve and a central axis, thereby reducing its swing and deviation and improving its working accuracy and stability.

[0067] In order to further enhance the shock-absorbing function of the adapter block 13 , a middle support seat 19 is further provided between the upper mounting surface 14 and the lower mounting surface 15 of the present invention; the middle support seat 19 has the same structure as the above-mentioned metal support column 17 .

[0068] In order to reduce the weight of the adapter block 13 , a plurality of weight-reducing holes 20 are evenly distributed along the axial direction of the middle support seat 19 of the present invention.

[0069] In order to further enhance the shock-absorbing function of the adapter block 13, a plurality of shock-absorbing columns 18 are provided between the upper mounting surface 14 and the lower mounting surface 15 of the adapter block 13 of the present invention; the shock-absorbing columns 18 are provided around the fixing section 10 of the lower tensioner 2, and the material of the shock-absorbing columns 18 includes rubber material.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A square column tightener for anti-collision guardrail, characterized in that: It includes an upper tightener and a lower tightener; both the upper tightener and the lower tightener are hollow structures, and the internal cavities of both are square column accommodating cavities; The lower tensioner is pre-buried in the civil engineering ground or fixed by a transfer block, the square column is arranged in the square column accommodating cavity of the lower tensioner, the upper tensioner is located above the lower tensioner and is sleeved on the square column, and the upper tensioner is used to clamp the square column in the lower tensioner; the upper tensioner and the lower tensioner are detachably connected.

2. The square column tightener of the anti-collision guardrail according to claim 1 is characterized in that: The upper tensioner is a U-shaped square frame; a plurality of tensioning blocks are arranged on the bottom surface of the upper tensioner along its circumferential direction; the inner surface of the tensioning block matches the outer surface of the square column; the outer surface of the tensioning block matches the inner surface of the lower tensioner; the tensioning block is used to clamp the square column in the lower tensioner.

3. The square column tightener of the anti-collision guardrail according to claim 2 is characterized in that: The lower tightener includes a connecting section, a transition section and a fixing section from top to bottom; The connecting section is a U-shaped square frame, the transition section is a hollow quadrangular pyramid structure; the fixed section is a hollow quadrangular column structure; the cavities of the three are connected to form a square column accommodating cavity.

4. The square column tightener of the anti-collision guardrail according to claim 3 is characterized in that: The inner surfaces of the connecting section and the transition section match the outer surface of the clamping block; the inner surface of the hollow quadrangular prism structure matches the outer surface of the square column.

5. The square column tightener of the anti-collision guardrail according to claim 4 is characterized in that: The transition section and the fixed section are both pre-buried in the civil construction ground.

6. The square column tightener of the anti-collision guardrail according to claim 5, characterized in that: The upper tightener is provided with a first bolt hole; the connecting section of the lower tightener is provided with a second bolt hole; the first bolt holes and the second bolt holes are equal in number and corresponding in position; The connecting bolt passes through the first bolt hole and the second bolt hole in sequence from top to bottom, and a connecting nut is provided on one end of the connecting bolt located on the lower tightener.

7. The square column tightener of the anti-collision guardrail according to claim 6, characterized in that: A gasket is provided on the connecting bolt, and the gasket is located on the inner side of the connecting nut.

8. The square column tightener of the anti-collision guardrail according to claim 7, characterized in that: A total of eight tightening blocks with the same structure are arranged on the bottom surface of the upper tightener along its circumferential direction; The inner surface of the clamping block is a vertical plane for cooperating with the square column; the outer surface of the clamping block is an inclined surface inclined inwardly, and the inner surfaces of the connecting section and the transition section are also inclined surfaces, and the inner surfaces of the connecting section and the transition section are used to cooperate with the outer surface of the clamping block.

9. The square column tightener of the anti-collision guardrail according to claim 8, characterized in that: The number of the first bolt holes is four, and the first bolt holes are distributed at four corners of the upper tightener; The number of the second bolt holes is also four, and the second bolt holes are distributed at four corners of the connecting section.

10. The square column tightener of the anti-collision guardrail according to any one of claims 2 to 9, characterized in that: The outer surface of the clamping block is provided with a local thinning structure.

Images