Air cooler exhaust valve guard for a hydroelectric generator

Abstract

The utility model discloses a kind of air cooler exhaust valve protective cover of water turbine generator, including the protective cover main body for being used to cover exhaust valve and pipeline and being half-enclosed structure, the flow guide structure for guiding the water flow of exhaust valve escaping to bottom inside protective cover main body and the mounting and fixing assembly for fixing protective cover main body on exhaust valve pipeline, the operating hole being provided in the top of protective cover main body, operating hole is used to avoid and adapt exhaust valve operating handle, mounting and fixing assembly is fixedly connected with protective cover main body and across exhaust valve pipeline realizes detachable fixing. The protective cover structure is reliable, protective cover main body uses half-enclosed structure cooperation internal flow guide structure, can effectively rapidly guide the water flow overflowing when exhausting to bottom collection point, inhibit water splash diffusion from source.

Description

Technical Field

[0001] This utility model relates to the field of hydro-generator technology, specifically to a protective cover for the exhaust valve of a hydro-generator air cooler. Background Technology

[0002] When filling the air cooler of a hydro-generator set with water, the air inside the air cooler needs to be discharged through an exhaust valve to ensure the normal operation of the cooler. In existing technology, the exhaust valve is usually directly exposed, which can easily lead to problems such as water splashing, mist diffusion, or valve leakage during the venting process. This moisture may splash onto critical electrical equipment such as the generator stator bars and iron core, causing a decrease in insulation performance, or even short circuit faults, and in severe cases, burning out the generator.

[0003] While some waterproof covers or water collection devices exist, most are complex in structure, inconvenient to install, or lack specific designs for vent valve pipelines, making it difficult to effectively prevent water splashing, mist diffusion, or valve leakage during vent valve discharge. Therefore, a protective cover structure that is simple in structure, easy to install, and can effectively prevent water splashing during venting is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a protective cover for the exhaust valve of a hydro-generator air cooler to solve the problems of water splashing and mist diffusion during the exhaust valve discharge process.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a protective cover for the exhaust valve of a hydro-generator air cooler, including a protective cover body with a semi-enclosed structure for covering the exhaust valve and pipeline, a flow guiding structure disposed inside the protective cover body for guiding the water flow escaping from the exhaust valve to the bottom, and an installation and fixing assembly for fixing the protective cover body to the exhaust valve pipeline. An operating hole is provided on the top of the protective cover body. The operating hole is used to avoid and accommodate the exhaust valve operating handle. The mounting and fixing components are fixedly connected to the protective cover body and are installed across the exhaust valve pipeline to achieve detachable fixing.

[0006] Furthermore, the mounting and fixing components include at least two sets of mounting plates and fasteners, with the mounting plates located on the inner edge of the protective cover body and below the exhaust valve pipeline; A set of mounting plates includes two mounting plate units with a gap between adjacent mounting plate units. One mounting plate unit has a through hole, and the other mounting plate unit has a screw hole. Fasteners pass through the through hole and are threaded into the screw hole for fastening.

[0007] Furthermore, the flow guiding structure is a flow guiding surface naturally formed on the side wall of the protective cover body, or at least a flow guiding plate inclinedly disposed inside the protective cover body, with the flow guiding surface or flow guiding plate inclined towards the bottom of the protective cover body.

[0008] Furthermore, at least two mounting holes are provided on the side of the protective cover body, which are used to assist in the positioning of the mounting and fixing components.

[0009] Furthermore, the main body of the protective cover has a groove-shaped structure.

[0010] Furthermore, the operating hole is a circular hole.

[0011] Furthermore, an elastic protective ring is embedded around the edge of the operating hole.

[0012] Furthermore, the length of the protective cover body is 1.4 to 1.6 times the length of the exhaust valve, and it is adapted to the outer diameter of the exhaust valve pipeline.

[0013] Furthermore, the main body of the protective cover is made of corrosion-resistant metal or engineering plastic, wherein the corrosion-resistant metal is stainless steel.

[0014] Furthermore, the distance between the inner wall of the protective cover body and the outer wall of the exhaust valve pipe is 5mm-15mm.

[0015] This utility model has the following beneficial effects: The exhaust valve protective cover for a hydro-generator air cooler provided by this utility model has a reliable structure. The main body of the protective cover adopts a semi-enclosed structure combined with an internal flow guiding structure, which can effectively guide the water overflowing during exhaust to the bottom collection point, suppressing water splash diffusion from the source. It is fixed by a mounting plate with through holes and bolts, without welding or complicated tools, and can be easily installed on existing drainage pipes, adapting to different installation environments. After the exhaust valve and pipe are covered inside the main body of the protective cover, the pipe is placed between the mounting plate and the top of the main body of the protective cover. The protective cover is fixed to the exhaust valve pipe through the mounting holes and mounting plate using fixing bolts, without the need to add other structures, simplifying the overall structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is an external side view of the present invention; Figures 1 to 3 The reference numerals in the attached drawings are respectively: 1-protective cover body, 2-mounting and fixing component, 3-operating hole, 10-mounting hole, 20-mounting plate, 21-fastener, 200-mounting plate unit. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] like Figures 1 to 3 As shown, a protective cover for the exhaust valve of an air cooler for a hydro generator includes a protective cover body 1 with a semi-enclosed structure for covering the exhaust valve and pipeline, a flow guiding structure disposed inside the protective cover body 1 for guiding the water flow escaping from the exhaust valve to the bottom, and an installation and fixing assembly 2 for fixing the protective cover body 1 to the exhaust valve pipeline. The semi-enclosed structure of the protective cover body 1 completely covers the exhaust valve and connecting pipes, forming a closed protective space. This prevents water splashing and mist diffusion during the exhaust process, avoiding moisture contact with critical electrical equipment such as the generator stator bars and core, and preventing insulation degradation or short circuit faults. Preferably, the protective cover body 1 has a channel-shaped structure and is made of corrosion-resistant metal or engineering plastic. The corrosion-resistant metal is stainless steel, which helps resist water vapor erosion during cooler exhaust, extending the service life of the protective cover, while ensuring a certain mechanical strength to prevent deformation due to vibration or external forces. The length of the protective cover body 1 is 1.4 to 1.6 times the length of the exhaust valve and is adapted to the outer diameter of the exhaust valve pipe. The distance between the inner wall of the protective cover body 1 and the outer wall of the exhaust valve pipe is 5 mm to 15 mm.

[0019] The protective cover body 1 has at least two mounting holes on its side. The mounting holes are used to assist in the positioning of the mounting and fixing components 2. The protective cover body 1 has an operating hole 3 on its top. The operating hole 3 is a circular hole with an elastic protective ring embedded on its edge. The operating hole 3 is used to avoid and adapt to the exhaust valve operating handle. The circular hole adapts to the rotation trajectory of the exhaust valve operating handle. The exhaust valve operating handle is mostly cylindrical or requires circumferential rotation. The circular hole can avoid the square / irregular hole from jamming the rotation of the handle and ensure smooth operation.

[0020] The flow guiding structure serves as a directional guide for water flow, preventing disorderly splashing of water. The flow guiding structure uses gravity to guide the water leaking / escaping from the exhaust valve to converge at the bottom of the protective cover, preventing the water flow from spreading laterally or drifting upwards along the pipeline. The inclined direction of the flow guiding structure is fixed towards the bottom, ensuring that the water flow always flows along a single path and will not form stagnation or secondary splashing inside the protective cover, further reducing the risk of water vapor contacting electrical equipment. Specifically, in this embodiment, the flow guiding structure is a flow guiding surface naturally formed on the side wall of the protective cover body 1. The flow guiding surface is inclined towards the bottom of the protective cover body 1. The flow guiding surface is directly formed by the side wall of the protective cover body 1, without the need for additional welding or assembly of flow guiding components. This integrates the protective cover body 1 and the flow guiding structure into one, which not only physically blocks splashing water flow through the side wall, but also guides water flow through the natural slope of the side wall. In addition, the contour of the flow guiding surface is completely fitted with the inner wall of the protective cover body 1, which can cover all possible overflow areas of the exhaust valve and pipeline inside the protective cover, ensuring that the water escaping from the exhaust valve can be fully captured and guided.

[0021] In another embodiment, the flow guiding structure is at least one flow guiding plate inclinedly disposed inside the main body 1 of the protective cover, with the inclined direction of the flow guiding plate facing the bottom of the main body 1 of the protective cover. When there are multiple leakage points in the exhaust valve, or when the overflow flow is large during exhaust, the flow guiding surface of the main body alone may not be able to completely guide the water flow. At this time, the inclined flow guiding plate can act as an intermediate interception layer. By using a preset inclined angle facing the bottom, it can intercept the water escaping from different locations and guide it to the same bottom area, avoiding disorderly diffusion of water flow within the protective cover. The installation position of the flow guiding plate (such as near the bottom of the exhaust valve or at the pipe joint) and the inclined angle can be adjusted according to the actual exhaust valve pipe layout (such as when there are bends in the pipe, the flow guiding plate can be inclined to adapt to the water flow direction at the bend), improving the compatibility of the entire protective cover with different installation scenarios. In addition, for high-speed overflow caused by high exhaust pressure, direct impact on the main body side wall may produce secondary splashing. The inclined flow guiding plate can buffer and slow down the water flow speed through the slope, allowing the water to flow smoothly along the flow guiding plate to the bottom, avoiding water vapor diffusion caused by water flow impact.

[0022] In this invention, the mounting and fixing assembly 2 is fixedly connected to the protective cover body 1 and spans the exhaust valve pipeline to achieve detachable fixing. The mounting and fixing assembly 2 includes at least two sets of mounting plates 20 and fasteners 21. The mounting plates 20 are located on the inner edge of the protective cover body 1 and below the exhaust valve pipeline. On the one hand, the mounting position on the inner edge can prevent the mounting plates 20 from protruding outward and interfering with other components of the generator; on the other hand, the position below the pipeline allows the mounting plates 20 to rely on the weight and support of the exhaust valve pipeline itself. After fastening, the weight of the protective cover is transferred to the pipeline through the mounting plates 20. By using the pipeline as a support base, the risk of displacement and shaking of the protective cover is greatly reduced.

[0023] A set of mounting plates 20 includes two mounting plate units 200, with a gap between adjacent mounting plate units 200. One mounting plate unit 200 has a through hole, and the other mounting plate unit 200 has a screw hole. Fasteners 21 pass through the through hole and are threaded into the screw hole for fastening. Preferably, the fasteners 21 are bolts. When the bolts pass through the through hole and are threaded into the screw hole, an axial tensile force is generated, pulling the two sets of mounting plate units 200 closer together, so that the inner side of the unit fits tightly against the outer wall of the exhaust valve pipeline. The clamping force fixes the protective cover body 1 to the pipeline as one unit, preventing the protective cover from shifting due to generator vibration or airflow impact (cooler exhaust). When it is necessary to inspect the exhaust valve or clean the inside of the protective cover, only the bolts need to be loosened to remove the protective cover body 1 from the pipeline without damaging the mounting plate 20 or the protective cover body 1. After the inspection is completed, the bolts can be tightened again. The original pipeline structure is not changed throughout the process, solving the problems of difficult welding fixation and disassembly. In addition, for exhaust valve pipelines made of different materials, the clamping force can be adjusted by controlling the tightening torque of the bolts, which ensures the stability of the protective cover and avoids pipeline deformation due to excessive clamping force, thus balancing stability and pipeline protection.

[0024] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A protective cover for the exhaust valve of an air cooler in a hydro-generator, characterized in that, It includes a protective cover body (1) for covering the exhaust valve and pipeline and having a semi-enclosed structure, a flow guiding structure located inside the protective cover body (1) for guiding the water flow escaping from the exhaust valve to the bottom, and an installation and fixing assembly (2) for fixing the protective cover body (1) to the exhaust valve pipeline. The protective cover body (1) has an operation hole (3) on its top. The operation hole (3) is used to avoid and adapt to the exhaust valve operation handle. The mounting and fixing component (2) is fixedly connected to the protective cover body (1) and spans the exhaust valve pipeline to achieve detachable fixing.

2. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 1, characterized in that, The mounting and fixing assembly (2) includes at least two sets of mounting plates (20) and fasteners (21). The mounting plates (20) are disposed on the inner edge of the protective cover body (1) and the mounting plates (20) are located below the exhaust valve pipeline. A set of mounting plates (20) includes two mounting plate units (200), with a gap between two adjacent mounting plate units (200). One mounting plate unit (200) has a through hole, and the other mounting plate unit (200) has a screw hole. The fastener (21) passes through the through hole and is threaded into the screw hole.

3. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 1, characterized in that, The flow guiding structure is a flow guiding surface naturally formed on the side wall of the protective cover body (1), or at least a flow guiding plate inclinedly disposed inside the protective cover body (1), with the flow guiding surface or flow guiding plate inclined towards the bottom of the protective cover body (1).

4. The protective cover for the exhaust valve of the air cooler of a hydro-generator according to any one of claims 1 to 3, characterized in that, The protective cover body (1) has at least two mounting holes (10) on its side, which are used to assist in the positioning of the mounting and fixing components (2).

5. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 4, characterized in that, The main body (1) of the protective cover is a groove-shaped structure.

6. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 1, characterized in that, The operating hole (3) is a circular hole.

7. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 6, characterized in that, An elastic protective ring is embedded at the edge of the operating hole (3).

8. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 1, characterized in that, The length of the protective cover body (1) is 1.4 to 1.6 times the length of the exhaust valve, and it is adapted to the outer diameter of the exhaust valve pipeline.

9. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 8, characterized in that, The main body of the protective cover is made of corrosion-resistant metal or engineering plastic, and the corrosion-resistant metal is stainless steel.

10. The protective cover for the exhaust valve of the air cooler of the hydro-generator according to claim 8, characterized in that, The distance between the inner wall of the protective cover body (1) and the outer wall of the exhaust valve pipeline is 5mm-15mm.

Images