Slurry filtering device for slurry shield construction

Abstract

The invention provides a slurry filtering device for slurry shield construction. The filtering device comprises a base and a filtering box, the filtering box is installed on the base through a vibration spring, a vibration motor is installed at the bottom end of the filtering box, a first filtering net is movably installed on the inner wall of the filtering box, and the filtering box is divided into a feeding cavity and a discharging cavity through the first filtering net; filter screen storage cavities are formed in box plates on the two sides of the filter box respectively, a second filter screen is installed in one filter screen storage cavity in a sliding mode, a feeding opening is formed in the top end of the filter box, a residue discharging opening is formed in the feeding cavity, a sludge discharging opening is formed in the discharging cavity, and an overturning assembly and a driving mechanism are arranged on one side of the first filter screen; according to the muddy water filtering device, by arranging the driving mechanism and the overturning assembly, when many viscous substances are attached to the surface of the first filter screen, the first filter screen and the second filter screen move at the same time, the filter screens are replaced, the influence of the viscous substances in mud on the filtering effect of the first filter screen is reduced, and the working efficiency of the muddy water filtering device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of muddy water circulation treatment devices, in particular to a mud filtering device used for muddy water shield construction. Background Art

[0002] The mud and water circulation treatment device in the construction of slurry shield is a key system to ensure the normal excavation of the shield machine and the stability of the soil. The main function of this device is to treat and recycle mud and water, including separation and purification of mud and water, and adjustment of the physical and chemical properties of mud and water so that it can be re-transported to the mud and water bin of the shield machine. It is usually equipped with a mud pump to transport the mud and water from the mud shield to the mud and water circulation treatment device, and then the cyclone separator is used for preliminary mud and water separation, and then the vibrating screen is used to remove the larger particles in the mud, and then the mud is separated into clean water and mud cake through the dehydration equipment, and finally the clean water and the prepared mud are transported back to the slurry shield machine to complete the mud and water circulation in the slurry shield construction.

[0003] In actual use, the mud is generally filtered through a vibrating screen. Although the vibrating screen can effectively remove larger particles in the mud, when it is used for a long time or when treating relatively viscous mud, a large amount of viscous substances are easily attached to the surface of the filter in the vibrating screen, thereby reducing the mud filtering effect and the vibration amplitude of the filter, thereby reducing the separation efficiency of the vibrating screen, causing the working efficiency of the mud filtering device to decrease. At this time, the staff needs to close and disassemble the vibrating screen to replace the filter, which causes cumbersome operation and affects the overall working efficiency of the mud and water circulation treatment device. Therefore, in view of the above problems, a mud filtering device for mud and water shield construction is proposed. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the present invention provides a mud filtering device for mud shield construction. When the filtering device is used for a long time or processes relatively viscous mud, when a large amount of viscous material is easily attached to the surface of the filter screen in the vibrating screen, the filter screen can be automatically replaced, saving the filter screen replacement time and process, thereby improving the mud processing efficiency.

[0005] In order to achieve the above technical purpose, the present invention provides a mud filtering device for mud-water shield construction, comprising a base and a filter box, wherein the filter box is installed on the base through multiple groups of vibration springs, and a vibration motor is fixedly installed at the bottom end of the filter box, and vibration power is provided to the filter box through the vibration motor, characterized in that: a first filter screen is movably installed in the filter box, and the inner cavity of the filter box is divided into an upper feed cavity and a lower discharge cavity by the first filter screen, a feed port connected to the feed cavity is provided at the top of the filter box, a slag discharge port is provided at a position of the filter box corresponding to the bottom of the feed cavity, and a mud discharge port is provided at a position of the filter box corresponding to the bottom of the discharge cavity; the first filter screen is installed in the filter box through a flip assembly, and filter screen storage cavities are respectively provided in the box baffles on the left and right sides of the filter box corresponding to the first filter screen, and the positions of the two filter screen storage cavities corresponding to the first filter screen are respectively provided with cavity openings matching the first filter screen, and a second filter screen is slidably installed in the filter screen storage cavity of the box baffle on one side, and one side edge of the second filter screen is adjacent to one side edge of the first filter screen; The flip assembly includes a driving mechanism and first sliding rods symmetrically arranged on both sides of the first filter screen, and the first sliding rods are arranged on the side of the first filter screen that is not adjacent to the filter screen storage chamber; first sliding grooves are respectively opened on the inner walls of the box baffles on both sides of the filter box corresponding to the first filter screen provided with the first sliding rod, and the two ends of each group of first sliding grooves extend to the filter screen storage chambers on both sides, and two groups of second sliding grooves are respectively arranged in the filter screen storage chambers on both sides, and the two groups of second sliding grooves in the filter screen storage chamber on each side are respectively connected with the two groups of first sliding grooves; the first filter screen is slidably installed in the first sliding groove by the first sliding rods on both sides, and the two sides of the second filter screen are slidably installed in the second sliding grooves by the second sliding rods; The driving mechanism is installed at the end of one of the first sliding rods and is connected to the first sliding rod through a transmission assembly. The driving mechanism is connected to one of the second sliding rods of the second filter screen through a synchronous transmission mechanism. The first sliding rod and the second sliding rod are synchronously driven by the driving mechanism to slide along the first sliding groove and the second sliding groove, so that the first sliding rod drives the first filter screen to move into the filter storage cavity of the filter box away from the second filter screen side, and at the same time drives the second filter screen to move to the original position of the first filter screen for filter replacement.

[0006] A further technical solution of the present invention: the driving mechanism is installed in the box baffle of the filter box, and a driving mechanism installation cavity is provided in the box baffle where the driving mechanism is installed; the driving mechanism includes a first driving motor, a screw rod and a slider threaded on the screw rod, the screw rod is vertically arranged at one end of the first filter away from the second filter screen, and is rotatably installed in the driving mechanism installation cavity, the lower end of the screw rod extends vertically to below the bottom of the filter storage cavity on the same side, the first driving motor is fixedly installed in the driving mechanism installation cavity, and its output shaft is fixedly connected to the screw rod, and the slider is connected to one of the first sliding rods of the first filter screen; the screw rod is controlled to rotate by the first driving motor, driving the slider to move up and down along the screw rod, thereby driving the first filter screen to slide along the first slide groove to the filter storage cavity where the second filter screen is not installed.

[0007] The preferred technical solution of the present invention is as follows: the mud filtering device also includes a fixing component, which includes a second driving motor fixed in the driving mechanism mounting cavity, a first gear fixedly mounted on the output shaft of the second driving motor, a first rotating rod arranged at the bottom end of the first gear and a driving toothed plate located at the bottom of the filter box, the lower end of the first rotating rod extends out of the bottom of the filter box, and the second gear is fixedly mounted on its bottom end, a limiting frame is sleeved on the outer side of the second gear, the driving toothed plate is arranged on the inner frame wall of the limiting frame and meshes with the second gear, and an inclined block is fixedly mounted at one end of the limiting frame; a guide rod is provided in each group of vibration springs, the guide rod is fixed on the base, the vibration spring is wound around the outside of the guide rod, the lower end is fixed on the base, and the upper end is fixed on the bottom of the filter box, and an inclined groove matching the inclined block is provided at the top end of the guide rod inside the vibration spring adjacent to the inclined block; and under the action of the second driving motor, the limit frame is driven to move until the inclined block is engaged with the inclined groove.

[0008] The preferred technical solution of the present invention is as follows: the first filter screen and the bottom of the discharge chamber are both inclined, and the inclination angle is not greater than 15°, the first filter screen is inclined toward the slag discharge port, and the bottom of the discharge chamber is inclined toward the mud discharge port; a flow meter is installed on the outer pipe of the mud discharge port.

[0009] The preferred technical solution of the present invention is as follows: drying plates are slidably installed in the filter storage cavities on both sides of the filter box, ventilation holes are arranged on one side of the drying plate, and a scraper is arranged on the top of the drying plate.

[0010] The preferred technical solution of the present invention is as follows: the synchronous transmission mechanism includes a synchronous rod arranged on one side of the slider, and a synchronous block is rotatably installed on the end of the synchronous rod away from the slider; two second sliding rods are provided on each side of the second filter screen, and the two second sliding rods on the same side are respectively arranged at the upper and lower ends of the second filter screen; the synchronous block is fixedly installed on the second sliding rod on the same side of the driving mechanism as the upper end of the second filter screen; and when the slider moves up and down along the screw rod, the second sliding rod is driven to slide along the second sliding groove and the first sliding groove through the synchronous rod.

[0011] A more preferred technical solution of the present invention is as follows: two first sliding bars are provided on each side of the first filter screen, and the two first sliding bars on the same side are respectively arranged at two ends of the first filter screen storage chambers adjacent to the two filter screens.

[0012] The preferred technical solution of the present invention is as follows: the filtering device further comprises a blocking assembly, the blocking assembly comprising a second rotating rod and a blocking plate located in the feed chamber, the second rotating rod is rotatably mounted in the drive mechanism mounting chamber, and vertically extends to the height of the feed chamber, and is connected to the blocking plate through a rotating handle, a third gear is fixedly mounted at a position where the second rotating rod is at the same height as the first gear, and the third gear is meshed with the first gear A better technical solution of the present invention: the cross-sectional area of ​​the baffle plate is larger than the cross-sectional area of ​​the feed port, a baffle groove is provided on one side of the bottom end of the feed port, the baffle groove is opened on the inner wall of the filter box, and the baffle plate is slidably installed in the baffle groove.

[0013] The present invention is beneficial in that: (1) The present invention provides a driving mechanism and a flip assembly. When a large amount of viscous substances are attached to the surface of the first filter screen, the staff can start the driving mechanism to drive the flip assembly to operate, so that the first filter screen flips to one side of the filter box and drives the second filter screen to flip to the position of the first filter screen, thereby realizing the filter screen replacement process; the filter screen replacement process of the present invention is simple and convenient, and the filter screen can be replaced without disassembling the filter device, which reduces the filter screen replacement time, simplifies the filter screen replacement procedure, reduces the influence of the viscous substances in the mud on the filtering effect of the filter screen, and improves the overall working efficiency of the filter device; (2) The present invention provides a fixing component. Before replacing the first filter, the staff can start the first drive motor, so that the first drive motor drives the tilting block to move to abut against the tilting groove through the first gear, the first rotating rod and the driving tooth plate, thereby fixing the filter box. This avoids the need to wait for the closed filter box to stop vibrating before replacing the first filter, which results in a prolonged stop time of the mud and water circulation treatment device as a whole, thereby reducing the overall working efficiency of the mud and water circulation treatment device, shortening the time for replacing the first filter, and improving the overall working efficiency of the mud and water circulation treatment device. In addition, by fixing the filter box, the replacement process of the first filter can also be made more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the flip assembly of the present invention; Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 The enlarged view of point B in the middle; Figure 5 It is a schematic diagram of the cross-sectional structure of the barrier component of the present invention.

[0016] In the figure: 1. base; 2. vibration spring; 3. filter box; 4. feed port; 5. slag discharge port; 6. mud discharge port; 7. first filter screen; 8. first drive rod; 9. first slide slot; 10. slider; 11. screw rod; 12. first drive motor; 13. first gear; 14. second drive motor; 15. synchronization rod; 16. synchronization block; 17. second drive rod; 18. second filter screen; 19. first rotating rod; 20. driving tooth plate; 21. tilting block; 22. guide rod; 23. tilting groove; 24. limit frame; 25. buffer spring; 26. second gear; 27. third gear; 28. second rotating rod; 29. ​​rotating handle; 30. baffle plate; 31. baffle slot; 32. drying plate; 33. scraper; 34. second slide slot; 35. flow meter. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1 provides a mud filtering device for mud shield construction, such as Figures 1 to 5As shown, it includes a base 1 and a filter box 3, the top of the base 1 is evenly installed with a vibration spring 2, the filter box 3 is located at the top of the vibration spring 2, and a vibration motor is fixedly installed at the bottom of the filter box 3. The vibration motor is located between the base 1 and the filter box 3 and is used to provide vibration power for the filter box 3. A feed port 4 is fixedly installed at the top of the filter box 3, a slag discharge port 5 is fixedly installed on one side of the filter box 3, and a mud outlet 6 is provided at the bottom of the other side of the filter box 3, and a flow meter 36 is installed on the outer wall of the mud outlet 6. A first filter screen 7 is movably installed in the body of the filter box 3, and the first filter screen 7 divides the inner cavity of the filter box 3 into an upper feed cavity and a lower discharge cavity. The feed port 4 is arranged at the top of the feed cavity, the slag discharge port 5 is arranged on the lower side of the feed cavity, and the mud discharge port 6 is arranged at the bottom of one side of the discharge cavity. The first filter screen 7 and the bottom of the discharge cavity are both inclined, and the inclination angle is not greater than 15°. The first filter screen 7 is inclined toward the slag discharge port 5, and the bottom of the discharge cavity is inclined toward the mud discharge port 6, which can ensure that the filtered large-particle mud can be discharged smoothly through the slag discharge port during the vibration process, and the filtered mud can be discharged smoothly through the mud discharge port 6.

[0019] A slurry filtering device for slurry shield construction is provided in the first embodiment. Figures 1 to 5 As shown, the first filter screen 7 is installed in the filter box 3 through a flip assembly, and filter screen storage cavities are respectively provided in the box baffles on the left and right sides of the filter box 3 corresponding to the first filter screen 7, and the positions of the two filter screen storage cavities corresponding to the first filter screen 7 are respectively provided with cavity openings matching the first filter screen 7, and a second filter screen 18 is slidably installed in the filter screen storage cavity of the box baffle on one side, and one side edge of the second filter screen 18 is adjacent to one side edge of the first filter screen 7. The flip assembly includes a driving mechanism and first sliding rods 8 symmetrically arranged on the front and rear sides of the first filter screen 7 which is not adjacent to the filter screen storage cavity, and two first sliding rods 8 are arranged on each side, and the two first sliding rods 8 on the same side are respectively arranged at the left and right ends of the two filter screen storage cavities adjacent to the first filter screen 7; first sliding grooves 9 are respectively opened on the inner walls of the box baffles on the front and rear sides of the filter box 3 corresponding to the first filter screen 7 provided with the first sliding rod 8, and the two ends of the two groups of first sliding grooves 9 extend to the filter screen storage cavities on the left and right sides respectively, and two groups of second sliding grooves 34 are respectively arranged in the filter screen storage cavities on both sides, and the two groups of second sliding grooves 34 in the filter screen storage cavity on each side are respectively connected with the two groups of first sliding grooves 9 to form two "" The first filter screen 7 is slidably installed in the first slide groove 9 through the first slide bars 8 on both sides. The driving mechanism is installed at the end of one of the first slide bars 8 and can drive the first slide bar 8 to slide along the first slide groove 9 and the second slide groove 34, so that the first slide bar 8 can drive the first filter screen 7 to move stably and smoothly to the filter storage cavity of the filter box 3 away from the second filter screen 18. The second filter screen 18 is connected to the driving mechanism through a synchronous transmission mechanism, and when the driving mechanism drives the first filter screen 7 to move toward the filter storage cavity away from the second filter screen 18, it also drives the second filter screen 18 to move to the original position of the first filter screen 7, thereby realizing the filter replacement process.

[0020] The driving mechanism in the first embodiment is installed in the box baffle of the filter box 3. The box baffle thickness of the filter box 3 meets the installation of the driving mechanism and the setting of the filter storage cavity. In order to facilitate the installation of the driving mechanism, a driving mechanism installation cavity can be provided in the box baffle where the driving mechanism is installed, such as Figures 2 to 4 As shown, it includes a first drive motor 12, a screw rod 11 and a slider 10 threadedly sleeved on the screw rod, the screw rod 11 is vertically arranged at the end of the first filter screen 7 away from the second filter screen 18, and is rotatably installed in the drive mechanism installation cavity, the slider 10 starts at the upper end of the screw rod 11, and is connected to the first slide rod 8 on the same side of the first filter screen 7, and the lower end of the screw rod 11 extends vertically to below the bottom of the filter storage cavity on the same side; the first drive motor 12 is fixedly installed in the drive mechanism installation cavity, and the output shaft of the first drive motor 12 is connected to the screw rod 11 The lower end is fixedly connected, the input end of the first drive motor 12 is electrically connected to the external power supply, and the driving mechanism is set so that when the staff needs to replace the first filter 7, they can start the first drive motor 12, and the first drive motor 12 controls the screw rod 11 to rotate, and the slider 10 is used to move downward along the screw rod 11, thereby driving one end of the first filter 7 to slide along the first slide groove 9 to the filter storage chamber where the second filter 18 is not installed, thereby reducing the filter replacement operation steps and improving work efficiency. The model of the first drive motor 12 is HG KN73BJ S100.

[0021] In the first embodiment, the synchronous transmission mechanism is as follows: Figure 2 , Figure 3 and Figure 5As shown, it includes a synchronization rod 15 arranged on one side of the slider 10, and a synchronization block 16 is rotatably installed at one end of the synchronization rod 15 away from the slider 10. Second slide bars 17 are symmetrically arranged on the front and rear sides of the second filter screen 18, and the second filter screen 18 is slidably installed in the second slide groove 34 of the corresponding filter screen storage chamber through the second slide bars 17 on the front and rear sides. Two second slide bars 17 are arranged on each side, and the two second slide bars 17 on the same side are respectively arranged at the upper end of the second filter screen 18 adjacent to the first filter screen 7 and the lower end away from the first filter screen 7; the synchronization block 16 is fixedly installed on the second slide bar 17 at the upper end of the second filter screen 18 adjacent to the first filter screen 7. When the slider 10 moves up and down along the screw rod 11, the synchronization block 16 and the second slide bar 17 connected to the synchronization block 16 are driven by the synchronization rod 15 to move along the second slide groove 34 and the first slide groove 9; and when the slider 10 moves downward along the screw rod 11, the synchronization block 16 drives the second slide bar 17 and the second filter screen 18 to move to the original position of the first filter screen 7, thereby replacing the first filter screen 7 to perform filtering work.

[0022] To sum up, through the cooperation of the flipping assembly and the synchronous transmission mechanism, when the first filter screen 7 is attached with a large amount of viscous material, the staff can start the first drive motor 12, so that the first drive motor 12 drives the flipping assembly through the first gear 13 and the first gear 12, thereby moving the first filter screen 7 to one side of the filter box 3, and at the same time moving the second filter screen 18 to the original position of the first filter screen 7, that is, the bottom end of the feed port 4, through the synchronous transmission mechanism, so that the staff can replace the first filter screen 7 and the second filter screen 18 without disassembling the filter box 3, which simplifies the replacement steps of the first filter screen 7 and improves the working efficiency of the mud and water filtering device.

[0023] The second embodiment provides a slurry filtering device for slurry shield construction, which, in addition to the structure in the first embodiment, also includes a fixing component; Figure 2 , Figure 4 and Figure 5As shown, each group of vibration springs 2 is provided with a guide rod 22, the guide rod 22 is fixed on the base 1, the vibration spring 2 is wound around the guide rod 22, the lower end is fixed on the base 1, and the upper end is fixed on the bottom of the filter box 3. By setting the guide rod 22, the filter box 3 can be guided left and right when the filter box 3 vibrates with a small amplitude and for a long time, so that the filter box 3 can reciprocate in the vertical direction, avoiding the filter box 3 from vibrating in the horizontal direction, causing the vibration spring 2 to bend and damaged. The fixing assembly includes a second driving motor 14 fixed in the driving mechanism installation cavity, a first gear 13 fixedly installed on the output shaft of the second driving motor 14, a first rotating rod 19 arranged at the bottom end of the first gear 13 and a driving toothed plate 20 located at the bottom of the filter box 3, the lower end of the first rotating rod 19 extends out of the bottom of the filter box 3, and a second gear 26 is fixedly installed at its bottom end, the second gear 26 and the driving toothed plate 20, in order to limit the second gear 26 from separating from the driving toothed plate 20, a limiting frame 24 is provided on the outer side of the second gear 26, and the driving toothed plate 20 is arranged on the inner frame of the limiting frame 24, A tilting block 21 is fixedly mounted on the end of the frame body of the limiting frame 24 , and a tilting groove 23 matching the tilting block 21 is provided at the top end of the guide rod 22 inside the vibration spring adjacent to the tilting block 21 .

[0024] When the filter is replaced, when the horizontal height of the guide rod 22 is low, at this time, when the second drive motor 14 is working, it drives the first rotating rod 19 to rotate, thereby driving the inclined block 21 end of the driving tooth plate 20 to move toward the inclined groove 23, so that the inclined block 21 at the end of the driving tooth plate 20 abuts against the inner wall of the inclined groove 23, and when the bottom end of the inclined block 21 abuts against the bottom end of the inclined groove 23, the guide rod 22 is fixed, thereby fixing the position between the base 1 and the filter box 3, so that the filter box 3 stops vibrating quickly, avoiding the vibration of the filter box 3 affecting the replacement of the filter, thereby improving the filter replacement efficiency. In order to ensure stable fixation, another set of fixing components can be set at the diagonal position of the filter box 3, and a second drive motor can be added at the diagonal position at the same time. The first rotating rod of the fixing component is powered by the added second drive motor to control its rotation.

[0025] See also Figure 2-4 and Figure 5As shown, the mud filtering device used for mud-water shield construction in the second embodiment also includes a blocking component, which includes a second rotating rod 28 and a blocking plate 30 located in the feed chamber, the second rotating rod 28 is rotatably installed in the driving mechanism installation chamber, and vertically extends to the height of the feed chamber, and is connected to the blocking plate 30 through a rotating handle 29, and a third gear 27 is fixedly installed at a position at which the second rotating rod 28 is at the same height as the first gear 13, and the third gear 27 is meshed with the first gear 13. By setting the third gear 27, when the second driving motor 14 is working, the second rotating rod 28 can be driven to rotate at the same time; and the setting position of the second rotating rod 28 avoids the position of the synchronous rod 15 to avoid the second rotating rod 28 from abutting against one side of the synchronous rod 15 to hinder the movement of the synchronous rod 15, and a rotating handle 29 is fixedly installed on the top of the second rotating rod 28, and the rotating handle 29 passes through the filter box 3 and extends to the inside of the filter box 3 to be connected to the blocking plate 30. The baffle plate 30 is located below the feed port 4, and during the filter replacement process, the baffle plate 30 is controlled by the second drive motor 14 to rotate to just below the feed port 4 to block the feed port, thereby preventing the mud from continuously entering the filter box 3 through the feed port 4 when the first filter screen 7 is replaced, thereby preventing the replacement of the first filter screen 7 from being hindered; in addition, the unfiltered mud directly flows out from the mud outlet 6, which will also cause the mud-water separation effect of the mud-water circulation treatment device to decrease.

[0026] See also Figure 5 As shown, the cross-sectional area of ​​the baffle plate 30 in the second embodiment is larger than the cross-sectional area of ​​the feed port 4, and a baffle groove 31 is provided on one side of the bottom end of the feed port 4, and the baffle groove 31 is opened on the inner wall of the filter box 3, and the baffle plate 30 is slidably installed on the inner wall of the baffle groove 31, so that the baffle plate 30 can completely cover the bottom end of the feed port 4, thereby improving the blocking effect of the blocking component on the mud, and avoiding the problem that when one end of the baffle plate 30 reaches one side of the bottom end of the feed port 4, the mud easily falls into the filter box 3 from the gap between one end of the baffle plate 30 and the bottom end of the feed port 4, thereby reducing the blocking effect of the blocking component.

[0027] See also Figure 1-2 and Figure 5As shown, drying plates 32 are slidably installed in the filter storage chambers on both sides of the filter box 3 in the first embodiment and the second embodiment, and ventilation holes are set on one side of the drying plate 32. When the first filter 7 moves to one side of the drying plate 32, the ventilation holes can be used to enhance air circulation, thereby accelerating the drying of the viscous material on the surface of the first filter 7, so that the impurities on the surface of the first filter 7 can be separated more easily. A scraper 33 is set at the top of the drying plate 32, and the side of the scraper 33 close to the filter box 3 is set as a curved part, and the side of the scraper 33 away from the filter box 3 is set as a straight part, so that when the filter under the mud port moves to the filter storage chambers on both sides, the scraper 33 can scrape the surface of the filter, further separate the debris on the surface of the filter, and clean the replaced filter, so that it can be reused again to increase the filtering effect. Mud discharge ports are provided at the bottom of the filter storage chambers on both sides, so that the mud dropped in the filter storage chambers can be discharged; the bottoms of the filter storage chambers on both sides can also be opened to clean and discharge the dropped mud residue; or the filter in the filter storage chamber can be taken out and cleaned for reuse.

[0028] The working process of the present invention is as follows: a large amount of viscous substances adhere to the surface of the first filter screen 7, resulting in a decrease in the filtering and separation efficiency of the mud and water filtering device. The staff observes the flow meter and turns off the vibration motor. When the vibration amplitude of the filter box 3 is difficult to observe, the staff starts the second drive motor 14, and the second drive motor 14 drives the first gear 13 to rotate, the first gear 13 drives the third gear 27 to rotate, the third gear 27 drives the second rotating rod 28 to rotate, the second rotating rod 28 drives the rotating handle 29 to rotate, and the rotating handle 29 drives the blocking plate 30 to move to the inner wall of the blocking groove 31 to prevent the mud from continuing to enter the filter box 3; at the same time, the first gear 13 drives the first rotating rod 19 to rotate, the first rotating rod 19 drives the driving tooth plate 20 to move, and the driving tooth plate 20 drives the tilting block 21 to move toward the device The guide rod 22 with the inclined groove 23 moves in the direction of the guide rod 22, so that the inclined block 21 drives the inclined groove 23 to move in the direction close to the filter box 3, until the inclined block 21 moves to completely abut against the inclined groove 23, and the buffer tooth plate 24 squeezes the buffer spring 25, so that the buffer spring 25 undergoes elastic deformation and accumulates elastic potential energy. When the tooth block at the bottom end of the first rotating rod 19 stops abutting against the buffer tooth plate 24, the buffer spring 25 releases the elastic potential energy and undergoes elastic deformation to drive the buffer tooth plate 24 to move away from the driving tooth plate 20, so that the buffer tooth plate 24 engages with the first rotating rod 19 again, so that the buffer tooth plate 24 is always engaged with the first rotating rod 19; the position between the filter box 3 and the base 1 is fixed, thereby quickly stopping the vibration of the filter box 3.

[0029] After the vibrating screen stops feeding and vibrating, the second drive power supply machine 14 is controlled to be turned off, and the first drive motor 12 is controlled to work. The first drive motor 12 drives the screw rod 11 to rotate, so that the screw rod 11 drives the slider 10 to move in the direction close to the base 1, and the slider 10 drives the first slide bar 8 to move, and the first slide bar 8 drives the first filter screen 7 to move along the first slide groove 9, so that the first filter screen 7 leaves the bottom end of the feed port 4 and enters the filter storage chamber on one side. At the same time, the slider 10 drives the synchronization rod 15 to move, and the synchronization rod 15 drives the synchronization block 16 to move, and the synchronization block 16 drives the second slide rod 17 to move, so that the second slide rod 17 moves along the first slide groove 9, thereby driving the second filter screen 18 to flip to the bottom end of the feed port 4, that is, the original position of the first filter screen 7, and the replacement of the first filter screen 7 is completed.

[0030] When the first filter screen 7 is flipped to one side of the drying plate 32, the drying of the surface viscous material is accelerated through the ventilation holes opened in the drying plate 32, and the dried attachments are shaken off by the vibration of the filter box 3; when a large amount of viscous material is attached to the surface of the second filter screen 18, the staff starts the first drive motor 12 in reverse, so that the first drive motor 12 drives the first filter screen 7 to flip to the bottom end of the feed inlet 4 through the screw rod 11, and drives the second filter screen 18 to flip to one side of the drying plate 32 through the synchronization rod 15, the synchronization block 16 and the second slide rod 17, completing the replacement of the second filter screen 18, and while the first filter screen 7 is flipped, the scraper 33 is provided to scrape off the debris on the surface of the first filter screen 7, further improving the filtering efficiency of the first filter screen 7, and continuously repeating the above steps, repeatedly replacing the first filter screen 7 and the second filter screen 18, thereby improving the filtering efficiency of the mud and water filtering device.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A slurry filtering device for slurry shield construction, comprising a base (1) and a filter box (3), wherein the filter box (3) is mounted on the base (1) via a plurality of sets of vibration springs (2), a vibration motor is fixedly mounted at the bottom end of the filter box (3), and the vibration motor provides vibration power for the filter box, wherein: A first filter screen (7) is movably installed in the filter box (3), and the inner cavity of the filter box (3) is divided into an upper feed cavity and a lower discharge cavity by the first filter screen (7). A feed port (4) communicating with the feed cavity is provided at the top of the filter box (3), a slag discharge port (5) is provided at a position of the filter box (3) corresponding to the bottom of the feed cavity, and a mud discharge port (6) is provided at a position of the filter box (3) corresponding to the bottom of the discharge cavity; the first filter screen (7) is installed in the filter box (3) through a flip assembly, and filter screen storage cavities are respectively provided in the box baffles on the left and right sides of the filter box (3) corresponding to the first filter screen (7), and the two filter screen storage cavities are respectively provided with cavity openings matching the first filter screen (7) at positions corresponding to the first filter screen (7), and a second filter screen (18) is slidably installed in the filter screen storage cavity of the box baffle on one side, and one side edge of the second filter screen (18) is adjacent to one side edge of the first filter screen (7); The flip assembly comprises a driving mechanism and first slide bars (8) symmetrically arranged on both sides of the first filter (7), and the first slide bars (8) are arranged on the side of the first filter (7) that is not adjacent to the filter storage chamber; first slide grooves (9) are respectively opened on the inner walls of the baffle plates on both sides of the filter box (3) corresponding to the first filter (7) provided with the first slide bars (8), and the two ends of each group of first slide grooves (9) extend to the filter storage chambers on both sides respectively, and two groups of second slide grooves (34) are respectively arranged in the filter storage chambers on both sides, and the two groups of second slide grooves (34) in the filter storage chambers on each side are respectively connected to the two groups of first slide grooves (9); the first filter (7) is slidably installed in the first slide grooves (9) through the first slide bars (8) on both sides, and the two sides of the second filter (18) are slidably installed in the second slide grooves (34) through the second slide bars (17); The driving mechanism is installed at the end of one of the first slide bars (8) and is connected to the first slide bar (8) through a transmission assembly. The driving mechanism is transmission-connected to one of the second slide bars (17) of the second filter screen (18) through a synchronous transmission mechanism. The first slide bar (8) and the second slide bar (17) are synchronously driven by the driving mechanism to slide along the first slide groove (9) and the second slide groove (34), so that the first slide bar (8) drives the first filter screen (7) to move to the filter storage chamber of the filter box (3) away from the second filter screen (18), and at the same time drives the second filter screen (18) to move to the original position of the first filter screen (7) to replace the filter screen.

2. A mud filtering device for mud shield construction according to claim 1, characterized in that: The drive mechanism is installed in a box baffle of the filter box (3), and a drive mechanism installation cavity is provided in the box baffle where the drive mechanism is installed; the drive mechanism comprises a first drive motor (12), a screw rod (11) and a slider (10) threadedly sleeved on the screw rod; the screw rod (11) is vertically arranged at one end of the first filter screen (7) away from the second filter screen (18), and is rotatably installed in the drive mechanism installation cavity; the lower end of the screw rod (11) vertically extends below the cavity bottom of the filter screen storage cavity on the same side; the first drive motor (12) is fixedly installed in the drive mechanism installation cavity, and its output shaft is fixedly connected to the screw rod (11); the slider (10) is connected to one of the first slide rods (8) of the first filter screen (7); the screw rod (11) is controlled to rotate by the first drive motor (12), so as to drive the slider (10) to move up and down along the screw rod (11), thereby driving the first filter screen (7) to slide along the first slide groove (9) to the filter screen storage cavity where the second filter screen (18) is not installed.

3. A mud filtering device for mud shield construction according to claim 1 or 2, characterized in that: The mud filtering device further comprises a fixing assembly, the fixing assembly comprising a second driving motor (14) fixed in the driving mechanism mounting cavity, a first gear (13) fixedly mounted on the output shaft of the second driving motor (14), a first rotating rod (19) arranged at the bottom end of the first gear (13) and a driving tooth plate (20) located at the bottom of the filter box (3), the lower end of the first rotating rod (19) extending out of the bottom of the filter box (3) and a second gear (26) fixedly mounted at the bottom end thereof, a limiting frame (24) being sleeved on the outer side of the second gear (26), the driving tooth plate (20) being arranged on the inner frame wall of the limiting frame (24) and being connected to the first rotating rod (19) and the second gear (26) being fixedly mounted on the bottom end thereof. The two gears (26) are meshed, and a tilting block (21) is fixedly mounted at one end of the limit frame (24); a guide rod (22) is provided inside each set of vibration springs (2), the guide rod (22) is fixed on the base (1), the vibration spring (2) is wound around the outside of the guide rod (22), the lower end is fixed on the base (1), and the upper end is fixed on the bottom of the filter box (3); an inclined groove (23) matching the inclined block (21) is provided at the top end of the guide rod (22) inside the vibration spring adjacent to the tilting block (21); and under the action of the second drive motor (14), the limit frame (24) is driven to move to the tilting block (21) to engage with the inclined groove (23).

4. A mud filtering device for mud shield construction according to claim 1 or 2, characterized in that: The first filter screen (7) and the bottom of the discharge chamber are both inclined, and the inclination angle is not greater than 15°; the first filter screen (7) is inclined toward the slag discharge port (5), and the bottom of the discharge chamber is inclined toward the mud discharge port (6); a flow meter (35) is installed on the outer pipe of the mud discharge port (6).

5. A mud filtering device for mud-water shield construction according to claim 1 or 2, characterized in that: Drying plates (32) are slidably mounted in the filter screen storage cavities on both sides of the filter box (3), a ventilation hole is provided on one side of the drying plate (32), and a scraper (33) is provided on the top of the drying plate (32).

6. A slurry filtering device for slurry shield construction according to claim 2, characterized in that: The synchronous transmission mechanism comprises a synchronous rod (15) arranged on one side of the slider (10), and a synchronous block (16) is rotatably mounted on one end of the synchronous rod (15) away from the slider (10); two second slide rods (17) are arranged on each side of the second filter screen (18), and the two second slide rods (17) on the same side are respectively arranged at the upper and lower ends of the second filter screen (18); the synchronous block (16) is fixedly mounted on the second slide rod (17) on the same side of the driving mechanism at the upper end of the second filter screen (18); and when the slider (10) moves up and down along the screw rod (11), the second slide rod (17) is driven by the synchronous rod (15) to slide along the second slide groove (34) and the first slide groove (9).

7. A slurry filtering device for slurry shield construction according to claim 2, characterized in that: Two first sliding bars (8) are provided on each side of the first filter screen (7), and the two first sliding bars (8) on the same side are respectively arranged at two ends of the first filter screen (7) adjacent to the two filter screen storage cavities.

8. The slurry filtering device for slurry shield construction according to claim 3, characterized in that: The filtering device further comprises a blocking assembly, which comprises a second rotating rod (28) and a blocking plate (30) located in the feed chamber. The second rotating rod (28) is rotatably mounted in the drive mechanism mounting chamber and vertically extends to the height of the feed chamber and is connected to the blocking plate (30) via a rotating handle (29). A third gear (27) is fixedly mounted at a position at the same height as the second rotating rod (28) and the first gear (13), and the third gear (27) and the first gear (13) are meshed with each other.

9. A mud filtering device for mud-water shield construction according to claim 8, characterized in that: The cross-sectional area of ​​the baffle plate (30) is greater than the cross-sectional area of ​​the feed port (4), and a baffle groove (31) is provided on one side of the bottom end of the feed port (4). The baffle groove (31) is opened on the inner wall of the filter box (3), and the baffle plate (30) is slidably mounted on the inner wall of the baffle groove (31).

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