Valve position simulation teaching device

Abstract

The present application discloses a valve position simulation teaching device, including: a power supply, a limit switch, a first relay, a status indicator light, a voltmeter, a digital display component and a fault alarm. The power supply is used to power the entire valve position simulation teaching device, the limit switch is used to simulate the change of the valve position, and the first relay controls the status indicator light, the voltmeter, the digital display component and the fault alarm according to the change of the valve position. Thus, the various actual states of the limit switch are fed back by the status indicator light, the voltmeter, the digital display component and the fault alarm, and the teaching of the relationship between the valve position change and a variety of display screens is realized simultaneously in a limited space, so that the technician can intuitively view the real effect diagram fed back to the main control screen, thereby deepening the technician's combination of theory and practice, and mastering the relationship between the logical state and the display combination, which helps to improve the technician's skill level.

Description

Technical Field

[0001] The present application relates to the field of valve control technology, and in particular to a valve position simulation teaching device. Background Art

[0002] At present, various valves occupy very important functions and roles in nuclear power or industrial automation process control systems. They control the flow, pressure, temperature and other related processes of various media in the system for safe and automatic operation and production. The status of various valves provides a reference and monitoring function for automatic operation and operators to master the safe operation of the process through the feedback of limit switches.

[0003] During equipment commissioning and production operation, the probability of valve failure is very high, including problems with the process system, problems with the valve itself, and problems with the valve limit switch without feedback or abnormal feedback. Due to the differences in equipment design or supporting process systems and manufacturers, the fault screen display status is different. This brings certain difficulties to operation identification and maintenance judgment, especially for inexperienced maintenance personnel who do not understand the different screen display status of different main control systems, which is not conducive to timely and accurate positioning of fault problems by maintenance personnel. Summary of the invention

[0004] In view of this, the present application provides a valve position simulation teaching device, which integrates various display feedback modes. By observing the current state of the limit switch when the valve is open and closed, normal or abnormal, the various logical relationships between the valve limit switch and the main control display can be known.

[0005] According to one aspect of the present application, a valve position simulation teaching device is provided, comprising:

[0006] power supply;

[0007] Limit switch, connected to the power supply;

[0008] A first relay, the first relay comprising: a first control switch, a first end of the first control switch being connected to a power source; a second control switch, a first end of the second control switch being connected to a power source; a first coil, the first coil being connected to a limit switch and a power source, wherein when the first coil is powered on, the first end of the first control switch is connected to the second end of the first control switch, and the first end of the second control switch is connected to the second end of the second control switch, and when the first coil is powered off, the first end of the first control switch is connected to the third end of the first control switch, and the first end of the second control switch is connected to the third end of the second control switch;

[0009] A status indicator light connected to the power supply and the second end of the first control switch;

[0010] a voltmeter connected to the power supply and the third terminal of the first control switch;

[0011] A digital display component, wherein a first end of the digital display component is connected to a power source, a second end of the digital display component is connected to a second end of a second control switch, and a third end of the digital display component is connected to a third end of the second control switch;

[0012] The fault alarm is connected to the power supply and the second end of the first control switch.

[0013] Optionally, the status indicator light includes: a valve switch indicator light and / or a valve reset indicator light.

[0014] Optionally, the digital display assembly includes:

[0015] A current limiting resistor connected to a power supply;

[0016] A digital tube, wherein a first end of the digital tube is connected to a current limiting resistor, a second end of the digital tube is connected to a second end of a second control switch, and a second end of the digital tube is connected to a third end of the second control switch.

[0017] Optionally, the limit switch includes an open limit switch and a closed limit switch;

[0018] The first relay includes: an open position relay connected to the open position limit switch; a closed position relay connected to the closed position limit switch;

[0019] The valve switch indicator light includes: an open position indicator light connected to the power supply and the second end of the first control switch of the open position relay; a closed position indicator light connected to the power supply and the second end of the first control switch of the closed position relay;

[0020] The voltmeter includes: a first voltmeter connected to the power supply and the third end of the first control switch of the open position relay; a second voltmeter connected to the power supply and the third end of the first control switch of the closed position relay;

[0021] The digital display component includes: an on digital display component; the second end of the on digital display component is connected to the second end of the second control switch of the on relay, and the third end of the on digital display component is connected to the third end of the second control switch of the on relay; and an off digital display component, the second end of the off digital display component is connected to the second end of the second control switch of the off relay, and the third end of the off digital display component is connected to the third end of the second control switch of the off relay.

[0022] Optionally, the valve reset indicator light includes:

[0023] Transparent cover;

[0024] A first light emitting element is located in the light-transmitting cover, and the first light emitting element is connected to a power source and a second end of a first control switch of an open position relay;

[0025] The second light emitting element is located in the light-transmitting cover, and the second light emitting element is connected to the power supply and the second end of the first control switch of the off-position relay.

[0026] Optionally, the fault alarm includes:

[0027] A second relay, the second relay comprising: a third control switch, a first end of the third control switch is connected to a second end of the first control switch of the open relay; a fourth control switch, a first end of the fourth control switch is connected to a second end of the first control switch of the open relay; a second coil, the second coil is connected to a second end of the first control switch of the closed relay and a power supply;

[0028] A third relay, the third relay comprising: a fifth control switch, a first end of the fifth control switch connected to a second end of the first control switch of the off-position relay; a sixth control switch, a first end of the sixth control switch connected to a second end of the fourth control switch; and a third coil, the third coil being connected to a second end of the third control switch and a power source;

[0029] an alarm component connected to the second end of the fifth control switch and the second end of the sixth control switch;

[0030] Among them, when the second coil is energized, the first end of the third control switch is connected to the second end of the third control switch, and the first end of the fourth control switch is connected to the second end of the fourth control switch; when the third coil is energized, the first end of the fifth control switch is connected to the second end of the fifth control switch, and the first end of the sixth control switch is connected to the second end of the sixth control switch.

[0031] Optionally, the alarm component includes: an alarm light and / or a buzzer.

[0032] Optionally, the valve position simulation teaching device further includes: a valve position simulation rocker assembly, used for triggering a limit switch.

[0033] Optionally, the valve position simulation rocker assembly includes:

[0034] A rocker hand wheel, wherein a handle is provided on the rocker hand wheel;

[0035] A rocker screw rod connected to a rocker hand wheel;

[0036] A rocker support, connected to the rocker screw rod;

[0037] The rocker sliding block is inserted into the rocker screw rod;

[0038] A connecting rod is connected to the rocker sliding block, and a contact of a limit switch is arranged on the connecting rod.

[0039] Optionally, the valve position simulation teaching device further includes: a status indication switch connected between the status indicator light and the second end of the first control switch.

[0040] Optionally, the valve position simulation teaching device also includes: a digital indication switch connected between the digital display component and the power supply.

[0041] Optionally, the valve position simulation teaching device further includes: a voltage indicating switch connected between the voltmeter and the third end of the first control switch.

[0042] Optionally, the valve position simulation teaching device further includes: an alarm indication switch connected to the fault alarm.

[0043] By means of the above technical scheme, the valve position simulation teaching device includes a power supply, a limit switch, a first relay, a status indicator light, a voltmeter, a digital display component and a fault alarm. The power supply is used to power the entire valve position simulation teaching device. The limit switch is used to simulate the change of the valve position, and the first relay controls the status indicator light, the voltmeter, the digital display component and the fault alarm according to the change of the valve position. Thus, the various actual states of the limit switch are fed back by the status indicator light, the voltmeter, the digital display component and the fault alarm, and the teaching of the relationship between the valve position change and a variety of display screens is realized simultaneously in a limited space, so that the technicians can intuitively view the real effect diagram fed back to the main control screen, thereby deepening the technicians' combination of theory and practice, and mastering the relationship between the combination of logical state and display, which helps to improve the technical personnel's skill level.

[0044] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0046] Figure 1 One of the structural schematic diagrams of the valve position simulation teaching device provided in an embodiment of the present application is shown;

[0047] Figure 2 The second structural schematic diagram of the valve position simulation teaching device provided in the embodiment of the present application is shown;

[0048] Figure 3 One of the partial structural schematic diagrams of the valve position simulation teaching device provided in the embodiment of the present application is shown;

[0049] Figure 4 The second partial structural schematic diagram of the valve position simulation teaching device provided in the embodiment of the present application is shown;

[0050] Figure 5 The third partial structural diagram of the valve position simulation teaching device provided in the embodiment of the present application is shown;

[0051] Figure 6 A fourth partial structural schematic diagram of the valve position simulation teaching device provided in an embodiment of the present application is shown;

[0052] Figure 7 A fifth partial structural diagram of the valve position simulation teaching device provided in an embodiment of the present application is shown;

[0053] Figure 8 A structural schematic diagram of a digital tube provided in an embodiment of the present application is shown.

[0054] Reference numerals:

[0055] 10 power supply, 20 limit switch, 21 open limit switch, 22 closed limit switch, 30 first relay, 31 open relay, 32 closed relay, 40 status indicator light, 41 valve switch indicator light, 42 valve reset indicator light, 50 voltmeter, 51 first voltmeter, 52 second voltmeter, 60 digital display component, 61 open digital display component, 62 closed digital display component, 70 fault alarm, 71 second relay, 72 third relay, 73 alarm component, 80 valve position simulation joystick component, 91 status indication switch, 92 digital indication switch, 93 voltage indication switch, 94 alarm indication switch, 411 open indicator light, 412 closed indicator light, 421 light-transmitting cover, 422 first light-emitting element, 423 second light-emitting element, 911 switch status indication switch, 912 reset status indication switch. DETAILED DESCRIPTION

[0056] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0057] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0058] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, or there may be intermediate elements. In addition, the "connection" or "connection" used herein may include wireless connection or wireless fusion. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0059] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0060] In this embodiment, a valve position simulation teaching device is provided. Figure 1 and Figure 2 As shown, the device includes: a power supply 10, a limit switch 20, a first relay 30, a status indicator light 40, a voltmeter 50, a digital display component 60 and a fault alarm 70.

[0061] Specifically, the limit switch 20 is connected to the power supply 10. The first relay 30 includes: a first control switch, a second control switch and a first coil. The first end of the first control switch is connected to the power supply 10. The first end of the second control switch is connected to the power supply 10. The first coil is connected to the limit switch 20 and the power supply 10, wherein, when the first coil is powered on, the first end of the first control switch is connected to the second end of the first control switch, the first end of the second control switch is connected to the second end of the second control switch, and when the first coil is powered off, the first end of the first control switch is connected to the third end of the first control switch, and the first end of the second control switch is connected to the third end of the second control switch. The status indicator 40 is connected to the power supply 10 and the second end of the first control switch. The voltmeter 50 is connected to the power supply 10 and the third end of the first control switch. The first end of the digital display component 60 is connected to the power supply 10, the second end of the digital display component 60 is connected to the second end of the second control switch, and the third end of the digital display component 60 is connected to the third end of the second control switch. The fault alarm 70 is connected to the power supply 10 and the second end of the first control switch.

[0062] In a specific application scenario, the power supply 10 may be a 24V DC power supply 10 .

[0063] In this embodiment, the second end of the first control switch is connected to the status indicator light 40 and the fault alarm 70, and the third end of the first control switch is connected to the voltmeter 50. The first control switch can be used to control the fault alarm 70, the status indicator light 40 and the voltmeter 50. The second end and the third end of the second control switch are connected to the digital display component 60, and the second control switch can be used to control the digital display component 60.

[0064] When the limit switch 20 is triggered, the first coil is energized, and under the action of the first coil, the first end of the first control switch and the second end of the first control switch are attracted, the first end of the first control switch and the third end of the first control switch are disconnected, and the status indicator light 40 is powered on and illuminated, so as to indicate whether the limit switch 20 is triggered by waiting for the light to be dark. At this time, if the limit switch 20 is triggered abnormally, the fault alarm 70 works. When the limit switch 20 is not triggered, the first coil is de-energized, the first end and the third end of the first control switch are connected, the first end and the second end of the first control switch are disconnected, and the voltmeter 50 is powered on to display the current voltage.

[0065] Similarly, when the limit switch 20 is triggered and the first coil is energized, the first end of the second control switch and the second end of the second control switch are connected under the action of the first coil, and the digital display component 60 is energized and displayed in the first digital display form; when the limit switch 20 is not triggered and the first coil is energized, the first end and the third end of the second control switch are connected under the action of the first coil, and the digital display component 60 is energized and displayed in the second digital display form. Thus, different states of different limit switches 20 can be displayed through different digital display forms.

[0066] Through the valve position simulation teaching device provided in this embodiment, various actual states of the limit switch 20 can be fed back through the status indicator light 40, the voltmeter 50, the digital display component 60 and the fault alarm 70, and the teaching of the relationship between the valve position change and a variety of display screens can be realized simultaneously in a limited space, so that the technicians can intuitively view the real effect diagram fed back to the main control screen, thereby deepening the technicians' understanding of the combination of theory and practice, and mastering the relationship between the logical state and the display combination, which helps to improve the technicians' skill level.

[0067] In a specific application scenario, the status indicator light 40 may include a valve switch indicator light 41 and / or a valve reset indicator light 42. The valve switch indicator light 41 is used to indicate whether the valve is open or closed, and the valve reset indicator light 42 is used to indicate whether the valve is reset after being opened or closed.

[0068] It is worth mentioning that, since the valve position simulation teaching device integrates a variety of devices for distinguishing the valve position status (status indicator light 40, voltmeter 50, digital display assembly 60 and fault alarm 70), in order to increase the flexibility and pertinence of teaching, the status indicator light 40, voltmeter 50, digital display assembly 60 and fault alarm 70 can be started or closed respectively by setting corresponding switches in the valve position simulation teaching device. Specifically, the indication function of the status indicator light 40 is controlled by the status indication switch 91 connected between the status indicator light 40 and the second end of the first control switch. The indication function of the digital display assembly 60 is controlled by the digital indication switch 92 connected between the digital display assembly 60 and the power supply 10. The indication function of the voltmeter 50 is controlled by the voltage indication switch 93 connected between the voltmeter 50 and the third end of the first control switch. The indication function of the fault alarm 70 is controlled by the alarm indication switch 94 connected to the fault alarm 70.

[0069] Further, considering that the state indicator light 40 includes a valve switch indicator light 41 and a valve reset indicator light 42, the state indicator switch 91 also includes a switch state indicator switch 911 and a reset state indicator switch 912 to realize respective control functions.

[0070] Furthermore, the limit switch 20 includes an open limit switch 21 and a closed limit switch 22, and the open limit switch 21 and the closed limit switch 22 are triggered in an alternating manner, that is, the open limit switch 21 and the closed limit switch 22 cannot be triggered at the same time. As a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate this embodiment, Figure 2 As shown, the first relay 30 includes: an open relay 31 and a closed relay 32. The open relay 31 is connected to the open limit switch 21, and is used to control the status indicator light 40, the voltmeter 50, the digital display component 60 and the fault alarm 70 when the valve is in the open state. The closed relay 32 is connected to the closed limit switch 22, and is used to control the status indicator light 40, the voltmeter 50, the digital display component 60 and the fault alarm 70 when the valve is in the closed state.

[0071] Specifically, Figure 2 and Figure 3 As shown, the valve switch indicator light 41 includes: an open position indicator light 411 and a closed position indicator light 412. The open position indicator light 411 is connected to the power supply 10 and the second end of the first control switch of the open position relay 31. The closed position indicator light 412 is connected to the power supply 10 and the second end of the first control switch of the closed position relay 32.

[0072] It is understandable that the on-position indicator light 411 and the off-position indicator light 412 may use different display parameters to facilitate differentiation, such as different colors, different brightness or different flashing frequencies.

[0073] In this embodiment, the open and closed states of the valve are displayed respectively by the open position indicator light 411 and the closed position indicator light 412, so that technicians can intuitively know the changes of the valve switch indicator light 41 when the limit switch 20 is triggered or not triggered, thereby achieving the purpose of understanding the relationship between the valve logical state and the display form.

[0074] For example, the open position indicator light 411 is a red light and the closed position indicator light 412 is a green light. Figure 3 As shown, when the valve is in the open state of normal operation, the open limit switch 21 is triggered to close, and the voltage provided by the power supply 10 is transmitted from line 1 of the positive terminal row BX1 to the first end of the open limit switch 21, and then from the second end of the closed open limit switch 21 to the first coil E1 of the open relay 31, and then returns to the negative terminal row BX2 and the power supply 10 through the first coil E1 to form a power supply circuit. At this time, the first coil E1 of the open relay 31 is energized, completing the pull-in function of the first coil E1. At this time, the circuit will enter the voltage from line 2 of the positive terminal row BX1 through the first end b of the first control switch on the open relay 31, and come out from the second end X8 of the first control switch after closing, and then to the switch state indication switch 911 of the open indicator light 411. If the switch status indicating switch 911 is closed, the voltage will reach the open position indicator light 411, and the negative pole of the open position indicator light 411 is connected to the power supply 10 through the negative terminal row BX2 to form a loop, and the open position indicator light 411 lights up, reaching the normal red light display of the open limit.

[0075] Similarly, when the valve is in the closed state of normal operation, the closed position limit switch 22 is triggered to close, and the voltage is transmitted from line 1 of the positive terminal row BX1 to the first end of the closed position limit switch 22, and then from the second end of the closed position limit switch 22 to the first coil E2 of the closed position relay 32, and then returns to the negative terminal row BX2 and the power supply 10 through the first coil E2 to form a power supply circuit. At this time, the first coil E2 of the closed position relay 32 is energized, completing the pull-in function of the first coil E2. At this time, the circuit will enter the voltage from line 2 of the positive terminal row BX1 through the first end d of the first control switch on the closed position relay 32, and come out from the second end X9 of the first control switch after closing, and then to the switch state indicating switch 911 of the closed position indicator 412. If the switch state indicating switch 911 is closed, the voltage will reach the closed position indicator 412, and the negative pole of the closed position indicator 412 will be connected to the power supply 10 through the negative terminal row BX2 to form a circuit, and then the closed position indicator 412 will light up, reaching the green light display of the normal closed limit.

[0076] Specifically, Figure 2 and Figure 4As shown, the voltmeter 50 includes: a first voltmeter 51 and a second voltmeter 52. The first voltmeter 51 is connected to the power supply 10 and the third end of the first control switch of the open position relay 31. The second voltmeter 52 is connected to the power supply 10 and the third end of the first control switch of the closed position relay 32.

[0077] In this embodiment, not only can the first voltmeter 51 and the second voltmeter 52 detect the line voltage value when the valve is in the non-open and closed states, so that the technician can know the voltage impact caused by the valve position change, but the technician can also sense whether the limit switch 20 is triggered through the voltage change, so as to facilitate the verification of whether the limit switch 20 is abnormal. Through the above embodiment, the change of the voltmeter 50 when the limit switch 20 is triggered or not can be displayed in an intuitive way, so as to achieve the purpose of mastering the relationship between the valve logic state and the display form.

[0078] For example, Figure 4 As shown, when the opening limit switch 21 is not triggered, the voltage enters from the No. 2 line of the positive terminal row BX1 to the first terminal b of the first control switch of the opening relay 31, and reaches the voltage indicating switch 93 through the normally closed third terminal X12 of the first control switch. If the voltage indicating switch 93 is closed, the voltage can reach the first voltmeter 51, and return to the negative terminal row BX2 and the power supply 10 through the negative pole of the first voltmeter 51, forming a power supply circuit to realize the function of line voltage display when the opening limit switch 21 is not triggered. On the contrary, when the opening limit switch 21 is triggered, the normally closed third terminal X12 of the first control switch on the opening relay 31 is disconnected from the first terminal b of the first control switch, and the first voltmeter 51 loses power and has no voltage display.

[0079] Similarly, when the closing position limit switch 22 is not triggered, the voltage enters from the No. 2 line of the positive terminal row BX1 to the first terminal d of the first control switch of the closing position relay 32, and reaches the voltage indicating switch 93 through the normally closed third terminal X14 of the first control switch. If the voltage indicating switch 93 is closed, the voltage can reach the second voltmeter 52, and return to the negative terminal row BX2 and the power supply 10 through the negative pole of the second voltmeter 52, forming a power supply circuit to realize the function of displaying the line voltage when the closing position limit switch 22 is not triggered. On the contrary, when the closing position limit switch 22 is triggered, the normally closed third terminal X14 of the first control switch of the closing position relay 32 is disconnected from the first terminal d of the first control switch, and the second voltmeter 52 loses power and has no voltage display.

[0080] Specifically, Figure 2 and Figure 5As shown, the digital display component 60 includes: an on digital display component 61 and an off digital display component 62. Among them, the second end of the on digital display component 61 is connected to the second end of the second control switch of the on relay 31, and the third end of the on digital display component 61 is connected to the third end of the second control switch of the on relay 31. The second end of the off digital display component 62 is connected to the second end of the second control switch of the off relay 32, and the third end of the off digital display component 62 is connected to the third end of the second control switch of the off relay 32.

[0081] In this embodiment, the open digital display component 61 is connected to the second end and the third end of the second control switch of the open relay 31. Therefore, when the open limit switch 21 is triggered, that is, the valve is in the open position, when the first coil E1 of the open relay 31 is energized, the first end of the second control switch of the open relay 31 and the second end of the second control switch are connected under the action of the first coil E1, and the digital display component 60 is energized and displayed in the first digital display form. When the open limit switch 21 is not triggered, the first end and the third end of the second control switch are normally closed and connected, and the digital display component 60 is energized and displayed in the second digital display form. Therefore, different states of the open limit switch 21 can be displayed through different digital display forms, and at the same time, it can be combined with devices such as the status indicator light 40, the voltmeter 50, and the fault alarm 70 so that technicians can quickly know whether the open limit switch 21 is faulty.

[0082] Similarly, the closing digital display assembly 62 is connected to the second end and the third end of the second control switch of the closing position relay 32. Therefore, when the closing position limit switch 22 is triggered, that is, the valve is in the closing position, when the first coil E2 of the closing position relay 32 is energized, the first end of the second control switch of the closing position relay 32 and the second end of the second control switch are connected under the action of the first coil E2, and the digital display assembly 60 is energized and displayed in the first digital display form. When the closing position limit switch 22 is not triggered, the first end and the third end of the second control switch are normally closed and connected, and the digital display assembly 60 is energized and displayed in the second digital display form. Therefore, different states of the closing position limit switch 22 can be displayed through different digital display forms, and at the same time, it can be combined with devices such as the status indicator light 40, the voltmeter 50, and the fault alarm 70 so that technicians can quickly know whether the closing position limit switch 22 is faulty.

[0083] In specific application scenarios, such as Figure 2 and Figure 5 As shown, the digital display component 60 includes: a current limiting resistor and a digital tube.

[0084] Specifically, the current limiting resistor is connected to the power supply 10. The first end of the digital tube is connected to the current limiting resistor, the second end of the digital tube is connected to the second end of the second control switch, and the second end of the digital tube is connected to the third end of the second control switch.

[0085] In this embodiment, the digital tube displays numbers when powered on. Moreover, since the current-limiting resistor changes the current flowing through the digital tube, high-level electricity is converted into low-level electricity, so that the digital tube presents different digital display forms. Therefore, the technicians can intuitively know the changes of the digital display assembly 60 when the limit switch 20 is triggered or not triggered, so as to achieve the purpose of understanding the relationship between the valve logic state and the display form.

[0086] For example, Figure 5 As shown, when the open limit switch 21 and the open limit switch 21 are not closed, the voltage passes through the No. 3 line of the positive terminal row BX1 to the digital indication switch 92. If the digital indication switch 92 is closed, the voltage will reach the current limiting resistors (R1, R2) of the open digital display component 61 and the closed digital display component 62, and the digital tubes (KS1, KS2) of the open digital display component 61 and the closed digital display component 62 are powered. At this time, the second end of the digital tube KS1 of the open digital display component 61 is connected to the normally closed third end X5 of the second control switch of the open relay 31, and the negative pole of the voltage returns from the first end a of the second control switch of the open relay 31 to the negative terminal row BX2 and the power supply 10 to form a loop. At this time, the digital tube KS1 displays a low level 0. At the same time, the second end of the digital tube KS2 of the off-position digital display component 62 is connected to the normally closed third end X10 of the second control switch of the off-position relay 32, and the negative pole of the voltage returns from the first end c of the second control switch of the off-position relay 32 to the negative terminal row BX2 and the power supply 10 to form a loop. At this time, the digital tube KS2 displays a low level 0. Thus, the display form of 0-0 indicates that the valve is not open or closed.

[0087] Furthermore, when the open limit switch 21 is closed, after the open relay 31 is energized and attracted, the normally closed third terminal X5 of the second control switch is disconnected from the first terminal a, and the circuit is converted to the first terminal a and the second terminal X7 of the second control switch are connected, and the digital tube KS1 displays a high level 1. Due to the alternating triggering conditions of the open limit switch 21 and the closed limit switch 22, the closed limit switch 22 must be in an unclosed state at this time, so the digital tube KS2 still displays a low level 0. Thus, the valve opening is indicated in the form of 1-0. Similarly, when the closed limit switch 22 is closed, after the closed relay 32 is energized and attracted, the normally closed third terminal X10 of the second control switch is disconnected from the first terminal c, and the circuit is converted to the first terminal c and the second terminal X11 of the second control switch are connected, and the digital tube KS2 displays a high level 1. Due to the alternating triggering conditions of the open limit switch 21 and the closed limit switch 22, the open limit switch 21 must be in an unclosed state at this time, so the digital tube KS1 still displays a low level 0. Thus, the valve closed position is indicated in the form of 0-1.

[0088] It can be understood that when the valve is in the open or closed state, that is, when one of the open or closed limit switches 20 is not closed, if both the digital tube KS1 and the digital tube KS2 display a low level 0, it means that there is a double zero fault in the limit switch 20. If both the digital tube KS1 and the digital tube KS2 display a high level 1, it means that there is a double one fault in the limit switch 20.

[0089] In specific application scenarios, the digital tube circuit structure is as follows Figure 8 As shown, the digital tube includes a plurality of common anodes (u1, u2, u3, u4, u5, u6, u7) connected to the current limiting resistor, a plurality of first diodes (D1, D2, D3, D4, D5, D6, D7) and a second diode D8 connected to the plurality of common anodes. Thus, after the digital tube is powered on, different forms of digital display can be realized by controlling the common anode to emit light.

[0090] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate this embodiment, as shown in FIG. Figure 2 and Figure 6 As shown, the valve reset indicator light 42 includes: a light-transmitting cover 421 , a first light-emitting element 422 and a second light-emitting element 423 .

[0091] Specifically, the first light emitting element 422 and the second light emitting element 423 are both located in the light-transmitting cover 421. The first light emitting element 422 is connected to the power supply 10 and the second end of the first control switch of the on-position relay 31. The second light emitting element 423 is connected to the power supply 10 and the second end of the first control switch of the off-position relay 32.

[0092] It should be noted that, in order to distinguish the precise on position and the off position, the first light emitting element 422 and the second light emitting element 423 may use different display parameters.

[0093] In this embodiment, when the open limit switch 21 is triggered, the first end and the second end of the first control switch are connected under the action of the first coil E1 of the open relay 31 being energized, and the first light-emitting element 422 is powered on and emits light. On the contrary, the open limit switch 21 is not triggered, the first end and the third end of the first control switch of the open relay 31 are connected, and the first light-emitting element 422 is powered off and does not emit light. When the closed limit switch 22 is triggered, the first end and the second end of the first control switch are connected under the action of the first coil E2 of the closed relay 32 being energized, and the second light-emitting element 423 is powered on and emits light. On the contrary, the closed limit switch 22 is not triggered, the first end and the third end of the first control switch of the closed relay 32 are connected, and the second light-emitting element 423 is powered off and does not emit light. Therefore, the valve position of the current valve can be accurately judged through the effect presented by the light-transmitting cover 421. Furthermore, since the first light emitting element 422 and the second light emitting element 423 are both located under the light-transmitting cover 421, if any of the open and close position limit switches 22 is not reset and is always in a closed state, the first light emitting element 422 and the second light emitting element 423 are lit at the same time. At this time, based on the color spectrum formed by the first light emitting element 422 and the second light emitting element 423 being lit at the same time, a differential reset alarm prompt is realized, thereby facilitating the technicians to learn the logical relationship between the display form of the valve reset indicator light 42 and the valve position change.

[0094] For example, the first light emitting element 422 is a red light and the second light emitting element 423 is a green light. When the open limit switch 21 is closed, the first coil E1 of the open relay 31 is electrically attracted, and the voltage from the second end X8 of the first control switch reaches the first light emitting element 422 (red light) through the closed reset state indicating switch 912, and the voltage returns from the negative pole to the negative terminal row BX2 and the power supply 10 to form a loop, and the red light is on. At this time, the light-transmitting cover 421 is red under the action of the red light. When the close limit switch 22 is closed, the first coil E2 of the close relay 32 is electrically attracted, and the voltage from the second end X9 of the first control switch of the close relay 32 reaches the second light emitting element 423 (green light) through the closed reset state indicating switch 912, and the voltage returns from the negative pole to the negative terminal row BX2 and the power supply 10 to form a loop, and the green light is on. At this time, the light-transmitting cover 421 is red under the action of the green light. When the above-mentioned valve is in an open or closed state, if the other limit switch 20 is not reset and remains in a closed state, the red light and the green light are on at the same time (double-one state). Then, due to the color spectrum formed by the red light for opening the valve and the green light for closing the valve being on at the same time, the light-transmitting cover 421 will turn yellow for warning.

[0095] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate this embodiment, as shown in FIG. Figure 2 and Figure 7As shown, the fault alarm 70 includes: a second relay 71 , a third relay 72 and an alarm component 73 .

[0096] Specifically, the second relay 71 includes: a third control switch, a fourth control switch and a second coil. The first end of the third control switch is connected to the second end of the first control switch of the open position relay 31. The first end of the fourth control switch is connected to the second end of the first control switch of the open position relay 31. The second coil is connected to the second end of the first control switch of the closed position relay 32 and the power supply 10. The third relay 72 includes: a fifth control switch, a sixth control switch and a third coil. The first end of the third control switch is connected to the second end of the first control switch of the closed position relay 32. The first end of the fourth control switch is connected to the second end of the fourth control switch. The third coil is connected to the second end of the third control switch and the power supply 10. The alarm component 73 is connected to the second end of the fifth control switch and the second end of the sixth control switch.

[0097] Among them, when the second coil is energized, the first end of the third control switch is connected to the second end of the third control switch, and the first end of the fourth control switch is connected to the second end of the fourth control switch; when the third coil is energized, the first end of the fifth control switch is connected to the second end of the fifth control switch, and the first end of the sixth control switch is connected to the second end of the sixth control switch.

[0098] In this embodiment, when the closing limit switch 22 is closed, after the first coil of the closing relay 32 is attracted, the second coil of the second relay 71 is energized, and the first end and the second end of the third control switch are connected. If the opening limit switch 21 is closed at this time, after the first coil of the opening relay 31 is attracted, the third coil of the third relay 72 is energized, the first end and the second end of the fifth control switch, and the first end and the second end of the sixth control switch are attracted under the action of the third coil, and form a power supply circuit of the alarm component 73. At this time, the alarm component 73 is powered to work to remind the technician that the opening and closing limit switches 22 are triggered at the same time, and there is a risk of failure. If the closing limit switch 22 is closed, the opening limit switch 21 is not closed, the first end of the third control switch is connected to the normally closed third end, and the power supply circuit of the third coil is in an open circuit state, so that the alarm component 73 will not be triggered.

[0099] In a specific application scenario, the alarm component 73 includes: an alarm light and / or a buzzer.

[0100] For example, when the valve is in the open or closed state, if the open limit switch 21 and the closed limit switch 22 are both in the closed state, the first coils (E1, E2) of the open relay 31 and the closed relay 32 are electrically attracted at the same time, and a voltage from the second end X8 of the first control switch of the open relay 31 to the first end e of the third control switch of the second relay 71 of the fault alarm 70 and the first end f of the fourth control switch of the second relay 71 is output from the second end X9 of the first control switch of the closed relay 32 to the second coil E3 of the second relay 71, so that the second coil E3 is electrically attracted. Another voltage from the closed relay 32 to the first end g of the fifth control switch of the third relay 72, and because the second coil E3 is attracted, the first end e of the third control switch is connected to the second end X15, and the first end f of the fourth control switch is connected to the second end X16. As a result, the third coil E4 of the third relay 72 is electrically attracted, and the first end g of the fifth control switch is connected to the second end X17. In this way, the voltage signal from the open limit switch 21 enters the alarm indication switch 94 from f→X16→h→X18, and at the same time, the voltage signal from the closed limit switch 22 enters the alarm indication switch 94 from g→X17. If the alarm indication switch 94 is closed, these two groups of voltage signals are transmitted through the alarm indication switch 94 to the flashing light HD and the buzzer LS in the alarm component 73, realizing the alarm function of the flashing light HD and the buzzer LS.

[0101] Furthermore, if Figure 2 As shown, as a refinement and extension of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, the valve position simulation teaching device also includes: a valve position simulation rocker assembly 80 for triggering the limit switch 20.

[0102] It is understandable that the valve position simulation rocker assembly 80 can be manually controlled to trigger the limit switch 20, and can also automatically trigger the limit switch 20 according to a signal instruction from a processor.

[0103] In a specific application scenario, the valve position simulation rocker assembly includes: a rocker handwheel, a rocker screw, a rocker support, a rocker sliding block and a connecting rod. Among them, a handle is provided on the rocker handwheel to facilitate user operation. The rocker screw is connected to the rocker handwheel. The rocker support is connected to the rocker screw to limit the rocker sliding block through the rocker support. The rocker sliding block is inserted into the rocker screw. The connecting rod is connected to the rocker sliding block, and the connecting rod is provided with a contact of a limit switch.

[0104] In this embodiment, the technician can operate the rocker screw on the rocker hand wheel to rotate, so that the rocker slide block on the rocker screw moves to simulate the opening and closing of the valve. When the rocker slide block moves to the first position, the closed contact on the connecting rod connected to the rocker slide block contacts the open limit switch, and the open limit switch is triggered. When the rocker slide block moves to the second position, the closed contact on the connecting rod connected to the rocker slide block contacts the closed limit switch, and the closed limit switch is triggered. In this way, the simulation of the valve position change is realized, and the display feedback training teaching of various valves in different working states is completed.

[0105] It is worth mentioning that in order to facilitate the control of the rocker slider, the rocker screw and the rocker slider can be connected by threads, or the valve can be provided with an air source through a rocker handwheel. When there is an air source, the rocker slider moves to the first position, and when there is no air source, the rocker slider moves to the second position.

[0106] Those skilled in the art will appreciate that the valve position simulation teaching device structure provided in this embodiment does not constitute a limitation on the valve position simulation teaching device, and may include more or fewer components, or a combination of certain components, or different component arrangements.

[0107] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0108] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A valve position simulation teaching device, characterized in that: The device comprises: power supply; A limit switch connected to the power supply; A first relay, the first relay comprising: a first control switch, wherein a first end of the first control switch is connected to the power supply; a second control switch, wherein a first end of the second control switch is connected to the power supply; a first coil, the first coil being connected to the limit switch and the power supply, wherein when the first coil is powered on, the first end of the first control switch is connected to the second end of the first control switch, and the first end of the second control switch is connected to the second end of the second control switch, and when the first coil is powered off, the first end of the first control switch is connected to the third end of the first control switch, and the first end of the second control switch is connected to the third end of the second control switch; a status indicator light connected to the power supply and the second end of the first control switch; a voltmeter connected to the power supply and a third terminal of the first control switch; A digital display component, wherein a first end of the digital display component is connected to the power supply, a second end of the digital display component is connected to the second end of the second control switch, and a third end of the digital display component is connected to the third end of the second control switch; A fault alarm is connected to the power supply and the second end of the first control switch.

2. The valve position simulation teaching device according to claim 1, characterized in that: The status indicator light includes: a valve switch indicator light and / or a valve reset indicator light.

3. The valve position simulation teaching device according to claim 1 is characterized in that: The digital display component comprises: a current limiting resistor connected to the power supply; A digital tube, wherein the first end of the digital tube is connected to the current limiting resistor, the second end of the digital tube is connected to the second end of the second control switch, and the second end of the digital tube is connected to the third end of the second control switch.

4. The valve position simulation teaching device according to claim 2 is characterized in that: The limit switch includes an open limit switch and a closed limit switch; The first relay comprises: an opening relay connected to the opening limit switch; a closing position relay connected to the closing position limit switch; The valve switch indicator light comprises: an open position indicator light connected to the power supply and the second end of the first control switch of the open position relay; an off-position indicator light connected to the power supply and the second end of the first control switch of the off-position relay; The voltmeter comprises: a first voltmeter connected to the power supply and a third end of the first control switch of the open position relay; a second voltmeter connected to the power supply and a third end of the first control switch of the off-position relay; The digital display component comprises: an open digital display component; a second end of the open digital display component is connected to the second end of the second control switch of the open relay, and a third end of the open digital display component is connected to the third end of the second control switch of the open relay; An off digital display component, the second end of the off digital display component is connected to the second end of the second control switch of the off position relay, and the third end of the off digital display component is connected to the third end of the second control switch of the off position relay.

5. The valve position simulation teaching device according to claim 4 is characterized in that: The valve reset indicator light comprises: Transparent cover; A first light emitting element is located in the light-transmitting cover, and the first light emitting element is connected to the power supply and the second end of the first control switch of the open position relay; The second light emitting element is located in the light-transmitting cover, and the second light emitting element is connected to the power supply and the second end of the first control switch of the off-position relay.

6. The valve position simulation teaching device according to claim 4, characterized in that: The fault alarm comprises: A second relay, the second relay comprising: a third control switch, a first end of the third control switch being connected to a second end of the first control switch of the open position relay; a fourth control switch, a first end of the fourth control switch being connected to a second end of the first control switch of the open position relay; a second coil, the second coil being connected to a second end of the first control switch of the off-position relay and the power supply; A third relay, the third relay comprising: a fifth control switch, a first end of the fifth control switch being connected to a second end of the first control switch of the off-position relay; a sixth control switch, wherein a first end of the sixth control switch is connected to a second end of the fourth control switch; a third coil, the third coil being connected to the second end of the third control switch and the power supply; an alarm component connected to the second end of the fifth control switch and the second end of the sixth control switch; Among them, when the second coil is energized, the first end of the third control switch is connected to the second end of the third control switch, and the first end of the fourth control switch is connected to the second end of the fourth control switch; when the third coil is energized, the first end of the fifth control switch is connected to the second end of the fifth control switch, and the first end of the sixth control switch is connected to the second end of the sixth control switch.

7. The valve position simulation teaching device according to claim 6, characterized in that: The alarm component includes: an alarm light and / or a buzzer.

8. The valve position simulation teaching device according to any one of claims 1 to 7, characterized in that: The device also includes: The valve position simulation rocker assembly is used to trigger the limit switch.

9. The valve position simulation teaching device according to claim 8, characterized in that: The valve position simulation rocker assembly comprises: A rocker hand wheel, wherein the rocker hand wheel is provided with a handle; A rocker screw rod connected to the rocker hand wheel; A rocker support, connected to the rocker screw rod; A rocker sliding block is inserted into the rocker screw rod; A connecting rod is connected to the rocker sliding block, and a contact of the limit switch is arranged on the connecting rod.

10. The valve position simulation teaching device according to any one of claims 1 to 7, characterized in that: The device also includes: a status indicating switch connected between the status indicating lamp and the second end of the first control switch; and / or, A digital indicating switch connected between the digital display component and the power supply; and / or, a voltage indicating switch connected between the voltage meter and the third end of the first control switch; and / or, An alarm indicating switch is connected to the fault alarm.

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