CN207848428U - The adjustable shut-off valve of flow - Google Patents

Abstract

The utility model is related to a kind of adjustable shut-off valves of flow, including valve body, it is set to the valve deck of body top, and it is set to the valve casing at the top of valve deck, top is equipped with valve seat at fluid-through port, the upper end of valve seat is connected with valve rod, the lower end of valve seat is equipped with hemispherical flap, the outer sheath of valve seat is equipped with the sleeve being vertically arranged, the upper and lower side of sleeve is against valve deck respectively, on valve body at fluid-through port, it is uniformly provided with through-hole on the side wall of sleeve, the upper end of valve rod is upward through hollow cavity and extends in valve casing, the top of hollow cavity is rotatable to be equipped with rotation screwed pipe, valve rod is inserted in rotation screwed pipe and is threadedly coupled with rotation screwed pipe, rotation is equipped with hand wheel shaft in valve casing, hand wheel shaft is equipped with the hand wheel component with lock function, hand wheel shaft passes through transmission component and rotation screwed pipe linkage.The utility model provide a kind of destruction reduced to valve body, it is simple in structure, occupy little space, observe the adjustable shut-off valve of more intuitive flow.

Description

The adjustable shut-off valve of flow

Technical field

The utility model belongs to valve technology field more particularly to a kind of adjustable shut-off valve of flow.

Background technology

Shut-off valve is also pipe valve, is a kind of most popular valve, and why very popular it is, is due to being opened and closed Frictional force is small between primary sealing area in journey, relatively durable, and Lift is little, and manufacture is easy, easy to maintenance, is applicable not only to Mesolow, and it is suitable for high pressure.

Chinese patent (a kind of shut-off valve " CN201720031804.7 " with filter device), including valve body, inlet channel, Valve chamber is divided into uuper valve chamber and lower valve chamber by outlet flow, valve chamber, flap and the valve seat with flap sealing cooperation, the flap, Filter device is equipped in the lower valve chamber, the filter device includes filter plate, and the filter plate is located on valve seat and flap phase To lower face, the filter plate and valve base inner wall Elastic Sliding coordinate, and the end face of the filter plate is towards flap direction concave shaped At cambered surface, the bottom of the valve body is equipped with the opening for facilitating filter plate to install, and the opening is equipped with end cap, the lower valve chamber Bottom is equipped with screw plug close to the position of outlet flow.

But conventional shut-off valve often has the following defects：1) valve bodies do not have lock function, and the position of valve seat can not Locking, complicated integral structure, inconvenience handling；2) is unadjustable by the flow of the liquid of valve body, inconvenient；3) valve bodies Opening size observation is not intuitive enough, inconvenient for use.

Therefore, these problems are based on, provide a kind of destruction reduced to valve body, it is simple in structure, occupy little space, observe The adjustable shut-off valve of more intuitive flow, has important practical significance.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of destruction reduced to valve body, knot are provided Structure is simple, occupies little space, and observes the adjustable shut-off valve of more intuitive flow.

The utility model solves its technical problem and following technical scheme is taken to realize：

A kind of adjustable shut-off valve of flow, including valve body, be set to the valve deck of body top and be set to valve deck top The valve casing in portion, through the hollow cavity being equipped with up and down in the middle part of the valve deck, the valve body include be located on the flat axis of liquid into Liquid mouth, feed pathway, liquid outlet channel and liquid outlet are connected between the feed pathway and liquid outlet channel by fluid-through port；

Top is equipped with valve seat at the fluid-through port, and the upper end of the valve seat is connected with valve rod, and the lower end of the valve seat is equipped with Hemispherical flap, the outer sheath of the valve seat are equipped with the sleeve being vertically arranged, the upper and lower side of the sleeve be against respectively valve deck, On valve body at fluid-through port, and the lower end of the sleeve is welded with valve body, is uniformly provided with through-hole on the side wall of the sleeve, institute The upper end for stating valve rod is upward through hollow cavity and extends in valve casing, and the top of the hollow cavity is rotatable to be equipped with rotation spiral shell Pipe, the outer wall in the middle part of the valve rod are equipped with external thread section, the valve rod be inserted in rotation screwed pipe and with rotation screwed pipe screw thread Connection, the interior rotation of the valve casing are equipped with hand wheel shaft, and the hand wheel shaft is equipped with the hand wheel component with lock function, the handwheel Axis passes through transmission component and rotation screwed pipe linkage.

Further, the feed pathway is streamlined in S, and one end open direction of the feed pathway far from inlet is hung down Straight upward, the top of the one end of the liquid outlet channel far from liquid outlet is connected to body top surface, and lower openings direction is vertical Downwards.

Further, the hand wheel component includes that the handwheel being vertically connected with and flexible cylinder barrel, the flexible cylinder barrel present end Closed lower open state, uniform welding has the more cords being vertically arranged, the handwheel in the external wall of upper portion of the hand wheel shaft The upper end of axis is inserted into flexible cylinder barrel, and the lower ending opening end of the flexible cylinder barrel is equipped with and slides the slot being adapted to cord, The hand wheel shaft is located at the end in flexible cylinder barrel and is equipped with limiting plate, and the lower end that the size of the limiting plate is more than the cylinder barrel that stretches is opened The size at mouth end, and it is arranged with adjustable spring on the hand wheel shaft between the limiting plate and flexible cylinder barrel.

Further, the lower end of the hand wheel shaft is rotatablely connected by bearing and valve deck, the valve casing immediately below the handwheel On offer recessed cylindrical groove, offer on the valve casing below the cylindrical groove and opened for the cylindricality that passes through of cylinder barrel of stretching Mouthful, be also arranged with closing piece on the flexible cylinder barrel, the flexible cylinder barrel through closing piece and with closing piece Joint, the closing piece is in column Shape structure, and the limiting tooth being vertically arranged is uniformly provided on the outer wall of the closing piece, the closing piece is contained in cylindrical groove, institute The inner wall for stating cylindrical groove is equipped with the card slot being mutually clamped with limiting tooth.

Further, the transmission component includes driving gear and driven gear, the driving gear, driven gear difference It is assemblied in hand wheel shaft, rotates on screwed pipe, and the driving gear is meshed with driven gear, the rotation screwed pipe is logical with hollow cavity Bearing rotation connection is crossed, the rotation screwed pipe inner wall is equipped with internal thread.

Further, the upper end of the valve rod extends upward through valve casing and extends to above valve casing, outside the valve rod top At least one guided way being vertically arranged is equipped on rear side of wall, the valve casing is equipped with slides the guide groove being adapted to, institute with guided way It states and is vertically carved with graduation mark on the outer wall on valve rod top, the graduation mark is located at the top of external thread section.

Further, the flap is externally provided with the rubber layer that shape therewith matches, and the valve seat is column construction, and institute It states valve seat and is also equipped with rubber layer on the side wall of sleeve, sealing ring is additionally provided between the valve body and valve deck, the sleeve Upper end is against on sealing ring, and the valve rod runs through sealing ring, and bellows is also arranged on the valve rod above the sealing ring, described The upper end of bellows is welded with upper guide ring, and lower end is welded with lower guide ring, and the upper guide ring is welded with hollow cavity, under described The sidewall weld of guide ring and valve rod.

Further, it is locked by bolt between the valve body and valve deck, passes through bolt lock between the valve deck and valve casing It is fixed.

The advantages of the utility model and good effect are：

1. in the utility model, hand wheel shaft is rotated by transmission component drive rotation screwed pipe, when the rotating forward of rotation screwed pipe or instead When turning, valve rod can move up or down, then the position of regulating valve seat, to the aperture of control valve.

2. in the utility model, the through-hole being uniformly provided on the side wall of sleeve may not only be applied to the circulation of liquid, and Good filtration, the position being in by valve rod regulating valve seat, to realize the tune of valve body flow can be played to liquid Section, it is easy to operate, it is easy-to-use.

3. in the utility model, hand wheel shaft is equipped with the hand wheel component with lock function, when the handwheel group on hand wheel shaft When part is in the lock state, hand wheel shaft does not rotate, and then locks the position of valve seat, simple in structure, occupies little space.

4. in the utility model, feed pathway can both be such that droop loss reduces in S is streamlined, while can reduce flow velocity, subtract Destruction of the small pressure to valve body.

5. in the utility model, when closing piece is connected in cylindrical groove, hand wheel shaft can not rotate, at this time at hand wheel component In lock-out state, seating position is locked, when using external force to pull up handwheel closing piece is detached from from cylindrical groove completely, Hand wheel shaft rotation can be driven by rotating handwheel, hand wheel component is in the unlocked state at this time, can then realize the tune of seating position Section, locking and unlock are easy to operate, simple in structure.

6. in the utility model, the opening size of valve body flow, knot can be intuitively observed by observing exposed graduation mark Structure is simpler, observation is more illustrated.

7. in the utility model, rubber layer can be improved leakproofness between flap and valve body, reduce leakage, and extend valve The service life of valve.

Description of the drawings

The technical solution of the utility model is described in further detail below with reference to drawings and examples, still It should be known that these attached drawings only design for task of explanation, therefore not as the restriction of the scope of the utility model.In addition, Unless otherwise indicated, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to carry out to scale It draws.

Fig. 1 is the utility model structure diagram；

Fig. 2 is Fig. 1 along the faces A-A sectional view；

Fig. 3 is hand wheel component structural schematic diagram；

Fig. 4 is the longitudinal sectional drawing of Fig. 3；

Fig. 5 is the upward view of flexible cylinder barrel in Fig. 3.

In figure：1. valve body, 2. valve decks, 3. valve casings, 4. hollow cavities, 5. inlets, 6. feed pathways, 7. liquid outlet channels, 8. Liquid outlet, 9. fluid-through ports, 10. valve seats, 11. valve rods, 12. flaps, 13. sleeves, 14. through-holes, 15. rotation screwed pipes, 16. bolts, 17. external thread section, 18. hand wheel shafts, 19. handwheels, 20. flexible cylinder barrels, 21. cords, 22. slots, 23. limiting plates, 24. flexible bullets Spring, 25. cylindrical grooves, 26. closing pieces, 27. limiting tooths, 28. card slots, 29. driving gears, 30. driven gears, 31. graduation marks, 32. rubber layer, 33. sealing rings, 34. bellowss, guide ring, 36. times guide rings, 37. guided ways, 38 guide grooves on 35..

Specific implementation mode

Firstly, it is necessary to which explanation, illustrates the concrete structure, feature of the utility model by by way of example below With advantage etc., however what all descriptions were intended merely to illustrate, and should not be construed as forming the utility model and appoint What is limited.In addition, the arbitrary single technical characteristic for being described by or implying in each embodiment mentioned by this paper, or it is shown Or implicit arbitrary single technical characteristic in the drawings, still can continue between these technical characteristics (or its equivalent) into The arbitrary combination of row is deleted, to obtain more other embodiments of the utility model that may do not referred to directly herein. In addition, for the sake of simplifying drawing, same or like technical characteristic may be indicated only at one in the same figure.

In the description of the present invention, it should be understood that term " coaxial ", " bottom ", " one end ", " top ", " in The orientation of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than Indicate or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot It is construed as a limitation of the present invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral； It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

Fig. 1 is the utility model structure diagram；Fig. 2 is Fig. 1 along the faces A-A sectional view；Fig. 3 is hand wheel component structural representation Figure；Fig. 4 is the longitudinal sectional drawing of Fig. 3；Fig. 5 is the upward view of flexible cylinder barrel in Fig. 3.Just come specifically in conjunction with Fig. 1-Fig. 5 below Bright the utility model.

As shown in Figs. 1-5, the adjustable shut-off valve of a kind of flow, including valve body 1, be set to body top valve deck 2, with And it is set to the valve casing 3 at the top of valve deck, through the hollow cavity 4 being equipped with up and down, the valve body 1 includes at the valve deck 2 middle part Inlet 5, feed pathway 6, liquid outlet channel 7 on the flat axis of liquid and liquid outlet 8, the feed pathway 6 and liquid outlet channel 7 Between be connected by fluid-through port 9；

Top is equipped with valve seat 10 at the fluid-through port 9, and the upper end of the valve seat 10 is connected with valve rod 11, the valve seat 10 Lower end is equipped with hemispherical flap 12, and the outer sheath of the valve seat 10 is equipped with the sleeve 13 being vertically arranged, the sleeve 13 it is upper Lower end is against valve deck 2, on the valve body 1 at fluid-through port 9 respectively, and the lower end of the sleeve 13 is welded with valve body 1, the sleeve 13 Side wall on be uniformly provided with through-hole 14, the upper end of the valve rod 11 is upward through hollow cavity 4 and extends in valve casing 3, described The top of hollow cavity 4 is rotatable to be equipped with rotation screwed pipe 15, and the outer wall at 11 middle part of the valve rod is equipped with external thread section 17, institute It states valve rod 11 to be inserted in rotation screwed pipe 15 and be threadedly coupled with rotation screwed pipe 15, is rotated in the valve casing 3 and be equipped with hand wheel shaft 18, The hand wheel shaft 18 is equipped with the hand wheel component with lock function, and the hand wheel shaft 18 passes through transmission component and rotation screwed pipe 15 Linkage.

As an example, hand wheel shaft 18 drives rotation screwed pipe 15 to rotate by transmission component, due to rotating 15 rotating dress of screwed pipe Top assigned in hollow cavity 4, and valve rod 11 is inserted in rotation screwed pipe 15 and is threadedly coupled with rotation screwed pipe 15, when rotation screwed pipe When 15 forward or reverse, valve rod 11 can move up or down, then the position of regulating valve seat 10, make when valve rod 11 moves down Flap 12 on valve seat 10 when blocking fluid-through port 9, the liquid in feed pathway 6 can not enter back into liquid outlet channel 7, valve body 1 is closed, and when valve rod 11 moves up, flap 12 is separated with fluid-through port 9 therewith, and valve body 1 is in open state, by It is equipped with the sleeve 13 that is vertically arranged in the outer sheath of valve seat 10, and the upper and lower side of sleeve 13 is against valve deck 2, at fluid-through port 9 respectively Valve body 1 on, the through-hole 14 being uniformly provided on the side wall of sleeve 13 may not only be applied to the circulation of liquid, and can be to liquid Good filtration is played, the liquid in feed pathway 6 enters liquid outlet channel 7 by the through-hole 14 positioned at 10 lower section of valve seat It is interior, and positioned at the through-hole 14 of the top of valve seat 10 under the blocking of valve seat 10 can not circulating liquid, therefore can be adjusted by valve rod 11 The position that valve seat 10 is in adjusts the quantity of the through-hole 14 of negotiable liquid, to realize the adjusting of 1 flow of valve body, operation side Just, easy-to-use；In addition, since hand wheel shaft 18 is equipped with the hand wheel component with lock function, the handwheel on hand wheel shaft 18 When component is in the lock state, hand wheel shaft 18 does not rotate, and then locks the position of valve seat 10, simple in structure, occupied space It is small.

For further, it can also consider in the present invention, the feed pathway 6 is streamlined in S, the feed liquor Vertically upward, the top of the one end of the liquid outlet channel 7 far from liquid outlet 8 connects in one end open direction of the channel 6 far from inlet 5 1 top surface of valve body is passed to, lower openings direction is vertically downward.

Feed pathway 6 can both be such that droop loss reduces in S is streamlined, while can reduce flow velocity, reduce pressure to valve body Destroy, meanwhile, one end open direction of the feed pathway 6 far from inlet 5 vertically upward, liquid outlet channel 7 far from liquid outlet 8 one The top at end is connected to 1 top surface of valve body, and lower openings direction vertically downward, can also reduce destruction of the pressure to valve body.

For further, it can also consider in the present invention, the hand wheel component includes the handwheel being vertically connected with 19 with flexible cylinder barrel 20, the flexible cylinder barrel 20 is in upper end closed lower ending opening state, in the external wall of upper portion of the hand wheel shaft 18 Uniform welding has the more cords being vertically arranged 21, the upper end of the hand wheel shaft 18 to be inserted into flexible cylinder barrel 20, and described stretches The lower ending opening end of contracting cylinder barrel 20 is equipped with slides the slot 22 being adapted to cord 21, and the hand wheel shaft 18 is located in flexible cylinder barrel 20 End be equipped with limiting plate 23, the size of the limiting plate 23 is more than the size at the lower ending opening end of flexible cylinder barrel 20, and described It is arranged with adjustable spring 24 on hand wheel shaft 18 between limiting plate 23 and flexible cylinder barrel 20.

Since uniform welding there are the more cords being vertically arranged 21 in the external wall of upper portion of hand wheel shaft 18, stretch under cylinder barrel 20 End opening end is equipped with slides the slot 22 being adapted to cord 21, and is covered on the hand wheel shaft 18 between limiting plate 23 and flexible cylinder barrel 20 Equipped with adjustable spring 24 so that flexible cylinder barrel 20 can move up and down on hand wheel shaft 18, therefore when pulling up handwheel 19, it stretches Cylinder barrel 20 moves up therewith, and adjustable spring 24 is in compressive state at this time, and when rotating handwheel 19, due to the cord of sliding adaptation 21 with slot 22, hand wheel shaft 18 can be rotated with flexible cylinder barrel 20, to realize the rotation of hand wheel shaft 18, when acting on handwheel 19 On external force when disappearing, under the action of adjustable spring 24, flexible cylinder barrel 20 drops to origin-location with handwheel 19, and stretches The size of limiting plate 23 in cylinder barrel 20 is more than the size at the lower ending opening end of cylinder barrel 20, and limiting plate 23 can prevent hand wheel shaft 18 certainly It is detached from flexible cylinder barrel 20.

For further, it can also consider in the present invention, the lower end of the hand wheel shaft 18 passes through bearing and valve Lid 2 is rotatablely connected, and offers recessed cylindrical groove 25 on the valve casing 3 immediately below the handwheel 19, under the cylindrical groove 25 The cylindrical openings passed through for the cylinder barrel 20 that stretches are offered on the valve casing 3 of side, and closing piece 26, institute are also arranged on the flexible cylinder barrel 20 It is outer through closing piece 26 and with 26 Joint of closing piece, 26 cylindrical structure of the closing piece, and the closing piece 26 to state flexible cylinder barrel 20 The limiting tooth 27 being vertically arranged is uniformly provided on wall, the closing piece 26 is contained in cylindrical groove 25, the cylindrical groove 25 Inner wall is equipped with the card slot 28 being clamped with 27 phase of limiting tooth.

When closing piece 26 is contained in cylindrical groove 25, since the inner wall of cylindrical groove 25 is equipped with and 27 phase card of limiting tooth The card slot 28 connect, closing piece 26 can not rotate in cylindrical groove 25, i.e., hand wheel shaft 18 can not rotate, and hand wheel component is in lock at this time Determine state, 10 position of valve seat is locked, and handwheel 19 is pulled up using external force so that closing piece 26 is moved up with flexible cylinder barrel 20, when When closing piece 26 is detached from from cylindrical groove 25 completely, hand wheel shaft 18 can be driven to rotate by rotating handwheel 19, to pass through transmission Component drives rotation screwed pipe 15 to rotate, and then realizes the adjusting of 10 position of valve seat.

For further, can also consider in the present invention, the transmission component include driving gear 29 with from Moving gear 30, the driving gear 29, driven gear 30 are assemblied in hand wheel shaft 18, rotate on screwed pipe 15 respectively, and the active Gear 29 is meshed with driven gear 30, and the rotation screwed pipe 15 is rotatablely connected with hollow cavity 4 by bearing, the rotation screwed pipe 15 inner walls are equipped with internal thread.

Since driving gear 29 is meshed with driven gear 30, when hand wheel shaft 18 rotates, rotation screwed pipe 15 is therewith in Rotation in cavity 4, rotation 15 inner wall of screwed pipe are equipped with internal thread, the valve rod 11 being threadedly coupled with rotation screwed pipe 15 can on move down It is dynamic.

For further, it can also consider in the present invention, the upper end of the valve rod 11 extends upward through valve casing 3 simultaneously 3 top of valve casing is extended to, at least one guided way 37 being vertically arranged, the valve are equipped on rear side of the outer wall on 11 top of the valve rod Shell 3 is equipped with slides the guide groove 38 being adapted to guided way, and scale is vertically carved on the outer wall on 11 top of the valve rod Line 31, the graduation mark 31 are located at the top of external thread section 17.

Graduation mark 31 when valve rod 11 is moved up and down above valve casing 3 changes correspondingly, by observing exposed scale Line 31 can intuitively observe the opening size of 1 flow of valve body, and structure is simpler, observation is more illustrated, due to 11 top of valve rod Outer wall on rear side of be equipped at least one guided way 37 being vertically arranged, and valve casing 3 is equipped with and slides the guiding that is adapted to guided way Slot 38 so that valve rod 11 can only be moved up and down along the guided way 37 of sliding adaptation with guide groove 38, and can not be rotated, after And when rotating 15 forward or reverse of screwed pipe, valve rod 11 can move up or down.

For further, it can also consider in the present invention, the flap 12 is externally provided with shape therewith and matches Rubber layer 32, the valve seat 10 be column construction, and the valve seat 10 on the side wall of sleeve 13 also be equipped with rubber layer, institute It states and is additionally provided with sealing ring 33 between valve body 1 and valve deck 2, the upper end of the sleeve 13 is against on sealing ring 33, and the valve rod 11 passes through Wear sealing ring 33, be also arranged with bellows 34 on the valve rod 11 of 33 top of the sealing ring, the upper end of the bellows 34 with it is upper Guide ring 35 welds, and lower end is welded with lower guide ring 36, and the upper guide ring 35 is welded with hollow cavity 4, the lower guide ring 36 With the sidewall weld of valve rod 11.

Flap 12 is externally provided with the rubber layer 32 that shape therewith matches, and can be improved when flap 12 blocks fluid-through port 9, flap Leakproofness, reduction leakage between 12 and valve body, and the service life of flap 12 is extended, side wall of the valve seat 10 close to sleeve 13 On be also equipped with rubber layer, can be improved the leakproofness between valve seat 10 and sleeve 13, the upper end of bellows 34 is welded with upper guide ring 35 It connects, lower end is welded with lower guide ring 36, and upper guide ring 35 is welded with hollow cavity 4, the side wall of the lower guide ring 36 and valve rod 11 Welding, when valve rod 11 moves up and down, upper guide ring 35, lower guide ring 36 can protect bellows 34, ensure that leakproofness.

For further, it can also consider in the present invention, pass through bolt 16 between the valve body 1 and valve deck 2 Locking, is locked between the valve deck 2 and valve casing 3 by bolt 16.Easy to disassemble, installation is replaced.

In conclusion the utility model provide a kind of destruction reduced to valve body, it is simple in structure, occupy little space, see Examine the adjustable shut-off valve of more intuitive flow.

The utility model is described in detail in above example, but the content is only the preferable reality of the utility model Example is applied, should not be considered as limiting the scope of the present invention.Equalization made according to the scope of application of this utility model Variation and improvement etc., should all still belong within the patent covering scope of the utility model.

Claims (8)

1. a kind of adjustable shut-off valve of flow, including valve body, it is set to the valve deck of body top and is set at the top of valve deck Valve casing, through the hollow cavity being equipped with up and down in the middle part of the valve deck, the valve body includes the feed liquor being located on the flat axis of liquid Mouth, feed pathway, liquid outlet channel and liquid outlet are connected between the feed pathway and liquid outlet channel by fluid-through port, special Sign is：

Top is equipped with valve seat at the fluid-through port, and the upper end of the valve seat is connected with valve rod, and the lower end of the valve seat is equipped with hemisphere The flap of shape, the outer sheath of the valve seat are equipped with the sleeve being vertically arranged, and the upper and lower side of the sleeve is against valve deck, logical liquid respectively On valve body at mouthful, and the lower end of the sleeve is welded with valve body, and through-hole, the valve are uniformly provided on the side wall of the sleeve The upper end of bar is upward through hollow cavity and extends in valve casing, and the top of the hollow cavity is rotatable to be equipped with rotation screwed pipe, Outer wall in the middle part of the valve rod is equipped with external thread section, and the valve rod is inserted in rotation screwed pipe and connects with rotation screwed pipe screw thread It connects, rotation is equipped with hand wheel shaft in the valve casing, and the hand wheel shaft is equipped with the hand wheel component with lock function, the hand wheel shaft Pass through transmission component and rotation screwed pipe linkage.

2. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：The feed pathway is flowed in S Line style, one end open direction of the feed pathway far from inlet vertically upward, the liquid outlet channel far from liquid outlet one The top at end is connected to body top surface, and lower openings direction is vertically downward.

3. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：The hand wheel component includes upper The handwheel of lower connection and flexible cylinder barrel, the flexible cylinder barrel present end seal and close lower ending opening state, outside the top of the hand wheel shaft Uniform welding has the more cords being vertically arranged, the upper end of the hand wheel shaft to be inserted into flexible cylinder barrel on wall, and described flexible The lower ending opening end of cylinder barrel is equipped with slides the slot being adapted to cord, and the end that the hand wheel shaft is located in flexible cylinder barrel is equipped with limit Position plate, the size of the limiting plate are more than the size at the lower ending opening end of flexible cylinder barrel, and the limiting plate and flexible cylinder barrel it Between hand wheel shaft on be arranged with adjustable spring.

4. the adjustable shut-off valve of a kind of flow according to claim 3, it is characterised in that：The lower end of the hand wheel shaft is logical It crosses bearing to be rotatablely connected with valve deck, recessed cylindrical groove, the cylindrical groove is offered on the valve casing immediately below the handwheel The cylindrical openings passed through for the cylinder barrel that stretches are offered on the valve casing of lower section, and closing piece is also arranged on the flexible cylinder barrel, it is described to stretch Contracting cylinder barrel through closing piece and with closing piece Joint, the cylindrical structure of closing piece, and be uniformly provided on the outer wall of the closing piece perpendicular The limiting tooth being directly arranged, the closing piece are contained in cylindrical groove, and the inner wall of the cylindrical groove is equipped with mutually to be blocked with limiting tooth The card slot connect.

5. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：The transmission component includes master Moving gear and driven gear, the driving gear, driven gear are assemblied in hand wheel shaft, rotate on screwed pipe respectively, and the active Gear is meshed with driven gear, and the rotation screwed pipe is rotatablely connected with hollow cavity by bearing, on the rotation screwed pipe inner wall Equipped with internal thread.

6. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：The upper end of the valve rod is upward It through valve casing and extends to above valve casing, at least one guided way being vertically arranged is equipped on rear side of the outer wall on the valve rod top, The valve casing is equipped with slides the guide groove being adapted to guided way, and scale is vertically carved on the outer wall on the valve rod top Line, the graduation mark are located at the top of external thread section.

7. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：The flap is externally provided with therewith The rubber layer that shape matches, the valve seat is column construction, and the valve seat is also equipped with rubber layer on the side wall of sleeve, Sealing ring is additionally provided between the valve body and valve deck, the upper end of the sleeve is against on sealing ring, and the valve rod runs through sealing ring, Bellows is also arranged on valve rod above the sealing ring, the upper end of the bellows is welded with upper guide ring, and lower end is under Guide ring welds, and the upper guide ring is welded with hollow cavity, the sidewall weld of the lower guide ring and valve rod.

8. the adjustable shut-off valve of a kind of flow according to claim 1, it is characterised in that：Between the valve body and valve deck It is locked by bolt, is locked by bolt between the valve deck and valve casing.