CN203421188U

CN203421188U - Worm drive lever-type butterfly valve

Info

Publication number: CN203421188U
Application number: CN201320438331.4U
Authority: CN
Inventors: 周晓普
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2014-02-05
Anticipated expiration: 2023-07-23

Abstract

The utility model belongs to sealed valves for adjusting and intercepting flow of a medium in pipeline valves and discloses a worm drive lever-type butterfly valve. The worm drive lever-type butterfly valve is structurally formed by a valve body, a valve base, a valve rod, a butterfly plate, a worm drive device, a hand wheel and the like. A lever is additionally arranged between the valve rod and the butterfly plate, the middle of the lever is hinged to the connecting head formed by extending the butterfly plate, elastic elements ejecting each other are arranged between the front end of the lever and the butterfly plate, and the rear end of the lever is fixed to the valve rod. By means of the design of the lever type structure, rotating movement of the valve rod can be converted into linear lifting movement of the butterfly plate, so that mutually rotating abrasion and extrusion are prevented from being formed between the valve seat in the valve body and the butterfly plate, wear of the valve seat is reduced, seal performance of the butterfly valve is improved, and the service life of the butterfly valve is prolonged. Meanwhile, the rotating movement is converted into the linear movement, disengaging distance between the butterfly plate and the valve seat is effectively shortened, the opening and closing torque of the valve is reduced, and opening and closing operation saves more effects.

Description

Worm drive Lever type butterfly valve

Technical field

The utility model relates to the butterfly valve structure in a kind of pipeline valve, refers in particular to worm drive Lever type butterfly valve.

Background technique

Butterfly valve is a kind of pipeline valve that is widely used in carrying in the engineering systems such as oil, chemical industry, water power, plumbing, smelting, the energy various corrosivity, non-corrosive fluids medium, and it can be used for regulating and blocking flowing of medium.At present, the project organization of the soft sealing butterfly valve of domestic production mainly adopts center line and the design of two eccentric structure, as disclosed China Patent No. be 201120266051.0 " butterfly valve ", its motion mode is by the rotation of butterfly plate, to realize the keying function of valve, during keying the sealing surface of butterfly plate need to the valve seat extruding that mutually rubs, easily cause the prooving of valve seat, and then affect the working life of valve.And the spacing that butterfly plate departs from valve seat is completely larger, therefore the open and close torque of valve is also larger, operation is effort comparatively.

Summary of the invention

Goal of the invention of the present utility model is to overcome the defect of prior art and provides that a kind of rapid operation, sealing are reliable, the worm drive Lever type butterfly valve of long service life.

Goal of the invention of the present utility model realizes by following technical proposal:

A Lever type butterfly valve, comprises valve body, valve seat, butterfly plate, valve rod, worm gearing and handwheel, is also provided with lever between described butterfly plate and valve rod; The connecting head extending on described lever middle part and butterfly plate is articulated and connected; Between lever front end and butterfly plate, be provided with elastic element, the two ends of this elastic element respectively pushing tow are arranged in butterfly plate and the set spring groove of lever front end; Lever rear end is fixed on valve rod, and is subject to valve rod to drive rotation.

Described lever front end is also provided with adjusting bolt, and this adjusting bolt penetrates in the spring groove of lever front end, and makes pushing tow with the end of elastic element.

Described worm gearing comprises the casing being arranged on valve body, is provided with worm gear and the worm screw of the transmission of intermeshing in this casing; Described worm gear set is contained on valve rod, and and valve rod between form and be in transmission connection; Described worm screw one end is stretched out casing and is connected handwheel, on the bearing of worm screw the other end rotating support in casing.

Described worm gear outer peripheral surface is provided with a spacing breach, in described casing, be provided with spacing hole, in this spacing hole, be provided with stud bolt and connecting bolt, the interior rotary spacing that forms worm gear of spacing breach of worm gear is stretched in this stud bolt the inner, and the outer end of this connecting bolt is provided with helmet and seals.

Described worm gear end is provided with the outer direction board outside casing that is exposed at.

Between described worm screw one end and casing, be provided with worm screw axle sleeve, sliding bearing and flat thrust ball bearing are installed in this worm screw axle sleeve, described worm screw one end rotating support is on sliding bearing and flat thrust ball bearing, the end of worm screw one end is connected little round nut through sliding bearing with flat thrust ball bearing, and this little round nut is enclosed in casing by the end bracket enclosed being connected on casing again.

The described worm screw the other end and the rotation supporting structure of casing inner bearing are between the worm screw the other end and casing, to be provided with worm screw axle sleeve, sliding bearing and flat thrust ball bearing are installed in this worm screw axle sleeve, described worm screw the other end rotating support is on sliding bearing and flat thrust ball bearing, the end of the worm screw the other end is connected adjusting nut through sliding bearing with flat thrust ball bearing, and this adjusting nut is enclosed in casing by the end bracket enclosed being connected on casing again.

Described valve seat setting-in is arranged in the valve pocket of valve body, is provided with the gland of fixed valve base in valve body; The sealing surface that described butterfly plate contacts with valve seat is made as sphere.

Described valve rod lower end is pushed against on packing ring set in valve body, between this valve rod lower end and valve body, is also provided with Lower shaft sleeve, and this packing ring is enclosed in valve body by the end cap being connected on valve body; Described valve rod upper end is in transmission connection through the worm gear of valve body and worm gearing, between this valve rod upper end and valve body, is provided with Upper shaft sleeve, spacer ring, Packing seat and filler, and this Packing seat and filler are sealed by the hold-down grid being connected on valve body.

Described valve body two ends are equipped with flange plate, and valve body top is provided with middle flanged surface, and the casing of described worm gearing is connected in this on flanged surface.

Compared with prior art, the utility model is mainly to have additional lever between valve rod and butterfly plate, and the connecting head extending on this lever middle part and butterfly plate is done hinged, is provided with the elastic element of mutual pushing tow between lever front end and butterfly plate, and lever rear end is fixed on valve rod.By the design of above-mentioned this lever-type structure, rotatablely moving of valve rod can be converted to the Linear lifting motion of butterfly plate, thereby avoid forming and mutually rotating friction extruding between the valve seat in butterfly plate and valve body, reduce the prooving of valve seat, improve the sealability of butterfly valve, extend the working life of butterfly valve.Meanwhile, rotatablely move and be converted to straight line motion, also effectively shorten the disengaging spacing between butterfly plate and valve seat, reduce the open and close torque of valve, open and close operation also more laborsaving.

Accompanying drawing explanation

Fig. 1 is sectional structure schematic diagram of the present utility model.

Fig. 2 is A-A sectional view of Fig. 1.

Fig. 3 is the sectional structure schematic diagram of worm gearing.

Fig. 4 is B-B sectional view of Fig. 3.

Embodiment

Below in conjunction with above-mentioned accompanying drawing and adopt specific embodiment to be described in detail again the utility model.

As shown in Fig. 1 ~ Fig. 4, 1. hex head screw, 2. end cap, 3. "O"-ring, 4. packing ring, 5. Lower shaft sleeve, 6. valve rod, 7. valve body, 8. lever, 9. worm gearing, 91. casings, 92. case lids, 93. direction boards, 94. worm gears, 95. worm screws, 10. locating stud, 11. Upper shaft sleeves, 12. spacer rings, 13. Packing seats, 14. fillers, 15. hold-down grids, 16. socket head screws, flanged surface in 17., 18. flange plates, 19. connecting heads, 20. taper pins, 21. elastic elements, 22. spring seats, 23. adjusting bolts, 24. butterfly plates, 25. valve seats, 26. glands, 27. Cock screws, 28. adjusting nuts, 29. flat thrust ball bearings, 30. worm screw axle sleeves, 31. sliding bearings, 32. little round nuts, 33. flat keys, 34. flat gaskets, 35. handwheels, 36. stud bolts, 37. connecting bolts, 38. helmets, 39. spacing breach.

Worm drive Lever type butterfly valve, as shown in Figure 1, it belongs in pipeline valve for regulating and block the sealing valve of media flow, is mainly to consist of valve body 7, valve seat 25, valve rod 6, butterfly plate 24, worm gearing 9 and handwheel 35 etc.

Described valve body 7 is illustrated in figure 2 the bypass structure of cylindrical shape, at valve body two ends, is respectively equipped with water inlet port and water outlet port that level is communicated with, on this water-in and water-out port, is equipped with flange plate 18, for facilitating the connection of external pipe to connect; Valve body 7 tops are provided with middle flanged surface 17, install fixing for worm gearing 9.

In described valve body 7, there is valve pocket, valve seat groove is set in this valve pocket; Described valve seat 25 setting-ins are arranged in the valve seat groove of valve pocket, then the gland 26 being connected on valve body 7 by screw is done further fixing.

Described butterfly plate 24 is arranged in valve pocket, contacts and form sealing to open and close between this butterfly plate and valve seat 25, and the sealing surface of butterfly plate 24 is made as sphere; Described butterfly plate middle part is provided with upwardly extending connecting head 19, and this connecting head end is provided with attachment hole.

Described valve rod 6 is arranged on butterfly plate 24 1 sides, and this valve rod lower end pushes against mutually through Lower shaft sleeve 5 and packing ring 4 successively, and packing ring is arranged in valve body by end cap 2 sealings, and end cap is sealedly connected on valve body 7 bottom surfaces by "O"-ring 3 and hexagon head bolt 1; These valve rod 6 upper ends are fixed together with worm gearing 9 through Upper shaft sleeve 11, spacer ring 12, Packing seat 13, filler 14 and hold-down grid 15 successively, hold-down grid 15 is connected and fixed by socket head screw 16 and valve body 7, and Packing seat 13 and filler 14 are enclosed in valve body 7.

Between described valve rod 6 and butterfly plate 24, be provided with lever 8, between the attachment hole set with connecting head 19 ends on butterfly plate 24 of this lever middle part, be provided with locating stud 10 and be connected with hexagon nut, thus being articulated and connected between formation lever 8 middle parts and butterfly plate 24 connecting heads 19, between lever 8 front ends and butterfly plate 24, be provided with elastic element 21, the two ends of this elastic element respectively pushing tow are arranged in butterfly plate 24 and the set spring groove of lever 8 front ends, in the spring groove of lever front end, be also provided with spring seat 22, be subject to elastic element 21 pushing tows to make butterfly plate 24 there is the pre-thrust that can contact with valve seat 25 all the time, and lever 8 front ends are also provided with an adjusting bolt 23, this adjusting bolt penetrates in the spring groove of lever 8 front ends, and with the set spring seat 22 phase pushing tows in the end of elastic element 21, its effect is that rotation by adjusting bolt 23 is with the pre-thrust of adjustable elastic element 21, lever 8 rear ends are sleeved on valve rod 6 middle parts, and fix by connected realization of taper pin 20, can be subject to valve rod 6 to drive to form and rotate.

Described worm gearing 9 as shown in Figure 3, Figure 4, mainly comprise the casing 91 on the middle flanged surface 17 that is fastened on valve body 7, this casing upper end is provided with opening, and by opening, the worm gear being meshed 94 and worm screw 95 are packed in casing 91, the case lid 92 that opening is connected with hex head screw is done hermetically enclosed; Described worm gear 94 is connected to valve rod 6 upper ends by spline drived, between worm gear and casing 91, be provided with the "O"-ring sealing that rotates, the upper-end surface of worm gear 94 is connected by screw direction board 93, and this direction board is exposed at the case lid 92 of casing 91 upper ends outward outward so that check.

Described worm gear 94 outer peripheral surfaces are provided with the spacing breach 39 of a fan shape; and relevant position in casing 91 is provided with spacing hole; in this spacing hole, be provided with stud bolt 36 and connecting bolt 37; this stud bolt is subject to connecting bolt pushing tow that the inner is stretched in the spacing breach 39 of worm gear 94; thereby formed the rotary spacing of worm gear, and closed protective is made by the helmet 38 of rubber system in the outer end of connecting bolt 37.

Described worm screw 95 is horizontally set on worm gear 94 1 sides, expose through casing 91 these worm screw 95 one end, between it and casing, be provided with worm screw axle sleeve 30, sliding bearing 31 and flat thrust ball bearing 29 are installed in this worm screw axle sleeve, described worm screw 95 one end rotating supports are on sliding bearing 31 and flat thrust ball bearing 29, the end of worm screw 95 one end is connected roundlet nut 32 through sliding bearing 31 with flat thrust ball bearing 29, the end cap 2 that this little round nut is connected on casing 91 by hex head screw is again hermetically enclosed in casing, between end cap and casing 91, "O"-ring is all set between end cap 2 and worm screw 95 and forms sealing, meanwhile, the exposed junction of worm screw 95 is provided with by flat key 33 and makes the handwheel 35 being in transmission connection, and this handwheel is connected and fixed with flat gasket 34 and hex head screw, to prevent that handwheel 35 from coming off.

Between described worm screw 95 the other ends and casing 91, be also provided with worm screw axle sleeve 30, sliding bearing 31 and flat thrust ball bearing 29 are installed in this worm screw axle sleeve, described worm screw 95 the other end rotating supports are on sliding bearing 31 and flat thrust ball bearing 29, the end of worm screw 95 the other ends is connected adjusting nut 28 through sliding bearing 31 with flat thrust ball bearing 29, the end cap 2 that this adjusting nut is connected on casing 91 by hex head screw is again hermetically enclosed in casing, adjusting nut 28 is provided with Cock screw 27 with being connected and fixed between realization and worm screw 95, "O"-ring is set between end cap 2 and casing 91 and forms sealing.

Working method of the present utility model is: operation handwheel 35 rotates through worm screw 95, worm gear 94 transferring power, worm gear band ovable valve stem 6 rotates, through lever 8, rotatablely moving of valve rod 6 is converted to again to the Linear lifting motion of butterfly plate 24, thereby the sealing realizing between butterfly plate and valve seat 25 opens and closes, and between lever 8 and butterfly plate 24, set elastic element 21 can guarantee that the sealing between butterfly plate 24 and valve seat 25 is more reliable.

The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.

Claims

1. a worm drive Lever type butterfly valve, comprise valve body (7), valve seat (25), butterfly plate (24), valve rod (6), worm gearing (9) and handwheel (35), it is characterized in that being also provided with lever (8) between described butterfly plate (24) and valve rod (6); Described lever middle part is articulated and connected with the upper connecting head (19) extending of butterfly plate (24); Between lever (8) front end and butterfly plate (24), be provided with elastic element (21), the two ends of this elastic element respectively pushing tow are arranged in butterfly plate (24) and the set spring groove of lever (8) front end; It is upper that lever (8) rear end is fixed on valve rod (6), and be subject to valve rod to drive rotation.

2. worm drive Lever type butterfly valve according to claim 1, it is characterized in that described lever (8) front end is also provided with adjusting bolt (23), this adjusting bolt penetrates in the spring groove of lever (8) front end, and makes pushing tow with the end of elastic element (21).

3. worm drive Lever type butterfly valve according to claim 1, is characterized in that described worm gearing (9) comprises the casing (91) being arranged on valve body (7), is provided with worm gear (94) and the worm screw (95) of the transmission of intermeshing in this casing; It is upper that described worm gear (94) is sleeved on valve rod (6), and and valve rod between form and be in transmission connection; Described worm screw (95) one end is stretched out casing (91) and is connected handwheel (35), on the bearing of worm screw (95) the other end rotating support in casing (91).

4. worm drive Lever type butterfly valve according to claim 3, it is characterized in that described worm gear (94) outer peripheral surface is provided with a spacing breach (39), described casing is provided with spacing hole in (91), in this spacing hole, be provided with stud bolt (36) and connecting bolt (37), the interior rotary spacing that forms worm gear of spacing breach (39) of worm gear (94) is stretched in this stud bolt (36) the inner, and the outer end of this connecting bolt (37) is provided with helmet (38) and seals.

5. worm drive Lever type butterfly valve according to claim 3, is characterized in that described worm gear (94) end is provided with the outer outer direction board (93) of casing (91) that is exposed at.

6. worm drive Lever type butterfly valve according to claim 3, it is characterized in that being provided with worm screw axle sleeve (30) between described worm screw (95) one end and casing (91), sliding bearing (31) and flat thrust ball bearing (29) are installed in this worm screw axle sleeve, described worm screw (95) one end rotating support is on sliding bearing (31) and flat thrust ball bearing (29), the end of worm screw (95) one end is connected little round nut (32) through sliding bearing (31) with flat thrust ball bearing (29), this little round nut is hermetically enclosed in casing by the end cap (2) being connected on casing (91) again.

7. worm drive Lever type butterfly valve according to claim 3, it is characterized in that described worm screw (95) the other end and the rotation supporting structure of casing (91) inner bearing are to be provided with worm screw axle sleeve (30) between worm screw (95) the other end and casing (91), sliding bearing (31) and flat thrust ball bearing (29) are installed in this worm screw axle sleeve, described worm screw (95) the other end rotating support is on sliding bearing (31) and flat thrust ball bearing (29), the end of worm screw (95) the other end is connected adjusting nut (28) through sliding bearing (31) with flat thrust ball bearing (29), this adjusting nut is hermetically enclosed in casing by the end cap (2) being connected on casing (91) again.

8. worm drive Lever type butterfly valve according to claim 1, is characterized in that described valve seat (25) setting-in is arranged in the valve pocket of valve body (7), is provided with the gland (26) of fixed valve base in valve body; Described butterfly plate (24) is made as sphere with the sealing surface that valve seat (25) contacts.

9. worm drive Lever type butterfly valve according to claim 1, it is characterized in that described valve rod (6) lower end is pushed against on packing ring (4) set in valve body (7), between this valve rod (6) lower end and valve body (7), be also provided with Lower shaft sleeve (5), this packing ring (4) is enclosed in valve body by the end cap (2) being connected on valve body (7); Described valve rod (6) upper end is in transmission connection through valve body (7) and the worm gear (94) of worm gearing (9), between this valve rod (6) upper end and valve body (7), be provided with Upper shaft sleeve (11), spacer ring (12), Packing seat (13) and filler (14), this Packing seat (13) and filler (14) are sealed by the hold-down grid (15) being connected on valve body (7).

10. worm drive Lever type butterfly valve according to claim 1, it is characterized in that described valve body (7) two ends are equipped with flange plate (18), valve body (7) top is provided with middle flanged surface (17), and the casing (91) of described worm gearing (9) is connected on flanged surface in this (17).