Gas expansion energy automatic testing device with constant temperature function

Abstract

The utility model relates to an automatic gas expansion energy testing device with a constant temperature function, which comprises a gas input unit and an expansion energy testing unit, the expansion energy testing unit comprises a gas reaction kettle, the gas reaction kettle is communicated with the gas input unit through a pipeline, and the automatic gas expansion energy testing device further comprises a constant temperature assembly, the constant temperature assembly comprises a heater, a first temperature sensor, a cooling device and a control terminal, the heater is a water bath box, the water bath box is filled with liquid, the gas reaction kettle is placed in the water bath box, the first temperature sensor is installed in the gas reaction kettle, and the cooling device is installed in the gas reaction kettle. The cooling device is arranged at one end, close to the gas reaction kettle, of the pipeline, and the control terminal is in signal connection with the heater, the first temperature sensor and the cooling device. The utility model aims to solve or at least alleviate the problem that the current gas expansion energy tester cannot carry out dynamic temperature regulation and control, and provides an automatic gas expansion energy testing device with a constant temperature function.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas expansion energy testing equipment, in particular to a gas expansion energy automatic testing device with a constant temperature function. Background Art

[0002] Coal and gas outbursts are common and serious dynamic hazards in coal mines. Key factors influencing their occurrence include ground stress, gas pressure, and coal strength. The release of gas expansion energy is a key energy source during coal and gas outbursts, and its magnitude directly affects the energy released and the hazard level during the outburst. Therefore, measuring gas expansion energy is crucial for predicting and preventing coal and gas outbursts.

[0003] Existing gas expansion energy tests are typically conducted at a constant temperature (such as 30°C). However, in actual underground coal seams, temperature changes significantly with increasing depth, and temperature differences in different geological environments can lead to differences in gas expansion energy within the coal. Test results under a single temperature condition are difficult to fully reflect the actual situation in the complex underground environment. Research has shown that the gas adsorption capacity and expansion energy of coal bodies under different temperature conditions show significant differences. Therefore, testing the gas expansion energy under different temperature conditions is important for accurately assessing the risk of coal and gas outbursts.

[0004] However, most current gas expansion energy testers fail to effectively account for the impact of temperature changes on test results, making it impossible to dynamically adjust the temperature. Experiments typically employ fixed-temperature testing methods, lacking the means to measure at varying temperatures. This results in test results that fail to reflect the actual gas expansion behavior of underground coal seams. Furthermore, existing temperature control units fail to precisely regulate temperature during experiments, particularly during endothermic and exothermic reactions. This inability to maintain a constant temperature in the test system compromises the accuracy of the expansion energy test.

[0005] Therefore, there is an urgent need for a gas expansion energy tester that can automatically adjust under different temperature conditions to achieve accurate measurement of the gas expansion energy of coal under changing temperatures, ensure that the test results are closer to the actual underground environment, and provide a more reliable basis for coal mine safety production. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, solve or at least alleviate the problem that current gas expansion energy testers are unable to perform dynamic temperature control, and provide a gas expansion energy automatic testing device with a constant temperature function.

[0007] The utility model is realized through the following technical solutions:

[0008] A gas expansion energy automatic testing device with a constant temperature function includes a gas input unit and an expansion energy testing unit. The expansion energy testing unit includes a gas reactor connected to the gas input unit via a pipeline. The constant temperature component includes a heater, a first temperature sensor, a cooling device, and a control terminal.

[0009] The heater is a water bath filled with liquid, the gas reactor is placed in the water bath, the first temperature sensor is installed in the gas reactor, the cooling device is arranged at one end of the pipeline close to the gas reactor, and the control terminal is signal-connected to the heater, the first temperature sensor and the cooling device.

[0010] In order to further realize the present invention, the following technical solutions may be preferably selected:

[0011] Preferably, the constant temperature component further includes a second temperature sensor, which is disposed in the water bath and is used to monitor the operating temperature of the heater.

[0012] Preferably, the control terminal controls the opening and closing of the heater and the cooling device through a first temperature sensor, and controls the operating temperature of the heater through a second temperature sensor.

[0013] Preferably, the control terminal is provided with a set value of the test temperature, the set value is A, the temperature value monitored by the first temperature sensor is α, and the operating temperature value of the heater is B. The specific configuration of the control terminal is:

[0014] When α<0.75A, the heater is turned on and B﹦A, and the cooling device is closed;

[0015] When 0.75A≤α≤A, the heater is turned on and B﹦A, and the cooling device is closed;

[0016] When A<α≤1.2A, the heater is turned on and B﹦A, the cooling device is turned on;

[0017] When 1.2A<α, the heater is closed and the cooling device is turned on.

[0018] Preferably, a pressure control component is provided between the gas input unit and the expansion energy testing unit. The pressure control component is provided at one end of the pipeline close to the gas input unit. The pressure control component includes a back pressure valve, a buffer tank and a loading pump. The back pressure valve is installed in the pipeline, the loading pump is connected to the back pressure valve, and the buffer tank is provided between the loading pump and the back pressure valve.

[0019] Through the above technical solution, the beneficial effects of the utility model are:

[0020] The first temperature sensor of this utility model monitors the real-time temperature within the gas reactor during the experiment. The control terminal receives the temperature signal from the first temperature sensor and automatically controls the operating status of the heater and cooling device based on temperature changes. By adjusting the operation of the heater and cooling device, the control terminal ensures that the temperature remains within the preset constant temperature during the experiment, avoiding temperature fluctuations caused by endothermic or exothermic reactions during the experiment.

[0021] During the gas expansion energy test, a water bath is used to heat and insulate the gas reactor. While a water bath offers the advantage of maintaining a constant temperature, making it easier to maintain the temperature within the gas reactor at the set value, it heats up slowly and cools down even more slowly, making it difficult to regulate in real time. The present invention, on the other hand, uses a cooling device to cool the gas entering the gas reactor, allowing the cooled gas to enter the reactor and thereby regulating the temperature within the reactor. This prevents real-time temperature fluctuations caused by endothermic or exothermic reactions during the experiment, ensuring that the temperature within the gas reactor is always maintained at the set value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Among them: 1-gas input unit; 2-gas reactor; 3-heater; 4-first temperature sensor; 5-cooling device; 6-second temperature sensor; 7-back pressure valve; 8-buffer tank; 9-loading pump. DETAILED DESCRIPTION

[0024] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the following terms in this utility model in specific contexts.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0026] Example 1:

[0027] like Figure 1As shown, a gas expansion energy automatic testing device with a constant temperature function includes a gas input unit 1 and an expansion energy testing unit. The expansion energy testing unit includes a gas reactor 2, which is connected to the gas input unit 1 through a pipeline. It is characterized in that it also includes a constant temperature component, which includes a heater 3, a first temperature sensor 4, a cooling device 5 and a control terminal.

[0028] The heater 3 is a water bath filled with liquid, the gas reactor 2 is placed in the water bath, the first temperature sensor 4 is installed in the gas reactor 2, and the cooling device 5 is arranged at one end of the pipeline close to the gas reactor 2. The control terminal is signal-connected to the heater 3, the first temperature sensor 4 and the cooling device 5.

[0029] In order to optimize the product structure, the constant temperature component further includes a second temperature sensor 6 , which is disposed in the water bath and is used to monitor the operating temperature of the heater 3 .

[0030] In this embodiment, the control terminal controls the opening and closing of the heater 3 and the cooling device 5 through the first temperature sensor 4 , and controls the operating temperature of the heater 3 through the second temperature sensor 6 .

[0031] The control terminal is provided with a set value of the test temperature, the set value is A, the temperature value monitored by the first temperature sensor 4 is α, and the operating temperature value of the heater 3 is B. The specific configuration of the control terminal is:

[0032] When α<0.75A, the heater 3 is turned on and B>1.2-1.5A, and the cooling device 5 is closed;

[0033] When 0.75A≤α≤A, the heater 3 is turned on and B>A, and the cooling device 5 is closed;

[0034] When A<α≤1.2A, the heater 3 is turned on and B>A, the cooling device 5 is turned on;

[0035] When 1.2A<α, the heater 3 is turned off and the cooling device 5 is turned on.

[0036] In order to ensure that the gas input into the gas reactor 2 is maintained at a set constant pressure, a pressure control component is arranged between the gas input unit 1 and the expansion energy testing unit. The pressure control component is arranged at one end of the pipeline close to the gas input unit 1. The pressure control component includes a back pressure valve 7, a buffer tank 8 and a loading pump 9. The back pressure valve 7 is installed in the pipeline, the loading pump 9 is connected to the back pressure valve 7, and the buffer tank 8 is arranged between the loading pump 9 and the back pressure valve 7.

[0037] The first temperature sensor 4 of the present invention monitors the real-time temperature within the gas reactor 2 during the experiment. The control terminal receives the temperature signal from the first temperature sensor 4 and automatically controls the operating states of the heater 3 and the cooling device 5 based on temperature fluctuations. By adjusting the operation of the heater 3 and the cooling device 5, the control terminal ensures that the temperature remains within a preset constant temperature during the experiment, avoiding temperature fluctuations caused by endothermic or exothermic reactions during the experiment. This ensures that the experiment is conducted under constant temperature conditions and guarantees the accuracy of the gas expansion energy test.

[0038] During the gas expansion energy test, the gas reactor 2 is heated and insulated using a water bath. While a water bath offers the advantage of maintaining a constant temperature, it is easier to maintain the temperature within the gas reactor 2 at the set value. However, a water bath heats up slowly and cools down even more slowly, making real-time regulation difficult. The present invention, however, uses a cooling device 5 to cool the gas entering the gas reactor 2, allowing the cooled gas to enter the gas reactor 2 and thereby regulating the temperature within the gas reactor 2. This prevents real-time temperature fluctuations caused by endothermic or exothermic reactions during the test, ensuring that the temperature within the gas reactor 2 is consistently maintained at the set value.

[0039] The pressure control unit ensures a constant pressure experimental environment. This unit monitors the gas pressure in the experimental gas reactor 2 via a pressure sensor and feeds the measured pressure value back to the control terminal, which adjusts the gas input and output according to the experimental requirements. When the pressure falls below the set value, the unit automatically adjusts the gas input to reach the desired pressure. When the pressure is too high, the unit releases excess pressure to maintain pressure stability during the experiment. This ensures that gas enters the expansion energy test unit under constant pressure conditions, thereby improving the accuracy and consistency of experimental data.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas expansion energy automatic testing device with a constant temperature function, comprising a gas input unit (1) and an expansion energy testing unit, wherein the expansion energy testing unit comprises a gas reactor (2), and the gas reactor (2) is connected to the gas input unit (1) through a pipeline, characterized in that: It also includes a constant temperature component, which includes a heater (3), a first temperature sensor (4), a cooling device (5) and a control terminal; The heater (3) is a water bath filled with liquid, the gas reactor (2) is placed in the water bath, the first temperature sensor (4) is installed in the gas reactor (2), the cooling device (5) is arranged at one end of the pipeline close to the gas reactor (2), and the control terminal is signal-connected with the heater (3), the first temperature sensor (4) and the cooling device (5).

2. The automatic gas expansion energy testing device with constant temperature function according to claim 1, characterized in that: The constant temperature component further comprises a second temperature sensor (6), which is arranged in the water bath and is used to monitor the operating temperature of the heater (3).

3. The automatic gas expansion energy testing device with constant temperature function according to claim 2, characterized in that: The control terminal controls the opening and closing of the heater (3) and the cooling device (5) through a first temperature sensor (4), and controls the operating temperature of the heater (3) through a second temperature sensor (6).

4. The automatic gas expansion energy testing device with constant temperature function according to claim 3, characterized in that: The control terminal is provided with a set value of the test temperature, the set value is A, the temperature value monitored by the first temperature sensor (4) is α, and the operating temperature value of the heater (3) is B. The specific configuration of the control terminal is: When α<0.75A, the heater (3) is turned on and B>(1.2-1.5)A, and the cooling device (5) is closed; When 0.75A≤α≤A, the heater (3) is turned on and B>A, and the cooling device (5) is closed; When A<α≤1.2A, the heater (3) is turned on and B﹦A, the cooling device (5) is turned on; When 1.2A<α, the heater (3) is closed and the cooling device (5) is turned on.

5. The automatic gas expansion energy testing device with constant temperature function according to claim 1, characterized in that: A pressure control assembly is provided between the gas input unit (1) and the expansion energy test unit. The pressure control assembly is provided at one end of the pipeline close to the gas input unit (1). The pressure control assembly comprises a back-pressure valve (7), a buffer tank (8) and a loading pump (9). The back-pressure valve (7) is installed in the pipeline, the loading pump (9) is connected to the back-pressure valve (7), and the buffer tank (8) is provided between the loading pump (9) and the back-pressure valve (7).

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