An automatic dirt separator

Abstract

The application relates to the technical field of pipeline system decontamination equipment, in particular to an automatic decontamination device which comprises a shell, a filter assembly, a decontamination mechanism, an adjusting assembly and a control valve, the filter assembly comprises a plurality of filter cartridges, the filter cartridges are annularly distributed in the shell around the axis of the shell, the decontamination mechanism comprises a rotatable communication pipeline and a decontamination pipeline, the rotatable communication pipeline is arranged below the filter assembly, the adjusting assembly is used for driving the rotatable communication pipeline to rotate, so that the rotatable communication pipeline selectively communicates with the bottom of any one filter cartridge; one end of the rotatable communication pipeline is rotationally connected with the decontamination pipeline, the other end of the decontamination pipeline extends to the outside of the shell to form a decontamination opening, the decontamination opening is provided with the control valve, and the control valve is used for controlling the on-off of the decontamination pipeline. The application has the effect that the self-cleaning of the filter assembly can be completed without disassembling the filter assembly for filtering, and the filter assembly is prevented from being blocked.

Description

Technical Field

[0001] This application relates to the technical field of decontamination equipment for pipeline systems, and in particular to an automatic decontamination device. Background Technology

[0002] With the increasing demand for industrial and domestic water, water circulation pipeline systems are being used more and more widely, such as secondary water supply pipeline systems, heating pipelines and radiators, air conditioning room pipelines, and fan coil unit water circulation pipeline systems. The use of sludge separators can remove and filter impurities and dirt from the pipelines, maintaining the cleanliness of the water in the system, reducing resistance, protecting equipment, and preventing pipeline blockage. This is of great significance for ensuring the safe and stable operation of the system equipment, keeping water circulation unobstructed, and promptly removing air from the pipelines, thereby improving the overall system's operating efficiency and reliability.

[0003] In the past, ordinary strainers were commonly used to address pipe sludge removal issues. These strainers, used for sludge removal and venting in water circulation systems, primarily rely on filter components to remove impurities from the water. During water circulation, the filter components intercept large particles to ensure clean water quality. In secondary water supply systems, heating pipes and radiators, as well as air conditioning pipes and fan coil units, ordinary strainers are installed in the corresponding pipes. Through the filtration action of the filter components, they attempt to block impurities generated during transportation, installation, and operation of the pipes and equipment.

[0004] However, since it mainly relies on the filter components for filtration, the filter components will gradually become clogged as the machine operates, causing the machine to malfunction and directly affecting the water quality of the supply. The only solution is to disassemble and clean the filter components or replace them directly, which is time-consuming and labor-intensive. Summary of the Invention

[0005] To address the problem that impurities in water adhere to the filter components, gradually causing blockage and increasing water flow resistance, necessitating time-consuming and labor-intensive disassembly and cleaning of the filter components, this application aims to provide an automatic decontaminator, employing the following technical solution: Includes housing, filter assembly, drain mechanism, regulating assembly, and control valve; The filtration assembly includes multiple filter cartridges, which are arranged in a ring around the axis of the housing within the housing; The sewage discharge mechanism includes a rotatable connecting pipe and a sewage discharge pipe. The rotatable connecting pipe is located below the filter assembly. The adjusting assembly is used to drive the rotatable connecting pipe to rotate, so that the rotatable connecting pipe can selectively connect to the bottom of any filter cartridge. One end of the rotatable connecting pipe is rotatably connected to the sewage discharge pipe, and the other end of the sewage discharge pipe extends to the outside of the housing to form a sewage discharge port. The sewage outlet is equipped with a control valve, which is used to control the opening and closing of the sewage pipeline.

[0006] By adopting the above technical solution, when the control valve is opened, water flows backward from the outside of the filter cartridge into the inside of the filter cartridge and is discharged through the drain pipe, realizing backwashing of a single filter cartridge. This allows for drainage without stopping the machine, significantly improving the continuous operating efficiency of the filter. Simultaneously, by controlling the adjustment components, selective rinsing of the filter cartridges enhances the automation of the device, eliminating the need for manual disassembly and replacement of the filter components, reducing labor costs, and making the cleaning operation convenient and quick.

[0007] Optionally, the adjustment assembly includes a drive component and a drive shaft. The drive component is disposed on the top of the housing. One end of the drive shaft is connected to the output end of the drive component, and the other end of the drive shaft is fixedly connected to a rotatable connecting pipe.

[0008] By adopting the above technical solution, the transmission structure of the adjustment component is simple, reliable, and easy to maintain and replace. This design reduces the internal space occupied, improves driving efficiency, avoids water corrosion of the driving components, extends the service life of the equipment, and ensures the accuracy of rotational positioning.

[0009] Optionally, the rotatable connecting pipe includes a rotating pipe, one end of which is connected to the drive shaft, and the other end is rotatably connected to the sewage pipe through a rotating joint; the side wall of the rotating pipe is provided with an opening, and when the rotating pipe rotates, the opening can selectively connect to the outlet at the bottom of any filter cartridge through the pipe.

[0010] By adopting the above technical solution, selective communication with the bottom of the filter cartridge is achieved. Combined with the rotary joint, the sealing and smooth flow of the sewage discharge pipeline are ensured during rotation. This structure allows for precise alignment with the target filter cartridge for efficient backwashing, avoiding clogging or cross-contamination by impurities and improving the targeting and reliability of sewage discharge.

[0011] Optionally, the housing has two cavities, an upper cavity for filtering and a lower cavity for inlet. The filter assembly is located in the filter cavity, and the sewage discharge mechanism is located in the inlet cavity. A partition is provided between the inlet cavity and the filter cavity. The filter assembly is fixedly mounted on the partition, and a through hole is provided on the partition at the bottom of the filter assembly.

[0012] By adopting the above technical solution, the water flow path is optimized. The inlet chamber can pre-treat the fluid, while the filter chamber performs concentrated fine filtration, thereby improving the overall filtration efficiency and impurity removal rate. The through-hole design on the baffle ensures uniform water flow distribution, reduces uneven load on the filter cartridge, and enhances the stability and durability of the system.

[0013] Optionally, the side wall of the housing is provided with a water inlet, a water outlet and an inspection port. The water inlet is connected to the water inlet chamber and the water outlet is connected to the filter chamber. There are two inspection ports, which are connected to the water inlet chamber and the filter chamber respectively.

[0014] By adopting the above technical solution, equipment installation and maintenance become more convenient. The inspection ports correspond to the water inlet chamber and the filter chamber respectively, allowing workers to quickly clean or replace parts through the inspection ports, reducing downtime, improving the maintainability and ease of operation of the equipment, and making it suitable for complex industrial environments.

[0015] Optionally, a strong magnetic iron removal component is provided in the water inlet chamber, and the strong magnetic iron removal component is located near the maintenance port.

[0016] By employing the above technical solution, ferromagnetic impurities such as rust and metal particles in the fluid can be effectively adsorbed and removed, thereby protecting subsequent filtration components from wear and clogging. This design extends the service life of the filter cartridge and reduces maintenance costs, making it particularly suitable for applications with hard water or high iron content.

[0017] Optionally, the strong magnetic iron removal assembly includes at least two parallel and spaced strong magnetic bars, and the outer peripheral surface of the strong magnetic bars is uniformly distributed with raised adsorption portions.

[0018] By adopting the above technical solution, the magnetic adsorption area and contact efficiency are increased, thereby improving the impurity capture capability. The raised structure enhances the turbulence effect, making it easier for ferromagnetic particles to be adsorbed, improving the iron removal effect and overall filtration accuracy. At the same time, the structure is simple and easy to clean and replace.

[0019] Optionally, the outer surface of the strong magnetic rod is covered with a wear-resistant and corrosion-resistant layer, which is made of polytetrafluoroethylene or epoxy resin composite material.

[0020] By adopting the above technical solution, corrosion and wear are effectively prevented, ensuring the long-term stability of the strong magnetic components in harsh water environments. This coating reduces the risk of magnetic attenuation, maintains iron removal performance, and lowers replacement frequency and operating costs.

[0021] Optionally, the top of the housing is provided with an exhaust valve that communicates with the atmosphere, and the exhaust valve is controlled to open and close by a float switch.

[0022] By adopting the above technical solution, accumulated air in the cavity can be automatically removed, preventing airlock and ensuring smooth water flow and stable system pressure. This automatic venting design improves the reliability and safety of the filter, reduces manual intervention, and is suitable for fluid systems with large fluctuations.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. When the control valve is opened, water flows backward from the outside of the filter cartridge into the inside and is discharged through the drain pipe, achieving backwashing of individual filter cartridges. This allows for drainage without stopping the machine, significantly improving the continuous operating efficiency of the filter. Simultaneously, by adjusting the control components, selective flushing of the filter cartridges enhances the automation of the device. It eliminates the need for manual disassembly and replacement of the filter components, reducing labor costs, and making the cleaning operation convenient and quick. 2. The internal structure of the casing is rationally divided into independent inlet and filtration chambers, optimizing the water flow path and achieving graded treatment of impurities. The externally mounted drive components and the inclusion of inspection ports in the separate chambers make maintenance, cleaning, and replacement of core components exceptionally easy, significantly reducing equipment downtime. This structural design ensures the long-term stable operation of the separator in complex industrial environments and provides excellent maintainability. 3. The strong magnetic iron removal component added to the water inlet chamber can pre-adsorb and remove ferromagnetic impurities and small particles in the water, effectively reducing the load on the downstream filter cartridge and extending the service life of the filter components. The application of the automatic air vent valve can promptly remove accumulated air in the pipeline, preventing "air blockage" and ensuring stable pressure and unobstructed fluid flow throughout the entire water system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the dirt separator; Figure 2 This is a cross-sectional view of the dirt separator. In the picture, 1. Shell; 11. Filter chamber; 12. Water inlet chamber; 13. Water inlet; 14. Water outlet; 15. Inspection port; 2. Filter assembly; 21. Filter cartridge; 3. Sewage discharge mechanism; 31. Rotatable connecting pipe; 311. Rotating pipe; 312. Opening; 32. Sewage discharge pipe; 321. Sewage outlet; 33. Rotary joint. 4. Adjustment components; 41. Drive components; 42. Drive shaft. 5. Partition plate; 51. Through hole. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail below.

[0026] An automatic dirt remover, as described in the following text Figure 1The system includes a housing 1, a filter assembly 2, a drain mechanism 3, an adjustment assembly 4, and a control valve. The filter assembly 2 includes multiple filter cartridges 21, which are arranged in a ring around the axis of the housing 1 inside the housing 1. The drain mechanism 3 includes a rotatable connecting pipe 31 and a drain pipe 32. The rotatable connecting pipe 31 is located below the filter assembly 2. The adjustment assembly 4 drives the rotatable connecting pipe 31 to rotate, so that the rotatable connecting pipe 31 can selectively connect to the bottom of any filter cartridge 21. One end of the rotatable connecting pipe 31 is rotatably connected to the drain pipe 32, and the other end of the drain pipe 32 extends to the outside of the housing 1 to form a drain port 321. The drain port 321 is equipped with a control valve, which is used to determine the inlet and outlet pressure difference value through the set value in the control cabinet to control the opening and closing of the drain pipe 32.

[0027] Water flows from bottom to top through the filter assembly 2 for filtration. When the filter assembly 2 needs to be cleaned, water is poured into the filter assembly 2 from the top in reverse to wash away impurities on the inner wall of the filter assembly 2. The impurities are then discharged through the sewage discharge mechanism 3, achieving efficient decontamination and convenient sewage discharge. The filter assembly 2 at the top can perform preliminary treatment on the water flow, and the sewage discharge mechanism 3 at the bottom can discharge impurities in a timely manner.

[0028] Specifically, refer to Figure 2 The housing 1 has two cavities: an upper cavity (filter chamber 11) and a lower cavity (inlet chamber 12). A filter assembly 2 is disposed within the filter chamber 11, and a rotatable connecting pipe 31 of the drain mechanism 3 is disposed within the inlet chamber 12. A partition 5 is provided between the inlet chamber 12 and the filter chamber 11. The filter assembly 2 is fixedly mounted on the partition 5. A through hole 51 is provided on the partition 5 at the bottom of the filter assembly 2, allowing the internal space of the filter assembly 2 to communicate with the lower inlet chamber 12. The side wall of the housing 1 has an inlet 13, an outlet 14, and an inspection port 15. The inlet 13 communicates with the inlet chamber 12, and the outlet 14 communicates with the filter chamber 11. Two inspection ports 15 are provided, one communicating with the inlet chamber 12 and the other with the filter chamber 11.

[0029] This arrangement of the chambers and inlets / outlets makes the water flow direction more rational, facilitating water treatment and control. The lower inlet 13 connects to an external water pipe for water flow. Water flows into the inlet chamber 12 through inlet 13, gradually increasing in volume until it fills the entire chamber. The water then enters the filter assembly 2 through the through-hole 51 on the partition 5, passes through the filter assembly 2, and flows out into the filter chamber 11. The water continues to rise within the filter chamber 11 before finally flowing out from the outlet 14. The separation of the inlet chamber 12 and the filter chamber 11 allows the water to undergo different treatment steps in different chambers, improving the cleaning effect. The inspection port 15 facilitates subsequent inspection and maintenance of the internal equipment of the separator, extending its service life and reducing maintenance costs.

[0030] Furthermore, differential pressure transmitter interfaces are also provided at the inlet 13 and outlet 14. The differential pressure transmitter interfaces are connected to the differential pressure detection mechanism, which can detect the pressure difference between the inside and outside of the inlet 13 and outlet 14, thereby providing a signal to adjust the flow rate and flow rate of the inlet 13 and outlet 14, preventing excessive pressure difference from damaging the internal parts of the device and reducing the water removal effect.

[0031] Furthermore, refer to Figure 2 The filter assembly 2 includes multiple filter cartridges 21, which are arranged in a ring around the axis of the housing 1. The filter cartridges 21 are generally made of metal, such as stainless steel, which has good corrosion resistance and strength. The shape of the filter cartridges 21 is usually cylindrical, which increases the filtration area and improves filtration efficiency. Of course, the filter cartridges 21 can also be other shapes, such as square. The ring arrangement of multiple filter cartridges 21 allows water to flow evenly through each cartridge, improving the overall filtration effect. Steel pipe columns are installed between adjacent filter cartridges 21 to strengthen the connection between them and prevent excessive water flow from damaging the cartridges. The filter cartridges 21 are fixed to a partition plate 5, which is located between the filtration chamber 11 and the inlet chamber 12 within the housing 1. A through hole 51 is provided on the partition plate 5 at the bottom of the filter assembly 2, allowing water to smoothly enter the filter cartridges 21 for filtration.

[0032] Furthermore, refer to Figure 2 The adjusting component 4 drives the rotatable connecting pipe 31 to rotate, selectively connecting to the bottom of any filter cartridge 21. The adjusting component 4 includes a driving element 41 and a driving shaft 42. The driving element 41 is located on the top of the outer shell 1 and is generally a motor, which has stable driving force and is easy to control. Of course, other driving devices such as hydraulic motors can also be used. One end of the driving shaft 42 is connected to the output end of the driving element 41, and the other end passes through the filter chamber 11 and is fixedly connected to the rotatable connecting pipe 31 through a flange. A sealing gasket is provided between the flanges to strengthen the sealing connection between the pipes and prevent water from overflowing. Since the driving shaft 42 passes through the pressure plate, a sealed rotational connection is required between it and the pressure plate. The driving shaft 42 is usually made of metal, such as carbon steel, which has sufficient strength to transmit driving force.

[0033] Furthermore, the drive component 41 in the adjustment assembly 4 can be a hydraulic motor. Hydraulic motors have the characteristics of high torque and wide speed range, making them suitable for applications requiring high driving force. The hydraulic motor is connected to the drive shaft 42, which can also drive the rotatable connecting pipe 31 to rotate, achieving selective communication with the bottom of the filter cartridge 21.

[0034] Using a hydraulic motor as the drive component 41 provides greater driving force, making the rotation of the rotatable connecting pipe 31 more stable and reliable. In some operating conditions requiring high driving force, the advantages of a hydraulic motor are even more pronounced, further improving the working efficiency and stability of the separator. Compared to electric motor drives, it offers better adaptability and practicality in specific applications.

[0035] Furthermore, refer to Figure 2 The sewage discharge mechanism 3 includes a rotatable connecting pipe 31 and a sewage discharge pipe 32. The rotatable connecting pipe 31 includes a rotating pipe 311, one end of which is connected to the drive shaft 42, and the other end is rotatably connected to the sewage discharge pipe 32 via a sealed rotary joint 33. The rotating pipe 311 has an opening 312 on its side wall, which connects to the bottom of the filter cartridge 21 via a pipe. When the motor drives the drive shaft 42 to rotate, thereby causing the rotating pipe 311 to rotate, the pipe on the opening 312 side can selectively connect to the through hole 51 at the bottom of any filter cartridge 21. The rotating pipe 311 is generally made of metal and is tubular in shape to facilitate water flow. The rotary joint 33 ensures the connectivity between the rotating pipe 311 and the sewage discharge pipe 32 during rotation. One end of the rotatable connecting pipe 31 and the sewage discharge pipe 32 is rotatably connected via the rotary joint 33, and the other end of the sewage discharge pipe 32 extends outside the housing 1 to form a sewage outlet 321. Sewage pipes 32 are typically made of corrosion-resistant materials, such as PVC pipes, to prevent them from being corroded by sewage.

[0036] Furthermore, a control valve is installed at the drain outlet 321. This control valve controls the opening and closing of the drain pipe 32. When the control valve is open, water flows backward from the outside of the filter cartridge 21 into the inside of the filter cartridge 21 and is discharged through the drain pipe 32. The control valve can be an electric valve, which facilitates remote control and automated operation. Alternatively, a manual valve can be used in situations where a high degree of automation is not required.

[0037] During filtration, among the multiple filter cartridges 21, those connected to the outlet of the rotating tube 311 do not filter water. When the differential pressure detection mechanism at the inlet 13 detects excessive water pressure, it indicates that there is too much contamination and blockage in one filter cartridge 21. At this time, the motor drives the drive rod, rotating the rotating tube 311 to connect with the through hole 51 below the filter cartridge 21 that needs cleaning. The control valve of the drain port 321 is opened. Since the drain pipe 32 is connected to the outside, water in the filter chamber 11 flows from the filter cartridge 21 connected to the rotating tube 311 into the drain pipe 32. This creates a backwashing action, flushing the impurities on the inner wall of the filter cartridge 21 into the drain pipe 32, thus cleaning the filter cartridge 21. The above operation is repeated to clean each filter cartridge 21 one by one, allowing for drainage without stopping the machine, significantly improving the continuous operating efficiency of the filter. Meanwhile, by adjusting the control of component 4, the filter cartridge 21 can be selectively rinsed, which also improves the automation level of the device. There is no need to manually disassemble and replace the filter component 2, reducing labor costs, and the cleaning operation is convenient and quick.

[0038] Furthermore, a strong magnetic iron removal assembly is installed inside the water inlet chamber 12, and is located near the inspection port 15. The strong magnetic iron removal assembly includes at least two parallel and spaced strong magnetic rods, with raised adsorption parts evenly distributed on the outer circumferential surface of the strong magnetic rods. The outer surface of the strong magnetic rods is covered with a wear-resistant and corrosion-resistant layer, which is made of polytetrafluoroethylene or epoxy resin composite material.

[0039] The strong magnetic separator effectively adsorbs fine iron particles in the water, preventing them from entering the filter and damaging the equipment. The raised adsorption section increases the adsorption area of ​​the magnetic rod, improving the adsorption effect. The wear-resistant and corrosion-resistant layer protects the magnetic rod, extending its service life, reducing replacement frequency, and lowering operating costs. Its proximity to the inspection port 15 facilitates the replacement and maintenance of the strong magnetic separator.

[0040] The top of the housing 1 is equipped with an exhaust valve that communicates with the atmosphere, and the exhaust valve is controlled to open and close by a float switch.

[0041] The vent valve allows for timely discharge of gas from housing 1, ensuring the normal operation of the strainer. The float switch control is simple and reliable: when gas levels increase in housing 1, the float rises, opening the vent valve to release the gas; after the gas is released, the float descends, closing the vent valve. This automatic venting function improves the safety and stability of the strainer, preventing malfunctions caused by gas accumulation.

[0042] The implementation principle of this embodiment is as follows: Water enters through inlet 13, first passing through a strong magnetic separator to adsorb fine particles, then through filter cartridge 21 to filter larger particles. Impurities adhere to filter cartridge 21 after filtration. As operation progresses, filter cartridge 21 gradually becomes clogged, causing the machine to malfunction. At this point, adjustment component 4 selects the filter cartridge 21 that needs cleaning. Simultaneously, an electric valve is connected to the drain outlet 321, which can be controlled to achieve water flow counter-current rinsing. Because there is working pressure during water inflow, water can only enter in the opposite direction after drain outlet 321 is opened, forming a backflow for backwashing until the pressure difference disappears, indicating the filter screen is clean and the rinsing process is complete. Alternatively, a timer can be set for filter screen cleaning; no manual intervention is required, and the rinsing is fully automatic.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic dirt remover, characterized in that, It includes a housing (1), a filter assembly (2), a sewage discharge mechanism (3), an adjustment assembly (4), and a control valve; The filter assembly (2) includes a plurality of filter cartridges (21), which are arranged in a ring around the axis of the housing (1) inside the housing (1); The sewage discharge mechanism (3) includes a rotatable connecting pipe (31) and a sewage discharge pipe (32). The rotatable connecting pipe (31) is located below the filter assembly (2). The adjusting assembly (4) is used to drive the rotatable connecting pipe (31) to rotate, so that the rotatable connecting pipe (31) can selectively connect to the bottom of any filter cartridge (21). One end of the rotatable connecting pipe (31) is rotatably connected to the sewage discharge pipe (32), and the other end of the sewage discharge pipe (32) extends to the outside of the housing (1) to form a sewage discharge port (321). The drain outlet (321) is equipped with a control valve, which is used to control the opening and closing of the drain pipe (32).

2. The automatic dirt remover according to claim 1, characterized in that, The adjustment component (4) includes a drive element (41) and a drive shaft (42). The drive element (41) is located on the top of the outer shell (1). One end of the drive shaft (42) is connected to the output end of the drive element (41), and the other end of the drive shaft (42) is fixedly connected to a rotatable connecting pipe (31).

3. An automatic decontaminator according to claim 2, characterized in that, The rotatable connecting pipe (31) includes a rotating pipe (311), one end of which is connected to the drive shaft (42), and the other end is rotatably connected to the sewage pipe (32) through a rotating joint (33); the side wall of the rotating pipe (311) is provided with an opening (312), and when the rotating pipe (311) rotates, the opening (312) can selectively connect to the outlet at the bottom of any filter cartridge (21) through a pipe.

4. An automatic dirt remover according to claim 1, characterized in that, The housing (1) has two cavities, an upper cavity (11) and a lower cavity (12). The filter assembly (2) is located in the filter cavity (11), and the sewage discharge mechanism (3) is located in the water inlet cavity (12). A partition (5) is provided between the water inlet cavity (12) and the filter cavity (11). The filter assembly (2) is fixedly mounted on the partition (5). A through hole (51) is provided on the partition (5) at the bottom of the filter assembly (2).

5. An automatic dirt remover according to claim 4, characterized in that, The side wall of the housing (1) is provided with an inlet (13), an outlet (14) and an inspection port (15). The inlet (13) is connected to the inlet chamber (12), and the outlet (14) is connected to the filter chamber (11). There are two inspection ports (15), which are connected to the inlet chamber (12) and the filter chamber (11) respectively.

6. An automatic dirt remover according to claim 5, characterized in that, The water inlet chamber (12) is equipped with a strong magnetic iron removal component, which is located near the inspection port (15).

7. An automatic dirt remover according to claim 6, characterized in that, The strong magnetic iron removal assembly includes at least two parallel and spaced strong magnetic bars, and the outer peripheral surface of the strong magnetic bars is uniformly distributed with raised adsorption parts.

8. An automatic decontaminator according to claim 7, characterized in that, The outer surface of the strong magnetic rod is covered with a wear-resistant and corrosion-resistant layer, which is made of polytetrafluoroethylene or epoxy resin composite material.

9. An automatic dirt remover according to claim 1, characterized in that, The top of the housing (1) is provided with an exhaust valve that communicates with the atmosphere, and the exhaust valve is controlled to open and close by a float switch.

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