Filter clogging indicator

Abstract

The utility model discloses a filter blocking indicator which comprises an indicator shell, a butt joint base, a diaphragm, a spring assembly, a water outlet connecting port and a warning top cover. A water inlet connecting port is formed in one end of the butt joint base, the other end of the butt joint base is connected with the indicator shell, a through hole is formed in the butt joint base, and the through hole is communicated with the water inlet connecting port and the diaphragm base; the water outlet connecting port is connected with an external command pipe through a through hole in the indicator shell and is used for transmitting pressure at the outlet end of the filter; the diaphragm is fixed on the diaphragm base, the lower surface bears pressure at the inlet end of the filter, and the upper surface bears resultant force of pressure at the outlet end of the filter and elastic force of the spring assembly; the warning top cover is in linkage connection with the diaphragm, and when the filter is blocked, the warning top cover gives out a blocking alarm. The indicator is small, exquisite and simple in design, convenient to install and easy to observe, and can objectively and accurately reflect the blocking condition in the filter and give an alarm in time.

Description

Technical Field

[0001] This utility model relates to a filter clogging indicator. Background Technology

[0002] Manual disc and mesh filters are widely used in agriculture, industry, and commerce, such as in food processing, textiles, metallurgy, plastics, pharmaceuticals, building materials, papermaking, HVAC systems in industrial and commercial buildings, irrigation, wastewater treatment, wastewater reuse, municipal water supply, waterworks, large power plants, chemical plants, and emergency filtration. Because the frequency and severity of filter clogging vary depending on water quality and operating conditions, clogging results in significant head loss, which can negatively impact downstream equipment and system stability. Therefore, filter cleaning and maintenance are necessary. Current methods for determining when to clean filters involve installing pressure gauges upstream and downstream of the filter to assess head loss, or manual cleaning based on experience. The former increases costs and requires more installation space, while the latter, relying solely on experience, carries significant operational risks. Therefore, the market needs a simple, easy-to-install, and easily observable warning device that can objectively and accurately indicate whether a filter is clogged.

[0003] The following defects exist:

[0004] 1) Operators rely on experience to judge whether the filter is clogged based on water quality and the operating status of downstream equipment. It is difficult to objectively and accurately judge the internal blockage of the filter and the maintenance and cleaning time.

[0005] 2) Installing pressure detection devices upstream and downstream of the filter can provide more accurate readings, but it requires many additional installation accessories, greatly increases the installation space, and has a higher installation cost. Utility Model Content

[0006] To address the above technical problems, this utility model provides a filter clogging indicator, the technical solution of which is as follows:

[0007] A filter clogging indicator includes a housing, a docking base, a diaphragm, a spring assembly, and an alarm top cover. The diaphragm and the spring assembly are housed within the housing, and the alarm top cover is positioned on the top of the housing. One end of the docking base has a water inlet port, and the other end is connected to the housing. The docking base has a through-hole for transmitting fluid pressure from the water inlet port to the lower surface of the diaphragm. A diaphragm base is positioned around the end of the docking base near the through-hole. The diaphragm has elastic deformation capability, and the periphery of its lower surface can seal against the diaphragm base and close the through-hole. The alarm top cover and the diaphragm are linked by the spring assembly. When the filter is clogged, the spring assembly causes the alarm top cover to trigger a clogging alarm. The alarm top cover employs a magnetic adsorption design. The spring assembly includes a spring and a connecting rod. The spring is fitted onto the connecting rod, one end of which is connected to the diaphragm, and the other end to the alarm top cover. The spring preload is calibrated by rotating an adjustment knob on the top of the housing.

[0008] The advantages of this technical solution are as follows:

[0009] Single pressure monitoring mechanism: It relies solely on the antagonistic relationship between the inlet pressure P1 and the spring preload, eliminating the need for an outlet pressure acquisition pipeline;

[0010] Adjustable threshold design: The spring compression can be adjusted by a knob to match the alarm threshold to different filter pressure ratings;

[0011] Mechanical direct-acting trigger: When the pressure exceeds the limit, the warning top cover is directly driven to move, avoiding the reliability risks caused by electronic components;

[0012] Quick reset function: The magnetic adsorption structure balances the resistance to the pop-out of the warning cover with the ease of reset, which is in line with the operating habits of industrial scenarios.

[0013] This solution "does not require an external command tube" and completes pressure monitoring and warning functions through a purely mechanical structure, making it particularly suitable for working environments with limited space or poor water conductivity.

[0014] Preferably, it further includes: a water outlet connection port; the water outlet connection port is connected to an external command pipe through an internal channel of the housing, and is used to transmit the fluid pressure at the filter outlet to the upper surface of the diaphragm; the diaphragm is fixed on the docking base, its lower surface bears the pressure at the filter inlet, and its upper surface bears the combined force of the pressure at the filter outlet and the elastic force of the spring assembly; when the combined force is less than the pressure at the filter inlet, the diaphragm is lifted, triggering the warning top cover to pop out and displaying a blockage alarm.

[0015] Preferably, the warning cover is triggered by at least one of pop-up displacement, audible alarm, or visual warning.

[0016] Preferably, the inlet and outlet water connection ports are constructed using any one of threaded connection, snap-fit ​​connection, or flange connection.

[0017] Preferably, a sealing gasket is provided at the junction of the upper end of the diaphragm and the outer shell; a sealing ring is provided between the docking base and the outer shell.

[0018] Preferably, the contact surface between the diaphragm base and the diaphragm is designed as a plane or a curved surface to achieve uniform pressure distribution.

[0019] Preferably, the preload of the spring assembly is adjustable to adapt to the working pressure range of different filters; the warning top cover is a red resettable structure that automatically resets to the closed state after the filter is backwashed.

[0020] Preferably, the inlet and outlet connection ports adopt standard threaded interfaces, which can be directly connected to the filter pipe without additional installation accessories; the command tube is a flexible tube with an outer diameter of 8mm, used to transmit the pressure at the filter outlet end to the upper surface of the diaphragm; the diaphragm is made of elastic and corrosion-resistant materials, including but not limited to rubber, silicone or polyurethane.

[0021] Preferably, the blockage indicator is suitable for disc filters or mesh filters, and monitors the blockage status in real time and triggers a visual warning.

[0022] This patented product features a compact and simple design, making it easy to install and observe. It can objectively and accurately reflect the clogging status inside the filter and provide timely warnings. The device can be installed directly upstream or downstream of the filter without occupying additional installation space or requiring any additional installation accessories. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of the blockage indicator.

[0024] Figure 2 A schematic diagram for installing a blockage indicator.

[0025] Figure 3 This is a schematic diagram of the internal structure of the indicator when the filter is in a clean state.

[0026] Figure 4 This is a schematic diagram of the internal structure of the indicator when the filter is clogged.

[0027] The attached figure labels are summarized as follows:

[0028] Filter inlet connection 8, command pipe 9, blockage indicator 10, filter outlet connection 11.

[0029] Indicator housing 101, indicator inlet connection port 102, indicator outlet connection port 103, spring assembly 104, diaphragm 105, diaphragm base 106, warning top cover 107, sealing ring 108, docking base 109, rubber gasket 110.

[0030] Connecting rod 1041, fixed joint 1042, spring 1043.

[0031] Filter inlet pressure P1, filter outlet pressure P2, spring force P of spring assembly 104 弹 . Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0033] The structure of this utility model is described as follows:

[0034] Figure 1 This is a schematic diagram of the internal structure of the indicator.

[0035] like Figure 1 As shown, the structure of the new blockage indicator 10 mainly consists of an indicator housing 101, a docking base 109, a diaphragm 105, a spring assembly 104, a water outlet connection port 103, and a warning top cover 107.

[0036] The indicator docking base 109 adopts a male-female threaded connector design, with the joint with the indicator housing 101 having a male thread structure. A diaphragm base 106 is designed on its top, which perfectly fits the diaphragm and provides necessary support for the diaphragm 105. The other end of the indicator base 109 has a water inlet connection port 102, which uses a female thread structure and connects to the filter water inlet connection port 8. A through hole is provided in the central part of the docking base 109, which leads directly to the diaphragm base 106, allowing the pressure from the filter water inlet connection port 8 to act directly on the diaphragm 105. In addition, to ensure the sealing of the indicator's internal structure, a sealing ring 108 is specially installed on the docking base 109.

[0037] The spring assembly 104 consists of a connecting rod 1041, a fixed connector 1042, and a spring 1043. The upper end of the connecting rod receives the red warning cap 107, and the lower end receives the diaphragm 105. The spring 1043 is fitted onto the connecting rod 1041. A flared rubber gasket 110 is designed at the junction of the upper end of the diaphragm 105 and the limiting structure of the outer shell 101 to provide a seal and ensure that the pressure at the inlet connection port 102 and the outlet connection port 103 is fully applied to the diaphragm 105.

[0038] Figure 2 A schematic diagram of the indicator installation.

[0039] like Figure 2 As shown, the water outlet connection port 103 is connected to the internal structure of the indicator 10 through the through hole built into the indicator housing 101, and then connected to the water outlet connection port 11 of the filter through the 8mm command tube 9.

[0040] The installation and working principle of this utility model are explained as follows:

[0041] like Figure 1 As shown, the water outlet connection port 103 may not be necessary. Without the water outlet connection port 103, the blockage indicator 10 mainly consists of an indicator housing 101, a docking base 109, a diaphragm 105, a spring assembly 104, and a warning top cover 107. The docking base 109 has a water inlet connection port 102 at one end, which transmits the filter inlet pressure P1 directly to the lower surface of the diaphragm 105 through an internal through-hole; the other end is threaded to the housing 101, with a sealing ring 108 at the joint to ensure airtightness. The diaphragm 105 is fixed to a diaphragm base 106 on top of the docking base 109, its lower surface continuously bearing the inlet pressure P1, while its upper surface is balanced by the pre-tightening force P of the spring assembly 104.

[0042] The spring assembly 104 consists of a connecting rod 1041, a spring 1043, and a fixing joint 1042. The preload of the spring 1043 is calibrated by rotating an adjustment knob (not shown in the figure) on the top of the housing 101, so that the spring force P corresponds to the preset clogging alarm threshold pressure. When the filter is working normally, P1 ≤ P 弹 The diaphragm 105 is pressed tightly against the diaphragm base 106 by spring pressure, and the warning top cover 107 is in the closed state; when the filter is clogged, causing P1>P 弹 At this time, the diaphragm 105 is lifted, which causes the connecting rod 1041 to move upward and triggers the warning cover 107 to pop out, revealing a conspicuous red warning sign.

[0043] Specifically, the spring preload calibration range is 0.1-0.6 MPa, and can be adapted to different operating conditions via a knob scale. The warning top cover 107 adopts a magnetic adsorption design, and can be manually pressed back to the closed state when P1 returns to the safe range after backflushing. A corrugated sealing gasket is provided between the diaphragm 105 and the base 106, which ensures pressure transmission accuracy while allowing diaphragm deformation. This embodiment does not require connection to the filter outlet end; blockage warning can be achieved simply by monitoring changes in inlet pressure, greatly simplifying the installation process.

[0044] like Figure 2 As shown, the blockage indicator 10 is connected to the filter inlet connection port 8 via the inlet connection port 102. At the same time, the indicator's outlet connection port 103 is connected to the filter's outlet connection port 11 via an 8mm command pipe 9.

[0045] Figure 3 This is a schematic diagram of the internal structure of the indicator when the filter is in a clean state.

[0046] like Figure 3 As shown, the upper end of the diaphragm 105 inside the blockage indicator 10 is subjected to two pressures: P 弹 With P2, where P 弹 The downward pressure exerted by the spring, P2 is the outlet pressure of the filter; the lower end of the diaphragm 5 is subjected to a pressure P1, which is the inlet pressure of the filter.

[0047] When the filter element is clean, the local pressure loss generated by the filter is very small, and the pressures at the filter inlet and outlet are similar, i.e., P1 and P2 are close. At this time, the pressure P2+P on the diaphragm 5 inside the blockage indicator is... 弹 >P1, that is, the pressure at the upper end of the diaphragm 105 is greater than the pressure at its lower end. In this case, the diaphragm 105 and the diaphragm base 106 are tightly closed.

[0048] Figure 4 This is a schematic diagram of the internal structure of the indicator when the filter is clogged.

[0049] like Figure 4 As shown, when the filter is severely clogged, the local pressure loss generated by the filter increases, resulting in a decrease in the pressure at the filter outlet, i.e., P2 < P1. At this time, the pressure P2 + P1 borne by the diaphragm 5 inside the clogging indicator is reduced. 弹 <P1, meaning the pressure on the upper end of diaphragm 105 is less than the pressure on its lower end, under this pressure difference, diaphragm 105 is lifted and separated from diaphragm base 106. Subsequently, the red warning cover 107 connected to diaphragm 105 is popped out, thus issuing a blockage alarm. The blockage alarm can be audible, the warning cover 107 popping out, or even other methods.

[0050] When the filter backwashing process is completed, the pressure on the diaphragm 105 returns to the state of a clean filter element, the diaphragm 105 and the diaphragm base 106 close tightly again, and the red top cover 107 of the blockage indicator automatically resets.

[0051] The above description is a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications are also considered to be within the protection scope of the present utility model, and the protection scope of the present utility model shall be defined by the claims.

Claims

1. A filter clogging indicator, characterized in that, include: The outer casing (101), docking base (109), diaphragm (105), spring assembly (104), and warning top cover (107); The diaphragm (105) and the spring assembly (104) are placed inside the housing (101), and the warning top cover (107) is placed on the top of the housing (101); One end of the docking base (109) is provided with a water inlet connection port (102), and the other end is connected to the outer shell (101). The docking base (109) is provided with a through hole for transmitting the fluid pressure of the water inlet connection port (102) to the lower surface of the diaphragm (105). The docking base (109) is provided with a diaphragm base (106) around one end of the through hole near the outer shell (101). The diaphragm (105) has elastic deformation capability, and the periphery of the lower surface of the diaphragm (105) can seal and fit the diaphragm base (106) and close the through hole; The warning top cover (107) and the diaphragm (105) are linked together by the spring assembly (104). When the filter is clogged, the diaphragm (105) causes the warning top cover (107) to trigger a clogging alarm. The warning top cover (107) adopts a magnetic adsorption design. The spring assembly (104) includes a spring (1043) and a connecting rod (1041). The spring (1043) is fitted onto the connecting rod (1041). One end of the connecting rod (1041) is connected to the diaphragm (105), and the other end is connected to the warning top cover (107). The preload of the spring (1043) is calibrated by rotating the adjustment knob on the top of the housing (101).

2. The filter clogging indicator according to claim 1, characterized in that, Also includes: Water outlet connection port (103); The outlet connection port (103) is connected to the external command pipe (9) through the internal channel of the housing (101) to transmit the fluid pressure at the filter outlet to the upper surface of the diaphragm (105); The diaphragm (105) is fixed on the docking base (109), and its lower surface bears the filter inlet pressure (P1), and its upper surface bears the combined force of the filter outlet pressure (P2) and the elastic force (P_spring) of the spring assembly (104). When the combined force is less than the filter inlet pressure (P1), the diaphragm (105) is lifted, triggering the warning cover (107) to pop out and display a blockage alarm.

3. The filter clogging indicator according to claim 2, characterized in that, The warning cover (107) is triggered by at least one of pop-up displacement, audible alarm, or visual warning.

4. The filter clogging indicator of claim 2, wherein, The inlet connection port (102) and outlet connection port (103) are connected by any one of threaded connection, snap-fit ​​connection or flange connection.

5. The filter clogging indicator of claim 2, wherein, A sealing gasket (110) is provided at the junction of the upper end of the diaphragm (105) and the outer shell (101); a sealing ring (108) is provided between the docking base (109) and the outer shell (101).

6. The filter clogging indicator according to claim 2, characterized in that, The contact surface between the diaphragm base (106) and the diaphragm (105) is designed as a plane or a curved surface to achieve uniform pressure distribution.

7. The filter clogging indicator of claim 2, wherein, The preload of the spring assembly (104) is adjustable to adapt to the working pressure range of different filters; the warning top cover (107) is a red resettable structure that automatically resets to the closed state after the filter is backwashed.

8. The filter clogging indicator according to claim 2, characterized in that, The inlet connection port (102) and outlet connection port (103) adopt standard threaded interfaces and can be directly connected to the filter pipe without additional installation accessories; the command pipe (9) is a flexible pipe with an outer diameter of 8mm, used to transmit the filter outlet pressure (P2) to the upper surface of the diaphragm (105); the diaphragm (105) is made of elastic corrosion-resistant materials, including but not limited to rubber, silicone or polyurethane.

9. The filter clogging indicator of claim 2, wherein, The blockage indicator is applicable to disc filters or mesh filters, and monitors the blockage status in real time and triggers a visual warning.

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