Slow descent device special for maintenance of draft tube of medium-large hydropower station

Abstract

The utility model relates to the technical field of hydropower station equipment, in particular to a slow descending device special for maintenance of draft tubes of medium and large hydropower stations, which mainly comprises a support column, a first support portion and a second support portion. The first supporting part and the second supporting part are arranged on the two sides of the supporting column respectively, a fixed pulley is arranged at the end, away from the supporting column, of the first supporting part, and a manual winch is detachably arranged at the end, away from the supporting column, of the second supporting part. Based on the structure, the rope is perpendicularly stressed through the design of the supporting column and the fixed pulley, the supporting column is fixedly installed on the draft tube mandoor frame through the through hole in the supporting column and a bolt, and installation is convenient and fast; the maximum load of the manual winch can reach 500kg, and meanwhile, the manual winch has a self-locking function and can stop at any time in the midway, so that the safety is greatly improved while the work is convenient. The use of a ladder stand is avoided, time and labor are saved, and the round-trip time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station equipment technology, and more specifically, to a special slow descent device for the maintenance of tailrace pipes in medium and large-sized hydropower stations. Background Technology

[0002] The tailrace is an important component of the hydro-turbine generator set. Its main function is to smoothly guide the water flow from the turbine outlet to the downstream. At the same time, it uses the elevation difference between the downstream water level and the turbine outlet to create a static vacuum at the turbine outlet, reducing the kinetic energy loss at the turbine outlet and thus improving the turbine efficiency.

[0003] Currently, almost all large and medium-sized hydropower stations use elbow-shaped draft tubes. Elbow-shaped draft tubes consist of conical sections, bends, and diffusers, and come in various shapes and sizes. Research shows that increasing the height and length of the draft tube can improve turbine efficiency, with increasing the height being far more effective than increasing the length. As the draft tube height increases, personnel often need to descend tens of meters to reach their work positions, posing new challenges to draft tube installation and maintenance.

[0004] Currently, existing technology requires personnel to climb the ladder themselves, which is time-consuming and laborious, taking 4-5 hours for a round trip. The ladder is also not easy to secure, posing significant safety hazards to the operation. Utility Model Content

[0005] The purpose of this invention is to provide a special slow descent device for the maintenance of tailrace pipes in medium and large-sized hydropower stations, in order to solve the problems of low efficiency and high safety hazards caused by the need for manual ladder climbing in the current technology.

[0006] This utility model is achieved through the following technical solution:

[0007] A special slow descent device for maintenance of tailrace pipe in medium and large-sized hydropower stations includes a support column, a first support part, and a second support part. The first support part and the second support part are respectively disposed on both sides of the support column. A fixed pulley is provided at the end of the first support part away from the support column, and a manual winch is detachably disposed at the end of the second support part away from the support column. The steel wire rope in the manual winch rolls on the fixed pulley, and one end of the rope is connected to a hook for connecting with the operator. Through holes are opened at both ends of the support column, and the through holes are used to fix the support column to the tailrace pipe inlet gate frame by bolts.

[0008] Preferably, the first support portion includes a first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the support column, and the other end is provided with the fixed pulley. One end of the second connecting rod is connected to the support column, and the other end is connected to the middle part of the first connecting rod.

[0009] Preferably, the second support part includes a third link and a fourth link. One end of the third link is connected to the support column, and the other end is provided with the manual winch. One end of the fourth link is connected to the support column, and the other end is connected to the middle part of the first link.

[0010] Preferably, a connecting plate is provided at the end of the third link away from the support column, one side of the connecting plate is fixedly connected to one end of the third link, and the connecting plate is provided with a plurality of threaded holes for the installation of a manual winch.

[0011] Preferably, the first connecting rod includes a movable rod and a fixed rod. One end of the movable rod moves within the fixed rod, and the other end is connected to the fixed pulley. Both the movable rod and the fixed rod have several through holes. The movable rod is detachably connected to the fixed rod through bolts and through holes. One end of the fixed rod is connected to the support column.

[0012] Preferably, it also includes an infrared camera device, which includes an infrared camera and a display. The infrared camera is disposed at one end of the movable rod, and the display is electrically connected to the infrared camera and disposed on the support column.

[0013] Preferably, a reinforcing rib is also provided between the connecting plate and the third connecting rod.

[0014] Preferably, the second support portion is inclined.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0016] The structure provided by this utility model mainly includes a support column, a first support part, and a second support part. The first support part and the second support part are respectively disposed on both sides of the support column. A fixed pulley is provided at the end of the first support part away from the support column, and a manual winch is detachably disposed at the end of the second support part away from the support column. Based on the above structure, the support column and fixed pulley design achieve vertical force on the rope. The support column is fixed to the tailwater pipe inlet door frame with bolts through the through holes on the support column, making installation convenient and quick. The manual winch has a maximum load of 500kg and also has a self-locking function, allowing for stopping midway, which facilitates work and greatly improves safety. It avoids the use of ladders, saving time and effort and significantly reducing round-trip time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a front view of the support rod of this utility model;

[0020] Figure 3 This is a top view of the third link of this utility model.

[0021] Icons: 1- Fixed pulley, 2- Fixed rod, 3- Support rod, 4- Third link, 5- Manual winch, 6- Connecting plate, 7- Fourth link, 8- Second link, 9- Infrared camera, 10- Display. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Please refer to Figures 1-3 This utility model provides a special slow descent device for the maintenance of tailrace pipes of medium and large-sized hydropower stations, including a support column, a first support part and a second support part, with the first support part and the second support part respectively disposed on both sides of the support column.

[0024] The support column is a rectangular column structure, which can be hollow or solid to strengthen the structure, but this would make the overall structure heavier and less portable. The first and second support parts are basically similar in structure. The first support part is set perpendicular to the support column, and the second support part is set slightly at an angle. The first support part is used to support the weight of the operator, and the second support part is used to set the manual winch 5. The manual winch 5 used in this embodiment has a load capacity of 500KG.

[0025] Specifically, a fixed pulley 1 is provided at the end of the first support part away from the support column, and a manual winch 5 is detachably provided at the end of the second support part away from the support column. The steel wire rope in the manual winch 5 rolls on the fixed pulley 1, and one end of it is connected to a hook for connecting with the operator. Through holes are opened at both ends of the support column, and the through holes are used to fix the support column to the tailwater pipe inlet door frame with bolts.

[0026] The structure provided by this utility model mainly includes a support column, a first support part, and a second support part. The first support part and the second support part are respectively arranged on both sides of the support column. A fixed pulley 1 is provided at the end of the first support part away from the support column, and a manual winch 5 is detachably provided at the end of the second support part away from the support column. Based on the above structure, the support column and the fixed pulley 1 are designed to achieve vertical force on the rope. The support column is fixed to the tailwater pipe inlet door frame with bolts through the through holes on the support column, making installation convenient and quick. The manual winch 5 has a maximum load of 500kg and also has a self-locking function, which can be stopped midway, making work convenient and greatly improving safety. It avoids the use of ladders, saving time and effort, and greatly shortening the round trip time. One round trip only takes about 30 minutes, which is reduced to 1 / 10 of the original solution.

[0027] In one exemplary embodiment of this utility model, the first support part includes a first connecting rod and a second connecting rod 8. One end of the first connecting rod is connected to a support column, and the other end is provided with a fixed pulley 1. One end of the second connecting rod 8 is connected to the support column, and the other end is connected to the middle part of the first connecting rod.

[0028] The second support section includes a third link 4 and a fourth link 7. One end of the third link 4 is connected to a support column, and the other end is equipped with a manual winch 5. One end of the fourth link 7 is connected to the support column, and the other end is connected to the middle of the first link.

[0029] Among them, the third link 4 and the fourth link 7 both serve to strengthen the overall structure.

[0030] In one exemplary embodiment of this utility model, a connecting plate 6 is provided at the end of the third connecting rod 4 away from the support column. One side of the connecting plate 6 is fixedly connected to one end of the third connecting rod 4. Several threaded holes are provided on the connecting plate 6 for the installation of the manual winch 5. Reinforcing ribs are also provided between the connecting plate 6 and the third connecting rod 4.

[0031] In one exemplary embodiment of this utility model, the first connecting rod includes a movable rod and a fixed rod 2. One end of the movable rod moves within the fixed rod 2, and the other end is connected to a fixed pulley 1. Both the movable rod and the fixed rod 2 have several through holes. The movable rod is detachably connected to the fixed rod 2 through bolts and through holes. One end of the fixed rod 2 is connected to a support column.

[0032] To allow workers to choose different landing points, the first connecting rod is designed as a telescopic structure, allowing workers to select different ranges in the horizontal direction. When in use, after selecting the position of the movable rod, it is fixed by bolts passing through the through holes on the movable rod and the fixed rod 2. To enhance strength, the movable rod can be made of solid structure, and the fixed rod 2 is made of thicker steel.

[0033] An exemplary embodiment of this utility model also includes an infrared camera device, which includes an infrared camera 9 and a display 10. The infrared camera 9 is disposed at one end of the movable rod, and the display 10 is electrically connected to the infrared camera 9 and disposed on the support column.

[0034] When working downhill at the tailpipe inlet, the lighting may not be good. In this case, the infrared camera 9 can be used to know the current situation of the workers going downhill and display it on the monitor 10 so that the dynamics of the workers can be understood in real time.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A special slow descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations, characterized in that, It includes a support column, a first support part and a second support part. The first support part and the second support part are respectively disposed on both sides of the support column. The first support part is provided with a fixed pulley (1) at the end away from the support column. The second support part is detachably provided with a manual winch (5) at the end away from the support column. The wire rope in the manual winch (5) rolls on the fixed pulley (1). One end of the winch is connected to a hook for connecting with the operator. The two ends of the support column are respectively provided with through holes. The through holes are used to fix the support column to the tailwater pipe inlet door frame by bolts.

2. The special slow descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 1, characterized in that, The first support part includes a first connecting rod and a second connecting rod (8). One end of the first connecting rod is connected to the support column, and the other end is provided with the fixed pulley (1). One end of the second connecting rod (8) is connected to the support column, and the other end is connected to the middle part of the first connecting rod.

3. A special slow-descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 2, characterized in that, The second support includes a third link (4) and a fourth link (7). One end of the third link (4) is connected to the support column, and the other end is provided with the manual winch (5). One end of the fourth link (7) is connected to the support column, and the other end is connected to the middle part of the first link.

4. A special slow descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 3, characterized in that, A connecting plate (6) is provided at one end of the third link (4) away from the support column. One side of the connecting plate (6) is fixedly connected to one end of the third link (4). Several threaded holes are provided on the connecting plate (6), and the threaded holes are used for the installation of the manual winch (5).

5. A special slow descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 4, characterized in that, The first connecting rod includes a movable rod and a fixed rod (2). One end of the movable rod moves within the fixed rod (2), and the other end is connected to the fixed pulley (1). Both the movable rod and the fixed rod (2) have several through holes. The movable rod is detachably connected to the fixed rod (2) by bolts and through holes. One end of the fixed rod (2) is connected to the support column.

6. A special slow-descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 5, characterized in that, It also includes an infrared camera device, which includes an infrared camera (9) and a display (10). The infrared camera (9) is located at one end of the movable rod, and the display (10) is electrically connected to the infrared camera (9) and is located on the support column.

7. A special slow descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to claim 6, characterized in that, A reinforcing rib is also provided between the connecting plate (6) and the third connecting rod (4).

8. A special slow-descent device for maintenance of tailrace pipes in medium and large-sized hydropower stations according to any one of claims 1-7, characterized in that, The second support is inclined.

Images