CN115970385A - Capsule filter and preparation method thereof - Google Patents

Abstract

The present invention relates to the technical field of filters, and discloses a capsule filter and a preparation method thereof, at least including the following steps: S1 setting an extruded material holding groove on one side of the first pressing part of the bottom cover of the filter; S2 respectively Heating the second pressing part of the bottom cover of the filter element and the first pressing part of the bottom cover of the filter to a slightly fused state through infrared welding; S3 combining the heated bottom cover of the filter element with the heated The filter bottom cover is bonded to the first press-fit part through the second press-fitting part and pressure-fitted to weld the filter element bottom cover and the filter bottom cover, and the material extruded by welding is used to fill the The extrudate holding tank is described. In the present invention, when the bottom cover of the filter and the bottom cover of the filter element are pressed together, the melted plastic flows to fill the extruded material holding groove, and no inverted groove occurs, which can reduce the risk of mutual contamination of liquids.

Description

Capsule filter and preparation method thereof

technical field

The invention relates to the technical field of filters, in particular to a capsule filter and a preparation method thereof.

Background technique

The capsule filter is also called an integrated filter, which adopts a folded imported filter membrane with a large filtration surface area and is suitable for the filtration of large volume solutions. The capsule filter usually includes a filter top cover, a filter element and a filter bottom cover. The filter element is provided with a filter top cover and a filter bottom cover corresponding to the filter top cover and the filter bottom cover respectively, and the liquid passes through the filter top cover in turn. And the top cover of the filter element flows through the filter element to filter, and then flows out through the bottom cover of the filter element and the bottom cover of the filter element.

Since capsule filters are generally not intended for one-time use, users usually reuse them. At present, the contact surface of the existing capsule filter bottom cover towards the filter element bottom cover is originally set on a plane, but the filter bottom cover needs to be welded with the filter element bottom cover during the preparation process. During the welding process, the hot pressing of the filter bottom cover The plastic melted on the surface will flow to the surroundings, resulting in an inverted groove between the bottom cover of the manufactured capsule filter and the bottom cover of the filter element, and the accumulated liquid will be difficult to discharge during filtration, and the accumulated liquid will be different from that after the replacement mixed liquids to cause contamination.

Contents of the invention

The purpose of the present invention is to design a capsule filter and its preparation method, so that the bottom cover of the filter and the bottom cover of the filter element will not be inverted after welding, so as to avoid pollution.

In order to achieve the above object, the invention provides a preparation method of a capsule filter, at least comprising the following steps:

S1 arrange the extruded material holding groove on one side of the first pressing part of the filter bottom cover;

S2 respectively heating the second pressing part of the filter element bottom cover and the first pressing part of the filter bottom cover to a slightly fused state by infrared welding;

S3 attaching the heated bottom cover of the filter element to the heated bottom cover of the filter element through the second press-fitting part and the first pressing part and applying pressure to press-fit the bottom cover of the filter element to weld the bottom cover of the filter element With the filter bottom cap, utilize welded extruded material to fill the extrudate holding tank.

Preferably, a liquid outlet channel is opened on the bottom cover of the filter, the first press-fit part is arranged around the liquid outlet channel, and the extruded material holding groove ring is arranged at the first press-fit part near the One side of the outlet channel.

Preferably, the specific operation steps of S2 are: using infrared welding to heat the second press-fit part protruding downward from the bottom cover of the filter element and the first press-fit part protruding upward from the bottom cover of the filter element. part, the heating temperature is 220°C to 230°C.

Preferably, the specific operation steps of S3 are: using a servo motor or a servo electric cylinder to control the heated bottom cover of the filter element to be coaxially attached to the heated bottom cover of the filter, and applying pressure to make the two or welding.

Preferably, when the S3 applies pressure to weld the bottom cover of the filter element and the bottom cover of the filter, the melted material pressed to the first press-fit part and/or the second press-fit part is extruded and Fill the extrudate holding tank.

Preferably, the applied pressure is 0.5-1 MPa.

Preferably, the overall axial length of the bottom cover of the filter and the bottom cover of the filter element is shortened by 0.5-1.2mm after press-fit connection.

The present invention also provides a capsule filter, comprising: a housing, a filter bottom cover, a filter top cover, a filter element, a filter element top cover, and a filter element bottom cover; the filter top cover and the filter bottom cover are respectively Sealed on the upper end of the housing and the lower end of the housing, the filter top cover is provided with a liquid inlet channel, the filter bottom cover is provided with a liquid outlet channel, and the housing is sleeved on the filter element A flow cavity is formed by enclosing the outer wall of the filter element, the filter element top cover covers the upper end of the filter element, the filter element bottom cover covers the lower end of the filter element, and the filter element bottom cover covers A liquid outlet is opened; the liquid inlet channel communicates with the interior of the filter element through the flow cavity, and the interior of the filter element communicates with the liquid outlet channel through the liquid outlet;

The side of the bottom cover of the filter facing the bottom cover of the filter core is protruded with a first pressing part arranged around the liquid outlet channel, and the bottom cover ring of the filter core is protruded with a side of the bottom cover of the filter core. The second pressing part provided at the liquid outlet; wherein, there is a state to be welded and a state after welding between the bottom cover of the filter and the bottom cover of the filter element, and in the state to be welded, the bottom cover of the filter The ring is provided with an extruded material containing groove, and the extruded material containing groove is attached to the side of the first pressing part close to the liquid outlet channel; in the state after welding, the filter bottom cover and the The bottom cover of the filter element is welded through the first pressing part and the second pressing part, and an extrudate is formed to fill the extrudate containing groove.

Preferably, it also includes an outer sleeve and an inner sleeve, the outer casing, the outer sleeve, the filter element and the inner sleeve are set sequentially from outside to inside, and the filter element top cover is sealed on the The upper end of the outer sleeve and the inner sleeve, the bottom cover of the filter element is covered on the lower end of the outer sleeve and the inner sleeve, the wall of the outer sleeve and the inner sleeve The walls are provided with through holes, the outer wall of the outer sleeve and the housing are enclosed to define the flow cavity, and the inside of the filter element is communicated with the liquid outlet through the inner sleeve.

Preferably, an exhaust channel is opened on the top cover of the filter and/or a return channel is opened on the bottom cover of the filter, and both the exhaust channel and the return channel communicate with the flow cavity.

Compared with the prior art, a capsule filter and its preparation method according to the embodiment of the present invention have the following beneficial effects:

The bottom cover of the capsule filter in the embodiment of the present invention is designed with an extruded material holding groove. When the filter bottom cover and the filter element bottom cover are pressed together, the melted plastic flows and fills the extruded material holding groove, and there is no inverted groove, which can Reduces the risk of mutual contamination of liquids.

Description of drawings

Fig. 1 is an axonometric view of a capsule filter according to an embodiment of the present invention;

Fig. 2 is the top view of capsule filter of the embodiment of the present invention;

Fig. 3 is the sectional view of A-A among Fig. 2;

Fig. 4 is a cross-sectional view of a capsule filter according to an embodiment of the present invention;

5 is an exploded schematic diagram of a capsule filter according to an embodiment of the present invention;

6 is a structural schematic diagram of a filter bottom cover and a filter element bottom cover in a capsule filter according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of the connection between the bottom cover of the filter and the bottom cover of the filter element in the state where the capsule filter of the embodiment of the present invention is to be welded;

Fig. 8 is a schematic diagram of connection between the bottom cover of the filter and the bottom cover of the filter element in the welded state of the capsule filter according to the embodiment of the present invention.

In the figure, 1. Shell; 2. Filter top cover; 21. Liquid inlet channel; 22. Exhaust channel; 3. Filter bottom cover; 31. Liquid outlet channel; 32. First pressing part; 33. Extrusion 34. Return channel; 4. Filter element; 5. Filter element top cover; 6. Filter element bottom cover; 61. Liquid outlet; 62. Second pressing part; 7. Outer sleeve; 71. Through hole ; 8, the inner sleeve; 9, the flow chamber.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the It should not be construed as limiting the invention that a device or element must have a particular orientation, be constructed, and operate in a particular orientation.

In the description of the present invention, it should be understood that the terms "connected", "connected", and "fixed" used in the present invention should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrate; can be mechanical connection, can also be welded connection; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish information of the same type from each other. For example, "first" information may also be referred to as "second" information without departing from the scope of the present invention, and similarly, "second" information may also be referred to as "first" information.

As shown in Figure 1, Figure 2 and Figure 3, a method for preparing a capsule filter in a preferred embodiment of the present invention at least includes the following steps:

S1 Set an extrudate holding groove 33 on one side of the first pressing part 32 of the filter bottom cover 3;

S2 respectively heating the second pressing portion 62 of the filter element bottom cover 6 and the first pressing portion 32 of the filter bottom cover 3 to a slightly melted state by infrared welding;

S3 attach the heated filter element bottom cover 6 and the heated filter bottom cover 3 to the first press-fit part 32 through the second press-fit part 62 and apply pressure to press-fit, so as to weld the The filter element bottom cover 6 and the filter bottom cover 3 are welded and extruded to fill the extruded material containing groove 33 .

At present, the first pressing part of the existing filter bottom cover is set on a flat surface. When the filter bottom cover and the filter element bottom cover are welded, the plastic melted in the first pressing part flows to both sides under the action of the pressing force to form an inverted groove. When the liquid is filtered in the capsule filter, it is easy to accumulate in the deep inverted tank and it is difficult to discharge. When the type of filtered liquid is replaced later, the accumulated liquid will mix with the replaced filtered liquid, causing pollution.

Therefore, in this embodiment, an extruded material holding groove 33 is arranged on the side of the first pressing part 32 of the filter bottom cover 3, and when the filter element bottom cover 6 and the filter bottom cover 3 are welded and pressed together, the melted plastic is in the pressure of the pressing force. Moving under the action, the extrudate containing groove 33 can bring the guiding function, and the first pressing part 32 moves toward the extrudate containing groove 33 and fills it, avoiding the occurrence of inverted grooves and reducing the possibility of liquid mixed pollution.

Wherein, the filter element bottom cover 6 and the filter bottom cover 3 are usually made of the same material, such as PP plastic.

Further, as shown in FIG. 4 , the filter bottom cover 3 is provided with a liquid outlet channel 31 , the first pressing portion 32 is arranged around the liquid outlet channel 31 , and the extrudate holding groove 33 is ringed. It is located on the side of the first pressing portion 32 close to the liquid outlet channel 31 . The side of the first pressing part 32 away from the liquid outlet channel 31 is the flow chamber 9, even if an inverted tank is formed, it is more convenient to clean, and it is not easy to accumulate liquid; the side of the first pressing part 32 close to the liquid outlet channel 31 is located in the filter element 4. It is difficult to clean the inside of the filter element 4. Setting the extruded material holding groove 33 on the side close to the liquid outlet channel 31 can prevent the filter bottom cover 3 from forming an inverted groove inside the filter element 4 during the welding process of the filter element bottom cover 6, so it is not easy to use. Accumulated liquids cause mutual contamination between liquids.

Further, the specific operation steps of S2 are: use infrared welding to heat the second pressing part 62 protruding downward of the filter bottom cover 6 and the first pressing part 62 protruding upward of the filter bottom cover 3 . A pressing part 32, the heating temperature is 220°C-230°C. Infrared welding is non-contact welding, which can accurately control the heating of only the protruding pressing part to ensure that the pressing part is not in contact with other parts. It is more precise than the existing contact heating method and will not cause the filter bottom The deformation of the cover 6 and the filter bottom cover 3; and there will be no sol residue, carbonization, decomposition and other phenomena on the surface of the heating plate, which can avoid residues and precipitates that do not meet the technical requirements at the welding position.

Further, the specific operation steps of S3 are: using a servo motor or a servo electric cylinder to control the heated filter element bottom cover 6 and the heated filter bottom cover 3 to be coaxially bonded, and applying pressure for pressing Solder both. The servo motor can control the speed, and the position accuracy is very accurate; the servo electric cylinder also has precise speed, position and thrust control, can accurately adjust the applied pressure, and can also manually adjust the filter element bottom cover 6 and filter bottom cover 3 when pressing Relatively moving positions and precise control of the pressing speed and pressing end point achieve the effect of filling the melted material into the extruded material holding groove 33 and smoothing the surface.

Further, as shown in FIG. 6 , the S3 is press-fitted to the first pressing part 32 and/or the second pressing part 32 when pressure is applied to weld the filter element bottom cover 6 and the filter bottom cover 3 . The melted material of the pressing part 62 is squeezed out and fills up the extruded material receiving groove 33 . After the extruded material holding tank 33 is filled and leveled during welding, the surface of the filter bottom cover 3 facing the filter element bottom cover 6 in the welded state is connected smoothly, without dead corners and grooves, and can be thoroughly cleaned during the cleaning process of the filter element 4. Clean up, there will be no liquid residue, and will not cause residual pollution of the product.

Further, the applied pressure is 0.5-1MPa. If the pressure is too small, the effect of adhesion between the filter element bottom cover 6 and the filter bottom cover 3 cannot be achieved. If the pressure is too high, the filter element bottom cover 6 and its filter bottom cover will be deformed greatly, affecting Use as a whole.

Further, the overall axial length of the filter bottom cover 3 and the filter element bottom cover 6 is shortened by 0.5-1.2mm after press-fit connection. Ensure that the filter bottom cover 3 and the filter element bottom cover 6 have a certain amount of molten material extruded during the pressing, welding and adhesion process, which can fill the extruded material holding tank 33, and at the same time avoid excessive extrusion to cause surface unevenness and grooves The accumulation of liquid, etc. occurs.

As shown in Fig. 5, Fig. 7 and Fig. 8, a capsule filter according to an embodiment of the present invention includes: a housing 1, a filter bottom cover 3, a filter top cover 2, a filter element 4, a filter element top cover 5 and a filter element Bottom cover 6; the filter top cover 2 and the filter bottom cover 3 are respectively sealed on the upper end of the housing 1 and the lower end of the housing 1, and the filter top cover 2 is provided with a liquid inlet channel 21. The bottom cover 3 of the filter is provided with a liquid outlet channel 31, the shell 1 is sleeved on the filter element 4 and forms a flow cavity 9 surrounded by the outer wall of the filter element 4, and the top of the filter element The cover 5 is sealed on the upper end of the filter element 4, the filter element bottom cover 6 is sealed on the lower end of the filter element 4, and the filter element bottom cover 6 is provided with a liquid outlet 61; the liquid inlet channel 21 passes through the The flow chamber 9 is connected to the inside of the filter element 4, and the inside of the filter element 4 is connected to the liquid outlet channel 31 through the liquid outlet 61;

The side of the filter bottom cover 3 facing the filter element bottom cover 6 is protruded with a first pressing part 32 arranged around the liquid outlet channel 31 , and the filter element bottom cover 6 ring faces the filter bottom cover 3 One side is protrudingly provided with a second pressing part 62 arranged around the liquid outlet 61; wherein, the filter bottom cover 3 and the filter element bottom cover 6 have a state to be welded and a state after welding, and the state to be welded state, the upper ring of the filter bottom cover 3 is provided with an extruded material containing groove 33, and the extruded material containing groove 33 is attached to the side of the first pressing part 32 close to the liquid outlet channel 31 In the state after welding, the filter bottom cover 3 and the filter element bottom cover 6 are welded through the first pressing part 32 and the second pressing part 62, and an extrudate is formed to fill the extruded Material holding tank 33.

When the capsule filter is being filtered, the liquid enters the flow chamber 9 from the liquid inlet channel 21. Since the filter element top cover 5 and the filter element bottom cover 6 are closed and set, the liquid in the flow chamber 9 needs to be filtered by the filter element 4 to enter the interior of the filter element 4 and has been filtered. The liquid in the filter element 4 flows out from the liquid outlet 61 of the filter element bottom cover 6 through the liquid outlet channel 31 of the filter bottom cover 3 . The extrudate holding tank 33 is located between the first pressing part 32 and the liquid outlet channel 31, and accommodates the extrudate that melts when the filter bottom cover 3 and the filter element bottom cover 6 are pressed together, so as to prevent the extrudate from causing filtration during pressing. The upper surface of the bottom cover 3 of the device is not smooth, and there are inverted grooves, etc., and it is easy to accumulate liquid during subsequent use, and it will infect each other when changing the filter and changing the type of liquid.

Further, it also includes an outer sleeve 7 and an inner sleeve 8, the casing 1, the outer sleeve 7, the filter element 4 and the inner sleeve 8 are sleeved sequentially from the outside to the inside, and the top of the filter element The cover 5 is sealed on the upper end of the outer sleeve 7 and the inner sleeve 8, the filter element bottom cover 6 is sealed on the lower end of the outer sleeve 7 and the inner sleeve 8, and the outer sleeve Both the cylinder wall of the cylinder 7 and the cylinder wall of the inner sleeve 8 are provided with through holes 71, the outer wall of the outer sleeve 7 and the outer casing 1 are enclosed to define the flow chamber 9, and the filter element 4 The inside of the inner sleeve communicates with the liquid outlet 61 through the inner sleeve 8 . The outer sleeve 7 and the inner sleeve 8 are mainly used to support the filter element 4, and are fixedly connected with the filter element top cover 5 and the filter element bottom cover 6 to prevent liquid from flowing out from the gap between the filter element 4 and the filter element top cover 5 and the filter element bottom cover 6 , the liquid passes through the through hole 71 on the outer sleeve 7 to pass through the filter element 4 and then through the through hole 71 of the inner sleeve 8 to achieve the filtering effect.

Further, the filter top cover 2 is provided with an exhaust passage 22 and/or the filter bottom cover 3 is provided with a return passage 34, and both the exhaust passage 22 and the return passage 34 communicate with the flow chamber 9 . The liquid enters from the filter top cover 2 and fills the flow cavity 9, while the gas in the original space is discharged through the exhaust channel 22 to ensure that there are no air bubbles in the filter. The liquid passes through the outer sleeve 7 from the flow chamber 9 and is filtered by the filter element 4 to obtain filtered liquid. The filtered liquid enters the interior of the filter element 4 and passes through the inner sleeve 8 from the outlet 61 of the filter element bottom cover 6 through the The liquid outlet channel 31 flows out, and the liquid that cannot be filtered by the filter core 4 flows out and collects through the return channel 34 of the filter bottom cover 3 .

To sum up, the embodiment of the present invention provides a capsule filter and its preparation method. By setting the extruded material holding tank 33, controlling the welding temperature, pressing pressure, etc., the first pressing part 32 and the second pressing part The extruded material of 62 fills the extruded material holding tank 33 to ensure a flat surface, so as to solve the problem of welding the traditional filter element bottom cover 6 and the filter bottom cover 3. There will be a problem of residual liquid causing contamination.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method of making a capsule filter, comprising at least the steps of:

s1, arranging an extrusion material accommodating groove at one side of a first pressing part of a filter bottom cover;

s2, respectively heating the second pressing part of the filter element bottom cover and the first pressing part of the filter bottom cover to a slightly-melted state through infrared welding;

s3, the heated filter element bottom cover and the heated filter bottom cover are attached to the first pressing part through the second pressing part and pressed by applying pressure so as to weld the filter element bottom cover and the filter bottom cover, and the extrusion material containing groove is filled with welding extrusion materials.

2. The method as claimed in claim 1, wherein the bottom cover of the filter has a liquid outlet channel, the first pressing portion is disposed around the liquid outlet channel, and the extrudate receiving groove is annularly disposed on a side of the first pressing portion close to the liquid outlet channel.

3. The method for preparing a capsule filter according to claim 1, wherein the specific steps of S2 are: and heating the second pressing part protruding downwards of the filter element bottom cover and the first pressing part protruding upwards of the filter bottom cover by utilizing infrared welding, wherein the heating temperature is 220-230 ℃.

4. The method for preparing a capsule filter according to claim 1, wherein the specific steps of S3 are: and controlling the heated filter element bottom cover to be coaxially attached to the heated filter bottom cover by using a servo motor or a servo electric cylinder, and applying pressure to weld the filter element bottom cover and the heated filter bottom cover.

5. The method of manufacturing a capsule filter according to claim 4, wherein the S3 extrudes and fills the extrusion material accommodating groove with the melted material pressed to the first press part and/or the second press part when the filter element bottom cover and the filter bottom cover are welded by applying pressure.

6. The method of claim 4, wherein the pressure is applied at a pressure of 0.5 to 1MPa.

7. The method of claim 4, wherein the axial length of the filter bottom cap and the filter element bottom cap is reduced by 0.5 to 1.2mm after the press-fitting connection compared to the axial length before the press-fitting connection.

8. A bladder filter, comprising: the filter comprises a shell, a filter bottom cover, a filter top cover, a filter element top cover and a filter element bottom cover; the filter top cover and the filter bottom cover are respectively sealed at the upper end of the shell and the lower end of the shell, the filter top cover is provided with a liquid inlet channel, the filter bottom cover is provided with a liquid outlet channel, the shell is sleeved on the filter element and forms a flow cavity with the outer wall of the filter element in a surrounding manner, the filter element top cover is sealed at the upper end of the filter element, the filter element bottom cover is sealed at the lower end of the filter element, and the filter element bottom cover is provided with a liquid outlet; the liquid inlet channel is communicated to the inside of the filter element through the flow cavity, and the inside of the filter element is communicated to the liquid outlet channel through the liquid outlet;

a first pressing part arranged around the liquid outlet channel is convexly arranged on one surface, facing the filter element bottom cover, of the filter bottom cover, and a second pressing part arranged around the liquid outlet is convexly arranged on one surface, facing the filter bottom cover, of the filter bottom cover ring; the filter bottom cover and the filter element bottom cover are in a state to be welded and a state after welding, and in the state to be welded, an extrusion material accommodating groove is annularly arranged on the filter bottom cover and is attached to one side, close to the liquid outlet channel, of the first pressing part; and in the welded state, the filter bottom cover and the filter element bottom cover are welded through the first pressing part and the second pressing part, and an extruded material is formed to fill the extruded material accommodating groove.

9. The bag filter of claim 8, further comprising an outer sleeve and an inner sleeve, wherein the outer shell, the outer sleeve, the filter element and the inner sleeve are sequentially sleeved from outside to inside, the filter element top cover is sealed at the upper ends of the outer sleeve and the inner sleeve, the filter element bottom cover is sealed at the lower ends of the outer sleeve and the inner sleeve, through holes are formed in the cylinder wall of the outer sleeve and the cylinder wall of the inner sleeve, the outer wall of the outer sleeve and the outer shell are enclosed to define the flow cavity, and the interior of the filter element is communicated with the liquid outlet through the inner sleeve.

10. The capsule filter of claim 8, wherein the filter top cover is provided with an exhaust channel and/or the filter bottom cover is provided with a return channel, and the exhaust channel and the return channel are both communicated with the flow cavity.

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