CN217304184U - Temperature measuring device and equipment monitoring system - Google Patents
Temperature measuring device and equipment monitoring system Download PDFInfo
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- CN217304184U CN217304184U CN202221309754.1U CN202221309754U CN217304184U CN 217304184 U CN217304184 U CN 217304184U CN 202221309754 U CN202221309754 U CN 202221309754U CN 217304184 U CN217304184 U CN 217304184U
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- thermocouple
- electromagnetic relay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model provides a temperature measuring device and an equipment monitoring system, which relate to the technical field of electronic circuits, wherein the temperature measuring device comprises a main thermocouple, a standby thermocouple, an electromagnetic relay and a control system; the main thermocouple is connected with the normally closed contact of the electromagnetic relay, the standby thermocouple is connected with the normally open contact of the electromagnetic relay, and the common end of the electromagnetic relay is connected with the input channel of the control system, so that the main thermocouple or the standby thermocouple, the electromagnetic relay and the input channel form a thermocouple measuring loop; the power supply end of the electromagnetic relay is connected with the output channel of the control system; when the output channel is connected, the coil of the electromagnetic relay is electrified, and the thermocouple measuring loop is switched from the main temperature measuring loop corresponding to the main thermocouple to the standby temperature measuring loop corresponding to the standby thermocouple. Therefore, when the main thermocouple is abnormal, the main thermocouple can be automatically switched to the standby thermocouple, the reliability of the temperature measuring device is improved, and the influence of thermocouple faults on production safety is reduced.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit technique and specifically relates to a temperature measuring device and equipment monitored control system are related to.
Background
At present, thermocouples used in the existing production place are provided with 2 groups of measuring points, one for use and one for standby, and as shown in fig. 1, two groups of measuring points are a first group of measuring points 101 and a second group of measuring points 102; one group (the first group of measuring points 101) is directly connected to the upper computer 103 through a compensating lead, and the other group is not connected with a wire. In the prior art, when the thermocouple fails to cause temperature measurement mismatching of the current assembly point, the current assembly point can only be removed, and then an operator needs to contact a thermal control maintenance worker for processing, so that the time required for fault recovery is long, and the production safety is affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a temperature measurement device and equipment monitored control system to improve temperature measurement device's reliability, thereby reduce the influence of thermocouple trouble to production safety.
In a first aspect, an embodiment of the present invention provides a temperature measuring device, including a main thermocouple, a standby thermocouple, an electromagnetic relay, and a control system; the main thermocouple is connected with the normally closed contact of the electromagnetic relay, the standby thermocouple is connected with the normally open contact of the electromagnetic relay, and the common end of the electromagnetic relay is connected with the input channel of the control system, so that the main thermocouple or the standby thermocouple, the electromagnetic relay and the input channel form a thermocouple measuring loop; the power supply end of the electromagnetic relay is connected with the output channel of the control system; when the output channel is connected, the coil of the electromagnetic relay is electrified, and the thermocouple measuring loop is switched from the main temperature measuring loop corresponding to the main thermocouple to the standby temperature measuring loop corresponding to the standby thermocouple.
Furthermore, the coil of the electromagnetic relay is connected with the output channel and the relay power supply in series to form a control loop.
Further, the relay power supply includes a 24V power supply.
Further, the control system includes a distributed control system DCS.
Further, the control system is used for controlling the output channel to be connected when the switching instruction is acquired.
Further, the switching instruction comprises a first instruction generated based on the thermocouple fault detection result or a second instruction from a user.
Furthermore, the control system is also used for giving an alarm when the thermocouple measuring loop is switched from the main temperature measuring loop to the standby temperature measuring loop.
Furthermore, the temperature measuring device also comprises an audible and visual alarm connected with the control system, and the audible and visual alarm is used for giving an audible and visual alarm when receiving an alarm instruction sent by the control system.
Further, the control system is also used for sending alarm information, and the alarm information comprises temperature measurement data before and after the thermocouple measurement loop is switched.
In a second aspect, an embodiment of the present invention further provides an apparatus monitoring system, including the temperature measuring device of the first aspect.
In the temperature measuring device and the equipment monitoring system provided by the embodiment of the utility model, the temperature measuring device comprises a main thermocouple, a standby thermocouple, an electromagnetic relay and a control system; the main thermocouple is connected with the normally closed contact of the electromagnetic relay, the standby thermocouple is connected with the normally open contact of the electromagnetic relay, and the common end of the electromagnetic relay is connected with the input channel of the control system, so that the main thermocouple or the standby thermocouple, the electromagnetic relay and the input channel form a thermocouple measuring loop; the power supply end of the electromagnetic relay is connected with the output channel of the control system; when the output channel is connected, the coil of the electromagnetic relay is electrified, and the thermocouple measuring loop is switched from the main temperature measuring loop corresponding to the main thermocouple to the standby temperature measuring loop corresponding to the standby thermocouple. Therefore, when the main thermocouple is abnormal, the main thermocouple can be automatically switched to the standby thermocouple, the reliability of the temperature measuring device is greatly improved, and the influence of thermocouple faults on production safety is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art thermocouple measurement circuit;
fig. 2 is a schematic diagram of a temperature measuring device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a thermocouple measurement loop in a temperature measurement device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a control loop in a temperature measuring device according to an embodiment of the present invention.
Icon: 101-a first set of stations; 102-a second set of stations; 103-an upper computer; 210-a main thermocouple; 220-spare thermocouple; 230-an electromagnetic relay; 231-a normally closed contact; 232-normally open contact; 233-coils; 241-an input channel; 242-output channel; 250-relay power supply.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Although the existing temperature measuring device can avoid abnormal system control caused by inaccurate temperature measurement when a thermocouple fails by means of setting temperature change rate detection, disconnection alarm and the like in logic, once the thermocouple is damaged, the current measuring point can be removed, and the current measuring point cannot be automatically switched to a standby measuring point. When a thermocouple in the temperature measuring device breaks down, an operator can only contact a thermal control maintenance worker to process the fault, the time required by fault recovery is long, and in a special condition (for example, the faults of a plurality of groups of measuring points simultaneously) the monitoring is easy to lose, so that the safety production is influenced. Based on this, the embodiment of the utility model provides a temperature measuring device and equipment monitoring system spreads into electromagnetic relay in the thermocouple measurement return circuit, inserts electromagnetic relay's normally closed contact, normally open contact respectively with two sets of measurement stations (two sets of measurement stations correspond main thermocouple and reserve thermocouple respectively) of thermocouple, when main thermocouple appears unusually, can automatic switch over to reserve thermocouple, consequently improved temperature measuring device's reliability, reduced the influence of thermocouple trouble to production safety.
To facilitate understanding of the present embodiment, a temperature measuring device disclosed in the embodiments of the present invention will be described in detail first.
As shown in fig. 2 to 4, an embodiment of the present invention provides a temperature measuring device, which includes a main thermocouple 210, a standby thermocouple 220, an electromagnetic relay 230, and a control system; the main thermocouple 210 is connected with a normally closed contact 231 of the electromagnetic relay 230, the standby thermocouple 220 is connected with a normally open contact 232 of the electromagnetic relay 230, and a common end of the electromagnetic relay 230 is connected with an input channel 241 of a control system, so that the main thermocouple 210 or the standby thermocouple 220, the electromagnetic relay 230 and the input channel 241 of the control system form a thermocouple measurement loop; the power supply terminal of the electromagnetic relay 230 is connected to the output channel 242 of the control system.
When the coil 233 of the electromagnetic relay 230 is not energized, the normally closed contact 231 is in a closed state, and the normally open contact 232 is in an open state, at this time, the main thermocouple 210, the electromagnetic relay 230, and the input channel 241 of the control system form a main temperature measuring loop.
When the coil 233 of the electromagnetic relay 230 is energized, the normally closed contact 231 is in an open state, and the normally open contact 232 is in a closed state, at this time, the standby thermocouple 220, the electromagnetic relay 230 and the input channel 241 of the control system form a standby temperature measuring circuit.
When the output channel 242 of the control system is connected, the coil 233 of the electromagnetic relay 230 is energized, and the thermocouple measurement circuit is switched from the main temperature measurement circuit corresponding to the main thermocouple 210 to the standby temperature measurement circuit corresponding to the standby thermocouple 220.
Preferably, the main thermocouple 210 is connected to the normally closed contact 231 of the electromagnetic relay 230 through a compensation wire, and the backup thermocouple 220 is also connected to the normally open contact 232 of the electromagnetic relay 230 through a compensation wire.
As shown in fig. 4, the coil 233 of the electromagnetic relay 230 is connected in series with the output channel 242 of the control system and the relay power supply 250 to form a control loop.
Alternatively, the relay power supply 250 may employ a 24V power supply.
Alternatively, the control system may be a Distributed Control System (DCS).
In one possible implementation, the coil 233 of the electromagnetic relay 230 is connected in series with the 24V power supply, DCS output channel 242.
Optionally, the control system is configured to control the output channel 242 to be turned on when the switching instruction is acquired. Further, the switching command may be a first command generated based on the thermocouple fault detection result, or may be a second command from a user.
For example, the control system may perform thermocouple fault detection by setting temperature change rate detection and/or disconnection alarm, and when the thermocouple fault detection result indicates that a current thermocouple in the thermocouple measurement loop has a fault, the control system may generate a first instruction to control the output channel 242 to be connected.
As another example, the operator may issue a second command via the control system, such that the control system controls the output channel 242 to be turned on.
Optionally, the control system is further configured to alarm when the thermocouple measurement loop is switched from the main temperature measurement loop to the standby temperature measurement loop.
In a possible implementation manner, the temperature measuring device further comprises an audible and visual alarm connected with the control system, and the audible and visual alarm is used for giving an audible and visual alarm when receiving an alarm instruction sent by the control system. The audible and visual alarm may be located at a position where a relevant person is located, for example, the audible and visual alarm may be located in a monitoring room (such as a monitoring room of a power plant) where an operator is located, and the audible and visual alarm may also be located at a place where a device to be tested is located.
In another possible implementation manner, the control system is further configured to send an alarm message, where the alarm message may include information of the switched thermocouple and temperature measurement data before and after switching of the thermocouple measurement loop. Alarm information can show such as on the display screen in the monitor, and the maintainer can look over the temperature measurement trend before the return circuit switches, after, judges in advance whether need change whole group's thermocouple to fault handling efficiency has greatly been promoted.
In addition, the operator can also switch the thermocouple measurement loop manually at regular intervals, judge whether the measured values measured by the main thermocouple 210 and the standby thermocouple 220 have deviation, indicate that the group of thermocouples are abnormal when the deviation exists, and can inform the maintainer of processing in time.
To sum up, the embodiment of the utility model provides a temperature measuring device has following advantage:
1. when the main thermocouple 210 is abnormal, the standby thermocouple 220 can be automatically switched to; the reliability of the temperature measuring device is greatly improved.
2. The operator can switch the thermocouple measurement loop manually at regular intervals, and when the measured values measured by the main thermocouple 210 and the standby thermocouple 220 are found to have deviation, the operator can be informed to handle the thermocouple in time.
3. The maintainer can judge whether to change the whole group of thermocouples in advance by checking the temperature measurement trends before and after the circuit is switched (without opening the cover on site, measuring the temperature of the standby measuring point and judging as before), thereby greatly improving the fault treatment efficiency.
The embodiment of the utility model provides a still provide an equipment monitoring system, this equipment monitoring system includes foretell temperature measuring device. The equipment monitoring system can also comprise other detection devices, such as a humidity sensor, a voltage and current detector and the like.
The principle and the technical effects of the apparatus monitoring system provided by the present embodiment are the same as those of the foregoing embodiment of the temperature measuring device, and for a brief description, reference may be made to the corresponding contents in the foregoing embodiment of the temperature measuring device where no part of the embodiment of the apparatus monitoring system is mentioned.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (10)
1. A temperature measuring device is characterized by comprising a main thermocouple, a standby thermocouple, an electromagnetic relay and a control system;
the main thermocouple is connected with the normally closed contact of the electromagnetic relay, the standby thermocouple is connected with the normally open contact of the electromagnetic relay, and the common end of the electromagnetic relay is connected with the input channel of the control system, so that the main thermocouple or the standby thermocouple, the electromagnetic relay and the input channel form a thermocouple measuring loop; the power end of the electromagnetic relay is connected with the output channel of the control system;
when the output channel is connected, the coil of the electromagnetic relay is electrified, and the thermocouple measuring loop is switched from the main temperature measuring loop corresponding to the main thermocouple to the standby temperature measuring loop corresponding to the standby thermocouple.
2. The temperature measuring device of claim 1, wherein the coil of the electromagnetic relay is connected in series with the output channel and a relay power supply to form a control loop.
3. The temperature measurement device of claim 2, wherein the relay power supply comprises a 24V power supply.
4. The temperature measurement device of claim 1, wherein the control system comprises a Distributed Control System (DCS).
5. The temperature measuring device according to claim 1, wherein the control system is configured to control the output channel to be turned on when a switching instruction is acquired.
6. The temperature measurement device of claim 5, wherein the switching instructions comprise a first instruction generated based on thermocouple fault detection or a second instruction from a user.
7. The temperature measurement device of claim 1, wherein the control system is further configured to alarm when the thermocouple measurement loop is switched from the primary thermometry loop to the backup thermometry loop.
8. The temperature measuring device of claim 7, further comprising an audible and visual alarm connected to the control system, wherein the audible and visual alarm is configured to alarm when receiving an alarm command from the control system.
9. The temperature measurement device of claim 7, wherein the control system is further configured to send an alarm message that includes temperature measurement data before and after switching of the thermocouple measurement loop.
10. An equipment monitoring system comprising a temperature measuring device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221309754.1U CN217304184U (en) | 2022-05-26 | 2022-05-26 | Temperature measuring device and equipment monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221309754.1U CN217304184U (en) | 2022-05-26 | 2022-05-26 | Temperature measuring device and equipment monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN217304184U true CN217304184U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221309754.1U Active CN217304184U (en) | 2022-05-26 | 2022-05-26 | Temperature measuring device and equipment monitoring system |
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| Country | Link |
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| CN (1) | CN217304184U (en) |
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- 2022-05-26 CN CN202221309754.1U patent/CN217304184U/en active Active
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