Two-stage filter

Abstract

According to the two-stage filter provided by the utility model, the elastic pipe section and the matched first linear driver are arranged on the first filtering mechanism, and the internal pressure of the first shell is changed by utilizing the telescopic action of the elastic pipe section and the matched first linear driver, so that a two-way dynamic filtering mechanism is formed; the filter screen can be reversely filtered to remove blocked impurities and maintain the filter screen to be transparent, and forward pressure can be applied to the filter element of the second filter mechanism, so that the problem of flow resistance superposition of traditional two-stage filtration is solved, and the filter efficiency of the filter element is improved; when the elastic pipe section ascends, the pressure intensity in the first shell is reduced, the filtering efficiency of the filter screen is improved, meanwhile, the reverse suction reverse filtering effect is formed on the filter element, and impurities on the surface of the filter element are further removed. According to the structural design, through dynamic adjustment of the pressure intensity, alternate reverse filtering cleaning and efficiency optimization of the two-stage filtering element are achieved, and the problem that the efficiency is reduced due to flow resistance superposition in two-stage filtering is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a two-stage filter. Background Technology

[0002] A two-stage filter is a filtration device with a two-stage filtration structure, typically used for high-precision filtration of fluids. A two-stage filter generally consists of a housing, two filter elements, and inlet / outlet pipe interfaces. Different types and precision filter elements can be selected depending on the specific filtration requirements. However, setting up two or more stages of filtration can lead to increased flow resistance, affecting filtration efficiency and causing it to slow down. Therefore, a filtration device is needed that can improve filtration efficiency while achieving two-stage filtration. Utility Model Content

[0003] The purpose of this invention is to provide a two-stage filter that can improve filtration efficiency to a certain extent while achieving two-stage filtration.

[0004] This utility model provides a two-stage filter, including a base. The top of the base has a first filter mechanism and a second filter mechanism connected to each other from top to bottom. The first filter mechanism includes a first housing and a filter screen disposed inside the first housing. The top of the first housing has an inlet corresponding to the filter screen. The first housing has an elastic tube segment. A first linear actuator for driving the elastic tube segment to extend and retract is fixedly installed on the outside of the first housing. The second filter mechanism includes a second housing. The top of the second housing has a plurality of through holes arranged circumferentially along the filter screen. A filter element is installed in the second housing corresponding to each of the through holes. The bottom of the side of the second housing has an outlet.

[0005] Furthermore, the feed inlet is connected to a feed pump via a connecting hose, and the feed pump is fixedly installed on the top of the base.

[0006] Furthermore, a limiting ring that mates with the filter screen is fixedly installed inside the first housing.

[0007] Furthermore, the second filtration mechanism also includes a sealing seat, which is sealed and installed at the bottom end of the second housing, and the top end of the sealing seat is provided with a plurality of locking blocks corresponding to the filter element.

[0008] Furthermore, a first connecting ring is provided on the outer side of the first housing above the elastic tube segment, and a second connecting ring is provided at the top of the side of the second housing. The two ends of the first linear actuator are fixedly connected to the first connecting ring and the second connecting ring, respectively.

[0009] Furthermore, a second linear driver is connected and installed between the second connecting ring and the top of the base.

[0010] Furthermore, both the first linear actuator and the second linear actuator are cylinders or electric telescopic rods.

[0011] Furthermore, the elastic pipe section is a corrugated pipe.

[0012] Furthermore, the bottom end of the first housing is connected to the top end of the second housing by a thread.

[0013] Furthermore, the one-way valve is mounted on the connecting hose.

[0014] The technical solution of this utility model involves setting an elastic tube segment and a matching first linear actuator in the first filtration mechanism. The extension and retraction of the elastic tube segment alters the internal pressure of the first housing, forming a bidirectional dynamic filtration mechanism: when the elastic tube segment is depressed, the pressure inside the first housing increases, which not only performs reverse filtration on the filter screen to remove clogging impurities and maintain its permeability, but also applies positive pressure to the filter element of the second filtration mechanism, overcoming the flow resistance superposition problem of traditional two-stage filtration and improving the filter element's filtration efficiency; when the elastic tube segment rises, the pressure inside the first housing decreases, improving the filter screen's own filtration efficiency while creating a reverse suction effect on the filter element, further removing impurities from the filter element's surface. This structural design, through dynamic pressure adjustment, achieves alternating reverse filtration cleaning and efficiency optimization of the two-stage filtration elements, effectively solving the efficiency reduction problem caused by flow resistance superposition in two-stage filtration, and significantly improving overall filtration efficiency while ensuring high-precision filtration. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is another overall structural schematic diagram of the present invention.

[0018] Figure 3 This is a partial sectional view of the overall structure of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1-base, 2-first housing, 3-second housing, 301-discharge port, 302-through hole, 4-first connecting ring, 5-elastic tube segment, 6-second connecting ring, 7-first linear actuator, 8-connecting hose, 9-feed pump, 10-sealing seat, 11-block, 12-filter screen, 13-filter element, 14-limiting ring, 15-second linear actuator. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1

[0024] like Figures 1-3As shown, this utility model provides a two-stage filter, including a base 1. The top of the base 1 is provided with a first filter mechanism and a second filter mechanism that are interconnected from top to bottom. The first filter mechanism includes a first housing 2 and a cylindrical filter screen 12 disposed inside the first housing 2. The top of the first housing 2 is provided with an inlet corresponding to the filter screen 12. The inlet is connected to a feed pump 9 through a connecting hose 8. The feed pump 9 is fixedly installed on the top of the base 1, and a one-way valve is provided on the connecting hose 8. The first housing 2 is provided with an elastic tube section 5, which is sealed and installed on the first housing 2. The elastic tube section 5 is a corrugated pipe. A first linear actuator 7 for driving the extension and retraction of the elastic tube section 5 is fixedly installed on the outside of the first housing 2. The second filter mechanism includes a second housing 3. The top of the second housing 3 is provided with a plurality of through holes 302 arranged circumferentially along the filter screen 12. A filter element 13 is installed in the second housing 3 corresponding to each through hole 302. An outlet 301 is provided at the bottom of the side of the second housing 3. The bottom of the first housing 2 and the top of the second housing 3 are connected by threads.

[0025] The installation method of the first linear actuator 7 is as follows: a first connecting ring 4 is provided on the outer side of the first housing 2 above the elastic tube section 5, and a second connecting ring 6 is provided at the top of the side of the second housing 3. The two ends of the first linear actuator 7 are fixedly connected to the first connecting ring 4 and the second connecting ring 6, respectively. When the first linear actuator 7 is activated, the elastic tube section 5 is extended and retracted. When the elastic tube section 5 is pressed down, the pressure inside the first housing 2 increases, which simultaneously achieves reverse filtration of the filter screen 12, preventing impurities from clogging the filter screen 12, and pressurizing the filter element 13 to improve the filtration efficiency of the second filtration mechanism. When the elastic tube section 5 is raised, the pressure inside the first housing 2 decreases, which improves the filtration efficiency of the filter screen 12 while achieving reverse filtration of the filter element 13 of the second filtration mechanism.

[0026] A limiting ring 14 that cooperates with the filter screen 12 is fixedly installed inside the first housing 2 to restrict the expansion and contraction of the elastic tube section 5.

[0027] To enable the second filtration mechanism, a sealing seat 10 is also included. The sealing seat 10 is threaded onto the bottom end of the second housing 3 and is equipped with a sealing ring for sealing. The top end of the sealing seat 10 has multiple locking blocks 11 corresponding to the filter element 13. A second linear actuator 15 is connected and installed between the second connecting ring 6 and the top end of the base 1. The second linear actuator 15 can drive the entire first and second filtration mechanisms to lift, allowing the sealing seat 10 to be removed from the bottom end of the second housing 3 for cleaning.

[0028] In this embodiment, both the first linear actuator 7 and the second linear actuator 15 are cylinders or electric telescopic rods, which can be selected according to the actual situation.

[0029] Working principle:

[0030] In use, the connecting hose 8 is sealed and connected to the feed port at the top of the first housing 2. The feed pump 9 feeds the material into the dual-stage filter. When the liquid to be filtered enters the filter screen 12 of the first filtration mechanism, it is first initially filtered by the filter screen 12. The filtered fluid enters the filter element 13 of the second filtration mechanism through the through hole 302 for secondary filtration, and finally flows out from the discharge port 301. The first linear actuator 7 is activated. The extension and contraction of the first linear actuator 7 can change the length of the elastic tube section 5, thereby changing the pressure inside the first housing 2. When the first linear actuator 7 is activated, the elastic tube section 5 is extended and retracted. When the elastic tube section 5 is pressed down, the pressure inside the first housing 2 increases, and the filter screen 12 is reverse-filtered to prevent impurities from clogging the filter screen 12. At the same time, the filter element 13 is pressurized to improve the filtration efficiency of the second filtration mechanism. When the elastic tube section 5 is raised, the pressure inside the first housing 2 decreases, improving the filtration efficiency of the filter screen 12 while the filter element 13 of the second filtration mechanism is reverse-filtered. After the filtration process is complete, start the second linear drive 15 to drive the second connecting ring 6 to rise. At this time, the sealing seat 10 can be easily removed from the bottom of the second housing 3. Due to long-term use, a small amount of impurities may adhere to the surface of the card block 11, so the detachable design of the sealing seat 10 makes it easy to clean.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such 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 utility model.

Claims

1. A two-stage filter, characterized in that, The device includes a base, and at the top of the base, from top to bottom, are a first filter mechanism and a second filter mechanism that are interconnected. The first filter mechanism includes a first housing and a filter screen disposed inside the first housing. The top of the first housing has an inlet corresponding to the filter screen, and a one-way valve is installed at the inlet. The first housing has an elastic tube segment, and a first linear actuator for driving the elastic tube segment to extend and retract is fixedly installed on the outside of the first housing. The second filter mechanism includes a second housing, and at the top of the second housing, there are multiple through holes arranged circumferentially along the filter screen. A filter element is installed inside the second housing corresponding to each of the through holes. An outlet is provided at the bottom of the side of the second housing.

2. The two-stage filter according to claim 1, characterized in that, The feed inlet is connected to the feed pump via a connecting hose, and the feed pump is fixedly installed on the top of the base.

3. The two-stage filter according to claim 1, characterized in that, A limiting ring that mates with the filter screen is fixedly installed inside the first housing.

4. The two-stage filter according to claim 1, characterized in that, The second filtration mechanism further includes a sealing seat, which is sealed and installed at the bottom of the second housing, and the top of the sealing seat is provided with a plurality of locking blocks corresponding to the filter element.

5. The two-stage filter according to claim 4, characterized in that, The outer side of the first housing is provided with a first connecting ring above the elastic tube segment, and the top of the side of the second housing is provided with a second connecting ring. The two ends of the first linear actuator are fixedly connected to the first connecting ring and the second connecting ring, respectively.

6. The two-stage filter according to claim 5, characterized in that, A second linear actuator is connected and installed between the second connecting ring and the top of the base.

7. The two-stage filter according to claim 6, characterized in that, Both the first linear actuator and the second linear actuator are cylinders or electric telescopic rods.

8. The two-stage filter according to claim 1, characterized in that, The elastic pipe section is a corrugated pipe.

9. The two-stage filter according to claim 1, characterized in that, The bottom end of the first housing is connected to the top end of the second housing by a thread.

10. The two-stage filter according to claim 2, characterized in that, The one-way valve is installed on the connecting hose.

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