High-economy bag type filter

Abstract

The utility model discloses a high economical efficiency bag type filter, including filter shell, outlet cover and filter element, filter element is located in the circulation cavity that filter shell and outlet cover form, the filter element close to the outlet cover one side is equipped with interface end cover, the interface end cover one side is equipped with first bulge towards the outlet cover, the first bulge is equipped with second bulge, the first bulge is equipped with second bulge, the second bulge is equipped with second bulge. The first protrusion is close to the outer edge of the connector end cover, the outlet cover is provided with a first connecting body corresponding to the first protrusion, and the first protrusion and the first connecting body are connected and fixed. According to the utility model, the volume of the cavity outside the joint of the filter element and the outlet cover is reduced through the arrangement of the first bulge and the first connector, so that the dead volume of the filter is reduced, and the filtering economy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter filter technical field, especially relate to a high economic bag type filter. BACKGROUND

[0002] The existing bag type filter, most have a closed container, be equipped with two joints respectively on the container, be used for liquid inlet and liquid outlet respectively, the filter core in the interior adopts the folding filter membrane, the filter surface area is big, is suitable for the filtration of larger volume solution. At present, the widely used bag type filter on the market, such as Chinese patent publication No. CN221182326U discloses a high structural stability folding filter core and filter, in actual use process, in order to the liquid entering bag type filter is filtered clean to the maximum extent, will adopt the way of liquid inlet one end and liquid outlet the other end, the liquid of filter is completed filtration to the maximum extent. However, after filtration, there is always a part of liquid remaining in the cavity between filter core and bag shell, and its height is lower than the lowest liquid level of filter core liquid inlet. This part of liquid is also called dead volume of bag type filter. Dead volume occupies larger space, can lead to the loss of this part of material liquid, reduces the recovery rate of material liquid, brings economic loss to the user. SUMMARY

[0003] The utility model provides a high economic bag type filter, through the setting of first protruding and first connecting body reduces the cavity volume outside the connecting place of filter core and outlet cover, to reduce the dead volume of filter, improves the filtration economy.

[0004] In order to realize the above object, the utility model adopts the following technical scheme:

[0005] A kind of high economic bag type filter, including filter shell, outlet cover and filter core, the filter core is located in the flow-through cavity formed by filter shell and outlet cover, the side of filter core close to outlet cover is equipped with interface end cap, the side of interface end cap towards outlet cover is equipped with first protruding, the first protruding is close to the outer edge of interface end cap, the outlet cover is equipped with the first connecting body corresponding to first protruding, the first protruding and first connecting body are connected and fixed. Since first protruding and corresponding first connecting body are close to the outer edge of interface end cap, the connecting part of filter core and outlet cover is away from central region, the cavity volume outside first protruding and first connecting body reduces, the dead volume size of filter at this place is obviously reduced, so that more material liquid can enter filter core and be filtered, especially when material liquid is less or material liquid itself is relatively expensive, can greatly reduce material liquid waste, thereby reducing the economic loss of user, improve filtration economy.

[0006] As preferred, the center area of the interface end cover is provided with a liquid outlet through hole, the interface end cover is provided with a second protrusion outside the periphery of the liquid outlet through hole, the outlet cover is provided with a second connecting body corresponding to the second protrusion, and the second protrusion and the second connecting body are connected and fixed. The second protrusion and the second connecting body are connected, the filter element and the center area of the outlet cover are also fixed, and the connection stability between the filter element and the outlet cover is further improved.

[0007] As preferred, the first connecting body and the second connecting body protrude from the plane of the outlet cover, and at least one side of the first connecting body and the second connecting body is provided with a clearance. The clearance facilitates the heater to contact the first connecting body and the second connecting body during welding, while avoiding the heater from contacting other areas of the outlet cover, thereby ensuring the welding quality.

[0008] As preferred, the outlet cover is provided with a third protrusion outside the periphery of the first connecting body, the shell of the filter element is provided with a liquid inlet through hole, and the top surface of the third protrusion is not higher than the liquid inlet through hole of the shell closest to the outlet cover. In this way, the third protrusion can fill the dead volume space between the filter element and the filter housing, thereby further improving the recovery rate of the material liquid, without affecting the liquid flow. Moreover, due to the presence of the third protrusion, the gap between the filter element and the filter housing can be increased, thereby improving the filtering efficiency.

[0009] As preferred, the fitting gap between the third protrusion and the shell of the filter element is 0.2-2mm. A reasonable fitting gap can ensure a smaller dead volume, while the shell of the filter element does not interfere with the third protrusion during welding.

[0010] As preferred, the first connecting body and the second connecting body are recessed in the plane of the outlet cover, and at least one side of the first connecting body and the second connecting body is provided with a clearance. The clearance facilitates the heater to contact the first connecting body and the second connecting body during welding, while avoiding the heater from contacting other areas of the outlet cover, thereby ensuring the welding quality. Moreover, the first connecting body and the second connecting body recessed in this way can further reduce the dead volume space.

[0011] As preferred, the outlet cover is provided with an outlet cover protrusion between the first connecting body and the second connecting body, and the outlet cover protrusion is shaped to be compatible with the interface end cover. The outlet cover protrusion can fill the space between the first connecting body and the second connecting body, improve the overall strength of the outlet cover, and ensure accurate positioning of the filter element.

[0012] As preferred, the outlet cover is provided with a backflow interface, and the interface end cover is provided with a groove communicating the backflow interface and the flow-through cavity. After filtration is completed, due to the gap between the third protrusion and the filter element, the liquid in the gap can be easily discharged by opening the backflow interface.

[0013] As preferred, the outer side region of the outlet cover is connected and fixed with the filter shell; and / or, the surface of the outlet cover on the inner side of the first connecting body is provided in an inclined shape. The design of the inclined surface can prevent the filtered material liquid from accumulating on the surface of the outlet cover, thereby causing waste.

[0014] As preferred, the connection and fixation is achieved by welding.

[0015] The beneficial effects of the present application are as follows: (1) by setting the positions of the first protrusion and the first connecting body as far away from the central region of the filter core as possible, the volume of the cavity on the outer side of the first protrusion and the first connecting body is reduced, thereby significantly reducing the dead volume and improving the material liquid recovery rate; (2) the outlet cover is connected with the outlet cover of the filter core through the first connecting body and the second connecting body, thereby improving the connection stability of the filter core and the outlet cover and ensuring the positioning accuracy between the filter core and the outlet cover; (3) by setting the third protrusion, the dead volume is further reduced without affecting the filtering efficiency; (4) by setting the gap, the welding difficulty is reduced and the welding stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the present application embodiment 1;

[0017] Figure 2 is a structural schematic view of the outlet cover of the present application embodiment 1;

[0018] Figure 3 is a structural schematic view of the present application embodiment 2;

[0019] Figure 4 is a structural schematic view of the outlet cover of the present application embodiment 2;

[0020] Figure 5 is a structural schematic view of the present application embodiment 3;

[0021] Figure 6 is a structural schematic view of the present application embodiment 4.

[0022] In the figure: filter shell 1, liquid inlet interface 11, filter core 2, shell 21, liquid inlet through hole 211, liquid inlet through hole 211a closest to the outlet cover, interface end cover 22, liquid outlet through hole 221, first protrusion 222, second protrusion 223, outlet cover 3, backflow interface 31, liquid outlet interface 32, first connecting body 33, outer side region 34, second connecting body 35, third protrusion 36, outlet cover protrusion 37. DETAILED DESCRIPTION

[0023] The present application will be further described below in combination with the drawings and specific embodiments.

[0024] Embodiment 1

[0025] As Figure 1 , Figure 2 shown in the embodiment, a high economy bag filter, comprising a filter shell 1, an outlet cover 3 and a filter core 2, the outer side area 34 of the outlet cover 3 is connected and fixed with the filter shell 1, the connection and fixation can be achieved by one or more of the following: hot welding, ultrasonic welding and eddy current welding. The filter shell 1 and the outlet cover 3 form a flow cavity for the inlet and outlet of the liquid, and the filter core 2 is located in the flow cavity. The top of the filter shell 1 is provided with a liquid inlet interface 11, and the center of the outlet cover 3 is provided with a liquid outlet interface 32. In addition, the outlet cover 3 is also provided with a backflow interface 31. The filter core 2 is internally provided with a folded filter membrane, which has a large filter surface area and is suitable for filtering large volume solutions.

[0026] The side of the filter core 2 close to the outlet cover 3 is provided with an interface end cover 22, and the side of the interface end cover 22 facing the outlet cover 3 is provided with a first protrusion 222 close to the outer edge of the interface end cover 22. The outlet cover 3 is provided with a first connecting body 33 corresponding to the first protrusion 222. The surface of the first protrusion 222 and the surface of the first connecting body 33 are both circular annular. The first protrusion 222 and the first connecting body 33 are fixed by welding, which can be achieved by one or more of the following: hot welding, ultrasonic welding and eddy current welding. The surface of the outlet cover 3 on the inner side of the first connecting body 33 is set to be inclined, which prevents the filtered liquid from accumulating on the surface of the outlet cover 3, causing waste. After the filter core 2 and the outlet cover 3 are fixed by welding, the connection part of the filter core 2 and the outlet cover 3, i.e. the first protrusion 222 and the first connecting body 33, are away from the central area and close to the outer edge of the interface end cover 22. The cavity volume outside the first protrusion 222 and the first connecting body 33 is significantly reduced compared to the cavity volume in the central area of the interface end cover 22. Therefore, the dead volume of the filter at this place is greatly reduced, more liquid can enter the filter core 2 for filtration, reducing liquid waste, thereby reducing the economic loss of the user and improving the filtering economy.

[0027] In actual operation, the liquid enters from the liquid inlet interface 11 of the filter shell 1. Since the shell 21 of the filter core 2 is provided with a plurality of liquid inlet through holes 211 for communication with the flow cavity, the liquid enters the inside of the filter core 2 along the liquid inlet through holes 211 for filtration. The filtered filtrate is discharged outward through the liquid outlet through hole 221 of the interface end cover 22 and the liquid outlet interface 32 of the outlet cover 3. In addition, a small amount of liquid remains between the filter shell 1 and the filter core 2, which can be discharged from this part of liquid or recycled by opening the backflow interface 31.

[0028] Embodiment 2

[0029] The difference between embodiment 2 and embodiment 1 is that Figure 3 , Figure 4As shown, the interface end cap 22 has a liquid outlet hole 221 in its central area. The interface end cap 22 has a second protrusion 223 around the liquid outlet hole 221. The outlet cap 3 has a second connector 35 corresponding to the second protrusion 223. Both the second protrusion 223 and the second connector 35 are annular in shape. The second protrusion 223 and the second connector 35 are fixed by welding. The welding can be achieved through one or more of thermal welding, ultrasonic welding, and eddy current welding. The first connector 33 and the second connector 35 protrude from the plane of the outlet cap 3. At least one side of the first connector 33 and the second connector 35 has a clearance gap. In this embodiment, the outer side of the first connector 33 has a clearance gap, and a clearance gap is provided between the first connector 33 and the second connector 35. The liquid outlet hole 221, located inside the second connector 35, also forms an equivalent clearance gap, thus facilitating the heater to heat and weld the connection.

[0030] The first protrusion 222 and the first connector 33 connect the outer edge area of ​​the filter element 2 and the outlet cover 3. The second protrusion 223 and the second connector 35 also fix the central area of ​​the filter element 2 and the outlet cover 3, further improving the connection stability between the filter element 2 and the outlet cover 3. In particular, when the flow rate is large, it can effectively suppress the swaying and vibration of the filter element 2 relative to the outlet cover 3, which is conducive to improving the filtration stability.

[0031] Example 3

[0032] The difference between Example 3 and Example 2 is that, as Figure 5 As shown, the outlet cap 3 has a third protrusion 36 on the outer periphery of the first connector 33, and the housing 21 of the filter element 2 has a liquid inlet hole 211. The top surface of the third protrusion 36 is not higher than the liquid inlet hole 211a closest to the outlet cap 3 on the housing 21. In this embodiment, the top surface of the third protrusion 36 is at the same height as the bottom surface of the liquid inlet hole 211a closest to the outlet cap 3 on the housing 21, so that the third protrusion 36 will not block the liquid inlet hole 211, thereby further reducing the dead volume inside the filter while ensuring that the liquid inlet efficiency is not affected. The presence of the third protrusion 36 can increase the space between the filter element 2 and the filter housing 1 above the third protrusion 36, thereby improving the filtration efficiency.

[0033] The smaller the fit clearance between the third protrusion 36 and the housing 21 of the filter element 2, the smaller the corresponding dead volume will be. The fit clearance between the third protrusion 36 and the housing of the filter element 2 is 0.2-2mm, which ensures that the housing 21 of the filter element 2 does not interfere with the third protrusion 36 during the welding process and improves the welding quality.

[0034] Example 4

[0035] The difference between Example 4 and Example 2 is that, as Figure 6As shown, the first connecting body 33 and the second connecting body 35 are recessed in the plane of the outlet cover 3, and the outlet cover 3 is provided with an outlet cover protrusion 37 between the first connecting body 33 and the second connecting body 35, the outlet cover protrusion 37 is shaped to match the interface end cover 22, which can improve the support and positioning performance of the outlet cover 3 for the interface end cover 22 of the filter element 2. The outlet cover 3 is provided with a backflow interface 31, and the interface end cover is provided with a groove communicating the backflow interface 31 and the flow-through cavity, thereby facilitating the discharge or recycling of residual liquid after filtration is completed.

[0036] At least one side of the first connecting body 33 and the second connecting body 35 is provided with a clearance, in this embodiment, the inner and outer sides of the first connecting body 33 and the outer side of the second connecting body 35 are provided with clearances, and the outlet liquid through hole 221 located on the inner side of the second connecting body 35 also forms an equivalent clearance, thereby facilitating the heating and welding of the connecting part by the heater.

[0037] The above has carried on the detailed introduction to the embodiment of the utility model, the principle and the implementation mode of the utility model have been set forth in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method of the utility model and its core thought; simultaneously, for the technical personnel in the art, according to the thought of the utility model, in specific implementation mode and application range will have the change, the above-mentioned, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A high-economy bag filter, comprising a filter housing (1), an outlet cover (3) and a filter core (2), the filter core (2) being located in a flow passage cavity formed by the filter housing (1) and the outlet cover (3), and an interface end cover (22) being arranged on the side of the filter core (2) close to the outlet cover (3), characterized in that, The interface end cover (22) is provided with a first protrusion (222) on the side facing the outlet cover (3), the first protrusion (222) is close to the outer edge of the interface end cover (22), the outlet cover (3) is provided with a first connecting body (33) corresponding to the first protrusion (222), and the first protrusion (222) and the first connecting body (33) are connected and fixed.

2. A high economy bladder filter according to claim 1, characterized in that, The central region of the interface end cover (22) is provided with a liquid outlet through hole (221), the interface end cover (22) is provided with a second protrusion (223) outside the periphery of the liquid outlet through hole (221), the outlet cover (3) is provided with a second connecting body (35) corresponding to the second protrusion (223), and the second protrusion (223) and the second connecting body (35) are connected and fixed.

3. A high economy bladder filter according to claim 2, characterized in that, The first connecting body (33) and the second connecting body (35) protrude from the plane of the outlet cover (3), and at least one side of the first connecting body (33) and the second connecting body (35) is provided with a clearance.

4. A high economy bladder filter according to claim 1, characterized in that, The outlet cover (3) is provided with a third protrusion (36) outside the periphery of the first connecting body (33), the shell (21) of the filter element (2) is provided with a liquid inlet through hole (211), and the top surface of the third protrusion (36) is not higher than the liquid inlet through hole of the shell (21) closest to the outlet cover.

5. A high economy bladder filter according to claim 4, characterized in that, The cooperation gap between the third protrusion (36) and the shell (21) of the filter element (2) is 0.2-2mm.

6. A high economy bladder filter according to claim 2, wherein, The first connecting body (33) and the second connecting body (35) are recessed in the plane of the outlet cover (3), and at least one side of the first connecting body (33) and the second connecting body (35) is provided with a clearance.

7. A high economy bladder filter according to claim 6, characterized in that The outlet cover (3) is provided with an outlet cover protrusion (37) between the first connecting body (33) and the second connecting body (35), and the outlet cover protrusion (37) is shaped to match the interface end cover (22).

8. A high economy bladder filter according to claim 1, characterized in that, The outlet cover (3) is provided with a backflow interface (31), and the interface end cover is provided with a groove communicating the backflow interface (31) and the flow-through cavity.

9. A high economy bladder filter according to claim 1, characterized in that, The outer side region (34) of the outlet cover (3) is connected and fixed with the filter housing (1). And / or, the surface of the outlet cover (3) on the inner side of the first connecting body (33) is provided in an inclined manner.

10. A high economy pocket filter according to claim 1 or 2 or 9, characterized in that, The connection and fixation is achieved by welding.

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