Backwash filter and liquid analysis system

Abstract

The utility model relates to the field of liquid analysis, in particular to a backwashing filter and a liquid analysis system. Comprising a main body, an inner cavity is formed in the main body, a water inlet and a water outlet which are communicated with the inner cavity are further formed in the main body, a filter screen and a spraying screen which are located between the water inlet and the water outlet are further arranged in the inner cavity, the spraying screen is close to the water outlet, and a plurality of spraying holes are formed in the spraying screen. Liquid flowing back from the water outlet is divided into a plurality of water flows through the spraying holes of the spraying net, and the water flows are sprayed on the filter net to perform reverse cleaning on the filter net; and the main body is also provided with a drain outlet for discharging liquid for backwashing. The utility model provides a backwashing filter and a liquid analysis system, which can be used for backwashing a filter screen and reducing the blockage condition of the filter screen.

Description

Technical Field

[0001] This application relates to the field of liquid analysis, and in particular to a backwash filter and a liquid analysis system. Background Technology

[0002] The descriptions in this section provide background information related to this disclosure only and do not constitute prior art. Various liquid tanks require water quality testing during use. Because liquid tanks contain impurities, a filter needs to be added at the front end of the analyzer. Related technologies generally use unidirectional filters to filter liquids. However, after a period of use, a large amount of impurities accumulate on the filter screen. These impurities affect the filtration speed and efficiency, and may even clog the filter, preventing filtration. Therefore, the filter screen needs to be removed and cleaned promptly, requiring downtime for filter replacement, which disrupts operation and takes a considerable amount of time. Summary of the Invention

[0003] In view of this, this application provides a backwashing filter and a liquid analysis system that can backwash the filter screen to reduce filter screen clogging.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A backwash filter, characterized in that: it includes a main body, an inner cavity is provided inside the main body, an inlet and an outlet communicating with the inner cavity are also provided on the main body, a filter screen and a spray screen are also provided in the inner cavity between the inlet and the outlet, the spray screen is close to the outlet and has multiple spray holes, the liquid flowing back from the outlet is divided into multiple streams of water through the spray holes of the spray screen and sprayed onto the filter screen to backwash the filter screen; the main body is also provided with a drain outlet for discharging the backwash liquid.

[0006] The backwash filter described in this application adds a spray screen between the inlet and outlet, allowing the liquid flowing back from the outlet to clean the filter screen in reverse, thus reducing filter screen clogging and extending its service life.

[0007] In some embodiments, a gasket is also provided between the filter screen and the spray screen. Adding the gasket creates a certain distance between the spray screen and the filter screen, thus improving the spraying effect.

[0008] In some embodiments, the main body includes a lower housing and an upper cover. The inner cavity is disposed in the lower housing. The upper end of the lower housing is provided with a mounting groove. The upper cover is detachably fixedly connected to the upper end of the lower housing and closes the mounting groove. The water outlet is disposed on the upper cover. The bottom of the mounting groove is connected to the inner cavity. A first sealing ring is provided at the bottom of the mounting groove. The filter screen is disposed above the first sealing ring. The gasket is disposed above the filter screen. A second sealing ring is disposed above the gasket. The spray screen is disposed above the second sealing ring. A pressure ring for pressing the spray screen is also provided above the spray screen and fixedly connected to the mounting groove.

[0009] In some embodiments, the sidewall of the mounting groove is provided with internal threads, and the outer periphery of the pressure ring is provided with external threads, the pressure ring being threadedly connected to the mounting groove; the outer wall of the upper end of the lower housing is provided with external threads, the upper cover is provided with internal threads, and the upper cover and the lower housing are also threadedly connected. The threaded connection facilitates later assembly and disassembly.

[0010] In some embodiments, a third sealing ring is also provided between the upper cover and the lower housing.

[0011] In some embodiments, the water inlet is located in the middle of the lower housing, and the drain outlet is located at the lower end of the lower housing.

[0012] This application also provides a liquid analysis system, characterized in that: it has the aforementioned backwash filter, and further includes an inlet pipe connected to an inlet, an outlet pipe connected to an outlet, and a drain pipe connected to a drain outlet; the inlet pipe is equipped with a water pump and a first valve, the first valve being located between the water pump and the inlet for selectively switching the pipe; the outlet pipe is equipped with a solution analyzer, the solution analyzer being connected to a liquid collection container via a second pipe, the solution analyzer having an internal pump; the outlet pipe is equipped with a second valve for selectively switching the pipe.

[0013] In some embodiments, the liquid collection container is equipped with a level gauge for detecting whether the liquid in it is full. The liquid analysis system also includes a control module connected to the level gauge, the solution analyzer, the first valve, and the second valve. When the level gauge detects that the liquid collection container is full, the control module controls the first valve to close and the second valve to open. The internal pump of the solution analyzer reverses to return the liquid in the liquid collection container to the filter for backwashing.

[0014] In some implementations, the inlet pipe and the outlet pipe are connected to the same liquid tank.

[0015] In some implementations, both the first valve and the second valve are solenoid valves.

[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0017] This application discloses a backwash filter that uses a spray screen between the inlet and outlet. The liquid flowing back from the outlet can clean the filter screen in reverse, thus reducing clogging and extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of this application;

[0019] Figure 2 This is an exploded view of the first embodiment of this application;

[0020] Figure 3 This is a cross-sectional view of the first embodiment of this application;

[0021] Figure 4 This is a schematic diagram showing the backwashing process in the first embodiment of this application;

[0022] Figure 5 This is a usage diagram for liquid analysis according to the second embodiment of this application;

[0023] Figure 6 This is a diagram showing the backwashing process according to the second embodiment of this application.

[0024] Labeling Explanation: 1. Backwash Filter; 11. Lower Housing; 111. Inner Cavity; 112. Inlet; 113. Drain; 114. Mounting Groove; 12. Top Cover; 121. Outlet; 13. Filter Screen; 14. Spray Screen; 15. Gasket; 16. First Sealing Ring; 17. Second Sealing Ring; 18. Pressure Ring; 19. Third Sealing Ring; 2. Inlet Pipeline; 3. Outlet Pipeline; 4. Drain Pipeline; 5. Water Pump; 6. First Valve; 7. Solution Analyzer; 8. Second Pipeline; 9. Liquid Collection Container; 10. Second Valve; 101. Level Gauge; 102. Liquid Pool. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.

[0026] Example 1:

[0027] See Figures 1 to 4This application provides a backwash filter 1, including a main body with an inner cavity 111. The main body is also provided with an inlet 112 and an outlet 121 communicating with the inner cavity 111. The inner cavity 111 is also provided with a filter screen 13 and a spray screen 14 located between the inlet 112 and the outlet 121. The spray screen 14 is close to the outlet 121 and has multiple spray holes. The liquid returning from the outlet 121 is divided into multiple streams of water through the spray holes of the spray screen 14 and sprayed onto the filter screen 13 to backwash the filter screen 13, similar to the water output of a shower head, which can evenly rinse the filter screen 13. The main body is also provided with a drain outlet 113 for discharging the backwash liquid.

[0028] This filter, by adding a spray screen 14 between the inlet 112 and the outlet 121, allows the liquid flowing back from the outlet 121 to clean the filter screen 13 in reverse, thus reducing filter screen clogging and extending the filter screen's service life.

[0029] A gasket 15 is also provided between the filter screen 13 and the spray screen 14. The addition of the gasket 15 is to create a certain distance between the spray screen 14 and the filter screen 13, which can improve the spraying effect.

[0030] The main body includes a lower shell 11 and an upper cover 12. An inner cavity 111 is disposed in the lower shell 11. An installation groove 114 is provided at the upper end of the lower shell 11. The upper cover 12 is detachably fixedly connected to the upper end of the lower shell 11 and closes the installation groove 114. A water outlet 121 is provided on the upper cover 12. The bottom of the installation groove 114 is connected to the inner cavity 111. A first sealing ring 16 is provided at the bottom of the installation groove 114. A filter screen 13 is disposed above the first sealing ring 16. A gasket 15 is disposed above the filter screen 13. A second sealing ring 17 is disposed above the gasket 15. A spray net 14 is disposed above the second sealing ring 17. A pressure ring 18 is also disposed above the spray net 14 and is fixedly connected to the installation groove 114 for pressing the spray net 14.

[0031] The mounting groove 114 has internal threads on its sidewall, and the pressure ring 18 has external threads on its outer circumference. The pressure ring 18 is threadedly connected to the mounting groove 114. The upper outer wall of the lower housing 11 has external threads, and the upper cover 12 has internal threads. The upper cover 12 is also threadedly connected to the lower housing 11. Threaded connections facilitate later assembly and disassembly. In other embodiments, in addition to threaded connections, snap-fit ​​or bolt connections can also be used.

[0032] A third sealing ring 19 is also provided between the upper cover 12 and the lower housing 11.

[0033] The water inlet 112 is located in the middle of the lower housing 11, and the drain outlet 113 is located at the lower end of the lower housing 11.

[0034] Example 2:

[0035] See Figures 5 to 6 This application illustrates another embodiment of the present application: a liquid analysis system that can be applied to water quality detection and analysis in fields such as electrolytic cells and aquaculture ponds.

[0036] Specifically, it includes the backwash filter 1 of the above embodiment, an inlet pipe 2 connected to the inlet 112, an outlet pipe 3 connected to the outlet 121, and a drain pipe 4 connected to the drain outlet 113; the inlet pipe 2 is equipped with a water pump 5 and a first valve 6, which is located between the water pump 5 and the inlet 112 for selectively switching the pipe; the outlet pipe 3 is equipped with a solution analyzer 7, which is connected to a liquid collection container 9 through a second pipe 8, and the solution analyzer 7 is equipped with an internal pump; the outlet pipe 3 is equipped with a second valve 10 for selectively switching the pipe.

[0037] The liquid collection container 9 is equipped with a level gauge 101 for detecting whether the liquid in it is full. The liquid analysis system also includes a control module that is connected to the level gauge 101, the solution analyzer 7, the first valve 6 and the second valve 10. When the level gauge 101 detects that the liquid in the liquid collection container 9 is full, the control module controls the first valve 6 to close and the second valve 10 to open. The internal pump of the solution analyzer 7 reverses and returns the liquid in the liquid collection container 9 to the filter for backwashing.

[0038] The water inlet pipe 2 and the sewage outlet pipe 4 are connected to the same liquid tank 102.

[0039] Both the first valve 6 and the second valve 10 are solenoid valves.

[0040] The following is a brief description of the working process and usage method of a backwash filter according to the above embodiments:

[0041] See Figure 5 This describes the process of the solution entering the solution analyzer 7 through the filter. When the level gauge 101 detects that the solution in the liquid collection container 9 is at its lowest position, the solution analyzer 7 and related actuators enter the solution detection and analysis mode. The second valve 10 is closed, the first valve 6 is opened, the internal pump of the solution analyzer 7 switches to forward rotation, the water pump 5 operates, and the solution flows from the liquid pool 102 through the inlet pipe 2 into the backwash filter 1, passes through the filter screen 13, flows out from the outlet 121, and enters the solution analyzer 7 through the outlet pipe 3 for detection. The detected liquid flows into the liquid collection container 9 through the second pipe 8.

[0042] See Figure 6This describes the process of backwashing the filter. When the level gauge 101 detects that the liquid collection container 9 is full, it controls the solution analyzer 7 and related actuators to enter the filter backwashing mode. Specifically, the second valve 10 opens, the first valve 6 closes, the internal pump of the solution analyzer 7 switches to reverse, and the detected liquid flows into the solution analyzer 7 through the second pipe 8 and enters the outlet 121 of the backwash filter 1 through the outlet pipe 3. (See [reference]). Figure 4 The liquid is sprayed onto the filter screen 13 through the spray net 14 to achieve reverse rinsing, and the liquid flows back into the liquid pool 102 through the drain outlet 113 and the drain pipe 4.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A backwash filter, characterized in that: The device includes a main body with an inner cavity. The main body also has an inlet and an outlet communicating with the inner cavity. A filter screen and a spray screen are located between the inlet and outlet within the inner cavity. The spray screen is close to the outlet and has multiple spray holes. Liquid flowing back from the outlet is diverted into multiple streams through the spray holes of the spray screen and sprayed onto the filter screen for backwashing. The main body also has a drain outlet for discharging the backwashing liquid.

2. The backwash filter according to claim 1, characterized in that: A gasket is also provided between the filter screen and the spray screen.

3. A backwash filter according to claim 2, characterized in that: The main body includes a lower shell and an upper cover. The inner cavity is disposed in the lower shell. The upper end of the lower shell is provided with a mounting groove. The upper cover is detachably fixedly connected to the upper end of the lower shell and closes the mounting groove. The water outlet is disposed on the upper cover. The bottom of the mounting groove is connected to the inner cavity. A first sealing ring is provided at the bottom of the mounting groove. The filter screen is disposed above the first sealing ring. The gasket is disposed above the filter screen. A second sealing ring is disposed above the gasket. The spray screen is disposed above the second sealing ring. A pressure ring is also provided above the spray screen and fixedly connected to the mounting groove for pressing the spray screen.

4. A backwash filter according to claim 3, characterized in that: The mounting groove has an internal thread on its side wall, and the pressure ring has an external thread on its outer circumference. The pressure ring is threadedly connected to the mounting groove. The upper end of the lower housing has an external thread on its outer wall, and the upper cover has an internal thread. The upper cover and the lower housing are also threadedly connected.

5. A backwash filter according to claim 4, characterized in that: A third sealing ring is also provided between the upper cover and the lower shell.

6. A backwash filter according to claim 3, characterized in that: The water inlet is located in the middle of the lower shell, and the sewage outlet is located at the lower end of the lower shell.

7. A liquid analysis system, characterized in that: The backwash filter according to any one of claims 1-6 further includes an inlet pipe connected to the inlet, an outlet pipe connected to the outlet, and a drain pipe connected to the drain outlet; a water pump and a first valve are provided on the inlet pipe, the first valve being located between the water pump and the inlet for selectively switching the pipe; a solution analyzer is provided on the outlet pipe, the solution analyzer being connected to a liquid collection container via a second pipe, and an internal pump is provided inside the solution analyzer; a second valve for selectively switching the outlet pipe is provided on the outlet pipe.

8. A liquid analysis system according to claim 7, characterized in that: The liquid collection container is equipped with a level gauge for detecting whether the liquid in it is full. The liquid analysis system also includes a control module connected to the level gauge, the solution analyzer, the first valve, and the second valve. When the level gauge detects that the liquid collection container is full, the control module controls the first valve to close and the second valve to open. The internal pump of the solution analyzer reverses to return the liquid in the liquid collection container to the filter for backwashing.

9. A liquid analysis system according to claim 7, characterized in that: The inlet and outlet pipes are connected to the same liquid tank.

10. A liquid analysis system according to claim 7, characterized in that: Both the first valve and the second valve are solenoid valves.

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