Temperature control system for shield machine

Abstract

To provide a temperature control system of a shield machine capable of appropriately grasping temperature distribution in a chamber and suppressing temperature rise of the shield machine in the chamber.SOLUTION: This temperature control system for the shield machine 1 has a cutter head 2 provided at the front end in the excavating direction, a cylindrical body part 31 provided behind the cutter head 2, and a partition wall 4 formed on the cylindrical body part 31, and is provided with a plurality of temperature sensors 6, 6,... for measuring the temperature of excavated earth and sand taken into a chamber 3 provided along the rear surface of the partition wall 4 and surrounded by the cutter head 2, the cylindrical body part 31 and the partition wall 4.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a temperature management system for a shield tunneling machine. [Background technology]

[0002] In the shield tunneling method, the ground is excavated using a cutter head installed in front of the shield tunneling machine, and the excavation is carried out using thrust provided by existing segments formed behind the shield tunneling machine. The excavated soil cut by the cutter head is taken into a chamber, which is the space between the cutter head and a partition formed behind the cutter head, and then transported outside the tunnel by transportation means.

[0003] Shield tunneling machines are controlled by the measurements of numerous measuring devices installed inside. These measuring devices may malfunction if the shield tunneling machine becomes too hot. One of the factors that causes a shield tunneling machine to become too hot is the temperature of the excavated soil. For example, if the excavation speed is reduced when a shield tunneling machine is excavating gravel or rock, the excavated soil in the chamber may become too hot because it becomes difficult to replace it.

[0004] In order to prevent the temperature of a shield machine from rising, it is necessary to measure the temperature of the excavated soil and cool it by supplying cold water into the chamber before the temperature inside the chamber rises. For example, Patent Document 1 discloses a shield machine capable of measuring the temperature of the excavated soil, in which a temperature sensor is installed in the soil discharge system (screw conveyor, soil discharge pipe, etc.) that discharges the excavated soil from the chamber. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 05-263589 Summary of the Invention [Problem to be solved by the invention]

[0006] The temperature may vary depending on the location within the chamber. In addition, the shield tunneling machine of Patent Document 1 measures the temperature of the excavated soil discharged in a stirred state, so the temperature sensor reading may be lower than the area in the chamber where the temperature is rising, which may delay cooling within the chamber.

[0007] From this perspective, the present invention aims to propose a temperature control system for a shield tunneling machine that can properly grasp the temperature distribution within the chamber and suppress temperature increases within the chamber. [Means for solving the problem]

[0008] To solve the above problems, the present invention provides a temperature management system for a shield machine having a cutterhead provided at the front end in the excavation direction, a cylindrical section provided behind the cutterhead, and a partition formed on the cylindrical section, and the system is equipped with a plurality of temperature sensors installed along the rear surface of the partition. These temperature sensors measure the temperature of excavated soil and sand taken into a chamber formed by the space enclosed by the cutterhead, the cylindrical section, and the partition through the partition. The temperature sensors may be contact-type temperature sensors fixed to the partition, or non-contact temperature sensors installed at a distance from the rear surface of the partition.

[0009] This temperature management system for a shield machine uses multiple temperature sensors to measure the temperature transmitted from the excavated soil to the partition wall, allowing the temperature distribution in the partition wall to be monitored in real time. In other words, this invention allows the temperature status of the partition wall to be accurately monitored, allowing necessary measures to be taken early on regarding the excavated soil in the chamber, thereby suppressing temperature increases within the chamber. Furthermore, since the temperature sensor is installed outside the chamber and does not come into contact with the excavated soil, damage to the temperature sensor can be prevented.

[0010] If a display unit that displays the measurement results of the temperature sensors is provided, operators and workers can grasp the temperature status of the partition wall in real time. Furthermore, if a calculation unit that calculates the temperature distribution of the partition wall based on the measurement values ​​of the multiple temperature sensors is further provided, the temperature in areas where temperature sensors cannot be installed can also be grasped, thereby more effectively suppressing temperature increases. Furthermore, if a cooling water supply means is provided for supplying water to the chamber when the temperature of the excavated soil exceeds a threshold value, the temperature rise of the excavated soil can be automatically suppressed. [Effects of the Invention]

[0011] According to the temperature management system for a shield tunneling machine of the present invention, it is possible to properly grasp the temperature distribution within the chamber and suppress temperature increases in the shield tunneling machine. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing an overview of a shield tunneling machine according to an embodiment of the present invention. [Figure 2] This is a cross-sectional view of the partition wall as seen from the wellhead side. [Figure 3] FIG. 4 is a cross-sectional view showing the installation state of a temperature sensor. [Figure 4] FIG. 2 is an explanatory diagram showing an example of a display means. DETAILED DESCRIPTION OF THE INVENTION

[0013] Figure 1 shows an overview of a shield machine 1 of this embodiment. In the shield tunneling method, the shield machine 1 bores a hole in the ground G and forms a tunnel by installing a segment ring R in series behind the shield machine 1. The shield machine 1 excavates using thrust secured from the existing segment ring R formed behind the shield machine 1.

[0014] The shield tunneling machine 1 is controlled according to the measurement results of measuring instruments installed inside the shield tunneling machine 1. These measuring instruments may malfunction if they become too hot, so in this embodiment, a temperature control system is used to suppress temperature increases in the shield tunneling machine 1.

[0015] As shown in Figure 1, the shield tunneling machine 1 (temperature control system) comprises a cutter head 2 provided at the front end in the tunneling direction, a main body 3 having a cylindrical body (skin plate) 31 provided behind the cutter head 2, a partition 4 formed in front of the cylindrical body 31, a plurality of shield jacks 5, 5, ... provided at the rear of the main body 3, and a plurality of temperature sensors 6, 6, ... installed along the rear surface of the partition 4.

[0016] The cutter head 2 cuts the natural ground G by rotating with the power of the motor 21. The surplus soil (excavated earth and sand) generated by cutting with the cutter head 2 is taken into a chamber 32 consisting of a space surrounded by the cutter head 2, the cylindrical portion 31, and the partition wall 4.

[0017] The main body 3 is provided with a motor 21 that powers the cutter head 2, and a conveying means (screw conveyor, belt conveyor, etc.) 33 that discharges the excavated soil from the chamber 32. The excavated soil taken into the chamber 32 is transported outside the tunnel via the conveying means 33.

[0018] The thrust of the shield machine 1 is secured by extending the shield jacks 5 pressed against the segment rings R assembled at the rear of the main body 3. The shield jacks 5 are disposed on the inner surface of the cylindrical body 31 at the rear of the main body 3. The multiple shield jacks 5, 5, ... are arranged side by side in the circumferential direction of the cylindrical body 31.

[0019] The temperature sensor 6 measures the temperature of the excavated soil taken into the chamber 32 through the partition wall 4 made of a steel plate. FIG. 2 shows the arrangement of the temperature sensor 6. As shown in FIG. 2, the temperature sensor 6 is arranged at an arbitrary position and measures the temperature of the partition wall 4. The temperature sensor 6 of this embodiment is a non-contact temperature sensor installed at a distance from the rear surface of the partition wall 4. FIG. 3 shows the temperature sensor 6. As shown in FIG. 3, the temperature sensor 6 is attached via a jig 61. The jig 61 of this embodiment is fixed to a fixing means 62 via a bolt 63. The fixing means 62 is formed, for example, of a magnet and can be fixed to the cylindrical portion 31 or a rib (reinforcing plate) 41 erected on the rear surface of the partition wall 4. By fixing the fixing means 62, the temperature sensor 6 is installed in a predetermined position. Note that the method for fixing the temperature sensor 6 and the configurations of the jig 61 and the fixing means 62 are not limited.

[0020] The number and arrangement of the temperature sensors 6 are not limited, but in this embodiment, nine temperature sensors 6 are arranged (four on the outer periphery, four in the radially intermediate portion, and one near the center). When the partition wall 4 is divided into four regions (fan-shaped regions with a central angle of 90 degrees) at the top, bottom, left, and right, one of the four temperature sensors 6 on the outer periphery is arranged in each region. The same applies to the four temperature sensors 6 arranged in the radially intermediate portion of the partition wall 4. If necessary, heat transfer sheets are attached to the partition wall 4 at positions corresponding to the temperature sensors 6.

[0021] The measurement results of the temperature sensors 6 are displayed on a display unit 7 (see FIG. 4) such as a monitor or a mobile terminal installed in a location visible to an operator or in a control room, and are also transmitted to a computing unit (such as a personal computer) installed in the control room. FIG. 4 shows an example of the display unit 7. In this embodiment, the display unit 7 displays the temperature of the cutter head 2, the temperature of the cutter motor reducer, and the temperature of the partition wall 4. In FIG. 4, the temperatures at the "outer periphery top," "outer periphery right," "outer periphery bottom," and "outer periphery left" are measured by four temperature sensors 6 arranged on the outer periphery of the partition wall 4 in FIG. 2. In addition, in FIG. 4, the temperatures at the "inner periphery top," "inner periphery right," "inner periphery bottom," and "inner periphery left" are measured by four temperature sensors 6 arranged in the radial middle of the partition wall 4 in FIG. 2, and [RJ] is measured by a temperature sensor 6 arranged near the center of the partition wall 4 in FIG. 2.

[0022] The calculation unit calculates the temperature distribution of the partition wall 4 based on the measurement values ​​of the multiple temperature sensors 6, 6, .... The temperature distribution is calculated, for example, by linearly interpolating the temperatures measured by adjacent temperature sensors 6, 6. The temperature distribution calculated by the calculation unit is displayed on the display unit 7, for example, in the form of a contour diagram. The calculation unit also issues a signal when the temperature of the partition wall 4 exceeds a preset threshold. When the signal is issued, a warning is displayed on the display unit 7. The threshold is set to a temperature below which a malfunction may occur in the measuring instruments, etc., inside the main body 3. The display unit 7 may be configured to display a warning when the entire temperature of the partition wall 4 exceeds the threshold (when the measurement values ​​of all the temperature sensors 6 exceed the threshold), or when the temperature of only a portion of the partition wall 4 exceeds the threshold (i.e., when the measurement value of at least one temperature sensor 6 exceeds the threshold, or when the average measurement value of all the temperature sensors 6 exceeds the threshold).

[0023] When the temperature of the partition wall 4 (excavated earth and sand inside the chamber 32) exceeds a threshold value, water is supplied to the chamber 32 by a cooling water supply means (not shown) to cool the inside of the chamber 32 (excavated earth and sand). The cooling water supply means comprises, for example, a water supply tank installed behind the shield tunneling machine 1 and a water supply pipe running from the water supply tank to the chamber 32. The water supply tank may be cooled as necessary.

[0024] According to the temperature control system for the shield machine 1 of this embodiment, the temperature transmitted from the excavated earth to the partition wall 4 is measured by multiple temperature sensors 6, making it possible to grasp the temperature distribution in the partition wall 4 in real time. In other words, according to the temperature control system of this embodiment, the temperature status of the partition wall 4 can be accurately grasped, and therefore the temperature status inside the chamber 32 can be indirectly grasped, and by taking any necessary measures for the excavated earth inside the chamber 32 at an early stage, it is possible to suppress a rise in temperature in the partition wall 4. Furthermore, because the temperature sensor 6 is provided outside the chamber 32 and does not come into contact with the excavated earth, the temperature sensor 6 will not be damaged.

[0025] The measurement results of the temperature sensor 6 can be confirmed on the display unit 7, allowing the operator or worker to grasp the temperature status of the partition wall 4 in real time and to cool the inside of the chamber 32 at the appropriate timing. In addition, the temperature in areas where the temperature sensor 6 cannot be installed can be grasped from the temperature distribution calculated by the calculation unit, making it possible to effectively suppress temperature increases.

[0026] Furthermore, even if the temperature of the excavated soil exceeds the threshold value, the cooling water supply means can automatically suppress the temperature rise of the excavated soil. By checking the distribution of the temperature rise, it is possible to confirm that the temperature inside the chamber 32 is rising overall, and it is also possible to understand that the temperature is rising in parts due to frictional heat generated by gravel and other particles meshing together inside the chamber 32.

[0027] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and each of the above-described components can be appropriately modified within the scope of the present invention. In the above embodiment, water (cooling water) is supplied into the chamber 32 by the cooling water supply means, but the supply of cooling water may be performed manually while checking the display unit 7. The configuration of the cooling water supply means is not limited.

[0028] In the above embodiment, a non-contact type temperature sensor 6 is used and is installed at a distance from the partition wall 4, but a contact type temperature sensor 6 may also be used. In that case, the temperature sensor 6 is installed in contact with the partition wall 4. The temperature sensor 6 may also be a thermal camera. [Explanation of symbols]

[0029] 1. Shield tunneling machine 2 cutter heads 3 Main body 31 Cylindrical body (skin plate) 32 Chambers 33 Transportation 4 Bulkhead 5 Shield Jack 6 Temperature Sensor 61 Jig 62 Fixing means 63 volts 7 Display section

Claims

1. A temperature management system for a shield machine having a cutter head provided at the front end in the excavation direction, a cylindrical portion provided behind the cutter head, and a partition wall formed in the cylindrical portion, A temperature management system for a shield tunneling machine, characterized in that it is equipped with a plurality of temperature sensors installed along the rear surface of the partition wall and measuring the temperature of the excavated soil and sand taken into a chamber consisting of a space surrounded by the cutter head, the cylindrical portion, and the partition wall through the partition wall.

2. 2. The temperature management system for a shield machine according to claim 1, wherein the temperature sensor is a non-contact temperature sensor provided at a distance from the rear surface of the partition wall.

3. 2. The temperature management system for a shield machine according to claim 1, further comprising a display unit that displays the measurement results of the temperature sensor.

4. a calculation unit that calculates a temperature distribution of the partition wall based on measurement values ​​of the plurality of temperature sensors; 2. The temperature management system for a shield machine according to claim 1, further comprising a display unit that displays the temperature distribution.

5. 5. A temperature management system for a shield tunneling machine according to claim 1, further comprising a cooling water supply means for supplying water to the chamber when the temperature of the excavated soil exceeds a threshold value.

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