Capsule type filter without dead angles and filtrate residues

Abstract

The invention relates to a dead-corner-free and filtrate-residue-free capsule type filter which is characterized by comprising a shell, an end cover assembly, a filter element, a valve assembly and a flash tank assembly. And the end cover assembly is trumpet-shaped and is used for ensuring no residue of inlet and outlet liquid. The end cover assembly is fixedly connected with the shell, and the filter element is arranged in the shell. The multiple flash groove assemblies are arranged on the filter element and used for guaranteeing that no flash exists on the surface of the filter after welding, and no filtering dead angle is generated. The end covers comprise a first end cover and a second end cover, the valve assembly comprises an exhaust valve and a blow-down valve, the exhaust valve is arranged on the first end cover in a sleeving mode, and the blow-down valve is arranged on the second end cover in a sleeving mode. Compared with the prior art, the liquid inlet and outlet channel of the capsule type filter is of a dead-corner-free horn mouth design, and it is guaranteed that inlet and outlet liquid is free of residues; the design of the horn mouth can adapt to the connection between the interfaces of various specifications and the filter cylinder, and can reduce the stress concentration phenomenon at the interface and the joint.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a capsule filter with no dead angle and no filtrate residue. Background Art

[0002] The capsule filter is a filter that integrates the filter element and the shell. It is characterized by integrated use and disassembly, simple and fast operation, and is usually used in laboratory small-scale and pilot-scale filtration scenarios. The filter element of the capsule filter is directly welded to the inside of the shell, and the shell is provided with an inlet channel and an outlet channel. The liquid to be filtered enters from the inlet channel, fills the entire filter, and is filtered by the filter element. The filtered liquid flows out from the outlet channel.

[0003] The capsule filter is easy to use and has high filter integrity due to its integrated design. However, because the filter element needs to be welded inside the filter housing, dead angles are very likely to appear inside the filter. Therefore, the rationality of the structural design must be fully considered to avoid the problem of difficulty in discharging the accumulated liquid. At the same time, during the welding process, the plastic melts and flows under heat, and it is easy to overflow after solidification, forming local grooves, which will also produce dead angles and make it impossible to discharge the accumulated liquid. When different stock solutions need to be filtered, the presence of accumulated liquid will directly contaminate the replaced filtrate.

[0004] Therefore, it is urgent to develop a capsule filter that can ensure filtering performance while taking into account the processing and welding processes, and has no dead corners and filtrate residue inside the filter. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a capsule-type filter with no dead angle and no filtrate residue. The no-dead-angle bell mouth design ensures that there is no residue in the inlet and outlet liquids, and the bell mouth design can adapt to the connection between multiple specifications of interfaces and filter cylinders, and can reduce the stress concentration phenomenon at the interfaces and connections.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a capsule filter without dead angles and filtrate residue, comprising a housing, an end cover assembly, a filter element, a valve assembly and an overflow chute assembly;

[0008] The end cap assembly is trumpet-shaped, which is used to ensure that there is no residue in the inlet and outlet liquids and reduce the stress concentration at the interface of the end cap assembly and the connection between the filter element;

[0009] The end cover assembly is fixedly connected to the housing, and the filter element is arranged inside the housing;

[0010] There are several overflow trough assemblies, and the several overflow trough assemblies are all arranged on the filter. The overflow trough assemblies are used to ensure that there is no overflow on the filter surface after welding, and no filtering dead angle is generated;

[0011] The end cover comprises a first end cover and a second end cover, the valve assembly comprises an exhaust valve and a sewage valve, the exhaust valve is sleeved on the first end cover, and the sewage valve is sleeved on the second end cover.

[0012] Furthermore, the first end cover is an integrally formed trumpet-shaped plastic part, and the first end cover is provided with a first interface, a first channel and a first welding end cover;

[0013] The first interface is connected to the external liquid inlet;

[0014] The first channel runs through the first end cover, the first channel is used for raw liquid to flow in, and is connected to the first interface and the first welding end cover, the first welding end cover is provided with a welding groove, and the welding groove is provided with a chamfer;

[0015] An exhaust channel is provided on the side of the first end cover, and the exhaust channel is an inverted L-shaped cylindrical hole. The center line of the inverted L-shaped cylindrical hole is 0.5-1 mm higher than the upper surface of the first welding end cover.

[0016] Furthermore, two first protrusions are symmetrically provided on the outer ring of the exhaust channel, and the ends of the first protrusions are inclined surfaces.

[0017] Furthermore, the second end cover is an integrally molded trumpet-shaped plastic part, and the second end cover includes a second interface, a second channel and a second welding end cover, the second interface is connected to the external liquid outlet, the second channel runs through the second end cover, the second channel is used for the filtered liquid to flow out, and connects the second interface and the second welding end cover.

[0018] Furthermore, a drainage channel is provided on the side of the second end cover, and the drainage channel is an L-shaped cylindrical hole, and the center line of the L-shaped cylindrical hole is 0.5-1 mm lower than the lower surface of the second welded end cover;

[0019] Two second protrusions are symmetrically arranged on the outer circle of the sewage discharge channel, and the ends of the two second protrusions are both inclined surfaces.

[0020] Furthermore, the second welding end cover is provided with a welding groove and a welding boss, and the welding groove and the welding boss are both provided with chamfers.

[0021] Furthermore, the shell is a hollow cylinder, and a first welding surface and a second welding surface are respectively provided at both ends of the shell, the first welding surface is used to clamp with the first welding groove to form a first overflow groove; the second welding surface is used to clamp with the second welding groove to form a second overflow groove.

[0022] Furthermore, the filter element comprises a filter element end cap, a center column and a filter material, the filter material is placed between the center column and the outer frame, one end of the filter material is welded to the filter element end cap, and the other end is welded to the filter element welding end cap;

[0023] Conical holes are provided in the inner surfaces of both ends of the central column, and the conical holes are fitted with the lower surface of the filter element end cover to form a third overflow groove;

[0024] The chamfered corners on the upper surface of the filter element welding end cover are butted and fitted to form a fourth overflow groove.

[0025] Furthermore, the filter element further comprises an outer frame and a filter element welding end cover, the outer surfaces of both ends of the outer frame are provided with steps, the steps are butt-jointed with the chamfers of the lower surface of the filter element end cover to form a fifth overflow groove, and the steps are butt-jointed with the chamfers of the upper surface of the filter element welding end cover to form a sixth overflow groove;

[0026] The end cover boss on the lower surface of the filter element welding end cover is butted against the welding boss to form a seventh overflow groove.

[0027] Furthermore, a sealing groove is provided on the exhaust valve, and the exhaust valve is connected to the exhaust passage by using a first sealing element and a second sealing element;

[0028] An exhaust through hole is provided inside the exhaust valve, and a first circumferential sliding groove is provided on the outer ring of the exhaust valve, and the first circumferential sliding groove is slidably connected with a first protrusion on the exhaust channel;

[0029] The sewage valve is provided with a second sealing groove, and the sewage valve is connected to the sewage channel by using a third sealing element and a fourth sealing element;

[0030] A sewage discharge through hole is arranged inside the sewage discharge valve, and a second circumferential sliding groove is arranged on the outer ring. The second circumferential sliding groove is slidably connected with a second protrusion on the sewage discharge channel.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] 1. The liquid inlet and outlet channels of the capsule filter in the present invention are designed with a bell-mouth without dead angles to ensure that there is no residue in the inlet and outlet liquids; the bell-mouth design can adapt to the connection between interfaces of multiple specifications and the filter cylinder, and can reduce the stress concentration phenomenon at the interfaces and connections.

[0033] 2. The internal structure of the entire capsule filter of the present invention is designed without dead angles, and the overflow grooves of each welding part are designed to ensure that there is no overflow and no liquid accumulation during the welding process. In addition, the centerline position and size of the drainage channel in the present invention are reasonably designed to ensure that all residual liquid is discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a general schematic diagram of a capsule filter with no dead angle and no filtrate residue;

[0035] Figure 2 It is a schematic diagram of an explosion of a capsule filter with no dead angle and no filtrate residue;

[0036] Figure 3 A schematic diagram of the filtration process of a capsule filter with no dead angle and no filtrate residue;

[0037] Figure 4 It is a schematic diagram of the welding cross-section structure of a capsule filter with no dead angle and no filtrate residue;

[0038] Figure 5 The present invention is a schematic diagram of the working process of the exhaust valve and the sewage valve of a capsule filter with no dead angle and no filtrate residue.

[0039] Figure 1 Description of the mark in:

[0040] 1-first end cover, 2-second end cover, 3-housing;

[0041] Figure 2 Description of the mark in:

[0042] 1-first end cover, 2-second end cover, 3-housing, 4-filter element, 5-exhaust valve, 6-drain valve, 31-first welding surface, 32-second welding surface, 54-first circumferential slide groove, 64-second circumferential slide groove, 141-first protrusion, 241-second protrusion;

[0043] Figure 3 Description of the mark in:

[0044] 3- Shell;

[0045] Figure 4 Description of the mark in:

[0046] 11-first interface, 12-first channel, 13-first welding end cover, 14-exhaust channel, 21-second interface, 22-second channel, 23-second welding end cover, 24-drainage channel, 41-filter element end cover, 42-center column, 43-filter material, 44-outer frame, 45-filter element welding end cover, 131-first welding groove, 231-second welding groove, 232-welding boss, Ⅰ-first overflow groove, Ⅱ-second overflow groove, Ⅲ-third overflow groove, Ⅳ-fourth overflow groove, Ⅴ-fifth overflow groove, Ⅵ-sixth overflow groove, Ⅶ-seventh overflow groove;

[0047] Figure 5 Description of the mark in:

[0048] 51 - first sealing element, 52 - second sealing element, 53 - exhaust through hole, 61 - third sealing element, 62 - fourth sealing element, 63 - sewage through hole. DETAILED DESCRIPTION

[0049] The specific implementation methods of the present invention are described in detail below through examples. These examples are implemented on the premise of the scheme described in the present invention, and provide detailed implementation methods and specific operating processes, but the protection scope of the present invention is not limited to the following examples.

[0050] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Any features such as component models, material names, connection structures, preparation methods, materials, structures or composition ratios not clearly described in this technical solution are deemed to be common technical features disclosed in the prior art.

[0051] Example 1

[0052] This embodiment provides a capsule filter with no dead angle and no filtrate residue, such as Figure 1 and Figure 2 As shown, it includes a housing 3, an end cover assembly, a filter element 4, a valve assembly and an overflow trough assembly. The end cover assembly is fixedly connected to the housing 3, and the filter element 4 is arranged inside the housing 3. There are several overflow trough assemblies, and several overflow troughs are arranged on the filter. The overflow trough assembly is used to ensure that there is no overflow on the filter surface after welding, and no filtering dead angle is generated.

[0053] The end cap assembly is trumpet-shaped, which is used to ensure that there is no residue in the inlet and outlet liquid, and reduce the stress concentration at the interface of the end cap assembly and the connection between the filter element 4. The end cap includes a first end cap 1 and a second end cap 2. The first end cap 1 is an integral trumpet-shaped plastic part, which is provided with a first interface 11, a first channel 12 and a first welding end cap 13. The first interface 11 is connected to the external liquid inlet. The first channel 12 runs through the first end cap 1. The first channel 12 is used for the raw liquid to flow in, and connects the first interface 11 and the first welding end cap 13. The first welding end cap 13 is provided with a welding groove, and the welding groove is provided with a chamfer.

[0054] An exhaust channel 14 is provided on the side of the first end cover 1. The exhaust channel 14 is an inverted L-shaped cylindrical hole, and the center line of the inverted L-shaped cylindrical hole is 0.5-1 mm higher than the upper surface of the first welded end cover 13. Two first protrusions 141 are symmetrically provided on the outer circle of the exhaust channel 14, and the ends of the first protrusions 141 are inclined surfaces.

[0055] The second end cap 2 is an integrally formed trumpet-shaped plastic part, including a second interface 21, a second channel 22 and a second welded end cap 23. The second interface 21 is connected to the external liquid outlet. The second channel 22 runs through the second end cap 2. The second channel 22 is used for the filtered liquid to flow out and connects the second interface 21 and the second welded end cap 23. A drainage channel 24 is provided on the side of the second end cap 2. The drainage channel 24 is an L-shaped cylindrical hole. The center line of the L-shaped cylindrical hole is 0.5-1mm lower than the lower surface of the second welded end cap 23. Two second protrusions 241 are symmetrically arranged on the outer circle of the drainage channel 24. The ends of the two second protrusions 241 are both inclined. A welding groove and a welding boss 232 are provided on the second welded end cap 23. Both the welding groove and the welding boss 232 are chamfered.

[0056] The shell 3 is a hollow cylinder, and the two ends of the shell 3 are respectively provided with a first welding surface 31 and a second welding surface 32. The first welding surface 31 is used to engage with the first welding groove 131 to form a first overflow groove I; the second welding surface 32 is used to engage with the second welding groove 231 to form a second overflow groove II. The outer surface of the shell 3 is also provided with a fluid direction indicating arrow for easy reference during installation. Figure 3 shown.

[0057] like Figure 4 As shown, the filter element 4 includes a filter element end cap 41, a center column 42, a filter material 43, an outer frame 44 and a filter element welding end cap 45. The filter material 43 is placed between the center column 42 and the outer frame 44. One end of the filter material 43 is welded to the filter element 4 end cap, and the other end is welded to the filter element welding end cap 45. Conical holes are provided in the inner surfaces of both ends of the center column 42, and the conical holes are fitted with the lower surface of the filter element 4 end cap to form the third overflow groove III. The chamfered corners on the upper surface of the filter element 4 welding end cap are butt-jointed to form the fourth overflow groove IV. Steps are provided on the outer surfaces of both ends of the outer frame 44, and the steps are butt-jointed to the chamfered corners on the lower surface of the filter element end cap to form the fifth overflow groove V. The steps are butt-jointed to the chamfered corners on the upper surface of the filter element 4 welding end cap to form the sixth overflow groove VI. The end cap boss on the lower surface of the filter element 4 welding end cap is butt-jointed to the welding boss 232 to form the seventh overflow groove VII. The central column 42 and the outer frame 44 are also provided with a plurality of filtrate channels to enable the filtrate to pass through. All filtrate channels are designed with rounded corners, and the edges of the channels are designed with rounded corners, which are smooth and have no dead corners.

[0058] like Figure 5As shown, the valve assembly includes an exhaust valve 5 and a sewage valve 6, wherein the exhaust valve 5 is sleeved on the first end cover 1, and the sewage valve 6 is sleeved on the second end cover 2. A sealing groove is provided on the exhaust valve 5, and the exhaust valve 5 is connected to the exhaust channel 14 by a first sealing element 51 and a second sealing element 52. An exhaust through hole 53 is provided inside the exhaust valve 5, and a first circumferential slide groove 54 is provided on the outer ring, and the first circumferential slide groove 54 is slidably connected with the first protrusion 141 on the exhaust channel 14. The exhaust valve 5 is rotated counterclockwise, and the exhaust valve 5 moves to the right, and the air inside the capsule filter can be discharged from the connecting area formed by the exhaust channel 14 and the exhaust through hole 53.

[0059] The drain valve 6 is provided with a second sealing groove, and the drain valve 6 is connected to the drain channel 24 by using a third sealing element 61 and a fourth sealing element 62; a drain through hole 63 is provided inside the drain valve 6, and a second circumferential slide groove 64 is provided on the outer ring, and the second circumferential slide groove 64 is slidably connected with the second protrusion 241 on the drain channel 24. The drain valve 6 is rotated counterclockwise, and the drain valve 6 moves to the right, and the residual liquid inside the capsule filter can be discharged from the connection area formed by the drain channel 24 and the drain through hole 63.

[0060] All other channels and through holes in the present invention have smooth transitions, ensuring that the entire capsule filter interior is designed without dead angles.

[0061] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A capsule filter with no dead angle and no filtrate residue, characterized in that: It comprises a housing (3), an end cover assembly, a filter element (4), a valve assembly and an overflow chute assembly; The end cap assembly is trumpet-shaped, which is used to ensure that there is no residue in the inlet and outlet liquids and reduce the stress concentration at the interface of the end cap assembly and the connection between the filter element (4); The end cover assembly is fixedly connected to the outer shell (3), and the filter element (4) is arranged inside the outer shell (3); There are several overflow trough assemblies, and the several overflow trough assemblies are all arranged on the filter. The overflow trough assemblies are used to ensure that there is no overflow on the filter surface after welding, and no filtering dead angle is generated; The end cover comprises a first end cover (1) and a second end cover (2); the valve assembly comprises an exhaust valve (5) and a sewage valve (6); the exhaust valve (5) is sleeved on the first end cover (1), and the sewage valve (6) is sleeved on the second end cover (2).

2. The capsule filter with no dead angle and no filtrate residue according to claim 1, characterized in that: The first end cover (1) is an integrally formed trumpet-shaped plastic part, and the first end cover (1) is provided with a first interface (11), a first channel (12) and a first welding end cover (13); The first interface (11) is connected to an external liquid inlet; The first channel (12) passes through the first end cover (1), the first channel (12) is used for raw liquid to flow in, and is connected to the first interface (11) and the first welding end cover (13), the first welding end cover (13) is provided with a welding groove, and the welding groove is provided with a chamfer; An exhaust channel (14) is provided on the side of the first end cover (1), and the exhaust channel (14) is an inverted L-shaped cylindrical hole, and the center line of the inverted L-shaped cylindrical hole is 0.5-1 mm higher than the upper surface of the first welded end cover (13).

3. The capsule filter with no dead angle and no filtrate residue according to claim 2, characterized in that: Two first protrusions (141) are symmetrically arranged on the outer ring of the exhaust channel (14), and the ends of the first protrusions (141) are inclined surfaces.

4. The capsule filter with no dead angle and no filtrate residue according to claim 1, characterized in that: The second end cover (2) is an integrally formed trumpet-shaped plastic part, the second end cover (2) comprising a second interface (21), a second channel (22) and a second welding end cover (23), the second interface (21) being connected to an external liquid outlet, the second channel (22) penetrating the second end cover (2), the second channel (22) being used for allowing filtered liquid to flow out, and connecting the second interface (21) and the second welding end cover (23).

5. The capsule filter with no dead angle and no filtrate residue according to claim 4, characterized in that: A drainage channel (24) is provided on the side of the second end cover (2), and the drainage channel (24) is an L-shaped cylindrical hole, and the center line of the L-shaped cylindrical hole is 0.5-1 mm lower than the lower surface of the second welded end cover (23); Two second protrusions (241) are symmetrically arranged on the outer ring of the sewage discharge channel (24), and the ends of the two second protrusions (241) are both inclined surfaces.

6. The capsule filter with no dead angle and no filtrate residue according to claim 4, characterized in that: The second welding end cover (23) is provided with a welding groove and a welding boss (232), and both the welding groove and the welding boss (232) are provided with chamfers.

7. The capsule filter with no dead angle and no filtrate residue according to claim 1, characterized in that: The shell (3) is a hollow cylinder, and a first welding surface (31) and a second welding surface (32) are respectively provided at two ends of the shell (3); the first welding surface (31) is used to be clamped with a first welding groove (131) to form a first overflow groove (I); and the second welding surface (32) is used to be clamped with a second welding groove (231) to form a second overflow groove (II).

8. The capsule filter without dead angle and filtrate residue according to claim 1, characterized in that: The filter element (4) comprises a filter element end cover (41), a center column (42) and a filter material (43); the filter material (43) is placed between the center column (42) and the outer frame (44); one end of the filter material (43) is welded to the filter element (4) end cover, and the other end is welded to the filter element welding end cover (45); Conical holes are provided in the inner surfaces of both ends of the central column (42), and the conical holes are fitted with the lower surface of the end cover of the filter element (4) to form a third overflow groove (III); The chamfered corners on the upper surface of the welded end cover of the filter element (4) are butted together to form a fourth overflow groove (IV).

9. The capsule filter with no dead angle and no filtrate residue according to claim 8, characterized in that: The filter element (4) further comprises an outer frame (44) and a filter element welding end cover (45), the outer surfaces of both ends of the outer frame (44) are provided with steps, the steps are butt-jointed with the chamfered corners of the lower surface of the filter element end cover to form a fifth overflow groove (V), and the steps are butt-jointed with the chamfered corners of the upper surface of the filter element (4) welding end cover to form a sixth overflow groove (VI); The end cover boss on the lower surface of the welding end cover of the filter element (4) is butted against the welding boss (232) to form a seventh overflow groove (VII).

10. The capsule filter with no dead angle and no filtrate residue according to claim 1, characterized in that: The exhaust valve (5) is provided with a sealing groove, and a first sealing element (51) and a second sealing element (52) are used to connect the exhaust valve (5) and the exhaust passage (14); An exhaust through hole (53) is provided inside the exhaust valve (5), and a first circumferential sliding groove (54) is provided on the outer ring of the exhaust valve (5), wherein the first circumferential sliding groove (54) is slidably connected to a first protrusion (141) on the exhaust passage (14); The sewage discharge valve (6) is provided with a second sealing groove, and a third sealing element (61) and a fourth sealing element (62) are used to connect the sewage discharge valve (6) and the sewage discharge channel (24); The sewage valve (6) is provided with a sewage through hole (63) inside, and the outer ring is provided with a second circumferential sliding groove (64), and the second circumferential sliding groove (64) is slidably connected to the second protrusion (241) on the sewage channel (24).

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