CN210265908U

CN210265908U - Medium-pressure fire butterfly valve for large thermal power generating unit

Info

Publication number: CN210265908U
Application number: CN201920931031.7U
Authority: CN
Inventors: 孙芳; 于玉霜
Original assignee: Nanjing Yupu Automation Equipment Co Ltd
Current assignee: Nanjing Yupu Automation Equipment Co Ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-04-07
Anticipated expiration: 2029-06-19

Abstract

The utility model relates to a thermal power technical field just discloses a large-scale middling pressure fire butterfly valve for thermal power unit, including the valve body, the equal fixed mounting in both sides of valve body has flange, the fixed sleeve pipe that has cup jointed in the middle part on valve body top, the sheathed tube top is connected and is fixed with the connecting plate, the top of connecting plate is rotated and is connected with the valve rod. The utility model discloses an outer edge at the valve plate sets up the sealing washer, be favorable to improving the tightness of being connected of valve plate and valve body inner chamber, thereby improve the whole compressive property of this butterfly valve, utilize the characteristic of sealing washer perfluoroelastomer material, can increase its heat resistance effectively, oxidation resistance and corrosion resistance, the life of sealing washer has been improved, the rethread sets up the guard plate in the both sides of valve plate, utilize the characteristic of guard plate polytetrafluoroethylene material, be favorable to improving the high temperature resistance of valve plate, corrosion resistance and leakproofness, thereby the high heat resistance and the corrosion resistance of this butterfly valve have been improved.

Description

Medium-pressure fire butterfly valve for large thermal power generating unit

Technical Field

The utility model relates to a thermal power generation technical field specifically is a large-scale middling pressure fire butterfly valve for thermal power unit.

Background

The thermal generator set is a set which uses coal, oil or combustible gas as fuel, heats water in a boiler to raise the temperature, and then uses steam with certain pressure to drive a gas turbine to generate electricity, and generally comprises a water vapor system, a combustion system and a power generation system.

The steam system is composed of a boiler, a steam turbine, a condenser, a high-low pressure heater, a condensate pump, a water feeding pump and the like, a butterfly valve is also needed to be used for controlling water flow in the steam system, and the butterfly valve is also called as a flap valve and is a regulating valve with a simple structure and used for on-off control of low pipeline media.

The medium-pressure butterfly valve is a common butterfly valve, is widely used, is usually corroded by high pressure, high temperature and water flow, and has a short service life in the thermal power generation process, so that the medium-pressure butterfly valve is required to have high pressure resistance, high heat resistance and corrosion resistance, and therefore the medium-pressure thermal butterfly valve for the large thermal power generating unit is provided.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem that prior art exists, an aspect of the utility model aims at providing a large-scale medium pressure fire power butterfly valve for thermal power generating unit.

In order to realize the above-mentioned purpose, the utility model provides a pair of large-scale for thermal power unit middling pressure fire butterfly valve, including the valve body, the equal fixed mounting in both sides of valve body has flange, the fixed sleeve pipe that has cup jointed in the middle part on valve body top, the sheathed tube top is connected and is fixed with the connecting plate, the top of connecting plate is rotated and is connected with the valve rod, the top of valve rod is connected and is fixed with the handle, the bottom of valve rod is passed the sleeve pipe and is extended to the inside of valve body, the valve rod is located the fixed cover of the inside one end of valve body and has been cup jointed the valve plate, the outer edge of valve plate is fixed to be inlayed and is had the sealing washer, the guard plate that is fixed with the looks adaptation is.

Preferably, the valve body is hollow cylindrical, the valve plate is discoid and the external diameter is less than the internal diameter of valve body, the draw-in groove that is used for inlaying the sealing washer is seted up on the outer edge of valve plate.

Preferably, the sealing ring is a perfluororubber product, and the sealing ring is embedded on the outer edge of the valve plate and is fixedly connected with the clamping groove.

Preferably, the protection plate is a polytetrafluoroethylene composite plate.

Preferably, the protective layer is an epoxy coal tar pitch coating layer.

Preferably, a bearing is arranged inside the sleeve, and an inner ring of the bearing is rotatably connected with the valve rod.

Compared with the prior art, the utility model provides a large-scale medium pressure butterfly valve for thermal power generating unit has following beneficial effect:

the utility model discloses an outer edge at the valve plate sets up the sealing washer, be favorable to improving the tightness of being connected of valve plate and valve body inner chamber, thereby improve the whole compressive property of this butterfly valve, utilize the characteristic of sealing washer perfluoroelastomer material, can increase its heat resistance effectively, oxidation resistance and corrosion resistance, the life of sealing washer has been improved, the rethread sets up the guard plate in the both sides of valve plate, utilize the characteristic of guard plate polytetrafluoroethylene material, be favorable to improving the high temperature resistance of valve plate, corrosion resistance and leakproofness, thereby the high heat resistance and the corrosion resistance of this butterfly valve have been improved.

Drawings

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

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic view of the valve plate of the present invention.

In the figure: 1. a valve body; 2. a connecting flange; 3. a sleeve; 4. a connecting plate; 5. a valve stem; 6. a handle; 7. a valve plate; 8. a seal ring; 9. a protection plate; 10. and (4) a protective layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

Referring to fig. 1-3, a middle pressure fire butterfly valve for a large thermal power generating unit comprises a valve body 1, wherein connecting flanges 2 are fixedly mounted on two sides of the valve body 1, a sleeve 3 is fixedly sleeved in the middle of the top end of the valve body 1, a connecting plate 4 is fixedly connected to the top end of the sleeve 3, a valve rod 5 is rotatably connected to the top of the connecting plate 4, a handle 6 is fixedly connected to the top end of the valve rod 5, the bottom end of the valve rod 5 penetrates through the sleeve 3 and extends into the valve body 1, a bearing is arranged inside the sleeve 3, an inner ring of the bearing is rotatably connected with the valve rod 5, a valve plate 7 is fixedly sleeved at one end of the valve rod 5 located inside the valve body 1, a sealing ring 8 is fixedly embedded on the outer edge of the valve plate 7, protection plates 9 matched with each other are fixedly connected to two sides of the valve plate 7.

Valve body 1 is hollow cylinder shape, valve plate 7 is discoid and the external diameter is less than the internal diameter of valve body 1, the draw-in groove that is used for inlaying sealing washer 8 is offered along the outer of valve plate 7, sealing washer 8 is the perfluoroelastomer goods, sealing washer 8 is inlayed and is connected fixedly at the outer edge of valve plate 7 and with the draw-in groove, through setting up sealing washer 8 along the outer at valve plate 7, be favorable to improving the tightness of being connected of

valve plate

7 and 1 inner chamber of valve body, thereby improve the whole compressive property of this butterfly valve, perfluororubber is synthetic polymer elastomer, utilize the characteristic of 8 perfluororubber materials of sealing washer, can increase its heat resistance effectively, oxidation resistance and corrosion resistance, the life of sealing washer 8 has.

The protection plate 9 is a polytetrafluoroethylene composite plate, the protection plates 9 are arranged on two sides of the valve plate 7, and the characteristics of polytetrafluoroethylene materials of the protection plates 9 are utilized, so that the high heat resistance, the corrosion resistance and the sealing performance of the valve plate 7 are improved, and the high heat resistance and the corrosion resistance of the butterfly valve are improved (polytetrafluoroethylene is a high molecular compound formed by polymerizing tetrafluoroethylene and has excellent chemical stability, corrosion resistance, sealing performance and good ageing resistance).

The protective layer 10 is an epoxy coal tar pitch coating layer, a paint film of the epoxy coal tar pitch coating has excellent adhesive force, impact resistance, water resistance and wear resistance, and high-pressure airless spraying is adopted, so that the pressure resistance of the inner cavity of the valve body 1 is favorably improved.

Those not described in detail in this specification are within the skill of the art.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. The utility model provides a large-scale medium pressure fire butterfly valve for thermal power unit which characterized in that: comprises a valve body (1), connecting flanges (2) are fixedly arranged on both sides of the valve body (1), a sleeve (3) is fixedly sleeved in the middle of the top end of the valve body (1), a connecting plate (4) is fixedly connected to the top end of the sleeve (3), the top of the connecting plate (4) is rotatably connected with a valve rod (5), the top end of the valve rod (5) is fixedly connected with a handle (6), the bottom end of the valve rod (5) passes through the sleeve (3) and extends to the interior of the valve body (1), a valve plate (7) is fixedly sleeved at one end of the valve rod (5) positioned in the valve body (1), a sealing ring (8) is fixedly embedded on the outer edge of the valve plate (7), two sides of the valve plate (7) are respectively connected and fixed with a corresponding protection plate (9), the inner wall of the valve body (1) is provided with a protective layer (10), and the outer edge of the sealing ring (8) is tightly connected with the protective layer (10).

2. The medium-pressure fire butterfly valve for the large thermal power generating unit according to claim 1, characterized in that: the valve body (1) is hollow cylindrical, the valve plate (7) is disc-shaped, the outer diameter of the valve plate is smaller than the inner diameter of the valve body (1), and a clamping groove used for embedding the sealing ring (8) is formed in the outer edge of the valve plate (7).

3. The medium-pressure fire butterfly valve for the large thermal power generating unit according to claim 1, characterized in that: the sealing ring (8) is a perfluorinated rubber product, and the sealing ring (8) is embedded on the outer edge of the valve plate (7) and is fixedly connected with the clamping groove.

4. The medium-pressure fire butterfly valve for the large thermal power generating unit according to claim 1, characterized in that: the protection plate (9) is a polytetrafluoroethylene composite plate.

5. The medium-pressure fire butterfly valve for the large thermal power generating unit according to claim 1, characterized in that: the protective layer (10) is an epoxy coal tar pitch coating layer.

6. The medium-pressure fire butterfly valve for the large thermal power generating unit according to claim 1, characterized in that: the bearing is arranged in the sleeve (3), and the inner ring of the bearing is rotatably connected with the valve rod (5).