CN2844598Y

CN2844598Y - Direct-operated regulator

Info

Publication number: CN2844598Y
Application number: CN 200620003473
Authority: CN
Inventors: 葛建岳; 李国聪
Original assignee: RITAI VALVE MANUFACTURING Co Ltd SHANGHAI
Current assignee: RITAI VALVE MANUFACTURING Co Ltd SHANGHAI
Priority date: 2005-09-20
Filing date: 2006-01-12
Publication date: 2006-12-06
Anticipated expiration: 2016-01-12

Abstract

The utility model relates to a kind of direct-operated regulator, it is characterized in that: the actuator that is made of valve valve body, flap, flap spring, middle headrest material, positioning pressuring plate, valve gap, filler, gland nut, support, adjusting screw rod; The indicating device that forms valve by scale label, direction board; By regulating cylinder adjustable lever, adjusting air cylinder base, piston, adjusting cylinder barrel, regulate the cylinder bedding and padding, regulate cylinder upper cover, regulate the cylinder spring, regulating the controlling mechanism that cylinder spring cushion block is formed valve; The control mechanism of forming valve by copper elbow, hexagonal socket, copper pipe, decompression type pilot valve, contiguous block, cross fitting, flanged joint, tee union, needle-valve, nut.The utility model has the advantages that and can be used for the occasion of rated pressure up to the high-pressure fluid medium of 6.4Mpa; Both but dynamic adjustments also can staticly be regulated; The adjusting of both can having relied on oneself, but also manual tune; Easy to adjust, quick, reliable.

Description

Direct-operated regulator

Technical field

The utility model relates to a kind of direct-operated regulator, be applicable to that maximum pressure can be to the pipeline of the high-pressure fluid medium of 6.4Mpa, flow through the flow of the medium of valve passage with adjusting, or decompression, voltage stabilizing are with the pressure of the medium at regulating valve passage lower exit place, be applicable to flowing mediums such as the liquid of noncorrosive temperature in 0-80 ℃ of scope, gas, be widely used in industrial department and water-supply systems such as oil, chemical industry, metallurgy, light industry, belong to the modulating valve technical field.

Background technique

At present, direct-operated regulator is by valve body, flap, valve rod, Regulation spring, regulate cylinder and piston or regulate compositions such as diaphragm chamber and diaphragm, its working principle is: the valve pilot line is in parallel with valve passage, the upstream end points of valve pilot line is linked the upstream end of valve passage, the downstream end points of valve pilot line is linked the downstream part of valve passage, the pressure of the flowing medium of the upstream and downstream of valve pilot line is delivered in the cavity of resorption that is separated into by piston of regulating cylinder and the epicoele by connecting respectively or is regulated in the cavity of resorption and epicoele that are separated into by diaphragm of diaphragm chamber, the elastic force pressure that pressure difference that acts on the medium on the piston of regulating cylinder or the diaphragm of the regulating diaphragm chamber that generates therefrom and Regulation spring act on the piston of regulating cylinder or the diaphragm of the regulating diaphragm chamber carries out balance so that flap is opened in certain position, thereby reach if the pressure of the medium at valve passage upstream inlet place be a steady state value words then the pressure of the medium at valve passage lower exit place also be the purpose of a steady state value, the size of elastic force pressure that can also be by regulating Regulation spring is come the pressure of the medium at regulating valve passage lower exit place.But, this adjusting is only dynamically carried out, promptly can only just can regulate there being media flow to pass under the situation of valve passage, can not regulate under the static situation when the ducted flowing medium of valve downstream is dammed, and, for regulating diaphragm chamber type direct-operated regulator, its rated working pressure does not generally allow to surpass 1.6Mpa.

Summary of the invention

To be that invention is a kind of can regulate the flow size of pressure of medium at the size of flow of the medium that flows through valve passage when passing valve passage or valve passage lower exit place of flowing medium to the purpose of this utility model, the direct-operated regulator of the size of the pressure of the medium at valve passage lower exit place when the ducted flowing medium that can be adjusted in valve downstream is again dammed.

For realizing above purpose, the technical solution of the utility model provides a kind of direct-operated regulator, it is characterized in that:

Valve body, flap, the flap spring, middle headrest material, positioning pressuring plate, valve gap, filler, gland nut, support, adjusting screw rod is formed the actuator of valve, flap is located on the mouth end of valve passage downstream inlet, the lower end that can drive the adjusting screw rod that flap moves up and down is connected with flap by screw thread and by fastening this connection of pin, the lower end of its upper end and the adjusting cylinder adjustable lever of the controlling mechanism of valve is by being threaded and this be connected by nut check, valve gap is conditioned screw rod and passes and pass through positioning pressuring plate, in headrest material be connected with valve body and by this connection of bolton, be provided with filler between valve gap and the adjusting screw rod and compress by gland nut;

Scale label, direction board are formed the indicating device of valve, and the scale label is fixed on by screw, packing ring and nut on the support of actuator of valve, and direction board is fixed on by nut on the adjusting cylinder adjustable lever of controlling mechanism of valve;

Regulate the cylinder adjustable lever, regulate air cylinder base, piston, regulate cylinder barrel, regulate the cylinder bedding and padding, regulate cylinder upper cover, regulate the cylinder spring, regulate cylinder spring cushion block and form the controlling mechanism of valve, regulate that air cylinder base is connected with the support of the actuator of valve and by this connection of bolton, regulating the cylinder barrel lower end is connected with the adjusting air cylinder base by regulating the cylinder bedding and padding, its upper end is connected with the adjusting cylinder upper cover by regulating the cylinder bedding and padding, regulate air cylinder base, regulate cylinder barrel, regulate cylinder upper cover, adjusting cylinder bedding and padding etc. pass through double-screw bolt, nut is fastening as a whole, thereby piston be installed in regulate in the cylinder barrel and by be installed in above it O-ring seals with regulate cylinder barrel within wall contact will regulate cylinder barrel be divided into about two chambeies, the piston upper end is laid and is regulated the cylinder spring, regulating the cylinder spring props up on the adjusting cylinder upper cover by regulating cylinder spring cushion block, the piston lower end links to each other with the upper end of passing support and the adjusting cylinder adjustable lever of regulating air cylinder base by screw thread and should be connected by nut check, the lower end of adjusting cylinder adjustable lever is connected with the upper end of the adjusting screw rod of the actuator of valve by screw thread and by this connection of nut check, the adjusting air cylinder base is conditioned the cylinder adjustable lever place of passing O-ring seals is installed;

Copper elbow, the hexagonal socket, copper pipe, the decompression type pilot valve, contiguous block, cross fitting, flanged joint, tee union, needle-valve, nut is formed the control mechanism of valve, the decompression type pilot valve is linked to regulate by contiguous block and is positioned at the back of regulating cylinder barrel on the cylinder upper cover, the decompression type pilot valve has three connection mouth A, B, C, first connection mouth is that the A mouth passes through pipe joint, copper pipe, nut and flanged joint are linked on the flange of inlet of valve passage upstream, second connection mouth is that the B mouth passes through pipe joint, copper pipe and nut are linked on first connection mouth of tee union, second connection mouth of tee union is linked the cavity of resorption of regulating cylinder barrel by the hexagonal socket, the 3rd connection mouth of tee union is connected with the import of needle-valve, pipe joint is passed through in the outlet of needle-valve, one of copper pipe and nut and cross fitting lead to and connect, and following place is linked in the other threeway of cross fitting respectively: pass through pipe joint, copper pipe, nut, the epicoele of regulating cylinder barrel is linked in copper elbow and hexagonal socket; The 3rd connection mouth of linking the decompression type pilot valve by pipe joint, copper pipe and nut is on the C mouth; Link by copper pipe, nut and flanged joint on the flange at valve passage lower exit place.

The utility model has utilized the self-powering type principle: the variation of the closing of valve, unlatching and opening degree etc. is not to depend on external force, but the internal force that depends on the suffered valve of the valve core part of the valve that flap, adjusting screw rod, adjusting cylinder adjustable lever and piston etc. fuse and residing stress balance position when obtaining balance.When having flowing medium to flow to pass valve passage, flap is except that the elastic force pressure that is subjected to the flap spring, and the flap bottom also is subjected to the pressure of the flowing medium of valve passage upstream, and flap top also is subjected to the pressure of valve passage fluid downstream medium; Piston be subjected to regulating the cylinder barrel upper and lower cavity flowing medium pressure difference and regulate the elastic force pressure of cylinder spring.Because the size of the elastic force pressure that flap spring and adjusting cylinder spring produce depends on flap spring and the decrement of regulating the cylinder spring respectively, and the flap spring and the decrement of regulating the cylinder spring all depend on the position of the valve core part of the valve that fuses, thereby flap spring and the size of regulating the elastic force pressure that the cylinder spring applies all depend on the position of the valve core part of valve.Be in the range of working pressure that to open valve and under certain situation in the size of the pressure of the medium of valve passage upstream, the position of the valve core of valve part also determining the valve passage downstream medium pressure size and regulate the pressure extent of the medium of cylinder barrel upper and lower cavity, therefore, the valve core of valve part must be in a certain definite stress balance position and be in the stress balance state, the determining positions of this stress balance the opening degree of valve; In size variation to the new value of the pressure of the medium of valve passage upstream but still when being in the range of working pressure that to open valve, the valve core of valve part must be in a certain new stress balance position of determining and be in the stress balance state, the determining positions of the stress balance that this is new the new opening degree of valve.When not having flowing medium to flow to pass valve passage, valve can be closed automatically.

The utility model has utilized pressure containing principle: when having flowing medium to flow to pass valve passage, the opening degree of valve depends on the size of the pressure of the pressure extent of flowing medium of valve passage upstream and downstream and valve passage fluid downstream medium.When the pressure difference of the medium of valve passage upstream and downstream increases, the pressure difference of the pressure difference of the medium of adjusting cylinder barrel upper and lower cavity and the medium of flap top and the bottom all can increase, so that the tendency that valve has out greatlyyer, so the pressure of the medium in valve passage downstream can increase relatively, the increase of the pressure of the medium in valve passage downstream can make the opening degree of decompression type pilot valve reduce, thereby the pressure difference of the medium of regulating the cylinder barrel upper and lower cavity is reduced, so tendency that valve just has out forr a short time, and then exist on the valve open greatlyyer and these two kinds of tendencies that open forr a short time make flap on the valve, adjusting screw rod, the valve core of the valve that adjusting cylinder adjustable lever and piston etc. fuse partly is easy to arrive the stress balance position, thereby makes the opening degree of valve be easy to reach steady state.On the contrary, when the pressure difference of the medium of valve passage upstream and downstream reduces, the pressure difference of the pressure difference of the medium of adjusting cylinder barrel upper and lower cavity and the medium of flap top and the bottom all can reduce, so that the tendency that valve has out forr a short time, so the pressure of the medium in valve passage downstream can reduce relatively, the opening degree increase that reduces to make the decompression type pilot valve of the pressure of the medium in valve passage downstream, thereby the pressure difference of the medium of regulating the cylinder barrel upper and lower cavity is increased, so tendency that valve just has out greatlyyer, and then exist on the valve open forr a short time and these two kinds of tendencies that open greatlyyer make flap on the valve, adjusting screw rod, the valve core of the valve that adjusting cylinder adjustable lever and piston etc. fuse partly is easy to arrive the stress balance position, thereby makes the opening degree of valve be easy to reach steady state.As seen, the variation of the size of the pressure of the medium in valve passage downstream is for the flap on the valve, adjusting screw rod, the action effect of the valve core part of the valve that adjusting cylinder adjustable lever and piston etc. fuse, always with the changing in the same way of the pressure extent of the medium of valve passage upstream and downstream for the flap on the valve, adjusting screw rod, the action effect of the valve core part of the valve that adjusting cylinder adjustable lever and piston etc. fuse is opposite, it is the pressure extent of the medium of the size of pressure of medium in valve passage downstream and valve passage upstream and downstream, with regard to them for the flap on the valve, adjusting screw rod, the action effect of the valve core part of the valve that adjusting cylinder adjustable lever and piston etc. fuse, containing mutually.And, because the change direction of the size of the pressure of the medium in valve passage downstream is identical with the change direction of the pressure extent of the medium of valve passage upstream and downstream---promptly one becomes big, and another also becomes big; One diminishes, and another also diminishes.Therefore, under the situation that the pressure extent of the medium of the size of the pressure of the medium in valve passage downstream or valve passage upstream and downstream changes, the valve core part of the valve that the flap on the valve, adjusting screw rod, adjusting cylinder adjustable lever and piston etc. fuse can arrive new stress balance position rapidly and regain balance, promptly under the situation that pressure condition changes, the opening degree of valve not only can and be easy to reach again steady state.

The utility model has also utilized the volume-expanding pressure-reducing principle: when the ducted flowing medium of valve downstream is dammed, the pressure of valve passage fluid downstream medium can increase suddenly, so the high-pressure fluid medium in valve passage downstream just can be rushed to rapidly by the copper pipe that links to each other with the downstream in the buffering cylinder barrel of decompression type pilot valve and by the damping spring that compresses in this buffering cylinder barrel the volume of this buffering cylinder barrel is enlarged, thereby cause the decompression type pilot valve to be closed earlier, then cause valve closing, so valve passage downstream and be attached thereto logical copper pipe, regulate the cylinder barrel upper and lower cavity, buffering cylinder barrel and flowing medium from valve passage lower exit end to the valve downstream pipeline by this segment pipe till damming etc. just connection formed an airtight cavity volume, the pressure of the medium that does not exist together in this airtight cavity volume is understood equalization and is reached a stable end point values, and this end point values can be adjusted by the extrusion of the adjusting bolt on the pilot valve base of regulating the decompression type pilot valve.

The utility model has the advantages that:

1. can be used for the high pressure occasion

Owing to adopt the opening degree controlling device of piston cylinder type, and the pressure-bearing component of valve are all made by metallic material, so valve can be used for the occasion of rated pressure up to the high-pressure fluid medium of 6.4Mpa.

2. but both dynamic adjustments also can staticly be regulated

When having flowing medium to flow to pass valve passage, the size of opening that can be by metering pin valve or the extrusion by the adjusting bolt on the pilot valve base of regulating the decompression type pilot valve flow through the size of pressure of the medium at the size of flow of medium of valve passage or regulating valve passage lower exit place with adjusting, this is a dynamic adjustments; When the ducted flowing medium of valve downstream is dammed, can come the size of pressure of the medium at regulating valve passage lower exit place by the extrusion of the adjusting bolt on the pilot valve base of regulating the decompression type pilot valve, this be static adjusting.

3. the adjusting of both can having relied on oneself, but also manual tune

Because model utility can carry out the pressure containing, promptly the pressure extent of the flowing medium of valve passage upstream and downstream can with the size containing mutually of the pressure of the flowing medium at valve passage lower exit place, the adjusting of therefore relying on oneself; The size of opening that also can be by metering pin valve or the extrusion by the adjusting bolt on the pilot valve base of regulating the decompression type pilot valve are carried out manual tune.

4. easy to adjust, quick, reliable

Manual tune is that the handwheel by the turn needle-valve carries out with the size of the opening of metering pin valve or by the extrusion of the adjusting bolt on the pilot valve base of regulating the decompression type pilot valve, and is as seen easy to adjust, quick.And, because this valve can carry out the pressure containing and the adjusting of relying on oneself, thereby regulate reliable.

Description of drawings

Fig. 1 is the direct-operated regulator structural representation;

Fig. 2 is the direct-operated regulator side view;

Fig. 3 is the direct-operated regulator plan view;

Fig. 4 is the structural representation of the decompression type pilot valve of direct-operated regulator;

Fig. 5 is the decompression type pilot valve A-A sectional view of direct-operated regulator.

Embodiment

Come the utility model is further described below in conjunction with drawings and Examples.

Embodiment

As Fig. 1,2,3,4, shown in 5, valve body 1, flap 2, flap spring 3, middle headrest material 5, positioning pressuring plate 6, valve gap 7, filler 9, gland nut 11, support 12, adjusting screw rod 13 is formed the actuator of valve, flap 2 is located on the mouth end of valve downstream import, can drive that adjusting screw rod 13 lower ends that flap 2 moves up and down are connected with flap 2 by screw thread and by pin 4 fastening these connections, its upper end is connected by being threaded and locking this by nut 14 with the lower end of the adjusting cylinder adjustable lever 17 of the controlling mechanism of valve, valve gap 7 is conditioned that screw rod 13 passes and by middle headrest material 5, positioning pressuring plate 6 is connected with valve body 1 and by bolt 8 fastening these connections, is provided with filler 9 between valve gap 7 and the adjusting screw rod 13 and is compressed by gland nut 11.The state that the actuator of valve can make valve be in complete opening, close or partly open fully by flap 2 relative position different with the mouth end formation of valve passage downstream inlet;

Scale label 18, direction board 16 are formed the indicating device of valve, scale label 18 is fixed on by screw 19, packing ring 20 and nut 21 on the support 12 of actuator of valve, direction board 16 is fixed on by nut 15 on the adjusting cylinder adjustable lever 17 of controlling mechanism of valve, and the different relative position that forms by direction board 16 and scale label 18 indicates the degree of complete opening state, buttoned-up status or the unlatching of valve;

Regulate cylinder adjustable lever 17, regulate air cylinder base 23, piston 26, regulate cylinder barrel 28, regulate cylinder bedding and padding 29, regulate cylinder upper cover 30, regulate cylinder spring 31, regulate cylinder spring cushion block 32 and form the controlling mechanism of valve, regulate that air cylinder base 23 is connected with the support 12 of the actuator of valve and pass through bolt 22 fastening these connections, regulating cylinder barrel 28 lower ends is connected with adjusting air cylinder base 23 by regulating cylinder bedding and padding 29, its upper end is connected with adjusting cylinder upper cover 30 by regulating cylinder bedding and padding 29, regulate air cylinder base 23, regulate cylinder barrel 28, regulate cylinder upper cover 30, regulate cylinder bedding and padding 29 grades by double-screw bolt 36, nut 37 is fastening as a whole, thereby piston 26 be installed in regulate in the cylinder barrel 28 and by be installed in above it O-ring seals 25 with regulate cylinder barrel 28 within wall contact will regulate cylinder barrel 28 be divided into about two chambeies, piston 26 upper ends are laid and are regulated cylinder spring 31, regulating cylinder spring 31 props up on adjusting cylinder upper cover 30 by regulating cylinder spring cushion block 32, piston 26 lower ends link to each other with the upper end of passing support 12 and the adjusting cylinder adjustable lever 17 of regulating air cylinder base 23 by screw thread and this is connected by nut 27 lockings, the lower end of adjusting cylinder adjustable lever 17 is connected with the upper end of the adjusting screw rod 13 of the actuator of valve by screw thread and by nut 14 these connections of locking, adjusting air cylinder base 23 is conditioned cylinder adjustable lever 17 places of passing O-ring seals 24 is installed.The regulatory function of the controlling mechanism of valve is achieved in that on the one hand, the pressure of regulating the flowing medium of the upper and lower cavity that cylinder barrel 28 is separated into by piston 26 is taken at not existing together of pilot line and has pressure difference, thereby piston 26 is when bearing the elastic force pressure of regulating cylinder spring 31, the pressure difference of also bearing the medium of the upper and lower cavity of regulating cylinder barrel 28; On the other hand, the upper end of adjusting cylinder adjustable lever 17 is connected with piston 26 (O-ring seals 25 is housed) by screw thread and is locked by nut 27, its lower end is connected with the upper end of the adjusting screw rod 13 of the actuator of valve by screw thread and is locked by nut 14, the flap 2 of the lower end of adjusting screw rod 13 and the actuator of valve is by being threaded and by 4 fastening should connections of pin, thereby piston 26 (O-ring seals 25 is housed), adjusting cylinder adjustable lever 17, adjusting screw rod 13, flap 2 just have been linked to be an integral body.Therefore, the piston 26 of the controlling mechanism of valve just can according to the power such as elastic force pressure of the pressure difference of the medium of the upper and lower cavity of its suffered adjusting cylinder barrel 28 and suffered adjusting cylinder spring 31 make a concerted effort with the pressure difference of the medium of the suffered valve passage upstream and downstream of the flap 2 of the actuator of valve and power such as elastic force pressure that flap spring 3 is granted make a concerted effort to synthesize the result determine the adjusting action that it is concrete: be that to be in balance static, the flap 2 that still drives the actuator of valve is made up-down adjustment and is moved static until reaching new balance.

Copper elbow 33, hexagonal socket 34, copper pipe 38, decompression type pilot valve 39, contiguous block 40, cross fitting 41, flanged joint 42, tee union 43, needle-valve 44, nut 45 etc. are formed the control mechanism of valve.Decompression type pilot valve 39 is linked to regulate by contiguous block 40 and is positioned at the back of regulating cylinder barrel 28 on the cylinder upper cover 30, decompression type pilot valve 39 has three connection mouth A, B, C, first connection mouth is that the A mouth is by pipe joint 35, copper pipe 38, nut 45 and flanged joint 42 are linked on the flange of inlet of valve passage upstream, second connection mouth is that the B mouth is by pipe joint 35, copper pipe 38 and nut 45 are linked on first connection mouth of tee union 43, second connection mouth of tee union 43 is linked the cavity of resorption of regulating cylinder barrel 28 by hexagonal socket 34, the 3rd connection mouth of tee union 43 is connected with the import of needle-valve 44, the outlet of needle-valve 44 is by pipe joint 35, copper pipe 38 and nut 45 leads to one of cross fitting 41 and connects, and following place is linked in the other threeway of cross fitting 41 respectively: by pipe joint 35, copper pipe 38, nut 45, the epicoele of regulating cylinder barrel 28 is linked in copper elbow 33 and hexagonal socket 34; The 3rd connection mouth of linking decompression type pilot valve 39 by pipe joint 35, copper pipe 38 and nut 45 is on the C mouth; Link by copper pipe 38, nut 45 and flanged joint 42 on the flange in outlet port in valve passage downstream.The working principle of the control mechanism of valve and working procedure are: the flap 2 in the actuator of valve, the adjusting cylinder adjustable lever 17 of the controlling mechanism of adjusting screw rod 13 and valve, when the integral body that piston 26 component such as (containing O-ring seals 25) are linked to be is in some equilibrium positions, thereby the handwheel by turn needle-valve 44 slowly directly changes the pressure extent of flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 with the openings of sizes that changes needle-valve 44, or thereby the extrusion by the adjusting bolt 51 on the pilot valve base 53 of slowly regulating decompression type pilot valve 39 changes the pressure extent of flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 indirectly with the openings of sizes that changes decompression type pilot valve 39, make flap 2 by the actuator of valve, the adjusting cylinder adjustable lever 17 of the controlling mechanism of adjusting screw rod 13 and valve, the stress balance state of the integral body that piston 26 component such as (containing O-ring seals 25) are linked to be produces from equilibrating to uneven again to the change procedure of balance, and the pressure of flowing medium that flows through the flow of flowing medium of valve passage or regulating valve passage lower exit place with adjusting is to satisfy actual usage requirement.

In sum and with reference to the accompanying drawings as can be known: flap 2, adjusting screw rod 13, direction board 16, regulate cylinder adjustable lever 17, piston 26 component respectively by being threaded and fusing and become the heart of valve portion by nut 14, nut 15, nut 27 lockings respectively, the stressing conditions of this valve stem portion is: flap 2 be subjected to the valve passage upstream and downstream flowing medium pressure difference and be subjected to the elastic force pressure of flap spring 3, piston 26 be subjected to regulating cylinder barrel 28 upper and lower cavity flowing medium pressure difference and be subjected to regulating the elastic force pressure of cylinder spring 31.The size of the elastic force pressure that flap spring 3 and adjusting cylinder spring 31 produce depends on the decrement of two springs respectively, the decrement of two springs depends on the position of the heart portion of the valve that fuses again, thereby when the pressure one of the pressure difference of the flowing medium of valve passage upstream and downstream and valve passage fluid downstream medium regularly, then the valve core of valve part must be in a certain definite position so that the pressure difference of the flowing medium of the upper and lower cavity of the pressure difference of the flowing medium of the valve passage upstream and downstream that elastic force pressure that acts on piston 26 that elastic force pressure that acts on flap that flap spring 3 produces and adjusting cylinder spring 31 produce and flap 2 are subjected to and the adjusting cylinder barrel 28 that piston 26 is subjected to balances each other, and the equilibrium position that this of the heart portion of valve determined has promptly determined the unlatching of valve, the degree of closing and opening.

During work, if the ducted flowing medium of valve downstream is dammed, then the pressure of valve passage fluid downstream medium can increase suddenly, so the high-pressure fluid medium in valve passage downstream just can be rushed to rapidly by the copper pipe 38 that links to each other with the downstream in the buffering cylinder barrel 58 of decompression type pilot valve 39 and by the damping spring 57 that compresses in this buffering cylinder barrel the volume of this buffering cylinder barrel is enlarged, thereby cause decompression type pilot valve 39 to be closed earlier, then cause valve closing, so valve passage downstream and be attached thereto logical copper pipe 38, regulate the upper and lower cavity of cylinder barrel 28, the buffering cylinder barrel 58 of decompression type pilot valve 39 and the medium from valve passage lower exit end to the valve downstream pipeline just have been connected to form an airtight cavity volume by this segment pipe till damming etc., the pressure of the flowing medium that does not exist together in this airtight cavity volume is understood equalization and is reached a stable end point values, and this end point values can be adjusted by the extrusion of the adjusting bolt 51 on the pilot valve base 53 of regulating decompression type pilot valve 39.

The mobile valve passage that passes of flowing medium is being arranged, and when the pressure of the flowing medium of valve passage upstream raises or the pressure of the flowing medium of the pressure of valve passage fluid downstream medium or valve passage upstream when reducing raises and the pressure reduction of valve passage fluid downstream medium when existing simultaneously, the pressure difference of the flowing medium between the valve passage upstream and downstream just can increase, at this moment, the pressure difference of the flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 just can increase, the heart portion of the valve that comprises flap 2 that fuses just can be up, cause the pressure of valve passage fluid downstream medium to increase, the increase of the pressure of valve passage fluid downstream medium can cause the opening of decompression type pilot valve 39 to reduce, so the pressure difference of the flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 just can reduce, the heart portion of the valve that comprises flap 2 that fuses just can be descending, two kinds of tendencies of these uplink and downlink can make the very fast stress balance position that arrives again of the heart portion of the valve that comprises flap 2 that fuses, being that the opening degree of valve is very fast reaches steady state again, thereby makes the very fast steady state that reaches again of size of pressure of the medium at the size of flow of the medium that flows through valve passage and valve passage lower exit place.

The mobile valve passage that passes of flowing medium is being arranged, and when the pressure of the flowing medium of valve passage upstream reduces or the pressure of the flowing medium of the pressure of valve passage fluid downstream medium or valve passage upstream when raising reduces and the pressure rising of valve passage fluid downstream medium when existing simultaneously, the pressure difference of the flowing medium between the valve passage upstream and downstream just can reduce, at this moment, the pressure difference of the flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 just can reduce, the heart portion of the valve that comprises flap 2 that fuses just can be descending, cause the pressure of valve passage fluid downstream medium to reduce, the opening increase that reduces to cause decompression type pilot valve 39 of the pressure of valve passage fluid downstream medium, so the pressure difference of the flowing medium of the upper and lower cavity of adjusting cylinder barrel 28 just can increase, the heart portion of the valve that comprises flap 2 that fuses just can be up, the very fast stress balance position that arrives again of heart portion that these two kinds of descending and up tendencies can make the valve that comprises flap 2 that fuses, being that the opening degree of valve is very fast reaches steady state again, thereby makes the very fast steady state that reaches again of size of pressure of the medium at the size of flow of the medium that flows through valve passage and valve passage lower exit place.

When having flowing medium to flow through valve passage, the size of opening that can be by metering pin valve 44 or the extrusion by the adjusting bolt 51 on the pilot valve base 53 of regulating decompression type pilot valve 39 flow through the size of pressure of the flowing medium at the size of flow of flowing medium of valve passage or regulating valve passage lower exit place with adjusting.

When the ducted flowing medium of valve downstream was dammed, extrusion that can be by the adjusting bolt 51 on the pilot valve base 53 of regulating decompression type pilot valve 39 was with the size of the pressure of the flowing medium at regulating valve passage lower exit place.

Claims

1. direct-operated regulator is characterized in that:

Valve body (1), flap (2), flap spring (3), middle headrest material (5), positioning pressuring plate (6), valve gap (7), filler (9), gland nut (11), support (12), adjusting screw rod (13) is formed the actuator of valve, flap (2) is located on the mouth end of the logical downstream inlet of valve, can drive that adjusting screw rod (13) lower end that flap (2) moves up and down is connected with flap (2) by screw thread and fastening by pin (4), the lower end of its upper end and the adjusting cylinder adjustable lever (17) of the controlling mechanism of valve is by being threaded, and lock this connection by nut (14), valve gap (7) is conditioned that screw rod (13) passes and by middle headrest material (5), positioning pressuring plate (6) is connected with valve body (1) and is fastening by bolt (8), is provided with filler (9) between valve gap (7) and the adjusting screw rod (13) and is compressed by gland nut (11);

Scale label (18), direction board (16) are formed the indicating device of valve, scale label (18) is fixed on by screw (19), packing ring (20) and nut (21) on the support (12) of the actuator of valve, and direction board (16) is fixed on by nut (15) on the adjusting cylinder adjustable lever (17) of controlling mechanism of valve;

Regulate cylinder adjustable lever (17), regulate air cylinder base (23), piston (26), regulate cylinder barrel (28), regulate cylinder bedding and padding (29), regulate cylinder upper cover (30), regulate cylinder spring (31), regulate cylinder spring cushion block (32) and form the controlling mechanism of valve, regulate air cylinder base (23) to be connected and to pass through bolt (22) fastening with the support (12) of the actuator of valve, regulating cylinder barrel (28) lower end is connected with adjusting air cylinder base (23) by regulating cylinder bedding and padding (29), the upper end is connected with adjusting cylinder upper cover (30) by regulating cylinder bedding and padding (29), regulate air cylinder base (23), regulate cylinder barrel (28), regulate cylinder upper cover (30), regulate cylinder bedding and padding (29) by double-screw bolt (36), nut (37) is fastening as a whole, piston (26) be located at regulate in the cylinder barrel (28) and by be installed in above it O-ring seals (25) with regulate cylinder barrel (28) within wall contact will regulate cylinder barrel (28) be divided into about two chambeies, piston (26) upper end is laid and is regulated cylinder spring (31), regulating cylinder spring (31) props up on adjusting cylinder upper cover (30) by regulating cylinder spring cushion block (32), piston (26) lower end by screw thread with pass the upper end of support (12) and be connected and lock by nut (27) with the adjusting cylinder adjustable lever (17) of regulating air cylinder base (23), the lower end of adjusting cylinder adjustable lever (17) is connected with the adjusting screw rod (13) of the actuator of valve by screw thread and locks this connection by nut (14), and adjusting air cylinder base (23) is conditioned cylinder adjustable lever (17) place of passing O-ring seals (24) is installed;

Copper elbow (33), hexagonal socket (34), copper pipe (38), decompression type pilot valve (39), contiguous block (40), cross fitting (41), flanged joint (42), tee union (43), needle-valve (44), nut) (45) form the control mechanism of valve, decompression type pilot valve (39) is linked by contiguous block (40) and is regulated the back that cylinder upper cover (30) upward is positioned at adjusting cylinder barrel (28), decompression type pilot valve (39) has three connection mouth A, B, C, first connection mouth is that the A mouth is by pipe joint (35), copper pipe (38), nut (45) and flanged joint (42) are linked on the flange of inlet of valve passage upstream, second connection mouth is that the B mouth is by pipe joint (35), copper pipe (38) and nut (45) are linked on first connection mouth of tee union (43), second connection mouth of tee union (43) is linked the cavity of resorption of regulating cylinder barrel (28) by hexagonal socket (34), the 3rd connection mouth of tee union (43) is connected with the import of needle-valve (44), the outlet of needle-valve (44) is by pipe joint (35), one of copper pipe (38) and nut (45) and cross fitting (41) lead to and connect, and following place is linked in the other threeway of cross fitting (41) respectively: by pipe joint (35), copper pipe (38), nut (45), copper elbow (33), hexagonal socket (34) is connected to the epicoele of regulating cylinder barrel (28); The 3rd connection mouth of linking decompression type pilot valve 39 by pipe joint (35), copper pipe (38) and nut (45) is on the C mouth; Link by copper pipe (38), nut (45) and flanged joint (42) on the flange in outlet port in valve passage downstream.