Shield tunneling machine anti-condensation constant temperature self-filtering oil tank

Abstract

The application provides a shield machine anti-condensation water constant-temperature self-filtering oil tank, which comprises an oil tank body, the oil tank body is a double-layer shell structure, and an oil filter is internally installed; a condensation guide plate is obliquely installed below the top plate of the oil tank body, a tubular heat exchanger is respectively installed in the interlayer of the front and back surfaces, each tubular heat exchanger is connected to a compression refrigeration equipment through a pipeline, a breather is installed above the oil tank body, a control box, a temperature sensor and a humidity sensor are installed on one side, an internal pipeline of the oil tank body is connected to an external filtering device, the tubular heat exchanger, the temperature sensor, the humidity sensor, the compression refrigeration equipment and the filtering device are respectively signal-connected to a controller in the control box to form an oil tank measurement and control system. The shield machine anti-condensation water constant-temperature self-filtering oil tank can quickly, accurately and stably control the oil temperature through the temperature sensor for measuring the oil temperature and the PID control method.

Description

Technical Field

[0001] This invention belongs to the field of tunnel boring machine cooling systems, and in particular relates to a constant temperature self-filtering oil tank for preventing condensation in tunnel boring machines. Background Technology

[0002] The majority of the working mechanisms of a tunnel boring machine (TBM) are driven by a hydraulic system, including the hydraulic propulsion and articulation system, cutterhead drive system, segment assembly system, auxiliary hydraulic system, screw conveyor system, main hydraulic oil tank, and cooling and filtration system. The hydraulic system can be considered the heart of the TBM, playing a crucial role in tunneling. The proper functioning of the hydraulic system directly affects the efficiency of the TBM. With increasing demand for underground space, increasingly complex construction environments, and advancements in underground space technology, the requirements for various TBM systems are becoming increasingly stringent, including the oil temperature cooling system. The stability of the hydraulic system oil temperature directly affects the stable tunneling operation. During winter or in high-altitude areas with large temperature differences, oil stratification or even emulsification can easily occur when the machine is stopped, potentially leading to hydraulic system failure. In actual tunneling, insufficient oil circulation capacity can cause oil temperature to rise, forcing the machine to be shut down for cooling, thus affecting the tunneling capacity. Summary of the Invention

[0003] In view of this, the present invention aims to propose a constant temperature self-filtering oil tank for shield tunneling machines to prevent condensation, so as to solve the problems of excessively high and low temperatures that occur during the actual use and storage of the oil tank, improve the cleanliness of the oil tank during the actual use of the shield tunneling machine, and ensure the stable operation of the equipment.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A constant-temperature self-filtering oil tank for shield tunneling machines to prevent condensation includes an oil tank body with a double-shell structure. The inner shell is used to hold the oil, and an oil filter is installed in the oil tank body. A condensation guide plate is installed obliquely below the top plate of the oil tank body. Tubular heat exchangers are installed in the interlayer between the front and rear sides of the oil tank body. Each tubular heat exchanger is connected to a compression refrigeration device through a pipe. The bottom of the oil tank body is used to drain condensate. A breather is installed on the top of the oil tank body, and a control box, temperature sensor, and humidity sensor are installed on one side. The internal pipelines of the oil tank body are connected to the external filtration device. The tubular heat exchangers, temperature sensor, humidity sensor, compression refrigeration device, and filtration device are all connected to the controller in the control box to form an oil tank monitoring and control system.

[0006] Furthermore, the front and rear sides of the oil tank body are respectively a front side plate and a rear side plate, and a condensation guide plate is installed obliquely between the front side plate and the rear side plate, with the lower side of the condensation guide plate being the bottom end of the guide plate.

[0007] Furthermore, a tubular heat exchanger is wound between the interlayers of the front and rear side plates.

[0008] Furthermore, the condensation guide plate has a corrugated shape.

[0009] Furthermore, the bottom inner layer of the fuel tank body is provided with a sandwich partition.

[0010] Furthermore, two breathers are installed on the top of the oil tank body, and the bottom of the breathers is located above the condenser guide plate.

[0011] Furthermore, the respirator is a hollow tube.

[0012] Furthermore, the control box also includes an oil heating start / stop button S1, an oil temperature cooling start / stop button S2, a filter circulation start / stop button S3, a temperature mode selection switch S4, a dehumidification mode selection switch S5, a temperature sensor, and a humidity sensor, all connected in parallel between the PLC and the positive terminal of the power supply. Three fuses, a temperature detection display, and a humidity detection display are all installed in the control box and are all connected in parallel between the PLC and the negative terminal of the power supply.

[0013] Compared with existing technologies, the anti-condensation water constant temperature self-filtering oil tank for tunnel boring machines described in this invention has the following advantages:

[0014] (1) The shield machine anti-condensation water constant temperature self-filtering oil tank of the present invention measures the oil temperature by temperature sensor and adopts PID control method, which can quickly, accurately and stably control the oil temperature; the oil tank is connected to an external filtration and circulation device, which can not only achieve oil filtration, but also assist in temperature control and water removal process through oil circulation.

[0015] (2) The shield machine anti-condensation water constant temperature self-filtering oil tank of the present invention uses a humidity sensor to detect the water content in the oil tank and the water content in the upper part of the oil tank. When the water content reaches the warning value, the heating dehumidification function is activated, and the corrugated plate evaporates and the top plate collects distilled water to achieve the dehumidification effect.

[0016] (3) The shield machine anti-condensation water constant temperature self-filtering oil tank of the present invention adopts a double-layer structure, and the oil tank is used for indirect heating and cooling of the coiled pipeline to achieve constant oil temperature during operation and heating to remove water when the machine is stopped, so as to avoid oil emulsification.

[0017] (4) The shield machine anti-condensation water constant temperature self-filtering oil tank of the present invention addresses the problem of sedimentation inside the oil tank during use by using the oil tank's own oil filter pump to perform continuous internal small circulation, clean the system oil, and prevent impurities from entering the pump body, which would lead to systemic wear. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the shield machine anti-condensation water constant temperature self-filtering oil tank with its outer shell removed, as described in an embodiment of the present invention.

[0021] Figure 3 This is a cross-sectional view of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine according to an embodiment of the present invention;

[0022] Figure 4 The circuit diagram of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine described in this embodiment of the invention. Figure 1 ;

[0023] Figure 5 The circuit diagram of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine described in this embodiment of the invention. Figure 2 .

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Oil tank body; 11-Top plate; 12-Front side plate; 13-Rear side plate; 2-Tube heat exchanger; 3-Condensation guide plate; 31-Bottom end of guide plate; 4-Temperature sensor; 5-Humidity sensor; 6-Breathe; 7-Ambidextrous partition; 8-Control box; 9-Compression refrigeration equipment; 10-Filter device. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] The shield tunneling machine's anti-condensation water constant temperature self-filtering oil tank, such as... Figures 1 to 3As shown, the system includes an oil tank body 1, a tubular heat exchanger 2, a condenser guide plate 3, a temperature sensor 4, a humidity sensor 5, a breather 6, a sandwich partition 7, a control box 8, a compression refrigeration unit 9, and a filter device 10. The oil tank body 1 has a double-shell structure. The inner shell is used to hold the oil, and the oil tank body 1 is equipped with an oil filter. The condenser guide plate 3 is installed at an angle below the top plate 11 of the oil tank body 1. The tubular heat exchangers 2 are installed in the sandwich partitions on the front and rear sides of the oil tank body 1, and each tubular heat exchanger 2 is connected to the compression refrigeration unit 9 through a pipe. The bottom of the oil tank body 1 is used to drain condensate. The breather 6 is installed on the top of the oil tank body 1, and the control box 8, temperature sensor 4, and humidity sensor 5 are installed on one side. The internal pipes of the oil tank body 1 are connected to the external filter device 10. The tubular heat exchanger 2, temperature sensor 4, humidity sensor 5, compression refrigeration unit 9, and filter device 10 are all connected to the controller in the control box 8 to form an oil tank monitoring and control system. The oil tank body 1 is internally connected to an external circulating filter device 10 via pipelines to clean the oil and remove impurities. Its circulation function also assists in the oil temperature control and water removal process. The constant temperature oil tank of this application measures the oil temperature through a temperature sensor and uses a PID control method with a coiled tube heat exchanger for adjustment, which can quickly, accurately and stably control the oil temperature. When the water content in the oil is too high, the water can be evaporated by heating the oil. The corrugated condensation guide plate used in the oil tank can effectively realize the diffusion and collection of water, preventing condensate from falling back into the oil. The oil tank is connected to an external filter circulation device, which not only achieves oil filtration, but also assists in the temperature control and water removal process through oil circulation.

[0031] The compression refrigeration equipment 9 is a compressor, and its working principle is the same as that of an air conditioning compressor; the filter device 10 is a filter with dehumidification and temperature control functions. The controller in the control box 8 is a PLC, and any PLC capable of PID control can be used.

[0032] The bottom inner layer of the fuel tank body 1 is provided with a sandwich partition 7, which is used to drain condensate and prevent condensate from falling back into the fuel tank.

[0033] The tank body 1 is a rectangular shell structure with a top plate 11 on the top, a front side plate 12 and a rear side plate 13 on the front and rear sides respectively. A condensation guide plate 3 is provided below the top plate 11. The condensation guide plate 3 is installed at an angle between the front side plate 12 and the rear side plate 13, and the lower side of the condensation guide plate 3 is the bottom end 31 of the guide plate.

[0034] Preferably, the condenser guide plate 3 has a corrugated shape. Water in the oil evaporates through the condenser guide plate 3, and condenses into water droplets after encountering the top plate 11 of the oil tank. The water droplets accumulate and fall onto the condenser guide plate 3. Due to its corrugated shape and inclined placement, the water droplets collect at the bottom 31 of the guide plate and eventually fall into the oil tank interlayer partition 7, and are discharged from the interlayer partition 7, preventing condensate from falling back into the oil tank.

[0035] A tubular heat exchanger 2 is coiled between the layers of the front side plate 12 and the rear side plate 13. The tubular heat exchanger 2 is used to inject refrigerant, and the oil is indirectly heated or cooled by the heating or cooling of the refrigerant. A temperature sensor 4 is installed in the lower middle part of the side of the oil tank to measure the oil temperature. Any existing temperature sensor capable of measuring oil temperature is acceptable. A humidity sensor 5 is also installed in the lower middle part of the side to measure the water content in the oil. Any existing humidity sensor 5 capable of measuring the moisture content in the oil tank is acceptable.

[0036] Two breather valves 6 are installed on the top of the fuel tank body 1, and the bottom of the breather valves 6 is located above the condenser guide plate 3. The breather valves 6 can connect the inside of the shell to the outside atmosphere, while preventing external impurities from entering the fuel tank body 1. Preferably, the breather valves 6 are hollow tubes.

[0037] Figure 4 and Figure 5 Circuit diagram for the control process of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine:

[0038] The meanings of the letters in the circuit diagram are as follows:

[0039] S1 – Oil heating start / stop button; S2 – Oil temperature cooling start / stop button;

[0040] S3 – Filter cycle start / stop button; S4 – Temperature mode selection switch (automatic and manual modes); S5 – Dehumidification mode selection switch (automatic and manual modes);

[0041] B1 – Temperature sensor; B2 – Humidity sensor;

[0042] C1 – Temperature display; C2 – Humidity display;

[0043] A1 – Compression refrigeration equipment; A2 – Filtration device;

[0044] K1, K2, and K3 are all fuses;

[0045] The oil heating start / stop button S1, oil temperature cooling start / stop button S2, filter circulation start / stop button S3, temperature mode selection switch S4, dehumidification mode selection switch S5, temperature sensor B1, and humidity sensor B2 are all connected in parallel between the PLC and the positive terminal of the power supply; fuses K1, K2, K3, temperature detection display C1, and humidity detection display C2 are all installed in the control box 8 and are all connected in parallel between the PLC and the negative terminal of the power supply; two of the fuses (fuse K1 and fuse K2) are fuses for the compression refrigeration equipment A1, and one fuse (fuse K3) is fuse for the filter device A2, protecting the circuits of the compression refrigeration equipment A1 and the filter device A2 respectively.

[0046] The control process of the anti-condensation water constant temperature self-filtering oil tank of the tunnel boring machine is as follows:

[0047] Under normal circumstances, the oil temperature of the tunnel boring machine is cooled by a filter circulation pump through a plate cooler and an external water cooling system. During actual tunneling, if the oil temperature exceeds the set temperature, the oil tank will activate a secondary cooling cycle alarm, and the equipment's host computer will display an over-limit oil temperature display. In the event of an over-limit oil temperature, the constant-temperature oil tank can implement two control modes.

[0048] Cooling Mode 1: Manually switch the temperature mode selection switch S4 on the controller to manual mode. The PLC controls the tubular heat exchanger 2 to start the cooling function to cool the oil tank. When the temperature drops to a level that does not affect the equipment's tunneling, the host computer will remind the operator that the oil temperature in the tank meets the tunneling requirements. The operator can then manually stop the cooling or continue cooling.

[0049] Cooling Mode 2: Automatic Mode. When both the controller and the host computer are set to automatic detection mode, if the oil tank temperature exceeds the set value, the control system and temperature sensor 4 work together to adjust the oil temperature change in temperature control PID mode (specifically, temperature sensor 4 transmits the detected data to the controller in real time. When the controller determines that the temperature exceeds the set value, it controls the tubular heat exchanger 2 to cool down until the temperature reaches the set value, at which point the controller controls the tubular heat exchanger 2 to stop working).

[0050] When the tunnel boring machine is stopped, if the oil tank temperature is low, condensation is likely to occur inside the oil tank. In order to ensure a constant oil tank temperature, a heating mode is used to control the oil temperature.

[0051] Heating Mode 1: Manually switch the temperature mode selection switch S4 on the controller to manual mode. The PLC controls the tubular heat exchanger 2 to start the heating function, so that the oil tank is heated. When the temperature rises to the preset temperature, the controller will remind you that the temperature is qualified.

[0052] Heating Mode 2: Automatic Mode. When both the controller and the host computer are set to automatic detection mode, when the oil tank temperature drops to the set temperature, the control system works with the temperature sensor 4 to adjust the oil temperature change in temperature control PID mode (specifically, the temperature sensor 4 transmits the detected data to the controller in real time. When the controller determines that the temperature is lower than the set value, it controls the tubular heat exchanger 2 to heat up until the temperature reaches the set value, at which point the controller controls the tubular heat exchanger 2 to stop working). At the same time, the humidity sensor 5 detects the moisture content of the oil and works with the dehumidification function of the filter device 10 to dehumidify the oil tank.

[0053] Fuel tank filtration function:

[0054] If the control pump continues to malfunction when using oil, it is considered that impurities inside the oil have entered the control pump. At this time, the filter device 10 is turned on to filter the oil, clean the oil, and protect the pump body.

[0055] In addition, when the automatic mode of the temperature mode selection switch is turned on, the filter device 10 will be automatically turned on to circulate the oil in order to enhance the heating or cooling effect of the oil, so as to facilitate uniform heating or cooling.

[0056] Fuel tank dehumidification function:

[0057] When the tunnel boring machine (TBM) operates in strata with high moisture content, external moisture can easily enter the oil tank (tank body 1) through the breather, increasing the internal moisture content and causing oil emulsification. Additionally, when the TBM operates in a low-temperature environment, oil stratification and cooling water can easily form inside the oil tank when the machine is stopped. When the humidity sensor 5 in the oil tank detects excessive moisture content, an alarm is triggered on the host computer interface, and dehumidification can be performed via buttons on the control box 8.

[0058] Automatic Mode: When the automatic dehumidification selector switch is activated, the humidity sensor 5 transmits the detected data to the controller in real time. When the controller determines that the detected value is greater than the set value, it automatically activates the tubular heat exchanger 2 to heat the oil and the filter device 10 to accelerate the flow of oil and air in the tank. This promotes moisture evaporation through the condensation guide plate and discharges from the breather 6 on the top plate 11 of the tank. Alternatively, the water droplets condense on the top plate 11 and accumulate, falling onto the condensation guide plate 3. Due to its wavy shape and tilted placement, the water droplets collect at the bottom 31 of the guide plate and are discharged through the tank's interlayer partition 7, preventing condensate from falling back into the tank body 1. The controller then shuts off the tubular heat exchanger 2 and the filter device 10 when the detected value by the humidity sensor 5 is less than the set value.

[0059] Manual mode: Observe the humidity detection display on the upper part of the control box 8, and manually turn on the oil heating start / stop button S1 and the filter circulation start / stop button S3 as needed. Observe the detection value on the display. After the value meets the expected set value, stop heating.

[0060] The shield tunneling machine anti-condensation constant temperature self-filtering oil tank of this invention uses a humidity sensor to detect the water content inside the oil and at the top of the tank. When the water content reaches a warning value, a heating dehumidification function is activated. The dehumidification effect is achieved by evaporation through corrugated plates and collection of distilled water through the top plate. The oil tank adopts a double-layer structure with indirect heating and cooling through coiled pipes, maintaining a constant oil temperature during operation and allowing for water removal during shutdown to prevent oil emulsification. To address the issue of sedimentation inside the oil tank during use, a built-in oil filter pump continuously circulates the oil within the system, cleaning the system oil and preventing impurities from entering the pump and causing systemic wear.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A constant-temperature self-filtering oil tank for shield tunneling machines to prevent condensation, characterized in that: The system includes an oil tank body, which has a double-shell structure with an internal oil filter. A condenser guide plate is installed at an angle below the top plate of the oil tank body. Tubular heat exchangers are installed in the interlayer on both the front and rear sides. Each tubular heat exchanger is connected to a compression refrigeration unit via a pipe. A breather is installed on the top of the oil tank body. A control box, temperature sensor, and humidity sensor are installed on one side. The internal oil pipeline is connected to the filter device. The tubular heat exchangers, temperature sensor, humidity sensor, compression refrigeration unit, and filter device are all connected to the controller in the control box to form the oil tank monitoring and control system. A tubular heat exchanger is coiled between the layers of the front and rear side plates; The control box also includes an oil heating start / stop button S1, an oil temperature cooling start / stop button S2, a filter circulation start / stop button S3, a temperature mode selection switch S4, and a dehumidification mode selection switch S5, all connected in parallel between the PLC and the positive terminal of the power supply. Three fuses, a temperature detection display, and a humidity detection display are all installed in the control box and are all connected in parallel between the PLC and the negative terminal of the power supply. When the tunnel boring machine is stopped, if the oil tank temperature is low, condensation is likely to occur inside the oil tank. In order to ensure a constant oil tank temperature, a heating mode is used to control the oil temperature. Heating Mode 1: Manually switch the temperature mode selection switch S4 on the controller to manual mode. The PLC controls the tubular heat exchanger to start the heating function to raise the temperature of the oil tank. When the temperature rises to the preset temperature, the controller will remind you that the temperature is qualified. Heating Mode 2: Automatic Mode. When both the controller and the host computer are set to automatic detection mode, when the oil tank temperature drops to the set temperature, the temperature sensor transmits the detected data to the controller in real time. When the controller determines that the temperature is lower than the set value, it controls the tubular heat exchanger to heat up until the temperature reaches the set value. At the same time, the controller controls the tubular heat exchanger to stop working. Simultaneously, the humidity sensor detects the moisture content of the oil and works with the dehumidification function of the filter device to dehumidify the oil tank. The fuel tank dehumidification function includes: Automatic Mode: When the automatic dehumidification selection switch is turned on, the humidity sensor transmits the detected data to the controller in real time. When the controller determines that the detected value is greater than the set value, the controller controls the tubular heat exchanger to automatically turn on the heating oil and controls the filter device to automatically turn on, accelerating the flow of oil and air in the oil tank, promoting the evaporation of water through the condensation guide plate, and discharging it from the breather on the top plate of the oil tank, or condensing it into water droplets on the top plate of the oil tank. The water droplets accumulate and fall onto the condensation guide plate. Due to its wavy shape and tilted placement, the water droplets collect at the bottom of the guide plate and are discharged through the oil tank interlayer partition, preventing the condensate from falling back into the oil tank body. Until the humidity sensor detects a value less than the set value, the controller controls the tubular heat exchanger and filter device to turn off. Manual mode: Observe the humidity detection display on the control box, and manually turn on the oil heating start / stop button S1 and the filter circulation start / stop button S3 as needed. Observe the detection value on the display. After the value meets the expected set value, stop heating.

2. The condensation-proof constant-temperature self-filtering oil tank for a shield tunneling machine according to claim 1, characterized in that: The front and rear sides of the fuel tank body are respectively the front side plate and the rear side plate. A condensation guide plate is installed at an angle between the front side plate and the rear side plate, and the lower side of the condensation guide plate is the bottom end of the guide plate.

3. The constant temperature self-filtering oil tank for preventing condensation water of a tunneling machine according to claim 1, characterized in that: The condensing guide plate is in a wave shape.

4. The condensation-proof constant-temperature self-filtering oil tank for a shield tunneling machine according to claim 1, characterized in that: The inner layer of the bottom of the oil tank body is provided with a sandwich partition plate.

5. The constant temperature self-filtering oil tank for preventing condensation water of a tunneling machine according to claim 1, characterized in that: Two breathers are mounted on the top of the oil tank body, and the bottom of the breather is above the condensing guide plate.

6. The condensation-preventing constant-temperature self-filtering oil tank for a shield tunneling machine according to claim 1, characterized in that: The breather is a hollow pipe body.

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