Intelligent opening and closing door device for holding furnace of low pressure casting machine
The intelligent identification and automatic control liquid filling gate device solves the problem of manual operation of the liquid filling gate in low-pressure casting machines, realizes a safe and efficient automatic liquid filling process, is suitable for production in the dark, and reduces costs.
Patent Information
- Application Number
- CN202521470098.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-07-03
AI Technical Summary
The liquid filling door of the low-pressure furnace used in existing low-pressure casting machines requires manual operation, which results in low safety, low efficiency, and is unsuitable for production in the dark.
It employs an intelligent identification mechanism, an insulated furnace door mechanism, a spinning mechanism, and a door opening mechanism, combined with an electric contact pressure gauge, a cooling fan, an intelligent identifier, and a PLC electrical system to achieve automated control and safe liquid addition.
It automates the liquid addition process, improves safety and efficiency, is suitable for lights-out production, reduces production costs, and increases capacity.
Smart Images
Figure CN224945225U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of casting, specifically to an intelligent opening and closing door device for the holding furnace of a low-pressure casting machine. Background Technology
[0002] Currently, the liquid filling door of the low-pressure furnace used in low-pressure casting machines still adopts the screw spinning side-opening type (with photo), which still requires manual operation. This is not only unsafe and inefficient, but also has high labor costs and is not suitable for the needs of dark production. Utility Model Content
[0003] To address the above problems, this application provides an intelligent opening and closing door device for the holding furnace of a low-pressure casting machine, characterized by including an intelligent identification mechanism, a heat-insulating furnace door mechanism, a spinning mechanism, an opening mechanism, and a control mechanism.
[0004] The intelligent identification mechanism includes an electrical contact pressure gauge installed on the heating tube cover on one side of the low-pressure furnace, a liquid inlet located on the upper front slope of the low-pressure furnace shell, and an intelligent identification device frame installed on the slope of the furnace shell on the side of the liquid inlet (see attached diagram). Figure 1 The intelligent identifier is equipped with a cooling fan on the frame, the intelligent identifier is located at the front end of the cooling fan, and a cooling shroud is provided on the outer shell of the intelligent identifier. The electrical contact pressure gauge, the cooling fan, the intelligent identifier and the control mechanism are connected by a connecting wire.
[0005] The low-pressure furnace door is also equipped with a heat-insulating furnace door mechanism, a spinning mechanism, and a door opening mechanism on its inclined surface.
[0006] The insulated furnace door mechanism includes an insulated furnace door installed on the liquid inlet of the low-pressure furnace. Two pairs of perforated two-piece door hinge plates are installed on the upper side of the insulated furnace door. A furnace door connecting shaft is installed in the holes of the hinge plates. Door hinge brackets corresponding to the two pairs of perforated two-piece door hinge plates are installed on the inclined surface of the furnace door above the liquid inlet. Elongated holes are provided in the door hinge brackets. A high-temperature resistant vacuum box with a mirror surface, slightly smaller than the liquid inlet, is installed inside the insulated furnace door. Sealing grooves of the same shape as the liquid inlet are installed around the high-temperature vacuum box. High-temperature resistant sealing strips are installed in the sealing grooves. The outer edge of the furnace door is located outside the sealing grooves. Four top door springs are installed on the upper and lower inclined surfaces outside the liquid inlet below the outer edge of the furnace door (see attached diagram). Figure 1 Two perforated fisheye connecting plates are installed at the center of the furnace door, and furnace door connecting shafts are installed in the holes of the connecting plates (see appendix). Figure 3 A spinning mechanism is also installed around the liquid filling port, and an opening mechanism is installed on the insulated furnace door mechanism.
[0007] The spinning mechanism includes six spinning cylinders installed on the furnace shell around the liquid inlet for sealing the insulated furnace door. After the furnace door is closed with the two door hinge supports as fulcrums, the outer edge of the furnace door presses against four top door springs. The spinning cylinder claws can rotate 90 degrees to be positioned on the insulated furnace door (see appendix). Figure 1 When the cylinder rod of the spinning cylinder retracts, the cylinder claw presses down the insulated furnace door, compressing the four top door springs and sealing the high-temperature resistant sealing strip under the door with the liquid filling port; when the cylinder rod extends, the top door spring rebounds and smoothly pushes the furnace door open, positioning the door hinge connecting shaft above the elongated hole, and disengaging the high-temperature resistant sealing strip of the insulated furnace door from the liquid filling port, thus preventing friction between the high-temperature resistant sealing strip and the liquid filling port.
[0008] The door opening mechanism includes a perforated door opening and closing cylinder bracket (see attached) installed in the front side of the furnace mouth plate on the upper side of the low-pressure furnace door. Figure 3 The cylinder support hole is equipped with a cylinder connecting shaft, and the door opening and closing cylinder is equipped with an opening and closing cylinder in the door opening and closing cylinder support. The tail end of the door opening and closing cylinder is connected to the door opening and closing cylinder support by a connecting shaft. The top of the cylinder rod of the door opening and closing cylinder is equipped with a fisheye connector, which is located in a perforated fisheye connecting plate and connected by a connecting shaft.
[0009] The control mechanism includes a control cabinet and a hydraulic station located on one side of the low-pressure furnace. A liquid level detector is installed on the low-pressure furnace, and a contact switch is installed above the elongated hole. The control cabinet contains a power supply for an intelligent identifier and a PLC. The connecting wires of the pressure gauge, intelligent identifier, liquid level detector, and contact switch are connected to the power supply for the intelligent identifier and the PLC, controlling the intelligent opening and closing of the holding furnace door of the low-pressure casting machine. This allows the PLC to control the liquid filling package to run to the front of the holding furnace after receiving the instruction that the holding furnace needs liquid filling. When the pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the liquid filling package automatically fills the holding furnace to the required liquid level through the filling port.
[0010] The cooling fan can cool the smart identifier in high-temperature environments by directing airflow through the cooling shroud, ensuring the long-term operation of the smart identifier;
[0011] The high-temperature resistant sealing strip uses ceramic packing.
[0012] The spinning cylinder and the hydraulic station are connected by a spinning cylinder oil circuit pipe, and the door opening and closing cylinder and the hydraulic station are connected by a door opening and closing cylinder oil circuit pipe.
[0013] In the heat-insulating furnace door of the intelligent opening and closing device for the heat-insulating furnace of the low-pressure casting machine, a high-temperature resistant vacuum box with a mirror surface slightly smaller than the liquid filling port is used to replace the existing ceramic plate, thereby improving the heat insulation effect of the heat-insulating furnace door and reducing energy consumption.
[0014] The system employs a pressure gauge to confirm no pressure in the insulation furnace, a level detector to indicate a low level, and an intelligent identifier to confirm that the liquid filling bag has reached the designated position. The PLC then instructs the spinning cylinder to extend, causing the spinning cylinder claws to rotate 90 degrees away from the insulation furnace door, thus disengaging the insulation furnace door from the liquid filling port; ensuring operational safety.
[0015] Four top door springs, located on the outer slope of the liquid inlet on the outside of the furnace door, push the furnace door open when the cylinder rod extends. This positions the door hinge link above the elongated hole. After the high-temperature sealing strip of the insulated furnace door 4 separates from the liquid inlet, the PLC commands the opening and closing cylinder to retract, opening the insulated furnace door. This prevents friction between the high-temperature sealing strip and the liquid inlet, avoiding damage to the sealing strip, preventing air leakage, extending the sealing service life, and ensuring the stable quality of low-pressure casting products in the insulated furnace.
[0016] The furnace door is sealed by six spinning cylinders located on the outer furnace shell of the liquid inlet. This satisfies the pressure required for sealing the furnace door, replaces screw spinning, avoids air leakage from the sealing strip, and achieves the automation requirements for sealing the furnace door.
[0017] The system employs an electrical contact pressure gauge mounted on the heating tube casing on one side of the low-pressure furnace and an intelligent identifier mounted on a frame equipped with a cooling fan and cooling shroud. When the electrical contact pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the system automatically adds liquid to the holding furnace. This is suitable for production in the dark, reducing casting production costs and laying the foundation for increased production capacity. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of an intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to this application.
[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the left-side view.
[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the structure after the intelligent door opens. Detailed Implementation
[0021] The specific embodiments of this application will be further described below with reference to the accompanying drawings.
[0022] The diagram includes: 1. Low-pressure insulation furnace; 2. Electrical contact pressure gauge; 3. Intelligent identifier frame; 4. Insulated furnace door; 5. Spinning cylinder; 6. Door hinge bracket; 7. Door hinge plate; 8. Door opening cylinder bracket; 9. Door opening and closing cylinder; 10. Fish-eye connecting plate; 11. Top door spring; 12. Spinning cylinder claw; 13. Spinning cylinder oil passage pipe; 14. Door opening and closing cylinder oil passage pipe; 15. Long hole; 16. Liquid filling port; 17. High-temperature resistant vacuum box; 18. Sealing groove; 19. Furnace door outer edge; etc.
[0023] As shown in the figure, this application is an intelligent opening and closing door device for the holding furnace of a low-pressure casting machine, including an intelligent identification mechanism, a heat-insulating furnace door mechanism, a spinning mechanism, a door opening mechanism, and a control mechanism;
[0024] The intelligent identification mechanism includes an electric contact pressure gauge 2 mounted on a heating tube cover on one side of the low-pressure furnace, a liquid inlet 16 located on the upper front inclined surface of the low-pressure furnace shell, an intelligent identifier frame 3 located on the front side of the inclined surface of the furnace shell on the side of the liquid inlet, a cooling fan mounted on the intelligent identifier frame, an intelligent identifier located at the front end of the cooling fan, a cooling fan cover mounted on the outer shell of the intelligent identifier, and connecting wires provided between the electric contact pressure gauge, the cooling fan, the intelligent identifier, and the control mechanism.
[0025] The heat-insulating furnace door mechanism, the spinning mechanism, and the opening mechanism are installed on the inclined surface of the furnace door of the low-pressure furnace;
[0026] The insulated furnace door mechanism includes an insulated furnace door 4 mounted on a low-pressure furnace filling port 16; two pairs of perforated two-piece door hinge plates 7 welded to the upper side of the insulated furnace door; a furnace door connecting shaft disposed in the holes of the door hinge plates; door hinge brackets 6 corresponding to the two pairs of perforated two-piece door hinge plates welded to the inclined surface of the furnace door above the filling port 16; an elongated hole 15 disposed in the door hinge bracket 6; a high-temperature resistant vacuum box 17 with a mirrored outer shell slightly smaller than the inner opening size of the filling port 16 disposed in the insulated furnace door; a sealing groove 18 with the same shape as the filling port disposed around the high-temperature resistant vacuum box, with a width greater than the thickness of the filling port material; a high-temperature resistant sealing strip disposed in the sealing groove; an outer edge 19 of the furnace door disposed around the outer side of the sealing groove 18; and four top door springs 11 disposed on the upper and lower inclined surfaces of the filling port below the outer edge of the furnace door (see appendix). Figure 1 The two perforated fisheye connecting plates 10 are positioned at the center of the furnace door, and the furnace door connecting shaft is positioned within the holes of the connecting plates (see attached). Figure 3 The spinning mechanism is located around the liquid inlet, and the door opening mechanism is located on the insulated furnace door.
[0027] The spinning mechanism includes six spinning cylinders 5 for sealing the insulated furnace door 4, which are mounted on the furnace shell around the liquid inlet 16. After the furnace door is closed with the two door hinge brackets 6 as fulcrums, the outer edge of the furnace door presses against four top door springs 11. After the spinning cylinder rod extends, the cylinder claw 12 rotates 90 degrees and rests on the insulated furnace door 4 (see appendix). Figure 1When the cylinder rod of the spinning cylinder retracts, the cylinder claw 12 presses down the insulated furnace door 4, compressing the four top door springs 11, and pressing the high-temperature resistant sealing strip under the door tightly against the liquid filling port 16; when the cylinder rod extends, the top door spring 11 rebounds and smoothly pushes the furnace door open, so that the door hinge connecting shaft is above the elongated hole 15, and the high-temperature resistant sealing strip of the insulated furnace door 4 is separated from the liquid filling port, avoiding friction between the high-temperature resistant sealing strip and the liquid filling port;
[0028] The door opening mechanism, including the perforated door opening and closing cylinder bracket 8, is located at the center of the front side of the furnace mouth plate on the upper side of the low-pressure furnace door (see attached). Figure 3 The hydraulic cylinder connecting shaft is set in the hydraulic cylinder bracket hole, and the door opening and closing hydraulic cylinder 9 is set in the door opening and closing hydraulic cylinder bracket 8; the tail end of the door opening and closing hydraulic cylinder 9 is connected to the door opening and closing hydraulic cylinder bracket 8 by the hydraulic cylinder connecting shaft, the fisheye connector is set at the top of the hydraulic cylinder rod of the door opening and closing hydraulic cylinder 9, and the fisheye of the fisheye connector is set in the perforated fisheye connecting plate 10 and connected by the connecting shaft;
[0029] The control mechanism includes a control cabinet and a hydraulic station located on one side of the low-pressure furnace. A liquid level detector is located next to the riser pipe, and a contact switch is located above the elongated hole 15. The power supply and PLC electrical components of the intelligent identifier are located in the control cabinet. The connecting wires of the electric contact pressure gauge, intelligent identifier, liquid level detector, and contact switch are connected to the power supply of the intelligent identifier and the PLC electrical components to control the intelligent opening and closing of the holding furnace of the low-pressure casting machine. This allows the PLC to control the liquid filling package to run to the front of the holding furnace after receiving the instruction that the holding furnace needs to be filled with liquid. When the electric contact pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the liquid filling package automatically fills the liquid filling port of the holding furnace. When the liquid level detector detects the required height, it sends a stop instruction to the liquid filling package. When the intelligent identifier detects that the liquid filling package has left the liquid filling port, the PLC instructs the opening and closing cylinder rod to extend, closing the heat insulation furnace door. After the rotating cylinder rotates, the cylinder claw automatically presses and seals the heat insulation furnace door. The operation of the heat insulation furnace door does not require manual intervention.
[0030] The cooling fan can cool the smart identifier in high-temperature environments by directing airflow through the cooling shroud, ensuring the long-term operation of the smart identifier;
[0031] The high-temperature resistant sealing strip uses ceramic packing.
[0032] The spinning cylinder and the hydraulic station are connected by the spinning cylinder oil circuit pipe 13, and the door opening and closing cylinder 9 and the hydraulic station are connected by the door opening and closing cylinder oil circuit pipe 14.
[0033] In the heat-insulating furnace door of the intelligent opening and closing device for the heat-insulating furnace of the low-pressure casting machine, a high-temperature resistant vacuum box with a mirror surface slightly smaller than the liquid filling port is used to replace the existing ceramic plate, thereby improving the heat insulation effect of the heat-insulating furnace door and reducing energy consumption.
[0034] When the pressure gauge confirms that there is no pressure in the insulation furnace and the intelligent identifier confirms that the liquid filling bag is in the correct position, the PLC then commands the spinning cylinder rod to extend, the spinning cylinder claw 12 to rotate 90 degrees, and the spinning cylinder claw to leave the insulation furnace door, ensuring safe operation.
[0035] Four top door springs 11, located on the outer slope of the liquid inlet on the outside of the furnace door, rebound when the spinning cylinder rod extends, smoothly opening the furnace door. The spinning cylinder claw 12 rotates 90 degrees, and the door hinge connecting shaft rises above the elongated hole 15, touching the contact switch and sending a command to the PLC. The high-temperature resistant sealing strip of the insulated furnace door 4 smoothly disengages from the liquid inlet, causing the opening and closing cylinder to retract and opening the insulated furnace door. This avoids friction between the high-temperature resistant sealing strip and the liquid inlet, preventing damage to the sealing strip, avoiding air leakage, extending the sealing service life, and ensuring the stable quality of low-pressure casting products in the heat-insulating furnace.
[0036] Six spinning cylinders installed on the outer furnace shell of the liquid inlet 16 are used to press and seal the heat-insulating furnace door, which meets the pressure required for pressing and sealing the heat-insulating furnace door, replaces screw spinning, avoids air leakage from the sealing strip, and achieves the requirement of automation of pressing and sealing the heat-insulating furnace door;
[0037] The system employs an electrical contact pressure gauge 2 mounted on the heating tube casing on one side of the low-pressure furnace and an intelligent identifier mounted on a frame equipped with a cooling fan and cooling shroud. When the electrical contact pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the system automatically adds liquid to the holding furnace. This is suitable for production in the dark, reducing casting production costs and laying the foundation for increased production capacity.
[0038] The above description is only for illustrating the implementation of this application and is not intended to limit this application. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An intelligent opening and closing door device for an insulation furnace of a low pressure casting machine, characterized in that, Includes intelligent identification mechanism, insulated furnace door mechanism, spinning mechanism, door opening mechanism, and control mechanism; The intelligent identification mechanism includes an electrical contact pressure gauge installed on the heating tube cover on one side of the low-pressure furnace, a liquid inlet installed in the upper inclined surface of the front side of the low-pressure furnace shell, an intelligent identifier frame installed on the inclined surface of the furnace shell on one side of the liquid inlet, a cooling fan installed on the intelligent identifier frame, an intelligent identifier installed at the front end of the cooling fan, a cooling shroud installed on the outer shell of the intelligent identifier, and a connecting wire installed between the electrical contact pressure gauge, the cooling fan, the intelligent identifier and the control mechanism. The low-pressure furnace door is also equipped with a heat-insulating furnace door mechanism, a spinning mechanism, and a door opening mechanism on its inclined surface. The insulated furnace door mechanism includes an insulated furnace door installed on the liquid inlet of the low-pressure furnace; two pairs of perforated two-piece door hinge plates are installed on the upper side of the insulated furnace door, with furnace door connecting shafts installed in the holes of the door hinge plates; door hinge brackets corresponding to the two pairs of perforated two-piece door hinge plates are installed on the inclined surface of the furnace door above the liquid inlet, with elongated holes in the door hinge brackets; a high-temperature resistant vacuum box with a mirror surface, slightly smaller than the liquid inlet, is installed in the insulated furnace door; a sealing groove of the same shape as the liquid inlet is installed around the high-temperature resistant vacuum box, with a high-temperature resistant sealing strip installed in the sealing groove; an outer edge of the furnace door is installed outside the sealing groove; four top door springs are installed on the upper and lower inclined surfaces of the liquid inlet below the outer edge of the furnace door; two perforated fisheye connecting plates are installed at the center of the upper part of the furnace door, with furnace door connecting shafts installed in the holes of the connecting plates; a spinning mechanism is also installed around the liquid inlet; and an opening mechanism is installed on the insulated furnace door mechanism. The spinning mechanism includes six spinning cylinders installed on the furnace shell around the liquid inlet for sealing the insulated furnace door. After the furnace door is closed with the two door hinge supports as fulcrums, the outer edge of the furnace door presses against four top door springs. The spinning cylinder claws can rotate 90 degrees to be placed on the insulated furnace door. When the cylinder rod of the spinning cylinder retracts, the cylinder claws press down the insulated furnace door, compressing the four top door springs and pressing the high-temperature resistant sealing strip under the door tightly against the liquid inlet. When the cylinder rod extends, the top door springs rebound and smoothly open the furnace door, so that the door hinge connecting shaft is above the elongated hole, and the high-temperature resistant sealing strip of the insulated furnace door is disengaged from the liquid inlet, avoiding friction between the high-temperature resistant sealing strip and the liquid inlet. The door opening mechanism includes a perforated door opening and closing cylinder bracket installed on the front side of the furnace mouth plate on the upper side of the low-pressure furnace door. A cylinder connecting shaft is installed in the hole of the cylinder bracket, and a door opening and closing cylinder is installed in the door opening and closing cylinder bracket. The tail end of the door opening and closing cylinder is connected to the door opening and closing cylinder bracket by the connecting shaft. A fisheye connector is installed at the top of the cylinder rod of the door opening and closing cylinder. The fisheye connector is installed in the perforated fisheye connecting plate and is connected by the connecting shaft. The control mechanism includes a control cabinet and a hydraulic station located on one side of the low-pressure furnace. A liquid level detector is installed on the low-pressure furnace, and a contact switch is installed above the elongated hole. The control cabinet contains a power supply for an intelligent identifier and a PLC. The connecting wires of the pressure gauge, intelligent identifier, liquid level detector, and contact switch are connected to the power supply for the intelligent identifier and the PLC, controlling the intelligent opening and closing of the holding furnace door of the low-pressure casting machine. This allows the PLC to control the liquid filling package to run to the front of the holding furnace after receiving the instruction that the holding furnace needs liquid filling. When the pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the liquid filling package automatically fills the holding furnace to the required liquid level through the filling port. The cooling fan can cool the smart identifier in high-temperature environments by directing airflow through the cooling shroud, ensuring the long-term operation of the smart identifier; The high-temperature resistant sealing strip uses ceramic packing. The spinning cylinder and the hydraulic station are connected by a spinning cylinder oil circuit pipe, and the door opening and closing cylinder and the hydraulic station are connected by a door opening and closing cylinder oil circuit pipe.
2. The intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to claim 1, characterized in that it provides heat insulation. Inside the furnace door, a high-temperature resistant vacuum box with a mirrored surface, slightly smaller than the liquid filling port, is used to replace the existing ceramic plate, thereby improving the heat insulation effect of the insulated furnace door and reducing energy consumption.
3. The intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to claim 1, characterized in that, The system employs an electric contact pressure gauge to confirm that the insulation furnace has no pressure, a liquid level detector to display a low liquid level, and an intelligent identifier to confirm that the liquid filling package has reached the designated position. At this point, the PLC commands the spinning cylinder to extend, and the spinning cylinder claws rotate 90 degrees to leave the insulation furnace door, allowing the insulation furnace door to detach from the liquid filling port; this ensures safe operation.
4. The intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to claim 1, characterized in that, Four top door springs are installed on the outer slope of the liquid inlet outside the furnace door. When the cylinder rod is extended, the top door springs (11) rebound to open the furnace door, so that the door hinge link shaft is above the long hole. After the high temperature resistant sealing strip of the heat insulation furnace door (4) is separated from the liquid inlet, the PLC commands the opening and closing cylinder to retract and open the heat insulation furnace door. This avoids friction between the high temperature resistant sealing strip and the liquid inlet, which could damage the sealing strip and prevent air leakage. It also extends the service life of the seal and ensures the quality stability of the low pressure casting products in the heat insulation furnace.
5. The intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to claim 1, characterized in that, The insulated furnace door is sealed by six spinning cylinders located on the outer furnace shell of the liquid inlet. This satisfies the pressure required for sealing the insulated furnace door, replaces screw spinning, avoids air leakage from the sealing strip, and achieves the requirement of automation for sealing the insulated furnace door.
6. The intelligent opening and closing door device for the holding furnace of a low-pressure casting machine according to claim 1, characterized in that, The system employs an electrical contact pressure gauge mounted on the heating tube casing on one side of the low-pressure furnace and an intelligent identifier mounted on a frame equipped with a cooling fan and cooling shroud. When the electrical contact pressure gauge confirms that the holding furnace has no pressure and the intelligent identifier confirms that the liquid filling package is in the correct position, the liquid filling package automatically adds liquid to the holding furnace. This system is suitable for production in the dark, reducing casting production costs and increasing production capacity.