Burnout-proof device for calcination assembly of vacuum furnace for spinning

Abstract

The utility model discloses an anti-burnout device for a calcination component of a vacuum furnace for spinning, which comprises a sensor, a temperature sensor and a temperature sensor, the controller is electrically connected with the sensor; the contactor is electrically connected with the controller; the solid-state relay is electrically connected with the contactor and the controller respectively; the control end of the heating element is electrically connected with the solid-state relay; a solid-state relay is connected in series between a contactor and a heating element, and the solid-state relay is electrically connected with a controller, so that hierarchical control over the heating element is achieved, starting and stopping operation of the heating element is achieved by controlling a switch of the contactor through the controller at low temperature, and starting and stopping operation is achieved by controlling a switch of the solid-state relay through the controller at high temperature. Under the overtemperature condition, the controller controls double-control disconnection of the contactor and the solid-state relay to stop heating, and the problem that the contactor is prone to being burnt out and bonded under the high-temperature state, and then a heating element is burnt out is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of vacuum furnace calcination subassembly burnout prevention device for spinning, belong to a kind of spinning vacuum furnace calcination technical field. BACKGROUND

[0002] In the spinning process, the molten polymer will pass through the spinning melting component, after long-term use, polymer will accumulate on the surface and inside the component, affect the spinning quality. Therefore, it needs to be cleaned after the component runs for a period of time. At present, the cleaning of the spinning melting component is mainly carried out in the vacuum furnace, the spinning component is calcined by the vacuum furnace, and then it is cooled by spraying, so as to solve the problem of polymer attached to the component. The process includes adding the spinning component adhered with polyester high molecular compound into the vacuum furnace, heating to 300℃, keeping for 1 hour, then melting the polyester high molecular compound, cracking, and cracking at 300~500℃ for 5 hours, oxidizing for 3 hours, and finally cooling by water spraying. In the process of calcining the component, the controller controls the switch of the contactor, and then realizes the start-stop of the heating element. However, the applicant found that the heating element in the vacuum furnace often burns out in the actual production, and after repair, it is found that the contactor is easy to burn and stick in the frequent attraction operation, and then the heater is always in the heating state and burns out. SUMMARY

[0003] Based on the above, the utility model provides a kind of vacuum furnace calcination subassembly burnout prevention device for spinning to overcome the deficiencies of prior art.

[0004] The technical scheme of the utility model is: a kind of vacuum furnace calcination subassembly burnout prevention device for spinning, comprising:

[0005] Sensor, the sensor is used to detect temperature in vacuum furnace;

[0006] Controller, the controller is electrically connected with the sensor;

[0007] Contactor, the contactor is electrically connected with the controller;

[0008] Solid state relay, the solid state relay is electrically connected with the contactor and controller respectively;

[0009] Heating element, the control end of the heating element is electrically connected with the solid state relay, the heating element is the component in vacuum furnace, for heating vacuum furnace.

[0010] In one of the examples, the controller is a PLC controller.

[0011] In one of the examples, the heating element includes an electric heater or an electromagnetic heater.

[0012] The utility model discloses the beneficial effects: the utility model discloses a solid state relay is connected in series between contactor and heating element, and solid state relay is electrically connected with controller, and then can realize the grading control of heating element, and the start-stop operation of heating element is realized through the switch of contactor under the control of controller in low temperature, and the start-stop operation of heating element is realized through the switch of solid state relay under the control of controller in high temperature, and the heating of heating element is realized through the double -control disconnection of contactor and solid state relay under the control of controller in overtemperature, effectively avoid the contactor in high temperature state and easily burn the adhesion, and then make heating element burnout problem, and the safety also can improve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is control principle diagram for spinning vacuum furnace calcination subassembly burnout prevention device;

[0014] Reference signs explanation:

[0015] 1 sensor, 2 controller, 3 contactor, 4 solid state relay, 5 heating element. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is explained in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from the description, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the following disclosed specific implementation.

[0017] Please refer to Figure 1 , the embodiment of the utility model is a spinning vacuum furnace calcination subassembly burnout prevention device, including sensor 1, controller 2, contactor 3, solid state relay 4 and heating element 5. Sensor 1 is a temperature probe, which is installed in a vacuum furnace, is an existing structure, and is used to detect the temperature in the vacuum furnace as a subsequent control basis. Controller 2 is a PLC controller, which is electrically connected with sensor 1, and is used to receive the temperature value detected by sensor 1. Contactor 3 is electrically connected with controller 2, and is used to receive the command of controller 2 and execute the switching operation of the circuit. Solid state relay 4 is electrically connected with contactor 3 and controller 2 respectively, can directly control the switch of solid state relay 4 through controller 2, and then realize the switching operation of the circuit, and solid state relay 4 can also be connected in series with contactor 3. Heating element 5 is a component in the vacuum furnace, which is used to heat the vacuum furnace, and can be an electric heater or an electromagnetic heater, etc. The control end of heating element 5 is electrically connected with solid state relay 4, and can realize heating start and stop operation according to the line section.

[0018] The working principle of the anti-burn device of the vacuum furnace calcination assembly for spinning is as follows:

[0019] In the high-temperature cleaning process of the spinning melting assembly, when the sensor 1 detects that the furnace body is in the set low-temperature state (lower than the lower limit of the calcination temperature), the solid-state relay 4 remains in the closed state, at this time, the start-stop operation of the heating element 5 is realized by the controller 2 controlling the switch of the contactor 3; when the sensor 1 detects that the furnace body is in the set high-temperature state (in the calcination temperature range), the start-stop operation of the heating element 5 is realized by the controller 2 controlling the switch of the solid-state relay 4; when the sensor 1 detects that the furnace body is in the set over-temperature state (higher than the upper limit of the calcination temperature), the heating element 5 is stopped by the controller 2 controlling the double control of the contactor 3 and the solid-state relay 4. Compared with the prior art, the solid-state relay 4 is connected in series between the contactor 3 and the heating element 5, and the solid-state relay 4 is electrically connected with the controller 2, so that the hierarchical control of the heating element 5 can be realized, and the problem of the heating element 5 being burned is effectively avoided. At the same time, under the over-temperature state, the double control of the contactor 3 and the solid-state relay 4 is controlled to stop, so that the heating element 5 is in the stopped heating state, and the safety is improved.

[0020] The above-described embodiments only express several embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A device for preventing burnout of a calcination assembly of a vacuum furnace for spinning, characterized in that, Comprising: a sensor (1) for detecting temperature in a vacuum furnace; a controller (2) electrically connected with the sensor (1); a contactor (3) electrically connected with the controller (2); a solid state relay (4) electrically connected with the contactor (3) and controller (2) respectively; a heating element (5) having a control end electrically connected with the solid state relay (4), the heating element (5) being a component in the vacuum furnace for heating the vacuum furnace.

2. The vacuum furnace calcining assembly anti-burn-out device for spinning as claimed in claim 1, wherein, The controller (2) is a PLC controller.

3. The vacuum furnace calcining assembly anti-burn-out device for spinning as claimed in claim 1, wherein, The heating element (5) comprises an electric heater or an electromagnetic heater.

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