JPS61122398A - Pipe laying apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a management installation device for burying small-diameter pipes using a propulsion method, and particularly for small-diameter pipes that cannot be accessed by a person, for example, 800 fi or less. This is suitable for management and installation equipment that buries pipes.

[Background of the invention]

In recent years, the method of burying small-diameter pipes has changed from the cut-and-cover method of excavating the ground surface, to installing it in the starting shaft and connecting it to the main body of the excavator with a t-propulsion device to push the rear end of the buried pipe, and at the same time pushing it into the ground with an auger head. This is now being replaced by the propulsion method, which involves excavating the mountain and gradually pushing buried pipes into the ground. A general sequence of management equipment using the propulsion method is explained in Fig. 5). In the figure,
Reference numeral 1 denotes a casing that accommodates the excavator main body (hereinafter referred to as the main body), 2'U screw 1 shaft 5' that can rotate freely, and is supported by the main body 1 with a bearing 3', and also serves as a passage for the excavated earth and sand 15. There is. Screw shaft 5' is @5'! Shaft 51a
The screw blade 5'd is continuously fixed to a cutter head 5'c1 and a fence 5'a, on which a large number of bits 5pb are arranged. The screw shaft 5' is rotated by a drive device (not shown) installed in the starting shaft, excavates the ground 14, and forces and discharges the earth and sand 15 backward, but as the excavation progresses, , each length of the buried pipe 11 is connected with the casing 2' in the starting shaft.

Therefore, in this device, since the weight of the screw shaft 5' and the casing 2 increases, their deflection becomes large. The contact stress with the inner circumferential surface of the casing 2 increases, resulting in increased wear and power loss. If a part of the Mayu screw is filled with excavated soil and then the soil is discharged, there is a possibility that the excavated soil may stick to the screw and cause the screw to turn, so the soil is discharged while keeping the filling level 4 to about 30 to 50%. is normal. As a result, a problem has arisen in which stagnant water at the face or spring water flows out into the starting shaft through the gap in the Suf IJz-. On the other hand, since the screw @5' is connected within the casing 2', there is a drawback that the connection work is difficult and takes a long time because the work must be done in a pinched space. To solve these problems, the management equipment shown in Fig. 6 is a shield tunneling machine (patent application for
5-101731) and was proposed as a friend. In the figure, the same reference numerals as in FIG. 5 indicate the same thing or the same function. 2'' is a casing that rotatably accommodates the screw shaft 5', which is supported by the main body 1 with a bearing 3', forms a chamber for sucking earth and sand 15 at the back of the cutter head 5yC, and has a screw blade 5'd. It has a rear end wall near the terminal end, and a series of earth discharge pipes 12a and 12a are installed in the vicinity thereof.A plurality of direction correction jacks 4 are arranged on the outer periphery between the main body 1 and the casing 2'. The direction of the casing 2' along with the screw s5' is corrected along the path liJ by the expansion and contraction of the jack 4.The length of the screw blade 5'd of the screw shaft 5' is such that the length of the screw blade 5'd of the screw shaft 5' is such that the earth and sand 15 can be moved along the earth discharge pipe 12&.

12b, with a length as short as possible, sufficient to transport the
The length of the casing 2' also reduces its own weight accordingly. The screw shaft 5' protrudes from the rear end wall of the casing 2' and is located in the starting shaft (located in the companion drive unit ft (
(not shown) is connected to a rotating drive shaft 6. On the other hand, the earth removal pipe 12b is connected to the earth earth removal pipe 12m via an on-off valve 16 which is opened and closed by pneumatic pressure, and is also connected to the following earth removal pipe 12c via an on-off valve 16, so that the soil removal pipe 12b is connected to the earth removal pipe 12m through an on-off valve 16 which is opened and closed by air pressure. The drive shaft 6 and the earth discharge pipe 12a are connected to each other as the length of the pipe 11 increases.

An air supply port 17 is provided at the front end of the earth removal pipe 12b for supplying pressurized air for pumping the earth and sand 15 in the earth earth removal pipe 12b to the earth earth removal pipe 12c. A pressure detector 18 is provided to detect the earth pressure of the earth and sand 15. Further, the on-off valve 16 is configured such that the elastic valve body 16b opens and closes as pressure air is supplied and discharged from the air supply port 16a. In this configuration, soil removal is carried out when the front end on-off valve 16t is opened, and the back end on-off valve 16t is closed, and the rear end of the buried pipe 11 is excavated.At the beginning, the buried pipe is not connected, so the main body 1 rear end) and at the same time turn the screw shaft 5.
' Full rotation. The earth and sand 15 excavated by the cutter head 5'C is transferred by the screw blades 5'd through the inside of the casing 2' from the earth removal pipe 12a to the earth earth removal pipe 12b. As the excavation and transfer continued, the earth removal pipe 12
When the earth pressure in b is higher, a predetermined earth pressure is detected by the pressure detector 18. At this time, the open front valve 1
Pressurized air is sent to the air supply port 16 m of No. 6 to close the elastic valve body 16 b, and then the opening/closing valve 16 near the rear is opened, and pressurized air is sent from the air supply port 17 into the earth removal pipe 12 b. Then, the earth and sand 15 compacted into a cylindrical shape between the front and rear on-off valves 16
is forced into the earth discharge pipe 12a. By repeating this process, the earth and sand are removed, and the buried pipe 11 is removed from the ground 1.
4, and the burying of the pipe proceeds. However,
Although this device solves the above-mentioned problems, it uses pressurized air to remove soil, and the pressure becomes high the longer it is pumped, which puts all parts at risk, and quality control of the soil removal pipes and pressure air supply hoses. Needless to say, strict construction management of the connections is always required. Moreover, the limit for making the air pressure high (5 in a row)
K9/crl), which has the drawback that it is difficult to pump long distances, and in addition, the compacted cylindrical soil under high pressure is discharged into the atmosphere from the rear end of the earth discharge pipe, and the This created a new problem: explosion noise.

[Purpose of the invention]

An object of the present invention is to provide a management equipment that does not require strict quality control or construction management of earth discharge pipes, etc., enables long-distance pumping of earth and sand, and eliminates noise pollution.

[Summary of the invention]

In the management equipment of the present invention, a screw shaft having a cutter rod at the tip is rotatably housed in a casing with a slight gap on its outer periphery, and a gap is provided so that the direction of the casing can be corrected. The screw s +
Rotate r to compress the excavated soil backwards and connect the pipes in sequence.
In the management equipment for burying, a sand basin filled with excavated soil during earth removal is connected to the rear of the casing in the excavation model body, and the earth and sand in the sand basin is sucked by the back and forth movement of a piston. An earth and sand pump that does not use pressurized air is installed in parallel with the earth and sand basin to enable the long-distance movement of earth and sand, and the earth and sand that is forced by the earth and sand earth pump is discharged from the wall of the earth and sand basin. The present invention is characterized in that an opening is provided facing the earth and sand pump, and an earth discharge pipe is connected to the opening.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the figure, the same reference numerals as in FIGS. 5 and 6 indicate the same thing or the same function. 1 is the main body, 2
is a casing that rotatably accommodates a screw shaft, is supported by a main body 1 with four-sided bearings 3, and completely forms a chamber for sucking earth and sand 15 at the back of a cutter head 5C. At the rear of the casing 2, an earth and sand reservoir 10 is arranged in series, and consists of a cylindrical wall 10 m and a rear end wall 10 b having an opening 10 c.

Main body 1 and casing 2. An elastic body 9 that also serves as a sealing material is interposed between each of the casing 2 and the dirt reservoir 10, and a plurality of direction correction jacks 4 are extendable and retractable on the outer periphery of the main body 1 and the casing 2. It is arranged in a ceremony. The screw shaft 5 includes a cutter head 5c which is attached to the tip of the shaft 5a and has a pin 5b disposed thereon, a screw blade 5a, and a cutter head 5c which is attached to the tip of the shaft 5a, and which extends behind the shaft 5a.
It consists of a flexible shaft 5e with a diameter smaller than a. The screw blade 5d is the earth and sand in the chamber 1st-, the casing 2
The screw blades 5 are of a length as short as possible, sufficient to transport the sediment through the interior of the sediment basin 10 and fill it.
A gear 8 is attached near the terminal end of d, and meshes with a pinion 7 provided on a drive shaft 6 that rotates from the screw shaft 5t. The shaft end portion of the flexible shaft 5e is supported by the rear end wall 10b of the earth and sand reservoir 10. J is a sand pressure pump, which is installed in parallel with the cylinder wall 10 m of the earth and sand reservoir 10 and at a position opposite to the canister opening 10 c provided in the rear end wall 10 b.
An earth discharge pipe 12 is connected to the outer surface of the opening 10c to discharge the earth and sand that is pumped by the earth and sand pressure pump. Regarding the beauty of the earth and sand pump, a patent application was made in 1983.
Although it has already been disclosed in No. 162131, its configuration will be briefly explained. 21 is a function t-i of a hydraulic cylinder disposed in parallel with the earth and sand reservoir 10 in the main body 1;
The casing, n, is an outer cylinder that is movably fitted into the casing 21 and opens the openings 10a, 10a and 10a, which are opposite to each other, and about 1/2 of its total length is fitted into the casing 21. A stop flange 23t-1 is integrally attached to the inner periphery of the full-length one at the intermediate position, and a piston 24 that slides inside the casing 21 is integrally attached to the side end surface of the casing 21. A thin guide pipe δ is provided at the center of the piston, coaxially with the outer cylinder n, and protruding to the vicinity of the stopper B. With the open inner cylinder, stopper 2
3t - A piston 27 for pumping earth and sand is provided at the open end of the sandwiched outer cylinder B, and its outer periphery is attached to the outer cylinder n1 at the other end.
The inner circumferential guide tube and the sliding piston are both attached integrally, and the outer cylinder and the inner metal slide.

Next, we will explain the soil removal procedure in Fufu-Ren. When the screw shaft 5 rotates and the rear end of the excavator body 1 or the buried pipe 11 in contact with the excavator body 1 is propelled, the excavated soil 15 is taken into the chamber of the casing 2, and the screw The soil is transferred to the earth and sand reservoir 10 by the blade 5d. In this case, the earth and sand 15 is injected with gold such as a bentonite solution and heated to make it as easy to remove as possible through the earth removal pipe 12.

Since the earth and sand 15 in the earth and sand reservoir 10 is in a good pressure @ leaking state,
Activate the soil pressure pump to forcefully transport and remove soil.

Next, the operating status of the soil pressure pump is shown in Figures 2 to 4.
This will be explained using figures. FIG. 2 shows a state in which the piston of the outer cylinder B is on the bottom surface of the casing 21, and the piston of the inner cylinder is moved back toward the piston side of the outer cylinder. When pressure oil is supplied to the four sides of the boat provided on the bottom of the casing 21, the piston is pushed, and at the same time, the piston is pushed, and the outer cylinder n passes its open end through the dirt reservoir 10 and enters the opening 10.
c fc is pressed against the rear end wall 10 b surface so as to close it. In this process, the outer cylinder n is consolidated by 100 fLf? : Sediment 15 is sealed. Then, the inner cylinder and the outer cylinder n are pushed together, resulting in the state shown in FIG. During this time, the oil in the casing 21 is drained from the boat 30. pull i
(Continuing from boat 4) When pressure oil is supplied, the pressure oil passes through the communication hole 31'fc provided in the piston a, reaches the bottom of the outer cylinder O from the casing 21, and is transferred to the piston 28.
Press. When the piston/28 advances to its stopper 23, the piston n for pumping earth and sand at the tip also moves to the rear wall 10.
The earth and sand 15i sealed in the outer cylinder n are pushed out to the earth discharge pipe 12. During this time, the oil in the inner cylinder is discharged from the boat I through the boat 32, the guide pipe 5, and the passageway communicating with the guide pipe 5. This is the state shown in FIG. When the hydraulic switching valve (not shown) is operated from the state shown in Fig. 4 and pressure oil is supplied from the port, the pressure oil enters between the passages, the guide Vδtm and into the inner cylinder, pushing the piston path. outer cylinder n
It is moved backward to the position of the piston U, resulting in the state shown in Fig. 3. The pressure oil in the inner cylinder also flows into the outer cylinder 22F3 from the boat 32, and when the pressure oil is continuously supplied, the piston is pushed and the bottom 1fl of the casing 21 is pushed.
It is moved backward at i, and the sand 15 is sucked into the opening of the outer cylinder ρ, returning to the state shown in FIG. By this operation, the earth and sand 15 in the earth and sand layer 10 is forced into and discharged from the opening 10c to the earth removal pipe 12. In this example,
The properties of the earth and sand to be sucked and pumped by the earth and sand pressure pump should be fluid with a slump value of about 15, and the pressure of the earth and sand by the piston n during pumping should be about 20 KP-f/7. Experiments have confirmed that long-distance pumping is possible. In the nine main implementation series, due to the suction and pressure feeding of the earth and sand 15 by the application of the earth and sand pump, fluctuations in earth pressure occur in the area where the earth and sand pump is applied, and depending on the properties of the earth and sand 15, the fluctuations also extend to the face. However, since the earth and sand reservoir 10 is connected to the rear of the casing 2 in parallel with the earth and sand pump, fluctuations in the earth pressure are absorbed and alleviated within the earth and sand reservoir 10, and of course the influence on the face is reduced. The influence on the inside of the casing 2 is also a negligible value.

〔Effect of the invention〕

As explained above, the present invention has a sand basin connected to the rear of the casing in the excavation machine body, which is filled with excavated earth and sand during excavation, and the earth and sand in the sand basin are sucked and removed by the back and forth movement of the piston. An earth and sand pump for force-feeding is installed in parallel with the earth and sand reservoir, and an opening for discharging the earth and sand forced to be pumped by the earth and sand reservoir is provided in the wall of the earth and sand, facing the earth and sand pump, Since the soil discharge pipe is configured to be connected to the opening, construction management is easy, earth and sand can be pumped over long distances, and no explosive noise is generated because pressure air is not mixed into the soil discharge pipe. Nor. In addition, the earth and sand that fills the earth and sand pits and drainage pipes prevents water from stagnating in the ground or flowing out from springs, so it can be propelled even in water-retaining layers, and the screw shaft can be connected. Since it does not exist inside buried pipes, it has remarkable effects such as facilitating management surveying.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the management equipment of the present invention;
Figure 2 is a detailed cross-sectional view of the earth and sand pump in Figure 1, showing the pump in good condition after suctioning earth and sand, and Figure 3 shows the pump progressing from the state shown in Figure 2 to an intermediate stage of pumping earth and sand. Figure 4 is a diagram showing the original state after the pumping of earth and sand has been completed from the state shown in Figure 3, Figure 5 is a sectional view of a conventional management equipment with screw shafts, and Figure 6 is a diagram showing the original state. The reason is the special application of 1977-1.
It is a sectional view of a shield excavator proposed as No. 01731. 1... Excavator main body, 2.2', 2'... Casing, 5゜5', 5'... Screw shaft, 10...
Sediment pool, 11... Buried pipe, 12, 12 a, 1
2 b, 12 c = earth discharge pipe, 15... earth and sand, 16... opening/closing valve, addition... earth and sand pressure pump, 21.
...Casing, n...Outer cylinder, 26...Inner cylinder, 24, 27° section...Piston, 4, 3
0, 32...Boat.

Claims (1)

[Claims] A screw shaft having a cutter head at the tip is rotatably housed in a casing with a small gap around its outer periphery, and the casing is attached to the excavator body coaxially with the main body with a gap so that the direction of the casing can be adjusted. The machine is supported above and propels the main body of the excavator or the rear end of the buried pipe connected to the main body of the excavator, and the screw shaft is rotated to force the excavated earth and sand backward, and the pipes are sequentially connected and buried. In the management equipment, an earth and sand basin filled with excavated soil during excavation is connected to the rear of the casing in the excavator main body, and earth and sand in the earth and sand basin is sucked and pumped by the back and forth movement of a piston. A pressure pump is installed in parallel with the earth and sand reservoir, and an opening for discharging the earth and sand pumped by the earth and sand reservoir is provided in the wall of the earth and sand reservoir, facing the earth and sand pump, and a A management installation device characterized in that it is configured to be connected to an earth discharge pipe.