CN206754403U

CN206754403U - A kind of pilot-operated type self-locking stop valve

Info

Publication number: CN206754403U
Application number: CN201621469724.1U
Authority: CN
Inventors: 金洪水
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-26
Filing date: 2016-12-26
Publication date: 2017-12-15
Anticipated expiration: 2026-12-26

Abstract

It the utility model is related to stop valve technical field, disclose a kind of pilot-operated type self-locking stop valve, also include cylinder (1), the valve body (2) being connected with cylinder (1), the valve rod (3) being located in cylinder (1) and valve body (2), the pilot valve (4) being connected with valve rod (3) lower end, the lower end of valve rod (3) is provided with the main valve plug (5) being set on valve rod (3), main valve plug (5) can move up and down on valve rod (3), main valve plug (5) is located at the top of pilot valve (4), the body diameter of pilot valve (4) is less than the body diameter of main valve plug (5).The pneumatic jack that the utility model can fill smaller air pressure opens main valve plug, reduce the pressure for opening valve element, avoid the hyperbar of small valve core required consuming when opening, pass through the self-locking of Fluid pressure, extra air pressure is not needed to ensure the sealing of main valve plug, valve rod will not cause the abrasion of sealing ring during moving up and down due to eccentric, extend the service life of sealing ring.

Description

A kind of pilot-operated type self-locking stop valve

Technical field

It the utility model is related to stop valve technical field, more particularly to a kind of pilot-operated type self-locking stop valve.

Background technology

Stop valve, pipe valve is also, is a kind of most popular valve, why very popular it is, is due to be opened and closed Frictional force is small between primary sealing area in journey, relatively durable, and Lift is little, easy to manufacture, easy to maintenance, is applicable not only to Mesolow, and it is applied to high pressure.The closure principle of stop valve is, by valve stem pressure, band movable valve plug coordinates with valve seal, Prevent flow of media.Stop valve is only permitted medium one-way flow, directional during installation.The structure length of stop valve is more than gate valve, Fluid resistance is big simultaneously, and during longtime running, sealing reliability is not strong.

At present, primary sealing area is commonly designed on valve body by traditional stop valve, and when opening, valve rod band movable valve plug takes off From the primary sealing area on valve body, due to the presence of the up no guiding parts of valve element, valve element can be increased by the lateral pressure of fluid Big opening force, cause to open inconvenience, the decentraction of valve element and valve rod also occurs and influences its and turns off tightness, and is flowing The long-term of body high flow rate is washed away, the primary sealing area on valve body can be damaged under cavitation, influences service life, and be not easy more Change, and cylinder and valve body, because valve rod moves up and down, cause the sealing ring between valve rod and sleeve pipe to be sent out directly by sleeve pipe connection Thermal softening, while cause ring wear to loosen, reduce sealing property.

Utility model content

The utility model is for the shortcomings of Opening pressure is big in the prior art, sealing ring easily wears, there is provided Yi Zhongkai Open that pressure is small, sealing ring does not allow pilot-operated type self-locking stop valve easy to wear.

In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals：

A kind of pilot-operated type self-locking stop valve, in addition to cylinder, the valve body being connected with cylinder, the valve that is located in cylinder and valve body Bar, the pilot valve being connected with valve rod lower end, the upper end of valve rod are located in cylinder, and the piston being connected with valve rod is provided with cylinder, Piston driving valve rod moves up and down, and the lower end of valve rod is provided with the main valve plug being set on valve rod, and main valve plug can be on valve rod up and down Mobile, main valve plug is located at the top of pilot valve, and the body diameter of pilot valve is less than the body diameter of main valve plug.Main valve plug leads to Cross Fluid pressure and be against valve inner, upper surface and the valve body of main valve plug offset to form self-locking, it is necessary to when opening, pushed away by inflation Dynamic pilot valve is moved down, and pilot valve separates with main valve plug, and Fluid pressure is let out between pilot valve and main valve plug Pressure, the pressure and the pressure differential of main valve plug lower end of main valve plug upper end are gradually reduced, at this point it is possible to which the pneumatic jack for filling smaller air pressure opens master Valve element, the pressure for opening valve element is reduced, avoid the hyperbar of small valve core required consuming when opening, and simple in construction, production Cost is low, by the self-locking of Fluid pressure, ensures the sealing of main valve plug without extra air pressure, saves resource.

Preferably, the lower end of valve rod is provided with screwed hole, the top of pilot valve is provided with the screw thread being connected with pilot valve Section, thread segment, which coordinates, to be tightened in screwed hole.Pilot valve is connected through a screw thread with valve rod lower end, facilitates the maintenance of pilot valve And replacing, maintenance cost is reduced, and it is easy to assembly.

Preferably, the top of main valve plug is provided with the first sleeve being connected with main valve plug, first sleeve is provided with bar shaped Spacing hole, the lower end of valve rod are provided with the stop screw coordinated with spacing hole, and stop screw is located in spacing hole.Stop screw is set In spacing hole, the stroke of main valve plug is limited, facilitates the closing by regulating valve stem control bound core and opening.

Preferably, the lower surface of main valve plug is provided with downwardly convex annular ring, the upper end of pilot valve, which is provided with, sets The first sealing ring in pilot valve, during closed mode, annular ring is offseted with the first sealing ring, and annular is provided with annular ring The first through hole of cloth arrangement, the quantity of first through hole for 4 and is arc-shaped.During core assembly self-locking, annular ring and sealing Circle offsets, and the sealing between main valve plug and pilot valve is improved, by setting through hole in the annular ring of main valve plug, in guide When valve element is opened, facilitate fluid to flow to the upper end of main valve plug by through hole, required pressure is opened so as to reduce main valve plug.

Preferably, valve rod lower end is also arranged with upper spring seat, lower spring cup, (the first back-moving spring, upper spring seat is with Gap is provided between spring base, (the first back-moving spring is set on upper spring seat and lower spring cup, and the upper end of upper spring seat is with The lower end of spring base is equipped with annular boss, the upper end of (the first back-moving spring and the lower surface phase of annular boss on upper spring seat Support, the upper surface of annular boss is offseted on the lower end of (the first back-moving spring and lower spring cup, and valve rod is provided with and upper spring seat The step surface that upper surface offsets, the lower surface of lower spring cup and the upper end of main valve plug offset.After being filled with gas, valve rod is to moving down Pilot valve is driven to move down while dynamic, upper spring seat moves down, and when upper spring seat offsets with lower spring cup, works as master When the pressure of valve element upper end is less than the elastic force of spring with the pressure differential of main valve plug lower end, (the first back-moving spring promotes main valve plug downward It is mobile, open core assembly, during return, (the first back-moving spring makes upper spring seat be separated with lower spring cup, so that pilot valve Core offsets with main valve plug, forms sealed valve core component, when valve rod moves down, promotes upper spring seat to move down by step surface, on Spring base is moved with valve rod, and reseting elasticity is provided for (the first back-moving spring.

Preferably, being provided with radiating seat between cylinder and valve body, radiating seat includes upper terminal pad and is located under terminal pad Side and the annular brace seat that be connected with upper terminal pad, the support of annular space setting is provided between upper terminal pad and annular brace seat Plate, supporting plate are located above annular brace seat vertically, and the body diameter of annular brace seat is less than the body diameter of upper terminal pad, branch The uniform edge for being arranged in annular brace seat of fagging annular.When valve rod moves up and down friction and causes temperature to rise, by valve Radiating seat is set between body and cylinder, disperses the temperature of heating in time by the gap between supporting plate, avoid sealing ring due to Temperature rise softening, reduces the sealing of sealing ring, extends sealing ring service life, enhance annular brace seat and upper connection Support strength between disk.

Preferably, also include being located at the lower terminal pad being connected below annular brace seat and with annular brace seat, annular branch The second sleeve pipe is provided between support seat and lower terminal pad, annular brace seat is provided with the second through hole communicated with the second inside pipe casing, The body diameter of second internal surface of sleeve pipe is equal with the body diameter of the second through hole, and lower terminal pad is provided with and the second inside pipe casing phase Logical third through-hole, the body diameter of third through-hole are less than the body diameter of the second internal surface of sleeve pipe.It is solid by setting sleeve pipe to be used for Determine the position that valve rod moves up and down, avoid valve rod eccentric during moving up and down, make valve rod discontinuity, cause valve rod Abrasion, reduce the service life of valve rod, the body diameter of the second through hole is less than the body diameter of internal surface of sleeve pipe, convenient in sleeve pipe Interior placement sealing ring, for strengthening the sealing between heat radiation rack and valve body.

Preferably, valve rod is provided with the second sealing ring, the second sealing ring through radiating seat between the second sleeve pipe and valve rod It is set on valve rod, is provided with the adjusting nut being threadedly coupled with annular brace seat in the middle part of annular brace seat, adjusting nut is located at the In one through hole, the lower surface of adjusting nut and the upper surface of the second sealing ring offset, close by rotating adjusting nut control second The elasticity of seal.After valve rod long-time use, abrasion and loosening that sealing ring is certain are caused, now, is adjusted by screwing Nut compresses sealing ring, keeps the sealing property of sealing ring, meanwhile, valve rod runs through adjusting nut, serves the spacing work of valve rod With avoiding the bias of valve rod.

Preferably, the lower end of piston is provided with the spring eye for being used for installing second back-moving spring, upper end is provided with spring eye The second back-moving spring to be offseted with piston, the lower end of second back-moving spring and the bottom of cylinder interior offset.By in cylinder Ventilating control piston is moved up and down so as to moving up and down with ovable valve stem, controls the unlatching of stop valve, when stop valve is closed, is only needed Stop aerating, the second second back-moving spring promotes piston to move up, and simplifies the operation of valve closing.

Preferably, cylinder includes inner casing and the shell being located on inner casing, it is convex that inner casing bottom is provided with the cylindricality to raise up Platform, valve rod runs through and cylindrical end tangs, second back-moving spring are set in cylindrical end tangs, and the upper end of shell is provided with inlet suction port.It is logical Cross and set cylindrical end tangs to limit the position that valve rod moves up and down, avoid valve rod from causing bias during moving up and down, pass through Enhance the stability of second back-moving spring.

The utility model has significant technique effect as a result of above technical scheme：Smaller air pressure can be filled Pneumatic jack opens main valve plug, reduces the pressure for opening valve element, can reduce by 50% air pressure and open main valve plug, when avoiding the small valve core from opening The hyperbar of required consuming, and it is simple in construction, production cost is low, by the self-locking of Fluid pressure, without extra gas Pressure ensures the sealing of main valve plug, saves resource, and valve rod will not cause to seal during moving up and down due to eccentric The abrasion of circle, extend the service life of sealing ring.

Brief description of the drawings

Fig. 1 is sectional structure chart of the present utility model.

Fig. 2 is the partial enlarged drawing in M portions in Fig. 1.

Fig. 3 is the partial enlarged drawing in N portions in Fig. 1.

Fig. 4 is the sectional structure chart of the utility model core assembly.

Fig. 5 is the structure chart of the utility model core assembly

Fig. 6 is the sectional structure chart of the utility model valve rod and main valve plug.

Fig. 7 is the sectional structure chart of the utility model pilot valve.

Fig. 8 is the stereogram of the utility model main valve plug.

Fig. 9 is the stereogram of heat radiation rack.

Figure 10 is heat radiation rack face upwarding stereogram.

The toponym that each number designation is referred in accompanying drawing is as follows：1- cylinders, 2- valve bodies, 3- valve rods, 4- pilot valves, 5- main valve plugs, 6- screwed holes, 7- thread segments, 8- first sleeves, 9- spacing holes, 10- stop screws, 11- annular rings, 12- first Sealing ring, 13- first through hole, 14- upper spring seats, 15- lower spring cups, 16- (the first back-moving springs, 17- annular boss, 18- platforms Terminal pad, the sleeve pipes of 24- second, 25- under terrace, 19- radiating seats, the upper terminal pads of 20-, the upper terminal pads of 21-, 22- supporting plates, 23- Second through hole, 26- third through-holes, 27- adjusting nuts, 28- pistons, 29- spring eyes, 30- inner casings, 31- shells, 32- cylindricalitys are convex Platform, 33- inlet suction ports, the sealing rings of 34- second, 35- second back-moving springs.

Embodiment

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.

Embodiment 1

A kind of pilot-operated type self-locking stop valve, as shown in Figures 1 to 10, in addition to cylinder 1, be connected with cylinder 1 valve body 2, The valve rod 3 being located in cylinder 1 and valve body 2, the pilot valve 4 being connected with the lower end of valve rod 3, the lower end of valve rod 3, which is provided with, is set in valve Main valve plug 5 on bar 3, main valve plug 5 can move up and down on valve rod 3, and main valve plug 5 is located at the top of pilot valve 4, pilot valve 4 body diameter is less than the body diameter of main valve plug 5, and the lower end of valve rod 3 is provided with screwed hole 6, the top of pilot valve 4 provided with The thread segment 7 that pilot valve 4 connects, thread segment 7, which coordinates, to be tightened in screwed hole 6, and the top of main valve plug 5 is provided with and main valve plug 5 The first sleeve 8 of connection, first sleeve 8 are provided with the spacing hole 9 of bar shaped, and the lower end of valve rod 3 is provided with the limit coordinated with spacing hole 9 Position screw 10, stop screw 10 are located in spacing hole 9, and the lower surface of main valve plug 5 is provided with downwardly convex annular ring 11, guide The upper end of valve element 4 is provided with the first sealing ring 12 in the pilot valve 4, during closed mode, the sealing of annular ring 11 and first Circle 12 offsets, and the first through hole 13 that annular uniformly arranges is provided with annular ring 11, the quantity of first through hole 13 for 4 and is circle Arcuation, the lower end of valve rod 3 are also arranged with upper spring seat 14, lower spring cup 15, (the first back-moving spring 16, upper spring seat 14 and lower spring Seat 15 between be provided with gap, (the first back-moving spring 16 is set on upper spring seat 14 and lower spring cup 15, upper spring seat 14 it is upper End and the lower end of lower spring cup 15 are equipped with annular boss 17, upper end and the convex annular on upper spring seat 14 of (the first back-moving spring 16 The lower surface of platform 17 offsets, and the lower end and the upper surface of annular boss 17 on lower spring cup 15 of (the first back-moving spring 16 offset, valve Bar 3 is provided with the step surface 18 to be offseted with the upper surface of upper spring seat 14, the lower surface of lower spring cup 15 and the upper end of main valve plug 5 Portion offsets.

Radiating seat 19 is provided between cylinder 1 and valve body 2, radiating seat 19 includes upper terminal pad 20 and is located under terminal pad 20 Side and the annular brace seat 21 being connected with upper terminal pad 20, set between upper terminal pad 20 and annular brace seat 21 provided with annular space The supporting plate 22 put, supporting plate 22 are located at the top of annular brace seat 21 vertically, and the body diameter of annular brace seat 21 is less than upper company The body diameter of disk 20 is connect, the annular of supporting plate 22 is uniformly arranged in the edge of annular brace seat 21, in addition to is located at annular brace The lower section of seat 21 and the lower terminal pad 23 being connected with annular brace seat 21, are provided with second between annular brace seat 21 and lower terminal pad 23 Sleeve pipe 24, annular brace seat 21 are provided with the second through hole 25 with being communicated inside the second sleeve pipe 24, the circle of the inwall of the second sleeve pipe 24 Column diameter is equal with the body diameter of the second through hole 25, and lower terminal pad 23 is provided with the threeway with being communicated inside the second sleeve pipe 24 Hole 26, the body diameter of third through-hole 26 are less than the body diameter of the inwall of the second sleeve pipe 24, and valve rod 3 is through radiating seat 19, and the The second sealing ring 34 is provided between two sleeve pipes 24 and valve rod 3, the second sealing ring 34 is set on valve rod 3, in annular brace seat 21 Portion is provided with the adjusting nut 27 being threadedly coupled with annular brace seat 21, and adjusting nut 27 is located in first through hole, adjusting nut 27 Lower surface and the upper surface of the second sealing ring 34 offset, pass through rotating adjusting nut 27 control the second sealing ring 34 it is elastic Degree.

The upper end of valve rod 3 is located in cylinder 1, the piston 28 being connected with valve rod 3 is provided with cylinder 1, the lower end of piston 28 is set There are the spring eye 29 for installing second back-moving spring 35, the second reset bullet to be offseted in spring eye 29 provided with upper end with piston 28 Spring 35, lower end and the bottom inside cylinder 1 of second back-moving spring 35 offset, and the upper end of piston 28 is provided with endoporus, is set in endoporus There is the nut being connected with the threaded upper ends of valve rod 3, nut is fixedly connected with piston 28, and piston 28 is shaped as H types, and cylinder 1 includes Inner casing 30 and the shell 31 being located on inner casing 30, the bottom of inner casing 30 are provided with the cylindrical end tangs 32 to raise up, and valve rod 3 runs through and post Shape boss 32, second back-moving spring 35 are set in cylindrical end tangs 32, and the upper end of shell 31 is provided with inlet suction port 33.

During work, the fluid valve bodies in valve body 2 are more than the pressure of the top of main valve plug 5, therefore main valve plug 5 is withstood on into valve body 2 On, the self-locking of core assembly is formed, when needing to open core assembly, inlet suction port 33 is inflated, and promotes piston 28 to move down, piston 28 move down when moving down with ovable valve stem 3, and valve rod 3 promotes pilot valve 4 to move down, and a part of fluid is by flowing in valve body 2 Between pilot valve 4 and main valve plug 5, fluid is flow to above main valve plug 5 from the first through hole 13 of main valve plug 5, the top of main valve plug 5 with Pressure differential in valve body 2 reduces, and upper spring seat 14 offsets under the drive of valve rod 3 with lower spring cup 15, when the upper end of main valve plug 5 When pressure and the pressure differential of main valve plug lower end are less than the elastic force of (the first back-moving spring 16, (the first back-moving spring 16 promotes main valve plug 5 Move down, now main valve plug 5 is opened, and fluid flows out at main valve plug 5, because pilot valve 4 and the contact area of fluid are small, So inflation pushes up pilot valve 4 air pressure opened much smaller than the top of main valve plug 5 directly is opened into required air pressure, when opening, only need The unlatching of core assembly can be completed being filled with less air pressure by cylinder, save resource, during closing, inlet suction port 33 Stop inflation, piston 28 moves up under the reset force of second back-moving spring 35, and valve rod 3 drives pilot valve 4 and main valve plug 5 Reset.

In a word, preferred embodiment of the present utility model is the foregoing is only, it is all according to present utility model application the scope of the claims institute The equivalent changes and modifications of work, it should all belong to the covering scope of the utility model patent.

Claims

1. a kind of pilot-operated type self-locking stop valve, in addition to cylinder (1), be connected with cylinder (1) valve body (2), be located at cylinder (1) and Valve rod (3) in valve body (2), the pilot valve (4) being connected with valve rod (3) lower end, it is characterised in that：The upper end of valve rod (3) is set The piston (28) being connected with valve rod (3) is provided with cylinder (1), in cylinder (1), piston (28) band ovable valve stem (3) moves up and down, The lower end of valve rod (3) is provided with the main valve plug (5) being set on valve rod (3), and main valve plug (5) can move up and down on valve rod (3), main Valve element (5) is located at the top of pilot valve (4), and the body diameter of pilot valve (4) is less than the body diameter of main valve plug (5).

A kind of 2. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：The lower end of valve rod (3) is provided with spiral shell Pit (6), the top of pilot valve (4) are provided with the thread segment (7) being connected with pilot valve (4), and thread segment (7), which coordinates, to be tightened on In screwed hole (6).

A kind of 3. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：The top of main valve plug (5) is provided with The first sleeve (8) being connected with main valve plug (5), first sleeve (8) are provided with the spacing hole (9) of bar shaped, and the lower end of valve rod (3) is set There is the stop screw (10) coordinated with spacing hole (9), stop screw (10) is located in spacing hole (9).

A kind of 4. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：On the lower surface of main valve plug (5) Provided with downwardly convex annular ring (11), the upper end of pilot valve (4) is provided with the first sealing ring in pilot valve (4) (12), during closed mode, annular ring (11) offsets with the first sealing ring (12), is provided with what annular uniformly arranged in annular ring (11) First through hole (13), the quantity of first through hole (13) for 4 and is arc-shaped.

A kind of 5. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：Valve rod (3) lower end is also arranged with Upper spring seat (14), lower spring cup (15), (the first back-moving spring (16), are provided between upper spring seat (14) and lower spring cup (15) Gap, (the first back-moving spring (16) are set on upper spring seat (14) and lower spring cup (15), the upper end of upper spring seat (14) and The lower end of lower spring cup (15) is equipped with annular boss (17), upper end and the ring on upper spring seat (14) of (the first back-moving spring (16) The lower surface of shape boss (17) offsets, the lower end of (the first back-moving spring (16) with lower spring cup (15) annular boss (17) it is upper End face offsets, the step surface (18) that valve rod (3) offsets provided with the upper surface with upper spring seat (14), under lower spring cup (15) The upper end of end face and main valve plug (5) offsets.

A kind of 6. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：Between cylinder (1) and valve body (2) Provided with radiating seat (19), radiating seat (19) include upper terminal pad (20) and be located at terminal pad (20) lower section and with upper terminal pad (20) the annular brace seat (21) of connection, the branch that annular space is set is provided between upper terminal pad (20) and annular brace seat (21) Fagging (22), supporting plate (22) are located above annular brace seat (21) vertically, and the body diameter of annular brace seat (21) is less than upper The body diameter of terminal pad (20), the uniform edge for being arranged in annular brace seat (21) of supporting plate (22) annular.

A kind of 7. pilot-operated type self-locking stop valve according to claim 6, it is characterised in that：Also include being located at annular brace seat (21) lower section and the lower terminal pad (23) being connected with annular brace seat (21), between annular brace seat (21) and lower terminal pad (23) Provided with the second sleeve pipe (24), annular brace seat (21) is provided with the second through hole (25) with being communicated inside the second sleeve pipe (24), the The body diameter of two sleeve pipes (24) inwall is equal with the body diameter of the second through hole (25), and lower terminal pad (23) is provided with and second The third through-hole (26) communicated inside sleeve pipe (24), the body diameter of third through-hole (26) are less than the circle of the second sleeve pipe (24) inwall Column diameter.

A kind of 8. pilot-operated type self-locking stop valve according to claim 7, it is characterised in that：Valve rod (3) is through radiating seat (19) the second sealing ring (34), is provided between the second sleeve pipe (24) and valve rod (3), the second sealing ring (34) is set in valve rod (3) On, the adjusting nut (27) being threadedly coupled with annular brace seat (21), adjusting nut (27) are provided with the middle part of annular brace seat (21) It is located in first through hole, the lower surface and the upper surface of the second sealing ring (34) of adjusting nut (27) offset, and are adjusted by rotating Nut (27) controls the elasticity of the second sealing ring (34).

A kind of 9. pilot-operated type self-locking stop valve according to claim 1, it is characterised in that：The lower end of piston (28), which is provided with, to be used Answered in being provided with upper end and piston (28) offsets second in the spring eye (29) of installation second back-moving spring (35), spring eye (29) Position spring (35), the bottom that the lower end of second back-moving spring (35) is internal with cylinder (1) offset.

A kind of 10. pilot-operated type self-locking stop valve according to claim 9, it is characterised in that：Cylinder (1) includes inner casing (30) With the shell (31) being located on inner casing (30), inner casing (30) bottom is provided with the cylindrical end tangs (32) to raise up, and valve rod (3) runs through With cylindrical end tangs (32), second back-moving spring (35) is set in cylindrical end tangs (32), and the upper end of shell (31) is provided with air inlet connecting Head (33).