Non-return filter with pollution discharge function

Abstract

The utility model discloses a non-return filter with a pollution discharge function, which comprises a valve body, an inlet cavity, an outlet cavity, a filter cavity, a valve cover and the like, a water through hole is arranged between the filter cavity and the inlet cavity, a filter cartridge which covers the water through hole and forms plugging filtration is arranged in the filter cavity, and a non-return component which elastically stops opening and closing the water through hole in a non-return manner is arranged in the filter cartridge; therefore, various impurities accumulated in the filter cartridge cannot flow back into a pipeline system due to the elastic non-return closing of the water through hole by the non-return assembly, so that the filtering effectiveness is ensured. Meanwhile, the top of the valve body is provided with a mounting port communicated with the filter cavity and a valve cover for sealing the mounting port, and the top of the valve cover can be provided with a discharge hole communicated with the filter cavity and an opening and closing valve hermetically mounted in the discharge hole; therefore, various impurities in the filter cartridge can be conveniently cleaned only by opening and closing the valve, particularly, the valve cover and the filter cartridge do not need to be detached in the cleaning process, the connection sealing performance between the valve cover and the valve body is guaranteed, and the risk of sealing failure is eliminated.

Description

Technical Field

[0001] The utility model relates to a filter, in particular to a non-return filter with a sewage discharge function. Background Art

[0002] The filter is a special valve that is used in different fields. It is mainly used to remove various impurities such as solid particles mixed in the fluid medium or dust in the gas medium in the pipeline system. In order to facilitate the filtering of these impurities, a filter cartridge is usually installed in the filter. However, after long-term use of the filter, various impurities mixed in the medium will accumulate in the filter cartridge. When the medium stops flowing or backflow occurs in the pipeline system, all these impurities accumulated in the filter cartridge will flow back into the pipeline system, causing the filter to fail to play its due filtering role. At the same time, if it is necessary to clean the various impurities in the filter cartridge, it is necessary to disassemble and assemble the filter cartridge by unscrewing the valve cover. This cleaning method will have the following problems: First, since the process of disassembling and assembling the filter cartridge is relatively cumbersome and inconvenient, it is difficult for users to clean the filter cartridge in time; second, after frequently disassembling and assembling the valve cover, the connection sealing performance between the valve cover and the valve body will be reduced, so there is a risk of sealing failure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a non-return filter which can prevent the backflow of impurities in the filter cartridge and facilitate the cleaning of the impurities in the filter cartridge.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A non-return filter with sewage discharge function comprises a valve body, and an inlet cavity and an outlet cavity respectively arranged at both ends of the valve body, wherein a filter cavity is arranged in the valve body, and a water hole is arranged between the filter cavity and the inlet cavity; a filter cartridge is arranged in the filter cavity, and the filter cartridge covers the water hole and blocks and filters the filter cavity and the outlet cavity, and an elastic non-return non-return component for opening and closing the water hole is also arranged in the filter cartridge.

[0006] The top of the valve body is provided with an installation opening connected to the filter cavity and a valve cover sealing the installation opening.

[0007] The top of the valve cover is provided with a discharge hole connected to the filter chamber and an opening and closing valve sealed in the discharge hole or the top of the valve cover is closed.

[0008] The check assembly includes a valve flap seat, a valve flap rod arranged on the top of the valve flap seat and a valve flap installed at the bottom of the valve flap seat. The valve flap rod is provided with a set check spring. The upper end of the check spring elastically pushes on a pressure ring fixedly installed in the filter chamber, and the lower end of the check spring elastically pushes on the valve flap seat. The valve flap seat is elastically pushed by the check spring to push the valve flap to seal and close the water hole.

[0009] The water hole is arranged on the diaphragm in the valve body, the axis lines of the water hole, the filter cartridge and the filter cavity overlap, and the axis line of the water hole is perpendicular to the axis lines of the inlet cavity and the outlet cavity.

[0010] The periphery of the water through hole is provided with an annular flange which forms dynamic sealing contact with the valve disc.

[0011] The inner wall of the filter cavity is provided with an annular inner shoulder, and the pressing ring is pressed onto the annular inner shoulder through the valve cover to be fixed.

[0012] The pressure ring is provided with a central guide hole and a plurality of drainage holes arranged around the guide hole. The valve flap rod passes through and is movably arranged in the guide hole to form a lifting and lowering movable guide for the valve flap seat.

[0013] The bottom surface of the pressure ring is provided with an inner positioning groove and an outer positioning groove which are arranged concentrically with the guide hole. The upper end of the check spring is positioned and mounted in the inner positioning groove, and the upper end of the filter cartridge is positioned and mounted in the outer positioning groove. The lower end of the filter cartridge contacts the top surface of the diaphragm.

[0014] The outlet end of the opening and closing valve is provided with a hose connector.

[0015] Compared with the prior art, the utility model mainly adds a filter chamber in the valve body, and provides a water hole between the filter chamber and the inlet chamber; at the same time, a filter cartridge is provided in the filter chamber, and the filter cartridge covers the water hole and blocks and filters the filter chamber and the outlet chamber, and a check assembly is provided in the filter cartridge to facilitate elastic check opening and closing of the water hole; in this way, when the medium in the pipeline system stops flowing or backflow occurs in the pipeline system, various impurities accumulated in the filter cartridge will not flow back into the pipeline system due to the elastic check closure of the water hole by the check assembly, thereby ensuring that the filter can play its due filtering role. In addition, a mounting port connected to the filter chamber and a valve cover that seals and closes the mounting port are provided on the top of the valve body, and a discharge hole connected to the filter chamber and an opening and closing valve that is sealably installed in the discharge hole are provided on the top of the valve cover; therefore, various impurities in the filter cartridge can be easily cleaned only by using the opening and closing valve, that is, the function of direct sewage discharge can be achieved by using the opening and closing valve, and in particular, the valve cover and the filter cartridge do not need to be disassembled during the entire cleaning process, so the connection sealing performance between the valve cover and the valve body can be better guaranteed, and the risk of sealing failure is also eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model (an opening and closing valve is installed on the top of the valve cover).

[0017] Figure 2 It is a cross-sectional view of the utility model (the top of the valve cover is closed).

[0018] Figure 3 A cross-sectional view of the valve body.

[0019] Figure 4 This is a cross-sectional view of the pressure ring.

[0020] Figure 5 for Figure 4 Stereoscopic diagram.

[0021] Figure 6 for Figure 1 Cross-sectional view of the middle valve cover.

[0022] Figure 7 for Figure 6 Stereoscopic diagram.

[0023] Figure 8 for Figure 2 Cross-sectional view of the middle valve cover.

[0024] Fig. 9 for Figure 8 Stereoscopic diagram.

[0025] Fig.10 for Figure 1 A three-dimensional view of the middle disc seat.

[0026] Fig.11 for Figure 2 Cross-sectional view of the middle disc seat.

[0027] Fig.12 for Fig.11 Stereoscopic diagram. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0029] like Figure 1 to Figure 12 As shown, 1. valve body, 11. diaphragm, 12. water hole, 13. annular flange, 14. annular inner shoulder, 15. installation port, 2. valve cover, 21. discharge hole, 22. hexagonal wrench, 3. opening and closing valve, 31. hose connector, 4. pressure ring, 41. guide hole, 42. drain hole, 43. inner positioning groove, 44. outer positioning groove, 5. check assembly, 51. valve disc seat, 511. installation ring groove, 52. valve disc rod, 53. valve disc, 54. check spring, 6. filter cartridge, 7. inlet cavity, 8. outlet cavity, 9. filter cavity, 10. mouth surface gasket.

[0030] A non-return filter with a sewage discharge function, such as Figure 1 , Figure 2 As shown, it is mainly used to remove various impurities such as solid particles mixed in the fluid medium or dust in the gas medium in the pipeline system. Its structure includes a valve body 1, an inlet cavity 7 and an outlet cavity 8 respectively arranged at both ends of the valve body, and a filter cavity 9 arranged in the valve body. The top of the valve body 1 is provided with a mounting port 15 connected to the filter cavity 9. The inlet cavity 7 and the outlet cavity 8 are just on the same horizontal axis. Therefore, the valve body 1 can form a "⊥"-shaped connected three-way valve body through the inlet cavity 7, the outlet cavity 8 and the filter cavity 9.

[0031] A water hole 12 is provided between the filter chamber 9 and the inlet chamber 7. The water hole is a circular through hole arranged on the diaphragm 11 in the valve body 1. A filter cartridge 6 is provided in the filter chamber 9. The filter cartridge covers the water hole 12 and just blocks the filter chamber 9 and the outlet chamber 8 to form a filter. Therefore, various impurities that enter the filter cartridge 6 through the water hole 12 from the inlet chamber 7 will be blocked and accumulated in the filter cartridge, thereby preventing these impurities from directly entering the outlet chamber 8.

[0032] The axis lines of the water hole 12 , the filter cartridge 6 and the filter chamber 9 overlap, and the axis line of the water hole 12 is perpendicular to the axis lines of the inlet chamber 7 and the outlet chamber 8 .

[0033] The filter cartridge 6 is also provided with a check assembly 5 for elastically checking the opening and closing of the water hole 12. The check assembly includes a valve flap seat 51, a valve flap rod 52 arranged on the top of the valve flap seat and a valve flap 53 installed at the bottom of the valve flap seat. The valve flap rod 52 is usually extended as a whole at the top of the valve flap seat 51. A set check spring 54 is provided on the outside of the valve flap rod 52, and the upper end of the check spring elastically pushes on the pressure ring 4 fixedly installed in the filter chamber 9, and the lower end of the check spring 54 elastically pushes on the valve flap seat 51. Therefore, under normal circumstances, the valve flap seat is elastically pushed by the check spring 54 to push the valve flap 53 to seal and close the water hole 12.

[0034] The bottom surface of the valve disc seat 51 is provided with a mounting annular groove 511 for embedding and fixing the valve disc 53 . The periphery of the water through hole 12 is provided with an annular flange 13 , and a dynamic sealing contact is formed with the valve disc 53 via the annular flange.

[0035] The fixing installation structure of the pressing ring 4 is as follows: the inner wall of the filter chamber 9 is provided with an annular inner shoulder 14, and the pressing ring 4 is fixed by pressing the valve cover 2 on the annular inner shoulder 14, and the valve cover 2 is mainly installed in the installation port 15 by screwing, and a mouth gasket 10 is provided between the two to form a sealed closure, and a hexagonal wrench 22 is provided on the outside of the valve cover 2 to facilitate the connection and installation using a wrench.

[0036] The pressure ring 4 is provided with a guide hole 41 located in the center and a plurality of drainage holes 42 arranged around the guide hole. In this embodiment, two symmetrically arranged semicircular holes are selected as the drainage holes 42 to facilitate water flow; the valve flap rod 52 passes through and is movably arranged in the guide hole 41, thereby forming a lifting and lowering movable guide for the valve flap seat 51.

[0037] The bottom surface of the pressure ring 4 is provided with an inner positioning groove 43 and an outer positioning groove 44 which are arranged concentrically with the guide hole 41. The upper end of the check spring 54 can be positioned and mounted in the inner positioning groove 43, and the upper end of the filter cartridge 6 can be positioned and mounted in the outer positioning groove 44. The lower end of the filter cartridge 6 contacts the top surface of the diaphragm 11, thereby forming a positioning and mounting structure for the filter cartridge 6.

[0038] In this way, when the medium in the pipeline system stops flowing or backflow occurs in the pipeline system, various impurities accumulated in the filter cartridge 6 will not flow back into the pipeline system due to the elastic non-return closure of the water hole 12 by the non-return component 5, thereby ensuring that the filter can play its due filtering role.

[0039] At the same time, the top of the valve cover 2 can be Figure 1 The structure shown, that is, a discharge hole 21 connected to the filter chamber 9 is provided on the top of the valve cover 2, and a sealing opening and closing valve 3 is provided in the discharge hole. In this embodiment, a ball valve is selected as the opening and closing valve, and the ball valve and the filter share a valve cover. In actual use, any valve with a medium cut-off opening and closing function can be used, such as a gate valve or a butterfly valve. A hose connector 31 is provided at the outlet end of the opening and closing valve 3 for external discharge.

[0040] At this time, various impurities in the filter cartridge 6 can be easily cleaned by opening and closing the valve 3, that is, the sewage discharge effect can be achieved by using the opening and closing valve 3. In particular, the entire cleaning process does not require disassembly of the valve cover 2 and the filter cartridge 6, so the mouth gasket 10 can be prevented from being deformed due to multiple disassembly and assembly, thereby better ensuring the connection sealing performance between the valve cover 2 and the valve body 1, and eliminating the risk of sealing failure.

[0041] Of course, the top of the valve cover 2 can also be made of Figure 2 In the closed structure shown, the overall structure of the filter is simpler and the appearance is smaller, which can be used in a small installation space, but it does not have the function of direct sewage discharge.

[0042] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A non-return filter with a sewage discharge function, comprising a valve body (1), and an inlet cavity (7) and an outlet cavity (8) respectively arranged at two ends of the valve body, characterized in that A filter chamber (9) is provided in the valve body (1), and a water hole (12) is provided between the filter chamber and the inlet chamber (7); a filter cartridge (6) is provided in the filter chamber (9), and the filter cartridge covers the water hole (12) and blocks and filters the filter chamber (9) and the outlet chamber (8); a non-return component (5) for opening and closing the water hole (12) is also provided in the filter cartridge (6) with an elastic non-return function.

2. A non-return filter with sewage discharge function according to claim 1, characterized in that The top of the valve body (1) is provided with a mounting opening (15) communicating with the filter chamber (9) and a valve cover (2) sealingly closing the mounting opening.

3. A non-return filter with sewage discharge function according to claim 2, characterized in that The top of the valve cover (2) is provided with a discharge hole (21) communicating with the filter chamber (9) and an on-off valve (3) sealably installed in the discharge hole or the top of the valve cover (2) is closed.

4. A non-return filter with sewage discharge function according to claim 2, characterized in that The non-return assembly (5) comprises a valve flap seat (51), a valve flap rod (52) arranged at the top of the valve flap seat, and a valve flap (53) installed at the bottom of the valve flap seat. The valve flap rod (52) is provided with a set non-return spring (54) outside. The upper end of the non-return spring elastically pushes on a pressure ring (4) fixedly installed in the filter chamber (9), and the lower end of the non-return spring (54) elastically pushes on the valve flap seat (51). The valve flap seat is elastically pushed by the non-return spring (54) to push the valve flap (53) to seal and close the water through hole (12).

5. A non-return filter with sewage discharge function according to claim 4, characterized in that The water through hole (12) is arranged on the diaphragm (11) in the valve body (1); the axis lines of the water through hole (12), the filter cartridge (6) and the filter chamber (9) overlap; the axis line of the water through hole (12) is perpendicular to the axis lines of the inlet chamber (7) and the outlet chamber (8).

6. A non-return filter with sewage discharge function according to claim 4, characterized in that An annular flange (13) is provided on the periphery of the water through hole (12) and forms a dynamic sealing contact with the valve flap (53).

7. A non-return filter with sewage discharge function according to claim 4, characterized in that The inner wall of the filter chamber (9) is provided with an annular inner shoulder (14), and the pressing ring (4) is pressed onto the annular inner shoulder (14) by the valve cover (2) to be fixed.

8. A non-return filter with sewage discharge function according to claim 4, characterized in that The pressure ring (4) is provided with a central guide hole (41) and a plurality of drainage holes (42) arranged around the guide hole. The valve flap rod (52) passes through and is movably arranged in the guide hole (41) to form a guide for the valve flap seat (51) to move upward and downward.

9. A non-return filter with sewage discharge function according to claim 5, characterized in that The bottom surface of the pressure ring (4) is provided with an inner positioning groove (43) and an outer positioning groove (44) which are arranged concentrically with the guide hole (41); the upper end of the check spring (54) is positioned and mounted in the inner positioning groove (43); the upper end of the filter cartridge (6) is positioned and mounted in the outer positioning groove (44); and the lower end of the filter cartridge (6) contacts the top surface of the diaphragm (11).

10. A non-return filter with sewage discharge function according to claim 3, characterized in that The outlet end of the on-off valve (3) is provided with a hose connector (31).

Images