Circulating cooling device of shield tunneling machine frequency converter

Abstract

The utility model discloses a circulating cooling device of a shield tunneling machine frequency converter, which relates to the technical field of shield tunneling machine frequency converters and comprises a fixing plate, a mounting frame is fixed in the middle of the top of the fixing plate, a cooling mechanism is arranged at the top of the fixing plate, and a filtering and cleaning mechanism is arranged at the top of the mounting frame. The cooling mechanism comprises a cooling pipe fixed to one side of the mounting frame in a penetrating mode, a pump machine is fixed to the inlet end of the cooling pipe, a connecting pipe is fixed to the inlet end of the pump machine, a cooling box is fixed to the top of the fixing plate, and temperature conduction pieces are evenly fixed to the top of the cooling box in a penetrating mode. According to the circulating cooling device of the shield tunneling machine frequency converter, the cooling mechanism is arranged, cooled air is conveyed into the frequency conversion cabinet to cool the frequency converter, and therefore the cooling effect is improved, the situation that when the underground temperature is high, the cooling effect of air fed through air cooling is not good is avoided, and use of the frequency converter is prevented from being affected.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine frequency converter technology, specifically a circulating cooling device for tunnel boring machine frequency converters. Background Technology

[0002] The cutterhead of a tunnel boring machine is driven by multiple motors. The frequency converter that controls the motors must ensure the balance between the multiple motors under load. At the same time, the environment at the tunnel boring machine construction site is harsh and the ambient temperature is high. In addition, the frequency converter uses a lot of electronic components. In order to ensure its safety, the frequency converter needs to be cooled. The frequency converter is usually located in the frequency converter cabinet, so it is necessary to reduce the temperature inside the frequency converter cabinet.

[0003] Chinese patent CN217721824U discloses a cooling device for a tunnel boring machine frequency converter, including a cooler, an air inlet coil, a dehumidifier, and an exhaust fan. The cooler is filled with coolant; the air inlet coil is installed inside the cooler; the dehumidifier is installed between the cooler and the frequency converter cabinet, and the air inlet pipe of the dehumidifier is connected to the air outlet of the air inlet coil; the exhaust fan is installed on the frequency converter cabinet, and the air inlet of the exhaust fan is connected to the air outlet of the dehumidifier. The airflow entering the frequency converter cabinet is cooled by a cooler and dehumidified by a dehumidifier. The dry and cold airflow is then sent to the frequency converter cabinet by an exhaust fan to cool the frequency converter inside the cabinet, ensuring the normal operation of the frequency converter. As can be seen from the above patent, when cooling the frequency converter of the tunnel boring machine, a cooling fan is often used to cool the inside of the frequency converter cabinet. However, in places with high underground temperatures, the air cooling effect is not good, resulting in poor cooling effect and easily affecting the normal operation of the frequency converter. Therefore, we have proposed a circulating cooling device for the frequency converter of the tunnel boring machine. Summary of the Invention

[0004] The purpose of this invention is to provide a circulating cooling device for the frequency converter of a tunnel boring machine (TBM) to solve the problem in the prior art that when cooling the TBM frequency converter, cooling fans are often used to cool the inside of the frequency converter cabinet. However, in places with high underground temperatures, the air cooling effect is not good, resulting in poor cooling effect and easily affecting the normal operation of the frequency converter.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circulating cooling device for a tunnel boring machine frequency converter, including a fixed plate, a mounting frame fixed to the top center of the fixed plate, a cooling mechanism provided on the top of the fixed plate, and a filter cleaning mechanism provided on the top of the mounting frame;

[0006] The cooling mechanism includes a cooling pipe that passes through and is fixed to one side of the mounting frame. A pump is fixed to the inlet end of the cooling pipe, and a connecting pipe is fixed to the inlet end of the pump. A cooling box is fixed to the top of the fixing plate. Temperature-conducting sheets are uniformly fixed through the top of the cooling box. A temperature-conducting plate is fixed to the top of the temperature-conducting sheets, and a semiconductor refrigeration block is fixed to the top of the temperature-conducting plate.

[0007] Preferably, the cooling mechanism further includes a mounting bracket fixed to the inner side wall of the mounting frame, and a cooling fan is fixed to the top of the mounting bracket.

[0008] Preferably, the outlet end of the cooling pipe is fixed to one side of the inner cavity of the cooling box, and the connecting pipe is fixed to one side of the inner cavity of the cooling box to facilitate the circulation of coolant.

[0009] Preferably, an injection pipe is fixed to the top edge of the cooling tank, and a sealing plug is connected inside the injection pipe to facilitate the injection of coolant.

[0010] Preferably, the cooling fan is located at the top of the cooling pipe, and the cooling pipe is S-shaped to increase the flow path of the coolant and increase the contact area with the air.

[0011] Preferably, the filtration and cleaning mechanism includes a filter screen fixed to the top of the mounting frame by bolts, concave plates fixed to the top of both sides of the mounting frame, slide rods symmetrically fixed to the top of opposite sides of the two concave plates, sliders sliding on the outer side of the slide rods, movable plates fixed to opposite sides of the two sliders, cleaning brushes fixed to the bottom of the movable plates by bolts, a connecting seat fixed to the middle of one side of the movable plate, a drive motor fixed to the top of the fixed plate, a turntable fixed to the end of the output shaft of the drive motor, a connecting shaft fixed to the top edge of the turntable, and a connecting rod rotatably connected to the outer side of the connecting shaft.

[0012] Preferably, one end of the connecting rod rotates inside the connecting seat, and the bottom of the cleaning brush is in contact with the top of the filter screen, which facilitates cleaning of the filter screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This application utilizes a cooling mechanism that activates a semiconductor refrigeration block to transfer low temperatures to a temperature-conducting plate and then to a temperature-conducting sheet, thereby cooling the coolant inside the cooling box. A pump is then activated to transport the coolant through connecting pipes to the cooling pipes, and then it flows back into the cooling box, achieving circulation. Simultaneously, the activation of a cooling fan creates negative pressure, causing the gas to pass through the cooling pipes and be cooled. The cooled air is then delivered to the inverter cabinet to cool the inverter, thus improving the cooling effect. This avoids the problem of poor cooling effect of air-cooled gas when the underground temperature is high, preventing any impact on the inverter's operation.

[0015] 2. In this application, by using the filter cleaning mechanism, when the cooling fan is started, the intake air is filtered through the filter screen to prevent impurities in the air from entering the inverter cabinet. At the same time, the drive motor is started, which drives the turntable to rotate, causing the connecting shaft to deflect. This causes the connecting rod to move the connecting seat back and forth, which in turn causes the moving plate to move the cleaning brush back and forth to clean the filter screen, preventing impurities from accumulating on the filter screen surface and preventing them from affecting the passage of air. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the mounting frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the cooling box of this utility model;

[0019] Figure 4 This is a schematic diagram of the filter cleaning mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the planar structure of the filter cleaning mechanism of this utility model.

[0021] The following are the labeling elements in the diagram: 100, Fixed plate; 200, Mounting frame; 300, Cooling mechanism; 310, Mounting bracket; 320, Cooling fan; 330, Cooling pipe; 340, Pump; 350, Connecting pipe; 360, Cooling box; 361, Injection pipe; 370, Temperature guide plate; 371, Temperature guide fin; 380, Semiconductor cooling block; 400, Filter cleaning mechanism; 410, Filter screen; 420, Concave plate; 430, Slide rod; 440, Slider; 450, Moving plate; 460, Cleaning brush; 470, Connecting seat; 480, Drive motor; 490, Turntable; 491, Connecting shaft; 492, Connecting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Figures 1-5 As shown, the present invention provides a technical solution for a circulating cooling device for a tunnel boring machine frequency converter, including a fixed plate 100, an installation frame 200 fixed at the top center of the fixed plate 100, a cooling mechanism 300 at the top of the fixed plate 100, and a filter cleaning mechanism 400 at the top of the installation frame 200.

[0024] Please see Figure 2 and Figure 3 The cooling mechanism 300 includes a cooling pipe 330 that penetrates and is fixed to one side of the mounting frame 200. A pump 340 is fixed to the inlet end of the cooling pipe 330, and a connecting pipe 350 is fixed to the inlet end of the pump 340. A cooling box 360 is fixed to the top of the fixing plate 100. Temperature-conducting fins 371 are uniformly fixed through the top of the cooling box 360. A temperature-conducting plate 370 is fixed to the top of the temperature-conducting fins 371, and a semiconductor cooling block 380 is fixed to the top of the temperature-conducting plate 370. The cooling mechanism 300 also includes a mounting bracket 310 fixed to the inner wall of the mounting frame 200. A cooling fan 320 is fixed to the top of the mounting bracket 310. The outlet end of the cooling pipe 330 penetrates and is fixed to one side of the inner cavity of the cooling box 360, and the connecting pipe 350 penetrates and is fixed to one side of the inner cavity of the cooling box 360. An injection pipe 361 is fixed to the top edge of the cooling box 360, and the injection... The internal connection of pipe 361 is sealed with a plug; the cooling fan 320 is located at the top of cooling pipe 330, which is S-shaped; by using the cooling mechanism 300, the semiconductor cooling block 380 is activated to cool the liquid inside the cooling box 360, transferring the low temperature to the temperature-conducting plate 370 and then to the temperature-conducting sheet 371. After cooling, the pump 340 is activated to transport the coolant through the connecting pipe 350 to the inside of cooling pipe 330 and then back into cooling box 360 to achieve circulation. At the same time, the activation of the cooling fan 320 generates negative pressure, causing the gas to pass through the cooling pipe 330 for cooling. The cooled air is then transported to the inside of the frequency converter cabinet to cool the frequency converter, thereby improving the cooling effect and preventing poor cooling effect of the air-cooled gas when the underground temperature is high, which could affect the operation of the frequency converter.

[0025] Please see Figure 4 and Figure 5The filter cleaning mechanism 400 includes a filter screen 410 fixed to the top of the mounting frame 200 by bolts. Concave plates 420 are fixed to the top of both sides of the mounting frame 200. Slide rods 430 are symmetrically fixed to the top of opposite sides of the two concave plates 420. Sliding sliders 440 slide on the outer side of the slide rods 430. Moving plates 450 are fixed to opposite sides of the two sliding sliders 440. A cleaning brush 460 is fixed to the bottom of the moving plate 450 by bolts. A connecting seat 470 is fixed to the middle of one side of the moving plate 450. A drive motor 480 is fixed to the top of the fixed plate 100. A turntable 490 is fixed to the end of the output shaft of the drive motor 480. A connecting shaft 491 is fixed to the top edge of the turntable 490. A connecting rod 492 rotates on the outside of 491; one end of the connecting rod 492 rotates inside the connecting seat 470, and the bottom of the cleaning brush 460 is in contact with the top of the filter screen 410; with the setting of the filter cleaning mechanism 400, when the cooling fan 320 is started, the gas drawn in is filtered through the filter screen 410 to prevent impurities in the air from entering the inverter cabinet. At the same time, the drive motor 480 is started, driving the turntable 490 to rotate, causing the connecting shaft 491 to deflect, thereby causing the connecting rod 492 to drive the connecting seat 470 to move back and forth, causing the moving plate 450 to drive the cleaning brush 460 to move back and forth, cleaning the filter screen 410, preventing impurities from accumulating on the surface of the filter screen 410, and preventing it from affecting the passage of gas.

[0026] In use, this utility model is as follows: First, the fixing plate 100 is installed at the ventilation opening of the frequency converter cabinet. During cooling, the semiconductor cooling block 380, pump 340, and cooling fan 320 are activated. The activation of the semiconductor cooling block 380 initiates cooling, transferring the low temperature to the temperature-conducting plate 370 and then to the temperature-conducting sheet 371, thus cooling the coolant inside the cooling box 360. The activation of the pump 340 then transports the coolant through the connecting pipe 350 to the cooling pipe 330, and then back into the cooling box 360, achieving circulation. Simultaneously, the cooling fan 320... When the fan starts, it generates negative pressure, causing the gas to pass through the cooling pipe 330 for cooling. The cooled air is then delivered into the inverter cabinet to cool the inverter. When the cooling fan 320 starts, the intake gas is filtered through the filter screen 410 to prevent impurities in the air from entering the inverter cabinet. At the same time, the drive motor 480 starts, driving the turntable 490 to rotate, causing the connecting shaft 491 to deflect. This causes the connecting rod 492 to drive the connecting seat 470 to move back and forth, causing the moving plate 450 to drive the cleaning brush 460 to move back and forth, cleaning the filter screen 410 and preventing it from affecting the gas passage.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A circulating cooling device for a tunnel boring machine frequency converter, characterized in that: Includes a fixing plate (100), a mounting frame (200) is fixed to the top center of the fixing plate (100), a cooling mechanism (300) is provided on the top of the fixing plate (100), and a filter cleaning mechanism (400) is provided on the top of the mounting frame (200). The cooling mechanism (300) includes a cooling pipe (330) that passes through and is fixed to one side of the mounting frame (200). A pump (340) is fixed at the inlet end of the cooling pipe (330), and a connecting pipe (350) is fixed at the inlet end of the pump (340). A cooling box (360) is fixed at the top of the fixing plate (100). A temperature-conducting sheet (371) is uniformly fixed through the top of the cooling box (360). A temperature-conducting plate (370) is fixed at the top of the temperature-conducting sheet (371), and a semiconductor refrigeration block (380) is fixed at the top of the temperature-conducting plate (370).

2. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 1, characterized in that: The cooling mechanism (300) also includes a mounting bracket (310) fixed to the inner side wall of the mounting frame (200), and a cooling fan (320) is fixed to the top of the mounting bracket (310).

3. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 1, characterized in that: The outlet end of the cooling pipe (330) is fixed to one side of the inner cavity of the cooling box (360), and the connecting pipe (350) is fixed to one side of the inner cavity of the cooling box (360).

4. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 1, characterized in that: An injection pipe (361) is fixed to the top edge of the cooling box (360), and a sealing plug is connected inside the injection pipe (361).

5. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 2, characterized in that: The cooling fan (320) is located at the top of the cooling pipe (330), which is S-shaped.

6. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 1, characterized in that: The filter cleaning mechanism (400) includes a filter screen (410) fixed to the top of the mounting frame (200) by bolts. Concave plates (420) are fixed to the top of both sides of the mounting frame (200). Slide rods (430) are symmetrically fixed to the top of the opposite sides of the two concave plates (420). Slider (440) slides on the outside of the slide rods (430). Movable plates (450) are fixed to the opposite sides of the two sliders (440). A cleaning brush (460) is fixed to the bottom of the movable plate (450) by bolts. A connecting seat (470) is fixed to the middle of one side of the movable plate (450). A drive motor (480) is fixed to the top of the fixed plate (100). A turntable (490) is fixed to the end of the output shaft of the drive motor (480). A connecting shaft (491) is fixed to the top edge of the turntable (490). A connecting rod (492) rotates on the outside of the connecting shaft (491).

7. The circulating cooling device for the frequency converter of the tunnel boring machine according to claim 6, characterized in that: One end of the connecting rod (492) rotates inside the connecting seat (470), and the bottom of the cleaning brush (460) is in contact with the top of the filter screen (410).

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