Through type stator base foundation buttress of high-speed pumped storage generator motor

Abstract

The utility model discloses a through-type stator base foundation buttress of a high-speed pumped storage generator motor. The supporting pier is composed of a frame, a supporting pier top plate, an overhead part radial rib plate, an overhead part circumferential rib plate, an embedded part top plate, an embedded part circumferential rib plate, an embedded part radial rib plate, an inner side embedded part bottom plate, an embedded part bottom rib, an embedded part radial abutting plate and an outer side embedded part bottom plate. The full-through structure of the stator foundation buttress is achieved, it is guaranteed that eight cavities in the front bottom, the middle bottom and the rear bottom are interconnected and communicated, the whole bottom cavity of the stator foundation buttress can be rapidly filled with concrete which is not solidified, and redundant gas is squeezed along with the concrete and exhausted along the exhaust hole in the top. The problems of concrete backflow, cavities, incomplete contact and the like of the cast-in-place foundation can be effectively restrained, multiple performance indexes such as the strength and rigidity of the foundation are improved, unbalanced stress of a unit is evenly released, and the operation stability of the unit is improved.

Description

Technical Field

[0001] The utility model relates to the field of high-speed pumped-storage power generation motors, in particular to a through-type stator machine base foundation support pier for high-speed pumped-storage power generation motors. Background Art

[0002] High-speed pumped-storage generator motors play an important role in phase and frequency modulation, valley filling and peak shaving, and emergency standby of power systems. They play an extremely critical role in strengthening the stability of power systems and improving the economy of power systems. Compared with ordinary hydroelectric generators, they have more start-stop times, multiple operating modes, dual-direction operation, and dedicated start-up. With the increase in the capacity of pumped-storage generator motors and the continuous breakthrough of the so-called traditional speed limit, the development of pumped storage has gradually unlocked high head and ultra-high head hydrological conditions, and has put forward multiple dimensional requirements for the bearing capacity of the generator motor foundation. The stator frame generator motor is an important component that carries all the main components of the stator, the gravity of the upper frame, and indirectly transmits the vibration and swing of the unit. The stator frame foundation pier has the key role of raising the stator wire rods and stator core. Multiple stator frame foundation piers are immersed in the foundation concrete, and at the same time balance the harmful deformation of the stator frame itself and all loads. As the strength of the stator frame itself has approached the theoretical limit, the improvement of the material of the frame itself cannot make the relevant indicators achieve the expected effect. In this way, the focus of the breakthrough will be shifted to the pouring quality of the stator base foundation pier and foundation concrete. The concrete pouring of the entire stator base foundation pier is usually poured by grouting. The traditional structure cannot immerse and fill multiple chambers with concrete at the same time. Due to the non-penetration of multiple chambers, especially the closure of the bottom plate; coupled with the different collapse of concrete, uneven particle size, rapid solidification caused by temperature control failure, and uneven mixing, the pouring of the foundation will be affected. Therefore, it is urgent to develop a through-type stator base foundation pier. Summary of the invention

[0003] In view of this, it is urgent to provide a through-type stator machine base foundation pier with high structural strength and through chamber to ensure the safe operation of high-speed pumped storage power generation motor set. The technical scheme of the utility model is: it consists of a frame, a pier top plate, an overhead radial rib plate, an overhead circumferential rib plate, an embedded top plate, an embedded circumferential rib plate, an embedded radial rib plate, an inner embedded bottom plate, an embedded bottom rib, an embedded radial abutment plate, and an outer embedded bottom plate, wherein the embedded top plate, the embedded circumferential rib plate, the embedded radial rib plate, the inner bottom plate, the embedded bottom rib, the embedded radial abutment plate, and the outer bottom plate are welded to form a cage-type frame space to form a partial structure embedded in concrete, and then welded to the frame, the pier top plate, the overhead radial rib plate, and the overhead circumferential rib plate to form a whole.

[0004] In the above-mentioned high-speed pumped storage generator motor through-type stator machine base foundation pier, the four corners of the frame are cut into inner rounded welding holes, rectangular holes are processed at equal distances from the frame edge, the four corners of the rectangular holes are rounded to release stress, and a single-sided groove is opened on the frame edge.

[0005] In the above-mentioned high-speed pumped-storage generator motor through-type stator base foundation pier, a centripetal arc of a certain size is processed on the outer circle side of the pier top plate, and the arc size depends on the outer circle size of the stator base lower ring. Four threaded holes distributed at equal intervals are processed in the middle of the pier top plate. The stator base and the stator base foundation pier are fixed together by bolts and nuts. After the stator base and the stator base foundation pier are fixed together to the specified tightening torque, they are radially drilled and twisted at the connection after being deviated to a certain distance, and the positioning pins are lap-welded on the stator foundation pier.

[0006] In the above-mentioned high-speed pumped storage generator motor through-type stator base foundation pier, the four corners of the overhead circumferential rib plate are cut into inwardly rounded welding holes, and the edge of the overhead circumferential rib plate is provided with double-sided grooves.

[0007] In the above-mentioned high-speed pumped storage generator motor through-type stator machine base foundation pier, two rows of equidistant first through holes are opened in the middle of the top plate of the embedded part, and two second through holes are processed after overall welding and the surrounding areas are scraped flat.

[0008] In the above-mentioned high-speed pumped storage generator motor through-type stator base foundation pier, the four corners of the embedded circumferential rib plate are cut into inner rounded welding holes, a third through hole is processed in the middle, and a single-sided groove is opened on the edge.

[0009] In the above-mentioned high-speed pumped-storage generator motor through-type stator machine base foundation pier, the embedded radial rib plate is processed with two fourth through holes at a position avoiding the welding of the embedded circumferential rib plate.

[0010] In the above-mentioned high-speed pumped storage generator motor through-type stator machine base foundation pier, the inner embedded part bottom plate is processed with two first rectangular holes at a position avoiding the embedded part radial rib plate and the embedded part bottom rib welding, and the four corners of the first rectangular holes are rounded to release stress.

[0011] In the above-mentioned high-speed pumped storage generator motor through-type stator machine base foundation pier, the outer embedded part bottom plate is processed with two second rectangular holes at a position avoiding the embedded part radial rib plate and the embedded part bottom rib welding, and the four corners of the second rectangular holes are rounded to release stress.

[0012] Due to the adoption of the above scheme, the beneficial effects of the utility model are:

[0013] 1. The overall structure of the utility model is simple, and the processing operation is hole processing, which only needs to control the strength of the material itself and the welding quality, reducing the difficulty of the processing technology.

[0014] 2. The stator foundation pier in the utility model is a full-through structure: the two bottom plates have large waist holes, there is a natural gap between the bottom plates, and the three bottom ribs connect the entire bottom frame to form a bottom cavity; the circumferential ribs and radial ribs are all provided with circular holes to ensure that the eight chambers in the front, middle and rear bottom are interconnected and connected, and the frame structure embedded in the concrete is riveted in the concrete. While ensuring the structural strength, the unsolidified concrete can quickly fill the entire bottom cavity of the stator foundation pier, and the redundant gas is squeezed with the concrete and exhausted along the top exhaust hole. It can effectively suppress the problems of backflow, cavity, incomplete contact of the on-site cast foundation concrete, improve multiple performance indicators such as foundation strength and stiffness, evenly release the unbalanced stress of the unit, and improve the stability of the unit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief introduction to the drawings required for the embodiments:

[0016] Figure 1 This is a cross-sectional structural detail of the foundation pier of the through-type stator frame of the high-speed pumped storage generator motor;

[0017] Figure 2 This is the front view structural detail of the foundation pier of the through-type stator frame of the high-speed pumped storage generator motor;

[0018] Figure 3 This is a top view structural detail of the foundation pier of the through-type stator frame of the high-speed pumped storage generator motor;

[0019] Figure 4 This is a detailed structural drawing of the through-type stator base foundation pier of the high-speed pumped storage generator motor from an upward perspective;

[0020] Figure 5 This is a schematic diagram of the beveling of the rib plate of the foundation pier of the through-type stator base of the high-speed pumped storage generator motor.

[0021] Description of component numbers in the figure:

[0022] 1-frame; 2-buttress top plate; 3-overhead radial ribs; 4-overhead circumferential ribs; 5-embedded top plate; 6-embedded circumferential ribs; 7-embedded radial ribs; 8-inner embedded bottom plate; 9-embedded bottom ribs; 10-embedded radial abutment; 11-outer embedded bottom plate; 12-welding hole; 13-rectangular cavity; 14-single-sided groove; 15-centripetal arc; 16-threaded hole; 17-locating pin; 18-double-sided groove; 19-first through hole; 20-second through hole; 21-third through hole; 22-fourth through hole; 23-first rectangular hole; 24-second rectangular hole. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solution of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] like Figures 1 to 5 As shown, a high-speed pumped storage power generation motor through-type stator machine base foundation pier is composed of a frame 1, a pier top plate 2, an overhead radial rib plate 3, an overhead circumferential rib plate 4, an embedded top plate 5, an embedded circumferential rib plate 6, an embedded radial rib plate 7, an inner embedded bottom plate 8, an embedded bottom rib 9, an embedded radial abutment plate 10, and an outer embedded bottom plate 11. The embedded top plate 5, the embedded circumferential rib plate 6, the embedded radial rib plate 7, the inner embedded bottom plate 8, the embedded bottom rib 9, the embedded radial abutment plate 10, and the outer embedded bottom plate 11 are welded to form a cage-type frame, which constitutes a partial structure embedded in concrete and is then welded to the frame 1, the pier top plate 2, the overhead radial rib plate 3, and the overhead circumferential rib plate 4 to form a whole.

[0025] Furthermore, the four corners of the frame are cut into inner rounded welding holes 12, which is beneficial to improving the continuity of the welding operation. A large rectangular cavity 13 equidistant from the edge of the frame 1 is processed as an exhaust channel for the overhead part and a witness monitoring of the fixation quality of the stator base and the stator base foundation pier. The four corners of the rectangular cavity 13 are rounded to release stress, and a single-sided groove 14 is opened on the edge of the frame 1 to facilitate single-sided welding.

[0026] Furthermore, a centripetal arc 15 of a certain size needs to be processed on the outer circle side of the pier top plate 2. The size of the arc depends on the outer circle size of the lower ring of the stator base. The same arc size and tolerance zone connection does not produce an obvious boss, which is convenient for subsequent radial processing operations. Four threaded holes 16 are processed in the middle of the pier top plate 2 and are evenly distributed. They are used to fix the stator base and the stator base foundation pier with bolts and nuts. After the stator base and the stator base foundation pier are fixed to the specified tightening torque, they are radially drilled and twisted at a certain distance at the connection, and the positioning pins 17 are lap-welded on the stator foundation pier to facilitate on-site installation.

[0027] Furthermore, the four corners of the overhead circumferential rib plate 4 are cut into inwardly rounded welding holes 12, which is beneficial to improving the continuity of the welding operation. The edge of the overhead circumferential rib plate 4 is opened with double-sided grooves 18 to facilitate subsequent double-sided welding operations.

[0028] Furthermore, two rows of first through holes 19 are equidistantly opened in the middle of the embedded portion top plate 5, so as to facilitate the concrete to gradually submerge the pier from the bottom, and the redundant gas is discharged from the concrete pouring area through the exhaust hole. After the overall welding, two second through holes 20 are processed and the surrounding areas are scraped flat for the installation of the foundation screw.

[0029] Furthermore, the four corners of the embedded part circumferential rib plate 6 are cut into inwardly rounded welding holes 12, which is beneficial to improving the continuity of the welding operation. A large-scale third through hole 21 is processed in the middle to achieve the penetration of the embedded part radial cavity, and a single-sided groove 14 is opened on the edge.

[0030] Furthermore, the embedded radial rib 7 is processed with two large-scale fourth through holes 22 at positions avoiding the welding positions of the embedded circumferential rib 6, so as to achieve the penetration of the embedded circumferential cavity.

[0031] Furthermore, the inner embedded part bottom plate 8 is processed with two large-proportioned first rectangular holes 23 at the welding positions avoiding the embedded part radial rib plate 7 and the embedded part bottom rib 9, so as to penetrate the axial cavity of the embedded part, and the four corners of the first rectangular holes 23 are rounded to release stress.

[0032] Furthermore, the outer embedded part bottom plate 11 is processed with two large-scale second rectangular holes 24 at the welding positions avoiding the embedded part radial ribs 7 and the embedded part bottom ribs 9, so as to penetrate the axial cavity of the embedded part, and the four corners of the second rectangular holes 24 are rounded to release stress.

[0033] Specifically, the utility model enables the stator foundation pier to achieve a fully through structure, with a total of eight chambers interconnected at the front, middle and rear bottoms, and the frame structure embedded in the concrete is riveted in the concrete. Under the condition of ensuring the structural strength, the unsolidified concrete can quickly fill the entire bottom cavity of the stator foundation pier, and the redundant gas is squeezed with the concrete and exhausted along the top exhaust hole. It can effectively suppress the problems of backflow, cavity, incomplete contact, etc. of the on-site cast foundation concrete, improve multiple performance indicators such as foundation strength and stiffness, evenly release the unbalanced stress of the unit, and improve the stability of the unit operation.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them. Those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments or replace some or all of the technical features therein; however, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solution scope of the embodiments of the utility model.

Claims

1. A high-speed pumped storage generator motor through-type stator base foundation pier, characterized in that: The invention comprises a frame (1), a pier top plate (2), an overhead radial rib plate (3), an overhead circumferential rib plate (4), an embedded top plate (5), an embedded circumferential rib plate (6), an embedded radial rib plate (7), an inner embedded bottom plate (8), an embedded bottom rib (9), an embedded radial abutment plate (10), and an outer embedded bottom plate (11). The embedded top plate (5), the embedded circumferential rib plate (6), the embedded radial rib plate (7), the inner embedded bottom plate (8), the embedded bottom rib (9), the embedded radial abutment plate (10), and the outer embedded bottom plate (11) are welded to form a cage-shaped frame, which becomes a partial structure embedded in concrete and is then welded to the frame (1), the pier top plate (2), the overhead radial rib plate (3), and the overhead circumferential rib plate (4) to form a whole.

2. A high-speed pumped storage generator motor through-type stator base foundation support according to claim 1, characterized in that: The four corners of the frame (1) are cut into internally rounded welding holes (12), a rectangular cavity (13) is processed at equal distances from the edge of the frame (1), the four corners of the rectangular cavity (13) are rounded to release stress, and a single-side groove (14) is opened on the edge of the frame (1).

3. A high-speed pumped storage generator motor through-type stator base foundation support according to claim 1, characterized in that: A centripetal arc (15) of a certain size is machined on the outer circumference of the pier top plate (2), and the size of the arc depends on the outer circumference size of the lower ring of the stator base. Four threaded holes (16) distributed at equal intervals are machined in the middle of the pier top plate (2). The stator base and the stator base foundation pier are fixed together by bolts and nuts. After the stator base and the stator base foundation pier are fixed together to a specified tightening torque, they are radially drilled and twisted at the connection after being deviated to a certain distance, and the positioning pin (17) is overlap-welded on the stator foundation pier.

4. A high-speed pumped storage generator motor through-type stator base foundation buttress according to claim 1, characterized in that: The four corners of the overhead circumferential rib plate (4) are cut into inwardly rounded welding holes (12), and the edge of the overhead circumferential rib plate (4) is provided with double-sided grooves (18).

5. A high-speed pumped storage generator motor through-type stator base foundation buttress according to claim 1, characterized in that: The top plate (5) of the embedded part is provided with two rows of first through holes (19) at equal distances in the middle, and two second through holes (20) are processed after the whole is welded and the surrounding areas are scraped flat.

6. A high-speed pumped storage generator motor through-type stator base foundation buttress according to claim 1, characterized in that: The four corners of the embedded circumferential rib plate (6) are cut into inwardly rounded welding holes (12), a third through hole (21) is processed in the middle, and a single-side groove (14) is opened on the edge.

7. A high-speed pumped storage generator motor through-type stator base foundation buttress according to claim 1, characterized in that: The embedded radial rib plate (7) is processed with two fourth through holes (22) at positions avoiding welding of the embedded circumferential rib plate (6).

8. A high-speed pumped storage generator motor through-type stator base foundation support according to claim 1, characterized in that: The inner embedded portion bottom plate (8) is processed with two first rectangular holes (23) at positions avoiding welding of the embedded portion radial rib plate (7) and the embedded portion bottom rib (9), and the four corners of the first rectangular holes (23) are rounded to release stress.

9. A high-speed pumped storage generator motor through-type stator base foundation support according to claim 1, characterized in that: The outer embedded portion bottom plate (11) is processed with two second rectangular holes (24) at positions avoiding welding of the embedded portion radial rib plate (7) and the embedded portion bottom rib (9), and the four corners of the second rectangular holes (24) are rounded to release stress.

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