Pinhole-free anti-static filter bag

Abstract

A pinhole-free anti-static filter bag comprises a framework and a filter bag body capable of completely covering the framework, the filter bag body comprises an inner-layer filter bag and an outer-layer filter bag, and the framework is supported between the inner-layer filter bag and the outer-layer filter bag; the framework is made of conductive metal and comprises a plurality of spaced longitudinal ribs which are enclosed into a ring shape, and the framework is connected and fixed through a plurality of spaced connecting rings in the transverse direction. The outer-layer filter bag is bonded with the upper end of the inner-layer filter bag after being turned inwards from the upper end of the framework to the inner-layer filter bag to finish closing. The anti-static filter bag is good in anti-static effect and convenient to install, and the problem that the filter bag is damaged and the filter efficiency is influenced due to the fact that the bag head part is sewn by a needle and a thread can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of filter bag manufacturing, in particular to an anti-static filter bag without pinholes. Background Art

[0002] Dust filter bags accumulate dust during use. The friction between the dust particles generates static electricity. If the static electricity on the surface of the filter bag is not eliminated in time, it can easily cause an explosion and affect production safety. There are two main methods to eliminate static electricity accumulation in filter bags: one is to add conductive fibers to the blending process or use antistatic base cloth to prepare filter materials with antistatic properties, so that the filter bags can conduct static electricity during use. However, the conductive fibers are unevenly distributed in the filter material, and the conductivity is not good enough; the other is to coat the surface of ordinary filter materials with a conductive layer such as a graphene layer through finishing technology. The filter bags produced by this method have good conductivity, but the conductivity is time-sensitive and the cost of use is high. In addition, the connection method between the bag body and the bag mouth of the dust filter bag has always been sewing, such as three-needle or five-needle sewing. This can easily damage the filter bag, causing the filter bag to leak powder during operation, affecting the filtration efficiency of the entire filter bag. Utility Model Content

[0003] The purpose of the utility model is to provide an anti-static filter bag without pinholes, which has good anti-static effect, is easy to install, and can avoid the problem that the bag head is damaged by sewing with needle and thread, thereby affecting the filtering efficiency.

[0004] In order to achieve the above objectives, the solution of the present invention is:

[0005] A pinhole-free antistatic filter bag comprises a frame and a filter bag body that can completely cover the frame, the filter bag body comprising an inner filter bag and an outer filter bag, the frame being supported between the inner filter bag and the outer filter bag; the frame is made of conductive metal, the frame comprising a plurality of spaced longitudinal ribs forming a ring, and being connected and fixed in the transverse direction by a plurality of spaced connecting rings; the outer filter bag is rolled inwardly at the upper end of the frame toward the inner filter bag, and then bonded to the upper end of the inner filter bag to complete closure.

[0006] Furthermore, the conductive metal is stainless steel.

[0007] Furthermore, the material of the filter bag body is polyester, acrylic, polyphenylene sulfide, polyester or polyurethane.

[0008] Furthermore, the filter bag body forms a bag head at the upper end of the frame and a bag bottom at the lower end. The outer filter bag is bonded to the inner filter material after wrapping the bag head. The outer filter bag and the inner filter bag are hot-melt connected in the outer area of ​​the frame and at the bag bottom.

[0009] Furthermore, an upper connecting ring is provided at the upper end of the frame, and the upper end of each longitudinal rib is connected to the upper connecting ring. The outer filter bag is rolled inward toward the inner filter bag after passing the upper connecting ring at the upper end of the frame.

[0010] Furthermore, the skeleton is formed by 8 longitudinal reinforcements, a bottom plate is provided at the bottom end of the skeleton, the bag bottom is located at the bottom of the bottom plate, and at least 3 spaced connecting rings are connected to the 8 longitudinal reinforcements and are located between the upper connecting ring and the bottom plate, and the inner side of the longitudinal reinforcement is welded to the connecting ring.

[0011] Furthermore, the inner filter bag and the outer filter bag are supported on the skeleton, and a gap is formed between the inner filter bag and the outer filter bag on the outside of the skeleton, and the gap is filled with filter material.

[0012] Furthermore, the filter material is filter fiber, activated carbon powder or catalyst.

[0013] After adopting the above structure, the utility model uses a skeleton supported by conductive metal as an internal support to prevent the accumulation of static electricity and replace the conventional bag cage. The filter bag and the bag cage are directly combined and can be installed and transported at one time. The inner and outer filter bags are attached to the skeleton, and the outer filter bag is attached to the inside of the bag head and bonded to the inner filter bag, avoiding the risk of needle holes formed by the back and forth movement of the needle when sewing the bag head and bag body, resulting in dust leakage during filtration. The filter bag of the utility model has the advantages of good anti-static effect and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the skeleton in the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the utility model (the filter bag body is connected to the skeleton);

[0016] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 4 for Figure 3 A partial enlarged view of point A in the middle (showing the connection between the inner and outer filter bags at the bag head). DETAILED DESCRIPTION

[0018] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0019] Combine Figures 1 to 4 As shown, the utility model discloses a pinhole-free anti-static filter bag, comprising a skeleton 1 and a filter bag body 2 that can completely cover the skeleton, the filter bag body 2 comprising an inner filter bag 22 and an outer filter bag 21, and the skeleton support 1 is between the inner filter bag 22 and the outer filter bag 21.

[0020] The skeleton 1 comprises a plurality of spaced longitudinal bars 11 which are enclosed in a ring shape and are connected and fixed in the transverse direction by a plurality of spaced connecting rings 12. An upper connecting ring 14 is further arranged at the upper end of the skeleton 1, and the upper ends of the longitudinal bars 11 are connected (welded) to the upper connecting ring 14. In the embodiment, the skeleton 1 can comprise eight longitudinal bars which are enclosed to form the skeleton 1, and the bottom end of the skeleton 1 is provided with a bottom plate 13, and the bag bottom of the filter bag is located at the bottom of the bottom plate 13. At least three connecting rings 12 which are arranged at intervals are connected to the eight longitudinal bars and are located between the upper connecting ring 14 and the bottom plate 13, and the inner side of the longitudinal bar 11 can be welded to the connecting ring 12. The skeleton 1 is made of a conductive metal such as stainless steel, and the skeleton 1 can prevent the accumulation of static electricity (a small amount of conductive fiber contained in the filter cloth can conduct the static electricity accumulated on the outer layer to the skeleton and then to the outside, for example, through the upper end of the skeleton to the flower plate), and can replace the conventional bag cage to facilitate installation (the filter bag and the bag cage are directly combined, and only one installation and one transportation are required), and the two functions are achieved at one time.

[0021] For the connection between the outer filter bag 21 and the inner filter bag 22, the outer filter bag 21 can be inwardly rolled at the upper end of the skeleton 1 towards the inner filter bag 22 and then adhered to the upper end of the inner filter bag 22 to complete the closure. The filter bag body 2 forms a bag head at the upper end of the skeleton 1 and a bag bottom at the lower end, the outer filter bag 21 is adhered to the inner filter bag 22 after wrapping the bag head, and the outer filter bag 2 can be rolled inwardly at the upper end of the skeleton 1 towards the inner filter bag after passing around the upper connecting ring 14. The outer filter bag 21 and the inner filter bag 22 are connected by hot melting at the outer area of the skeleton and the bag bottom, that is, the two layers of filter bags on the side of the skeleton 1 are connected, and the outer filter bag 21 and the inner filter bag 21 at the bag bottom are connected by hot melting.

[0022] The material of the filter bag body 2 can be polyester, acrylic, polyphenylene sulfide, polyester or polyurethane.

[0023] Further, the inner filter bag 22 and the outer filter bag 21 are supported on the skeleton 1, and part of the pores are formed between the inner filter bag 22 and the outer filter bag 21. These pores can be filled with different filter materials according to different working conditions, such as filter fibers (such as PPS, PTFE or glass fiber) with better filtering effect, activated carbon powder, catalyst and the like, which can improve the functionality while ensuring the overall filtering precision. For the filling of the filter material, a part of the outer side of the skeleton 1 between the inner filter bag 22 and the outer filter bag 21 can be filled with the filter material and then vacuumized. After vacuumization, the filter material can be gathered at the outer periphery of the skeleton 1, and then hot melting is performed. Since the skeleton is between the inner filter bag and the outer filter bag, the filling filter material can avoid forming empty bags or bulges on both sides of the skeleton during vacuumization.

[0024] After adopting the above structure, the utility model can have the following advantages:

[0025] 1. By using a skeleton made of conductive metal as the supporting body, the skeleton as the internal support can not only prevent the accumulation of static electricity but also replace the conventional bag cage for easy installation. Unlike traditional filter bags, there is no need for cumbersome installation. The filter bag and bag cage are directly combined into one. Only one installation and one transportation are required, which saves time and simplifies the entire installation process.

[0026] 2. The filter bag consists of two layers of inner and outer filter bags that wrap the frame, so that the outer filter bag is bonded to the inner filter bag inside, so that there are no pinholes in the outer layer of the entire filter bag, which solves the problem that most bag heads on the market are sewn with needle and thread, causing damage to the filter bag, thereby affecting the filtration efficiency.

[0027] 3. The utility model can also increase the filtering function of the filter bag to improve the overall functionality of the filter bag.

[0028] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A pinhole-free anti-static filter bag, characterized by: It includes a skeleton and a filter bag body that can completely cover the skeleton. The filter bag body includes an inner filter bag and an outer filter bag. The skeleton is supported between the inner filter bag and the outer filter bag. The skeleton is made of conductive metal. The skeleton includes multiple spaced longitudinal ribs to form a ring, and is connected and fixed in the transverse direction by multiple spaced connecting rings. The outer filter bag is rolled inward toward the inner filter bag at the upper end of the skeleton and then bonded to the upper end of the inner filter bag to complete the closure.

2. The pinhole-free antistatic filter bag according to claim 1, characterized in that: The conductive metal is stainless steel.

3. The pinhole-free antistatic filter bag according to claim 1, characterized in that: The material of the filter bag body is polyester, acrylic, polyphenylene sulfide, polyester or polyurethane.

4. The pinhole-free antistatic filter bag according to claim 1, characterized in that: The filter bag body forms a bag head at the upper end of the frame and a bag bottom at the lower end. The outer filter bag is bonded to the inner filter material after wrapping the bag head. The outer filter bag and the inner filter bag are hot-melt connected in the outer area of ​​the frame and at the bag bottom.

5. The pinhole-free antistatic filter bag according to claim 1 or 4, characterized in that: An upper connecting ring is provided at the upper end of the frame, and the upper end of each longitudinal rib is connected to the upper connecting ring. The outer filter bag passes over the upper connecting ring at the upper end of the frame and then curls inward toward the inner filter bag.

6. The pinhole-free antistatic filter bag according to claim 4, characterized in that: The skeleton is formed by 8 longitudinal reinforcements. A bottom plate is provided at the bottom end of the skeleton. The bag bottom is located at the bottom of the bottom plate. At least 3 spaced connecting rings are connected to the 8 longitudinal reinforcements and are located between the upper connecting ring and the bottom plate. The inner side of the longitudinal reinforcement is welded to the connecting ring.

7. The pinhole-free antistatic filter bag according to claim 1 or 4, characterized in that: The inner filter bag and the outer filter bag are supported on the frame, and a gap is formed between the inner filter bag and the outer filter bag on the outside of the frame, and the gap is filled with filter material.

8. The pinhole-free antistatic filter bag according to claim 7, characterized in that: The filter material is filter fiber, activated carbon powder or catalyst.

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