A filter core self-cleaning filter device based on differential pressure detection

Abstract

The utility model discloses a filter core self -cleaning filter device based on differential pressure detection belongs to water treatment technical field. It includes filter body, filter core subassembly, differential pressure detection subassembly and self -cleaning execution subassembly. Filter body forms the closed filter chamber, and filter core subassembly is located in it, and the outside is the area to be filtered, and the inside is the clean area, differential pressure detection subassembly detects the differential pressure of filter core both sides through two pressure sensors respectively, and the controller controls the action of self -cleaning execution subassembly according to the differential pressure signal. Self -cleaning execution subassembly contains annular scraper, drive mechanism and ultrasonic vibrator, can reciprocate along filter core axial motion and synchronous vibration, and cooperate electric blow -off valve and discharge impurity, and the controller can also realize remote monitoring through wireless communication module. The device realizes filter core state accurate judgment and efficient self -cleaning, and improves the filtration stability and intelligent level.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to a filter cartridge self-cleaning filtration device based on differential pressure detection. Background Technology

[0002] In industrial fluid processing and water purification, cartridge-type filtration devices are widely used due to their simple structure and high filtration accuracy. These devices purify fluids by intercepting impurities through the filter element. However, over long-term use, impurities gradually accumulate on the surface of the filter element, leading to increased filtration resistance and decreased efficiency. Regular cleaning or replacement of the filter element is necessary to maintain the normal operation of the device.

[0003] Existing filter cartridge cleaning methods have significant limitations: traditional manual cleaning requires machine shutdown and disassembly, which not only affects production continuity but also increases labor costs; some automatic cleaning devices use a single backwashing or mechanical scraping structure, which has limited effectiveness in cleaning highly adhesive impurities and lacks a precise clogging status judgment mechanism, often leading to excessive energy consumption or premature filter cartridge damage due to improper cleaning timing. Furthermore, most devices lack intelligent linkage, making it impossible to remotely monitor filter cartridge status and the cleaning process, thus failing to meet the automation management needs of modern industry.

[0004] Therefore, this invention proposes a filter element self-cleaning filtration device based on differential pressure detection to at least partially solve the above problems. Utility Model Content

[0005] To address the aforementioned problems in existing technologies, this utility model provides a filter element self-cleaning filtration device based on differential pressure detection. This solves the problems of traditional manual cleaning requiring machine shutdown and disassembly, which affects production continuity and increases labor costs; some automatic cleaning devices use a single cleaning structure, which has limited cleaning effect on highly adhesive impurities; the lack of a precise clogging judgment mechanism leads to inappropriate cleaning timing; and most of them do not achieve intelligent linkage, cannot be remotely monitored, and are difficult to adapt to the needs of modern industrial automation management.

[0006] The objective of this utility model can be achieved through the following technical solution: a filter element self-cleaning filtration device based on differential pressure detection, comprising: The filter body consists of a filter base with an inlet and a drain outlet, a filter top cover with an outlet, and a filter cylinder connecting the filter base and the filter top cover, forming a closed filter chamber. A filter element assembly is disposed inside the filter cylinder; the upper end of the filter element assembly is sealed to the filter top cover, and the lower end is sealed to the filter base. The differential pressure detection component includes a first pressure sensor, a second pressure sensor, and a controller. The first pressure sensor is located in the filter area between the inlet of the filter base and the filter element assembly. The second pressure sensor is located in the clean area inside the filter element assembly. Both sensors are electrically connected to the controller and are used to detect the pressure difference across the filter element assembly. The self-cleaning actuator is located inside the filter cartridge and cooperates with the filter element assembly. The controller is electrically connected to the self-cleaning actuator to control its operation in response to a differential pressure signal.

[0007] As a preferred embodiment of this utility model, the self-cleaning actuator includes an annular scraper and a drive mechanism; the annular scraper is attached to the outer surface of the filter element assembly, and its inner diameter is adapted to the outer diameter of the filter element assembly; the drive mechanism is fixed to the filter top cover, and its output end is connected to the annular scraper, for driving the annular scraper to reciprocate along the axial direction of the filter element assembly.

[0008] As a preferred embodiment of the present invention, the self-cleaning actuator further includes an ultrasonic vibrator, which is disposed on the annular scraper and electrically connected to the controller.

[0009] As a preferred embodiment of this utility model, the inner wall of the annular scraper is provided with a guide block, and the outer wall of the filter element assembly is provided with a corresponding guide groove, with the guide block embedded in the guide groove.

[0010] As a preferred embodiment of this invention, both the first pressure sensor and the second pressure sensor are diffused silicon pressure sensors.

[0011] As a preferred technical solution of this utility model, the drain port of the filter base is provided with an electric drain valve, and the electric drain valve is electrically connected to the controller.

[0012] As a preferred embodiment of this utility model, the controller is equipped with a wireless communication module for transmitting differential pressure data and self-cleaning status to a remote terminal.

[0013] The beneficial effects of this invention are as follows: By setting pressure sensors on both sides of the filter element assembly, the differential pressure can be accurately detected to determine the blockage status, ensuring accurate triggering of the self-cleaning action and avoiding energy waste or filter element damage; the self-cleaning actuator adopts a composite cleaning method combining the axial reciprocating motion of the annular scraper and ultrasonic vibration, which can efficiently remove highly adhesive impurities and contaminants embedded in the filter element pores, improving the cleaning effect; the cooperation between the guide block and the guide groove ensures the stability of the annular scraper's movement, avoiding additional wear on the filter element during the cleaning process; the electric drain valve opens synchronously with the self-cleaning action, which can promptly discharge impurities and prevent secondary pollution; the controller's wireless communication module enables remote monitoring of differential pressure data and cleaning status, improving the intelligence level of the device, reducing manual intervention overall, ensuring the continuity and stability of the filtration process, extending the filter element's service life, and reducing maintenance costs. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a block diagram of the main structure of this utility model.

[0016] In the diagram: 100, filter base; 101, water inlet; 102, drain outlet; 200, filter cylinder; 201, first pressure sensor; 202, second pressure sensor; 203, annular scraper; 204, drive mechanism; 300, filter element assembly; 301, area to be filtered; 302, clean area; 400, filter top cover; 401, water outlet. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Please see Figure 1 This embodiment provides a filter cartridge self-cleaning filtration device based on differential pressure detection, specifically including: The filter body consists of a filter base 100, a filter cylinder 200, and a filter top cover 400, forming a closed filter chamber. The filter base 100 has an inlet 101 for the fluid to be filtered to enter and a drain 102 for the discharge of impurities generated during cleaning; the filter top cover 400 has an outlet 401 for the discharge of purified fluid; the filter cylinder 200 connects the filter base 100 and the filter top cover 400, forming a closed space to accommodate the internal components.

[0019] Filter element assembly 300: Vertically installed inside the filter cylinder 200, with its upper end sealed to the filter top cover 400 and its lower end sealed to the filter base 100. Its outer side is the filter area 301, which is the area of ​​the unpurified fluid containing impurities, and its inner side is the clean area 302, which is the area of ​​the purified fluid. Impurities are intercepted and the fluid is purified through the pores of the filter element.

[0020] Differential pressure detection component: includes a first pressure sensor 201, a second pressure sensor 202, and a controller. The first pressure sensor 201 is located in the filter area 301 between the inlet 101 of the filter base 100 and the filter element assembly 300 to detect the pressure of the unfiltered fluid; the second pressure sensor 202 is located in the clean area 302 inside the filter element assembly 300 to detect the pressure of the purified fluid; both sensors are electrically connected to the controller, which determines the degree of filter element blockage by calculating the pressure difference between the two sides. Specifically, the controller has a built-in data processing module that calculates the pressure difference in real time using a preset algorithm. The pressure difference is equal to the difference between the first pressure sensor 201 and the second pressure sensor 202. When the filter element surface is free of impurities or only slightly clogged, the resistance to fluid flow through the filter element is small, and the pressure difference is within the initial threshold range. As impurities gradually accumulate on the outside of the filter element, the filtration resistance increases, and the pressure difference rises accordingly. When the pressure difference reaches the controller's preset critical threshold, the controller determines that the filter element has reached the level of clogging that requires cleaning and then triggers the self-cleaning execution component to start. After cleaning is completed, as the impurities are removed, the pressure difference gradually decreases. When it reaches the initial threshold range, the controller controls the self-cleaning execution component to stop working, completing one cleaning cycle.

[0021] It should be noted that both the first pressure sensor 201 and the second pressure sensor 202 mentioned above are diffused silicon pressure sensors. The advantages of this type of sensor are that it operates based on the semiconductor piezoresistive effect, featuring high measurement accuracy and fast response speed. It can accurately capture minute pressure changes across the filter element, ensuring the accuracy of differential pressure detection and providing reliable data support for judging the filter element's blockage status. Simultaneously, it has good stability and anti-interference capabilities, adapting to complex operating conditions such as fluid pressure fluctuations and temperature changes within the filtration device, and is not prone to drift over long-term use. Furthermore, the diffused silicon sensor has a compact structure and small size, making it easy to install within the limited space of the filter body. It also has good compatibility with the controller's electrical signals, directly converting pressure signals to electrical signals, simplifying the circuit connection and data transmission process of the differential pressure detection component, and ensuring the efficient and stable operation of the entire device's pressure monitoring system.

[0022] The self-cleaning actuator is located inside the filter housing 200 and works with the filter element assembly 300 to achieve the cleaning function. Its operation is controlled by the controller based on the differential pressure signal. Specifically, it includes: an annular scraper 203, which is attached to the outer surface of the filter element assembly 300 and whose inner diameter is adapted to the outer diameter of the filter element assembly 300, for mechanically removing surface impurities; a drive mechanism 204, which is fixed to the filter top cover 400 and whose output end is connected to the annular scraper 203, driving the annular scraper 203 to reciprocate along the axial direction of the filter element assembly 300; and an ultrasonic vibrator, which is located on the annular scraper 203 and electrically connected to the controller, and synchronously emits ultrasonic vibrations when the annular scraper 203 moves to enhance the removal effect on adhesive impurities.

[0023] Preferably, the inner wall of the annular scraper 203 is provided with a guide block, and the outer wall of the filter element assembly 300 is provided with a corresponding guide groove. The guide block is embedded in the guide groove to ensure the stability of the movement of the annular scraper 203. At the same time, the electric drain valve is located at the drain port 102 of the filter base 100 and is electrically connected to the controller. It opens synchronously when the self-cleaning execution component is activated to discharge impurities in a timely manner. In addition, the wireless communication module is integrated into the controller, which can send differential pressure data and self-cleaning status to a remote terminal to realize remote monitoring.

[0024] The working principle of this utility model is as follows: The fluid to be filtered enters the filter body from the inlet 101 of the filter base 100, flows through the filter area 301 outside the filter element assembly 300 in the closed filter chamber, and after being filtered through the filter element pores, impurities are intercepted on the outside of the filter element. The purified fluid enters the clean area 302 inside the filter element and is finally discharged from the outlet 401 of the filter top cover 400.

[0025] During the process, the differential pressure detection component operates in real time: the first pressure sensor 201 detects the pressure (P1) in the filter zone 301, and the second pressure sensor 202 detects the pressure (P2) in the clean zone 302. Both sensors transmit data to the controller, which calculates the pressure difference: ΔP (pressure difference) = P1 - P2. When impurities accumulate on the filter element surface, causing ΔP to rise to the critical threshold, the controller determines that the filter element needs cleaning and immediately triggers the self-cleaning execution component: the drive mechanism 204 drives the annular scraper 203 to reciprocate along the filter element axis, mechanically peeling off surface impurities. Simultaneously, the ultrasonic vibrator on the annular scraper 203 operates synchronously, using high-frequency vibration to break the binding force between adhesive impurities and the filter element. The guide block and guide groove cooperate to ensure smooth scraper movement. During this process, the electric drain valve opens synchronously, discharging the peeled impurities from the drain port 102 of the filter base 100.

[0026] Once cleaning is complete and impurities are effectively removed, ΔP drops to the initial threshold range. The controller then stops the self-cleaning actuator, closes the electric drain valve, and the device returns to filtration mode. Simultaneously, the controller transmits real-time differential pressure data and cleaning status information to a remote terminal via a wireless communication module, enabling fully intelligent monitoring and management.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A filter cartridge self-cleaning filtration device based on differential pressure detection, characterized in that, include: The filter body consists of a filter base with an inlet and a drain outlet, a filter top cover with an outlet, and a filter cylinder connecting the filter base and the filter top cover, forming a closed filter chamber. A filter element assembly is disposed inside the filter cylinder; the upper end of the filter element assembly is sealed to the filter top cover, and the lower end is sealed to the filter base. The differential pressure detection component includes a first pressure sensor, a second pressure sensor, and a controller. The first pressure sensor is located in the filter area between the inlet of the filter base and the filter element assembly. The second pressure sensor is located in the clean area inside the filter element assembly. Both sensors are electrically connected to the controller and are used to detect the pressure difference across the filter element assembly. The self-cleaning actuator is located inside the filter cartridge and cooperates with the filter element assembly. The controller is electrically connected to the self-cleaning actuator to control its operation in response to a differential pressure signal.

2. The filter element self-cleaning filtration device based on differential pressure detection according to claim 1, characterized in that, The self-cleaning actuator includes an annular scraper and a drive mechanism; the annular scraper is attached to the outer surface of the filter element assembly, and its inner diameter is adapted to the outer diameter of the filter element assembly; the drive mechanism is fixed to the filter top cover, and its output end is connected to the annular scraper, which is used to drive the annular scraper to reciprocate along the axial direction of the filter element assembly.

3. The filter element self-cleaning filtration device based on differential pressure detection according to claim 2, characterized in that, The self-cleaning actuator also includes an ultrasonic vibrator, which is mounted on the annular scraper and electrically connected to the controller.

4. The filter element self-cleaning filtration device based on differential pressure detection according to claim 3, characterized in that, The inner wall of the annular scraper is provided with a guide block, and the outer wall of the filter element assembly is provided with a corresponding guide groove, with the guide block embedded in the guide groove.

5. The filter element self-cleaning filtration device based on differential pressure detection according to claim 1, characterized in that, Both the first pressure sensor and the second pressure sensor are diffused silicon pressure sensors.

6. The filter element self-cleaning filtration device based on differential pressure detection according to claim 1, characterized in that, The filter base is equipped with an electric drain valve at its drain outlet, and the electric drain valve is electrically connected to the controller.

7. The filter element self-cleaning filtration device based on differential pressure detection according to claim 1, characterized in that, The controller is equipped with a wireless communication module for sending differential pressure data and self-cleaning status to a remote terminal.

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