CN210661394U - Fire-fighting double-seal butterfly valve - Google Patents

Abstract

The utility model provides a fire control double containment butterfly valve belongs to the valve equipment field, including valve body, valve plate and sealing layer, the upper end and the lower extreme of valve plate are all rotated and are connected in the valve body, the valve body is including the circulation cavity, the sealing layer parcel is in the valve plate is located the part in the circulation cavity, the outer lane of sealing layer circumference is equipped with the deformation of at least one indent and keeps away the position groove, the degree of depth that keeps away the position groove is warp and is 0.2 ~ 0.4 mm. The utility model discloses change traditional seal structure, cancel the rubber circle of valve body inside lining, set up the sealing layer on the valve plate, utilize the sealing layer to realize sealedly with the pre-compaction under the valve body inner circle fit state, simple structure, in the later maintenance process moreover, directly change the valve plate can, greatly reduced the maintenance cost.

Description

Fire-fighting double-seal butterfly valve

Technical Field

The utility model belongs to the valve equipment field relates to a butterfly valve, especially relates to fire control double containment butterfly valve.

Background

The fire-fighting double-seal butterfly valve is a butterfly valve applied to a fire-fighting pipeline, in the practical application process, the fire-fighting pipeline is always in a static state and can be started only in an emergency state, however, once the device is started, the device must be in a stable and good working state and is used for saving emergencies, so that the safety, practicability and stability must be ensured, the requirement on the pipeline is strict, the pipeline needs good pressure resistance, corrosion resistance and high temperature resistance, the butterfly valve can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, the butterfly valve mainly plays the roles of cutting and throttling on the pipeline, the butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, therefore, the purpose of opening and closing or adjusting is achieved, and the stability of the fire-fighting double-seal butterfly valve is higher than that of a common butterfly valve.

Among the present conventional butterfly valve structure, the rubber circle is established to the inner circle lining at the valve body, cooperate the mode of rubber circle and valve body with the interference, be equivalent to the whole lining rubber in the internal surface of valve body, the butterfly plate adopts the metal material, utilize the butterfly plate to rotate the in-process, the butterfly plate is to the pre-compaction deformation realization of rubber circle cut off with the function of throttle, but the course of working of whole lining rubber is carried out in the inside of valve body is troublesome, the processing cost is high, and in case the rubber circle damages, need cut off the back with pipeline medium stream, assemble the completion again after changing whole valve body, the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide a fire control double containment butterfly valve changes traditional seal structure, and the rubber circle of cancellation valve body inside lining sets up the sealing layer on the valve plate, utilizes the sealing layer to realize sealedly with the pre-compaction under the valve body inner circle fit state, simple structure, and in the later maintenance process moreover, directly change the valve plate can, greatly reduced the maintenance cost.

In order to solve the technical problem, the utility model discloses a technical scheme is: fire control double containment butterfly valve, including valve body, valve plate and sealing layer, the upper end and the lower extreme of valve plate are all rotated and are connected in the valve body, the valve body is including the circulation cavity, the sealing layer parcel is in the valve plate is located part in the circulation cavity, the outer lane of sealing layer circumference is equipped with the deformation of at least one indent and keeps away the position groove, the degree of depth that keeps away the position groove in the deformation is 0.2 ~ 0.4 mm.

Furthermore, the sealing layer is arranged in an equal thickness mode, the thickness of the sealing layer is not less than 4mm, and the valve plate is located in the circulation cavity and is of a spherical crown structure.

Furthermore, the number of the deformation avoiding grooves is two, the deformation avoiding grooves are arranged in parallel, the two deformation avoiding grooves are symmetrically arranged relative to the central plane in the thickness direction of the sealing layer in a dispersing mode, the sections of the deformation avoiding grooves are semicircular, and the depth of the deformation avoiding grooves is 0.3 mm.

Further, the valve plate and the sealing layer are integrated into a whole through equal-thickness casting, and the sealing layer is made of ethylene propylene diene monomer.

Furthermore, the two ends of the circulation cavity are provided with expansion cavities, the diameter of each expansion cavity is larger than that of the circulation cavity, and the height difference between the expansion cavities and the circulation cavity is 2-3 mm.

Further, the valve body is made of cast iron, the valve plate comprises a valve rod and a sealing plate which are fixed into a whole, the sealing plate is made of cast iron, the valve rod is made of stainless steel, and the valve rod and the sealing plate rotate through polygonal prismatic wedging.

Furthermore, the lower end of the valve rod is rotatably connected with the valve body through a lower shaft sleeve, the upper end of the valve rod is rotatably connected with the valve body through an upper shaft sleeve, the lower end of the upper shaft sleeve is arranged in contact with the sealing layer, the upper end of the upper shaft sleeve is provided with a filler fixed by a compression nut, and the filler and the valve rod are coaxially arranged.

Furthermore, the filler is glass fiber, and three parallel O-shaped rubber rings arranged at intervals are arranged between the glass fiber layers.

Furthermore, the part of the upper end of the valve rod, which extends out of the valve body, is connected with a hand wheel through a turbine assembly, the hand wheel is connected with an input shaft of the turbine assembly through a shaft pin, and a switch indication arrow is arranged on the surface of the hand wheel.

Furthermore, the inner surface and the outer surface of the valve body are provided with epoxy resin electrostatic spraying layers.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

1. The utility model changes the traditional structure, the sealing layer is arranged on the valve plate, the valve body is directly cast and molded, and the sealing specific pressure can be automatically established by the deformation generated after the sealing layer is matched with the valve body; the valve plate has the advantages that the forward and reverse sealing performance of the valve plate can be greatly improved, the valve plate realizes bidirectional sealing, prevents reverse sealing leakage, is beneficial to reducing opening and closing torque, is convenient to operate, increases corrosion resistance, reduces assembly technology, improves assembly efficiency, is excellent in sealing reliability and practicability, reserves the elastic deformation of a sealing layer after a groove is arranged, is convenient to extrude, and is more flexible in switching action;

2. the sealing layer is arranged in an equal thickness mode, preferably 5mm, the deformation effect of 5mm meets the sealing requirement, the thickness of the sealing layer is too small, the deformation is not large enough, the sealing effect is poor, the sealing layer is easy to lose effectiveness, if the thickness of the sealing layer is too thick, the prepressing is too large, the torque is too large, and the prepressing causes the situation of poor sealing effect; the valve plate adopts a spherical crown structure, so that the strength is higher, and the appearance is more attractive;

3. the valve plate forms integratively through the isopachous casting with the sealing layer, adopts the electrical heating mould technology directly to melt the vulcanized rubber and casts into the sealing layer after closing plate processing is accomplished, and the two directly forms integratively under high temperature state, the problem that drops can not appear, and in traditional structure relatively, the lining of valve body is glued the assembling process and is simplified greatly, and this structure is fit for quick mass production moreover, and the automatic production of mould can, promotes work efficiency, reduces working strength.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a cross-sectional view of the fire-fighting double-seal butterfly valve of the utility model;

FIG. 2 is a schematic structural view of the fire-fighting double-seal butterfly valve of the present invention;

FIG. 3 is a cross-sectional view of the valve body of the present invention in a state of being engaged with the sealing layer;

fig. 4 is a cross-sectional view of the sealing layer of the present invention.

Reference numerals:

1. a valve body; 2. a valve stem; 3. a sealing plate; 4. an upper shaft sleeve; 41. a lower shaft sleeve; 5. a filler; 6. a compression nut; 7. a sealing layer; 71. a deformation avoiding groove; 8. a flow-through chamber; 9. expanding the cavity; 10. a shaft pin; 11. a turbine assembly; 12. a handwheel.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model discloses a fire control double containment butterfly valve, including valve body 1, valve plate and sealing layer 7, the upper end and the lower extreme of valve plate all rotate to be connected in valve body 1, valve body 1 includes circulation cavity 8, sealing layer 7 wraps up the part that is located circulation cavity 8 at the valve plate, the outer lane of sealing layer 7 circumference is equipped with deformation of at least one indent and keeps away a groove 71, the degree of depth that warp keeps away a groove 71 is 0.2 ~ 0.4mm, the deformation that produces after the cooperation between sealing layer 7 and the valve body 1 can establish sealed specific pressure automatically; the valve plate has the advantages that the forward and reverse sealing performance of the valve plate can be greatly improved, the valve plate realizes bidirectional sealing, prevents reverse sealing leakage, is beneficial to reducing opening and closing torque, is convenient to operate, increases corrosion resistance, reduces assembly technology, improves assembly efficiency, is excellent in sealing reliability and practicability, reserves the elastic deformation of the sealing layer 7 after the groove is arranged, is convenient to extrude, and is more flexible in switching action; more preferably, the shape tolerance of the valve plate and the sealing layer 7 after matching is controlled within plus or minus 1mm, and within the tolerance range, the deformation tolerance of the sealing layer 7 can compensate assembly or machining errors.

Preferably, sealing layer 7 is the same thickness setting and thickness is not less than 4mm, preferably 5mm, sealing layer 7's width is not less than 8mm, preferably 10mm, no matter valve diameter size, the deformation effect of 5mm thickness and 10mm width satisfies sealed demand, sealing layer 7's thickness undersize, the deflection is big enough, sealed effect is not good, and easy inefficacy, if sealing layer 7 is too thick, the pre-compaction is too big then the moment of torsion will be too big, the not good condition of sealed effect will appear in the pre-compaction, if the pipeline that the valve was used is too big, suitably increase sealing layer 7's thickness can, the part that the valve plate is located circulation cavity 8 is the spherical crown structure, the valve plate adopts the spherical crown structure, and intensity is higher, and the appearance is more pleasing to.

Preferably, the number of the deformation avoiding grooves 71 is two, the two deformation avoiding grooves 71 are arranged in parallel, the two deformation avoiding grooves 71 are symmetrically and dispersedly arranged relative to the central plane in the thickness direction of the sealing layer 7, the cross section of each deformation avoiding groove 71 is semicircular, the depth of each deformation avoiding groove 71 is 0.3mm, the deformation avoiding grooves are too deep, the deformation space is large, leakage is easy, the deformation avoiding grooves are too shallow, the sealing layer 7 is easy to abrade, and the service life is shortened.

Preferably, the valve plate is formed into an organic whole with the sealing layer 7 through the equal thickness casting, adopt the mould to directly cast the sealing layer 7 after the closing plate 3 processing is accomplished, the two directly form an organic whole under high temperature state, the problem that can not appear droing, in traditional structure relatively, the lining of valve body 1 rubber assembling process is greatly simplified, and this structure is fit for quick mass production, the automatic production of mould can, promote work efficiency, reduce working strength, the sealing layer 7 is made by ethylene propylene diene monomer material, ageing resistance is very good, weather resistance is good, electric insulating properties is good, chemical corrosion resistance is good, impact elasticity is better, the usability life-span is long, the stable performance, also can adopt materials such as butyl fine rubber or ethylene propylene diene monomer.

Preferably, the both ends of circulation cavity 8 are equipped with and expand chamber 9, and the diameter that expands chamber 9 is greater than the diameter of circulation cavity 8 and the difference in height of the two is 2 ~ 3mm, guarantees the pre-compaction volume to the part of sealing layer 7, expands the flow in the part at both ends simultaneously, alleviates the pressure that water pressure caused to the valve to a certain extent.

Preferably, the valve body 1 is cast by ball-milling cast iron and is manufactured by finish machining, the valve plate comprises a valve rod 2 and a sealing plate 3 which are fixed into a whole, split machining is performed and then assembly is performed, the thickness of the sealing plate 3 can be wider, sealing is stricter, compression is larger, a sealing surface is larger, a sealing effect is better, the sealing plate 3 is made of cast iron and replaces the prior stainless steel material, cost is lower, only the sealing plate 3 and the sealing layer 7 need to be replaced when maintenance and replacement are performed, the valve rod 2 is made of stainless steel, strength is high, service life is long, replacement is not needed when maintenance is performed, maintenance cost is reduced, the valve rod 2 and the sealing plate 3 rotate through polygonal prismatic wedging instead of a transmission pin fixing connection mode, connection is more stable and reliable, the situation that a pin with overlarge torque is broken cannot occur, torque transmission is more stable, service life is longer, and failure, the sealing plate made of metal has enough rigidity and rubber layer soft-hard transition made of vulcanized rubber, the elastic compensation of the absorbing rubber layer ensures reliable sealing of the valve, the later maintenance and disassembly are convenient, the service life is longer, and zero leakage can be achieved.

Preferably, the lower end of the valve rod 2 is rotatably connected with the valve body 1 through a lower shaft sleeve 41, the upper end of the valve rod 2 is rotatably connected with the valve body 1 through an upper shaft sleeve 4, the lower end of the upper shaft sleeve 4 is arranged in contact with a sealing layer 7, the upper end of the upper shaft sleeve 4 is provided with a packing 5 fixed by a compression nut 6, and the packing 5 and the valve rod 2 are coaxially arranged; more preferably, the filler 5 is glass fiber, and has good insulation, strong wear resistance, good corrosion resistance, high mechanical strength, difficult deformation, long fixing time and good stability, and three parallel O-shaped rubber rings arranged at intervals are arranged between the glass fiber layers.

Preferably, the part of the upper end of the valve rod 2 extending out of the valve body 1 is connected with a hand wheel 12 through a turbine assembly 11, the hand wheel is connected with an input shaft of the turbine assembly 11 through a shaft pin 10, the structure is simple, the connection is convenient, and a switch indication arrow is arranged on the surface of the hand wheel 12, so that the operation is convenient.

Preferably, the interior external surface of valve body 1 is equipped with epoxy electrostatic spraying layer, has anticorrosive effect, promotes valve body 1's life, reduces the probability of oxidizing in the use.

In the actual working process, the valve is installed on a fire pipeline, the circulation cavity 8 and the fire pipeline are coaxially arranged, the flange surfaces at two ends of the valve body 1 are fixedly and hermetically connected with the fire pipeline, the connection surface of the flange surfaces and the fire pipeline is directly hermetically connected by arranging a sealing ring structure, after the connection is finished, the driving of power is realized by a hand wheel 12, the torque is transmitted to the valve rod 2 through the turbine assembly 11, the valve rod 2 rotates to drive the sealing plate 3 and the sealing layer 7 wrapped on the sealing plate to rotate so as to realize the opening and closing actions, in the closed state, the sealing layer 7 is in contact with the circulation cavity 8 of the valve body 1, the sealing layer 7 is in a pre-pressing state, the sealing state between the sealing layer 7 and the inner wall of the valve body 1 is realized, once the valve rod 2 is damaged and needs to be replaced, only the sealing plate 3 and the sealing layer 7 wrapped on the sealing layer are required to be replaced, the maintenance cost is greatly reduced, the disassembly and the assembly are more convenient and quicker, and the operation is simpler.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (10)

1. Fire control double containment butterfly valve, its characterized in that: including valve body, valve plate and sealing layer, the upper end and the lower extreme of valve plate are all rotated and are connected in the valve body, the valve body is including the circulation cavity, the sealing layer parcel is in the valve plate is located part in the circulation cavity, the outer lane of sealing layer circumference is equipped with the deformation of at least one indent and keeps away the groove, the degree of depth that keeps away the groove in the deformation is 0.2 ~ 0.4 mm.

2. A fire protection dual seal butterfly valve according to claim 1, wherein: the sealing layer is of equal thickness and the thickness is not less than 4mm, the width of the sealing layer is not less than 8mm, and the valve plate is located the part in the circulation cavity is of a spherical crown structure.

3. A fire protection dual seal butterfly valve according to claim 1, wherein: the number of the deformation avoiding grooves is two, the deformation avoiding grooves are arranged in parallel, the deformation avoiding grooves are symmetrically arranged relative to the central plane in the thickness direction of the sealing layer and are arranged in a dispersing mode, the sections of the deformation avoiding grooves are semicircular, and the depth of the deformation avoiding grooves is 0.3 mm.

4. A fire protection dual seal butterfly valve according to claim 1, wherein: the valve plate and the sealing layer are integrated into a whole through equal-thickness casting, and the sealing layer is made of ethylene propylene diene monomer.

5. A fire protection dual seal butterfly valve according to claim 1, wherein: the two ends of the circulation cavity are provided with expansion cavities, the diameter of each expansion cavity is larger than that of the circulation cavity, and the height difference between the expansion cavities and the circulation cavity is 2-3 mm.

6. A fire protection dual seal butterfly valve according to claim 1, wherein: the valve body is made of cast iron, the valve plate comprises a valve rod and a sealing plate which are fixed into a whole, the sealing plate is made of cast iron, the valve rod is made of stainless steel materials, and the valve rod and the sealing plate rotate through polygonal prismatic wedging.

7. A fire protection dual seal butterfly valve according to claim 6, wherein: the lower end of the valve rod is rotatably connected with the valve body through a lower shaft sleeve, the upper end of the valve rod is rotatably connected with the valve body through an upper shaft sleeve, the lower end of the upper shaft sleeve is arranged in contact with the sealing layer, the upper end of the upper shaft sleeve is provided with a filler fixed by a compression nut, and the filler and the valve rod are coaxially arranged.

8. A fire protection dual seal butterfly valve according to claim 7, wherein: the filler is glass fiber, and three parallel O-shaped rubber rings arranged at intervals are arranged between the glass fiber layers.

9. A fire protection dual seal butterfly valve according to claim 7, wherein: the upper end of the valve rod extends out of the valve body, the part of the valve rod extends out of the valve body and is connected with a hand wheel through a turbine assembly, the hand wheel is connected with an input shaft of the turbine assembly through a shaft pin, and a switch indication arrow is arranged on the surface of the hand wheel.

10. A fire protection dual seal butterfly valve according to claim 1, wherein: and epoxy resin electrostatic spraying layers are arranged on the inner surface and the outer surface of the valve body.

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