Large-diameter rotor mounting pit steel cover plate

Abstract

The utility model relates to a large-diameter rotor mounting pit steel cover plate. The method is suitable for the technical field of hydropower construction. The technical problem to be solved by the utility model is to provide the large-diameter rotor mounting pit steel cover plate. According to the technical scheme, the large-diameter rotor installation pit steel cover plate is characterized in that the large-diameter rotor installation pit steel cover plate comprises a steel plate structure which comprises a first steel plate and a second steel plate, and the second steel plate is correspondingly arranged below the first steel plate; the supporting framework structure is arranged between the first steel plate and the second steel plate, and the top and the bottom of the supporting framework structure are correspondingly connected with the first steel plate and the second steel plate respectively; and the lifting lug structure is arranged on the steel plate structure, and the lifting lug structure is used for lifting the whole structure.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower construction, in particular to a steel cover plate for a large-diameter rotor installation pit. Background Art

[0002] Hydropower projects are limited by the height limit of underground powerhouse cavern excavation. When the generator rotor main shaft is assembled on site, a down-dug installation pit needs to be set up and used for later maintenance. However, during the operation of the power station, the rotor installation pit needs to be sealed with a cover. The rotor installation pit is generally circular with a diameter of 4 to 6 meters. The steel cover needs to withstand a load of no more than 5kN / m. 2 Ordinary steel covers cannot meet the load and deformation requirements and require special design. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the above-mentioned problems, a steel cover plate for a large-diameter rotor installation pit is provided.

[0004] The technical solution adopted by the utility model is: a large diameter rotor installation pit steel cover plate, characterized by comprising:

[0005] The steel plate structure comprises a first steel plate and a second steel plate, wherein the second steel plate is correspondingly arranged below the first steel plate;

[0006] a supporting skeleton structure, disposed between the first steel plate and the second steel plate, wherein the top and bottom of the supporting skeleton structure are respectively connected to the first steel plate and the second steel plate;

[0007] A lifting lug structure is provided on the steel plate structure, and the lifting lug structure is used to lift the entire structure.

[0008] Through the above technical means, a supporting frame structure is set between the first steel plate and the second steel plate. The supporting frame structure can support the first steel plate and the second steel plate. Compared with ordinary single-layer steel plates, the bearing capacity of the structure is effectively improved.

[0009] In some embodiments, the supporting skeleton structure includes an inner support steel plate, anchoring steel bars and an outer ring channel steel. The bottom of the first steel plate is connected to the inner support steel plate, and the top of the second steel plate is connected to the anchoring steel bar. The anchoring steel bar is drilled into the inner support steel plate, and the circumference between the first steel plate and the second steel plate is connected via the outer ring channel steel.

[0010] In some embodiments, the inner supporting steel plates are arranged in a vertical and horizontal manner, so that a grid structure is formed between the first steel plate and the second steel plate.

[0011] In some embodiments, the thickness of the inner support steel plate is 10 mm, the anchor steel bar is made of round steel with a diameter of 8 mm, and the height of the inner support steel plate and the outer ring channel steel are both 50 mm.

[0012] In some embodiments, the spacing between the inner supporting steel plates is 30 cm, and the spacing between the anchoring steel bars is 15 cm.

[0013] In some embodiments, the ear structure includes a nut, a fixing bolt and a steel plate ring, the nut is connected between the first steel plate and the second steel plate, the nut is threadedly connected to the fixing bolt, and the end of the fixing bolt is connected to the steel plate ring.

[0014] In some embodiments, the thread diameter of the nut is 24 mm.

[0015] In some embodiments, the first steel plate is a patterned color steel plate, the second steel plate is a common steel plate, and the thickness of the first steel plate and the second steel plate are both not less than 5 mm.

[0016] The beneficial effects of the utility model are:

[0017] 1. By installing a support frame structure between the first and second steel plates, a grid-like structure is formed between the first and second steel plates. The support frame structure effectively distributes the load. The double-layer steel plates plus the support frame structure provide strong compressive strength and low deformation rate. The lifting lug structure facilitates the lifting and movement of the entire steel cover structure. Furthermore, this structure is simple to manufacture and can be prefabricated in a factory, making on-site assembly relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the planar structure of this application.

[0019] Figure 2 It is a schematic diagram of the partial cross-sectional structure of this application.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure along the A direction.

[0021] Figure 4 It is a schematic diagram of the partial planar structure of the lifting ear structure in this application.

[0022] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the lifting ear structure in this application.

[0023] Description of reference numerals:

[0024] 1. First steel plate; 2. Second steel plate; 3. Outer ring channel steel; 4. Inner support steel plate; 5. Anchor steel bar; 6. Nut; 7. Steel plate lifting ring; 8. Fixing bolt.

[0025] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures, or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0026] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0027] “First,” “second,” etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0029] Combine Figures 1 to 5 As shown, this embodiment is a large-diameter rotor mounting pit steel cover plate, including a steel plate structure, a supporting frame structure and a lifting ear structure. The steel plate structure includes a first steel plate 1 and a second steel plate 2. The second steel plate 2 is correspondingly arranged below the first steel plate 1. A supporting frame structure is provided between the first steel plate 1 and the second steel plate 2. The top of the supporting frame structure is connected to the bottom of the first steel plate 1, and the bottom of the supporting frame structure is connected to the top of the second steel plate 2. A lifting ear structure is also provided on the steel plate structure, and the lifting ear structure is used to lift the entire structure.

[0030] Furthermore, in this embodiment, the first steel plate 1 is a patterned color steel plate, and the second steel plate 2 is a common steel plate. The thickness of the first steel plate 1 and the second steel plate 2 is not less than 5 mm.

[0031] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 As shown, the supporting skeleton structure includes an inner support steel plate 4, anchor steel bars 5 and an outer ring channel steel 3. The inner support steel plate 4 is welded to the bottom of the first steel plate 1, and the top of the second steel plate 2 is connected to the anchor steel bar 5. The anchor steel bar 5 is drilled into the inner support steel plate 4, and the circumference between the first steel plate 1 and the second steel plate 2 is connected through the outer ring channel steel 3.

[0032] Furthermore, the inner supporting steel plates 4 are arranged in a vertical and horizontal manner, so that a grid structure is formed between the first steel plate 1 and the second steel plate 2 .

[0033] Furthermore, the thickness of the inner support steel plate 4 is 10 mm, the anchor steel bar 5 is made of round steel with a diameter of 8 mm, and the height of the inner support steel plate 4 and the outer ring channel steel 3 are both 50 mm.

[0034] Furthermore, the spacing between the inner support steel plates 4 is 30 cm, and the spacing between the anchoring steel bars 5 is 15 cm.

[0035] The second steel plate 2 is drilled and fixed on the inner supporting steel plate 4 by the anchoring steel bars 5, which can reduce the welding workload and thus improve the product manufacturing efficiency.

[0036] In some embodiments, as Figure 4 and Figure 5 As shown, the lifting lug structure includes a nut 6, a fixing bolt 8, and a steel plate lifting eye 7. The nut 6 is connected between the first steel plate 1 and the second steel plate 2. Specifically, the ends of the nut 6 are welded to the first steel plate 1 and the second steel plate 2, respectively, and the side wall of the nut 6 is welded to the inner support steel plate 4. The nut 6 is threadedly connected to the fixing bolt 8, and the steel plate lifting eye 7 is welded to the end of the fixing bolt 8. Specifically, the thread diameter of the nut 6 in this embodiment is 24 mm. During the lifting operation, the fixing bolt 8 and the nut 6 are tightened together.

[0037] The inner support steel plate 4 and anchoring steel bars 5 form a grid-like structure between the first and second steel plates 1 and 2, effectively distributing the load. The double-layer steel plates and the intermediate support skeleton provide strong compressive strength and low deformation rate, increasing the stability of the overall steel cover structure. The lifting lug design also facilitates removal of the steel cover for maintenance, improving operational efficiency.

[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large diameter rotor installation pit steel cover, characterized in that: include: A steel plate structure comprising a first steel plate (1) and a second steel plate (2), wherein the second steel plate (2) is correspondingly arranged below the first steel plate (1); A supporting skeleton structure is provided between the first steel plate (1) and the second steel plate (2), wherein the top and the bottom of the supporting skeleton structure are respectively connected to the first steel plate (1) and the second steel plate (2); A lifting lug structure is provided on the steel plate structure, and the lifting lug structure is used to lift the entire structure.

2. A large diameter rotor installation pit steel cover according to claim 1, characterized in that: The supporting skeleton structure includes an inner supporting steel plate (4), anchoring steel bars (5) and an outer ring channel steel (3). The bottom of the first steel plate (1) is connected to the inner supporting steel plate (4), and the top of the second steel plate (2) is connected to the anchoring steel bar (5). The anchoring steel bar (5) is drilled into the inner supporting steel plate (4) accordingly. The circumference between the first steel plate (1) and the second steel plate (2) is connected via the outer ring channel steel (3).

3. The large diameter rotor installation pit steel cover according to claim 2, characterized in that: The inner supporting steel plates (4) are arranged in a vertical and horizontal manner, so that a grid-like structure is formed between the first steel plate (1) and the second steel plate (2).

4. The large diameter rotor installation pit steel cover according to claim 2, characterized in that: The thickness of the inner supporting steel plate (4) is 10 mm, the anchoring steel bar (5) is made of round steel with a diameter of 8 mm, and the heights of the inner supporting steel plate (4) and the outer ring channel steel (3) are both 50 mm.

5. The large diameter rotor installation pit steel cover according to claim 2, characterized in that: The spacing between the inner supporting steel plates (4) is 30 cm, and the spacing between the anchoring steel bars (5) is 15 cm.

6. The large diameter rotor installation pit steel cover according to claim 1, characterized in that: The lifting ear structure includes a nut (6), a fixing bolt (8) and a steel plate lifting ring (7); the nut (6) is connected between the first steel plate (1) and the second steel plate (2); the nut (6) is threadedly connected to the fixing bolt (8); and the end of the fixing bolt (8) is connected to the steel plate lifting ring (7).

7. The large diameter rotor installation pit steel cover according to claim 6, characterized in that: The thread diameter of the nut (6) is 24 mm.

8. The large diameter rotor installation pit steel cover according to claim 1, characterized in that: The first steel plate (1) is a patterned colored steel plate, and the second steel plate (2) is an ordinary steel plate. The thickness of the first steel plate (1) and the second steel plate (2) is not less than 5 mm.

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