JPH0727421Y2 - Pump device for non-segment shield method - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device for a non-segment shield construction method.

[0002]

2. Description of the Related Art Conventionally, in the shield tunnel method, when excavating a tunnel, a primary lining (segmenting) was performed while excavating, and a secondary lining (concrete erecting) was performed after the whole line was opened. . The segment is an iron or concrete formwork connected to and connected to the inside of the tunnel after excavation.

In this method, a pump for excavating soil during excavation is used, and a pump for concrete pressure feeding is used at the stage of secondary lining. Both pumps were never needed during the same period. However, in recent years, in order to shorten the construction period, a non-segment shield construction method has been developed, in which iron formwork is assembled in order from the place where the tunnel is excavated, and the segment is not adopted, but is directly fixed with concrete.

[0004]

[Problems to be Solved by the Invention] However, in the non-segment shield construction method, at least two pumps, one for pumping soil and one for pumping concrete, are arranged in the tunnel. And concrete pumping work will not be performed simultaneously in time. Therefore,
It is conceivable that one pump will be used for soil removal and concrete pumping. However, with one pump, the transportation pipe and the inside of the pump can be cleaned or piped every time the object to be pumped changes. It is necessary to re-do, and work efficiency deteriorates.

Therefore, it is necessary to have two pumps for soil discharge and concrete pumping. However, even if two pumps are installed, when one pump is operated, the other pump is in a non-operating state, Operation efficiency is poor. The present invention has been made to solve the above problems, and its purpose is to
It is an object of the present invention to provide a pump device for the non-segment shield construction method, which is capable of driving a pump for discharging soil and a pump for pumping concrete by a single power unit and also ensuring sufficient operation efficiency.

[0006]

The present invention has an electromagnetic switching valve provided in a hydraulic circuit and position detecting means for outputting a control signal to the electromagnetic switching valve, and is driven by pressure oil from the electromagnetic switching valve. Pump unit for soil discharge, an electromagnetic switching valve provided in a hydraulic circuit, and position detection means for outputting a control signal to the electromagnetic switching valve, and the pump unit for concrete is driven by pressure oil from the electromagnetic switching valve. And an electromagnetic switching valve for either one of the soil discharge pump unit and the concrete pump unit, and a changeover switch for enabling the position detection means, and either the soil discharge pump unit or the concrete pump unit. It has a pressure oil supply switching valve that is switched to one hydraulic circuit in synchronization with the changeover switch and supplies pressure oil to the pump unit side that is operable by the changeover switch. Characterized in that it includes a word unit.

[0007]

In the present invention, by switching the changeover switch of the power unit, the electromagnetic switching valve and the position detecting means of the soil discharge pump unit or the electromagnetic switching valve and the position detecting means of the concrete pump unit are activated. Become. By switching the pressure oil supply switching valve at the same time as switching of the changeover switch, pressure oil is supplied from the power unit to the pump unit side in the operable state by the changeover switch, and the soil discharge pump unit or the concrete pump unit is driven.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an earth pumping unit 2, a power unit 3, and a concrete pumping unit 4 are sequentially arranged in the tunnel 1 from the back.

FIG. 2 shows a hydraulic circuit diagram of the soil discharge pump unit 2, a hydraulic circuit diagram of the concrete pump unit 4, and a hydraulic circuit diagram of the power unit 3. Since the pump main body of the soil discharge pump unit 2 and the hydraulic circuit and the pump main body of the concrete pump unit 4 have the same structure and hydraulic circuit, the structure of the pump main body of the soil discharge pump unit 2 and the hydraulic circuit will be explained. The description of the structure of the pump main body of the pump unit 4 and the hydraulic circuit is omitted, and only the necessary parts will be described. Further, the constituent parts of the soil discharge pump unit 2 and the constituent parts of the concrete pump unit 4 are given the same numbers.

In the soil discharging pump unit 2 shown in the figure, 5 is a hopper for throwing in the soil, and 6 and 7 are a pair of soils for sucking and discharging the soil discharged concrete in the hopper 5 by pistons 6a, 7a. It is a concrete transfer cylinder. Reference numeral 8 denotes a rocking pipe as a flow path switching valve, which is provided in the hopper 5, one end 8a of which is connected to the transport pipe 9 and the other end 8b of which is a free end. It is rotated about its axis and is rocked so that the other end 8b is alternately communicated with the pair of excavated concrete transfer cylinders 6, 7. A swing cylinder 10 swings the swing tube 4.

Numerals 11 and 12 are a pair of hydraulic cylinders, and rods 11a and 12a thereof are connected to pistons 6a and 7a in a pair of earth and concrete transfer cylinders 6 and 7, respectively, and the pistons 6a and 7a are moved forward and backward. Retreat. One end side working chamber 11b of the pair of hydraulic cylinders 11, 12;
A main direction control valve consisting of an electromagnetic switching valve 15 is connected to 12b via a first conduit 13 and a second conduit 14, respectively. The other end working chambers of the hydraulic cylinders 11 and 12 communicate with each other through a pipe line 16. The electromagnetic switching valve 15 has a pair of solenoids SV (A) and SV (B). The solenoids SV (A) and SV (B) are operated by pilot pressure from a pilot pressure switching valve 23, which will be described later.

The swing cylinder 10 is connected to an electromagnetic switching valve 19 via a third pipe line 17 and a fourth pipe line 18, and the electromagnetic switching valve 19 has solenoids SV (C), SV.
It has (D). Solenoid SV (C), SV
(D) is operated by the pilot pressure from the pilot pressure switching valve 23 described later. In addition, the power unit 3 includes a main hydraulic pump 21, a pilot pressure pump 22, a pilot pressure switching valve 23, a pressure oil supply switching valve 24, and a return path switching valve 2 which are operated by an electric motor 20.
5, a cooler 26, a filter 27, and a hydraulic oil tank 28 that houses the filter 27 are provided.

One pressure oil supply port 23A of the pilot pressure switching valve 23 is connected to the electromagnetic switching valves 15 and 19 of the soil discharging pump unit 2 via the first pilot pipe 29A. The other pressure oil supply port 23B of the pilot pressure switching valve 23 is connected to the electromagnetic switching valves 15 and 19 of the concrete pump unit 3 via the second pilot pipe 29B.
Connected to. P port 2 of pilot pressure switching valve 23
3C is connected to the pilot pressure pump 22, and its T port 23D is connected to the hydraulic oil tank 28.

One of the pressure oil supply ports 24A of the pressure oil supply switching valve 24 is connected to the electromagnetic switching valve 15 of the soil discharge pump unit 2.
Connected to the P port 15C, and the other pressure oil supply port 24
B is an electromagnetic switching valve 1 of the concrete pump unit 4
5 is connected to the P port 15C. Pressure oil supply switching valve 2
4 P port 24C is connected to the main hydraulic pump 21,
The port 24D is connected to the hydraulic oil tank 28.

One return port 25 of the return path switching valve 25
A is connected to the T port 19D of the electromagnetic switching valve 19 of the soil discharge pump unit 2, and the other return port 25B is connected to the T port 19D of the electromagnetic switching valve 19 of the concrete pump unit 4. One discharge port 25C of the return path switching valve 25 is connected to the inside of the hydraulic oil tank 28 via the cooler 26 and the filter 27. The other discharge port 25D is connected to the inside of the hydraulic oil tank 28.

The T port 15D of the electromagnetic switching valve 15 in the soil discharge pump unit 2 is connected to the P of the electromagnetic switching valve 19.
It is connected to port 19C. Similarly, the T port 15D of the electromagnetic switching valve 15 in the concrete pump unit 4 is connected to the P port 19C of the electromagnetic switching valve 19. In the figure, LS (11) is the piston 11 a of the hydraulic cylinder 11 in the soil discharge pump unit 2.
LS (12) is the hydraulic cylinder 1
2 shows a position detecting means composed of a limit switch for detecting the stroke end of the forward movement of the second piston 12a. Further, LS (10A) is a position detecting means composed of a limit switch for detecting the stroke end of the forward movement of the piston of the swing cylinder 10, and LS (10B) is a limit switch for detecting the stroke end of the backward movement of the piston of the swing cylinder 10. The position detecting means consisting of is shown.

Also in the concrete pump unit 4, the reference numerals of the position detecting means are the same as the reference numerals of the soil discharging pump unit 2. FIG. 3 shows an electrical wiring diagram of the power unit 3. In the figure, one end of the operation switch 30 is connected to the power supply + side, and relays R1 (31) and R2 (3 are provided between the other end of the operation switch 30 and the power supply − side.
2), R3 (33) and R4 (34) are provided in parallel.

The C contact 31 of the relay R1 (31)
One ends of the A, c contact 31B, c contact 31C, and c contact 31D are connected to the control circuit 35, and the c contact 32A, c contact 32B, c contact 32C, and c contact 32D of the relay R2 (32).
Is connected to the control circuit 35, and further, the relay R3
(33) c contact 33A, c contact 33B, c contact 33C
Is connected to the control circuit 35.

The c-contact 34A of the relay R4 (34) is provided on the power source + side, and the pilot pressure switching valve 2 shown in FIG. 2 is provided between the a-contact part of the c-contact 34A and the power source-side.
3, solenoids 23a, 24a, 25a of the pressure oil supply switching valve 24, the return path switching valve 25, and the first pilot lamp 36 are provided. In addition, relay R4 (3
The second pilot lamp 37 is provided between the b contact portion of the c contact 34A of 4) and the power source-side.

FIG. 4 shows an electric wiring diagram of the soil discharge pump unit 2 and the concrete pump unit 4, and FIG.
The connection state with the power unit 3 will be described. First, the lead wires (a) and (b) connected to the respective ends of the solenoids SV (D) and SV (C) of the electromagnetic switching valve 19 provided in the soil discharge pump unit 2 are the relay R1 of FIG. (31)
Are connected to the a-contact part of the c-contact 31A and the a-contact part of the c-contact 31B. Further, the solenoids SV (B), SV of the electromagnetic switching valve 15 provided in the soil discharge pump unit 2
Lead wires (c) and (d) connected to each end of (a)
Are connected to the a contact portion of the c contact 31C and the a contact portion of the c contact 31D of the relay R1 (31) in FIG.

Solenoid SV (D) of electromagnetic switching valve 19,
SV (C) and solenoid SV of the electromagnetic switching valve 15
The lead wires (e) connected to the other ends of (B) and SV (A) are connected to the a contact portion of the c contact 32A of the relay R2 (32). Position detecting means LS (11), LS
The lead wire (h) connected to each end of (12) is
It is connected to the a-contact part of the c-contact 32D of the relay R2 (32). The lead wires (f) and (g) connected to the other ends of the position detecting means LS (11) and LS (12) are the a contact part of the c contact 32B and the c contact 32 of the relay R2 (32).
It is connected to the a contact portion of C.

Position detecting means LS (10A), LS (10
The lead wire (L) connected to each end of B) is connected to the a contact portion of the c contact 33C of the relay R3 (33). The lead wires (i) and (u) connected to the other ends of the position detecting means LS (10A) and LS (10B) are the a contact part of the c contact 33A of the relay R3 (33) and the c contact 33.
It is connected to the contact point a of B.

On the other hand, the solenoids SV (D), S of the electromagnetic switching valve 19 provided in the concrete pump unit 4
Lead wire (wo), (wa) connected to each end of V (C)
Is connected to the b contact portion of the c contact 31A and the b contact portion of the c contact 31B of the relay R1 (31) in FIG. Also,
2 is connected to one end of each of solenoids SV (B), SV (A) of the solenoid directional control valve 15 provided in the concrete pump unit 4, and the relay wire R shown in FIG.
1 (31) is connected to the b-contact part of the c-contact 31C and the b-contact part of the c-contact 31D.

Solenoid SV (D) of electromagnetic switching valve 19,
SV (C), solenoid SV (B) of solenoid operated directional control valve 15,
The lead wire (ta) connected to each other end of the SV (A) is connected to the b contact portion of the c contact 32A of the relay R2 (32). The lead wire (tsu) connected to one end of each of the position detecting means LS (11) and LS (12) is a relay R2 (3).
It is connected to the b contact part of the c contact 32D of 2). The lead wires (re) and (so) connected to the other ends of the position detecting means LS (11) and LS (12) are relays R2 (32).
Are connected to the b contact portion of the c contact 32B and the b contact portion of the c contact 32C.

Position detecting means LS (10A), LS (10
The lead wire (LA) connected to each end of B) is connected to the b contact portion of the c contact 33C of the relay R3 (33). The lead wires (ne) and (na) connected to the other ends of the position detecting means LS (10A) and LS (10B) are the b contact part and the c contact 33 of the c contact 33A of the relay R2 (33).
It is connected to the B contact point of B.

Next, the operation of this embodiment will be described. Figure 3,
In FIG. 4, when the operation switch 30 of the power unit 3 is in the off state, the relays R1, R2, R3, R4
Is demagnetized, and therefore, the c contact 31A of the relay R1,
Each of the a-contact portions of 31B, 31C, and 31D is off, and each of the b-contact portions thereof is on. The a-contact portions of the c-contacts 32A, 32B, 32C, and 32D of the relay R2 are off, and the b-contact portions thereof are on. Relay R
Each of the a-contact portions of the c-contacts 33A, 33B, and 33C of No. 3 is off, and each of the b-contact portions thereof is on.

As a result, the solenoids SV (A), SV of the electromagnetic switching valve 15 of the concrete pump unit 4 are
(B) and solenoids SV (C), S of the solenoid operated directional control valve 19.
V (D) and position detection means LS (11), LS (12)
And the position detecting means LS (10A), LS (10B) are in a standby state for operation. On the other hand, the pump unit 2 for soil discharge
Solenoid SV (A), SV (B) of the electromagnetic switching valve 15 of
And solenoids SV (C), SV of the solenoid operated directional control valve 19.
(D) and position detecting means LS (11), LS (12)
The position detecting means LS (10A) and LS (10B) are in a non-operating state.

Since the a contact portion of the c contact 34A of the relay R4 is off, the pilot pressure switching valve 2
3, the solenoids 23a, 24a, 25a of the pressure oil supply switching valve 24 and the return path switching valve 25 are demagnetized, and therefore,
The oil in the hydraulic circuit in the soil discharge pump unit 2 is in a state of returning to the hydraulic oil tank 28 via the pilot pressure switching valve 23, the pressure oil supply switching valve 24, and the return path switching valve 25. On the other hand, the solenoid switching valves 15 and 19 in the concrete pump unit 4 are supplied with pilot oil from the pilot pressure pump 22 via the pilot pressure switching valve 23, and from the main hydraulic pump 21 to the pressure oil supply switching valve. Two
The oil is supplied to the electromagnetic switching valve 15 via 4 and returns from the electromagnetic switching valve 19 to the hydraulic oil tank 28 via the return path switching valve 25.

In short, when the operation switch 30 of the power unit 3 is off, the soil discharge pump unit 2 is inactive and the concrete pump unit 4 is active. Further, when the operation switch 30 of the power unit 3 is switched and turned on, the relay R
1, R2, R3, R4 are excited, and the solenoids 23a, 24a, 25a of the pilot pressure switching valve 23, the pressure oil supply switching valve 24, and the return path switching valve 25 are excited. The solenoid SV of the solenoid operated directional control valve 15 of the soil discharge pump unit 2 is operated in the opposite manner to the off state.
(A), SV (B), solenoid SV of solenoid switching valve 19
(C), SV (D), position detecting means LS (11), LS
(12), LS (10A), and LS (10B) are in the operable state. At the same time, the solenoids of the pilot pressure switching valve 23, the pressure oil supply switching valve 24, and the return path switching valve 25 are also excited. As a result, the operation switch 3 of the power unit 3
When 0 is on, the soil discharge pump unit 2 is in an operable state and the concrete pump unit 4
Is inactive.

In this way, by switching the operation switch 30 of the power unit 3, the pilot pressure switching valve 23, the pressure oil supply switching valve 24, the return path switching valve 25 and the relays R1, R2, R3 and R4 can be switched simultaneously. Now, the power unit 3 is the electromagnetic switching valve 15 of the soil discharge pump unit 2 or the concrete pump unit 4.
Solenoid SV (A), SV (B), solenoid switching valve 19
Solenoids SV (C), SV (D), position detecting means L
S (11), LS (12), LS (10A), LS (1
0B).

According to the above construction, the non-segment shield construction method has a working condition that the earth discharging work and the concrete pumping work are not performed simultaneously in time. By utilizing this, one power unit 3 is used. Thus, the two pumps of the soil discharge pump unit 2 and the concrete pump 4 can be independently driven at different times.
As a result, one power unit 3 is sufficient for the two pumps of the soil discharge pump unit 2 and the concrete pump 4, and the power unit 3 can be constantly operated to improve the operation efficiency.

Since the soil discharging pump unit 2 is used for the soil discharging work and the concrete pump unit 4 is used for the concrete pumping work, the pump units 2 and 4 are independently used. Therefore, it is not necessary to clean the inside of the transport pipe or the pump or to re-install the pipe, and the work efficiency can be improved. In this embodiment, the position detecting means LS (10A), LS (10B) is used to switch the reciprocating operation of the swing cylinder 10.
Has been installed, but without these position detection means,
By adopting a sequence circuit which synchronizes with the operation of the position detecting means LS (11), LS (12) at an appropriate timing, the position detecting means LS (10A), LS (1
0B) can be eliminated.

[0033]

As described above, according to the present invention,
In the non-segment shield method, there is a working condition that the earth discharging work and the concrete pumping work are not performed at the same time, and by utilizing this, one power unit can be used for the earth discharging pump unit and the concrete pump. One pump can be driven. That is, one power unit is sufficient for the two pumps of the soil discharge pump unit and the concrete pump, and this can be constantly operated to improve the operation efficiency.

Since the soil discharging pump unit is used for the soil discharging work and the concrete pump unit is used for the concrete pumping work, each pump unit can be independently used for transportation. This eliminates the need for the work of cleaning the inside of the pipe or pump and re-installing the pipe, which has the effect of increasing the work efficiency.

[Brief description of drawings]

FIG. 1 is a side view of a power unit, a soil discharge pump unit, and a concrete pump unit arranged in a tunnel according to an embodiment of the present invention.

FIG. 2 is a hydraulic circuit diagram of the embodiment.

FIG. 3 is an electric wiring diagram on the power unit side of the embodiment.

FIG. 4 is an electrical wiring diagram on the soil discharge pump unit and concrete pump unit sides of the embodiment.

[Explanation of symbols]

2 Pumping unit for soil discharge 3 Power unit 4 Pump unit for concrete 24 Pressure oil supply switching valve 15, 19 Electromagnetic switching valve 31, 32, 33, 34 Relay LS (11), LS (12), LS (10A), LS
(10B) Position detecting means

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic switching valve provided in a hydraulic circuit, and position detection means for outputting a control signal to the electromagnetic switching valve,
The soil discharge pump unit driven by the pressure oil from the electromagnetic switching valve, the electromagnetic switching valve provided in the hydraulic circuit, and the position detection means for outputting a control signal to the electromagnetic switching valve are provided. A concrete pump unit driven by pressure oil, an electromagnetic switching valve of one of the soil discharge pump unit and the concrete pump unit, and a changeover switch for enabling the position detecting means to operate. And a power unit having a pressure oil supply switching valve that supplies pressure oil to the pump unit side that is operable by the changeover switch and is switched to a hydraulic circuit of either the unit or the concrete pump unit in synchronization with the changeover switch. The pump device for the non-segment shield method is characterized by