Hydraulic cylinder turnover limiting device for accident door

Abstract

The utility model provides a kind of accident door hydraulic cylinder turning over limiting device, positioning outer frame is fixedly connected with rotating lever on both sides of the positioning outer frame, the surface of one rotating lever is provided with several limiting holes, and the inside of one limiting hole is inserted with limiting mechanism;The bottom of positioning outer frame is overlapped with pedestal;The surface of pedestal is overlapped with dismounting mechanism on both sides;Limiting mechanism includes the positioning pin inserted in the inside of limiting hole, and the top of positioning pin is fixedly connected with hydraulic rod;The side of hydraulic rod is electrically connected with PLC controller by power line, when turning over to suitable angle, PLC controller controls driving motor to stop, and drives the hydraulic rod on the top of rotating lever to start, and hydraulic rod drives the positioning pin on the bottom to insert into the limiting hole provided on the surface of rotating lever, to realize secondary limiting to the hydraulic cylinder after turning over, less operator, good limiting, high safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of emergency gate limiters in hydropower stations, and relates to an emergency gate hydraulic cylinder overturning limiter. Background Technology

[0002] In the maintenance process of hydraulic cylinders for large emergency gates in hydropower stations, the overturning operation is a critical and high-risk procedure. As large, precision hydraulic components, hydraulic cylinders can be several meters long and often weigh several tons, with irregularly shaped parts such as piston rods and end caps connected to both ends, resulting in a highly uneven distribution of gravity. During maintenance, the hydraulic cylinder must be flipped from a vertical position to a horizontal position or a specific tilt angle (such as 45°) to allow for inspection and repair of concealed parts such as the bottom of the cylinder and the piston rod sealing cavity. This process places stringent requirements on the stability of the overturning, the accuracy of the angle, and the reliability of the limit switches.

[0003] Traditional hydraulic cylinder turning operations mostly rely on manual labor in conjunction with cranes, with rudimentary limiting methods and extremely poor safety. Early methods often involved binding the cylinder with wire ropes before hoisting and turning, with manual pulling of the cables controlling the turning speed and angle. This not only made precise control of the turning angle difficult (often with errors exceeding ±10°), but also risked the cylinder suddenly falling due to wire rope slippage. In some scenarios, simple supports were used with wooden wedges and iron blocks for limiting, but wooden wedges are prone to deformation and failure under stress, and iron blocks cannot adapt to the fixed requirements of different turning angles. Furthermore, these are all passive limiting methods, unable to actively stop the turning action when the preset angle is reached, easily leading to angle overshoot due to inertia, causing cylinder collisions or component damage. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an emergency door hydraulic cylinder tilting limit device that requires fewer operators, has good limiting effect, and is highly safe.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an emergency door hydraulic cylinder tilting and limiting device, which positions an outer frame, and rotating rods are fixedly connected to both sides of the positioning outer frame. Several limiting holes are opened on the surface of one of the rotating rods, and a limiting mechanism is inserted into the interior of one of the limiting holes. A base is attached to the bottom of the positioning outer frame; disassembly and assembly mechanisms are attached to both sides of the surface of the base; the limiting mechanism includes a positioning pin inserted into the limiting hole, and a hydraulic rod is fixedly connected to the top of the positioning pin; a PLC controller is electrically connected to one side of the hydraulic rod via a power line; an angle sensor is electrically connected to one side of the PLC controller via a power line; and a drive motor is electrically connected to the other side of the PLC controller via a power line.

[0006] The disassembly and assembly mechanism includes a pressure frame that overlaps the base surface. An electric push rod is fixedly connected to the bottom of the pressure frame, and a battery is electrically connected to one side of the electric push rod via a power line.

[0007] The output end of the drive motor is fixedly connected to one side of the rotating rod, and a placement plate is fixedly connected to the bottom of the drive motor.

[0008] The base is supported by a support platform at its bottom, and a limit post is fixedly connected to the surface of the support platform.

[0009] The base has a limiting hole on its surface, and the size of the limiting hole is adapted to that of the limiting post.

[0010] The bottom of the support platform is fixedly connected to a vertical plate, and the two sides of the vertical plate are fixedly connected to reinforcing ribs.

[0011] The bottom of the upright plate is fixedly connected to a base, and the surface of the base is provided with threaded posts.

[0012] One side of the rotating rod is rotatably connected to a rotating shaft, and one side of the rotating shaft is fixedly connected to a fixing plate.

[0013] The main beneficial effects of this utility model are as follows: By setting up a limiting mechanism, during use, the drive motor on one side is started according to the actual flipping requirements. The drive motor drives the hydraulic cylinder on the positioning outer frame to rotate. Since an angle sensor is set on the positioning outer frame, when the rotation reaches the appropriate angle, the PLC controller controls the drive motor to stop and drives the hydraulic rod at the top of the rotating rod to start. The hydraulic rod drives the positioning pin at the bottom to insert into the limiting hole opened on the surface of the rotating rod, thereby realizing secondary limiting of the hydraulic cylinder after flipping. This effectively avoids the slippage risk caused by relying solely on the braking of the drive motor and significantly improves the stability of the hydraulic cylinder after flipping.

[0014] By designing a disassembly and assembly mechanism, the limit device requires regular replacement and maintenance during long-term use. Therefore, pressure frames are installed on both sides of the base. Driven by an electric push rod, the upper limit post of the support platform at the bottom of the base is first inserted into the limit hole on the base surface for initial positioning. Next, the electric push rod at the bottom is rotated, causing the pressure frame connected to the top of the electric push rod to rotate to the upper surface of the base. Finally, the electric push rod is retracted, causing the pressure frame to press against the base at the bottom and reinforce the positioned base. This achieves rapid disassembly and assembly of the limit device without the need for bolts, improving the installation efficiency for installers. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the limiting mechanism of this utility model.

[0018] Figure 3 This is a schematic diagram of the disassembly and assembly mechanism of this utility model.

[0019] Figure 4 This is a schematic diagram of the positioning outer frame structure of this utility model.

[0020] In the diagram: 1. Positioning outer frame; 2. Rotating rod; 3. Limiting mechanism; 301. Positioning pin; 302. Hydraulic rod; 303. PLC controller; 304. Angle sensor; 305. Drive motor; 4. Base; 5. Disassembly and assembly mechanism; 501. Lower pressure frame; 502. Electric push rod; 503. Battery; 6. Placement plate; 7. Support platform; 8. Limiting post; 9. Vertical plate; 10. Reinforcing rib; 11. Base; 12. Threaded post; 13. Rotating shaft; 14. Fixing plate. Detailed Implementation

[0021] like Figures 1-4 In this invention, a locking device for disassembling a hydraulic cylinder used to clamp an emergency door includes a positioning outer frame 1. Rotating rods 2 are fixedly connected to both sides of the positioning outer frame 1. Several limiting holes are formed on the surface of one of the rotating rods 2, and a limiting mechanism 3 is inserted into the interior of one of the limiting holes. The limiting mechanism 3 provides secondary limiting for the overturned hydraulic cylinder, effectively avoiding the slippage risk caused by relying solely on the braking of the drive motor 305, and significantly improving the stability of the hydraulic cylinder after overturning. A base 4 is attached to the bottom of the positioning outer frame 1, and disassembly and assembly mechanisms 5 are attached to both sides of the surface of the base 4. The disassembly and assembly mechanisms 5 enable quick disassembly and assembly of the limiting device without the need for bolts, thus improving the installation efficiency of the installers.

[0022] Example 1, like Figures 1-4 In the middle, the limiting mechanism 3 includes a positioning pin 301 inserted into the limiting hole. A hydraulic rod 302 is fixedly connected to the top of the positioning pin 301. A PLC controller 303 is electrically connected to one side of the hydraulic rod 302 via a power line. An angle sensor 304 is electrically connected to one side of the PLC controller 303 via a power line. A drive motor 305 is electrically connected to the other side of the PLC controller 303 via a power line.

[0023] The disassembly and assembly mechanism 5 includes a pressure frame 501 that overlaps the surface of the base 4. An electric push rod 502 is fixedly connected to the bottom of the pressure frame 501. A battery 503 is electrically connected to one side of the electric push rod 502 via a power line.

[0024] The output end of the drive motor 305 is fixedly connected to one side of the rotating rod 2, and the bottom of the drive motor 305 is fixedly connected to the placement plate 6. The placement plate 6 serves to support the drive motor 305.

[0025] A support platform 7 is attached to the bottom of the base 4. A limit post 8 is fixedly connected to the surface of the support platform 7. The limit post 8 serves to limit the position of the base 4.

[0026] Limiting holes are provided on the surface of the base 4. The limiting holes are adapted to the size of the limiting post 8. The limiting holes serve to limit the position of the limiting post 8.

[0027] The bottom of the support platform 7 is fixedly connected to the upright plate 9, and the two sides of the upright plate 9 are fixedly connected to the reinforcing ribs 10. The reinforcing ribs 10 are used to improve the structural strength of the upright plate 9.

[0028] The bottom of the upright plate 9 is fixedly connected to a base 11. The surface of the base 11 is provided with threaded posts 12, which serve to fix the base 11.

[0029] One of the rotating rods 2 is rotatably connected to a rotating shaft 13 on one side, and a fixing plate 14 is fixedly connected to one side of the rotating shaft 13. The fixing plate 14 serves to support the rotating shaft 13.

[0030] Example 2, The working steps of this device are as follows: First step: When in use, start the drive motor 305 on one side according to the actual flipping requirements. The drive motor 305 drives the hydraulic cylinder on the positioning outer frame 1 to rotate. Since the positioning outer frame 1 is equipped with an angle sensor 304, when it is flipped to a suitable angle, the PLC controller 303 controls the drive motor 305 to stop and drives the hydraulic rod 302 at the top of the rotating rod 2 to start. The hydraulic rod 302 drives the positioning pin 301 at the bottom to insert into the limiting hole opened on the surface of the rotating rod 2. The second step: When the limiting device is used for a long time, it needs to be replaced and maintained regularly. Therefore, a pressure frame 501 is set on both sides of the base 4. The pressure frame 501 is driven by an electric push rod 502. First, the upper limit column 8 of the support platform 7 connected to the bottom of the base 4 is inserted into the limiting hole opened on the surface of the base 4 for initial positioning. Then, the electric push rod 502 at the bottom is rotated so that the pressure frame 501 connected to the top of the electric push rod 502 rotates to the upper surface of the base 4. Finally, the electric push rod 502 is retracted. The electric push rod 502 drives the pressure frame 501 to press the bottom of the base 4 and reinforce the positioned base 4.

[0031] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The embodiments and features described in this application can be arbitrarily combined without conflict. The protection scope of this utility model should be defined as the technical solution 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 protection scope of this utility model.

Claims

1. An emergency door hydraulic cylinder tilting limit device, characterized in that: It has a positioning outer frame, on both sides of which are fixedly connected to rotating rods. One of the rotating rods has several limiting holes on its surface, and a limiting mechanism is inserted into one of the limiting holes. A base is attached to the bottom of the positioning outer frame. Disassembly and assembly mechanisms are attached to both sides of the base surface. The limiting mechanism includes a positioning pin inserted into the limiting hole, and a hydraulic rod is fixedly connected to the top of the positioning pin. One side of the hydraulic rod is electrically connected to a PLC controller via a power line. One side of the PLC controller is electrically connected to an angle sensor via a power line. The other side of the PLC controller is electrically connected to a drive motor via a power line.

2. The emergency door hydraulic cylinder tilting limit device according to claim 1, characterized in that: The disassembly and assembly mechanism includes a pressure frame that overlaps the base surface. An electric push rod is fixedly connected to the bottom of the pressure frame, and a battery is electrically connected to one side of the electric push rod via a power line.

3. The emergency door hydraulic cylinder tilting limit device according to claim 1, characterized in that: The output end of the drive motor is fixedly connected to one side of the rotating rod, and a placement plate is fixedly connected to the bottom of the drive motor.

4. The emergency door hydraulic cylinder tilting limit device according to claim 1, characterized in that: The base is supported by a support platform at its bottom, and a limit post is fixedly connected to the surface of the support platform.

5. The emergency door hydraulic cylinder tilting limit device according to claim 1, characterized in that: The base has a limiting hole on its surface, and the size of the limiting hole is adapted to that of the limiting post.

6. The emergency door hydraulic cylinder tilting limit device according to claim 4, characterized in that: The bottom of the support platform is fixedly connected to a vertical plate, and the two sides of the vertical plate are fixedly connected to reinforcing ribs.

7. The emergency door hydraulic cylinder tilting limit device according to claim 6, characterized in that: The bottom of the upright plate is fixedly connected to a base, and the surface of the base is provided with threaded posts.

8. The emergency door hydraulic cylinder tilting limit device according to claim 1, characterized in that: One side of the rotating rod is rotatably connected to a rotating shaft, and one side of the rotating shaft is fixedly connected to a fixing plate.

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