Detachable multi-stage framework filter bag of bag type dust collector

Abstract

The utility model relates to a detachable multi-stage framework filter bag of a bag type dust collector. The detachable multi-stage framework filter bag comprises a front section part, a middle connecting part and a tail section part, the middle connecting part is arranged between the front section part and the tail section part; the front section part comprises a front section framework and a front section filter bag part surrounding the front section framework; the two opposite ends of the front-section filter bag part are respectively provided with an opening; the middle connecting part comprises a middle-section framework and a middle-section filter bag part surrounding the middle-section framework; the two opposite ends of the middle section filter bag part are respectively provided with an opening; the tail section part comprises a tail section framework and a tail section filter bag part surrounding the tail section framework (131); wherein one end of the tail-section filter bag part is provided with an opening, and the other end of the tail-section filter bag part is closed; the front-section framework, the middle-section framework and the tail-section framework are coaxially and detachably connected with one another.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection, in particular to a detachable multi-stage skeleton filter bag of a bag-type dust collector. Background Art

[0002] With the development of industry, human production activities have an increasingly greater impact on the environment. PM2.5 in the air not only seriously damages the environment, but also affects people's health. The country pays more and more attention to relevant environmental protection and has formulated a series of relevant policy documents, which are not only aimed at protecting the environment, but also effectively protecting the health of production personnel. Safe and green production requires dust control from the source.

[0003] Bag dust collector is a dry dust collector that can be used to capture fine, dry, non-fibrous dust. It is often used in various industrial fields such as mining, metallurgy, chemical industry, electricity, building materials, etc. When bag dust collectors are used in these scenarios, a large air volume is often required to meet the dust removal needs of the factory area. The corresponding bag dust collector also requires a large filtration area, so the diameter and length of the filter bag are also correspondingly larger.

[0004] Although the increased size of the filter bag can meet the needs of dust removal and filtration area, it also brings some related problems. As the length of the filter bag increases, the difficulty of installation also increases accordingly, and the subsequent inspection and maintenance also becomes more inconvenient. The filter bags currently used in bag dust collectors have an integrated frame. When used in large scenes, the diameter and length of the filter bag will be too large, which is not convenient for installation and maintenance, increasing the installation and maintenance costs; when the filter bag is damaged, the entire filter bag needs to be replaced. The cost of large filter bags is relatively high, so the subsequent maintenance costs are relatively high; when producing large-sized filter bags, welding the frame and installing the filter material are relatively complicated, and the production difficulty is relatively increased. In addition, in the current filter bag structure, once the frame is formed, its size and the size of the filter bag cannot be changed, resulting in its lack of universality and easy waste of resources. Utility Model Content

[0005] The utility model aims to provide a detachable multi-stage skeleton filter bag of a bag type dust collector.

[0006] In order to achieve the above-mentioned utility model object, the utility model provides a detachable multi-stage skeleton filter bag of a bag dust collector, comprising: a front section, a middle connecting section and a tail section;

[0007] The middle connecting part is arranged between the front section and the rear section;

[0008] The front section part comprises: a front section frame and a front section filter bag part surrounded by the front section frame; wherein the front section filter bag part has openings at two opposite ends respectively;

[0009] The intermediate connection part comprises: an intermediate section frame and an intermediate section filter bag part surrounded by the intermediate section frame; wherein the intermediate section filter bag part has openings at opposite ends thereof;

[0010] The tail section part comprises: a tail section frame and a tail section filter bag part surrounded by the tail section frame; wherein one end of the tail section filter bag part has an opening and the other end has a closed setting;

[0011] The front section frame, the middle section frame and the tail section frame are coaxially detachably connected to each other.

[0012] According to one aspect of the utility model, annular seals are respectively provided between the positions where the front section frame, the middle section frame and the tail section frame are connected to each other.

[0013] According to one aspect of the utility model, the front section frame comprises: a first front section flange, a front section frame structure and a second front section flange;

[0014] The first front flange and the second front flange are coaxially arranged with each other and spaced apart;

[0015] The front section skeleton structure is arranged between the first front section flange and the second front section flange, and opposite ends of the front section skeleton structure are detachably connected to the first front section flange and the second front section flange respectively;

[0016] A venturi tube is provided on one side of the first front section flange adjacent to the front section skeleton structure;

[0017] The middle section skeleton comprises: a first middle section flange, a middle section skeleton structure and a second middle section flange;

[0018] The first middle section flange and the second middle section flange are coaxially arranged with each other and spaced apart;

[0019] The middle section skeleton structure is disposed between the first middle section flange and the second middle section flange, and opposite ends of the middle section skeleton structure are detachably connected to the first middle section flange and the second middle section flange respectively;

[0020] The tail section skeleton comprises: a tail section flange and a tail section skeleton structure;

[0021] One end of the tail section skeleton structure is detachably connected to the tail section flange;

[0022] The second front flange is detachably connected to the first middle flange;

[0023] The second middle section flange is detachably connected to the tail section flange.

[0024] According to one aspect of the utility model, a first connection structure is respectively provided on a side of the first front section flange adjacent to the front section skeleton structure, a side of the first middle section flange adjacent to the middle section skeleton structure, and a side of the tail section flange adjacent to the tail section skeleton structure;

[0025] A second connection structure is provided on a side of the second front section flange adjacent to the front section skeleton structure and a side of the second middle section flange adjacent to the middle section skeleton structure;

[0026] The first front flange is fixedly connected to one end of the front filter bag part based on the first connection structure, and the second front flange is fixedly connected to the other end of the front filter bag part based on the second connection structure;

[0027] The first middle section flange is fixedly connected to one end of the middle section filter bag part based on the first connection structure, and the second middle section flange is fixedly connected to the other end of the middle section filter bag part based on the second connection structure;

[0028] The tail section flange is fixedly connected to one end of the tail section filter bag part based on the first connection structure.

[0029] According to one aspect of the utility model, the first connection structure includes: a first circular ring and a first clamp coaxial with the first circular ring and detachably connected;

[0030] The outer side surface of the first circular ring is provided with a first annular protrusion;

[0031] The inner side surface of the first clamp is provided with a first annular groove for matching with the first annular protrusion (1511);

[0032] The second connection structure comprises: a second circular ring and a second clamp coaxial with the second circular ring and detachably connected thereto;

[0033] The outer side surface of the second circular ring is provided with a second annular protrusion;

[0034] The inner side surface of the second clamp is provided with a second annular groove for matching with the second annular protrusion.

[0035] According to one aspect of the utility model, the opening ends of the front filter bag portion, the middle filter bag portion and the rear filter bag portion are respectively provided with elastic cinch bands.

[0036] According to one aspect of the utility model, the outer side surface of the first circular ring is further provided with a first positioning groove for limiting the elastic cuff band;

[0037] The first positioning groove and the first annular protrusion are spaced apart from each other;

[0038] The outer side surface of the second ring is also provided with a second positioning groove for limiting the elastic cuff band;

[0039] The second positioning groove and the second annular protrusion are spaced apart.

[0040] According to one aspect of the utility model, the radial dimension of the first circular ring is greater than or equal to the radial dimension of the second circular ring.

[0041] According to one aspect of the utility model, the first front flange, the first middle flange and the tail flange are respectively provided with a clamping hole penetrating through the body thereof;

[0042] The second front flange and the second middle flange are respectively provided with buckles for connecting with the clamping holes;

[0043] The clamping hole comprises: a first clamping hole part and a second clamping hole part which are interconnected;

[0044] The second clamping hole portion is arranged obliquely relative to the first clamping hole portion, wherein the width of the first clamping hole portion is constant along a direction approaching the second clamping hole portion, and the width of the second clamping hole portion is gradually reduced along a direction away from the first clamping hole portion;

[0045] The buckle comprises: a buckle column and a buckle limiting portion;

[0046] The buckle cylinder is a cylindrical structure, and its radial dimension is matched with the width of the end of the second clamping hole portion away from the first clamping hole portion;

[0047] The buckle limiting portion is a regular plate-shaped body, and its area is smaller than the opening size of the first clamping hole portion and larger than the opening size of the end of the second clamping hole portion away from the first clamping hole portion.

[0048] According to one aspect of the utility model, a circular hole structure is provided at one end of the second clamping hole portion away from the first clamping hole portion, and the radial dimension of the circular hole structure is greater than the end width of the second clamping hole portion;

[0049] A flexible sleeve is nested outside the buckle cylinder, and the radial dimension of the flexible sleeve is matched with the radial dimension of the circular hole structure.

[0050] According to a solution of the utility model, this solution adopts a detachable multi-stage modular design, which can be spliced ​​into different lengths according to different application scenarios and the requirements of the filtration area, has a wide range of applications, is convenient for installation and maintenance, and greatly reduces the cost of installation and maintenance. Moreover, compared with traditional large-size filter bags, the production difficulty is greatly reduced.

[0051] According to a solution of the utility model, the solution can adopt a chuck clamp type installation method, each module bracket can be quickly disassembled and assembled, the installation is quick and convenient, and the labor cost of installation and maintenance is greatly reduced;

[0052] According to a solution of the utility model, if a part of the filter bag is damaged during operation, only the filter bag part of the corresponding module needs to be replaced, and there is no need to replace the entire filter bag like a traditional filter bag, thereby reducing the cost of filter material loss.

[0053] According to a solution of the utility model, the structure in which the modules are connected to each other is a universal structure, and the length dimensions of the modules can be set to be consistent or different, which is more convenient for production and processing and suitable for large-scale production.

[0054] According to a solution of the utility model, the filter bag of the utility model can be easily assembled and disassembled by detaching the various parts from each other. In particular, when the length of the entire filter bag needs to be changed, the flexibility of adjusting the entire filter bag can be improved by increasing or decreasing the number of connected intermediate connecting parts 12.

[0055] According to a scheme of the utility model, the filter bag part used for filtering is directly installed on the skeleton in advance, so that the filter bag part can be assembled together when each skeleton is connected, avoiding the step-by-step installation of the skeleton and the filter bag part during the installation of the overall filter bag, which greatly improves the installation flexibility and high efficiency of the filter bag of the utility model when used in the filtering equipment.

[0056] According to a scheme of the utility model, the filter bag of the utility model is arranged in a manner of multiple components, so that when cleaning, each component can be directly removed from the filter device, and the removed components can be moved together to the cleaning area for further removal and cleaning of the filter bag part, thereby avoiding the disadvantages of traditional operations in which the skeleton must be separated from the filter bag before the filter bag can be removed from the filter device and the filter bag has no skeleton support, causing dust to fall easily, thereby effectively reducing the amount of dust falling in the filter device when the filter bag is removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 Schematically shows the structure of a detachable multi-stage skeleton filter bag according to an embodiment of the utility model;

[0058] Figure 2 is a structural diagram schematically showing a front section skeleton according to an embodiment of the utility model;

[0059] Figure 3 is a structural diagram schematically showing a middle section skeleton according to an embodiment of the utility model;

[0060] Figure 4 is a structural diagram schematically showing a tail section skeleton according to an embodiment of the utility model;

[0061] Figure 5 is a structural diagram schematically showing an installation position diagram of an annular seal according to an embodiment of the utility model;

[0062] Figure 6 is a structural diagram schematically showing a first ring according to an embodiment of the present utility model;

[0063] Figure 7 is a structural diagram schematically showing a second ring according to an embodiment of the present utility model;

[0064] Figure 8 is a cross-sectional view schematically showing a first clamp according to an embodiment of the utility model;

[0065] Fig. 9 is a cross-sectional view schematically showing a second clamp according to an embodiment of the utility model;

[0066] Fig.10 is a structural diagram schematically showing a clamping hole according to an embodiment of the utility model;

[0067] Fig.11 Schematically shows the structure of a buckle according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0068] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0069] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0070] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0071] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, a detachable multi-stage skeleton filter bag of a bag-type dust collector of the present invention comprises: a front section 11, an intermediate connecting section 12 and a rear section 13; in this embodiment, the front section 11, the intermediate connecting section 12 and the rear section 13 are coaxially arranged with each other, and the intermediate connecting section 12 is arranged between the front section 11 and the rear section 13. In this embodiment, the intermediate connecting section 12 can be set to one or more, and the number of the intermediate connecting sections 12 can be flexibly adjusted according to the needs of the actual application. In this embodiment, when the intermediate connecting section 12 is set to multiple, the length dimensions of each intermediate connecting section 12 can be consistent or different, so as to realize the flexible change of the overall size of the filter bag.

[0072] In this embodiment, the front section 11 includes: a front section skeleton 111 and a front section filter bag section 112 surrounded by the front section skeleton 111; wherein, the two opposite ends of the front section filter bag section 112 are respectively provided with openings; in this embodiment, the front section filter bag section 112 can be made of existing mature filter materials, and its overall structure is a cylindrical structure to achieve the installation with the front section skeleton 111.

[0073] In this embodiment, the middle connecting part 12 includes: a middle section skeleton 121 and a middle section filter bag part 122 surrounded by the middle section skeleton 121; wherein, the two opposite ends of the middle section filter bag part 122 are respectively provided with openings; in this embodiment, the middle section filter bag part 122 can be made of existing mature filter materials, and its overall structure is a cylindrical structure so as to be mounted with the middle section skeleton 121.

[0074] In this embodiment, the tail section 13 includes: a tail section frame 131 and a tail section filter bag portion 132 surrounded by the tail section frame 131; wherein one end of the tail section filter bag portion 132 has an opening and the other end is closed; in this embodiment, the tail section filter bag portion 132 can be made of existing mature filter materials, and the whole is a cylindrical structure with one end closed, so as to be set with the tail section frame 131. The tail section filter bag portion 132 is configured as above, so that the filter bag can only have an opening in the front section 11, so that the smoke with dust can pass through each filter bag portion (i.e., the front section filter bag portion 112, the middle section filter bag portion 122, and the tail section filter bag portion 132), and flow out through the opening of the front section 11.

[0075] In this embodiment, the front section skeleton 111, the middle section skeleton 121 and the tail section skeleton 131 are coaxially detachably connected to each other, wherein the front section 11, the middle connecting part 12 and the tail section 13 are connected to each other based on the set skeleton to achieve mutual connection of each part.

[0076] Through the above-mentioned arrangement, the filter bag of the utility model can be conveniently assembled and disassembled by making the various parts mutually detachable. In particular, when the length of the entire filter bag needs to be changed, the flexibility of adjusting the entire filter bag can be improved by increasing or decreasing the number of the connected intermediate connecting parts 12.

[0077] Through the above-mentioned arrangement, the utility model can realize the assembly of the filter bag parts together while connecting the various frames by directly installing the filter bag parts used for filtration on the frame in advance, thus avoiding the step-by-step installation of the frame and the filter bag parts during the installation of the overall filter bag, thereby greatly improving the installation flexibility and high efficiency of the filter bag of the utility model when used in the filtering equipment.

[0078] Through the above-mentioned arrangement, the filter bag of the utility model is arranged in a manner of multiple components, so that when cleaning, each component can be directly removed from the filter device, and the removed components can be moved together to the cleaning area for further removal and cleaning of the filter bag part. This avoids the disadvantages of traditional operations that the frame must be separated from the filter bag before the filter bag can be removed from the filter device, and the filter bag has no frame support, which makes it easy for dust to fall. This effectively reduces the amount of dust falling in the filter device when the filter bag is removed.

[0079] Combination Figure 1 and Figure 5As shown, according to an embodiment of the present invention, an annular seal 14 is respectively provided between the positions where the front section skeleton 111, the middle section skeleton 121 and the tail section skeleton 131 are connected to each other. In this embodiment, the annular seal 14 is made of elastic material, for example, rubber material, and is provided between the connection positions of adjacent skeletons, so that the adjacent skeletons press against the annular seal 14 to ensure the sealing of the connection position, avoid air leakage at the connection position, and effectively ensure the filtering effect of the present invention.

[0080] like Figure 2 As shown, according to an embodiment of the utility model, the front section skeleton 111 includes: a first front section flange 1111, a front section skeleton structure 1112 and a second front section flange 1113; in this embodiment, the first front section flange 1111 and the second front section flange 1113 are coaxial and spaced from each other; wherein, the outer dimensions of the first front section flange 1111 and the second front section flange 1113 are consistent, so as to facilitate the convenient processing of the structure in the front section skeleton 111, and reduce the processing cost of the front section skeleton 111. In this embodiment, the front section skeleton structure 1112 is arranged between the first front section flange 1111 and the second front section flange 1113, and the opposite ends of the front section skeleton structure 1112 are detachably connected to the first front section flange 1111 and the second front section flange 1113 respectively; wherein, the front section skeleton structure 1112 can be detachably connected to the first front section flange 1111 and the second front section flange 1113 by means of threaded connection, clamping, threaded locking member locking connection, etc. In this embodiment, a venturi tube 1111a is disposed on one side of the first front flange 1111 adjacent to the front skeleton structure 1112, and the venturi tube 1111a is used to promote the flow of air.

[0081] like Figure 3 As shown, in this embodiment, the middle section skeleton 121 includes: a first middle section flange 1211, a middle section skeleton structure 1212 and a second middle section flange 1213; in this embodiment, the first middle section flange 1211 and the second middle section flange 1213 are coaxial and spaced from each other; wherein, the outer dimensions of the first middle section flange 1211 and the second middle section flange 1213 are consistent, so as to facilitate the convenient processing of the structure in the middle section skeleton 121 and reduce the processing cost of the middle section skeleton 121. In this embodiment, the middle section skeleton structure 1212 is arranged between the first middle section flange 1211 and the second middle section flange 1213, and the opposite ends of the middle section skeleton structure 1212 are detachably connected to the first middle section flange 1211 and the second middle section flange 1213 respectively; wherein, the middle section skeleton structure 1212 can be detachably connected to the first middle section flange 1211 and the second middle section flange 1213 by means of threaded connection, clamping, threaded locking member locking connection, etc.

[0082] like Figure 4 As shown, in the present embodiment, the tail section skeleton 131 includes: a tail section flange 1311 and a tail section skeleton structure 1312; in the present embodiment, one end of the tail section skeleton structure 1312 is detachably connected to the tail section flange 1311; wherein, the tail section skeleton structure 1312 can be detachably connected to the tail section flange 1311 by means of threaded connection, clamping, threaded locking member locking connection, etc.

[0083] In this embodiment, the second front flange 1113 is detachably connected to the first middle flange 1211; the second middle flange 1213 is detachably connected to the tail flange 1311. In addition, when there are multiple middle connecting parts 12, the first middle flange 1211 and the second middle flange 1213 of two adjacent middle connecting parts 12 are detachably connected to each other to facilitate the connection.

[0084] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, according to an embodiment of the utility model, the first front flange 1111 is provided with a first connection structure 15 on one side adjacent to the front frame structure 1112, the first middle flange 1211 is provided with a first connection structure 15 on one side adjacent to the middle frame structure 1212, and the tail flange 1311 is provided with a first connection structure 15 on one side adjacent to the tail frame structure 1312; the first connection structure 15 is provided on the first front flange 1111, the first middle flange 1211, and the tail flange 1311, respectively, so that it is easier to connect with each filter bag part. In this embodiment, the second front flange 1113 is provided with a second connection structure 16 on one side adjacent to the front frame structure 1112, and the second middle flange 1213 is provided with a second connection structure 16 on one side adjacent to the middle frame structure 1212; the second front flange 1113 and the second middle flange 1213 are provided with a second connection structure 16 on one side adjacent to the filter bag part. Specifically, the first front section flange 1111 is fixedly connected to one end of the front section filter bag part 112 based on the first connecting structure 15, and the second front section flange 1113 is fixedly connected to the other end of the front section filter bag part 112 based on the second connecting structure 16; the first middle section flange 1211 is fixedly connected to one end of the middle section filter bag part 122 based on the first connecting structure 15, and the second middle section flange 1213 is fixedly connected to the other end of the middle section filter bag part 122 based on the second connecting structure 16; the tail section flange 1311 is fixedly connected to one end of the tail section filter bag part 132 based on the first connecting structure 15.

[0085] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, according to an embodiment of the utility model, the first connection structure 15 includes: a first circular ring 151 and a first clamp 152 which is coaxial with the first circular ring 151 and detachably connected; wherein, the outer side surface of the first circular ring 151 is provided with a first annular protrusion 1511; and the inner side surface of the first clamp 152 is provided with a first annular groove 1521 for matching with the first annular protrusion 1511. In this embodiment, the first annular protrusion 1511 can be set as an annular protrusion structure with a cross-section in a rectangular, circular, triangular, trapezoidal or other shapes, and accordingly, the cross-sectional shape of the first annular groove 1521 is matched with the cross-sectional shape of the first annular protrusion 1511. Through the mutual cooperation of the first annular groove 1521 and the first annular protrusion 1511, the first clamp 152 and the first circular ring 151 can fix and seal the filter bag part, effectively ensuring the sealing of the connection position between the filter bag and the skeleton.

[0086] In this embodiment, the second connection structure 16 includes: a second circular ring 161 and a second clamp 162 which is coaxial with the second circular ring 161 and detachably connected; wherein, the outer side surface of the second circular ring 161 is provided with a second annular protrusion 1611; and the inner side surface of the second clamp 162 is provided with a second annular groove 1621 for matching with the second annular protrusion 1611. In this embodiment, the second annular protrusion 1611 can be set as an annular protrusion structure with a cross-section in a rectangular, circular, triangular, trapezoidal or other shapes, and accordingly, the cross-sectional shape of the second annular groove 1621 is matched with the cross-sectional shape of the second annular protrusion 1611. Through the mutual cooperation of the second annular groove 1621 and the second annular protrusion 1611, the second clamp 162 and the second circular ring 161 can fix and seal the filter bag part, effectively ensuring the sealing of the connection position between the filter bag and the frame.

[0087] Combination Figure 3 and Figure 5As shown, according to an embodiment of the utility model, a sealing member limiting groove a is provided on the side of the first front section flange 1111 away from the front section skeleton structure 1112, the side of the first middle section flange 1211 away from the middle section skeleton structure 1212, and the side of the tail section flange 1311 away from the tail section skeleton structure 1312; wherein the cross-sectional shape of the sealing member limiting groove a is matched with the cross-sectional shape of the annular seal 14 provided to ensure the reliability of the connection position. In this embodiment, on the first front section flange 1111, a plurality of sealing member limiting grooves a can be provided coaxially and at intervals, so that a plurality of annular seals 14 can be provided on the first front section flange 1111 to improve the sealing performance of the connection position. Accordingly, the setting method of the sealing member limiting groove a on the first middle section flange 1211 and the tail section flange 1311 is consistent with the above method to ensure the connection sealing performance of each position.

[0088] According to an embodiment of the utility model, the opening ends of the front filter bag portion 112, the middle filter bag portion 122 and the rear filter bag portion 132 are respectively provided with elastic cinch bands. In this embodiment, the elastic cinch band can be an annular structure, and its radial dimension in a free state is smaller than the opening diameter of the filter bag portion, so that when the filter bag portion is connected to the first circular ring 151 or the second circular ring 161, the elastic cinch band is in a tensioned state, so as to effectively ensure the connection stability between the filter bag portion and the corresponding structure, and provide preliminary sealing for the connection position, which is beneficial to further ensure the sealing of the connection position.

[0089] In addition, when the filter bag needs to be disassembled for cleaning, the dust can be further prevented from falling by wrapping the corresponding filter bag parts with a dust-proof film while removing the various parts of the filter bag. By respectively providing elastic cinch bands at the open ends of the front filter bag part 112, the middle filter bag part 122 and the rear filter bag part 132, the ends of the dust-proof film wrapping the filter bag parts can be tightened by flipping the ends of the filter bag parts. On the one hand, the dust-proof film can be effectively fixed, and on the other hand, dust can be effectively prevented from leaking from the end positions of the dust-proof film.

[0090] Combination Figure 6 and Figure 7 As shown, according to one embodiment of the utility model, the outer side surface of the first circular ring 151 is also provided with a first positioning groove 1512 for limiting the elastic cuff band; the first positioning groove 1512 and the first annular protrusion 1511 are spaced apart; in the present embodiment, the first positioning groove 1512 is adjacent to the fixed end of the first circular ring 151 (i.e., the end of the first circular ring 151 connected to the first front flange 1111, the first middle flange 1211 or the tail flange 1311).

[0091] In this embodiment, the outer side surface of the second circular ring 161 is further provided with a second positioning groove 1612 for limiting the elastic cuff; the second positioning groove 1612 is spaced apart from the second annular protrusion 1611. In this embodiment, the second positioning groove 1612 is disposed adjacent to the fixed end of the second circular ring 161 (i.e., the end of the second circular ring 161 connected to the second front flange 1113 or the second middle flange 1213).

[0092] Through the above-mentioned arrangement, the elastic cuff band of the filter bag part can be conveniently embedded into the first positioning groove 1512 and the second positioning groove 1612 through the arranged first positioning groove 1512 and the second positioning groove 1612, so as to realize stable limiting and preliminary sealing of the end of the filter bag part, and further facilitate the relative ends of the filter bag part to be tensioned, so as to further facilitate the first clamp 152 and the second clamp 162 to clamp and fix the filter bag part to fully seal it.

[0093] According to an embodiment of the utility model, the radial dimension of the first circular ring 151 is greater than or equal to the radial dimension of the second circular ring 161. When the radial dimension of the first circular ring 151 is greater than the radial dimension of the second circular ring 161, the connected filter bag part can be in a conical cylindrical shape with a larger top and a smaller bottom, and the filter bag part can be installed on the frame through the larger opening of the filter bag part and peeled off from the frame from the position of the large opening, thereby improving the convenience of disassembly and assembly of the filter bag part.

[0094] Combination Figure 2 , Figure 3 , Figure 4 , Fig.10 and Fig.11As shown, according to an embodiment of the utility model, the first front flange 1111, the first middle flange 1211 and the tail flange 1311 are respectively provided with a clamping hole 17 penetrating the body thereof, and the second front flange 1113 and the second middle flange 1213 are respectively provided with a clamping buckle 18 for connecting with the clamping hole 17; in this embodiment, the clamping hole 17 comprises: a first clamping hole portion 171 and a second clamping hole portion 172 which are connected to each other; the second clamping hole portion 172 is arranged obliquely relative to the first clamping hole portion 171, wherein the width of the first clamping hole portion 171 is constant along the direction approaching the second clamping hole portion 172, and the width of the second clamping hole portion 172 is gradually reduced along the direction away from the first clamping hole portion 171. In this embodiment, the clamping buckle 18 comprises: a clamping buckle column 181 and a clamping buckle limiting portion 182; wherein the clamping buckle column 181 is a cylindrical structure, and its radial dimension is arranged to match the width of the end of the second clamping hole portion 172 away from the first clamping hole portion 171. In this embodiment, the buckle limiting portion 182 is a regular plate-shaped body, whose area is smaller than the opening size of the first clamping hole portion 171 and larger than the opening size of the end of the second clamping hole portion 172 away from the first clamping hole portion 171 .

[0095] Combination Fig.10 and Fig.11 As shown, according to an embodiment of the present invention, a circular hole structure 173 is provided at one end of the second clamping hole portion 172 away from the first clamping hole portion 171, and the radial dimension of the circular hole structure 173 is greater than the end width of the second clamping hole portion 172. In this embodiment, a flexible sleeve 181a is nested outside the buckle cylinder 181, and the radial dimension of the flexible sleeve 181a is matched with the radial dimension of the circular hole structure 173. In this embodiment, the flexible sleeve 181a can be a rubber sleeve. By providing a circular hole structure 173 with a larger size at one end of the second clamping hole portion 172 and providing a flexible sleeve 181a on the buckle cylinder 181, the flexible sleeve 181a can be squeezed and deformed at the end of the second clamping hole portion 172 to facilitate the buckle cylinder 181 to enter the circular hole structure 173 and to position and restrict the buckle 18 after the flexible sleeve 181a returns to the initial state, thereby ensuring stable and reliable positioning. In addition, the provision of the flexible sleeve 181a facilitates the snap-on cylinder 181 to enter and escape from the circular hole structure 173, making the installation and disassembly process more convenient.

[0096] The above contents are merely examples of specific solutions of the present invention. For the equipment and structures not described in detail, it should be understood that they are implemented by adopting the general equipment and general methods available in the art.

[0097] The above is only one solution of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A detachable multi-stage skeleton filter bag for a bag filter, characterized in that: include: A front section (11), a middle connecting section (12) and a rear section (13); The intermediate connecting portion (12) is arranged between the front section (11) and the rear section (13); The front section (11) comprises: a front section frame (111) and a front section filter bag portion (112) surrounded by the front section frame (111); wherein the front section filter bag portion (112) has openings at two opposite ends respectively; The intermediate connection part (12) comprises: an intermediate section frame (121) and an intermediate section filter bag part (122) surrounding the intermediate section frame (121); wherein the intermediate section filter bag part (122) has openings at opposite ends thereof; The tail section (13) comprises: a tail section frame (131) and a tail section filter bag portion (132) surrounded by the tail section frame (131); wherein one end of the tail section filter bag portion (132) is open and the other end is closed; The front section frame (111), the middle section frame (121) and the rear section frame (131) are coaxially detachably connected to each other.

2. The detachable multi-stage skeleton filter bag according to claim 1 is characterized in that: Annular seals (14) are respectively provided between the positions where the front section frame (111), the middle section frame (121) and the rear section frame (131) are connected to each other.

3. The detachable multi-stage skeleton filter bag according to claim 2 is characterized in that: The front section frame (111) comprises: a first front section flange (1111), a front section frame structure (1112) and a second front section flange (1113); The first front flange (1111) and the second front flange (1113) are coaxially arranged with a spacing therebetween; The front section skeleton structure (1112) is arranged between the first front section flange (1111) and the second front section flange (1113), and opposite ends of the front section skeleton structure (1112) are detachably connected to the first front section flange (1111) and the second front section flange (1113) respectively; A venturi tube (1111a) is provided on one side of the first front flange (1111) adjacent to the front skeleton structure (1112); The middle section skeleton (121) comprises: a first middle section flange (1211), a middle section skeleton structure (1212) and a second middle section flange (1213); The first middle section flange (1211) and the second middle section flange (1213) are coaxially arranged with each other and spaced apart; The middle section skeleton structure (1212) is arranged between the first middle section flange (1211) and the second middle section flange (1213), and opposite ends of the middle section skeleton structure (1212) are detachably connected to the first middle section flange (1211) and the second middle section flange (1213) respectively; The tail section skeleton (131) comprises: a tail section flange (1311) and a tail section skeleton structure (1312); One end of the tail section skeleton structure (1312) is detachably connected to the tail section flange (1311); The second front flange (1113) is detachably connected to the first middle flange (1211); The second middle section flange (1213) is detachably connected to the tail section flange (1311).

4. The detachable multi-stage skeleton filter bag according to claim 3 is characterized in that: A first connection structure (15) is respectively provided on a side of the first front section flange (1111) adjacent to the front section skeleton structure (1112), a side of the first middle section flange (1211) adjacent to the middle section skeleton structure (1212), and a side of the tail section flange (1311) adjacent to the tail section skeleton structure (1312); A second connection structure (16) is respectively provided on a side of the second front section flange (1113) adjacent to the front section skeleton structure (1112) and a side of the second middle section flange (1213) adjacent to the middle section skeleton structure (1212); The first front flange (1111) is fixedly connected to one end of the front filter bag portion (112) based on the first connection structure (15), and the second front flange (1113) is fixedly connected to the other end of the front filter bag portion (112) based on the second connection structure (16); The first middle section flange (1211) is fixedly connected to one end of the middle section filter bag part (122) based on the first connection structure (15), and the second middle section flange (1213) is fixedly connected to the other end of the middle section filter bag part (122) based on the second connection structure (16); The tail section flange (1311) is fixedly connected to one end of the tail section filter bag part (132) based on the first connection structure (15).

5. The detachable multi-stage skeleton filter bag according to claim 4 is characterized in that: The first connection structure (15) comprises: a first circular ring (151) and a first clamp (152) coaxial with the first circular ring (151) and detachably connected; The outer side surface of the first circular ring (151) is provided with a first annular protrusion (1511); The inner side surface of the first clamp (152) is provided with a first annular groove (1521) for matching with the first annular protrusion (1511); The second connection structure (16) comprises: a second circular ring (161) and a second clamp (162) coaxial with the second circular ring (161) and detachably connected; The outer side surface of the second circular ring (161) is provided with a second annular protrusion (1611); The inner side surface of the second clamp (162) is provided with a second annular groove (1621) for matching with the second annular protrusion (1611).

6. The detachable multi-stage skeleton filter bag according to claim 5, characterized in that: The opening ends of the front filter bag portion (112), the middle filter bag portion (122) and the rear filter bag portion (132) are respectively provided with elastic cinch bands.

7. The detachable multi-stage skeleton filter bag according to claim 6, characterized in that: The outer side surface of the first circular ring (151) is also provided with a first positioning groove (1512) for limiting the position of the elastic crotch band; The first positioning groove (1512) and the first annular protrusion (1511) are arranged with a spacing; The outer side surface of the second circular ring (161) is also provided with a second positioning groove (1612) for limiting the position of the elastic cuff band; The second positioning groove (1612) and the second annular protrusion (1611) are arranged with a spacing.

8. The detachable multi-stage skeleton filter bag according to claim 7, characterized in that: The radial dimension of the first circular ring (151) is greater than or equal to the radial dimension of the second circular ring (161).

9. The detachable multi-stage skeleton filter bag according to claim 8, characterized in that: The first front flange (1111), the first middle flange (1211) and the tail flange (1311) are respectively provided with a clamping hole (17) penetrating through the body thereof; The second front flange (1113) and the second middle flange (1213) are respectively provided with buckles (18) for connecting with the clamping holes (17); The clamping hole (17) comprises: a first clamping hole portion (171) and a second clamping hole portion (172) which are communicated with each other; The second clamping hole portion (172) is arranged to be inclined relative to the first clamping hole portion (171), wherein the width of the first clamping hole portion (171) is constant along a direction approaching the second clamping hole portion (172), and the width of the second clamping hole portion (172) is gradually reduced along a direction away from the first clamping hole portion (171); The buckle (18) comprises: a buckle column (181) and a buckle limiting portion (182); The buckle column (181) is a cylindrical structure, and its radial dimension is arranged to match the width of the end of the second clamping hole portion (172) away from the first clamping hole portion (171); The buckle limiting portion (182) is a regular plate-shaped body, and its area is smaller than the opening size of the first clamping hole portion (171) and larger than the opening size of the end of the second clamping hole portion (172) away from the first clamping hole portion (171).

10. The detachable multi-stage skeleton filter bag according to claim 9, characterized in that: A circular hole structure (173) is provided at one end of the second clamping hole portion (172) away from the first clamping hole portion (171), and the radial dimension of the circular hole structure (173) is greater than the width of the end of the second clamping hole portion (172); A flexible sleeve (181a) is nested outside the buckle column (181), and the radial dimension of the flexible sleeve (181a) is matched with the radial dimension of the circular hole structure (173).

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