CN112692245B - Temperature measuring device of vacuum precision casting furnace - Google Patents
Temperature measuring device of vacuum precision casting furnace Download PDFInfo
- Publication number
- CN112692245B CN112692245B CN202110316448.4A CN202110316448A CN112692245B CN 112692245 B CN112692245 B CN 112692245B CN 202110316448 A CN202110316448 A CN 202110316448A CN 112692245 B CN112692245 B CN 112692245B
- Authority
- CN
- China
- Prior art keywords
- temperature
- temperature measuring
- component
- cavity
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/20—Arrangement of controlling, monitoring, alarm or like devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0014—Devices for monitoring temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/13—Smelting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention discloses a temperature measuring device of a vacuum precision casting furnace, which comprises: the first temperature measurement assembly comprises an upper cavity, a line concentration cavity, a transmission cavity and a lower cavity which are sequentially arranged from top to bottom and fixedly connected in a sealing manner; the power source, the sensor and the controller are fixed on a support beside the transmission cavity, the sensor detects the output of the power source and feeds back the output to the controller, the controller controls the output of the power source according to the signal of the sensor, the power source is connected with a driving shaft through a coupler, the driving shaft is connected with a transmission gear in the transmission cavity in a key mode, the transmission gear is meshed with a main shaft to drive the main shaft to reciprocate up and down, a main shaft supporting frame is fixed in the transmission cavity, and a first; the second temperature measurement component comprises a second thermometer and a closed hollow mounting bracket; a preset included angle is formed between the first temperature measurement component and the second temperature measurement component, and the lower cavity and the closed hollow mounting bracket are fixed on the vacuum precision casting furnace wall.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a temperature measuring device of a vacuum precision casting furnace.
Background
A vacuum precision casting furnace is a process test instrument used in the technical fields of material science and metallurgical engineering. The vacuum precision casting furnace is designed by adopting a vertical two-chamber or vertical three-chamber, smelting and casting are carried out in a vacuum atmosphere, and the equipment can realize equiaxial, directional and continuous pouring of single crystal castings. Under the vacuum condition, a precision casting furnace utilizes a medium-frequency induction heating principle, uses a high-temperature master alloy ingot to melt alloys with higher active metal content, such as nickel, titanium, aluminum and the like, in vacuum, and precisely measures the temperature of molten steel after melting through a temperature measuring device, and then quickly and precisely pours the molten steel into a ceramic casting mold prepared by a dewaxing method for cooling and forming. Therefore, the casting does not need to be welded and machined, and is mainly applied to the blades of the aerospace engine. In the past, the high-temperature master alloy ingot is vacuum-smelted in a precision casting furnace, and the alloy with high content of active metals such as nickel, titanium and aluminum cannot be directly poured at a precise test temperature, so that the production efficiency is affected due to long temperature measurement time and low pouring forming rate.
Disclosure of Invention
In this summary, a series of simplified form concepts are introduced that are simplifications of the prior art in this field, which will be described in further detail in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention aims to provide a temperature measuring device capable of accurately measuring the real-time temperature of a casting material in a vacuum precision casting furnace.
In order to solve the technical problem, the invention provides a temperature measuring device of a vacuum precision casting furnace, which comprises: the first temperature measuring component and the second temperature measuring component;
a first thermometric assembly comprising: the upper cavity, the line concentration cavity, the transmission cavity and the lower cavity are sequentially arranged from top to bottom and are fixedly connected in a sealing manner;
the power source, the sensor and the controller are fixed on a support beside the transmission cavity, the sensor detects the output of the power source and feeds back the output to the controller, the controller controls the output of the power source according to the signal of the sensor, the power source is connected with a driving shaft through a coupler, the driving shaft is connected with a transmission gear in the transmission cavity in a key mode, the transmission gear is meshed with a main shaft to drive the main shaft to reciprocate up and down, a main shaft supporting frame is fixed in the transmission cavity, and a first;
the second temperature measurement subassembly includes: the second temperature detector is arranged at one end of the sealed hollow mounting bracket, which is far away from the vacuum precision casting furnace wall;
a preset included angle is formed between the first temperature measuring component and the second temperature measuring component, and the lower cavity and the closed hollow mounting bracket are fixed on the vacuum precision casting furnace wall.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the controller also controls the output of the power source according to the temperature measured by the first temperature measuring component and executes repeated temperature measurement;
or the controller also controls the output of the power source according to the temperature measured by the first temperature measuring component and the temperature measured by the second temperature measuring component, and executes repeated temperature measurement.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, wherein the first temperature detector is a thermocouple temperature measuring rod;
the bottom end of the main shaft is fixed with a thermocouple temperature measuring rod, the concentrator is fixed on the inner wall of the line concentration cavity, and a thermocouple compensation line enters a thermocouple compensation terminal connected with the thermocouple temperature measuring rod from a line inlet of the line concentration cavity.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the temperature measuring device further comprises:
the guide rod roller is fixed in the upper cavity, is fixedly connected with the main shaft and is used for guiding the main shaft.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the second temperature detector is an optical temperature detector.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, the sensor is an absolute value encoder, and the controller is a PLC or an MCU.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measuring component and the temperature measured by the second temperature measuring component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
if the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measurement assembly and the second temperature measurement assembly to measure the temperatures simultaneously or successively within a first time period after the preset time delay, and if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the controller outputs a temperature measurement assembly fault alarm.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the temperature measuring device further comprises:
if the difference of the measured temperature is still larger than or equal to the temperature difference threshold value, the controller judges whether the first temperature measuring assembly fails according to the detection signal of the sensor and the output signal of the sensor, if the first temperature measuring assembly fails, a failure alarm of the first temperature measuring assembly is sent, and the temperature measured by the second temperature measuring assembly is used as the temperature measured by the vacuum precision casting furnace for production control.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measuring component and the temperature measured by the second temperature measuring component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
if the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is smaller than the temperature difference threshold value, and the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly are both higher than the high temperature threshold value or both lower than the low temperature threshold value, the controller controls the first temperature measurement assembly to perform temperature measurement again after preset time delay;
if the temperature measured by the first temperature measuring component is higher than the high-temperature threshold or lower than the low-temperature threshold, the controller controls the first temperature measuring component to measure the temperature again after the preset time delay;
if the temperature measured by the first temperature measuring component is still higher than the high-temperature threshold value or lower than the low-temperature threshold value after more than two times of temperature measurement, the controller outputs a casting alarm.
Optionally, the temperature measuring device of the vacuum precision casting furnace is further improved, and the preset time delay, the high temperature threshold and the low temperature threshold are calibrated and obtained according to different casting material requirements or casting process requirements.
The working principle of the invention is as follows:
the controller respectively receives the real-time temperature measured by the first temperature measuring component and the second temperature measuring component and the power source output fed back by the sensor (so as to obtain the stroke of the first temperature measuring component). Taking a temperature measurement plan of the preferred embodiment of the present invention as an example (the measurement plan can be set according to actual conditions), the controller enables the first temperature measurement component and the second temperature measurement component to perform temperature measurement, the first temperature measurement component and the second temperature measurement component feed back temperature signals to the controller, and the sensor feeds back the stroke of the first temperature measurement component to the controller. If the difference between the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component is greater than or equal to the temperature difference threshold value, the fault of one of the first temperature measurement component and the second temperature measurement component can be preliminarily judged, and the fault alarm of the output temperature measurement component can be selected at the moment. Or the controller compares the output signal (the stroke of the power source driving the first temperature measurement component) with the sensor feedback signal (the actual stroke of the first temperature measurement component) to judge whether the first temperature measurement component reaches the designated position for temperature measurement, and if the first temperature measurement component does not reach the designated position, the controller outputs a fault alarm of the first temperature measurement component. Because the second temperature measuring component of the invention adopts the optical thermometer, the optical thermometer is not influenced by the stroke, and the temperature of the second temperature measuring component is taken as the temperature in the vacuum precision casting furnace for production control under the condition of failure alarm of the first temperature measuring component. Whether the temperature in the vacuum precision casting furnace meets the production requirements or not can be judged through the combination of the preset time delay, the high-temperature threshold and the low-temperature threshold. If the temperature in the vacuum precision casting furnace still does not meet the design requirement after multiple measurements, the fault (the over-temperature cannot be generated on time or the design temperature cannot be reached) of the smelting part of the vacuum precision casting furnace is indicated, and therefore a casting alarm is sent.
The temperature measuring device for the vacuum precision casting furnace provided by the invention can realize real-time and accurate temperature measurement in the vacuum precision casting furnace, is further favorable for accurately measuring the temperature during the production of the alloy with higher active metal content, realizes direct casting, avoids the defects of long measuring time and low casting forming rate, and improves the production efficiency. In addition, the invention can accurately judge the fault source through the temperature signal and the travel signal acquired and received by the sensor and the controller, sends an alarm aiming at the fault, is beneficial to fault elimination and greatly saves maintenance time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, however, and may not be intended to accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of values or properties encompassed by exemplary embodiments in accordance with the invention. The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a first schematic structural diagram of the present invention.
Fig. 2 is a second structural diagram of the present invention, which shows a view angle in the direction of a in fig. 1.
Fig. 3 is a third structural schematic view of the present invention, which shows a cross-sectional structure at the B-B position in fig. 2.
FIG. 4 is a fourth structural schematic view of the present invention, which shows a cross-sectional structure at the C-C position in FIG. 2.
Description of the reference numerals
A lower chamber 4;
Support 7
Coupling 8
Closed hollow mounting bracket 15
Vacuum precision casting furnace wall 16
Rotating shaft sealing flange 21
Drive shaft end cap 22
Center annulus O-ring seal 24
KF clamp 25
Pneumatic vacuum ball valve 26
An O-ring 27.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solutions of these exemplary embodiments to those skilled in the art.
A first embodiment;
as shown in FIG. 1, the present invention provides a temperature measuring device for a vacuum precision casting furnace, comprising: the first temperature measuring component and the second temperature measuring component;
a first thermometric assembly comprising: the upper cavity 1, the line concentration cavity 2, the transmission cavity 3 and the lower cavity 4 are sequentially arranged from top to bottom and are fixedly connected in a sealing manner;
a power source 5, a sensor 6 and a controller (not shown in the figure) are fixed on a support 7 beside a transmission cavity, the sensor 6 detects the output of the power source 5 and feeds back the output to the controller, the controller controls the output of the power source according to the signal of the sensor 6, the power source is connected with a driving shaft 9 through a coupler 8, the driving shaft 9 is in key connection with a transmission gear 10 positioned in the transmission cavity 3, the transmission gear 10 is meshed to drive a main shaft 11 to reciprocate up and down, a main shaft support frame 12 is fixed in the transmission cavity 3, and a first temperature detector 13 is fixed at the bottom;
the second temperature measurement subassembly includes: a second temperature detector 14 and a closed hollow mounting bracket 15, wherein the second temperature detector 14 is mounted at one end of the closed hollow mounting bracket 15 far away from the vacuum precision casting furnace wall 16.
A second embodiment;
as shown in fig. 1 to 4, the present invention provides a temperature measuring device for a vacuum precision casting furnace, comprising: the first temperature measuring component and the second temperature measuring component;
a first thermometric assembly comprising: the upper cavity 1, the line concentration cavity 2, the transmission cavity 3 and the lower cavity 4 are sequentially arranged from top to bottom and are fixedly connected in a sealing manner;
the transmission cavity 3 and the lower cavity 4 are connected through an O-shaped sealing ring 33 through bolts, the transmission cavity 3 and the line concentration cavity 2 are connected through an O-shaped sealing ring 32 through bolts, the line concentration cavity 2 and the upper cavity 1 are connected through an O-shaped sealing ring through bolts, a cavity cover 20 is formed on one side wall of the line concentration cavity 2, and the cavity cover 20 is sealed and fixed through bolts and the O-shaped sealing ring.
A power source 5, a sensor 6 and a controller (not shown in the figure) are fixed on a support 7 beside a transmission cavity, the sensor 6 detects the output of the power source 5 and feeds back the output to the controller, the controller controls the output of the power source according to the signal of the sensor 6, the power source is connected with a driving shaft 9 through a coupler 8, the position of the driving shaft 9 entering the transmission cavity 3 is sealed by fixing an O-shaped sealing ring through a rotating shaft sealing flange 21, the top end of the driving shaft 9 is inserted into a driving shaft end cover 22 on the transmission cavity 3, the driving shaft 9 is in key connection with a transmission gear 10 positioned in the transmission cavity 3, the transmission gear 10 is meshed with a main shaft 11 to drive the main shaft 11 to reciprocate up and down, a main shaft support frame; namely, the driving shaft 9 is connected with the dynamic thermocouple compensation wire 18 through threads, and the thermocouple temperature measuring rod and the thermocouple compensation terminal move together;
a cavity door 23 is formed on one side wall of the lower chamber 4, and the cavity door 23 is sealed and fixed through bolts and O-shaped sealing rings.
The second temperature measurement subassembly includes: the second temperature detector 14 and the closed hollow mounting bracket 15, wherein the second temperature detector 14 is mounted at one end of the closed hollow mounting bracket 15 far away from the vacuum precision casting furnace wall 16;
the closed hollow mounting bracket 15 is connected with a mounting head of the second thermometer 14 and a pneumatic vacuum ball valve 26 through a central annular O-shaped sealing ring 24 and a KF clamp 25;
a preset included angle is formed between the first temperature measuring component and the second temperature measuring component, and the lower chamber 4 and the closed hollow mounting bracket 15 are fixed on the vacuum precision casting furnace wall 16;
the first temperature detector 13 is a thermocouple temperature measuring rod, the bottom end of the main shaft 11 is fixed with the thermocouple temperature measuring rod, the concentrator 17 is fixed on the inner wall of the line concentration cavity 2, and a thermocouple compensation line 18 enters into a thermocouple compensation terminal connected with the thermocouple temperature measuring rod from the line inlet of the line concentration cavity 2;
the guide rod roller 19 is fixed in the upper cavity 1, is fixedly connected with the main shaft 11 and is used for guiding the main shaft 11;
the second thermometer is an optical thermometer, the sensor is an absolute value encoder, and the controller is a PLC or MCU.
And, further improve above-mentioned second embodiment, because the detection light of the optical temperature detector needs to pass its own glass structure, and the precision casting furnace is apt to produce the pollution to the glass structure of the optical temperature detector and influence the temperature measurement, therefore increase and sweep the device in the airtight hollow mounting bracket 15 close to the position of the glass structure of the optical temperature detector, should sweep the device according to the order of the controller, blow the inert gas to the glass structure of the optical temperature detector regularly, avoid the pollution of the glass structure to influence the temperature measurement.
And, further improve above-mentioned second embodiment, need use the metal covering fixed when the optics thermoscope is installed, and the metal can absorb the heat radiation, causes the optics thermoscope to survey inaccurately. Therefore, the metal sleeves which can be used on the second temperature measurement component are both double-layer metal sleeves, and the water cooling structure is arranged in each metal sleeve for avoiding the influence of heat radiation on the optical thermometer.
The structures of the first embodiment and the second embodiment of the invention are hermetically connected, for example, sealing rings are added to prevent heat in the vacuum precision casting furnace from leaking.
A third embodiment;
the third embodiment of the present invention is implemented based on the hardware structure of the first embodiment or the second embodiment, and repeated descriptions are omitted;
the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval; the first period of time is not likely to be too long, and it is recommended that the first period of time is in the range of 1-120 seconds. Since the second temperature measurement component is an optical thermometer (such as an infrared thermometer), the collected temperature is sent to the controller after being processed by signals. Because the optical thermometer belongs to a non-contact thermometer, the optical thermometer does not need secondary control measurement in nature, and can continuously measure the temperature and feed back signals in real time; the temperature is measured simultaneously or sequentially in the first time period, and the measuring state of the first temperature measuring assembly and the second temperature measuring assembly is mainly convenient to describe;
if the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measurement assembly and the second temperature measurement assembly to measure the temperatures simultaneously or successively within a first time period after the preset time delay, and if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the controller outputs a temperature measurement assembly fault alarm.
The preset delay time can be directly specified, and the range of the preset delay time is recommended to be 1 second-120 seconds, for example, the preset delay time is obtained according to different casting material requirements or casting process requirements.
Illustratively, the first thermometer and the second thermometer of the invention are of different types, and the difference in structure and measurement mode causes the two thermometers to have measurement temperature deviation. For example: the optical thermometer and the thermocouple temperature measuring rod in the above embodiment;
for the same measured object, under the condition that the first temperature detector and the second temperature detector can accurately carry out measurement, the temperature difference obtained by measurement of the first temperature detector and the second temperature detector is within the theoretical error, so when the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is greater than or equal to the temperature difference threshold value, the possibility that a certain temperature measurement assembly fails is indicated, in order to avoid false alarm, the controller controls the first temperature measurement assembly and the second temperature measurement assembly to measure the temperatures simultaneously or successively within a first time period after preset time delay, and if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the fault alarm is confirmed.
A fourth embodiment;
the third embodiment of the present invention is implemented based on the hardware structure of the first embodiment or the second embodiment, and repeated descriptions are omitted;
the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval; the first period of time is not likely to be too long, and it is recommended that the first period of time is in the range of 1-120 seconds. Since the second temperature measurement component is an optical thermometer (such as an infrared thermometer), the collected temperature is sent to the controller after being processed by signals. Because the optical thermometer belongs to a non-contact thermometer, the optical thermometer does not need secondary control measurement in nature, and can continuously measure the temperature and feed back signals in real time; the temperature is measured simultaneously or sequentially in the first time period, and the measuring state of the first temperature measuring assembly and the second temperature measuring assembly is mainly convenient to describe;
if the difference between the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measurement component and the second temperature measurement component to measure the temperature simultaneously or successively within a first time interval after presetting the delay, if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the controller judges whether the first temperature measurement component is in fault or not according to a detection signal (the detected stroke of the first temperature measurement component) of the sensor and an output signal (the instructed stroke of the first temperature measurement component), if the first temperature measurement component is in fault, a fault alarm of the first temperature measurement component is sent, and the temperature measured by the second temperature measurement component is used as the temperature measured by the vacuum precision casting furnace for production control (production control including mold shell lifting and the like).
The embodiment is a further improvement on the design idea of the third embodiment, and the first temperature measurement assembly is compared with the second temperature measurement assembly, as mentioned above, the optical thermometer is a non-contact measurement, and has the advantages of simple structure, no need of executing mechanical action, capability of measuring in real time without interruption, good stability, low failure rate, and high accuracy without a thermocouple temperature measurement rod. The most likely failure is of the first thermometric component, particularly the mechanical portion of the thermocouple thermometric wand. Therefore, when the difference of the measured temperatures is larger than or equal to the temperature difference threshold value continuously, whether the first temperature measuring component is in failure (namely whether the thermocouple thermometric rod is descended to the specified position for accurate measurement) can be judged through the comparison of the output signal of the controller and the detection signal of the sensor. If the first temperature measurement component fails to avoid influencing the production, the temperature measured by the two temperature measurement components is used as the temperature measured by the vacuum precision casting furnace for production control.
A fifth embodiment;
the third embodiment of the present invention is implemented based on the hardware structure of the first embodiment or the second embodiment, and repeated descriptions are omitted;
the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval; the first period of time is not likely to be too long, and it is recommended that the first period of time is in the range of 1-120 seconds. Since the second temperature measurement component is an optical thermometer (such as an infrared thermometer), the collected temperature is sent to the controller after being processed by signals. Because the optical thermometer belongs to a non-contact thermometer, the optical thermometer does not need secondary control measurement in nature, and can continuously measure the temperature and feed back signals in real time; the temperature is measured simultaneously or sequentially in the first time period, and the measuring state of the first temperature measuring assembly and the second temperature measuring assembly is mainly convenient to describe;
if the difference between the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measurement component and the second temperature measurement component to measure the temperature simultaneously or successively within a first time interval after presetting the delay, if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the controller judges whether the first temperature measurement component is in fault or not according to a detection signal (the detected stroke of the first temperature measurement component) of the sensor and an output signal (the instructed stroke of the first temperature measurement component) of the sensor, if the first temperature measurement component is in fault, the controller sends out a fault alarm of the first temperature measurement component, and the temperature measured by the second temperature measurement component is taken as the temperature measured by the vacuum precision casting furnace for production control (production control including mold shell lifting and the like);
if the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is smaller than the temperature difference threshold value, and the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly are both higher than the high temperature threshold value or both lower than the low temperature threshold value, the controller controls the first temperature measurement assembly to perform temperature measurement again after preset time delay;
if the temperature measured by the first temperature measuring component is higher than the high-temperature threshold or lower than the low-temperature threshold, the controller controls the first temperature measuring component to measure the temperature again after the preset time delay;
if the temperature measured by the first temperature measuring component is still higher than the high-temperature threshold value or lower than the low-temperature threshold value after more than two times of temperature measurement, the controller outputs a casting alarm;
and calibrating and obtaining the preset time delay, the high-temperature threshold and the low-temperature threshold according to different casting material requirements or casting process requirements.
This embodiment is a further improvement on the design concept of the fourth embodiment, and the parts with the same principle are not described again. The difference between the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component is smaller than the temperature difference threshold value, which indicates that the working state of the temperature measurement device accords with the design, but the conditions that the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component are both higher than the high temperature threshold value or both lower than the low temperature threshold value occur (the high temperature threshold value and the low temperature threshold value can be selected as the highest temperature and the lowest temperature required by the production process or the temperature selected according to actual needs), which indicates that the temperature does not accord with the design production temperature, because the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component both exceed the limits, the probability that the temperature measured by the first temperature measurement component and the temperature measured by. The temperature can be judged by measuring again after time delay, and if the temperature exceeds the limit, the casting part of the precision casting furnace can be judged to have a fault (for example, a mold shell cannot rise to a specified position), and a casting alarm is output.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (8)
1. The utility model provides a vacuum precision casting stove temperature measuring device which characterized in that includes: the first temperature measuring component and the second temperature measuring component;
a first thermometric assembly comprising: the upper cavity, the line concentration cavity, the transmission cavity and the lower cavity are sequentially arranged from top to bottom and are fixedly connected in a sealing manner;
the power source, the sensor and the controller are fixed on a support beside the transmission cavity, the sensor detects that the power source outputs and feeds back to the controller, the power source is connected with a driving shaft through a coupler, the driving shaft is connected with a transmission gear positioned in the transmission cavity in a key mode, the transmission gear is meshed with the transmission gear to drive the main shaft to reciprocate up and down, the main shaft support frame is fixed in the transmission cavity, and the first temperature detector is fixed at the bottom end of the;
the controller controls the power source output to execute the following repeated temperature measurement control according to the sensor signal, the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
if the difference between the temperature measured by the first temperature measuring assembly and the temperature measured by the second temperature measuring assembly is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measuring assembly and the second temperature measuring assembly to measure the temperatures simultaneously or successively within a first time period after presetting time delay, and if the difference between the temperature measured again is still greater than or equal to the temperature difference threshold value, the controller outputs a temperature measuring assembly fault alarm;
the second temperature measurement subassembly includes: the second temperature detector is arranged at one end of the sealed hollow mounting bracket, which is far away from the vacuum precision casting furnace wall;
a preset included angle is formed between the first temperature measuring component and the second temperature measuring component, and the lower cavity and the closed hollow mounting bracket are fixed on the vacuum precision casting furnace wall.
2. The temperature measuring device of the vacuum precision casting furnace according to claim 1, characterized in that: the first temperature detector is a thermocouple temperature measuring rod;
the bottom end of the main shaft is fixed with a thermocouple temperature measuring rod, the concentrator is fixed on the inner wall of the line concentration cavity, and a thermocouple compensation line enters a thermocouple compensation terminal connected with the thermocouple temperature measuring rod from a line inlet of the line concentration cavity.
3. The temperature measuring device of the vacuum precision casting furnace according to claim 2, further comprising:
the guide rod roller is fixed in the upper cavity, is fixedly connected with the main shaft and is used for guiding the main shaft.
4. The temperature measuring device of the vacuum precision casting furnace according to claim 1, characterized in that: the second thermometer is an optical thermometer.
5. The temperature measuring device of the vacuum precision casting furnace according to claim 1, characterized in that: the sensor is an absolute value encoder, and the controller is a PLC or MCU.
6. The temperature measuring device of the vacuum precision casting furnace according to claim 1, characterized in that:
the controller executes the following repeated temperature measurement control on the output of the control power source according to the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
if the difference between the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly is smaller than the temperature difference threshold value, and the temperature measured by the first temperature measurement assembly and the temperature measured by the second temperature measurement assembly are both higher than the high temperature threshold value or both lower than the low temperature threshold value, the controller controls the first temperature measurement assembly to perform temperature measurement again after preset time delay;
if the temperature measured by the first temperature measuring component is higher than the high-temperature threshold or lower than the low-temperature threshold, the controller controls the first temperature measuring component to measure the temperature again after the preset time delay;
if the temperature measured by the first temperature measuring component is still higher than the high-temperature threshold or lower than the low-temperature threshold after the temperature measurement, the controller outputs a casting alarm.
7. The temperature measuring device of the vacuum precision casting furnace according to claim 6, characterized in that:
and calibrating and obtaining the preset time delay, the high-temperature threshold and the low-temperature threshold according to different casting material requirements or casting process requirements.
8. The utility model provides a vacuum precision casting stove temperature measuring device which characterized in that includes: the first temperature measuring component and the second temperature measuring component;
a first thermometric assembly comprising: the upper cavity, the line concentration cavity, the transmission cavity and the lower cavity are sequentially arranged from top to bottom and are fixedly connected in a sealing manner;
the power source, the sensor and the controller are fixed on a support beside the transmission cavity, the sensor detects that the power source outputs and feeds back to the controller, the power source is connected with a driving shaft through a coupler, the driving shaft is connected with a transmission gear positioned in the transmission cavity in a key mode, the transmission gear is meshed with the transmission gear to drive the main shaft to reciprocate up and down, the main shaft support frame is fixed in the transmission cavity, and the first temperature detector is fixed at the bottom end of the;
the controller controls the power source output to execute the following repeated temperature measurement control according to the sensor signal, the temperature measured by the first temperature measurement component and the temperature measured by the second temperature measurement component;
the controller controls the first temperature measuring component and the second temperature measuring component to measure the temperature simultaneously or sequentially in a first time interval;
if the difference between the temperature measured by the first temperature measuring assembly and the temperature measured by the second temperature measuring assembly is greater than or equal to the temperature difference threshold value, the controller controls the first temperature measuring assembly and the second temperature measuring assembly to measure the temperatures at the same time or in sequence within a first time period after the preset time delay;
if the difference of the measured temperatures is still larger than or equal to the temperature difference threshold value again, the controller judges whether the first temperature measuring assembly fails or not according to the detection signal of the sensor and the output signal of the sensor, if the first temperature measuring assembly fails, a failure alarm of the first temperature measuring assembly is sent out, and the temperature measured by the second temperature measuring assembly is used as the temperature measured by the vacuum precision casting furnace for production control;
the second temperature measurement subassembly includes: the second temperature detector is arranged at one end of the sealed hollow mounting bracket, which is far away from the vacuum precision casting furnace wall;
a preset included angle is formed between the first temperature measuring component and the second temperature measuring component, and the lower cavity and the closed hollow mounting bracket are fixed on the vacuum precision casting furnace wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316448.4A CN112692245B (en) | 2021-03-25 | 2021-03-25 | Temperature measuring device of vacuum precision casting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316448.4A CN112692245B (en) | 2021-03-25 | 2021-03-25 | Temperature measuring device of vacuum precision casting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112692245A CN112692245A (en) | 2021-04-23 |
| CN112692245B true CN112692245B (en) | 2021-06-22 |
Family
ID=75516783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110316448.4A Active CN112692245B (en) | 2021-03-25 | 2021-03-25 | Temperature measuring device of vacuum precision casting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112692245B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757263A (en) * | 2003-03-06 | 2006-04-05 | 莱克公司 | Analytical furnace with predictive temperature control |
| CN100400201C (en) * | 2004-01-21 | 2008-07-09 | 雅马哈发动机株式会社 | Thermosensor for casting machine and casting machine |
| CN106796087A (en) * | 2014-10-10 | 2017-05-31 | 气体产品与化学公司 | For the integrated sensor system and method for combustion process |
| CN106862528A (en) * | 2016-01-28 | 2017-06-20 | 诸建芬 | A kind of automobile damper bracket mould |
| CN107300320A (en) * | 2017-06-09 | 2017-10-27 | 佛山市高捷工业炉有限公司 | A kind of industrial smelting furnace heating means and terminal |
| CN107855509A (en) * | 2016-09-22 | 2018-03-30 | 宝山钢铁股份有限公司 | Temperature measurement on-line control device and method in ladle baking |
| CN111842814A (en) * | 2020-07-30 | 2020-10-30 | 合智熔炼装备（上海）有限公司 | Vacuum precision casting furnace, temperature measuring device of vacuum precision casting furnace and temperature measuring method |
-
2021
- 2021-03-25 CN CN202110316448.4A patent/CN112692245B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757263A (en) * | 2003-03-06 | 2006-04-05 | 莱克公司 | Analytical furnace with predictive temperature control |
| CN100400201C (en) * | 2004-01-21 | 2008-07-09 | 雅马哈发动机株式会社 | Thermosensor for casting machine and casting machine |
| CN106796087A (en) * | 2014-10-10 | 2017-05-31 | 气体产品与化学公司 | For the integrated sensor system and method for combustion process |
| CN106862528A (en) * | 2016-01-28 | 2017-06-20 | 诸建芬 | A kind of automobile damper bracket mould |
| CN107855509A (en) * | 2016-09-22 | 2018-03-30 | 宝山钢铁股份有限公司 | Temperature measurement on-line control device and method in ladle baking |
| CN107300320A (en) * | 2017-06-09 | 2017-10-27 | 佛山市高捷工业炉有限公司 | A kind of industrial smelting furnace heating means and terminal |
| CN111842814A (en) * | 2020-07-30 | 2020-10-30 | 合智熔炼装备（上海）有限公司 | Vacuum precision casting furnace, temperature measuring device of vacuum precision casting furnace and temperature measuring method |
Non-Patent Citations (1)
| Title |
|---|
| 一种高温铸造炉自动检测系统的设计;亓波等;《自动化应用》;20141130;第56-57页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112692245A (en) | 2021-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2383874C2 (en) | Device for continuous measurement of melt steel temperature in intermediate casting accessory, using optical fibre and pyrometre of infrared radiation | |
| CN1116593C (en) | Method for continuous measuring molten steel temperature and temp. measuring tube | |
| CN102192797B (en) | Smelting temperature measuring device for directional solidification | |
| CN1936524A (en) | Pouring-basket plug-rod with continuous temperature measuring function | |
| CN200991711Y (en) | Band-steel temperature-measuring apparatus of hot rolling lamina flow cooling system | |
| CN112692245B (en) | Temperature measuring device of vacuum precision casting furnace | |
| CN102661966A (en) | Method and device for measuring linear shrinkage rate and thermal stress of metal solidification process | |
| CN111842814A (en) | Vacuum precision casting furnace, temperature measuring device of vacuum precision casting furnace and temperature measuring method | |
| CN106370695B (en) | Device and method for measuring thermal resistance of continuous casting mold flux film | |
| CN203068996U (en) | Temperature measuring device for medium-frequency induction sintering furnace | |
| CN210711615U (en) | Device for monitoring erosion state of converter lining in real time on line | |
| CN205262235U (en) | Reducing furnace thermocouple sealing device | |
| CN202119557U (en) | Melting temperature measuring device used by directional solidification | |
| CN211854881U (en) | Control device for combustion system of aluminum melting furnace | |
| CN212459004U (en) | Top-blown furnace slag temperature measurement sampling device | |
| CN204313964U (en) | Temperature-detecting device between a kind of welding pre-heating temperature and road | |
| CN106989823B (en) | A kind of induction melting multi-stage reducing infrared temperature measurement apparatus and temp measuring method | |
| CN202305016U (en) | Precise Temperature measurement supplementary structure for vacuum induction furnace | |
| CN105710204A (en) | Forming tool with temperature measuring function for incremental forming | |
| CN111947978A (en) | Temperature measurement and sampling device and method for top-blown furnace slag | |
| CN213147394U (en) | Contact type melt temperature measurement system of vacuum induction smelting furnace | |
| CN111250686A (en) | Liquid level online real-time monitoring system for magnesium alloy quantitative casting | |
| CN217083970U (en) | Temperature measuring device for support plate glass melting furnace | |
| CN213113394U (en) | Process monitoring device for front-mounted tapping furnace of smelting reduction furnace | |
| CN211373207U (en) | Real-time monitoring device for molten aluminum of heat preservation furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |