CN220759301U - Gas adsorption sample cabin - Google Patents

Abstract

The utility model discloses a gas adsorption sample cabin, which comprises an inlet pipeline assembly, a sealing assembly and a cabin body, wherein the inlet pipeline assembly comprises an experimental pipeline and a sealing bolt, and the experimental pipeline passes through the sealing bolt along the central axis direction of the sealing bolt; the sealing assembly comprises a sealing gasket and a sealing nut, wherein the sealing nut comprises a nut body and an annular inner spigot, and the annular inner spigot is arranged in one end of the nut body; the cabin body comprises a cylinder body and an annular outer spigot, and the annular outer spigot is arranged outside one end of the opening of the cylinder body; one end of the sealing bolt is suitable for being inserted into the sealing gasket in a sealing way; the opening side of the cabin body is suitable for being inserted into one side of the sealing nut, which is away from the inlet pipeline assembly, and the annular outer spigot is in fit and abutting connection with the annular inner spigot; the sealing bolt and the cylinder body are respectively abutted against two ends of the sealing gasket. The application solves the problems that the existing isothermal adsorption experimental cabin is poor in tightness and high pressure resistance, and gas sampling in the competitive adsorption process is difficult to perform.

Description

A gas adsorption sample chamber

Technical Field

The utility model relates to the technical field of gas adsorption, in particular to a gas adsorption sample cabin.

Background technique

Gas adsorption and displacement technology has broad application prospects in the fields of reservoir development and gas well production increase. In order to better develop unconventional natural gas such as shale gas and coalbed methane, and use carbon dioxide to improve natural gas recovery, it is necessary to conduct in-depth research on the adsorption, diffusion and displacement behavior of unconventional natural gas in rock formations, which is of great significance for in-depth understanding of the unconventional natural gas accumulation mechanism, development process and resource assessment.

In the field of gas adsorption and displacement technology, water has a great influence on competitive adsorption. At present, the sample chambers for isothermal adsorption tests are mostly sealed with rubber rings, which are difficult to meet the sealing requirements of high-pressure adsorption for the experimental chamber, and there is water loss during the experiment, which affects the precision and accuracy of the experimental results.

Utility Model Content

The main purpose of the utility model is to provide a gas adsorption sample cabin, aiming to solve the above problems.

In order to achieve the above-mentioned purpose, the utility model proposes a gas adsorption sample cabin, comprising:

An inlet pipeline assembly, comprising a test pipeline and a sealing bolt, wherein the test pipeline passes through the sealing bolt along the central axis direction of the sealing bolt;

A sealing assembly, comprising a sealing nut and a sealing gasket arranged in the sealing nut, wherein the sealing nut comprises a nut body and an annular inner stopper connected in one piece, and the annular inner stopper is arranged inside one end of the nut body;

The cabin body comprises a cylinder body and an annular outer stopper which are integrally connected, and the annular outer stopper is arranged outside one end of the opening of the cylinder body;

One end of the sealing bolt away from the experimental pipeline is suitable for being sealed and inserted into the sealing nut;

The opening side of the cabin is suitable for being inserted on the side of the sealing nut away from the inlet pipeline assembly, and the annular outer stop is adapted to abut against the annular inner stop;

The sealing bolt and the cylinder are respectively in contact with two ends of the sealing gasket.

Optionally, the sealing gasket includes a gasket body and a porous mesh connected to the gasket body, the gasket body is made of aluminum material, and the porous mesh is made of cast steel material.

Optionally, the diameter of the pore network is 4.95-5.05 mm, and the pore diameter of the pore network is 0.09-0.11 um.

Optionally, the sealing gasket has a diameter of 39-41 mm and a thickness of 1.4-1.6 mm.

Optionally, the inner hole surface of the nut body is provided with a first internal thread, the outer surface of the sealing bolt is provided with a second internal thread, and the first internal thread and the second internal thread are adapted to be threadedly connected.

Optionally, a first spherical curved surface protrusion is provided at the open end of the cylinder.

Optionally, a second spherical curved surface protrusion is provided at the bottom end of the sealing bolt.

Optionally, the outer diameter of the open end of the cylinder is 4.0-4.1 cm, the outer diameter of the closed end of the cylinder is 3.9-4.1 cm, and the wall thickness of the cylinder is 2 mm.

Optionally, the cabin is made of cast steel.

Compared with the prior art, the utility model has the following technical effects:

1. In the technical scheme of the utility model, a gas adsorption sample cabin is designed, which is used for gas adsorption and analysis of rock samples. The gas adsorption sample cabin includes an inlet pipeline assembly, a sealing assembly and a cabin body. The inlet pipeline assembly, the sealing assembly and the cabin body are nested and connected with each other to form an internal space that can accommodate test powder, wherein the inlet pipeline assembly includes an experimental pipeline and a sealing bolt. The experimental pipeline passes through the sealing bolt along the central axis direction of the sealing bolt and extends to the bottom of the sealing bolt. The end of the experimental pipeline close to the sealing assembly needs to be docked with the sealing assembly. The adsorbed gas is introduced into the cabin body through the experimental pipeline, and a high-pressure gas adsorption experiment and a multi-component gas competitive adsorption experiment can be carried out; in addition, the sealing assembly includes a sealing gasket and a sealing nut arranged in the sealing gasket. The sealing gasket is easy to deform when under pressure, which can ensure the gas tightness between the hollow sealing bolt, the sealing gasket and the cabin body, so that the leakage rate is less than 5mbar/h.

2. When the sealing component is deformed by extrusion, the deformation angle and direction complement each other, which can effectively fill the sealing space to ensure that there is no other space between the sealing bolt and the cabin body, and no air leakage will occur, and it can still maintain good airtightness under higher pressure conditions.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

FIG1 is a schematic diagram of the exploded structure of a gas adsorption sample chamber according to an embodiment of the present invention;

FIG2 is a schematic diagram of the front view of the gas adsorption sample chamber in an embodiment of the present utility model;

FIG3 is a schematic cross-sectional view of the gas adsorption sample chamber in an embodiment of the present utility model;

FIG. 4 is a schematic diagram of the structure of a sealing pad in a gas adsorption sample chamber in an embodiment of the present utility model.

Description of Figure Numbers:

1-Inlet pipeline assembly;

11-experimental pipeline; 12-sealing bolt;

2- Sealing assembly;

21-sealing nut; 211-nut body; 2111-first internal thread; 212-annular internal stop;

22-sealing gasket; 221-gasket body; 222-pore net;

3-cabin body; 31-cylinder body; 32-annular outer stop.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

In the field of gas adsorption and displacement technology, water has a great influence on competitive adsorption. At present, the sample chambers for isothermal adsorption tests are mostly sealed with rubber rings, which are difficult to meet the sealing requirements of the experimental chamber for high-pressure adsorption, and there is water loss during the experiment, which affects the precision and accuracy of the experimental results.

In order to ensure the sealing and high pressure resistance of the sample chamber, the embodiment of the utility model proposes a gas adsorption sample chamber, which is used for gas adsorption and analysis of rock samples, and is particularly suitable for gas adsorption experiments. It has the advantages of high pressure resistance, good sealing, and convenient sampling.

To solve the above technical problems, please refer to FIG. 1 . The utility model provides a gas adsorption sample cabin, which includes an inlet pipeline assembly 1, a sealing assembly 2 and a cabin body 3, wherein:

The inlet pipeline assembly 1 includes a test pipeline 11 and a sealing bolt 12. The test pipeline 11 passes through the sealing bolt 12 along the central axis direction of the sealing bolt 12 and extends to the bottom of the sealing bolt 12. One end of the test pipeline 11 close to the sealing assembly 2 needs to be connected to the sealing assembly 2. The internal enclosed space can be pressurized through the test pipeline 11.

The inner diameter of the hole of the sealing bolt 12 in this embodiment is within 0.1 mm of the outer diameter of the experimental pipeline 11. The experimental pipeline 11 is inserted into the inner diameter of the hole of the sealing bolt 12 through a clearance fit, and is completely sealed at both ends by welding, so that the experimental pipeline 11 is completely fixed on the sealing bolt 12. Thus, the adsorbed gas is introduced through the experimental pipeline 11 to perform a sample adsorption test.

The sealing assembly 2 includes a sealing nut 21 and a sealing gasket 22. The sealing nut 21 in this embodiment is a hollow cylindrical structure, and the sealing gasket 22 is arranged in the sealing nut 21. The sealing nut 21 includes an integrally connected nut body 211 and an annular inner stop 212, and the annular inner stop 212 is arranged inside one end of the nut body 211. The setting of the annular inner stop 212 facilitates the sealing connection between the sealing assembly 2 and the cabin body 3.

The cabin body 3 includes an integrally connected cylinder body 31 and an annular outer stop 32, and the annular outer stop 32 is arranged outside one end of the opening of the cylinder body 31, so that the sealing connection between the cabin body 3 and the sealing assembly 2 is achieved through the matching connection between the annular outer stop 32 and the annular inner stop 212.

The end of the sealing bolt 12 away from the experimental pipeline 11 is suitable for being sealed and inserted in the internal center hole of the sealing nut 21, so that the connection between the inlet pipeline assembly 1 and the sealing assembly 2 can be achieved; the opening side of the cabin body 3 is suitable for being inserted on the side of the sealing nut 21 away from the inlet pipeline assembly 1, and the annular outer stop 32 is adapted to abut against the annular inner stop 212.

The sealing bolt 12 and the cylindrical body 31 are respectively in contact with both ends of the sealing gasket 22 .

After adopting the above structure, when the sealing component 2 is deformed by extrusion, the deformation angle and direction complement each other, which can effectively fill the sealing space to ensure that there is no other space between the sealing nut 21 and the cabin body 3, and no air leakage will occur, and good airtightness can be maintained under higher pressure conditions.

The sample chamber device has outstanding high pressure resistance and sealing performance, and can meet the requirements of both high pressure gas adsorption experiments and multi-component gas competitive adsorption experiments.

At the same time, the sealing gasket 22 is easily deformed when under pressure, which can ensure the gas tightness between the hollow sealing nut 21, the hard and tight sealing gasket 22 and the cabin 3, so that the leakage rate is less than 5mbar/h.

Specifically, referring to FIG. 4 , in a specific solution of the present utility model, the sealing gasket 22 includes a gasket body 221 and a porous net 222 connected to the gasket body 221. The gasket body 221 is made of aluminum material, and the porous net 222 is made of cast steel. The sealing gasket 22 can be made by 3D printing, which improves efficiency and is low in cost.

As a preferred implementation of this embodiment, the gasket body 221 is made of aluminum, which is light and can meet the required structural strength. The porous mesh 222 is made of steel and will not be damaged by pressure or the like.

Specifically, please refer to FIG. 4 , in a specific solution of the present invention, a porous mesh 222 is provided at the center of the sealing gasket 22 , the diameter of the porous mesh 222 is 4.95-5.05 mm, and the pore diameter of the porous mesh 222 is 0.09-0.11 um.

As the best preferred implementation mode of this embodiment, the diameter of the pore mesh 222 is selected to be 5 mm, and the pore diameter of the pore mesh 222 is 0.1 um.

It should be particularly noted that the porous network 222 of the sealing gasket 22 in the present application can effectively reduce water loss and prevent sample backflow.

Specifically, referring to Figures 2, 3 and 4, in the specific solution of the present invention, the diameter of the gasket body 221 is 39-41 mm and the thickness is 1.4-1.6 mm. As a preferred implementation of this embodiment, the diameter of the gasket body 221 is 40 mm and the thickness is 1.5 mm.

Specifically, please refer to Figure 3. In the specific solution of the present utility model, the inner hole surface of the nut body 211 is provided with a first internal thread 2111, and the outer surface of the sealing bolt 12 is provided with a second internal thread. The first internal thread 2111 is threadedly connected with the second internal thread.

Specifically, referring to FIGS. 2 and 3 , in a specific solution of the present invention, a first spherical curved surface protrusion is provided at the open end of the cylinder 31 .

Thus, the first spherical curved surface protrusion is pressed on the gasket body 221 to ensure the sealing between the cylinder 31 and the sealing gasket 22.

Specifically, referring to FIGS. 2 and 3 , in a specific solution of the present invention, a second spherical curved protrusion is provided at the bottom end of the sealing bolt 12 .

Thus, the second spherical curved surface protrusion is pressed on the other side of the gasket body 221 to ensure the sealing performance between the sealing bolt 12 and the sealing gasket 22 .

It can be understood that the first spherical curved surface protrusion and the second spherical curved surface protrusion in this embodiment have the same curved surface structure, and are respectively abutted against the two end surfaces of the sealing nut 21 to form a sealing structure. Of course, the specific shapes of the first spherical curved surface protrusion and the second spherical curved surface protrusion can also be adjusted in combination with the specific structure of the actual sealing nut 21, for example, they can be set to a plane shape, a triangle shape, etc. In addition, the first spherical curved surface protrusion and the second spherical curved surface protrusion can also have different curved surface structures, and this embodiment does not impose any restrictions on the structural shapes of the first spherical curved surface protrusion and the second spherical curved surface.

Specifically, in the specific solution of the present utility model, the outer diameter of the open end of the cylinder 31 is 4.0-4.1 cm, the outer diameter of the closed end of the cylinder 31 is 3.9-4.1 cm, and the wall thickness of the cylinder 31 is 2 mm.

Preferably, the outer diameter of the open end of the cylinder 31 is 4.1 cm, the outer diameter of the closed end of the cylinder 31 is 4 cm, and the wall thickness of the cylinder 31 is 2 mm.

Specifically, the material of the cabin 3 is also made of aluminum, and the experimental cost is reduced as much as possible under the condition of meeting the experimental requirements. The cylinder 31 gradually expands outward from the closed end to the open end. Since the structural material of the cylinder 31 is easy to deform, the open end of the cylinder 31 can be inserted into the sealing nut 21 by pressing the open end of the cylinder 31. When the open end of the cylinder 31 is not pressed, the elastic deformation is restored, so that the annular outer stop 32 and the annular inner stop 212 are adapted to abut.

Specific operation process:

When the gas adsorption sample chamber is in use, the sample is first placed in the chamber body 3, and then the chamber body 3 is vertically inserted into the sealing nut 21, and the annular outer stop 32 of the chamber body 3 is abutted against the annular inner stop 212 of the sealing nut 21, and then the sealing gasket 22 is placed in the sealing nut 21, and finally the sealing bolt 12 is screwed into the sealing nut 21, and is screwed in gradually until the second spherical curved surface protrusion of the sealing bolt 12 abuts against the gasket body 221 of the sealing gasket 22, and the sealing and high pressure resistance of the sample chamber are achieved through extrusion deformation.

The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly/indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims (9)

1. A gas adsorption sample cell comprising:

an inlet pipeline assembly (1) comprising an experimental pipeline (11) and a sealing bolt (12), wherein the experimental pipeline (11) passes through the sealing bolt (12) along the central axis direction of the sealing bolt (12);

the sealing assembly (2) comprises a sealing nut (21) and a sealing gasket (22) arranged in the sealing nut (21), wherein the sealing nut (21) comprises a nut body (211) and an annular inner spigot (212) which are integrally connected, and the annular inner spigot (212) is arranged in one end of the nut body (211);

the cabin body (3) comprises a cylinder body (31) and an annular outer spigot (32) which are integrally connected, and the annular outer spigot (32) is arranged outside one end of the opening of the cylinder body (31);

one end of the sealing bolt (12) far away from the experimental pipeline (11) is suitable for being inserted into the sealing nut (21) in a sealing way;

the opening side of the cabin body (3) is suitable for being inserted into one side of the sealing nut (21) which is away from the inlet pipeline assembly (1), and the annular outer spigot (32) is in fit and abutting connection with the annular inner spigot (212);

the seal bolt (12) and the cylinder (31) are respectively abutted against both ends of the seal gasket (22).

2. The gas adsorption sample capsule of claim 1, wherein the gasket (22) comprises a gasket body (221) and a mesh of pores (222) connected within the gasket body (221), the gasket body (221) being made of an aluminum material, the mesh of pores (222) being made of a cast steel material.

3. The gas adsorption sample capsule of claim 2, wherein the pore network (222) has a diameter of 4.95-5.05mm and the pore network (222) has a pore diameter of 0.09-0.11um.

4. A gas adsorbing sample compartment according to claim 2, characterized in that the gasket body (221) has a diameter of 39-41mm and a thickness of 1.4-1.6mm.

5. The gas adsorption sample capsule according to claim 1, wherein the inner hole surface of the nut body (211) is provided with a first inner thread (2111), the outer surface of the sealing bolt (12) is provided with a second inner thread, and the first inner thread (2111) is in threaded connection with the second inner thread.

6. The gas adsorption sample cell of claim 2, wherein the open end of the cylinder (31) is provided with a first spherically curved protrusion.

7. The gas adsorption sample capsule according to claim 2, wherein the bottom end of the sealing bolt (12) is provided with a second spherically curved protrusion.

8. The gas adsorption sample capsule according to claim 2, wherein the open end of the cylinder (31) has an outer diameter of 4.0-4.1cm, the closed end of the cylinder (31) has an outer diameter of 3.9-4.1cm, and the wall thickness of the cylinder (31) is 2mm.

9. A gas adsorbing sample compartment according to any of claims 1-8, characterized in that the compartment body (3) is made of cast steel material.