CN204657463U - A kind of casting ladle - Google Patents
A kind of casting ladle Download PDFInfo
- Publication number
- CN204657463U CN204657463U CN201520345944.2U CN201520345944U CN204657463U CN 204657463 U CN204657463 U CN 204657463U CN 201520345944 U CN201520345944 U CN 201520345944U CN 204657463 U CN204657463 U CN 204657463U
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- thermocouple
- module
- casting ladle
- human body
- signal
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Abstract
The utility model discloses a kind of casting ladle, comprise cylindrical shell and support, described support is installed with thermocouple, described thermocouple is for detecting barrel temperature, described thermocouple is connected with warning circuit, described warning circuit comprises induction module, is converted into sampled voltage for the temperature signal of being sampled by thermocouple; Comparison module, is connected to induction module, is provided with the first reference voltage, when described sampled voltage is greater than reference voltage, and output enable signal; Pyroelectricity module, is connected to comparison module, obtains electric enable when receiving enable signal, when detect to have biological thermal source near described cylindrical shell time, send alarm signal; Alarm module, is connected to pyroelectricity module, when receiving alarm signal, reminds the current barrel temperature of user too high.
Description
Technical field
The utility model relates to a kind of Casting Equipment, and more particularly, it relates to a kind of casting ladle.
Background technology
Casting ladle is used for foundry's pouring practice, after molten metal is accepted in stokehold, transports to casting mold pour into a mould by driving. be divided into ladle, steel ladle, teapot bag, the multiple patterns such as magnesium iron bag.Casting ladle suspension rod, suspension ring belong to forging and stamping and form, than good, safe and reliable by general steel plate cutting intensity.Containing amount simultaneously, material make (standard JB5550-91, JB/T5771-91) by national machinery industry standard.Not having and kowtow and card cogwheel phenomenon. gearbox adopts two worm gear to pass, although manufacture requirements is high, freely, bidirectional reversible is good in ensuring smooth transmission.But existing casting ladle exists a safety problem, when people is for going to use, correctly cannot know the metal temperature of casting ladle inner barrel, even if even if metal solidification, its barrel temperature does not also decline, and skin contact that is direct and people is very easy to cause potential safety hazard.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is by detecting casting ladle barrel temperature, and when temperature is too high, whether human body is close, when human body being detected from this casting ladle hypotelorism, the current casting ladle temperature anomaly of user can be reminded, thus reduce the safe casting ladle of one of potential safety hazard.
For achieving the above object, the utility model provides following technical scheme: a kind of casting ladle, comprise cylindrical shell and support, described support is installed with thermocouple, described thermocouple is for detecting barrel temperature, described thermocouple is connected with warning circuit, and described warning circuit comprises induction module, is converted into sampled voltage for the temperature signal of being sampled by thermocouple; Comparison module, is connected to induction module, is provided with the first reference voltage, when described sampled voltage is greater than reference voltage, and output enable signal; Human body proximity switch module, is connected to comparison module, obtains electric enable when receiving enable signal, when detect to have human body near described cylindrical shell time, send alarm signal; Alarm module, is connected to human body proximity switch module, when receiving alarm signal, reminds the current barrel temperature of user too high.
After casting completes, the barrel temperature of this casting ladle is still higher, in this case, if user is ignorant directly use skin contact drum surface near arranging, so be very easy to be scalded, the utility model is by arranging warning circuit, and by thermocouple, drum surface temperature is sampled, and the temperature after sampling is fed back, when temperature exceedes safe temperature, comparison module will enable human body proximity switch module to external world biological thermal source respond to, if human body proximity detected, so the current temperature of user is reminded to exceed safety problem by alarm module, otherwise, when temperature is lower than safe temperature, can not enable human body proximity switch module, make the design's power consumption lower, ensure that service time and life-span.
The utility model can be set to further: described induction module comprises enlarging section, is connected to the positive pole of described thermocouple, for amplifying the sampled voltage of thermocouple; Compensation section, is connected to the negative pole of described thermocouple, and environmentally temperature difference compensates the sample temperature of thermocouple.
By the setting of enlarging section and compensation section, can compensate according to the detected temperatures of ambient temperature to thermocouple, by the mode compensated, the metrical error of thermocouple is reduced to minimum, amplified by enlarging section simultaneously, can ensure that its output voltage is to support that comparison module carries out sampling and compares.
The utility model can be set to further: described induction module also comprises filtering part, is connected to the positive pole of thermocouple.By the setting of filtering part, the noise of the positive pole input voltage of thermocouple can be reduced, ensure the precision of sampling.
The utility model can be set to further: the positive pole of described thermocouple is also connected to sensor outage detection resistance.By the setting of sensor outage detection resistance, during thermocouple broken string, the output of amplifier will go beyond the scope, but because being connected to sensor outage detection resistance, thermocouple internal resistance will produce offset voltage.
The utility model can be set to further: described comparison module comprises the first comparator, and its negative input end is connected to the first reference voltage, and its positive input terminal is connected to sampled voltage; Second comparator, its positive input terminal is connected to the second reference voltage, and its negative input end is connected to sampled voltage.By the setting of comparator, the signal accuracy that sampling exports can be improved.
The utility model can be set to further: described warning circuit also comprises indicating module described in indicating module and comprises the first light emitting diode, and its anode is connected to the first comparator output terminal; Second light emitting diode, its anode is connected to the second comparator output terminal.
By arranging two light emitting diodes, the current temperature of user can be reminded to be normal safe state or abnormal condition state.
The utility model can be set to further: described human body proximity switch module comprises tablet, is fixedly arranged on described support, for forming distribution capacity with human body; One end of described tablet is in series with the first derided capacitors, and its other end is connected to the second derided capacitors; Bidirectional triode thyristor, is coupled between tablet and external ac power source, and it is controlled by enable signal conducting; Puncture portion, be connected to tablet, export breakdown signal when human body proximity tablet; One-way SCR, is connected to and punctures portion, the conducting when receiving breakdown signal; Relay coil, is series at one-way SCR.
The utility model can be set to further: described alarm module comprises the relay normally open contact, buzzer and the alarm lamp that are arranged in series successively, when described relay coil obtains electric, and described relay normally open contact adhesive.One can be played and remind effect preferably.
By adopting technique scheme, compared to existing technology, create following effect: after casting completes, the barrel temperature of this casting ladle is still higher, in this case, if user is ignorant directly use skin contact drum surface near arranging, so be very easy to be scalded, the utility model is by arranging warning circuit, and by thermocouple, drum surface temperature is sampled, and the temperature after sampling is fed back, when temperature exceedes safe temperature, comparison module will enable human body proximity switch module to external world biological thermal source respond to, if human body proximity detected, so the current temperature of user is reminded to exceed safety problem by alarm module, otherwise, when temperature is lower than safe temperature, can not enable human body proximity switch module, make the design's power consumption lower, ensure that service time and life-span.
Accompanying drawing explanation
Fig. 1 is the utility model schematic appearance;
Fig. 2 is the utility model circuit theory diagrams one;
Fig. 3 is the utility model circuit theory diagrams two;
Fig. 4 is the utility model circuit theory diagrams three;
Fig. 5 is the utility model circuit theory diagrams four.
Reference numeral: 1a, thermocouple; 2a, cylindrical shell; 3a, support; 4a, tablet; 1, induction module; 11, enlarging section; 12, compensation section; 13, filtering part; 2, comparison module; 3, Executive Module; 4, indicating module; 5, human body proximity switch module; 6, alarm module.
Detailed description of the invention
Referring to figs. 1 through Fig. 5, the utility model embodiment is described further.
A kind of casting ladle, comprise cylindrical shell 2a and support 3a, described support 3a is installed with thermocouple K, 1a, and described thermocouple is for detecting cylindrical shell 2a temperature, and described thermocouple K, 1a are connected with warning circuit, and described warning circuit comprises
Induction module 1, is converted into sampled voltage for the temperature signal of thermocouple K, 1a being sampled; Comprise enlarging section 11, be connected to the positive pole of described thermocouple K, 1a, for amplifying the sampled voltage of thermocouple K, 1a; Compensation section 12, is connected to the negative pole of described thermocouple K, 1a, and environmentally temperature difference compensates the sample temperature of thermocouple K, 1a.Filtering part 13, is connected to the positive pole of thermocouple K, 1a.The positive pole of thermocouple K, 1a is also connected to sensor outage detection resistance.Fig. 2 is the circuit adopting LD35D to compensate thermocouple K, 1a (K type) cold junction.This circuit becomes corresponding 0 ~ 5V voltage 0 ~ 500 DEG C of temperature.Except amplification and temperature-compensating, also has sensor burn out detection.The output signal of thermocouple K, 1a is minimum, and every 1 DEG C is about 40 μ V, and therefore, this amplifier adopts high sensitivity ADJ707J amplifier.The induced electromotive force of cold-junction compensation circuit K type thermocouple K, 1a500 DEG C (full scale) of Fig. 2 thermocouple K, 1a is 20.64mV, and op-amp gain AV should be AV=5V/20164mV=242 (requiring as 5V because exporting when 500 DEG C).In circuit, R1=1k Ω, R2=232k Ω, RP3 are 20k Ω, determine gain size, make gain adjustable between 233 and 253 with RP3.R3 and C1 is low pass filter, and time constant is larger, and stress release treatment effect is better, but response speed is slack-off.In addition, R3 increases, the defeated of operational amplifier will produce offset voltage as bias current, and therefore, R3 value can not be excessive, the maximum input bias current of AD707J is 215nA, during R3=10k Ω, produce the offset voltage of 25 μ V, regulate RP1, make its a point voltage be 41 μ V/ DEG C, carry out cold-junction compensation.R6 is sensor outage detection resistance.During thermocouple K, 1a broken string, the output of amplifier will go beyond the scope, but because being connected to resistance R6, thermocouple K, 1a internal resistance will produce offset voltage.During power-off, amplifier input bias current will flow through R6, therefore, can not adopt the amplifier that input bias current is larger.
Comparison module 2, is connected to induction module 1, is provided with the first reference voltage, when described sampled voltage is greater than reference voltage, and output enable signal; First comparator, its negative input end is connected to the first reference voltage, and its positive input terminal is connected to sampled voltage; Second comparator, its positive input terminal is connected to the second reference voltage, and its negative input end is connected to sampled voltage.Comparator model elects LM335 as.
Described in indicating module 4, indicating module 4 comprises the first light emitting diode, and its anode is connected to the first comparator output terminal; Second light emitting diode, its anode is connected to the second comparator output terminal.The pipe of the first light emitting diode and the second light emitting diode falls and is 0.7V, so by arranging like this, it can be made to export hair element conducting voltage.Executive Module 3, comprise a NPN triode, its base stage is connected to the anode of the first light emitting diode, and the pressure drop of 0.7V makes this triode meet turn-on condition.
Human body proximity switch module 5 comprises some tablet 4a, is fixedly arranged on described support, for forming distribution capacity with human body; One end of described tablet 4a is in series with the first derided capacitors, and its other end is connected to the second derided capacitors; Bidirectional triode thyristor, be coupled between tablet 4a and external ac power source, it is controlled by enable signal conducting; Puncture portion, be connected to tablet 4a, export breakdown signal as human body proximity tablet 4a; One-way SCR, is connected to and punctures portion, the conducting when receiving breakdown signal; Relay coil, is series at one-way SCR.The tablet 4a metallic plate of 20 x 30cm is made, and it is connected on the live wire of civil power by C3.As human body proximity tablet 4a, stand between the human body of large ground and tablet 4a and form distribution capacity C2, C2 and C3 is that series connection carries out dividing potential drop to civil power, if when this dividing potential drop is greater than neon lamp starting voltage, neon lamp is breakdown to be lighted, and trigger unidirectional thyristor conducting, make relay K obtain electric work, the contact K1 of relay K can realize the control to various power supply and circuit.
Alarm module 6, is connected to human body proximity switch module 5, when receiving alarm signal, reminds user's current cylindrical shell 2a that temperature is too high.Alarm module 6 comprises the relay normally open contact, buzzer and the alarm lamp that are arranged in series successively, when described relay coil obtains electric, and described relay normally open contact adhesive.
The above is only preferred embodiment of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a casting ladle, comprises cylindrical shell and support, it is characterized in that: described support is installed with thermocouple, and described thermocouple is for detecting barrel temperature, and described thermocouple is connected with warning circuit, and described warning circuit comprises
Induction module, is converted into sampled voltage for the temperature signal of being sampled by thermocouple;
Comparison module, is connected to induction module, is provided with the first reference voltage, when described sampled voltage is greater than reference voltage, and output enable signal;
Human body proximity switch module, is connected to comparison module, obtains electric enable when receiving enable signal, when detect to have human body near described cylindrical shell time, send alarm signal;
Alarm module, is connected to human body proximity switch module, when receiving alarm signal, reminds the current barrel temperature of user too high.
2. a kind of casting ladle as claimed in claim 1, is characterized in that: described induction module comprises
Enlarging section, is connected to the positive pole of described thermocouple, for amplifying the sampled voltage of thermocouple;
Compensation section, is connected to the negative pole of described thermocouple, and environmentally temperature difference compensates the sample temperature of thermocouple.
3. a kind of casting ladle as claimed in claim 2, is characterized in that: described induction module also comprises filtering part, is connected to the positive pole of thermocouple.
4. a kind of casting ladle as described in claim 1 or 2 or 3, is characterized in that: the positive pole of described thermocouple is also connected to sensor outage detection resistance.
5. a kind of casting ladle as claimed in claim 1, is characterized in that: described comparison module comprises
First comparator, its negative input end is connected to the first reference voltage, and its positive input terminal is connected to sampled voltage;
Second comparator, its positive input terminal is connected to the second reference voltage, and its negative input end is connected to sampled voltage.
6. a kind of casting ladle as claimed in claim 5, is characterized in that: described warning circuit also comprises indicating module
Described indicating module comprises
First light emitting diode, its anode is connected to the first comparator output terminal;
Second light emitting diode, its anode is connected to the second comparator output terminal.
7. a kind of casting ladle as claimed in claim 1, is characterized in that: described human body proximity switch module comprises
Some tablets, are fixedly arranged on described support, for forming distribution capacity with human body;
One end of described tablet is in series with the first derided capacitors, and its other end is connected to the second derided capacitors;
Bidirectional triode thyristor, is coupled between tablet and external ac power source, and it is controlled by enable signal conducting;
Puncture portion, be connected to tablet, export breakdown signal when human body proximity tablet;
One-way SCR, is connected to and punctures portion, the conducting when receiving breakdown signal;
Relay coil, is series at one-way SCR.
8. a kind of casting ladle as claimed in claim 7, is characterized in that: described alarm module comprises the relay normally open contact, buzzer and the alarm lamp that are arranged in series successively, when described relay coil obtains electric, and described relay normally open contact adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345944.2U CN204657463U (en) | 2015-05-20 | 2015-05-20 | A kind of casting ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345944.2U CN204657463U (en) | 2015-05-20 | 2015-05-20 | A kind of casting ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204657463U true CN204657463U (en) | 2015-09-23 |
Family
ID=54127899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520345944.2U Expired - Fee Related CN204657463U (en) | 2015-05-20 | 2015-05-20 | A kind of casting ladle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204657463U (en) |
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2015
- 2015-05-20 CN CN201520345944.2U patent/CN204657463U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160520 |