JP3930193B2 - Vertical shaft bypass device - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a shaft bypass device that is applied to a muddy water propulsion device or the like that presses and pushes underground pipes such as envied pipes and fume pipes from a starting vertical shaft to a reaching vertical shaft while refluxing muddy water.
[0002]
[Prior art]
As shown in FIG. 129, the conventional mud pressure pressurizing small-diameter pipe propulsion device 701 includes a base 705 installed on the bottom surface 704 a of the start shaft 704, a hydraulic main pushing device 706 fixed on the base 705, A hydraulic unit 708 (not shown) installed on the ground to drive the pushing device 706, a simple muddy water treatment apparatus installed on the ground, employing muddy water as a working fluid, pressurizing the muddy water, and circulating the muddy water 709, a shaft bypass device 713 for bypassing muddy water, a central operation panel 710 for controlling a muddy water pressurization state, and the like. A mud feed pump 711 is installed at the outlet of the simple mud treatment apparatus 709, and mud can be supplied from the mud feed pipe 712 to the excavator main body 804 via a shaft bypass device 713. This shaft bypass device 713 is propelled because once the simple muddy water treatment device 709 is stopped at the time of additional connection of a propulsion pipe (not shown), it takes time for the muddy mud to settle and muddy water to stabilize again. This is to maintain the flow rate even when additional pipes are connected. On the other hand, the earth and mud excavated by the excavator main body 804 are discharged to the simple mud treatment apparatus 709 via a connecting body (not shown), the mud pipe 715, the shaft bypass device 713, the mud pump 716, and the like. Can be refluxed. This shaft bypass device 713 is a device that changes the flow of mud sent from the ground simple mud treatment device 709, and reverses the flow of mud and waste mud in pipes such as the mud pipe 712 and the mud pipe 715. Or, the muddy water can be returned to the simple muddy water treatment device 709 from the shaft bypass device 713 without returning the muddy water to the excavator main body 804.
[0003]
This shaft bypass device 713 is composed of four manual valves 751, 752, 753, and 754, and is a ball valve with a valve in the lever direction. The manual valve 751 is connected to the mud feeding pipe 712 and the T-shaped pipe 772. The manual valve 752 is connected to the T-shaped pipe 772 and the T-shaped pipe 773, the manual valve 753 is connected to the T-shaped pipe 772 and the mud feeding pipe 732, and the manual valve 754 is connected to the T-shaped pipe 773 and the mud pipe. 735. Further, the mud pump 711 is connected to the simple mud treatment apparatus 709 and the mud pipe 712, and the mud pump 716 is connected to the mud pipe 715 and the T-shaped pipe 773. When returning the muddy water to the excavator main body 804, the manual valve 751 is opened, the manual valve 752 is closed, the manual valve 753 is opened, and the manual valve 754 is opened. On the other hand, when the shaft bypass device 713 immediately returns to the simple muddy water treatment device 709, the manual valve 751 is opened, the manual valve 752 is opened, the manual valve 753 is closed, and the manual valve 754 is closed. Therefore, the mutual switching of the three valves requires the opening and closing operation of the three valves six times, and the valve operation is also required for initial installation and removal.
[0004]
As described above, in the above-described conventional technology, the shaft bypass device 713 includes four manual valves 751 to 754 and the like, and the switching operation of the manual valves 751 to 754 must be performed six times for one propulsion. When connecting 50 propulsion pipes, the operation must be performed 300 times or more, and the operation is complicated and there is a possibility that troubles due to operation mistakes are likely to occur. there were. Further, the structure of the shaft bypass device 713 is complicated, and space is taken in the start shaft 704, and there is a possibility that the shaft bypass device 713 takes up space in construction in a small shaft.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a shaft bypass device capable of simplifying the structure of the shaft bypass device and improving the propulsion work efficiency.
[0006]
[Means for Solving the Problems]
In view of the above problems, the invention according to claim 1 Mud pipe is connected Mud Hole When, The drainage pipe is connected Mud Hole And , A pair on each side of the excavator body and muddy water treatment equipment Provided, and, The mud Hole And mud Hole Communicate with One Provide a chamber With a block The Block In the chamber One valve body Can be freely rotated Arranged in And The valve body But Mud is fed at the rotation position that divides the chamber. Mud A hole and one of the compartments Let the machine go through ~ side While supplying to , Main body ~ side Including soil excavated by Mud Draining water The hole and the other chamber Let it pass Mud Water treatment equipment On the side Can be discharged or said Mud is fed from a mud hole on the mud treatment device side at a pivot position different from the pivot position of the valve body. Muddy water The one valve body does not pass to the excavator main body side, but from the mud hole on the muddy water treatment device side. Muddy water treatment equipment On the side Can be bypassed And a muddy water bypass block The shaft bypass device is characterized by this.
Thereby, a bypass structure can be simplified and propulsion work efficiency improves.
The present invention can be applied to any one of the one-step mud pressurizing method and the two-step mud pressurizing method.
[0007]
Further, the shaft bypass device of the present invention is preferably applied to construction of buried pipes having a relatively small diameter, such as gas pipes and underground electric wire pipes, in addition to sewerage, but in addition, underground buried having an arbitrary purpose and diameter. It can be used for pipe construction.
[0008]
In view of the above problems, the invention described in claim 2 is a subordinate concept invention of claim 1, and is configured to communicate with the muddy water bypass block, a chamber formed in the center of the muddy water bypass block, and the chamber. Passing through the mud water bypass block in the front-rear direction, a mud feed hole provided with a connection port to which a mud feed pipe is connected, communicated with the chamber, and arranged side by side with the mud feed hole The mud water can pass through the mud water bypass block at a parallel position parallel to the axial direction of the mud water bypass block, and the mud water hole having a connection port through which the mud water pipe is connected through the mud water bypass block. A valve element disposed in the chamber so as to be able to alternately turn to the orthogonal position or the parallel position so that mud can be bypassed at an orthogonal position orthogonal to the direction, and perpendicular to the axial direction. A rotating shaft that is rotatably disposed at a central portion of the muddy water bypass block and is provided on the valve body, and a rotating portion that can rotate the rotating shaft. This is a shaft bypass device. Thereby, the subject similar to claim 1 can be solved. Both manual and automatic are possible.
[0009]
According to a third aspect of the present invention, a first fitting surface capable of fitting with the valve body is provided at a parallel end of the chamber at the parallel position of the valve body. 3. The shaft bypass device according to claim 1, wherein a second fitting surface that can be fitted to the valve body is provided at an orthogonal direction end of the chamber at the orthogonal position. Is. Thus, the same problem as that of the invention of claim 1 can be solved, and inconvenience due to leakage of muddy water can be prevented when the muddy water passes or is bypassed.
[0010]
According to a fourth aspect of the present invention, the rotating portion includes a hydraulic cylinder disposed in the axial direction near the muddy water bypass block, a lever having one end fixed to the rotating shaft, The other end and the piston rod of the hydraulic cylinder are connected to each other to convert the reciprocating motion of the piston rod of the hydraulic cylinder into the rotational motion of the valve body, and the piston rod is guided while being held linearly. The actuator is provided with a guide holding member. 2 The shaft bypass device described in 1. is used. This makes the claim 2 The same problems as those of the described invention can be solved, and a stable and powerful valve body can be driven.
[0011]
Further, various structures can be adopted as the main body structure of the shaft bypass device, but typically, as in the invention of claim 5, the muddy water bypass block is formed by joining halves. The shaft bypass device according to any one of claims 1 to 4 can be provided.
[0012]
The invention according to claim 6 is the shaft bypass device according to any one of claims 1 to 4, wherein the muddy water bypass block is an integral type.
[0013]
Further, according to the seventh aspect of the present invention, the muddy water is provided by interposing a mud feed pump provided in the mud pipe on the outlet side of the muddy water bypass block and a mud pump provided on the outlet side of the muddy water bypass block. The shaft bypass device according to any one of claims 1 to 6, wherein the shaft bypass device is connected to a processing device. Thus, the same problem as that of the first aspect of the invention can be solved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The shaft bypass device 1 which is 1st Embodiment of this invention is demonstrated with reference to FIG. As shown in FIGS. 1 to 4, the block type shaft bypass device 1 is parallel to the rectangular mud water bypass block 3 in which the chamber 2 (see FIG. 2) is provided, and to the axial direction (feeding / draining mud direction). By being in the parallel position, mud water can be recirculated (Fig. 4, Fig. 4). 26 (See Fig.) So that the muddy water can be bypassed by being in an orthogonal position orthogonal to the axial direction (Fig. 25 See FIG. 4), a plate-like valve body 5 (see FIG. 4) standing upright inside the chamber 2 so as to be able to rotate 90 degrees alternately at the orthogonal position or the parallel position, and a direction perpendicular to the axial direction of the muddy water bypass block 3 , A rotary shaft 6 fixed through the central portion of the valve body 5 so as to be rotatable in the muddy water bypass block 3, a lever 7 fixed to the rotary shaft 6, and the lever -7 and a hydraulic cylinder 8 (see FIG. 25 The figure 26 Reference) and stoppers 9a and 9b that restrict the rotational movement of the lever 7 and realize the accurate rotation of the valve body 5. Since the muddy water can be bypassed by the single valve body 5, the structure is simplified and the size is reduced. In use, it is sealed and can be protected from external pressure.
[0015]
The muddy water bypass block 3 sends muddy water to the excavator main body 4 and discharges the muddy water and earth and sand excavated (hereinafter referred to as a passing state), or prevents the passing state and bypasses to the simple muddy water treatment device 309. The gate functions as a gate that can be switched alternatively or alternatively (hereinafter referred to as a bypass state). The passing state is necessary for supplying muddy water to the cutting blade surface accompanying the propulsion of the propelling pipe 303 and discharging muddy water and earth and sand from the cutting blade surface, and the bypass state is the addition of the propelling pipe 303 and the like. Necessary to enable connection work.
[0016]
As shown in FIG. 4, the muddy water bypass block 3 is obtained by combining the upper body 30 and the lower body 40 which are divided bodies (half-split bodies) with bolts 20 a to 20 h and positioning pins 21 a and 21 b (see FIG. 2). . As shown in FIGS. 5 (a), 5 (b) to 7, the upper main body 30 has a round shaft hole 31 in the upper center portion, a semicircular mud feed hole 32 in the rear surface portion, and a semicircular cross section drain. A mud hole 33 is arranged in parallel, and a semi-circular feed hole 34 and a semi-circular discharge mud hole 35 are formed in the front part facing each other. The mud feed hole 32 or the exhaust mud hole 35 is formed in the central part. A circular chamber 2 as viewed from above is provided with an R on the upper peripheral surface that communicates with the upper surface. Thereby, the mud hole 32 or the mud hole 35 can communicate with each other. Ports 32b to 35b (see FIG. 6) having a semicircular cross section are formed in a portion communicating with the outside of the mud feed hole 32 or the mud discharge hole 35, and packing grooves 32a to 35a are respectively provided around the packing holes 22 to 25 (see FIG. 6). 1 and FIG. 2) can be mounted, the mud pipe 312 and the mud pipe 315 on the inlet side, and the mud pipe 332 and the mud pipe 335 which are elbow steel pipes on the outlet side (see FIG. 25 and FIG. 26). Each can be installed. These mounting end portions can be appropriately connected by welding so as not to leak water. The ends of the mud feed pipe 312 and the mud discharge pipe 315 are elbow steel pipes.
[0017]
The above-described mud feeding pipe 332 and the mud discharging pipe 335 are provided with ball valves 352 and 353 at the tip opposite to the insertion end, and are provided with the Victorian joint collars 354 and 355, respectively. The mud feed pipe 332 and the mud discharge pipe 335 are respectively connected to the mud feed pipe 342 and the mud discharge pipe 345 (see FIG. 27) by a Victorian joint. These configurations are not relevant during construction (during propulsion), but are intended to prevent muddy water from leaking when the pipe is removed. Further, the mud discharge pipe 335 includes a ball valve 358 on the upper side (downstream side) of the ball valve 353. This is because the ball valve 358 is opened to remove air and then removed.
[0018]
As shown in FIG. 6, the mud feed hole 32 and the exhaust mud hole 33 are separated by the rear partition wall 36, and the mud feed hole 34 and the exhaust mud hole 35 are separated by the front partition wall 37. The rear partition wall 36 has a fitting surface 36a that faces the chamber 2 and can be fitted to the valve body 5 (see the right curve surface 54 in FIG. 11). Similarly, the front partition wall 37 faces the chamber 2. The valve body 5 is provided with a fitting surface 37a (see FIG. 4) that can be fitted with the valve body 5 (see the left curved surface 53 in FIG. 11). The right side wall 26 and the left side wall 27 are provided in the direction orthogonal to the fitting surface 36a and the fitting surface 37a, and the fitting surfaces 26a and 27a are provided inside the respective center portions. These fitting surfaces 26 a and 27 a are also adapted to be fitted with the valve body 5. This is to prevent leakage of muddy water in the passing state and the bypass state.
[0019]
Further, as shown in FIG. 6, female screw holes 38 a to 38 c for attaching the bearing plate 10 (see FIG. 2) are provided on the upper surface of the upper body 30. Also, for the bolts 20a to 20h and the positioning pins 21a and 21b for joining the upper body 30 and the lower body 40 (see FIG. 2), female screw holes 39a to 39h and positioning holes 38i and 38j are provided as shown in FIG. ing.
[0020]
The lower main body 40 includes a circular bearing hole 41 at the center of the lower part as shown in FIGS. 8A, 8B, and 10, and a mud feed hole 42 and a mud discharge hole 43 having a semicircular cross section in the rear surface part. A mud feed hole 44 and a mud discharge hole 45 having a semicircular cross section are formed on the opposed front part, and a mud feed hole 42, a mud discharge hole 43, a mud feed hole 44, and a mud discharge hole are formed in the central part. A circular chamber 2 having a rounded shape as viewed from above is provided on the lower peripheral surface communicating with 45, and is open upward. Ports 42b to 45b (see FIG. 9) having a semicircular cross section are formed in the portion communicating with the outside of the mud feed hole 42 or the exhaust mud hole 45, and packing grooves 42a to 45a are respectively provided around the packing holes 22 to 25 ( 1 and 2) can be mounted.
[0021]
As shown in FIG. 9, the mud feed hole 42 and the exhaust mud hole 43 are separated by a partition wall 46, and the mud feed hole 44 and the exhaust mud hole 45 are separated by a partition wall 47. The partition wall 46 has a fitting surface 46a that faces the chamber 2 and can be fitted with the valve body 5 (the right curved surface 54 in FIG. 11). Similarly, the partition wall 47 faces the chamber 2 and has a valve. The fitting surface 47a which can be fitted with the body 5 (left curve surface 53 of FIG. 11) is provided. The right side wall 28 and the left side wall 29 are provided in the direction orthogonal to the fitting surface 46a and the fitting surface 47a, and the inner central portion thereof includes the fitting surfaces 28a and 29a. As described above, this is for preventing leakage of muddy water in the passing state and the bypass state. Further, as shown in FIG. 9, female screw holes 49 a to 49 h and positioning holes 49 i and 49 j for combining the upper main body 30 and the lower main body 40 are provided on the upper surface of the lower main body 40.
[0022]
As shown in FIGS. 11 (a) to 11 (c), the valve body 5 is a plate-like body having an oval shape, and includes a front plane 51 and a rear plane 52 on the front and rear sides, and a band-shaped left car A curved surface 53 and a right curved surface 54 are provided, and an upper plane 55 and a lower plane 56 are provided vertically. Further, an angular shaft hole 57 is formed in the central portion in the vertical direction. The left curve surface 53 and the right curve surface 54 are fitted to the fitting surfaces 37a and 47a and the fitting surfaces 36a and 46a, respectively, in a muddy water passing state (when the valve body 5 is in the axial direction). On the other hand, in a muddy water bypass state (when the valve body 5 is in a direction orthogonal to the axial direction), the fitting surfaces 26a and 27a and the fitting surfaces 28a and 29a can be fitted respectively. It has become. That is, when viewed in plan along the axial direction, the valve body 5 divides and separates the chamber 2 into two left and right chambers in a parallel position (passing state), while the valve body 5 is a chamber in an orthogonal position (bypass state). 2 can be divided into two front and rear chambers.
[0023]
As shown in FIGS. 12A to 12D, the rotating shaft 6 is formed by connecting an upper shaft 60 and a lower shaft 61 by a spring pin 62. The upper shaft 60 includes an upper part 63 having a round cross section and a round lower part 64 having four cross sections cut. The upper part 63 can be fitted with the shaft hole 31 of the upper main body 30 by mounting an oil seal 65 (see FIG. 1). Further, the lower portion 64 can be fitted into the angular shaft hole 57 (see FIG. 11B) of the valve body 5. Further, the lower shaft 61 is fitted with an underwater bearing 66 (see FIG. 1) so that it can be fitted into the bearing hole 41 of the lower body 40 (see FIG. 8). Thus, the rotation shaft 6 is rotatable in the chamber 2 and the valve body 5 can be rotated.
[0024]
As shown in FIGS. 13A to 13D, the lever 7 includes a lever main body 70 that is a rectangular plate-shaped member, and a U-shaped ring member 71 that is erected on the rear end portion of the lever main body 70. A round shaft hole 72 formed at the front end of the lever body 70 and a spring hole 73 formed in communication with the round shaft hole 72.
[0025]
The hydraulic cylinder 8 includes a piston rod 80 as shown in FIGS. 25 and 26, and a large-diameter extension rod 81 is connected coaxially with the small-diameter piston rod 80, and is attached to the front surface of the left end portion of the extension rod 81. A slide portion 82 is provided. A guide member (not shown) for guiding the extension rod 81 to reciprocate in the axial direction is provided. The slide portion 82 includes a fixed plate 85 fixed to the extension rod 81 and a round bolt 87 fixed to a round hole (not shown) of the fixed plate 85. The round bolt 87 is the ring member 71. (See FIG. 13). The ring member 71 and the round bolt 87 correspond to the conversion mechanism referred to in the claims, and the reciprocating motion of the extension rod 81 is converted into the rotational motion of the lever 7.
[0026]
As shown in FIGS. 14A to 14C, the stopper 9 (9a, 9b) includes a bracket 92 having two round holes 90 and one female screw hole 91, and a round head and screwed into the female screw hole 91. The lever stopper 93 is made of a nut 94 that can be screwed with the lever stopper 93. The stopper 9 can be forcibly adjusted by the stopper 9 when the stroke of the cylinder of the hydraulic cylinder 8 does not come out.
[0027]
As shown in FIGS. 15A to 15C, the rectangular bearing plate 10 disposed in the lower portion of the lever 7 has a round plate 12 formed in the lower portion of the rectangular flange 11, and the surrounding three locations. The fixing holes 13a to 13c are drilled in the shaft, and the shaft hole 13d is drilled in the center.
[0028]
Operation | movement of the shaft bypass apparatus 1 of 1st Embodiment is demonstrated with reference to FIG. 25, FIG. As shown in FIG. 26, in the mud water passage state, as shown in FIGS. 1 to 4, the valve body 5 is arranged in a parallel position parallel to the axial direction, and as shown by the two-dot chain line arrow, the mud feeding pipe The muddy water from 312 is sent to the mud pipe 332 through the mud holes 32 and 42 (see FIG. 3), the chambers 2a and 2b, and the mud holes 34 and 44. Further, the muddy water containing earth and sand from the mud pipe 335 is sent to the mud pipe 315 through the mud holes 33 and 43, the chambers 2 a and 2 b, and the mud holes 35 and 45.
[0029]
On the other hand, in the bypass state, as shown in FIG. 25, the hydraulic cylinder 8 is driven, the piston rod 80 and the extension rod 81 are advanced, and the lever 7 is rotated 90 degrees. Then, the valve body 5 becomes a position orthogonal to the axial direction, and as shown by the two-dot chain line arrow, the muddy water from the mud pipe 312 is sent to the mud holes 32 and 42 and the chambers 2a and 2b. Is changed 180 degrees and sent to the mud pipe 315 through the mud holes 33 and 43.
[0030]
The reason why the muddy water passage state and the bypass state are alternately switched by the shaft bypass device 1 is to connect the propulsion pipe 303 and the like. That is, as shown in FIG. 26, the propelling pipe 303 is propelled with the valve body 5 in a position parallel to the axial direction and passing the muddy water, and after one propulsion, the valve body 5 is moved as shown in FIG. The mud is switched to the bypass state as a position perpendicular to the axial direction, and the mud is shortcut (short-circuited). After that, the propulsion pipe 303 is disconnected and connected.
[0031]
Next, a shaft bypass device 201 according to a second embodiment will be described with reference to FIGS. The shaft bypass device 201 basically performs the same function as the shaft bypass device 1, but the internal structure is slightly different. Therefore, the shaft bypass device 201 will be described mainly and shared with the shaft bypass device 1. The constituent elements are simply illustrated with numbers in the 200s, and the description thereof is omitted. As shown in FIGS. 20 to 22, the muddy water bypass block 203 is one in which a lid 240 is combined with a main body 230, and is not divided into an upper mold and a lower mold, and positioning is unnecessary. Further, as shown in FIGS. 23 and 24, a metal valve 259 is fixed to a side surface of a plastic valve 250 (for example, MC nylon). A plastic valve 250 is used for sealing, and a metal valve 259 is used for contact with earth and sand. The plastic valve 250 includes a front plane 251 having a recess 251a, a rear plane 252 having a recess 252a, a left curve surface 253, a right curve surface 254, an upper plane 255, a lower plane 256, and a square hole 257. . The metal valve 259 includes fixing holes 259a to 259d.
[0032]
Next, the shaft bypass device 501 of the third embodiment will be described with reference to FIGS. 28 to 31. The shaft bypass device 501 is provided with a manual lever 507, and is different from that driven by hydraulic pressure, but the basic structure is the same as that of the second embodiment described above, so the corresponding components are in the 500s. The description will be used to mainly explain the different configurations. The shaft bypass device 501 is characterized in that its movement is restricted by a stopper 509 so that the manual lever 507 can be rotated 90 degrees. The manual lever 507 is configured to be easily operated by hand. An oil seal 565 is mounted in the lid 540, holds the rotating shaft 506, and a seat ring 567 and a resin collar 568 are interposed, and a rotating nut 569 is fixed to the head of the rotating shaft 506 with a nut 569a. . A manual lever 507 is fixed to the rotating nut 569. A notch is provided in the rotating nut 569 so that the stopper 509 can come into contact therewith, and the movement of the manual lever 507 is set in a range of 90 degrees. Since there is no hydraulic cylinder in this embodiment, there is an advantage that the cost is reduced. However, manual operation is required and a little labor is required compared with the above-described embodiment.
[0033]
Next, the excavator main body 4 will be described with reference to FIGS. The excavator main body 4 is divided into a front cutter unit 100 and a rear in-machine bypass unit 101, and the in-machine dug water bypass device 1 ′ is disposed in the in-machine bypass unit 101. The outer casing of the machine main body 4 includes an outer tube 102, a first partition wall 103, an outer tube 104, a second partition wall 105, a recessed portion 106, a connection tube 107, an outer tube 108, a connection tube 109, and a fixture 110 in order from the front. The concave portion 111 is formed by being connected.
[0034]
As shown in FIG. 37, pressure transmitters 18 and 19 are respectively provided on the mud feed pipe 14 and the mud feed pipe 16 and light pressure wires 18a and 19a extending therefrom are passed through through holes (not shown), and the pressure of the mud water. Is transmitted to the outside. Based on the detection signals from the pressure transmitters 18 and 19, when the mud water bypass device 1 ′ in the excavator is in the muddy water passage state, the propulsion speed of the excavator main body 4 is controlled by controlling the driving force of the main pushing device 306. Or when the mud water bypass device 1 'in the excavator is in the muddy water bypass state, when the balance between the inner pipe pressure on the back side and the front pressure (cutting blade pressure) of the mud water bypass block 3' is achieved This is because the in-machine mud-water bypass device 1 'is switched to the passing state to avoid the risk of ground collapse and blockage due to the impact (shock) of the mud. That is, the detected values of the pressure transmitters 18 and 19 provide a guide for measuring the switching timing of the muddy water bypass block 3 ′. The lightweight hydraulic hose 8a (see FIG. 35) and the lightweight electrical wires 18a and 19a are not connected to each of the connection bodies (connection units) 180 described later, but are bundled to some extent and connected. For 10 connections of the body 180, the connection work is performed once, thereby reducing the amount of work.
[0035]
The excavator mud bypass device 1 ′ has the same structure as that of the shaft bypass device 1, and is disposed at a position below the central axis of the excavator main body 4. The description of the structure of the mud-water bypass device 1 ′ in the excavator uses the description of the shaft bypass device 1, and the corresponding component is given a dash on the corresponding number. The muddy water bypass block 3 ′ is a choice between sending muddy water and discharging muddy water and earth and sand (hereinafter referred to as a “passing state”) or blocking the passage state (hereinafter referred to as a “bypass state”). It has a function as a gate that can be switched automatically. The passing state is necessary for supplying muddy water to the cutting blade surface accompanying the propulsion of the propelling pipe 303 and discharging muddy water and earth and sand from the cutting blade surface, and the bypass state is the addition of the propelling pipe 303 and the like. It is necessary to prevent the blockage of the pipeline and the collapse of the natural ground at the time of connection.
[0036]
Further, at the center of the excavator main body 4, the central rotation shaft 112 is rotatably supported by the first partition wall 103 and the second partition wall 105. That is, an oil chamber 113 and an oil chamber 114 are provided between the central rotating shaft 112 and the first partition wall 103, and an oil supply path 115 and an oil supply path 116 are in communication with each other. The fixing plate 117 in front of the oil chamber 113 is fixed to the screw hole 119 on the front surface of the first partition wall 103 with a bolt 118. Inside the oil chamber 113, a mechanical seal 120 is provided on the outer periphery of the central rotating shaft 112. A screw hole 121 is provided between the oil chamber 113 and the oil chamber 114. A double row tapered roller bearing 122 is provided on the outer periphery of the central rotating shaft 112 inside the oil chamber 114. A nut 123 and a washer 124 are provided behind the double row tapered roller bearing 122. A female screw 125 and an oil seal 126 are provided on the rear side. A fixing plate 127 is fixed to the rear portion of the first partition 103 with a bolt 128. Oil is prevented from leaking from the outer tube 104 into the central chamber 129.
[0037]
A cutter 131 is fixed to the front chamber 130 at the front end portion of the central rotating shaft 112, and a pilot pipe fitting 132 is fixed to the front central portion of the cutter 131. The pilot pipe attachment 132 can attach a pilot pipe 302 and a read head 302a, which will be described later, and has a structure that prevents the rotation of the central rotating shaft 112 from being transmitted to the pilot pipe attachment 132. A spline male portion 133 is formed at the rear end portion of the central rotating shaft 112, and forms a spline connection with the spline female portion 135 of the central rotating shaft 134. The outer peripheral part of the spline female part 135 and the inner peripheral part of the second partition 105 are provided with an oilless metal 136 and function as bearings. The rear end portion of the oilless metal 136 is pressed by a flange 137 and receives the thrust of the central rotating shaft 134. A space between a rear end outer peripheral portion of the first partition wall 103 and a front end inner peripheral portion of the outer tube 104 is sealed with an O-ring 138. Further, the O-ring 139 seals between the rear end inner peripheral portion of the first partition wall 103 and the inner peripheral portion of the fixing plate 127. Furthermore, the O-ring 140 seals between the rear end outer peripheral portion of the second partition wall 105 and the front end inner peripheral portion of the connection pipe 107.
[0038]
A spline female portion 141 is formed at the rear end portion of the central rotating shaft 134 and is connected to the male spline portion 189 formed at the front end portion of the central rotating shaft 188 (see FIG. 38). The outer peripheral part of the central rotating shaft 134 and the inner peripheral part of the fixture 110 are provided with an oilless metal 144 and function as bearings. The front end portion of the oilless metal 144 is pressed by the flange 145 and receives the thrust of the fixture 110. A rear chamber 149 is formed between the second partition wall 105 and the fixture 110. In the rear chamber 149, the above-mentioned mud-water bypass device 1 ′ in the excavator is provided below the central rotating shaft 134. An oil seal 143 is fitted on the inner peripheral surface of the rear end of the fixture 110.
[0039]
A mud feeding system 150 and a mud draining system 170 (not shown) are formed below the center rotating shaft 112 and the center rotating shaft 134. The mud feed system 150 and the waste mud system 170 are provided in parallel with each other and have the same structure. Therefore, the mud feed system 150 will be described, and the description of the mud feed system 150 is applied mutatis mutandis. I won't do that. This mud feed system 150 is for sending muddy water from right to left in FIG. 36 to the front chamber 130. From the front, the mud feed through-round hole 151, which is drilled downward from the inside of the first partition wall 103, 2 Mud feed through round hole 152 drilled below inside partition 105, mud feed through round hole 151 and connection circular pipe 153 connecting mud feed through round hole 152, mud feed through round hole 152 and mud water bypass block A mud feed pipe 16 for connecting 3 ', a bent mud feed through-hole 154 which is perforated below the inside of the fixture 110 and into which a mud feed pipe 194 (see FIG. 38) described later can be inserted at the rear. It is comprised from the mud feed pipe 14 which connects the front part of the mud penetration round hole 154, and the muddy water bypass block 3 '. An oil seal 155 is attached between the inner peripheral portion of the mud feed through round hole 152 of the second partition wall 105 and the outer peripheral portion of the connection circular pipe 153. Further, an oil seal 156 is mounted between the inner peripheral portion of the mud feed through round hole 152 of the second partition wall 105 and the outer peripheral portion of the mud feed pipe 16. Further, oil seals 157 and 158 are attached to the inner peripheral portion of the mud feed through round hole 154 and the outer peripheral portion of the mud feed pipe 14. The mud discharge system 170 discharges the mud water supplied from the mud supply system 150 and the earth and sand excavated by the cutter 131. In FIG. 36, the mud water flows from the left to the right. is there. In addition, as shown in FIG. 37, the check valve 147 forms a mud film on the ground of the outer periphery of the propelling pipe 303 by supplying a high-concentration liquid material containing a high amount of packing material, and stabilizes the face. Is. As an example of the size of the excavator main body 4, a length of 902 mm and a diameter of 242 mm can be cited.
[0040]
The connection body 180 connected to the above-described excavator main body 4 will be described with reference to FIGS. As shown in FIG. 39, the connecting body 180 includes a front connecting plate 186, through holes 181 and 182 on both sides of the upper part, a through round hole 183 in the center, a through round hole 184 on the lower left side, and a through hole on the lower right side. A round hole 185 is formed. Further, a rear connection plate 187 having a similar structure is provided (see FIG. 40). Light weight electric wires 18a and 19a can be passed through the through hole 181 and light weight hydraulic hose 8a can be passed through the through hole 182. The central rotary shaft 188 is inserted into the through-round hole 183, the bolt 192 is screwed into the nut 193 provided at both ends of the propulsive force transmission shafts 191a to 191c via the front connection plate 186, and the mud pipe 194 is inserted into the through-round hole 185. The sludge discharge pipe 195 is inserted into the through-hole 184, and the rear connection plate 187 is the same. Further, the holding plates 197 and 198 are further passed through the propulsive force transmission shafts 191a to 191c, the sludge feed pipe 194, the sludge discharge pipe 195, etc. This makes it one body. The guide bolts 196a to 196e provide guidance when the connection body 180 is connected to the excavator main body 4. Further, as shown in FIG. 41, the connecting body 180 is detachably connected to the main pushing device 306 with an attachment 366 interposed therebetween, which will be described later in detail. In addition, as an example of the size, the length of the propelling tube 303 is 1000 mm, the diameter is 216 mm, the length of the connection body 180 is 1050 mm, and the diameter is 193 mm. Oiles metal 199 is a bearing.
[0041]
The operation of the mud-water bypass device 1 ′ in the excavator will be described. As shown in FIGS. 32 and 33, in the above-mentioned muddy water passing state, the valve body 5 ′ is arranged in a parallel position parallel to the axial direction, and the muddy water from the mud pipe 14 is fed as shown by the two-dot chain line arrow. It is sent to the mud pipe 16 through the mud holes 32 ′ and 42 ′, the chambers 2 a ′ and 2 b ′, and the mud holes 34 ′ and 44 ′. Moreover, the muddy water containing the earth and sand from the mud pipe 17 is sent to the mud pipe 15 through the mud holes 33 'and 43', the chambers 2a 'and 2b', and the mud holes 35 'and 45'.
[0042]
On the other hand, in the bypass state, as shown in FIG. 33, the hydraulic cylinder 8 ′ is driven, the piston rod 80 ′ and the extension rod 81 ′ are advanced, and the lever 7 ′ is rotated 90 degrees. Then, the valve body 5 ′ is in a position orthogonal to the axial direction, and as shown by the two-dot chain line arrow, the muddy water from the mud pipe 14 is sent to the mud holes 32 ′ and 42 ′ and the chambers 2a ′ and 2b ′. The direction is changed by 180 degrees by the valve body 5 ′, and sent to the mud pipe 15 through the mud holes 33 ′ and 43 ′.
[0043]
In this way, the mudwater bypass device 1 ′ in the excavator is alternately switched between the passing state and the bypassing state of the excavator so as to receive the sediment pressure and avoid the collapse of the sediment and avoid the blockage of the sediment in the mud pipe. It is to do. That is, as shown in FIG. 32, the valve body 5 ′ is set in a position parallel to the axial direction, and the propelling pipe 303 is propelled while passing the muddy water. Switch the mud water to the bypass state with the position perpendicular to the axial direction, shortcut the mud water (short circuit), flush the clogged soil and empty the pipe. After that, the propulsion pipe 303 is disconnected and connected. In addition, when the muddy water is once stagnated in the pipe when the propulsion pipe 303 is additionally connected (stage change) and the propulsion of the propulsion pipe 303 is resumed, the pipe pressure before the muddy water bypass block 3 ′ is changed to that of the muddy water bypass block 3 ′. Since the gate is opened when the balance with the back (cutting blade pressure) is achieved, it is possible to avoid the risk of ground collapse and blockage due to the impact (shock) of the mud. The detected values of the pressure transmitters 18 and 19 provide a guide for measuring the switching timing of the muddy water bypass block 3 ′.
[0044]
According to the shaft bypass devices 1, 201, and 501 of the first to third embodiments described above, the following effects are produced.
(A) The structure of the shaft bypass devices 1, 201, 501 can be simplified and miniaturized.
(B) Since the bypass is switched by the hydraulic cylinder 8 according to a command from the central operation panel 310, the operation is easy.
(C) The number of operations is reduced, and troubles due to operation mistakes do not occur.
(D) Contributes to overall propulsion work efficiency.
(E) Space occupied in the start shaft 304 is reduced, and construction with a small shaft is possible.
[0045]
Next, a muddy water pressurizing small-diameter pipe propulsion device 301 including the excavator main body 4 to which the shaft bypass device 1 is applied will be described with reference to FIGS. 27, 42, and 43. This is because a small pilot pipe 302 made of metal (L = 600 mm as an example of size, φ60 mm: also called a leading pipe) and a large-diameter propelling pipe 303 (approximately L = 800 mm to 1,000 mm, approximately φ150 to 500 mm). ), A base 305 installed on the bottom surface 304a of the starting shaft 304 (inner diameter of about 1500 mm), and a hydraulic main pushing device 306 for operating the excavating hydraulic motor and the main pushing jack fixed on the base 305. (Total stroke of about 1030 mm), a detector 307 configured to include a transit for measuring the propulsion status of the pilot pipe 302, and devices such as a hydraulic pump, an electric motor, and a pressure adjustment valve are incorporated to drive the main pushing device 306 The hydraulic unit 308 installed on the ground and installed on the ground, mud is used as the working fluid. It includes a simple muddy water treatment device 309 that pressurizes and recirculates muddy water, a logic operation circuit for controlling the muddy water pressure state, operation buttons such as a switch button of the shaft bypass device 1, and a display unit. Central control panel 310, a hydraulic unit 314 in which devices such as a hydraulic pump, an electric motor, and a pressure regulating valve are installed to supply hydraulic pressure to the hydraulic cylinders 8 and 8 ', a lubricant injection device 321 and various parameters. It is composed of a display box for displaying, a display device, a meter box 330 including a pilot lamp and the like. The meter box 330 includes a face-side pressure meter, a bypass-side pressure meter, a flow meter, and a bypass valve opening / closing display section (lamp, etc.). Further, a mud feed pump 311 is installed at the outlet of the simple mud treatment apparatus 309, and the shaft bypass device 1 is interposed from a rigid mud feed pipe 312 (for example, a steel pipe may be used but a hard vinyl chloride pipe may be used). Thus, muddy water can be supplied to the excavator main body 4. When the vertical mud treatment device 309 is stopped once the vertical pipe bypass device 1 is connected to the propulsion pipe 303, it takes time for the mud mud produced to settle and the mud water to stabilize again. This is for always maintaining the flow rate of the simple muddy water treatment apparatus 309 even at the time of connection. On the other hand, the earth and mud excavated by the excavator main body 4 are connected to a connecting body 180, a rigid drainage pipe 315 (for example, a steel pipe can be exemplified, but a rigid polyvinyl chloride pipe or the like may be used), a shaft bypass device 1 and waste mud. A simple muddy water treatment device 309 can be discharged and refluxed via a pump 316 or the like. The gantry 305 supports the excavator main body 4 and the propulsion pipe 303 and includes a level jack, a reaction force plate, and a front jack.
[0046]
As described above, the shaft bypass device 1 is a device that changes the flow of muddy water sent from the ground simple muddy water treatment device 309. The mud pipe 312 and the mud pipe 315 are supplied with mud and waste mud. The flow can be switched so that the muddy water is not returned to the excavator main body 4 and can be immediately returned (returned) from the shaft bypass device 1 to the simple muddy water treatment device 309. The shaft bypass device 1, the mud pump 311, the mud pump 316, etc. are usually more efficient when installed in the start shaft 304, but can also be installed on the ground if they do not enter. The simple muddy water treatment apparatus 309 mainly supplies muddy water to the excavator main body 4, receives the muddy water and the earth and sand excavated by the excavator main body 4 from the excavator main body 4, separates the muddy water and the earth and sand, and separates them. The muddy water is supplied to the excavator main body 4 after being refluxed (recycled). Specifically, the muddy water is composed of a stirrer, a muddy water treatment machine, a sedimentation layer, an adjustment layer, and the like. This simple muddy water treatment device 309 is always in operation, but only when a slurry pump (not shown) works to pump up muddy water, muddy water is applied to the vibrating sieve (not shown) so as to be processed.
[0047]
In addition, a sludge flow meter 317 is installed in the sludge pipe 315 close to the simple muddy water treatment device 309, and signals measured there or various signals from the main pushing device 306, the pressure transmitters 18, 19, etc. are sent to the central operation panel 310. From the central operation panel 310, various signals such as driving signals to the simple muddy water treatment device 309, the main pushing device 306, the hydraulic cylinders 8 and 8 ', the hydraulic unit 308, and the like are outputted. Moreover, as a kind of the propulsion pipe 303, various kinds of pipes such as a vinyl chloride pipe, a steel pipe, a fume pipe, and a resin con pipe can be cited. FIG. 42 shows an example of the propulsion process of the pilot pipe 302. In addition, each of the pilot pipe 302 and the propulsion pipe 303 has a structure that can be connected so as to be disengageable in the axial direction (in some cases, the peripheral surface of the end is threaded).
[0048]
As shown in FIG. 43, an automobile 318 on the ground is loaded with a connecting body 180, a pilot pipe 302, a propulsion pipe 303, an excavator main body 4, a generator 319, a crane 320, and the like, and the construction range is surrounded by a fence 324. ing. The crane 320 transfers the pilot pipe 302, the propulsion pipe 303, the connecting body 180, and the like to the start shaft 304, and is propelled by the main pushing device 306 while connecting the pilot pipe 302 in the first stage, and is transferred to the pilot pipe 302 in the second stage. The excavator main body 4 is connected and propelled, and then the excavator main body 4 can be propelled while the propulsion pipe 303 and the connecting body 180 are added.
[0049]
The main pushing device 306 shown in FIG. 41 shows an example, and various other modes are possible. The main pushing device 306 includes two rails 360 arranged in parallel at predetermined intervals, a sliding portion 361 that can slide along the rail 360, a reciprocating portion 362 suspended between the sliding portions 361, The hydraulic cylinder 363 forcibly propelling and retreating the reciprocating part 362, the hydraulic motor 364 provided on the upper part of the hydraulic cylinder 363, and the end portions of the pilot pipe 302, the excavator main body 4 and the connecting body 180 can be detachably fixed. A rotation support member 365 fixed to the reciprocating part 362 for propelling them while rotating them, and an attachment 366 fixed to the reciprocating part 362 for detachably fixing the propelling pipe 303, and a swivel fitting (not shown). The mud pipe 342 and the mud pipe 345 (Fig. 27 (See below). These swivel pipe joints are used for the mud pipe 194 and the mud pipe 195 (Fig. 40 This is because it is necessary to make the structure flexible because it reciprocates by propulsion. In addition, the propulsion unit 362 propels the connecting body 180, so that a strong propulsive force can be generated in the excavator main body 4. For other detailed structure of the main pushing device 306, refer to Japanese Patent Laid-Open No. 10-46984. Other hydraulic small main pushing devices can also be employed.
[0050]
The overall construction procedure will be described later in the muddy water pressurizing small-diameter pipe propulsion method, but the outline of the operation will be described here. As shown in FIG. 41, the pilot pipe 302 is attached to the rotation support member 365, and pressure oil is supplied from the hydraulic unit 308 to the hydraulic motor 364 based on the command of the central operation panel 310 shown in FIGS. The hydraulic cylinder 363 is driven by an operation unit (not shown) of 306 and the rotation support member 365 is rotated to propel the reciprocating unit 362 while rotating the pilot pipe 302. When the pilot pipe 302 is pushed in, the pilot pipe 302 is detached from the rotation support member 365 and the reciprocating part 362 is retracted. The pilot pipe 302 is added and connected to the rotation support member 365. In this way, the pilot pipe 302 is repeatedly propelled to reach the reaching shaft 385 (see FIGS. 48 to 53). At this stage, the muddy water is not pressurized by the simple muddy water treatment device 309 or the like.
[0051]
When the first step is thus completed, the connection between the pilot pipe 302 and the rotation support member 365 is then released, and the reciprocating part 362 is retracted. A pilot pipe fitting 132 is connected to the rear part of the pilot pipe 302, and both ends of the excavator main body 4 in FIG. 36 are connected to the pilot pipe fitting 132 and the main pushing device 306, respectively. The spline female portion 141 is spline-coupled to the rotation support member 365 and the attachment 366 is connected to the fixture 110. The mud feed penetrating round hole 154 and the drain mud hole (not shown) are connected to the mud feed pipe 342 and the mud pipe 345 through a swivel pipe joint.
[0052]
When the connection of the excavator main body 4 as described above is completed, the shaft bypass device 1 and the excavator mud bypass device 1 ′ are made to pass by a command from the central operation panel 310 of FIG. The mud pump 311 and the exhaust mud pump 316 are driven, and as shown in FIGS. 27 and 41, the mud is fed from the simple mud treatment apparatus 309 to the mud pipe 312, the shaft bypass device 1, the mud pipe 332, and the mud pipe 342. The earth and sand excavated by the cutter 131 of the main body 4 of the excavator 4 are transferred to the front chamber 130, the mud water bypass device 1 ′ of the excavator, and the connection body. 180, the sludge pipe 345, the sludge pipe 335, the shaft bypass device 1, the sludge pump 316, and the sludge pipe 315 are returned to the simple muddy water treatment device 309 and simplified. In the water treatment apparatus 309, performs processing such as separating the mud and sediment, circulating the mud in front chamber 130 of the shield machine main body 4. At this time, the central operation panel 310 controls the power of the mud pump 311 and the mud pump 316 on the basis of the output of the mud flow meter 317 and the like in order to smooth and stabilize the propulsion. The flow rate is optimized.
[0053]
Further, as shown in FIG. 32, in the excavator main body 4, the valve body 5 ′ is set in the parallel position, and the rotary support member 365 of the reciprocating unit 362 is driven to rotate by the action of the hydraulic cylinder 363. Rotational power is transmitted to the cutter 131 via 112 and 188 and rotated integrally. The mud water from the mud system 150 and the earth and sand excavated by the cutter 131 are discharged from the mud system 170. At the same time, the excavator main body 4 is press-fitted and propelled by the action of the hydraulic cylinder 363. The holding plates 197 and 198 (see FIG. 38) have a structure that is not interlocked with the rotation of the central rotation shaft 188, but may be slightly rotated. Other than the central rotary shafts 112, 134, and 188 and the cutter 131 go straight.
[0054]
When the start of the excavator main body 4 is finished, the mud-water bypass device 1 ′ in the excavator is switched to the bypass state by a command from the central operation panel 310, and then the shaft bypass device 1 is switched to the bypass state. Then, the return of mud water to the mud feed system 150 and the waste mud system 170 is stopped, and the inside of the mud feed system 150 and the waste mud system 170 is appropriately cleaned. If the specific gravity of the muddy water is higher, the negative pressure is applied to the drainage pump 316 than the settling speed in the pipe, and the muddy water in the pipe is pulled, or an air inlet is provided on the mud feed side of the shaft bypass device 1 to discharge the mud. If air is injected from the mud feeding system 150 while the pump 316 is operated, the inside of the pipe is cleaned. In general, even when muddy water remains in the pipe, if the connection between the excavator main body 4 and the main pushing device 306 is cut off, it flows into the start shaft 304. After that, the excavator main body 4 and the reciprocating part 362 (see FIG. 41) are dissociated, and the reciprocating part 362 is retracted. The connection body 180 and the front end portion of the propulsion pipe 303 are connected to the rear end portion of the excavator main body 4, and the connection body 180 and the rear end portion of the propulsion pipe 303 are connected to the reciprocating portion 362 via an attachment 366. Then, the shaft bypass device 1 is switched to the passing state. Next, the mud water bypass device 1 ′ in the excavator is switched from the bypass state to the passing state, but the operation is performed after the mud pressure inside the mud feeding system 150 and the pressure on the face side are balanced. That is, when the mud feed system 150 from the mud bypass device 1 ′ in the excavator and the mud system 170 and mud from the mud bypass device 1 ′ in the excavator are recirculated so that the mud flows in the pipe to some extent, the water pressure also increases. Pressure difference from the face side is approximately 0.1 kg / cm ² Then, the mud water bypass device 1 ′ in the excavator is switched, the mud is sent, the valve body 5 ′ is set in a parallel position, and the excavator main body 4 (sometimes called a leading conductor), the propulsion pipe 303 and the connection body 180 are propelled. I do.
[0055]
Such a muddy water pressurizing and propelling step is repeated until the reaching shaft 385 is reached while the propelling pipe 303 and the connecting body 180 are added. In the present embodiment, 50 propulsion pipes 303 and connection bodies 180 are connected, but the number of connections can be appropriately selected according to the scale of construction. In the case of blockage or the like, mud water may flow backward.
[0056]
Next, the construction procedure of the muddy water pressurizing small-diameter pipe propulsion method according to the embodiment will be described with reference to FIGS. Here, an example is shown in which the muddy water pressurizing small-diameter pipe propulsion device 301 shown in FIGS. 41 to 43 is applied, but various modifications are possible.
The basic principle of this construction method is to propel and construct a PVC pipe with an inner diameter of 200 mm to 450 mm as a propulsion pipe 303 (buried pipe). A main pushing device 306 is installed in the start shaft 304 and adjusted with a simple muddy water treatment device 309 on the ground. The muddy water is returned to the excavator main body 4 and excavated by the cutter 131 while stabilizing the face, and the excavated earth and sand is fluid-transported to the ground by the mud pump 316 or the like. In this construction method, the first step is a temporary pipe combined press-fitting method and the second step is a muddy water excavation method. In the first process, the steel readhead 302a is used to correct the direction and press-fit and propel it up to the reach shaft 385, and the second process pilot pipe 302 is used as a guide to drive the excavator body 4 (leading conductor) to the original drive system. Then, the joint body 180 bears a propulsive force load, bears an initial resistance force, and the propulsion pipe 303 bears only the resistance of the outer surface of the soil pipe, so that the polyvinyl chloride pipe which is a low load-bearing capacity pipe. This is a method of promoting and burying. The propulsion pipe 303 used here is a PVC pipe, and φ200, φ250, φ300, φ350, φ400, and φ450 are standard, and φ250 is standard for the fume tube. For propulsion extension, 1 span 70m is standard, and the maximum is about 80m depending on the soil quality. The excavator main body 4 is divided into two parts and can be collected in the 1st person hole. Construction is possible even in soil with a lot of water by the mud water bypass device 1 'in the excavator.
[0057]
(1) Preparatory work (Step S101: See FIG. 44)
A start shaft 304 shown in FIG. 46 is constructed. First, as shown in FIG. 47, a swirl press-fitting machine 370 swivels and presses a lower manhole housing 371 having a water stop 372, and excavator 373 excavates earth and sand. An intermediate manhole housing 374 is connected on the lower manhole housing 371 by welding. The intermediate manhole housing 374 is swivel press-fitted with a swivel press-fitting machine 370, and earth and sand are excavated with an excavator 373. A steel cylindrical connecting casing 375 is detachably connected to the intermediate manhole housing 374. The foundation underwater concrete 376 is placed so that the bottom surface 304 a is formed at the bottom of the lower manhole housing 371. Similarly, the reaching shaft 385 is constructed. Then, preparations for carrying in the equipment are performed. Survey. That is, the pipeline center is marked near the start shaft 304. In addition, the propulsion plan height and the machine installation high position are marked by level surveying.
[0058]
When the above is explained supplementarily, as shown in FIG. 46, the lower manhole housing 371 has a steel blade-like member 379 fitted and fixed to the lower end of the cylindrical reinforced concrete 378, and a steel cylindrical member to the upper end edge. 380 is fitted and fixed. A plurality of saw teeth are arranged circumferentially at the lower end of the blade-like member 379. The lower end of the reinforced concrete 378 has a tapered inner peripheral surface in order to reduce resistance during swiveling press-fitting. Each of the above elements is manufactured integrally in the manhole manufacturing process to form a lower manhole housing 371. Since the water stop 372 attached with a filter or rubber is attached to the lower manhole housing 371 in advance, water and earth and sand do not enter the manhole when starting the small-diameter propulsion method, and the chemical solution This eliminates the need for injection work and enables smooth small-diameter propulsion work. The intermediate manhole frame 374 is formed by fitting and fixing steel cylindrical members 382 and 383 to the upper end and the lower end of a cylindrical reinforced concrete 381, respectively. Each of the above elements is manufactured integrally in the manhole manufacturing process to form an intermediate manhole housing 374. These are disclosed in detail in JP-A-9-60020, so please refer to this. Note that the inner diameter of the start shaft 304 is φ1,500 mm (in the present embodiment, a range of about φ1,500 to 2,000 mm is preferable). In addition, although the construction work of the reach shaft 385 is performed similarly, the conventional liner plate method etc. may be used and an internal diameter can also be set arbitrarily.
[0059]
(2) Wellhead construction (S102: see Fig. 44)
A wellhead is provided at the start shaft 304.
[0060]
(3) Machine installation work (S103: See Fig. 44)
The gantry 305 and the main pushing device 306 are installed in the start shaft 304 in a planned gradient and a planned direction (not shown). That is, the main pushing device 306 is set in the start shaft 304 in the direction of the planned propulsion pipe center (not shown) and is suspended. Fine adjustment is performed on the inner wall surface of the manhole with a spacer (not shown) at the marked position, and the main pushing device 306 is temporarily installed. The pipe gradient is measured by a level (not shown) or the like, and the pipe core of the main pushing device 306 is matched with the planned propulsion pipe center. After the installation of the main pushing device 306 is completed, the gantry 305 and the main pushing device 306 are sufficiently fixed, and the gantry 305 and the manhole wall are fixed by welding or a jack. The reaction force of the main pushing device 306 is taken from the manhole wall. In addition, when the water stop 372 is directly assembled | attached to the manhole housing here, the process of mirror cutting or chemical | medical solution injection | pouring is unnecessary.
[0061]
(4) Mirror cutting (S104: See Fig. 44)
Perform mirror cutting.
[0062]
(5) Ground improvement work (S105: See Fig. 44)
If necessary, improve the ground by injecting chemicals.
[0063]
(6) Pilot pipe propulsion work (S106: See Fig. 44)
As a first step of propulsion, the pilot pipe 302 is propelled on the planned propulsion line by a consolidation method using a direction correcting device (not shown) (see FIGS. 49 and 50). The propulsion is performed while the pilot head 302 is connected and rotating from the start shaft 304 with the lead head 302a (see FIG. 42) as a leading role. In confirming the directionality, the lead lamp in the read head 302a is visually confirmed by the level from the rear side of the main pressing device 306 or by the detector 307. In addition, when the pilot pipe 302 is deviated from the planned propulsion and the direction needs to be corrected, the pilot pipe 302 is stopped rotating, the tip of the read head 302a is aligned with the correction direction, and propulsion is performed to restore the planned propulsion. Then, propulsion is performed while rotating the pilot pipe 302.
[0064]
(7) (8) PVC Pipe propulsion work and muddy water pressurization work (S107, S108: refer to FIG. 44)
As the second step of propulsion, the rear end of the last pilot tube 302 in the start shaft 304 among the pilot tubes 302 penetrated in the previous step after the pilot tube 302 of the first step has reached the reach shaft 385 is completed. By connecting the pilot pipe fitting 132 to the part, the excavator body 4 is connected to the rear end part of the pilot pipe 302, the rear end part of the excavator body 4 is connected to the main pushing device 306, and the simple muddy water treatment apparatus The excavator main body 4, the propelling pipe 303 and the connecting body 180 are propelled while the mud is sent and discharged by 309 and the mud is recirculated (see FIGS. 50 to 52). On the other hand, the pilot pipe 302 and the like are collected on the reach shaft 385 side. In this way, propulsion is performed while the propulsion pipe 303 and the connecting body 180 are connected. Then, about 50 propelling pipes 303 and connectors 180 are propelled.
[0065]
(9) Wellhead work (S109: See Fig. 44)
A wellhead is provided at the start shaft 304.
[0066]
(10) Mirror cutting (S110: See Fig. 44)
Mirror cutting is performed, and the excavator main body 4 is collected on the side of the reaching shaft 385.
[0067]
(11) Ground improvement work (S111: See Fig. 44)
If necessary, improve the ground by injecting chemicals.
[0068]
(12) Removal of facilities in the jurisdiction (S112: see Fig. 44)
The removal work of the connection body 180 etc. and the cleaning inside the pipe are performed. The connecting body 180 is recovered to the start shaft 304 side and disassembled (see FIG. 53). The main pushing device 306 and the like are removed, a mortar for height adjustment is placed, and the invert 377 is installed (see FIG. 54).
[0069]
(13) Machine removal (S113: Refer to FIG. 44)
Remove the machine such as the base 305 and the main pushing device 306.
[0070]
(14) Manhole upper construction (S114: See Fig. 44)
An upper manhole housing 387 is attached on the middle manhole housing 374. That is, the adjustment unit 388, the side block 389, the receiving frame 390, the lid 391, and the step 392 are attached. FIG. 54 shows the structure thus constructed. After the connection between the connection casing 375 (see FIG. 46) and the intermediate manhole housing 374 is released and the earth and sand are backfilled, the connection casing 375 is separated from the intermediate manhole housing 374 and removed, and thus the small-diameter propulsion work and the manhole are performed. 395 construction completed.
[0071]
In addition, process management is performed as shown in the standard process chart shown in FIG.
[0072]
(Second example mud pressurizing small-diameter pipe propulsion device)
The mud water bypass device in the excavator applied to the mud water pressurizing small-diameter pipe propulsion device of the second example shown below will be described. This example has the same configuration as the first example, but the configuration around it is changed. Accordingly, the description of the mud-water bypass device 1 ′ in the excavator will be applied mutatis mutandis, and other configurations will be described.
The muddy water pressurizing and propelling connector of the second example will be described with reference to FIGS. In order to make the first example more compact, this muddy water pressurizing connection body is partly changed in configuration. Therefore, the common configuration is not shown in the figure, and different configurations will be mainly described. In addition, about a part number, it shall be the number which generally added 1000 number.
First, the first connection body 1001 will be described with reference to FIGS. The first connection body 1001 includes a front connection member 1008 (see FIG. 55) and a rear connection member 1009 (see FIG. 56) at the front end portion and the rear end portion, respectively. The front connection member 1008 is provided with through-holes 1081 and 1082 on the left and right, a through-round hole 1083 in the center, through-holes 1084 and 1085 (communication with a half hole) at the bottom, and a through-hole 1086 at the top. ing. A similar hole is provided in the rear connection member 1009. The front end portion of the propulsive force transmission shaft 1006 is welded and fixed to the through-round hole 1083, and the central rotation shaft 1002 (see FIGS. 57 and 58) is inserted into the propulsive force transmission shaft 1006. 1085, the front end portions of the cylindrical mud pipe 1003 and the sludge discharge pipe 1004 are inserted and welded, and the front end portion of the cylindrical thrust transmission shaft 1005 is inserted and welded into the through-hole 1086 at the top. Each is arranged. Similarly, the rear end portions thereof are fixed to the rear connection member 1009.
[0073]
Further, as shown in FIGS. 59A to 59C, the holding member 1010 is made of a round and small-diameter plastic (for example, MC nylon), and is provided at four positions on the inner side of the peripheral portion of the front connection member 1008. Is provided. The holding member 1010 is formed in a cylindrical shape, a bolt hole 1012 is provided at the center, and a taper is provided on the peripheral surface. As shown in FIG. 58, bolts 1014 and washers 1015 are attached to the bolt holes 1012, and a part of the outer peripheral portion of the holding member 1010 is fixed so as to protrude slightly from the respective outer peripheral surfaces of the front connecting member 1008. Yes. Similarly, a holding member 1011 (see FIG. 57) made of a round, small-diameter plastic (for example, MC nylon) is provided inside the peripheral edge of the rear connection member 1009. A part of the outer peripheral portion of the holding member 1011 is disposed so as to slightly protrude from each outer peripheral surface side of the rear connection member 1009. When the first connecting body 1001 is inserted into the propulsion pipe 1505 formed of plastic, for example, vinyl chloride resin, the first connecting body 1001 can be held inside the propulsion pipe 1505 by the holding member 1010 and the holding member 1011. It is a thing. Thereby, rubbing etc. can be prevented.
[0074]
61 (a) to 61 (c), a central rotary shaft 1002 formed of a hollow body has a short cylindrical male spline portion 1022 fitted to the front end portion of the central rotary tube 1021 and connected by welding. . The male spline portion 1022 has a circular square spline 1024 at the front end thereof. The rectangular spline 1024 is a rectangular shape with a predetermined number of splines formed on the outer periphery, and protrudes outward from the front connecting member 1008 in the axial direction. The central rotating shaft 1002 is formed by fitting a short cylindrical female spline portion 1025 to the rear end portion of the central rotating tube 1021 and welding it. The female spline portion 1025 communicates with the outside, and has a square shape and a predetermined number of square splines 1027 (bosses) on its inner peripheral surface. The central rotation shaft 1002 can be inserted into the propulsive force transmission shaft 1006. As shown in FIG. 56, a holding portion 1028 is provided at the end of the propulsive force transmission shaft 1006 so that the central rotary tube 1021 can be held.
[0075]
The mud feeding pipe 1003 and the mud discharging pipe 1004 (see FIG. 57) are long circular pipes as shown in FIG. 56, and are set to have substantially the same length as the central rotation shaft 1002. The collars 1023 and 1026 forming the outer circumferences of both end portions of the mud pipe 1003 have the same structure as the annular first joint pipe 1031 (see FIG. 60) and the second joint pipe 1032 (first joint pipe 1031), respectively. ) Can be removably inserted. As shown in FIG. 60, four annular grooves 1033 are provided on the outer peripheral surfaces of the first joint pipe 1031 and the second joint pipe 1032, and O-rings 1035 are respectively fitted to them. Further, a fitting groove 1036 is formed in the front. Since a similar joint pipe can be removably inserted into the collar 1029 (see FIG. 55) of the mud drain pipe 1004, illustration and description thereof are omitted.
[0076]
As shown in FIG. 56, the propulsive force transmission shaft 1005 includes a circular tube 1051, and the front end portion thereof is inserted into the front connection member 1008 and fixed by welding or a bolt and nut. Similarly, the rear end portion of the circular pipe 1051 is also inserted into the rear connection member 1009 and is fixed by welding or bolts and nuts. Here, the total number of propulsive force transmission shafts 1005 and 1006 is two, but the number is not limited to this, and the number of propulsive force transmission shafts 1005 and 1006 can be appropriately set.
[0077]
The front connecting member 1008 will be described with reference to FIGS. 55 to 58. This is a plate-like body having a constant thickness in the axial direction, and is formed in a face plate having two vertical surfaces on the front and rear sides. Lightweight electric wires 1418a are formed in the through holes 1081 and 1082. , 1419a (see FIG. 75) can be passed through the through hole 1081, and the lightweight hydraulic hose 8a ′ (see FIG. 35) can be passed through the through hole 1082. Bolts 1088a to 1088e are respectively screwed into bolt through holes (not shown). When connecting the 1st connection body 1001 to the below-mentioned excavator main body 1013, it fixes with this volt | bolt 1088a-1088e. The central rotation shaft 1002 is configured to be housed inside a tubular propulsive force transmission shaft 1006. The propulsive force transmission shaft 1006 can be fixed by being inserted into the through-round hole 1083 of the front connection member 1008 and the through-round hole 1083 of the rear connection member 1009.
[0078]
Moreover, the 1st connection body 1001 is provided with the back connection member 1009 of the structure similar to the front connection member 1008 (refer FIG. 56, FIG. 64). Since this is in accordance with the description of the front connection member 1008, detailed description thereof is omitted, and therefore, a number obtained by adding 10 to the corresponding part number is illustrated. The holding member 1011 has the same structure as the holding member 1010. However, there is provided a hook groove 1120 (see FIG. 57) in which a connecting hook 1110 (see FIG. 57) for detachably connecting the first connecting body 1001 and the second connecting body 1201 is provided. The structure is almost the same. The connection hook 1110 simplifies the connection work between the first connection body 1001 and the second connection body 1201 or the connection work between the second connection bodies 1201.
[0079]
74 (a) to 74 (d), the connecting hook 1110 has a rectangular shape when viewed from above, and is tapered on both sides of the upper surface, and the rectangular parallelepiped grooves 1111 and 1112 are notched on both side surfaces. In addition, a U-shaped groove 1113 is provided in the transverse direction. The lengths of the rectangular parallelepiped grooves 1111 and 1112 are larger than the total thickness of the front connection member 1008 and the rear connection member 1009. As shown in FIG. 57, the connecting hook 1110 is fitted into the U-shaped hook groove 1120 from above. Therefore, when pushing the PVC propelling pipe 1505, the rear connection member 1009 of the first connection body 1001 and the front connection member 1208 of the second connection body 1201, or the front connection member 1208 of the second connection body 1201 and the rear connection. The member 1209 can be in close contact with the pressure. On the other hand, when the first connection body 1001 and the second connection body 1201 are pulled out, the front connection member 1008 and the rear connection member 1009 are separated from each other.
[0080]
As shown in FIGS. 65 to 72, the second connection body 1201 has substantially the same structure as that of the first connection body 1001. Omit. However, the difference is that the aforementioned hook grooves 1120 are also provided in the through-round holes 1281 and 1282 of the front connection member 1208. In addition, as shown in FIG. 1 The structure of the joint pipe 1231 is slightly different from the case of FIG. 60, and four annular grooves 1233 are formed on both sides. The projecting lengths of the mud pipe 1203 and the exhaust pipe 1204 are slightly shortened. The rear connection member 1209 is used in a pair with the front connection member 1208 and has a similar structure corresponding to the rear connection member 1009.
[0081]
Further, the rear end portions of the first connection body 1001 and the second connection body 1201 can be detachably connected to the main pushing device 1508 with an attachment 1566 (see FIGS. 99 and 100) interposed therebetween. . The propulsion pipe 1505 can be detachably connected to the main pushing device 1508 via a main body mounting bracket 1606 (see FIG. 99).
[0082]
A procedure for assembling the first connector 1001 will be described. The propulsive force transmission shafts 1005 and 1006, the mud pipe 1003, the exhaust pipe 1004, the first joint-in pipe 1031 and the second joint pipe 1032 are inserted into the corresponding holes of the front connection member 1008 and the rear connection member 1009, respectively. Similarly, it is inserted into the rear connection member 1009 and assembled in the state shown in FIGS. Then, the holding members 1010 and 1011 are attached. The center rotary shaft 1002 is inserted into the hollow portion of the propulsive force transmission shaft 1006. The propulsive force transmission shafts 1005 and 1006, the mud pipe 1003, and the mud pipe 1004 are fixed to and integrated with the front connection member 1008 and the rear connection member 1009 by welding. Thus, the first connection body 1001 is assembled in advance as one connection body. The second connecting body 1201 is also assembled in advance in the same manner.
[0083]
The first connection body 1001 described above is first connected to the rear end portion of the excavator main body 1013, and the second connection body 1201 can be connected to the rear end portion of the first connection body 1001. In addition, the second connecting bodies 1201 can be connected to the rear end of the second connecting body 1201 one after another. That is, the first connection body 1001 is the first intermediate connection body, and the second connection body 1201 is the second and subsequent intermediate connection bodies, both of which are intermediate connection bodies. The first connecting body 1001 has a slightly different structure in order to be connected to the excavator main body 1013.
[0084]
(Structure of the excavator main body 1013 of the muddy water pressurizing small-diameter pipe propulsion device of the second example)
The excavator main body 1013 shown in FIGS. 75 to 98 will be described.
It is divided into a front cutter unit 1300 and a rear in-machine bypass unit 1301, and a sealed-type excavator in-machine mud water bypass device 1401 (FIG. 7) is installed inside the in-machine bypass unit 1301. 9 Is arranged at a position below the central axis. Since this is a sealed type, it can be protected and sealed from external pressure. The casing of the machine main body 1013 is formed by sequentially connecting a blade member 1302, a fixing plate 1303, a first partition 1304, a second partition 1305, an outer tube 1306, and a rear end partition 1307 from the front. . Hereinafter, these cases will be briefly described. In addition, as to how to cut the cross section, the cutting method is appropriately changed for each place in order to show all the parts, and the hatching of the cross sectional view is unnecessarily complicated in this example. The detailed structure will be described below with reference to FIGS.
[0085]
The internal structure of the excavator main body 1013 will be described. At the center of the excavator main body 1013, the central rotation shaft 1312 is rotatably supported by the fixed plate 1303, the first partition 1304, and the second partition 1305. That is, an oil chamber 1313 and an oil chamber 1314 are formed between the central rotating shaft 1312 and the first partition 1304, and an oil supply path 1304g and an oil supply path 1304h (see FIG. 75) communicate with each other. Further, inside the oil chamber 1313, a mechanical seal 1320 and a screw hole (not shown) are provided on the outer periphery of the central rotating shaft 1312. A double-row tapered roller bearing 1322 is provided on the outer periphery of the center rotating shaft 1312 inside the oil chamber 1314. A nut 1323 and a washer 1324 are provided behind the double row tapered roller bearing 1322. On the rear side, a female screw 1325 and an oil seal 1326 are provided. A fixing plate 1327 is fixed to the rear portion of the first partition 1304 with a bolt 1328 so that oil does not leak from the first partition 1304 to the central chamber 1329.
[0086]
The front chamber 1330 is provided with a cutter 1331 fixed to the front end portion of the central rotating shaft 1312, and a pilot pipe fitting 1332 is fixed to the front central portion of the cutter 1331. The pilot pipe attachment 1332 can attach a pilot pipe 1502 and a read head 1502a, which will be described later, and has a structure that prevents the rotation of the central rotating shaft 1312 from being transmitted to the read head 1502a. A spline male portion 1333 is formed at the rear end portion of the central rotating shaft 1312, and the spline female portion 1335 of the central rotating shaft 1334 is splined in the axial direction. An oilless metal 1336 as a bearing is disposed on the outer peripheral portion of the spline female portion 1335 and the inner peripheral portion of the second partition wall 1305. The rear end portion of the oilless metal 1336 is pressed by a flange 1337 and receives the thrust of the central rotating shaft 1334. A space between the fixed plate 1303 and the first partition 1304 is sealed with an O-ring 1338. The rear end portion of the first partition 1304 and the front end portion of the second partition 1305 are sealed with an O-ring 1339. Further, the O-ring 1340 is sealed between the rear end inner peripheral portion of the first partition 1304 and the outer peripheral portion of the fixing plate 1327. Further, the outer peripheral portion of the rear end of the second partition wall 1305 and the inner peripheral portion of the front end of the outer tube 1306 are sealed with an O-ring 1341.
[0087]
A spline female portion 1342 is formed at the rear end portion of the center rotation shaft 1334, and can be splined with a male spline portion 1022 (see FIGS. 55 and 56) formed at the front end portion of the center rotation shaft 1002. Oiles metal 1344 as a bearing is disposed on the outer peripheral portion of the central rotating shaft 1334 and the inner peripheral portion of the rear end partition wall 1307. The front end portion of the oilless metal 1344 is pressed by a flange 1345 to receive the thrust of the rear end partition wall 1307. A relatively wide rear chamber 1349 is formed between the second partition 1305, the outer tube 1306, and the rear end partition 1307. In the rear chamber 1349, the excavator mud water bypass device 1401 (see FIG. 79) is provided below the central rotating shaft 1334. A packing 1343 is fitted on the inner peripheral surface of the rear end of the rear end partition wall 1307. A space between the outer tube 1306 and the rear end partition wall 1307 is sealed with an O-ring 1346.
[0088]
A mud feeding system 1350 and a mud draining system 1370 (see FIG. 75) are formed side by side below the center rotating shaft 1312 and the center rotating shaft 1334. The mud feeding system 1350 and the mud draining system 1370 are a pair of left and right in parallel and are continuously formed in the axial direction from the fixed plate 1303 to the rear end partition wall 1307, and have a similar structure. . Therefore, only the mud feed system 1350 will be described, and the description of the mud feed system 1350 will be applied mutatis mutandis for the mud discharge system 1370, and description thereof will be omitted. This mud feed system 1350 is for sending muddy water from right to left in FIG. 75 to the front chamber 1330. The front end of the mud pipe 1351 is sealed with a packing 1352. Further, a mud pipe 1353 is connected to the mud pipe 1351 (the same applies to the mud pipe 1363 (see FIG. 92)). The mud pipe 1353 is inserted into the front end of the muddy water bypass block 1403 and sealed with a packing 1356. A bent mud pipe 1354 (similarly, a mud pipe 1355 (see FIG. 92)) is inserted into the rear end of the mud water bypass block 1403 and sealed with a packing 1357, and the rear end of the mud pipe 1354 is a rear partition wall. 1307. The mud pipe 1354 and the mud pipe 1355 are bent and the flow path of the mud pipe is deviated downward in the mud water bypass inside the excavator while avoiding the central rotating shaft 1334 in the small diameter excavator main body 1013. This is because the device 1401 must be arranged. The mud pipe 1003 and the mud pipe 1004 (refer to FIG. 55) can be inserted into the feed / mud through-holes formed in the lower part of the rear partition wall 1307, respectively. The mud discharge system 1370 discharges the mud water supplied from the mud supply system 1350 and the earth and sand excavated by the cutter 1331, and flows the muddy water from the left to the right in FIG. A check valve (not shown) is provided, and a high-concentration liquid material containing a high amount of filling material is supplied from the sliding material discharge port to form a mud film on the ground around the outer periphery of the propelling pipe 1505. It is for stabilizing. As an example of the size of the excavator main body 1013, the length is 902 mm and the diameter is 242 mm.
[0089]
A mud pressurizing small-diameter pipe propulsion device shown in FIG. 79 includes an in-machine mud water bypass device 1401 having a rectangular mud water bypass block 1403 provided therein with a chamber 1402 communicating with a mud feed system 1350 and a waste mud system 1370. By being in a parallel position parallel to the axial direction (feeding / draining mud direction) of the excavator main body 1013, the mud feeding system 1350 and the discharging mud system 1370 can be separated and the mud can be recirculated, and orthogonal to the axial direction. In order to be able to bypass the muddy water from the mud feed system 1350 to the waste mud system 1370 by being in the position, it is a plate-like oval standing inside the chamber 1402 so that it can be rotated 90 degrees alternately to the orthogonal position or the parallel position. The valve body 1405 having a shape and the center of the valve body 1405 are fixed in the direction perpendicular to the axial direction of the muddy water bypass block 1403, and the muddy water bypass block 1 03, a rotating shaft 1406 standing upright in a rotatable manner, a lever 1407 fixed to the rotating shaft 1406, and a hydraulic cylinder 1408 coupled to the lever 1407 and rotating it within a range of 90 degrees. And a stopper 1409 that restricts the pivoting movement of the lever 1407 and realizes precise pivoting of the valve body 1405. The muddy water bypass block 1403 has two holes (an inlet mud pipe insertion port 1414 and an outlet mud pipe insertion port 1415) at its rear end and two holes (an outlet mud pipe insertion port at its front end). 1416, inlet drain pipe outlet 1417) and are in communication with chamber 1402. A valve body 1405 rotates in the chamber 1402 to switch between a passing state and a bypass state. When viewed in plan along the axial direction, in the parallel position (passing state), the valve body 1405 divides the chamber 1402 into two left and right chambers, while in the orthogonal position (bypass state), the valve body 1405 separates the chamber 1402. It can be divided into two front and rear chambers. Therefore, the mud water bypass can be easily executed by the single valve body 1405, whereby the structure of the mud water bypass device 1401 in the excavator is simplified and the miniaturization is realized.
[0090]
The muddy water bypass block 1403 is an alternative to either sending muddy water and discharging muddy water and earth and sand (hereinafter referred to as a passing state), or blocking the passing state (hereinafter referred to as a bypass state). It has a function as a gate that can be switched between. The passing state is necessary for supplying muddy water to the cutting blade surface accompanying the propulsion of the propulsion pipe 1505 and discharging muddy water and earth and sand from the cutting blade surface, and the bypass state is the addition of the propelling pipe 1505 and the like. It is necessary to prevent the blockage of the pipeline and the collapse of the natural ground at the time of connection. The end portions of the above-described mud feeding pipe 1353 and mud feeding pipe 1354 can be inserted into the inlet mud feeding pipe insertion port 1414 and the outlet mud feeding pipe insertion port 1416, respectively. Each can be inserted into a drainage pipe insertion port 1415 and an inlet drainage pipe insertion port 1417. These inlet mud pipe inlet 1414 through inlet mud pipe inlet 1417 are all in communication with chamber 1402.
[0091]
As shown in FIGS. 75 and 79, pressure transmitters 1418 and 1419 (see FIG. 79) are erected on the upper portions of the pipes inserted into the inlet mud pipe inlet 1414 and the outlet mud pipe inlet 1416, respectively. A current indicating the pressure of muddy water is transmitted to the outside through the extending lightweight electric wires 1418a and 1419a (see FIG. 75) through the through holes 1081 and 1082 and the like. Based on the detection signals from the pressure transmitters 1418 and 1419 (see FIG. 79), when the mud water bypass device 1401 in the excavator is in the muddy water passage state, by controlling the driving force of the main pushing device 1508 (see FIG. 99) When the propulsion speed of the excavator main body 1013 is controlled or when the mud water bypass device 1401 in the excavator is in the muddy water bypass state, the inner pipe pressure on the back side and the front pressure (cutting blade pressure) of the muddy water bypass block 1403 This is because the mud-water bypass device 1401 in the excavator is switched to the passing state at the time when the balance is achieved, and the risk of ground collapse and blockage in the pipe due to the shock (shock) of the mud is avoided. That is, the detected values of the pressure transmitters 1418 and 1419 provide a guide for measuring the switching timing of the muddy water bypass block 1403. The lightweight hydraulic hose 1408a and the lightweight electrical wires 1418a and 1419a are not connected to each of the first connecting body 1001 and the second connecting body 1201, but are bundled to some extent, and are connected to the second connecting body. For the 10 connections 1201, the connection work is performed once, thereby reducing the amount of work.
[0092]
The operation of the excavator mud water bypass device 1401 will be described. As shown in FIG. 79, in the passing state of muddy water, the valve body 1405 is arranged in a parallel position parallel to the axial direction, and mud water from the inlet mud pipe insertion port 1414 is passed through the chamber 1402 to the outlet mud pipe difference. Send to slot 1416. Further, the muddy water containing earth and sand from the inlet mud pipe insertion port 1417 is sent to the outlet mud pipe insertion port 1415 via the chamber 1402.
[0093]
On the other hand, in the bypass state, the hydraulic cylinder 1408 is driven, the piston rod 1420 and the extension rod 1421 are advanced, and the lever 1407 is rotated 90 degrees. Then, the valve body 1405 is in a position orthogonal to the axial direction, and the muddy water from the inlet mud pipe insertion port 1414 is sent to the chamber 1402, but the muddy water conveyance direction is changed by 180 degrees by the valve body 1405, and the outlet mud pipe difference It is sent to the inlet 1415.
[0094]
In this way, the mud water passage device and the bypass state are alternately switched by the mud water bypass device 1401 in the excavator so as to avoid the collapse of the earth and sand by receiving the earth and sand pressure during the connection work of the propulsion pipe 1505 and the like. This is to avoid blockage of earth and sand in the pipe. In other words, the propelling pipe 1505 is propelled with the valve body 1405 parallel to the axial direction and the muddy water is passed through, and after one propulsion, the mud is bypassed with the valve body 1405 positioned perpendicular to the axial direction. Switch to, make the mud water shortcut (short circuit), flush the clogged sediment and empty the pipe. After that, the propulsion pipe 1505, the first connection body 1001, and the second connection body 1201 are disconnected and connected. When the connection work is completed and propulsion is ready, the pipe pressure at the rear of the muddy water bypass block 1403 (value of the pressure transmitter 1419) and the pressure at the front side of the muddy water bypass block 1403 (cutting blade pressure: value of the pressure transmitter 1418) ), The gate is opened when the balance is achieved, so that the impact of the mud can be mitigated, and the risk of natural collapse and pipe blockage can be avoided. The gate is closed (the valve body 1405 is orthogonal to the axial direction of the excavator main body 1013) every connection operation. Details will be described in the operation.
[0095]
The excavator main body 1013 shown in FIGS. 75 to 98 is slightly changed from the excavator main body 4 shown in FIG. 36, and the changes and supplementary matters will be described below. As shown in FIGS. 80 and 81, the cutter unit 1300 has a flange 1710 that is detachably fixed to the central rotating shaft 1312 with a bolt 1705, and a surrounding sediment flow around the flange 1710 is stirred to prevent clogging. Three reinforcing ribs 1720, a cone 1730 having a conical surface detachably fixed by a bolt 1725 in front of the flange 1710, and a front surface of the cone 1730 detachably fixed by a bolt 1735 and provided in the circumferential direction. A face plate 1740 having three inflow holes 1746, a plurality of (six) cemented carbide bits 1750 provided on the face plate 1740, and three stirring ribs 1770 connecting the cone 1730 and the face plate 1740. It is comprised from. A pilot pipe fitting 1332 made of a rotary joint for attaching the pilot pipe 1502 to the front side of the cone 1730 is screwed.
[0096]
As shown in FIGS. 82 (a), (b), and 83, the face plate 1740 is formed in a round plate shape, and a round hole 1741 for fitting the tip of the cone 1730 at the center and six screws into which the bolt 1735 is screwed. The hole 1742 is constituted by the inflow hole 1746 described above. 84, the bit 1750 shown in FIG. 84 has tapered surfaces 1751 to 1754 on the left and right sides, parallel surfaces 1756 and 1757 on the front and rear sides, and a recess 1758 on the center of the upper surface. When viewed from the front, parallel surfaces 1759a and 1759b are formed vertically. Further, notches 1750a and 1750b are formed in the left and right lower regions.
[0097]
85 (a) and 85 (b), the stirring rib 1770 is formed in a trumpet shape when viewed from the front, and is formed in a rectangular shape when viewed from the side.
[0098]
The cone 1730 shown in FIGS. 86 to 88 is attached to a pilot pipe. Ingredients In order to attach 1332, etc., there are attachment holes 1731 formed in the center, six bolt attachment holes 1732 arranged radially, and reinforcing ribs 1720 extending radially outward from the rear periphery to the outside. I have.
[0099]
A flange 1710 shown in FIGS. 89 (a) and 89 (b) attaches a fitting groove 1711 for fitting a reinforcing rib 1720, a screw hole 1712 for screwing a bolt 1725, a central rotating shaft 1312 and a cone 1730. Therefore, the mounting hole 1713 is formed in the central portion.
The blade edge member 1302 shown in FIGS. 90 and 91 has the same structure as that of the first example, but an overlay 1761 is welded to the inner tapered surface 1760.
[0100]
92 to 98, the pressure transmitter pedestal 1418c (see FIG. 93) is fixed to the connecting pipe 1422, and the connecting pipe 1424 (see FIG. 94) is not provided with the pressure transmitter pedestal. An elbow portion 1308 in which the mud feeding hole and the mud discharging hole are cut is welded to a lower part in front of the rear partition 1307.
[0101]
Changes in the attachment 1566 and the like will be described with reference to FIGS. This attachment 1566 has a structure that can be detachably connected to the rear end portions of the excavator main body 1013, the first connecting body 1001, and the second connecting body 1201. FIG. 99 shows an example of connection with the second connector 1201. Since the structure is substantially the same as that of the attachment 366 of the first example, different points and supplementary items will be mainly described. The mud pipe 1567 and the mud pipe 1568 extend upward. Moreover, the 2nd connection body 1201 is connected with the connection hook 1110 so that attachment or detachment is possible. Further, the distance between the pressing member 1604 and the main body mounting bracket 1606 is further narrowed.
[0102]
(Effect of the second example)
The effect of the mud water bypass device in the excavator in the second example is substantially the same as that of the mud bypass device in the excavator in the first example, and the effect of the first example applies mutatis mutandis.
However, there are the following effects as the unique effects of the second example.
(G) The connection hook 1110 has an effect of facilitating the connection work of the first connection body 1001, the second connection body 1201, and the like.
(H) The face plate 1740 is reinforced by the reinforcing ribs 1720 of the cutter unit 1300, and the atmosphere inside the cutter unit 1300 can be forcibly stirred to effectively prevent clogging of earth and sand.
(I) The center rotation shaft 1002 of the first connection body 1001 and the center rotation shaft 1202 of the second connection body 1201 are made free, and the firm fit as in the first example is greatly relaxed.
(J) The total weight of the first connection body 1001 and the second connection body 1201 is about 60 kg, such as the front connection members 1008, 1208 and the rear connection members 1009, 1209 are thinned and the holding members 1010, 1011 are small. Further, the weight was reduced to approximately 30 to 35 kg.
(K) Since the O-ring 1035 is fitted to the outside of the first joint pipe 1031 and the second joint pipe 1032, the inner processing is changed to the outer processing, the manufacturing cost is reduced, and the connection work is simplified. In addition, the fitting of the O-ring 1035 can be visually recognized to improve the reliability.
(L) In the excavator main body 1013, when the drainage pipe 1034 is bent to change the flow path, it is easy to obtain the accuracy of alignment between the center and the center. That is, welding was performed after opening a hole, but after welding, cutting was performed so as to dig a tunnel from both sides, and the hole was penetrated.
[0103]
(Third example mud water bypass device in excavator)
The mud-water bypass device in the excavator in the third example has a slightly changed configuration and a surrounding configuration.
First, the muddy water pressurizing connection body will be described with reference to FIGS. The muddy water pressurizing and propelling connectors 3001 and 3201 are generally set to the same length as the second example in terms of dimensions, but the spline part of the second example has a larger diameter, and accordingly the peripheral part is Change of design, creation of work room to improve connection workability, change to connection with bolts and nuts instead of connection hook, position of mud feed system 3350 and waste mud system 3370 This is a partial modification of the configuration, such as replacement (reversal of arrangement). Therefore, the configuration common to the second example is only illustrated and will be described focusing on the different configuration. The corresponding part number is in the 3000s (generally with the number 2000 added). Further, regarding the method of cutting the cross section, the cutting method is appropriately changed for each place in order to show all the parts, and the hatching of the cross sectional view is unnecessarily complicated in this example.
[0104]
First, the 1st connection body 3001 is demonstrated with reference to FIGS. 105-108. Generally speaking, the first connecting body 3001 is an inner casing housed in the rear part of the excavator main body 3013, and the length thereof is greatly reduced to reduce the size. The first example and the second example are different. The first connection body 3001 includes a front connection member 3008 and a rear connection member 3009 at the front end portion and the rear end portion, respectively, and a through hole 3083 for receiving the spline female portion 3342 of the center rotation shaft 3334 is provided at the center axis thereof. In addition, through holes 3084 and 3085 are provided in the obliquely lower left and right sides so that cylindrical mud feeding pipes 3203 and mud pipes 3204 can be inserted and fixed in the axial direction. In the center of the left and right, there are through holes 3086 having an oval shape provided in the upper part for accommodating through holes 3081 and 3082 whose side surfaces through which the bolts 3090 pass are opened, lightweight hydraulic hoses 3408a, lightweight electric wires 3418a and 3419a, and the like. Provided. Further, a plurality of bolts 3380 are screwed into the bolt mounting holes 3088a to 3088e, and can be connected to a rear end partition wall 3307 of an excavator main body 3013 described later. Bolt receiving grooves 3120 (see FIG. 109) are formed at the lower portions of the through holes 3081 and 3082 of the rear connection member 3009, and square keys 3122 are formed on both sides thereof to tighten the bolt 3090. The nut 3123 is prevented from spinning idle. The bolts 3090 are respectively screwed into the screw holes 3309 (see FIG. 118).
[0105]
As shown in FIG. 105, the first joint pipe 3031 is inserted into the mud feed through round hole 3307d, the drain mud through round hole 3307e, the mud feed pipe 3003, and the mud pipe 3004 to connect them. The second joint pipe 3032 connects the mud feed through round hole 3307d, the drain mud through round hole 3307e, the mud feed pipe 3203 of the second connector 3201, and the mud pipe 3204 (see FIG. 109). . The first joint pipe 3031 and the second joint pipe 3032 are respectively the first joint pipe 1031 (see FIG. 60) and the second joint pipe 1231 (see FIG. 71) of the second connector 1201 of the second example described above. The description is applied mutatis mutandis because the structure is the same as that of the reference.
[0106]
In addition, since the 1st connection body 3001 is short, the tubular thrust transmission shaft 3005 is provided in the outer periphery. If necessary, a propulsive force transmission shaft 3006 may be provided at the center so as to wrap the spline connection (see FIG. 107). In addition, since the second connection body 3201 and the propulsion pipe 3505 are substantially the same length, and the propulsion pipe 3505 covers the first connection body 3001, the second connection body is connected from the rear end of the propulsion pipe 3505 during connection work. 3201 backward connection Element 3209 is exposed, and connection workability is improved.
[0107]
Next, the second connector 3201 will be described with reference to FIGS. 109 to 112. Generally speaking, the central rotation axis 320 2 Since the spline part of the above has a large diameter (particularly a female spline part), the intervals between the mud pipe 3203, the exhaust pipe 3204, and the propulsive force transmission shaft 3206 are narrowed, making it difficult to hold them. The lengths of the front connecting member 3208 and the rear connecting member 3209 are similarly increased in the axial direction so as to have a horizontally long shape as a whole, and are held at a portion where the diameter of the central rotary tube 3221 is narrow. A locating pin 3228 is provided at the front end of the male spline portion 3222 to facilitate fitting. In order to improve workability, design changes such as providing side openings 3281, 3282 as work windows, lightweight hydraulic hoses 3408a, and upper openings 3286 for accommodating lightweight electric wires 3418a, 3419a, etc. It is.
[0108]
That is, the second connection body 3201 includes a front connection member 3208 and a rear connection member 3209 having a thickness (width) in the axial direction, as shown in FIGS. 110 and 111, at the front end portion and the rear end portion, respectively. The central axis is provided with a circular thrust transmission shaft 3206 for holding the central rotation shaft 3202 (see FIG. 111), and a cylindrical mud feed pipe 3203 and a waste mud pipe 3204 are connected to the front connecting member obliquely downward from the left and right. 3208 and the rear connection member 3209 are fixed in the axial direction. In addition, a small piece of a friction prevention sheet (not shown, equivalent to a wiping slip) is affixed to the lower peripheral portion of the front connection member 3208 with a double-sided adhesive tape so as not to be rubbed when pulled out. Further, as shown in FIG. 111, a plate-like holding member 3210 is provided at the rear end of the front connection member 3208, and a first working chamber 3212 is formed therein, and similarly, the plate-like holding member 3211 is connected rearward. A second work chamber 3213 is formed inside the member 3209 at the front end. The first working chamber 3212 and the second working chamber 3213 are open on the side surfaces and communicate with the outside so that tools and the like can be inserted.
[0109]
109 to 112, a male spline portion 3222 of the central rotating shaft 3202; female The spline portion 3225 has a larger diameter than that of the second example and is accommodated inside the propulsive force transmission shaft 3206 and is almost free, but can be locked by a stop plate 3215. That is, the central rotating shaft 3202 is pulled out rearward in the axial direction, but is restricted from moving forward in the axial direction. As shown in FIG. 112, the stop plate 3215 is provided with a through hole 3216 through which the central rotation shaft 3202 passes, and is fixed to the right side surface of the holding member 3211 provided at the four corners by bolts 3217 so as to be detachable. As a result, the trouble at the time of pulling out can be solved and the error accumulation of spline fitting does not occur. As shown in FIG. 109, the spline tip of the male spline portion 3222 is tapered to facilitate fitting, and a locating pin 3228 is formed on the front side of the male spline portion 3222. The second joint pipe 3232 is used to connect the mud pipe 3203 and the exhaust pipe 3204, but this is the same structure as the second joint pipe 1231 of the second example (see FIG. 71), and the description is applied mutatis mutandis. To do. The first joint pipe 3031 is not used. The number of propulsive force transmission shafts 3206 in the central portion is one, and is reduced by one from the second example.
[0110]
The front connection member 3208 will be described with reference to FIGS. 109 and 110. Side openings 3281 and 3282 (see FIG. 112) whose side surfaces are open on both sides of the upper portion of the front connection member 3208 (see FIG. 112), a through-round hole 3283 in the center, a through-round hole 3284 on the lower left side, and a through-round hole 3285 on the lower right side. An upper opening 3286 is formed at the upper center. The side openings 3281 and 3282 are provided for connection work.
The central rotating shaft 3202 can be accommodated inside a tubular propulsive force transmission shaft 3206. The propulsive force transmission shaft 3206 can be fixed by being inserted into the through-round hole 3283 of the front connection member 3208 and the through-round hole 3283 of the rear connection member 3209.
[0111]
The elements of the rear connection member 3209 (see FIG. 110) having the same structure as that of the front connection member 3208 are applied mutatis mutandis to the description of the front connection member 3208. To do. When the central rotary tube 3221 is removed, the front connection member 3208 is viewed from the side. Promotion Although the force transmission shaft 3206 can be seen, the second working chamber 3213 of the rear connection member can be seen from the side. Promotion The force transmission shaft 3206 is not visible and communicates with the other side in a space.
As shown in FIG. 111, the second connection bodies 3201 can be detachably connected with bolts 3290 and nuts 3323.
A drain hole 3218 is provided on the bottom surface of the second connector 3201. Also The figure 111 hatching is a welding part.
[0112]
Further, the rear end portions of the first connection body 3001 and the second connection body 3201 are attached to the main pressing device 3508 (see FIG. 123) with an attachment 3566 (FIGS. 123 to 12). 5 Etc.) can be detachably connected. The propulsion pipe 3505 can be detachably connected to the main pushing device 3508 via a main body mounting bracket 3606 (see FIG. 125).
[0113]
The assembly procedure of the first connector 3001 will be described with reference to FIGS.
The first joint pipe 3031 is inserted and welded into the mud feed through round hole 3307d, the drain mud through round hole 3307e, the mud feed pipe 3003, and the mud pipe 3004. The second joint pipe 3032 connects the mud feed through round hole 3307d, the exhaust mud through round hole 3307e, the mud feed pipe 3203 of the second connector 3201, and the mud pipe 3204. The first connecting body 3001 thus assembled is screwed into a screw hole (not shown) of the rear end partition 3307 by passing the bolt 3090 through the through holes 3081 and 3082. A plurality of bolts 3380 are screwed into the bolt mounting holes 3088a to 3088e and connected to the rear end partition 3307 of the excavator main body 3013. The mud pipe 3203 and the exhaust pipe 3204 are inserted into the through holes 3084 and 3085 and welded. Further, the male spline portion 3222 of the second connecting body 3201 is inserted into the spline female portion 3342 of the central rotating shaft 3334 to connect the second connecting body 3201, and the bolt 3090 temporarily tightening the nut 3123 is dropped into the bolt receiving groove 3120, and the bolt Tighten 3090.
The assembly procedure of the second connector 3201 will be described with reference to FIGS.
The mud pipe 3203 and the exhaust pipe 3204 are inserted into the front connection member 3208 and the rear connection member 3209 and welded. Similarly, the propulsive force transmission shaft 3206 is welded. A small piece of an anti-friction sheet (not shown, a product equivalent to a brace slip) is attached to the lower surface periphery of the front connection member 3208 and the rear connection member 3209 with a double-sided adhesive tape. Note that the mud pipe 3203 and the exhaust mud pipe 3204 are not necessarily welded, and may have play.
[0114]
The first connection body 3001 described above is installed from the beginning at the rear end portion of the excavator main body 3013 as shown in FIG. 105. The second connection body 3201 is installed at the rear end portion of the first connection body 3001. Can be connected, and the second connector 3201 can be connected to the rear end of the second connector 3201 one after another. Further, the connection between the first connection body 3001 and the second connection body 3201 or the connection between the second connection bodies 3201 is detachable with bolts and nuts. Therefore, in the case of connecting with the connecting hook of the second example, it is necessary to pull or pull out at the time of difficult construction, and loosening occurs as a whole from the clearance for dropping, but this was solved in the third example. Is.
[0115]
113 to 122 generally have the same structure as the excavator main body 1013 of the second example, and therefore, the numbers are assumed to be in the 3000 range, and the description is applied mutatis mutandis. The surrounding configuration will also be described focusing on the different configurations of the muddy water bypass device.
First, as shown in FIG. 116, a connecting surface between the cone 3730 and the flange 3710 or a connecting surface between the flange 3710 and the front end portion of the central rotating shaft 3312 is provided with a tapered surface that is reduced in diameter in the axial direction. It is. As a result, the face plate 3740 is transmitted through vibration in the gravel layer and becomes loose as it is, but if it is tapered, zero clearance can be achieved, and the occurrence of looseness is suppressed as much as possible. Moreover, it becomes strong in pushing. Desorption is easy.
As shown in FIGS. 105, 117 and the like, a lubricant injection hose 3410, a lightweight hydraulic hose 3408a and the like are disposed through the through hole 3086.
The positions of the mud supply system 3350 and the exhaust mud system 3370 are opposite to those in the above example (see FIG. 122).
Further, as shown in FIG. 122, pressure transmitters 3418 and 3419 are respectively disposed at the inlet and outlet of the mud passage of the mower bypass device 3401 in the mooring machine. That is, in the above-described normal state, the pressure on the cutting edge side can be measured by the pressure transmitter 3418, and in the bypass state, the bypass pressure can be measured by the pressure transmitter 3419.
In addition, the arrangement of the hydraulic cylinder 3408 of the mower bypass mud water bypass device 3401 is changed. Thereby, the movement of the hydraulic cylinder 3408 becomes smooth. That is, as shown in FIG. 122, the position indicated by the solid line where the offset (approximately 15 degrees oblique) is set indicates the bypass state (the valve body is perpendicular to the flow and closed), and the initial position indicated by the dotted line is the normal state. (The valve body is parallel to the flow and opened). In general, the pushing force of the hydraulic cylinder 3408 is strong and the pullback force is weak, and the design is optimal in consideration of the flow direction of the sending and discharging mud.
Then, a reed switch 3430 is attached to the hydraulic cylinder 3408, and green and red lamps are provided on the central operation panel 310 (see FIG. 27) to blink, so that the opening and closing of the hydraulic cylinder 3408 can be confirmed. Accordingly, even if the pressure transmitter 3419 fails, the reed switch 3430 can be used instead.
The second partition 3305 shown in FIG. 119 is formed in a lower portion and arranged side by side in a mud feed through round hole 3305d and a waste mud through round hole 3305e, a lightweight hydraulic hose 3408a, lightweight electrical wires 3418a and 3419a, and a lubricant supply pipe. (Illustration omitted) It is comprised from the through-hole 3305f which lets a etc. pass, the hydraulic cylinder arrangement | positioning hole 3305j, and the extraction bolt 3305m. Reference numeral 3305n denotes a connecting bolt. 118, 3319 and 3380 are also bolts.
[0116]
Changes in the attachment 3566 and the like will be described with reference to FIGS. 123 to 127. This attachment 3566 can be detachably connected to the rear ends of the first connection body 3001 and the second connection body 3201, and has a structure capable of propelling them. FIG. 123 shows a connection example with the second connection body 3201. The attachment 3566 has a male spline part 3601 disposed at the center of (1) and a central through-round hole 3602 disposed at the front part of the male spline part 3601 and through which the mud pipe 3567 can pass. And a plate-like first presser member 3604 provided with a feed / drainage pipe connection member 3603 to which each of the drainage pipes 3568 can be connected, and (3) a center disposed behind the male spline part 3601 and penetrating therethrough A plate-shaped main body mounting bracket 3606 provided with a through-round hole 3605, and (4) a rear end portion of an insertion shaft 3620 that presses the propelling tube 3505 and is formed with a male screw on the outer periphery is a hole of the first presser member 3604 A plate-shaped horseshoe-shaped second pusher that is detachable by an insertion structure to be inserted into 3660 and includes a screw member 3630 for position adjustment. A member 3609, ▲ 5 ▼ the first pressing member 3604, thereby connecting the body mounting bracket 3606, and a three round shaft 3607 Metropolitan formed with external threads at its outer periphery. Thereby, the rotational power from the main pushing device 3508 is transmitted to the central rotational shaft 3202 via the male spline portion 3601, and the propulsive force is also transmitted to the excavator main body 3013 by the propulsive force transmission shaft 3206. Yes. Further, it is possible to prevent the propelling pipe 3505 from being disconnected or displaced. The first pressing member 3604, the mud pipe 3567, and the mud pipe 3568 are connected by welding with a connection plate 3640. The first presser member 3604 has oval holes 3650 (see FIG. 124) at three locations, and the position can be adjusted in the circumferential direction.
[0117]
FIG. 128 shows a male spline portion 3601 attached to the main pushing device 3508 and serving as a drive shaft. The male spline portion 3601 includes a cylindrical casing 3810, a front spring guide 3820 that can be moved back and forth accommodated in the casing 3810, a cover 3835 that is fixed to the rear end portion of the casing 3810 with a bolt 3830, and a casing. A rear spring guide 3840 disposed at the rear portion of 3810 and a coil spring 3850 fitted therein are provided. The free screw 3870 Direction The bearing nut 3880 is fixed to the rear portion through the center hole 3860 of the spring guide 3840. A central shaft 3485 is fixed to the front end portion of the free screw 3870. A head 3900 is fixed to a front end portion of the central shaft 3485 with a front spring guide 3820 and a urethane sheet 3890 interposed therebetween. The head 3900 is provided with a locating pin 3910 at the front end, followed by a male spline 3920. In addition, a guide plate 3930 into which the head 3900 is inserted and slidable is fixed to the casing 3810 with bolts 3940.
[0118]
The aforementioned male spline 3920 is fitted to the female spline 3225 of the second connector 3201 (see FIG. 123). In this case, there is a case where it can be smoothly fitted, but when the position is not present, the coil spring 3850 is retracted, and the head 3900 is rotated by the function of the locate pin 3910 so that the head 3900 can be smoothly fitted. .
[0119]
(Effect of the third example)
The operational effects of the muddy water pressure-promoting connection body of the third example are substantially the same as those of the muddy water pressure-promoting connection body of the first and second examples, and the description of the common effects is omitted. However, in addition to the effects of the first example and the second example, there are the following effects.
(M) A taper surface with a diameter reduced toward the top in the axial direction is employed on the connection surface between the cone 3730 and the flange 3710 of the cutter unit 3300 or the connection surface between the cone 3730 and the face plate 3740 to prevent loosening.
(N) Stock The Since the plate 3215 is detachably provided, the clearance and error accumulation of the central rotating shaft 3202 can be reduced to about 50 mm, and replacement is facilitated.
(O) Since the spline portion of the central rotary tube 3221 has a large diameter, the strength is improved and damage to the connecting portion can be prevented.
(P) Since there are the bolt 3090, the nut 3123, and the key 3122 (rotation stop), the bolt and nut can be attached more easily.
(Q) Since only the lightweight electrical wires 3418a and 3419a, the lightweight hydraulic hose 3408a, etc. are dropped into the upper opening 3286 from above, the wiring work thereof becomes extremely simple.
(R) Since the offset is provided in the hydraulic cylinder 3408, the opening / closing resistance of the valve body is reduced.
(S) Since the reed switch 3430 is provided in the hydraulic cylinder 3408, the operation of the hydraulic cylinder 3408 can be monitored, and the open / closed state can be grasped even if the pressure transmitters 3418 and 3419 break down.
(T) Since the first connection body 3001 is incorporated in the mower main body 3013 in advance, the connection work of the connection body is simplified. Further, since the propelling pipe 3505 can be put into the rear part of the mowing machine main body 3013 and sealed, the sealing property can be secured, and the second connecting body 3201 can be exposed behind the propelling pipe 3505, so that it can be exposed. The connection work of the rear part of the second connector 3201 is facilitated (see FIG. 105).
(U) Since the front connecting member 3208 and the rear connecting member 3209 wrap the mud pipe 3203 and the mud pipe 3204, they can be prevented from being damaged during transportation.
[0120]
In the third example, the applicable pipe types are a vinyl chloride pipe, a steel pipe, a ceramic pipe, a fume pipe, a regicon pipe, and the like. The applicable pipe diameter is approximately φ150 to φ300 mm, the effective length is 800 to 1,000 mm, and the soil is a stagnant sand layer, a gravel layer, a clay layer, a silt layer, or the like. N value is N5 to N20, water pressure is P = 0.6 to 0.7Kg / cm ² , Permeability coefficient K = 10 ^-2 / Sec or more, less than 20% at maximum gravel diameter of 30mm, gravel rate less than 20%, maximum propulsion distance of 60m to 100m, propulsion force of 30ton, rotational force of 300kg / m, excavator body (lead conductor) weight of 200kg (φ200mm) is there. As an example of construction, the diameter of the reach shaft 385 (see FIG. 53) is φ900 mm, the diameter of the start shaft 304 (see FIG. 53) is φ1500 mm, and the like.
[0121]
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and many technical changes are made without departing from the technical idea of the present invention. Of course you can get.
[0122]
【The invention's effect】
According to invention of Claim 1 thru | or 7, simplification of the structure of a bypass device, start from a small shaft, and simplification of start work can be made possible.
[Brief description of the drawings]
FIG. 1 is a front view of a muddy water bypass block of a shaft bypass device according to a first embodiment of the present invention.
FIG. 2 is a plan view of a muddy water bypass block.
FIG. 3 is a right side view of the muddy water bypass block.
4 is a cross-sectional view of the mud bypass block taken along line AA in FIG.
5A is a front view of the upper main body, and FIG. 5B is a cross-sectional view showing the upper main body cut along the line BB in FIG. 6;
FIG. 6 is a plan view of the upper main body.
FIG. 7 is a right side view of the upper body.
8A is a front view of the lower main body, and FIG. 8B is a cross-sectional view showing the lower main body cut along the line CC in FIG. 9;
FIG. 9 is a plan view of the lower main body.
10A is a right side view of the lower main body, and FIG. 10B is a cross-sectional view of the lower main body taken along line DD in FIG.
11A is a front view of the valve body, FIG. 11B is a plan view thereof, and FIG. 11C is a right side view thereof.
12A is a front view of a rotating shaft, FIG. 12B is a plan view thereof, FIG. 12C is a bottom view thereof, and FIG. 12D is a rotating shaft along the line EE in FIG. It is sectional drawing which cuts and shows.
13A is a front view of a lever, FIG. 13B is a rear view thereof, FIG. 13C is a plan view thereof, and FIG. 13D is a right side view thereof;
14A is a front view of the stopper, FIG. 14B is a plan view thereof, and FIG. 14C is a right side view thereof.
15A is a front view of the bearing plate, FIG. 15B is a plan view thereof, and FIG. 15C is a cross-sectional view of the bearing plate taken along line FF in FIG. 15B.
FIG. 16 is a front view of a muddy water bypass block (passing state) of the shaft bypass device of the second embodiment.
FIG. 17 is a plan view of a muddy water bypass block (passing state) of the vertical shaft bypass device.
FIG. 18 is a plan view of the mud water bypass block (bypass state).
FIG. 19 is a right side view of a muddy water bypass block (passing state) of the vertical shaft bypass device.
20A is a front view of the main body, FIG. 20B is a cross-sectional front view of the main body taken along line II in FIG. 18, and FIG. 20C is a main body along the line JJ in FIG. FIG.
21 is a cross-sectional plan view showing the main body cut along the line KK in FIG. 16;
22A is a front view of the lid, FIG. 22B is a plan view thereof, and FIG. 22C is a sectional front view showing the lid cut along the line LL in FIG. 22B.
23A is a front view of a plastic valve, FIG. 23B is a plan view thereof, FIG. 23C is a cross-sectional plan view showing the plastic valve cut along the line MM in FIG. d) is a right side view of the plastic valve.
24A is a front view of a metal valve, FIG. 24B is a plan view of the metal valve, and FIG. 24C is a cross-sectional plan view showing the metal valve cut along the line NN in FIG. d) is a right side view of the metal valve.
FIG. 25 is a plan view showing the shaft bypass device (muddy water bypass state).
FIG. 26 is a plan view showing the shaft bypass device (muddy water passage state).
FIG. 27 is an overall explanatory view of a muddy water pressurizing small-diameter pipe propulsion device to which a shaft bypass device arranged in a starting shaft is applied.
FIG. 28 is a right side view of the shaft bypass device of the third embodiment.
FIG. 29 is a longitudinal sectional view of the same center.
FIG. 30 is a plan view showing a connection state of the vertical shaft bypass device.
FIG. 31 is an overall explanatory view of a muddy water pressurizing small-diameter pipe propulsion device to which a shaft bypass device arranged in a starting shaft is applied.
FIG. 32 is a plan view showing the mud water bypass device (muddy water passing state) in the excavator.
FIG. 33 is a plan view showing the mud water bypass device (muddy water bypass state) in the excavator.
34 (a) is a partially broken plan view of the excavator body in the passing state, and FIG. 34 (b) is a partially broken plan view of the excavator body in the bypass state.
35 is a cross-sectional view showing the excavator main body cut along line GG in FIG. 34. FIG.
FIG. 36 is a partially cutaway front view of the excavator main body.
FIG. 37 is a partially broken front view showing the vicinity of a muddy water bypass block of the excavator main body.
FIG. 38 is a front view showing a connection body.
39A is a left side view of the connection body, and FIG. 39B is a front view of the front connection plate.
40 is a cross-sectional front view showing the excavator main body cut along the line HH in FIG. 39 (a). FIG.
FIG. 41 is an enlarged plan view of a muddy water pressurizing small-diameter pipe propulsion device in a start shaft.
FIG. 42 is a partial cross-sectional front view of the entire configuration including a muddy water pressurizing small-diameter pipe propulsion device to which the shaft bypass device of the present embodiment is applied.
FIG. 43 is a plan view of the same.
FIG. 44 is a process diagram in the muddy water pressurizing small-diameter pipe propulsion method.
FIG. 45 is a standard process chart in the muddy water pressurizing small-diameter pipe propulsion method.
FIG. 46 is a partial cross-sectional front view of the manhole housing with a connection casing attached.
FIG. 47 is a front view of a construction state in which the manhole housing is swivel press-fitted by a swivel press-fitting machine.
FIG. 48 is a partial cross-sectional front view showing the installation process of the main pushing device.
FIG. 49 is a partial cross-sectional front view showing a pilot pipe propulsion step.
FIG. 50 is a partial cross-sectional front view showing a pilot pipe propulsion step.
FIG. 51 is a partial cross-sectional front view showing a propulsion pipe propulsion step.
FIG. 52 is a partial cross-sectional front view showing a propulsion pipe propulsion step.
FIG. 53 is a partial cross-sectional front view showing a collecting step for connecting bodies and the like.
FIG. 54 is a partial cross-sectional perspective view of the manhole in a state after the connection casing is removed.
55A is a left side view showing a first connection body of a second example, and FIG. 55B is a front view of a front connection member of the first connection body.
56 is a cross-sectional view of the first connection body taken along the line RR in FIG. 55. FIG.
FIG. 57 is a right side view of the first connection body.
FIG. 58 is a plan view showing a connection structure between a front connection member and a holding member.
59A is a left side view of the holding member, FIG. 59B is a front view of the holding member, and FIG. 59C is a central longitudinal sectional view of the holding member.
60A is a central longitudinal sectional view of a first joint pipe (with an O-ring fitted), and FIG. 60B is a right side view of the first joint pipe.
61A is a left side view of the central rotation shaft, FIG. 61B is a right side view of the central rotation shaft, and FIG. 61C is a central longitudinal sectional view of the central rotation shaft.
FIG. 62 is a front view showing the first connection body (a state in which the holding member and the central rotary tube are removed);
FIG. 63 is a left side view of the first connection body (a state in which the central rotation axis is removed);
FIG. 64 is a right side view of the first connection body (a state in which the central rotation axis is removed);
FIG. 65 is a perspective view of the second connection body (a state in which a central rotation shaft is removed);
FIG. 66 is a left side view of the second connector.
FIG. 67 is a front view showing the second connection body (a state in which the holding member and the central rotary tube are removed);
68 is a central longitudinal cross-sectional front view of the second connector. FIG.
FIG. 69 is a right side view of the second connection body.
FIG. 70 is a plan view of the vicinity of a front connection member.
71A is a central longitudinal sectional view of a second joint pipe (with an O-ring fitted), and FIG. 71B is a right side view of the second joint pipe.
72A is a left side view of the central rotation shaft, FIG. 72B is a right side view of the central rotation shaft, and FIG. 72C is a central longitudinal sectional view of the central rotation shaft.
FIG. 73 (a) is a front view of the vicinity of the connecting hook, and FIG. 73 (b) is a plan view showing a connection portion of the second connection body.
74A is a plan view of the connection hook, FIG. 74B is a front view of the connection hook, FIG. 74C is a right side view of the connection hook, and FIG. 74D is a longitudinal sectional view of the connection hook.
FIG. 75 is a cross-sectional front view of the excavator body of the second example.
FIG. 76 is a perspective view of the main body of the same excavator.
FIG. 77 is a perspective view of the main body (with the cone and the like removed).
FIG. 78 is a perspective view of the same excavator main body (with the cutter portion removed).
FIG. 79 is a cross-sectional plan view of the same excavator main body.
80A is a left side view of the excavator body, and FIG. 80B is a plan view of a front portion of the excavator body.
FIG. 81 is a cross-sectional view of the cutter unit of the second example.
82A is a plan view of a face plate, and FIG. 82B is a left side view of the face plate.
FIG. 83 is a front view of the face plate.
FIG. 84A is a plan view of the bit, and FIG. 84B is a left side view of the bit.
FIG. 85 is a front view of the stirring rib, and (b) is a left side view of the stirring rib.
FIG. 86 is a left side view of the cone.
87 is a longitudinal sectional view of a cone. FIG.
FIG. 88 is a right side view of the cone.
FIG. 89 (a) is a sectional plan view of the flange, and FIG. 89 (b) is a left side view of the flange.
90 is a left side view of the blade opening member. FIG.
FIG. 91 is a central longitudinal sectional view of the blade edge member.
FIG. 92 is an exploded perspective view showing a mud water bypass device in an excavator and a rear end partition wall in a second example.
93 (a) is a left side view of the connecting pipe and the pressure transmitter base, and FIG. 93 (b) is a front view thereof.
94A is a left side view of a connecting pipe, and FIG. 94B is a front view thereof.
FIG. 95 is a front view of a rear end partition wall.
FIG. 96 is a front view showing a state in which the connecting pipe is inserted into the rear end partition wall.
97A is a plan view of an elbow part, and FIG. 97B is a front view of the elbow part.
FIG. 98 is a left side view showing the mower main body in the vicinity of the elbow part.
FIG. 99 is a front view showing the connection between the attachment of the second example and the second connector.
FIG. 100A is a left side view showing the connection between the attachment of the second example and the second connector, and FIG. 100B is a plan view showing the same part.
FIG. 101 is a left side view of the pressing member.
FIG. 102 is a front view of the pressing member.
103 is a front view of the main body mounting bracket. FIG.
FIG. 104 is a left side view of the main body mounting bracket.
FIG. 105 is a cross-sectional front view showing the connection between the first connection body and the second connection body in the third example.
FIG. 106 is a left side view of the first connection body.
FIG. 107 is a front view of the first connection body.
FIG. 108 is a right side view of the first connection body.
FIG. 109 is a left side view of the second connection body.
FIG. 110 is a front view of the second connection body.
FIG. 111 is a front view showing the internal structure of the second connector.
FIG. 112 is a right side view of the second connection body.
FIG. 113 is a left side view of the third embodiment of the excavator body (viewed from arrow II-II in FIG. 115).
114 is a cross-sectional view of the excavator main body taken along line III-III in FIG. 115. FIG.
FIG. 115 is a cross-sectional front view of the excavator main body.
FIG. 116 is a cross-sectional enlarged front view of the front portion of the excavator body.
FIG. 117 is an enlarged cross-sectional front view of the rear portion of the excavator main body.
118 is a cross-sectional view of the excavator main body taken along line IV-IV in FIG. 115. FIG.
119 is a cross-sectional view taken along line VV in FIG. 122;
120 is a cross-sectional view of the excavator main body taken along the line VI-VI in FIG. 122;
121 is a cross-sectional view of the excavator body taken along the line VII-VII in FIG. 122. FIG.
FIG. 122 is a cross-sectional plan view of the rear half of the excavator main body.
FIG. 123 is a front view showing a state of connection between the attachment of the third example and the second connector.
124 is a left side view showing a state of connection between the attachment and the second connector. FIG.
FIG. 125 is a plan view of the attachment.
126 is a left side view of the second pressing member. FIG.
FIG. 127 is a plan view of a second pressing member.
FIG. 128 is a sectional front view of a male spline part.
FIG. 129 is an enlarged view of a muddy water pressurizing small-diameter pipe propulsion device in the vicinity of a starting shaft where a conventional shaft bypass device is arranged.
[Explanation of symbols]
1 Vertical shaft bypass device
2a, 2b chamber
3 Muddy water bypass block
4 main body
5 Disc
6 Rotating shaft
7 Lever
8 Hydraulic cylinder
8a Lightweight hydraulic hose
9a, 9b Stopper
10 Bearing plate
14 Mud pipe
15 Waste mud pipe
16 Mud pipe
17 Drainage pipe
18 Pressure transmitter
19 Pressure transmitter
18a Lightweight electric wire
19a Lightweight electric wire
20 volts (20a-20h)
21 Positioning pins (21a, 21b)
22 Packing
23 Packing
24 Packing
25 Packing
26 right side wall
27 Left side wall
26a Mating surface
27a Mating surface
28 Right side wall
29 Left side wall
28a Mating surface
29a Mating surface
30 Upper body
31 shaft hole
32 Mud hole
33 Drainage hole
34 Mud hole
35 Drainage hole
32a to 35a Packing groove
32b-35b connection port
36 Rear bulkhead
37 Front bulkhead
36a Mating surface
37a Mating surface
38 female screw holes (38a-38c)
38i-38j Positioning hole
39 female screw holes (39a-39h)
40 Lower body
41 Bearing hole
42 Mud hole
43 Drainage hole
44 Mud hole
45 Drainage hole
42a to 45a Packing groove
42 b ~ 45b Connection port
46 Bulkhead
47 Bulkhead
46a Mating surface
47a Mating surface
49 Female screw holes (49a-49h)
49i-49j Positioning hole
51 Front plane
52 back plane
53 Left curve surface
54 Right curve surface
55 Upper plane
56 Lower plane
57 square hole
80 piston rod
81 Extension rod
82 Slide part
85 fixed plate
87 Round bolt
100 cutter parts

Claims (7)

And Okudoro hole Okudoro pipe is connected, and a waste sludge hole discharge mud pipe is connected, it is provided a pair each of the shield machine main body side and mud processing apparatus, and a said transmission mud holes and the waste sludge hole Including a block provided with one chamber communicating with
One valve element is rotatably arranged in the chamber of the block ,
At the pivot position in which the valve body defining said chamber, and supplies to the shield machine main body side of the muddy water is Okudoro passed through the Okudoro hole and the compartmentalized one chamber, the shield machine main body side in or excavated soil and by the including mud water is passed through the waste sludge hole and the compartmentalized other chamber can be discharged to the mud water treatment apparatus,
Alternatively, at a rotation position different from the rotation position of the valve body, the muddy water sent from the muddy hole on the muddy water treatment apparatus side is not passed to the excavator main body side by the one valve body, and the muddy water treatment is performed. A muddy water bypass block that can be bypassed from the mud hole on the device side to the muddy water treatment device side ;
Pit bypass device, wherein a is provided. A muddy water bypass block,
A chamber formed in a central portion inside the muddy water bypass block;
A mud feed hole provided with a connection port that penetrates the mud water bypass block in the front-rear direction so as to communicate with the chamber and to which a mud pipe is connected;
A mud hole with a connection port through which the mud water bypass block passes in the front-rear direction so as to communicate with the chamber and to be arranged in parallel with the mud hole, and to which a mud pipe is connected;
The muddy water is allowed to pass at a parallel position parallel to the axial direction of the muddy water bypass block, and is alternately rotated to the orthogonal position or the parallel position so that the muddy water can be bypassed at a perpendicular position orthogonal to the axial direction. A valve body movably disposed in the chamber;
A rotating shaft provided in the valve body, which is rotatably disposed in a central portion of the muddy water bypass block perpendicular to the axial direction;
A rotating part capable of rotating the rotating shaft;
A shaft bypass device characterized by comprising:   A first fitting surface that can be fitted to the valve body at the parallel position of the valve body is provided at an end portion in the parallel direction of the chamber, and fitted to the valve body at the orthogonal position of the valve body. The shaft bypass device according to claim 1, wherein a second fitting surface that can be combined is provided at an end portion in the orthogonal direction of the chamber. The rotating part is disposed in the axial direction near the muddy water bypass block, a lever having one end fixed to the rotating shaft, the other end of the lever, and a piston rod of the hydraulic cylinder And an actuator having a conversion mechanism that converts the reciprocating motion of the piston rod of the hydraulic cylinder into the rotational motion of the valve body, and a guide holding member that guides the piston rod while holding it linearly. The shaft bypass device according to claim 2 .   The shaft bypass device according to any one of claims 1 to 4, wherein the muddy water bypass block is formed by joining halves.   The shaft bypass device according to any one of claims 1 to 4, wherein the muddy water bypass block is integrated.   The mud pump provided in the mud pipe on the outlet side of the muddy water bypass block and the mud pump provided on the outlet side of the muddy water bypass block are connected to the muddy water treatment device, The shaft bypass device according to any one of claims 1 to 6.

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