A sewage sedimentation tank scraper wheel profile detection method

Abstract

The present application relates to a kind of sewage sedimentation tank scraper profile detection methods, including device fixation, support adjustment, data measurement, data analysis steps, profile detection method is set for the scraper of specific shape, guarantee the compliance of scraper profile;Based on the different characteristics of scum layer and sludge layer, set sludge action end, scum action end on the same scraper, to improve the scraping effect;Set right trapezoidal scraper, in different scraping process, trapezoidal inclined direction is different, can provide the load bearing capacity and push force of front-up direction for scum, provide the push force of front-down direction for sludge, avoid the overflow of scraping object;Set gradually deepening depth from outside to inside guide groove, make scraping object concentrate to the middle of scraper, avoid the side overflow of scraping object;Set sludge push plate, when working in scum action end, block scum, when working in sludge action end, for pushing sludge, simple structure realizes multiple functions.

Description

Technical Field

[0001] This invention relates to the field of metrology and testing, and specifically to a method for detecting the profile of a scraper in a wastewater sedimentation tank. Background Technology

[0002] Wastewater treatment typically includes six steps: pretreatment (interception, screen removal of particles), primary treatment (physical treatment), secondary treatment (biological treatment), advanced treatment, discharge and reuse, and daily maintenance and management. Primary treatment mainly removes suspended and floating solids from wastewater through physical methods such as sedimentation and filtration, thereby initially improving water quality. This stage mainly includes sedimentation tanks.

[0003] Sedimentation tanks typically have a sludge scraping system, which pushes the scum on the surface of the sedimentation tank and the sludge at the bottom of the sedimentation tank to a designated location. In the prior art, the scraper of the sludge scraping system is usually a conventional plate structure, which can easily cause scum or sludge to overflow over the scraper during operation, resulting in poor sludge scraping effect and thus affecting sedimentation efficiency. At the same time, there is no method for detecting the contour of the scraper in the prior art, which also leads to non-standard scraper structure. Summary of the Invention

[0004] This invention provides a method for detecting the profile of a scraper in a wastewater sedimentation tank, characterized by the following steps: S1: Device fixing: Clamp the two side clamping parts of the scraper contour detection device on both sides of the sludge action end of the scraper, and fasten the back clamping part to the vertical surface of the sludge action end of the scraper to ensure that the vertical surface of the sludge action end is vertical. S2: Bracket Adjustment: Turn on the probe, rotate the probe bracket, and adjust its angle until the distance values ​​measured by all probes are equal, then fix the probe bracket. S3: Data Measurement: Slide the slider from the starting end to the ending end of the detection slide rail, and record the data measured by the probe during the slider's movement. S4: Data Analysis: Analyze whether the data error measured by each probe at the same time is within the specified threshold range. If so, it proves that each arc guide channel is in a vertical state without bending and has no protrusions or depressions inside. If not, it proves that each arc guide channel is bent or uneven, which is considered as unqualified in terms of contour. By analyzing the data measured by the same probe at different times, it is determined whether the radius of the arc of several arc guide channels gradually increases from both sides of the scraper to the middle. If so, it proves that the arc radius of the arc guide channel is qualified; otherwise, it is considered that the contour is unqualified. Analyze the data measured by each probe at different times to determine whether the arc center axes of each arc guide channel are parallel to each other and whether they are all parallel to the trapezoidal hypotenuse of the right-angled trapezoidal scraper. If so, it proves that the outline of the arc guide channel is qualified; otherwise, it is considered that the outline is unqualified.

[0005] Preferably, the scraper contour detection device used in the detection method includes side clamping parts on both sides, back clamping part on the back, detection slide rail, probe bracket, probe, and slider. The slider is slidably disposed in the detection slide rail 2-3, and its sliding trajectory is parallel to the bottom edge line of the right-angled trapezoidal scraper.

[0006] Preferably, the probe bracket of the scraper contour detection device used in the detection method is rotatably disposed in the slider, and its rotation axis direction is parallel to the sliding trajectory of the slider.

[0007] Preferably, the detection method is characterized in that a plurality of probes of the scraper contour detection device are vertically and evenly distributed on the probe support, and there are no fewer than 10 probes.

[0008] Preferably, the scraper is characterized in that several scrapers are arranged along the conveying system. During the operation of the conveying system, the scrapers moving to the upper part push the scum on the surface of the sewage sedimentation tank to one end of the sedimentation tank as the conveying system moves forward, and the scrapers moving to the lower part push the sludge at the bottom of the sewage sedimentation tank into the sludge collection pit as the conveying system moves forward.

[0009] Preferably, the scraper side is a right-angled trapezoidal structure, having a sludge working end, a scum working end, a sludge pusher plate, and a guide surface. The sludge working end and the scum working end are located on the upper and lower bottom surfaces of the scraper, respectively, and the cross-sectional area of ​​the sludge working end is smaller than that of the scum working end. The sludge pusher plate is hinged to the sludge working end via a 90° hinge, and a magnet or torsion spring is provided on the side of the sludge pusher plate that contacts the sludge working end. This allows the sludge pusher plate to move due to magnetic attraction or spring force when the scum working end is in operation. Under the influence of force, the sludge pusher plate, when working at the sludge working end, rotates away from the sludge working end due to its own gravity. The projection of the free end of the sludge pusher plate on the bottom surface can completely cover the scum working end. The guide surface is located on the inclined side of the right trapezoidal scraper plate. Several arc guide grooves are provided on the guide surface. The central axis of the arc guide grooves is parallel to the hypotenuse of the right trapezoid, and the radius of the arc guide grooves gradually increases from the sides to the middle of the scraper plate.

[0010] Preferably, the lower part of the scraper's scum-acting end after installation is located below the scum layer and above the upper clear water layer, and the distance between the sludge-acting end and the bottom of the sedimentation tank does not exceed the distance from the free end of the sludge pusher to the center of rotation. Beneficial effects

[0011] 1) Based on the different characteristics of the scum layer and the sludge layer, sludge action end and scum action end are set on the same scraper to improve the scraping effect.

[0012] Based on the different characteristics of the scum layer and the sludge layer, a right-angled trapezoidal scraper is set. During different scraping processes, the inclination direction of the trapezoidal slope is different, which can provide the scum with the bearing force and pushing force in the forward and upward direction, and the sludge with the pushing force in the forward and downward direction, so as to avoid the scraped object from overflowing.

[0013] The guide grooves are designed to gradually increase in depth from the outside to the inside, so that the scraped object is concentrated in the middle of the scraper and the scraped object is prevented from overflowing to the side.

[0014] The sludge pusher plate is designed to block floating scum when working at the scum-acting end and to push sludge when working at the sludge-acting end, achieving multiple functions with a simple structure.

[0015] A contour detection method is designed for scrapers of specific shapes. It has a simple structure, provides comprehensive measurement data, and ensures that the scraper contour is compliant. Attached Figure Description

[0016] Figure 1 This is a first view of the sludge scraping device of the present invention; Figure 2 This is a second view of the sludge scraping device of the present invention; Figure 3 This is a view of the scraper of the present invention; Figure 4 This is a first view of the scraper contour detection device of the present invention; Figure 5 This is a second view of the scraper contour detection device of the present invention. Detailed Implementation

[0017] See the instruction manual appendix Figure 1-2 The sludge scraping device of the present invention includes a conveying system and a scraper 1 located above the conveying system. Several scrapers 1 can be arranged along the conveying system, but only two are shown in the figure. The conveying system is a conventional belt conveying system or chain conveying system. Only the conveyor belt is shown in the figure. The related drive system, such as pulleys and gears, are conventional structures in the prior art and will not be described in detail.

[0018] The surface of the sewage sedimentation tank is covered with scum, and the bottom is covered with sludge. A sludge scraper is installed in the sewage sedimentation tank. During the operation of the conveying system, the scraper 1 at the top moves forward with the conveying system and pushes the scum on the surface of the sewage sedimentation tank to one end of the sedimentation tank for centralized treatment. The scraper 1 at the bottom moves forward with the conveying system and pushes the sludge at the bottom of the sewage sedimentation tank into the sludge collection pit, and then pumps it into the sludge treatment system.

[0019] See the instruction manual appendix Figure 3The scraper of this invention has a right-angled trapezoidal structure on its side, comprising a sludge working end 1-1, a scum working end 1-2, a sludge pusher plate 1-3, and a guide surface 1-4. The sludge working end 1-1 and the scum working end 1-2 are located on the upper and lower bottom surfaces of the scraper 1, respectively, and the cross-sectional area of ​​the sludge working end 1-1 is smaller than that of the scum working end 1-2. The sludge pusher plate 1-3 is hinged to the sludge working end 1-1 via a 90° hinge. A magnet or torsion spring is provided on the side of the sludge pusher plate 1-3 that contacts the sludge working end 1-1, so that when the scum working end 1-2 is working, the sludge pusher plate 1-3 adheres to the sludge working end 1-1 due to magnetic attraction or elastic force. During operation, the sludge pusher plate 1-3 rotates away from the sludge action end 1-1 due to its own gravity. The projection of the free end of the sludge pusher plate 1-3 on the bottom surface can completely cover the scum action end 1-2. The guide surface 1-4 is located on the inclined side of the right trapezoidal scraper plate 1. Several arc guide grooves 1-4-1 are provided on the guide surface 1-4. The arc axis of the arc guide grooves 1-4-1 is parallel to the hypotenuse of the right trapezoid. The arc radius of the arc guide grooves 1-4-1 gradually increases from the sides to the middle of the scraper plate 1. That is, the arc guide groove 1-4-1 in the middle has the largest radius and the deepest depth, while the arc guide grooves 1-4-1 on the sides have the smallest radius and the shallowest depth.

[0020] See the instruction manual appendix Figure 1-2 With the scraper structure designed above, when scraper 1 rotates to the upper part with the conveying system, i.e., when the scum action end 1-2 is working, the scum action end 1-2 pushes the scum on the surface of the sedimentation tank. As the scum is pushed forward, it is guided by the arc-shaped guide channel 1-4-1 and moves upward along the guide surface 1-4. When the scum moves upward to the sludge action end 1-1, the sludge pusher plate 1-3 blocks the scum, preventing it from moving further upward and overshooting scraper 1. The right-angled trapezoidal scraper design allows the guide surface 1-4 to carry more scum, preventing scum from overflowing and overshooting the scraper during the pushing process. When the scum action end 1-2 is working, the right-angled trapezoidal slope is in an upward-inclined state, guiding the scum upward without exerting downward pressure, thus preventing the scum from being pushed to the middle of the sedimentation tank and affecting the sedimentation effect. The radius of the arc of several arc guide grooves 1-4-1 gradually increases from both sides of the scraper to the middle. The arc guide grooves 1-4-1 closer to the middle are deeper. This can guide the scum to gather in the middle of the scraper 1 and prevent the scum from overflowing during the scraper 1 process.

[0021] When scraper 1 rotates with the conveying system to the lower part, i.e., the sludge working end 1-1, the sludge pusher 1-3 rotates away from the sludge working end 1-1 due to its own gravity. The sludge pusher 1-3 then pushes the sludge forward. Due to the 90° hinge restriction, the sludge pusher 1-3 will always remain tilted or perpendicular to the direction of movement during operation, which is more conducive to pushing the sludge. As the sludge is pushed forward, it is guided by the arc-shaped guide groove 1-4-1 and moves upward along the guide surface 1-4. At this time, the right-angled trapezoidal inclined surface is tilted downward, which will exert downward pressure on the sludge. This downward pressure will hinder the upward movement of the sludge and push it forward to accumulate, preventing the sludge from passing over the scraper. The radius of the arc of the several arc-shaped guide grooves 1-4-1 gradually increases from both sides of the scraper to the middle, and the depth of the arc-shaped guide grooves 1-4-1 closer to the middle is greater. This can guide the sludge to gather in the middle of scraper 1, preventing sludge from overflowing during the scraper 1's pushing process.

[0022] The installation requirements for the sludge scraping device of the present invention are as follows: after installation, the lower part of the scum action end 1-2 of the scraper 1 is located below the scum layer and above the upper clear water layer, and the distance between the sludge action end 1-1 and the bottom of the sedimentation tank does not exceed the distance from the free end of the sludge pusher 1-3 to the center of rotation.

[0023] This invention features a right-angled trapezoidal scraper. During operation, the inclination direction of the trapezoidal slope changes depending on the location, thus guiding different scraping targets. For lighter scum layers, it guides them upwards, working in conjunction with sludge pushers 1-3 to prevent them from being pushed into the middle of the sedimentation tank and from passing over the scraper. For heavier sludge layers, as the sludge pushers 1-3 move forward, the trapezoidal slope guides them downwards and forwards, preventing them from being pushed into the middle of the sedimentation tank and from passing over the scraper.

[0024] To ensure the guiding effect of the scraper, this invention proposes a contour detection method for the scraper.

[0025] See the instruction manual appendix Figure 4-5The scraper contour detection device 2 of the present invention is shown. The scraper contour detection device 2 of the present invention includes side clamping parts 2-1 located on both sides of the scraper, back clamping part 2-2 located on the back of the scraper, detection slide rail 2-3, probe bracket 2-4, probe 2-5, and slider 2-6. The slider 2-6 is slidably disposed in the detection slide rail 2-3, and its sliding trajectory is parallel to the bottom edge of the right-angled trapezoidal scraper 1. The probe bracket 2-4 is rotatably disposed in the slider 2-6, and its rotation axis is parallel to the sliding trajectory of the slider 2-6. A plurality of probes 2-5 are vertically and evenly distributed on the probe bracket 2-4, with no fewer than 10 probes 2-5. The probes 2-5 emit signals to the guide surface 1-4 to measure the distance between them. The sliding start end of the detection slide rail 2-3 is located in front of the scraper 1, and the sliding end end of the detection slide rail 2-3 is located behind the scraper 1, that is, the sliding trajectory covers the length direction of the scraper 1.

[0026] The specific steps of the wastewater sedimentation tank scraper contour detection method of the present invention are as follows: S1: Device fixing: Clamp the two side clamping parts 2-1 of the scraper contour detection device 2 on both sides of the sludge action end 1-1 of the scraper 1, and fasten the back clamping part 2-2 to the vertical surface of the sludge action end 1-1 of the scraper 1 to ensure that the vertical surface of the sludge action end 1-1 is in a vertical state.

[0027] S2: Bracket Adjustment: Turn on probe 2-5, rotate probe bracket 2-4, and adjust its angle until the distance values ​​measured by all probes 2-5 are equal, then fix probe bracket 2-4.

[0028] In step S2, adjust the angle of the probe bracket 2-4 so that it is parallel to the arc axis of several arc guide grooves 1-4-1 or the hypotenuse of the right trapezoid of the scraper 1.

[0029] S3: Data measurement: Slide slider 2-6 from the starting end of detection slide rail 2-3 to the ending end of detection slide rail 2-3, and record the data measured by probe 2-5 during the sliding of slider 2-6.

[0030] S4: Data Analysis: Analyze whether the data error measured by each probe 2-5 at the same time is within the specified threshold range. If so, it proves that each arc guide groove 1-4-1 is in a vertical state without bending and without protrusions or depressions inside. If not, it proves that each arc guide groove 1-4-1 has bending or unevenness, which is considered as unqualified in terms of contour. Analyze the data measured by the same probe 2-5 at different times to determine whether the radius of the arc of several arc guide channels 1-4-1 gradually increases from both sides of the scraper to the middle. If so, it proves that the arc radius of the arc guide channel 1-4-1 is qualified. If not, it is considered that the outline is unqualified. Analyze the data measured by each probe 2-5 at different times to determine whether the arc center axes of each arc guide groove 1-4-1 are parallel to each other and whether they are all parallel to the hypotenuse of the right trapezoid. If so, it proves that the outline of the arc guide groove 1-4-1 is qualified; otherwise, it is considered that the outline is unqualified.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention; any equivalent methods or structures made using the content of the present invention are included within the patent protection scope of the present invention.

Claims

1. A method for detecting the profile of a scraper in a wastewater sedimentation tank, characterized in that: Includes the following steps: S1: Device Fixing: Clamp the two side clamping parts of the scraper contour detection device to both sides of the sludge action end of the scraper, and fasten the back clamping part to the vertical surface of the sludge action end of the scraper, ensuring that the vertical surface of the sludge action end is vertical; the side of the scraper is a right-angled trapezoidal structure, having a sludge action end, a scum action end, a sludge pusher plate, and a guide surface, wherein the sludge action end and the scum action end are located on the upper and lower bottom surfaces of the scraper, respectively, and the cross-sectional area of ​​the sludge action end is smaller than that of the scum action end. The sludge pusher plate is hinged to the sludge action end by a 90° hinge, and the contact area between the sludge pusher plate and the sludge action end is... A magnet or torsion spring is provided on one side, so that when working at the scum action end, the sludge pusher plate is attached to the sludge action end due to magnetic attraction or elastic force. When working at the sludge action end, the sludge pusher plate rotates away from the sludge action end due to its own gravity. The projection of the free end of the sludge pusher plate in the bottom direction can completely cover the scum action end. The guide surface is located on the inclined side of the right-angled trapezoidal scraper. Several arc guide grooves are provided on the guide surface. The arc axis of the arc guide grooves is parallel to the hypotenuse of the right-angled trapezoid, and the arc radius of the arc guide grooves gradually increases from the sides to the middle of the scraper. S2: Bracket Adjustment: Turn on the probe, rotate the probe bracket, and adjust its angle until the distance values ​​measured by all probes are equal, then fix the probe bracket; the probes of the scraper contour detection device used in the detection method are vertically and evenly distributed on the probe bracket, with no less than 10 probes; S3: Data Measurement: Slide the slider from the starting end to the ending end of the detection slide rail, and record the data measured by the probe during the slider's movement. S4: Data Analysis: Analyze whether the data error measured by each probe at the same time is within the specified threshold range. If so, it proves that each arc guide channel is in a vertical state without bending and has no protrusions or depressions inside. If not, it proves that each arc guide channel is bent or uneven, which is considered as unqualified in terms of contour. By analyzing the data measured by the same probe at different times, it is determined whether the radius of the arc of several arc guide channels gradually increases from both sides of the scraper to the middle. If so, it proves that the arc radius of the arc guide channel is qualified; otherwise, it is considered that the contour is unqualified. Analyze the data measured by each probe at different times to determine whether the arc center axes of each arc guide channel are parallel to each other and whether they are all parallel to the trapezoidal hypotenuse of the right-angled trapezoidal scraper. If so, it proves that the outline of the arc guide channel is qualified; otherwise, it is considered that the outline is unqualified.

2. The method for detecting the profile of a scraper in a sewage sedimentation tank as described in claim 1, characterized in that, The scraper contour detection device used in the detection method includes side clamping parts on both sides, back clamping parts on the back, detection slide rail, probe bracket, probe, and slider. The slider is slidably disposed in the detection slide rail, and its sliding trajectory is parallel to the bottom edge of the right-angled trapezoidal scraper.

3. The method for detecting the profile of a scraper in a sewage sedimentation tank as described in claim 2, characterized in that, The probe bracket of the scraper contour detection device used in the detection method is rotatably mounted in the slider, and its rotation axis is parallel to the sliding trajectory of the slider.

4. The method for detecting the profile of a scraper in a sewage sedimentation tank as described in claim 1, characterized in that, Several scrapers are arranged along the conveying system. During the operation of the conveying system, the scrapers at the top push the scum on the surface of the sewage sedimentation tank to one end of the sedimentation tank as the conveying system moves forward, while the scrapers at the bottom push the sludge at the bottom of the sewage sedimentation tank into the sludge collection pit as the conveying system moves forward.

5. The method for detecting the profile of a scraper in a sewage sedimentation tank as described in claim 1, characterized in that, After installation, the lower part of the scraper's scum-acting end is located below the scum layer and above the upper clear water layer, and the distance between the sludge-acting end and the bottom of the sedimentation tank does not exceed the distance from the free end of the sludge pusher plate to the center of rotation.

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