Pressure steel pipe welding seam overhaul bearing platform system and using method

Abstract

The invention relates to the technical field of pressure steel pipe maintenance equipment, and provides a pressure steel pipe welding seam maintenance bearing platform system and a using method.The pressure steel pipe welding seam maintenance bearing platform system comprises a hoisting mechanism installed on the ground and a fixing structure installed at an inlet of a diversion tunnel; the first deflecting pulley is arranged on the fixing structure, the bearing mechanism is arranged in the pressure steel pipe, one end of the steel wire rope is connected with the bearing mechanism, and the other end of the steel wire rope bypasses the first deflecting pulley, vertically penetrates through a bulkhead gate groove upwards and then is connected with a hoisting mechanism. The hoisting mechanism can pull the bearing mechanism to move in the pressure steel pipe through a steel wire rope. The device can conveniently overhaul the inclined section of the pressure steel pipe, is suitable for overhauling the inclined section and the horizontal section at the same time, and improves the overhauling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure steel pipe maintenance equipment, and in particular to a pressure steel pipe weld maintenance bearing platform system and a use method thereof. Background Art

[0002] As an important water-carrying and pressure-bearing component of a hydropower station, the penstock is the core focus of hidden danger inspection. The traditional penstock weld flaw detection and repair construction method is to set up a scaffolding platform, hang the scaffolding platform into the penstock, and the maintenance personnel stand on the scaffolding platform to perform maintenance work. However, the penstocks of some hydropower stations are Figure 1 As shown, it has an inclined section and a horizontal section. The traditional scaffolding platform is suitable for the maintenance of the horizontal section. For the inclined section, due to the inclination of the pipe wall, the traditional scaffolding platform cannot meet the maintenance needs of the inclined section. Summary of the invention

[0003] In order to solve the above technical problems, the present invention designs a pressure steel pipe weld maintenance bearing platform system and a use method.

[0004] The present invention is realized by the following technical scheme: a penstock weld inspection and maintenance bearing platform system, comprising a hoisting mechanism installed on the ground, a fixed structure installed at the inlet of a water diversion tunnel, a first diverting pulley arranged on the fixed structure, a bearing mechanism arranged in the penstock, and a steel wire rope connected to the hoisting mechanism at one end and bypassing the first diverting pulley and passing vertically upward through a gate slot of an inspection gate at the other end; the hoisting mechanism can pull the bearing mechanism to move in the penstock through the steel wire rope; The bearing mechanism includes two inverted triangular support frames arranged in parallel, an inclined section maintenance bearing platform installed on the top of the two inverted triangular support frames, and rollers installed on the two inverted triangular support frames respectively; when the bearing mechanism moves along the inclined section of the pressure steel pipe, the inclined section maintenance bearing platform maintains a horizontal state, and the rollers are in contact with the lower half of the pressure steel pipe.

[0005] Furthermore, the inverted triangle support frame includes a first diagonal brace, a second diagonal brace and a top horizontal reinforcement rib which are interconnected and form an inverted triangle shape; the inclined section maintenance bearing platform is installed on the top horizontal reinforcement ribs of the two inverted triangle support frames, and the roller is arranged on the first diagonal brace.

[0006] The inclined section maintenance support platform includes a first support platform, a second support platform and a third support platform respectively installed on the top of two inverted triangle support frames; the heights of the first support platform, the second support platform and the third support platform increase successively to form a staircase shape between the first support platform, the second support platform and the third support platform.

[0007] A horizontal-section maintenance and load-bearing platform is also connected between the two inverted triangular support frames. When the load-bearing mechanism moves from the inclined section of the penstock to the horizontal section, the horizontal-section maintenance and load-bearing platform switches from an inclined state to a horizontal state.

[0008] The horizontal-section maintenance and load-bearing platform includes a fourth load-bearing platform, a fifth load-bearing platform, and a sixth load-bearing platform; the heights of the fourth load-bearing platform, the fifth load-bearing platform, and the sixth load-bearing platform decrease in sequence, so that the fourth load-bearing platform, the fifth load-bearing platform, and the sixth load-bearing platform are in a staircase shape.

[0009] A rotating shaft located below the inclined-section maintenance and load-bearing platform is also connected between the two inverted triangular support frames. A hanging basket is arranged on the rotating shaft. When the load-bearing mechanism moves in the penstock, the hanging basket always maintains a vertical state under its own gravity; manholes are arranged on both the inclined-section maintenance and load-bearing platform and the horizontal-section maintenance and load-bearing platform, and covers are arranged on the manholes.

[0010] A driving mechanism for driving the rollers to rotate is arranged on the load-bearing mechanism.

[0011] The fixing structure includes a cross-shaped steel plate and fixing columns arranged on the cross-shaped steel plate; the cross-shaped steel plate is fixed at the entrance of the water diversion tunnel, the fixing columns extend towards the penstock, and the first turning pulley is installed at the end of the fixing column.

[0012] A using method of a penstock weld maintenance and load-bearing platform system uses the above penstock weld maintenance and load-bearing platform system to maintain the penstock, and includes the following steps: (A) Set up the penstock weld maintenance and load-bearing platform system, and make the load-bearing mechanism located at the entrance of the inclined section of the penstock, and the maintenance personnel climb onto the inclined-section maintenance and load-bearing platform; (B) Control the hoisting mechanism to work, so that the load-bearing mechanism slowly moves down along the inclined section of the penstock. When the load-bearing mechanism moves to a weld position each time, the hoisting mechanism stops working, and the maintenance personnel maintain the welds in the inclined section on the inclined-section maintenance and load-bearing platform; (C) When the load-bearing mechanism moves to the end of the inclined section, control the hoisting mechanism to stop working. The maintenance personnel open the cover on the inclined-section maintenance and load-bearing platform and enter the hanging basket through the manhole on the inclined-section maintenance and load-bearing platform; (D) Restart the hoisting mechanism, and the load-bearing mechanism slowly enters the horizontal section from the inclined section of the penstock. At this time, the maintenance personnel open the cover on the horizontal-section maintenance and load-bearing platform and climb onto the horizontal-section maintenance and load-bearing platform; (E) Control the driving mechanism to work, so that the load-bearing mechanism slowly moves along the horizontal section of the penstock. When the load-bearing mechanism moves to a weld position each time, the driving mechanism stops working, and the maintenance personnel maintain the welds in the horizontal section on the horizontal-section maintenance and load-bearing platform.

[0013] Further, in step (D), after the carrying mechanism enters the horizontal section from the inclined section of the penstock, the wire rope is disengaged from the carrying mechanism.

[0014] Compared with the prior art, the embodiment of the present application has the following beneficial effects: The present invention can conveniently repair the inclined section of the penstock, and is applicable to the repair of both the inclined section and the horizontal section at the same time, improving the repair efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute a limitation to the present application. In each figure, the same reference numerals represent the same components. Among them, Figure 1 is a schematic diagram of the penstock.

[0016] Figure 2 is a schematic diagram when the present invention is installed inside the penstock.

[0017] Figure 3 is a schematic structural diagram of the present invention when the horizontal section repair carrier platform is not provided on the carrying mechanism.

[0018] Figure 4 is a top view of the inclined section repair carrier platform of the present invention.

[0019] Figure 5 is Figure 2 an enlarged schematic diagram of part A in

[0020] Figure 6 is a schematic structural diagram of the fixing structure of the present invention.

[0021] Figure 7 is a schematic structural diagram of the present invention when the horizontal section repair carrier platform is provided on the carrying mechanism.

[0022] Figure 8 is a schematic diagram of the carrying mechanism of the present invention entering the horizontal section from the inclined section of the penstock.

[0023] Figure 9 is Figure 8 an enlarged schematic diagram of part B in

[0024] Figure 10 is Figure 8 an enlarged schematic diagram of part C in

[0025] The reference numerals in the above-mentioned drawings are as follows: 1-inspection gate slot, 2-fixed structure, 3-first steering pulley, 4-second steering pulley, 5-bearing mechanism, 6-first diagonal brace, 7-second diagonal brace, 8-middle horizontal reinforcement rib, 9-vertical reinforcement rib, 10-top horizontal reinforcement rib, 11-first bearing platform, 12-second bearing platform, 13-third bearing platform, 14-supporting rod, 15-roller, 16-pressure steel pipe, 17-steel wire rope, 18-manhole, 19-cross steel plate, 20-fixed column, 21-fourth bearing platform, 22-fifth bearing platform, 23-sixth bearing platform, 24-basket, 25-rotating shaft. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0027] It should be noted that if the terms "first", "second", etc. are involved in the description, claims and above-mentioned drawings of this application, they are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described here. In addition, if the terms "including" and "having" and any variations thereof are involved, the intention is to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] In this application, if terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are involved, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0030] In addition, in this application, the terms "installed", "set", "provided with", "connected", "connected", "socketed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Example like Figure 2 As shown, this embodiment discloses a pressure steel pipe weld maintenance bearing platform system, which includes a hoisting mechanism installed on the ground, a fixed structure 2 installed at the inlet of the water diversion tunnel, a first diverting pulley 3 arranged on the fixed structure 2, a bearing mechanism 5 arranged in the pressure steel pipe 16, and a steel wire rope 17 with one end connected to the bearing mechanism 5 and the other end bypassing the first diverting pulley 3 and vertically passing through the maintenance gate slot 1 upwards and then connected to the hoisting mechanism.

[0033] The hoisting mechanism can pull the carrying mechanism 5 to move in the pressure steel pipe 16 through the wire rope 17; specifically, the hoisting mechanism includes a motor, a reduction box, a drum, a brake, a controller and other devices, one end of the wire rope 17 is wound on the drum, and the motor drives the drum forward and reversely to retract and release the wire rope 17, thereby realizing the traction of the carrying mechanism 5 to move in the pressure steel pipe 16. The hoisting mechanism belongs to the existing mature technology, and its structure and working principle are not repeated. In this embodiment, the hoisting mechanism is set on the ground for easy maintenance.

[0034] The diversion tunnel is used to install the pressure steel pipe 16, such as Figure 6As shown in the figure, the fixing structure 2 includes a cross-shaped steel plate 19 and fixing columns 20 arranged on the cross-shaped steel plate 19. During installation, the cross-shaped steel plate 19 is stuck at the inlet of the diversion tunnel, and the fixing columns 20 extend towards the penstock 16. The first turning pulley 3 is installed at the end of the fixing column 20. The steel wire rope 17 passes around the first turning pulley 3, then passes upward from the vertical maintenance gate slot 1 to the ground and is connected to the hoisting mechanism on the ground. The first turning pulley 3 plays a guiding role, which can convert the inclined tension of the steel wire rope 17 into a vertically upward tension. In specific implementation, a second turning pulley 4 can also be arranged at the inlet of the penstock 16, and the steel wire rope 17 passes around the second turning pulley 4.

[0035] As Figure 3 , 4 shown in the figure, the carrying mechanism 5 includes two inverted triangular support frames arranged in parallel, an inclined-section maintenance carrying platform installed at the tops of the two inverted triangular support frames, and rollers 15 respectively installed on the two inverted triangular support frames. When the hoisting mechanism controls the carrying mechanism 5 to move within the inclined section of the penstock 16, under the action of the self-weight of the carrying mechanism 5, the rollers 15 are in contact with the lower half of the penstock 16, as Figure 3 shown in the figure. In addition, the laying angle of the inclined-section maintenance carrying platform needs to meet the requirement that when the carrying mechanism 5 moves within the inclined section of the penstock 16, the inclined-section maintenance carrying platform always remains horizontal, as Figure 3 shown in the figure. In this way, when the carrying mechanism 5 moves along the inclined section, maintenance personnel can stand on the inclined-section maintenance carrying platform to maintain the welds within the inclined section, as Figure 5 shown in the figure.

[0036] As Figure 3 shown in the figure, the inverted triangular support frame includes a first diagonal brace 6, a second diagonal brace 7 and a top horizontal reinforcing rib 10 that are connected to each other to form an inverted triangular shape. The inclined-section maintenance carrying platform is installed on the top horizontal reinforcing ribs 10 of the two inverted triangular support frames, and the rollers 15 are arranged on the first diagonal brace 6; that is, both ends of the inclined-section maintenance carrying platform are respectively installed on the top horizontal reinforcing ribs 10 of the two inverted triangular support frames.

[0037] In addition, a connecting middle horizontal reinforcing rib 8 is provided between the first diagonal brace 6 and the second diagonal brace 7, and a vertical reinforcing rib 9 is connected between the top horizontal reinforcing rib 10 and the middle horizontal reinforcing rib 8. The stability of the inverted triangular support frame can be increased by the action of the middle horizontal reinforcing rib 8 and the vertical reinforcing rib 9. Correspondingly, a reinforcing rib can also be connected between the two inverted triangular support frames to improve the stability between the two inverted triangular support frames.

[0038] As Figure 3As shown in the figure, the inspection and maintenance support platform for the inclined section includes a first support platform 11, a second support platform 12, and a third support platform 13, which are respectively installed on the tops of two inverted triangular support frames. During specific installation, both ends of the second support platform 12 and the third support platform 13 are installed on the top horizontal reinforcement ribs 10 of the two inverted triangular support frames through support rods 14 with different lengths, so that the heights of the first support platform 11, the second support platform 12, and the third support platform 13 increase in sequence, forming a staircase shape between the first support platform 11, the second support platform 12, and the third support platform 13. Since the inclined section of the penstock 16 is inclined, the welds between pipe sections are on an inclined plane. In other words, the circumferential welds between pipe sections are in a state where one end is high and the other end is low. Coupled with the large diameter of the penstock 16, the welds located in the upper part are not easy to inspect and repair. In this embodiment, a staircase shape is formed between the first support platform 11, the second support platform 12, and the third support platform 13, and maintenance personnel can stand on different support platforms to inspect different parts of the circumferential welds, which is convenient for operation. When setting, a ladder for people to go up and down can be set between support platforms of different layers.

[0039] In addition, the edges of the first support platform 11, the second support platform 12, and the third support platform 13 can be set to be arc-shaped, so that the projections of the first support platform 11, the second support platform 12, and the third support platform 13 form a circle to better match the shape of the penstock 16. In this way, maintenance personnel can inspect the penstock 16 in all directions when standing on the inspection and maintenance support platform for the inclined section, as Figure 4 shown. When setting, the size of the inspection and maintenance support platform for the inclined section needs to meet the requirement that there is a certain distance between its four peripheral edges and the pipe wall of the penstock 16 to prevent the support mechanism from scratching the pipe wall when moving. However, the distance between the two cannot be too large to avoid personnel or tools falling from the gap. Specifically, it can be set to 15 - 20 CM.

[0040] In order to make this embodiment applicable to the inspection and maintenance of both the inclined section and the horizontal section of the penstock 16, as another implementation method, as Figure 7 shown, a horizontal section inspection and maintenance support platform is also connected between the two inverted triangular support frames. When the support mechanism 5 moves on the inclined section of the penstock 16, the horizontal section inspection and maintenance support platform is in an inclined state. When the support mechanism 5 moves from the inclined section of the penstock 16 to the horizontal section, the horizontal section inspection and maintenance support platform switches from an inclined state to a horizontal state, so that maintenance personnel can stand on the horizontal section inspection and maintenance support platform to inspect the welds in the horizontal section, while the inspection and maintenance support platform for the inclined section changes from a horizontal state to an inclined state.

[0041] Specifically, the horizontal-section maintenance support platform includes a fourth support platform 21, a fifth support platform 22, and a sixth support platform 23. The fourth support platform 21 and the fifth support platform 22 are respectively connected to the second diagonal brace 7 and the top horizontal reinforcement 10, and the sixth support platform 23 is connected to the second diagonal brace 7 and the middle horizontal reinforcement 8. The heights of the fourth support platform 21, the fifth support platform 22, and the sixth support platform 23 decrease in sequence, so that the fourth support platform 21, the fifth support platform 22, and the sixth support platform 23 are in a staircase shape. Maintenance personnel can maintain various parts of the welds located on the vertical plane in the horizontal section by standing on different support platforms.

[0042] In addition, a rotating shaft 25 located below the inclined-section maintenance support platform is also connected between the two inverted triangular support frames. A hanging basket 24 is arranged on the rotating shaft 25. Specifically, the rotating shaft 25 is connected between the vertical reinforcements 9 of the two inverted triangular support frames, and the rotating shaft 25 can rotate. Therefore, when the bearing mechanism 5 moves in the penstock 16, the hanging basket 24 always maintains a vertical state under its own gravity.

[0043] Correspondingly, manholes 18 are arranged on both the inclined-section maintenance support platform and the horizontal-section maintenance support platform, and covers are arranged on the manholes 18. Maintenance personnel can get into the hanging basket 24 through the manhole 18 on the inclined-section maintenance support platform, and can also get onto the horizontal-section maintenance support platform from the manhole 18 on the flat-section maintenance support platform. The cover is used to cover the manhole 18. When the cover is closed, the inclined-section maintenance support platform and the horizontal-section maintenance support platform form a complete platform, which can prevent maintenance personnel from accidentally falling from the manhole 18. The cover can be arranged on the first support platform 11 and the fifth support platform 22. The cover is provided with a bolt, and it is fixed by the bolt when it is closed. The cover can be opened from above and below. When setting, a man ladder can also be arranged on the inverted triangular support frame, so as to facilitate maintenance personnel to get from the inclined-section maintenance support platform into the hanging basket 24, and also facilitate maintenance personnel to get from the hanging basket 24 onto the horizontal-section maintenance support platform. Of course, a man ladder that facilitates maintenance personnel to get from the hanging basket 24 to the bottom of the penstock can also be arranged on the inverted triangular support frame, that is, when in the horizontal section, maintenance personnel can get on and off the bearing mechanism 5 through this man ladder.

[0044] In addition, a driving mechanism for driving the rollers 15 to rotate is arranged on the bearing mechanism 5. The driving mechanism includes devices such as a motor, a gear, and a reduction box. Through the driving mechanism, the bearing mechanism 5 can be driven to move in the horizontal section. The driving mechanism for driving the rollers to rotate to make the platform move belongs to the prior art, and its structure and working principle will not be elaborated here. When setting, the cable for supplying power to the driving mechanism can be led in from the ground, and an additional hoisting mechanism can be used to cooperate with the movement of the bearing mechanism 5 in the penstock by winding and unwinding the cable. This method is relatively common and will not be described in detail.

[0045] A method for overhauling the penstock 16 by using the above-mentioned penstock weld overhaul bearing platform system includes the following steps: (A) Set up the penstock weld overhaul bearing platform system, and make the bearing mechanism 5 located at the entrance of the inclined section of the penstock 16. The maintenance personnel carry maintenance tools through the brackets set up at the entrance of the inclined section and board the inclined section maintenance platform.

[0046] (B) Control the hoisting mechanism to work, so that the bearing mechanism 5 slowly moves down along the inclined section of the penstock 16. During the downward movement, when the bearing mechanism 5 moves to a weld position each time, control the hoisting mechanism to stop working, and the maintenance personnel overhaul the welds in the inclined section on the inclined section maintenance platform. Specifically, the ground staff can control the hoisting mechanism to work, and the ground staff and the maintenance personnel entering the penstock 16 can communicate through a walkie-talkie.

[0047] (C) After the welds in the inclined section are overhauled, when the bearing mechanism 5 moves to the end of the inclined section, at this time, the inclined section maintenance platform is still in a horizontal state, and the horizontal section maintenance platform is still in an inclined state. Control the hoisting mechanism to stop working, and then the maintenance personnel open the cover plate on the inclined section maintenance platform and enter the hanging basket 24 through the manhole 18 on the inclined section maintenance platform. Specifically, a counter can be set on the hoisting mechanism, which can record the release length of the steel wire rope. When the release length of the steel wire rope matches the length of the inclined section, the staff believes that the bearing mechanism 5 has moved to the end of the inclined section; of course, it can also be notified to the ground staff that the bearing mechanism 5 has moved to the end of the inclined section by the way of notification from the maintenance personnel.

[0048] (D) After the maintenance personnel enter the hanging basket 24, restart the hoisting mechanism. Under the action of gravity, the bearing mechanism 5 continues to move down and slowly enters the horizontal section from the inclined section of the penstock 16. At this time, the inclined section maintenance platform changes from a horizontal state to an inclined state, while the horizontal section maintenance platform changes from an inclined state to a horizontal state. During this process, the hanging basket 24 always remains in a vertical state, and the maintenance personnel can stay safely in the hanging basket, as shown in Figure 7 、 Figure 8 、 Figure 9 . Of course, during the whole overhaul process, the maintenance personnel are equipped with safety belts. When the bearing mechanism 5 enters the horizontal section, the maintenance personnel open the cover plate on the horizontal section maintenance platform and board the horizontal section maintenance platform.

[0049] (E) After the bearing mechanism 5 enters the horizontal section, control the driving mechanism to work, so that the bearing mechanism 5 slowly moves along the horizontal section of the penstock 16. When the bearing mechanism 5 moves to a weld position each time, control the driving mechanism to stop working, and the maintenance personnel overhaul the welds in the horizontal section on the horizontal section maintenance platform.

[0050] After the overhaul is completed, control the load-carrying mechanism 5 to move towards the inclined section. When the load-carrying mechanism 5 moves to the end of the horizontal section, control the driving mechanism to stop working. The maintenance personnel get off the load-carrying platform in the horizontal section and enter the hanging basket 24. Then, the hoisting mechanism pulls the load-carrying mechanism 5, so that the load-carrying mechanism 5 enters the inclined section from the horizontal section. Finally, the maintenance personnel board the inclined maintenance load-carrying platform from the hanging basket 24, and the steps are opposite to those when the load-carrying mechanism 5 enters the horizontal section from the inclined section; continue to pull the load-carrying mechanism 5 to make the load-carrying mechanism 5 return to the upper end of the penstock.

[0051] In addition, as another method, in step D, after the load-carrying mechanism 5 enters the horizontal section from the inclined section of the penstock 16, the steel wire rope 17 can be disengaged from the load-carrying mechanism 5, and the driving mechanism is used to drive the load-carrying mechanism 5 to move along the horizontal section, so as to avoid the influence of the steel wire rope when the load-carrying mechanism 5 moves along the horizontal section. When returning, when the load-carrying mechanism 5 moves to the end of the horizontal section, reconnect the steel wire rope 17 to the load-carrying mechanism 5, and then the hoisting mechanism pulls the load-carrying mechanism 5 to climb.

[0052] This embodiment can conveniently overhaul the inclined section of the penstock, and is applicable to the overhaul of both the inclined section and the horizontal section at the same time, improving the overhaul efficiency.

[0053] It should be noted that all the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for the mutually exclusive features and / or steps, can be combined in any way.

[0054] In addition, the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the description of the present invention and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A maintenance load-bearing platform system for the weld of a penstock, characterized in that, It includes a hoisting mechanism installed on the ground, a fixed structure (2) installed at the inlet of the diversion tunnel, a first turning pulley (3) arranged on the fixed structure (2), a bearing mechanism (5) arranged inside the penstock (16), and a steel wire rope (17) with one end connected to the bearing mechanism (5), the other end bypassing the first turning pulley (3) and vertically passing upward through the maintenance gate slot (1) and then connected to the hoisting mechanism; the hoisting mechanism can traction the bearing mechanism (5) to move inside the penstock (16) through the steel wire rope (17). The bearing mechanism (5) includes two inverted triangular support frames arranged in parallel, an inclined-section maintenance bearing platform installed at the tops of the two inverted triangular support frames, and rollers (15) respectively installed on the two inverted triangular support frames; when the bearing mechanism (5) moves along the inclined section inside the penstock (16), the inclined-section maintenance bearing platform remains in a horizontal state, while the rollers (15) are in contact with the lower half of the penstock (16).

2. The overhaul load-bearing platform system for the steel penstock weld according to claim 1, wherein The inverted triangular support frame includes a first diagonal brace (6), a second diagonal brace (7) and a top horizontal stiffener (10) that are connected to each other to form an inverted triangular shape; the inclined-section maintenance bearing platform is installed on the top horizontal stiffeners (10) of the two inverted triangular support frames, and the rollers (15) are arranged on the first diagonal brace (6).

3. The overhaul load-bearing platform system for the penstock weld as claimed in claim 1, wherein, The inclined-section maintenance bearing platform includes a first bearing platform (11), a second bearing platform (12) and a third bearing platform (13) respectively installed at the tops of the two inverted triangular support frames; the heights of the first bearing platform (11), the second bearing platform (12) and the third bearing platform (13) increase in sequence, so that a staircase shape is formed between the first bearing platform (11), the second bearing platform (12) and the third bearing platform (13).

4. The overhaul load-bearing platform system for the steel penstock weld as claimed in claim 1, wherein, A horizontal-section maintenance bearing platform is also connected between the two inverted triangular support frames; when the bearing mechanism (5) moves from the inclined section of the penstock (16) to the horizontal section, the horizontal-section maintenance bearing platform switches from an inclined state to a horizontal state.

5. The penstock weld repair bearing platform system according to claim 4, wherein The horizontal-section maintenance bearing platform includes a fourth bearing platform (21), a fifth bearing platform (22) and a sixth bearing platform (23); the heights of the fourth bearing platform (21), the fifth bearing platform (22) and the sixth bearing platform (23) decrease in sequence, so that a staircase shape is formed among the fourth bearing platform (21), the fifth bearing platform (22) and the sixth bearing platform (23).

6. The overhaul load-bearing platform system for the steel penstock weld according to claim 4, characterized in that A rotating shaft (25) located below the inclined-section maintenance bearing platform is also connected between the two inverted triangular support frames, and a hanging basket (24) is arranged on the rotating shaft (25); when the bearing mechanism (5) moves inside the penstock (16), the hanging basket (24) always remains in a vertical state under its own gravity; manholes (18) are arranged on both the inclined-section maintenance bearing platform and the horizontal-section maintenance bearing platform, and covers are arranged on the manholes (18).

7. The overhaul load-bearing platform system for the steel penstock weld as claimed in claim 6, wherein, A driving mechanism for driving the rollers (15) to rotate is arranged on the bearing mechanism (5).

8. The overhaul load-bearing platform system for the steel penstock weld according to claim 1, wherein The fixing structure (2) includes a cross steel plate (19) and fixing columns (20) arranged on the cross steel plate (19); the cross steel plate (19) is fixed at the inlet of the water diversion tunnel, the fixing columns (20) extend towards the penstock (16), and the first turning pulley (3) is installed at the end of the fixing column (20).

9. A method for using a maintenance load-bearing platform system for a steel penstock weld, characterized in that, Performing maintenance on the penstock (16) by using the penstock weld maintenance bearing platform system according to any one of claims 1-8, comprising the following steps: (A) Erecting the penstock weld maintenance bearing platform system and positioning the bearing mechanism (5) at the inlet of the inclined section of the penstock (16), and maintenance personnel boarding the inclined section maintenance bearing platform; (B) Controlling the winch mechanism to work, enabling the bearing mechanism (5) to slowly move down along the inclined section of the penstock (16). When the bearing mechanism (5) moves to a weld position, the winch mechanism stops working, and maintenance personnel perform maintenance on the welds in the inclined section on the inclined section maintenance bearing platform; (C) When the bearing mechanism (5) moves to the end of the inclined section, controlling the winch mechanism to stop working, and maintenance personnel opening the cover plate on the inclined section maintenance bearing platform and entering the hanging basket (24) through the manhole (18) on the inclined section maintenance bearing platform; (D) Restarting the winch mechanism, and the bearing mechanism (5) slowly enters the horizontal section from the inclined section of the penstock (16). At this time, maintenance personnel open the cover plate on the horizontal section maintenance bearing platform and board the horizontal section maintenance bearing platform; (E) Controlling the driving mechanism to work, enabling the bearing mechanism (5) to slowly move along the horizontal section of the penstock (16). When the bearing mechanism (5) moves to a weld position, the driving mechanism stops working, and maintenance personnel perform maintenance on the welds in the horizontal section on the horizontal section maintenance bearing platform.

10. The method for using the overhaul load-bearing platform system for the steel penstock welds according to claim 9, characterized in that, In step (D), after the bearing mechanism (5) enters the horizontal section from the inclined section of the penstock (16), the steel wire rope (17) is disengaged from the bearing mechanism (5).

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