CN221034600U - Expansion pipe capable of being inserted into hollow drain pipe - Google Patents

Abstract

An expansion pipe capable of being inserted into a hollowed-out drain pipe is formed by connecting a high-pressure hose and a low-pressure hose; the low-pressure hose is positioned at the head end of the expansion pipe, and the head of the low-pressure hose is closed; the high-pressure hose is positioned at the tail end of the expansion pipe and is communicated with the high-pressure air source. The low-pressure hose has good expansibility, and can seal the hollowed-out holes on the hollowed-out drain pipe after being inflated. The expansibility of the high-pressure hose is poor, and the purpose of arranging the high-pressure hose is to increase the insertion depth of the low-pressure hose in the hollow drain pipe, so that the low-pressure hose can reach a required working position. After the expansion of the low pressure hose, the high pressure hose moves outwards, leaving room for the expansion of the low pressure hose. The expansion pipe can limit the axial expansion amount of the low-pressure hose through the radial stop pin, the sleeve and the anti-return elastic claw arranged on the sleeve, and prevent the low-pressure hose from being broken due to bulge on the premise of ensuring that the hollow hole is completely plugged.

Description

Expansion pipe capable of being inserted into hollow drain pipe

Technical Field

The utility model relates to the field of civil engineering, in particular to an expansion pipe which can be inserted into a hollowed-out drain pipe.

Background

Patent application number 2022221308169 discloses a fretwork drain pipe for civil construction, in this patent, in order to avoid concrete to get into the fretwork drain pipe from the fretwork hole when pouring, has inserted the gasbag in the fretwork drain pipe during the construction, and the inflation can block the fretwork hole after the gasbag is inflated, prevents concrete inflow fretwork drain pipe in, can solve the drainage problem in the work process like this. Because the hollowed-out drain pipe is longer, the air bag used at present is a plastic hose with better expansibility.

As shown in fig. 1, in the construction process, we find that the hollow drainage pipe has flaws, which are specifically expressed as follows: since the compressed air of 0.2MPa is introduced into the plastic hose 70, the plastic hose 70 expands not only in the radial direction but also in the axial direction. The amount of expansion of the plastic hose 70 in the radial direction is limited by the hollowed out drain pipe 10. The plastic hose 70 expands in the axial direction by a much larger amount than in the radial direction. When the expansion length of the plastic hose 70 exceeds the length of the hollow drain pipe 10, the extended portion is not constrained by the hollow drain pipe 10, a bulge is formed at the outlet portion of the hollow drain pipe 10, the wall thickness of the bulge portion is very thin, and the bulge is easily exploded by compressed air. Therefore, the length of the plastic hose 70 is properly shortened during construction, but the shortening amount is difficult to master, the shortening amount is too much, and the hollow holes cannot be completely plugged; too little shortening and swelling can occur.

Disclosure of utility model

In order to overcome the defects in the background technology, the utility model discloses an expansion pipe which can be inserted into a hollowed-out drain pipe, which adopts the following technical scheme:

an expansion pipe capable of being inserted into a hollowed-out drain pipe is formed by connecting a high-pressure hose and a low-pressure hose; the low-pressure hose is positioned at the head end of the expansion pipe, and the head of the low-pressure hose is closed; the high-pressure hose is positioned at the tail end of the expansion pipe and is communicated with the high-pressure air source.

After implementing the technical scheme, the beneficial effects that it produced are:

1. The low-pressure hose has good expansibility, and the hollow holes can be plugged after the low-pressure hose is inflated. In order to prevent bulging, the length of the low-pressure hose must be smaller than the length of the hollow-out drain pipe, but in this way the low-pressure hose cannot reach the required working position. The expansibility of the high-pressure hose is poor, and the function of arranging the high-pressure hose is to increase the insertion depth of the low-pressure hose in the hollow drain pipe, so that the low-pressure hose can reach a required working position. After the expansion of the low pressure hose, the high pressure hose moves outwardly, leaving room for the expansion of the low pressure hose.

2. The latest hollowed-out drain pipe is made of plastic materials, the hollowed-out drain pipe is quite long, the hollowed-out drain pipe is inevitably bent after being paved, and the hard pipe cannot be completely inserted. The high-pressure hose and the low-pressure hose have flexibility and can be completely inserted into the hollow drain pipe.

3. The high-pressure hose and the low-pressure hose have windability, and the occupation of the operation space can be greatly reduced.

Further improving the technical proposal, the high-pressure hose and the low-pressure hose are connected through a pipe joint.

After implementing the technical scheme, the beneficial effects that it produced are: the pipe joint can realize the connection of a high-pressure hose and a low-pressure hose with the same pipe diameter, and can also realize the connection of the high-pressure hose and the low-pressure hose with different pipe diameters.

Further improving the technical scheme, installing a plug at the head of the low-pressure hose, wherein the plug is used for sealing the head of the low-pressure hose.

Further improving the technical scheme, the length of the high-pressure hose is longer than the elongation of the low-pressure hose after inflation.

After implementing the technical scheme, the beneficial effects that it produced are: the length of the high-pressure hose is larger than the elongation of the low-pressure hose after inflation, so that a part of the high-pressure hose is always left outside the hollow drain pipe. Therefore, the insertion depth of the low-pressure hose in the hollowed-out drain pipe can be intuitively known by measuring the length of the high-pressure hose left outside the pipe.

According to the further improved technical scheme, the pipe joint is provided with a threaded hole, a radial stop pin is screwed in the threaded hole, and the radial stop pin is positioned in a certain hollowed hole of the hollowed drain pipe and used for limiting the axial movement of the pipe joint.

After implementing the technical scheme, the beneficial effects that it produced are: after the low-pressure hose is expanded, the low-pressure hose possibly stretches out of the hollow drain pipe to form a bulge. The radial stop pin can prevent the pipe joint from moving outwards, so that the axial elongation of the low-pressure hose is limited, and the low-pressure hose is prevented from forming a bulge after extending out of the hollow drain pipe.

Further improving the technical scheme, the pipe diameter of the high-pressure hose is larger than that of the low-pressure hose; a sleeve is arranged between the high-pressure hose and the hollow drain pipe, and can move along the high-pressure hose to one side of the low-pressure hose and sleeve part of the low-pressure hose therein.

After implementing the technical scheme, the beneficial effects that it produced are: during construction, the sleeve is inserted into the hollow drain pipe, and the low-pressure hose is expanded and then enters the sleeve. The sleeve is equivalent to lengthening the length of the hollow drain pipe, and the low-pressure hose is restricted by the sleeve and cannot bulge.

Further improving the technical scheme, be equipped with the elastic claw that blocks of stopping on the sleeve pipe, the elastic claw that blocks with the fretwork hole block on the fretwork drain pipe for prevent the sleeve pipe to outwards retreat.

After implementing the technical scheme, the beneficial effects that it produced are: after the low pressure hose expands, an outward thrust is generated on the sleeve. The anti-return elastic claw is clamped with the hollow hole on the hollow drain pipe, so that the sleeve and the hollow drain pipe can be clamped together, the sleeve is prevented from being pushed out by the low-pressure hose, and the low-pressure hose stretches out of the hollow drain pipe to form a bulge.

Drawings

Fig. 1 is a schematic diagram showing bulge generated in a conventional plastic hose.

Fig. 2 shows a schematic structural view of the present expansion pipe in example 1.

Fig. 3 is a schematic view showing the inflation tube of example 1 before inflation.

Fig. 4 is a schematic view of the inflation tube of example 1 after inflation.

Fig. 5 shows a schematic structural view of the present expansion pipe in example 2.

Fig. 6 shows a schematic structural view of the present expansion pipe in example 3.

Fig. 7 is a schematic view showing the inflation tube before inflation in example 3.

Fig. 8 is a schematic view of the inflation tube of example 3 after inflation.

Fig. 9 is a schematic diagram showing the connection between the sleeve and the hollow drain pipe in embodiment 4.

Fig. 10 is a schematic view illustrating a clamping structure of the elastic stopping pawl and the hollow hole according to embodiment 4.

Fig. 11 is a schematic diagram of another clamping structure of the elastic stopping pawl and the hollow hole in embodiment 4.

Drawings

10. Hollow drain pipes; 11. a hollowed hole;

20. An expansion tube; 21. a low pressure hose; 22. a high pressure hose; 23. a pipe joint; 24. a plug; 25. a pipe clamp; 26. a radial stop pin;

30. A sleeve; 31. a backstop elastic claw;

40. A high pressure gas pipe;

50. A layer of earth;

60. concrete;

70. A plastic hose;

80. An end cap.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. It should be noted that, in the description of the present utility model, terms such as "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. It should also be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Example 1

Reference is made to fig. 2. An expansion pipe capable of being inserted into a hollowed-out drain pipe is formed by connecting a high-pressure hose 22 and a low-pressure hose 21. The low pressure hose 21 is located at the head end of the inflation tube 20, and the head of the low pressure hose 21 is closed. A high pressure hose 22 is located at the trailing end of the expansion tube 20, the high pressure hose 22 being in communication with a high pressure air supply.

In the present embodiment, the pipe diameter of the high-pressure hose 22 is larger than that of the low-pressure hose 21, and the high-pressure hose 22 and the low-pressure hose 21 are connected by a pipe joint 23 of variable diameter. A plug 24 is mounted on the head of the low pressure hose 21, and the plug 24 is used to close the head of the low pressure hose 21. The high-pressure air pipe 40 is a steel pipe, one end of the high-pressure air pipe 40 is connected with a high-pressure air source, and the other end is connected with the high-pressure hose 22, and is used for introducing compressed air into the high-pressure hose 22 and the low-pressure hose 21. The high-pressure hose 22 and the low-pressure hose 21 are provided with the pipe hoops 25, and the pipe hoops 25 are beneficial to improving the tightness and the reliability of the connection between the high-pressure hose 22 and the low-pressure hose 21 and the pipe joint 23 and the plug 24.

The high-pressure hose 22 is a low-expansion hydraulic hose, and the low-pressure hose 21 is a rubber tube with good expansibility. After the compressed air of 0.2MPa is introduced, the expansion of the high-pressure hose 22 is small and negligible, while the low-pressure hose 21 generates significant radial expansion and axial expansion.

Reference is made to fig. 3. In this embodiment, the hollow drainage pipe 10 is inserted into the soil stone layer 50, and is used for draining water in the soil stone layer 50 into the tunnel. Before the second lining is poured, the expansion pipe 20 is inserted into the hollow drain pipe 10, and then the expansion pipe 20 is inflated through the high-pressure air pipe 40.

Reference is made to fig. 4. After inflation, the expanded tube 20 expands radially and axially. The radial expansion of the expansion pipe 20 can seal the hollow hole 11 on the hollow drain pipe 10, so that concrete 60 is prevented from entering the hollow drain pipe 10 from the hollow hole 11 during pouring, and the hollow drain pipe 10 is prevented from being blocked.

As can be seen from fig. 3 to 4, after inflation, the axial expansion of the expansion pipe 20 is much greater than the radial expansion thereof, and the hollow drainage pipe 10 has a limited length extending out of the two liners. In order to prevent the bulge from occurring, the length of the low pressure hose 21 must be smaller than the length of the hollow out drain pipe 10. However, in this case, the insertion depth of the low-pressure hose 21 into the hollow drain pipe 10 is shallow, and the prescribed operation position cannot be reached.

The high pressure hose 22 has poor expansibility, and the purpose of the high pressure hose 22 is to increase the insertion depth of the low pressure hose 21 into the hollow drain pipe 10 so that the low pressure hose 21 can reach a designated working position. After expansion of the low pressure hose 21, the high pressure hose 22 moves outwardly, leaving room for axial expansion of the low pressure hose 21.

In one of the improvements, the length of the high-pressure hose 22 is greater than the elongation of the low-pressure hose 21 after inflation. By the design, a part of the high-pressure hose 22 is always left outside the hollow drain pipe 10, and the insertion depth of the low-pressure hose 21 in the hollow drain pipe 10 can be intuitively known by measuring the length of the high-pressure hose 22 left outside the hollow drain pipe.

Why does not use a rigid hard tube? This is because the hollow drain pipe 10 is long, and the latest hollow drain pipe 10 is made of plastic, the hollow drain pipe 10 is inevitably bent after laying, the rigid hard pipe cannot be completely inserted into the hollow drain pipe 10, and the high-pressure hose 22 can be completely inserted into the hollow drain pipe 10. In addition, the high pressure hose 22 has windability, and the coiled high pressure hose 22 can greatly reduce the occupation of the operating space compared with a rigid hard tube.

Example two

Reference is made to fig. 5. Unlike in embodiment 1, four threaded holes are provided in the pipe joint 23, and radial stop pins 26 are screwed into the threaded holes, and the radial stop pins 26 are located in a certain hollow hole 11 of the hollow drain pipe 10 to limit the axial movement of the pipe joint 23.

The low pressure hose 21 will promote high pressure hose 22 and coupling 23 outwards to remove after aerifing, when the screw hole aligns with a certain fretwork hole 11, can screw in radial backing pin 26 in the screw hole, through the unblock of fretwork hole 11 to radial backing pin 26, makes coupling 23 no longer remove. Thus, the axial elongation of the low-pressure hose 21 can be limited, and the low-pressure hose 21 is prevented from forming a bulge after extending out of the hollow drain pipe 10.

Example III

Reference is made to fig. 6. In this embodiment, the pipe diameter of the high pressure hose 22 is larger than that of the low pressure hose 21, a sleeve 30 is provided between the high pressure hose 22 and the hollow drain pipe 10, and the sleeve 30 can move along the high pressure hose 22 to the side of the low pressure hose 21 and sleeve part of the low pressure hose 21 therein.

Reference is made to fig. 7. In this embodiment, the concrete 60 of the second lining has a casting length of 10m, and the hollow drain pipe 10 longitudinally penetrates the second lining, and a margin is left at two ends of the second lining. The right end of the hollow drain pipe 10 is provided with a blocking object such as an end cover 80, and the expansion pipe 20 is inserted from the left end of the hollow drain pipe 10. The length of the low pressure hose 21 is 9.3m and the length of the high pressure hose 22 is 1.5m.

During construction, the sleeve 30 is inserted into the hollow drain pipe 10. Since the sleeve 30 is inserted into the hollow drain pipe 10 to a small length, a metal hard pipe or a plastic hard pipe may be used.

Reference is made to fig. 8. The low pressure hose 21 is expanded into the sleeve 30 with a smaller radial expansion in the sleeve 30 than in the hollow drain pipe 10. The sleeve 30 is equivalent to lengthening the hollow drain pipe 10, and the low-pressure hose 21 entering the sleeve 30 is not bulged due to the restriction of the sleeve 30.

Example IV

In example 3, the expansion of the low pressure hose 21 causes an outward thrust to the sleeve 30, and if it is desired to counteract this, one would push the sleeve 30. Otherwise, after the sleeve 30 is separated, the low pressure hose 21 will extend out of the hollow drain pipe 10 and form a bulge.

Reference is made to fig. 9. In order to overcome the defect in embodiment 3, an inwardly protruding anti-back elastic claw 31 is provided on the sleeve 30, and the anti-back elastic claw 31 has elasticity and can be clamped in the hollowed-out hole 11.

Referring to fig. 10. Through the clamping of the anti-return elastic clamping jaw 31 and the hollow hole 11 on the hollow drain pipe 10, the sleeve 30 and the hollow drain pipe 10 can be clamped together, the sleeve 30 is prevented from being pushed out outwards by the low-pressure hose 21, and the low-pressure hose 21 stretches out of the hollow drain pipe 10 to form a bulge.

During disassembly, the anti-return elastic claw 31 is pulled outwards, the anti-return elastic claw 31 is disengaged from the hollowed-out hole 11 to be clamped, and then the sleeve 30 is pulled outwards. Obviously, the detachable clamping mode can replace manual work, so that the sleeve 30 is connected with the hollowed-out drain pipe 10.

The anti-back elastic claw 31 in fig. 9 and 10 adopts an external clamping mode, and the anti-back elastic claw 31 can also adopt an internal clamping mode.

Referring to fig. 10. An outwardly protruding anti-return elastic claw 31 is provided at the head end of the sleeve 30, and obviously, the inner clamping structure can also realize the clamping connection of the sleeve 30 and the hollow drain pipe 10.

The parts not described in detail are prior art. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (7)

1. An expansion pipe capable of being inserted into a hollowed-out drain pipe, which is characterized in that: the high-pressure hose is connected with the low-pressure hose; the low-pressure hose is positioned at the head end of the expansion pipe, and the head of the low-pressure hose is closed; the high-pressure hose is positioned at the tail end of the expansion pipe and is communicated with the high-pressure air source.

2. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 1, wherein: the high-pressure hose and the low-pressure hose are connected through a pipe joint.

3. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 1, wherein: and a plug is arranged at the head of the low-pressure hose and is used for sealing the head of the low-pressure hose.

4. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 1, wherein: the length of the high-pressure hose is greater than the elongation of the low-pressure hose after inflation.

5. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 2, wherein: the pipe joint is provided with a threaded hole, a radial stop pin is screwed in the threaded hole, and the radial stop pin is positioned in a certain hollowed hole of the hollowed-out drain pipe and used for limiting the axial movement of the pipe joint.

6. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 1, wherein: the pipe diameter of the high-pressure hose is larger than that of the low-pressure hose; a sleeve is arranged between the high-pressure hose and the hollow drain pipe, and can move along the high-pressure hose to one side of the low-pressure hose and sleeve part of the low-pressure hose therein.

7. An expansion pipe capable of being inserted into a hollow drain pipe as claimed in claim 6, wherein: the sleeve is provided with a backstop elastic claw which is clamped with the hollow hole on the hollow drain pipe and used for preventing the sleeve from retreating outwards.