Chain slag scraping type mechanical bar screen machine

Abstract

The present invention discloses a chain slag scraping type mechanical bar screen machine, and relates to the field of sewage treatment equipment, the chain slag scraping type mechanical bar screen machine comprises: a fixed grid bar arranged in a sewage pool; the chain slag scraping structure is arranged on the upstream face of the fixed grid bar, the chain slag scraping structure comprises a rotatable working chain and a plurality of slag scraping tooth rake assemblies, the slag scraping tooth rake assemblies are evenly arranged on the periphery of the working chain, and the slag scraping tooth rake assemblies are matched with the guide rail grooves of the working chain; the driving structure is connected with the working chain, and in the rotating process of the working chain, when the working chain rotates to be close to one side of the fixed grid bar, the working chain moves upwards; the slag scraping tooth rake assembly is matched with the gaps of the fixed grid bars; according to the cleaner, the chain slag scraping structure is arranged on the upstream face of the fixed grid bar, the problem of secondary pollution can be avoided, in addition, the chain slag scraping structure can discharge pollutants intercepted on the fixed grid bar to the bank side of a sewage pool, the water passing effect of the fixed grid bar is improved, and the water blocking problem is avoided.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment equipment, and more specifically, relates to a chain scraping type mechanical grille decontamination machine. Background Art

[0002] Pretreatment is an indispensable process in sewage treatment. Pretreatment mainly intercepts slag and sand in sewage through physical filtration and sedimentation to ensure the stable operation of subsequent processes.

[0003] The slag interception equipment in the pretreatment area of ​​the sewage treatment plant is mainly divided into three types according to the gap between the bars: coarse grids (25-100mm), medium grids (10-25mm), and fine grids (1.5-10mm). They are used to intercept larger suspended or floating solid pollutants in the sewage.

[0004] There are various types of middle screen structures commonly used in the market, mainly including rotary rake tooth screen cleaner, back rake screen cleaner, etc. The plastic tooth rake of the rotary rake tooth screen cleaner is inserted into the connecting shaft, and the driving sprocket drives the tooth rake to rotate continuously. The screen is installed at an angle, and the tooth rake on the water-facing side runs upward. The tooth rake intercepts and scoops the screen residue and transports it to the upper part of the equipment and falls off. The return tooth rake goes down on the backwater side, and turns to the bottom of the channel by dragging the sprocket and then goes up on the water-facing side to enter the next residue interception cycle. When the sewage passes through the middle screen of this structure, it needs to pass through the rake tooth gap twice, which has a large resistance to the sewage. The tooth rake goes down behind the screen on the return journey. When the residue on the tooth rake is not completely cleaned, it is brought behind the screen. It falls off under the impact of the water flow and enters the back of the screen with the water flow, causing secondary pollution. Since the tooth rake needs to rotate through the guide wheel at the bottom, the bottom guide wheel wears quickly in the sewage environment, and a large gap is easily generated between the tooth rake and the channel bottom, causing slag leakage. The sewage passes through the tooth rake twice, which creates a large resistance to the water flow. In the event of a sudden large amount of water, it is easy to cause the tooth rake connecting shaft to be overloaded and bent, derailed, and other faults, making it unable to operate normally. In addition, the tooth rake cannot salvage larger slag.

[0005] The metal bars of the back-rake screen cleaner are fixed at an angle in the channel, and the chain drives the toothed rake to pass through the gaps between the bars on the backwater side of the bars to salvage the debris intercepted on the water-facing side of the bars. This type of screen still has the problem of secondary pollution, and the large volume of debris intercepted in front of the screen is not easy to salvage. Summary of the invention

[0006] The purpose of the present invention is to address the deficiencies in the prior art and to provide a chain scraper type mechanical screen cleaner, in which a chain scraper structure is arranged on the water-facing surface of a fixed grid bar, so that the pollutants intercepted on the chain scraper structure will not climb over the fixed grid bars, thereby avoiding the problem of secondary pollution. In addition, the chain scraper structure can also discharge the pollutants intercepted on the fixed grid bars to the shore of the sewage pool, thereby improving the water passing effect of the fixed grid bars and avoiding the problem of water blocking.

[0007] To achieve the above object, the present invention provides a chain slag scraping type mechanical grille sewage cleaner, comprising:

[0008] Fixed grid bars, which are used to be arranged in a sewage tank;

[0009] A chain slag scraping structure, which is arranged on the water-facing side of the fixed grid bars. The chain slag scraping structure includes a rotatable working chain and a plurality of slag scraping rake assemblies. The slag scraping rake assemblies are uniformly arranged on the outer periphery of the working chain, and the slag scraping rake assemblies are matched with the guide rail grooves of the working chain;

[0010] A driving structure, which is connected to the working chain. During the rotation of the working chain, when the working chain rotates to the side close to the fixed grid bars, the working chain moves upward;

[0011] The slag scraping rake assemblies are matched with the gaps of the fixed grid bars.

[0012] Optionally, the slag scraping rake assembly includes a rake part and a connecting part which are connected to each other. The rake part is arranged corresponding to the width of the fixed grid bars. A pair of traveling wheels are respectively arranged at both ends of the connecting part. The traveling wheels are slidably arranged in the guide rail grooves, and the traveling wheels are matched with the width of the guide rail grooves.

[0013] Optionally, the material of the traveling wheels is a non-metallic material.

[0014] Optionally, the interval distance of the slag scraping rake assemblies is greater than 1.5 m.

[0015] Optionally, the driving structure further includes a driving sprocket and a dragging sprocket. The upper part of the working chain is wound around the outer periphery of the driving sprocket, and the lower part of the working chain is wound around the outer periphery of the dragging sprocket.

[0016] Optionally, the driving structure further includes a driving shaft and a motor reducer. One end of the driving shaft is connected to the output end of the motor reducer through a driving chain. Two driving sprockets are further arranged on the part of the driving shaft located inside the machine shell.

[0017] Optionally, the motor reducer is arranged on the machine shell. The part of the working chain located above the sewage tank moves horizontally. A screw conveyor is arranged below the horizontally moving part of the working chain.

[0018] Optionally, the bottom of the fixed grid bars extends to the bottom of the sewage tank.

[0019] Optionally, the fixed grid bars form an angle less than 75° with the horizontal direction.

[0020] The present invention provides a chain slag scraping type mechanical grille sewage cleaner, and its beneficial effects are as follows:

[0021] 1. On one side of the working chain close to the fixed grille bars in this sewage cleaner, it moves upward. In this way, the pollutants on the fixed grille bars can be scraped off by the slag scraping tooth rake assembly moving upward. The slag scraping tooth rake assembly drives the pollutants to the shore of the sewage pool. Under the action of gravity, the pollutants fall into the screw conveyor. In this way, when the slag scraping tooth rake assembly rotates back into the sewage pool again, there will be no pollutants remaining on the slag scraping tooth rake assembly, improving the slag discharging effect of the sewage pool.

[0022] 2. In this sewage cleaner, the fixed grille bars are inclined and arranged in the sewage pool, and the bottom of the fixed grille bars is connected to the bottom of the sewage pool. In this way, even if the pollutants in the water flow are not intercepted by the chain slag scraping structure, they will not flow to the downstream of the water pool, and secondary pollution behind the grille can be avoided.

[0023] 3. In this sewage cleaner, a plurality of slag scraping tooth rake assemblies are arranged at intervals on the working chain, and a pair of traveling wheels are arranged between each slag scraping tooth rake assembly and the working chains at both ends. In this way, compared with the existing structure where traveling wheels are arranged on each chain pin of the working chain, the number of traveling wheels can be greatly reduced, and the operation cost of the chain slag scraping structure can be reduced.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0026] Figure 1 The structural schematic diagram of a chain slag scraping type mechanical grille sewage cleaner according to an embodiment of the present invention is shown.

[0027] Figure 2 Shown is Figure 1 the right view of

[0028] Figure 3 The top view of the positional relationship between the slag scraping tooth rake assembly and the fixed grille bars according to an embodiment of the present invention is shown.

[0029] Description of the reference numerals in the drawings:

[0030] 1. Fixed grid bars; 2. Working chain; 3. Scraper rake assembly; 301. Rake part; 302. Connection part; 4. Guide rail groove; 5. Traveling wheels; 6. Driving sprocket; 7. Dragging sprocket; 8. Driving shaft; 9. Motor reducer; 10. Machine housing; 11. Guide sprocket; 12. Screw conveyor; 13. Water flow direction. Detailed implementation

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] The present invention provides a chain scraping type mechanical grille sewage remover, comprising:

[0033] Fixed grid bars, which are used to be arranged in the sewage tank;

[0034] A chain scraping structure, which is arranged on the water-facing side of the fixed grid bars. The chain scraping structure includes a rotatable working chain and a plurality of scraper rake assemblies. The scraper rake assemblies are evenly arranged on the outer periphery of the working chain, and the scraper rake assemblies are matched with the guide rail grooves of the working chain;

[0035] A driving structure, which is connected to the working chain. During the rotation of the working chain, when the working chain rotates to the side close to the fixed grid bars, the working chain moves upward;

[0036] The scraper rake assemblies are matched with the fixed grid bars.

[0037] Optionally, the scraper rake assembly includes a rake part and a connection part that are connected to each other. The rake part is arranged corresponding to the width of the fixed grid bars. A pair of traveling wheels are respectively arranged at both ends of the connection part, and the traveling wheels are slidably arranged in the guide rail grooves, and the traveling wheels are matched with the width of the guide rail grooves.

[0038] Specifically, the decontamination machine arranges the chain slag scraping structure on the water-facing side of the fixed grid bars. Compared with the existing structure where the fixed grid bars are arranged inside the chain slag scraping machine, the intercepted pollutants scraped off the fixed grid bars by the chain slag scraping structure will not flow to the downstream of the pool, avoiding the problem of secondary pollution. Additionally, in the chain slag scraping structure, multiple slag scraping rake assemblies are arranged at intervals on the working chain. The two ends of each slag scraping rake assembly are respectively connected to the working chain through a pair of traveling wheels. In this way, the guide rail groove on the working chain and the traveling wheels on the slag scraping rake assembly can cooperate with each other to prevent the slag scraping rake assembly from shifting and running off in the horizontal direction. The spaced slag scraping rake assemblies can also clean and transfer the pollutants intercepted on the fixed grid bars. Moreover, arranging the slag scraping rake assemblies on the working chain can also reduce the number of traveling wheels. Compared with the existing structure where traveling wheels are arranged on each link pin of the working chain, it can reduce the operating cost of the slag scraping rake assembly while not affecting the decontamination effect.

[0039] Optionally, the traveling wheels are made of non-metallic materials.

[0040] Optionally, the spacing distance between the slag scraping rake assemblies is greater than 1.5 m.

[0041] Specifically, the traveling wheels of the slag scraping rake assemblies are made of non-metallic materials, which can extend the wear time of the traveling wheels and improve corrosion resistance. The spacing distance between the slag scraping rake assemblies is controlled within 1.5 m, which can ensure that during the normal rotation of the working chain, the slag scraping rake assemblies can timely remove the pollutants intercepted on the fixed grid bars, avoiding the occurrence of water blockage problems caused by excessive pollutants on the fixed grid bars.

[0042] Optionally, the working chain on the side close to the fixed grid bars is the upward-running working chain.

[0043] Optionally, the motor reducer is arranged on the machine shell. The part of the working chain located above the sewage pool moves horizontally, and a screw conveyor is arranged below the horizontal moving part of the working chain.

[0044] Specifically, the working chain is arranged on the water-facing side of the fixed grid bars, and the inclination angle of the working chain below the liquid level is parallel to that of the fixed grid bars. After the fixed grid bars intercept the pollutants in the water flow, the pollutants stay on the fixed grid bars. The working chain close to the fixed grid bars runs upward. The rake part on the working chain is embedded into the gaps of the fixed grid bars, which can scrape off the pollutants staying on the fixed grid bars and drive the pollutants to move upward. After the pollutants are taken away from the water surface by the rake part, due to the arrangement of the guiding sprocket, the movement direction of the working chain is changed, and the working chain moves horizontally. The pollutants on the rake part fall into the screw conveyor under the action of gravity. The pollutants are centrally collected and subjected to subsequent treatment. The working chain bypasses the driving sprocket and rotates again towards the liquid level direction, and the rake part also returns to the water tank again with the driving sprocket. In this way, the pollutants remaining on the fixed grid bars are transferred cyclically to avoid the problem of water blockage.

[0045] Optionally, the driving structure includes a driving sprocket and a dragging sprocket. The upper part of the working chain is wound around the outer periphery of the driving sprocket, and the lower part of the working chain is wound around the outer periphery of the dragging sprocket.

[0046] Optionally, the driving structure further includes a driving shaft and a motor reducer. One end of the driving shaft is connected to the output end of the motor reducer through a driving chain, and two driving sprockets are also arranged on the part of the driving shaft located inside the machine shell.

[0047] Specifically, a motor reducer is arranged in the chain slag scraping structure. The motor reducer is connected to the driving shaft through a driving chain, and the driving chain is connected to the end of the driving shaft. In this way, the rotation of the driving shaft is realized. Two driving sprockets are arranged on the part of the driving shaft located inside the machine shell, and the driving sprockets are connected to the working chain one by one. In this way, the working chain can drive the slag scraping rake assembly to rotate, and the fixed grid bars are regularly scraped and cleaned by the slag scraping rake assembly.

[0048] Optionally, the bottom of the fixed grid bars extends to the bottom of the sewage tank.

[0049] Optionally, a tensioning wheel is arranged inside the working chain.

[0050] Specifically, the height of the fixed grid bars corresponds to the height of the water surface in the pool, so that the grid residues in the water flow that are larger than the gaps between the grid bars are intercepted by the grid bars, and there will be no problem of secondary pollution caused by the grid residues flipping to the back of the fixed grid bars; in addition to being wound around the driving sprocket and the dragging sprocket, a tensioning wheel is also provided on the working chain. By adjusting the tensioning wheel, the tension of the working chain is changed. When the tension of the working chain is smaller, the working chain will drive the slag scraping rake assembly to insert deeper into the fixed grid bars. On the contrary, when the tension of the working chain is larger, the working chain is tightened, so that the depth of the slag scraping rake assembly on the working chain extending into the fixed grid bars is smaller.

[0051] Embodiment

[0052] As Figures 1 to 3 shown, the present invention provides a chain slag scraping type mechanical grille sewage remover, including:

[0053] Fixed grid bars 1, arranged in the sewage pool;

[0054] A chain slag scraping structure, arranged on the water-facing side of the fixed grid bars 1. The chain slag scraping structure includes a rotatable working chain 2 and a plurality of slag scraping rake assemblies 3. The slag scraping rake assemblies 3 are uniformly arranged on the outer periphery of the working chain 2, and the slag scraping rake assemblies 3 are matched with the guide rail grooves 4 of the working chain 2;

[0055] A driving structure, the driving structure is connected to the working chain 2. During the rotation of the working chain 2, when the working chain 2 rotates to the side close to the fixed grid bars 1, the working chain 2 moves upward;

[0056] The slag scraping rake assembly 3 is matched with the fixed grid bars 1.

[0057] In this embodiment, the slag scraping rake assembly 3 includes a rake part 301 and a connecting part 302 connected to each other. The rake part 301 is arranged corresponding to the width of the fixed grid bars 1. A pair of traveling wheels 5 are respectively arranged at both ends of the connecting part 302. The traveling wheels 5 are slidably arranged in the guide rail grooves 4, and the traveling wheels 5 are matched with the width of the guide rail grooves 4.

[0058] In this embodiment, the material of the traveling wheels 5 is a non-metallic material.

[0059] In this embodiment, the interval distance of the slag scraping rake assemblies 3 is greater than 1.5 m.

[0060] In this embodiment, the driving structure further includes a driving sprocket 6 and a dragging sprocket 7. The upper part of the working chain 2 is wound around the outer periphery of the driving sprocket 6, and the lower part of the working chain 2 is wound around the outer periphery of the dragging sprocket 7.

[0061] In this embodiment, the driving structure further includes a driving shaft 8 and a motor speed reducer 9. One end of the driving shaft 8 is connected to the output end of the motor speed reducer 9 through a driving chain. Two driving sprockets 6 are also arranged on the part of the driving shaft 8 located inside the machine shell 10.

[0062] In this embodiment, the motor speed reducer 9 is arranged on the machine shell 10. The part of the working chain 2 located above the sewage tank bypasses the guiding sprocket 11 and then moves horizontally. A screw conveyor 12 is arranged below the horizontal moving part of the working chain 2.

[0063] In this embodiment, the bottom of the fixed grid bar 1 extends to the bottom of the sewage tank.

[0064] In this embodiment, a tensioning wheel is arranged inside the working chain 2.

[0065] In summary, the sewage cleaner inclines the fixed grid bar 1 below the liquid level of the sewage tank. Grid residues larger than the grid bar gaps remain on the fixed grid bar 1. When the working chain 2 drives the slag scraping rake assembly 3 to move to one side of the fixed grid bar 1, the rake part 301 is inserted between the grid bars of the fixed grid bar 1. As the working chain 2 gradually rises, the rake part 301 scrapes the grid residues from the fixed grid bar 1 and takes the grid residues away from the water surface. When the working chain 2 turns along the guiding sprocket 11 and moves in the horizontal direction, due to the gravity of the grid residues on the rake part 301, the grid residues fall into the screw conveyor 12 and are collected and processed centrally.

[0066] The embodiments of the present invention have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A chain scraping mechanical grille decontamination machine, characterized in that: include: Fixed gratings for setting in sewage tanks; A chain scraping structure is arranged on the water-facing surface of the fixed grid bar, the chain scraping structure comprises a rotatable working chain and a plurality of scraping tooth rake assemblies, the scraping tooth rake assemblies are evenly arranged on the periphery of the working chain, and the scraping tooth rake assemblies cooperate with the guide rail groove of the working chain; A driving structure, wherein the driving structure is connected to the working chain, and when the working chain rotates to a side close to the fixed grid bar during the rotation of the working chain, the working chain moves upward; The scraper tooth rake assembly cooperates with the fixed grid bars.

2. The chain scraper type mechanical grille decontamination machine according to claim 1 is characterized in that: The scraper tooth rake assembly includes a tooth rake part and a connecting part which are connected to each other. The tooth rake part is arranged corresponding to the width of the fixed grid bar. A pair of running wheels are arranged at both ends of the connecting part respectively. The running wheels are slidably arranged in the guide rail groove, and the running wheels are matched with the width of the guide rail groove.

3. The chain scraper type mechanical grille decontamination machine according to claim 2 is characterized in that: The material of the running wheel is non-metallic material.

4. The chain scraper type mechanical grille decontamination machine according to claim 1, characterized in that: The spacing distance between the scraper tooth rake assemblies is greater than 1.5m.

5. The chain scraper type mechanical grille decontamination machine according to claim 1, characterized in that: The driving structure comprises a driving sprocket and a dragging sprocket. The upper portion of the working chain is wound around the outer periphery of the driving sprocket, and the lower portion of the working chain is wound around the outer periphery of the dragging sprocket.

6. The chain scraper type mechanical grille decontamination machine according to claim 5, characterized in that: The driving structure also includes a driving shaft and a motor reducer. One end of the driving shaft is connected to the output end of the motor reducer through a driving chain. Two driving sprockets are also arranged on the part of the driving shaft inside the casing.

7. The chain scraper type mechanical grille decontamination machine according to claim 6, characterized in that: The motor reducer is arranged on the casing, the part of the working chain located above the sewage pool moves in the horizontal direction, and a screw conveyor is arranged below the horizontally moving part of the working chain.

8. The chain scraper type mechanical grille decontamination machine according to claim 1, characterized in that: The bottom of the fixed grid bar extends to the bottom of the sewage pool.

9. The chain scraper type mechanical grille decontamination machine according to claim 1, characterized in that: The fixed grid bars form an angle smaller than 75° with the horizontal direction.

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