Motor starting water resistance device of coal water slurry mill

Abstract

The utility model discloses a water resistance device for starting a motor of a coal water slurry mill, which comprises a water resistance cabinet, clear water and an electrolytic powder solution, and further comprises a transmission mechanism, a water tank, a water tank and a water pump, an electrolysis tank is arranged on the inner wall of the bottom of the water resistance cabinet, three water tanks are arranged in the electrolysis tank, three funnels are arranged on the outer wall of the top of the electrolysis tank, the funnels are communicated with the water tanks, guide pipes are arranged on the outer walls of the bottoms of the funnels, leakage holes which are distributed at equal intervals are formed in the outer walls of the circumferences of the guide pipes, and the leakage holes are communicated with the water tanks. The clean water is located in the water tank, and the electrolytic powder solution is used in cooperation with the funnel, the guide pipe and the leakage holes. According to the motor starting water resistance device of the coal water slurry mill, clear water and an electrolytic powder solution can be uniformly mixed, voltage regulation and control in starting operation of the ball mill are effectively achieved, impact on a power grid is reduced, a good control function is achieved, and operation stability and safety of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water resistance cabinets, in particular to a water resistance device for starting a motor of a water coal slurry mill. Background Art

[0002] A water resistance cabinet, also known as a liquid resistance cabinet or a water resistance starting cabinet, is a device used to limit the starting current and achieve soft starting during the starting process of a motor. It is a new type of starter developed to improve the starting performance of medium and large-sized wound-rotor AC asynchronous motors or high-voltage squirrel-cage motors, and is suitable for the heavy-load starting of motors of large equipment.

[0003] However, when the traditional water resistance device for starting a motor of a water coal slurry mill is used, it is necessary to inject clear water and an electrolytic powder solution into the electrolytic tank. When the electrolytic powder solution is injected, it is easy to mix unevenly, resulting in little change in resistance value, affecting the starting of the motor, and the stability is not high. Content of the Utility Model

[0004] The utility model discloses a water resistance device for starting a motor of a water coal slurry mill, aiming to solve the technical problem that when the traditional water resistance device for starting a motor of a water coal slurry mill is used, it is necessary to inject clear water and an electrolytic powder solution into the electrolytic tank. When the electrolytic powder solution is injected, it is easy to mix unevenly, resulting in little change in resistance value, affecting the starting of the motor body (5), and the stability is not high.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water resistance device for starting a motor of a water coal slurry mill, including a water resistance cabinet, clear water, and an electrolytic powder solution, further comprising:

[0007] A transmission mechanism: The transmission mechanism is located inside the water resistance cabinet;

[0008] An electrolytic tank is provided on the bottom inner wall of the water resistance cabinet. Three water tanks are provided inside the electrolytic tank. Three funnels are provided on the outer wall of the top of the electrolytic tank. The funnels are communicated with the water tanks. A conduit is provided on the outer wall of the bottom of the funnel. Equally spaced leakage holes are formed on the circumferential outer wall of the conduit. The clear water is located inside the water tank. The electrolytic powder solution is respectively used in cooperation with the funnel, the conduit, and the leakage holes.

[0009] In this solution, sufficient clear water is added to the three water tanks of the electrolysis tank. The clear water contains certain minerals and impurities, which can, to a certain extent, play a role in adjusting the water resistance, making the test results more stable and accurate. The electrolytic powder solution is an electrolytic powder solution with a concentration of 8%. It is introduced through a funnel by a conduit and leaks into the water tank from multiple leak hole positions, which can disperse the electrolytic powder solution evenly. Instead of being introduced linearly from a high place, it can be introduced in all directions in the water tank, making the clear water and the electrolytic powder solution mix evenly. During the subsequent working process, the resistance value changes accordingly, improving the operation stability and safety of the equipment.

[0010] In a preferred solution, the transmission mechanism includes a motor and a connecting roller provided at one end of the output shaft of the motor body. An electric control box is provided on the inner wall of the water resistance cabinet. The motor body is located on the outer wall of the top of the electric control box. A connecting shaft is connected inside the electric control box. A transmission wheel is provided at the top of the connecting shaft. The same transmission belt is provided on the circumferential outer walls of the transmission wheel and the connecting roller. Three electrode guide rods are provided on both sides of the outer wall of the bottom of the electric control box. The electrode guide rods pass through the bottom end of the electrolysis tank and are connected to a moving electrode plate. A fixed electrode plate is provided on the inner wall of the bottom of the water tank. The top ends of the three electrode guide rods are connected to the same insulating connection rod, and the insulating connection rod is connected to the connecting shaft.

[0011] Adopting the above technical solution, during the starting process of the motor body, it drives the connecting roller to rotate. Under the action of the transmission belt, it drives the transmission wheel to rotate. Under the transmission action, the distance between the moving electrode plate and the fixed electrode plate in the water tank is adjusted, thereby playing a role in dynamically adjusting the resistance value of the water resistance cabinet. The resistance value of the liquid resistance automatically realizes a stepless change from large to small within a predetermined time. When it approaches zero, the liquid resistance is automatically cut off, and the motor body is put into operation, playing a role in voltage division and current limiting, realizing a good control function, effectively solving the voltage regulation problem during the starting and operation of the ball mill, and reducing the impact on the power grid.

[0012] As can be seen from the above, the water resistance device for starting the motor of the water coal slurry mill includes a water resistance cabinet, clear water, and an electrolytic powder solution, and also includes:

[0013] A transmission mechanism: The transmission mechanism is located inside the water resistance cabinet;

[0014] An electrolytic tank is provided on the inner wall of the bottom of the water resistance cabinet. Three water tanks are provided inside the electrolytic tank. Three funnels are provided on the outer wall of the top of the electrolytic tank. The funnels are communicated with the water tanks. A conduit is provided on the outer wall of the bottom of the funnel. Leak holes are formed at equal intervals on the circumferential outer wall of the conduit. The clear water is located inside the water tank. The electrolytic powder solution is used in cooperation with the funnel, the conduit and the leak holes respectively. The water resistance device for starting the motor of the coal water slurry mill provided by the utility model can mix the clear water and the electrolytic powder solution evenly, effectively solve the voltage regulation during the starting and operation of the ball mill, reduce the impact on the power grid, realize good control functions, and improve the operation stability and safety of the equipment. Brief Description of the Drawings

[0015] Figure 1 FIG. is a schematic diagram of the overall structure of the water resistance device for starting the motor of the coal water slurry mill proposed by the present utility model.

[0016] Figure 2 FIG. is a schematic diagram of the internal structure of the electrolytic tank of the water resistance device for starting the motor of the coal water slurry mill proposed by the present utility model.

[0017] Figure 3 FIG. is a schematic diagram of the transmission structure of the water resistance cabinet of the water resistance device for starting the motor of the coal water slurry mill proposed by the present utility model.

[0018] In the drawings: 1. Water resistance cabinet; 2. Cabinet door; 3. Electrolytic tank; 4. Electric control box; 5. Motor body; 6. Water tank; 7. Funnel; 8. Conduit; 9. Leak hole; 10. Connecting frame; 11. Conductive electrode rod; 12. Moving conductive electrode plate; 13. Fixed conductive electrode plate; 14. Driving wheel; 15. Connecting roller; 16. Transmission belt; 17. Clear water; 18. Electrolytic powder solution. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the present application that is required to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0020] The water resistance device for starting the motor of the water coal slurry mill disclosed by the present utility model is mainly applied to the scenario where when using the traditional water resistance device for starting the motor of the water coal slurry mill, it is necessary to inject clear water and electrolytic powder solution into the electrolytic tank. When injecting the electrolytic powder solution, it is easy to mix unevenly, resulting in little change in resistance value, affecting the motor startup and having low stability.

[0021] Referring to Figure 1 、 Figure 2 and Figure 3 , the water resistance device for starting the motor of the water coal slurry mill includes a water resistance cabinet 1, clear water 17, and electrolytic powder solution 18, and further includes:

[0022] A transmission mechanism: The transmission mechanism is located inside the water resistance cabinet 1;

[0023] On the bottom inner wall of the water resistance cabinet 1, there is an electrolytic tank 3. Inside the electrolytic tank 3, there are three water tanks 6. On the top outer wall of the electrolytic tank 3, there are three funnels 7. The funnels 7 are communicated with the water tanks 6. On the bottom outer wall of the funnels 7, there are conduits 8. On the circumferential outer wall of the conduits 8, there are equally spaced leakage holes 9. The clear water 17 is located inside the water tanks 6. The electrolytic powder solution 18 is respectively used in cooperation with the funnels 7, the conduits 8, and the leakage holes 9.

[0024] In this solution, sufficient clear water 17 is respectively added into the three water tanks 6 of the electrolytic tank 3. The clear water 17 contains certain minerals and impurities, which can play a role in adjusting the water resistance to a certain extent. The electrolytic powder solution 18 uses an electrolytic powder solution with a concentration of 8%. The electrolytic powder solution 18 is introduced through the conduit 8 from the funnel 7 and leaks into the water tank 6 from the positions of multiple leakage holes 9. The electrolytic powder solution 18 can be dispersed evenly and is not introduced linearly from a high place. It can be introduced in all directions inside the water tank 6, so that the clear water 17 and the electrolytic powder solution 18 are mixed evenly.

[0025] Among them, the electrolytic tank 3 is made of high molecular polypropylene material. In this way, the high molecular polypropylene material has the functions of acid and alkali resistance and high temperature resistance, so that the electrolytic tank 3 is not affected by the working process and can react better.

[0026] Among them, the conduit 8 is set to be spiral, and the conduit 8 is adapted to the inside of the water tank 6. In this way, the conduit 8 spirally winds inside the water tank 6 and is distributed in all directions of the water tank 6, so that the electrolytic powder solution 18 is more evenly dispersed when introduced and the reaction effect is better.

[0027] It should be noted that: The funnels 7 and the conduits 8 are set to be detachable structures. After using for a certain period, the funnels 7 and the conduits 8 are disassembled for cleaning and maintenance, and then installed for the introduction work.

[0028] Referring to Figure 1 、 Figure 2 and Figure 3, in a preferred embodiment, the transmission mechanism includes a motor body 5 and a connecting roller 15 provided at one end of the output shaft of the motor body 5. An electric control box 4 is provided on the inner wall of the water resistance cabinet 1. The motor body 5 is located on the outer wall of the top of the electric control box 4. A connecting shaft is connected inside the electric control box 4. A transmission wheel 14 is provided at the top end of the connecting shaft. A transmission belt 16 is provided on the circumferential outer walls of the transmission wheel 14 and the connecting roller 15. Three guide electrode rods 11 are provided on both sides of the outer wall of the bottom of the electric control box 4. The guide electrode rods 11 pass through the bottom end of the electrolysis tank 3 and are fixedly connected with a moving guide electrode plate 12. A fixed guide electrode plate 13 is provided on the inner wall of the bottom of the water tank 6. The top ends of the three guide electrode rods 11 are connected with the same insulating connecting rod, and the insulating connecting rod is connected with the connecting shaft.

[0029] Specifically, during the startup process of the motor body 5, the connecting roller 15 is driven to rotate. Under the action of the transmission belt 16, the transmission wheel 14 is driven to rotate. Furthermore, under the transmission action, the distance between the moving guide electrode plate 12 and the fixed guide electrode plate 13 in the water tank 6 is adjusted, playing a role in dynamically adjusting the resistance value of the water resistance cabinet 1. When the motor body 5 starts, the water resistance cabinet 1 works. Under the transmission action, the moving guide electrode plate 12 starts to move from top to bottom, the distance from the fixed guide electrode plate 13 gradually decreases, and the resistance value also gradually decreases. At this time, the current at the end of the motor body 5 gradually increases and the speed gradually increases, playing a role in smooth startup. When the resistance of the water resistance cabinet 1 approaches 0, the operation of the water resistance cabinet 1 ends, and the motor body 5 runs at full load. After a few seconds of delay, the moving guide electrode plate 12 automatically resets to the original state and waits for the next startup operation.

[0030] Among them, the moving guide electrode plate 12 and the fixed guide electrode plate 13 are used in cooperation, and the electrolysis tank 3 and the motor body 5 are used in cooperation. In this way, by adjusting the distance between the moving guide electrode plate 12 and the fixed guide electrode plate 13, the resistance value of the water resistance cabinet 1 is changed. When the resistance value decreases, the current of the motor body 5 increases, so that the motor body 5 runs smoothly without being affected by a large starting current and insufficient starting torque, and will not cause an impact on the power grid when the high-voltage motor body 5 starts instantaneously.

[0031] It should be noted that the position of the conduit 8 is staggered from the position of the moving guide electrode plate 12, and the introduction of the electrolytic powder solution 18 by the conduit 8 and the movement of the moving guide electrode plate 12 do not affect each other.

[0032] Refer to Figure 1 , in a preferred embodiment, cabinet doors 2 are hinged on both outer walls of the water resistance cabinet 1, and a connecting frame 10 is provided on one outer wall of the electric control box 4.

[0033] Specifically, the interior of the water resistance cabinet 1 can be viewed and repaired regularly through the cabinet doors 2 on both sides. Through the connecting frame 10, electrical component groups, PICs, and secondary external terminal blocks can be connected to achieve electric control.

[0034] Working principle: When in use, first inject enough clear water 17 into the three water tanks 6. At the position of the funnel 7, introduce the electrolytic powder solution 18 into the conduit 8, and then let it leak into the water tank 6 from the positions of multiple leakage holes 9, so that the electrolytic powder solution 18 can be evenly dispersed, and then be evenly mixed with the clear water 17 in the water tank 6. Then start the motor body 5, the water resistance cabinet 1 works, the motor body 5 drives the connecting roller 15 to rotate, and under the action of the transmission belt 16, drives the transmission wheel 14 to rotate. Under the transmission action, the moving guide electrode plate 12 starts to operate from top to bottom, the distance from the fixed guide electrode plate 13 gradually decreases, and the resistance value also gradually decreases. At this time, the current at the motor body 5 end gradually increases and the speed gradually increases, so as to achieve smooth start. When the resistance of the water resistance cabinet 1 approaches 0, the liquid resistance is automatically removed, and the motor body 5 is put into operation.

[0035] As described above, only the preferred specific implementation mode of the present utility model is given, but the protection scope of the present utility model is not limited thereto. The substitution can be the substitution of part of the structure, device, method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present utility model and its inventive concept should be covered within the protection scope of the present utility model.

Claims

1. Water resistance device for starting the motor of a water coal slurry mill, comprising a water resistance cabinet (1), clear water (17) and an electrolytic powder solution (18), characterized in that, It further includes: A transmission mechanism: The transmission mechanism is located inside the water resistance cabinet (1); On the inner wall of the bottom of the water resistance cabinet (1), there is an electrolysis tank (3). Inside the electrolysis tank (3), there are three water tanks (6). On the outer wall of the top of the electrolysis tank (3), there are three funnels (7). The funnels (7) are communicated with the water tanks (6). On the outer wall of the bottom of the funnel (7), there is a conduit (8). On the circumferential outer wall of the conduit (8), there are equally spaced leakage holes (9). The clear water (17) is located inside the water tank (6). The electrolytic powder solution (18) is used in cooperation with the funnel (7), the conduit (8), and the leakage holes (9).

2. The water resistance device for starting the motor of the water coal slurry mill according to claim 1, characterized in that The electrolysis tank (3) is made of high molecular polypropylene material.

3. The motor starting water resistance device for the water coal slurry mill according to claim 2, characterized in that, The conduit (8) is arranged in a spiral shape and is adapted to the inside of the water tank (6).

4. The water resistance device for starting the motor of the water coal slurry mill according to claim 1, characterized in that, The transmission mechanism includes a motor body (5) and a connecting roller (15) provided at one end of the output shaft of the motor body (5). On the inner wall of the water resistance cabinet (1), there is an electric control box (4). The motor body (5) is located on the outer wall of the top of the electric control box (4). Inside the electric control box (4), there is a connecting shaft. At the top of the connecting shaft, there is a transmission wheel (14). On the circumferential outer walls of the transmission wheel (14) and the connecting roller (15), there is the same transmission belt (16).

5. The water resistance device for starting the motor of the water coal slurry mill according to claim 4, characterized in that, On both sides of the outer wall of the bottom of the electric control box (4), there are three electrode guide rods (11). The electrode guide rods (11) pass through the bottom end of the electrolysis tank (3) and are connected to a moving electrode plate (12). On the inner wall of the bottom of the water tank (6), there is a fixed electrode plate (13). The tops of the three electrode guide rods (11) are connected to the same insulating connection rod, and the insulating connection rod is connected to the connecting shaft.

6. The motor starting water resistance device for the water coal slurry mill according to claim 5, characterized in that, The moving electrode plate (12) is used in cooperation with the fixed electrode plate (13), and the electrolysis tank (3) is used in cooperation with the motor body (5).

7. The water resistance device for starting the motor of the water coal slurry mill according to claim 4, characterized in that, On both outer walls of the water resistance cabinet (1), there are doors (2) connected by hinges. On one outer wall of the electric control box (4), there is a connecting frame (10).

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