CN220759301U

CN220759301U - Gas adsorption sample cabin

Info

Publication number: CN220759301U
Application number: CN202322309268.0U
Authority: CN
Inventors: 郭秋雷; 姚悦; 付一鸣; 侯连华; 王小明; 潘思东
Original assignee: China University of Geosciences
Current assignee: China University of Geosciences
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-04-12
Anticipated expiration: 2033-08-25

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

Gas adsorption sample cabin

Technical Field

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

Background

The gas adsorption and displacement technology has wide application prospect in the fields of reservoir development, gas well yield increase and the like. In order to better develop unconventional natural gas such as shale gas, coal bed gas and the like, and simultaneously utilize carbon dioxide to improve the natural gas recovery ratio, the adsorption, diffusion and displacement behaviors of the unconventional natural gas in the rock stratum are required to be studied in depth, and the unconventional natural gas recovery method has important significance in the aspects of understanding the storage mechanism, development process, resource evaluation and the like of the unconventional natural gas in depth.

In the technical field of gas adsorption and displacement, water has a great influence on competitive adsorption. At present, a sample bin for isothermal adsorption is sealed by a rubber ring, so that the sealing requirement of high-pressure adsorption on an experimental bin is difficult to meet, and water loss exists in the experimental process, so that the precision and accuracy of an experimental result are affected.

Disclosure of Invention

The utility model mainly aims to provide a gas adsorption sample cabin, which aims to solve the problems.

In order to achieve the above object, the present utility model provides a gas adsorption sample chamber, comprising:

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

the sealing assembly comprises a sealing nut and a sealing gasket arranged in the sealing nut, wherein the sealing nut comprises a nut body and an annular inner spigot which are integrally connected, and the annular inner spigot is arranged in one end of the nut body;

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

one end of the sealing bolt, which is far away from the experimental pipeline, is suitable for being inserted into the sealing nut 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.

Optionally, the gasket comprises a gasket body and a pore network connected in the gasket body, wherein the gasket body is made of aluminum materials, and the pore network is made of cast steel materials.

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

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

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 is in threaded connection with the second internal thread in a matched mode.

Optionally, the opening end of the cylinder is provided with a first spherical curved surface bulge.

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

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

Optionally, the cabin body is made of cast steel materials.

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

1. according to the technical scheme, the gas adsorption sample cabin is designed and used for gas adsorption and analysis of rock samples, and comprises an inlet pipeline assembly, a sealing assembly and a cabin body, wherein the inlet pipeline assembly, the sealing assembly and the cabin body are mutually nested and connected to form an inner space capable of containing test powder, the inlet pipeline assembly comprises an experiment pipeline and a sealing bolt, the experiment pipeline penetrates through the sealing bolt along the central axis direction of the sealing bolt and extends to the bottom of the sealing bolt, one end of the experiment pipeline, which is close to the sealing assembly, is required to be in butt joint with the sealing assembly, and adsorption gas is led into the cabin body through the experiment pipeline, so that a high-pressure gas adsorption experiment and a multicomponent gas competitive adsorption experiment can be carried out; in addition, the sealing assembly comprises a sealing gasket and a sealing nut arranged in the sealing gasket, the sealing gasket is easy to deform when being pressed, and the air tightness among the hollow sealing bolt, the sealing gasket and the cabin body can be ensured, so that the air leakage rate is less than 5mbar/h.

2. When the sealing assembly is extruded and deformed, the deformation angle and the deformation direction are mutually complemented, so that the sealing space can be effectively filled, no other space exists between the sealing bolt and the cabin body, no air leakage phenomenon occurs, and good tightness is still kept under the condition of higher pressure.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram showing an exploded structure of a gas adsorption sample cell according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing a front view of a gas adsorption sample cell according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a gas adsorption sample cell according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the structure of a gasket in a gas adsorption sample cell according to an embodiment of the present utility model.

Reference numerals illustrate:

1-an inlet line assembly;

11-an experimental pipeline; 12-sealing bolts;

2-a seal assembly;

21-a seal nut; 211-a nut body; 2111—first internal threads; 212-an annular inner spigot;

22-sealing gasket; 221-a gasket body; 222-pore network;

3-cabin body; 31-a cylinder; 32-an annular male end.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In the technical field of gas adsorption and displacement, water has a great influence on competitive adsorption. At present, a sample bin for isothermal adsorption is sealed by a rubber ring, so that the requirement of high-pressure adsorption on tightness of an experimental bin is difficult to meet, and water loss exists in the experimental process, so that the precision and accuracy of an experimental result are affected.

In order to ensure the tightness and the high pressure resistance of the sample cabin, the embodiment of the utility model provides a gas adsorption sample cabin which is used for gas adsorption and analysis of rock samples, is particularly suitable for gas adsorption experiments, and has the advantages of high pressure resistance, good tightness, convenience in sampling and the like.

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

the inlet pipeline assembly 1 comprises 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 and extends to the bottom of the sealing bolt 12, and one end of the experimental pipeline 11 close to the sealing assembly 2 is required to be in butt joint with the sealing assembly 2. The pressure can be applied to the inner closed space through the experimental line 11.

The inside diameter of the hole of the sealing bolt 12 in this embodiment is within 0.1mm from the outside diameter of the test line 11, the test line 11 is inserted into the inside diameter of the hole of the sealing bolt 12 by clearance fit therebetween, and is completely sealed at both ends by welding, thereby completely fixing the test line 11 to the sealing bolt 12. Whereby the adsorption gas is introduced through the experimental line 11 to perform the sample adsorption test.

The seal assembly 2 includes a seal nut 21 and a seal gasket 22, the seal nut 21 in this embodiment is of a hollow cylindrical structure, and the seal gasket 22 is arranged in the seal nut 21, the seal nut 21 includes a nut body 211 and an annular inner spigot 212 which are integrally connected, and the annular inner spigot 212 is arranged inside one end of the nut body 211, and the seal assembly 2 is conveniently in sealing connection with the cabin 3 through the arrangement of the annular inner spigot 212.

The cabin 3 comprises a cylinder 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 31, so that the cabin 3 and the sealing assembly 2 are in sealing connection through the matching connection of the annular outer spigot 32 and the annular inner spigot 212.

The end of the sealing bolt 12 far away from the experimental pipeline 11 is suitable for being inserted into the inner central hole of the sealing nut 21 in a sealing way, so that the connection between the inlet pipeline assembly 1 and the sealing assembly 2 can be realized; the open side of the nacelle 3 is adapted to be inserted at the side of the sealing nut 21 facing away from the inlet line assembly 1, and the annular outer spigot 32 is adapted to abut against the annular inner spigot 212.

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

After adopting above-mentioned structure, when seal assembly 2 is at extrusion deformation, deformation angle and direction are supplementary each other, can effectively fill sealed space to guarantee that there is not other spaces between gland nut 21 and the cabin body 3, can not appear leaking gas phenomenon, still keep better seal under higher pressure condition.

The sample cabin device has outstanding high pressure resistance and sealing performance, and can simultaneously meet the requirements of high-pressure gas adsorption experiments and multicomponent gas competitive adsorption experiments.

Meanwhile, the sealing gasket 22 is easy to deform when being pressed, so that the air tightness among the hollow sealing nut 21, the hard sealing gasket 22 and the cabin body 3 can be ensured, and the air leakage rate is smaller than 5mbar/h.

Specifically, referring to fig. 4, in the embodiment of the present utility model, the gasket 22 includes a gasket body 221 and a pore network 222 connected in the gasket body 221, the gasket body 221 is made of aluminum material, and the pore network 222 is made of cast steel material. The sealing gasket 22 can be manufactured by adopting a 3D printing mode, so that the efficiency is improved, and the cost is low.

As a preferred embodiment of the present embodiment, the gasket body 221 is made of aluminum, has a light structure, and can satisfy a required structural strength. The pore net 222 is made of steel, and is not damaged by pressure and the like.

Specifically, referring to fig. 4, in the embodiment of the present utility model, the center of the sealing pad 22 is provided with a pore network 222, the diameter of the pore network 222 is 4.95-5.05mm, and the pore diameter of the pore network 222 is 0.09-0.11um.

As the most preferred implementation of this example, the diameter of the mesh 222 is chosen to be 5mm, and the pore diameter of the mesh 222 is 0.1um.

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

Specifically, referring to fig. 2, 3 and 4, in the embodiment of the present utility model, the diameter of the gasket body 221 is 39-41mm, and the thickness is 1.4-1.6mm. As a preferred embodiment of the present example, the gasket body 221 has a diameter of 40mm and a thickness of 1.5mm.

Specifically, referring to fig. 3, in the embodiment of the present utility model, a first internal thread 2111 is provided on the inner hole surface of the nut body 211, a second internal thread is provided on the outer surface of the sealing bolt 12, and the first internal thread 2111 is in threaded connection with the second internal thread.

Specifically, referring to fig. 2 and 3, in the embodiment of the present utility model, the opening end of the cylinder 31 is provided with a first spherical protrusion.

Thereby, the sealing property between the cylinder 31 and the gasket 22 is ensured by the first spherically curved surface protrusion being pressed against the gasket body 221.

Specifically, referring to fig. 2 and 3, in the embodiment of the present utility model, the bottom end of the sealing bolt 12 is provided with a second spherical curved protrusion.

Thereby, the sealability between the sealing bolt 12 and the gasket 22 is ensured by the second spherically curved protrusion being pressed on the other side of the gasket body 221.

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 respectively abut against two end surfaces of the seal nut 21 to form a seal structure. Of course, the specific shapes of the first spherically curved surface protrusion and the second spherically curved surface protrusion may be adjusted in combination with the specific structure of the actual seal nut 21, and may be, for example, planar, triangular, etc. In addition, the first spherical surface protrusion and the second spherical surface protrusion may have different surface structures, and the structural shapes of the first spherical surface protrusion and the second spherical surface protrusion are not limited in this embodiment.

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

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

Specifically, the material of the cabin 3 is made of aluminum as well, and the experimental cost is reduced as much as possible under the condition of meeting the experimental requirement. The tubular body 31 gradually expands from the closed end to the open end, and in view of the fact that the structural material of the tubular body 31 is easily deformed, the open end of the tubular body 31 can be inserted into the seal nut 21 by pressing the open end of the tubular body 31, and when the open end of the tubular body 31 is not pressed, elastic deformation is restored, so that the annular outer spigot 32 is in fit and abutting contact with the annular inner spigot 212.

The specific operation process comprises the following steps:

when the gas adsorption sample cabin is used, firstly, a sample is put into the cabin body 3, then the cabin body 3 is vertically inserted into the sealing nut 21, the annular outer spigot 32 of the cabin body 3 is abutted against the annular inner spigot 212 of the sealing nut 21, then the sealing gasket 22 is put into the sealing nut 21, finally, the sealing bolt 12 is screwed onto the sealing nut 21, the sample cabin is screwed in step by step until the second spherical curved surface bulge of the sealing bolt 12 is abutted against the gasket body 221 of the sealing gasket 22, and the tightness and the high pressure resistance of the sample cabin are realized through extrusion deformation.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

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.