Pneumatic valve feedback signal measuring device

Abstract

The utility model relates to a pneumatic valve feedback signal measuring device, and relates to the technical field of testing. The device comprises a feedback measurement circuit and a control box, the control box is provided with a control box body, and the feedback measurement circuit is located in the control box body. The feedback measurement circuit comprises an on-off input isolation type safety barrier and a power supply conversion module, and the power supply conversion module is electrically connected with the on-off input isolation type safety barrier. Through the control box with parameter display and signal line access functions, when the feedback measurement circuit generates the corresponding control signal, the specific parameters of the feedback signal are displayed through the control box, so that whether the valve position feedback signal is accurate or not can be intuitively judged.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a pneumatic valve feedback signal measuring device. Background Art

[0002] With the vigorous development of automated control systems, proximity switches, valve position transmitters, etc. are also being used more and more widely in the chemical industry and instrumentation industry. The opening and closing of control valves and their switching status during the production process will be directly monitored by the automatic control system, which will also affect product quality and production safety.

[0003] However, there are two problems in the valve production and debugging process: first, how to ensure the installation position of the position switch on the valve to ensure that the proximity switch will transmit the detected signal to the control system, so as to determine the switch state of the valve; second, how to ensure that the 4-20mA feedback signal of the valve position transmitter corresponds to the actual opening of the valve, so as to determine the opening position of the valve. Summary of the invention

[0004] The utility model relates to a pneumatic valve feedback signal measuring device, which can intuitively reflect the signal feedback in the feedback signal measurement process through the feedback measurement circuit in the control box body. The device includes a feedback measurement circuit and a control box;

[0005] The control box has a control box body, and the feedback measurement circuit is located inside the control box body;

[0006] The feedback measurement circuit includes a switch input isolation type safety barrier and a power conversion module, and the power conversion module is electrically connected to the switch input isolation type safety barrier.

[0007] In a possible implementation, the control box further includes a milliampere ammeter;

[0008] The display part of the milliampere meter is located on the outer surface of the control box body;

[0009] The milliampere ammeter is used to connect with the feedback measurement circuit to obtain the feedback signal and display the feedback signal in the form of current indication.

[0010] In a possible implementation, the control box further includes at least two knob switches and at least two groups of banana jack groups, each group of banana jack groups includes at least two banana jacks;

[0011] The rotary switch and banana jack are located on the outer surface of the control box;

[0012] The rotary switch is connected to the feedback measurement circuit switch;

[0013] The banana jack is connected to the feedback measurement circuit;

[0014] One rotary switch corresponds to one set of banana jacks.

[0015] In a possible implementation manner, the at least two knob switches include a first knob switch, a second knob switch, a third knob switch, a fourth knob switch, and a fifth knob switch;

[0016] The first knob switch is used to control the power on and off;

[0017] The second knob switch is used to control the first 24V output sub-circuit in the feedback measurement circuit;

[0018] The third knob switch is used to control the second 24V output sub-circuit in the feedback measurement circuit;

[0019] The fourth rotary switch is used to control the open feedback signal subcircuit in the feedback measurement circuit;

[0020] The fifth rotary switch is used to control the closed position feedback signal subcircuit in the feedback measurement circuit.

[0021] In a possible implementation, the control box further includes at least two indicator lights;

[0022] At least two indicator lights are located on the outer surface of the control box body.

[0023] At least two indicator lights are connected to the feedback measurement circuit.

[0024] In a possible implementation manner, the at least two indicator lights include a first indicator light, a second indicator light, a third indicator light, and a fourth indicator light;

[0025] The first indicator light is used to indicate the on / off status of the first 24V output sub-circuit in the feedback measurement circuit;

[0026] The second indicator light is used to indicate the on / off status of the second 24V output sub-circuit in the feedback measurement circuit;

[0027] The third indicator light is used to indicate the on / off status of the open feedback signal subcircuit in the feedback measurement circuit;

[0028] The fourth indicator light is used to indicate the on / off status of the off-position feedback signal subcircuit in the feedback measurement circuit.

[0029] The beneficial effects brought by the technical solution provided by the utility model include at least:

[0030] Through the control box with parameter display and signal line access functions, when the feedback measurement circuit generates a corresponding control signal, the control box displays the specific parameters of the feedback signal, so that it can be intuitively judged whether the valve position feedback signal is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 The utility model shows a logic schematic diagram of a pneumatic valve feedback signal measuring device.

[0033] Figure 2 The figure shows a schematic diagram of the external structure of a control box provided by the utility model.

[0034] Figure 3 The utility model shows a circuit schematic diagram of a feedback measurement circuit provided by the utility model.

[0035] The reference numerals in the accompanying drawings are as follows:

[0036] 11-control box, 12-milliampere ammeter, 13-knob switch, 14-banana jack, 15-indicator light;

[0037] 21- switch quantity input isolation safety barrier, 22- power conversion module;

[0038] 131 - first knob switch, 132 - second knob switch, 133 - third knob switch, 134 - fourth knob switch, 135 - fifth knob switch;

[0039] 151 - first indicator light, 152 - second indicator light, 153 - third indicator light, 154 - fourth indicator light. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Figure 1 A schematic diagram of a frame of a pneumatic valve feedback signal measuring device provided by the utility model is shown. Figure 2 The figure shows a schematic diagram of the external structure of a control box provided by the utility model. Figure 3 The circuit diagram of a feedback measurement circuit provided by the utility model is shown in FIG. Figures 1 to 3 For reference, the device includes a feedback measurement circuit and a control box; the control box has a control box body 11, and the feedback measurement circuit is located inside the control box body 11; the feedback measurement circuit includes a switch input isolation safety barrier and a power conversion module, and the power conversion module is electrically connected to the switch input isolation safety barrier.

[0042] In the embodiment of the present application, the switch input isolation safety barrier is used to ensure the safety of the power conversion module. The present application does not limit the specific circuit structure of the power conversion module and the specific circuit structure of the switch input isolation safety barrier. In an optional embodiment, the circuit diagram of the feedback measurement circuit is as follows: Figure 3 shown.

[0043] In a possible implementation, the control box further includes a milliampere ammeter 12; the display portion of the milliampere ammeter 12 is located on the outer surface of the control box body 11; the milliampere ammeter 12 is used to connect to the feedback measurement circuit to obtain the feedback signal and display the feedback signal in the form of current indication. Optionally, the range of the milliampere ammeter 12 is 0-25mA, so as to display the 4-20mA feedback signal in the actual working process.

[0044] In a possible implementation, the control box further includes at least two rotary switches 13 and at least two groups of banana jacks 14, each group of banana jacks 14 includes at least two banana jacks 14; the rotary switches 13 and banana jacks 14 are located on the outer surface of the control box body 11; the rotary switches 13 are connected to the switch of the feedback measurement circuit; the banana jacks 14 are connected to the feedback measurement circuit; one rotary switch 13 corresponds to one group of banana jacks 14. Optionally, on the surface of the control box, the corresponding rotary switches 13 and banana jacks 14 are located in the same row.

[0045] In a specific real-time method, at least two knob switches 13 include a first knob switch 131, a second knob switch 132, a third knob switch 133, a fourth knob switch 134 and a fifth knob switch 135; the first knob switch 131 is used to control the on and off of the power supply; the second knob switch 132 is used to control the first 24V output sub-circuit in the feedback measurement circuit; the third knob switch 133 is used to control the second 24V output sub-circuit in the feedback measurement circuit; the fourth knob switch 134 is used to control the open feedback signal sub-circuit in the feedback measurement circuit; the fifth knob switch 135 is used to control the closed feedback signal sub-circuit in the feedback measurement circuit.

[0046] In a possible implementation, the control box further includes at least two indicator lights 15 ; the at least two indicator lights 15 are located on the outer surface of the control box body 11 , and the at least two indicator lights 15 are connected to the feedback measurement circuit.

[0047] In a specific embodiment, at least two indicator lights 15 include a first indicator light 151, a second indicator light 152, a third indicator light 153 and a fourth indicator light 154; the first indicator light 151 is used to indicate the on-off status of the first 24V output sub-circuit in the feedback measurement circuit; the second indicator light 152 is used to indicate the on-off status of the second 24V output sub-circuit in the feedback measurement circuit; the third indicator light 153 is used to indicate the on-off status of the open-position feedback signal sub-circuit in the feedback measurement circuit; and the fourth indicator light 154 is used to indicate the on-off status of the closed-position feedback signal sub-circuit in the feedback measurement circuit.

[0048] To summarize, the device provided in the embodiment of the present application uses a control box with parameter display and signal line access functions. When the feedback measurement circuit generates a corresponding control signal, the control box displays the specific parameters of the feedback signal, so as to intuitively determine whether the valve position feedback signal is accurate.

[0049] That is, the device provided in the embodiment of the present application realizes the opening and closing of the valve by controlling the on and off power supply of the solenoid valve, judges whether the installation position of the position switch is reasonable by the on and off of the position switch feedback signal, thereby causing the signal light to flicker, and intuitively judges whether the valve position feedback signal is accurate by the value of the milliampere ammeter; the structure is simple and easy to carry; it has strong versatility and is suitable for debugging different types of solenoid valves and position switches.

[0050] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic valve feedback signal measuring device, characterized in that: The pneumatic valve feedback signal measuring device comprises a feedback measurement circuit and a control box; The control box comprises a control box body (11), and the feedback measurement circuit is located inside the control box body (11); The control box body (11) has parameter display and signal line access functions; The feedback measurement circuit comprises a switch quantity input isolation type safety barrier (21) and a power conversion module (22), wherein the power conversion module (22) is electrically connected to the switch quantity input isolation type safety barrier (21).

2. The pneumatic valve feedback signal measuring device according to claim 1, characterized in that: The control box also includes a milliampere ammeter (12); The display portion of the milliampere ammeter (12) is located on the outer surface of the control box body (11); The milliampere ammeter (12) is used to be connected to the feedback measurement circuit to obtain a feedback signal and to display the feedback signal in the form of a current indication.

3. The pneumatic valve feedback signal measuring device according to claim 1, characterized in that: The control box further comprises at least two rotary switches (13) and at least two groups of banana jacks, each group of banana jacks comprising at least two banana jacks (14); The knob switch (13) and the banana jack (14) are located on the outer surface of the control box body; The rotary switch (13) is connected to the switch of the feedback measurement circuit; The banana jack (14) is connected to the feedback measurement circuit; A rotary switch (13) corresponds to a set of banana jacks.

4. The pneumatic valve feedback signal measuring device according to claim 3, characterized in that: The at least two rotary knob switches include a first rotary knob switch (131), a second rotary knob switch (132), a third rotary knob switch (133), a fourth rotary knob switch (134), and a fifth rotary knob switch (135); The first rotary switch (131) is used to control the on and off of the main power supply; The second knob switch (132) is used to control the first 24V output subcircuit in the feedback measurement circuit; The third knob switch (133) is used to control the second 24V output subcircuit in the feedback measurement circuit; The fourth rotary switch (134) is used to control the open feedback signal subcircuit in the feedback measurement circuit; The fifth rotary switch (135) is used to control the off-position feedback signal subcircuit in the feedback measurement circuit.

5. The pneumatic valve feedback signal measuring device according to claim 4, characterized in that: The control box also includes at least two indicator lights (15); At least two indicator lights (15) are located on the outer surface of the control box body (11); The at least two indicator lights (15) are connected to the feedback measurement circuit.

6. The pneumatic valve feedback signal measuring device according to claim 5, characterized in that: The at least two indicator lights (15) include a first indicator light (151), a second indicator light (152), a third indicator light (153), and a fourth indicator light (154); The first indicator light (151) is used to indicate the on / off status of the first 24V output subcircuit in the feedback measurement circuit; The second indicator light (152) is used to indicate the on / off status of the second 24V output subcircuit in the feedback measurement circuit; The third indicator light (153) is used to indicate the on / off status of the open position feedback signal subcircuit in the feedback measurement circuit; The fourth indicator light (154) is used to indicate the on / off status of the off-position feedback signal subcircuit in the feedback measurement circuit.

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