CN209762233U - Seal assembly and geogas measurement and sampling device - Google Patents

Abstract

The utility model discloses a seal assembly and a ground gas measurement volume sample thief belongs to ground gas measuring equipment field. The sealing component of the utility model comprises a sealing plug, a sealing cover and a sealing ring which are sleeved on the sampler from bottom to top in turn; the sealing plug is tightly attached to the outer wall surface of the sampler, and a through hole is formed in the middle of the sealing cover; the outer wall surface of sampler is hugged closely to the sealing washer inner wall, the utility model discloses a seal assembly simple structure, reasonable in design, easily make. The utility model discloses a sampler is measured to ground gas is assembled by above-mentioned seal assembly and is formed, during the use, with the sampler of assembling, the inspection hole is inserted to the part, earlier with the clearance between sealing plug shutoff sampler and the inspection hole, again with the sealed lid compaction subaerial in the inspection hole place, insert the sampler to the inspection hole detection position down, clearance between the through hole of the sealed lid of sealing washer shutoff at last and the sampler, the step is simple and convenient, and effectively solve the easy problem of blockking up of current sampler inlet port.

Description

seal assembly and geogas measurement and sampling device

Technical Field

The utility model belongs to ground gas measuring equipment field, specifically speaking relates to a seal assembly and a ground gas measurement volume sample thief.

background

The common simple substance form of the chemical element radon is radon which is colorless, odorless and tasteless inert gas and has radioactivity, the chemical reaction of the radon is inactive, and the radon is difficult to react with other elements to form a compound. Because rocks and soil on the earth's surface contain trace amounts of uranium, radon is contained in soil, surface water and the atmosphere. Generally, natural radioactive substances are difficult to enter a human body, but radon gas which runs into the air from rock soil and soil easily enters the lung along with the respiration of the human body and goes to the whole body along with the flow of blood to destroy cell and molecular structures, so that the human body is damaged; and because radon is radioactive gas, after a person inhales into the body, alpha particles of the radon which decay can cause radiation damage in the respiratory system of the person, and finally lung cancer is caused. Therefore, the radon gas in the environment is important to detect and monitor, wherein, the research at home and abroad shows that the influence of underground geological structures on radon pollution in low-rise rooms of civil buildings is the most serious.

At present, a method for detecting the radon concentration in soil is to punch a detection hole into the soil for a test point by using a special drill steel, then pull out the drill steel, place a special sampler into the detection hole, use a sampling pump to pump the radon in the soil into a measuring chamber, and directly measure alpha radioactivity of an daughter product generated by the collected radon or the daughter product after electrostatic adsorption and concentration to calculate the radon concentration in the soil. Taking FD216 radon detector equipment as an example, the detection working principle is as follows: the air pump sucks radon-containing gas into the scintillation chamber, alpha particles emitted by radon and daughters of radon cause ZnS (Ag) coating in the scintillation chamber to emit light, and the photomultiplier converts the light signal into electric pulse. The control and measurement circuit formed by single-chip computer shapes the electric pulse output by detector to make timing counting. The pulse number in unit time is in direct proportion to the radon concentration, so that the radon concentration in the detection environment is determined.

In order to ensure the accuracy of the detection result, on one hand, when the special sampler is inserted into the detection hole in time after the special drill steel is pulled out, because the detection hole has a certain depth and diameter, the untimely operation can cause a part of radon gas in the detection hole to escape into the air, so that the radon gas collected by pumping is reduced, and the accuracy of the detection result is finally influenced; on the other hand, when detecting soil radon concentration, insert the back with special sampler in the inspection hole, need seal with soil in the top of inspection hole, prevent that the air from getting into and causing the detection error in the inspection hole, but discovery has following several problems in the actual working process: 1) the sealing with soil usually causes the blockage of the bottom air inlet of the sampler, and the detection test cannot be normally carried out; 2) for hard soil, the sealing effect can not be achieved generally when soil sealing is adopted; 3) the damage of external factors such as strong wind and the like to the sealing structure of the detection point in the detection process can not be overcome.

The same problem can also be met in the detection process of other ground gases except radon, in order to solve the sealing problem in the above-mentioned ground gas sampling process, improve detection accuracy and detection efficiency, chinese patent publication no: CN105021429A, published: 2015-07-28 discloses a drilling and air extracting integrated type ground gas sampler, which comprises a rod body, a hammering pile, an air suction pipe, a steering device, an air tap and a sealing device, wherein the sealing device is arranged between the upper part of the air suction pipe and the rod body, the sealing device comprises a sealing gasket and a sealing ring, the sealing gasket is sleeved on the air suction pipe and fixed inside the rod body, and the sealing ring is arranged between the sealing gasket and the air suction pipe and sleeved on the air suction pipe. When the device is used for measuring the ground gas, the device can be directly connected with the gas catcher and the air pump to directly sample without pulling out the rod body after the drill rod forms the sampling hole in the soil, so that the occurrence of hole collapse and the mixing of atmospheric substances are avoided, the smooth development of the ground gas measurement work is ensured, and the working quality is improved; the sealing gasket and the sealing ring effectively isolate the atmosphere and the ground gas coming from the air suction pipe, so that the atmosphere is prevented from being mixed into the ground gas. The integrated sampler simplifies the sampling process, shortens the sampling time and improves the working efficiency. However, in order to achieve a certain sealing effect, the sampler of the present invention has a complicated structural design, so that the whole detection device is not portable and inconvenient to operate.

Disclosure of Invention

1. Problems to be solved

To the complicated and awkward problem of sealing device structure among the current ground gas measuring equipment, the utility model provides a seal assembly and a ground gas measurement volume sample thief. The sealing component of the utility model has simple structure and convenient use; the utility model discloses a sampler is measured to ground gas forms through the seal assembly equipment, and the equipment is convenient, and during the use, operating procedure is simpler.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

a sealing assembly is applied to a sampler and comprises a sealing plug, a sealing cover and a sealing ring which are sequentially sleeved on the sampler from bottom to top;

The sealing plug is used for sealing a gap between the sampler and the detection hole;

A through hole for the sampler to pass through is formed in the middle of the sealing cover;

The inner wall of the sealing ring is tightly attached to the outer wall surface of the sampler, and the sealing ring is used for sealing a gap between the through hole and the sampler.

A kind of geogas measurement sample taking device, including sampler and above-mentioned seal assembly.

to further ensure the sealing effect of the gap between the through-hole and the sampler, the shape of the sealing ring is preferably adapted to the through-hole.

in order to enable the sealing ring to be tightly attached to the outer wall surface of the sampler and improve the sealing performance of the attachment surface, preferably, the sealing ring is made of rubber, and the inner diameter of the sealing ring is 0.75-0.875 time of the outer diameter of the sampler.

To facilitate sealing plug compaction and periodic replacement, the sealing plug is preferably a sponge plug.

in order to improve the stability of the sealing cover in use, the material of the sealing cover is preferably one of rigid plastic, metal, wood or rubber.

In order to ensure the close fit between the sealing cover and the ground of the detection point, the sealing cover preferably comprises a cover body, and a sealing layer is arranged on one surface of the cover body, which is in contact with the ground.

In order to further improve the sealing effect between the sealing cover and the detection point ground and the stability of the sealing cover in the using process, preferably, the periphery of the bottom edge of the cover body is provided with an outer edge, the bottom surface of the outer edge is provided with an annular groove, and a rubber ring is arranged in the annular groove.

Preferably, a sealing cone is arranged at the upper end of the sealing plug, and a sealing slope matched with the sealing cone in shape is formed at the lower port of the through hole.

A method of using a geogas measurement sampler, comprising:

1) assembling the geogas measuring sampler, so that the sealing plug, the sealing cover and the sealing ring are sequentially sleeved on the sampler from bottom to top;

2) Partially inserting the assembled sampler in the step 1) into a detection hole, plugging a gap between the sampler and the detection hole by using a sealing plug, then compacting a sealing cover on the ground where the detection hole is located, inserting the sampler downwards to a detection position of the detection hole, and finally plugging a gap between the through hole and the sampler by using a sealing ring.

3. advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the sealing assembly of the utility model comprises a sealing plug, a sealing cover and a sealing ring which are sequentially sleeved on the sampler from bottom to top, the sealing assembly is designed in a split way, the operation is more convenient, the structure of the three sealing structures is simple, and the problem that the sealing point in the operation is greatly influenced by the environment of the detection point of the existing ground gas sampling equipment is effectively solved; wherein:

Firstly, the inner wall of a sealing plug is tightly attached to the outer wall surface of a sampler and used for plugging a gap between the sampler and a detection hole, so that the problem of plugging of an air inlet hole of the sampler caused by a soil sealing technology is solved, meanwhile, soil of a detection point is used for plugging an outlet above the detection hole during soil sealing operation, if the soil quality of the detection point is hard, a large number of cracks can appear, and the sealing effect is poor, but the sealing plug of the utility model is plugged at the gap between the sampler and the detection hole, so that the sealing effect cannot be influenced by the restriction of the soil quality on site;

after the sealing plug is sealed, the sealing cover slides downwards to the upper part of the detection hole to be attached to the ground where the detection hole is located through a through hole formed in the middle of the sealing cover, and the sealing cover is used for preventing the sealing plug sealing point and the sampler from being damaged by wind and sand on site;

Thirdly, the sealing ring closes the gap between the through hole and the sampler by clinging to the outer wall surface of the sampler, so as to finish three-layer sealing above the detection hole; the sealing component of the utility model has the advantages that the three sealing structures are organically matched, so that the use is more convenient;

(2) The utility model discloses a geogas measurement appearance ware forms through the seal assembly equipment, during the use, assembles seal assembly on the sampler earlier, is different from current sealing operation, the utility model discloses an operating method is:

Firstly, inserting the lower end part of an assembled sampler into a detection hole, namely, firstly, aligning the sampler and the detection hole;

Secondly, a gap between the outer wall of the sampler and the inner wall of the detection hole is plugged by using a sealing plug, so that the problem that the air inlet is easily blocked due to falling of soil particles caused by sliding the sampler to a corresponding detection position of the detection hole and then sealing in the prior art is effectively solved;

Thirdly, the sealing cover slides downwards to the detection hole on the ground by utilizing the through hole, and at the moment, the sampler can be stably inserted downwards to a corresponding detection position in the detection hole under the limit of the through hole and the sealing plug, so that the problem of air inlet blockage caused by unstable downward insertion of the sampler in the existing sealing operation and easy wall collision is solved;

Fourthly, finally, a sealing ring is used for plugging a gap between the through hole and the sampler, so that gas in the detection hole and gas in the atmosphere are prevented from being diffused mutually, and the sealing effect is further improved; the utility model has simple and convenient use steps and reasonable design, and effectively solves the problem that the air inlet is easy to be blocked in the existing sealing operation;

(3) the utility model discloses a sampler is got to geogas survey, wherein the sealing plug upper end still is provided with sealed awl, the lower port of through hole is opened there is shape and sealed awl complex sealed slope, sealed awl and sealed slope combine closely when sealed lid is on the ground for sealed lid not only can protect the check point environment, can also reach further sealed effect through the combination of sealing plug and sealed lid, also make sealing plug and sealed lid provide more stable limiting displacement for the sampler of inserting down.

Drawings

FIG. 1 is a schematic view showing the construction of a sampler after assembling a sealing assembly according to example 1;

FIG. 2 is a cross-sectional view of the sealing cap of example 1;

FIG. 3 is a schematic view showing the construction of the sampler after the assembly of the sealing assembly according to example 2;

FIG. 4 is a cross-sectional view of the sealing cap of example 2;

FIG. 5 is a schematic view showing the operation of the sampler after the sealing assembly is assembled in accordance with example 2;

FIG. 6 is a first alternative form of the sealing cap of example 2;

FIG. 7 is a second alternative form of the closure described in example 2;

FIG. 8 is a third alternative form of the closure described in example 2;

FIG. 9 is a sectional view of the sealing cap of example 5;

FIG. 10 is a cross-sectional view of the sealing cap of example 4;

FIG. 11 is a schematic view showing the construction of the sampler after the assembly of the sealing member according to example 4;

fig. 12 is a schematic view showing the operation of the sampler after the sealing assembly is assembled according to example 4.

In the figure: 1. a sealing plug; 2. a sealing cover; 201. a cover body; 202. an outer edge; 3. a seal ring; 4. a sampler; 5. an air tap; 6. a connector; 7. an air inlet; 8. a through hole; 9. and (6) detecting holes.

Detailed Description

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

example 1

The general sampler 4 and the detector that include special drill rod and connect through the silicone tube of geogas measuring equipment, wherein sampler 4 and drill rod size are supporting, during the detection, look for relatively flat ground earlier, in the inspection point department, beat inspection hole 9 in toward soil with special drill rod, then extract the drill rod and put into inspection hole 9 with special sampler 4, the detection of bleeding.

The embodiment provides a kind of geogas measurement and sampling device, including a kind of seal assembly, the seal assembly is applied on the sampler 4, this is because, in the sampling process of the sampler 4, there is a certain clearance between the outer wall of the sampler 4 and the inner wall of the detection hole 9 punched by the drill steel, the gas to be detected in the detection hole 9 is diffused into the atmosphere along with the clearance, meanwhile, the external atmosphere is also pumped into the sampler 4 along with the clearance, resulting in a larger error of the detection result, the existing seal operation is that the operator adopts the soil at the detection point to seal the exit above the detection hole 9, what is more, the exit above the detection hole 9 is sealed by the combination of the soil and the leaves, this kind of seal operation, the soil for sealing drops to the bottom of the detection hole 9 along with the clearance, and the lower end of the sampler 4 is the air inlet 7 for air extraction, so the dropped soil particles can cause the blockage of the air inlet 7, the detection result and the detection efficiency are influenced; meanwhile, the existing soil sealing operation is greatly influenced by the field detection environment, if the soil quality of the detection point is hard, when the soil sealing is adopted, a large crack can appear on the sealing point, the sealing effect is poor, and if the severe strong wind detection environment is met, the sealing point can be damaged, even the sampler 4 is damaged, and the working efficiency is influenced.

As shown in fig. 1, the sealing assembly of this embodiment includes a sealing plug 1, a sealing cover 2 and a sealing ring 3, which are sequentially sleeved on a sampler 4 from bottom to top, wherein the sampler 4 is a sampler for FD216 radon detector equipment, and the outer diameter of the sampler 4 is selected to be 20 mm.

1) The middle of the sealing plug 1 of the embodiment is provided with a through hole matched with the cross-sectional dimension of the sampler 4, so that the inner wall of the sealing plug 1 is tightly attached to the outer wall surface of the sampler 4, namely the diameter of the through hole on the sealing plug 1 is 20mm, at the moment, sponge or rubber can be selected as the material of the sealing plug 1, but the sealing plug is not limited to the two materials, other sealing plugs 1 made of the material capable of playing a sealing effect are also within the protection range of the utility model, wherein the sealing plug 1 made of the two materials of sponge or rubber has certain elasticity, so that the diameter of the through hole can be slightly smaller than 20mm, the joint degree of the sealing plug 1 and the sampler 4 is ensured, the sealing plug 1 is used for sealing the gap between the sampler 4 and the detection hole 9, so that when the sponge is selected as the material of the sealing plug 1, the thickness of the side wall of the sponge plug is slightly larger, the design of the size of the sealing plug 1 made of other materials needs to be selected in combination with the material itself, for example, if rubber which is slightly harder than sponge is selected as the sealing plug 1, the thickness of the side wall is basically the same as or slightly larger than the gap between the sampler 4 and the detection hole 9, and the thickness of the side wall is preferably made to be capable of being tightly pressed in the gap.

what make one mention is, generally select cylindrically to the appearance design of sealing plug 1 to match cylindrical detection hole 9 and the sampler 4 of cylindrical structure, but if select this kind of material of similar sponge as sealing plug 1, because the plasticity of this kind of material of sponge is very high, even make cuboid or other irregular polyhedrons, as long as guarantee that the sponge stopper can be filled up and block up the clearance between sampler 4 and the detection hole 9.

in the practical production application, because the sealing plug 1 is sealed as the first layer of check out test set, direct and 9 inner walls of inspection hole contact, wearing and tearing are great, select the sponge as the material of sealing plug 1, be convenient for more processing and change, and in sealed operation, also be convenient for the compaction. The sealing plug 1 of this embodiment is used for shutoff sampler 4 and inspection hole 9 between the clearance, has solved the soil seal technique and has leaded to the problem of sampler 4 inlet port 7 jam, simultaneously for the sealed point of this embodiment can not receive on-the-spot soil property restriction and influence sealed effect.

2) Offer the through hole 8 that supplies sampler 4 to pass in the middle of the sealed lid 2 of this embodiment, through hole 8 is 21 mm's square hole, conveniently reciprocate sealed lid 2, with sealed lid 2 gliding to check point place ground and compaction, be used for blockking on-the-spot sand blown by the wind, sealed the playing guard action to the first layer that sealing plug 1 was done, also can provide certain supporting role for sampler 4 upper end simultaneously, prevent that the sand blown by the wind from causing the destruction to the 4 upper ends of sampler of inserting in the check hole 9 down.

As shown in fig. 2, the sealing cover 2 is a cap with an inner concave part, similar to a hat without a brim, and in order to ensure the stability of the sealing cover 2 in the detection operation, the sealing cover 2 of the present embodiment is made of hard plastic, and is designed to be a cylinder with an outer diameter of 30cm and a height of 10 cm.

It should be noted that the shape design of the sealing cover 2 is not limited, and may be a rectangular parallelepiped, a hemisphere, or a semi-ellipsoid, that is, as long as the lower end surface of the sealing cover 2 is ensured to be horizontal and the sealing point can be covered. In the concrete operation process, through hole 8 on the sealed lid 2 still for sampler 4 down insert the in-process and provide limiting displacement, prevent that sampler 4 from rocking about in inspection hole 9 and causing inlet port 7 to block up.

3) The setting of 4 outer wall surfaces of sampler is hugged closely to 3 inner walls of sealing washer of this embodiment, the internal diameter of sealing washer 3 of this embodiment is 15mm, and sealing washer 3 is for the clearance between sealed through hole 8 and the sampler 4, the concrete shape design of sealing washer 3 is a 21mm x 21 mm's cuboid rubber block for a cross sectional dimension, an internal diameter is seted up at the center and is 15mm aperture, 4 outer wall surfaces of sampler are hugged closely to the aperture inner wall, the outer lane is used for sealing the clearance between through hole 8 and the sampler 4, accomplish the third layer and seal.

it should be noted that, the shape of the sealing ring 3 is generally adapted to the through hole 8, so that the sealing effect is improved and the sealing operation is convenient, but may not be adapted, for example, even if the shape of the through hole 8 is square, the outer ring of the sealing ring 3 may also be made into a circle, and at this time, the interface of the outer ring of the circular sealing ring 3 needs to be larger than the size of the through hole 8, so that the sealing ring 3 may be tightly packed in the gap between the through hole 8 and the outer wall of the sampler 4 by pressing down, thereby completing the third layer of sealing.

The three seal structure simple structure of this embodiment has effectively solved current ground gas sampling equipment, and the problem of the easy jam of inlet port 7 of sampler 4 during sealed operation, and three seal structure organic cooperation makes the sealed effect of sealed point, no longer receives the influence of check point environment.

example 2

The device for measuring and taking the ground gas comprises a sealing assembly, wherein the sealing assembly is applied to a sampler 4 for FD216 radon detector equipment, the outer diameter of the sampler 4 in the embodiment is 40mm, the sealing assembly comprises a sealing plug 1, a sealing cover 2 and a sealing ring 3 which are sequentially sleeved on the sampler 4 from bottom to top, the sealing plug 1 is a sponge plug, a through hole matched with the cross section of the sampler 4 in size is formed in the middle of the sponge plug, the sponge plug is made into a cylindrical shape, the cylindrical outer diameter is 50-60 mm, and the sponge plug can be compacted in a gap between the inner wall of a detection hole 9 and the outer wall of the sampler 4 by an operator by hands; as shown in fig. 3 and 4, the sealing cover 2 of the present embodiment includes a cover body 201, an outer edge 202 is disposed on the periphery of the bottom edge of the cover body 201, and is similar to a cap with an edge, the whole sealing cover 2 is more stable due to the arrangement of the outer edge 202, a through hole 8 for a sampler 4 to pass through is disposed in the middle of the sealing cover 2 of the present embodiment, the through hole 8 is a circular hole with an inner diameter of 44mm, an O-shaped sealing ring is correspondingly selected for the sealing ring 3, the inner diameter of the sealing ring 3 is 35mm, the thickness of the sealing ring is 2mm, that is, the outer diameter of the.

it is worth mentioning that, the preferred rubber material of sealing washer 3, because the elasticity speciality of rubber, the utility model discloses a 3 internal diameters of sealing washer generally set up to 0.75 ~ 0.875 times of 4 external diameters of sampler, make the inseparabler laminating of sealing washer 3 at 4 outer wall surfaces of sampler, improve the leakproofness of binding face. If sealing washer 3 internal diameter is too big, lead to sealed effect greatly reduced, if the internal diameter undersize of sealing washer 3, can cause the oppression to sampler 4 outer wall, cause the damage to sampler 4.

In order to achieve higher stability than that of rigid plastic, the seal cap 2 of the present embodiment is made of stainless steel, and may be made of metal such as iron or copper in addition to stainless steel. The cover body 201 of the sealing cover 2 may also be made into a "inverted basin" as shown in fig. 6, a hemisphere as shown in fig. 7, or the cover body 201 as shown in fig. 8, in terms of the external design, the upper layer of the cover body 201 as shown in fig. 8 is a solid, and the lower layer is concave, which is more stable than that shown in fig. 6 and 7, and it should be noted that the through hole 8 in the sealing cover 2 as shown in fig. 7 needs to be selected to be the sealing ring 3 adapted to the shape thereof. The sealing cap 2 shown in fig. 6, 7 or 8 may also be used without the outer rim 202.

The embodiment also provides a using method of the geostationary gas measuring sample taking device, which comprises the following steps:

1) The sampler is measured to the ground gas of equipment this embodiment for sealing plug 1, sealed lid 2 and sealing washer 3 are established on sampler 4 by lower supreme cover in proper order.

2) after the drill steel punches the detection hole 9 on the ground, the assembled sampler 4 in the step 1) is partially inserted into the detection hole 9, that is, the alignment work of the sampler 4 and the detection hole 9 is firstly made, wherein the part refers to the lower end tip part of the sampler 4 or comprises the tip part and a part of the air inlet hole 7, so as to prevent the sampler 4 from being inserted too long downwards, when the upper end does not have the supporting and limiting function, the sampler 4 in the detection hole 9 shakes left and right, and soil particles on the inner wall of the detection hole 9 block the air inlet hole 7.

After the alignment is completed, the sealing plug 1 is used for plugging a gap between the sampler 4 and the detection hole 9, as shown in fig. 5, so that the problem that the air inlet 7 is easily blocked due to the falling of soil particles caused by the fact that the sampler 4 slides to a corresponding detection position of the detection hole 9 and then is sealed in the prior operation is effectively solved; then, seal lid 2 is compacted again on inspection hole 9 subaerial for the central axis of through hole 8 central axis keeps unanimous with the central axis of inspection hole 9, insert sampler 4 to inspection hole 9 bottom again, at this moment, under the spacing of through hole 8 and sealing plug 1, sampler 4 can be more stable down inserts to the corresponding detection position in inspection hole 9, and simultaneously, also avoided inserting under the present sealed operation sampler 4 and bump the air inlet 7 jam problem that the wall caused easily, at last seal 3 shutoff through hole 8 of seal lid 2 and the clearance between sampler 4, prevent that gas and the gas in the atmosphere from filling up each other in inspection hole 9, further increase sealed effect, accomplish seal assembly's operation, the detection gas in the sampler 4 loops through air cock 5, the hose, the detector on the connector 6, carry out the detection of bleeding.

Example 3

The structure of the sampler for measuring terrestrial gas according to the present embodiment is substantially the same as that of embodiment 2, and further, in order to further improve the degree of adhesion between the sealing cap 2 and the ground surface of the detection point, a sealing layer is provided on the surface of the sealing cap 2 in contact with the ground surface, such as the sealing cap 2 shown in fig. 2, and a rubber layer is attached to the surface of the sealing cap 201 in contact with the ground surface according to the present embodiment.

as shown in fig. 4, 6, 7 or 8, a circle of the cover body 201 contacting the ground is a circle of the outer rim 202 contacting the ground, in order to further improve the sealing effect and facilitate the installation of the sealing layer, an annular groove is formed in the bottom surface of the outer rim 202, and a rubber ring is arranged in the annular groove.

Example 4

The device for measuring and taking the geosmin comprises a sealing assembly, wherein the sealing assembly is applied to a sampler 4 for RAD7 radon detector equipment, the outer diameter of the sampler 4 is 40mm, and the sealing assembly comprises a sealing plug 1, a sealing cover 2 and a sealing ring 3 which are sequentially sleeved on the sampler 4 from bottom to top; the sealing plug 1 is a sponge plug, as shown in fig. 11 and 12, a sealing cone is arranged at the upper end of the sealing plug 1, namely, the sealing cone is positioned in the detection hole 9, a part for sealing a gap between the detection hole 9 and the sampler 4 is a cube, the sealing cone at the upper end of the cube is a quadrangular frustum, a through hole matched with the cross section size of the sampler 4 is arranged in the middle of the sealing plug 1, the sealing cover 2 of the embodiment is made of wood, as shown in fig. 10, a through hole 8 for the sampler 4 to pass through is arranged in the middle of the sealing cover 2, the through hole 8 penetrates through the cover body 201, a sealing slope matched with the sealing cone in shape is arranged at the lower end opening of the through hole 8, the sealing cone and the sealing slope are tightly combined when the sealing cover 2; the outer wall surface of sampler 4 is hugged closely to the sealing washer 3 inner wall of this embodiment, and the through hole 8 of this embodiment is the round hole of internal diameter 44mm, and the corresponding O type sealing washer of selecting of sealing washer 3, and the internal diameter of sealing washer 3 is 30mm, and thickness is 2mm, and sealing washer 3 external diameter is 44mm promptly for the clearance between sealed through hole 8 and sampler 4.

The embodiment also provides a using method of the geostationary gas measuring sample taking device, which comprises the following steps:

1) The sampler is measured to the ground gas of equipment this embodiment for sealing plug 1, sealed lid 2 and sealing washer 3 are established on sampler 4 by lower supreme cover in proper order.

2) After the drill rod drills a detection hole 9 on the ground, the assembled sampler 4 in the 1) is partially inserted into the detection hole 9, namely, the alignment work of the sampler 4 and the detection hole 9 is firstly made, and after the alignment is finished, as shown in fig. 12, a cube at the lower end of the sealing plug 1 is firstly used for plugging a gap between the sampler 4 and the detection hole 9, and then the sealing cover 2 is compacted on the ground where the detection hole 9 is located, so that a sealing slope at the lower end of the through hole 8 in the embodiment is tightly matched with a quadrangular frustum at the upper end of the sealing plug 1, the sealing cover 2 can not only protect the environment of the detection point, but also can achieve a further sealing effect through the combination of the sealing plug 1 and the sealing cover 2, and also enable the sealing plug 1 and the sealing cover 2 to provide a more stable limiting effect for the downward-inserted sampler 4, and more importantly, the central axis of the through hole, and then the sampler 4 is inserted to the bottom of the detection hole 9, and finally the sealing ring 3 is used for plugging the gap between the through hole 8 of the sealing cover 2 and the sampler 4, so that the sealing effect is further improved. After the sealing operation of the sealing assembly is completed, the detection gas in the sampler 4 sequentially passes through the gas nozzle 5, the hose and the detector on the connector 6 to be extracted and detected.

example 5

The structure of the geogas measuring and sampling device of the embodiment is basically the same as that of embodiment 4, except that the sealing cone of the sealing plug 1 of the embodiment is in a truncated cone shape, the sealing plug 1 with the lower end located in the detection hole 9 is a cylinder, the cross-sectional view of the sealing cover 2 is shown in fig. 9, and the sealing slope shape at the lower end of the through hole 8 in the cover body 201 is matched with the truncated cone, when the device is used, after the sealing plug 1 is compacted, the connecting surface between the sealing cone at the lower end and the sealing cone at the upper end is generally kept horizontal to the ground where the detection point is located, so that the sealing degree of the sealing cover 2 and the ground is improved, and the sealing plug 1.

it will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A seal assembly, characterized by: the sealing assembly is applied to the sampler (4), and comprises a sealing plug (1), a sealing cover (2) and a sealing ring (3) which are sequentially sleeved on the sampler (4) from bottom to top;

The sealing plug (1) is used for sealing a gap between the sampler (4) and the detection hole (9);

A through hole (8) for the sampler (4) to pass through is formed in the middle of the sealing cover (2);

The inner wall of the sealing ring (3) is tightly attached to the outer wall surface of the sampler (4), and the sealing ring (3) is used for sealing a gap between the through hole (8) and the sampler (4).

2. The utility model provides a sample ware is got to ground gas survey which characterized in that: comprising a sampler (4) and a sealing assembly according to claim 1.

3. The geogas measurement sampler of claim 2, wherein: the shape of the sealing ring (3) is matched with that of the through hole (8).

4. A geogas measurement sample taking device according to claim 2 or 3, characterised in that: the sealing ring (3) is made of rubber, and the inner diameter of the sealing ring (3) is 0.75-0.875 time of the outer diameter of the sampler (4).

5. The geogas measurement sampler of claim 2, wherein: the sealing plug (1) is a sponge plug.

6. the geogas sample measuring device of claim 2, 3 or 5, wherein: the sealing cover (2) comprises a cover body (201), and a sealing layer is arranged on one surface, in contact with the ground, of the cover body (201).

7. The geogas measurement sample taking device of claim 6, characterized in that: the cover is characterized in that an outer edge (202) is arranged on the periphery of the bottom edge of the cover body (201), an annular groove is formed in the bottom surface of the outer edge (202), and a rubber ring is arranged in the annular groove.

8. The geogas measurement sampler of claim 2, wherein: the upper end of the sealing plug (1) is provided with a sealing cone, and the lower end opening of the through hole (8) is provided with a sealing slope matched with the sealing cone in shape.