Constant-temperature cylinder for detecting calorific value of coal

Abstract

The present invention belongs to the technical field of calorific value measuring equipment, and provides a constant temperature cylinder for detecting the calorific value of coal, which includes a cylinder body and a heat insulation layer arranged inside the cylinder body. An oxygen bomb is installed inside the cylinder body. A water inlet and outlet is arranged on one side of the cylinder body, and the water inlet and outlet is communicated with a water circuit system. An insulating plate is arranged at the water inlet and outlet and is vertically slidably connected to the heat insulation layer. An opening and closing member fixedly connected to the insulating plate is fixedly connected to the cylinder body. The structure of the present invention is simple. After water is sent into the cylinder body, the water inlet and outlet are closed by the insulating plate to avoid heat absorption by the water delivery pipeline and improve the accuracy of calorific value measurement.

Description

Technical Field

[0001] The present invention belongs to the technical field of calorific value measuring equipment, and particularly relates to a constant temperature cylinder for detecting the calorific value of coal. Background Art

[0002] To measure the calorific value of a combustible substance, a certain amount of the test sample is placed in a sealed oxygen bomb. Under sufficient oxygen conditions, the test sample is completely burned, and the heat released by the combustion is absorbed by the oxygen bomb and a certain amount of water (inner cylinder water) around it. The temperature rise of the water is proportional to the heat released by the combustion of the test sample. Under specified conditions, the heat capacity of the calorimeter is pre-calibrated in advance. When measuring the calorific value, as long as the measurement is carried out strictly according to the conditions for calibrating the heat capacity, the calorific value of the test sample can be calculated based on the temperature rise value of the inner cylinder water after the combustion of the test sample.

[0003] In the prior art, Chinese Patent CN 211978738 U discloses a constant temperature barrel for measuring the calorific value of coal, belonging to the technical field of constant temperature barrels, including an outer shell, a water storage tank, an inner barrel, an outer barrel, an oxygen bomb, a mounting cover, a water inlet pipe, a water pump and a water inlet valve. A waterproof motor for driving the inner barrel to rotate is installed at the inner bottom of the outer barrel, and a first stirring blade is fixed on the outer side of the inner barrel; a floating plate sleeved on the inner barrel is horizontally arranged in the cavity between the outer barrel and the inner barrel, a second contact is fixed on the upper end surface of the floating plate, a temperature measuring instrument and a first contact opposite to the second contact are fixed on the inner side wall of the outer barrel, and the water pump and the water inlet valve can be controlled to stop when the first contact and the second contact are triggered; a heat insulation mechanism is arranged on the outer side of the outer barrel; a water filling pipe extending to the outside of the outer shell is connected to the upper end of one side of the water storage tank. The stirring effect of the stirrer of the present invention is better, and the accuracy of temperature detection is higher; and it can automatically stop the process of filling water into the outer barrel, and the application is relatively convenient.

[0004] However, the above device does not consider the heat absorbed by the stirring blades and the inlet and outlet water pipes, resulting in a decrease in the accuracy of calorific value measurement. Summary of the Invention

[0005] The present invention aims to solve the problems described in the background art and provides a constant temperature cylinder for detecting the calorific value of coal.

[0006] To achieve the above object, the present invention adopts the following technical solution: A constant temperature cylinder for detecting the calorific value of coal, including a cylinder body and a heat insulation layer arranged inside the cylinder body. An oxygen bomb is installed inside the cylinder body. A water inlet and outlet is arranged on one side of the cylinder body, and the water inlet and outlet is communicated with a water circuit system. An insulating plate vertically slidably connected to the heat insulation layer is arranged at the water inlet and outlet, and an opening and closing member fixedly connected to the insulating plate is fixedly connected to the cylinder body.

[0007] In a preferred embodiment of the present invention, the waterway system includes a controller, which is electrically connected to a water pump and a suction pump. The water pump is connected to a flow meter, the flow meter is electrically connected to the controller, the flow meter is connected to an electromagnetic reversing valve, the electromagnetic reversing valve is connected to the water inlet and outlet, and the electromagnetic reversing valve is connected to both the water pump and the suction pump.

[0008] In a preferred embodiment of the present invention, the controller is electrically connected to the igniter of the oxygen bomb.

[0009] In a preferred embodiment of the present invention, it further includes an adjustment system for controlling the volume inside the cylinder.

[0010] In a preferred embodiment of the present invention, the adjustment system includes an adjustment plate that is vertically slidably fitted with the heat insulation layer. The adjustment plate is made of heat insulation material, and balls are rotatably fitted on both sides of the adjustment plate. A number of power components are provided on the cylinder body, the output shaft of the power component is connected to the adjustment plate, and a number of power components are electrically connected to the controller.

[0011] In a preferred embodiment of the present invention, a driving component is fixedly connected to the cylinder body, an adjusting component is provided on the output shaft of the driving component, the adjusting component is fixedly connected to the adjustment plate, a number of power components are rotatably fitted with the cylinder body, the output shafts of a number of power components are slidably fitted with the adjustment plate, and the driving component is electrically connected to the controller;

[0012] A number of rotating shafts made of heat insulation material are provided on the adjustment plate, and a number of stirring groups made of heat insulation material are provided on the rotating shafts.

[0013] In a preferred embodiment of the present invention, a number of stirring groups are evenly distributed along the axial direction of the rotating shaft. The stirring group includes an inner ring that is rotatably fitted with the rotating shaft, and a number of blades are fixedly connected to the inner ring along its circumference.

[0014] In a preferred embodiment of the present invention, an annular groove is formed on the rotating shaft, a slider is provided on the inner ring and is located in the annular groove, and the inner ring is rotatably fitted with the rotating shaft through the slider and the annular groove.

[0015] In a preferred embodiment of the present invention, a guiding groove is formed on the side wall of the heat insulation layer, and the balls are located in the guiding groove.

[0016] In a preferred embodiment of the present invention, the electromagnetic reversing valve is connected to a pipe whose length is greater than the length of the cylinder body.

[0017] The principle and beneficial effects of the present invention: (1) In order to reduce heat transfer so that the temperature inside the cylinder remains basically constant (not absolute). For this reason, a heat insulation layer is adopted and the water inlet and outlet are closed. Compared with the prior art, the present invention takes into account the problem that the heat absorbed by the pipeline inside the cylinder and the heat transfer cause the accurate measurement of the calorific value to decrease.

[0018] (2) In the present invention, a rotating shaft and blades made of heat-insulating materials are adopted to reduce the heat absorbed by the rotating shaft or the blades. When stirring distilled water, the driving member drives the adjusting plate and the rotating shaft to rotate to form a revolution stirring, and drives the blades to rotate and stir under the action of the distilled water, so as to form a multi-stage stirring, enabling the distilled water to be in full contact with the oxygen bomb.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is the front view of the constant temperature cylinder for detecting the calorific value of coal in the present invention;

[0022] Figure 2 is Figure 1 the enlarged view of part A of

[0023] Figure 3 is the circuit schematic diagram of the constant temperature cylinder for detecting the calorific value of coal in the present invention.

[0024] The reference numerals in the drawings of the specification include: cylinder body 11, heat-insulating layer 12, oxygen bomb 13, igniter 14, electric control cylinder 15, heat-insulating plate 16, water inlet and outlet 17, electromagnetic reversing valve 21, flowmeter 22, water pump 23, suction pump 24, rotating shaft 31, annular groove 32, blade 33, stroke-adjustable cylinder 34, adjusting plate 35, motor 36, connecting portion 361, extension shaft 362, mounting portion 363, extension groove 364, extension block 365, guiding groove 37, ball 38. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] This application provides a constant-temperature cylinder for detecting the calorific value of coal, which is basically attached Figure 1 attached Figure 2 and attached Figure 3 As shown in the figures, it includes a frame and a cylinder body 11 installed on the frame. An oxygen bomb 13 is detachably installed inside the cylinder body 11. A certain amount of coal is put into the oxygen bomb 13 and then installed on the cylinder body 11.

[0029] In this embodiment, an insulating layer 12 made of insulating material is installed inside the cylinder body 11. The insulating material can be selected as a vacuum insulating panel 16 or a heat insulating board, etc., and is selected according to actual needs to minimize the heat transfer inside the cylinder body 11. On one side of the upper part of the cylinder body 11, there is a water inlet and outlet 17. A pipeline is connected to the left side of the water inlet and outlet 17. The pipeline is detachably connected to the cylinder body 11, and the length of the pipeline is greater than the length of the cylinder body 11. An insulating board 16 (made of insulating material) that is vertically slidably connected to the insulating layer 12 is arranged inside the water inlet and outlet 17. An opening and closing member is fixedly connected to the cylinder body 11. The opening and closing member is an electric control cylinder 15. The output shaft of the electric control cylinder 15 is fixedly connected to the insulating board 16, and the insulating board 16 is used to close the water inlet and outlet 17.

[0030] The pipeline is connected to a water circuit system. The water circuit system includes an electromagnetic directional valve 21 connected to the pipeline. The electromagnetic directional valve 21 is connected to a flow meter 22 and a suction pump 24. The flow meter 22 is connected to a water pump 23. It also includes a controller. The controller is electrically connected to the electromagnetic directional valve 21, the flow meter 22, the electric control cylinder 15, the water pump 23, the suction pump 24, and the igniter 14 of the oxygen bomb 13. The controller is electrically connected to an input module, and the input module can be a computer.

[0031] In this embodiment, it further includes an adjustment system for controlling the internal volume of the cylinder body 11. The adjustment system includes an adjustment plate 35 (made of heat-insulating material) that is vertically slidably engaged with the heat-insulating layer 12. Ball bearings 38 are rotatably engaged on both sides of the adjustment plate 35. Guide grooves 37 are formed on both sides of the heat-insulating layer 12. The ball bearings 38 are located in the guide grooves 37, that is, the adjustment plate 35 is vertically slidably engaged with the heat-insulating layer 12 through the ball bearings 38 and the guide grooves 37.

[0032] A cylinder group is provided on the cylinder body 11. The cylinder group includes a number of cylinders 34 with adjustable strokes. The cylinders 34 with adjustable strokes are fixedly connected to the cylinder body 11. An annular limit groove is formed on the adjustment plate 35. The output shaft of the cylinder 34 with adjustable stroke extends into the limit groove and abuts against the adjustment plate 35. The cylinder 34 with adjustable stroke is electrically connected to the controller.

[0033] In this embodiment, a driving member is fixedly connected to the cylinder body 11. The driving member is a motor 36. A connecting portion 361 is fixedly connected to the output shaft of the motor 36. An extension shaft 362 is arranged in the connecting portion 361. An extension block 365 is fixedly connected to the extension shaft 362. An extension groove 364 that is vertically slidably engaged with the extension block 365 is formed on the connecting portion 361. An installation portion 363 is connected to the extension shaft 362 through a pin. The installation portion 363 is fixedly connected to the adjustment plate 35.

[0034] The adjustment plate 35 is circular. A number of rotating shafts 31 (made of heat-insulating material) are rotatably connected to the adjustment plate 35 along its circumference. A number of stirring groups are arranged on the rotating shafts 31 along their vertical directions. Each stirring group includes an inner ring and a number of blades 33 fixed on the outer circumference of the inner ring. Both the inner ring and the blades 33 are made of heat-insulating material. An annular groove 32 is formed on the rotating shaft 31. A sliding block that is slidably engaged with the annular groove 32 is fixedly connected to the inner ring.

[0035] The specific implementation process is as follows:

[0036] In this embodiment, a certain amount of coal is weighed and placed into the oxygen bomb 13. Then, the oxygen bomb 13 is installed in the cylinder body 11. Then, the amount of coal is input into the controller through the input module. After the controller obtains the information, the controller will start the electric cylinder 15 and open the water inlet and outlet 17. Then, the water pump 23 is started and water is sent into the cylinder body 11 through the flow meter 22 and the electromagnetic reversing valve 21. The flow meter 22 measures the amount of water and feeds back the information to the controller. When the required amount of water is reached, the controller closes the water pump 23 and controls the electric cylinder 15 to drive the heat-insulating plate 16 to seal the water inlet and outlet 17. After 1 s, the controller controls the igniter 14 to ignite the coal in the oxygen bomb 13.

[0037] In this embodiment, based on the amount of distilled water fed back by the flowmeter 22, the controller activates the cylinder, and the cylinder drives the adjusting plate 35 to move vertically, so as to push the distilled water up or down, ensuring that the oxygen bomb 13 is immersed in the distilled water (at this time, the mounting portion 363 on the extension shaft 362 moves up or down with the adjusting plate 35). During the combustion process of the coal in the oxygen bomb 13, the controller controls the motor 36 to operate, and the motor 36 drives the adjusting plate 35 to rotate, so that the rotating shaft 31 stirs the distilled water, and drives the blade 33 to rotate under the action of the distilled water to form multi-stage agitation, enabling the distilled water to fully contact the oxygen bomb 13.

[0038] After the coal in the oxygen bomb 13 is completely burned, the temperature of the water is measured by an existing measuring instrument (the measuring instrument can be arranged in the cylinder body 11), or the water can be taken out of the cylinder body 11. Specifically: the operator inputs a measurement instruction to the controller through the input module, and the controller controls the electric control cylinder 15 to drive the heat insulation plate 16 to open the water inlet and outlet 17. At the same time, it controls the electromagnetic directional valve 21 to communicate with the suction pump 24, and controls a stroke-adjustable cylinder 34 (as shown in the appendix Figure 1 ), the adjustable stroke cylinder on the right pushes the right side of the adjusting plate 35 to slide upward, making the adjusting plate 35 tilt (at this time, the connecting portion 361 rotates on the extension shaft 362), then the pipeline is inserted into the cylinder body 11, and the suction pump 24 pumps out the water, and then it is measured by the measuring instrument. In this embodiment, both the water inlet and the water outlet are one port, which reduces the setting of pipelines and reduces the problem that the heat absorption of the pipelines leads to inaccurate calorific value measurement. At the same time, in this embodiment, the water inflow and other basic intelligent controls improve the efficiency and accuracy of the entire measurement process.

[0039] In this embodiment, experimental work can be carried out on calorific value measurement. For example, in the prior art, Chinese Patent CN211978738 U, the amount of distilled water in the cylinder body 11 is basically the same, and it is not disclosed whether it can be changed. When conducting teaching experiments, it is necessary to change one or more values to verify the authenticity of the experiment. The calorific value calculation formula is: q = Q release / m (solid), where Q represents heat (J), q represents calorific value (J / kg), and m represents the mass of solid fuel (kg). For example: change the amount of m, without changing the amount of distilled water, and finally the calorific value result; change the amount of water, without changing the amount of m, and finally the calorific value result, so as to enable students to observe intuitively.

[0040] In the description of this specification, the descriptions referring to terms such as "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A constant temperature cylinder for detecting the calorific value of coal, comprising a cylinder body and a heat insulation layer arranged inside the cylinder body, and an oxygen bomb is installed inside the cylinder body, characterized in that, A water inlet and outlet is provided on one side of the cylinder body. The water inlet and outlet is connected to a water circuit system. An insulating plate that is vertically slidably connected to the insulating layer is provided at the water inlet and outlet. An opening and closing member fixedly connected to the insulating plate is fixedly connected to the cylinder body. It further includes an adjustment system for controlling the internal volume of the cylinder body; the adjustment system includes an adjustment plate that is vertically slidably matched with the insulating layer. The adjustment plate is made of insulating material. Ball bearings are rotatably matched on both sides of the adjustment plate. A number of power components are provided on the cylinder body. The output shaft of the power component is connected to the adjustment plate. The number of power components is electrically connected to the controller; the controller can start the power components, and the power components drive the adjustment plate to move vertically to push the distilled water up or down, so that the oxygen bomb is immersed in the distilled water.

2. The constant temperature cylinder for detecting the calorific value of coal according to claim 1, characterized in that The water circuit system includes a controller. The controller is electrically connected to a water pump and a suction pump. The water pump is connected to a flow meter. The flow meter is electrically connected to the controller. The flow meter is connected to an electromagnetic reversing valve. The electromagnetic reversing valve is connected to the water inlet and outlet. The electromagnetic reversing valve is connected to both the water pump and the suction pump.

3. The constant temperature cylinder for detecting the calorific value of coal according to claim 2, wherein, The controller is electrically connected to the igniter of the oxygen bomb.

4. The constant temperature cylinder for detecting the calorific value of coal according to claim 3, characterized in that, A driving component is fixedly connected to the cylinder body. An adjusting component is provided on the output shaft of the driving component. The adjusting component is fixedly connected to the adjusting plate. A number of power components are rotatably matched with the cylinder body. The output shafts of the number of power components are slidably matched with the adjusting plate. The driving component is electrically connected to the controller; a number of rotating shafts made of insulating material are provided on the adjusting plate, and a number of stirring groups made of insulating material are provided on the rotating shafts.

5. The constant temperature cylinder for detecting the calorific value of coal according to claim 4, characterized in that, The number of stirring groups are evenly distributed along the axial direction of the rotating shaft. The stirring group includes an inner ring that is rotatably matched with the rotating shaft. A number of blades are fixedly connected to the inner ring along its circumferential direction.

6. The constant temperature cylinder for detecting the calorific value of coal according to claim 5, characterized in that, An annular groove is formed on the rotating shaft. A slider located in the annular groove is provided on the inner ring. The inner ring is rotatably matched with the rotating shaft through the slider and the annular groove.

7. The constant temperature cylinder for detecting the calorific value of coal according to claim 6, characterized in that, A guiding groove is formed on the side wall of the insulating layer. The ball bearings are located in the guiding groove.

8. The constant temperature cylinder for detecting the calorific value of coal according to claim 7, characterized in that, The electromagnetic reversing valve is connected to a pipe whose length is greater than the length of the cylinder body.

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