CN210003829U

CN210003829U - wear-resistant butterfly valve body

Info

Publication number: CN210003829U
Application number: CN201822195876.2U
Authority: CN
Inventors: 董延毅
Original assignee: Dalian Zhongzhi Machinery Co Ltd
Current assignee: Dalian Zhongzhi Machinery Co Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-01-31
Anticipated expiration: 2028-12-26

Abstract

The utility model discloses an wear-resistant butterfly valve body, the device comprises a device body, the device body comprises valve body and flange, the flange both sides are provided with the connecting pipe, the connecting pipe is close to valve body side and is provided with flange, flange passes through bolt fixed connection, the inside valve plate that is provided with of valve body, the valve plate outside and valve body inboard all are provided with chromium-plated layer, the valve rod has been inserted to the valve plate inside, the valve rod upper end is passed the valve rod through-hole and is stretched out the valve body, the valve rod through-hole is located the valve body upside, bolt mounting is passed through to valve rod through-hole bottom at the valve body upside the chromium-plated layer that uses is that the technology through electroplating is electroplated at the internal and external surface of valve body with chromium, and chromium-plated layer has very high hardness, and is different according to plating bath composition and technological condition, and its hardness can be in very big range 400 ~ HV 1200HV internal changes, and chromium-plated layer.

Description

wear-resistant butterfly valve body

Technical Field

The utility model relates to a flange equipment technical field specifically is kinds of butterfly valve bodies that stand wear and tear.

Background

A butterfly valve, called as a flap valve, is regulating valves with simple structures, and can be used for on-off control of low-pressure pipeline media, namely, a closing member (a valve clack or a butterfly plate) is a disc, the disc rotates around a valve shaft to achieve valves for opening and closing, the butterfly plate is driven by a valve rod, if the disc rotates 90 degrees, times of opening and closing can be completed, the deflection angle of the butterfly plate is changed, the flow of the media can be controlled, the existing valve plate has poor wear resistance, and the valve body can be abraded after long-term use, so that the sealing performance of the butterfly valve is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide kinds of butterfly valve bodies that stand wear and tear to propose in solving above-mentioned background art, current valve plate wearability is relatively poor, and long-term use will cause wearing and tearing to the valve body, makes the relatively poor problem of sealing performance of butterfly valve.

In order to achieve the purpose, the utility model provides a wear-resistant butterfly valve body, including the device body, the device body comprises valve body and flange, valve body and flange are the metal material, flange is located the valve body both ends, valve body and flange are body settings, the flange upside is provided with a plurality of screws, the screw evenly distributed is at the flange upside, the screw runs through flange, the flange both sides are provided with the connecting pipe, the connecting pipe is close to valve body side and is provided with flange, flange passes through bolt fixed connection, the inside valve plate that is provided with of valve body, the valve plate is the metal material, the valve plate outside and valve body inboard all are provided with chromium-plated layer, the valve rod has been inserted to the valve plate inside, the valve rod upper end is passed the valve rod through-hole and is stretched out the valve body, the valve rod through-hole is located the valve body upside, the valve rod through-hole bottom is through the.

Preferably, the valve rod through hole and the bottom end of the valve body are both provided with a dynamic sealing gasket, and the dynamic sealing gasket is arranged on the outer side of the valve rod.

Preferably, the bolt is an aluminum alloy product and is provided with a hexagon flange bolt.

Preferably, the outer side of the connecting flange is provided with a gasket, the gasket is welded on the outer side of the connecting flange, and the gasket is a soft metal gasket.

Preferably, a groove is formed in the inner side of the connecting flange, and a plug is arranged at the end, close to the valve body , of the connecting pipe, and the plug is inserted into the groove.

Preferably, the valve body bottom is provided with the bearing, and the welding of the bearing outside is inboard in the valve body bottom, and the valve rod bottom inserts inside the bearing.

Compared with the prior art, the beneficial effects of the utility model are that the chromium coating that this utility model used is electroplated at the internal and external surface of valve body through the technology of electroplating, the chromium coating has very high hardness, it is different according to plating bath composition and process conditions, its hardness can change in very large scale 400 ~ 1200HV, the coefficient of friction of chromium coating is little simultaneously, especially dry friction coefficient, it is minimum in all metals, so the chromium coating has fine wearability, the chromium coating has good chemical stability, in alkali, sulphide, all do not take place to act on in nitric acid and most of organic acids has stronger corrosion resistance, the dynamic seal pad is sealed through the relative motion of dynamic seal's mode in to machinery, avoid linking department between valve body and the valve rod to appear the phenomenon of leaking, the bolt is provided with the flange bolt, hexagon head and flange dish and screw play the constitution fastener, the thin part of the area piece of flange, deformation that can be a little, can lock more durable, the soft metal pad can take place to warp when receiving the extrusion, fill the space of valve body and valve body junction, guarantee the clearance of valve body connection, the contact area of valve body and valve body between can reduce through the tight contact resistance and the connecting pipe, the contact area of valve body and the bearing and the connecting pipe that can reduce simultaneously, the contact area of valve body, it can reduce to reduce, the connecting pipe, the contact area of the contact with the valve body and the valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the valve body of the present invention;

fig. 3 is a schematic view of the valve body connection structure of the present invention.

In the figure: 1. a device body; 2. a connecting flange; 3. a valve body; 4. a bolt; 5. a groove; 6. a screw hole; 7. a chromium plating layer; 8. a valve stem through bore; 9. a dynamic seal gasket; 10. a connecting pipe; 11. a pin; 12. a gasket; 13. a bearing; 14. a valve plate; 15. a valve stem.

Detailed Description

The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of , but not all embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", " end", " end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that unless otherwise explicitly stated or limited, the terms "mounted," disposed, "" connected, "and the like are used to mean, for example," connected, "may be a fixed connection, a detachable connection, or body-connected," may be a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements.

Referring to fig. 1-3, the utility model provides an kinds of embodiments are wear-resistant butterfly valve bodies, including device body 1, device body 1 comprises valve body 3 and flange 2, valve body 3 and flange 2 are the metal material, flange 2 is located the valve body 3 both ends, valve body 3 and flange 2 are the body setting, flange 2 upside is provided with a plurality of screws 6, screws 6 evenly distributed is at flange 2 upside, screws 6 run through flange 2, flange 2 both sides are provided with connecting pipe 10, connecting pipe 10 is close to valve body 3 side and is provided with flange 2, flange 2 passes through bolt 4 fixed connection, valve plate 14 is provided to the inside of valve body 3, valve plate 14 is the metal material, the valve plate 14 outside and the valve body 3 inboard all are provided with chromium-plated layer 7, valve rod 15 has been inserted to the valve plate 14 inside, the upper end of valve rod 15 passes valve rod through-hole 8 and stretches out valve body 3, valve rod through-hole 8 is located the valve body 3 upside, install the bottom at the valve body 3 upside through.

Step , the valve rod through hole 8 and the valve body 3 bottom all are provided with the dynamic seal pad 9, and the dynamic seal pad 9 is in the valve rod 15 outside, and the dynamic seal pad 9 seals the relative motion in the machinery through the mode of dynamic seal, avoids the phenomenon that the joint between valve body 3 and the valve rod 15 appears leaking.

, the bolt 4 is made of aluminum alloy, the bolt 4 is provided with a hexagon flange bolt, the hexagon head, the flange disc and the screw form a fastener, and the thin part of the flange belt can be slightly deformed and can be locked more firmly.

Step , the outside of the connecting flange 2 is provided with a gasket 12, the gasket 12 is welded on the outside of the connecting flange 2, the gasket 12 is set as a soft metal pad, the soft metal pad can deform when being extruded, the gap at the joint of the valve body 3 and the connecting pipe 10 is filled, and the tightness of the connection is ensured.

Step , the inside of the flange 2 is provided with a groove 5, the end of the connecting pipe 10 close to the valve body 3 is provided with a pin 11, the pin 11 is inserted into the groove 5, the groove 5 and the pin 11 can increase the contact area between the connecting pipe 10 and the valve body 3, and the joint of the valve body 3 and the connecting pipe 10 is prevented from deviating.

Step , the bottom end of the valve body 3 is provided with a bearing 13, the outer side of the bearing 13 is welded on the inner side of the bottom end of the valve body 3, the bottom end of the valve rod 15 is inserted into the bearing 13, the bearing 13 can reduce the resistance and the friction between the valve rod 15 and the valve body 3, the control device body 1 is more convenient, and meanwhile, the abrasion between the valve rod 15 and the valve body 3 can be reduced.

The working principle is as follows: the chromium plating layer 7 is used for plating chromium on the inner surface and the outer surface of the valve body 3 through an electroplating process, the chromium plating layer 7 has high hardness, the hardness can be changed within a large range of 400-1200 HV according to different plating solution components and process conditions, meanwhile, the friction coefficient, especially the dry friction coefficient, of the chromium plating layer 7 is the lowest among all metals, so that the chromium plating layer 7 has good wear resistance, the chromium plating layer 7 has good chemical stability, the chromium plating layer 7 does not act in alkali, sulfide, nitric acid and most organic acids and has strong corrosion resistance, when the valve rod 15 is rotated, the bearing 13 can reduce the resistance and the friction between the valve rod 15 and the valve body 3, the control device body 1 is more convenient, meanwhile, the abrasion between the valve rod 15 and the valve body 3 can be reduced, when the valve rod is connected with the connecting pipe 10, the pin 11 is inserted into the groove 5 and passes through the groove 5 and the pin 11, can increase the area of contact between connecting pipe 10 and the valve body 3, avoid the skew to appear in the linking department of valve body 3 and connecting pipe 10, the soft metal pad can take place to warp when receiving the extrusion, fill the space of valve body 3 and connecting pipe 10 junction, guarantee the compactness of connecting, when rotating valve rod 15, the dynamic seal pad 9 seals through the relative motion of dynamic seal's mode in to machinery, avoid linking department between valve body 3 and the valve rod 15 the phenomenon that the leakage appears.

It will thus be seen that the present invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

The wear-resistant butterfly valve body comprises a device body (1) and is characterized in that the device body (1) is composed of a valve body (3) and connecting flanges (2), the valve body (3) and the connecting flanges (2) are made of metal materials, the connecting flanges (2) are located at two ends of the valve body (3), the valve body (3) and the connecting flanges (2) are -body-arranged, a plurality of screw holes (6) are formed in the upper side of the connecting flanges (2), the screw holes (6) are uniformly distributed in the upper side of the connecting flanges (2), the screw holes (6) penetrate through the connecting flanges (2), connecting pipes (10) are arranged on two sides of the connecting flanges (2), the connecting pipes (10) are provided with the connecting flanges (2) close to the side of the valve body (3) , the connecting flanges (2) are fixedly connected through bolts (4), a valve plate (14) is arranged inside the valve body (3), the valve plate (14) is made of metal materials, chromium layers (7) are arranged on the outer side of the valve plate (14) and the inner side of the valve body (3), a bolt (15) penetrates through hole (8) of the valve rod (3), and the valve rod (8) extends out of the through hole (8).
2. kinds of wear-resistant butterfly valve body, according to claim 1, characterized in that the valve stem through hole (8) and the bottom end of the valve body (3) are both provided with dynamic sealing gaskets (9), and the dynamic sealing gaskets (9) are outside the valve stem (15).
3. kinds of wear-resistant butterfly valve body according to claim 1, characterized in that the bolt (4) is an aluminum alloy product and the bolt (4) is provided with a hexagon flange bolt.
4. wear-resistant butterfly valve body according to claim 1, characterized in that a gasket (12) is arranged outside the connecting flange (2), the gasket (12) is welded outside the connecting flange (2), and the gasket (12) is a soft metal gasket.
5. kinds of wear-resistant butterfly valve body, according to claim 1, characterized in that the connecting flange (2) is provided with a groove (5) on the inside, the connecting pipe (10) is provided with a pin (11) near the end of the valve body (3), and the pin (11) is inserted into the groove (5).
6. wear-resistant butterfly valve body according to claim 1, wherein the bottom end of the valve body (3) is provided with a bearing (13), the outer side of the bearing (13) is welded to the inner side of the bottom end of the valve body (3), and the bottom end of the valve rod (15) is inserted into the bearing (13).