Driving-in device for highway stainless steel guardrail stand column

Abstract

The invention relates to a driving-in device for a highway stainless steel guardrail stand column, and belongs to the technical field of highway guardrail driving-in type steel stand column installation. Comprising a column head, a vertical lead screw is in threaded connection with the interior of the column head, an expansion plug is fixedly arranged at the lower end of the lead screw, the expansion plug is of an inverted-circular-truncated-cone-shaped structure with the thick upper portion and the thin lower portion, and four friction plates are arranged on the periphery of the expansion plug and located on the inner side of an opening in the upper end of a stand column. An acting plate is fixedly arranged in the middle of the arc face of the inner side of the friction plate, a connecting rod is rotationally arranged in the middle of the upper end of each acting plate, the upper end of each connecting rod is hinged to the corresponding column head, and an acting slope is arranged at the upper end of the edge of the side, away from the friction plate, of each acting plate. The acting inclined surface on the acting plate of the friction plate is attached to the outer side conical surface of the expansion plug; the problem that an existing guardrail stand column is prone to being structurally damaged in the driving process is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of installation of driven steel upright posts for highway guardrails, and in particular relates to a driving device for driving upright posts of stainless steel highway guardrails. Background Art

[0002] During the construction of driven steel columns for highway guardrails, a significant technical challenge is that the upper end of the column directly bears the powerful hammer force of the pile driver. Especially in the case of relatively hard geological conditions, this direct impact force often causes the upper part of the column to present a "mushroom head" shape after the construction is completed. This abnormal shape not only seriously hinders the precise installation of the subsequent column cap or upper column, but also makes it easy for external impurities such as rain, snow, and dust to enter the interior of the column, thereby weakening its internal anti-corrosion performance. In the long run, it will endanger the stability and durability of the entire guardrail system.

[0003] With the continuous progress of the steel industry, high-strength steel is gradually becoming the new favorite in the field of traffic safety facilities due to its excellent mechanical properties and economy. In order to optimize construction costs and reduce resource consumption, the wall thickness design of the column tends to be lightweight, that is, the wall thickness of the column is reduced as much as possible while meeting the use requirements. However, this design trend also brings new challenges: although the strength of high-strength steel has been significantly improved, its Young's modulus (that is, the ability of the material to resist elastic deformation) has not been significantly improved accordingly. Therefore, during the construction of the column, the lightweight design of the column is more prone to local stability damage, especially when subjected to high-intensity hammering, its ability to resist deformation is relatively weak.

[0004] During the construction of driven steel columns for highway guardrails, the columns need to undergo multiple high-intensity hammering, which is a severe test for the quality of materials and welds. Specifically, repeated hammering force significantly increases the risk of cracking in the weld area. As a key link connecting the various components of the column, the integrity of the weld is directly related to the stability and safety of the entire guardrail structure. If cracked welds or damaged materials are not replaced or repaired in time, the overall protection level of the guardrail will be directly reduced.

[0005] In view of the above problems, it is particularly urgent to implement effective protection measures for the upper part of the driven steel columns of highway guardrails during the driving process. This is not only to prevent the occurrence of "mushroom heads" or material cracking, but also to ensure the structural integrity of the columns during installation and use, thereby ensuring the long-term stable operation of the entire guardrail system. Therefore, developing an efficient and reliable construction protection solution for driven steel columns of highway guardrails has become a key technical problem that needs to be solved in the current field of traffic safety engineering. Summary of the invention

[0006] The invention overcomes the shortcomings of the prior art and provides a driving device for highway stainless steel guardrail posts, thereby solving the problem that the guardrail posts are easily structurally damaged during the driving process.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0008] A driving device for highway stainless steel guardrail posts, including a post head, a vertical screw rod screwed inside the post head, a plug fixedly arranged at the lower end of the screw rod, the plug being an inverted truncated cone structure thick at the top and thin at the bottom, four friction plates arranged around the plug, the four friction plates are located inside the upper end opening of the post, an action plate is fixedly arranged in the middle of the inner arc surface of the friction plate, a connecting rod is rotatably arranged in the middle of the upper end of each action plate, the upper end of the connecting rod is hinged to the post head, an action inclined surface is arranged at the upper end of the edge of the action plate away from the friction plate, and the action inclined surface on the action plate of the friction plate is kept in contact with the outer conical surface of the plug.

[0009] Furthermore, the column head is a vertically arranged variable diameter cylindrical structure, including a small diameter section on the upper side and a large diameter section on the lower side. An upper action groove is arranged at the center of the upper end surface of the small diameter section, and a lower action groove is arranged at the center of the lower end surface of the large diameter section. A partition is arranged between the upper action groove and the lower action groove, and an internal threaded hole penetrating from top to bottom is arranged at the center of the partition; the screw rod is threadedly connected to the inside of the internal threaded hole; the upper end of the connecting rod is hinged to the inner top surface of the lower action groove.

[0010] Furthermore, a hexagonal hole is arranged on the upper end surface of the screw rod.

[0011] Furthermore, the upper end opening of the column is sleeved inside the lower side action groove of the column head.

[0012] Furthermore, the friction plate is an arc-shaped plate structure, the axis of the friction plate is vertically arranged, and the outer arc surface of the friction plate is in contact with the inner side surface of the upper end opening of the column.

[0013] Furthermore, the action plate is a vertically arranged square plate-shaped structure, the action plate is perpendicular to the inner arc surface of the friction plate, and the axis of the screw rod is located in the plane where the action plate is located.

[0014] Furthermore, the inclination of the action slope on the action plate of the friction plate is consistent with the inclination of the outer conical surface of the expansion plug.

[0015] Furthermore, two symmetrical semi-cylindrical hoops are provided on the outer side of the upper opening of the column, and the two hoops are both in contact with the outer side of the column; two upper and lower groups of bolt holes are provided on the side wall of the column, and two upper and lower bolt holes are also provided on each hoop. The fixing bolts pass through the bolt holes on the two hoops and the bolt holes on the column in turn and are screwed with fixing nuts, thereby fixing the two hoops to the outer side of the column.

[0016] Furthermore, a semicircular reinforcing ring is fixedly arranged on the outer side surface of the hoop near the upper end, and a half circle of square clamping blocks are equidistantly arranged on the upper end surface of the reinforcing ring.

[0017] Furthermore, a circle of square clamping grooves is provided at the lower end opening of the lower side action groove of the column head; the upper end openings of the two spliced ​​hoops are inserted into the lower end openings of the lower side action groove of the column head, the upper end surface of the reinforcing ring on the outer side of the hoop contacts the lower end surface of the column head, and the clamping blocks on the hoop are respectively clamped into a circle of clamping grooves inside the lower side action groove of the column head.

[0018] The beneficial effects of the present invention compared with the prior art are as follows: 1. Compared with directly hammering the column with a pile driver, the driving device for highway stainless steel guardrail columns provided by the present invention can effectively prevent the upper end surface of the column from having a "mushroom head" shape after construction, ensure the smooth installation of the column cap and the upper column, and alleviate the anti-corrosion problem inside the column.

[0019] 2. For high-strength steel columns, a driving device with an outer hoop and inner support structure is used for construction. It can convert the vertical hammer force acting on the upper end face of the column into a vertical friction force along the side wall of the column, improve the local stability of the column during the driving process, and ensure the smooth installation of the column under complex geological conditions.

[0020] 3. The driving device with an outer hoop and inner support structure is used to provide support force and hoop effect, thereby reducing the deformation of the column head during the driving process and avoiding material or weld cracking under repeated hammering. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a three-dimensional schematic diagram of the present invention as a whole; Figure 2 It is a front view of the present invention as a whole; Figure 3 It is a cross-sectional view of the front of the present invention; Figure 4 It is a partial schematic diagram after cutting of the present invention; Figure 5 It is a three-dimensional representation of the capital Figure 1 ; Figure 6 It is a three-dimensional representation of the capital Figure 2 ; Figure 7 It is a schematic diagram of the connection between the expansion plug and the four friction plates; Figure 8 It is a schematic diagram of the connection between the expansion plug and a friction plate; Fig. 9 It is a three-dimensional schematic diagram of the friction plate; Fig.10 It is a three-dimensional schematic diagram of the hoop; Among them, 1 is the column head, 2 is the small diameter section, 3 is the large diameter section, 4 is the upper side action groove, 5 is the lower side action groove, 6 is the internal threaded hole, 7 is the column, 8 is the screw rod, 9 is the hexagonal hole, 10 is the expansion plug, 11 is the friction plate, 12 is the action plate, 13 is the action inclined surface, 14 is the connecting rod, 15 is the hoop, 16 is the fixing bolt, 17 is the fixing nut, 18 is the reinforcement ring, 19 is the clamping block, and 20 is the clamping groove. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0023] like Figure 1 As shown in FIG. 10 , the present invention provides a driving device for a stainless steel guardrail column of a highway, comprising a column head 1, a friction plate 11, an expansion plug 10, a screw rod 8, and a reinforcement ring 18.

[0024] The column head 1 is a vertically arranged variable diameter cylindrical structure, including a small diameter section 2 on the upper side and a large diameter section 3 on the lower side. An upper side action groove 4 is arranged at the center of the upper end surface of the small diameter section 2, and a lower side action groove 5 is arranged at the center of the lower end surface of the large diameter section 3. A partition is arranged between the upper side action groove 4 and the lower side action groove 5, and an internal threaded hole 6 penetrating from top to bottom is arranged at the center of the partition.

[0025] The upper end opening of the column 7 is sleeved in the lower side action groove 5 of the column head 1 .

[0026] A vertical screw rod 8 is screwed inside the internal threaded hole 6 of the partition of the column head 1, a hexagonal hole 9 is provided at the upper end surface of the screw rod 8, and a plug 10 is fixedly provided at the lower end of the screw rod 8. The plug 10 is an inverted truncated cone structure with a thick upper part and a thin lower part, and the plug 10 is coaxially arranged with the screw rod 8.

[0027] Four friction plates 11 are arranged around the expansion plug 10. The four friction plates 11 are arranged in a circular array around the axis of the screw rod 8. The four friction plates 11 are located inside the upper opening of the column 7. The friction plate 11 is a circular arc plate structure. The axis of the friction plate 11 is arranged vertically. The outer arc surface of the friction plate 11 contacts the inner side surface of the upper opening of the column 7. An action plate 12 is fixedly arranged in the middle of the inner arc surface of the friction plate 11. The action plate 12 is a vertically arranged square plate structure. The action plate 12 is perpendicular to the inner arc surface of the friction plate 11. The axis of the screw rod 8 is located in the plane where the action plate 12 is located. An action inclined surface 13 is arranged on the upper end of the edge of one side of the action plate 12 away from the friction plate 11. The inclination of the action inclined surface 13 is consistent with the inclination of the outer conical surface of the expansion plug 10. The action inclined surface 13 on the action plate 12 of the friction plate 11 is kept in contact with the outer conical surface of the expansion plug 10.

[0028] The outer arc surfaces of all friction plates 11 are knurled to increase the friction between the friction plates 11 and the upper opening of the pillar 7 .

[0029] A connecting rod 14 is rotatably provided at the middle of the upper end of each action plate 12 , the lower end of the connecting rod 14 is hinged to the action plate 12 , and the upper end of the connecting rod 14 is hinged to the inner top surface of the lower action groove 5 of the column head 1 .

[0030] Two symmetrical semi-cylindrical hoops 15 are arranged outside the upper opening of the column 7, and both hoops 15 fit the outer side of the column 7. Upper and lower groups of bolt holes are arranged on the side wall of the column 7, and upper and lower bolt holes are also arranged on each hoop 15. The fixing bolts 16 pass through the bolt holes on the two hoops 15 and the bolt holes on the column 7 in turn, and then are screwed with fixing nuts 17, so that the two hoops 15 are fixed to the outer side of the column 7.

[0031] A semicircular reinforcing ring 18 is fixedly arranged near the upper end of the outer side of the hoop 15, and a half-circle square clamping block 19 is arranged equidistantly on the upper end surface of the reinforcing ring 18. Vertical and horizontal reinforcing strips are fixedly arranged on the outer side of the hoop 15.

[0032] A circle of square clamping grooves 20 is arranged at the lower end opening of the lower action groove 5 of the column head 1 .

[0033] The upper end openings of the two spliced ​​hoops 15 are inserted into the lower end opening of the lower side action groove 5 of the column head 1, the upper end surface of the reinforcement ring 18 outside the hoop 15 contacts the lower end surface of the column head 1, and the clamping blocks 19 on the hoop 15 are respectively clamped into a circle of clamping grooves 20 inside the lower side action groove 5 of the column head 1.

[0034] The working principle of the present invention is: When it is necessary to drive the column 7 into the ground at the installation location, first fix the two hoops 15 to the outside of the column 7 by means of fixing bolts 16 and fixing nuts 17, then place the column head 1 with the screw rod 8, the expansion plug 10 and the friction plate 11 on the upper end of the column 7, so that the friction plate 11 and the expansion plug 10 are placed inside the upper end opening of the column 7, so that the upper end surface of the reinforcement ring 18 on the outside of the hoop 15 contacts the lower end surface of the column head 1, and the clamping blocks 19 on the hoop 15 are respectively clamped into a circle of clamping grooves 20 inside the lower side action groove 5 of the column head 1.

[0035] Then, the screw rod 8 is gradually screwed in, so that the screw rod 8 gradually enters the lower action groove 5, and the screw rod 8 drives the expansion plug 10 to gradually descend. The outer conical surface of the expansion plug 10 interacts with the action inclined surface 13 of the action plate 12 of the four friction plates 11, so that the four friction plates 11 gradually expand outward along the radial direction of the screw rod 8, so that the outer arc surface of the four friction plates 11 is in close contact with the inner wall of the upper end opening of the column 7, and the four friction plates 11 press the inner wall of the upper end opening of the column 7. At this time, the upper end of the screw rod 8 enters the upper action groove 4 of the column head 1.

[0036] Then, the upper end of the column head 1 is hammered by the pile driving equipment. Since the screw rod 8 is screwed to the column head 1, the column head 1 drives the expansion plug 10 to descend through the screw rod 8, and the expansion plug 10 drives the four friction plates 11 to descend. Since the four friction plates 11 are completely pressed against the inner wall of the upper end opening of the column 7, the four friction plates 11 drive the column 7 to move downward. Under the action of the column head 1, the column 7 is gradually hammered into the ground, thereby completing the installation of the column 7.

[0037] During the construction process, the strong vertical impact force that originally directly acts on the upper end surface of the column 7 is innovatively converted into a vertical friction force along the surface of the column 7. This conversion effectively improves the stability and controllability of the driving process.

[0038] As one of the key technologies of the present invention, the internal expansion mechanism is exquisitely designed in that it can automatically enhance the expansion effect as the column 7 gradually goes deeper. This feature ensures that sufficient friction can be continuously provided during the driving process, thereby effectively preventing the column 7 from slipping or loosening, and ensuring the reliability of construction quality.

[0039] The core function of the semicircular hoops 15 on both sides is to enhance the vertical friction between the driving device and the column 7 and effectively curb the deformation of the column in the radial direction, thereby preventing the occurrence of adverse situations such as the "mushroom head" phenomenon or weld cracking.

[0040] More importantly, the combined structural design of inner expansion and outer hoop not only strengthens the overall rigidity of the column 7, but also significantly improves its ability to resist deformation during the driving process. This innovative design effectively avoids the local deformation and material or weld cracking of the column 7 under complex construction conditions, ensuring the overall stability and safety of the highway guardrail.

[0041] Horizontal and vertical reinforcement strips are arranged on the outside of the hoop 15, the main purpose of which is to optimize the bending section modulus of the hoop and improve its ability to resist bending deformation. At the same time, these reinforcement strips are cleverly arranged at the intersection position to set the bolt holes, which effectively disperses the axial tension applied by the bolts and ensures the overall force balance of the structure.

[0042] A reinforcement strip is also provided on the outside of the hoop 15, and its main function is to stably bear the hammer force transmitted by the impacted column head 1. The reinforcement ring provided above the bolt hole takes into account the convenience of the fixed bolt connection, and its plane feature provides a stable support surface for the installation of the fixed bolt. It is worth noting that the spacing between the two bolt holes accurately matches the original bolt hole spacing on the column 7. This detailed design not only simplifies the installation process and avoids the tediousness of secondary hole drilling, but also effectively protects the integrity of the column structure and prevents structural damage caused by additional processing.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A driving device for a highway stainless steel guardrail column, characterized in that: The invention comprises a column head (1), a vertical screw rod (8) is screwed inside the column head (1), an expansion plug (10) is fixedly arranged at the lower end of the screw rod (8), the expansion plug (10) is an inverted truncated cone structure with a thick upper part and a thin lower part, four friction plates (11) are arranged around the expansion plug (10), the four friction plates (11) are located inside the upper end opening of the column (7), an action plate (12) is fixedly arranged in the middle of the inner arc surface of the friction plate (11), a connecting rod (14) is rotatably arranged in the middle of the upper end of each action plate (12), the upper end of the connecting rod (14) is hinged to the column head (1), an action inclined surface (13) is arranged at the upper end of the edge of the action plate (12) away from the friction plate (11), and the action inclined surface (13) on the action plate (12) of the friction plate (11) is kept in contact with the outer conical surface of the expansion plug (10).

2. The driving device for highway stainless steel guardrail posts according to claim 1 is characterized in that: The column head (1) is a vertically arranged cylindrical structure with a variable diameter, comprising a small diameter section (2) on the upper side and a large diameter section (3) on the lower side; an upper action groove (4) is arranged at the center of the upper end surface of the small diameter section (2); a lower action groove (5) is arranged at the center of the lower end surface of the large diameter section (3); a partition is arranged between the upper action groove (4) and the lower action groove (5); a vertically penetrating internal threaded hole (6) is arranged at the center of the partition; a screw rod (8) is screwed into the internal threaded hole (6); and the upper end of the connecting rod (14) is hinged to the inner top surface of the lower action groove (5).

3. The driving device for highway stainless steel guardrail posts according to claim 1 is characterized in that: A hexagonal hole (9) is provided on the upper end surface of the screw rod (8).

4. The driving device for highway stainless steel guardrail posts according to claim 2 is characterized in that: The upper end opening of the upright column (7) is sleeved inside the lower side action groove (5) of the column head (1).

5. The driving device for highway stainless steel guardrail posts according to claim 1 is characterized in that: The friction plate (11) is an arc-shaped plate-like structure, the axis of the friction plate (11) is arranged vertically, and the outer arc surface of the friction plate (11) contacts the inner side surface of the upper end opening of the column (7).

6. The driving device for highway stainless steel guardrail posts according to claim 1 is characterized in that: The action plate (12) is a vertically arranged square plate-shaped structure. The action plate (12) is perpendicular to the inner arc surface of the friction plate (11), and the axis of the screw rod (8) is located in the plane where the action plate (12) is located.

7. The driving device for highway stainless steel guardrail posts according to claim 1 is characterized in that: The inclination of the action inclined surface (13) on the action plate (12) of the friction plate (11) is consistent with the inclination of the outer conical surface of the expansion plug (10).

8. The driving device for highway stainless steel guardrail posts according to claim 2 is characterized in that: Two symmetrical semi-cylindrical hoops (15) are also arranged on the outer side of the upper end opening of the column (7), and the two hoops (15) are both fitted with the outer side surface of the column (7); two upper and lower groups of bolt through holes are arranged on the side wall of the column (7), and two upper and lower bolt through holes are also arranged on each hoop (15). The fixing bolts (16) are sequentially passed through the bolt through holes on the two hoops (15) and the bolt through holes on the column (7) and then screwed with fixing nuts (17), so that the two hoops (15) are fixed to the outer side of the column (7).

9. The driving device for highway stainless steel guardrail posts according to claim 8, characterized in that: A semicircular reinforcing ring (18) is fixedly arranged on the outer side surface of the hoop (15) near the upper end, and a semicircular square clamping block (19) is arranged at equal distances on the upper end surface of the reinforcing ring (18).

10. The driving device for highway stainless steel guardrail posts according to claim 9, characterized in that: A circle of square clamping grooves (20) is provided at the lower end opening of the lower side action groove (5) of the column head (1); the upper end openings of the two spliced ​​hoops (15) are inserted into the lower end opening of the lower side action groove (5) of the column head (1); the upper end surface of the reinforcement ring (18) outside the hoops (15) contacts the lower end surface of the column head (1); and the clamping blocks (19) on the hoops (15) are respectively clamped into the inner part of a circle of clamping grooves (20) of the lower side action groove (5) of the column head (1).

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