CN219865097U - Low-level buried protection air pipe drainage facility - Google Patents

Abstract

The utility model discloses a low-level buried protection air duct drainage facility, which is characterized by comprising the following components: the air conditioner comprises a protection air pipe, an air shaft, a water seal water guide structure and a drainage structure, wherein one end of the protection air pipe is connected with the air shaft, the other side of the air shaft is provided with a water collecting well, the bottom in the air shaft is communicated with the inside of the water collecting well through the water seal water guide structure, and the drainage structure is arranged in the water collecting well. According to the utility model, condensed water and cleaning water in the protection air pipe flow into the ventilation shaft under the action of gravity, enter the water collecting well through the water seal water guide structure, and finally are pumped and discharged into the drainage trench of the pilot tunnel through the drainage structure, the installation height of the protection air pipe is lower than the bottom of the pilot tunnel, the condensed water and the cleaning water in the protection air pipe can still be discharged into the drainage trench of the pilot tunnel, a plurality of problems caused by the fact that the condensed water and the cleaning water in the protection air pipe cannot be normally discharged are avoided, and potential safety hazards caused by the fact that the protection air pipe is installed on the side wall of the pilot tunnel are avoided.

Description

Low-level buried protection air pipe drainage facility

Technical Field

The utility model relates to the technical field of ventilation and drainage facilities, in particular to a low-level buried protection air pipe drainage facility.

Background

When the protection ventilation design of the cave depot protection engineering is adopted, the protection air pipes which are buried in a hidden way are usually arranged on the outer sides of the coating layers on the two sides of the diversion cave, the installation height Cheng Jungao of the protection air pipes is arranged on the diffusion chamber and the ground of the diversion cave, condensed water and cleaning water in the protection air pipes can be discharged to the ground, and then the condensed water and cleaning water are discharged to a drainage trench at the bottom of the diversion cave through a floor drain arranged on the ground and finally discharged to the outside of the cave. However, in engineering application, the specification of the protection air pipe is large, the protection air pipe is arranged on the outer side of the coating layers on two sides of the pilot hole, so that the construction cost is high due to the fact that the digging surface of the pilot hole is too large, and the pilot hole collapse and other problems are easily caused in construction for areas with poor geological conditions. In order to reduce the safety problem in the pilot tunnel construction process and reduce the construction engineering cost, the installation elevation of the protection air pipe can be reduced, the protection air pipe is buried under the pilot tunnel bottom plate in a hidden mode, but at the moment, the installation elevation of the air pipe is lower than the elevation of a drainage ditch at the bottom of the pilot tunnel, so that condensed water and cleaning water in the protection air pipe cannot be discharged normally, accumulated in the protection air pipe, and the problems of corrosion, air pollution, air pipe blockage and the like of the protection air pipe are caused until the protection ventilation system cannot run normally.

Disclosure of Invention

The utility model mainly aims to provide a low-level buried protective air pipe drainage facility, which aims to solve the technical problem that condensed water and cleaning water in a protective air pipe are not smoothly discharged into a drainage trench of a pilot tunnel when the protective air pipe is buried under the pilot tunnel.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a low-level buried protective air duct drainage facility, comprising: the air conditioner comprises a protection air pipe, an air shaft, a water seal water guide structure and a drainage structure, wherein one end of the protection air pipe is connected with the air shaft, a water collecting well is arranged on the other side of the air shaft, the inner bottom of the air shaft is communicated with the inner part of the water collecting well through the water seal water guide structure, and the drainage structure is arranged in the water collecting well; the drainage structure is provided with a submersible pump, a first drainage pipe and a second drainage pipe, at least one submersible pump is arranged in the water collecting well, each submersible pump is connected with one first drainage pipe, the other end of each first drainage pipe extends out of the water collecting well part and is connected with one end of one second drainage pipe, and the other end of the second drainage pipe is arranged in a drainage ditch of the drainage hole.

As a further improvement of the present utility model, the water seal water guide structure includes: floor drain, third drain pipe, fourth drain pipe, ball valve and blowdown plug, the bottom is close to in the ventilation shaft one side of collecting pit sets up a floor drain, the fourth drain pipe unsettled in the collecting pit is inside and its one end is connected the ball valve, the other end of fourth drain pipe is connected the blowdown plug, the third drain pipe bury in under the ventilation shaft and its one end with the floor drain is connected, the other end of third drain pipe stretch into in the collecting pit and with the fourth drain pipe is close to the position of blowdown plug is connected perpendicularly.

As a further improvement of the utility model, the middle part of the third drain pipe is bent by 90 degrees, the fourth drain pipe is bent by 180 degrees at a position close to the ball valve, and the distance from the floor drain to the bent position of the fourth drain pipe is more than or equal to twice the distance from the bent position of the fourth drain pipe to the position where the fourth drain pipe is connected with the third drain pipe.

As a further improvement of the present utility model, the drainage structure further includes: the device comprises a check valve, a first gate valve, a pressure gauge, a second gate valve and a liquid level detector; every first drain pipe is last all to be provided with in proper order by water collecting wellhead portion to bottom the manometer first gate valve with the check valve is provided with the second gate valve on the second drain pipe, the liquid level detector set up in the water collecting well.

As a further improvement of the utility model, the inner bottom of the protective air pipe is provided with a slope to the ventilation shaft, and the inner bottom of the ventilation shaft is provided with a slope to the floor drain.

As a further improvement of the utility model, the mouth of the water collecting well is also provided with a cover plate, and the cover plate is provided with at least one round hole.

As a further improvement of the utility model, the low-level buried protective air pipe drainage facility further comprises a central control module which is electrically connected with the submersible pump, the first gate valve, the pressure gauge, the second gate valve and the liquid level detector respectively, wherein the central control module is used for receiving signal data sent by the pressure gauge and the liquid level detector and controlling the connection and disconnection of a power supply connected with the submersible pump, the first gate valve and the second gate valve respectively according to instructions.

The utility model has the beneficial effects that:

according to the utility model, the protection air pipe is buried under the bottom plate of the pilot tunnel and is connected to the ventilation shaft, meanwhile, the water collecting well is arranged close to the ventilation shaft, condensed water and cleaning water in the protection air pipe flow into the ventilation shaft under the action of gravity, the ventilation shaft is connected with the water collecting well through the water seal water guide mechanism, water in the ventilation shaft can enter the water collecting well through the water seal water guide mechanism, finally, the water in the ventilation shaft is pumped and discharged into a drainage trench of the pilot tunnel through the water collecting well, the installation height of the protection air pipe is lower than the bottom of the pilot tunnel, the condensed water and the cleaning water in the protection air pipe can still be discharged into the drainage trench of the pilot tunnel, a plurality of problems caused by the fact that the condensed water and the cleaning water in the protection air pipe cannot be normally discharged are avoided, and potential safety hazards caused by the fact that the protection air pipe is installed on the side wall of the pilot tunnel are avoided.

Description of the drawings:

FIG. 1 is a schematic diagram of a low-level buried protective duct drainage facility;

reference numerals illustrate:

1. a protective air pipe; 2. a ventilation shaft; 3. a water collection well; 31. a cover plate; 32. stopping the pump water level; 33. starting the pump water level; 34. alarming water level; 4. a water seal water guide structure; 41. a floor drain; 42. a third drain pipe; 43. a fourth drain pipe; 44. a ball valve; 45. a pollution discharge plug; 5. a drainage structure; 51. submersible pump; 52. a first drain pipe; 53. a second drain pipe; 54. a check valve; 55. a first gate valve; 56. a pressure gauge; 57. a second gate valve; 58. a liquid level monitor; 6. drainage trench; 7. and (5) guiding the hole to the ground elevation.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the described embodiments are merely some, but not all embodiments of the present utility model. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Fig. 1 shows an embodiment of a drainage facility for a low-level buried protective air duct 1 according to the present utility model, referring to fig. 1, in this embodiment, the drainage facility for a low-level buried protective air duct 1 includes: the air conditioner comprises a protection air pipe 1, an air shaft 2, a water collecting well 3, a water seal water guide structure 4 and a drainage structure 5, wherein one end of the protection air pipe 1 is connected with one side of the air shaft 2, the other side of the air shaft 2 is provided with the water collecting well 3, the inside of the air shaft 2 is connected with the inside of the water collecting well 3 through the water seal water guide structure 4, and the drainage structure 5 is arranged in the inside of the water collecting well 3.

Referring to fig. 1, a ventilation shaft 2 and a water collecting well 3 are both vertical shaft structures with concrete pouring, a protection air pipe 1 is buried under a bottom plate of a pilot tunnel in a hidden mode, and the water collecting well 3 is arranged close to the ventilation shaft 2 and far away from the protection air pipe 1; the protection air pipe 1 is used for matching the ventilation shaft 2 to realize the ventilation of the underground cave depot protection area and the ground surface, so that the problems that the bearing weight of the cave guiding structure is increased due to the fact that the protection air pipe 1 is arranged on the outer sides of the coating layers on the two sides of the cave guiding structure and the protection air pipe 1 is arranged on the outer sides of the coating layers on the two sides of the cave guiding structure to occupy the inner space of the cave guiding structure are avoided; the water collecting well 3 is used for collecting condensed water and cleaning water of the protective air pipe 1 discharged from the ventilation shaft 2.

Specifically, the slope of the slope toward the ventilation shaft 2 is set at the inner bottom of the protection air pipe 1, and the slope is not less than 0.5%, so that condensed water and cleaning water in the protection air pipe 1 can flow into the ventilation shaft 2 under the action of gravity.

Specifically, the slope of the slope floor drain 41 is set at the bottom in the ventilation shaft 2 and is not less than 1% so as to drain the condensate water and the cleaning water of the protection air duct 1 accumulated therein by gravity.

Further, the specification of the ventilation shaft 2 is determined according to the specification and the burying depth of the protection air pipe 1, the ventilation area is determined according to the system air quantity, and the height (h 4 is more than or equal to 200 mm) from the inner bottom of the ventilation shaft 2 to the inner bottom of the protection air pipe 1 is convenient for the condensation water and the cleaning water to be large in the protection air pipe 1, and the water seal water guide structure 4 has a certain water yield when the water is not smoothly discharged, so that the protection air pipe 1 is prevented from being blocked due to the fact that the water level in the ventilation shaft 2 is too high.

Further, the length of the water collecting well 3 is 1200mm, the width of the water collecting well 3 is the same as that of the ventilation shaft 2 and is not more than 800mm, and the distance from the leading hole ground to the bottom of the ventilation shaft 2 is far smaller than the distance from the leading hole ground to the bottom of the water collecting well 3, so that unsmooth drainage caused by the fact that the accumulated water level in the water collecting well 3 is higher than the bottom in the ventilation shaft 2 is avoided.

Further, the opening of the water collecting well 3 is further provided with a cover plate 31, the length and width of the cover plate 31 is slightly larger than that of the water collecting well 3, the cover plate 31 plays a role in preventing people or articles from falling into the water collecting well 3, and at least one round hole is formed in the cover plate 31 so as to penetrate through the first drain pipe 52 or the cable.

Wherein, see fig. 1, water seal water guiding structure 4 includes: the floor drain 41, the third drain pipe 42 and the fourth drain pipe 43 are arranged on one side, far away from the protection air pipe 1, of the inner bottom of the ventilation shaft 2, the third drain pipe 42 is buried under the ventilation shaft 2, the fourth drain pipe 43 is suspended in the water collecting well 3, one end of the fourth drain pipe 43 is connected with the ball valve 44, and the other end of the fourth drain pipe 43 is connected with the pollution discharge plug 45; one end of the third drain pipe 42 is connected to the floor drain 41, and the other end of the third drain pipe 42 is connected to the fourth drain pipe 43 vertically.

Further, the middle part of the third drain pipe 42 is bent by 90 degrees, and the third drain pipe 42 and the fourth drain pipe 43 form a U-shaped structure, so that part of water still is accumulated in the water seal water guide structure 4 when no water is discharged in the protective air pipe 1, the inner space of the ventilation shaft 2 and the water collecting well 3 can be separated, and air pollution caused by turbid air in the water collecting well 3 entering the ventilation shaft 2 and the protective air pipe 1 through the water seal water guide structure 4 is avoided.

Further, the water seal water guide structure 4 further comprises a ball valve 44 and a pollution discharge plug 45, one end of a fourth water pipe is connected with the ball valve 44, the other end of the fourth water pipe 43 is connected with the pollution discharge plug 45, and the pollution discharge plug 45 is convenient for overhauling the water seal water guide structure 4; the part of the fourth drain pipe 43 close to the ball valve 44 is bent 180 degrees, so that the water discharged by the water seal water guide structure 4 is prevented from spraying water to the check valve 54, the first gate valve 55, the pressure gauge 56 and other parts to damage the parts.

Preferably, in the present embodiment, the distance from the bending part of the fourth drain pipe 43 to the floor drain 41 (the maximum negative pressure water head height: h1=p/9.8+50, mm, P is the maximum negative pressure in the ventilation shaft 2, and the unit is Pa) is greater than or equal to twice the distance from the bending part of the fourth drain pipe 43 to the position where it is connected to the third drain pipe 42 (the water seal height: h2 is greater than or equal to 100. Gtoreq.h1/2, mm), so that when water is stored in the ventilation shaft 2, the bottom of the ventilation shaft 2 has enough water pressure to squeeze the water into the water seal water guide assembly, and the water guide efficiency of the water guide assembly is ensured; the vertical distance from the floor drain 41 to the drain plug 45 (the height h=h1+h2+100, mm of the water seal water guide structure 4) is not less than 200mm (the maintenance height h3 of the drain plug 45 is not less than 200 mm) from the drain plug 45 to the alarm water level 34.

Wherein, referring to fig. 1, the drainage structure 5 comprises: the water collecting well 3 is provided with at least one submersible pump 51 at the inner bottom thereof, each submersible pump 51 is connected with one end of one first water drain pipe 52, the other end of each first water drain pipe 52 is connected with one end of one second water drain pipe 53, and the other end of the second water drain pipe 53 is arranged in a drainage trench of the guide hole; the water in the water collecting well 3 can be pumped and discharged into the first drain pipe 52 by the submersible pump 51, and then flows into the drainage trench of the drainage hole through the second drain pipe 53, so that the water in the water collecting well 3 is pumped and discharged.

Specifically, the drainage structure 5 further comprises a check valve 54, a first gate valve 55, a pressure gauge 56, a second gate valve 57 and a liquid level monitor 58, wherein the pressure gauge 56, the first gate valve 55 and the check valve 54 are arranged on each first drain pipe 52 from the mouth of the water collecting well 3 to the bottom of the water collecting well in sequence, the second gate valve 57 is arranged on the second drain pipe 53, and the liquid level monitor is arranged in the water collecting well 3; the check valve 54 is used for preventing water in the first drain pipe 52 from flowing back to the bottom of the water collecting well 3, the first gate valve 55 is used for controlling the on-off of the first drain pipe 52, the pressure gauge 56 is used for monitoring the internal pressure of the first drain pipe 52, the second gate valve 57 is used for controlling the on-off of the second drain pipe 53, and the liquid level detector is used for detecting the liquid level in the water collecting well 3 in real time; because the drainage structure 5 pumps and discharges water in the water collecting well 3 to the mouth of the water collecting well 3, the operation efficiency of the submersible pump 51 is limited, the pumping and discharging efficiency of the drainage structure 5 is lower when the depth of the water collecting well 3 is larger, and when the depth of the water collecting well 3 reaches a certain value, the pumping and discharging function of the drainage structure 5 cannot be completed by the submersible pump 51; since the inner space of the first water discharge pipe is limited, the water supplied by the submersible pump 51 continuously passes through the check valve 54 to gradually increase the inner pressure of the first water discharge pipe 52, and when the pressure in the first water discharge pipe 52 reaches the threshold value, the water in the first water discharge pipe 52 flows to the second water discharge pipe 53; in this way, drainage of accumulated water in the water collecting wells 3 of different depths can be achieved.

Further, a pump stopping water level 32, a pump starting water level 33 and an alarm water level 34 are arranged in the water collecting well 3, the pump stopping water level 32 is larger than the distance from the bottom of the water collecting well 3 to the top of the submersible pump 51, the alarm water level 34 is at least 200mm lower than the bottom of the pollution discharge plug 45, and the pump starting water level 33 is slightly lower than the alarm water level 34;

preferably, in the present embodiment, two sets of submersible pumps 51, two sets of first drain pipes 52, two sets of first gate valves 55, two sets of pressure gauges 56 are the preferred embodiments; the water collecting well 3 is internally provided with a pump stopping water level 32, a pump starting water level 33 and an alarm water level 34, wherein the pump stopping water level 32 is larger than the distance from the bottom of the water collecting well 3 to the top of the submersible pump 51, the alarm water level 34 is at least 200mm lower than the bottom of the pollution discharge plug 45, and the pump starting water level 33 is slightly lower than the alarm water level 34; if the design can regulate and control the drainage structure 5 according to actual conditions, when the actual liquid level reaches the pump starting water level 33, a group of submersible pumps 51 are alternately opened, so that the long-time work of one submersible pump 51 is avoided, and the service life is reduced; when the actual liquid level is higher than the alarm water level 34, two groups of submersible pumps 51 are opened, and the two groups of submersible pumps 51 operate simultaneously, so that the pumping and discharging efficiency of the water discharging structure 5 can be improved, and the water in the water collecting well 3 is prevented from flowing back into the ventilation shaft 2; all the submersible pumps 51 are controlled to be closed when the actual water level is lower than the pump-stopping water level 32, so that the submersible pumps 51 are prevented from being damaged due to long-time exposure to air when the submersible pumps 51 are operated.

In order to realize the control of the components of the drainage structure 5, on the basis of the above embodiment, the drainage facility of the low-level buried protection air pipe 1 further comprises a central control module electrically connected with the submersible pump 51, the first gate valve 55, the pressure gauge 56, the second gate valve 57 and the liquid level detector respectively, wherein the central control module is used for receiving signal data sent by the pressure gauge 56 and the liquid level detector and controlling connection and disconnection of the power supply of the submersible pump 51, the first gate valve 55 and the second gate valve 57 according to instructions.

It should be noted that, in this embodiment, the central control module focuses on the working principle of receiving signals sent by the pressure gauge 56 and the liquid level detector, and the control principle of the submersible pump 51, the first gate valve 55 and the second gate valve 57 respectively, and the structure and the installation position thereof are not focused on the embodiment, and are not repeated in the present embodiment; similarly, the present embodiment focuses on the operating principles of the submersible pump 51, the first gate valve 55, the pressure gauge 56, the second gate valve 57, and the liquid level detector, and the structure thereof is not an important point of the present embodiment, and is the prior art, and the structure thereof will not be described in detail.

In this embodiment, the condensed water and the cleaning water in the protective air pipe 1 flow into the ventilation shaft 2 under the action of gravity, and the water accumulated in the ventilation shaft 2 flows into the third drain pipe 42 under the action of gravity, and enters the water collecting well 3 through the fourth drain pipe 43 under the action of the pressure difference between the input end and the output end of the water seal water guiding structure 4; the liquid level detector monitors the liquid level in the water collecting well 3 in real time and transmits data to the central control module, when the actual liquid level in the water collecting well 3 reaches the pump starting water level 33, the central control module sends out an instruction to start one of the water pumps, opens a first gate valve 55 on a first water drain pipe 52 connected with the submersible pump 51, controls to open a second gate valve 57, closes a second gate valve 57 on a second water drain pipe 53 connected with the rest of the submersible pump 51, the submersible pump 51 applies work to pump water in the water collecting well 3 into the first water drain pipe 52, water in the first water drain pipe 52 can not flow back to the bottom of the water collecting well when flowing through a check valve 54, water in the first water drain pipe 52 gradually accumulates, the pressure gradually increases, and when the pressure reaches a certain threshold value, the water in the first water drain pipe 52 flows into the second water drain pipe 53 and finally flows into a drainage trench of a drainage hole through the second water drain pipe 53; when the actual liquid level in the water collecting well 3 reaches the alarm water level 34, the central control module sends out instructions to start all water pumps, open all first gate valves 55 and second gate valves 57 so as to maximize the pumping and discharging efficiency of the water discharging structure 5 and avoid the water in the water collecting well 3 from flowing back into the ventilation shaft 2 due to the fact that the actual liquid level is higher than the water sealing water guiding structure 4; when the actual liquid level in the water collecting well 3 is lower than the pump stopping water level 32, the central control module sends out instructions to close all the water pumps and the first gate valve 55 and the second gate valve 57, so that damage caused by long-time exposure to air when the submersible pump 51 works is avoided.

In the above process, the submersible pump 51 and the first gate valve 55 connected to the first drain pipe 52 of the submersible pump 51 can be alternately started by the control module, so that the long-time operation of the single submersible pump 51 and the reduction of the service life can be avoided. Meanwhile, the water seal water guide structure 4 formed by the first water drain pipe 52 and the second water drain pipe 53 can block the inner space of the ventilation shaft 2 and the water collecting well 3, so that the air circulation efficiency between the cave depot protection area and the ground surface is reduced due to the fact that the inner air of the ventilation shaft 2 is prevented from being split into the water collecting well 3.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (6)

1. A low-level buried protective air duct (1) drainage facility, characterized by comprising: the novel air conditioner comprises a protection air pipe (1), an air shaft (2), a water seal water guide structure (4) and a drainage structure (5), wherein one end of the protection air pipe (1) is connected with the air shaft (2), a water collecting well (3) is arranged on the other side of the air shaft (2), the inner bottom of the air shaft (2) is communicated with the inside of the water collecting well (3) through the water seal water guide structure (4), and the drainage structure (5) is arranged in the water collecting well (3); drainage structure (5) are provided with immersible pump (51), first drain pipe (52) and second drain pipe (53), set up at least one immersible pump (51) in sump pit (3), every immersible pump (51) all are connected with a first drain pipe (52), and the other end of every first drain pipe (52) all stretches out sump pit (3) oral area and be connected with the one end of a second drain pipe (53), the other end of second drain pipe (53) sets up in the escape canal of drawing the hole.

2. The low-level buried protective air duct (1) drainage facility according to claim 1, characterized in that the water seal water guiding structure (4) comprises: floor drain (41), third drain pipe (42), fourth drain pipe (43), ball valve (44) and blowdown plug (45), be close to in ventilation shaft (2) one side of collecting pit (3) sets up floor drain (41), fourth drain pipe (43) unsettled in collecting pit (3) is inside and its one end is connected ball valve (44), the other end of fourth drain pipe (43) is connected blowdown plug (45), third drain pipe (42) bury in under ventilation shaft (2) and its one end with floor drain (41) are connected, the other end of third drain pipe (42) stretch into in collecting pit (3) and with fourth drain pipe (43) are close to the position of blowdown plug (45) is connected perpendicularly.

3. The low-level buried protective air duct (1) drainage facility according to claim 2, characterized in that the middle part of the third drain pipe (42) is bent by 90 °, the fourth drain pipe (43) is bent by 180 ° near the ball valve (44), and the distance from the floor drain (41) to the bent part of the fourth drain pipe (43) is greater than or equal to twice the distance from the bent part of the fourth drain pipe (43) to the position where it connects the third drain pipe (42).

4. A low-level buried protective air duct (1) drainage facility according to claim 3, characterized in that the slope of the inner bottom of the protective air duct (1) is set to the slope of the ventilation shaft (2), and the slope of the inner bottom of the ventilation shaft (2) is set to the slope of the floor drain (41).

5. The low-level buried protective air duct (1) drainage arrangement according to claim 1, characterized in that the drainage structure (5) further comprises: a check valve (54), a first gate valve (55), a pressure gauge (56), a second gate valve (57) and a liquid level detector; every first drain pipe (52) is gone up and is all provided with in proper order by sump pit (3) oral area to bottom manometer (56) first gate valve (55) with check valve (54), be provided with second gate valve (57) on second drain pipe (53), the liquid level detector set up in sump pit (3).

6. The drainage facility of the low-level buried protective air pipe (1) according to claim 1, wherein a cover plate (31) is further arranged at the mouth of the water collecting well (3), and at least one round hole is formed in the cover plate (31).