Electrical conversion device

Abstract

The application provides an electrical conversion device, comprising a body, a gas source cavity, an output cavity, an exhaust cavity, a jet cavity and an input mechanism are sequentially arranged in the same direction in the body; the body is provided with an air inlet corresponding to the gas source cavity, an output port corresponding to the output cavity, an exhaust port corresponding to the exhaust cavity and a back pressure channel; a fixed seat for separating the cavities is arranged between the gas source cavity and the output cavity, an air inlet channel is formed in the fixed seat, a movable rod is arranged through the air inlet channel, a blocking part is arranged on the movable rod, and an elastic part is arranged on the movable rod; a first pneumatic part is arranged between the output cavity and the exhaust cavity, an exhaust part is installed on the first pneumatic part, an exhaust channel is formed in the exhaust part, one end of the movable rod in the exhaust cavity extends into the exhaust channel and can block the exhaust channel; a second pneumatic part is arranged between the exhaust cavity and the jet cavity, and one end of the exhaust part away from the first pneumatic part abuts against the second pneumatic part; and a jet nozzle is arranged between the jet cavity and the input mechanism.

Description

Technical Field

[0001] This invention belongs to the field of signal conversion, and in particular relates to an electrical conversion device. Background Technology

[0002] Intelligent valve positioners are important control accessories for regulating valve devices, typically used in conjunction with diaphragm pneumatic actuators. They control the valve's movement by regulating the pressure within the actuator's chamber. The intelligent valve positioner receives the input voltage signal from the controller, converts it into a pressure signal via an internal electro-pneumatic converter, and then amplifies the pressure signal through a signal amplification mechanism. This amplified pressure signal outputs a signal with higher flow rate and pressure to control the pneumatic actuator, thereby controlling the regulating valve's movement.

[0003] In existing intelligent valve positioners, the electrical conversion mechanism uses electromagnetic principles to convert electrical signals into pneumatic signals. An electromagnetic coil generates an electromagnetic force that attracts a thin metal sheet, causing it to deform and altering the jet gap. This changes the exhaust resistance in the exhaust channel, resulting in a change in output air pressure. However, under severe vibration, the metal sheet can vibrate unstablely, affecting the stability and accuracy of the back pressure signal. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the object of the present invention is to provide an electrical conversion device to solve the above problems.

[0005] To achieve the above and other related objectives, the present invention provides an electrical conversion device, including a body, wherein an air source chamber, an output chamber, an exhaust chamber, a jet chamber and an input mechanism are arranged sequentially along the same direction within the body; the body is provided with an air inlet for air intake into the air source chamber, an output port for output from the output chamber, an exhaust port for exhaust from the exhaust chamber, and a back pressure channel for communication between the air source chamber and the jet chamber.

[0006] A fixed seat for chamber separation is provided between the air source chamber and the output chamber. An air inlet channel is provided on the fixed seat. A movable rod is provided through the air inlet channel. A blocking part for blocking the air inlet channel is provided at one end of the movable rod located in the air source chamber. An elastic component for providing elastic force for the movable rod to move towards the output chamber is provided between the inner wall of the air source chamber and the movable rod.

[0007] A first pneumatic component for chamber separation is provided between the output chamber and the exhaust chamber. An exhaust component is installed on the first pneumatic component. An exhaust channel for communication between the output chamber and the exhaust chamber is opened on the exhaust component. One end of the movable rod located in the exhaust chamber extends into the exhaust channel and can block the exhaust channel.

[0008] A second pneumatic component is provided between the exhaust chamber and the jet chamber, and the end of the exhaust component away from the first pneumatic component abuts against the second pneumatic component; a jet nozzle is provided between the jet chamber and the input mechanism.

[0009] Optionally, a first limiting part is provided on the inner wall of the air source cavity to limit the installation position of the fixed seat, and the openings of the air inlet and the back pressure channel are opened between the first limiting part and the elastic component.

[0010] Optionally, the fixed base is provided with a second limiting part, which is used to limit the distance between the fixed base and the first limiting part. The second limiting part is provided with a connecting hole, which is connected to the output port.

[0011] Optionally, the body is provided with a throttling device for adjusting the size of the cross-section connecting the back pressure channel and the jet chamber.

[0012] Optionally, the exhaust component includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are vertically fixed, the second connecting part is located in the exhaust chamber and abuts against the second pneumatic component, and the first connecting part passes through the first pneumatic component and is used to abut against the movable rod.

[0013] Optionally, the exhaust passage is opened along the axial direction of the first connecting portion, and the portion of the first connecting portion located inside the exhaust chamber has an exhaust outlet, which is evenly distributed around the first connecting portion.

[0014] Optionally, the input mechanism includes a linear motor, the output end of which is connected to a movable block. Driven by the linear motor, the movable block moves closer to or further away from the jet nozzle, thereby changing the jet gap between the jet nozzle and the movable block.

[0015] Optionally, a sealing ring is provided between the fixing seat and the inner wall of the machine body.

[0016] Optionally, the first pneumatic component is a first diaphragm, and the exhaust component is mounted on the first diaphragm; the second pneumatic component is a second diaphragm.

[0017] Optionally, the elastic component is a spring.

[0018] As described above, the electrical conversion device of the present invention has the following beneficial effects:

[0019] In this design, air enters through the inlet. After entering the air source chamber, the movable rod, under the combined action of the elastic component and air pressure, abuts against the fixed seat, closing the air intake passage. Part of the gas in the air source chamber enters the jet chamber through the back pressure passage, and part of the gas in the jet chamber is ejected through the jet nozzle. Under the obstruction of the input mechanism, exhaust resistance is formed, thereby creating back pressure P1 in the jet chamber.

[0020] The back pressure P1 in the jet chamber acts on the second pneumatic component, forming a thrust F1, which pushes the exhaust component to move towards the air source chamber. At this time, the exhaust component drives the movable rod to move into the air source chamber, the exhaust passage is closed, and the intake passage is opened.

[0021] Gas in the gas source chamber enters the output chamber through the inlet channel, generating a pressure signal P2. This pressure signal P2 acts on the first pneumatic component, creating a thrust F2. As the gas in the output chamber increases, the pressure signal P2 increases, causing the thrust F2 to increase as well. When the thrust F2 = F1, the exhaust component and the movable rod return to their initial positions, thus closing the inlet and exhaust channels. At this point, the pressure signal P2 in the output chamber is output from the output port, forming an output pressure signal. At this time, P2 = mP1, where m is a proportionality coefficient.

[0022] When the back pressure P1 in the jet chamber decreases and the thrust F2 is greater than the thrust F1, the exhaust component moves towards the jet chamber, thus opening the exhaust passage. At this time, the gas in the output chamber is discharged into the exhaust chamber through the exhaust passage and exits through the exhaust port, causing the pressure P2 in the output chamber to decrease. When the pressure P2 decreases to the point that F2 = F1, the exhaust component and the moving rod return to their initial positions, closing the intake and exhaust passages. At this point, the output pressure at the outlet is P2 = mP1.

[0023] The principle of electrical conversion in this application is different from that in the prior art. Furthermore, this application does not include electromagnetic coils, metal sheets, etc., which avoids the instability caused by the vibration of metal sheets and effectively improves the stability of the signal. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the electrical conversion device in an embodiment of the present invention.

[0025] Figure 2 for Figure 1 Enlarged view of section AA in the middle.

[0026] Figure 3 This is a schematic diagram illustrating the cooperation between the movable rod and the exhaust component in an embodiment of the present invention. Detailed Implementation

[0027] The reference numerals in the accompanying drawings include: base 1, exhaust seat 2, jet seat 3, jet nozzle 301, linear motor 4, movable block 401, air inlet 5, output port 6, exhaust port 7, air source chamber 8, output chamber 9, exhaust chamber 10, jet chamber 11, jet gap 12, fixed seat 13, air inlet channel 1301, second limiting part 1302, connecting hole 1303, first limiting part 1304, first diaphragm 14, second diaphragm 15, spring 16, movable rod 17, blocking part 1701, exhaust component 18, exhaust channel 1801, first connecting part 1802, second connecting part 1803, air outlet 1804, throttling component 19, and back pressure channel 20.

[0028] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0029] The electrical conversion device in this application, refer to the appendix. Figure 1 To be continued Figure 3 As shown.

[0030] In an exemplary embodiment of this application, an electrical conversion device is provided, including a body, in which an air source chamber 8, an output chamber 9, an exhaust chamber 10, a jet chamber 11 and an input mechanism are arranged sequentially along the same direction; the body is provided with an air inlet 5 for air intake of the air source chamber 8, an output port 6 for output of the output chamber 9, an exhaust port 7 for exhaust of the exhaust chamber 10, and a back pressure channel 20 for communication between the air source chamber 8 and the jet chamber 11;

[0031] A fixed seat 13 for chamber separation is provided between the air source chamber 8 and the output chamber 9. An air inlet channel 1301 is provided on the fixed seat 13. A movable rod 17 is provided through the air inlet channel 1301. A blocking part 1701 for blocking the air inlet channel 1301 is provided at one end of the movable rod 17 located in the air source chamber 8. An elastic component for providing elastic force for the movable rod 17 to move toward the output chamber 9 is provided between the inner wall of the air source chamber 8 and the movable rod 17.

[0032] A first pneumatic component for chamber separation is provided between the output chamber 9 and the exhaust chamber 10. An exhaust component 18 is installed on the first pneumatic component. An exhaust channel 1801 for communicating between the output chamber 9 and the exhaust chamber 10 is opened on the exhaust component 18. One end of the movable rod 17 located in the exhaust chamber 10 extends into the exhaust channel 1801 and can block the exhaust channel 1801.

[0033] A second pneumatic component is provided between the exhaust chamber 10 and the jet chamber 11, and the end of the exhaust component 18 away from the first pneumatic component abuts against the second pneumatic component; a jet nozzle 301 fixing seat is provided between the jet chamber 11 and the input mechanism.

[0034] In this embodiment, air enters through the air inlet 5. After the gas enters the air source chamber 8, the movable rod 17 abuts against the fixed seat 13 under the combined action of the elastic component and air pressure, thus closing the air intake channel 1301. Part of the gas in the air source chamber 8 enters the jet chamber 11 through the back pressure channel 20. Part of the gas in the jet chamber 11 is ejected through the jet nozzle 301, forming exhaust resistance under the obstruction of the input mechanism, thereby forming a back pressure P1 in the jet chamber 11.

[0035] The back pressure P1 in the jet chamber 11 acts on the second pneumatic component, forming a thrust F1, which pushes the exhaust component 18 to move towards the air source chamber 8. At this time, the exhaust component 18 drives the movable rod 17 to move into the air source chamber 8, the exhaust passage 1801 is closed, and the intake passage is opened.

[0036] Gas in the gas source chamber 8 enters the output chamber 9 through the intake channel 1301, forming a pressure signal P2. This pressure signal P2 acts on the first pneumatic component, generating thrust F2. As the gas in the output chamber 9 increases, the pressure signal P2 increases, causing the thrust F2 to increase. When the thrust F2 = F1, the exhaust component 18 and the movable rod 17 return to their initial positions, thereby closing the intake channel 1301 and the exhaust channel 1801. At this time, the pressure signal P2 in the output chamber 9 is output from the output port 6, forming an output pressure signal. At this point, P2 = mP1, where m is a proportionality coefficient.

[0037] When the back pressure P1 in the jet chamber 11 decreases and the thrust F2 is greater than the thrust F1, the exhaust component 18 will move towards the jet chamber 11, thereby opening the exhaust passage 1801. At this time, the gas in the output chamber 9 is discharged to the exhaust chamber 10 through the exhaust passage 1801 and discharged from the exhaust port 7, and the pressure P2 in the output chamber 9 will decrease. When the pressure P2 decreases to make F2=F1, the exhaust component 18 and the movable rod 17 return to their initial positions, closing the intake passage 1301 and the exhaust passage 1801. At this time, the output pressure of the output port 6 is P2=mP1.

[0038] In an exemplary embodiment, a first limiting part 1304 for limiting the installation position of the fixing seat 13 is provided on the inner wall of the air source cavity 8, and the openings of the air inlet 5 and the back pressure channel 20 are opened between the first limiting part 1304 and the elastic member.

[0039] In this embodiment, the first limiting part 1304 is provided to prevent the fixing seat 13 from blocking the opening of the air inlet 5 and the exhaust channel 1801 after installation.

[0040] In an exemplary embodiment, a second limiting part 1302 is provided on the fixing base 13. The second limiting part 1302 is used to limit the distance between the fixing base 13 and the first limiting part 1304. A connecting hole 1303 is provided on the second limiting part 1302, and the connecting hole 1303 is connected to the output port 6.

[0041] For example, from the air source chamber 8 to the output chamber 9, the diameter of the air intake channel 1301 gradually increases, forming a funnel shape.

[0042] For example, the second limiting part 1302 is provided so that when the fixed base 13 moves to the predetermined position, the connecting hole 1303 coincides with the output port 6, thereby opening the output port 6.

[0043] In an exemplary embodiment, the body is provided with a throttling element 19 for adjusting the size of the communication cross section between the back pressure channel 20 and the jet chamber 11.

[0044] It should be noted that by setting the throttling element 19, the size of the connecting cross section between the back pressure channel 20 and the jet chamber 11 can be changed. The deeper the throttling element 19 is inserted, the smaller the connecting cross section between the back pressure channel 20 and the jet chamber 11; conversely, the deeper the insertion, the larger the connecting cross section (or connecting gap) between the back pressure channel 20 and the jet chamber 11. By changing the connecting cross section, the characteristics of the back pressure in the jet chamber 11 changing with the jet gap can be changed, making the back pressure change linearly, exponentially, or as a percentage change.

[0045] For example, the connecting section between the back pressure channel 20 and the jet chamber 11 is a horn-shaped opening, one end of the throttling device 19 is threadedly connected to the machine body, and the other end of the throttling device 19 is a sealing end that extends into the horn-shaped opening, with a connecting gap between the sealing end and the inner wall of the horn-shaped opening.

[0046] In an exemplary embodiment, the exhaust component 18 includes a first connecting portion 1802 and a second connecting portion 1803. The first connecting portion 1802 and the second connecting portion 1803 are vertically fixed. The second connecting portion 1803 is located inside the exhaust chamber 10 and abuts against the second pneumatic component. The first connecting portion 1802 passes through the first pneumatic component and is used to abut against the movable rod 17.

[0047] In this embodiment, the second connecting portion 1803 is provided to increase the contact area between the exhaust component 18 and the second pneumatic component, thereby reducing the possibility of damage to the second pneumatic component.

[0048] In an exemplary embodiment, the exhaust passage 1801 is opened along the axial direction of the first connecting portion 1802, and the portion of the first connecting portion 1802 located in the exhaust chamber 10 is provided with an exhaust outlet 1804 of the exhaust passage 1801, and the exhaust outlet 1804 is evenly opened around the first connecting portion 1802.

[0049] In this embodiment, the air outlets 1804 are evenly spaced to achieve uniform exhaust in all directions within the exhaust chamber 10.

[0050] In an exemplary embodiment, the input mechanism includes a linear motor 4, the output end of which is connected to a movable block 401. Driven by the linear motor, the movable block 401 moves closer to or further away from the nozzle 301, thereby changing the air gap 12 between the nozzle 301 and the movable block 401.

[0051] In this embodiment, the electrical conversion device receives a signal, and the linear motor 4 generates a corresponding displacement. When the input signal changes, the linear motor 4 actuates, thereby changing the jet gap 12 between the jet nozzle 301 and the movable block 401. As the jet gap 12 changes, the back pressure P1 in the back pressure chamber changes, and the output pressure P2 in the output chamber 9 also changes.

[0052] In one exemplary embodiment, a sealing ring is provided between the fixing seat 13 and the inner wall of the machine body.

[0053] In this embodiment, a sealing ring is provided to achieve a seal.

[0054] In one exemplary embodiment, the first pneumatic component is a first diaphragm 14, and the exhaust component 18 is mounted on the first diaphragm 14; the first pneumatic component is a second diaphragm 15.

[0055] For example, the body includes a base 1, an exhaust seat 2, an air jet seat 3, and an input seat connected sequentially along the same direction. An air source chamber 8 and an output chamber 9 are disposed within the base 1. A first diaphragm 14 is disposed between the base 1 and the exhaust seat 2, and a second diaphragm 15 is disposed between the exhaust seat 2 and the air jet seat 3. A back pressure channel 20 passes sequentially through the base 1, the first diaphragm 14, the exhaust seat 2, and the second diaphragm 15. The input mechanism is mounted on the input seat.

[0056] For example, the exhaust seat 2 is provided with a third limiting part for cooperating with the second limiting part 1302 to abut against the limiting part.

[0057] In one exemplary embodiment, the elastic member is a spring 16.

[0058] For example, a mounting groove for the spring 16 is provided on the inner wall of the base 1 to facilitate the installation of the spring 16.

[0059] It should also be noted that the pressure signal output by the existing electrical converter cannot directly drive the actuator; the pressure signal needs to be amplified separately before it can drive the actuator. However, in this solution, through the use of throttling devices and other mechanisms, the electrical signal can be directly converted into an amplified pressure signal, directly driving the actuator.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An electrical conversion device, characterized by, The device includes a body, in which an air source chamber, an output chamber, an exhaust chamber, a jet chamber, and an input mechanism are arranged sequentially along the same direction; the body is provided with an air inlet for air intake into the air source chamber, an output port for output from the output chamber, an exhaust port for exhaust from the exhaust chamber, and a back pressure channel for communication between the air source chamber and the jet chamber. A fixed seat for chamber separation is provided between the air source chamber and the output chamber. An air inlet channel is provided on the fixed seat. A movable rod is provided through the air inlet channel. A blocking part for blocking the air inlet channel is provided at one end of the movable rod located in the air source chamber. An elastic component for providing elastic force for the movable rod to move towards the output chamber is provided between the inner wall of the air source chamber and the movable rod. A first pneumatic component for chamber separation is provided between the output chamber and the exhaust chamber. An exhaust component is installed on the first pneumatic component. An exhaust channel for communication between the output chamber and the exhaust chamber is opened on the exhaust component. One end of the movable rod located in the exhaust chamber extends into the exhaust channel and can block the exhaust channel. A second pneumatic component is provided between the exhaust chamber and the jet chamber, and the end of the exhaust component away from the first pneumatic component abuts against the second pneumatic component; a jet nozzle is provided between the jet chamber and the input mechanism.

2. The electrical conversion device of claim 1, wherein, The inner wall of the air source cavity is provided with a first limiting part for restricting the installation position of the fixed seat, and the openings of the air inlet and the back pressure channel are opened between the first limiting part and the elastic component.

3. The electrical conversion device of claim 2, wherein, The fixed base is provided with a second limiting part, which is used to limit the distance between the fixed base and the first limiting part. The second limiting part is provided with a connecting hole, which is connected to the output port.

4. The electrical conversion device according to claim 1, characterized in that, The body is equipped with a throttling device for adjusting the size of the cross-section connecting the back pressure channel and the jet chamber.

5. The electrical conversion device according to claim 1, characterized in that, The exhaust component includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are vertically fixed, the second connecting part is located in the exhaust chamber and abuts against the second pneumatic component, and the first connecting part passes through the first pneumatic component and is used to abut against the movable rod.

6. The electrical conversion device according to claim 5, characterized in that, The exhaust channel is opened along the axial direction of the first connecting part, and the exhaust outlet of the exhaust channel is opened at the part of the first connecting part located in the exhaust chamber. The exhaust outlet is evenly opened around the first connecting part.

7. The electrical conversion device according to claim 1, characterized in that, The input mechanism includes a linear motor, the output end of which is connected to a movable block. Driven by the linear motor, the movable block moves closer to or further away from the jet nozzle, thereby changing the jet gap between the jet nozzle and the movable block.

8. The electrical conversion device according to claim 1, characterized in that, A sealing ring is provided between the fixed base and the inner wall of the machine body.

9. The electrical conversion device according to claim 1, characterized in that, The first pneumatic component is a first diaphragm, and the exhaust component is mounted on the first diaphragm; the second pneumatic component is a second diaphragm.

10. The electrical conversion device according to claim 1, characterized in that, The elastic component is a spring.

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