Novel drying equipment for ceramic production

Abstract

Novel drying equipment for ceramic production comprises a motor speed reducing mechanism, a heating cylinder, an electric heating pipe, a supporting plate, a humidity detection sensor, a lead screw, an upper cover plate and a detection circuit. A plurality of fixing grooves are formed in the upper end of each supporting plate at intervals, a solenoid is installed in the middle of each supporting plate, a fixing bin is installed outside the lower end of the heating cylinder, a motor speed reducing mechanism is installed at the lower end in the fixing bin, the lower end of a lead screw is installed at the upper end of a rotating shaft, and the supporting plates are connected with the lead screw through internal threads of the solenoid. The multiple sets of electric heating pipes are installed in the heating cylinder, the upper cover plate is installed outside the upper end of the heating cylinder, the exhaust pipe is installed at one side end of the upper cover plate, and a detection head of the humidity detection sensor is installed in the exhaust pipe. And the electric detection circuit is arranged in the element box. The number of ceramic product green bodies dried each time is increased, the probability that the quality problems of the dried ceramic product green bodies occur is reduced, and when the set drying value is reached, a main power source can be automatically turned off, and workers are reminded.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic production auxiliary equipment, in particular to a drying device for new ceramic production. Background Technique

[0002] After the ceramic utensils are produced, their blanks will be dried and shaped. The drying process of the ceramic product blanks is a crucial step. It involves the removal of moisture in the blanks. This process not only improves the strength of the blanks, making them easier to handle, load into the kiln, and fire (increasing the firing speed), but also effectively prevents rejects caused by the massive discharge of moisture in the blanks at the initial stage of firing (improving the product quality). Appropriate drying can leave about 2% residual moisture in the blanks. This moisture content not only ensures the strength of the blanks but also avoids corner brittleness and increased rejects caused by over-drying. In the existing drying devices for ceramic product blanks, the general mechanism includes a heating cylinder, electric heating tubes, and a support plate. Multiple electric heating tubes are installed at appropriate positions inside the heating cylinder. Multiple ceramic product blanks to be dried are placed on the upper ends of multiple support plates inside the heating cylinder. The heat released by the multiple electric heating tubes acts on the ceramic product blanks, thereby drying the ceramic product blanks. Although the existing drying devices for ceramic product blanks meet the production needs to a certain extent, due to structural and functional limitations, there are still the following technical drawbacks. First, the ceramic product blanks are heated in a fixed state inside the heating cylinder. The heat released by the electric heating tubes cannot ensure that the temperatures in all parts of the heating cylinder are the same. It is possible that some of the ceramic product blanks on the support plate are closer to the heat source and receive relatively more heat and a faster drying speed, while other ceramic product blanks are farther from the heat source and receive relatively less heat and a slower drying speed. When the set drying and heating time arrives, it is possible that some of the ceramic product blanks receive too much heat and are over-dried, resulting in cracks, etc. On the contrary, some other ceramic product blanks receive relatively less heat and do not achieve a good drying effect, which has an adverse impact on subsequent further processing. Second, the height between the upper and lower ends of the multiple support plates for carrying and placing the ceramic product blanks is fixed. In this case, when the height of the ceramic product blanks to be dried is relatively low and the height between each two support plates is relatively high, it is impossible to dry a relatively larger number of ceramic product blanks at one time, which is not conducive to improving work efficiency. On the contrary, when the height of the ceramic product blanks to be dried is relatively high and the height between each two support plates is relatively low (lower than the height of the ceramic product blanks to be dried), it is impossible to effectively place the ceramic product blanks at the drying station, which has an adverse impact on the actual drying work (equipping multiple sets of drying devices for ceramic product blanks with different support plate spacings will also increase the equipment investment cost).Thirdly, for the control of the drying time of the ceramic product blank, it is generally set relying on the experience of technicians. That is to say, when technicians lack work experience, or the humidity of the ceramic product blank in the corresponding batch is too high or too low, it is possible that the drying time set by the technicians is too long or too short, resulting in the drying quality of the ceramic product blank not meeting the processing requirements of subsequent processes. In summary, it is particularly necessary to provide a drying device for ceramic product blanks that can adjust the distance between two pallets, meet the drying needs of ceramic products with different heights, enable multiple ceramic product blanks to be evenly heated and dried simultaneously as much as possible, can automatically control the drying degree, and can prompt the staff in time after drying is completed. Summary of the Invention

[0003] In order to overcome the drawbacks of the existing drying device for ceramic product blanks as described in the background art due to structural limitations, the present invention provides a drying device for new ceramic production that allows staff to adjust the distance between every two pallets according to the height of the ceramic product blank to be dried. On the basis of meeting the drying of ceramic product blanks with different heights, it also correspondingly increases the number of ceramic product blanks dried each time. It can evenly heat and dry multiple ceramic product blanks to be dried simultaneously during rotation, reducing the probability of quality problems occurring in the ceramic product blanks after drying. Moreover, it can automatically detect the drying degree of the ceramic product blank. When the set drying value is reached, it can automatically turn off the main power supply and prompt the staff, ensuring the quality of the ceramic product blank after drying and bringing convenience to the staff.

[0004] The technical solution adopted by the present invention to solve its technical problems is:

[0005] A drying device for the production of a new type of ceramic, comprising a motor reduction mechanism, a heating cylinder, electric heating tubes, a tray, a humidity detection sensor, a lead screw, and an upper cover plate, characterized in that it further has a detection circuit; there are multiple trays, each tray is distributed with multiple ventilation holes, and multiple fixing grooves are installed at intervals on the upper end of each tray. The upper end of each fixing groove is an open structure, and the lower end and the side end respectively have multiple ventilation holes. A ceramic product embryo to be dried is placed in each fixing groove. A screw tube is installed in the middle of each tray, and a fixing bolt is installed on the side of the screw tube; a fixing bin is installed outside the lower end of the heating cylinder, the motor reduction mechanism is installed at the lower end inside the fixing bin, and the rotating shaft of the motor reduction mechanism rotates outside the upper end of the fixing bin; a sealing door is movably installed at the front side end of the heating cylinder; the lower end of the lead screw is installed at the upper end of the rotating shaft, and multiple trays are respectively connected to the lead screw through the internal thread of the screw tube, and there is a vertical interval distance between multiple trays; there are multiple sets of electric heating tubes, and multiple sets of electric heating tubes are respectively installed inside the heating cylinder. The upper end of the heating cylinder is an open structure, the upper cover plate is installed outside the upper end of the heating cylinder, an exhaust pipe is installed at one side end of the upper cover plate, and the detection head of the humidity detection sensor is installed inside the exhaust pipe; the detection circuit is installed in the component box, the signal output end of the humidity detection sensor is electrically connected to the signal input end of the detection circuit, and the power output end of the detection circuit is electrically connected to the power input ends of multiple electric heating tubes.

[0006] Further, the detection circuit is equipped with a temperature control switch. The temperature control switch is installed at the other side end of the upper cover plate and its detection head is located at the lower end of the upper cover plate. The two wiring terminals of the temperature control switch are electrically connected in series between one power output end of the detection circuit and one power input end of multiple electric heating tubes.

[0007] Further, a fixing plate is installed outside the upper end of the heating cylinder. The upper cover plate and the fixing plate are installed together. A bearing seat is installed at the lower end of the upper cover plate, and the upper end of the lead screw is sleeved inside the bearing inner ring of the bearing seat.

[0008] Further, the detection circuit includes an adjustable resistor, a resistor, a triode, a relay, and a buzzer that are electrically connected. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the triode. The collector of the triode is connected to the negative power input end of the relay. The other end of the adjustable resistor is connected to the emitter of the triode. The power input end inside the buzzer and the two normally closed contact ends of the relay are respectively connected.

[0009] Compared with the prior art, the beneficial effects of the present utility model are: (1) In practical applications of the present new type, the upper cover plate can be opened to increase or decrease the number of trays.

[0010] It can adjust the spacing between every two pallets according to the height of the ceramic product green body to be dried. On the basis of meeting the drying of ceramic product green bodies of different heights, the number of ceramic product green bodies dried each time is also correspondingly increased. (2) During operation, the motor reduction mechanism can drive multiple pallets to rotate, and then the electric heating tubes can simultaneously and uniformly heat and dry multiple ceramic product embryos to be dried during rotation. In this way, the probability of quality problems occurring in the ceramic product green bodies after drying is reduced. (3) The detection circuit and the humidity detection sensor cooperate with each other to automatically detect the drying degree of the ceramic product green body (that is, the humidity data in the exhaust gas discharged during drying). When the set drying value is reached, it can automatically turn off the main power supply and prompt the staff, which not only ensures the quality of the ceramic product green body after drying but also brings convenience to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0013] Figure 2 is the circuit diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Figure 1 、 2As shown in the figure, a drying device for a new type of ceramic production includes a horizontal motor reduction mechanism M1, a heating cylinder 1, electric heating tubes RT, a support plate 2, a power supply module A1, a humidity detection sensor A2, a lead screw 3, an upper cover plate 4, and also has a detection circuit 5; there are multiple support plates 2, and each support plate 2 is distributed with multiple ventilation holes 21 at intervals, and multiple fixing grooves 22 are welded at intervals on the upper end of each support plate 2. The upper end of each fixing groove 22 is an open structure, and the lower end and the side end respectively have multiple ventilation holes 221. A ceramic product embryo to be dried is placed in each fixing groove 22. A hollow screw tube 23 is vertically welded in the middle of each support plate 2. There is a threaded hole on the upper side of the screw tube 23, and a manual bolt 24 is screwed into the threaded hole; a fixed bin 6 is welded outside the lower end of the heating cylinder 1. There is an opening in the middle of the lower end of the heating cylinder 1, and a bearing 101 is welded in the opening. The horizontal motor reduction mechanism M1 is installed in the middle of the fixed bin 6 through bolts. The rotating shaft of the horizontal motor reduction mechanism M1 is tightly sleeved in the inner ring of the bearing 101 and the upper end of the rotating shaft is located outside the upper end of the fixed bin 6; there is an arc-shaped opening 102 at the front end of the heating cylinder 1, and the opening is equipped with an arc-shaped sealing door 103. The left end of the sealing door 103 is rotatably installed at the left end of the opening 102 through a hinge. The right end of the opening has three threaded holes 104 from top to bottom. The sealing door 103 is hermetically installed at the front side of the opening of the heating cylinder 1 by screwing three bolts 105 into the three threaded holes 104 respectively through three openings distributed from top to bottom at the right end of the sealing plate; the lower end of the lead screw 3 is vertically welded on the upper side end of the rotating shaft of the horizontal motor reduction mechanism M1. Multiple support plates 2 are respectively connected through the internal thread of the screw tube and the lead screw 3, and there is a distance between the multiple support plates 2 up and down; there are 12 sets of electric heating tubes RT, and the 12 sets of electric heating tubes RT are respectively installed at the lower end, the left and right inner sides, and the rear end inside the heating cylinder 1 (the wires connected to the electric heating tubes RT are sleeved with insulating ceramic tubes on the outside, and the wires enter the fixed bin 6 through multiple openings at the lower end of the heating cylinder, and the openings are sealed with heat-resistant sealant). The upper end of the heating cylinder 1 is an open structure. The upper cover plate 4 is installed outside the upper end of the heating cylinder 1. A exhaust pipe 41 communicating with its lower part is welded in the middle of the left end of the upper cover plate 4. There is an opening in the middle of the right end of the exhaust pipe. The detection head of the humidity detection sensor A2 is hermetically installed in the opening and the detection head is located inside the exhaust pipe 41 (the outer diameter of the detection head is 3 cm smaller than the inner diameter of the exhaust pipe 41); the power supply module A1 and the detection circuit 5 are installed on the circuit board in the component box 7 at the right end inside the fixed bin 6.

[0015] Figure 1 , 2As shown in the figure, the detection circuit is equipped with a temperature control switch W. The temperature control switch W is installed in the middle of the right outer side of the upper cover plate 4, and its detection head is located at the lower end of the upper cover plate 4. The two wiring terminals of the temperature control switch W are connected in series between one normally open contact terminal of the relay K1 in the detection circuit and one power input terminal of multiple electric heating tubes RT through wires. A ring-shaped fixing plate 106 is welded on the outer side of the upper end of the heating cylinder. The fixing plate 106 is annularly distributed with multiple openings, and the outer side end of the upper cover plate 4 is annularly distributed with multiple openings. The upper cover plate 4 and the fixing plate 106 are hermetically installed together with bolts through the openings. A bearing seat 8 is installed in the middle of the lower end of the upper cover plate 4 with bolts. The upper end of the lead screw 3 is sleeved in the bearing inner ring of the bearing seat 8. The detection circuit includes an adjustable resistor RP1, resistors R1 and R2, a triode Q1, a relay K1, and a buzzer B connected by circuit board wiring. One end of the adjustable resistor RP1, one end of the first resistor R1, and one end of the second resistor R2 are connected. The other end of the second resistor R2 is connected to the base of the triode Q1. The collector of the triode Q1 is connected to the negative power input terminal of the relay K1. The other end of the adjustable resistor RP1 is connected to the emitter of the triode Q1. The power input ends of the buzzer B are respectively connected to the two normally closed contact terminals of the relay K1. The horizontal motor reduction mechanism M1 is connected to the two poles of the AC 220V power supply through wires in series with a power switch S1, the power input terminals 1 and 2 of the power module A1, and the two control power input terminals of the relay K1 in the detection circuit. The power output terminals 3 and 4 of the power module A1 are connected to the positive power input terminal of the relay K1 in the power input terminal of the detection circuit, the emitter of the triode Q1, and the power input terminals 1 and 2 of the humidity detection sensor A2 (connected in series with a power switch S2) through wires respectively. The signal output terminal 3 of the humidity detection sensor A1 is connected to the other end of the resistor R1 in the signal input terminal of the detection circuit through a wire. The two normally open contact terminals of the relay K1 in the power output terminal of the detection circuit are connected to the power input ends of 12 electric heating tubes RT through wires respectively. The handles of the two power switches are located outside the openings at the front end of the component box.

[0016] Figure 1 , 2As shown in the figure, in this new type, the staff opens the sealing door 103 and adjusts the heights of two adjacent pallets 2 up and down according to the height of the ceramic product blank to be dried, so that the lower end of the ceramic product blank during subsequent drying can be conveniently placed in the fixing groove 22. Specifically, the staff loosens the bolt 24 with the hand to the left, and then rotates the pallet 2 clockwise or counterclockwise. The pallet 2 moves up or down along the screw rod 3 through its screw tube 23 to achieve height adjustment. After the adjustment is in place, the staff tightens the bolt 24 with the hand to the right to prevent the pallet from loosening during operation. In this new type, when the height of the ceramic product blanks to be dried in batches is relatively low, the staff can also remove the upper cover plate 4, and then screw another pallet or multiple pallets into the screw rod through the screw tube and fix them on the screw rod at appropriate intervals from top to bottom. Then, the staff installs the upper cover plate and the fixing plate 106 together with bolts (the upper end of the screw rod is located inside the inner ring of the bearing of the bearing seat). The staff places the lower ends of multiple ceramic product blanks to be dried in multiple fixing grooves 22 respectively, and then seals and installs the sealing door 103 at the front side of the opening of the heating cylinder 1 by screwing three bolts 105 into three screw holes 104 respectively through three openings distributed from top to bottom at the right side end of the sealing plate. Through the above, in practical applications, this new type can open the upper cover plate to increase or decrease the number of pallets, and can adjust the distance between every two pallets according to the height of the ceramic product blanks to be dried, which not only meets the drying of ceramic product blanks of different heights, but also correspondingly increases the number of ceramic product blanks dried each time.

[0017] Figure 1 、 2 As shown in the figure, after turning on the main power switch, when the AC 220V power enters the power input terminal of the power module A1, the stable DC 12V power output from pins 3 and 4 of the power module A1 enters the power input terminals of the detection circuit and the humidity sensor. The 220V AC power enters the power input terminals of multiple electric heating tubes RT through the two control power input terminals and the two normally open contact terminals of the relay K1. The multiple electric heating tubes RT are powered on to heat and dry the ceramic product blanks in the heating cylinder. In actual situations, when the temperature in the heating chamber 1 is lower than 90°C, the internal contacts of the temperature switch W are closed. In this way, the multiple electric heating tubes RT will be powered on and generate heat. When the temperature in the heating chamber 1 is higher than 90°C, the internal contacts of the temperature switch W are open. In this way, the multiple electric heating tubes RT will no longer be powered on and generate heat. Through the above, this new type can ensure that during drying, the ceramic product blanks are dried at a constant temperature in the heating chamber. After turning on the power switch S1 of the motor reduction mechanism M1, its rotating shaft drives multiple pallets to rotate at a speed of 5 revolutions per minute. Furthermore, the electric heating tubes can simultaneously and evenly heat and dry multiple ceramic product embryos to be dried during rotation. In this way, the probability of quality problems occurring in the ceramic product blanks after drying is reduced.

[0018] Figure 1 、 2As shown, after the detection circuit and the humidity sensor A2 are powered on (the power switch S2 is turned on), the humidity sensor A2 can continuously detect the humidity of the hot air discharged through the exhaust pipe 41 in the drying bin for the blank (the lower the dryness of the blank, the higher the humidity, and vice versa). When the dryness of the blank is low and the humidity is high, the voltage signal output from pin 3 of the humidity sensor A2 is higher; conversely, the output voltage signal is lower. In actual situations, during the drying of the blank, when the air humidity is greater than 2% (the required humidity after drying the ceramic blank is 2%), the voltage signal output from pin 3 of the humidity sensor A2 is relatively high. This voltage signal is divided by the adjustable resistor RP1 and the resistor R1, and the resistor R2 reduces the voltage and limits the current before entering the base of the triode Q1, which is higher than 0.7V. The triode Q1 will conduct, and its collector will output a low level and enter the negative power input terminal of the relay K1. The relay K1 will be powered on and its control power input terminal and normally open contact terminal will close, and the 12 electric heating tubes RT will be powered on to heat the blank in the drying bin. When the air humidity approaches 2% during the drying of the blank, the voltage signal output from pin 3 of the humidity sensor A2 is relatively low. This voltage signal is divided by the adjustable resistor RP1 and the resistor R1, and the resistor R2 reduces the voltage and limits the current before entering the base of the triode Q1, which is lower than 0.7V. The triode Q1 will not conduct, and the relay K1 will lose power and no longer be attracted, and its control power input terminal and normally open contact terminal will be open, while the control power input terminal and normally closed contact terminal will close. In this way, the 12 electric heating tubes RT will lose power and no longer heat the blank in the drying bin. After the relay K1 loses power and its control power input terminal and normally closed contact terminal close, the buzzer B will be powered on and emit a sound. After the staff hears the sound, they can promptly turn off the main power switch, open the sealing door 103, and take out the dried ceramic product blank, which not only ensures the quality of the ceramic product blank after drying but also brings convenience to the staff. Figure 2Among them, the power supply module A1 is a finished product of an AC 220V to DC 12V switching power supply module; the relay K1 is a DC 12V relay; the model of the triode Q1 is 9013 (NPN type); the resistance values of the resistors R1 and R2 are 41K and 4.7K respectively; the motor reduction mechanism M1 is a finished product of a motor gear reducer with a power of 3KW; the resistance value of the adjustable resistor RP1 is 470K (in this embodiment, it is adjusted to 7K. In actual production, the larger the resistance value of the adjustable resistor RP1 is adjusted, the greater its voltage division, and then the higher the drying degree of the blank. Then, the triode Q1 will conduct, that is, the drying humidity threshold is set relatively large; the smaller the resistance value of the adjustable resistor RP1 is adjusted, the smaller its voltage division, and then the lower the drying degree of the blank, and only then will the triode Q1 conduct, that is, the drying humidity threshold is set relatively small. Specifically, technicians adjust it according to the drying humidity requirements); the buzzer B1 is a high-decibel active continuous sound buzzer alarm with a working voltage of AC 220V and a model of SFM-27; the electric heating tube RT is a finished product of a dry-burning straight electric heating tube (with a power of 1KW); the temperature switch W is a finished product of a liquid-expansion adjustable temperature control switch of the Fangming brand (the temperature adjustment range is between 50 - 300°C, and in this new type, it is adjusted to 90°C); the humidity sensor A2 is a temperature and humidity sensor with a model of FG2010, which has two power input terminals and one signal output terminal (capable of outputting a voltage signal of 0 - 5V).

[0019] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0020] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new type of drying equipment used in ceramic production, including a motor reduction mechanism, a heating cylinder and an electric heating tube, a support plate, a humidity detection sensor, a screw rod, and an upper cover plate, characterized in that: It also has a detection circuit; there are multiple support plates, each of which is provided with multiple air holes, and multiple fixing grooves are installed at intervals on the upper end of each support plate, the upper end of each fixing groove is an open structure, and the lower end and the side end are respectively provided with multiple air holes, and a ceramic product embryo to be dried is placed in each fixing groove, a spiral tube is installed in the middle of each support plate, and a fixing bolt is installed on the side of the spiral tube; a fixed bin is installed outside the lower end of the heating cylinder, a motor reduction mechanism is installed at the lower end of the fixed bin, and the rotating shaft of the motor reduction mechanism is rotated outside the upper end of the fixed bin; a sealing door is movably installed at the front side end of the heating cylinder; the wire The lower end of the rod is installed on the upper end of the rotating shaft, and multiple support plates are respectively connected via the internal thread of the spiral tube and the screw rod, and the multiple support plates are spaced apart from each other up and down; the electric heating tubes are provided with multiple sets, and the multiple sets of electric heating tubes are respectively installed in the heating tube, the upper end of the heating tube is an open structure, the upper cover plate is installed outside the upper end of the heating tube, an exhaust pipe is installed on one side of the upper cover plate, and the detection head of the humidity detection sensor is installed in the exhaust pipe; the detection circuit is installed in the component box, the signal output end of the humidity detection sensor is electrically connected to the signal input end of the detection circuit, and the power output end of the detection circuit is electrically connected to the power input end of the multiple electric heating tubes.

2. A drying device for use in the production of new ceramics according to claim 1, characterized in that: The detection circuit is equipped with a temperature control switch, which is installed on the other side of the upper cover and its detection head is located at the lower end of the upper cover. The two wiring terminals of the temperature control switch are electrically connected in series between one of the power output terminals of the detection circuit and one of the power input terminals of the multiple electric heating tubes.

3. The drying equipment for the production of new ceramics according to claim 1 is characterized in that: A fixing plate is installed on the outer side of the upper end of the heating cylinder, the upper cover plate and the fixing plate are installed together, a bearing seat is installed on the lower end of the upper cover plate, and the upper end of the screw rod is sleeved in the bearing inner ring of the bearing seat.

4. The drying equipment for the production of new ceramics according to claim 1 is characterized in that: The detection circuit includes an electrically connected adjustable resistor, a resistor, a transistor, a relay, and an alarm. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input end of the relay. The other end of the adjustable resistor is connected to the emitter of the transistor. The power input end of the alarm is connected to the two normally closed contact ends of the relay respectively.

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