Limiting triggering-based real-time alarm device for mold falling of chain belt of pig casting machine

Abstract

The utility model discloses a pig-casting machine chain belt die falling real-time alarm device based on limit triggering, which comprises a bottom plate, a bottom cylinder, a limit rod and a stand column are respectively arranged on the bottom plate in a triangular form, a rotatable rotating shaft sleeve is arranged at the top end of the bottom cylinder, a trigger rod is arranged on the side wall of the rotating shaft, and the trigger rod is connected with the stand column. The trigger rod is located on the side, away from the stand column, of the limiting rod, a connecting plate is arranged on the lower wall of the trigger rod, a switch mounting plate is arranged on the bottom plate and located between the limiting rod and the stand column, a travel switch abutting against the connecting plate is arranged on the switch mounting plate, and the travel switch is electrically connected with an alarm. A reset spring with one end connected with the trigger rod is arranged on the surface of the stand column. The triggering rod is installed on the lower middle portion of the pig casting machine chain belt, the triggering rod can rotate along with the rotating shaft sleeve through cooperation of the rotating shaft sleeve and the triggering rod, and when a chain belt mold falls off, the triggering rod makes contact with the limiting rod, so that the alarm is triggered to conduct prompting, the real-time alarming function is achieved, and personnel can conveniently conduct troubleshooting.

Description

Technical Field

[0001] This utility model belongs to the field of safety monitoring technology for cast iron machine production, and in particular relates to a real-time alarm device for cast iron machine chain belt mold drop based on limit triggering. Background Technology

[0002] During the continuous operation of the casting machine's chain conveyor, the fixing bolts of the casting mold are prone to loosening or breaking due to long-term wear, causing one side of the casting mold to detach. If not detected and stopped in time, the detached mold will become stuck in critical parts such as the spraying bucket, head and tail pulley devices, and groove nozzle as the chain conveyor moves along, leading to overload damage to the motor or reducer, causing unplanned downtime and significant economic losses. In addition, sudden shutdown may cause molten iron to overflow from the casting groove, seriously threatening production safety and increasing the risk of equipment damage. Summary of the Invention

[0003] The purpose of this utility model is to address the problems existing in the prior art by providing a real-time alarm device for cast iron machine chain conveyor mold detachment based on limit triggering. It addresses the issue of single-sided mold detachment caused by loose or broken fixing bolts in existing technologies. Through a combination of mechanical limit and electrical interlocking, it solves the following key problems: 1. Delayed fault detection: Traditional manual inspections struggle to detect mold detachment in a timely manner. After detachment, the mold can easily become stuck in critical parts such as the spray gun and head / tail wheel devices as the chain conveyor runs, leading to equipment overload damage and unplanned shutdowns; 2. Uncontrollable chain reaction risks: Sudden shutdowns can cause molten iron to overflow from the casting trough, posing serious safety hazards and secondary economic losses. By monitoring the status of the chain conveyor mold in real time, an audible and visual alarm is triggered at the moment of detachment, and an emergency stop mechanism is activated, achieving fully automated control of the "detection-alarm-stop" process. This fundamentally blocks the path of fault propagation, ensuring production safety and continuity.

[0004] To achieve the above objectives, the utility model employs the following technical solution: a real-time alarm device for casting iron machine chain belt mold drop based on limit triggering, comprising a base plate, on which a bottom cylinder, a limit rod, and a column are respectively arranged in a triangular pattern. A rotatable rotating bushing is provided at the top of the bottom cylinder, and a trigger rod is provided on the side wall of the rotating bushing. The trigger rod is located on the side of the limit rod away from the column, and a connecting plate is provided on the lower wall of the trigger rod. A switch mounting plate is provided on the base plate between the limit rod and the column, and a limit switch is provided on the switch mounting plate that abuts against the connecting plate. The limit switch is electrically connected to an alarm, and a return spring with one end connected to the trigger rod is provided on the surface of the column.

[0005] In the above technical solution, the trigger rod is installed in the lower part of the cast iron machine chain. Through the cooperation of the rotating bushing and the trigger rod, the trigger rod can rotate with the rotating bushing. When the chain mold falls, the trigger rod contacts the limit rod, thereby triggering the alarm to provide a prompt, realizing a real-time alarm function. This facilitates personnel in troubleshooting, effectively improves the speed of chain fault handling, avoids secondary faults, and thus improves on-site production efficiency. The design of the reset spring ensures that the trigger rod can automatically reset after triggering the alarm, avoiding device failure due to the trigger rod jamming, and improving the reusability and reliability of the device.

[0006] Optionally, the trigger rod includes a horizontal bar welded to the outside of the rotating bushing at one end, and an L-shaped rod welded vertically to the other end of the horizontal bar. The other end of the L-shaped rod extends to the mold drop point of the casting machine chain, which can directly sense the action of the mold dropping, ensuring the sensitivity of the trigger rod.

[0007] Optionally, the return spring is provided with collars at both ends, and the two collars are respectively fitted onto the surface of the vertical part of the column and the L-rod. The collar design at both ends of the return spring ensures that the connection between the return spring and the column and the L-rod is more secure, and avoids device failure due to spring loosening or falling off.

[0008] Optionally, the alarm is an audible and visual alarm.

[0009] Optionally, the sliding end of the limit switch is rotatably mounted with an abutment ring that abuts against the connecting plate. The arc-shaped design of the abutment ring allows the connecting plate to trigger the limit switch more sensitively.

[0010] Optionally, the rotating bushing includes an inner shaft vertically welded to the top of the bottom cylinder, and a rotatable outer cylinder fitted on the surface of the inner shaft. The rotating bushing consists of an inner shaft and an outer cylinder. The outer cylinder is rotatable, ensuring that the trigger rod can rotate flexibly to respond to the action of the mold falling. The matching design of the inner shaft and the outer cylinder enhances the overall structural stability of the rotating bushing and avoids the trigger rod from failing due to the loosening of the rotating bushing.

[0011] Optionally, the rotating bushing includes an inner shaft that is vertically and rotatably inserted into the bottom cylinder and extends out of the top of the bottom cylinder. The inner shaft is a threaded rod, and an outer shaft cylinder is threadedly installed on the surface of the inner shaft. The inner shaft is rotatable, ensuring that the trigger rod can rotate flexibly to respond to the action of the mold falling. The inner shaft is threadedly connected to the outer shaft cylinder, so the height of the outer shaft cylinder can be adjusted, thereby adjusting the height of the trigger rod, to adapt to casting iron machines of different heights.

[0012] Optionally, the diameter of the inner shaft is smaller than the diameter of the bottom cylinder, ensuring that the rotating bushing can be stably installed on the bottom cylinder and preventing the rotating bushing from falling off due to the excessive diameter of the inner shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The trigger rod is installed in the lower part of the cast iron machine chain. Through the cooperation of the rotating bushing and the trigger rod, the trigger rod can rotate with the rotating bushing. When the chain mold falls, the trigger rod contacts the limit rod, thereby triggering the alarm to provide a prompt, realizing the real-time alarm function, solving the problem of fault detection lag, and thus improving on-site production efficiency; 2. At the same time, timely detection of problems also facilitates personnel to troubleshoot faults, effectively improving the speed of chain fault handling, having a good risk control effect, and avoiding secondary faults; 3. The design of the reset spring ensures that the trigger rod can automatically reset after triggering the alarm, avoiding device failure due to trigger rod jamming, and improving the reusability and reliability of the device. Attached Figure Description

[0014] Figure 1 A three-dimensional schematic diagram of a real-time alarm device for casting iron machine chain belt mold drop based on limit triggering is provided for an embodiment of this utility model.

[0015] Figure 2 This is a two-dimensional perspective schematic diagram of the real-time alarm device for casting iron machine chain belt mold drop based on limit triggering according to this utility model;

[0016] Figure 3 This is a schematic diagram of the limit switch structure of this utility model.

[0017] In the diagram: 1. Base plate; 2. Base cylinder; 3. Rotating bushing; 4. Trigger rod; 41. Crossbar; 42. L-bar; 5. Connecting plate; 6. Limit rod; 7. Switch mounting plate; 8. Limit switch; 9. Column; 10. Return spring; 11. Alarm. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figure 1As shown in Figure 3, the specific solution of the embodiment is as follows: A real-time alarm device for casting iron machine chain belt mold drop based on limit triggering includes a base plate 1. The base plate 1 is provided with a bottom cylinder 2, a limit rod 6 and a column 9 in a triangular arrangement. The top of the bottom cylinder 2 is provided with a rotatable rotating bushing 3. The side wall of the rotating bushing is provided with a trigger rod 4. The trigger rod 4 is located on the side of the limit rod 6 away from the column 9. The lower wall of the trigger rod 4 is provided with a connecting plate 5. A switch mounting plate 7 is provided on the base plate 1 and located between the limit rod 6 and the column 9. The switch mounting plate 7 is provided with a limit switch 8 that abuts against the connecting plate 5. The limit switch 8 is electrically connected to an alarm 11. The surface of the column 9 is provided with a reset spring 10 with one end connected to the trigger rod 4.

[0021] In the above technical solution, the trigger rod 4 is installed in the lower part of the cast iron machine chain. Through the cooperation of the rotating bushing 3 and the trigger rod 4, the trigger rod 4 can rotate with the rotating bushing 3. When the chain mold falls, the trigger rod 4 contacts the limit rod 6, thereby triggering the alarm 11 to provide a prompt, realizing the real-time alarm function, solving the problem of fault detection lag, and thus improving on-site production efficiency. At the same time, timely detection of problems also facilitates personnel to troubleshoot faults, effectively improving the speed of chain fault handling, providing good risk control, and avoiding secondary faults. The design of the reset spring 10 ensures that the trigger rod 4 can automatically reset after triggering the alarm, avoiding device failure due to the trigger rod 4 jamming, and improving the reusability and reliability of the device.

[0022] In this embodiment, the trigger rod 4 includes a horizontal bar 41 with one end horizontally welded to the outside of the rotating bushing 3, and an L-bar 42 vertically welded to the other end of the horizontal bar 41. The other end of the L-bar 42 extends to the mold drop point of the casting machine chain, which can directly sense the action of the mold dropping, ensuring the sensitivity of the trigger rod 4.

[0023] In practice, both the crossbar 41 and the L-bar 42 are made of SUS304 stainless steel hollow tubes with an outer diameter of Φ20mm and a wall thickness of 3mm. They are made by argon arc welding and have the characteristics of being lightweight, resistant to high temperature (≤600℃), and resistant to release agent corrosion. They are installed horizontally directly below the chain belt and are assembled with the base through the gap between the rotating shaft and the base (fitting tolerance H7 / g6) to ensure that the rotating shaft rotates synchronously during displacement.

[0024] In this embodiment, the return spring 10 is provided with collars at both ends. The two collars are respectively sleeved on the surface of the vertical part of the column 9 and the L rod 42. The collar design at both ends of the return spring 10 ensures that the connection of the return spring 10 on the column 9 and the L rod 42 is more secure, and avoids device failure due to spring loosening or falling off.

[0025] Among them, the return spring 10 has a wire diameter of Φ3mm and a spring stiffness of 5N / mm, providing ≥90% return accuracy and supporting continuous triggering; when the demolding mold collides with the trigger rod 4 and causes its displacement to be ≥10mm, the trigger rod 4 rotates and drives the connecting plate 5 to separate from the limit switch 8 → the contact closes → the audible and visual alarm 11 is activated and sends an emergency stop signal to the control box → the chain motor is powered off and braked (response time ≤2 seconds).

[0026] In this embodiment, the alarm 11 is an audible and visual alarm 11 (AC220V / 10W), and the limit switch 8 is an Omron D4V-8100Z. Its contacts are connected in series with the audible and visual alarm 11 and connected to a 24V DC power supply circuit. The head of the limit switch 8 touches the connecting plate 5 on the trigger rod 4 to form a closed circuit.

[0027] In this embodiment, the sliding end of the limit switch 8 is rotatably mounted with an abutment ring that abuts against the connecting plate 5. The arc-shaped design of the abutment ring allows the connecting plate 5 to trigger the limit switch 8 more sensitively.

[0028] In this embodiment, the rotating bushing 3 includes an inner shaft vertically welded to the top of the bottom cylinder 2, and a rotatable outer cylinder is fitted on the surface of the inner shaft. The rotating bushing 3 is composed of an inner shaft and an outer cylinder. The outer cylinder is rotatable, ensuring that the trigger rod 4 can rotate flexibly and respond to the action of the mold falling. The matching design of the inner shaft and the outer cylinder enhances the overall structural stability of the rotating bushing 3 and avoids the trigger rod 4 from failing due to the loosening of the rotating bushing 3.

[0029] Preferably, the rotating bushing 3 includes an inner shaft rod that is vertically and rotatably inserted into the bottom cylinder and extends out of the top of the bottom cylinder. The inner shaft rod is a threaded rod, and an outer shaft cylinder is threadedly installed on the surface of the inner shaft rod. The inner shaft rod can rotate to ensure that the trigger rod can rotate flexibly and respond to the action of the mold falling. The inner shaft rod is threadedly connected to the outer shaft cylinder, so the height of the outer shaft cylinder can be adjusted, thereby adjusting the height of the trigger rod 5, to adapt to casting iron machines of different heights.

[0030] In this embodiment, the diameter of the inner shaft is smaller than the diameter of the bottom cylinder 2, ensuring that the rotating bushing 3 can be stably installed on the bottom cylinder 2 and preventing the rotating bushing 3 from falling off due to the excessive diameter of the inner shaft.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows: The trigger rod 4 is installed in the lower part of the cast iron machine chain. Through the cooperation of the rotating bushing 3 and the trigger rod 4, the trigger rod 4 can rotate with the rotating bushing 3. When the chain mold falls, the trigger rod 4 contacts the limit rod 6, thereby triggering the alarm 11 to provide a prompt, realizing the real-time alarm function, facilitating personnel to troubleshoot faults, effectively improving the speed of chain fault handling, avoiding secondary faults, and thus improving on-site production efficiency. The design of the reset spring 10 ensures that the trigger rod 4 can automatically reset after triggering the alarm, avoiding device failure due to the trigger rod 4 being stuck, and improving the reusability and reliability of the device.

[0032] In this embodiment, the power supply for the limit switch 8 is 24V DC, while the power supply for the audible and visual alarm circuit is 220V AC.

[0033] In practical use, two sets of this device are equipped on the iron casting machine. When either set of mold drop alarm devices is triggered, the corresponding alarm indicator light illuminates and the electric bell rings. Operators can quickly identify which section of the chain belt is faulty and stop the machine promptly for inspection and repair. This prevents molds from falling and jamming the spray gun, head and tail pulleys, and groove nozzles, or even damaging the motor and reducer, causing downtime or incalculable losses. Sudden stops can also cause molten iron to overflow from the casting trough. Actual testing shows that the average response time of this system is 1.8 seconds, a 98% improvement in efficiency compared to manual inspection. After multiple consecutive triggers, the return spring 10 has a return error of less than 10%, and the limit switch contacts show no oxidation failure. This reduces fault response time to within 30 seconds, decreases downtime by approximately 60%, and increases production efficiency by 15%.

[0034] The working principle of the above embodiment is as follows: When the chain mold falls, it hits the trigger rod 4, causing the trigger rod 4 to rotate. This causes the trigger rod 4 to drive the connecting plate 5 to rotate around the bottom cylinder 2 in a direction away from the column 9, thereby disengaging the connecting plate 5 from the limit switch 8. This causes the limit switch 8 to close, triggering the alarm 11 to provide a warning and enabling a real-time alarm function. After the chain mold is reinstalled, the trigger rod 4 rotates under the tension of the return spring 10, causing the connecting plate 5 to re-engage with the limit switch 8, thus opening the limit switch 8 and stopping the alarm 11.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cast iron machine chain belt stripping mold real-time alarm device based on limit triggering, characterized in that, The device includes a base plate, on which a base cylinder, a limiting rod, and a column are arranged in a triangular pattern. A rotatable rotating bushing is provided at the top of the base cylinder. A trigger rod is provided on the side wall of the rotating bushing. The trigger rod is located on the side of the limiting rod away from the column. A connecting plate is provided on the lower wall of the trigger rod. A switch mounting plate is provided on the base plate between the limiting rod and the column. A limit switch is provided on the switch mounting plate that abuts against the connecting plate. The limit switch is electrically connected to an alarm. A return spring is provided on the surface of the column, with one end connected to the trigger rod.

2. The chain belt off-mold real-time alarm device based on limit triggering for a cast iron machine according to claim 1, characterized in that: The trigger rod includes a horizontal bar welded to the outside of the rotating bushing at one end, and an L-shaped rod welded vertically to the other end of the horizontal bar. The other end of the L-shaped rod extends to the mold drop point of the cast iron machine chain.

3. The chain belt off-mold real-time alarm device based on limit triggering of the cast iron machine according to claim 2, characterized in that: The return spring has collars at both ends, and the two collars are respectively sleeved on the surface of the vertical part of the column and the L rod.

4. The chain belt off-mold real-time alarm device based on limit triggering for a cast iron machine according to claim 1, characterized in that: The alarm is an audible and visual alarm.

5. The chain belt off-mold real-time alarm device based on limit triggering for a cast iron machine according to claim 1, characterized in that: The sliding end of the limit switch is rotatably fitted with an abutment ring that abuts against the connecting plate.

6. The chain belt off-mold real-time alarm device based on limit triggering for a cast iron machine according to claim 1, characterized in that: The rotating bushing includes an inner shaft vertically welded to the top of the bottom cylinder, and a rotatable outer cylinder is fitted onto the surface of the inner shaft.

7. The chain belt off-mold real-time alarm device based on limit triggering for a cast iron machine according to claim 1, characterized in that: The rotating bushing includes an inner shaft that is vertically inserted into the bottom cylinder and extends out of the top of the bottom cylinder. The inner shaft is a threaded shaft, and an outer shaft cylinder is threaded onto the surface of the inner shaft.

8. The chain belt off-mold real-time alarm device based on limit triggering of the cast iron machine according to claim 7, characterized in that: The diameter of the inner shaft is smaller than the diameter of the bottom cylinder.

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