Mine intrinsic safety type gas drainage pipeline automatic water drainer

Abstract

The utility model provides a kind of mine intrinsic safety type gas extraction pipeline automatic water drainer, including cylinder, negative pressure reversing valve group is arranged in cylinder, negative pressure reversing valve group includes valve body and suspension assembly, negative pressure cavity and positive pressure cavity are arranged in valve body, the top of negative pressure cavity is screwed with negative pressure interface, upper magnet is arranged in positive pressure cavity, air inlet is arranged on cylinder, oilless filter element is arranged at air inlet, air inlet is connected with positive pressure cavity by gas tube, the bottom of positive pressure cavity is equipped with communicating port, positive pressure cavity is communicated with cylinder by communicating port, the upper end of upper magnet is provided with plugging block, lower end extends communicating port, the upper end of suspension assembly is provided with plugging rod, the top of plugging rod is placed in negative pressure cavity, lower magnet disc that cooperates with upper magnet is arranged on plugging rod.The utility model reduces the impurity attached on upper and lower magnet by the cooperation of oilless filter element, positive pressure cavity, upper magnet and lower magnet disc, ensures its magnetic attraction stability, to ensure that water drainer works stably and reliably.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to an intrinsically safe automatic water drainer for mining gas extraction pipelines. Background Technology

[0002] Coal mine gas drainage systems often accumulate large amounts of water and sediment, frequently causing pipe blockages and poor drainage. This leads to increased negative pressure in the system, increased torque of the drainage motor, and a significant reduction in drainage efficiency, seriously threatening safe production.

[0003] The gas drainage pipeline drain valve mainly adjusts the positive and negative pressure inside the cylinder through a negative pressure reversing valve assembly, thereby opening and closing the inlet and outlet check valves. However, existing negative pressure reversing valve assemblies are prone to the following problems: 1. The negative pressure reversing valve assembly uses magnetic attraction to hold the float, but the magnet surface easily attracts impurities, affecting the magnetic force and reducing reliability; 2. When the float rises with the incoming water, the rising rate is relatively fast, making it susceptible to interference and affecting the stability of the negative pressure reversing valve assembly; 3. If the float's guide rod and sealing rod are an integrated structure, installation is inconvenient; if they are screwed together, the screw connection is prone to loosening, affecting the normal operation of the negative pressure reversing valve assembly. Furthermore, existing drain valves do not facilitate real-time monitoring of the drain valve's operating status, hindering timely detection and handling of drain valve malfunctions. Utility Model Content

[0004] This utility model proposes an intrinsically safe automatic water drainer for mining gas extraction pipelines. Through the cooperation of an oil-free filter element, a positive pressure chamber, an upper magnet, and a lower magnet disc, impurities adhering to the upper and lower magnets are reduced, ensuring the stability of their magnetic attraction and thus ensuring the stable and reliable operation of the water drainer.

[0005] The technical solution of this utility model is implemented as follows: An intrinsically safe automatic water drainer for mining gas extraction pipelines includes a cylinder. A negative pressure reversing valve assembly is installed inside the cylinder. The negative pressure reversing valve assembly includes a valve body and a suspension component. A negative pressure chamber and a positive pressure chamber are installed inside the valve body. A negative pressure interface is screwed to the top of the negative pressure chamber. An upper magnet is installed inside the positive pressure chamber. An air inlet is installed on the cylinder, and an oil-free filter element is installed at the air inlet. The air inlet is connected to the positive pressure chamber via an air pipe. A connecting port is provided at the bottom of the positive pressure chamber, allowing the positive pressure chamber to communicate with the cylinder through the connecting port. A blocking block is installed at the upper end of the upper magnet, and its lower end extends out of the connecting port. A blocking rod is installed at the upper end of the suspension component, with the top of the blocking rod placed inside the negative pressure chamber. A lower magnet disc that cooperates with the upper magnet is installed on the blocking rod.

[0006] Furthermore, the suspension assembly includes a support frame connected to the valve body, a vertically sliding guide rod is provided inside the support frame, the lower end of the guide rod slides through the bottom of the support frame, the upper end of the guide rod is screwed to a sealing rod, a transverse cotter pin is inserted at the screw connection, the top of the sealing rod is placed in the negative pressure chamber, a float is slidably fitted in the middle of the guide rod, a lower positioning plate is fixed on the guide rod below the float, and a dome disc is slidably fitted on the guide rod above the float.

[0007] Furthermore, an intrinsically safe cavity is provided on the cylinder body, and an intrinsically safe power supply, an LCD screen and a controller are provided inside the intrinsically safe cavity. A miniature pressure probe is provided on the cylinder body to detect changes in pressure inside the cylinder. The miniature pressure probe, LCD screen and controller are all electrically connected to the intrinsically safe power supply. The miniature pressure probe and LCD screen are both electrically connected to the controller. The controller is also equipped with an infrared remote control receiver module and an RS485 communication interface.

[0008] Furthermore, the positive pressure chamber includes two chambers, symmetrically arranged on both sides of the negative pressure chamber, and both upper magnets are magnetically attracted to the same lower magnet disk.

[0009] Furthermore, the cylinder is equipped with a pneumatic quick connector, and the negative pressure interface is connected to the pneumatic quick connector through a negative pressure pipe. A side through hole is provided on the side wall of the negative pressure chamber, and the negative pressure chamber communicates with the cylinder through the side through hole.

[0010] Furthermore, a detachable transparent side cover is fixed to the end of the intrinsically safe cavity away from the cylinder, and a first O-ring is provided between the transparent side cover and the intrinsically safe cavity.

[0011] Furthermore, support plates are symmetrically fixed on both sides of the cylinder, and cross braces are fixed between the support plates by bolts. The upper end of the valve body is fixedly connected to the cross braces by bolts.

[0012] Furthermore, a sloping bottom is fixed at the bottom of the cylinder, a drain pipe is installed on the lowest side of the sloping bottom, and a one-way valve is installed at the drain pipe. A water inlet pipe is installed at the top of the cylinder, and a one-way valve is installed at the water inlet pipe.

[0013] Furthermore, a removable transparent top cover is provided at the top of the cylinder, and a second O-ring is provided between the transparent top cover and the cylinder.

[0014] Furthermore, a protective frame is fixed to the lower side of the drain pipe, and symmetrical handles are fixed to the outer side of the cylinder.

[0015] The beneficial effects of this utility model are:

[0016] This invention places the upper magnet inside the positive pressure chamber. After being filtered by the oil-free filter element, the outside gas enters the positive pressure chamber and then enters the cylinder through the connecting port. During the process of entering the cylinder, the upper magnet and the lower magnet disc are simultaneously purged to reduce the adhering impurities and ensure the stability of its magnetic attraction.

[0017] This invention utilizes a dome-shaped disc and a float to form a counterweight float, controlling the rate at which the float rises with the incoming water. A horizontal cotter pin is inserted at the screw connection between the guide rod and the sealing rod. This cotter pin prevents loosening at the screw connection and also acts as an upper positioning rod. When the dome-shaped disc and the float rise to the cotter pin, the cotter pin pushes the sealing rod and guide rod upwards synchronously, eliminating the need for an upper positioning plate. Furthermore, the entire structure is easy to install and disassemble. Additionally, the top of the sealing rod is placed within the negative pressure chamber, and the lower end of the guide rod slides vertically along the bottom of the support frame, ensuring that the guide rod remains vertical and preventing swaying due to the bottom being suspended.

[0018] This invention has two positive pressure cavities, and both upper magnets are magnetically attracted to the same lower magnet disk, ensuring the strength and stability of the adsorption.

[0019] This invention adds the functions of displaying the working status of the water dispenser and uploading data by setting up an intrinsically safe power supply, an LCD screen, a controller and a miniature pressure probe. This allows for real-time monitoring of the equipment's working status and the water storage status in the gas pipeline, thereby ensuring that the pipeline remains unobstructed and guaranteeing safe production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 for Figure 1 The right view;

[0023] Figure 3 for Figure 1 Rear view;

[0024] Figure 4 for Figure 1 Sectional view of AA;

[0025] Figure 5 This is a schematic diagram of the negative pressure reversing valve assembly.

[0026] Figure 6 for Figure 5 Top view;

[0027] Figure 7 for Figure 6 A cross-sectional view of BB.

[0028] 1. Cylinder body; 2. Handle; 3. Transparent top cover; 4. Second O-ring seal; 5. Drain pipe; 6. Protective frame; 7. Drain check valve; 8. Inlet pipe; 9. Inlet check valve; 10. Horizontal brace; 11. Valve body; 12. Negative pressure chamber; 13. Positive pressure chamber; 14. Negative pressure interface; 15. Pneumatic quick connector; 16. Side through hole; 17. Upper magnet; 18. Sealing block; 19. Connecting port; 20. Oil-free filter element; 21. Air pipe; 22. Support frame; 23. Guide rod; 24. Sealing rod; 25. Cotter pin; 26. Lower magnet plate; 27. Float; 28. Lower positioning plate; 29. ​​Dome disc; 30. Intrinsically safe cavity; 31. Miniature pressure probe; 32. Transparent side cover; 33. First O-ring seal. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] like Figure 1-4 As shown, the intrinsically safe automatic water drainer for mine gas drainage pipelines includes a cylinder 1. Symmetrical handles 2 are fixed to the outside of the cylinder 1 for easy transport. A transparent cover 3 is bolted to the top of the cylinder 1, allowing for easy opening of the cover as needed. A second O-ring 4 is installed between the transparent cover 3 and the cylinder 1, allowing for easy observation of the interior of the cylinder 1. A sloping bottom is fixed to the bottom of the cylinder 1, with a drain pipe 5 located on the lowest side. A protective frame 6 is fixed to the lower side of the drain pipe 5, and a one-way valve 7 is installed at the drain pipe 5. An inlet pipe 8 is fixed to the upper part of the cylinder 1, with an inlet one-way valve 9 installed at the inlet pipe 8. Both the inlet one-way valve 9 and the drain one-way valve 7 are existing structures.

[0032] like Figure 2 and 4 As shown in Figure 7, support plates are symmetrically fixed on both sides inside the cylinder 1. A cross brace 10 is fixed between the support plates by bolts. A negative pressure reversing valve assembly is installed inside the cylinder 1. The negative pressure reversing valve assembly includes a valve body 11 and a suspension component. The upper end of the valve body 11 is fixedly connected to the cross brace 10 by bolts. A negative pressure chamber 12 and a positive pressure chamber 13 are provided inside the valve body 11. A negative pressure interface 14 is screwed to the top of the negative pressure chamber 12. A pneumatic quick connector 15 is fixed on the cylinder 1. The negative pressure interface 14 and the pneumatic quick connector 15 are connected through a negative pressure pipe. A side through hole 16 is provided on the side wall of the negative pressure chamber 12. The negative pressure chamber 12 communicates with the cylinder 1 through the side through hole 16.

[0033] Two positive pressure chambers 13 are symmetrically arranged on both sides of the negative pressure chamber 12. A connecting port 19 is provided at the bottom of each positive pressure chamber 13, through which the positive pressure chamber 13 communicates with the cylinder 1. An upper magnet 17 is installed inside the positive pressure chamber 13, with a sealing block 18 fixed to its upper end and its lower end extending out of the connecting port 19. An air inlet is provided on the cylinder 1, with an oil-free filter element 20 fixed at the inlet. The air inlet is connected to the positive pressure chamber 13 via an air pipe 21. The air pipe 21 is a Y-shaped pipe, with one end connected to the air inlet and the other two ends connected to the two positive pressure chambers 13 respectively.

[0034] The suspension assembly includes a support frame 22 bolted to the valve body 11. A vertically sliding guide rod 23 is disposed within the support frame 22. The bottom of the guide rod 23 slides through the bottom of the support frame 22, and a sealing rod 24 is screwed to the upper end of the guide rod 23. A transverse cotter pin 25 is inserted at the screw joint between the guide rod 23 and the sealing rod 24 to prevent loosening. The top of the sealing rod 24 slides through the bottom of the negative pressure chamber 12 and is positioned within the negative pressure chamber 12. The sealing rod 24 is vertically aligned with the negative pressure interface 14. A lower magnet plate 26, which cooperates with the upper magnet 17, is fixed to the sealing rod 24. Both upper magnets 17 are magnetically attracted to the same lower magnet plate 26.

[0035] A float 27 is slidably mounted on the middle of the guide rod 23. A lower positioning plate 28 is fixed on the guide rod 23 below the float 27. A dome disc 29 is slidably mounted on the guide rod 23 above the float 27. The dome disc 29 serves as a counterweight.

[0036] The automatic water drainer is used as follows: Connect the pneumatic quick connector 15 and the inlet pipe 8 to the gas pipeline. Open the negative pressure pipe and the inlet check valve 9. Under the negative pressure of the gas pipeline, the drain check valve 7 is closed. Water in the gas pipeline can flow into the drainer through the inlet pipe 8. The float 27 drives the dome disc 29 to rise with the water level. As the float 27 rises, when the dome disc 29 reaches the position of the cotter pin 25, it pushes the sealing rod 24 and the lower magnetic disc 26 to rise synchronously through the cotter pin 25. The top of the sealing rod 24 abuts against the negative pressure interface 14, closing the negative pressure interface 14. The lower magnetic disc 26 and the upper magnet 17 are magnetically connected, pushing the upper magnet 17 upward. The sealing block 18 moves away from the connecting port 19, opening the connecting port 19. At this time, the cylinder 1 is connected to the atmosphere through the positive pressure chamber 13, the air pipe 21, and the oil-free filter element 20, and the inlet check valve 9 is closed. Under the static pressure of the accumulated water, the drain check valve 7 is opened, and water begins to drain.

[0037] As water continues to flow out of the cylinder 1, the float 27 and the dome disc 29 descend, and through the lower positioning plate 28, the guide rod 23 and the sealing rod 24 move down to reset. The negative pressure port 14 opens, the upper magnet 17 moves down to reset, and the sealing block 18 closes the positive pressure chamber 13. At this time, the negative pressure pipe opens, the water drainer reconnects to the gas pipeline, and the float position is back to the initial state.

[0038] Example 2

[0039] This embodiment is basically the same as Embodiment 1, except that: Figure 2-4 As shown, an intrinsically safe cavity 30 is fixed on the cylinder 1. An intrinsically safe power supply, an LCD screen, and a controller are installed inside the intrinsically safe cavity 30. The controller uses a microcontroller, model AT32F403ACGT7. A miniature pressure probe 31 is fixed on the cylinder 1 to detect pressure changes inside the cylinder 1. The miniature pressure probe 31, the LCD screen, and the controller are all electrically connected to the intrinsically safe power supply, and the miniature pressure probe 31 and the LCD screen are both electrically connected to the controller. The controller also has an infrared remote control receiver module and an RS485 communication interface, which is connected to an RS485 communication cable.

[0040] When the water dispenser automatically fills and drains water, the pressure in the cylinder 1 will change significantly. The pressure inside the cylinder 1 is detected by the miniature pressure probe 31 and transmitted to the controller. The controller controls the LCD screen to display the water dispenser's working status information in real time, such as the water inlet status, water outlet status, pipeline pressure, working time, and fault status. Specifically:

[0041] When the pipeline pressure is greater than -5 kPa, it is in "water discharge mode" and the timer is reset to zero and restarted; when the pipeline pressure is less than -5 kPa, it is in "water inlet mode" and the timer is reset to zero and restarted again.

[0042] The pipeline pressure is the real-time pressure detected by the miniature pressure probe 31;

[0043] The working time is timed from the moment the power is turned on;

[0044] Fault status: When the water inlet time exceeds the set time, it is determined that the water inlet of the drainer is faulty or the gas pipeline is dry; when the water outlet time exceeds the set time, it is determined that the water outlet of the drainer is faulty.

[0045] The above-mentioned working status information can be uploaded to the background management system via RS485 communication cable, which facilitates real-time monitoring of the working status of the water dispenser and determines whether there is water in the gas extraction pipeline; the RS485 address of the water dispenser can be set via an infrared remote control transmitter.

[0046] The end of the intrinsically safe cavity 30 away from the cylinder 1 is fixed with a detachable transparent side cover 32 by bolts. A first O-ring 33 is installed between the transparent side cover 32 and the intrinsically safe cavity 30. When it is necessary to view the display information of the LCD screen, it can be viewed directly through the transparent side cover 32.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intrinsically safe automatic water drainer for mine gas drainage pipelines, comprising a cylinder, wherein a negative pressure reversing valve assembly is installed inside the cylinder, the negative pressure reversing valve assembly comprising a valve body and a suspension component, characterized in that: The valve body is equipped with a negative pressure chamber and a positive pressure chamber. The top of the negative pressure chamber is screwed with a negative pressure interface. The positive pressure chamber is equipped with an upper magnet. The cylinder is equipped with an air inlet, and an oil-free filter element is installed at the air inlet. The air inlet is connected to the positive pressure chamber through an air pipe. The bottom of the positive pressure chamber is equipped with a connecting port, and the positive pressure chamber is connected to the cylinder through the connecting port. The upper end of the upper magnet is equipped with a blocking block, and the lower end extends out of the connecting port. The upper end of the suspension component is equipped with a blocking rod, the top of which is placed in the negative pressure chamber. The blocking rod is equipped with a lower magnet disc that cooperates with the upper magnet.

2. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: The suspension assembly includes a support frame connected to the valve body. A vertically sliding guide rod is provided inside the support frame. The lower end of the guide rod slides through the bottom of the support frame, and the upper end of the guide rod is screwed to a plugging rod. A horizontal cotter pin is inserted at the screw connection. The top of the plugging rod is placed in the negative pressure chamber. A float is slidably fitted in the middle of the guide rod. A lower positioning plate is fixed on the guide rod below the float, and a dome disc is slidably fitted on the guide rod above the float.

3. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: An intrinsically safe cavity is provided on the cylinder body, and an intrinsically safe power supply, an LCD screen and a controller are provided inside the intrinsically safe cavity. A miniature pressure probe is provided on the cylinder body to detect changes in pressure inside the cylinder. The miniature pressure probe, LCD screen and controller are all electrically connected to the intrinsically safe power supply. The miniature pressure probe and LCD screen are both electrically connected to the controller. The controller is also equipped with an infrared remote control receiver module and an RS485 communication interface.

4. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to any one of claims 1-3, characterized in that: The positive pressure chamber includes two chambers, which are symmetrically arranged on both sides of the negative pressure chamber. Both upper magnets are magnetically attracted to the same lower magnet disk.

5. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: The cylinder is equipped with a pneumatic quick connector, and the negative pressure interface is connected to the pneumatic quick connector through a negative pressure pipe. The side wall of the negative pressure chamber is provided with a side through hole, and the negative pressure chamber communicates with the cylinder through the side through hole.

6. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 3, characterized in that: A detachable transparent side cover is fixed to the end of the intrinsically safe cavity away from the cylinder, and a first O-ring is provided between the transparent side cover and the intrinsically safe cavity.

7. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: Support plates are symmetrically fixed on both sides of the cylinder, and cross braces are fixed between the support plates by bolts. The upper end of the valve body is fixedly connected to the cross braces by bolts.

8. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: The bottom of the cylinder is fixed with a sloping bottom, and a drain pipe is installed on the lowest side of the sloping bottom. A one-way valve is installed at the drain pipe. A water inlet pipe is installed at the top of the cylinder, and a one-way valve is installed at the water inlet pipe.

9. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: The top of the cylinder is equipped with a removable transparent cover, and a second O-ring is installed between the transparent cover and the cylinder.

10. The intrinsically safe automatic water drainer for mining gas drainage pipelines according to claim 1, characterized in that: A protective frame is fixed to the lower side of the drain pipe, and symmetrical handles are fixed to the outer side of the cylinder.

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