CN217586211U

CN217586211U - Air leakage monitoring device for air cushion surge chamber of water turbine generator set

Info

Publication number: CN217586211U
Application number: CN202122957607.7U
Authority: CN
Inventors: 张群杰; 徐迟
Original assignee: Chengdu Aeronautic Polytechnic
Current assignee: Chengdu Aeronautic Polytechnic
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-10-14
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a hydraulic turbine generating set air cushion surge-chamber air leakage monitoring devices belongs to the surge-chamber field. The utility model discloses a surge-chamber body, fixed surface is connected with airtight top on the surge-chamber body, and there are fixedly connected with inlet tube and outlet pipe in surge-chamber body week side respectively, and the airtight cover of fixedly connected with in surge-chamber body week side is provided with the cavity between airtight cover and the airtight top, and the gas that the airtight top spilt gets into the cavity, and the gas pocket has been seted up to the airtight cover upper surface, and the accurate air flow meter of gas pocket upper end fixedly connected with, the accurate air flow meter upper surface fixed mounting has large-traffic air flow meter. The utility model discloses a set up airtight top and airtight cover, make this device have the gas leakage condition to take place the back can leak in airtight cover and the airtight cavity that pushes up between, gas gets into accurate air flow meter and large-traffic air flow meter through the air hose afterwards and detects, makes this device can monitor slight gas leakage and a large amount of gas leakage, and the monitoring precision is higher.

Description

Air leakage monitoring device for air cushion surge chamber of water turbine generator set

Technical Field

The utility model belongs to surge-chamber field especially relates to a hydraulic turbine generating set air cushion surge-chamber air leakage monitoring devices.

Background

In order to improve the water hammer, a pressure regulating chamber is often arranged between the water guide and the unit to reduce the influence of water hammer pressure, and the pressure regulating chamber is generally divided into a cylindrical pressure regulating chamber, an impedance pressure regulating chamber, a dual-chamber pressure regulating chamber, an overflow pressure regulating chamber, a differential pressure regulating chamber and an air cushion type or semi-air cushion type pressure regulating chamber, wherein the air cushion type pressure regulating chamber is an economic and practical choice with excellent performance.

Because the air cushion type pressure regulating chamber needs to be filled with high-pressure gas, the air leakage amount of the pressure regulating chamber needs to be monitored frequently in daily use, and the problem that the existing air cushion pressure regulating chamber is difficult to detect air leakage due to insufficient air pressure, so that the use is inconvenient is avoided.

SUMMERY OF THE UTILITY MODEL

Not enough to the above-mentioned among the prior art, the utility model aims to provide a hydraulic turbine generating set air cushion surge-chamber gas leakage amount monitoring devices, it has solved the difficult problem that detects the gas leakage condition in prior art air cushion surge-chamber.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a hydraulic turbine generating set air cushion surge-chamber air leakage volume monitoring devices, including the surge-chamber body, fixed surface is connected with airtight top on the surge-chamber body, constitute the surge-chamber through surge-chamber body and airtight top and slow down the water hammer effect, surge-chamber body week side fixedly connected with inlet tube and outlet pipe respectively, inject water and drainage into the surge-chamber, surge-chamber body week side fixedly connected with airtight cover, whether leak gas through airtight cover increase airtight top's leakproofness and convenient monitoring airtight top, be provided with the cavity between airtight cover and the airtight top, the gaseous entering cavity that the airtight top spilt, the gas pocket is seted up to the airtight cover upper surface, gas pocket upper end fixedly connected with accurate air flow meter, monitor a small amount of gas leakage, accurate air flow meter upper surface fixed mounting has large-traffic gas flow meter, monitor a large amount of gas leakage, large-traffic air flow meter upper surface fixed mounting has the air valve, whether control this device exhausts.

Preferably, the inner circular surface of the water inlet pipe is fixedly provided with a water inlet valve, and the inner circular surface of the water outlet pipe is fixedly provided with a water outlet valve, so that the water level in the pressure regulating chamber body can be conveniently controlled.

Preferably, the pressure regulating chamber body is internally provided with a water layer, the airtight roof is internally provided with a high-pressure air layer, and the air in the pressure regulating chamber is compressed or expanded to reduce the fluctuation amplitude of the water level.

Preferably, an air pipe is fixedly connected to the upper surface of the air hole.

Preferably, the precision air flow meter, the large-flow air flow meter and the air valve are fixedly arranged on the peripheral side face of the air pipe, so that air circulation can be monitored conveniently.

Preferably, the joint of the airtight cover and the pressure adjusting chamber body is lower than the water level of the water layer, so that the leakage of the high-pressure air layer is prevented.

Preferably, a plurality of air pressure meters are fixedly arranged on the inner surface of the airtight cover, and the air pressure in the cavity is monitored.

The utility model discloses following beneficial effect has:

1. the utility model discloses a set up behind airtight top and the airtight cover, if there is gas leakage to take place when using, can leak in the cavity between airtight cover and airtight top, later gas gets into accurate air flow meter and large-traffic air flow meter through the air hose and detects, makes this device can monitor slight gas leakage and a large amount of gas leakage, and the monitoring precision is higher.

2. Through setting up the junction with gas tight roof and surge-chamber body in the water level below, this device can not leak in the external world even gas leakage yet, can effectively detect the gas leakage condition to collect the gas that spills when gas leakage, prevent other devices of gas impact.

Of course, it is not necessary for any product to achieve all of the above advantages simultaneously in practicing the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the air leakage monitoring device for the air cushion surge chamber of the water turbine generator set of the present invention;

fig. 2 is a structural diagram of an air flow meter of the air cushion surge chamber air leakage monitoring device of the water turbine generator set of the present invention;

fig. 3 is a top view of the leakage monitoring device for the air cushion surge chamber of the water turbine generator set of the present invention;

fig. 4 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3 in accordance with the present invention;

fig. 5 is a side view of the utility model discloses a hydraulic turbine generating set air cushion surge-chamber air leakage monitoring devices.

In the drawings, the reference numbers indicate the following list of parts: 1. a pressure regulating chamber body; 2. a water inlet pipe; 3. A water outlet pipe; 4. an airtight top; 5. a water layer; 6. a high pressure air layer; 7. an airtight cover; 8. a cavity; 9. An air tube; 10. a precision air flow meter; 11. a high flow air flow meter; 12. an air valve; 13. air holes; 14. a water inlet valve; 15. and (4) a water outlet valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc. indicate an orientation or positional relationship only for the convenience of description of the present invention and to simplify the description, and do not indicate or imply that the component or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Please refer to fig. 1-5, the utility model relates to a hydraulic turbine generating set air cushion surge-chamber air leakage monitoring devices, including surge-chamber body 1, fixed surface is connected with airtight top 4 on surge-chamber body 1, constitute surge-chamber through surge-chamber body 1 and airtight top 4 and slow down the water hammer effect, 1 week side of surge-chamber body is fixedly connected with inlet tube 2 and outlet pipe 3 respectively, inject water and drainage into the surge-chamber, 1 week side fixedly connected with airtight cover 7 of surge-chamber body, increase the leakproofness of airtight top 4 and conveniently monitor whether airtight top 4 leaks gas through airtight cover 7, be provided with cavity 8 between airtight cover 7 and the airtight top 4, the gas that airtight top 4 spilt gets into cavity 8, airtight cover 7 upper surface is seted up there is gas pocket 13, gas pocket 13 upper end fixedly connected with accurate air flowmeter 10, monitor a small amount of gas leakage, accurate air flowmeter 10 upper surface fixed mounting has large-flow air flowmeter 11, monitor a large amount of gas leakage, air flowmeter 11 upper surface fixed mounting has air valve 12, whether this device of control exhausts.

Furthermore, the inner circular surface of the water inlet pipe 2 is fixedly provided with a water inlet valve 14, and the inner circular surface of the water outlet pipe 3 is fixedly provided with a water outlet valve 15, so that the water level inside the pressure regulating chamber body 1 can be conveniently controlled.

Furthermore, the water layer 5 is arranged in the pressure regulating chamber body 1, the high-pressure air layer 6 is arranged in the airtight roof 4, and the amplitude of water level fluctuation is reduced by utilizing the compression or expansion of air in the pressure regulating chamber.

Further, an air tube 9 is fixedly connected to the upper surface of the air hole 13.

Further, the precise air flow meter 10, the large-flow air flow meter 11 and the air valve 12 are fixedly installed on the peripheral side face of the air pipe 9, air circulation is convenient to monitor, the model of the selected precise air flow meter 10 is FS4001, the model of the selected large-flow air flow meter 11 is LUGB-100, and the model of the air valve 12 is Y2773A5072.

Further, the joint of the airtight cover 7 and the surge tank body 1 is lower than the water level of the water layer 5, preventing the leakage of the high-pressure air layer 6.

Further, a plurality of air pressure gauges are fixedly arranged on the inner surface of the airtight cover 7, and the air pressure in the cavity 8 is monitored.

One specific application of this embodiment is: when the air-tight cover 7 is installed on the peripheral side surface of the pressure regulating chamber body 1 during installation, the air-tight cover 7 covers the air-tight top 4 and is sealed, the air pipe 9, the precise air flow meter 10, the large-flow air flow meter 11 and the air valve 12 are installed through the air hole 13, the water inlet pipe 2 and the water outlet pipe 3 are communicated during use, water is injected into the pressure regulating chamber body 1 until the water level exceeds the joint of the air-tight cover 7 and the pressure regulating chamber body 1, when water flow impacts the pressure regulating chamber to cause air leakage, gas can enter the cavity 8 between the air-tight cover 7 and the air-tight top 4 and then flows out through the air pipe 9, at the moment, the precise air flow meter 10 and the large-flow air flow meter 11 judge the air leakage condition according to detection data, or the precise air flow meter 10 and the large-flow air flow meter 11 transmit the detection data to an upper computer through a cable, and the upper computer judges the air leakage condition.

The precision air flow meter 10 and the large flow air flow meter 11 are flow meters with controllers.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best understand the invention and its practical application. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a hydraulic turbine generating set air cushion surge-chamber air leakage volume monitoring devices, includes surge-chamber body (1), its characterized in that:

fixed surface is connected with airtight top (4) on surge-chamber body (1), surge-chamber body (1) week side fixedly connected with inlet tube (2) and outlet pipe (3) respectively, surge-chamber body (1) week side fixedly connected with airtight cover (7), be provided with cavity (8) between airtight cover (7) and airtight top (4), airtight cover (7) upper surface is seted up there is gas pocket (13), gas pocket (13) upper end fixedly connected with accurate air flow meter (10), accurate air flow meter (10) upper surface fixed mounting has large-traffic air flow meter (11), large-traffic air flow meter (11) upper surface fixed mounting has air valve (12).

2. The air leakage monitoring device for the air cushion surge chamber of the hydro-turbine generator set according to claim 1, wherein a water inlet valve (14) is fixedly arranged on the inner circular surface of the water inlet pipe (2), and a water outlet valve (15) is fixedly arranged on the inner circular surface of the water outlet pipe (3).

3. The air leakage monitoring device for the air cushion surge chamber of the water turbine generator set according to claim 2, wherein a water layer (5) is arranged in the surge chamber body (1), and a high-pressure air layer (6) is arranged in the airtight top (4).

4. The device for monitoring the air leakage of the air cushion surge chamber of the hydro-turbine generator set according to claim 3, wherein an air pipe (9) is fixedly connected to the upper surface of the air hole (13).

5. The air leakage monitoring device for the air cushion surge chamber of the hydro-turbine generator set according to claim 4, wherein the precision air flow meter (10), the large flow air flow meter (11) and the air valve (12) are fixedly arranged on the peripheral side surface of the air pipe (9).

6. The device for monitoring the air leakage quantity of the air cushion pressure regulating chamber of the hydraulic turbine generator set according to claim 5, wherein the joint of the airtight cover (7) and the pressure regulating chamber body (1) is lower than the water level of the water layer (5).

7. The device for monitoring the air leakage of the air cushion surge chamber of the hydro turbine generator set according to claim 6, wherein a plurality of air pressure gauges are fixedly arranged on the inner surface of the airtight cover (7).