A pre-filter

Abstract

The application relates to the technical field of filters, and a pre-filter which comprises a valve head, a filter bottle, a filter core and a blowdown ball valve. The lower end of the valve head is provided with a containing cavity, a baffle ring is connected to the upper cavity wall of the containing cavity, the baffle ring divides the containing cavity into a water inlet cavity and a water outlet cavity, the water inlet cavity is located on the inner side of the baffle ring, the valve head is provided with a water inlet opening which is in communication with the water inlet cavity, the valve head is provided with a water outlet opening which is in communication with the water outlet cavity, the filter bottle is connected to the valve head, the filter bottle is provided with a filter cavity which is in communication with the containing cavity, one end of the filter core is embedded in the water inlet cavity, the other end of the filter core abuts against the bottom of the filter cavity, the bottom of the filter cavity is provided with a blowdown opening, the blowdown ball valve is connected to the filter bottle, and the blowdown ball valve is in communication with the blowdown opening. When the filter core needs to be cleaned, the blowdown ball valve is opened, the blowdown opening is connected to the outside, water flows into the water inlet cavity from the water inlet opening, and then flows to the inner side of the filter core, so that dirt adhered to the inner side of the filter core is washed away and separated from the filter core, and then is discharged from the blowdown opening, thereby realizing the cleaning of the filter core and improving the cleaning efficiency.

Description

Technical Field

[0001] This application relates to the technical field of filters, and more particularly to a pre-filter. Background Technology

[0002] A pre-filter is the first coarse filtration device for the whole house's water supply. It can filter out large particles such as sediment and rust from tap water. It is usually installed at the beginning of the pipe. Water in the pipe first enters the filter cartridge through the inlet of the pre-filter, and then flows out from the outlet after being filtered by the filter cartridge. During the filtration process, the filter pores on the filter cartridge constantly come into contact with impurities. While dirt is being filtered, some of it remains and adheres to the filter pores. Over time, the filter pores gradually become filled with dirt, causing the channels for water flow to gradually narrow. In severe cases, the water flow will be completely blocked inside the filter cartridge, and the water cannot flow out of the filter cartridge and into the outlet of the pre-filter, causing the pre-filter to malfunction. Traditional pre-filters require the entire filter cartridge to be removed to clean the filter pores. Therefore, the pre-filter must be removed from the piping system before the filter cartridge can be cleaned, which is extremely troublesome and results in very low cleaning efficiency. Utility Model Content

[0003] In order to clean the filter element without removing it and improve the efficiency of the filter, this application provides a pre-filter.

[0004] The pre-filter provided in this application adopts the following technical solution: A pre-filter includes a valve head, a filter bottle, a filter element, and a drain ball valve. The lower end of the valve head has a receiving cavity. A retaining ring is connected to the upper wall of the receiving cavity, dividing it into an inlet cavity and an outlet cavity. The inlet cavity is located inside the retaining ring. The valve head has an inlet port connected to the inlet cavity. The valve head also has an outlet port connected to the outlet cavity. The filter bottle is connected to the valve head and covers the opening of the receiving cavity. The filter bottle has a filtration cavity connected to the receiving cavity. One end of the filter element is embedded in the inlet cavity, which is connected to the inner side of the filter element. The other end of the filter element abuts against the bottom of the filtration cavity. The bottom of the filtration cavity has a drain port connecting the inner side of the filter element to the outside. The drain ball valve is connected to the filter bottle and is connected to the drain port.

[0005] By adopting the above technical solution, when the filter element needs to be cleaned, the drain ball valve is opened to connect the drain port to the outside. Water flows into the inlet chamber from the inlet and then flows to the inside of the filter element, flushing away the dirt adhering to the inside of the filter element, causing it to detach from the filter element and be discharged from the drain port, thus cleaning the filter element and improving cleaning efficiency.

[0006] Preferably, the end of the drain ball valve away from the filter bottle is connected to a connecting pipe; the connecting pipe is connected to the drain ball valve; a connecting ring is coaxially connected to the outer periphery of the connecting pipe; the connecting ring is used for quick coupling connection.

[0007] By adopting the above technical solution, it is easy to connect external pipelines to the sewage ball valve through quick couplings, so that the liquid used to flush out dirt can be used to clean other areas, thereby improving the utilization rate of water resources.

[0008] Preferably, it also includes a pressure gauge; the pressure gauge is connected to the valve head; the pressure gauge is used to detect the pressure in the inlet chamber.

[0009] By adopting the above technical solution, the water pressure in the inlet chamber is displayed by a pressure gauge to determine whether there is filter blockage, which causes the water pressure in the inlet chamber to rise, so as to remind people to clean the filter in time.

[0010] Preferably, the filter chamber has a limiting groove on the side wall near the valve head; the valve head is threaded into the limiting groove.

[0011] By adopting the above technical solution, a limiting groove is set, and the valve head is threadedly connected in the limiting groove, which reduces the possibility of water leakage between the valve head and the filter bottle and improves the sealing performance between the valve head and the filter bottle.

[0012] Preferably, the retaining ring has an upper groove on the inner wall near the filter bottle; the bottom of the filter chamber has a lower groove; the filter element is connected to an upper ring at one end near the valve head; the upper ring is located in the upper groove; the other end of the filter element is connected to a lower ring; the lower ring is embedded in the lower groove.

[0013] By adopting the above technical solution, an upper groove, a lower groove, an upper ring, and a lower ring are set to improve the stability of the connection between the filter element and the valve head and filter bottle, and reduce the possibility of the filter element shifting due to water flow impact, which could cause the filtration effect to fail.

[0014] Preferably, it also includes a stainless steel filter screen; the stainless steel filter screen is sleeved on the outer periphery of the filter element; the two ends of the stainless steel filter screen are respectively connected to an upper insert ring and a lower insert ring.

[0015] By adopting the above technical solution, a stainless steel filter screen is fitted around the outer periphery of the filter element, and the two ends of the stainless steel filter screen are respectively connected to the upper and lower embedded rings, which helps to improve the structural strength of the filter element and extend its service life.

[0016] Preferably, it further includes a cleaning assembly; the cleaning assembly includes a rotating shaft, blades, and an impeller; the rotating shaft is rotatably connected to a valve head; the rotation axis of the rotating shaft coincides with the axis of the filter element; the impeller is coaxially connected to the end of the rotating shaft near the valve head; the impeller is embedded in the water inlet chamber; a guide plate is connected to the upper wall of the water inlet chamber; one end of the guide plate along its length is fixedly connected to the wall of the water inlet chamber; both ends of the guide plate are located on both sides of the impeller's rotation axis; the blades are connected to the outer periphery of the rotating shaft; the end of the blade away from the rotating shaft is in contact with the inner wall of the filter element.

[0017] By adopting the above technical solution, when the water in the inlet pipe flows along the guide plate and impacts the impeller, it drives the impeller to rotate, which in turn drives the shaft to rotate and the blades to rotate. The end of the blade away from the shaft abuts against the inner wall of the filter element, thereby scraping out the dirt on the inner wall of the filter element, reducing the possibility of dirt clogging the filter element pores, and improving the filtration efficiency of the pre-filter.

[0018] Preferably, the blades are arranged in a spiral shape.

[0019] By adopting the above technical solution, the blades are spiral-shaped, which allows the blades to thoroughly clean all areas of the filter element's inner wall, reducing the possibility of local clogging and improving the cleaning efficiency of the cleaning components.

[0020] Preferably, an abutment block is connected to the outer periphery of the rotating shaft; a protrusion is connected to the inner wall of the upper embedded ring; the end of the protrusion near the rotating shaft is provided with a rounded corner; the rounded corner is used for the abutment block to abut against the end away from the rotating shaft.

[0021] By adopting the above technical solution, a protrusion is connected to the inner side of the upper ring. The rotation of the shaft drives the abutment block to rotate. When the abutment block abuts the protrusion, it causes the filter element to vibrate, causing the dirt stuck to the inside of the filter element to detach from the filter element.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. When the filter element needs to be cleaned, open the drain ball valve to connect the drain port to the outside. Water flows into the inlet chamber from the inlet and then flows to the inside of the filter element to flush away the dirt adhering to the inside of the filter element, causing it to detach from the filter element and be discharged from the drain port, thus cleaning the filter element and improving cleaning efficiency. 2. When the water in the inlet pipe flows along the guide plate and impacts the impeller, it drives the impeller to rotate, which in turn drives the shaft to rotate and the blades to rotate. The end of the blade away from the shaft abuts against the inner wall of the filter element, thereby scraping out the dirt on the inner wall of the filter element, reducing the possibility of dirt clogging the filter element pores, and improving the filtration efficiency of the pre-filter. 3. The inner side of the upper ring is connected to a protrusion. When the shaft rotates, it drives the abutment block to rotate. When the abutment block abuts the protrusion, it causes the filter element to vibrate, causing the dirt stuck to the inside of the filter element to detach from the filter element. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the pre-filter.

[0024] Figure 2 This is a schematic diagram of the pre-filter.

[0025] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 4 This is a partial structural diagram of the filtering and cleaning components.

[0027] Figure 5 yes Figure 1 Enlarged view of point B in the middle.

[0028] Explanation of reference numerals in the attached figures: 1. Valve head; 11. Receiving cavity; 111. Inlet cavity; 112. Outlet cavity; 12. Retaining ring; 121. Upper groove; 122. Abutment groove; 123. Abutment ring; 124. Rotating seat; 1241. Water inlet; 13. Inlet; 14. Outlet; 15. Guide plate; 16. Connecting channel; 17. Inlet pipe; 18. Outlet pipe; 19. Through hole; 10. Boss; 110. Guide hole; 2. Filter bottle; 21. Filter chamber; 22. Drain outlet; 23. Limiting groove; 24. Lower recess; 25. Mounting groove; 3. Filter assembly; 31. Filter element; 32. Upper insert ring; 321. Protrusion; 3211. Rounded corner; 322. Abutment block; 33. Lower insert ring; 34. Stainless steel filter screen; 35. Buckle; 351. Abutment part; 352. Connecting part; 353. Snap-fit ​​part; 3531. Chamfer; 4. Drain ball valve; 41. Connecting pipe; 42. Connecting ring; 5. Pressure gauge; 6. Cleaning components; 61. Shaft; 62. Blades; 63. Impeller; 64. Abutment block. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1This application discloses a pre-filter including a valve head 1. A receiving cavity 11 is provided at the lower end of the valve head 1. A retaining ring 12 is fixedly connected to the upper wall of the receiving cavity 11, and the axis of the retaining ring 12 coincides with the axis of the receiving cavity 11. The retaining ring 12 divides the receiving cavity 11 into an inlet cavity 111 and an outlet cavity 112, with the inlet cavity 111 located inside the retaining ring 12. An inlet 13 is provided along the cavity wall of the receiving cavity 11 in a direction perpendicular to the axis of the receiving cavity 11. A connecting channel 16 is fixedly connected to the cavity wall of the receiving cavity 11, connecting the inlet 13 and the inlet cavity 111. Reference Figure 1 and Figure 2 A pre-filter also includes a pressure gauge 5. An inlet pipe 17 is fixedly connected to the outside of the valve head 1, and the inlet pipe 17 is connected to the inlet 13 for connection to an external pipeline. In this embodiment, the inlet pipe 17 has a hexagonal cross-section. An outlet 14 is provided on the side wall of the receiving cavity 11 away from the inlet 13, and the outlet 14 is connected to the outlet cavity 112. An outlet pipe 18 is fixedly connected to the side of the valve head 1 away from the inlet pipe 17, and the outlet pipe 18 is connected to the outlet 14 for connection to an external pipeline. In this embodiment, the outlet pipe 18 has a hexagonal cross-section. A through hole 19 is provided on the upper wall of the receiving cavity 11, connecting the inlet cavity 111 to the outside. A boss 10 is fixedly connected to the upper end of the valve head 1, and the axis of the boss 10 coincides with the axis of the through hole 19. The lower end of the pressure gauge 5 is threaded to the boss 10. The lower end of the pressure gauge 5 passes through the through hole 19 and extends into the water inlet chamber 111. The pressure gauge 5 is used to detect the pressure in the water inlet chamber 111.

[0031] Reference Figure 1 and Figure 3 A pre-filter also includes a filter bottle 2 and a drain ball valve 4. The upper end of the filter bottle 2 is connected to the lower end of the valve head 1 and covers the opening of the receiving cavity 11. A filter chamber 21 is provided at the upper end of the filter bottle 2, and the filter chamber 21 communicates with the receiving cavity 11. A limiting groove 23 is provided on the cavity wall of the filter chamber 21 near the valve head 1, and the lower end of the valve head 1 is threaded into the limiting groove 23. A drain port 22 is provided at the bottom of the filter chamber 21, and the drain port 22 communicates with the outside. An installation groove 25 is provided on the inner wall of the end of the drain port 22 away from the valve head 1, and one end of the drain ball valve 4 is threaded into the installation groove 25, communicating with the drain port 22. A connecting pipe 41 is fixedly connected to the end of the drain ball valve 4 away from the filter bottle 2, and the connecting pipe 41 communicates with the drain ball valve 4. A connecting ring 42 is coaxially fixedly connected to the outer circumference of the connecting pipe 41, and the connecting ring 42 is used for quick coupling connection.

[0032] A pre-filter also includes a filter assembly 3. The filter assembly 3 includes a filter element 31. One end of the filter element 31 near the valve head 1 is embedded in the water inlet chamber 111, the axis of the filter element 31 coincides with the axis of the retaining ring 12, the other end of the filter element 31 abuts against the bottom of the filter chamber 21, and the drain port 22 is connected to the inside of the filter element 31.

[0033] Reference Figure 3 and Figure 4 The filter assembly 3 also includes an upper insert ring 32 and a snap fastener 35. The upper insert ring 32 is coaxially fixedly connected to the end of the filter element 31 near the valve head 1. The inner wall of the retaining ring 12 near the filter bottle 2 is provided with an upper insert groove 121, in which the upper insert ring 32 is inserted. The groove wall of the upper insert groove 121 near the filter bottle 2 is provided with an abutment groove 122, which extends along the axial direction of the retaining ring 12. An abutment block 322 is fixedly connected to the outer wall of the upper insert ring 32, in which the abutment block 322 is inserted. In this embodiment, the end of the upper insert ring 32 away from the filter element 31 abuts against the bottom of the upper insert groove 121, the outer wall of the upper insert ring 32 is in contact with the groove wall of the upper insert groove 121, and the side wall of the abutment block 322 is in contact with the groove wall of the abutment groove 122. An abutment ring 123 is fixedly connected to the outer periphery of the retaining ring 12. A plurality of snap fasteners 35 are fixedly connected to the outer periphery of the upper ring 32, and the snap fasteners 35 are evenly distributed circumferentially around the axis of the upper ring 32. In this embodiment, there are three snap fasteners 35. Each snap fastener 35 includes an abutment portion 351, a connecting portion 352, and a locking portion 353. One end of the abutment portion 351 is fixedly connected to the outer wall of the upper ring 32, and the length direction of the abutment portion 351 is perpendicular to the axis of the filter element 31. The end of the connecting portion 352 away from the filter bottle 2 is fixedly connected to the other end of the abutment portion 351, and the connecting portion 352 is located outside the baffle. One end of the locking portion 353 is fixedly connected to the other end of the connecting portion 352 near the retaining ring 12. The lower end of the snap-fit ​​part 353 abuts against the side surface of the abutment ring 123 away from the filter bottle 2. The snap-fit ​​part 353 is provided with a chamfer 3531 on the side away from the abutment part 351. The chamfer 3531 is located at the end of the snap-fit ​​part 353 away from the connecting part 352. The chamfer 3531 is used to abut against the side surface of the abutment ring 123 near the filter bottle 2.

[0034] Reference Figure 4 and Figure 5 The filter assembly 3 also includes a lower insert ring 33 and a stainless steel filter screen 34. The lower insert ring 33 is coaxially and fixedly connected to the end of the filter element 31 away from the upper insert ring 32. The bottom of the filter chamber 21 is provided with a lower insert groove 24, and the lower insert ring 33 is embedded in the lower insert groove 24. In this embodiment, the end of the lower insert ring 33 away from the filter element 31 abuts against the bottom of the lower insert groove 24, and the outer wall of the lower insert ring 33 is in contact with the wall of the lower insert groove 24. The stainless steel filter screen 34 is coaxially sleeved on the outer periphery of the filter element 31, and the two ends of the stainless steel filter screen 34 are fixedly connected to the upper insert ring 32 and the lower insert ring 33, respectively.

[0035] Reference Figure 1 and Figure 3A pre-filter also includes a cleaning assembly 6. The cleaning assembly 6 includes a rotating shaft 61 and an impeller 63. A rotating seat 124 is fixedly connected to the inner wall of the retaining ring 12. The rotating seat 124 is located between the connection point of the connecting channel 16 and the water inlet chamber 111 and the upper embedded ring 32. The rotating seat 124 has several water inlets 1241 near the inner wall of the retaining ring 12, and these water inlets 1241 are evenly distributed circumferentially around the axis of the retaining ring 12. In this embodiment, there are three water inlets 1241. The rotating shaft 61 is coaxially embedded in the filter element 31. The end of the rotating shaft 61 near the valve head 1 passes through the rotating seat 124. The impeller 63 is coaxially fixedly connected to the end of the rotating shaft 61 that extends into the water inlet chamber 111. A guide plate 15 is fixedly connected to the upper wall of the water inlet chamber 111. One end of the guide plate 15 along the length direction is fixedly connected to the wall of the water inlet chamber 111. A guide hole 110 is provided between the other end of the guide plate 15 along the length direction and the wall of the water inlet chamber 111. The guide hole 110 faces the blade 62 of the impeller 63. The two ends of the guide plate 15 are located on both sides of the rotation axis of the impeller 63.

[0036] Reference Figure 3 and Figure 4 The cleaning component 6 also includes blades 62 and abutment blocks 64. Blades 62 are connected to the outer periphery of the rotating shaft 61, with the end of blade 62 away from the rotating shaft 61 abutting against the inner wall of the filter element 31. In this embodiment, the blades 62 are spiral-shaped. An abutment block 64 is fixedly connected to the outer periphery of the rotating shaft 61 near the valve head 1. Several protrusions 321 are fixedly connected to the inner wall of the upper ring 32, and these protrusions 321 are evenly distributed circumferentially around the axis of the upper ring 32. In this embodiment, there are six protrusions 321. The end of each protrusion 321 away from the upper ring 32 has a rounded corner 3211, which is used for the abutment block 64 to abut against the end away from the rotating shaft 61.

[0037] The implementation principle of a pre-filter in this application embodiment is as follows: water flows in from the inlet pipe 17, enters the inlet chamber 111 through the inlet port 13 and the connecting channel 16, enters the inner side of the filter element 31, flows through the filter holes of the filter element 31 to the outer side of the filter element 31, enters the outlet chamber 112, enters the outlet pipe 18 through the outlet port 14, and then flows out of the pre-filter.

[0038] When the filter element 31 needs to be cleaned, open the drain ball valve 4. The water flowing into the inlet chamber 111 impacts the blades 62 of the impeller 63 along the guide plate 15, driving the impeller 63 to rotate, which in turn drives the shaft 61 to rotate, causing the blades 62 to rotate. This causes the blades 62 to scrape away the dirt inside the filter element 31. When the abutting block 64 abuts against the rounded corner 3211, the upper embedded ring 32 vibrates, causing the filter element 31 to vibrate. This causes the dirt inside the filter element 31 to detach from the filter element 31. The dirt causes the blades 62 to fall into the drain port 22. The water flow washes the inside of the filter element 31 and the blades 62, causing the dirt to be discharged from the drain port 22 and the drain ball valve 4.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pre-filter, characterized in that: Includes a valve head (1), a filter bottle (2), a filter element (31), and a drain ball valve (4); the lower end of the valve head (1) is provided with a receiving cavity (11); a retaining ring (12) is connected to the upper wall of the receiving cavity (11); the retaining ring (12) divides the receiving cavity (11) into an inlet cavity (111) and an outlet cavity (112); the inlet cavity (111) is located inside the retaining ring (12); the valve head (1) is provided with an inlet (13); the inlet (13) is connected to the inlet cavity (111); the valve head (1) is provided with an outlet (14); the outlet (14) is connected to the outlet cavity (112); the filter bottle (2) is provided with a drain ball valve (4); the lower end of the valve head (1) is provided with a receiving cavity (11); the upper wall of the receiving cavity (111) is connected with a retaining ring (12); the upper wall of the receiving cavity (111) is connected with a retaining ring (12); the filter bottle (2) is provided with a drain ball valve (4); the lower end of the valve head (1) is provided with a receiving cavity (111); the upper wall of the receiving cavity (111) is connected with a retaining ring (12 ... lower end of the receiving cavity (111) is provided with a retaining ring (12); the upper wall of the receiving cavity (111) is connected with a retaining ring (12); the lower end of the valve head (1) is provided with a receiving cavity (1 The filter bottle (2) is connected to the valve head (1) and covers the cavity opening of the receiving cavity (11); the filter bottle (2) is provided with a filter cavity (21); the filter cavity (21) is connected to the receiving cavity (11); one end of the filter element (31) is embedded in the water inlet cavity (111); the water inlet cavity (111) is connected to the inner side of the filter element (31); the other end of the filter element (31) abuts against the bottom of the filter cavity (21); the bottom of the filter cavity (21) is provided with a drain port (22); the drain port (22) connects the inner side of the filter element (31) to the outside; the drain ball valve (4) is connected to the filter bottle (2); the drain ball valve (4) is connected to the drain port (22).

2. The pre-filter according to claim 1, characterized in that: The drain ball valve (4) is connected to a connecting pipe (41) at the end away from the filter bottle (2); the connecting pipe (41) is connected to the drain ball valve (4); a connecting ring (42) is coaxially connected to the outer periphery of the connecting pipe (41); the connecting ring (42) is used for quick coupling connection.

3. The pre-filter according to claim 1, characterized in that: It also includes a pressure gauge (5); the pressure gauge (5) is connected to the valve head (1); the pressure gauge (5) is used to detect the pressure in the water inlet chamber (111).

4. The pre-filter according to claim 1, characterized in that: The filter chamber (21) has a limiting groove (23) on the side of the chamber wall near the valve head (1); the valve head (1) is threaded into the limiting groove (23).

5. The pre-filter according to claim 1, characterized in that: The retaining ring (12) has an upper groove (121) on the inner wall near the filter bottle (2); the bottom of the filter chamber (21) has a lower groove (24); the filter element (31) is connected to an upper ring (32) at one end near the valve head (1); the upper ring (32) is located in the upper groove (121); the other end of the filter element (31) is connected to a lower ring (33); the lower ring (33) is embedded in the lower groove (24).

6. The pre-filter according to claim 5, characterized in that: It also includes a stainless steel filter screen (34); the stainless steel filter screen (34) is sleeved on the outer periphery of the filter element (31); the two ends of the stainless steel filter screen (34) are respectively connected to the upper embedded ring (32) and the lower embedded ring (33).

7. The pre-filter according to claim 5, characterized in that: It also includes a cleaning assembly (6); the cleaning assembly (6) includes a rotating shaft (61), blades (62) and an impeller (63); the rotating shaft (61) is rotatably connected to the valve head (1); the rotation axis of the rotating shaft (61) coincides with the axis of the filter element (31); the impeller (63) is coaxially connected to one end of the rotating shaft (61) near the valve head (1); the impeller (63) is embedded in the water inlet chamber (111); a guide plate (15) is connected to the upper wall of the water inlet chamber (111); one end of the guide plate (15) along the length direction of the guide plate (15) is fixedly connected to the wall of the water inlet chamber (111); the two ends of the guide plate (15) are located on both sides of the rotation axis of the impeller (63); the blades (62) are connected to the outer periphery of the rotating shaft (61); the end of the blades (62) away from the rotating shaft (61) is in contact with the inner wall of the filter element (31).

8. The pre-filter according to claim 7, characterized in that: The blades (62) are arranged in a spiral shape.

9. The pre-filter according to claim 7, characterized in that: The outer periphery of the rotating shaft (61) is connected to an abutment block (64); the inner wall of the upper embedded ring (32) is connected to a protrusion (321); the end of the protrusion (321) near the rotating shaft (61) is provided with a rounded corner (3211); the rounded corner (3211) is used for the abutment block (64) to abut against the end away from the rotating shaft (61).

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