Governor booster lock pin block anti-falling device
By designing a combination of locking pins, screws, locking rods, and limiting components, the problem of accidental insertion of locking blocks into the relay device was solved, achieving safe support and anti-falling functions for the locking blocks, and ensuring the safe and stable operation of the hydropower station.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YALONG RIVER HYDROPOWER DEV CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing technology, the lead screw of the lock ingot device of the relay of Jinping II Hydropower Station is prone to breakage due to vibration and fatigue, which may cause the lock ingot block to be mistakenly put into the relay, resulting in piston rod damage and sealing oil leakage, or even unit accident.
A device to prevent accidental falling of the locking block of a speed regulator relay is designed. Through the combination of two locking pins, a screw, a locking rod and a limiting component, the locking block is supported on the relay housing when the screw breaks, preventing it from falling onto the piston rod. The space limitation problem is solved by adjusting the orientation of the pin opening by rotating the component.
It effectively prevents the lock block from being accidentally put into the relay, avoids damage to the piston rod and oil leakage from the seal, ensures the safe operation of the unit, and extends the service life of the equipment.
Smart Images
Figure CN224532875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of governor relay devices in hydropower stations, and specifically discloses a device for preventing accidental falling of the locking block of a governor relay device. Background Technology
[0002] The Jinping II Hydropower Station has a locking device at the rear of both the governor and the servo motor. The servo motor engages the locking device when the guide vanes are fully closed and when the guide vanes are fully open. When engaged, the servo motor will be unable to operate, serving as a safety measure for personnel working at the guide vane crank arm position. However, if the locking device is accidentally engaged when the guide vanes are not in the fully open or fully closed position, it will interfere with the movement of the servo motor's piston rod, causing damage to the piston rod and seals, resulting in significant oil leakage. In severe cases, this can lead to servo motor jamming, abnormal unit power regulation, or even unit runaway. Therefore, it is essential to implement measures to prevent the locking device from accidentally engaging.
[0003] Currently, the locking device of the relay generator at the Jinping II Hydropower Station connects the locking blocks to the lead screw. The locking device is engaged or disengaged by manually rotating the lead screw. When the locking device is disengaged, the locking blocks are lifted by the lead screw, and their weight is entirely borne by the lead screw. However, the unit experiences constant-frequency vibration during operation, which may cause the lead screw of the locking device to break, resulting in the locking blocks being mistakenly engaged in the relay generator. Furthermore, the lead screw may suffer fatigue defects due to long-term stress, which may also cause the lead screw of the locking device to break, resulting in the locking blocks being mistakenly engaged in the relay generator. Utility Model Content
[0004] The purpose of this utility model is to provide a device to prevent accidental drop of locking blocks in speed regulator relays, thereby solving the problem of accidental insertion of locking blocks into relays and speed regulators.
[0005] The specific solution of this utility model is as follows:
[0006] A device for preventing accidental falling of locking pin blocks in a speed controller or relay is provided to prevent locking pin blocks from accidentally falling into the speed controller or relay. The device includes two locking pins, a screw, a locking rod, and a limiting member. Both ends of the two locking pins are provided with pin holes. The screw passes through the pin holes at one end of the two locking pins in sequence and is limited by nuts welded to both ends of the screw. One end of the locking rod is provided with a limiting cap, and the other end of the locking rod is provided with a limiting hole. The other end of the locking rod passes through the pin holes at the other end of the two locking pins in sequence and is detachably connected to the limiting member through the limiting hole.
[0007] In some embodiments, a rotating member is provided on the end of one of the two locking pins near the locking rod. The rotating member is provided with a pin opening, and rotating the rotating member can arbitrarily change the orientation of the pin opening.
[0008] In some embodiments, the lower end of the rotating component is provided with an external thread, the upper end of the rotating component is provided with a pin opening, and the end of the locking pin near the locking rod is provided with an internal thread. The external thread and the internal thread are connected by a threaded connection, so that the pin opening at the upper end of the rotating component is aligned with the pin opening at the end of another locking pin near the locking rod.
[0009] In some embodiments, the limiting element is a padlock.
[0010] In some embodiments, the limiting element is a U-lock.
[0011] In some embodiments, the locking pin is a locking pin made of stainless steel tubing.
[0012] In some embodiments, the locking block is symmetrically provided with through holes for passing through two locking pins, and the servo includes a servo housing and a piston rod. The distance from the through hole to the lower end of the locking block is less than the distance from the upper end of the servo housing to the upper end of the piston rod.
[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0014] 1. This utility model uses two locking pins passing through the through holes on the locking block. One end of the two locking pins is fixedly connected by a screw and a nut, and the other end of the two locking pins is fixedly connected by a locking rod and a limiting member. When the locking block is in the withdrawn state of the relay and the screw breaks, causing the locking block to fall, the two ends of the two locking pins support it on the relay housing, preventing the locking block from falling onto the piston rod of the relay. The limiting member also achieves the locking function, preventing accidental human intervention that could cause the locking block to fall onto the piston rod of the relay, thus effectively preventing the locking block from being accidentally engaged in the relay or speed controller.
[0015] 2. The orientation of the pin opening can be changed arbitrarily by rotating the rotating part, which solves the problem that the locking rod is limited by space and cannot be directly inserted into the pin opening of the locking pin. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a speed regulator relay locking block anti-fall device in an embodiment of this utility model.
[0017] Figure 2 This is a left view of a speed regulator relay lock block anti-fall device after installation in an embodiment of this utility model.
[0018] Figure 3 This is a right view of a speed regulator relay lock block anti-fall device after installation in an embodiment of this utility model.
[0019] Reference numerals: 1-Locking pin, 2-Pin port, 3-Screw, 4-Nut, 5-Locking rod, 6-Limit cap, 7-Limit hole, 8-Limiting component, 9-Rotating component, 10-Lead screw, 11-Locking block, 12-Relay housing, 13-Piston rod. Detailed Implementation
[0020] The specific implementation method is described below with reference to the accompanying drawings.
[0021] A device for preventing accidental falling of locking blocks in a speed controller or relay is provided to prevent locking blocks 11 from accidentally falling into the speed controller or relay. Figure 1 , Figure 2 and Figure 3 As shown, it includes two locking pins 1, a screw 3, a locking rod 5, and a limiting member 8. Both ends of the two locking pins are provided with pin holes 2. The screw 3 passes through the pin holes 2 at one end of the two locking pins in sequence and is limited by nuts 4 welded to both ends of the screw. One end of the locking rod is provided with a limiting cap 6, and the other end of the locking rod is provided with a limiting hole 7. The other end of the locking rod passes through the pin holes at the other end of the two locking pins in sequence and is detachably connected to the limiting member 8 through the limiting hole 7.
[0022] Two locking pins 1 pass through the through holes on the locking block. One end of the two locking pins is fixedly connected by a screw 3 and a nut 4, and the other end of the two locking pins is fixedly connected by a locking rod 5 and a limiting member 8. When the locking block 11 is in the withdrawn state of the relay and the screw breaks, causing the locking block to fall, the two ends of the two locking pins support it on the relay housing, preventing the locking block from falling onto the piston rod of the relay. The limiting member 8 also achieves the locking function, preventing accidental human intervention that could cause the locking block to fall onto the piston rod of the relay, thus effectively preventing the locking block from being accidentally engaged in the relay or speed controller.
[0023] The diameter of the locking pin can be 20mm; both the relay and the speed controller are equipped with locking devices at their rear ends. The locking device includes a locking block 11 and a lead screw 10. The upper end of the locking block is connected to the lower end of the lead screw. When the locking device is in the state of being out of the relay, the locking block is lifted by the lead screw. The device of this utility model is used to prevent the locking block 11 from accidentally falling into the speed controller and the relay.
[0024] In some embodiments, a rotating member 9 is provided on the end of one of the two locking pins near the locking rod. The rotating member is provided with a pin opening 2. Rotating the rotating member 9 can arbitrarily change the orientation of the pin opening.
[0025] By rotating the rotating part 9, the orientation of the pin opening can be changed arbitrarily, which solves the problem that the locking rod is limited in space and cannot be directly inserted into the pin opening of the locking pin.
[0026] Among them, a rotating part 9 can be installed at a position 35mm from the end of the locking pin.
[0027] In some embodiments, the lower end of the rotating component is provided with an external thread, the upper end of the rotating component is provided with a pin port 2, and the end of the locking pin near the locking rod is provided with an internal thread. The external thread and the internal thread are connected by thread, so that the pin port 2 at the upper end of the rotating component is aligned with the pin port 2 at the end of the other locking pin near the locking rod, so that the locking rod can pass smoothly through the two pin ports without being restricted by space.
[0028] In some embodiments, the limiting member 8 is a padlock.
[0029] In some embodiments, the limiting element 8 is a U-lock.
[0030] In some embodiments, the locking pin 1 is a locking pin made of stainless steel tubing.
[0031] Locking pins made of stainless steel tubing have the characteristics of strong load-bearing capacity, oxidation resistance, and corrosion resistance, which enhance the support and reliability of the device and extend its service life.
[0032] In some embodiments, the lock block is symmetrically provided with through holes for passing through two lock pins, and the relay includes a relay housing 12 and a piston rod 13. The distance from the through hole to the lower end of the lock block is less than the distance from the upper end of the relay housing to the upper end of the piston rod.
[0033] The distance from the through hole to the lower end of the locking block is less than the distance from the upper end of the servo housing to the upper end of the piston rod. This ensures that when the locking block falls and is supported on the servo housing by the two ends of the locking rods, there is a certain distance between the lower end of the locking block and the upper end of the piston rod. This ensures that the piston rod 13 can continue to operate safely and effectively prevents the locking block from being accidentally engaged in the servo.
[0034] Generally, the locking blocks of the speed controller and the relay have the same external dimensions. The length of the locking block can be 175mm, the width can be 180mm, and the height can be 380mm. Two through holes for the locking pins to pass through can be drilled symmetrically at a position 200mm from the top line of the locking block and 45mm from the sides of the locking block. The diameter of the through holes can be 20.5mm. This ensures that when the lead screw breaks and the locking block falls, the distance between the lower end face of the locking block and the piston rod is greater than 30mm, ensuring the safe operation of the piston rod 13 and effectively preventing the locking block from falling on the piston rod of the relay and damaging the relay.
[0035] The usage process of a speed regulator relay locking block anti-accidental drop device:
[0036] Two locking pins 1 are passed through the two through holes in the locking block, and the screw 3 is passed through the pin holes 2 at one end of the two locking pins in sequence. Nuts 4 are put on both ends of the two locking pins and welded to the locking pins 1, so that the nuts 4 and the locking pins 1 are fixedly connected in a non-removable manner, thus firmly fixing the two locking pins 1 to the screw. Then, the rotating part 9 on the locking pin is rotated so that the pin hole faces up or down. The end of the locking rod with the limit hole is passed through the pin hole 2 on the rotating part. The rotating part 9 is rotated so that the orientation of the pin hole is consistent with the orientation of the pin hole on the other locking pin. The locking rod 5 is passed through the pin hole 2 on the other locking pin, which solves the problem that the locking rod is limited in space and cannot be directly inserted into the pin hole 2 of the locking pin. Finally, the limiting part 8 is passed through the limiting hole 7 to lock. A padlock or U-lock can be passed through the limiting hole 7 to lock, which prevents the locking block from falling onto the piston rod of the relay due to human error. When the locking block 11 is in the withdrawn state and the screw breaks, causing the locking block to fall, it is supported on the servo housing by the two ends of the two locking pins, preventing the locking block from falling onto the piston rod of the servo, thus effectively preventing the locking block from being accidentally put into the servo.
[0037] This utility model is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.
Claims
1. A device for preventing accidental falling of locking blocks in a speed governor or relay, used to prevent locking blocks from accidentally falling into the speed governor or relay, characterized in that: It includes two locking pins, a screw, a locking rod, and a limiting member. Both ends of the two locking pins are provided with pin holes. The screw passes through the pin holes at one end of the two locking pins in sequence and is limited by nuts welded to both ends of the screw. One end of the locking rod is provided with a limiting cap, and the other end of the locking rod is provided with a limiting hole. The other end of the locking rod passes through the pin holes at the other end of the two locking pins in sequence and is detachably connected to the limiting member through the limiting hole.
2. The speed regulator relay locking block anti-accidental drop device according to claim 1, characterized in that: One of the two locking pins has a rotating component near the locking rod end, and the rotating component has a pin opening. Rotating the rotating component can arbitrarily change the orientation of the pin opening.
3. The speed regulator relay locking block anti-accidental drop device according to claim 2, characterized in that: The lower end of the rotating component is provided with an external thread, the upper end of the rotating component is provided with a pin opening, and the end of the locking pin near the locking rod is provided with an internal thread. The external thread and the internal thread are connected by a threaded connection, so that the pin opening at the upper end of the rotating component is aligned with the pin opening at the end of another locking pin near the locking rod.
4. The speed regulator relay locking block anti-accidental drop device according to claim 1, characterized in that: The limiting component is a padlock.
5. The speed regulator relay locking block anti-accidental drop device according to claim 1, characterized in that: The limiting component is a U-shaped lock.
6. The speed regulator relay locking block anti-accidental drop device according to claim 1, characterized in that: The locking pin is a locking pin made of stainless steel tubing.
7. The speed regulator relay locking block anti-accidental drop device according to claim 1, characterized in that: The locking block is symmetrically provided with through holes for passing through two locking pins. The relay includes a relay housing and a piston rod. The distance from the through hole to the lower end of the locking block is less than the distance from the upper end of the relay housing to the upper end of the piston rod.