A high-adhesion type anti-setting gel on-site rapid dissolving spraying device

Abstract

The utility model provides a kind of high adhesion type resistance gel on-site rapid dissolving spraying device, including water tank, water pump, Venturi jet dissolver, slow pressure cavity, double cavity mixing pipe, spraying pump and booster spray gun connected in turn, the throat portion below of Venturi jet dissolver is equipped with suction port, suction port is connected with resistance agent storage tank downward, double cavity mixing pipe is arranged obliquely downward, its both ends and middle are spaced by throttle valve, form upper and lower two chambers, the liquid inlet of two chambers is equipped with feeding port, wherein the feeding port of upper chamber is connected with tackifier storage tank upward, the feeding port of lower chamber is connected with crosslinking agent storage tank upward, and the discharge port of tackifier storage tank, crosslinking agent storage tank and slow pressure cavity is evenly equipped with switch valve, spiral conveying guide vane is arranged in each chamber.The utility model can realize resistance agent from solid powder to high adhesion gel on-site rapid, continuous preparation and spraying, solve the problem of low dissolving efficiency, easy to block, poor adhesion of traditional mode.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mine safety protection equipment, and in particular to a high-adhesion type inhibitory gel rapid on-site dissolution spraying device. Background Technology

[0002] In recent years, with the increasing intensity and depth of coal mining, the problem of spontaneous combustion of coal in mines has become increasingly serious. In critical areas such as vertical coal walls and roadway roofs, where air leakage and oxygen supply are abundant and heat dissipation is difficult, the coal is more prone to oxidation and spontaneous combustion. These areas are uniquely located and difficult to effectively cover; once spontaneous combustion occurs, not only is firefighting difficult, but it can also easily trigger regional fires and secondary disasters, seriously threatening the safety of underground operations. Therefore, efficient fire prevention and extinguishing technologies for vertical coal walls and roadway roofs have become an urgent need in the field of coal mine safety.

[0003] Coal mine fire inhibitors are commonly used to prevent spontaneous combustion of coal. These inhibitors are mainly available in liquid and solid forms. Liquid fire inhibitors are expensive to transport, and their main component is water, making transportation uneconomical. While solid fire inhibitors are convenient to transport, they suffer from problems such as incomplete dissolution, low dissolution efficiency, cumbersome procedures, and easy clogging of pumps and nozzles during on-site dissolution. Furthermore, the viscosity of the fire inhibitor gel prepared on-site is difficult to control, resulting in poor adhesion and dripping when sprayed on vertical coal walls or tunnel roofs, leading to unsatisfactory coverage and affecting fire prevention and extinguishing effectiveness. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model aims to provide a high-adhesion inhibitory gel rapid on-site dissolution and spraying device, so as to realize the rapid and continuous on-site preparation and spraying of inhibitors from solid powder to high-adhesion gel, and solve the problems of low dissolution efficiency, easy clogging and poor adhesion of traditional methods.

[0005] To achieve the above objectives, this utility model proposes a high-adhesion type inhibitory gel rapid on-site dissolution spraying device, comprising a device body, which includes a water tank, a water pump, a Venturi jet dissolver, a pressure-reducing chamber, a dual-chamber mixing pipe, a spray pump, and a pressurized spray gun connected in sequence via connecting pipes. The Venturi jet dissolver has a suction port below its throat, which is connected downward to an inhibitor storage tank. The dual-chamber mixing pipe is arranged at an angle downward, and its two ends and the middle are separated by throttle valves to form upper and lower chambers. Both chambers have feeding ports at their inlet ends. The feeding port of the upper chamber is connected upward to a thickener storage tank, and the feeding port of the lower chamber is connected upward to a crosslinking agent storage tank. Switch valves are distributed at the outlets of the thickener storage tank, the crosslinking agent storage tank, and the pressure-reducing chamber. A spiral conveying guide plate is also distributed in each chamber along the fluid flow direction.

[0006] The above solution also includes a mobile trolley, on which the device body is integrated and mounted, facilitating rapid deployment and flexible operation in the narrow spaces of underground coal mines, meeting the needs for on-site preparation and spraying, and significantly improving the response speed and ease of operation for coal mine spontaneous combustion prevention.

[0007] In the above scheme: the water tank, water pump and inhibitor storage tank are all directly fixed on the mobile trolley. The inhibitor storage tank is connected to the throat of the Venturi jet dissolver through a rigid connecting pipe, and the Venturi jet dissolver is supported. The pressure relief chamber and spray pump are respectively fixed above the mobile trolley through the support bracket. The structure is simple and the arrangement is convenient.

[0008] In the above solution, the connecting pipeline between the spray pump and the booster spray gun is a high-pressure hose. In high-pressure operation scenarios, ordinary hoses often pose safety hazards due to their inability to withstand enormous pressure, and cannot reliably transport liquids or gases. In contrast, high-pressure hoses are specifically designed for high-pressure environments, enabling the safe and stable delivery of various liquid or gaseous media. Furthermore, when the booster spray gun needs to be moved flexibly during operation, the excellent flexibility of the high-pressure hose fully meets this operational requirement, ensuring a smooth and unobstructed spraying process.

[0009] In the above scheme: a pressure regulating valve is also installed on the connecting pipeline of the device body. After the spraying operation is completed, the pressure regulating valve is first adjusted to a low pressure state to release the pipeline pressure. Then, all equipment on the device body is turned off, and the device body is cleaned to ensure that the pipeline, spraying pump and booster spray gun are not blocked, and that the storage tanks, water tanks and pipelines are not corroded.

[0010] The beneficial effects of this utility model are:

[0011] 1. A Venturi jet dissolver is used to achieve rapid and uniform dissolution of solid inhibitors, eliminating the need for mechanical stirring components. This simple structure and low failure rate eliminate the potential risk of electrical sparks from energized systems, effectively avoiding the clumping, sedimentation, and clogging problems common in traditional stirring methods. This significantly improves dissolution efficiency and solution uniformity, ensuring the continuity, stability, and safety of subsequent spraying. 2. A dual-cavity mixing pipe with a spiral conveyor guide plate replaces a smooth pipeline, avoiding uneven mixing of thickeners and crosslinking agents caused by short material contact time and excessive flow rate. A throttling valve regulates the flow rate and precisely adjusts the gelation time and viscosity, achieving stable spraying with balanced inhibitory gel pressure and steady-flow mixing. 3. A pressurized spray gun atomizes the gel-like inhibitory liquid, forming viscous droplets with a certain atomization effect. This ensures uniform spraying and significantly enhances the adhesion of the gel to complex surfaces such as vertical coal walls and tunnel tops, effectively preventing dripping and loss, and improving fire prevention and extinguishing effects. 4. The device has a compact overall structure and high integration. It can be installed on a handcart or mobile platform, which facilitates rapid deployment and flexible operation in the narrow space of underground coal mines. It meets the needs of on-site preparation and spraying, and greatly improves the response speed and ease of operation of coal mine spontaneous combustion prevention. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a high-adhesion inhibitory gel rapid on-site dissolution spraying device.

[0013] Figure 2 This is a schematic diagram of the pressure regulating valve layout.

[0014] Figure 3 This is a partial schematic diagram of a dual-lumen mixing tube. Detailed Implementation

[0015] like Figure 1 As shown in Figure 3, a high-adhesion type inhibitory gel rapid on-site dissolution spraying device mainly consists of the device body and the mobile trolley 14.

[0016] The main body of the device includes a water tank 2, a water pump 3, a Venturi jet dissolver 1, a pressure-relieving chamber 4, a dual-chamber mixing pipe 7, a spray pump 11, and a pressurized spray gun 12, which are connected in sequence through connecting pipes.

[0017] The Venturi jet dissolver 1 has a suction port below its throat, which is connected downward to an inhibitor storage tank 5. The dual-chamber mixing tube 7 is arranged at an angle downward, and its two ends and the middle are separated by throttle valves 6 to form upper and lower chambers. Both chambers have feeding ports at their inlet ends. The feeding port of the upper chamber is connected upward to a thickener storage tank 9, and the feeding port of the lower chamber is connected upward to a crosslinking agent storage tank 10. The outlets of the thickener storage tank 9, the crosslinking agent storage tank 10, and the pressure-reducing chamber 4 are all equipped with switching valves. Each chamber is also equipped with a spiral conveying guide plate 13 (the spiral conveying guide plate 13 is mainly composed of a central column and spiral blades) along the fluid flow direction.

[0018] The device is integrated and mounted on a mobile trolley 14, which facilitates rapid deployment and flexible operation in the narrow space of underground coal mines, meets the needs of on-site preparation and spraying, and greatly improves the response speed and ease of operation of coal mine spontaneous combustion prevention.

[0019] Specifically, the water tank 2, water pump 3 and inhibitor storage tank 5 are all directly fixed on the mobile trolley 14. The inhibitor storage tank 5 is connected to the throat of the Venturi jet dissolver 1 through a rigid connecting pipe, and lifts the Venturi jet dissolver 1. The pressure relief chamber 4 and spray pump 11 are respectively fixed above the mobile trolley 14 through the lifting bracket. The structure is simple and the arrangement is convenient.

[0020] Ideally, the connection between the spray pump 11 and the booster spray gun 12 should be a high-pressure hose. In high-pressure operation scenarios, ordinary hoses often pose safety hazards due to their inability to withstand enormous pressure, and cannot reliably transport liquids or gases. In contrast, high-pressure hoses are specifically designed for high-pressure environments, enabling the safe and stable delivery of various liquid or gaseous media. Furthermore, the excellent flexibility of the high-pressure hose fully meets the operational requirements when the booster spray gun 12 needs to be moved flexibly during operation, ensuring a smooth and unobstructed spraying process.

[0021] A method for rapid on-site dissolution and spraying of highly adhesive inhibitory gel, based on the aforementioned device for rapid on-site dissolution and spraying of highly adhesive inhibitory gel, comprises the following steps:

[0022] S1. Add water to water tank 2, fill solid inhibitor powder into inhibitor storage tank 5, fill tackifier storage tank 9 with tackifier, and fill crosslinking agent storage tank 10 with crosslinking agent.

[0023] S2. Turn on the water pump 3 to pump the water in the water tank 2 to the inlet end of the Venturi jet dissolver 1. The water flow increases as it passes through the converging section of the Venturi jet dissolver 1. When the water reaches its throat, the flow rate reaches its peak. At this time, a negative pressure zone is formed in the throat. The negative pressure draws the solid inhibitor powder into the water flow through the suction port in the throat and mixes with the water flow instantly to achieve dissolution.

[0024] S3. After the solid inhibitor powder is fully mixed with the water, it flows forward and enters the pressure-reducing chamber 4. This temporarily stores the inhibitory liquid, which has been fully mixed in the Venturi jet dissolver 1, ensuring that the pressure difference across the Venturi jet dissolver 1 is not affected by changes in the flow rate of the inhibitory liquid in the downstream pipeline. This allows the solid inhibitor powder to be continuously and stably drawn into the Venturi jet dissolver 1. When the inhibitory liquid reaches a certain level, the valve of the pressure-reducing chamber 4 is opened, and the inhibitory liquid flows into the dual-chamber mixing tube 7 by gravity.

[0025] S4. Adjust the throttle valve 6 before the first chamber to allow the inhibitory liquid to enter the first chamber at a stable flow rate and volume. When it flows through the first chamber, open the switch valve of the thickener storage tank 9. The thickener inside the tank enters the first chamber and mixes with the inhibitory liquid to form the first mixture. The first mixture moves forward under the action of gravity and collides and rolls with the spiral conveyor guide plate 13 for thorough mixing. At this time, the throttle valve before the second chamber is closed. The first mixture in the first chamber stays for 10-15 seconds, and the thickener is completely dissolved to form a low-viscosity inhibitory base liquid.

[0026] Then, adjust the throttle valve 6 before the second chamber to allow the inhibitory base liquid to enter the second chamber at a stable flow rate and volume. When it flows through the second chamber, open the switch valve of the crosslinking agent storage tank 10, and the crosslinking agent inside it enters the second chamber and mixes with the inhibitory base liquid to form a second mixture. The second mixture moves forward under the action of gravity and collides and rolls with the spiral conveyor guide plate 13 for thorough mixing. At this time, the throttle valve 6 at the end of the dual-chamber mixing pipe 7 is closed, and the second mixture stays in the second chamber for 8-12 seconds. After thorough mixing, a high-viscosity adhesive inhibitory gel is formed.

[0027] S5. Open the throttle valve 6 at the end of the dual-chamber mixing pipe 7 and simultaneously turn on the spray pump 11 to pump the inhibitory gel flowing out of the dual-chamber mixing pipe 7 to the booster spray gun 12. The booster spray gun 12 sprays the gel-like inhibitory liquid to the target position. The booster spray gun 12 can atomize the gel-like inhibitory liquid into viscous droplets, which then adhere to the surface of the coal body.

[0028] Ideally, a pressure regulating valve 8 should also be installed on the connecting pipeline of the device body. After the spraying operation is completed, the pressure regulating valve 8 should be adjusted to a low pressure state to release the pipeline pressure. Then, all equipment on the device body should be shut down and the device body should be cleaned to ensure that the pipeline, spray pump 11 and booster spray gun 12 are not blocked and that the storage tanks, water tanks 2 and pipelines are not corroded.

Claims

1. A high-adhesion inhibitory gel rapid on-site dissolution spraying device, comprising a device body, characterized in that: The main body of the device includes a water tank (2), a water pump (3), a Venturi jet dissolver (1), a pressure-relieving chamber (4), a dual-chamber mixing pipe (7), a spray pump (11), and a pressurizing spray gun (12) connected in sequence by connecting pipes. The Venturi jet dissolver (1) has a suction port below its throat. The suction port is connected downward to an inhibitor storage tank (5). The dual-chamber mixing pipe (7) is arranged inclined downward. Its two ends and the middle are separated by a throttle valve (6) to form upper and lower chambers. The inlet end of each chamber is provided with a feeding port. The feeding port of the upper chamber is connected upward to a thickener storage tank (9), and the feeding port of the lower chamber is connected upward to a crosslinking agent storage tank (10). The outlets of the thickener storage tank (9), the crosslinking agent storage tank (10), and the pressure-relieving chamber (4) are all provided with switch valves. Each chamber is also provided with a spiral conveying guide plate (13) along the fluid flow direction.

2. The high-adhesion type inhibitory gel rapid on-site dissolution spraying device according to claim 1, characterized in that: It also includes a mobile trolley (14), on which the device body is integrated and mounted.

3. The on-site rapid dissolution spraying device for high adhesion type inhibitory gel according to claim 2, characterized in that: The water tank (2), water pump (3) and inhibitor storage tank (5) are all directly fixed on the mobile trolley (14). The inhibitor storage tank (5) is connected to the throat of the Venturi jet dissolver (1) through a rigid connecting pipe and lifts the Venturi jet dissolver (1). The pressure relief chamber (4) and spray pump (11) are respectively fixed above the mobile trolley (14) through the lifting bracket.

4. The on-site rapid dissolution spraying device for high adhesion type inhibitory gel according to claim 1, characterized in that: The connection between the spray pump (11) and the booster spray gun (12) is a high-pressure hose.

5. The on-site rapid dissolution spraying device for high adhesion type inhibitory gel according to claim 1, characterized in that: A pressure regulating valve (8) is also installed on the connecting pipe of the device body.

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