A kind of coal quality detection with assay device

Abstract

The utility model relates to coal detection technical field discloses a kind of test devices for coal quality detection, including outer tube, the top of the outer tube is provided with top cover, the bottom of the top cover is provided with heat release mechanism, the heat release mechanism is used to burn and release coal heat, the inner bottom of the outer tube is provided with isolation mechanism, the isolation mechanism is used to isolate the heat exchange of outside occurrence, the heat release mechanism includes inner tube, the outer wall of the inner tube is fixedly connected in the inner wall of outer tube, the inner wall of the inner tube is fixedly connected with oxygen bomb, the top of the inner tube is provided with gland. In the utility model, oxygen bomb quantitative oxygenation and sample ignition combustion, water temperature is uniform and temperature monitoring, oxygen bomb safety pressure relief and gland convenient opening, when oxygen bomb oxygenation pressure is full and to higher pressure, pressure is close to oxygen bomb pressure limit, air release valve initiatively exhaust pressure relief, avoid pressure to exceed oxygen bomb bearing range, effectively guarantee detection safety.

Description

Technical Field

[0001] This utility model relates to the field of coal testing technology, and in particular to a testing device for coal quality testing. Background Technology

[0002] In coal quality testing, the calorific value is measured, which is the amount of heat released when a unit mass of coal is completely burned. This is a key indicator for measuring the value of coal combustion, reflecting the energy utilization efficiency of coal in the industrial and power generation fields, and is an important basis for coal pricing and application.

[0003] Coal calorific value testing requires specialized testing equipment, as the calorific value of coal is a core indicator that directly affects the efficiency of power generation and heating. The equipment can accurately measure the calorific value, providing data for coal pricing and application scenario matching. At the same time, it helps to control combustion emissions, ensuring the economic and environmental benefits of energy utilization. It is an essential tool for the standardized and efficient operation of the industry.

[0004] During coal combustion testing, heat generated during combustion can leak, leading to inaccurate measurement results and affecting the judgment of coal quality. In existing technologies, oxygen bombs are used to create a sealed environment for measuring combustion heat, which can reduce heat leakage, improve detection accuracy, and ensure the reliability of heat measurement. However, in actual use, if the oxygen bomb is mistakenly charged to a higher pressure, even without combustion reaction, the static pressure will approach the pressure limit of the oxygen bomb. After the heat released during combustion, the pressure will rise further, exceeding the oxygen bomb's tolerance range, causing safety risks and failing to effectively guarantee the safety of the test. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a testing device for coal quality, which aims to improve the problem in the prior art where, when the oxygen bomb is mistakenly charged to a higher pressure, even without combustion reaction, the static pressure will approach the pressure limit of the oxygen bomb. After the heat released by combustion, the pressure will further increase, exceeding the oxygen bomb's tolerance range, causing safety risks and failing to effectively guarantee the safety of testing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a testing device for coal quality detection, comprising an outer cylinder, a top cover provided at the top of the outer cylinder, a heat release mechanism provided at the bottom of the top cover, the heat release mechanism being used to release heat from the coal through combustion, and an isolation mechanism provided at the bottom inner side of the outer cylinder, the isolation mechanism being used to isolate heat exchange occurring in the outside.

[0007] The heat release mechanism includes an inner cylinder, the outer wall of which is fixedly connected to the inner wall of an outer cylinder. An oxygen bomb is fixedly connected to the inner wall of the inner cylinder. A pressure cap is provided at the top of the inner cylinder. A pressure sensor is fixedly connected to the bottom of the pressure cap. An oxygen filling valve is fixedly connected to the top left side of the pressure cap. An air venting valve is fixedly connected to the top right side of the pressure cap. A temperature sensor is fixedly connected to the bottom inner side of the inner cylinder. A placement assembly is provided at the bottom inner side of the oxygen bomb. An ignition assembly is provided inside the oxygen bomb. A driving assembly is provided at the bottom of the outer cylinder. A stirring assembly is provided at the top of the driving assembly. A fixing assembly is provided at the top of the pressure cap.

[0008] As a further description of the above technical solution:

[0009] The isolation mechanism includes a heat insulation pad, the bottom of which is fixedly connected to the inner bottom of the outer cylinder. A heating ring is fixedly connected to the inner bottom of the outer cylinder. A water injection seat is fixedly connected to the right bottom of the outer cylinder. A valve is fixedly connected to the right side of the water injection seat. A sealing component is provided at the bottom of the top cover.

[0010] As a further description of the above technical solution:

[0011] The placement assembly includes a ceramic frame, the bottom of which is fixedly connected to the inner bottom of the oxygen bomb, and a crucible is fixedly connected to the top of the ceramic frame.

[0012] As a further description of the above technical solution:

[0013] The ignition assembly includes two electrodes, with the two electrodes on opposite sides fixedly connected to the inside of the oxygen bomb, and an ignition wire fixedly connected between adjacent electrodes.

[0014] As a further description of the above technical solution:

[0015] The drive assembly includes a motor, the top of which is fixedly connected to the bottom of the outer cylinder. A bearing is fixedly connected to the bottom of the outer cylinder, and a bearing is fixedly connected to the bottom of the inner cylinder.

[0016] As a further description of the above technical solution:

[0017] The stirring assembly includes a rotating shaft, the bottom of which is fixedly connected to the top of a motor, and blades are fixedly connected to the top of the rotating shaft.

[0018] As a further description of the above technical solution:

[0019] The fixing component includes multiple bolts, the bottom of which is threaded to the top of the gland, and the bottom of the gland is fixedly connected with multiple clips.

[0020] As a further description of the above technical solution:

[0021] The sealing assembly includes a sealing ring, the outer side of which is fixedly connected to the bottom of the top cover, and a sealing groove is provided on the top of the outer wall of the outer cylinder.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the oxygen bomb is quantitatively filled with oxygen and the sample is ignited and burned. The water temperature is uniform and the temperature is monitored. The oxygen bomb is safely depressurized and the cap is easily opened. When the oxygen bomb is fully filled with oxygen and reaches a higher pressure, and the pressure approaches the pressure limit of the oxygen bomb, the vent valve actively releases air and depressurizes to avoid the pressure exceeding the oxygen bomb's tolerance range, reduce safety risks, and effectively ensure the safety of the test.

[0024] 2. In this utility model, the heat insulation pad is laid on the bottom of the inner side of the outer cylinder. The heating ring is energized to heat the medium inside the cylinder. After the valve is opened and the medium is injected through the water injection seat, it is closed. The top cover is closed so that the sealing ring is embedded in the sealing groove. The heating ring, heat insulation pad and sealing components work together to maintain the temperature. Opening the valve can discharge the old medium and inject the new medium, reduce the heat exchange between the inside and outside of the outer cylinder, regulate the internal temperature, facilitate the injection, sealing and replacement of the medium, enhance the sealing performance of the top cover, and maintain the stable temperature inside the cylinder to meet different working requirements. Attached Figure Description

[0025] Figure 1 This is a perspective view of a coal quality testing apparatus proposed in this utility model;

[0026] Figure 2 This is a front view of a testing device for coal quality detection proposed in this utility model;

[0027] Figure 3 This is a cross-sectional view of the top cover of a coal quality testing apparatus proposed in this utility model.

[0028] Figure 4 This is a cross-sectional view of the outer cylinder of a coal quality testing apparatus proposed in this utility model;

[0029] Figure 5 This is a cross-sectional view of the oxygen bomb in a coal quality testing apparatus proposed in this utility model.

[0030] Legend:

[0031] 1. Outer cylinder; 2. Top cover; 3. Heat release mechanism; 31. Inner cylinder; 32. Oxygen bomb; 33. Pressure cap; 34. Pressure sensor; 35. Oxygen filling valve; 36. Gas release valve; 37. Temperature sensor; 38. Placement assembly; 381. Ceramic rack; 382. Crucible; 39. Ignition assembly; 391. Electrode; 392. Ignition wire; 310. Drive assembly; 3101. Motor; 3102. Bearing 1; 3103. Bearing 2; 311. Stirring assembly; 3111. Rotating shaft; 3112. Paddle; 312. Fixing assembly; 3121. Bolt; 3122. Buckle; 4. Isolation mechanism; 41. Heat insulation pad; 42. Heating ring; 43. Water injection base; 44. Valve; 45. Sealing assembly; 451. Sealing ring; 452. Sealing groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 , Figure 4 and Figure 5 An embodiment of this utility model is provided: a testing device for coal quality testing, including an outer cylinder 1, a top cover 2 provided at the top of the outer cylinder 1, a heat release mechanism 3 provided at the bottom of the top cover 2, the heat release mechanism 3 being used to release heat from the coal through combustion, and an isolation mechanism 4 provided at the bottom of the inner side of the outer cylinder 1, the isolation mechanism 4 being used to isolate heat exchange occurring in the outside.

[0034] The heat release mechanism 3 includes an inner cylinder 31, the outer wall of which is fixedly connected to the inner wall of the outer cylinder 1. An oxygen bomb 32 is fixedly connected to the inner wall of the inner cylinder 31. A pressure cap 33 is provided at the top of the inner cylinder 31. A pressure sensor 34 is fixedly connected to the bottom of the pressure cap 33. An oxygen filling valve 35 is fixedly connected to the top left side of the pressure cap 33. An air release valve 36 is fixedly connected to the top right side of the pressure cap 33. A temperature sensor 37 is fixedly connected to the bottom of the inner side of the inner cylinder 31. A placement assembly 38 is provided at the bottom of the inner side of the oxygen bomb 32. The placement assembly 38 includes a ceramic frame 381. The bottom of the ceramic frame 381 is fixedly connected to the bottom of the inner side of the oxygen bomb 32. A crucible 382 is fixedly connected to the top of the ceramic frame 381.

[0035] An ignition assembly 39 is provided on the inner side of the oxygen bomb 32. The ignition assembly 39 includes two electrodes 391. The two electrodes 391 are fixedly connected to the inner side of the oxygen bomb 32 on opposite sides. An ignition wire 392 is fixedly connected between adjacent electrodes 391. A drive assembly 310 is provided at the bottom of the outer cylinder 1. The drive assembly 310 includes a motor 3101. The top of the motor 3101 is fixedly connected to the bottom of the outer cylinder 1. A bearing 3102 is fixedly connected to the bottom of the outer cylinder 1. A bearing 3103 is fixedly connected to the bottom of the inner cylinder 31.

[0036] A stirring assembly 311 is provided on the top of the drive assembly 310. The stirring assembly 311 includes a rotating shaft 3111. The bottom of the rotating shaft 3111 is fixedly connected to the top of the motor 3101. A blade 3112 is fixedly connected to the top of the rotating shaft 3111. A fixing assembly 312 is provided on the top of the pressure cap 33. The fixing assembly 312 includes multiple bolts 3121. The bottom of the multiple bolts 3121 is threaded to the top of the pressure cap 33. Multiple buckles 3122 are fixedly connected to the bottom of the pressure cap 33.

[0037] Specifically, when the exothermic mechanism 3 is working, the inner cylinder 31 is fixed to the inner wall of the outer cylinder 1 to provide installation space. The oxygen bomb 32 is fixed to the inner wall of the inner cylinder 31. Coal is placed in the crucible 382 of the inner bottom of the oxygen bomb 32, which is where the component 38 is placed. The ceramic frame 381 supports the crucible 382. Through the cooperation between the ceramic frame 381 and the crucible 382, ​​the sample is stably placed. The pressure cap 33 is closed on the top of the inner cylinder 31. The bolts 3121 of the fixing component 312 fix the pressure cap 33 to the inner cylinder 31. The buckle 3122 further enhances the connection sealing. Through the cooperation between the bolts 3121 and the buckle 3122, the pressure cap 33 is securely installed.

[0038] Oxygen is introduced into the oxygen bomb 32 through the oxygen filling valve 35. The pressure sensor 34 monitors the pressure inside the oxygen bomb 32. The oxygen filling stops when the set value is reached. Through the cooperation of the oxygen filling valve 35 and the pressure sensor 34, the oxygen in the oxygen bomb 32 is quantitatively filled. The electrode 391 of the ignition assembly 39 is energized, which causes the ignition wire 392 to heat up and ignite the sample. The coal sample burns and releases heat in the oxygen bomb 32. Through the cooperation of the electrode 391 and the ignition wire 392, the coal sample is ignited and burned.

[0039] Temperature sensor 37 at the bottom of the inner cylinder 31 monitors the temperature change of the water in the inner cylinder 31. Motor 3101 of drive assembly 310 starts and drives the blade 3112 of stirring assembly 311 to rotate through shaft 3111. Bearing 1 3102 and bearing 2 3103 reduce friction when shaft 3111 rotates. Both bearing 1 3102 and bearing 2 3103 are airtight bearings. Through the cooperation of motor 3101 and blade 3112, the water temperature in inner cylinder 31 is made uniform.

[0040] After combustion, the gas inside the oxygen bomb 32 is released through the venting valve 36. The bolt 3121 is unscrewed, the buckle 3122 is released, the pressure cap 33 is opened, and the crucible 382 is taken out. Through the cooperation of the venting valve 36 and the bolt 3121, the oxygen bomb 32 is safely depressurized and the pressure cap 33 is easily opened.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The isolation mechanism 4 includes a heat insulation pad 41, the bottom of which is fixedly connected to the bottom of the inner side of the outer cylinder 1. A heating ring 42 is fixedly connected to the bottom of the inner side of the outer cylinder 1. A water injection seat 43 is fixedly connected to the bottom right side of the outer cylinder 1. A valve 44 is fixedly connected to the right side of the water injection seat 43. A sealing assembly 45 is provided at the bottom of the top cover 2. The sealing assembly 45 includes a sealing ring 451. The outer side of the sealing ring 451 is fixedly connected to the bottom of the top cover 2. A sealing groove 452 is provided on the top of the outer wall of the outer cylinder 1.

[0042] Specifically, the heat insulation pad 41 is laid on the bottom inner side of the outer cylinder 1. Through the cooperation of the heat insulation pad 41 and the outer cylinder 1, the heat exchange between the inside of the outer cylinder 1 and the outside is reduced, and the temperature environment inside the outer cylinder 1 is kept stable. The heating ring 42 at the bottom inner side of the outer cylinder 1 generates heat after being powered on, which can heat the medium inside the cylinder. Through the cooperation of the heating ring 42 and the outer cylinder 1, the temperature inside the outer cylinder 1 can be regulated to meet the temperature requirements under different working scenarios.

[0043] When it is necessary to inject the medium into the outer cylinder 1, open the valve 44 on the right side of the water injection seat 43. The medium flows into the outer cylinder 1 through the water injection seat 43. After the injection is completed, close the valve 44. Through the cooperation of the water injection seat 43 and the valve 44, the medium can be conveniently injected and sealed for preservation, preventing medium leakage. When the top cover 2 is closed on the top of the outer cylinder 1, the sealing ring 451 of the sealing component 45 is embedded in the sealing groove 452 on the top of the outer wall of the outer cylinder 1. Through the cooperation of the sealing ring 451 and the sealing groove 452, the sealing performance between the top cover 2 and the outer cylinder 1 is enhanced, further reducing heat loss and interference from external factors on the internal environment of the cylinder.

[0044] When the inner temperature of the outer cylinder 1 needs to be maintained at a specific temperature, the heating ring 42 provides heat as required, the heat insulation pad 41 blocks the heat from being transferred to the outside, and the sealing structure of the top cover 2 prevents heat from being lost from the top. Through the cooperation of the heating ring 42, the heat insulation pad 41 and the sealing assembly 45, the temperature inside the outer cylinder 1 is maintained stably.

[0045] If the medium inside the cylinder needs to be replaced, open valve 44 to discharge the old medium, and then inject the new medium through water injection seat 43. The rapid replacement of the medium is achieved through the cooperation of valve 44 and water injection seat 43.

[0046] Working principle: Check the status of each component to ensure that the water injection seat 43 and valve 44 are tightly connected. Open valve 44 and inject an appropriate amount of medium into the outer cylinder 1 through water injection seat 43. After observing that the liquid level of the medium in the outer cylinder 1 reaches the preset position, close valve 44 to prevent medium leakage. Lay the heat insulation pad 41 flat on the bottom inner side of the outer cylinder 1 to ensure that it completely covers the bottom inner side area of ​​the outer cylinder 1. Then close the top cover 2 so that the sealing ring 451 of the bottom sealing component 45 of the top cover 2 is accurately embedded in the sealing groove 452 on the top of the outer wall of the outer cylinder 1 to enhance the sealing performance of the outer cylinder 1.

[0047] Operate the exothermic mechanism 3, open the pressure cap 33, and place the coal sample to be tested into the crucible 382 of the inner bottom placement component 38 of the oxygen bomb 32. Ensure that the sample is evenly placed in the crucible 382. The ceramic frame 381 provides stable support for the crucible 382 to prevent the crucible 382 from tilting or shifting in subsequent operations. Close the pressure cap 33 and fix the pressure cap 33 to the top of the inner cylinder 31 by multiple bolts 3121 of the fixing component 312. At the same time, multiple buckles 3122 at the bottom of the pressure cap 33 engage with the corresponding positions at the top of the inner cylinder 31 to further enhance the sealing and stability of the connection.

[0048] Open the oxygen filling valve 35 on the top left of the pressure cap 33 to fill the oxygen bomb 32 with oxygen. The pressure sensor 34 at the bottom of the pressure cap 33 monitors the pressure value inside the oxygen bomb 32 in real time. When the pressure reaches the set standard, close the oxygen filling valve 35 to stop filling with oxygen and start the ignition assembly 39 to energize the two electrodes 391. The current passes through the ignition wire 392 to generate heat, which in turn ignites the coal sample in the crucible 382. The coal sample burns fully in the oxygen environment inside the oxygen bomb 32 and releases heat.

[0049] During combustion, the motor 3101 of the drive assembly 310 at the bottom of the outer cylinder 1 is started. The motor 3101 drives the rotating shaft 3111 at the top to rotate. The rotating shaft 3111 passes through the bearing 3102 at the bottom of the outer cylinder 1 and the bearing 3103 at the bottom of the inner cylinder 31 to reduce the frictional resistance during rotation. The blade 3112 at the top of the rotating shaft 3111 rotates synchronously with the rotating shaft 3111 to stir the water in the inner cylinder 31, so that the water temperature is uniform. The temperature sensor 37 at the bottom of the inner side of the inner cylinder 31 monitors the temperature change of the water in real time and records the temperature data.

[0050] The heating ring 42 at the bottom inner side of the outer cylinder 1 is powered on as needed to generate heat to regulate the temperature of the medium inside the cylinder. Together with the heat insulation pad 41 at the bottom inner side of the outer cylinder 1, it reduces the transfer of heat to the outside. The sealing component 45 between the top cover 2 and the outer cylinder 1 prevents heat loss from the top, thus maintaining the stability of the internal temperature environment of the outer cylinder 1.

[0051] After the coal sample has finished burning, open the vent valve 36 on the top right side of the pressure cap 33 to slowly release the gas in the oxygen bomb 32. After the pressure is completely released, unscrew the bolt 3121 of the fixing component 312, release the buckle 3122, open the pressure cap 33, and take out the crucible 382 to complete the entire testing process. The calorific value of the coal can be calculated by the temperature change data recorded by the temperature sensor 37, thus realizing the detection of coal quality.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing device for coal quality, comprising an outer cylinder (1), characterized in that: The top of the outer cylinder (1) is provided with a top cover (2), and the bottom of the top cover (2) is provided with a heat release mechanism (3). The heat release mechanism (3) is used to burn and release the heat of coal. The bottom of the inner side of the outer cylinder (1) is provided with an isolation mechanism (4). The isolation mechanism (4) is used to isolate the heat exchange that occurs in the outside. The heat release mechanism (3) includes an inner cylinder (31), the outer wall of which is fixedly connected to the inner wall of the outer cylinder (1), an oxygen bomb (32) is fixedly connected to the inner wall of the inner cylinder (31), a pressure cap (33) is provided at the top of the inner cylinder (31), a pressure sensor (34) is fixedly connected to the bottom of the pressure cap (33), an oxygen filling valve (35) is fixedly connected to the top left side of the pressure cap (33), an air release valve (36) is fixedly connected to the top right side of the pressure cap (33), a temperature sensor (37) is fixedly connected to the inner bottom of the inner cylinder (31), a placement component (38) is provided at the inner bottom of the oxygen bomb (32), an ignition component (39) is provided inside the oxygen bomb (32), a driving component (310) is provided at the bottom of the outer cylinder (1), a stirring component (311) is provided at the top of the driving component (310), and a fixing component (312) is provided at the top of the pressure cap (33).

2. The testing device for coal quality detection according to claim 1, characterized in that: The isolation mechanism (4) includes a heat insulation pad (41), the bottom of which is fixedly connected to the bottom of the inner side of the outer cylinder (1). A heating ring (42) is fixedly connected to the bottom of the inner side of the outer cylinder (1). A water injection seat (43) is fixedly connected to the bottom right side of the outer cylinder (1). A valve (44) is fixedly connected to the right side of the water injection seat (43). A sealing assembly (45) is provided at the bottom of the top cover (2).

3. The testing device for coal quality detection according to claim 1, characterized in that: The placement assembly (38) includes a ceramic frame (381), the bottom of which is fixedly connected to the inner bottom of the oxygen bomb (32), and the top of which is fixedly connected to a crucible (382).

4. The testing device for coal quality detection according to claim 1, characterized in that: The ignition assembly (39) includes two electrodes (391), with the two electrodes (391) fixedly connected to the inner side of the oxygen bomb (32) on opposite sides, and an ignition wire (392) fixedly connected between adjacent electrodes (391).

5. A testing device for coal quality detection according to claim 1, characterized in that: The drive assembly (310) includes a motor (3101), the top of which is fixedly connected to the bottom of the outer cylinder (1), the bottom of which is fixedly connected to a bearing (3102), and the bottom of which is fixedly connected to a bearing (3103).

6. The testing device for coal quality detection according to claim 5, characterized in that: The stirring assembly (311) includes a rotating shaft (3111), the bottom of which is fixedly connected to the top of a motor (3101), and a blade (3112) is fixedly connected to the top of the rotating shaft (3111).

7. A testing device for coal quality detection according to claim 1, characterized in that: The fixing component (312) includes a plurality of bolts (3121), the bottom of which is threaded to the top of the cover (33), and the bottom of the cover (33) is fixedly connected to a plurality of buckles (3122).

8. A testing device for coal quality detection according to claim 2, characterized in that: The sealing assembly (45) includes a sealing ring (451), the outer side of which is fixedly connected to the bottom of the top cover (2), and a sealing groove (452) is provided on the top of the outer wall of the outer cylinder (1).

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