An oil-free system liquid supply line filtering device

Abstract

The utility model provides a kind of oil-free system liquid supply pipeline filtering device, including tee joint, valve assembly, pipeline assembly and permanent magnet adsorption component, tee joint is set to condenser outlet, pipeline assembly is connected with tee joint, valve assembly is set between tee joint and pipeline assembly, permanent magnet adsorption component includes permanent magnet, and permanent magnet is set to the inside of pipeline assembly.The device can actively adsorb iron filings in oil-free refrigeration system, and can be cleaned regularly, to avoid the maintenance cost caused by replacing filter or filter element in filtering device.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, and specifically relates to a filtration device for an oil-free system liquid supply pipeline. Background Technology

[0002] With continuous advancements in industrial technology, the market size of magnetic levitation centrifugal compressors in my country is experiencing rapid growth. Simultaneously, the high efficiency and energy saving of magnetic levitation centrifugal compressors help enhance the competitiveness of my country's compressor industry and meet increasingly stringent environmental protection requirements. To ensure the reliability and stability of magnetic levitation compressors, we typically add a filtration device to the refrigeration system to remove iron filings and impurities, preventing mechanical damage to the compressor.

[0003] The existing filtration devices in the refrigeration system can only passively filter out most iron filings and impurities. However, as the unit operates, some iron filings and impurities inevitably enter the compressor after the filtration devices, causing mechanical wear over a long period of time. Moreover, to ensure the normal operation of the filtration devices, the unit's filters or filter elements need to be replaced regularly, increasing the unit's operating costs. Utility Model Content

[0004] In order to solve the above-mentioned problems in the prior art, this application provides an oil-free system liquid supply pipeline filtration device to solve the above-mentioned technical defects.

[0005] According to a first aspect of this utility model, a filtration device for an oil-free system's liquid supply pipeline is proposed, comprising: a tee connector, a valve assembly, a pipeline assembly, and a permanent magnet adsorption assembly. The tee connector is disposed at the condenser outlet, the pipeline assembly is connected to the tee connector, the valve assembly is disposed between the tee connector and the pipeline assembly, and the permanent magnet adsorption assembly includes a permanent magnet disposed inside the pipeline assembly. In this structural configuration, the two outlets of the tee connector divide the fluid flowing out of the condenser into two directions: one direction flows normally to the economizer, and the other direction flows to the filtration device. The filtration device mainly uses the permanent magnet adsorption assembly within the pipeline assembly to adsorb waste debris contained in the fluid flowing within the flow channel.

[0006] In a specific embodiment, the permanent magnet includes multiple spaced-apart column structures. This structural arrangement not only increases the adsorption area but also creates an axial vortex effect when fluid passes through the adsorption region, thus prolonging the time the iron filings are exposed to the magnetic field.

[0007] In a specific embodiment, the column structure has a spirally arranged perforated structure. This structure not only increases the adsorption area of ​​the permanent magnet adsorption component but also prevents iron filings from detaching from the permanent magnet adsorption component.

[0008] In a specific embodiment, the permanent magnet adsorption assembly also includes a base, which is also provided with a double helical perforated structure to match the helical perforated structure on the column structure. In this structural design, the base also serves to increase the adsorption area of ​​the permanent magnet adsorption assembly while preventing iron filings from detaching from the permanent magnet adsorption assembly.

[0009] In a specific embodiment, the double-helix perforated structure in the base includes a first helix perforated structure and a second helix perforated structure arranged coaxially. The first helix perforated structure is a cylindrical helix, and the second helix perforated structure is a conical helix. In this structural arrangement, the first and second helix perforated structures are coaxially nested, allowing for the compact integration of a two-stage filtration structure within a limited space, thus maximizing the utilization of structural space. The first helix perforated structure provides stable swirling flow, while the second helix perforated structure regulates turbulence, physically guiding iron filings and impurities to the strong magnetic field region. Furthermore, the conical helix structure corresponding to the second helix perforated structure exhibits a contracting trend, which enhances the centrifugal adsorption force on iron filings and impurities.

[0010] In a specific embodiment, the pore size of the first helical pore structure is larger than that of the second helical pore structure. This structural arrangement enables a graded filtration function: the larger pore size of the first helical pore structure preferentially adsorbs larger iron filings, while the smaller pore size of the second helical pore structure adsorbs smaller iron filings. Furthermore, the helical arrangement of the pores and the change in pore size gradient agitate the fluid, prolonging the exposure time of iron filings in the strong magnetic region, which helps improve adsorption efficiency.

[0011] In a specific embodiment, the piping assembly and the condenser outlet are arranged in the same direction. This structural arrangement allows iron filings in the refrigerant fluid to settle to the permanent magnet adsorption assembly at the bottom under gravity, significantly improving the adsorption efficiency of the iron filings.

[0012] In a specific embodiment, the piping assembly includes a seamless pipe, which is detachably connected to a tee fitting via a flange. This structural design allows the tee fitting to be fixedly connected to the seamless pipe, and enables quick disassembly of the seamless pipe by loosening the flange when maintenance of the filter device is required.

[0013] In a specific embodiment, the pipeline assembly further includes a cap, and the permanent magnet is welded into the seamless pipe; the base is welded into the cap. This structural design secures both the permanent magnet and the base within the bottom pipeline assembly, preventing them from detaching or loosening during filter operation, which could affect the adsorption effect of the filter.

[0014] In specific embodiments, the valve assembly includes a butterfly valve, a ball valve, or a plug valve. In this configuration, the butterfly valve has advantages such as compact structure, low flow resistance, fast opening and closing speed, and good sealing performance, making it suitable for high-flow-rate systems and media containing impurities. The ball valve has advantages such as good sealing performance, low flow resistance, and fast opening and closing speed, but it occupies a larger installation space and is suitable for high-pressure, high-sealing-performance scenarios. The plug valve has a compact structure, is suitable for fluids containing iron filings, and has a fast opening and closing speed, but it is prone to wear after long-term use, and its sealing performance is lower under high pressure, making it suitable for low-pressure, small-diameter pipelines containing impurities.

[0015] Compared with the prior art, the beneficial results of this utility model are as follows:

[0016] 1. It can actively adsorb iron filings left over from processing in oil-free refrigeration systems, and can gradually clean the residual iron filings in the refrigeration system through a periodically cleanable and removable filter device.

[0017] Second, the detachable filter can be cleaned and reused, reducing the maintenance costs of regularly replacing traditional filter devices. Attached Figure Description

[0018] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0019] Figure 1 This is a schematic diagram of the structure of the oil-free system liquid supply pipeline filtration device according to the first embodiment of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the oil-free system liquid supply pipeline filtration device according to the first embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the permanent magnet adsorption assembly according to the first embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of a permanent magnet adsorption component according to the first embodiment of the present invention;

[0023] Figure 5 This is a top view of the permanent magnet adsorption assembly according to the first embodiment of the present invention;

[0024] Figure 6 This is a top view of the permanent magnet adsorption component base according to the first embodiment of the present utility model;

[0025] Figure 7a This is a schematic diagram of the first spiral hole structure according to the first embodiment of the present invention;

[0026] Figure 7b This is a schematic diagram of the second spiral hole structure according to the first embodiment of the present invention;

[0027] Figure 7c This is a schematic diagram of the double helix hole structure according to the first embodiment of the present invention.

[0028] The meanings of the numbers in the diagram are as follows: 01-Tee connector, 02-Tee connector flange, 03-Butterfly valve, 04-Butterfly valve flange, 05-Seamless intermediate pipe, 06-Seamless pipe flange, 07-Permanent magnet adsorption component flange, 08-Permanent magnet adsorption component seamless pipe, 09-Permanent magnet, 10-Permanent magnet adsorption component base, 11-Permanent magnet adsorption component bolt assembly, 12-Butterfly valve bolt assembly, 13-Seamless pipe cap, 14-Hole structure, 15-First spiral hole structure, 16-Second spiral hole structure, 17-Double spiral hole structure. Detailed Implementation

[0029] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0030] This invention proposes a filtration device for the liquid supply pipeline of an oil-free system. Figure 1 This diagram shows a structural schematic of the oil-free system liquid supply pipeline filtration device according to the first embodiment of the present invention. Figure 2 A cross-sectional schematic diagram of the oil-free system supply pipeline filtration device according to the first embodiment of this utility model is shown. Figure 1 and Figure 2As shown, an oil-free liquid supply pipeline filtration device includes a three-way connector 01, a butterfly valve 03, a pipeline assembly, and a permanent magnet adsorption assembly. The three-way connector 01 is located at the liquid outlet of the condenser and has two outlets. The pipeline assembly is connected to one of the outlets. The butterfly valve 03 is located between the three-way connector 01 and the pipeline assembly. The permanent magnet adsorption assembly includes a permanent magnet 09, which is disposed inside the pipeline assembly. In this structural arrangement, the two outlets of the three-way connector 01 divide the fluid flowing out of the condenser into two directions: one direction flows normally to the economizer, and the other direction flows to the filtration device. The permanent magnet adsorption assembly within the pipeline assembly primarily adsorbs waste debris contained in the fluid flowing within the flow channel.

[0031] In a specific embodiment, the piping assembly and the condenser outlet are arranged in the same direction. This structural arrangement allows iron filings in the refrigerant fluid to settle to the permanent magnet adsorption assembly at the bottom under gravity, significantly improving the adsorption efficiency of the iron filings.

[0032] In a specific embodiment, the piping assembly includes a seamless intermediate pipe 05 and a seamless permanent magnet adsorption component pipe 08, which are sequentially disposed between the tee joint 01 and the seamless pipe cap 13, and are detachably connected via a first flange and a second flange, respectively. This structural arrangement securely connects the tee joint 01 to the seamless intermediate pipe 05 and the seamless permanent magnet adsorption component pipe 08, and allows for quick disassembly of the seamless permanent magnet adsorption component pipe 08 by loosening the second flange when maintenance is required. Furthermore, the seamless intermediate pipe 05 forms a flexible section, which can absorb the impact on the filter device during compressor start-up and shutdown, reducing stress fluctuations at the first and second flanges.

[0033] In a specific embodiment, the first flange includes a tee joint flange 02 and a butterfly valve flange 04; the second flange includes a seamless pipe flange 06 and a permanent magnet adsorption component flange 07. The tee joint flange 02, butterfly valve flange 04, seamless pipe flange 06, and permanent magnet adsorption component flange 07 are respectively welded to the bottom end of the tee joint 01, the top end of the intermediate seamless pipe 05, the bottom end of the intermediate seamless pipe 05, and the top end of the permanent magnet adsorption component seamless pipe 08. Furthermore, the tee joint flange 02 and the butterfly valve flange 04 are fixedly connected by multiple butterfly valve bolt assemblies 12; the seamless pipe flange 06 and the permanent magnet adsorption component flange 07 are fixedly connected by multiple permanent magnet adsorption component bolt assemblies 11. In this structural design, the tee connector 01 is fixedly connected to the intermediate seamless pipe 05, and the intermediate seamless pipe 05 is fixedly connected to the permanent magnet adsorption component seamless pipe 08 via flanges. This facilitates quick assembly and disassembly, allowing for rapid disassembly and assembly of the pipeline by loosening the bolts. When cleaning the permanent magnet adsorption component, only the butterfly valve 03 needs to be closed and the flange disassembled, eliminating the need for cutting or welding the pipeline and significantly reducing downtime. Furthermore, the flange combined with the sealing gasket effectively prevents refrigerant leakage, making it particularly suitable for high-pressure and low-temperature conditions in oil-free systems.

[0034] In a specific embodiment, the pipeline assembly further includes a seamless pipe cap 13, and the permanent magnet 09 is welded into the seamless pipe 08 of the permanent magnet adsorption assembly; the permanent magnet adsorption assembly also includes a permanent magnet adsorption assembly base 10, which is welded into the seamless pipe cap 13. This structural arrangement secures both the permanent magnet 09 and the permanent magnet adsorption assembly base 10 within the bottom pipeline assembly, preventing them from falling off or loosening during filter operation, thus affecting the adsorption effect of the filter.

[0035] In a specific embodiment, when the unit is running, butterfly valve 03 is in the open state. When the fluid from the condenser outlet flows through the tee connector 01, the permanent magnet 09 and the permanent magnet adsorption component base 10 adsorb residual iron filings in the fluid. After the unit has been running for a period of time, butterfly valve 03 can be closed, the permanent magnet adsorption component bolt assembly 11 can be disassembled, and the iron filings in the permanent magnet 09 and the permanent magnet adsorption component base 10 can be cleaned. After cleaning, the permanent magnet 09 and the permanent magnet adsorption component base 10 can be reinstalled into the filter device. In this structural configuration, butterfly valve 03 controls the flow of fluid by rotating the valve plate. When the unit is running, it remains fully open to ensure that the fluid from the condenser outlet is smoothly diverted to the permanent magnet adsorption area, maximizing the iron filings adsorption efficiency. When the unit is being maintained, it remains closed. After closing butterfly valve 03, the fluid flowing to the permanent magnet adsorption component can be completely cut off, isolating this section of the pipeline and preventing refrigerant leakage or system pressure fluctuations during maintenance, thus ensuring operational safety.

[0036] In specific embodiments, in addition to butterfly valve 03, ball valves or plug valves can also be used depending on the scenario. Butterfly valve 03 has the advantages of compact structure, low flow resistance, fast opening and closing speed and good sealing performance, and is suitable for high flow rate systems and media containing impurities; ball valve has the advantages of good sealing performance, low flow resistance and fast opening and closing speed, but occupies more installation space and is suitable for high pressure and high sealing performance scenarios; plug valve has the characteristics of compact structure, is suitable for fluids containing iron filings and has a fast opening and closing speed, but is prone to wear after long-term use and has lower sealing performance under high pressure, and is suitable for low pressure and small diameter pipelines containing impurities.

[0037] Figure 3 This is a structural schematic diagram of the permanent magnet adsorption assembly according to the first embodiment of the present invention. Figure 4 This is a cross-sectional schematic diagram of the permanent magnet adsorption assembly according to the first embodiment of this utility model. Figure 3 and Figure 4 As shown, the permanent magnet adsorption component includes a permanent magnet 09, which comprises six spaced-apart columnar structures, each with a spirally arranged perforated structure 14. In this structural arrangement, the six spaced-apart columnar structures significantly increase the adsorption area, resulting in a wider magnetic field coverage and enhanced capture capability for dispersed iron filings. The spirally arranged perforated structure 14 further expands the effective adsorption area, especially by creating localized turbulence when fluid flows through, extending the residence time of iron filings under the magnetic field, improving adsorption efficiency, and preventing iron filings from detaching.

[0038] In a specific embodiment, the material of the permanent magnet 09 can be replaced with a material that generates a strong magnetic force when energized. The frequency and duration of energization can then be controlled by the centrifuge unit's control system to periodically clean residual iron filings from the system. In this structural setup, the strength of the magnetic field can be flexibly adjusted by controlling the switching and intensity of the current. During unit operation, a strong magnetic field is activated to efficiently attract iron filings; during cleaning, the current is turned off to demagnetize, making the iron filings easier to detach. Cleaning can be performed without disassembling the device, significantly simplifying the maintenance process.

[0039] Figure 5 A top view of the permanent magnet adsorption assembly according to the first embodiment of this utility model is shown. Figure 5 As shown, the permanent magnet adsorption component base 10 is also provided with a double helical hole structure, which works in conjunction with the helical hole structure on the column structure. In this structural design, the permanent magnet adsorption component base 10 also serves to increase the adsorption area of ​​the permanent magnet adsorption component and prevent iron filings from detaching from the permanent magnet adsorption component.

[0040] In specific embodiments, besides the double-helix perforated structure, an alternating arrangement of protruding columns inside the main body can also be used, maximizing the magnetic force at the bottom of the structure. This structural design effectively prevents iron filings from detaching by addressing both the adsorption force and the structural integrity, significantly improving the reliability and durability of iron filings adsorption under complex operating conditions. It is particularly suitable for oil-free refrigeration systems with high requirements for system stability and maintenance costs. However, the impact of increased flow resistance and manufacturing costs must be weighed, and the column layout can be optimized through fluid simulation if necessary.

[0041] Figure 6 A top view of the permanent magnet adsorption assembly base according to the first embodiment of this utility model is shown. Figure 2 and Figure 6 As shown, the double-helix porous structure 17 in the permanent magnet adsorption component base 10 includes a first helix porous structure 15 and a second helix porous structure 16, with the pore size of the first helix porous structure 15 being larger than that of the second helix porous structure 16. This structure enables a graded filtration function: the larger pore size of the first helix porous structure 15 preferentially adsorbs larger iron filings, while the smaller pore size of the second helix porous structure 16 is responsible for adsorbing smaller iron filings. Furthermore, the helical arrangement of the porous structure and the gradient change in pore size can disturb the fluid, prolonging the exposure time of iron filings in the strong magnetic region, which is beneficial for improving adsorption efficiency.

[0042] Figure 7a Figure 7b The diagrams show schematic representations of the first spiral hole structure and the second spiral hole structure in the permanent magnet adsorption assembly base of one embodiment of this invention. Figure 7a and Figure 7b As shown, the first helical hole structure 15 is a cylindrical helical structure, and the second helical hole structure 16 is a conical helical structure. The first helical hole structure 15 provides stable swirling flow, while the second helical hole structure 16 regulates turbulence and physically guides iron filings and impurities to the strong magnetic field region. Furthermore, the conical helical structure corresponding to the second helical hole structure 16 exhibits a contracting trend, which is beneficial for enhancing the centrifugal adsorption force on the iron filings and impurities.

[0043] Figure 7c A schematic diagram of the double-helix perforated structure in the permanent magnet adsorption assembly base of one embodiment of this utility model is shown. Figure 7c As shown, the first helical pore structure 15 and the second helical pore structure 16 are coaxially arranged to jointly form a double helical pore structure 17. In this structural arrangement, the first helical pore structure 15 and the second helical pore structure 16 are coaxially nested, which allows for the compact integration of two-stage filtration structures within a limited space, thus maximizing the utilization of structural space.

[0044] Obviously, those skilled in the art can make various modifications and changes to the embodiments of this utility model without departing from the spirit and scope of this utility model. In this way, this utility model is also intended to cover such modifications and changes if they fall within the scope of the claims of this utility model and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A filtration device for an oil-free system's liquid supply pipeline, characterized in that, include: The system comprises a tee connector, a valve assembly, a piping assembly, and a permanent magnet adsorption assembly. The tee connector is located at the liquid outlet of the condenser. The piping assembly is connected to the tee connector. The valve assembly is located between the tee connector and the piping assembly. The permanent magnet adsorption assembly includes a permanent magnet, which is disposed inside the piping assembly.

2. The oil-free system liquid supply pipeline filtration device according to claim 1, characterized in that, The permanent magnet comprises multiple columnar structures spaced apart.

3. The oil-free system liquid supply pipeline filtration device according to claim 2, characterized in that, The columnar structure has a spirally arranged perforated structure.

4. The oil-free system liquid supply pipeline filtration device according to claim 3, characterized in that, The permanent magnet adsorption assembly also includes a base, which has a double helical hole structure that matches the helical hole structure on the column structure.

5. The oil-free system liquid supply pipeline filtration device according to claim 4, characterized in that, The double helical hole structure in the base includes a first helical hole structure and a second helical hole structure arranged coaxially, wherein the first helical hole structure is a cylindrical helical structure and the second helical hole structure is a conical helical structure.

6. The oil-free system liquid supply pipeline filtration device according to claim 5, characterized in that, The diameter of the first spiral hole structure is larger than the diameter of the second spiral hole structure.

7. The oil-free system liquid supply pipeline filtration device according to claim 4, characterized in that, The piping assembly is arranged in the same direction as the liquid outlet of the condenser.

8. The oil-free system liquid supply pipeline filtration device according to claim 7, characterized in that, The piping assembly includes a seamless pipe, which is detachably connected to the tee fitting via a flange.

9. A filter device for an oil-free system liquid supply pipeline according to claim 8, characterized in that, The pipeline assembly also includes a pipe cap, and the permanent magnet is welded into the seamless pipe; the base is welded into the pipe cap.

10. The oil-free system liquid supply pipeline filtration device according to claim 1, characterized in that, The valve assembly includes a butterfly valve, a ball valve, or a plug valve.

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