CN202812443U

CN202812443U - Double eccentric clamp type butterfly valve

Info

Publication number: CN202812443U
Application number: CN 201220484367
Authority: CN
Inventors: 蔡春喜; 刘长利
Original assignee: Tianjin Tanggu Water-seal Valve Co Ltd
Current assignee: Tianjin Tanggu Water-seal Valve Co Ltd
Priority date: 2012-09-21
Filing date: 2012-09-21
Publication date: 2013-03-20
Anticipated expiration: 2022-09-21

Abstract

Provided is a double eccentric clamp type butterfly valve which comprises a valve body, an upper rotating shaft, an upper rotating shaft cavity which is arranged on the valve body to accommodate a rotating shaft and a packing structure which is arranged between the upper rotating shaft cavity and the upper rotating shaft, the packing structure is a packing sleeve which is positioned between the upper rotating shaft and the inner wall of the upper rotating shaft cavity of the valve body, the packing sleeve is in a cylindrical structure, wherein the inner side wall and the outer side wall of the packing sleeve are respectively provided with at least two annular grooves to accommodate packing O-shaped rings. After adopting the eccentric seal vice compression, the double eccentric clamp type butterfly valve is less in closed mobile, light in friction, and durable in use. Meanwhile, the upper rotating shaft is internally and externally provided with four O-shaped rings, the packing sleeve can not only retain the coefficient of friction of the O-shaped rings tightly clamped by a shaft sleeve, but also remain good sealing of compressed packing materials and achieve zero leakage under 4Mpa according to the sealing of the multi-channel O-shaped rings. This packing structure has the advantages of being simple in structure, easy to replace, and good in sealing effect, and the packing structure is preferred by the packing way of the medium and low pressure butterfly valve.

Description

Two eccentric clamp band type butterfly valves

Technical field

The utility model relates to valve technology field, particularly relates to a kind of two eccentric clamp band type butterfly valve.

Background technique

Butterfly valve is with about 90 ° a kind of valves of opening, cut out or regulating rate-of flow of disc type open-shut device reciprocating rotating.Butterfly valve not only simple in structure, volume is little, lightweight, material consumption is economized, installation dimension is little, driving moment is little, easy and simple to handle, rapid, and can have simultaneously good flow regulating function and close sealing characteristics, be in recent ten years one of valve kind with fastest developing speed.The use of butterfly valve is very extensive.The kind of its use and quantity still continue to enlarge, and to high temperature, high pressure, heavy caliber, high leak tightness, long lifetime, good control characteristic, and the multi-functional development of a valve.Its reliability and other performance index all reach higher level.

But the filler mode that common butterfly valve adopts generally all adopts axle sleeve to clamp O shape circle or Gland compresses O shape circle.Although it is simple in structure that axle sleeve clamps O shape circle, little to the damage of O shape circle, not fine for sealing effect, the spindle nose seepage can often appear in actual use.Although Gland compresses O shape circle has overcome axle sleeve clamping O shape circle in sealing drawback, but the damage for O shape circle has strengthened, when compressing, probably O shape circle is caused the damage of unrepairable, although guaranteed that in actual use axle sleeve is non-leakage, but find from the new clothes timing again that after the valve maintenance O shape circle that filler uses has occurred damaged or distortion.

Summary of the invention

The purpose of this utility model is for the technological deficiency that exists in the prior art, and a kind of two eccentric clamp band type butterfly valve is provided.

For realizing that the technological scheme that the purpose of this utility model adopts is:

A kind of two eccentric clamp band type butterfly valve, comprise valve body, upper rotating shaft, be arranged on the valve body with the upper post-receiving chamber that holds rotating shaft and be arranged on upper post-receiving chamber and upper rotating shaft between filling-material structure, described filling-material structure is to be positioned in the filler cover between the post-receiving chamber internal face on rotating shaft and the valve body, described filler cover is cylinder-like structure, and outer side wall is respectively arranged with at least two in order to hold the annular groove of filler O shape circle in described filler cover.

Described filler cover internal face up and down two ends is formed with twice accordingly in order to hold filler O shape ring annular groove, and middle part is formed with the annular groove that encloses in order to hold filler O shape of twice spaced and parallel setting on its outer wall.

The position structure of described filler cover comprises the support ring platform that is formed on the post-receiving chamber inboard, jump ring and be formed on post-receiving chamber upper opening place in order to locate the draw-in groove of jump ring.

Compared with prior art, the beneficial effects of the utility model are:

It is few to close amount of movement behind the secondary pressurized of the utility model employing eccentric-type sealed, and the friction mild degree is so wearing and tearing are few, durable in use.Go up simultaneously rotating shaft place and be four road O shapes circle inside and outside, this filler cover had both kept axle sleeve, and to clamp the friction factor of O shape circle little, kept again the good airproof performance of jam type packing, adopts the multiple tracks seal with O ring, can guarantee to realize below 4Mpa that 0 leaks.The advantage of this filling-material structure is simple in structure, and it is convenient to change, and can also guarantee good sealing effect simultaneously, is the preferred filler structure of mesolow butterfly valve filler mode.

Description of drawings

Figure 1 shows that the utility model butterfly valve structure schematic representation;

Figure 2 shows that the local enlarged diagram of A section shown in Figure 1.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

As illustrated in fig. 1 and 2, butterfly valve of the present utility model is two eccentric clip butterfly valves, it comprises valve body 1, bottom O shape circle, lower rotary shaft, Lower shaft sleeve, valve seals, valve plate, upper rotating shaft 2, valve body O shape circle, Upper shaft sleeve, filling-material structure, jump ring 3 and fluted disc etc., specifically, butterfly valve of the present utility model adopts upper rotating shaft core both to depart from the butterfly plate center, the two eccentric structures that also depart from the valve body center, the effect of two off-centre make the valve rear butterfly plate that is unlocked can immediately break away from valve seat, eliminated significantly the unnecessary excessive compression of butterfly plate and valve seat, the scraping phenomenon, alleviated and opened the resistance distance, wearing and tearing have been reduced, improved longer seat life.

Simultaneously, the utility model valve body two ends arranged outside is fixedly connected with the groove 4 that pipe fitting is used, and namely adopts the connection of groove pipe fitting, and operation is very easy, need not special professional skill, and the common laborer can operate through simple training.This is because product has been added to a large amount of meticulous technology parts in the finished product in the batch production mode.One place's pipe fitting connects only needs time a few minutes, has simplified to greatest extent the technical difficulty of execute-in-place, saves man-hour, thereby has also stablized construction quality, has improved working efficiency.

As shown in Figure 2, the filling-material structure of the utility model valve comprises the filler cover 5 that is positioned between rotating shaft 2 and the upper post-receiving chamber internal face, described filler cover is cylinder-like structure, inner wall surface thereof up and down two ends is formed with twice accordingly in order to hold the annular groove of filler O shape circle, what partly be formed with the setting of twice spaced and parallel in the middle of on its outer wall encloses 12 annular groove in order to hold filler O shape, namely by cylindric filler cover between upper rotating shaft and upper post-receiving chamber and in cover both sides, inside and outside the annular groove that can hold filler O shape circle is set respectively.

Simultaneously, described filler cover position structure comprises the support ring platform that is formed in the post-receiving chamber, be formed with to locate simultaneously the draw-in groove 3 of jump ring at upper post-receiving chamber upper opening place, going up when mounted the ladder platform shape support ring platform of post-receiving chamber bottom can locate it, and the jump ring on top can to its location, top, keep it can not overflow equally.

When assembling, first O shape circle has been placed in the filler cover that processes, again axle sleeve is fixed on the valve body with jump ring, so just that the filler cover is fixing in the dust, the friction factor that this filler cover had both kept axle sleeve clamping O shape circle is little, the good airproof performance that has kept again jam type packing adopts the multiple tracks seal with O ring, can guarantee to realize below 4Mpa that 0 leaks.The advantage of this filling-material structure is simple in structure, and it is convenient to change, and can also guarantee good sealing effect simultaneously, is the preferred filler structure of mesolow butterfly valve filler mode.

The above only is preferred implementation of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. two eccentric clamp band type butterfly valve, comprise valve body, upper rotating shaft, be arranged on the valve body with the upper post-receiving chamber that holds rotating shaft and be arranged on upper post-receiving chamber and upper rotating shaft between filling-material structure, it is characterized in that, described filling-material structure is to be positioned in the filler cover between the post-receiving chamber internal face on rotating shaft and the valve body, described filler cover is cylinder-like structure, and outer side wall is respectively arranged with at least two in order to hold the annular groove of filler O shape circle in described filler cover.

2. two eccentric clamp band type butterfly valve as claimed in claim 1, it is characterized in that, described filler cover internal face up and down two ends is formed with twice accordingly in order to hold filler O shape ring annular groove, and middle part is formed with the annular groove that encloses in order to hold filler O shape of twice spaced and parallel setting on its outer wall.

3. two eccentric clamp band type butterfly valve as claimed in claim 1 or 2 is characterized in that, the position structure of described filler cover comprises the support ring platform that is formed on the post-receiving chamber inboard, jump ring and be formed on post-receiving chamber upper opening place in order to locate the draw-in groove of jump ring.