CN107129066B - A kind of portable water purifier and its water purification, backwash and replacement method - Google Patents

Abstract

The invention relates to a portable water purifier and methods for water purification, backwashing and filler replacement thereof, belonging to the field of drinking water treatment. The portable water purifier includes a water-drawing part and a filter part; the water-drawing part includes a water inlet cylinder, and the lower end of the water inlet cylinder has internal threads; the filter part includes a stuffing tube with two ends open, and a stud is installed at both ends of the stuffing tube , one of the studs is matched with the internal thread of the water inlet cylinder, and the other stud is connected to the tail cap with the water outlet. The water purifier of the present invention optimizes the structure of the packing cylinder. Under the premise of meeting the water purification requirements, the packing can be backwashed, the replacement frequency of the packing is reduced, the use time of the packing is prolonged, the utilization rate of the packing is improved, and the replacement of the packing is easier. The water purification method adopts a water purifier to purify the sewage to the standard of drinking water; the backwashing method can realize the flushing of the filler of the water purifier, prolonging the use time of the filler; the replacement method of the filler can simply and quickly replace the filler.

Description

A portable water purifier and its water purification, backwashing and filler replacement methods

technical field

The invention belongs to the technical field of water purifiers, and relates to a portable water purifier with reusable filter material and convenient replacement, more specifically, a portable water purifier and its water purification, backwashing and packing Replacement method.

Background technique

In activities such as underground mining, camping, outdoor tourism, and individual combat, people need to take sufficient and effective drinking water safety measures. If you carry drinking water directly, it will increase the travel burden. At present, the more common way is to use an outdoor water purifier to purify the natural water source and drink it directly. Outdoor water purifiers use natural water such as streams, rivers, lakes, and rainwater as water sources. Through filtration or disinfection, pathogenic bacteria in the water are filtered out or killed to obtain safe drinking water. When the outdoor water purifier is used, only manpower is required to purify the outdoor natural water at any time into sterile, free of suspended pollutants and other harmful substances, which can be directly drunk.

The most important thing about an outdoor water purifier is its portability and effective water purification effect. At present, most of the common water purifiers on the market are household water purifiers, which are bulky and require a power supply to drive the water pump. The water pump makes the water pass through the multi-stage filter layer to achieve high-precision filtration. The household water purifier has good water purification effect but is not easy to carry. It is obviously unrealistic to use it outdoors; however, the portable water purifiers currently on the market generally use microfiltration membranes + activated carbon to purify water. After long-term use, pollutants will accumulate in the water purifier, which will easily cause blockage of the water purifier. Potential secondary pollution risks are brought about. Due to its structural limitations, the filler cannot be replaced. After the filler reaches the end of its life, the entire water purifier cannot continue to be used, which greatly increases the cost of water purification. For example, the Chinese patent application number is: 201220092919.4, and the publication date is: the patent document on October 3, 2012, which discloses a portable water purifier, which includes a housing, a water-drawing pipe and a water-cleaning pipe, and the water-drawing pipe and The clean water pipes are all installed in the housing, and a water-absorbing chamber is formed in the water-absorbing pipe, an air-inflating device is provided on the upper part of the water-absorbing chamber, and a water-absorbing plastic pipe that can extend into a plastic bottle is connected to the lower part of the water-absorbing chamber. The water-absorbing plastic pipe is embedded with a one-way valve that allows the water in the plastic bottle to flow into the water-absorbing chamber; the water-drawing pipe and the water-purifying pipe are connected by a water-purifying plastic pipe, and one end of the water-purifying plastic pipe is connected to the water-absorbing chamber The other end is connected to the upper end of the water purification pipe, and the water purification plastic pipe is embedded with a one-way valve that allows the water in the water suction chamber to flow into the water purification pipe; the water purification pipe is provided with three layers of filter layers. From top to bottom are activated carbon layer, calcium sulfite layer and ultrafiltration membrane layer. The water purifier can remove the odor and pigment in the water through the activated carbon layer, calcium sulfite layer and ultrafiltration membrane layer in the water purification pipe, and can intercept macromolecular substances and impurities between 0.002-0.1 microns to purify the water , but the filler is difficult to replace and can only be used once. After a long time of use, the filler will be polluted, which will easily block the water purifier, causing secondary pollution, and the water purifier will not be able to continue to be used.

Of course, there are related designs for the convenient replacement of the filter element of the water purifier. For example, the Chinese patent application number is: 201610797171.0, and the publication date is: the patent document on December 7, 2016, which discloses a water purifier that is convenient for replacing the filter element. The water heater includes a main body, a filter cartridge, a filter element bracket and compressed activated carbon. A water inlet pipe is installed on the left side of the main body, and a fixing bar is installed on the left side of the front surface of the main body. The main body is connected with the control door through a hinge, and the control door A handle is installed on the front surface of the door, the filter element bracket is connected to the nut through a fixing seat, a circulation pipe is installed above the filter cartridge, a sewage pipe is installed below the filter cartridge, PP cotton is installed inside the filter cartridge, and Compressed activated carbon is installed on the right side of the PP cotton, and a reverse osmosis membrane is installed on the right side of the compressed activated carbon. This program is installed with a control door, and the front surface of the control door is provided with a lock hole, and the filter element can be replaced by opening the control door, which can overcome the trouble of replacing the filter element in the traditional water purifier that replaces the filter element, and is convenient for the user to replace the filter element. The volume of the structure is relatively large, and the structure is relatively complicated, so it is not suitable for outdoor carrying.

In addition, the current water purifier cannot be cleaned after the filler is polluted, the utilization rate of the filler is low, and the use cost is high; moreover, the heavy metals in the water cannot be effectively removed, and the water quality cannot meet the drinking water standard, which needs further improvement.

Contents of the invention

1. Problems to be solved

Aiming at the problems of low utilization rate and inconvenient replacement of fillers in existing portable water purifiers, the invention provides a portable water purifier and methods for water purification, backwashing and filler replacement thereof. Among them, the water purifier optimizes the structure of the packing cylinder. Under the premise of meeting the water purification requirements, it can backwash the packing, reduce the replacement frequency of the packing, prolong the use time of the packing, improve the utilization rate of the packing, and make the replacement of the packing easier. The water purification method and the water purifier can purify the sewage to the drinking water standard; the backwashing method can realize the flushing of the packing of the water purifier and prolong the service time of the packing; the packing replacement method can be used to replace the packing simply and quickly .

2. Technical solution

In order to solve the above problems, the present invention adopts the following technical solutions.

A portable water purifier, comprising a water drawing part and a filtering part, the water drawing part is used for drawing water and injecting water into the filtering part, and the filtering part is used for filtering the water injected from the water drawing part; the described water drawing part includes The water inlet cylinder has an internal thread at the lower end of the water inlet cylinder; the filter part includes a packing cylinder with openings at both ends, and a stud is connected to each of the two ends of the filler cylinder, and one of the studs is matched with the internal thread of the water inlet cylinder , and the other stud connects the tail cap with the water outlet.

As a further improvement, a filter screen is provided at one end of the stuffing cylinder.

As a further improvement, fillers are housed in the stuffing tube; an ultrafiltration membrane module is installed at the end of the stuffing tube away from the filter screen, and the ultrafiltration membrane module is covered with an isolation tube to isolate the filler on the outside of the isolation tube, and the side of the isolation tube A water hole is provided at the bottom of the wall.

As a further improvement, the ultrafiltration membrane module includes a connection head and an ultrafiltration membrane installed on the connection head; the double-ended stud is provided with a slot, and the connection head is installed in the slot and sealed by a sealing ring.

As a further improvement, a piston is provided in the water inlet cylinder; a one-way water inlet valve is provided at the lower part of the side wall of the water inlet cylinder for absorbing water; a one-way water outlet valve is provided at the lower end of the water inlet cylinder for passing the water in the water inlet cylinder into the stuffing barrel.

As a further improvement, the piston is connected to the handle through a push-pull rod.

The water purification method of the above-mentioned a kind of portable water purifier comprises the following steps:

① Connect the stud at one end of the packing tube where the filter is installed with the inner thread of the water inlet tube, and connect the stud at the other end of the stuffing tube with the end cap;

② Connect the one-way water inlet valve to the water to be purified through the pipeline;

③Pull the piston upwards, suck in the water to be purified through the one-way water inlet valve, and then push the piston down, and the water to be purified enters the stuffing cylinder through the one-way water outlet valve;

④The water to be purified entering the packing cylinder is filtered and purified by the filter screen, packing and ultrafiltration membrane in turn, and then discharged from the water outlet of the tail cover.

The above-mentioned backwashing method of a portable water purifier comprises the following steps:

① Connect the stud at one end of the stuffing tube where the ultrafiltration membrane module is installed with the inner thread of the water inlet tube, and connect the stud at the other end of the stuffing tube with the end cap;

② Connect the one-way water inlet valve to clean water through the pipeline;

③Pull the piston upwards, inhale clean water through the one-way water inlet valve, then push the piston down, and the clean water enters the stuffing cylinder through the one-way water outlet valve;

④ After the clean water entering the stuffing tube flushes the ultrafiltration membrane and packing, the backwashing water is discharged from the outlet of the tail cap.

The above-mentioned filling replacement method for a portable water purifier comprises the following steps: first unscrew the studs from the water inlet cylinder to separate the filling cylinder from the water inlet cylinder; then unscrew the studs from the filling cylinder , take out the filter screen, you can pour out the filler that has failed or is seriously blocked.

As a further improvement, when the filter membrane needs to be replaced, after pouring out the filler, first unscrew the tail cap, then unscrew the stud from the packing cylinder, and then remove the ultrafiltration membrane assembly from the stud, Replace with a new ultrafiltration membrane assembly.

3. Beneficial effects

Compared with the prior art, the beneficial effects of the present invention are:

(1) The portable water purifier of the present invention, by optimizing the structure of the packing cylinder of the filtering part, a stud stud is respectively installed at both ends of the packing cylinder, and one end of the water inlet cylinder of the drawing water part is provided with a double-ended The internal thread matched with the head stud, so that both ends of the packing cylinder can be easily connected to the water inlet cylinder, one end can be connected to achieve water purification, while the other end can be connected to realize backwashing operation, effectively reducing the frequency of packing replacement. Extend the use time of the packing and improve the utilization rate of the packing; in addition, the double-ended studs are used to block both ends of the packing cylinder, and the filling in the packing cylinder can be poured out only by removing the double-ended studs, which is convenient for replacement of new packing.

(2) Portable water purifier of the present invention, filter screen is arranged at one end in the filler cylinder, on the one hand, when purifying water, can carry out initial filtration to raw water, filter the big particle impurity in raw water; Blocking to prevent the filler from rushing out of the middle hole of the stud, causing the loss of the filler.

(3) In the portable water purifier of the present invention, the packing in the packing cylinder can adsorb and filter organic pollutants such as pesticides and NOM, and filter heavy metal ions such as manganese, aluminum, arsenic, and iron, and the ultrafiltration membrane module can effectively retain bacteria, protozoa, and viruses , colloid, fine particle suspended solids and other pollutants; and the isolation cylinder is used to isolate the ultrafiltration membrane module and the filler. On the one hand, it can ensure that the water flows through all the fillers before entering the ultrafiltration stage. Ensure that the water has sufficient hydraulic retention time in the packing section; on the other hand, it can protect the ultrafiltration membrane and prevent the hollow fiber membrane of the ultrafiltration membrane from being damaged.

(4) In the portable water purifier of the present invention, the ultrafiltration membrane module is installed in the slot hole of the double-ended stud through the connector, and is sealed with a sealing ring, which is easy to disassemble and assemble. Membrane components for easy and quick replacement.

(5) The portable water purifier of the present invention, the water drawing part adopts the piston to push and pull in the water inlet cylinder, cooperates with the one-way water inlet valve and the one-way water outlet valve to realize the extraction and delivery of water, the structure is simple, the cost is low, and the operation is reliable. It is also convenient to carry outdoors.

(6) In the portable water purifier of the present invention, the piston in the water drawing part is pushed and pulled by the handle to realize pumping and drainage, which is simple and convenient.

(7) The water purification and backwashing method of the portable water purifier of the present invention can realize the filtration and purification of raw water conveniently by connecting the two ends of the filler cylinder in the filter part with the water inlet cylinder in the water drawing part, and efficiently remove the water source Among organic matter, bacteria, protozoa, heavy metals and most viruses, the removal rate of COD is over 80%, the removal rate of total bacteria is over 99%, and the removal rate of heavy metals manganese, aluminum, arsenic and iron is over 80%. After purification, the water quality reaches Drinking water standard; and the backwash of the filler can flush out the pollutants trapped in the filler in time, and the service life of the filler is greatly extended.

(8) The filler replacement method of the portable water purifier of the present invention can conveniently and quickly replace the filler and the ultrafiltration membrane module.

Description of drawings

Fig. 1 is the structural representation of portable water purifier of the present invention;

Fig. 2 is a structural schematic diagram of the filtering part of the portable water purifier of the present invention.

Fig. 3 is the dismantling schematic diagram of filter part in the portable water purifier of the present invention

Fig. 4 is a schematic diagram of the backwashing of the portable water purifier of the present invention.

The labels in the accompanying drawings represent respectively:

1. Water drawing part; 11. Handle; 12. Push-pull rod; 13. Water inlet cylinder cover; 14. Water inlet cylinder; 15. Piston; 16. One-way water outlet valve; 17. One-way water inlet valve; 18. Water inlet; 19. Internal thread;

2. Filtration part; 21-22, double-headed stud; 23, packing; 24, isolation cylinder; 25, ultrafiltration membrane module; 26, sealing ring; 27, filter screen; 28, packing cylinder;

3. End cap; 31. Threaded end; 32. Water outlet.

Detailed ways

The following examples are used to explain the technical solutions of the present invention without limitation. Those skilled in the art can learn from the content of the invention, and appropriately change the structure, connection relationship, material, parameter, size, process and other links to achieve other corresponding goals. The relevant changes do not depart from the content of the present invention. All similar replacements and changes Everything that is obvious to those skilled in the art should be considered included within the scope of the present invention.

As shown in Figure 1, a portable water purifier mainly includes two parts: a water drawing part 1 and a filtering part 2, wherein the water drawing part 1 is used to draw raw water or clean water and inject the water into the filtering part 2, The filter part 2 is used to filter the raw water injected from the water drawing part 1 or to be washed with clean water. The two-part structure will be described in detail below.

In order to achieve high-precision filtration and purification of water, it is necessary to provide sufficient osmotic pressure. Commonly used pressure supply methods include manual piston supply pressure (CN106139905A, CN202808506U, CN205182292U), electric pump supply pressure (CN204779122, CN101005884A), squeeze water storage container supply pressure, etc. pressure (CN105502578A), extrusion air bag pressure supply (CN204454785U), mouth suction supply pressure (CN204981385U), gravity supply pressure (CN101732922A). The manual piston pressure supply operates stably, and the water pressure is high. It can provide a pressure range of 0.01-0.5Mpa, which can achieve continuous water purification; It is easily limited by the power supply; the pressure supply structure of the squeeze water storage container is simple, but long-term operation will easily cause hand pain, poor ergonomics experience and intermittent water intake; the mouth suction pressure supply structure is simple, but the pressure is too small to achieve high High-precision filtration, and there are certain safety hazards in the direct inlet of the effluent; the gravity pressure supply structure is simple, but the pressure provided is extremely small, the filtration speed is slow, and the filtration accuracy is not high. Considering that the conditions of outdoor use are complex and changeable, and that the ultrafiltration membrane used in the present invention requires sufficient operating pressure for water purification, the manual piston pressure supply method is adopted in this embodiment.

As shown in FIG. 1 , the water drawing part 1 includes a water inlet cylinder 14 , a piston 15 , a one-way water inlet valve 17 , a one-way water outlet valve 16 and a handle 11 . Wherein, the upper end opening of the water inlet cylinder 14, the piston 15 can be loaded into the water inlet cylinder 14 from the upper end opening, and then the upper end opening of the water inlet cylinder 14 is closed by the water inlet cylinder cover 13, so that a relatively closed space is formed in the water inlet cylinder 14, which is also the piston 15. The piston 15 is connected to the handle 11 through the pull rod 12, so that the handle 11 can be held to push the piston 15 to move back and forth; the lower end of the water inlet cylinder 14 is provided with an internal thread 19, which is used to connect the filter part 2, and it is also convenient to realize backwashing and The key to filter replacement will be described in detail later. In addition, the traditional manual piston pressure supply (CN106139905A, CN205182292U) uses steel balls to ensure the airtightness of the pressure supply part when water enters and exits, but the steel ball and its meshing parts will be worn after long-term use, resulting in the pressure supply part being unable to use normally. Therefore, this implementation adopts the one-way valve structure to replace the traditional steel ball to ensure that the pressure supply part of the water purifier can be used normally for a long time. Specifically, a water inlet 18 is provided near the bottom of the side wall of the water inlet cylinder 14, and a one-way water inlet valve 17 is installed in it, and its opening direction is from the outside of the water inlet cylinder 14 to the inside; the one-way water outlet valve 16 is installed on the water inlet cylinder 14. The lower end of the lower end is arranged along its axial direction, which can communicate the inner space of the water inlet cylinder 14 with the filter part 2, and its opening direction is from the inside of the water inlet cylinder 14 to the outside. When in use, the one-way water inlet valve 17 is connected to the water source through the pipeline, and the piston 15 is pulled up to draw water from the one-way water inlet valve 17 into the water inlet cylinder 14; The water outlet valve 16 discharges into the filter part 2, thereby realizing the water supply and drainage process.

As shown in FIG. 2 , the filter part 2 includes a stuffing cylinder 28 , two studs, a filter screen 27 and an ultrafiltration membrane assembly 25 . Wherein, the stuffing tube 28 is a cylindrical structure with openings at both ends, and threads are provided on the inner walls of the openings at both ends for connecting studs. and B-terminal. In this embodiment, the two studs are of the same size, which is convenient for generalization. The studs are provided with a through middle hole along the direction of the central axis, so that water can enter and flow out of the stuffing tube 28, and one of the studs 21 Installed on the A end of the stuffing tube 28, another stud 22 is installed on the B end of the stuffing tube 28, and both adopt sealing connection. Filter screen 27 is installed in the inner side of stuffing cylinder 28A end, and filter screen 27 is positioned at the end face of stuffing tube 28 near double-ended stud 21, so that after water passes through from double-ended stud 21, enters stuffing tube 28 after filtering through filter screen 27 Inside, the filler 23 is filled in the filler cylinder 28 . Here, the filter screen 27 adopts a stainless steel mesh. On the one hand, when purifying the water, the raw water can be filtered for the first time to filter large particles of impurities in the raw water; The middle hole of the head stud 21 is punched out, causing the filler 23 to be lost.

In this embodiment, filler 23 is a mixed filler of chitosan and activated carbon. Activated carbon can effectively adsorb organic pollutants such as pesticides and NOM, but the treatment effect on heavy metals is poor when only activated carbon is used. The heavy metals in the water source exceeded the standard due to dissolution and other reasons. Here, the common activated carbon filler layer was improved to a chitosan and activated carbon mixed filler layer. Chitosan is a natural polymer compound. The polymer chain segment contains -NH ₂ , -OH active groups, and forms a coordination compound with heavy metal ions. It can be used as a polymer adsorbent to adsorb heavy metal ions, and it is non-toxic and non-toxic. produce secondary pollution. The mixed packing of chitosan and activated carbon has three advantages: ①The mixed packing can remove heavy metals and organic matter at the same time, ensuring that the effluent water quality meets the drinking water standard; ②Compared with the layered packing, the mixed packing does not need to be added under the same purification volume The isolation layer reduces the dead angle, so the filler is more fully in contact with the raw water; ③The filling and replacement of the mixed filler are relatively simple.

The ultrafiltration membrane assembly 25 is arranged in the stuffing tube 28 and installed on the stud 22 at the B end of the stuffing tube 28 , that is, the stud 22 at the end of the stuffing tube 28 away from the filter screen 27 . Ultrafiltration is a high-precision water purification technology that has been widely used in the advanced treatment of drinking water. The average pore size of the membrane is 1 to 100 nanometers, which can effectively retain pollutants such as bacteria, protozoa, viruses, colloids, and fine particle suspensions. , Ultrafiltration requires a certain osmotic pressure, and the operating pressure is 0.1-0.5Mpa. According to the previous discussion, the manual piston pressure supply method can meet the operating pressure of ultrafiltration. In order to ensure the convenience of water purification and subsequent replacement at the same time, in this embodiment, the ultrafiltration membrane module 25 mainly includes a connector and a hollow fiber membrane installed on the connector. A sealing groove is provided on the connector, and a sealing groove is installed in the sealing groove. At the same time, a slot is provided on the end face of the double-ended stud 22, the slot communicates with the middle hole, and the ultrafiltration membrane assembly 25 can be installed by inserting the connector into the slot, and the sealing ring ensures the tightness of the connection. In addition, the ultrafiltration membrane assembly 25 is covered with an isolation cylinder 24, which isolates the filler 23 on the outside of the isolation cylinder 24, and the bottom of the side wall of the isolation cylinder 24, that is, near the intersection of the isolation cylinder 24 and the end face of the double-ended stud 22, A water hole is provided to connect the inside and outside of the isolation cylinder 24 . This kind of structural setting prevents short flow from occurring on the one hand. If the isolation cylinder 24 is not provided, the water entering from the A end will flow out of the filler cylinder 28 from the upper part of the ultrafiltration membrane after flowing through the upper region of the filler 23, and no water will flow through it. The lower filler 23 becomes a dead angle, resulting in a low utilization rate of the filler 23, so that it can ensure that the water flows through all the fillers 23 before entering the ultrafiltration stage, which not only ensures that the filler 23 can fully exert its water purification capacity, but also ensures that the water has sufficient hydraulic power in the filler section. The residence time; on the other hand, it supports and protects the ultrafiltration membrane. The hollow fiber membrane of the ultrafiltration membrane is relatively fragile, directly contacts with the particle packing layer, and is easily damaged by extrusion. The isolation cylinder 24 can protect the hollow fiber membrane from damage and damage .

End cap 3 is installed on the stud 22 at the stuffing tube 28B end, end cap 3 has threaded end 31, is installed on the stud 22 by this threaded end 31, and the middle of end cap 3 is provided with water outlet 32, and The middle hole of the double-ended stud 22 corresponds, so that the water in the stuffing tube 28 can pass through the double-ended stud 22 and be discharged through the water outlet 32 of the tail cover 3 .

The above-mentioned portable water purifier can be used to complete the purification treatment of raw water, the backwashing of the filler, and the replacement of the filler and the ultrafiltration membrane. The three operation methods are described separately below.

1. Water purification operation

As shown in Figure 1 and Figure 2, the operation steps are as follows:

① Connect the stud 21 at one end of the stuffing tube 28 where the filter screen 27 is installed with the internal thread 19 of the water inlet tube 14, and connect the stud 22 at the other end of the stuffing tube 28 with the tail cap 3;

② Connect the one-way water inlet valve 17 to the water to be purified through the pipeline;

③Pull the piston 15 upwards, inhale the water to be purified through the one-way water inlet valve 17, and then push the piston 15 downwards, and the water to be purified enters the packing cylinder 28 through the one-way water outlet valve 16;

④ The water to be purified entering the packing cylinder 28 is filtered and purified by the filter screen 27, the packing 23 and the ultrafiltration membrane in turn, and then discharged from the water outlet 32 of the tail cap 3, and purified clean water can be obtained.

2. Backwashing operation

As shown in Figure 4, the operation steps are as follows:

① Connect the stud 22 at one end of the stuffing tube 28 where the ultrafiltration membrane module 25 is installed with the internal thread 19 of the water inlet tube 14, and connect the stud 22 at the other end of the stuffing tube 28 with the end cap 3;

② Connect the one-way water inlet valve 17 to clean water through the pipeline;

③Pull the piston 15 upwards, inhale clean water through the one-way water inlet valve 17, then push the piston 15 downwards, and the clean water enters the stuffing cylinder 28 through the one-way water outlet valve 16;

④ The clean water entering the stuffing cylinder 28 flows from the inside of the hollow fiber membrane to the outside of the membrane under a certain osmotic pressure, and the pollutants accumulated on the surface of the membrane are washed away during the water inlet process to realize the backwashing of the ultrafiltration membrane module 25; The water that comes out enters the packing 23 through the isolation net 24, and the pollutants accumulated in the packing 23 are washed, and the water after washing flows from the middle hole of the stud 21 to the end cover 3, and the backwash water in the end cover 3 is discharged from the water outlet 32 flow out, it can be backwashed.

3. Packing replacement operation

As shown in Figure 3, the operation steps are as follows: first unscrew the double-ended stud 21 from the water inlet cylinder 14 to separate the packing cylinder 28 from the water inlet cylinder 14; then unscrew the double-ended stud 21 from the filler cylinder 28 , take out the filter screen 27, you can pour out the filler that has failed or is seriously blocked, and you can replace the new filler 23 again. In addition, when the filter membrane needs to be replaced, after the filler 23 is poured out, the tail cap 3 is unscrewed first, and then the stud 22 is unscrewed from the filler cylinder 28. Therefore, the ultrafiltration membrane assembly 25 can be taken out together when the double-head screw 22 is unscrewed;

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

Example 1

In this embodiment, the above-mentioned water purifier is used to purify the raw water. The cross-sectional area of the piston 15 is 2 cm ² , and the working pressure provided by the water inlet cylinder 14 under the action of 40 N force is 0.2 MPa, which meets the requirements for normal operation of ultrafiltration. osmotic pressure. In filler 23, volume of activated carbon: volume of chitosan=3:1, activated carbon is coconut shell activated carbon, mesh number 20-40 mesh, chitosan filler 18-30 mesh, total volume of filler 23 is 200mL. Filter screen 27 meshes are less than 10 meshes. Ultrafiltration membrane module 25 adopts microfiltration membrane with a pore size of 10-30nm, operating pressure: 0.1-0.2MPa, design membrane flux: 25L/m ² ·h, membrane service life ≥ 5 years, and membrane strength > 200N/monofilament. It is estimated that the membrane area used is 1m ² , the designed water flow rate is about 400ml/min, and the filter membrane is a cylinder of Φ2.5cm*15cm.

Carry out actual verification on the edge of a certain river. The water inlet pipe is externally connected to the one-way water inlet valve 17 of the water inlet 18, put the water inlet pipe into the river water, pull the handle 11 upwards, and the water enters the water inlet cylinder 14 from the water inlet pipe through the water inlet one-way valve 17, and then presses down Handle 11, water flows to packing cylinder 28 through one-way water outlet valve 16. The flow direction of water in the filler cylinder 28 is shown in the direction of the arrow in Figure 2: the water enters through the middle water hole of the double-ended stud 21, and flows to the filler 23 after being roughly filtered by the filter screen 27. The filler 23 can effectively remove heavy metals and organic pollution. After flowing through all the particle packing layers, the water enters the water purification section of the ultrafiltration membrane from the water hole of the isolation cylinder. Ultrafiltration can effectively remove pollutants such as bacteria, protozoa, viruses, colloids, fine particle suspended solids, and macromolecular organic matter. After being purified by the ultrafiltration membrane module 25, it flows from the middle hole of the double-ended stud 22 to the tail cap 3; the water in the tail cap 3 flows out from the water outlet 32, and purified clean water can be obtained. Test the water quality before and after purification. The test results are shown in Table 1. The test results prove that the purified water meets the "Drinking Water Sanitation Standard" GB5749-2006, and the purified water can be used as drinking water.

Table 1 Detection of water purification effect of portable water purifier

After purification, perform backwashing and packing replacement operations.

Backwashing: After filtering about 50L of water, you will feel that the resistance increases when you push the piston 15, indicating that the pollutants trapped in the stuffing cylinder 28 have accumulated too much, and backwashing is required. As shown in Figure 1, unscrew the water inlet cylinder 14 connected by the double-ended stud 21 and the stuffing cylinder 28, then unscrew the stuffing cylinder 28 connected by the double-ended stud 22 and the end cap 3, and turn the stuffing cylinder 28 upside down by 180° The A end and the B end are reversed, that is, the stud 22 of the B end is tightened with the water inlet cylinder 14, and the stud 21 of the A end is tightened with the tail cap 3 . Connect the water inlet pipe to the water inlet 18, put the water inlet pipe into the previously purified water, pull the handle 11 upward, the water enters the water inlet cylinder 14 from the water inlet pipe through the water inlet check valve 17, and then press down on the handle 11, the water passes through The one-way water outlet valve 16 flows to the packing cylinder 28 . Water enters through the middle hole of the double-ended stud 22, and the water flows from the inside of the hollow fiber membrane to the outside of the membrane under a certain osmotic pressure, and the pollutants accumulated on the surface of the membrane are washed away during the water intake process, realizing the backwashing of the ultrafiltration membrane module 25 . The water from the ultrafiltration membrane enters the packing 23 from the isolation cylinder 24 to flush the pollutants accumulated in the packing 23. The water after flushing flows from the middle hole of the stud 21 to the tail cap 3, and the backwash water in the tail cap is automatically The water outlet 32 flows out. In the initial stage of backwashing, it can be seen that the backwashing water is extremely turbid, and the backwashing water becomes clearer and clearer during the continuous backwashing process. When the backwashing water volume is 2L, the backwashing water is completely clear, and the backwashing is over at this time. Turn the water purifier back to normal water purification mode.

Packing membrane replacement: When the resistance to push the piston 15 is still high after backwashing, it indicates that the packing or filter membrane has been seriously clogged, and the filler or filter membrane needs to be replaced. As shown in FIG. 1 , unscrew the water inlet cylinder 14 connected by the double-ended stud 21 and the stuffing cylinder 28 , and then unscrew the stuffing cylinder 28 connected by the double-ended stud 22 and the tail cap 3 . As shown in Figure 3, unscrew the double-ended stud 21 at the A end to take out the filter screen 27. After taking out the filter screen 27, you can pour out the filler that has failed or is severely blocked, and unscrew the double-ended thread 22 at the B end. The ultrafiltration membrane assembly 25 can be pulled out from the double thread 22 by holding the root of the ultrafiltration membrane assembly 25 with appropriate force. When the ultrafiltration membrane is clogged or seriously polluted, the ultrafiltration membrane can be replaced, a new ultrafiltration membrane module 25 is inserted into the double thread 22, and the isolation cylinder 24 is placed on the ultrafiltration membrane module 25 to protect the hollow fiber membrane from being damaged. If it is damaged, assemble and tighten the double thread 22 and the B end of the stuffing tube, install the filler 23 from the A end of the stuffing tube, put the filter screen 27 on the newly installed filler, screw on the double-ended stud 21, and the stuffing tube 28 is completed. assembly. Tighten the end B of the assembled packing tube 28 and the end cap 3 through threads, and tighten the A end of the assembled packing tube and the water inlet tube 1 through threads, so far the replacement of the ultrafiltration membrane and packing of the water purifier is completed, and the water purification device can be used normally.

It is worth noting that, for those skilled in the art, under the inspiration of the concept of the present invention and specific embodiments, some deformations that can be directly derived or associated from the disclosure of the present invention and common sense will be realized by those skilled in the art. Other methods can be used, or the replacement of common known technologies in the prior art, and insubstantial changes such as different combinations of features, etc., can also be applied, and the functions and effects described in the present invention can be realized, and no longer A detailed description of an example all belongs to the protection scope of the present invention.

Claims (8)

1. A portable water purifier comprises a water-drawing part (1) and a filter part (2), the water-drawing part (1) is used for drawing water and injecting water into the filter part (2), and the filter part (2) uses For filtering the water injected from the water drawing part (1), it is characterized in that: the water drawing part (1) includes a water inlet cylinder (14), and the lower end of the water inlet cylinder (14) has an internal thread (19); Filtration part (2) comprises the stuffing cylinder (28) of two ends opening, and the two ends of stuffing cylinder (28) respectively connect a stud (21,22), wherein a stud (21) and water inlet cylinder ( 14) of the internal thread (19), another double-ended stud (22) is connected to the tail cap (3) with the water outlet (32); one end in the stuffing tube (28) is provided with a filter screen (27 ); Filler (23) is housed in described stuffing cylinder (28); Ultrafiltration membrane module (25) is installed far away from one end of filter screen (27) in described stuffing cylinder (28), ultrafiltration membrane module (25) outer cover has The isolation cylinder (24) isolates the filler (23) on the outside of the isolation cylinder (24), and the bottom of the side wall of the isolation cylinder (24) offers water holes. 2. A kind of portable water purifier according to claim 1, is characterized in that: described ultrafiltration membrane assembly (25) comprises connector and the ultrafiltration membrane that is installed on the connector; Described stud ( 22) A slotted hole is provided, and the connector is installed in the slotted hole and sealed by a sealing ring (26). 3. A portable water purifier according to claim 2, characterized in that: a piston (15) is arranged in the water inlet cylinder (14); a one-way water inlet valve is arranged at the lower part of the side wall of the water inlet cylinder (14) (17), is used for water absorption; The lower end in the water inlet cylinder (14) is provided with one-way water outlet valve (16), is used for passing in the water inlet cylinder (14) in the stuffing cylinder (28). 4. A portable water purifier according to claim 3, characterized in that: the piston (15) is connected to the handle (11) through a push-pull rod (12). 5. the water purification method of a kind of portable water purifier described in claim 3, comprises the following steps: ① Connect the stud (21) at one end of the packing tube (28) where the filter screen (27) is installed with the internal thread (19) of the water inlet tube (14), and the stud at the other end of the stuffing tube (28) (22) is connected with tail cap (3); ② Connect the one-way water inlet valve (17) to the water to be purified through the pipeline; ③Pull the piston (15) upwards, suck in the water to be purified through the one-way water inlet valve (17), then push the piston (15) downwards, and the water to be purified enters the stuffing cylinder (28) through the one-way water outlet valve (16) ); ④The water to be purified entering the stuffing cylinder (28) is discharged from the water outlet (32) of the end cap (3) after being filtered and purified by the filter screen (27), the packing (23) and the ultrafiltration membrane successively. 6. the backwashing method of a kind of portable water purifier described in claim 3, comprises the following steps: ① Connect the studs (22) at one end of the stuffing tube (28) where the ultrafiltration membrane module (25) is installed with the internal thread (19) of the water inlet tube (14), and the double-headed studs (28) at the other end of the stuffing tube (28) Stud (21) is connected with tail cap (3); ② Connect the one-way water inlet valve (17) to clean water through the pipeline; ③Pull the piston (15) upwards, inhale clean water through the one-way water inlet valve (17), then push the piston (15) downward, and the clean water enters the stuffing cylinder (28) through the one-way water outlet valve (16); ④ After the clean water entering the stuffing cylinder (28) flushes the ultrafiltration membrane and stuffing (23), the backwashing water is discharged from the water outlet (32) of the tail cap (3). 7. The packing replacement method of a portable water purifier according to claim 3, comprising the following steps: first unscrew the stud (21) from the water inlet cylinder (14), and make the filler cylinder (28) and the inlet The water cylinder (14) is separated; then the studs (21) are unscrewed from the packing cylinder (28), and the filter screen (27) is taken out, so that the filler that has failed or is seriously blocked can be poured out. 8. A method for replacing the packing of a portable water purifier according to claim 7, characterized in that: when the filter membrane needs to be replaced, after pouring out the packing, first unscrew the tail cap (3), and then put the double head The stud (22) is unscrewed from the packing tube (28), and then the ultrafiltration membrane assembly (25) is taken off from the double-ended stud (22), and a new ultrafiltration membrane assembly (25) is replaced.