CN217431095U - Raw oil filter and filtration system for carbon black production - Google Patents
Raw oil filter and filtration system for carbon black production Download PDFInfo
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- CN217431095U CN217431095U CN202220696581.7U CN202220696581U CN217431095U CN 217431095 U CN217431095 U CN 217431095U CN 202220696581 U CN202220696581 U CN 202220696581U CN 217431095 U CN217431095 U CN 217431095U
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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
- Y02W30/00—Technologies for solid waste management
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- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
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Abstract
The utility model relates to a raw oil filter and a filtering system for carbon black production, wherein the filter comprises a first shell and a filter element; the first shell is hollow, the interior of the first shell is a filter cavity, the lower part of the first shell is provided with an oil inlet, and the upper part of the first shell is provided with an oil outlet; the filter element is hollow and is arranged in the filter cavity, and the top end of the filter element is of an open structure; raw oil flows into the filter cavity from the oil inlet, sequentially passes through the outside of the filter element, the inside of the filter element and the top end opening of the filter element, and then flows out from the oil outlet. Compared with the traditional filter, the raw oil is converted from low potential energy to high potential energy in the filtering process and is not converted from high potential energy to low potential energy any more, so that the impact force generated by potential energy conversion is reduced, and the service lives of the filter element and the filter are prolonged. Simultaneously, because the oil inlet is less than the oil-out in vertical direction for the impurity of mixing in raw oil has comparatively sufficient time spontaneous precipitation, alleviates filterable load, and the existing filter effect that is favorable to improving also is favorable to prolonging the life of filter core.
Description
Technical Field
The utility model relates to a raw oil filtration equipment technical field especially relates to a raw oil filter and filtration system are used in carbon black production.
Background
In the carbon black manufacturing industry, raw oil is often used to produce carbon black. Before production, raw oil needs to be subjected to impurity removal treatment. The method for removing impurities from raw oil includes static water discharge method, forced dehydration method, step-by-step filtration method, regular tank cleaning method and mixing method. Among them, in the filtration method, the raw material oil is filtered using a filter to reduce the content of solid particle impurities and the content of other precipitates in the raw material.
However, the conventional raw oil filter for carbon black production has a short service life and cannot meet the actual production requirements.
SUMMERY OF THE UTILITY MODEL
For the life of solving traditional carbon black production with raw oil filter shorter, can't satisfy the problem that the actual production needs, the utility model provides a carbon black production is with raw oil filter and filtration system.
The raw oil filter for producing carbon black provided by the utility model comprises a first shell and a filter element;
the first shell is hollow, the interior of the first shell is a filter cavity, the lower part of the first shell is provided with an oil inlet, and the upper part of the first shell is provided with an oil outlet;
the filter element is hollow and is arranged in the filter cavity, and the top end of the filter element is of an open structure;
raw oil flows into the filter cavity from the oil inlet, sequentially flows through the outside of the filter element, the inside of the filter element and the top end opening of the filter element, and then flows out from the oil outlet.
In one embodiment, the filter cartridge includes a support frame and a screen;
the bottom end of the supporting framework is higher than the bottom end of the first shell by a preset height;
the filter screen is coated on the periphery and the bottom of the supporting framework.
In one embodiment, the filter element further comprises a magnetic rod;
the bar magnet is a plurality of, and the equal vertical setting of axis all locates support chassis's inside, and around support chassis's axis evenly distributed.
In one embodiment, the support framework comprises a vertical rod, a lower fixing ring, a lower cross rod, a middle fixing ring, a middle cross rod, an upper fixing ring and an upper cross rod;
the lower fixing ring is arranged at the lower part of the upright stanchion, and the plane of the lower fixing ring is vertical to the axis of the upright stanchion;
the lower transverse rods are uniformly distributed around the axis of the vertical rod, one end of each lower transverse rod is fixedly connected with the lower part of the vertical rod, and the other end of each lower transverse rod is fixedly connected with the inner side of the lower fixing ring;
the middle fixing ring is arranged in the middle of the vertical rod, and the plane of the middle fixing ring is vertical to the axis of the vertical rod;
the middle cross rods are distributed uniformly around the axis of the vertical rod, one end of each middle cross rod is fixedly connected with the middle part of the vertical rod, and the other end of each middle cross rod is fixedly connected with the inner side of the middle fixing ring;
the upper fixing ring is arranged at the upper part of the upright stanchion, and the plane of the upper fixing ring is vertical to the axis of the upright stanchion;
the upper transverse rods are uniformly distributed around the axis of the vertical rod, one end of each upper transverse rod is fixedly connected with the upper part of the vertical rod, and the other end of each upper transverse rod is fixedly connected with the inner side of the upper fixing ring;
the filter screen is coated at the bottom of the lower fixing ring, the outer side of the middle fixing ring and the outer side of the upper fixing ring;
the lower part of each magnetic rod is fixedly connected with the inner side of the lower fixing ring, the middle part of each magnetic rod is fixedly connected with the inner side of the middle fixing ring, and the upper part of each magnetic rod is fixedly connected with the inner side of the upper fixing ring.
In one specific embodiment, the device further comprises a second shell;
the second shell is hollow, the interior of the second shell is a slag storage cavity, the top of the second shell is connected with the bottom of the first shell so that the slag storage cavity is communicated with the filtering cavity, and the bottom of the second shell is provided with a slag outlet.
In one specific embodiment, the cross section of the second shell along the axial direction is in a V-shaped structure.
In one embodiment, the inner wall of the middle part of the first shell is provided with a bearing ring, and the plane of the bearing ring is vertical to the axis of the first shell;
the top end of the filter element is provided with a lap joint ring;
the bottom end of the lapping ring is tightly attached to the top end of the bearing ring.
In one embodiment, the device further comprises a cover;
the closing cap lid is located the top of first casing.
The raw oil filtering system for carbon black production based on the same concept comprises the filter, the oil inlet valve, the oil inlet pressure gauge, the oil outlet valve and the oil outlet pressure gauge which are provided by any one of the specific embodiments;
the input end of the oil inlet valve is communicated with the oil inlet pressure gauge, and the output end of the oil inlet valve is communicated with the oil inlet of the first shell;
the input end of the oil outlet valve is communicated with the oil outlet of the first shell, and the output end of the oil outlet valve is communicated with the oil outlet pressure gauge.
In one embodiment, the system further comprises an air intake valve;
the output end of the air inlet valve is communicated with the oil outlet of the first shell.
The utility model has the advantages that: the utility model discloses raw oil filter is used in carbon black production sets up the lower part at first casing through the oil inlet, and sets up the oil-out on the upper portion of first casing for raw oil flows into the filter chamber from the oil inlet, behind the outside of filter core, the inside of filter core and the top opening of filter core, flows from the oil-out in proper order. Compared with the traditional filter, the oil inlet is not arranged on the upper part of the filter, the oil outlet is not arranged on the lower part of the filter, the raw oil is converted from low potential energy to high potential energy in the filtering process, the high potential energy is not converted from the low potential energy to the low potential energy, the impact force generated by potential energy conversion is effectively reduced, the possibility that the filter element is damaged due to impact is greatly reduced, and the service lives of the filter element and the filter are effectively prolonged. Meanwhile, the oil inlet is lower than the oil outlet in the vertical direction, and the raw oil flows from bottom to top, so that the spontaneous precipitation of impurities mixed in the raw oil is facilitated, the filtering load is reduced, the filtering effect is improved, and the service life of the filter element is prolonged.
Drawings
FIG. 1 is a sectional view of a raw oil filter for carbon black production according to an embodiment of the present invention, taken along the axial direction;
FIG. 2 is a schematic structural view showing one embodiment of a filter element in the raw oil filter for carbon black production shown in FIG. 1;
FIG. 3 is a schematic view of an embodiment of a support frame in the filter cartridge of FIG. 2;
FIG. 4 is a schematic view of one embodiment of a screen in the filter cartridge of FIG. 2;
FIG. 5 is a schematic diagram of an embodiment of a magnetic rod in the filter cartridge of FIG. 2;
FIG. 6 is a schematic structural diagram of an embodiment of the raw oil filtration system for carbon black production according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axis", "circumferential" and the like refer to the orientation or positional relationship shown in the drawings, which are only for convenience of description of the present invention or simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, 2, 3, 4 and 5, a raw oil filter 100 for carbon black production according to an embodiment of the present invention includes a first housing 110 and a filter element 120. The first housing 110 is a hollow structure, the interior of the first housing 110 is a filter chamber, the lower portion of the first housing is provided with an oil inlet 111, and the upper portion of the first housing is provided with an oil outlet 112. The filter element 120 is hollow and is disposed in the filter chamber, and the top end of the filter element is an open structure.
In this embodiment, the raw oil flows into the filter cavity from the oil inlet 111, sequentially passes through the outside of the filter element 120, the inside of the filter element 120 and the top opening of the filter element 120, and then flows out from the oil outlet 112. Compared with the traditional filter 100, the oil inlet 111 is not arranged at the upper part of the filter 100, and the oil outlet 112 is not arranged at the lower part of the filter 100, but the oil inlet 111 is arranged at the lower part of the first shell 110, and the oil outlet 112 is arranged at the upper part of the first shell 110, so that the raw oil is converted from low potential energy to high potential energy in the filtering process, and is not converted from high potential energy to low potential energy, the impact force generated by potential energy conversion is effectively reduced, the possibility that the filter element 120 is damaged due to impact is greatly reduced, and the service lives of the filter element 120 and the filter 100 are effectively prolonged. Meanwhile, the oil inlet 111 is lower than the oil outlet 112 in the vertical direction, and the raw oil flows from bottom to top, so that the impurities mixed in the raw oil are precipitated spontaneously, the filtering load is reduced, the filtering effect is improved, and the service life of the filter element 120 is prolonged.
The utility model discloses a specific embodiment, filter core 120 includes support skeleton 121 and filter screen 122, and support skeleton 121 can support fixed filter screen 122 effectively, for the form of attaching filter screen 122 at the inner wall of first casing 110, greatly reduced filter screen 122 take place to drop and damaged possibility, and then ensured filter screen 122 job stabilization nature. Specifically, the filter screen 122 is wrapped around the support frame 121 and at the bottom thereof. The bottom end of the supporting framework 121 is higher than the bottom end of the first casing 110 by a preset height, so that the filter screen 122 coated at the bottom of the supporting framework 121 can participate in the filtering task, the surface area of the filter element 120 participating in the filtering is effectively increased, and the filtering efficiency is improved.
In a specific embodiment of the present invention, the filter element 120 further includes a plurality of magnetic rods 123, the axes of the plurality of magnetic rods 123 are all vertically disposed, and are all disposed inside the supporting frame 121 and are uniformly distributed around the axes of the supporting frame 121. By additionally arranging the magnetic rod 123, the magnetic rod 123 can effectively adsorb ferromagnetic impurities mixed in the crude oil, so that the filtering effect of the filter element 120 is further improved, and the production quality of carbon black is improved. Specifically, the number of the magnetic rods 123 is 4 to 10. The diameter of the end face of each magnetic rod 123 is 20-30mm, the axial length is 350-400mm, and the magnetic force is 8000 Tesla.
In one embodiment of the present invention, the supporting frame 121 includes a vertical rod 1211, a lower fixing ring 1212, a lower cross rod 1213, a middle fixing ring 1214, a middle cross rod 1215, an upper fixing ring 1216, and an upper cross rod 1217. The lower fixing ring 1212 is disposed at the lower portion of the upright 1211, and the plane is perpendicular to the axis of the upright 1211. The lower horizontal bars 1213 are uniformly distributed around the axis of the vertical rod 1211, and have one end fixedly connected to the lower portion of the vertical rod 1211 and the other end fixedly connected to the inner side of the lower fixing ring 1212. The middle fixing ring 1214 is disposed in the middle of the upright 1211 in a plane perpendicular to the axis of the upright 1211. The plurality of middle cross bars 1215 are uniformly distributed around the axis of the upright 1211, one end of each middle cross bar 1215 is fixedly connected with the middle part of the upright 1211, and the other end of each middle cross bar 1215 is fixedly connected with the inner side of the middle fixing ring 1214. The upper retaining ring 1216 is looped over the upright 1211 in a plane perpendicular to the axis of the upright 1211. The upper traverse bars 1217 are uniformly distributed around the axis of the vertical rod 1211, and have one end fixedly connected to the upper portion of the vertical rod 1211 and the other end fixedly connected to the inner side of the upper fixing ring 1216. The filter screen 122 covers the bottom of the lower retaining ring 1212, the outside of the middle retaining ring 1214, and the outside of the upper retaining ring 1216. The lower portion of each magnetic rod 123 is fixedly connected to the inner side of the lower fixing ring 1212, the middle portion thereof is fixedly connected to the inner side of the middle fixing ring 1214, and the upper portion thereof is fixedly connected to the inner side of the upper fixing ring 1216. On the whole, the structural stability of the supporting framework 121 is high, collapse is not easy to occur, and the magnetic rod 123 and the filter screen 122 are effectively supported.
In an embodiment of the present invention, the raw oil filter 100 for carbon black production further includes a second housing 130. The second shell 130 is a hollow structure, the inside of the second shell 130 is a slag storage cavity, the top of the second shell is connected with the bottom of the first shell 110, so that the slag storage cavity is communicated with the filter cavity, and the bottom of the second shell is provided with a slag outlet 131. Wherein, the sediment chamber can temporarily store the impurity that deposits down. The slag hole 131 is convenient for discharge the precipitated impurities in time, avoids the impurities from being mixed into the raw oil again, and improves the impurity removal effect.
In an embodiment of the present invention, the second housing 130 is of a V-shaped cross-section, which is favorable for collecting deposited oil residue and other impurities at the position of the slag-removing opening, thereby improving the slag-removing efficiency.
In an embodiment of the present invention, the inner wall of the middle portion of the first casing 110 is provided with a bearing ring, and the plane of the bearing ring is perpendicular to the axis of the first casing 110. The top of filter core 120 is equipped with the overlap joint ring, and the bottom of overlap joint ring closely laminates with the top of bearing ring. The bearing ring cooperates with the lap ring to provide greater stability in the position of the filter element 120. It should be noted that the overlapping ring can be a part of the supporting framework 121, fixedly connected to the upper fixing ring 1216, or formed by bending the top end of the filter screen 122 outwards. In addition, the lap-joint ring and the bearing ring can be detachably connected, so that the filter element 120 can be conveniently detached, replaced, installed and used.
In an embodiment of the present invention, the raw oil filter 100 for carbon black production further includes a cover cap, the cover cap is disposed on the top end of the first casing 110, and can seal the top end opening of the first casing 110, so as to prevent impurities from entering the filter cavity from the top end opening of the first casing 110. Specifically, a connecting flange is disposed at the top end of the first housing 110, and the edge of the cover is fixedly connected to the connecting flange. The connecting flange effectively increases the contact area when the first housing 110 is connected to the cover, thereby improving the connection stability.
Referring to fig. 6, the utility model also provides a raw oil filtration system is used in carbon black production, including the filter 100 that any embodiment of the aforesaid provided, inlet valve 200, oil feed manometer 300, outlet valve 400, outlet pressure gauge 500 and the valve 700 of slagging tap. Wherein, the input end of the oil inlet valve 200 is communicated with the oil inlet pressure gauge 300, and the output end is communicated with the oil inlet 111 of the first housing 110. The oil feed valve 200 can control whether the oil inlet 111 is open. The input end of the oil outlet valve 400 is communicated with the oil outlet 112 of the first housing 110, and the output end is communicated with the oil outlet pressure gauge 500. The oil outlet valve 400 can control whether the oil outlet 112 is opened or not. The input of the tap valve 700 communicates with the tap hole 131. The slag valve 700 can control whether the slag hole 131 is opened or not. It should be noted that, when the filter 100 performs a filtering task, the tapping valve 700 is in a closed state, and the oil outlet valve 400 and the oil inlet valve 200 are in an open state. Through the numerical value of contrast oil feed manometer 300 and oil outlet manometer 500, can in time know whether filter 100 takes place to block up, improve the security of operation.
In an embodiment of the present invention, the raw oil filtering system for carbon black production further includes an air intake valve 600, and an output end of the air intake valve 600 is communicated with the oil outlet 112 of the first housing 110. When the filter 100 is found to be blocked, the cover does not need to be opened for cleaning, and the filter element 120 does not need to be replaced frequently, so that the cleaning cost is reduced. Meanwhile, potential safety hazards caused by cleaning are reduced. Only need close out oil valve 400 and inlet valve 300 to open admission valve 600 and the back of slagging tap 700, input steam to the filter chamber in through the input of admission valve 600, use steam to carry out steam purging to the inside of first casing 110, the inside of second casing 130 and filter core 120 can. And the steam-swept debris can be discharged through the slag outlet 131. Overall, the cleaning difficulty is greatly reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," "one specific embodiment," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can equally replace or change the technical solution and the inventive concept of the present invention within the scope of the present invention.
Claims (10)
1. A raw oil filter for carbon black production, comprising:
a first housing and a filter element;
the first shell is hollow, the interior of the first shell is a filter cavity, the lower part of the first shell is provided with an oil inlet, and the upper part of the first shell is provided with an oil outlet;
the filter element is hollow and is arranged in the filter cavity, and the top end of the filter element is of an open structure;
raw oil flows into the filter cavity from the oil inlet, sequentially passes through the outside of the filter element, the inside of the filter element and the top end opening of the filter element, and then flows out of the oil outlet.
2. The raw oil filter for carbon black production according to claim 1, wherein the filter element includes a support skeleton and a filter screen;
the bottom end of the supporting framework is higher than the bottom end of the first shell by a preset height;
the filter screen is coated on the periphery and the bottom of the support framework.
3. The raw oil filter for carbon black production according to claim 2, wherein the filter element further comprises a magnetic rod;
the bar magnet is a plurality of, and the equal vertical setting of axis all locates support chassis's inside, and wind support chassis's axis evenly distributed.
4. The raw oil filter for carbon black production according to claim 3, wherein the supporting frame comprises vertical rods, lower fixing rings, lower cross rods, middle fixing rings, middle cross rods, upper fixing rings and upper cross rods;
the lower fixing ring is arranged at the lower part of the upright rod, and the plane of the lower fixing ring is vertical to the axis of the upright rod;
the lower transverse rods are uniformly distributed around the axis of the vertical rod, one end of each lower transverse rod is fixedly connected with the lower part of the vertical rod, and the other end of each lower transverse rod is fixedly connected with the inner side of the lower fixing ring;
the middle fixing ring is arranged in the middle of the upright rod, and the plane of the middle fixing ring is vertical to the axis of the upright rod;
the middle cross rods are uniformly distributed around the axis of the vertical rod, one ends of the middle cross rods are fixedly connected with the middle part of the vertical rod respectively, and the other ends of the middle cross rods are fixedly connected with the inner side of the middle fixing ring respectively;
the upper fixing ring is arranged at the upper part of the upright stanchion, and the plane of the upper fixing ring is vertical to the axis of the upright stanchion;
the upper transverse rods are uniformly distributed around the axis of the vertical rod, one end of each upper transverse rod is fixedly connected with the upper part of the vertical rod, and the other end of each upper transverse rod is fixedly connected with the inner side of the upper fixing ring;
the filter screen is coated at the bottom of the lower fixing ring, the outer side of the middle fixing ring and the outer side of the upper fixing ring;
the lower part of each magnetic rod is fixedly connected with the inner side of the lower fixing ring, the middle part of each magnetic rod is fixedly connected with the inner side of the middle fixing ring, and the upper part of each magnetic rod is fixedly connected with the inner side of the upper fixing ring.
5. The raw oil filter for carbon black production according to any one of claims 1 to 4, further comprising a second housing;
the second shell is hollow, a slag storage cavity is formed in the second shell, the top of the second shell is connected with the bottom of the first shell, so that the slag storage cavity is communicated with the filtering cavity, and a slag outlet is formed in the bottom of the second shell.
6. The feedstock oil filter for carbon black production according to claim 5, wherein a cross section of the second casing in the axial direction has a V-shaped structure.
7. The raw oil filter for carbon black production according to any one of claims 1 to 4, wherein a load-bearing ring is provided on an inner wall of the middle portion of the first housing, and a plane on which the load-bearing ring is located is perpendicular to an axis of the first housing;
the top end of the filter element is provided with a lap joint ring;
the bottom end of the lapping ring is tightly attached to the top end of the bearing ring.
8. The raw oil filter for carbon black production according to any one of claims 1 to 4, further comprising a cap;
the sealing cover is arranged at the top end of the first shell.
9. A raw oil filtration system for carbon black production, comprising the filter, the oil inlet valve, the oil inlet pressure gauge, the oil outlet valve and the oil outlet pressure gauge according to any one of claims 1 to 8;
the input end of the oil inlet valve is communicated with the oil inlet pressure gauge, and the output end of the oil inlet valve is communicated with the oil inlet of the first shell;
the input end of the oil outlet valve is communicated with the oil outlet of the first shell, and the output end of the oil outlet valve is communicated with the oil outlet pressure gauge.
10. The raw oil filtration system for carbon black production according to claim 9, further comprising an intake valve;
the output end of the air inlet valve is communicated with the oil outlet of the first shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696581.7U CN217431095U (en) | 2022-03-28 | 2022-03-28 | Raw oil filter and filtration system for carbon black production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696581.7U CN217431095U (en) | 2022-03-28 | 2022-03-28 | Raw oil filter and filtration system for carbon black production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217431095U true CN217431095U (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220696581.7U Active CN217431095U (en) | 2022-03-28 | 2022-03-28 | Raw oil filter and filtration system for carbon black production |
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| Country | Link |
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| CN (1) | CN217431095U (en) |
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- 2022-03-28 CN CN202220696581.7U patent/CN217431095U/en active Active
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