Sewage sedimentation tank sludge depth detection device and its detection method

Abstract

The present invention relates to the technical field of in-depth sludge detection, and discloses a sewage sedimentation tank sludge depth detection device and its detection method. The counterweight includes a floating seat. A center-of-gravity adjustment airbag is fixedly installed on the outer edge of the bottom of the floating seat. A storage seat is fixedly assembled at the bottom of the center-of-gravity adjustment airbag. 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 bladders communicated with four groups of air storage bags are nested and installed around the floating seat. A small air pump is fixedly installed inside the floating seat. The input end and the output end of the small air pump are respectively connected to the air storage bag and the center-of-gravity adjustment airbag through air ducts. The method of hovering on the sludge surface is adopted to measure the sludge depth, and the measurement is more accurate. The sinking resistance of the counterweight on the sludge surface is greatly reduced, which facilitates the counterweight to float stably on the sludge surface, and greatly ensures that the counterweight can hover on the sludge surface.

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 pressured by the upper sludge layer, causing water to be squeezed out. The sludge becomes more compacted and dense, so it is inevitable to form a hard crust layer. During the downward movement of the counterweight in the sedimentation tank, when the density of the sludge increases after sedimentation and a hard crust area appears, it will seriously hinder the downward movement of the counterweight, which will affect the sinking action of the counterweight and cause the counterweight to stagnate and false bottoming to occur. This directly leads to inaccurate thickness measurement. Moreover, the newly deposited sludge contains more water and smaller solid particles, and the density of the sludge layer is very small. When the counterweight touches the upper layer of the sludge layer, it will directly insert into the sludge layer. When using the counterweight to detect the height of the top of the sludge layer, it will cause detection errors because the counterweight directly sinks into the sludge layer, resulting in a lower value of the sludge layer thickness and affecting the detection accuracy.

[0005] Therefore, the present invention proposes a sewage sedimentation tank sludge depth detection device and its detection method to solve the above problems. Summary of the Invention

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

[0007] To achieve the above purpose, the present invention provides the following technical solution: A sewage sedimentation tank sludge depth detection device includes a suspension rope and a counterweight connected thereto. The counterweight includes a floating seat. A gravity adjustment airbag is fixedly installed on the outer edge of the bottom of the floating seat. A receiving seat is fixedly assembled at the bottom of the gravity adjustment airbag. A mud breaker is received and installed in the receiving seat. An air storage bag is installed at the center of the floating seat. Four floating bladders communicated with the four air storage bags are nested and installed around the floating seat. A small air pump is fixedly installed inside the floating seat. The input end and the output end of the small air pump are respectively connected to the air storage bag and the gravity adjustment airbag through air ducts.

[0008] Preferably, a water inlet channel is opened inside the floating seat. A small water pump is fixedly assembled in the water inlet channel. A vertical guiding channel is provided in the middle of the gravity adjustment airbag, and the guiding channel corresponds exactly to the water inlet channel. A fixing pipe is fixedly connected to the top of the mud breaker. A telescopic water guide pipe is fixedly connected between the fixing pipe and the water inlet channel.

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

[0010] Preferably, the mud breaker includes six sets of conical flexible unit plates with the same structure. The bottoms of the six sets of conical flexible unit plates are integrally formed and connected together, and the tops of the six sets of conical flexible unit plates extend along the inner wall of the receiving groove into the guiding channel and are integrally formed and connected together to form a traction seat. An elastic unit plate is connected between adjacent two sets of conical flexible unit plates. The multiple sets 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 pulling ropes correspond to the four floating bags one by one. The tops of the four pulling ropes pass upward through the guiding channel and the floating seat and are fixedly connected to the outer sides of the bottoms of the corresponding floating bags.

[0012] Preferably, a first receiving groove matching the air storage bag is formed inside the floating seat. Second receiving grooves communicating with the first receiving groove are formed around the floating seat. The second receiving grooves are fan-shaped, and each floating bag is embedded in the second receiving groove. A guiding hole for receiving the pulling rope is formed at a position inside the floating seat corresponding to the floating bag.

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

[0014] Preferably, the water inlet channel extends to the outside of the floating seat. The floating seat and the receiving seat are circular seats with the same diameter. The outer diameter of the gravity adjustment air bag is the same as that of the floating seat. A lifting lug 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 lug.

[0015] Preferably, it further includes a hoisting device. The output end of the hoisting device is fixedly connected to the lifting rope, and a displacement sensor is embedded and assembled at the bottom of the floating seat.

[0016] A method for detecting the sludge depth in a sewage sedimentation tank. The steps of the detection method are as follows:

[0017] S1: Drive the counterweight at the bottom end of the lifting rope to move downward through the hoisting device. When the counterweight reaches the top of the sewage tank, the displacement sensor starts to work. The depth value of the sewage tank is recorded as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward displacement of the counterweight in real time;

[0018] S2: Before the counterweight touches the sludge surface, the small air pump in the counterweight operates to force the gas inside the air storage bag and the floating bladder into the center-of-gravity adjustment air bag through the air duct, causing the center-of-gravity adjustment air bag to expand and be in a stretched state, and the floating bladder to contract into the second storage groove. The floating seat, the center-of-gravity adjustment air bag, and the sludge breaker form a cylindrical detector, reducing the buoyancy of the counterweight after it is immersed in the sewage, facilitating the counterweight to be more easily immersed in the sewage, and the gravity of the counterweight being greater than the buoyancy of the counterweight immersed in the water to ensure the penetrability of the counterweight to the sludge during the downward movement;

[0019] S3: When the counterweight touches the sludge surface, since the sludge breaker is stored inside the storage seat and its bottom is an arc surface at this time, the resistance to sinking into the sludge is increased when penetrating the sludge surface, driving the counterweight to continue to move downward. At this time, the small air pump operates to force the gas in the center-of-gravity adjustment air bag into the air storage bag and the floating bladder, causing the four floating bladders 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 touches the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the contact area with the sludge layer and increase the sinking resistance, thereby improving the stability and buoyancy. And at this time, the center-of-gravity adjustment air bag is in a compressed state, and the center of gravity of the counterweight moves upward. By adjusting the center-of-gravity position of the upper counterweight block, it is closer to the sludge surface, greatly reducing the sinking resistance of the counterweight on the sludge surface and facilitating the counterweight to float steadily on the sludge surface. The downward displacement detected by the displacement sensor at this time is recorded as L1. The difference between L0 and L1 is the thickness of the sludge in the sewage tank;

[0020] S4: After measuring L1, the small water pump operates to introduce the water in the sewage tank into the sludge breaker through the water inlet channel and the telescopic air duct, causing the sludge breaker to stretch downward and deform into a conical penetration structure. Moreover, as the length of the sludge breaker increases, the center of gravity of the counterweight moves downward. At the same time, the small air pump in the counterweight operates to force the gas inside the air storage bag and the floating bladder into the center-of-gravity adjustment air bag through the air duct again, causing the center-of-gravity adjustment air bag to expand and be in a stretched state, and the floating bladder to contract into the second storage groove. The floating seat, the center-of-gravity adjustment air bag, and the sludge breaker form a cylindrical detector with a lower center of gravity. At the same time, combined with the pointed bottom of the sludge breaker, the penetrability of the sludge is increased, facilitating the counterweight to sink smoothly to the bottom of the sewage tank, completing the verification of the sludge thickness, and improving the detection accuracy of the sludge thickness;

[0021] S5: After the detection is completed, the lifting equipment works to pull up the counterweight through the lifting rope for resetting. After the counterweight moves up to the sludge surface, the small air pump works to force the gas in the center-of-gravity adjustment airbag into the air storage bag and the floating bags, prompting 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 for the upward movement of the counterweight. At the same time, the small water pump works to discharge the water inside the sludge breaker through the water inlet channel. During the process of the floating bags expanding and resetting, the top of the sludge breaker is pulled by the pulling rope to move upward in the guiding channel, thereby accelerating the storage efficiency of the sludge breaker inside the storage seat and facilitating the rapid discharge of the water inside it.

[0022] The technical effects and advantages of the present invention:

[0023] 1. The present invention measures the sludge depth by hovering on the sludge surface, and the measurement is more accurate. During the downward movement of the counterweight, the counterweight changes into an umbrella-shaped floating structure, increasing the buoyancy when the counterweight contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the area of the sludge contact layer, increasing the sinking resistance, thereby improving the stability and buoyancy. And 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, greatly reducing the sinking resistance of the counterweight on the sludge surface and facilitating the counterweight to float steadily on the sludge surface, ensuring to a great extent that the counterweight can hover on the sludge surface.

[0024] 2. The present invention introduces sewage into the sludge breaker, prompting the sludge breaker to stretch downward and deform to form a conical penetration structure. Moreover, as the length of the sludge breaker increases, the center of gravity of the counterweight moves downward. At the same time, the gas inside the air storage bag and the floating bags is forced into the center-of-gravity adjustment airbag again through the air duct, prompting the center-of-gravity adjustment airbag to expand and be in a stretched state, and the floating bags shrink into the second storage groove. The floating seat, the center-of-gravity adjustment airbag, and the sludge breaker form a cylindrical detector with a lower center of gravity. At the same time, combined with the pointed bottom of the sludge breaker, it increases the penetration force of the sludge, facilitating the counterweight to sink smoothly to the bottom of the sewage tank to complete the verification of the sludge thickness and improving the detection accuracy of the sludge thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall first use state structure of the present invention;

[0026] Figure 2 is a schematic diagram of the overall third use state structure of the present invention;

[0027] Figure 3 is a schematic diagram of the first perspective of the partial cross-section of the overall third use state structure of the present invention;

[0028] Figure 4 is a schematic diagram of the second perspective of the partial cross-section of the overall third use state structure of the present invention;

[0029] Figure 5 This is the schematic cross-sectional structure diagram of the third usage state of the whole invention;

[0030] Figure 6 This is the exploded structure diagram of the third usage state of the whole invention;

[0031] Figure 7 This is the schematic structure diagram of the second usage state of the whole invention;

[0032] Figure 8 This is the schematic cross-sectional structure diagram of the second usage state of the whole invention.

[0033] In the figure: 1. Floating seat; 2. Lifting lug; 3. Suspension 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. Gas storage bag; 8. Floating bladder; 9. Small air pump; 10. Guide channel; 11. Fixed 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 implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figures 1 to 8 shown, this embodiment discloses a device for deep detection of sludge in a sewage sedimentation tank, which includes a suspension rope 3 and a counterweight connected thereto, and further includes a hoisting device. The output end of the hoisting device is fixedly connected to the suspension rope 3. A displacement sensor is embedded and assembled at the bottom of the floating seat 1. During use, the counterweight at the bottom end of the suspension rope 3 is driven to move down by the hoisting device. When the counterweight reaches the top of the sewage tank, the displacement sensor starts to work, and the depth of the sewage tank can be accurately measured during the manufacture of the sewage tank, denoted as L0. As the counterweight moves down, the displacement sensor starts to detect the downward displacement amount of the counterweight in real time.

[0036] 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.

[0037] 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.

[0038] See also Figures 1 - 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.

[0039] When the counterweight contacts the sludge surface, since the sludge breaker 6 is received inside the receiving seat 5 and its bottom is an arc surface at this time, the resistance is increased 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 airbag 4 is forced into the gas storage bag 7 and the floating bladder 8, prompting the four groups of floating bladders 8 to expand synchronously, and then extending out of the second receiving groove 18 to form an umbrella-shaped floating structure, increasing the buoyancy when the counterweight contacts the sludge. At the same time, the umbrella-shaped floating structure increases the contact area with the sludge to maximize the area of the contact sludge layer, increasing the supporting force of the sludge on the counterweight, thereby improving the stability and buoyancy of the counterweight staying on the sludge surface. Please refer to Figures 7 - 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 under the action of gravity, and the center-of-gravity adjustment airbag 4 is in a compressed state. At this time, the center of gravity of the counterweight moves upward, and by adjusting the center-of-gravity position of the upper counterweight block, it is closer to the sludge surface, greatly reducing the sinking resistance of the counterweight on the sludge surface, facilitating the counterweight to float steadily on the sludge surface. At this time, the downward displacement detected by the displacement sensor is recorded as L1, that is, the distance between the top of the sewage tank and the sludge surface. Then the difference between L0 and L1 is the thickness of the sludge in the sewage tank.

[0040] It should be noted that, please refer to Figures 2 - 6 , the sludge breaker 6 includes six identical conical flexible unit plates 61. The bottoms of the six conical flexible unit plates 61 are integrally formed and connected together, and the tops of the six conical flexible unit plates 61 extend along the inner wall of the receiving groove into the guiding channel 10 and are integrally formed and connected together to form a traction seat 63. An elastic unit plate 62 is connected between adjacent two conical flexible unit plates 61. The multiple conical flexible unit plates 61 and the elastic unit plate 62 form a sludge-breaking cone. Pulling ropes 15 are fixed around the top of the traction seat 63, and the four pulling ropes 15 correspond to the four floating bladders 8 one by one. The tops of the four pulling ropes 15 pass upward through the guiding channel 10 and are fixedly connected to the bottom outside of the corresponding floating bladder 8 through the floating seat 1. A guiding hole 16 for receiving the pulling rope 15 is provided at the position corresponding to the floating bladder 8 inside the floating seat 1.

[0041] After the measurement of L1 is completed, the small water pump 14 works to introduce the water in the sewage tank into the inside of the mud breaker 6 through the water inlet channel 12 and the telescopic water guide pipe 13. After the sewage is introduced into the mud breaker 6, the overall mass increases, which prompts the mud breaker 6 to stretch and deform downward. Subsequently, the flexible unit plate 61 is pulled downward under the action of the gravity of the water body, and the elastic unit plate 62 can provide a deformation space when the flexible unit plate 61 moves and deforms, ensuring the sealing performance, and then forming a pointed and conical penetration structure. Moreover, as the length of the mud breaker 6 increases, the center of gravity of the counterweight moves downward. At the same time, the small air pump 9 in the counterweight works to forcibly input the gas in the gas storage bag 7 and the floating bladder 8 into the center-of-gravity adjustment air bag 4 again through the air guide pipe, prompting the center-of-gravity adjustment air bag 4 to expand and be in a stretched state, and the floating bladder 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 with a lower center of gravity. Please refer to Figures 2 - 6 , at this time, the device is in the third usage state. The cylindrical detector cooperates with the pointed bottom of the mud breaker 6 to increase the penetration force of the sludge, facilitating the smooth sinking of the counterweight to the bottom of the sewage tank, completing the verification of the sludge thickness, and improving the detection accuracy of the sludge thickness.

[0042] It should be noted that after the center-of-gravity adjustment air bag 4 expands, its length is fixed, denoted as d1, and when the sewage is introduced into the mud breaker 6 and its length increases, its length is fixed, denoted as d2. Therefore, when the mud breaker 6 sinks to the bottom of the sewage tank, the secondary downward displacement measured by the displacement sensor at this time is denoted as L2. In this way, after the counterweight moves from the sludge surface to the bottom of the sewage tank, the sum of L2, d1, and d2 is the depth of the sludge in the sewage tank. Comparing the actually measured sludge depth with the difference between L0 and L1, if the error between the two is within the standard range, it can prove that the sludge depth measured by this method has high accuracy and can accurately measure the sludge depth value in the sewage tank. At the same time, the secondary measurement method is used for verification to maximize the reduction of the influence of external factors during each measurement and improve the accuracy.

[0043] This embodiment discloses a method for detecting the sludge depth in a sewage sedimentation tank. The steps of the detection method are as follows:

[0044] S1: Drive the counterweight at the bottom of the lifting rope 3 to move downward through the lifting equipment. When the counterweight reaches the top of the sewage tank, the displacement sensor starts to work. The depth value of the sewage tank is denoted as L0. As the counterweight moves downward, the displacement sensor starts to detect the downward displacement of the counterweight in real time;

[0045] 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;

[0046] 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;

[0047] 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.

[0048] S5: After the detection is completed, the hoisting equipment works to pull up the counterweight through the lifting rope 3 for resetting. After the counterweight moves up to the sludge surface, the small air pump 9 works to forcibly introduce the gas in the center-of-gravity adjustment airbag 4 into the gas storage bag 7 and the floating bladder 8, prompting the four groups of floating bladders 8 to expand synchronously, and then extending out of the second storage groove 18 to form an umbrella-shaped floating structure, increasing the buoyancy for the upward movement of the counterweight. At the same time, the small water pump 14 works to discharge the water inside the mud breaker 6 through the water inlet channel 12. During the process of the floating bladder 8 expanding and resetting, the top of the mud breaker 6 is pulled up in the guiding channel 10 through 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.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

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

2. The sludge depth detection device for a sewage sedimentation tank according to claim 1 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).

3. The sludge depth detection device for a sewage sedimentation tank according to claim 2 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.

4. The sludge depth detection device for a sewage sedimentation tank according to claim 3 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).

5. The sewage sedimentation tank sludge depth detection device according to claim 4 is 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).

6. The sludge depth detection device for a sewage sedimentation tank according to claim 5, 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.

7. The sewage sedimentation tank sludge depth detection device according to claim 6, 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).

8. A method for detecting the sludge depth of a sewage sedimentation tank, implemented by using the sludge depth detection device for a sewage sedimentation tank as claimed in claim 7, 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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