A type of submersible arc-shaped gate limiting device

Abstract

The application provides a kind of limit device for submerged arc gate, which can automatically realize the position limitation of gate when the orifice is completely closed, and automatically release the limitation when the gate is opened by the lifting action of the hoist, which can effectively avoid the lifting phenomenon that may occur in the later stage when the submerged arc gate is fully closed, improve the stress state of the hoist boom when the gate is fully closed, and avoid the frequent operation of the hoist. The device provided by the application has simple structure and easy operation, which can improve the sealing performance of the submerged arc gate when it is fully closed, effectively reduce the investment and operation energy consumption of the submerged arc gate and its hoist, and can be widely used in water conservancy and hydropower projects.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy and hydropower engineering technology, specifically relating to a submerged arc gate limiting device. Background Technology

[0002] In water conservancy and hydropower projects, submerged arch gates are typically arched and operated using swing-type hydraulic hoists. Due to the relatively high water head, submerged arched gates experience significant frictional resistance during opening and closing; the side water seals generally require pre-pressurization, further increasing frictional resistance; additionally, there is upward force at the top water seal when the gate is fully closed. Therefore, double-acting hydraulic hoists are commonly used, meaning the gate cannot completely close the orifice by its own weight and requires the downward pressure of the hoist to achieve this. This necessitates that the hydraulic hoist possess both upward lifting and downward closing capabilities.

[0003] After a submerged arc gate is fully closed using the downward pressure of a hydraulic hoist, the gate tends to rise after being fully closed because the upward force at the top water seal remains, and the side and bottom water seals retain some rebound force after compression. While the hydraulic hoist can provide significant downward pressure when the orifice is fully closed using a pump station, the pump station typically stops operating after closure. Since internal leakage in the hydraulic cylinder is difficult to completely avoid, even if the leakage is small, long-term internal leakage will gradually reduce or eliminate the downward pressure of the hydraulic hoist. At this point, the submerged arc gate will rise, resulting in significant water leakage at the bottom of the orifice. Many domestic engineering projects have experienced this phenomenon of gate rising after being fully closed for a period of time. Currently, there are generally two solutions: one is to start the pump station to pressurize the upper chamber of the cylinder based on the pressure monitoring of the hydraulic gate hoist. This requires the hydraulic gate hoist to be started and pressurized every once in a while after the gate is fully closed, resulting in high energy consumption. The other solution is to equip the hydraulic gate hoist with an accumulator to continuously pressurize the upper chamber of the cylinder. This solution increases both the space occupied by the equipment and the investment. In addition, regardless of the solution, the piston rod of the hydraulic gate hoist is under pressure for a long time, which will affect the service life of the equipment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a downhole arc-shaped gate limiting device, which can effectively solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a downhole arc-shaped gate limiting device, comprising a connecting rod, a support frame, a movable limiter, and a fixed limit block. The connecting rod connects the gate lifting lug and the hoisting rod. The support frame is fixed on the web of the top crossbeam downstream of the arc-shaped gate lifting lug. The movable limiter is installed on the web of the top crossbeam on one or both sides of the connecting rod. The fixed limit block is anchored to the breast wall at the top of the arc-shaped gate opening.

[0006] Furthermore, the connecting boom includes a boom body, a gate lifting lug shaft, a gate lifting lug bearing, a hoist lifting lug shaft, and a hoist lifting lug bearing. The boom body has lifting lug holes at both ends for installing the gate lifting lug bearing and the hoist lifting lug bearing, respectively. The lower part of the boom body is connected to the gate lifting lug via the gate lifting lug shaft, and the upper part of the boom body is connected to the hoist boom via the hoist lifting lug shaft. A gate lifting lug bearing is installed on the gate lifting lug shaft to allow the boom body to rotate around the gate lifting lug hole, and a hoist lifting lug bearing is installed on the hoist lifting lug shaft to allow the boom body to rotate around the hoist boom.

[0007] Furthermore, the boom body includes two side lug plates and a middle web plate. An outwardly extending crank arm is provided at the lower part of the lug plate, and the angle α between the axis of the crank arm and the line connecting the center of the upper and lower lug holes of the boom body is an obtuse angle.

[0008] Furthermore, the support frame is fixed on the web of the top crossbeam on the downstream side of the gate lifting lug. After the lifting rod body rotates down a certain angle around the gate lifting lug hole, its middle web will be supported on the top plane of the support frame.

[0009] Furthermore, the movable limiter includes a movable limit block, a limit slider, a guide sleeve, a guide bushing, and a spring. The limit slider and the guide sleeve are respectively bolted to the upstream and downstream sides of the web of the top crossbeam. The spring is inserted into the downstream end of the guide sleeve. The upstream part of the movable limit block is supported on the limit slider, and the downstream part is inserted into the inner hole of the guide sleeve after the guide bushing is installed.

[0010] Furthermore, the upper part of the guide sleeve is a cylindrical structure, the lower part is a flat plate structure, and the middle part is a connecting and reinforcing system.

[0011] Furthermore, the downstream side of the movable limiting block has a shaft-shaped structure, and the upstream side has a block-shaped structure. A downward-opening groove is provided below the block-shaped structure, and a rod-shaped structure is provided on the side of the block-shaped structure near the connecting rod.

[0012] Furthermore, the fixed limiting block is a block-shaped structure with a smaller top and a larger bottom in longitudinal cross-section, and its downstream surface is an inclined surface. When the gate is fully closed, its bottom plane is flush with the top plane of the upstream side of the movable limiting block.

[0013] The beneficial effects of this invention are as follows: The submerged arc gate limiting device provided by this invention automatically restricts the gate's position when the orifice is fully closed, and automatically releases the limit by utilizing the lifting action of the hoist when the gate is opened. This effectively avoids the upward lifting phenomenon that may occur in the later stages when the submerged arc gate is fully closed, improves the stress state of the hoist boom under long-term pressure when fully closed, and avoids frequent operation of the hoist. The device provided by this invention has a simple structure and is easy to operate. It can improve the sealing performance of the submerged arc gate when fully closed, and effectively reduce the investment and operating energy consumption of the submerged arc gate and its opening and closing equipment. It can be widely used in water conservancy and hydropower projects. Attached Figure Description

[0014] Figure 1 An elevation view of the downhole arc-shaped gate limiting device provided by the present invention;

[0015] Figure 2 A perspective view of the connecting rod provided by the present invention;

[0016] Figure 3 The structural diagram of the boom body provided by the present invention;

[0017] Figure 4 An elevation view of the movable limiter provided by the present invention;

[0018] Figure 5 A perspective view of the guide sleeve provided by the present invention;

[0019] Figure 6 A perspective view of the movable limiting block provided by the present invention;

[0020] Figure 7 An elevation view of the large-opening downhole arc-shaped gate limiting device provided by the present invention;

[0021] Figure 8 An elevation view of the small-aperture downhole arc-shaped gate limiting device provided by the present invention;

[0022] Figure 9 An elevation view of the instantaneous opening of the submerged arc-shaped gate limiting device provided by the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] In the description of this invention, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figure 1 As shown, the submerged arc-shaped gate limiting device of the present invention includes a connecting rod 1, a support frame 2, a movable limiter 3, and a fixed limit block 4.

[0027] The connecting rod 1 connects the gate lifting lug and the hoisting rod 7. The support frame 2 is fixed on the top crossbeam web 5 on the downstream side of the lifting lug of the arc gate 10. The movable limiter 3 is installed on the top crossbeam web 5 on one or both sides of the connecting rod 1. The fixed limit block 4 is anchored on the breast wall 6 at the top of the arc gate opening.

[0028] As a specific structure, see [reference] Figure 2 The connecting boom 1 includes a boom body 11, a gate lifting lug shaft 12, a gate lifting lug bearing 13, a hoist lifting lug shaft 14, and a hoist lifting lug bearing 15. The boom body 11 has lifting lug holes at both ends for installing the gate lifting lug bearing 13 and the hoist lifting lug bearing 15, respectively. The lower part of the boom body 11 is connected to the gate lifting lug through the gate lifting lug shaft 12, and the upper part of the boom body 11 is connected to the hoist boom 7 through the hoist lifting lug shaft 14. The gate lifting lug bearing 13 is installed on the gate lifting lug shaft 12 so that the boom body 11 can rotate around the gate lifting lug hole, and the hoist lifting lug bearing 15 is installed on the hoist lifting lug shaft 14 so that the boom body 11 can rotate around the hoist boom 7.

[0029] As a specific structure, see [reference] Figure 3 The boom body 11 includes two side lug plates 112 and a middle web plate 113. After the boom body 11 rotates down around the gate lug hole by a certain angle, the middle web plate 113 will be supported on the top plane of the support frame 2. An outwardly extending crank arm 111 is provided at the lower part of the lug plate. The angle α between the axis of the crank arm 111 and the line connecting the center of the upper and lower lug holes of the boom body 11 is an obtuse angle.

[0030] As a specific structure, see [reference] Figure 4 The movable limiter 3 includes a movable limit block 31, a limit slider 32, a guide sleeve 33, a guide bushing 34, and a spring 35. The limit slider 32 and the guide sleeve 33 are respectively bolted to the upstream and downstream sides of the web of the top beam of the door leaf. The downstream tail of the guide sleeve 33 is inserted into the guide sleeve 33. The upstream part of the movable limit block 31 is supported on the limit slider 32, and the downstream part is inserted into the guide sleeve 33 after the guide bushing 34 is installed.

[0031] As a specific structure, see [reference] Figure 5 The upper part of the guide sleeve 33 is a cylindrical structure, the lower part is a flat plate structure, and the middle part is a connecting and reinforcing system.

[0032] As a specific structure, see [reference] Figure 6 The downstream side of the movable limiting block 31 is a shaft-shaped structure 311, and the upstream side is a block-shaped structure 312. Its top plane is flush with the bottom plane of the fixed limiting block 4 when the gate is fully closed. A downward-opening groove is provided below the block-shaped structure 312, and a rod-shaped structure 313 is provided on the side of the block structure 312 near the connecting rod 1.

[0033] The method of use and principle of the downhole arc gate limiting device provided by this invention are as follows:

[0034] During the closing process of the downhole type arc gate limiting device, when the opening is large, refer to... Figure 7 Because the frictional resistance of the gate support and water seal is small, the upward force on the top of the gate is also small or zero. At this time, the gate's own weight is greater than the sum of the frictional resistance and the upward force. Therefore, the gate is in a state of tension at this time, the axis of the upper and lower lifting lug holes of the connecting rod 1 is collinear with the axis of the hoisting rod, and the rod body 11 is detached from the support frame 2 (not in contact).

[0035] As the gate continues to descend and close, the frictional resistance and upward force on the gate increase at its small opening. When the gate's weight is less than the sum of the frictional resistance and upward force, the gate will briefly stop descending. As the hoist boom continues to extend downward, the weight of the boom body 11 will cause it to rotate downward around the gate's lifting lug hole (clockwise as shown in the diagram) until the middle web of the boom body 11 contacts the top plane of the support frame 2, at which point the boom body 11 will be supported on the support frame 2. At this time, the axis of the upper and lower lifting lug holes connecting the boom 1 is not collinear with the axis of the hoist boom, and the angle between the two lines is an obtuse angle. When the hoist boom continues to extend downward and close the gate, it will provide downward pressure to the gate, causing it to resume its descent and closure. As the gate continues to descend, the upstream structure 311 of the movable limit block 31 will touch the fixed limit block 4 fixed to the breast wall of the orifice. (See reference...) Figure 8As the gate continues to descend, the movable limit block 31, constrained by the limit slider 32 and the guide sleeve 33, can only slide linearly downstream, at which point the spring 35 will be compressed.

[0036] When the gate is fully closed, the movable limit block 31 will move linearly upstream under the action of spring 35. At this time, the top plane of the movable limit block 31 will be flush with the bottom plane of the fixed limit block 4 and pressed tightly against it. (See reference...) Figure 1 At this point, even if the gate hoist cannot provide downward pressure, the upward force of the top water seal and the upward rebound force of the water seal cannot lift the gate under the constraint of the fixed limit block 4.

[0037] When the gate is fully closed and ready to be opened, the hoist boom will retract to lift the gate. At this time, the gate will not open immediately because the axes of the upper and lower lifting lug holes of connecting boom 1 are not collinear with the axis of the hoist boom, and the angle between the two lines is obtuse. The retraction of the hoist boom causes connecting boom 1 to rotate upwards (counterclockwise in the diagram) around the gate lifting lug holes until the axes of the upper and lower lifting lug holes of connecting boom 1 are collinear with the axis of the hoist boom. (See reference...) Figure 9 During the flipping process of the connecting boom 1, the extended crank arm 111 of the boom body 11 of the hoist will push the rod-shaped structure 313 on the side of the movable limit block 31, causing the movable limit block 31 to move downstream in a straight line until the upstream structure of the movable limit block 31 is freed from the constraint of the fixed limit block 4. At this time, the arc gate is no longer restricted from rotating upward, and the boom of the hoist will retract smoothly to lift the gate.

[0038] The submerged arc gate limiting device of the present invention is a simple and reliable gate limiting device. When the orifice is fully closed, the position of the gate is automatically limited. When the gate is opened, the limit is automatically released by the lifting action of the hoist. It can effectively avoid the upward phenomenon that may occur in the later stage when the submerged arc gate is fully closed, improve the stress state of the hoist boom under long-term pressure when it is fully closed, and avoid the frequent operation of the hoist.

[0039] This invention provides a simple and reliable limiting device for a submerged arc gate. It has a simple structure and is easy to operate. It can improve the sealing performance of the submerged arc gate when it is fully closed, and effectively reduce the investment and operating energy consumption of the submerged arc gate and its opening and closing equipment. It can be widely used in water conservancy and hydropower projects.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A downhole arc-shaped gate limiting device, characterized in that, It includes a connecting rod (1), a support frame (2), a movable limiter (3) and a fixed limit block (4). The connecting rod (1) connects the gate lifting lug and the hoist lifting rod (7). The support frame (2) is fixed on the web plate (5) of the top crossbeam downstream of the lifting lug of the arc gate (10). The movable limiter (3) is installed on the web plate (5) of the top crossbeam on one or both sides of the connecting rod (1). The fixed limit block (4) is anchored on the breast wall (6) at the top of the arc gate opening. The movable limiter (3) includes a movable limit block (31), a limit slider (32), a guide sleeve (33), a guide bushing (34), and a spring (35). The limit slider (32) and the guide sleeve (33) are respectively fixed to the upstream and downstream sides of the web plate (5) of the top crossbeam with bolts. The spring (35) is inserted into the downstream tail of the guide sleeve (33). The upstream part of the movable limit block (31) is supported on the limit slider (32), and the downstream part is installed with the guide bushing (34) and then inserted into the inner hole of the guide sleeve (33). The fixed limiting block (4) is a block structure with a smaller upper section and a larger lower section in the longitudinal cross section. Its downstream surface is an inclined surface, and its bottom plane is flush with the top plane of the upstream side of the movable limiting block (31) when the gate is fully closed.

2. The downhole arc-shaped gate limiting device according to claim 1, characterized in that, The connecting boom (1) includes a boom body (11), a gate lifting lug shaft (12), a gate lifting lug bearing (13), a hoist lifting lug shaft (14), and a hoist lifting lug bearing (15). The boom body (11) has lifting lug holes at both ends for installing the gate lifting lug bearing (13) and the hoist lifting lug bearing (15). The lower part of the boom body (11) is connected to the gate lifting lug through the gate lifting lug shaft (12), and the upper part of the boom body (11) is connected to the hoist boom (7) through the hoist lifting lug shaft (14). The gate lifting lug bearing (13) is installed on the gate lifting lug shaft (12) so that the boom body (11) can rotate around the gate lifting lug hole. The hoist lifting lug bearing (15) is installed on the hoist lifting lug shaft (14) so ​​that the boom body (11) can rotate around the hoist boom (7).

3. The downhole arc-shaped gate limiting device according to claim 2, characterized in that, The main body of the boom (11) includes two side lug plates (112) and a middle web plate (113). An outwardly extending crank arm (111) is provided at the lower part of the lug plate (112). The angle α between the axis of the crank arm (111) and the line connecting the center of the upper and lower lug holes of the main body of the boom (11) is an obtuse angle.

4. The downhole arc-shaped gate limiting device according to claim 3, characterized in that, The support frame (2) is fixed on the web plate (5) of the top crossbeam on the downstream side of the gate lifting lug. After the lifting rod body (11) rotates down around the gate lifting lug hole at a certain angle, its middle web plate (113) will be supported on the top plane of the support frame (2).

5. The downhole arc-shaped gate limiting device according to claim 1, characterized in that, The upper part of the guide sleeve (33) is a cylindrical structure, the lower part is a flat plate structure, and the middle part is a connecting and reinforcing system.

6. The downhole arc-shaped gate limiting device according to claim 1, characterized in that, The downstream side of the movable limiting block (31) is a shaft-shaped structure (311), and the upstream side is a block-shaped structure (312). A downward-facing groove is provided below the block-shaped structure (312), and a rod-shaped structure (313) is provided on the side of the block-shaped structure near the connecting rod (1).

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