A lower frame maintenance protection device for a large hydroelectric generator set

Abstract

This utility model discloses a maintenance and protection device for the lower frame of a large hydro-generator unit, including a support and fixing device installed on several support arms of the lower frame of the hydro-generator unit. An arc-shaped truss assembly is detachably connected to each support and fixing device. The several support arms are arranged around the lower frame of the hydro-generator unit. The arc-shaped truss assemblies on each support and fixing device can be detachably connected via connectors to form a ring-shaped channel. The device described in this application can effectively protect the lower frame during maintenance and allow passage around the entire lower frame, improving the safety of lower frame maintenance and ensuring safe maintenance operations.

Description

Technical Field

[0001] This utility model relates to the field of power station turbine generator set inspection and maintenance technology, and in particular to a large turbine generator set underframe inspection and protection device. Background Technology

[0002] The lower frame of the mixed-flow turbine generator set bears all rotating parts of the unit and plays a major supporting role in the unit. The quality of its maintenance and repair directly affects whether the unit can operate normally. The key to maintenance is to ensure that the maintenance and repair process is safe and reliable.

[0003] The lower frame of a hydroelectric generator unit in a certain power station is mainly composed of 16 inclined arms, which are separated from each other. During maintenance, it is necessary to travel around the entire lower frame. Since the lower frame is about 6 meters above the ground, the area that can be traveled around the entire frame is near the edge. The maintenance period of the entire lower frame is long, and there are many unsafe factors when traveling near the edge. Therefore, a protective device for the lower frame is designed to improve the safety and reliability of the lower frame maintenance, and improve the maintenance efficiency and safety. Utility Model Content

[0004] This utility model patent aims to address the shortcomings of the existing technology by providing a maintenance and protection device for the lower frame of a large hydro-generator unit, which solves the technical problem that the lower frame has many inclined support arms and cannot be inspected in its entirety in the existing technology.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a maintenance and protection device for the lower frame of a large hydro-generator set, characterized in that it includes a support and fixing device installed on several support arms of the lower frame of the hydro-generator set, an arc-shaped truss assembly is detachably connected to the support and fixing device, the several support arms are arranged around the lower frame of the hydro-generator set, and the arc-shaped truss assemblies on each support and fixing device are detachably connected by connectors to form an annular channel.

[0006] Preferably, the support arms of the lower frame of the hydro-generator are arranged in pairs, totaling eight groups, around the outer periphery of the lower frame of the hydro-generator unit.

[0007] Preferably, a T-shaped protrusion is provided above the end of the support arm away from the lower frame of the turbine generator set, and an L-shaped protrusion is provided below the end of the support arm away from the lower frame of the turbine generator set.

[0008] Preferably, the support and fixing device includes a support rod, which is vertically arranged, and the side of the support rod is detachably connected to the L-shaped protrusion, and the top of the support rod is detachably connected to the T-shaped protrusion.

[0009] Preferably, a cross brace is provided on the side of the support rod away from the support arm, and an arc-shaped truss assembly is installed on the top of the cross brace.

[0010] Preferably, a diagonal brace is also fixedly connected between the support rod and the cross brace.

[0011] Preferably, the arc-shaped truss components are detachably connected by bolted connectors to form an annular channel surrounding the lower frame of the hydro-generator unit.

[0012] Preferably, a guardrail is installed around the arc-shaped channel.

[0013] Preferably, the support and fixing device is made of aluminum alloy.

[0014] Preferably, the top of the arc-shaped truss assembly is covered with an alloy plate.

[0015] The beneficial effects of this utility model are:

[0016] The device described in this application can effectively protect the lower frame during maintenance, while allowing passage around the entire lower frame, improving the safety of lower frame maintenance and ensuring safe maintenance. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a top view of the safety protection device for the lower frame of this utility model;

[0019] Figure 2 This is a front view of the safety protection device for the lower frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the robotic arm and support fixing device of this utility model;

[0021] In the diagram: 1. Support arm; 2. Arc truss assembly; 3. Support rod; 4. Horizontal brace; 5. Diagonal brace; 6. Guardrail; 11. L-shaped protrusion; 12. T-shaped protrusion. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1As shown, a maintenance and protection device for the lower frame of a large hydro-generator unit is characterized by comprising support and fixing devices installed on several support arms 1 of the lower frame of the hydro-generator. An arc-shaped truss assembly 2 is detachably connected to each support and fixing device. The several support arms 1 are arranged around the lower frame of the hydro-generator unit. The arc-shaped truss assemblies 2 on each support and fixing device are detachably connected via connectors to form an annular channel. In this embodiment, during use, the support and fixing devices are first installed on the support arms 1 of each lower frame of the hydro-generator. The support and fixing devices are used to fix the arc-shaped truss assemblies 2. The arc-shaped truss assemblies 2 are a conventional technical solution in this field, typically composed of stainless steel. The structure is rectangular or arc-shaped. In this application, various arc-shaped truss components 2 installed on each support arm 1 are spliced ​​together to form a ring truss that surrounds the lower frame of the hydro generator. After installation, stainless steel plates are laid on top of the ring truss to form a ring passage. Workers can enter by climbing ladders or vehicle ladders. The maintenance and protection device for the lower frame can be arranged on the outer ring of the lower frame by a pure aluminum alloy fence or by using an aluminum alloy frame supplemented with a safety net as a fence. The fence must be fixed firmly and have sufficient strength, rigidity and stability. The fence height shall not be less than 1050mm. The lower frame cross-support arm passage is mainly made of 6061 aluminum alloy and the passage load is ≥200Kg.

[0024] Preferably, the support arms 1 of the lower frame of the hydro-generator are arranged in pairs, totaling eight groups, and are arranged around the outer periphery of the lower frame of the hydro-generator set. This application can also be used for other types of hydro-generators.

[0025] Preferably, a T-shaped protrusion 12 is provided above the end of the support arm 1 away from the lower frame of the hydro-generator unit, and an L-shaped protrusion 11 is provided below the end of the support arm 1 away from the lower frame of the hydro-generator unit. The original function of the protrusion in this application is to support the lower frame of the hydro-generator unit and to be mounted on the cement base as a load-bearing end. In this application, the protrusion structure is used as the mounting base for the support fixing device. The fixing device is fixedly connected by bolts to form a stable structure for bearing the arc truss assembly 2. The protrusion in this application is integrally formed with the support arm 1. In use, the support fixing device is installed through the protrusion on the end of the support arm 1 away from the hydro-generator unit. The side of the L-shaped protrusion in this application is connected to the side of the support rod 3 by bolts, and can also be fixedly connected by welding.

[0026] Preferably, the support and fixing device includes a support rod 3, which is vertically arranged. The side of the support rod 3 is detachably connected to the L-shaped protrusion, and the top of the support rod 3 is detachably connected to the T-shaped protrusion. In this application, the side of the support rod 3 is detachably connected to the L-shaped protrusion by bolts, and the top of the support rod 3 is detachably connected to the T-shaped protrusion by bolts.

[0027] Preferably, a cross brace 4 is provided on the side of the support rod 3 away from the support arm 1, and an arc-shaped truss assembly 2 is installed on the top of the cross brace 4. In this embodiment, the cross brace 4 is fixedly connected to the side of the support rod 3 away from the support arm 1, and the arc-shaped truss assembly 2 is installed on the top of the cross brace 4. The support rod 3 and the cross brace 4 can be connected by bolts or welding, and the arc-shaped truss assembly 2 can be installed on the top of the cross brace 4 by means of clamps, bolts, or cable ties.

[0028] Preferably, a diagonal brace 5 is also fixedly connected between the support rod 3 and the cross brace 4. In this embodiment, a diagonal brace 5 can be added between the support rod 3 and the cross brace 4 for further fixation.

[0029] Preferably, the arc-shaped truss components 2 are detachably connected by bolts to form an annular channel around the lower frame of the hydro-generator unit. In this embodiment, the two ends of the arc-shaped truss components 2 are respectively connected to the other arc-shaped truss components 2 by bolts to form an annular channel.

[0030] Preferably, a guardrail 6 is installed around the arc-shaped channel.

[0031] Preferably, the support and fixing device is made of aluminum alloy.

[0032] Preferably, the top of the arc-shaped truss assembly 2 is covered with an alloy plate.

[0033] The specific working method of this application is as follows: First, support and fixing devices are installed on each support arm 1 of the lower frame of the hydro-generator by bolts. The top of the support and fixing device is installed with an arc-shaped truss assembly 2 by bolts. The arc-shaped truss assembly 2 is connected by bolts to form a ring-shaped channel around the lower frame of the hydro-generator. Workers can enter by vehicle ladder or climbing ladder and carry out maintenance work around the lower frame of the hydro-generator.

[0034] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A large hydroelectric generator unit lower frame overhauling protection device, characterized in that, It includes a support and fixing device installed on several support arms (1) on the lower frame of the hydro-generator. An arc-shaped truss assembly (2) is detachably connected to the support and fixing device. The several support arms (1) are arranged around the lower frame of the hydro-generator. The arc-shaped truss assemblies (2) on each support and fixing device are detachably connected to form an annular channel through connectors.

2. The maintenance and protection device for the lower frame of a large hydro-generator unit according to claim 1, characterized in that: The support arms (1) of the lower frame of the hydro-generator are arranged in pairs, totaling eight groups, and are set around the outer periphery of the lower frame of the hydro-generator unit.

3. The lower bracket maintenance protection device for a large hydro-generator unit according to claim 2, characterized in that: The support arm (1) has a T-shaped protrusion (12) above the end away from the lower frame of the turbine generator set, and an L-shaped protrusion (11) below the end away from the lower frame of the turbine generator set.

4. The lower bracket maintenance protection device for a large hydro-generator unit according to claim 1, characterized in that: The support and fixing device includes a support rod (3), which is vertically arranged. The side of the support rod (3) is detachably connected to an L-shaped protrusion (11), and the top of the support rod (3) is detachably connected to a T-shaped protrusion (12).

5. The lower bracket maintenance protection device for a large hydro-generator unit according to claim 4, characterized in that: A cross brace (4) is provided on the side of the support rod (3) away from the support arm (1), and an arc-shaped truss assembly (2) is installed on the top of the cross brace (4).

6. The lower bracket maintenance protection device for a large hydro-generator unit according to claim 5, characterized in that: A diagonal brace (5) is also fixedly connected between the support rod (3) and the cross brace (4).

7. The maintenance and protection device for the lower frame of a large hydro-generator unit according to claim 1, characterized in that: The arc-shaped truss components (2) are detachably connected by bolted connectors to form an annular channel surrounding the lower frame of the hydro-generator unit.

8. The lower bracket maintenance protection device for a large hydro-generator unit according to claim 7, characterized in that: The arc-shaped passage is surrounded by guardrails (6).

9. The lower bracket maintenance protection device for a large hydroelectric generating unit according to claim 1, characterized in that: The support and fixing device is made of aluminum alloy.

10. The lower bracket maintenance protection device for a large hydroelectric generating unit according to claim 1, characterized in that: The top of the arc-shaped truss assembly (2) is covered with an alloy plate.

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