Anti-falling locking monitoring device of hydraulic hoist gate and using method of anti-falling locking monitoring device

Abstract

The invention provides an anti-falling locking monitoring device of a hydraulic hoist gate and a using method of the anti-falling locking monitoring device. The device comprises a hydraulic hoist and a synchronous monitoring anti-falling device which are mounted on a mounting platform in parallel. When the gate is lifted, the jacking column of the gate pushes the jacking rod of the anti-falling device to drive the balance weight assembly to touch the multi-stage limiting switch, and the position and the movement direction of the gate are fed back in real time; meanwhile, the locking shaft at the tail of the piston rod enters the tail locking seat, and the locking plate is driven by the hydraulic cylinder to be clamped in the radial direction, so that mechanical locking is achieved. The locking state is electrically fed back through the connecting rod and the sensing plate matched with the limiting switch. A steel wire rope opening instrument is additionally arranged to monitor the stroke of the piston rod. When hydraulic pressure loses efficacy or the gate falls accidentally, the anti-falling device independently triggers the control system to automatically reset, the pump is stopped, and a sound-light alarm is given out. According to the invention, double locking of a full-open position, multi-dimensional monitoring of an operation state and quick response of a fault are realized, and the safety and reliability of a gate system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydraulic engineering, in particular to a hydraulic hoist gate anti-falling locking monitoring device and a use method thereof. BACKGROUND

[0002] In water conservancy and hydropower projects, ship locks, flood control and drainage facilities, the opening and closing of the gate is usually driven by a hydraulic hoist. The traditional hydraulic hoist drives the piston rod by the hydraulic cylinder to lift the gate, which has the advantages of large output force and stable control. However, in the long-term operation process, the existing technology still has the following outstanding technical problems: The existing hydraulic hoist relies on the hydraulic system to maintain the pressure to maintain the gate in the fully open position. Once a fault such as hydraulic oil leakage, pipeline rupture, seal failure or power source interruption occurs, the piston rod will not be able to maintain the position, resulting in the gate accidentally falling under the action of gravity or water pressure. Such free-falling gate accidents may cause equipment damage, uncontrolled water flow, and even endanger the safety of downstream personnel and facilities.

[0003] Part of the system is provided with a mechanical locking device, but its locking action relies on manual operation or a single hydraulic signal trigger, and lacks a feedback mechanism to determine whether the locking is truly in place. There is a risk of false locking or incomplete locking, which cannot be timely identified by the control system, posing a safety hazard.

[0004] The existing technology uses a single limit switch or encoder to monitor the gate position, which can only determine whether the preset point is reached, and cannot effectively identify the direction of gate movement or non-instructional abnormal movement. When the gate slowly moves down in the fully open state due to hydraulic leakage, the system cannot timely detect and intervene until serious consequences occur.

[0005] Most monitoring devices are directly integrated into the hydraulic control system. Once the hydraulic system fails as a whole, the monitoring function is also lost, and independent safety protection cannot be provided when the main system fails. Even if some systems have alarm functions, they often only stop at the level of sound and light prompts, lack of automatic reset attempts, emergency pump stop, and active intervention measures such as linkage shutdown, and cannot effectively curb the development of accidents.

[0006] In summary, the existing hydraulic hoist gate system has obvious shortcomings in terms of anti-falling safety, locking reliability, state sensing ability and fault emergency response, and an integrated solution is needed that combines independent anti-falling monitoring, mechanical reliable locking, multi-level state feedback and intelligent emergency control. SUMMARY

[0007] The main purpose of the present application is to provide a hydraulic hoist gate anti-falling locking monitoring device and a use method thereof, which solves the problems in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a synchronous monitoring anti-fall device and a hydraulic hoist are installed side by side on the installation platform. The piston rod end of the hydraulic hoist passes through the installation platform and is hinged to the gate. The top rod end of the synchronous monitoring anti-fall device passes through the installation platform and is located below it. A top support column is fixed on the gate. When the gate is lifted under the drive of the hydraulic hoist, the top support column abuts against the top rod, thereby providing feedback on the gate lifting position in the synchronous monitoring anti-fall device. The hydraulic gate hoist is also equipped with a locking mechanism at the tail end, which is used to lock the piston rod in the hydraulic gate hoist after the gate is lifted.

[0009] Preferably, the top of the cylinder in the hydraulic gate hoist is connected to the mounting platform via an end cover, and the end of the piston rod slides against the cylinder via a piston. The tail locking seat in the locking mechanism is fixed to the bottom of the cylinder. The locking shaft at the end of the piston rod enters the tail locking seat when the gate is lifted. The tail locking seat is equipped with a radially sliding locking plate, which is sleeved on the locking shaft to lock it.

[0010] Preferably, the inner side of the end cap abuts against the piston rod through a sealing assembly, and the end of the piston rod is fixed with a hinge lug, which is hinged to the hinge seat on the gate through a pin.

[0011] Preferably, a wire rope opening device is fixedly provided at the end of the tail locking seat, and the end of the wire rope in the wire rope opening device is fixed on the locking shaft, so that the stroke position of the piston rod can be detected and fed back through the wire rope opening device.

[0012] Preferably, a hydraulic cylinder is fixedly provided on one side of the tail locking seat, and a radially sliding connecting rod is provided on the other side. The push rod in the hydraulic cylinder is fixedly connected to one side of the locking plate, and the connecting rod is fixedly connected to the other side of the locking plate. The locking plate can be driven to move radially by a hydraulic cylinder.

[0013] Preferably, a guide seat is fitted on the outer side of the connecting rod, and the guide seat is fixed on the tail locking seat; Multiple limit switches are provided on one side of the connecting rod. The limit switches are fixed to the tail locking seat through the connecting plate. A sensing plate is fixed at the end of the connecting rod. The sensing plate moves between the multiple limit switches to provide feedback on the position status of the locking plate.

[0014] Preferably, the locking plate is provided with a gourd hole, and a boss is fixedly provided at the end of the locking shaft. The gourd hole consists of two connected large holes and a small hole. The diameter of the locking shaft is smaller than the inner diameter of the small hole, and the diameter of the boss is larger than the inner diameter of the small hole but smaller than the inner diameter of the large hole. When the large hole and the locking shaft are coaxial, it is in an unlocked state; when the locking shaft enters the large hole and the locking plate moves radially, and the small hole and the locking shaft are coaxial, it is in a locked state.

[0015] Preferably, the base of the synchronous monitoring fall arrest device is fixed on the installation platform, and sliding support columns are fixed on both sides of the base. The tops of the sliding support columns on both sides are connected and fixed by a connecting plate. A sliding counterweight assembly is provided between the sliding support columns on both sides. One end of the top rod is fixed to the counterweight assembly, and the other end passes through the sealing cylinder on the base and is located below the installation platform. A sensor mounting plate is fixed on one side of the chute support, and multiple limit switches are provided on the sensor mounting plate. Bumpers are fixed on both sides of the bottom of the counterweight assembly. The counterweight assembly slides and causes the bumpers to touch the limit switches.

[0016] Preferably, a support platform is fixed on both sides of the middle part of the base, and a buffer pad is fixed on the support platform, with the bottom of the counterweight component abutting against the buffer pad; The counterweight assembly has sliders fixed on both sides of its bottom, and a smooth wear-resistant pad is fixed on the inner side of the slide column. The sliders slide against the wear-resistant pad. The sensor mounting plate has vertical square slots at both the top and bottom. The sensor mounting plate is connected to the slide support through the vertical square slots by bolts, which can slide to adjust the distance between the impact blocks. The sensor mounting plate has horizontal square slots on the left and right sides. The limit switches are fixed to the horizontal square slots by bolts, which can slide to adjust the distance between multiple limit switches.

[0017] The method and steps for using the anti-fall locking monitoring device for hydraulic gate hoists are as follows: S1. The gate is opened or closed by a hydraulic hoist. When the piston rod pushes the gate to move, the wire rope opening meter can provide real-time feedback on the piston rod's movement stroke, thereby monitoring the gate's opening position. S2. When the gate is fully open, the locking shaft at the tail of the piston rod enters the locking plate and drives the locking plate to move radially through the hydraulic cylinder, so that it is locked on the locking shaft, thereby locking the piston rod and keeping the gate in the fully open state. At the same time, the push of the top support column on the gate synchronously monitors the rise of the top rod in the anti-fall device, which causes the impact blocks on both sides of the counterweight component to touch multiple limit switches from bottom to top in sequence, thereby providing feedback on the direction of gate movement at this time; S3. When the gate descends due to a leak in the hydraulic system, the impact block touches the limit switch, and the signal is fed back to the control system to automatically raise the gate back to the fully open position. If the gate fails to lift automatically, the pump should be stopped immediately and an audible and visual alarm signal should be issued. S4. When the gate falls accidentally while fully open, the impact block touches the limit switch, and the signal is fed back to the control system, which immediately stops the pump and issues an audible and visual alarm signal.

[0018] This invention provides a fall-prevention locking monitoring device for hydraulic gate hoists and its usage method, with the following advantages: 1. The hydraulic gate hoist physically locks the piston rod through a tail locking seat and locking plate, ensuring the gate remains fully open even if the hydraulic system completely fails. The synchronous monitoring anti-fall device uses a counterweight, push rod, and limit switch structure, independent of the hydraulic system, forming a safety redundancy independent of the main drive system.

[0019] 2. By using four limit switches to trigger sequentially, it can not only determine whether the gate has reached the fully open position, but also identify the direction of movement. Combined with hydraulic control signals, it can intelligently determine whether the operation is abnormal. The wire rope opening gauge provides continuous stroke data, forming a dual position monitoring system with the limit switches, providing both continuous and discrete position monitoring.

[0020] 3. When an uninstructed drop is detected, the system can automatically attempt a reset and recovery; if this fails, the pump will immediately stop and an audible and visual alarm will sound to prevent the accident from escalating. The alarm logic is based on multi-sensor cross-validation, resulting in a low false alarm rate and accurate response.

[0021] 4. The number of counterweight plates in the counterweight assembly is adjustable, ensuring that the push rod can still freely respond to the gate's descent under water pressure and sealing resistance. The installation position of the limit switch can be flexibly adjusted through horizontal / vertical square slots to adapt to different working conditions and gate stroke. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure and installation of the present invention; Figure 2 This is a front view of the synchronous monitoring fall protection device of the present invention; Figure 3 This is an axonometric view of the synchronous monitoring fall protection device of the present invention; Figure 4 This is a front sectional view of the synchronous monitoring fall protection device of the present invention; Figure 5 This is a schematic diagram of the installation of the limit switch of the present invention; Figure 6 This is a front sectional view of the hydraulic gate opener of the present invention; Figure 7 This is an enlarged cross-sectional view of the tail locking seat of the present invention; Figure 8 This is the present invention. Figure 7 Sectional view of AA; In the diagram: 1. Installation platform; 2. Synchronous monitoring anti-fall device; 201. Base; 202. Slide support; 203. Connecting plate; 204. Counterweight assembly; 2041. Fixing seat; 2042. Pull rod; 2043. Slider; 2044. Counterweight plate; 205. Sensor mounting plate; 2051. Vertical square slot; 2052. Horizontal square slot; 206. Limit switch; 207. Impact block; 208. Buffer pad; 209. Top rod; 210. Sealing cylinder; 3. Hydraulic gate opener; 301. Cylinder; 302. End cover; 303. Piston rod; 304. Tail locking seat; 305. Piston; 306. Hydraulic cylinder; 307. Synchronization mechanism; 3071. Guide seat; 3072. Connecting rod; 3073. Limit switch; 3074. Sensing plate; 308. Wire rope opening meter; 309. Locking shaft; 310. Locking plate; 4. Top support column; 5. Gate; 6. Hinge seat; 7. Hinge lug. Detailed Implementation

[0023] Example 1 like Figures 1-8 As shown, the anti-fall locking monitoring device for the hydraulic gate hoist includes a synchronous monitoring anti-fall device 2 and a hydraulic gate hoist 3 installed side by side on the installation platform 1. The piston rod 303 of the hydraulic gate hoist 3 passes through the installation platform 1 and is hinged to the gate 5. The top rod 209 of the synchronous monitoring anti-fall device 2 passes through the installation platform 1 and is located below it. A top support column 4 is fixed on the gate 5. When the gate 5 is lifted under the drive of the hydraulic gate hoist 3, the top support column 4 abuts against the top rod 209, thereby providing feedback on the lifting position of the gate 5 in the synchronous monitoring anti-fall device 2. The hydraulic gate hoist 3 is also equipped with a locking mechanism at its tail end, which is used to lock the piston rod 303 in the hydraulic gate hoist 3 after the gate 5 is lifted.

[0024] like Figure 1 As shown, gate 5 is opened and closed by a hydraulic hoist 3 positioned below the installation platform 1. When gate 5 rises, the top support column 4 on gate 5 pushes the top rod 209 in the synchronous monitoring and anti-fall device 2, thereby triggering multiple limit switches 206 of the synchronous monitoring and anti-fall device 2, providing feedback on the raised position of gate 5. In the fully open state of gate 5, the piston rod 303 is locked by a locking mechanism at the tail of the hydraulic hoist 3, achieving mechanical locking. The synchronous monitoring and anti-fall device 2 can monitor the fully open position of gate 5, preventing unit malfunctions due to hydraulic system failure or accidental fall of gate 5. It can also promptly control the unit to stop and issue audible and visual alarms based on the signals from the limit switches 206.

[0025] like Figure 6 As shown, the top of the cylinder 301 in the hydraulic gate hoist 3 is connected to the mounting platform 1 through the end cover 302, and the end of the piston rod 303 slides against the cylinder 301 through the piston 305. The tail locking seat 304 in the locking mechanism is fixed to the bottom of the cylinder 301. The locking shaft 309 at the end of the piston rod 303 enters the tail locking seat 304 when the gate 5 is lifted. The tail locking seat 304 is provided with a radially sliding locking plate 310, which is sleeved on the locking shaft 309 to lock it.

[0026] When the hydraulic gate hoist 3 drives the piston rod 303 to raise the gate 5 to the fully open state, the locking shaft 309 at the end of the piston rod 303 enters the locking plate 310 in the tail locking seat 304. The locking plate 310 moves radially and locks itself on the locking shaft 309, thus mechanically locking the gate 5 to the fully open state.

[0027] The inner side of the end cap 302 abuts against the piston rod 303 through a sealing assembly. The end of the piston rod 303 is fixed with a hinge ear 7, which is hinged to the hinge seat 6 on the gate 5 through a pin.

[0028] like Figures 6-7 As shown, a wire rope opening meter 308 is fixedly installed at the end of the tail locking seat 304. The end of the wire rope in the wire rope opening meter 308 is fixed on the locking shaft 309, so that the stroke position of the piston rod 303 can be detected and fed back through the wire rope opening meter 308.

[0029] like Figures 7-8 As shown, a hydraulic cylinder 306 is fixedly installed on one side of the tail locking seat 304, and a radially sliding connecting rod 3072 is provided on the other side. The push rod in the hydraulic cylinder 306 is fixedly connected to one side of the locking plate 310, and the connecting rod 3072 is fixedly connected to the other side of the locking plate 310. The locking plate 310 can be driven to move radially by the hydraulic cylinder 306.

[0030] The locking plate 310 is connected to the connecting rod 3072 and the push rod in the hydraulic cylinder 306 on both sides respectively. The push rod in the hydraulic cylinder 306 is used to drive the locking plate 310 to move, and the connecting rod 3072 follows to ensure the stability of the movement of the locking plate 310.

[0031] A guide seat 3071 is fitted on the outer side of the connecting rod 3072, and the guide seat 3071 is fixed on the tail locking seat 304. Multiple limit switches 3073 are provided on one side of the connecting rod 3072. The limit switches 3073 are fixed to the tail locking seat 304 through the connecting plate. A sensing plate 3074 is fixed at the end of the connecting rod 3072. The sensing plate 3074 moves between the multiple limit switches 3073 to provide feedback on the position status of the locking plate 310.

[0032] The hydraulic cylinder 306 drives the locking plate 310 to move, and the connecting rod 3072 moves accordingly, simultaneously causing the sensing plate 3074 to contact different limit switches 3073, thereby providing feedback on the position status of the locking plate 310. In this example, there are two limit switches 3073, which are used to provide feedback on the locked and unlocked states of the locking plate 310, respectively.

[0033] like Figure 8 As shown, the locking plate 310 is provided with a gourd hole, and the end of the locking shaft 309 is fixed with a boss. The gourd hole consists of two connected large holes and a small hole. The diameter of the locking shaft 309 is smaller than the inner diameter of the small hole, and the diameter of the boss is larger than the inner diameter of the small hole but smaller than the inner diameter of the large hole. When the large hole and the locking shaft 309 are coaxial, it is in an unlocked state; when the locking shaft 309 enters the large hole and the locking plate 310 moves radially, and the small hole and the locking shaft 309 are coaxial, it is in a locked state.

[0034] like Figures 2-3 As shown, the base 201 of the synchronous monitoring fall protection device 2 is fixed on the installation platform 1. Slide support columns 202 are fixed on both sides of the base 201, and the tops of the slide support columns 202 on both sides are connected and fixed by a connecting plate 203. A sliding counterweight assembly 204 is provided between the sliding support columns 202 on both sides. One end of the top rod 209 is fixed on the counterweight assembly 204, and the other end passes through the sealing cylinder 210 on the base 201 and is located below the mounting platform 1. A sensor mounting plate 205 is fixed on one side of the slide support 202. Multiple limit switches 206 are provided on the sensor mounting plate 205. Bumpers 207 are fixed on both sides of the bottom of the counterweight assembly 204. The counterweight assembly 204 slides to drive the bumpers 207 to touch the limit switches 206.

[0035] The fixed base 2041 in the counterweight assembly 204 has a pull rod 2042 inserted on both sides. Multiple counterweight plates 2044 are stacked on the pull rod 2042. The ends of the pull rod 2042 are locked with nuts to the multiple counterweight plates 2044. The number of counterweight plates 2044 is adjusted according to the actual situation. It is necessary to ensure that the top rod 209 can overcome water pressure and sealing resistance and fall freely.

[0036] like Figures 2-4 As shown, a support platform is fixed on both sides of the middle part of the base 201, and a buffer pad 208 is fixed on the support platform. The bottom of the counterweight component 204 abuts against the buffer pad 208. The counterweight assembly 204 has sliders 2043 fixed on both sides of the bottom, and a smooth wear-resistant pad is fixed on the inner side of the slide column 202. The sliders 2043 slide against the wear-resistant pad. The sensor mounting plate 205 has vertical square slots 2051 at both the top and bottom. The sensor mounting plate 205 is connected to the slide support 202 by bolts passing through the vertical square slots 2051, and the distance between the distance blocks 207 can be adjusted by sliding. The sensor mounting plate 205 has horizontal square slots 2052 on the left and right sides. The limit switches 206 are fixed to the horizontal square slots 2052 by bolts, and the distance between multiple limit switches 206 can be adjusted by sliding.

[0037] In this example, there are four limit switches 206 on the sensor mounting plate 205. By touching multiple limit switches 206 in sequence, the direction of movement of the gate 5 is determined. Combined with whether the hydraulic control push signal and the lifting signal are consistent, the system can then provide feedback on whether the gate 5 is operating normally. If a fault is detected, the system will promptly send feedback to the control system to stop the unit and issue an audible and visual alarm.

[0038] The trigger signal includes two scenarios. First, when a hydraulic system leak causes the gate 5 to slowly descend, triggering only the upper limit switch 206, it promptly signals a restart of the hydraulic system, lifting the gate 5 back to the fully open position. If it cannot automatically reset and continues to descend, touching the next limit switch 206, it promptly controls the unit to stop the pump and issues an audible and visual alarm. Second, when an unexpected event causes the gate 5 to fall rapidly, triggering all limit switches 206, the remote control room and local control cabinet issue audible and visual alarms, and the signal is routed to the computer monitoring system, causing the unit and ball valve to shut down urgently.

[0039] Example 2 like Figures 1-3 As shown in Example 1, the method of using the anti-fall locking monitoring device for the hydraulic gate is further explained, and the steps are as follows: S1. The gate 5 is opened or closed by the hydraulic hoist 3. When the piston rod 303 pushes the gate 5 to move, the wire rope opening meter 308 can provide real-time feedback on the movement stroke of the piston rod 303, thereby monitoring the opening position of the gate 5. S2. When the gate 5 is fully open, the locking shaft 309 at the tail of the piston rod 303 enters the locking plate 310 and drives the locking plate 310 to move radially through the hydraulic cylinder 306, so that it is locked on the locking shaft 309, thereby locking the piston rod 303 and keeping the gate 5 in the fully open state. At the same time, the top support column 4 on the gate 5 pushes the top rod 209 in the synchronous monitoring anti-fall device 2 to rise, which causes the impact blocks 207 on both sides of the counterweight component 204 to touch multiple limit switches 206 from bottom to top, thereby providing feedback on the direction of movement of the gate 5 at this time. S3. When the gate 5 descends due to a leak in the hydraulic system, the impact block 207 touches the limit switch 206, and the signal is fed back to the control system to automatically lift the gate 5 back to the fully open position. If the gate 5 fails to lift automatically, the pump should be stopped immediately and an audible and visual alarm signal should be issued. S4. When the gate 5 falls accidentally while fully open, the impact block 207 touches the limit switch 206, and the signal is fed back to the control system, which promptly stops the pump and issues an audible and visual alarm signal.

[0040] 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 fall-prevention locking monitoring device for hydraulic gate hoists, characterized in that: The device includes a synchronous monitoring anti-fall device (2) and a hydraulic hoist (3) installed side by side on the installation platform (1). The piston rod (303) of the hydraulic hoist (3) passes through the installation platform (1) and is hinged to the gate (5). The top rod (209) of the synchronous monitoring anti-fall device (2) passes through the installation platform (1) and is located below it. A top support column (4) is fixed on the gate (5). When the gate (5) is lifted by the hydraulic hoist (3), the top support column (4) abuts against the top rod (209), thereby providing feedback on the lifting position of the gate (5) in the synchronous monitoring anti-fall device (2). The hydraulic gate hoist (3) is also equipped with a locking mechanism at the tail end, which is used to lock the piston rod (303) in the hydraulic gate hoist (3) after the gate (5) is lifted.

2. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 1, characterized in that: The top of the cylinder (301) in the hydraulic gate hoist (3) is connected to the mounting platform (1) through the end cover (302), and the end of the piston rod (303) slides against the cylinder (301) through the piston (305); The tail locking seat (304) in the locking mechanism is fixed to the bottom of the cylinder (301). The locking shaft (309) at the end of the piston rod (303) enters the tail locking seat (304) when the gate (5) is lifted. The tail locking seat (304) is provided with a radially sliding locking plate (310), which is fitted onto the locking shaft (309) to lock it.

3. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 2, characterized in that: The inner side of the end cap (302) abuts against the piston rod (303) through a sealing assembly. The piston rod (303) is fixed with a hinge ear (7) at the end. The hinge ear (7) is hinged to the hinge seat (6) on the gate (5) through a pin.

4. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 2, characterized in that: A wire rope opening gauge (308) is fixed at the end of the tail locking seat (304). The end of the wire rope in the wire rope opening gauge (308) is fixed on the locking shaft (309), so that the stroke position of the piston rod (303) can be detected and fed back through the wire rope opening gauge (308).

5. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 2, characterized in that: A hydraulic cylinder (306) is fixedly installed on one side of the tail locking seat (304), and a radially sliding connecting rod (3072) is provided on the other side. The push rod in the hydraulic cylinder (306) is fixedly connected to one side of the locking plate (310), and the connecting rod (3072) is fixedly connected to the other side of the locking plate (310). The locking plate (310) can be driven to move radially by a hydraulic cylinder (306).

6. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 5, characterized in that: A guide seat (3071) is fitted on the outside of the connecting rod (3072), and the guide seat (3071) is fixed on the tail locking seat (304); Multiple limit switches (3073) are provided on one side of the connecting rod (3072). The limit switches (3073) are fixed on the tail locking seat (304) through the connecting plate. A sensing plate (3074) is fixed at the end of the connecting rod (3072). The sensing plate (3074) moves between the multiple limit switches (3073) to provide feedback on the position status of the locking plate (310).

7. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 2, characterized in that: The locking plate (310) is provided with a gourd hole, and the locking shaft (309) is fixed with a boss at the end. The gourd hole is two connected large holes and small holes. The diameter of the locking shaft (309) is smaller than the inner diameter of the small hole, and the diameter of the boss is larger than the inner diameter of the small hole but smaller than the inner diameter of the large hole. When the large hole and the locking shaft (309) are coaxial, it is in an unlocked state; when the locking shaft (309) enters the large hole and the locking plate (310) moves radially, when the small hole and the locking shaft (309) are coaxial, it is in a locked state.

8. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 1, characterized in that: The base (201) of the synchronous monitoring fall protection device (2) is fixed on the installation platform (1). The base (201) is fixed with sliding support columns (202) on both sides. The tops of the sliding support columns (202) on both sides are connected and fixed by connecting plates (203). A sliding counterweight assembly (204) is provided between the sliding support columns (202) on both sides. One end of the top rod (209) is fixed on the counterweight assembly (204), and the other end passes through the sealing cylinder (210) on the base (201) and is located below the installation platform (1). A sensor mounting plate (205) is fixed on one side of the slide support (202). Multiple limit switches (206) are provided on the sensor mounting plate (205). Bumpers (207) are fixed on both sides of the bottom of the counterweight assembly (204). The counterweight assembly (204) slides and drives the bumpers (207) to touch the limit switches (206).

9. The anti-fall locking monitoring device for the hydraulic gate hoist according to claim 8, characterized in that: The base (201) has a support platform fixed on both sides of the middle part, and a buffer pad (208) is fixed on the support platform. The bottom of the counterweight component (204) abuts against the buffer pad (208). The counterweight assembly (204) has sliders (2043) fixed on both sides of the bottom, and a smooth wear-resistant pad is fixed on the inner side of the slide column (202). The sliders (2043) slide against the wear-resistant pad. The sensor mounting plate (205) has vertical square slots (2051) at both the top and bottom. The sensor mounting plate (205) is connected to the slide support (202) by bolts through the vertical square slots (2051), and the distance between the distance blocks (207) can be adjusted by sliding. The sensor mounting plate (205) has horizontal square slots (2052) on the left and right sides. The limit switches (206) are fixed on the horizontal square slots (2052) by bolts, and the distance between multiple limit switches (206) can be adjusted by sliding.

10. The method of using the anti-fall locking monitoring device for the hydraulic gate hoist according to any one of claims 1 to 9, wherein the method steps are as follows: S1. The gate (5) is opened or closed by the hydraulic hoist (3). When the piston rod (303) pushes the gate (5) to move, the wire rope opening meter (308) can provide real-time feedback on the movement of the piston rod (303) and thus monitor the opening position of the gate (5). S2. When the gate (5) is fully open, the locking shaft (309) at the tail of the piston rod (303) enters the locking plate (310) and drives the locking plate (310) to move radially through the hydraulic cylinder (306), so that it is locked on the locking shaft (309) to lock the piston rod (303), thereby keeping the gate (5) locked in the fully open state. At the same time, the top support column (4) on the gate (5) pushes the top rod (209) in the synchronous monitoring anti-fall device (2) to rise, thereby causing the impact blocks (207) on both sides of the counterweight assembly (204) to touch multiple limit switches (206) from bottom to top, thus providing feedback on the direction of movement of the gate (5) at this time; S3. When the gate (5) descends due to leakage in the hydraulic system, the impact block (207) touches the limit switch (206), and the signal is fed back to the control system to automatically lift the gate (5) back to the fully open position. If the gate (5) fails to lift automatically, the pump should be stopped immediately and an audible and visual alarm signal should be issued. S4. When the gate (5) falls accidentally while fully open, the impact block (207) touches the limit switch (206), and the signal is fed back to the control system, which stops the pump in time and issues an audible and visual alarm signal.

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