High head radial gate top water seal structure

Abstract

This invention relates to a water seal structure for a high-head arc-shaped gate, belonging to the field of metal structure technology for hydropower and water conservancy projects. The invention is installed on the gate leaf structure, which includes a stop plate, a gate leaf metal plate, and a gate leaf panel. The key feature is that the top water seal structure includes a P-shaped water seal, a rubber pad, a water seal pressure plate, and connecting components. The P-shaped water seal is installed on the gate leaf metal plate, the rubber pad is positioned between the P-shaped water seal and the gate leaf metal plate, and the water seal pressure plate is installed on the P-shaped water seal. The water seal pressure plate, P-shaped water seal, rubber pad, and gate leaf metal plate are connected and fixed together by connecting components. One end of the P-shaped water seal, rubber pad, and gate leaf metal plate is pressed against the surface of the stop plate. This invention uses the water seal pressure plate and bolts to fix the P-shaped water seal to the gate leaf metal plate. The exposed end of the water seal pressure plate has a chamfered design, which effectively reduces the contact area and friction between the water seal pressure plate and the water seal head when the P-shaped water seal rolls up.

Description

Technical Field

[0001] This utility model belongs to the field of metal structure technology for hydropower and water conservancy projects, and in particular relates to a high-head arc-shaped gate top water seal structure that effectively prevents the top water seal from rolling up. Background Technology

[0002] The selection and specific layout design of the water-stopping form of high-head arc gate is one of the core key issues in gate design. If the design is not well considered or the manufacturing and installation quality control is poor, water will be ejected from the gate gaps, causing gate vibration and cavitation damage to the embedded parts.

[0003] In relevant domestic and international standards, there is a permissible leakage range for gate water seals. Gate water seals are large-gap seals, and their operation falls between dynamic and static seals. From the sealing principle perspective, the water-stopping performance of a gate water seal is related to the contact stress and contact width between the water seal and the sealing surface, with the contact stress between the water seal and the sealing surface being the primary factor. Theoretically, the seal only works when the contact stress between the water seal and the sealing surface is greater than or equal to the gate's pressurized water head.

[0004] Generally speaking, the higher the design head of the gate, the greater the required compression of the sealing rubber and the wider the sealing surface. However, excessive water seal compression and an excessively wide sealing surface not only increase the friction of the water seal and the capacity of the hoist, but also make the water seal itself prone to wear, leading to failure and leakage, which can damage the gate and its embedded parts. Therefore, simply increasing the water seal compression and widening the sealing surface is futile and inadvisable. The practical contradiction is that, on the one hand, the higher the gate head, the more difficult it is to stop the water flow, and the greater the possibility of leakage; on the other hand, as the gate head increases, a more stringent water seal is required to prevent the water seal from failing and ensuring the safe operation of the gate.

[0005] Practice has shown that it is quite difficult to achieve a tight water seal for working gates with a design head greater than 80m (high head) using conventional water seals. In engineering projects, the top water seal of the working gate often rolls up, which can cause the gate to be unable to close or directly damage the top water seal. Summary of the Invention

[0006] The present invention aims to solve the problems existing in the top water seal structure of high-head arc gates, and provides a top water seal structure for high-head arc gates that effectively prevents the top water seal from rolling over.

[0007] This utility model relates to a high-head arc-shaped gate top water seal structure, which is installed on the gate leaf structure. The gate leaf structure includes a stop plate, a gate leaf metal plate, and a gate leaf panel. The stop plate and the gate leaf panel are vertically parallel, and the gate leaf metal plate is horizontally positioned between the stop plate and the gate leaf panel. The top water seal structure includes a P-shaped water seal, a rubber pad, a water seal pressure plate, and connecting components. The P-shaped water seal is installed on the gate leaf metal plate, the rubber pad is positioned between the P-shaped water seal and the gate leaf metal plate, and the water seal pressure plate is installed on the P-shaped water seal. The water seal pressure plate, P-shaped water seal, rubber pad, and gate leaf metal plate are connected and fixed together by connecting components. One end of the P-shaped water seal, rubber pad, and gate leaf metal plate is pressed against the surface of the stop plate. The water seal pressure plate has a countersunk hole, and the connecting components include bolts and nuts. The nuts are positioned inside the countersunk hole, and the bolts pass sequentially through the gate leaf metal plate, rubber pad, and P-shaped water seal before being connected and fixed to the nuts. The end of the water seal pressure plate near the round head of the P-shaped water seal has a chamfer.

[0008] The water seal pressure plate is provided with two chamfers, one on the top and one on the bottom. The chamfer near the P-shaped water seal has a radius of 15 mm, and the other chamfer has a radius of 3 mm.

[0009] The water seal pressure plate has a smooth arc surface at one end near the P-shaped water seal head. It has three chamfers from top to bottom, with the arc edges of two adjacent chamfers being tangent. The first chamfer has a radius of 5mm, the second chamfer has a radius of 35mm, and the third chamfer has a radius of 5mm.

[0010] The rubber pad has a notch at the angle between the door leaf metal plate and the stop plate. This notch provides a certain deformation space for the rubber pad, preventing uneven installation and gaps, and increasing installation redundancy.

[0011] This utility model relates to a high-head arc-shaped gate top water seal structure, which is simple in structure, scientifically designed, and easy to use. The P-shaped water seal is fixed to the gate leaf metal plate by a water seal pressure plate and bolts. The exposed end of the water seal pressure plate is chamfered. When the P-shaped water seal rolls up, it effectively reduces the contact area and friction between the water seal pressure plate and the water seal head, which not only improves the service life of the water seal head, but also prevents the water seal head from getting stuck and improves the sealing effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0014] Figure 3 This is a schematic diagram of the water seal pressure plate structure in Example 1.

[0015] Figure 4 This is a schematic diagram of the water seal pressure plate structure in Example 2.

[0016] Among them, P-shaped water seal 1, rubber pad 2, water seal pressure plate 3, connector 4, stop plate 5, door leaf metal plate 6, door leaf panel 7, and notch 8. Detailed Implementation

[0017] Example 1: A high-head arc-shaped gate top water seal structure is installed on the gate leaf structure. The gate leaf structure includes a stop plate, a gate leaf metal plate, and a gate leaf panel. The stop plate and the gate leaf panel are vertically parallel. The gate leaf metal plate is horizontally positioned between the stop plate and the gate leaf panel. The top water seal structure includes a P-shaped water seal, a rubber pad, a water seal pressure plate, and connectors. The P-shaped water seal is installed on the gate leaf metal plate. The rubber pad is positioned between the P-shaped water seal and the gate leaf metal plate. The water seal pressure plate is installed on the P-shaped water seal. The water seal pressure plate, the P-shaped water seal, the rubber pad, and the gate leaf metal plate are connected and fixed by connectors. One end of the P-shaped water seal, the rubber pad, and the gate leaf metal plate is pressed against the surface of the stop plate. The water seal pressure plate is provided with a countersunk hole. The connectors include bolts and nuts. The nuts are placed in the countersunk hole. The bolts pass through the gate leaf metal plate, the rubber pad, and the P-shaped water seal in sequence and are then connected and fixed with the nuts. The end of the water seal pressure plate near the round head of the P-shaped water seal is chamfered. The water seal pressure plate has two chamfers, one on the top and one on the bottom. The chamfer near the P-shaped water seal has a radius of 15mm, and the other chamfer has a radius of 3mm.

[0018] When used with a P60A type water seal, the length of the water seal pressure plate is 78mm, and its thickness is selected to be 25mm~30mm. When the water head of the gate is between 50m and 80m, 25mm is sufficient to meet the requirements. When the water head of the gate is above 80m, 30mm is sufficient to meet the requirements.

[0019] The distance from the center line of the countersunk hole on the water seal pressure plate to the flat end, i.e. the end furthest from the water seal head, is 40mm~45mm, and it is connected with M20 bolts.

[0020] The countersunk holes on the water seal pressure plate have a diameter φ of 30mm~40mm, depending on the structural requirements and the type of bolt head.

[0021] A notch is provided at the angle between the door leaf metal plate and the stop plate. This notch provides sufficient deformation space for the rubber pad, preventing uneven installation and gaps, and increasing installation redundancy. The side length of this notch is B = 10mm~15mm.

[0022] The end of the water seal pressure plate near the P-shaped water seal head has a smooth arc surface and three chamfers from top to bottom. The arc edges of two adjacent chamfers are tangent. The first chamfer has a radius of 5mm, the second chamfer has a radius of 35mm, and the third chamfer has a radius of 5mm.

[0023] Example 2: A high-head arc-shaped gate top water seal structure is installed on the gate leaf structure. The gate leaf structure includes a stop plate, a gate leaf metal plate, and a gate leaf panel. The stop plate and the gate leaf panel are vertically parallel, and the gate leaf metal plate is horizontally positioned between the stop plate and the gate leaf panel. The top water seal structure includes a P-shaped water seal, a rubber pad, a water seal pressure plate, and connecting components. The P-shaped water seal is installed on the gate leaf metal plate, the rubber pad is positioned between the P-shaped water seal and the gate leaf metal plate, and the water seal pressure plate is installed on the P-shaped water seal. The water seal pressure plate, P-shaped water seal, rubber pad, and gate leaf metal plate are connected and fixed by connecting components. One end of the P-shaped water seal, rubber pad, and gate leaf metal plate is pressed against the surface of the stop plate. The water seal pressure plate has a countersunk hole. The connecting components include bolts and nuts. The nuts are positioned inside the countersunk hole. The bolts pass sequentially through the gate leaf metal plate, rubber pad, and P-shaped water seal before being connected and fixed to the nuts. The end of the water seal pressure plate near the round head of the P-shaped water seal has a chamfer.

[0024] The water seal pressure plate has a smooth, rounded end face near the P-shaped water seal head, with three chamfers from top to bottom. The rounded edges of adjacent chamfers are tangent. The first chamfer has a radius of curvature (R) of 5mm, the second 35mm, and the third 5mm. A notch is provided at the angle between the door leaf metal plate and the stop plate on the rubber pad. This notch provides sufficient deformation space for the rubber pad, preventing uneven installation and gaps, and increasing installation redundancy.

[0025] The water seal pressure plate has a rectangular cross-section structure and is made of steel. When used with the P60A type water seal, its length is 78mm and its thickness is 30mm; the other dimensions are the same as in Example 1.

Claims

1. A high-head arc-shaped gate top water seal structure, installed on the gate leaf structure, the gate leaf structure comprising a stop plate, a gate leaf metal plate, and a gate leaf panel, wherein the stop plate and the gate leaf panel are vertically parallel, and the gate leaf metal plate is horizontally disposed between the stop plate and the gate leaf panel, characterized in that... The top water seal structure includes a P-shaped water seal, a rubber pad, a water seal pressure plate, and connectors. The P-shaped water seal is installed on the door leaf metal plate, the rubber pad is placed between the P-shaped water seal and the door leaf metal plate, and the water seal pressure plate is installed on the P-shaped water seal. The water seal pressure plate, P-shaped water seal, rubber pad, and door leaf metal plate are connected and fixed together by connectors. One end of the P-shaped water seal, rubber pad, and door leaf metal plate is pressed against the surface of the stop plate. The water seal pressure plate is provided with a countersunk hole. The connectors include bolts and nuts. The nuts are placed in the countersunk hole. The bolts pass through the door leaf metal plate, rubber pad, and P-shaped water seal in sequence and are then connected and fixed with the nuts. The end of the water seal pressure plate near the round head of the P-shaped water seal is provided with a chamfer.

2. The high-head arc-shaped gate top water seal structure as described in claim 1, characterized in that... The water seal pressure plate is provided with two chamfers, one on the top and one on the bottom. The chamfer near the P-shaped water seal has a radius of 15 mm, and the other chamfer has a radius of 3 mm.

3. The high-head arc-shaped gate top water seal structure as described in claim 1, characterized in that... The water seal pressure plate has a smooth arc surface at one end near the P-shaped water seal head. It has three chamfers from top to bottom, with the arc edges of two adjacent chamfers being tangent. The first chamfer has a radius of 5mm, the second chamfer has a radius of 35mm, and the third chamfer has a radius of 5mm.

4. The high-head arc-shaped gate top water seal structure as described in claim 1, characterized in that... The rubber pad has a notch at the angle between the door leaf metal plate and the stop plate.

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