Automatic slag pushing device for float glass tin bath

Abstract

The utility model discloses a kind of automatic slag pushing devices of float glass tin bath, comprising: rack, pneumatic motor, transmission mechanism, push rod assembly, overturning slag gathering mechanism and pneumatic control system;The power output shaft of the pneumatic motor is connected with transmission mechanism;The push rod assembly is connected with transmission mechanism;The overturning slag gathering mechanism includes slag pushing component, overturning support and overturning cylinder;The cylinder body of the overturning cylinder is installed on push rod assembly, its piston rod is hinged with overturning support by pull rod, and the slag pushing component is installed on overturning support;The pneumatic control system is connected with pneumatic motor and overturning cylinder by air pipe.The utility model can replace artificial automatic completion and advance, gather slag, overturn, retreat, reset and a series of actions, action is stable and reliable, effectively reduce the labor intensity of worker, reduce the opening times of tin bath, thereby stabilize tin bath internal working condition, improve glass product quality, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of float glass production equipment, and in particular to an automatic slag pushing device for float glass tin bath. Background Technology

[0002] In the float glass production process, the tin bath plays a crucial role in glass forming. Molten glass is formed on the surface of molten tin in the tin bath, so the tin bath is of paramount importance to the quality of glass products.

[0003] During production and equipment maintenance, molten tin in the solder bath inevitably comes into contact with air, forming tin oxides, or tin dross. This dross floats on the surface of the molten tin and accumulates at the outlet of the solder bath through the flow of the molten tin. If it is not cleaned in time, it will seriously affect the surface quality of the glass plate.

[0004] Currently, the main method for cleaning solder dross relies on manual operation. Operators need to periodically open the observation window of the solder bath, use tools to push and pile up the solder dross, and then rake it away. This method has many drawbacks: 1. The labor intensity is high and the efficiency is low. In particular, as the kiln age increases, the amount of tin slag produced increases, requiring more frequent slag pushing operations.

[0005] 2. Frequently opening the observation window will cause the molten solder to come into contact with air, resulting in more solder dross and creating a vicious cycle; 3. The force, speed and frequency of manual slag pushing are difficult to maintain, which can easily cause fluctuations in the molten tin surface and affect the glass quality. Utility Model Content

[0006] This invention provides an automatic slag pushing device for float glass tin baths, which solves the problems existing in the removal of tin slag in the prior art. It can automatically, stably and efficiently complete the slag pushing operation and minimize the disturbance of the molten tin surface.

[0007] To solve the above-mentioned technical problems, this utility model provides an automatic slag pushing device for float glass tin bath, characterized in that it includes: a frame, a pneumatic motor, a transmission mechanism, a push rod assembly, a slag-collecting and tilting mechanism, and a pneumatic control system; The pneumatic motor and the transmission mechanism are respectively mounted and fixed on the frame, and the power output shaft of the pneumatic motor is connected to the transmission mechanism. The push rod assembly is connected to the transmission mechanism and performs synchronous reciprocating linear motion under the drive of the transmission mechanism; The slag-collecting and tilting mechanism includes a slag-pushing component, a tilting bracket, and a tilting cylinder; the cylinder body of the tilting cylinder is mounted on the push rod assembly, and its piston rod is hinged to the tilting bracket via a pull rod; the slag-pushing component is mounted on the tilting bracket. The pneumatic control system is connected to the pneumatic motor and the tilting cylinder via an air pipe, enabling the slag pushing component to automatically perform pushing, tilting, retraction and resetting actions according to a preset stroke.

[0008] In a preferred embodiment of this utility model, the transmission mechanism includes a lead screw guide pair and a slider; the lead screw guide pair is fixedly installed on the top of the frame, and its lead screw is rotatably supported on the frame; the slider is fitted onto the lead screw and threadedly engaged with the lead screw; the output shaft of the pneumatic motor is drivenly connected to one end of the lead screw to drive the lead screw to rotate, thereby driving the slider to reciprocate linearly along the axial direction of the lead screw.

[0009] In a preferred embodiment of this utility model, the push rod assembly is a hollow push rod, the tail of the hollow push rod is fixedly connected to the slider, and the pull rod passes through the internal cavity of the hollow push rod.

[0010] In a preferred embodiment of this utility model, the slag pushing component is a graphite plate, which is fixed to the end of the flipping bracket by bolts.

[0011] In a preferred embodiment of the present invention, the pneumatic control system includes a pneumatic logic control element connected via an air pipe. The pneumatic logic control element comprises a first pneumatic position sensor, a second pneumatic position sensor, and a reversing valve assembly. The pneumatic logic control element is connected to an air source, the pneumatic motor, and the tilting cylinder via an air pipe.

[0012] In a preferred embodiment of this utility model, the first pneumatic position sensor and the second pneumatic position sensor are mechanical rolling valves, which are respectively mounted on the guide rail of the lead screw guide pair via mounting bases, and respectively correspond to the end and start positions of the slag pushing stroke.

[0013] In a preferred embodiment of the present invention, the reversing valve group includes a first two-position five-way pneumatic control valve and a second two-position five-way pneumatic control valve; the first two-position five-way pneumatic control valve is connected to the air inlet of the pneumatic motor through an air pipe; the second two-position five-way pneumatic control valve is connected to the two air ports of the tilting cylinder through an air pipe.

[0014] In a preferred embodiment of this utility model, a first throttle valve is connected in series on the air supply line of the pneumatic motor; and a second throttle valve is connected in series on the air supply line of the tilting cylinder.

[0015] In a preferred embodiment of the present invention, the pneumatic control system further includes a safety interlock unit, which includes a dual-pressure valve, a first limit valve, and a second limit valve. The first and second limit valves are mechanical limit valves, which are fixed to the lead screw guide pair by the mounting base and located at the extreme positions outside the first and second pneumatic position sensors; the output ports of the first and second limit valves are connected to the input port of the dual-pressure valve through air pipes; the output port of the dual-pressure valve is connected to the first two-position five-way pneumatic control valve and the second two-position five-way pneumatic control valve through air pipes respectively.

[0016] In a preferred embodiment of this utility model, the two input ports of the dual-pressure valve are connected to the output ports of the first pneumatic position sensor and the second pneumatic position sensor respectively via air pipes.

[0017] The beneficial effects of this utility model are as follows: This utility model provides an automatic slag pushing device for float glass tin baths. Through the design of the frame, pneumatic motor, transmission mechanism, push rod assembly, slag-gathering mechanism, and pneumatic control system, it constitutes a complete automated slag pushing device. It can replace manual labor to automatically complete a series of actions such as pushing, slag gathering, turning, retraction, and resetting. The operation is stable and reliable, effectively reducing the labor intensity of workers, reducing the number of times the tin bath is opened, thereby stabilizing the internal working conditions of the tin bath, improving the quality of glass products, and is highly practical. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of an automatic slag pushing device for float glass tin bath according to the present invention; Figure 2 This is a schematic diagram of the pneumatic control system shown. The components in the attached diagram are labeled as follows: 1. Frame, 2. Pneumatic motor, 3. Screw guide pair, 4. Slider, 5. Hollow push rod, 6. Tilting bracket, 7. Tilting cylinder, 8. Graphite plate, 9. Tie rod, 10. Dual pressure valve, 11. First limit valve, 12. Second limit valve, 13. First rolling valve, 14. Second rolling valve, 15. First pneumatic control valve, 16. Second pneumatic control valve, 17. First throttle valve, 18. Second throttle valve. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] Example 1 like Figure 1 As shown, this utility model provides an automatic slag pushing device for float glass tin baths, whose mechanical structure mainly includes: a frame 1, a pneumatic motor 2, a transmission mechanism, a push rod assembly, a slag-collecting mechanism, and a pneumatic control system.

[0021] The frame 1 is welded from steel profiles and forms the supporting skeleton of the entire device. It is fixedly installed at an appropriate position near the outlet of the solder bath by anchor bolts. The bottom surface is also equipped with height-adjustable feet and shock-absorbing pads to effectively isolate and absorb the vibration generated during equipment operation, prevent the vibration from being transmitted to the precision solder bath, and directly help stabilize the working conditions of the solder bath and reduce the fluctuation of the solder surface.

[0022] The transmission mechanism employs a lead screw and guide rail assembly 3, comprising a precision lead screw, two parallel guide rails, and a slider 4. The lead screw and guide rail assembly 3 is bolted to the top of the frame 1. The lead screw is rotatably supported on the frame 1 via bearing seats. The slider 4 is fitted onto the lead screw and engages with its thread, allowing it to perform high-precision reciprocating linear motion along the guide rails under the drive of a pneumatic motor.

[0023] The pneumatic motor 2 is fixedly mounted on the end of the frame 1 via a flange, and its output shaft is coaxially driven to one end of the lead screw of the lead screw guide rail pair 3 via a coupling. When the pneumatic motor 2 receives compressed air and rotates, it directly drives the lead screw to rotate, and then drives the slider to reciprocate linearly along the guide rail through thread engagement.

[0024] The push rod assembly is a hollow push rod 5. This hollow push rod 5 is made of high-temperature resistant stainless steel tubing, and its tail is fixedly connected to the slider 4 via a connecting plate. Therefore, the hollow push rod 5 can reciprocate linearly synchronously with the slider 4.

[0025] The slag-flipping mechanism includes a slag-pushing component, a flipping bracket 6, and a flipping cylinder 7. The slag-pushing component is a high-temperature resistant graphite plate 8 with good compatibility with molten tin, which is bolted to the end of the flipping bracket 6. The cylinder body of the flipping cylinder 7 is fixed to the front end of the hollow push rod 5 by a U-shaped clamp. A pull rod 9 passes through the internal cavity of the hollow push rod 5. One end of the pull rod 9 is hinged to the piston rod end of the flipping cylinder 7, and the other end is hinged to the middle of the flipping bracket 6. When the piston rod of the flipping cylinder 7 extends or retracts, it pulls the flipping bracket 6 through the pull rod 9, causing it to rotate around the hinge point at the end of the hollow push rod 5, thereby realizing the lifting (flipping) or lowering (resetting) action of the graphite plate 8.

[0026] like Figure 2As shown, the pneumatic control system is driven by factory compressed air. After filtration, pressure reduction, and lubrication, the air source is stabilized at a working pressure of approximately 0.4~0.6 MPa. The system uses pneumatic logic components, which are connected by air pipes to form a complete control loop. The pneumatic logic components mainly consist of a first rolling valve 13, a second rolling valve 14, a first two-position five-way pneumatic control valve 15, a second two-position five-way pneumatic control valve 16, a first throttle valve 17, a second throttle valve 18, a dual-pressure valve 10, a first limit valve 11, and a second limit valve 12.

[0027] The first roller valve 13 and the second roller valve 14 are mechanical two-position three-way roller valves, which are fixed on the guide rail of the lead screw guide rail pair 3 by adjustable mounting seats. Their positions correspond to the end (first preset position) and the beginning (second preset position) of the slag pushing stroke, respectively, serving as the first pneumatic position sensor and the second pneumatic position sensor.

[0028] The first two-position five-way pneumatic control valve 15 and the second two-position five-way pneumatic control valve 16 constitute a reversing valve group. The first two-position five-way pneumatic control valve 15 is connected to the two air inlets of the pneumatic motor 2 via an air pipe, and is used to control the forward and reverse rotation of the pneumatic motor 2. The second two-position five-way pneumatic control valve 16 is connected to the two air ports of the tilting cylinder 7 via an air pipe, and is used to control the extension and retraction of the piston rod of the tilting cylinder 7. The first throttle valve 17 is connected in series on the air supply line to the pneumatic motor 2, and is used to precisely adjust the speed of the pneumatic motor 2, thereby controlling the slag pushing speed. The second throttle valve 18 is connected in series on the air supply line to the tilting cylinder 7, and is used to buffer the cylinder action and reduce the impact on the molten tin surface.

[0029] The dual-pressure valve 10, the first limit valve 11, and the second limit valve 12 together constitute a safety interlock unit. The first limit valve 11 and the second limit valve 12 are also mechanical two-position three-way valves, fixed to the lead screw guide pair 3 by a mounting base, and respectively located at the mechanical travel limit positions outside the first rolling valve 13 and the second rolling valve 14. The output ports of the first limit valve 11 and the second limit valve 12 are connected to the two input ports of the dual-pressure valve 10 via air pipes. The output port of the dual-pressure valve 10 is simultaneously connected to the control ports (or pilot signal interfaces) of the first pneumatic control valve 15 and the second pneumatic control valve 16 via air pipes.

[0030] The working principle of this utility model is as follows: In the initial state, the hollow push rod 5 is located at the starting end, the second rolling valve 14 is pressed down by the slider 4, and the graphite plate 8 is submerged below the surface of the molten tin.

[0031] Promoting Slag Accumulation: Upon system startup, compressed air enters the pneumatic motor 2 via the first pneumatic control valve 15 (initially in its initial position) and the first throttle valve 17, driving it to rotate forward. The pneumatic motor 2 drives the lead screw to rotate, propelling the slider 4, hollow push rod 5, and graphite plate 8 together to move smoothly into the tin bath. The graphite plate 8, submerged below the liquid surface, pushes the floating tin slag towards the pre-set accumulation area.

[0032] Terminal flipping: When slider 4 moves to the end of its stroke, it presses down the first rolling valve 13. The pneumatic signal generated by the first rolling valve 13 is divided into two paths: one path acts on the control port of the first pneumatic control valve 15, causing it to switch direction, cutting off the forward rotation air path of the pneumatic motor 2 and connecting the reverse rotation air path, so that the pneumatic motor 2 stops rotating forward; the other path acts on the control port of the second pneumatic control valve 16, causing it to switch direction, and compressed air enters the rodless chamber of the flipping cylinder 7 through the second throttle valve 18. The piston rod extends and pulls the flipping bracket 6 through the pull rod 9, causing the graphite plate 8 to flip upward about 60 degrees away from the molten tin surface and accumulating and shaping the tin dross.

[0033] Retraction: At this time, the reverse air circuit of pneumatic motor 2 has been connected, and it begins to reverse at the set speed, driving the entire slag pushing mechanism to retract through the transmission mechanism.

[0034] Reset at the starting end: When slider 4 retracts to the starting end, it presses down the second rolling valve 14. The pneumatic signal generated by the second rolling valve 14 is also divided into two paths: one path resets the first pneumatic control valve 15, cutting off the reverse air path of the pneumatic motor 2 and stopping it; the other path resets the second pneumatic control valve 16, and compressed air enters the rod chamber of the tilting cylinder 7, the piston rod retracts, and the graphite plate 8 resets below the molten tin surface, preparing for the next working cycle.

[0035] Safety Protection: If any malfunction causes slider 4 to become uncontrolled and exceed the first rolling valve 13 or the second rolling valve 14, it will trigger the outer first limit valve 11 or the second limit valve 12. This will cause one input port of the dual-pressure valve 10 to lose pressure, and its output signal will disappear. This signal change will force the first pneumatic control valve 15 and the second pneumatic control valve 16 to reset, immediately cutting off all power air supply, forcibly stopping the equipment, and effectively preventing mechanical damage.

[0036] This utility model has the following beneficial effects: 1. Fully automated operation is achieved: Through the triggering of pneumatic position sensors and the linkage of pneumatic control valves, a complete cycle of 'push-tumble stacking-return-reset' is realized, completely replacing manual labor and significantly reducing labor intensity.

[0037] 2. Smooth operation and guaranteed glass quality: The speed of the pneumatic motor and cylinder is precisely controlled by the throttle valve and the exhaust valve, so that the slag pushing and flipping actions are gentle, minimizing the fluctuation of the molten tin surface.

[0038] 3. High reliability and good safety: The innovative pneumatic safety interlock circuit (based on a dual-pressure valve) can force a shutdown when the pneumatic control valve fails, preventing equipment damage. It is especially suitable for industrial environments that operate continuously for 24 hours.

[0039] 4. Reduce solder dross at the source: Automated operation reduces the number of times the observation window needs to be opened, thus reducing the risk of solder oxidation.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. For example, the transmission mechanism may also employ gears and racks, synchronous belts, or other mechanisms capable of linear reciprocating motion; the slag pushing component may also be made of other high-temperature resistant materials compatible with molten tin.

[0041] Furthermore, any equivalent structural or procedural transformations made using the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this utility model.

Claims

1. An automatic slag-pushing device for a float glass tin bath, characterized in that, include: The frame, pneumatic motor, transmission mechanism, push rod assembly, slag-collecting tilting mechanism, and pneumatic control system; The pneumatic motor and the transmission mechanism are respectively mounted and fixed on the frame, and the power output shaft of the pneumatic motor is connected to the transmission mechanism. The push rod assembly is connected to the transmission mechanism and performs synchronous reciprocating linear motion under the drive of the transmission mechanism; The slag-collecting and tilting mechanism includes a slag-pushing component, a tilting bracket, and a tilting cylinder; the cylinder body of the tilting cylinder is mounted on the push rod assembly, and its piston rod is hinged to the tilting bracket via a pull rod; the slag-pushing component is mounted on the tilting bracket. The pneumatic control system is connected to the pneumatic motor and the tilting cylinder via an air pipe, enabling the slag pushing component to automatically perform pushing, tilting, retraction and resetting actions according to a preset stroke.

2. The apparatus according to claim 1, characterized in that, The transmission mechanism includes a lead screw guide pair and a slider; the lead screw guide pair is fixedly installed on the top of the frame, and its lead screw is rotatably supported on the frame; the slider is fitted onto the lead screw and engages with the lead screw thread; the output shaft of the pneumatic motor is drivenly connected to one end of the lead screw.

3. The apparatus according to claim 2, characterized in that, The push rod assembly is a hollow push rod, the tail of which is fixedly connected to the slider, and the pull rod passes through the internal cavity of the hollow push rod.

4. The apparatus according to claim 1, characterized in that, The slag pushing component is a graphite plate, which is fixed to the end of the flipping bracket by bolts.

5. The apparatus according to claim 1, characterized in that, The bottom of the frame is equipped with height-adjustable feet and shock-absorbing pads.

6. The apparatus according to claim 2, characterized in that, The pneumatic control system includes a pneumatic logic control element connected via an air pipe. The pneumatic logic control element includes a first pneumatic position sensor, a second pneumatic position sensor, and a reversing valve group. The pneumatic logic control element is connected to an air source, the pneumatic motor, and the tilting cylinder via an air pipe.

7. The apparatus according to claim 6, characterized in that, The first pneumatic position sensor and the second pneumatic position sensor are mechanical rolling valves, which are respectively mounted on the guide rail of the lead screw guide pair via mounting bases, and correspond to the end and start positions of the slag pushing stroke, respectively.

8. The apparatus according to claim 6, characterized in that, The reversing valve assembly includes a first two-position five-way pneumatic control valve and a second two-position five-way pneumatic control valve; the first two-position five-way pneumatic control valve is connected to the air inlet of the pneumatic motor through an air pipe; the second two-position five-way pneumatic control valve is connected to the two air ports of the tilting cylinder through an air pipe.

9. The apparatus according to claim 7, characterized in that, A first throttle valve is connected in series on the air supply line of the pneumatic motor; a second throttle valve is connected in series on the air supply line of the tilting cylinder.

10. The apparatus according to claim 8, characterized in that, The pneumatic control system also includes a safety interlock unit, which includes a dual-pressure valve, a first limit valve, and a second limit valve. The first and second limit valves are mechanical limit valves, which are fixed to the lead screw guide pair by the mounting base and located at the extreme positions outside the first and second pneumatic position sensors; the output ports of the first and second limit valves are connected to the input port of the dual-pressure valve through air pipes; the output port of the dual-pressure valve is connected to the first two-position five-way pneumatic control valve and the second two-position five-way pneumatic control valve through air pipes respectively.

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