Coal sample storage container

Abstract

A coal sample storage container includes an outer barrel, an outer cover, a coal bucket, a coal bucket lid, and a buffer tank. The outer barrel has a nitrogen inlet pipe at its bottom, with a switch valve connected to a nitrogen filling device and a distributor connecting to the inner bottom and upper gas supply pipes of the outer barrel. The outer cover is a sleeve-type component that can cover the upper opening of the outer barrel and has an exhaust pipe connected to a thermometer and hygrometer. The exhaust pipe has a one-way exhaust valve connected to a nitrogen concentration detector. The coal bucket stores coal samples, and the coal bucket lid covers the upper opening of the coal bucket and has an exhaust hole and a nitrogen inlet pipe. The buffer tank is located between the outer barrel and the coal bucket to buffer the temperature and pressure differences between them. This invention overcomes the shortcomings of existing technologies, creating a sealed, oxygen-free environment for coal sample storage, effectively reducing nitrogen leakage, displaying temperature and humidity information of the coal sample in real time, extending its storage time, facilitating unified management, and ensuring the impartiality and authority of testing.

Description

Technical Field

[0001] This utility model relates to a storage device, and more particularly to a coal sample storage device for storing coal samples in a constant temperature and humidity storage environment, belonging to the field of manufacturing technology of laboratory sample storage devices. Background Technology

[0002] In coal quality inspection and trade practices, the preservation of coal samples is of paramount importance. According to the explicit provisions of GB / T 474-2008 "Methods for Preparing Coal Samples," coal samples must be preserved for at least two months for use in subsequent verification and dispute resolution processes. This allows buyers and sellers to re-examine the coal samples from a third-party inspection agency when disputes arise regarding the inspection results at the port of loading and unloading, thus establishing a scientific basis for consensus.

[0003] Third-party testing agencies play the role of impartial judges in the coal trade chain. The quality of the coal samples they preserve directly affects the vital interests of both trading parties. Therefore, the stability of coal sample preservation has become crucial for testing. However, coal, as a relatively chemically reactive solid mineral, undergoes a series of complex physical changes and chemical reactions upon contact with air, leading to significant changes in its key quality indicators. In particular, when exposed to the air, coal samples undergo oxidation with oxygen, generating heat and altering their chemical composition. They also absorb moisture from the air, causing hygroscopic agglomeration. These changes not only affect the physical morphology of the coal sample but, more seriously, alter key testing indicators such as calorific value, volatility, and hydrogen content, rendering retesting results incomparable and unjust.

[0004] Currently, most third-party testing agencies still use traditional storage methods and equipment, including ordinary sealed containers and simple packaging bags. While these methods and equipment are simple to operate and inexpensive, they have significant technical drawbacks. In practical applications, these traditional methods and equipment are unable to effectively prevent air from contacting the coal sample, leading to frequent oxidation, deterioration, and moisture absorption / caking.

[0005] Ordinary sealed containers are typically made of plastic or glass, relying on a simple lid structure for sealing. However, these containers have limited sealing performance and cannot completely prevent air penetration, especially during long-term storage, where oxygen and moisture will slowly seep into the container. Secondly, the residual air inside these containers contains a large amount of oxygen, which will react with the coal sample to cause oxidation. Finally, ordinary containers lack atmosphere control functions and cannot create an inert environment suitable for coal sample preservation.

[0006] Simple packaging bags (such as plastic or woven bags) offer even worse protection, providing almost no effective protection. These bags are permeable, allowing oxygen and water vapor to pass freely, thus accelerating the metamorphic process of the coal sample. At the same time, the bags are susceptible to mechanical damage, developing micropores or cracks, further reducing their protective performance. Studies have shown that coal samples stored in ordinary packaging bags begin to exhibit changes in their physicochemical properties after 24 hours, severely impacting the reliability of the coal samples as analytical test specimens.

[0007] In response to the shortcomings of traditional storage methods and equipment, those skilled in the art have made a series of improvement attempts, such as the utility model patent "Manufacturing Method of Vacuum Nitrogen-Filled Coal Sample Storage Cabinet". This method utilizes a sealable storage cabinet door, a closed storage chamber, pressure indicators, vacuum nozzles, and nitrogen filling nozzles. A vacuum pump is used to evacuate the inside of the storage cabinet to a vacuum state, and then nitrogen is filled in as a protective gas, creating a coal sample storage device isolated from oxygen. This provides a relatively reliable inert environment, ensuring that the physicochemical properties of the coal sample remain unchanged over a long period. The equipment is relatively simple and easy to operate, and can be widely used in coal, metallurgy, geology, chemical, and other fields where coal is used for testing. However, this type of storage cabinet also has significant limitations: First, each opening requires re-vacuuming and nitrogen filling, which is cumbersome and energy-intensive; second, the equipment capacity is fixed, making it difficult to adapt to different scales of storage needs; finally, the equipment requires extremely high sealing performance, and the aging of the sealing material after long-term use will affect the overall performance.

[0008] Of course, more advanced sample storage devices have emerged in recent years, such as the utility model patent "A Sample Storage Device" (application number: CN202222978658.2), which includes a storage shell, a storage mechanism, and a sealing mechanism. The sealing mechanism includes a sealing cover, a sealing fixing cover, a fixing pin, and a gas exhaust component, which can achieve a sealed device and a nitrogen storage environment, extending the storage time. Its technological advancements are mainly reflected in the following aspects: First, it integrates a gas exhaust component, including a nitrogen tank, a vent pipe, and a gas pump, which can automatically complete the venting and nitrogen filling process; second, it adds a weighing function, with a built-in electronic platform scale and electronic weighing scale, which can determine the mass of coal samples and accurately weigh them, avoiding atmosphere damage during the transfer process; third, it introduces a temperature control component, including a cooling pipe and a temperature sensor, which can control the cooling pipe through the temperature sensor when the temperature rises, achieving the effect of stabilizing the storage environment temperature. However, such devices still have shortcomings. First, they consume a large amount of nitrogen, resulting in high operating costs. Second, the storage capacity is limited, making them unsuitable for preserving large quantities of samples. Finally, the stability of the system depends on the coordinated operation of multiple components, and the failure of any component may affect the overall preservation effect.

[0009] In other large coal storage facilities, the application of nitrogen protection technology is more mature. For example, the utility model patent "Manufacturing Method of Nitrogen Protection Device for Coal Storage Silos" provides a device that includes an air filling pipe pre-embedded in the coal storage silo and opening on the outside of the silo, and a device connected to a protective cover placed inside the silo. This device allows nitrogen to enter the protective cover through the air filling pipe, and then enter the silo to replace toxic and harmful gases and oxygen, avoiding spontaneous combustion of harmful gases and deformation or blockage of the air filling pipe.

[0010] Another utility model patent, "Safety Protection Device for Upgraded Lignite Storage" (application number: CN200920245675.7), consists of a nitrogen cylinder, a pressure gauge, a pressure reducer, a manifold, and nozzles. The manifold is located at the bottom of the finished coal storage silo and is connected to the micro-pressure pressure reducer. Several nitrogen filling nozzles are evenly distributed on the circumference of the manifold along its upper edge. This design, which fills the coal storage silo with micro-pressure nitrogen from the bottom of the finished coal storage silo, ensures the safety of long-term storage of upgraded lignite.

[0011] Recent technological advancements are also reflected in nitrogen distribution efficiency and recycling. For example, the utility model patent "A Nitrogen Protection Device for Coal Storage Silos" (application number: CN202020733596.7), published in 2021, adopts a top nitrogen input structure and a bottom nitrogen output structure. That is, nitrogen is dispersed and discharged through top branch pipes, so that gas exchange can be achieved even in the corners inside the coal storage silo. At the same time, the device is also equipped with a gas recycling structure, which can realize the recycling of nitrogen and save energy.

[0012] Despite significant progress in nitrogen protection technology for coal sample preservation, existing technologies still face challenges because:

[0013] The first issue is how to maintain the stability of the nitrogen environment during long-term storage. Due to limitations in equipment sealing and material permeability, the nitrogen concentration will gradually decrease over time, requiring regular replenishment of nitrogen. This not only increases operating costs but also introduces uncertainty into coal sample preservation.

[0014] Secondly, temperature fluctuations affect the preservation effect. Temperature changes can cause changes in the internal pressure of the equipment, which may damage the seal and accelerate the infiltration of external air. Although some advanced devices are equipped with temperature control components, including cooling pipes and temperature sensors, which can control the cooling pipes through temperature sensors when the temperature rises to achieve the effect of stabilizing the storage environment temperature, these systems have high energy consumption and require regular maintenance.

[0015] The third issue is the cost-benefit balance; existing professional coal sample storage equipment is expensive, complex to operate, and has high operating costs, which puts economic pressure on third-party testing agencies that need to process large numbers of samples, especially when coal trade volume fluctuates greatly.

[0016] Finally, there is the issue of standardization and applicability. Currently, the specifications of coal sample storage equipment on the market vary, and the operating procedures differ significantly. There is a lack of unified technical standards and evaluation systems, making it difficult for users to choose suitable equipment and hindering the standardized development of industry technology. Utility Model Content

[0017] To overcome the shortcomings of existing technologies, this utility model provides a novel coal sample storage device to reduce nitrogen leakage, effectively extend the storage time of coal samples, reduce equipment production and operating costs, improve its economic efficiency, ease of operation and maintenance, and make it more suitable for the testing requirements of third-party testing institutions. The technical solution is as follows:

[0018] A coal sample storage container, stored in a constant temperature and humidity environment, is used for storing coal samples. It includes an outer drum, an outer cover, a coal drum, a coal drum lid, and a buffer drum, wherein:

[0019] The outer barrel has a nitrogen inlet pipe at its bottom. The nitrogen inlet pipe has a switch valve on the outside of the outer barrel. The nitrogen inlet pipe has a distributor inside the outer barrel. The distributor is connected to the inner bottom gas supply pipe at the bottom of the outer barrel and the upper gas supply pipe along the inner wall of the outer barrel.

[0020] The outer cover is a sleeve-type component that can fit over and seal the upper opening of the outer barrel. The outer cover is also provided with a thermometer and hygrometer interface and an exhaust pipe on its cylindrical wall. The thermometer and hygrometer interface is used to connect an external thermometer and hygrometer to detect the temperature and humidity inside the outer barrel. The exhaust pipe is provided with a one-way exhaust valve.

[0021] The coal bucket is used to store the coal sample. The coal bucket lid can cover the upper opening of the coal bucket. The coal bucket lid is also provided with an exhaust hole and a nitrogen inlet pipe. The exhaust hole is used to discharge the gas inside the coal bucket and allow it to enter the outer cover. The nitrogen inlet pipe is used to connect to the upper gas supply pipe.

[0022] The buffer bucket is disposed between the outer bucket and the coal bucket to buffer the temperature and pressure difference between the outer bucket and the coal bucket and to catch coal dust from the coal sample that leaks out of the coal bucket.

[0023] Furthermore, the upper opening of the outer barrel is sealed to the cylinder wall of the outer cover through a mutually cooperating connecting mechanism.

[0024] Optional:

[0025] The connecting mechanism consists of an external thread on the upper opening of the outer barrel and an internal thread on the inner wall of the outer cover that mates with the external thread, and a sealing gasket is also provided on the upper opening of the outer barrel; or

[0026] The connecting mechanism consists of a lock head located on the outside of the upper opening of the outer tub and a latch located on the outside of the outer cover wall that can engage with the lock head for locking. An O-ring is also provided on the outside of the upper opening of the outer tub.

[0027] Furthermore, the outer tub is provided with at least one handle on its outer wall, and a base is provided at the bottom of the outer tub.

[0028] Optionally, the coal bucket is provided with a handle on the outside of its upper opening. The handle is an inverted J-shaped component, and the bent part of the inverted J-shaped handle can rest on the edge of the opening of the buffer bucket.

[0029] Optionally, the buffer tank may also have through holes on its wall or the upper part of its wall may be composed of a screen.

[0030] Optionally, the buffer bucket is provided with a buffer handle on the outer side of its upper opening. The buffer handle is an inverted J-shaped component. The protruding part of the J-shaped component can rest on the edge of the opening of the outer bucket, while its vertical part acts as a positioning element and cooperates with the groove provided on the inner wall of the outer bucket for positioning.

[0031] Furthermore, the coal sample storage device also includes a nitrogen filling device, which includes a nitrogen source and a dryer. The nitrogen source is connected to the lower part of the dryer, and the upper part of the dryer is connected to the switch valve.

[0032] Optional:

[0033] The nitrogen source is a compressed nitrogen cylinder / compressed nitrogen package; or

[0034] The nitrogen source consists of a compressed nitrogen capsule and a compressed nitrogen capsule tube. When the compressed nitrogen capsule is placed inside the compressed nitrogen capsule tube, the compressed nitrogen capsule tube is connected to the upper part of the dryer. Then, the compressed nitrogen capsule tube is rotated to cause the compressed nitrogen capsule to be crushed under pressure, releasing the high-pressure nitrogen gas inside.

[0035] Furthermore, the coal sample storage device also includes a nitrogen concentration detector, which is connected to the one-way exhaust valve and is used to detect the nitrogen concentration inside the outer container.

[0036] Compared with the prior art, the beneficial effects and advancements of this utility model are as follows:

[0037] This invention provides a novel coal sample storage device comprising an outer barrel, an outer cover, a coal barrel, a coal barrel lid, and a buffer barrel. The outer barrel has a nitrogen inlet pipe at its bottom, equipped with a switch valve and a distributor. The switch valve connects to a nitrogen filling device, and the distributor connects to an inner bottom gas supply pipe located at the bottom of the outer barrel and an upper gas supply pipe running along the inner wall of the outer barrel. The outer cover is a sleeve-type component that can cover the upper opening of the outer barrel. The outer cover also has a thermometer / hygrometer interface and an exhaust pipe on its cylindrical wall. The thermometer / hygrometer interface is used to connect an external thermometer / hygrometer. The thermometer and hygrometer are used to detect the temperature and humidity inside the outer barrel. A one-way exhaust valve is installed on the exhaust pipe to connect to a nitrogen concentration detector. The coal barrel is used to store coal samples. The coal barrel lid covers the upper opening of the coal barrel and is also equipped with an exhaust hole and a nitrogen inlet pipe. The exhaust hole is used to discharge the gas inside the coal barrel and allow it to enter the outer lid. The nitrogen inlet pipe is used to connect to the upper gas supply pipe. The buffer barrel is set between the outer barrel and the coal barrel to buffer the temperature and pressure difference between the outer barrel and the coal barrel and to catch coal dust leaking from the coal barrel.

[0038] It can be seen that this utility model overcomes the shortcomings of the prior art. It not only creates a closed oxygen-free environment for coal sample storage, but also, because the coal sample storage device is small in size, one sample uses one storage device. Therefore, it can effectively reduce nitrogen leakage and extend the storage time of coal samples.

[0039] Furthermore, since multiple coal sample storage containers can be centrally managed and stored together in a constant temperature and humidity storage environment that meets the requirements for coal sample storage, they are not only convenient to use and maintain, effectively reducing the production and operating costs of the equipment and improving its economic efficiency, ease of operation, and simplicity of maintenance, but also facilitate unified management, implementation of standardized technical standards and evaluation systems, and suitability for the testing requirements of third-party testing institutions, ensuring the impartiality and authority of sample testing. Compared with existing technologies, these methods have substantial features and significant progress, and therefore have great value for promotion and application. Attached Figure Description

[0040] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0041] Obviously, the accompanying drawings described below are only some of the drawings of the present utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort, but these other drawings are also drawings required for the embodiments of the present utility model.

[0042] Figure 1A three-dimensional structural diagram of a coal sample storage device provided for an embodiment of this utility model;

[0043] Figure 2 A cross-sectional view of a coal sample storage device provided in an embodiment of this utility model;

[0044] Figure 3 A three-dimensional schematic diagram of the exploded structure of a coal sample storage device provided in an embodiment of this utility model;

[0045] Figure 4 A cross-sectional view of the outer barrel of a coal sample storage container provided in an embodiment of this utility model;

[0046] Figure 5 A cross-sectional view of a coal sample storage buffer tank provided in this embodiment of the present invention;

[0047] Figure 6 A three-dimensional structural diagram of a coal sample storage device including a nitrogen concentration detector and a nitrogen filling device is provided for an embodiment of this utility model;

[0048] Figure 7 A partial cross-sectional view of a coal sample storage device including a nitrogen concentration detector and a nitrogen filling device, provided as an embodiment of this utility model.

[0049] In the picture:

[0050] 100-Coal sample;

[0051] 10-Outer barrel, 11-Nitrogen inlet pipe, 12-Switch valve, 13-Distributor, 14-Inner bottom gas supply pipe, 15-Upper gas supply pipe, 16-Sealing gasket, 17-O-ring seal, 18-Handle, 19-Base;

[0052] 20-Outer cover, 21-Thermohygrometer interface, 22-Exhaust pipe, 23-Thermohygrometer, 24-One-way exhaust valve;

[0053] 30 - Coal bucket; 31 - Coal bucket handle;

[0054] 40-Coal bucket cover, 41-Exhaust vent, 42-Nitrogen inlet pipe, 43-Connecting pipe;

[0055] 50 - Buffer bucket, 51 - Buffer handle;

[0056] 61-Dryer, 62-Compressed nitrogen capsule, 63-Compressed nitrogen capsule tube;

[0057] 70-Nitrogen concentration detector. Detailed Implementation

[0058] To make the objectives, technical solutions, beneficial effects, and significant advancements of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings provided for the embodiments of this utility model. Obviously, all the described embodiments are only some, not all, of the embodiments of this utility model, and based on the embodiments of this utility model, those skilled in the art can obtain more other embodiments without creative effort, but these possible embodiments all fall within the protection scope of this utility model.

[0059] It should be noted that:

[0060] The term "comprising" and any variations thereof in the specification and claims of this utility model are intended to cover a non-exclusive inclusion, that is, including not only a series of listed technical features and structural components, but also optionally technical features and structural components not listed, or optionally the connection relationships between such technical features and structural components.

[0061] What needs to be understood is:

[0062] In the description of the embodiments of this utility model, the terms "upper", "lower", "top", "bottom" and other indicative directional or positional terms are used only based on the directional or positional relationships shown in the accompanying drawings of the embodiments of this utility model. They are used to facilitate the description of the embodiments of this utility model and to simplify the explanation, and are not intended to indicate or imply that the device or element must have a specific orientation, specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed setting or connection, a detachable setting or connection, a movable connection, or an integral connection; that is, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two structural elements or the interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] It should also be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0065] The technical solution of this utility model will now be described in detail with reference to specific embodiments.

[0066] Example

[0067] like Figure 1A three-dimensional structural diagram of a coal sample storage device provided for an embodiment of this utility model. Figure 2 A cross-sectional structural diagram of a coal sample storage device provided in an embodiment of this utility model. Figure 3 A three-dimensional schematic diagram of the exploded structure of a coal sample storage device provided in this embodiment of the present invention. Figure 4 As shown in the cross-sectional structural diagram of the outer barrel of a coal sample storage container provided in this embodiment, the coal sample storage container provided in this embodiment, which is used to store coal samples in a constant temperature and humidity storage environment, includes:

[0068] Outer bucket 10, outer cover 20, coal bucket 30, coal bucket cover 40, and buffer bucket 50, wherein:

[0069] The outer barrel 10 is provided with a nitrogen inlet pipe 11 at its bottom. The nitrogen inlet pipe 11 is provided with a switch valve 12 on the outside of the outer barrel 10. The nitrogen inlet pipe 11 is provided with a distributor 13 inside the outer barrel 10. The distributor 13 is connected to the inner bottom gas supply pipe 14 provided at the bottom of the outer barrel 10 and the upper gas supply pipe 15 provided along the inner wall of the outer barrel 10.

[0070] The outer cover 20 is a sleeve-type component that can be fitted onto the upper opening of the outer barrel 10. The outer cover 20 is also provided with a thermometer and hygrometer interface 21 and an exhaust pipe 22 on its cylindrical wall. The thermometer and hygrometer interface 21 is used to connect an external thermometer and hygrometer 23. The thermometer and hygrometer 23 is used to detect the temperature and humidity inside the outer barrel 10. The exhaust pipe 22 is provided with a one-way exhaust valve 24.

[0071] The coal bucket 30 is used to store coal sample 100. The coal bucket lid 40 can cover the upper opening of the coal bucket 30. The coal bucket lid 40 is also provided with an exhaust hole 41 and a nitrogen inlet pipe 42. The exhaust hole 41 is used to discharge the gas inside the coal bucket 30 and let it enter the outer cover 20. The nitrogen inlet pipe 42 is used to connect to the upper gas supply pipe 15.

[0072] The buffer tank 50 is set between the outer tank 10 and the coal bucket 30 to buffer the temperature and pressure difference between the outer tank 10 and the coal bucket 30 and to receive the coal dust of the coal sample 100 that leaks out of the coal bucket 30.

[0073] As can be seen from the above description, this embodiment constructs a novel coal sample storage device using an outer bucket, an outer cover, a coal bucket, a coal bucket lid, and a buffer bucket, wherein:

[0074] The nitrogen inlet pipe at the bottom of the outer barrel is equipped with a switch valve and a distributor. The switch valve is used to connect to the nitrogen filling device, and the distributor is connected to the inner bottom gas supply pipe and the upper gas supply pipe of the outer barrel. When the switch valve is opened, nitrogen can be quickly entered through the nitrogen filling device and the distributor and evenly distributed throughout the entire internal space of the outer barrel. When the switch valve is closed, the oxygen-free environment inside the outer barrel can be effectively maintained, thereby effectively protecting the coal samples stored therein.

[0075] The outer cover is a sleeve-type component that can be fitted onto the upper opening of the outer barrel to effectively seal the outer barrel and ensure an oxygen-free environment inside the outer barrel.

[0076] Furthermore, since the outer cover is equipped with a thermometer and hygrometer interface and an exhaust pipe, the thermometer and hygrometer interface is connected to an external thermometer and hygrometer, so that the temperature and humidity inside the outer tank can be detected at any time, allowing managers to keep track of the temperature and humidity environment inside the outer tank at any time.

[0077] The exhaust pipe is equipped with a one-way exhaust valve, which can be used to connect to a nitrogen concentration detector, thereby ensuring the nitrogen concentration inside the outer barrel and providing effective oxygen-free protection for the coal sample.

[0078] The coal bucket is used to store coal samples. The lid of the coal bucket covers the upper opening of the coal bucket, and the lid is also equipped with an exhaust hole and a nitrogen inlet pipe. The exhaust hole is used to discharge the gas inside the coal bucket and allow it to enter the outer lid. The nitrogen inlet pipe is used to connect to the upper gas supply pipe. A buffer tank is set between the outer bucket and the coal bucket to buffer the temperature and pressure difference between the outer bucket and the coal bucket and to catch coal dust that leaks from the coal bucket.

[0079] As can be seen, the coal sample storage device provided in this embodiment overcomes the shortcomings of the prior art. It not only creates a sealed, oxygen-free environment for coal sample storage, but also, due to the small size of the coal sample storage device, one sample uses one storage device, thus effectively reducing nitrogen leakage and extending the storage time of the coal sample. In addition, since multiple coal sample storage devices can be centrally managed and stored together in a constant temperature and humidity storage environment that meets the requirements for coal sample storage, it is not only convenient to use and maintain, effectively reducing the production and operating costs of the equipment and improving its economy, ease of operation, and simplicity of maintenance, but also facilitates unified management, implements standardized technical standards and evaluation systems, and is suitable for the testing requirements of third-party testing institutions, ensuring the impartiality and authority of sample testing.

[0080] It should be noted that:

[0081] Because coal sample storage units can be centrally managed and stored together in a constant temperature and humidity storage environment that meets the requirements for coal sample storage, the structure of the coal sample storage unit itself can be very simple. This is because the complex structure and high production and operating costs of the constant temperature and humidity generation equipment and the maintenance costs can be centrally managed and maintained in the constant temperature and humidity storage environment. Just like how mobile phones now store complex calculations and massive amounts of information in the cloud, thereby simplifying the structure of the mobile phone itself, reducing its storage space, and thus reducing the production and operating costs of the mobile phone, the coal sample storage unit itself only needs to maintain the local oxygen-free environment in which the coal sample is located. This simplifies the structure of the coal sample storage unit and its operation and maintenance methods, thereby reducing its use and maintenance costs, while achieving excellent coal sample preservation results.

[0082] Furthermore, in this embodiment, the upper opening of the outer barrel 10 of the coal sample storage device is sealed to the cylinder wall of the outer cover 20 through a mutually cooperating connecting mechanism.

[0083] Optional:

[0084] The aforementioned connecting mechanism consists of an external thread (not shown in the figure) on the upper opening of the outer barrel 10 and an internal thread (not shown in the figure) on the cylindrical wall of the outer cover 20 that mates with the external thread (not shown in the figure). The upper opening of the outer barrel 10 also has... Figure 4 The sealing gasket 16 shown; or

[0085] The aforementioned connecting mechanism consists of a lock (not shown in the figure) located on the outer side of the upper opening of the outer tub 10 and a latch (not shown in the figure) located on the outer side of the outer cover 20, which can engage with the lock (not shown in the figure) for locking. Furthermore, the outer side of the upper opening of the outer tub 10 is also provided with... Figure 3 The O-ring 17 shown is shown.

[0086] Obviously, by setting a gasket or O-ring, a better sealing effect can be achieved through the connecting mechanism.

[0087] Furthermore, such as Figure 3 or Figure 4 As shown, in the above-mentioned coal sample storage device, at least one handle 18 is provided on the outer wall of the outer barrel 10, and a base 19 is provided at the bottom of the outer barrel 10.

[0088] Obviously, the outer bucket with handles is easier to carry and move, while the outer bucket with a base is more stable and safer to place.

[0089] Optional, such as Figure 3As shown, in the above-mentioned coal sample storage device, a coal bucket handle 31 is also provided on the outer side of the upper opening of the coal bucket 30. The coal bucket handle 31 is an inverted J-shaped component, and the bent part of the inverted J-shaped coal bucket handle 31 can rest on the edge of the opening of the buffer bucket 50, thereby providing a method for placing and taking out the coal bucket.

[0090] Optionally, in the aforementioned coal sample storage device, the buffer tank 50 has a through hole (not shown in the figure) on its wall, or the upper part of its wall is as follows: Figure 5 The cross-sectional view of a coal sample storage buffer tank provided in this embodiment of the present invention is shown, which is composed of a sieve.

[0091] Optional, such as Figure 5 As shown, the buffer bucket 50 is provided with a buffer handle 51 on the outer side of its upper opening. The buffer handle 51 is an inverted J-shaped component. The bent part of the J-shaped component can rest on the edge of the opening of the outer bucket 10, while its vertical part acts as a positioning component and cooperates with the groove (not shown in the figure) provided on the inner wall of the outer bucket 10 for positioning.

[0092] Furthermore, such as Figure 6 A three-dimensional structural diagram of a coal sample storage device including a nitrogen concentration detector and a nitrogen filling device is provided for embodiments of this utility model. Figure 7 A partial cross-sectional view of another coal sample storage device including a nitrogen concentration detector and a nitrogen filling device, provided as an embodiment of this utility model, is shown below:

[0093] The coal sample storage device provided in this embodiment also includes a nitrogen filling device, which includes a nitrogen source and a dryer 61. The nitrogen source is connected to the lower part of the dryer 61, and the upper part of the dryer 61 is connected to the switch valve 12.

[0094] Optional:

[0095] The nitrogen source is a compressed nitrogen cylinder (not shown in the figure) / a compressed nitrogen package (not shown in the figure); or

[0096] The nitrogen source consists of a compressed nitrogen capsule 62 and a compressed nitrogen capsule tube 63. When the compressed nitrogen capsule 62 is placed inside the compressed nitrogen capsule tube 63, and the compressed nitrogen capsule tube 63 is connected to the upper part of the dryer 61, the compressed nitrogen capsule tube 63 is rotated to cause the compressed nitrogen capsule 62 to be crushed under pressure, releasing the high-pressure nitrogen gas inside.

[0097] Furthermore, such as Figure 6 and Figure 7 As shown:

[0098] This embodiment of the coal sample storage device also includes a nitrogen concentration detector 70, which is connected to a one-way exhaust valve 24 and is used to detect the nitrogen concentration inside the outer barrel 10.

[0099] It can be seen that:

[0100] The coal sample storage device provided in this embodiment is simple, practical, easy to operate, and easy to learn. Operators do not need special training to complete the relevant operations. Compared with existing storage devices or storage devices with nitrogen protection environment, it is not only simple to operate and saves time and effort, but also can achieve standardized and regulated management. It is easy to establish standardized operating procedures, meet the testing requirements of third-party testing institutions, and ensure the impartiality and authority of the testing.

[0101] To better understand the technical solution of the coal sample storage device provided in this embodiment, the following describes a method of using the coal sample storage device to illustrate the technical solution given in the above embodiment, that is, how to effectively protect coal samples using the coal sample storage device provided in this embodiment.

[0102] Please note that the following usage instructions are primarily for... Figure 6 and Figure 7 The coal sample storage container shown is as follows:

[0103] The coal sample storage container includes an outer barrel 10, an outer cover 20, a coal barrel 30, a coal barrel cover 40, a buffer tank 50, a nitrogen concentration detector 70, and a nitrogen filling device with a nitrogen source and a dryer 61, wherein:

[0104] The outer barrel 10 is provided with a nitrogen inlet pipe 11 at its bottom. The nitrogen inlet pipe 11 is provided with a switch valve 12 on the outer side of the outer barrel 10. The nitrogen inlet pipe 11 is provided with a distributor 13 inside the outer barrel 10. The distributor 13 is connected to the inner bottom gas supply pipe 14 provided at the bottom of the outer barrel 10 and the upper gas supply pipe 15 provided along the inner wall of the outer barrel 10.

[0105] The outer cover 20 is a sleeve-type component. The outer cover 20 has a thermometer and hygrometer interface 21 and an exhaust pipe 22 on its cylindrical wall. The thermometer and hygrometer interface 21 is connected to a thermometer and hygrometer 23. The exhaust pipe 22 is equipped with a one-way exhaust valve 24.

[0106] The coal bucket cover 40 is provided with an exhaust hole 41 for discharging the gas inside the coal bucket 30 and a nitrogen inlet pipe 42 connected to the upper gas supply pipe 15.

[0107] The buffer tank 50 is positioned between the outer tank 10 and the coal tank 30.

[0108] Reference Figure 6 and Figure 7 The above-mentioned coal sample storage device is used in accordance with the following operating steps:

[0109] Place the coal sample 100 into the coal bucket 30, then place the coal bucket 30 into the buffer bucket 50, and then place the buffer bucket 50 containing the coal bucket 30 into the outer bucket 10. Then cover the coal bucket 30 with the coal bucket lid 40. Connect the nitrogen inlet pipe 42 on the coal bucket lid 40 to the upper gas supply pipe 15 inside the outer bucket 10 with the connecting pipe 43. Then place the outer cover 20 on the upper opening of the outer bucket 10 to seal the upper opening.

[0110] Connect the upper part of the dryer 61 of the nitrogen filling device to the switch valve 12 at the bottom of the outer barrel 10, connect the nitrogen source to the lower part of the dryer 61, and connect the one-way exhaust valve 24 on the outer cover 20 to the nitrogen concentration detector 70.

[0111] Open the switch valve 12 and the one-way exhaust valve 24 to release the nitrogen in the nitrogen source. At the same time, monitor the nitrogen content of the gas discharged from the outer barrel 10 through the nitrogen concentration detector 70. When the nitrogen content meets the storage requirements of the coal sample 100, first close the switch valve 12 and then close the one-way exhaust valve 24.

[0112] Disconnect the switch valve 12 from the nitrogen filling device and the one-way exhaust valve 24 from the nitrogen concentration detector 70. Then, place the coal sample storage container, after disconnecting the nitrogen filling device and the nitrogen concentration detector 70, in a constant temperature and humidity storage environment that meets the requirements for coal sample storage. This completes the coal sample storage operation of the coal sample storage container and allows the temperature and humidity inside the outer container 10 to be monitored at any time by the temperature and humidity meter 23.

[0113] When coal sample 100 is needed, first remove the coal sample storage container (with the nitrogen filling device and nitrogen concentration detector 70 removed) from the constant temperature and humidity storage environment and move it to the testing site. Release the seal between the outer cover 20 and the upper opening of the outer drum 10 and remove the outer cover 20. Then disconnect the nitrogen inlet pipe 42 from the upper gas supply pipe 15 of the outer drum 10. Remove the buffer tank 50 together with the coal drum 30 and its coal drum cover 40 from the outer drum 10. Then remove the coal drum 30 and its coal drum cover 40 together from the buffer tank 50. Open the coal drum cover 40, and the required coal sample 100 can be taken out from the coal drum 30 for testing, thus completing a complete use process of the coal sample storage container.

[0114] It can be seen that:

[0115] The coal sample storage device provided in this embodiment is simple and practical to use, easy to operate and learn. Operators can complete the relevant operations without special training. Compared with existing storage devices or storage devices with nitrogen protection environment, it is not only simple to operate and saves time and effort, but also can achieve standardized and regulated management, making it easy to establish standardized operating procedures, meet the testing requirements of third-party testing institutions, and ensure the impartiality and authority of the testing.

[0116] In conclusion, it can be seen that:

[0117] This invention constructs a novel coal sample storage device using an outer bucket, outer cover, coal bucket, coal bucket lid, and buffer bucket, overcoming the shortcomings of existing technologies. It not only creates a sealed, oxygen-free environment for coal sample storage, but also, due to its small size, allows one storage device per coal sample, effectively reducing nitrogen leakage and extending sample preservation time. Multiple coal sample storage devices can be stored together in a constant temperature and humidity storage environment that meets coal sample storage requirements. This not only facilitates use and maintenance, but also effectively reduces equipment production and operating costs, improving its economic efficiency, ease of operation, and maintenance. It also facilitates unified management, adheres to standardized technical standards and evaluation systems, and meets the testing requirements of third-party testing institutions, ensuring the impartiality and authority of sample testing. Compared to existing technologies, it possesses substantial features and significant progress, thus having great potential for promotion and application.

[0118] In the description process of the above instruction manual:

[0119] The terms "this embodiment," "this utility model embodiment," "as shown," "further," etc., refer to specific features, structures, materials, or characteristics described in the embodiment that are included in at least one embodiment of the present utility model. In this specification, the illustrative expressions of the above terms are not necessarily directed at the same embodiment. Moreover, the specific features, structures, materials, or characteristics described can be combined or combined in a suitable manner in any one or more embodiments. Furthermore, without creating contradictions, those skilled in the art can combine or combine the different embodiments and features of the different embodiments described in this specification.

[0120] Finally, it should be noted that:

[0121] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions described in the embodiments of this utility model. Non-essential improvements, adjustments or substitutions made by those skilled in the art based on the contents described in this specification are all within the scope of protection claimed by this utility model.

Claims

1. A coal sample storage device, stored in a constant temperature and humidity environment, for storing coal samples, characterized in that: Includes an outer drum, an outer lid, a coal drum, a coal drum lid, and a buffer drum, among which: The outer barrel has a nitrogen inlet pipe at its bottom. The nitrogen inlet pipe has a switch valve on the outside of the outer barrel. The nitrogen inlet pipe has a distributor inside the outer barrel. The distributor is connected to the inner bottom gas supply pipe at the bottom of the outer barrel and the upper gas supply pipe along the inner wall of the outer barrel. The outer cover is a sleeve-type component that can fit over and seal the upper opening of the outer barrel. The outer cover is also provided with a thermometer and hygrometer interface and an exhaust pipe on its cylindrical wall. The thermometer and hygrometer interface is used to connect an external thermometer and hygrometer to detect the temperature and humidity inside the outer barrel. The exhaust pipe is provided with a one-way exhaust valve. The coal bucket is used to store the coal sample. The coal bucket lid can cover the upper opening of the coal bucket. The coal bucket lid is also provided with an exhaust hole and a nitrogen inlet pipe. The exhaust hole is used to discharge the gas inside the coal bucket and allow it to enter the outer cover. The nitrogen inlet pipe is used to connect to the upper gas supply pipe. The buffer bucket is disposed between the outer bucket and the coal bucket to buffer the temperature and pressure difference between the outer bucket and the coal bucket and to catch coal dust from the coal sample that leaks out of the coal bucket.

2. The coal sample storage device as described in claim 1, characterized in that: The upper opening of the outer barrel is connected to the cylinder wall of the outer cover through a mutually cooperating connecting mechanism, and the connection through the connecting mechanism enables the outer cover to seal the upper opening of the outer barrel.

3. The coal sample storage device as described in claim 2, characterized in that: The connecting mechanism consists of an external thread on the upper opening of the outer barrel and an internal thread on the inner wall of the outer cover that mates with the external thread, and a sealing gasket is also provided on the upper opening of the outer barrel; or The connecting mechanism consists of a lock head located on the outside of the upper opening of the outer tub and a latch located on the outside of the outer cover wall that can engage with the lock head for locking. An O-ring is also provided on the outside of the upper opening of the outer tub.

4. The coal sample holder of claim 1, wherein: The outer barrel is provided with at least one handle on its outer wall, and a base is provided at the bottom of the outer barrel.

5. The coal sample storage device as described in claim 1, characterized in that: The coal bucket is provided with a handle on the outside of its upper opening. The handle is an inverted J-shaped component, and the bent part of the inverted J-shaped handle can rest on the edge of the opening of the buffer bucket.

6. The coal sample holder of claim 1, wherein: The buffer tank has through holes on its wall or the upper part of its wall is made of a screen.

7. The coal sample storage device as described in claim 1, characterized in that: The buffer bucket is provided with a buffer handle on the outside of its upper opening. The buffer handle is an inverted J-shaped component. The protruding part of the J-shaped component can rest on the edge of the opening of the outer bucket, and its vertical part can be positioned and engaged with the groove provided on the inner wall of the outer bucket as a positioning component.

8. The coal sample storage device as described in claim 1, characterized in that: It also includes a nitrogen filling device, which includes a nitrogen source and a dryer. The nitrogen source is connected to the lower part of the dryer, and the upper part of the dryer is connected to the switch valve.

9. The coal sample storage device as described in claim 8, characterized in that: The nitrogen source is a compressed nitrogen cylinder / compressed nitrogen package; or The nitrogen source consists of a compressed nitrogen capsule and a compressed nitrogen capsule tube. When the compressed nitrogen capsule is placed inside the compressed nitrogen capsule tube, the compressed nitrogen capsule tube is connected to the upper part of the dryer. Then, the compressed nitrogen capsule tube is rotated to cause the compressed nitrogen capsule to be crushed under pressure, releasing the high-pressure nitrogen gas inside.

10. The coal sample storage device as described in claim 1, characterized in that: It also includes a nitrogen concentration detector, which is connected to the one-way exhaust valve and is used to detect the nitrogen concentration inside the outer barrel.

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