Filter screen, filter ball valve and T-shaped filter

Abstract

The utility model relates to the technical field of filters, in particular to a filter screen, a filter ball valve and a T-shaped filter. The filter screen comprises a cylindrical filter screen body, a water inlet hole is formed in the side face of the filter screen body, and the filter screen further comprises a first magnetic part fixedly surrounding the water inlet hole. The filter ball valve and the T-shaped filter each comprise the filter screen, the first magnetic part is arranged at the water inlet hole of the filter screen body in a surrounding mode, so that the filter screen has magnetism to adsorb metal impurities such as scrap iron in water flow flowing through the filter screen, magnetic bars do not need to be additionally installed, the water flow in the filter screen is prevented from being hindered, and the service life of the filter screen is prolonged. The flow resistance of the filter screen is reduced, and the flow of the magnetic filter is improved. Due to the fact that the first magnetic part is arranged at the water inlet hole, water flow inevitably flows through the water inlet hole, compared with an existing magnetic rod structure, the water flow makes full contact with the first magnetic part, and therefore the magnetic attraction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter net, a filter ball valve and a T-shaped filter. Background Technique

[0002] Magnetic filters are generally installed in heat pump systems or boiler heating components to remove metal impurities such as iron filings in water flow, playing a filtering function.

[0003] The existing magnetic filter, such as the filter ball valve provided in the previous patent with the application number 202022495230.3, is assembled by the cooperation of a valve body, a filter net, an end cover and a magnetic rod. The magnetic rod is threadedly connected to the end cover, and the end cover is threadedly connected to the valve body and sealed by an O-ring. The filter net is placed in the valve body, and the water flow flows in from the inlet of the valve body, passes through the filter net for filtration and then flows out from the outlet of the valve body. The magnetic rod is placed in the center of the filter net to play a role in filtering metal impurities such as iron filings in the water flow. However, the above filter ball valve has the following problems: 1) The magnetic rod is installed in the center of the water flow channel, which hinders the water flow, affects the flow capacity of the filter ball valve, increases the flow resistance of the valve body, and reduces the flow rate of the filter ball valve; 2) The filter ball valve mainly relies on the magnetic rod to adsorb metal impurities such as iron filings in the water flow. Due to the structural and positional limitations of the magnetic rod, most of the water flow will bypass the magnetic rod, resulting in poor magnetic adsorption effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a filter net, a filter ball valve and a T-shaped filter to reduce the flow resistance of the filter net, improve the flow rate and magnetic attraction effect of the filter net.

[0005] To achieve this purpose, the technical solution adopted by the utility model is as follows:

[0006] A filter net, including a cylindrical filter net body, an inlet hole is opened on the side surface of the filter net body, and the filter net further includes a first magnetic part fixedly surrounding the inlet hole.

[0007] As an optional solution of the filter net, the first magnetic part is magnetic plastic or magnetic rubber.

[0008] As an optional solution of the filter net, the first magnetic part extends outward with the inlet hole as the center and covers the corresponding filter net body.

[0009] As an optional solution of the filter net, the inner surface of the first magnetic part is provided with protrusions and / or grooves distributed in a dot pattern.

[0010] As an alternative to the filter screen, both ends of the filter screen body along its axial direction respectively form a first opening and a second opening, and the filter screen further includes a second magnetic part fixedly surrounding the first opening and a third magnetic part fixedly surrounding the second opening.

[0011] As an alternative to the filter screen, both the second magnetic part and the third magnetic part are magnetic plastics or magnetic rubbers.

[0012] As an alternative to the filter screen, the second magnetic part blocks the first opening.

[0013] As an alternative to the filter screen, the water inlet hole is close to the first opening, and the first magnetic part and the second magnetic part are integrally formed.

[0014] The filter ball valve includes a valve body having a valve cavity, a valve core, and the above-mentioned filter screen. The valve core is rotatably arranged in the valve cavity to open or close the valve cavity. Part of the filter screen extends into the valve core and rotates synchronously with the valve core.

[0015] The T-shaped filter includes a valve body having a valve cavity and the above-mentioned filter screen. The valve body is provided with an inlet communicating with the valve cavity. The filter screen is installed in the valve cavity, and the water inlet hole is directly opposite and communicated with the inlet.

[0016] The beneficial effects of the present utility model are as follows:

[0017] For the filter screen proposed by the present utility model, by circumferentially arranging the first magnetic part at the water inlet hole of the filter screen, the filter screen has its own magnetism to adsorb metal impurities such as iron filings in the water flow passing through the filter screen, eliminating the need for additional installation of a magnetic rod, avoiding obstruction to the water flow inside the filter screen, reducing the flow resistance of the filter screen, and increasing the flow rate of the magnetic filter. Since the first magnetic part is arranged at the water inlet hole and the water flow necessarily passes through the water inlet hole, compared with the existing magnetic rod structure, the water flow has sufficient contact with the first magnetic part, thereby enhancing the magnetic adsorption effect. Description of the Drawings

[0018] Figure 1 is a cross-sectional view of the filter ball valve provided by an embodiment of the present utility model;

[0019] Figure 2 is the front view of the filter screen provided by an embodiment of the present utility model;

[0020] Figure 3 is the structural schematic diagram of the filter screen provided by an embodiment of the present utility model Figure 1 ;

[0021] Figure 4 is the structural schematic diagram of the filter screen provided by an embodiment of the present utility model Figure 2 ;

[0022] Figure 5 It is a schematic structural diagram of the T-shaped filter provided by the embodiment of the present utility model.

[0023] The names and reference numerals of the components in the figure are as follows:

[0024] 1. Valve body; 11. Valve cavity; 12. Inlet; 13. Outlet; 14. Installation port; 2. Filter screen body; 21. Water inlet area; 211. Water inlet hole; 22. Water outlet area; 3. First magnetic part; 31. Concave-convex structure; 4. Second magnetic part; 5. Spool; 51. Positioning groove; 6. Third magnetic part; 61. Main body part; 62. Positioning part; 7. Valve cover; 8. Valve rod. Specific embodiments

[0025] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0026] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0028] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] The technical solution of the present utility model will be further described below with reference to the drawings and through specific embodiments.

[0030] As Figure 1 shown, this embodiment provides a filter ball valve, which includes a valve body 1, a valve core 5, a filter screen, a valve cover 7 and a valve stem 8. The valve body 1 has a valve cavity 11, and an inlet 12 and an outlet 13 are provided on the valve body 1, both of which are connected or disconnected from the valve cavity 11. The valve core 5 is rotatably arranged in the valve cavity 11 so that the inlet 12 communicates with the outlet 13 through the valve cavity 11 or the inlet 12 is disconnected from the outlet 13, thereby opening or closing the valve cavity 11. Part of the filter screen extends into the valve core 5 and rotates synchronously with the valve core 5. The valve stem 8 is fixedly connected to the valve core 5 to drive the valve core 5 to rotate in the valve cavity 11 by rotating the valve stem 8. When the valve stem 8 drives the valve core 5 to rotate a set angle (generally 90°) to the closed position, the valve core 5 isolates the inlet 12 and the outlet 13, and the valve body 1 is in the closed state. When the valve stem 8 drives the valve core 5 to rotate reversely by the set angle, the inlet 12 communicates with the outlet 13 through the valve cavity 11, and the valve body 1 is in the open state. An installation port 14 is provided at the bottom end of the valve body 1, and the valve cover 7 is hermetically installed at the bottom end of the valve body 1 and plugs the installation port 14. The valve cover 7 is threadedly installed at the bottom end of the valve body 1 through a sealing ring to be detachably installed at the bottom end of the valve body 1. The filter screen is installed in the valve cavity 11, and the filter screen is located between the valve core 5 and the valve cover 7. When water flows into the valve cavity 11 from the inlet 12 of the valve body 1, after the filtering action of the filter screen, it flows out of the valve body 1 from the outlet 13 to achieve the filtration and purification of the water flow.

[0031] In the existing filter screen, it can not only filter non-metallic impurities, but also place a magnetic rod in the center of the filter screen to filter metal impurities such as iron filings in the water flow. However, the magnetic rod is installed in the center of the water flow channel, which has an obstructive effect on the water flow, affects the flow capacity of the filter ball valve, increases the flow resistance of the valve body, reduces the flow rate of the filter ball valve, and has a limited magnetic adsorption area and a small adsorption range due to the structural limitation of the magnetic rod.

[0032] To solve the above problems, as Figure 1As shown in the figure, this embodiment also proposes a filter screen, which includes a filter screen body 2 and a first magnetic part 3 fixedly surrounding the water inlet hole 211. Specifically, the filter screen body 2 has a water inlet area 21 and a water outlet area 22. The water inlet area 21 is directly opposite and communicated with the inlet 12, and the water outlet area 22 is directly opposite and communicated with the outlet 13. At least part of the water inlet area 21 is provided with the first magnetic part 3. By arranging the first magnetic part 3 around the water inlet hole 211 of the filter screen body 2, the filter screen has its own magnetism, so as to adsorb metal impurities such as iron filings in the water flow passing through the filter screen, without the need to install an additional magnetic rod, avoiding obstruction to the water flow in the filter screen, reducing the flow resistance of the filter screen, and increasing the flow rate of the magnetic filter. Since the first magnetic part 3 is arranged in the water inlet area 21 of the filter screen body 2, the water inlet area 21 has a magnetic attraction effect, and the water inlet area 21 is in full contact with the water flow, thus improving the magnetic attraction effect.

[0033] As Figure 1 and Figure 2 shown in the figure, the water inlet area 21 is provided with a water inlet hole 211 that is directly opposite and communicated with the inlet 12. The first magnetic part 3 is arranged around the circumferential direction of the water inlet hole 211. The first magnetic part 3 extends outward with the water inlet hole 211 as the center and covers the corresponding filter screen body 2. By providing the water inlet hole 211, it is avoided that the mesh holes of the filter screen body 2 are too small to obstruct the water flow, resulting in an increase in flow resistance. Since the first magnetic part 3 is arranged around the circumferential direction of the water inlet hole 211, the water flow can be in full contact with the first magnetic part 3 when passing through the water inlet hole 211, thereby enhancing the magnetic attraction effect.

[0034] Specifically, the filter screen body 2 is a cylindrical net, and the first magnetic part 3 is arranged along the circumferential direction of the filter screen body 2 in the water inlet area 21, and the first magnetic part 3 is spaced from the water outlet area 22. By arranging the first magnetic part 3 in the water inlet area 21, the entire water inlet area 21 has magnetism and is in full contact with the water flow, further improving the magnetic attraction effect. At the same time, since the first magnetic part 3 does not come into contact with the water outlet area 22, it is avoided that metal impurities such as iron filings adsorbed by the first magnetic part 3 block the mesh holes of the water outlet area 22, ensuring the flow rate of the magnetic filter, reducing the cleaning frequency of the filter screen, and prolonging the cleaning and replacement cycle of the filter screen.

[0035] It should be noted that the outer edge boundary of the first magnetic part 3 after expansion is rectangular, and the cross-section of the first magnetic part 3 is an arc concentric with the filter net body 2, and the central angle of the first magnetic part 3 is 180° to 200°. Exemplarily, the central angle of the first magnetic part 3 can be 180°, 185°, 190°, 195° or 200°, etc., so that the first magnetic part 3 has a suitable area. When the central angle of the first magnetic part 3 is too small, the occupied area of the first magnetic part 3 in the water inlet area 21 is small, and the magnetic attraction effect is poor. When the central angle of the first magnetic part 3 is too large, the distance between the first magnetic part 3 and the water outlet area 22 is too close, which easily causes the metal impurities adsorbed by the first magnetic part 3 to block the water outlet area 22 and affect the normal use of the magnetic filter.

[0036] As Figure 1 and Figure 3 shown, the inner surface of the first magnetic part 3 is evenly distributed with concave-convex structures 31, and the concave-convex structures 31 are protrusions and / or grooves distributed in a dot shape, so as to increase the area of the inner surface of the first magnetic part 3, thereby increasing the magnetic area of the filter net and enhancing the magnetic attraction effect, and further improving the filtering performance of the magnetic filter.

[0037] As Figure 2 and Figure 3 shown, the two ends of the filter net body 2 along its axis respectively form a first opening and a second opening, and the filter net further includes a second magnetic part 4 fixedly surrounding the first opening and a third magnetic part 6 fixedly surrounding the second opening. Specifically, the second magnetic part 4 seals the first opening, so that the top end of the filter net body 2 is sealed with the second magnetic part 4. By providing the second magnetic part 4 and the third magnetic part 6, not only the structural strength of the filter net is improved, but also the magnetic area of the filter net is further increased, the magnetic attraction effect is enhanced, and thus the filtering performance is improved.

[0038] Specifically, as Figure 1 shown, a positioning groove 51 is provided in the valve core 5, and the second magnetic part 4 is clamped in the positioning groove 51. Through the clamping fit between the second magnetic part 4 and the positioning groove 51, the positioning installation of the filter net is realized, and the installation accuracy of the filter net is improved. It can be understood that the second magnetic part 4 abuts against and clamps the inner side wall of the positioning groove 51, so that the filter net can rotate synchronously with the valve core 5.

[0039] In this embodiment, the first magnetic part 3, the second magnetic part 4, and the third magnetic part 6 are all magnetic plastics or magnetic rubbers. When the three magnetic parts are magnetic plastics, the specific material can be modified magnetic injection molding particles, so as to facilitate the integral injection molding of the first magnetic part 3, the second magnetic part 4, and the third magnetic part 6, improving the processing efficiency of the first magnetic part 3, the second magnetic part 4, and the third magnetic part 6. Specifically, the first magnetic part 3 and the second magnetic part 4 are filled and injection molded on the filter net body 2, and the first magnetic part 3 wraps the mesh holes of the water inlet area 21 to form a magnetic adsorption layer with a certain thickness to ensure the magnetic adsorption effect of the filter net. The plastic grades of the first magnetic part 3 and the second magnetic part 4 include, but are not limited to, polyethylene, random copolymer polypropylene, polyvinyl chloride, or acrylonitrile-butadiene-styrene copolymer, and any of the above plastics has magnetism after modification. Since the plastic modification process is a prior art, it will not be elaborated here. As Figure 1 and Figure 3 shown, the inner surfaces of the second magnetic part 4 and the third magnetic part 6 are evenly distributed with protrusions and / or grooves in a dot pattern. The protrusions and / or grooves in a dot pattern increase the area of the inner surfaces of the second magnetic part 4 and the third magnetic part 6, thereby increasing the magnetic area of the filter net, enhancing the magnetic adsorption effect, and further improving the filtering performance of the magnetic filter.

[0040] As Figures 2 to 4 shown, the water inlet hole 211 is close to the first opening, and the first magnetic part 3 and the second magnetic part 4 are integrally formed to improve the preparation efficiency of the first magnetic part 3 and the second magnetic part 4. The bottom end of the filter net body 2 is provided with a third magnetic part 6 along the circumference. The third magnetic part 6 has the same material and molding method as the first magnetic part 3 and the second magnetic part 4, that is, it is filled and injection molded through the second opening at the bottom end of the filter net body 2. The bottom end of the filter net body 2 is provided with an open mouth to form a second opening, so as to facilitate cleaning the non-metallic impurities and metallic impurities adsorbed in the filter net body 2 through the second opening.

[0041] As Figure 1 and Figure 4 shown, the third magnetic part 6 includes a main body part 61 and a positioning part 62. The main body part 61 is provided along the circumference at the bottom end of the filter net body 2, and the positioning part 62 protrudes from the outer side of the circumference of the main body part 61. The main body part 61 abuts against the inner bottom wall of the valve cover 7, and the positioning part 62 is clamped between the valve cover 7 and the bottom end of the valve body 1. By providing the positioning part 62, the valve cover 7 and the valve body 1 can clamp the filter net, thereby realizing the axial positioning and installation of the filter net in the valve cavity 11.

[0042] As Figure 5As shown in the figure, this embodiment also provides a T-shaped filter. The T-shaped filter includes a valve body 1 having a valve cavity 11 and the above-mentioned filter net. The valve body 1 is provided with an inlet 12 communicating with the valve cavity 11. The filter net is installed in the valve cavity 11, and the water inlet hole 211 is directly opposite and communicated with the inlet 12. By surrounding the first magnetic part 3 at the water inlet hole 211 of the filter net body 2, the filter net has its own magnetism to adsorb metal impurities such as iron filings in the water flow passing through the filter net, eliminating the need for additional installation of a magnetic rod, avoiding obstruction to the water flow in the filter net, reducing the flow resistance of the filter net, and increasing the flow rate of the magnetic filter.

[0043] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. Filter screen, including a cylindrical filter screen body (2), the side surface of the filter screen body (2) is provided with a water inlet hole (211), characterized in that, The filter screen further includes a first magnetic part (3) fixedly surrounding the water inlet hole (211).

2. The filter screen according to claim 1, characterized in that, The first magnetic part (3) is made of magnetic plastic or magnetic rubber.

3. The filter screen according to claim 1, characterized in that, The first magnetic part (3) extends outward with the water inlet hole (211) as the center and covers the corresponding filter screen body (2).

4. The filter screen according to claim 3, wherein The inner surface of the first magnetic part (3) is provided with protrusions and / or grooves distributed in a dot pattern.

5. The filter screen according to claim 1, wherein, Both ends of the filter screen body (2) along its axial direction respectively form a first opening and a second opening. The filter screen further includes a second magnetic part (4) fixedly surrounding the first opening and a third magnetic part (6) fixedly surrounding the second opening.

6. The filter screen according to claim 5, characterized in that Both the second magnetic part (4) and the third magnetic part (6) are made of magnetic plastic or magnetic rubber.

7. The filter screen according to claim 6, characterized in that, The second magnetic part (4) seals the first opening.

8. The filter screen according to claim 6, wherein The water inlet hole (211) is close to the first opening, and the first magnetic part (3) and the second magnetic part (4) are integrally formed.

9. Filter ball valve, characterized in that, It includes a valve body (1) having a valve cavity (11), a valve core (5), and the filter screen according to any one of claims 1 to 8. The valve core (5) is rotatably arranged in the valve cavity (11) to open or close the valve cavity (11). Part of the filter screen extends into the valve core (5) and rotates synchronously with the valve core (5).

10. T-type filter, characterized in that, It includes a valve body (1) having a valve cavity (11) and the filter screen according to any one of claims 1 to 8. The valve body (1) is provided with an inlet (12) communicating with the valve cavity (11). The filter screen is installed in the valve cavity (11), and the water inlet hole (211) is directly opposite and communicated with the inlet (12).

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