Aerial work platform drawbar device

Abstract

The utility model relates to power station boiler hearth overhauling technical field, concretely says a high altitude operation lifting platform pull rod device, include: the column support, the column support vertical standing installs on platform bottom beam, transition connecting piece, pull rod, the pull rod is connected with platform bottom beam through transition connecting piece, and the tension part, the pull rod is connected with the upper end portion of column support through the tension part. The hard connection structure that truss type column support and rigid pull rod constitute, the overall stiffness and strength are far superior to steel wire rope cable and single limb steel pipe support column. Can effectively restrain the elastic of overhanging platform caused by personnel walking, provides stable structure stress for high altitude operation lifting platform whole, fundamentally puts an end to the high altitude operation lifting platform because of cable component failure, causes the platform of high altitude suspension to have safety accident.

Description

Technical Field

[0001] This utility model relates to the field of power plant boiler furnace maintenance technology, specifically a tie rod device for a high-altitude work platform, used as a tensioning tie rod device for the long cantilever structure work platform of a boiler furnace maintenance lifting platform (hereinafter referred to as "maintenance platform"). Background Technology

[0002] Boiler furnace maintenance lifting platforms in power plants typically require cantilevered walkways to accommodate complex internal furnace structures such as flame deflectors and water-cooled screens. This is especially true for large boilers (300MW and above), where the cantilevered walkways are particularly long and extensive. During maintenance work, personnel and materials tend to concentrate at the front of these cantilevered walkways, resulting in significantly higher loads on this area compared to other parts of the platform. Therefore, it is crucial to ensure sufficient load-bearing capacity and structural stability.

[0003] Currently, the conventional approach to improving the load-bearing capacity of cantilevered walkways is to use steel wire ropes to reinforce the structure. However, this existing technology has several drawbacks: First, the installation and dismantling process is cumbersome, requiring the installation of multiple components such as steel wire rope clips, columns, and pulleys, as well as tensioning the steel wire ropes, resulting in low efficiency. Second, after the steel wire ropes are tensioned, when multiple workers move on the walkway simultaneously, it causes elastic vibration of the steel wire ropes, leading to instability at the ends of the cantilevered walkway and posing a certain safety hazard. Third, the single-limb steel pipes that support the columns of the steel wire ropes are prone to bending and deformation under large tensile forces, causing them to lose their effective tensioning function and potentially leading to the breakage of the cantilevered walkway and causing serious accidents.

[0004] Therefore, there is an urgent need for a cantilevered walkway tensioning solution that can overcome the above-mentioned defects, has higher rigidity and stronger stability, and is easy to assemble and disassemble. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of existing steel wire rope cables, such as poor stability, complicated installation, and easy deformation of supporting components, and to provide a high-altitude work platform tie rod device that is structurally stable, can be quickly installed and disassembled, and can effectively suppress the elastic vibration of the maintenance platform.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a tie rod device for an aerial work platform, comprising: The column support is vertically installed on the bottom beam of the platform; Transition connectors; A tie rod, which is connected to the platform bottom beam via the transition connector; The tensioning part connects the tie rod to the upper end of the column support. The column positioning groove is located on the bottom beam of the platform.

[0007] Furthermore, the column support includes two main column members on the left and right, a column crossbeam connecting the two main column members, and a column ear plate disposed on the column crossbeam near the upper end; the column ear plate is provided with a column ear plate pin hole.

[0008] Furthermore, the platform bottom beam is provided with a column positioning groove, and the lower end of the column main member is provided with a column positioning pin hole. The pin shaft passes through the column positioning groove pin hole and the column positioning pin hole to realize the column support and the column positioning groove for installation and fixation.

[0009] Furthermore, the pull rod includes a pull rod body and pull rod lugs disposed at both ends of the pull rod body, and the pull rod lugs are provided with pull rod lug holes.

[0010] Furthermore, the tie rod is divided into a front tie rod located on the front side of the column support and a rear tie rod located on the rear side of the column support.

[0011] Furthermore, the transition connector includes a saddle plate and a fixed lug plate; the saddle plate is provided with a tie rod mounting pin hole for connecting with the tie rod; the fixed lug plate is provided with a fixing hole for connecting with a fixing seat on the platform bottom beam.

[0012] Furthermore, the saddle plate consists of two pieces, with a tie rod lug plate mounting position formed between the two saddle plates to accommodate the tie rod lug plate; the fixed lug plate consists of two pieces, with a fixed seat mounting position formed between the two fixed lug plates to accommodate the fixed seat on the platform bottom beam.

[0013] Furthermore, the tensioning part is a turnbuckle, and the turnbuckle has lead screw rings at both ends.

[0014] Furthermore, the lead screw ring at one end of the turnbuckle is hinged to the pull rod lug at the upper end of the pull rod via a pin, and the lead screw ring at the other end is hinged to the column lug on the column support via a pin.

[0015] Compared with the prior art, the present invention has the following significant advantages: 1. High safety and reliability: The overall strength of the rigid connection structure composed of truss-type column support and rigid tie rods is far superior to the tension structure composed of wire rope cable support and single-limb steel pipe support columns. It can effectively suppress the elastic vibration of the cantilevered maintenance platform caused by personnel movement, providing a stable structure and fundamentally eliminating safety accidents caused by the failure of the maintenance platform cable components.

[0016] 2. Significantly improved load-bearing capacity: By applying pre-tightening force to the tie rod through the tensioning part (such as turnbuckle), upward pre-stress can be generated at the end of the cantilevered walkway, which significantly improves its stress state and thus greatly enhances the load-bearing capacity of the cantilever end.

[0017] 3. Convenient and efficient installation and disassembly: All connections adopt a lug and pin structure, enabling modular installation. No complex tensioning procedures or special tools are required; ordinary operators can quickly complete assembly and disassembly, greatly improving the preparation efficiency of the maintenance platform.

[0018] 4. Stable structure and long service life: The rigid connection avoids repeated bending and wear of the wire rope, and all metal components can be reused for a long time, reducing maintenance costs and material consumption.

[0019] 5. Standardization and Normativity: This device can be managed as a standard module, which improves the standardization and professionalism of maintenance operations. Attached Figure Description

[0020] Figure 1 : A schematic diagram of the overall structure of the tie rod device for the aerial work platform of this utility model; Figure 2 : Front view of the column support of this utility model; Figure 3 Side view of the column support of this utility model; Figure 4 : Front view of the pull rod of this utility model; Figure 5 Side view of the pull rod of this utility model; Figure 6 : Front view of the transition connector of this utility model; Figure 7 Side view of the transition connector of this utility model; In the diagram: 1. Column support, 101. Main column member, 1011. Column positioning pin hole, 102. Column crossbeam, 103. Column ear plate, 1031. Column ear plate pin hole; 2. Tie rod, 21. Front tie rod, 22. Rear tie rod, 201. Tie rod body, 202. Tie rod ear plate, 2021. Tie rod ear plate hole; 3. Transition connector, 301. Saddle plate, 3011. Tie rod mounting pin hole, 3012. Tie rod ear plate mounting position, 302. Fixed ear plate, 3021. Fixed hole, 3022. Fixed seat mounting position; 4. Tensioner, 41. Turnbuckle, 411. Screw ring; 5. Column positioning groove, 501. Column positioning groove pin hole. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] A tie rod device for an aerial work platform is disclosed, the core of which lies in the rigid connection structure combining a rigid tie rod and a truss-type support column, replacing the traditional tensioning structure composed of flexible steel wire rope cable tensioning and single-limb steel pipe support columns. The device mainly includes a column support, tie rod, transition connector, and tensioning section. The column support is vertically fixed to the bottom beam of the maintenance platform, and its structure is preferably truss-type, including two main column limbs on the left and right sides, and several column crossbeams connecting the two main column limbs, thus forming a stable frame structure and effectively avoiding the problem of easy bending of single-limb columns. The tie rod is used to transmit the load borne by the cantilevered walkway, and its two ends are equipped with tie rod lugs. The tie rod is connected to the platform bottom beam through the transition connector. The tensioning section is the key component for adjusting the preload of this invention, and preferably uses a turnbuckle. The turnbuckle has threaded rings at both ends, which are hinged to the tie rod lug at the upper end of the tie rod and the column lug at the upper end of the column support via pins. By rotating the turnbuckle, the effective length of the tie rod can be precisely adjusted. The connection of each component is preferably achieved by using pins with locking pins or bolts instead of pins, so as to achieve a reliable rigid connection and ensure that the structure does not wobble. Example

[0023] like Figure 1 As shown, the aerial work platform tie rod device consists of five parts: column support 1, tie rod 2, transition connector 3, tensioning part 4, and column positioning groove 5.

[0024] like Figure 2 , 3 As shown, the column support 1 has two main column members 101 on the left and right, and a column crossbeam 102 is arranged vertically between the two main column members 101. A column ear plate 103 is provided in the middle of the column crossbeam 102 near the upper end. The column ear plate 103 has a column ear plate pin hole 1031, which is symmetrically arranged on both sides of the column crossbeam 102 at the upper end of the column support 1. A column positioning pin hole 1011 is provided at the lower end of the main column member 101.

[0025] like Figure 4 , 5 As shown, the pull rod 2 is composed of a pull rod body 201 and a pull rod ear plate 202. The pull rod ear plate 202 is provided with a pull rod ear plate hole 2021. The pull rod ear plate 202 is set at both ends of the pull rod body 201. The pull rod ear plate 202 with double ear plate structure needs to be symmetrically welded to both sides of the pull rod body 201.

[0026] like Figure 6 , 7As shown, the transition connector 3 consists of two parts: a saddle plate 301 and a fixed ear plate 302. The saddle plate 301 has a tie rod mounting pin hole 3011, and the fixed ear plate 302 has a fixing hole 3021. A tie rod ear plate mounting position 3012 is provided between the two saddle plates 301, and a fixing seat mounting position 3022 is provided between the two fixed ear plates 302; the dimensions of the fixing seat mounting position 3022 match the dimensions of the fixing seat on the bottom beam of the maintenance platform.

[0027] like Figure 1 As shown, the tensioning part 4 uses a turnbuckle 41 with double-headed positive and negative screws, and the two ends of the turnbuckle 41 have threaded rings 411.

[0028] like Figure 1 As shown, the column positioning groove 5 is located on the platform bottom beam, the column support 1 is installed on the column positioning groove 5, one end of the tie rod 2 is connected to one end of the tensioning part 4, and the other end of the tensioning part 4 is installed on the upper end of the column support 1; the tie rod 2 is divided into a front tie rod 21 and a rear tie rod 22, the upper ends of the two transition connectors 3 are respectively connected to the other ends of the front and rear tie rods 2, and the lower ends of the front and rear transition connectors 3 are respectively installed on the maintenance platform bottom beam at the rear fixed end of the column support 1 and on the maintenance platform bottom beam at the front cantilevered walkway end of the column support 1.

[0029] like Figure 1 As shown, the transition connector 3 is connected to the fixed seat on the bottom beam of the maintenance platform through the fixed ear plate 302 and is installed on the bottom beam of the maintenance platform; the tie rod 2 is connected to the saddle plate 301 through the tie rod ear plate 202; the other end of the tie rod 2 is hinged to the screw ring 411 through the tie rod ear plate 202 to connect with the turnbuckle 41; the turnbuckle 41 is installed on the column ear plate 103 through the screw ring 411 at the other end.

[0030] During installation, first place the lower end of the column support 1 into the pre-set column positioning groove 5 on the platform bottom beam, align the column positioning pin hole 1011 at the lower end of the column main member 101 with the column positioning groove pin hole 501, insert the pin shaft and lock it, and securely fix the column support 1 on the platform bottom beam.

[0031] Next, install the transition connector 3. Insert the mounting position 3022 of the transition connector 3 into the corresponding mounting seat on the platform's bottom beam, aligning the mounting hole 3021 on the mounting lug 302 with the hole on the mounting seat. Insert the pin and lock it in place. The transition connector 3 corresponding to the rear tie rod 22 is installed on the bottom beam at the fixed end of the maintenance platform, and the transition connector 3 corresponding to the front tie rod 21 is installed on the bottom beam at the cantilever end of the maintenance platform.

[0032] Next, connect the pull rod 2 to the transition connector 3. Place the pull rod lug 202 at one end of the pull rod 2 into the pull rod lug mounting position 3012 formed by the saddle plate 301 of the transition connector 3, so that the pull rod lug hole 2021 is aligned with the pull rod mounting pin hole 3011 on the saddle plate 301, insert the pin and lock it.

[0033] Finally, the tensioning part 4 is connected. In this embodiment, the tensioning part 4 uses a turnbuckle 41. The screw ring 411 at one end of the turnbuckle 41 is hinged to the pull rod ear plate 202 at the upper end of the pull rod 2, and the screw ring 411 at the other end is hinged to the column ear plate 103 at the upper end of the column support 1. The connection is completed by inserting a pin and locking it.

[0034] After all components are installed in place, the effective length of the tie rod 2 is shortened by rotating the turnbuckles 41 on both the front and rear sides, thereby applying an upward preload to the cantilevered walkway of the maintenance platform, causing it to tilt slightly upward. This preload can significantly counteract the load during operation, greatly improving the stability and load-bearing capacity of the cantilevered walkway.

[0035] It should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. For example, the tensioning part is not limited to turnbuckles; any rigid component capable of length adjustment and force transmission can be used. The pin connection can also be replaced by a high-strength bolt connection. The material of the tie rod body can be shaped steel or solid bar. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tie rod device for an aerial work platform, characterized in that, include: The column support is vertically installed on the bottom beam of the platform; Transition connectors; A tie rod, which is connected to the platform bottom beam via the transition connector; The tensioning part connects the tie rod to the upper end of the column support. The column positioning groove is located on the bottom beam of the platform.

2. The aerial work platform tie rod device according to claim 1, characterized in that, The column support includes two main column members on the left and right, a column crossbeam connecting the two main column members, and a column ear plate disposed on the column crossbeam near the upper end; the column ear plate is provided with a column ear plate pin hole.

3. The aerial work platform tie rod device according to claim 1, characterized in that, The transition connector includes a saddle plate and a fixed lug plate; the saddle plate is provided with a tie rod mounting pin hole for connecting with the tie rod; the fixed lug plate is provided with a fixing hole for connecting with a fixing seat on the platform bottom beam.

4. The aerial work platform tie rod device according to claim 1, characterized in that, The pull rod includes a pull rod body and pull rod lugs disposed at both ends of the pull rod body, and the pull rod lugs are provided with pull rod lug holes.

5. The tie rod device for an aerial work platform according to claim 1, characterized in that, The tensioning part is a turnbuckle, and the turnbuckle has lead screw rings at both ends.

6. The tie rod device for an aerial work platform according to claim 1, characterized in that, The column positioning groove is provided with column positioning groove pin holes on both sides.

7. The aerial work platform tie rod device according to claim 2, characterized in that, The lower end of the main column is provided with a column positioning pin hole. The pin shaft passes through the column positioning groove pin hole and the column positioning pin hole to realize the column support and the column positioning groove for installation and fixation.

8. The tie rod device for an aerial work platform according to claim 1, characterized in that, The transition connector includes a saddle plate and a fixed lug plate; the saddle plate has a tie rod mounting pin hole for connecting to the tie rod; the fixed lug plate has a fixing hole for connecting to the fixing seat on the platform bottom beam; the tie rod includes a tie rod body and tie rod lug plates disposed at both ends of the tie rod body; the tie rod lug plates have tie rod lug plate holes; the saddle plate consists of two pieces, and a tie rod lug plate mounting position is formed between the two saddle plates to accommodate the tie rod lug plates; the fixed lug plate consists of two pieces, and a fixing seat mounting position is formed between the two fixed lug plates to accommodate the fixing seat on the platform bottom beam.

9. The tie rod device for an aerial work platform according to claim 4, characterized in that, The tie rod is divided into a front tie rod located on the front side of the column support and a rear tie rod located on the rear side of the column support.

10. The aerial work platform tie rod device according to claim 5, characterized in that, The screw ring at one end of the turnbuckle is hinged to the pull rod lug at the upper end of the pull rod via a pin, and the screw ring at the other end is hinged to the column lug on the column support via a pin.

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