WO2016015620A1 - 调节器的执行器及流体调节器 - Google Patents

调节器的执行器及流体调节器 Download PDF

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Publication number
WO2016015620A1
WO2016015620A1 PCT/CN2015/085279 CN2015085279W WO2016015620A1 WO 2016015620 A1 WO2016015620 A1 WO 2016015620A1 CN 2015085279 W CN2015085279 W CN 2015085279W WO 2016015620 A1 WO2016015620 A1 WO 2016015620A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm assembly
actuator
valve stem
valve
diaphragm
Prior art date
Application number
PCT/CN2015/085279
Other languages
English (en)
French (fr)
Inventor
类彦威
Original Assignee
费希尔久安输配设备(成都)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 费希尔久安输配设备(成都)有限公司 filed Critical 费希尔久安输配设备(成都)有限公司
Priority to US15/500,483 priority Critical patent/US10443748B2/en
Priority to EP15828177.4A priority patent/EP3176478B1/en
Publication of WO2016015620A1 publication Critical patent/WO2016015620A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • G05D16/0661—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane characterised by the loading mechanisms of the membrane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7809—Reactor surface separated by apertured partition
    • Y10T137/782—Reactor surface is diaphragm
    • Y10T137/7821—With valve closing bias

Definitions

  • This invention relates to the field of fluid control, and more particularly to actuators and fluid regulators for regulators.
  • the pressure of the fluid supply system for a universal fluid distribution system may vary with system requirements, climate, supply, and/or other factors, and in order to meet most end devices, the fluid needs to meet a predetermined pressure and be at or below the fluid regulator. Maximum capacity transfer requirements, fluid regulators are implemented in these distribution systems to ensure that the requirements of the terminal equipment are met.
  • FIG. 1 shows a conventional fluid regulator 100.
  • the fluid regulator 100 generally includes an actuator 12 and a regulator valve 14.
  • the regulator valve 14 has a fluid inlet 30 for receiving from, for example, a fluid distribution system, and a fluid outlet 34 for delivering to the terminal device.
  • the valve 14 of the regulator includes a valve port 28 disposed between the fluid inlet 30 and the fluid outlet 34. The transfer of fluid from the fluid inlet 30 to the fluid outlet 34 must be made through the valve port 28.
  • the regulator valve 14 also includes a valve stem 26, a valve flap 32.
  • the valve flap 32 is disposed at an end of the valve stem 26 at one end of the regulator valve 14, and the valve flap 32 and the valve stem 26 may be integrally connected.
  • the flap 32 is adapted to move between a closed position in which the valve port 28 is engaged and an open position away from the valve port 28, and the valve stem 26 is used to drive the flap 32 to move between a closed position and an open position.
  • the actuator 12 is coupled to the regulator valve 14 to ensure that the pressure at the fluid outlet 34 of the regulator valve 14, i.e., the outlet pressure, meets the desired outlet pressure.
  • Actuator 12 is in communication with regulator valve 14 and may allow fluid to pass therethrough.
  • the actuator 12 includes a control spring 22, a housing 24, a diaphragm 18, an upper tray 16 and a lower tray 20.
  • the outer casing 24 and diaphragm 18 define a bore that is in communication with the fluid outlet 34 of the regulator 14 and that can allow fluid to pass therethrough, and the diaphragm 18 is used to sense the outlet pressure of the regulator valve 14.
  • a control spring 22 is disposed in the outer casing 24 and engages the upper tray 16 at the top of the diaphragm 18.
  • the required outlet pressure is therefore set based on the control spring 22.
  • the diaphragm 18 is also coupled to the valve stem 26 of the regulator 14, and the upper tray 16, the diaphragm 18 and the lower tray 20 are integrally connected by a valve stem 26 and a stem nut 36.
  • the diaphragm 18 moves the valve stem 26 based on the sensed pressure, and the valve stem 26 drives the valve flap 32 to move together, thereby controlling the opening and closing of the regulator valve 14, thereby effecting the adjustment of the pressure of the fluid outlet 34.
  • the diaphragm 18 senses a greater pressure to cause the regulator stem 26 to move to drive the flap 32 to the closed position of the valve port 28 thereby Seal the valve port.
  • the regulator is closed so that the fluid outlet pressure no longer rises.
  • an actuator and a fluid regulator of a regulator are provided to prevent the valve core assembly from being deformed and damaged by excessive stress.
  • an actuator is provided, the actuator being coupled to one end of a valve stem, the actuator comprising: a housing; a limiting member, the limiting member is located on an inner wall of the housing; a diaphragm assembly, the membrane The sheet assembly is housed in the outer casing, and the diaphragm assembly is movably sleeved on the valve stem; the elastic member is received in the outer casing, the elastic member is coupled to the diaphragm assembly, and the membrane is Between the sheet assembly and the end of one end of the valve stem, the sleeve is movably movably coupled to the valve stem; wherein an inner diameter of a portion of the limiting member contacting the outer casing is smaller than an outer portion of the diaphragm assembly And the above-mentioned limiting member is located above the diaphragm assembly.
  • the limiting member is a protrusion or a rib.
  • the diaphragm assembly includes a diaphragm, an upper tray and a lower tray respectively fixed to upper and lower sides of the diaphragm, and the upper portion of the diaphragm assembly is the upper tray.
  • the lower tray has an inverted T-shaped cross section, and the lower tray is provided with a central through hole.
  • the diaphragm and the upper tray are fixedly sleeved on the outer side of the central through hole, and the diaphragm assembly is moved through the central through hole.
  • the ground sleeve is connected to the outside of one end of the valve stem.
  • the valve stem is provided with a boss, and an upper portion of the boss is located in the outer casing and on a lower side of the diaphragm assembly, and the lower tray is in contact with the boss.
  • the lower tray is provided with a recess for receiving the above-mentioned boss.
  • the actuator further includes: a sealing member disposed between the valve stem and the diaphragm assembly, and the sealing member is received in a recess provided in the valve stem or recessed on the lower tray Inside the slot.
  • the above sealing member is a rubber member or an elastic member made of metal.
  • the elastic member is a spring or rubber member.
  • a fluid regulator comprising an actuator as described above.
  • the fluid regulator further includes: a valve, wherein the valve is coupled to the actuator; wherein the valve comprises: a valve body; a fluid passage through the valve body, having an inlet and an outlet; a valve stem; a valve port, which defines In the fluid passage described above, a valve flap is disposed in the valve body.
  • the elastic element is slidably engaged at one end of the valve stem, and the elastic component is coupled with the diaphragm assembly, and the upper part of the diaphragm assembly (accommodated in the outer casing) is limited a limiting structure between the bit member (located on the inner wall of the outer casing and above the diaphragm assembly) (the inner diameter of the portion of the limiting member in contact with the outer casing is smaller than the outer diameter of the upper portion of the diaphragm assembly), when the fluid outlet is excessively large
  • the valve stem can be simultaneously subjected to a downward buffering force by the elastic member, that is, the valve stem buffers the upward stress to a certain extent.
  • valve core assembly is composed of a valve stem, a valve flap and a valve port
  • the actuator and the fluid regulator of the regulator of the above structure can solve the problem that the valve stem, the valve flap and the valve port of the valve core assembly are deformed or even damaged due to the stress generated by the fluid outlet being too high, thereby realizing the problem.
  • the technical effect of protecting the spool assembly when the fluid outlet stress is too high.
  • Figure 1 is a side cross-sectional view of a conventional fluid regulator
  • Figure 2 is a side cross-sectional view of the actuator of the adjuster of one embodiment of the present disclosure
  • Figure 3 is a side cross-sectional view of a fluid regulator in accordance with one embodiment of the present disclosure
  • Figure 4 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • Figure 5 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • Figure 6 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • Figure 7 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • Figure 8 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • FIG. 9 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure.
  • the actuator 200 includes a housing 203, a limiting member 205 on the inner wall of the housing 203, a diaphragm assembly 204 housed in the housing 203, the limiting member 205 is located above the diaphragm assembly 204, and the actuator is connected to the regulator One end of the stem.
  • the outer casing 203 includes a spring sleeve 210 and a lower membrane cover 211.
  • the stop member 205 is located on the inner wall of the outer casing 203 and above the diaphragm assembly 204 (as shown in FIG. 2). As a preferred embodiment, the stop member 205 is located on the inner wall of the spring sleeve 210.
  • the limiting member 205 may be a protrusion located on the inner wall of the outer casing 203 or a reinforcing rib.
  • the protrusion may be a protrusion formed by a change in the inner diameter of the outer casing 203, as shown in FIG. 2; the protrusion may also be located on the inner wall of the outer casing 203, from the inner wall of the outer casing 203 to the outer casing 203. a projecting portion extending in the axial direction, as shown in FIG. 7, a retaining member 705 (FIG.
  • the reinforcing rib may be located on the inner wall of the outer casing
  • the member extending downward along the side wall of the casing may be columnar, strip or braided, or the rib may be the top of the inner wall of the casing (Fig. 8, Fig. 9).
  • the downwardly extending members in the direction shown may be cylindrical, strip or braided, with Figures 8 and 9 showing two preferred constraining configurations, and Figures 8 and 9 are examples of stiffeners.
  • a cross-sectional view (Fig. 8 shows a limit structure 805 of six ribs, and Fig. 9 shows a limit structure 905 of eight ribs). In practice, those skilled in the art can provide the projections or ribs as needed.
  • the diaphragm assembly 204 is located within the outer casing 203, and the diaphragm assembly 204 includes a diaphragm 218, an upper tray 216 and a lower tray 220, and the diaphragm 218 is fixedly mounted in the outer casing 203, the upper tray 216 and the lower
  • the trays 220 are fixedly coupled to the upper and lower sides of the diaphragm 218, respectively, to form a sub-assembly, that is, the diaphragm assembly 204 is integrally connected.
  • the inner diameter of the portion of the limiting member 205 that is in contact with the outer casing 203 is smaller than the outer diameter of the upper portion of the diaphragm assembly, and the upper portion of the diaphragm assembly 204 may be the upper tray 216.
  • the diaphragm assembly 204 is slidably engaged on one end of the valve stem 212 that mates with the actuator, and the diaphragm assembly 204 and the valve stem 212 are relatively movable.
  • the valve stem 212 is provided with a boss 214.
  • the upper portion of the boss 214 is located in the outer casing 203 and on the lower side of the diaphragm assembly 204, that is, in the direction shown in FIG. 2, the upper portion of the boss 214 may be located on the diaphragm 218 and below.
  • the boss 214 may be a boss that is concentric with the valve stem 212, or may be a non-concentric boss.
  • the diaphragm assembly 204 is in contact with the boss 214 on the valve stem 212.
  • the lower tray 220 of the diaphragm assembly 204 is in contact with the boss 214 on the valve stem 212.
  • Actuator 200 also includes a resilient member 226 disposed within housing 203.
  • the elastic member 226 is received in the outer casing 203, and the elastic member 226 is coupled to the diaphragm assembly 204 and disposed between the diaphragm assembly 204 and the end of one end of the valve stem 212.
  • the end of the valve stem 212 can be at one end. It is a stem nut 213, and the elastic member 226 is movably sleeved on the valve stem in a compressed manner. In the initial state, the elastic member 226 is configured in a compressed state. And the elastic force of the elastic member 226 should meet the closing force required by the product, that is, the valve port of the elastic member 226 should be ensured (not shown in FIG. 2, the valve port is driven by the valve stem 212 to connect the valve flap with the valve stem 212) To achieve open or closed) can be closed normally.
  • the elastic member 226 is movably sleeved on one end of the valve rod 212 that cooperates with the diaphragm assembly 204, and the upper end of the elastic member 226 can abut against the valve stem nut 213, and the lower end of the elastic member 226 is coupled to The diaphragm assembly 204 is on the upper side.
  • the elastic member 226 may be a spring or rubber material member. Preferably, it may be a universal spiral spring, a butterfly spring, a conical spring or a rubber material as shown in FIG.
  • a sealing member 222 is disposed between the valve stem 212 and the diaphragm assembly 204.
  • a groove for receiving the sealing member 222 is provided on the valve stem 212 or on the lower tray 220, and the groove may be annular.
  • Valve stem 212 and diaphragm assembly 204 are dynamic seal structures.
  • the sealing member 222 is preferably a rubber member (for example, an O-ring) or an elastic member made of metal.
  • the sealing member 222 may be a metal C-ring or a metal O-ring.
  • the cross-sectional view of the lower tray 220 may be an inverted T-shape, and the lower tray 220 is provided with a central through hole 221, and the diaphragm 218 and the upper tray 216 are fixedly sleeved outside the central through hole 221 of the lower tray 220, and the diaphragm assembly 204 is movably sleeved on the outer side of one end of the valve stem 212 via the central through hole 221 of the lower tray 220, and the diaphragm assembly 204 can be tightly attached to the diaphragm 218 and the upper tray 216 and the lower tray 220 of the lower tray 220 by nuts. Solid together to achieve the purpose of a fixed connection.
  • the lower tray 220 is provided with a recess for receiving the boss 214.
  • the diaphragm assembly 204 is movable relative to the housing 203.
  • the diaphragm 218 is subjected to upward pressure in the direction shown in Figure 2, the diaphragm assembly 204 is moved upwardly in the direction shown in Figure 2 while compressing.
  • the elastic member 226, that is, the elastic member 226 is continuously compressed from the initial state until the upper tray 216 is in contact with the stopper member 205 on the inner wall of the outer casing 203, and the inner diameter of the portion of the stopper member 205 contacting the outer casing 203 is smaller than the diaphragm assembly.
  • the outer diameter of the upper portion of the 205 is smaller than the outer diameter of the upper tray 216, and the stop member 205 is positioned above the diaphragm assembly 204 to achieve the limit.
  • the pressure acts on the diaphragm assembly 204 when the diaphragm 218 senses that the upward pressure shown in FIG. 2 exceeds the permissible pressure.
  • the diaphragm assembly 204 i.e., the upper tray 216, the diaphragm 218, and the lower tray 220, are moved upward relative to the valve stem 212 and the outer casing 203 (as shown in Figure 2) in the direction shown in Figure 2, while the resilient member 226 is compressed.
  • the spool assembly is now restrained, that is, the valve stem 212, the valve flap and the valve port (not shown in FIG. 2) are Limit, forming a limit structure.
  • a gap may be generated between the boss 214 of the valve stem 212 and the lower tray 220, since the valve stem 212 is disposed between the diaphragm assembly 204 and the diaphragm assembly 204.
  • the sealing member 222 is disposed, and the sealing member 222 is disposed in the annular groove on the valve stem 212 or the lower tray 220 so that no leakage occurs. Due to the limiting structure between the diaphragm assembly 204 and the outer casing 203, an excessively high force acts on the limiting member 205 on the inner wall of the outer casing 203 via the diaphragm assembly 204 and the upper tray 216, and the valve stem 212 and the diaphragm Between the components 204 is a dynamic sealing structure, and the valve core assembly, that is, the valve stem 210, the valve flap and the valve port (not shown in FIG.
  • the actuator further includes a biasing member 224 disposed in the outer casing 203, coupled to the diaphragm assembly 204, and configured to apply a biasing force on the valve stem 212 via the diaphragm assembly 204.
  • the biasing member The 224 may be a spring having an upper end secured to the spring sleeve 210 of the outer casing 203 and a lower end coupled to the upper side of the diaphragm assembly 204.
  • Fluid regulator 300 is a side cross-sectional view of a fluid regulator, ie, a fluid regulator including the actuator described in the above embodiments, in accordance with an embodiment of the present disclosure.
  • Fluid regulator 300 can include an actuator 301 and a valve 302.
  • the valve 302 includes a valve body 328, a spool assembly 306, a fluid passage defined by a fluid inlet 330 and a fluid outlet 332 on the valve body 328, the fluid passage being defined through the valve body 328.
  • the spool assembly 306 includes a valve stem 312, a valve port 334 and a valve flap 336.
  • Valve port 334 is defined between fluid inlet 330 and fluid outlet 332 of the fluid passageway through which fluid is to be transferred between fluid inlet 330 and fluid outlet 332.
  • the valve flap 336 is disposed within the fluid passage and is coupled to the valve stem 312 for driving the valve flap 336 to move between a closed position that engages the valve port 334 and an open position that exits the valve port 334.
  • Actuator 301 is coupled to valve 302.
  • the actuator 301 includes a housing 303, a diaphragm assembly 304 housed in the housing 303, and a limiting member 305 on the inner wall of the housing 303.
  • the outer casing 303 includes a spring sleeve 310 and a lower membrane cover 311.
  • the stop member 305 is located on the inner wall of the outer casing 303 and above the diaphragm assembly 304 (as shown in FIG. 3). As a preferred embodiment, the stop member 305 is located on the inner wall of the spring sleeve 310.
  • the limiting member 305 may be a protrusion located on the inner wall of the outer casing 303 or may be a reinforcing rib.
  • the protrusion may be a protrusion formed by a change in the inner diameter of the outer casing 303, as shown in FIG. 3; the protrusion may also be located on the inner wall of the outer casing 303, from the inner wall of the outer casing 303 to the outer casing 303.
  • a projecting portion extending in the axial direction, as shown in FIG. 7, a retaining member 705 (FIG. 7 is a side cross-sectional view of the fluid regulator of an embodiment); the reinforcing rib may be located on the inner wall of the outer casing 303.
  • the member extending downward along the side wall of the casing may be columnar, strip-shaped or meandering, or the reinforcing rib may be the top of the inner wall of the outer casing (as shown in FIG.
  • the downwardly extending member of the direction shown in Fig. 9 may be columnar, strip or braided. In practice, those skilled in the art can provide the projections or ribs as needed.
  • the diaphragm assembly 304 is located within the outer casing 303, and the diaphragm assembly 304 includes a diaphragm 318, an upper tray 316 and a lower tray 320, and the diaphragm 318 is fixedly mounted in the outer casing 303, the upper tray 316 and the lower
  • the trays 320 are fixedly connected to the upper and lower sides of the diaphragm 318, respectively, to form a sub-assembly, that is, an integral connection.
  • the inner diameter of the portion of the limiting member 305 in contact with the outer casing 303 is smaller than the outer diameter of the upper portion of the diaphragm assembly 304, and the upper portion of the diaphragm assembly 304 may be the upper tray 316.
  • the diaphragm assembly 304 is movably sleeved on the valve stem 312.
  • the diaphragm assembly 304 is movable relative to the valve stem 312.
  • the valve stem 312 is provided with a boss 314.
  • the upper portion of the boss 314 is located in the outer casing 303 and is in the diaphragm assembly.
  • the lower side of the 304, that is, in the direction shown in FIG. 3, the upper portion of the boss 314 may be located in a chamber defined by the diaphragm 318 and the lower film cover 311, and the boss 314 may be a boss that is concentric with the valve stem 312. It can also be a non-coaxial boss.
  • the boss 314 is in contact with the lower tray 320 of the diaphragm assembly 304.
  • the diaphragm assembly 304 is movable relative to the outer casing 303 during operation of the fluid regulator 300.
  • the diaphragm 318 and the lower membrane cover 311 of the outer casing 303 define a bore 338 that is in communication with the fluid outlet 332 and that allows fluid to pass therethrough such that the diaphragm 318 senses the fluid outlet pressure of the valve 302.
  • the diaphragm 318 senses excessive pressure due to leakage of the valve port 334 or water hammer phenomenon via the bore 338, ie the diaphragm 318 is subjected to upward pressure, the diaphragm assembly 304 is moved upward, and the diaphragm assembly 304
  • the upper tray 316 is in contact with the limiting member 305 on the inner wall of the outer casing 303, and functions as a limit, that is, the diaphragm assembly 304 and the limiting member 305 form a limiting structure.
  • the limiting member 305 and the outer casing The inner diameter of the portion in contact with 303 is smaller than the outer diameter of the upper portion of the diaphragm assembly 304, and the upper portion of the diaphragm assembly 304 may be the upper tray 316.
  • the elastic member 326 is received in the outer casing 303, and the elastic member 326 is coupled to the diaphragm assembly 304 and disposed between the end of the diaphragm assembly 304 and the valve stem 312.
  • the end of the valve stem 312 can be It is a stem nut 313, and the elastic member 326 is movably sleeved on the valve stem 312 in a compressed manner.
  • the elastic member 326 is configured to be in a compressed state.
  • the elastic force of the elastic member 326 should meet the closing force required by the product, that is, the elastic force of the elastic member 326 should ensure that the valve port 334 can be normally closed.
  • the upper end of the elastic member 326 can abut against the valve stem nut 313, and the lower end of the elastic member 326 is coupled to the upper side of the diaphragm assembly 304 so as to be compressively slidably engaged with the valve stem 312 that cooperates with the diaphragm assembly 304.
  • the resilient member 326 is movably sleeved on the valve stem 312 and is compressed between the stem nut 313 and the diaphragm assembly 304.
  • Flexibility Element 326 can be a spring or rubber component, preferably a universal spiral spring, a butterfly spring, a conical spring or a rubber component.
  • a sealing member 322 is disposed between the valve stem 312 and the diaphragm assembly 304.
  • the valve stem 312 and the diaphragm assembly 304 are dynamic sealing structures, and the valve stem 312 or the lower tray 320 is provided with a recess for receiving the sealing member 322, and the recess may be annular.
  • the sealing member may preferably be a rubber member (O-ring) or an elastic member made of metal, and preferably may be a metal C-ring or a metal O-ring.
  • the cross-sectional view of the lower tray 320 may be an inverted T-shape and is provided with a central through hole 321 thereon.
  • the diaphragm 318 and the upper tray 316 are fixedly sleeved outside the central through hole 321 of the lower tray 320, and the diaphragm assembly 304 is passed through
  • the central through hole 321 of the tray 320 is slidably sleeved on the outer side of one end of the valve stem 312, and the fixed connection of the diaphragm assembly 304 can be fastened by the nut to the diaphragm 318 and the upper tray 316 and the lower tray 316 which are sleeved on the lower tray 320.
  • the lower tray 320 may be provided with a recess for receiving the boss 314.
  • the actuator further includes a biasing member 324 disposed in the outer casing 303, coupled to the diaphragm assembly 304, and configured to apply a biasing force on the valve stem 312 via the diaphragm assembly 304.
  • the biasing member 324 may be a spring having an upper end fixed to the outer casing 303 and a lower end coupled to the upper side of the diaphragm assembly 304.
  • valve flap 336 When the valve flap 336 is opened, fluid is delivered from the fluid inlet 330 through the valve port 334 to the fluid outlet 332, at which point the pressure at the fluid outlet 332 rises. When the pressure at the fluid outlet 332 exceeds the demand pressure, the valve flap 336 is in sealing contact with the valve port 334 such that the pressure at the fluid outlet 332 no longer rises.
  • the sealing effect of the valve flap 336 and the valve port 334 decreases, and the fluid regulator 300 leaks when closed, so that the pressure at the fluid outlet 332 is always raised, even equal to the fluid inlet.
  • a pressure of 330, or a range of pressure fluctuations at the fluid outlet 332, such as a water hammer phenomenon, will cause a sudden increase in pressure at the fluid outlet 332, which acts on the diaphragm 318 via the bore 338.
  • the diaphragm assembly 304 is moved upward relative to the valve stem 312 and the spring sleeve 310 of the outer casing 303 in the direction shown in FIG.
  • the sheet assembly 304 is moved upward in the direction shown in FIG. 3 to the upper tray 316 and the limiting member 305 are in contact with each other, and the inner diameter of the portion of the limiting member 305 contacting the outer casing 303 is smaller than the outer diameter of the upper portion of the diaphragm assembly 304.
  • the upper portion of the diaphragm assembly 304 (direction shown in Figure 3) may be the upper tray 316 such that the diaphragm assembly 304 is constrained.
  • the resilient member 326 can be a spring or rubber component.
  • a gap may be created between the boss 314 of the valve stem 312 and the lower tray 320, since a sealing element is provided between the valve stem 312 and the diaphragm assembly 304. 322, and the sealing member 322 is disposed in the annular groove on the valve stem so that no leakage occurs.
  • valve flap 336 and the valve port 334 are only subjected to forces generated by the compression of the resilient member 326 during this process, so that the force (stress) received by the spool assembly 306 is buffered, thereby protecting the valve stem 312 and valve of the spool assembly.
  • the flap 336 and the valve port 334 are not damaged by excessive force (stress).
  • FIG. 4 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure, wherein the resilient member 426 in the fluid regulator 400 is a conical spring.
  • 5 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure, wherein the resilient member 526 in the fluid regulator 500 is a butterfly spring.
  • 6 is a side cross-sectional view of a fluid regulator in accordance with another embodiment of the present disclosure, wherein the resilient member 626 in the fluid regulator 600 is an elastomeric rubber block. It should be noted that other components and operation modes of the fluid regulator shown in FIG. 4, FIG. 5 and FIG. 6 can be processed by the same or similar components and operation modes as the fluid fluid regulator of the embodiment shown in FIG. I will not repeat them here.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)
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Abstract

一种调节器的执行器，该执行器连接阀杆(212/312)的一端，执行器包括：外壳(203/303)；限位部件(205/305)，限位部件(205/305)设于外壳(203/303)内壁上；膜片组件(204/304)，膜片组件(204/304)容纳于外壳(203/303)内，并且膜片组件(204/304)活动套接在阀杆(212/312)上；弹性元件(226/326)，弹性元件(226/326)容纳于外壳(203/303)内，弹性元件(226/326)与膜片组件(204/304)相耦接，并在膜片组件(204/304)与阀杆(212/312)的一端的端头之间，以压缩的方式活动套接在阀杆(212/312)上；其中，限位部件(205/305)与外壳(203/303)接触之处的内径小于膜片组件(204/304)上部的外径，并且限位部件(205/305)位于膜片组件(204/304)的上方。具有该执行器的流体调节器。该执行器解决了调节器中因过高的应力导致阀杆、阀瓣、阀口的变形，甚至损坏的技术问题，使得阀芯组件的阀杆、阀瓣及阀口在受到过大的应力时，得到一定程度的缓冲，从而避免损坏。

Description

调节器的执行器及流体调节器 技术领域
本发明涉及流体控制领域，特别是涉及调节器的执行器及流体调节器。
背景技术
通用的流体分布系统供应流体的压强可能会随系统需求、气候、供应源、和/或其他因素而变化，而为了满足大多数终端设备需要流体符合预定压强、并处于或低于流体调节器的最大容量的传送要求，流体调节器被实现在这些分布系统中以确保满足终端设备的要求。
图1示出了一种传统的流体调节器100。该流体调节器100通常包括执行器12和调节器阀14。
调节器阀14具有用于从例如流体分布系统接收流体入口30，以及用于向终端设备传送流体出口34。调节器的阀14包括设置在流体入口30与流体出口34之间的阀口28。流体从流体入口30到流体出口34之间的传送必须穿过阀口28进行。调节器阀14还包括阀杆26，阀瓣32。阀瓣32设于阀杆26的位于调节器阀14内一端的端部，并且阀瓣32与阀杆26可以连接为整体。阀瓣32适于在接合阀口28的关闭位置及离开阀口28的打开位置之间移动，阀杆26用于驱动阀瓣32在关闭位置及打开位置之间移动。
执行器12耦接到调节器阀14以确保调节器阀14的流体出口34处的压强，即为出口压强，符合所需的出口压强。执行器12与调节器阀14之间是连通的且可以允许流体通过。执行器12包括控制弹簧22，外壳24，膜片18，上托盘16及下托盘20。外壳24与膜片18限定与调节器14的流体出口34是连通的且可以允许流体通过的孔腔，膜片18用于感测调节器阀14的出口压强。控制弹簧22设置在外壳24中，并接合膜片18顶部的上托盘16。因此需要的出口压强基于控制弹簧22来设置。膜片18还耦接到调节器14的阀杆26，并且上托盘16，膜片18和下托盘20通过阀杆26及阀杆螺母36连接为一体。膜片18基于感测到的压强来带动阀杆26运动，阀杆26驱动阀瓣32一起运动，从而控制调节器阀14的开启和关闭，进而达到调整流体出口34的压力的作用。
当调节器正常工作时，流体出口34压力升高超过了出口的需求压力时，膜片18感测到较大压强从而带动调节器阀杆26运动驱动阀瓣32达到阀口28的关闭位置从而密封住阀口。调节器关闭使得流体出口压力不再升高。
随着调节器工作时间的增长，阀瓣32与阀口28之间的密封效果会下降，调节器关闭时会发生泄漏，此时流体出口34压力会一直升高，甚至等于进口压力，或者流体出口34压力波动范围过大，例如水锤现象，导致流体出口34压力突然升高。此时，由于流体出口34的压力产生的作用于膜片18的力会全部传递到阀芯组件的阀杆26、阀瓣32、阀口28上，而过高的应力会导致阀杆、阀瓣、阀口的变形，甚至损坏，产生危险。
因此，针对上述问题，提供一种调节器的执行器及流体调节器，防止阀芯组件受到过高的应力而变形、损坏。
发明内容
本发明的一个方面，提供一种调节器的执行器，该执行器连接阀杆的一端，上述执行器包括：外壳；限位部件，上述限位部件位于外壳内壁上；膜片组件，上述膜片组件容纳于上述外壳内，并且上述膜片组件活动套接在上述阀杆上；弹性元件，上述弹性元件容纳于上述外壳内，上述弹性元件与上述膜片组件相耦接，并在上述膜片组件与上述阀杆的一端的端头之间，以压缩的方式活动套接在上述阀杆上；其中，上述限位部件与上述外壳接触的部分的内径小于上述膜片组件的上部的外径，并且上述限位部件位于上述膜片组件的上方。
上述限位部件为凸出部或加强筋。
上述膜片组件包括：膜片、分别固定在上述膜片上下两侧的上托盘和下托盘，上述膜片组件上部为上述上托盘。
上述下托盘的截面图为倒T形，且上述下托盘上设置有中心通孔，上述膜片和上述上托盘固定套接在上述中心通孔的外侧，上述膜片组件经由上述中心通孔活动地套接在上述阀杆的一端的外侧。
上述阀杆上设有凸台，且上述凸台的上部位于上述外壳内且在上述膜片组件下侧，上述下托盘与上述凸台相接触。
上述下托盘上设有容纳上述凸台的凹槽。
上述执行器还包括：密封元件，上述密封元件设置于上述阀杆与上述膜片组件之间，且上述密封元件容纳于上述阀杆上设置的凹槽内或容纳于上述下托盘上设置的凹槽内。
上述密封元件为橡胶部件或金属制成的弹性部件。
上述弹性元件为弹簧或者橡胶材质的部件。
本发明的另一个方面，提供一种流体调节器，包含如上所述的执行器。
上述流体调节器，还包括：阀，上述阀与上述执行器耦接；其中，上述阀包括：阀体；流体通道，其通过上述阀体，具有入口与出口；阀杆；阀口，其限定在上述流体通道内；阀瓣，其被设置在上述阀体内。
通过本发明提供的调节器的执行器及流体调节器，在阀杆的一端活动套接弹性元件，并且弹性元件与膜片组件相耦接，结合膜片组件上部(容纳于外壳内)与限位部件(位于外壳内壁上，且位于膜片组件的上方)之间的限位结构(限位部件与外壳接触的部分的内径小于膜片组件上部的外径)，当流体出口产生过大的应力时，使得在阀杆受到向上的应力时，阀杆可以同时受到通过弹性元件产生向下的缓冲力，也即，阀杆对该向上的应力进行一定程度的缓冲。另外，由于阀芯组件是由阀杆、阀瓣、阀口组成的整体，在阀杆对该应力进行一定程度的缓冲时，同时降低了对阀瓣、阀口的应力。这样，通过上述结构的调节器的执行器和流体调节器，可以解决由于流体出口过高产生的应力而导致阀芯组件的阀杆、阀瓣、阀口的变形，甚至损坏的问题，从而实现了在流体出口应力过高时，保护阀芯组件的技术效果。
附图说明
通过以下对附图的描述，本发明实施方式的特征和优点将变得更加容易理解，其中：
图1是一种传统流体调节器的侧面截面图；
图2是本发明公开的一个实施例的调节器的执行器侧面截面图；
图3是本发明公开的一个实施例的流体调节器侧面截面图；
图4是本发明公开的另一个实施例的流体调节器侧面截面图；
图5是本发明公开的另一个实施例的流体调节器侧面截面图；
图6是本发明公开的另一个实施例的流体调节器侧面截面图；
图7是本发明公开的另一个实施例的流体调节器侧面截面图；
图8是本发明公开的另一个实施例的流体调节器侧面截面图；
图9是本发明公开的另一个实施例的流体调节器侧面截面图。
具体实施方式
下面对优选实施方式的描述仅仅是示范性的，而绝不是对本发明及其应用或用法的限制。在各个附图中采用相同的附图标记来表示相同的部件，因此相同部件的构造将不再重复描述。
以下结合附图以及具体实施方式对本发明的技术方案做进一步说明。
图2示出了本发明公开的一个实施例的调节器的执行器侧面截面图。执行器200包括外壳203，位于外壳203的内壁上的限位部件205，容纳于外壳203中的膜片组件204，该限位部件205位于膜片组件204的上方，且该执行器连接调节器的阀杆一端。
外壳203包括弹簧套筒210和下膜盖211。
限位部件205位于外壳203的内壁上，并且位于膜片组件204(如图2所示方向)的上方，作为一种较优的实施方式，限位部件205位于弹簧套筒210的内壁上。
优选地，限位部件205，可以为位于外壳203内壁上的凸出部，或为加强筋。该凸出部可以为通过外壳203本身内径大小的改变形成的凸出部，如图2所示限位部件205；该凸出部也可以为位于外壳203内壁上，由外壳203内壁向外壳203的轴心方向延伸的凸出部，如图7中所示限位部件705，(图7为一种实施例的流体调节器的侧面截面图)；该加强筋可以为位于外壳内壁上，由沿着外壳侧壁(如图8，图9所示方向)向下延伸的部件，可以为柱状、条状或楞状，或者该加强筋可以为由外壳内壁的顶部(如图8，图9所示方向)向下延伸的部件，可以为柱状、条状或楞状，其中，图8，图9示出了两种优选的限位结构，且图8和图9为加强筋的实施例的截面图(图8示出了6个加强筋的限位结构805，图9示出了8个加强筋的限位结构905)。在实施中，本领域的技术人员可以实际的需要来设置该凸出部或加强筋。
膜片组件204位于外壳203内，且膜片组件204包括膜片218，上托盘216及下托盘220，并且膜片218固定安装在外壳203中，上托盘216及下 托盘220分别固定连接在膜片218的上下两侧上，形成子装配，即膜片组件204为一体式连接。
限位部件205与膜片组件204(如图2所示方向)的上下之间存在一定的间隙，允许膜片组件在一定范围内(如图2所示方向)向上运动，即向着靠近限位部件205的方向运动。限位部件205与外壳203接触的部分的内径小于该膜片组件上部的外径，膜片组件204上部可以为上托盘216。
膜片组件204活动套接在与该执行器配合的阀杆212的一端上，膜片组件204与阀杆212可相对运动。阀杆212上设有凸台214，凸台214的上部位于外壳203内且在膜片组件204下侧，即就是，如图2所示方向，凸台214的上部可以位于膜片218与下膜盖211所限定的腔室内，凸台214可以与阀杆212为同轴心的凸台，也可以为非同轴心的凸台。并且，膜片组件204与阀杆212上的凸台214相接触，具体地，膜片组件204的下托盘220与阀杆212上的凸台214相接触。
执行器200还包括设置在外壳203内的弹性元件226。弹性元件226容纳于外壳203内，弹性元件226与膜片组件204相耦接，并设于膜片组件204与阀杆212的一端的端头之间，该阀杆212的一端的端头可以为阀杆螺母213，且弹性元件226以压缩的方式活动套接在阀杆上。在初始状态下，弹性元件226被配置为压缩状态。并且弹性元件226的弹力应满足产品需要的关闭力，即弹性元件226的弹力应能保证的阀口(图2中未示出，阀口是通过阀杆212驱动与阀杆212连接的阀瓣来实现打开或关闭的)可以正常关闭。
具体的，弹性元件226压缩地活动套接在与膜片组件204相配合的阀杆212的一端上，且弹性元件226的上端可顶靠在阀杆螺母213上，弹性元件226下端耦接至膜片组件204上侧。在实施中，弹性元件226可以为弹簧或者橡胶材质的部件，优选的，可为图2中所示的通用螺旋型弹簧，蝶簧，锥形弹簧或橡胶材质的部件。
阀杆212及膜片组件204之间设有密封元件222。阀杆212上或者下托盘220上设置有容纳该密封元件222的凹槽，该凹槽可以为环形。阀杆212及膜片组件204为动密封结构。该密封元件222，比较优的，可以为橡胶部件(例如：O型圈)或金属制成的弹性部件，优选地，可以为金属C型圈，也可以为金属O型圈。
优选的，下托盘220的截面图可以为倒T型，且下托盘220上设有中心通孔221，膜片218及上托盘216固定套接在下托盘220的中心通孔221外侧，膜片组件204经由下托盘220的中心通孔221活动地套接在阀杆212的一端的外侧，膜片组件204可通过螺母将套接在下托盘220上的膜片218及上托盘216与下托盘220紧固在一起，从而实现固定连接的目的。
优选的，下托盘220上设有容纳凸台214的凹槽。
在执行器200运行过程中，膜片组件204可相对于外壳203运动，当膜片218受到以图2所示方向的向上的压力，膜片组件204以图2所示方向向上运动，同时压缩弹性元件226，即弹性元件226从初始状态下被继续压缩，直至上托盘216与外壳203内壁上的限位部件205相接触，由于限位部件205与外壳203接触的部分的内径小于膜片组件205的上部的外径，即小于上托盘216的外径，并且限位部件205位于膜片组件204的上方，达到了限位的作用。
在执行器200运行中，当膜片218感测到图2所示的向上的压力超过许用压力时，该压力作用在膜片组件204上。膜片组件204，即上托盘216，膜片218及下托盘220，以图2所示方向相对于阀杆212及外壳203(如图2所示方向)向上运动，同时弹性元件226被压缩，直至膜片组件204的上托盘216与外壳203内壁上的限位部件205相接触，这时阀芯组件被限位，即阀杆212，阀瓣及阀口(图2中未示出)被限位，形成限位结构。在此过程中，由于阀杆212与膜片组件204存在相对运动，在阀杆212的凸台214与下托盘220之间可能会产生间隙，由于阀杆212与膜片组件204之间设有密封元件222，且密封元件222设于阀杆212或下托盘220上的环形凹槽内，因此不会发生泄漏。由于膜片组件204与外壳203之间的限位结构，过高的作用力会经由膜片组件204及上托盘216作用在外壳203内壁上的限位部件205上，而阀杆212与膜片组件204之间为动密封结构，阀芯组件，即阀杆210、阀瓣及阀口(图2中未示出)，只受到弹性元件226被压缩所产生的作用力，使得阀芯组件受到的力得到了缓冲，从而保护了阀芯组件的阀杆212、阀瓣及阀口(图2中未示出)不会因受到过大的作用力而损坏。
执行器还包括偏置部件224设于外壳203中，耦接至膜片组件204，且被配置为经由膜片组件204在阀杆212上施加偏置力。具体的，偏置部件 224可以是弹簧，其上端被固定在外壳203的弹簧套筒210上，其下端被耦接至膜片组件204的上侧。
图3是本发明公开的一个实施例的流体调节器侧面截面图，即包含了上述实施例中描述的执行器的流体调节器。流体调节器300可以包括执行器301和阀302。
在本实施例中，阀302包括阀体328，阀芯组件306，由阀体328上的流体入口330及流体出口332所限定的流体通道，流体通道被限定为穿过阀体328。阀芯组件306包括阀杆312，阀口334及阀瓣336。阀口334限定在流体通道的流体入口330及流体出口332之间，流体需通过阀口334在流体入口330及流体出口332之间传送。阀瓣336设置在流体通道内并与阀杆312连接，阀杆312用于驱动阀瓣336在接合阀口334的关闭位置及离开阀口334的打开位置之间移动。
执行器301耦接到阀302。
执行器301包括外壳303，容纳于外壳303中的膜片组件304，位于外壳303的内壁上的限位部件305。
外壳303包括弹簧套筒310和下膜盖311。
限位部件305位于外壳303的内壁上，并且位于膜片组件304(如图3所示方向)的上方，作为一种较优的实施方式，限位部件305位于弹簧套筒310的内壁上。
优选地，限位部件305，可以为位于外壳303内壁上的凸出部，也可以为加强筋。该凸出部可以为通过外壳303本身内径大小的改变形成的凸出部，如图3所示限位部件305；该凸出部也可以为位于外壳303内壁上，由外壳303内壁向外壳303的轴心方向延伸的凸出部，如图7中所示限位部件705，(图7为一种实施例的流体调节器的侧面截面图)；该加强筋可以为位于外壳303内壁上，由沿着外壳侧壁(如图8，图9所示方向)向下延伸的部件，可以为柱状、条状或楞状，或者该加强筋可以为由外壳内壁的顶部(如图8，图9所示方向)向下延伸的部件，可以为柱状、条状或楞状。在实施中，本领域的技术人员可以实际的需要来设置该凸出部或加强筋。
膜片组件304位于外壳303内，且膜片组件304包括膜片318，上托盘316及下托盘320，并且膜片318固定安装在外壳303中，上托盘316及下 托盘320分别固定连接在膜片318的上下两侧上，形成子装配，即为一体式连接。
限位部件305与膜片组件304(如图3所示方向)的上下之间存在一定的间隙，允许膜片组件在一定范围内(如图3所示方向)向上运动，即向着靠近限位部件305的方向运动。限位部件305与外壳303接触的部分的内径小于该膜片组件304上部的外径，膜片组件304上部可以为上托盘316。
膜片组件304活动地套接于阀杆312上，膜片组件304与阀杆312可相对运动，阀杆312上设有凸台314，凸台314的上部位于外壳303内且在膜片组件304下侧，即就是，以图3所示方向，凸台314的上部可以位于膜片318与下膜盖311所限定的腔室内，凸台314可以与阀杆312为同轴心的凸台，也可以为非同轴心的凸台。且凸台314与膜片组件304的下托盘320相接触。
在流体调节器300运行过程中，膜片组件304可相对于外壳303运动。膜片318与外壳303的下膜盖311限定了孔腔338，该孔腔338与流体出口332是连通的且可以允许流体通过，以使得膜片318感测阀302的流体出口压强。当膜片318经由孔腔338感测到由于阀口334的泄漏或者水锤现象而导致的过大的压力，即膜片318受到向上的压力，膜片组件304向上运动，并且膜片组件304向上运动直至上托盘316与外壳303内壁上的限位部件305相接触，起到限位的作用，即膜片组件304与限位部件305形成限位结构，具体的，限位部件305与外壳303接触的部分的内径小于该膜片组件304上部的外径，膜片组件304上部可以为上托盘316。
弹性元件326容纳于外壳303内，弹性元件326与膜片组件304相耦接，并设于膜片组件304与阀杆312的一端的端头之间，该阀杆312的一端的端头可以为阀杆螺母313，且弹性元件326以压缩的方式活动套接在所述阀杆312上。且初始状态下，弹性元件326被配置为压缩状态。且弹性元件326的弹力应满足产品需要的关闭力，即弹性元件326的弹力应能保证的阀口334可以正常关闭。具体的，弹性元件326上端可顶靠在阀杆螺母313上，弹性元件326下端耦接至膜片组件304上侧，从而压缩地活动套接在与膜片组件304相配合的阀杆312的一端上。即弹性元件326活动套接在阀杆312上，且被压缩在阀杆螺母313与膜片组件304之间。弹性 元件326可为弹簧或者橡胶材质的部件，优选的，通用螺旋型弹簧，蝶簧，锥形弹簧或橡胶材质的部件。
阀杆312及膜片组件304之间设有密封元件322。阀杆312及膜片组件304为动密封结构，阀杆312或下托盘320上设置有用于容纳该密封元件322的凹槽，该凹槽可以为环形。该密封元件，优选地，可以为橡胶部件(O型圈)或金属制成的弹性部件，优选地，可以为金属C型圈，也可以为金属O型圈。
优选的，下托盘320的截面图可以为倒T型且其上设有中心通孔321，膜片318及上托盘316固定套接在下托盘320的中心通孔321外侧，膜片组件304经由下托盘320的中心通孔321活动地套接在阀杆312的一端的外侧，膜片组件304的固定连接可通过螺母将套接在下托盘320上的膜片318及上托盘316与下托盘紧固在一起。
优选的，下托盘320上可以设有容纳凸台314的凹槽。
执行器还包括偏置部件324设于外壳303中，耦接至膜片组件304，且被配置为经由膜片组件304在阀杆312上施加偏置力。具体的，偏置部件324可以是弹簧，其上端被固定在外壳303上，其下端被耦接至膜片组件304的上侧。
在流体调节器300运行过程中，当阀瓣336打开，流体从流体入口330经过阀口334传送至流体出口332送出，这时，流体出口332处压力升高。当流体出口332处压力超过了需求压力时，阀瓣336与阀口334接触密封，使得流体出口332处压力不再升高。
然而，随着流体调节器300工作时间的增长，阀瓣336及阀口334的密封效果下降，流体调节器300在关闭时会发生泄漏，使得流体出口332处压力一直升高，甚至等于流体入口330压力，或者流体出口332处压力波动范围过大，如水锤现象，将会导致流体出口332处压力突然升高，升高的压力经由孔腔338作用在膜片318上。这时，膜片组件304相对于阀杆312及外壳303的弹簧套筒310以图3所示方向向上运动，同时压缩弹性元件326，即弹性元件326从初始的压缩状态被继续压缩，直至膜片组件304以图3所示方向向上运动至上托盘316与限位部件305相互接触，限位部件305与外壳303接触的部分的内径小于该膜片组件304上部的外径， 膜片组件304的(图3所示方向)上部可以为上托盘316，从而使得膜片组件304被限位。优选地，弹性元件326可为弹簧或者橡胶材质的部件。
在膜片组件304相对于阀杆312向上运动的过程中，阀杆312的凸台314处与下托盘320之间可能会产生间隙，由于阀杆312与膜片组件304之间设有密封元件322，且密封元件322设于阀杆上的环形凹槽内，因此不会发生泄漏。因此，在流体调节器运行过程中，由于流体出口332处压力突然升高而产生的过高的力会经由膜片组件304作用在限位部件305上，而阀芯组件306的阀杆312、阀瓣336及阀口334只受到由于弹性元件326在这个过程中受到压缩而产生的力，使得阀芯组件306所受到力(应力)得以缓冲，从而保护了阀芯组件的阀杆312、阀瓣336及阀口334不会因受到过大的力(应力)而损坏。
图4为本发明是公开的另一个实施例的流体调节器的侧面截面图，其中流体调节器400中的弹性元件426为锥形弹簧。图5为本发明是公开的另一个实施例的流体调节器的侧面截面图，其中流体调节器500中的弹性元件526为蝶簧。图6为本发明是公开的另一个实施例的流体调节器的侧面截面图，其中流体调节器600中的弹性元件626为弹性橡胶块。需要说明的是，图4、图5和图6所示的流体调节器的其他元件及运行方式可以采用与图3所示实施例的流体流体调节器相同或类似的元件及运行方式进行处理，此处不再赘述。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个......”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本发明的保护范围内。

Claims (10)

  1. 一种调节器的执行器，所述执行器连接阀杆的一端，其特征在于，所述执行器包括：
    外壳；
    限位部件，所述限位部件位于外壳内壁上；
    膜片组件，所述膜片组件容纳于所述外壳内，并且所述膜片组件活动套接在所述阀杆上；
    弹性元件，所述弹性元件容纳于所述外壳内，所述弹性元件与所述膜片组件相耦接，并在所述膜片组件与所述阀杆的一端的端头之间，以压缩的方式活动套接在所述阀杆上；
    其中，所述限位部件与所述外壳接触的部分的内径小于所述膜片组件的上部的外径，并且所述限位部件位于所述膜片组件的上方。
  2. 根据权利要求1所述的执行器，其特征在于，所述限位部件为凸出部或加强筋。
  3. 根据权利要求1或2所述的执行器，其特征在于，所述膜片组件包括：膜片、分别固定在所述膜片上下两侧的上托盘和下托盘，所述膜片组件上部为所述上托盘。
  4. 根据权利要求3所述的执行器，其特征在于，所述下托盘的截面图为倒T形，且所述下托盘上设置有中心通孔，所述膜片和所述上托盘固定套接在所述中心通孔的外侧，所述膜片组件经由所述中心通孔活动地套接在所述阀杆的一端的外侧。
  5. 根据权利要求3所述的执行器，其特征在于，所述阀杆上设有凸台，且所述凸台的上部位于所述外壳内且在所述膜片组件下侧，所述下托盘与所述凸台相接触。
  6. 根据权利要求5所述的执行器，其特征在于，所述下托盘上设有容纳所述凸台的凹槽。
  7. 根据权利要求1或2所述的执行器，其特征在于，所述执行器还包括：
    密封元件，所述密封元件设置于所述阀杆与所述膜片组件之间，且所述密封元件容纳于所述阀杆上设置的凹槽内或容纳于所述下托盘上设置的凹槽内。
  8. 根据权利要求7所述的执行器，其特征在于，所述密封元件为橡胶部件或金属制成的弹性部件。
  9. 根据权利要求1或2所述的执行器，其特征在于，所述弹性元件为弹簧或者橡胶材质的部件。
  10. 一种流体调节器，其特征在于，包括如权利要求1至9中任一所述的执行器。
PCT/CN2015/085279 2014-07-28 2015-07-28 调节器的执行器及流体调节器 WO2016015620A1 (zh)

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