Hydraulic turbine generator unit head cover access door lock self-locking device

Abstract

The utility model discloses a water turbine generator unit machine head cover access door lock self locking device, including door body structure, rotation cooperation department, rotating part and eccentric lock tongue, the through -hole who is connected with rotation spare part department is provided on the door body structure, the rotating part is swinged and is arranged in rotation cooperation department, eccentric lock tongue is connected with rotating part, this scheme is driven eccentric lock tongue to rotate through rotation and makes the door frame structure to be clamped into between eccentric lock tongue and door body structure, because of the existence of eccentric lock tongue, when manual locking, eccentric lock tongue relies on gravity and friction force to realize locking, the gravity of eccentric lock tongue is downward at this time, because generator unit is in the vibration state for a long time, eccentric lock tongue will vibrate synchronously, and the clearance between door frame and door body structure is gradually reduced, while the clearance is gradually reduced, eccentric lock tongue, under the condition of being vibrated, will continue to move downward, and gradually locks, realizes self locking.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for hydro-generator sets, and specifically relates to a self-locking device for the access door of the turbine head cover of a hydro-generator set. Background Technology

[0002] The access door to the turbine generator unit's head cover serves as a crucial passage for inspection and maintenance. The reliability of its lock structure directly impacts the safe and stable operation of the internal equipment. Currently, various lock structures exist, including common types such as bolt-type, padlock-type, and mechanical locks, all widely used for locking the head cover access door. However, these traditional locking methods, especially under the continuous vibration environment generated by the turbine generator unit's operation, have shown inherent limitations over long-term use, leading to a series of safety hazards. Firstly, due to the unavoidable vibrations during unit operation, the locking force of the lock gradually weakens, resulting in a decrease in the latch's tightness and the possibility of the latch tongue loosening or even completely dislodging. This locking failure not only risks the access door opening unexpectedly, but more seriously, there is a significant risk that detached latch tongues and other critical components could fall into the high-speed rotating parts of the unit, potentially causing equipment jamming, mechanical collisions, and other serious accidents, severely threatening the safe operation of the entire generator unit. Utility Model Content

[0003] The purpose of this utility model is to provide a self-locking device for the access door of a hydro-generator unit's head cover, in order to address the above-mentioned shortcomings. This solves the problem in the prior art that due to the unavoidable vibrations during unit operation, the locking force of the door lock gradually weakens, resulting in a decrease in the fastening effect of the latch and the easy loosening or even complete dislocation of the latch tongue.

[0004] This utility model is achieved through the following solution: A self-locking device for the entrance door of a hydro-generator unit includes a door structure, a rotating fitting part, a rotating component, and an eccentric locking tongue; the door structure is provided with a through hole for connecting to the rotating fitting part, the rotating component is movably disposed in the rotating fitting part, and the eccentric locking tongue is connected to the rotating component.

[0005] Based on the structure of the above-mentioned self-locking device for the entrance door of a hydro-generator unit head cover, the rotating fitting part is a bushing, the rotating part is rotatably arranged in the bushing, and the bushing is fixedly connected to the door structure.

[0006] Based on the structure of the above-mentioned self-locking device for the access door of a hydro-generator unit head cover, the rotating component includes a rotating handrail, a rotating rod, and a stop block. The rotating handrail is disposed at one end of the rotating rod, the stop block is disposed between the rotating handrail and the rotating rod, and the rotating rod passes through a bushing.

[0007] Based on the structure of the above-mentioned self-locking device for the entrance door lock of a hydro-generator unit head cover, the eccentric lock tongue is generally a semi-circular structure, and the cross-sectional end of the eccentric lock tongue is set as a semi-circular wedge structure.

[0008] Based on the structure of the above-mentioned self-locking device for the entrance door of a hydro-generator unit, the eccentric locking tongue specifically includes a first end, a second end, and a connecting hole. The projection of the eccentric locking tongue on the water surface is a semi-circular structure. The connecting hole is located at the center of the eccentric locking tongue and is connected to the rotating rod. The thickness of the eccentric locking tongue gradually decreases from the first end to the second end.

[0009] Based on the structure of the above-mentioned self-locking device for the entrance door lock of a hydro-generator unit head cover, a center line is provided on the eccentric lock tongue, and the center line is located close to the first end.

[0010] Based on the structure of the self-locking device for the entrance door of the turbine generator head cover described above, the rotating handrail is a rectangular structure, and a marking line collinear with the center line is provided on the rotating handrail.

[0011] Based on the structure of the above-mentioned self-locking device for the entrance door of a hydro-generator unit head cover, a vertical auxiliary line is also provided on the door structure.

[0012] Based on the structure of the above-mentioned self-locking device for the access door of a hydro-generator unit head cover, the distance between the abutment block and the connecting hole is 1.1 times the length of the bushing.

[0013] Based on the structure of the self-locking device for the entrance door of the turbine generator set, the rotating handrail has an arc-shaped chamfer on its side.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1) When using this solution, rotation will cause the eccentric locking tongue to rotate, so that the door frame structure is locked between the eccentric locking tongue and the door structure. Due to the presence of the eccentric locking tongue, when manually locking, the eccentric locking tongue relies on gravity and friction to lock. At this time, the center of gravity of the eccentric locking tongue is downward. Since the generator unit is in a state of vibration for a long time, the eccentric locking tongue will vibrate synchronously, gradually reducing the gap between the door frame and the door structure. As the gap gradually decreases, the eccentric locking tongue will continue to move downward under the vibration and gradually lock, achieving self-locking.

[0015] 2) Ease of maintenance: All door lock components adopt a split modular design, and each component is easy to disassemble and install, reducing maintenance costs and workload. 3) Operational reliability: The device has a reasonable structural design and is easy to operate. Simply turning the door handle can realize the locking and unlocking functions of the door lock.

[0016] 4) Safety in use: Automatically locks itself to prevent accidental opening of the door lock due to unit vibration, environmental factors, etc.

[0017] 5) Environmental adaptability: The lock body and latch are made of high-strength alloy materials, which have good wear resistance and corrosion resistance, and can adapt to the harsh operating environment of the hydro-generator unit. Whether in the humid hydro-power station building or in the outdoor hydro-generator unit exposed to wind and rain for a long time, it can work stably and reliably. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the entire utility model; Figure 2 This is a side view of the eccentric locking tongue in water according to this utility model; Figure 3 This is a top view of the eccentric locking tongue in water according to this utility model; Figure 4 This is a schematic diagram of the structure when the present invention is used correctly; Figure 5 This is a diagram showing the positional relationship between the marking line and the center of gravity line in this utility model; Reference numerals: 1. Door structure; 2. Rotating mating part; 3. Rotating component; 4. Eccentric lock tongue; 5. Door frame; 11. Vertical auxiliary line; 31. Rotating handrail; 32. Rotating rod; 33. Abutting block; 34. Marking line; 41. First end; 42. Second end; 43. Connecting hole; 44. Center line. Detailed Implementation

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a predetermined orientation, or be constructed and operated in a predetermined orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0023] Example 1 like Figures 1-5 As shown, this utility model provides a technical solution: A self-locking device for the entrance door of a hydro-generator unit includes a door structure 1, a rotating fitting part 2, a rotating component 3, and an eccentric locking tongue 4. The door structure 1 is provided with a through hole that connects to the rotating fitting part 2, the rotating component 3 is movably disposed in the rotating fitting part 2, and the eccentric locking tongue 4 is connected to the rotating component 3.

[0024] Based on the above structure, during use, rotation will drive the eccentric locking tongue 4 to rotate, causing the door frame 5 to engage between the eccentric locking tongue 4 and the door structure 1. Due to the presence of the eccentric locking tongue 4, when manually locking, the eccentric locking tongue 4 relies on gravity and friction to lock. At this time, the center of gravity of the eccentric locking tongue 4 is downward. Since the generator unit is in a state of vibration for a long time, the eccentric locking tongue 4 will vibrate synchronously, gradually reducing the gap between the door frame 5 and the door structure 1. As the gap gradually decreases, the eccentric locking tongue 4, under the influence of vibration, will continue to move downward and gradually lock, achieving self-locking.

[0025] As an example, the rotating mating part can be a bushing, the rotating part 3 is rotatably set in the bushing, and the bushing is fixedly connected to the door structure 1. The fixed connection method can be welding, snap-fit, threaded connection, etc. As an example, the rotating component 3 may include a rotating handrail 31, a rotating rod 32, and an abutting block 33. The rotating handrail 31 is disposed at one end of the rotating rod 32, and the abutting block 33 is disposed between the rotating handrail 31 and the rotating rod 32. The rotating rod 32 passes through a bushing.

[0026] Based on the above structure, this solution uses the contact block 33 to force the rotating handrail 31 and the bushing to be spaced at a predetermined distance, thus reserving rotation space for the rotating handrail 31.

[0027] As an example, the eccentric locking tongue 4 has a semi-circular structure, specifically including a first end 41, a second end 42 and a connecting hole 43. The projection of the eccentric locking tongue 4 on the water surface is a semi-circular structure. The connecting hole 43 is located at the center of the eccentric locking tongue 4 and is connected to the rotating rod 32. The thickness of the eccentric locking tongue 4 gradually decreases from the first end 41 to the second end 42.

[0028] The cross-section of the eccentric locking tongue 4 is designed as a semi-circular wedge structure.

[0029] Based on the above structure, in this solution, the first end 41 is a thicker and heavier end, and the second end 42 is a thinner and lighter end. When locking the door structure 1, rotating the handle 31 causes the thinner and lighter second end 42 to rotate and slide into the position of contact with the door frame 5. Since the eccentric lock tongue 4 is a wedge-shaped structure, the door and the door frame 5 are locked during the gradual rotation of the eccentric lock tongue 4. During the vibration process, since the gravity of the eccentric lock tongue 4 is close to the side of the door frame 5 and downward, the first end 41 of the eccentric lock tongue 4 will contact the door frame 5 more tightly to achieve vibration locking.

[0030] As an example, a center line 44 is provided on the eccentric locking tongue 4, and the center line 44 is positioned close to the first end 41. The rotating handrail 31 can be a rectangular structure, and a marking line 34 collinear with the center line 44 is provided on the rotating handrail 31. Vertical auxiliary lines 11 can also be set on the door structure 1.

[0031] Based on the above structure, a center-of-gravity line 44 is set on the eccentric latch 4 to facilitate the marking of the rotating handle 31 later, reducing the difficulty of replacement. When locking the door, since the position of the eccentric latch 4 cannot be seen, a marking line 34 is set on the rotating handle 31. When the angle between the marking line 34 and the vertical line is closer to the door frame 5 during rotation, it indicates that the center of gravity of the eccentric latch 4 has shifted to the door frame 5, which is the correct locking position. At this position, vibration will achieve the effect of tightening the lock more with vibration. Conversely, if the angle between the marking line 34 and the vertical line is closer to the non-door frame 5 side, it indicates that the eccentric latch 4 has not reached the designated position and needs to be re-locked until the eccentric latch 4 reaches the correct position.

[0032] As an example, the distance between the abutment block 33 and the connecting hole 43 is 1.1 times the length of the bushing, which allows the entire handle to have a certain adjustment margin; it facilitates the adjustment of the position of the eccentric locking tongue 4, and also provides adjustment space for vibration deformation in the later stage.

[0033] As an example, the sides of the rotating armrest 31 are provided with rounded chamfers to improve comfort when rotating.

[0034] The eccentric latch 4, the core component of this self-locking mechanism, is welded to the end face of the linkage drive shaft. It achieves self-locking under the eccentric force of the latch 4. One end of the eccentric latch 4 is designed as a semi-circular wedge, which mates with the edge of the door frame 5. When the door handle is turned, the wedge-shaped end of the eccentric latch 4 automatically rotates to the edge of the door frame 5 under the eccentric force, achieving the self-locking function. When unlocking is required, turning the handle overcomes the eccentric force of the latch, causing the semi-circular wedge to slide out from the edge of the door frame 5, thus unlocking the door.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking device for the access door of a hydro-generator unit's head cover, characterized in that, It includes a door structure (1), a rotating fitting part (2), a rotating component (3), and an eccentric lock tongue (4); the door structure (1) is provided with a through hole connected to the rotating fitting part, the rotating component (3) is movably disposed in the rotating fitting part (2), and the eccentric lock tongue (4) is connected to the rotating component (3).

2. The self-locking device for the access door of a hydro-generator unit head cover according to claim 1, characterized in that: The rotating fitting part is a bushing, and the rotating part (3) is rotatably set in the bushing. The bushing is fixedly connected to the door structure (1).

3. The self-locking device for the access door of a hydro-generator unit head cover according to claim 2, characterized in that: The rotating component (3) includes a rotating handrail (31), a rotating rod (32), and an abutment block (33). The rotating handrail (31) is located at one end of the rotating rod (32), and the abutment block (33) is located between the rotating handrail (31) and the rotating rod (32). The rotating rod (32) passes through a bushing.

4. The self-locking device for the access door of a hydro-generator unit head cover according to claim 3, characterized in that: The eccentric locking tongue (4) is a semi-circular structure, and the cross-section of the eccentric locking tongue (4) is set as a semi-circular wedge structure.

5. The self-locking device for the access door of a hydro-generator unit head cover according to claim 4, characterized in that: The eccentric locking tongue (4) specifically includes a first end (41), a second end (42) and a connecting hole (43). The projection of the eccentric locking tongue (4) on the water surface is a semi-circular structure. The connecting hole (43) is located at the center of the eccentric locking tongue (4). The connecting hole (43) is connected to the rotating rod (32). The thickness of the eccentric locking tongue (4) gradually decreases from the first end (41) to the second end (42).

6. The self-locking device for the access door of the turbine generator head cover according to claim 5, characterized in that: The eccentric locking tongue (4) is provided with a center line (44), which is located close to the first end (41).

7. The self-locking device for the access door of a hydro-generator unit head cover according to claim 6, characterized in that: The rotating handrail (31) is a rectangular structure, and the rotating handrail (31) is provided with a marking line (34) that is collinear with the center line (44).

8. The self-locking device for the access door of a hydro-generator unit head cover according to claim 7, characterized in that: The door structure (1) is also provided with vertical auxiliary lines (11).

9. The self-locking device for the access door of a hydro-generator unit head cover according to claim 8, characterized in that: The distance between the abutment block (33) and the connecting hole (43) is 1.1 times the length of the bushing.

10. The self-locking device for the access door of a hydro-generator unit head cover according to claim 9, characterized in that: The rotating handrail (31) has an arc-shaped chamfer on its side.

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