1. The utility model provides an eight lead to butterfly valve that commutates, includes valve body, lower valve body, valve shaft, its characterized in that, be equipped with four openings and four disk seats on last valve body, the lower valve body respectively, go up the valve body and be equipped with the baffle down between the valve, go up the valve body, be equipped with the valve plate in the lower valve body respectively, the valve shaft passes upper end cover, the interior valve plate of valve plate, baffle, the lower valve body of last valve respectively, the lower extreme and the lower end cover of valve shaft are connected, and the valve shaft all has the sealing member with upper end cover, baffle, lower end cover contact department, and the upper end and the drive arrangement of valve shaft are connected.

2. The eight-way reversing butterfly valve of claim 1, wherein the valve seat is an eccentric structure.

3. The eight-way reversing butterfly valve of claim 2, wherein a surface of the spacer comprises a wear resistant material.

4. An eight-way reversing butterfly valve according to claim 3, wherein said valve plate is of a straight plate construction.

Background

In order to improve the utilization ratio of resources, the enterprise increases the waste heat utilization device, carries out abundant heat exchange with high temperature flue gas and cold air, then carries out the reutilization with hot air to reduce high temperature flue gas temperature, reduce the heat and discharge, in order to guarantee thermal continuous utilization, need increase a switching-over valve, improve the efficiency of utilizing.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a universal tool for machining an eccentric adjustable butterfly valve.

The invention has the technical scheme that the eight-way reversing butterfly valve comprises an upper valve body, a lower valve body and a valve shaft, wherein four openings and four valve seats are respectively arranged on the upper valve body and the lower valve body, a partition plate is arranged between the upper valve body and the lower valve body, valve plates are respectively arranged in the upper valve body and the lower valve body, the valve shaft respectively penetrates through an upper end cover, the valve plates in the upper valve body, the partition plate and the valve plates in the lower valve body, the lower end of the valve shaft is connected with a lower end cover, sealing elements are arranged at the contact positions of the valve shaft, the upper end cover, the partition plate and the lower end cover, and the upper end of the valve shaft is connected with a driving device.

Preferably, the valve seat is of eccentric construction.

Preferably, the surface of the partition has a wear resistant material.

Preferably, the valve plate is of a straight plate type structure.

The invention has the advantages that the four-way gas operation is realized simultaneously, and the reliable sealing performance can be realized after the valve is closed, so that the gas leakage between two ways of media is prevented.

Drawings

FIG. 1 is a schematic view of the present invention; fig. 2 is a sectional view taken at the point C-C in fig. 1.

In the figure: 1. a drive device; 2. a valve shaft; 3. an upper end cover; 4. an upper valve body; 5. a partition plate; 6. a lower valve body; 7. a valve plate; 8. a lower end cover; 9. a valve seat.

Detailed Description

As shown in the figure, an eight-way reversing butterfly valve comprises an upper valve body 4, a lower valve body 6 and a valve shaft 2, wherein the upper valve body 4 and the lower valve body 6 are respectively provided with four through holes and four valve seats 9, the valve seats 9 are of an eccentric structure, the valve seats 9 are matched with the sealing surfaces of valve plates 7, a certain sealing specific pressure is formed by the torque of a driving device 1, the sealing performance of the sealing surfaces is ensured, a partition plate 5 is arranged between the upper valve body 4 and the lower valve 6, the surface of the partition plate 5 is provided with wear-resistant materials, the sealing reliability after long-time opening and closing is ensured, the valve plates 7 are respectively arranged in the upper valve body 4 and the lower valve body 6, the valve shaft 2 respectively penetrates through an upper end cover 3, the valve plates 7 in the upper valve body, the partition plate 5 and the valve plates 7 in the lower valve body, the lower end of the valve shaft 2 is connected with a lower end cover 8, the contact parts of the valve shaft 2, the upper end cover 3, the partition plate 5 and the lower end cover 8 are respectively provided with sealing elements, the upper end of the valve shaft 2 is connected with the driving device 1, the valve plate 7 is of a straight plate type structure, so that the flow resistance is reduced, the size of the valve is minimum and the friction resistance is minimum under the condition of ensuring the flow.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.