Suspension type truss maintenance platform for lower guide bearing of generator
By designing a suspended truss maintenance platform, the safety risks, long construction cycles and high costs of maintenance of under-guided bearings of the water-wheel generator in the prior art are solved, and more efficient maintenance platform construction and stronger maintenance efficiency are achieved.
Patent Information
- Application Number
- CN202422151558.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In the prior art, when repairing the guide bearings of the water wheel generator, the temporarily erected scaffolding platform has problems such as safety risks, long construction cycle, high cost and complex erecting process.
A suspended truss maintenance platform is designed, with the top end fixedly connected to the bottom of the lower frame of the hydrowheel generator, and the bottom end has a gap with the ground. The main body of the ring platform is composed of the inner and outer ring support vertical poles, horizontal poles and longitudinal cross poles to form a suspended maintenance platform.
It improves the construction efficiency of the maintenance platform, reduces the time of ground sorting, saves lower space, enhances the carrying capacity of the maintenance platform, is suitable for multiple people to repair at the same time, and improves the maintenance efficiency.
Smart Images
Figure CN223018115U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of generator maintenance, and more specifically to a suspended truss maintenance platform for the lower guide bearing of a generator. Background Art
[0002] At present, when most hydropower stations maintain the lower guide bearing of a water turbine generator, a temporarily erected scaffolding platform is used for maintenance. A full hall scaffolding is formed by erecting from bottom to top on the top cover of the water turbine or on the ground, and then a temporary construction platform is erected by laying wooden boards above the scaffolding to achieve maintenance. The erection and installation of the scaffolding are usually carried out according to experience, which has great safety risks. And during the erection process, a full hall scaffolding is formed from bottom to top. The amount of work for the erection and demolition of this kind of scaffolding is large, which has a great impact on the construction period and increases the cost significantly. Summary of the Invention
[0003] In order to solve the problems and deficiencies existing in the above-mentioned prior art, the utility model provides a suspended truss maintenance platform for the lower guide bearing of a generator. The top end of the maintenance platform is fixedly connected to the bottom of the lower frame of the water turbine generator, and there is a gap between the bottom end and the ground. Compared with the conventional floor-standing structure, the suspended structure is simple and fast in the erection process, does not require too much time to arrange the ground space for the erection of the floor-standing scaffolding, and has higher erection efficiency. Moreover, the suspended structure can save the lower space for placing other equipment.
[0004] In order to achieve the above-mentioned invention purpose, the technical solution of the utility model is as follows:
[0005] The utility model provides a suspended truss maintenance platform for the lower guide bearing of a generator, which includes an annular platform main body formed by surrounding the lower frame of the water turbine generator. The top end of the annular platform main body is connected to the bottom of the lower frame of the water turbine generator, and there is a gap between the bottom end and the ground.
[0006] As a preferred solution of the utility model, the annular platform main body includes inner ring support vertical rods, outer ring support vertical rods, inner ring horizontal cross rods and outer ring horizontal cross rods. The inner ring support vertical rods and the outer ring support vertical rods are evenly distributed along the circumferential direction of the lower frame of the water turbine generator, and the top ends are fixedly connected to the bottom of the lower frame, and there is a gap between the bottom ends and the ground. The inner ring horizontal cross rods are arranged between adjacent two inner ring support vertical rods and are connected with the inner ring support vertical rods to form an inner ring structure. The outer ring horizontal cross rods are arranged between adjacent two outer ring support vertical rods and are connected with the outer ring support vertical rods to form an outer ring structure. Longitudinal horizontal cross rods are arranged between the inner ring structure and the outer ring structure, and pedals are arranged between adjacent two longitudinal horizontal cross rods.
[0007] As a preferred embodiment of the present utility model, a support horizontal rod is further provided on the inner ring support vertical rod, and the other end of the support horizontal rod abuts against the generator shaft.
[0008] As a preferred embodiment of the present utility model, the inner ring horizontal horizontal rod, the outer ring horizontal horizontal rod and the longitudinal horizontal cross rod are connected to the inner ring support vertical rod and the outer ring support vertical rod through a connection plate.
[0009] As a preferred embodiment of the present utility model, the gap between the bottom end of the annular platform main body and the ground is 1.7 - 2.2 m.
[0010] Advantages of the present utility model:
[0011] (1) The maintenance platform of the present utility model has a suspended structure. The top end of the maintenance platform is fixedly connected to the bottom of the lower frame of the water turbine generator, and there is a gap between the bottom end and the ground. Since the lower part of the suspended maintenance platform does not contact the ground, compared with the conventional floor-standing structure, the erection process is simple and fast, and it does not take too much time to arrange the ground space for the erection of the floor-standing scaffolding, and the erection efficiency is higher; moreover, the suspended structure can save the lower space for placing other equipment.
[0012] (2) When the suspended maintenance platform of the present utility model is erected, compared with the conventional floor-standing structure, the efficiency is higher, and when erecting the support vertical rods and horizontal rods of the main frame, single-person operation can be achieved.
[0013] (3) The suspended maintenance platform of the present utility model has a strong load-bearing capacity and can accommodate multiple people for simultaneous maintenance operations; maintenance personnel can move freely on the annular platform without maintenance dead corners, improving the maintenance efficiency. Description of the drawings
[0014] The foregoing and following specific descriptions of the present utility model become clearer when read in conjunction with the following drawings, in which:
[0015] Figure 1 is a top view of the overall structure of the maintenance platform of the present utility model;
[0016] Figure 2 is Figure 1 sectional view A - A in
[0017] In the figure:
[0018] 1. Annular platform main body; 2. Lower frame of water turbine generator; 3. Support horizontal rod; 4. Connection plate; 5. Vertical rod fixing piece; 101. Inner ring support vertical rod; 102. Outer ring support vertical rod; 103. Inner ring horizontal horizontal rod; 104. Outer ring horizontal horizontal rod; 105. Longitudinal horizontal rod; 106. Pedal; 107. Staircase. Detailed implementation manners
[0019] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will further illustrate the technical solutions for achieving the invention purpose of the present utility model through several specific embodiments. It should be noted that the technical solutions claimed by the present utility model include but are not limited to the following embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.
[0020] Currently, when most hydropower stations overhaul the lower guide bearing of the hydrogenerator, a temporarily erected scaffolding platform is used for the overhaul. This is achieved by erecting a scaffolding on the top cover of the water turbine and laying wooden boards above the scaffolding to build a temporary construction platform. The lower guide bearing of the hydrogenerator is located above the top cover of the water turbine in the waterwheel chamber. The overhaul height is high, the overhaul equipment is heavy. During the overhaul, construction workers need to climb on the scaffolding by hand, and the platform has no standardized safety protection structure. Moreover, the erection and installation of the scaffolding are usually carried out according to experience, posing a relatively high safety risk, and it is also not convenient for the movement of construction workers and the handling of overhaul equipment, reducing the overhaul efficiency. The traditional full hall scaffolding erected from the ground has problems such as a long construction period, high cost, and cumbersome safety protection measures during the erection process.
[0021] Based on this, the embodiment of the present utility model provides a suspended truss overhaul platform for the lower guide bearing of the generator. The top end of the overhaul platform is fixedly connected to the bottom of the lower frame of the hydrogenerator, and there is a gap between the bottom end and the ground, finally forming a suspended overhaul platform structure at the bottom of the lower frame. Since the lower part of the suspended overhaul platform does not contact the ground, compared with the conventional floor-standing structure, it does not require spending too much time arranging the ground space for the erection of the floor-standing scaffolding, and the erection efficiency is higher; moreover, the suspended structure can save the lower space for placing other equipment.
[0022] This embodiment discloses a suspended truss overhaul platform for the lower guide bearing of the generator. Refer to the attached drawings of the specification Figures 1-2As shown in the figure, the maintenance platform includes an annular platform main body 1 formed by surrounding the lower frame 2 of the hydrogenerator. The top end of the annular platform main body 1 is fixedly connected to the bottom of the lower frame 2 of the hydrogenerator, and there is a gap between the bottom end and the ground. Specifically, the annular platform main body 1 is a truss-type maintenance platform formed by combining inner ring support vertical rods 101, outer ring support vertical rods 102, inner ring transverse horizontal rods 103, outer ring transverse horizontal rods 104, longitudinal horizontal crossbars 105, pedals 106, and stairs 107. Among them, the inner ring support vertical rods 101 and the outer ring support vertical rods 102 are evenly distributed along the circumference of the lower frame 2 of the hydrogenerator, thus forming two circular structures below the lower frame, namely the inner ring structure and the outer ring structure. In the inner ring structure, inner ring transverse horizontal rods 103 are arranged between adjacent inner ring support vertical rods 101, and several inner ring transverse horizontal rods 103 tie and fix the circumferentially evenly distributed inner ring support vertical rods 101 to form a whole. Similarly, in the outer ring structure, adjacent outer ring support vertical rods 102 are tied and connected by outer ring transverse horizontal rods 104 to form a whole. Further, between the inner ring structure and the outer ring structure, they are tied and connected by longitudinal horizontal crossbars 105, and finally a truss-type maintenance platform is formed. And pedals 106 are laid between adjacent two longitudinal horizontal crossbars 105. The pedals 106 are made of a mesh steel plate structure with a locking structure, and both ends are provided with locking structures to facilitate fixing on the longitudinal horizontal crossbars 105. Further, the stairs 107 are buckled on the upper and lower inner ring transverse horizontal rods 103.
[0023] As a preferred implementation manner of this embodiment, in order not to affect the lower space, the gap between the bottom ends of the inner ring support vertical rods 101 and the outer ring support vertical rods 102 and the ground is 1.7 - 2.2 m.
[0024] As another preferred implementation manner of this embodiment, the inner ring support vertical rods 101 and the outer ring support vertical rods 102 are fixedly connected to the bottom of the lower frame 2 of the hydrogenerator through vertical rod fixing pieces with nuts. The vertical rod fixing pieces are welded in advance at the bottom of the lower frame 2 of the hydrogenerator. When erecting the maintenance platform, the support vertical rods are connected to the vertical rod fixing pieces welded at the bottom of the lower frame 2 of the hydrogenerator through the screw structures at the top ends, so as to realize the reliable connection between the entire maintenance platform and the lower frame 2 of the hydrogenerator.
[0025] As still another preferred implementation manner of this embodiment, in order to improve the overall stability of the maintenance platform, a support horizontal rod 3 is further provided on the inner ring support vertical rod 101. One end of the horizontal support rod 3 is connected to the inner ring support vertical rod 101 through a connection disk 4, and the other end abuts against the outer wall of the generator shaft, ensuring the stability of the entire maintenance platform, which can not only prevent shaking but also prevent the platform from shifting horizontally.
[0026] As another preferred implementation manner of this embodiment, connecting plates 4 are welded and fixed on the inner ring support uprights 101 and the outer ring support uprights 102, the inner ring transverse horizontal rods 103 are connected to the connecting plates 4 welded on the inner ring support uprights 101 on both sides, and the outer ring transverse horizontal rods 104 are connected to the connecting plates 4 welded on the outer ring support uprights 102 on both sides. Furthermore, both ends of the longitudinal horizontal cross rod are respectively fixedly connected to the connecting plates on the inner ring support uprights 101 and the outer ring support uprights 102.
[0027] In the above structure, the supporting vertical poles and transverse horizontal poles play the role of the main framework, and are connected and fixed by connecting plates and pins to form a whole, which ensures the strength and stability of the entire maintenance platform. At the same time, the transverse horizontal poles also play a protective role to ensure the personal safety of construction workers. The entire maintenance platform can be built with one or more layers according to needs. The construction workers first install the lower platform, and then build the upper multi-layer platform based on it, so that the platform can be built in a standardized, orderly and safe manner. The truss has good stability. The truss is reasonably arranged, and the platform plays the role of bearing weight and facilitating the movement of workers. A supporting cross bar is set at one end of the inner side of the truss, one end of which abuts on the supporting vertical pole, and the other end abuts on the generator shaft, which can prevent the maintenance platform from horizontal displacement and shaking, and further enhance the stability of the platform.
[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.
[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.
Claims
1. A suspended truss maintenance platform for a generator lower guide bearing, characterized in that: It comprises an annular platform body (1) formed around a lower frame (2) of a hydro-generator, the top of the annular platform body (1) being connected to the bottom of the lower frame (2) of the hydro-generator via a vertical rod fixing member with a nut, and a gap between the bottom end of the annular platform body (1) and the ground.
2. A suspended truss maintenance platform for a generator lower guide bearing according to claim 1, characterized in that: The annular platform body (1) comprises an inner ring support pole (101), an outer ring support pole (102), an inner ring transverse horizontal pole (103) and an outer ring transverse horizontal pole (104); the inner ring support pole (101) and the outer ring support pole (102) are evenly distributed along the circumference of the lower frame (2) of the hydro-turbine generator, and the top ends are fixedly connected to the bottom of the lower frame, and the bottom ends have a gap with the ground; the inner ring transverse horizontal pole (103) is arranged between two adjacent inner ring support poles (101), and is connected to the inner ring support poles (101) to form an inner ring structure; the outer ring transverse horizontal pole (104) is arranged between two adjacent outer ring support poles (102), and is connected to the outer ring support poles (102) to form an outer ring structure; a longitudinal horizontal pole (105) is arranged between the inner ring structure and the outer ring structure, and a pedal (106) is arranged between two adjacent longitudinal horizontal poles (105).
3. A suspended truss maintenance platform for a generator lower guide bearing according to claim 2, characterized in that: A supporting horizontal rod (3) is also provided on the inner ring supporting vertical rod (101), and the other end of the supporting horizontal rod (3) is in contact with the generator shaft.
4. A suspended truss maintenance platform for a generator lower guide bearing according to claim 2, characterized in that: The inner ring transverse horizontal rods (103), the outer ring transverse horizontal rods (104) and the longitudinal horizontal cross rods (105) are connected to the inner ring support vertical rods (101) and the outer ring support vertical rods (102) via connection plates (4).
5. A suspended truss maintenance platform for a generator lower guide bearing according to claim 1, characterized in that: The gap between the bottom end of the annular platform body (1) and the ground is 1.7-2.2 m.