CN110594474B - Valve positioner gas circuit switching device and valve positioner with same - Google Patents
Valve positioner gas circuit switching device and valve positioner with same Download PDFInfo
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- CN110594474B CN110594474B CN201910950840.7A CN201910950840A CN110594474B CN 110594474 B CN110594474 B CN 110594474B CN 201910950840 A CN201910950840 A CN 201910950840A CN 110594474 B CN110594474 B CN 110594474B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 115
- 239000000758 substrate Substances 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 25
- 238000002955 isolation Methods 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010892 electric spark Methods 0.000 description 3
- 230000008713 feedback mechanism Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a valve positioner gas circuit switching device and a valve positioner with the same, wherein the valve positioner gas circuit switching device comprises a positioner shell, a piezoelectric valve and a gas circuit switching plate, the positioner shell at least comprises a substrate part, and the top surface of the substrate part is provided with a gas inlet inner interface and a gas outlet inner interface; the piezoelectric valve is positioned above the substrate part and is provided with an air inlet and an air outlet; the gas circuit adapter plate is arranged between the substrate part and the piezoelectric valve, the top surface of the gas circuit adapter plate is provided with a gas inlet up-conversion interface and a gas outlet up-conversion interface, the bottom surface of the gas circuit adapter plate is provided with a gas inlet down-conversion interface and a gas outlet down-conversion interface, and a gas inlet conversion channel communicated with the gas inlet up-conversion interface and the gas inlet down-conversion interface and a gas outlet conversion channel communicated with the gas outlet up-conversion interface and the gas outlet down-conversion interface are formed in the gas circuit adapter plate. According to the air passage switching device of the valve positioner, the piezoelectric valve and the positioner shell can be communicated through the air passage switching plate, and the connection is convenient.
Description
Technical Field
The invention relates to a valve positioner, in particular to a valve positioner gas circuit switching device and a valve positioner with the same.
Background
The electric valve positioner is a main accessory of the pneumatic control valve, and is usually matched with the pneumatic control valve, the electric valve positioner is connected with an actuator (generally, an air cylinder and the like), the actuator is connected with the pneumatic control valve, the actuator pushes a valve rod in the pneumatic control valve to move so as to change the opening degree, the electric valve positioner is linked with the actuator, the valve rod displacement of the pneumatic control valve is converted into an electric signal, the electric signal is fed back to the controller, the electric signal is compared with a set signal by the controller, and when the electric signal and the set signal deviate, the controller changes an output signal to the actuator, so that the actuator acts, and the opening degree of the pneumatic control valve is regulated to a set value. In other words, the valve positioner uses the valve rod displacement as a feedback control signal, thereby realizing the feedback control of the pneumatic regulating valve.
In the related art, the electric valve positioner comprises a shell, a feedback mechanism and a piezoelectric valve, wherein the feedback mechanism and the piezoelectric valve are arranged in the shell, the feedback mechanism is connected to an actuator, and converts displacement of a valve rod of the pneumatic regulating valve into an electric signal along with the action of the actuator and feeds the electric signal back to the controller, and the controller performs switching control on and off of the piezoelectric valve according to the electric signal. The piezoelectric valve is generally connected to the actuator through the shell, when the piezoelectric valve is opened, high-pressure gas can be provided for the actuator to push the actuator to act, and the actuator further pushes the valve rod of the pneumatic regulating valve to further regulate the opening degree of the pneumatic regulating valve, so that the feedback control of the pneumatic regulating valve is realized.
However, when the piezoelectric valve is connected to the housing, the positions of the air inlets, the air outlets and the air outlets on the housing do not correspond to each other due to various reasons, for example, other components are required to be configured for each air inlet on the housing, so that the size of the air inlet is relatively large, and the air inlets, the air outlets and the air outlets on the piezoelectric valve are small in size and very compact in arrangement, so that the positions cannot correspond to each other, and the connection is inconvenient. In addition, since the size and position of each air port on the housing is fixed, it is not possible to adapt to the same electro-valve positioner for different piezo-valves.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a valve positioner air passage switching device.
Another object of the present invention is to provide a valve positioner.
To achieve the above object, in one aspect, a valve positioner air passage switching device according to an embodiment of the present invention includes:
The locator comprises a locator shell, wherein the locator shell at least comprises a substrate part, and an air inlet external interface and an air outlet external interface are arranged on the first side surface of the substrate part; an air inlet inner interface and an air outlet inner interface are arranged on the top surface of the substrate part; an air inlet channel which is communicated with the air inlet outer interface and the air inlet inner interface and an air outlet channel which is communicated with the air outlet outer interface and the air outlet inner interface are formed in the substrate part;
a piezoelectric valve located above the base plate portion and having an air inlet and an air outlet;
the gas circuit adapter plate is arranged between the substrate part and the piezoelectric valve, the top surface of the gas circuit adapter plate is provided with a gas inlet upper switching port and a gas outlet upper switching port, the gas inlet upper switching port is opposite to a gas inlet on the piezoelectric valve, and the gas outlet upper switching port is opposite to a gas outlet on the piezoelectric valve;
The bottom surface of the gas circuit adapter plate is provided with a gas inlet down-conversion interface and a gas outlet down-conversion interface, the gas inlet down-conversion interface is staggered with the gas inlet up-conversion interface and is opposite to the gas inlet inner interface, and the gas outlet down-conversion interface is staggered with the gas outlet up-conversion interface and is opposite to the gas outlet inner interface;
and an air inlet switching channel which is communicated with the air inlet up-conversion interface and the air inlet down-conversion interface and an air outlet switching channel which is communicated with the air outlet up-conversion interface and the air outlet down-conversion interface are formed in the air circuit switching plate.
The valve positioner air passage switching device provided by the embodiment of the invention is provided with the air passage switching plate, and an air inlet upper switching port and an air outlet upper switching port on the top surface of the air passage switching plate are respectively opposite to an air inlet and an air outlet on the piezoelectric valve. The air inlet down-conversion interface and the air outlet down-conversion interface on the bottom surface of the air circuit adapter plate are respectively opposite to the air inlet inner interface and the air outlet inner interface, and an air inlet conversion channel which is communicated with the air inlet up-conversion interface and the air inlet down-conversion interface and an air outlet conversion channel which is communicated with the air outlet up-conversion interface and the air outlet down-conversion interface are formed in the air circuit adapter plate. In other words, the communication between the piezoelectric valve and the positioner shell can be realized through the gas circuit adapter plate, the connection is convenient, and the problem that the air inlet, the air outlet and the air outlet on the piezoelectric valve cannot be connected due to the fact that the positions of the air inlet and the air outlet on the piezoelectric valve are not corresponding to the positions of the air outlet on the positioner is solved. In addition, when disposing different piezoelectricity valves, can through changing different gas circuit conversion boards can to realize that different voltage valves can adapt to same locator, improve the commonality of piezoelectricity valve.
In addition, the valve positioner air passage switching device according to the above embodiment of the present invention may further have the following additional technical features:
According to one embodiment of the invention, the piezoelectric valve further comprises an exhaust port;
an exhaust outer interface is arranged on the second side surface of the substrate part, an exhaust inner interface is arranged on the top surface of the substrate part, and an exhaust channel which is communicated with the exhaust outer interface and the exhaust inner interface is formed in the substrate part;
an exhaust upper transfer port is arranged on the top surface of the gas circuit adapter plate, and the exhaust upper transfer port is opposite to an exhaust port on the piezoelectric valve;
An exhaust down-conversion interface is arranged on the bottom surface of the gas circuit adapter plate, and is staggered with the exhaust up-conversion interface and is opposite to the exhaust internal interface; and an exhaust switching channel which is communicated with the exhaust up-conversion interface and the exhaust down-conversion interface is formed in the gas circuit switching plate.
According to one embodiment of the invention, the air inlet inner interface, the air outlet inner interface and the air outlet are internally provided with isolation filters for isolating electric sparks and filtering particulate matters and moisture in the air.
According to one embodiment of the invention, the air inlet up-conversion interface and the air inlet down-conversion interface are staggered and partially overlapped, and the air inlet transfer channel is formed on the air inlet up-conversion interface and the air inlet down-conversion interface, partially overlapped, and penetrates through the air inlet up-conversion interface and the air inlet down-conversion interface from top to bottom.
According to one embodiment of the present invention, the air outlet up-conversion port and the air outlet down-conversion port are staggered and partially overlapped, and the air outlet transfer channel is formed in the air outlet up-conversion port and the air outlet down-conversion port partially overlapped and penetrates through the air outlet up-conversion port and the air outlet down-conversion port from top to bottom.
According to one embodiment of the invention, the air outlet up-conversion interface and the air outlet down-conversion interface are staggered and do not overlap, the air outlet conversion channel extends from the first side surface of the air channel adapter plate to the second side surface of the air channel adapter plate so as to enable the air outlet up-conversion interface to be communicated with the air outlet down-conversion interface, one end of the air outlet conversion channel, which is positioned on the first side surface of the air channel adapter plate, is blocked and sealed through a first plug, and the first side surface is opposite to the second side surface.
According to one embodiment of the invention, the exhaust upper transfer port and the exhaust lower transfer port are staggered and do not overlap, the exhaust transfer channel extends from the third side surface of the gas circuit transfer plate to the fourth side surface of the gas circuit transfer plate so as to enable the exhaust upper transfer port to be communicated with the exhaust lower transfer port, and one end of the exhaust transfer channel, which is positioned on the third side surface of the gas circuit transfer plate, is blocked and sealed through a second plug, and the third side surface is opposite to the fourth side surface.
According to one embodiment of the invention, a first sealing ring is arranged between the substrate part and the gas circuit adapter plate, so that the air inlet inner interface is in sealing connection with the air inlet lower adapter, the air outlet inner interface is in sealing connection with the air outlet lower adapter, and the air outlet inner interface is in sealing connection with the air outlet lower adapter;
and a second sealing ring is arranged between the gas circuit adapter plate and the piezoelectric valve, so that the gas inlet upper switching port is in sealing connection with the gas inlet, the gas outlet upper switching port is in sealing connection with the gas outlet, and the gas outlet switching port is in sealing connection with the gas outlet.
According to one embodiment of the invention, the number of the air outlets is one or two, and the number of the air outlets is two.
On the other hand, the valve positioner according to the embodiment of the invention is provided with the valve positioner gas circuit switching device.
According to the valve positioner provided by the embodiment of the invention, the air passage switching device of the valve positioner is provided, the communication between the piezoelectric valve and the positioner shell can be realized through the air passage switching plate, the connection is convenient, and the problem that the air inlet, the air outlet and the air outlet on the piezoelectric valve cannot be connected due to the fact that the positions of the air inlet and the air outlet on the piezoelectric valve are not corresponding to the positions of the air inlet on the positioner is solved. In addition, when disposing different piezoelectricity valves, can through changing different gas circuit conversion boards can to realize that different voltage valves can adapt to same locator, improve the commonality of piezoelectricity valve.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a valve positioner air circuit switching device according to an embodiment of the present invention;
FIG. 2 is an exploded view of a valve positioner air circuit switching device according to an embodiment of the present invention;
FIG. 3 is a top view of an air circuit adapter plate in an air circuit adapter device for a valve positioner according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;
FIG. 5 is a sectional view in the direction B-B in FIG. 3;
FIG. 6 is a cross-sectional view taken in the direction C-C of FIG. 3;
FIG. 7 is a first partial cross-sectional view of a positioner housing in a valve positioner air circuit switching device in accordance with an embodiment of the present invention;
FIG. 8 is a second partial cross-sectional view of a positioner housing in a valve positioner air circuit switching device in accordance with an embodiment of the present invention;
FIG. 9 is a bottom view of a piezoelectric valve (with only one air outlet) in a valve positioner air circuit switching device according to an embodiment of the present invention;
FIG. 10 is a bottom view of a piezoelectric valve (having two air outlets) in a valve positioner air circuit switching device according to an embodiment of the present invention;
FIG. 11 is a schematic view of a valve positioner according to an embodiment of the present invention.
Reference numerals:
A positioner housing 10;
A substrate portion 101;
an intake external interface 1011;
Outlet outer interfaces 1012a, 1012b;
an intake internal interface 1013;
Internal outlet ports 1014a, 1014b;
Exhaust external interfaces 1015a, 1015b;
internal exhaust ports 1016a, 1016b;
An intake passage H11;
the gas outlet channels H12a, H12b;
Exhaust passages H13a, H13b;
a piezoelectric valve 20;
An air inlet 201;
Air outlets 202, 202a, 202b;
Exhaust ports 203a, 203b;
The gas circuit adapter plate 30;
an intake upper transfer port 301;
Upper air outlet ports 302a, 302b;
Exhaust upper interfaces 303a, 303b;
an intake lower transfer port 304;
Lower outlet ports 305a, 305b;
exhaust down-converting ports 306a, 306b;
An intake switching passage H31;
the air outlet switching channels H32a and H32b;
exhaust gas switching passages H33a, H33b;
A first plug 31;
second plugs 32a, 32b.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention, and all other embodiments, based on the embodiments of the present invention, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following describes in detail the valve positioner air passage switching device according to the embodiment of the present invention with reference to the accompanying drawings.
Referring to fig. 1 to 10, the valve positioner air path switching device provided in the embodiment of the invention includes a positioner housing 10, a piezoelectric valve 20 and an air path switching board 30.
Specifically, the positioner housing 10 includes at least a base plate portion 101, and an air inlet external interface 1011 and air outlet external interfaces 1012a, 1012b are provided on a first side surface of the base plate portion 101. The top surface of the substrate 101 is provided with an inlet internal interface 1013 and outlet internal interfaces 1014a and 1014b. The substrate 101 has an air inlet channel H11 communicating the air inlet outer port 1011 and the air inlet inner port 1013, and air outlet channels H12a and H12b communicating the air outlet outer ports 1012a and 1012b and the air outlet inner ports 1014a and 1014b.
That is, the inlet inner interface 1013 of the top surface of the substrate portion 101 communicates with the inlet outer interface 1011 of the first side surface of the substrate portion 101 through the inlet passage H11 therein, and the outlet inner interfaces 1014a, 1014b of the top surface of the substrate portion 101 communicate with the outlet outer interfaces 1012a, 1012b of the first side surface of the substrate portion 101 through the outlet passages H12a, H12b therein. Wherein the air inlet outer port 1011 is for connection to an air supply device, the air outlet outer ports 1012a, 1012b are for connection to an actuator, such as a cylinder, and the air outlet outer ports 1012a, 1012b are connected to air inlet ports of the cylinder. The inlet outer port 1011 and the outlet outer ports 1012a and 1012b are provided on the first side surface of the substrate 101, so as to be connected to external gas source equipment and actuators.
The piezoelectric valve 20 is located above the base plate 101 and has an air inlet 201 and an air outlet 202 (202 a, 202 b). The gas path adapter plate 30 is disposed between the substrate 101 and the piezoelectric valve 20, an air inlet up-conversion interface 301 and air outlet up-conversion interfaces 302a and 302b are disposed on the top surface of the gas path adapter plate 30, the air inlet up-conversion interface 301 is opposite to the air inlet 201 on the piezoelectric valve 20, and the air outlet up-conversion interfaces 302a and 302b are opposite to the air outlets 202 (202 a and 202 b) on the piezoelectric valve 20. That is, when the air passage adapter plate 30 is disposed between the substrate portion 101 and the piezoelectric valve 20, the upper air inlet port 301 on the top surface of the air passage adapter plate 30 is directly communicated with the air inlet 201 on the bottom surface of the piezoelectric valve 20, and the upper air outlet ports 302a, 302b on the top surface of the air passage adapter plate 30 are directly communicated with the air outlet 202 (202 a, 202 b) on the bottom surface of the piezoelectric valve 20.
The bottom surface of the gas circuit adapter plate 30 is provided with a gas inlet down-conversion port 304 and gas outlet down-conversion ports 305a and 305b, the gas inlet down-conversion port 304 is offset from the gas inlet up-conversion port 301 and is opposite to the gas inlet inner port 1013, and the gas outlet down-conversion ports 305a and 305b are offset from the gas outlet up-conversion ports 302a and 302b and are opposite to the gas outlet inner ports 1014a and 1014 b. That is, when the air passage adapter plate 30 is disposed between the substrate portion 101 and the piezoelectric valve 20, the air inlet down-converting port 304 on the bottom surface of the air passage adapter plate 30 is directly communicated with the air inlet inner port 1013 on the top surface of the substrate portion 101, and the air outlet down-converting ports 305a, 305b on the bottom surface of the air passage adapter plate 30 are directly communicated with the air outlet inner ports 1014a, 1014b on the top surface of the substrate portion 101.
An air inlet switching channel H31 communicating the air inlet upper switching port 301 and the air inlet lower switching port 304, and air outlet switching channels H32a and H32b communicating the air outlet upper switching ports 302a and 302b and the air outlet lower switching ports 305a and 305b are formed in the air circuit switching board 30. That is, the upper air inlet switching port 301 on the top surface of the air path switching plate 30 is arranged in a staggered manner with the lower air inlet switching port 304 on the bottom surface of the air path switching plate 30, and is communicated with the air inlet switching channel H31 in the air path switching plate 30, while the upper air outlet switching ports 302a and 302b on the top surface of the air path switching plate 30 are arranged in a staggered manner with the lower air outlet switching ports 305a and 305b on the bottom surface of the air path switching plate 30, and are communicated with the air outlet switching channels H32a and H32b in the air path switching plate 30.
In other words, since the inner inlet 1013 and the inner outlet 1014a, 1014b of the positioner case 10 do not correspond to the positions of the inlet 201 and the outlet 202 (202 a, 202 b) of the piezoelectric valve 20, the upper inlet 301 and the upper outlet 302a, 302b of the top surface of the air path adapter plate 30 are arranged to correspond to the positions of the inlet 201 and the outlet 202 (202 a, 202 b) of the bottom surface of the piezoelectric valve 20 in order to achieve the connection. And the inlet down-conversion port 304 and the outlet down-conversion ports 305a, 305b on the bottom surface of the gas circuit adapter plate 30 are arranged to correspond to the positions of the inlet internal port 1013 and the outlet internal ports 1014a, 1014b on the substrate portion 101. In this case, the inlet upper transfer port 301 and the inlet lower transfer port 304 form a staggered arrangement, and the outlet upper transfer ports 302a, 302b and the outlet lower transfer ports 305a, 305b form a staggered arrangement. The air inlet transfer channel H31 in the air path transfer plate 30 is used to communicate the air inlet up-transfer interface 301 with the air inlet down-transfer interface 304, and the air outlet transfer channels H32a and H32b in the air path transfer plate 30 are used to communicate the air outlet up-transfer interfaces 302a and 302b with the air outlet down-transfer interfaces 305a and 305b, so that when the air path transfer plate 30 is arranged between the piezoelectric valve 20 and the substrate 101, the air inlet 201 of the piezoelectric valve 20 can be communicated with the air inlet internal interface 1013 on the substrate 101 through the air inlet up-transfer interface 301, the air inlet transfer channel H31 and the air inlet down-transfer interface 304, and the air outlet 202 (202 a and 202 b) of the piezoelectric valve 20 can be communicated with the air outlet internal interfaces 1014a and 1014b on the substrate 101 through the air outlet up-transfer interfaces 302a and 302b, the air outlet transfer channels H32a and H32b and the air outlet down-transfer interfaces 305a and 305 b.
In a specific application, the air inlet external interface 1011 on the first side of the substrate 101 is connected to the air source device, and the air outlet external interfaces 1012a and 1012b are connected to the actuator, so that the air provided by the air source device can sequentially enter the piezoelectric valve 20 through the air inlet external interface 1011, the air inlet channel H11, the air inlet internal interface 1013, the air inlet lower adaptor 304, the air inlet adaptor channel H31, the air inlet upper adaptor 301 and the air inlet 201. The gas output from the gas outlet 202 (202 a, 202 b) of the piezoelectric valve 20 sequentially passes through the gas outlet upper switching ports 302a, 302b, the gas outlet switching channels H32a, H32b, the gas outlet lower switching ports 305a, 305b, the gas outlet inner ports 1014a, 1014b, the gas outlet channels H12a, H12b, and the gas outlet outer ports 1012a, 1012b to enter the actuator, thereby pushing the actuator to act.
According to the valve positioner air passage switching device provided by the embodiment of the invention, the valve positioner air passage switching device is provided with the air passage switching plate 30, and an upper air inlet switching port 301 and upper air outlet switching ports 302a and 302b on the top surface of the air passage switching plate 30 are respectively opposite to an air inlet 201 and an air outlet 202 (202 a and 202 b) on the piezoelectric valve 20. The air inlet down-converting port 304 and the air outlet down-converting port 305a, 305b on the bottom surface of the air path adapter plate 30 are respectively opposite to the air inlet inner port 1013 and the air outlet inner port 1014a, 1014b, and an air inlet converting channel H31 communicating the air inlet up-converting port 301 and the air inlet down-converting port 304 and air outlet converting channels H32a, H32b communicating the air outlet up-converting ports 302a, 302b and the air outlet down-converting ports 305a, 305b are formed in the air path adapter plate 30, so that when the air path adapter plate 30 is connected between the piezoelectric valve 20 and the substrate 101, the air inlet 201 of the piezoelectric valve 20 can communicate with the air inlet inner port 1013 on the substrate 101 through the air inlet up-converting port 301, the air inlet converting channel H31 and the air inlet down-converting port 304, and the air outlet 202 (202 a, 202 b) of the piezoelectric valve 20 can communicate with the air outlet inner ports a, 1014b on the substrate 101 through the air outlet up-converting ports 302a, 302b, the air outlet down-converting channels H32b and the air outlet down-converting ports 305a, 305 b. In other words, the connection between the piezoelectric valve 20 and the positioner housing 10 can be realized through the air path adapter plate 30, which is convenient to connect, and solves the problem that the air inlet 201, the air outlet 202 (202 a, 202 b) and the air outlet 203a, 203b on the piezoelectric valve 20 cannot be connected due to the fact that the positions of the air inlet and the air outlet on the positioner are not corresponding. In addition, when configuring different piezoelectric valves 20, can through changing different gas circuit conversion boards, in order to realize that different voltage valves can adapt to same locator, improve the commonality of piezoelectric valve 20.
Referring to fig. 1-10, in some embodiments of the invention, the piezoelectric valve 20 further includes vents 203a, 203b; the second side surface of the substrate portion 101 is provided with exhaust outer ports 1015a and 1015b, the top surface of the substrate portion 101 is provided with exhaust inner ports 1016a and 1016b, and exhaust passages H13a and H13b communicating the exhaust outer ports 1015a and 1015b with the exhaust inner ports 1016a and 1016b are formed in the substrate portion 101. That is, the exhaust inner ports 1016a, 1016b on the top surface of the substrate portion 101 are communicated to the exhaust outer ports 1015a, 1015b on the second side surface of the substrate portion 101 through the exhaust passages H13a, H13b therein, and the exhaust outer ports 1015a, 1015b are used for exhausting the other to the outside atmosphere.
The top surface of the air path adapter plate 30 is provided with an exhaust upper adapter port 303a and 303b, and the exhaust upper adapter port 303a and 303b are opposite to the exhaust ports 203a and 203b on the piezoelectric valve 20. That is, when the air passage adapter plate 30 is provided between the substrate portion 101 and the piezoelectric valve 20, the exhaust upper transfer ports 303a, 303b of the top surface of the air passage adapter plate 30 are directly communicated with the exhaust ports 203a, 203b of the bottom surface of the piezoelectric valve 20.
The bottom surface of the gas circuit adapter plate 30 is provided with lower exhaust switching ports 306a and 306b, and the lower exhaust switching ports 306a and 306b are staggered with the upper exhaust switching ports 303a and 303b and are opposite to the inner exhaust ports 1016a and 1016 b; exhaust switching channels H33a and H33b which are communicated with the exhaust upper switching ports 303a and 303b and the exhaust lower switching ports 306a and 306b are formed in the gas circuit switching plate 30. That is, the exhaust upper switching ports 303a and 303b on the top surface of the air path switching board 30 are arranged in a staggered manner with the exhaust lower switching ports 306a and 306b on the bottom surface of the air path switching board 30, and are communicated with the exhaust switching channels H33a and H33b in the air path switching board 30. In a specific application, the gas exhausted from the exhaust ports 203a, 203b of the piezoelectric valve 20 is exhausted through the exhaust upper switching ports 303a, 303b, the exhaust switching channels H33a, H33b, the exhaust lower switching ports 306a, 306b, the exhaust inner ports 1016a, 1016b, the exhaust channels H13a, H13b, and the exhaust outer ports 1015a, 1015b in sequence.
In the present embodiment, the upper exhaust ports 303a and 303b on the top surface of the air path adapter plate 30 are configured to correspond to the positions of the exhaust ports 203a and 203b on the bottom surface of the piezoelectric valve 20, and the lower exhaust ports 306a and 306b on the bottom surface of the air path adapter plate 30 are configured to correspond to the inner exhaust ports 1016a and 1016b on the substrate 101. The exhaust gas transfer channels H33a and H33b in the air path transfer plate 30 are used to communicate the exhaust gas upper transfer ports 303a and 303b with the exhaust gas lower transfer ports 306a and 306b, so that when the air path transfer plate 30 is arranged between the piezoelectric valve 20 and the substrate 101, the exhaust ports 203a and 203b of the piezoelectric valve 20 can communicate with the exhaust gas inner ports 1016a and 1016b on the substrate 101 through the exhaust gas upper transfer ports 303a and 303b, the exhaust gas transfer channels H33a and H33b, and the exhaust gas lower transfer ports 306a and 306b, which is convenient to connect.
It will be appreciated that the outer gas outlet ports 1012a, 1012b, the gas outlet channels H12a, H12b, and the inner gas outlet ports 1014a, 1014b on the substrate portion 101 may be two sets, each set including one outer gas outlet port 1012a, 1012b, one inner gas outlet port 1014a, 1014b, and one gas outlet channel H12a, H12b that communicates the outer gas outlet ports 1012a, 1012b with the inner gas outlet ports 1014a, 1014 b. Similarly, the upper air outlet switching ports 302a and 302b, the air outlet switching channels H32a and H32b, and the lower air outlet switching ports 305a and 305b of the air-operated switching board may be two sets, each set including one upper air outlet switching port 302a and 302b, one lower air outlet switching port 305a and 305b, and one air outlet switching channel H32a and H32b that connects the upper air outlet switching ports 302a and 302b and the lower air outlet switching ports 305a and 305 b.
In this way, the valve positioner can be adapted to different actuators, for example to single-acting and double-acting cylinders. Specifically, when the piezoelectric valve 20 with only one air outlet 202 (202 a, 202 b) is used for the single-acting air cylinder, the air outlet external interfaces 1012a, 1012b in one of the two groups are connected to the interfaces of the single-acting air cylinder, and at this time, the single-acting air cylinder can be driven to work. While for a double-acting cylinder, a piezoelectric valve 20 having two air outlets 202 (202 a, 202 b) may be employed, one of the two sets of air outlet external interfaces 1012a, 1012b may be connected to a first interface of the double-acting cylinder, and the other of the two sets of air outlet external interfaces 1012a, 1012b may be connected to a second interface of the double-acting cylinder, so that the driving of the double-acting cylinder may be achieved.
The number of the exhaust external ports 1015a and 1015b, the exhaust passages H13a and H13b, the exhaust internal ports 1016a and 1016b, and the number of the exhaust up-conversion ports, the exhaust transfer passages, and the exhaust down-conversion ports on the air-powered adaptor plate may be arranged according to the number of the exhaust ports 203a and 203b of the piezoelectric valve 20, and when the piezoelectric valve 20 has two exhaust ports 203a and 203b, the number of the exhaust external ports 1015a and 1015b, the exhaust passages H13a and H13b, the exhaust internal ports 1016a and 1016b, and the number of the exhaust upper transfer ports 302a and 302b, the exhaust transfer passages H32a and H32b, and the exhaust down-conversion ports 305a and 305b on the air-powered adaptor plate may be arranged in two groups.
Referring to fig. 6, in one embodiment of the present invention, the intake air up-converting port and the intake air down-converting port are offset and partially overlapped, and the intake air transfer channel H31 is formed in the intake air up-converting port and the intake air down-converting port and penetrates through the intake air up-converting port and the intake air down-converting port from top to bottom.
That is, the air inlet up-conversion interface and the air inlet down-conversion interface are partially overlapped in a staggered state, and under the structure, the air inlet through-conversion channel H31 penetrating from top to bottom can be directly arranged at the overlapped part, so that the air inlet through-conversion channel H31 is convenient to process, and the air inlet up-conversion interface and the air inlet down-conversion interface are ensured to be communicated.
Referring to fig. 4, in one embodiment of the present invention, the gas outlet up-conversion port and the gas outlet down-conversion port are offset and partially overlapped, and the gas outlet transfer channels H32a and H32b are formed in the gas outlet up-conversion port and the gas outlet down-conversion port and partially overlap, and penetrate through the gas outlet up-conversion port and the gas outlet down-conversion port from top to bottom.
That is, the gas outlet up-converting port and the gas outlet down-converting port are partially overlapped in a staggered state, and in this structure, gas outlet converting channels H32a and H32b penetrating from top to bottom can be directly provided in the overlapped portion, so that the processing of the gas outlet converting channels H32a and H32b is facilitated, and the gas outlet up-converting ports 302a and 302b and the gas outlet down-converting ports 305a and 305b are ensured to be capable of communicating.
Referring to fig. 5, in another embodiment of the present invention, the air outlet up-conversion port and the air outlet down-conversion port are staggered and do not overlap, the air outlet transfer channels H32a, H32b extend from the first side surface S31 of the air channel adapter plate 30 to the second side surface S32 of the air channel adapter plate 30 so as to communicate the air outlet up-conversion port and the air outlet down-conversion port, one end of the air outlet transfer channels H32a, H32b located on the first side surface S31 of the air channel adapter plate 30 is plugged and sealed by the first plug 31, and the first side surface S31 is opposite to the second side surface S32.
That is, the gas outlet up-converting port and the gas outlet down-converting port are completely dislocated without overlapping portions, and in this structure, the first side surface S31 of the gas path adapter plate 30 may be drilled on the second side surface S32 of the gas path adapter plate 30 to form gas outlet converting channels H32a, H32b, and the gas outlet converting channels H32a, H32b have junctions with the gas outlet up-converting ports 302a, 302b and the gas outlet down-converting ports 305a, 305b in the extending direction, thereby penetrating the gas outlet up-converting port and the gas outlet down-converting port. And the upper end of the first side surface S31 is sealed by the first plug 31, so that the processing is convenient, and the communication between the air outlet upper switching ports 302a and 302b and the air outlet lower switching ports 305a and 305b is ensured.
Referring to fig. 5, in one embodiment of the present invention, the exhaust gas up-converting port and the exhaust gas down-converting port are offset and not overlapped, the exhaust gas transfer passages H33a and H33b extend from the third side surface S33 of the gas circuit adapter plate 30 to the fourth side surface S34 of the gas circuit adapter plate 30 so as to penetrate the exhaust gas up-converting port and the exhaust gas down-converting port, one end of the exhaust gas transfer passages H33a and H33b located at the third side surface S33 of the gas circuit adapter plate 30 is blocked and sealed by the second plugs 32a and 32b, and the third side surface S33 is opposite to the fourth side surface S34.
That is, the exhaust gas upper transfer ports 303a, 303b and the exhaust gas lower transfer ports 306a, 306b are completely offset without overlapping portions, and in this structure, the third side surface S33 of the air path transfer plate 30 may be bored on the fourth side surface S34 of the air path transfer plate 30 to form the exhaust gas transfer passages H33a, H33b, which have junctions with the exhaust gas upper transfer ports 303a, 303b and the exhaust gas lower transfer ports 306a, 306b in the extending direction, thereby penetrating the exhaust gas upper transfer ports and the exhaust gas lower transfer ports. The upper end of the third side surface S33 is sealed by the second plugs 32a and 32b, which is convenient to process and ensures that the exhaust upper ports 303a and 303b and the exhaust lower ports 306a and 306b can communicate.
Referring to fig. 4 to 6, in some embodiments of the present invention, a first sealing ring is disposed between the base plate 101 and the gas circuit adapter plate 30, so that the inlet inner interface 1013 is connected with the inlet lower adapter 304 in a sealing manner, the outlet inner interfaces 1014a, 1014b are connected with the outlet lower adapter 305a, 305b in a sealing manner, and the outlet inner interfaces 1016a, 1016b are connected with the outlet lower adapter 306a, 306b in a sealing manner. A second sealing ring is arranged between the gas circuit adapter plate 30 and the piezoelectric valve 20, so that the gas inlet upper adapter opening 301 is in sealing connection with the gas inlet 201, the gas outlet upper adapter openings 302a and 302b are in sealing connection with the gas outlets 202 (202 a and 202 b), and the gas outlet adapter opening is in sealing connection with the gas outlets 203a and 203 b.
In this way, the first seal ring can ensure the seal between the in-inlet interface 1013 and the in-inlet lower transfer port 304, the seal between the out-outlet inner interfaces 1014a, 1014b and the out-outlet lower transfer ports 305a, 305b, and the seal between the in-exhaust interfaces 1016a, 1016b and the out-exhaust lower transfer ports 306a, 306b are more reliable. The second seal ring can ensure more reliable sealing between the upper inlet port 301 and the inlet port 201, and between the upper outlet ports 302a, 302b and the outlet ports 202 (202 a, 202 b), and between the lower outlet port and the outlet ports 203a, 203 b.
In some embodiments of the present invention, isolation filters (not shown) are provided within the inlet inner bore 1013, the outlet inner bores 1014a, 1014b, and the exhaust ports 203a, 203b to isolate the spark and filter particulates and moisture from the gas. The isolating filter can be a stainless steel powder metallurgy filter, a bronze powder metallurgy filter, a stainless steel sintering filter, a bronze sintering filter and the like.
On the other hand, the electric control part in the valve positioner may generate electric sparks during operation, and by providing isolation filters in the inlet internal interface 1013, the outlet internal interfaces 1014a, 1014b and the exhaust ports 203a, 203b, electric sparks can be prevented from entering the inlet internal interface 1013, the outlet internal interfaces 1014a, 1014b and the exhaust ports 203a, 203b, thereby improving the safety and reliability of the use of the valve positioner. On the other hand, when the gas is introduced into and discharged from the gas inlet/outlet inner port 1013, the gas outlet inner ports 1014a and 1014b, and the gas outlet ports 203a and 203b, particulate matter, moisture, and the like in the gas can be filtered out by the separation filter.
The valve positioner provided by the embodiment of the invention is provided with the valve positioner gas circuit switching device.
It should be noted that other structures and operations of the valve positioner according to the embodiments of the present invention are known to those skilled in the art, and will not be described in detail herein.
According to the valve positioner provided by the embodiment of the invention, with the valve positioner air passage switching device, the communication between the piezoelectric valve 20 and the positioner shell 10 can be realized through the air passage switching plate 30, the connection is convenient, and the problem that the connection cannot be realized due to the fact that the positions of the air inlet 201, the air outlet 202 (202 a and 202 b) and the air outlet 203a and 203b on the piezoelectric valve 20 are not corresponding to the positions of the air inlet on the positioner is solved. In addition, when configuring different piezoelectric valves 20, can through changing different gas circuit conversion boards, in order to realize that different voltage valves can adapt to same locator, improve the commonality of piezoelectric valve 20.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A valve positioner air circuit switching device, characterized by comprising:
The locator comprises a locator shell, wherein the locator shell at least comprises a substrate part, and an air inlet external interface and an air outlet external interface are arranged on the first side surface of the substrate part; an air inlet inner interface and an air outlet inner interface are arranged on the top surface of the substrate part; an air inlet channel which is communicated with the air inlet outer interface and the air inlet inner interface and an air outlet channel which is communicated with the air outlet outer interface and the air outlet inner interface are formed in the substrate part;
a piezoelectric valve located above the base plate portion and having an air inlet and an air outlet;
the gas circuit adapter plate is arranged between the substrate part and the piezoelectric valve, the top surface of the gas circuit adapter plate is provided with a gas inlet upper switching port and a gas outlet upper switching port, the gas inlet upper switching port is opposite to a gas inlet on the piezoelectric valve, and the gas outlet upper switching port is opposite to a gas outlet on the piezoelectric valve;
The bottom surface of the gas circuit adapter plate is provided with a gas inlet down-conversion interface and a gas outlet down-conversion interface, the gas inlet down-conversion interface is staggered with the gas inlet up-conversion interface and is opposite to the gas inlet inner interface, and the gas outlet down-conversion interface is staggered with the gas outlet up-conversion interface and is opposite to the gas outlet inner interface;
An air inlet switching channel which is communicated with the air inlet up-conversion interface and the air inlet down-conversion interface and an air outlet switching channel which is communicated with the air outlet up-conversion interface and the air outlet down-conversion interface are formed in the air circuit switching board;
The piezoelectric valve further comprises an exhaust port; an exhaust outer interface is arranged on the second side surface of the substrate part, an exhaust inner interface is arranged on the top surface of the substrate part, and an exhaust channel which is communicated with the exhaust outer interface and the exhaust inner interface is formed in the substrate part; an exhaust upper transfer port is arranged on the top surface of the gas circuit adapter plate, and the exhaust upper transfer port is opposite to an exhaust port on the piezoelectric valve; an exhaust down-conversion interface is arranged on the bottom surface of the gas circuit adapter plate, and is staggered with the exhaust up-conversion interface and is opposite to the exhaust internal interface; an exhaust switching channel which is communicated with the exhaust up-conversion interface and the exhaust down-conversion interface is formed in the gas circuit switching plate;
The air inlet up-conversion interface and the air inlet down-conversion interface are staggered and partially overlapped, and the air inlet transfer channel is formed in the air inlet up-conversion interface and partially overlapped with the air inlet down-conversion interface and penetrates through the air inlet up-conversion interface and the air inlet down-conversion interface from top to bottom.
2. The valve positioner air circuit switching device of claim 1, wherein isolation filters are provided in the inlet inner interface, the outlet inner interface, and the outlet outer interface to isolate electrical sparks and to filter particulate matter and moisture in the gas.
3. The valve positioner gas circuit switching device of claim 1, wherein the gas outlet up-conversion port and the gas outlet down-conversion port are staggered and partially overlapped, and the gas outlet switching channel is formed in the gas outlet up-conversion port and the gas outlet down-conversion port partially overlapped and penetrates through the gas outlet up-conversion port and the gas outlet down-conversion port from top to bottom.
4. The valve positioner air circuit switching device of claim 1, wherein the air outlet up-conversion interface and the air outlet down-conversion interface are staggered and do not overlap, the air outlet switching channel extends from a first side surface of the air circuit switching plate to a second side surface of the air circuit switching plate so as to communicate the air outlet up-conversion interface with the air outlet down-conversion interface, and one end of the air outlet switching channel, which is positioned on the first side surface of the air circuit switching plate, is blocked and sealed by a first plug, and the first side surface is opposite to the second side surface.
5. The valve positioner air circuit switching device of claim 1, wherein the exhaust upper switching port and the exhaust lower switching port are staggered and do not overlap, the exhaust switching channel extends from the third side surface of the air circuit switching plate to the fourth side surface of the air circuit switching plate so as to communicate the exhaust upper switching port and the exhaust lower switching port, and one end of the exhaust switching channel, which is positioned on the third side surface of the air circuit switching plate, is blocked and sealed by a second plug, and the third side surface is opposite to the fourth side surface.
6. The valve positioner air passage switching device according to claim 1, wherein a first sealing ring is provided between the base plate portion and the air passage switching plate, so that the air inlet inner interface is in sealing connection with the air inlet lower switching port, the air outlet inner interface is in sealing connection with the air outlet lower switching port, and the air outlet inner interface is in sealing connection with the air outlet lower switching port;
And a second sealing ring is arranged between the gas circuit adapter plate and the piezoelectric valve, so that the gas inlet upper switching port is in sealing connection with the gas inlet, the gas outlet upper switching port is in sealing connection with the gas outlet, and the gas outlet lower switching port is in sealing connection with the gas outlet.
7. The valve positioner air circuit switching device of claim 1, wherein the number of air outlets is one or two and the number of air outlets is two.
8. A valve positioner having a valve positioner gas circuit switching device as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910950840.7A CN110594474B (en) | 2019-10-08 | 2019-10-08 | Valve positioner gas circuit switching device and valve positioner with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910950840.7A CN110594474B (en) | 2019-10-08 | 2019-10-08 | Valve positioner gas circuit switching device and valve positioner with same |
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| CN110594474B true CN110594474B (en) | 2024-05-07 |
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| CN108612897A (en) * | 2018-07-13 | 2018-10-02 | 深圳市摩控自动化设备有限公司 | Electropneumatic valve positioner |
| CN108612898A (en) * | 2018-07-13 | 2018-10-02 | 深圳市摩控自动化设备有限公司 | Electropneumatic valve positioner gas circuit conversion equipment and electropneumatic valve positioner |
| CN109219705A (en) * | 2016-04-14 | 2019-01-15 | 贺尔碧格自动化技术控股股份有限公司 | Electropneumatic valve group |
| CN210739505U (en) * | 2019-10-08 | 2020-06-12 | 深圳市摩控自动化设备有限公司 | Valve positioner gas circuit switching device and have its valve positioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5096898B2 (en) * | 2007-12-12 | 2012-12-12 | ティアック株式会社 | Mechanical valve |
| WO2012177645A2 (en) * | 2011-06-20 | 2012-12-27 | Graco Minnesota Inc. | Pour spout adapter assembly for pumping system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109219705A (en) * | 2016-04-14 | 2019-01-15 | 贺尔碧格自动化技术控股股份有限公司 | Electropneumatic valve group |
| CN108612897A (en) * | 2018-07-13 | 2018-10-02 | 深圳市摩控自动化设备有限公司 | Electropneumatic valve positioner |
| CN108612898A (en) * | 2018-07-13 | 2018-10-02 | 深圳市摩控自动化设备有限公司 | Electropneumatic valve positioner gas circuit conversion equipment and electropneumatic valve positioner |
| CN210739505U (en) * | 2019-10-08 | 2020-06-12 | 深圳市摩控自动化设备有限公司 | Valve positioner gas circuit switching device and have its valve positioner |
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