CN216198606U

CN216198606U - Totally-enclosed sound-absorbing noise-reducing device for waterwheel chamber of water pump turbine

Info

Publication number: CN216198606U
Application number: CN202122709877.6U
Authority: CN
Inventors: 尹国军; 刘冬; 凡家异; 宋敏; 刘德民; 邓金杰; 熊欣; 罗远红; 张彬; 黄世海; 周顺
Original assignee: Dongfang Electric Machinery Co Ltd DEC
Current assignee: Dongfang Electric Machinery Co Ltd DEC
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-04-05
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a water turbine chamber totally-enclosed sound absorption and noise reduction device, which relates to the technical field of water turbines, and comprises a floor escalator walking plate, a floor escalator covering plate, a floor escalator sound absorption mechanism and a machine pit wall sound absorption mechanism; the floor escalator running board, the floor escalator covering board, the floor escalator sound absorbing mechanism and the machine pit wall sound absorbing mechanism are all positioned in the water turbine chamber of the water pump turbine, the floor escalator running board and the floor escalator covering board are all positioned above the rotating wheel and are in annular hollow box structures, the outer end of the floor escalator running board is installed on the machine pit wall of the water turbine chamber, and the inner end of the floor escalator running board is connected with the floor escalator covering board; the sound absorbing mechanism of the floor escalator is arranged in a hollow box-shaped structure inside the floor escalator running board and the floor escalator covering board, the sound absorbing mechanism of the machine pit wall is arranged on the machine pit wall, and the bottom end of the sound absorbing mechanism of the machine pit wall is connected with the outer end of the sound absorbing mechanism of the floor escalator into a whole. The utility model effectively prevents the noise source of the unit from being transmitted to the external environment.

Description

Totally-enclosed sound-absorbing noise-reducing device for waterwheel chamber of water pump turbine

Technical Field

The utility model relates to the technical field of water pump turbines, in particular to a totally-enclosed sound-absorbing and noise-reducing device for a water turbine chamber of a water pump turbine.

Background

The pump turbine is a novel water pumping energy storage unit appearing in the 30 s of the 20 th century, and compared with an energy storage unit formed by connecting a water turbine and a water pump in series, the pump turbine is greatly lightened in weight and reduced in manufacturing cost, so that the pump turbine is widely applied. The pump turbine mainly comprises a mixed flow type, an inclined flow type and a through flow type, and the applicable range of a water head/lift is different. The mixed-flow type and inclined-flow type pump-turbine water turbine is mainly applied to large and medium pumped storage power stations, wherein the mixed-flow type pump-turbine water turbine is most widely used. The through-flow is most used in tidal power plants. In addition, in some pump stations equipped with an axial flow pump, the axial flow pump is also used for reverse rotation to generate electricity, and the application of the axial flow pump turbine is not wide.

In the pump turbine, the pumped storage unit is higher because its flood peak, and it is great to exert oneself, and operating mode conversion is more frequent, and the noise pollution of unit is comparatively serious, and a great deal of power station personnel all wear earplug work for a long time when the machine pit, bring a great deal of inconvenience for power station personnel.

In the debugging process of a 1# -4 # unit of a certain power station, the phenomenon that the unit has large noise under partial working conditions is found, noise tests are carried out on different positions of 4 units of the unit in order to obtain more detailed data, and the frequency characteristic of the noise is analyzed. Analysis shows that the noise mainly comes from the noise caused by the water flow impact in the flow channel.

In the prior art, the patent document of the utility model with the publication number of CN211397762U and the publication date of 2020, 09 and 01 discloses a noise reduction device for a hydraulic generator, which comprises a base, two supporting blocks, two supporting springs, a bottom plate and a protective cover, wherein the bottoms of the two supporting blocks are fixedly connected with the left side and the right side of the top of the base respectively, and the bottom ends of the two supporting springs are fixedly connected with the tops of the two supporting blocks respectively. This a noise device of making an uproar falls for hydraulic generator, through being provided with the protection casing, the inside at the protection casing is installed to the organism, when the device during operation, the noise that the device inside produced absorbs through the sound absorbing layer earlier, the inside on sound absorbing layer is provided with the vacuum cavity, can carry out the separation to the noise, then further separate the fender to the noise through the puigging, further blocked the inside outside transmission of noise of protection casing, make the device reach the effect of making an uproar falls when using, the noise that the device produced when the during operation has effectively been prevented from leading to the fact the influence to the living environment on every side.

The noise reduction device that above-mentioned patent provided realizes the noise reduction effect through the protection casing. However, it is not provided with a walking board, and it is inconvenient for a worker to check and maintain the equipment therein.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a totally-enclosed sound absorption and noise reduction device for a water turbine chamber of a water pump turbine.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a water pump turbine waterwheel chamber totally-enclosed sound absorption and noise reduction device comprises a floor escalator walking plate, a floor escalator covering plate, a floor escalator sound absorption mechanism and a machine pit wall sound absorption mechanism;

the floor escalator running board, the floor escalator covering board, the floor escalator sound absorbing mechanism and the machine pit wall sound absorbing mechanism are all located inside a water pump and turbine water-wheel locomotive room, the floor escalator running board and the floor escalator covering board are all located above the rotating wheel and are all in an annular hollow box-shaped structure, the outer end of the floor escalator running board is installed on the machine pit wall of the water-wheel locomotive room, the inner end of the floor escalator running board is connected with the floor escalator covering board, and a rotating wheel main shaft transversely penetrates through a center hole of the floor escalator covering board;

the sound absorbing mechanism of the floor escalator is arranged in a hollow box-shaped structure inside the floor escalator running board and the floor escalator covering board, the sound absorbing mechanism of the machine pit wall is arranged on the machine pit wall, and the bottom end of the sound absorbing mechanism of the machine pit wall is connected with the outer end of the sound absorbing mechanism of the floor escalator into a whole.

Further, inhale the sound and fall the device of making an uproar still include waterwheel room soundproof door, waterwheel room soundproof door is located floor staircase running board top, and waterwheel room soundproof door intussuseption is filled with sound absorption sound insulation layer.

Furthermore, a handrail is arranged between the floor escalator running board and the floor escalator covering board, and a skirting board is arranged at the bottom end of the handrail.

Furthermore, an inclined support rod is arranged between the lower part of the floor escalator running board and the pit wall, and a support frame for supporting the floor escalator covering board is arranged below the floor escalator covering board.

Furthermore, the floor escalator covering plate is of a block detachable structure and is provided with a first observation window.

Furthermore, sound absorbing cotton layers are filled in the sound absorbing mechanism of the floor escalator and the sound absorbing mechanism of the pit wall.

Further, be provided with the second observation window on the waterwheel room soundproof door, the second observation window is toughened fire-proof glass's double-deck hollow structure.

The utility model has the beneficial effects that:

1. the floor escalator running board and the floor escalator covering board which are in the annular hollow box-shaped structures are arranged, so that unit equipment below a floor is completely sealed, meanwhile, the floor escalator sound absorption mechanism is arranged in the floor escalator running board and the floor escalator covering board, and the pit wall sound absorption mechanism is arranged on the pit wall, so that the unit noise source is effectively prevented from being transmitted to the external environment.

2. The sound absorption mechanism of the floor escalator is arranged in the hollow box-shaped structures inside the travelling plate and the covering plate of the floor escalator, so that the sound absorption mechanism cannot be seen during travelling, and the hidden design does not influence the requirements of painting color and the like of a power station.

3. The equipment below the water pump turbine floor is completely sealed, and then the sound absorption mechanism of the pit wall on the lining wall of the pit and the arrangement of the sound insulation door of the waterwheel chamber are combined, so that the noise source is basically completely sealed, and the transmission and the diffusion of the noise to the external environment are effectively blocked.

Drawings

FIG. 1 is a schematic view of the present invention;

reference numerals:

1. a floor staircase walking board; 2. a floor staircase closure panel; 3. a sound absorbing mechanism of the floor staircase; 4. a sound absorbing mechanism of the pit wall; 5. a waterwheel room soundproof door; 6. a railing; 7. inclining the support rod; 8. a support frame.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Example 1

A totally-enclosed sound absorption and noise reduction device for a water pump turbine waterwheel chamber is shown in figure 1 and comprises a floor escalator running board 1, a floor escalator covering board 2, a floor escalator sound absorption mechanism 3 and a machine pit wall sound absorption mechanism 4.

Floor staircase running board 1, floor staircase apron 2, sound mechanism 3 is inhaled to floor staircase and sound mechanism 4 is all located the hydraulic turbine waterwheel indoor portion with the machine pit wall, floor staircase running board 1 and floor staircase apron 2 all are located the runner top and all are annular cavity box structure, the outer end of floor staircase running board 1 is installed on waterwheel indoor machine pit wall, the inner is connected with floor staircase apron 2, the centre bore of floor staircase apron 2 has traversed the runner main shaft.

The sound absorbing mechanism 3 of the floor escalator is arranged in a hollow box-shaped structure inside the walking plate 1 of the floor escalator and the covering plate 2 of the floor escalator, the sound absorbing mechanism 4 of the machine pit wall is arranged on the machine pit wall, and the bottom end of the sound absorbing mechanism 4 of the machine pit wall is connected with the outer end of the sound absorbing mechanism 3 of the floor escalator into a whole.

In the embodiment, the waterwheel chamber of the pump turbine is of a closed structure, and the floor escalator walking plate 1 is used for a worker to walk on the floor escalator walking plate to check the running condition of a unit or maintain the unit; the floor staircase covering plate 2 is used for covering a unit below; the sound absorption mechanism 3 of the floor staircase and the sound absorption mechanism 4 of the machine pit wall are used for absorbing sound and reducing noise.

The floor escalator running board 1 and the floor escalator covering board 2 which are in the annular hollow box-shaped structures are arranged in the machine tool, so that the machine tool below the floor is completely sealed, meanwhile, the floor escalator sound absorption mechanism 3 is arranged in the floor escalator running board 1 and the floor escalator covering board 2, the pit wall sound absorption mechanism 4 is arranged on the pit wall, and the propagation of a machine tool noise source to the external environment is effectively prevented.

Example 2

In this embodiment, a further improvement is made on the basis of embodiment 1, as shown in fig. 1, the sound-absorbing and noise-reducing device further includes a waterwheel room soundproof door 5, the waterwheel room soundproof door 5 is located above the floor escalator running board 1, and the inside of the waterwheel room soundproof door 5 is filled with a sound-absorbing and sound-insulating layer. And a second observation window is arranged on the waterwheel room soundproof door 5, and the second observation window is of a double-layer hollow structure made of tempered fireproof glass.

In the embodiment, the soundproof door 5 of the waterwheel room is composed of a door frame and a door leaf, is formed by cold processing of a high-quality cold-rolled steel plate with the thickness of 1.5mm, and is filled with a sound absorption material, a damping material and a sound insulation material according to the sound insulation grade. The soundproof door is provided with an accessible threshold, and the door frame is in a combined split mounting type and does not need to be embedded. Corrosion resistance, fire resistance and high sound insulation, meets the grounding requirement, and adopts an inner push-pull rod type door lock. The sound-proof door of the waterwheel room needs to be provided with an observation window, and the observation window is made of 6 mm-thick toughened fireproof glass and has a double-layer hollow structure and is explosion-proof.

Example 3

The embodiment is further improved on the basis of the embodiment 2, as shown in fig. 1, in order to ensure safe and convenient maintenance, a handrail 6 is arranged between the floor escalator running board 1 and the floor escalator covering board 2, a skirting board is arranged at the bottom end of the handrail 6, and the skirting board and the handrail 6 separate the floor escalator running board 1 from the floor escalator covering board 2 to prevent people from entering the floor escalator.

An inclined support rod 7 is arranged between the lower part of the floor escalator running board 1 and the pit wall, and a support frame 8 for supporting the floor escalator covering board 2 is arranged below the floor escalator covering board 2 so as to support the floor escalator running board 1 and the floor escalator covering board 2 and prevent the floor escalator running board 1 and the floor escalator covering board 2 from deforming.

The floor staircase covering plate 2 is of a block detachable structure, and is provided with a first observation window for facilitating the inspection of personnel. The cover plate is made of light materials, is of a blocking structure and an easy-to-detach structure, and is convenient for personnel to disassemble and assemble when the top cover is overhauled.

Inhale sound mechanism 3 and the machine pit wall and inhale that sound mechanism 4 is inside all to be filled with and inhale the cotton layer of sound, in order to guarantee to inhale the noise reduction effect and the environmental protection requirement of sound mechanism, sound absorbent adopts high-quality glass cotton. Wherein the noise reduction coefficient NRC is not less than 0.95. The volume weight of the sound absorption material is about 32kg/m3, the perforation rate of the perforated protective panel is more than or equal to 32%, and the thickness of the perforated protective panel is more than or equal to 1.2 mm.

For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:

when the escalator is in operation, the floor escalator running board 1 and the floor escalator covering board 2 completely seal the unit equipment below the floor, and the noise generated by the unit equipment is absorbed and reduced by the floor escalator running board 1 and the floor escalator sound absorption mechanism 3 in the floor escalator covering board 2; the noise above the floor is absorbed by the sound absorption mechanism 4 of the machine pit wall and is reduced, and is isolated by the sound insulation door 5 of the waterwheel room. Therefore, the sound absorption and noise reduction device can substantially completely enclose the noise source and effectively block the transmission and diffusion of the noise to the external environment.

In the research of sound reduction and noise reduction of a built power station, sound insulation measures are carried out on the inner wall surface of a waterwheel room, the channel side of the waterwheel room, the wall surface of a stair, the ceiling and a hanging hole cover plate of the waterwheel room, and the test shows that the noise reduction effect is that the outside sound pressure is reduced by at least 3 dB. And sound insulation doors are arranged at the inlet door of the waterwheel chamber, the inlet door of the tail water pipe chamber and the inlet of the volute inlet door, and the sound pressure outside the sound insulation doors is reduced by 5dB through the test noise reduction effect.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalents or substitutions are included in the scope of the present invention defined by the claims.

Claims

1. The utility model provides a totally closed sound of inhaling in pump turbine waterwheel room falls device of making an uproar which characterized in that: the floor escalator sound absorption device comprises a floor escalator walking plate (1), a floor escalator covering plate (2), a floor escalator sound absorption mechanism (3) and a machine pit wall sound absorption mechanism (4);

the floor escalator running board (1), the floor escalator covering board (2), the floor escalator sound absorbing mechanism (3) and the machine pit wall sound absorbing mechanism (4) are all located inside a water pump and water turbine water wagon room, the floor escalator running board (1) and the floor escalator covering board (2) are all located above a rotating wheel and are of annular hollow box-shaped structures, the outer end of the floor escalator running board (1) is installed on the machine pit wall of the water wagon room, the inner end of the floor escalator running board is connected with the floor escalator covering board (2), and a rotating wheel main shaft transversely penetrates through a center hole of the floor escalator covering board (2);

the sound absorbing mechanism (3) of the floor escalator is installed in a hollow box-shaped structure inside the floor escalator running board (1) and the floor escalator covering board (2), the sound absorbing mechanism (4) of the machine pit wall is installed on the machine pit wall, and the bottom end of the sound absorbing mechanism (4) of the machine pit wall is connected with the outer end of the sound absorbing mechanism (3) of the floor escalator into a whole.

2. The sound absorbing and noise reducing assembly of claim 1, wherein: inhale the sound and fall device of making an uproar still include waterwheel room soundproof door (5), waterwheel room soundproof door (5) are located floor staircase running board (1) top, and waterwheel room soundproof door (5) inside packing has sound absorption sound insulation layer.

3. The sound absorbing and noise reducing assembly of claim 1, wherein: a handrail (6) is arranged between the floor escalator running board (1) and the floor escalator covering board (2), and a skirting board is arranged at the bottom end of the handrail (6).

4. The sound absorbing and noise reducing assembly of claim 1, wherein: an inclined support rod (7) is arranged between the lower portion of the floor escalator running board (1) and the pit wall, and a support frame (8) for supporting the floor escalator covering board (2) is arranged below the floor escalator covering board (2).

5. The sound absorbing and noise reducing assembly of claim 1, wherein: the floor escalator covering plate (2) is of a block detachable structure, and a first observation window is arranged on the floor escalator covering plate.

6. The sound absorbing and noise reducing assembly of claim 1, wherein: the sound absorption mechanism (3) of the floor escalator and the sound absorption mechanism (4) of the pit wall are both filled with sound absorption cotton layers.

7. The sound absorbing and noise reducing assembly of claim 2, wherein: and a second observation window is arranged on the sound insulation door (5) of the waterwheel room, and the second observation window is of a double-layer hollow structure made of tempered fireproof glass.