A safe and controllable glass tempering heating furnace

Abstract

The present invention discloses a safe and controllable glass tempering heating furnace; it includes a plurality of heating units and a lifting mechanism; the heating unit includes a fan unit, an upper heating module and a lower heating module arranged in sequence from top to bottom; the upper heating module is provided with an upper thermocouple and a middle thermocouple; the upper thermocouple is arranged in front of the fan; the middle thermocouple is arranged below the lower plate surface of the upper radiation plate; the lower heating module is provided with a lower thermocouple; the upper end of the lower thermocouple passes through the lower radiation plate and the refractory support seat from below and is exposed above the upper plate surface of the radiation plate; when the temperature difference measured by the upper thermocouple and the middle thermocouple and the lower thermocouple exceeds the set threshold, the lifting mechanism is started to open the gap between the furnace body and the lower furnace frame. It has a multi-dimensional temperature monitoring function and is also provided with a lifting mechanism, which has good safety.

Description

Technical Field

[0001] The invention belongs to the technical field of glass thermal processing mechanical equipment, and in particular relates to a safe and controllable glass tempering heating furnace. Background Art

[0002] The heat source of the tempered glass heating furnace is relatively concentrated, which makes the temperature inside the furnace easily unevenly distributed. If the temperature unevenness is serious and the heat cannot be discharged in time, the glass is likely to crack and the furnace will explode, causing serious losses.

[0003] The heating furnace of tempered glass uses heating wire for heating, and the heat conduction of the radiation plate makes the temperature distribution in the furnace more uniform. Under high temperature conditions, the metal radiation plate is easy to deform and bend downward, which is easy to touch the heating wire, thus damaging the heating wire, causing the heating wire to short-circuit to the ground, or even burning or breaking the heating wire, and also causing damage to the solid-state relay connected to the heating wire, requiring the furnace to be stopped immediately for maintenance.

[0004] In order to reduce the deformation of the radiation plate, the solution in the prior art is to increase the thickness of the radiation plate, but the effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to provide a safe and controllable glass tempering heating furnace, which is not only equipped with thermocouples to detect the furnace temperature in multiple dimensions, but also has a lifting mechanism for the furnace body, and has good safety performance.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A safe and controllable glass tempering heating furnace comprises a plurality of heating units, wherein the heating units are installed in a furnace body, the furnace body is mounted above a lower furnace frame, and a lifting mechanism is provided between the furnace body and the lower furnace frame;

[0008] The heating unit comprises a fan group, an upper heating module and a lower heating module arranged in sequence from top to bottom; the fan group comprises at least two horizontally arranged fans, the upper heating module comprises a plurality of upper heating wires and a plurality of upper radiation plates, and the lower heating module comprises a plurality of lower heating wires and a plurality of lower radiation plates arranged from bottom to top;

[0009] The upper heating module and the lower heating module are respectively located above and below the conveying rollers for conveying the glass sheets to be tempered;

[0010] The upper heating module is provided with an upper thermocouple and a middle thermocouple;

[0011] The upper thermocouple is located between the fan unit and the upper heating wire, and the upper thermocouple is located between two adjacent fans; the middle thermocouple is arranged below the lower plate surface of the upper radiation plate;

[0012] The lower heating module is provided with a lower thermocouple;

[0013] The upper end of the lower thermocouple passes through the refractory support seat and passes upward from the lower plate surface of the lower radiation plate through the upper plate surface exposed on the lower radiation plate;

[0014] When the temperature difference measured by the upper thermocouple, the middle thermocouple and the lower thermocouple exceeds a set threshold, the lifting mechanism is started to open the gap between the furnace body and the lower furnace frame.

[0015] Preferably, a plurality of wind pressure detection tubes are provided between the upper radiation plate and the conveying roller;

[0016] The pipe opening of the wind pressure detection tube is arranged upward, and the pipe opening is located in the gap between the adjacent upper radiation plates; the detection end of the wind pressure sensor is also installed in the wind pressure detection tube.

[0017] Preferably, the lower heating module further comprises the refractory support seat;

[0018] The fire-resistant support seat is arranged between the lower radiation plate and the lower heating wire;

[0019] The middle part of the lower radiation panel is mounted on the top surface of the refractory support seat;

[0020] The upper part of the fire-resistant support seat is provided with a downwardly recessed installation groove; the installation groove is a U-shaped groove; the lower heating wire is placed in the installation groove;

[0021] The distance between the top surface of the lower heating wire and the bottom surface of the lower radiation plate is greater than the diameter of the circumference of the coiled lower heating wire;

[0022] The width of the installation groove in the left-right direction is greater than the diameter of the circumference of the coiled lower heating wire.

[0023] Preferably, the refractory support seat is further provided with a mounting through hole portion;

[0024] The installation through hole portion is arranged on the groove wall between two adjacent installation grooves; the installation through hole portion passes through the groove wall from bottom to top;

[0025] The mounting through hole portion includes a cylindrical through hole portion and a tapered through hole portion;

[0026] The cylindrical through hole portion is located at the upper end of the mounting through hole portion, and the tapered through hole portion which is smaller at the top and larger at the bottom is located at the lower end of the mounting through hole portion;

[0027] The edge of the upper port of the cylindrical through hole portion is located on the top surface of the refractory support seat; the lower port of the cylindrical through hole portion is connected to the cone top port of the conical through hole portion;

[0028] The conical bottom port of the conical through hole portion is located on the bottom surface of the refractory support seat;

[0029] The upper end of the lower thermocouple is installed through the cylindrical through hole portion and the tapered through hole portion in sequence.

[0030] Specifically, the lifting mechanism includes a driving device, a commutator, a front screw reducer, a rear screw reducer, a plurality of transmission rollers, a plurality of screw lifting frames and a plurality of sprocket couplings;

[0031] The driving device is installed on the top of the furnace body; the two front screw reducers and the two rear screw reducers are respectively fixed on the four corners of the furnace body;

[0032] The screw lifting frames are provided at the four corners close to the furnace body, and the lower ends of the four screw lifting frames are respectively fixed to the top surfaces of the corresponding four corners of the lower furnace frame;

[0033] The screw lifting frame is hollow, and a screw sleeve and a screw are arranged inside the screw lifting frame; the inner side surface of the screw sleeve is provided with a rotating thread matching the outer side surface of the screw;

[0034] The commutator is a three-axis commutator;

[0035] The output ends at the left and right ends of the driving device are respectively connected to the input shafts of the two oppositely arranged commutators;

[0036] The input end of each of the front screw reducers is in transmission connection with the first output shaft of the commutator opposite to its rear end; the input end of each of the rear screw reducers is in transmission connection with the second output shaft of the commutator opposite to its front end;

[0037] The output end of the front screw reducer and the output end of the rear screw reducer are respectively connected to the upper end of the screw located at the corresponding position;

[0038] The sprocket coupling is installed at both ends of the transmission roller; the two ends of the transmission roller are respectively connected to the transmission of the input end or the output end close to them through the sprocket coupling.

[0039] Specifically, the driving device includes a driving motor and a first reducer;

[0040] The output end of the driving motor is transmission-connected to the input end of the first reducer, and the two output ends on the left and right sides of the first reducer are transmission-connected to the input ends of the commutators on the left and right sides respectively through the transmission rollers;

[0041] The screw lifting frame is also provided with a latch hole and a latch;

[0042] The latch hole passes through the middle of the screw lifting frame from left to right;

[0043] When the lower end of the screw rod rises and approaches the upper part of the screw rod sleeve, the latch pin is inserted into the latch pin hole, and the latch pin is located below the lower end of the screw rod.

[0044] In some embodiments, the lifting mechanism further includes at least two intermediate screw reducers;

[0045] The two middle screw reducers are symmetrically arranged between the two front screw reducers and the two commutators;

[0046] The input end of the middle screw reducer is connected to the first output shaft of the commutator through a transmission roller; the output end of the middle screw reducer is connected to the input end of the front screw reducer through a transmission roller;

[0047] The screw lifting frames are respectively provided at the middle of the left and right sides of the furnace body, and the lower ends of the two screw lifting frames are respectively fixed to the upper top surfaces of the middle of the left and right sides of the lower furnace frame;

[0048] The output ends of the two middle-mounted screw reducers are respectively connected to the upper ends of the screws in the screw lifting frames at corresponding positions;

[0049] The middle screw reducer and the front screw reducer, as well as the middle screw reducer and the commutator are respectively connected through transmission rollers, and the sprocket couplings are provided at both ends of the transmission rollers.

[0050] Preferably, it also includes a first ceramic ring and a second ceramic ring;

[0051] The material of the refractory support seat is refractory ceramic;

[0052] The first ceramic ring and the second ceramic ring are respectively mounted on the top and the middle of the lower thermocouple;

[0053] The top end of the lower thermocouple is exposed above the top end of the first ceramic ring; the lower end of the first ceramic ring is inserted into the upper port of the cylindrical through hole;

[0054] The top end of the second ceramic ring is inserted into the lower end of the cylindrical through hole portion; the lower end of the second ceramic ring is located in the middle of the tapered through hole portion.

[0055] Preferably, the thickness of the lower radiation plate is 1-1.2 mm.

[0056] In some other embodiments, the lifting mechanism further includes four center-mounted screw reducers;

[0057] The middle screw reducer is provided between the front screw reducer and the commutator, and between the rear screw reducer and the commutator;

[0058] The input end of the middle screw reducer located in front of the commutator is drivingly connected to the first output shaft of the commutator; the output end of the middle screw reducer is connected to the input end of the front screw reducer;

[0059] The input end of the middle screw reducer located behind the commutator is transmission-connected to the second output shaft of the commutator; the output end of the middle screw reducer is transmission-connected to the input end of the rear screw reducer;

[0060] The four screw lifting frames are respectively arranged near the left and right sides of the furnace body at positions corresponding to the positions of the four middle screw reducers, and the lower ends of the four screw lifting frames are respectively fixed to the top surfaces of the corresponding positions on the left and right sides of the lower furnace frame;

[0061] The output ends of the four middle-mounted screw reducers are respectively and one by one connected to the upper ends of the four screws at the corresponding positions;

[0062] The front screw reducer and the middle screw reducer, the middle screw reducer and the commutator, and the middle screw reducer and the rear screw reducer are respectively connected through transmission rollers, and the sprocket couplings are respectively provided at both ends of the transmission rollers;

[0063] The eight screw lifting frames are symmetrically distributed around the furnace body with the center of the furnace body as the center point.

[0064] The beneficial effects of the technical solution of the present invention are as follows: the safe and controllable glass tempering heating furnace is provided with an upper thermocouple, a middle thermocouple and a lower thermocouple, and not only has a multi-dimensional temperature monitoring function, but also has a lifting mechanism that can timely open the gap between the furnace body and the lower furnace frame, and has good safety.

[0065] The present invention also proposes a lower heating wire protection device using the refractory support seat, which can effectively prevent the lower heating wire from being touched by the deformed and sunken lower radiation plate, and can also improve the installation and maintenance work efficiency of the lower thermocouple.

[0066] The technical solution of the present invention effectively solves the technical problem that the glass tempering heating furnace in the prior art cannot discharge heat in time, which easily causes glass cracking and furnace explosion accidents. It also solves the technical problem that the radiation plate in the prior art is easily deformed and touches the heating wire, causing the heating wire to be damaged or short-circuited to the ground, resulting in the need to immediately shut down the furnace for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a structural schematic diagram of a safe and controllable glass tempering heating furnace according to an embodiment of the present invention;

[0068] Figure 2 for Figure 1 Rear view of

[0069] Figure 3 for Figure 1 A schematic diagram of the structure of the refractory support seat;

[0070] Figure 4 for Figure 3 A cross-sectional view of

[0071] Figure 5 It is a schematic diagram of the installation structure of the refractory support seat and the lower heating wire;

[0072] Figure 6 for Figure 5 A partial enlarged view of part A in FIG.

[0073] Figure 7 It is a structural schematic diagram of a lifting mechanism of a safe and controllable glass tempering heating furnace;

[0074] Figure 8 for Figure 7 Right view of;

[0075] Fig. 9 for Figure 7 A front view of the left side portion of the

[0076] Fig.10 for Fig. 9 A partial enlarged view of part B;

[0077] Among them, the furnace body 1; the lower furnace frame 2; the refractory support seat 7; the wind pressure detection tube 9; the fan group 10; the wind cover 11; the conveying roller 12; the driving motor 31; the first reducer 32; the sprocket coupling 33; the commutator 34; the transmission roller 36; the latch 37 and the screw lifting frame 38; the lower radiation plate 41; the upper radiation plate 42; the lower heating wire 51; the upper heating wire 52; the lower thermocouple 61; the middle thermocouple 62; the upper thermocouple 63; the mounting groove 71; the mounting through hole portion 72; the first ceramic ring 81; the second ceramic ring 82; the front screw reducer 351; the rear screw reducer 352; the middle screw reducer 353; the screw sleeve 381; the screw 382; the latch hole 383; the cylindrical through hole portion 721 and the conical through hole portion 722. DETAILED DESCRIPTION

[0078] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0079] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] The following is combined with Figure 1-10 And specific implementation methods further illustrate the technical solution of the present invention.

[0082] A safe and controllable glass tempering heating furnace, comprising a plurality of heating units, wherein the heating units are installed in a furnace body 1, the furnace body 1 is mounted above a lower furnace frame 2, and a lifting mechanism is provided between the furnace body 1 and the lower furnace frame 2;

[0083] The heating unit comprises a fan unit 10, an upper heating module and a lower heating module arranged in sequence from top to bottom; the fan unit 10 comprises at least two horizontally arranged fans, the upper heating module comprises a plurality of upper heating wires 52 and a plurality of upper radiation plates 42, and the lower heating module comprises a plurality of lower heating wires 51 and a plurality of lower radiation plates 41 arranged from bottom to top;

[0084] The upper heating module and the lower heating module are respectively located above and below the conveying roller 12 for conveying the glass sheet to be tempered;

[0085] The upper heating module is provided with an upper thermocouple 63 and a middle thermocouple 62;

[0086] The upper thermocouple 63 is located between the fan unit 10 and the upper heating wire 52, and the upper thermocouple 63 is located between two adjacent fans; the middle thermocouple 62 is arranged below the lower plate surface of the upper radiation plate 42;

[0087] The lower heating module is provided with a lower thermocouple 61;

[0088] The upper end of the lower thermocouple 61 passes through the refractory support seat 7, and passes upward from the lower plate surface of the lower radiation plate 41 to the upper plate surface exposed on the lower radiation plate 41;

[0089] When the temperature difference measured by the upper thermocouple 63 , the middle thermocouple 62 and the lower thermocouple 61 exceeds a set threshold, the lifting mechanism is started to open the gap between the furnace body 1 and the lower furnace frame 2 .

[0090] The furnace body 1 and the lower furnace frame 2 of the embodiment of the present invention shown in the drawings are both bilaterally symmetrical structures.

[0091] like Figure 1-6 As shown, in the safe and controllable glass tempering heating furnace of the present invention, 3-4 upper heating wires 52 are set as a group, and an upper thermocouple 63 is provided below each group of upper heating wires 52; 3-4 lower heating wires 51 are set as a group, and a lower thermocouple 61 is provided in the middle of each group of lower heating wires 51, and at least one upper thermocouple 63 is provided between two adjacent fan units 10; the upper thermocouple 63, the middle thermocouple 62 and the lower thermocouple 61 are provided, and the heat source is relatively concentrated, and the temperature distribution in the heating furnace is monitored from multiple angles of top, middle and bottom in time, and the wind pressure in the heating unit is adjusted according to the actual temperature distribution, which can not only obtain better heating and energy-saving effects, but also avoid glass furnace explosion incidents.

[0092] The upper heating module is arranged below the wind cover 11 and above the lower heating module; the wind cover 11 can prevent the hot air from being emitted upward, thereby avoiding the loss of heat energy.

[0093] If the wind pressure is too high, the exhaust pipe used to balance the air pressure inside and outside the furnace may not discharge air fast enough, which will cause the air pressure inside the furnace to be too high and may cause dents on the glass surface, affecting the appearance quality of the tempered glass. On the contrary, if the wind pressure is too low, the heat of the upper heating wire 52 may not be dissipated in time, resulting in uneven temperature distribution in the furnace, which may easily lead to uneven heating of the tempered glass and cause furnace explosion, and also affect the service life of the upper heating wire 52.

[0094] When an abnormality occurs, that is, the temperature difference measured by the upper thermocouple 63, the middle thermocouple 62 and the lower thermocouple 61 exceeds the set threshold, the furnace body lifting mechanism is started, the gap between the furnace body 1 and the lower furnace frame 2 is opened, and heat is discharged from the gaps above and below the conveying roller 12 in time, which can avoid the accident of glass furnace explosion and reduce accident losses. The safe and controllable glass tempering heating furnace of the present invention not only has a multi-dimensional temperature monitoring function, but also is provided with a lifting mechanism that can open the gap between the furnace body 1 and the lower furnace frame 2 in time, and has good safety.

[0095] Preferably, a plurality of wind pressure detection tubes 9 are further provided between the upper radiation plate 42 and the conveying roller 12;

[0096] The pipe opening of the wind pressure detection tube 9 is arranged upward, and the pipe opening is located in the gap between the adjacent upper radiation plates 42; the wind pressure detection tube 9 is also equipped with a detection end of a wind pressure sensor.

[0097] By detecting the wind pressure at various locations and taking into account the uniformity of temperature distribution, the operating speed of the fan unit 10 is adjusted so that the fan unit 10 in the heating furnace maintains a wind pressure and wind speed that relatively matches the heat dissipation speed of the upper heating wire 52, thereby ensuring the quality of the output tempered glass products.

[0098] Preferably, the lower heating module further comprises the refractory support seat 7;

[0099] The fire-resistant support seat 7 is arranged between the lower radiation plate 41 and the lower heating wire 51;

[0100] The middle part of the lower radiation panel 41 is mounted on the top surface of the refractory support seat 7;

[0101] The upper part of the fire-resistant support seat 7 is provided with a downwardly recessed installation groove 71; the installation groove 71 is a U-shaped groove; the lower heating wire 51 is placed in the installation groove 71;

[0102] The distance between the top surface of the lower heating wire 51 and the bottom surface of the lower radiation plate 41 is greater than the diameter of the circle where the coiled lower heating wire 51 is located;

[0103] The width of the installation groove 71 in the left-right direction is greater than the diameter of the circle where the coiled lower heating wire 51 is located.

[0104] The metal lower radiation plate 41 will soften under high temperature conditions and bend downward, which may easily touch the lower heating wire 51, causing the lower heating wire 51 to short-circuit to the ground, or even burn out or break the lower heating wire 51, and may also cause damage to the solid-state relay connected to the heating wire 1, requiring immediate shutdown of the furnace for inspection and maintenance.

[0105] like Figure 2 and 3 As shown, the refractory support seat 7 is arranged between the lower radiation plate 41 and the lower heating wire 51; even if the lower radiation plate 41 is deformed at high temperature, it will not touch the lower heating wire 51. Therefore, the refractory support seat 7 of the present invention can protect the lower heating wire 51 from being touched by the deformed and sunken lower radiation plate 41, thereby avoiding shutdown for maintenance and reducing production losses, and has good safety performance.

[0106] The width of the installation groove 71 in the left and right directions is slightly larger than the diameter of the circumference of the coiled lower heating wire 51, which is convenient for the installation of the lower heating wire 51 and does not affect the heat dissipation of the lower heating wire 51. The lower heating wire 51 also has good installation stability; the distance between the top surface of the lower heating wire 51 and the bottom surface of the lower radiation plate 41 is larger than the diameter of the circumference of the coiled lower heating wire 51, which can ensure that the lower radiation plate 41 deformed by heat will not touch the lower heating wire 51, and has better safety.

[0107] Furthermore, the refractory support seat 7 is also provided with a mounting through hole portion 72;

[0108] The mounting through hole portion 72 is disposed on the groove wall between two adjacent mounting grooves 71; the mounting through hole portion 72 passes through the groove wall from bottom to top;

[0109] The mounting through hole portion 72 includes a cylindrical through hole portion 721 and a tapered through hole portion 722;

[0110] The cylindrical through hole portion 721 is located at the upper end of the mounting through hole portion 72, and the tapered through hole portion 722 with a smaller upper portion and a larger lower portion is located at the lower end of the mounting through hole portion 72;

[0111] The edge of the upper port of the cylindrical through hole portion 721 is located on the top surface of the refractory support seat 7; the lower port of the cylindrical through hole portion 721 is connected to the cone top port of the conical through hole portion 722;

[0112] The cone bottom port of the conical through hole portion 722 is located on the bottom surface of the refractory support seat 7;

[0113] The upper end of the lower thermocouple 61 is installed through the cylindrical through hole portion 721 and the tapered through hole portion 722 in sequence.

[0114] like Figure 1-6 As shown, the refractory support seat 7 provided with the installation through hole portion 72 can be directly installed at the original installation position of the lower thermocouple 61, without the need to set up an additional installation position, which is convenient for equipment modification.

[0115] The tapered through hole portion 722 has a guiding function. During installation, the lower thermocouple 61 can be directly inserted upward into the tapered through hole portion 722, so that the lower thermocouple 61 can be smoothly introduced into the cylindrical through hole portion 721, thereby improving the installation efficiency. The maintenance or inspection of the lower thermocouple 61 is more convenient, and the lower thermocouple 61 can be repaired or inspected without stopping the furnace, thereby improving the work efficiency of the installation and maintenance of the lower thermocouple 61.

[0116] Specifically, the lifting mechanism includes a driving device, a commutator 34, a front screw reducer 351, a rear screw reducer 352, a plurality of transmission rollers 36, a plurality of screw lifting frames 38 and a plurality of sprocket couplings 33;

[0117] The driving device is installed on the top of the furnace body 1; the two front screw reducers 351 and the two rear screw reducers 352 are respectively fixed to the four corners of the furnace body 1;

[0118] The screw lifting frames 38 are provided at the four corners close to the furnace body 1, and the lower ends of the four screw lifting frames 38 are respectively fixed to the top surfaces of the corresponding four corners of the lower furnace frame 2;

[0119] The screw lifting frame 38 is hollow, and a screw sleeve 381 and a screw 382 are arranged inside the screw lifting frame 38; the inner side of the screw sleeve 381 is provided with a rotating thread matching the outer side of the screw 382;

[0120] The commutator 34 is a three-axis commutator;

[0121] The output ends at the left and right ends of the driving device are respectively connected to the input shafts of the two oppositely arranged commutators 34;

[0122] The input end of each of the front screw reducers 351 is in driving connection with the first output shaft of the commutator 34 opposite to its rear end; the input end of each of the rear screw reducers 352 is in driving connection with the second output shaft of the commutator 34 opposite to its front end;

[0123] The output end of the front screw reducer 351 and the output end of the rear screw reducer 352 are respectively connected to the upper end of the screw 382 located at the corresponding position;

[0124] The sprocket coupling 33 is installed at both ends of the transmission roller 36; the two ends of the transmission roller 36 are respectively connected to the transmission of the input end or the output end close to them through the sprocket coupling 33.

[0125] like Figure 7-8 As shown, the safe and controllable glass tempering heating furnace of the present invention is provided with a lifting mechanism, and the driving device is provided with two front screw reducers 351 and two rear screw reducers 352 at the four front and rear corners to rotate through two commutators 34, thereby driving the screws 382 at the four corners to move up and down synchronously, and then driving the furnace body 1 to rise upward to open or downward to close the gap between it and the lower furnace frame 2, which is convenient for the maintenance and debugging of the internal facilities of the heating furnace. The power source of the screw 382 of the lifting mechanism is a screw reduction motor. The two devices that transmit each other are connected by a transmission roller 36 and a sprocket coupling 33, which can improve the axial concentricity between the two mutually connected transmission shafts, reduce offset interference, and make the two ends of the connection run more smoothly and smoothly, with the advantages of low noise and good stability. The screw 382 runs in a matching screw sleeve in the screw lifting frame 38, with high safety and stability, and can also improve the service life of the safe and controllable glass tempering heating furnace.

[0126] The commutator 34 used in the present invention is a three-axis commutator, which is a T series commutator, including two horizontal axes and one vertical axis. The vertical axis is an input axis and can be transmitted to two horizontal axes at the same time. The horizontal axis is an output axis.

[0127] Specifically, the driving device includes a driving motor 31 and a first reducer 32;

[0128] The output end of the driving motor 31 is transmission-connected to the input end of the first reducer 32, and the two output ends on the left and right sides of the first reducer 32 are transmission-connected to the input ends of the commutators 34 on the left and right sides through the transmission rollers 36 respectively;

[0129] The screw lift frame 38 is also provided with a latch hole 383 and a latch 37;

[0130] The pin hole 383 passes through the middle of the screw lifting frame 38 from left to right;

[0131] When the lower end of the screw rod 382 rises and approaches the upper part of the screw rod sleeve 381 , the latch pin 37 is inserted into the latch pin hole 383 , and the latch pin 37 is located below the lower end of the screw rod 382 .

[0132] like Figure 7 and 8 As shown, the driving motor 31 has good driving force. The first reducer 32 with two left and right output ends can output the power source to both sides synchronously, and the output torque is strong and stable.

[0133] like Fig. 9 and 10 As shown, when the furnace body 1 is raised to a high position, the latch 37 is inserted into the latch hole 383, which can further improve the safety of maintenance personnel, operating personnel and equipment when the inner cavity of the heating furnace is open.

[0134] The tail of the latch 37 is connected to one end of a chain, and the other end of the chain is suspended on the outer wall of the screw lift 38. When the latch 37 is not inserted into the latch hole 383, the latch 37 is suspended on the outer wall 37 of the screw lift 38 through the chain.

[0135] In some embodiments, the lifting mechanism further includes at least two intermediate screw reducers 353;

[0136] The two middle screw reducers 353 are symmetrically arranged between the two front screw reducers 351 and the two commutators 34;

[0137] The input end of the middle screw reducer 353 is connected to the first output shaft of the commutator 34 through a transmission roller; the output end of the middle screw reducer 353 is connected to the input end of the front screw reducer 351 through a transmission roller;

[0138] The screw lifting frames 38 are respectively provided near the middle of the left and right sides of the furnace body 1, and the lower ends of the two screw lifting frames 38 are respectively fixed to the upper top surfaces of the middle of the left and right sides of the lower furnace frame 2;

[0139] The output ends of the two middle screw reducers 353 are respectively connected to the upper ends of the screws 382 in the screw lifting frame 38 at the corresponding positions in a transmission manner;

[0140] The middle screw reducer 353 and the front screw reducer 351 , as well as the middle screw reducer 353 and the commutator 34 are respectively connected via transmission rollers 36 , and the sprocket couplings 33 are provided at both ends of the transmission rollers 36 .

[0141] If the furnace body 1 is long, two of the screw lifting frames 38 and two matching middle screw reducers 353 can be added in the middle of the furnace body 1 accordingly, which can reduce the load of the front screw reducer 351 and the rear screw reducer 352 located at the front and rear corners, improve the safety of the heating furnace during lifting, increase the application range of the safe and controllable glass tempering heating furnace, and ensure the service life of the transmission equipment.

[0142] Transmission rollers 36 and sprocket couplings 33 are also installed at both ends of the central screw reducer 353, which can make the transmission and lifting of the screw 382 at various positions have better synchronization effect and stability, and can correspondingly increase the safety and stability of the safe and controllable glass tempering heating furnace.

[0143] Preferably, it also includes a first ceramic ring 81 and a second ceramic ring 82;

[0144] The material of the refractory support seat 7 is refractory ceramic;

[0145] The first ceramic ring 81 and the second ceramic ring are respectively mounted on the top and the middle of the lower thermocouple 61;

[0146] The top end of the lower thermocouple 61 is exposed above the top end of the first ceramic ring 81; the lower end of the first ceramic ring 81 is inserted into the upper end of the cylindrical through hole 721;

[0147] The top end of the second ceramic ring 82 is inserted into the lower end of the cylindrical through hole portion 721 ; the lower end of the second ceramic ring 82 is located in the middle of the tapered through hole portion 722 .

[0148] like Figure 1-6 As shown, the top end of the lower thermocouple 61 is exposed above the top end of the first ceramic ring 81 to ensure the accuracy of the temperature measurement in the furnace.

[0149] The top and the middle of the lower thermocouple 61 are respectively provided with a first ceramic ring 81 and a second ceramic ring 82 , and the installation through hole 3 is installed, which can not only protect the lower thermocouple 61 from collision damage, but also improve the installation stability of the lower thermocouple 61 .

[0150] The material of the refractory support seat 7 is refractory ceramic, which also has insulating properties. The outer wall of the lower thermocouple 61 between the lower end of the first ceramic ring 81 and the top of the second ceramic ring 82 does not need to be covered with a ceramic ring, which can save costs.

[0151] Preferably, the thickness of the lower radiation plate 41 is 1-1.2 mm.

[0152] In order to reduce the deformation of the lower radiation panel 41, the thickness of the lower radiation panel 41 in the prior art is approximately 2 mm. The lower radiation panel 41 of the present invention is mounted on the top of the refractory support seat 7. The refractory support seat 7 has good supporting strength, which can effectively reduce the deformation of the lower radiation panel 41. Under the condition of ensuring the performance and service life of the lower radiation panel 41, the thickness of the lower radiation panel 41 is reduced to 1-1.2 mm, which can effectively save costs.

[0153] In some other embodiments, the lifting mechanism further includes four centrally mounted screw reducers 353;

[0154] The middle screw reducer 353 is provided between the front screw reducer 351 and the commutator 34 and between the rear screw reducer 352 and the commutator 34;

[0155] The input end of the middle screw reducer 353 located in front of the commutator 34 is in driving connection with the first output shaft of the commutator 34; the output end of the middle screw reducer 353 is in driving connection with the input end of the front screw reducer 351;

[0156] The input end of the middle screw reducer 353 located behind the commutator 34 is transmission-connected to the second output shaft of the commutator 34; the output end of the middle screw reducer 353 is transmission-connected to the input end of the rear screw reducer 352;

[0157] The four screw lifting frames 38 are respectively arranged near the left and right sides of the furnace body 1 at positions corresponding to the positions of the four middle screw reducers 353, and the lower ends of the four screw lifting frames 38 are respectively fixed to the top surfaces of the corresponding positions on the left and right sides of the lower furnace frame 2;

[0158] The output ends of the four middle screw reducers 353 are respectively connected to the upper ends of the four screws 382 at the corresponding positions in a one-to-one correspondence;

[0159] The front screw reducer 351 and the middle screw reducer 353, the middle screw reducer 353 and the commutator 34, and the middle screw reducer 353 and the rear screw reducer 352 are respectively connected through transmission rollers 36, and the sprocket couplings 33 are respectively provided at both ends of the transmission rollers 36;

[0160] The eight screw lifting frames 38 are symmetrically distributed around the furnace body 1 with the center of the furnace body 1 as the center point.

[0161] For a heating furnace with a furnace body 1 longer than 8 meters, or when the furnace body 1 has a large self-weight, the eight screw lifting frames 38 centrally and symmetrically distributed around the furnace body 1 not only have a good lifting speed, but also good safety, and the service life of the lifting mechanism is also long.

[0162] In order to reduce the load of the driving device and extend the service life of the equipment, the middle screw reducer 353 can also be set close to the commutator, and the ratio of the distance between the middle screw reducer 353 and the front screw reducer 351 to the distance between the middle screw reducer 353 and the commutator 34 is (3-5):1.

[0163] To sum up, in the above-mentioned embodiment of the present invention, the safe and controllable glass tempering heating furnace is provided with an upper thermocouple 63, a middle thermocouple 62 and a lower thermocouple 61, which not only has a multi-dimensional temperature monitoring function, but also is provided with a lifting mechanism that can timely open the gap between the furnace body 1 and the lower furnace frame 2, and has good safety.

[0164] The present invention also proposes a protective device for the lower heating wire 51 using the refractory support seat 7, which can effectively prevent the lower heating wire 51 from being touched by the deformed and sunken lower radiation plate 41, thereby avoiding shutdown for maintenance and reducing production losses, and can also improve the installation and maintenance work efficiency of the lower thermocouple 61.

[0165] The present invention also proposes a heating wire installation structure using the refractory support seat. The refractory support seat 7 is provided with a cylindrical through hole portion 721 and a conical through hole portion 722 which are connected up and down. The maintenance or inspection of the lower thermocouple 61 is more convenient. The lower thermocouple 61 can be repaired or inspected without stopping the furnace, which can improve the work efficiency of the installation and maintenance of the lower thermocouple 61.

[0166] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0167] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0168] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A safe and controllable glass tempering heating furnace, characterized in that: It comprises a plurality of heating units, wherein the heating units are installed in a furnace body, the furnace body is mounted above a lower furnace frame, and a lifting mechanism is provided between the furnace body and the lower furnace frame; The heating unit comprises a fan group, an upper heating module and a lower heating module arranged in sequence from top to bottom; the fan group comprises at least two horizontally arranged fans, the upper heating module comprises a plurality of upper heating wires and a plurality of upper radiation plates, and the lower heating module comprises a plurality of lower heating wires and a plurality of lower radiation plates arranged from bottom to top; the upper heating module and the lower heating module are respectively located above and below a conveying roller for conveying the tempered glass sheet; The upper heating module is provided with an upper thermocouple and a middle thermocouple; The upper thermocouple is located between the fan unit and the upper heating wire, and the upper thermocouple is located between two adjacent fans; the middle thermocouple is arranged below the lower plate surface of the upper radiation plate; the lower heating module comprises a refractory support seat and a lower thermocouple; the refractory support seat is arranged between the lower radiation plate and the lower heating wire; the middle part of the lower radiation plate is mounted on the top surface of the refractory support seat; the upper part of the refractory support seat is provided with a downwardly concave mounting groove; the mounting groove is a U-shaped groove; the lower heating wire is placed in the mounting groove; The upper end of the lower thermocouple passes through the refractory support seat and passes upward from the lower plate surface of the lower radiation plate through the upper plate surface exposed on the lower radiation plate; When the temperature difference measured by the upper thermocouple, the middle thermocouple and the lower thermocouple exceeds a set threshold, the lifting mechanism is started to open the gap between the furnace body and the lower furnace frame; The distance between the top surface of the lower heating wire and the bottom surface of the lower radiation plate is greater than the diameter of the circumference of the coiled lower heating wire; The width of the installation groove in the left-right direction is greater than the diameter of the circumference of the coiled lower heating wire; The lifting mechanism includes a driving device; the driving device is installed on the top of the furnace body; The driving device includes a driving motor and a first reducer; the output end of the driving motor is transmission-connected to the input end of the first reducer, and the two output ends on the left and right sides of the first reducer are transmission-connected to the input ends of the commutators on the left and right sides through transmission rollers respectively.

2. The safe and controllable glass tempering heating furnace according to claim 1, characterized in that: A plurality of wind pressure detection tubes are also provided between the upper radiation plate and the conveying roller; The pipe opening of the wind pressure detection tube is arranged upward, and the pipe opening is located in the gap between the adjacent upper radiation plates; the detection end of the wind pressure sensor is also installed in the wind pressure detection tube.

3. The safe and controllable glass tempering heating furnace according to claim 1, characterized in that: The refractory support seat is also provided with a mounting through hole portion; The installation through hole portion is arranged on the groove wall between two adjacent installation grooves; the installation through hole portion passes through the groove wall from bottom to top; The mounting through hole portion includes a cylindrical through hole portion and a tapered through hole portion; The cylindrical through hole portion is located at the upper end of the mounting through hole portion, and the tapered through hole portion which is smaller at the top and larger at the bottom is located at the lower end of the mounting through hole portion; The edge of the upper port of the cylindrical through hole portion is located on the top surface of the refractory support seat; the lower port of the cylindrical through hole portion is connected to the cone top port of the conical through hole portion; The conical bottom port of the conical through hole portion is located on the bottom surface of the refractory support seat; The upper end of the lower thermocouple is installed through the cylindrical through hole portion and the tapered through hole portion in sequence.

4. The safe and controllable glass tempering heating furnace according to claim 1, characterized in that: The lifting mechanism also includes a commutator, a front screw reducer, a rear screw reducer, a plurality of transmission rollers, a plurality of screw lifting frames and a plurality of sprocket couplings; The two front screw reducers and the two rear screw reducers are respectively fixed to the four corners of the furnace body; The screw lifting frames are provided at the four corners close to the furnace body, and the lower ends of the four screw lifting frames are respectively fixed to the top surfaces of the corresponding four corners of the lower furnace frame; The screw lifting frame is hollow, and a screw sleeve and a screw are arranged inside the screw lifting frame; the inner side surface of the screw sleeve is provided with a rotating thread matching the outer side surface of the screw; The commutator is a three-axis commutator; The output ends at the left and right ends of the driving device are respectively connected to the input shafts of the two oppositely arranged commutators; The input end of each of the front screw reducers is in transmission connection with the first output shaft of the commutator opposite to its rear end; the input end of each of the rear screw reducers is in transmission connection with the second output shaft of the commutator opposite to its front end; The output end of the front screw reducer and the output end of the rear screw reducer are respectively connected to the upper end of the screw located at the corresponding position; The sprocket coupling is installed at both ends of the transmission roller; the two ends of the transmission roller are respectively connected to the transmission of the input end or the output end close to them through the sprocket coupling.

5. The safe and controllable glass tempering heating furnace according to claim 4, characterized in that: The screw lifting frame is also provided with a latch hole and a latch; The latch hole passes through the middle of the screw lifting frame from left to right; When the lower end of the screw rod rises and approaches the upper part of the screw rod sleeve, the latch pin is inserted into the latch pin hole, and the latch pin is located below the lower end of the screw rod.

6. The safe and controllable glass tempering heating furnace according to claim 4, characterized in that: The lifting mechanism also includes at least two center-mounted screw reducers; The two middle screw reducers are symmetrically arranged between the two front screw reducers and the two commutators; The input end of the middle screw reducer is connected to the first output shaft of the commutator through a transmission roller; the output end of the middle screw reducer is connected to the input end of the front screw reducer through a transmission roller; The screw lifting frames are respectively provided at the middle of the left and right sides close to the furnace body, and the lower ends of the two screw lifting frames are respectively fixed to the upper top surfaces of the middle of the left and right sides of the lower furnace frame; The output ends of the two middle-mounted screw reducers are respectively connected to the upper ends of the screws in the screw lifting frames at corresponding positions; The middle screw reducer and the front screw reducer, as well as the middle screw reducer and the commutator are respectively connected through transmission rollers, and the sprocket couplings are provided at both ends of the transmission rollers.

7. The safe and controllable glass tempering heating furnace according to claim 3, characterized in that: Also included is a first ceramic ring and a second ceramic ring; The material of the refractory support seat is refractory ceramic; The first ceramic ring and the second ceramic ring are respectively mounted on the top and the middle of the lower thermocouple; The top end of the lower thermocouple is exposed above the top end of the first ceramic ring; the lower end of the first ceramic ring is inserted into the upper port of the cylindrical through hole; The top end of the second ceramic ring is inserted into the lower end of the cylindrical through hole portion; the lower end of the second ceramic ring is located in the middle of the tapered through hole portion.

8. The safe and controllable glass tempering heating furnace according to claim 1, characterized in that: The thickness of the lower radiation plate is 1-1.2 mm.

9. The glass tempering heating furnace according to claim 4, characterized in that: The lifting mechanism also includes four center-mounted screw reducers; The middle screw reducer is provided between the front screw reducer and the commutator, and between the rear screw reducer and the commutator; The input end of the middle screw reducer located in front of the commutator is drivingly connected to the first output shaft of the commutator; the output end of the middle screw reducer is connected to the input end of the front screw reducer; The input end of the middle screw reducer located behind the commutator is transmission-connected to the second output shaft of the commutator; the output end of the middle screw reducer is transmission-connected to the input end of the rear screw reducer; The four screw lifting frames are respectively arranged near the left and right sides of the furnace body at positions corresponding to the positions of the four middle screw reducers, and the lower ends of the four screw lifting frames are respectively fixed to the top surfaces of the corresponding positions on the left and right sides of the lower furnace frame; The output ends of the four middle-mounted screw reducers are respectively and one by one connected to the upper ends of the four screws at the corresponding positions; The front screw reducer and the middle screw reducer, the middle screw reducer and the commutator, and the middle screw reducer and the rear screw reducer are respectively connected through transmission rollers, and the sprocket couplings are respectively provided at both ends of the transmission rollers; The eight screw lifting frames are symmetrically distributed around the furnace body with the center of the furnace body as the center point.

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