Flocculating agent adding device for industrial sewage treatment
By designing the monitoring structure of airbags, partitions and meters in the flocculant addition device for industrial sewage treatment, the amount of flocculant added is monitored in real time, the problem of insufficient flocculant addition is solved, and the sewage treatment effect and the compliance rate of effluent water quality are improved.
Patent Information
- Application Number
- CN202423167324.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The existing industrial wastewater treatment flocculant addition device fails to monitor the amount of flocculant addition in real time and accurately, resulting in insufficient flocculant addition, affecting the sewage precipitation and filtration effect, and thus affecting the compliance of the effluent water quality.
A monitoring structure including airbag, partition and meter is designed. The partition is pushed to squeeze the airbag through the flocculant, allowing gas to enter the meter, and reflect the amount of flocculant added in real time.
Real-time monitoring of the amount of flocculant added is achieved, the accuracy of the amount is improved, the impurities such as suspended matter in the sewage are fully flocculated, the precipitation and filtration effect is improved, and the stability and compliance rate of the effluent water quality are ensured.
Smart Images

Figure CN222540585U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to a flocculant adding device for industrial sewage treatment. Background Art
[0002] The flocculant adding device for industrial wastewater treatment is a device used to assist wastewater treatment. It mainly adds flocculants to wastewater to cause impurities in the wastewater to form flocs for subsequent sedimentation, filtration and other treatments, thereby achieving the purpose of purifying wastewater.
[0003] A Chinese patent discloses a flocculant adding device (Announcement No. CN217051737U), which includes a housing, a baffle assembly, a water pump, an agitator and a controller. The housing includes a solvent tank and a medium tank, and the solvent tank and the medium tank are respectively provided with an inlet and an outlet, and the solvent tank and the medium tank are respectively provided with a water supply pipe and a drain pipe; the baffle assembly is movably connected in the medium tank to cover or expose the outlet; the water pump is arranged on the housing, and the water pump includes a water inlet end and a water outlet end, and the water inlet end and the water outlet end are respectively connected to the water supply pipe and the drain pipe; the agitator includes a stirring assembly and a first driving unit, and the first driving unit is arranged on the side wall of the medium tank away from the solvent tank, one end of the stirring assembly is connected to the first driving unit, and the other end of the stirring assembly extends to one side of the solvent tank; the water pump and / or the agitator are electrically connected to the controller, and the controller can control the start and stop of the water pump and / or the agitator;
[0004] Therefore, based on the above search and in combination with the existing ones, in the flocculant addition device for industrial wastewater treatment, the control of the amount of flocculant added plays a key role in the effectiveness of the entire wastewater treatment process and the compliance of the final effluent water quality. However, the patent does not have a structure that can monitor the amount of flocculant added in real time and accurately. If the amount of flocculant added is insufficient during the actual operation, impurities such as suspended matter in the wastewater may not be fully flocculated, affecting the subsequent sedimentation and filtration effects, resulting in the final effluent water quality not meeting the standards. Utility Model Content
[0005] The purpose of the utility model is to provide a flocculant adding device for industrial sewage treatment to solve the problems raised in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A flocculant adding device for industrial sewage treatment comprises a sewage treatment box, a storage box for storing flocculants is fixedly installed on the top surface of the sewage treatment box, a distribution box is installed on one side of the storage box, a monitoring structure for monitoring the amount of flocculants added is slidably installed in the inner cavity of the distribution box, an injection pipe for injecting sewage is installed on the side of the distribution box away from the storage box, a discharge pipe for discharging sewage is fixedly installed on one side of the sewage treatment box, and a stirring structure for accelerating the combination of sewage and flocculants is rotatably installed in the inner cavity of the sewage treatment box;
[0008] The monitoring structure includes an airbag, one side of which is fixedly connected to the inner wall of a distribution box, and a partition for squeezing the airbag to shrink is fixedly installed on the other side of the airbag, a meter for real-time display of the amount of flocculant added is fixedly installed on the outer wall of the distribution box, and the airbag is connected to the meter through an air pipe. The flocculant injected into the distribution box pushes the partition to move, so that the partition squeezes the airbag and the gas inside the airbag enters the meter, thereby reflecting the amount of flocculant added in real time.
[0009] As a further solution of the utility model, a telescopic rod is fixedly installed in the inner cavity of the airbag, and a force storage spring for providing reset power is fixedly installed in the inner cavity of the telescopic rod.
[0010] As a further solution of the utility model, a water inlet pipe for preliminary mixing of sewage and flocculant is fixedly installed on one side of the distribution box, and a drain pipe for discharging sewage and flocculant is fixedly installed on the bottom end of the distribution box. One side of the water inlet pipe and the drain pipe are fixedly connected to the injection pipe, and the inner cavities of the water inlet pipe and the drain pipe are rotatably installed with a control structure for controlling the internal flow state of the distribution box.
[0011] As a further solution of the utility model, the control structure includes a sealing plug, which is slidably located in the inner cavity of the water inlet pipe, and a connecting frame is fixedly installed on one side of the sealing plug, and the material of the connecting frame is set to stainless steel, and the end of the connecting frame away from the sealing plug is magnetically connected to a magnetic ring for fixing the sealing plug, and the magnetic ring is fixedly connected to the inner wall of the water inlet pipe.
[0012] As a further solution of the utility model, the control structure also includes a sealing plate, which is rotatably installed in the inner cavity of the drain pipe through a pin shaft, and a rotating frame for driving the sealing plate to flip is fixedly installed at the bottom end of the sealing plate.
[0013] As a further solution of the utility model, the stirring structure includes a stirring rod, which is rotated through a bearing and is located in the inner cavity of the sewage treatment tank. The outer wall of the stirring rod is rotatably connected to a plurality of stirring blades. The inner cavity of the stirring rod is rotatably plugged with a driving rod for driving the stirring blades to rotate synchronously. The outer wall of the sewage treatment tank is fixedly equipped with a driving structure for driving the stirring structure to rotate.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. When the utility model is used, by setting a monitoring structure, the injected flocculant is used to push the partition, and then the air bag is squeezed to allow the gas to enter the meter to push the display panel to move to intuitively reflect the amount of flocculant added, effectively provide real-time metering data, help operators to timely grasp the addition of flocculants and make adjustments, improve the accuracy of the device in controlling the amount of flocculant added, so that impurities such as suspended matter in sewage are fully flocculated, reduce the fluctuation of treatment effect caused by serious insufficient or excessive addition, and ensure subsequent sedimentation and filtration effects.
[0016] 2. When the utility model is used, by setting a control structure, the flow state inside the distribution box is controlled by relying on the flow impact force of the sewage itself, thereby reducing energy consumption, allowing the sewage to enter the distribution box and initially mix with the flocculant. At the same time, the sewage can also clean the inside of the distribution box, effectively preventing the flocculant from sticking and remaining inside the distribution box, reducing the risk of pipeline blockage due to the accumulation of residual flocculants, and improving the reliability and service life of the entire device.
[0017] 3. When the utility model is used, the sewage and the flocculant are fully and efficiently mixed by setting a stirring structure and adopting a stirring method combining rotation and revolution, thereby avoiding the occurrence of local uneven mixing, improving the overall working efficiency of the device, and helping to improve the stability and compliance rate of the final effluent water quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall structure of a flocculant addition device used in industrial wastewater treatment.
[0019] Figure 2 The figure is a cross-sectional view of the overall structure of a flocculant addition device used in industrial wastewater treatment.
[0020] Figure 3 This is a disassembled diagram of the monitoring structure in a flocculant addition device used in industrial wastewater treatment.
[0021] Figure 4 A cross-sectional view of the control structure of a flocculant addition device used in industrial wastewater treatment Figure 1 .
[0022] Figure 5A cross-sectional view of the control structure of a flocculant addition device used in industrial wastewater treatment Figure 2 .
[0023] Figure 6 A cross-sectional view of a stirring structure in a flocculant addition device for industrial wastewater treatment.
[0024] In the figure: 1. sewage treatment tank; 2. storage box; 3. distribution box; 4. injection pipe; 5. discharge pipe; 601. air bag; 602. partition; 603. meter; 604. limit block; 605. display board; 606. telescopic rod; 607. storage spring; 7. water inlet pipe; 8. drain pipe; 901. sealing plug; 902. connecting frame; 903. magnetic ring; 904. limit ring; 905. sealing plate; 906. rotating frame; 10. feed pipe; 11. water pump; 121. stirring rod; 122. stirring blade; 123. driving rod; 124. bevel gear one; 125. bevel gear two; 126. main gear; 127. gear ring; 128. slave gear; 129. driving motor. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Example 1: Please refer to Figure 1 to Figure 3 , a flocculant adding device for industrial sewage treatment, comprising a sewage treatment tank 1, a storage box 2 for storing flocculants is fixedly installed on the top surface of the sewage treatment tank 1, a distribution box 3 is installed on one side of the storage box 2, a monitoring structure for monitoring the amount of flocculants added is slidably installed in the inner cavity of the distribution box 3, an injection pipe 4 for injecting sewage is installed on the side of the distribution box 3 away from the storage box 2, a discharge pipe 5 for discharging sewage is fixedly installed on one side of the sewage treatment tank 1, and a stirring structure for accelerating the combination of sewage and flocculants is rotatably installed in the inner cavity of the sewage treatment tank 1;
[0027] The monitoring structure includes an airbag 601, one side of which is fixedly connected to the inner wall of the material distribution box 3, and a partition 602 for squeezing the airbag 601 to shrink is fixedly installed on the other side of the airbag 601, and a meter 603 for real-time display of the amount of flocculant added is fixedly installed on the outer wall of the material distribution box 3, and the airbag 601 is connected to the meter 603 through an air pipe, and the flocculant injected into the material distribution box 3 pushes the partition 602 to move, so that the partition 602 squeezes the airbag 601, and the gas inside the airbag 601 enters the meter 603, thereby reflecting the amount of flocculant added in real time;
[0028] Specifically, the upper and lower ends of the partition 602 are fixedly installed with limit blocks 604 for preventing the partition 602 from tilting when moving, and the inner wall of the material distribution box 3 is provided with a limit groove for providing movement of the limit block 604, and the limit block 604 is located in the limit groove, and the inner walls on both sides of the limit groove are inclined toward the center of the limit groove, and the side of the limit block 604 close to the inner wall of the limit groove is provided with an inclined surface parallel to the inner wall of the limit groove, and the limit block 604 is trapezoidal, and the limit block 604 can be limited by the mutual cooperation of the limit block 604 and the limit groove to prevent the partition 602 from tilting during the sliding process;
[0029] More specifically, the inner cavity of the metering device 603 is provided with a metering cavity, a display panel 605 is slidably installed inside the metering cavity, protrusions for ensuring the smooth movement of the display panel 605 are fixedly installed on both sides of the display panel 605, a moving groove for providing the movement of the protrusion is provided on the inner wall of the metering device 603, and the protrusion is located in the moving groove, the material of the metering device 603 is transparent plastic, when the partition 602 squeezes the airbag 601, the air inside the airbag 601 is pressed into the metering device 603 through the pipeline, and the air is used as a power source to push the display panel 605 to move smoothly along the inner cavity of the metering device 603, and a scale is provided on the outer wall of the metering device 603 to more clearly observe the amount of flocculant added;
[0030] A telescopic rod 606 is fixedly installed in the inner cavity of the resetting airbag 601, and a force storage spring 607 for providing resetting power is fixedly installed in the inner cavity of the telescopic rod 606;
[0031] Specifically, the telescopic rod 606 is composed of an outer rod and an inner rod, and the inner rod is slidably inserted in the outer rod, and the force storage spring 607 is fixedly installed between the inner rod and the outer rod. There are four groups of two telescopic rods 606 and force storage springs 607 and they are symmetrically and evenly distributed to facilitate a more complete expansion and reset airbag 601.
[0032] See also Figure 1 to Figure 3A water inlet pipe 7 for initially mixing sewage and flocculant is fixedly installed on one side of the distribution box 3, and a drainage pipe 8 for discharging sewage and flocculant is fixedly installed on the bottom end of the distribution box 3. One side of the water inlet pipe 7 and the drainage pipe 8 are fixedly connected to the injection pipe 4, and the inner cavities of the water inlet pipe 7 and the drainage pipe 8 are rotatably installed with a control structure for controlling the internal flow state of the distribution box 3;
[0033] Specifically, a support rod is fixedly installed at the bottom end of the distribution box 3, and the distribution box 3 is fixedly connected to the upper surface of the sewage treatment box 1 through the support rod and the drainage pipe 8, and the bottom end of the injection pipe 4 is fixedly connected to the outer wall of the sewage treatment box 1;
[0034] See also Figure 2 , Figure 4-5 The control structure includes a sealing plug 901, which is slidably located in the inner cavity of the water inlet pipe 7, a connecting frame 902 is fixedly installed on one side of the sealing plug 901, and the material of the connecting frame 902 is set to stainless steel, and one end of the connecting frame 902 away from the sealing plug 901 is magnetically connected to a magnetic ring 903 for fixing the sealing plug 901, and the magnetic ring 903 is fixedly connected to the inner wall of the water inlet pipe 7;
[0035] Specifically, an empty slot is provided inside the connection frame 902 to facilitate the flow of sewage, and a limiting ring 904 is fixedly installed in the inner cavity of the water inlet pipe 7 to prevent the connection frame 902 from falling off;
[0036] More specifically, the magnetic ring 903 is used to absorb and fix the connecting frame 902 to pull the sealing plug 901 to move into the water inlet pipe 7, thereby blocking the water inlet pipe 7, so that the water inlet pipe 7 is in a sealed state; when sewage flows inside the injection pipe 4, a part of the sewage enters the water inlet pipe 7, thereby impacting and pushing the connecting frame 902 away from the magnetic ring 903, driving the sealing plug 901 to move to the outside of the water inlet pipe 7 until the connecting frame 902 contacts the limiting ring 904, so that the water inlet pipe 7 is in a flowing state, so that a part of the sewage enters the distribution box 3 and is preliminarily mixed with the flocculant. At the same time, the sewage cleans the inside of the distribution box 3 to a certain extent, preventing the flocculant from sticking and remaining in the distribution box 3;
[0037] The control structure also includes a sealing plate 905, which is rotatably mounted in the inner cavity of the drain pipe 8 via a pin shaft, and a rotating frame 906 for driving the sealing plate 905 to flip is fixedly mounted at the bottom end of the sealing plate 905;
[0038] Specifically, the bottom end of the drain pipe 8 is connected to the interior of the sewage treatment tank 1, and a rotating groove for providing a turning frame 906 for flipping is opened on one side of the drain pipe 8. The remaining sewage is transported to the inside of the drain pipe 8 through the injection pipe 4, and the impact force of the water flow is used to push the rotating frame 906 to drive the sealing plate 905 to flip with the pin shaft inside the sealing plate 905 as the fixed point, so that the rotating frame 906 moves into the rotating groove, allowing the sealing plate 905 to tilt, thereby facilitating the sewage and flocculant inside the distribution box 3 to flow from the drain pipe 8 into the sewage treatment tank 1; after the sewage is transported, the rotating frame 906 is affected by gravity, driving the sealing plate 905 to flip and reset, and at the same time, the outer wall of the sealing plate 905 is provided with a damping coating, which is a rubber coating, so as to prevent the rotating frame 906 from driving the sealing plate 905 to swing at will.
[0039] See also Figure 1 , Figure 3 , Figure 5 A feed pipe 10 is fixedly installed on one side of the storage box 2. The storage box 2 is connected to the distribution box 3 through a pipeline, and a water pump 11 is fixedly installed on the outer wall of the pipeline.
[0040] Example 2: Please refer to Figure 1 , Figure 2 , Figure 6 The stirring structure includes a stirring rod 121, which is rotatably located in the inner cavity of the sewage treatment tank 1 through a bearing, and a plurality of stirring blades 122 are rotatably connected to the outer wall of the stirring rod 121, and a driving rod 123 for driving the stirring blades 122 to rotate synchronously is rotatably inserted into the inner cavity of the stirring rod 121, and a driving structure for driving the stirring structure to rotate is fixedly installed on the outer wall of the sewage treatment tank 1;
[0041] Specifically, a bevel gear 124 is fixedly installed on the outer wall of the driving rod 123, and a bevel gear 125 is fixedly installed on one end of the stirring blade 122 close to the driving rod 123, and the bevel gear 124 is meshed with the bevel gear 125;
[0042] More specifically, the driving structure includes a main gear 126, which is located on the outer wall of one end of the driving rod 123. One end of the stirring rod 121 passes through the sewage treatment tank 1 and is fixedly installed with a gear ring 127. The gear ring 127 is meshed with the main gear 126 through a slave gear 128 for changing the direction of rotation. The slave gear 128 is located between the gear ring 127 and the main gear 126, and the gear ring 127 is rotatably connected to one end of the stirring rod 121 through a pin shaft. A driving motor 129 is installed on the outside of the sewage treatment tank 1, and the output shaft of the driving motor 129 is fixedly connected to one end of the stirring rod 121.
[0043] The working principle of the utility model is:
[0044] First, the flocculant is injected into the storage box 2 from the feed pipe 10, and the flocculant is pumped into the distribution box 3 through the pipe connected by the water pump 11. The gradually accumulated flocculant pushes the partition 602 to move, so that the partition 602 squeezes the air bag 601, and the gas inside the air bag 601 enters the meter 603. The gas pushes the display board 605 to move on the meter 603 to reflect the amount of flocculant added in real time. When the appropriate amount of flocculant is injected, the water pump 11 stops working;
[0045] Then, the sewage after impurities have been filtered is transported by the injection pipe 4, and a part of the sewage enters the water inlet pipe 7, which then impacts and pushes the connecting frame 902 away from the magnetic ring 903, driving the sealing plug 901 to move to the outside of the water inlet pipe 7 until the connecting frame 902 contacts the limiting ring 904, so that the water inlet pipe 7 is in a smooth state, and the sewage smoothly enters the distribution box 3 and is preliminarily mixed with the flocculant. At the same time, the inflow of sewage can also effectively clean the interior of the distribution box 3 to prevent the flocculant from sticking and remaining in the distribution box 3. When the sewage flows out, the connecting frame 902 is attracted by the magnetic ring 903, and drives the sealing plug 901 to return to the inside of the water inlet pipe 7 again, so that the water inlet pipe 7 is in a sealed state, which is convenient for the next use;
[0046] At the same time, the injection pipe 4 transports the remaining part of the sewage to the drain pipe 8, and uses the impact force of the water flow to push the rotating frame 906 to drive the sealing plate 905 to flip, so that the sealing plate 905 is tilted, so that the sewage and flocculant in the distribution box 3 flow into the sewage treatment tank 1 from the drain pipe 8. After the sewage transportation is completed, the rotating frame 906 is affected by gravity, driving the sealing plate 905 to flip and reset, and the position of the water inlet pipe 7 is higher than that of the drain pipe 8. A part of the sewage in the injection pipe 4 first enters the distribution box 3 through the water inlet pipe 7 and is preliminarily mixed with the flocculant. The remaining sewage in the injection pipe 4 then enters the sewage treatment tank 1 through the drain pipe 8. At the same time, the impact force generated by the flow of the remaining sewage pushes the flipping sealing plate 905, so that a part of the sewage and flocculant in the distribution box 3 enter the sewage treatment tank 1 through the drain pipe 8 and are finally mixed with the remaining sewage.
[0047] Finally, start the drive motor 129 to connect the stirring rod 121 to drive the bevel gear 124 to rotate, and the bevel gear 124 engages with the bevel gear 2 125 to drive the stirring blade 122 to rotate. At the same time, when the stirring rod 121 rotates, it drives the main gear 126 to engage with the slave gear 128 to control the gear ring 127 to rotate in the opposite direction synchronously, so that the gear ring 127 drives the stirring rod 121 to drive the stirring blade 122 to revolve. Through the stirring method combining rotation and revolution, the sewage and flocculant can be mixed more efficiently, ensuring the improvement of sewage treatment effect.
[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A flocculant adding device for industrial wastewater treatment, comprising a wastewater treatment tank (1), characterized in that: A storage box (2) for storing flocculants is fixedly mounted on the top surface of the sewage treatment box (1); a distribution box (3) is mounted on one side of the storage box (2); a monitoring structure for monitoring the amount of flocculants added is slidably mounted in the inner cavity of the distribution box (3); an injection pipe (4) for injecting sewage is mounted on the side of the distribution box (3) away from the storage box (2); a discharge pipe (5) for discharging sewage is fixedly mounted on one side of the sewage treatment box (1); and a stirring structure for accelerating the combination of sewage and flocculants is rotatably mounted in the inner cavity of the sewage treatment box (1); The monitoring structure comprises an airbag (601), one side of the airbag (601) is fixedly connected to the inner wall of the distribution box (3), and a partition (602) for squeezing the airbag (601) to shrink is fixedly installed on the other side of the airbag (601), a meter (603) for real-time display of the amount of flocculant added is fixedly installed on the outer wall of the distribution box (3), and the airbag (601) is connected to the meter (603) through an air pipe, and the flocculant injected into the distribution box (3) pushes the partition (602) to move, so that the partition (602) squeezes the airbag (601), and the gas inside the airbag (601) enters the meter (603), thereby reflecting the amount of flocculant added in real time.
2. The flocculant adding device for industrial wastewater treatment according to claim 1, characterized in that: A telescopic rod (606) is fixedly mounted in the inner cavity of the airbag (601), and a force storage spring (607) for providing restoring power is fixedly mounted in the inner cavity of the telescopic rod (606).
3. The flocculant adding device for industrial wastewater treatment according to claim 1, characterized in that: A water inlet pipe (7) for initially mixing sewage and flocculant is fixedly mounted on one side of the distribution box (3), and a drainage pipe (8) for discharging sewage and flocculant is fixedly mounted on the bottom end of the distribution box (3). One side of the water inlet pipe (7) and the drainage pipe (8) are both fixedly connected to the injection pipe (4), and control structures for controlling the internal flow state of the distribution box (3) are rotatably mounted in the inner cavities of the water inlet pipe (7) and the drainage pipe (8).
4. The flocculant adding device for industrial wastewater treatment according to claim 3, characterized in that: The control structure comprises a sealing plug (901), the sealing plug (901) being slidably located in the inner cavity of the water inlet pipe (7), a connecting frame (902) being fixedly mounted on one side of the sealing plug (901), and the material of the connecting frame (902) being set to stainless steel, and a magnetic ring (903) for fixing the sealing plug (901) being magnetically connected to one end of the connecting frame (902) away from the sealing plug (901), and the magnetic ring (903) being fixedly connected to the inner wall of the water inlet pipe (7).
5. The flocculant adding device for industrial wastewater treatment according to claim 4, characterized in that: The control structure further comprises a sealing plate (905), wherein the sealing plate (905) is rotatably mounted in the inner cavity of the drain pipe (8) via a pin shaft, and a rotating frame (906) is fixedly mounted at the bottom end of the sealing plate (905) for driving the sealing plate (905) to flip.
6. The flocculant adding device for industrial wastewater treatment according to claim 1, characterized in that: The stirring structure comprises a stirring rod (121), the stirring rod (121) being rotatably located in the inner cavity of the sewage treatment tank (1) via a bearing, the outer wall of the stirring rod (121) being rotatably connected to a plurality of stirring blades (122), the inner cavity of the stirring rod (121) being rotatably plugged with a driving rod (123) for driving the stirring blades (122) to rotate synchronously, and the outer wall of the sewage treatment tank (1) being fixedly mounted with a driving structure for driving the stirring structure to rotate.
Citation Information
Patent Citations
Flocculating agent adding device
CN217051737U