Filter element connecting structure and filter

Abstract

The utility model discloses a filter element connecting structure and a filter, and the filter element connecting structure comprises a base, a first connecting hole is formed in the top end surface of the base, and a base liquid outlet communicated with the first connecting hole is further formed in the base; a plurality of filter element liquid inlet holes are formed in the side wall of the filter element, the bottom of the filter element is positioned in the first connecting hole, and at least part of the side wall of the filter element is contained in the first connecting hole so as to reduce the distance between the filter element liquid inlet hole in the bottommost end of the filter element and the top end face of the base; a filter element liquid outlet is formed in the filter element and is communicated with the filter element liquid inlet hole and the base liquid outlet respectively. The bottom of the filter element is positioned in the first connecting hole, so that the distance between the filter element liquid inlet hole in the bottommost end of the filter element and the top end face of the base is greatly reduced, the volume of a cavity formed between the filter element and the base is remarkably reduced, namely, the dead volume is reduced, more feed liquid can be effectively filtered through the filter element, and the filter efficiency is improved. The recovery rate of the feed liquid is improved, and the feed liquid loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely relates to a filter core connecting structure and filter. BACKGROUND

[0002] The background information provided in this section is merely for the purpose of enhancing the understanding of the present disclosure and does not necessarily constitute prior art.

[0003] Stainless steel filter is widely used in food and beverage processing, chemical industry, pharmaceutical industry and other industries due to its excellent performance and wide applicability. Its main features include low use cost, convenient disassembly and assembly, large membrane filtration area, long service life and the like. These features make it an indispensable component in fluid processing.

[0004] The Chinese utility model patent with the authorization announcement number CN206715554U discloses a stainless steel sterilization filter for compressed air sterilization. When the filter is applied to liquid filtration, the filter core is connected to the filter cartridge through the first flange plate, and the lowest liquid inlet of the filter core is higher than the lowest part of the filter core shell, resulting in a large cavity between the lowest liquid inlet of the filter core and the first flange plate. The volume of the cavity is the dead volume of the stainless steel filter. The volume of the cavity corresponds to the liquid upstream of the filter core, and the liquid in the volume cannot be filtered by the filter core during use. The large dead volume will lose part of the liquid and reduce the recovery rate of the liquid, causing economic losses to the user. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a filter core connecting structure and filter to solve the problem of low liquid recovery rate caused by the large dead volume of the current filter.

[0006] To achieve the above-mentioned purpose, the utility model takes the technical scheme that:

[0007] In the first aspect, the utility model provides a filter core connecting structure, which comprises:

[0008] A base is provided, and a first connecting hole is formed in the top end face of the base. A base liquid outlet is further arranged on the base and communicates with the first connecting hole.

[0009] A filter core is arranged, and a plurality of filter core liquid inlet holes are arranged on the side wall of the filter core. The bottom of the filter core is positioned in the first connecting hole, and at least part of the side wall of the filter core is accommodated in the first connecting hole to reduce the distance between the filter core liquid inlet hole at the bottom end of the filter core and the top end face of the base. A filter core liquid outlet is arranged in the filter core, and the filter core liquid outlet communicates with the filter core liquid inlet hole and the base liquid outlet, respectively.

[0010] The filter core connecting structure has the following beneficial effects:

[0011] The bottom of the filter core is positioned in the first connecting hole, and at least part of the sidewall of the filter core is accommodated in the first connecting hole, so that the distance between the filter core liquid inlet hole at the bottom end of the filter core and the top end surface of the base is greatly reduced, the cavity volume formed between the filter core and the base is significantly reduced, that is, the dead volume is reduced, and thus more liquid can pass through the filter core for effective filtration, the recovery rate of the liquid is improved, and the loss of the liquid is reduced.

[0012] In an optional embodiment, the distance between the filter core liquid inlet hole at the bottom end of the filter core and the top end surface of the base is 0-2 mm.

[0013] The beneficial effect of the above technical solution is that the depth of the first connecting hole is specially set to ensure that the height difference between the lowest filter core liquid inlet hole and the top end surface of the base is as small as possible after the filter core is inserted, so that a large amount of fluid is not left between the lowest filter core liquid inlet hole and the top end surface of the base, and sufficient filtration of the liquid can be ensured. The distance between the filter core liquid inlet hole at the bottom end of the filter core and the top end surface of the base refers to the distance between the bottom edge of the filter core liquid inlet hole and the top end surface of the base.

[0014] In an optional embodiment, a gap of 0.2-1 mm is provided between the filter core shell and the first connecting hole.

[0015] The beneficial effect of the above technical solution is that the gap can reduce the dead volume while ensuring normal installation of the filter core shell.

[0016] In an optional embodiment, the filter core includes a filter core body and a connector provided at the bottom end of the filter core body, and the connector is sealingly inserted and positioned in the first connecting hole.

[0017] The beneficial effect of the above technical solution is that the filter core is divided into a filter core body and a connector connected directly, and the connector is sealingly inserted and positioned in the first connecting hole. This insertion mode ensures the sealed connection between the filter core and the base, and enhances the connection stability and sealing effect of the filter core and the base.

[0018] In an optional embodiment, a clamping rib is provided in the first connecting hole, and at least two clamping ribs are separately and spacedly provided, and a clamping channel is formed between adjacent clamping ribs.

[0019] A corresponding number of clamping protrusions are provided on the outer sidewall of the connector, and the clamping protrusions are clamped and matched in the first connecting hole and limited by the clamping ribs.

[0020] The beneficial effects of the above technical solutions are: the clamping cooperation of the clamping protrusion and the clamping rib ensures the close connection between the filter element and the base, and greatly enhances the stability of the connection. The clamping protrusion passes through the clamping channel and then rotates to the position directly below the clamping rib. This design makes the installation and disassembly process simple and fast. The operator can easily install or disassemble the filter element for cleaning and replacement, thereby reducing maintenance costs and improving work efficiency.

[0021] In an alternative embodiment, the outer ring of the joint is provided with a first sealing ring to enable the joint to be sealingly inserted into the first connecting hole.

[0022] The beneficial effects of the above technical solutions are: the compression deformation of the first sealing ring fills the gap between the joint and the first connecting hole, ensuring that the joint forms a seal when inserted into the first connecting hole, so that the joint can be sealingly inserted into the first connecting hole, thereby achieving the sealing between the filter element and the base. The number of first sealing rings is at least two.

[0023] In an alternative embodiment, the bottom surface of the clamping rib is inclined.

[0024] The beneficial effects of the above technical solutions are: the inclined bottom surface of the clamping rib reduces the resistance of the joint when inserted into the first connecting hole, making it easier for the joint to overcome the resistance of the first sealing ring and smoothly insert into the predetermined position. The joint can further penetrate into the first connecting hole during rotation.

[0025] In an alternative embodiment, the filter element body comprises:

[0026] The filter element housing, the filter element inlet hole is arranged on the side wall of the filter element housing;

[0027] The closed end cover is arranged at the top end of the filter element housing;

[0028] The interface end cover is arranged at the bottom end of the filter element housing, and the filter element outlet is arranged on the interface end cover;

[0029] The central tube is vertically arranged inside the filter element housing, and a plurality of through holes are arranged on the side wall of the central tube. The inside of the central tube is provided with a liquid collecting channel which is connected with the filter element outlet and each through hole respectively. The outer wall of the central tube and the inner wall of the filter element housing form a filter membrane accommodating cavity;

[0030] The filter membrane is arranged in the filter membrane accommodating cavity.

[0031] In an alternative embodiment, the first connecting hole is divided into a first stepped hole, a second stepped hole, a third stepped hole and a fourth stepped hole; the bottom of the filter core shell is positioned in the first stepped hole, the interface end cover is positioned in the first stepped hole and the second stepped hole, and the joint is positioned in the third stepped hole and the fourth stepped hole.

[0032] In an alternative embodiment, a second connecting hole is arranged on the base, the second connecting hole is in communication with the first connecting hole, a liquid outlet pipe is positioned in the second connecting hole, and the liquid outlet of the base is arranged on the liquid outlet pipe.

[0033] In an alternative embodiment, a third connecting hole in communication with the liquid inlet cavity is arranged on the top end face of the base, a liquid inlet pipe is positioned in the third connecting hole, and a first liquid inlet is arranged on the liquid inlet pipe, the first liquid inlet being in communication with the third connecting hole.

[0034] In an alternative embodiment, a fourth connecting hole and a liquid discharge port are arranged on the base, the fourth connecting hole passes through the top end face of the base and is in communication with the liquid inlet cavity, one end of the liquid discharge port is in communication with the fourth connecting hole, the other end of the liquid discharge port is in communication with the atmosphere, and a valve interface is arranged at the position of the liquid discharge port.

[0035] The beneficial effects of the above technical solution are that the arrangement of the valve interface enables an operator to control the opening and closing of the liquid discharge port through an additional external valve, facilitating the discharge of accumulated liquid or gas when needed, while maintaining a sealed state when not needed, preventing external pollutants from entering the filter. The arrangement of the external valve can effectively solve the problem of the accumulation of pollutants in the internal valve of the fourth connecting hole, and the external valve can facilitate the cleaning or replacement of the valve, significantly improving the cleaning effect and efficiency.

[0036] In an alternative embodiment, the inner diameters of the fourth connecting hole and the liquid discharge port are the same, and the inner diameters of the fourth connecting hole and the liquid discharge port are 5-10 mm.

[0037] The beneficial effects of the above technical solution are that it can ensure that the cleaning tool can smoothly enter the interior and clean the interior space, solving the problem of insufficient cleaning caused by the variable diameter in the current design.

[0038] In a second aspect, the utility model provides a filter, which comprises:

[0039] A filter core connecting structure;

[0040] The filter shell is sealed above the base of the filter core connecting structure and covers the periphery of the filter core, and a liquid inlet cavity is formed between the inner wall of the filter shell, the top end surface of the base and the outer wall of the filter core.

[0041] The filter has the following beneficial effects:

[0042] The filter shell is sealed above the base of the filter core connecting structure and covers the periphery of the filter core, and a liquid inlet cavity is formed between the inner wall of the filter shell, the top end surface of the base and the outer wall of the filter core.

[0043] In an alternative embodiment, a second liquid inlet is arranged on the filter shell and communicates with the liquid inlet cavity.

[0044] In addition, an exhaust joint is arranged on the filter shell.

[0045] In an alternative embodiment, a clamping portion is arranged on the side of the base, and a clamp is arranged on the filter shell, the clamp being matched with the clamping portion to facilitate the connection of the filter shell and the base.

[0046] In an alternative embodiment, a second sealing ring is arranged at the position where the base is connected with the filter shell, thereby effectively ensuring the sealing performance of the connection between the base and the filter shell.

[0047] In an alternative embodiment, the material of the filter shell and the base is stainless steel, and mirror-polished surfaces are arranged on the inner and outer surfaces of the filter shell and the base. The mirror-polished surfaces of the stainless steel are formed by high-precision mechanical polishing, so that there is no parasitic bacteria dead angle, and the extremely high surface finish is also conducive to the flushing and cleaning process of the entire stainless steel filter.

[0048] In an alternative embodiment, a support frame is arranged at the bottom of the base. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0050] Figure 1 The cross-sectional view of the filter core connecting structure provided by the present application is shown in the drawings.

[0051] Figure 2 A sectional view of the filter core in the filter core connecting structure provided by the utility model;

[0052] Figure 3 A sectional view of the base in the filter core connecting structure provided by the utility model;

[0053] Figure 4 A front view of the base connecting support frame in the filter core connecting structure provided by the utility model;

[0054] Figure 5 A bottom view of the base connecting support frame in the filter core connecting structure provided by the utility model;

[0055] Figure 6 A top view of the base connecting support frame in the filter core connecting structure provided by the utility model;

[0056] Figure 7 A sectional view of the base connecting support frame in the filter core connecting structure provided by the utility model;

[0057] Figure 8 A sectional view of the filter core main body in the filter core connecting structure provided by the utility model;

[0058] Figure 9 A structural schematic view of the filter provided by the utility model.

[0059] Reference signs:

[0060] 1, filter core, 11, filter core shell, 111, filter core liquid inlet hole, 12, center cylinder, 121, through hole, 122, liquid collecting channel, 13, joint, 131, clamping protrusion, 14, closed end cover, 15, interface end cover, 16, filter membrane;

[0061] 2, base, 21, first connecting hole, 211, first stepped hole, 212, second stepped hole, 213, third stepped hole, 214, fourth stepped hole, 215, clamping rib, 22, second connecting hole, 23, third connecting hole, 24, liquid inlet pipe, 241, first liquid inlet, 25, liquid outlet pipe, 251, base liquid outlet, 26, clamping part, 27, second sealing ring, 28, fourth connecting hole, 29, valve interface, 210, liquid discharge port;

[0062] 3, filter shell, 31, exhaust joint, 32, second liquid inlet, 33, clamp;

[0063] 4, support frame. DETAILED DESCRIPTION

[0064] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0065] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, elements, components, and / or integers, but do not preclude the presence or addition of one or more other features, elements, components, and / or integers.

[0066] Although the terms first, second, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numeric terms when used herein do not imply a sequence or order to the associated elements, but are to be interpreted as names. In addition, in the description of the present application, unless otherwise specifically stated and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In order to facilitate the description, spatial relative terms can be used herein to describe the relationship of one element or feature to another element or feature as shown in the drawings, such as "front", "back", "middle", "inner", "longitudinal", "transverse", "side", "vertical", "outer" and the like. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation in addition to the orientation depicted in the drawings. For example, if the mechanism in the drawing is turned over, the element described as "below" or "under" the other element or feature will then be oriented "above" or "over" the other element or feature. Therefore, the example term "below" can include both upward and downward orientations. The mechanism can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0068] Stainless steel filter is widely used in food and beverage processing, chemical industry, pharmaceutical industry and other industries due to its excellent performance and wide applicability. Its main features include low cost, convenient disassembly and assembly, large membrane filtration area, long service life and the like. These features make it an indispensable component in fluid processing.

[0069] The utility model discloses a stainless steel filter for compressed air sterilization discloses a kind of for compressed air sterilization's stainless steel sterilization filter, when being applied to liquid filtration, because the filter element of the filter is connected on filter drum by first flange, the lowest liquid inlet of filter element is higher than the lowest of filter element shell, resulting in that there is a large amount of cavity between the lowest liquid inlet of filter element and first flange, the cavity volume is the dead volume of stainless steel filter.The volume corresponding to the part of feed liquid is located in the upstream of filter element, and in use process, a large amount of fluid cannot be filtered in the space between the lowest liquid inlet of filter element and first flange, can only be discharged through drain port in the filtration process.The space of dead volume is large, and the part of feed liquid is lost, reduces the recovery rate of feed liquid, and brings economic loss to user.

[0070] Therefore, the utility model discloses first connecting hole is set on the top end face of base, and the bottom of filter element is positioned in first connecting hole, so that the spacing between the filter element liquid inlet hole of the bottom end of filter element 1 and the top end face of base is greatly reduced, and the dead volume formed between filter element and base is significantly reduced.

[0071] In addition, the diameter of the filter drum is smaller than the diameter of the first flange, so that there is a large space between the filter drum and the first flange, and the feed liquid in the space cannot be filtered, resulting in loss of feed liquid.

[0072] Therefore, the utility model discloses that filter housing is sealingly arranged above the base of filter element connecting structure and covers the periphery of filter element, so that there is no dead volume between the filter housing and the base, and the feed liquid can be effectively filtered.

[0073] The specific embodiments of the utility model will be described in detail below in combination with the filter element connecting structure of the first aspect of the utility model and the filter of the second aspect of the utility model.

[0074] According to the embodiments of the utility model, in the first aspect, a filter element connecting structure is provided, which is combined with Figures 1 to 8As shown, it comprises a base 2 and a filter core 1. The top end surface of the base 2 is provided with a first connecting hole 21, and the base 2 is further provided with a base liquid outlet 251 in communication with the first connecting hole 21. The filter core 1 is internally provided with a filter core liquid outlet in communication with the filter core liquid inlet hole 111 and the base liquid outlet 251 respectively. The sidewall of the filter core 1 is provided with a plurality of filter core liquid inlet holes 111, the bottom of the filter core 1 is positioned in the first connecting hole 21, and at least part of the sidewall of the filter core 1 is accommodated in the first connecting hole 21 to reduce the distance between the filter core liquid inlet hole 111 at the bottom end of the filter core 1 and the top end surface of the base 2.

[0075] It should be noted that the top end surface of the base 2 is a horizontal plane.

[0076] The above filter core connecting structure positions the bottom of the filter core 1 in the first connecting hole 21, and at least part of the sidewall of the filter core is accommodated in the first connecting hole 21, so that the distance between the filter core liquid inlet hole 111 at the bottom end of the filter core 1 and the top end surface of the base 2 is greatly reduced, the volume of the cavity formed between the filter core 1 and the base 2 is significantly reduced, i.e. the dead volume is reduced, and thus more liquid can pass through the filter core 1 for effective filtration, the recovery rate of the liquid is improved, and the loss of the liquid is reduced.

[0077] The sidewall of the filter core 1 is provided with a plurality of filter core liquid inlet holes 111, and the filter core liquid outlet is in communication with the filter core liquid inlet hole 111 and the base liquid outlet 251, so that the liquid can enter the filter core from multiple directions, the filtration area is increased, and the filtration efficiency is improved. At the same time, the communication design of the filter core liquid outlet and the base liquid outlet 251 ensures that the filtered liquid can be smoothly discharged, and the filtration resistance is reduced.

[0078] In some embodiments, the filter core liquid inlet hole 111 at the bottom end of the filter core 1 is 0-2mm higher than the top end surface of the base 2. In this embodiment, the depth of the first connecting hole 21 is specially set to ensure that the height difference between the lowest filter core liquid inlet hole 111 and the top end surface of the base 2 is as small as possible after the filter core 1 is inserted, so that a large amount of fluid is not left between the lowest filter core liquid inlet hole 111 and the top end surface of the base 2, and sufficient filtration of the liquid can be ensured.

[0079] In some embodiments, the filter core 1 comprises a filter core body and a connector 13 arranged at the bottom end of the filter core body, and the bottom of the filter core body and the connector 13 are sealingly inserted and positioned in the first connecting hole 21.

[0080] In the embodiment, the filter element 1 is divided into a filter element body and a connector 13 connected between the filter element body, and the bottom of the filter element body and the connector 13 are sealingly inserted and positioned in the first connecting hole 21. This insertion ensures the close connection between the filter element and the base, and enhances the stability of the connection between the filter element and the base. The filter element body is provided with a filter element liquid inlet hole 111, which can reduce the dead volume between the filter element and the base 2 when the bottom of the filter element body is inserted and positioned in the first connecting hole 21.

[0081] In some embodiments, the first connecting hole 21 is provided with a clamping rib 215. The outer side wall of the connector 13 is provided with a clamping protrusion 131, which is clamped and fitted in the first connecting hole 21 and limited by the clamping rib 215.

[0082] In the embodiment, the clamping protrusion 131 and the clamping rib 215 are clamped and fitted, which ensures the close connection between the filter element 1 and the base 2, and greatly enhances the stability of the connection. Even under high pressure or high flow conditions, the filter element 1 can be effectively prevented from loosening or falling off, and the reliability and safety of the system are improved.

[0083] As a further improved embodiment, the clamping ribs 215 are spaced apart and at least two, and the clamping channels are formed between the adjacent two clamping ribs 215. The clamping protrusions 131 are spaced apart and at least two and correspond to the number of clamping ribs 215. Preferably, the clamping ribs 215 are provided with two and are oppositely arranged on the side wall of the first connecting hole 21, and correspondingly, the connector 13 on the filter element 1 is provided with two clamping protrusions 131. When positioning the connector 13 and the first connecting hole 21, the filter element 1 is vertically installed into the first connecting hole 21, each clamping protrusion 131 passes through each clamping channel, and then the clamping protrusion 131 is rotated to be directly below the clamping rib 215, which is limited by the clamping rib 215, and guides the connector 13 of the filter element 1 to be detachably combined inside the first connecting hole 21.

[0084] In the embodiment, the clamping protrusion 131 passes through the clamping channel and then rotates to be directly below the clamping rib 215, which makes the installation and disassembly process simple and fast. The operator can easily install the filter element 1 in place or disassemble it for cleaning and replacement, which reduces the maintenance cost and improves the work efficiency.

[0085] In some embodiments, the outer ring of the connector 13 is provided with a first sealing ring, which is a rubber ring. The gap between the connector 13 and the first connecting hole 21 is filled by the compression deformation of the first sealing ring, which ensures that the connector 13 forms a seal when inserted into the first connecting hole 21, so that the connector 13 can be sealingly inserted and positioned in the first connecting hole 21, thereby realizing the sealing between the filter element 1 and the base 2, greatly reducing the risk of leakage, ensuring the sealing during the filtration process, and avoiding the loss and pollution of the material liquid due to leakage.

[0086] Due to the first sealing ring arranged on the outer ring of the joint 13, the joint 13 is not easy to completely enter into the first connecting hole 21. In order to solve this problem, in some embodiments, the bottom surface of the clamping rib 215 is inclined, which reduces the resistance of the joint 13 when inserted into the first connecting hole 21, so that the joint 13 can more easily overcome the resistance of the first sealing ring and smoothly insert into the predetermined position. This can make the joint 13 further enter into the first connecting hole 21 during rotation.

[0087] In some embodiments, the filter element body includes a filter element shell 11, a closed end cover 14, an interface end cover 15, a central cylinder 12 and a filter membrane 16. The filter element shell 11 is arranged in a cylindrical structure, and the filter element inlet hole 111 is arranged on the side wall of the filter element shell 11. The closed end cover 14 is a closed structure, and the closed end cover 14 is arranged at the top end of the filter element shell 11. The interface end cover 15 is arranged at the bottom end of the filter element shell 11, and the filter element outlet is arranged on the interface end cover 15, and the interface end cover 15 is welded and fixed with the joint 13. The central cylinder 12 is vertically arranged inside the filter element shell 11, and a plurality of through holes 121 are arranged on the side wall of the central cylinder 12. The inside of the central cylinder 12 is arranged as a liquid collecting channel 122 which is respectively communicated with the filter element outlet and each through hole 121. The outer wall of the central cylinder 12 and the inner wall of the filter element shell 11 form a filter membrane accommodating cavity. The filter membrane 16 is arranged in the filter membrane accommodating cavity, and the filter membrane 16 is a folded filter membrane.

[0088] In this embodiment, the feed liquid can enter the filter membrane accommodating cavity from the filter element inlet hole 111 on the filter element shell 11, pass through the filter membrane 16, enter the liquid collecting channel 122 through the through hole 121 on the central cylinder 12, and then be transmitted to the filter element outlet through the liquid collecting channel 122, and finally be discharged.

[0089] In some embodiments, the first connecting hole 21 is divided into a first stepped hole 211, a second stepped hole 212, a third stepped hole 213 and a fourth stepped hole 214. The bottom of the filter element shell 11 is positioned in the first stepped hole 211, the interface end cover 15 is positioned in the first stepped hole 211 and the second stepped hole 212, and the joint 13 is positioned in the third stepped hole 213 and the fourth stepped hole 214. In this embodiment, the first connecting hole 21 is divided into a plurality of stepped holes, and each component (filter element shell 11, interface end cover 15, joint 13) is positioned in a different stepped hole, which ensures that each component can be accurately positioned during installation, reduces assembly errors, and improves the accuracy and reliability of the overall structure.

[0090] The smaller the gap between the side wall of the first connecting hole 21 and the filter core shell 11, the smaller the retention volume will be. However, in order to ensure that the filter core shell 11 does not interfere with the first connecting hole 21 during the plugging process, a minimum safety gap is set, and the gap d between the filter core shell 11 and the first connecting hole 21 is set to 0.2-1mm, which can reduce the retention volume while ensuring the normal installation of the filter core shell 11.

[0091] In some embodiments, a second connecting hole 22 is arranged on the base 2, the second connecting hole 22 is in communication with the first connecting hole 21, and a liquid outlet pipe 25 is positioned in the second connecting hole 22. A base liquid outlet 251 is arranged on the liquid outlet pipe 25.

[0092] In some embodiments, a third connecting hole 23 in communication with the liquid inlet cavity is arranged on the top end surface of the base 2, a liquid inlet pipe 24 is positioned in the third connecting hole 23, a first liquid inlet 241 is arranged on the liquid inlet pipe 24, and the first liquid inlet 241 is in communication with the third connecting hole 23. In this embodiment, the third connecting hole 23 is arranged to facilitate the positioning of the liquid inlet pipe 24. An internal thread can also be arranged in the joint 13, and an external thread connection part is arranged at the top end of the liquid inlet pipe 24. The external thread connection part of the liquid inlet pipe 24 is screwed to the inside of the joint 13.

[0093] In some embodiments, a fourth connecting hole 28 and a liquid discharge port 210 are arranged on the base 2, the liquid discharge port 210 is vertically and directly arranged, the fourth connecting hole 28 passes through the top end surface of the base 2 and is in communication with the liquid inlet cavity, one end of the liquid discharge port 210 is in communication with the fourth connecting hole 28, and the other end of the liquid discharge port 210 is in communication with the atmosphere.

[0094] The current fourth connecting hole 28 is usually arranged with a necked opening, and a valve is arranged inside the fourth connecting hole 28, which is very difficult to clean. In order to solve this problem, a valve interface 29 is arranged at the position of the liquid discharge port 210 in this embodiment, so that the valve interface 29 is arranged outside the fourth connecting hole 28. The arrangement of the valve interface 29 allows the operator to control the opening and closing of the liquid discharge port 210 through an additional external valve, which facilitates the discharge of accumulated liquid or gas when needed, while maintaining a sealed state when not needed, preventing external pollutants from entering the filter. The arrangement of the external valve can effectively solve the problem of accumulation of pollutants inside the internal valve in the fourth connecting hole. The external valve can facilitate cleaning or replacement of the valve, and the cleaning effect and efficiency are significantly improved. The external valve includes a ball valve, a butterfly valve, or a plug valve, which can be selected according to actual conditions.

[0095] In order to reduce the dead volume in the fourth connecting hole 28 and the liquid discharge port 210, and at the same time there is no need for a large amount of liquid to flow in the liquid discharge port, the inner diameter of the fourth connecting hole 28 is relatively small, generally less than one tenth of the inner diameters of the other connecting holes. However, the liquid in the fourth connecting hole 28 and the liquid discharge port hardly flows, and too small inner hole diameter will cause the particles in the fluid to settle in the middle, which is very difficult to clean. Based on this, in some embodiments, the inner diameters of the fourth connecting hole 28 and the liquid discharge port are the same, and the inner diameters of the fourth connecting hole 28 and the liquid discharge port are 5-10mm. The design of the same inner diameter of the fourth connecting hole 28 and the liquid discharge port and the minimum inner diameter of 5mm can ensure that the cleaning tool can smoothly enter the inside and clean the inside space completely, solving the problem of insufficient cleaning caused by the variable diameter in the current design.

[0096] According to the embodiments of the utility model, the second aspect provides a filter, which is combined with Figures 1 to 9 As shown in the figure, it comprises a filter core connecting structure and a filter shell 3. The filter shell 3 is sealingly arranged above the base 2 of the filter core connecting structure and covers the periphery of the filter core 1, and the inner wall of the filter shell 3, the top end surface of the base 2 and the outer wall of the filter core 1 form a liquid inlet cavity. The filter shell 3 and / or the base 2 is provided with a liquid inlet, and the liquid inlet is communicated with the liquid inlet cavity.

[0097] The above filter, because the filter shell 3 is sealingly arranged above the base 2 of the filter core connecting structure and covers the periphery of the filter core 1, there will be no dead volume between the filter shell 3 and the base 2, further reducing the space of the dead volume, ensuring that the liquid can be effectively filtered.

[0098] In some embodiments, the filter shell 3 is provided with a second liquid inlet 32 communicated with the liquid inlet cavity. More specifically, the second liquid inlet 32 is arranged at the top end of the filter shell 3, and the liquid entering from the second liquid inlet 32 enters the liquid inlet cavity and then enters the filter core 1 from the side for filtration.

[0099] In some embodiments, the filter shell 3 is provided with an exhaust joint 31, which can exhaust the gas inside the filter shell 3.

[0100] In some embodiments, the side of the base 2 is provided with a clamping part 26, and the filter shell 3 is provided with a clamp 33, and the clamp 33 is matched with the clamping part 26, so that the connection of the filter shell 3 and the base 2 is very convenient.

[0101] In some embodiments, the position where the base 2 and the filter shell 3 are connected is provided with a second sealing ring 27, which effectively ensures the sealing performance of the connection between the base 2 and the filter shell 3.

[0102] In some embodiments, the filter cartridge shell 11, the base 2 and the filter shell 3 are made of 304 or 316L stainless steel. The stainless steel material is mild and safe, and can meet the filtering requirements of fluids with different viscosities and even corrosive fluids.

[0103] In some embodiments, the inner and outer surfaces of the filter shell 3 and the base 2 are polished to have a mirror finish. The inner and outer surfaces of the stainless steel are polished to have a mirror finish by high-precision mechanical polishing, so as to achieve no parasitic bacteria dead angle and high surface finish, which is also beneficial to the flushing and cleaning process of the entire stainless steel filter.

[0104] In some embodiments, the bottom of the base 2 is provided with a support frame 4 for supporting the entire filter. After the base 2 and the filter shell 3 are sealingly connected by the second sealing ring and the clamp around the periphery, the support frame 4 at the bottom is installed. The support frame 4 can also be integrally arranged with the base 2, so as to form a complete stainless steel filter which can be fixedly placed at a designated position.

[0105] The specific use process of the above filter is as follows:

[0106] The medium (which can be a liquid or a gas) is transported from the first liquid inlet 241 and / or the second liquid inlet 32 into the liquid inlet cavity (which is surrounded by the inner wall of the filter shell 3, the top end surface of the base 2 and the outer wall of the filter cartridge 1). The medium passes into the filter cartridge 1, is filtered by the filter cartridge 1, and is then output from the joint 13, sequentially flows through the first connecting hole 21 and the second connecting hole 22, and is finally discharged through the base liquid outlet 251.

[0107] Obviously, the above embodiments are only examples for clear illustration, and are not intended to limit the embodiments. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A filter cartridge connection structure characterized by comprising: The base (2) is provided with a first connecting hole (21) on the top end surface thereof, and is further provided with a base liquid outlet (251) in communication with the first connecting hole (21). The filter core (1) is provided with a plurality of filter core liquid inlet holes (111) on the side wall thereof, the bottom of the filter core (1) is positioned in the first connecting hole (21), at least part of the side wall of the filter core (1) is accommodated in the first connecting hole (21) to reduce the distance between the filter core liquid inlet hole (111) at the bottom end of the filter core (1) and the top end surface of the base (2), and the inside of the filter core (1) is provided with a filter core liquid outlet in communication with the filter core liquid inlet hole (111) and the base liquid outlet (251) respectively. The filter core liquid inlet hole (111) at the bottom end of the filter core (1) is 0-2 mm higher than the top end surface of the base (2).

2. The filter cartridge connection structure according to claim 1, characterized by And / or, the gap between the side wall of the filter core (1) and the first connecting hole (21) is 0.2-1 mm. The filter core (1) comprises a filter core body and a connector (13) provided at the bottom end of the filter core body, and the connector (13) is sealingly inserted and positioned in the first connecting hole (21).

3. The filter cartridge connection structure according to claim 1, characterized by The first connecting hole (21) is provided with clamping ribs (215), and the clamping ribs (215) are spaced apart and provided with at least two, and a clamping channel is formed between adjacent clamping ribs (215).

4. The filter cartridge connection structure according to claim 3, characterized by The outer side wall of the connector (13) is provided with a corresponding number of clamping protrusions (131), and the clamping protrusions (131) are clamped and matched in the first connecting hole (21) and are limited by the clamping ribs (215). The bottom surface of the clamping rib (215) is an inclined surface.

5. The filter cartridge connection structure according to claim 4, characterized by The top end surface of the base (2) is provided with a third connecting hole (23), the third connecting hole (23) is positioned with a liquid inlet pipe (24), the liquid inlet pipe (24) is provided with a first liquid inlet (241), and the first liquid inlet (241) is in communication with the third connecting hole (23).

6. The filter cartridge connection structure according to any one of claims 1 to 5, characterized in that, The base (2) is provided with a fourth connecting hole (28) and a liquid outlet (210), and the valve interface (29) is arranged at the position of the liquid outlet.

7. The filter cartridge connection structure according to any one of claims 1 to 5, characterized in that, The inner diameters of the fourth connecting hole (28) and the liquid outlet (210) are the same, and the inner diameters of the fourth connecting hole (28) and the liquid outlet (210) are 5-10 mm.

8. The filter cartridge connection structure according to claim 7, characterized by The filter core connecting structure of any one of claims 1-8; 9. A filter characterized by, The filter shell (3) is sealingly arranged above the base (2) of the filter core connecting structure and covers the periphery of the filter core (1), and a liquid inlet cavity is formed between the inner wall of the filter shell (3), the top end surface of the base (2) and the outer wall of the filter core (1). The filter shell (3) is provided with a second liquid inlet (32) in communication with the liquid inlet cavity; And / or, the filter shell (3) is provided with an exhaust connector (31); 10. The filter of claim 9, wherein, And / or, the materials of the filter shell (3) and the base (2) are stainless steel, and the inner and outer surfaces of the filter shell (3) and the base (2) are provided with mirror polished surfaces. ​ ​ And / or, the bottom of the base (2) is provided with a support frame (4).

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