A drilling mud filtration device

Abstract

This invention relates to the field of mud filtration technology and discloses a drilling mud filtration device, including a support frame, a filter box, a mud inlet pipe, a mud outlet pipe, and a slag discharge trough. The filter box contains a filter, with a mud inlet and a slag outlet at its front and rear ends, respectively. The bottom of the filter box is connected to the mud outlet pipe. Two baffles are provided inside the filter box, dividing the gap between the filter and the filter box into a conveying channel. The conveying channel is connected to the mud inlet and the slag outlet. A cleaning mechanism is provided at the slag outlet, which cleans the secondary filter screen using high-frequency vibration and pulse flushing. A pushing mechanism is provided at the conveying channel, which oscillates and pushes the particulate material at the top of the conveying channel. The drilling mud filtration device provided by this invention improves filtration efficiency, self-cleaning ability, and resource utilization efficiency through the effective combination of multi-stage filtration, self-cleaning, and a rotating filter.

Description

Technical Field

[0001] This invention relates to the field of mud filtration technology, specifically to a drilling mud filtration device. Background Technology

[0002] In drilling operations, water drilling and air drilling are two main operating methods. Air drilling mainly relies on compressed air to cool the drill bit and carry rock cuttings, and has a lower dependence on water resources. Water drilling, on the other hand, uses mud to achieve functions such as cooling the drill bit, lubricating the drilling tools, and carrying rock cuttings. In environments with complex geological conditions or high drilling accuracy requirements, water drilling is often the preferred operating method. However, in some specific environments with scarce water resources, if water drilling is used, the problem of reusing mud must be faced.

[0003] Some existing mud filtration devices have certain advantages in this environment, such as the ability to perform preliminary filtration of larger particles in the mud, which to some extent ensures the basic operation of drilling. However, these devices still have significant shortcomings. On the one hand, their filtration efficiency is low, and multi-stage filtration systems are prone to clogging during operation, especially the filter screen. Once clogged, it will seriously affect the filtration effect and recycling efficiency of the mud. On the other hand, the design of the slag removal mechanism is not reasonable, and the problem of poor slag removal is prominent. This not only requires frequent manual cleaning, increasing operating costs and labor intensity, but may also cause the operation of the entire filtration device to be hindered due to untimely slag removal. In addition, the mud recycling rate is low, and a large amount of insufficiently filtered mud is directly discharged, which not only wastes water resources but may also have adverse effects on the environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned difficulties and provide a drilling mud filtration device.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a drilling mud filtration device, including a support frame, a filter box, a mud inlet pipe, a mud outlet pipe and a slag discharge trough on the support frame, and a filter is provided in the filter box; The filter includes an upper ring platform and a lower ring platform, which are rotatably mounted inside the filter box. Multiple connecting plates are connected between the upper and lower ring platforms, and a secondary filter screen is provided between adjacent connecting plates. A slurry collection platform is provided at the bottom of the lower ring platform, which is rotatably connected to the slurry outlet pipe. The filter box has a slurry inlet and a slag outlet connected to the slurry inlet pipe and the slag outlet platform, respectively, at the front and rear ends. The bottom of the filter box is connected to the slurry outlet pipe. The filter box has baffles at the slurry inlet and slag outlet on the inside. The baffles are in contact with the connecting plate. The two baffles divide the gap between the filter and the filter box into a conveying channel. The conveying channel is connected to the slurry inlet and the slag outlet. A cleaning mechanism is installed at the slag outlet. The cleaning mechanism cleans the secondary filter screen inside the filter through high-frequency vibration and pulse flushing. A pushing mechanism is installed at the conveying channel. The pushing mechanism pushes the granular material accumulated at the top of the conveying channel in an oscillating manner.

[0006] As an improvement: the cleaning mechanism includes a fixed platform and a hanging column. The fixed platform is fixed to the mounting slot at the top of the filter box. The hanging column is located inside the filter and its top is connected to the fixed platform. A second motor is provided on the fixed platform. A transmission shaft driven by the second motor is rotatably provided inside the hanging column. An eccentric shaft is provided on the transmission shaft. A cleaning plate is movably provided on the hanging column. A transmission rod is hinged between the cleaning plate and the eccentric shaft.

[0007] As an improvement: the hanging column is provided with a guide plate facing the slag outlet, the cleaning plate is radially slidably disposed inside the guide plate, multiple impact heads are elastically connected to the cleaning plate, multiple flushing heads are provided on the cleaning plate, and a conveying pipe connected to the multiple flushing heads is provided on the top of the cleaning plate, and the conveying pipe is connected to an external water supply device.

[0008] As an improvement: the top of the upper ring platform is provided with a gear ring, the output end of the second motor is provided with a gear that meshes with the gear ring, a bevel gear is coaxially connected to one side of the gear, and a bevel gear is provided at the top of the transmission shaft that meshes with the bevel gear.

[0009] As an improvement: the pushing mechanism includes a third motor, a swing arm, a fan-shaped platform, and a pusher. The third motor is fixed to the top of the filter box and drives the swing arm to swing. One end of the swing arm is provided with a connecting shaft connected to the fan-shaped platform. The connecting shaft is rotatably engaged with the through hole at the top of the filter box. The pusher is provided with multiple sliding holes and slides in the sliding holes. The bottom of the pusher extends into the conveying channel.

[0010] As an improvement: the pusher includes an upper slide rod and a lower lever. The top of the lower lever is provided with a slide platform that slides in conjunction with the inner groove of the upper slide rod. The slide platform is provided with a spring connected to the upper slide rod. The top of the upper slide rod is provided with a positioning rod. The top of the filter box is provided with an arc-shaped platform. The arc-shaped platform is provided with multiple obliquely arranged guide grooves. The positioning rod slides in conjunction with the guide grooves.

[0011] As an improvement: the motor has a turntable at its three output ends, a drive rod at the eccentric part of the turntable, and a straight groove on the swing arm that slides with the drive rod.

[0012] As an improvement: an inclined plate is provided on the inner side of the slag discharge trough at the slag outlet, and a vibrating plate is hinged below the inclined plate. A motor is provided on the outer side of the slag discharge trough, and a drive shaft is provided at the output end of the motor. The drive shaft extends into the inner side of the slag discharge trough and is provided with multiple cams that cooperate with the vibrating plate. A crossbeam that cooperates with the vibrating plate is provided on the inner side of the slag discharge trough. A three-stage filter screen is provided on the vibrating plate. A liquid collection tank is provided below the three-stage filter screen of the slag discharge trough. The bottom of the liquid collection tank is connected to the slurry outlet pipe through a liquid discharge pipe.

[0013] As an improvement: a primary filter screen is provided inside the slurry inlet pipe, and a collection box is provided at the bottom of the slurry inlet pipe. The collection box is connected to the slurry inlet pipe and the connection point is located in front of the primary filter screen.

[0014] The beneficial effects of this invention compared to existing technologies are as follows: The drilling mud filtration device provided by this invention effectively improves filtration efficiency and self-cleaning ability through the effective combination of multi-stage filtration, self-cleaning, and rotary filters, avoiding the problem of decreased filtration capacity caused by mesh blockage, and improving resource utilization efficiency. Specifically: 1. Multi-stage filtration improves precision and efficiency. A primary filter screen is installed inside the slurry inlet pipe to pre-intercept large particles of impurities, reducing the burden on subsequent filtration. A secondary filter screen in the filter box, combined with the connecting plate and baffle forming a conveying channel, achieves efficient solid-liquid separation. A tertiary filter screen in the slag discharge tank performs secondary filtration on the discharged particulate material, recovering residual slurry. This multi-stage filtration structure significantly improves slurry filtration precision while preventing a single filter screen from clogging due to excessive load, ensuring stable filtration efficiency. 2. A self-cleaning mechanism is adopted to prevent filter screen clogging. The cleaning mechanism is driven by a motor-driven transmission shaft. The cooperation of the eccentric shaft and the transmission rod makes the cleaning plate drive the impact head to slide radially, impacting the inner side of the filter screen at high frequency. Combined with the pulse water flow of the flushing head, it achieves a dual cleaning effect of vibration and flushing. This design can remove particulate impurities in the filter screen pores in time, avoid filter screen clogging, and, together with the rotatable filter, ensure the long-term stable filtration performance of the secondary filter screen at the pulp inlet, reducing manual maintenance costs. 3. The pushing mechanism at the conveying channel is driven by a three-motor turntable, which drives the pusher to swing in a fan shape via a crank-slider mechanism. At the same time, the positioning rod and the guide groove cooperate to make the pusher axially displace, effectively pushing the granular material accumulated at the top of the conveying channel toward the slag outlet. The vibrating plate in the slag discharge trough vibrates at high frequency under the action of the cam driven by a one-motor motor. With the help of a three-stage filter screen, the solid particles and residual slurry are quickly separated and discharged smoothly. This dual slag discharge design completely solves the problem of poor slag discharge and ensures the continuous operation of the device. 4. The slurry collection tank of the slag discharge platform is connected to the slurry outlet pipe through the slurry discharge pipe. The recovered mud is filtered in three stages and then re-enters the mainstream of filtered mud, avoiding water waste and reducing the cost of drilling operations. In water-scarce environments, this design significantly improves the environmental adaptability and resource utilization of the equipment, meeting the requirements of green operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0017] Figure 3 This is a cross-sectional view of the main structure of the present invention. Figure 1 .

[0018] Figure 4 This is a cross-sectional view of the main structure of the present invention. Figure 2 .

[0019] Figure 5 This is a cross-sectional view of the main structure of the present invention. Figure 3 .

[0020] Figure 6 This is a schematic diagram of the filter box of the present invention.

[0021] Figure 7 This is a cross-sectional view of the filter box of the present invention.

[0022] Figure 8 This is a cross-sectional view of the slurry inlet pipe of the present invention.

[0023] Figure 9 This is a schematic diagram of the slag discharge trough platform of the present invention.

[0024] Figure 10 This is a cross-sectional view of the slag discharge trough platform of the present invention.

[0025] Figure 11 This is a cross-sectional view of the filter of the present invention.

[0026] Figure 12 This is a schematic diagram of the cleaning mechanism of the present invention.

[0027] Figure 13 This is an exploded view of the cleaning mechanism of the present invention.

[0028] Figure 14 This is a schematic diagram of the cleaning plate of the present invention.

[0029] Figure 15 This is a schematic diagram of the material pushing mechanism of the present invention.

[0030] Figure 16 This is an exploded view of the feeding mechanism of the present invention.

[0031] Figure 17 This is a schematic diagram of the pusher structure of the present invention.

[0032] Figure 18 This is a cross-sectional view of the feeder of the present invention.

[0033] As shown in the figure: 1. Support frame; 2. Filter box; 3. Slurry inlet pipe; 4. Slurry outlet pipe; 5. Slag discharge trough; 6. Filter; 7. Cleaning mechanism; 8. Pushing mechanism; 21. Slurry inlet; 22. Slag outlet; 23. Baffle; 24. Conveying channel; 25. Arc-shaped platform; 26. Guide trough; 27. Installation trough; 31. Primary filter screen; 32. Collection box; 51. Inclined plate; 52. Vibrating plate; 53. Motor 1; 54. Drive shaft; 55. Cam; 56. Tertiary filter screen; 57. Crossbeam; 58. Liquid collection trough; 59. Drain pipe; 61. Upper ring platform; 62. Lower ring platform; 63. Connecting plate; 64. Secondary filter screen; 65. Toothed ring; 66. Ring plate; 67. Slurry collection platform; 71. Fixed platform; 72. Hanging column; 721. Guide plate; 73. Motor II; 731. Gear; 732. Bevel gear I; 74. Drive shaft; 741. Bevel gear II; 742. Eccentric shaft; 75. Cleaning plate; 751. Impact head; 752. Flushing head; 753. Conveying pipe; 76. Transmission rod; 81. Motor III; 82. Turntable; 821. Drive rod; 83. Swing arm; 831. Straight groove; 832. Connecting shaft; 84. Sector platform; 841. Sliding hole; 85. Pusher; 851. Upper sliding rod; 852. Positioning rod; 853. Lower lever; 854. Slide table; 855. Spring. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings.

[0035] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, a drilling mud filtration device includes a support frame 1, on which a filter box 2, a mud inlet pipe 3, a mud outlet pipe 4, and a slag discharge trough 5 are mounted. A filter 6 is installed inside the filter box 2. The filter box 2 has a mud inlet 21 and a slag outlet 22 at its front and rear ends, respectively, which are connected to the mud inlet pipe 3 and the slag discharge trough 5. The bottom of the filter box 2 is connected to the mud outlet pipe 4. Baffles 23 are installed inside the filter box 2 at both the mud inlet 21 and the slag outlet 22. The two baffles 23 divide the gap between the filter 6 and the filter box 2 into a conveying channel 24, which communicates with the mud inlet 21 and the slag outlet 22. A cleaning mechanism 7 is installed at the slag outlet 22. The cleaning mechanism 7 cleans the secondary filter screen 64 inside the filter 6 through high-frequency vibration and pulse flushing. A pushing mechanism 8 is installed at the conveying channel 24, which oscillates and pushes the granular material accumulated on the top of the conveying channel 24.

[0036] Combined with appendix Figure 5 and attached Figure 11As shown, the filter 6 includes an upper ring platform 61 and a lower ring platform 62, which are rotatably mounted inside the filter box 2. Multiple connecting plates 63 are connected between the upper ring platform 61 and the lower ring platform 62. A secondary filter screen 64 is provided between adjacent connecting plates 63. The outer diameter of the connecting plate 63 is larger than the outer diameter of the secondary filter screen 64. A ring plate 66 is provided on the outer side of the lower ring platform 62. The ring plate 66 is located below the conveying channel 24. A slurry collecting platform 67 is provided at the bottom of the lower ring platform 62 and is rotatably connected to the slurry outlet pipe 4. The baffle 23 is in contact with the connecting plate 63.

[0037] To address the problems of easy clogging of filter screens, poor slag discharge, and low filtration efficiency in traditional mud filtration devices, this drilling mud filtration device achieves high-efficiency filtration and self-cleaning functions through a unique structural design and collaborative working mechanism. Its core structure includes a filter box 2, a mud inlet pipe 3, a mud outlet pipe 4, a slag discharge trough 5, a filter 6, a cleaning mechanism 7, and a material pushing mechanism 8.

[0038] The filter box 2 serves as the main body, with the slurry inlet 21 and slag outlet 22 at the front and rear ends connected to the slurry inlet pipe 3 and the slag outlet platform 5, respectively. The bottom is connected to the slurry outlet pipe 4. Baffles 23 installed at the slurry inlet 21 and slag outlet 22 inside the box divide the gap between the filter 6 and the inner wall of the filter box 2 into a conveying channel 24. The filter consists of an upper ring platform 61, a lower ring platform 62, a connecting plate 63, and a secondary filter screen 64. The upper ring platform 61 and the lower ring platform 62 are rotatably installed inside the filter box 2. The connecting plate 63 connects the upper and lower ring platforms, and its outer diameter is larger than that of the secondary filter screen 64, allowing it to make tight contact with the baffle 23 to prevent slurry leakage and guide solid particles into the conveying channel. Channel 24; the secondary filter screen 64 is responsible for intercepting solid particles in the slurry. The ring plate 66 on the outer side of the lower ring platform 62 is located below the conveying channel 24 to receive the filtered solid particles. The bottom slurry collection platform 67 is rotatably connected to the slurry outlet pipe 4 to ensure smooth slurry flow. The cleaning mechanism 7 at the slag outlet 22 uses high-frequency vibration and pulse flushing to clean the secondary filter screen 64, destroying the particles attached to the filter screen surface and removing pore impurities to prevent clogging of the mesh of the secondary filter screen 64. The pushing mechanism 8 at the conveying channel 24 pushes the granular material accumulated at the top of the channel in an oscillating manner to avoid material accumulation that hinders the rotation of the filter 6 and the discharge of granular material.

[0039] During operation, the slurry enters the filter box 2 from the slurry inlet pipe 3 through the slurry inlet 21. Under the action of the secondary filter screen 64 of the filter 6, the liquid slurry flows through the filter screen into the slurry collection platform 67 and is discharged through the slurry outlet pipe 4. Solid particles are intercepted on the outside of the filter screen. As the filter rotates, the particles are pushed by the outer edge of the connecting plate 63 and driven by the ring plate 66, and sent through the conveying channel 24 to the slag outlet 22 and discharged into the slag discharge trough platform 5. The pushing mechanism 8 periodically swings to assist in pushing the top particles. At the same time, the cleaning mechanism 7 performs high-frequency vibration and rinsing on the inside of the filter screen at the slag outlet 22 to continuously ensure the cleanliness of the filter screen and ensure that the entire filtration process operates efficiently and stably.

[0040] When the mud flows through the inlet 21, the baffle 23 at the inlet 21 can make close contact with at least two connecting plates 63 and will not flow into the gap behind the baffle 23. Most of the mud will be filtered by the secondary filter screen 64 and flow into the collection platform 67. A small part of the mud will flow in the conveying channel 24 with the filtered solid particles. The mud in the conveying channel 24 will be filtered by the secondary filter screen 64 and flow into the collection platform 67 as it moves with the solid particles. After the solid particles move to the slag outlet 22, they carry very little liquid. The solid particles enter the slag discharge trough 5 under the obstruction of the baffle 23 at the slag outlet 22.

[0041] Combined with appendix Figure 3 Appendix Figure 6 Appendix Figure 12 and attached Figure 13 As shown, the cleaning mechanism 7 includes a fixed platform 71 and a hanging column 72. The fixed platform 71 is fixed to the mounting groove 27 on the top of the filter box 2. The hanging column 72 is located inside the filter 6 and its top is connected to the fixed platform 71. A second motor 73 is provided on the fixed platform 71. A transmission shaft 74 driven by the second motor 73 is rotatably provided inside the hanging column 72. An eccentric shaft 742 is provided on the transmission shaft 74. A cleaning plate 75 is movably provided on the hanging column 72. A transmission rod 76 is hinged between the cleaning plate 75 and the eccentric shaft 742.

[0042] Combined with appendix Figure 13 and attached Figure 14 As shown, the hanging column 72 is provided with a guide plate 721 facing the slag outlet 22. The cleaning plate 75 is radially slidably disposed inside the guide plate 721. Multiple impact heads 751 are elastically connected to the cleaning plate 75. Multiple flushing heads 752 are provided on the cleaning plate 75. The top of the cleaning plate 75 is provided with a conveying pipe 753 that communicates with the multiple flushing heads 752. The conveying pipe 753 is connected to an external water supply device.

[0043] Combined with appendix Figure 11 and attached Figure 13 As shown, the upper ring platform 61 is provided with a toothed ring 65 at its top, and the output end of the motor 2 73 is provided with a gear 731 that meshes with the toothed ring 65. A bevel gear 732 is coaxially connected to one side of the gear 731, and a bevel gear 741 that meshes with the bevel gear 732 is provided at the top of the transmission shaft 74.

[0044] To further improve the cleaning effect of the secondary filter screen 64, this device has made targeted improvements to the cleaning mechanism 7. By combining mechanical transmission with rinsing, it achieves efficient cleaning of the filter screen and solves the problem of filter screen clogging.

[0045] The core structure of the cleaning mechanism 7 consists of a fixed platform 71, a hanging column 72, a second motor 73, a transmission shaft 74, a cleaning plate 75, and related transmission components. The fixed platform 71 is stably installed in the mounting groove 27 on the top of the filter box 2, serving as the support base for the entire cleaning mechanism. The hanging column 72 is vertically installed inside the filter 6, with its top connected to the fixed platform 71, providing installation space for the internal transmission components. The second motor 73 is fixed on the fixed platform 71, and its output gear 731 meshes with the gear ring 65 on the top of the upper ring platform 61, thereby establishing a linkage between the cleaning mechanism 7 and the filter 6. At the same time, the first bevel gear 732, coaxially connected to one side of the gear 731, meshes with the second bevel gear 741 on the top of the transmission shaft 74. When the second motor 73 starts, the power drives the filter 6 to rotate through the gear transmission, and at the same time drives the transmission shaft 74 to rotate through the bevel gear transmission.

[0046] During operation, motor 73 drives filter 6 to rotate within filter box 2 via gear transmission, ensuring that the secondary filter screen 64 at the slurry inlet 21 remains clean and maintains its filtration capacity. Simultaneously, motor 73 drives transmission shaft 74 to rotate via bevel gear transmission, causing eccentric shaft 742 to move accordingly. Through hinged transmission rod 76, it drives cleaning plate 75 to slide radially inside guide plate 721. Multiple impact heads 751 elastically connected to cleaning plate 75 periodically impact the inner surface of secondary filter screen 64 during sliding, using the impact force generated by high-frequency vibration to break the adhesion between particles and filter screen, causing the attached solid particles to loosen and fall off. In addition, multiple flushing heads 752 arranged on cleaning plate 75 are connected to an external water supply device via delivery pipe 753. During operation, water is sprayed from flushing heads 752 through delivery pipe 753 in a pulsed manner, powerfully flushing the filter screen pores and thoroughly removing loose particles.

[0047] During operation, after motor 73 starts running, it drives filter 6 to rotate, causing each area of ​​the secondary filter screen 64 to pass under the cleaning plate 75 in sequence, ensuring that the filter screen is thoroughly cleaned. On the other hand, the drive shaft 74, through the cooperation of the eccentric shaft 742 and the drive rod 76, causes the cleaning plate 75 to slide radially back and forth. Combined with the directional spray of the rinsing head 752, it achieves a dual cleaning effect of vibration and rinsing. The guide plate 721 guides and limits the sliding of the cleaning plate 75, ensuring that the cleaning action is precise and stable. The elastically connected impact head 751 provides cushioning during vibration to avoid damage to the filter screen. This structural design not only improves cleaning efficiency but also reduces additional power consumption through mechanical linkage, ensuring the long-term stable operation of the filtration device.

[0048] Combined with appendix Figure 4 Appendix Figure 15 and attached Figure 16As shown, the feeding mechanism 8 includes a motor 81, a swing arm 83, a fan-shaped platform 84, and a feeder 85. The motor 81 is fixed to the top of the filter box 2. The output end of the motor 81 is provided with a turntable 82. The turntable 82 is provided with a drive rod 821 at its eccentric position. The swing arm 83 is provided with a straight groove 831 that slides with the drive rod 821. One end of the swing arm 83 is provided with a connecting shaft 832 that connects to the fan-shaped platform 84. The connecting shaft 832 rotates with the through hole at the top of the filter box 2. The feeder 85 is provided with multiple sliding holes 841. The feeder 85 slides in the sliding holes 841, and the bottom of the feeder 85 extends into the conveying channel 24.

[0049] Combined with appendix Figure 6 Appendix Figure 16 Appendix Figure 17 and attached Figure 18 As shown, the pusher 85 includes an upper slide rod 851 and a lower lever 853. The top of the lower lever 853 is provided with a slide table 854 that slides in cooperation with the inner groove of the upper slide rod 851. The slide table 854 is provided with a spring 855 connected to the upper slide rod 851. The top of the upper slide rod 851 is provided with a positioning rod 852. The top of the filter box 2 is provided with an arc-shaped platform 25. The arc-shaped platform 25 is provided with a plurality of obliquely arranged guide grooves 26. The positioning rod 852 slides in cooperation with the guide grooves 26.

[0050] To address the issue of slag discharge obstruction caused by particulate material accumulation in the conveying channel 24, solid particles accumulate in the channel when the slurry input flow rate is too high or the solid particle content in the slurry is too high. The movement of solid particles in the conveying channel 24 mainly relies on the pushing of the outer edge of the connecting plate 63 and the driving of the ring plate 66. Excessive accumulation will increase the rotational load on the filter 6 and cause the filter 6 to jam. To address this problem, the pushing mechanism 8 has been innovatively designed, adopting an innovative design that combines oscillating pushing with elastic vibration to assist in pushing the solid particles at the top layer of accumulation in the conveying channel 24, thereby achieving efficient slag discharge.

[0051] The mechanism uses motor 3 81 as the power source and is fixed to the top of filter box 2. The drive rod 821 is set at the eccentric part of the turntable 82 at its output end, which slides in cooperation with the straight groove 831 on the swing arm 83 to form a crank-slider mechanism. When motor 3 81 drives the turntable 82 to rotate, the drive rod 821 slides in the straight groove 831, forcing the swing arm 83 to swing back and forth around the connecting shaft 832. The connecting shaft 832 rotates in cooperation with the through hole at the top of the filter box 2 to ensure the stability of the swing.

[0052] The swing of the swing arm 83 is transmitted to the sector table 84 through the connecting shaft 832, which drives the pusher 85 to swing periodically in the conveying channel 24. The top of the upper slide rod 851 of the pusher 85 is provided with a positioning rod 852, which slides in cooperation with the inclined guide groove 26 on the arc-shaped platform 25 at the top of the filter box 2. When the pusher 85 swings with the sector table 84, the positioning rod 852 slides in the guide groove 26, forcing the pusher 85 to produce axial displacement. The lower lever 853 is slidably connected to the inner groove of the upper slide rod 851 through the slide table 854 and is elastically supported by the spring 855, so that the lower lever 853 can also move axially while swinging with the upper slide rod 851.

[0053] During operation, motor 81 drives turntable 82 to rotate, converting the circular motion into the reciprocating oscillation of swing arm 83 via crank-slider mechanism. This, in turn, drives pusher 85 to oscillate in a fan shape within conveying channel 24. During the oscillation, the engagement of positioning rod 852 and guide groove 26 causes radial displacement of pusher 85. As pusher 85 moves from slurry inlet 21 towards slag outlet 22, positioning rod 852 slides downward in the inclined guide groove 26, causing pusher 85 to move downward. This causes lower lever 853 to move downward and insert into the solid particles. As lower lever 853 moves, it pushes the upper solid particles towards slag outlet 22. When the filter 85 resets, the pusher 85 rises. The rotation speed of the pusher 85 is higher than that of the filter 6, so that the lower lever 853 will not come into contact with solid particles when the pusher 85 resets, and there is enough room for it to rise. The lower lever 853 is connected to the upper sliding rod 851 by a spring 855, so that the lower lever 853 has a certain elastic floating space, avoiding damage to the positioning rod 852 and the guide groove 26 during the downward movement of the lower lever 853 due to the obstruction of solid particles. The pushing mechanism 8 realizes the auxiliary pushing of the upper particulate material in the conveying channel 24, which significantly improves the overall working efficiency and stability of the filtration device.

[0054] Combined with appendix Figure 3 Appendix Figure 7 Appendix Figure 9 and attached Figure 10 As shown, the inner side of the slag discharge trough 5 is provided with an inclined plate 51 at the slag outlet 22. A vibrating plate 52 is hinged below the inclined plate 51. A motor 53 is provided on the outer side of the slag discharge trough 5. A drive shaft 54 ​​is provided at the output end of the motor 53. The drive shaft 54 ​​extends into the inner side of the slag discharge trough 5 and is provided with multiple cams 55 that cooperate with the vibrating plate 52. A crossbeam 57 that cooperates with the vibrating plate 52 is provided on the inner side of the slag discharge trough 5. A three-stage filter screen 56 is provided on the vibrating plate 52. A liquid collection tank 58 is provided below the three-stage filter screen 56 in the slag discharge trough 5. The bottom of the liquid collection tank 58 is connected to the slurry outlet pipe 4 through a drain pipe 59.

[0055] To address the resource waste and environmental pollution caused by sludge residue in traditional slag discharge systems, the slag discharge platform 5 has undergone structural optimization at the slag outlet 22. Through the synergistic action of the inclined plate 51, the vibrating plate 52, and the three-stage filter screen 56, it achieves the dual functions of solid-liquid separation and sludge recovery. The inclined plate 51 on the inner side of the slag discharge platform 5 is arranged at an angle and connects to the slag outlet 22 to receive the particulate material pushed from the conveying channel 24. The vibrating plate 52, which is hinged below the inclined plate 51, achieves high-frequency vibration through a cam 55 mechanism driven by a motor 53. The motor 53 is fixed to the outside of the slag discharge platform 5, and its output drive shaft 54 ​​extends into the inner side of the platform. Multiple cams 55 on the shaft contact and cooperate with the bottom surface of the vibrating plate 52.

[0056] When motor 53 starts, drive shaft 54 ​​drives cam 55 to rotate. The protruding part of cam 55 periodically pushes up vibrating plate 52, causing it to swing up and down around the hinge point, forming high-frequency vibration. The three-stage filter screen 56 installed on vibrating plate 52 performs secondary filtration of slurry in particulate material. Crossbeam 57 is fixed inside the slag discharge tank 5, providing limiting support for vibrating plate 52 and ensuring the stability of vibration amplitude. After the material slides from inclined plate 51 to vibrating plate 52, under the action of high-frequency vibration, residual slurry quickly passes through the three-stage filter screen 56 and flows into the collection tank 58 below, while solid particles continue to move along vibrating plate 52 towards the slag discharge port and are finally discharged from the tank. The bottom of collection tank 58 is connected to slurry discharge pipe 4 through drainage pipe 59, so that the recovered slurry is re-integrated into the mainstream of filtered slurry, realizing resource recycling. This design not only reduces slurry waste but also reduces subsequent processing costs.

[0057] The high-frequency vibration of the vibrating plate 52 effectively prevents the clogging of the three-stage filter screen 56, ensuring solid-liquid separation efficiency. The vibration frequency can be adjusted by controlling the speed of the motor 53 to adapt to different mud characteristics, improving the adaptability and flexibility of the device. Since the cleaning mechanism 7 performs pulse water spray cleaning on the secondary filter screen 64 at the slag outlet 22, the cleaning water will be discharged from the slag discharge trough 5. The three-stage filter screen 56 mainly targets the cleaning water from the cleaning mechanism 7 and the residual liquid in the solid particles for recycling, thereby improving water resource utilization.

[0058] Combined with appendix Figure 3 and attached Figure 8 As shown, a primary filter screen 31 is provided inside the slurry inlet pipe 3, and a collection box 32 is provided at the bottom of the slurry inlet pipe 3. The collection box 32 is connected to the slurry inlet pipe 3 and the connection point is located in front of the primary filter screen 31.

[0059] To address the issue that large particles in the mud can easily clog the filter 6 and reduce filtration efficiency, the mud inlet pipe 3 adopts a design that combines a primary filter screen 31 with a collection box 32. This allows for preliminary screening of the mud before it enters the filter box, effectively intercepting large particles and reducing the pressure on subsequent filtration.

[0060] The primary filter screen 31, which is fixedly installed inside the slurry inlet pipe 3, serves as the first line of defense for the slurry entering the device. Its mesh size is larger than that of the secondary filter screen 64, which can efficiently intercept larger particles of sand, gravel, rock debris and other impurities. The collection box 32 is located at the bottom of the slurry inlet pipe 3, is connected to the slurry inlet pipe 3 and is connected to the front of the primary filter screen 31, forming an independent impurity collection space. This structural design ensures that the impurities intercepted by the primary filter screen 31 can slide directly into the collection box 32 by gravity, avoiding the accumulation of large particles on the screen surface and affecting the filtration speed.

[0061] During operation, the slurry flows in through the inlet pipe 3 and into the filter box 2 under the action of gravity and pump pressure. When passing through the primary filter screen 31, large particles of impurities are blocked in front of the screen, while finer particles of slurry continue to flow downward through the primary filter screen 31 and finally enter the filter box 2 through the inlet 21 for secondary filtration. The intercepted impurities slide down the primary filter screen 31 under the action of gravity and are stored in the collection box 32. As the slurry continues to be input, the collection box 32 can temporarily store a large amount of impurities. The staff can open the box regularly to clean it and prevent impurities from overflowing and affecting the filtration process. This pre-filtration design not only reduces the load on the filter 6 and extends the service life of the secondary filter screen 64, but also avoids large particles of impurities from scratching the filter screen, ensuring the stable and efficient operation of the entire filtration device.

[0062] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A drilling mud filtration device, comprising a support frame (1), a filter box (2), a mud inlet pipe (3), a mud outlet pipe (4), and a slag discharge trough (5) mounted on the support frame (1), wherein a filter (6) is provided inside the filter box (2), characterized in that: The filter (6) includes an upper ring platform (61) and a lower ring platform (62). The upper ring platform (61) and the lower ring platform (62) are rotatably disposed in the filter box (2). Multiple connecting plates (63) are connected between the upper ring platform (61) and the lower ring platform (62). A secondary filter screen (64) is provided between adjacent connecting plates (63). A slurry collection platform (67) is provided at the bottom of the lower ring platform (62) and is rotatably connected to the slurry outlet pipe (4). The filter box (2) is provided with a slurry inlet (21) and a slag outlet (22) at the front and rear ends, respectively, which are connected to the slurry inlet pipe (3) and the slag outlet platform (5). The bottom of the filter box (2) is connected to the slurry outlet pipe (4). The filter box (2) is provided with baffles (23) at the slurry inlet (21) and the slag outlet (22) on the inner side. The baffles (23) are in contact with the connecting plate (63). The two baffles (23) divide the gap between the filter (6) and the filter box (2) into a conveying channel (24). The conveying channel (24) is connected to the slurry inlet (21) and the slag outlet (22). A cleaning mechanism (7) is provided at the slag outlet (22). The cleaning mechanism (7) cleans the secondary filter screen (64) inside the filter (6) by high-frequency vibration and pulse high-pressure flushing. A pushing mechanism (8) is provided at the conveying channel (24). The pushing mechanism (8) pushes the granular material piled on the top of the conveying channel (24) in an oscillating manner. The cleaning mechanism (7) includes a fixed platform (71) and a hanging column (72). The fixed platform (71) is fixed to the mounting groove (27) on the top of the filter box (2). The hanging column (72) is located inside the filter (6) and its top is connected to the fixed platform (71). The fixed platform (71) is equipped with a second motor (73). The hanging column (72) is rotatably equipped with a transmission shaft (74) driven by the second motor (73). The transmission shaft (74) is equipped with an eccentric shaft (742). The hanging column (72) is movably equipped with a cleaning plate (75). The cleaning plate (75) and the eccentric shaft (742) are hinged together with a transmission rod (76). The column (72) is provided with a guide plate (721) facing the slag outlet (22). The cleaning plate (75) is radially slidably disposed inside the guide plate (721). Multiple impact heads (751) are elastically connected to the cleaning plate (75). Multiple high-pressure flushing heads (752) are provided on the cleaning plate (75). The top of the cleaning plate (75) is provided with a conveying pipe (753) communicating with the multiple high-pressure flushing heads (752). The conveying pipe (753) is connected to an external water supply device. The upper ring platform (61) is provided with a toothed ring (65) at the top, and the output end of the motor (73) is provided with a gear (731) that meshes with the toothed ring (65). A bevel gear (732) is coaxially connected to one side of the gear (731), and a bevel gear (741) that meshes with the bevel gear (732) is provided at the top of the transmission shaft (74).

2. A drilling mud filter apparatus as claimed in claim 1, characterised in that: The feeding mechanism (8) includes a motor (81), a swing arm (83), a fan-shaped platform (84), and a feeder (85). The motor (81) is fixed to the top of the filter box (2). The motor (81) drives the swing arm (83) to swing. One end of the swing arm (83) is provided with a connecting shaft (832) connected to the fan-shaped platform (84). The connecting shaft (832) is rotatably engaged with the through hole at the top of the filter box (2). The fan-shaped platform (84) is provided with multiple sliding holes (841). The feeder (85) is slidably disposed in the sliding holes (841). The bottom of the feeder (85) extends into the conveying channel (24).

3. A drilling mud filter apparatus as claimed in claim 2, wherein: The pusher (85) includes an upper slide rod (851) and a lower lever (853). The top of the lower lever (853) is provided with a slide table (854) that slides in cooperation with the inner groove of the upper slide rod (851). The slide table (854) is provided with a spring (855) connected to the upper slide rod (851). The top of the upper slide rod (851) is provided with a positioning rod (852). The top of the filter box (2) is provided with an arc-shaped platform (25). The arc-shaped platform (25) is provided with multiple obliquely arranged guide grooves (26). The positioning rod (852) slides in cooperation with the guide grooves (26).

4. A drilling mud filter apparatus as claimed in claim 2, wherein: The output end of the motor (81) is provided with a turntable (82), and a drive rod (821) is provided at the eccentric part of the turntable (82). The swing arm (83) is provided with a straight groove (831) that slides with the drive rod (821).

5. A drilling mud filtration device according to claim 1, characterized in that: The slag discharge platform (5) has an inclined plate (51) at the slag outlet (22) on the inner side. A vibrating plate (52) is hinged below the inclined plate (51). A motor (53) is provided on the outer side of the slag discharge platform (5). A drive shaft (54) is provided at the output end of the motor (53). The drive shaft (54) extends into the inner side of the slag discharge platform (5) and is provided with multiple cams (55) that cooperate with the vibrating plate (52). A crossbeam (57) that cooperates with the vibrating plate (52) is provided on the inner side of the slag discharge platform (5). A three-stage filter screen (56) is provided on the vibrating plate (52). A liquid collection tank (58) is provided below the three-stage filter screen (56) of the slag discharge platform (5). The bottom of the liquid collection tank (58) is connected to the slurry outlet pipe (4) through the liquid discharge pipe (59).

6. A drilling mud filtration device according to claim 1, characterized in that: The inner side of the slurry inlet pipe (3) is provided with a primary filter screen (31), and the bottom of the slurry inlet pipe (3) is provided with a collection box (32). The collection box (32) is connected to the slurry inlet pipe (3) and the connection point is located in front of the primary filter screen (31).

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