JPH0756130B2 - Intubation fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to rehabilitating an aged sewer pipe, for example.
The present invention relates to an insertion tube fixing device used for fixing an insertion tube to a sheath pipe when the insertion pipe is attached to the sheath pipe, such as when attaching a synthetic resin spiral pipe to the sewer pipe. .

(Prior Art) Sewage pipes such as fume pipes may deteriorate due to erosion due to corrosive gas and the influence of earth pressure, and may lead to cracks, water leakage, and the like. For this reason, an old pipe such as a synthetic resin spiral pipe is installed in the aging sewer pipe to rehabilitate the sewer pipe.

The caliber of the insertion pipe installed in the sewer pipe is selected according to the degree of aging of the sewer pipe and the amount of sewage, and in the aging sewer pipe, a relatively small diameter is used for the sewage pipe. . Then, a backing agent such as air mortar is filled between the inner pipe and the sewer pipe.

(Problems to be solved by the invention) The insertion pipe must be installed in a posture in which the end located on the upstream side of the sewer pipe has a predetermined slope higher than the end on the downstream side. It is not easy to make the intubation with a predetermined gradient in the sewer pipe, and in particular, if the difference in diameter between the sewer pipe and the intubation pipe becomes large, the posture of the intubation pipe with respect to the sewer pipe may change significantly. is there. If the difference in bore size between the two becomes large, if the backfilling agent is filled in the gap between the two, the posture of the insertion tube changes due to the buoyancy acting on the insertion tube. The end may be higher than the upstream end, and the flow of sewage may be impaired. If the pressure of the backing agent is too large, or if the buoyancy acting on the insertion tube due to the backing agent becomes too large, the insertion tube may be crushed and damaged.

The present invention solves the above-mentioned conventional problems, and an object thereof is to be able to stably fix an insertion tube in a sheath tube such as a sewer pipe in a predetermined posture and to perform a safe operation. To provide a fixing device.

(Means for Solving the Problems) The insertion tube fixing device of the present invention includes a fixing member fixed so as to face one end surface of the sheath tube, and one end of each of the fixing members is fixed to the fixing member. A plurality of wire rods which are inserted into the sheath pipe in a predetermined posture and are respectively locked to the inner peripheral surface of the insertion pipe fitted in the sheath pipe, and fixed so as to face the other end face of the sheath pipe, A supporting member through which each wire rod is slidably inserted, a tension adjusting member that is disposed so as to be able to come into contact with and separate from the supporting member, and an end portion of each wire rod through which the supporting member is inserted is fixed, An elastic member that is interposed between the tension adjusting member and the support member, and that expands and contracts the tension adjusting member to or away from the support member, and an expansion and contraction driving unit that expands and contracts the expansion and contraction member. It is equipped, and the above-mentioned purpose is achieved by that.

(Example) Hereinafter, the present invention will be described with reference to Examples.

As shown in FIG. 1, the inner tube fixing device of the present invention is used when the inner tube 80 made of, for example, a synthetic resin spiral tube is mounted in an aged sewer pipe 70 which is a sheath tube. Sewer pipe
Each end of 70 is engaged with manholes 71 and 72, respectively.

The intubation fixing device of the present invention is, for example, a manhole on the downstream side.
Fixing member 10 disposed inside 72 and manhole 71 on the upstream side
A support member (20) disposed inside, a tension adjusting member (50) arranged so as to be able to come into contact with and separate from the support member (20), and the tension adjusting member
A plurality of wire rods 30 and 3 installed between the fixing member 10 and the fixing member 10.
It has 0 ,.

The fixing member 10 has, for example, as shown in FIG. 2, a rectangular frame body 11 and a locking plate 12 arranged to close one surface of the frame body 11. Bracket parts 11a, 11a and 11b, 11b projecting to the left and right sides are provided on the upper and lower parts of the frame body 11 so that the upper and lower bracket parts 11a and 11b facing each other can be inserted. Supported on rods 13 and 13
Is provided.

The fixing member 10 is provided with the locking plate 12 located at the center side of the downstream manhole 72, and the frame 11 faces the downstream end surface of the sewer pipe 70 in a predetermined inclined state in the downstream manhole. 72
Fixed inside. In this case, an appropriate support is provided in the manhole 72 so that the fixing member 10 is fixed in a predetermined inclined state. The frame body 10 is locked to one end surface of the sewer pipe 70 or the inner peripheral surface of the manhole 72 either directly or through a supporting structure.

On the upper surface of the frame body 11 of the fixing member 10, an extendable and retractable fixed rod 14 extending in the direction opposite to the side where the sewer pipe 70 is provided is detachably attached, and the tip of the fixed rod 14 is attached. The frame body 10 is brought into contact with the inner peripheral surface of the downstream side manhole 72 on the side opposite to the side where the sewer pipe 70 is disposed, and the frame body 11 is pressed against the inner peripheral surface of the manhole 72 above the sewer pipe 70, thereby forming the frame body 10. The fixing member 10 is fixed by engaging the upper part of the with the end surface of the sewer pipe 70 or the inner peripheral surface of the manhole 72.

The locking plate 12 of the fixing member 10 has, for example, eight elongated holes 12a, 12a,
, Are arranged radially. Adjacent long holes 12a form an angle of 45 degrees.

One end of a wire 30 made of, for example, a piano wire is fixed to each of the long holes 12a by a fixture 31. Each wire rod 30
Are positioned at a predetermined position in each elongated hole 12a so as to form a cylinder having a predetermined diameter. Each wire 30 is introduced into the sewer pipe 70 so as to be orthogonal to the locking plate 12, and is inserted in the sewer pipe 70 in a state of being inclined at a predetermined gradient. Then, each wire 30 is locked to the inner peripheral surface of the inner pipe 80 fitted in the sewer pipe 70.

As shown in FIG. 3, the supporting member 20 arranged in the manhole 71 on the upstream side has a frame body 21 having flange portions 21a, 21a and 21b, 21b, a locking plate similar to the fixing member 10, as shown in FIG. A pair of support rods 23, 23 and a fixed rod 24 are provided. Then, in the locking plate 22, as in the locking plate 12 of the fixing member 10, eight elongated holes 22a, 22a, ... Are radially formed. The support member
20 is disposed facing the upstream end surface of the sewer pipe 70 in a state where the locking plate 23 is located on the center side of the upstream manhole 71 and is inclined so as to be parallel to the fixing member 10. It Then, like the fixing member 10, it is pressed by the fixing rod 24,
The frame body 21 is locked to the end surface of the sewer pipe 70 or the inner peripheral surface of the manhole 71 either directly or through a supporting structure,
20 is fixed.

The sewer pipe 70 is inserted into the elongated holes 23a of the locking plate 25 of the support member 20 in a predetermined inclined state, and
Each of the wire rods 30 locked to the inner peripheral surface of the inner insertion tube 80 is inserted therethrough.

A hydraulic cylinder 40, which is a telescopic member, is attached to the central portion of the locking plate 22 of the support member 20. The hydraulic cylinder 40 is arranged so that the piston rod 41 can advance in the direction opposite to the side where the sewer pipe 70 is arranged.

A central portion of a disk-shaped tension adjusting member 50 is fixed to the tip end portion of the piston rod 41 of the hydraulic cylinder 40. The tension adjusting member 50 is radially provided so that the eight elongated holes 51, 51, ... Are parallel to the elongated holes 22a of the supporting member 20, and are supported by the elongated holes 51. Locking plate 23 in member 20
The end portions of the wire rods 30 that have been inserted through the long holes 23a are fixed by the fixtures 32.

The hydraulic cylinder 40, which is an elastic member interposed between the tension adjusting member 50 and the locking plate 23 of the support member 20, is placed on the ground, for example, via a flexible hose 61 that is inserted through the manhole 71. The hydraulic pressure is sent from the manually operated hydraulic pump 60, so that the hydraulic pump 60 is expanded and contracted. The hydraulic pump 60 is provided with a pressure gauge 62, and the pressure gauge 62 can detect the pressure applied to the hydraulic cylinder 50.

The method of fixing the inner pipe 80 to the sewer pipe 70 using the inner pipe fixing device of the present invention having such a configuration is carried out as follows.

First, the insertion pipe 80 is positioned in the sewer pipe 70. this is,
The insertion tube 80 formed in advance with a predetermined length may be carried in from one of the manholes 71 or 72. However, when the insertion tube 80 having a predetermined length cannot be carried in from the manhole 71 or 72, a manufacturing machine capable of manufacturing a spiral tube from a strip is used, and the manufacturing machine is positioned in one manhole 71 or 72. Then, from the coil placed on the ground,
The spiral pipe may be manufactured by continuously supplying to the manufacturing machine, and the manufactured spiral pipe may be sequentially introduced into the sewer pipe 70.

When the inner pipe 80 having a predetermined length is positioned in the sewer pipe 70, the fixing member 10 is fixed in the manhole 72 on the downstream side so as to be orthogonal to the inclined state of the inner pipe 80 to be fixed. ，
The support member 20 is fixed in the manhole 72 on the upstream side so as to be in the same state. In this case, the hydraulic cylinder 40 attached to the support member 20 is in the most contracted state. Then, for example, eight wire rods 30 are inserted into the inner tube 80. One end of each wire 30 inserted through the inner tube 80 is a fixing member.
Inserting through the inside of each long hole 12a of the locking plate 12 in 10,
It is fixed to a predetermined position of 2a by a fixing member 31. The other end is inserted through each of the long holes 22a of the locking plate 22 of the support member 20, and further through each of the long holes 51 of the tension adjusting member 50, and is fixed at a predetermined position of each of the long holes 51. Fixed at 32.

In such a state, the hydraulic pump 60 mounted on the ground is driven, and the piston rod 41 of the hydraulic cylinder 40, which is a telescopic member, is advanced in the direction away from the support member 20. As a result, the hydraulic cylinder 40 extends and the piston rod 41
The tension adjusting member 50 attached to the tip of the wire is moved in a direction away from the supporting member 20, and the end of each wire 30 fixed to the tension adjusting member 50 is pulled. Then, by pulling the end portion of each wire rod 30, tension is applied to each wire rod 30, each wire rod 30 is locked to the inner peripheral surface of the insertion tube 80, and the insertion tube 80 has a predetermined posture. Becomes When the hydraulic pump 60 is driven and the hydraulic cylinder 40 is extended, the pressure applied to the hydraulic cylinder 40 is confirmed by the pressure gauge 62, and when the tension of each wire 30 reaches a predetermined value, the hydraulic pump 60 Is stopped. As a result, the insertion tube 80 is fixed in a predetermined posture in which the plurality of wire rods 30 are locked on the inner peripheral surface thereof.

The number of wire rods locked to the insertion tube 80 is not limited to eight, and may be six if the diameter of the insertion tube 80 is reduced to about 200 mm. The wire rod 30 is not limited to a piano wire, and a wire, a chain or the like may be used as long as the diameter of the insertion tube 80 is large.

When the inner tube 80 is fixed in a predetermined posture by each wire 30, a backing agent such as cement milk or air mortar is injected into the gap between the inner tube 80 and the sewer pipe 70. It is preferable to inject the backing agent in about three times when the specific gravity of the insertion tube 80 is relatively small and a large buoyancy force acts on the insertion tube 80 due to the injection of the backing agent. When the backing agent is injected three times, as shown in FIG. 4, first, the backing agent is injected so that the lower part of the insertion tube 80 is substantially immersed in the backing agent (see FIG. 4). (See (a)), after the backing agent has solidified, insert the tube.
The backing agent is injected so that the parts other than the upper part of 80 are immersed (see Fig. 4 (b)). In this case, the buoyancy acting on the inner insertion tube 80 is supported by the wire rods 30 that are locked to the lower portion of the inner peripheral surface of the inner insertion tube 80. Then, after the injected backing agent is solidified, the backing agent is injected and solidified so that the entire gap between the insertion pipe 80 and the sewer pipe 70 is filled (see FIG. 4C). . After the backing agent has solidified, the respective ends of each wire 30 are removed from the fixing member 10 and the tension adjusting member 50, and the fixing member 10 and the supporting member 20 are removed from the manhole 71 and the supporting member 20.
Remove from within 72. As a result, the intubation tube 80 becomes the sewer pipe 70
It is wrapped with a backing agent in a predetermined posture. In such a state, sewage flows through the inside of the intubation tube 80.

When a large buoyancy is exerted on the insertion tube 80 at the time of injecting the backing agent, the wire rod 30 that is locked to the lower portion of the inner peripheral surface of the insertion tube 80 has a high strength like a large diameter piano wire or a wire or chain. It should be one.

If the backing agent is not filled in three times but is performed at one time, a large buoyancy will be exerted on the insertion tube 80. Therefore, there is a possibility that the buoyancy acting on the insertion tube 80 cannot be supported by each wire 30. In such a case, in the state where the insertion tube 80 is locked to each wire 30, the downstream end of the insertion tube 80 is watertightly sealed by a water stopper, and the inside of the insertion tube 80 is sealed. After injecting water into the container, the upstream end is also sealed in a watertight manner with a water stopcock. By doing so, even if the backfilling agent is filled into the gap between the insertion pipe 80 and the sewer pipe 70 at one time, the buoyancy acting on the insertion pipe 80 is suppressed by the water stored in the insertion pipe 80. Since there is no possibility that the insertion tube 80 will float,
There is no danger of being crushed. When filling the backing agent,
The heat generation action may cause the endotracheal tube to be more easily deformed. However, the water stored in the endotracheal tube 80 is
To prevent 80 from softening, and also to insert tube 80 and sewer pipe
By cooling the backing agent filled in the gap with 70, the backing agent can be cured and cured under low temperature conditions where cracking does not occur.

When filling the inside of the insertion tube 80 with water, without closing each end of the insertion tube 80, for example, the upper part of each end is left open, and the upper part of the upstream end is opened. Therefore, the sewage accumulated upstream of the sewage pipe 70 during construction may be pumped into the inner pipe 80. In this case, intubation
The sent sewage stays in 80. If the amount of staying sewage exceeds a predetermined amount, it will stay in the insertion tube 80 from the open upper end of the downstream end of the insertion tube 80. Sewage overflows. Therefore, this method is effective when the sewage flowing through the sewage pipe 70 cannot be retained for a long time.

(Effect of the Invention) Since the insertion tube fixing device of the present invention fixes the insertion tube in the sheath tube in a predetermined posture by using the wire rod in this manner, the insertion tube floats when the backing agent is filled. Can be prevented, and deformation and damage of the endotracheal tube can be prevented. The elastic member using a hydraulic cylinder or the like can integrally pull the ends of the wire rods, so that uniform tension is applied to the wire rods and the insertion tube is stably held. As a result, there is no possibility that the insertion tube will change when the backing agent is filled. Further, since the expansion / contraction member can easily control the expansion / contraction of the expansion / contraction member, a predetermined tension can be uniformly applied to each wire. As a result, the wire rod can be pulled close to the critical tension of the wire rod without breaking the wire rod. Moreover, by arranging the means for driving the expansion / contraction member at a position distant from the expansion / contraction member, it is not necessary for the worker to approach the wire rod when applying tension to each wire rod. Even if the wire breaks, there is no risk of the worker being injured by the broken wire.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a use state of the insertion tube fixing device of the present invention, FIG. 2 is a perspective view of a fixing member, FIG. 3 is a perspective view of a supporting member and the like, and FIG. It is a sectional view of a sewer pipe for explaining. 10 …… Fixing member, 12 …… Locking plate, 12a …… Oval hole, 20 …… Supporting member, 22 …… Locking plate, 22a …… Oval hole, 30 …… Wire rod, 40 …… Hydraulic cylinder, 50 ...... Tension adjusting member, 60 …… Hydraulic pump, 70
…… Sewer, 80 …… Intubation.

Claims (1)

[Claims] 1. A fixing member fixed so as to face one end surface of the sheath tube, and one end of each of the fixing members is fixed to the fixing member, and the sheath tube is inserted into the sheath tube in a predetermined posture. A plurality of wire rods, each of which is locked to the fitted inner peripheral surface of the inner pipe, and a support member fixed so as to face the other end face of the sheath pipe, and slidably inserted through the respective wire rods; A tension adjusting member, which is disposed so as to be able to come into contact with and separate from the supporting member, and to which an end portion of each wire rod inserted through the supporting member is fixed, and is interposed between the tension adjusting member and the supporting member. An insertion tube fixing device comprising: an expansion / contraction member that separates or approaches the tension adjusting member with respect to the support member by expansion and contraction thereof; and an expansion / contraction driving unit that drives the expansion / contraction member to expand / contract.