CN223563478U - Low water loss pipe force valve - Google Patents
Low water loss pipe force valveInfo
- Publication number
- CN223563478U CN223563478U CN202422774621.7U CN202422774621U CN223563478U CN 223563478 U CN223563478 U CN 223563478U CN 202422774621 U CN202422774621 U CN 202422774621U CN 223563478 U CN223563478 U CN 223563478U
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- valve
- cavity
- control
- control rod
- movable
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Abstract
The utility model discloses a low-water-loss pipe force valve which comprises a valve body, a control assembly, a control component, an elastic component and a stroke end position, wherein the valve body is provided with a flow passage, the control assembly is used for limiting a control cavity, a movable component capable of moving up and down is arranged in the control cavity, the control cavity is divided into an upper cavity and a lower cavity which are mutually independent by the movable component, the lower cavity and the upper cavity are respectively communicated with a water inlet end and a water outlet end of the flow passage, the pressure receiving area of the movable component facing the upper cavity is smaller than the pressure receiving area facing the lower cavity, the control rod is movably arranged on the valve body in a lifting mode, the top end of the control rod is connected with the movable component, the elastic component is arranged in the upper cavity and used for driving the movable component to descend, and when the pressures of the upper cavity and the lower cavity are equal, the movable component ascends to the stroke end position. According to the low water damage pipe force valve, the control rod can be lifted to the highest position, so that the valve body can keep the maximum opening degree, and the water damage of the valve is reduced.
Description
Technical Field
The utility model relates to the technical field of pipe force valves, in particular to a low-water-loss pipe force valve.
Background
The pipe force valve applied to the water pump outlet is generally provided with a control rod, the top of the control rod is provided with an upper control cavity and a lower control cavity, the volume change of the upper control cavity and the lower control cavity drives the control rod to lift so as to realize the functions of slowly opening and slowly closing the valve, and the upper control cavity is used as a rodless cavity and the lower control cavity is used as a rod cavity, so that the effective acting area of the upper control cavity is generally larger than that of the lower control cavity, and the downward acting force of the upper control cavity is larger than that of the lower control cavity when the valve is opened and operated, and meanwhile, the gravity of the control rod, the small valve plate and other components is superposed, so that the control rod cannot be lifted to the highest position, the opening of the valve is pressed, and the water loss of the valve is increased.
Disclosure of utility model
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the low-water-loss pipe force valve, and under the condition that the pressures of the upper control cavity and the lower control cavity are consistent, the control rod can be ensured to be lifted to the highest position, so that the valve can keep the maximum opening degree, and the water loss of the valve is reduced.
According to an embodiment of the first aspect of the utility model, a low water damage plumbing valve comprises:
A valve body having a flow passage;
The control assembly is arranged on the valve body, a control cavity is defined by the control assembly, a movable piece is arranged in the control cavity, the movable piece is movably arranged in the control cavity in a lifting manner, the control cavity is divided into an upper cavity and a lower cavity which are mutually independent, the lower cavity is communicated with the water inlet end of the flow passage, the upper cavity is communicated with the water outlet end of the flow passage, the compression area of the movable piece facing the upper cavity is S 1, the compression area of the movable piece facing the lower cavity is S 2, and the requirements are met by S 1＜S2;
The top end of the control rod extends into the lower cavity to be connected with the movable piece;
The elastic piece is arranged in the upper cavity, the top end of the elastic piece is propped against the inner wall of the upper cavity, and the bottom end of the elastic piece is propped against the movable piece;
When the pressures of the upper chamber and the lower chamber are equal, the movable piece rises to a stroke end position.
The low water damage pipe force valve provided by the embodiment of the utility model has at least the following beneficial effects:
Through setting the pressurized area of moving part towards last cavity to be less than the pressurized area of moving part towards lower cavity for even under the elastic component that sets up in the last cavity had the effort that promotes moving part decline the condition, also can ensure when the pressure of last cavity, lower cavity is equal, the moving part can rise to stroke end position, consequently the control lever that is connected with the moving part also can rise to stroke end position equally, and then the position when making the valve full open is higher, has reduced the excessive valve water loss effectively.
According to some embodiments of the utility model, the elastic member applies force F to the movable member, and the gravity of the control rod is G, wherein F is more than or equal to 0.2G and less than or equal to 5G.
According to some embodiments of the utility model, a control rod is connected to one side of the movable part facing the lower chamber, a marking cylinder is connected to one side of the movable part facing the upper chamber, and the movable part can vertically lift to drive the control rod and the marking cylinder to synchronously lift;
The diameter of the marking cylinder is larger than that of the control rod, so that S 1＜S2 is achieved.
According to some embodiments of the utility model, the diameter of the marking cartridge is D1 and the diameter of the control rod is D2, wherein 1.1D 2≤D1≤3D2.
According to some embodiments of the utility model, the bottom end of the marking cylinder is connected with the movable part, the top end of the marking cylinder extends out of the upper cavity, the movable part can vertically lift to drive the marking cylinder to lift, and the elastic part is sleeved on the periphery of the marking cylinder.
According to some embodiments of the utility model, the marking cylinder comprises an outer shell and an inner shell, wherein the outer shell is sleeved on the periphery of the inner shell, scales are arranged on the periphery of the inner shell, and the outer shell is made of transparent materials.
According to some embodiments of the utility model, the top seal of the marking cartridge is provided.
According to some embodiments of the utility model, the top end of the marking cartridge is fitted with a bump.
According to some embodiments of the utility model, the low water loss tubular force valve further comprises:
the valve shaft is arranged on the valve body and partially penetrates through the flow passage;
The large valve plate is arranged on the flow passage and connected with the valve shaft, and the large valve plate and the valve shaft are eccentrically arranged; the large valve plate can rotate around the valve shaft to close the flow passage, and is provided with a through hole penetrating through the large valve plate;
The bottom of the control rod is hinged with the valve shaft through a connecting rod mechanism, and the movable piece can vertically lift to drive the control rod to lift;
the small valve plate is arranged on the connecting rod mechanism and is used for sealing the through hole of the large valve plate;
according to some embodiments of the utility model, the linkage mechanism comprises a first link and a second link, a first end of the first link in a length direction being hinged to a bottom end of the control rod, a second end of the first link in a length direction being hinged to a first end of the second link in a length direction, a second end of the second link in a length direction being hinged to the valve shaft;
The small valve plate is arranged at the joint of the first connecting rod and the second connecting rod.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic illustration of a position of a tube force valve in a closed state according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic illustration of the position of a tube force valve according to an embodiment of the present utility model during a valve opening process;
FIG. 4 is a schematic illustration of the position of a pipe force valve according to an embodiment of the present utility model in a fully open valve state;
FIG. 5 is a schematic illustration of the position of a tube force valve according to an embodiment of the present utility model during a valve closing process;
Fig. 6 is a schematic structural view of a piston tube force valve according to another embodiment of the present utility model.
Reference numerals:
a valve body 100, a through-flow channel 110, a water inlet end 111, a water outlet end 112 and a valve shaft 120;
The control assembly 200, the upper chamber 210, the elastic member 211, the marking cylinder 212, the lower chamber 220, the control rod 221 and the movable member 230;
large valve plate 300, through hole 310;
A linkage 400, a first link 410, a second link 420, and a small valve plate 430.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, plural means two or more. If a description is given of a first, the second is only used for distinguishing technical features, and is not to be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 6, a low water loss pipe force valve according to an embodiment of the present utility model includes a valve body 100, the valve body 100 having a flow passage 110, a valve seat disposed on an inner side wall of the flow passage 110 and separating the flow passage 110 into a water inlet end 111 and a water outlet end 112, a valve shaft 120 disposed on the water outlet end 112 of the valve body 100 and extending into the flow passage 110, a large valve plate 300 mounted in the flow passage 110 and capable of sealing connection with the valve seat to close the flow passage 110 and intercept communication between the water inlet end 111 and the water outlet end 112, the large valve plate 300 connected with the valve shaft 120 and disposed eccentrically with respect to the valve shaft 120, and specifically, a central axis of the valve shaft 120 is parallel to a central axis of the large valve plate 300 but not coincident with the central axes of the large valve plate 300. Large valve plate 300 is rotatable about valve shaft 120 to close or open flow passage 110.
Referring to fig. 1 and 2, a control assembly 200 is installed at the top of the water outlet end 112 of the valve body 100, the control assembly 200 defines a control chamber, a movable member 230 is installed in the control chamber, the movable member 230 is installed in the control chamber in a movable and liftable manner, specifically, fig. 1 shows a diaphragm type control assembly 200, wherein the movable member 230 is a diaphragm, and fig. 6 shows a piston type control assembly 200, wherein the movable member 230 is a piston plate. The movable member 230 divides the control chamber into an upper chamber 210 and a lower chamber 220 which are independent from each other, the lower chamber 220 is communicated with the water inlet end 111 of the through-flow channel 110, the upper chamber 210 is communicated with the water outlet end 112 of the through-flow channel 110, the upper chamber 210 is positioned above the movable member 230, the lower chamber 220 is positioned below the movable member 230, the upper chamber 210 and the lower chamber 220 are both closed chambers, the upper chamber 210 is communicated with the water outlet end 112 of the through-flow channel 110 through a bypass pipe, and the lower chamber 220 is communicated with the water inlet end 111 of the through-flow channel 110 through a bypass pipe, as shown in fig. 1 and 6.
Further, the pressure receiving area of the movable member 230 facing the upper chamber 210 is S 1, the pressure receiving area of the movable member 230 facing the lower chamber 220 is S 2, and S 1＜S2 is satisfied, specifically, the pressure receiving area of the movable member 230 facing the upper chamber 210 in this embodiment refers to the area where the upper surface of the movable member 230 contacts the medium in the upper chamber 210 when the upper chamber 210 is full of medium, the pressure receiving area of the movable member 230 facing the lower chamber 220 refers to the area where the lower surface of the movable member 230 contacts the medium in the lower chamber 220 when the lower chamber 220 is full of medium, and because of S 1＜S2, the area where the upper surface of the movable member 230 contacts the medium in the upper chamber 210 is smaller than the area where the lower surface contacts the medium in the lower chamber 220, then when the pressure of the medium in the upper chamber 210 and the lower chamber 220 is balanced, the movable member 230 will rise to the end-of-travel position when the pressure of the lower surface of the movable member 230 is equal. The low water damage pipe force valve of the present embodiment sets the pressure receiving area of the movable member 230 towards the upper chamber 210 smaller than the pressure receiving area of the movable member 230 towards the lower chamber 220, so that even if the elastic member 211 disposed in the upper chamber 210 has a force pushing the movable member 230 to descend, the movable member 230 can be ensured to be lifted to the stroke end position when the pressures of the upper chamber 210 and the lower chamber 220 are equal, therefore, the control lever 221 connected with the movable member 230 can be lifted to the stroke end position as well, and the valve is further made to be higher in the fully opened position, thereby effectively reducing the water damage of the valve.
In the embodiment of the present utility model, the control rod 221 is connected to the lower surface of the movable member 230, the marking cylinder 212 is connected to the upper surface of the movable member 230, and the diameter of the marking cylinder 212 is greater than that of the control rod 221, so that the pressure area of the movable member 230 towards the upper chamber 210 is S 1, which is smaller than the pressure area of the movable member 230 towards the lower chamber 220 is S 2. The marking cylinder 212 extends upwards to form an upper chamber 210, the control rod 221 extends downwards to form a lower chamber 220, and the movable part 230 can vertically lift to drive the marking cylinder 212 and the control rod 221 to synchronously lift. Since both the marking cylinder 212 and the control rod 221 have their own weights, when the pressure of the medium in the upper chamber 210 and the lower chamber 220 is balanced, the force of the pressure difference between the upper chamber 210 and the lower chamber 220 pushing the movable member 230 to rise needs to overcome at least the gravity of the marking cylinder 212, the control rod 221 and the movable member 230, so as to ensure that the pressure difference between the upper chamber 210 and the lower chamber 220 can push the movable member 230 to rise, and the pressure difference between the upper chamber 210 and the lower chamber 220 is not too large, so that the movable member 230 rises rapidly, preferably the diameter of the control rod 221 with the diameter of 1.1 to 2 times that of the marking cylinder 212, that is, the diameter of the marking cylinder 212 is set to D 1, and the diameter of the control rod 221 is set to D 2, wherein 1.1D 2≤D1≤3D2.
In the embodiment of the utility model, the marking cylinder 212 comprises an outer shell and an inner shell, wherein the outer shell is sleeved on the outer periphery of the inner shell, the outer periphery of the inner shell is provided with scales, and the outer shell is made of transparent materials. Specifically, as can be seen from the above, the top of the marking cylinder 212 extends out of the upper chamber 210, so that in order to facilitate observation of the specific opening of the low water damage pipe force valve in this embodiment, the marking cylinder 212 may be provided with a scale to facilitate observation of the specific opening of the pipe force valve. Since the marking cylinder 212 is to extend upwards out of the upper chamber 210 and ensure the sealing effect of the upper chamber 210, the outer peripheral wall of the marking cylinder 212 needs to be provided with a smooth surface, so that the marking cylinder 212 is provided with an outer shell and an inner shell, the outer shell is made of transparent materials, the opening degree of the tube force valve can be effectively observed, the sealing of the upper chamber 210 is ensured, and meanwhile, scale scratching is avoided.
It is conceivable that an opening scale may be provided outside the control chamber, and the valve opening may be displayed directly by lifting or lowering the marking cylinder 212.
In an embodiment of the present utility model, the top of the marking cylinder 212 is sealingly arranged, and a bump is mounted on the top end of the marking cylinder 212. Specifically, in order to protect the clarity of the scale of the inner housing in the marking cylinder 212 and also to avoid dirt, impurities, rainwater, etc. entering the marking cylinder 212 to cause contamination of the marking cylinder 212, it is preferable that the top of the marking cylinder 212 is sealed. The bump block is preferably made of metal material, and has higher hardness, so that the bump block has anti-knocking capability, and can be detachably connected with the top of the marking cylinder 212 in a threaded, fastening or other manner, so that the bump block can be replaced independently, and the maintenance cost is reduced. The bump is used for facilitating the knocking, and in the case of long-term use of the pipe force valve, the control rod 221 may be blocked and difficult to descend, and in this case, the bump may be knocked to assist the control rod 221 to descend.
It is conceivable that the bump may be tapped periodically to reduce the probability of the lever 221 being stuck by foreign substances.
In the valve closing operation of the low water damage pipe force valve of the embodiment, in order to prevent the friction force among the marking cylinder 212, the control rod 221 and the control assembly 200 from affecting the descending of the control rod 221, the upper chamber 210 is further provided with an elastic member 211, as shown in fig. 2, the elastic member 211 is preferably a spring, the elastic member 211 is sleeved on the periphery of the marking cylinder 212, the top end of the elastic member 211 is abutted against the inner wall of the upper chamber 210, the bottom end of the elastic member 211 is abutted against the movable member 230, and the elastic member 211 is used for driving the movable member 230 to descend. In order to ensure that the force applied by the elastic member 211 to the movable member 230 overcomes the friction force applied by the marking cylinder 212 and the elastic member 211, it is preferable that the force applied by the elastic member 211 to the movable member 230 is F, and the gravity of the control lever 221 is G, wherein F is more than or equal to 0.2G and less than or equal to 5G.
In an embodiment of the present utility model, the bottom of the lever 221 is hinged to the valve shaft 120 by a linkage 400. The large valve plate 300 is provided with a through hole 310 penetrating the large valve plate 300, the small valve plate 430 is arranged on the connecting rod mechanism 400 and used for sealing the through hole 310, the connecting rod mechanism 400 comprises a first connecting rod 410 and a second connecting rod 420, a first end in the length direction of the first connecting rod 410 is hinged with the bottom end of the control rod 221, a second end in the length direction of the first connecting rod 410 is hinged with a first end in the length direction of the second connecting rod 420, a second end in the length direction of the second connecting rod 420 is hinged with the valve shaft 120, and the small valve plate 430 is arranged at the joint of the first connecting rod 410 and the second connecting rod 420.
The steps of the low water damage pipe force valve switch valve of the embodiment are as follows:
When the pipe force valve is in the fully closed state, referring to fig. 1, at this time, the movable member 230 is at the end position of the downward stroke, the small valve plate 430 seals the through hole 310, and the large valve plate 300 is in sealing connection with the valve seat in the through-flow channel 110, so as to close the through-flow channel 110 and intercept the communication between the water inlet end 111 and the water outlet end 112.
The tube force valve shown in fig. 4 is in a fully opened state, and when the tube force valve is switched from a fully closed state to a fully opened state, the tube force valve is in a state shown in fig. 3, taking fig. 3 as an example, when the medium flows from right to left, the large valve plate 300 is pushed to rotate around the valve shaft 120, meanwhile, the medium enters into the lower cavity 220 to push the movable part 230 to rise, and then drives the control rod 221 to rise, and the control rod 221 rises to synchronously drive the link mechanism 400 and the small valve plate 430 to act, so that the large valve plate 300 and the small valve plate 430 synchronously rise, and the small valve plate 430 cannot influence the large valve plate 300 to be opened to the position shown in fig. 4 because the movable part 230 can continuously rise to the stroke end position shown in fig. 4.
When the right end of the tube force valve loses the medium pressure, the large valve plate 300 can be quickly closed under the action of gravity, and at the moment, part of the backflow medium impacts the left side of the large valve plate 300 in the through passage 110, and meanwhile, the medium at the water outlet end 112 reversely enters into the upper chamber 210 to push the movable piece 230 to descend, but the descending speed of the movable piece 230 is far smaller than the closing speed of the large valve plate 300, so that the closing speed of the small valve plate 430 is obviously delayed, the state shown in fig. 5 is caused, and when the large valve plate 300 is in the closing state and the small valve plate 430 does not close the through hole 310, part of the backflow pressure medium can flow to the water inlet end 111 through the through hole 310, so that the destructive impact of the backflow pressure medium on the large valve plate 300 and the outlet pipeline is reduced, and the large valve plate 300 and the pipe network system are protected. The backflow pressure medium enters the upper chamber 210 through the bypass pipe to push the medium in the lower chamber 220 to flow back to the water inlet end 111 from the bypass pipe, so that the movable part 230 moves downwards under the combined action of the medium thrust and the elastic part 211, the control rod 221 and the small valve plate 430 connected with the control rod are enabled to move downwards to a position in sealing contact with the through hole 310 on the large valve plate 300, the valve is completely closed, and the valve returns to the position shown in fig. 1.
In the description of the present specification, a description referring to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A low water loss tubing force valve comprising:
A valve body having a flow passage;
The control assembly is arranged on the valve body, a control cavity is defined by the control assembly, a movable piece is arranged in the control cavity, the movable piece is movably arranged in the control cavity in a lifting manner, the control cavity is divided into an upper cavity and a lower cavity which are mutually independent, the lower cavity is communicated with the water inlet end of the flow passage, the upper cavity is communicated with the water outlet end of the flow passage, the compression area of the movable piece facing the upper cavity is S 1, the compression area of the movable piece facing the lower cavity is S 2, and the requirements are met by S 1＜S2;
The top end of the control rod extends into the lower cavity to be connected with the movable piece;
The elastic piece is arranged in the upper cavity, the top end of the elastic piece is propped against the inner wall of the upper cavity, and the bottom end of the elastic piece is propped against the movable piece;
When the pressures of the upper chamber and the lower chamber are equal, the movable piece rises to a stroke end position.
2. The valve of claim 1, wherein the force applied by the elastic member to the movable member is F, and the gravity of the control rod is G, wherein F is 0.2 G≤F≤5G.
3. The low water loss pipe force valve of claim 1, wherein a control rod is connected to one side of the movable part facing the lower chamber, a marking cylinder is connected to one side of the movable part facing the upper chamber, and the movable part can be vertically lifted to drive the control rod and the marking cylinder to synchronously lift;
The diameter of the marking cylinder is larger than that of the control rod, so that S 1＜S2 is achieved.
4. The low water damage tubular valve of claim 3, wherein the diameter of the marking cartridge is D 1 and the diameter of the control rod is D 2, wherein 1.1D 2≤D1≤3D2.
5. The valve of claim 3, wherein the bottom end of the marking cylinder is connected with the movable member, the top end of the marking cylinder extends out of the upper chamber, the movable member can vertically lift to drive the marking cylinder to lift, and the elastic member is sleeved on the periphery of the marking cylinder.
6. The low water damage pipe force valve of claim 3, wherein the marking cylinder comprises an outer shell and an inner shell, the outer shell is sleeved on the periphery of the inner shell, scales are arranged on the periphery of the inner shell, and the outer shell is made of transparent materials.
7. The low water damage tube force valve of claim 3, wherein the top seal of the marking cartridge is provided.
8. The valve of claim 3, wherein the top end of the marking cylinder is provided with a bump.
9. The low water loss, tubular power valve of claim 1, further comprising:
the valve shaft is arranged on the valve body and partially penetrates through the flow passage;
The large valve plate is arranged on the flow passage and connected with the valve shaft, and the large valve plate and the valve shaft are eccentrically arranged; the large valve plate can rotate around the valve shaft to close the flow passage, and is provided with a through hole penetrating through the large valve plate;
The bottom of the control rod is hinged with the valve shaft through a connecting rod mechanism, and the movable piece can vertically lift to drive the control rod to lift;
And the small valve plate is arranged on the connecting rod mechanism and is used for sealing the through hole.
10. The low water damage pipe force valve of claim 9, wherein the link mechanism comprises a first link and a second link, a first end of the first link in a length direction is hinged with a bottom end of the control rod, a second end of the first link in a length direction is hinged with a first end of the second link in a length direction, and a second end of the second link in a length direction is hinged with the valve shaft;
The small valve plate is arranged at the joint of the first connecting rod and the second connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422774621.7U CN223563478U (en) | 2024-11-13 | 2024-11-13 | Low water loss pipe force valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422774621.7U CN223563478U (en) | 2024-11-13 | 2024-11-13 | Low water loss pipe force valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223563478U true CN223563478U (en) | 2025-11-18 |
Family
ID=97670021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422774621.7U Active CN223563478U (en) | 2024-11-13 | 2024-11-13 | Low water loss pipe force valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223563478U (en) |
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2024
- 2024-11-13 CN CN202422774621.7U patent/CN223563478U/en active Active
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