CN117399609A - Electric rail-type flatcar for transporting molten iron with weighing function - Google Patents

Abstract

The invention relates to the field of molten iron transfer, specifically to an electric rail-type flat car for molten iron transfer with weighing, which includes: a car body; two sets of power mechanisms; a connecting mechanism including two connectors; and two detection mechanisms in a symmetrical state. Set on both sides of the connecting mechanism, each connector is connected to the detection mechanism; the weighing mechanism is set above the car body; the transfer platform is set above the weighing mechanism; the storage is set above the transfer platform; two holding devices , arranged in a symmetrical state on both sides of the transfer platform; the running track is arranged in a horizontal state under the car body; each detection mechanism is connected to the power mechanism, the power mechanism is used to drive the car body to move along the running track, and the storage is used to store the needs For the transferred molten iron, the clamping device is used to keep the storage stable during transportation. The two sets of power mechanisms of this device can immediately transmit power to the failed end after one of them fails, so that the entire track-type flat car can continue to be stable. run.

Description

Electric track-type flat car for molten iron transfer with weighing

Technical field

The invention relates to the field of molten iron transfer, and in particular to an electric rail-type flat car with weighing for transferring molten iron.

Background technique

With the increasing degree of industrialization, rail flat cars are also playing an increasingly important role. In many enterprises, flat cars have become a transportation tool. Flat cars generally move on guide rails to transport items. . With the development of steelmaking technology, flat cars with weighing have become one of the development directions. The weight of the molten steel is displayed in real time when the molten steel is tapped. This can not only control the weight of the molten steel, but also display the weight of the molten steel at any time during refining. This allows the amount of alloy to be accurately added according to process requirements, further improving the quality of the refined molten steel. Higher use value.

The announcement number is CN208150352U, which is an electric track-type flat car for molten iron transfer with weighing. The entire electric flat car has two power units, namely two sets of motors and reducers. Once one set of power units fails, the entire electric flat car will The car is not affected and is still running, safe and reliable. However, once one side of this equipment fails to power, although the other side can run, it will cause a jamming effect on the running track, causing damage to the running track and the equipment. During the operation, due to the jamming effect, the transportation effect will also be reduced. It will be unstable and prone to shaking, causing safety accidents. Therefore, there is an urgent need for a new type of track that can complete stable transportation when the track flat car has a power failure without damaging the running track and other equipment. Flatcar.

Contents of the invention

Based on this, it is necessary to provide an electric rail-type flat car with weighing for molten iron transfer in order to solve the existing technical problems.

In order to solve the existing technical problems, the technical solution adopted by the present invention is: an electric track-type flat car for transferring molten iron with weighing, including:

The car body is set in a horizontal state;

Two sets of power mechanisms are symmetrically arranged at one end below the vehicle body;

The connecting mechanism is arranged in the middle of one end below the vehicle body and is connected to the power mechanism, including two connectors arranged in a symmetrical state;

Two detection mechanisms are symmetrically arranged on both sides of the connecting mechanism, and each of the connectors is connected to the detection mechanism;

The weighing mechanism is installed above the vehicle body;

The transfer platform is set above the weighing mechanism;

The storage is arranged above the transfer platform;

Two holding devices are symmetrically arranged on both sides of the transfer platform;

The running track is set horizontally under the car body;

Each of the detection mechanisms is connected to a power mechanism. The power mechanism is used to drive the car body to move along the running track. The storage is used to store molten iron that needs to be transported. The clamping device is used to keep the storage during transportation. Stablize.

Further, each of the power mechanisms includes a power motor fixedly arranged under the vehicle body, a reducer arranged on one side of the power motor, a driving wheel arranged on one end of the vehicle body, and a drive wheel arranged on the other end of the vehicle body. The driven wheel on the side, the driving wheel is coaxially fixed with a driving roller, the power motor output end is connected to the power input end of the reducer, the driving roller penetrates the reducer and is connected to the power output end of the reducer, so The other end of the driving roller is connected to the detection mechanism.

Further, each of the detection mechanisms includes a detection shaft arranged coaxially with the other end of the driving roller, a cam fixedly clamped on the detection shaft, a support frame fixedly arranged at the bottom of the vehicle body, and a support frame fixedly arranged on the support frame. proximity sensor on.

Further, each of the connectors includes an outer connecting tube connected to the detection shaft, an adapter shaft slidably disposed in the outer connecting tube, a chuck fixedly disposed on one end of the adapter shaft, and a chuck fixedly disposed on one side of the chuck. The other side of the chuck is provided with a plurality of teeth in an annular shape along its axis, and an electromagnet is fixedly installed in the installation box.

Further, each of the connecting outer tubes is fixed with a coaxial sleeve and is provided with a support ring. One side of the support ring is annularly fixed with several first brackets along its axis. Each of the installation boxes is provided with a support ring along its axis. The axis is annularly fixed with the same number of second brackets as the first brackets, and a tension spring is provided between each first bracket and the second bracket.

Furthermore, each adapter shaft is provided with a plurality of limit bars annularly along its axis, and the inner wall of each connecting outer tube is annularly provided with a number of limit grooves consistent with the number of limit bars along its axis. , each of the limiting grooves corresponds to the limiting strip one-to-one.

Further, the connection mechanism also includes a mounting base fixedly disposed in the middle of one end of the bottom of the vehicle body, two support plates fixedly disposed at both ends of the mounting base in a symmetrical state, and a protective shell fixedly disposed between the two support plates. Each of the support plates is provided with a ball bearing, and each of the connecting outer tubes is connected to the support through a ball bearing.

Further, the weighing mechanism includes four load cells evenly spaced on the vehicle body, a load-bearing plate fixedly provided on all the load cells, and four buffers evenly spaced on the load-bearing plate. Each of the buffers includes a support column that penetrates the load-bearing plate and the vehicle body, limit nuts fixedly provided at both ends of the support column, and a buffer spring coaxially sleeved on the support column. One end of the buffer spring is in contact with the lower end of the load-bearing plate. The other end of the collision conflicts with the upper end of the car body.

Furthermore, anti-collision pads are fixedly provided at both ends of the transfer platform.

Compared with the prior art, the beneficial effects of the present invention are:

One: The electric molten iron transfer electric rail-type flat car with weighing of the present invention can detect and weigh the transferred molten iron at all times. It is no longer necessary to weigh the molten iron separately before transporting it to the rail flat car, saving time and effort. Improved production efficiency;

Second: The electric molten iron transfer rail-type flat car with weighing of the present invention has two sets of power mechanisms. After one of the power motors fails, the two power mechanisms can be quickly connected together through the connector to make the rail flat car Continue to complete the transportation work stably, greatly extending the life of the track flat car;

Third: The weighing electric rail-type flat car for transferring molten iron of the present invention has a simple structure, safe operation, and can complete the transportation work stably and efficiently for a long time.

Description of the drawings

Figure 1 is a schematic three-dimensional structural diagram of the embodiment;

Figure 2 is a schematic three-dimensional structural diagram of the weighing mechanism and the vehicle body of the embodiment;

Figure 3 is an enlarged schematic diagram of the structure at A in Figure 2;

Figure 4 is a schematic three-dimensional structural diagram of the power mechanism of the embodiment;

Figure 5 is a top view of the vehicle body of the embodiment;

Figure 6 is a cross-sectional view along D-D in Figure 5;

Figure 7 is an enlarged schematic diagram of the structure at B in Figure 6;

Figure 8 is a schematic three-dimensional structural diagram of the connector of the embodiment;

Figure 9 is a schematic diagram of the internal three-dimensional structure of the connection mechanism of the embodiment;

Figure 10 is a schematic three-dimensional structural diagram of the chuck and adapter shaft of the embodiment;

FIG. 11 is an exploded perspective view of the connection between the outer tube and the adapter shaft according to the embodiment.

The numbers in the figure are: 1. Car body; 2. Power mechanism; 3. Power motor; 4. Reducer; 5. Driving wheel; 6. Driving roller; 7. Driven wheel; 8. Connection mechanism; 9. Installation base ; 10. Protective shell; 11. Support plate; 12. Ball bearing; 13. Connector; 14. Connecting outer tube; 15. Limiting groove; 16. Adapter shaft; 17. Limiting bar; 18. Supporting ring ; 19. First bracket; 20. Chuck; 21. Teeth; 22. Installation box; 23. Electromagnet; 24. Second bracket; 25. Tension spring; 26. Detection mechanism; 27. Detection shaft; 28. Cam; 29. Proximity sensor; 30. Support frame; 31. Weighing mechanism; 32. Loading plate; 33. Buffer; 34. Support column; 35. Limit nut; 36. Buffer spring; 37. Load sensor; 38. Transfer platform; 39. Anti-collision pad; 40. Holder; 41. Storage; 42. Running track.

Detailed ways

In order to further understand the characteristics, technical means, and specific purposes and functions of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation modes.

Refer to Figure 1 to Figure 11;

Electric track-type flat cars for molten iron transfer with weighing, including:

Car body 1 is set in a horizontal state;

Two sets of power mechanisms 2 are symmetrically arranged at one end below the vehicle body 1;

The connecting mechanism 8 is arranged in the middle of the lower end of the vehicle body 1 and is connected to the power mechanism 2, and includes two connectors 13 arranged in a symmetrical state;

Two detection mechanisms 26 are symmetrically arranged on both sides of the connection mechanism 8, and each connector 13 is connected to the detection mechanism 26;

The weighing mechanism 31 is arranged above the vehicle body 1;

The transfer platform 38 is provided above the weighing mechanism 31;

Storage 41 is provided above the transfer platform 38;

Two clingers 40 are symmetrically arranged on both sides of the transfer platform 38;

The running track 42 is arranged horizontally below the car body 1;

Each of the detection mechanisms 26 is connected to the power mechanism 2. The power mechanism 2 is used to drive the car body 1 to move along the running track 42. The storage 41 is used to store molten iron that needs to be transferred. The clinging device 40 Used to keep the container 41 stable during transportation.

When the device is running, the car body 1 is driven by the power mechanism 2 and travels along the running track 42 to transport the molten iron in the storage 41. The two grippers 40 can enable the rail-type flat car to transport the storage 41. Keep the reservoir 41 stable. When molten iron is injected into the storage 41, the weighing mechanism 31 below the transfer platform 38 is used to weigh and detect the injected molten iron in order to control the injection weight, and the molten iron in the storage 41 can be measured at all times during refining and transportation. Monitoring can facilitate the addition of alloy amount according to process requirements in subsequent processes.

During the transfer of molten iron, when a set of power mechanisms 2 fails, in order to allow the car body 1 to continue to operate stably, the detection mechanism 26 first detects the failure, and then the connector 13 in the connection mechanism 8 operates to connect the intact The power of one power unit 2 is transmitted to the failed power unit 2, so that the vehicle body 1 can continue to operate stably.

In order to ensure that the power mechanism 2 can drive the vehicle body 1 to operate when the device is running, the specific features are as follows:

Each power mechanism 2 includes a power motor 3 fixedly arranged below the vehicle body 1, a reducer 4 arranged on one side of the power motor 3, a driving wheel 5 arranged on one end of the vehicle body 1 and a drive wheel 5 arranged on one side of the vehicle body 1. On the driven wheel 7 at the other end of the body 1, a driving roller 6 is coaxially fixed on the driving wheel 5. The output end of the power motor 3 is connected to the power input end of the reducer 4, and the driving roller 6 passes through The reducer 4 is connected to the power output end of the reducer 4, and the other end of the driving roller 6 is connected to the detection mechanism 26.

When the device is running, the power motor 3 is started, and the power motor 3 inputs power to the reducer 4. The reducer 4 runs, driving the driving roller 6 to rotate, and the driving roller 6 rotates to drive the driving wheel 5 to rotate. At this point, the two driving wheels 5 They are all driven to rotate by the power motor 3, and then cooperate with the driven wheel 7 to drive the vehicle body 1 to move along the running track 42.

In order to ensure the operation of the device, when one of the power motors 3 fails and cannot drive the driving roller 6 to rotate, the specific settings have the following characteristics:

Each detection mechanism 26 includes a detection shaft 27 arranged coaxially with the other end of the driving roller 6 , a cam 28 fixedly clamped on the detection shaft 27 , a support frame 30 fixedly arranged at the bottom of the vehicle body 1 and a fixed The proximity sensor 29 is provided on the support frame 30 .

When the device is running, the detection shaft 27 is driven to rotate by the active roller 6. At this time, the cam 28 will keep rotating and is detected by the proximity sensor 29, thereby driving the cam 28 on the detection shaft 27 to rotate. When one of the groups of power mechanisms 2 When the power motor 3 fails and cannot drive the driving roller 6 to rotate, the driving roller 6 cannot drive the detection shaft 27 to rotate. At this time, the detection shaft 27 no longer rotates. Assuming that the rotation period of the detection shaft 27 is 2s, then two seconds The proximity sensor 29 does not detect the cam 28 within 1 second, or detects the cam 28 for more than 1 s, which means that the detection shaft 27 stops rotating), and then under the action of the proximity sensor 29, its fault signal is transmitted to the connecting mechanism 8, and then the connector 13 is started, so that the power of the normally operating active roller 6 at the other end is transmitted to the detection shaft 27 that detects the fault, and then the detection shaft 27 transmits the power to the active roller 6, so that the device can be used after one of the power motors 3 fails. , can respond quickly and transmit intact power to the faulty active roller 6, ensuring that the entire rail-type flat car can continue to operate stably after a power failure and improve work efficiency.

In order to ensure that the connecting mechanism 8 can transmit power to the faulty active shaft when the device is running, the specific configuration has the following features:

Each connector 13 includes an outer connecting tube 14 connected to a detection shaft 27, an adapter shaft 16 slidably disposed in the outer connecting tube 14, a chuck 20 fixedly disposed on one end of the adapter shaft 16, and a fixed device. On the mounting box 22 on one side of the chuck 20, a plurality of teeth 21 are annularly provided on the other side of the chuck 20 along its axis. An electromagnet 23 is fixedly installed in the mounting box 22.

When the device is running, the proximity sensor 29 transmits the signal to the controller, and the controller controls the operation of the electromagnet 23 close to the detection axis 27 (the electromagnet 23 is provided with a controller, and the proximity sensor 29 and the electromagnet 23 are both connected to the controller). After that, the two electromagnets 23 are activated, causing the polarities of the two electromagnets 23 to be opposite. Then, due to "like-sex repels and opposite-sex attracts", the two electromagnets 23 move closer to each other, thus causing the two chucks 20 to move closer to each other. The teeth 21 on each chuck 20 are clamped, so that the two originally unconnected driving rollers 6 are connected. Then the normally operating driving roller 6 transmits the power to the faulty driving roller through the two chucks 20 clamping each other. Roller 6 ensures the stable operation of the track-type flat car.

In order to ensure that the device is running, when the fault problem is solved, the two chucks 20 can be separated. The specific settings have the following features:

Each connecting outer tube 14 is fixed with a supporting ring 18 in a coaxial sleeve. One side of the supporting ring 18 is annularly fixed with a plurality of first brackets 19 along its axis. Each mounting box 22 is provided with a supporting ring 18 . The same number of second brackets 24 as the first brackets 19 are fixed annularly along its axis, and a corresponding tension spring 25 is provided between each first bracket 19 and the second bracket 24 .

When the device is running, when the two electromagnets 23 approach each other, the second bracket 24 is driven to move together, so that all the tension springs 25 are stretched. After the fault is solved, the controller controls the electromagnets 23 to stop running, so that If the polarity of the two electromagnets 23 is the same or the running electromagnet 23 is directly turned off, the tension spring 25 releases the tension and retracts to the initial length, thereby causing the two chucks 20 to separate.

In order to ensure that the adapter shaft 16 does not rotate when sliding along its axis in the connecting outer tube 14 when the device is running, the following features are specifically provided;

Each adapter shaft 16 is provided with a number of limit bars 17 annularly along its axis, and the inner wall of each connecting outer tube 14 is annularly provided with a number of limit bars 17 consistent with the number of limit bars 17 along its axis. grooves 15, each of the limiting grooves 15 corresponds to the limiting bar 17 in a one-to-one manner.

When the adapter shaft 16 approaches each other due to the two chucks 20 or moves away due to the tension spring 25 releasing the pulling force, the adapter shaft 16 slides along the connecting outer tube 14, and with the cooperation of the limit groove 15 and the limit bar 17, the adapter shaft 16 rotates. The connecting shaft 16 will not rotate when sliding, thereby ensuring that the sliding of the connecting shaft 16 will not twist the tension spring 25 together to ensure the operational stability of the device.

In order to ensure that the connecting outer tube 14 can rotate stably when the device is running, the specific features are as follows:

The connection mechanism 8 also includes a mounting base 9 fixedly disposed in the middle of one end of the bottom of the vehicle body 1, two support plates 11 fixedly disposed at both ends of the mounting base 9 in a symmetrical state, and a protection device fixedly disposed between the two support plates 11. In the shell 10, each support plate 11 is provided with a ball bearing 12, and each connecting outer tube 14 is connected to the support through the ball bearing 12.

When the device is running, the connecting outer tube 14 rotates stably on the support plate 11 under the action of the ball bearing 12, and the protective shell 10 can protect the internal equipment during the operation of the rail-type flat car, making the rail-type flat car The service life is greatly increased.

In order to demonstrate the structure of the weighing mechanism 31, the specific configuration has the following features:

The weighing mechanism 31 includes four load cells 37 evenly spaced on the vehicle body 1, a load-bearing plate 32 fixedly provided on all the load cells 37, and four buffers evenly spaced on the load-bearing plate 32. 33. Each buffer 33 includes a support column 34 that penetrates the load-bearing plate 32 and the vehicle body 1, a limit nut 35 fixedly provided at both ends of the support column 34, and a buffer spring coaxially sleeved on the support column 34. 36. One end of the buffer spring 36 is in conflict with the lower end of the bearing plate 32 and the other end is in conflict with the upper end of the vehicle body 1 .

When the device is running, when the storage 41 is being injected with molten iron or the rail-type flat car is transporting the storage 41 after the injection of molten iron is completed, the load sensor 37 detects the amount of molten iron in the storage 41 at all times, and its buffer spring 36 is to prevent the molten iron from Excessive injection damages the load cell 37, that is, within the load-bearing range of the load cell 37, the buffer spring 36 does not work. Only after the weight borne by the load cell 37 exceeds its load range, the buffer spring 36 is activated for buffer protection.

In order to ensure that the car body 1 can operate stably when the device is running, the specific settings have the following characteristics:

Anti-collision pads 39 are fixedly provided at both ends of the transfer platform 38 .

When the rail-type flat car is running, the anti-collision pad 39 is provided so that when the rail-type flat car cooperates with other equipment during operation, it can protect the entire rail-type flat car and avoid hard contact damage to the equipment.

Working principle: When the device is running, the power motor 3 inputs power to the reducer 4, the reducer 4 runs, driving the driving roller 6 to rotate, the driving roller 6 rotates to drive the driving wheel 5 to rotate, so far, both driving wheels 5 are rotated. The power motor 3 drives the rotation, and then cooperates with the driven wheel 7 to drive the car body 1 to move along the running track 42 to transport the molten iron in the storage 41. The two grippers 40 can make the track-type flat car transport the storage 41. , so that the storage 41 remains stable. When molten iron is injected into the storage 41, the load sensor 37 weighs and detects the amount of molten iron in the storage 41 at all times in order to control the injection weight, and can monitor the molten iron in the storage 41 at all times during refining and transportation. , which can facilitate the addition of alloy amount according to process requirements in subsequent processes.

During the transfer of molten iron, when one of the power motors 3 fails and cannot operate, the driving roller 6 cannot drive the detection shaft 27 to rotate. At this time, the detection shaft 27 no longer rotates (assuming that the rotation period of the detection shaft 27 is 2 seconds). , then the proximity sensor 29 does not detect the cam 28 within two seconds, or detects the cam 28 for more than 1 s, which means that the detection shaft 27 stops rotating), and then the proximity sensor 29 transmits the fault signal to the electromagnet close to the detection shaft 27 23. Then the two electromagnets 23 are activated, causing the two electromagnets 23 to have opposite polarities. Then, due to "like-sex repels and opposite-sex attracts", the two electromagnets 23 move closer to each other, thus causing the two chucks 20 to move closer to each other. The teeth 21 on the two chucks 20 are clamped, so that the two originally unconnected driving rollers 6 are connected, and then the normally operating driving roller 6 transmits power to the fault by clamping the two chucks 20 with each other. The active roller 6 ensures the stable operation of the track-type flat car. When the two chucks 20 approach each other, the second bracket 24 is driven to move together, so that all the tension springs 25 are stretched. After the fault is solved, the electromagnet 23 stops running, causing the polarity of the two electromagnets 23 to change. The same or directly close the running electromagnet 23, the tension spring 25 releases the tension and retracts to the initial length, thereby causing the two chucks 20 to separate. In this process, with the cooperation of the limit groove 15 and the limit bar 17, the adapter shaft 16 will not rotate when sliding in the connecting outer tube 14, so that the device can operate stably.

The above embodiments only express one or several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (9)

1. Electric rail-mounted flatcar is transported to molten iron of weighing in area, its characterized in that includes:

a vehicle body (1) which is arranged in a horizontal state;

the two groups of power mechanisms (2) are symmetrically arranged at one end below the vehicle body (1);

the connecting mechanism (8) is arranged in the middle of one end below the vehicle body (1) and is connected with the power mechanism (2), and comprises two connectors (13) which are symmetrically arranged;

the two detection mechanisms (26) are symmetrically arranged at two sides of the connecting mechanism (8), and each connector (13) is connected with the detection mechanism (26);

the weighing mechanism (31) is arranged above the vehicle body (1);

the transferring platform (38) is arranged above the weighing mechanism (31);

a reservoir (41) disposed above the transfer platform (38);

the two claspers (40) are symmetrically arranged at two sides of the transfer platform (38);

the running rail (42) is horizontally arranged below the vehicle body (1);

each detection mechanism (26) is connected with a power mechanism (2), the power mechanism (2) is used for driving the vehicle body (1) to move along a running track (42), the storage device (41) is used for storing molten iron to be transported, and the hugging device (40) is used for enabling the storage device (41) to be kept stable during transportation.

2. The electric rail-type flatcar for transporting molten iron with weighing according to claim 1, wherein each power mechanism (2) comprises a power motor (3) fixedly arranged below a car body (1), a speed reducer (4) arranged on one side of the power motor (3), a driving wheel (5) arranged on one side of one end of the car body (1) and a driven wheel (7) arranged on one side of the other end of the car body (1), a driving roller (6) is coaxially and fixedly arranged on the driving wheel (5), the output end of the power motor (3) is connected with the power input end of the speed reducer (4), the driving roller (6) penetrates through the speed reducer (4) and is connected with the power output end of the speed reducer (4), and the other end of the driving roller (6) is connected with the detection mechanism (26).

3. The electric rail-type flatcar for transporting molten iron with weighing according to claim 2, wherein each detection mechanism (26) comprises a detection shaft (27) coaxially arranged with the other end of the driving roller (6), a cam (28) fixedly clamped on the detection shaft (27), a support frame (30) fixedly arranged at the bottom of the car body (1) and a proximity sensor (29) fixedly arranged on the support frame (30).

4. The electric rail-type flatcar for transporting molten iron with weighing according to claim 3, wherein each connector (13) comprises a connecting outer tube (14) connected with a detection shaft (27), a transfer shaft (16) arranged in the connecting outer tube (14) in a sliding manner, a chuck (20) fixedly arranged at one end of the transfer shaft (16) and a mounting box (22) fixedly arranged at one side of the chuck (20), a plurality of clamping teeth (21) are annularly arranged at the other side of the chuck (20) along the axis of the chuck, and an electromagnet (23) is fixedly arranged in the mounting box (22).

5. The electric rail type flatcar for transporting molten iron with weighing according to claim 4, wherein a supporting ring (18) is fixedly sleeved on each connecting outer tube (14), a plurality of first brackets (19) are fixedly arranged on one side of the supporting ring (18) along the axis of the supporting ring in a ring shape, second brackets (24) with the same number as the first brackets (19) are fixedly arranged on each mounting box (22) along the axis of the mounting box in a ring shape, and tension springs (25) are correspondingly arranged between each first bracket (19) and each second bracket (24).

6. The electric rail-type flatcar for transporting molten iron with weighing according to claim 5, wherein a plurality of limit bars (17) are annularly arranged on each transfer shaft (16) along the axis of the transfer shaft, a plurality of limit grooves (15) with the same number as the limit bars (17) are annularly arranged on the inner wall of each connecting outer tube (14) along the axis of the connecting outer tube, and each limit groove (15) corresponds to the limit bar (17) one by one.

7. The electric rail-type flatcar for transporting molten iron with weighing according to claim 6, wherein the connecting mechanism (8) further comprises a mounting base (9) fixedly arranged in the middle of one end of the bottom of the car body (1), two support plates (11) fixedly arranged at two ends of the mounting base (9) in a symmetrical state and a protective shell (10) fixedly arranged between the two support plates (11), a ball bearing (12) is arranged on each support plate (11), and each connecting outer tube (14) is connected with the support through the ball bearing (12).

8. The electric rail-mounted flatcar for transporting molten iron with weighing according to claim 1, wherein the weighing mechanism (31) comprises four weighing sensors (37) uniformly arranged on the car body (1) at intervals, a bearing plate (32) fixedly arranged on all the weighing sensors (37) and four buffers (33) uniformly arranged on the bearing plate (32) at intervals, each buffer (33) comprises a support column (34) penetrating through the bearing plate (32) and the car body (1), limit nuts (35) fixedly arranged at two ends of the support column (34) and a buffer spring (36) coaxially sleeved on the support column (34), and one end of the buffer spring (36) is abutted against the lower end of the bearing plate (32) while the other end is abutted against the upper end of the car body (1).

9. The electric rail-type flatcar for transporting molten iron with weighing according to claim 1, wherein anti-collision pads (39) are fixedly arranged at two ends of the transporting platform (38).