Backflushing type filtering device of heat exchange unit

Abstract

The invention discloses a backflushing type filtering device of a heat exchange unit, and belongs to the technical field of filtering devices, the backflushing type filtering device comprises a shell, a water outlet pipe and a water inlet pipe, the water outlet pipe and the water inlet pipe are connected to the shell, a plurality of filter element mounting ports are formed in the top wall of the shell, a partition plate is arranged in the shell, and a plurality of mounting rings are arranged on the partition plate; a filter element is arranged between the filter element mounting opening and the mounting ring, and a pollution discharge mechanism is further arranged on the partition plate; first fixing rods are symmetrically arranged on the inner wall of the mounting ring, the two first fixing rods are located in the filter element, a second fixing rod is fixed between the two first fixing rods, a rotating shaft is rotatably mounted on the second fixing rod, and a plurality of beating rods are mounted on the rotating shaft; while filtering, the filter element can be backwashed without shutdown, and the cleaning effect on the filter element is improved and the service life of the filter element is ensured by utilizing flowing of a medium and matching with the beating rod.

Description

Technical Field

[0004] The invention relates to the technical field of filtering devices, and in particular to a backwash filtering device for a heat exchange unit. Background Art

[0005] The filter is a component of the heat exchanger unit. In order to avoid the internal structure and blockage caused by long-term use of the heat exchanger unit, it is necessary to filter the water. The backwash filter is widely used in various fields due to its advantages such as stable water quality, simple operation, convenient maintenance and long service life.

[0006] The current backwash filter uses the difference in internal and external pressure difference to change the flow direction of the medium during backwashing, so that the medium flows from the outside of the filter element to the inside to play a backwashing role and discharge impurities. However, after long-term use, it was found that it is difficult to completely remove impurities from the inside of the filter element by simply flushing the medium, resulting in incomplete cleaning and shortening the service life of the filter element. Summary of the invention

[0007] The purpose of the present invention is to provide a backwash filter device for a heat exchange unit to solve the following technical problem: it is difficult for the existing backwash filter to completely flush the impurities attached to the filter element only by water pressure.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A backwash filter device for a heat exchange unit comprises a housing and a water outlet pipe and a water inlet pipe connected to the housing, a plurality of filter element installation openings are arranged on the top wall of the housing, a partition is arranged inside the housing, a plurality of installation rings are arranged on the partition, a filter element is arranged between the filter element installation opening and the installation ring, and a sewage discharge mechanism is also arranged on the partition;

[0010] A first fixing rod is symmetrically arranged on the inner wall of the mounting ring, and two of the first fixing rods are located inside the filter element, a second fixing rod is fixed between the two first fixing rods, a rotating shaft is rotatably mounted on the second fixing rod, a plurality of knocking rods are mounted on the rotating shaft, and a reversible paddle is arranged at the bottom end of the rotating shaft.

[0011] As a further solution of the present invention: the knocking rod includes a sleeve, one end of the sleeve is fixed on the rotating shaft, and the other end is movably provided with a push rod, one end of the push rod is fixed with a hemispherical knocking block, and the other end is connected to a spring, one end of the spring is connected to the inner wall of the sleeve.

[0012] As a further solution of the present invention: a plurality of fixed blocks are fixed to the bottom end of the rotating shaft along the circumferential direction, a rotating block is rotatably mounted on the fixed block, and one end of the rotating block is fixedly connected to the blade, and a limiting block is also fixed on the fixed block, and the limiting block is located above the rotating block.

[0013] As a further solution of the present invention: an annular groove is formed on the inner wall of the mounting ring along the circumferential direction, a sliding block is provided at one end of the first fixing rod close to the annular groove, and the sliding block is slidably connected to the annular groove.

[0014] As a further solution of the present invention: the width of the annular groove is greater than the height of the slider, a positioning pin is fixed to the bottom of the slider, and positioning grooves are evenly opened at the bottom of the annular groove along the circumferential direction, and the positioning grooves match the size of the positioning pins.

[0015] As a further solution of the present invention: the sewage discharge mechanism includes a sewage discharge pipe fixed on the upper surface of the partition, one end of the sewage discharge pipe extends to the outside of the shell, and a sewage discharge valve is installed on the sewage discharge pipe, a return pipe is provided at the bottom of the partition, one end of the return pipe is rotatably sealed and connected to the sewage discharge pipe, and the other end is connected to a guide cover, a drive shaft is rotatably installed at the bottom of the shell, one end of the drive shaft is fixedly connected to the return pipe, and the other end is connected to an external drive source.

[0016] As a further solution of the present invention: the air guide cover is a truncated cone structure that is larger at the top and smaller at the bottom, and the diameter of the top of the air guide cover is larger than the diameter of the filter element.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention provides a mounting ring, a first fixing rod, a second fixing rod, a rotating shaft and a paddle. During backwashing, the medium flow direction changes, and the medium flows from the outside of the filter element to the inside of the filter element, flushing the impurities inside the filter element. At the same time, the flow of the medium drives the paddle and the rotating shaft to rotate, and the knocking rod is used to knock the inside of the filter element to knock off the impurities, thereby ensuring the flushing effect.

[0019] (2) The present invention provides structures such as an annular groove, a slider, a positioning pin and a positioning groove. During normal filtration, the medium pushes the first fixing rod and the slider upward for a certain distance. Under the action of the medium flow, the position of the first fixing rod changes. During backwashing, the positioning pin is inserted into the positioning groove to fix the position of the first fixing rod again. During each backwashing, the position where the knocking rod knocks changes, thereby improving the cleaning effect of the filter element.

[0020] (3) The present invention sets a sewage discharge mechanism. When backwashing is required, the drive shaft is used to drive the return pipe to rotate, so that the guide cover is connected to the corresponding filter element, and the sewage valve on the sewage pipe is opened. At this time, a pressure difference is generated between the medium in the filter element and the outside of the sewage pipe, so that the flow direction of the medium is changed, thereby discharging impurities, and other filter elements continue to work normally without stopping, thereby ensuring work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the mounting ring and the filter element of the present invention;

[0025] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 It is a structural schematic diagram of the beating rod of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the fixing block and the blade of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting ring of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the positioning pin and the positioning groove of the present invention.

[0030] In the figure: 1. shell; 2. water outlet pipe; 3. water inlet pipe; 4. filter element installation port; 5. partition; 6. installation ring; 601. first fixing rod; 602. second fixing rod; 603. rotating shaft; 604. knocking rod; 605. paddle; 606. sleeve; 607. spring; 608. push rod; 609. knocking block; 610. fixed block; 611. rotating block; 612. limiting block; 613. slider; 614. positioning pin; 615. annular groove; 616. positioning groove; 7. filter element; 8. drain pipe; 9. return pipe; 10. deflector; 11. drive shaft. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-4As shown, the present invention is a backwash filter device for a heat exchange unit, comprising a shell 1 and a water outlet pipe 2 and a water inlet pipe 3 connected to the shell 1, a plurality of filter element mounting ports 4 are arranged on the top wall of the shell 1, a partition plate 5 is arranged inside the shell 1, a plurality of mounting rings 6 are arranged on the partition plate 5, a filter element 7 is arranged between the filter element mounting port 4 and the mounting ring 6, and a sewage discharge mechanism is also arranged on the partition plate 5; first fixing rods 601 are symmetrically arranged on the inner wall of the mounting ring 6, and two first fixing rods 601 are located inside the filter element 7, a second fixing rod 602 is fixed between the two first fixing rods 601, a rotating shaft 603 is rotatably installed on the second fixing rod 602, and a plurality of knocking rods are installed on the rotating shaft 603 604, a reversible paddle 605 is provided at the bottom end of the rotating shaft 603; the equipment is installed, and when working, the medium enters the shell 1 through the water inlet pipe 3, flows into each filter element 7 through the partition 5 for filtration, and the filtered medium is discharged through the water outlet pipe 2. When backwashing is required, the sewage discharge mechanism is adjusted first, and the other filter elements 7 work normally. Backwash one filter element 7 using differential pressure. While flushing, the flow of the medium drives the paddle 605 and the rotating shaft 603 to rotate, so that the knocking rod 604 rotates with the rotating shaft 603, and the knocking rod 604 cooperates with the first fixed rod 601 to knock the inner side of the filter element 7 to shake off impurities, thereby improving the cleaning effect of the filter element 7.

[0033] See also Figure 4 and Figure 5 The knocking rod 604 includes a sleeve 606, one end of which is fixed on the rotating shaft 603, and a push rod 608 is movably provided on the other end. A hemispherical knocking block 609 is fixed on one end of the push rod 608, and a spring 607 is connected to the other end. One end of the spring 607 is connected to the inner wall of the sleeve 606; when the rotating shaft 603 rotates, the multiple knocking rods 604 are driven to rotate. When the knocking block 609 of the knocking rod 604 passes the first fixed rod 601, the knocking block 609 and the push rod 608 move toward one side of the sleeve 606, and the spring 607 is squeezed. When the knocking block 609 passes the first fixed rod 601, the spring 607 is released, so that the knocking block 609 knocks the inner wall of the filter element 7 to generate vibration, which is conducive to the falling of impurities.

[0034] See also Figure 4 and Figure 6A plurality of fixed blocks 610 are fixed to the bottom end of the rotating shaft 603 along the circumferential direction, a rotating block 611 is rotatably mounted on the fixed block 610, and one end of the rotating block 611 is fixedly connected to the paddle 605, and a limit block 612 is also fixed on the fixed block 610, and the limit block 612 is located above the rotating block 611; the paddle 605 can be flipped, and during normal filtering, driven by the medium, the paddle 605 rotates upward toward the rotating shaft 603, at this time the rotating shaft 603 will not rotate, and the paddle 605 will not affect the impurities from entering the filter element 7, and when backwashing is performed, the paddle 605 works normally to drive the rotating shaft 603 to rotate.

[0035] See also Figure 7 and Figure 8 , an annular groove 615 is provided on the inner wall of the mounting ring 6 along the circumferential direction, a slider 613 is provided at one end of the first fixing rod 601 close to the annular groove 615, and the slider 613 is slidably connected to the annular groove 615; the width of the annular groove 615 is greater than the height of the slider 613, a positioning pin 614 is fixed to the bottom of the slider 613, and positioning grooves 616 are uniformly provided at the bottom of the annular groove 615 along the circumferential direction, and the positioning grooves 616 match the size of the positioning pin 614; in order to further improve the cleaning effect of the filter element 7, when the filter element 7 is not backwashed, under the action of the medium flow, the medium will push the first fixing rod 601 and the slider 613 to move upward for a distance, so that the position of the first fixing rod 601 changes, and when backwashing, the positioning pin 614 is inserted into the positioning groove 616, and the position of the first fixing rod 601 is fixed again, so that each time backwashing, the position of the knocking rod 604 is changed, thereby improving the cleaning effect of the filter element 7.

[0036] See also Figure 2 The sewage discharge mechanism includes a sewage discharge pipe 8 fixed on the upper surface of the partition 5, one end of the sewage discharge pipe 8 extends to the outside of the shell 1, and a sewage discharge valve is installed on the sewage discharge pipe 8. A return pipe 9 is arranged at the bottom of the partition 5. One end of the return pipe 9 is rotatably sealed and connected to the sewage discharge pipe 8, and the other end is connected to a guide cover 10. A driving shaft 11 is rotatably installed at the bottom of the shell 1, one end of the driving shaft 11 is fixedly connected to the return pipe 9, and the other end is connected to an external driving source. The guide cover 10 is a truncated cone structure with a larger upper part and a smaller lower part, and the diameter of the top of the guide cover 10 is larger than the diameter of the filter element 7; when backwashing is required, the driving shaft 11 is used to drive the return pipe 9 to rotate, so that the guide cover 10 is connected to the corresponding filter element 7, and the sewage discharge valve on the sewage discharge pipe 8 is opened. At this time, a pressure difference is generated between the medium in the filter element 7 and the outside of the sewage discharge pipe 8, so that the flow direction of the medium is changed, thereby discharging impurities, and other filter elements 7 still work normally without stopping, thereby ensuring work efficiency.

[0037] The working principle of the present invention is as follows: the equipment is installed. When working, the medium enters the housing 1 through the water inlet pipe 3, flows into each filter element 7 through the partition plate 5 for filtration, and the filtered medium is discharged through the water outlet pipe 2. When backwashing is required, the external driving source (not shown) drives the driving shaft 11 to rotate a certain angle, and the driving shaft 11 is used to drive the return pipe 9 to rotate, so that the guide cover 10 is connected with the corresponding filter element 7, and the sewage valve on the sewage pipe 8 is opened. At this time, the medium in the filter element 7 and the outside of the sewage pipe 8 produce a pressure difference, so that the flow direction of the medium is changed, and other filter elements 7 still work normally. While flushing, the flow of the medium drives the paddle 605 and the rotating shaft 603 to rotate, so that the knocking rod 604 rotates with the rotating shaft 603, and the knocking rod 604 cooperates with the first fixed rod 601 to knock the inner side of the filter element 7 to shake off the impurities, and then the sewage is discharged through the sewage pipe 8;

[0038] When the filter element 7 is not backwashed, under the action of the medium flow, the medium will push the first fixing rod 601 and the slider 613 upward for a distance, and the positioning pin 614 will disengage from the positioning groove 616. Under the action of the medium vibration, the position of the first fixing rod 601 will change randomly. When backwashing is performed, the first fixing rod 601 will descend, and the positioning pin 614 will be inserted into the positioning groove 616 to fix the position of the first fixing rod 601 again. At this time, the position of the first fixing rod 601 in the filter element 7 is different from before. When backwashing is performed again, the position where the knocking rod 604 knocks will also change, thereby improving the cleaning effect of the filter element 7.

[0039] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A backwash filter device for a heat exchange unit, comprising a housing (1) and a water outlet pipe (2) and a water inlet pipe (3) connected to the housing (1), characterized in that: A plurality of filter element installation openings (4) are arranged on the top wall of the housing (1); a partition plate (5) is arranged inside the housing (1); a plurality of installation rings (6) are arranged on the partition plate (5); a filter element (7) is arranged between the filter element installation opening (4) and the installation ring (6); and a sewage discharge mechanism is also arranged on the partition plate (5); A first fixing rod (601) is symmetrically arranged on the inner wall of the mounting ring (6), and two of the first fixing rods (601) are located inside the filter element (7). A second fixing rod (602) is fixed between the two first fixing rods (601), and a rotating shaft (603) is rotatably mounted on the second fixing rod (602). A plurality of knocking rods (604) are mounted on the rotating shaft (603), and a reversible paddle (605) is arranged at the bottom end of the rotating shaft (603).

2. A heat exchange unit backwash filter device according to claim 1, characterized in that: The knocking rod (604) comprises a sleeve (606), one end of which is fixed on the rotating shaft (603), and the other end of which is movably provided with a push rod (608), one end of which is fixed with a hemispherical knocking block (609), and the other end of which is connected with a spring (607), and one end of which is connected to the inner wall of the sleeve (606).

3. A backwash filter device for a heat exchange unit according to claim 1, characterized in that: A plurality of fixed blocks (610) are fixed to the bottom end of the rotating shaft (603) along the circumferential direction, a rotating block (611) is rotatably mounted on the fixed block (610), and one end of the rotating block (611) is fixedly connected to the blade (605), and a limiting block (612) is also fixed on the fixed block (610), and the limiting block (612) is located above the rotating block (611).

4. A backwash filter device for a heat exchange unit according to claim 1, characterized in that: An annular groove (615) is provided on the inner wall of the mounting ring (6) along the circumferential direction, and a sliding block (613) is provided at one end of the first fixing rod (601) close to the annular groove (615), and the sliding block (613) is slidably connected to the annular groove (615).

5. A backwash filter device for a heat exchange unit according to claim 4, characterized in that: The width of the annular groove (615) is greater than the height of the slider (613), a positioning pin (614) is fixed at the bottom of the slider (613), and positioning grooves (616) are evenly opened at the bottom of the annular groove (615) along the circumferential direction, and the positioning grooves (616) match the size of the positioning pin (614).

6. A backwash filter device for a heat exchange unit according to claim 1, characterized in that: The sewage discharge mechanism comprises a sewage discharge pipe (8) fixed on the upper surface of the partition (5), one end of the sewage discharge pipe (8) extends to the outside of the shell (1), and a sewage discharge valve is installed on the sewage discharge pipe (8), a return pipe (9) is arranged at the bottom of the partition (5), one end of the return pipe (9) is rotatably sealed and connected to the sewage discharge pipe (8), and the other end is connected to a guide cover (10), and a drive shaft (11) is rotatably installed at the bottom of the shell (1), one end of the drive shaft (11) is fixedly connected to the return pipe (9), and the other end is connected to an external drive source.

7. A backwash filter device for a heat exchange unit according to claim 6, characterized in that: The air guide cover (10) is a truncated cone-shaped structure that is larger at the top and smaller at the bottom, and the diameter of the top of the air guide cover (10) is larger than the diameter of the filter element (7).

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