CN217148679U - Hydraulic circulation clarification tank - Google Patents
Hydraulic circulation clarification tank Download PDFInfo
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- CN217148679U CN217148679U CN202122809732.3U CN202122809732U CN217148679U CN 217148679 U CN217148679 U CN 217148679U CN 202122809732 U CN202122809732 U CN 202122809732U CN 217148679 U CN217148679 U CN 217148679U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model relates to a sewage treatment field especially relates to a hydraulic circulation depositing reservoir, include: the middle part of the clarification tank body is provided with a supporting structure; the separation chamber is arranged on the periphery of the clarification tank body and comprises a sludge concentration chamber at the lower part and an annular water collecting tank positioned at the upper part of the sludge concentration chamber; the first reaction chamber is connected and arranged in the second reaction chamber, the bottom of the first reaction chamber is connected and provided with a throat pipe, and an adjustable gap is formed between the throat pipe and the bottom of the clarification tank body; the water inlet assembly is arranged at the bottom of the clarification tank body, and the throats of the water inlet assembly are arranged oppositely; the water drainage component is arranged at the upper end of the outer wall of the clarification tank body, and the annular water collection grooves of the water drainage component are communicated with each other. The utility model discloses can increase collision and flocculation between the suspended particle, can make the mud sediment layer remain the activity of contact flocculation throughout simultaneously, small in size need not complicated electromechanical device simultaneously.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to a hydraulic circulation depositing reservoir.
Background
In the existing stage of water treatment, a coagulation process is widely used, and the coagulation process comprises three stages of mixing and reacting water and a medicament and separating a flocculating constituent from the water. The clarification tank is special equipment for completing the three processes.
The clarification tank is a commonly used treatment structure in the field of water treatment, is mainly used for removing suspended substances and colloids in water and lays a foundation for removing dissolved substances. The traditional sludge circulation type clarification tank adopts mechanical stirring, and mechanical stirring equipment can be arranged at the center of the tank body, but the conventional clarification tank has the defects of higher investment cost, higher energy consumption, serious corrosion and difficult maintenance.
For example, an improved mechanical stirring clarification tank with application number CN201920717451.5, which comprises a clarification tank, a driving device, a lifting impeller, a first reaction chamber, a second reaction chamber, a water inlet pipe, a water outlet pipe and a sludge discharge pipe, wherein the interior of the clarification tank comprises two parts, namely a cylindrical upper part and an inverted conical lower part, support columns are arranged on the outer side of the clarification tank, and support beams are erected at the tops of the support columns; a second reaction chamber is arranged at the center of the upper part in the clarification tank, a first reaction chamber is arranged at the center in the second reaction chamber, the top of the first reaction chamber is open, a hole is formed in the center of the bottom plate, and the top of the second reaction chamber extends to the top wall and the bottom of the clarification tank; the supporting beam is provided with a driving device, the bottom of the driving device is connected with and drives a lifting impeller arranged at the bottom in the first reaction chamber through a driving shaft, the bottom of the lifting impeller is connected with a stirring shaft, and the stirring shaft and blades on the stirring shaft penetrate through a central opening of a bottom plate of the first reaction chamber and are arranged in the inverted cone-shaped lower part of the clarification tank.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the mechanical stirring depositing reservoir among the prior art and have that investment cost is higher, and the power consumption is great, corrodes seriously, maintains the defect of difficulty, provides a hydraulic circulation clarification and is used for overcoming above-mentioned defect.
In order to realize the purpose of the utility model, the utility model discloses a following technical scheme realizes:
a hydronic clarification comprising:
the middle part of the clarification tank body is provided with a supporting structure;
the separation chamber is arranged on the periphery of the clarification tank body and comprises a sludge concentration chamber at the lower part and an annular water collecting tank positioned at the upper part, and a sludge discharge pipe is arranged at the bottom of the sludge concentration chamber;
the second reaction chamber is erected at the upper end of the support structure and is communicated with the separation chamber;
the first reaction chamber is connected and arranged in the second reaction chamber, the bottom of the first reaction chamber is connected and provided with a throat pipe, and an adjustable gap is formed between the throat pipe and the bottom of the clarification tank body;
the water inlet assembly is arranged at the bottom of the clarification tank body and is opposite to the throat pipe;
and the drainage assembly is arranged at the upper end of the outer wall of the clarification tank body and is communicated with the annular water collecting tank.
The hydraulic circulation clarification of the utility model mainly comprises a first reaction chamber, a second reaction chamber and a separation chamber. In the first and second reaction chambers, the colloid in raw water and the return sludge are flocculated by contact, and separated in a separation chamber after being formed into large flocs. The clean water is discharged upwards along the annular water collecting groove. One part of the settled sludge enters the sludge concentration chamber and is discharged through the sludge discharge pipe, and the other part of the settled sludge is sucked into the throat pipe along the backflow seam and then enters the first flocculation chamber for flocculation.
The equalizing basin waste water promotes to high-efficient clarification processing apparatus through the pump and handles, mainly divide into reaction section, disengagement section and fillter section, and the reaction section is the coagulating process of medicament and intaking, guarantees the best effect of coagulating of medicament and intaking through optimal design to on the one hand the use amount of minimize medicament, on the other hand more is favorable to the separation after the reaction. The wastewater in the regulating tank passes through the water inlet assembly, and negative pressure is formed around the wastewater to suck sludge. So that the raw water, the sludge and the coagulant are fully and violently and rapidly mixed. Thereby increasing collisions between the suspended particles. Accelerating the contact flocculation and achieving the purpose of separating mud and water. The working principle is that according to the viewpoint of 'flash mixing', 'double electric layer action' and 'chemical bridging action' in the modern flocculation theory, the contact flocculation activity of the sludge is fully utilized, the sludge is enabled to flow back to participate in mixed flocculation, the sludge layer is enabled to be always in a metabolism state through continuous dosing and intermittent sludge discharge, and the sludge layer always keeps the contact flocculation activity.
Preferably, the supporting structure comprises a plurality of inclined tube support beams arranged at intervals along the inner wall of the supporting structure, the end part of each inclined tube support beam is connected with the top of a vertical column vertically arranged in the clarification tank body, and the second reaction chamber is erected at the upper end of the vertical column.
The utility model discloses at the inside bearing structure that sets up of depositing reservoir body, it can play good supporting effect to the second reacting chamber to can effectively keep the stability in water treatment process. Simultaneously, through the mode of multiunit pipe chute support roof beam and stand, can effectively disperse the weight of second reaction chamber to can further guarantee the stability of second reaction chamber. Meanwhile, water flowing out of the second reaction chamber can flow into the separation chamber through the gaps between the upright columns for sludge separation, so that the actual use effect is not influenced.
Preferably, the first reaction chamber is in a conical shape with a wide upper part and a narrow lower part, the upper end of the first reaction chamber is fixedly connected with the second reaction chamber through a support pull rod, a lantern ring is sleeved outside the lower end of the first reaction chamber, and the lantern ring is fixedly connected with the upright post through a plurality of support rods.
The utility model provides a first reaction chamber is narrow toper under wide, enters into first reaction chamber back when water from first reaction chamber below, owing to through the reducing pipeline, therefore its rivers can change to can increase the contact reaction efficiency with the mud sediment.
Preferably, the water inlet assembly comprises a water inlet pipe, the end part of the water inlet pipe, which is positioned in the clarification tank body, is provided with a water ejector nozzle, and the water ejector nozzle is arranged opposite to the throat pipe.
Preferably, the lower end of the sludge concentration chamber is conical, and the area of the sludge discharge pipe, which is positioned inside the sludge concentration chamber, extends downwards to the bottom of the sludge concentration chamber along the inner wall of the sludge discharge pipe.
The utility model provides a lower extreme of mud sediment concentration chamber is conical, consequently can guarantee that the mud sediment can not fix and stop removing, and the mud sediment after the flocculation and precipitation can be along the inner wall of mud sediment concentration chamber downward slip to bottommost to can guarantee that mud can enter into first reaction chamber through the adjustable space that exists between choke and the depositing reservoir body bottom.
Preferably, the bottom of the sludge concentrating chamber is also provided with a vent pipe, and the vent pipe extends to the bottom of the water inlet assembly.
Preferably, a plurality of bracket supporting frames fixedly connected with the inner wall of the clarification tank body are arranged at the top of the separation chamber, and the annular water collecting tank is arranged above the bracket supporting frames;
the bottom of the annular water collecting tank is provided with a water inlet hole for water inlet, and one side of the annular water collecting tank is provided with a drainage tube communicated with the drainage assembly.
Preferably, the drainage assembly comprises a water outlet hopper arranged outside the shell and arranged below the drainage tube, a water outlet pipe and an overflow pipe penetrate through the water outlet hopper, the top of the water outlet pipe is communicated with the bottom of the water outlet hopper, and the top of the overflow pipe extends to the middle of the water outlet hopper.
Preferably, the upper end of the clarification tank body is provided with a control lever above the first reaction chamber, and the control lever is connected with the throat pipe through a connecting mechanism so as to control the vertical height of the throat pipe.
The utility model discloses be provided with the control rod in the top of depositing reservoir body to be connected through coupling mechanism and choke, but the control rod optional use with depositing reservoir body upper end swing joint's connecting rod, coupling mechanism can choose for use the lower extreme to be connected with the choke, and the upper end is perhaps connected the rope with control rod threaded connection's connecting rod, thereby can make the choke up-and-down motion under the prerequisite of rotating the connecting rod, thereby the size in adjustable space between adjustment choke and the depositing reservoir body bottom.
Preferably, the upper end of the clarification tank body is also provided with a step plate, and the side edge of the step plate is also provided with a railing.
Therefore, the utility model discloses following beneficial effect has:
(1) the settling pond adopted by the system belongs to a sludge circulation type settling pond, the inlet of the settling pond is a variable diameter pipeline, the flow velocity of water flow is changed, and raw water after dosing and mixing enters the settling pond at a high speed. In the first reaction chamber, the sludge is in contact reaction with circulating sludge which is several times of raw water under the condition of stirring. Then the reaction is continued in the second reaction chamber to form larger flocs. Then enters a separation chamber through a diversion chamber for precipitation separation.
(2) The raw water passes through the nozzle of the water injector, and negative pressure is formed around the nozzle to suck sludge. So that the raw water, the sludge and the coagulant are fully and violently and rapidly mixed. Thereby increasing collisions between the suspended particles. Accelerate the contact flocculation effect, make full use of the contact flocculation activity of mud sediment makes its mud sediment backward flow participate in mixing flocculation, through adding medicine in succession and intermittent type mud discharging, makes the mud sediment layer be in the metabolism state always, and the mud sediment layer remains the activity of contact flocculation throughout.
(3) The structure is simple and complex electromechanical equipment is not needed; no stirrer and mixer is required.
(4) Small volume and small occupied area.
Drawings
Fig. 1 is a top view of the present invention.
Fig. 2 is a longitudinal sectional view of the present invention.
Fig. 3 is an enlarged view of the connection structure between the first reaction chamber and the sleeve ring according to the present invention.
Fig. 4 is a schematic structural view of the annular water collecting tank of the present invention.
Fig. 5 is a schematic structural view of the drainage assembly of the present invention.
Wherein: the clarification tank comprises a clarification tank body 10, a supporting structure 11, an inclined tube support beam 12, a vertical column 13, a control lever 14, a connecting mechanism 15, a step plate 16, a railing 17, a separating chamber 20, a sludge concentrating chamber 21, an annular water collecting tank 22, a sludge discharge pipe 23, a blow-down pipe 24, a bracket support 25, a water inlet hole 26, a drainage pipe 27, a second reaction chamber 30, a first reaction chamber 40, a throat pipe 41, an adjustable gap 42, a lantern ring 43, a supporting rod 44, a supporting pull rod 45, a water inlet assembly 50, a water inlet pipe 51, a water injector nozzle 52, a drainage assembly 60, a water outlet hopper 61, an overflow pipe 62 and a water outlet pipe 63.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Moreover, references to embodiments of the invention in the following description are generally only to be considered as examples of the invention, and not as all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.
Example 1
As shown in figures 1-5, a hydraulic circulation clarification comprises a clarification tank body 10, the upper end of which is a cylinder and the lower end of which is a cone. The interior of the clarification tank body 10 is provided with a first reaction chamber 40, a second reaction chamber 30 and a separation chamber 20 from the inside to the outside in sequence, the bottom of the clarification tank body 10 is also provided with a set of water inlet assemblies 50 which are arranged opposite to the first reaction chamber 40, and the upper end of the outer wall of the clarification tank body 10 is also provided with a set of water drainage assemblies 60.
Raw water firstly enters the first reaction chamber 40 and the second reaction chamber 30 from the water inlet assembly 50 in sequence, so that the raw water, sludge and a coagulant are fully and violently and rapidly mixed, collision among suspended particles is increased, and contact flocculation is accelerated. Then enters the separation chamber 20 to realize the decontamination separation, clear water flows upwards out of the clarification tank body 10 and finally enters the drainage assembly 60, and one part of sludge is discharged out of the clarification tank body 10, and the other part of sludge is sucked into the first reaction chamber 40 to be recycled.
Wherein: the middle part of the clarification tank body 10 is provided with a supporting structure 11, the supporting structure 11 comprises a plurality of inclined tube support beams 12 which are arranged along the inner wall of the clarification tank body at intervals, the end part of each inclined tube support beam 12 is connected with the top part of a vertical column 13 which is vertically arranged inside the clarification tank body 10, and the second reaction chamber 30 is erected at the upper end of the vertical column 13. The weight of the second reaction chamber 30 can be effectively dispersed by the mode of the plurality of groups of inclined tube support beams 12 and the upright columns 13, so that a good supporting effect is achieved on the second reaction chamber 30, and the stability in the water treatment process is effectively maintained. Meanwhile, the water flowing out of the second reaction chamber 30 can flow into the separation chamber 20 through the gap between the columns 13 to separate sludge, so that the actual use effect is not affected.
The first reaction chamber 40 is a cone with a wide upper part and a narrow lower part, and the height of the upper end surface of the first reaction chamber 40 is lower than that of the upper end surface of the second reaction chamber 30, so that after water enters the first reaction chamber 40 from the lower part of the first reaction chamber 40, the water flow in the first reaction chamber can be changed due to the fact that the water passes through the reducing pipeline, and therefore the contact reaction efficiency with sludge can be improved. The upper end of the first reaction chamber 40 is fixedly connected with the second reaction chamber 30 through a support pull rod 45, a lantern ring 43 is sleeved outside the lower end of the first reaction chamber, and the lantern ring 43 is fixedly connected with the upright column 13 through a plurality of support rods 44. Therefore, the utility model discloses a be provided with fixing device about all to first reacting chamber 40, can effectively promote first reacting chamber 40's stability. The bottom of the first reaction chamber 40 is further provided with a throat 41 in an up-and-down movable connection manner, a connecting mechanism 15 is arranged inside the throat 41, the upper end of the connecting mechanism can be a threaded structure, and a connecting rod or a connecting rope is fixedly connected with the lower end of the throat 41, so that excessive limitation is not performed again. When the connecting rod or the connecting rope is pulled up and down, an adjustable gap 42 exists between the throat 41 and the bottom of the clarification tank body 10, so that the amount of active sludge entering the first reaction chamber 40 can be adjusted.
Corresponding with coupling mechanism, the upper end of clarifier body 10 is located the top of first reacting chamber 40 and is provided with a control rod 14, and its and clarifier body 10 upper end swing joint, its and coupling mechanism 15 connected mode can be selected through containing with the connecting building of connecting rod helicitic texture looks adaptation, perhaps direct and be connected rope fixed connection to can consider to play the effect of drawing from top to bottom to coupling mechanism in the in-process of rotating control rod 14, thereby adjust the size of adjustable space 42.
The separation chamber 20 comprises a sludge concentration chamber 21 in its lower part and an annular water collection sump 22 in its upper part.
Wherein the lower end of the sludge concentration chamber 21 is conical, two sludge discharge pipes 23 are symmetrically arranged at the left side and the right side of the sludge concentration chamber, and the area of the sludge discharge pipe 23 positioned inside the sludge concentration chamber 21 extends downwards along the inner wall of the sludge concentration chamber. The bottom of the sludge concentrating chamber 21 is also provided with a vent pipe 24, and the vent pipe 24 extends to the bottom of the water inlet assembly 50.
The top of the separation chamber 20 is provided with a plurality of bracket support frames 25 fixedly connected with the inner wall of the clarification tank body 10, the annular water collection tank 22 is arranged above the bracket support frames 25, the bottom of the annular water collection tank 22 is provided with a water inlet hole 26 for water inlet, and one side of the annular water collection tank 22 is provided with a drainage pipe 27 communicated with a drainage assembly 60.
The water inlet assembly 50 includes a water inlet pipe 51, and the end of the water inlet pipe 51 located inside the clarifier body 10 is provided with a water ejector nozzle 52, and the water ejector nozzle 52 is arranged opposite to the throat 41.
The drainage assembly 60 is arranged at the upper end of the outer wall of the clarification tank body 10 and is communicated with the annular water collecting tank 22, and specifically comprises a water outlet bucket 61 arranged outside the shell 1 and arranged below the drainage tube 27, a water outlet pipe 63 and an overflow pipe 62 are arranged inside the water outlet bucket 61 in a penetrating manner, the top of the water outlet pipe 63 is communicated with the bottom of the water outlet bucket 61, and the top of the overflow pipe 62 extends to the middle of the water outlet bucket 61.
In order to facilitate the feeding and the maintenance of the clarification tank, the utility model discloses still be provided with step plate 16 in clarification tank body 10 upper end, the maintainer can follow step plate 16 and walk to the clarification tank top and observe, still be provided with railing 17 at step plate 16's side for ensuring safety.
Therefore, the utility model discloses following beneficial effect has: the settling pond adopted by the system belongs to a sludge circulation type settling pond, the inlet of the settling pond is a variable diameter pipeline, the flow velocity of water flow is changed, and raw water after dosing and mixing enters the settling pond at a high speed. In the first reaction chamber 40, contact reaction with circulating sludge several times as much as raw water is performed under agitation. Then the reaction is continued in the second reaction chamber 30 to form larger flocs. Then enters the separation chamber 20 through the diversion chamber for precipitation separation. The raw water passes through the ejector nozzle 52, and a negative pressure is formed around the nozzle to suck sludge. So that the raw water, the sludge and the coagulant are fully and violently and rapidly mixed. Thereby increase the collision between the suspension granule for contact flocculation, make full use of the contact flocculation activity of mud sediment makes its mud sediment backward flow participate in mixing flocculation, through adding medicine and intermittent type mud drainage in succession, makes the mud sediment layer be in the metabolism state always, and the mud sediment layer remains the activity of contact flocculation throughout.
Claims (10)
1. A hydronic clarification, comprising:
the clarification tank comprises a clarification tank body (10), wherein a support structure (11) is arranged in the middle of the clarification tank body;
the separation chamber (20) is arranged on the periphery of the clarification tank body (10) and comprises a sludge concentration chamber (21) at the lower part and an annular water collecting tank (22) positioned at the upper part, and a sludge discharge pipe (23) is arranged at the bottom of the sludge concentration chamber (21);
a second reaction chamber (30) mounted at the upper end of the support structure (11) and communicating with the separation chamber (20);
the first reaction chamber (40) is connected and arranged in the second reaction chamber (30), the bottom of the first reaction chamber is vertically and movably connected with a throat pipe (41), and an adjustable gap (42) is formed between the throat pipe (41) and the bottom of the clarification tank body (10);
a water inlet component (50) which is arranged at the bottom of the clarification tank body (10) and is opposite to the throat pipe (41);
and the drainage assembly (60) is arranged at the upper end of the outer wall of the clarification tank body (10) and is communicated with the annular water collecting tank (22).
2. A hydraulic cycle clarification according to claim 1,
the support structure (11) comprises a plurality of inclined tube support beams (12) which are arranged along the inner wall of the support structure at intervals, the end part of each inclined tube support beam (12) is connected with the top of a vertical column (13) which is vertically arranged in the clarification tank body (10), and the second reaction chamber (30) is erected at the upper end of the vertical column (13).
3. A hydraulic cycle clarification according to claim 2,
the first reaction chamber (40) is in a shape of a cone with a wide upper part and a narrow lower part, the upper end of the first reaction chamber is fixedly connected with the second reaction chamber (30) through a supporting pull rod (45), a lantern ring (43) is sleeved outside the lower end of the first reaction chamber, and the lantern ring (43) is fixedly connected with the upright post (13) through a plurality of supporting rods (44).
4. A hydraulic cycle clarification according to claim 1,
the water inlet assembly (50) comprises a water inlet pipe (51), a water ejector nozzle (52) is arranged at the end part, located inside the clarification tank body (10), of the water inlet pipe (51), and the water ejector nozzle (52) is arranged opposite to the throat pipe (41).
5. A hydraulic cycle clarification according to claim 1,
the lower end of the sludge concentration chamber (21) is conical, and the area of the sludge discharge pipe (23) inside the sludge concentration chamber (21) extends downwards along the inner wall of the sludge concentration chamber.
6. A hydraulic cycle clarification according to claim 1 or 5,
the bottom of the sludge concentrating chamber (21) is also provided with an emptying pipe (24), and the emptying pipe (24) extends to the bottom of the water inlet assembly (50).
7. A hydraulic cycle clarification according to claim 1,
the top of the separation chamber (20) is provided with a plurality of bracket supporting frames (25) fixedly connected with the inner wall of the clarification tank body (10), and the annular water collecting tank (22) is arranged above the bracket supporting frames (25);
the bottom of the annular water collecting tank (22) is provided with a water inlet hole (26) for water inlet, and one side of the annular water collecting tank (22) is provided with a drainage pipe (27) communicated with a drainage assembly (60).
8. A hydraulic cycle clarification according to claim 1 or 7,
the drainage assembly (60) comprises a water outlet bucket (61) arranged outside the shell (1) and arranged below the drainage tube (27), a water outlet pipe (63) and an overflow pipe (62) penetrate through the water outlet bucket (61), the top of the water outlet pipe (63) is communicated with the bottom of the water outlet bucket (61), and the top of the overflow pipe (62) extends to the middle of the water outlet bucket (61).
9. A hydraulic cycle clarification according to claim 1,
an operating rod (14) is arranged at the upper end of the clarification tank body (10) above the first reaction chamber (40), and the operating rod (14) is connected with the throat pipe (41) through a connecting mechanism (15), so that the vertical height of the throat pipe (41) is controlled.
10. The hydraulic circulation clarification according to claim 1, wherein the upper end of the clarification tank body (10) is further provided with a step plate (16), and the side edge of the step plate (16) is further provided with a railing (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809732.3U CN217148679U (en) | 2021-11-17 | 2021-11-17 | Hydraulic circulation clarification tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809732.3U CN217148679U (en) | 2021-11-17 | 2021-11-17 | Hydraulic circulation clarification tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217148679U true CN217148679U (en) | 2022-08-09 |
Family
ID=82684566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122809732.3U Active CN217148679U (en) | 2021-11-17 | 2021-11-17 | Hydraulic circulation clarification tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217148679U (en) |
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2021
- 2021-11-17 CN CN202122809732.3U patent/CN217148679U/en active Active
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