Automatic dewatering device for gas extraction pipeline

Abstract

The application discloses a kind of automatic dewatering devices for gas extraction pipeline, including dehydrator, upper is cyclone, lower is water storage cavity, cyclone side wall is equipped with tangential downward inclined extraction pipe, top is equipped with gas discharge pipe;Water storage cavity is equipped with driving magnetic ring, driving magnetic ring center is equipped with float ball, float ball top is equipped with plugging head;Water storage cavity is equipped with driven magnetic ring, and is magnetically coupled with driving magnetic ring;Negative pressure balance valve is arranged between water storage cavity and cyclone, and air passage valve is arranged on water storage cavity;First valve control mechanism and driven magnetic ring linkage control negative pressure balance valve opening and closing, second valve control mechanism and driven magnetic ring linkage time-delay control air passage valve opening and closing.The application uses magnetic non-contact transmission to replace traditional mechanical connecting rod, completely eliminates coal powder jam;Through the interlocking timing of first closing negative pressure balance valve and then time-delay opening air passage valve, prevent air from being sucked into extraction pipeline, and be applicable to coal mine underground high negative pressure, coal powder containing extraction working condition.

Description

Technical Field

[0001] This invention relates to the field of gas extraction technology, and more specifically, to an automatic dehydration device for gas extraction pipelines. Background Technology

[0002] During coal mine gas drainage, a large amount of water accumulates in the gas pipelines. This water originates from the formation water within the coal seam itself and from condensate released under the negative pressure of drainage. This water accumulation reduces the effective flow cross-section of the pipeline, increases drainage resistance, and severely impacts gas drainage efficiency and concentration.

[0003] Currently, underground gas drainage pipelines in coal mines mainly use negative pressure automatic water drainers for drainage. Existing negative pressure automatic water drainers mostly employ a float-link mechanical structure, relying on the float to directly drive the valve opening and closing via a mechanical link. Because impurities such as coal dust and slag in the pumped water easily adhere to the link mechanism, mechanical jamming occurs, causing frequent failures of the automatic water drainer and preventing continuous and reliable automatic water drainage.

[0004] Therefore, there is an urgent need for an automatic dehydration device that can avoid mechanical linkage jamming and operate reliably under negative pressure. Summary of the Invention

[0005] To address the above deficiencies, this invention provides an automatic dewatering device for gas extraction pipelines, which solves the technical problem that the linkage mechanism is easily blocked by coal dust and slag, making it impossible to continuously and reliably release water automatically under negative pressure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An automatic dewatering device for a gas extraction pipeline includes: The dewatering device has a cyclone chamber at the top and a water storage chamber at the bottom. The cyclone chamber has multiple tangentially downward inclined extraction pipes on its side wall, a gas discharge pipe at the top center, and a drain pipe at the bottom of the water storage chamber with a one-way valve installed on it. An active magnetic ring is installed in the water storage chamber in a height-adjustable manner. A float is installed at the center of the ring, and a sealing head for sealing the connection between the cyclone chamber and the water storage chamber is installed on the top of the float in a sliding and height-adjustable manner. The driven magnetic ring is vertically mounted outside the water storage chamber and magnetically coupled to the active magnetic ring, moving up and down synchronously with it. A negative pressure balancing pipe is installed between the water storage chamber and the cyclone chamber, and a negative pressure balancing valve is installed on it. A vent pipe is installed on the water storage chamber, and a vent valve is installed on it. The first valve control mechanism, which moves up and down synchronously with the driven magnetic ring, is used to control the opening and closing of the negative pressure balance valve. The second valve control mechanism rises and falls synchronously with the driven magnetic ring, and is used to control the opening and closing of the atmospheric valve after the driven magnetic ring rises to the highest position.

[0007] The active magnetic ring and the driven magnetic ring are driven by magnetic non-contact penetration through the cylinder wall. The first valve control mechanism and the second valve control mechanism are all located outside the water storage chamber, which completely isolates them from the pumped water containing coal powder and coal slag in the water storage chamber. This fundamentally eliminates the root cause of the failure caused by coal powder adhering to the connecting rod mechanism in traditional devices, and enables the device to operate continuously and reliably in pumped water containing coal powder for a long time. By coordinating the timing of the first and second valve control mechanisms, an interlocking control logic of "closing the negative pressure balance valve first and then opening the atmospheric vent valve after a delay" is achieved, preventing outside air from being sucked into the extraction pipeline during the drainage process and ensuring that the gas extraction concentration and extraction efficiency are not affected.

[0008] As a further technical solution, the permanent magnets of both the active magnetic ring and the driven magnetic ring are covered with a non-magnetic insulating sleeve, which is a ceramic layer or an oil-resistant rubber layer.

[0009] By completely physically isolating the magnet from the extraction medium, the magnetic particles in the coal powder are prevented from adsorbing onto the magnet surface and forming "magnetic mud," which would lead to a decrease in magnetic force and transmission failure. This ensures the stable transmission capability of the magnetic coupling mechanism under long-term coal powder conditions and extends the effective service life of the device.

[0010] As a further technical solution, the first valve control mechanism includes: The first lifting rod is installed on one side outside the water storage chamber. A magnetic baffle is installed at its upper end and a first driven magnetic block is installed at its lower end. The first driven magnetic block is magnetically coupled to the driven magnetic ring. The first transmission gear is installed on the drive end of the negative pressure balance valve; The first transmission rack is fixed on the first lifting rod and meshes with the first transmission gear; A fixed magnet is mounted on the cylinder of the water storage chamber via a bracket to attract the magnetic baffle and limit the lifting height of the first lifting rod.

[0011] The driven magnetic ring drives the first driven magnetic block and the first lifting rod through non-contact magnetic coupling, and then drives the negative pressure balance valve through gear and rack transmission. There are no hinge points or sliding linkages in the entire transmission chain, which completely avoids the risk of coal powder jamming. Furthermore, the fixed magnet has both adsorption and limiting functions. When the first lifting rod rises to the highest position, the magnetic baffle is adsorbed onto the fixed magnet, keeping the negative pressure balance valve closed without continuous driving force, thus preventing the valve from being accidentally opened due to vibration or gravity.

[0012] As a further technical solution, the magnetic force between the first driven magnetic block and the driven magnetic ring is less than the magnetic force between the active magnetic ring and the driven magnetic ring, and the magnetic force of the fixed magnet is less than the magnetic force between the first driven magnetic block and the driven magnetic ring.

[0013] By precisely setting the magnetic force progression relationship, automatic timing separation without external control signals is achieved: after the driven magnetic ring rises to its highest position, the first lifting rod and the first driven magnetic block stop rising due to the limiting position of the fixed magnet. The driven magnetic ring automatically separates from the first driven magnetic block using the smaller magnetic force between it and the first driven magnetic block and continues to rise, achieving a seamless connection between the two stages of "closing the negative pressure balance valve" and "the driven magnetic ring continuing to rise and triggering subsequent actions." During descent, the driven magnetic ring recouples with the first driven magnetic block, causing the negative pressure balance valve to open automatically. The entire magnetic force grading design requires no electronic or pneumatic control components, relying entirely on the relationship between the magnitudes of the magnetic forces to achieve timing control, which meets the explosion-proof requirements of underground coal mines.

[0014] As a further technical solution, the second valve control mechanism includes: The second lifting rod is mounted on the other side of the outside of the water storage chamber and can be lifted and lowered. A second driven magnetic block is slidably fitted on its lower end. The second driven magnetic block is magnetically coupled to the driven magnetic ring. The second transmission gear is installed on the drive end of the vent valve; The second transmission rack is fixed on the second lifting rod and meshes with the second transmission gear; A positioning block is fixed to the lower side of the second lifting rod; A compression spring is fitted onto the second lifting rod and positioned between the positioning block and the second driven magnet. The push-type locking pin assembly is located outside the water storage chamber and is inserted into the positioning block to lock or release the second lifting rod.

[0015] By sliding the second driven magnetic block onto the lower end of the second lifting rod, the upward motion of the driven magnetic ring is converted into the elastic potential energy of the compressed spring for storage, while the second lifting rod itself is locked in place by the locking pin assembly, thus achieving the separation of "energy storage" and "action" in time. The push-type locking pin assembly and the positioning block are engaged to reliably lock the second lifting rod during the compression spring energy storage process, preventing the spring from releasing prematurely and causing the atmospheric valve to open too early. This ensures that the timing logic of "closing the negative pressure balance valve first and then opening the atmospheric valve" can be executed accurately.

[0016] As a further technical solution, the push-button locking pin assembly includes: Locking pin box, installed on the upper side of the other side of the water storage cavity; The locking pin is telescopically located at the center of the side surface of the locking pin box, and its inner end is fitted with a locking spring to drive the locking pin to pop out automatically. The locking pin hole is formed on the side surface of the positioning block and corresponds to the position of the locking pin; The unlocking lever is telescopically located at the center of the lower surface of the lock pin box. It is engaged with the lock pin by a bevel and is used to drive the lock pin to retract and unlock. When the unlocking rod is squeezed and retracted, its inclined surface pushes the locking pin to overcome the elastic force of the locking spring and retract into the locking pin box, causing the locking pin to disengage from the locking pin hole of the positioning block and releasing the second lifting rod; After the pressure on the unlocking rod is released, the locking pin automatically pops out under the action of the locking spring, and pushes the unlocking rod to automatically reset through the inclined surface.

[0017] The unlocking rod and the locking pin are engaged by a bevel, which converts the squeezing action of the driven magnetic ring rising into the horizontal contraction motion of the locking pin. The structure is simple and there is no complicated multi-link transmission path, which reduces the risk of coal dust adhesion and jamming. The locking spring enables the locking pin assembly to have an automatic reset function after unlocking, without the need for manual restoration. This ensures that the device can automatically enter the next standby locking state after completing one drainage cycle, realizing fully automatic continuous operation.

[0018] As a further technical solution, the magnetic force between the second driven magnetic block and the driven magnetic ring is less than the magnetic force between the active magnetic ring and the driven magnetic ring.

[0019] By limiting the magnetic force between the second driven magnetic block and the driven magnetic ring to be less than the magnetic force between the master and slave magnetic rings, it is ensured that when the driven magnetic ring rises, it can drive the second driven magnetic block to rise and compress the spring to store energy. At the same time, after the rising stroke is completed, the driven magnetic ring can overcome the smaller magnetic force to continue rising and separate from the second driven magnetic block, thereby triggering the subsequent unlocking and spring release actions. During the descent, when the driven magnetic ring descends to the position of the second driven magnetic block, it can recouple with it, driving the second driven magnetic block to descend and reset, thus ensuring the integrity of the device's working cycle.

[0020] As a further technical solution, the sealing head is slidably installed on the top of the float via a sliding rod. When the float rises to its highest position, it pushes the sealing head to rise and seal the connection between the cyclone chamber and the water storage chamber. When the float falls to a certain height, the negative pressure balance valve opens, and the sealing head falls back to its original position under its own gravity.

[0021] The sealing head and the float are connected by a sliding rod. The rising of the sealing head is directly driven by the rising of the float, and the falling is entirely due to its own gravity, without any connecting rods, hinges, or external force. This minimizes the contact friction surface between moving parts and reduces the probability of coal powder jamming. During drainage, the negative pressure of the cyclone chamber acts on the sealing head through the connecting port, pressing the sealing head tightly against the connecting port. The greater the negative pressure, the tighter the seal, achieving a "self-tightening seal" using the system's own negative pressure without the need for an additional pressing mechanism. After the negative pressure balance valve is opened, the pressure in the water storage chamber and the cyclone chamber is balanced, and the sealing head automatically falls and resets due to its own gravity. The structure is simple and reliable, requiring no external power source. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an automatic dehydration device for a gas extraction pipeline according to the present invention; Figure 2 This is a cross-sectional view of the water storage chamber when the float is at its lowest position. Figure 3 yes Figure 2 The diagram shows the state of the device when it is in the water collection stage and the negative pressure balancing valve is closed. Figure 4 yes Figure 2 The diagram shows the state of the device when it is in the sealing stage and the vent valve is open. Figure 5 This is a schematic diagram of the assembly of the second lifting rod and the second driven magnetic block; Figure 6 This is a cross-sectional schematic diagram of the push-button locking pin assembly; Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the push-button locking assembly in the unlocked state. In the diagram: 1. Dehydrator; 11. Cyclone chamber; 111. Extraction pipe; 112. Gas discharge pipe; 12. Water storage chamber; 121. Drainage pipe; 122. One-way valve; 2. Active magnetic ring; 21. Float; 22. Sealing head; 23. Support; 24. Positioning sleeve; 25. Positioning column; 26. Sliding rod; 3. Driven magnetic ring; 31. Positioning rod; 4. Negative pressure balance pipe; 41. Negative pressure balance valve; 5. Vent pipe; 51. Vent valve; 6. First valve control mechanism; 61. First lifting mechanism. 611. Lowering rod; 612. Magnetic baffle; 613. First driven magnet; 64. First transmission gear; 65. First transmission rack; 76. Fixed magnet; 77. Second valve control mechanism; 78. Second lifting rod; 79. Second driven magnet; 70. Second transmission gear; 71. Second transmission rack; 72. Positioning stop; 73. Compression spring; 74. Press-type locking pin assembly; 75. Locking pin box; 76. Locking pin; 76. Locking spring; 76. Locking pin hole; 76. Unlocking rod. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Example 1 like Figures 1-4 As shown, the automatic dehydration device for gas extraction pipelines of the present invention includes a dehydrator 1, an active magnetic ring 2, a driven magnetic ring 3, a negative pressure balance pipe 4, a vent pipe 5, a first valve control mechanism 6, and a second valve control mechanism 7.

[0025] The dehydrator 1 has a cyclone chamber 11 above it and a water storage chamber 12 below it. The cyclone chamber 11 is a conical cylinder with a cone angle preferably between 10° and 75°. Multiple downwardly inclined extraction pipes 111 are provided on the side wall of the cyclone chamber 11. The inclination angle of the extraction pipes 111 is preferably between 10° and 30°, and the number of extraction pipes 111 is preferably 4 to 10, evenly arranged along the circumference of the cyclone chamber 11. The extraction pipes 111 are connected to external gas extraction branch pipes. A gas discharge pipe 12 is provided at the top center of the cyclone chamber 11, and the gas discharge pipe 12 is connected to the main extraction pipeline.

[0026] Under negative pressure, the mixed gas flow containing water and gas enters the cyclone chamber 11 at high speed through the tangentially downward inclined extraction pipe 111. It forms a rotating spiral airflow along the cylinder wall. Using centrifugal force, the denser water droplets and coal powder are thrown towards the cylinder wall. Under the action of gravity, they spiral down along the conical wall and enter the water storage chamber 12. The dry gas is drawn away by negative pressure through the top gas discharge pipe 12.

[0027] A drain pipe 121 is located at the center of the bottom of the water storage chamber 12. A one-way valve 122 is installed on the drain pipe 121. The one-way valve 122 only allows water and coal dust in the water storage chamber 12 to be discharged outward, preventing external air from being sucked back into the water storage chamber 12. During the water collection stage, the water storage chamber 12 is under negative pressure, and the one-way valve 122 is firmly held closed by the negative pressure. During the drainage stage, after the water storage chamber 12 is depressurized, the one-way valve 122 automatically opens to drain water under the action of water pressure.

[0028] Preferably, the components that come into direct contact with coal-containing water, such as the water storage chamber 12 and the extraction pipe 111, are made of 304 stainless steel to ensure a long service life in the humid and corrosive underground environment.

[0029] An active magnetic ring 2 is movably mounted inside the water storage chamber 12. A float 21, made of high-strength polystyrene foam, is located at the center of the active magnetic ring 2. The active magnetic ring 2 is fixedly connected to the float 21 via a bracket 23. A positioning sleeve 24 is provided on the bracket 23. The positioning sleeve 24 is slidably fitted onto a positioning post 25 fixed inside the water storage chamber 12, ensuring that the active magnetic ring 2 and the float 21 move vertically along the axial direction of the water storage chamber 12.

[0030] A sealing head 22 is slidably mounted on the top of the float 21 via multiple sliding rods 26. The sealing head 22 is used to seal the connection between the cyclone chamber 11 and the water storage chamber 12. The sealing head 22 is preferably a frustum-shaped structure, including a metal frame and a soft rubber sealing layer wrapped around the outside of the metal frame. The soft rubber sealing layer is made of nitrile rubber. When the float 21 rises to its highest position, it pushes the sealing head 22 upward, and the soft rubber sealing layer of the sealing head 22 presses against the sealing seat of the connection, cutting off the air and water passages between the cyclone chamber 11 and the water storage chamber 12. When the negative pressure balance valve 41 is opened, the pressure in the water storage chamber 12 and the cyclone chamber 11 is balanced, and the sealing head 22 descends and resets along the sliding rods 26 under its own gravity, reopening the connection.

[0031] The driven magnetic ring 3 is movably sleeved on the outside of the water storage cavity 12. Positioning rods 31 are evenly distributed around the outside of the water storage cavity 12. The driven magnetic ring 3 slides with the positioning rods 31, allowing the driven magnetic ring 3 to slide up and down along the water storage cavity 12. The driven magnetic ring 3 and the active magnetic ring 2 are magnetically coupled, and the two attract each other through magnetic penetration of the cylinder. The driven magnetic ring 3 rises and falls synchronously with the active magnetic ring 2.

[0032] The active magnetic ring 2 and the driven magnetic ring 3 include permanent magnets and non-magnetic isolation sleeves. In this embodiment, the permanent magnets are made of neodymium iron boron permanent magnet material to ensure sufficient magnetic coupling strength. The non-magnetic isolation sleeve is a ceramic isolation layer formed by thermal spraying or an oil-resistant rubber isolation layer formed by injection molding, used to prevent corrosion of the magnets by the humid environment and coal dust-containing media in the well, ensuring the long-term reliability of the magnetic transmission.

[0033] A negative pressure balancing pipe 4 is installed between the water storage chamber 12 and the cyclone chamber 11, connecting the two chambers. A negative pressure balancing valve 41 is installed on the negative pressure balancing pipe 4. When the negative pressure balancing valve 41 is open, the water storage chamber 12 and the cyclone chamber 11 are connected to each other through the negative pressure balancing pipe 4, and their pressures are balanced. When the negative pressure balancing valve 41 is closed, the air passage between the water storage chamber 12 and the cyclone chamber 11 is cut off, and they are sealed independently.

[0034] A vent pipe 5 is installed on the upper side of the water storage chamber 12, connecting the inside of the water storage chamber 12 with the outside atmosphere. An atmospheric vent valve 51 is installed on the vent pipe 5. When the atmospheric vent valve 51 is open, the inside of the water storage chamber 12 is connected to the outside atmosphere through the vent pipe 5, the negative pressure inside the water storage chamber 12 is released, and it returns to atmospheric pressure. When the atmospheric vent valve 51 is closed, the water storage chamber 12 is isolated from the outside atmosphere, and the water storage chamber 12 can be drawn into negative pressure through the negative pressure balance pipe 4.

[0035] As a preferred embodiment, the negative pressure balancing valve 41 and the atmospheric vent valve 51 are micro-opening valves, whose opening stroke only needs to meet the air passage opening and closing requirements, without needing to be fully open. This micro-opening method can shorten the valve switching time and reduce the driving energy requirement. As a further preferred embodiment, both the negative pressure balancing valve 41 and the atmospheric vent valve 51 are equipped with a miniature reducer at the drive end to amplify the driving torque and ensure that the valves can reliably open and close under the drive of the magnetic ring and spring.

[0036] The first valve control mechanism 6 is located on the outside of the water storage chamber 12. Its lower end is magnetically coupled to the driven magnetic ring 3, and its upper end is driven by the drive end of the negative pressure balance valve 41. When the driven magnetic ring 3 rises, it drives the first valve control mechanism 6 to operate and close the negative pressure balance valve 41; when the driven magnetic ring 3 falls, it drives the first valve control mechanism 6 to operate in the opposite direction and open the negative pressure balance valve 41.

[0037] The second valve control mechanism 7 is located on the other side outside the water storage chamber 12. Its lower end is magnetically coupled to the driven magnetic ring 3, and its upper end is driven by the drive end of the vent valve 51. When the driven magnetic ring 3 rises, the second valve control mechanism 7 stores energy but does not act immediately; when the driven magnetic ring 3 rises to the highest position, the second valve control mechanism 7 releases the stored energy after a delay, driving the vent valve 51 to open.

[0038] Preferably, the outer sides of the first valve control mechanism 6 and the second valve control mechanism 7 are provided with protective covers (not shown in the figure). The protective covers are fixedly installed on the cylinder of the water storage chamber 12 to protect the moving parts inside, so as to prevent underground coal dust, gravel and other debris from entering the transmission parts and ensure the reliability of the valve control mechanism in long-term operation.

[0039] The working principle is as follows: Water collection stage: The negative pressure balancing valve 41 is open, the water storage chamber 12 is connected to the cyclone chamber 11 under negative pressure through the negative pressure balancing pipe 4, and the atmospheric vent valve 51 is closed. After the water-containing gas in the extraction pipe 111 enters the cyclone chamber 11 and is separated, the water and coal powder fall into the water storage chamber 12 through the connecting port. The float 21 rises with the water level, driving the active magnetic ring 2 to rise, and the driven magnetic ring 3 rises synchronously. As the driven magnetic ring 3 rises, it drives the first valve control mechanism 6 to operate and closes the negative pressure balancing valve 41; then the driven magnetic ring 3 continues to rise, separates from the first valve control mechanism 6, and drives the second valve control mechanism 7 to operate through magnetic coupling, so that the second valve control mechanism 7 stores energy. Sealing stage: When the float 21 rises to its highest position, it pushes the sealing head 22 to seal the connection between the cyclone chamber 11 and the water storage chamber 12. The active magnetic ring 2 drives the driven magnetic ring 3 to reach its highest position. At this time, the second valve control mechanism 7 releases its stored energy after a delay, driving the atmospheric vent valve 51 to open.

[0040] Drainage Stage: After the second valve control mechanism 7 delays and controls the opening of the atmospheric vent valve 51, external air enters the water storage chamber 12 to relieve the negative pressure. The one-way valve 122 automatically opens under water pressure, discharging the water and coal dust from the water storage chamber 12. During the drainage process, the pressure difference between the cyclone chamber 11 and the water storage chamber 12 is used to press the sealing head 22 tightly against the connection port to maintain a seal.

[0041] Reset Phase: As water and coal dust are gradually discharged, the float 21 gradually descends, and the driven magnetic ring 3 descends accordingly. The descent of the driven magnetic ring 3 drives the second valve control mechanism 7 to gradually close the atmospheric vent valve 51, thereby disconnecting the water storage chamber 12 from the external environment. At this time, no negative pressure is established inside the water storage chamber 12, so water and coal dust continue to be discharged, and the continued descent of the driven magnetic ring 3 drives the first valve control mechanism 6 to gradually open the negative pressure balance valve 41, reconnecting the water storage chamber 12 and the cyclone chamber 11 under negative pressure. When the negative pressure in the water storage chamber 12 is the same as that in the cyclone chamber 11, the discharge of water and coal dust is complete. After the water storage chamber 12 is connected to the cyclone chamber 11, the sealing head 22 descends and resets under its own gravity, opening the connection between the cyclone chamber 11 and the water storage chamber 12, and the device enters the next round of water collection circulation.

[0042] Example 2 like Figures 1-4 As shown, this embodiment further defines the specific structure of the first valve control mechanism 6 based on embodiment 1.

[0043] The first valve control mechanism 6 includes a first lifting rod 61, a first transmission gear 62, a first transmission rack 63, and a fixed magnet 64. Preferably, the first lifting rod 61, the first transmission gear 62, and the first transmission rack 63 are made of 304 stainless steel to prevent corrosion and jamming caused by coal dust and moisture.

[0044] The first lifting rod 61 is movably mounted on one side of the water storage chamber 12 via two positioning sleeves. A magnetic baffle 611 is fixedly installed at the upper end of the first lifting rod 61, and a first driven magnetic block 612 is fixedly installed at the lower end of the first lifting rod 61. The first driven magnetic block 612 is magnetically coupled to the driven magnetic ring 3. When the driven magnetic ring 3 rises, it drives the first driven magnetic block 612 to rise synchronously, and when the driven magnetic ring 3 falls, it also drives the first driven magnetic block 612 to fall synchronously.

[0045] The first transmission gear 62 is mounted on the drive end of the negative pressure balance valve 41. The first transmission rack 63 is fixed to the first lifting rod 61 and meshes with the first transmission gear 62. When the first lifting rod 61 rises, the first transmission rack 63 drives the first transmission gear 62 to rotate in the forward direction, causing the negative pressure balance valve 41 to gradually close; when the first lifting rod 61 falls, the first transmission rack 63 drives the first transmission gear 62 to rotate in the reverse direction, causing the negative pressure balance valve 41 to gradually open.

[0046] The fixed magnet 64 is fixedly installed on the cylinder of the water storage chamber 12 by a bracket, located above the rising path of the magnetic baffle 611. When the first lifting rod 61 rises to the highest position, the magnetic baffle 611 is attracted to the fixed magnet 64. The fixed magnet 64 simultaneously limits the lifting height of the first lifting rod 61 to prevent it from rising excessively. Due to the attraction of the fixed magnet 64 to the magnetic baffle 611, the negative pressure balance valve 41 will not be accidentally opened due to vibration or gravity after it is closed.

[0047] The magnetic force between the first driven magnetic block 612 and the driven magnetic ring 3 is less than the magnetic force between the active magnetic ring 2 and the driven magnetic ring 3, and the magnetic force of the fixed magnet 64 is less than the magnetic force between the first driven magnetic block 612 and the driven magnetic ring 3.

[0048] This magnetic force hierarchy ensures the smooth execution of the following actions: When the driven magnetic ring 3 rises, it first drives the first driven magnetic block 612 and the first lifting rod 61 to rise through magnetic coupling. The first lifting rod 61 drives the first transmission gear 62 to rotate through the first transmission rack 63, causing the negative pressure balance valve 41 to gradually close. When the first lifting rod 61 rises to its highest position, the magnetic baffle 611 is attracted to the fixed magnet 64 and is limited to stop rising. The driven magnetic ring 3 continues to rise, but due to the limiting effect of the fixed magnet 64, the first lifting rod 61 cannot continue to rise, and the driven magnetic ring 3 separates from the first driven magnetic block 612, allowing the driven magnetic ring 3 to continue rising independently. At this time, the first lifting rod 61 is fixed in this position by the magnetic force of the fixed magnet 64.

[0049] When the driven magnetic ring 3 descends to the position of the first driven magnetic block 612, the two re-establish magnetic coupling. The driven magnetic ring 3 drives the first driven magnetic block 612 to descend synchronously, so that the magnetic baffle 611 can be smoothly separated from the fixed magnet 64. The first lifting rod 61 then falls. The first lifting rod 61 drives the first transmission gear 62 to rotate in the opposite direction through the first transmission rack 63, and the negative pressure balance valve 41 gradually opens.

[0050] Example 3 like Figures 3-7 As shown, this embodiment further defines the specific structure of the second valve control mechanism 7 based on embodiment 1.

[0051] The second valve control mechanism 7 includes a second lifting rod 71, a second transmission gear 72, a second transmission rack 73, a positioning block 74, a compression spring 75, and a push-type locking pin assembly 76. Preferably, the second lifting rod 71, the second transmission gear 72, the second transmission rack 73, the positioning block 74, the compression spring 75, and the push-type locking pin assembly 76 are made of 304 stainless steel to prevent corrosion and jamming caused by coal dust and moisture.

[0052] The second lifting rod 71 is movably mounted on the other side of the water storage chamber 12 via two positioning sleeves. A second driven magnetic block 711 is slidably fitted onto the lower end of the second lifting rod 71, and the second driven magnetic block 711 is magnetically coupled to the driven magnetic ring 3. This ensures that when the driven magnetic ring 3 rises, it drives the second driven magnetic block 711 to rise, and simultaneously, when the driven magnetic ring 3 descends, it drives the second driven magnetic block 711 to descend synchronously.

[0053] In this embodiment, the magnetic force between the second driven magnetic block 711 and the driven magnetic ring 3 is less than the magnetic force between the active magnetic ring 2 and the driven magnetic ring 3. This avoids the driven magnetic ring 3 from failing to separate properly due to excessive magnetic force between the second driven magnetic block 711 and the driven magnetic ring 3 when it descends, thus ensuring that the driven magnetic ring 3 can smoothly descend below the second driven magnetic block 711 and detach from it.

[0054] The second transmission gear 72 is mounted on the drive end of the vent valve 51. The second transmission rack 73 is fixed to the second lifting rod 71 and meshes with the second transmission gear 72. When the second lifting rod 71 rises, the second transmission rack 73 drives the second transmission gear 72 to rotate, thereby opening the vent valve 51; when the second lifting rod 71 falls, the second transmission rack 73 drives the second transmission gear 72 to rotate in the opposite direction, thereby closing the vent valve 51.

[0055] The positioning block 74 is fixed to the lower side of the second lifting rod 71. The compression spring 75 is fitted onto the second lifting rod 71, located between the positioning block 74 and the second driven magnet 711, and is embedded in the spring groove of the second driven magnet 711.

[0056] The push-button locking pin assembly 76 is located outside the water storage chamber 12 and engages with the positioning stop 74 to lock or release the second lifting rod 71. Figure 6 and Figure 7 As shown, the push-button locking pin assembly 76 includes a locking pin box 761, a locking pin 762, a locking spring 763, a locking pin hole 764, and an unlocking lever 765.

[0057] The locking pin box 761 is fixedly installed on the upper side of the other side of the water storage chamber 12. The locking pin 762 is telescopically located at the center of the side surface of the locking pin box 761. A locking spring 763 is fitted inside the locking pin 762, which drives the locking pin 762 to automatically pop out. The locking pin hole 764 is formed on the side surface of the positioning block 74, corresponding to the position of the locking pin 762.

[0058] The unlocking lever 765 is telescopically located at the center of the lower surface of the locking pin box 761.

[0059] The unlocking lever 765 and the locking pin 762 are engaged by a bevel: when the unlocking lever 765 is compressed and retracted, its bevel pushes the locking pin 762 to overcome the elastic force of the locking spring 763 and retract into the locking pin box 761, causing the locking pin 762 to disengage from the locking pin hole 764 of the positioning block 74 and releasing the second lifting lever 71; after the compression force on the unlocking lever 765 is released, the locking pin 762 automatically pops out and resets under the action of the locking spring 763, and the unlocking lever 765 automatically pops out through the bevel engagement.

[0060] The delayed opening method of the atmospheric vent valve 51 is as follows: After the driven magnetic ring 3 rises to the position of the second driven magnetic block 711, it drives the second driven magnetic block 711 to slide upward along the second lifting rod 71 through magnetic coupling. When the second driven magnetic block 711 rises, it compresses the compression spring 75, causing the compression spring 75 to be gradually compressed and store energy. During this process, the second lifting rod 71 is locked by the locking pin 762 of the press-type locking pin assembly 76 and remains stationary.

[0061] When the driven magnetic ring 3 continues to rise to its highest position, it presses upward against the unlocking rod 765, causing it to retract into the locking pin box 761. This, in turn, drives the locking pin 762 to retract and move out of the locking pin hole 764, releasing the second lifting rod 71. At this time, the compression spring 75 releases its elastic force, driving the second lifting rod 71 to rise. The second lifting rod 71 drives the second transmission gear 72 to rotate via the second transmission rack 73, causing the atmospheric vent valve 51 to gradually open.

[0062] Because the energy storage process of the compression spring 75 occurs during its stroke before the driven magnetic ring 3 rises to its highest position, while the release action only occurs after the driven magnetic ring 3 reaches its highest position, the opening of the vent valve 51 has a "delayed" effect relative to the rising action of the driven magnetic ring 3. This delay ensures that before the vent valve 51 opens, the sealing head 22 has already sealed the connection port and the negative pressure balance valve 41 has already closed, ensuring that outside air does not enter the extraction system during the drainage process.

[0063] When the driven magnetic ring 3 descends, it drives the second driven magnetic block 711 to descend along the second lifting rod 71. After the second driven magnetic block 711 descends to the lowest position, the limiting structure on the second lifting rod 71 separates the driven magnetic ring 3 from the second driven magnetic block 711. The second lifting rod 71 then descends and resets under the action of gravity, the atmospheric valve 51 closes, and it waits for the next working cycle.

Claims

1. An automatic dehydration device for gas extraction pipelines, characterized in that, include: The dewatering device has a cyclone chamber at the top and a water storage chamber at the bottom. The cyclone chamber has multiple tangentially downward inclined extraction pipes on its side wall, a gas discharge pipe at the top center, and a drain pipe at the bottom of the water storage chamber with a one-way valve installed on it. An active magnetic ring is installed in the water storage chamber in a height-adjustable manner. A float is installed at the center of the ring, and a sealing head for sealing the connection between the cyclone chamber and the water storage chamber is installed on the top of the float in a sliding and height-adjustable manner. The driven magnetic ring is vertically mounted outside the water storage chamber and magnetically coupled to the active magnetic ring, moving up and down synchronously with it. A negative pressure balancing pipe is installed between the water storage chamber and the cyclone chamber, and a negative pressure balancing valve is installed on it. A vent pipe is installed on the water storage chamber, and a vent valve is installed on it. The first valve control mechanism, which moves up and down synchronously with the driven magnetic ring, is used to control the opening and closing of the negative pressure balance valve. The second valve control mechanism rises and falls synchronously with the driven magnetic ring, and is used to control the opening and closing of the atmospheric valve after the driven magnetic ring rises to the highest position.

2. The automatic dehydration device for a gas extraction pipeline according to claim 1, characterized in that, Both the active and driven magnetic rings are covered with a non-magnetic insulating sleeve, which is a ceramic layer or an oil-resistant rubber layer.

3. The automatic dewatering device for a gas extraction pipeline according to claim 1, characterized in that, The first valve control mechanism includes: The first lifting rod is installed on one side outside the water storage chamber. A magnetic baffle is installed at its upper end and a first driven magnetic block is installed at its lower end. The first driven magnetic block is magnetically coupled to the driven magnetic ring. The first transmission gear is installed on the drive end of the negative pressure balance valve; The first transmission rack is fixed on the first lifting rod and meshes with the first transmission gear; A fixed magnet is mounted on the cylinder of the water storage chamber via a bracket to attract the magnetic baffle and limit the lifting height of the first lifting rod.

4. An automatic dehydration device for a gas extraction pipeline according to claim 3, characterized in that, The magnetic force between the first driven magnetic block and the driven magnetic ring is less than the magnetic force between the active magnetic ring and the driven magnetic ring, and the magnetic force of the fixed magnet is less than the magnetic force between the first driven magnetic block and the driven magnetic ring.

5. An automatic dewatering device for a gas extraction pipeline according to claim 1, characterized in that, The second valve control mechanism includes: The second lifting rod is mounted on the other side of the outside of the water storage chamber and can be lifted and lowered. A second driven magnetic block is slidably fitted on its lower end. The second driven magnetic block is magnetically coupled to the driven magnetic ring. The second transmission gear is installed on the drive end of the vent valve; The second transmission rack is fixed on the second lifting rod and meshes with the second transmission gear; A positioning block is fixed to the lower side of the second lifting rod; A compression spring is fitted onto the second lifting rod and positioned between the positioning block and the second driven magnet. The push-type locking pin assembly is located outside the water storage chamber and is inserted into the positioning block to lock or release the second lifting rod.

6. An automatic dewatering device for a gas extraction pipeline according to claim 5, characterized in that, The push-type locking pin assembly includes: Locking pin box, installed on the upper side of the other side of the water storage cavity; The locking pin is telescopically located at the center of the side surface of the locking pin box, and its inner end is fitted with a locking spring to drive the locking pin to pop out automatically. The locking pin hole is formed on the side surface of the positioning block and corresponds to the position of the locking pin; The unlocking lever is telescopically located at the center of the lower surface of the lock pin box. It is engaged with the lock pin by a bevel and is used to drive the lock pin to retract and unlock. When the unlocking rod is squeezed and retracted, its inclined surface pushes the locking pin to overcome the elastic force of the locking spring and retract into the locking pin box, causing the locking pin to disengage from the locking pin hole of the positioning block and releasing the second lifting rod; After the pressure on the unlocking rod is released, the locking pin automatically pops out under the action of the locking spring, and pushes the unlocking rod to automatically reset through the inclined surface.

7. An automatic dehydration device for a gas extraction pipeline according to claim 5, characterized in that, The magnetic force between the second driven magnetic block and the driven magnetic ring is less than the magnetic force between the active magnetic ring and the driven magnetic ring.

8. An automatic dewatering device for a gas extraction pipeline according to claim 1, characterized in that, The sealing head is slidably installed on the top of the float via a sliding rod. When the float rises to its highest position, it pushes the sealing head to rise and seal the connection between the cyclone chamber and the water storage chamber. When the float falls to a certain height, the negative pressure balance valve opens, and the sealing head falls back to its original position under its own gravity.

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