A structure for preventing filter bags inside bag filters from falling off

Abstract

The utility model discloses a structure for preventing a filter bag inside a bag filter from falling off, and relates to the technical field of bag filters, comprising: a flower plate, a filter bag, a bag mouth spring clamp and a cage frame; the flower plate is provided with a through hole, the filter bag is inserted into the through hole, and the filter bag and the through hole are expanded and fixed by the bag mouth spring clamp, a cage frame is inserted into the filter bag, and a shield on the top of the cage frame is fixed to the upper surface of the flower plate; the utility model has the following advantages: the filter bag is finally connected to the bolts on the shield through a first rope loop, a tension spring and a second rope loop, so that the filter bag is lifted up, and the filter bag is prevented from falling off due to the loosening of the bag mouth spring clamp; in the process of back-blowing, the pulling force of the tension spring can effectively slow down the downward air blowing force of the gas on the filter bag, and the second rope loop is prevented from being broken or torn.

Description

Technical field:

[0001] The utility model relates to the technical field of bag filters, in particular to a structure for preventing filter bags inside bag filters from falling off. Background technology:

[0002] Bag filters are widely used in boilers and coal chemical industry to filter and separate dust to ensure that the dust content of the gas discharged into the atmosphere meets the requirements. Bag filters have a large filtering capacity. A single device is often designed with hundreds of filter bags. Each filter bag is equipped with a backflush device to blow off the filter dust adhering to the outer surface of the filter bag.

[0003] The existing defects are: the original installation method of the single filter bag of the bag filter uses the elasticity of the spring ring at the bag mouth to expand and fix the filter bag and the circular hole of the flower plate, and then puts the cage frame into the filter bag for support. The annular shield on the head of the cage frame only protects the upper end of the filter bag and has no effect on the fixation of the filter bag. If the elasticity, quality, or installation error of the circular spring ring occurs, the filter bag will often be blown off during the backflush process, causing the filter bag filter to lose its filtering effect. Utility model content:

[0004] The utility model aims to provide a structure for preventing filter bags inside a bag filter from falling off, so as to solve the problems raised in the above-mentioned background technology.

[0005] The utility model is implemented by the following technical solutions:

[0006] A structure for preventing a filter bag inside a bag filter from falling off, comprising: a flower plate, a filter bag, a bag opening spring clamp and a cage frame; the flower plate is provided with a through hole, the filter bag is inserted into the through hole and the filter bag is fixed to the through hole by means of the bag opening spring clamp; a cage frame is inserted into the filter bag, and a shield on the top of the cage frame is fixed to the upper surface of the flower plate;

[0007] At least two pegs are evenly fixed on the shield at the top of the cage frame, and the pegs are connected to one end of the first rope loop. The same number of second rope loops as the pegs is evenly fixed on the inner surface of the middle part of the filter bag, and the first rope loop and the second rope loop are connected by a tension spring.

[0008] Preferably, one end of the second rope loop is sewn to the inner surface of the middle part of the filter bag, and the other end thereof passes through the cage frame and is connected to one end of the tension spring.

[0009] The utility model has the following advantages: the filter bag is finally connected to the pegs on the protective cover through the first rope loop, the tension spring and the second rope loop, so that the filter bag can be lifted up to prevent the filter bag from falling due to the loosening of the spring clamp on the bag mouth; in the process of back-blowing, the pulling force of the tension spring can effectively slow down the downward blowing force of the gas on the filter bag to prevent the second rope loop from being broken or torn. Description of the drawings:

[0010] Figure 1 It is a schematic diagram of the prior art structure;

[0011] Figure 2 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1, flower plate, 2, filter bag, 3, bag mouth spring clamp, 4, cage frame, 4.1, protective cover, 5, bolt, 6, first rope loop, 7, second rope loop, 8, tension spring. Specific implementation method:

[0013] 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.

[0014] See also Figure 1-2 The utility model provides a structural technical solution for preventing the internal filter bag of the bag filter from falling off:

[0015] A structure for preventing a filter bag inside a bag filter from falling off comprises: a flower plate 1, a filter bag 2, a bag opening spring clamp 3 and a cage frame 4; a through hole is arranged on the flower plate 1, the filter bag 2 is inserted into the through hole and the filter bag 2 is fixed to the through hole by expansion through the bag opening spring clamp 3, a cage frame 4 is inserted into the filter bag 2, and a shield 4.1 on the top of the cage frame 4 is fixed to the upper surface of the flower plate 1;

[0016] On the basis of the above-mentioned original installation method, at least two pegs 5 are evenly fixed on the shield 4.1 at the top of the cage frame 4, the heads of the pegs 5 are connected to one end of the first rope loop 6, and the second rope loops 7 having the same number as the pegs 5 are evenly fixed on the inner surface of the middle part of the filter bag 2, one end of the second rope loop 7 is sewn to the inner surface of the middle part of the filter bag 2, and the other end thereof passes through the cage frame 4 and is connected to one end of the tension spring 8, and the other end of the tension spring 8 is connected to the other end connected to the first rope loop 6. The tension spring 8 can buffer the downward force of each filter bag caused by the back-blowing gas, and prevent the filter bag hanging ear from being broken or torn.

[0017] The working principle is as follows: the filter bag 2 is finally connected to the bolt 5 on the protective cover 4.1 through the first rope loop 6, the tension spring 8 and the second rope loop 7, so as to lift the filter bag 2 and prevent the filter bag 2 from falling due to the loosening of the bag mouth spring clamp 3; in the process of backblowing, the tension of the tension spring 8 can effectively slow down the downward air blowing force of the gas on the filter bag 2, and prevent the second rope loop 7 from being broken or torn.

[0018] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for preventing filter bags inside a bag filter from falling off, comprising: A flower plate (1), a filter bag (2), a bag opening spring clamp (3) and a cage frame (4); the flower plate (1) is provided with a through hole, the filter bag (2) is inserted into the through hole and the filter bag (2) is fixed to the through hole by means of the bag opening spring clamp (3); a cage frame (4) is inserted into the filter bag (2), and a protective cover (4.1) at the top of the cage frame (4) is fixed to the upper surface of the flower plate (1); The invention is characterized in that at least two pegs (5) are evenly fixed on the protective cover (4.1) at the top of the cage frame (4), the pegs (5) are connected to one end of the first rope loop (6), and the second rope loops (7) having the same number as the pegs (5) are evenly fixed on the inner surface of the middle part of the filter bag (2), and the first rope loop (6) and the second rope loop (7) are connected by a tension spring (8).

2. The structure for preventing the filter bag inside the bag filter from falling off according to claim 1 is characterized in that: One end of the second rope loop (7) is sewn to the inner surface of the middle part of the filter bag (2), and the other end thereof passes through the cage frame (4) and is connected to one end of the tension spring (8).

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