A coal gas filter cartridge fixing frame

Abstract

The application discloses a coal gas filter element fixing frame, which comprises a columnar shell (1), a positioning rod (3) in the columnar shell (1) is in sliding connection with a positioning hole (21) of a filter element (2), a sealing gasket (4) and a pressing plate (5) are arranged above the filter element (2), a through hole (6) is formed in the sealing gasket (4) and the pressing plate (5), the positioning rod (3) is connected with a pressing nut (7) after being upwardly penetrated through the through hole (6), an isolation cover (8) is arranged above the uppermost pressing plate (5), sliding blocks (81) at two sides of the isolation cover (8) are correspondingly embedded in sliding grooves (1b) at two sides of the columnar shell (1), a fixing hole (82), a fixing groove (83) and a locking nut (84) are arranged on the isolation cover (8), and the positioning rod (3) is connected with the locking nut (84) after being upwardly penetrated through the fixing hole (82). The coal gas filter element fixing frame has the advantages that the filter element can be quickly and accurately positioned and installed, the sealing property in the filtering process is effectively improved, coal gas leakage is prevented, the structural stability is enhanced, and the filtering effect is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of gas filtration equipment, and particularly relates to a gas filter element fixing bracket. Background Technology

[0002] In the coal gas transmission and purification process system, the coal gas filter is a core supporting device that ensures the stable operation of downstream gas-using equipment. Its core function is to remove impurities such as dust, tar, and hydrogen sulfide entrained in the coal gas, preventing these impurities from entering pipelines, burners, or subsequent process equipment and causing blockages, corrosion, and other malfunctions. As a key functional component inside the filter that achieves gas-solid separation, the accuracy of its installation and sealing performance directly determines the overall filtration efficiency and operational safety of the filter.

[0003] Currently, most traditional gas filter cartridge fixing structures use simple external bolts for direct locking or a split-type snap-fit ​​assembly method. These structures have many defects in long-term industrial operation: Firstly, the positioning accuracy is seriously insufficient. After the filter element is installed in the housing, the operator needs to repeatedly adjust the position to align the inlet and outlet of the filter element with the flow channel inside the housing. This not only greatly prolongs the installation and replacement time, but also easily causes irregular gaps between the outer wall of the filter element and the inner wall of the housing due to deviations in manual adjustment. Unfiltered gas containing impurities will directly enter the outlet side through these gaps, completely bypassing the filter layer of the filter element, greatly reducing the gas purification accuracy, and even directly causing abnormal wear of downstream gas-using equipment.

[0004] Secondly, there is a lack of sealing performance. The contact points between the fixing bolts, clips, and the filter element lack specific sealing protection structures. Highly corrosive hydrogen sulfide, viscous tar, and other impurities carried in the gas gradually seep into the bolt thread gaps and clip mating joints, rapidly causing metal parts to corrode, coke, and seize up under long-term high-temperature and high-humidity conditions. When maintenance personnel need to periodically disassemble and replace the filter element, the corroded bolts cannot be properly tightened. Often, the old fixing frame must be removed by force, such as cutting or hammering, which not only significantly increases the on-site maintenance workload but also easily causes irreversible damage to the filter housing, directly increasing the equipment's total life-cycle cost.

[0005] To address the aforementioned issues, existing technologies have made corresponding improvements, such as adding a single-layer rubber gasket to the edge of the filter element or replacing the external bolts with rust-proof coated bolts. However, these improvements can only alleviate corrosion problems in a very short period of time and cannot fundamentally solve the problem of filter element installation positioning deviation. They also do not form a multi-level sealing and protection system. At the same time, the exposed locking bolts are still prone to stripping and deformation due to external impacts under complex working conditions in the factory area. They still cannot meet the multiple usage requirements of high-precision positioning, long-term sealing and convenient operation and maintenance. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of poor positioning accuracy and insufficient sealing of existing filter element fixing structures. It provides a gas filter element fixing bracket that can achieve rapid and accurate positioning and installation, effectively improve the sealing of the filtration process, prevent gas leakage, enhance structural stability, and improve filtration efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A gas filter element holder includes a cylindrical housing for holding the filter element. An inlet pipe and an outlet pipe are connected to the cylindrical housing. The bottom of the cylindrical housing is also provided with a slag discharge port. The slag discharge port is provided with a threaded and detachable connecting cover, which facilitates regular cleaning of the residue generated by filtration, keeps the inside of the filter clean, and ensures stable filtration efficiency.

[0008] The cylindrical outer shell houses a set of vertical positioning rods. The filter element itself has a set of through-hole positioning holes. The positioning rods and holes mate accordingly, forming a sliding connection. The upper end of the positioning rod extends out of the positioning hole and is threaded. The top of the filter element features a combination of a sealing gasket and a pressure plate, both with through holes. The positioning rod passes through the corresponding through hole and is then fastened upwards to a tightening nut via the connecting thread. This structure not only ensures higher installation accuracy through the sliding connection between the positioning rods and holes, but also creates a multi-layered sealing structure through the combination of the sealing gasket and pressure plate, effectively improving the sealing performance of the filtration process and preventing gas leakage.

[0009] Above the topmost pressure plate is an isolation cover. Sliding blocks are located on both sides of the isolation cover, engaging with sliding grooves on the inner wall of the cylindrical outer shell. The sliding blocks are embedded into the corresponding sliding grooves. A fixing hole matching the positioning rod is also provided through the isolation cover. A fixing groove, larger in diameter than the fixing hole, is located at the top of the fixing hole. A locking nut is installed within the fixing groove, and the portion of the positioning rod extending out of the fixing hole is securely connected to the locking nut. This structure, by sliding the blocks along the sliding grooves on the inner wall of the cylindrical outer shell, combined with the locking nut in the fixing groove and the bottom sealing ring, achieves a reliable seal at the top while concealing the locking nut within the fixing groove, preventing damage from external impacts and enhancing structural stability.

[0010] The top of the cylindrical housing is also provided with a top cover, which is connected to the cylindrical housing through a disassembly threaded port on the outer wall of the cylindrical housing.

[0011] Compared with the prior art, the advantages of the technical solution of the present invention are as follows: (1) The present invention achieves one-step alignment when the filter element is installed into the cylindrical shell by sliding fit design of positioning rod and filter element positioning hole, without the need for manual repeated adjustment of position to align the inlet and outlet, which greatly improves positioning accuracy and installation alignment efficiency, completely avoids gap between filter element and inner wall of shell caused by installation deviation, and fundamentally prevents unfiltered gas from directly entering the gas outlet pipe, thus improving filtration efficiency. (2) The present invention adopts a double sealing structure to achieve long-term protection. On the one hand, it completely blocks the path of gas leakage from the filter element installation gap to the outside. On the other hand, it can effectively block corrosive impurities such as hydrogen sulfide and tar in the gas from entering the fixed thread gap, extend the corrosion resistance life of the fixed parts, prevent the bolts from rusting and jamming, and maintain normal disassembly. (3) The present invention adopts a hidden locking structure, which enhances the structural stability. The isolation cover is precisely assembled along the sliding groove of the inner wall of the columnar shell by the sliding block. The locking nut is completely stored in the fixed groove. Combined with the bottom sealing ring, the top is fully sealed. This not only avoids the stripping and deformation damage of the nut caused by external collision under complex working conditions, but also further enhances the top sealing effect, ensuring that the isolation cover will not loosen or shift during long-term operation of the equipment. (4) The slag discharge port of the present invention adopts a threaded detachable connection cover, which allows maintenance personnel to quickly open and clean the deposited dust and tar residue without disassembling the main filter element structure, shortening the cleaning operation time, keeping the internal flow channel of the filter open for a long time, avoiding residue accumulation and clogging of the filter element air inlet surface, extending the effective filtration cycle of the filter element, and maintaining a stable high filtration efficiency throughout the process. (5) The present invention also significantly reduces the overall cost of filter element replacement and equipment maintenance. It eliminates the need for violent disassembly of rusted parts, avoids human-caused damage to the filter housing, and effectively prevents abnormal shutdowns of downstream gas-using equipment caused by impurities due to leakage and bypass filtration characteristics, thus providing reliable support for the continuous and stable operation of the gas purification system. Attached Figure Description

[0012] Figure 1 This is an exploded view of the gas filter element fixing bracket structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the gas filter element fixing bracket of the present invention; Figure 3 This is a schematic diagram of the isolation cover structure of the present invention. Detailed Implementation Example

[0013] To make the present invention clearer, a gas filter element fixing bracket of the present invention will be further described below with reference to the accompanying drawings. The specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0014] See Figure 1 and Figure 2 A gas filter element holder includes a cylindrical shell 1 containing a filter element 2. One side of the shell has an inlet pipe 10, and the other side has an outlet pipe 11. Both pipes are connected to connecting flanges 12 at their outer ends. The inlet pipe 10 and outlet pipe 11 are located on the same horizontal axis, which passes through the diameter of the cross-section of the cylindrical shell 1, ensuring a reasonable path for airflow within the shell. The bottom surface of the cylindrical shell 1 also has an inverted trapezoidal slag discharge port 13. A detachable connecting cover 14 is connected to the slag discharge port 13, and the connecting cover 14 is threaded to the slag discharge port 13. Tightening the cover creates a leak-free seal, and the cover can be opened daily to clean settled solid impurities. The top of the cylindrical shell 1 also has a top cover 9. The outer ring of the upper end of the cylindrical shell 1 has a disassembly threaded port 1a, and the top cover 9 is connected to the disassembly threaded port 1a.

[0015] See Figure 1 The cylindrical outer shell 1 has two vertical positioning rods 3 connected inside. The positioning rods 3 are located on both sides of the slag discharge port 13. The filter element 2 has two through positioning holes 21 inside. The positioning holes 21 are slidably connected to the positioning rods 3 to achieve precise positioning of the filter element 2 inside the cylindrical outer shell 1 and prevent the filter element from shifting during operation.

[0016] See Figure 1 and Figure 2 The part of the positioning rod 3 that extends out of the positioning hole 21 is provided with a connecting thread 31. The top of the filter element 2 is provided with a first sealing gasket 41, a first pressure plate 51, a second sealing gasket 42 and a second pressure plate 52 in sequence from bottom to top. Both the sealing gasket 4 and the pressure plate 5 are provided with through holes 6 corresponding to the positioning rod 3. The positioning rod 3 passes through the upper part of the second pressure plate 52 and is connected to the clamping nut 7. Through the cooperation of the connecting thread 31 and the clamping nut 7, the pressure plate 5 and the sealing gasket 4 can be tightly pressed on the top of the filter element 2, which effectively enhances the sealing of the filtration area and prevents unfiltered gas from leaking from the edge of the filter element.

[0017] See Figure 1 , Figure 2 and Figure 3 An isolation cover 8 is provided above the second pressure plate 52. Sliding blocks 81 are provided on both sides of the isolation cover 8. The inner wall of the top of the columnar outer shell 1 is provided with a sliding groove 1b that is fitted into the sliding block 81. The isolation cover 8 is installed above the second pressure plate 52 through the sliding connection between the sliding block 81 and the sliding groove 1b, which can isolate the space above the filter element. The isolation cover 8 is also provided with a fixing hole 82 that matches the positioning rod 3. The top of the fixing hole 82 is provided with a fixing groove 83. The diameter of the fixing groove 83 is larger than that of the fixing hole 82. A locking nut 84 is provided in the fixing groove 83. A sealing ring 85 is fitted at the bottom of the locking nut 84. The part of the positioning rod 3 that passes through the fixing hole 82 is locked with the locking nut 84 by threads. The cooperation between the fixing hole 82 and the positioning rod 3 and the setting of the locking nut 84 can further improve the stability of the installation of the isolation cover 8. When the filter element 2 needs to be replaced, simply unscrew the clamping nut 7 and the locking nut 84 to remove the isolation cover 8, the pressure plate 5, the sealing gasket 4 and the filter element 2 in sequence. The isolation cover 8 is surrounded by an arc-shaped groove 86, and a matching sealing ring 87 is connected inside the arc-shaped groove 86 to further enhance the sealing of the interior of the cylindrical shell.

[0018] During installation, first unscrew the top cover 9 and the isolation cover 8 in sequence, slide the filter element into place from top to bottom along the positioning rod 3, then stack two layers of sealing gaskets 4 and pressure plates 5 in sequence, and tighten the clamping nut 7 to complete the pre-fixing of the filter element.

[0019] Then, insert the isolation cover 8, push it along the sliding groove 1b until it is fully aligned, install the locking nut 84 and tighten it, and finally screw on the top cover 9. Connect the inlet and outlet gas pipes to the industrial gas circuit through the flange and it can be put into use.

[0020] When replacing the filter element, simply unscrew the top cover 9, lock nut 84, pull out the isolation cover 8, and loosen the clamping nut 7 to directly remove the old filter element. No special tools are needed throughout the process.

[0021] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A gas filter element fixing bracket, characterized in that: It includes a cylindrical outer shell (1), with an air inlet pipe (10) and an air outlet pipe (11) on both sides, a slag discharge port (13) at the bottom, and a top cover (9) at the top. The cylindrical outer shell (1) is connected to a set of vertical positioning rods (3), and the filter element (2) is provided with a set of through positioning holes (21). The positioning rods (3) and the positioning holes (21) form a sliding guide fit. The upper end of the positioning rods (3) extends out of the positioning holes (21) and is provided with connecting threads (31). The filter element (2) is provided with a combination structure of sealing gasket (4) and pressure plate (5) on the top. Both sealing gasket (4) and pressure plate (5) are provided with through holes (6). The positioning rod (3) passes through the through hole (6) and is connected to the clamping nut (7) through the connecting thread (31). An isolation cover (8) is provided above the uppermost pressing plate (5). Sliding blocks (81) are provided on both sides of the isolation cover (8). Sliding grooves (1b) that fit into the sliding blocks (81) are provided on both sides of the inner wall of the columnar shell (1). A through fixing hole (82) is provided on the isolation cover (8). A coaxial fixing groove (83) is provided at the top of the fixing hole (82). A locking nut (84) is provided in the fixing groove (83). The positioning rod (3) passes upward through the corresponding fixing hole (82) and is fixedly connected to the locking nut (84).

2. The gas filter element fixing bracket according to claim 1, characterized in that: The air inlet pipe (10) and the air outlet pipe (11) are located on the same horizontal axis, and the axis coincides with the cross-sectional diameter of the columnar shell (1). The outer ends of the air inlet pipe (10) and the air outlet pipe (11) are respectively fixed with connecting flanges (12).

3. The gas filter element holder according to claim 1 or 2, characterized in that: The sealing gasket (4) is provided in two parts, namely the first sealing gasket (41) and the second sealing gasket (42). The pressure plate (5) is also provided in two parts, namely the first pressure plate (51) and the second pressure plate (52). The combined structure of the sealing gasket (4) and the pressure plate (5) from bottom to top is the first sealing gasket (41), the first pressure plate (51), the second sealing gasket (42) and the second pressure plate (52).

4. The gas filter element holder according to claim 1 or 2, characterized in that: The diameter of the fixing groove (83) is larger than the diameter of the fixing hole (82), and the lower surface of the locking nut (84) is provided with a sealing ring (85).

5. The gas filter element holder according to claim 1 or 2, characterized in that: The isolation cover (8) has an arc-shaped groove (86) around its perimeter, and a matching sealing ring (87) is connected inside the arc-shaped groove (86).

6. The gas filter element holder according to claim 1 or 2, characterized in that: The diameters of the pressure plate (5), sealing gasket (4) and isolation cover (8) are all adapted to the inner diameter of the cylindrical shell (1).

7. The gas filter element holder according to claim 1 or 2, characterized in that: The slag discharge port (13) is an inverted trapezoidal structure, which is connected to the middle of the bottom surface of the columnar shell (1). The lower end of the positioning rod (3) is located on both sides of the slag discharge port (13). The lower end of the slag discharge port (13) is connected to the connecting cover (14) by a thread.

8. The gas filter element holder according to claim 1 or 2, characterized in that: The top outer wall of the cylindrical shell (1) is provided with a disassembly threaded port (1a), and the top cover (9) is connected to the disassembly threaded port (1a) by threads.

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