Quick opening cover plate for vertical shaft of tubular turbine unit

Abstract

The utility model provides a kind of fast opening cover plate of vertical shaft manhole of tubular unit, including the base being arranged at vertical shaft opening, the movable cover plate being arranged at the upper portion of base opening, the locking structure for locking the position of cover plate, the elastic pull rod for moving the cover plate of unlocked locking structure, by setting locking structure on cover plate, foot pedal and pull ring are set on locking structure, when stepping pedal or hand pulling pull ring, cover plate locking structure is unlocked, cover plate can be automatically opened under the action of elastic pull rod, so compared with electric control cover plate, even in the case of power failure, also do not affect the opening of cover plate, facilitate staff to enter vertical shaft.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for motor shafts, and in particular to a quick-opening cover plate for a manhole of a axial flow unit shaft. Background Technology

[0002] A cover plate structure is installed at the opening of the vertical shaft. This cover plate is located in a key passage for personnel to enter and exit the relevant areas of the generator unit. In actual operation and maintenance scenarios, when it is necessary to carry out inspection and maintenance work on the generator unit, personnel must enter and exit the bubble head and bubble body area of ​​the generator unit through the vertical shaft, and at this time, it is necessary to open this cover plate.

[0003] The current cover design is a push-pull steel grating structure, which meets daily usage needs to a certain extent. However, most existing covers open automatically. But in actual equipment maintenance, situations often require power outages. Once the power is off, the existing automatic control covers cannot open properly due to the lack of power support. This undoubtedly creates a significant obstacle for maintenance personnel entering the shaft, seriously affecting the smooth progress of maintenance work and overall operation and maintenance efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a quick-opening cover for the manhole of a vertical shaft of a cross-flow turbine unit, which solves the problem that the cover cannot be opened when the power is off.

[0005] To solve the above-mentioned technical problems, this utility model provides a quick-opening cover for the manhole of a vertical shaft of a cross-flow turbine unit, including a base set at the opening of the vertical shaft, a movable cover set above the opening of the base, a locking structure for locking the position of the cover, and an elastic pull rod for moving the cover with the unlocked locking structure.

[0006] In a preferred embodiment, a guide rail is provided on the base, and a roller matching the guide rail is provided on one side of the cover plate.

[0007] In a preferred embodiment, the locking structure includes a fixed shaft disposed on the cover plate, a barb rotatably mounted on the fixed shaft, a first tension spring disposed above the barb and connected to the cover plate, a protrusion disposed below the base and matching the barb, and also includes a pedal disposed above the barb and offset from the vertical position of the fixed shaft, and a pull ring disposed below the barb and offset from the vertical position of the fixed shaft.

[0008] In a preferred embodiment, the elastic rod includes a fixed rod mounted on the base and an extension rod connected to the cover plate, as well as a second tension spring with one end fixed to the fixed rod and the other end fixed to the extension rod.

[0009] In the preferred embodiment, the cover plate is grid-shaped, and a handrail is also provided at the opening of the base.

[0010] In the preferred embodiment, an L-shaped guard plate is also provided on one side of the guide rail.

[0011] The beneficial effects of this utility model are as follows: by setting a locking structure on the cover plate, and setting a foot pedal and a pull ring on the locking structure, when the foot pedal is stepped on or the pull ring is pulled by hand, the cover plate locking structure is unlocked, and the cover plate can be automatically opened under the action of the elastic pull rod. In this way, compared with the electrically controlled cover plate, even in the event of a power outage, the opening of the cover plate is not affected, making it convenient for workers to enter the shaft. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0013] Figure 1 This is a first axonometric structural diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a second axonometric structural diagram of an embodiment of the present invention;

[0015] Figure 3 This is an enlarged side view of the locking structure according to an embodiment of the present invention;

[0016] Figure 4 This is a structural diagram of the elastic tie rod according to an embodiment of the present invention;

[0017] Figure 5 This is a structural diagram of the elastic tie rod according to an embodiment of the present invention.

[0018] Reference numerals: Base 11; Cover plate 12; Guide rail 13; Roller 14; Handrail 15; Locking structure 2; Fixed shaft 21; Barb 22; First tension spring 23; Protrusion 24; Pedal 25; Pull ring 26; Elastic pull rod 3; Fixed rod 31; Extension rod 32; Second tension spring 33; L-shaped guard plate 34. Detailed Implementation

[0019] Please see Figure 1-5 As shown, the present application provides a technical solution: a quick-opening manhole cover for a vertical shaft of a cross-flow turbine unit, including a base 11 disposed at the opening of the vertical shaft, a movable cover 12 disposed above the opening of the base 11, a locking structure 2 for locking the position of the cover 12, and an elastic pull rod 3 for moving the cover 12 after the locking structure 2 has been unlocked.

[0020] In a preferred embodiment, a guide rail 13 is provided on the base 11, and a roller 14 matching the guide rail 13 is provided on one side of the cover plate 12.

[0021] Rollers 14 are respectively arranged on both sides of the cover plate 12, so that the cover plate 12 can move along the base 11 via the guide rail 13 and the rollers 14, thereby opening or closing the opening on the base 11.

[0022] In a preferred embodiment, the locking structure 2 includes a fixed shaft 21 disposed on the cover plate 12, a barb 22 rotatably mounted on the fixed shaft 21, a first tension spring 23 disposed above the barb 22 and connected to the cover plate 12, a protrusion 24 disposed below the base 11 and matching the barb 22, and also includes a pedal 25 disposed above the barb 22 and offset from the vertical position of the fixed shaft 21, and a pull ring 26 disposed below the barb 22 and offset from the vertical position of the fixed shaft 21.

[0023] When the worker is above the cover plate 12, they can step on the pedal 25, causing the hook 22 to rotate around the fixed shaft 21. The hook 22 can then disengage from the protrusion 24, effectively releasing it. Similarly, when the worker is below the cover plate 12, they can pull the ring 26, causing the hook 22 to rotate around the fixed shaft 21. The hook 22 can then disengage from the protrusion 24, allowing the cover plate 12 to move. When the ring 26 is released, if the cover plate 12 does not move, the hook 22 can rotate around the fixed shaft 21 and re-hook below the protrusion 24 under the action of the first tension spring 23, effectively locking the cover plate.

[0024] In a preferred embodiment, the elastic rod 3 includes a fixed rod 31 mounted on the base 11 and an extension rod 32 connected to the cover plate 12, as well as a second tension spring 33 with one end fixed to the fixed rod 31 and the other end fixed to the extension rod 32.

[0025] When the cover plate 12 is locked, the elastic lever 3 is extended. When the foot pedal 25 is pressed, the barb 22 has disengaged from the protrusion 24, and the elastic lever 3 can automatically open the cover plate 12, saving the staff from having to open the cover plate by themselves and saving effort.

[0026] In the preferred embodiment, the cover plate 12 is grid-shaped, and a handrail 15 is also provided at the opening of the base 11.

[0027] Handrail 15 is provided for easy hand gripping when exiting the shaft.

[0028] In the preferred embodiment, an L-shaped guard plate 34 is also provided on one side of the guide rail 13.

[0029] An L-shaped guard plate 34 is provided to protect the guide rail 13 and roller 14 from damage by external objects.

[0030] The device is used in the following way: when the foot pedal 25 is stepped on or the hand pull ring 26 is pulled, the cover plate locking structure 2 is unlocked, and the cover plate 12 can be automatically opened under the action of the elastic pull rod 3. Compared with the electrically controlled cover plate, even in the event of a power outage, the opening of the cover plate is not affected, making it convenient for workers to enter the shaft.

[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 protection scope of this utility model should be 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. A quick-opening manhole cover for a vertical shaft of a once-through turbine generator unit, characterized in that: It includes a base (11) set at the opening of the shaft, a movable cover plate (12) set above the opening of the base (11), a locking structure (2) for locking the cover plate (12) in position, and an elastic pull rod (3) for moving the cover plate (12) that has been unlocked by the locking structure (2).

2. The quick-opening manhole cover for a vertical shaft of a once-through turbine unit according to claim 1, characterized in that: A guide rail (13) is provided on the base (11), and a roller (14) matching the guide rail (13) is provided on one side of the cover plate (12).

3. The quick-opening manhole cover for a vertical shaft of a once-through turbine unit according to claim 1, characterized in that: The locking structure (2) includes a fixed shaft (21) disposed on the cover plate (12), a barb (22) rotatably mounted on the fixed shaft (21), a first tension spring (23) disposed above the barb (22) and connected to the cover plate (12), a protrusion (24) disposed below the base (11) and matching the barb (22), and also includes a pedal (25) disposed above the barb (22) and offset from the vertical position of the fixed shaft (21), and a pull ring (26) disposed below the barb (22) and offset from the vertical position of the fixed shaft (21).

4. The quick-opening manhole cover for a vertical shaft of a once-through turbine unit according to claim 1, characterized in that: The elastic rod (3) includes a fixed rod (31) mounted on the base (11) and an extension rod (32) connected to the cover plate (12), as well as a second tension spring (33) with one end fixed to the fixed rod (31) and the other end fixed to the extension rod (32).

5. The quick-opening manhole cover for a vertical shaft of a once-through turbine unit according to claim 1, characterized in that: The cover plate (12) is grid-shaped, and a handrail (15) is provided at the opening of the base (11).

6. The quick-opening manhole cover for a vertical shaft of a once-through turbine unit according to claim 2, characterized in that: An L-shaped guard plate (34) is also provided on one side of the guide rail (13).

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