CN214253038U - Temperature and humidity control device of steam box - Google Patents
Temperature and humidity control device of steam box Download PDFInfo
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- CN214253038U CN214253038U CN202120285636.0U CN202120285636U CN214253038U CN 214253038 U CN214253038 U CN 214253038U CN 202120285636 U CN202120285636 U CN 202120285636U CN 214253038 U CN214253038 U CN 214253038U
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Abstract
The utility model relates to a temperature and humidity control device of a steam box, which is characterized by comprising a temperature and humidity program controller, a temperature and humidity display screen, a temperature sensor, a humidity sensor, an electrical control circuit and a protection device; the temperature and humidity program controller is respectively connected with the temperature and humidity display screen, the temperature sensor and the humidity sensor, and the temperature sensor and the humidity sensor are used for acquiring the temperature and the humidity in the steam box; temperature humidity program controller still passes through electric control circuit connects protection device and steam ager's heater, steam humidifier, circulating fan and steam exhaust device, the utility model discloses can wide application in the steam ager.
Description
Technical Field
The utility model relates to a temperature and humidity control device, especially about a temperature and humidity control device of steam ager.
Background
The production and manufacturing process of certain products needs to be carried out under specific temperature and humidity environments to achieve certain physicochemical characteristics thereof. At present, the processing mode in the prior art is generally to place the sample in a steam box, so that the sample changes the physicochemical characteristics through the temperature and the humidity of steam in a closed space. However, the traditional steam box has poor control precision on temperature and humidity, low product quality, low efficiency and poor effect.
Disclosure of Invention
To the problem, the utility model aims at providing a temperature and humidity control device to steam ager that atmospheric control precision is high.
In order to achieve the purpose, the utility model adopts the following technical proposal: a temperature and humidity control device of a steam box comprises a temperature and humidity program controller, a temperature and humidity display screen, a temperature sensor, a humidity sensor, an electric control circuit and a protection device;
the temperature and humidity program controller is respectively connected with the temperature and humidity display screen, the temperature sensor and the humidity sensor, and the temperature sensor and the humidity sensor are used for acquiring the temperature and the humidity in the steam box;
the temperature and humidity program controller is also connected with the protection device and a heater, a steam humidifier, a circulating fan and a steam exhaust device of the steam box through the electric control circuit.
Preferably, the temperature and humidity display screen is arranged at a control cabinet door outside the steam box, the temperature sensor and the humidity sensor are arranged in the steam box, and the temperature and humidity program controller, the electric control circuit and the protection device are all arranged in the control cabinet outside the steam box.
Preferably, the operation modes of the steam box comprise a program operation mode and a fixed value operation mode.
Preferably, a first signal input terminal and a second signal input terminal of the humiture program controller are connected to the temperature sensor, and a third signal input terminal and a fourth signal input terminal of the humiture program controller are connected to the humidity sensor.
Preferably, the protection device comprises an overtemperature instrument alarm point, first to second stainless steel float switches, a temperature and humidity program controller fault alarm, a humidifier overtemperature alarm and an acousto-optic alarm lamp, wherein the electrical control circuit comprises a switching power supply, an air circuit breaker, first to second fuses, a self-locking button switch, an exhaust device switch, first to twelfth intermediate relays, a power-off delay relay, a time relay, first to second humidifier pressure relief electric valve turn-on and turn-off coils and first to third alternating current contactors;
the power supply input ends of the temperature and humidity display screen and the temperature and humidity program controller are respectively connected with the output end of the switch power supply; one end of the first fuse and one end of the second fuse are connected in parallel to one another through the air circuit breaker.
The other end of the first fuse is connected with a live wire end of the switching power supply, a first output control switch and a second output control switch of the temperature and humidity program controller in parallel through the self-locking button switch, an overtemperature instrument of the steam box, an alarm point of the overtemperature instrument, a fault alarm of the temperature and humidity program controller, an overtemperature alarm of the humidifier, a normally closed contact of the first intermediate relay, the first stainless steel float switch and the second stainless steel float switch, a third output control switch of the temperature and humidity program controller, two interlocked contacts of the exhaust device switch, a normally open contact of the second intermediate relay, two groups of normally open contacts and normally closed contacts of the third intermediate relay, normally open contacts of the fourth intermediate relay, the fifth intermediate relay and the sixth intermediate relay, and one end of a power-off delay break contact of the power-off delay relay;
the other end of the first output control switch is connected with one end of the seventh intermediate relay working coil; the other end of the second output control switch is connected with one end of the working coil of the third intermediate relay; the other end of the over-temperature instrument alarm point is connected with one end of the eighth intermediate relay working coil; the other end of the normally closed contact of the first intermediate relay is connected with one end of a water pump of the steam box; the other end of the first stainless steel float switch is connected with one end of the first intermediate relay working coil; the other end of the stainless steel float switch is connected with one end of the ninth intermediate relay working coil; the other end of the third output control switch is connected with one end of the second intermediate relay and one end of the time relay working coil in parallel; the other end of a linkage contact of the exhaust device switch is connected with one end of the fourth intermediate relay working coil through the other normally open contact of the second intermediate relay, and the other end of the other linkage contact of the exhaust device switch is connected with one end of the fifth intermediate relay working coil; the other end of the temperature and humidity program controller fault alarm is connected with one end of the tenth intermediate relay working coil; the other end of the normally open contact of the second intermediate relay is connected with one end of the acousto-optic alarm lamp through the normally closed contact of the time relay; the other end of the humidifier overtemperature alarm is connected with one end of the eleventh intermediate relay working coil; the other end of one group of normally open contacts of the third intermediate relay is connected with the turn-on coil of the turn-on and turn-off coil of the first humidifier electric butterfly valve, the other end of one group of normally closed contacts of the third intermediate relay is connected with the turn-off coil of the turn-on and turn-off coil of the first humidifier electric butterfly valve, the other end of the other group of normally open contacts of the third intermediate relay is connected with the turn-off coil of the turn-on and turn-off coil of the second humidifier electric butterfly valve, and the other end of the other group of normally closed contacts of the third intermediate relay is connected with the turn-on coil of the turn-on and turn-off coil of the second humidifier electric butterfly valve; the other ends of the normally open contacts of the fourth intermediate relay and the fifth intermediate relay are both connected with one end of the working coil of the first alternating current contactor, the other end of the power-off delay relay is connected with one end of the working coil of the sixth intermediate relay, and the other end of the normally open contact of the sixth intermediate relay is connected with one end of a circulating fan of a steam box;
the other end of the second fuse is connected in parallel with the normally closed contacts of the ninth intermediate relay and the sixth intermediate relay, the working coil of the power-off delay relay and one ends of the normally open contacts of the third intermediate relay and the twelfth intermediate relay through the normally open contact of the seventh intermediate relay and the normally closed contact of the tenth intermediate relay; the other end of the ninth intermediate relay normally closed contact is connected with one end of the twelfth intermediate relay working coil through the normally closed contact of the third intermediate relay, the other end of the sixth intermediate relay normally open contact is connected with one end of the second alternating current contactor working coil through the normally closed contact of the eighth intermediate relay, and the other ends of the third intermediate relay normally open contact and the twelfth intermediate relay normally open contact are connected with one end of the third alternating current contactor working coil through the normally closed contacts of the ninth intermediate relay and the eleventh intermediate relay;
the power supply comprises a switch power supply, a first to a twelfth intermediate relays, a power-off delay relay, a time relay, working coils of a first to a third alternating current contactors, a public end of a first humidifier electric butterfly valve turn-on and turn-off coil and a second humidifier pressure relief electric valve turn-on and turn-off coil, and the other ends of the overtemperature instrument, the water pump, the sound and light alarm lamp and the circulating fan are connected with a zero line of the working power supply.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. for reaching fine atmospheric control effect, the utility model discloses increase the controlling means and corresponding electric control circuit of a constant temperature and humidity on original steam ager, change former steam ager atmospheric control precision poor, inefficiency and product quality low grade shortcoming, can realize the accurate control to sample humiture in the steam ager, satisfied the needs of production and product.
2. The utility model discloses owing to be provided with temperature sensor and humidity transducer and humiture program controller, can rely on the signal of temperature sensor and humidity transducer transmission in the steam ager, through humiture program controller's closed-loop control, including program operation and definite value operation two kinds of modes for the steam ager can be stabilized at the humiture value that technology needs, and adapt to different demands.
3. The utility model discloses owing to be provided with protection device, in case detect corresponding alarm signal, the system then can report to the police and send corresponding control command to the safety of protection person, equipment and work piece can wide application in the steam box.
Drawings
Fig. 1 is an electrical schematic diagram according to an embodiment of the present invention.
The names of the components denoted by the respective reference numerals in the drawings are as follows:
1-temperature and humidity display screen; 2-humidity program controller; 3-an electrical control circuit;
a T-switch power supply; QF-air circuit breaker; FU1 — first fuse; FU2 — second fuse; SB 1-self-locking button switch; SB2 — exhaust switch; KA1 — first intermediate relay; KA 2-second intermediate relay; KA 3-third intermediate relay; KA 4-fourth intermediate relay; KA 5-fifth intermediate relay; KA 6-sixth intermediate relay; KA 7-seventh intermediate relay; KA 8-eighth intermediate relay; KA 9-ninth intermediate relay; KA 10-tenth intermediate relay; KA 11-eleventh intermediate relay; KA 12-twelfth intermediate relay; KT 1-power-off delay relay; KT 2-time relay; SV 1-opening and closing coil of pressure relief electric valve of first humidifier; SV 2-opening and closing coil of pressure relief electric valve of second humidifier; KM 1-first AC contactor; KM 2-second ac contactor; KM 3-third ac contactor;
AL-alarm point of overtemperature gauge; 0V 1-first stainless steel float switch; 0V 2-second stainless steel float switch; q4-temperature and humidity program controller failure alarm; WK 1-humidifier overtemperature alarm; FM-acousto-optic warning lights;
l1 — one of the three phases of the working power supply; n-zero line of working power supply; l-the live wire end of the switching power supply; YB-overtemperature gauge of the steam box; a water pump of the MP-steam box; a circulating fan of the MF-steam box; q1-a first output control switch of the temperature and humidity program controller; q2-a second output control switch of the temperature and humidity program controller; q3-third output control switch of temperature and humidity program controller;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. It is to be understood, however, that the drawings are provided for a better understanding of the invention and that they are not to be interpreted as limiting the invention. In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The steam box in the prior art is generally provided with a heater, a heat preservation shell, a circulating fan, a steam exhaust device, an electrical control system and the like. The steam box is a heat-insulating shell, the upper part of the steam box is provided with a circulating fan, and the lower part of the steam box is provided with a heater. The steam box is provided with a pipeline communicated with the outside, and a valve is arranged on the pipeline to form a steam exhaust device together. The electric control system is assembled in the control box and is arranged on the steam box shell. The working principle of the steam box is as follows: the workpiece is placed in the steam box, the door is closed, the heating button is started, the heater is powered on to operate, the circulating fan is started to generate steam, and circulating steam is formed in the steam box under the action of the circulating fan to ensure that the workpiece is heated uniformly. After the heating time is finished according to the process requirements, a heating stop button is pressed, the heater is powered off to stop working, an operator opens a valve of the steam exhaust device, the circulating fan is closed for 5 minutes after delaying for a certain time, and the steam box door is opened to take out the workpiece after the circulating fan is stopped, so that the operation is finished.
As shown in fig. 1, the utility model provides a temperature and humidity control device of steam box includes temperature and humidity display screen 1, temperature and humidity program controller 2, electric control circuit 3, temperature sensor, humidity transducer and protection device.
Humiture display screen 1 sets up the position of the control cabinet door department outside the steam ager, the personnel's of being convenient for operation. Temperature sensor and humidity transducer all set up in the steam ager, and temperature sensor and humidity transducer are used for gathering the temperature and the humidity in the steam ager. Humiture display screen 1 is used for the operation mode of input steam ager and temperature, humidity, operating time, temperature slope value and humidity slope value isoparametric under this operation mode, and humiture display screen 1 still is used for showing temperature sensor and the temperature and the humidity that humidity transducer gathered.
The temperature and humidity program controller 2 and the electric control circuit 3 are arranged in a control cabinet outside the steam box, the temperature and humidity program controller 2 is respectively connected with the temperature and humidity display screen 1, the temperature sensor and the humidity sensor, the temperature and humidity program controller 2 is also connected with a heater of the steam box through the electric control circuit 3, the steam humidifier, the circulating fan and the steam exhaust device, the temperature and humidity program controller 2 is used for controlling the heater of the steam box, the steam humidifier, the circulating fan and the steam exhaust device to work correspondingly according to an input operation mode and parameters and the temperature and humidity acquired by the temperature sensor and the humidity sensor in real time, and the set temperature and humidity are achieved. The electric control circuit 3 is used for transmitting the instruction sent by the temperature and humidity program controller 2 to a heater, a steam humidifier, a circulating fan and an exhaust device of the steam box.
The protection device is arranged in a control cabinet outside the steam box and is connected with a temperature and humidity program controller 2 through an electric control circuit 3, the protection device is used for receiving fault signals such as a workpiece overtemperature protection signal, a water tank low liquid level alarm signal, a steam humidifier low water level alarm signal, a temperature and humidity program controller 2 fault signal and a steam humidifier overtemperature signal in the steam box and inputting the fault signals into the electric control circuit 3, and the temperature and humidity program controller 2 correspondingly stops the operation of a heater, a steam humidifier or a water pump of the steam box according to a preset logic according to the signals received by the protection device so as to protect the safety of equipment or the processing quality of workpieces.
In a preferred embodiment, the operation mode of the steam box comprises a program operation mode and a fixed value operation mode, and when the operation mode is the program operation mode, the temperature, the humidity and the operation time of each time period in the operation of the workpiece are set through the temperature and humidity display screen 1; when the operation mode is a constant value operation mode, a required temperature value, a required humidity value, a required timing operation time, a required temperature slope value and a required humidity slope value are set through the temperature and humidity display screen 1.
In a preferred embodiment, the first signal input terminal and the second signal input terminal of the humiture program controller 2 are connected with a temperature sensor, and the third signal input terminal and the fourth signal input terminal of the humiture program controller 2 are connected with a humidity sensor.
In a preferred embodiment, the protection device comprises an overtemperature instrument alarm point AL, first to second stainless steel float switches 0V1 to 0V2, a temperature and humidity program controller fault alarm Q4, a humidifier overtemperature alarm WK1 and an acousto-optic alarm lamp FM, wherein the first to second stainless steel float switches 0V1 to 0V2 are arranged in a water tank of the steam box. The electric control circuit 3 comprises a switch power supply T, an air circuit breaker QF, first to second fuses FU1 to FU2, a self-locking button switch SB1, an exhaust device switch SB2, first to twelfth intermediate relays KA1 to KA12, a power-off delay relay KT1, a time relay KT2, first to second humidifier pressure relief electric valve opening and closing coils SV1 to SV2 and first to third alternating current contactors KM1 to KM 3.
24V and 0V power supply input ends of the temperature and humidity display screen 1 and the temperature and humidity program controller 2 are respectively connected with 24V and 0V output ends of the switch power supply T. The L1 phase of the operating power is connected in parallel to one ends of the first fuse FU1 and the second fuse FU2 through the air circuit breaker QF.
The other end of the first fuse FU1 is connected in parallel with a live wire end L of a switch power supply T, a first output control switch Q1 of a temperature and humidity program controller 2, a second output control switch Q2 of the temperature and humidity program controller 2, an overtemperature instrument YB of a steam box, an overtemperature instrument alarm point AL, a normally closed contact of a first intermediate relay KA1, a first stainless steel float switch 0V1, a second stainless steel float switch 0V2 and a third output control switch Q3 of the temperature and humidity program controller 2 through a self-locking button switch SB1, two interlocking contacts of an exhaust device switch SB2, a temperature and humidity program controller fault alarm Q4, a normally open contact of a second intermediate relay KA2, a humidifier overtemperature alarm WK1, two groups of normally open contacts and normally closed contacts of a third intermediate relay KA3, a normally open contact of a fourth intermediate relay KA4, a normally open contact of a fifth intermediate relay KA5, a power-off delay opening contact of a power-off delay relay KT1 and one end of a normally open contact of a sixth intermediate relay KA 6.
The other end of a first output control switch Q1 of the temperature and humidity program controller 2 is connected with one end of a working coil of a seventh intermediate relay KA 7; the other end of a second output control switch Q2 of the temperature and humidity program controller 2 is connected with one end of a working coil of a third intermediate relay KA 3; the other end of the over-temperature instrument alarm point AL is connected with one end of a working coil of an eighth intermediate relay KA 8; the other end of the normally closed contact of the first intermediate relay KA1 is connected with one end of a water pump MP of the steam box; the other end of the first stainless steel float switch 0V1 is connected with one end of a first intermediate relay KA1 working coil; the other end of the stainless steel float switch 0V2 is connected with one end of a ninth intermediate relay KA9 working coil; the other end of a third output control switch Q3 of the temperature and humidity program controller 2 is connected in parallel with one end of a second intermediate relay KA2 working coil and a time relay KT2 working coil; the other end of a linkage contact of the exhaust device switch SB2 is connected with one end of a working coil of the fourth intermediate relay KA4 through the other normally open contact of the second intermediate relay KA2, and the other end of the other linkage contact of the exhaust device switch SB2 is connected with one end of a working coil of the fifth intermediate relay KA 5; the other end of the temperature and humidity program controller fault alarm Q4 is connected with one end of a tenth intermediate relay KA10 working coil; the other end of the normally open contact of the second intermediate relay KA2 is connected with one end of an acousto-optic alarm lamp FM through the normally closed contact of a time relay KT 2; the other end of the humidifier over-temperature alarm WK1 is connected with one end of an eleventh intermediate relay KA11 working coil; the other end of one group of normally open contacts of the third intermediate relay KA3 is connected with an opening coil of a first humidifier electric butterfly valve opening and closing coil SV1, the other end of one group of normally closed contacts of the third intermediate relay KA3 is connected with a closing coil of a first humidifier electric butterfly valve opening and closing coil SV1, the other end of the other group of normally open contacts of the third intermediate relay KA3 is connected with a closing coil of a second humidifier electric butterfly valve opening and closing coil SV1, and the other end of the other group of normally closed contacts of the third intermediate relay KA3 is connected with an opening coil of a second humidifier electric butterfly valve opening and closing coil SV 2; the other end of the normally open contact of the fourth intermediate relay KA4 and the other end of the normally open contact of the fifth intermediate relay KA5 are both connected with one end of a working coil of the first alternating current contactor KM1, the other end of the power-off delay relay KT1 is connected with one end of a working coil of the sixth intermediate relay KA6, and the other end of the normally open contact of the sixth intermediate relay KA6 is connected with one end of a circulating fan MF of the steam box.
The other end of the second fuse FU2 is connected in parallel with one end of a ninth intermediate relay KA9 normally closed contact, a sixth intermediate relay KA6 normally closed contact, a power-off time-delay relay KT1 working coil, a third intermediate relay KA3 normally open contact and a twelfth intermediate relay KA12 normally open contact through a normally open contact of a seventh intermediate relay KA7 and a normally closed contact of a tenth intermediate relay KA 10. The other end of the ninth intermediate relay KA9 normally closed contact is connected with one end of a twelfth intermediate relay KA12 working coil through the normally closed contact of a third intermediate relay KA3, the other end of the sixth intermediate relay KA6 normally open contact is connected with one end of a second alternating current contactor KM2 working coil through the normally closed contact of an eighth intermediate relay KA8, and the other ends of the third intermediate relay KA3 normally open contact and the twelfth intermediate relay KA12 normally open contact are connected with one end of a third alternating current contactor KM3 working coil through the normally closed contacts of a ninth intermediate relay KA9 and an eleventh intermediate relay KA 11.
A zero line end N of a switch power supply T, a seventh intermediate relay KA7 working coil, a third intermediate relay KA3 working coil, an overtemperature instrument YB, an eighth intermediate relay KA8 working coil, a water pump MP, a first intermediate relay KA1 working coil, a ninth intermediate relay KA9 working coil, a second intermediate relay KA2 working coil, a time relay KT2 working coil, a fourth intermediate relay KA4 working coil, a fifth intermediate relay KA5 working coil, a tenth intermediate relay KA10 working coil, an acousto-optic alarm lamp FM, an eleventh intermediate relay KA11 working coil, a common end of a first humidifier electric butterfly valve opening and closing coil SV1, a common end of a second humidifier pressure relief electric valve opening and closing coil SV2, a first alternating current contactor KM1 working coil, a sixth intermediate relay KA6 working coil, a circulating fan, a twelfth intermediate relay KA12 working coil, a working coil, The other ends of the working coil of the second alternating current contactor KM2, the working coil of the power-off delay relay KT1 and the working coil of the third alternating current contactor KM3 are all connected with a zero line N of a working power supply.
In a preferred embodiment, if the third intermediate relay KA3 is powered on and closed, the first humidifier pressure relief electric valve is powered on and off by the on coil of the off coil SV1, the first humidifier pressure relief electric valve is powered on and off by the off coil of the off coil SV1, meanwhile, the second humidifier pressure relief electric valve is powered on and off by the off coil of the off coil SV2, the second humidifier pressure relief electric valve is powered on and off by the on coil of the off coil SV2, and the steam humidifier works normally; on the contrary, if the third intermediate relay KA3 is powered off and disconnected, the first humidifier pressure relief electric valve is connected with the turn-off coil of the turn-off coil SV1, the first humidifier pressure relief electric valve is connected with the turn-on coil of the turn-off coil SV1 and disconnected, meanwhile, the second humidifier pressure relief electric valve is connected with the turn-on coil of the turn-off coil SV2, the second humidifier pressure relief electric valve is connected with the turn-off coil of the turn-off coil SV2 and disconnected, the steam humidifier stops working, the system starts to relieve pressure and prepares for taking out a workpiece.
The following detailed description of the specific embodiments illustrates the use of the temperature and humidity control device of the steam box of the present invention:
1. the operation mode is a program operation mode
Firstly, an air circuit breaker QF is closed, a switching power supply T is switched on, a temperature and humidity program controller 2 and a temperature and humidity display screen 1 normally display, then an operation mode is selected as a program operation mode through the temperature and humidity display screen 1, and parameters such as temperature, humidity and operation time of a workpiece in each time period in operation are selected through the temperature and humidity display screen 1; then, starting the steam box, starting and stopping components of a heater, a steam humidifier, a circulating fan, a steam exhaust device and the like of the steam box according to the temperature and humidity requirements, and acquiring the temperature and the humidity in the steam box in real time by using a temperature sensor and a humidity sensor; secondly, according to the input operation mode and parameters and the temperature and humidity acquired by the temperature sensor and the humidity sensor in real time, the temperature and humidity program controller 2 controls all parts of the steam box to be stabilized at a set value according to the step number through the electric control circuit 3, after the operation time is finished, automatic exhaust is started, steam in the steam box is removed, the steam box door is opened, and the workpiece is taken out.
2. The operation mode is a constant value operation mode
Firstly, an air circuit breaker QF is closed, a switching power supply T is switched on, a temperature and humidity program controller 2 and a temperature and humidity display screen 1 normally display, then an operation mode is selected to be a constant value operation mode through the temperature and humidity display screen 1, and required parameters such as a temperature value, a humidity value, a constant operation time, a temperature slope value and a humidity slope value are selected through the temperature and humidity display screen 1; then, starting the steam box, starting and stopping components of a heater, a steam humidifier, a circulating fan, a steam exhaust device and the like of the steam box according to the temperature and humidity requirements, and acquiring the temperature and the humidity in the steam box in real time by using a temperature sensor and a humidity sensor; secondly, according to the input operation mode and parameters and the temperature and humidity acquired by the temperature sensor and the humidity sensor in real time, the temperature and humidity program controller 2 controls all parts of the steam box through the electric control circuit 3 to linearly adjust the temperature and the humidity of the steam box according to the set parameters and stabilize the temperature and the humidity at the set values, after the operation time is finished, automatic exhaust is started, steam in the steam box is removed, a steam box door is opened, and a workpiece is taken out.
3. The program operation mode and the constant value operation mode both operate according to the following logics, except that the output time points of the first to third output control switches Q1 to Q3 of the temperature and humidity program controller 2 and the fault alarm Q4 of the temperature and humidity program controller are different:
after the operation mode is selected, the temperature and humidity program controller 2 operates according to a set program, a first output control switch Q1 of the temperature and humidity program controller 2 is closed, a seventh intermediate relay KA7, a power-off delay relay KT1 and a sixth intermediate relay KA6 act, a circulating fan MF of the steam box is started, a water pump MP is electrified, system water of the steam box starts to circulate, a twelfth intermediate relay KA12 acts, a steam humidifier of the steam box starts to preheat, a second alternating current contactor KM2 acts, and a heater of the steam box is switched on to start heating; the temperature and humidity program controller 2 closes a second output control switch Q2 of the temperature and humidity program controller 2 according to a set program, and a third intermediate relay KA3 acts, so that a first humidifier pressure relief electric valve is switched on and switched off with a switching-on coil of a switching-off coil SV1, a first humidifier pressure relief electric valve is switched on and switched off with a switching-off coil of a switching-off coil SV1, meanwhile, a second humidifier pressure relief electric valve is switched on and switched off with a switching-off coil of a switching-off coil SV2, a second humidifier pressure relief electric valve is switched on and switched off with a switching-on coil of a switching-off coil SV2, internal circulation of a humidification system of the steam box is enabled, a third alternating current contactor KM3 acts, and the steam box performs a normal humidification process; according to the program heating that humiture program controller 2 set for, the humidification back that finishes, the third output control switch Q3 of closed humiture program controller 2, second auxiliary relay KA2, time relay KT2 and fourth auxiliary relay KA4 get electric action, first AC contactor KM1 and exhaust apparatus switch SB2 get electric closure, the exhaust apparatus operation of steam, reduce temperature and humidity in the steam box, after the time according to humiture program controller 2 settlement, exhaust apparatus stops, can take out the work piece.
4. If the steam ager is totally normal to go on according to above-mentioned operation order, for the system function of perfecting the steam ager, the quality of protective apparatus safety and work piece, the utility model discloses be provided with protection device, increase following protect function:
A) overtemperature protection of a workpiece: when the overtemperature meter YB of the steam box detects that the temperature in the steam box exceeds a preset steam box temperature threshold value, an overtemperature meter alarm point AL is closed, an eighth intermediate relay KA8 is powered on to act, the alternating current contactor KM1 is forced to be powered off, and a heater of the steam box stops running.
B) Low water level protection of a water tank: once the water tank of the steam box is lack of water, the first stainless steel float switch 0V1 in the water tank is closed, the first intermediate relay KA1 is powered on to act, the water pump MP of the steam box stops working, and the steam box stops working.
C) Low water level protection of the steam humidifier: once the steam humidifier of the steam box is lack of water, the second stainless steel float switch 0V2 in the water box is closed, the ninth intermediate relay KA9 is powered on to act, the twelfth intermediate relay KA12 and the third alternating current contactor KM3 are powered off, and the steam humidifier stops working.
D) And (4) system fault alarming: if the temperature and humidity program controller 2 is abnormal in operation, a fault alarm Q4 of the temperature and humidity program controller is closed, the tenth intermediate relay KA10 is powered on to act, meanwhile, the twelfth intermediate relay KA12, the second alternating current contactor KM2, the power-off delay relay KT1 and the third alternating current contactor KM3 are all powered off, and the steam box stops operating.
E) Overtemperature of the steam humidifier: when the temperature of the steam humidifier exceeds the preset temperature threshold of the steam humidifier, the over-temperature alarm WK1 of the humidifier is closed, the eleventh intermediate relay KA11 is powered on to act, the third alternating current contactor KM3 is powered off, and the steam humidifier stops running.
Above-mentioned each embodiment only is used for explaining the utility model discloses, wherein structure, connected mode and the preparation technology etc. of each part all can change to some extent, all are in the utility model discloses equal transform and improvement of going on technical scheme's the basis all should not exclude outside the protection scope of the utility model.
Claims (4)
1. A temperature and humidity control device of a steam box is characterized by comprising a temperature and humidity program controller, a temperature and humidity display screen, a temperature sensor, a humidity sensor, an electric control circuit and a protection device;
the temperature and humidity program controller is respectively connected with the temperature and humidity display screen, the temperature sensor and the humidity sensor, and the temperature sensor and the humidity sensor are used for acquiring the temperature and the humidity in the steam box;
the temperature and humidity program controller is also connected with the protection device and a heater, a steam humidifier, a circulating fan and a steam exhaust device of the steam box through the electric control circuit.
2. The temperature and humidity control device of the steam box according to claim 1, wherein the temperature and humidity display screen is disposed at a control cabinet door outside the steam box, the temperature sensor and the humidity sensor are disposed inside the steam box, and the temperature and humidity program controller, the electrical control circuit and the protection device are disposed inside the control cabinet outside the steam box.
3. The temperature and humidity control device of claim 1, wherein the first signal input terminal and the second signal input terminal of the temperature and humidity program controller are connected to the temperature sensor, and the third signal input terminal and the fourth signal input terminal of the temperature and humidity program controller are connected to the humidity sensor.
4. The temperature and humidity control device of a steam box according to claim 3, wherein the protection device comprises an over-temperature instrument alarm point, first to second stainless steel float switches, a temperature and humidity program controller fault alarm, a humidifier over-temperature alarm and an audible and visual alarm lamp, and the electrical control circuit comprises a switching power supply, an air circuit breaker, first to second fuses, a self-locking button switch, an exhaust device switch, first to twelfth intermediate relays, a power-off delay relay, a time relay, first to second humidifier pressure relief electric valve turn-on and turn-off coils and first to third AC contactors;
the power supply input ends of the temperature and humidity display screen and the temperature and humidity program controller are respectively connected with the output end of the switch power supply; one phase of the working power supply is connected in parallel with one ends of the first fuse and the second fuse through the air circuit breaker;
the other end of the first fuse is connected with a live wire end of the switching power supply, a first output control switch and a second output control switch of the temperature and humidity program controller in parallel through the self-locking button switch, an overtemperature instrument of the steam box, an alarm point of the overtemperature instrument, a fault alarm of the temperature and humidity program controller, an overtemperature alarm of the humidifier, a normally closed contact of the first intermediate relay, the first stainless steel float switch and the second stainless steel float switch, a third output control switch of the temperature and humidity program controller, two interlocked contacts of the exhaust device switch, a normally open contact of the second intermediate relay, two groups of normally open contacts and normally closed contacts of the third intermediate relay, normally open contacts of the fourth intermediate relay, the fifth intermediate relay and the sixth intermediate relay, and one end of a power-off delay break contact of the power-off delay relay;
the other end of the first output control switch is connected with one end of the seventh intermediate relay working coil; the other end of the second output control switch is connected with one end of the working coil of the third intermediate relay; the other end of the over-temperature instrument alarm point is connected with one end of the eighth intermediate relay working coil; the other end of the normally closed contact of the first intermediate relay is connected with one end of a water pump of the steam box; the other end of the first stainless steel float switch is connected with one end of the first intermediate relay working coil; the other end of the stainless steel float switch is connected with one end of the ninth intermediate relay working coil; the other end of the third output control switch is connected with one end of the second intermediate relay and one end of the time relay working coil in parallel; the other end of a linkage contact of the exhaust device switch is connected with one end of the fourth intermediate relay working coil through the other normally open contact of the second intermediate relay, and the other end of the other linkage contact of the exhaust device switch is connected with one end of the fifth intermediate relay working coil; the other end of the temperature and humidity program controller fault alarm is connected with one end of the tenth intermediate relay working coil; the other end of the normally open contact of the second intermediate relay is connected with one end of the acousto-optic alarm lamp through the normally closed contact of the time relay; the other end of the humidifier overtemperature alarm is connected with one end of the eleventh intermediate relay working coil; the other end of one group of normally open contacts of the third intermediate relay is connected with the turn-on coil of the turn-on and turn-off coil of the first humidifier electric butterfly valve, the other end of one group of normally closed contacts of the third intermediate relay is connected with the turn-off coil of the turn-on and turn-off coil of the first humidifier electric butterfly valve, the other end of the other group of normally open contacts of the third intermediate relay is connected with the turn-off coil of the turn-on and turn-off coil of the second humidifier electric butterfly valve, and the other end of the other group of normally closed contacts of the third intermediate relay is connected with the turn-on coil of the turn-on and turn-off coil of the second humidifier electric butterfly valve; the other ends of the normally open contacts of the fourth intermediate relay and the fifth intermediate relay are both connected with one end of the working coil of the first alternating current contactor, the other end of the power-off delay relay is connected with one end of the working coil of the sixth intermediate relay, and the other end of the normally open contact of the sixth intermediate relay is connected with one end of a circulating fan of a steam box;
the other end of the second fuse is connected in parallel with the normally closed contacts of the ninth intermediate relay and the sixth intermediate relay, the working coil of the power-off delay relay and one ends of the normally open contacts of the third intermediate relay and the twelfth intermediate relay through the normally open contact of the seventh intermediate relay and the normally closed contact of the tenth intermediate relay; the other end of the ninth intermediate relay normally closed contact is connected with one end of the twelfth intermediate relay working coil through the normally closed contact of the third intermediate relay, the other end of the sixth intermediate relay normally open contact is connected with one end of the second alternating current contactor working coil through the normally closed contact of the eighth intermediate relay, and the other ends of the third intermediate relay normally open contact and the twelfth intermediate relay normally open contact are connected with one end of the third alternating current contactor working coil through the normally closed contacts of the ninth intermediate relay and the eleventh intermediate relay;
the power supply comprises a switch power supply, a first to a twelfth intermediate relays, a power-off delay relay, a time relay, working coils of a first to a third alternating current contactors, a public end of a first humidifier electric butterfly valve turn-on and turn-off coil and a second humidifier pressure relief electric valve turn-on and turn-off coil, and the other ends of the overtemperature instrument, the water pump, the sound and light alarm lamp and the circulating fan are connected with a zero line of the working power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120285636.0U CN214253038U (en) | 2021-02-01 | 2021-02-01 | Temperature and humidity control device of steam box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120285636.0U CN214253038U (en) | 2021-02-01 | 2021-02-01 | Temperature and humidity control device of steam box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113647807A (en) * | 2021-10-10 | 2021-11-16 | 安徽艾宁机电设备有限公司 | Steam box control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113647807A (en) * | 2021-10-10 | 2021-11-16 | 安徽艾宁机电设备有限公司 | Steam box control circuit |
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