JPH0423883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mortar lining device for the inner surface of a tube.

[Conventional technology and its technical issues]

The present inventors proposed Japanese Patent Application No. 60-292925 (Japanese Unexamined Patent Publication No. 62-152705) as a means for lining pipes such as water and sewerage pipes and seawater transfer pipes with mortar.

This device uses a projection impeller that projects mortar in the radial direction using centrifugal force, and is configured to rotate this projection impeller at high speed while moving it in the axial direction of the rotating tube using turning rollers.

According to this method, mortar lining can be efficiently and relatively accurately applied to the inner surface of a long pipe, compared to a method in which mortar is simply dropped by gravity using a bucket or belt conveyor.

However, the above-mentioned prior art uses a projection impeller as the lining means and rotates it at high speed with a motor. For this reason, the projection mechanism has to be large, and the pipes that can be lined are effectively limited to large diameter pipes of 450 mmφ or more. There was a problem that it could not be lined.

The present invention was devised to solve the above-mentioned problems, and its purpose is to efficiently mortar-line long pipes of various relatively small diameters with less uneven lining thickness. The objective is to provide a seed device.

Another object of the present invention is to provide a device of this type that can successfully line a pipe to be mortar-lined by avoiding the end rings of the pipe.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a movable blowing truck equipped with means for rotating a pipe to be mortar lined, a mortar continuous supply mechanism, and a pressure pipe for air conveying the mortar discharged from the mortar in the direction of the pipe axis. and a movable centering table having a similar groove-shaped guide having a V-shaped cross section;
Behind this, support legs are provided at predetermined intervals to contact the groove-shaped guide.

Further, in addition to the above-mentioned configuration, the present invention has a configuration in which means is provided at the front end of the centering table to avoid collision of the support leg with the tube end ring. A roller is preferably used as this collision avoidance means, and a bar that contacts the roller is attached to the pressure pipe.

[Effect]

When applying mortar lining to the tube, the centering table is moved to a position close to the tube to center the core of the tube and the grooved guide. At this time, since the pressure feed tube is supported by the supporting legs on the groove-shaped guide, the center of the pressure feed tube and the spray nozzle at the tip of the tube automatically align with each other.

Then, the spray truck is moved forward. The spray nozzle and the pressure pipe enter the tube body in a centered state by the support legs coming into contact with the groove-shaped guide, and the support legs at the insertion position make contact with the inner surface of the tube body. When the spray nozzle reaches the end of the tube, rotate the tube and
The spraying cart is moved backward while discharging mortar from the continuous supply mechanism. The mortar is conveyed at high speed by air through the pressure-feeding tube, and when it reaches the tip, the flow is changed in the radial direction by chips and is sprayed onto the rotating tube. The support leg and the groove guide work together to move the pressure feed tube backward while maintaining a good centering condition, so even if the pressure feed tube is long and easily bent, the lining layer is uniform. The lining work ends when the spray nozzle passes through the tube.

If a tube end ring is attached to the mouth end of the tube body, this tube end ring projects inward. Therefore, there is a risk that the movement of the supporting legs will be hindered.
Since a means for temporarily displacing the pressure pipe is provided at the front end of the centering table, it is possible to successfully overcome the projecting wall of the pipe end ring.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 schematically show a mortar lining device according to the invention. 1 is a steel pipe to which mortar lining is applied, 2 is a steel pipe that supports the steel pipe 1 horizontally,
A turning roller for rotation around a horizontal axis, 3 a gate-shaped spraying cart, and 4 a long centering table that is combined with the spraying cart 3 so as to be able to come into contact with and separate from it.

Figures 3 to 11 show each mechanism,
The spray truck 3 and centering table 4 are shown in detail in FIGS. 3 to 5. The spraying cart 3 includes a gate-shaped frame 3a, and the frame 3a is provided with motor-driven wheels 3b, 3b, and the steel pipe 1
an outer rail 11 laid on the base floor L in parallel with
It can move forward and backward along 11. A hopper 30 for accommodating kneading mortar and a pressure pump 31 of any type, such as a squeeze type, connected to the hopper 30 are mounted on the upper side of the frame 3a. Also, the lower side of the frame 3a (the upper side is also fine)
A compressed air supply means, that is, a receiver tank or compressor 32 is mounted on the unit.
A support assembly 3c for supporting the base end of the pressure pipe 5 is disposed on the front side of the frame 3a, that is, at a portion facing the steel pipe 1, as shown in FIGS. 4 and 4a.

This support assembly 3c includes a horizontal frame 30
A horizontal slide block 33 is movably attached to a screw shaft or the like, a guide block 34 is fixed to the horizontal slide block 33, and a vertical slide is attached to this guide block 34 so as to be movable up and down by a screw shaft or the like. It is equipped with a block 35, and a pressure pipe 5 is installed at the bottom of this vertical slide block 35.
is supported through. The pressure pipe 5 is connected to the discharge part of the pressure pump 31 by a hose 50, and an air addition nozzle 51 connected to the compressed air supply means 32 is connected to the connection part with the hose 50. This air addition nozzle 5
1 consists of, for example, a ring part and a plurality of diagonal pipes branching from the ring part. In addition, when the pressure pump 31 itself has a compressed air addition part,
The air addition nozzle may be omitted.

Next, the centering table 4 is a tracing means for moving the pressure-feeding pipe 5 through the steel pipe while correctly aligning the core with the steel pipe 1. This centering table 4 is a groove-shaped guide 4 having a length equal to or longer than the length of the steel pipe 1.
a and a stand frame 4b that supports it. The cross section of the groove-shaped guide 4a perpendicular to the longitudinal direction is V.
The groove-shaped guide 4 has a shape of a letter or a U-shape.
As shown in FIGS. 3 and 4, bases 40, 40 are fixed to the lower surface of at least both ends in the longitudinal direction of a. On the other hand, the platform frame 4b has wheels 4c, 4c.
It is movable along inner rails 12, 12 laid on the base L parallel to the outer rails 11, 11.

As shown in FIG. 5, this stand frame 4b is provided with a support stand 42 at a position corresponding to the bases 40, 40, which is raised and lowered by an arbitrary type of jack 41 such as a screw type. A slide guide block 43 is installed, and a slider 45 connected to the base 40 is engaged with an adjustment shaft 44 disposed on the slide guide block 43, so that the groove-shaped guide 4
The position of a can be freely adjusted in the height direction and the horizontal direction (lateral direction).

The pressure pipe 5 has a length longer than the steel pipe 1,
A spray nozzle 6 is provided at the tip. The spray nozzle 6 may be in the shape of an elbow or a bent tube, but since the spray nozzle 6 has a small spread angle and protrudes in the radial direction, it is not suitable for reducing the diameter. Therefore, as shown in FIGS. 6 and 8, a ring member 6a that is removably fitted to the pressure pipe 5 is preferably used.
and a tip 6b facing this ring member 6a at a required interval.
The tip 6b is made of a wear-resistant material such as ceramic such as alumina or silicon carbide, and is provided with an outflow direction control portion 60 that protrudes toward the pressure pipe 5 in a conical or recessed conical shape. The chip 6b has three to five bolt holes 61 at equal intervals on the circumference, and is connected to the ring member 6a by a connecting rod 62 that fits into the bolt holes 61. According to this structure, mortar can be sprayed with a 360° spread so that the diameter of the spraying means can be reduced, and the chip 6b can be easily replaced.

Furthermore, the pressure feed pipe 5 is provided with a support leg mechanism 7 for cooperating with the centering table 4 to create a lining layer of uniform thickness on the steel pipe 1 at regular intervals, for example, 1500 to 2000 mm in the longitudinal direction of the pressure feed pipe. It is located in

Specifically, the support leg mechanism 7 is shown in FIGS. 5, 9,
It is shown in FIG. 10, that is, a support 7a on which the pressure pipe 5 is fitted, a plurality of leg shafts 7b attached to the support 7a at a required inclination angle of 120 degrees, and the leg shafts 7b. The ball bearing 7c is held at the tip of the guide surface 4 of the groove-shaped guide 4a.
00 and 400, the centering movement of the pressure pipe 5 is obtained.

The leg shaft 7b may be directly screwed and fixed to the support 7a, but in this embodiment, the leg shaft 7b is provided with a bracket 70 and fixed with screws 71. The length of the leg shaft 7b can be adjusted as appropriate depending on the diameter of the steel pipe 1 to be lined.This can be done by replacing the leg shaft 7b and reattaching it to the support 7a, or by using a male thread 720 as shown in FIG.
An adjustment member 72 having female screws 721 formed at both ends may be optionally provided. In order to allow the support 7a to be attached to any position on the pressure-feeding pipe 5, a screw hole 73 is provided at an appropriate position, and a push screw 74 is provided in the support 7a.
It is designed to be fixed to the pressure feeding pipe 5 by screwing.

In lining the steel pipe 1, in order to prevent mortar from flowing out from the pipe end and to form a clean lining end surface, the steel pipe 1 is lined as shown in Fig. 6.
A tube end lining 10 is attached to the mouth end of the tube. This tube end ring 10 has an annular flange 1 that extends inward.
00, and if the leg shaft 7b collides with this, the pressure feeding pipe 5 will not be able to move smoothly.

Therefore, in the present invention, a means 8 for temporarily displacing the pressure pipe 5 extending into the annular flange portion is provided at the front end of the centering table 4. This displacement means 8
Alternatively, as shown in FIG. 6a, a swash plate 8a extending obliquely downward may be provided at the front end of the groove-shaped guide 4a.

In this case, the groove guide 4a is set at a slightly higher position than the steel pipe 1, and the swash plate 8a
By bringing the leg shaft 7b ₂ into contact with the steel pipe 1, the pressure-feeding pipe 5 is lifted at that portion, thereby displacing the height of the leg shaft 7b ₃ inside the steel pipe 1. However, in this type, when the leg shaft 7b ₂ is in contact with the swash plate 8a, the front and rear leg shafts 7b ₁ and 7b ₄ are connected to the groove guide 4a and the steel pipe 1, respectively.
The number of leg axles required is increased.

In order to avoid this disadvantage, the formats shown in FIGS. 6 and 7 are suitable. That is, in this embodiment, the groove-shaped guide 4a is provided with an arm 8b extending forward, and the groove-shaped roller 8c is attached to the arm 8b via a height adjustment member 80 so as to protrude upward from the groove bottom of the groove-shaped guide 4a. It is supported by And the pressure pipe 5
A bar 5a is fixed to the lower side of the grooved roller 8 along the longitudinal direction by welding or the like.
c, and support 7a
An opening 75 is formed in which allows the bar 5a to protrude. This bar 5a also functions as a reinforcing rib that reduces the deflection of the pressure pipe 5.

The centering table 4 may be self-propelled by motors, but in this embodiment, for the sake of simplicity, the self-propelling force of the spraying cart 3 is used to move the centering table 4. FIG. 11 shows an example of this, in which a ring 9 is provided on one side in the longitudinal direction of the centering table 4, a bracket 36 is provided that projects inside the frame 3a of the spraying cart 3, and the ring 9 is attached to the bracket 36. A hook 360 for engaging and disengaging is provided. An operating lever 361 is pivotally attached to a movable fulcrum of the hook 360, and by moving the operating lever 361 using a pedal or the like, the engagement, that is, the lock, between the hook 360 and the ring 9 is released.

The amount of mortar lining is Hopper 3.
By providing a measuring device such as a load cell at 0, accurate quantity control can be performed.

[Effect of the embodiment]

Next, the usage and operation of the device shown in the example will be explained.

First, attach the pipe end ring 1 to the steel pipe 1 to be lined.
0 and rotation rings are attached and placed on the turning roller 2. At this time, the spraying cart 3 and the centering table 4 are located at the rear in a state where they are connected by the ring 9 and the hook 360 as shown in FIG.
The kneaded mortar is put into the hopper 30.
The pressure pipe 5 is stably supported by the groove-shaped guide 4a by leg shafts 7b, 7b extending in a V-shape as shown in FIGS. 3 and 5.

Next, by driving the wheels 3b, 3b of the spray truck 3, the spray truck 3 moves forward along the outer rails 11,11. At the same time, the centering table 4 is also pulled and moved along the inner rails 12, 12 to a position closest to the steel pipe 1.

Therefore, next, the core of the steel pipe 1 and the groove-shaped guide 4a are aligned. Specifically, this centering work
As shown in the figure, this is done by selectively operating the jack 41 and the adjustment shaft 44, and the former moves the grooved guide 4a in a direction perpendicular to the base frame 4b. Since there are multiple jacks 41 in the longitudinal direction, any inclination in the longitudinal direction is corrected. Further, the latter allows the groove-shaped guide 4a to slide in the lateral direction, and since the adjustment shafts 44 are also provided at a plurality of locations, it is possible to easily correct the overall positional deviation in the horizontal direction. If the horizontal slide block 33 and vertical slide block 35 of the support assembly 3c of the spray cart 3 are unlocked when adjusting the position of the groove-shaped guide 4a, the pressure pipe 5 will remain vertical as a whole while being supported by the groove-shaped guide 4a. slide in the direction and/or horizontal direction. When the diameter of the steel pipe 1 changes to the larger diameter side, the center of the pressure-feeding pipe 5 moves upward within the groove-shaped guide 44a, so the leg shafts 7b, 7b of corresponding lengths may be attached.

When the centering is completed as described above, the connection between the spraying carriage 3 and the centering table 4 is released, and the spraying carriage 3 is moved forward. As a result, the pressure pipe 5 moves within the groove-shaped guide 4a, and the spray nozzle 6 is loosely inserted into the steel pipe 1. At this time, the ball bearings 7c, 7c at the tips of the leg shafts contact the track surfaces on both sides of the groove-shaped guide 4a, and further contact the inner surface of the steel pipe 1, so that the small diameter and long pressure pipe 5 does not bend excessively. , inserted into the steel pipe with good centering.

When the spray nozzle 6 at the tip reaches the other end of the steel pipe 1, the turning roller 2 is driven, and at the same time, the pressure pump 31 starts operating, and compressed air is supplied from the compressed air supply means 32 to the air addition nozzle 51. As a result, the steel pipe 1 rotates, and the mortar is discharged into the pressure pipe 5 and at the same time is conveyed at high speed by compressed air, reaching the spray nozzle 6 at the tip. Then, all that is left to do is to move the spray truck 3 backwards at the required speed.

As a result, the pressure pipe 5 moves backward, but the outer leg shafts 7b and 7b come into contact with the groove guide 4a, so that it moves backward while being horizontally supported, so that the spray nozzle 6 is aligned with the steel pipe 1 precisely. In other words, it moves while maintaining a certain clearance with the inner surface of the steel pipe. As shown in FIGS. 8 and 12, the flow of the mortar that has been conveyed through the pressure pipe 5 by air at high speed is changed in the radial direction by the outflow direction control section 60 formed in the tip 6b, and the flow is changed in the radial direction. sprayed radially. As before, with proper centering, and because the steel pipe 1 is rotating, the lining thickness is uniform, and the mortar is impulsively adhered by air pressure, and centrifugal force acts on the steel pipe, so it hardens. The speed will also be faster.

The spray truck 3 moves backward until the spray nozzle 6 reaches the end of the steel pipe 1, and at this point the operation of the pressure pump 31 and the compressed air supply means 32 are stopped. At this time as well, the rotation of the steel pipe 1 is continued.

When the spray nozzle 6 has retreated into the groove-shaped guide 4a, the spray carriage 3 and the centering table 4 are reconnected and the spray carriage 3 is run, so that the two move as one to the desired position. .

Then, a finishing jig is inserted from the end of the steel pipe 1 to level the surface of the lining layer and drain water. With this, one cycle of mortar lining is completed.

When the pressure pipe 5 enters and retreats from the steel pipe 1, the lower bar 5a is in a floating state within the groove-shaped guide 4a. However, the front end of the grooved guide 4a has a grooved roller 8c whose level is raised by the required height.
There is. Therefore, the bar 5a is connected to this grooved roller 8.
The pressure pipe 5 is lifted only while contacting the pipe end ring 10, and as a result, the level of the required length in the front and back is bent upward, and the position of the leg shafts 7b, 7b is also displaced upward, so that the annular flange 10 of the pipe end ring 10
0 can be naturally exceeded, and the pressure feeding pipe 5 can be moved smoothly. Since the displacement of the pressure pipe 5 is almost instantaneous, and linearity is ensured in the remaining portion, the displacement of the spray nozzle 6 due to overpassing is so small as to be ignored.

〔Effect of the invention〕

According to the present invention described above, since the spraying method uses air pressure, the lining means does not need a rotation mechanism, and therefore the diameter of the lining means can be reduced to 150 mmφ.
It is possible to efficiently mortar line a pipe body with a small diameter. Moreover, instead of inserting and removing the pressure pipe into the steel pipe in a cantilevered state, support legs are attached to the pressure pipe at intervals, and these legs are brought into contact with each other along a groove-shaped guide placed in front of the steel pipe. The spray nozzle can be moved while accurately aligning with the steel pipe, making it possible to form a mortar lining with a uniform thickness with little thickness deviation.Furthermore, by utilizing the high-speed conveying force of compressed air, Since it is sprayed onto the inner surface of the steel pipe and adheres to it using the centrifugal force generated by the steel pipe's rotation, it has excellent effects such as rapid drainage and quick solidification.

Further, according to the second aspect of the invention, since the pipe end ring of the steel pipe can be successfully avoided, the effect that the pressure pipe can be inserted and removed smoothly can be obtained.

Furthermore, according to claims 3 and 4, alignment can be easily performed even if the diameters of the tubes are different, so that it is possible to efficiently apply mortar lining to tubes having a wide range of diameters.

Furthermore, according to the invention of claim 5, since the arrangement of the support legs with respect to the pressure pipe can be changed arbitrarily, it is possible to achieve the effect that appropriate centering movement can be achieved in pipe linings of various lengths.

According to the invention set forth in claim 6, excellent effects can be obtained in that the diameter of the spray nozzle can be made small, the spray angle can be set over a wide range, and replacement can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing an embodiment of the tubular mortar lining device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line of Fig. 1, and Fig. 4 is a partially cutaway side view of the spraying truck in FIG. 1, FIG. 4a is a perspective view of the front part of the spraying truck, FIG. 5 is a sectional view showing the connection between the centering table and the pressure feed pipe, and FIG. 6 is the lining state. Longitudinal side view of
Fig. 6a is a schematic explanatory diagram showing another embodiment of the collision avoidance mechanism, Fig. 7 is a sectional view taken along the line of Fig. 6, Fig. 8 is an enlarged sectional view of the tip of the pressure pipe, and Fig. 9 is a schematic explanatory diagram showing another embodiment of the collision avoidance mechanism. A perspective view of the support leg mechanism, FIG. 10 is a sectional view showing another example of the support leg mechanism, FIG. 11 is a plan view illustrating the connection mechanism between the spraying carriage and the centering table, and FIG. 12 is the lining state. FIG. 1... Steel pipe, 2... Turning roller, 3...
Spraying cart, 4...Centering stand, 4a...Groove guide, 5...Pressure pipe, 5a...Bar, 6...Blowing nozzle, 6a...Ring member, 6b...Tip, 7... Support leg mechanism, 7a...Support, 7b
... Leg shaft, 7c ... Ball bearing, 8 ... Pressure pipe displacement means, 8c ... Groove roller, 10 ...
...Tube end ring, 31...Pressure pump, 32...Compressed air supply means, 62...Connecting rod.

Claims (1)

[Scope of Claims] 1. A movable blowing cart equipped with means for rotating a pipe to be mortar lined, a continuous mortar supply mechanism, and a pressure pipe for air conveying the mortar discharged from the mortar in the direction of the pipe axis, and a cross-sectional is equipped with a movable centering table having a groove-shaped guide similar to that of a V-shape, and the pressure pipe is equipped with a blowing nozzle at its tip containing a chip that changes the flow of the mortar in the radial direction.
A tubular mortar lining device, characterized in that support legs are provided at predetermined intervals behind the support legs for rolling contact with the groove-shaped guide. 2. A means for rotating the pipe to be mortar lined, a movable blowing cart equipped with a mortar continuous supply mechanism, a pressure pipe for air transporting the mortar discharged from the pipe in the direction of the pipe axis, and a similar groove with a V-shaped cross section. A movable centering table with a shaped guide is provided, the pressure pipe is equipped with a blowing nozzle containing a tip that changes the flow of the mortar in the radial direction,
Support legs are provided at predetermined intervals rearwardly to contact the groove-shaped guide, and furthermore, in order to avoid collision between the support legs and a pipe end ring attached to the mouth end of the pipe to be lined at the front end of the centering table. A tubular mortar lining device characterized by comprising means for temporarily displacing a pressure pipe. 3. The tubular mortar lining device according to claim 1 or 2, wherein the height and horizontal positions of the groove guide are adjustable. 4. The tube mortar lining device according to claim 1 or 2, wherein the pressure feeding pipe is supported by a blowing cart so that its position can be freely adjusted in the height direction and horizontal direction. 5. The tubular mortar lining device according to claim 1 or 2, wherein the support leg is attached at a required angle to a support that fits over the pressure pipe and has a free bearing at the tip. 6. Claims in which the spray nozzle has a ring member fitted to the tip of the pressure pipe and a wear-resistant cone-shaped tip facing the ring member, and the cone-shaped tip is connected to the ring member by a connecting rod. 1st
The tubular mortar lining device according to item 1 or 2. 7. The pipe mortar lining device according to claim 2, wherein the means for displacing the pressure pipe to one point is a roller, and the pressure pipe is equipped with a fixing bar in contact with the roller.