CN211624378U - Special butterfly valve for solar power generation - Google Patents

Abstract

The utility model discloses a special butterfly valve of solar energy power generation, including valve body, valve rod and butterfly plate, be equipped with the valve pocket that link up before the valve body, back both ends in the valve body, the valve rod runs through at the top of valve body, end both ends, and the butterfly plate is located the valve pocket and connects on the valve rod, is equipped with the axle sleeve between valve body and valve rod, connects fluid pipeline on the valve body, has cup jointed the U-shaped sealing washer on the valve rod, and the neighbouring valve pocket department of valve body inner wall is equipped with U-shaped sealing washer location step, and U-shaped sealing washer butt is between axle sleeve terminal surface and U-. This special butterfly valve of solar energy power generation needs to adapt to fused salt medium operating mode, and valve rod and valve pocket medium boundary region adopt U type sealing washer, can prevent effectively that on the infiltration valve rod in the medium and the rotation fitting surface of axle sleeve, prevent that salt in the fused salt medium from appearing the crystallization, blocks dead valve rod or accelerate valve rod wearing and tearing and then lead to the valve inefficacy.

Description

Special butterfly valve for solar power generation

Technical Field

The utility model relates to a valve, more specifically say, it relates to a special butterfly valve of solar energy power generation.

Background

Solar energy is a clean and efficient energy source. Under the background that environmental problems are becoming more and more prominent, solar energy is becoming more and more popular as a clean energy source. Solar energy application technology has also been rapidly developed due to this trend. Some scaled solar companies are seeking to store electrical energy generated on sunny days, one option being to use a molten salt medium. The molten salt can be used for solar thermal power generation, and the molten salt solar power generation technology utilizes strong mirror surfaces to focus solar heat to generate steam so as to drive a power generation turbine. The surplus heat generated during the day can also be used to heat large amounts of salt, which can absorb considerable amounts of heat. When the sun falls on the mountain or in rainy and cloudy days, the heat stored in the molten salt is used for generating steam to drive the power generation turbine. At present, valves used by solar key equipment are mainly of a cut-off valve type, and comprise five types including a gate valve, a stop valve, a check valve, a butterfly valve and a ball valve. The butterfly valve which has been developed most rapidly in recent years is also becoming more important in the application of solar power generation. The solar butterfly valve adopts an extension valve rod structure, has the characteristics of small flow resistance, quick opening and closing, reliable sealing, convenient maintenance and the like, is more and more applied under the high-temperature working condition, has high technological content of the valve, large design and development investment and high product processing and testing difficulty, and is always a bottleneck for the rapid development of the high-temperature valve industry and the long-period safe operation of a system. The working condition of the butterfly valve applicable to the molten salt medium in the solar industry is more complex and severe, and the service life of the butterfly valve is more susceptible, so that the development of strengthening the butterfly valve is imperative. The invention patent application with publication number CN106016978A discloses a butterfly valve in 2016, month 10 and day 12, which comprises a valve body, a butterfly plate and a valve shaft, wherein the butterfly plate is arranged in the valve body, the valve shaft is connected with the butterfly plate, the valve shaft is rotated to move the butterfly plate and control the opening/closing of the valve body, the butterfly valve comprises a sealing element and a power device used for moving the sealing element to seal or release the sealing between the butterfly plate and the valve body. The utility model has the advantages that: by arranging the power device, the opening/closing of the butterfly valve and the sealing of the butterfly valve are respectively and independently carried out, so that the abrasion of a sealing element is reduced, the sealing effect is improved, and the service life of the sealing element is prolonged; secondly, in the process of opening the butterfly valve, the sealing is firstly released, and then the butterfly plate is driven to move, so that the opening force of the butterfly valve is greatly reduced, and the butterfly valve is easier to open. The butterfly valve is not specially modified for the working conditions using the molten salt medium.

SUMMERY OF THE UTILITY MODEL

Current butterfly valve when being applied to the fused salt medium, can lead to the butterfly valve to become invalid too early because of complicated abominable operating mode card valve rod or accelerate valve rod wearing and tearing, shorten life, for overcoming this defect, the utility model provides a can adapt to fused salt medium operating mode better, can prevent effectively that on the fitting surface of rotation of infiltration valve rod and axle sleeve in the medium, prevent that the salt in the fused salt medium from appearing the crystallization, the card valve rod or accelerate valve rod wearing and tearing and then lead to the special butterfly valve of solar energy power generation of valve inefficacy.

The technical scheme of the utility model is that: the utility model provides a special butterfly valve of solar energy power generation, includes valve body, valve rod and butterfly plate, is equipped with the valve pocket that link up before the valve body, back both ends in the valve body, and the valve rod runs through at the top of valve body, end both ends, and the butterfly plate is located the valve pocket and connects on the valve rod, is equipped with the axle sleeve between valve body and valve rod, connects the fluid pipeline on the valve body, has cup jointed the U-shaped sealing washer on the valve rod, and the adjacent valve pocket department of valve body inner wall is equipped with U-shaped sealing washer location step, and U-shaped sealing washer butt is between. This special butterfly valve of solar energy power generation needs to adapt to fused salt medium operating mode, and valve rod and valve pocket medium boundary region adopt U type sealing washer, can prevent effectively that on the infiltration valve rod in the medium and the rotation fitting surface of axle sleeve, prevent that salt in the fused salt medium from appearing the crystallization, blocks dead valve rod or accelerate valve rod wearing and tearing and then lead to the valve inefficacy.

Preferably, a butterfly plate sealing ring is fixedly arranged on the butterfly plate, and the outer edge of the butterfly plate sealing ring exceeds the outer edge of the butterfly plate. The butterfly plate sealing ring is arranged, so that the butterfly plate and the valve body can realize sealing and cutoff softly and tightly, and the influence on the service life of the valve due to direct rigid collision and friction of the butterfly plate and the valve body is avoided.

Preferably, the top end of the valve body is connected with a connecting pipe, and the valve rod penetrates through the connecting pipe and is connected with the output end of a pneumatic actuator. The pneumatic actuating mechanism outputs power to drive the valve rod to rotate, so that the butterfly plate is driven to rotate, and the butterfly plate is switched between a parallel state and a vertical state relative to the valve cavity, so that the on-off control of the butterfly valve is realized.

Preferably, the top end of the connecting pipe is provided with a frame-shaped support, the bottom of the frame-shaped support is connected with the connecting pipe, and the top of the frame-shaped support is connected with the pneumatic actuating mechanism. The frame-shaped support can establish reliable connection between the connecting pipe and the pneumatic actuating mechanism, and ensures that the output power of the pneumatic actuating mechanism is accurately and stably transmitted.

Preferably, a high-temperature oxidation resistant filler is arranged between the inner wall of the connecting pipe and the valve rod. The high-temperature oxidation resistant filler is arranged, so that sealing can be effectively guaranteed under the high-temperature condition, and the leakage of the medium at the filler part can be effectively prevented.

Preferably, the U-shaped opening of the U-shaped sealing ring faces the valve cavity. The medium that circulates in the valve pocket has pressure, and the U-shaped mouth of U-shaped sealing washer is towards the valve pocket, and the U-shaped mouth pressure-bearing has the trend of propping big under the pressure effect for U-shaped mouth both sides respectively with valve rod, valve body laminating more closely, improve sealing performance.

Preferably, the valve body is welded to the fluid conduit. The fluid input end and the fluid output end of the valve body are directly welded with the fluid pipeline, so that leakage points can be reduced.

The utility model has the advantages that:

better adapt to the working condition of the molten salt medium and ensure the normal service life. The utility model discloses valve rod and valve pocket medium boundary area adopt U type sealing washer, can prevent effectively that the salt in the medium from appearing the crystallization on the rotation fitting surface of infiltration valve rod and axle sleeve, the card dies the valve rod or accelerates valve rod wearing and tearing and then lead to the valve inefficacy to avoid the valve to scrap too early.

Drawings

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

FIG. 2 is a schematic view of the fitting structure of the valve rod and the high temperature oxidation resistant filler of the present invention;

FIG. 3 is a schematic view of the fitting structure between the U-shaped seal ring and the valve rod and valve body of the present invention;

fig. 4 is a schematic view of the matching structure between the middle butterfly plate and the valve body of the present invention.

In the figure, 1-a pneumatic actuator, 2-a valve rod, 3-a connecting pipe, 4-a valve body, 5-an upper shaft sleeve, 6-a lower U-shaped sealing ring, 7-a lower shaft sleeve, 8-a bottom cover, 9-an upper U-shaped sealing ring, 10-a butterfly plate sealing ring, 11-a sealing ring pressing plate, 12-high-temperature oxidation resistant filler, 13-a valve cavity, 14-a butterfly plate and 15-a frame-shaped support.

Detailed Description

The present invention will be further described with reference to the following detailed description of the embodiments.

Example (b):

as shown in fig. 1 to 4, a special butterfly valve of solar energy power generation, including valve body 4, valve rod 2 and butterfly plate 14, it is preceding to be equipped with the valve body 4 that link up in the valve body 4, the valve pocket 13 at back both ends, valve rod 2 runs through the top at valve body 4, end both ends, butterfly plate 14 is located the valve pocket 13 and connects on valve rod 2, interference tight fit has the axle sleeve between valve body 4 and the valve rod 2, the axle sleeve includes upper shaft sleeve 5 and lower axle sleeve 7, upper shaft sleeve 5 and lower axle sleeve 7 are inlayed respectively in the top of valve body 4, in the valve rod through hole of bottom, the U-shaped sealing washer has been cup jointed on the valve rod 2, the cross-section of U-shaped sealing washer is the U-shaped, the U-shaped mouth. The U-shaped sealing ring comprises an upper U-shaped sealing ring 9 and a lower U-shaped sealing ring 6, U-shaped sealing ring positioning steps corresponding to the U-shaped sealing rings are arranged at the position, close to the valve cavity, of the inner wall of the valve body 4, the upper U-shaped sealing ring 9 abuts between the end face of the upper shaft sleeve 5 and the U-shaped sealing ring positioning steps, and the lower U-shaped sealing ring 6 abuts between the end face of the lower shaft sleeve 7 and the U-shaped sealing ring positioning steps. A butterfly plate sealing ring 10 is fixed on a butterfly plate 14, the butterfly plate sealing ring 10 is coaxial with the butterfly plate 14, a sealing ring pressing plate 11 is pressed outside the butterfly plate sealing ring 10, the sealing ring pressing plate 11 is connected with the butterfly plate through a bolt, the butterfly plate sealing ring 10 is clamped between the sealing ring pressing plate 11 and the butterfly plate 14, and the outer edge of the butterfly plate sealing ring 10 slightly exceeds the outer edge of the butterfly plate. The top end of the valve body 4 is connected with a connecting pipe 3, the valve rod 2 penetrates through the connecting pipe 3 and is connected with the output end of a pneumatic actuating mechanism 1, and the pneumatic actuating mechanism 1 is a rotary cylinder. The top end of the connecting pipe 3 is provided with a frame-shaped support 15 which is approximately rectangular, the bottom of the frame-shaped support 15 is connected with the connecting pipe 3 through a bolt, and the top of the frame-shaped support 15 is connected with the pneumatic actuating mechanism 1 through a bolt. A woven high-temperature-resistant oxidation filler 12 is arranged between the inner wall of the connecting pipe 3 and the valve rod 2. The front end and the rear end of the valve body 4 are respectively welded with a fluid pipeline, so that the valve cavity 13 is communicated with the fluid pipeline. A bottom cover 8 is installed at the port of the valve rod penetrating hole at the bottom end of the valve body 4, and the bottom cover 8 is fixed at the bottom end of the valve body 4 through a bolt.

The pneumatic actuating mechanism 1 outputs power under the control of a control signal, drives the valve rod 2 to rotate, further drives the butterfly plate 14 to rotate, and switches between a state parallel to the axis of the valve cavity and a state perpendicular to the axis of the valve cavity, so that the on-off control of the butterfly valve is realized. When the special butterfly valve for solar power generation is switched on, because the medium circulating in the valve cavity 13 has pressure, the U-shaped opening of the U-shaped sealing ring faces the valve cavity 13, the U-shaped opening bears pressure, and under the action of the pressure, the U-shaped opening has the tendency of being expanded, so that two sides of the U-shaped opening are respectively attached to the valve rod 2 and the valve body 4 more tightly, and the sealing performance is improved.

Claims (7)

1. The utility model provides a special butterfly valve of solar energy power generation, including valve body (4), valve rod (2) and butterfly plate (14), it is preceding to be equipped with in valve body (4) to link up valve body (4), valve pocket (13) at back both ends, valve rod (2) run through the top at valve body (4), end both ends, butterfly plate (14) are located valve pocket (13) and connect on valve rod (2), be equipped with the axle sleeve between valve body (4) and valve rod (2), connect the fluid pipeline on valve body (4), characterized by has cup jointed the U-shaped sealing washer on valve rod (2), the neighbouring valve pocket department of valve body (4) inner wall is equipped with U-shaped sealing washer location step, U-shaped sealing washer butt is between axle sleeve terminal surface and U-shaped sealing washer location step.

2. The butterfly valve special for solar power generation as claimed in claim 1, wherein the butterfly plate (14) is fixedly provided with a butterfly plate sealing ring (10), and the outer edge of the butterfly plate sealing ring (10) exceeds the outer edge of the butterfly plate (14).

3. The butterfly valve special for solar power generation as claimed in claim 1, wherein the top end of the valve body (4) is connected with a connecting pipe (3), and the valve rod (2) penetrates through the connecting pipe (3) and is connected with the output end of a pneumatic actuator (1).

4. The butterfly valve special for solar power generation as claimed in claim 3, wherein the top end of the connecting pipe (3) is provided with a frame-shaped bracket (15), the bottom of the frame-shaped bracket (15) is connected with the connecting pipe (3), and the top of the frame-shaped bracket (15) is connected with the pneumatic actuator (1).

5. The butterfly valve special for solar power generation as claimed in claim 1, wherein a high temperature oxidation resistant filler (12) is arranged between the inner wall of the connecting pipe (3) and the valve rod (2).

6. The butterfly valve special for solar power generation according to claim 1, wherein the U-shaped opening of the U-shaped sealing ring faces the valve cavity (13).

7. The butterfly valve special for solar power generation according to claim 1, 2, 3, 4, 5 or 6, wherein the valve body (4) is welded with the fluid pipeline.

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