CN2660248Y

CN2660248Y - Preventer for dripping of condensed water from shaft tube of butterfly valve

Info

Publication number: CN2660248Y
Application number: CN 200320101319
Authority: CN
Inventors: 何灿宏
Original assignee: BINGXIN VALVE IND CO Ltd
Current assignee: Promotion Valve Co Ltd
Priority date: 2003-10-16
Filing date: 2003-10-16
Publication date: 2004-12-01
Anticipated expiration: 2013-10-16

Abstract

The utility model provides a butterfly-gate axle tube device for preventing cold condensation dripping. A rubber ring and a matched valve disc are arranged on the internal peripheral edge of a valve base; an axle tube extends from the top of the valve base including a duct of intermediate diameter in the medium and lower section, a duct of large diameter in the upper section, as well as a bushing and an O-shaped ring; and a relative center hole is arranged for the axle tube penetrating the valve base, the rubber ring and the valve disc. The intermediate duct of the axle tube is larger than the diameter of a valve axle and also deeply penetrates the valve base to form a ring-shaped chamber between the valve axle and the intermediate duct, thus preventing the pipeline flow transferred from the valve axle to the axle tube in low temperature and avoiding cold condensation water on the surface of the axle tube, which is in line with the operation environmental standard such as dust-free room.

Description

The butterfly valve central siphon prevents the condensing drip device

Technical field

The utility model relates to a kind of butterfly valve central siphon and prevents the condensing drip device, refers to that especially a kind of butterfly valve central siphon of cry-fluid line that is applicable to prevents the condensing drip device.

Background technique

Butterfly valve has more advantages, particularly size than gate valve, ball valve, plug valve etc. in installing bigger, and weight is lighter, and it is less to take up space, and low price.

In existing butterfly valve 10 structures as shown in Figure 1, be one rubbery toroidal ring 12 and a valve disc 13 that matches to be set at valve seat 11 inner circumference edges, and a central siphon 17 that contains hollow duct 14 and lining thereof 15 and O shape ring 16 is up extended on valve seat 11 tops, down penetrate the relative center hole of valve seat 11, rubbery toroidal ring 12 and valve disc 13 for valve shaft 18, by operating handle 19 and fit angle positioning plate 191, with the rotation angle of control valve shaft 18 and valve disc 13.

In cry-fluid line system at aspects such as dust free rooms, pipeline 101,102 and valve seat 11 peripheries must be coated cold insulation material 103, cause condensing drip to avoid contacting ambient air.

But the cryogen in the pipeline 101,102 continues contacting metal valve disc 13, so its low temperature conducts to central siphon 17 via valve disc 13, valve shaft 18 and the duct 14 that matches, so that the condensing drip phenomenons can take place on central siphon 17 surfaces, does not meet the operating environment standard of dust free room.And central siphon 17 surfaces of butterfly valve 10 have label and the specifications and models that identification is used, and do not allow to coat sealing.Even central siphon 17 will coat cold insulation material fully, then relatively more labor intensive, time and cost.

The model utility content

In order to overcome deficiency of the prior art, the purpose of this utility model, promptly providing a kind of butterfly valve central siphon to prevent the condensing drip device, it is applicable to the cry-fluid line system of aspects such as dust free room, and central siphon needn't coat cold insulation material, can avoid the central siphon surface that condensing drip takes place, realistic use needs, and exempts cost of material, manpower and time that central siphon coats sealing.

For reaching above-mentioned purpose, the butterfly valve central siphon that the utility model provides prevents the condensing drip device, wherein, butterfly valve is provided with a rubbery toroidal ring and a valve disc that matches at the valve seat inner circumference edge, and the valve seat top up extend one contain in the central siphon of duct, footpath, epimere duct, big footpath and lining thereof and O shape ring in the hypomere, the confession valve shaft down penetrates the relative center hole of valve seat, rubbery toroidal ring and valve disc; It is characterized in that: the duct, middle footpath of this central siphon is greater than the diameter of valve shaft, and down gos deep in the valve seat, valve shaft and duct, middle footpath is separated by between the two constitutes an annular space.

In possible embodiments, the inner circumference edge near valve seat is goed deep in duct, footpath in this, to connect the default path center hole of valve seat.And inner each the default collar flange of the center hole at rubbery toroidal ring two ends, closely to connect valve shaft.

By said structure, the utility model butterfly valve is applicable to the cry-fluid line system of aspects such as dust free room, and its central siphon needn't coat cold insulation material, saves cost of material, manpower and time, can avoid the central siphon surface that condensing drip takes place, and realistic use needs.

Description of drawings

The 1st figure is the sectional view of existing butterfly valve installment state;

The 2nd figure is the stereogram of the utility model embodiment butterfly valve;

The 3rd figure is the three-dimensional exploded view of Fig. 2; And

The 4th figure is the amplification view of Fig. 2.

Embodiment

Relevant the utility model is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof are enumerated possible embodiments now and cooperated the drawing explanation, so that global design is more clear.

At first, see also Fig. 2, the utility model butterfly valve 20 valve bodies consist essentially of integrated valve seat 30 and central siphon 40, at the inner circumference edge of valve seat 30 rubbery toroidal ring 50 and a valve disc 60 that matches is set, further place winding one valve shaft 70 from top to bottom, and but its upper end bar portion's 72 same windings handle 19 shown in Figure 1 is controlled valve shaft 70 and valve disc 60 angles to rotate.

Please consult Fig. 2,3,4 simultaneously, the clamping ring portion 31 that has a trapezoidal cross-section at the central inner circumference edge of valve seat 30, clamping ditch portion 51 with combination rubbery toroidal ring 50, and both upper and lower end are preset the

path center hole

32,33,52,53 that communicates respectively, further aim at the center hole 62 of valve disc 60 central belled parts 61.

Up extend a central siphon 40 that contains upper end flange 41 on valve seat 30 tops, for winding angular positioning plate 191 shown in Figure 1.And the one-body molded

lug

34,35 that goes out to contain slotted hole in both sides, supply the bolt of line flange to place.This central siphon 40 central authorities' systems are established duct 43, footpath during hypomere communicates among duct, the big footpath of an epimere 42 and, to be communicated with the center hole 32 of valve seat 30.In preferred embodiment, duct, middle footpath 43 makes its center hole 32 have only a bit of degree of depth deeply near clamping ring portion 31 inner circumference edges of valve seat 30.Non-metallic material lining 46 and O shape ring 47 then is set in the duct, the big footpath of the epimere of valve seat 30 42, cooperates valve shaft 70, and on top concave step surface 45 and valve shaft 70 and clasp 73 thereof, a baffle plate 48 is set with close pivot joint.

Lining 46, O shape ring 47 that present embodiment valve shaft 70 down passes duct, the big footpath of epimere 42 reach duct 43, footpath in the middle hypomere, further down penetrate the

center hole

32,33,52,53,62 of valve seat 30, rubbery toroidal ring 50 and valve disc 60, and the polygonal axostylus axostyle 71 of valve shaft 70 engages the polygonal hole 63 of valve disc 60.And 52,53 inner each default collar flange 54,55 of two center holes up and down of rubbery toroidal ring 50, closely to connect the outer periphery of valve shaft 70.

As shown in Figure 4 in butterfly valve 20 structures, the duct, middle footpath 43 of central siphon 40 is obviously greater than the diameters of valve shaft 70, and gos deep in the valve seat 30, valve shaft 70 and duct, middle footpath 43 is separated by between the two constitutes the roomy annular space 44 of enough distances.When therefore butterfly valve 20 is used in the cry-fluid line system, need only coat cold insulation material at valve seat 30 and pipeline, fluid conducts in the low temperature of valve disc 60 and valve shaft 70 and is then separated by roomy annular space 44, can prevent that central siphon 40 surfaces from producing condensing drip.

Comprehensive the above, the utility model butterfly valve is applicable to the cry-fluid line system of aspects such as dust free room, its central siphon needn't coat cold insulation material, saves cost of material, manpower and time, can avoid the central siphon surface that condensing drip takes place, realistic use needs.

Claims

1. a butterfly valve central siphon prevents the condensing drip device, be one rubbery toroidal ring and a valve disc that matches to be set at the valve seat inner circumference edge, and the valve seat top up extend one contain in the central siphon of duct, footpath, epimere duct, big footpath and lining thereof and O shape ring in the hypomere, the confession valve shaft down penetrates the relative center hole of valve seat, rubbery toroidal ring and valve disc; It is characterized in that: the duct, middle footpath of this central siphon is greater than the diameter of valve shaft, and down gos deep in the valve seat, valve shaft and duct, middle footpath is separated by between the two constitutes an annular space.

2. butterfly valve central siphon according to claim 1 prevents the condensing drip device, it is characterized in that, the inner circumference edge near valve seat is goed deep in duct, footpath in this, to connect the default path center hole of valve seat.

3. butterfly valve central siphon according to claim 1 prevents the condensing drip device, it is characterized in that, inner each the default collar flange of the center hole at these rubbery toroidal ring two ends is closely to connect valve shaft.