Positioning device and method for molten iron tank car of double-track train

Abstract

The invention relates to the field of molten iron tank car positioning, in particular to a double-track train molten iron tank car positioning device which comprises a train erected on two train tracks, a molten iron tank is arranged on the train, and two sets of laser correlation photoelectric switches and a diffuse reflection switch located between the two sets of laser correlation photoelectric switches are arranged on one side wall of each train track. Laser correlation photoelectric switches are arranged on one side walls of the train tracks, correlation photoelectric switch reflecting plates corresponding to the laser correlation photoelectric switches are arranged on the other side walls of the train tracks, signal warning lamps are arranged on the two side walls of the train tracks respectively and used for warning trains on the two train tracks, and a discharging structure is further arranged on the train tracks and used for discharging the trains on the two train tracks. The feeding device is used for feeding the molten iron tanks on the two lines. Through cooperation of the laser correlation photoelectric switch, the diffuse reflection switch and the correlation photoelectric switch reflecting plate, accurate positioning of the hot-metal bottle of the double-line train is achieved, positioning of the discharging opening and the hot-metal bottle is accurate, and accidents caused by splashing waste and train way blocking are avoided.

Description

Technical Field

[0001] The invention relates to the field of molten iron tank car positioning, and in particular to a molten iron tank car positioning device and method for a double-track train. Background Art

[0002] In order to increase production, steel mills can add scrap steel to the molten iron tank, and then add molten iron to the molten iron tank. The total amount of molten iron will increase, and the molten iron can be poured into the converter. After the converter makes steel, the steel output can be increased. Adding scrap steel to the molten iron tank requires the molten iron tank to be accurately positioned at the discharge port. Steel mills generally have double-track railway tracks. If a train transports molten iron tanks, the double-track molten iron tanks need to be accurately positioned to ensure that scrap steel can be added to both tracks.

[0003] The existing double-track train molten iron tanks are usually located by using cameras and image processing technology to identify and locate the molten iron tank car. During the identification process, it is easy to cause inaccurate identification, resulting in the inability to accurately align the discharge port and the molten iron tank, which is easy to spill and cause waste. At the same time, it will also block the railway track, cause safety hazards, and cause accidents. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a double-track train molten iron tank car positioning device and method, which can achieve accurate unloading by accurately positioning the molten iron tank cars of the two lines at the unloading ports, thereby avoiding waste caused by spillage and accidents caused by blocking the railway tracks.

[0005] According to one aspect of the present invention, a double-track train molten iron tank car positioning device is provided, comprising a train set up on two train tracks, a molten iron tank is provided on the train, two groups of laser beam photoelectric switches and a diffuse reflection switch located between the two groups of laser beam photoelectric switches are provided on one side wall of the train track, a reflective plate of a beam photoelectric switch corresponding to the laser beam photoelectric switch is provided on the other side wall of the train track, signal warning lights are provided on both side walls of the train track respectively, for warning the trains on the two train tracks, and a material discharge structure is also provided on the train track, for respectively feeding the molten iron tanks on the two lines. When the molten iron tank car slowly drives to the discharge port area, and the molten iron tank body completely blocks the two pairs of laser beam photoelectric switches, the tank mouth is just below the discharge port, and when the diffuse reflection switch is activated, it indicates that the train molten iron tank is accurately aligned online, and the program control line discharge port allows the addition of scrap steel; when the diffuse reflection switch is not activated, it indicates that the train molten iron tank is accurately aligned online, and the line discharge port allows the addition of scrap steel, thus realizing the positioning function of the double-track molten iron tank.

[0006] As a further technical solution, the material discharge structure includes a pair of mounting plates fixed between the two side walls of the train track, a connecting funnel that can move linearly up and down is provided between the pair of mounting plates, and a funnel-shaped material discharge bin that can move linearly left and right is also provided on the pair of mounting plates, and a switch assembly that blocks the material discharge opening is provided on the outer side of the bottom end of the material discharge bin, which can be used to realize the opening and closing of the bottom opening of the material discharge bin. When the train molten iron tank is precisely aligned on the line, the mouth of the line molten iron tank is automatically opened, and the connecting funnel corresponding to the line moves down until its bottom end extends into the mouth of the line molten iron tank, and then the material discharge bin is driven to move to the top of the connecting funnel corresponding to the line, and the bottom opening of the material discharge bin is opened, and the scrap steel can enter the line molten iron tank through the connecting funnel.

[0007] As a further technical solution, a lifting cylinder is fixed between the pair of mounting plates, an L-shaped mounting plate is fixed to the output shaft of the lifting cylinder, and the connecting funnel is fixed to the L-shaped mounting plate. When the lifting cylinder is started, the extension and retraction of the lifting cylinder can drive the connecting funnel to move up and down through the L-shaped mounting plate.

[0008] As a further technical solution, the train track side wall is fixed with a limit track, and the L-shaped mounting plate is fixed with a limit slider slidably connected with the limit track. When the L-shaped mounting plate drives the connecting funnel to move up and down, under the guidance of the limit slider and the limit slide rail, the movement of the L-shaped mounting plate is more stable.

[0009] As a further technical solution, the opposite surfaces of a pair of the mounting plates are provided with threaded rods rotatably through bearings, and the outer sides of the two threaded rods are threadedly connected with movable blocks, and the pair of movable blocks are respectively fixed to the front and rear sides of the lower bin, and the mounting plates are also fixed with limit rods, which penetrate the corresponding movable blocks. When the threaded rods rotate, the movable blocks can drive the lower bin to perform left and right linear movements under the guidance of the limit rods.

[0010] As a further technical solution, a driving motor is fixed on one side of the mounting plate, the output shaft of the driving motor is fixed to the end of the corresponding threaded rod, and the other ends of the two threaded rods are connected through a belt transmission member. When the driving motor drives the corresponding threaded rod to rotate, the two threaded rods can rotate under the transmission effect of the belt transmission member.

[0011] As a further technical solution, the switch assembly includes a pair of arc-shaped baffles hinged to the outer side of the bottom end of the connecting funnel, and a flip cylinder is hinged on both side walls of the connecting funnel. The flip cylinder is extended and retracted to drive the pair of arc-shaped baffles to rotate relative to each other or rotate in opposite directions. When the pair of arc-shaped baffles rotate relative to each other until they fit together, the bottom opening of the connecting funnel can be closed, and when the pair of arc-shaped baffles rotate in opposite directions, they no longer block the bottom opening of the connecting funnel, and the bottom opening of the connecting funnel can be opened.

[0012] As a further technical solution, a buffer structure is also provided in the connecting funnel, and the buffer structure includes a mounting frame fixed in the connecting funnel, a rotating motor is fixed in the mounting frame, the output shaft of the rotating motor is fixed with a rotating bin, a driving cylinder is fixed in the rotating bin, the output shaft of the driving cylinder penetrates and extends to the bottom of the rotating bin, and the output shaft of the driving cylinder is fixed with three iron ropes, and the ends of the three iron ropes are fixed with iron balls. When the bottom end of the connecting funnel extends into the mouth of the molten iron tank, the driving cylinder is pushed out to move the three iron ropes downward, reducing the distance between the iron ball and the liquid level in the molten iron tank, and the rotating motor drives the iron rope to drive the iron ball to rotate. When the scrap steel falls from the connecting funnel into the molten iron tank, the rotating iron ball can play a buffering role, so that when the scrap steel falls into the molten iron tank, the possibility of molten iron splashing is reduced.

[0013] As a further technical solution, a limiting sleeve is fixed to the inner bottom wall of the rotating bin, and the limiting sleeve is arranged outside the output shaft of the driving cylinder, which can be used to ensure the stability of the cylinder when it is extended and retracted.

[0014] According to one aspect of the present invention, a method for positioning a double-track train molten iron tank car is provided, comprising the following steps:

[0015] When the molten iron tanker slowly drives to the discharge port area and the molten iron tank blocks the two pairs of laser photoelectric switches, the tank mouth is just below the discharge port;

[0016] If the diffuse reflection switch is activated, it means that the train iron ladle is aligned with line 2, and the program controls the feeding port of line 2 to allow the addition of scrap steel;

[0017] The mouth of the molten iron tank of line 2 opens automatically, and the corresponding connecting funnel moves down until its bottom extends into the mouth of the molten iron tank of line 2, and then the lower bin is driven to move to the top of the corresponding connecting funnel, and the bottom opening of the lower bin opens, so that the scrap steel can enter the molten iron tank of line 2 through the connecting funnel;

[0018] When the scrap steel falls in, the three iron ropes move downward to reduce the distance between the iron ball and the liquid level in the molten iron tank. The falling scrap steel is buffered by the rotating iron ball until the feeding is completed.

[0019] If the diffuse reflection switch does not work, it means that the train molten iron tank is accurately positioned on line 1, and the lower feeding port of line 1 allows the addition of scrap steel, and the feeding action can be carried out in the same way.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention realizes the precise positioning of the double-track train molten iron tank by utilizing the cooperation of the laser beam photoelectric switch, the diffuse reflection switch and the beam photoelectric switch reflection plate. The control method is effective and reliable, and the discharge port and the molten iron tank are precisely positioned, avoiding spillage and waste and accidents caused by blocking the train track.

[0022] At the same time, a connecting funnel can be set up to guide the scrap steel in the lower bin into the molten iron tank, isolating the feeding process and effectively preventing the molten iron from splashing out of the railway track during the feeding process;

[0023] By arranging a buffer structure in the connecting funnel, the possibility of molten iron splashing during the feeding process is further avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings used in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of a double-track train molten iron tank car positioning device and method provided in an embodiment of the present invention.

[0026] Figure 2 A top view of a double-track train molten iron tank car positioning device and method provided in an embodiment of the present invention.

[0027] Figure 3 A schematic diagram of the positions of a lower bin and a switch assembly of a double-track train molten iron tank car positioning device and method provided in an embodiment of the present invention.

[0028] Figure 4 A schematic diagram of a buffer structure of a double-track train molten iron tank car positioning device and method provided in an embodiment of the present invention.

[0029] Figure 5 A PLC logic control diagram of a double-track train molten iron tank car positioning device and method provided in an embodiment of the present invention.

[0030] In the figure: 1. train track; 2. molten iron tank; 3. laser beam photoelectric switch; 4. diffuse reflection switch; 5. beam photoelectric switch reflector; 6. signal warning light; 7. material discharge structure; 701. mounting plate; 702. connecting funnel; 7021. lifting cylinder; 7022. L-shaped mounting plate; 7023. limit rail; 7024. limit slider; 703. material discharge bin; 7031. threaded rod; 7032. movable block; 7033. limit rod; 7034. drive motor; 7035. belt transmission; 704. switch assembly; 7041. arc baffle; 7042. flip cylinder; 705. buffer structure; 7051. mounting frame; 7052. rotating motor; 7053. rotating bin; 7054. driving cylinder; 7055. iron rope; 7056. iron ball; 7057. limit sleeve. DETAILED DESCRIPTION

[0031] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions, for example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to the steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, the technical features in the various embodiments or single embodiments provided by the present invention are arbitrarily combined with each other to form a new technical solution. This combination is not restricted by the sequence of steps and / or the structural composition mode, but must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that this combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The embodiment of the present invention provides a double-track train molten iron tank car positioning device and method, such as Figure 1-2 As shown, it includes a train erected on two train tracks 1, a molten iron tank 2 is arranged on the train, two groups of laser beam photoelectric switches 3 and a diffuse reflection switch 4 located between the two groups of laser beam photoelectric switches 3 are arranged on one side wall of the train track 1, a beam photoelectric switch reflector 5 corresponding to the laser beam photoelectric switch 3 is arranged on the other side wall of the train track 1, signal warning lights 6 are respectively arranged on both side walls of the train track 1 for warning the trains on the two train tracks 1, and a material discharge structure 7 is also arranged on the train track 1 for respectively adding materials to the molten iron tanks 2 on the two lines.

[0034] The center line of the installation position of the two groups of laser beam photoelectric switches 3 is on the same horizontal line as the center of the discharge port of the discharge structure 7. The distance between the two groups of laser beam photoelectric switches 3 is greater than 400mm from the discharge port, while the reflection distance of the diffuse reflection switch 4 can only reach the distance of the 2-line molten iron tank 2. When the molten iron tank 2 car slowly drives to the discharge port area and the molten iron tank 2 body completely blocks the two pairs of laser beam photoelectric switches 3, the tank mouth is just below the discharge port. When the diffuse reflection switch 4 is activated, it indicates that the train molten iron tank 2 is accurately positioned on line 2, and the program controls the discharge port on line 2 to allow the addition of scrap steel; when the diffuse reflection switch 4 is not activated, it indicates that the train molten iron tank 2 is accurately positioned on line 1, and the discharge port on line 1 allows the addition of scrap steel, thereby realizing the positioning function of the double-line molten iron tank 2.

[0035] like Figure 2 , Figure 5 As shown, the control principle is: when there is no molten iron tank truck blocking the laser photoelectric switch, the two groups of laser photoelectric switches 3 emit light to the photoelectric switch reflector 5 and reflect it to the laser photoelectric switch 3. The laser photoelectric switch 3 does not work normally. The A and B signals of the laser photoelectric switch 3 do not come in the PLC program control, and the D and E signals do not come in the program control, reflecting that there is no molten iron tank truck signal; when the molten iron tank truck slowly enters the discharge port area and the tank body blocks the laser photoelectric switch 3, the laser photoelectric switch 3 Switch 3 will act. When the tank body blocks two laser photoelectric switches 3 at the same time, both switches will act. Signals A and B in the program control will trigger. At this time, when there is no molten iron tank blocking the diffuse reflection switch 4 within the effective distance, the diffuse reflection switch 4 will not act, C will be in a non-triggered state, and signal D will be connected, indicating that the train molten iron tank is on line 1; if there is a molten iron tank 2 blocking the diffuse reflection switch 4 within the effective distance, the diffuse reflection switch 4 will act, C will be in a triggered state, signal D will not be connected, and signal E will be connected, indicating that the molten iron tank is on line 2. After the logic control signal D or E comes, it means that the molten iron tank is accurately aligned to line 1 or line 2, and the signal warning light 6 can be controlled to light up, indicating that the train driver has stopped the signal. After accurately judging the alignment to position 1 or 2, the program interlocking control allows the scrap steel at the feeding port to be added to position 1 or 2, so that the double-line molten iron tank can be accurately aligned and the scrap steel can be added.

[0036] In this embodiment, Figure 1 , 3 As shown, the material discharge structure 7 includes a pair of mounting plates 701 fixed between the two side walls of the train track 1, a connecting funnel 702 which can move linearly up and down is provided between the pair of mounting plates 701, and a funnel-shaped material discharge bin 703 which can move linearly left and right is also provided on the pair of mounting plates 701, and a switch component 704 for covering the material discharge port is provided on the outer side of the bottom end of the material discharge bin 703, which can be used to realize the opening and closing of the bottom opening of the material discharge bin 703.

[0037] When the train molten iron tank 2 is precisely aligned with line 1, the mouth of molten iron tank 2 of line 1 is automatically opened, and the connecting funnel 702 corresponding to line 1 moves downward until its bottom end extends into the mouth of molten iron tank 2 of line 1, and then the unloading bin 703 is driven to move to the top of the connecting funnel 702 corresponding to line 1, and the bottom opening of the unloading bin 703 opens, and the scrap steel can enter the molten iron tank 2 of line 1 through the connecting funnel 702.

[0038] When the train molten iron tank 2 is precisely positioned at line 2, the mouth of line 2 molten iron tank 2 is automatically opened, and the connecting funnel 702 corresponding to line 2 moves downward until its bottom end extends into the mouth of line 2 molten iron tank 2, and then the unloading bin 703 is driven to move to the top of the connecting funnel 702 corresponding to line 2, and the bottom opening of the unloading bin 703 opens, and the scrap steel can enter the line 2 molten iron tank 2 through the connecting funnel 702.

[0039] As for how the connecting funnel 702 moves linearly up and down, a lifting cylinder 7021 is fixed between a pair of mounting plates 701 , and an L-shaped mounting plate 7022 is fixed to the output shaft of the lifting cylinder 7021 , and the connecting funnel 702 is fixed on the L-shaped mounting plate 7022 .

[0040] Start the lifting cylinder 7021, and the extension and retraction of the lifting cylinder 7021 can drive the connecting funnel 702 to move up and down through the L-shaped mounting plate 7022.

[0041] In order to ensure the stability of the connecting funnel 702 when it moves up and down, a limiting track 7023 is fixed to the side wall of the train track 1, and a limiting slider 7024 that is slidably connected to the limiting track 7023 is fixed on the L-shaped mounting plate 7022. When the L-shaped mounting plate 7022 drives the connecting funnel 702 to move up and down, under the guidance of the limiting slider 7024 and the limiting slide rail, the movement of the L-shaped mounting plate 7022 is more stable.

[0042] How does the lower bin 703 move linearly left and right? Figure 3 As shown, threaded rods 7031 are rotatably provided on the opposite surfaces of a pair of mounting plates 701 through bearings, and movable blocks 7032 are threadedly connected to the outer sides of the two threaded rods 7031. The pair of movable blocks 7032 are respectively fixed on the front and rear sides of the lower material bin 703. Two limiting rods 7033 are also fixed on the mounting plate 701. The limiting rods 7033 pass through the corresponding movable blocks 7032. When the threaded rods 7031 rotate, under the guiding action of the limiting rods 7033, the movable blocks 7032 can drive the lower material bin 703 to perform left and right linear movements.

[0043] A driving motor 7034 is fixed on one side mounting plate 701, and the output shaft of the driving motor 7034 is fixed to the end of the corresponding threaded rod 7031. The other ends of the two threaded rods 7031 are connected through a belt transmission member 7035. When the driving motor 7034 drives the corresponding threaded rod 7031 to rotate, the two threaded rods 7031 can rotate under the transmission action of the belt transmission member 7035.

[0044] As a specific structure of a switch component 704, Figure 3 As shown, the switch assembly 704 includes a pair of arc-shaped baffles 7041 hinged to the outer side of the bottom end of the connecting funnel 702, and a flip cylinder 7042 is hinged on both side walls of the connecting funnel 702, and the output shaft of the flip cylinder 7042 is hinged on the corresponding arc-shaped baffle 7041.

[0045] The flip cylinder 7042 can be extended and retracted to drive a pair of arc-shaped baffles 7041 to rotate relative to each other or rotate opposite to each other. When the pair of arc-shaped baffles 7041 rotate relative to each other until they fit together, the bottom opening of the connecting funnel 702 can be closed. When the pair of arc-shaped baffles 7041 rotate opposite to each other, they no longer block the bottom opening of the connecting funnel 702, and the bottom opening of the connecting funnel 702 can be opened.

[0046] Since the molten iron is easily splashed when the scrap steel falls into the molten iron tank 2 through the connecting funnel 702, a buffer structure 705 is also provided in the connecting funnel 702. Figure 4 As shown, the buffer structure 705 includes a mounting frame 7051 fixed in the connecting funnel 702, a rotating motor 7052 is fixed in the mounting frame 7051, a rotating bin 7053 is fixed on the output shaft of the rotating motor 7052, a driving cylinder 7054 is fixed in the rotating bin 7053, the output shaft of the driving cylinder 7054 passes through and extends to the bottom of the rotating bin 7053, three iron cables 7055 are fixed on the output shaft of the driving cylinder 7054, and iron balls 7056 are fixed on the ends of the three iron cables 7055.

[0047] When the bottom end of the connecting funnel 702 extends to the mouth of the molten iron tank 2, the driving cylinder 7054 is pushed out, causing the three iron ropes 7055 to move downward, reducing the distance between the iron ball 7056 and the liquid level in the molten iron tank 2, and the rotating motor 7052 drives the iron rope 7055 to drive the iron ball 7056 to rotate. When the scrap steel falls into the molten iron tank 2 from the connecting funnel 702, the rotating iron ball 7056 can play a buffering role, thereby reducing the possibility of molten iron splashing when the scrap steel falls into the molten iron tank 2.

[0048] A limiting sleeve 7057 is fixed to the inner bottom wall of the rotating bin 7053. The limiting sleeve 7057 is sleeved on the outer side of the output shaft of the driving cylinder 7054 to ensure the stability of the cylinder when it is extended and retracted.

[0049] A method for positioning a double-track train molten iron tank car comprises the following steps:

[0050] When the molten iron tank 2 slowly drives to the feeding port area, and the molten iron tank 2 blocks the two pairs of laser photoelectric switches 3, the tank mouth is just below the feeding port;

[0051] If the diffuse reflection switch 4 is activated, it means that the train molten iron tank 2 is on line 2, and the program controls the feeding port on line 2 to allow the addition of scrap steel;

[0052] The opening of the molten iron tank 2 of line 2 is automatically opened, and the corresponding connecting funnel 702 moves down until its bottom end extends into the opening of the molten iron tank 2 of line 2, and then the lower bin 703 is driven to move to the top of the corresponding connecting funnel 702, and the bottom opening of the lower bin 703 is opened, and the scrap steel can enter the molten iron tank 2 of line 2 through the connecting funnel 702;

[0053] When the scrap steel falls in, the three iron ropes 7055 are moved downward, reducing the distance between the iron ball 7056 and the liquid level in the molten iron tank 2, and the falling scrap steel is buffered by the rotating iron ball 7056 until the feeding is completed;

[0054] If the diffuse reflection switch 4 does not operate, it means that the train molten iron tank 2 is accurately aligned with line 1, and the lower feeding port of line 1 allows the addition of scrap steel, and the feeding action is performed in the same way.

[0055] In summary, when the present invention is in use, when the molten iron tank 2 car slowly drives to the discharge port area, the molten iron tank 2 body completely blocks the two pairs of laser photoelectric switches 3, and the tank mouth is just below the discharge port. When the diffuse reflection switch 4 is activated, it means that the train molten iron tank 2 is accurately positioned at line 2, and the program controls the discharge port of line 2 to allow the addition of scrap steel; when the diffuse reflection switch 4 is not activated, it means that the train molten iron tank 2 is accurately positioned at line 1, and the discharge port of line 1 allows the addition of scrap steel, thus realizing the positioning function of the double-line molten iron tank 2. By accurately positioning the molten iron tank cars of the two lines at the discharge port, accurate discharge is achieved, avoiding waste caused by spillage and accidents caused by blocking the railway track.

[0056] When the train molten iron tank 2 is precisely positioned at line 1, the mouth of the molten iron tank 2 at line 1 is automatically opened, and the connecting funnel 702 corresponding to line 1 moves downward until its bottom end extends into the mouth of the molten iron tank 2 at line 1, and then the unloading bin 703 is driven to move to the top of the connecting funnel 702 corresponding to line 1, and the bottom opening of the unloading bin 703 opens, and the scrap steel can enter the molten iron tank 2 at line 1 through the connecting funnel 702. When the train molten iron tank 2 is precisely positioned at line 2, similarly, the automatic positioning of the train molten iron tank and the addition of scrap steel can be realized.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A double-track train molten iron tank car positioning device, characterized in that: The invention comprises a train mounted on two train tracks (1), the train being provided with a molten iron tank (2), two groups of laser beam photoelectric switches (3) and a diffuse reflection switch (4) located between the two groups of laser beam photoelectric switches (3) being provided on one side wall of the train track (1), a beam photoelectric switch reflection plate (5) corresponding to the laser beam photoelectric switch (3) being provided on the other side wall of the train track (1), signal warning lights (6) being provided on both side walls of the train track (1) for warning the trains on the two train tracks (1), and a material discharge structure (7) being provided on the train track (1) for respectively feeding the molten iron tanks (2) on the two lines.

2. A double-track train molten iron tank car positioning device according to claim 1, characterized in that: The material discharge structure (7) comprises a pair of mounting plates (701) fixed between two side walls of the train track (1); a connecting funnel (702) capable of linear upward and downward movement is provided between the pair of mounting plates (701); a funnel-shaped material discharge bin (703) capable of linear leftward and rightward movement is also provided on the pair of mounting plates (701); a switch assembly (704) for covering a material discharge opening is provided on the outer side of the bottom end of the material discharge bin (703), which can be used to realize the opening and closing of the bottom opening of the material discharge bin (703).

3. A double-track train molten iron tank car positioning device according to claim 2, characterized in that: A lifting cylinder (7021) is fixed between a pair of the mounting plates (701), an L-shaped mounting plate (7022) is fixed to the output shaft of the lifting cylinder (7021), and the connection funnel (702) is fixed on the L-shaped mounting plate (7022).

4. A double-track train molten iron tank car positioning device according to claim 3, characterized in that: A limiting track (7023) is fixed to the side wall of the train track (1), and a limiting slider (7024) slidably connected to the limiting track (7023) is fixed to the L-shaped mounting plate (7022).

5. The double-track train molten iron tank car positioning device according to claim 2, characterized in that: The opposite surfaces of a pair of mounting plates (701) are both provided with threaded rods (7031) rotatably through bearings, and the outer sides of the two threaded rods (7031) are both threadedly connected with movable blocks (7032), and the pair of movable blocks (7032) are respectively fixed to the front and rear sides of the lower bin (703), and the mounting plates (701) are also fixed with limit rods (7033), and the limit rods (7033) penetrate the corresponding movable blocks (7032).

6. A double-track train molten iron tank car positioning device according to claim 5, characterized in that: A driving motor (7034) is arranged on one side of the mounting plate (701), and an output shaft of the driving motor (7034) is fixed to the end of a corresponding threaded rod (7031), and the other ends of the two threaded rods (7031) are connected via a belt transmission member (7035).

7. The double-track train molten iron tank car positioning device according to claim 2, characterized in that: The switch assembly (704) comprises a pair of arc-shaped baffles (7041) hingedly connected to the outer side of the bottom end of the connecting funnel (702), and a turning cylinder (7042) is hingedly connected to both side walls of the connecting funnel (702).

8. The double-track train molten iron tank car positioning device according to claim 2, characterized in that: A buffer structure (705) is also provided in the connecting funnel (702). The buffer structure (705) comprises a mounting frame (7051) fixed in the connecting funnel (702). A rotating motor (7052) is fixed in the mounting frame (7051). A rotating bin (7053) is fixed to the output shaft of the rotating motor (7052). A driving cylinder (7054) is fixed in the rotating bin (7053). The output shaft of the driving cylinder (7054) passes through and extends to the bottom of the rotating bin (7053). Three iron cables (7055) are fixed to the output shaft of the driving cylinder (7054). Iron balls (7056) are fixed to the ends of the three iron cables (7055).

9. A double-track train molten iron tank car positioning device according to claim 8, characterized in that: A limiting sleeve (7057) is fixed to the inner bottom wall of the rotating bin (7053), and the limiting sleeve (7057) is sleeved on the outer side of the output shaft of the driving cylinder (7054).

10. A positioning method for a double-track train molten iron tank car positioning device according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the train carrying the molten iron tank (2) slowly drives to the unloading area, the molten iron tank (2) blocks the two pairs of laser photoelectric switches (3), and the tank mouth is just below the unloading port; If the diffuse reflection switch (4) is activated, it means that the train molten iron ladle (2) is aligned with line 2, and the program controls the feeding port of line 2 to allow the addition of scrap steel; The opening of the second line molten iron tank (2) is automatically opened, and the corresponding connecting funnel (702) moves downward until its bottom end extends into the opening of the second line molten iron tank (2), and then the lower material bin (703) is driven to move to the top of the corresponding connecting funnel (702), and the bottom opening of the lower material bin (703) is opened, so that the scrap steel can enter the second line molten iron tank (2) through the connecting funnel (702); When the scrap steel falls in, the three iron ropes (7055) are moved downward, thereby reducing the distance between the iron ball (7056) and the liquid level in the molten iron tank (2), and the falling scrap steel is buffered by the rotating iron ball (7056) until the feeding is completed; If the diffuse reflection switch (4) does not operate, it means that the train molten iron tank (2) is accurately aligned with line 1, and the feeding port of line 1 allows the addition of scrap steel, and the feeding action is carried out in the same way.

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