CN210623591U

CN210623591U - Butterfly valve

Info

Publication number: CN210623591U
Application number: CN201921232354.3U
Authority: CN
Inventors: 陈力; 冯劲松; 吴春景
Original assignee: Hubei Xinye Thermal Energy Engineering Co Ltd
Current assignee: Hubei Xinye Thermal Energy Engineering Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-05-26
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a butterfly valve, include: the valve comprises a valve body, two bearings, a valve shaft, a shaft sleeve and a butterfly plate, wherein two mounting holes which are symmetrically arranged relative to the central axis of the valve body are formed in the side wall of the valve body, the two bearings are fixed on the outer wall of the valve body and coaxially arranged in the mounting holes in a one-to-one correspondence mode, the valve shaft is partially arranged in the valve body, two ends of the valve body sequentially penetrate through the mounting holes and the bearings respectively, the bearing inner rings are connected, the valve body is coaxially and detachably sleeved in the shaft sleeve, the valve shaft is arranged in the shaft sleeve, the outer edge of the butterfly plate is matched with the inner wall of the valve body, and one side. The utility model has the advantages that: the structure of valve shaft is established to the adoption axle sleeve cover not only makes the valve shaft not direct and the fluid medium direct contact in the pipeline, improves the valve shaft durability, has also strengthened the wholeness of valve shaft moreover, makes its non-deformable, and in addition, still greatly reduced the assembly degree of difficulty of butterfly valve, saved the human cost.

Description

Butterfly valve

Technical Field

The utility model belongs to the technical field of the governing valve and specifically relates to a butterfly valve is related to.

Background

The butterfly valve is one of the most used devices in industrial production, is widely applied to various air ducts, and is an important participating element of an industrial production control system. The rotating part is an important part of the butterfly valve and determines whether the whole equipment can normally and reliably operate. For many years, the rotary part of butterfly valves has been essentially constructed using a combination of a valve shaft and a sleeve, wherein the hidden drawbacks have been overlooked for a long time. Because the valve shaft and the shaft sleeve are in sliding friction, when the valve shaft rotates, the contact surface of the valve shaft and the shaft sleeve is abraded, if the finish of a machining surface in the manufacturing process is not enough or the coaxiality of the valve shaft and the shaft sleeve in the assembling process is not enough, the abrasion speed is accelerated, the service life is long, the matching between the valve shaft and the shaft sleeve is damaged and becomes loose, and therefore the rotation is not flexible and the rotation torque is increased. Moreover, the valve shaft and sleeve arrangements are poorly replaceable and repairable, and the equipment is often forced to perform ill-working. In addition, when the working medium of the valve contains dust or corrosive components, the service life of the valve shaft and the shaft sleeve is shorter, and the loss caused to users is further increased.

In recent years, a structure in which a plurality of bearings are combined with a valve shaft has been proposed as a rotating member, and it is particularly preferable to use two bearings. This improvement reduces the force of the bearing on the valve body. However, the valve shaft in the scheme is not designed integrally, but is divided into two sections which are respectively arranged on two sides of the butterfly plate, the design scheme reduces the integrity of the valve shaft, so that the valve shaft is easy to deform and the service life of the valve shaft is reduced, and meanwhile, the butterfly valve in the design scheme is complex in assembly process and poor in maintainability; in addition, in this technical scheme, the valve shaft can directly contact with the fluid medium in the pipeline, if the fluid medium has the corrosivity, can shorten the life of valve shaft greatly.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a butterfly valve that improves the integrity of the valve shaft of the bearing assembly rotary butterfly valve, reduces the difficulty of assembly, and improves durability.

A butterfly valve, comprising: the valve comprises a valve body, two bearings, a valve shaft, a shaft sleeve and a butterfly plate, wherein two mounting holes which are symmetrically arranged relative to the central axis of the valve body are formed in the side wall of the valve body, the two bearings are fixed on the outer wall of the valve body and coaxially arranged in the mounting holes in a one-to-one correspondence mode, the valve shaft is partially arranged in the valve body, two ends of the valve body sequentially penetrate through the mounting holes and the bearings respectively, the bearing inner rings are connected, the valve body is coaxially and detachably sleeved in the shaft sleeve, the valve shaft is arranged in the shaft sleeve, the outer edge of the butterfly plate is matched with the inner wall of the valve body, and one side. Compared with the prior art, the beneficial effects of the utility model are that: the structure that the shaft sleeve is sleeved with the valve shaft is adopted, so that the valve shaft is not directly contacted with a fluid medium in a pipeline, the durability of the valve shaft is improved, the integrity of the valve shaft is enhanced, and the valve shaft is not easy to deform; in addition, still greatly reduced the assembly degree of difficulty of butterfly valve, saved the human cost.

Drawings

Fig. 1 is a front view of a butterfly valve according to an embodiment of the present invention;

fig. 2 is a right side view of a butterfly valve according to an embodiment of the present invention;

in the figure, 1-valve body, 11-mounting hole, 2-bearing base, 3-bearing, 4-valve shaft, 5-shaft sleeve, 6-butterfly plate, 7-valve seat, 8-sealing felt, 9-transmission device, 91-head end long rod, 92-middle long rod, 93-tail end long rod, 94-valve position indication mark and 10-driving device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the present invention provides a butterfly valve, which includes a valve body 1, two bearing bases 2, two bearings 3, a valve shaft 4, a shaft sleeve 5, a butterfly plate 6, a valve seat 7, a sealing felt 8, a transmission device 9, and a driving device 10.

Referring to fig. 1, two mounting holes 11 symmetrically arranged with respect to a central axis of the valve body 1 are formed in a side wall of the valve body 1, two bearing bases 2 are respectively disposed at the two mounting holes 11, and two bearings 3 are respectively fixed on the two bearing bases 2 and coaxially disposed in one-to-one correspondence with the mounting holes 11. The valve shaft 4 is partially arranged in the valve body 1, and two ends of the valve shaft respectively penetrate through the mounting hole 11 and the bearing 3 in sequence and are connected with the inner ring of the bearing 3. In this embodiment, the inner ring of the bearing 3 is connected to the valve shaft 4 by a stop screw. The shaft sleeve 5 is arranged in the valve body 1 and coaxially and detachably sleeved on the valve shaft 4, and in the embodiment, the shaft sleeve 5 is fixedly connected with the valve shaft 4 through bolts. The outer edge of the butterfly plate 6 is matched with the inner wall of the valve body 1, and one side surface of the butterfly plate is connected with the outer wall of the shaft sleeve 5 which is arranged along the radial direction of the butterfly plate.

Referring to fig. 1, the valve seat 7 is annularly disposed and fixed on an inner wall of the valve body 1. The butterfly valve further comprises a sealing felt 8 laid on the inner side face of the valve seat 7, and the sealing felt 8 is used for improving the tightness of the butterfly valve.

Referring to fig. 1 and 2, the transmission device 9 is composed of three head end long rods 91, a middle long rod 92 and a tail end long rod 93 which are sequentially hinged, the head end long rod 91 is vertically and fixedly connected with the output shaft of the driving device 10, and the tail end long rod 93 is vertically and fixedly connected with the valve shaft 4. Head end stock 91 is under drive arrangement 10's drive, rotate as the axle to drive arrangement 10's output shaft, stock 92 upwards or downstream along with it in the middle of with head end stock 91 articulated, thereby it uses valve shaft 4 to rotate as the axle with its articulated tail end stock 93 to drive, because

tail end stock

93 and 4 fixed connection of valve shaft, consequently, valve shaft 4 can rotate along with tail end stock 93's rotation, and then drive axle sleeve 5 and butterfly plate 6 and rotate, thereby the control butterfly valve is opened or is closed.

Meanwhile, a limit fan groove with an angle of 90 degrees is arranged in the rotation range of the long rod 93 at the tail end of the side surface of the valve body 1, and a valve position indication mark 94 and angle scales are marked in the limit fan groove, wherein the position of 0 degree is completely sealed corresponding to the butterfly valve, and the position of 90 degrees is completely opened corresponding to the butterfly valve. Thus, the purpose of quantitatively controlling the opening degree of the butterfly valve is achieved.

The assembly process of the device is as follows: the method comprises the steps of installing a bearing 3 at a bearing base 2 of a valve body 1, welding a shaft sleeve 5 on a butterfly plate 6 along the radial direction of the butterfly plate 6, respectively installing a valve seat 7 and a sealing felt 8 into the valve body 1, then installing the butterfly plate 6 into the valve body 1, communicating the shaft sleeve 5 with an installation hole 11 of the valve body 1, inserting a valve shaft 4 into the bearing 3, the installation hole 11 and the shaft sleeve 5, and finally fixing the valve shaft 4 and the bearing 3 to finish the assembling process. Therefore, the device is very convenient to assemble, and labor cost can be greatly saved; similarly, the maintainability of the device is stronger. Furthermore, the valve shaft 4 is more durable than a conventional butterfly valve because it is not in direct contact with the fluid medium in the pipe.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A butterfly valve, comprising: the valve comprises a valve body, two bearings, a valve shaft, a shaft sleeve and a butterfly plate, wherein two mounting holes which are symmetrically arranged relative to the central axis of the valve body are formed in the side wall of the valve body, the two bearings are fixed on the outer wall of the valve body and coaxially arranged in the mounting holes in a one-to-one correspondence mode, the valve shaft is partially arranged in the valve body, two ends of the valve body sequentially penetrate through the mounting holes and the bearings respectively, the bearing inner rings are connected, the valve body is coaxially and detachably sleeved in the shaft sleeve, the valve shaft is arranged in the shaft sleeve, the outer edge of the butterfly plate is matched with the inner wall of the valve body, and one side.

2. The butterfly valve of claim 1 wherein said bearing cone is attached to said valve shaft with a set screw.

3. The butterfly valve of claim 1 further comprising two bearing seats disposed at two of said mounting holes of said valve body, wherein said two bearings are fixed to said two bearing seats, respectively.

4. The butterfly valve of claim 1 wherein said hub is fixedly coupled to said valve shaft with a bolt.

5. The butterfly valve of claim 1 further comprising a valve seat, said valve seat being annularly disposed and secured to an inner wall of said valve body; the butterfly valve also comprises a sealing felt laid on the inner side surface of the valve seat.

6. The butterfly valve of claim 1 further comprising a drive mechanism for driving rotation of the valve shaft.

7. The butterfly valve of claim 6 wherein said drive mechanism includes a drive mechanism and a transmission mechanism, said transmission mechanism comprising three sequentially articulated rods, said rod at a head end being fixedly attached perpendicularly to an output shaft of said drive mechanism and said rod at a tail end being fixedly attached perpendicularly to said valve shaft.