CN111750154A

CN111750154A - Butterfly valve body

Info

Publication number: CN111750154A
Application number: CN202010734474.4A
Authority: CN
Inventors: 王莹
Original assignee: Suzhou Guansu Electromechanical Equipment Co ltd
Current assignee: Suzhou Guansu Electromechanical Equipment Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-10-09

Abstract

The invention discloses a butterfly valve body, which comprises a valve body upper part, a valve cavity part and a valve body lower part which are arranged from top to bottom in sequence, the upper part and the lower part of the valve body are fixed by fasteners, a circular valve cavity for placing a valve plate is arranged in the valve cavity, the inner side surface of the round valve cavity is formed with an annular groove which can be detachably filled with an elastic sealing valve seat, an upper shaft hole channel communicated with the circular valve cavity is arranged in the center of the upper part of the valve body, a lower shaft hole channel communicated with the circular valve cavity is arranged in the center of the lower part of the valve body, the valve body is formed by butting two symmetrical 1/2 bodies, the tangent line of the valve body which is cut into two 1/2 bodies penetrates through the perpendicular bisectors of the upper shaft hole channel and the lower shaft hole channel, and the two 1/2 bodies are butted with the arc grooves arranged at the positions corresponding to the valve cavity parts to form the circular valve cavity; the valve body provided by the invention can realize automatic molding, not only improves the working efficiency, but also can reduce the material cost.

Description

Butterfly valve body

Technical Field

The invention relates to the technical field of valves, in particular to a butterfly valve body.

Background

The patent with the domestic patent number of CN 209587159U discloses a secondary sealing butterfly valve, wherein the valve body structure is an integral type or two-section type, the two-section type is an asymmetric structure, as is well known, the valve body material is generally cast iron/cast steel/stainless steel, secondary processing is needed on the basis of a blank, and the common processing of the inner contact surface is difficult to meet the sealing requirement; when the annular concave-convex clamping groove structure is designed in the middle of the inner cavity of the integrated valve body, the elastic sealing valve seat and the inner contact surface of the valve body are symmetrically designed in a convex-concave mode, the elastic sealing valve seat is manually twisted through manpower to be deformed so as to be embedded into the valve body, and the operation is difficult to achieve through automatic assembly.

The traditional two-axis design lower shaft needs to be additionally provided with a bottom supporting plate and accessories such as a matched seal and a bolt to realize a sealing function, the hidden danger of leakage exists, the cost is increased, the upper shaft needs to be provided with a limiting flange or a separation-preventing pin at the position of the valve shaft for preventing the upper shaft from falling off, and the material and the processing cost are correspondingly increased by the designs.

The split valve body disclosed in japanese patent No. JPA 1995098071 is assembled from two 1/2 bodies that are cut along a 180 ° center line, but has problems that automated assembly is impossible, production efficiency is low, and production cost is high.

Disclosure of Invention

The purpose of the invention is as follows: in order to solve the defects in the background technology, the invention discloses a butterfly valve body.

The technical scheme is as follows: a butterfly valve body comprises a valve body upper part, a valve cavity part and a valve body lower part which are arranged from top to bottom in sequence, the upper part and the lower part of the valve body are fixed by fasteners, a circular valve cavity for placing a valve plate is arranged in the valve cavity, the inner side surface of the round valve cavity is formed with an annular groove which can be detachably filled with an elastic sealing valve seat, an upper shaft hole channel communicated with the circular valve cavity is arranged in the center of the upper part of the valve body, a lower shaft hole channel communicated with the circular valve cavity is arranged in the center of the lower part of the valve body, the valve body is formed by butt joint of two symmetrical 1/2 bodies, the tangent line of the valve body which is divided into two 1/2 bodies penetrates through the perpendicular bisector of the upper shaft hole channel and the lower shaft hole channel, and the two 1/2 bodies are butted with the arc groove arranged at the position corresponding to the valve cavity part to form the circular valve cavity.

Furthermore, the upper shaft hole channel is connected with the valve shaft through a concave-convex structure.

Further, the inner contact surfaces of the upper portions of the valve bodies corresponding to the 1/2 main bodies are formed as convex and concave surfaces for coupling.

Further, the inner contact surfaces of the upper portions of the valve bodies corresponding to the 1/2 main bodies are joined to each other as flat surfaces.

Further, the upper axial bore passage is closed at one end relative to the valve chamber portion.

Further, the upper part and the lower part of the valve body are fixed through bolts.

Furthermore, the 1/2 body can be formed by two symmetrical 1/4 bodies in a butt joint mode, the tangent line that can divide the 1/2 body into two 1/4 bodies passes through the perpendicular bisector of the first shaft hole and the second shaft hole, and the circular valve cavity is formed after the four 1/4 bodies are in butt joint with the circular groove arranged at the position corresponding to the valve cavity portion.

Furthermore, the 1/2 body and the 1/4 body are integrally formed by resin, plastic or aluminum alloy.

The invention realizes the following beneficial effects:

1. the symmetrical multi-section valve body can meet the requirement only by an 1/2 body mould or a 1/4 body mould at most, and the manufacturing cost and the mould opening period are greatly reduced.

2. The valve body of the invention uses resin/plastic/aluminum alloy material, and can be directly used without processing basically; and the formed inner contact surface can directly meet the sealing requirement.

3. Compared with the traditional method that the annular groove which is used for detachably filling the elastic sealing valve seat is manually twisted to deform and can be embedded into the valve body, the method has the advantage that the operation is easy and the automatic assembly can be realized.

4. According to the invention, the limiting flange is directly formed on the valve body without additional design purchase, so that the production efficiency is improved, and the material cost is greatly reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a product disclosed by the invention.

Fig. 2 is a structural schematic diagram of two 1/2 bodies disclosed by the invention.

FIG. 3 is a schematic view of the connection structure between the upper part of the valve body and the valve shaft.

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.

Examples

Referring to fig. 1-3, a butterfly valve body comprises a valve body upper portion 20, a valve cavity portion 40 and a valve body lower portion 30 which are sequentially arranged from top to bottom, the valve body upper portion and the valve body lower portion are fixed through a fastener 50, a circular valve cavity for placing a valve plate is arranged in the valve cavity portion, an annular groove 90 for detachably filling an elastic sealing valve seat is formed in the inner side surface of the circular valve cavity, the circular valve cavity can be embedded into the valve body when the elastic sealing valve seat is distorted compared with a traditional manual mode, automatic assembly can be achieved easily, an upper shaft hole channel 100 communicated with the circular valve cavity is arranged in the center of the valve body upper portion and used for assembling an upper valve shaft 120 on the valve plate, a lower shaft hole channel 70 communicated with the circular valve cavity is arranged in the center of the valve body lower portion and used for installing a lower valve on the valve plate, the valve body 10 is formed by butt joint of two symmetrical 1/2 bodies 80, and the line, the circular valve chamber is formed after the circular arc groove that two 1/2 bodies set up corresponding valve chamber portion department docks, as long as 1/2 valve body mould just can satisfy the demand at most when producing, greatly reduced cost of manufacture and die sinking cycle.

In this embodiment, the upper shaft hole channel is connected with the valve shaft through the concave-convex structure 110, and when the valve shaft is used specifically, a groove or a bump can be designed on the outer surface of the valve shaft, and correspondingly, the bump or the groove is correspondingly arranged on the surface of the upper shaft hole channel, so that the groove can be matched with the bump in a concave-convex manner, and the phenomenon that the upper shaft falls off is prevented.

In this embodiment, the internal contact surface on the upper portion of the valve body corresponding to two 1/2 bodies is set as the convex-concave surface 60 for combination, and when in specific use, this convex surface can be provided with a positioning strip or a positioning column, and the concave surface is correspondingly set as a strip-shaped groove matched with the positioning strip or a positioning groove matched with the positioning column.

In this embodiment, the inner contact surfaces of the upper portions of the valve bodies corresponding to the two 1/2 main bodies are joined to each other as flat surfaces.

In this embodiment, the lower shaft hole passageway is closed relative to the one end of valve chamber portion, compares in the closed mode among the prior art, need not extra design purchase, when improving production efficiency, has also reduced material cost by a wide margin.

In this embodiment, valve body upper portion and valve body lower part are all through the bolt fastening, and this kind of fixed mode cost is lower relatively, and makes things convenient for artifical the dismantlement.

In this embodiment, the 1/2 body can be formed by two symmetrical 1/4 bodies butt joint, can pass the perpendicular bisector of shaft hole one and shaft hole two with the tangent line that 1/2 body cut into two 1/4 bodies, and the circular valve pocket is formed after the circular arc groove butt joint that four 1/4 bodies set up corresponding valve chamber portion department, as long as 1/4 valve body mould also can satisfy the demand when producing, greatly reduced cost of manufacture and die sinking cycle.

In this embodiment, the 1/2 body and the 1/4 body are integrally formed by resin, plastic or aluminum alloy, and can be used directly without any processing; and the formed inner contact surface can directly meet the sealing requirement.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A butterfly valve body comprises a valve body upper part, a valve cavity part and a valve body lower part which are arranged from top to bottom in sequence, the upper part and the lower part of the valve body are fixed by fasteners, a circular valve cavity for placing a valve plate is arranged in the valve cavity, the inner side surface of the round valve cavity is formed with an annular groove which can be detachably filled with an elastic sealing valve seat, an upper shaft hole channel communicated with the circular valve cavity is arranged in the center of the upper part of the valve body, a lower shaft hole channel communicated with the circular valve cavity is arranged in the center of the lower part of the valve body, the valve body is characterized in that the valve body is formed by butting two symmetrical 1/2 bodies, the tangent line of the valve body which is divided into two 1/2 bodies penetrates through the perpendicular bisector of the upper shaft hole channel and the lower shaft hole channel, and the two 1/2 bodies are butted with arc grooves arranged at the positions corresponding to the valve cavity parts to form the circular valve cavity.

2. The butterfly valve body of claim 1, wherein the upper axial bore passage is coupled to the valve shaft by a male-female connection.

3. The butterfly valve body of claim 1, wherein the inner contact surfaces of the upper portions of the valve body corresponding to the two 1/2 bodies are configured as a convex-concave surface for engagement.

4. The butterfly valve body of claim 1, wherein the inner contact surfaces of the upper portions of the valve body corresponding to the 1/2 bodies are flat surfaces for joining.

5. The butterfly valve body of claim 1, wherein the lower axial bore passage is closed at an end opposite the valve chamber portion.

6. The butterfly valve body of claim 1, wherein the upper body portion and the lower body portion are each bolted together.

7. The butterfly valve body of claim 1, wherein the 1/2 body is formed by two symmetrical 1/4 bodies that are butted together, a tangent line that divides the 1/2 body into two 1/4 bodies passes through a perpendicular bisector of the first and second shaft holes, and four circular grooves formed on the 1/4 bodies corresponding to the valve cavity are butted together to form the circular valve cavity.

8. The butterfly valve body of claim 7, wherein the 1/2 body and the 1/4 body are each molded from a resin, plastic, or aluminum alloy.