CN207569257U - A kind of low speed top load top-pressure mechanism and the forced seal ball valve of formation - Google Patents

Abstract

A kind of low speed top load top-pressure mechanism and the forced seal ball valve of formation, belong to forced seal valve field.Include the active runner and member of translational of screw thread engagement, roller mechanism be equipped between active runner and member of translational, it is characterised in that：The roller mechanism includes multiple rollers with a plurality of parallel annular groove（16）, multiple rollers（16）Close arrangement between each other, and multiple rollers（16）It is engaged simultaneously with active runner and member of translational.The utility model is using the structure for being abound with roller, the stud and member of translational of stud gear are using the screw thread for having same-handed lift angle, and roller is using the groove structure of no helix angle, adjacent roller arranges along helix generate difference in height in the axial direction, it will not lead to the mutual intrusion of annular groove tooth and movement interference between adjacent roller because of the presence of wedge angle, so as to be reduced valve volume, it is compact-sized to fully meet low speed, the use demand of top load.

Description

A kind of low speed top load top-pressure mechanism and the forced seal ball valve of formation

Technical field

A kind of low speed top load top-pressure mechanism and the forced seal ball valve of formation, belong to forced seal valve field.

Background technology

In field of fluid control, particularly fluid switch control and close the harsh field of tightness requirement, it is desirable that valve Door can the generation pressure drop as small as possible in the state of straight-through, and be capable of providing the pressure not influenced by pipeline pressure medium Torque seals, in the prior art, the conventional lift rod-type forced seal ball valve that forced seal valve represents the most, although the structure Can realize valve it is contactless with valve seat during switch is whole most of, without friction, but be not truly realized no friction. In addition, present applicant proposed a kind of completely new forced seal ball-valve structure, Patent No. in 2016 201610355492.5 the structure realizes real friction free technical purpose.

On the basis of the forced seal ball valve CN105921150A of above-mentioned utility model, it is proposed that a kind of cycle roller top Press mechanism since the distance that roller is jacked up in flap top pressure is only the running clearance of valve ball, plays the spiral of forced seal Top-pressure mechanism is realized that the force of sliding friction generated when being rotated between two screw threads is consumed by the thread fitting between stud gear and flap Most valve operation torques, machinery driving efficiency is relatively low, valve operation torque is larger.Moreover, the rolling in above structure For column during rotation and revolution, roller needs redirect realization cycle, so, in active runner or the engagement spiral shell of member of translational Need to set on line by roller reverse rotation track cut flat with mouth and synchronous spacing top is convex, reduce engagement essence to a certain extent Degree, produces the transmission efficiency of top-pressure mechanism certain influence.In addition, in order to be realized more under limited valve ball volume Big load, it is necessary to increase the quantity of roller, that is, increase the engagement area of roller, but the solution that existing structure provides It is and imperfect.

Invention content

Technical problem to be solved in the utility model is：Overcome the deficiencies of the prior art and provide one kind can realize it is low Rotating speed, a kind of low speed top load top-pressure mechanism of top load and the forced seal ball valve of formation.

Technical solution is used by the utility model solves its technical problem：A kind of low speed top load top-pressure mechanism, packet The active runner and member of translational of screw thread engagement are included, roller mechanism is equipped between active runner and member of translational, feature exists In：The roller mechanism includes multiple rollers with a plurality of parallel annular groove, and multiple rollers are closely arranged, and more between each other A roller engages simultaneously with active runner and member of translational.

The utility model uses the structure removed retainer and be abound with roller, under heavy load operating mode, in order to more Roller is arranged on ground, improves bearing capacity, and at the same time, the stud and member of translational of stud gear, which use, same-handed lift angle Screw thread, and roller is using the groove structure of no helix angle, the difference lies in screw thread and annular groove thread form do not include wedge angle. The crest portion of annular groove thread form is without wedge angle instead has the cylinder of one fixed width.Similarly, the stud peace of stud gear Moving the crest of the form of thread of component also without wedge angle instead has the cylinder of one fixed width.In the situation that roller is abound with Under, roller is engaged with the screw thread of stud gear and member of translational, therefore adjacent roller certainly will produce in the axial direction along helix arrangement Raw difference in height, when annular groove crest cylinder width is more than above-mentioned difference in height, the contact surface between adjacent roller will be still crest Cylinder, similar to the cylinder for being abound with roller bearing and being in contact, without because wedge angle presence and lead to annular groove between adjacent roller The mutual intrusion of tooth and movement interference.Carrying is provided so as to make the roller with annular groove that the mode being abound with still may be used.This The structure of sample so that the translation motion of member of translational is opposite at a slow speed, and under operating mode of the load for heavy duty, it can reach very good Good effect, and valve volume is reduced, the use demand of low speed, top load is fully met, and not to the sheet of equipment Body product impacts, compact-sized, more efficient.

The crest of the annular groove of multiple rollers is cylindrical surface, and the active runner carries the stud tooth of stud for end face Wheel, the stud of stud gear are equipped with the stud screw thread with helix angle, the width number on the annular groove crest cylindrical surface of the roller Value is more than the stud thread pitch divided by the numerical value of the number of roller.

The width numerical value on the annular groove crest cylindrical surface of roller be more than the numerical value of the number of the thread pitch divided by roller from And it is crest cylindrical surface to ensure the position contacted between adjacent roller.

The parallel annular groove spaced set of multiple rollers, multiple rollers around active runner stud circumference helically Formula arranges, and the axial difference in height between two rollers of head and the tail is one times of screw pitch.

Around active runner shaft, helically formula arranges the screw thread constraint roller being engaged with, and therefore, adjacent two roller is deposited Axial difference in height between axial difference in height, two rollers of head and the tail is about one times of screw pitch.Between adjacent roller and along one times of spiral shell Two rollers of head and the tail away from arrangement are cylinder in the case that being abound with contact surface, such structure, opposite in the action of flap jack-up For at a slow speed, and under operating mode of the load for heavy duty, very good effect can be reached, and be reduced valve volume.

The stud of the stud gear is external screw thread stud, and member of translational is equipped with corresponding internal thread boss, external screw thread Stud engages the internal thread boss of member of translational by roller mechanism annular groove.

The stud of the stud gear is internal thread stud, and external screw thread boss, external screw thread are correspondingly provided on member of translational Boss engages stud internal thread by roller mechanism annular groove.

The roller mechanism is equipped with the multigroup of inside and outside suit, multi-layer annular inside and outside coaxial arrangement on the active runner Stud, multigroup roller mechanism are separately mounted between the annular stud of adjacent two layers.

The screwed engagement projections of multilayer are correspondingly provided on the member of translational, between annular stud and engagement projections Roller mechanism is installed.

The forced seal ball valve that a kind of low speed top load top-pressure mechanism is formed, it is characterised in that：Further include valve body, valve seat, Valve rod and valve ball matrix are equipped with gear set transmission, the valve rod gear of gear set transmission between valve rod and valve ball matrix Mounted on the top of valve ball matrix and stem lower portion is connected, the low speed top load top-pressure mechanism is mounted on stud gear and valve Between valve；For valve rod gear by pinion gear connecting stud gear, stud gear is main turn wheel；Stud gear passes through roller mechanism Flap is connected, flap is member of translational, and flap is equipped with the limit that limitation flap is rotated with stud gear between valve ball matrix Revolve mechanism.

Sliding equipment is equipped between the stud gear and valve ball matrix, sliding equipment includes ball and ball slideway, Ball slideway is arranged on valve ball matrix and ball is abound in flap side, ball slideway, and ball side is in rolling contact described Stud gear inner face.

Between stud gear and valve ball matrix, it usually needs friction is reduced by the way of thrust bearing, promotes transmission Efficiency.In the case where heavy load low friction is required to take into account, the utility model employs annular and is abound with ball, similar to rolling The structure type of ballscrew, ball rotate with stud gear in the annular groove of coaxial arrangement and revolution and rotation occur simultaneously, ring Slot establishes one's own system to form self-loopa, and antifriction and supporting effect are more preferable in the forced seal ball valve application of heavy load at a slow speed.

The stud gear inner face is equipped with the contact surface of the annular groove engaged with ball, annular groove and roller It is set for arc.

Ball is that curved line contacts with two adjacent faces, substantially increases the area of contact, equally heavily loaded at a slow speed Antifriction and supporting effect are more preferable in the forced seal ball valve application of lotus.

Compared with prior art, advantageous effect possessed by the utility model is：The utility model, which uses, removes retainer And the structure of roller is abound with, under heavy load operating mode, in order to more arrange roller, bearing capacity is improved, at the same time, The stud and member of translational of stud gear are using the screw thread for having same-handed lift angle, and roller is using the annular groove knot of no helix angle Structure, the difference lies in screw thread and annular groove thread form do not include wedge angle.The crest portion of annular groove thread form is without wedge angle, instead It is the cylinder for having one fixed width.Similarly, the crest of the form of thread of the stud and member of translational of stud gear takes also without wedge angle And instead of be the cylinder for having one fixed width.In the case where roller is abound with, roller and stud gear and the screw thread of member of translational Engagement, therefore adjacent roller certainly will generate difference in height along helix arrangement in the axial direction, when annular groove crest cylinder width is more than upper When stating difference in height, contact surface between adjacent roller by be still crest cylinder, similar to the column for being abound with roller bearing and being in contact Face leads to mutually intrusion and the movement interference of annular groove tooth between adjacent roller without the presence because of wedge angle.So as to make to carry The roller of annular groove still may be used the mode being abound with and provide carrying.Such structure so that the translation motion phase of member of translational To at a slow speed, and under operating mode of the load for heavy duty, very good effect can be reached, and be reduced valve volume, it is complete The use demand of full up foot low speed, top load, and volume of equipment itself is not impacted, it is compact-sized, it is more efficient.

Description of the drawings

Fig. 1 is the installation relation schematic diagram of a kind of low speed top load top-pressure mechanism and valve body.

Fig. 2 is ball schematic view of the mounting position.

Fig. 3 is stud gear structure schematic diagram.

Fig. 4 is the part A partial enlarged view of Fig. 3.

Fig. 5 installation relation schematic diagrames between adjacent roller.

Fig. 6 is the part B partial enlarged view of Fig. 5.

Fig. 7 is the connection relationship diagram of stud gear and roller.

Fig. 8 is forced seal ball-valve structure explosion diagram.

Wherein, 1, valve body 2, bonnet gasket 3, valve seat 4, valve body bolt 5, valve ball matrix 501, ball slideway 6, spiral shell Stud wheel pressure ring 7, stud gear 701, stud screw thread 702, screw thread top surface 8, flap 9, valve rod gear 10, pinion gear 11, Upper cover 12, valve rod upper cover 13, nut 14, pinion gear gland 15, valve rod 16, roller 1601, ball crest 17, ball.

Specific embodiment

Fig. 1 ~ 8 are the most preferred embodiments of the utility model, and 1 ~ 8 pair of the utility model is done furtherly below in conjunction with the accompanying drawings It is bright.

Embodiment 1

With reference to attached drawing 1 ~ 8：A kind of low speed top load top-pressure mechanism includes the active runner and member of translational of screw thread engagement, Roller mechanism is equipped between active runner and member of translational, roller mechanism includes multiple rollers with a plurality of parallel annular groove 16, the close arrangement, and multiple rollers 16 engage simultaneously with active runner and member of translational between each other of multiple rollers 16.

The crest of the annular groove of multiple rollers 16 is cylindrical surface, on the stud of stud gear 7 and member of translational and roller 16 The field of conjugate action is equipped with the stud screw thread 701 with helix angle, and the crest of its engagement projections is cylindrical surface.Multiple rollers 16 Parallel annular groove spaced set, around active runner shaft, helically formula arranges the screw thread constraint roller 16 being engaged with, adjacent Therefore there are axial difference in height for two rollers 16, and the axial difference in height between two rollers 16 is one times of screw pitch from beginning to end.

The stud of stud gear 7 is external screw thread stud, is correspondingly provided with internal thread boss on member of translational, external screw thread stud leads to Cross the internal thread boss of roller mechanism annular groove engagement member of translational.

The forced seal ball valve that a kind of low speed top load top-pressure mechanism is formed, further includes valve body 1, valve seat 3, valve rod and valve ball Matrix 5, is equipped with gear set transmission between valve rod and valve ball matrix 5, the valve rod gear of gear set transmission is mounted on valve The top of ball matrix 5 simultaneously connects stem lower portion, and low speed top load top-pressure mechanism is mounted on the stud gear 7 and flap of active runner Between 8；For valve rod gear 9 by 10 connecting stud gear 7 of pinion gear, stud gear 7 is main turn wheel；Stud gear 7 passes through rolling Column mechanism connects flap 8, and flap 8 is member of translational, and limitation flap 8 is equipped between flap 8 and valve ball matrix 5 with stud gear 7 The Xian Xuan mechanisms rotated together.

Sliding equipment is equipped between valve body 1 and valve ball matrix 5, sliding equipment includes ball 17 and ball slideway 501, ball Slideway 501 is arranged on valve ball matrix and ball 17 is abound in 8 side of flap, ball slideway 501, and 17 side of ball is in rolling contact 7 inner face of stud gear.Between stud gear 7 and valve ball matrix 5, it usually needs dropped by the way of thrust bearing Low friction promotes transmission efficiency.In the case where heavy load low friction is required to take into account, the utility model employs annular and is abound with The structure type of ball 17, structure type similar to ball-screw as shown in Fig. 2, ball 17 in the annular groove of coaxial arrangement with Stud gear 7 rotates and revolution and rotation occurs simultaneously, and annular groove, which establishes one's own system, to form self-loopa, and ball 17 is held with adjacent two Power face is curved line contact, substantially increases the area of contact, equally in the application of the forced seal ball valve of heavy load at a slow speed Antifriction and supporting effect are good.

Further, in order to increase the efficiency of ball 17, reduce friction, can be equipped with and rolling on 7 inner face of stud gear The annular groove that pearl 17 engages, the contact surface of annular groove and ball 17 are set for arc.

Under heavy load operating mode, in order to more arrange roller, bearing capacity is improved, the utility model, which uses, to be removed Retainer and the structure for being abound with roller 16.Similarly, the screw thread in the screw thread and flap 8 on the stud of stud gear 7 all uses There is the screw thread of same-handed lift angle, and roller 16, using the groove structure of no helix angle, the difference lies in screw thread and annular grooves Thread form does not include wedge angle.As shown in figures 1-8：The crest portion of annular groove thread form is without wedge angle instead has one fixed width Cylinder.Similarly, stud and the crest of the flap form of thread also without wedge angle instead have the cylinder of one fixed width. In the case that roller is abound with, roller is engaged with stud gear and flap screw thread, therefore adjacent roller is arranged in the axial direction along helix Cloth certainly will generate difference in height, and when annular groove crest cylinder width is more than above-mentioned difference in height, the contact surface between adjacent roller will still The cylinder of crest, similar to being abound with cylinder that roller bearing is in contact as shown in Figure 6,7, without because wedge angle presence and Lead to the mutual intrusion of annular groove tooth and movement interference between adjacent roller.It is abound with so as to which the roller with annular groove be made still to may be used Mode carrying is provided.Given in attached drawing between adjacent roller 16 and along one times of screw pitch arrangement two rollers 16 of head and the tail full Contact surface is the situation of cylinder in the case of cloth.Such structure, it is opposite at a slow speed in the action of flap jack-up, and load is heavy duty Operating mode under, very good effect can be reached, and be reduced valve volume.

Embodiment 2

The stud of stud gear 7 is internal thread stud, is correspondingly provided with external screw thread boss on member of translational, external screw thread boss leads to Cross the inner wall that roller mechanism is threadedly coupled internal thread stud.Other settings are same as Example 1 with operation principle.

Embodiment 3

Another solution of severe duty is coped with, multi-turn roller is coaxially arranged between flap 8 and stud gear 7 16 and helicitic texture, carrying is made further to be promoted, the roller of more layers can also be sequentially arranged.Roller mechanism is equipped with inside and outside suit It is multigroup, on the end face of stud gear 7 simultaneously setting inside and outside multi-layer annular stud, multigroup roller mechanism is separately mounted to adjacent Between two layers of annular stud.

Can also, be correspondingly provided with the screwed engagement projections of multilayer on member of translational, annular stud and engagement projections it Between roller mechanism is installed.Other settings are identical with embodiment 1 or embodiment 2 with operation principle.

The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of variation.But it is every without departing from the content of the technical scheme of the utility model, the technology according to the utility model is real Any simple modification, equivalent variations and the remodeling that confrontation above example is made still fall within the guarantor of technical solutions of the utility model Protect range.

Claims (10)

1. a kind of low speed top load top-pressure mechanism includes the active runner and member of translational of screw thread engagement, in active runner peace It moves between component equipped with roller mechanism, it is characterised in that：The roller mechanism includes multiple rollings with a plurality of parallel annular groove Column（16）, multiple rollers（16）Close arrangement between each other, and multiple rollers（16）It is nibbled simultaneously with active runner and member of translational It closes.

2. a kind of low speed top load top-pressure mechanism according to claim 1, it is characterised in that：Multiple rollers（16） Annular groove crest for cylindrical surface, the active runner carries the stud gear of stud for end face（7）, stud gear（7）Spiral shell Column is equipped with the stud screw thread with helix angle（701）, the roller（16）The width numerical value on annular groove crest cylindrical surface be more than The stud screw thread（701）Screw pitch divided by roller（16）Number numerical value.

3. according to a kind of any low speed top load top-pressure mechanism of claims 1 or 2, it is characterised in that：Described is multiple Roller（16）Parallel annular groove spaced set, multiple rollers（16）It is first around the stud circumference helically formula arrangement of active runner Two rollers of tail（16）Between axial difference in height be one times of screw pitch.

4. a kind of low speed top load top-pressure mechanism according to claim 2, it is characterised in that：The stud gear（7） Stud for external screw thread stud, member of translational is equipped with corresponding internal thread boss, and external screw thread stud is nibbled by roller mechanism annular groove Close the internal thread boss of member of translational.

5. a kind of low speed top load top-pressure mechanism according to claim 2, it is characterised in that：The stud gear（7） Stud for internal thread stud, be correspondingly provided with external screw thread boss on member of translational, external screw thread boss is nibbled by roller mechanism annular groove Close stud internal thread.

6. a kind of low speed top load top-pressure mechanism according to claim 1, it is characterised in that：The roller mechanism is equipped with Inside and outside suit it is multigroup, multi-layer annular stud inside and outside coaxial arrangement on the active runner, multigroup roller mechanism installs respectively Between adjacent two layers annular stud.

7. a kind of low speed top load top-pressure mechanism according to claim 6, it is characterised in that：It is correspondingly provided on member of translational The screwed engagement projections of multilayer, roller mechanism is installed between annular stud and engagement projections.

8. the forced seal ball valve that a kind of low speed top load top-pressure mechanism according to claim 1 is formed, it is characterised in that： Further include valve body（1）, valve seat（3）, valve rod and valve ball matrix（5）, valve rod and valve ball matrix（5）Between be equipped with gear set driver Structure, the valve rod gear of gear set transmission are mounted on valve ball matrix（5）Top and connect stem lower portion, the low speed is high Load top-pressure mechanism is mounted on stud gear（7）With flap（8）Between；Valve rod gear（9）Pass through pinion gear（10）Connecting stud Gear（7）, stud gear（7）For main turn wheel；Stud gear（7）Flap is connected by roller mechanism（8）, flap（8）It is flat Move component, flap（8）With valve ball matrix（5）Between be equipped with limitation flap（8）With stud gear（7）The limit rotation machine rotated together Structure.

9. the forced seal ball valve that a kind of low speed top load top-pressure mechanism according to claim 8 is formed, it is characterised in that： The stud gear（7）With valve ball matrix（5）Between be equipped with sliding equipment, sliding equipment include ball（17）And ball slideway （501）, ball slideway（501）It is arranged on valve ball matrix（5）Close to flap（8）Side, ball slideway（501）Inside it is abound with ball （17）, ball（17）Side is in rolling contact the stud gear（7）Inner face.

10. the forced seal ball valve that a kind of low speed top load top-pressure mechanism according to claim 8 is formed, feature exist In：The stud gear（7）Inner face is equipped with and ball（17）The annular groove of engagement, annular groove and roller（17）'s Contact surface is set for arc.