Intelligent spraying system for stopping agent in coal mine goaf

Abstract

The utility model belongs to the technical field of coal mine fire prevention, and particularly relates to a coal mine goaf stopping agent intelligent spraying system which comprises a premixing tank, a buffer tank, a driving pump, a density detection unit, a liquid level detection unit, a spraying device and an electromagnetic valve set, and the driving pump, the density detection unit, the liquid level detection unit, the spraying device and the electromagnetic valve set are electrically connected with a controller. The premixing tank is communicated with the buffer tank through the driving pump, the buffer tank is communicated with the electromagnetic valve group through the driving pump, the density detection units are respectively positioned between the premixing tank and the spraying device and between the buffer tank and the spraying device, and the liquid level detection units are respectively positioned on the premixing tank and the buffer tank. And the controller is used for controlling the operation states of the spraying device, the driving pump and the electromagnetic valve group according to a density detection signal of the density detection unit and a liquid level detection signal of the liquid level detection unit. The device can solve the problem that the concentration of the inhibitor solution is uncontrollable in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine fire prevention, in particular to an intelligent spraying system for inhibitors in coal mine goaf areas. Background Art

[0002] Coal mine goaf generally refers to the void or cavity filled with collapsed coal and rock left after underground coal mining is completed during coal mining operations, and goaf fire prevention and extinguishing equipment generally refers to fire prevention and fire extinguishing equipment used in various spontaneous combustion fire scenarios. This type of equipment has a wide range of application scenarios.

[0003] The equipment for fire prevention in coal mine goafs generally adopts the method of spraying inhibitors for fire prevention. In the prior art, the inhibitor equipment generally adopts hydraulic stirring to prepare the inhibitor. The water pipe is fixed to the inhibitor mixing barrel, and the inhibitor solution is prepared by flushing with water. After the preparation is completed, the operator holds the spray pipe or fixes the spray pipe above the coal mine goaf to perform fire prevention and extinguishing operations. This method has the problem of uncontrollable concentration of the inhibitor solution. Utility Model Content

[0004] The technical problem solved by the utility model is to provide an intelligent spraying system for inhibitor in coal mine goaf to solve the problem of uncontrollable concentration of inhibitor solution in the prior art.

[0005] The basic solution provided by the utility model: a coal mine goaf area inhibitor intelligent spraying system, including a premixing tank, a buffer tank, a driving pump, a density detection unit, a liquid level detection unit, a spraying device, a solenoid valve group and a controller, wherein the driving pump, the density detection unit, the liquid level detection unit, the spraying device and the solenoid valve group are all electrically connected to the controller;

[0006] The premixing tank and the buffer tank are connected via a driving pump, the buffer tank and the electromagnetic valve group are connected via a driving pump, the density detection unit is respectively located between the premixing tank and the spraying device and between the buffer tank and the spraying device, the liquid level detection unit is respectively located on the premixing tank and the buffer tank, and the controller is used to control the operating states of the spraying device, the driving pump and the electromagnetic valve group according to the density detection signal of the density detection unit and the liquid level detection signal of the liquid level detection unit.

[0007] Furthermore, the driving pump includes a premix liquid pump and an inhibitor pump. The premix liquid pump is connected to the outlet of the premix tank, and is connected to the premix tank through a first premix branch to form a loop, and is connected to the inlet of the buffer tank through a second premix branch. One end of the inhibitor pump is connected to the buffer tank, and the other end is connected to the solenoid valve group. The other end of the solenoid valve group is connected to an external spraying device.

[0008] Furthermore, the spray device includes a spray water inlet pipe, a buffer tank water inlet pipe, a water inlet main pipe, a regulating valve 1 and a regulating valve 2. One end of the spray water inlet pipe is connected to the water inlet main pipe, and the other end extends into the premixing tank. One end of the buffer tank water inlet pipe is connected to the water inlet main pipe, and the other end extends into the buffer tank. The regulating valve 1 and the regulating valve 2 are electrically connected to the controller. The regulating valve 1 is located on the spray water inlet pipe, and the regulating valve 2 is located on the buffer tank water inlet pipe. The controller is also used to control the operating status of the regulating valve 1 and the regulating valve 2.

[0009] Furthermore, the density detection unit includes a density meter 1 and a density meter 2, the density meter 1 is installed on the first premixing branch pipe, and the density meter 2 is installed on the top of the buffer tank. The controller controls the operating state of the regulating valve 1 according to the detection signal of the density meter 1, and the controller is also used to control the operating state of the regulating valve 2 according to the detection signal of the density meter 2.

[0010] Furthermore, the liquid level detection unit includes a liquid level gauge 1 and a liquid level gauge 2, the liquid level gauge 1 is installed on the lower side of the premixing tank, and the liquid level gauge 2 is installed on the lower side of the buffer tank. The controller is used to control the opening and closing state of the regulating valve 1 according to the detection signal of the liquid level gauge 1, and the controller is also used to control the operating state of the catalytic converter pump according to the detection signal of the liquid level gauge 2.

[0011] Furthermore, it also includes a premix liquid pump pressure gauge and an inhibitor pump pressure gauge, wherein the premix liquid pump pressure gauge is installed on the premix liquid pump, and the inhibitor pump pressure gauge is installed on the inhibitor pump.

[0012] Furthermore, it also includes a stirring unit, which includes a stirring motor and an agitator. The stirring motor is respectively installed on the top of the premixing tank and the buffer tank. The agitator is installed on the driving shaft of the stirring motor and extends into the premixing tank and the buffer tank. The stirring motor is electrically connected to the controller, and the controller is also used to control the starting state of the stirring motor.

[0013] Furthermore, it also includes a flow meter, which is located between the inhibitor pump and the solenoid valve group.

[0014] The principle and advantage of the utility model are as follows: in this application, in view of the continuous development trend of intelligent coal mines, this application focuses on unmanned and less-manned intelligent spraying of inhibitors. Therefore, by preparing high-concentration saturated solutions and suspensions, more inhibitors can be accommodated in a storage tank of the same volume. At the same time, because the time interval for human transportation and intervention is relatively long, by storing a high-concentration inhibitor solution (mass concentration of 50% to 70%) and part of the suspension in a premixing tank, the solid inhibitor is converted into an inhibitor solution, which can better perform precise metering and intelligent operation. By mixing the inhibitor solution in the premixing tank and water again in a buffer tank, an inhibitor solution (mass concentration of 10% to 20%) that meets the use requirements can be obtained.

[0015] Inhibitor solutions of different mass concentrations have different densities. Density and mass concentration have a one-to-one correspondence. The mass concentration can be obtained through the density. Densitometers are cheap, and calculating the mass concentration through density has a better cost-effectiveness.

[0016] The inhibitor in the premixing tank is not completely dissolved, and the mass concentration of the inhibitor in the premixing tank is uneven. Therefore, a density meter 1 is set on the liquid outlet pipe of the premixing tank. The inhibitor solution in the buffer tank is mixed evenly, so a density meter 2 is installed in the buffer tank. Finally, according to the required inhibitor concentration, the liquid level meter 1 in the premixing tank can tell whether to continue adding water to the premixing tank or stop adding water. At the same time, according to the required inhibitor concentration and the density meter 2 in the buffer tank, it can be known whether water or a high-concentration inhibitor solution needs to be added to the buffer tank.

[0017] Therefore, the utility model can realize controllable concentration of the inhibitor solution sprayed into the goaf. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 This is a functional block diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The marks in the drawings of the specification include: premixing tank 1, first premixing branch 101, second premixing branch 102, buffer tank 2, premixing liquid pump 3, inhibitor pump 4, density meter one 5, density meter two 6, liquid level meter one 7, liquid level meter two 8, spray device 9, spray water inlet pipe 901, buffer tank water inlet pipe 902, water inlet main pipe 903, regulating valve one 904, regulating valve two 905, premixing liquid pump pressure gauge 10, inhibitor pump pressure gauge 11, flow meter 12, solenoid valve group 13, stirring unit 14, stirring motor 1401, stirrer 1402.

[0022] The embodiment is basically as follows Figure 1 and Figure 2 As shown: the intelligent spraying system of inhibitor in coal mine goaf includes a premixing tank 1, a buffer tank 2, a driving pump, a density detection unit, a liquid level detection unit, a spray device 9, an electromagnetic valve group 13, a stirring unit 14 and a controller, wherein the driving pump, the density detection unit, the liquid level detection unit, the spray device 9, the electromagnetic valve group 13 and the stirring unit 14 are all electrically connected to the controller.

[0023] Specifically, a stirring unit 14 is installed on the top of the premixing tank 1 and the top of the buffer tank 2. The stirring unit 14 includes a stirring motor 1401 and an agitator 1402. The stirring motor 1401 is respectively installed on the top of the premixing tank 1 and the buffer tank 2. The agitator 1402 is installed on the driving shaft of the stirring motor 1401 and extends into the premixing tank 1 and the buffer tank 2. The stirring motor 1401 is electrically connected to the controller, and the controller controls the starting state of the stirring motor 1401.

[0024] The driving pump includes a premix liquid pump 3 and an inhibitor pump 4. The premix liquid pump 3 is connected to the outlet of the premix tank 1, and is connected to the premix tank 1 through the first premix branch pipe 101 to form a loop, and is connected to the inlet of the buffer tank 2 through the second premix branch pipe 102. One end of the inhibitor pump 4 is connected to the buffer tank 2, and the other end is connected to the solenoid valve group 13. The other end of the solenoid valve group 13 is connected to an external spraying device.

[0025] The spray device 9 includes a spray water inlet pipe 901, a buffer tank water inlet pipe 902, a water inlet main pipe 903, a regulating valve 1 904 and a regulating valve 2 905. One end of the spray water inlet pipe 901 is connected to the water inlet main pipe 903, and the other end extends into the premixing tank 1. One end of the buffer tank water inlet pipe 902 is connected to the water inlet main pipe 903, and the other end extends into the buffer tank 2. The regulating valve 1 904 and the regulating valve 2 905 are electrically connected to the controller. The regulating valve 1 904 is located on the spray water inlet pipe 901, and the regulating valve 2 905 is located on the buffer tank water inlet pipe 902. The controller is also used to control the operating status of the regulating valve 1 904 and the regulating valve 2 905.

[0026] The density detection unit includes a density meter 1 5 and a density meter 2 6. The density meter 1 5 is installed on the first premixing branch pipe 101, and the density meter 2 6 is installed on the top of the buffer tank 2. The controller controls the operating state of the regulating valve 1 904 according to the detection signal of the density meter 1 5. The controller is also used to control the operating state of the regulating valve 2 905 according to the detection signal of the density meter 2 6.

[0027] The liquid level detection unit includes a liquid level gauge 1 7 and a liquid level gauge 2 8. The liquid level gauge 1 7 is installed on the lower side of the premixing tank 1, and the liquid level gauge 2 8 is installed on the lower side of the buffer tank 2. The controller is used to control the opening and closing state of the regulating valve 1 904 according to the detection signal of the liquid level gauge 1 7. The controller is also used to control the operating state of the inhibitor pump according to the detection signal of the liquid level gauge 2 8.

[0028] In addition, the present application also includes a premix liquid pump pressure gauge 10, an inhibitor pump pressure gauge 11 and a flow meter 12. The premix liquid pump pressure gauge 10 is installed on the premix liquid pump 3, the inhibitor pump pressure gauge 11 is installed on the inhibitor pump 4, and the flow meter 12 is located between the inhibitor pump 4 and the solenoid valve group 13.

[0029] The specific implementation process is as follows:

[0030] Add a preset amount of inhibitor into the premixing tank 1, and the amount of inhibitor shall not exceed two-thirds of the volume of the premixing tank 1. When the liquid level displayed by the liquid level meter 7 is lower than the minimum liquid level, open the regulating valve 904 on the spray water inlet pipe 901 to add water into the premixing tank 1. When the liquid level is higher than the stirring liquid level, close the regulating valve 904 on the spray water inlet pipe 901, turn on the stirring motor 1401 on the top of the premixing tank 1, stir for 60 to 120 seconds, turn on the premix liquid pump 3, and circulate the inhibitor premix liquid into the premixing tank 1 through the first premix branch pipe 101. When the density value displayed by the densimeter 5 is higher than the set density, open the regulating valve 904 on the spray water inlet pipe 901, and close the regulating valve 904 on the spray water inlet pipe 901 until the density value displayed by the densimeter 5 is lower than the set density, or close the regulating valve 904 on the spray water inlet pipe 901 when the liquid level meter displays the liquid level higher than the maximum liquid level.

[0031] The premixed liquid pump 3 delivers the premixed liquid to the buffer tank 2 through the second premixed branch pipe 102. When the liquid level in the buffer tank 2 is higher than the minimum liquid level, the valve on the second premixed branch pipe 102 is closed, and the stirring motor 1401 on the buffer tank 2 is turned on. The density of the inhibitor solution in the buffer tank 2 is detected by the density meter 26. When the detected density is greater than the set density, the regulating valve 2 905 on the buffer tank water inlet pipe 902 is opened to feed water into the buffer tank 2. When the density value is lower than the set density, the regulating valve 2 905 on the buffer tank water inlet pipe 902 is closed, and the water feeding into the buffer tank 2 is stopped until the liquid level meter 28 reaches the maximum liquid level. The inhibitor pump is turned on to spray the inhibitor into the goaf.

[0032] The above are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. Intelligent spraying system of inhibitor in coal mine goaf, Features: It includes a premixing tank, a buffer tank, a driving pump, a density detection unit, a liquid level detection unit, a spray device, an electromagnetic valve group and a controller, wherein the driving pump, the density detection unit, the liquid level detection unit, the spray device and the electromagnetic valve group are all electrically connected to the controller; The premixing tank and the buffer tank are connected via a driving pump, the buffer tank and the electromagnetic valve group are connected via a driving pump, the density detection unit is respectively located between the premixing tank and the spraying device and between the buffer tank and the spraying device, the liquid level detection unit is respectively located on the premixing tank and the buffer tank, and the controller is used to control the operating states of the spraying device, the driving pump and the electromagnetic valve group according to the density detection signal of the density detection unit and the liquid level detection signal of the liquid level detection unit.

2. The intelligent spraying system for retardant in coal mine goaf according to claim 1, Features: The driving pump includes a premix liquid pump and an inhibitor pump. The premix liquid pump is connected to the outlet of the premix tank, and is connected to the premix tank through a first premix branch pipe to form a loop, and is connected to the inlet of the buffer tank through a second premix branch pipe. One end of the inhibitor pump is connected to the buffer tank, and the other end is connected to the solenoid valve group. The other end of the solenoid valve group is connected to an external spraying device.

3. The intelligent spraying system for retardant in coal mine goaf according to claim 2, Features: The spray device includes a spray water inlet pipe, a buffer tank water inlet pipe, a water inlet main pipe, a regulating valve 1 and a regulating valve 2. One end of the spray water inlet pipe is connected to the water inlet main pipe, and the other end extends into the premixing tank. One end of the buffer tank water inlet pipe is connected to the water inlet main pipe, and the other end extends into the buffer tank. The regulating valve 1 and the regulating valve 2 are electrically connected to a controller. The regulating valve 1 is located on the spray water inlet pipe, and the regulating valve 2 is located on the buffer tank water inlet pipe. The controller is also used to control the operating status of the regulating valve 1 and the regulating valve 2.

4. The intelligent spraying system for retardant in coal mine goaf according to claim 3, Features: The density detection unit includes a density meter 1 and a density meter 2, wherein the density meter 1 is installed on the first premixing branch pipe, and the density meter 2 is installed on the top of the buffer tank. The controller controls the operating state of the regulating valve 1 according to the detection signal of the density meter 1, and the controller is also used to control the operating state of the regulating valve 2 according to the detection signal of the density meter 2.

5. The intelligent spraying system for retardant in coal mine goaf according to claim 4, Features: The liquid level detection unit includes a liquid level gauge 1 and a liquid level gauge 2. The liquid level gauge 1 is installed on the lower side of the premixing tank, and the liquid level gauge 2 is installed on the lower side of the buffer tank. The controller is used to control the opening and closing state of the regulating valve 1 according to the detection signal of the liquid level gauge 1. The controller is also used to control the operating state of the catalytic pump according to the detection signal of the liquid level gauge 2.

6. The intelligent spraying system for retardant in coal mine goaf according to claim 5, Features: It also includes a premix liquid pump pressure gauge and an inhibitor pump pressure gauge. The premix liquid pump pressure gauge is installed on the premix liquid pump, and the inhibitor pump pressure gauge is installed on the inhibitor pump.

7. The intelligent spraying system for retardant in coal mine goaf according to claim 6, Features: It also includes a stirring unit, which includes a stirring motor and an agitator. The stirring motor is respectively installed on the top of the premixing tank and the buffer tank. The agitator is installed on the driving shaft of the stirring motor and extends into the premixing tank and the buffer tank. The stirring motor is electrically connected to the controller, and the controller is also used to control the starting state of the stirring motor.

8. The intelligent spraying system for retardant in coal mine goaf according to claim 7, Features: The invention also comprises a flow meter, wherein the flow meter is located between the retardant pump and the solenoid valve group.

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