Water purification device for direct drinking water from a pipe

Abstract

The application belongs to the technical field of direct drinking water treatment, and discloses a water purification device for pipeline direct drinking water, which comprises a treated water tank, the inside of the treated water tank is fixedly installed with three groups of sealing cylinders, the cooperation of the sealing piston, the sealing cylinder, the sealing disc and the fixing spring and other structures is conducive to automatic plugging of the water inlet through spring return, so that continuous water outflow is avoided, the sealing cylinder provides an installation position for the internal structure, the cooperation of the sealing piston and the movable sealing ring can avoid direct water outflow from the inside of the sealing cylinder, the reset spring can control the sealing disc to contact and plug the upper end opening of the sealing cylinder by pushing the extrusion disc when the sealing piston moves downward, and the internal water pressure can further extrude the sealing disc to avoid continuous water inflow into the inside of the sealing cylinder, the structure can avoid continuous water outflow, the valve does not need to be closed, and rapid replacement after drainage is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of direct drinking water treatment technology, specifically a water purification device for piped direct drinking water. Background Technology

[0002] Before drinking, piped drinking water needs to be purified by a water purification device. By guiding the water into the treatment tank, it is filtered through filter paper and filter cartridges via permeation, effectively filtering impurities. The activated carbon zone in the middle further enhances the filtration effect, making the filtered water meet the standards for direct drinking. The internal filter cartridge first passes through primary filtration, and then activated carbon performs physical and chemical adsorption. The microporous structure of activated carbon adsorbs residual chlorine, odors, organic pollutants, and some heavy metals, improving the taste and reducing disinfection byproducts.

[0003] For example, utility model CN219823756U discloses an activated carbon adsorption placement device, including a filter bucket. The filter bucket has a top cover, and a water outlet pipe runs vertically through the center of the top cover. A water inlet pipe runs vertically through the left side of the center of the top cover. A water storage chamber runs upward through the top of the filter bucket, and a filter element shell is installed inside the water storage chamber. A connecting hole runs upward through the top of the filter element shell. By setting a flow-diverting device inside the filter chamber, the path length of the filtered material inside the activated carbon filter element is increased, so that the activated carbon filter element can filter the material more thoroughly. By setting a fixing and positioning device at the bottom of the filter element shell and the base, the water outlet pipe can be inserted into the connecting hole at the top of the filter element shell more conveniently, accurately and quickly, and the filter element shell can fit more tightly on the sealing ring, which can better prevent unfiltered material from seeping into the water outlet pipe.

[0004] The existing technology can quickly and accurately insert and position the filter during installation and removal by setting a positioning device. However, when replacing and removing the filter, the water inlet pipe needs to be closed, and the remaining water inside the pipe will flow out completely after removal, which will cause water leakage during the replacement process.

[0005] Therefore, a water purification device for piped drinking water is proposed to solve the problems mentioned in the background art. Summary of the Invention

[0006] To address the problems mentioned in the background section, the present invention provides a water purification device for piped drinking water.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a water purification device for pipeline direct drinking water, comprising a treatment water tank, three groups of sealing cylinders are fixedly installed in the inside of the treatment water tank, and sealing pull-out assemblies are movably arranged on the inside of the sealing cylinders;

[0008] The sealing pull-out assembly comprises a sealing piston, two groups of guide plates are fixedly installed on the top of the sealing piston, guide sleeves are slidably arranged on the outside of the guide plates, a sealing disc is fixedly installed on the top of the guide sleeve, the sealing disc is movably arranged above the sealing cylinder, a movable pipe is fixedly installed on the top of the sealing disc, an extrusion disc is fixedly installed on the outside of the middle of the movable pipe, a fixed spring is movably arranged on the top of the extrusion disc, a connecting cylinder is slidably arranged on the outside of the fixed spring and the extrusion disc, and the movable pipe is slidably arranged in the middle of the connecting cylinder.

[0009] Preferably, a threaded disc is fixedly installed on the bottom of the sealing piston, threads are formed on the outside of the threaded disc, and limit assemblies are installed at the bottom of both ends of the threaded disc.

[0010] Preferably, the limit assembly comprises a fixed rod, one end of the fixed rod is fixedly connected with the bottom of the threaded disc, and a torsion spring shaft is arranged on the inside of the other end of the fixed rod.

[0011] Preferably, a turnover sleeve is rotatably arranged on the outside of the torsion spring shaft, the end of the turnover sleeve is rotatably arranged on the inside of the other end of the fixed rod, a reset spring is arranged in the inside of the turnover sleeve, a limit disc is installed at the bottom of the reset spring, the limit disc is slidably arranged on the inside of the turnover sleeve, a movable rod is installed on the top of the limit disc, and a stop rod is fixedly installed on the side of the movable rod close to the sealing cylinder.

[0012] Preferably, a water inlet pipeline is fixedly connected with one side of the lower end of the treatment water tank, a plurality of groups of fixed sealing rings are embeddedly arranged on the inside of the upper end of the connecting cylinder, and the fixed sealing rings are slidably close to the outer wall of the movable pipe.

[0013] Preferably, a water purification tank is sealingly installed on the outside of the upper end of the three groups of connecting cylinders, and a water outlet pipeline is installed on one side of the water purification tank.

[0014] Preferably, a fixed screw pipe is fixedly installed on the outside of the lower end of the sealing cylinder, a screw groove is formed on the inside of the fixed screw pipe, the threaded disc is rotatably arranged on the inside of the fixed screw pipe, the stop rod is movably arranged above the threaded disc, and a water guide pipe is embeddedly arranged on the front of the lower end of the sealing cylinder.

[0015] Preferably, the bottom of the movable tube is provided with a limiting cone, the top of the sealing piston is provided with a positioning cone, and the outer side of the sealing piston is embedded with a plurality of groups of movable sealing rings which are in close contact with the inner wall of the sealing cylinder.

[0016] Preferably, the bottom of the threaded disc is provided with an auxiliary handle, and the top of the positioning cone is combined with a fixed disc.

[0017] Preferably, the top of the outer ring of the fixed disc is provided with a plurality of groups of limiting rods, and the top of the limiting rod is fixedly provided with a fixed ring which is in close contact with the bottom of the limiting cone tube. Preferably, the outer side filter paper is wound between the limiting rods and fixedly installed between the fixed disc and the fixed ring. The middle part of the fixed disc and the fixed ring is connected with an inner filter core, and the outer side of the inner filter core is spliced with a plurality of groups of activated carbon blocks.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] The sealing piston, the sealing cylinder, the sealing disc and the fixed spring are cooperated to automatically block the water inlet through the spring reset, so that the water flow is prevented from continuously flowing out. The sealing cylinder provides an installation position for the internal structure. The sealing piston and the movable sealing ring are cooperated to prevent the water flow from directly flowing out from the inside of the sealing cylinder. The reset spring is used to control the sealing disc to contact and block the upper end opening of the sealing cylinder by pushing the pressing disc when the sealing piston moves down. The internal water pressure is cooperated to further extrude the sealing disc to prevent the water flow from continuously entering the inside of the sealing cylinder. The structure can prevent the water flow from continuously flowing out without closing the valve. After draining, the filter core can be quickly replaced, and the activated carbon structure of the new filter core can adsorb impurities entering the inside.

[0020] The water guide pipe, the turnover sleeve, the reset spring and the stop rod are cooperated to limit the downward movement of the sealing piston and prevent the remaining water in the sealing cylinder from leaking out. The fixed rod and the torsional spring shaft are cooperated to limit the turnover sleeve. The torsional spring of the torsional spring shaft extrudes the turnover sleeve to turn upward. The reset spring in the turnover sleeve pushes the limiting disc downward. The stop rod is always clamped on the top of the fixed screw rod. When the filter core is pulled out, the stop rod limits the position of the sealing piston to be lower than the water guide pipe. The accumulated water in the inside is discharged through the outlet pipe, which is convenient for collection and avoids resource waste. BRIEF DESCRIPTION OF DRAWINGS

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

[0022] Figure 2 Figure is a schematic diagram of the processing water tank profile structure of the present application;

[0023] Figure 3 Figure is a schematic diagram of the movable tube profile structure of the present application;

[0024] Figure 4 Figure is a schematic diagram of the turnover sleeve profile structure of the present application;

[0025] Figure 5 Figure is a schematic diagram of the Figure 2 Figure is a schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 Figure is a schematic diagram of the sealing cylinder profile structure of the present application;

[0027] Figure 7 Figure is a schematic diagram of the outer filter paper profile structure of the present application.

[0028] Figure: 100, processing water tank; 101, water inlet pipe; 102, connecting cylinder; 103, fixed spring; 104, fixed sealing ring; 105, clean water tank; 106, water outlet pipe; 200, water guide pipe; 201, sealing cylinder; 202, fixed screw pipe; 001, sealing pull assembly; 300, sealing piston; 301, sealing disc; 302, movable tube; 303, extrusion disc; 304, limiting cone pipe; 305, guide sleeve; 306, guide plate; 307, positioning cone; 308, movable sealing ring; 309, threaded disc; 310, auxiliary handle; 311, valve disc; 312, connecting rod; 400, outer filter paper; 401, fixed disc; 402, limiting rod; 403, activated carbon block; 404, inner filter core; 405, fixed ring; 002, limiting assembly; 500, blocking rod; 501, fixed rod; 502, torsion spring shaft; 503, turnover sleeve; 504, movable rod; 505, limiting disc; 506, return spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] As Figures 1 to 7 shown, the present application provides a water purification device for pipeline direct drinking water, which comprises a processing water tank 100, three groups of sealing cylinders 201 are fixedly installed inside the processing water tank 100, and a sealing pull assembly 001 is movably arranged inside the sealing cylinder 201;

[0031] The sealing pull-out assembly 001 comprises a sealing piston 300, two groups of guide plates 306 are fixedly installed on the top of the sealing piston 300, a guide sleeve 305 is slidably arranged on the outer side of the guide plates 306, a sealing disc 301 is fixedly installed on the top of the guide sleeve 305, the sealing disc 301 is movably arranged above the sealing cylinder 201, an activity tube 302 is fixedly installed on the top of the sealing disc 301, an extrusion disc 303 is fixedly installed on the outer side of the middle of the activity tube 302, a fixed spring 103 is movably arranged on the top of the extrusion disc 303, a connecting cylinder 102 is slidably arranged on the outer side of the fixed spring 103 and the extrusion disc 303, and the activity tube 302 is slidably arranged in the middle of the connecting cylinder 102.

[0032] A threaded disc 309 is fixedly installed on the bottom of the sealing piston 300, threads are formed on the outer side of the threaded disc 309, and a limiting assembly 002 is installed on the bottom of both ends of the threaded disc 309.

[0033] The above scheme has the following advantages: the processing water tank 100 can provide an installation position for the internal structure, the sealing cylinder 201 can limit the internal structure, the guide sleeve 305 can limit the guide plates 306, the guide plates 306 can be taken out from the guide sleeve 305 when the bottom structure is disassembled, the filter element structure can be conveniently replaced after the guide plates 306 are taken out, the activity tube 302 can move along the inner side of the connecting cylinder 102 under the control of the bottom push, the sealing disc 301 at the bottom can tightly contact the upper end opening position of the sealing cylinder 201 under the push of the fixed spring 103, so as to realize the sealing effect, the connecting cylinder 102 is used for limiting the internal structure, the extrusion disc 303 and the fixed spring 103 can push the sealing disc 301 to move downward to reset on the inner side, and the threaded disc 309 at the bottom can be installed on the inner side of the fixed screw pipe 202 through the outer side thread structure.

[0034] As shown in Figure 7 The limiting assembly 002 comprises a fixed rod 501, one end of the fixed rod 501 is fixedly connected with the bottom of the threaded disc 309, and a torsion spring shaft 502 is arranged on the inner side of the other end of the fixed rod 501.

[0035] A turnover sleeve 503 is rotatably arranged on the outer side of the torsion spring shaft 502, the end of the turnover sleeve 503 is rotatably arranged on the inner side of the other end of the fixed rod 501, a reset spring 506 is arranged in the turnover sleeve 503, a limiting disc 505 is installed on the bottom of the reset spring 506, the limiting disc 505 is slidably arranged on the inner side of the turnover sleeve 503, an activity rod 504 is installed on the top of the limiting disc 505, and a stop rod 500 is fixedly installed on the side of the activity rod 504 close to the sealing cylinder 201.

[0036] Adopt the above scheme: fixed rod 501 and threaded disc 309 fixed connection, threaded disc 309 rotation fixed rod 501 will rotate in synchronization, torsional spring shaft 502 through the torsional spring structure to push the turnover sleeve 503 upward, so as to ensure that the stop bar 500 is always blocked at the top of the fixed screw pipe 202, the inside movable rod 504 can slide inside the turnover sleeve 503, the process of compression of the bottom of the limit disc 505 will be reset spring 506, when you need to disassemble the middle of the structure can control the turnover sleeve 503 spread, the stop bar 500 from the fixed screw pipe 202 top down after threaded disc 309 will lose the limit, convenient and fast to take out for filter core structure replacement.

[0037] As Figures 1-5 The lower end of the water tank 100 is fixedly connected with a water inlet pipe 101, and the inner side of the upper end of the connecting cylinder 102 is embedded with a plurality of fixed sealing rings 104, and the fixed sealing ring 104 is in sliding close contact with the outer wall of the movable pipe 302.

[0038] The outer side of the upper end of the three connecting cylinders 102 is sealingly installed with a set of water purification tank 105, and the water outlet pipe 106 is installed on one side of the water purification tank 105.

[0039] The outer side of the lower end of the sealing cylinder 201 is fixedly installed with a fixed screw pipe 202, and the inner side of the fixed screw pipe 202 is provided with a screw groove, and the threaded disc 309 is rotatably arranged on the inner side of the fixed screw pipe 202. The stop bar 500 is movably arranged above the threaded disc 309, and the front surface of the lower end of the sealing cylinder 201 is embedded with a water guide pipe 200.

[0040] The bottom of the movable pipe 302 is provided with a limiting cone pipe 304, and the top of the sealing piston 300 is provided with a positioning cone 307, and the outer side of the sealing piston 300 is embedded with a plurality of movable sealing rings 308, and the movable sealing ring 308 is in close contact with the inner wall of the sealing cylinder 201. The groove of the movable pipe 302 is slidably provided with a valve disc 311 with the same diameter, and the top of the valve disc 311 is fixedly provided with a connecting rod 312, and the connecting rod 312 is fixedly connected with the top of the inner side of the water purification tank 105.

[0041] The bottom of the threaded disc 309 is provided with an auxiliary handle 310, and the top of the positioning cone 307 is combined with a fixed disc 401.

[0042] Adopt the above scheme: water inlet pipe 101 is used for and straight drinking water input pipe is connected, after connection can be straight drinking water is introduced into the treatment water tank 100 inside and carries out the filtration treatment, through using fixed sealing ring 104 can increase the sealing property of movable pipe 302 up and down movement, pure water tank 105 can store the straight drinking water that completes filtration, finally through water outlet pipe 106 and is discharged and is drunk, fixed screw pipe 202 can cooperate with the threaded disc 309 for the limit of the filter structure in the inside, water guide pipe 200 can assist the water flow that accumulates inside is guided and is collected, avoid resource waste, limit conical tube 304 can guide and insert fixed ring 405 upper end and combine, extrusion can increase the sealing property, movable sealing ring 308 can increase the sealing property of sealing piston 300 sliding, valve disc 311 is the special-shaped structure of the arc-shaped groove for outside, the arc-shaped groove for outside can guarantee the normal flow of water flow, when movable pipe 302 lifts to the highest, valve disc 311 is located in the lower area of the slot, the bottom does not directly contact, water flow can pass through the arc-shaped groove and flows upwards, when movable pipe 302 moves to the lowest, the top of valve disc 311 will be in close contact with the uppermost end of the slot, water flow will not flow through the arc-shaped groove, so that the water in the pure water tank 105 cannot backflow into the inside of movable pipe 302, connecting rod 312 is used for connecting valve disc 311 with the top inside of pure water tank 105, so as to limit the position of valve disc 311, the auxiliary handle 310 at the bottom is used for providing gripping for the user, convenient control threaded disc 309 rotates and disassembles.

[0043] As Figure 4 And Figure 6 The top of the outer ring of the fixed disc 401 is provided with a plurality of limiting rods 402, and the top of the limiting rod 402 is fixedly provided with a fixed ring 405. The top of the fixed ring 405 is in close contact with the bottom of the limiting conical tube 304. The limiting rods 402 are wound with an outer filter paper 400, which is fixedly installed between the fixed disc 401 and the fixed ring 405. The middle part of the fixed disc 401 and the fixed ring 405 is connected with an inner filter core 404, and the outer side of the inner filter core 404 is spliced with a plurality of active carbon blocks 403.

[0044] Adopt the above scheme: limit rod 402 is used for connecting fixed disc 401 and fixed ring 405, and good supporting effect is obtained, and the outer side filter paper 400 wound on the inner side can be limited, water flow impact caused by deformation can be avoided, the inner filter core 404 structure can further carry out filtration treatment, and the cooperation of activated carbon block 403 can effectively adsorb impurities, the outer side filter paper 400 is PP cotton, can filter the large particle impurities in water, and the activated carbon block 403 in the middle is combined and installed as a fan-shaped column structure, and after assembly, a layer of permeable membrane is sleeved on the outside to further improve the adsorption effect of the activated carbon block 403, the internal aperture of the activated carbon block 403 is 0.5-50 nanometers, can effectively adsorb impurities in water, effectively protect the subsequent filter core structure, and the surface oxygen-containing functional groups (such as carboxyl and hydroxyl) are oxidized and reduced with residual chlorine and organic pollutants, and the residual chlorine and organic pollutants are decomposed into harmless substances, heavy metal ions such as lead and mercury are adsorbed by ion exchange or complexation, the toxicity is reduced, more than 99% of the residual chlorine can be adsorbed by the activated carbon block 403, the pungent smell is eliminated, and the taste is improved.

[0045] The working principle and use process of the present application are as follows: in the process of water purification, the water flow enters the inside of the treatment water tank 100 through the water inlet pipe 101, and then enters the inside of the sealing cylinder 201, and then flows upwards after passing through the outer side filter paper 400, the activated carbon block 403 and the inner filter core 404, and then enters the inside of the movable pipe 302, and then is guided by the arc-shaped groove on the outer side of the valve disc 311 to continuously rise into the inside of the purified water tank 105, and finally accumulates and is discharged by the water outlet pipe 106; when it is necessary to replace the filter core, the auxiliary handle 310 at the bottom is gripped to drive the threaded disc 309 to rotate along the inside of the fixed screw pipe 202, the fixed spring 103 located in the inside of the connecting cylinder 102 pushes the extrusion disc 303 downwards after being separated from the fixed screw pipe 202, and at the same time drives the movable pipe 302 and the sealing disc 301 to descend, the sealing disc 301 moves to contact the top of the sealing cylinder 201 to form a blockage, and in the process of descending, the movable pipe 302 contacts the valve disc 311 to keep sealing and block the channel in the movable pipe 302, and in the process of descending, the sealing piston 300 moves to the lower side of the water guide pipe 200, and the water flow accumulated in the inside is discharged through the water guide pipe 200, after being discharged, the two groups of turnover sleeves 503 are controlled to turn over along the torsional spring shaft 502, the stop rod 500 is removed to limit the threaded disc 309, and then the sealing piston 300 can be taken out, finally the filter core structure is replaced, and the guide plate 306 is inserted into the inside of the guide sleeve 305, and then is inserted into the inside of the sealing cylinder 201 to be installed.

[0046] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0047] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water purification device for direct drinking water in pipes, comprising a treated water tank (100), characterized in that: The inside of the processing water tank (100) is fixedly provided with three groups of sealing cylinders (201), and the inner side of the sealing cylinder (201) is movably provided with a sealing pulling assembly (001), and the sealing cylinder is provided with a filter element; The sealing pulling assembly (001) comprises a sealing piston (300), and the top of the sealing piston (300) is fixedly provided with two groups of guide plates (306), the outer side of the guide plate (306) is slidably provided with a guide sleeve (305), and the top of the guide sleeve (305) is fixedly provided with a sealing disc (301), the sealing disc (301) is movably arranged above the sealing cylinder (201), the top of the sealing disc (301) is fixedly provided with a movable tube (302), the outer side of the middle of the movable tube (302) is fixedly provided with an extrusion disc (303), the top of the extrusion disc (303) is movably provided with a fixed spring (103), the outer side of the fixed spring (103) and the extrusion disc (303) is slidably provided with a connecting cylinder (102), and the movable tube (302) is slidably arranged in the middle of the connecting cylinder (102); The bottom of the sealing piston (300) is fixedly provided with a threaded disc (309), and the outer side of the threaded disc (309) is provided with threads, and the bottom of both ends of the threaded disc (309) is provided with a limiting assembly (002); The bottom of the movable tube (302) is provided with a limiting cone tube (304), the top of the sealing piston (300) is provided with a positioning cone (307), and the outer side of the sealing piston (300) is embedded with a plurality of movable sealing rings (308), the movable sealing ring (308) is closely attached to the inner wall of the sealing cylinder (201), the slot in the middle of the movable tube (302) is slidably provided with a valve disc (311) with the same diameter, and the top of the valve disc (311) is fixedly provided with a connecting rod (312), and the connecting rod (312) is fixedly connected with the top of the inner side of the water purification tank (105); The outer side of the upper end of the three connecting cylinders (102) is sealingly provided with a water purification tank (105), and one side of the water purification tank (105) is provided with a water outlet pipeline (106).

2. A water purification device for direct pipe drinking water according to claim 1, characterized in that: The bottom of the threaded disc (309) is provided with an auxiliary handle (310), and the top of the positioning cone (307) is combined with a fixed disc (401).

3. A water purification device for direct pipe drinking water according to claim 2, characterized in that: The limiting assembly (002) comprises a fixed rod (501), and one end of the fixed rod (501) is fixedly connected with the bottom of the threaded disc (309), and the inner side of the other end of the fixed rod (501) is provided with a torsion spring shaft (502).

4. A water purification device for direct pipe drinking water according to claim 3, characterized in that: The outer side of the torsion spring shaft (502) is rotationally provided with a turnover sleeve (503), and the end of the turnover sleeve (503) is rotationally located on the inner side of the other end of the fixed rod (501), the inside of the turnover sleeve (503) is provided with a reset spring (506), and the bottom of the reset spring (506) is provided with a limiting disc (505), the limiting disc (505) is slidingly arranged on the inner side of the turnover sleeve (503), and the top of the limiting disc (505) is provided with a movable rod (504), and the upper end of the movable rod (504) is fixedly provided with a blocking rod (500) near one side of the sealing cylinder (201).

5. A water purification unit for direct pipe drinking water according to claim 1, characterized in that: The lower end of the processing water tank (100) is fixedly connected with a water inlet pipe (101), and the upper end of the connecting cylinder (102) is embedded with a plurality of groups of fixed sealing rings (104) on the inner side, and the fixed sealing ring (104) is slidingly attached to the outer wall of the movable pipe (302).

6. A water purification unit for direct pipe drinking water according to claim 4, characterized in that: The outer side of the lower end of the sealing cylinder (201) is fixedly provided with a fixed screw pipe (202), and the inner side of the fixed screw pipe (202) is provided with a screw groove, the screw disc (309) is rotationally arranged on the inner side of the fixed screw pipe (202), the blocking rod (500) is movably arranged above the screw disc (309), and the front surface of the lower end of the sealing cylinder (201) is embedded with a water guide pipe (200).

7. A water purification unit for direct pipe drinking water according to claim 4, characterized in that: The outer circle of the fixed disc (401) is provided with a plurality of groups of limiting rods (402) on the top, and the top of the limiting rod (402) is fixedly provided with a fixed ring (405), the top of the fixed ring (405) is closely attached to the bottom of the limiting conical pipe (304), the limiting rods (402) are windingly provided with an outer filter paper (400) between them, and the outer filter paper (400) is fixedly installed between the fixed disc (401) and the fixed ring (405), the middle part of the fixed disc (401) and the fixed ring (405) is connected with an inner filter core (404), and the outer side of the inner filter core (404) is spliced with a plurality of groups of activated carbon blocks (403).

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