Protective device for molten iron trolley of nodular cast iron pipeline

Abstract

The utility model discloses a nodular cast iron pipeline molten iron trolley protection device which comprises a ladle, a molten iron trolley and a track, the ladle is placed on the molten iron trolley, the molten iron trolley is provided with trolley wheels, and the molten iron trolley is driven by the trolley wheels to run along the track. A gear motor is installed on the small wheel, a motor cable is arranged on the gear motor, and a power source is provided through the motor cable on the gear motor so as to drive the small wheel to operate. A cable drum is installed below the front end of the molten iron trolley and used for tightening incoming cables on the two sides of the trolley and providing connection transfer for motor cables. And a smooth water dripping plate is arranged above one side close to the cable drum. The hot metal trolley is simple in structure, convenient to manufacture and stable in structure, can provide great protection for the cable drum, avoids accidents caused by the fact that cables on the cable drum are scalded, improves operation stability of the hot metal trolley, reduces equipment faults, and provides powerful guarantee for production operation.

Description

Technical Field

[0001] This utility model relates to the field of molten iron ladle transfer systems, specifically a protective device for molten iron trolleys in ductile iron pipelines. Background Technology

[0002] my country's ductile iron pipe industry began in the early 1990s and has developed rapidly with the strong support of the China Urban Water Supply Association. After nearly 30 years of practical use, its safety and practicality have been widely recognized by the water supply industry. In 2008, the domestic annual output reached 2.2 million tons, 11 times that of 1990. As my country is a water-scarce country with over 600 cities facing water shortages and over 200 cities experiencing severe water shortages, the water supply and water conservation efforts are flourishing, and ductile iron pipes have broad development prospects. Ductile iron pipe fittings are an important component connecting ductile iron pipes. They possess the essence of iron and the properties of steel, exhibiting excellent corrosion resistance, good ductility, good sealing performance, and easy installation. They are mainly used for municipal and industrial water supply, gas transmission, and oil transportation, offering high cost-effectiveness. During the manufacturing process, ductile iron pipe fittings require the use of sand cores to form the inner cavity of the fittings.

[0003] In terms of quality, ductile iron pipe fittings require a spheroidization grade of 1-3 with a spheroidization rate greater than 80%, thus significantly improving the material's mechanical properties. It possesses the essence of iron and the performance of steel. Its microstructure consists of ferrite with a small amount of pearlite, exhibiting good mechanical properties, excellent corrosion resistance, good ductility, good sealing performance, and easy installation. It is mainly used for water supply, gas transmission, and oil transportation in municipal and industrial enterprises.

[0004] As a cast product, ductile iron pipes require the initial production of molten iron at the beginning of their entire manufacturing process. After the molten iron is tapped from the furnace, magnesium wire is added to improve its composition, thereby enhancing corrosion resistance under various complex geological conditions after burial. During the molten iron transfer process, a ladle is used, and the ladle is then transported by a molten iron cart to a magnesium wire adding machine.

[0005] In the tapping area, molten iron is poured from the blast furnace into multiple medium-frequency electric furnaces, where it is heated. Once the temperature meets the requirements, the molten iron is transported by a molten iron trolley to a magnesium wire transfer machine. Therefore, the molten iron trolley is a unique and critical piece of equipment, and its stability directly affects the normal operation of the entire production line.

[0006] Due to the frequent transfer of molten iron, the entire tapping area in front of the furnace is often filled with a large amount of splattering iron. Furthermore, excessive movement during the operation of a ladle full of molten iron, or carelessness during the addition of magnesium wire, or an overly violent chemical reaction, can cause the molten iron in the ladle to overflow and flow onto the molten iron trolley. A transmission device is installed at the bottom of the molten iron trolley. A motor drives a reducer to rotate the wheels, and the molten iron trolley runs along a long track. Therefore, a cable reel is equipped to wind and tighten the motor cable, keeping it under constant tension to prevent it from being dragged on the ground and damaged by the wheels or repeated friction, which could lead to machine malfunctions. Due to the limitations of the trolley's structure and transmission method, the cable reel is installed at the end of the trolley near the molten iron area, making it susceptible to burns from the molten iron. Therefore, a protective device for the molten iron trolley using ductile iron pipes is urgently needed to solve this problem. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this utility model provides a protective device for molten iron trolleys in ductile iron pipelines, which solves the problem that cable reels are easily burned by molten iron when installed on the side of the trolley end near the molten iron area due to limitations in the vehicle structure and transmission method.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution: a protective device for a molten iron trolley in a ductile iron pipeline, comprising a ladle, a molten iron trolley, and a track. The ladle is placed on the molten iron trolley, which is equipped with wheels. The molten iron trolley runs along the track driven by the wheels. A geared motor is installed on each wheel, and a motor cable is provided on the geared motor. Power is supplied through the motor cable to drive the wheels. A cable reel is installed below the front end of the molten iron trolley to tighten the incoming cables on both sides of the trolley and to provide a connection for the motor cable. A smooth water-repellent plate is installed above the side near the cable reel.

[0011] Preferably, the top of the smooth water-flowing plate is flush with the body of the molten iron car, and it has a certain tilt angle to the outside; the smooth water-flowing plate is provided with supporting diagonal braces along both sides of the car body to provide structural support.

[0012] Preferably, a water-blocking edge is installed on each of the two sides of the smooth water-flowing plate to prevent molten iron from sliding down from both sides and to avoid molten iron accumulating on the track and affecting the operation of the molten iron trolley.

[0013] Preferably, the smooth water-flowing plate is equipped with two herringbone-shaped water guide plates distributed in a V-shape from the top center to the bottom, thereby forming two water-flowing outlets on the smooth water-flowing plate, so that the scattered molten iron flows out from the water-flowing outlets on both sides and falls outside the track.

[0014] Preferably, the smooth water-flowing plate is a rectangular steel plate, which is fully welded and installed on the molten iron trolley; the connection between the supporting diagonal brace and the smooth water-flowing plate is reinforced by welding, and the weld is treated with rust prevention.

[0015] Preferably, the cable reel is made of waterproof and fireproof material, and its surface is coated with a wear-resistant coating to adapt to harsh working environments and extend its service life.

[0016] (III) Beneficial Effects

[0017] This utility model provides a protective device for molten iron trolleys in ductile iron pipelines, which has the following advantages compared with the prior art:

[0018] It is easy to manufacture and has a stable structure, which can provide great protection for cable reels, prevent accidents caused by the cables on the reels being burned, improve the operational stability of molten iron trolleys, reduce equipment failures, and provide strong support for production operations. Attached Figure Description

[0019] Figure 1 Side view of the overall installation of the protective device for the molten iron trolley;

[0020] Figure 2 Top view of the installation of the protective device for the molten iron trolley;

[0021] In the diagram: 1. Ladle of molten iron; 2. Molten iron trolley; 3. Track; 4. Gear motor; 5. Trolley wheel; 6. Motor cable; 7. Cable reel; 8. Smooth water-flowing plate; 9. Supporting diagonal bracing; 10. Water-blocking edge; 11. Herringbone water guide plate; 12. Water outlet. Detailed Implementation

[0022] like Figure 1-2 As shown, this utility model provides a technical solution: a protective device for a molten iron trolley in a ductile iron pipeline, including a ladle 1, a molten iron trolley 2, and a track 3. The ladle 1 is placed on the molten iron trolley 2, which is equipped with small wheels 5. The molten iron trolley 2 runs along the track 3 driven by the small wheels 5. A geared motor 4 is installed on the small wheels 5, and a motor cable 6 is provided on the geared motor 4. Power is provided through the motor cable 6 on the geared motor 4, thereby driving the small wheels 5 to run. A cable reel 7 is installed below the front end of the molten iron trolley 2 to tighten the incoming cables on both sides of the trolley and to provide a connection transfer for the motor cable 6. A smooth water-flowing plate 8 is installed above the side near the cable reel 7.

[0023] The top of the smooth water flow plate 8 is flush with the body of the molten iron car 2, and it has a certain angle of inclination to the outside; the smooth water flow plate 8 is provided with supporting diagonal braces 9 along both sides of the car body to provide structural support.

[0024] A water-blocking edge 10 is installed on each of the two sides of the smooth water-flowing plate 8 to prevent molten iron from sliding down from both sides and to avoid molten iron accumulating on the track 3 and affecting the operation of the molten iron trolley 2.

[0025] The smooth water flow plate 8 has two herringbone-shaped water guide plates 11 installed from the top center to the bottom, thus forming two water flow outlets 12 on the smooth water flow plate 8, so that the scattered molten iron flows out from the water flow outlets 12 on both sides and falls outside the track 3.

[0026] The smooth water flow plate 8 is a rectangular steel plate that is fully welded onto the molten iron car 2; the connection between the supporting diagonal brace 9 and the smooth water flow plate 8 is reinforced by welding, and the welded areas are treated with rust prevention.

[0027] The cable reel 7 is made of waterproof and fireproof materials, and its surface is coated with a wear-resistant coating to adapt to harsh working environments and extend its service life.

[0028] In Example 1, during operation, a rectangular smooth-surfaced water-flowing plate 8 is made from a smooth steel plate and fully welded to the upper part of the end of the molten iron cart 2 near the cable reel 7. It has a certain outward tilt angle. When molten iron falls onto the molten iron cart 2, the molten iron can flow naturally through this steel plate to the ground below the cart, serving as a water-flowing plate. Furthermore, because the smooth-surfaced water-flowing plate 8 extends a certain length, it can also shield the cable reel 7 below from splashing molten iron from other locations. The molten iron cart 2 runs along the track. To prevent the molten iron flowing from the smooth-surfaced water-flowing plate 8 from accumulating on the track 3 and affecting the cart's operation, the smooth-surfaced water-flowing plate 8 is slightly wider than the track. A straight water guide plate is installed from the top center to the lower two sides of the smooth-surfaced water-flowing plate 8, forming a herringbone structure. A water-blocking edge 10 is installed on each of the other two edges of the smooth-surfaced water-flowing plate 8. To ensure that when molten iron slides down from the smooth water-flowing plate 8, it can only flow out from the top along the gap between the herringbone guide plate 11 and the water-blocking edge 10, i.e., the water-flowing outlet 12, and thus fall onto the ground outside the trolley track 3.

[0029] In Example 2, during operation, limit blocks can be installed on both sides of track 3, and a buffer device that cooperates with the limit blocks is provided on the molten iron trolley 2. During operation, when the molten iron trolley 2 approaches the limit blocks, the on-site operator slows down the vehicle speed in advance to ensure that the buffer device makes smooth contact with the limit blocks, ensuring stable operation and preventing derailment accidents.

[0030] In Example 3, during operation, a shock-absorbing pad can be installed between the molten iron ladle 1 and the molten iron carriage 2. This pad is made of a new type of high-temperature resistant and heat-resistant material (ceramic fiber composite material). Under high-temperature conditions, this material not only does not soften or deform, but also continues to exhibit excellent shock-absorbing performance, effectively reducing the impact of the molten iron ladle 1's shaking on the molten iron carriage 2 during transportation. During operation, if minor bumps or unevenness are encountered on the track 3, the shaking generated by the molten iron ladle 1 will be transmitted to the shock-absorbing pad first. The high elasticity of the rubber comes into play, absorbing and buffering most of the impact force through its own compression and rebound, greatly reducing the impact on the frame structure of the molten iron carriage 2, and also improving the stability of carrying the molten iron ladle 1.

[0031] All of the above embodiments require regular inspection to check for deformation or damage caused by high-temperature burning or frequent impact of molten iron. If any problems are found, maintenance personnel should be immediately arranged to repair or replace them to avoid affecting their normal guiding and blocking functions. Similarly, the shock-absorbing pads also need regular inspection to check for fiber breakage or thinning due to long-term high-temperature erosion. If any abnormalities are found, they should be replaced promptly to ensure stable shock absorption and anti-scalding effects. The limit blocks on both sides of track 3 and the buffer devices on the molten iron trolley 2 also need regular adjustment to ensure that they work in harmony during trolley operation, effectively preventing derailment and ensuring the safe and efficient operation of the entire molten iron transportation process.

[0032] In summary, the device is easy to manufacture, has a stable structure, provides excellent protection for the cable reel, eliminates accidents caused by the cable being burned on the reel, improves the operational stability of the molten iron trolley, reduces equipment failures, and provides strong support for production operations.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for a duct molten pig trolley, comprising a ladle (1), a molten pig trolley (2) and a track (3), characterized in that: The ladle (1) is placed on the ladle trolley (2), the ladle trolley (2) is provided with trolley wheels (5), the ladle trolley (2) is driven by the trolley wheels (5) to run along the track (3); the trolley wheels (5) are provided with a speed reducer motor (4), the speed reducer motor (4) is provided with a motor cable (6), and the power supply is provided through the motor cable (6) on the speed reducer motor (4) to drive the trolley wheels (5) to run; the ladle trolley (2) is provided with a cable drum (7) below the front end, which is used for tightening the cable on both sides of the trolley and providing connection for the motor cable (6); a smooth water flowing plate (8) is installed above the side near the cable drum (7).

2. The protective device for the pig-iron trolley of the nodular cast iron pipeline according to claim 1, characterized in that: The top of the smooth water flowing plate (8) is flush with the body of the ladle trolley (2), and has a certain inclination angle outward; the smooth water flowing plate (8) is provided with a support inclined rib (9) along the body on both sides to provide structural support.

3. The protective device for the pig-iron trolley of the nodular cast iron pipeline according to claim 1, characterized in that: A water blocking edge (10) is installed on each side edge of the smooth water flowing plate (8), which is used to block the molten iron from sliding off from both sides to avoid the accumulation of molten iron on the track (3) affecting the running of the ladle trolley (2).

4. The protective device for the pig-iron trolley of the nodular cast iron pipeline according to claim 1, characterized in that: The smooth water flowing plate (8) is provided with two herringbone-shaped water guide plates (11) from the top middle to the bottom, thereby forming two water flowing openings (12) on the smooth water flowing plate (8), so that the scattered molten iron is left from both sides of the water flowing opening (12) and falls outside the track (3).

5. The protective device for a duct pig-iron trolley according to claim 2, characterized in that: The smooth water flowing plate (8) is a rectangular steel plate with smooth surface, which is installed on the ladle trolley (2) by full welding; the connection parts of the support inclined rib (9) and the smooth water flowing plate (8) are all welded and reinforced, and the welding parts are treated for rust prevention.

6. The protective device for a duct pig-iron trolley according to claim 1, characterized in that: The cable drum (7) is made of waterproof and fireproof material, and is provided with a wear-resistant coating on the surface to adapt to harsh working environment and prolong the service life.

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