CN216965646U - Outer drain pipe freeze-proof device in cold area tunnel engineering hole - Google Patents

Abstract

The utility model discloses an anti-freezing device for an outer drainage pipe of a tunnel engineering hole in a cold region, which comprises a plurality of drainage pipe joints alternately arranged with main pipe joints, wherein the main pipe joints are connected with the drainage pipe joints through flange plates and high-strength bolts; the drainage pipe joint comprises a branch pipe which is obliquely arranged on the outer wall of the top of the main pipe joint and is communicated with the main pipe joint, a sealing plate is arranged at the tail end of the branch pipe, a plurality of air supply holes are formed in the sealing plate, a connecting pipe leading into the branch pipe is arranged in each air supply hole, the tail end of the connecting pipe is communicated with a high-pressure air pipe, and a gate valve is further arranged on the connecting pipe; according to the utility model, accumulated water in the long-distance drainage pipeline is cleaned up mainly through high-pressure gas, the phenomenon that the accumulated water in the drainage pipeline is frozen to influence the normal use of the drainage pipeline is avoided, the cost of additionally paying out a thermal insulation cotton wrapping layer is avoided, and the cost investment is reduced.

Description

Outer drain pipe freeze-proof device in cold area tunnel engineering hole

Technical Field

The utility model relates to the field of tunnel engineering construction devices, in particular to an anti-freezing device for an outer drainage pipe of a tunnel engineering in a cold region.

Background

In the tunnel work progress, along with the increase of tunnel excavation length, its infiltration volume also increases thereupon, must discharge occasionally round the clock, in order to make the water that does not flow in the pipeline freeze the bad pipeline not freezing in severe cold season, two kinds of solution methods are generally taken to prior art: one is to add heat insulation material outside the pipeline, which can keep the temperature of water in the pipeline above the freezing point in a short time, prevent the water from expanding and tearing the pipe wall after freezing, if the water in the pipeline does not flow for a long time, the method has undesirable effect; the other method is to install a drain valve at the low point of the trend of the pipeline, namely, a welding screw head at the position where water can be stored after water cut off, and also can drain water stored in the pipeline, but the pipeline layout is influenced by the terrain factor and other structures and fluctuates, so that the drain valves need to be welded and installed at all pipelines with residual water, the quantity is large, and a part of dead water area exists between the pipeline and the valve, so that the freezing failure is easily caused.

The method is not only time-consuming and material-consuming, but also has limited anti-freezing effect. Drainage pipe is examining and repairing and maintenance in-process, still often because ponding in the pipeline is frozen, and long distance drainage pipe unfreezes the difficulty, and hard consuming time, inefficiency, the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an anti-freezing device for an external drainage pipe of a tunnel engineering in a cold area, and solves the problems that in the prior art, in order to prevent the pipeline damage caused by freezing of accumulated water in a drainage pipeline in the cold area or season, a mode of wrapping the pipeline by heat-insulating cotton is mostly adopted, the anti-freezing effect is limited, time and labor are consumed, the pipeline is difficult to thaw in a long distance, the cost is high, and the efficiency is low.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: an anti-freezing device for an outer drainage pipe of a tunnel engineering tunnel in a cold region comprises a plurality of drainage pipe sections which are alternately arranged with main pipe sections, wherein the main pipe sections are connected with the drainage pipe sections through flange plates and high-strength bolts; the drainage pipe section sets up on being responsible for festival top outer wall including the slope to with the small transfer line of being responsible for the festival intercommunication, the small transfer line end is equipped with seals the board, seal and seted up a plurality of air feed holes on the board, the downthehole connecting pipe that accesss to in the small transfer line that is equipped with of air feed, connecting pipe end and high-pressure blast pipe intercommunication still be equipped with the gate valve on the connecting pipe.

In particular, the branch conduits are oriented in a direction opposite to the direction of water flow within the main conduit.

Particularly, the included angle between the branch pipeline and the main pipeline section is 30-45 degrees.

Particularly, the inner wall of the branch pipeline is provided with a speed increasing ring which is funnel-shaped and is folded towards the axis of the branch pipeline along the wind direction.

Particularly, the air supply hole is internally provided with internal threads, the connecting pipe is an external thread pipe, and the connecting pipe is in threaded connection with the air supply hole in the sealing plate.

Compared with the prior art, the utility model has the following advantages and beneficial effects: according to the utility model, accumulated water in the long-distance drainage pipeline is removed completely through high-pressure gas, the phenomenon that the accumulated water in the drainage pipeline is frozen to influence the normal use of the drainage pipeline is avoided, the cost of additionally paying out a thermal insulation cotton wrapping layer is avoided, and the cost investment is reduced. Meanwhile, the utility model not only can be used for preventing freezing of the drainage pipeline during winter construction of tunnel engineering, but also can be used for cleaning accumulated water in the drainage pipeline, the accumulated water in the pipeline can be cleaned for about 300-500 m at one time according to different wind pressures, the cleaning length of the accumulated water in the drainage pipeline can be increased on the premise of increasing the number of the wind supply ports of the sealing steel plate and increasing the capacity of the wind supply equipment, and the utility model has strong applicability and popularization.

Drawings

FIG. 1 is a schematic view of the structure of the apparatus of the present invention.

The definitions of the reference symbols in the figures are: a main pipe section-1; a drain pipe section-2; a flange-21; a branch conduit-22; a sealing plate-23; a supply air hole-24; a connecting tube-25; a high-pressure air duct-26; a gate valve-27; speed-up ring-28.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so as to further understand the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions.

As shown in fig. 1, the anti-freezing device for the outer drainage pipe of the tunnel engineering tunnel in the cold region comprises a plurality of drainage pipe joints 2 which are alternately arranged with main pipe joints 1, wherein the main pipe joints 1 are connected with the drainage pipe joints 2 through flange plates 21 and high-strength bolts; the drainpipe section 2 is arranged on the outer wall of the top of the drainage pipeline in an inclined mode and is communicated with the drainage pipeline, a branch pipeline 22 is arranged at the tail end of the branch pipeline 22 and is provided with a sealing plate 23, a plurality of air supply holes 24 are formed in the sealing plate 23, a connecting pipe 25 leading into the branch pipeline 22 is arranged in the air supply holes 24, the connecting pipe 25 is communicated with a high-pressure air pipe 26 at the tail end, and a gate valve 27 is further arranged on the connecting pipe 25.

In the utility model, the pipe diameters of the main pipe joint 1 and the drain pipe joint 2 are consistent, the two ends of a drain pipe of the main pipe joint 1 and the drain pipe joint 2 are respectively welded with the flange plates 21 for connecting the main pipe joint 1 and the drain pipe joint 2, the flange plates 21 are reinforced by high-strength bolts and are isolated from water by annular rubber sealing gaskets, so that the mounting is simple and the dismounting is convenient; the branch pipeline 22 is obliquely crossed with a drainage pipeline of the drainage pipeline section 2, and a main branch pipeline is obliquely crossed to form a special-shaped tee structure; the tail end of the branch pipeline 22 is sealed by adopting a steel plate with the thickness of 10mm as a sealing plate 23, at least two air supply holes 24 are reserved in the sealing plate 23, and the number of the air supply holes 24 can be properly increased or decreased according to the length of an outer drainage anti-freezing pipeline, so that the branch pipeline is suitable for drainage pipelines with different lengths, and the applicability of the device is increased; in the device of the present invention, the connecting pipe 25 is connected with the branch pipe 22 through the air supply hole 24 on the sealing plate 23 for inputting high pressure gas; in one embodiment, the gate valve 27 is separately installed at the end of each connecting pipe 25 for controlling the opening and closing of the high-pressure air supply process, and the installation is simple and the use is safe and convenient. The lower surface of the sealing plate 23 is provided with a circular external thread bulge which is matched with an internal thread opening at the tail end of the branch pipeline 22. Meanwhile, the side wall of the sealing plate 23 is also provided with a bayonet, so that the sealing plate can be conveniently installed at the tail end of the branch pipeline 22 and removed in the later period.

The actual working principle of the utility model is as follows: when the drainage pipeline drains normally, the gate valve 27 at the end of the connecting pipe 25 is in a closed state, and at this time, the drainage pipeline drains the water in the tunnel to the outside of the tunnel normally. When entering into in cold season tunnel construction pause and need the interior ponding of discharge pipe, insert high-pressure tuber pipe 26 at connecting pipe 25 end to open gate valve 27, let in pressurized air through high-pressure tuber pipe 26 in to drainage pipe, the inside air of entering drainage pipe this moment gets into in the drainage pipe along branch pipe 22, and moves ahead along the drainage direction, thereby takes out drainage pipe with intraductal ponding. When the drainage pipeline is longer, the air quantity of the air supply equipment can be increased, on one hand, accumulated water in the pipeline is blown to move forward, on the other hand, the air flow at the upper part of the accumulated water is accelerated, and therefore more water is taken away.

As a preferred embodiment, the branch conduits 22 are directed in the opposite direction to the water flow in the main pipe section 1.

In this embodiment, the branch duct 22 faces the drain pipe and the end of the drain opening of the main pipe joint 1, so that the high-pressure air injected into the drain pipe discharges the accumulated water in the drain pipe from the end of the drain opening in the draining direction.

As a preferred embodiment, the included angle between the branch pipeline 22 and the drainage pipeline is 30-45 degrees.

In the embodiment, the selected included angle is 30-45 degrees, and the high-pressure air pipe 26 is matched to clean accumulated water in the pipeline within the distance of 300-500 m at one time.

As a preferred embodiment, an accelerating ring 28 is provided on the inner wall of the branch duct 22, and the accelerating ring 28 is funnel-shaped and converges in the wind direction toward the axis of the branch duct 22.

In this embodiment, the effect of the speed-increasing ring 28 is that after the high-pressure gas in the high-pressure air pipe 26 enters the branch pipe 22, the flow rate of the high-pressure gas is increased when the high-pressure gas passes through the speed-increasing ring 28, so that the thrust for pushing the accumulated water in the pipe to advance is increased, the air flow rate above the accumulated water can be further increased, and more accumulated water in the pipe is driven in an auxiliary manner.

In a preferred embodiment, the air supply hole 24 is internally provided with an internal thread, the connecting pipe 25 is an externally threaded pipe, and the connecting pipe 25 is in threaded connection with the air supply hole 24 on the sealing plate 23.

In this embodiment, the air supply hole 24 and the connecting pipe 25 are connected through threads, the operation of the connecting process is simple and fast, and the air supply hole can be quickly detached and transferred to other stations for continuous use in the later period. And is convenient for maintenance after disassembly.

The terms "connected" and "fixed" in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the above terms in the present invention is understood.

In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. are used in the orientation or positional relationship indicated only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element referred to must have a particular orientation and therefore should not be construed as limiting the present invention.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the utility model has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. An anti-freezing device for an outer drainage pipe of a tunnel engineering tunnel in a cold region comprises a plurality of drainage pipe joints (2) which are alternately arranged with main pipe joints (1), wherein the main pipe joints (1) are connected with the drainage pipe joints (2) through flange plates (21) and high-strength bolts; the water draining pipe joint is characterized in that the water draining pipe joint (2) is arranged on the outer wall of the top of a water draining pipe in an inclined mode and communicated with the water draining pipe, a sealing plate (23) is arranged at the tail end of the branch pipe (22), a plurality of air supply holes (24) are formed in the sealing plate (23), a connecting pipe (25) leading into the branch pipe (22) is arranged in each air supply hole (24), the tail end of the connecting pipe (25) is communicated with a high-pressure air pipe (26), and a gate valve (27) is further arranged on the connecting pipe (25).

2. The antifreeze apparatus for the drainage pipe of the tunnel engineering in the cold area according to claim 1, wherein the branch pipe (22) is directed in the direction opposite to the water flow direction in the main pipe section (1).

3. The antifreeze apparatus for the drainage pipe of the tunnel engineering in the cold area according to claim 1, wherein the angle between the branch pipe (22) and the drainage pipe is 30-45 °.

4. The anti-freezing device for the outer drainage pipe of the tunnel engineering tunnel in the cold region according to claim 1, wherein the inner wall of the branch pipe (22) is provided with a speed-increasing ring (28), and the speed-increasing ring (28) is funnel-shaped and is folded towards the axis of the branch pipe (22) along the wind direction.

5. The anti-freezing device for the drain pipe in the tunnel engineering tunnel in the cold region according to claim 1, wherein the air supply hole (24) is internally provided with internal threads, the connecting pipe (25) is an external threaded pipe, and the connecting pipe (25) is in threaded connection with the air supply hole (24) on the sealing plate (23).

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