CN209952346U - Back flush filter - Google Patents

Abstract

The utility model discloses a back flush filter relates to and filters technical field, and its technical scheme main points are: including the barrel, UNICOM in the inlet tube and the outlet pipe of barrel, rotate the filter core of connecting in the barrel, set up in the end cover of barrel upper end, barrel upper portion twines to be formed with the opening, and the drain of UNICOM barrel inner chamber is seted up to the barrel bottom, and the drain has threaded connection metal covering, and metal covering UNICOM in the barrel inner chamber, thereby the blowdown spare on the drain can reciprocate according to the rotation of end cover and close or open the drain. During the washing with the end cover to the rotatory 180 degrees of anticlockwise, thereby the water of the rotatory 180 degrees water inlets of end cover also can be followed to runner and filter core inner chamber UNICOM can directly get into the inside of crossing the filter core, and the drain opens simultaneously, flows to the outside of filter core by the filter core inner chamber again, alright strike the impurity attached to the filter core surface to the barrel inner chamber, and the impurity of barrel inner chamber alright discharge filter through the drain at last, and the cleaning performance of this scheme is better.

Description

A backwash filter

technical field

The utility model relates to the technical field of filtration, in particular to a backwash filter.

Background technique

The pre-filter is a water purification product for the main pipeline. It is installed in any water pipe after the water meter and before the first faucet in the home. The pre-filter ensures that a large amount of precipitated impurities generated in the water supply pipe network will not cause harm to the human body. It also plays a pre-protection role for water pipes and wading equipment installed on the water pipes (such as water softeners, water purifiers, pure water machines or direct drinking machines, etc.).

At present, the Chinese patent with the publication number of CN204841110U discloses a pre-filter, which includes a cylinder body, a filter core, a cover body and a copper core drain valve. The cylinder body is screwed to the upper cover body, and a filter core is arranged in the cylinder body. , The cylinder body and the filter element are integrated opening structure, one end of the cylinder body is the water inlet, the other end of the cylinder body is the water outlet, the lower end of the cylinder body is installed with a copper core drain valve, and the lower end of the copper core drain valve is the drain outlet. ; When the filter is working, the water flow guide valve is in the open state, the water flow enters the filter from the inlet, and is filtered to the outlet through the filter element, and the dirt and impurities in the water are intercepted by the filter element.

The above technical solution has the following defects: when the filter needs to discharge sewage, the sewage valve needs to be opened, and part of the water flows into the filter element after being filtered, and part of the water flows downward and is discharged from the sewage outlet. The filter element is cleaned, but this process only relies on the downward flow of water to clean the filter element, and the dirt stuck in the filter hole of the filter element is difficult to be washed off, resulting in poor cleaning effect of the filter element.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a backwash filter, which has the advantage of good cleaning effect.

The above technical purpose of the present utility model is achieved through the following technical solutions: a backwash filter, comprising a cylinder with an inner cavity, a water inlet pipe and a water outlet connected to the inner cavity of the cylinder, and a rotatable connection to the The filter element in the cylinder, the cylinder is provided with a sewage outlet communicating with the inner cavity of the cylinder, the cylinder is also provided with an opening, one end of the filter element protrudes from the opening, and the filter element is provided with a flow One end of the flow channel is communicated with the inner cavity of the filter element, and the other end of the flow channel is communicated with the water inlet pipe or the water outlet pipe, and also includes an end cover that covers the opening of the cylinder and is slidably connected to the water inlet pipe or the water outlet pipe. A sewage discharge member on the filter element, the end cap is fixedly connected to the filter element, one end of the sewage discharge member is slidably connected to the filter element, and the sewage discharge member and the filter element are circumferentially fixed, and the other end of the sewage discharge member It is a pipe one with an external thread, a through hole one is opened on the side wall of the pipe one, the through hole one is communicated with the pipe one, and the sewage discharge member is threadedly connected to the sewage discharge port.

Through the above technical solution, the flow channel is connected with the water outlet pipe, the raw water flows into the cylinder through the water inlet pipe, and then flows into the inner cavity of the filter element after being filtered by the filter element, and then flows out through the water outlet pipe; when cleaning, the end cover can be rotated 180 counterclockwise. At this time, the flow channel on the filter element is connected with the water inlet pipe, and the water flow can flow to the inner cavity of the filter element through the water inlet pipe, and then flow out from the inner cavity of the filter element, and the impurities attached to the surface of the filter element can be impacted to the inner cavity of the cylinder, and at the same time the end The cover will drive the filter element to rotate, and the filter element will then drive the drain element to move toward the filter element. At this time, the first tube communicates with the inner cavity of the cylinder, and the impurities in the inner cavity of the cylinder can be discharged from the inner cavity of the cylinder through the through hole on the first tube. The cleaning effect of this solution is better. good.

Preferably, a protruding platform is formed in the enlarged diameter of the middle part of the sewage discharge member, the protruding platform covers the sewage outlet, and the protruding platform is located above the first through hole.

Through the above technical solution, the sewage discharge member is threadedly connected to the sewage discharge port, and the boss provided on the sewage discharge member can cover and seal the sewage discharge port when the filter is working normally. The filter element moves in the direction, and the boss can cooperate with the filter element to limit the sewage parts to ensure that the sewage parts will not fall off from the sewage outlet.

Preferably, the boss is reduced in diameter toward the side of the sewage outlet, an annular groove 1 is formed on the side wall of the boss, and a sealing ring is arranged inside the groove 1.

Through the above technical solution, the end of the boss away from the filter element is provided with an inclined surface, and a sealing ring is provided on the inclined surface to ensure that the sewage discharge member can well seal the sewage discharge port.

Preferably, the sewage outlet is provided with a metal sleeve for threaded connection with the sewage discharge member.

Through the above technical solution, the metal sleeve is arranged in the sewage outlet, which ensures the strength of the threaded connection between the sewage discharge part and the metal sleeve, and increases the service life of the filter. The entire barrel needs to be replaced.

Preferably, a hose is provided in the flow channel, the hose protrudes from the flow channel, and the hose is used to abut the water inlet pipe or the water outlet pipe.

Through the above technical solution, a hose is arranged in the flow channel, and the hose protrudes from the flow channel, so that when the flow channel is communicated with the water inlet pipe or the water outlet pipe, the connection between the flow channel and the water inlet pipe or the water outlet pipe can be well sealed position, to ensure that when the filter is working normally, unfiltered water will not flow into the outlet pipe.

Preferably, an elastic member is provided in the flow channel, and the elastic member is used to apply elastic force to the hose, so that the hose is pressed against the water inlet pipe or the water outlet pipe.

Through the above technical solution, an elastic member is arranged in the flow channel, the two ends of the elastic member are respectively against the hose and the filter element, and the elastic member applies elastic force to the hose, so that the hose is pressed against the water inlet pipe or the water outlet pipe, and can be more Seal the connection between the runner and the inlet or outlet pipes well.

Preferably, a plurality of raised ribs are provided at the inner wall of the cylinder body close to the sewage outlet, and the raised ribs abut against the bottom of the filter element.

Through the above technical solution, a rib 1 is provided on the inner wall of the sewage outlet of the cylinder, so that the filter element can be placed on the rib 1, so as to ensure that the filter element will not sag, and prevent the end cover from being pressed against the cylinder body. In this way, when the end cover is rotated Could be easier.

Preferably, a gasket is provided at the bottom of the filter element, and one end of the gasket is in conflict with the rib.

Through the above technical solution, the bottom of the filter element is provided with a gasket, and during the process of rotating the end cover, the bottom of the filter element will not rub against the raised ribs, which increases the service life of the filter element.

Description of drawings

1 is a schematic cross-sectional view of an embodiment, mainly for showing the composition of the embodiment;

Figure 2 is a schematic cross-sectional view of the cylinder, mainly for showing the composition of the cylinder;

Figure 3 is an exploded schematic diagram of the filter element and the sewage discharge part, which is mainly used to show the composition of the filter element and the sewage discharge part.

Reference numerals: 1. Cylinder body; 2. Water inlet pipe; 3. Water outlet pipe; 4. Filter element; 5. Sewage outlet; 6. Opening; 7. Flow channel; 8. End cap; One; 11, through hole one; 12, boss; 13, groove one; 14, sealing ring; 15, metal sleeve; 16, hose; 17, elastic part; 18, rib one; 19, gasket; 20. Rib 2; 21. Slot 2; 22. Through hole 2; 23. Spring.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

A backwash filter, as shown in Figures 1 to 3, includes a cylinder body 1 with an inner cavity, a water inlet pipe 2 integrally formed with the cylinder body 1 and connected to the inner cavity of the cylinder body 1, and an integrally formed and cylinder body 2. The water outlet pipe 3 on the body 1 and opposite to the water inlet pipe 2 , the filter element 4 rotatably connected to the cylinder body 1 , and the end cover 8 arranged on the upper end of the cylinder body 1 .

The upper part of the cylinder body 1 is formed with an opening 6, the top of the cylinder body 1 is made of metal, the bottom of the cylinder body 1 is made of transparent plastic, and the bottom of the cylinder body 1 is provided with a sewage outlet 5 that communicates with the inner cavity of the cylinder body 1, and the sewage outlet 5 A metal sleeve 15 is threadedly connected, and the metal sleeve 15 is communicated with the inner cavity of the cylinder body 1; the inner wall of the cylinder body 1 is provided with a number of convex ribs 18, and the plurality of convex ribs are evenly distributed on the inner wall of the cylinder body. Above the sewage outlet 5.

The upper part of the filter element 4 is provided with a number of convex ribs 20, and the convex ribs 2 20 are pressed against the inner wall of the cylinder body 1 to axially fix the filter element 4. One end of the filter element 4 protrudes from the opening 6 and is fixedly connected with the end cover 8, so that the filter element 4 can be Driven by the end cover 8, it rotates in the cylinder body 1. The bottom of the filter element 4 is sealed, and the bottom of the filter element 4 is provided with a second groove 21; the bottom of the filter element 4 is provided with a gasket 19, the gasket 19 abuts against the ribs on the inner wall of the cylinder 1, and the gasket 19 is provided with a communication with the second groove 21. 22 of the through hole II.

The inside of the filter element 4 is provided with a flow channel 7. One end of the flow channel 7 is connected to the inner cavity of the filter element 4. The other end of the flow channel 7 is used to communicate with the water inlet pipe 2 or the water outlet pipe 3. The flow channel 7 is provided with a hose 16. The hose 16 An elastic member 17 is arranged between it and the inner wall of the flow channel 7. The elastic member 17 is a spring 23 in this embodiment. Under the elastic force of the spring 23, the hose 16 protrudes from the filter element 4 and is pressed against the water inlet pipe 2 or the water outlet pipe. 3, so that the hose 16 seals the connection between the flow channel 7 and the water inlet pipe 2 or the water outlet pipe 3.

The backwash filter also includes a sewage discharge member 9. One end of the sewage discharge member 9 is slidably connected to the second groove 21 and is circumferentially fixed with the second groove 21. The other end of the sewage discharge member 9 is a pipe one 10 with an external thread. 10 is threadedly connected to the metal sleeve, a through hole 11 is opened on the side wall of the pipe one 10, and the through hole one 11 is communicated with the inner cavity of the pipe one 10; 12 is located above the through hole 11, the top surface of the boss 12 is pressed against the bottom surface of the filter element 4, the boss 12 is reduced in diameter to the side of the sewage outlet 5 to form a slope, and the slope can effectively seal the interface of the metal sleeve 15, the boss An annular groove one 13 is opened on the side wall of 12, and a sealing ring 14 is arranged in the groove one 13, so as to better seal the gap between the sewage discharge member 9 and the metal sleeve 15. When the sewage drain 9 and the metal sleeve 15 are screwed tightly, the metal sleeve 15 covers the through hole 11, and the boss 12 seals the metal sleeve 15, and the sewage outlet 5 is sealed at this time; At this time, the sewage discharge member 9 rises along the groove two 21 and abuts against the bottom of the filter element 4. At this time, the through hole one 11 communicates the inner cavity of the tube one 10 with the inner cavity of the cylinder 1 to realize the function of sewage discharge.

A backwash filter works as follows:

After the user installs the backwash filter, open the main water inlet valve, and the filter starts to work normally. At this time, the flow channel 7 on the filter element 4 is connected to the water outlet pipe 3 . After the filter works for a period of time, the user can clearly see the impurities filtered by the filter element 4 through the transparent cylinder 1. If the accumulated impurities affect the water output and water pressure of the household water equipment, turn the end cover 8 counterclockwise. Rotating 180 degrees, the end cover 8 will drive the flow channel 7 to communicate with the water inlet pipe 2, and the thread on the metal sleeve 15 pushes the sewage discharge member 9 into the second groove 21. The water flows from the inside of the filter element 4 to the outside, flushes the attachments on the side wall of the filter element 4 to the inner cavity of the cylinder body 1, and then discharges the filter from the pipe 1 10 to realize the cleaning function; Rotate the flow channel 7 clockwise by 180 degrees and connect it to the outlet pipe 3. At the same time, the end cover 8 drives the sewage discharge part 9 to seal the thread with the metal sleeve 15, and the filter starts to work normally.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the protection scope of the present invention, which is determined by the appended claims.

Claims (8)

1. The utility model provides a back flush filter, including barrel (1), the UNICOM that has the inner chamber in inlet tube (2) and outlet pipe (3), the rotation of barrel (1) inner chamber connect in filter core (4) in barrel (1), seted up the UNICOM on barrel (1) drain (5) of barrel (1) inner chamber, still be provided with opening (6) on barrel (1), filter core (4) one end salient in opening (6), characterized by: a flow passage (7) is arranged on the filter element (4), one end of the flow passage (7) is communicated with the inner cavity of the filter element (4), the other end of the flow passage (7) is communicated with the water inlet pipe (2) or the water outlet pipe (3), and the water purifier also comprises an end cover (8) for covering the opening (6) of the cylinder body (1) and a sewage discharging part (9) which is connected to the filter element (4) in a sliding way, the end cover (8) is fixedly connected with the filter element (4), one end of the sewage discharging piece (9) is connected with the filter element (4) in a sliding way, the blowdown part (9) and the filter element (4) are circumferentially fixed, the other end of the blowdown part (9) is a first pipe (10) with external threads, the side wall of the first pipe (10) is provided with a first through hole (11), the first through hole (11) is communicated with the first pipe (10), and the sewage discharging part (9) is in threaded connection with the sewage discharging port (5).

2. The backwash filter as defined in claim 1, wherein: the middle part of the sewage discharging part (9) is expanded to form a boss (12), the boss (12) covers the sewage discharging opening (5), and the boss (12) is located above the first through hole (11).

3. The backwash filter as defined in claim 2, wherein: the boss (12) is reduced in diameter towards one side of the sewage draining outlet (5), an annular groove I (13) is formed in the side wall of the boss (12), and a sealing ring (14) is arranged inside the groove I (13).

4. The backwash filter as defined in claim 1, wherein: the sewage draining port (5) is provided with a metal sleeve (15) which is in threaded connection with the sewage draining part (9).

5. The backwash filter as defined in claim 1, wherein: a hose (16) is arranged in the flow channel (7), the hose (16) protrudes out of the flow channel (7), and the hose (16) is tightly propped against the water inlet pipe (2) or the water outlet pipe (3).

6. The backwash filter as defined in claim 5, wherein: an elastic part (17) is arranged in the flow channel (7), and the elastic part (17) is used for applying elastic force to the hose (16) so that the hose (16) is abutted against the water inlet pipe (2) or the water outlet pipe (3).

7. The backwash filter as defined in claim 1, wherein: a plurality of first convex ribs (18) are arranged on the inner wall of the barrel (1) close to the sewage draining exit (5), and the first convex ribs (18) are abutted to the bottom of the filter element (4).

8. The backwash filter as defined in claim 7, wherein: a gasket (19) is arranged at the bottom of the filter element (4), and one end of the gasket (19) is abutted to the first convex rib (18).

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