CN218352161U - Overheat protector for electric heater - Google Patents
Overheat protector for electric heater Download PDFInfo
- Publication number
- CN218352161U CN218352161U CN202221667274.2U CN202221667274U CN218352161U CN 218352161 U CN218352161 U CN 218352161U CN 202221667274 U CN202221667274 U CN 202221667274U CN 218352161 U CN218352161 U CN 218352161U
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- electric heater
- temperature
- thyristor
- control part
- temperature control
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Abstract
The utility model relates to an electric heater technical field discloses an electric heater overheat protection device, including electric heater, electric heater installs thyristor and pulse trigger unit outward, pulse trigger unit with the thyristor is connected, the thyristor with electric heater connects, first temperature control part is installed to electric heater's exit position, first temperature control part with pulse trigger unit connects, electric heater is inside still to install second temperature control part and to be used for cutting off the ac contactor of the power of thyristor, second temperature control part with ac contactor connects. The device adds a layer of protection on the original control loop, and can reflect the temperature of the electric heater more timely and reliably, thereby more effectively protecting the electric heater and really achieving the intrinsic safety of equipment.
Description
Technical Field
The utility model relates to an overheat protection device, in particular to electric heater overheat protection device.
Background
In the traditional process flow, process gas enters from the top of an electric heater and exits from the bottom, a process gas temperature sensor is arranged at the outlet of the electric heater, the temperature sensor transmits a process gas temperature signal at the outlet of the electric heater to a temperature controller, and the temperature controller controls the electric heater to heat. If the process gas flow is not enough or when there is no flow, the temperature sensor can not accurately reflect the temperature in the electric heater, and if the electric heater is still continuously heated, the electric heating rod is in dry burning, and finally the internal temperature is too high, and the electric heating rod is burned out.
Disclosure of Invention
Therefore, the utility model provides an electric heater overheat protection device for solve above-mentioned technical problem.
The technical scheme of the utility model is realized like this:
the utility model provides an electric heater overheat protection device, including electric heater, electric heater installs thyristor and pulse trigger unit outward, pulse trigger unit with the thyristor is connected, the thyristor with electric heater connects, first temperature control part is installed to electric heater's exit position, first temperature control part with pulse trigger unit connects, electric heater is inside still to install second temperature control part and to be used for cutting off the ac contactor of the power of thyristor, second temperature control part with ac contactor connects.
Preferably, the first temperature control component includes a first temperature sensor and a first temperature controller, the first temperature sensor is connected with the first temperature controller, and the first temperature controller is connected with the pulse trigger unit.
Preferably, the second temperature control part includes a second temperature sensor and a second temperature controller, the second temperature sensor is installed inside the electric heater, the second temperature sensor is connected with the second temperature controller, and the second temperature controller is connected with the ac contactor.
Preferably, the temperature control device further comprises an upper computer, and the second temperature controller is connected with the upper computer.
Preferably, the temperature controller also comprises an audible and visual alarm, and the second temperature controller is connected with the audible and visual alarm.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an electric heater overheat protection device, when first control by temperature change part detects the temperature and reachs the specified value, can close the thyristor through pulse trigger signal to stop electric heater, nevertheless if electric heater does not stop, when second control by temperature change part detects the temperature and reachs the setting value, will directly cut off the power of thyristor through ac contactor, realize protecting electric heater's function. The second temperature control component is arranged in the electric heater, can reflect the temperature of the electric heater more timely and reliably than the first temperature control component, protects the electric heater more effectively, and really achieves the intrinsic safety of equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of a connection structure of an overheat protection device for an electric heater according to the present invention.
In the figure, 1 electric heater, 2 thyristors, 3 pulse trigger units, 4 first temperature sensors, 5 first temperature controllers, 6 second temperature sensors, 7 second temperature controllers, 8 alternating current contactors, 9 upper computers, 10 audible and visual alarms and 11 independent power supplies.
Detailed Description
In order to better understand the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1, the utility model provides an electric heater overheat protection device, including electric heater 1, electric heater 1 installs thyristor 2 and pulse trigger unit 3 outward, thyristor 2 has outer power supply 11, and power 11 is the power supply of thyristor 2, pulse trigger unit 3 with thyristor 2 connects, thyristor 2 with electric heater 1 connects, first temperature control part is installed to electric heater 1's exit position, first temperature control part with pulse trigger unit 3 connects, electric heater 1 is inside still to be installed the second temperature control part and to be used for cutting off thyristor 2's power 11's ac contactor 8, ac contactor 8 installs between thyristor 2 and power 11 for cut off or switch on power 11, the second temperature control part with ac contactor 8 connects.
The first temperature control component is arranged at the outlet of the electric heater 1, and transmits a process gas temperature signal at the outlet of the electric heater 1 to the pulse trigger unit 3, so that the thyristor 2 is controlled to output a voltage for heating the electric heater 1. The temperature is 170 ℃ when the process air temperature is heated normally, the first temperature control part can close the thyristor through a pulse trigger signal when the temperature reaches 200 ℃, so that the electric heater 1 is stopped, and if the electric heater 1 is not stopped, the power supply 11 of the thyristor 2 is directly cut off through the alternating current contactor when the second temperature control part reaches the set value of the temperature controller, so that the function of protecting the electric heater 1 is realized. The second temperature control part is arranged inside the electric heater 1, and can reflect the temperature of the electric heater 1 more timely and reliably than the first temperature control part, and the device adds a layer of protection on the original control loop, thereby more effectively protecting the electric heater 1 and really achieving the intrinsic safety of the equipment.
The first temperature control component comprises a first temperature sensor 4 and a first temperature controller 5, the first temperature sensor 4 is connected with the first temperature controller 5, the first temperature controller 5 is connected with the pulse trigger unit 3, the first temperature sensor 4 transmits a process gas temperature signal at the outlet of the electric heater 1 to the first temperature controller 5, and the first temperature controller 5 outputs the signal to the pulse trigger unit 3 so as to control the thyristor 2 to output the voltage for heating the electric heater 1.
The second temperature control part comprises a second temperature sensor 6 and a second temperature controller 7, the second temperature sensor 6 is installed inside the electric heater 1, the second temperature sensor 6 is connected with the second temperature controller 7, the second temperature controller 7 is connected with the alternating current contactor 8, when the temperature detected by the second temperature sensor 6 reaches a specific value, the second temperature controller 7 transmits a signal to the alternating current contactor 8, and the alternating current contactor 8 cuts off a power supply 11 of the thyristor 2, so that the function of protecting the electric heater 1 is realized.
Still include host computer 9, second temperature controller 7 with host computer 9 is connected, and when second temperature controller 7 during operation, can learn the circumstances such as the technology airflow is not enough or no flow through the warning suggestion of host computer 9 with signal transmission to the host computer 9 that is equipped with overtemperature warning, staff, and be convenient for in time handle.
Still include audible-visual annunciator 10, second temperature controller 7 with audible-visual annunciator 10 is connected, and when staff's attention was not on host computer 9, it was not obvious to rely on the warning suggestion of host computer 9 alone, and the scene can not in time discover and emergency response during the warning, can remind the staff in the very first time through the strong alarm sound that audible-visual annunciator 10 sent.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an electric heater overheat protection device, includes electric heater, electric heater installs thyristor and pulse trigger unit outward, pulse trigger unit with the thyristor is connected, the thyristor with electric heater connects, its characterized in that, electric heater's export position installs first temperature control part, first temperature control part with pulse trigger unit connects, inside second temperature control part of still installing of electric heater and being used for cutting off the ac contactor of thyristor power supply, second temperature control part with ac contactor connects.
2. The overheat protection device for an electric heater as claimed in claim 1, wherein the first temperature control means comprises a first temperature sensor and a first temperature controller, the first temperature sensor is connected to the first temperature controller, and the first temperature controller is connected to the pulse trigger unit.
3. The over-temperature protection device for the electric heater of claim 1, wherein the second temperature control member comprises a second temperature sensor and a second temperature controller, the second temperature sensor is installed inside the electric heater, the second temperature sensor is connected with the second temperature controller, and the second temperature controller is connected with the ac contactor.
4. The electric heater overheat protection device according to claim 3, further comprising an upper computer, wherein the second temperature controller is connected to the upper computer.
5. The electric heater over-temperature protection device of claim 3, further comprising an audible and visual alarm, wherein the second temperature controller is connected to the audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221667274.2U CN218352161U (en) | 2022-06-30 | 2022-06-30 | Overheat protector for electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221667274.2U CN218352161U (en) | 2022-06-30 | 2022-06-30 | Overheat protector for electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218352161U true CN218352161U (en) | 2023-01-20 |
Family
ID=84911760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221667274.2U Active CN218352161U (en) | 2022-06-30 | 2022-06-30 | Overheat protector for electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218352161U (en) |
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2022
- 2022-06-30 CN CN202221667274.2U patent/CN218352161U/en active Active
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