Double-branch temperature element switching device

Abstract

The utility model relates to a double-branch temperature element switching device, which relates to the field of temperature detection, and comprises a first control module, a second control module and a third control module, a first input interface of the first control module is used for being connected with a first output interface of the double-branch temperature element; a second input interface of the first control module is used for being connected with a second output interface of the double-branch temperature element; a third input interface of the first control module is used for being connected with a first output interface of the decentralized control system; a first output interface of the first control module is used for being connected with a first input interface of the decentralized control system; the second output interface of the first control module is connected with the first input interface of the second control module, and the third output interface of the first control module is connected with the first input interface of the third control module, so that automatic switching of double temperature elements can be realized, and the reliability and adaptability of temperature detection are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of temperature detection, and in particular to a double-branch temperature element switching device. Background Art

[0002] In the related art, the temperature detection element commonly used is a double-branch temperature element. This type of temperature element contains two sets of independent temperature output interfaces, and usually only one set of temperature outputs is used. The other set of temperature output interfaces is used as a backup. When the temperature output in use fails, manual wiring is required to reconnect the data transmission line to the backup temperature output interface. The related art has the problems of inconvenient switching operation, low reliability of temperature collection, long switching process time and high maintenance cost. Utility Model Content

[0003] The purpose of the present disclosure is to provide a double-branch temperature element switching device, which can realize automatic switching of double-branch temperature elements.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a dual-branch temperature element switching device, including a first control module, a second control module and a third control module;

[0005] The first input interface of the first control module is used to connect to the first output interface of the dual-branch temperature element, so that the first control module receives the first temperature signal sent by the dual-branch temperature element;

[0006] The second input interface of the first control module is used to connect with the second output interface of the double-branch temperature element, so that the first control module receives the second temperature signal sent by the double-branch temperature element;

[0007] The third input interface of the first control module is used to connect to the first output interface of the distributed control system, so that the first control module receives the command signal sent by the distributed control system;

[0008] The first output interface of the first control module is used to connect to the first input interface of the distributed control system, so that the first control module sends the first temperature signal or the second temperature signal to the distributed control system;

[0009] The second output interface of the first control module is connected to the first input interface of the second control module, and the third output interface of the first control module is connected to the first input interface of the third control module. The first control module is used to selectively send the command signal to the second control module or the third control module, and the second control module is used to connect the first input interface of the first control module and the first output interface of the dual-branch temperature element according to the command signal. The third control module is used to connect the second input interface of the first control module and the second output interface of the dual-branch temperature element according to the command signal.

[0010] Optionally, the second control module includes a first electrical switch, and the first electrical switch connects a first input interface of the first control module and a first output interface of the dual-branch temperature element according to the command signal;

[0011] The third control module includes a second electrical switch, and the second electrical switch connects the second input interface of the first control module and the second output interface of the dual-branch temperature element according to the command signal.

[0012] Optionally, the first electrical switch of the second control module is connected to the second electrical switch of the third control module to transmit an interlock signal between the first electrical switch and the second electrical switch so that when the first electrical switch is closed, the second electrical switch is opened, and when the second electrical switch is closed, the first electrical switch is closed and opened.

[0013] Optionally, the second control module includes a first temperature measurement module, and the input interface of the first temperature measurement module is used to connect with the first output interface of the dual-branch temperature element to detect whether the first temperature signal is normal;

[0014] The output interface of the first temperature measuring module is connected to the fourth input interface of the first control module, so that the first temperature measuring module sends a status signal of the first temperature signal to the first control module;

[0015] The third control module includes a second temperature measurement module, the input interface of the second temperature measurement module is used to connect with the second output interface of the double-branch temperature element to detect whether the second temperature signal is normal;

[0016] The output interface of the second temperature measuring module is connected to the fifth input interface of the first control module, so that the second temperature measuring module sends a status signal of the second temperature signal to the first control module.

[0017] Optionally, the fourth output interface of the first control module is used to connect to the second input interface of the distributed control system, so that the first control module sends a status signal of the first temperature signal or a status signal of the second temperature signal to the distributed control system.

[0018] Optionally, the second control module includes a first alarm module, and the output interface of the first temperature measurement module is connected to the first alarm module;

[0019] The third control module includes a second alarm module, and the output interface of the second temperature measurement module is connected to the second alarm module.

[0020] Optionally, the first input interface of the first control module includes a first sub-input interface, a second sub-input interface and a third sub-input interface, and the second input interface of the first control module includes a fourth sub-input interface, a fifth sub-input interface and a sixth sub-input interface;

[0021] The dual-branch temperature element is a thermal resistor element, the first sub-input interface of the first control module is used to connect to the first sub-output interface of the thermal resistor element, the second sub-input interface of the first control module is used to connect to the second sub-output interface of the thermal resistor element, the third sub-input interface of the first control module is used to connect to the third sub-output interface of the thermal resistor element, the fourth sub-input interface of the first control module is used to connect to the fourth sub-output interface of the thermal resistor element, the fifth sub-input interface of the first control module is used to connect to the fifth sub-output interface of the thermal resistor element, and the sixth sub-input interface of the first control module is used to connect to the sixth sub-output interface of the thermal resistor element; or,

[0022] The dual-branch temperature element is a thermocouple element, the first sub-input interface of the first control module is used to connect to the first sub-output interface of the thermocouple element, the second sub-input interface of the first control module is used to connect to the second sub-output interface of the thermocouple element, the fourth sub-input interface of the first control module is used to connect to the third sub-output interface of the thermocouple element, and the fifth sub-input interface of the first control module is used to connect to the fourth sub-output interface of the thermocouple element.

[0023] Optionally, a mode switching switch is also included;

[0024] When the mode switch is switched to the first mode, the second control module is connected to the first input interface of the first control module and the first output interface of the dual-branch temperature element.

[0025] When the mode switch is switched to the second mode, the third control module is connected to the second input interface of the first control module and the second output interface of the dual-branch temperature element.

[0026] When the mode switching switch is switched to the third mode, the first control module controls the second control module to connect the first input interface of the first control module and the first output interface of the dual-branch temperature element according to the command signal, or controls the third control module to connect the second input interface of the first control module and the second output interface of the dual-branch temperature element.

[0027] Optionally, it also includes a first indicator light and a second indicator light. When the double-branch temperature switching device transmits the first temperature signal, the first indicator light is on, and when the double-branch temperature switching device transmits the second temperature signal, the second indicator light is on.

[0028] Optionally, it also includes: a power interface for connecting a power source; and a power indicator light, which lights up when the power interface is connected to the power source.

[0029] Through the above technical solution, the device includes three control modules. The first control module can selectively receive the two-way temperature signals of the double-branch temperature element and send them to the distributed control system according to the instructions of the distributed control system. The second control module and the third control module act as switching switches, which are responsible for connecting the two-way input interface of the first control module and the two-way output interface of the double-branch temperature element respectively. When the distributed control system issues a switching instruction, the first control module will pass the switching instruction to the corresponding second control module or the third control module to connect it to the corresponding temperature output interface. The double-branch temperature element switching device can realize automatic switching of temperature output without manual intervention, thereby improving the convenience and efficiency of the switching operation. At the same time, it can also avoid possible mistakes in manual operation and improve the reliability of the entire temperature detection. In addition, automatic switching can also reduce the maintenance cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0031] Figure 1 is a block diagram of a dual-branch temperature element switching device according to an exemplary embodiment of the present disclosure;

[0032] Figure 2 is a structural diagram of a double-branch temperature element switching device according to an exemplary embodiment of the present disclosure;

[0033] Figure 3 is a block diagram of a second control module according to an exemplary embodiment of the present disclosure;

[0034] Figure 4 is a block diagram of a third control module according to an exemplary embodiment of the present disclosure;

[0035] Figure 5 is a wiring diagram showing a connection between a double-branch temperature element switching device and a thermal resistance element according to an exemplary embodiment of the present disclosure;

[0036] Figure 6 It is a wiring diagram showing the connection between a double-branch temperature element switching device and a thermocouple element according to an exemplary embodiment of the present disclosure.

[0037] Description of Reference Numerals

[0038] The first control module 1, the first input interface 11 of the first control module, the first sub-input interface 111 of the first control module, the second sub-input interface 112 of the first control module, the third sub-input interface 113 of the first control module, the second input interface 12 of the first control module, the fourth sub-input interface 121 of the first control module, the fifth sub-input interface 122 of the first control module, the sixth sub-input interface 123 of the first control module, the third input interface 13 of the first control module, the fourth input interface 14 of the first control module, the fifth input interface 15 of the first control module, the first control The first output interface 16 of the module, the second output interface 17 of the first control module, the third output interface 18 of the first control module, the fourth output interface 19 of the first control module, the second control module 2, the first input interface 21 of the second control module, the first electrical switch 22, the interlock signal interface 221 of the first electrical switch, the first temperature measurement module 23, the input interface 231 of the first temperature measurement module, the output interface 232 of the first temperature measurement module, the first alarm module 24, the third control module 3, the first input interface 31 of the third control module, the second electrical switch 32, the interlock signal interface 221 of the second electrical switch Signal interface 321, second temperature measurement module 33, input interface 331 of second temperature measurement module, output interface 332 of second temperature measurement module, second alarm module 34, mode switching switch 4, first mode 41, second mode 42, third mode 43, first indicator light 51, second indicator light 52, power interface 6, power indicator light 61, dual-branch temperature element 7, thermal resistance element 701, thermocouple element 702, first output interface 71 of dual-branch temperature element, first sub-output interface 711 of thermal resistance element, second sub-output interface 712 of thermal resistance element, third sub-output interface 713 of thermal resistance element Output interface 713, first sub-output interface 714 of thermocouple element, second sub-output interface 715 of thermocouple element, second output interface connection 72 of dual-branch temperature element, fourth sub-output interface 721 of thermal resistor element, fifth sub-output interface 722 of thermal resistor element, sixth sub-output interface 723 of thermal resistor element, third sub-output interface 724 of thermocouple element, fourth sub-output interface 725 of thermocouple element, distributed control system 8, first output interface 81 of distributed control system, first input interface 82 of distributed control system, second input interface 83 of distributed control system. DETAILED DESCRIPTION

[0039] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0040] The terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and have no order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0041] Figure 1 is a block diagram of a dual-branch temperature element switching device according to an exemplary embodiment of the present disclosure. Figure 1 The dual-branch temperature element switching device comprises a first control module 1, a second control module 2 and a third control module 3; Figure 2 is a structural diagram of a dual-branch temperature element switching device according to an exemplary embodiment of the present disclosure, referring to Figure 2 , the first input interface 11 of the first control module 1 is used to connect with the first output interface 71 of the double-branch temperature element 7, so that the first control module 1 receives the first temperature signal sent by the double-branch temperature element 7; the second input interface 12 of the first control module 1 is used to connect with the second output interface 72 of the double-branch temperature element 7, so that the first control module 1 receives the second temperature signal sent by the double-branch temperature element 7; the third input interface 13 of the first control module 1 is used to connect with the first output interface 81 of the distributed control system 8, so that the first control module 1 receives the command signal sent by the distributed control system 8; the first output interface 16 of the first control module 1 is used to connect with the first input interface 82 of the distributed control system 8, so that the first control module 1 sends the first temperature signal or the second temperature signal to the distributed control system 8; the second output interface 17 of the first control module 1 is connected to the first input interface 21 of the second control module 2, and the third output interface 18 of the first control module 1 is connected to the first input interface 31 of the third control module 3, the first control module 1 is used to selectively send the command signal to the second control module 2 or the third control module 3, the second control module 2 is used to connect the first input interface 11 of the first control module 1 and the first output interface 71 of the double-branch temperature element 7 according to the command signal, and the third control module 3 is used to connect the second input interface 12 of the first control module 1 and the second output interface of the double-branch temperature element 7 according to the command signal.

[0042] Here, the dual-branch temperature element 7 is composed of two independent temperature sensing elements, which are usually made of the same material and structure and are placed in the same environment for temperature detection. The dual-branch temperature element switching device refers to a device that realizes automatic switching of the dual-branch temperature element 7. The command signal is a control command sent by the distributed control system 8 to the first control module 1, which is used to control the device to switch which output channel of the dual-branch temperature element 7 to use. The first control module 1 can be a power control element such as a contactor, a relay, a microcontroller, a programmable logic controller, etc.

[0043] The double-branch temperature element 7 is usually used in high temperature environments, harsh environments with corrosive gases or vibrations, environments with strict requirements for temperature detection, environments with drastic temperature changes, etc. The double-branch temperature element 7 automatic switching device is controlled by the distributed control system 8 to switch the temperature element, which is more convenient and safer.

[0044] A possible operation process of the device is as follows: first, the first control module 1 receives the command signal sent by the distributed control system 8; then, the first control module 1 selectively sends the command signal to the second control module 2 or the third control module 3 according to the command signal; then, if the second control module 2 receives the command signal, the second control module 2 connects the first input interface 11 of the first control module 1 and the first output interface 71 of the double-branch temperature element 7 according to the command signal, and the first temperature signal is transmitted to the first control module 1; if the third control module 3 receives the command signal, the third control module 3 connects the second input interface 12 of the first control module 1 and the second output interface of the double-branch temperature element 7 according to the command signal, and the second temperature signal is transmitted to the first control module 1; finally, the first control module 1 sends the received first temperature signal or second temperature signal to the distributed control system 8.

[0045] Through the above technical solution, the device includes three control modules. The first control module 1 can selectively receive the two-way temperature signals of the double-branch temperature element 7 and send them to the distributed control system 8 according to the instructions of the distributed control system 8. The second control module 2 and the third control module 3 act as switching switches, which are responsible for connecting the two-way input interface of the first control module 1 and the two-way output interface of the double-branch temperature element 7 respectively. When the distributed control system 8 issues a switching instruction, the first control module 1 will pass the switching instruction to the corresponding second control module 2 or the third control module 3, so that it connects the corresponding temperature output interface. The double-branch temperature element switching device can realize automatic switching of temperature output without manual intervention, thereby improving the convenience and efficiency of the switching operation. At the same time, it can also avoid possible mistakes in manual operation and improve the reliability of the entire temperature detection. In addition, automatic switching can also reduce the maintenance cost of the system.

[0046] Figure 3is a block diagram of a second control module 2 according to an exemplary embodiment of the present disclosure. Figure 4 is a block diagram of a third control module 3 according to an exemplary embodiment of the present disclosure, referring to Figure 2 , Figure 3 and Figure 4 The second control module 2 includes a first electrical switch 22, which connects the first input interface 11 of the first control module 1 and the first output interface 71 of the dual-branch temperature element 7 according to the command signal; the third control module 3 includes a second electrical switch 32, which connects the second input interface 12 of the first control module 1 and the second output interface of the dual-branch temperature element 7 according to the command signal.

[0047] Here, the first electrical switch 22 and the second electrical switch 32 can be electronic components such as relays, contactors, and semiconductor switches. For example, the first electrical switch 22 is a contactor, and the coil terminal of the contactor is the first input interface 21 of the second control module 2, which is connected to the second output interface 17 of the first control module 1 for receiving a command signal. The normally open contact of the contactor is connected to the first output interface 16 of the first control module 1. When the contactor receives the command signal, the contactor coil is energized, and the normally open contact is closed, connecting the first input interface 11 of the first control module 1 and the first output interface 71 of the dual-branch temperature element 7. Based on the implementation method of the contactor as the second electrical switch 32, similar to the above case, the corresponding interface can be connected according to the command signal.

[0048] In one embodiment, referring to Figure 2 The first electrical switch 22 of the second control module 2 is connected to the second electrical switch 32 of the third control module 3 to transmit an interlocking signal between the first electrical switch 22 and the second electrical switch 32, so that when the first electrical switch 22 is closed, the second electrical switch 32 is opened, and when the second electrical switch 32 is closed, the first electrical switch 22 is closed and opened.

[0049] Here, the interlock signal can be transmitted unidirectionally through two unidirectional transmission lines, or bidirectionally through a bidirectional transmission line. When the first electrical switch 22 is closed, the first electrical switch 22 sends an interlock signal to the second electrical switch 32 through the interlock signal interface 221 of the first electrical switch 22, so that the second electrical switch 32 cannot be closed; when the second electrical switch 32 is closed, the second electrical switch 32 sends an interlock signal to the first electrical switch 22 through the interlock signal interface 321 of the second electrical switch 32, so that the first electrical switch 22 cannot be closed. In the above manner, it can be achieved that at any time, only one temperature signal of the dual-branch temperature element 7 is transmitted to the first control module 1.

[0050] In one embodiment, referring to Figure 3 and Figure 4 The second control module 2 includes a first temperature measuring module 23, the input interface 231 of the first temperature measuring module 23 is used to connect with the first output interface 71 of the double-branch temperature element 7 to detect whether the first temperature signal is normal; the output interface 232 of the first temperature measuring module 23 is connected with the fourth input interface 14 of the first control module 1, so that the first temperature measuring module 23 sends the status signal of the first temperature signal to the first control module 1; the third control module 3 includes a second temperature measuring module 33, the input interface 331 of the second temperature measuring module 33 is used to connect with the second output interface 72 of the double-branch temperature element 7 to detect whether the second temperature signal is normal; the output interface 332 of the second temperature measuring module 33 is connected with the fifth input interface 15 of the first control module 1, so that the second temperature measuring module 33 sends the status signal of the second temperature signal to the first control module 1.

[0051] Here, the first temperature measuring module 23 is independently arranged in the second control module 2, and is used to monitor whether the first temperature signal transmitted by the second control module 2 is normal; the second temperature measuring module 33 is independently arranged in the third control module 3, and is used to monitor whether the second temperature signal transmitted by the third control module 3 is normal. The above arrangement makes the transmitted first temperature signal and second temperature signal more reliable.

[0052] If the first temperature measuring module 23 detects that the first temperature signal is abnormal, it is possible that the first temperature element connected to the first output interface 71 of the double-branch temperature element 7 is damaged, and it is necessary to switch to the second temperature element connected to the second output interface 72 of the double-branch temperature element 7. For this purpose, the first temperature measuring module 23 sends a status signal indicating that the first temperature signal is abnormal to the first control module 1. The implementation method of the second temperature measuring module 33 detecting that the second temperature signal is abnormal is similar to the above case.

[0053] In one embodiment, referring to Figure 2 The fourth output interface 19 of the first control module 1 is used to connect to the second input interface 83 of the distributed control system 8, so that the first control module 1 sends the status signal of the first temperature signal or the status signal of the second temperature signal to the distributed control system 8.

[0054] It should be understood that if the first control module 1 only receives the abnormal state signal of the first temperature signal and sends it to the distributed control system 8, the distributed control system 8 sends a command signal to the first control module 1 to switch from the first temperature element to the second temperature element according to the state signal, and the first control module 1 sends corresponding signals to the second control module 2 and the third control module 3 respectively, the second control module 2 disconnects the connection between the first control module 1 and the first temperature element, and the third control module 3 connects the connection between the first control module 1 and the second temperature element. The implementation method of the first control module 1 only receiving the abnormal state signal of the second temperature signal is similar to the above-mentioned situation. Through the state feedback mechanism of the first temperature signal and the second temperature signal, the real-time monitoring capability can be enhanced and more reliable transmission can be achieved.

[0055] In one embodiment, referring to Figure 3 and Figure 4 The second control module 2 includes a first alarm module 24, and the output interface 232 of the first temperature measurement module 23 is connected to the first alarm module 24; the third control module 3 includes a second alarm module 34, and the output interface 332 of the second temperature measurement module 33 is connected to the second alarm module 34.

[0056] It should be understood that if the first temperature measurement module 23 detects that the first temperature signal is abnormal, the first alarm module 24 is triggered to output an alarm prompt, and if the second temperature measurement module 33 detects that the second temperature signal is abnormal, the second alarm module 34 is triggered to output an alarm prompt.

[0057] Figure 5 : is a wiring diagram showing a connection between a double-branch temperature element switching device and a thermal resistance element 701 according to an exemplary embodiment of the present disclosure. Figure 6 is a wiring diagram showing a connection between a dual-branch temperature element switching device and a thermocouple element 702 according to an exemplary embodiment of the present disclosure, referring to Figure 5 and Figure 6, the first input interface 11 of the first control module 1 includes a first sub-input interface, a second sub-input interface and a third sub-input interface, the second input interface 12 of the first control module 1 includes a fourth sub-input interface, a fifth sub-input interface and a sixth sub-input interface; the dual-branch temperature element 7 is a thermal resistor element 701, the first sub-input interface 111 of the first control module 1 is used to connect with the first sub-output interface 711 of the thermal resistor element 701, the second sub-input interface 112 of the first control module 1 is used to connect with the second sub-output interface 712 of the thermal resistor element 701, the third sub-input interface 113 of the first control module 1 is used to connect with the third sub-output interface 713 of the thermal resistor element 701, the fourth sub-input interface 121 of the first control module 1 is used to connect with the fourth sub-output interface 721 of the thermal resistor element 701, the The fifth sub-input interface 122 of a control module 1 is used to connect to the fifth sub-output interface 722 of the thermal resistor element 701, and the sixth sub-input interface 123 of the first control module 1 is used to connect to the sixth sub-output interface 723 of the thermal resistor element 701; or, the dual-branch temperature element 7 is a thermocouple element 702, the first sub-input interface 111 of the first control module 1 is used to connect to the first sub-output interface 714 of the thermocouple element 702, the second sub-input interface 112 of the first control module 1 is used to connect to the second sub-output interface 715 of the thermocouple element 702, the fourth sub-input interface 121 of the first control module 1 is used to connect to the third sub-output interface 724 of the thermocouple element 702, and the fifth sub-input interface 122 of the first control module 1 is used to connect to the fourth sub-output interface 725 of the thermocouple element 702.

[0058] It should be understood that the device is compatible with two different types of dual-branch temperature elements 7, namely, thermal resistor element 701 and thermocouple element 702. Thermal resistor element 701 generally has six output signal terminals, and the device can perform corresponding wiring and processing according to the six output signals of thermal resistor element 701. Thermocouple element 702 has four output signal terminals, and the device can adopt different wiring methods to adapt to its four output signals.

[0059] In one embodiment, referring to Figure 5 and Figure 6, also includes a mode switching switch 4; when the mode switching switch 4 is switched to the first mode 41, the second control module 2 is connected to the first input interface 11 of the first control module 1 and the first output interface 71 of the double-branch temperature element 7, when the mode switching switch 4 is switched to the second mode 42, the third control module 3 is connected to the second input interface 12 of the first control module 1 and the second output interface of the double-branch temperature element 7, when the mode switching switch 4 is switched to the third mode 43, the first control module 1 controls the second control module 2 to connect the first input interface 11 of the first control module 1 and the first output interface 71 of the double-branch temperature element 7 according to the instruction signal, or controls the third control module 3 to connect the second input interface 12 of the first control module 1 and the second output interface of the double-branch temperature element 7.

[0060] It should be understood that when the mode switching switch 4 is manually switched to the first mode 41 by the staff, it means that the staff only needs the first temperature signal collected by the first temperature element. At this time, the device is connected to the first input interface 11 of the first control module 1 and the first output interface 71 of the double-branch temperature element 7, and the first control module 1 will directly receive the first temperature signal from the double-branch temperature element 7. The implementation method of manually switching the mode switching switch 4 to the second mode 42 by the staff is similar to the above situation.

[0061] When the mode switch 4 is switched to the third mode 43 by the staff, it means that the staff needs the device to automatically switch the dual temperature elements 7 to collect reliable temperature data. The implementation method of this situation has been described in detail in the above embodiment and will not be elaborated here.

[0062] The device provides three switching modes, which can flexibly adapt to the needs of different application scenarios and improve the applicability and operability of the device.

[0063] In one embodiment, referring to Figure 5 and Figure 6 , also includes a first indicator light 51 and a second indicator light 52. When the double-branch temperature switching device transmits the first temperature signal, the first indicator light 51 lights up, and when the double-branch temperature switching device transmits the second temperature signal, the second indicator light 52 lights up.

[0064] It should be understood that the states of the first indicator light 51 and the second indicator light 52 can intuitively reflect whether the current dual-branch temperature switching device is using the first temperature signal or the second temperature signal for transmission. This indication function can help operators better understand the working state of the device and improve the observability and maintainability of the device.

[0065] In one embodiment, referring to Figure 5 and Figure 6 The device also includes: a power interface 6 for connecting a power source; and a power indicator light 61. When the power interface 6 is connected to the power source, the power indicator light 61 lights up.

[0066] Here, the device can be connected to a 220 volt AC power source.

[0067] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0069] In addition, various embodiments of the present disclosure may be arbitrarily combined as long as they do not violate the concept of the present disclosure, and they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A dual-branch temperature element switching device, characterized in that: It comprises a first control module (1), a second control module (2) and a third control module (3); The first input interface (11) of the first control module (1) is used to connect to the first output interface (71) of the dual-branch temperature element (7), so that the first control module (1) receives a first temperature signal sent by the dual-branch temperature element (7); The second input interface (12) of the first control module (1) is used to connect (72) to the second output interface (7) of the dual-branch temperature element (7), so that the first control module (1) receives a second temperature signal sent by the dual-branch temperature element (7); The third input interface (13) of the first control module (1) is used to connect to the first output interface (81) of the distributed control system (8), so that the first control module (1) receives the command signal sent by the distributed control system (8); The first output interface (16) of the first control module (1) is used to connect to the first input interface (82) of the distributed control system (8), so that the first control module (1) sends the first temperature signal or the second temperature signal to the distributed control system (8); The second output interface (17) of the first control module (1) is connected to the first input interface (21) of the second control module (2), the third output interface (18) of the first control module (1) is connected to the first input interface (31) of the third control module (3), the first control module (1) is used to selectively send the command signal to the second control module (2) or the third control module (3), the second control module (2) is used to connect the first input interface (11) of the first control module (1) and the first output interface (71) of the double-branch temperature element (7) according to the command signal, and the third control module (3) is used to connect the second input interface (12) of the first control module (1) and the second output interface of the double-branch temperature element (7) according to the command signal.

2. The dual-branch temperature element switching device according to claim 1, characterized in that: The second control module (2) comprises a first electrical switch (22), wherein the first electrical switch (22) connects the first input interface (11) of the first control module (1) and the first output interface (71) of the dual-branch temperature element (7) according to the command signal; The third control module (3) comprises a second electrical switch (32), wherein the second electrical switch (32) connects the second input interface (12) of the first control module (1) and the second output interface of the dual-branch temperature element (7) according to the command signal.

3. The dual-branch temperature element switching device according to claim 2, characterized in that: The first electrical switch (22) of the second control module (2) is connected to the second electrical switch (32) of the third control module (3) to transmit an interlock signal between the first electrical switch (22) and the second electrical switch (32), so that when the first electrical switch (22) is closed, the second electrical switch (32) is opened, and when the second electrical switch (32) is closed, the first electrical switch (22) is closed and opened.

4. The dual-branch temperature element switching device according to claim 1, characterized in that: The second control module (2) comprises a first temperature measurement module (23), wherein an input interface (231) of the first temperature measurement module (23) is used to connect to a first output interface (71) of the dual-branch temperature element (7) to detect whether the first temperature signal is normal; The output interface (232) of the first temperature measuring module (23) is connected to the fourth input interface (14) of the first control module (1), so that the first temperature measuring module (23) sends a status signal of the first temperature signal to the first control module (1); The third control module (3) comprises a second temperature measurement module (33), wherein an input interface (331) of the second temperature measurement module (33) is used to connect (72) to a second output interface of the dual-branch temperature element (7) to detect whether the second temperature signal is normal; The output interface (332) of the second temperature measuring module (33) is connected to the fifth input interface (15) of the first control module (1), so that the second temperature measuring module (33) sends a status signal of the second temperature signal to the first control module (1).

5. The dual-branch temperature element switching device according to claim 4, characterized in that: The fourth output interface (19) of the first control module (1) is used to connect to the second input interface (83) of the distributed control system (8), so that the first control module (1) sends a status signal of the first temperature signal or a status signal of the second temperature signal to the distributed control system (8).

6. The dual-branch temperature element switching device according to claim 4, characterized in that: The second control module (2) comprises a first alarm module (24), and the output interface (232) of the first temperature measurement module (23) is connected to the first alarm module (24); The third control module (3) comprises a second alarm module (34), and the output interface (332) of the second temperature measurement module (33) is connected to the second alarm module (34).

7. The double-branch temperature element switching device according to any one of claims 1 to 6, characterized in that: The first input interface (11) of the first control module (1) comprises a first sub-input interface, a second sub-input interface and a third sub-input interface, and the second input interface (12) of the first control module (1) comprises a fourth sub-input interface, a fifth sub-input interface and a sixth sub-input interface; The dual-branch temperature element (7) is a thermal resistor element (701); the first sub-input interface (111) of the first control module (1) is used to connect to the first sub-output interface (711) of the thermal resistor element (701); the second sub-input interface (112) of the first control module (1) is used to connect to the second sub-output interface (712) of the thermal resistor element (701); and the third sub-input interface (113) of the first control module (1) is used to connect to the third sub-output interface (713) of the thermal resistor element (701). The first control module (1) is connected to the thermal resistance element (701) by a fourth sub-input interface (121), the first control module (1) is connected to the fourth sub-output interface (721), the first control module (1) is connected to the fifth sub-output interface (722), and the first control module (1) is connected to the sixth sub-output interface (723); or, The dual-branch temperature element (7) is a thermocouple element (702); the first sub-input interface (111) of the first control module (1) is used to connect to the first sub-output interface (714) of the thermocouple element (702); the second sub-input interface (112) of the first control module (1) is used to connect to the second sub-output interface (715) of the thermocouple element (702); the fourth sub-input interface (121) of the first control module (1) is used to connect to the third sub-output interface (724) of the thermocouple element (702); and the fifth sub-input interface (122) of the first control module (1) is used to connect to the fourth sub-output interface (725) of the thermocouple element (702).

8. The dual-branch temperature element switching device according to any one of claims 1 to 6, characterized in that: Also includes a mode switching switch (4); When the mode switching switch (4) is switched to the first mode (41), the second control module (2) is connected to the first input interface (11) of the first control module (1) and the first output interface (71) of the dual-branch temperature element (7). When the mode switching switch (4) is switched to the second mode (42), the third control module (3) is connected to the second input interface (12) of the first control module (1) and the second output interface of the dual-branch temperature element (7). When the mode switching switch (4) is switched to the third mode (43), the first control module (1) controls the second control module (2) according to the command signal to connect the first input interface (11) of the first control module (1) and the first output interface (71) of the double-branch temperature element (7), or controls the third control module (3) to connect the second input interface (12) of the first control module (1) and the second output interface of the double-branch temperature element (7).

9. The dual-branch temperature element switching device according to any one of claims 1 to 6, characterized in that: It also includes a first indicator light (51) and a second indicator light (52). When the double-branch temperature element switching device transmits the first temperature signal, the first indicator light (51) lights up, and when the double-branch temperature element switching device transmits the second temperature signal, the second indicator light (52) lights up.

10. The double-branch temperature element switching device according to any one of claims 1 to 6, characterized in that: Also includes: A power interface (6), used for connecting to a power source; A power indicator light (61), when the power interface (6) is connected to the power supply, the power indicator light (61) lights up.

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