Molten aluminum leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingot

Abstract

The utility model relates to the technical field of molten aluminum leakage detection and alarm devices, and particularly discloses a molten aluminum leakage detection and alarm device for semi-continuous casting of an aluminum alloy round ingot, which is arranged on one side of a forming cavity of a crystallizer and comprises a piston sleeve, a first piston rod, an air cylinder assembly, an inductor and a control unit, the piston sleeve is fixedly arranged on one side of a forming cavity of the crystallizer, the first piston rod is arranged in the piston sleeve in a penetrating mode, the end, close to the forming cavity, of the first piston rod extends out of the piston sleeve to be connected with a roller, and the other end of the first piston rod extends out of the piston sleeve to be fixedly connected with the air cylinder assembly. The limiting plate is connected with the inner end face of the piston sleeve through an elastic piece, the inductor is arranged on the outer wall of the piston sleeve in a penetrating mode, and the induction end of the inductor is located on the outer side of the limiting plate. Due to the design of the detection alarm device, the leakage condition of the molten aluminum can be detected in time so as to remind a worker to find the leakage condition in time, and safety accidents are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum liquid leakage detection and alarm devices, and particularly relates to an aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots. Background Art

[0002] When producing aluminum alloy round ingots, since liquid aluminum needs to be cooled with water to achieve the purpose of rapid heat dissipation when forming solid ingots, however, there have been many explosion incidents at home and abroad. The reasons for the explosions include various factors such as crystallizer aging, dummy bar head deformation, dislocation, and uneven temperature of the diverter plate adapter plate. During the operation of the crystallizer, there will be a phenomenon of aluminum leakage. The leaked aluminum liquid directly flows into the cooling water in the casting well. When the high-temperature liquid aluminum water meets the cooling water in the casting well, physical and chemical reactions occur. The hydrogen generated by the chemical reaction causes a violent hydrogen explosion. Each explosion will cause major casualties and huge economic losses, and the consequences are very serious.

[0003] When producing aluminum alloy round ingots, generally dozens of billets are poured at a time, and in some cases, more than a hundred. Currently, the main detection and prevention methods are to rely on operators to visually observe the casting mold plate and the upper end of the crystallizer during casting, and judge whether there is aluminum leakage by whether there are signs of rapid flow of the aluminum liquid level in the diverter plate of the casting mold plate. If aluminum leakage is found, a special plug is stuffed into the diversion tube inlet at the upper end of the crystallizer from the upper part to block the aluminum liquid from entering the crystallizer and stop the casting of this crystallizer. One is blocked for each discovery. If multiple leaks occur, the casting is stopped.

[0004] However, this method of relying on manual observation of the flow change of the aluminum liquid surface to judge whether there is leakage is really a helpless move. This prevention method has the following several defects: First, there is water spraying in the crystallizer to cool the ingot. When the cooling water contacts the surface of the high-temperature round ingot, a large amount of water vapor is formed, making it impossible for the naked eye to observe the aluminum leakage situation of the crystallizer in a timely manner. Moreover, during casting, multiple round ingots are cast simultaneously, and the operator can only see whether the outer layer of the crystallizer leaks, and the leakage situation of the inner layer of the crystallizer cannot be seen.

[0005] Second, the casting time for one casting batch is about 1 - 2 hours. Dozens or even more than a hundred are cast each time, and each round ingot corresponds to a diverter plate. Relying on manual observation of so many diverter plates for a long time is particularly likely to cause the operator to miss the observation due to fatigue, resulting in the failure to detect aluminum leakage in a timely manner and causing an explosion.

[0006] Third, an oxide film will form on the surface of the high-temperature aluminum liquid, covering the surface of the aluminum liquid. The change in the liquid level flow becomes less obvious, which also increases the difficulty of manual visual observation by the naked eye, easily leading to misjudgment and failure to detect aluminum leakage, resulting in a huge potential safety hazard. Therefore, there is an urgent need to design an aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots to solve the above problems. Content of the Utility Model

[0007] The purpose of the present utility model is to provide an aluminum liquid leakage detection and alarm device for semi - continuous casting of aluminum alloy round ingots, which solves the problems of potential safety hazards and losses caused by the inability to detect aluminum liquid leakage in time as mentioned above.

[0008] To solve the above - mentioned technical problems, the present utility model provides an aluminum liquid leakage detection and alarm device for semi - continuous casting of aluminum alloy round ingots. The detection and alarm device is arranged on one side of the forming cavity of the mold. The detection and alarm device includes a piston sleeve, a first piston rod, a cylinder assembly, a sensor and a control unit. The piston sleeve is fixedly arranged on one side of the forming cavity of the mold. The first piston rod passes through the piston sleeve, and one end close to the forming cavity extends out of the piston sleeve and is connected with a roller, and the other end extends out of the piston sleeve and is fixedly connected with the cylinder assembly.

[0009] A limiting plate is sleeved on the first piston rod. The limiting plate is slidably connected with the piston sleeve. The limiting plate and the inner end face of the piston sleeve are connected by an elastic member. The sensor passes through the outer wall of the piston sleeve, and its sensing end is located outside the limiting plate. The sensor is connected to the control unit through a signal. The control unit is connected with an alarm device. When aluminum liquid leaks, the roller moves towards the forming cavity of the mold, and the limiting plate moves accordingly to trigger the contact of the sensor.

[0010] Furthermore, a cooling water mechanism is arranged in the mold, and the cooling water mechanism is located on one side of the upper part of the forming cavity.

[0011] Furthermore, a diversion channel is arranged in the mold. A graphite ring is arranged at the junction of the diversion channel and the forming cavity, and the graphite ring is located above the cooling water mechanism.

[0012] Furthermore, a casting cylinder is arranged below the mold. An ingot head is fixedly arranged on the casting cylinder. The ingot head is located below the forming cavity. An arc surface that can cooperate with the roller is arranged outside the ingot head.

[0013] Furthermore, the cylinder assembly includes a cylinder body, a second piston rod, a piston and a cylinder block. The cylinder body is fixedly arranged at the end of the first piston rod far from the mold. One end of the second piston rod penetrates into the cylinder body and is connected with the piston, and the other end is connected with the cylinder block. The bottom of the cylinder block is fixedly arranged on a support platform.

[0014] Furthermore, the elastic member is a compression spring.

[0015] Furthermore, there are two rollers, and the two rollers are arranged on both sides of the first piston rod through a rotating shaft.

[0016] The beneficial effects of the utility model are as follows: the design of the detection alarm device in the utility model can make the roller compress the first piston rod and the limit plate to the side away from the molding cavity through the elastic member when there is no leakage of aluminum liquid, so that the roller can abut against the arc surface on the side wall of the ingot starter or the outer side of the aluminum alloy ingot. When aluminum liquid leaks, leakage will occur in the molding cavity, resulting in the ingot being unable to be molded. Then, the roller moves into the molding cavity after losing the abutting force, and a certain forward space is left between the piston and the cylinder body. The limit plate and the first piston rod move toward the molding cavity accordingly, so that the limit plate can trigger the contact of the sensor, and the sensor sends a signal to the control unit, and the control unit sends a signal to the alarm device to remind the human to find it in time, so that the casting can be stopped immediately, so as to avoid the occurrence of safety accidents and prevent casualties.

[0017] The design of the cylinder assembly enables the piston to move in the cylinder body through the cylinder body, and also enables the cylinder body to move when the first piston rod moves left and right, so that the piston slides in the cylinder body, solving the problem that the existing piston rod cannot continue to move when the cylinder is extended to the maximum stroke or the minimum stroke, thereby improving the mobility of the first piston rod;

[0018] The design of the compression spring and the movable space between the piston and the cylinder body can enable the limit plate and the first piston rod to move forward to the maximum stroke when the cylinder assembly drives the piston to push the first piston rod and the roller, and the roller extends into the molding cavity. Then, through the design of the compression spring and the movable space between the piston and the cylinder body, the first piston rod is contracted toward the cylinder assembly to abut the curved surface of the side wall of the ingot head and the outer wall of the aluminum alloy ingot, so as to improve the collection accuracy of the roller. At the same time, it can also prevent the problem that the limit plate and the sensor always come into contact when they are not in the alarm state and issue an erroneous alarm message. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a cross-sectional view of an aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots of the utility model;

[0021] In the figure: 1 - Detection and alarm device, 2 - Mould, 3 - Graphite ring, 4 - Casting cylinder, 5 - Starting head, 11 - Piston sleeve, 12 - First piston rod, 13 - Cylinder assembly, 14 - Inductor, 16 - Roller, 17 - Limit plate, 18 - Elastic member, 21 - Moulding cavity, 23 - Cooling water mechanism, 24 - Diversion channel, 131 - Cylinder body, 132 - Second piston rod, 133 - Piston, 134 - Cylinder block. Detailed implementation mode

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without making creative efforts belong to the scope of protection of the utility model.

[0023] In a specific embodiment of the utility model, as Figure 1 shown, a molten aluminum leakage detection and alarm device for semi - continuous casting of aluminum alloy round ingots is specifically disclosed. The detection and alarm device 1 is arranged on one side of the moulding cavity 21 of the mould 2. The detection and alarm device 1 includes a piston sleeve 11, a first piston rod 12, a cylinder assembly 13, an inductor 14 and a control unit. The piston sleeve 11 is fixedly arranged on one side of the moulding cavity 21 of the mould 2. The first piston rod 12 is arranged in the piston sleeve 11, and the end close to the moulding cavity 21 extends out of the piston sleeve 11 and is connected with a roller 16, and the other end extends out of the piston sleeve 11 and is fixedly connected with the cylinder assembly 13. There are two rollers 16, and the two rollers 16 are arranged on both sides of the first piston rod 12 through a rotating shaft, so that the two rollers 16 can roll.

[0024] A limit plate 17 is sleeved on the first piston rod 12. The limit plate 17 is slidably connected with the piston sleeve 11. The limit plate 17 and the inner end face of the piston sleeve 11 are connected by an elastic member 18. In this embodiment, the elastic member 18 is preferably a compression spring, and can also be other elastic members 18 with elasticity. The inductor 14 is arranged on the outer wall of the piston sleeve 11, and its sensing end is located outside the limit plate 17. The inductor 14 is connected to the control unit through a signal, and the control unit is connected with an alarm device. When molten aluminum leaks, the roller 16 moves into the moulding cavity 21 of the mould 2, and the limit plate 17 moves accordingly to trigger the contact of the inductor 14.

[0025] A cooling water mechanism 23 is arranged in the mould 2, and the cooling water mechanism 23 is located on the upper side of the moulding cavity 21.

[0026] A diversion channel 24 is arranged in the mould 2. A graphite ring 3 is arranged at the junction of the diversion channel 24 and the moulding cavity 21, and the graphite ring 3 is located above the cooling water mechanism 23 and is fixedly arranged on the inner wall of the mould 2.

[0027] A casting cylinder 4 is provided below the crystallizer 2 , on which a starter head 5 is fixedly provided. The starter head 5 is located below the molding cavity 21 , and an arc surface that can cooperate with the roller 16 is provided on the outer side of the starter head 5 .

[0028] The cylinder assembly 13 includes a cylinder body 131, a second piston rod 132, a piston 133 and a cylinder body 134. The cylinder body 131 is fixedly arranged at the end of the first piston rod 12 away from the crystallizer 2. One end of the second piston rod 132 penetrates into the cylinder body 131 and is connected with the piston 133, and the other end is connected with the cylinder body 134. The bottom of the cylinder body 134 is fixedly arranged on a support platform. A solenoid valve can be arranged on the cylinder assembly 13 so that the control unit can control the extension and retraction of the second piston rod 132 of the cylinder assembly 13. The design of the cylinder assembly 13 enables the piston 133 to drive the piston 133 to move in the cylinder body 131 through the cylinder body 134, and also enables the first piston rod 12 to move left and right, thereby driving the cylinder body 131 to move, so that the piston 133 slides in the cylinder body 131, thereby solving the problem that the existing piston rod cannot continue to move when the cylinder is extended and retracted to the maximum stroke or the minimum stroke, so as to improve the mobility of the first piston rod 12.

[0029] The design of the compression spring and the movable space between the piston 133 and the cylinder body 134 can enable the limit plate 17 and the first piston rod 12 to be able to move forward to the maximum stroke when the cylinder assembly 13 drives the piston 133 to push the first piston rod 12 and the roller 16. Then, through the design of the compression spring and the movable space between the piston 133 and the cylinder body 134, the first piston rod 12 can be contracted toward the cylinder assembly 13 to abut against the curved surface of the side wall of the ingot head 5 and the outer wall of the aluminum alloy ingot, so as to improve the collection accuracy of the roller 16. At the same time, it can also prevent the limit plate 17 and the sensor 14 from always contacting each other when they are not in the alarm state and issuing an erroneous alarm message.

[0030] The design of the detection alarm device 1 can enable the roller 16 to compress the first piston rod 12 and the limit plate 17 to the side away from the molding cavity 21 through the elastic member 18 when there is no aluminum liquid leakage, so that the roller 16 can abut against the arc surface on the side wall of the ingot starter 5 or the outer side of the aluminum alloy ingot. When aluminum liquid leaks, leakage will occur in the molding cavity 21, resulting in the ingot being unable to be molded. The roller 16 moves into the molding cavity 21 after losing the abutment force. In addition, a certain forward space is left between the piston 133 and the cylinder body 134, and the limit plate 17 and the first piston rod 12 move toward the molding cavity 21 accordingly, so that the limit plate 17 can trigger the contact of the sensor 14, and the sensor 14 sends a signal to the control unit, and the control unit sends a signal to the alarm device to remind humans to discover it in time and stop casting immediately to avoid the occurrence of safety accidents and prevent casualties.

[0031] The working process of the utility model:

[0032] Installation method of the detection and alarm device 1:

[0033] A support platform is placed on the ground far from the forming cavity 21 of the mold 2. The piston sleeve 11 is fixedly installed on one side of the forming cavity 21 of the mold 2 through a fixed platform. The cylinder block 134 of the cylinder assembly 13 is installed on the support platform on one side of the fixed platform, and the second piston rod 132, the cylinder body 131, and the piston 133 are installed on the side of the cylinder block 134 close to the forming cavity 21 of the mold 2. The height of the support platform is higher than that of the fixed platform. Then, the limiting plate 17 is sleeved on one end of the first piston rod 12. One end of the elastic member 18 is fixed on one side of the limiting plate 17, and the other end is sleeved on the end wall of the piston sleeve 11, and the other end of the elastic member 18 is fixed inside the end wall of the piston sleeve 11, so that the elastic member 18 is located between the limiting plate 17 and the end wall of the piston sleeve 11. One end of the first piston rod 12 with the limiting plate 17 installed is inserted into the piston sleeve 11, and the end wall of the piston sleeve 11 is fixed to the inner wall of the end of the piston sleeve 11. One end of the first piston rod 12 located outside the end wall of the piston sleeve 11 is fixed to the cylinder body 131. Two rollers 16 are connected to the other end of the first piston rod 12 through a rotating shaft;

[0034] Working process of debugging the detection and alarm device 1 when not casting:

[0035] The cylinder block 134 of the cylinder assembly 13 controls the second piston rod 132 and the cylinder body 131 to move towards the forming cavity 21 of the mold 2. The first piston rod 12 and the two rollers 16 also move accordingly. At this time, the dummy bar head 5 is in the non-casting state, and there is an arc surface on the side wall of the dummy bar head 5. At this time, the arc surface of the dummy bar head 5 and the two rollers 16 are in the same plane. When the second piston rod 132 extends to the maximum stroke, and at this time, there is a certain gap between the piston 133 and the end of the first piston rod 12, and the cylinder block 134 of the cylinder assembly 13 is in a fixed state. The two rollers 16 and the first piston rod 12 move towards the cylinder assembly 13 under the abutment of the arc surface of the dummy bar head 5, and the limiting plate 17 moves accordingly, and the elastic member 18 is compressed, so that the compression spring is in a compressed state;

[0036] Working process of the detection and alarm device 1 during casting:

[0037] The casting cylinder 4 drives the ingot starter 5 to move downward, and the aluminum liquid in the guide channel 24 flows downward. When it flows to the graphite ring 3 in the crystallizer 2, the aluminum liquid casting is formed, and as the ingot starter 5 moves downward, the cooling water mechanism 23 sprays and cools the formed aluminum alloy ingot. At this time, the ingot starter 5 is downward, and the two rollers 16 roll from the arc surface to the upper end. At this time, it is in a normal state. The two rollers 16 continue to roll with the outer wall of the aluminum alloy ingot. When the crystallizer 2 is used for a long time, it will be too late to cool the aluminum liquid into shape. At this time, the temperature of the aluminum liquid is higher than the temperature at the graphite ring 3, resulting in the aluminum liquid flowing from the guide channel 24 into the molding cavity 21 cannot be fixed and formed, so leakage will occur. At this time, the two rolling rollers After the wheel 16 contacts the unformed leaking liquid and loses the contact force of the outer wall of the aluminum alloy ingot, the elastic member 18 will pop open, so that the two rollers 16 and the limit plate 17 move into the forming cavity 21, and the limit plate 17 will trigger the sensor 14 on the outer wall of the piston sleeve 11, and the sensor 14 sends a signal to the control unit. After receiving the signal, the control unit immediately sends it to the alarm device to prompt the operator to come through the crystallizer 2 position display on the mold plate on site and the strong sound and light signal to remind the operator to start blocking the diversion channel 24 of the crystallizer 2 corresponding to the leakage position, so that the crystallizer 2 stops casting, thereby improving the safety of the casting equipment, avoiding the risk of explosion caused by the aluminum liquid entering the cooling water mechanism and mixing with the cooling water, and effectively improving the safety of the personnel;

[0038] After the casting is completed, the cylinder assembly 13 drives the first piston rod 12 to return to its original position, and the two rollers 16 move away from the crystallizer 2 to stop the detection.

[0039] The control unit is pre-set in the control unit the ratio of the number of crystallizers 2 that give simultaneous alarms, and the control unit automatically stops the casting of the entire casting system.

[0040] If the alarm devices corresponding to all crystallizers 2 or the vast majority of crystallizers 2 sound an alarm, the control unit starts to stop the casting program, the cylinder assembly 13 retracts, and at the same time starts the emergency plan for the casting cylinder 4 to rise. The solid round ingot rises and presses against the outlet of the crystallizer 2 to prevent the aluminum liquid from flowing out, avoiding an instantaneous large-scale aluminum liquid leakage and causing an explosion.

[0041] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots, characterized in that: The detection alarm device (1) is arranged on one side of the molding cavity (21) of the crystallizer (2), and comprises a piston sleeve (11), a first piston rod (12), a cylinder assembly (13), a sensor (14) and a control unit. The piston sleeve (11) is fixedly arranged on one side of the molding cavity (21) of the crystallizer (2), the first piston rod (12) is inserted into the piston sleeve (11), and one end close to the molding cavity (21) extends out of the piston sleeve (11) and is connected to a roller (16), and the other end extends out of the piston sleeve (11) and is fixedly connected to the cylinder assembly (13). A limit plate (17) is sleeved on the first piston rod (12), the limit plate (17) is slidably connected to the piston sleeve (11), the limit plate (17) is connected to the inner end surface of the piston sleeve (11) via an elastic member (18), the sensor (14) is penetrated on the outer wall of the piston sleeve (11), and its sensing end is located on the outer side of the limit plate (17), the sensor (14) is connected to the control unit via a signal, and the control unit is connected to, when aluminum liquid leaks, the roller (16) moves into the molding cavity (21) of the crystallizer (2), and the limit plate (17) moves accordingly to trigger the contact of the sensor (14).

2. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy ingots according to claim 1 is characterized in that: A cooling water mechanism (23) is provided in the crystallizer (2), and the cooling water mechanism (23) is located on one side of the upper part of the molding cavity (21).

3. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots according to claim 2 is characterized in that: A guide channel (24) is provided in the crystallizer (2), a graphite ring (3) is provided at the intersection of the guide channel (24) and the molding cavity (21), and the graphite ring (3) is located above the cooling water mechanism (23).

4. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots according to claim 3 is characterized in that: A casting cylinder (4) is provided below the crystallizer (2), a starter head (5) is fixedly provided on the casting cylinder (4), the starter head (5) is located below the molding cavity (21), and an arc surface that can cooperate with the roller (16) is provided on the outer side of the starter head (5).

5. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots according to claim 1 is characterized in that: The cylinder assembly (13) comprises a cylinder body (131), a second piston rod (132), a piston (133) and a cylinder body (134); the cylinder body (131) is fixedly arranged at the end of the first piston rod (12) away from the crystallizer (2); one end of the second piston rod (132) penetrates into the cylinder body (131) and is connected to the piston (133); the other end is connected to the cylinder body (134); and the bottom of the cylinder body (134) is fixedly arranged on a support platform.

6. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots according to claim 1 is characterized in that: The elastic member (18) is a compression spring.

7. The aluminum liquid leakage detection and alarm device for semi-continuous casting of aluminum alloy round ingots according to claim 1 is characterized in that: There are two rollers (16), and the two rollers (16) are arranged on both sides of the first piston rod (12) via a rotating shaft.

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