A household faucet filtering device

Abstract

A household faucet filtering device comprises a filtering pipe fitting, a reversing valve, a backwashing pipe, a filtering mechanism and a cleaning mechanism; the filtering pipe fitting comprises an outer pipe, an inner pipe, a double-layer filtering pipe and a one-way valve; the filtering mechanism comprises a spiral plate and a filtering plate; the spiral plate is fixedly installed between the inner pipe and the double-layer filtering pipe, and is spirally arranged around the inner pipe; the filtering plate is arranged radially along the spiral plate and is fixedly connected to the spiral plate; the cleaning mechanism comprises a cleaning pipe, a nozzle, an adjusting pipe, a water pump and a one-way valve; the adjusting pipe is coaxially slidably installed inside the inner pipe; a plurality of through ports 1 are provided on the inner pipe, and a plurality of through ports 2 corresponding to the through ports 1 are provided on the adjusting pipe; the cleaning pipe is sealingly slidably installed inside the adjusting pipe, and the water inlet of the cleaning pipe is slidably installed inside the outer pipe and is connected to the backwashing pipe; a one-way valve 2 is provided on the inner layer of the double-layer filtering pipe; the water pump is connected to the interlayer cavity of the double-layer filtering pipe and is connected to the outside; a plurality of nozzles connected to the cleaning pipe are installed on the cleaning pipe.

Description

Technical Field

[0001] The invention relates to the technical field of water filtration, in particular to a household faucet filtering device. Background Art

[0002] With the continuous improvement of living quality, people pay more and more attention to the filtration of domestic tap water.

[0003] In order to filter tap water, a simple water purifier is usually installed; however, for a filtering device directly connected to tap water, the life of the filter element in the purifier is generally short due to the presence of impurities such as rust and gravel in the tap water.

[0004] In order to solve this problem, a faucet filter that can be backwashed has been developed on the market, such as the Chinese utility model patent with announcement number CN204729708U and name of a backwash faucet. The patent scheme includes a main body, a filtering device arranged on the main body, and a water outlet head arranged at the water outlet of the filtering device. A purified water waterway and a tap water waterway are arranged in the water outlet head. A backwash switch adapted to the purified water waterway and the tap water waterway is arranged on the water outlet head. When the backwash switch is turned on, the purified water waterway and the tap water waterway are in a intercepting state, and the purified water waterway and the tap water waterway are connected. Therefore, the utility model has a simple structure and is easy to use. When the filtering device needs to be flushed, it only needs to turn on the backwash switch. The utility model with a backwash function has a longer service life and a better purification effect.

[0005] However, whether it is a simple faucet water purifier or a faucet filter that can be backwashed in the above-mentioned patent solution, its filtering accuracy can generally only achieve a coarse filtering effect and cannot achieve fine filtering; and if a multiple filtration technical solution is adopted, due to structural design reasons, it is often impossible to achieve automatic cleaning of the filter element, but instead further shortens the service life.

[0006] Therefore, it is necessary to invent a household faucet filtering device that can achieve fine filtration and effectively increase the service life. Summary of the invention

[0007] In view of the above problems, the present invention proposes a household faucet filtering device, and the technical solution adopted is as follows:

[0008] A household faucet filtering device, comprising a filtering pipe fitting, a reversing valve, a backwashing pipe, a filtering mechanism and a cleaning mechanism; the filtering pipe fitting comprises an outer pipe, an inner pipe, a double-layer filtering pipe and a one-way valve; the inner pipe is fixedly installed inside the outer pipe; the double-layer filtering pipe is arranged between the inner pipe and the outer pipe, and is fixedly installed inside the outer pipe; the outer pipe is connected to one of the channels of the reversing valve through a water inlet pipe, and is also connected to the other channel of the reversing valve through a backwashing pipe, and a water outlet pipe is arranged on the outer pipe; the one-way valve is installed on the inner pipe, and is used to intermittently connect the inner pipe with the outside;

[0009] The filtering mechanism comprises a spiral plate and a filter plate; the spiral plate is fixedly installed between the inner tube and the double-layer filter tube and is spirally arranged around the inner tube; the filter plate is arranged between the inner tube and the double-layer filter tube, and the filter plate is radially arranged along the spiral plate and is fixedly connected to the spiral plate;

[0010] The cleaning mechanism includes a cleaning tube, a nozzle, an adjusting tube, a water pump and a second one-way valve; the adjusting tube is coaxially slidably installed inside the inner tube; the inner tube is provided with a plurality of through-ports 1, the adjusting tube is provided with a plurality of through-ports 2 corresponding to the first through-ports, and the second through-ports are intermittently connected with the corresponding first through-ports; the cleaning tube is sealingly slidably installed inside the adjusting tube, and the water inlet of the cleaning tube is slidably installed inside the outer tube and connected with the backwashing tube; the inner layer of the double-layer filter tube is provided with a plurality of mounting holes, and each mounting hole is installed with a second one-way valve; the second one-way valve intermittently connects the cavity between the double-layer filter tube and the inner tube with the interlayer cavity of the double-layer filter tube; the water pump is connected with the interlayer cavity of the double-layer filter tube and is connected with the outside world; the cleaning tube is provided with a plurality of nozzles connected with the cleaning tube.

[0011] Furthermore, the cleaning mechanism also includes a group of several electromagnets arranged between the cleaning tube and the outer tube; two electromagnets in the same group are fixedly mounted on the cleaning tube and the outer tube respectively, and are used to control the sliding of the cleaning tube.

[0012] Furthermore, a flange plate 1 which is slidably mounted in the outer tube is coaxially fixedly mounted on the end side of the cleaning tube, and an electromagnet 1 located on the cleaning tube is fixedly mounted on the flange plate 1.

[0013] Furthermore, the cleaning mechanism also includes a plurality of electromagnet groups 2 arranged between the adjusting tube and the outer tube; two electromagnets 2 in the same group are fixedly mounted on the adjusting tube and the outer tube respectively, and are used to control the sliding of the adjusting tube.

[0014] Furthermore, a flange plate 2 which is slidably mounted in the outer tube is coaxially fixedly mounted on the end side of the adjusting tube, and an electromagnet 2 located on the adjusting tube is fixedly mounted on the flange plate 2.

[0015] Furthermore, the water inlet of the cleaning pipe is trumpet-shaped, and a sealing ring tightly attached to the inner wall of the outer pipe is installed on the outermost side of the water inlet.

[0016] Furthermore, the one-way valve comprises a spherical valve core and a valve body; the valve body is fixedly mounted on the inner tube and connected to the outside, and the side wall and the innermost end of the valve body are provided with vents connected to the inner tube; the spherical valve core is movably mounted inside the valve body.

[0017] Furthermore, the one-way valve 2 includes a torsion spring, a valve plate and a valve ring; the valve plates are provided with a plurality of valve plates, and are all rotatably mounted on the valve ring; all valve plates can be assembled into a trumpet shape that is wide inside and narrow outside; each valve plate and valve ring are elastically connected by a torsion spring; and the valve ring is fixedly mounted on the corresponding mounting hole.

[0018] Since the present invention adopts the above technical solution, the present invention has the following advantages:

[0019] 1. The present invention, through the coordinated design of the filter pipe, the reversing valve, the backwash pipe, the filter mechanism and the cleaning mechanism, can not only achieve the fine filtration effect by filtering the tap water multiple times, but also can automatically clean the filter plate and the double-layer filter tube, effectively improving the service life.

[0020] 2. The cleaning mechanism of the present invention can not only extract the cleaning water inside the inner layer of the double-layer filter tube, but also extract the cleaning water remaining in the inner tube, thereby preventing the remaining cleaning water from affecting subsequent filtering work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1-Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention at AA.

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0025] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at D in the middle.

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the overall EE of the present invention.

[0027] Figure 8 It is a schematic diagram of the internal structure of the filter tube of the present invention.

[0028] Fig. 9 It is a structural schematic diagram of the outer tube of the present invention.

[0029] Fig.10 It is a schematic diagram of the cross-sectional structure at FF of the double-layer filter tube, the filter mechanism and the cleaning mechanism of the present invention.

[0030] Fig.11 It is a schematic diagram of the bottom structure of the double-layer filter tube, the filter mechanism and the cleaning mechanism of the present invention.

[0031] Fig.12 It is a schematic diagram of the cross-sectional structure of the double-layer filter tube and the filter mechanism at GG of the present invention.

[0032] Fig.13 It is a schematic diagram of the assembly structure of the double-layer filter tube and the filter mechanism of the present invention.

[0033] Figure 14-15 It is a structural schematic diagram of the filtering mechanism of the present invention.

[0034] Fig.16 It is a schematic diagram of the structure of the spiral plate in the filtering mechanism of the present invention.

[0035] Fig.17 It is a schematic diagram of the structure of a double-layer filter tube in the filter tube of the present invention.

[0036] Fig.18 It is a schematic diagram of the cross-sectional structure at HH of the double-layer filter tube of the present invention.

[0037] Figure 19-21 It is a partial structural schematic diagram of the cleaning mechanism of the present invention.

[0038] Figure 22-Figure 23 It is a schematic diagram of the structure of the one-way valve 2 in the cleaning mechanism of the present invention.

[0039] Figure Number:

[0040] 1-filter pipe; 101-outer pipe (1011-water inlet pipe; 1012-water outlet pipe); 102-inner pipe (1021-port 1); 103-double-layer filter pipe (1031-installation hole); 104-check valve 1 (1041-spherical valve core; 1042-valve body);

[0041] 2- reversing valve;

[0042] 3-Backwash pipe;

[0043] 4-filter mechanism; 401-spiral plate; 402-filter plate;

[0044] 5-cleaning mechanism; 501-cleaning pipe (5011-water inlet; 5012-sealing ring); 502-electromagnet group one; 503-sprinkler; 504-adjusting pipe (5041-port two); 505-electromagnet group two; 506-water pump; 507-check valve two (5071-torsion spring; 5072-valve plate; 5073-valve ring). DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0046] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "in", "out", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] Example:

[0048] This embodiment is used for filtering household taps, such as Figure 1-Figure 6As shown, a household faucet filtering device comprises a filtering pipe 1, a reversing valve 2, a backwashing pipe 3, a filtering mechanism 4 and a cleaning mechanism 5; the filtering pipe 1 comprises an outer pipe 101, an inner pipe 102, a double-layer filtering pipe 103 and a one-way valve 104; the reversing valve 2 is a two-way valve; the outer pipe 101 is composed of two connected external pipes, one of which is provided with an inlet pipe 1011 and is connected with a channel 1 of the reversing valve 2 through the inlet pipe 1011, and the other is provided with an outlet pipe 1012 and is connected with a household faucet through the outlet pipe 1012, and the filtered water flows out through the outlet pipe 1012; the top ends of the two external pipes are connected with the backwashing pipe 3, and the backwashing pipe 3 is connected with the channel 2 of the reversing valve 2; each Inner tubes 102 are fixedly installed in the outer tubes; a double-layer filter tube 103 is provided between each outer tube and its corresponding inner tube 102, and the outer layer of the double-layer filter tube 103 is coaxially fixedly installed on the inner wall of the outer tube 101; a one-way valve 104 is installed at the bottom end of each inner tube 102 for intermittently connecting the inner tube 102 with the outside; the one-way valve 104 includes a spherical valve core 1041 and a valve body 1042; the valve body 1042 is fixedly installed at the bottom end of the inner tube 102 and connected with the outside, and the side wall and the innermost end of the valve body 1042 are provided with ventilation holes connected to the inner tube 102, and the spherical valve core 1041 is movably installed inside the valve body 1042; a group of filtering mechanisms 4 and a group of cleaning mechanisms 5 are provided in each outer tube.

[0049] like Figure 3-Figure 7 and Figure 10-Figure 16 As shown, each group of filtering mechanisms 4 includes a spiral plate 401 and a filter plate 402; the spiral plate 401 is fixedly installed between the inner tube 102 and the double-layer filter tube 103, and is spirally arranged around the inner tube 102, and a spiral groove is formed between adjacent threads of the spiral plate 401; there are four filter plates 402, and they are arranged between the inner tube 102 and the double-layer filter tube 103, the four filter plates 402 are evenly distributed along the circumference and vertically arranged on the outer periphery of the inner tube 102, and the filter plates 402 are radially arranged along the spiral plate 401 and fixedly connected with each layer of threads of the spiral plate 401.

[0050] like Figure 3-Figure 10 and Figure 17-Figure 23As shown, each cleaning mechanism 5 includes a cleaning tube 501, an electromagnet group 1 502, a nozzle 503, an adjusting tube 504, an electromagnet group 2 505, a water pump 506 and a check valve 2 507; the adjusting tube 504 is coaxially slidably installed inside the inner tube 102, and the top of the adjusting tube 504 is coaxially fixedly installed with a flange plate 2 slidably installed in the top of the corresponding outer tube; a plurality of electromagnet groups 2 505 are arranged between the flange plate 2 and the top of the outer tube; the two electromagnet groups 2 in the same group are respectively Fixedly mounted on the flange plate 2 and the top of the outer tube; the second electromagnet group 505 includes a second attracting electromagnet group and a second repelling electromagnet group that are evenly distributed and interspersed, and the second attracting electromagnet group and the second repelling electromagnet group work independently, thereby driving the regulating tube 504 to move up and down; the inner tube 102 is provided with a plurality of through-ports 1021, and the regulating tube 504 is provided with a plurality of through-ports 2 5041 corresponding to the through-ports 1 1021, and the through-ports 2 5041 are intermittently connected with the corresponding through-ports 1 1021;

[0051] The cleaning pipe 501 is coaxially sealed and slidably installed inside the regulating pipe 504, and the water inlet 5011 at the top of the cleaning pipe 501 is slidably installed at the top of the corresponding external pipe and is connected to the backwash pipe 3; the water inlet 5011 of the cleaning pipe 501 is in an upward trumpet shape, and a sealing ring 5012 that is tightly attached to the inner wall of the outer pipe 101 is installed on the outermost side of the water inlet 5011; a flange plate 1 that is slidably installed at the top of the external pipe is coaxially fixedly installed below the water inlet 5011 of the cleaning pipe 501; a plurality of flanges are provided between the flange plate 1 and the top of the external pipe. The electromagnet group 502 is a dry electromagnet group; two electromagnets 1 in the same group are fixedly mounted on the flange plate 1 and the top of the outer tube respectively; the electromagnet group 502 includes an attractive electromagnet group 1 and a repulsive electromagnet group 1 which are evenly distributed and interspersed, and the attractive electromagnet group 1 and the repulsive electromagnet group 1 work alternately, thereby driving the cleaning tube 501 to reciprocate; a plurality of nozzles 503 connected to the cleaning tube 501 are installed on the cleaning tube 501, and the nozzles 503 correspond to the through-port 1021 on the inner tube 102, and are intermittently connected to the corresponding through-port 1021;

[0052] The inner layer of the double-layer filter tube 103 is provided with a plurality of mounting holes 1031, and each mounting hole 1031 is provided with a check valve 507; the check valve 507 intermittently connects the cavity between the double-layer filter tube 103 and the inner tube 102 with the interlayer cavity of the double-layer filter tube 103; each check valve 507 includes a torsion spring 5071, a valve plate 5072 and a valve ring 5073; there are ten valve plates 5072, and they are all rotatably mounted on the valve ring 5073; the valve plates 5072 are fan-shaped, and all valve plates 5072 can be combined into a trumpet shape with a wide inside and a narrow outside; each valve plate 5072 is elastically connected to the valve ring 5073 through a torsion spring 5071; the valve ring 5073 is fixedly mounted on the corresponding mounting hole 1031;

[0053] The water pump 506 is fixedly mounted on the outer tube 101 , and the water pump 506 is communicated with the interlayer cavity of the corresponding double-layer filter tube 103 and is communicated with the outside.

[0054] The working principle of this embodiment is as follows:

[0055] The water inlet of the reversing valve 2 is connected to the domestic water pipeline, and the water outlet pipe 1012 of the outer pipe 101 is connected to the domestic faucet;

[0056] 1021 on the inner tube 102, and the inner tube 102 is not connected to the inner layer of the double-layer filter tube 103; the channel 1 of the reversing valve 2 is opened, and the channel 2 is closed, and the water from the domestic water pipe enters the water inlet pipe 1011 through the channel 1 of the reversing valve 2, and then the water enters the inner layer of the double-layer filter tube 103 of one of the outer tubes (at this time, the one-way valve 2 507 is in a closed state), the water moves upward along the spiral plate 401 in the double-layer filter tube 103 and passes through each filter plate 402 for many times, and then the water enters the inner layer of the double-layer filter tube 103 of the other outer tube, the water moves downward along the spiral plate 401 in the double-layer filter tube 103 and passes through each filter plate 402 for many times, and finally the water flows from the water outlet pipe 1012 to the faucet. In the above process, the water is filtered multiple times to achieve the effect of fine filtration.

[0057] When it is necessary to clean the double-layer filter tube 103 and the filter plate 402, the second group of attracting electromagnets will be powered off, the second group of repelling electromagnets will be powered on, the regulating tube 504 will move upward, and the second port 5041 thereon will be connected to the corresponding port 1 1021 on the inner tube 102, so that the inner tube 102 is connected to the inner layer of the double-layer filter tube 103; the channel 1 of the reversing valve 2 is closed, and the channel 2 is opened, and the water from the domestic water pipe enters the backwashing pipe 3 through the channel 2 of the reversing valve 2, and then the water enters the top of the two outer tubes, and enters the corresponding cleaning pipe 501 along their respective water inlets 5011, and then the water is sprayed out from the nozzle 503, and the sprayed high-pressure water flow cleans the double-layer filter tube 103 and the filter plate 402; at the same time, the first group of attracting electromagnets and the first group of repelling electromagnets work alternately, thereby driving the cleaning pipe 501 to reciprocate up and down, expanding the cleaning area and improving the cleaning effect;

[0058] After cleaning, the channel 1 and the channel 2 of the reversing valve 2 are closed, the water pump 506 is started, and under the action of air pressure, the valve plate 5072 of the one-way valve 2 507 is opened, and the cavity between the double-layer filter tube 103 and the inner tube 102 is connected with the interlayer cavity of the double-layer filter tube 103, and the water in the cavity between the double-layer filter tube 103 and the inner tube 102 enters the interlayer cavity of the double-layer filter tube 103 through the one-way valve 2 507, and flows to the outside through the water pump 506; at the same time, the spherical valve core 1041 in the one-way valve 1 104 moves upward under the action of air pressure, and the outside air enters the inner tube 102 from the vent hole on the side wall of the valve body 1042, and the residual water in the inner tube 102 enters the cavity between the double-layer filter tube 103 and the inner tube 102 through the connected port 1 1021 and the port 2 5041 under the action of air pressure, and then is pumped to the outside by the water pump 506;

[0059] As described above, after the water pump 506 pumps the water generated by cleaning to the outside, the cleaning tube 501 returns to its original position, the attractive electromagnet group 2 is energized again, the repulsive electromagnet group 2 is de-energized again, the port 2 5041 on the regulating tube 504 is not connected with the port 1 1021 on the inner tube 102, the inner tube 102 is not connected with the inner layer of the double-layer filter tube 103, the channel 1 of the reversing valve 2 is opened, the channel 2 is closed, and the filtering work starts again.

Claims

1. A household faucet filter device, characterized in that: The invention comprises a filter pipe (1), a reversing valve (2), a backwashing pipe (3), a filter mechanism (4) and a cleaning mechanism (5); the filter pipe (1) comprises an outer pipe (101), an inner pipe (102), a double-layer filter pipe (103) and a one-way valve (104); the inner pipe (102) is fixedly mounted inside the outer pipe (101); the double-layer filter pipe (103) is arranged between the inner pipe (102) and the outer pipe (101) and is fixedly mounted inside the outer pipe (101); the outer pipe (101) is connected to one of the channels of the reversing valve (2) through a water inlet pipe (1011) and is also connected to another channel of the reversing valve (2) through a backwashing pipe (3); and a water outlet pipe (1012) is provided on the outer pipe (101); the one-way valve (104) is mounted on the inner pipe (102) and is used to intermittently connect the inner pipe (102) with the outside; The filtering mechanism (4) comprises a spiral plate (401) and a filter plate (402); the spiral plate (401) is fixedly installed between the inner tube (102) and the double-layer filter tube (103), and is spirally arranged around the inner tube (102); the filter plate (402) is arranged between the inner tube (102) and the double-layer filter tube (103), and the filter plate (402) is radially arranged along the spiral plate (401) and is fixedly connected to the spiral plate (401); The cleaning mechanism (5) comprises a cleaning pipe (501), a nozzle (503), a regulating pipe (504), a water pump (506) and a second one-way valve (507); the regulating pipe (504) is coaxially slidably mounted inside the inner pipe (102); the inner pipe (102) is provided with a plurality of first openings (1021); the regulating pipe (504) is provided with a plurality of second openings (5041) corresponding to the first openings (1021); the second openings (5041) are intermittently connected to the corresponding first openings (1021); the cleaning pipe (501) is sealingly slidably mounted inside the regulating pipe (504); and the water inlet ( The double-layer filter tube (103) is provided with a plurality of mounting holes (1031) on the inner layer, and each mounting hole (1031) is provided with a second one-way valve (507); the second one-way valve (507) intermittently connects the cavity between the double-layer filter tube (103) and the inner tube (102) with the interlayer cavity of the double-layer filter tube (103); the water pump (506) is connected with the interlayer cavity of the double-layer filter tube (103) and is connected with the outside; and the cleaning tube (501) is provided with a plurality of nozzles (503) connected with the cleaning tube (501).

2. A household faucet filter device according to claim 1, characterized in that: The cleaning mechanism (5) further comprises a plurality of electromagnet groups (502) arranged between the cleaning tube (501) and the outer tube (101); two electromagnets of the same group are respectively fixedly mounted on the cleaning tube (501) and the outer tube (101) and are used to control the sliding of the cleaning tube (501).

3. A household faucet filter device according to claim 2, characterized in that: A flange plate 1 slidably mounted in the outer tube (101) is coaxially fixedly mounted on the end side of the cleaning tube (501), and an electromagnet 1 located on the cleaning tube (501) is fixedly mounted on the flange plate 1.

4. A household faucet filter device according to claim 1, characterized in that: The cleaning mechanism (5) further comprises a plurality of electromagnet groups (505) arranged between the regulating tube (504) and the outer tube (101); the two electromagnets of the same group are respectively fixedly mounted on the regulating tube (504) and the outer tube (101) and are used to control the sliding of the regulating tube (504).

5. A household faucet filter device according to claim 4, characterized in that: A flange plate 2 is coaxially fixedly mounted on the end side of the regulating tube (504) and is slidably mounted in the outer tube (101). The electromagnet 2 located on the regulating tube (504) is fixedly mounted on the flange plate 2.

6. A household faucet filter device according to claim 1, characterized in that: The water inlet (5011) of the cleaning tube (501) is trumpet-shaped, and a sealing ring (5012) is mounted on the outermost side of the water inlet (5011) and is in close contact with the inner wall of the outer tube (101).

7. A household faucet filter device according to claim 1, characterized in that: The one-way valve (104) comprises a spherical valve core (1041) and a valve body (1042); the valve body (1042) is fixedly mounted on the inner tube (102) and communicated with the outside, and a vent hole communicating with the inner tube (102) is provided on the side wall and the innermost end of the valve body (1042); the spherical valve core (1041) is movably mounted inside the valve body (1042).

8. A household faucet filter device according to claim 1, characterized in that: The one-way valve (507) comprises a torsion spring (5071), a valve plate (5072) and a valve ring (5073); a plurality of valve plates (5072) are provided, and all are rotatably mounted on the valve ring (5073); all valve plates (5072) can be assembled into a trumpet shape that is wide inside and narrow outside; each valve plate (5072) is elastically connected to the valve ring (5073) via a torsion spring (5071); and the valve ring (5073) is fixedly mounted on the corresponding mounting hole (1031).

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