Ceramic kiln with vacuum degree controlled by ejector

Abstract

The utility model discloses a ceramic kiln with the vacuum degree controlled by an ejector, and relates to the technical field of ceramic kilns. The ceramic kiln with the vacuum degree controlled by the ejector comprises a kiln body, a communicating pipe is connected to one side of the top end of the kiln body in an embedded mode, a stepped groove is formed in the top end of an inner cavity of the communicating pipe, fixing screw rods are fixedly arranged at the four corners of the surface of the top of the communicating pipe, and a clamping assembly is arranged in an inner cavity of the stepped groove; the four corners of the clamping assembly are connected with the four fixing screw rods in an inserted mode correspondingly, and each fixing screw rod is rotationally connected with a fixing nut. According to the utility model, the temperature sensor and the pressure sensor are used for feeding back signals, so that the electric control box automatically controls the opening or closing of the ejector and the electromagnetic valve, the stability of the vacuum degree in the kiln is realized, and the control precision and safety are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to ceramic kiln technical field, concretely is a kind of ceramic kiln of ejector control vacuum degree. BACKGROUND

[0002] Ceramic kiln is generally referred to as the furnace for firing ceramic ware and sculpture or is to let enamel to be fused to the surface of metal ware, it is by refractory material heap and is formed, it is the melting device that ceramic manufacturing industry must have, by the device, it is convenient to process ceramic, to facilitate the subsequent process, it is the indispensable step of ceramic manufacturing industry, when "reduction firing" method is fired ceramic product, reduction glaze is different from ordinary oxidation firing, because of the lack of oxygen in kiln room, so fuel must extract oxygen element from glaze raw material even body clay to assist combustion when burning, glaze raw material will change and recombine, because of the high-temperature environment in kiln room and normal temperature difference, special molecular structure can be reduced in high temperature, such as "ferrous oxide" of celadon, because of the tempering of high-temperature reduction, it can produce glaze color like gem, beautiful jade quality.

[0003] However, when the existing ceramic kiln adopts reduction firing method to fire ceramic, the heat resistance of vacuum pump used in the vacuum control of kiln is weak, the precision and stability of vacuum degree cannot be well controlled, thereby affecting the quality of reduction glaze of ceramic product, so we propose a kind of ceramic kiln of ejector control vacuum degree to solve the above problems. CONTENT OF UTILITY MODEL

[0004] In view of the deficiency of prior art, the utility model provides a kind of ceramic kiln of ejector control vacuum degree, solve the heat resistance of vacuum pump used in the vacuum control of kiln, the precision and stability of vacuum degree cannot be well controlled, thereby affecting the quality of reduction glaze of ceramic product problem.

[0005] To achieve the above object, the utility model is realized by the following technical scheme: a kind of ceramic kiln of ejector control vacuum degree, including kiln, the top side of the kiln is inlaidly connected with communicating pipe, and the inner chamber top of the communicating pipe is provided with ladder groove, the top surface of the communicating pipe is fixedly provided with fixed screw at four corner positions, the inner chamber of the ladder groove is provided with clamping assembly, and the four corners of the clamping assembly are respectively connected with four fixed screw plug-in, each fixed screw is rotatably connected with fixed nut;

[0006] The top surface of the clamping assembly is provided with temperature sensor and pressure sensor on one side, the top surface of the clamping assembly is provided with vacuumizing pipe on the other side, and the top end of the vacuumizing pipe is connected with ejector, the vacuumizing pipe is connected with solenoid valve in position close to the ejector, and the outer wall of the kiln is provided with electric control box on one side.

[0007] Preferably, the clamping assembly comprises a sealing plate arranged in the inner cavity of the stepped groove, and the top surface of the sealing plate is provided with three limiting holes, two of which are away from the other limiting hole;

[0008] The inner cavity of each limiting hole is provided with a guide pipe, and the inner cavity top end of each guide pipe is provided with an annular threaded groove, and the top surface of the sealing plate is provided with a mounting hole for inserting the fixing screw rod at the corner position.

[0009] Preferably, the inner cavity of the annular threaded groove is provided with a first high-temperature-resistant sealing rubber ring at the bottom.

[0010] Preferably, an annular mounting groove is arranged on the outer side wall of the sealing plate and close to the bottom end position, and the inner cavity of the annular mounting groove is provided with a second high-temperature-resistant sealing rubber ring.

[0011] Preferably, the ejector and the vacuum pipe are made of high-temperature-resistant material, which is corundum.

[0012] Preferably, the electromagnetic valve is a high-temperature-resistant electromagnetic valve.

[0013] Preferably, the temperature sensor and the pressure sensor are high-temperature-resistant sensors.

[0014] The utility model provides a kind of ceramic kiln of ejector control vacuum degree.Compared with prior art, it has the following beneficial effects:

[0015] The ceramic kiln of ejector control vacuum degree, through communication pipe, can be installed on the top surface side of kiln, and then the clamping assembly can be preliminarily installed through stepped groove, then fixed by the cooperation of fixing screw rod and fixing nut, so that the clamping assembly can be fixed at the top end of communication pipe, thereby the stability of clamping assembly use can be improved, then through clamping assembly, temperature sensor and pressure sensor and vacuum pipe can be respectively installed and fixed, thereby convenient and stable operation can be realized, electromagnetic valve is installed on the vacuum pipe line between kiln and ejector, for controlling the on-off of vacuum pipe line, and temperature sensor is used for measuring and feeding back signal to adjust the temperature in kiln, pressure sensor is installed on the top of kiln, for monitoring the pressure in kiln, and feeding back signal to electric control box in time, so that the opening or closing of electric control box is automatically controlled by the feedback signal of temperature sensor and pressure sensor, the stability of vacuum degree in kiln is realized, and the control precision and safety are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is overall structure schematic diagram of the utility model;

[0017] Figure 2 It is side structure schematic diagram of the utility model;

[0018] Figure 3 It is the explosion structure schematic view of the utility model;

[0019] Figure 4 It is the card assembly structure schematic view of the utility model.

[0020] In the figure: 1, kiln; 2, communicating pipe; 3, ladder groove; 4, fixed screw rod; 5, card assembly; 51, sealing plate; 52, limit hole; 53, guide pipe; 54, annular screw groove; 55, first high-temperature-resistant sealing rubber ring; 56, mounting hole; 57, annular mounting groove; 58, second high-temperature-resistant sealing rubber ring; 6, fixed nut; 7, temperature sensor; 8, pressure sensor; 9, ejector; 10, electromagnetic valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-3 The utility model provides a kind of technical scheme: a kind of ceramic kiln of ejector control vacuum degree, including kiln 1, the top end side of kiln 1 is embeddedly connected with communicating pipe 2, and the inner cavity top end of communicating pipe 2 is provided with ladder groove 3, the top surface of communicating pipe 2 four corners position is fixedly provided with fixed screw rod 4, the inner cavity of ladder groove 3 is provided with card assembly 5, and four corners of card assembly 5 are respectively connected with four fixed screw rod 4 plug-in, each fixed screw rod 4 is rotatably connected with fixed nut 6;The top surface side of card assembly 5 is provided with temperature sensor 7 and pressure sensor 8, the other side of the top surface of card assembly 5 is provided with vacuumizing pipe, and the top end of vacuumizing pipe is connected with ejector 9, and electromagnetic valve 10 is connected in series on vacuumizing pipe and close to ejector 9 position, and the side of the outer wall of kiln 1 is provided with electric cabinet;

[0023] Through the communication pipe 2, can be installed in the top surface of the kiln 1 side, can be through the ladder groove 3 preliminary installation to the clamping assembly 5, then through the fixed screw rod 4 and fixed nut 6 cooperation, can be fixed in the communication pipe 2 top end of the clamping assembly 5, in turn can improve the stability of the use of clamping assembly 5, then through the clamping assembly 5, can be installed respectively on the temperature sensor 7 and pressure sensor 8 and vacuum pipe, in turn can be convenient and stable operation, through the vacuum pipe between the kiln 1 and the injector 9 installation has solenoid valve 10, for controlling the on-off of the vacuum pipe, and the temperature sensor 7 is used for measuring and feedback signal to adjust the temperature in the kiln, the pressure sensor 8 is installed on the top of the kiln, for monitoring the pressure inside the kiln 1, and feedback signal to the electric control box in time, so that the temperature sensor 7, pressure sensor 8 feedback signal makes the electric control box automatically control the opening or closing of the injector 9 and solenoid valve 10, realize the stability of the vacuum degree inside the kiln 1, ensure the control precision and safety.

[0024] Referring to Figure 3 , Figure 4 , the clamping assembly 5 comprises an inner cavity provided with a sealing plate 51 in the ladder groove 3, the top surface of the sealing plate 51 is provided with three limiting holes 52, two of which are away from the other limiting hole 52; the inner cavity of each limiting hole 52 is provided with a conduit 53, the inner cavity of each conduit 53 is provided with an annular threaded groove 54 at the top end, the top surface of the sealing plate 51 is provided with four mounting holes 56 for inserting the fixed screw rod 4, the inner cavity of the annular threaded groove 54 is provided with a first high temperature resistant sealing rubber ring 55, the outer side wall of the sealing plate 51 is provided with an annular mounting groove 57 near the bottom end, and the inner cavity of the annular mounting groove 57 is provided with a second high temperature resistant sealing rubber ring 58;

[0025] Through the sealing plate 51 in the clamping assembly 5, it can be covered in the inner cavity of the ladder groove 3, and the three limiting holes 52 can be respectively installed in the corresponding conduit 53, and the two adjacent conduits 53 can be respectively installed and fixed in the temperature sensor 7 and the pressure sensor 8 through the annular threaded groove 54, so as to improve the stability of the two, and the user can also disassemble and maintain them conveniently, and the other conduit 53 can also be installed through the annular threaded groove 54, so as to conveniently connect the injector 9 with the inside of the kiln 1, the first high temperature resistant sealing rubber ring 55 can improve the sealing effect of the temperature sensor 7, the pressure sensor 8 and the vacuum pipe installed in the annular threaded groove 54, the four mounting holes 56 can be respectively inserted and installed with the four fixed screw rods 4, so as to cooperate with the fixed nut 6 to fix the sealing plate 51 on the communication pipe 2, and the annular mounting groove 57 and the second high temperature resistant sealing rubber ring 58 can improve the sealing effect of the sealing plate 51 covered on the ladder groove 3.

[0026] Referring to Figures 1-3The injector 9 and the vacuum pipe are made of high-temperature-resistant material, i.e. corundum.

[0027] Referring to Figures 1-3 The electromagnetic valve 10 is a high-temperature-resistant electromagnetic valve, and a high-temperature-resistant butterfly valve imported from the United States YLOK is used.

[0028] Referring to Figures 1-3 The temperature sensor 7 and the pressure sensor 8 are high-temperature-resistant sensors.

[0029] In operation, the door of the kiln 1 is opened, the ceramic products to be fired are placed in the kiln 1, and then the door of the kiln 1 is closed to keep the kiln 1 sealed. The vacuumization of the kiln 1 can be started through the electric control box. At this time, the electromagnetic valve 10 is opened, and the injector 9 starts to vacuumize the kiln 1 through the vacuum pipe, and the steam in the kiln 1 is sucked as the working fluid of the injector 9.

[0030] Then, the steam is mixed with the low-temperature and low-pressure injection fluid to form a fluid discharged from the injector 9. The injector 9 continues to work until the absolute pressure in the kiln 1 reaches 2 kPa. The electric control box controls the electromagnetic valve 10 to be closed, and the injector 9 stops vacuumizing the kiln 1, so that the absolute pressure in the kiln 1 is kept at 2 kPa.

[0031] Then, the kiln 1 starts to heat and fire the ceramic. During this process, if the absolute pressure in the kiln 1 is higher than 2 kPa, the electric control box receives the feedback signal of the pressure sensor 8 and controls the opening of the electromagnetic valve 10. The injector 9 starts to work and sucks the gas in the kiln 1. When the temperature and pressure of the kiln 1 return to 2 kPa, the electric control box controls the electromagnetic valve 10 to be closed again, and the injector 9 stops the gas suction, so that the vacuum in the kiln 1 is maintained at 2 kPa.

[0032] In summary, the feedback signals of the temperature sensor 7 and the pressure sensor 8 are used to automatically control the opening and closing of the injector 9 and the electromagnetic valve 10 by the electric control box, so that the stability of the vacuum degree in the kiln 1 is realized, and the control precision and safety are ensured.

[0033] Meanwhile, the contents not described in detail in the specification are all the existing technologies known to those skilled in the art.

Claims

1. A ceramic kiln with ejector controlled vacuum, comprising a kiln (1), characterized in that: The top side of the kiln (1) is embedded with a communication pipe (2), and the inner cavity of the communication pipe (2) is provided with a stepped groove (3), the top surface of the communication pipe (2) is fixedly provided with a fixed screw rod (4) at the four corners, the inner cavity of the stepped groove (3) is provided with a clamping assembly (5), and the four corners of the clamping assembly (5) are respectively connected with the four fixed screw rods (4) through insertion, and each fixed screw rod (4) is rotatably connected with a fixed nut (6); The top surface of the clamping assembly (5) is provided with a temperature sensor (7) and a pressure sensor (8) on one side, and an evacuation pipe is arranged on the other side of the top surface of the clamping assembly (5), and an ejector (9) is connected to the top end of the evacuation pipe, an electromagnetic valve (10) is connected to the evacuation pipe and close to the ejector (9), and an electric control box is arranged on one side of the outer wall of the kiln (1).

2. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 1, characterized in that: The clamping assembly (5) includes an inner cavity of the stepped groove (3) provided with a sealing plate (51), and the top surface of the sealing plate (51) is provided with three limiting holes (52), two of which are away from the other limiting hole (52); The inner cavity of each limiting hole (52) is provided with a conduit (53), and the inner cavity of each conduit (53) is provided with an annular threaded groove (54) at the top end, and the top surface of the sealing plate (51) is provided with a mounting hole (56) for inserting the fixed screw rod (4) at the four corners.

3. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 2, characterized in that: The inner cavity of the annular threaded groove (54) is provided with a first high-temperature-resistant sealing rubber ring (55).

4. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 2, characterized in that: The outer side wall of the sealing plate (51) is provided with an annular mounting groove (57) close to the bottom end, and the inner cavity of the annular mounting groove (57) is provided with a second high-temperature-resistant sealing rubber ring (58).

5. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 1, characterized in that: The ejector (9) and the evacuation pipe are made of high-temperature-resistant material, which is corundum.

6. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 1, characterized in that: The electromagnetic valve (10) is a high-temperature-resistant electromagnetic valve.

7. A ceramic kiln for controlling the vacuum level by means of an ejector according to claim 1, characterized in that: The temperature sensor (7) and the pressure sensor (8) are high-temperature-resistant sensors.

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