A sealing cover fixing member for a plastic pressure filter cartridge chamber

Abstract

A kind of sealing cover fixing member for plastic pressure filter cartridge cavity belongs to flange fastening technical field, including the flange piece at the end of filter pipeline, detachable cover is matched on the flange piece, and fastening structure is arranged between the flange piece and cover, and the fastening structure includes the top end portion located on the cover when fixed, the bottom end portion matched with the flange piece or filter pipeline and several fastener units between the top end portion and bottom end portion, wherein the sealing of cover on the flange piece or opening is realized by the sequential adjustment of single or several fastener units. A sealing cover fixing member without setting fixed support lug is provided.

Description

Technical Field

[0001] This application belongs to the field of flange fastening technology, and specifically relates to a sealing cover fastener for a filter element cavity of a plastic pressure filter. Background Technology

[0002] Currently, there are two main types of cartridge filters in production. One type is generally made of stainless steel or carbon steel welded together, or lined with plastic to enhance corrosion resistance. Its structure consists of three main components: the cylinder, the filter bag, and the support feet. This type of structure is welded as a whole, which is relatively expensive. For corrosive media, it is necessary to improve the corrosion resistance of the material. Even with plastic lining, the lining may fall off after a period of use, causing unexpected trouble in production. There are many instances of this phenomenon in actual production sites, and the use of lining further increases the cost.

[0003] Secondly, there are existing plastic filtration equipment. This type of equipment is manufactured by welding plastic sheets and pipes. This structure requires a lot of reinforcement to ensure pressure resistance, resulting in a large amount of manual welding and increased equipment costs. At the same time, after a little longer use, the plastic welds are prone to leakage under the alternating internal and external pressure. This is more likely to occur within six months of the equipment being put into use. Such equipment has a rough appearance and poor aesthetics, and can only be used under very low pressure. This makes such equipment completely hopeless in the future development of filtration equipment.

[0004] In the publication document CN222901060U, a manhole flange for easy cleaning is included, comprising a head flange and a cylindrical flange. The head flange is sealed on top of the cylindrical flange, and the head flange and the cylindrical flange are hinged at one end. The cylindrical flange is welded to the top of the reactor. The upper diameter of the cylindrical flange remains constant, and the diameter gradually increases from the middle to the bottom to form a figure-eight hole. The top of the head flange is sealed by a spherical cap. However, the structure of the fixed lug in the plastic part of this application is relatively weak in structural strength and is prone to breakage during fastening. Moreover, the hole for the fixed lug to hold the fixing pin is also very difficult to open. Utility Model Content

[0005] The purpose of this utility model is to address the existing problems by providing a sealing cover fastener that does not require the installation of a fixed support lug.

[0006] To achieve the above-mentioned technical objectives, the following technical solution is provided: a sealing cover fixing component for a plastic pressure filter element cavity, comprising a flange located at the end of a filter pipe, a detachable cover fitted on the flange, and a fastening structure provided between the flange and the cover. The fastening structure includes a top part located on the cover when fixed, a bottom part that mates with the flange or filter pipe, and a plurality of fastener units located between the top part and the bottom part. The cover can be sealed or opened on the flange by sequentially adjusting one or more fastener units.

[0007] In one feasible embodiment, the fastener unit is a lifting lug bolt, which includes a rod housed within the flange and the cover, and lifting lug nuts and rings located at both ends of the rod, wherein the lifting lug nuts are located within the top end and the rings are located within the bottom end.

[0008] In one feasible embodiment, the bottom end also includes a bottom rod that clamps onto the filter pipe, wherein loops are evenly distributed along the filter pipe and fitted onto the bottom rod.

[0009] In one feasible embodiment, the bottom rod can be divided into several bottom rod segments, each of which mates with a fastener unit, wherein a ring is fitted onto the bottom rod segment, both ends of the bottom rod segment have fixing nuts, and the bottom rod segment is fixed to a flange or filter pipe.

[0010] In an feasible implementation, the fastener unit is rotated along the bottom rod by a ring to engage with or disengage from the flange and cap.

[0011] In one feasible embodiment, the bottom end also includes an auxiliary pad, which is disposed between the flange and the bottom rod, and the bottom rod serves as a pad.

[0012] In one feasible embodiment, the top portion includes several limiting plates that mate with fastener units on the cover and are secured by lug nuts.

[0013] In one feasible method, each limiting piece cooperates with each other to form a fixing ring on the outer edge of the cap, thereby fixing the entire cap in place.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The design eliminates the unstable structure of fixed lugs. Instead, it improves strength during installation by using a single, continuous base rod as a support, or by fixing several sections of the base rod to the filter pipe or flange, thus protecting the flange. The base rod serves as the integral load-bearing support, and the lifting lug bolts achieve a stable connection through the loops between the lugs and the base rod. A modular matching approach is available, supporting both segmented base rods and integral clamp installation methods. The lifting lug bolts can be flexibly adapted to different structures via the loops.

[0016] By using the wedge-shaped fit between the inclined surface of the setter block and the inclined groove of the end cap flange, the rotational force of the lifting eye nut is converted into vertical sealing pressure, which is more reliable than the planar seal of traditional bolt flanges. The rotating design of the ring makes disassembly and assembly more convenient.

[0017] The bottom rod works in conjunction with the auxiliary pad to enhance overall strength and prevent the flange or filter pipe from directly bearing the fastening stress. Attached Figure Description

[0018] 1. Filter pipe; 2. Flange; 3. Cover; 4. Fastening structure; 5. Fastener unit; 42. Top end; 43. Bottom end; 430. Bottom rod; 431. Auxiliary pad; 420. Limiting plate; 51. Rod body; 52. Lifting lug nut; 53. Ring.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a top view of Embodiment 1;

[0022] Figure 4 yes Figure 3 Sectional view at point AA;

[0023] Figure 5 This is a partial structural schematic diagram of Embodiment 3. Detailed Implementation

[0024] Example 1, as Figure 1 and Figure 2 The illustration shows a sealing cap fastener for a plastic pressure filter cartridge cavity, comprising a flange 2 located at the end of a filter pipe 1, a removable cap 3 fitted on the flange 2, and a fastening structure 4 provided between the flange 2 and the cap 3. The fastening structure 4 includes a top end 42 located on the cap 3 when fixed, a bottom end 43 that cooperates with the flange 2, and a plurality of fastener units 5 located between the top end 42 and the bottom end 43. In this embodiment, the fastener units 5 are preferably eight, wherein the cap 3 is sealed or opened on the flange 2 by sequentially adjusting one or several fastener units 5.

[0025] In this embodiment, as Figure 3 and Figure 4 The fastener unit 5 shown is a lifting lug bolt, which includes a rod 51 housed in the flange 2 and the cover 3, and lifting lug nuts 52 and rings 53 located at both ends of the rod 51, wherein the lifting lug nuts 52 are located in the top end 42 and the rings 53 are located in the bottom end 43.

[0026] In this embodiment, the top portion 42 includes several limiting pieces 420, and eight limiting pieces 420 also cooperate with the fastener unit 5. The limiting pieces 420 and the fastener unit 5 are located on the cover 3 and are fixed by the lifting lug nuts 52. After each limiting piece 420 cooperates with each other, it forms a fixing ring on the outer edge of the cover 3, fixing the cover 3 to the entire surface. The eight lifting lug bolts are evenly distributed and form a ring fixing structure through the limiting pieces 420, which evenly transmits the fastening force to the entire outer edge of the cover and avoids local stress concentration.

[0027] In this embodiment, the bottom end portion 43 further includes a bottom rod 430, which can be further divided into several bottom rod segments. The bottom rod 430 that cooperates with the fastener unit 5 is also divided into eight segments, with each bottom rod segment cooperating with the fastener unit 5. A ring 53 is fitted onto the bottom rod segment, and both ends of the bottom rod segment have fixing nuts. The bottom rod segment is fixed to the flange 2. The bottom end portion 43 also includes an auxiliary pad 431, which is disposed between the flange 2 and the bottom rod 430, serving as a padding element. The two ends of the bottom rod segment are bent into a "U" shape or a rectangular shape with an opening. The ring 53, which serves as the lifting lug bolt of the fastening unit 5, is fitted inside the bottom rod segment, positioning it as close to the center of the bottom rod segment as possible. Then, both ends of the bottom rod segment pass through the auxiliary pad 431 and the flange 2, protruding into a pre-formed groove in the flange 2. The bottom rod segment is then fastened to the flange 2 by fixing nuts. The rod 51 of the lifting lug bolt, which serves as the fastening unit 5, rotates along the bottom rod section via the ring 53 to either insert into or separate from the flange 2 and the cover 3. When inserted, it seals the cover 3; when separated, it can be opened.

[0028] Example 2: A sealing cover fixing component for the filter element cavity of a plastic pressure filter includes a flange 2 located at the end of the filter pipe 1, a detachable cover 3 fitted on the flange 2, and a fastening structure 4 provided between the flange 2 and the cover 3; In this example 2, the flange 2 and the filter pipe 1 are not integrally formed, the flange 2 is sleeved on the filter pipe 1, and the position of the flange 2 is restricted by the baffle on the filter pipe 1.

[0029] The fastening structure 4 includes a top part 42 located on the cover 3 when fixed, a bottom part 43 that cooperates with the filter pipe 1, and a number of fastener units 5 located between the top part 42 and the bottom part 43. In this second embodiment, the number of fastener units 5 is preferably eight. The cover 3 can be sealed or opened on the flange 2 by adjusting one or several fastener units 5 in sequence.

[0030] In this embodiment, the bottom end portion 43 further includes a bottom rod 430, which can be further divided into several bottom rod segments. The bottom rod 430 that cooperates with the fastener unit 5 is also divided into eight segments, with each bottom rod segment cooperating with the fastener unit 5. A ring 53 is fitted onto the bottom rod segment, and both ends of the bottom rod segment have fixing nuts. The bottom rod segment is fixed to the flange 2. The bottom end portion 43 also includes an auxiliary pad 431, which is disposed between the flange 2 and the bottom rod 430, serving as a padding element. Both ends of the bottom rod segment are bent into a "U" shape or a rectangular shape with an opening. The ring 53, which serves as the lifting lug bolt of the fastening unit 5, is fitted inside the bottom rod segment, ensuring it is positioned as close to the center of the bottom rod segment as possible. Then, both ends of the bottom rod segment pass through the auxiliary pad 431, the flange 2, and the flange of the filter pipe 1, protruding into a pre-formed groove in the flange of the filter pipe 1. The bottom rod segment is then fastened to the flange of the filter pipe 1 using fixing nuts. The rod 51 of the lifting lug bolt, which serves as the fastening unit 5, rotates along the bottom rod segment via the ring 53, allowing it to either engage with or disengage from the flange 2 and the cover 3. When engaged, it seals the cover 3; when disengaged, it allows the cover 3 to be opened. The remaining structure is the same as in Embodiment 1.

[0031] Example 3, as Figure 5 The illustration shows a sealing cap fastener for a plastic pressure filter cartridge cavity, comprising a flange 2 located at the end of a filter pipe 1, a removable cover 3 fitted on the flange 2, and a fastening structure 4 provided between the flange 2 and the cover 3. The fastening structure 4 includes a top end 42 located on the cover 3 when fixed, a bottom end 43 that fits with the filter pipe 1, and a plurality of fastener units 5 located between the top end 42 and the bottom end 43. In this embodiment, the fastener units 5 are preferably eight, wherein the cover 3 is sealed or opened on the flange 2 by sequentially adjusting one or more fastener units 5.

[0032] In this embodiment, the bottom end portion 43 further includes a bottom rod 430, which is clamped onto the filter pipe 1. Rings 53 are evenly distributed along the filter pipe 1 and fitted onto the bottom rod 430. The bottom end portion 43 also includes an auxiliary pad 431, which is positioned between the flange 2 and the bottom rod 430, serving as a padding element. The rings 53 of eight lifting bolts (serving as fastening units 5) are fitted onto the bottom rod section, ensuring they are evenly distributed along the bottom rod 430. The bottom rod 430 is then clamped onto the outside of the filter pipe 1 and secured within the auxiliary pad 431. The two ends of the bottom rod 430 are tightened using fixing nuts. The rod body 51 of the lifting bolts (serving as fastening units 5) rotates along the bottom rod 430 via the rings 53, allowing it to either engage with or disengage from the flange 2 and the cover 3. When engaged, it seals the cover 3; when disengaged, it allows the cover 3 to be opened. The remaining structure is the same as in Embodiment 1.

[0033] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0036] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sealing cap fastener for a filter element cavity of a plastic pressure filter, comprising a flange (2) located at the end of a filter pipe (1), wherein a removable cap (3) is fitted onto the flange (2), characterized in that, A fastening structure (4) is provided between the flange (2) and the cover (3). The fastening structure (4) includes a top part (42) located on the cover (3) when fixed, a bottom part (43) that cooperates with the flange (2) or the filter pipe (1), and a plurality of fastener units (5) located between the top part (42) and the bottom part (43). The cover (3) is sealed or opened on the flange (2) by adjusting one or more of the fastener units (5) in sequence.

2. The sealing cover fixing member for the filter element cavity of a plastic pressure filter according to claim 1, characterized in that, The fastener unit (5) is a lifting lug bolt, which includes a rod (51) housed in the flange (2) and the cover (3), and lifting lug nuts (52) and rings (53) located at both ends of the rod (51), wherein the lifting lug nuts (52) are located in the top end (42) and the rings (53) are located in the bottom end (43).

3. The sealing cap fixing member for the filter element cavity of a plastic pressure filter according to claim 2, characterized in that, The bottom end (43) also includes a bottom rod (430), which is clamped on the filter pipe (1), wherein the rings (53) are sleeved on the bottom rod (430) and evenly distributed along the filter pipe (1).

4. The sealing cover fixing member for the filter element cavity of a plastic pressure filter according to claim 3, characterized in that, The bottom rod (430) can also be divided into several bottom rod segments, each of which cooperates with the fastener unit (5), wherein the ring (53) is sleeved on the bottom rod segment, both ends of the bottom rod segment have fixing nuts, and the bottom rod segment is fixed on the flange (2) or the filter pipe (1).

5. The sealing cap fixing member for the filter element cavity of a plastic pressure filter according to claim 3 or 4, characterized in that, The fastener unit (5) rotates along the bottom rod (430) via the ring (53) to engage with or disengage from the flange (2) and the cover (3).

6. The sealing cover fixing member for the filter element cavity of a plastic pressure filter according to claim 3, characterized in that, The bottom end (43) also includes an auxiliary pad (431), which is disposed between the flange (2) and the bottom rod (430), and the bottom rod (430) has a padding function.

7. The sealing cover fixing member for the filter element cavity of a plastic pressure filter according to claim 2, characterized in that, The top part (42) includes a plurality of limiting pieces (420), which cooperate with the fastener unit (5) and are located on the cover (3) and are fixed by the lug nut (52).

8. The sealing cap fixing member for the filter element cavity of a plastic pressure filter according to claim 7, characterized in that, Each of the limiting pieces (420) cooperates with each other to form a fixing ring on the outer edge of the cover (3), thereby fixing the cover (3) on the whole surface.

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