CN210438071U

CN210438071U - Bidirectional sealing rotary valve

Info

Publication number: CN210438071U
Application number: CN201920811652.1U
Authority: CN
Inventors: 朱国强; 王国成; 王国兴; 孙晓阳
Original assignee: Tianjin Shuangxingda Environmental Protection Conveying Machinery Co ltd
Current assignee: Tianjin Shuangxingda Environmental Protection Conveying Machinery Co ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-05-01
Anticipated expiration: 2029-05-31

Abstract

The utility model provides a two-way sealed rotary valve, which comprises a valve body, valve covers symmetrically arranged on the upper side and the lower side of the valve body, and a rotating shaft vertically arranged on the valve covers, wherein one end of the rotating shaft extending into the valve body is provided with a rocker arm, and the other end is provided with a driving mechanism for driving the rotating shaft to rotate; the valve mechanism is arranged on the rocker arm, the purging mechanism is arranged on the valve body corresponding to the rocker arm, and the valve mechanism comprises two valve discs coaxially arranged on the upper side and the lower side of the rocker arm. The utility model has the advantages of simple structure, high reliability, strong applicability, longer service life, and good applicability for various dust particle environments, and realizes the two-way sealing in the valve body by arranging two valve discs, thereby ensuring that the medium can not form inner leakage in the valve body; the sweeping assembly arranged on the valve body can effectively remove dust in the valve body, the maintenance difficulty of the rotary valve is reduced, and the reliability of the rotary valve is improved.

Description

Bidirectional sealing rotary valve

Technical Field

The invention belongs to the field of special valves, and particularly relates to a rotary valve with bidirectional sealing.

Background

At present, special valves need to be used in the environment of dust particles, such as pneumatic conveying of fly ash in a thermal power plant, ash unloading in an ash storehouse, cement conveying in a cement plant and the like, and the special valves suitable for the dust particles are of the types of gate valves, dome valves, double-gate valves, rotary valves and the like, but the existing various valves have respective technical defects: firstly, the sealing is not tight, the valve is easy to leak ash, the external leakage affects the environment, and the internal leakage affects the production; secondly, the sealing ring has short service life and complex control; thirdly, dust is accumulated in the valve, so that the valve is blocked; fourthly, the valve can only be sealed in one way and cannot be applied to occasions with pressure change at two ends of the valve.

Disclosure of Invention

In view of the above, the present invention is directed to overcome the above-mentioned drawbacks of the prior art and to provide a rotary valve with a bidirectional seal.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a bidirectional sealing rotary valve comprises a valve body, valve covers symmetrically arranged on the upper side and the lower side of the valve body, and a rotating shaft vertically arranged on the valve covers, wherein a rocker arm is arranged at one end of the rotating shaft extending into the valve body, and a driving mechanism for driving the rotating shaft to rotate is arranged at the other end of the rotating shaft; the valve mechanism comprises two valve discs coaxially arranged at the upper side and the lower side of the rocker arm, each valve disc is arranged corresponding to the air passing hole of the valve cover, and a grinding sealing assembly is arranged on one side, facing the valve cover, of each valve disc; the purging mechanism comprises a gas nozzle arranged in the valve body, one end of the gas nozzle, which extends out of the valve body, is connected with gas supply equipment through a gas inlet pipeline, and a check valve is arranged on the gas inlet pipeline.

Further, the rotating shaft is rotatably installed on the valve cover through a self-lubricating bearing, and the rotating shaft and the valve cover are sealed through a plurality of sealing packing.

Further, the gas nozzle adopts an air atomization nozzle or a fan-shaped nozzle.

Furthermore, the grinding seal assembly comprises a grinding gasket arranged on the valve disc, the valve disc is vertically and slidably mounted on the rocker arm, an elastic element is arranged between the valve disc and the rocker arm, one end of the elastic element abuts against the rocker arm, and the other end of the elastic element abuts against the valve disc.

Furthermore, the grinding gasket is made of wear-resistant materials such as wear-resistant ceramics or hard alloy.

Furthermore, square connecting portions are arranged at two ends of the rotating shaft, mounting holes matched with the connecting portions are formed in the rocker arms, pressing plates used for fixing the rocker arms are arranged on the connecting portions, and the pressing plates are fixed on the rotating shaft through screws.

Furthermore, the joint of the valve body and the valve cover is sealed by an O-shaped sealing ring.

Compared with the prior art, the invention has the following advantages:

the invention has the advantages of simple structure, high reliability, strong applicability, longer service life, and good suitability for various dust particle environments, realizes two-way sealing in the valve body by arranging the two valve discs, and ensures that the medium cannot form inner leakage in the valve body; the purging assembly arranged on the valve body can effectively remove dust in the valve body, so that the maintenance difficulty of the rotary valve is reduced, and the reliability of the rotary valve is improved; the grinding seal assembly arranged on the valve disc further improves the service life and the sealing effect of the valve disc, a unique grinding effect can be formed on the grinding gasket along with the use of the rotary valve, the abrasion loss of the grinding gasket can be automatically compensated through the pressure of the elastic element, the better the sealing performance of the grinding gasket is, and the sealing performance of the valve disc is greatly improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

fig. 1 is a schematic structural diagram of the invention.

Description of reference numerals:

1-driving a cylinder; 2-a connecting rod; 3-valve cover; 4-a valve body; 5-a rotating shaft; 6-self-lubricating bearings; 7-sealing packing; 8-rocker arm; 9-grinding the gasket; 10-a valve disc; 11-a resilient element; 12-O-ring seals; 13-a check valve; 14-a gas nozzle; 15-air passing holes; 16-a platen; 17-screw.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A bidirectional sealing rotary valve is shown in figure 1 and comprises a valve body 4, valve covers 3 symmetrically arranged on the upper side and the lower side of the valve body 4, and a rotating shaft 5 vertically arranged on the valve covers 3, wherein one end, extending into the valve body 4, of the rotating shaft 5 is provided with a rocker arm 8, and the other end of the rotating shaft is provided with a driving mechanism for driving the rotating shaft 5 to rotate; the valve mechanism comprises two valve discs 10 coaxially arranged at the upper side and the lower side of the rocker arm 8, each valve disc 10 is arranged corresponding to the air passing hole 15 of the valve cover 3, and a grinding sealing assembly is arranged on one side of each valve disc 10, which faces the valve cover; the purging mechanism comprises a gas nozzle 14 arranged in the valve body, one end, extending out of the valve body, of the gas nozzle 14 is connected with gas supply equipment through a gas inlet pipeline, a check valve 13 is arranged on the gas inlet pipeline, and the gas inlet pipeline can adopt an existing high-pressure gas pipe.

The valve body 4 is sealed through O type sealing washer 12 with valve gap 3 junction, and O type sealing washer 12 can effectively avoid the sealed condition emergence of leaking easily that brings of overhauing inconvenient and sealed pad that brings of gluing of conventional.

The rotating shaft 5 is rotatably installed on the valve cover through the self-lubricating bearing 6, oil lubrication is not needed, the rotating shaft and the valve cover are not interfered with each other, the rotary valve is suitable for long-term operation under severe working conditions, and the service life of the rotary valve is prolonged; the rotating shaft and the valve cover are sealed through the multi-channel sealing packing 7, so that the leakage can be effectively avoided, and the sealing performance of the rotating valve is improved.

The gas nozzle 14 adopts an air atomizing nozzle or a fan-shaped nozzle, and the check valve 13 is arranged, so that the dust-containing gas in the valve body can be prevented from polluting the gas supply equipment when the internal pressure of the valve body is higher than the gas supply pressure of the gas supply equipment, the control valve or the gas supply equipment is prevented from being damaged, and the reliability of the rotary valve is greatly improved; meanwhile, by adopting the atomizing nozzle, the air entering the valve body through the atomizing nozzle can be dispersed for dust removal, the dust removal area of the air is increased, and the dust removal effect of the gas nozzle is greatly improved;

the gas nozzle 14 can also reduce the maintenance cost of the rotary valve, workers do not need to disassemble the rotary valve during cleaning, the maintenance difficulty of the rotary valve is greatly reduced, and the atomizing nozzle can also avoid cluster air from directly entering the valve body, so that the cluster air is prevented from damaging equipment in the valve body, and the reliability of the rotary valve is further improved.

The grinding seal assembly comprises a grinding gasket 9 arranged on a valve disc 10, the valve disc 10 is vertically and slidably mounted on a rocker arm 8, an elastic element 11 is arranged between the valve disc and the rocker arm, one end of the elastic element 11 props against the rocker arm, the other end of the elastic element props against the valve disc, specifically, a sliding groove is vertically arranged on the valve disc, a sliding part in sliding fit with the sliding groove is arranged on the rocker arm, the elastic element 11 is arranged on the sliding part, and an elastic selection piece can adopt a compression spring or a disc spring as long as the elastic selection piece can prop against the valve disc, so that the valve disc is tightly;

the grinding gasket 9 is made of wear-resistant materials such as wear-resistant ceramics or hard alloy; through setting up grinding gasket 9 and elastic element 11, can be in close contact with all the time between valve disc and the valve gap, avoid debris to get into the contact surface, ensure that the sealing performance of valve disc is intact all the time, relative motion can form unique grinding action to grinding gasket between valve disc and the valve gap, grinding gasket's wearing and tearing volume can also carry out automatic compensation through elastic element's pressure, the sealing performance who uses grinding gasket more is better, has improved the sealing performance of valve disc greatly.

The both ends of pivot 5 are equipped with square connecting portion, be equipped with on the rocking arm with connecting portion complex mounting hole, be equipped with the clamp plate 16 that is used for fixed rocking arm on the connecting portion, this clamp plate 16 passes through screw 17 to be fixed in the pivot, and is concrete, pivot 5 sets up on the valve gap 3 of upside, and the drive rocking arm that square connecting portion can be fine rotates, and clamp plate 16 then can avoid rocking arm and pivot separation, with adopting no key, no pin joint between pivot and the rocking arm, need not alignment and positioning accuracy height during the installation, and it is very convenient to install, has improved the convenience of this kind of rotary valve cartridge greatly, is favorable to improving the maintainability of rotary valve, reduces workman's intensity of labour.

The driving mechanism comprises a connecting rod 2 and a driving cylinder 1 for driving the connecting rod 2 to move, the driving mechanism can be replaced by a driving motor or a manual rotating wheel, only the rotation of the driving rotating shaft can be realized, two valve discs can be driven to move simultaneously through one driving device, the opening synchronism of the valve discs is greatly improved, and therefore the applicability of the rotary valve is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. A rotary valve sealed in both directions, comprising: the valve comprises a valve body, valve covers symmetrically arranged on the upper side and the lower side of the valve body, and a rotating shaft vertically arranged on the valve covers, wherein a rocker arm is arranged at one end of the rotating shaft extending into the valve body, and a driving mechanism for driving the rotating shaft to rotate is arranged at the other end of the rotating shaft; the valve mechanism comprises two valve discs coaxially arranged at the upper side and the lower side of the rocker arm, each valve disc is arranged corresponding to the air passing hole of the valve cover, and a grinding sealing assembly is arranged on one side, facing the valve cover, of each valve disc; the purging mechanism comprises a gas nozzle arranged in the valve body, one end of the gas nozzle, which extends out of the valve body, is connected with gas supply equipment through a gas inlet pipeline, and a check valve is arranged on the gas inlet pipeline.

2. A bi-directional sealed rotary valve as set forth in claim 1 wherein: the rotating shaft is rotatably installed on the valve cover through a self-lubricating bearing, and the rotating shaft and the valve cover are sealed through a plurality of sealing packing.

3. A bi-directional sealed rotary valve as set forth in claim 1 wherein: the gas nozzle adopts an air atomization nozzle or a fan-shaped nozzle.

4. A bi-directional sealed rotary valve as set forth in claim 1 wherein: the grinding seal assembly comprises a grinding gasket arranged on a valve disc, the valve disc is vertically and slidably mounted on the rocker arm, an elastic element is arranged between the valve disc and the rocker arm, one end of the elastic element abuts against the rocker arm, and the other end of the elastic element abuts against the valve disc.

5. A bi-directional sealed rotary valve as set forth in claim 4 wherein: the grinding gasket is made of wear-resistant ceramic or hard alloy.

6. A bi-directional sealed rotary valve as set forth in claim 1 wherein: the swing arm is provided with a mounting hole matched with the connecting part, the connecting part is provided with a pressing plate used for fixing the swing arm, and the pressing plate is fixed on the rotating shaft through screws.

7. A bi-directional sealed rotary valve as set forth in claim 1 wherein: the joint of the valve body and the valve cover is sealed by an O-shaped sealing ring.