CN2563373Y

CN2563373Y - Conveniently dismantling sand and mud proof two way sealed three eccentric butterfly valve

Info

Publication number: CN2563373Y
Application number: CN 02276942
Authority: CN
Inventors: 张长宗; 宋杰豪
Original assignee: HUNAN PUMP VALVE MANUFACTORY CO Ltd
Current assignee: HUNAN PUMP VALVE MANUFACTORY CO Ltd
Priority date: 2002-07-24
Filing date: 2002-07-24
Publication date: 2003-07-30
Anticipated expiration: 2012-07-24

Abstract

The utility model relates to a conveniently dismantling sand and mud proof two way sealed three eccentric butterfly valve and belongs to the cutting device technical field with closed elements arranged on a pivot; a butterfly plate of the valve and a sealed seat of an inner chamber of a valve body are in bevel fitting, thereby forming a soft-hard dual sealed surface with the prior gasket and achieving pressure compensation to realize the two-way zero leakage of the butterfly plate; in addition, a long shaft and a short shaft are provided with a plurality of sealed facilities in order to thoroughly prevent the valve from being permeated by sand and mud; a square tenon plug-in connecting mode is adopted between a valve shaft and the butterfly plate to transfer the moment of the valve more directly and clean and dismantle the parts very conveniently, which creates conditions for shortening maintenance time and improving working efficiency.

Description

Detachable type sand and mud proof two way sealed three eccentric butterfly valve

Technical field

The utility model belongs to a kind of shut-off means technical field that has pivoted closure member.

Background technique

Be communicated with at needs in the pipe-line system, by or select butterfly valve when regulating flow usually for use, be to come transmitting torque between its valve shaft and the valve plate by straight pin or taper pin, the situation of valve shaft or bad seals stuck by silt easily takes place in this class valve, and the dismounting valve shaft is very difficult, although the minority butterfly valve is equipped with anti-silt valve shaft sealing device, the fault point is many, maintenance difficult, often need time of overhauling long, thereby influenced the working efficiency of whole pipe-line system, improved maintenance cost.

The model utility content

The technical problems to be solved in the utility model is further to improve the sealability of butterfly valve, thereby makes it to realize that two-way zero leakage realizes anti-silt ability up hill and dale, and for convenience detach again, can shorten engineering time, increases work efficiency.

The utility model is to realize like this, it is the improvement that existing butterfly valve is carried out, this improved butterfly valve be detachable type sand and mud proof two way sealed three eccentric butterfly valve as shown in drawings, include valve body (1), butterfly plate (2), end cap (15) and drive unit (22), radially the minor axis at two ends (18) and major axis (21) are articulated in valve body (1) valve pocket butterfly plate wherein (2) by it, described minor axis (18) is connected an end with butterfly plate (2) the other end is fixed on the affixed with it end cap (15) in valve body (1) lower end by flat thrust-bearing (a 16) coaxial line, link to each other with butterfly plate (2) the in addition end of an end of major axis (21) then is coupling with the output shaft coaxial line of above-mentioned drive unit (22), this drive unit (22) is radially affixed with valve body (1) upper end by a connecting seat (20), and its improvements are:

A, described minor axis (18), major axis (21) have coaxial line side's tenon respectively with the end that described butterfly plate (2) is connected, correspondingly, described butterfly plate (2) and above-mentioned minor axis (18), major axis (21) joint have its corresponding size respectively with the mortise of the square tenon size coupling of the square tenon of minor axis (18) and major axis (21), promptly by square tenon and the minor axis (18) of its mortise by minor axis (18), major axis (21), major axis (21) portable type is joggle radially for this butterfly plate (2).

B, the corresponding butterfly plate (2) of described valve body (1) inner chamber edge has the ring sealing base (5) that it entad faces interior inclination, correspondingly, sealing seat (15) locates also to have along the limit chamfered edge edge with excellent sealing effect with the angular dimension coupling on sealing seat (5) inclined-plane in the corresponding valve body of described butterfly plate (2) (1) valve pocket, this angle of inclination is the 3rd off-centre, cemented carbide butterfly plate sealing surface (4) and high-quality abrasive rubber seal ring (3) are formed butterfly plate soft or hard double seal face, and the back side that the pressure fluid on the dull and stereotyped limit of butterfly plate can be guided into butterfly plate sealing surface (4) carries out pressure compensation, thereby realizes two-way zero leakage of butterfly plate sealing.

On the axis body between c, minor axis (18), major axis (21) and the valve body (1) by the lining outwardly respectively coaxial line be set with stuffing box gland (6), seal ring (7), bearing (8) and sealed letter cover (12) successively, be filled with Packing seat (9), outside framework oil seal (10), seal ring (11) and long bearing (14) successively outside reaching by the lining again on the axis body in the sealed letter cover (12) therein, and be filled with filler gland (13) between this long bearing (14) and the above-mentioned stuffing box gland.Can disposable above-mentioned outside framework oil seal (10) and seal ring (11) be pulled down by pulling down sealed letter cover (12).As mentioned above owing to be sealed and matched for the inclined-plane between the ring sealing base of this improved detachable type sand and mud proof two way sealed its butterfly plate of three eccentric butterfly valve of the present utility model and body cavity, have cemented carbide butterfly plate sealing surface and high-quality abrasive rubber again and form soft or hard double seal face, soft seal has pressure compensation, reveals function thereby have two-way zero.For making butterfly valve prevent that to greatest extent, up hill and dale soaking into of silt from providing condition, simultaneously again owing to make long and short valve shaft both can directly order its rotation for square mortise plug-connected type is connected to die between described long and short valve shaft and the butterfly plate to the butterfly plate carry-over moment, can dismantle easily again, thereby provide great convenience for cleaning or change shaft seal, also be to shorten engineering time simultaneously, increasing work efficiency provides possibility.And thereby long and short valve shaft itself has the anti-silt performance that multiple seal ring and seal ring have further improved this valve.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of the utility model detachable type sand and mud proof two way sealed three eccentric butterfly valve;

Fig. 2 be among Fig. 1 A-A to view;

Fig. 3 is the fundamental diagram of butterfly plate;

Fig. 4 is an A part enlarged view among Fig. 3.

In above Fig. 1～4,1-valve body wherein, 2-butterfly plate, the 3-seal ring, 4-butterfly plate sealing surface, 5-valve seal seat, the 6-stuffing box gland, 7-seal ring, 8-bearing, the 9-Packing seat, 10-outside framework oil seal, 11-seal ring, 12-sealed letter cover, 13-filler gland, 14-long bearing, the 15-end cap, the flat thrust-bearing of 16-, 17-thrust pad, 18-minor axis, 19-location gland, 20-connecting base, 21-major axis, 22-drive unit.

Embodiment

Referring to Fig. 1～4, in the anti-silt two way sealed three eccentric butterfly valve of this example detachable type, valve seal seat 5 is by the tilting and angled inwall that is fixed on valve body 1.The cemented carbide butterfly plate sealing surface 4 and the high-quality abrasive rubber butterfly plate seal ring 3 that are fixed on the butterfly plate 2 are formed soft or hard double seal face.Valve size two head bearings are identical with shaft seal structure, the square tenon of valve shaft directly with the square mortise carry-over moment of butterfly plate 2, valve shaft stuffing box gland 6 and sealed letter are housed in the axis hole of valve body from the inside to surface successively overlap 12.Between valve shaft stuffing box gland 6 and bearing, Yx RunddichtringO 7 is housed successively and minor axis holds 8.In sealed letter cover 12 and overlap on the valve shaft 21, Packing seat 9, outside framework oil seal 10 and A type V-arrangement composite intermediate layer combined sealing ring 11 are housed from inside to outside successively, be loaded on the filler gland 13 in the sealed letter cover 12, compress A type V-arrangement composite intermediate layer combined sealing ring 11, long bearing 14 is housed with the supporting valve shaft in the filler gland 13, with flat thrust-bearing 16 location valve shafts.The flat thrust-bearing 16 of minor axis end is positioned on the end cap 15 by thrust pad 17.The flat thrust-bearing 16 of longitudinal end is positioned on the valve body 1 big head flange by location gland 19, and the big head flange of valve body connects successively with connecting base 20, valve actuator 22.Valve actuator can be manual, electronic, surge, pneumatic or electric liquid drives.

The utility model is used at fluid circuit, especially can use in the silt waterpipe.The square tenon of major axis 21 and minor axis 18 directly and the bearing support transmitting torque of butterfly plate 2 has been cancelled the torque drive pin in traditional butterfly valve, and the dismounting valve shaft is extremely convenient.Only need pull down end cap 15 can fastening microcephaly's bearing filler.And the fastening of bottom-end bearing filler can directly be tightened from connecting base 20 square holes with Allen wrench.Clean, add or change outside framework oil seal 10 and A type V-arrangement compound seal interlayer associative ring 11, can pull out stuffing box cover 12 simply, can carry out.Yx RunddichtringO 7 generally need not to clean or change, even carrying out also available screw rod is screwed in the screw of valve shaft stuffing box gland 6 and can easily pulls out, the lip limit of Yx RunddichtringO 8 inwardly, under the pressure medium effect, open, silt water is shoveled out, stop it to enter the valve shaft bearing, provide first road to prevent the silt defence line, outside framework oil seal 10 is under stainless steel insert and pressure medium effect, lock ring serves as anti-silt defence line, second road on valve shaft, have better elasticity and good sealing effect after A type V-arrangement combination compound seal ring 11 compresses, its elastic element allows whole sealing configuration have from mending function.This three seals defence line has successfully stoped silt to enter the valve body bearing part.Tilting valve body sealing surface is difficult for silt sediment, and soft seal butterfly plate seal ring 3 is taken away silt when closing valve, and this double specific function has prevented that effectively primary seal is not disturbed by silt.Three eccentric structures as shown in Figure 2, first off-centre is sealing plane to the distance diagram e of valve shaft center line ₁, it has guaranteed the integrity of sealing surface, second off-centre is the valve shaft center line departs from the butterfly plate center line on the butterfly plate plane distance diagram e ₂, it has guaranteed that butterfly plate sealing surface and valve seal seat are separated from fully behind the valve wide open, has reduced about 20% seal friction moment.The 3rd off-centre be valve seal seat cone angle center line and pipe centerline depart from angle diagram e ₃Three eccentric structures close tighter and tighter by the butterfly plate sealing surface, and it has shortened the pass Valve travel, have shortened the seal ring skidding distance, have reduced friction torque, reach the effect of moment clutch, and have the tight more effect in pass more.Forward sealing (i.e. the sealing of big in-plane from the valve shaft to the butterfly plate) reaches zero and reveals; It is that pressure compensation is carried out at the back side of butterfly plate seal ring 3 that the soft or hard double seal can be guided to pressure medium the soft seal circle, can allow reverse sealing reach zero leakage, be proved to be respond well so valve has reached of the present utility model this improved detachable type sand and mud proof two way sealed three eccentric butterfly valve that two-way zero leakage constitutes thus through the trial-production of sample valve is on probation, reached designing requirement fully.

Claims

A kind of detachable type sand and mud proof two way sealed three eccentric butterfly valve, include valve body (1), butterfly plate (2), end cap (15) and drive unit (22), radially the minor axis at two ends (18) and major axis (21) are articulated in valve body (1) valve pocket butterfly plate wherein (2) by it, described minor axis (18) is connected an end with butterfly plate (2) the other end is fixed on the affixed with it end cap (15) in valve body (1) lower end by flat thrust-bearing (a 16) coaxial line, link to each other with butterfly plate (2) the other end of an end of major axis (21) then is coupling with the output shaft coaxial line of above-mentioned drive unit (22), this drive unit (22) is radially affixed with valve body (1) upper end by a connecting seat (20), it is characterized in that:

A, described minor axis (18), major axis (21) have coaxial line side's tenon respectively with the end that described butterfly plate (2) is connected, correspondingly, described butterfly plate (2) and above-mentioned minor axis (18), major axis (21) joint have its corresponding size respectively with the mortise of the square tenon size coupling of the square tenon of minor axis (18) and major axis (21), this butterfly plate (2) is promptly by square tenon and the minor axis (18) of its mortise by minor axis (18), major axis (21), major axis (21) portable type is joggle radially

B, the corresponding butterfly plate (2) of described valve body (1) inner chamber edge have the ring sealing base (5) that it entad faces interior inclination, correspondingly, sealing seat (15) locates also to have along the limit chamfered edge edge with excellent sealing effect with the angular dimension coupling on sealing seat (5) inclined-plane in the corresponding valve body of described butterfly plate (2) (1) valve pocket, in addition, also has the soft or hard double seal face of forming by butterfly plate sealing surface (4) and seal ring (3) that can be used for carrying out pressure compensation and realize two-way zero leakage

C, minor axis (18), on the axis body between major axis (21) and the valve body (1) by the lining outwardly respectively coaxial line be set with stuffing box gland (6) successively, seal ring (7), bearing (8) and sealed letter cover (12), reach the outer Packing seat (9) that is filled with successively by the lining again on the axis body in the sealed letter cover (12) therein, outside framework oil seal (10), seal ring (11) and long bearing (14), and be filled with filler gland (13) between this long bearing (14) and the above-mentioned sealed letter cover (12), make it can disposable outside framework oil seal (10) and the seal ring (11) pulled down by pulling down sealed letter cover (12).
2, detachable type sand and mud proof two way sealed three eccentric butterfly valve according to claim 1 is characterized in that described seal ring (11) is an A type V-arrangement composite intermediate layer combined sealing ring.