CN216289545U - Construction safety block terminal - Google Patents
Construction safety block terminal Download PDFInfo
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- CN216289545U CN216289545U CN202122948726.6U CN202122948726U CN216289545U CN 216289545 U CN216289545 U CN 216289545U CN 202122948726 U CN202122948726 U CN 202122948726U CN 216289545 U CN216289545 U CN 216289545U
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Abstract
The utility model provides a construction safety distribution box, which effectively solves the problem that the construction distribution box in the prior art frequently stops power supply in summer so as to influence the construction process and the safety of workers. The construction distribution box comprises a temperature detection circuit and a current calculation circuit, wherein the temperature detection circuit detects temperature signals of elements in the construction distribution box by using a thermistor PTCR, compares the temperature signals to generate a comparison signal and a first high level, the comparison signal turns on the current calculation circuit and transmits the high level to the current calculation circuit, the current calculation circuit calculates the current signals on the elements in the construction distribution box to generate a difference signal, the first high level is used for generating an alarm signal, and the alarm signal is transmitted to a monitoring center, so that the safety of the distribution box is ensured.
Description
Technical Field
The utility model relates to the field of construction, in particular to a construction safety distribution box.
Background
In order to ensure the normal electricity utilization and the electricity utilization safety of a power distribution system on a construction site during actual use, the construction site is provided with a construction distribution box to ensure the personal safety of the electricity utilization safety of workers on the construction site.
However, in the actual use process of the construction distribution box, the elements in the construction distribution box are not effectively maintained and overhauled due to long-term use, so that the aging phenomenon is caused, in addition, the elements of the construction distribution box can generate a large amount of heat energy in the daily operation process, so that an overhigh temperature environment is generated, thereby causing the failure of internal elements of the distribution box and threatening the safety of workers on a construction site, particularly in summer hot weather environment, the short circuit phenomenon of the elements can be caused by high temperature to cause the failure of the whole construction distribution box, in the prior art, only the temperature detection phenomenon is set for the phenomenon, when the temperature is found to rise to the threshold value, the use of the construction distribution box is stopped, however, in summer, the ambient temperature is originally high, and the temperature of elements is easy to reach a threshold value, so that the power supply of the construction distribution box is easy to stop, and the whole construction process and the safety of workers are affected.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a construction safety distribution box, which effectively solves the problem that the distribution box in the prior art frequently stops power supply in summer to influence the construction process and the safety of workers.
The technical scheme of its solution is, a construction safety block terminal, the construction block terminal includes temperature-detecting circuit, electric current calculating circuit, temperature-detecting circuit utilizes thermistor PTCR to detect the temperature signal of construction block terminal inner member to produce comparison signal and first high level after comparing the temperature signal, comparison signal opens electric current calculating circuit, and transmits the high level to electric current calculating circuit simultaneously, electric current calculating circuit carries out the operation with the electric current signal on the construction block terminal inner member, thereby produces the difference signal, and utilizes first high level to produce alarm signal, alarm signal transmission to surveillance center.
Further, the temperature detection circuit detects temperature signals of elements in the distribution box by using the thermistor PTCR, compares the temperature signals to generate a comparison signal, and generates a first high level after judgment by using the comparison signal, wherein the first high level turns on the current calculation circuit and transmits the first high level to the current calculation circuit.
Further, the temperature detection circuit comprises a diode D1, the anode of the diode D1 is connected to one end of a resistor R1 and one end of a hot rice weaning resistor PTCR, the cathode of the diode D1 is connected to one end of a resistor R3 and the base of a transistor Q1, the collector of the transistor Q1 is connected to the other end of a resistor R3, the other end of a resistor R1, one end of a resistor R5, one end of a resistor R8 and the emitter of a transistor Q2 are connected to a positive power supply, the emitter of the transistor Q1 is connected to one end of a resistor R2 and one end of a resistor R4, the other end of the resistor R4 is connected to the inverting terminal of an operational amplifier U3B, the non-inverting terminal of the operational amplifier U3B is connected to the other end of a resistor R5, the output terminal of the operational amplifier U3B is connected to the other end of the resistor R8, the base of a transistor Q2, the anode of a voltage regulator D2, and the collector of the transistor Q2 is connected to the anode of a diode D3, The circuit comprises a radiator, one end of a resistor R6, the cathode of a diode D3 is connected with one end of a relay K1, the cathode of a voltage regulator tube D2 is respectively connected with the control electrode of a thyristor Q3, one end of a capacitor C1 and the anode of a thyristor Q3, the cathode of the thyristor Q3 is connected with one end of a resistor R7, the other end of a resistor R7 is connected with one end of the capacitor C5, the other end of a capacitor C5 is respectively connected with the other end of the capacitor C1, the other end of a resistor R6, the other end of the relay K1, the other end of the resistor R2 and the other end of a thermistor PTCR and connected with the ground in parallel.
Furthermore, after the current calculation circuit is started by the high level output by the temperature detection circuit, the current signal on the element is subtracted to generate a difference signal, a second high level is obtained by utilizing the difference signal and is output to the mobile phone, and an alarm signal is output to the monitoring center after the second high level and the first high level are subjected to AND operation.
Further, the current calculating circuit comprises a switch S1, one end of the switch S1 is connected to a current signal, the other end of the switch S1 is connected to one end of a resistor R12, the other end of the resistor R12 is connected to one end of a resistor R9, one end of a resistor R13 and the same-phase end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is connected to one end of a capacitor C2, the other end of the resistor R13 and one end of a resistor R10, the output end of the operational amplifier U2B is connected to the other end of a resistor R10 and the inverting end of an operational amplifier U1B, the output end of the operational amplifier U1B is connected to the anode of a diode D4, the cathode of the diode D4 is connected to the mobile phone and the cathode of a diode D6, the anode of a diode D6 is connected to the anode of a diode D5, one end of a resistor R11 and a monitoring center, the other end of the resistor R11 is connected to the emitter of a positive polarity resistor R8 and a triode Q2 in the temperature detecting circuit, the cathode of the diode D5 is connected to the anode of the diode D3 in the temperature detection circuit and one end of the resistor R6, and the non-inverting end of the operational amplifier U1B is connected to the other end of the resistor R9, the other end of the capacitor C2 and the other end of the resistor R6 in the temperature detection circuit and connected to the ground.
The utility model realizes the following beneficial effects:
the current calculating circuit is arranged on the basis of the temperature detecting circuit arranged in the prior art, whether the element in the construction distribution box has the risk of short circuit or not is judged when the temperature of the element in the construction distribution box is detected to rise, and the construction distribution box stops supplying power when the risk of short circuit is detected, so that the safety of the construction distribution box is protected, an alarm signal is output to a monitoring center, a worker is reminded that the construction distribution box is in an unsafe state, the frequency of stopping the construction distribution box is reduced, and the problem that the construction distribution box in the prior art frequently stops supplying power when summer to influence the progress of construction and the safety of workers is solved.
Drawings
Fig. 1 is a schematic diagram of a temperature detection circuit of the present invention.
Fig. 2 is a schematic diagram of a current calculating circuit of the present invention.
Detailed Description
The foregoing and other technical and functional aspects of the present invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a construction safety block terminal, uses on the inside component of construction block terminal, the construction block terminal includes temperature detection circuit, electric current computational circuit, temperature detection circuit utilizes thermistor PTCR to detect the temperature signal of component in the construction block terminal to produce comparison signal and first high level after comparing temperature signal, comparison signal opens electric current computational circuit, and transmits the high level to electric current computational circuit simultaneously, electric current computational circuit calculates the electric current signal on with the component in the construction block terminal, thereby produces difference signal, and utilizes first high level to produce alarm signal, alarm signal transmission to surveillance center.
The temperature detection circuit comprises a diode D1, wherein the anode of a diode D1 is respectively connected with one end of a resistor R1 and one end of a hot rice weaning resistor PTCR, the cathode of the diode D1 is respectively connected with one end of a resistor R3 and the base of a triode Q1, the collector of a triode Q1 is respectively connected with the other end of a resistor R3, the other end of a resistor R1, one end of a resistor R5, one end of a resistor R8 and the emitter of a triode Q2 are connected with a positive power supply VCC, the emitter of the triode Q1 is respectively connected with one end of a resistor R2 and one end of a resistor R4, the other end of the resistor R4 is connected with the inverting end of an operational amplifier U3B, the non-phase end of the operational amplifier U3B is connected with the other end of a resistor R5, the output end of the operational amplifier U3B is respectively connected with the other end of a resistor R8 and the base of a triode Q2, the anode of a voltage regulator D2, the collector of a triode Q2 is respectively connected with the anode of a diode D3, one end of the resistor R6 and a radiator, the negative electrode of the diode D3 is connected with one end of the relay K1, the negative electrode of the voltage regulator tube D2 is respectively connected with the control electrode of the thyristor Q3, one end of the capacitor C1 and the anode of the thyristor Q3, the cathode of the thyristor Q3 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with one end of the capacitor C5, the other end of the capacitor C5 is respectively connected with the other end of the capacitor C1, the other end of the resistor R6, the other end of the relay K1, the other end of the resistor R2 and the other end of the thermistor PTCR, and the other ends are connected in parallel and grounded;
the temperature detection circuit detects a temperature signal of an element in a construction distribution box by using a thermistor PTCR, the temperature signal is divided by a resistor R1 and the thermistor PTCR and then is output to a triode Q1 by a diode D1, the triode Q1 buffers the temperature signal and then transmits the temperature signal to an operational amplifier U3B by the resistor R4 to be compared with a threshold signal, wherein the threshold signal is a temperature threshold value provided by a resistor R5, the operational amplifier U3B outputs a comparison signal after comparison, the comparison signal is judged by using a voltage stabilizing tube D2 and a triode Q2, when the voltage stabilizing tube D2 is conducted, the temperature on the element is in a normal state, at the moment, the construction distribution box is not required to be safely processed, at the moment, the voltage stabilizing tube D2 conducts a thyristor Q3 by using a capacitor C1, the thyristor Q3 discharges the comparison signal to the ground by using a capacitor C7 and a capacitor C2 to ensure the safety of the temperature detection circuit, and when triode Q2 was switched on, it showed that the temperature signal of the component in the block terminal of being under construction had surpassed the temperature threshold value, need to carry out processing on the block terminal of being under construction next step this moment, triode Q2 produced first high level, and this first high level switches on relay K1 through diode D3, and then opens the electric current calculating circuit, and switches on the radiator simultaneously, begins to carry out the heat dissipation for the component in the block terminal of being under construction and handles, transmits first high level to the electric current calculating circuit simultaneously.
The current calculating circuit comprises a switch S1, one end of a switch S1 is connected with a current signal, the other end of a switch S1 is connected with one end of a resistor R12, the other end of the resistor R12 is respectively connected with one end of a resistor R9, one end of a resistor R13 and the same-phase end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is respectively connected with one end of a capacitor C2, the other end of a resistor R13 and one end of a resistor R10, the output end of the operational amplifier U2B is respectively connected with the other end of a resistor R10 and the inverting end of an operational amplifier U1B, the output end of the operational amplifier U1B is connected with the anode of a diode D4, the cathode of a diode D4 is respectively connected with the mobile phone and the cathode of a diode D6, the anode of a diode D6 is respectively connected with the anode of a diode D5, one end of a resistor R11 and a monitoring center, the other end of a resistor R11 is respectively connected with one end of a triode R8 and the positive-polarity power supply Q2 in the temperature detecting circuit, the cathode of the diode D5 is connected with the anode of the diode D3 in the temperature detection circuit and one end of the resistor R6, the in-phase end of the operational amplifier U1B is connected with the other end of the resistor R9, the other end of the capacitor C2 and the other end of the resistor R6 in the temperature detection circuit and is connected with the ground in parallel;
the current calculating circuit is opened when a relay K1 in the temperature detecting circuit is conducted, at the moment, a switch S1 is closed, a current signal acquired in the prior art when an element works is transmitted to an operational amplifier U2B in two paths, one path is transmitted to the non-inverting terminal of the operational amplifier U2B by using a resistor R12, the other path is transmitted to the inverting terminal of the operational amplifier U2B after being delayed by using a resistor R13 and a capacitor C2, the operational amplifier U2B performs subtraction operation on the two paths of current signals to obtain a difference signal, the difference signal is subjected to zero-crossing comparison by using an operational amplifier U1B, whether the difference signal is a positive value or a negative value is detected, whether the current of the element is increased or not is known, when the operational amplifier U1B cannot conduct a diode D4, the current of the element does not increase when the element works, the element is in a safe state, and when the operational amplifier U1B conducts a diode D4, the current of the element increases when the element works, the diode D4 outputs a second high level at the moment, the second high level is output to a mobile phone of a maintenance person nearby the construction distribution box, the maintenance person presses down an emergency stop switch on the outer side of the box door as soon as possible, the construction distribution box stops supplying power to protect the safety of the construction distribution box, the first high level and the second high level output by the temperature detection circuit conduct an AND gate consisting of the diode D5, the diode D6 and the resistor R11, and therefore the first high level and the second high level are subjected to AND operation to output an alarm signal, the alarm signal is output to a monitoring center, the working person is reminded that the construction distribution box is in an unsafe state, and immediate maintenance is needed.
When the temperature detection circuit is used, the temperature signal of an element in a distribution box is detected by the temperature detection circuit through the thermistor PTCR, the triode Q1 buffers the temperature signal, transmits the buffered temperature signal to the operational amplifier U3B through the resistor R4 to be compared with a threshold signal, the operational amplifier U3B compares the buffered temperature signal and outputs a comparison signal, the comparison signal is judged by the voltage regulator tube D2 and the triode Q2, when the voltage regulator tube D2 is conducted, the temperature of the element is in a normal state, the voltage regulator tube D2 conducts the thyristor Q3 through the capacitor C1, the thyristor Q3 discharges the comparison signal to the ground through the capacitor C7 and the capacitor C2 to ensure the safety of the temperature detection circuit, when the triode Q2 is conducted, the triode Q2 generates a first high level, the first high level conducts the relay K1 through the diode D3 to further start a current calculation circuit and conduct a radiator simultaneously, the method comprises the steps of starting to perform heat dissipation treatment on elements in the construction distribution box, simultaneously transmitting a first high level to a current calculation circuit for processing, starting the current calculation circuit, transmitting a current signal to an operational amplifier U2B in two paths, performing subtraction operation on the two paths of current signals by the operational amplifier U2B to obtain a difference signal, performing zero-crossing comparison on the difference signal by using the operational amplifier U1B to detect whether the difference signal is a positive value or a negative value, thereby knowing whether the current of the elements is increased, when the operational amplifier U1B cannot conduct a diode D4, indicating that the current of the elements is not increased when the current of the elements works, at the moment, the elements are in a safe state, when the operational amplifier U1B conducts a diode D4, indicating that the current of the elements is increased when the elements work, and having a risk of short circuit, at the moment, outputting a second high level by a diode D4 to open a sudden stop power supply of the construction distribution box, the first high level and the second high level output by the temperature detection circuit conduct an AND gate formed by a diode D5, a diode D6 and a resistor R11, so that the first high level and the second high level are subjected to AND operation, an alarm signal is output, the alarm signal is output to a monitoring center, and a worker is reminded that the construction distribution box is in an unsafe state and needs to be immediately maintained.
The utility model realizes the following beneficial effects:
(1) the current calculating circuit is arranged on the basis of the temperature detecting circuit arranged in the prior art, whether the element in the construction distribution box has the risk of short circuit or not is judged when the temperature of the element in the construction distribution box is detected to rise, and the construction distribution box stops supplying power when the risk of short circuit is detected, so that the safety of the construction distribution box is protected, an alarm signal is output to a monitoring center, a worker is reminded that the construction distribution box is in an unsafe state, the frequency of stopping the construction distribution box is reduced, and the problem that the construction distribution box in the prior art frequently stops supplying power when summer to influence the progress of construction and the safety of workers is solved.
(2) Carry out subtraction operation to current signal setting fortune ware U2B in current calculation circuit to obtain the difference signal, and carry out zero crossing judgement to the difference signal, and then detect out the difference signal and be positive value or negative value, thereby learn whether the electric current of component increases, have or not to take place the risk of short circuit, temperature-detecting circuit in addition has realized carrying out accurate control to the state of component and construction block terminal, has guaranteed the safety of construction block terminal.
Claims (5)
1. The utility model provides a construction safety block terminal, its characterized in that, construction safety block terminal includes temperature-detecting circuit, electric current calculation circuit, temperature-detecting circuit utilizes thermistor PTCR to detect the temperature signal of construction block terminal inner member to produce comparison signal and first high level after comparing the temperature signal, comparison signal opens electric current calculation circuit, and transmits the high level to electric current calculation circuit simultaneously, electric current calculation circuit calculates the electric current signal on the construction block terminal inner member, thereby produces difference signal, and utilizes first high level to produce alarm signal, alarm signal transmission to the surveillance center.
2. The construction safety distribution box according to claim 1, wherein the temperature detection circuit detects temperature signals of components in the distribution box by using a thermistor PTCR, compares the temperature signals, generates a comparison signal, and generates a first high level after judgment by using the comparison signal, and the first high level turns on the current calculation circuit and transmits the first high level to the current calculation circuit.
3. The construction safety distribution box according to claim 2, wherein the temperature detection circuit comprises a diode D1, the anode of the diode D1 is connected to one end of a resistor R1 and one end of a hot rice weaning IPTCR, the cathode of the diode D1 is connected to one end of a resistor R3 and the base of a transistor Q1, the collector of the transistor Q1 is connected to the other end of a resistor R3, the other end of the resistor R1, one end of a resistor R5, one end of a resistor R8, the emitter of a transistor Q2 is connected to a positive power VCC, the emitter of the transistor Q1 is connected to one end of a resistor R2 and one end of a resistor R4, the other end of the resistor R4 is connected to the inverting terminal of an operational amplifier U3B, the inverting terminal of the operational amplifier U3B is connected to the other end of a resistor R5, the output terminal of the operational amplifier U3B is connected to the other end of the resistor R8, the base of a transistor Q2 and the positive terminal of a voltage regulator D2, the collector of the triode Q2 is connected with the anode of the diode D3, the radiator and one end of the resistor R6 respectively, the cathode of the diode D3 is connected with one end of the relay K1, the cathode of the voltage-regulator tube D2 is connected with the control electrode of the thyristor Q3, one end of the capacitor C1 and the anode of the thyristor Q3 respectively, the cathode of the thyristor Q3 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the other end of the capacitor C1, the other end of the resistor R6, the other end of the relay K1, the other end of the resistor R2 and the other end of the thermistor PTCR in parallel connection.
4. The construction safety distribution box according to claim 1, wherein the current calculating circuit is turned on by a high level output from the temperature detecting circuit, subtracts the current signal from the element to generate a difference signal, obtains a second high level using the difference signal, outputs the second high level to the mobile phone, and outputs an alarm signal to the monitoring center after performing an and operation on the second high level and the first high level.
5. The construction safety distribution box according to claim 4, wherein the current calculating circuit comprises a switch S1, one end of the switch S1 is connected with a current signal, the other end of the switch S1 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with one end of a resistor R9, one end of a resistor R13 and the same-phase end of an operational amplifier U2B, the reverse-phase end of the operational amplifier U2B is connected with one end of a capacitor C2, the other end of the resistor R13 and one end of a resistor R10, the output end of the operational amplifier U2B is connected with the other end of a resistor R10 and the reverse-phase end of an operational amplifier U1B, the output end of the operational amplifier U1B is connected with the anode of a diode D4, the cathode of the diode D4 is connected with a mobile phone and the cathode of a diode D6, the anode of a diode D6 is connected with the anode of a diode D5, one end of a resistor R11 and a monitoring center, and the other end of the resistor R11 is connected with one end of a temperature detecting circuit R8, An emitter of the triode Q2 is connected with a positive power supply VCC, a cathode of the diode D5 is respectively connected with an anode of a diode D3 in the temperature detection circuit and one end of a resistor R6, and a non-inverting end of the operational amplifier U1B is respectively connected with the other end of a resistor R9, the other end of a capacitor C2 and the other end of a resistor R6 in the temperature detection circuit and is connected with the ground in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122948726.6U CN216289545U (en) | 2021-11-29 | 2021-11-29 | Construction safety block terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122948726.6U CN216289545U (en) | 2021-11-29 | 2021-11-29 | Construction safety block terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216289545U true CN216289545U (en) | 2022-04-12 |
Family
ID=81039119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122948726.6U Active CN216289545U (en) | 2021-11-29 | 2021-11-29 | Construction safety block terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216289545U (en) |
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2021
- 2021-11-29 CN CN202122948726.6U patent/CN216289545U/en active Active
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