Detection equipment for shale gas content

Abstract

The invention provides shale gas content detection equipment, and relates to the technical field of shale gas content detection. An exhaust pipe is welded to the right side of the outer wall of the detection barrel and connected with the detector through a pipeline. A first sieve plate with a circular plate-shaped structure is fixed in the detection barrel body, and first sieve holes are formed in the first sieve plate in an array manner; a cover plate is fixed to the top of the base, a first rotating shaft is rotationally arranged on the cover plate, and four impellers are fixed to the first rotating shaft. The equipment adopts a totally-closed crushing structure, and a built-in first motor drives an impeller to complete shale crushing in a detection barrel, so that the problem of gas leakage caused by traditional open crushing is avoided; the stepped cover plate and the frustum-shaped first sealing block are matched with the inclined sealing seat to form double mechanical sealing, so that the air tightness of the cover plate is further enhanced, the gas is ensured to be completely retained in the crushing process, the device is particularly suitable for adsorbing samples with high gas proportion, and the authenticity of detection data is ensured from the source.

Description

Technical Field

[0001] The present invention relates to the technical field of shale gas content detection, and in particular to a device for detecting shale gas content. Background Art

[0002] Shale is a common sedimentary rock and a type of mudstone. It is mainly composed of clay minerals (such as kaolinite, montmorillonite, illite, etc.) and fine-grained debris (quartz, feldspar, etc.). It has a unique bedding structure and foliated cleavage, and is easily split into thin sheets along the bedding plane. The detection of shale gas content is a key link in shale gas exploration and development. There are many detection methods, and isothermal adsorption is one of them. Based on Langmuir adsorption theory, the adsorbed gas content of shale samples at different pressures is measured, the adsorption isotherm is established, and the adsorbed gas content is calculated in combination with the reservoir pressure.

[0003] During testing, the existing device needs to first crush the shale into particles, and then add the particles into the detection device for testing. During the crushing process, gas unloading occurs, and it is not possible to improve the crushing inside the detection device to improve the detection accuracy. The existing device has a single sealing structure, which is prone to poor sealing during the detection process, affecting the detection accuracy. Summary of the Invention

[0004] The present invention relates to a device for detecting shale gas content, which solves the problem that the existing device needs to first crush the shale into particles during detection, and then add the particles into the detection device for detection, causing gas unloading during the crushing process, and cannot be improved by crushing inside the detection device to improve detection accuracy; the existing device has a single sealing structure, which is prone to poor sealing during the detection process, thereby affecting the detection accuracy.

[0005] The present invention provides a device for detecting shale gas content, which specifically includes: a detection barrel body; an exhaust pipe is welded to the right side of the outer wall of the detection barrel body, and the exhaust pipe is connected to the detector through a pipeline; a first sieve plate with a circular plate structure is fixed inside the detection barrel body, and the first sieve plate is provided with first sieve holes in an array; a cover plate is fixed on the top, a first rotating shaft rotates on the cover plate, four impellers are fixed on the first rotating shaft, a first motor is fixed on the top surface of the cover plate, the first motor is electrically connected to the external power switch and the external power supply, and the output shaft of the first motor is fixed on the first rotating shaft.

[0006] Furthermore, the first rotating shaft, impeller and first motor together constitute a crushing assembly; the cover plate is a stepped structure, the outer wall of the lower half of the cover plate contacts the inner wall of the detection barrel body, and the bottom end surface of the upper half of the cover plate contacts the top end surface of the detection barrel body.

[0007] Furthermore, a base is welded on the outer wall of the detection barrel body. The base is an annular structure. Two first hydraulic cylinders are fixed on the top surface of the base. The protruding ends of the two first hydraulic cylinders are fixed on the bottom end surface of the upper half of the cover plate.

[0008] Furthermore, an adjustment component is installed in the detection barrel body, and the adjustment component consists of a mounting seat, a second rotating shaft, a second sieve plate, a second sieve hole, a worm gear, a worm, a second motor and a turning rake. A mounting seat is fixed in the detection barrel body, and a second rotating shaft rotates on the mounting seat. A second sieve plate is welded to the top end surface of the second rotating shaft, and the top end surface of the second sieve plate contacts the bottom end surface of the first sieve plate. The second sieve plate is provided with second sieve holes in an array, and the second sieve holes are the same size as the first sieve holes and are aligned in position.

[0009] Furthermore, a worm wheel is welded on the second rotating shaft, a worm is rotated on the mounting seat, the worm is engaged with the worm wheel, a second motor is fixed on the mounting seat, and the output shaft of the second motor is fixed on the worm wheel.

[0010] Furthermore, a turning rake is welded below the outer wall of the second rotating shaft, and the bottom of the turning rake contacts the bottom end surface of the inner wall of the detection barrel.

[0011] Furthermore, a protective cover made of metal is fixed on the outer wall of the detection barrel, a heating tube is provided in the protective cover, and the heating tube is electrically connected to an external power supply.

[0012] Furthermore, a sealing assembly is installed in the detection barrel body, and the sealing assembly consists of a seat body, a second hydraulic cylinder and a second sealing block. A seat body is fixed on the inner wall of the detection barrel body, and the seat body is a concave structure. A second hydraulic cylinder is fixed on the left end face of the inner wall of the seat body, and a second sealing block is fixed on the protruding end of the second hydraulic cylinder.

[0013] Furthermore, the second sealing block has a stepped structure, the outer wall of the right half of the second sealing block contacts the inner wall of the exhaust pipe, and the right end surface of the left half of the second sealing block contacts the left end surface of the exhaust pipe.

[0014] Furthermore, a ring-shaped sealing seat is welded on the inner wall of the detection barrel, and the inner side of the sealing seat is inclined; a first sealing block with a frustum-shaped structure is welded on the bottom end face of the cover, and when the cover is closed, the first sealing block contacts the sealing seat.

[0015] The present invention provides a device for detecting shale gas content, which has the following beneficial effects: The equipment adopts a fully enclosed crushing structure; the built-in first motor drives the impeller to complete the shale crushing in the detection barrel, avoiding the gas leakage problem caused by traditional open crushing; the stepped cover plate and the frustum-shaped first sealing block cooperate with the inclined sealing seat to form a double mechanical seal, which further enhances the airtightness at the cover plate and ensures the complete retention of gas during the crushing process. It is especially suitable for samples with a high proportion of adsorbed gas, ensuring the authenticity of the test data from the source.

[0016] It can realize dynamic screening and turning functions; the first sieve plate and the second sieve plate can flexibly adjust the degree of alignment of the sieve holes through the worm gear transmission, which can not only control the screening particle size and realize secondary crushing of large particles, but also stir the bottom sample by rotating the turning rake under the second sieve plate, eliminate dead corners of accumulation, make the sample fully contact with the detection environment, improve the uniformity of gas release, and reduce the repeatability error of the results.

[0017] In terms of environmental control, the heating tube inside the metal protective cover can be heated regularly to maintain a constant temperature inside the barrel, thus preventing temperature fluctuations from affecting the adsorption-desorption equilibrium and improving the accuracy of the adsorbed gas volume calculation in the isothermal adsorption experiment. The sealing assembly at the exhaust pipe is driven by a second hydraulic cylinder, and the stepped sealing block is inserted into the pipe during the non-exhaust phase to form a surface contact seal. The risk of gas leakage is extremely low, and the gas release path can be precisely controlled to ensure that there is no leakage throughout the entire process.

[0018] In terms of operational convenience; the first hydraulic cylinder drives the cover to rise and fall, replacing the traditional manual fixing method. One person can quickly complete sample loading, saving a lot of time and physical effort; the modular design of each functional component facilitates maintenance and replacement, and the inclined inner wall of the sealing seat can also guide the debris to slide down, reducing the workload of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached figure: Figure 1 The figure shows an axial structural diagram of a device for detecting shale gas content according to the present invention; Figure 2 The figure shows a partially cutaway schematic diagram of the main structure of the shale gas content detection device of the present invention; Figure 3 The present invention is shown Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 The figure shows a partially cutaway axial structural diagram of a shale gas content detection device according to the present invention; Figure 5The diagram shows the axial structure of the adjustment assembly of the present invention after partial cutaway; Figure 6 The figure shows the axial structural diagram of the cover plate, the sealing seat and the first sealing block of the present invention; Figure 7 The axially disassembled structure diagram of the cover plate, the sealing seat and the first sealing block of the present invention is shown; Figure 8 A schematic diagram of the axial structure of the sealing assembly of the present invention is shown.

[0022] Reference Signs List 1. Detection barrel; 101. Cover plate; 102. Sealing seat; 103. First sealing block; 104. Base; 105. First hydraulic cylinder; 106. Exhaust pipe; 2. First sieve plate; 201. First sieve hole; 3. Crushing assembly; 301. First rotating shaft; 302. Impeller; 303. First motor; 4. Adjustment assembly; 401. Mounting seat; 402. Second rotating shaft; 403. Second sieve plate; 404. Second sieve hole; 405. Worm gear; 406. Worm; 407. Second motor; 408. Turning rake; 5. Protective cover; 6. Heating tube; 7. Detector; 8. Sealing assembly; 801. Base; 802. Second hydraulic cylinder; 803. Second sealing block. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined in this manner in the embodiments of the present invention.

[0025] The terms "first," "second," and similar terms used in the embodiments of the present invention do not indicate any order, quantity, or importance, but are simply used to distinguish different components. Terms such as "a," "an," or "the" do not indicate a limit on quantity, but rather indicate the presence of at least one. Similarly, terms such as "include" or "comprise" mean that the element or object preceding the term encompasses the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "back," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of the present invention. However, it should be understood that these terms are used solely to facilitate the description of the embodiments shown in the figures and do not require that the actual device be constructed or operated in a specific orientation. In the following description, terms such as "connect," "couple," "fixed," and "attached" may refer to a direct connection between two elements or structures without any other elements or structures between them, or an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein.

[0026] Example 1: Please refer to Figures 1 to 8 : The present invention proposes a device for detecting shale gas content, comprising: a detection barrel 1; an exhaust pipe 106 is welded to the right side of the outer wall of the detection barrel 1, and the exhaust pipe 106 is connected to the detector 7 through a pipeline; a first sieve plate 2 with a circular plate structure is fixed inside the detection barrel 1, and the first sieve plate 2 is provided with first sieve holes 201 in an array; a cover plate 101 is fixed on the top, a first rotating shaft 301 is rotated on the cover plate 101, four impellers 302 are fixed on the first rotating shaft 301, a first motor 303 is fixed on the top surface of the cover plate 101, and the first motor 303 is connected to the first motor 303. The power switch of the peripheral device is electrically connected to the external power supply, and the output shaft of the first motor 303 is fixed on the first rotating shaft 301. During use, shale to be tested is added to the detection barrel 1 to drive the first motor 303 to rotate. The first motor 303 drives the first rotating shaft 301 and the impeller 302 to rotate. Under the action of the impeller 302, the shale in the detection barrel 1 can be crushed. The crushed shale is screened through the first sieve hole 201 and falls down for detection. Compared with the existing device, this device crushes the shale in the detection barrel 1, avoids gas leakage, and has higher detection accuracy.

[0027] Among them, the first rotating shaft 301, the impeller 302 and the first motor 303 together constitute the crushing assembly 3; the cover plate 101 is a stepped structure, the outer wall of the lower half of the cover plate 101 contacts the inner wall of the detection barrel body 1, and the bottom end surface of the upper half of the cover plate 101 contacts the top surface of the detection barrel body 1. During use, because the outer wall of the lower half of the cover plate 101 contacts the inner wall of the detection barrel body 1 and the bottom end surface of the upper half of the cover plate 101 contacts the top surface of the detection barrel body 1, the sealing performance between the cover plate 101 and the detection barrel body 1 is improved, thereby avoiding gas leakage during the subsequent pressurization process.

[0028] Among them, a base 104 is welded on the outer wall of the detection barrel body 1. The base 104 is a ring structure. Two first hydraulic cylinders 105 are fixed on the top surface of the base 104. The protruding ends of the two first hydraulic cylinders 105 are fixed on the bottom end surface of the upper half of the cover plate 101. When opening and closing the cover plate 101, the two first hydraulic cylinders 105 are driven to extend and retract, and there is no need to open it manually, which saves the physical energy of the staff, facilitates the feeding of shale, and saves time compared with manually opening the cover plate 101, thereby improving the efficiency of detection.

[0029] Among them, an adjustment component 4 is installed in the detection barrel body 1, and the adjustment component 4 consists of a mounting seat 401, a second rotating shaft 402, a second sieve plate 403, a second sieve hole 404, a worm gear 405, a worm 406, a second motor 407 and a turning rake 408. A mounting seat 401 is fixed in the detection barrel body 1, and a second rotating shaft 402 rotates on the mounting seat 401. A second sieve plate 403 is welded to the top surface of the second rotating shaft 402. The top surface of the second sieve plate 403 contacts the bottom end surface of the first sieve plate 2, and the second sieve hole 404 is arranged in an array on the second sieve plate 403. The second sieve hole 404 is the same size as the first sieve hole 201 and is aligned in position.

[0030] Among them, a worm gear 405 is welded on the second rotating shaft 402, and a worm 406 is rotated on the mounting seat 401, and the worm 406 is engaged with the worm wheel 405. A second motor 407 is fixed on the mounting seat 401, and the output shaft of the second motor 407 is fixed on the worm 406. When adjusting the screening quality, the second motor 407 is driven to rotate, and the second motor 407 drives the worm 406 to rotate. Under the meshing transmission of the worm 406 and the worm wheel 405, the rotation adjustment of the second rotating shaft 402 and the second screen plate 403 can be realized, and the rotation adjustment of the second sieve plate 403 can be completed by completing the gradual staggering of the second sieve hole 404 and the first sieve hole 201, and the adjustment of the screening quality is realized at this time.

[0031] Among them, a turning rake 408 is welded at the lower position of the outer wall of the second rotating shaft 402, and the bottom of the turning rake 408 is in contact with the bottom end surface of the inner wall of the detection barrel 1. During use, when the crushed shale needs to be turned, the second motor 407 is driven to rotate, and the second motor 407 drives the worm 406 to rotate. Under the meshing transmission of the worm 406 and the worm wheel 405, the rotation of the second rotating shaft 402 and the turning rake 408 can be realized. The shale can be turned by rotating the turning rake 408, thereby improving the detection accuracy.

[0032] Among them, a metal protective cover 5 is fixed on the outer wall of the detection barrel body 1, and a heating tube 6 is arranged inside the protective cover 5. The heating tube 6 is electrically connected to the external power supply. During use, the heat emitted regularly by the heating tube 6 can ensure the constant temperature inside the detection barrel body 1, thereby ensuring the detection accuracy. Moreover, through the setting of the protective cover 5, the leakage of heat from the heating tube 6 can be reduced, ensuring that the heating tube 6 has more heat to achieve the constant temperature of the crushed shale, and the practicality is high.

[0033] Among them, a sealing assembly 8 is installed in the detection barrel body 1, and the sealing assembly 8 consists of a seat body 801, a second hydraulic cylinder 802 and a second sealing block 803. A seat body 801 is fixed on the inner wall of the detection barrel body 1. The seat body 801 is a concave structure. The second hydraulic cylinder 802 is fixed on the left end face of the inner wall of the seat body 801, and the second sealing block 803 is fixed on the protruding end of the second hydraulic cylinder 802.

[0034] Among them, the second sealing block 803 has a stepped structure, the outer wall of the right half of the second sealing block 803 contacts the inner wall of the exhaust pipe 106, and the right end face of the left half of the second sealing block 803 contacts the left end face of the exhaust pipe 106. During use, by driving the second hydraulic cylinder 802 to extend, the second hydraulic cylinder 802 drives the second sealing block 803 to be inserted into the exhaust pipe 106 to complete the sealing, avoiding air leakage in the non-exhaust stage, and the stepped structure of the second sealing block 803 has a better sealing effect.

[0035] Example 2, based on Example 1, Figures 1-8 As shown, a ring-shaped sealing seat 102 is welded on the inner wall of the detection barrel body 1, and the inner side of the sealing seat 102 is inclined; a first sealing block 103 with a frustum-shaped structure is welded on the bottom end face of the cover plate 101. When the cover plate 101 is closed, the first sealing block 103 contacts the sealing seat 102. During use, the first sealing block 103 and the sealing seat 102 can improve the sealing performance of the cover plate 101, and avoid debris from remaining on the sealing seat 102 when shale is added.

[0036] The working principle of this embodiment is as follows: the two first hydraulic cylinders 105 are driven to extend and open the cover plate 101, and shale is added into the detection barrel 1. After the addition is completed, the first hydraulic cylinder 105 is driven to retract and close the cover plate 101; the first motor 303 is driven to rotate, and the first motor 303 drives the first rotating shaft 301 and the impeller 302 to rotate. Under the action of the impeller 302, the shale in the detection barrel 1 can be crushed, and the crushed shale is screened through the first sieve hole 201 and falls downward; when the screening quality is adjusted, the second motor 407 is driven to rotate, and the second motor 407 drives the worm 406 to rotate. 5, the second rotating shaft 402 and the second sieve plate 403 can be rotated and adjusted, and the second sieve hole 404 and the first sieve hole 201 can be gradually staggered by the rotation adjustment of the second sieve plate 403, thereby achieving the adjustment of the screening quality; the second motor 407 is driven to rotate, and the second motor 407 drives the worm 406 to rotate. Under the meshing transmission of the worm 406 and the worm wheel 405, the second rotating shaft 402 and the turning rake 408 can be rotated to realize the turning of the crushed shale; the power supply of the heating tube 6 is turned on to achieve the constant temperature inside the detection barrel 1; the inside of the detection barrel 1 is pressurized by the detector 7 for detection.

Claims

1. A device for detecting shale gas content, characterized in that: include: A detection barrel (1); an exhaust pipe (106) is welded to the right side of the outer wall of the detection barrel (1), and the exhaust pipe (106) is connected to the detector (7) through a pipeline; a first sieve plate (2) with a circular plate structure is fixed inside the detection barrel (1), and the first sieve plate (2) is provided with first sieve holes (201) in an array; a cover plate (101) is fixed on the top, a first rotating shaft (301) is rotated on the cover plate (101), four impellers (302) are fixed on the first rotating shaft (301), and the top of the cover plate (101) is fixed with a first rotating shaft (301). A first motor (303) is fixed on the surface, the first motor (303) is electrically connected to an external power switch and an external power supply, and an output shaft of the first motor (303) is fixed on the first rotating shaft (301); the first rotating shaft (301), the impeller (302) and the first motor (303) together constitute a crushing assembly (3); the cover plate (101) is a stepped structure, the outer wall of the lower half of the cover plate (101) contacts the inner wall of the detection barrel body (1), and the bottom end surface of the upper half of the cover plate (101) contacts the top end surface of the detection barrel body (1).

2. The shale gas content detection device according to claim 1, characterized in that: A base (104) is welded on the outer wall of the detection barrel (1). The base (104) is an annular structure. Two first hydraulic cylinders (105) are fixed to the top surface of the base (104). The protruding ends of the two first hydraulic cylinders (105) are fixed to the bottom end surface of the upper half of the cover plate (101).

3. The shale gas content detection device according to claim 2, characterized in that: An adjustment assembly (4) is installed in the detection barrel body (1), and the adjustment assembly (4) consists of a mounting seat (401), a second rotating shaft (402), a second sieve plate (403), a second sieve hole (404), a worm wheel (405), a worm (406), a second motor (407) and a turning rake (408). A mounting seat (401) is fixed in the detection barrel body (1), a second rotating shaft (402) is rotated on the mounting seat (401), a second sieve plate (403) is welded to the top end surface of the second rotating shaft (402), the top end surface of the second sieve plate (403) contacts the bottom end surface of the first sieve plate (2), and the second sieve hole (404) is arranged in an array on the second sieve plate (403), and the second sieve hole (404) is the same size as the first sieve hole (201) and is aligned in position. A worm wheel (405) is welded to the second rotating shaft (402), a worm (406) is rotated on the mounting seat (401), the worm (406) is meshed with the worm wheel (405), a second motor (407) is fixed to the mounting seat (401), and an output shaft of the second motor (407) is fixed to the worm (406); A turning rake (408) is welded to the lower portion of the outer wall of the second rotating shaft (402), and the bottom of the turning rake (408) contacts the bottom end surface of the inner wall of the detection barrel (1).

4. The shale gas content detection device according to claim 3, characterized in that: A protective cover (5) made of metal is fixed on the outer wall of the detection barrel (1), a heating tube (6) is arranged inside the protective cover (5), and the heating tube (6) is electrically connected to an external power supply.

5. The shale gas content detection device according to claim 4, characterized in that: A sealing assembly (8) is installed in the detection barrel body (1), and the sealing assembly (8) is composed of a base body (801), a second hydraulic cylinder (802), and a second sealing block (803). A base body (801) is fixed on the inner wall of the detection barrel body (1), and the base body (801) is a concave structure. The second hydraulic cylinder (802) is fixed on the left end surface of the inner wall of the base body (801), and the second sealing block (803) is fixed to the protruding end of the second hydraulic cylinder (802).

6. The device for detecting shale gas content according to claim 5, characterized in that: The second sealing block (803) has a stepped structure, the outer wall of the right half of the second sealing block (803) contacts the inner wall of the exhaust pipe (106), and the right end face of the left half of the second sealing block (803) contacts the left end face of the exhaust pipe (106).

7. The device for detecting shale gas content according to claim 6, characterized in that: A sealing seat (102) with an annular structure is welded on the inner wall of the detection barrel body (1), and the inner side of the sealing seat (102) is inclined; a first sealing block (103) with a frustum-shaped structure is welded on the bottom end surface of the cover plate (101), and when the cover plate (101) is closed, the first sealing block (103) contacts the sealing seat (102).

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