Automatic mixing device for underground gas extraction drilling sealing material

Abstract

The utility model discloses an automatic mixing device for underground gas extraction drilling sealing materials, which comprises a carrier, an alarm and a control panel, a weighing component and a sealing material filling chamber are arranged on the carrier, a mixing chamber is arranged on the weighing component, a feed port is arranged at the top of the mixing chamber, and a sealing material filling chamber is arranged on the sealing material filling chamber. A discharging port of the sealing material filling chamber is arranged above a feeding port of the mixing chamber, a control baffle is arranged on the discharging port of the sealing material filling chamber, a water injection pipe and a water drainage pipe are arranged on the mixing chamber, a flow meter and a water injection pipe electromagnetic valve are arranged on the water injection pipe, and a water drainage pipe electromagnetic valve is arranged on the water drainage pipe. A motor, a stirring assembly and a liquid level sensor are arranged on the mixing chamber, and the motor is connected with the stirring assembly; a controller is arranged on the control panel and is in signal connection with the weighing assembly, the water injection pipe electromagnetic valve, the water drainage pipe electromagnetic valve, the motor, the liquid level sensor and the alarm. The device can realize the precise preparation of the sealing material and the automation of the mixing device.

Description

Technical Field

[0001] This utility model relates to the field of underground gas extraction technology in coal mines, specifically to an automatic mixing device for sealing materials in underground gas extraction boreholes. Background Technology

[0002] Coal seam gas extraction is an important method for eliminating coal seam gas hazards in coal mines. The sealing quality of the borehole is a key factor affecting the gas extraction effect.

[0003] With the continuous development of borehole sealing materials, the sealing materials used for grouting and sealing boreholes in underground coal mine gas drainage are gradually shifting from traditional cement-based materials to inorganic phase change gel materials. Different types of sealing materials have different material formulations, and the water-to-material ratios also vary. Currently, the preparation of underground sealing materials still relies on manual labor, with most workers using experience to mix the materials. This lack of precision results in the sealing materials not achieving optimal performance, failing to improve sealing quality, and causing waste of sealing materials.

[0004] Meanwhile, existing sealing material preparation devices lack human-machine interaction and have a low degree of automation. During grouting, the amount of water and sealing material depends on manual observation and replenishment, and functions such as autonomous monitoring of grout volume and water shortage alarms are not possible. After grouting, manual cleaning of the container is still required, as the container cannot be automatically cleaned, increasing the workload of workers and severely restricting work efficiency.

[0005] Therefore, there is a need to propose an automatic mixing device for sealing materials in underground gas extraction boreholes to solve the aforementioned technical problems in the existing technology. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic mixing device for sealing materials in underground gas extraction boreholes, so as to achieve precise control of the water-to-material ratio of the sealing material and automation of the sealing material mixing device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic mixing device for sealing materials in underground gas extraction boreholes includes a frame, a weighing assembly, a mixing chamber, an alarm, and a control panel.

[0009] A weighing component is provided on the rack, a mixing chamber is provided on the weighing component, and a feed inlet is provided on the top of the mixing chamber;

[0010] The carrier is provided with a sealing material filling chamber, the outlet of the sealing material filling chamber is located above the inlet of the mixing chamber, and a control baffle is provided on the outlet of the sealing material filling chamber.

[0011] The mixing chamber is equipped with a water injection pipe and a water drainage pipe. The water injection pipe is equipped with a flow meter and a water injection pipe solenoid valve, and the water drainage pipe is equipped with a water drainage pipe solenoid valve.

[0012] An electric motor is installed outside the mixing chamber, and a stirring assembly is installed inside the mixing chamber. The electric motor is connected to the stirring assembly.

[0013] A liquid level sensor is installed inside the mixing chamber;

[0014] The control panel is equipped with a controller, which is connected to the weighing assembly, the solenoid valve of the water injection pipe, the solenoid valve of the drain pipe, the motor, the liquid level sensor, and the alarm.

[0015] Preferably, the stirring assembly includes a connecting rod and stirring blades;

[0016] The upper vertical rod of the connecting rod is connected to the output shaft of the motor;

[0017] The vertical rod below the connecting rod is connected to the stirring fan blades.

[0018] Preferably, the control panel is equipped with a display screen and buttons.

[0019] The display screen and button signals are connected to the controller.

[0020] Preferably, the controller is a PLC controller.

[0021] Preferably, the flow meter is a mechanical flow meter.

[0022] Preferably, the top of the mixing chamber has an opening, and a mixing chamber cover is provided on the opening.

[0023] Preferably, the bottom plate of the mixing chamber is inclined, with the side of the bottom plate closest to the drain pipe being lower than the other side of the bottom plate.

[0024] Preferably, the shelf is provided with a sealed material storage chamber.

[0025] Preferably, the bottom of the shelf is equipped with casters.

[0026] Preferably, the motor is an intrinsically safe motor.

[0027] Compared with the prior art, this utility model has the following advantages:

[0028] As described above, the automatic mixing device for sealing materials in underground gas extraction boreholes disclosed in this utility model, through the coordinated operation of its various components, can accurately measure the weight of the sealing material entering the mixing chamber and the amount of water injected, achieving precise control of the water-to-material ratio. The controller controls the motor to drive the stirring assembly, enabling automatic stirring. By controlling the solenoid valves of the water injection pipe and the drainage pipe, automatic water injection and drainage functions are achieved. The combination of these two functions enables automatic cleaning, thus preventing residual slurry from adhering to containers or pipe interfaces due to prolonged lack of cleaning, affecting subsequent use and the equipment's lifespan. It also significantly improves the automation level of the mixing device. Furthermore, this utility model is equipped with a liquid level sensor and an alarm. When the slurry volume in the mixing chamber falls below a set value, the liquid level sensor transmits a signal to the controller, which then activates the alarm to sound, reminding the operator to prepare the slurry again, achieving real-time monitoring and alarm functions for the slurry volume. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0030] Figure 1 This is a schematic diagram of the structure of an automatic mixing device for sealing materials in underground gas extraction boreholes, as described in the embodiment.

[0031] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0032] In the diagram: 1-Control baffle; 2-Sealing material filling chamber; 3-Motor; 4-Mixing chamber cover; 5-Flow meter; 6-Water injection pipe; 7-Control panel; 8-Mixing chamber; 9-Drain pipe; 10-Loading rack; 11-Weighing assembly; 12-Wheel casters; 13-Sealing material storage chamber; 14-Agitator blades; 15-Connecting rod; 16-Level sensor; 17-Water injection pipe solenoid valve; 18-Drain pipe solenoid valve; 19-Base plate; 20-Inlet; 21-Support component. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] Example

[0040] like Figure 1 and Figure 2 As shown in the figure, this embodiment describes an automatic mixing device for sealing materials in underground gas extraction boreholes. The device includes a frame 10, a weighing assembly 11, a mixing chamber 8, an alarm, and a control panel 7.

[0041] A weighing assembly 11 is installed above the rack 10, and a mixing chamber 8 is installed above the weighing assembly 11. A feed inlet 20 is opened at the top of the mixing chamber 8. A control panel 7 is installed on the outer wall of the mixing chamber 8, and an alarm and a controller are installed inside the control panel 7. In this example, the controller is a PLC controller.

[0042] The weighing component 11 is used to weigh the sealing material in the mixing chamber 8, and the weighing component 11 is connected to the control system. In this embodiment, the weighing component 11 is an electronic scale.

[0043] A water injection pipe 6, which connects to the interior of the mixing chamber 8, is installed on the outer wall of the mixing chamber 8. A water injection pipe solenoid valve 17 and a flow meter 5, which is a mechanical flow meter, are installed on the water injection pipe 6. The control terminal of the water injection pipe solenoid valve 17 is connected to a controller.

[0044] A drain pipe 9 is provided at the bottom of the mixing chamber 8 to connect to the interior of the mixing chamber 8. A drain pipe solenoid valve 18 is provided on the drain pipe 9, and the control terminal signal of the drain pipe solenoid valve 18 is connected to the controller.

[0045] In this embodiment, a support member 21 is provided on the carrier 10, and a sealing material filling chamber 2 is provided on the support member 21. A control baffle 1 for limiting the flow of sealing material is provided at the bottom of the sealing material filling chamber 2. The control baffle 1 has a push-pull structure and can control the speed at which the sealing material is added to the mixing chamber 8. When the control baffle 1 is opened, the material begins to be added to the mixing chamber 8. The greater the degree to which the control baffle 1 is pulled outward, the larger the gap at the bottom outlet of the sealing material filling chamber 2, and the greater the filling speed of the sealing material. When it is pushed to completely block the entire outlet, the sealing material filling chamber 2 closes and the addition of material to the mixing chamber 8 stops.

[0046] The bottom outlet of the sealing material filling chamber 2 is located above the inlet 20 of the mixing chamber to ensure that the sealing material falls completely into the mixing chamber 8 during the filling process.

[0047] An electric motor 3 is installed above the mixing chamber 8, and the control terminal of the electric motor 3 is connected to a controller. A stirring assembly is installed inside the mixing chamber 8, and the output shaft of the electric motor 3 is connected to the stirring assembly, enabling the electric motor 3 to drive the stirring assembly to stir the sealing material.

[0048] In this embodiment, the stirring assembly consists of a connecting rod 15 and a stirring blade 14. The upper vertical rod of the connecting rod 15 is connected to the output shaft of the motor 3, and the lower vertical rod of the connecting rod 15 is connected to the stirring blade 14, which is a spiral stirring blade. The motor 3 can drive the spiral stirring blade 14 to stir the sealing material in the mixing chamber 8 through the connecting rod 15.

[0049] The control panel 7 also features a display screen and buttons, and an alarm is internally mounted on it. The display screen, buttons, and alarm signals are connected to the controller.

[0050] A liquid level sensor 16 is installed on the inner wall of the mixing chamber 8, and the liquid level sensor 16 is connected to the controller. When the amount of slurry in the mixing chamber 8 is lower than the set value, the liquid level sensor 16 transmits a signal to the controller, and the controller controls the alarm to sound to remind the staff to mix slurry again, thus realizing the real-time monitoring and alarm function of slurry volume.

[0051] Control panel 7 is the human-machine interface. Workers can select the equipment operation mode as needed. The operation modes include material weighing, slurry monitoring, water injection control, slurry stirring, tank cleaning, etc.

[0052] This embodiment also includes a sealing material storage chamber 13 on the carrier 10 for storing spare sealing materials. The sealing material storage chamber 13 is located near the sealing material filling chamber 2 to facilitate the storage, transportation and replenishment of sealing materials during the downhole sealing process.

[0053] An opening is provided at the top of the mixing chamber 8, and a mixing chamber cover 4 is provided on the opening. The mixing chamber cover 4 is provided with a handle, which facilitates opening and closing the mixing chamber cover 4. The opening is used for inspection or subsequent maintenance of the interior of the mixing chamber 8.

[0054] The bottom plate 19 of the mixing chamber is inclined, with the side of the bottom plate 19 closest to the drain pipe 9 being lower than the other side of the bottom plate 19, and the position where the drain pipe 9 is connected is the lowest point of the bottom plate 19. The inclined bottom plate 19 facilitates the outflow of slurry in the mixing chamber 8, reduces residue, and avoids waste of sealing material.

[0055] The bottom of the shelf 10 is equipped with four casters 12, which can move the entire device.

[0056] In this embodiment, the motor 3 is an intrinsically safe motor. The motor 3 is connected to two spiral stirring blades 14 through the connecting rod 15. The shape and number of stirring blades 14 can be reasonably changed according to the actual situation.

[0057] The working process of an automatic mixing device for sealing materials in downhole gas extraction boreholes in this embodiment is briefly described as follows:

[0058] (1) Before the grouting process begins, move the device to a suitable position, pour the sealing material into the sealing material filling chamber 2, open the control panel 7, and select the material weighing function. Open the filling chamber control baffle 1, and the sealing material falls into the mixing chamber 8. At the same time, observe the filling weight on the display screen of the control panel 7. When it approaches the target ratio, push the control baffle 1 to reduce the gap at the bottom outlet of the sealing material filling chamber 2, so as to reduce the filling speed of the sealing material. When the filling amount of sealing material reaches the target amount, push the control baffle 1 until the outlet of the sealing material filling chamber 2 is completely closed, and stop the filling.

[0059] (2) After the material is added, connect the water injection pipe 6 to the downhole water pipe, select the water injection function on the control panel 7, and the controller controls the solenoid valve 17 of the water injection pipe to open and inject water into the mixing chamber 8. At the same time, observe the flow meter 5. When the water inflow reaches the target value of the water-material ratio, close the solenoid valve 17 of the water injection pipe and stop the water injection.

[0060] (3) After water injection is completed, select the stirring function on the control panel 7. The intrinsically safe motor 3 will start and run at low speed for ten minutes to achieve water mixing and stirring.

[0061] (4) After mixing, connect the grouting pump to the drain pipe 9, and use the control panel 7 to open the drain pipe solenoid valve 18 to perform grouting.

[0062] (5) During the grouting process, the liquid level sensor 16 will sense the liquid level of the grout in the mixing chamber 8 in real time. If the grout volume is lower than the set value, the alarm in the control panel 7 will sound a buzzer to remind you to mix the grout again.

[0063] (6) After grouting is completed, first use the control panel 7 to close the drain pipe solenoid valve 18 and ensure that the water injection pipe 6 is connected to the well water pipe. Select the water injection function on the control panel 7. The controller controls the water injection pipe solenoid valve 17 to open and inject water. At the same time, observe the flow meter 5. When the required amount of water for cleaning is reached, close the water injection pipe solenoid valve 17 to stop water injection. Then select the cleaning function on the control panel 7. At this time, the intrinsically safe motor 3 rotates at high speed, driving the spiral stirring fan blade 14 to rotate at high speed to clean the inner wall of the mixing chamber 8 and the surface of the stirring fan blade 14. The stirring process is repeated 3 times, each time for five minutes.

[0064] (7) After cleaning, use the control panel 7 to open the drain pipe solenoid valve 18 to drain the sewage.

[0065] The embodiments of this utility model are only used to illustrate the technical solutions of this utility model and are not intended to limit it. For those skilled in the art, it will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic mixing device for sealing materials in underground gas drainage boreholes, characterized in that: Includes racks, weighing components, mixing chambers, alarms, and control panels; A weighing component is provided on the rack, a mixing chamber is provided on the weighing component, and a feed inlet is provided on the top of the mixing chamber; The carrier is provided with a sealing material filling chamber, the outlet of the sealing material filling chamber is located above the inlet of the mixing chamber, and a control baffle is provided on the outlet of the sealing material filling chamber. The mixing chamber is equipped with a water injection pipe and a water drainage pipe. The water injection pipe is equipped with a flow meter and a water injection pipe solenoid valve, and the water drainage pipe is equipped with a water drainage pipe solenoid valve. An electric motor is installed outside the mixing chamber, and a stirring assembly is installed inside the mixing chamber. The electric motor is connected to the stirring assembly. A liquid level sensor is installed inside the mixing chamber; The control panel is equipped with a controller, which is connected to the weighing assembly, the solenoid valve of the water injection pipe, the solenoid valve of the drain pipe, the motor, the liquid level sensor, and the alarm.

2. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The stirring assembly includes a connecting rod and stirring blades; The upper vertical rod of the connecting rod is connected to the output shaft of the motor; The vertical rod below the connecting rod is connected to the stirring fan blades.

3. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The control panel is equipped with a display screen and buttons. The display screen and button signals are connected to the controller.

4. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The controller is a PLC controller.

5. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The flow meter is a mechanical flow meter.

6. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: An opening is provided at the top of the mixing chamber, and a mixing chamber cover is provided on the opening.

7. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The bottom plate of the mixing chamber is inclined, with the side of the bottom plate closest to the drain pipe being lower than the other side of the bottom plate.

8. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The shelf is equipped with a sealed material storage chamber.

9. The automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The bottom of the rack is equipped with casters.

10. An automatic mixing device for sealing materials in underground gas extraction boreholes according to claim 1, characterized in that: The electric motor is an intrinsically safe electric motor.

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