CN106746551B

CN106746551B - High-efficient glass softening furnace

Info

Publication number: CN106746551B
Application number: CN201710112411.3A
Authority: CN
Inventors: 胡耿政; 施鹏鸿
Original assignee: Hubei Huayang Glass Co ltd
Current assignee: Hubei Huayang Glass Co ltd
Priority date: 2017-02-28
Filing date: 2017-02-28
Publication date: 2022-11-22
Anticipated expiration: 2037-02-28
Also published as: CN106746551A

Abstract

A high-efficiency glass softening furnace comprises a heating furnace body, heating components and an automatic locking mechanism, wherein the heating components and the automatic locking mechanism are uniformly distributed on the heating furnace body along the length direction, the heating components are heating pipes which are mutually connected in parallel, and the upper ends of the heating pipes extend out of the furnace body and are connected with an external temperature control device; the automatic locking mechanism (3) comprises a plurality of fire-resistant doors arranged on one side of the heating furnace body, the fire-resistant doors are connected with a cylinder on the other side of the heating furnace body through a traction mechanism, the front ends of the cylinders are connected with the material receiving rods, and the material receiving rods correspond to material openings in the fire-resistant doors one to one. According to the efficient glass softening furnace provided by the invention, the linked material receiving rods and the fire-resistant doors are arranged in an array manner, so that the production efficiency can be accelerated, the equipment structure is relatively simplified, and the later-stage maintenance is convenient.

Description

High-efficient glass softening furnace

Technical Field

The invention relates to a softening furnace, in particular to a high-efficiency glass softening furnace.

Background

The mass production of the craft glass products needs to be softened and shaped after the glass rods are cut, and the glass rods can be softened only by the temperature as high as 1000 ℃. The technical glass softening furnace (refer to the patent with the application number of '2016200525818') used by the company needs to manually place the semi-finished glass product in the upper cavity of the glass softening furnace during the production process, and then the semi-finished glass product is conveyed to a lower high-temperature furnace for softening through a lifting mechanism in the furnace. Therefore, the upper placing cavity needs to be added in the design of the softening furnace, and the placing cavity and the furnace wall are opened and closed through the automatic opening and closing mechanism. Firstly, the main driving mechanism is arranged in the furnace body in the design, so that the influence of high temperature is great, the service life is short, and the replacement is inconvenient. Secondly, the opening and closing of the heat-insulating door and the lifting of the feeding rod are controlled by different driving mechanisms respectively, so that not only is energy consumed, but also better coordinated control is required, the complexity of equipment control is increased, and the error probability is increased; in addition, the capacity is small, and only a single operation or a plurality of operations can be performed around, so that heat, manpower and the like are wasted greatly.

Disclosure of Invention

The invention aims to solve the technical problem of providing the high-efficiency glass softening furnace, which can soften in batches and accelerate the production efficiency, and has relatively simplified equipment structure and convenient later maintenance.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a high-efficiency glass softening furnace comprises a heating furnace body, heating components and an automatic locking mechanism, wherein the heating components and the automatic locking mechanism are uniformly distributed on the heating furnace body along the length direction, the heating components are heating pipes which are mutually connected in parallel, and the upper ends of the heating pipes extend out of the furnace body and are connected with an external temperature control device; the automatic locking mechanism comprises a plurality of fire-resistant doors arranged on one side of the heating furnace body, the fire-resistant doors are connected with a cylinder on the other side of the heating furnace body through a traction mechanism, the front ends of the cylinders are connected with the material receiving rods, and the material receiving rods are in one-to-one correspondence with material openings at the fire-resistant doors.

The traction mechanism comprises a slide bar connected with the fire-resistant door, the slide bar slides up and down along the heating furnace body, pulleys are installed at the bottom end of the slide bar and the bottom end of the heating furnace body, a steel wire rope is wound on the hook seat around the pulleys, and the hook seat is arranged on the slide rail in a sliding mode and driven through an air cylinder.

The heating furnace body comprises a metal outer shell, a heat insulation layer and a fire-resistant layer, wherein the heat insulation layer is made of asbestos materials, and the fire-resistant layer is made of refractory bricks made of silicon carbide materials.

A plurality of thermocouple temperature control points are arranged on the heating furnace body, and the thermocouple temperature control points are distributed alternately and equidistantly from top to bottom.

The material receiving rod is internally provided with a hollow cavity, and the end of the hollow cavity is communicated with a cooling water pipe to jointly form a circulating cooling pipeline.

The material receiving rod comprises a front end material receiving portion, a middle section heat-resistant portion and a rear end connecting portion, wherein the front end material receiving portion is opened to form a supporting nozzle, the supporting nozzle is opposite to a feeding hole in the softening furnace, and the rear end connecting portion is connected with the air cylinder and extends into and out of the air cylinder.

The connecting part is connected with the hook seat through a connecting seat and a bolt, the connecting seat comprises an upper clamping plate and a lower clamping plate, one end of the upper clamping plate is hinged with one end of the lower clamping plate, and the other end of the upper clamping plate is locked through a clamping pin.

And a chromium-aluminum alloy electric heating wire is adopted in the heating pipe.

The invention relates to a high-efficiency glass softening furnace, which has the following technical effects:

1) By arranging the material receiving rod with the cooling circulation inside and the U-shaped structure outside, the problem that the material receiving rod cannot be used due to oxidation deformation under the high-temperature condition can be avoided; meanwhile, the lower temperature also avoids safety accidents caused by the fact that the cold glass semi-finished product is cracked when meeting high temperature when the glass semi-finished product is placed; on the other hand, the material receiving rod can be matched with the shape of a glass semi-finished product, is convenient to clamp, and is supported, placed and heated for softening.

2) The fire-resistant door is arranged outside the furnace body, the lifting is realized by utilizing the steel wire rope and the gravity of the fire-resistant door to complete the opening or closing, and meanwhile, the material receiving rod can extend into and extend out in a linkage manner to coordinate the operation. Because this mechanism all is externally, each mechanism all avoids receiving high temperature to influence, increase of service life, and convenient maintenance and change.

3) Through setting up rectangular furnace body, utilize parallelly connected heating pipe to heat, set up opening and close feed mechanism of array, like this, can change independent single furnace body into batch operation, not only improve the operating efficiency, moreover because everywhere temperature is comparatively even, the product quality of softening back hot pressing is higher, has the uniformity, and when a problem appearing, other still can carry out the operation, avoids shutting down the maintenance, guarantees the reliability of production.

Drawings

The invention is further illustrated with reference to the following figures and examples:

fig. 1 is an external structural view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a schematic view of the internal structure of the present invention.

Fig. 4 is a schematic view of the receiving rod of the present invention.

Fig. 5 is a schematic view of the connecting socket of the present invention.

FIG. 6 is a schematic view of a bayonet of the present invention.

In the figure: the device comprises a heating furnace body 1, a heating assembly 2, an automatic locking mechanism 3, a fire-resistant door 4, an air cylinder 5, a material receiving rod 6, a material receiving part 6-1, a heat-resistant part 6-2, a connecting part 6-3, an upper clamping plate 6-4, a lower clamping plate 6-5, a pin hole 6-6, a mounting groove 6-7, an L-shaped connecting seat 6-8, a metal outer shell 7, a heat insulating layer 8, a fire-resistant layer 9, a thermocouple temperature control point 10, a sliding rod 11, a pulley 12, a steel wire rope 13, a hook seat 14, a cooling water pipe 15, a pin pipe 16, a steel ball 17, a material pushing rod 18 and an end cap 19.

Detailed Description

As shown in figures 1-5, the high-efficiency glass softening furnace comprises a heating furnace body 1 and a heating furnace body 1, wherein heating components 2 and an automatic locking mechanism 3 are uniformly distributed along the length direction, the heating components 2 are heating pipes which are connected in parallel, and the heating pipes are equidistantly distributed in the heating furnace body 1, so that the heating pipes are conveniently uniformly heated in a larger space, and the heating efficiency is improved. In order to monitor the temperature of each part in real time, a plurality of thermocouple temperature control points 10 can be arranged in the furnace body 1, the thermocouple temperature control points 10 are distributed alternately and equidistantly up and down, and the thermocouple is used for detecting and controlling the current interruption of the heating circuit through a control system so as to realize heating or heat preservation. Because the heating pipes are connected in parallel, the thermocouple temperature control point mounting point has certain independence, and the thermocouple temperature control point mounting point corresponds to the heating pipe position, so when the temperature of a certain position is out of a specified temperature range, local control can be realized, and local overheating is avoided.

The automatic locking mechanism 3 comprises a plurality of fire-resistant doors 4 arranged on one side of the heating furnace body 1, and the fire-resistant doors 4 are made of nickel-based alloy materials. The nickel-based alloy material belongs to a high-temperature resistant material and ensures long service life. The fire door 4 slides up and down along the heating furnace body 1 through the slide bar 11, the pulley 12 is installed to the slide bar 11 bottom and the heating furnace body 1 bottom, and wire rope 13 walks around the pulley 12 and twines on the couple seat 14, and the pulley not only has the traction effect, still can make wire rope keep away from the high temperature furnace body simultaneously, avoids the high temperature influence. The hook seat 14 is arranged on the slide rail in a sliding way and is driven by the air cylinder 5. And the material receiving rod 6 is installed at the upper end of the hook seat 14, when the air cylinder 5 drives the hook seat 14 forwards, the material receiving rod 6 gradually extends forwards, and when the fire-resistant door 4 slides downwards to a certain position, the end of the material receiving rod 6 just extends out of the material opening. When the softening furnace works, the control cabinet controls the piston rod of the air cylinder to be pushed out, the steel wire rope moves forwards in the idler wheel, and the sliding rod automatically slides downwards under the action of gravity due to the fact that the sliding rod loses the tensile effect of the steel wire rope, so that the softening furnace is opened. This structure has several advantages: 1) The structure is external, and each mechanism is prevented from being influenced by high temperature, so that the service life is prolonged, and the replacement times are reduced; 2) The drive of the fire-resistant door and the receiving rod is linked, the whole action is unified and coordinated, and compared with the original independent door opening and receiving rod lifting, the action is simplified, and the possibility of more errors caused by too many control programs is reduced; 3) Only need wire rope traction, and all externally, but not only automatic operation still can carry out manual operation when the power failure state. 4) When the cylinder is pushed out to drive the fireproof door to slide downwards to open the material port, the bracket is pushed out simultaneously to prepare for discharging, so that the discharging can be continuously and rapidly carried out, heat dissipation in the high-temperature furnace is avoided, and meanwhile, the heat outflow is reduced to cause influence (overhigh temperature in summer) to the working environment of workers.

In addition, set up furnace body 1 to the rectangle, be equipped with a plurality of material mouths along length direction equidistance on the furnace body 1, establish fire-resistant door on the material mouth, fire-resistant door sets up the material receiving rod opposite. When the cylinder 5 advances, the fire-resistant door moves downwards under the action of gravity, the material receiving rod extends out simultaneously, the glass product is put in, and the cylinder returns to perform multi-group operation. Since the distance speed and the like can be realized by controlling the system to operate the gas valve, the condition can be provided for batch automation operation.

The heating furnace body 1 comprises a metal outer shell 7, a heat insulation layer 8 and a fire-resistant layer 9, wherein the heat insulation layer 8 is made of asbestos materials, and the fire-resistant layer 9 is made of refractory bricks made of silicon carbide materials. Because the refractory brick made of the silicon carbide has the advantages of alkali resistance, acid resistance, thermal shock resistance, small thermal expansion coefficient, good thermal conductivity and the like, the refractory brick can resist the high temperature of 1650 ℃ to the maximum. Therefore, the adaptability of the device to the high-temperature condition required by glass manufacturing can be effectively improved, the complementary energy and the waste heat are fully utilized, and the effect of secondary utilization of resources is achieved.

The material receiving rod 6 is internally provided with a hollow cavity, and the end of the hollow cavity is communicated with the cooling water pipe 15 to form a circulating cooling pipeline together. Therefore, the temperature of the material receiving rod 1 cannot rise to a high level even in a high-temperature furnace, and deformation and oxidation of the material receiving rod at a high temperature of more than 1000 ℃ for a long time are avoided.

The material receiving rod 6 comprises a front end material receiving part 6-1, a middle section heat-resistant part 6-2 and a rear end connecting part 6-3, wherein the front end material receiving part 6-1 is opened to form a support mouth, a plurality of limiting grooves are uniformly distributed on the support mouth, and can limit the sliding of the glass semi-finished product in an initial state and ensure the stable in and out. Because the size of the upper end of the glass semi-finished product is large, the size of the lower end of the glass semi-finished product is small, the glass semi-finished product can be well supported and limited through the support nozzle, and the support nozzle is over against a feed inlet on the softening furnace. The high-temperature-resistant graphite sleeve is sleeved outside the middle-section heat-resistant part 6-2, so that the overall performance of the supporting part of the material receiving rod can be ensured, local deformation caused by overlong length is avoided, and the strength is improved. The rear end connecting part 6-3 is connected with the cylinder 5 and extends into and out of the cylinder 5.

The connecting part 6-3 is in bolted connection with the hook seat 14 through a connecting seat, the connecting seat comprises an upper clamping plate 6-4 and a lower clamping plate 6-5, one end of the upper clamping plate 6-4 and one end of the lower clamping plate 6-5 are hinged with each other, the other end of the upper clamping plate 6-4 and the other end of the lower clamping plate 6-5 are locked in the pin hole 6-6 through a clamping pin, and the material receiving rod 6 is arranged in the mounting groove 6-7; in order to facilitate connection, the bottom end of the lower clamping plate 6-5 is provided with L-shaped connecting seats in mirror symmetry, and the L-shaped connecting seats 6-8 can be used for conveniently reserving spaces at two ends for locking upper and lower parts.

As shown in fig. 6, the latch includes a pin tube 16, a ball hole is provided at the lower end of the pin tube 16, a steel ball 17 is provided at the ball hole, and can partially extend out of the ball hole, a material pushing rod 18 is provided in the pin tube 16, an annular groove is provided at the lower end of the material pushing rod 18, the steel ball 17 can be accommodated in the annular groove, an external thread is provided at the top end of the pin tube 16, the pin tube 16 is connected with an end cap 19 through the external thread, a groove is provided at the center of the end cap 19, and the upper end of the material pushing rod 18 is connected with the groove through a spring. The material pushing rod 18 is connected with the end cap 19 through the hook by a spring in advance, then the material pushing rod 18 is inserted into the pin tube 16, the upper end of the pin tube 16 is in threaded connection with the end cap 19, the screwing-in depth is determined according to the thicknesses of the upper clamping plate and the lower clamping plate, and the distance from the lower end face of the end cap 19 to the steel ball 17 is equal to the thicknesses of the upper clamping plate and the lower clamping plate. When the device works, the bayonet lock is directly inserted, the lower end face of the end cap 19 is in contact with the upper clamping plate, the upper end of the material pushing rod 18 is extruded, the steel ball 17 extends out through the circular hole part, then the hand is released, and the steel ball 17 realizes the limiting and locking of the lower end. The locking of the upper clamping plate and the lower clamping plate is ensured. In order to ensure the locking reliability, a bulge can be arranged at the end of the steel ball.

Because the temperature of material receiving rod in the furnace body is higher, though carry out the water-cooling, still there is higher temperature on material receiving rod surface, through setting up the bayonet lock, usable other pressing means dismantle fast, need not the direct touching of people's hand, when carrying out local maintenance, need not to shut down the stove and can carry out quick replacement, reduce the change time, guarantee production efficiency. The maintenance and the repair are carried out in batches at the later stage, which is very convenient.

In addition, because the heating wire in the traditional U-shaped heating pipe has low heat resistance, the heating wire can be damaged quickly in a furnace body with the temperature of over 1000 ℃ and the bent part is easy to break. Through a plurality of tests, the maximum operation temperature of the chromium-aluminum alloy electric heating wire can reach 1400 ℃, the heat conductivity coefficient is 60.3KJ/m.h ℃, and the resistivity is 1.09+0.05 mu omega.m, the electric heating wire made of the material can adapt to the production of glass lenses by replacing the electric heating wire of the softening furnace, the service life is long, the surface compounding is high, and the oxidation resistance is better. In addition, in order to avoid the fracture of the bending part, the thickness of the straight pipe part of the U-shaped heating pipe is smaller than that of the bent pipe part.

The working principle and the process are as follows: the cylinders 5 are controlled to extend forwards in sequence by controlling the programming, and the fire-resistant doors of the array are opened in sequence. Manually or mechanically placing the glass semi-finished product on the material receiving rod 6, and after a few seconds, retracting the air cylinder 5 for softening. After a period of time, the cylinder extends forwards, the fire-resistant door is opened, and the fire-resistant door is taken away manually or mechanically. The whole device constitutes a softening line. Because the hot pressing device completes one-time stamping for a short time, softening and hot pressing operations can be carried out in a many-to-one mode through reasonable time budget, so that the production efficiency can be greatly improved, long-distance walking is not needed, and the labor intensity is reduced.

Claims

1. The utility model provides a high-efficient glass softening furnace which characterized in that: the heating furnace comprises a heating furnace body (1), wherein heating components (2) and an automatic locking mechanism (3) are uniformly distributed on the heating furnace body (1) along the length direction, the heating components (2) are heating pipes which are connected in parallel, and the upper ends of the heating pipes extend out of the furnace body and are connected with an external temperature control device; the automatic locking mechanism (3) comprises a plurality of fire-resistant doors (4) arranged on one side of the heating furnace body (1), the fire-resistant doors (4) are connected with an air cylinder (5) on the other side of the heating furnace body (1) through a traction mechanism, the front ends of the air cylinders (5) are connected with the material receiving rods (6), and the material receiving rods (6) correspond to material openings in the fire-resistant doors (4) one by one;

the material receiving rod (6) comprises a front end material receiving part (6-1), a middle section heat-resistant part (6-2) and a rear end connecting part (6-3), wherein the front end material receiving part (6-1) is opened to form a nozzle, the nozzle is opposite to a feed inlet on the softening furnace, and the rear end connecting part (6-3) is connected with the air cylinder (5) and extends into and out of the air cylinder (5);

the connecting part (6-3) is in bolted connection with the hook seat (14) through a connecting seat, the connecting seat comprises an upper clamping plate (6-4) and a lower clamping plate (6-5), one end of the upper clamping plate (6-4) and one end of the lower clamping plate (6-5) are hinged with each other, and the other end of the upper clamping plate and the other end of the lower clamping plate are locked through a clamping pin;

the clamping pin comprises a pin tube (16), a steel ball (17), a material pushing rod (18) and an end cap (19), the material pushing rod (18) is arranged in the pin tube (16) and can push the steel ball (17) to partially extend out of the pin tube (16), the end cap (19) is in threaded connection with the upper end of the pin tube (16), and the end of the end cap is in spring connection with the material pushing rod (18).

2. A high efficiency glass softening furnace as claimed in claim 1, wherein: the traction mechanism comprises a sliding rod (11) connected with the fire-resistant door (4), the sliding rod (11) slides up and down along the heating furnace body (1), pulleys (12) are installed at the bottom end of the sliding rod (11) and the bottom end of the heating furnace body (1), a steel wire rope (13) winds around the pulleys (12) and is wound on a hook seat (14), and the hook seat (14) is arranged on the sliding rail in a sliding mode and driven through an air cylinder (5).

3. A high efficiency glass softening furnace as claimed in claim 1, wherein: the heating furnace body (1) comprises a metal outer shell (7), a heat-insulating layer (8) and a fire-resistant layer (9), wherein the heat-insulating layer (8) is made of asbestos materials, and the fire-resistant layer (9) is made of refractory bricks made of silicon carbide materials.

4. A high efficiency glass softening furnace as claimed in claim 1, wherein: a plurality of thermocouple temperature control points (10) are arranged on the heating furnace body (1), and the thermocouple temperature control points (10) are distributed alternately and equidistantly from top to bottom.

5. A high efficiency glass softening furnace as claimed in claim 1, wherein: the material receiving rod (6) is internally provided with a hollow cavity, and the end of the hollow cavity is communicated with a cooling water pipe (15) to jointly form a circulating cooling pipeline.

6. A high efficiency glass softening furnace as claimed in claim 1, wherein: the heating tube is internally provided with a chromium-aluminum alloy heating wire.