A drying device and a coal sample preparation robot

Abstract

The invention discloses a drying device, and relates to the technical field of coal sample preparation. The drying device comprises a placing piece and a vacuuming component, wherein a receiving chamber is provided in the placing piece, and the coal sample is placed in the receiving chamber, and an opening is provided on the chamber wall on any side of the receiving chamber, and a cover plate is provided on the opening to achieve sealing of the placing piece; the vacuuming component is connected to the receiving chamber to extract the air in the receiving chamber, so that the coal sample is under negative pressure conditions, thereby reducing the boiling point and melting point of the coal sample; the drying device also comprises a liquid inlet component, which is connected to the receiving chamber to input liquid nitrogen into the receiving chamber to achieve freeze drying of the coal sample; or the placing piece comprises an inner shell and an outer shell, the inner shell is arranged in the outer shell, the receiving chamber is arranged in the inner shell, a heating chamber is arranged between the inner shell and the outer shell, and a high-temperature medium is arranged in the heating chamber to achieve heating and drying of the coal sample, and the above arrangement not only improves the drying efficiency of the drying device, but also the two different drying methods improve the applicability of the drying device.

Description

Technical Field

[0001] The invention relates to the technical field of coal sample preparation, and in particular to a drying device and a coal sample preparation robot. Background Art

[0002] Coal sampling requires the coal sample to go through multiple stages of crushing, shrinking, air drying, and fine grinding. The bench-type air drying oven is commonly used to pre-dry the coal sample after shrinking. However, since the coal sampling standard requires that the sample drying temperature cannot be higher than 40°C, the efficiency of using the bench-type air drying oven for drying is low. In addition, the bench-type air drying oven has a single drying method and can only perform heating drying, which has low applicability.

[0003] Therefore, it is urgent to provide a drying device and a coal sample preparation robot to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a drying device which can reduce the melting point and boiling point of a coal sample by vacuuming, and then dry the coal sample by freeze drying and heat drying, thereby improving the drying efficiency and the applicability of the drying device.

[0005] Another object of the present invention is to provide a coal sampling robot that can pass through the above-mentioned drying device to improve the sampling efficiency.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A drying device, comprising:

[0008] A placement piece, wherein a containing cavity is provided in the placement piece, and the coal sample is placed in the containing cavity. An opening is provided on the cavity wall on any side of the containing cavity, and a cover plate is provided on the opening to achieve sealing of the placement piece;

[0009] A vacuum assembly connected to the accommodating chamber to extract air from the accommodating chamber;

[0010] The drying device further comprises a liquid inlet assembly connected to the containing chamber to input liquid nitrogen into the containing chamber to achieve freeze drying of the coal sample; or

[0011] The placement piece includes an inner shell and an outer shell, the inner shell is arranged in the outer shell, the accommodating chamber is arranged in the inner shell, a heating chamber is arranged between the inner shell and the outer shell, and a high-temperature medium is arranged in the heating chamber to achieve heating and drying of the coal sample.

[0012] As an optional solution of the above drying device, it further includes a driving member, the cover plate is arranged at the output end of the driving member, and the driving member can make the cover plate close to the placement member.

[0013] As an optional solution of the above drying device, a sealing gasket is provided between the opening and the cover plate.

[0014] As an optional solution of the above drying device, it also includes a temperature measuring component, which is arranged on the cover plate and connected to the accommodating cavity, so as to measure the temperature in the accommodating cavity.

[0015] As an optional solution of the above-mentioned drying device, the vacuum assembly includes a buffer tank and a first pump member arranged in sequence in a direction away from the placement member, the first pump member is used to extract air from the accommodating chamber; the buffer tank is used to protect the first pump member.

[0016] As an optional solution of the above-mentioned drying device, a plurality of first pump members are provided, and the plurality of first pump members are connected in series.

[0017] As an optional solution of the above-mentioned drying device, the liquid inlet component includes a storage tank and a second pump component which are arranged in sequence along a direction close to the placement member, and liquid nitrogen is stored in the storage tank; the second pump component is used to realize the transportation of the liquid nitrogen from the storage tank to the placement member.

[0018] As an optional solution of the above drying device, it also includes a heating component, and the heating component is connected to the heating chamber to pass the high-temperature medium into the heating chamber.

[0019] As an optional solution of the above drying device, the heating assembly is also provided with a temperature control component to ensure that the temperature of the high-temperature medium does not exceed 40°C.

[0020] A coal sample preparation robot comprises any one of the drying devices described above.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The drying device provided by the present invention extracts the air in the containing chamber through a vacuum assembly, so that the coal sample is under negative pressure conditions, thereby reducing the boiling point and melting point of the coal sample, and freeze-dries the coal sample by introducing liquid nitrogen into the containing chamber through a liquid inlet assembly, or heats and dries the coal sample with a high-temperature medium in a heating chamber. This not only improves the drying efficiency of the drying device, but the two different drying methods also allow the drying device to select a suitable drying method according to the sample preparation conditions, thereby improving the applicability of the drying device.

[0023] The coal sample preparation robot provided by the present invention can shorten the drying time through the above-mentioned drying device, expand the application scenarios of the coal sample preparation robot, and improve the sample preparation efficiency and applicability of the coal sample preparation robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the drying device in the embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Placement components; 2. Vacuuming components; 3. Liquid inlet components; 4. Temperature measuring components; 5. Coal sample;

[0027] 11. Accommodating chamber; 12. Cover plate; 13. Driving member; 14. Sealing gasket; 15. Inner shell; 16. Outer shell; 17. Heating chamber; 171. High-temperature medium;

[0028] 21. Buffer tank; 211. Vacuum pressure gauge; 212. Liquid outlet valve; 22. First pump component; 23. First valve component;

[0029] 31. Storage tank; 32. Second pump component; 33. Second valve component. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] like Figure 1As shown, this embodiment is described in detail. This embodiment provides a drying device, which includes a placement piece 1 and a vacuum assembly 2. The placement piece 1 is provided with a receiving chamber 11, and the coal sample 5 is placed in the receiving chamber 11. An opening is provided on the cavity wall on any side of the receiving chamber 11, and a cover plate 12 is provided on the opening to achieve the sealing of the placement piece 1; the vacuum assembly 2 is connected to the receiving chamber 11 to extract the air in the receiving chamber 11; the drying device also includes a liquid inlet assembly 3, which is connected to the receiving chamber 11 to input liquid nitrogen into the receiving chamber 11 to achieve freeze drying of the coal sample 5; or the placement piece 1 includes an inner shell 15 and an outer shell 16, the inner shell 15 is arranged in the outer shell 16, the receiving chamber 11 is arranged in the inner shell 15, a heating chamber 17 is provided between the inner shell 15 and the outer shell 16, and a high-temperature medium 171 is provided in the heating chamber 17 to achieve heating and drying of the coal sample 5.

[0038] In this embodiment, the air in the accommodating chamber 11 is extracted by the vacuum component 2, so that the coal sample 5 is under negative pressure conditions, thereby reducing the boiling point and melting point of the coal sample 5, and the coal sample 5 is freeze-dried by liquid nitrogen introduced into the accommodating chamber 11 through the liquid inlet component 3, or is heated and dried along with the coal sample 5 by the high-temperature medium 171 provided in the heating chamber 17. Not only the drying efficiency of the drying device is improved, but the two different drying methods also allow the drying device to select a suitable drying method according to the sample preparation conditions, thereby improving the applicability of the drying device.

[0039] Optionally, the drying device further comprises a driving member 13, and the cover plate 12 is arranged at the output end of the driving member 13. The driving member 13 can make the cover plate 12 close to the placement member 1 to ensure that the connection between the accommodating chamber 11 and the cover plate 12 is in a sealed state, thereby improving the vacuuming efficiency of the vacuuming assembly 2. Furthermore, in this embodiment, the driving member 13 is a hydraulic cylinder. Further optionally, a sealing gasket 14 is arranged between the opening and the cover plate 12, thereby further improving the sealing effect of the accommodating chamber 11.

[0040] Optionally, the drying device also includes a temperature measuring component 4, which is arranged on the cover plate 12 and connected to the accommodating chamber 11, so as to measure the temperature inside the accommodating chamber 11, and control the liquid inlet component 3 to adjust the amount of liquid nitrogen delivered to the accommodating chamber 11 according to the obtained temperature, or adjust the temperature of the high-temperature medium 171 in the heating chamber 17 according to the obtained temperature, so as to avoid the temperature exceeding the sample preparation and drying temperature range required by the coal sample preparation standard, which will have an adverse effect on the coal sample 5.

[0041] Specifically, the vacuum assembly 2 includes a buffer tank 21 and a first pump 22 which are sequentially arranged in a direction away from the placement member 1. The first pump 22 is used to extract the air in the accommodating chamber 11 so that the coal sample 5 is under negative pressure, and the boiling point and melting point of the coal sample 5 are reduced to improve the drying efficiency. The buffer tank 21 is used to protect the first pump 22. Further optionally, a vacuum pressure gauge 211 and a liquid outlet valve 212 are provided on the buffer tank 21, and the liquid outlet valve 212 connects the outside with the buffer tank 21. The vacuum pressure gauge 211 is used to detect the vacuum degree in the placement member 1, and whether to continue vacuuming is determined according to whether the obtained vacuum degree meets the requirements of the drying conditions. On the one hand, whether it is freeze drying or heating drying, condensed water will be generated during the drying process. When the condensed water enters the first pump member 22, it will damage the first pump member 22. The setting of the liquid outlet valve 212 on the buffer tank 21 can effectively discharge the condensed water accumulated in the buffer tank 21, thereby protecting the first pump member 22 and extending the service life of the first pump member 22; on the other hand, when the first pump member 22 is vacuuming, some fine coal samples 5 will flow to the first pump member 22 with the air flow. The setting of the buffer tank 21 can make the fine coal samples 5 settle to the bottom of the buffer tank 21, preventing the coal samples 5 from entering the first pump member 22, further protecting the first pump member 22. Further optionally, a first valve member 23 is provided between the first pump member 22 and the buffer tank 21, and the first valve member 23 is used to control the start and pause of vacuuming. Further optionally, a plurality of first pump members 22 are provided, and the plurality of first pump members 22 are connected in series to improve the vacuuming efficiency, so as to achieve the high vacuum degree requirement of the drying device.

[0042] Optionally, the liquid inlet assembly 3 includes a storage tank 31 and a second pump 32 sequentially arranged in a direction close to the placement member 1, and the storage tank 31 stores liquid nitrogen; the second pump 32 is used to realize the delivery of liquid nitrogen from the storage tank 31 to the placement member 1. Further optionally, the second pump 32 is intermittently driven to realize intermittent delivery of liquid nitrogen, saving costs. Further optionally, the liquid inlet assembly 3 also includes a second valve 33, and the second valve 33 is used to control the delivery and suspension of liquid nitrogen.

[0043] Optionally, the drying device further comprises a heating assembly, which is connected to the heating chamber 17 to allow a high temperature medium 171 to pass into the heating chamber 17. Further optionally, a temperature control element is further provided on the heating assembly to ensure that the temperature of the high temperature medium 171 does not exceed 40° C. Further optionally, the high temperature medium 171 is hot water or steam.

[0044] This embodiment also provides a coal sampling robot, including the above-mentioned drying device. The drying device shortens the drying time of the coal sample 5, expands the application scenarios of the coal sampling robot, and thus improves the sampling efficiency and the applicability of the coal sampling robot. Further optionally, the driving member 13, the temperature measuring member 4, the vacuum pressure gauge 211, the first pump member 22, the second pump member 32 and the temperature control member in the above-mentioned drying device are all connected to the control system to realize the integrated automatic control of the coal sampling robot, reduce human intervention, and improve the quality of sampling.

[0045] Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drying device, characterized in that: include: A placement piece (1), wherein a receiving cavity (11) is provided in the placement piece (1), and the coal sample (5) is placed in the receiving cavity (11), and an opening is provided on the cavity wall on any side of the receiving cavity (11), and a cover plate (12) is provided on the opening to achieve sealing of the placement piece (1); A vacuum pumping component (2) connected to the accommodating chamber (11) for extracting air from the accommodating chamber (11); The drying device further comprises a liquid inlet component (3) connected to the containing chamber (11) for inputting liquid nitrogen into the containing chamber (11) to achieve freeze drying of the coal sample (5); or The placement member (1) comprises an inner shell (15) and an outer shell (16); the inner shell (15) is arranged inside the outer shell (16); the accommodating chamber (11) is arranged inside the inner shell (15); a heating chamber (17) is arranged between the inner shell (15) and the outer shell (16); a high-temperature medium (171) is arranged inside the heating chamber (17) to achieve heating and drying of the coal sample (5); The drying device is configured to realize freeze drying of the coal sample (5) or heat drying of the coal sample (5) according to sample preparation conditions; It also comprises a driving member (13), the cover plate (12) is arranged at the output end of the driving member (13), and the driving member (13) can make the cover plate (12) close to the placement member (1); A temperature measuring component (4) is arranged on the cover plate (12) and is connected to the accommodating cavity (11) so as to measure the temperature in the accommodating cavity (11).

2. The drying device according to claim 1, characterized in that: A sealing gasket (14) is provided between the opening and the cover plate (12).

3. The drying device according to claim 1, characterized in that: The vacuum pumping assembly (2) comprises a buffer tank (21) and a first pump component (22) which are arranged in sequence in a direction away from the placement component (1); the first pump component (22) is used to extract air from the accommodating cavity (11); and the buffer tank (21) is used to protect the first pump component (22).

4. The drying device according to claim 3, characterized in that: A plurality of the first pump members (22) are provided, and the plurality of the first pump members (22) are connected in series.

5. The drying device according to claim 1, characterized in that: The liquid inlet assembly (3) comprises a storage tank (31) and a second pump (32) which are arranged in sequence in a direction close to the placement member (1); liquid nitrogen is stored in the storage tank (31); and the second pump (32) is used to transport the liquid nitrogen from the storage tank (31) to the placement member (1).

6. The drying device according to claim 1, characterized in that: It also comprises a heating component, which is connected to the heating chamber (17) so as to allow the high-temperature medium (171) to flow into the heating chamber (17).

7. The drying device according to claim 6, characterized in that: The heating assembly is also provided with a temperature control component to ensure that the temperature of the high-temperature medium (171) does not exceed 40°C.

8. A coal sample preparation robot, characterized in that: The drying device comprises the drying device according to any one of claims 1 to 7.

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