Sludge depth detection device for sewage sedimentation tank and detection method thereof

Abstract

The invention relates to the technical field of sludge depth detection, and discloses a sewage sedimentation tank sludge depth detection device and a detection method thereof.The counterweight device comprises a floating seat, a gravity center adjusting air bag is fixedly installed on the outer edge of the bottom of the floating seat, and a storage seat is fixedly assembled at the bottom of the gravity center adjusting air bag; a mud breaking device is contained and installed in the containing base, air storage bags are installed at the center of the interior of the floating base, floating bags communicating with the four air storage bags are installed on the periphery of the floating base in a nested mode, and a small air pump is fixedly installed in the floating base; the input end and the output end of the small air pump are connected with the air storage bag and the gravity center adjusting air bag through air guide pipes correspondingly, the sludge depth is measured in the mode of hovering on the sludge surface, measurement is more accurate, the sinking resistance of the counterweight device on the sludge surface is greatly reduced, the counterweight device stably floats on the sludge surface conveniently, and the balance weight device is prevented from being damaged. And the counterweight device can be suspended on the surface of the sludge to a great extent.

Description

Technical Field

[0001] The invention relates to the technical field of sludge depth detection, and in particular to a sludge depth detection device and a detection method for a sewage sedimentation tank. Background Art

[0002] In the field of sewage treatment, a sedimentation tank that uses sedimentation to separate suspended matter in wastewater is an important part of the sewage treatment system. Excessive sludge accumulation in the sedimentation tank often causes a large amount of activated sludge to rise, so that it does not have time to settle and enters the external drainage water intake well with the effluent, affecting the effluent water quality. At present, the use of laser sensors on the market to detect the sludge thickness in the sludge sedimentation tank is a non-contact measurement method. However, the use of laser sensors in sewage tanks is easily restricted to a large extent and has many defects: suspended particles in the sludge may absorb or scatter the laser beam, causing the beam to attenuate, thereby affecting the accuracy of the measurement, and if the sludge surface is uneven or there is a hard shell layer, the laser beam may be reflected from different angles, causing the reflected light signal received by the sensor to be inconsistent with the actual sludge thickness. In the sludge sedimentation tank, the laser beam may be reflected and scattered multiple times, causing a multipath effect, thereby affecting the measurement accuracy. The sludge surface may fluctuate due to water flow, stirring or other factors. This fluctuation may affect the measurement result of the laser sensor. Therefore, there are many disadvantages in the method of using laser sensors to measure sludge depth. Based on this, the present application provides a contact measurement method.

[0003] In a sewage treatment sedimentation tank sludge thickness detection device with application number CN201921483968.9, a counterweight seat is fixedly installed at the bottom of the vertical rod. The counterweight seat has a trapezoidal structure, which is convenient for measuring the sludge thickness. The measured value of the sludge thickness in the sedimentation tank is accurate, which is helpful for the staff to judge whether to carry out sewage discharge work; in a sewage treatment sedimentation tank sludge thickness detection device with application number CN202022759677.7, the thickness of the sludge in the sewage treatment sedimentation tank can be quickly calculated according to the height of the counterweight block in the sedimentation tank measured by the measuring ruler.

[0004] However, as the sediment thickness in the sedimentation tank further increases, the sludge at the bottom is under pressure from the sludge layer above, causing water to be squeezed out and the sludge to become more compacted and dense, so a hard crust layer is inevitable. In this way, when the counterweight block moves downward in the sedimentation tank, when the density increases after the sludge is settled and a hard crust area appears, it will seriously hinder the downward movement of the counterweight block, which will affect the sinking action of the counterweight block, causing the counterweight block to stagnate and a false bottoming situation to occur, which directly leads to inaccurate thickness measurement. In addition, the newly deposited sludge contains more water and smaller solid particles, and the density of the sludge layer is very small. When the counterweight block contacts the upper layer of the sludge layer, it will be directly inserted into the sludge layer. In this way, when the counterweight block is used to detect the height of the top of the sludge layer, the counterweight block will directly sink into the sludge layer, causing detection errors, resulting in a low value of the sludge layer thickness, affecting the detection accuracy.

[0005] Therefore, the present invention proposes a sewage sedimentation tank sludge depth detection device and a detection method thereof to solve the above-mentioned problem. Summary of the invention

[0006] The purpose of the present invention is to provide a sewage sedimentation tank sludge depth detection device and a detection method thereof to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sludge depth detection device for a sewage sedimentation tank, comprising a lifting rope and a counterweight connected thereto, the counterweight comprising a floating seat, a center of gravity adjustment air bag is fixedly installed on the bottom outer edge of the floating seat, a storage seat is fixedly installed on the bottom of the center of gravity adjustment air bag, a mud breaker is stored and installed in the storage seat, an air storage bag is installed at the center of the floating seat, floating bags connected to four groups of air storage bags are nested and installed all around the floating seat, a small air pump is fixedly installed inside the floating seat, and the input and output ends of the small air pump are respectively connected to the air storage bag and the center of gravity adjustment air bag through air ducts.

[0008] Preferably, a water inlet channel is opened inside the floating seat, a small water pump is fixedly installed in the water inlet channel, a guide channel in the vertical direction is arranged in the middle of the center of gravity adjustment air bag, and the guide channel and the water inlet channel correspond to each other, a fixed pipe is fixedly connected to the top of the mud breaker, and a telescopic water guide pipe is fixedly connected between the fixed pipe and the water inlet channel.

[0009] Preferably, a receiving groove adapted to the mud breaker is provided at the bottom of the receiving seat, and the mud breaker is slidably assembled inside the receiving groove, and a hole with the same cross-sectional size as the guide channel is provided in the middle of the top of the receiving seat.

[0010] Preferably, the mud breaker includes six groups of conical flexible unit plates with the same structure, the bottom ends of the six groups of conical flexible unit plates are integrally formed and connected together, and the top ends of the six groups of conical flexible unit plates extend along the inner wall of the accommodating groove into the guide channel and are integrally formed and connected together to form a traction seat, and an elastic unit plate is connected between two adjacent groups of conical flexible unit plates, and multiple groups of conical flexible unit plates and elastic unit plates form a mud breaking cone.

[0011] Preferably, pulling ropes are fixed around the top of the traction seat, and the four groups of pulling ropes correspond to the four groups of floating bags one by one. The top ends of the four groups of pulling ropes pass upward through the guide channel and the floating seat and are fixedly connected to the outer side of the bottom of the corresponding floating bag.

[0012] Preferably, a first storage groove matching the air storage bag is provided inside the floating seat, and a second storage groove connected to the first storage groove is provided around the floating seat. The second storage groove is fan-shaped, and each group of floating bags is embedded in the second storage groove. Guide holes for accommodating pulling ropes are provided inside the floating seat and at positions corresponding to the floating bags.

[0013] Preferably, an air guide channel communicating with the first receiving groove is provided at the bottom of the floating seat, and the small air pump is fixedly installed in the air guide channel.

[0014] Preferably, the water inlet channel extends to the outside of the floating seat, the floating seat and the storage seat are circular seats with the same diameter, the outer diameter of the center of gravity adjustment air bag is the same as that of the floating seat, a lifting ear is fixed in the middle of the top of the floating seat, and the bottom end of the lifting rope is fixedly connected to the lifting ear.

[0015] Preferably, it also includes a lifting device, the output end of the lifting device is fixedly connected to the lifting rope, and a displacement sensor is embedded in the bottom of the floating seat.

[0016] Sewage sedimentation tank sludge depth detection method, the detection method steps are: S1: The counterweight at the bottom of the lifting rope is driven downward by the lifting equipment. When the counterweight reaches the top of the sewage pool, the displacement sensor starts to work. The depth value of the sewage pool is recorded as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward movement of the counterweight in real time; S2: Before the counterweight comes into contact with the sludge surface, the small air pump in the counterweight works to force the gas inside the air storage bag and the floating bag into the center of gravity adjustment air bag through the air guide tube, causing the center of gravity adjustment air bag to expand and be in a stretched state, and the floating bag shrinks into the second storage tank. The floating seat, the center of gravity adjustment air bag and the mud breaker are combined into a cylindrical detector, which reduces the buoyancy of the counterweight after it is immersed in sewage, making it easier for the counterweight to be immersed in sewage, and the gravity of the counterweight is greater than the buoyancy of the counterweight immersed in water, ensuring the penetration of the counterweight into the sludge during the downward process; S3: When the counterweight contacts the sludge surface, since the mud breaker is stored inside the storage seat, its bottom is an arc-shaped surface at this time, which increases the resistance to sinking into the sludge when penetrating the sludge surface, driving the counterweight to continue to move downward. At this time, the small air pump works to force the gas in the center of gravity adjustment air bag into the air storage bag and the floating bag, causing the four groups of floating bags to expand synchronously, and then extend out of the second storage groove to form an umbrella-shaped floating structure, increasing the buoyancy of the counterweight when it contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the area of ​​contact with the sludge layer, increase the sinking resistance, and thus improve stability and buoyancy. At this time, the center of gravity adjustment air bag is in a compressed state, and the center of gravity of the counterweight moves up. By adjusting the center of gravity position of the counterweight block, it is closer to the sludge surface, greatly reducing the sinking resistance of the counterweight on the sludge surface, so that the counterweight can float steadily on the sludge surface. At this time, the downward displacement detected by the displacement sensor is recorded as L1, so that the difference between L0 and L1 is the thickness of the sludge in the sewage pool; S4: After completing the measurement of L1, the small water pump starts working to introduce the water in the sewage pool into the mud breaker through the water inlet channel and the telescopic water pipe, thereby causing the mud breaker to stretch and deform downward to form a conical penetration structure. In addition, as the length of the mud breaker increases, the center of gravity of the counterweight moves downward. At the same time, the small air pump in the counterweight starts working to force the gas inside the air storage bag and the floating bag to be input into the center of gravity adjustment air bag through the air pipe again, causing the center of gravity adjustment air bag to expand and be in a stretched state, and the floating bag shrinks to the inside of the second storage tank. The floating seat, the center of gravity adjustment air bag and the mud breaker are combined into a cylindrical detector with a lower center of gravity. At the same time, the pointed bottom of the mud breaker is combined to increase the penetration of the sludge, which is convenient for the counterweight to sink smoothly to the bottom of the sewage pool, complete the verification of the sludge thickness, and improve the accuracy of sludge thickness detection; S5: After the inspection is completed, the lifting equipment starts working, and the counterweight is pulled up by the lifting rope to reset it. After the counterweight moves up to the sludge surface, the small air pump starts working to force the gas in the center of gravity adjustment air bag into the air storage bag and the floating bag, causing the four groups of floating bags to expand synchronously, and then extend out of the second storage groove to form an umbrella-shaped floating structure, increasing the buoyancy of the counterweight upward movement. At the same time, the small water pump starts working to discharge the water inside the mud breaker through the water inlet channel. During the process of the floating bag expanding and resetting, the top of the mud breaker is pulled up in the guide channel by the pulling rope, thereby accelerating the storage efficiency of the mud breaker inside the storage seat and facilitating the rapid discharge of the water inside it.

[0017] Technical effects and advantages of the present invention: 1. The present invention adopts a method of hovering on the sludge surface to measure the sludge depth, and the measurement is more accurate. During the downward process of the counterweight, the counterweight changes into an umbrella-shaped floating structure, which increases the buoyancy of the counterweight when it contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the area of ​​contact with the sludge layer, increase the sinking resistance, and thus improve stability and buoyancy. At this time, the center of gravity of the counterweight moves upward, and the center of gravity position of the counterweight block is adjusted upward to make it closer to the sludge surface, which greatly reduces the sinking resistance of the counterweight on the sludge surface, making it easier for the counterweight to float steadily on the sludge surface, and ensuring that the counterweight can hover on the sludge surface to a great extent.

[0018] 2. The present invention introduces sewage into the mud breaker, thereby causing the mud breaker to stretch and deform downward to form a conical penetration structure. In addition, as the length of the mud breaker increases, the center of gravity of the counterweight moves downward, and at the same time, the gas inside the air storage bag and the floating bag is forced to be input into the center of gravity adjustment air bag again through the air duct, causing the center of gravity adjustment air bag to expand and be in a stretched state, and the floating bag shrinks into the second storage groove. The floating seat, the center of gravity adjustment air bag and the mud breaker are combined into a cylindrical detector with a lower center of gravity. At the same time, the pointed bottom of the mud breaker is used to increase the penetration of the sludge, which facilitates the counterweight to sink smoothly to the bottom of the sewage pool, complete the verification of the sludge thickness, and improve the detection accuracy of the sludge thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention in the first use state; Figure 2 This is a schematic diagram of the overall structure of the present invention in the third use state; Figure 3 It is a schematic diagram of a partial cross-section of the overall third use state structure of the present invention from a first viewing angle; Figure 4 It is a schematic diagram of a partial cross-section of the overall third use state structure of the present invention from a second viewing angle; Figure 5 It is a schematic cross-sectional structural diagram of the third use state of the present invention as a whole; Figure 6 It is an exploded schematic diagram of the overall third use state structure of the present invention; Figure 7 This is a schematic diagram of the overall structure of the second use state of the present invention; Figure 8 It is a schematic cross-sectional structural diagram of the second usage state of the entire present invention.

[0020] In the figure: 1. floating seat; 2. lifting ear; 3. lifting rope; 4. center of gravity adjustment air bag; 5. storage seat; 6. mud breaker; 61. flexible unit plate; 62. elastic unit plate; 63. traction seat; 7. air storage bag; 8. floating bag; 9. small air pump; 10. guide channel; 11. fixing pipe; 12. water inlet channel; 13. telescopic water guide pipe; 14. small water pump; 15. pulling rope; 16. guide hole; 17. first storage groove; 18. second storage groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 8 As shown, this embodiment discloses a sludge depth detection device for a sewage sedimentation tank, including a lifting rope 3 and a counterweight connected thereto, and also includes a lifting device, the output end of the lifting device is fixedly connected to the lifting rope 3, and a displacement sensor is embedded in the bottom of the floating seat 1. When in use, the counterweight at the bottom end of the lifting rope 3 is driven downward by the lifting device. When the counterweight reaches the top of the sewage tank, the displacement sensor starts to work. The depth of the sewage tank can be accurately measured when the sewage tank is manufactured, and is recorded as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward movement of the counterweight in real time.

[0023] The counterweight includes a floating seat 1, a center of gravity adjustment air bag 4 is fixedly installed on the bottom outer edge of the floating seat 1, a storage seat 5 is fixedly installed on the bottom of the center of gravity adjustment air bag 4, a mud breaker 6 is stored and installed in the storage seat 5, an air storage bag 7 is installed at the center of the floating seat 1, four groups of floating bags 8 connected to the air storage bag 7 are nested and installed around the floating seat 1, a small air pump 9 is fixedly installed inside the floating seat 1, the input end and output end of the small air pump 9 are respectively connected to the air storage bag 7 and the center of gravity adjustment air bag 4 through an air guide pipe, an air guide channel connected to the first receiving groove 17 is opened at the bottom of the floating seat 1, and the small air pump 9 is fixedly installed in the air guide channel, a first receiving groove 17 matching with the air storage bag 7 is opened inside the floating seat 1, and a second receiving groove 18 connected to the first receiving groove 17 is opened around the floating seat 1, the second receiving groove 18 is fan-shaped, and each group of floating bags 8 is embedded in the second receiving groove 18.

[0024] When the sling 3 starts to move downward with the counterweight, the small air pump 9 in the counterweight works, and the gas inside the air storage bag 7 and the floating bag 8 is forced into the center of gravity adjustment air bag 4 through the air guide tube, so that the center of gravity adjustment air bag 4 expands and is in a stretched state, and the floating bag 8 shrinks into the second storage groove 18. The floating seat 1, the center of gravity adjustment air bag 4 and the mud breaker 6 are combined into a cylindrical detector, which reduces the buoyancy of the counterweight after being immersed in the sewage, making it easier for the counterweight to be immersed in the sewage. At this time, the device is in the first use state, please refer to Figure 1 Even if the center of gravity adjustment air bag 4 is inflated, so that the counterweight has upward buoyancy, the gravity of the counterweight is greater than the buoyancy of the counterweight immersed in water, ensuring the penetration of the counterweight into the sludge during the downward process, making it convenient for the counterweight to dive into the sewage smoothly.

[0025] See also Figure 1-Figure 5 A water inlet channel 12 is provided inside the floating seat 1, and a small water pump 14 is fixedly installed in the water inlet channel 12. A guide channel 10 in the vertical direction is provided in the middle of the center of gravity adjustment air bag 4, and the guide channel 10 and the water inlet channel 12 correspond to each other. A fixed pipe 11 is fixedly connected to the top of the mud breaker 6, and a telescopic water guide pipe 13 is fixedly connected between the fixed pipe 11 and the water inlet channel 12. A receiving groove adapted to the mud breaker 6 is provided at the bottom of the storage seat 5, and the mud breaker 6 is slidably assembled inside the receiving groove, and a hole with the same cross-sectional size as the guide channel 10 is provided in the middle of the top of the storage seat 5, and the water inlet channel 12 extends to the outside of the floating seat 1. The floating seat 1 and the storage seat 5 are circular seats with the same diameter. The outer diameter of the center of gravity adjustment air bag 4 is the same as that of the floating seat 1. A lifting ear 2 is fixed in the middle of the top of the floating seat 1, and the bottom end of the lifting rope 3 is fixedly connected to the lifting ear 2.

[0026] When the counterweight contacts the sludge surface, the mud breaker 6 is stored inside the storage seat 5, and its bottom is an arc-shaped surface, which increases the resistance when the device penetrates the sludge surface. At this time, the small air pump 9 starts to work, and the gas in the center of gravity adjustment air bag 4 is forced into the air storage bag 7 and the floating bag 8, so that the four groups of floating bags 8 expand synchronously, and then extend out of the second storage groove 18 to form an umbrella-shaped floating structure, which increases the buoyancy of the counterweight when it contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the area of ​​contact with the sludge layer, so that the sludge increases the supporting force of the counterweight, thereby improving the stability and buoyancy of the counterweight staying on the sludge surface. Please refer to Figure 7-Figure 8, the device is in the second use state, and at this time, the device drives the counterweight to continue to sink into the sludge surface based on the action of gravity, and the center of gravity adjustment air bag 4 is in a compressed state. At this time, the center of gravity of the counterweight moves up, and the center of gravity position of the counterweight block is adjusted to make it closer to the sludge surface, which greatly reduces the sinking resistance of the counterweight on the sludge surface, making it easier for the counterweight to float steadily on the sludge surface. At this time, the downward movement detected by the displacement sensor is recorded as L1, that is, the distance between the top of the sewage pool and the sludge surface. In this way, the difference between L0 and L1 is the thickness of the sludge in the sewage pool.

[0027] It is worth mentioning that please refer to Figure 2-Figure 6 The mud breaker 6 includes six groups of conical flexible unit plates 61 with the same structure. The bottom ends of the six groups of conical flexible unit plates 61 are integrally formed and connected together, and the top ends of the six groups of conical flexible unit plates 61 extend along the inner wall of the accommodating groove into the guide channel 10 and are integrally formed and connected together to form a traction seat 63, and an elastic unit plate 62 is connected between two adjacent groups of conical flexible unit plates 61. Multiple groups of conical flexible unit plates 61 and elastic unit plates 62 form a mud breaking cone. Pulling ropes 15 are fixed around the top of the traction seat 63, and four groups of pulling ropes 15 correspond to four groups of floating bags 8 one by one. The top ends of the four groups of pulling ropes 15 pass upward through the guide channel 10 and the floating seat 1 and are fixedly connected to the outer side of the bottom of the corresponding floating bag 8. A guide hole 16 for accommodating the pulling rope 15 is opened at a position corresponding to the floating bag 8 inside the floating seat 1.

[0028] After completing the measurement of L1, the small water pump 14 starts working to introduce the water in the sewage pool into the mud breaker 6 through the water inlet channel 12 and the telescopic water pipe 13. After the sewage is introduced into the mud breaker 6, the overall mass increases, thereby causing the mud breaker 6 to stretch and deform downward, and then the flexible unit plate 61 is pulled downward under the gravity of the water body, and the elastic unit plate 62 can provide deformation space when the flexible unit plate 61 moves downward and deforms, ensuring the sealing, thereby forming a pointed and conical penetration structure, and the length of the mud breaker 6 increases, the center of gravity of the counterweight moves downward, and at the same time the small air pump 9 in the counterweight works to force the gas inside the air storage bag 7 and the floating bag 8 to be input into the center of gravity adjustment air bag 4 again through the air pipe, causing the center of gravity adjustment air bag 4 to expand and be in a stretched state, and the floating bag 8 shrinks to the inside of the second storage groove 18, the floating seat 1, the center of gravity adjustment air bag 4 and the mud breaker 6 are combined into a cylindrical detector with a lower center of gravity, please refer to Figure 2-Figure 6 At this time, the device is in the third use state. The cylindrical detector cooperates with the pointed bottom of the mud breaker 6 to increase the penetration of the sludge, making it easier for the counterweight to sink to the bottom of the sewage pool, completing the verification of the sludge thickness and improving the detection accuracy of the sludge thickness.

[0029] It should be noted that after the center of gravity adjustment air bag 4 is inflated, its length is fixed, recorded as d1, and when the length of the mud breaker 6 increases due to the introduction of sewage, its length is fixed, recorded as d2. Therefore, when the mud breaker 6 sinks to the bottom of the sewage pool, the secondary downward movement detected by the displacement sensor is recorded as L2. In this way, after the counterweight moves from the sludge surface to the bottom of the sewage pool, the sum of L2, d1, and d2 is the depth of the sludge in the sewage pool. The actual measured sludge depth is compared with the difference between L0 and L1. The error between the two is within the standard range, which proves that the sludge depth measured by this method is highly accurate and can accurately measure the sludge depth value in the sewage pool. At the same time, secondary measurement is used for verification, so as to minimize the impact of external factors during each measurement and improve accuracy.

[0030] This embodiment discloses a method for detecting the depth of sludge in a sewage sedimentation tank. The steps of the detection method are as follows: S1: The counterweight at the bottom of the lifting rope 3 is driven downward by the lifting equipment. When the counterweight reaches the top of the sewage pool, the displacement sensor starts to work. The depth value of the sewage pool is recorded as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward movement of the counterweight in real time; S2: Before the counterweight comes into contact with the sludge surface, the small air pump 9 in the counterweight works to force the gas inside the air storage bag 7 and the floating bag 8 into the center of gravity adjustment air bag 4 through the air guide tube, causing the center of gravity adjustment air bag 4 to expand and be in a stretched state, and the floating bag 8 shrinks inside the second storage groove 18. The floating seat 1, the center of gravity adjustment air bag 4 and the mud breaker 6 are combined into a cylindrical detector, which reduces the buoyancy of the counterweight after it is immersed in the sewage, making it easier for the counterweight to be immersed in the sewage, and the gravity of the counterweight is greater than the buoyancy of the counterweight immersed in the water, ensuring the penetration of the counterweight into the sludge during the downward process; S3: When the counterweight contacts the sludge surface, since the mud breaker 6 is stored inside the storage seat 5, its bottom is an arc-shaped surface at this time, which increases the resistance to sinking into the sludge when penetrating the sludge surface, driving the counterweight to continue to move downward. At this time, the small air pump 9 works to force the gas in the center of gravity adjustment air bag 4 into the air storage bag 7 and the floating bag 8, prompting the four groups of floating bags 8 to expand synchronously, and then extend outward from the second storage groove 18 to form an umbrella-shaped floating structure, increasing the buoyancy of the counterweight when it contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge, increases the sinking resistance, thereby improving stability and buoyancy. At this time, the center of gravity adjustment air bag 4 is in a compressed state. At this time, the center of gravity of the counterweight moves up, and by adjusting the center of gravity position of the counterweight block, it is closer to the sludge surface, which greatly increases the sinking resistance of the counterweight on the sludge surface, so that the counterweight can float steadily on the sludge surface. At this time, the downward displacement detected by the displacement sensor is recorded as L1, so that the difference between L0 and L1 is the thickness of the sludge in the sewage pool; S4: After completing the measurement of L1, the small water pump 14 starts working to introduce the water in the sewage pool into the mud breaker 6 through the water inlet channel 12 and the telescopic water pipe 13, thereby causing the mud breaker 6 to stretch and deform downward to form a conical penetration structure. In addition, the length of the mud breaker 6 increases, and the center of gravity of the counterweight moves downward. At the same time, the small air pump 9 in the counterweight starts working to force the gas inside the air storage bag 7 and the floating bag 8 to be input into the center of gravity adjustment air bag 4 through the air pipe again, causing the center of gravity adjustment air bag 4 to expand and be in a stretched state, and the floating bag 8 shrinks to the inside of the second storage groove 18. The floating seat 1, the center of gravity adjustment air bag 4 and the mud breaker 6 are combined into a cylindrical detector with a lower center of gravity. At the same time, the pointed bottom of the mud breaker 6 is used to increase the penetration of the sludge, which is convenient for the counterweight to sink smoothly to the bottom of the sewage pool, complete the verification of the sludge thickness, and improve the detection accuracy of the sludge thickness. S5: After the inspection is completed, the lifting equipment starts working, and the counterweight is pulled up by the lifting rope 3 to reset it. After the counterweight moves up to the sludge surface, the small air pump 9 starts working, and the gas in the center of gravity adjustment air bag 4 is forced into the air storage bag 7 and the floating bag 8, so that the four groups of floating bags 8 expand synchronously, and then extend outward from the second storage groove 18 to form an umbrella-shaped floating structure, which increases the buoyancy of the counterweight upward movement. At the same time, the small water pump 14 starts working to discharge the water inside the mud breaker 6 through the water inlet channel 12. In the process of the floating bag 8 expanding and resetting, the top of the mud breaker 6 is pulled up in the guide channel 10 by the pulling rope 15, thereby accelerating the storage efficiency of the mud breaker 6 inside the storage seat 5, and facilitating the rapid discharge of the water inside it, so as to facilitate the device to carry out the next sludge depth measurement work.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage sedimentation tank sludge depth detection device, characterized in that: The invention comprises a suspension rope (3) and a counterweight connected thereto, wherein the counterweight comprises a floating seat (1), a gravity center adjustment air bag (4) is fixedly installed on the outer edge of the bottom of the floating seat (1), a storage seat (5) is fixedly installed on the bottom of the gravity center adjustment air bag (4), a mud breaker (6) is stored and installed in the storage seat (5), an air storage bag (7) is installed at the center of the interior of the floating seat (1), floating bags (8) connected to four groups of air storage bags (7) are nested and installed around the floating seat (1), and a small air pump (9) is fixedly installed inside the floating seat (1), and the input end and output end of the small air pump (9) are respectively connected to the air storage bag (7) and the gravity center adjustment air bag (4) through an air guide pipe.

2. The sludge depth detection device for a sewage sedimentation tank according to claim 1 is characterized in that: A water inlet channel (12) is provided inside the floating seat (1), a small water pump (14) is fixedly installed inside the water inlet channel (12), a guide channel (10) in the vertical direction is provided in the middle of the center of gravity adjustment air bag (4), and the guide channel (10) and the water inlet channel (12) are directly corresponding to each other, a fixed pipe (11) is fixedly connected to the top of the mud breaker (6), and a telescopic water guide pipe (13) is fixedly connected between the fixed pipe (11) and the water inlet channel (12).

3. The sludge depth detection device for a sewage sedimentation tank according to claim 2 is characterized in that: The bottom of the storage seat (5) is provided with a receiving groove adapted to the mud breaker (6), and the mud breaker (6) is slidably assembled inside the receiving groove, and a hole with the same cross-sectional size as the guide channel (10) is provided in the middle of the top of the storage seat (5).

4. The sludge depth detection device for a sewage sedimentation tank according to claim 3 is characterized in that: The mud breaker (6) comprises six groups of conical flexible unit plates (61) of the same structure, the bottom ends of the six groups of conical flexible unit plates (61) are integrally formed and connected together, and the top ends of the six groups of conical flexible unit plates (61) extend along the inner wall of the accommodating groove into the guide channel (10) and are integrally formed and connected together to form a traction seat (63), and an elastic unit plate (62) is connected between two adjacent groups of conical flexible unit plates (61), and multiple groups of conical flexible unit plates (61) and elastic unit plates (62) form a mud breaker cone.

5. The sewage sedimentation tank sludge depth detection device according to claim 4 is characterized in that: Four groups of pulling ropes (15) are fixed around the top of the traction seat (63), and the four groups of pulling ropes (15) correspond to the four groups of floating bags (8) one by one. The top ends of the four groups of pulling ropes (15) pass upward through the guide channel (10) and the floating seat (1) and are fixedly connected to the outer sides of the bottoms of the corresponding floating bags (8).

6. The sludge depth detection device for a sewage sedimentation tank according to claim 5, characterized in that: The floating seat (1) is provided with a first receiving groove (17) matching with the air storage bag (7), and the floating seat (1) is provided with a second receiving groove (18) connected with the first receiving groove (17) around the periphery, the second receiving groove (18) is fan-shaped, and each group of floating bags (8) is embedded in the second receiving groove (18), and a guide hole (16) for accommodating a pulling rope (15) is provided at a position corresponding to the floating bags (8) inside the floating seat (1).

7. The sludge depth detection device for a sewage sedimentation tank according to claim 6, characterized in that: An air guide channel communicating with the first receiving groove (17) is provided at the bottom of the floating seat (1), and the small air pump (9) is fixedly installed in the air guide channel.

8. The sewage sedimentation tank sludge depth detection device according to claim 7, characterized in that: The water inlet channel (12) extends to the outside of the floating seat (1); the floating seat (1) and the storage seat (5) are circular seats with the same diameter; the outer diameter of the center of gravity adjustment air bag (4) is the same as that of the floating seat (1); a lifting ear (2) is fixed in the middle of the top of the floating seat (1), and the bottom end of the lifting rope (3) is fixedly connected to the lifting ear (2).

9. The sewage sedimentation tank sludge depth detection device according to claim 8, characterized in that: It also comprises a lifting device, the output end of the lifting device is fixedly connected to the lifting rope (3), and a displacement sensor is embedded in the bottom of the floating seat (1).

10. A method for detecting the sludge depth of a sewage sedimentation tank, implemented by using the device for detecting the sludge depth of a sewage sedimentation tank as claimed in claim 9, characterized in that: The steps of the detection method are: S1: The counterweight at the bottom of the lifting rope (3) is driven downward by the lifting equipment. When the counterweight reaches the top of the sewage pool, the displacement sensor starts to work. The depth value of the sewage pool is recorded as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward movement of the counterweight in real time; S2: Before the counterweight contacts the sludge surface, the small air pump (9) in the counterweight works to force the gas in the air storage bag (7) and the floating bag (8) into the center of gravity adjustment air bag (4) through the air guide tube, causing the center of gravity adjustment air bag (4) to expand and be in a stretched state, and the floating bag (8) to retract into the second storage groove (18). The floating seat (1), the center of gravity adjustment air bag (4) and the mud breaker (6) are combined into a cylindrical detector, which reduces the buoyancy of the counterweight after it is immersed in sewage, making it easier for the counterweight to be immersed in sewage, and the gravity of the counterweight is greater than the buoyancy of the counterweight immersed in water, ensuring the penetrability of the counterweight into the sludge during the downward process; S3: When the counterweight contacts the sludge surface, since the mud breaker (6) is stored inside the storage seat (5), its bottom is an arc-shaped surface, which increases the resistance of sinking into the sludge when penetrating the sludge surface, driving the counterweight to continue to move downward. At this time, the small air pump (9) works to force the gas in the center of gravity adjustment air bag (4) into the air storage bag (7) and the floating bag (8), causing the four groups of floating bags (8) to expand synchronously, and then extend outward from the second storage groove (18) to form an umbrella-shaped floating structure. At this time, the center of gravity adjustment air bag (4) is in a compressed state. At this time, the center of gravity of the counterweight moves upward. By adjusting the center of gravity position of the counterweight block, it is closer to the sludge surface, so that the counterweight can float steadily on the sludge surface. At this time, the downward displacement detected by the displacement sensor is recorded as L1, so that the difference between L0 and L1 is the thickness of the sludge in the sewage pool; S4: After the measurement of L1 is completed, the small water pump (14) starts to work, and the water in the sewage pool is introduced into the mud breaker (6) through the water inlet channel (12) and the telescopic water pipe (13), so that the mud breaker (6) is stretched and deformed downward to form a conical penetration structure. In addition, the length of the mud breaker (6) increases, and the center of gravity of the counterweight moves downward. At the same time, the small air pump (9) in the counterweight starts to work, and the gas in the air storage bag (7) and the floating bag (8) is forced to be input into the air pipe again. In the gravity adjustment air bag (4), the gravity adjustment air bag (4) is expanded and in a stretched state, and the floating bag (8) is retracted into the second storage groove (18). The floating seat (1), the gravity adjustment air bag (4) and the mud breaker (6) are combined into a cylindrical detector with a lower gravity center. At the same time, the pointed bottom of the mud breaker (6) is used to increase the penetration of the mud, so that the counterweight can be smoothly sunk to the bottom of the sewage pool, thereby completing the verification of the mud thickness and improving the detection accuracy of the mud thickness. S5: After the detection is completed, the lifting equipment starts working, and the counterweight is pulled up by the lifting rope (3) to reset. After the counterweight moves up to the sludge surface, the small air pump (9) starts working to force the gas in the center of gravity adjustment air bag (4) into the air storage bag (7) and the floating bag (8), so that the four groups of floating bags (8) expand synchronously, and then extend outward from the second storage groove (18) to form an umbrella-shaped floating structure, thereby increasing the buoyancy of the counterweight moving upward. At the same time, the small water pump (14) starts working to discharge the water inside the mud breaker (6) through the water inlet channel (12). During the process of the floating bag (8) expanding and resetting, the top end of the mud breaker (6) is pulled up in the guide channel (10) by the pulling rope (15), thereby accelerating the storage efficiency of the mud breaker (6) inside the storage seat (5) and facilitating the rapid discharge of the water inside it.

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