A self-cleaning protective filter device

Abstract

The application relates to the technical field of filters, and discloses a self-cleaning protection filter device which comprises a filter body, a filter core and a driving piece. A filtering cavity and a liquid discharge cavity are arranged in the filter body. The filter core is vertically arranged in the filtering cavity and is driven to rotate by the driving piece. A liquid inlet pipe and a liquid outlet pipe are connected to one side of the filter body. The liquid inlet pipe is communicated with the filtering cavity, and the liquid outlet pipe is communicated with the liquid discharge cavity. A cover plate is detachably arranged on the other side of the filter body. The filter core is driven to rotate, and a movable dirt-guiding scraping assembly is used to scrape off impurities on line. The pressure difference formed by opening the dirt discharge piece is used to automatically discharge the impurities into a dirt collecting chamber together with the liquid. The reciprocating movement of the dirt-guiding cover generates a plug effect, assists in stripping stubborn impurities and improves the dirt discharge kinetic energy. Meanwhile, passive self-cleaning and timing active self-cleaning modes based on pressure difference monitoring are supported, and the whole process does not need to stop, so that the cleaning efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and in particular to a self-cleaning protective filter device. Background Technology

[0002] In fluid handling technology, filters, as core equipment to ensure stable system operation, are widely used in many industrial scenarios such as petrochemicals, power energy, and water treatment. With the continuous improvement of modern industry's requirements for fluid quality, solid particles, colloidal impurities, microorganisms, and other pollutants inevitably mix into the fluid system. If these impurities are not removed in time and effectively, they will lead to problems such as accelerated wear of subsequent precision equipment and pipeline blockage. Therefore, filter devices are needed. As a purification unit in the fluid system, the filter plays the role of intercepting and removing solid particulate pollutants, colloidal impurities, and even liquid foreign matter from the fluid, thereby effectively preventing problems such as abrasive wear, valve core jamming, and throttling orifice blockage. In practical engineering applications, the performance of the filter directly determines the service life of pumps, valves, and actuators.

[0003] As the filter is used for a longer period of time, a large amount of impurities will gradually accumulate inside the filter element, which will lead to a significant decrease in filtration efficiency. However, currently, when cleaning the filter element, it is usually necessary to first remove the top cover of the filter in order to access the internal filter element and carry out cleaning work. The whole process is time-consuming and laborious, and inconvenient for daily maintenance.

[0004] To address the aforementioned problems, this application proposes a self-cleaning protective filter device. Summary of the Invention

[0005] This invention proposes a self-cleaning protective filter device, which solves the problem in related technologies that the filter element accumulates impurities after long-term use, resulting in a decrease in filtration effect. Cleaning requires removing the top cover to access the filter element, which is cumbersome, time-consuming, and inconvenient for daily maintenance.

[0006] The present invention proposes a self-cleaning protective filter device, comprising a filter body, a filter element, and a driving component;

[0007] The filter body has a filtration chamber and a drain chamber. The filter element is vertically installed in the filtration chamber and rotated by a driving component. One side of the filter body is connected to an inlet pipe and an outlet pipe. The inlet pipe is connected to the filtration chamber and the outlet pipe is connected to the drain chamber.

[0008] A cover plate is detachably installed on the other side of the filter body. A dirt-guiding and scraping assembly is installed on the cover plate, which is placed inside the filter chamber and located on one side of the filter element. The dirt-guiding and scraping assembly can move closer to or away from the filter element. A dirt collection chamber is formed between the dirt-guiding and scraping assembly and the cover plate. A drain component communicating with the dirt collection chamber is connected to the outside of the cover plate.

[0009] As a further optimization of the present invention, the dirt guiding and scraping assembly includes a dirt guiding cover, a cylinder and an elastic dirt scraping component. A cylinder is installed on the outer side of the cover plate, and the driving end of the cylinder is connected to a dirt guiding cover placed in the filter chamber and located on one side of the filter element. A dirt collection chamber is formed between the cover plate and the dirt guiding cover. Multiple sets of vertically spaced dirt guiding ports are opened on the dirt guiding cover, and an elastic dirt scraping component is installed on the side of the dirt guiding cover near the filter element.

[0010] As a further optimization of the present invention, the elastic scraping component includes an elastic part and a scraping blade, and the scraping blade located on one side of the filter element is installed on the dirt guide cover through the elastic part.

[0011] As a further optimization of the present invention, the elastic part includes a connecting rod and a spring. A horizontally arranged connecting rod is slidably connected to the dirt guide cover. The dirt scraper is fixed to one end of the connecting rod near the filter element. A spring is sleeved on the connecting rod, and the two ends of the spring are respectively connected to the dirt guide cover and the dirt scraper.

[0012] As a further optimization of the present invention, the driving component includes a motor and a shaft. The motor is mounted on the top of the filter body, and the output end of the motor is connected to the shaft, which is connected to the top of the filter element.

[0013] As a further optimization of the present invention, the sewage discharge component includes a sewage discharge pipe, the outer side of the cover plate is connected to the sewage discharge pipe communicating with the sewage collection chamber, and a control valve is installed on the sewage discharge pipe.

[0014] As a further optimization of the present invention, a first differential pressure switch extending therein is installed on the inlet pipe, a second differential pressure switch extending therein is installed on the outlet pipe, and a pressure sensor extending into the discharge chamber is installed on the filter body.

[0015] As a further optimization of the present invention, two sets of symmetrically arranged screws are fixed on the other side of the filter body, and the cover plate is sleeved on the two sets of screws, with nuts threaded onto the screws to press the cover plate.

[0016] As a further optimization of the present invention, the first differential pressure switch, the second differential pressure switch, the pressure sensor, the motor, the cylinder, and the control valve are all connected to an external control system.

[0017] The above-described technical solution of the present invention has the following beneficial technical effects:

[0018] 1. In use, external liquid enters the filter chamber inside the filter body through the inlet pipe. The liquid flows upward through the filter element and into the drain chamber, and then is discharged through the outlet pipe. When the outer surface of the filter element is clogged with a lot of impurities, the filter element can be rotated by the drive component. The dirt guide scraper assembly moves closer to the filter element and sticks to it. The rotation of the filter element scrapes off the impurities on its outer surface. During this process, the drain part on the outside of the cover is opened. The pressure difference formed between the drain part and the filter body is used as the self-cleaning force. The scraped impurities are driven by the liquid to pass through the dirt guide scraper assembly and enter the dirt collection chamber, and then are discharged through the drain part. The above design drives the filter element to rotate and works with the dirt guide scraper assembly to stick to and scrape off impurities. Online cleaning can be completed without disassembling the filter body. At the same time, the pressure difference formed after the drain part is opened is used as the self-cleaning force, so that the scraped impurities are automatically entered into the dirt collection chamber and discharged with the liquid through the dirt guide scraper assembly. This effectively simplifies the cleaning operation, reduces labor intensity, and improves the efficiency of the filter device.

[0019] 2. When the filter element becomes clogged, during the operation of the dirt-guiding and scraping assembly, the cylinder can drive the dirt-guiding cover closer to the filter element, causing the elastic scraping element to elastically contact the outer periphery of the filter element. As the drive unit rotates the filter element, the elastic scraping element scrapes off the impurities from its outer periphery. Because the discharge device is open, under the pressure difference, the liquid inside the filter body carrying impurities enters the dirt collection chamber through the dirt guide port on the dirt-guiding cover, and then is discharged through the discharge device. In actual use, the cylinder can also drive the dirt-guiding cover to repeatedly approach and move away from the filter element, making the dirt-guiding cover act as a piston within the filter body. The liquid inside the filter body impacts the impurities on the outer periphery of the filter element, making the impurities fall off the outer periphery of the filter element more effectively. It also provides kinetic energy for the liquid carrying impurities to pass through the guide port on the guide cover and enter the collection chamber. The aforementioned guide scraping assembly is driven by a cylinder to move the guide cover, which allows the elastic scraping element to elastically contact the filter element to achieve the scraping effect. It can also generate a piston effect by reciprocating to approach and move away from the filter element, using the liquid impact force to assist in the removal of stubborn impurities. At the same time, it provides additional kinetic energy for the impurities to pass through the guide port with the liquid and enter the collection chamber. The dual effect improves the efficiency of impurity removal and discharge, ensuring the thoroughness of self-cleaning.

[0020] 3. This invention features a first differential pressure switch installed on the inlet pipe and a second differential pressure switch installed on the outlet pipe. These switches monitor the fluid pressure in the inlet and outlet pipes respectively. When a large amount of impurities adhere to the outer circumference of the filter element, the flow rate discharged from the outlet pipe decreases, and the differential pressure monitored by the second differential pressure switch decreases. When the difference reaches a set value, a switch signal is output. Similarly, a pressure sensor monitors the pressure in the discharge chamber within the filter body, serving a comparison function. Then, an external control system controls the operation of the drive components, the guide scraper assembly, and the discharge components, achieving passive self-cleaning of the filter body. In the cleaning mode, the working time of the drive components, the guide scraper assembly, and the discharge components can be set according to the needs of the external control system, and the frequency of operation can be set to achieve active self-cleaning. The above-mentioned active self-cleaning mode can be achieved by real-time monitoring of the pressure of the inlet and outlet liquid and the discharge chamber through the first differential pressure switch, the second differential pressure switch, and the pressure sensor. It can also achieve passive self-cleaning mode triggered by the differential pressure signal. At the same time, it supports the external control system to execute active self-cleaning mode according to the set time cycle. Both modes can be completed online without stopping the machine. It can clean as needed according to the actual blockage situation, and can also perform scheduled maintenance according to the plan, avoiding production interruption caused by cleaning shutdown. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a self-cleaning protective filter device proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the cooperative structure of the cover plate, the sewage guiding and scraping assembly and the sewage discharge component in this invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of A in the middle;

[0024] Figure 4 This is a schematic diagram of the cooperative structure between the dirt guide cover and the elastic dirt scraper in this invention;

[0025] Figure 5 For the present invention Figure 4 A magnified view of B in the middle.

[0026] Reference numerals in the attached drawings: 1. Filter body; 101. Inlet pipe; 102. Outlet pipe; 103. First differential pressure switch; 104. Second differential pressure switch; 105. Pressure sensor; 2. Filter element; 3. Drive component; 31. Motor; 32. Shaft; 4. Cover plate; 41. Screw; 42. Nut; 5. Sludge guide and scraper assembly; 51. Sludge guide cover; 511. Sludge guide port; 52. Cylinder; 53. Elastic scraper; 531. Elastic part; 5311. Connecting rod; 5312. Spring; 532. Sludge scraper blade; 6. Sludge discharge component; 61. Sludge discharge pipe; 62. Control valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0028] like Figure 1-5 As shown, the present invention proposes a self-cleaning protective filter device, which includes a filter body 1, a filter element 2, and a driving component 3;

[0029] The filter body 1 has a filter chamber and a drain chamber. The filter element 2 is vertically installed in the filter chamber and is driven to rotate by the drive component 3. One side of the filter body 1 is connected to the inlet pipe 101 and the outlet pipe 102. The inlet pipe 101 is connected to the filter chamber and the outlet pipe 102 is connected to the drain chamber.

[0030] A cover plate 4 is detachably installed on the other side of the filter body 1. A dirt guiding and scraping assembly 5 is installed on the cover plate 4, which is placed inside the filter chamber and located on one side of the filter element 2. The dirt guiding and scraping assembly 5 can move closer to or away from the filter element 2. A dirt collection chamber is formed between the dirt guiding and scraping assembly 5 and the cover plate 4. A drain component 6 that communicates with the dirt collection chamber is connected to the outside of the cover plate 4.

[0031] External liquid enters the filter chamber inside the filter body 1 through the inlet pipe 101. The liquid passes through the filter layer of the filter element 2, and impurities are trapped on the outer surface of the filter element 2. The filtered liquid flows upward into the drain chamber and is finally discharged through the outlet pipe 102, thus completing the filtration operation. When the impurities accumulated on the outer surface of the filter element 2 reach a certain thickness, causing the filtration resistance to increase and the liquid output to decrease, the drive component 3 drives the filter element 2 to rotate. At the same time, the dirt-guiding and scraping assembly 5 moves closer to and adheres to the filter element 2, using the rotation of the filter element 2 to scrape off the impurities on its outer surface. During this process, the drain component 6 is opened, and due to the internal structure of the filter body 1... The filter element 2 is cleaned online without stopping the machine or disassembling the filter body 1. This effectively solves the problems of cumbersome cleaning operations, time-consuming and labor-intensive cleaning, and inconvenient maintenance caused by the need to disassemble the filter body 1 to access the filter element 2 in traditional technologies. This reduces the frequency of manual intervention and the intensity of labor.

[0032] In this embodiment, the dirt guiding and scraping assembly 5 includes a dirt guiding cover 51, a cylinder 52, and an elastic dirt scraper 53. The cylinder 52 is installed on the outer side of the cover plate 4. The driving end of the cylinder 52 is connected to the dirt guiding cover 51, which is placed in the filter chamber and located on one side of the filter element 2. The dirt collection chamber is formed between the cover plate 4 and the dirt guiding cover 51. Multiple sets of vertically spaced dirt guiding ports 511 are opened on the dirt guiding cover 51. An elastic dirt scraper 53 is installed on the side of the dirt guiding cover 51 near the filter element 2.

[0033] When self-cleaning is required, cylinder 52 pushes the guide cover 51 closer to the filter element 2, causing the elastic scraper 53 on the guide cover 51 to elastically abut against the outer surface of the filter element 2. Subsequently, drive component 3 drives the filter element 2 to rotate, and the elastic scraper 53 continuously scrapes off the layer of impurities accumulated on the outer surface of the filter element 2. At this time, the drain component 6 is opened. Under the action of pressure difference, the liquid in the filter body 1 carries the scraped impurities and enters the collection chamber through the guide port 511 on the guide cover 51, and then is discharged outward through the drain component 6. In actual use, the guide cover 51 can also be driven by cylinder 52 to move closer to and away from the filter element 2, so that the guide cover 51 acts as a piston in the filter body 1. Under this action, the liquid inside the filter body 1 impacts the impurities on the outer periphery of the filter element 2, making the impurities fall off the outer periphery of the filter element 2 more effectively. It also provides kinetic energy for the liquid carrying impurities to pass through the guide port 511 on the guide cover 51 and enter the collection chamber. The aforementioned guide scraping assembly 5 is driven by the cylinder 52 to move the guide cover 51, which can make the elastic scraping element 53 elastically contact the filter element 2 to achieve the scraping effect. It can also generate a piston effect by reciprocating to approach and move away from the filter element 2, using the liquid impact force to assist in the peeling off of stubborn impurities. At the same time, it provides additional kinetic energy for the impurities to pass through the guide port 511 with the liquid and enter the collection chamber. The dual action improves the efficiency of impurity removal and discharge, ensuring the thoroughness of self-cleaning.

[0034] In this embodiment, the elastic scraper 53 includes an elastic part 531 and a scraper 532. The scraper 532 located on one side of the filter element 2 is installed on the dirt guide cover 51 through the elastic part 531.

[0035] Driven by cylinder 52, the dirt guide cover 51 moves closer to the filter element 2. The scraper 532 on the elastic part 531 elastically presses against the outer periphery of the filter element 2. When the filter element 2 is driven to rotate by the driving member 3, the scraper 532 scrapes off the impurity layer on the outer periphery of the filter element 2.

[0036] In this embodiment, the elastic part 531 includes a connecting rod 5311 and a spring 5312. The connecting rod 5311 is slidably connected to the dirt guide cover 51. The dirt scraper 532 is fixed to one end of the connecting rod 5311 near the filter element 2. The spring 5312 is sleeved on the connecting rod 5311, and the two ends of the spring 5312 are respectively connected to the dirt guide cover 51 and the dirt scraper 532.

[0037] When the dirt guide cover 51 moves toward the filter element 2, the scraper blade 532 first contacts the outer surface of the filter element 2. Then, the dirt guide cover 51 continues to move, and the connecting rod 5311 slides relative to the dirt guide cover 51, causing the spring 5312 between the scraper blade 532 and the dirt guide cover 51 to be compressed, generating a reverse elastic force. This elastic force is transmitted to the scraper blade 532 through the connecting rod 5311, causing the scraper blade 532 to be elastically pressed against the outer surface of the filter element 2. This ensures the contact force required for scraping while avoiding excessive pressure that could damage the filter element 2. When the filter element 2 rotates to scrape dirt, the spring 5312 allows the scraper blade 532 to adaptively fit even when the surface of the filter element 2 is irregular or the thickness of impurities is uneven, thus effectively removing the impurity layer. After cleaning, the cylinder 52 drives the dirt guide cover 51 to retract, the spring 5312 returns to its original deformation, and the scraper blade 532, along with the connecting rod 5311, detaches from the surface of the filter element 2 and returns to the standby position.

[0038] In this embodiment, the driving component 3 includes a motor 31 and a shaft 32. The motor 31 is mounted on the top of the filter body 1, and the output end of the motor 31 is connected to the shaft 32, which is connected to the top of the filter element 2.

[0039] During self-cleaning, the motor 31 drives the shaft 32 to rotate the filter element 2. During the self-cleaning process, the continuous rotation of the filter element 2 causes its entire outer circumferential surface to pass through the scraping position of the dirt guiding and scraping assembly 5 in sequence, so that the impurities on the outer surface of the filter element 2 can be effectively scraped off.

[0040] In this embodiment, the sewage discharge component 6 includes a sewage discharge pipe 61. The outer side of the cover plate 4 is connected to the sewage discharge pipe 61, which communicates with the sewage collection chamber, and a control valve 62 is installed on the sewage discharge pipe 61.

[0041] During self-cleaning and sewage discharge, open the control valve 62 on the sewage pipe 61 to discharge impurities from the sewage collection chamber.

[0042] In this embodiment, a first differential pressure switch 103 extending into the inlet pipe 101 is installed on the inlet pipe 101, a second differential pressure switch 104 extending into the outlet pipe 102 is installed on the outlet pipe 102, and a pressure sensor 105 extending into the drain chamber is installed on the filter body 1.

[0043] The first differential pressure switch 103, the second differential pressure switch 104, the pressure sensor 105, the motor 31, the cylinder 52, and the control valve 62 are all connected to an external control system.

[0044] The first differential pressure switch 103 on the inlet pipe 101 monitors the fluid pressure on the inlet side in real time, and the second differential pressure switch 104 on the outlet pipe 102 monitors the fluid pressure on the outlet side in real time. Under normal filtration conditions, the filter element 2 remains unobstructed, and the pressure difference between the inlet and outlet sides remains within the normal range. Neither the first differential pressure switch 103 nor the second differential pressure switch 104 is triggered. As the filtration time increases, impurities gradually accumulate on the outer surface of the filter element 2, increasing the filtration resistance. The flow rate and pressure on the outlet side relatively decrease, and the pressure difference between the inlet and outlet sides gradually increases. When the pressure difference reaches the set threshold of the first differential pressure switch 103 and the second differential pressure switch 104, the first differential pressure switch 103 and the second differential pressure switch 104 output switch signals to the external control. The system simultaneously monitors the pressure value of the drain chamber using pressure sensor 105 and transmits the pressure signal to the external control system as auxiliary reference data for differential pressure judgment. After receiving the differential pressure switch signal, the external control system combines the data from pressure sensor 105 to make a comprehensive judgment. Once it is confirmed that the degree of blockage of filter element 2 reaches the cleaning trigger condition, it automatically starts motor 31, cylinder 52 and control valve 62 to perform self-cleaning operation. In addition, in actual use, the operator can also preset the timed working time and working interval of motor 31, cylinder 52 and control valve 62 through the external control system according to the needs of the site conditions to realize the active self-cleaning mode, so as to perform preventive cleaning before the filter element 2 has obvious blockage.

[0045] In this embodiment, two sets of symmetrically arranged screws 41 are fixed on the other side of the filter body 1, and the cover plate 4 is sleeved on the two sets of screws 41. Nuts 42 that press the cover plate 4 are threaded onto the screws 41.

[0046] To facilitate the maintenance of filter element 2, nut 42 can be removed from screw 41, and then cover plate 4 can be removed from screw 41 to expose filter element 2 for maintenance. During maintenance, filter element 2 can be rotated by drive component 3 to perform maintenance operations on different surfaces of the outer periphery of filter element 2.

[0047] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A self-cleaning protective filter device, characterized in that, It includes the filter body (1), the filter element (2) and the drive component (3); The filter body (1) has a filter chamber and a drain chamber. The filter element (2) is vertically installed in the filter chamber and rotated by the drive component (3). One side of the filter body (1) is connected to an inlet pipe (101) and an outlet pipe (102). The inlet pipe (101) is connected to the filter chamber, and the outlet pipe (102) is connected to the drain chamber. A cover plate (4) is detachably installed on the other side of the filter body (1). A dirt-guiding scraping assembly (5) is installed on the cover plate (4) and placed inside the filter chamber and located on one side of the filter element (2). The dirt-guiding scraping assembly (5) can move closer to or away from the filter element (2). A dirt collection chamber is formed between the dirt-guiding scraping assembly (5) and the cover plate (4). A drain component (6) communicating with the dirt collection chamber is connected to the outside of the cover plate (4).

2. The self-cleaning protective filter device according to claim 1, characterized in that, The dirt guiding and scraping assembly (5) includes a dirt guiding cover (51), a cylinder (52) and an elastic dirt scraper (53). The cylinder (52) is installed on the outside of the cover plate (4). The driving end of the cylinder (52) is connected to the dirt guiding cover (51) which is placed in the filter chamber and located on one side of the filter element (2). The dirt collection chamber is formed between the cover plate (4) and the dirt guiding cover (51). Multiple sets of vertically spaced dirt guiding ports (511) are opened on the dirt guiding cover (51). An elastic dirt scraper (53) is installed on the side of the dirt guiding cover (51) near the filter element (2).

3. The self-cleaning protective filter device according to claim 2, characterized in that, The elastic scraper (53) includes an elastic part (531) and a scraper (532). The scraper (532) located on one side of the filter element (2) is installed on the dirt guide cover (51) through the elastic part (531).

4. The self-cleaning protective filter device according to claim 3, characterized in that, The elastic part (531) includes a connecting rod (5311) and a spring (5312). The connecting rod (5311) is slidably connected to the dirt guide cover (51). The dirt scraper (532) is fixed to one end of the connecting rod (5311) near the filter element (2). The spring (5312) is sleeved on the connecting rod (5311), and the two ends of the spring (5312) are respectively connected to the dirt guide cover (51) and the dirt scraper (532).

5. A self-cleaning protective filter device according to claim 2, characterized in that, The drive unit (3) includes a motor (31) and a shaft (32). The motor (31) is mounted on the top of the filter body (1). The output end of the motor (31) is connected to the shaft (32), and the shaft (32) is connected to the top of the filter element (2).

6. The self-cleaning protective filter device according to claim 5, characterized in that, The sewage discharge component (6) includes a sewage discharge pipe (61), and the outside of the cover plate (4) is connected to the sewage discharge pipe (61) which communicates with the sewage collection chamber, and a control valve (62) is installed on the sewage discharge pipe (61).

7. A self-cleaning protective filter device according to claim 6, characterized in that, A first differential pressure switch (103) extending into the inlet pipe (101) is installed therein, a second differential pressure switch (104) extending into the outlet pipe (102) is installed therein, and a pressure sensor (105) extending into the drain chamber is installed on the filter body (1).

8. The self-cleaning protective filter device according to claim 1, characterized in that, Two sets of symmetrically arranged screws (41) are fixed on the other side of the filter body (1). The cover plate (4) is sleeved on the two sets of screws (41). Nuts (42) that press the cover plate (4) are threaded onto the screws (41).

9. A self-cleaning protective filter device according to claim 7, characterized in that, The first differential pressure switch (103), the second differential pressure switch (104), the pressure sensor (105), the motor (31), the cylinder (52), and the control valve (62) are all connected to an external control system.

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