CN218411343U - Liquid level control valve assembly and liquid storage tank - Google Patents
Liquid level control valve assembly and liquid storage tank Download PDFInfo
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- CN218411343U CN218411343U CN202221059211.9U CN202221059211U CN218411343U CN 218411343 U CN218411343 U CN 218411343U CN 202221059211 U CN202221059211 U CN 202221059211U CN 218411343 U CN218411343 U CN 218411343U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model discloses a liquid level control valve assembly and liquid reserve tank, include: one end of the water inlet pipe is communicated with a water source, and the other end of the water inlet pipe is communicated with the liquid storage tank; the liquid level control valve is arranged on the water inlet pipe and is close to the water source; the float valve is arranged in the liquid storage tank and is used for controlling the opening and the closing of the liquid level control valve; a liquid level height scale for displaying a liquid level value of an actual liquid level L of the liquid storage tank; the fixed guide pipe is arranged on the inner side wall of the liquid storage tank, and the axial direction of the fixed guide pipe is vertical to the liquid level in the liquid storage tank; the first end of the hose is connected with the liquid level control valve, the second end of the hose sequentially penetrates through the liquid level height scale, and the side wall of the liquid storage tank and the fixed conduit are connected with the ball float valve; through the high value between the port of the second end of adjusting the hose and the liquid reserve tank bottom to adjust the height that the ball-cock assembly set up, and then adjust the liquid volume of the required storage of liquid reserve tank. The utility model discloses have the liquid volume of adjusting required storage in the liquid reserve tank under the condition of practicing thrift the cost.
Description
Technical Field
The utility model relates to the field of valve machinery, in particular to liquid level control valve assembly and liquid reserve tank.
Background
At present, water storage tanks (a water storage tank or a liquid storage tank or a water storage tank) are used in many occasions and are used for storing domestic water or required liquid and the like, particularly, large water storage tanks are often arranged on the tops of high-rise buildings and basements for supplying water to the high-rise buildings, and the large water storage tanks store the domestic water for users in the buildings.
In a water storage tank, the liquid level control often uses a ball float valve to control the height of the water level, however, the maximum storage volume of the water storage tank is fixed, as shown in fig. 1, the prior art liquid level control valve assembly includes: one end of the water inlet pipe 20 is communicated with the top end of the water storage tank 10, and the other end is communicated with a corresponding water source; a ball float 23 disposed inside the water storage tank 10; and a liquid level control valve 21 disposed on the water inlet pipe 20 and near an inlet of the water inlet pipe 20. The float valve 23 comprises a float ball and a connecting rod 24, and the float ball always floats on the liquid level; one end of the connecting rod is connected with the floating ball, and the other end of the connecting rod penetrates through the side wall of the water storage tank 10 and is connected with the liquid level control valve 21. When the liquid level of the float valve 23 is lower than the preset liquid level Lc of the water storage tank 10, the float valve 23 controls the liquid level control valve 21 to open, so that water or other corresponding liquid flows into the water storage tank 10 through the water inlet pipe 20 until the liquid level in the water storage tank 10 rises to the preset liquid level Lc, the float valve 23 controls the liquid level control valve 21 to close, and then water or other corresponding liquid does not flow into the water storage tank 10 any more. The level control valve assembly also includes a redundant valve 22, which remains normally open.
Therefore, the height of the stored liquid level (namely the preset liquid level Lc of the water storage tank) cannot be adjusted after the existing liquid level control valve assembly is constructed and installed, namely the volume of the existing liquid level control valve assembly is constant and cannot be adjusted. In addition, in the engineering, if the cost is high when the size structure of a water storage tank, a water tank or a liquid storage tank is changed, a plurality of water storage tanks with different volumes cannot be arranged at any time along with the change of the water storage volume.
However, in real life, the requirement of the change of the volume of the water pool and the like is always met, if people pay attention to the quality of drinking water, the storage time of domestic water is not expected to be too long, the water consumption in summer is much larger than that in winter, and the design is used for storing water according to the most unfavorable condition. When the water consumption is low in winter, the water stored in the water tank is longer in residence time, so that the volume of the water storage tank needs to be adjusted, the water storage volume in the water tank needs to be adjusted in some designs, but the setting cost is increased, and the problem cannot be solved under the condition of reducing the cost at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a liquid level control valve assembly and liquid reserve tank for it is fixed to solve current liquid reserve tank volume, and the liquid level of liquid reserve tank can not be adjusted at will the problem.
In order to solve the above problem, the utility model discloses a following technical scheme realizes:
a level control valve assembly for use in a fluid reservoir, comprising: one end of the water inlet pipe is communicated with a water source, and the other end of the water inlet pipe is communicated with the liquid storage tank; the liquid level control valve is arranged on the water inlet pipe and is close to the water source; the float valve is arranged in the liquid storage tank and is used for controlling the opening and the closing of the liquid level control valve; the liquid level height scale is used for displaying the liquid level value of the actual liquid level L of the liquid storage tank; the fixed guide pipe is arranged on the inner side wall of the liquid storage tank, and the axial direction of the fixed guide pipe is vertical to the liquid level in the liquid storage tank; the first end of the hose is connected with the liquid level control valve, the second end of the hose sequentially penetrates through the liquid level height scale, and the side wall of the liquid storage tank and the fixed conduit are connected with the ball float valve; the height of the ball float valve is adjusted by adjusting the height value between the port of the second end of the hose and the bottom of the liquid storage tank, and then the liquid amount required to be stored in the liquid storage tank is adjusted.
Optionally, the fixing guide pipe is fixed on the inner side wall of the liquid storage tank by a plurality of fixing bolts.
Optionally, a notch is formed in the side wall of the fixed guide pipe, and the notch extends along the axial direction of the fixed guide pipe; the section of the fixed conduit is semicircular, and the ball float valve is connected with the second end port of the hose in the fixed conduit through the gap.
Optionally, the liquid level height scale is hollow, and a side wall of the liquid level height scale is provided with a scale, wherein the scale represents a liquid level difference between a lowest liquid level L2 of the liquid storage tank and a highest liquid level L1 of the liquid storage tank; a plurality of positioning notches are arranged on the side wall of the other side at intervals and run through the fixing piece, the positioning notches are realized right, so that the hose in the liquid level height scale is fixed, and the hose stretches into the liquid storage tank to be adjusted in length.
Optionally, the fixing part comprises a plug, a positioning connecting rod and a clamp, the plug is connected with the clamp through the positioning connecting rod, the clamp is used for fixing the hose, the positioning connecting rod is arranged on the corresponding positioning notch, and the scale of the liquid level height scale corresponding to the clamp is the liquid level value of the actual liquid level L of the liquid storage tank; wherein, the liquid level value of the lowest liquid level L2 is less than or equal to the liquid level value of the actual liquid level L and is less than or equal to the liquid level value of the highest liquid level L1.
Optionally, the method further comprises: the sleeve is arranged on the side wall of the liquid storage tank and is positioned between the highest liquid level L1 of the liquid storage tank and the top wall of the liquid storage tank; the second end of the hose penetrates through the sleeve and enters the liquid storage tank.
Optionally, the method further comprises: the roller is arranged outside the liquid storage tank, the hose is wound on the roller, and the roller is rotated to adjust the length of the hose.
Optionally, the method further comprises: a valve disposed on the hose.
On the other hand, the utility model also provides a liquid reserve tank, include: a fluid level control valve assembly as hereinbefore described.
The utility model discloses one of following advantage has at least:
the utility model discloses can utilize and increase the adjusting part of relevant ball-cock assembly height on the original liquid level control valve, form a liquid level control valve subassembly of adjustable liquid level height. The liquid storage volume of the solution capable of being stored in the liquid storage tank can be adjusted, the liquid storage tanks with different volumes do not need to be repeatedly arranged, and therefore the cost for adjusting the volume of the liquid storage tanks and replacing the liquid storage tanks is saved. The adjusting method also has the advantages of simplicity, convenience and quickness. And the adjustment of the liquid level in the liquid storage tank is beneficial to reducing the retention time of liquid in the liquid storage tank, and particularly for a domestic drinking water system, the assembly can adjust the age of the building water, so that the sanitation and safety of the water quality are improved.
Drawings
FIG. 1 is a schematic diagram of the principal structure of a prior art fluid level control valve assembly;
fig. 2 is a schematic diagram of a main structure of a liquid level control valve assembly according to an embodiment of the present invention;
fig. 3 is a schematic top view of a stationary pipe in a fluid level control valve assembly according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a liquid level height scale in a liquid level control valve assembly according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a liquid level height scale in a liquid level control valve assembly according to an embodiment of the present invention.
Detailed Description
The liquid level control valve assembly and the liquid storage tank according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.
As shown in fig. 2, the utility model provides a liquid level control valve assembly, it is applied to in the liquid reserve tank 1, include: a water inlet pipe 2, one end of which is communicated with a water source, and the other end of which is communicated with the liquid storage tank 1 (in the embodiment, the water inlet pipe 2 can be communicated with the inside of the liquid storage tank 1 through a top cover or a side wall of the liquid storage tank 1); a liquid level control valve 3 disposed on the water inlet pipe 2 and disposed close to the water source; a float valve 6 disposed in the liquid storage tank 1, the float valve 1 being used for controlling the liquid level control valve 3 to open and close; a liquid level height scale 9 for displaying a liquid level value of an actual liquid level L of the liquid storage tank; the fixed guide pipe 8 is arranged on the inner side wall of the liquid storage tank 1, and the axial direction of the fixed guide pipe is vertical to the liquid level in the liquid storage tank 1; a hose 7, a first end of which is connected with the liquid level control valve 3, a second end of which sequentially penetrates through the liquid level height scale 9, and the side wall of the liquid storage tank 1 and the fixed conduit 8 are connected with the ball float valve 6; through adjusting the height value between the port of the second end of the hose 7 and the bottom of the liquid storage tank 1 (the bottom of the liquid storage tank 1, specifically, the inner bottom of the liquid storage tank 1) to adjust the height of the float valve 6 (located at the actual liquid level L of the liquid storage tank), the liquid amount (actual liquid storage amount or volume) required to be stored in the liquid storage tank 1 is further adjusted.
In this embodiment, the method further includes: a plurality of fixing bolts 12, a plurality of fixing bolts 12 are arranged on the fixing guide pipe 8 at intervals, and each fixing bolt 12 penetrates through the side wall of the fixing guide pipe 8 to fix the fixing guide pipe 8 on the inner side wall of the liquid storage tank 1. The utility model discloses also can be through fixing bolt 12 will fixed pipe 8 welding is in on the inside wall of liquid reserve tank 1. In the present embodiment, the number of the fixing bolts 12 may be two, but the present invention is not limited thereto.
In this embodiment, as shown in fig. 3, a notch 80 is formed on a side wall of the fixed guide tube 8, and the notch 80 extends along an axial direction of the fixed guide tube 8; the section of the fixed conduit 8 is semicircular, and the ball float valve 6 is connected with the second end port of the hose 7 in the fixed conduit 8 through the gap. The aperture of the notch 80 is smaller than the diameter of the hose 7.
In this embodiment, as shown in fig. 4 and 5, the liquid level height scale 9 is hollow, and a scale 90 is disposed on a side wall of the liquid level height scale 9, where the scale 90 represents a liquid level difference between a lowest liquid level L2 of the liquid storage tank and a highest liquid level L1 of the liquid storage tank; opposite side lateral wall interval is equipped with a plurality of location breach 91, runs through mounting 13 location breach 91 realizes right hose in the liquid level altitude scale 9 is fixed, in order to right hose 7 stretches into extremely the length part of liquid reserve tank 1 is adjusted. The length of the fixed conduit 8 is then greater than the liquid level difference between the lowest liquid level L2 of the liquid storage tank and the highest liquid level L1 of the liquid storage tank.
In this embodiment, the whole of liquid level altitude scale 9 is the cuboid form, and it can only set up adjacent and three perpendicular of mutually perpendicular, and one of them two mutual perpendicular planes sets up scale 90, and another face sets up location breach 91, the hose runs through the top surface (the top surface can set up a through-hole 92, the diameter of through-hole 92 is greater than the pipe diameter of hose 7, hose 7 can reciprocate in the through-hole 92), the extending direction of hose 7 scale 90 is the same with the array direction of a plurality of location breach 91.
Referring to fig. 5, in this embodiment, the fixing member 13 includes a plug 132, a positioning connecting rod 131 and a clamp 130, the plug 132 is connected to the clamp 130 through the positioning connecting rod 131, the clamp 130 is sleeved on an outer side wall of the hose 7 for fixing the hose 7, the positioning connecting rod 131 is disposed on the corresponding positioning notch 91, and a scale 91 of the liquid level height scale corresponding to the clamp 130 is a liquid level value of an actual liquid level L of the liquid storage tank 1; wherein, the liquid level value of the lowest liquid level L2 is less than or equal to the liquid level value of the actual liquid level L and is less than or equal to the liquid level value of the highest liquid level L1.
As shown in fig. 1, the present embodiment further includes: the sleeve 10 is arranged on the side wall, close to the liquid storage tank 1, of the liquid storage tank 1 and is located between the highest liquid level L1 of the liquid storage tank and the top wall of the liquid storage tank. The second end of the hose 7 penetrates the sleeve 10 and enters the liquid storage tank 1.
As shown in fig. 1, the present embodiment further includes: and a roller 11 disposed outside the reservoir tank 1, the hose 7 being wound around the roller 11, the roller 11 being rotated to adjust the length of the hose 7. In this embodiment, the roller 11 has a first function of receiving the hose 7 and a second function of adjusting the length of the hose 7.
As shown in fig. 1, the present embodiment further includes: a valve 5 disposed on the hose 7. The valve 5 is normally open, and when the liquid level control valve assembly in the present embodiment is out of order and needs to be repaired, the valve 5 needs to be closed, and then all the parts which are out of order are repaired and replaced.
In this embodiment, the valve 5 and the liquid level control valve 3 are connected by a hard pipe 4, but the present invention is not limited thereto. The hose 7 may be made of stainless steel or plastic, but the present invention is not limited thereto, as long as it has sufficient flexibility to realize bending or bending.
On the other hand, please continue to refer to fig. 1 and 5, the present invention further provides a liquid storage tank 1, including: a fluid level control valve assembly as hereinbefore described.
In this embodiment, the highest liquid level L1 that liquid reserve tank 1 was equipped with is actually located or is close to the top of liquid reserve tank, the minimum liquid level L2 that liquid reserve tank 1 was equipped with is actually located or is close to the bottom of liquid reserve tank (or be less than the position of maximum liquid level L1 can), and maximum liquid level L1 is in when carrying out scale display on the liquid level altitude scale 9, it is located the bottom of liquid level altitude scale 9, and minimum liquid level L2 is in when carrying out scale display on the liquid level altitude scale 9, it is located the top of liquid level altitude scale 9. The length of the hose 7 in the liquid storage tank 1 is adjusted to adjust the liquid level value of the actual liquid level (required liquid level or preset liquid level) L.
When the liquid amount of the liquid required to be stored in the liquid storage tank 1 needs to be adjusted, the liquid amount can be adjusted by adjusting the required liquid level L in the liquid storage tank 1 due to the fixed shape of the liquid storage tank 1.
For example, the length of the hose 7 in the liquid storage tank 1 is adjusted to a corresponding length, and then the ball float valve 6 is located at a required liquid level L, or when the solution enters the liquid storage tank 1 from the water inlet pipe 2 until the solution reaches the required liquid level L, the ball float valve 6 can control the liquid level control valve 3 to close, thereby achieving the purpose of adjusting the amount of the liquid stored in the liquid storage tank 1.
When the liquid storage amount in the liquid storage tank 1 does not need to be reduced, the length of the hose 7 in the liquid storage tank 1 is reduced, so that the ball float valve 6 can be located at the highest liquid level L1 of the liquid storage tank 1, and therefore when the liquid level of the solution in the liquid storage tank 1 reaches the highest liquid level L1, the ball float valve 6 controls the liquid level control valve 3 to be closed. It can be understood that, when the liquid level in the liquid storage tank 1 does not reach the set liquid level, the float valve 6 controls the liquid level control valve 3 to keep the open state.
In this embodiment, the liquid storage tank may be domestic water stored at a high level, a water storage tank in an exhibition building, a landscape pool, or the like.
In summary, the present embodiment can utilize the original liquid level control valve to add the adjusting component of the installation height of the float valve, so as to form a liquid level control valve component with adjustable liquid level height. The liquid storage volume of the solution capable of being stored in the liquid storage tank can be adjusted, the liquid storage tanks with different volumes do not need to be repeatedly arranged, and therefore the cost for adjusting the volume of the liquid storage tanks and replacing the liquid storage tanks is saved. The adjusting method also has the advantages of simplicity, convenience and quickness. And the adjustment of the liquid level in the liquid storage tank is beneficial to reducing the retention time of liquid in the liquid storage tank, and particularly for a domestic drinking water system, the assembly can adjust the age of the building water, so that the sanitation and safety of the water quality are improved.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, it is to be understood that the terms "center", "height", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being 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. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" 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 relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (9)
1. A level control valve assembly for use in a liquid storage tank, comprising: one end of the water inlet pipe is communicated with a water source, and the other end of the water inlet pipe is communicated with the liquid storage tank;
the liquid level control valve is arranged on the water inlet pipe and is close to the water source;
the float valve is arranged in the liquid storage tank and is used for controlling the opening and the closing of the liquid level control valve;
the liquid level height scale is used for displaying the liquid level value of the actual liquid level L of the liquid storage tank;
the fixed guide pipe is arranged on the inner side wall of the liquid storage tank, and the axial direction of the fixed guide pipe is vertical to the liquid level in the liquid storage tank;
the first end of the hose is connected with the liquid level control valve, the second end of the hose sequentially penetrates through the liquid level height scale, and the side wall of the liquid storage tank and the fixed conduit are connected with the ball float valve;
the height of the ball float valve is adjusted by adjusting the height value between the port of the second end of the hose and the bottom of the liquid storage tank, and then the liquid amount required to be stored in the liquid storage tank is adjusted.
2. The fluid level control valve assembly as recited in claim 1 wherein a plurality of retaining bolts are provided to retain said retaining conduit to an interior side wall of said tank.
3. The fluid level control valve assembly as recited in claim 2 wherein the fixed conduit has a notch formed in a sidewall thereof, the notch extending in an axial direction of the fixed conduit; the section of the fixed conduit is semicircular, and the ball float valve is connected with the second end port of the hose in the fixed conduit through the notch.
4. The liquid level control valve assembly as claimed in any one of claims 1 to 3, wherein the liquid level height scale is hollow inside, and a side wall of the liquid level height scale is provided with a scale indicating a liquid level difference between a lowest liquid level L2 of the liquid storage tank and a highest liquid level L1 of the liquid storage tank; a plurality of positioning notches are arranged on the side wall of the other side at intervals; run through the mounting location breach realize right hose in the liquid level altitude scale is fixed, in order to right the hose stretches into extremely the length of liquid reserve tank is adjusted.
5. The liquid level control valve assembly as claimed in claim 4, wherein the fixing member comprises a plug, a positioning connecting rod and a clamp, the plug is connected with the clamp through the positioning connecting rod, the clamp is used for fixing the hose, the positioning connecting rod is arranged on the corresponding positioning gap, and the scale of the liquid level height scale corresponding to the clamp is the liquid level value of the actual liquid level L of the liquid storage tank; wherein, the liquid level value of the lowest liquid level L2 is less than or equal to the liquid level value of the actual liquid level L and is less than or equal to the liquid level value of the highest liquid level L1.
6. The fluid level control valve assembly as recited in claim 5, further comprising: the sleeve is arranged on the side wall of the liquid storage tank and is positioned between the highest liquid level L1 of the liquid storage tank and the top wall of the liquid storage tank; the second end of the hose penetrates through the sleeve and enters the liquid storage tank.
7. The fluid level control valve assembly as recited in claim 6, further comprising: the roller is arranged outside the liquid storage tank, the hose is wound on the roller, and the roller is rotated to adjust the length of the hose.
8. The fluid level control valve assembly as recited in claim 7, further comprising: a valve disposed on the hose.
9. A liquid storage tank, comprising: a fluid level control valve assembly as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221059211.9U CN218411343U (en) | 2022-04-22 | 2022-04-22 | Liquid level control valve assembly and liquid storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221059211.9U CN218411343U (en) | 2022-04-22 | 2022-04-22 | Liquid level control valve assembly and liquid storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218411343U true CN218411343U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221059211.9U Active CN218411343U (en) | 2022-04-22 | 2022-04-22 | Liquid level control valve assembly and liquid storage tank |
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| Country | Link |
|---|---|
| CN (1) | CN218411343U (en) |
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2022
- 2022-04-22 CN CN202221059211.9U patent/CN218411343U/en active Active
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