Water turbine unit tail water platform erecting device

Abstract

The application discloses a water turbine set tail water platform erecting device and relates to the technical field of hydropower stations. The device comprises a ladder body, a support frame, a rotating part arranged on the support frame and used for supporting the ladder body, and a sliding groove track arranged on both sides of the ladder body. The ladder body is connected with the support frame through the rotating part. A sliding plate is arranged on both sides of the sliding groove track. A support guide rod is arranged on both sides of the sliding plate and is embedded in the sliding groove track and moves along the sliding groove track. A driving device is arranged at the output end of the support guide rod and is used for stretching the support guide rod. The driving device comprises a driver, a hydraulic cylinder and a fixing support. The fixing support is connected with the bottom of the ladder body. The hydraulic cylinder is arranged on the fixing support. The push rod end of the hydraulic cylinder is connected with the support guide rod. The device solves the risk of falling caused by stepping into the tail water door and is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of hydro-generator maintenance equipment technology, specifically to a device for erecting a tailrace platform for a hydropower station turbine unit. Background Technology

[0002] In a hydroelectric power plant, the tailrace pipe, located downstream of the turbine runner, is a key flow-guiding component, its function being to guide the water flow through the runner. The safety of the tailrace system is crucial to the safe operation of the hydroelectric power plant; therefore, the inspection of the tailrace pipe has become a key focus of major and minor maintenance operations and a routine task.

[0003] After a period of operation, hydro-generator units require maintenance, including inspection of flow-through components and tailrace cavitation treatment. Maintenance personnel must enter the tailrace cone to inspect and repair the runner's operation. This requires constructing a maintenance platform inside the tailrace. The tailrace has a diameter of 6700mm and a height of 12m. The current maintenance platform is a frame-type aluminum alloy structure, secured with bolts. The construction process is complex, requiring 14 people working together, and the entire setup takes three days to complete.

[0004] Typical tailrace pipe maintenance platforms only consider the safety and usability of the workers, while neglecting the convenience of the workers. Due to the limited space inside the tailrace pipe, and the fact that maintenance tools are generally large and heavy, it is difficult to move or reposition the maintenance platform parts inside. Existing maintenance platforms are too bulky and heavy, making them inconvenient to set up and posing risks of working at height. This causes great inconvenience to the maintenance personnel and seriously affects the construction progress and on-site management.

[0005] The most critical and dangerous step in the tailrace platform construction is manually pushing the first section of the ladder in. People must then climb the ladder to attach to other platform beams. Tailrace platform construction is classified as a Level 3 major risk maintenance project, and to my knowledge, no hydropower plant in China currently has a suitable ladder access method. When the slide is being pushed in, people enter the tailrace gate by stepping onto the ladder. The ladder has gaps in the middle, posing a risk of slipping and falling. Furthermore, there are no guardrails on either side of the ladder, making it easy for people standing on it to fall if the ladder sways. Summary of the Invention

[0006] To address the shortcomings of the existing technology, this invention provides a tailrace platform erection device for hydropower station turbine units. This maintenance platform is easy to assemble and disassemble, safe and reliable, and suitable for tailrace pipe maintenance.

[0007] The technical solution proposed in this invention is as follows:

[0008] The tailrace platform erection device for a hydroelectric power station includes:

[0009] The ladder itself,

[0010] A support frame is provided at the bottom of the ladder body to support the ladder body. A rotating component is provided on the support frame, and the ladder body is connected to the support frame through the rotating component.

[0011] The slide rails are provided on both sides of the ladder body;

[0012] A skateboard, wherein support guide rods are provided on both sides of the skateboard, and the support guide rods are embedded in the slide rail and move along the slide rail;

[0013] A driving device, the output end of which is connected to a support guide rod for stretching the support guide rod;

[0014] The driving device includes a driver, a hydraulic cylinder, and a fixed bracket. The fixed bracket is connected to the bottom of the ladder body, the hydraulic cylinder is mounted on the fixed bracket, and the push rod end of the hydraulic cylinder is connected to the support guide rod.

[0015] As a further technical solution of the present invention, a flat plate is provided on the ladder body, and guardrail insertion holes are provided on both sides of the ladder body.

[0016] As a further technical solution of the present invention, a slot is provided at the bottom of the ladder body to facilitate contact with the ground and prevent backward sliding.

[0017] As a further technical solution of the present invention, the ladder body includes a fixed ladder and a telescopic ladder. The fixed ladder is connected to a rotating component. The bottom of the telescopic ladder is provided with a slider. The upper side of the fixed ladder is provided with a sliding groove. The telescopic ladder moves along the sliding groove by embedding the slider into the sliding groove.

[0018] As a further technical solution of the present invention, a first mounting slot is provided on the sliding plate, and a second mounting slot is provided on the flat plate.

[0019] As a further technical solution of the present invention, a connector is provided on the front side of the slide plate, and a reserved hole is provided on the connector, and a pin is provided in the reserved hole.

[0020] As a further technical solution of the present invention, the slide rail is an I-shaped slide rail structure.

[0021] As a further technical solution of the present invention, a fence is provided on the side of the skateboard, and the skateboard is provided with a hole for installing the fence.

[0022] As a further technical solution of the present invention, the driver is a manual crank.

[0023] As a further technical solution of the present invention, the driver is a control motor.

[0024] As a further technical solution of the present invention, the ladder body, the flat plate, and the sliding plate are made of aluminum alloy.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention solves the risk of people falling when entering the tailgate by stepping on a ladder;

[0027] The slide has a flat plate on the body, unlike the hollow middle of the ladder, which solves the problem of people walking and working on it. The slide plate needs to be made of load-bearing aluminum alloy.

[0028] 2. The slide has I-beam load-bearing beams on both sides, made of lightweight aluminum alloy. The operation is simple: fix the two slides and one side of the support leg to the tailrace gate, fix the upright leg to the ground, insert the processed slide into the slide and push it in to complete the work. It solves the labor problem. Each time the tailrace platform frame is set up, more than a dozen people are needed to cooperate.

[0029] 3. It reduced the risk to humans. Previously, during the construction, a rope was suspended from the shell and tied to the front of the ladder. People would push the ladder inward by hand. Once it was in place, people would climb up the ladder to hook it and then move forward. The level of danger was unimaginable, as there was a hole tens of meters high below.

[0030] 4. The improved skateboard slide allows people to enter by stepping on the skateboard and moving into the guardrail, so it is safe to say that there is no danger.

[0031] 5. The drive device reduces the workload of maintenance personnel and prevents hand pinching and other injuries when pushing the I-beam. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the tailrace platform erection device for hydroelectric power station units proposed in this invention;

[0033] Figure 2 This is a top view of the tailrace platform erection device for hydroelectric power station units proposed in this invention;

[0034] Figure 3 This is a front view of a specific embodiment of the present invention;

[0035] Figure 4 This is a top view of a specific embodiment of the present invention;

[0036] As shown in the figure:

[0037] 10-Ladder body, 20-Support frame, 30-Slide rail, 40-Slide plate, 50-Drive device;

[0038] 101-Flat plate, 102-Guardrail insertion hole, 103-Card slot, 104-Fixed ladder, 105-Telescopic ladder, 111-Second mounting slot, 141-Slide groove, 151-Slider; 201-Rotating component; 401-Support guide rod, 402-First mounting slot, 403-Connector, 404-Pin, 405-Fence, 406-Insertion hole, 431-Reserved hole; 501-Driver, 502-Hydraulic cylinder, 503-Fixed bracket. Detailed Implementation

[0039] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0040] like Figures 1 to 2 As shown, it illustrates a specific embodiment of the present invention.

[0041] The tailrace platform erection device for a hydroelectric power station includes:

[0042] Ladder body 10,

[0043] A support frame 20 is provided at the bottom of the ladder body 10 to support the ladder body 10. A rotating component 201 is provided on the support frame 20, and the ladder body 10 is connected to the support frame 20 through the rotating component 201.

[0044] The slide rail 30 is disposed on both sides of the ladder body 10;

[0045] A slide plate 40 is provided with support guide rods 401 on both sides of the slide plate 40. The support guide rods 401 are embedded in the slide rail and move along the slide rail.

[0046] A driving device 50, the output end of which is connected to a support guide rod 401 for stretching the support guide rod 401;

[0047] The driving device 50 includes a driver 501, a hydraulic cylinder 502, and a fixed bracket 503. The fixed bracket 503 is connected to the bottom of the ladder body 10. The hydraulic cylinder 502 is mounted on the fixed bracket 503, and the push rod end of the hydraulic cylinder 502 is connected to the support guide rod 401.

[0048] In this embodiment of the invention, the ladder body and the support frame serve as a fixed support. The support frame can be erected on the open ground outside the volute door. The ladder body extends from the volute door into the volute interior. A sliding plate is installed on the ladder body, allowing the operator to stand on it. The sliding plate moves along the ladder body into the volute interior via a support guide rod and a drive device. When it reaches the opposite side of the volute, the sliding plate is fixed to the volute wall. The operator can then install the support base inside the volute. The tailrace platform erection device for hydroelectric turbine units provided by this invention is easy to operate. The ladder body can rotate around the support frame via a rotating component. When the operator climbs onto the ladder body, one end of the ladder body contacts the ground, providing support. When the operator moves beyond the position of the rotating component, the ladder body rotates under gravity. At this time, the ladder body is in a parallel position. A limiting slot is also provided between the ladder body and the support frame. When the ladder body rotates to parallel, the limiting slot limits the ladder body, preventing it from continuing to rotate and ensuring its horizontal position.

[0049] By setting up a slide rail, the support guide rod connected to the slide plate is limited to ensure that the slide plate slides parallel to the ladder body. The drive device uses a hydraulic cylinder, which is easy to operate. The push rod of the hydraulic cylinder is connected to the support guide rod through a connecting rod. The support guide rod is set on the slide rail and moves along the slide rail. The slide plate is connected above the support guide rod, so that the slide plate can move above the ladder body.

[0050] In this embodiment of the invention, a flat plate 101 is provided on the ladder body 10, and guardrail insertion holes 102 are provided on both sides of the ladder body 10. By providing the flat plate, the operator is prevented from stepping into gaps on the ladder body, ensuring the operator's safety. The guardrail insertion holes on both sides of the ladder body allow the operator to insert guardrails into the insertion holes when passing through, forming a guardrail structure on the ladder body, preventing the operator from swaying and falling under the volute when walking on the ladder body.

[0051] In this embodiment of the invention, a slot 103 is provided at the bottom of the ladder body 10 to facilitate contact with the ground and prevent backward sliding.

[0052] See Figure 3 and Figure 4 To facilitate the movement and transportation of the ladder body, the ladder body is designed as a telescopic structure. When in use, the ladder body can be stretched. Specifically, the ladder body 10 includes a fixed ladder 104 and a telescopic ladder 105. The fixed ladder 104 is connected to the rotating component 201. The bottom of the telescopic ladder 105 is provided with a slider 151. The upper side of the fixed ladder 104 is provided with a slide groove 141. The telescopic ladder 105 moves along the slide groove 141 by inserting the slider 151 into the slide groove 141.

[0053] The slide plate 40 is provided with a first mounting slot 402, and the plate 101 is provided with a second mounting slot 111. Depending on the operating position, the slide plate and the plate can be fixed by inserting a pin into the first mounting slot and the second mounting slot to prevent the slide plate from sliding on the plate.

[0054] A connector 403 is also provided on the front side of the slide plate 40. The connector 403 has a reserved hole 431, and a pin 404 is provided in the reserved hole 431. The connector is used to connect with a reserved fixing part inside the volute. When the slide plate moves to the other side of the volute, the connector is aligned with the reserved fixing part of the volute, and the pin is passed through the reserved hole and fixed in place. At this time, the slide plate is connected to the volute to prevent the slide plate from shaking. The operator connects the I-beam of the bracket on the slide plate, making the construction safe and stable.

[0055] In this embodiment of the invention, the slide rail 30 is an I-shaped slide rail structure, and the support guide rod is stuck in the groove of the I-shaped slide rail structure; the side of the slide plate 40 is provided with a fence 405, and the slide plate 40 is provided with an insertion hole 406 for installing the fence 405.

[0056] In this embodiment of the invention, the driver 501 is a manual crank or a control motor, and manual operation and electric operation can be selected as needed. The invention does not limit this.

[0057] In this embodiment of the invention, the ladder body 10, the flat plate 101, and the sliding plate 40 are made of aluminum alloy. The I-beam 30 and the mounting groove are made of lightweight aluminum alloy. This design makes them lightweight and easy to install.

[0058] This invention solves the risk of people falling when entering the tailrace gate by climbing a ladder. The ladder itself has a flat plate, unlike the hollow center of a traditional ladder, eliminating the need for a load-bearing aluminum alloy slide for people to walk on it. The slide has I-beam load-bearing beams on both sides, made of lightweight aluminum alloy. Operation is simple: fix the two slides and one side of the support leg to the tailrace gate, fix the upright leg to the ground, insert the prepared slide into the slide, and push it in to complete the work. It solves the labor problem, which required more than ten people to work together each time the tailrace platform was erected. It also reduces the risk to people. Previously, during erection, a rope was suspended from the spiral casing, tied to the front of the ladder, and people pushed it in manually. Once in place, people would climb the ladder to hook it and then walk forward, a highly dangerous maneuver with a gaping hole tens of meters below.

[0059] The improved skateboard-style slide allows people to enter by stepping on the skateboard and moving into the guardrail as they go, posing virtually no danger. The drive mechanism reduces the workload for maintenance personnel and prevents hand injuries and other accidents while pushing the I-beams.

[0060] The present invention has been described in detail above, but it is not limited to the embodiments described above. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the invention. Many other changes and modifications can be made without departing from the concept and scope of the invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the invention is defined by the appended claims.

Claims

1. A device for erecting a tailrace platform for a hydropower station turbine unit, characterized in that, include: The ladder itself, A support frame is provided at the bottom of the ladder body to support the ladder body. A rotating component is provided on the support frame, and the ladder body is connected to the support frame through the rotating component. The slide rails are provided on both sides of the ladder body; A skateboard, wherein support guide rods are provided on both sides of the skateboard, and the support guide rods are embedded in the slide rail and move along the slide rail; A driving device, the output end of which is connected to a support guide rod for stretching the support guide rod; The driving device includes a driver, a hydraulic cylinder, and a fixed bracket. The fixed bracket is connected to the bottom of the ladder body, the hydraulic cylinder is mounted on the fixed bracket, and the push rod end of the hydraulic cylinder is connected to the support guide rod. The bottom of the ladder body is provided with a slot to facilitate contact with the ground and prevent backward slippage; The ladder body includes a fixed ladder and a telescopic ladder. The fixed ladder is connected to a rotating component. The bottom of the telescopic ladder is provided with a slider. The upper side of the fixed ladder is provided with a sliding groove. The telescopic ladder moves along the sliding groove by inserting the slider into the sliding groove. When the operator moves beyond the position of the rotating part, the ladder body rotates under the action of gravity. At this time, the ladder body is in a parallel position. A limit slot is also provided between the ladder body and the support frame. When the ladder body rotates to the parallel position, the limit slot limits the ladder body to prevent the ladder body from continuing to rotate and ensures that the ladder body is horizontal.

2. The tailrace platform erection device for a hydropower station turbine unit according to claim 1, characterized in that, A flat plate is provided on the ladder body, and guardrail insertion holes are provided on both sides of the ladder body.

3. The tailrace platform erection device for a hydropower station turbine unit according to claim 2, characterized in that, The sliding plate is provided with a first mounting slot, and the flat plate is provided with a second mounting slot.

4. The tailrace platform erection device for a hydropower station turbine unit according to claim 1, characterized in that, The front side of the slide plate is also provided with a connector, the connector has a reserved hole, and the reserved hole is provided with a pin.

5. The tailrace platform erection device for a hydropower station turbine unit according to claim 1, characterized in that, The slide rail is an I-shaped slide rail structure.

6. The tailrace platform erection device for a hydropower station turbine unit according to claim 1, characterized in that, The skateboard has a fence on its side, and the skateboard has holes for installing the fence.

7. The tailrace platform erection device for a hydropower station turbine unit according to claim 1, characterized in that, The driver is a manual crank or a control motor.

8. The tailrace platform erection device for a hydropower station turbine unit according to claim 2, characterized in that, The ladder body, flat plate, and sliding plate are made of aluminum alloy.

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