CN220581108U - LVDT mounting panel temperature display device - Google Patents
LVDT mounting panel temperature display device Download PDFInfo
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- CN220581108U CN220581108U CN202322411959.1U CN202322411959U CN220581108U CN 220581108 U CN220581108 U CN 220581108U CN 202322411959 U CN202322411959 U CN 202322411959U CN 220581108 U CN220581108 U CN 220581108U
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- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Abstract
The utility model provides a temperature display device of an LVDT mounting panel, which relates to the technical field of equipment detection, and comprises: the LVDT is provided with a backboard, a temperature measuring element and a display module, wherein the temperature measuring element is connected with the display module through a lead; an LVDT mounting back plate for mounting a temperature measuring element; the temperature measuring element is used for acquiring temperature data of the steam turbine valve LVDT element to obtain temperature analog data; the display module is used for converting the temperature analog quantity data into temperature digital quantity data and displaying the temperature digital quantity data, so that the technical problem that the steam turbine valve LVDT element is difficult to carry out rapid and safe temperature detection is solved.
Description
Technical Field
The utility model relates to the technical field of equipment detection, in particular to a temperature display device of an LVDT mounting panel.
Background
The steam turbine DEH system is provided with 2 high-pressure main valves, 4 high-pressure regulating valves and 4 medium-pressure regulating valves, and is responsible for a unit speed regulating system to influence unit safety. Each valve is provided with 2 sets of feedback LVDT devices, the LVDT devices are arranged on an iron plate of a valve side door, an LVDT movable rod is connected with a valve connecting rod, when the valve acts and the opening changes, the LVDT movable rod is driven to act, the induced voltage of an internal coil of the LVDT changes, the voltage change is converted into an electric signal to be transmitted to the DCS, and the electric signal is used as an opening display to achieve the effect of measuring the opening of the valve. However, when the turbine runs, a large amount of hot gas is blown out from the valve core of the valve, the feedback LVDT is just installed on the valve, and a large amount of hot gas is blown directly for a long time, so that the temperature of the LVDT is high and is up to 150 ℃ at most, and the temperature exceeds the temperature of the LVDT by 125 ℃, so that LVDT elements are damaged, the valve of the turbine is misoperation, and the stable running of the turbine is seriously affected. The LVDT element has no temperature monitoring means, and the temperature degradation trend of the LVDT feedback element cannot be found in time, so that the LVDT is protected in time.
Along with the continuous increase of the service life of the steam turbine valve, the risk of abnormal rise exists in the temperature around the valve, the reliability of the valve feedback LVDT signal is reduced increasingly obviously, the stable operation of the unit is seriously affected, a certain risk is provided, currently, only inspection personnel can be relied on to regularly measure the temperature of the valve LVDT element, and the temperature condition is recorded. Because the on-site temperature is high, the LVDT is positioned at the top of the high-pressure cylinder of the steam turbine, and the method has certain danger, and more important equipment around the steam turbine is easy to malfunction, so the method has great safety risks for personnel safety and equipment safety.
Disclosure of Invention
In view of the above, the present utility model aims to provide a temperature display device for an LVDT mounting panel, so as to alleviate the technical problem that it is difficult to perform quick and safe temperature detection on a steam turbine valve LVDT element.
In a first aspect, an embodiment of the present utility model provides an LVDT mounting panel temperature display device, including: the LVDT comprises an LVDT mounting backboard, a temperature measuring element and a display module, wherein the temperature measuring element is connected with the display module through a lead; the LVDT mounting backboard is used for mounting the temperature measuring element; the temperature measuring element is used for acquiring temperature data of the steam turbine valve LVDT element to obtain temperature analog data; the display module is used for converting the temperature analog quantity data into temperature digital quantity data and displaying the temperature digital quantity data.
Further, the temperature measuring element includes: and the PT100 end face thermal resistance element is connected with the lead and the connector respectively, and the connector is connected with the display module.
Further, the dimension of the PT100 end face thermal resistance element is phi 8mm x 18mm; the length of the lead is 5 meters; the number of the joints is 3.
Further, the display module includes: the differential amplifier is connected with the third resistor group and the A/D converter respectively.
Further, the first resistor group is connected with the PT100 end face thermal resistor element through the connector and the lead, the first resistor group comprises a first sub resistor, a second sub resistor and a third sub resistor, the first sub resistor and the second sub resistor are connected with the third resistor group, and the third sub resistor is grounded.
Further, the second resistor group and the PT100 end surface thermal resistor element form a bridge circuit, and the second resistor group includes: the fourth sub-resistor, the fifth sub-resistor and the sixth sub-resistor are respectively connected with the first sub-resistor and the third resistor group, and the sixth sub-resistor is respectively connected with the fifth sub-resistor and the third resistor group.
Further, the third resistor group includes: the differential amplifier comprises a seventh sub resistor, an eighth sub resistor, a ninth sub resistor and a tenth sub resistor, wherein the seventh sub resistor is respectively connected with the fourth sub resistor and the positive electrode of the input end of the differential amplifier, the eighth sub resistor is respectively connected with the sixth sub resistor and the negative electrode of the input end of the differential amplifier, the ninth sub resistor is connected with the seventh sub resistor, the ninth sub resistor is grounded, and the tenth sub resistor is respectively connected with the eighth sub resistor and the output end of the differential amplifier.
The temperature display device of the LVDT mounting panel provided by the embodiment of the utility model comprises: the LVDT comprises an LVDT mounting backboard, a temperature measuring element and a display module, wherein the temperature measuring element is connected with the display module through a lead; the LVDT mounting backboard is used for mounting the temperature measuring element; the temperature measuring element is used for acquiring temperature data of the steam turbine valve LVDT element to obtain temperature analog data; the display module is used for converting the temperature analog quantity data into temperature digital quantity data and displaying the temperature digital quantity data. According to the utility model, the temperature measuring element PT100 is arranged on the back plate of the steam turbine LVDT, and the display module is led to the area with low temperature and safe position through the temperature lead, so that the technical problem that the steam turbine valve LVDT is difficult to detect the temperature rapidly and safely is solved, and the technical effect of convenient and safe detection environment is provided for staff.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an LVDT mounting panel temperature display device according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a temperature measurement element according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a display module according to an embodiment of the utility model;
fig. 4 is a circuit diagram of a display module according to an embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
according to an embodiment of the present utility model, an embodiment of an LVDT mounting panel temperature display device is provided. Embodiments of the present utility model will be described in detail with reference to fig. 1 to 4.
FIG. 1 is a schematic view of an LVDT mounting faceplate temperature display device according to an embodiment of the present utility model, as shown in FIG. 1, with a back plate, a temperature measurement element and a display module, wherein the temperature measurement element is connected to the display module by leads;
the LVDT mounting back plate 10 is used for mounting the temperature measuring element;
the temperature measuring element 20 is used for acquiring temperature data of the valve LVDT element of the steam turbine to obtain temperature analog data;
the display module 30 is configured to convert the temperature analog quantity data into temperature digital quantity data and display the temperature digital quantity data.
The temperature display device of the LVDT mounting panel provided by the embodiment of the utility model comprises: the LVDT comprises an LVDT mounting backboard, a temperature measuring element and a display module, wherein the temperature measuring element is connected with the display module through a lead; the LVDT mounting backboard is used for mounting the temperature measuring element; the temperature measuring element is used for acquiring temperature data of the steam turbine valve LVDT element to obtain temperature analog data; the display module is used for converting the temperature analog quantity data into temperature digital quantity data and displaying the temperature digital quantity data. According to the utility model, the temperature measuring element PT100 is arranged on the back plate of the steam turbine LVDT, and the display module is led to the area with low temperature and safe position through the temperature lead, so that the technical problem that the steam turbine valve LVDT is difficult to detect the temperature rapidly and safely is solved, and the technical effect of convenient and safe detection environment is provided for staff.
As shown in fig. 2, the temperature measuring element 20 includes: the PT100 end face thermal resistance element 21, the lead 22 and the connector 23, wherein the lead is respectively connected with the PT100 end face thermal resistance element and the connector, and the connector is connected with the display module.
In the embodiment of the utility model, a PT100 end face thermal resistance element is arranged on an LVDT installation backboard, the size is phi 8mm or 18mm, the PT100 end face thermal resistance element is made of a three-wire system, and a lead wire is made of 5 meters, so that the temperature display device can be conveniently installed at a safe position. Three connectors of the PT100 end face thermal resistance element are respectively connected to a, b and c wiring terminals on the display module.
As shown in fig. 3, the display module includes: first resistor group 31, second resistor group 32, third resistor group 33, differential amplifier U 1 And an a/D converter 34, whichThe first resistor group is connected with the connector and the second resistor group respectively, the second resistor group is connected with the third resistor group, and the differential amplifier is connected with the third resistor group and the A/D converter respectively.
As shown in FIG. 4, the first resistor group is connected with the PT100 end face thermal resistor element R through the connector and the lead t Is connected with the first resistor group and comprises a first sub resistor r 1 Second sub-resistor r 2 And a third sub-resistor r 3 The first sub-resistor and the second sub-resistor are connected with the third resistor group, and the third sub-resistor is grounded.
The second resistor group and the PT100 end face thermal resistor element form a bridge circuit, and the second resistor group comprises: fourth sub-resistor R 1 Fifth sub-resistor R 2 And a sixth sub-resistor R p The fourth sub resistor is connected with the first sub resistor and the third resistor group respectively, and the sixth sub resistor is connected with the fifth sub resistor and the third resistor group respectively.
The third resistor group includes: seventh sub-resistor R 3 Eighth sub-resistor R 4 Ninth resistor R 5 And a tenth sub-resistor R 6 The seventh sub-resistor is respectively connected with the fourth sub-resistor and the positive electrode of the input end of the differential amplifier, the eighth sub-resistor is respectively connected with the sixth sub-resistor and the negative electrode of the input end of the differential amplifier, the ninth sub-resistor is connected with the seventh sub-resistor, the ninth sub-resistor is grounded, and the tenth sub-resistor is respectively connected with the eighth sub-resistor and the output end of the differential amplifier.
In the present utility model, R in the figure t Is PT100 end face thermal resistance element, wherein R 1 、R 2 、R p Thermal resistor R t Form a bridge circuit due to R 1 ＝R 2 ，r 1 ＝r 2 Thermal resistor R at 0 DEG C t The resistance value of (2) is 100 omega, R is adjusted p The resistance value of (2) is 100deg.OMEGA, R 1 +r 1 +R t ＝R 2 +R p +R 2 The bridge is in an equilibrium state, the output signal is 0, the output of the differential amplifier U1 is 0V, and the temperature is converted into 0 ℃ through the A/D converter. R when the ambient temperature changes t The resistance increases, the bridge output signal increases, and at the same time the amplifier U1 voltage increases, the temperature value displayed also increases, and when the temperature decreases, the resistance and voltage values are vice versa.
According to the technology, the steam turbine valve LVDT mounting backboard is modified, the on-site temperature display device is additionally arranged, the valve feedback LVDT mounting backboard temperature is displayed in real time, so that a worker can check the temperature every day to form a temperature history trend, the degradation trend analysis is carried out, the temperature abnormality of an LVDT element is timely found, and measures are timely taken.
The temperature measuring element PT100 is arranged on the LVDT backboard of the steam turbine, the temperature display meter is led to the area with low temperature and safe position through the temperature lead, the temperature measuring device has the function of on-site display, the function of remote transmission of 4-20mA signals, the temperature measuring device can be transmitted to a DCS system, and the temperature measuring device can be monitored on a remote POC station.
In summary, the embodiment of the utility model can intuitively know the temperature condition of the feedback LVDT device in a valve area which is not close to high temperature when in on-site inspection, achieves the effects of rapidness and safety, avoids misoperation of important protection equipment of the steam turbine when measuring the temperature, ensures the stable and safe operation of the steam turbine, and ensures the personal safety.
In addition, in the description of embodiments of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model, but it should be understood by those skilled in the art that the present utility model is not limited thereto, and that the present utility model is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (7)
1. An LVDT mounting panel temperature display device, comprising: the LVDT comprises an LVDT mounting backboard, a temperature measuring element and a display module, wherein the temperature measuring element is connected with the display module through a lead;
the LVDT mounting backboard is used for mounting the temperature measuring element;
the temperature measuring element is used for acquiring temperature data of the steam turbine valve LVDT element to obtain temperature analog data;
the display module is used for converting the temperature analog quantity data into temperature digital quantity data and displaying the temperature digital quantity data.
2. The LVDT mounting panel temperature display device of claim 1, wherein the temperature measurement element comprises: and the PT100 end face thermal resistance element is connected with the lead and the connector respectively, and the connector is connected with the display module.
3. The LVDT mounting panel temperature display device of claim 2, wherein,
the dimension of the PT100 end face thermal resistance element is phi 8mm or 18mm;
the length of the lead is 5 meters;
the number of the joints is 3.
4. The LVDT mounting panel temperature display device of claim 3, wherein the display module comprises: the differential amplifier is connected with the third resistor group and the A/D converter respectively.
5. The LVDT mounting panel temperature display device of claim 4, wherein the first resistor string is connected to the PT100 end surface thermal resistor element by the connector and the lead, the first resistor string includes a first sub-resistor, a second sub-resistor, and a third sub-resistor, wherein the first sub-resistor and the second sub-resistor are connected to the third resistor string, and the third sub-resistor is grounded.
6. The LVDT mounting panel temperature display device of claim 5, wherein the second resistor group and the PT100 end surface thermal resistor element form a bridge circuit, the second resistor group comprising: the fourth sub-resistor, the fifth sub-resistor and the sixth sub-resistor are respectively connected with the first sub-resistor and the third resistor group, and the sixth sub-resistor is respectively connected with the fifth sub-resistor and the third resistor group.
7. The LVDT mounting panel temperature display device of claim 6, wherein the third resistor group comprises: the differential amplifier comprises a seventh sub resistor, an eighth sub resistor, a ninth sub resistor and a tenth sub resistor, wherein the seventh sub resistor is respectively connected with the fourth sub resistor and the positive electrode of the input end of the differential amplifier, the eighth sub resistor is respectively connected with the sixth sub resistor and the negative electrode of the input end of the differential amplifier, the ninth sub resistor is connected with the seventh sub resistor, the ninth sub resistor is grounded, and the tenth sub resistor is respectively connected with the eighth sub resistor and the output end of the differential amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322411959.1U CN220581108U (en) | 2023-09-05 | 2023-09-05 | LVDT mounting panel temperature display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322411959.1U CN220581108U (en) | 2023-09-05 | 2023-09-05 | LVDT mounting panel temperature display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581108U true CN220581108U (en) | 2024-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322411959.1U Active CN220581108U (en) | 2023-09-05 | 2023-09-05 | LVDT mounting panel temperature display device |
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| Country | Link |
|---|---|
| CN (1) | CN220581108U (en) |
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2023
- 2023-09-05 CN CN202322411959.1U patent/CN220581108U/en active Active
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