JP2007046368A - Trailing carriage for shield machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trailing carriage for a shield machine, which can greatly reduce an overall length even in the absence of a surplus space on an oil tank. <P>SOLUTION: This trailing carriage D for the shield machine is equipped with a hydraulic pump for driving various pieces 17, 18, 19 and 20 of hydraulic equipment of a shield machine body. The hydraulic pump is constituted as a multiple pump 7 in which a plurality of pump elements 12 are connected together so as to be driven by a common drive unit 9, and the plurality of pump elements 12 of the multiple pump 7 are connected to the pieces 17, 18, 19 and 20 of hydraulic equipment, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rear carriage of a shield machine that is disposed behind a shield machine main body and supplies hydraulic pressure to various hydraulic devices of the shield machine main body, and more particularly to a rear carriage of a shield machine that shortens the total length of the carriage. Is.

  As shown in FIG. 10, the shield machine S includes a shield machine main body 60 and a rear carriage 61 that supplies hydraulic pressure to various hydraulic devices of the shield machine main body 60. As shown in FIGS. 8 and 10, a general rear carriage 61 includes an operation carriage 63 having an operation panel 62 connected to a shield machine main body 60, and various hydraulic pressures of the shield machine main body 61 connected to the operation carriage 63. A first pump carriage 68 provided with hydraulic pumps 64, 65, 66, 67 for driving equipment, an oil tank carriage 69 connected to the first pump carriage 68 and provided with an oil tank 16, and a shield machine connected to the oil tank carriage 69. A second pump carriage 72 having a hydraulic pump 71 for driving the cutter 70 of the main body 60, and an activation panel 73 connected to the second pump carriage 72 and supplying power to the hydraulic pumps 64, 65, 66, 67, 71, etc. And a starting carriage 74 provided.

  By the way, as shown in FIG. 9, when the shield machine S is started from the start shaft T, the rear carriage 61 connects the various carriages 63, 68, 69, 72, 74 in a daisy chain as described above. Therefore, it is not arranged in the narrow start shaft T, but temporarily placed on the ground, and the hydraulic pressure is sent to the shield machine main body 60 side via the temporary hydraulic pipe 75 and the like.

  Then, as shown in FIG. 10, when the shield machine main body 60 starts temporarily with the rear carriage 61 left on the ground and forms an arrangement space for the rear carriage 61 behind it, the rear carriage 61 is placed in this arrangement space. It moves and is connected to the shield machine main body 60 to complete the shield machine S.

  For this reason, when there is not enough space on the ground such as in urban areas, it is difficult to secure a temporary storage space for the rear carriage 61. On the other hand, during temporary start, temporary hydraulic piping 75 and the like must be added in order to extend. However, there was a problem that the excavation speed could not be increased as in normal excavation.

  As an invention for improving such a problem, one described in Patent Document 1 is known. In the present invention, the pump unit is disposed on the oil tank, so that the sectional space of the rear carriage is effectively utilized, and the total length of the carriage is shortened. According to this, the temporary placement space for the rear carriage can be shortened, and the temporary start distance can be shortened.

JP-A-10-153088 JP 2001-329797 A JP 2001-329784 A Japanese Utility Model Publication No. 1-112701

  However, the effective use of the cross-sectional space shortens the total length of the carriage, and can only reduce the number of pump units that can be accommodated in the surplus space on the oil tank. The effect of reducing the temporary storage space of the bogie and the effect of reducing the temporary start length that reduces the excavation speed were insufficient.

  Accordingly, an object of the present invention is to solve the above-described problems and provide a rear carriage of a shield machine capable of significantly reducing the overall length even when there is no surplus space on the oil tank.

  In order to solve the above problems, the present invention provides a rear carriage of a shield machine having a hydraulic pump for driving various hydraulic devices of the shield machine main body, the hydraulic pump, and a plurality of pump elements with a common drive device. The multiple pumps are connected so as to be driven, and the pump elements of the multiple pumps are connected to the hydraulic devices.

  The multiple pump may be formed by connecting three or more pump elements, and these pump elements may be connected to three or more hydraulic devices.

  In addition, each type of hydraulic equipment consists of a main hydraulic equipment that is always driven from high speed to low speed excavation and a sub hydraulic equipment that is driven only during low speed excavation, and the maximum rated output of the drive unit that drives the multiple pump is The main hydraulic equipment is set to have the maximum output capacity at high speed excavation, and the sum of the ability to drive the main hydraulic equipment at the low speed excavation and the capacity to drive the sub hydraulic equipment at the maximum capacity It is preferable to set the above-mentioned ability when the maximum ability to drive is exceeded.

  The main hydraulic equipment includes a shield jack and a hydraulic motor that drives a screw conveyor, and the auxiliary hydraulic equipment includes a hydraulic cylinder that drives a copy cutter and a hydraulic on-off valve connected to the screw conveyor. A cutter hydraulic pump of a cutter motor may be provided in which the auxiliary hydraulic device is driven by the multiple pump and drives the cutter independently of the multiple pump.

  The main hydraulic equipment is composed of a shield jack and a hydraulic motor that drives an agitator, and the sub hydraulic equipment is composed of a hydraulic cylinder that drives a copy cutter, and a feed and discharge mud on / off valve that opens and closes a feed and discharge mud pipe. A main hydraulic device and a sub hydraulic device may be provided with a cutter hydraulic pump of a cutter motor that is driven by the multiple pump and drives the cutter independently of the multiple pump.

  Each pump element of the multiple pump is formed to have an equal discharge capacity, and a plurality of pump elements connected to the main hydraulic device may be combined in accordance with the capacity.

  The hydraulic piping from each pump element to the hydraulic equipment may be provided with means for returning the oil discharged from the pump element to the oil tank when the hydraulic equipment is inoperative.

  The pump element of the multiple pump may be provided soaked in an oil tank.

  According to the present invention, the total length of the carriage can be greatly shortened even if there is no surplus space on the oil tank.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Since the shield machine main body 60 and the start shaft T shown in FIGS. 9 and 10 are the same as described above, the same reference numerals are given and used below.

  FIG. 4 is a side view of the rear carriage of the shield machine. FIG. 1 is an enlarged side view of the main part of the rear carriage, specifically, a side view of the second carriage constituting the rear carriage.

  As shown in FIG. 4, the rear carriage D is configured by connecting the first carriage 1, the second carriage 2, the third carriage 3, and the fourth carriage 4 in order from the face side, and the shield excavation shown in FIG. 10. It is connected to the machine body 60.

  The first cart 1 is an operation cart having an operation panel 5. The operation panel 5 is for controlling various hydraulic devices of the shield machine main body 60.

  The second cart 2 is a pump cart including hydraulic pumps 6 and 7 that drive various hydraulic devices of the shield machine main body 60. As shown in FIGS. 1 and 2, the second carriage 2 includes a cutter hydraulic pump 6 of a cutter motor (not shown) that drives a cutter 70, and a first drive device that includes an electric motor and drives the cutter hydraulic pump 6. 8, a multiple pump 7 that drives other various hydraulic devices, and a second drive device 9 that includes an electric motor that drives the multiple pump 7. The cutter hydraulic pump 6 is formed so as to be able to always respond to a large output by being driven by a dedicated first driving device 8. A cutter hydraulic pipe 10 that connects the cutter hydraulic pump 6 and the cutter motor is provided with a cutter valve unit 11 for switching the rotation direction of the cutter motor and adjusting the rotation speed. The cutter valve unit 11 is electrically connected to the operation panel 5 and is operated by an operation from the operation panel 5.

  The multiple pump 7 is configured by connecting a plurality of pump elements 12 so as to be driven by a common drive device 9, and all the pump elements 12 are simultaneously driven by the second drive device 9. . The pump element 12 consists of a radial piston pump and is formed to have an equal discharge capacity. The multiple pump 7 has one suction port 13 and the same number of discharge ports 14 as the pump elements 12, distributes the oil sucked from the suction ports 13 by the plurality of pump elements 12, and each pump element The oil discharged from 12 is discharged from the discharge port 14 of each pump element 12.

  As shown in FIGS. 1 and 3, the multiple pump 7 has a suction port 13 connected to an oil tank 16 via a suction pipe 15, and a discharge port 14 connected to various hydraulic devices 17 of the shield machine main body 60, respectively. 18, 19, 20. The various hydraulic devices 17, 18, 19, and 20 include main hydraulic devices 17 and 18 that are always driven from high speed to low speed excavation, and sub hydraulic devices 19 and 20 that are driven only during low speed excavation. 17 and 18 and auxiliary hydraulic devices 19 and 20 are combined so that when one hydraulic device has the maximum output, the output of the other hydraulic device is reduced, and the maximum of the second drive device 9 that drives the multiple pump 7 is maximized. The rated output is made smaller than the sum of the maximum rated outputs of the hydraulic devices 17, 18, 19, 20. The maximum rated output of the second drive unit 9 that drives the multiple pump 7 is such that the main hydraulic devices 17 and 18 have the maximum output during high speed excavation, or the main hydraulic devices 17 and 18 are driven during low speed excavation. When the sum of the capacities at which the auxiliary hydraulic devices 19 and 20 are driven at the maximum capacity is equal to or greater than the maximum capability at which the main hydraulic devices 17 and 18 are driven, the sum is set. Specifically, the main hydraulic devices 17 and 18 include a shield jack 17 and a hydraulic motor 18 that drives a screw conveyor (not shown), and the auxiliary hydraulic devices 19 and 20 drive a copy cutter (not shown). The hydraulic cylinder 19 and the hydraulic on-off valve 20 for adjusting the amount of soil connected to the screw conveyor. A plurality of pump elements 12 connected to the main hydraulic devices 17 and 18 are combined in accordance with their capabilities.

  The multiple pump 7 also supplies hydraulic pressure to a copy system hydraulic pipe 21 that supplies hydraulic pressure to a hydraulic cylinder 19 of a copy cutter, a propulsion system hydraulic pipe 22 that supplies hydraulic pressure to a shield jack 17, and a hydraulic motor 18 of a screw conveyor. The screw system hydraulic piping 23 to be supplied and the gate system hydraulic piping 24 for supplying hydraulic pressure to the soil amount adjusting hydraulic on-off valve 20 connected to the screw conveyor are connected to each other.

  The copy system hydraulic piping 21 is provided with a copy switching valve 25 for switching the expansion, contraction or non-operation of the hydraulic cylinder 19 of the copy cutter. The switching valve 25 for copying is configured so as to block the hydraulic pipes 26 and 27 on the hydraulic cylinder 19 side by switching to the inoperative state, and to connect the hydraulic pipe 28 on the pump element 12 side to the return pipe 29. When the operation is switched to the inoperative state, the hydraulic cylinder 19 of the copy cutter is inoperable by fixing its length, and functions as a means for returning the oil discharged from the pump element 12 to the oil tank 16.

  The propulsion system hydraulic pipe 22 is provided with a propulsion switching valve 30 for switching the expansion, contraction, or non-operation of the shield jack 17. The switching valve 30 for propulsion is connected to the return piping 29 and the hydraulic piping 33 on the pump element 12 side to the return piping 29 as well as connecting the respective hydraulic piping 31 and 32 on the shield jack 17 side to the return piping 29 by being switched to non-operation. When the operation is switched to inoperative, the shield jack 17 is inactivated and functions as means for returning the oil discharged from the pump element 12 to the oil tank 16. Further, a propulsion on-off valve 34 is provided in the hydraulic pipe 31 on the extension side of each shield jack 17. The propulsion on / off valves 34 can be opened and closed independently, and the length of the optional shield jack 17 can be fixed by closing.

  The screw system hydraulic pipe 23 is provided with a screw switching valve 35 for switching between normal rotation, reverse rotation, and non-operation of the hydraulic motor 18. The screw switching valve 35 is switched to the inoperative state so that the hydraulic pipes 36 and 37 on the hydraulic motor 18 side are connected to the return pipe 29 and the hydraulic pipe 38 on the pump element 12 side is connected to the return pipe 29. When the operation is switched to inoperative, the hydraulic motor 18 of the screw conveyor is inactivated and functions as means for returning the oil discharged from the pump element 12 to the oil tank 16.

  The gate system hydraulic pipe 24 is provided with an on / off valve switching valve 39 for switching the opening / closing or non-operation of the soil volume adjusting hydraulic on / off valve 20. The switching valve 39 for the on-off valve closes the hydraulic pipes 40 and 41 on the soil volume adjusting hydraulic on-off valve 20 side by switching to the inoperative state, and connects the hydraulic pipe 42 on the pump element 12 side to the return pipe 29. When the operation is switched to the non-operating state, the soil amount adjusting hydraulic on-off valve 20 is inoperable by fixing its opening, and the oil discharged from the pump element 12 is returned to the oil tank 16. It is supposed to function. The soil pressure adjusting hydraulic on-off valve 20 is specifically composed of a screw gate.

  The third carriage 3 shown in FIG. 4 is an oil tank carriage provided with an oil tank 16, and the fourth carriage 4 is an activation carriage provided with an activation panel 43 that supplies electric power to a hydraulic pump or the like.

  Next, the operation of this embodiment will be described.

  When starting the shield machine S from the start shaft T shown in FIG. 9, the shield machine main body 60 is installed in the start shaft T, and the rear carriage D shown in FIG. The excavator main body 60 and the rear carriage D are connected by a temporary hydraulic pipe 75 or the like. As shown in FIGS. 1 and 3, the rear carriage D is configured to drive the various hydraulic devices 17, 18, 19, and 20 of the shield machine main body 60 with the plurality of pump elements 12 of the multiple pump 7. Since the plurality of pump elements 12 are driven by the common second driving device 9, the various hydraulic devices 17, 18, 19, and 20 are driven by different hydraulic pumps as compared with the case where each of them is driven by a separate hydraulic pump. The number can be reduced, the number of suction pipes connected to each hydraulic pump can be reduced, the number of start panels 43 for starting the hydraulic pumps can be reduced, and the total length of the carriage can be shortened. For this reason, a temporary storage space can be secured relatively easily.

  Thereafter, the operation panel 5 of the first cart 1 is operated to start the shield machine main body 60 from the start shaft T. Specifically, the cutter hydraulic pump 6 is driven to rotate the cutter motor, and the multiple pump 7 is driven to extend the shield jack 17 to drive the hydraulic motor 18 of the screw conveyor. At this time, all the pump elements 12 constituting the multiple pump 7 are driven at the same time, and the hydraulic pressure is also supplied to the hydraulic piping of the hydraulic equipment that is not used, but the switching valves 25, 30, 35, 39 are not activated. By switching to, the oil from the pump element 12 can be returned to the return pipe 29 and returned to the oil tank 16, and any hydraulic equipment 17, 18, 19, 20 can be easily deactivated and the multiple pump 7 It is possible to prevent an extra load from being applied to the second drive device 9 that drives the motor.

  As shown in FIG. 10, when the shield machine main body 60 is dug a predetermined distance, the rear carriage D shown in FIG. 4 is lowered into the start shaft T and connected to the shield machine main body 60. During the temporary start, the temporary hydraulic piping 75 and the like that connect the shield excavation main body 60 and the rear carriage D need to be sequentially added, so the speed is lower than the normal excavation speed. However, since the total length of the rear carriage D is shorter than before, the temporary start distance is short, and the reduction in efficiency due to the low temporary start speed can be reduced.

  In this way, the hydraulic pump is a multiple pump 7 in which a plurality of pump elements 12 are connected to be driven by a common second drive device 9, and each pump element 12 of the multiple pump 7 is connected to each hydraulic device 17, 18. , 19 and 20, the number of drive units and their startup panels can be reduced and the number of pipes connected to the pumps can be reduced compared to the case where a plurality of pumps are driven by separate drive units. Even if there is no surplus space on the oil tank 16, the total length of the rear carriage D can be shortened, a temporary storage space on the ground at the time of provisional start can be easily secured, and a reduction in efficiency during provisional start can be reduced.

  The various hydraulic devices 17, 18, 19, and 20 are composed of main hydraulic devices 17 and 18 that are always driven from high speed to low speed excavation, and sub hydraulic devices 19 and 20 that are driven only during low speed excavation. The maximum rated output of the second drive unit 9 that drives the pump 7 is set to the ability of the main hydraulic devices 17 and 18 to have a maximum output during high speed excavation, and the main hydraulic devices 17 and 18 are driven during low speed excavation. Since the sum of the capacity and the capacity at which the auxiliary hydraulic devices 19 and 20 are driven at the maximum capacity is equal to or greater than the maximum capacity at which the main hydraulic devices 17 and 18 are driven, the second capacity is set. 9 can be made smaller than the sum of the maximum capacities of the various hydraulic devices 17, 18, 19, 20, and the second drive device 9 can be made smaller. Thereby, the total length of the rear carriage D can be further shortened.

  The main hydraulic devices 17 and 18 include a shield jack 17 and a hydraulic motor 18 that drives a screw conveyor. The auxiliary hydraulic devices 19 and 20 include a hydraulic cylinder 19 that drives a copy cutter, and a hydraulic on-off valve 20 connected to the screw conveyor. The main hydraulic equipment 17, 18 and the sub hydraulic equipment 19, 20 are driven by the multiple pump 7, and a cutter hydraulic pump 6 of a cutter motor that drives the cutter independently of the multiple pump 7 is provided. Therefore, while securing the driving force necessary for the cutter, the hydraulic jack 18 for driving the shield jack 17, the hydraulic motor 18 for driving the screw conveyor, the hydraulic cylinder 19 for driving the copy cutter, and the soil pressure adjusting hydraulic on-off valve 20 ( The pump elements 12) can be made in multiples, and the total length of the rear carriage D can be shortened.

  Each pump element 12 of the multiple pump 7 is formed to have an equal discharge capacity, and a plurality of pump elements 12 connected to the main hydraulic devices 17 and 18 are combined in accordance with the capacity, so a relatively large flow rate is required. And the auxiliary hydraulic devices 19 and 20 having a smaller flow rate than the main hydraulic devices 17 and 18 can be easily combined and connected to the multiple pump 7.

  The hydraulic pipes 21, 22, 23, 24 extending from each pump element 12 to the hydraulic equipment 17, 18, 19, 20 are discharged from the pump element 12 when the hydraulic equipment 17, 18, 19, 20 is inoperative. Since the means (switching valves 25, 30, 35, 39) for returning the oil to the oil tank 16 is provided, any hydraulic equipment 17, 18, 19, 20 driven by the pump element 12 can be easily deactivated. At the same time, it is possible to prevent an excessive load from being applied to the second drive device 9 that drives the multiple pump 7.

  Next, another embodiment will be described.

  This embodiment is a combination of the second carriage 2 and the third carriage 3 of the above-described embodiment. The description of the same configuration as that described above is omitted, and the same reference numerals are given.

  As shown in FIG. 6, the rear carriage 50 is configured by sequentially connecting a first carriage 1, a second carriage 51, and a third carriage 4 (similar to the above-described fourth carriage 4) from the face side. As shown in FIG. 5, the second carriage 51 is a pump / oil tank carriage that includes the hydraulic pumps 6 and 7 that drive the above-described cutter motor and various hydraulic devices 17, 18, 19, and 20, and an oil tank 52. . Specifically, the second carriage 51 includes an oil tank 52, a cutter hydraulic pump 6 that is provided immersed in the oil tank 52, and a first drive device 8 that is provided outside the oil tank 52 and drives the cutter hydraulic pump 6. The multiple pump 7 provided by immersing the pump element 12 in the oil tank 52 and the second driving device 9 provided outside the oil tank 52 and collectively driving the pump elements 12 of the multiple pump 7 are provided. The cutter hydraulic pump 6 and the multiple pump 7 are configured to take in the oil in the oil tank 52 and supply hydraulic pressure to the cutter motor and other various hydraulic devices 17, 18, 19, 20.

  Thus, by providing the pump element 12 of the multiple pump 7 immersed in the oil tank 52, the total length of the carriage can be further shortened.

  Moreover, although the earth pressure type shield machine which discharges excavated soil with a screw conveyor was described, the shield machine may be a muddy water type shield machine which discharges soil with a sending and discharging mud pipe.

  Another embodiment when the shield machine is a muddy shield machine will be described. The description of the same configuration as described above is omitted, and the same reference numerals are given.

  As shown in FIG. 7, the main hydraulic devices 17 and 80 include a shield jack 17 and a hydraulic motor 80 for driving an agitator (not shown), and the auxiliary hydraulic devices 19, 81a and 81b are copy cutters (not shown). ) And a supply / discharge mud on / off valve 81a, 81b for opening / closing a mud pipe (not shown). The feed / drain mud on / off valves 81a and 81b include a mud feed side on / off valve 81a for opening / closing the mud feed pipe and an exhaust mud side on / off valve 81b for opening / closing the mud pipe. The mud supply side opening / closing valve 81a and the exhaust mud side opening / closing valve 81b are connected in parallel to the same hydraulic piping 89, 90, and are formed to always have the same opening degree.

  The multiple pump 7 includes a copy system hydraulic pipe 21 that supplies hydraulic pressure to the hydraulic cylinder 19 of the copy cutter, a propulsion system hydraulic pipe 22 that supplies hydraulic pressure to the shield jack 17, and an agitator that supplies hydraulic pressure to the hydraulic motor 80 of the agitator. The system hydraulic pipe 82 is connected to a supply / discharge mud on / off valve system hydraulic pipe 83 that supplies hydraulic pressure to the supply / discharge mud on / off valves 81a and 81b that open / close the mud pipe.

  The agitator system hydraulic piping 82 is provided with an agitator switching valve 84 for switching between rotation and non-operation of the hydraulic motor 80. The agitator switching valve 84 is connected to the hydraulic pipes 85 and 86 on the hydraulic motor 80 side to the return pipe 29 and is connected to the hydraulic pipe 87 on the pump element 12 side to the return pipe 29 by being switched to non-operation. When the operation is switched to inoperative, the hydraulic motor 80 of the agitator is inactivated and functions as means for returning the oil discharged from the pump element 12 to the oil tank 16.

  The feed / drain mud on / off valve system hydraulic pipe 83 is provided with a feed / drain mud on / off valve switching valve 88 for switching between opening, closing and non-operation of the feed / drain mud on / off valve 81. The switching valve 88 for the supply / discharge mud on / off valve closes the hydraulic pipes 89 and 90 on the side of the supply / discharge mud on / off valve 81 by switching to inactive, and connects the hydraulic pipe 91 on the pump element 12 side to the return pipe 29. When it is switched to non-operation, it functions as means for returning the oil discharged from the pump element 12 to the oil tank 16 while fixing the opening degree of the mud open / close valve 81 and inactivating it. It is supposed to be.

  As described above, the main hydraulic devices 17 and 80 include the shield jack 17 and the hydraulic motor 80 that drives the agitator, and the auxiliary hydraulic devices 19, 81 a, and 81 b include the hydraulic cylinder 19 that drives the copy cutter, and the supply / discharge mud pipe. The main hydraulic equipment 17, 80 and the auxiliary hydraulic equipment 19, 81 a, 81 b are driven by the multiple pump 7, and the cutter 70 is driven independently of the multiple pump 7. Even if the cutter hydraulic pump 6 of the cutter motor to be driven is provided, the shield jack 17, the hydraulic motor 80 that drives the agitator, the hydraulic cylinder 19 that drives the copy cutter, and the feed / exhaust while securing the driving force necessary for the cutter. The hydraulic pump (pump element 12) that drives the mud on / off valves 81a and 81b can be connected in multiples, and the total length of the rear carriage (not shown) is shortened. Door can be.

  The main hydraulic devices 17 and 80 are composed of the shield jack 17 and the hydraulic motor 80 that drives the agitator. However, if the soil is rich in fluidity, the agitator and the hydraulic motor 80 may be omitted. good. In this case, the multiple pump is preferably formed by connecting at least three pump elements. Each pump element 12 includes a shield jack 17, a hydraulic cylinder 19 for driving a copy cutter, and a supply / discharge mud opening / closing. It is good to be connected to the valves 81a and 81b through three systems of hydraulic piping 21, 22, and 83.

It is a principal part expanded side view of the back trolley | bogie of the shield machine which shows suitable embodiment of this invention. It is a top view of FIG. It is a hydraulic circuit diagram which connects the multiple pumps of a back trolley | bogie and the various hydraulic equipment of a shield machine main body. It is a side view of the back trolley | bogie of a shield machine. It is a principal part enlarged side view of the back trolley | bogie of the shield machine which shows other embodiment. It is a side view of the back trolley | bogie which concerns on FIG. It is a hydraulic circuit diagram which shows other embodiment. It is a side view of the back trolley | bogie of the conventional shield machine. It is side explanatory drawing of the shield machine which starts temporarily from the inside of a starting vertical shaft. It is side surface explanatory drawing of the shield machine which completed the temporary start.

Explanation of symbols

D Rear cart 6 Cutter hydraulic pump 7 Multiple pump 9 Second drive unit (drive unit)
12 Pump element 16 Oil tank 17 Shield jack (main hydraulic equipment, hydraulic equipment)
18 Hydraulic motor (main hydraulic equipment, hydraulic equipment)
19 Hydraulic cylinder (sub hydraulic equipment, hydraulic equipment)
20 Hydraulic on-off valve (sub hydraulic equipment, hydraulic equipment)
21 Copy system hydraulic piping (hydraulic piping)
22 Propulsion hydraulic piping (hydraulic piping)
23 Screw system hydraulic piping (hydraulic piping)
24 Gate system hydraulic piping (hydraulic piping)
25 Switching valve for copying (means)
30 Switching valve for propulsion (means)
35 Screw switching valve (means)
39 On-off valve switching valve (means)
52 Oil tank 60 Shield machine 80 Hydraulic motor (Main hydraulic equipment, Hydraulic equipment)
81a Mud-side opening / closing valve (sub hydraulic equipment, hydraulic equipment)
81b Mud-side open / close valve (sub hydraulic equipment, hydraulic equipment)

Claims (8)

  In the rear bogie of the shield machine equipped with a hydraulic pump that drives various hydraulic devices of the shield machine main body, the hydraulic pump is a multiple pump that is connected to drive a plurality of pump elements with a common drive device, A rear carriage of a shield machine, wherein each pump element of the multiple pump is connected to each hydraulic device.   2. The rear bogie of a shield machine according to claim 1, wherein the multiple pump is formed by connecting three or more pump elements, and these pump elements are connected to three or more hydraulic devices.   Each type of hydraulic equipment consists of a main hydraulic equipment that is always driven from high speed to low speed excavation and a sub hydraulic equipment that is driven only during low speed excavation. The maximum rated output of the drive unit that drives the multiple pump is The equipment is set to have the maximum output capability when drilling at high speed, and the sum of the ability to drive the main hydraulic equipment and the auxiliary hydraulic equipment to drive at maximum capacity when driving at low speed excavation drives the main hydraulic equipment. The rear bogie of the shield machine according to claim 1 or 2, wherein when the maximum capacity is exceeded, the above-mentioned capacity is set.   The main hydraulic equipment includes a shield jack and a hydraulic motor that drives a screw conveyor, and the auxiliary hydraulic equipment includes a hydraulic cylinder that drives a copy cutter and a hydraulic on-off valve connected to the screw conveyor. 4. The rear bogie of the shield machine according to claim 3, wherein a secondary hydraulic device is driven by the multiple pump, and a cutter hydraulic pump of a cutter motor that drives the cutter independently of the multiple pump is provided.   The main hydraulic device is composed of a hydraulic motor that drives a shield jack and an agitator, and the sub hydraulic device is composed of a hydraulic cylinder that drives a copy cutter, and a feed and discharge mud open / close valve that opens and closes a feed and discharge mud pipe. 4. The rear bogie of the shield machine according to claim 3, wherein a cutter hydraulic pump of a cutter motor is provided in which the device and the auxiliary hydraulic device are driven by the multiple pump and the cutter is driven independently of the multiple pump.   6. The shield machine according to claim 3, wherein each pump element of the multiple pump is formed to have an equal discharge capacity, and a plurality of pump elements connected to the main hydraulic device are combined in accordance with the capacity. Back trolley.   The shield piping machine according to any one of claims 1 to 6, wherein means for returning the oil discharged from the pump element to the oil tank when the hydraulic equipment is inoperative is provided in the hydraulic piping from each pump element to the hydraulic equipment. Back trolley. The rear cart of the shield machine according to any one of claims 1 to 7, wherein the pump element of the multiple pump is provided soaked in an oil tank.

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