Filter shell and bag type filter with same

Abstract

The utility model relates to the technical field of bag type filters, in particular to a filter shell and a bag type filter with the same. The filter shell is provided with a first shell body and a second shell body, the first shell body is provided with an annular groove, the second shell body is provided with an annular protruding strip, through a concave-convex embedded joint face structure, the friction force generated after the two shell bodies are buckled can be improved, more friction heat is generated in the rotating friction welding process, deep fusion of the joint face is guaranteed, and the service life of the filter shell is prolonged. The welding quality is very high; the inner material blocking wall and the outer material blocking wall are arranged on the two sides of the opening of the annular groove of the first shell respectively, the material blocking groove is formed between the inner material blocking wall and the outer material blocking wall, materials overflowing during welding can be contained through the design of the material blocking groove, the materials cannot overflow to the inner surface and the outer surface, and therefore the glue overflowing problem does not exist on the appearance.

Description

Technical Field

[0001] The utility model relates to the technical field of capsule filters, and particularly relates to a filter housing and a capsule filter having the same. Background Art

[0002] A capsule filter, also known as an integrated filter, is a filtration device widely used in multiple fields such as medicine, chemical industry, and biological agents. The capsule filter includes a housing and a filter element. Among them, the filter element is a folded filter membrane, which has a relatively large filtration surface area and can improve the filtration efficiency; the housing of the capsule filter is usually made of polypropylene material, and at the same time has good corrosion resistance and high temperature resistance, and can ensure the purity and safety of the filtration process.

[0003] The existing capsule filter housing mainly adopts an upper and lower two-part structure. After the internal components are assembled, the upper and lower two-part structures are welded into a whole by using a rotary friction welding process to ensure that the housing has good sealing performance and structural strength. However, due to the unreasonable design of the welding structure, the quality of the hot melt welding cannot be guaranteed, resulting in relatively low pressure resistance of the housing, affecting the safety of product use and the appearance of the filter due to the problem of glue overflow. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of glue overflow and low pressure resistance of the capsule filter housing in the molding process of the prior art, so as to provide a filter housing and a capsule filter having the same.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a filter housing, which includes a first housing having an annular groove below; a second housing having an annular rib matching with the annular groove above; inner and outer material retaining walls are respectively arranged on two sides of the opening of the annular groove, and a material retaining groove is formed between the inner and outer material retaining walls; the first housing and the second housing are buckled with each other, and at least a part of the annular rib is embedded into the annular groove.

[0007] Optionally, for the filter housing provided by the utility model, the top of the annular rib is embedded into the annular groove, and the base of the annular rib is received in the material retaining groove.

[0008] Optionally, for the filter housing provided by the utility model, the annular groove is an annular trapezoidal groove, and the annular rib is an annular trapezoidal rib.

[0009] Optionally, for the filter housing provided by the present utility model, the width of the material retaining groove is greater than the opening width of the annular groove.

[0010] Optionally, for the filter housing provided by the present utility model, the width of the material retaining groove is greater than the cross-sectional width of the annular rib.

[0011] Optionally, for the filter housing provided by the present utility model, the first housing and the second housing are integrally formed by hot melt welding.

[0012] Optionally, for the filter housing provided by the present utility model, the material retaining groove is an annular material retaining groove.

[0013] Optionally, for the filter housing provided by the present utility model, the first housing is provided with a first interface which communicates with the inner cavity of the first housing; the second housing is provided with a second interface which communicates with the inner cavity of the second housing.

[0014] Optionally, for the filter housing provided by the present utility model, at least one of the first housing and the second housing is provided with an exhaust port.

[0015] The present utility model further provides a bag filter, which includes a filter housing and a filter element disposed in the filter housing; the filter housing is the above-mentioned filter housing.

[0016] The technical solution of the present utility model has the following advantages:

[0017] 1. For the filter housing provided by the present utility model, the first housing has an annular groove and the second housing has an annular rib. Through the engaging surface structure of concave-convex interlocking, the frictional force after the two housings are buckled can be increased, and more frictional heat is generated during rotary friction welding, ensuring deep fusion of the engaging surface and having very high welding quality; on both sides of the opening of the annular groove of the first housing, an inner material retaining wall and an outer material retaining wall are respectively provided, and a material retaining groove is formed between the inner material retaining wall and the outer material retaining wall. The design of this material retaining groove can accommodate the materials overflowing during welding, so that the materials will not overflow to the inner and outer surfaces, and thus there is no problem of glue overflow on the appearance.

[0018] 2. For the filter housing provided by the present utility model, the material retaining groove can accommodate the base of the annular rib. This setting makes it easy for the materials overflowing at the top position of the annular rib to enter the material retaining groove, thus there is no problem with the welding appearance.

[0019] 3. For the filter housing provided by the present utility model, the transverse cross-section of the annular rib is in a trapezoidal structure, and the annular groove is a trapezoidal groove. The contact surface between the two is very large, and the rotary frictional force under the action of pressing fit is very large. As a result, a lot of frictional heat is generated to melt the engaging surface, and a high-strength engaging surface is formed under the action of the axial force. Brief Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the first housing structure of the filter housing provided in the embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the second housing structure of the filter housing provided in the embodiment of the present invention;

[0023] Description of the reference numerals:

[0024] 1 - First housing, 11 - First interface, 12 - Annular trapezoidal groove, 13 - Outer baffle wall, 14 - Inner baffle wall, 15 - First exhaust port, 2 - Second housing, 21 - Second interface, 22 - Annular trapezoidal rib, 23 - Second exhaust port. Detailed Description of the Embodiments

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Embodiment 1

[0029] As Figure 1-2As shown, this embodiment provides a filter housing, which includes a first housing 1 and a second housing 2. In this embodiment, the first housing 1 is an upper housing, and the second housing 2 is a lower housing. Among them, the lower part of the first housing 1 has an annular groove, and the annular groove is preferably an annular trapezoidal groove 12, that is, the cross-section of the annular groove is a trapezoidal structure; the upper part of the second housing 2 has an annular rib that cooperates with the annular groove, and the annular rib is preferably an annular trapezoidal rib 22, that is, the transverse cross-section of the annular rib is a trapezoidal structure; both sides of the opening of the annular groove have an inner material retaining wall 14 and an outer material retaining wall 13, and a material retaining groove is formed between the inner material retaining wall 14 and the outer material retaining wall 13; the first housing 1 and the second housing 2 are buckled with each other, and at least a part of the annular rib is embedded in the annular groove.

[0030] For the filter housing provided in this embodiment, the first housing 1 and the second housing 2 can be selected from thermoplastic materials such as polypropylene, polyethylene, ABS resin, and nylon. The first housing 1 of the filter housing has an annular groove, and the second housing 2 has an annular rib. Through the engaging surface structure of concave-convex interlocking, the frictional force after the two housings are buckled can be increased, and more frictional heat is generated during rotational friction welding, ensuring deep fusion of the engaging surface and having very high welding quality; on both sides of the opening of the annular groove of the first housing 1, an inner material retaining wall 14 and an outer material retaining wall 13 are respectively provided, and an annular material retaining groove is formed between the inner material retaining wall 14 and the outer material retaining wall 13. The design of this material retaining groove can accommodate the materials overflowing during welding, so that the materials will not overflow to the inner and outer surfaces, and thus there is no problem of glue overflow on both the inner and outer sides.

[0031] For the filter housing provided in this embodiment, the transverse cross-section of the annular rib is a trapezoidal structure, and the annular groove is a trapezoidal groove. The contact surface between the two is very large, and the rotational frictional force under the action of tight pressing is very large, thereby generating a lot of frictional heat to melt the engaging surface and forming a high-strength engaging surface under the action of the axial force.

[0032] Optionally, for the filter housing provided in this embodiment, the top of the annular rib is embedded in the annular groove, and the base of the annular rib is received in the material retaining groove, that is, the material retaining groove will wrap the following part of the trapezoidal groove. The material retaining groove in this setting mode can accommodate the base of the annular rib, and this setting mode makes it easy for the materials overflowing at the top position of the annular rib to enter the material retaining groove, so there is no problem with the welding appearance.

[0033] Optionally, for the filter housing provided in this embodiment, the width of the material retaining groove is greater than the opening width of the annular groove; and the width of the material retaining groove is greater than the cross-sectional width of the annular rib. This setting enables a gap between the material retaining groove and the annular rib when the first housing 1 and the second housing 2 are snapped together. During hot melt welding, this gap can serve as a receiving space for the overflowing material, thus preventing the material from spilling out of the housing.

[0034] For the filter housing provided in this embodiment, the first housing 1 is provided with a first interface 11 that communicates with the inner cavity of the first housing 1; the second housing 2 is provided with a second interface 21 that communicates with the inner cavity of the second housing. The first interface 11 and the second interface 21 can serve as the inlet and outlet of the filter. Optionally, at least one of the first housing and the second housing is provided with an exhaust port. Specifically, as Figure 1 and Figure 2 shown, the first housing 1 of the filter housing provided in this embodiment is provided with a first exhaust port 15, and the second housing 2 is provided with a second exhaust port 23.

[0035] Embodiment 2

[0036] This embodiment provides a bag filter, which includes the filter housing as described in Embodiment 1 and a filter element disposed within the filter housing.

[0037] During the forming process of the bag filter, the filter element is placed into the lower housing, and the upper and lower housings are aligned and joined. Then, it is formed by rotary friction welding. The rotary friction welding process is as follows: adjust the compressed air pressure of the welding machine to 10 kgf / cm 2 , press and position the upper and lower housings, then adjust the rotation speed and the number of rotation cycles of the welding machine, and start the welding machine. At this time, there is a large rotational frictional force between the upper and lower housings. The large amount of rotational frictional heat generated thereby melts the surfaces of the annular ribs of the upper housing and the annular grooves of the lower housing. The joining surfaces of the upper and lower housings melt and bond into a whole. The excess material overflows into the material retaining groove. After the welding machine stops and cools down, the welding of the upper and lower housings is completed, thus forming the bag filter. The parameter adjustment of the welding machine is subject to the requirements of the specific welding process.

[0038] The bladder filter provided in this embodiment, due to the engaging surface structure with concave and convex interlocking of the upper and lower shells of its outer shell, can increase the friction force after the two shells are buckled, and generate more frictional heat during rotary friction welding to ensure deep fusion of the engaging surface, with very high welding quality; on both sides of the opening of the annular groove of the upper shell, an inner material retaining wall and an outer material retaining wall are respectively provided, and an annular material retaining groove is formed between the inner material retaining wall and the outer material retaining wall. The design of this material retaining groove can accommodate the materials overflowing during welding, so that the materials will not overflow to the inner and outer surfaces, and thus there is no problem of glue overflow on both the inner and outer sides in terms of appearance.

[0039] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the creation of the present utility model.

Claims

1. A filter housing, characterized in that: include: A first shell, wherein the first shell has an annular groove at the bottom; A second shell, wherein an annular convex strip matching with the annular groove is provided on the upper portion of the second shell; The two sides of the annular groove opening are respectively provided with an inner material retaining wall and an outer material retaining wall, and a material retaining groove is formed between the inner material retaining wall and the outer material retaining wall; The first shell and the second shell are buckled with each other, and at least a portion of the annular convex strip is embedded in the annular groove.

2. The filter housing according to claim 1, characterized in that The top of the annular convex strip is embedded in the annular groove, and the base of the annular convex strip is received in the material blocking groove.

3. The filter housing according to claim 2, characterized in that The annular groove is an annular trapezoidal groove, and the annular convex strip is an annular trapezoidal convex strip.

4. The filter housing according to claim 3, characterized in that The width of the material blocking groove is greater than the opening width of the annular groove.

5. The filter housing according to claim 4, characterized in that The width of the material blocking groove is greater than the cross-sectional width of the annular convex strip.

6. The filter housing according to claim 1, characterized in that The first shell and the second shell are welded together by thermal melting.

7. The filter housing according to claim 1, characterized in that The material retaining groove is an annular material retaining groove.

8. The filter housing according to any one of claims 1 to 7, characterized in that The first shell has a first interface, and the first interface is communicated with the inner cavity of the first shell; The second shell has a second interface, and the second interface is communicated with the inner cavity of the second shell.

9. The filter housing according to claim 8, characterized in that At least one of the first shell and the second shell has an exhaust port.

10. A capsule filter, characterized in that: It comprises a filter housing and a filter element arranged in the filter housing; the filter housing is the filter housing according to any one of claims 1 to 9.

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