A dust removal cabin back blowing branch pipe connecting device for a dry dust remover

Abstract

The utility model discloses a dust removal cabin back blow branch pipe connecting device for dry dust collector relates to smelting equipment maintenance technical field. The device includes nitrogen gas supply main pipe and back blow branch pipe, is equipped with first branch pipe joint and second branch pipe joint on nitrogen gas supply main pipe. Back blow branch pipe length is greater than two joint interval, and one end is sealed with first branch pipe joint insertion, and the other end is equipped with the second anti -rotation limit surface of the first anti -rotation limit surface cooperation of second branch pipe joint, and prevents axial displacement through the radial setting of positioning fastener. The utility model discloses through the unique buckle type connecting structure, has replaced traditional hoop and bolt connection, solved the difficult problem of dismounting due to corrosion, realized the quick dismounting of back blow branch pipe, improved the overhaul efficiency and operation safety significantly, guaranteed the connection stability and sealing reliability in the operation process simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of dry dust collector maintenance technology, and in particular relates to a backflush branch pipe connection device for a dry dust collector. Background Technology

[0002] In the gas purification systems of the metallurgical industry, dry dust collectors are one of the key pieces of equipment. Their backflushing system is used to remove dust accumulated on the filter bags to maintain the normal operation of the system. The backflushing branch pipe is an important component of the backflushing system. Currently, this fixed end is generally connected using bolts. However, under harsh conditions of long-term high temperature, high humidity, and the presence of corrosive gases, the fastening bolts are extremely prone to corrosion. This makes the disassembly of the backflushing branch pipe during regular maintenance and filter bag replacement extremely difficult and time-consuming. Furthermore, maintenance work involves confined space operations; the narrow interior space and poor visibility further increase the difficulty and safety risks of disassembly using traditional tools. Sometimes, even gas cutting is required to remove rusted bolts, which not only easily damages the pipe itself but also poses a safety hazard to personnel. Therefore, the existing technology suffers from technical challenges such as inconvenient disassembly of the backflushing branch pipe connection structure, low maintenance efficiency, and safety risks. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a backflush branch pipe connection device for a dry dust collector. The purpose of this utility model is to achieve quick and tool-free disassembly and assembly of the backflush branch pipe, thereby significantly improving maintenance efficiency and ensuring operational safety.

[0004] This utility model is implemented as follows: a backflush branch pipe connection device for a dry dust collector includes a ring-shaped nitrogen supply main pipe and a backflush branch pipe connected to the nitrogen supply main pipe. The backflush branch pipe is provided with a nozzle for blowing nitrogen gas onto the filter bag. The device is characterized in that: a pair of branch pipe joints, a first branch pipe joint and a second branch pipe joint, are arranged opposite each other on the nitrogen supply main pipe; the structural length of the backflush branch pipe is greater than the net distance between the first branch pipe joint and the second branch pipe joint; the first branch pipe joint has a first insertion hole, the geometry of which is related to the backflush branch pipe. The ends of the two pipes have the same geometry and their outer diameters match. A first sealing ring is provided between the backflush branch pipe and the first insertion hole, and the first sealing ring fits against the inner wall of the first branch pipe joint. The second branch pipe joint is provided with a second insertion hole, and the inner wall of the second insertion hole is provided with at least one first anti-rotation limiting surface. A second sealing ring is provided in the second insertion hole. The corresponding end of the backflush branch pipe is provided with a second anti-rotation limiting surface that matches the first anti-rotation limiting surface. A positioning fastener is provided on the second branch pipe joint in the radial direction to prevent the backflush branch pipe from moving axially.

[0005] More preferably, the positioning fastener is a locking screw, which passes through the side wall of the second branch pipe joint and is pressed against the pipe wall of the backflush branch pipe.

[0006] More preferably, the first anti-rotation limiting surface and the second anti-rotation limiting surface together form a polygonal mating structure.

[0007] More preferably, the polygonal mating structure is hexagonal.

[0008] More preferably, the first sealing ring is disposed on the outer circumference of the end of the backflush branch pipe, and the second sealing ring is disposed on the end of the second insertion hole.

[0009] More preferably, the first sealing ring and the second sealing ring are heat-resistant rubber sealing rings.

[0010] The advantages and technical effects of this utility model are as follows: This utility model provides a backflush branch pipe connection device for a dry dust collector, which has significant overall technical effects. Its core lies in completely solving the industry pain point of difficult disassembly caused by the easy corrosion of traditional bolted connections under high temperature, high humidity, and corrosive conditions. Through an innovative structural design of "plug-in + snap-locking," this device achieves rapid assembly and disassembly of the backflush branch pipe. Specifically, the pre-set length difference of the backflush branch pipe and the differentiated fit of the connectors at both ends allow the installation process to be completed in only four simple steps: "insertion, alignment, tightening, and locking." No special tools or forceful disassembly against rusted bolts are required, thus significantly reducing maintenance time from several hours to several minutes, greatly improving maintenance efficiency, and effectively reducing the difficulty and safety risks of operation in confined spaces. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Sectional view of AA; Figure 3 yes Figure 1 BB section view; Figure 4 This is a diagram showing the initial installation state.

[0012] In the diagram: 1. Nitrogen supply main pipe; 2. Backflush branch pipe; 3. First branch pipe connector; 4. Second branch pipe connector; 6. Positioning fastener; 21. Nozzle; 31. First sealing ring; 41. First anti-rotation limiting surface; 42. Second sealing ring; 51. Second anti-rotation limiting surface. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0014] Please see Figures 1 to 4 A backflush branch pipe connection device for a dry dust collector includes a ring-shaped nitrogen supply main pipe 1 and a backflush branch pipe 2 connected to the nitrogen supply main pipe 1. The backflush branch pipe 2 is equipped with nozzles 21 for blowing nitrogen onto the filter bags. A pair of branch pipe joints, a first branch pipe joint 3 and a second branch pipe joint 4, are arranged opposite each other on the nitrogen supply main pipe 1. The structural length of the backflush branch pipe 2 is greater than the net distance between the first branch pipe joint 3 and the second branch pipe joint 4. The first branch pipe joint 3 has a first insertion hole, the geometry of which is the same as the end geometry of the backflush branch pipe 2, and their outer diameters are matched. The backflush branch pipe 2 and the first insertion hole... A first sealing ring 31 is provided between the holes, and the first sealing ring 31 fits against the inner wall of the first branch pipe joint 3; the second branch pipe joint 4 is provided with a second insertion hole, and the inner wall of the second insertion hole is provided with at least one first anti-rotation limiting surface 41. The first anti-rotation limiting surface can be directly machined on the backflushing branch pipe, or a structural component with an anti-rotation limiting surface can be welded on. A second sealing ring 42 is provided in the second insertion hole, and the corresponding end of the backflushing branch pipe 2 is provided with a second anti-rotation limiting surface 51 that cooperates with the first anti-rotation limiting surface 41; a positioning fastener 6 is provided on the second branch pipe joint 4 in the radial direction to prevent the backflushing branch pipe 2 from moving axially.

[0015] This solution achieves a rapid connection mode of "one end plugged in, the other end snapped in" by setting up a pair of structurally differentiated branch pipe joints and limiting the length of the backflush branch pipe to be greater than the joint spacing. The first branch pipe joint provides guidance and initial sealing, while the second branch pipe joint effectively prevents the pipeline from rotating or shifting due to the impact of the backflush airflow through the anti-rotation limiting surface. Combined with radial positioning fasteners, it solves the problems of difficult disassembly and time-consuming maintenance after corrosion of traditional bolted connections, significantly improving disassembly and assembly efficiency and operational safety.

[0016] Preferably, the positioning fastener 6 is a locking screw. The locking screw passes through the side wall of the second branch pipe joint 4 and is tightened against the pipe wall of the backflushing branch pipe 2. The locking screw is equipped with a handle for easy operation. Using a locking screw as the positioning fastener results in a simple structure, low cost, and easy procurement. Its radial tightening method provides reliable axial anti-movement protection, while loosening is simple and does not require special tools, further optimizing the convenience of disassembly.

[0017] Further preferably, the first anti-rotation limiting surface 41 and the second anti-rotation limiting surface 51 together constitute a polygonal mating structure. The polygonal mating structure (such as hexagonal or quadrilateral) can transmit torque, thereby fundamentally eliminating the possibility of relative rotation of the backflushing branch pipe during operation, ensuring the stability of the nozzle blowing direction, and improving the effect and reliability of backflushing cleaning. In this embodiment, the polygonal mating structure is preferably hexagonal.

[0018] More preferably, the first sealing ring 31 is disposed on the outer circumference of the end of the backflush branch pipe 2, and the second sealing ring 42 is disposed on the end of the second insertion hole.

[0019] Technical benefits: By placing the sealing rings on the movable part (the end of the backflush branch pipe) and the fixed part (the insertion hole end of the second branch pipe connector), a highly efficient end-face sealing method is formed. This layout allows the backflush branch pipe to be directly moved axially during disassembly, quickly separating from the sealing ring, avoiding complex operations on the pipe body seals in confined spaces, and greatly simplifying the disassembly and assembly process.

[0020] Preferably, the first sealing ring 31 and the second sealing ring 42 are heat-resistant rubber sealing rings. The heat-resistant rubber material can adapt to the high-temperature operating conditions inside the dust collector, preventing the sealing ring from aging and failing due to high temperature, and preventing the pneumatic pipeline from experiencing sudden vibration, thereby ensuring the long-term sealing reliability and effective use of the connection device in harsh environments.

[0021] The working principle of this connecting device is based on its preset length difference and the mechanical action of "insert first, pull then lock," achieving fast and reliable installation and disassembly. During installation, the operator first fully inserts one end of the backflush branch pipe 2 (usually the end with the first sealing ring 31) into the first insertion hole of the first branch pipe connector 3. At this time, on the side of the second branch pipe connector 4, the end face of the backflush branch pipe 2 is approximately flush with the end face of the second branch pipe connector 4, or there is a small gap of 1-3mm. Next, the second anti-rotation limiting surface 51 of the other end of the backflush branch pipe 2 is aligned with the first anti-rotation limiting surface 41 of the second branch pipe connector 4, and the backflush branch pipe 2 is pushed axially towards the second branch pipe connector 4, so that its end is inserted into the second insertion hole until it is pressed against the second sealing ring 42 at the end of the hole, forming an effective seal. Finally, the pre-installed locking screw (i.e., the positioning fastener 6) is rotated to press against the wall of the backflush branch pipe 2, completing the final axial fixation. Disassembly is much simpler: simply loosen and remove the locking screws, then pull the backflush branch pipe 2 axially out of the second branch pipe joint 4 to separate it from the first branch pipe joint 3, thus completing the entire disassembly process without having to deal with rusted bolts, which greatly improves maintenance efficiency.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A backflush branch pipe connection device for a dry dust collector, comprising a ring-shaped nitrogen supply main pipe (1) and a backflush branch pipe (2) connected to the nitrogen supply main pipe (1), wherein the backflush branch pipe (2) is provided with a nozzle (21) for blowing nitrogen gas onto the filter bag, characterized in that: The nitrogen supply main pipe (1) is provided with a pair of branch pipe joints, namely the first branch pipe joint (3) and the second branch pipe joint (4); the structural length of the backflush branch pipe (2) is greater than the net distance between the first branch pipe joint (3) and the second branch pipe joint (4). The first branch pipe joint (3) is provided with a first insertion hole. The geometry of the first insertion hole is the same as the end geometry of the backflush branch pipe (2), and the outer diameters of the two are matched. A first sealing ring (31) is provided between the backflush branch pipe (2) and the first insertion hole. The first sealing ring (31) is in contact with the inner wall of the first branch pipe joint (3). The second branch pipe joint (4) is provided with a second insertion hole. The inner wall of the second insertion hole is provided with at least one first anti-rotation limiting surface (41). The second insertion hole is provided with a second sealing ring (42). The corresponding end of the backflush branch pipe (2) is provided with a second anti-rotation limiting surface (51) that cooperates with the first anti-rotation limiting surface (41). The second branch pipe joint (4) is provided with a positioning fastener (6) in the radial direction to prevent the backflush branch pipe (2) from moving axially.

2. The backflush branch pipe connection device for a dry dust collector according to claim 1, characterized in that: The positioning fastener (6) is a locking screw, which passes through the side wall of the second branch pipe joint (4) and is pressed against the pipe wall of the backflush branch pipe (2).

3. The backflush branch pipe connection device for a dry dust collector according to claim 1, characterized in that: The first anti-rotation limiting surface (41) and the second anti-rotation limiting surface (51) together form a polygonal mating structure.

4. The backflush branch pipe connection device for a dry dust collector according to claim 3, characterized in that: The polygonal mating structure is hexagonal.

5. The backflush branch pipe connection device for a dry dust collector according to claim 1, wherein the first sealing ring (31) is disposed on the outer circumference of the end of the backflush branch pipe (2), and the second sealing ring (42) is disposed on the end of the second insertion hole.

6. The backflush branch pipe connection device for a dry dust collector according to claim 1, characterized in that: The first sealing ring (31) and the second sealing ring (42) are heat-resistant rubber sealing rings.

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