CN204061983U

CN204061983U - A kind of low moment of torsion fixes spherical ball valve without wearing and tearing forced seal

Info

Publication number: CN204061983U
Application number: CN201320897301.XU
Authority: CN
Inventors: 郝思宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2014-12-31
Anticipated expiration: 2023-12-31

Abstract

The utility model discloses a kind of ball valve, especially relate to a kind of low moment of torsion and fix spherical ball valve without wearing and tearing forced seal, it comprises valve body, auxiliary valve body, spheroid, valve seat, described auxiliary valve body fluid line cylindrical has worm and gear Driving plane cammingly forced seal device, wherein between worm gear and drive end face cam, flat key is installed, the keyway that slides axially of driven end face cam the rotary motion of drive end face cam is made to make axial linear movement along the feather key on auxiliary valve body fluid line, external produced pressure can be made to produce required seal pressure between the valve seat in valve pocket and spheroid by pressure delivery system and reach forced seal, and control worm and gear Driving plane cammingly forced seal device by automation control system and electric actuator is being opened, the operation program be associated in the process of pass, the corresponding material of structure choice of the present utility model is applicable to fluid and the environment of various harshness.

Description

A kind of low moment of torsion fixes spherical ball valve without wearing and tearing forced seal

Technical field

The utility model relates to a kind of valve, and particularly the low moment of torsion of one fixes spherical ball valve without wearing and tearing forced seal.

Background technique

Ball valve is a kind of valve of spheroid as closure member with runner, it is little that it has flow resistance, do not destroy flow profile, the advantages such as switch is convenient, but the wearing and tearing produced when switch between spheroid and valve seat are also current a great problems, it seriously have impact on the spreadable life of valve, the researcher of valve industry have also been made a large amount of work for this reason, one " the adjustable fixing ball valve of interior seal pressure " disclosed in Chinese invention patent ZL201010295018.0, although this invention is not when destroying flow profile, reasonably can regulate the seal pressure in ball valve body between seal element in outside, can play and reduce wear, prevent jam, noise is low, vibrate little, improve Safety performance, but still operate under the state having wearing and tearing during ball valve switch, regulative mode is more loaded down with trivial details, automaticity is lower, one " low moment of torsion is without wearing and tearing fixing ball valve " this invention and for example disclosed in Chinese invention patent CN201310323798 has major progress again in structure and usability, the rotation being in particular in when ball valve opens and closes is spheroid relative to valve seat is complete spinning movement in 90 ° under the state that specific pressure is very little, so be referred to as " low moment of torsion is without wearing and tearing fixing ball valve ", but a fly in the ointment is: seal pressure when closing between valve seat and spheroid is that the hydraulic energy of hydraulic system is converted to mechanical energy to realize, so leakage control point is many, particularly tiny leakage control difficulty is larger, need when using under high temperature and high pressure condition to increase much loaded down with trivial details device to ensure the service behaviour of hydraulic system within the scope of allowable temperature, manufacture cost is higher.

Summary of the invention

The purpose of this utility model is to overcome prior art deficiency, there is provided a kind of can mechanical energy is delivered to effectively the sealing surface of valve pocket interior spheroid and valve seat the external of fixing spherical ball valve and produce seal pressure, realize forced seal and low moment of torsion without wearing and tearing open and close.

In order to achieve the above object, the technical solution adopted in the utility model is such: a kind of low moment of torsion fixes spherical ball valve without wearing and tearing forced seal, it comprises valve body, auxiliary valve body, there is the spheroid of runner, valve seat, upper valve rod, lower valve rod, electric actuator, auxiliary valve body fluid line, it is characterized in that: the cylindrical of auxiliary valve body fluid line is provided with worm and gear Driving plane cammingly forced seal device, described worm and gear Driving plane cammingly forced seal device, it comprises: worm screw, worm gear, casing, drive end face cam, driven end face cam and feather key formed, its casing is fixedly mounted on the cylindrical of auxiliary valve body fluid line, between the inner circle of its worm gear and drive end face cam cylindrical, flat key is installed, the endoporus of its drive end face cam and the cylindrical of auxiliary valve body fluid line in dynamic join the driving being incorporated in worm gear under rotate, the gear teeth of its drive end face cam stretch out in outside casing and match with the gear teeth of the driven end face cam be installed on auxiliary valve body fluid line cylindrical, the endoporus of described driven end face cam and the cylindrical of auxiliary valve body fluid line match, the endoporus of driven end face cam also has the keyway that slides axially, its keyway that slides axially is axial sliding fit with being installed on the feather key put in the keyway of auxiliary valve body fluid line, driven end face cam is axial displacement under the driving of drive end face cam rotating force, fine-tuning nut in the inner side surface of described driven end face cam and pressure delivery system connects, described pressure delivery system, that the back of its valve seat has several the blind holes circumferentially arranged, spring is equipped with respectively in its blind hole, the outside of spring is equipped with the plunger matched with blind hole, plunger outer end and force transmitting board connect, the interior edge face of the outer side surface of force transmitting board round bar part thick with dowel bar again connects, its dowel bar coaxial on also there is thin round bar part, the cylindrical of its thin round bar part to be installed on static seal in the filling tube on auxiliary valve body put filler endoporus match, and compress filler by screw thread filler pressing sleeve, the thin round bar part of dowel bar and filler is made to be that motive sealing coordinates, the thin round bar part of its dowel bar stretches out in outside screw thread filler pressing sleeve, the inner side surface that the end of the thin round bar part of dowel bar is equipped with fine-tuning nut and driven end face cam connects.

Described low moment of torsion fixes spherical ball valve when opening state without wearing and tearing forced seal, drive end face cam wheel tooth crest is in the position of driven end face cam gear teeth bottom surface, its driven end face cam wheel tooth crest has the initiative again the position of end cam gear teeth bottom surface, time in off position, its drive end face cam gear teeth inclined-plane and driven end face cam gear teeth inclined-plane contact, drive end face cam wheel tooth crest and driven end face cam gear teeth bottom surface and driven end face cam wheel tooth crest and drive end face cam gear teeth bottom surface mutually deviate from.

Described spring can be cylindrically coiled spring and also can be butterfly spring.

In the described lower valve rod matched with the blind hole of spheroid lower end, there is a sphere supporting device.

Described sphere supporting device is in lower valve rod, be equipped with a sphere supports bar, a steel ball is equipped with between the interior edge face of sphere supports masthead portion and the blind hole of spheroid lower end, sphere supports bar it be coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with the female thread portion in lower valve rod, its round bar part matches with the endoporus of the sphere supports bar filler put in lower valve rod stuffing box, its sphere supports bar filler is that motive sealing coordinates with sphere supports bar under the impacting force of sphere supports bar screw thread filler pressing sleeve, its plate body part stretches out in outside sphere supports bar screw thread filler pressing sleeve.

Described auxiliary valve body same is circumferentially provided with number cover and controls pretension between spheroid and valve seat and compare pressure regulator.

Between described spheroid and valve seat, the controlling device of specific pressure is by ball seat specific pressure adjusting screw rod, adjusting screw rod filling tube, adjusting screw rod filler, adjusting screw rod screw thread filler pressing sleeve formed, described ball seat specific pressure adjusting screw rod has helical thread portion on coaxial, round bar part and plate body part, its helical thread portion matches with the female thread portion in adjusting screw rod filling tube again, the endoporus that cylindrical and the static seal of round bar part are installed on the adjusting screw rod filler put in the adjusting screw rod filling tube on auxiliary valve body matches, its adjusting screw rod filler is that motive sealing coordinates with the round bar part of ball seat specific pressure adjusting screw rod under the impacting force of adjusting screw rod screw thread filler pressing sleeve, its plate body part stretches out in outside adjusting screw rod screw thread filler pressing sleeve.

Sealing between described valve seat and valve body has pressure self-tightening sealing device and spiral thrust lever arrangement.

Between the cylindrical of described valve seat and the step hole of valve body and auxiliary valve body, the valve seat filler packing ring with part-conical is installed from inside to outside successively, there is valve seat filler and the valve seat Gland of partial hole class circular cone, what they were formed is pressure self-tightening sealing device, the outside of described valve seat Gland has number cover and circumferentially arranges the spiral thrust lever arrangement be arranged on auxiliary valve body, its spiral thrust lever arrangement is by spiral thrust bar, spiral thrust bar filling tube, spiral thrust bar filler, spiral thrust bar screw thread filler pressing sleeve formed, wherein spiral thrust bar coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with female thread portion in the spiral thrust bar filling tube be installed in static seal on auxiliary valve body again, its round bar part matches with the endoporus of the spiral thrust bar filler put in spiral thrust bar filling tube, and press down tight-spiral track bar filler in the impacting force of spiral thrust bar screw thread filler pressing sleeve and make the round bar part of spiral thrust bar be that motive sealing coordinates with spiral thrust bar filler, its plate body part is stretched out outside spiral thrust bar screw thread filler pressing sleeve.

The low moment of torsion of described one fixes spherical ball valve without wearing and tearing forced seal, and in its open and close process, the required sequentially-operating that is mutually related between electric actuator and worm and gear Driving plane cammingly forced seal device can adopt the automation control systems such as PLC to realize.

Filling tube in the same pressure delivery system circumferentially installed in static seal of described auxiliary valve body, between spheroid and valve seat specific pressure controlling device in adjusting screw rod filling tube, spiral thrust bar filling tube in spiral thrust lever arrangement can need for unequal number amount all claims interval to install according to the function of corresponding device.

The beneficial effects of the utility model are:

1, a kind of low moment of torsion of the utility model fixes spherical ball valve when open and close without wearing and tearing forced seal. between spheroid with valve seat in low friction without relative rotation under wearing and tearing, thoroughly changed conventional ball valve and transferred switch at sealing load backspin and the heavy wear that causes.

2, a kind of low moment of torsion of the utility model is fixed that the open and close torque of spherical ball valve is very low, wearing and tearing are very little without wearing and tearing forced seal, is occurred without jam phenomenon.

3, a kind of low moment of torsion of the utility model fixes the sealing between spherical ball valve spheroid and valve seat without wearing and tearing forced seal, worm and gear Driving plane cammingly forced seal device is adopted can effectively mechanical energy to be delivered to the sealing surface of valve pocket interior spheroid and valve seat and to produce seal pressure at ball valve body by pressure delivery system outward, worm and gear is mechanical transmission and has the tiny leakage that self-locking property prevents between spheroid and valve seat effectively, particularly at high temperature, high pressure, the metal hard-sealing used under the harsh working conditions such as high wearing and tearing is fixed spherical ball valve and is adopted the utility model, its sealability, Safety performance, operating characteristics, optimum efficiency can be reached working life and ensure reliably.

4, a kind of low moment of torsion of the utility model fixes the valve seat packing seal of spherical ball valve without wearing and tearing forced seal, adopt pressure energized seal structure to add spiral thrust bar and advance compression, the high-end sealing material such as high temperature resistant, high pressure, strong corruption, radiation is effectively utilized, guarantee sealing effect.

5, the spreadable life that a kind of low moment of torsion of the utility model fixes spherical ball valve without wearing and tearing forced seal is greatly improved, and is the working life of conventional ball valve many times, can saving resource to a great extent.

6, the structure that a kind of low moment of torsion of the utility model fixes spherical ball valve without wearing and tearing forced seal adopts PLC to control to be easier to realize automation and telecontrol.

7, to fix the structure of spherical ball valve without wearing and tearing forced seal simple, easily manufactured for a kind of low moment of torsion of the utility model, and component according to the suitable material manufacture of the Selecting parameter of flowing medium in pipe-line system, can be applicable to fluid and the environment of various harshness.

8, a kind of low moment of torsion of the utility model fix the flow channel shape of spherical ball valve without wearing and tearing forced seal can be identical with fluid line, without distortion bend, non-notch, do not destroy flow profile, absence of vortices district, noise low, vibrate little, require to reduce, so energy-saving effect highly significant to the power of motor in drive unit simultaneously.

Accompanying drawing explanation

Fig. 1 is that a kind of low moment of torsion provided by the utility model fixes the structural representation of the opening state of spherical ball valve without wearing and tearing forced seal.

Fig. 2 is that a kind of low moment of torsion provided by the utility model fixes the structural representation of the closed condition of spherical ball valve without wearing and tearing forced seal.

To be a kind of low moment of torsion provided by the utility model to fix between the spheroid of spherical ball valve, valve seat pretension than pressure regulator structural representation without wearing and tearing forced seal to Fig. 3.

Fig. 4 is that a kind of low moment of torsion provided by the utility model fixes the sphere supporting device structural representation of spherical ball valve without wearing and tearing forced seal.

Fig. 5 is that a kind of low moment of torsion provided by the utility model fixes driven end face cam schematic diagram in the worm and gear Driving plane cammingly forced seal device of spherical ball valve without wearing and tearing forced seal.

Fig. 6 is that a kind of low moment of torsion provided by the utility model fixes the unfolded drawing of the drive end face cam gear teeth in the worm and gear Driving plane cammingly forced seal device of spherical ball valve without wearing and tearing forced seal.

Fig. 7 is that a kind of low moment of torsion provided by the utility model fixes the unfolded drawing of the driven end face cam gear teeth in the worm and gear Driving plane cammingly forced seal device of spherical ball valve without wearing and tearing forced seal.

The schematic diagram of Fig. 8 to be a kind of low moment of torsion provided by the utility model without wearing and tearing forced seal fix dependency structure between drive end face cam and worm gear in the worm and gear Driving plane cammingly forced seal device of spherical ball valve, worm screw.

Fig. 9 is that a kind of low moment of torsion provided by the utility model fixes the valve seat filling pressure self-tightening sealing device of spherical ball valve and the structural representation of spiral thrust lever arrangement without wearing and tearing forced seal.

Figure 10 is that a kind of low moment of torsion provided by the utility model fixes without wearing and tearing forced seal the electric actuator and worm and gear Driving plane cammingly forced seal device and PLC automation control system connection diagram that are associated in spherical ball valve.

Be labeled as in figure: 1. valve body, 2. auxiliary valve body, 3. spheroid, 4. valve seat, 5. spring, 6. plunger, 7. force transmitting board, 8. dowel bar, 9. filling tube, 10. filler, 11. screw thread filler pressing sleeves, 12. driven end face cams, 13. feather keys, 14. drive end face cams, 15. worm gears, 16. worm screws, 17. casings, 18. upper valve rods, 19. lower valve rods, 20. ball seat specific pressure adjusting screw rods, 21. adjusting screw rod filling tubes, 22. adjusting screw rod fillers, 23. adjusting screw rod screw thread filler pressing sleeves, 24. steel balls, 25. sphere supports bars, 26. sphere supports bar fillers, 27. sphere supports bar screw thread filler pressing sleeves, 28. slide axially keyway, 29. valve seat filler packing rings, 30. valve seat fillers, 31. valve seat Glands, 32. spiral thrust bars, 33. spiral thrust bar filling tubes, 34. spiral thrust bar fillers, 35. spiral thrust bar screw thread filler pressing sleeves, 36. electric actuator, 37. worm and gear Driving plane cammingly forced seal devices, 38.PLC automation control system, 39. drive end face cam gear teeth bottom surfaces, 40. drive end face cam gear teeth inclined-planes, 41. drive end face cam wheel tooth crest, 42. fine-tuning nuts, 43. auxiliary valve body fluid lines, 44. driven end face cam gear teeth bottom surfaces, 45. driven end face cam gear teeth inclined-planes, 46. driven end face cam wheel tooth crest, 47. keyways, 48. flat keys.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

As Fig. 1, Fig. 5, Fig. 6, Fig. 7, the low moment of torsion of one shown in Fig. 8 fixes spherical ball valve without wearing and tearing forced seal, it comprises valve body 1, the outside of valve body 1 is that static seal is provided with auxiliary valve body 2, the lumen of valve body 1 is equipped with the spheroid 3 with fluid passage, spheroid 3 is connected with upper valve rod 18, spheroid 3 and lower valve rod 19 coordinate in dynamic, the outside of spheroid 3 is provided with valve seat 4, there is a pressure delivery system in the outside of its valve seat 4, mechanical pressure can be delivered to the sealing surface of valve pocket interior spheroid 3 and valve seat 4 and produce seal pressure outward at ball valve body by its pressure delivery system effectively, described pressure delivery system is: the back of valve seat 4 has several the blind holes circumferentially arranged, spring 5 is equipped with respectively in its blind hole, the outside of spring 5 is equipped with the plunger 6 matched with blind hole, plunger 6 outer end and force transmitting board 7 connect, the outside of force transmitting board 7 connects with the thick round bar part of the dowel bar 8 of several circumferentially axially-aligned again, its dowel bar 8 coaxial on also there is thin round bar part, its thin round bar part and number cover circumference axially-aligned and to be installed in static seal in the filling tube 9 on auxiliary valve body 2 sidewall put filler 10 endoporus match, and rotatably compress filler 10 by screw thread filler pressing sleeve 11, the thin bar part of dowel bar 8 and filler 10 are coordinated in motive sealing, the thin round bar part of its dowel bar 8 stretches out in outside screw thread filler pressing sleeve 11, the end of the thin round bar part of dowel bar 8 is equipped with fine-tuning nut 42, described fine-tuning nut 42 connects with the inner side surface of the driven end face cam 12 in the worm and gear Driving plane cammingly forced seal device 37 be installed on auxiliary valve body fluid line 43 cylindrical, described worm and gear Driving plane cammingly forced seal device 37 comprises: worm gear 15, worm screw 16, casing 17, drive end face cam 14, driven end face cam 12, the formations such as flat key 48 and feather key 13, its casing 17 is fixedly mounted on the cylindrical of auxiliary valve body fluid line 43, between the endoporus of its worm gear 15 and the cylindrical of drive end face cam 14, flat key 48 is installed, the endoporus of its drive end face cam 14 and the cylindrical of auxiliary valve body fluid line 43 coordinate in dynamic, drive end face cam 14 gear teeth stretch out in outside casing 17, the gear teeth of drive end face cam 14 match with the gear teeth of the driven end face cam 12 be installed on auxiliary valve body fluid passage cylindrical 43, it is axial sliding fit with being installed on the feather key 13 put in the keyway 47 of auxiliary valve body fluid line 43 cylindrical that the endoporus of described driven end face cam 12 has the keyway 28 that slides axially, the low moment of torsion of described one fixes spherical ball valve when opening state without wearing and tearing forced seal, drive end face cam top 41 is in the position of driven end face cam bottom surface 44, the fault offset state that the is in amount of deformation of spring 5 is less, its plunger 6, the position of force transmitting board 7 and dowel bar 8 is all at initial position, seal pressure between spheroid 3 with valve seat 4 only considers when designing not to be separated required pretension specific pressure when fully open position each other, the utility model is done when switch all to rotate under very little seal pressure between 90 ° of spheroids 3 rotated and valve seat 4, so be called low moment of torsion without wearing and tearing, described spring 5 can be cylindrically coiled spring and also can be butterfly spring.

As shown in Figure 2, a kind of low moment of torsion of the utility model fixes closedown and the seal process of spherical ball valve without wearing and tearing forced seal, the first step be upper valve rod 18 and the spheroid 3 being attached thereto band under the effect of electric actuator 36 by enable possition towards closing direction half-twist, the sealing surface of spheroid 3 and the sealing surface of valve seat 4 are in mutual corresponding sealing station this moment, second step is that in worm and gear Driving plane cammingly forced seal device 37, worm screw 16 drives worm gear 15 and drive end face cam 14 to rotate on auxiliary valve body fluid line 43, its drive end face cam wheel tooth crest 41 makes swing offset along driven end face cam gear teeth bottom surface 44, when drive end face cam gear teeth inclined-plane 40 reach swing offset is made on driven end face cam gear teeth inclined-plane 45 time, endoporus due to the driven end face cam 12 matched with auxiliary valve body fluid line 43 has one to slide axially keyway 28, its slide axially keyway 28 and feather key 13 of putting in being installed on auxiliary valve body fluid line 43 keyway 47 match, so the rotating force of its drive end face cam 14 is converted to end thrust by driven end face cam 12, under this thrust, driven end face cam 12 inwardly makes axial direct linear displacement along feather key 13, the pressure pushing pressure delivery system that its axial direct linear displacement produces, outer for the ball valve body pressure produced is delivered to the valve seat 4 in valve pocket by pressure delivery system, reach forced seal with regard to the seal pressure needed for generation between valve seat 4 and spheroid 3 this moment.

As shown in Figure 3, number cover spheroid is installed between the outside of described force transmitting board 7 and auxiliary valve body 2 and compares pressure regulator with valve seat, it is by ball seat specific pressure adjusting screw rod 20, adjusting screw rod filling tube 21, adjusting screw rod filler 22 screw thread filler pressing sleeve 23 formed, the inner of its ball seat specific pressure adjusting screw rod 20 and the outer side surface of force transmitting board 7 connect, described ball seat specific pressure adjusting screw rod 20 has helical thread portion on coaxial, round bar part and plate body part, its helical thread portion screws with the internal thread part phase-splitting in adjusting screw rod filling tube 21 again, cylindrical and the static seal of round bar part are installed on adjusting screw rod filler 22 endoporus put in the adjusting screw rod filling tube 21 on auxiliary valve body 2 and match, and coordinate in motive sealing under the impacting force of adjusting screw rod screw thread filler pressing sleeve 23, its plate body part stretches out in outside the sidewall of auxiliary valve body 2, its predominant use regulates between spheroid 3 and valve seat 4 to have certain pretightening force, under any working environment, ensure that spheroid 3 and valve seat 4 recline, avoid producing breach and causing slagging scorification in eddy current and valve pocket, as worm and gear Driving plane cammingly forced seal device 37 and pressure delivery system break down time, also there is hand-operated forced sealing function.

As shown in Figure 4, sphere supports controlling device is in lower valve rod 19, be equipped with a sphere supports bar 25, a steel ball 24 is equipped with between sphere supports bar 25 and the blind hole of spheroid 3 lower end, described sphere supports bar 25 it be coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with the female thread portion in lower valve rod 19 again, its round bar part matches with the endoporus of the sphere supports bar filler 26 put in the stuffing box of lower valve rod 19, and coordinate in motive sealing under the impacting force of sphere supports bar screw thread filler pressing sleeve 27, its plate body part stretches out in outside the lower end surface of sphere supports bar screw thread filler pressing sleeve 27, its function supports by sphere supports bar 25 positional deviation regulating spheroid 3 and valve seat 4, what the deadweight overcoming spheroid 3 produced valve seat 4 sealing surface lays particular stress on wearing and tearing.

As shown in Figure 9, be provided with successively from inside to outside between the cylindrical of described valve seat 4 and the step hole of valve body 1: the valve seat filler packing ring 29 with part-conical, there is valve seat filler 30 and the valve seat Gland 31 of partial hole class circular cone, the mutual cooperation of above-mentioned part forms a pressure self-tightening sealing device, the outside of described valve seat Gland 31 is installed on number on auxiliary valve body 2 in addition and overlaps the spiral thrust lever arrangement circumferentially arranged, described spiral thrust lever arrangement is by spiral thrust bar 32, spiral thrust bar filling tube 33, spiral thrust bar filler 34, spiral thrust bar screw thread filler pressing sleeve 35 formed, its spiral thrust bar 32 it be coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with female thread portion in the spiral thrust bar filling tube 33 be installed in static seal on auxiliary valve body 2 again, its round bar part matches with the endoporus of the spiral thrust bar filler 34 put in the stuffing box of spiral thrust bar filling tube 33, and be that motive sealing coordinates by the compression filler of spiral thrust bar screw thread filler pressing sleeve 35, its plate body part stretches out in outside spiral thrust bar screw thread filler pressing sleeve 35, valve seat filler 30 adopts said structure can make to realize reliable sealing between valve seat 4 and valve body 1, particularly outstanding behaviours is at high temperature high voltage resistant, strong corruption, long lifetives etc., high-end filler effectively can be applied to ball valve.

As shown in Figure 10, a kind of low moment of torsion of the utility model fixes spherical ball valve without wearing and tearing forced seal, its automation control system 38 have employed the electronics such as PLC, appliance component to control electric actuator 36 associated therewith and worm and gear Driving plane cammingly forced seal device 37, is easier to realize Automated condtrol and completes open and close operation program.

" connecting " described in the files such as specification one word can be interpreted as between component " contact " or " connect and touch ", described " interior " " outward " is also had to be relative concept, when relating to the axial direction of Same Part, with spheroid 4 for benchmark, with towards or be " interior " close to the direction of spheroid 4 or approximated position, otherwise be " outward ".

Described filling tube 9, adjusting screw rod filling tube 21, spiral thrust bar filling tube 33 circumferentially can need the balanced also interval in unequal number amount to be installed on auxiliary valve body 2 according to the function of corresponding device same.

Claims

1. a low moment of torsion fixes spherical ball valve without wearing and tearing forced seal, it comprises valve body (1), auxiliary valve body (2), there is the spheroid (3) of runner, valve seat (4), upper valve rod (18), lower valve rod (19), electric actuator (36), auxiliary valve body fluid line (43), it is characterized in that: the cylindrical of auxiliary valve body fluid line (43) is provided with worm and gear Driving plane cammingly forced seal device (37), described worm and gear Driving plane cammingly forced seal device (37), it comprises: worm screw (16), worm gear (15), casing (17), drive end face cam (14), driven end face cam (12) and feather key (13) formed as critical part, its casing (17) is fixedly mounted on the cylindrical of auxiliary valve body fluid line (43), between the inner circle of its worm gear (15) and drive end face cam (14) cylindrical, flat key (48) is installed, the endoporus of its drive end face cam (14) and the cylindrical of auxiliary valve body fluid line (43) in dynamic join the driving being incorporated in worm gear (15) under rotate, the gear teeth of its drive end face cam (14) stretch out in outside casing (17) and match with the gear teeth of the driven end face cam (12) be installed on auxiliary valve body fluid line (43) cylindrical, the endoporus of described driven end face cam (12) and the cylindrical of auxiliary valve body fluid line (43) match, the endoporus of driven end face cam (12) also has the keyway that slides axially (28), the feather key (13) that its keyway that slides axially (28) and being installed on is put in the keyway (47) of auxiliary valve body fluid line (43) is in axial sliding fit, driven end face cam (12) is axial displacement under the driving of drive end face cam (14) rotating force, fine-tuning nut (42) in the inner side surface of described driven end face cam (12) and pressure delivery system connects, described pressure delivery system, that the back of its valve seat (4) has several the blind holes circumferentially arranged, spring (5) is equipped with respectively in its blind hole, the outside of spring (5) is equipped with the plunger (6) matched with blind hole, plunger (6) outer end and force transmitting board (7) connect, the interior edge face of the outer side surface of force transmitting board (7) round bar part thick with dowel bar (8) again connects, its dowel bar (8) coaxial on also there is thin round bar part, cylindrical and the static seal of its thin round bar part to be installed in the filling tube (9) on auxiliary valve body (2) put filler (10) endoporus match, and compress filler (10) by screw thread filler pressing sleeve (11), the thin round bar part of dowel bar (8) and filler (10) are coordinated in motive sealing, the thin round bar part of its dowel bar (8) stretches out in outside screw thread filler pressing sleeve (11), the inner side surface that the end of the thin round bar part of dowel bar (8) is equipped with fine-tuning nut (42) and driven end face cam (12) connects, described lower valve rod has a sphere supporting device in (19), the same of described auxiliary valve body (2) is circumferentially provided with the controlling device that number cover controls pretension specific pressure between spheroid (3) and valve seat (4), the sealing of the valve seat filler (30) between described valve seat (4) and valve body (1) is realized by pressure self-tightening sealing device and spiral thrust lever arrangement.

2. the low moment of torsion of one according to claim 1 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: described low moment of torsion fixes spherical ball valve when opening state without wearing and tearing forced seal, drive end face cam wheel tooth crest (41) is in the position of driven end face cam gear teeth bottom surface (44), its driven end face cam wheel tooth crest (46) has the initiative again the position of end cam gear teeth bottom surface (39), time in off position, its drive end face cam gear teeth inclined-plane (40) and driven end face cam gear teeth inclined-plane (45) contact, drive end face cam wheel tooth crest (41) and driven end face cam gear teeth bottom surface (44) and driven end face cam take turns tooth crest (46) and drive end face cam gear teeth bottom surface (39) deviates from mutually.

3. the low moment of torsion of one according to claim 1 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: the same of described auxiliary valve body (2) is circumferentially provided with the controlling device that number cover controls pretension specific pressure between spheroid (3) and valve seat (4), and it comprises: between spheroid (3) and valve seat (4), the controlling device of pretension specific pressure is made up of ball seat specific pressure adjusting screw rod (20), adjusting screw rod filling tube (21), adjusting screw rod filler (22), adjusting screw rod screw thread filler pressing sleeve (23) etc.

4. the low moment of torsion of one according to claim 3 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: described ball seat specific pressure adjusting screw rod (20) has helical thread portion on coaxial, round bar part and plate body part, its helical thread portion matches with the female thread portion in adjusting screw rod filling tube (21) again, the endoporus that cylindrical and the static seal of round bar part are installed on the adjusting screw rod filler (22) put in the adjusting screw rod filling tube (21) on auxiliary valve body (2) matches, its adjusting screw rod filler (22) is that motive sealing coordinates with the round bar part of ball seat specific pressure adjusting screw rod (20) under the impacting force of adjusting screw rod screw thread filler pressing sleeve (23), its plate body part stretches out in outside adjusting screw rod screw thread filler pressing sleeve (23).

5. the low moment of torsion of one according to claim 1 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: have a sphere supporting device in the lower valve rod (19) matched with spheroid (3) lower end blind hole, it comprises: the formations such as lower valve rod (19), steel ball (24), sphere supports bar (25), sphere supports bar filler (26), sphere supports bar screw thread filler pressing sleeve (27).

6. the low moment of torsion of one according to claim 5 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: described sphere supporting device is in lower valve rod (19), be equipped with a sphere supports bar (25), a steel ball (24) is equipped with between the interior edge face of sphere supports bar (25) top and spheroid (3) lower end blind hole, sphere supports bar (25) it be coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with the female thread portion in lower valve rod (19), its round bar part matches with sphere supports bar filler (26) endoporus put in lower valve rod stuffing box, its sphere supports bar filler (26) coordinates in motive sealing with sphere supports bar (25) under the impacting force of sphere supports bar screw thread filler pressing sleeve (27), its plate body part stretches out in outside sphere supports bar screw thread filler pressing sleeve (27).

7. the low moment of torsion of one according to claim 1 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: the sealing between valve seat (4) and valve body (2) has pressure self-tightening sealing device and spiral thrust lever arrangement, and it comprises: the formation such as valve seat filler packing ring (29), valve seat filler (30), valve seat Gland (31) and spiral thrust bar (32), spiral thrust bar filling tube (33), spiral thrust bar filler (34), spiral thrust bar screw thread filler pressing sleeve (35).

8. the low moment of torsion of one according to claim 7 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: between the cylindrical of described valve seat (4) and the step hole of valve body (1) and auxiliary valve body (2), the valve seat filler packing ring (29) with part-conical is installed from inside to outside successively, there is valve seat filler (30) and the valve seat Gland (31) of partial hole class circular cone, what they were formed is pressure self-tightening sealing device, the outside of described valve seat Gland (31) has number cover and circumferentially arranges the spiral thrust lever arrangement be arranged on auxiliary valve body (2), its spiral thrust bar (32) coaxial on there is helical thread portion, round bar part and plate body part, its helical thread portion matches with female thread portion in the spiral thrust bar filling tube (33) be installed in static seal on auxiliary valve body (2) again, its round bar part matches with the endoporus of the spiral thrust bar filler (34) put in spiral thrust bar filling tube (33), and press down tight-spiral track bar filler (34) in the impacting force of spiral thrust bar screw thread filler pressing sleeve (35), the round bar part of spiral thrust bar (32) is coordinated in motive sealing with spiral thrust bar filler (34), its plate body part stretches out in outside spiral thrust bar screw thread filler pressing sleeve (35).

9. the low moment of torsion of one according to claim 1 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: the low moment of torsion of described one fixes spherical ball valve without wearing and tearing forced seal, in its open and close process, the required sequentially-operating that is mutually related between electric actuator (36) and worm and gear Driving plane cammingly forced seal device (37) can adopt the automation control systems such as PLC (38) to realize.

10. the low moment of torsion of one according to claim 1 or 7 or 9 fixes spherical ball valve without wearing and tearing forced seal, it is characterized in that: the filling tube (9) in the same pressure delivery system circumferentially installed in static seal of described auxiliary valve body (2), between spheroid (3) and valve seat (4) specific pressure controlling device in adjusting screw rod filling tube (21), spiral thrust bar filling tube (33) in spiral thrust lever arrangement can need for unequal number amount all claims interval to install according to the function of corresponding device.