CN218522746U

CN218522746U - Hydroelectric set top cap water intake device

Info

Publication number: CN218522746U
Application number: CN202222034550.8U
Authority: CN
Inventors: 杨怀荣; 赵晓嘉; 刘啟文; 皮跃银; 吴封奎; 曾阳麟; 宋驳昊
Original assignee: Huaneng Lancang River Hydropower Co Ltd
Current assignee: Huaneng Lancang River Hydropower Co Ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-02-24
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses a water intake device for a top cover of a hydroelectric generating set, which comprises a triple eccentric butterfly valve arranged at a top cover water intake part, a top cover drainage pressure relief part and a top cover drainage part; the eccentric butterfly valve comprises a valve body, a valve rod is arranged on the inner wall of the valve body, and a three-eccentric butterfly plate is movably connected to the inner wall of the valve body; the valve stem is disposed behind the sealing face plane to provide an uninterrupted sealing path; the valve rod is arranged at one side of the central line of the pipeline/valve, and the sealing element is allowed to translate with the sealing seat when the sealing element is opened at 90 degrees; the seal seat and seal cone centerlines are inclined with respect to the pipe/valve centerline. The utility model discloses a rationally set up electric butterfly valve, the friction that produces in the valve motion has thoroughly been eliminated through electric butterfly valve's three off-centre.

Description

Hydroelectric set top cap water intake device

Technical Field

The utility model relates to a hydraulic turbine technical field especially relates to a hydroelectric set top cap water intake device.

Background

The water supply of the hydropower station comprises technical water supply, fire water supply and domestic water supply. The technical water supply is also called production water supply, mainly used for cooling operation equipment (such as a thrust bearing, a guide bearing, an air cooler, a water turbine guide bearing and a main transformer of a generator), secondly used for providing a clean water source with certain pressure for the working seal of a water turbine, also used for lubricating (such as a deep well pump rubber bush guide bearing) and hydraulic pressure operation (such as a jet pump, a main valve of a high-head power station and the like), and is an indispensable component for ensuring the safe and economic operation of a hydropower station.

Chinese patent No. CN106968876B discloses a water supply control method for hydroelectric generating set technology, the water supply of hydroelectric generating set technology is provided with a top cover water taking electric three-way valve, when the set adopts a water pump to supply water, the electric three-way valve is located at a "water discharging" position, and the top cover pressure releasing water discharging electric valve is located at a "full opening" position. When the top cover is used for taking water, the electric three-way valve is located at the water supply position, the top cover pressure relief and drainage electric valve is located at the full-off position, and the water supply and taking mode of the unit technology is switched through the positions of the electric three-way valve and the top cover pressure relief and drainage electric valve.

However, the electric ball valve has long operation time, the operating mechanism is seriously rusted, and the situations of jamming and improper switching frequently occur, so that the switching failure of the technical water supply mode of the unit cannot be normally carried out.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a hydroelectric set top cap water intaking device has solved that the time of putting into operation of electric ball valve is longer, and operating device corrosion is serious, and the circumstances that often appears the bite, the switch is not in place leads to the technical problem that the failure can not normally go on in unit technical water supply mode switching.

In order to achieve the above object, the utility model provides a following technical scheme:

a water intaking device for a top cover of a hydroelectric generating set comprises a triple eccentric butterfly valve arranged at a water intaking part of the top cover, a water discharging and pressure releasing part of the top cover and a water discharging part of the top cover;

the eccentric butterfly valve comprises a valve body, a valve rod is arranged on the inner wall of the valve body, and a triple eccentric butterfly plate is movably connected to the inner wall of the valve body;

the valve stem is disposed behind the sealing face plane to provide an uninterrupted sealing path;

the valve rod is arranged at one side of the central line of the pipeline/valve, and the sealing element is allowed to translate with the sealing seat when the sealing element is opened at 90 degrees; the seal centerline is inclined relative to the conduit/valve centerline.

Preferably, the outer wall of the three-eccentric butterfly plate is fixedly connected with a connecting block, the inner wall of the connecting block is rotatably connected with the outer wall of the valve rod, the outer wall of the top of the valve body is provided with a packing sealing device, and one side, far away from the valve body, of the packing sealing device is fixedly connected with a control device.

Preferably, the inner wall of the valve body is provided with a fixed valve seat and a movable valve seat, and the fixed valve seat and the movable valve seat are arranged on the outer side of the triple eccentric butterfly plate.

Preferably, an adjusting handle is rotatably connected to the outer wall of the control device.

Preferably, the inner wall of the valve body is fixedly connected with a filter screen.

Preferably, the device also comprises a water turbine top cover, a top cover water taking module, a top cover drainage pressure relief module, a top cover drainage module, a bearing, a cooling module and a tail water pipe;

a first three-eccentric butterfly valve is arranged in the top cover water taking module, a second three-eccentric butterfly valve is arranged in the top cover drainage pressure relief module, a third three-eccentric butterfly valve is arranged in the top cover drainage module, and the third three-eccentric butterfly valve is connected with the tail water pipe.

Preferably, the cooling module is connected with the bearing, and the cooling module supplies cooling for the bearing.

Preferably, the top cover water taking module is connected with the bearing, and the top cover water taking module supplies water for the bearing to cool.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up three eccentric electric butterfly valve in reasonable position, through opening, closing the switching that realizes unit technical water supply mode of control electric butterfly valve, the friction that produces in the valve motion has thoroughly been eliminated through electric butterfly valve's three off-centre.

2. The utility model discloses cross three eccentric electric butterfly valve's setting, to hydroelectric set's water supply reasonable control, it is longer to have solved the time of putting into operation of electrical ball valve, and the operating device corrosion is serious, and the circumstances that often appears the bite, the switch is not in place leads to the problem that the failure can not normally go on is switched to unit technical water supply mode.

Drawings

Fig. 1 is a schematic position diagram of a triple offset butterfly valve arrangement according to the present invention;

FIG. 2 is a schematic structural view of a triple offset butterfly valve of the present invention;

FIG. 3 is a schematic diagram of the explosion structure of the triple eccentric butterfly valve of the present invention;

FIG. 4 is a schematic view of a triple eccentric structure of the present invention;

in the figure: 1. a hydraulic turbine top cover; 2. a top cover water taking module; 3. a top cover drainage pressure relief module; 4. a top cover drainage module; 5. a bearing; 6. a cooling module; 7. a first third eccentric butterfly valve; 701. a valve body; 702. a valve stem; 703. a triple eccentric butterfly plate; 704. connecting blocks; 705. a fixed valve seat; 706. a movable valve seat; 707. a packing seal device; 708. a control device; 709. adjusting the handle; 8. a second third eccentric butterfly valve; 9. a third eccentric butterfly valve; 10. a draft tube.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments without making any creative efforts shall fall within the protection scope of the present application.

Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art. The use of "first," "second," and similar words in this embodiment does not denote any order, quantity, or importance, but rather the terms "first," "second," and the like are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may include, for example, fixed and removable connections or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "upper," "lower," "left," "right," "transverse," and "vertical" are used merely for purposes of orientation relative to the elements in the drawings, and these directional terms are relative terms, which are used for descriptive and clarifying purposes and which can vary accordingly depending upon the orientation in which the elements in the drawings are placed.

As shown in fig. 1, the water intake device for the top cover of the hydroelectric generating set according to the embodiment includes a top cover 1 of the hydroelectric generating set, a top cover water intake module 2, a top cover water drainage pressure relief module 3, a top cover water drainage module 4, a bearing 5, a cooling module 6, and a draft tube 10.

Cooling module 6 is connected with bearing 5, cooling module 6 is the bearing 5 cooling, top cap water intaking module 2 is connected with bearing 5, top cap water intaking module 2 is the bearing 5 cooling that supplies water, is provided with first three eccentric butterfly valve 7 in the top cap water intaking module 2, is provided with the three eccentric butterfly valve 8 of second in the top cap drainage pressure release module 3, is provided with the three eccentric butterfly valve 9 of third in the top cap drainage module 4, and the three eccentric butterfly valve 9 of third is connected with draft tube 10.

In this embodiment, carry out the water intaking through top cap water intaking module 2, after the water intaking, each bearing 5 cooling usefulness is supplied with to rivers, then drains away through top cap drainage module 4 again, changes former electric three-way valve into two electric butterfly valves, with the cancellation of current unit top cap water intaking electric three-way ball valve, changes into two three eccentric electric butterfly valves, eliminates the friction loss that produces in the valve motion.

In this embodiment, the top cover water getting mode is switched to fail and the logic is judged successfully:

1) When switching, any one of the three butterfly valves of top cover water taking, top cover water discharging and top cover pressure relief water discharging is opened or closed overtime (50S), the switching is overtime, the flow switching fails, and the three butterfly valves are opened to stop the order.

2) When switching, any one of the three butterfly valves of top cover water taking, top cover water discharging and top cover pressure relief water discharging reports 'failure' or 'over moment' to give an alarm, the flow switching fails, and the three butterfly valves are opened to 'stop order'.

3) When the valve positions of the top cover water taking mode are matched, the flow switching is successful. The control device is an existing device, and the control program can be set as needed, and can be realized by a programming method known by a person skilled in the art.

As shown in fig. 2 and 3, in this embodiment, the first triple eccentric butterfly valve 7 includes a valve body 701, a valve rod 702 is disposed on an inner wall of the valve body 701, a triple eccentric butterfly plate 703 is movably connected to the inner wall of the valve body 701, a connecting block 704 is fixedly connected to an outer wall of the triple eccentric butterfly plate 703, a fixed valve seat 705 and a movable valve seat 706 are disposed on the inner wall of the valve body 701, the fixed valve seat 705 and the movable valve seat 706 are disposed outside the triple eccentric butterfly plate 703, an inner wall of the connecting block 704 is rotatably connected to an outer wall of the valve rod 702, a packing sealing device 707 is disposed on an outer wall of the top of the valve body 701, a control device 708 is fixedly connected to a side of the packing sealing device 707 away from the valve body 701, an adjusting handle 709 is rotatably connected to an outer wall of the control device 708, a filter screen is fixedly connected to the inner wall of the valve body 701, and impurities in the water flow are filtered by the filter screen.

In this embodiment, the valve stem is disposed behind the plane of the sealing surface to provide an uninterrupted sealing path; the valve stem is disposed on one side of the conduit/valve centerline allowing the seal to translate with the seal seat when opened at 90 degrees. The seal centerline is tilted with respect to the conduit/valve centerline as shown in fig. 4. These three eccentricities completely eliminate the friction generated in the valve movement.

The working principle of the embodiment is as follows:

water is taken through the top cover water taking module 2, after water is taken, water flow is supplied for cooling each bearing 5, then the water is discharged through the top cover water discharging module 4, the original electric three-way valve is replaced by two electric butterfly valves, and the existing electric three-way ball valve for water taking on the top cover of the unit is cancelled and is changed into two three-eccentric electric butterfly valves; the existing electric ball valve for relieving pressure of the top cover of the machine set is eliminated and changed into a three-eccentric electric butterfly valve.

The valve stem is disposed behind the sealing face plane to provide an uninterrupted sealing path; the valve stem is disposed on one side of the conduit/valve centerline allowing the seal to translate with the seal seat when opened at 90 degrees.

The seal seat and seal cone centerlines are inclined relative to the conduit/valve centerline. These three eccentricities completely eliminate the friction generated in the valve motion.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a hydroelectric set top cap water intaking device which characterized in that: the three-eccentric butterfly valve comprises a top cover water taking part, a top cover drainage pressure relief part and a top cover drainage part;

the eccentric butterfly valve comprises a valve body (701), a valve rod (702) is arranged on the inner wall of the valve body (701), and a three-eccentric butterfly plate (703) is movably connected to the inner wall of the valve body (701);

the valve rod is arranged at one side of the central line of the pipeline/valve, and the sealing element is allowed to translate with the sealing seat when the sealing element is opened at 90 degrees;

the seal centerline is inclined relative to the conduit/valve centerline.

2. The apparatus of claim 1, wherein: the outer wall of the three-eccentric butterfly plate (703) is fixedly connected with a connecting block (704), the inner wall of the connecting block (704) is rotatably connected with the outer wall of the valve rod (702), the outer wall of the top of the valve body (701) is provided with a packing sealing device (707), and one side, away from the valve body (701), of the packing sealing device (707) is fixedly connected with a control device (708).

3. The apparatus of claim 2, wherein: the inner wall of the valve body (701) is provided with a fixed valve seat (705) and a movable valve seat (706), and the fixed valve seat (705) and the movable valve seat (706) are arranged on the outer side of the three-eccentric butterfly plate (703).

4. The apparatus of claim 2, wherein: the outer wall of the control device (708) is rotatably connected with an adjusting handle (709).

5. The apparatus of claim 1 or 2, wherein: the inner wall of the valve body (701) is fixedly connected with a filter screen.

6. The apparatus of claim 1, wherein: the device also comprises a water turbine top cover (1), a top cover water taking module (2), a top cover water drainage and pressure relief module (3), a top cover water drainage module (4), a bearing (5), a cooling module (6) and a draft tube (10);

be provided with first three eccentric butterfly valve (7) in top cap water intaking module (2), be provided with second three eccentric butterfly valve (8) in top cap drainage pressure release module (3), be provided with third three eccentric butterfly valve (9) in top cap drainage module (4), third three eccentric butterfly valve (9) are connected with draft tube (10).

7. The apparatus of claim 6, wherein: the cooling module (6) is connected with the bearing (5), and the cooling module (6) supplies cold for the bearing (5).

8. The apparatus of claim 6, wherein: top cap water intaking module (2) are connected with bearing (5), top cap water intaking module (2) are bearing (5) water supply cooling.