CN116081312A

CN116081312A - Rotary valve

Info

Publication number: CN116081312A
Application number: CN202210419698.5A
Authority: CN
Inventors: 周娩红
Original assignee: Hunan Exploration Machinery Technology Co ltd
Current assignee: Hunan Exploration Machinery Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-05-09

Abstract

The rotary valve comprises a rotor, a valve body and an end cover, wherein the rotor is provided with a rotating shaft, rotor blades and a rotor end plate, the rotary valve is characterized in that the rotating shaft is provided with a rectangular shaft section which is used for detachably connecting the rotor blades, the rotor blades and the rotor end plate are made of nonmetallic materials, the inner face of the valve body is detachably connected with a nonmetallic lining sleeve, and the inner face of the end cover is detachably connected with a nonmetallic end cover lining plate. The rotary valve of the invention has the advantages of no metal pollution to materials, high product percent of pass, simple production process, low cost, easy maintenance, no need of returning to factories for maintenance, and time saving, and can be replaced at any time on site.

Description

Rotary valve

Technical Field

The invention belongs to a continuous feeder, and particularly relates to a rotary valve.

Background

The rotary valve is a continuous feeder, also called air locking valve, star-shaped discharge valve, air seal, etc., and is commonly used in pneumatic conveying systems for powder and granular materials. The core principle of the pneumatic conveying system is to use the pressure difference between the upstream and downstream devices for conveying. The rotary valve has the advantages of simple structure, convenient maintenance, good sealing performance, continuous quantitative feeding and wide application in pneumatic conveying systems, and is used as typical equipment in pneumatic conveying. In particular to continuous feeding when pressure difference exists between upstream and downstream equipment in a pneumatic conveying system, such as between a storage bin and a pneumatic conveying pipeline, which plays a role in maintaining the pressure difference. Both negative pressure and positive pressure delivery systems are used.

However, the disadvantage of rotary valves is also evident, since the rotary structure is used inside, there must be a gap between the inside of the rotary valve. Because of the gap, the conveyed material can enter the gap to generate accumulated material. And because the rotary valve needs to keep rotating continuously, the accumulated materials and the inner part of the rotary valve are inevitably worn, the internal clearance is directly increased, and the service life of the rotary valve is influenced. Particularly on both sides of the gap, wear is most severe.

Meanwhile, if the contact part of the rotary valve and the material is not coated, the metal is in direct contact with the material. Under the action of abrasion, the material will inevitably come out of the metallic impurities. This is not allowed in the production of raw materials in the lithium battery industry, such as ternary materials, lithium iron phosphate. If the interior of the rotary valve is sprayed with a coating, metal impurities can also appear in the material after the coating is worn. The coating needs to be repaired at this time, and the wear-resistant coating in the lithium battery industry generally uses ceramic and tungsten carbide coatings, and the use of the coating and the repair coating have high cost and long production and repair time. Therefore, a new rotary valve needs to be developed, which is applied to industries requiring nonmetallic materials in contact with materials.

Disclosure of Invention

The invention aims to provide a rotary valve with low cost, wherein materials are not polluted by metal.

The rotary valve comprises a rotor, a valve body and an end cover, wherein the rotor is provided with a rotating shaft, rotor blades and a rotor end plate, the rotating shaft is provided with a rectangular shaft section for detachably connecting the rotor blades, the rotor blades and the rotor end plate are made of nonmetallic materials, the inner face of the valve body is detachably connected with a nonmetallic lining sleeve, and the inner face of the end cover is detachably connected with a nonmetallic end cover lining plate.

Preferably, the rotor blade is divided into at least 2 sections in the axial direction, and the sections are connected by through connection bolts. And the rotor blades of each section are sealed by a sealing ring or simultaneously sealed by a sealing ring and sealing glue.

The nonmetallic lining is fixed on the inner face of the valve body through bolts. The nonmetallic lining is sealed with the inner face of the valve body by a sealing ring or simultaneously sealed by a sealing ring and sealing glue. The nonmetallic end cover lining plate is fixed on the inner face of the end cover through bolts. The non-metal end cover lining plate and the inner surface of the end cover are sealed by a sealing ring or simultaneously sealed by a sealing ring and sealing glue. And the rotor blade and the rotating shaft are sealed by sealant.

The two ends of the bolt are provided with nonmetallic rotor patches.

The nonmetallic materials adopted by the rotor blade, the rotor end plate, the nonmetallic lining and the nonmetallic end cover lining plate are plastics or ceramics or plastic glass fiber composite materials or ceramic glass fiber composite materials or plastic carbon fiber composite materials or carbon ∈ -

Carbon composites or ceramic carbon fiber composites.

According to the technical scheme, the whole inner cavity of the rotary valve is a nonmetal inner cavity, nonmetal components are detachable components, and the rotary valve has the direct advantages that materials are free of metal pollution, and the qualification rate of products is high; secondly, the cost of the rotary valve is reduced, the production process is simple, the maintenance is easy, the maintenance of returning to factories is not needed, the rotary valve can be replaced at any time on site, and the time is saved.

Drawings

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

Fig. 2 is a cross-sectional view taken along line A-A of fig. 1.

Fig. 3 is a schematic structural view of the rotor.

Fig. 4 is an axial cross-sectional view of fig. 3.

Fig. 5 is a schematic structural view of the end cap.

Fig. 6 is another embodiment for the structure of fig. 5.

Reference numerals:

the rotor comprises an end cover 1, a valve body 2, a rotor 3, a driving part 4, a bearing 11, a sealing structure 12, a nonmetallic end cover lining 13, a nonmetallic liner 21, a rotating shaft 31, rotor blades 32, a rotor end plate 33, a rotor patch 34, a through connecting bolt 35 and a sealing ring 36.

Detailed Description

The invention comprises an end cover 1, a valve body 2, a rotor 3, a driving part 4, a bearing 11, a sealing structure 12, a nonmetallic end cover lining plate 13, a nonmetallic liner 21, a rotating shaft 31, rotor blades 32, a rotor end plate 33 and a rotor patch 34. The present invention will be described in detail with reference to the following specific embodiments.

As can be seen from fig. 1, the present invention has an end cap 1, a valve body 2, a rotor 3, and a driving portion 4, wherein the rotor 3 is installed in the valve body 2 with a gap from the inner wall of the valve body 2. A sealing structure 12 and a bearing 11 are arranged in the end cover 1. The end cap 1 and the rotor 3 are fixedly connected through a bearing 11 and axially sealed through a sealing structure 12. The end cap 1 is mounted on the valve body 2 by bolts. The driving portion 4 is mounted on the end cover 1 by bolts for driving the rotor 3.

As can be further seen in connection with fig. 2, the valve body 2 is provided with a non-metallic bushing 21, which is bolted between them. The nonmetallic liner 21 is made of nonmetallic materials such as plastics or ceramics or fiber reinforced materials such as plastic glass fiber composite materials, ceramic glass fiber composite materials and plastic carbon fiber composite materials. When the nonmetallic liner 21 is worn out to increase the clearance wear between the nonmetallic liner 21 and the rotor 3, the nonmetallic liner 21 can be directly removed and replaced.

Fig. 3 and 4 reflect the structure of the rotor, and the rotor 3 is composed of a rotating shaft 31, rotor blades 32, a rotor end plate 33, and a rotor patch 34. The rotary shaft 31 has a rectangular shaft section, the rotor blades 32 have rectangular mounting holes, and the rotor blades 32 are detachably mounted on the rectangular shaft section of the rotary shaft 31. As another embodiment of the present invention, the rotor blade is at least divided into 2 sections in the axial direction, the sections are connected by through connection bolts 35 and sealed by sealing rings 36, such as O-rings, or both sealing glue and sealing rings, or the rotor blade 32, the rotor end plate 33 and the rotor patch 34 can be respectively connected in series with the rotating shaft by the through connection bolts 35 and sealed by the sealing rings or/and the sealing glue, and finally the rotor blade 32, the rotor end plate 33 and the rotor patch 34 are connected with the rotating shaft 31 in a sealing manner to form an integral rotor 3.

Rotor blades 32, rotor end plates 33, rotor patches 34 are made of non-metallic materials, such as plastics or ceramics or fiber reinforced materials, such as plastic glass fiber composites, ceramic glass fiber composites, plastic carbon fiber composites.

Another embodiment of the rotor blade 32 is that the rotor blade may be made in one piece, which is relatively simple to manufacture in relation to the above described segments, but the entire rotor blade has to be replaced when the rotor blade is severely worn somewhere.

When any part of the rotor blade 32, the rotor end plate 33 and the rotor patch 34 is worn out, the clearance between the rotor and the valve body or the end cover is increased, and the corresponding replacement can be performed.

As can be seen from fig. 1 and 5, the inner face of the end cap 1 is provided with a non-metallic end cap liner 13, which is threaded therebetween. Fig. 5 and 6 show two embodiments of the threaded connection between the end cap 1 and the non-metallic end cap liner 13, respectively. The non-metallic end cap liner 13 is made of a non-metallic material such as plastic or ceramic or fiber reinforced material such as plastic glass fiber composite, ceramic glass fiber composite, plastic carbon fiber composite.

The non-metallic end liner 13 may be replaced directly as the non-metallic end liner 13 wears out increasing the end plate to rotor end gap.

In normal operation, the drive part 4 drives the rotor 3 to rotate via the spindle 31. In the case of belt feed, material will enter the gap between the non-metallic end cap liner 13 on the end cap 1 and the rotor end plate 33 and rotor patch 34 of the rotor 3 and the gap between the non-metallic liner 21 on the valve body 2 and the rotor blades 32 and rotor end plate 33 of the rotor 3, causing wear to the relevant components. And after the wear of the nonmetallic part reaches a certain value, stopping the machine to quickly replace the worn part. Compared with the existing rotary valve with the nonmetallic coating sprayed inside, the rotary valve reduces the operation cost and improves the production efficiency.

During maintenance, the machine is stopped firstly, the driving part 4 is detached from the end cover 1 in sequence, the end cover 1 and the rotor 3 are detached from the valve body 2, and finally nonmetallic parts and other parts which need maintenance are detached respectively.

The foregoing is only a few embodiments of the present invention, and the specific embodiments may be determined as practical needed within the knowledge of those skilled in the art.

Claims

1. The rotary valve comprises a rotor, a valve body and an end cover, wherein the rotor is provided with a rotating shaft, rotor blades and a rotor end plate, the rotary valve is characterized in that the rotating shaft is provided with a rectangular shaft section which is used for detachably connecting the rotor blades, the rotor blades and the rotor end plate are made of nonmetallic materials, the inner face of the valve body is detachably connected with a nonmetallic lining sleeve, and the inner face of the end cover is detachably connected with a nonmetallic end cover lining plate.

2. Rotary valve according to claim 1, characterized in that the rotor blade is divided into at least 2 sections in the axial direction, the sections being connected by means of through-connection bolts.

3. The rotary valve of claim 1 wherein the nonmetallic liner is bolted to the inner face of the valve body.

4. The rotary valve of claim 1 wherein the non-metallic end cap liner is bolted to the inner face of the end cap.

5. The rotary valve of claim 2 wherein the bolt has non-metallic rotor patches at both ends.

6. The rotary valve of claim 1 wherein the rotor blade is sealed to the shaft with a sealant.

7. Rotary valve according to claim 2, characterized in that between the rotor blades of each segment are sealed with sealing rings or with both sealing rings and sealing glue.

8. A rotary valve according to claim 3, wherein the non-metallic bushing is sealed to the inner face of the valve body with a sealing ring or with both a sealing ring and a sealant.

9. The rotary valve of claim 4 wherein the non-metallic end liner is sealed to the inner face of the end cap with a seal ring or both a seal ring and a sealant.

10. Rotary valve according to one of claims 1 to 9, characterized in that the non-metallic material used in the rotor blades, rotor end plates, non-metallic bushings and non-metallic end cap liners is plastic or ceramic or plastic glass fiber composite or ceramic glass fiber composite or plastic carbon fiber composite or carbon/carbon composite or ceramic carbon fiber composite.