An intrinsically safe hot water circulation antifreeze and insulation device for coal mine pipelines

Abstract

This invention provides an intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines, specifically relating to the field of equipment antifreeze technology. The insulation device includes a control system, a storage tank, and an insulation pipe. The outlet of the storage tank is connected to the inlet of a circulation pump via a supply pipe; the outlet of the circulation pump is connected to the medium inlet of a heater via an inlet pipe; the medium outlet of the heater is connected to the inlet side of the insulation pipe; and the outlet side of the insulation pipe is connected to the inlet of the storage tank via a return pipe. This invention constructs a closed-loop circulation circuit using warm water as the heat medium, eliminating safety hazards such as electric shock due to insulation aging of electric heating tape and coal dust ignition. Simultaneously, relying on physical fluid heat exchange, the pipeline provides uniform and stable heating throughout, resulting in greater reliability. The gas supply pipeline and heat exchange components are arranged in an open layout, making fault locations readily visible and allowing for maintenance without large-scale dismantling, significantly reducing maintenance difficulty and labor costs.

Description

Technical Field

[0001] This invention patent relates to the field of equipment antifreeze technology, specifically to an intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines. Background Technology

[0002] In coal mine washing and beneficiation processes, various pneumatic valves in filter press workshops generally rely on compressed air as their power source. In the low-temperature, frigid conditions of winter, compressed air supply pipelines are highly susceptible to freezing, especially those laid in the open, in low-lying, water-accumulating areas, and in recessed pipeline structures crossing railway lines. The water vapor carried by the compressed air inside the pipeline continuously condenses and accumulates in low-lying areas, rapidly freezing and blocking the pipeline in low-temperature conditions.

[0003] Traditional antifreeze solutions in the industry generally employ a heating and antifreeze method using electric heating tape with an external insulation layer. However, long-term application of this method in coal mines has revealed several significant shortcomings: 1. Significant safety risks: Underground mines and coal washing plants are flammable and explosive working environments involving coal. Electric heating cables are constantly exposed to moisture and dust, and their insulation sheaths are prone to aging and damage, easily leading to leakage and short circuits. This poses significant safety hazards, including electric shock and fires caused by igniting coal dust. 2. High maintenance and repair difficulty: The electric heating pipelines are completely encased in insulation, making fault locations difficult to pinpoint. Troubleshooting and repair require extensive removal of the insulation layer, resulting in complex procedures, high labor costs, and low maintenance efficiency. 3. Insufficient operational stability: A single section of localized electric heating failure can cause ice blockage in the corresponding pipe section, directly leading to interruption of compressed air supply, malfunction of pneumatic valves in the filter press system, and in extreme cases, pipe freezing and cracking, forcing unplanned shutdowns of the entire coal washing equipment. This significantly reduces coal washing production efficiency, causes substantial economic losses, and severely restricts the stable and safe operation of the site. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an intrinsically safe hot water circulation antifreeze and insulation device for coal mine pipelines, the specific technical solution of which is as follows: An intrinsically safe hot water circulation antifreeze and insulation device for coal mine pipelines includes a control system, a liquid storage tank, and an insulation pipe; the outlet of the liquid storage tank is connected to the inlet of a circulation pump via a supply pipe; the outlet of the circulation pump is connected to the medium inlet of a heater via an inlet pipe; the medium outlet of the heater is connected to the inlet side of the insulation pipe; and the outlet side of the insulation pipe is connected to the inlet of the liquid storage tank via a return pipe.

[0005] Preferably, the control system integrates a temperature sensor, a temperature controller, and an electrical control box with leakage protection function.

[0006] Preferably, both the circulating pump and the heater are electrically connected to the control system.

[0007] Preferably, the insulation pipe is spirally and tightly wound around the outer surface of the gas supply pipe.

[0008] Preferably, the gas supply pipe, which is wrapped with an insulating pipe, is also covered with an insulating material layer.

[0009] Preferably, the circulating heat medium in the liquid storage tank is water.

[0010] More preferably, the insulation pipe is made of heat-resistant plastic tubing.

[0011] The beneficial effects of this invention are: 1. This invention adopts a closed-loop fluid circulation structure, which drives hot water to circulate in the insulated pipeline through a circulation pump, continuously and evenly heating the gas supply pipeline, effectively preventing moisture in the compressed air from freezing in the gas supply pipeline; it completely abandons the traditional electric heat tracing heating solution, eliminating major safety hazards such as leakage and electric shock, coal dust ignition and fire caused by insulation aging of electric heat tracing tape from the root. 2. The gas supply pipeline and heat exchange components of this invention adopt an open layout, making the fault location intuitive and visible. Maintenance work can be carried out without large-scale dismantling, which greatly reduces the difficulty of operation and maintenance and labor costs. Attached Figure Description

[0012] The accompanying drawings constituting this invention are provided to further understand this application and do not constitute an undue limitation of this application.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; In the diagram, 1-liquid storage tank; 101-liquid supply pipe; 102-liquid return pipe; 2-circulation pump; 201-liquid inlet pipe; 3-heater; 4-insulation pipe; 5-gas supply pipe; 6-insulation material layer. Detailed Implementation

[0014] The specific implementation of the intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines provided by the present invention will be further described with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, an intrinsically safe hot water circulation antifreeze and insulation device for coal mine pipelines includes a control system (not shown in the figure), a liquid storage tank 1, and an insulation pipe 4. The outlet of the liquid storage tank 1 is connected to the inlet of the circulation pump 2 through a liquid supply pipe 101. The outlet of the circulation pump 2 is connected to the medium inlet of the heater 3 through a liquid inlet pipe 201. The medium outlet of the heater 3 is connected to the inlet side of the insulation pipe 4. The outlet side of the insulation pipe 4 is connected to the inlet of the liquid storage tank 1 through a return pipe 102.

[0016] Preferably, the control system integrates a temperature sensor, a temperature sensor, and an electrical control box with leakage protection function, used to control the start and stop of the insulation device and temperature regulation.

[0017] It is worth noting that both the circulating pump 2 and the heater 3 are electrically connected to the control system. The temperature sensor collects and detects temperature data in real time and transmits the temperature signal to the temperature controller, providing data for the start-up and shutdown control of the circulating pump 2 and the heater 3.

[0018] Preferably, the insulation pipe 4 is spirally and tightly wound around the outer surface of the gas supply pipe 5 to achieve uniform insulation of the gas supply pipe 5.

[0019] Preferably, the gas supply pipe 5, which is wrapped with the insulation pipe 4, is further covered with an insulation material layer 6. The insulation material layer 6 is preferably made of heat-insulating cotton to reduce heat loss.

[0020] Preferably, the circulating heat medium in the storage tank 1 is water, which is low in cost, non-flammable and non-explosive, and has excellent heat exchange performance.

[0021] More preferably, the insulation pipe 4 is made of heat-resistant plastic tubing.

[0022] When heating and insulation of the gas supply pipeline 5 is required, the control system starts the circulation pump 2 and the heater 3. The water in the storage tank 1 is driven by the circulation pump 2 into the heater 3 for heating. The hot fluid is pumped into the insulation pipe 4 wrapped around the outside of the gas supply pipeline 5. The circulating hot water continuously heats the gas supply pipeline 5, preventing the moisture in the compressed air from freezing inside the pipeline. At the same time, the temperature sensor collects the temperature of the circulating water in the insulation pipe 4 in real time and transmits the detection signal to the temperature controller. The temperature controller controls the heater 3 to start and stop according to the set temperature value and keeps the water in the insulation pipe 4 stably at the target temperature, continuously providing heat tracing and insulation for the gas supply pipeline 5. When it is necessary to stop the heat supply and insulation, the heater 3 is turned off. After the return water that has completed heat exchange in the insulation pipe 4 is pumped back to the storage tank 1, the circulation pump 2 is turned off.

[0023] This invention constructs a closed-loop circulation system using warm water as the heat transfer medium, eliminating safety hazards such as electric shock due to insulation aging of electric heating tape and fire caused by coal dust ignition. Simultaneously, relying on physical fluid heat exchange, the entire pipeline provides uniform and stable heating, enhancing reliability. Both the gas supply pipeline and heat exchange components are laid out in an open manner, making fault locations readily visible and allowing for maintenance without extensive dismantling, significantly reducing maintenance difficulty and labor costs.

[0024] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any particular component or element in this invention, nor should they be construed as limiting the invention. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of the above terms in this invention based on the specific circumstances, and they should not be construed as limiting the invention.

[0025] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An intrinsically safe hot water circulation antifreeze and heat preservation device for coal mine pipelines, characterized in that, Includes the control system, liquid storage tank, and insulation pipe; The outlet of the storage tank is connected to the inlet of the circulation pump via a supply pipe; the outlet of the circulation pump is connected to the medium inlet of the heater via an inlet pipe; the medium outlet of the heater is connected to the inlet side of the insulation pipe; and the outlet side of the insulation pipe is connected to the inlet of the storage tank via a return pipe.

2. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 1, characterized in that, The control system integrates a temperature sensor, a temperature controller, and an electrical control box with leakage protection.

3. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 2, characterized in that, Both the circulating pump and the heater are electrically connected to the control system.

4. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 1, characterized in that, The insulation pipe is spirally and tightly wound around the outer surface of the gas supply pipe.

5. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 4, characterized in that, The gas supply pipe, which is wrapped with an insulating pipe, is also covered with an insulating material layer.

6. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 1, characterized in that, The circulating heat medium in the storage tank is water.

7. The intrinsically safe warm water circulation antifreeze and insulation device for coal mine pipelines according to claim 4, characterized in that, The insulation pipe is made of heat-resistant plastic tubing.

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