CN211874472U

CN211874472U - High-diving-level area fault gas observation well structure

Info

Publication number: CN211874472U
Application number: CN202020477096.1U
Authority: CN
Inventors: 戴波; 李飞; 陈俊松
Original assignee: JIANGSU EARTHQUAKE ADMINISTRATION
Current assignee: JIANGSU EARTHQUAKE ADMINISTRATION
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-11-06
Anticipated expiration: 2030-04-03

Abstract

The utility model discloses a high diving position area fault gas observation well structure, including the muffler, get trachea, condenser pipe, silk screen filter, observation well sleeve pipe, well head apron, air inlet check valve, the check valve of giving vent to anger and conical cursory. The fault gas observation well structure in the high-diving-level area can condense the clear flow sucked by the gas taking pipe by utilizing the condensation pipe and the wire mesh filter, so that the water vapor is reduced from entering a fault gas measuring instrument; by utilizing the design of the conical buoy, the vertical line and the balancing weight, the conical bottom surface of the conical buoy can be ensured to be upward when the conical buoy floats, and accumulated water is prevented from entering the air inlet hose; the air inlet one-way valve and the air outlet one-way valve can be used for one-way air inlet or air outlet when the air pressure inside and outside the observation well casing is unequal, and the closed state is maintained after the air pressure is basically balanced; the gas overflowing from the observation well can be conveniently dispersed into the casing of the observation well by utilizing the air holes.

Description

High-diving-level area fault gas observation well structure

Technical Field

The utility model relates to a fault gas observation well structure, especially a high diving position area fault gas observation well structure.

Background

The occurrence of earthquake is the process of underground substance migration, energy release and stress change, thereby causing the gas geochemical field of fracture zone and the surrounding area to be changed significantly during the inoculation and occurrence of earthquake. At present, earthquake geochemical observation is mainly distributed in a south-north band, a Zhang Bohai band, a southeast edge kelp band, a Tianshan band and the like. One part of observation points are built by relying on hot springs and flowing wells, and degassing and gas taking devices are designed or manual sampling detection is adopted; the other part of observation points are arranged on a fault, and an observation hole and a gas taking device are designed, wherein the observation hole is usually selected from areas with higher topography and deeper underground water burial depth, and no water exists in the observation hole.

At present, the structure of a fault gas observation well is designed to be used in a plurality of middle and western regions, the underground water burial depth of the region is deeper, the fault gas observation well is generally 5-10m, the underground water is not usually arranged in the well, the structure of the fault gas observation well mainly comprises a gas collection section built by gravel piles, a gas guide section formed by a sleeve and a gas pipe, and the structure of the fault gas observation well is not suitable for the high-diving-level region. The fault gas observation hole is constructed in a high-diving-level area, the water level is always within 5m, the volume of a gas collection cavity formed from the water surface to a wellhead is directly influenced by the change of the water level, the change of the volume of the gas collection cavity causes the change of the concentration of fault gas, so that the measured data cannot reflect the real change of the fault gas, and therefore, a fault gas observation well structure specially aiming at the high-diving-level area is necessarily designed, the problems that the water level changes, the gas inlet and outlet amount of a fault gas measuring instrument is deviated and the like are solved, and the designed structural component can be suitable for long-term continuous observation.

Disclosure of Invention

Utility model purpose: the utility model provides a special fault gas observation well structure to high diving position area, can solve water level change, fault gas measurement appearance ware business turn over tolerance and have the problem of deviation, and the structural component of design can be fit for long-term continuous observation and use.

The technical scheme is as follows: the utility model discloses a high-diving-level area fault gas observation well structure, which comprises a gas return pipe, a gas taking pipe, a condenser pipe, a screen filter, an observation well casing, a well head cover plate, a gas inlet one-way valve, a gas outlet one-way valve and a conical buoy;

the lower end of the observation well casing is vertically inserted into the stratum, and extends to the lower part of the gas-covered zone of the stratum; each air hole is distributed on the pipe wall at the lower end of the observation well casing pipe; the upper end of the observation well casing extends out of the ground, and the well mouth cover plate is sealed on the upper end pipe orifice of the observation well casing; the air return pipe and the air taking pipe penetrate through the well mouth cover plate and extend into the observation well casing; the lower end of the air taking pipe is connected with an air inlet hose; a pipe hole is formed in the center of the conical bottom surface of the conical float, and the lower end part of the air inlet hose is installed on the pipe hole in a butt joint mode; air inlets communicated with the pipe holes are formed in the conical surface and the conical bottom surface of the conical float; a balancing weight is hung at the top of the cone of the conical buoy through a vertical line; the air inlet one-way valve and the air outlet one-way valve are both installed on the well head cover plate in a penetrating manner; the condenser pipe and the wire mesh filter are both connected in series on the gas taking pipe.

Furthermore, the well head cover plate is provided with sealing rings at the penetration positions of the air return pipe and the air taking pipe.

Furthermore, a heat-insulating layer is coated on the pipe wall of the observation well casing extending out of the ground.

Furthermore, a protective enclosure is arranged on the outer side of the heat insulation layer and close to the stratum.

Furthermore, the air return pipe and the air taking pipe are L-shaped air pipes, and the condensing pipe and the wire mesh filter are connected to the vertical pipe section of the air taking pipe in series.

Furthermore, the outer side pipe orifices of the air return pipe and the air taking pipe are respectively connected with a connecting hose which is used for being communicated with the fault air measuring instrument.

Compared with the prior art, the utility model, its beneficial effect is: clear flow sucked by the gas taking pipe can be condensed by utilizing the condensation pipe and the wire mesh filter, so that water vapor is reduced from entering the fault gas measuring instrument; by utilizing the design of the conical buoy, the vertical line and the balancing weight, the conical bottom surface of the conical buoy can be ensured to be upward when the conical buoy floats, and accumulated water is prevented from entering the air inlet hose; the air inlet one-way valve and the air outlet one-way valve can be used for one-way air inlet or air outlet when the air pressure inside and outside the observation well casing is unequal, and the closed state is maintained after the air pressure is basically balanced; the gas overflowing from the observation well can be conveniently dispersed into the casing of the observation well by utilizing the air holes.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is the utility model discloses a manhole cover board top mounting structure schematic diagram.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example 1:

as shown in fig. 1 and 2, the utility model discloses a high diving space area fault gas observation well structure includes: the device comprises an air return pipe 1, an air taking pipe 2, a condenser pipe 3, a wire mesh filter 4, an observation well casing 6, a well cover plate 7, an air inlet one-way valve 8, an air outlet one-way valve 9 and a conical float 11;

the lower end of the observation well casing 6 is vertically inserted into the stratum 14, and the lower end of the observation well casing 6 extends to the lower part of the gas-containing zone of the stratum 14; the pipe wall at the lower end of the observation well casing 6 is distributed with a plurality of air holes 15; the upper end of the observation well casing 6 extends out of the stratum 14, and the well mouth cover plate 7 is covered on the upper end pipe orifice of the observation well casing 6; the air return pipe 1 and the air taking pipe 2 both penetrate through the wellhead cover plate 7 and extend into the observation well casing 6; the lower end of the air intake pipe 2 is connected with an air intake hose 16; a pipe hole is formed in the center of the conical bottom surface of the conical float 11, and the lower end part of the air inlet hose 16 is installed on the pipe hole in a butt joint mode; air inlet holes 12 communicated with the pipe holes are formed in the conical surface and the conical bottom surface of the conical float 11; a counterweight 18 is hung at the top of the conical float 11 through a vertical line 17; the air inlet one-way valve 8 and the air outlet one-way valve 9 are both installed on the wellhead cover plate 7 in a penetrating manner; the condenser pipe 3 and the wire mesh filter 4 are both connected in series on the gas taking pipe 2.

The space from the underground water surface 13 in the observation well casing 6 to the well cover plate 7 is used as a gas collection cavity, so that the method is simple and practical, and the observation error caused by a complex gas collection device is reduced; clear flow sucked by the gas taking pipe 2 can be condensed by utilizing the condensation pipe 3 and the wire mesh filter 4, so that water vapor is reduced from entering a fault gas measuring instrument; by utilizing the design of the conical float 11, the vertical line 17 and the balancing weight 18, when the conical float 11 floats, the conical bottom surface of the conical float 11 is ensured to be upward, and accumulated water is prevented from entering the air inlet hose 16; the air inlet one-way valve 8 and the air outlet one-way valve 9 can be used for one-way air inlet or air outlet when the air pressure inside and outside the observation well casing 6 is unequal, and the closed state is maintained after the air pressure is basically balanced; the air holes 15 can be used for facilitating the gas overflowing from the observation well to be scattered into the observation well casing 6.

Further, sealing rings 10 are arranged on the well cover plate 7 and at the penetrating positions of the air return pipe 1 and the air taking pipe 2. The sealing ring 10 can be used for sealing the penetrating position, so that the radon concentration change in the observation well casing 6 caused by the direct flow of the internal and external air flow is prevented.

Furthermore, the pipe wall of the observation well casing 6 extending out of the stratum 14 is coated with an insulating layer 5. Utilize heat preservation 5 can play the heat preservation effect, reduce the influence of temperature variation to the inside atmospheric pressure of observation well sleeve 6.

Further, a protective barrier 19 is provided outside the thermal insulation layer 5 and adjacent to the formation 14. Protection can be provided at the location of the formation 14 by means of a protective fence 19.

Further, the air return pipe 1 and the air taking pipe 2 are L-shaped air pipes, and the condensation pipe 3 and the wire mesh filter 4 are connected to the vertical pipe section of the air taking pipe 2 in series. The condensation pipe 3 and the wire mesh filter 4 are connected in series on the vertical pipe section of the gas taking pipe 2, so that condensed water can conveniently flow back to the inside of the observation well casing 6, and the condensed water is prevented from flowing to the fault gas measuring instrument.

Furthermore, the outer pipe orifices of the air return pipe 1 and the air intake pipe 2 are both connected with a connecting hose 20 which is used for being communicated with a fault air measuring instrument. The connection of the gas intake tube 2 and the gas return tube 1 to the gas inlet and outlet of the tomograph is facilitated by the connection hose 20.

The utility model discloses a high diving position area fault gas observation well structure when using, selects suitable degree of depth according to the hydrogeological structure condition of position, simultaneously in order to reduce rainfall and atmospheric pressure's influence, the observation well degree of depth is selected to be suitable under the aeration zone of stratum 14; the bottom of the observation well casing 6 is not closed, and the pipe wall of the lower end is distributed with the vent holes 15, so that the exchange with underground water is facilitated, the length of the perforated pipe can be properly prolonged, the exchange quantity of well water of the observation well and the outside is increased, and the gas overflowing from the observation well is increased; fault gas in well water overflows into a gas collecting cavity and enters a fault gas measuring instrument through a conical buoy 11, a gas inlet hose 16, a gas taking pipe 2 and a connecting hose 20, wherein the conical buoy 11 is made of light materials, so that the conical buoy 11 can float on an underground water surface 13 when the water level rises, and normal gas taking is not influenced; in order to reduce the situation that the volume of the gas collection cavity is changed due to the fact that the underground water surface 13 rises and falls and the gas inlet and outlet amounts of the fault gas measuring instrument are unequal, an air inlet one-way valve 8 and an air outlet one-way valve 9 are arranged, and the air pressure in the gas collection cavity can be rapidly balanced by the air inlet one-way valve 8 and the air outlet one-way valve 9; the moisture in the return air pipe 2 can be removed through the action of the condensation pipe 3 and the wire mesh filter 4.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a high diving position area fault gas observation well structure which characterized in that: comprises an air return pipe (1), an air taking pipe (2), a condensing pipe (3), a wire mesh filter (4), an observation well casing pipe (6), a well head cover plate (7), an air inlet one-way valve (8), an air outlet one-way valve (9) and a conical buoy (11);

the lower end of the observation well casing (6) is vertically inserted into the stratum (14), and the lower end of the observation well casing (6) extends to the lower part of the gas-containing zone of the stratum (14); the pipe wall of the lower end of the observation well casing pipe (6) is distributed with a plurality of air holes (15); the upper end of the observation well casing (6) extends out of the stratum (14), and a wellhead cover plate (7) is sealed on the wellhead at the upper end of the observation well casing (6); the air return pipe (1) and the gas taking pipe (2) penetrate through the wellhead cover plate (7) and extend into the observation well casing pipe (6); the lower end of the gas taking pipe (2) is connected with a gas inlet hose (16); a pipe hole is formed in the center of the conical bottom surface of the conical float (11), and the lower end part of the air inlet hose (16) is installed on the pipe hole in a butt joint mode; air inlets (12) communicated with the pipe holes are arranged on the conical surface and the conical bottom surface of the conical float (11); a counterweight (18) is hung at the top of the cone of the conical float (11) through a vertical line (17); the air inlet one-way valve (8) and the air outlet one-way valve (9) are both installed on the well head cover plate (7) in a penetrating manner; the condensing pipe (3) and the wire mesh filter (4) are both connected in series on the gas taking pipe (2).

2. The high phreatic zone tomography observation well structure of claim 1, wherein: and sealing rings (10) are arranged on the well head cover plate (7) and positioned at the penetration positions of the air return pipe (1) and the air taking pipe (2).

3. The high phreatic zone tomography observation well structure of claim 1, wherein: the pipe wall of the observation well casing pipe (6) extending out of the stratum (14) is coated with an insulating layer (5).

4. The high phreatic zone tomography observation well structure of claim 3, wherein: a protective fence (19) is arranged at the outer side of the heat insulation layer (5) and close to the stratum (14).

5. The high phreatic zone tomography observation well structure of claim 1, wherein: the air return pipe (1) and the air taking pipe (2) are L-shaped air pipes, and the condensing pipe (3) and the wire mesh filter (4) are connected in series on the vertical pipe section of the air taking pipe (2).

6. The high phreatic zone tomography observation well structure of claim 1, wherein: and the outer side pipe orifices of the air return pipe (1) and the air taking pipe (2) are respectively connected with a connecting hose (20) which is used for being communicated with a fault air measuring instrument.