Dust butterfly valve for zinc powder conveying pipeline and stock bin unloading

Abstract

The utility model relates to the technical field of zinc powder conveying machinery, in particular to a dust butterfly valve for zinc powder conveying pipelines and stock bin unloading, which comprises a valve body and a valve rod arranged in the valve body, and is characterized in that valve rod sealing washers and bearings are sequentially arranged at two ends of the valve rod, sealing pieces are arranged at two axial ends of the bearings, and the valve rod sealing washers are connected with the bearings. A valve plate is arranged on the valve rod, a valve plate sealing ring is arranged on the outer ring of the valve plate, a chamfer for blocking dust is arranged at the joint of the valve rod and the valve plate, and a sealing cover is arranged on the valve body and matched with the tail end of the valve rod. Sealing failure caused by serious abrasion of the valve plate sealing ring is prevented by arranging the valve rod sealing supporting ring and the bearing, the contact area between the valve plate and the valve plate sealing ring is increased by arranging the valve plate reinforcing ring, the sealing strength is improved, the sealing effect of the valve rod part is enhanced by arranging the sealing piece and the chamfer, and finally the sealing effect is improved by arranging the sealing cover. The sealing problem of the butterfly valve in zinc powder conveying is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc powder conveying machinery, in particular to a dust butterfly valve used for zinc powder conveying pipelines and silo unloading. Background Art

[0002] The butterfly valve is a commonly used valve type, mainly used to cut off, connect and adjust the medium in the pipeline. Its main features are simple structure, small size, light weight, easy operation, and good fluid control characteristics and sealing performance. In the process of zinc powder transmission, the main function of the butterfly valve is to adjust and control the flow of zinc powder to ensure the stable operation of the system.

[0003] Since the specific gravity of zinc powder is usually greater than 3, its specific gravity is relatively large compared to conventional powder materials. When there is a lot of material in the silo, the valve plate will be subjected to a strong radial force, so that the valve stem cannot be stably centered, resulting in the valve stem squeezing the valve plate sealing ring. Since the valve plate sealing ring is usually made of silicone, when it is squeezed, the valve plate flips over, causing the valve plate sealing ring to wear rapidly and the valve body sealing performance to fail; and when there is positive pressure in the conveying pipeline, due to insufficient sealing performance of the valve stem, dust is easy to escape along the valve stem to the external space, causing dust leakage. Therefore, a dust butterfly valve for zinc powder conveying pipelines and silo unloading is needed to solve the sealing problem of butterfly valves in zinc powder conveying. Utility Model Content

[0004] The utility model aims to solve the sealing problem of butterfly valve devices in zinc powder transportation by providing a dust butterfly valve for zinc powder transportation pipeline and silo unloading, by arranging valve stem sealing support rings and bearings to prevent the valve plate sealing ring from severe wear and sealing failure, arranging valve plate reinforcement rings to increase the contact area between the valve plate and the valve plate sealing ring and improve the sealing strength, and then arranging sealing elements and chamfers to strengthen the sealing effect of the valve stem, and finally arranging a sealing cover to solve the sealing problem of butterfly valves in zinc powder transportation.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes a valve body, a valve stem is arranged in the valve body, valve stem sealing washers and bearings are arranged at both ends of the valve stem in turn, sealing members are arranged at both axial ends of the bearing, a valve plate is arranged on the valve stem, a valve plate sealing ring is arranged on the outer ring of the valve plate, a chamfer for blocking dust is arranged at the connection between the valve stem and the valve plate, and a sealing cover is arranged on the valve body to adapt to the end of the valve stem.

[0006] In order to avoid failure of the sealing performance of the valve plate sealing ring, a valve stem sealing gasket and a bearing are provided to provide radial support for the valve stem to prevent the valve stem from not being able to remain aligned, causing the valve plate sealing ring to wear and seal failure; sealing members are provided at both axial ends of the bearing to prevent powder in the pipeline from entering the bearing and overflowing due to positive pressure, causing dust leakage, and improving the bearing sealing effect; by designing chamfers of bends or turns, the contact area of ​​the connection is increased, so that the dust will encounter more resistance and pressure loss when passing through the sealing channel, thereby improving the sealing strength of the valve stem and avoiding powder from entering the gap between the valve stem and the valve plate sealing ring, causing the valve plate sealing ring to wear or jamming the valve plate; the sealing treatment of the sealing cover can prevent dust from overflowing out of the valve body.

[0007] As a preferred solution of the utility model, the valve stem sealing gasket is a nylon gasket, the valve body is provided with a nylon gasket slot, the sealing member is a felt ring, the valve body is provided with a felt ring slot, and the adapter bearing on the valve body is provided with a bearing slot. The nylon gasket has good toughness and strength, and can absorb and disperse radial force through elastic deformation, thereby reducing the impact on the rotating shaft and other mechanical parts. The nylon gasket slot is conducive to positioning and fixing the nylon gasket, and can also improve the sealing effect. The felt ring has certain elasticity and compressibility, and can deform when subjected to force, so as to adapt to various sealing environments, and can also effectively reduce the impact and vibration of the butterfly valve on the bearing, protect the sealing surface and the bearing, the felt ring slot is conducive to positioning and fixing the felt ring, and can also improve the sealing effect. The bearing slot is also conducive to positioning and fixing the bearing to prevent the bearing from shifting or shaking during operation.

[0008] As a preferred solution of the utility model, a valve plate reinforcement ring is provided between the valve plate and the valve plate sealing ring, and the valve plate reinforcement ring is manufactured integrally with the valve plate. The valve plate reinforcement ring is provided to increase the contact area between the valve plate and the valve plate sealing ring, so that the valve plate sealing ring is not easily deflected, and the sealing strength is improved. The valve plate reinforcement ring is manufactured integrally with the valve plate, which can increase the strength of the valve plate and is not easily broken or damaged.

[0009] As a preferred solution of the present invention, the thickness of the valve plate reinforcement ring is greater than the thickness of the valve plate, which can increase the contact area between the valve plate and the valve plate sealing ring, making the valve plate sealing ring less likely to deflect, thereby improving the sealing strength and increasing the strength of the valve plate, making it less likely for the valve plate to break and be damaged.

[0010] As a preferred solution of the utility model, the sealing cover and the valve body are connected by seamless welding, and the sealing cover and the valve body can be seamlessly welded to ensure that dust does not overflow from the end of the valve stem.

[0011] As a preferred solution of the utility model, the connection between the valve stem and the valve plate is also provided with a fillet to reduce stress concentration, and the fillet is beneficial to improving stress distribution, reducing stress concentration, and enhancing the safety of parts.

[0012] As a preferred solution of the utility model, the valve plate sealing ring is made of silicone material. The silicone valve plate sealing ring has good softness and elasticity, and is resistant to high temperature and cold, so that the butterfly valve has good sealing performance for the closed pipeline.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. In order to avoid the failure of the sealing performance of the valve plate sealing ring, the valve stem sealing gasket and bearing are provided to provide radial support for the valve stem to prevent the valve stem from not being able to maintain alignment, causing the valve plate sealing ring to wear and seal failure; sealing parts are provided at both axial ends of the bearing to prevent the powder in the pipeline from entering the bearing and overflowing due to positive pressure, causing dust leakage, and improving the bearing sealing effect; by designing the chamfers of the bends or turns, the contact area of ​​the connection is increased, so that the dust will encounter more resistance and pressure loss when passing through the sealing channel, thereby improving the sealing strength of the valve stem, and preventing the powder from entering the gap between the valve stem and the valve plate sealing ring, causing the valve plate sealing ring to wear or jam the valve plate; the sealing treatment of the sealing cover can prevent the dust from overflowing to the outside of the valve body.

[0015] 2. Nylon washers have good toughness and strength. They can absorb and disperse radial forces through elastic deformation, thereby reducing the impact on rotating shafts and other mechanical parts. Nylon washer slots are conducive to positioning and fixing nylon washers, and can also improve the sealing effect. Felt rings have certain elasticity and compressibility, and can deform when subjected to force, thereby adapting to various sealing environments. They can also effectively reduce the impact and vibration of butterfly valves on bearings and protect sealing surfaces and bearings. Felt ring slots are conducive to positioning and fixing felt rings, and can also improve the sealing effect. Bearing slots are also conducive to positioning and fixing bearings to prevent bearings from shifting or shaking during operation.

[0016] 3. The valve plate reinforcement ring is set to increase the contact area between the valve plate and the valve plate sealing ring, so that the valve plate sealing ring is not easy to deflect and the sealing strength is improved. The valve plate reinforcement ring and the valve plate are manufactured as one piece, which can increase the strength of the valve plate and prevent the valve plate from being broken or damaged.

[0017] 4. The thickness of the valve plate reinforcement ring is greater than the thickness of the valve plate, which can increase the contact area between the valve plate and the valve plate sealing ring, making the valve plate sealing ring less likely to deflect, improving the sealing strength, and at the same time increasing the strength of the valve plate, making it less likely for the valve plate to break and be damaged.

[0018] 5. Seamless welding can be used between the sealing cover and the valve body to ensure that dust will not overflow from the end of the valve stem.

[0019] 6. The connection between the valve stem and the valve plate is also provided with a fillet to reduce stress concentration. The fillet is beneficial to improve stress distribution, reduce stress concentration and enhance the safety of parts.

[0020] 7. The valve plate sealing ring is made of silicone material. The silicone valve plate sealing ring has good softness and elasticity, and is resistant to high temperature and cold, which makes the butterfly valve close the pipeline with good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the valve stem and valve plate structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the valve body structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the valve plate of the utility model.

[0025] Markings in the figure: 1-valve body, 2-valve stem, 3-valve plate, 3.1-valve plate reinforcement ring, 3.2-valve plate sealing ring, 4-rounded corner, 5-chamfered corner, 6-nylon washer, 6.1-nylon washer slot, 7-felt ring, 7.1-felt ring slot, 8-bearing, 8.1-bearing slot, 9-sealing cover. DETAILED DESCRIPTION

[0026] The utility model is described in detail below in conjunction with the accompanying drawings.

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Example 1

[0028] like Figure 1-Figure 4 As shown, in this embodiment, a dust butterfly valve for zinc powder conveying pipeline and silo unloading includes a valve body 1, a valve stem 2 is arranged in the valve body 1, both ends of the valve stem 2 are provided with valve stem sealing washers and bearings 8 in turn, both axial ends of the bearing 8 are provided with sealing members, a valve plate 3 is arranged on the valve stem 2, a valve plate sealing ring 3.2 is arranged on the outer ring of the valve plate 3, a chamfer 5 for blocking dust is arranged at the connection between the valve stem 2 and the valve plate 3, and a sealing cover 9 is arranged on the valve body 1 to adapt to the end of the valve stem 2.

[0029] In order to avoid failure of the sealing performance of the valve plate sealing ring 3, a valve stem sealing gasket and a bearing 8 are provided to provide radial support for the valve stem to prevent the valve stem 2 from not being able to maintain alignment and causing the valve plate sealing ring 8 to wear and fail to seal; sealing members are provided at both axial ends of the bearing 8 to prevent powder in the pipeline from entering the bearing 8 and overflowing due to positive pressure, thereby improving the sealing effect of the bearing 8; by designing a curved or turning chamfer 5, the contact area of ​​the connection is increased, so that the dust will encounter more resistance and pressure loss when passing through the sealing channel, thereby improving the sealing strength of the valve stem 2, and preventing powder from entering the gap between the valve stem 2 and the valve plate sealing ring 3.2, thereby causing the valve plate sealing ring 3.2 to wear or jam the valve plate 3; the sealing treatment of the sealing cover 9 can prevent dust from overflowing outside the valve body 1. Example 2

[0030] like Figure 1-Figure 4 As shown, according to Example 1, a dust butterfly valve is used for zinc powder conveying pipeline and silo unloading, the valve stem sealing gasket is a nylon gasket 6, the valve body 1 is provided with a nylon gasket groove 6.1, the sealing member is a felt ring 7, the valve body 1 is provided with a felt ring groove 7.1, and the adapter bearing 8 on the valve body 1 is provided with a bearing groove 8.1.

[0031] The nylon washer 6 has good toughness and strength, and can absorb and disperse radial force through elastic deformation, thereby reducing the impact on the rotating shaft and other mechanical parts. The nylon washer groove 6.1 is conducive to positioning and fixing the nylon washer 6, and can also improve the sealing effect. The felt ring 7 has certain elasticity and compressibility, and can deform when subjected to force, so as to adapt to various sealing environments. It can also effectively reduce the impact and vibration of the butterfly valve on the bearing 8 and protect the sealing surface and the bearing 8. The felt ring groove 7.1 is conducive to positioning and fixing the felt ring 7, and can also improve the sealing effect. The bearing groove 8.1 is also conducive to positioning and fixing the bearing 8 to prevent the bearing 8 from shifting or shaking during operation. Example 3

[0032] like Figure 1-Figure 4 As shown, according to a dust butterfly valve for zinc powder conveying pipeline and silo unloading according to Example 2, a valve plate reinforcement ring 3.1 is provided between the valve plate 3 and the valve plate sealing ring 3.2, and the valve plate reinforcement ring 3.1 and the valve plate 3 are manufactured as one piece.

[0033] The valve plate reinforcement ring 3.1 is provided to increase the contact area between the valve plate 3 and the valve plate sealing ring 3.2, so that the valve plate sealing ring 3.2 is not easy to deflect, and the sealing strength is improved. The valve plate reinforcement ring 3.1 is manufactured integrally with the valve plate 3, which can increase the strength of the valve plate 3 and prevent the valve plate from being broken or damaged. Example 4

[0034] like Figure 1-Figure 4As shown, according to a dust butterfly valve for zinc powder conveying pipeline and silo unloading according to Example 3, the thickness of the valve plate reinforcement ring 3.1 is greater than the thickness of the valve plate 3, which can increase the contact area between the valve plate 3 and the valve plate sealing ring 3.2, so that the valve plate sealing ring 3.2 is not easy to deflect, the sealing strength is improved, and at the same time the strength of the valve plate 3 is increased, and the valve plate 3 is not easy to be broken or damaged. Example 5

[0035] like Figure 1-Figure 4 As shown, according to a dust butterfly valve for zinc powder conveying pipeline and silo unloading according to Example 4, the sealing cover 9 and the valve body 1 are connected by seamless welding to ensure that dust will not overflow from the end of the valve stem 2. Example 6

[0036] like Figure 1-Figure 4 As shown, according to Example 5, a dust butterfly valve for zinc powder conveying pipeline and silo unloading is provided with a fillet 4 for reducing stress concentration at the connection between the valve stem 2 and the valve plate 3. The fillet 4 is beneficial to improving stress distribution, reducing stress concentration and enhancing the safety of parts. Example 7

[0037] like Figure 1-Figure 4 As shown, according to Example 6, a dust butterfly valve for zinc powder conveying pipeline and silo unloading, the valve plate sealing ring 3.2 is made of silicone material. The silicone valve plate sealing ring 3.2 has good softness and elasticity, and is resistant to high temperature and cold, so that the butterfly valve has good sealing performance in the closed pipeline.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust butterfly valve for zinc powder conveying pipeline and silo unloading, comprising a valve body, wherein a valve stem is arranged in the valve body, characterized in that: Both ends of the valve stem are provided with valve stem sealing washers and bearings in turn, both axial ends of the bearing are provided with seals, the valve stem is provided with a valve plate, the outer ring of the valve plate is provided with a valve plate sealing ring, the connection between the valve stem and the valve plate is provided with a chamfer to block dust, and the valve body is provided with a sealing cover to adapt to the end of the valve stem.

2. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 1, characterized in that: The valve stem sealing gasket is a nylon gasket, the valve body is provided with a nylon gasket groove, the sealing element is a felt ring, the valve body is provided with a felt ring groove, and the adapter bearing on the valve body is provided with a bearing groove.

3. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 2, characterized in that: A valve plate reinforcement ring is arranged between the valve plate and the valve plate sealing ring, and the valve plate reinforcement ring and the valve plate are manufactured as one piece.

4. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 3, characterized in that: The thickness of the valve plate sealing ring and the valve plate reinforcement ring are both greater than the thickness of the valve plate.

5. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 4, characterized in that: The sealing cover and the valve body are connected by seamless welding.

6. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 5, characterized in that: The connection between the valve stem and the valve plate is also provided with a fillet to reduce stress concentration.

7. A dust butterfly valve for zinc powder conveying pipeline and silo unloading according to claim 6, characterized in that: The sealing ring is made of silicone material.

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