A device and method for locking a gate secured to a solid roll

Abstract

A device and locking method for fixing a lock gate on a fixed roll, comprising an upper support, a travel switch, a locking pull rod, a handle, a clamping plate, a bolt, a nut and a self-lubricating bearing piece; the upper support is fixed on the frame of the fixed roll, and the travel switch is fixed on the top of the upper support; one end of the locking pull rod is connected with a lower support, and the other end is fixed on the upper support through the nut; the handle and the clamping plate are fixed on the top of the locking pull rod through the bolt; the self-lubricating bearing piece is located between the nut and the upper support; and the lower support is fixed on the gate. The device and locking method are simple in structure, safe in operation, reliable in locking, and capable of realizing remote monitoring of the locking state, so as to solve the problems of existing gate locking devices, such as difficult manual carrying, dangerous operation, easy environmental influence and fixed locking position.

Description

Technical Field

[0001] This invention belongs to the field of gate technology for water conservancy and hydropower projects, and specifically relates to a device and locking method for locking a gate fixed on a roll. Background Technology

[0002] In water conservancy and hydropower projects, fixed winch gate hoists (referred to as "fixed winches") are common equipment used for opening and closing gates, and are widely used in flood discharge, water conveyance, and water diversion systems of various sluice gates, reservoirs, and power stations. After the gate is opened to the predetermined height, or during maintenance and repair, it usually needs to be reliably locked above the orifice to prevent the gate from sliding down due to unexpected situations such as hoist malfunction, hydraulic system failure, or wire rope breakage, which could cause safety accidents or affect the operation of the project.

[0003] Currently, common gate locking methods mainly include the following two categories: I. Locking using the hoist itself: This method typically relies on the hoist's brake, using an electromagnetic or hydraulic brake to brake the drive motor or reducer of the hoisting mechanism, thus suspending the gate in a certain position. However, this method has significant drawbacks: under long-term static load conditions, the brake pads may experience a decrease in friction coefficient due to creep, aging, or a humid environment; in the event of a power outage or electrical control system failure, the brake may unexpectedly release, causing the gate to slide uncontrollably under its own weight, resulting in low reliability. Therefore, this method is usually only used for temporary suspension and cannot meet the requirements for long-term safe locking.

[0004] II. Employing Independent Mechanical Locking Devices: To overcome the aforementioned shortcomings, independent mechanical locking devices are commonly installed in engineering projects. Existing mechanical locking devices mainly take the following forms: Manual pin-type locking: Locking beams or locking lugs are installed on both sides of the gate body, and locking platforms or locking holes are pre-embedded at corresponding elevations on the gate piers or support columns. After the gate is raised to the predetermined position, the operator manually inserts the locking pin or locking beam between the gate and the pre-embedded parts to achieve rigid support. This method has a simple structure, but it has the following problems: First, the locking operation requires close-range manual operation. If the gate is located at a height or above a deep opening, the working environment is dangerous, and there is a risk of personnel falling. Second, the locking pins or locking beams of large gates are heavy, and manual handling and insertion are extremely laborious, resulting in low automation. Hydraulic / Pneumatic Automatic Locking Devices: In recent years, automatic locking devices driven by hydraulic or pneumatic cylinders have emerged. These devices automatically extend and retract by installing telescopic locking blocks on both sides of the gate and cooperating with a control system. While these devices achieve remote control to some extent, they still have drawbacks: Firstly, hydraulic or pneumatic systems require independent pump stations, pipelines, and control valve assemblies, which not only increases equipment costs and civil engineering work, but also makes them prone to problems such as seal aging and oil leakage in outdoor environments, resulting in a large amount of maintenance work in the later stages. In summary, existing gate locking devices generally suffer from problems such as complex structure, inconvenient operation, high susceptibility to environmental influences on reliability, and high dependence on manual operation. Especially for gates operated by fixed winch-type hoists, designing a simple, reliable locking device and method that can achieve locking at any position within the travel range, utilizing the inherent structural characteristics of the hoist, is a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device and locking method for locking a gate fixed on a fixed roll. The device and locking method are simple in structure, safe to operate, reliable in locking, and can realize remote monitoring of the locking status, so as to solve the problems of existing gate locking devices such as difficulty in manual handling, dangerous operation, susceptibility to environmental influence, and fixed locking position.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A device for locking a gate fixed on a roll includes an upper support, a limit switch, a locking lever, a handle, a locking plate, bolts, nuts, and self-lubricating bearing plates; The upper support is fixed on the fixed winding frame, and the limit switch is fixed on the top of the upper support; one end of the locking rod is connected to the lower support, and the other end is fixed to the upper support by a nut; the handle and the clamping plate are fixed to the top of the locking rod by bolts; the self-lubricating bearing plate is located between the nut and the upper support; the lower support is fixed on the gate.

[0007] As a preferred embodiment, the handle includes a handle body and a limiting plate, with a square hole at the front end of the handle body that matches the size of the top of the locking lever.

[0008] As a preferred embodiment, the card plate secures the handle using bolts and screw holes at the top of the locking lever.

[0009] As a preferred embodiment, the nut secures the locking rod to the upper support, and the self-lubricating bearing plate is disposed between the nut and the upper support.

[0010] As a preferred embodiment, the upper support is a welded steel structure with through holes at the top and bottom, symmetrically arranged on both sides of the fixed coil and welded to the fixed coil frame.

[0011] As a preferred embodiment, the locking rod consists of a rod and a locking block; the main body of the rod is a round steel structure with a countersunk screw hole at the top, threaded outer diameter in the middle, and a square head at the top; the locking block is an elliptical structure and is welded to the rod.

[0012] As a preferred embodiment, the lower support is a welded square box made of steel structure, which is welded and fixed to the top of the gate. The top of the box has an oblong hole, and the length perpendicular to the oblong hole is slightly greater than that of the locking block.

[0013] As a preferred embodiment, the limit switch is installed on the top of the upper support. When the handle moves to the preset position, the limit switch is triggered to output an electrical signal to the remote control terminal.

[0014] The method of using the device for fixing the locking gate on the fixed roll includes the following steps: S1. Gate installation: Weld the lower support symmetrically to the top of the gate, ensuring that the center of the waist-shaped hole of the lower support is aligned with the center of the gate lifting point. After welding, use a level to calibrate the horizontality error of the lower support to ≤2mm. S2. Upper support fixing: Align the center of the through hole of the upper support with the center of the waist-shaped hole of the lower support. After positioning with the aid of plumb bob or laser, weld and fix the upper support to the fixed winding machine frame. S3. Gate lifting: Start the fixed coil to slowly lift the gate, observe the locking block of the locking rod, and stop lifting when the locking block is fully inserted into the waist-shaped hole of the lower support and perpendicular to the waist-shaped hole. At this time, the locking block and the waist-shaped hole form a mechanical lock. S4. Locking Operation: Move the handle from the initial horizontal position to the fully closed position, causing the locking block to rotate to the position where it intersects with the oblong hole. The limit plate of the handle will then engage with the limit groove, triggering the limit switch to output an electrical signal to the remote control system to confirm that the locking is complete. S5. Locking Verification: After receiving the signal, the remote control system displays the locking status. The operator visually checks whether the handle is locked in the limit position to ensure reliable locking.

[0015] As a preferred embodiment, when the lock is released, the handle is moved from the fully closed position (90 degrees) to the fully open position (0 degrees), causing the locking block to rotate to the position aligned with the oblong hole. The limit switch triggers the limit signal, and the remote control system displays the unlocked status.

[0016] The present invention can achieve the following beneficial effects: 1. The device of the present invention is mainly composed of mechanical parts, without the need for an independent hydraulic station, pneumatic pump station and complex control valve group. It has a compact structure, low manufacturing cost and low maintenance workload, and is especially suitable for harsh field working conditions.

[0017] 2. By using the handle in conjunction with the limit switch, the operator can confirm the locking status via electrical signal at the remote control terminal. This eliminates the need for manual pin insertion in dangerous areas such as high altitudes or deep openings of the gate, completely eliminating the risk of personnel falling and significantly improving operational safety.

[0018] 3. The present invention adopts mechanical rigid locking, and the locking block and the lower support are in surface contact or partial surface contact. It has a large load-bearing capacity, high reliability, and is not affected by the failure of the opening and closing mechanism brake or electrical fault, and can achieve long-term reliable locking of the gate.

[0019] 4. The device of the present invention is fixed to the top of the winding machine frame and the gate. The locking position can be flexibly set according to the gate lifting height. It is not limited by the pre-embedded hole position in the civil engineering. It can reliably lock at any position within the gate stroke range and has wide adaptability.

[0020] 5. The device of this invention is directly fixed on the fixed-winding machine frame, and the locking is completed by the lifting action of the fixed winding itself. It does not require large-scale modification of the civil engineering structure, is easy to install, and is suitable for new construction projects and upgrades of existing projects. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a general layout diagram of the device of the present invention; Figure 2 This is a three-dimensional structural diagram of the device of the present invention; Figure 3 This is a front view of the device of the present invention; Figure 4 This is a top view of the device of the present invention; Figure 5 This is a three-dimensional structural diagram of the handle of the present invention; Figure 6 This is a three-dimensional structural diagram of the locking lever of the present invention.

[0022] In the diagram: 1. Handle; 2. Clamping plate; 3. Bolt; 4. Nut; 5. Self-lubricating bearing plate; 6. Upper support; 7. Locking lever; 8. Lower support; 9. Limit switch. Detailed Implementation

[0023] Preferred solutions include Figures 1 to 6 As shown, a device for locking a gate fixed on a roll includes a handle 1, a locking plate 2, a bolt 3, a nut 4, a self-lubricating bearing plate 5, an upper support 6, a locking lever 7, a lower support 8, and a limit switch 9.

[0024] The handle 1 consists of a handle body 101 and a limiting plate 102. A square hole is machined at the front end of the handle body 101, the size of which matches the size of the square head at the top of the locking lever 7, to transmit torque, allowing the operator to rotate the locking lever 7 by turning the handle 1. The limiting plate 102 cooperates with the limit switch 9, triggering the limit switch 9 when the lever is rotated to the desired position.

[0025] The clamping plate 2 has a plate-like structure and is fixedly connected to the countersunk screw hole at the top of the locking lever 7 by bolts 3, pressing the handle 1 and fixing it to the top of the locking lever 7 to prevent the handle 1 from disengaging from the locking lever 7 during rotation, thus ensuring the reliability of operation.

[0026] The nut 4 is used to fix the locking rod 7 to the upper support 6. Specifically, the external thread in the middle of the locking rod 7 mates with the nut 4, and the nut 4 presses against the upper surface of the upper support 6. A self-lubricating bearing plate 5 is provided between the nut 4 and the upper support 6. The self-lubricating bearing plate 5 is made of copper alloy self-lubricating material to reduce the frictional resistance between the nut 4 and the upper support 6 when the locking rod 7 rotates, making the operation easy and flexible.

[0027] The upper support 6 is a welded steel structure with an overall frame structure. Both its top and bottom plates have through holes for the locking rod 7 to pass through. The two upper supports 6 are symmetrically arranged on both sides of the fixed winch-type gate hoist (fixed winch) and fixed to the frame of the fixed winch by welding. All components in the device, except for the lower support 8, are installed on the upper supports 6, thus integrating the entire locking device with the fixed winch into one unit.

[0028] The locking rod 7 is a welded steel structure, mainly composed of a rod 701 and a locking block 702. The main body of the rod 701 is a round steel structure with a countersunk screw hole at its top for engaging with the bolt 3 to fix the clamping plate 2. The upper part of the rod 701 is machined into a square head for engaging with the square hole at the front end of the handle 1 to transmit torque. The outer surface of the middle part of the rod 701 is threaded, which engages with the nut 4 to axially fix the locking rod 7 to the upper support 6. The lower part of the rod 701 is welded to the locking block 702. The locking block 702 has an elliptical structure with a significant dimensional difference between its major and minor axes to allow for locking or disengaging from the lower support 8 during rotation.

[0029] The lower support 8 is a welded steel structure, generally box-shaped, and welded to the top of the gate. The top surface of the lower support 8 has an oblong hole. The long side of this hole is slightly larger than the long axis of the locking block 702, and the short side (i.e., the width perpendicular to the direction of the oblong hole) is slightly larger than the short axis but smaller than the long axis of the locking block 702. This design ensures that when the long axis of the locking block 702 is aligned with the long side of the oblong hole, the locking block 702 can freely pass through it; when the locking block 702 rotates 90°, its long axis becomes perpendicular to the long side of the oblong hole, preventing it from dislodging and thus achieving locking.

[0030] The limit switch 9 is a switching device that monitors the position of the handle 1, and is installed on the top of the upper support 6. The limit switch 9 is a waterproof and dustproof micro switch or proximity switch. When the limit plate 102 of the handle 1 moves to the preset position with the handle 1, the limit switch 9 is triggered, and the limit switch 9 then outputs an electrical signal to the remote control terminal (such as the central control room) to confirm whether the gate has been locked or unlocked, thereby realizing remote monitoring and status feedback.

[0031] This embodiment also provides a method for locking a gate using the above-described device, specifically including the following steps: S1. Installation steps: Based on the symmetrical arrangement of the gate lifting points, the two lower supports 8 are welded and fixed to appropriate positions on both sides of the top of the gate. The center of the through hole of the upper support 6 is aligned with the center of the oblong hole on the lower support 8, ensuring vertical alignment accuracy. Then, the upper support 6 is welded and fixed to the winding frame. Afterwards, the locking rod 7, self-lubricating bearing plate 5, nut 4, handle 1, clamping plate 2, bolt 3, and limit switch 9 are installed sequentially. In the initial state, the handle 1 is pulled to the fully open position. At this time, the long axis of the locking block 702 is aligned with the long side of the oblong hole of the lower support 8, allowing the locking block 702 to pass freely through the oblong hole.

[0032] S2. Steps for setting the upper limit position: Slowly raise the gate using the fixed coil, observing the position of the locking block 702 at the lower end of the locking lever 7. Stop raising the gate once the locking block 702 has completely passed through the oblong hole in the lower support 8 and extended into the housing of the lower support 8. Set this position as the upper limit position of the fixed coil. By adjusting the travel limit device of the fixed coil, ensure that the gate accurately stops at this position each time it is automatically raised, providing an accurate position reference for subsequent locking operations.

[0033] S3. Locking Operation Procedure: When the gate needs to be locked, the gate is raised to its upper limit position by operating the fixed winding mechanism via the remote control terminal. At this time, the locking block 702 is fully inserted into the housing of the lower support 8. The operator moves the handle 1 from the fully open position to the fully closed position on-site. Driven by the handle 1, the locking rod 7 rotates 90°, and the locking block 702 rotates 90° accordingly, with its long axis becoming perpendicular to the long side of the oblong hole in the lower support 8. At this time, the two sides of the locking block 702 are engaged below the two sides of the oblong hole in the top plate of the lower support 8, forming a rigid support. The gate load is transmitted to the lower support 8 through the locking block 702, and then to the top of the gate. At the same time, the locking rod 7 transmits the force to the upper support 6 and the fixed winding frame, thereby achieving reliable locking of the gate. When handle 1 is moved to the fully closed position, its limit plate 102 triggers the limit switch 9. The limit switch 9 transmits the "fully closed" signal to the remote control terminal, and the operator can confirm that the gate is locked in place. Then, the gate can be safely inspected or other work can be carried out.

[0034] S4. Lock / Unlock Operation Steps: When it is necessary to unlock and lower the gate, the operator moves handle 1 from the fully closed position back to the fully open position. The locking lever 7 rotates 90° in the opposite direction, and the locking block 702 rotates accordingly until its long axis is aligned with the long side of the oblong hole in the lower support 8. At this time, there is no interference between the locking block 702 and the oblong hole, allowing free passage. After handle 1 is moved to the fully open position, its limit plate 102 triggers the limit switch 9, which transmits a "fully open" signal to the remote control terminal. After receiving the unlocking signal, the remote control terminal can control the fixed roll to perform the gate closing operation, safely lowering the gate to the required position.

[0035] Working principle: This invention ingeniously integrates a locking mechanism with a fixed winch-type gate opener (fixed winch). By fixing the upper support 6 to the fixed winch frame and the lower support 8 to the top of the gate, the gate is lifted to the locked position using the lifting function of the fixed winch itself. The core of the locking operation lies in the rotational locking principle between the locking block 702 and the oblong hole of the lower support 8: when the locking block 702 passes through the oblong hole, the handle 1 drives the locking lever 7 to rotate, causing the locking block 702 to form a cross-shaped jam below the oblong hole, thus locking the gate position through mechanical rigidity. To unlock, reverse rotation aligns the locking block 702 with the oblong hole, releasing the constraint.

[0036] During operation, this device eliminates the need for operators to approach the gate body or enter high-altitude hazardous areas, significantly improving operational safety. Furthermore, the entire device eliminates the need for complex auxiliary systems such as hydraulics and pneumatics, achieving locking solely through a purely mechanical structure, resulting in extremely high reliability, environmental adaptability, and low maintenance costs. Because the locking position can be flexibly adjusted according to the upper limit setting of the fixed coil, the device can reliably lock at any position within the gate's travel range, overcoming the fixed position limitations of traditional pre-embedded hole locking methods.

[0037] In summary, the present invention has a simple and compact structure, safe and convenient operation, reliable and stable locking, and strong adaptability. It can effectively solve the problems existing in the current gate locking technology and has good promotion and application value.

[0038] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions 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 scope of protection of the present invention.

Claims

1. A device for locking a gate fixed to a fixed roll, characterized in that, Includes upper support (6), limit switch (9), locking lever (7), handle (1), clamping plate (2), bolt (3), nut (4) and self-lubricating bearing plate (5); The upper support (6) is fixed on the frame of the fixed winding machine, and the limit switch (9) is fixed on the top of the upper support (6); one end of the locking rod (7) is connected to the lower support (8), and the other end is fixed on the upper support (6) by the nut (4); the handle (1) and the clamping plate (2) are fixed on the top of the locking rod (7) by the bolt (3); the self-lubricating bearing plate (5) is located between the nut (4) and the upper support (6); the lower support (8) is fixed on the gate.

2. The device for fixing the locking gate on the fixed roll according to claim 1, characterized in that: The handle (1) includes a handle body (101) and a limiting plate (102). The front end of the handle body (101) has a square hole that matches the top size of the locking lever (7).

3. The device for fixing the locking gate on the fixed roll according to claim 1, characterized in that: The plate (2) uses bolts (3) and the screw holes at the top of the locking lever (7) to fix the handle (1).

4. The device for fixing the locking gate on the fixed roll according to claim 1, characterized in that: Nut (4) fixes locking rod (7) on upper support (6), and self-lubricating bearing plate (5) is set between nut (4) and upper support (6).

5. The device for fixing a locking gate on a fixed roll according to claim 1, characterized in that: The upper support (6) is a steel structure welded component with through holes arranged at the top and bottom, symmetrically arranged on both sides of the fixed roll and welded to the fixed roll frame.

6. The device for fixing a locking gate on a fixed roll according to claim 1, characterized in that: The locking rod (7) consists of a rod (701) and a locking block (702); the main body of the rod (701) is a round steel structure with a countersunk screw hole at the top, threaded outer diameter in the middle, and a square head at the top; the locking block (702) is an elliptical structure and is welded to the rod (701).

7. The device for fixing a locking gate on a fixed roll according to claim 1, characterized in that: The lower support (8) is a steel structure welded square box, which is welded and fixed to the top of the gate. Its top is provided with a waist-shaped hole, and its length perpendicular to the waist-shaped hole is slightly greater than that of the locking block (702).

8. The device for fixing a locking gate on a fixed roll according to claim 1, characterized in that: The limit switch (9) is installed on the top of the upper support (6). When the handle (1) moves to the preset position, the limit switch (9) is triggered to output an electrical signal to the remote control terminal.

9. The method of using the device for fixing the locking gate on the fixed roll according to claim 1, characterized in that, Includes the following steps: S1. Gate installation: Weld the lower support (8) symmetrically to the top of the gate, ensuring that the center of the waist-shaped hole of the lower support (8) is aligned with the center of the gate lifting point. After welding, use a level to calibrate the levelness error of the lower support (8) to ≤2mm. S2. Upper support fixing: The through hole of the upper support (6) is precisely aligned with the center of the waist-shaped hole of the lower support (8). After positioning with the help of plumb bob or laser, the upper support (6) is welded and fixed to the fixed winding machine frame. S3. Gate lifting: Start the fixed roll and slowly lift the gate. Observe the locking block (702) of the locking rod (7). When the locking block (702) is fully inserted into the waist-shaped hole of the lower support (8) and perpendicular to the waist-shaped hole, stop lifting. At this time, the locking block (702) and the waist-shaped hole form a mechanical lock. S4. Locking operation: Move the handle (1) from the initial position (horizontal position) to the fully closed position (90 degrees), so that the locking block (702) is rotated to the position where it intersects with the waist-shaped hole. The limit plate (102) of the handle (1) is inserted into the limit groove, triggering the limit switch (9) to output an electrical signal to the remote control system to confirm that the locking is completed. S5. Locking verification: After receiving the signal, the remote control system displays the locking status. The operator visually checks whether the handle (1) is stuck in the limit position to ensure reliable locking.

10. The method of use according to claim 9, characterized in that: When the lock is released, the handle (1) is moved from the fully closed position to the fully open position, so that the locking block (702) is rotated to the position aligned with the waist-shaped hole. The limit switch (9) triggers the limit signal, and the remote control system displays the unlocked status.

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