阅读说明：本技术 一种耐高温自动密封蝶阀 (High-temperature-resistant automatic sealing butterfly valve ) 是由 殷爱斌 于 2020-08-20 设计创作，主要内容包括：本发明提供一种耐高温自动密封蝶阀,涉及蝶阀领域。该一种耐高温自动密封蝶阀,包括阀体,所述阀体的内部设置有阀瓣,所述阀瓣的上端设置有阀轴,所述阀轴的下端固定连接有六角卡杆,所述阀轴的下端侧壁固定连接第一O型圈,所述阀轴的侧壁且在第一O型圈的上方设置有锥形件,所述阀轴的侧壁且在锥形件上方设置有调节螺母,所述锥形件和调节螺母之间设置有预紧弹簧,所述阀轴的侧壁且在调节螺母的上方固定连接有第二齿轮,所述阀体上固定连接有驱动电机,所述驱动电机的上端延伸设置有电机轴,所述电机轴的侧壁固定连接有第一齿轮。设置有预紧弹簧,阀在高温和常温来回切换中,也能保证阀轴的密封性。(The invention provides a high-temperature-resistant automatic sealing butterfly valve, and relates to the field of butterfly valves. This high temperature resistant self sealing butterfly valve, including the valve body, the inside of valve body is provided with the valve clack, the upper end of valve clack is provided with the valve shaft, the lower extreme fixedly connected with hexagonal kelly of valve shaft, the first O type circle of lower extreme lateral wall fixed connection of valve shaft, the lateral wall of valve shaft and be provided with the toper piece in the top of first O type circle, the lateral wall of valve shaft and be provided with adjusting nut above the toper piece, be provided with the pretension spring between toper piece and the adjusting nut, the lateral wall of valve shaft and the top fixedly connected with second gear at adjusting nut, fixedly connected with driving motor on the valve body, driving motor's upper end extends and is provided with the motor shaft, the lateral wall fixedly connected with first gear of motor shaft. The valve shaft is provided with the pre-tightening spring, so that the sealing performance of the valve shaft can be ensured in the back-and-forth switching of the valve at high temperature and normal temperature.)

1. The utility model provides a high temperature resistant self sealing butterfly valve, includes valve body (4), its characterized in that: the valve body (4) is internally provided with a valve clack (3), the upper end of the valve clack (3) is provided with a valve shaft (2), the lower end of the valve shaft (2) is fixedly connected with a hexagonal clamping rod (19), the lower end side wall of the valve shaft (2) is fixedly connected with a first O-shaped ring (1), the number of the first O-shaped rings (1) is two, the side wall of the valve shaft (2) is provided with a conical piece (16) above the first O-shaped ring (1), the side wall of the valve shaft (2) is provided with an adjusting nut (13) above the conical piece (16), a pre-tightening spring (14) is arranged between the conical piece (16) and the adjusting nut (13), both ends of the pre-tightening spring (14) are respectively provided with a gasket (15), the gasket (15) below the pre-tightening spring (14) is contacted with the upper end of the conical piece (16), and the gasket (15) above the pre-tightening spring (14) is contacted with the lower end, the utility model discloses a valve shaft, including valve shaft (2), valve body (4), the lateral wall of valve shaft (2) and in the top fixedly connected with second gear (12) of adjusting nut (13), fixedly connected with driving motor (5) on valve body (4), the upper end of driving motor (5) is extended and is provided with the motor shaft, and the motor shaft upwards runs through the inside that valve body (4) extended to valve body (4), the lateral wall of motor shaft and in the inside fixedly connected with first gear (10) of valve body (4), first gear (10) and second gear (12) intermeshing, the upper end of valve body (4) is provided with apron (9), apron (9) are run through to the upper end of valve shaft (2), the top of apron (9) and in the top fixedly connected with sealing member (17) of valve shaft (.

2. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: one side of the valve clack (3) is provided with a first inner hexagonal clamping groove (18), and the first inner hexagonal clamping groove (18) is matched with the hexagonal clamping rod (19).

3. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the valve body (4) has an internal cross-sectional profile and is tapered at a taper (16).

4. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the conical piece (16) is in sliding connection with the valve shaft (2), and the adjusting nut (13) is in threaded connection with the valve shaft (2).

5. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: an adjusting sleeve (21) is arranged below the sealing element (17) and above the valve shaft (2), the adjusting sleeve (21) is in threaded connection with the cover plate (9), and a bayonet is arranged at the upper end of the adjusting sleeve (21).

6. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: be provided with second sealing washer (22) between sealing member (17) and apron (9), be provided with first sealing washer (8) between apron (9) and valve body (4), first sealing washer (8) and second sealing washer (22) be the rubber material.

7. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: second O-shaped rings (11) are arranged between the motor shaft and the valve body (4), the number of the second O-shaped rings (11) is two, and the first O-shaped rings (1) and the second O-shaped rings (11) are made of rubber.

8. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the overlook of apron (9) is the calabash shape, the edge of apron (9) is provided with fixing bolt (7), fixing bolt (7) run through apron (9), valve body (4), the lateral wall of fixing bolt (7) and be provided with fixation nut (6) in the below of valve body (4).

9. The high-temperature resistant automatic sealing butterfly valve according to claim 1, characterized in that: the upper end of the valve shaft (2) is provided with a second inner hexagonal clamping groove (20).

Technical Field

The invention relates to the field of butterfly valves, in particular to a high-temperature-resistant automatic sealing butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

The valve shaft of the existing butterfly valve is simple in sealing, and particularly after multiple times of conversion between high temperature and normal temperature, the aging and abrasion speed of a sealing element is greatly increased. The gap between the valve shaft and the valve body is easily leaked.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a high-temperature-resistant automatic sealing butterfly valve, which solves the problem that the sealing performance of the valve shaft of the existing butterfly valve is poor under the condition of temperature change.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a high-temperature-resistant automatic sealing butterfly valve comprises a valve body, wherein a valve clack is arranged inside the valve body, a valve shaft is arranged at the upper end of the valve clack, a hexagonal clamping rod is fixedly connected at the lower end of the valve shaft, a first O-shaped ring is fixedly connected to the side wall of the lower end of the valve shaft, the number of the first O-shaped rings is two, a conical piece is arranged on the side wall of the valve shaft above the first O-shaped ring, an adjusting nut is arranged on the side wall of the valve shaft above the conical piece, a pre-tightening spring is arranged between the conical piece and the adjusting nut, gaskets are arranged at two ends of the pre-tightening spring, the gaskets below the pre-tightening spring are in contact with the upper end of the conical piece, the gaskets above the pre-tightening spring are in contact with the lower end of the adjusting nut, a second gear is fixedly connected to the side, the upper end of driving motor extends and is provided with the motor shaft, and the motor shaft upwards runs through the inside that the valve body extended to the valve body, the lateral wall of motor shaft and at the first gear of the inside fixedly connected with of valve body, first gear and second gear intermeshing, the upper end of valve body is provided with the apron, the apron is run through to the upper end of valve shaft, the top of apron and at the top fixedly connected with sealing member of valve shaft.

Preferably, one side of the valve clack is provided with a first inner hexagonal clamping groove, and the first inner hexagonal clamping groove is matched with the hexagonal clamping rod.

Preferably, the valve body has an internal cross-sectional profile and is tapered at the taper.

Preferably, the conical member and the valve shaft are in sliding connection, and the adjusting nut and the valve shaft are in threaded connection.

Preferably, an adjusting sleeve is arranged below the sealing element and above the valve shaft, the adjusting sleeve and the cover plate are in threaded connection, and a bayonet is arranged at the upper end of the adjusting sleeve.

Preferably, a second sealing ring is arranged between the sealing element and the cover plate, a first sealing ring is arranged between the cover plate and the valve body, and the first sealing ring and the second sealing ring are made of rubber materials.

Preferably, two second O-shaped rings are arranged between the motor shaft and the valve body, and the first O-shaped ring and the second O-shaped ring are made of rubber.

Preferably, overlook of apron is the calabash shape, the edge of apron is provided with fixing bolt, fixing bolt runs through apron, valve body, fixing bolt's lateral wall just is provided with fixation nut in the below of valve body.

Preferably, the upper end of the valve shaft is provided with a second inner hexagonal clamping groove.

(III) advantageous effects

The invention provides a high-temperature-resistant automatic sealing butterfly valve. The method has the following beneficial effects:

1. according to the invention, three seals are arranged, the first seal is a first O-shaped ring, the second seal is a conical piece, the third seal is a second O-shaped ring, a first seal ring and a third seal ring, especially the second seal ring, the contact area of the conical piece and the inner wall of the valve body is large, the sealing property is favorably improved, even if the valve is changed back and forth at high temperature and normal temperature, the conical piece is only attached to the inner wall of the valve body under the action of a pre-tightening spring, and the sealing property of the valve is ensured.

2. The valve shaft is arranged in the valve body, so that the valve is convenient to open and close, if the driving motor is damaged, the sealing piece can be detached, the valve shaft is rotated by using a tool to realize the opening and closing of the valve, and meanwhile, the valve shaft is positioned in the valve body, so that the sealing performance of the valve is ensured.

3. According to the invention, when the sealing performance between the conical piece and the valve body is reduced, the adjusting sleeve can be rotated to improve the sealing performance between the conical piece and the valve body, when the adjusting sleeve is rotated to be useless, or the adjusting distance influences the meshing transmission of the first gear and the second gear, the cover plate can be opened, and then the adjusting nut is rotated, so that the sealing performance between the conical piece and the valve body is improved, or the conical piece is replaced, the valve has a simple structure, and is easy to disassemble and maintain.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

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

FIG. 3 is a schematic side view of the valve flap of the present invention;

FIG. 4 is a schematic view of the lower end of the valve shaft of the present invention;

FIG. 5 is a schematic upper end view of the valve shaft of the present invention;

fig. 6 is an enlarged view of a portion a in fig. 1.

Wherein, 1, a first O-shaped ring; 2. a valve shaft; 3. a valve flap; 4. a valve body; 5. a drive motor; 6. fixing a nut; 7. fixing the bolt; 8. a first seal ring; 9. a cover plate; 10. a first gear; 11. a second O-ring; 12. a second gear; 13. adjusting the nut; 14. pre-tightening the spring; 15. a gasket; 16. a conical member; 17. a seal member; 18. a first inner hexagonal clamping groove; 19. a hexagonal clamping rod; 20. a second inner hexagonal clamping groove; 21. an adjustment sleeve; 22. and a second seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.