CN216200600U - Be used for special ventilation butterfly valve of flue gas - Google Patents

Abstract

The utility model provides a special ventilation butterfly valve for smoke, wherein a bearing mounting structure is changed, an upper bearing seat, a lower bearing seat, an upper bearing end cover and a lower bearing end cover are added, the original upper and lower valve shafts are changed into a valve rod, and the original internal mounting of a bearing valve body is changed into the external independent mounting of the bearing valve body. The upper and lower bearings are used for fixing the valve rod and enabling the valve rod to only rotate, and controlling the axial and radial movement of the valve rod. By changing the mounting structure of the bearing, the utility model avoids oil stain and impurities in the medium from entering the bearing as much as possible, reduces the friction force of the valve in the using process, prolongs the service life of the valve, saves the use and maintenance cost of the valve and improves the application range of the valve.

Description

Be used for special ventilation butterfly valve of flue gas

Technical Field

The utility model relates to a control device for regulating flow or cutting off gas media, in particular to a special ventilation butterfly valve for smoke.

Background

The structure of the existing special ventilation butterfly valve for flue gas: the structure of the valve mainly comprises a valve body, a valve plate, a lower valve shaft, an upper valve shaft bearing and a lower valve shaft bearing. Firstly, the upper valve shaft bearing and the lower valve shaft bearing are arranged inside the valve body, oil dirt and impurities in a pipeline medium enter the bearing through a gap between the valve rod and the valve body, and form greasiness on a bearing rolling structure part, so that the bearing is easy to block and damage, the valve is difficult to open and close or cannot be opened and closed, and the service life of the bearing is shortened. Secondly, the bearing belongs to the wearing parts, installs in the valve body inside and is unfavorable for routine maintenance, maintenance and change. And the bearing is arranged in the valve body, so that the lubricating grease coated on the bearing is easily damaged when a high-temperature medium passes through the bearing, and the service life of the bearing is shortened. Finally, the use of the upper and lower valve shafts increases the difficulty of production.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the technical problem to be solved by the present invention is: the structure of current ventilation butterfly valve, because the upper and lower bearing is installed inside the valve body, greasy dirt, impurity in the pipeline medium get into the bearing rolling structure easily in, are unfavorable for routine maintenance, maintenance and change, and the lubricating grease that coats on the bearing is destroyed easily when the high temperature medium passes through, uses two upper and lower valve shafts to increase the production degree of difficulty and cost.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a be used for special ventilation butterfly valve of flue gas, its structure includes: the valve packing structure comprises a lower bearing end cover 1, a lower bearing 2, a lower bearing seat 3, a valve body 4, a valve plate assembly 5, a valve rod 6, an upper packing gland 7, an upper bearing end cover 8, an upper bearing 9, an upper bearing seat 10, upper packing 12, an upper packing base 13, a lower packing base 15, lower packing 16 and a lower packing gland 17; the lower bearing end cover 1 is arranged on the lower bearing seat 3 through a hexagon screw 11, the lower bearing end cover 1 is used for pressing the outer ring of the lower bearing 2, fixing the bearing and adjusting the axial clearance; the upper bearing seat 10 is fixed on the upper part of the valve body 4 by a hexagon screw 11; the lower bearing 2 is arranged in the lower bearing seat 3; the lower bearing seat 3 is fixed on the lower part of the valve body 4 by a hexagon screw 11; the valve plate assembly 5 and the valve rod 6 are fixedly connected through a threaded pin shaft 14, and the valve rod can drive the valve plate assembly to rotate simultaneously to achieve the states of opening and closing the valve; the upper part of the valve rod 6 is arranged in the inner ring of the upper bearing 9; the lower part of the valve rod 6 is arranged in the inner ring of the lower bearing 2; the upper bearing end cover 8 is arranged on the upper bearing seat 10 through a hexagon screw 11, the upper bearing end cover 8 is used for pressing the outer ring of the upper bearing 9, fixing the bearing and adjusting the axial clearance; the upper bearing 9 is mounted in an upper bearing housing 10.

In the use process, the valve rod drives the valve plate to rotate, and the valve plate and the sealing surface of the valve body have a rotation angle of 0-90 degrees, so that the valve can be opened and closed. The opening degree of the valve is different according to different valve opening angles, and the purpose of controlling the medium flow is achieved. The valve position is closed at 0 degree, and is fully opened at 90 degrees. The upper and lower bearings are used for fixing the valve rod and enabling the valve rod to only rotate, and controlling the axial and radial movement of the valve rod.

When the high-temperature medium passes through, the temperature of the valve body is almost equal to the temperature of the medium through heat conduction, the temperature of the bearing is equal to the temperature of the valve body and is also equal to the temperature of the medium, the lubricating grease coated on the bearing is melted or burnt, the lubricating grease loses the lubricating effect or reacts due to burning, the rotating friction force of the valve rod is increased, and the service life of the bearing is shortened. The bearing mounting part is far away from the valve body, the heat transferred to the bearing through the medium is less, the temperature of the bearing is far lower than that of the high-temperature medium, and lubricating grease coated on the bearing cannot be melted or burnt or carbonized.

The utility model has the beneficial effects that: through changing the mounting structure of bearing, inside having avoided greasy dirt, the impurity in the medium to get into the bearing as far as possible, reduced the frictional force of valve use, prolonged the life of valve, practiced thrift the use and the maintenance cost of valve, improved the application range of valve.

Drawings

FIG. 1 is a schematic structural view of a smoke special ventilation butterfly valve of the present invention;

in the figure: 1. a lower bearing end cap; 2. a lower bearing; 3. a lower bearing seat; 4. a valve body; 5. a valve plate assembly; 6. a valve stem; 7. a packing gland is arranged; 8. an upper bearing end cover; 9. an upper bearing; 10. an upper bearing seat; 11. a hex screw; 12. filling; 13. an upper filler base; 14. a threaded pin shaft; 15. a lower packing base; 16. lower filling; 17. and (5) a lower packing gland.

Detailed Description

The present application is illustrated below by way of examples.

As shown in fig. 1, the present invention provides a special ventilation butterfly valve for smoke, which structurally comprises: the valve packing structure comprises a lower bearing end cover 1, a lower bearing 2, a lower bearing seat 3, a valve body 4, a valve plate assembly 5, a valve rod 6, an upper packing gland 7, an upper bearing end cover 8, an upper bearing 9, an upper bearing seat 10, upper packing 12, an upper packing base 13, a lower packing base 15, lower packing 16 and a lower packing gland 17; the lower bearing end cover 1 is arranged on the lower bearing seat 3 through a hexagon screw 11, the lower bearing end cover 1 is used for pressing the outer ring of the lower bearing 2, fixing the bearing and adjusting the axial clearance; the upper bearing seat 10 is fixed on the upper part of the valve body 4 by a hexagon screw 11; the lower bearing 2 is arranged in the lower bearing seat 3; the lower bearing seat 3 is fixed on the lower part of the valve body 4 by a hexagon screw 11; the valve plate assembly 5 and the valve rod 6 are fixedly connected through a threaded pin shaft 14, and the valve rod can drive the valve plate assembly to rotate simultaneously to achieve the states of opening and closing the valve; the upper part of the valve rod 6 is arranged in the inner ring of the upper bearing 9; the lower part of the valve rod 6 is arranged in the inner ring of the lower bearing 2; the upper bearing end cover 8 is arranged on the upper bearing seat 10 through a hexagon screw 11, the upper bearing end cover 8 is used for pressing the outer ring of the upper bearing 9, fixing the bearing and adjusting the axial clearance; the upper bearing 9 is mounted in an upper bearing housing 10.

The bearing mounting structure of the utility model is changed, the upper and lower bearing seats and the upper and lower bearing end covers are added, the original upper and lower valve shafts are changed into a valve rod, and the original internal mounting of the bearing valve body is changed into the external independent mounting of the bearing valve body. When the high-temperature medium passes through, the temperature of the valve body is almost equal to the temperature of the medium through heat conduction, the temperature of the bearing is equal to the temperature of the valve body and is also equal to the temperature of the medium, the lubricating grease coated on the bearing is melted or burnt, the lubricating grease loses the lubricating effect or reacts due to burning, the rotating friction force of the valve rod is increased, and the service life of the bearing is shortened. The bearing mounting part is far away from the valve body, the heat transferred to the bearing through the medium is less, the temperature of the bearing is far lower than that of the high-temperature medium, and lubricating grease coated on the bearing cannot be melted or burnt or carbonized.

Claims (1)

1. A is used for special ventilation butterfly valve of flue gas, its structure includes: the valve packing device comprises a lower bearing end cover (1), a lower bearing (2), a lower bearing seat (3), a valve body (4), a valve plate assembly (5), a valve rod (6), an upper packing gland (7), an upper bearing end cover (8), an upper bearing (9), an upper bearing seat (10), an upper packing (12), an upper packing base (13), a lower packing base (15), a lower packing (16) and a lower packing gland (17); the bearing is characterized in that a lower bearing end cover (1) is arranged on a lower bearing seat (3) through a hexagon screw (11), the lower bearing end cover (1) is used for pressing an outer ring of a lower bearing (2) to fix the bearing and adjust an axial clearance; the upper bearing seat (10) is fixed on the upper part of the valve body (4) by a hexagon screw (11); the lower bearing (2) is arranged in the lower bearing seat (3); the lower bearing seat (3) is fixed at the lower part of the valve body (4) by a hexagon screw (11); the valve plate assembly (5) is fixedly connected with the valve rod (6) through a threaded pin shaft (14), and the valve rod can drive the valve plate assembly to rotate simultaneously to achieve the states of opening and closing the valve; the upper part of the valve rod (6) is arranged in the inner ring of the upper bearing (9); the lower part of the valve rod (6) is arranged in the inner ring of the lower bearing (2); the upper bearing end cover (8) is arranged on the upper bearing seat (10) through a hexagon screw (11), the upper bearing end cover (8) is used for pressing the outer ring of the upper bearing (9), fixing the bearing and adjusting the axial clearance; the upper bearing (9) is arranged in the upper bearing seat (10).

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