Laminated needled felt for filter bag

Abstract

The utility model discloses a film-coated needled felt for a filter bag, and relates to the technical field of smoke dust filtration and related accessories thereof. The needled felt comprises a needled felt body and expansion bags sewn at the top and the bottom of the outer wall of the needled felt body, hanging rings are evenly sewn on the outer side of the outer wall of the needled felt body at intervals, elastic bands are arranged in the hanging rings, and the needled felt body is formed by combining PPS fiber base cloth, a film covering layer, a high-temperature-resistant acid-corrosion-resistant layer, an elastic layer, a waterproof layer and a wear-resistant layer. The PPS fiber base cloth, the film covering layer, the high-temperature-resistant acid etching layer, the elastic layer, the waterproof layer and the wear-resistant layer are sequentially arranged from inside to outside, and a stabilizing assembly is arranged in the expansion bag. The stability of the needled felt body after installation can be improved through the elastic bands and the stabilizing assemblies, the waterproof layer can enable the needled felt body to have the waterproof, hydrophobic and anti-permeation functions, and the situation that the filtering performance of the needled felt body is affected and the filtering pressure of the needled felt body is increased due to the fact that the needled felt body absorbs water after meeting the water is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of smoke and dust filtering and related accessories, in particular to a film-coated needle-punched felt for a filter bag. Background Art

[0002] Needle felt is a material made by non-woven needle-punching technology using a fine fiber cloth with staggered fibers and uniform gap distribution. The surface of the needle felt produced by polyester staple fiber and polyester twisted yarn is post-processed by hot rolling, singeing or coating. In dust removal equipment, coated needle felt can be used as the raw material of filter bags. It has the advantages of high filtration accuracy, good air permeability and long service life.

[0003] However, it still has the following disadvantages in actual use:

[0004] 1. Most of the existing film-coated needle felt for filter bags are directly placed on the outside of the internal installation frame when in use. However, this method has poor positioning, installation effect and stability for the film-coated needle felt for filter bags, which may affect its normal use;

[0005] 2. The existing film-coated needle felt for filter bags has poor waterproof performance when in use, which may affect the filtering performance of the film-coated needle felt for filter bags and increase its own filtering pressure. To this end, we provide a film-coated needle felt for filter bags to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a coated needle felt for a filter bag, which can improve the stability of the needle felt body after installation by arranging an elastic band and a stabilizing component, and prevent the needle felt body from falling off during use, and utilize the waterproof base film, the polymer anti-permeability film and the hydrophobic film in the waterproof layer to make the needle felt body have the effects of waterproof, hydrophobic and anti-permeability, and prevent the needle felt body from absorbing water after meeting water, affecting its own filtering performance and increasing its own filtering pressure.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model discloses a film-coated needle felt for filter bags, comprising a needle felt body and expansion bags sewn on the top and bottom of the outer wall thereof, the outer side of the outer wall of the needle felt body is sewn with hanging rings at even intervals, the inside of the hanging rings is provided with elastic bands, the needle felt body is composed of a PPS fiber base cloth, a film layer, a high temperature acid-etching resistant layer, an elastic layer, a waterproof layer and a wear-resistant layer, and the PPS fiber base cloth, the film layer, the high temperature acid-etching resistant layer, the elastic layer, the waterproof layer and the wear-resistant layer are arranged in sequence from the inside to the outside, and a stabilizing component is arranged inside the expansion bag;

[0009] The stabilizing component comprises a left clamping ring and a right clamping ring which is symmetrically arranged on one side of the expansion bag center. The front and rear ends of the inner wall of the right clamping ring are fixedly connected with fixing rods.

[0010] The utility model is further configured that a pressure strip is arranged at the bottom edge of the outer wall of the needle felt body, plug plates are evenly spaced at the bottom of the needle felt body along the circumferential direction, and a through hole is opened at the center of the outer wall of the plug plate.

[0011] The utility model is further configured that the waterproof layer is composed of a waterproof base membrane, a polymer anti-permeability membrane and a hydrophobic membrane, and the waterproof base membrane, the polymer anti-permeability membrane and the hydrophobic membrane are arranged in sequence from the inside to the outside.

[0012] The utility model is further configured that the coating layer, the high temperature acid-etching resistant layer, the elastic layer, the waterproof layer and the wear-resistant layer are bonded together by an adhesive layer, and the waterproof base film, the polymer anti-penetration film and the hydrophobic film are pressed together by hot glue.

[0013] The utility model is further configured that the left clamping ring and the right clamping ring are both provided with clamping grooves at the center positions relative to the inner wall, and the inner wall of the left clamping ring is both provided with moving grooves at the front and rear ends.

[0014] The utility model is further configured that the other end of the fixing rod passes through a through hole on one end surface of the fixing plate and is connected to the limiting plate, and a spring is sleeved on the outer side of the outer wall of the fixing rod.

[0015] The utility model is further configured that the spring is located between the limiting plate and the fixing plate, and the outer wall of the fixing plate is fixed to the outer edge of the inner wall of the movable groove.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model provides elastic bands and stabilizing components, and utilizes multiple elastic bands to make the outer wall of the needle felt body tight to the outer wall of the internal support frame at various locations, thereby playing a role of preliminary stability. At the same time, the positions of the left clamping ring and the right clamping ring can be adjusted under the elastic performance of the spring, so that the two are clamped on the outer wall of the internal support frame to play a limiting role, further improving the stability of the needle felt body after installation, and preventing the needle felt body from falling off during use. This solves the problem that the existing coated needle felt for filter bags is mostly directly sleeved on the outside of the internal installation frame when in use, and this method has poor limiting, installation effect and stability for the coated needle felt for filter bags, which may affect its normal use.

[0018] 2. The utility model provides a waterproof layer. Under the action of the waterproof base film, the polymer anti-permeation film and the hydrophobic film in the waterproof layer, the needle-punched felt body can be made waterproof, hydrophobic and anti-permeation, so as to avoid the needle-punched felt body absorbing water after contacting with water, affecting its own filtering performance and increasing its own filtering pressure, thereby solving the problem that the existing film-coated needle-punched felt for filter bags has poor waterproof performance when in use, which may affect the filtering performance of the film-coated needle-punched felt for filter bags and increase its own filtering pressure.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The present invention is a schematic diagram of the structure of a membrane-coated needle felt for filter bags.

[0022] Figure 2 The present invention is a cross-sectional view of a membrane-coated needle felt for filter bags.

[0023] Figure 3 This is a disassembled diagram of the stabilizing assembly.

[0024] Figure 4 This is a diagram of the internal structure of the needle felt body.

[0025] Figure 5 This is a diagram of the internal structure of the waterproof layer.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1-needle felt body, 101-hanging ring, 102-elastic belt, 103-expansion bag, 104-pressing strip, 105-insertion plate, 106-PPS fiber-based cloth, 107-coating layer, 108-high temperature acid-etching resistant layer, 109-elastic layer, 1010-waterproof layer, 10101-waterproof base membrane, 10102-polymer anti-permeability membrane, 10103-hydrophobic membrane, 1011-wear-resistant layer, 2-stabilizing component, 201-left snap ring, 2011-slot, 2012-moving slot, 202-right snap ring, 203-fixing rod, 2031-limiting plate, 204-fixing plate, 205-spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0030] See also Figure 1 , 2 , 4, 5. The utility model is a coated needle felt for filter bags, comprising a needle felt body 1 and expansion bags 103 sewn on the top and bottom of the outer wall thereof, and hanging rings 101 are sewn at even intervals on the outer side of the outer wall of the needle felt body 1. The needle felt body 1 is composed of a PPS fiber base cloth 106, a coating layer 107, a high temperature acid-etching resistant layer 108, an elastic layer 109, a waterproof layer 1010 and a wear-resistant layer 1011, and the PPS fiber base cloth 106, the coating layer 107, the high temperature acid-etching resistant layer 108, the elastic layer 109, the waterproof layer 1010 and the wear-resistant layer 1011 are arranged in sequence from the inside to the outside.

[0031] Specifically, a layering strip 104 is provided at the bottom edge of the outer wall of the needle-punched felt body 1, and plug plates 105 are evenly spaced at intervals along the circumferential direction at the bottom of the needle-punched felt body 1, and a through hole is opened at the center of the outer wall of the plug plate 105. The waterproof layer 1010 is composed of a waterproof base membrane 10101, a polymer anti-permeability membrane 10102 and a hydrophobic membrane 10103, and the waterproof base membrane 10101, the polymer anti-permeability membrane 10102 and the hydrophobic membrane 10103 are arranged in sequence from the inside to the outside, the coating layer 107, the high temperature acid-etching resistant layer 108, the elastic layer 109, the waterproof layer 1010 and the wear-resistant layer 1011 are bonded by an adhesive layer, and the waterproof base membrane 10101, the polymer anti-permeability membrane 10102 and the hydrophobic membrane 10103 are pressed together by hot glue.

[0032] Furthermore, the pressure strip 104 can be used to press the port of the needle felt body 1 against the outer wall of the support frame, and the plug plate 105 and the through holes on its surface provide convenience for installing the needle felt body 1. The waterproof base membrane 10101, the polymer anti-permeability membrane 10102 and the hydrophobic membrane 10103 can improve the waterproof and hydrophobic properties of the needle felt body 1. The high-temperature acid-etching resistant layer 108 and the wear-resistant layer 1011 can improve the performance of the needle felt body 1 itself and increase its service life.

[0033] The operation process of this embodiment is as follows: by setting the high temperature acid-etching resistant layer 108 on the outside of the PPS fiber-based cloth 106, the needle-punched felt body 1 can be used in a high temperature and highly corrosive environment to increase its service life, and the elastic layer 109 can greatly improve the elastic performance of the needle-punched felt body 1 and increase its own toughness. At the same time, under the action of the waterproof base membrane 10101, the polymer anti-permeability membrane 10102 and the hydrophobic membrane 10103 in the waterproof layer 1010, the needle-punched felt body 1 can have the effects of waterproof, hydrophobic and anti-permeability, avoiding the needle-punched felt body 1 from absorbing water after encountering water and affecting its own filtering performance, as well as increasing its own pressure. Finally, by setting the wear-resistant layer 1011 on the outermost side, the wear resistance of the needle-punched felt body 1 can be improved and its service life can be increased. Specific embodiment 2

[0035] See also Figures 2 to 3 On the basis of the specific embodiment 1, what is different from the first embodiment is that: a stabilizing component 2 and an elastic band 102 are provided, the stabilizing component 2 includes a left snap ring 201 and a right snap ring 202 which is symmetrically arranged on one side of the expansion bag 103 with respect to the center, and the front and rear ends of the inner wall of the right snap ring 202 are fixedly connected with a fixing rod 203, which solves the existing problem.

[0036] Specifically, the left snap ring 201 and the right snap ring 202 are both provided with a slot 2011 at the center position of the inner wall, and the front and rear ends of the inner wall of the left snap ring 201 are both provided with a movable slot 2012. The other end of the fixed rod 203 passes through the through hole on the end face of one side of the fixed plate 204 and is connected to the limiting plate 2031. A spring 205 is sleeved on the outer side of the outer wall of the fixed rod 203, and the spring 205 is located between the limiting plate 2031 and the fixed plate 204. The outer wall of the fixed plate 204 is fixed at the outer edge of the inner wall of the movable slot 2012.

[0037] Furthermore, the left snap ring 201 and the right snap ring 202 have the same shape and size. The left snap ring 201 and the right snap ring 202 are clamped on the outer wall of the internal support frame by using the clamping groove 2011, and the right snap ring 202 and the limit plate 2031 are connected by the fixing rod 203, which plays the role of connecting transmission, and the left snap ring 201 and the right snap ring 202 are moved under the action of the elastic performance of the spring 205.

[0038] The operation process of this embodiment is as follows: first, the port of the needle felt body 1 is stretched open, then the needle felt body 1 is sleeved on the outer side of the outer wall of the support frame and pulled to the innermost side, then the port is sealed with the pressure strip 104, and at the same time, the elastic bands 102 at various positions are adjusted so that the outer wall of the needle felt body 1 can be tightly attached to the outer wall of the internal support frame at various positions to play a preliminary stabilizing role, and then the left and right snap rings 201 and 202 at the upper and lower sides are pulled to both sides, and the left and right snap rings 201 and 202 are forced to move outward, wherein the right snap ring 202 pulls the limit plate 2031 through the fixing rod 203, and will be with the The fixing plate 204 cooperates with the extrusion spring 205 to stretch the left snap ring 201 and the right snap ring 202 apart, and then the grooves 2011 on the inner walls of the left snap ring 201 and the right snap ring 202 are clamped on the outer side of the convex ring on the support frame, and the force applied to the left snap ring 201 and the right snap ring 202 is stopped. At this time, under the action of the elastic performance of the spring 205, the limiting plate 2031 is applied with force, so that the left snap ring 201 and the right snap ring 202 are brought close to each other and clamped on the outer wall of the convex ring on the support frame, thereby playing a limiting role, further improving the stability of the needle felt body 1 after installation, and preventing the needle felt body 1 from falling off during use.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coated needle felt for a filter bag, comprising a needle felt body (1) and expansion bags (103) sewn on the top and bottom of its outer wall, wherein the outer side of the outer wall of the needle felt body (1) is sewn with hanging rings (101) at even intervals, and characterized in that: An elastic band (102) is arranged inside the hanging ring (101); the needle felt body (1) is composed of a PPS fiber base cloth (106), a coating layer (107), a high temperature acid erosion resistant layer (108), an elastic layer (109), a waterproof layer (1010) and a wear-resistant layer (1011); and the PPS fiber base cloth (106), the coating layer (107), the high temperature acid erosion resistant layer (108), the elastic layer (109), the waterproof layer (1010) and the wear-resistant layer (1011) are arranged in sequence from the inside to the outside; and a stabilizing component (2) is arranged inside the expansion bag (103); The stabilizing assembly (2) comprises a left clamping ring (201) and a right clamping ring (202) arranged symmetrically about the center of the expansion bag (103) on one side thereof, and the front and rear ends of the inner wall of the right clamping ring (202) are fixedly connected to fixing rods (203).

2. The film-coated needle felt for filter bag according to claim 1, characterized in that: A pressure strip (104) is provided at the bottom edge of the outer wall of the needle felt body (1), and plug plates (105) are evenly spaced at the bottom of the needle felt body (1) along the circumferential direction, with a through hole being provided at the center of the outer wall of the plug plate (105).

3. The film-coated needle felt for filter bag according to claim 2, characterized in that: The waterproof layer (1010) is composed of a waterproof base film (10101), a polymer anti-permeability film (10102) and a hydrophobic film (10103), and the waterproof base film (10101), the polymer anti-permeability film (10102) and the hydrophobic film (10103) are arranged in sequence from the inside to the outside.

4. The film-coated needle felt for filter bag according to claim 3, characterized in that: The coating layer (107), the high temperature acid-etching resistant layer (108), the elastic layer (109), the waterproof layer (1010) and the wear-resistant layer (1011) are bonded together by means of an adhesive layer, and the waterproof base film (10101), the polymer anti-permeability film (10102) and the hydrophobic film (10103) are bonded together by means of hot glue.

5. The film-coated needle felt for filter bag according to claim 1, characterized in that: The left snap ring (201) and the right snap ring (202) are both provided with snap grooves (2011) at the center of the inner wall, and the inner wall of the left snap ring (201) is provided with movement grooves (2012) at both the front and rear ends.

6. The film-coated needle felt for filter bag according to claim 5, characterized in that: The other end of the fixing rod (203) passes through a through hole on one end surface of the fixing plate (204) and is connected to the limiting plate (2031). A spring (205) is sleeved on the outer side of the outer wall of the fixing rod (203).

7. The film-coated needle felt for filter bag according to claim 6, characterized in that: The spring (205) is located between the limiting plate (2031) and the fixing plate (204), and the outer wall of the fixing plate (204) is fixed to the outer edge of the inner wall of the movable groove (2012).

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