Pulling-out device for highway stainless steel guardrail stand column

Abstract

The pulling-out device comprises a sleeve and an expansion plug, the sleeve is of a cylindrical structure with an opening in the lower end, the opening in the lower end of the sleeve is connected to the outer side of an opening in the upper end of the stand column in a sleeved mode, and four friction plates are arranged in the sleeve. 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 at the upper end of the edge of the side, away from the friction plate, of the acting plate, and the upper end of the connecting rod is hinged to the inner top face of the sleeve. An acting slope is arranged at the lower end of one side edge of the acting plate away from the friction plate; the expansion plug is of a circular truncated cone-shaped structure with a thin upper part and a thick lower part, the expansion plug is located among the four friction plates, and the outer side conical surface of the expansion plug is attached to the inclined surfaces of the action plates of the four friction plates; an actuating rod is arranged on the upper end face of the expansion plug, and a lifting hook is fixedly arranged at the upper end of the actuating rod; the problem that an existing driven type guardrail steel stand column is prone to being damaged when being pulled out is solved.

Description

Technical Field

[0001] This utility model belongs to the field of column installation technology, specifically relating to a pull-out device for stainless steel guardrail columns on highways. Background Technology

[0002] During the construction of driven steel posts for highway guardrails, uneven linear appearance of the guardrail or incorrect post positioning often necessitates pull-out operations. Currently, pull-out operations mainly rely on two methods: one is to use hydraulic clamps, which is efficient, but if the clamping force is not precisely controlled, it can easily lead to post deformation, and the equipment cost is high; the other is to insert steel bars into the bolt holes of the post and use the steel bars as fulcrums for hoisting and pulling out. Although this method is lower in cost, improper selection of steel bar dimensions can easily cause deformation or even tearing of the bolt holes, seriously affecting the reuse of the post and the overall structural safety.

[0003] With the continuous innovation of the steel industry, high-strength steel, with its superior mechanical properties and good economic efficiency, is increasingly widely used in traffic safety facilities. To reduce the cost of guardrails and minimize resource consumption, the design of guardrail posts is moving towards lightweight construction, which involves reducing material usage by thinning the wall thickness while ensuring safety performance. However, this lightweight trend also brings new challenges: although the strength of high-strength steel has significantly improved, its Young's modulus—the material's ability to resist elastic deformation—has not increased at the same rate. Therefore, during the pull-out process, lightweight posts are more prone to localized instability and failure at the fixed position after being pulled out.

[0004] Against this backdrop, developing a post-removal device that integrates high efficiency, reliability, economy, and convenience has become a key technological bottleneck that urgently needs to be overcome in the field of traffic safety engineering. This device must be able to quickly and without damage remove the post without compromising its structural integrity, thereby providing strong support for the maintenance and upgrading of highway guardrail systems and further promoting the improvement of road traffic safety. Utility Model Content

[0005] This utility model overcomes the shortcomings of the prior art and proposes a pull-out device for stainless steel guardrail posts on highways; it solves the problem that the current driven guardrail steel posts are easily damaged during the pull-out operation.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] The utility model provides a kind of pulling-out device for highway stainless steel guardrail post, including sleeve, expansion plug, the sleeve is the cylindrical structure of lower end opening, sleeve is connected to the outside of the upper end opening of post in lower end opening, four friction plates are arranged in the inside of sleeve, one plate of action board is fixedly arranged in the middle of inner side arc surface of friction plate, one connecting rod is rotatably arranged on the upper end of side edge of action board away from friction plate, the upper end of connecting rod is hinged with the inside top surface of sleeve;Action bevel is arranged on the lower end of side edge of action board away from friction plate;The expansion plug is the circular table structure of upper thin lower thick, expansion plug is located between four friction plates, the outer side conical surface of expansion plug is attached with the bevel of action board of four friction plates;One action rod is arranged on the upper end surface of expansion plug, and hook is fixedly arranged on the upper end of action rod.

[0008] Further, the inner diameter of the sleeve is 1.5mm larger than the outer diameter of the post.

[0009] Further, an up-and-down through-plugging hole is arranged at the center of the top plate of the sleeve, and the action rod is plugged into the plugging hole in the top plate of the sleeve.

[0010] Further, the four friction plates are arranged around the axis of the sleeve, and the four friction plates are all located inside the upper end opening of the post.

[0011] Further, the friction plate is a circular arc plate structure, the axis of the friction plate is kept vertical, anti-skid lines are arranged on the outer side arc surface of the friction plate, and the outer side arc surface of the friction plate is in contact with the inner side surface of the upper end opening of the post.

[0012] Further, the action board is a square plate structure arranged vertically, the action board is perpendicular to the inner side arc surface of the friction plate, and the axis of the post is located in the plane where the action board is located.

[0013] Further, the slope of the outer side conical surface of the expansion plug is consistent with the slope of the bevel of the action board of the friction plate.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] (1) The pulling-out device for highway stainless steel guardrail post can effectively prevent the deformation and cracking of the material around the bolt hole during the pulling-out process of the post. Through the precise design of the pulling-out mechanism and the structural reinforcement measures, the device can uniformly distribute the force during the pulling-out operation, avoid local stress concentration, and thus significantly reduce the impact and damage to the material around the bolt hole. In addition, the specially designed friction plate and expansion plug work together to ensure stable contact and sufficient friction during the pulling-out process, further protect the integrity of the post structure, and prolong the service life of the guardrail system.

[0016] (2) The pulling-out device for the highway stainless steel guardrail stand column provided by the utility model can be compatible with the existing hoisting type pile puller for construction, and special equipment does not need to be additionally purchased, so that efficient and reliable stand column pulling-out operation is realized under the premise of not increasing the cost of pulling out the steel stand column. This design not only reduces the initial investment and operation cost of the construction unit, but also improves the operation efficiency. Meanwhile, through close cooperation with the stand column structure and precise control, the device ensures the consistency of the pulling-out effect and the structural integrity of the stand column, and provides an economic and efficient solution for the maintenance and upgrading of the highway guardrail system.

[0017] (3) The pulling-out device for the highway stainless steel guardrail stand column provided by the utility model can automatically adjust the expansion tightness according to the actual situation of the stand column during the stand column pulling-out process, and ensure that the device and the stand column always maintain a stable connection state. During the pulling-out process, the sleeve pipe is always sleeved on the outside of the upper end opening of the stand column, so that the expansion phenomenon of the upper end opening of the stand column is obviously inhibited, thereby ensuring that the stand column will not be accidentally damaged during the pulling-out process. The expansion structure not only improves the safety and reliability of the pile pulling operation, but also significantly improves the construction efficiency and reduces the waste of manpower and time.

[0018] (4) The pulling-out device for the highway stainless steel guardrail stand column provided by the utility model adopts knurling process on the friction plate in order to further enhance the friction force between the pulling-out device and the stand column. The knurling process forms small concave-convex textures on the surface of the friction plate, effectively increases the friction coefficient, so that the friction plate can be more closely attached to the inner wall of the stand column during the pulling-out process, and greater friction force is provided. This innovative application not only improves the pulling-out effect, but also prolongs the service life of the friction plate and reduces the maintenance cost. At the same time, the processing of the knurling process also improves the wear resistance of the friction plate, so that it can maintain good working condition in various harsh environments.

[0019] (5) The pulling-out device for the highway stainless steel guardrail stand column provided by the utility model designs an action rod with a lifting hook in order to realize the quick installation and disassembly of the pulling-out device. The action rod is one of the key components of the pulling-out device, and its design directly affects the smooth progress of the pile pulling operation. The action rod of the utility model adopts a smooth surface design to reduce the friction resistance with the inner wall of the sleeve. At the same time, the lifting hook is arranged at the top of the action rod, which is convenient for the construction personnel to use the hoisting equipment for installation and disassembly operation. This design not only simplifies the construction process and improves the operation efficiency, but also ensures the stability and safety of the pulling-out device during the installation and disassembly process. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described in detail in combination with the drawings:

[0021] Figure 1It is the whole three-dimensional schematic view of the utility model;

[0022] Figure 2 It is the schematic view after cutting of the utility model;

[0023] Figure 3 It is Figure 2 The local enlarged schematic view of A in the middle;

[0024] Figure 4 It is the structural schematic view between the expansion plug and four friction plates;

[0025] Figure 5 It is the structural schematic view between the expansion plug and one of the friction plates Figure 1 ;

[0026] Figure 6 It is the structural schematic view between the expansion plug and one of the friction plates Figure 2 ;

[0027] Figure 7 It is the three-dimensional schematic view of the friction plate Figure 1 ;

[0028] Figure 8 It is the three-dimensional schematic view of the friction plate Figure 2 ;

[0029] Among them, 1 is a sleeve, 2 is a plug hole, 3 is a friction plate, 4 is an anti-skid line, 5 is an action plate, 6 is an action slope, 7 is a connecting rod, 8 is an expansion plug, 9 is an action rod, 10 is a hook, and 11 is a stand. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model is further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. The technical scheme of the utility model is described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0031] As Figure 1 -8, the utility model provides a kind of puller for highway stainless steel guardrail stand, including sleeve 1, friction plate 3, expansion plug 8.

[0032] The sleeve 1 is the cylindrical structure of lower end opening, and the lower end opening of sleeve 1 is sleeved on the outer side of the upper end opening of stand 11, the inner diameter of sleeve 1 is 1.5mm larger than the outer diameter of stand 11, to ensure that sleeve 1 can be smoothly sleeved on the outer side of the upper end opening of stand 11, also effectively limit the radial expansion of stand 11 during pulling out, to ensure the stability of structure. An upper and lower through plug hole 2 is provided at the top plate center of sleeve 1.

[0033] Four friction plates 3 are arranged inside the sleeve 1, and the four friction plates 3 are arranged around the axis of the sleeve 1 and are located inside the upper end opening of the stand 11. The friction plate 3 is a circular arc plate structure, the axis of the friction plate 3 is kept vertical, and the outer side arc surface of the friction plate 3 is provided with anti-skid lines 4, and the outer side arc surface of the friction plate 3 is in contact with the inner side surface of the upper end opening of the stand 11; a working plate 5 is fixedly arranged in the middle of the inner side arc surface of the friction plate 3, the working plate 5 is a square plate structure arranged vertically, the working plate 5 is perpendicular to the inner side arc surface of the friction plate 3, and the axis of the stand 11 is located in the plane where the working plate 5 is located. An action inclined surface 6 is arranged at the lower end of the side edge of the working plate 5 away from the friction plate 3. A connecting rod 7 is rotatably arranged at the upper end of the side edge of the working plate 5 away from the friction plate 3, the lower end of the connecting rod 7 is hinged to the friction plate 3, and the upper end of the connecting rod 7 is hinged to the inner top surface of the sleeve 1.

[0034] The expander 8 is a circular truncated cone structure with a thin upper end and a thick lower end, the expander 8 is located between the four friction plates 3, the slope of the outer side conical surface of the expander 8 is consistent with the slope of the inclined surface of the working plate 5 of the friction plate 3, and the outer side conical surface of the expander 8 is in close contact with the inclined surface of the working plate 5 of the four friction plates 3. A vertical action rod 9 is detachably arranged at the upper end of the expander 8, and the action rod 9 is inserted into the insertion hole 2 in the top plate of the sleeve 1. A lifting hook 10 is fixedly arranged at the upper end of the action rod 9.

[0035] The working principle of the utility model is as follows:

[0036] When it is necessary to pull out the stand 11, the expander 8 and the four friction plates 3 are inserted into the upper end opening of the stand 11, and then the sleeve 1 is sleeved outside the upper end opening of the stand 11.

[0037] Then, the lifting hook 10 is connected with the hoisting equipment, the lifting hook 10, the action rod 9 and the expander 8 are hoisted as a whole by the hoisting equipment, the expander 8 starts to rise between the four friction plates 3, the outer side conical surface of the expander 8 is in sliding contact with the inclined surface of the working plate 5 of the four friction plates 3, under the mutual action of the working plate 5 and the expander 8, the four friction plates 3 start to move outward along the radial direction, so that the outer side arc surface of the friction plate 3 is closely attached to the inner side surface of the upper end opening of the stand 11, the friction plate 3 is closely attached to the inner side surface of the stand 11, and a strong locking effect is formed.

[0038] With the continuous work of the hoisting equipment, the expander 8 continues to rise, the expander 8 drives the four friction plates 3 to continue to rise, and the four friction plates 3 pull out the stand 11 under the locking action.

[0039] The four friction plates 3 are expanded outwardly under the action of the expansion plug 8, so that the upper end opening of the column 11 is also slightly expanded outwardly. Since the sleeve 1 is sleeved on the outside of the upper end opening of the column 11, the expansion phenomenon of the upper end opening of the column 11 is obviously inhibited, so as to ensure that the column 11 will not be accidentally damaged during the pulling-out process.

[0040] The anti-skid lines 4 treated by knurling process are arranged on the outer cylindrical surface of the friction plate 3, which significantly increases the friction coefficient between the friction plate 3 and the inner surface of the column 11, thereby enhancing the friction force between the column 11 and the friction plate 3 during the pulling-out process.

[0041] Especially crucially, when the upward relative displacement between the pulling-out device and the column 11 occurs, the relative displacement will be significantly inhibited due to the close fit and strong friction force between the friction plate 3 and the inner wall of the column 11. With the increase of the pulling-out force, the friction force between the friction plate 3 and the column 11 will be further increased, forming a self-enhancing locking mechanism, which effectively prevents the accidental sliding or falling of the column 11 during the pulling-out process, and ensures the safety and reliability of the pulling-out operation.

[0042] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A pullout device for a highway stainless steel guardrail post, characterized by: The utility model relates to a kind of expansion plug and sleeve, including sleeve (1), expansion plug (8), the sleeve (1) is the cylindrical structure of lower end opening, the lower end opening of sleeve (1) is sleeved to the outside of the upper end opening of stand (11), four friction plates (3) are arranged in the inside of sleeve (1), one piece of action plate (5) is fixedly arranged in the inner side arc surface middle part of friction plate (3), a connecting rod (7) is rotatably arranged on the side edge upper end of action plate (5) away from friction plate (3), the upper end of connecting rod (7) is hinged with the inside top surface of sleeve (1);Action bevel (6) is arranged on the side edge lower end of action plate (5) away from friction plate (3);The expansion plug (8) is the circular truncated cone structure of upper thin lower thick, expansion plug (8) is located between four friction plates (3), the outer side conical surface of expansion plug (8) is attached with the bevel of the action plate (5) of four friction plates (3);A action rod (9) is arranged on the upper end surface of expansion plug (8), and hook (10) is fixedly arranged on the upper end of action rod (9).

2. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: The inner diameter of sleeve (1) is 1.5mm larger than the outer diameter of stand (11).

3. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: A through plug hole (2) is arranged at the center of the top plate of sleeve (1), and the action rod (9) is inserted into the plug hole (2) on the top plate of sleeve (1).

4. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: Four friction plates (3) are arranged around the axis of sleeve (1), and four friction plates (3) are located inside the upper end opening of stand (11).

5. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: The friction plate (3) is a circular arc plate structure, and the axis of the friction plate (3) remains vertical, and the outer side arc surface of the friction plate (3) is provided with anti-skid lines (4), and the outer side arc surface of the friction plate (3) is in contact with the inner side surface of the upper end opening of the stand (11).

6. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: The action plate (5) is a vertically arranged square plate structure, and the action plate (5) is perpendicular to the inner side arc surface of the friction plate (3), and the axis of the stand (11) is located in the plane where the action plate (5) is located.

7. A pullout device for highway stainless steel guardrail posts according to claim 1, characterized in that: The slope of the outer side conical surface of the expansion plug (8) is consistent with the slope of the bevel of the action plate (5) of the friction plate (3).

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