A central drive concentrator

Abstract

The present application relates to sewage treatment equipment related technical field, disclose a kind of central drive thickener, to solve the problem that floating scum cannot be effectively separated from water body, the output end of the drive unit is connected to the scum collection seat, the scum collection seat is continuously rotated along the surface of the concentration tank, to gather floating scum to the designated area;Collection box is slidably connected to the scum collection seat, and is provided with a scum cover and a scum discharge hole;When the collection box moves to the forced guide frame, the guide wheel descends along the forced guide frame, drives the collection box and the scum cover to press down below the liquid level, the liquid level seal generated by the water entering the scum cover inside is used to discharge the gathered foam into the collection box through the scum discharge hole, to complete the collection after the gathering of floating scum.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment equipment, and in particular to a center-driven thickener. Background Technology

[0002] The center-driven thickener is a solid-liquid separation device based on the principle of gravity sedimentation. During operation, flocculants are added to the slurry or sludge to be thickened to accelerate the sedimentation of solid particles. The drive device located in the center of the tank drives the scraper arm to rotate, scraping the sludge that has settled to the bottom to the central sludge discharge port for discharge. It is widely used in mining, metallurgy, chemical and sewage treatment industries.

[0003] During the use of existing thickeners, the foam can easily affect the quality of the thickening process. Therefore, it is generally necessary to clean the foam. According to the search, Chinese patent with announcement number CN203355374U discloses a defoaming device for a center-driven thickener, which uses a float ring to concentrate the foam within the ring to prevent the foam from overflowing.

[0004] In actual application, because the foam always accumulates on the surface of the liquid, it is difficult to effectively separate it from the water, which makes it easy for the foam to mix into the washing pool. The foam contains solid components such as minerals, which not only pollute the washing pool, but also have an adverse effect on subsequent sewage treatment processes. Summary of the Invention

[0005] This invention proposes a centrally driven concentrator that has the advantages of foam aggregation and collection, thereby solving the problem mentioned in the background art where foam fails to be effectively separated from water.

[0006] To achieve the above objectives, this application adopts the following technical solution: a center-driven thickener, comprising: a thickening tank, a bridge frame disposed on the thickening tank, and a drive unit disposed on the bridge frame, wherein the output shaft end of the drive unit drives a rake frame to agitate at the bottom of the inner cavity of the thickening tank; further comprising: an annular overflow weir platform disposed on the inner side of the thickening tank, a trolley moving along the annular overflow weir platform, and a foam collecting baffle seat disposed at one end on the top of the trolley, wherein the other end of the foam collecting baffle seat is fitted with a gear column on the output shaft end of the drive unit, wherein the drive unit drives the foam collecting baffle seat to rotate circumferentially along the water surface via the gear column, and the foam collecting baffle seat realizes the collection of foam on the water surface; further comprising: a foam collecting component disposed on the surface of the foam collecting baffle seat, and a forced guide frame disposed below the bridge frame; after the foam collecting baffle seat drives the foam collecting component to move below the forced guide frame, the foam collecting component moves down along the foam collecting baffle seat and collects the collected foam according to the motion constraint of the forced guide frame on the foam collecting component.

[0007] Furthermore, the foam collection assembly includes: a collection box fitted onto the surface of the foam collecting baffle, with the four corners of the collection box connected to round rods fixed on the top of the foam collecting baffle; a spring is fixedly connected between the collection box and the foam collecting baffle; and a guide wheel is installed on the top of the collection box. It also includes a foam collecting cover located at the bottom inner side of the collection box, and a foam discharge hole located at the center of the top of the foam collecting cover and communicating with the inner cavity of the collection box. When the foam collecting baffle causes the collection box to detach from the forced guide frame, the spring pushes the collection box upwards, detaching the collection box from the water surface and positioning it above the foam accumulation area. When the foam collecting baffle causes the collection box to approach the forced guide frame, the guide wheel moves along the forced guide frame, causing the collection box to descend and compressing the spring. The descending collection box causes the bottom of the foam collecting cover to insert into the water. As the collection box causes the foam collecting cover to descend, the water seals the bottom of the foam collecting cover, and as the water level inside the foam collecting cover rises, it pushes the foam accumulated above the water to the foam discharge hole, which then inputs the foam into the collection box for collection.

[0008] Furthermore, it also includes a guide sleeve disposed inside the foam collecting cover and coaxial with the foam discharge hole, a piston disposed inside the guide sleeve, a float disposed at the bottom of the piston, and a counterweight ring; after the foam collecting cover is inserted into the water body, the water surface pushes the float upward until it enters the foam discharge hole. The float entering the foam discharge hole separates its upper and lower ends, thereby ensuring that the floating foam flows into the collecting box through the foam discharge hole and preventing water from flowing in.

[0009] Furthermore, it also includes a detection switch located on the top of the outer side of the foam collection cover and a control system electrically connected to the detection switch; after the float moves to the detection switch, the detection switch inputs an on signal to the control system, thereby determining that the float has moved to the height of the detection switch and inferring that the water has pushed the foam from the foam discharge hole into the collection box, and the foam collection work is completed normally.

[0010] Furthermore, it also includes a reset push rod disposed in the middle of the foam collecting baffle and coaxially aligned with the foam discharge hole. When the foam collecting baffle is pushed upward by the spring, it drives the foam discharge hole to be inserted into the reset push rod. When the foam collecting baffle drives the foam collecting cover to move upward synchronously, the float is constrained by the upward movement of the reset push rod and moves downward along the foam discharge hole to disengage.

[0011] Furthermore, it also includes a damping hole disposed on the top of the foam collecting cover and communicating with the foam discharge hole.

[0012] Furthermore, it also includes a supporting steel frame set at the bottom of the cable tray, a walking grid plate set on the supporting steel frame, an anti-penetration frame set inside the supporting steel frame, a limiting block set at the bottom of the supporting steel frame, a transmission column fixedly installed on the top of the limiting block, and a fixed connection between the bottom of the limiting block and the forced guide frame; when the foam collecting seat drives the collecting box close to the forced guide frame, the guide wheel pushes the forced guide frame upward, and the limiting block drives the transmission column to the bottom of the walking grid plate. The upward push of the spring, and the upward transmission through the collecting box, guide wheel, forced guide frame, limiting block and transmission column, finally applies the elastic force to the walking grid plate to realize the firmness detection of the walking grid plate.

[0013] Furthermore, it also includes an elastic push block disposed on the side of the anti-penetration barrier and a push spring disposed between the elastic push block and the anti-penetration barrier.

[0014] The beneficial effects of this invention are as follows:

[0015] In the context of advanced environmental protection industries, to effectively separate scum from water in a thickener and avoid water pollution caused by poor water treatment, this invention provides a center-driven thickener. The thickener uses a drive unit output to continuously scrape a scum-collecting baffle along the water surface, actively gathering dispersed floating scum into a concentrated area. In conjunction with a forced guide frame and guide wheels, as the collection box moves below the bridge, it automatically descends, pressing the scum-collecting hood over the gathered foam. Utilizing the liquid level seal created by water gradually entering the scum-collecting hood during its descent, the gathered foam is discharged into the collection box through the scum discharge holes, ultimately achieving the purpose of scum aggregation and collection. Furthermore, this application effectively solves the defect in existing technologies where foam floats on the liquid surface for extended periods, failing to separate from water and mixing into the washing tank. It prevents the overflow of foam containing minerals and other pollutants from the source, reducing the subsequent water treatment load and the risk of secondary water pollution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0017] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall internal three-dimensional structure of the present invention;

[0019] Figure 3This is a schematic diagram showing the installation positions and three-dimensional structure of each component on the foam collecting baffle of the present invention;

[0020] Figure 4 This is a three-dimensional cross-sectional view of the internal structure of the foam collecting baffle of the present invention;

[0021] Figure 5 For the present invention Figure 4 Enlarged structural diagram of the area at point E in the middle;

[0022] Figure 6 This is a schematic diagram showing the installation positions and three-dimensional structure of each component on the cable tray of the present invention;

[0023] Figure 7 This is a schematic diagram showing the installation positions of each component on the limiting block of the present invention and its three-dimensional cross-sectional structure;

[0024] Figure 8 For the present invention Figure 7 Enlarged structural diagram of the area at point F.

[0025] In the diagram: 1. Thickening tank; 101. Annular overflow weir; 2. Cable tray; 201. Supporting steel frame; 3. Drive unit; 301. Rake frame; 4. Walking grid; 5. Gear column; 6. Foam collection stop; 601. Pulley; 7. Collection box; 701. Guide wheel; 8. Spring; 9. Limit stop; 901. Forced guide frame; 902. Anti-penetration frame; 10. Transmission column; 11. Elastic push block; 12. Reset push rod; 13. Foam collection hood; 130. Foam discharge hole; 131. Damping hole; 14. Detection switch; 15. Guide sleeve; 16. Piston; 160. Float; 161. Counterweight ring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1, please refer to Figure 1 and Figure 2As can be seen, a cable tray 2, bolted to the top of the thickener 1, spans across it. A drive unit 3 is fixedly installed in the middle of the cable tray 2. The drive unit 3 typically consists of a motor, a reducer, and a slewing bearing. Specifically, a rake frame 301, located at the bottom of the inner cavity of the thickener 1, is fixedly installed at the output shaft end of the drive unit 3. In practical application, the slurry or sludge to be thickened is directly discharged into the inner cavity of the thickener 1 through a pipeline. Simultaneously, flocculant is added to the thickener 1 to cause the fine solid particles to form flocs, accelerating their settling speed. Finally, the solid particles gradually settle to the bottom of the tank under gravity. At the same time, the drive unit 3 drives the rake frame 301 to rotate synchronously, thereby continuously scraping the sludge deposited at the bottom of the tank to the sludge discharge port in the center of the bottom, from where it is discharged outside the tank via a discharge device.

[0028] Because foam is generated during water treatment and rises to the surface, this application aims to achieve effective separation of foam from the water by combining... Figures 1-3 It can be seen that an annular overflow weir platform 101 is provided inside the thickener 1, and a trolley 601 is installed on the top of the annular overflow weir platform 101 for movable limitation. The trolley 601 can only rotate continuously in annularly along the annular overflow weir platform 101. A foam collecting baffle 6 is bolted to the top of the trolley 601. Correspondingly, a gear column 5 is fixedly installed at the output end of the drive unit 3. The other end of the foam collecting baffle 6 is connected to the gear column 5 via a transmission sleeve. Thus, when the drive unit 3 drives the rake frame 301 to rotate inside the thickener 1, the drive unit 3 can simultaneously drive the foam collecting baffle 6 and the trolley 601 to move along the annular overflow weir platform 101 via the gear column 5. Figure 3 and Figure 4 It is evident that both ends of the foam collecting baffle 6 are equipped with arc-shaped converging baffles. As the gear column 5 drives the foam collecting baffle 6 to rotate, the foam collecting baffle 6 can intercept and gather the foam floating on the water surface to one side of the foam collecting baffle 6. As the gear column 5 drives the foam collecting baffle 6 to rotate continuously, the foam collecting baffle 6 will also comprehensively intercept and gather the foam on the surface of the water in the thickening tank 1.

[0029] Moreover, combined Figures 2-5 It can be seen that a collection box 7 is movably mounted on the surface of the foam collecting baffle 6, and the collection box 7 is located above the aforementioned foam gathering area. The four corners of the collection box 7 are guided by round rods vertically fixed to the surface of the foam collecting baffle 6, thus restricting the collection box 7 to only vertically reciprocating up and down along the round rods. Figure 3 It is clearly visible that springs 8, sleeved on the outside of the round rod, are fixedly connected between the four corners of the collection box 7 and the top of the foam collecting baffle 6. Driven by the spring force, the collection box 7 is forced to move upwards along the round rod, causing the bottom of the collection box 7 to tend to move away from the foam accumulation area. Multiple guide wheels 701, symmetrically fixed and bolted, are fixedly installed on the top of the collection box 7. Correspondingly, [the text abruptly ends here, likely due to an incomplete sentence or missing information]. Figure 1 , Figure 2 and Figure 6 It can be seen that the bottom of the bridge frame 2 is symmetrically equipped with a forced guide frame 901, and both ends of the forced guide frame 901 are equipped with forced reset inclined plates. In this way, when the collection box 7 rotates with the gear column 5 through the foam collecting baffle 6, the collection box 7 drives the guide wheel 701 to approach the forced reset inclined plate. The wedge-shaped sliding structure formed between the guide wheel 701 and the forced reset inclined plate makes the guide wheel 701 push the collection box 7 down along the round rod and compress the spring. When the collection box 7 goes down, its bottom will enter the foam collection area until its bottom end is inserted into the water.

[0030] More specifically, in combination Figures 3-5 As can be seen, the collection box 7 has a through hole running vertically inside, and a foam collecting cover 13 is fixedly connected to the bottom of the inner side of the collection box 7. A foam discharge hole 130 is opened at the top center of the foam collecting cover 13. In this way, when the collection box 7 moves downward, the foam collecting baffle 6 gathers the foam to the bottom of the collection box 7. The descending collection box 7 will cover the foam inside, and as the collection box 7 continues to move downward, the bottom of the collection box 7 inserts into the water surface. As the foam floats to the water surface, and as the collection box 7 continues to move downward and insert into the water surface, it is sealed by the water at the bottom of the foam collecting cover 13. As the water level rises along the inside of the foam collecting cover 13, the foam will overflow from the foam discharge hole 130 into the collection box 7 for collection, ultimately achieving the collection of the gathered foam.

[0031] Based on this, to further ensure that after the collection box 7 is inserted into the water, only foam overflows from the foam discharge hole 130 into the collection box 7, while sewage cannot enter the inner cavity of the collection box 7 through the foam discharge hole 130. Figure 4 and Figure 5 As shown, a guide sleeve 15, coaxially arranged with the desiccant hole 130, is fixedly installed on the top inner side of the foam collecting cover 13. The guide sleeve 15 has a groove on its side, ensuring constant communication between the inner cavity of the guide sleeve 15 and the inner cavity of the foam collecting cover 13. A piston 16 is movably fitted inside the guide sleeve 15, and the piston 16 can reciprocate vertically along the inner wall of the guide sleeve 15 and the desiccant hole 130. Furthermore, a float 160 and a counterweight ring 161 are bolted to the bottom of the piston 16. The float 160 ensures that the piston 16 always floats above the water surface; by applying an appropriate counterweight ring 161, the piston 16 has a certain downward force, allowing it to pass through the foam and preventing the foam from directly lifting the piston 16.

[0032] Moreover, from Figure 5As can be seen, a detection switch 14 is fixedly installed on the top of the outer side of the foam collection cover 13, located at the top of the foam discharge hole 130. The detection switch 14 is electrically connected to the control system, which is generally a programmable controller. Therefore, after the collection box 7 drives the foam collection cover 13 into the water, as the water level in the foam collection cover 13 increases, the foam floating above the water will be discharged from the foam discharge hole 130 into the inner cavity of the collection box 7 for centralized collection. Since the piston 16 can float in the water via the float 160, the buoyancy causes the piston 16 to move upward along the guide sleeve 15 until it enters the vent hole 130, which cuts off the vertical connection between the vent hole 130 and the upper and lower areas. Then, as the piston 16 moves further upward and reaches the detection switch 14, it will also reach the top limit of the vent hole 130. At the same time, the detection switch 14 will send an on signal to the control system. Based on this signal, the control system can know that the piston 16 has moved upward to the detection switch 14 and that the piston 16 has reached the correct position. Thus, it can be inferred that the foam collection hood 13 has completed one foam collection cycle.

[0033] Regarding the reset of piston 16, combined with Figures 3-5 It can be seen that the middle of the foam collecting baffle 6 has a reset push rod 12, which is bolted and coaxially fixed to the foam discharge hole 130. When the guide wheel 701 disengages from the forced guide frame 901, the collecting box 7, pushed by the spring 8, drives the foam collecting cover 13 to move upward synchronously, thereby causing the reset push rod 12 to insert into the foam discharge hole 130. The reset push rod 12 then synchronously retracts the piston 16 from the foam discharge hole 130 into the guide sleeve 15. Moreover, combined with Figure 5 It can be seen that the top of the foam collecting cover 13 is provided with a damping hole 131 that communicates with the inner cavity of the foam discharge hole 130. When the reset push rod 12 is inserted from the top of the foam discharge hole 130, the damping hole 131 can achieve communication between the external environment and the inner cavity of the foam discharge hole 130.

[0034] More specifically, the working process of this embodiment one in actual use is as follows:

[0035] The slurry or sludge to be concentrated and the flocculant are added into the inner cavity of the thickening tank 1 through the pipeline. The control system inputs a start signal to the drive unit 3. The drive unit 3 drives the rake frame 301 to rotate at low speed inside the thickening tank 1. The rake frame 301 scrapes the inner cavity of the thickening tank 1 and discharges the settled mud and sand to the bottom.

[0036] At the same time, the drive unit 3 drives the foam collecting baffle 6 to rotate synchronously through the gear column 5. As the foam collecting baffle 6 rotates continuously along the water surface, the foam on the water surface is collected and the collected foam is located below the collection box 7.

[0037] After the foam collecting baffle 6 moves the collecting box 7 and the guide wheel 701 to the forced guide frame 901, the guide wheel 701 contacts the forced reset inclined plate on the forced guide frame 901, causing the guide wheel 701 to push the collecting box 7 downward and compress the spring 8. The collecting box 7 drives the foam collecting cover 13 downward synchronously, covering the collected foam inside the foam collecting cover 13. As the collecting box 7 continues to move downward, the water level inside the foam collecting cover 13 rises continuously, forcing the foam to flow into the inner cavity of the collecting box 7 through the foam discharge hole 130 for collection. At the same time, the rise in the water level inside the foam collecting cover 13 causes the float 160 to drive the piston 16 upward synchronously, eventually causing the piston 16 to enter the foam discharge hole 130 through the guide sleeve 15, until the piston 16 moves upward and reaches the detection switch 14. The detection switch 14 is turned on and inputs an on signal to the control system. Based on the judgment mentioned above, the control system concludes that the upward movement of the piston 16 is normal and the foam collection work has been completed. Conversely, if the detection switch 14 does not send an on signal to the control system during the process of the guide wheel 701 passing through the forced guide frame 901, the control system determines that the piston 16 has not moved to the height of the detection switch 14 and infers that the piston 16 may have problems such as obstruction of upward movement. Therefore, after reaching this conclusion, the control system sends an activation signal to the alarm component to inform the maintenance personnel that the piston 16 is not moving upward smoothly and needs to be checked, thereby avoiding the problem that water in the foam collection hood 13 will enter the inner cavity of the collection box 7 in large quantities through the foam discharge hole 130 due to the obstruction of the piston 16 moving upward smoothly.

[0038] If the above process operates normally, as the foam collecting baffle 6 drives the collecting box 7 to disengage from the forced guide frame 901, the spring 8 pushes the collecting box 7 upward and separates it from the water. At the same time, the upward-moving collecting box 7 drives the defoaming hole 130 to insert into the reset push rod 12. Based on the downward push of the reset push rod 12 on the piston 16, the piston 16 is forced to move downward and reset, thus restoring the piston 16 to its normal position after being separated from the defoaming hole 130. During this process, as the reset push rod 12 pushes the piston 16 downward along the defoaming hole 130, since the inner cavity of the defoaming hole 130 is separated by the piston 16, the inner cavity of the defoaming hole 130 on the piston 16 is only connected to the outside through the damping hole 131. Therefore, after the reset push rod 12 pushes the piston 16 downward, the external airflow slowly enters the defoaming hole 130 through the damping hole 131, which can achieve damping and buffering, avoiding the problem of the collecting box 7 moving upward rapidly under the push of the spring.

[0039] Finally, the collection box 7 on the foam collecting baffle 6 returns to normal. As the foam collecting baffle 6 drives the collection box 7 to rotate again, it moves to the next forced guide frame 901 and collects the foam again according to the above.

[0040] Example 2 is a further improvement on Example 1. Please refer to Example 1. Figures 6-8As can be seen, multiple equidistant supporting steel frames 201 are fixedly installed at the bottom of the cable tray 2, and the surface of the supporting steel frames 201 has walking grid plates 4 that are bolted on. The walking grid plates 4 are laid in the cable tray 2 to allow operators to move on the cable tray 2. Therefore, the firmness of the fixed walking grid plates 4 is crucial to the safety of the operators. In order to ensure that the walking grid plates 4 are always in a firm arrangement, this embodiment two is as follows: Figures 6-7 It can be seen that there are two walking grids 4. Figure 2 Taking the left side as an example, the same applies to the right side. Inside the supporting steel frame 201, anti-penetration brackets 902 are movably installed near both ends of the walking grid plate 4, and the bottom ends of the two anti-penetration brackets 902 are fixedly connected to limit blocks 9. The forced guide frame 901 is fixedly installed at the bottom of the limit blocks 9 with bolts. The surface of the limit blocks 9 is fixedly installed with transmission columns 10 located below the walking grid plate 4, and there are multiple transmission columns 10. When the limit blocks 9 push the transmission columns 10 upward, the transmission columns 10 can be attached to the bottom of the walking grid plate 4.

[0041] Furthermore, in this second embodiment, an elastic push block 11 is movably installed on the side of the anti-penetration baffle 902. A push spring is fixedly connected between the elastic push block 11 and the anti-penetration baffle 902. The elastic push block 11 is pushed outward by the elastic force of the push spring. The top of the elastic push block 11 is arc-shaped, and under normal conditions, the elastic push block 11 is located below the supporting steel frame 201.

[0042] In the actual application of this embodiment 2, when the collection box 7 and the forced guide frame 901 are relatively separated, the forced guide frame 901 is pulled down by gravity and the limiting block 9 moves down. The limiting block 9 drives the anti-penetration frame 902 to move down synchronously until the top of the anti-penetration frame 902 is relatively horizontal with the surface of the walking grid 4. At this time, the two ends of the walking grid 4 are not blocked, and the operator can pass safely through the walking grid 4.

[0043] When the foam collecting baffle 6 moves the collecting box 7 close to the forced guide frame 901, the guide wheel 701 contacts the forced guide frame 901. The contact between the guide wheel 701 and the forced reset inclined plate causes the forced guide frame 901 to push the limit block 9 upward until the transmission column 10 reaches the bottom of the walking grid plate 4. At this time, the limit block 9 drives the anti-penetration baffles 902 at both ends to move upward a certain distance. The anti-penetration baffles 902 are relatively higher than the surface of the walking grid plate 4, thereby warning the operator to perform a safety inspection on the walking grid plate 4 at this time and prohibiting passage. Subsequently, as the transmission column 10 abuts against the traveling grid plate 4, if the traveling grid plate 4 is securely fixed, the transmission column 10 will constrain the upward movement of the limiting block 9. Then, as the foam collecting seat 6 drives the collecting box 7 to rotate further, it will operate according to the description in Embodiment 1. During this process, because the spring 8 pushes the collecting box 7 and the guide wheel 701 against the forced guide frame 901, it always has an upward tendency. The limiting block 9 also has an upward tendency to abut against the traveling grid plate 4 via the transmission column 10. The elastic force of the spring 8 is used to detect the installation firmness of the traveling grid plate 4. This method can be performed autonomously after the collecting box 7 moves below the forced guide frame 901. Therefore, this method enables periodic detection of the installation firmness of the traveling grid plate 4.

[0044] If the walking grid 4 is not securely installed, the collection box 7 and guide wheel 701, pushed by the spring force of spring 8, push the forced guide frame 901 upward. The forced guide frame 901 then moves further upward through the limit block 9 and transmission column 10, causing the loose walking grid 4 to move upward. The limit block 9 pushes the anti-penetration frame 902 upward, causing the elastic push block 11 to pass over the supporting steel frame 201 and be positioned above it. At the same time, since the walking grid 4 no longer restricts the movement of the limit block 9, the collection box 7, pushed by spring 8, moves upward synchronously and will not be inserted into the water. As a result, the water will not push the piston 16 to the detection switch 14. As described in Embodiment 1, the detection switch 14 will not input an on signal to the control system. The control system will then determine that the piston 16 has not reached the detection switch 14. Therefore, it is inferred that the foam collection may have malfunctioned, and the alarm component will still be activated to warn the operator.

[0045] Because after the elastic pusher 11 passes the supporting steel frame 201, even when the foam collecting baffle 6 moves the collecting box 7 away from the forced guide frame 901, and the forced guide frame 901 moves the limit block 9 and the anti-penetration baffle 902 downwards, the contact between the elastic pusher 11 and the supporting steel frame 201 will restrict the downward movement of the anti-penetration baffle 902. This prevents the limit block 9 from falling back properly, and the anti-penetration baffle 902 remains extended and higher than the walking grid 4, thus warning the operator that the walking grid 4 is impassable. More importantly, when the operator performs maintenance based on the above alarm, they can determine whether the alarm is caused by the walking grid 4 being not securely fixed by checking whether the anti-penetration baffle 902 has fallen back, thus facilitating the operator to quickly troubleshoot the problem.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A center-driven concentrator, characterized in that, include: A thickening tank (1), a bridge frame (2) installed on the thickening tank (1), and a drive unit (3) installed on the bridge frame (2). The output shaft of the drive unit (3) drives the rake frame (301) to stir at the bottom of the inner cavity of the thickening tank (1). It also includes an annular overflow weir platform (101) set inside the thickening tank (1), a trolley (601) moving along the annular overflow weir platform (101), and a foam collecting baffle (6) with one end set on the top of the trolley (601). The other end of the foam collecting baffle (6) is connected to the gear column (5) on the output shaft end of the drive unit (3). The drive unit (3) drives the foam collecting baffle (6) to rotate circumferentially along the water surface via the gear column (5). The foam collecting baffle (6) realizes the collection of foam on the water surface. It also includes a foam collecting component disposed on the surface of the foam collecting baffle (6) and a forced guide frame (901) disposed below the bridge frame (2); after the foam collecting baffle (6) drives the foam collecting component to move to below the forced guide frame (901), the foam collecting component moves down along the foam collecting baffle (6) and collects the foam that gathers, according to the movement constraint of the forced guide frame (901) on the foam collecting component.

2. The center-driven concentrator according to claim 1, characterized in that, The foam collection assembly includes: a collection box (7) fitted onto the surface of the foam baffle (6), and the four corners of the collection box (7) are fitted with round rods fixed on the top of the foam baffle (6). A spring (8) is fixedly connected between the collection box (7) and the foam baffle (6). A guide wheel (701) is installed on the top of the collection box (7). It also includes a foam collection cover (13) located at the bottom of the inner side of the collection box (7) and a foam discharge hole (130) located at the top center of the foam collection cover (13) and communicating with the inner cavity of the collection box (7). When the foam collecting baffle (6) causes the collecting box (7) to separate from the forced guide frame (901), the collecting box (7) is pushed upward by the spring (8), so that the collecting box (7) is separated from the water surface and the collecting box (7) is located above the foam gathering area; When the foam collecting baffle (6) drives the collecting box (7) to approach the forced guide frame (901), the guide wheel (701) moves along the forced guide frame (901) to make the collecting box (7) go down and compress the spring (8). The downward collecting box (7) causes the bottom of the foam collecting cover (13) to be inserted into the water. As the collecting box (7) drives the foam collecting cover (13) down, the water seals the bottom of the foam collecting cover (13) and as the water level inside the foam collecting cover (13) rises, it pushes the foam gathered above the water to the foam discharge hole (130). The foam discharge hole (130) inputs the foam into the collecting box (7) for collection.

3. The center-driven concentrator according to claim 2, characterized in that, It also includes a guide sleeve (15) disposed inside the foam collecting cover (13) and coaxial with the foam discharge hole (130), a piston (16) disposed inside the guide sleeve (15), a float (160) disposed at the bottom of the piston (16), and a counterweight ring (161). After the foam collection cover (13) is inserted into the water, the water surface pushes the float (160) upward until it enters the foam discharge hole (130). The float (160) in the foam discharge hole (130) separates its upper and lower ends, thereby ensuring that the floating foam flows into the collection box (7) through the foam discharge hole (130) and preventing water from flowing in.

4. The center-driven concentrator according to claim 3, characterized in that, It also includes a detection switch (14) located on the top of the outside of the foam collection cover (13) and a control system electrically connected to the detection switch (14); after the float (160) moves to the detection switch (14), the detection switch (14) inputs a connection signal to the control system, and the control system determines that the float (160) has moved to the height of the detection switch (14), and infers that the water has pushed the foam from the foam discharge hole (130) into the collection box (7), and the foam collection work is completed normally.

5. The center-driven concentrator according to claim 3, characterized in that, It also includes a reset push rod (12) disposed in the middle of the foam collecting baffle (6) and coaxially aligned with the foam discharge hole (130). When the foam collecting baffle (6) is pushed upward by the spring (8), it drives the foam discharge hole (130) to be inserted into the reset push rod (12). When the foam collecting baffle (6) drives the foam collecting cover (13) to move upward synchronously, the float (160) is constrained by the upward movement of the reset push rod (12) and moves downward along the foam discharge hole (130) to disengage.

6. The center-driven concentrator according to claim 5, characterized in that, It also includes a damping hole (131) disposed on the top of the foam collecting cover (13) and communicating with the foam discharge hole (130).

7. The center-driven concentrator according to claim 4, characterized in that, It also includes a support steel frame (201) set at the bottom of the cable tray (2), a walking grid plate (4) set on the support steel frame (201), an anti-penetration frame (902) set inside the support steel frame (201), a limiting block (9) set at the bottom of the support steel frame (201), a transmission column (10) fixedly installed on the top of the limiting block (9), and a fixed connection between the bottom of the limiting block (9) and the forced guide frame (901); When the foam collecting stop (6) drives the collecting box (7) to approach the forced guide frame (901), the guide wheel (701) pushes the forced guide frame (901) upward, and the limit stop (9) drives the transmission column (10) to the bottom of the walking grid (4). The upward push of the spring (8) and the upward transmission through the collecting box (7), guide wheel (701), forced guide frame (901), limit stop (9) and transmission column (10) finally apply the elastic force to the walking grid (4) to realize the firmness detection of the walking grid (4).

8. The center-driven concentrator according to claim 7, characterized in that, It also includes an elastic push block (11) disposed on the side of the anti-penetration bracket (902) and a push spring disposed between the elastic push block (11) and the anti-penetration bracket (902).

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