CN202901318U

CN202901318U - Heavy caliber center line-type butterfly valve provided with hollow valve plate

Info

Publication number: CN202901318U
Application number: CN 201220471598
Authority: CN
Inventors: 黄凤娟
Original assignee: SHANGHAI EVER MARK VALVE CO Ltd
Current assignee: SHANGHAI EVER MARK VALVE CO Ltd
Priority date: 2012-09-14
Filing date: 2012-09-14
Publication date: 2013-04-24
Anticipated expiration: 2022-09-14

Abstract

The utility model relates to a heavy caliber center line-type butterfly valve provided with a hollow valve plate. The heavy caliber center line-type butterfly valve provided with the hollow valve plate comprises a valve body. An upper shaft sleeve is installed in an upper shaft hole in the valve body, and a lower shaft sleeve is installed in a lower shaft hole in the valve body. The valve body and a valve seat are assembling units, and the valve seat is sticked and fixed on the valve body by adopting glue. An outer circle of a valve plate is matched with an inner hole of the valve seat, and planes at two ends of the valve plate are in interference fit with planes at two ends of the valve seat. An upper valve rod and a lower valve rod of the valve plate are in interference fit with an upper valve rod hole and a lower valve rod hole of the valve seat. The upper valve rod and the lower valve rod penetrate through the upper shaft sleeve and the lower shaft sleeve to be matched with the valve seat. The valve plate is integrally cast and formed by adopting a hollow structure. A thrust bearing is matched with a bearing seat on the tail portion of the lower valve rod, an O-shaped ring is installed into an O-shaped ring groove on the tail portion of the valve body, and a tail cover is fixed on the tail portion of the valve body through a tail cover bolt and is in seamless fit with the plane of the thrust bearing. Upper gland packing penetrates through the upper valve rod to be filled in a step hole on the upper portion of the valve body, a sliding bearing is installed on a step of the upper valve rod, and an upper sealing pressing cover is fixed on the upper portion of the valve body through an upper sealing pressing cover bolt.

Description

The hollow valve plate centre-pivoted butterfly valve of heavy caliber band

Technical field

The utility model relates to a kind of centre-pivoted butterfly valve, relates in particular to the structure of this centre-pivoted butterfly valve.

Background technique

Butterfly valve is mainly used in the fields such as town water supply, petrochemical industry, desalination of sea water, medical apparatus, be divided into center line wafer type butterfly valve, center line flange-type butterfly valve, single eccentric-butterfly-valve, double eccentric butterfly valve and three eccentric butterfly valve, the structure difference of butterfly valve is so that application is also different.

Shown in Fig. 1, Fig. 2, Fig. 2 A, the heavy caliber centre-pivoted butterfly valve (DN700-DN2200) of prior art mainly by: tail-hood 1, valve body 2, axle sleeve 3, valve seat 4, valve plate 5, valve rod 6, pin 7, aluminium circle 9 and O type circle 8 parts form.

In the said structure, valve plate 5 is connected with valve rod to adopt has pin to connect, and valve plate is solid cast structure, and such structure has following disadvantage: 1, valve plate has very large weight, and the cost of raw material is higher; 2, valve plate rigidity is relatively poor, and when high pressure sealing was tested, the valve plate displacement was large, because valve plate and valve seat are interference fit, can drive valve seat when the valve plate displacement, easily causes valve seat creep and the prooving of valve seat, leaks thereby produce; What 3, valve plate and valve rod used is the taper pin transmission, needs burr-drill shape through hole on valve plate and valve rod, can reduce like this intensity of valve rod, and the structure of simultaneously taper pin connection namely can produce leakage if in a single day taper pin comes off;

Summary of the invention

The utility model technical issues that need to address have provided the hollow valve plate centre-pivoted butterfly valve of a kind of heavy caliber band, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: valve body; In the upper and lower axis hole of described valve body, be respectively charged into Upper shaft sleeve and Lower shaft sleeve; Described valve body and valve seat are assembly parts, and valve seat adopts glue to cement on the valve body; The valve plate cylindrical cooperates with described valve seat endoporus, valve plate end flat and valve seat end flat interference fit; The upper and lower valve rod hole interference fit of the upper valve rod on described valve plate and lower valve rod and described valve seat; Described upper valve rod and lower valve rod pass Upper shaft sleeve and Lower shaft sleeve cooperates with valve seat; Described valve plate adopts the hollow-core construction integral casting forming; Thrust-bearing cooperates with the bearing support of lower valve rod afterbody, and O type circle is packed in the O type ring recess of valve body afterbody, tail-hood by tail-hood be bolted to the valve body afterbody and and the seamless cooperation in thrust-bearing plane; Upper gland packing passes upper valve rod packs in the step hole on valve body top, and sliding bearing is contained on the step of upper valve rod, and upper sealing gland is bolted to valve body top by upper sealing gland.

Compared with prior art, the beneficial effects of the utility model are: 1, valve plate adopts hollow-core construction, and valve plate weight ratio prior art is light more than 10%, significantly reduces the cost of raw material; 2, arch bridge type valve board structure significantly improves the rigidity of valve plate, and maximum withstand voltage 140% of the working pressure that surpasses prevents because the valve seat creep that the valve plate displacement drives Leakage prevention; 3, valve plate and valve rod use without wearing design in the pin, and valve rod six square toes cooperate with the valve plate hexagonal hole, make to process simply, and need not on the valve rod to hole, and valve rod intensity is higher, but and make on the valve plate without any leak, improved the Security of valve.

Description of drawings

Fig. 1 is centre-pivoted butterfly valve structural representation in the prior art.

Fig. 2 is the valve board structure plan view among Fig. 1.

Fig. 2 A is that the A of Fig. 2 is to view.

Fig. 3 is the utility model structural representation.

Fig. 3 A is that Fig. 3 is along AA line sectional view;

Fig. 4 is the valve plate front view of Fig. 3 A.

Fig. 4 A is that the A of Fig. 4 is to view.

Fig. 5 is exploded perspective view of the present utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

By Fig. 3, Fig. 3 A, Fig. 4, Fig. 4 A, Fig. 5 as seen: the utility model comprises: valve body 19; In the upper and lower axis hole of described valve body 19, be respectively charged into Upper shaft sleeve 17 and Lower shaft sleeve 14; Described valve body 19 is assembly parts with valve seat 18, and valve seat 18 adopts glue to cement on the valve body 19; Valve plate 16 cylindricals cooperate with described valve seat 18 endoporus, valve plate 16 end flats and valve seat 18 end flat interference fit; The upper and lower valve rod hole interference fit of the upper valve rod 17 on described valve plate 16 and lower valve rod 15 and described valve seat 18; Described upper valve rod 20 and lower valve rod 15 pass Upper shaft sleeve 17 and Lower shaft sleeve 14 cooperates with valve seat 18; Described valve plate 16 adopts the hollow-core construction integral casting forming; Thrust-bearing 13 cooperates with the bearing support of lower valve rod 15 afterbodys, and O type circle 12 is packed in the O type ring recess of valve body 19 afterbodys, tail-hood 11 by tail-hood bolt 10 be fixed on the valve body afterbody and and the seamless cooperation in thrust-bearing 13 planes; Upper gland packing 21 passes upper valve rod 20 packs in the step hole on valve body 19 tops, and sliding bearing 24 is contained on the step of upper valve rod 20, and upper sealing gland 22 is fixed on valve body 19 tops by upper sealing gland bolt 23.

Described valve plate 16 cylindricals adopt spherical polishing, are arch bridge type structure.

Six square toes of described upper valve rod 17 cooperate with the hexagonal hole of valve plate 16; In described valve plate 16 and lower valve rod 15 matching holes step is set, can limits lower valve rod 15 to top offset.

In Upper shaft sleeve 17 and Lower shaft sleeve 14 were packed the axis hole of valve body 19 in the utility model, Upper shaft sleeve 17 and Lower shaft sleeve 14 and valve body 19 interference fit can prevent Upper shaft sleeve 17 and Lower shaft sleeve 14 displacements; Valve body 19 and valve seat 18 are assembly parts, and valve seat 18 uses Lord305AB glue to cement on the valve body 19, with vulcanization of rubber same effect; Valve plate 16 cylindricals cooperate with valve seat 18 endoporus, and valve plate 16 cylindricals adopt the spherical polishing design, effectively reduce open and close torque, and valve plate 16 end flats and valve seat 18 end flat interference fit produce seal pressure, form the first sealing; Upper valve rod 20 and lower valve rod 15 pass Upper shaft sleeve 17, Lower shaft sleeve 14 and valve seat 18 and cooperate with valve plate 16; The valve rod hole interference fit of upper valve rod 17 and lower valve rod 15 and valve seat 18 forms the second sealing; Six square toes of upper valve rod 17 cooperate with the hexagonal hole of valve plate 16, need not in valve plate 16 and upper valve rod 20 and lower valve rod 15 borings, and are without any impact, safe on valve plate 16 and upper valve rod 20 and lower valve rod 15 intensity; In valve plate 16 and lower valve rod 15 matching holes step is arranged, can limit lower valve rod 15 to top offset; Valve plate 16 adopts the hollow-core construction integral casting forming, and valve plate 16 has very little displacement when being subjected to high pressure, also prevents because displacement produces the impact on valve seat 18; Thrust-bearing 13 cooperates with the bearing support of lower valve rod 15 afterbodys, can reduce because the friction factor that valve plate 16 gravity produce reduces open and close torque; O type circle 12 is packed in the O type ring recess of valve body 19 afterbodys, tail-hood 11 by tail-hood bolt 10 be fixed on the valve body afterbody and and the seamless cooperation in thrust-bearing 13 planes, the compression of O type circle, formation seals, and can prevent that the valve afterbody from leaking outside simultaneously; Upper gland packing 21 passes upper valve rod 20 and packs in the step hole of valve body 19, sliding bearing 24 is contained on the step of upper valve rod 20, upper sealing gland 22 is fixed on valve body 19 tops by upper sealing gland bolt 23, compress simultaneously upper gland packing 21, make upper gland packing 21 and valve body 19 step holes and upper valve rod 20 cylindricals produce seal pressure, sealing (three seals) in the formation; Sliding bearing 24 adopt wear-resisting with material and on food-grade lubricant oil is arranged, can prevent that upper valve rod 20 from directly contacting with upper sealing gland 22, the reduction friction factor alleviates the valve opening and closing moment of torsion; The step hole of upper sealing gland 22 can prevent from producing top offset when upper valve rod 20 is subjected to interior pressure, realizes the anti-effect that flies out.

Claims

1. the hollow valve plate centre-pivoted butterfly valve of heavy caliber band is characterized in that comprising: valve body; In the upper and lower axis hole of described valve body, be respectively charged into Upper shaft sleeve and Lower shaft sleeve; Described valve body and valve seat are assembly parts, and valve seat adopts glue to cement on the valve body; The valve plate cylindrical cooperates with described valve seat endoporus, valve plate end flat and valve seat end flat interference fit; The upper and lower valve rod hole interference fit of the upper valve rod on described valve plate and lower valve rod and described valve seat; Described upper valve rod and lower valve rod pass Upper shaft sleeve and Lower shaft sleeve cooperates with valve seat; Described valve plate adopts the hollow-core construction integral casting forming; Thrust-bearing cooperates with the bearing support of lower valve rod afterbody, and O type circle is packed in the O type ring recess of valve body afterbody, tail-hood by tail-hood be bolted to the valve body afterbody and and the seamless cooperation in thrust-bearing plane; Upper gland packing passes upper valve rod packs in the step hole on valve body top, and sliding bearing is contained on the step of upper valve rod, and upper sealing gland is bolted to valve body top by upper sealing gland.

2. the hollow valve plate centre-pivoted butterfly valve of heavy caliber band according to claim 1 is characterized in that: described valve plate cylindrical adopts spherical polishing, is arch bridge type structure.

3. the hollow valve plate centre-pivoted butterfly valve of heavy caliber band according to claim 1, it is characterized in that: six square toes of described upper valve rod cooperate with the hexagonal hole of valve plate; In described valve plate and the lower valve rod matching hole step is set, can limits lower valve rod to top offset.