CN204985737U - Remove dust with pneumatic seal valve of integral type - Google Patents

Abstract

The utility model discloses an integrated pneumatic sealing valve for dust removal. The bottom of the sealing tube is fixed on the closed casing, the upper part of the sealing tube is fixed to the lower part of the cylinder, the edge of the upper valve plate is close to the silicone sealing ring I, and the lower The edge of the valve plate is close to the silicone sealing ring II, the circular sealing pad is located at the bottom of the sealing tube, and its edge is close to the inner tube wall of the sealing tube, the compressed air tubes are respectively inserted into the left and right side walls of the sealing shell, and Its outlet is located on the inner tube wall between the valve plate and the lower valve plate. The utility model can not only adapt to the high-temperature operating environment, effectively prevent dust accumulation, but also can be opened frequently without affecting the sealing performance, while ensuring a good sealing effect, the utility model increases the service life, has a simple structure and is widely applicable.

Description

Integrated pneumatic sealing valve for dust removal

technical field

The utility model relates to a sealing valve.

Background technique

At present, pre-installed valves such as flap valves and flapper valves are generally used in large and medium-sized flue gas pipelines, but such devices cannot meet the requirements of dust removal equipment for sealing and operating conditions. During the operation of the dust collector, the sealing valve should not only adapt to the erosion of high-temperature flue gas and the accumulation of dust, but also ensure that it always maintains good sealing performance during frequent switching operations. There are many problems in the existing flap valve and flapper valve in the dust collector: firstly, the motor cannot operate in a high temperature environment (between 130-170 degrees Celsius); secondly, dust accumulates in the sealing part, which directly affects the sealing effect; thirdly , When the sealing valve is frequently used, the sealing rubber strip will rapidly age and deform, and the sealing performance cannot be guaranteed.

Contents of the invention

In order to solve the above existing problems, the utility model provides an integrated pneumatic sealing valve for dust removal with good sealing performance. In order to achieve the above purpose, the utility model is realized through the following technical solutions:

Including cylinder, guide rod, closed shell, upper valve plate, lower valve plate, compressed air pipe and sealing tube, the bottom of the sealing tube is fixed on the closed shell, the upper part of the sealing tube is fixed with the lower part of the cylinder, the closed shell There is a circular hole on the top of the valve, the diameter of the circular hole is the same as the inner diameter of the sealing tube, and the circular hole is located directly below the sealing tube, so that the inside of the sealing tube communicates with the inside of the closed shell; the upper valve plate and the lower valve plate The valve plate is located inside the closed shell. The upper valve plate and the lower valve plate are in the shape of circular plates placed horizontally. The diameter of the upper valve plate is slightly larger than that of the lower valve plate, and there is a certain gap between them. The upper part of the guide rod Set in the sealing tube, and the upper end of the guide rod is fixed with the lower end of the cylinder, the lower part of the guide rod is located in the closed shell, and the lower end of the guide rod is fixed with the upper valve plate and the lower valve plate, and the middle part of the guide rod is fixed with a circular sealing pad; The bottom of the closed shell is a stepped circular pipe wall. The inner diameter of the circular pipe wall located on the lower step is equal to the plate diameter of the lower valve plate. The silica gel sealing ring I is fixed on the pipe wall, and the inner diameter of the circular pipe wall located on the upper step is equal to The plate diameter of the upper valve plate is fixed with a silica gel sealing ring II on the tube wall, and the rest of the closed shell is a square tube wall, and the diameter of the tube wall is equal to the plate diameter of the upper valve plate; when the sealing valve is closed, the upper valve The plate edge of the plate is close to the silicone sealing ring Ⅰ, the plate edge of the lower valve plate is close to the silicone sealing ring Ⅱ, the circular sealing pad is located at the bottom of the sealing tube, and its edge is close to the inner tube wall of the sealing tube, the compressed air tube They are respectively inserted into the left and right side walls of the closed housing, and the outlets are located at the position of the inner pipe wall between the valve plate and the lower valve plate.

The utility model adopts double-layer valve plates for sealing, and the sealing element adopts high-temperature silica gel strips (which can be used for a long time below 500 degrees Celsius); when the valve is closed, compressed air is injected between the double-layer valve plates to keep the sealed space in a positive pressure state to prevent Dust-laden smoke enters the sealed space, and the smoke that has entered is purged; the cylinder is used as the actuator to drive the opening and closing of the valve through compressed air, combined with the sealing element made of high-temperature silicone material, the original hard seal is changed to soft Sealing, while keeping the double-layer valve plate in a moderately excessive deformation state at the same time, strengthening the sealing effect.

The utility model can not only adapt to the high-temperature operating environment, effectively prevent dust accumulation, but also can be opened frequently without affecting the sealing performance, while ensuring a good sealing effect, the utility model increases the service life, has a simple structure and is widely applicable.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is a top view of FIG. 1 .

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, the bottom of the sealing tube 7 is fixed on the closed casing 3, the top of the sealing tube 7 is fixed to the bottom of the cylinder 1, and the top of the sealing casing 3 is provided with a circular hole. The hole diameter is the same as the inner diameter of the sealing tube 7, and the round hole is located directly below the sealing tube 7, so that the inside of the sealing tube 7 communicates with the inside of the closed casing 3; the upper valve plate 4 and the lower valve plate 5 are located in the closed casing Inside the body 3, the upper valve plate 4 and the lower valve plate 5 are discs placed horizontally, the diameter of the upper valve plate 4 is slightly larger than the diameter of the lower valve plate 5, and there is a certain gap between them. The upper part is set in the sealing tube 7, and the upper end of the guide rod 2 is fixed to the lower end of the cylinder 1, the lower part of the guide rod 2 is located in the closed casing 3, and the lower end of the guide rod 2 is fixed to the upper valve plate 4 and the lower valve plate 5, The middle part of the guide rod 2 is fixed with a circular sealing gasket 8; the bottom of the closed shell 3 is a stepped circular tube wall, and the inner diameter of the circular tube wall located at the lower step is equal to the plate diameter of the lower valve plate 5, and the tube wall is fixed with a Silica gel sealing ring Ⅰ9, the inner diameter of the circular pipe wall located on the upper step is equal to the plate diameter of the upper valve plate 4, and the silica gel sealing ring Ⅱ10 is fixed on the pipe wall, and the rest of the closed shell 3 is a square pipe wall, and the diameter of the pipe wall is Equal to the plate diameter of upper valve plate 4.

When the sealing valve is closed, the cylinder 1 drives the guide rod 2, the upper valve plate 4, and the lower valve plate 5 to move to the bottom of the closed casing 3, which is the smoke inlet, and when the stroke of the cylinder 1 is reached, the movement stops. At this time, the plate edge of the upper valve plate 4 is close to the silicone sealing ring I9, the plate edge of the lower valve plate 5 is close to the silicone sealing ring II10, and the circular sealing pad 8 is located at the bottom of the sealing tube 7, and its edge is close to the sealing tube 7 On the inner pipe wall, and then close the flue gas inlet. The compressed air pipes 6 are respectively inserted into the left and right side walls of the closed housing 3, and their outlets are located at the position of the inner pipe wall between the valve plate 4 and the lower valve plate 5. Compressed air enters the closed space formed by the upper valve plate 4 and the lower valve plate 5 through the compressed air pipe 6 to form a relatively high pressure to prevent smoke leakage caused by improper sealing.

When the sealing valve is opened, the input of compressed air is stopped, the cylinder 1 is lifted, and the guide rod 2 and the upper valve plate 4 and the lower valve plate 5 are moved upward, the valve is opened, and the smoke is allowed to pass. The sealing of the top of the pipe 7 prevents the flue gas from leaking from the sealed pipe 7 .

Claims (1)

1. An integrated pneumatic sealing valve for dust removal, including cylinder (1), guide rod (2), closed shell (3), upper valve plate (4), lower valve plate (5), compressed air pipe (6 ) and sealing tube (7), characterized in that: the bottom of the sealing tube (7) is fixed on the closed casing (3), the upper part of the sealing tube (7) is fixed with the lower part of the cylinder (1), and the sealing casing ( 3) There is a round hole on the top, the diameter of the round hole is the same as the inner diameter of the sealing tube (7), and the round hole is located directly below the sealing tube (7), so that the inside of the sealing tube (7) and the sealing shell The inside of the body (3) is connected; the upper valve plate (4) and the lower valve plate (5) are located inside the closed shell (3), and the upper valve plate (4) and the lower valve plate (5) are placed horizontally Disc shape, the diameter of the upper valve plate (4) is slightly larger than the diameter of the lower valve plate (5), and there is a certain gap between them, the upper part of the guide rod (2) is set in the sealing tube (7), and the guide rod (2) The upper end is fixed to the lower end of the cylinder (1), the lower part of the guide rod (2) is located in the closed casing (3), and the lower end of the guide rod (2) is connected to the upper valve plate (4) and the lower valve plate (5) The middle part of the guide rod (2) is fixed with a circular sealing gasket (8); the bottom of the closed shell (3) is a stepped circular pipe wall, and the inner diameter of the circular pipe wall located at the lower step is equal to that of the lower valve plate (5 ), a silicone sealing ring Ⅰ (9) is fixed on the tube wall, the inner diameter of the circular tube wall located on the upper step is equal to the plate diameter of the upper valve plate (4), and a silicone sealing ring Ⅱ ( 10), the remaining part of the closed shell (3) is a square pipe wall, and the diameter of the pipe wall is equal to the plate diameter of the upper valve plate (4); when the sealing valve is closed, the plate edge of the upper valve plate (4) is close to the Silicone sealing ring Ⅰ (9), the edge of the lower valve plate (5) is close to the silicone sealing ring Ⅱ (10), the circular sealing gasket (8) is located at the bottom of the sealing tube (7), and its edge is close to the sealing tube On the inner pipe wall of (7), the compressed air pipe (6) is respectively inserted into the left and right side walls of the closed casing (3), and its outlet is located on the inner pipe wall between the valve plate (4) and the lower valve plate (5) position in between.