CN216515730U - Water drainage and gas barrier structure of comprehensive pipe rack natural gas cabin and comprehensive pipe rack - Google Patents

Abstract

The utility model discloses a water and gas barrier structure of a natural gas cabin of a comprehensive pipe rack and the comprehensive pipe rack, wherein the water and gas barrier structure comprises: a drainage channel located below the firewall; the drain channel includes: the water storage part is connected with the water inlet part and the water outlet part; the drainage channel is communicated with drainage side channels on two sides of the firewall, and the highest liquid level height of the water inlet part is higher than that of the water outlet part; go out water part and be provided with the choke structure, the choke structure includes: the cross section of the water tank is gradually reduced from top to bottom along the height direction; the lower end of the water tank is provided with a plugging port; the air blocking piece is arranged in the water tank, and when water in the drainage channel is lower than the plugging port, the air blocking piece can be positioned at the plugging port to plug the drainage channel. The utility model can solve the drainage problem of the natural gas cabin of the comprehensive pipe gallery, reduce the water collecting pit and simultaneously eliminate the hidden trouble of natural gas leakage of adjacent fireproof subareas.

Description

Water drainage and gas barrier structure of comprehensive pipe rack natural gas cabin and comprehensive pipe rack

Technical Field

The utility model relates to the technical field of drainage of a comprehensive pipe rack, in particular to a drainage and air-blocking structure of a natural gas cabin of the comprehensive pipe rack and the comprehensive pipe rack.

Background

Along with building vigorously of city utility tunnel, city utility tunnel technique also steadily promotes, and future city utility tunnel will step by step the technological intellectuality, and equipment lightweight to reduce energy and manpower consumption, correspondingly, utility tunnel structure also should step by step be adjusted and improve, thereby makes utility tunnel reach green, the purpose that economic was suitable for.

At present, according to standard specifications, the natural gas cabin of the comprehensive pipe gallery is provided with a fireproof subarea every 200m and is separated by a fireproof door. In general, 1 water collecting pit is arranged near a fire door of a fire partition, and an explosion-proof submersible sewage pump is arranged in the pit. Therefore, each kilometer of the comprehensive pipe gallery is provided with 5 explosion-proof submersible sewage pumps, so that the whole urban comprehensive pipe gallery calculates, and the number of the explosion-proof submersible sewage pumps in the natural gas cabin is not small. Although the natural gas cabin has less water accumulation, the more equipment, the larger investment, the more energy consumption and the more daily maintenance are, which is a contradiction between technical specifications and actual use. On one hand, in terms of technical specifications, when an accident occurs in the natural gas cabin, natural gas cannot be leaked to other adjacent fireproof subareas, so that the accident range is reduced; on the other hand, when the fire-proof partition is in actual use, the drainage channels of the adjacent fire-proof partitions are directly communicated, so that water collecting pits are reduced, an explosion-proof submersible sewage pump is reduced, and green design and energy-saving design are realized. However, the drainage channels communicating with adjacent fire zones provide a diffuse outlet for the leaking natural gas.

Simultaneously, every sump pit or drainage channel in natural gas cabin all need set up the moisturizing terminal alone, and every piping lane sets up one set of water charging system at least promptly to prevent when the sump pit liquid level reduces, the drain pipe end exposes in the air. As the drainage pipes of all the subareas of the natural gas cabin are communicated, once natural gas in a certain fireproof subarea leaks, the natural gas is easy to leak to other fireproof subareas through the end head of the exposed drainage pipe, and the accident area is enlarged. Therefore, the water replenishing system has the meaning of forming water seal. Every natural gas cabin sump pit all need set up 1 level gauge, one set of moisturizing pipeline and valve, forms water charging system through piping lane distal end moisturizing controller and moisturizing pump. Therefore, the natural gas cabin is required to be monitored for water supplement while draining water, and the system is complex, the number of devices is large, and the manufacturing cost is high.

In the prior art, as shown in fig. 1 and 2, adjacent fire prevention partitions 01 are separated by a fire wall 02, 1 catch pit 03 is arranged near a fire door 021, and an explosion-proof submersible sewage pump 031 is arranged inside. The bottom plate upper surface of utility tunnel has vertical slope and horizontal slope, and its horizontal slope sets up downwards to the one side slope of drainage side ditch 04, and the utility tunnel oozes water and collects the sump pit 03 through the drainage side ditch 04 of utility tunnel bottom plate in, when ponding reaches a quantitative, arranges the utility tunnel outside by explosion-proof submersible sewage pump 031.

However, according to the technical specification, the utility tunnel is divided every 200m, the adjacent fire-proof subareas 01 are separated by the fire-proof wall 02, and a water collecting pit 03 needs to be arranged, but actually, the water collecting amount of the natural gas cabin is very small, so that under the technical condition, the explosion-proof submersible sewage pump 031 has the defects of large quantity of equipment, large investment, high energy consumption, high daily maintenance, manpower and material resource waste, and is not in line with the development trend of green design and energy-saving design.

There is also a drainage and air-blocking structure for the natural gas cabin of the utility tunnel in the prior art, as shown in fig. 3 and 4, the adjacent fire-proof subareas 01 are separated by fire-proof walls 02, and meanwhile, the two side drainage side ditches 04 are isolated without a water collecting pit, and the two side drainage side ditches 04 are directly communicated by a drainage pipe 05. The utility tunnel's bottom plate upper surface has vertical slope and horizontal slope, and its horizontal slope sets up downwards to one side slope of drainage side ditch 04, and when drainage side ditch 04 had ponding current to pass through, directly arrange downstream fire prevention subregion 01 through drain pipe 05 until flowing into final sump pit, finally discharge natural gas cabin piping lane by explosion-proof submersible sewage pump.

However, although the technology reduces the equipment investment, the technology has great safety hazard. Because the natural gas cabin collects a small amount of water, the interior of the drain pipe 05 directly communicated with the drain gutter 04 is normally empty, that is, the adjacent fire-proof subareas 01 on both sides of the fire-proof wall 02 are actually communicated spatially. Therefore, when a gas leakage accident occurs in the natural gas cabin, the adjacent fire prevention subareas 01 cannot be physically and effectively separated, the arrangement of the fire prevention wall 02 is similar to a nominal arrangement, and leaked natural gas can be diffused to the adjacent fire prevention subareas 01 from the water discharge pipe 05.

Therefore, the inventor provides a water and gas barrier structure of a natural gas cabin of a comprehensive pipe gallery and the comprehensive pipe gallery by experience and practice of related industries for many years so as to overcome the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a drainage and air-blocking structure of a natural gas cabin of a comprehensive pipe rack and the comprehensive pipe rack, which can solve the drainage problem of the natural gas cabin of the comprehensive pipe rack, reduce a water collecting pit, simultaneously eliminate the hidden danger of natural gas leakage of adjacent fireproof subareas and achieve the purposes of green design, economy, applicability, safety and high efficiency.

The specific technical scheme in the embodiment of the utility model is as follows:

a drainage and gas barrier structure of a utility tunnel natural gas hold, the drainage and gas barrier structure of a utility tunnel natural gas hold comprising: a drainage channel located below the firewall; the firewall has a first side facing the first fire zone and a second side facing the second fire zone; drainage channel sets up in utility tunnel's the bottom plate, drainage channel includes: the water storage device comprises a water inlet part positioned on a first side of the firewall, a water outlet part positioned on a second side of the firewall, and a water storage part connected with the water inlet part and the water outlet part; the drainage channel is communicated with drainage side channels on two sides of the firewall, and the highest liquid level of the water inlet part is higher than that of the water outlet part; the water outlet part is provided with a gas blocking structure, and the gas blocking structure comprises: the cross section of the water tank is gradually reduced from top to bottom along the height direction; the lower end of the water tank is provided with a plugging port; the air blocking piece is arranged in the water tank, and when the water in the drainage channel is lower than the plugging port, the air blocking piece can be positioned at the plugging port to plug the drainage channel; when water in the drainage channel exceeds the plugging port, the air blocking piece can be far away from the plugging port and float in the water tank.

In a preferred embodiment, the gas barrier has an average density less than the density of water.

In a preferred embodiment, the air blocking piece is a round ball, and the cross section of the plugging port is a round hole.

In a preferred embodiment, the inner cavity of the water tank is a conical hole, the lower part of the water tank is provided with a drainage channel section with one end being a cylindrical hole, and the center of the cylindrical hole coincides with the center of the conical hole.

In a preferred embodiment, a dimension of the drain passage in a width direction of the utility tunnel is equal to or less than a width of the drain gutter.

In a preferred embodiment, the bottom surface of the water holding portion is a horizontal surface.

In a preferred embodiment, a dimension of the drain passage in a width direction of the utility tunnel is equal to or less than a width of the drain gutter.

In a preferred embodiment, the size of the drainage channel along the width direction of the utility tunnel is 100-200 mm.

In a preferred embodiment, the bottom of the bottom plate has a downwardly protruding projection at a position corresponding to the firewall, and the drainage channel is opened in the projection.

In a preferred embodiment, the drainage channel is provided in the bottom plate by means of integral casting.

The utility model provides a utility tunnel the interval is equipped with a plurality of fire walls in the utility tunnel and is used for separating into a plurality of fire prevention subregion, every with the natural gas cabin the bottom one side of fire prevention subregion all is equipped with the gutter, the utility tunnel include as above the drainage of utility tunnel natural gas cabin choke structure.

The technical scheme of the utility model has the following remarkable beneficial effects:

to utility tunnel natural gas cabin, provide a drainage and hinder choke structure, this utility tunnel natural gas cabin's drainage and hinder choke structure includes: a drainage channel under the fire wall and an air blocking structure at the water outlet part of the drainage channel. Wherein, this choke structure includes the basin and sets up the choke spare in the basin. Specifically, the average density of the air blocking piece is smaller than that of water, so that when the natural gas cabin of the utility tunnel is in a drainage state, the air blocking piece can float in the water tank, and at the moment, the drainage channel is filled with water to form a water seal, thereby achieving the purpose of air blocking. When the water in the water tank is insufficient, for example, the liquid level in the water tank is reduced to be lower than the water storage part, namely, the water storage part of the drainage channel is insufficient, the air blocking part blocks the water outlet part of the drainage channel under the action of gravity, and the air blocking purpose can also be ensured.

On the whole, the drainage and air-blocking structure of the natural gas cabin of the comprehensive pipe rack has the following beneficial effects:

(1) can directly cancel through setting up drainage choke structure and set up the natural gas cabin sump pit, make utility tunnel structure simplization, design is simple, construction convenience, the small investment. Simultaneously, an explosion-proof submersible sewage pump is cancelled, the installation equipment of the pipe gallery is less, the investment is less, the energy consumption is less, and the operation and maintenance amount is less.

(2) The drainage and air-blocking structure can be spatially communicated with the drainage side ditch of the adjacent fire-proof subareas, so that the purpose of unimpeded circulation of accumulated water is achieved;

(3) the drainage of the natural gas cabin of the comprehensive pipe rack can be effectively carried out by arranging the drainage and air blocking structure, and the drainage function of the natural gas cabin of the comprehensive pipe rack is effective;

(4) except finishing the drainage function of the natural gas cabin, the accumulated water in the drainage channel of the pipe gallery can be equal to a fireproof door, so that adjacent fireproof partitions are effectively isolated, and the standard specification is met;

(5) except finishing the drainage function of the natural gas cabin, the adjacent fireproof subareas can be isolated in space by utilizing accumulated water in the drainage channel of the pipe gallery, so that the potential safety hazard is avoided due to the fact that natural gas diffuses and leaks when an accident is avoided.

(6) Except finishing the drainage function of the natural gas cabin, the adjacent fireproof subareas can be isolated in space by utilizing the tangent relation between the inner surface of the cone of the water tank and the spherical line of the air blocking piece, so that the natural gas diffusion and leakage are avoided during accidents, and the potential safety hazard is avoided.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not so limited in scope. The embodiments of the utility model include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.

Fig. 1 is a plan layout view of a water and gas barrier structure of a natural gas cabin of a utility tunnel in the prior art.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

Fig. 3 is a floor plan of another prior art water and gas barrier configuration for a utility tunnel natural gas hold.

Fig. 4 is a cross-sectional view taken along line B-B of fig. 3. Wherein the arrows in figures 1 and 3 represent the direction of the longitudinal slope of the utility tunnel floor and the arrows in figures 2 and 4 represent the direction of the transverse slope of the utility tunnel floor.

Fig. 5 is a plan layout view of the water drainage and air barrier structure of the natural gas cabin of the utility tunnel provided by the utility model.

Fig. 6 is a cross-sectional view taken along line C-C of fig. 5.

Fig. 7 is a cross-sectional view taken along line D-D of fig. 5.

Fig. 8 is a partial enlarged view at E in fig. 6.

Reference numerals of the above figures:

the prior art is as follows:

01. fire prevention zoning; 02. a firewall; 021. a fire door; 03. a sump; 031. an explosion-proof submersible sewage pump; 04. a drainage side ditch; 05. and a water discharge pipe.

The application:

1. a comprehensive pipe gallery; 11. a natural gas cabin; 12. a firewall; 121. a fire door; 131. a first fire zone; 132. a second fire zone; 14. a drainage side ditch; 15. a base plate; 151. a bump;

101. a water tank; 102. a gas blocking member;

2. a drainage channel; 20. plugging the opening; 21. a water inlet part; 22. a water outlet part; 23. a water storage part.

Detailed Description

The technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a drainage choke structure in utility tunnel natural gas cabin can solve utility tunnel natural gas cabin drainage problem, can reduce the sump pit again in the drainage choke structure in this application embodiment, stops the hidden danger that adjacent fire prevention subregion natural gas leaked simultaneously, reaches green design, economy and is suitable for, safe efficient purpose.

Referring to fig. 5 to 8, in an embodiment of the present invention, a water and gas blocking structure for a natural gas cabin of a utility tunnel is provided, which is applied to a utility tunnel 1 having a natural gas cabin 11. The drainage of utility tunnel natural gas cabin hinders choke structure includes: a drainage passage 2 located below the firewall 12; the firewall 12 has a first side facing the first fire compartment 131 and a second side facing the second fire compartment 132.

The drain channel 2 is provided in the floor 15 of the utility tunnel 1, as shown in fig. 8, the drain channel 2 includes: a water inlet part 21 positioned at the first side of the firewall 12, a water outlet part 22 positioned at the second side of the firewall 12, and a water storage part 23 connecting the water inlet part 21 and the water outlet part 22; the drainage channel 2 is communicated with drainage side channels 14 at two sides of the firewall 12, and the highest liquid level of the water inlet part 21 is higher than that of the water outlet part 22; the water outlet portion 22 is provided with a gas barrier structure.

As shown in fig. 6 and 7, the gas barrier structure includes: a water tank 101, the cross section of which is gradually reduced from top to bottom along the height direction; a plugging port 20 is arranged at the lower end of the water tank 101; and an air blocking member 102 disposed in the water tank 101. When the water in the drainage channel 2 is lower than the plugging port 20, the air blocking piece 102 can be positioned at the plugging port 20 to plug the drainage channel 2; when water in the drain passage 2 exceeds the plugging port 20, the air blocking member 102 can float in the water tank 101 away from the plugging port 20.

In this specification, a drain choke structure is provided for a utility tunnel 1 natural gas hold 11, the drain choke structure of the utility tunnel 1 natural gas hold 11 comprising: a drain passage 2 located below the fire wall 12 and a gas barrier structure located in the water outlet portion 22 of the drain passage 2. The choke structure includes a water tank 101 and a choke member 102 disposed in the water tank 101. Specifically, the average density of the air blocking member 102 is smaller than the density of water, so that when the natural gas cabin 11 of the utility tunnel 1 is in a drainage state, the air blocking member 102 can float in the water tank 101, and at this time, the drainage channel 2 is filled with water to form a water seal, thereby achieving the purpose of air blocking. When the water in the water tank 101 is insufficient, for example, the liquid level in the water tank 101 drops below the water storage part 23, i.e. the water in the water discharge channel 2 is insufficient, the air blocking member 102 blocks the water discharge part 22 of the water discharge channel 2 under the action of gravity, and the air blocking can be ensured.

In addition, the average density of the gas barrier member 102 may be equal to the density of water, and the gas barrier member 102 may be suspended in the water tank 101 when water is stored in the water tank 101.

When the gutter 14 of the first fire compartment 131 flows into the gutter 14 of the second fire compartment, the water flowing through the drainage channel 2 has a certain flow rate under the action of gravity, and even if the floating position of the choke member 102 is located at the plugging port 20 or close to the plugging port 20, the plugging port 20 is not completely plugged by the water flow. That is, when the average density of the choke member 102 is equal to the density of water, the drainage channel 2 can also perform a drainage function in cooperation with the drainage gutter 14.

The water tank 101 is a conical water tank 101, a sealing opening 20 is arranged at a position, close to the lower end, of the water tank, the cross section of the water tank is smaller, the air blocking piece 102 can be a round ball, and the section of the sealing opening 20 is a circular hole.

When the gas barrier member 102 is a round ball, the shape of the round ball is isotropic, and when the gas barrier member is in water, the final plugging of the plugging port 20 is not hindered by any irregular rotation of the round ball, thereby plugging the drainage passage 2. The gas barrier member 102 may be made of a single material, such as nylon, hollow steel ball, or a composite material, and the specific application is not limited thereto.

When the choke member 102 is a ball, the ball will not block when falling with water level under the action of gravity. The water tank 101 can be an inverted right circular cone, the upper opening is wide, and the function of collecting water in a large range is met; the lower opening is narrow and can be plugged by the ball in a seamless way, so that the drainage channel 2 is plugged, and two fireproof subareas are physically separated.

Specifically, the inner cavity of the water tank 101 is a conical hole, the lower part of the water tank 101 is provided with a drainage channel 2 section, one end of the drainage channel 2 section is a cylindrical hole, and the center of the cylindrical hole coincides with the center of the conical hole, so that the spherical ball is guaranteed to seamlessly block the drainage channel 2.

In this specification, the drainage and gas barrier structure is mainly illustrated with the natural gas utility tunnel 1 as an application scenario. Wherein, under a specific application scene, taking single-cabin natural gas utility tunnel 1 as an example, the theory of operation of single-cabin natural gas utility tunnel 1 that is provided with drainage choke structure is as follows:

the water seeps from the natural gas cabin 11 and flows into the drainage side ditch 14;

the accumulated water of the drainage side ditch 14 of the natural gas cabin 11 is discharged along the longitudinal slope of the comprehensive pipe gallery 1;

the accumulated water in the drainage side ditch 14 of the natural gas cabin 11 flows in the direction of draining from the first fireproof subarea 131 to the second fireproof subarea 132;

the accumulated water in the drainage side ditch 14 of the natural gas cabin 11 meets the blockage of the firewall 12 and flows to the water inlet part 21 at the first fireproof subarea 131 side of the drainage and air-blocking structure of the pipe gallery;

the accumulated water of the drainage side ditch 14 of the natural gas cabin 11 flows into the drainage channel 2 of the pipe gallery;

the water outlet part 22 of the second fire-proof subarea 132 of the ponding water outlet pipe gallery drainage channel 2 of the drainage side ditch 14 of the natural gas cabin 11;

the accumulated water in the drainage gutter 14 of the natural gas tank 11 is drained along the drainage gutter 14 in the second fire compartment 132;

until the natural gas cabin 11 drains the terminal sump, the ponding of the natural gas cabin 11 drainage side ditch 14 is discharged out of the utility tunnel 1.

When the natural gas cabin 11 does not need to discharge accumulated water, the accumulated water is stored in the drainage channel 2 of the pipe gallery;

2 RAM volume pondings of piping lane drainage channel can the adjacent fire prevention subregion of physical separation, can prevent fires, further prevents the natural gas diffusion.

When the water in the drainage channel 2 is not enough, the air blocking member 102 is seated on the blocking opening 20 of the water tank 101, so that the air blocking effect is achieved.

The drainage and air-blocking structure of the natural gas cabin 11 of the utility tunnel 1 has the following beneficial effects:

(1) can directly cancel through setting up drainage choke structure and set up 11 sump pits in natural gas cabin, make utility tunnel 1 simple structure, the design is simple, construction convenience, the small investment. Simultaneously, an explosion-proof submersible sewage pump is cancelled, the installation equipment of the pipe gallery is less, the investment is less, the energy consumption is less, and the operation and maintenance amount is less.

(2) The drainage and air-blocking structure can be spatially communicated with the drainage side ditch 14 of the adjacent fire-proof subareas, so that the purpose of unimpeded circulation of accumulated water is achieved;

(3) the drainage and air-blocking structure can effectively drain the natural gas cabin 11 of the comprehensive pipe rack 1, and has the function of effectively draining the natural gas cabin 11 of the comprehensive pipe rack 1;

(4) except finishing the drainage function of the natural gas cabin 11, the accumulated water in the drainage channel 2 of the pipe gallery can be used for equaling the fireproof door 121, and the adjacent fireproof subareas are effectively isolated;

(5) except finishing the 11 drainage functions in natural gas cabin, utilize the ponding in the piping lane drainage channel 2, can the adjacent fire prevention subregion of space isolation, when avoiding the accident, the potential safety hazard is stopped in the natural gas diffusion leakage.

(6) Except finishing the drainage function of the natural gas cabin 11, the adjacent fire-proof subareas can be isolated in space by utilizing the tangential relation between the inner surface of the cone of the water tank 101 and the spherical line of the air blocking piece 102, so that the natural gas diffusion and leakage are avoided during accidents, and the potential safety hazard is avoided.

In one embodiment, the dimension of the drain channel 2 in the width direction of the utility tunnel 1 is less than or equal to the width of the drain gutter 14.

The height of the channel corresponding to the water storage part 23 of the drainage channel 2 is generally 50-100 mm, which is convenient for cleaning and can reduce investment.

The width of the drainage channel 2 can be determined according to the needs, and the size can be generally made smaller as long as the water storing part 23 can store water, so as to reduce the investment. For example, the dimension of the drain passage 2 in the width direction of the utility tunnel 1 in this embodiment is equal to or less than the width of the gutter 14. Preferably, the size of the drainage channel 2 along the width direction of the utility tunnel 1 is 100-200 mm, which is convenient for cleaning and reduces investment.

In one embodiment, the bottom surface of the water holding portion 23 is a horizontal surface.

As shown in fig. 6, when the bottom surface of the water storage part 23 is preferably a horizontal surface, it is easy to process, and the water storage amount is larger than that when the bottom surface of the water storage part 23 is a slope or the like, and the water sealing effect is better.

Furthermore, the drainage channel 2 is integrally poured in the bottom plate 15, so that the construction is more convenient.

This drainage channel 2 is a body structure with utility tunnel 1, and direct pouring integrated into one piece obtains when directly carrying out the concrete construction to utility tunnel 1.

Specifically, it may be constructed as shown in fig. 6 and 7, where the bottom of the bottom plate 15 has a protrusion 151 protruding downward at a position corresponding to the firewall 12, and the drainage passage 2 is opened in the protrusion 151.

Based on the drainage and gas barrier structure of the natural gas cabin 11 of the utility tunnel 1 provided in the above embodiment, the present specification further provides a utility tunnel 1, a plurality of fire-proof walls 12 are arranged in the utility tunnel 1 at intervals and are used for dividing the natural gas cabin 11 into a plurality of fire-proof subareas, one side of the bottom of each fire-proof subarea is provided with a drainage gutter 14, and the utility tunnel 1 comprises the drainage and gas barrier structure of the natural gas cabin 11 of the utility tunnel 1 in the above embodiment. Specifically, the specific shape and structure of the water drainage and air blocking structure and the technical effects that can be achieved may refer to the specific description of the water drainage and air blocking structure, and are not described herein again.

In general, the utility tunnel 1 provided in the present specification has a natural gas cabin 11 drainage channel 2 that is fire proof, with the function of a firewall 12; when the water accumulation exists in the drainage channel 2 of the natural gas cabin 11 of the comprehensive pipe gallery 1, the accumulated water is used as a water seal to physically separate adjacent fire partitions, so that natural gas diffusion and leakage are avoided during accidents; when no accumulated water exists in the drainage channel 2 of the comprehensive pipe gallery 1 (the water storage part 23 in the drainage channel 2 cannot form a water seal), the adjacent fireproof subareas are physically separated by using the air blocking structure, so that natural gas diffusion and leakage are avoided during accidents.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.

The above embodiments are only a few embodiments of the present invention, and the embodiments of the present invention are described above, but the present invention is only used for the understanding of the present invention, and is not limited to the embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (11)

1. The utility tunnel natural gas tank's drainage choke structure, its characterized in that, utility tunnel natural gas tank's drainage choke structure includes: a drainage channel located below the firewall; the firewall has a first side facing the first fire zone and a second side facing the second fire zone;

drainage channel sets up in utility tunnel's the bottom plate, drainage channel includes: the water storage device comprises a water inlet part positioned on a first side of the firewall, a water outlet part positioned on a second side of the firewall, and a water storage part connected with the water inlet part and the water outlet part; the drainage channel is communicated with drainage side channels on two sides of the firewall, and the highest liquid level of the water inlet part is higher than that of the water outlet part; the water outlet part is provided with a gas blocking structure, and the gas blocking structure comprises:

the cross section of the water tank is gradually reduced from top to bottom along the height direction; the lower end of the water tank is provided with a plugging port;

the air blocking piece is arranged in the water tank, and when the water in the drainage channel is lower than the plugging port, the air blocking piece can be positioned at the plugging port to plug the drainage channel; when water in the drainage channel exceeds the plugging port, the air blocking piece can be far away from the plugging port and float in the water tank.

2. The water and gas barrier structure of the utility tunnel natural gas hold of claim 1, wherein the average density of the gas barrier is less than the density of water.

3. The water and gas barrier structure of the utility tunnel natural gas hold of claim 2, wherein the gas barrier member is a sphere and the cross section of the plugging port is a circular hole.

4. The water drainage and air barrier structure of the utility tunnel natural gas cabin according to claim 3, wherein the inner cavity of the water tank is a conical hole, the lower part of the water tank is provided with a water drainage channel section with one end being a cylindrical hole, and the center of the cylindrical hole coincides with the center of the conical hole.

5. The utility tunnel natural gas hold drain choke structure of claim 3, characterized in that the dimension of the drain channel in the width direction of the utility tunnel is less than or equal to the width of the drain gutter.

6. The water and gas barrier structure of the utility tunnel natural gas hold of claim 1, wherein the bottom surface of the water holding portion is a horizontal surface.

7. The utility tunnel natural gas hold drain choke structure of claim 1, wherein the drain passage has a dimension in the width direction of the utility tunnel that is less than or equal to the width of the drain gutter.

8. The water drainage and gas barrier structure of the utility tunnel natural gas cabin of claim 1, wherein the dimension of the water drainage channel in the width direction of the utility tunnel is 100-200 mm.

9. The drain and choke structure for the natural gas hold of the utility tunnel according to claim 1, wherein the bottom of the floor has a downwardly protruding protrusion corresponding to the position of the fire wall, and the drain passage is opened in the protrusion.

10. The water and gas barrier structure of the utility tunnel natural gas cabin of claim 1, wherein the water drainage channel is disposed in the floor by integral casting.

11. A utility tunnel having a plurality of fire walls spaced apart within the utility tunnel for dividing a natural gas hold into a plurality of fire zones, each fire zone having a gutter on one side of the bottom, wherein the utility tunnel includes the drain and gas barrier structure of the utility tunnel natural gas hold of any one of claims 1-10.

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