Combined gas filter

Abstract

The utility model relates to a combined gas filter, which relates to the technical field of filter equipment and comprises a gas inlet pipeline, a gas outlet pipeline and a filter component fixing component. The filtering assembly comprises a filtering cylinder, a filtering pipeline, a first connecting frame and a second connecting frame, the filtering pipeline is arranged between the air inlet pipeline and the air outlet pipeline, the air inlet pipeline, the filtering pipeline and the air outlet pipeline are communicated with one another, and the first connecting frame and the second connecting frame are provided with first external threads and second external threads; a first internal thread is arranged at the end, close to the filtering pipeline, of the air inlet pipeline, and a second internal thread is arranged at the end, away from the air inlet pipeline, of the filtering pipeline. According to the device, the filter cartridge can be rotationally fixed in the filter pipeline through mutual matching of threads, the stability and the sealing performance are improved, meanwhile, the connecting rod arranged on the filter cartridge is convenient to rotate and pull out, the convenience of cleaning, replacing and overhauling the filter assembly is improved, and then the practicability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a combined fuel gas filter. Background Art

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It is mainly found in oil fields and natural gas fields, and a small amount is also found in coal seams. Most existing natural gas contains gas, liquid and solid impurities. Liquid impurities include water and oil, and solid impurities include mud, rock particles and ferrous sulfide. If the impurities in natural gas are not handled in time, it is easy to cause pipeline blockage and affect the combustion effect. Therefore, after the natural gas is mined, it needs to be filtered using a filtering device, and the filtered natural gas is then delivered to users for use.

[0003] At present, the Chinese utility model patent application with the publication date of April 11, 2023 and the publication number of CN218833813U proposes a Y-type filter, including: a filter body, a filter cartridge is connected to the filter body, and an annular abutment platform is arranged in the filter cartridge; an end cover, the end cover is detachably connected to the port of the filter cartridge; a filter assembly, the filter assembly is arranged in the filter cartridge, and a through hole is opened on the filter assembly; and a limit assembly, the limit assembly includes a fixing nut and a limiting member, the fixing nut is fixed to the outer wall of the filter assembly, and the threaded hole of the fixing nut is coaxial with the through hole, the limiting member is a bolt or a stud, the limiting member passes through the through hole and is threadedly connected to the fixing nut, and the end of the limiting member extends from the fixing nut and overlaps the abutment platform. Through the above technical solution, it is convenient to disassemble and assemble the internal filtering structure.

[0004] However, the filter assembly is also limited by components such as bolts and nuts. When replacing, cleaning and repairing the filter element, the end cover and the filter assembly need to be disassembled and assembled twice, which affects the efficiency of cleaning the filter element and is not convenient enough. Utility Model Content

[0005] In order to increase the convenience of disassembling and assembling a filter assembly, the utility model provides a combined gas filter.

[0006] The utility model provides a combined gas filter, which comprises an air inlet pipe, an air outlet pipe filter assembly and a fixing assembly. The filter assembly comprises a filter cartridge and a filter pipe, a first connecting frame and a second connecting frame, the filter pipe is arranged between the air inlet pipe and the air outlet pipe, and the air inlet pipe, the filter pipe and the air outlet pipe are interconnected, the first connecting frame is arranged on one end of the filter cartridge, the second connecting frame is arranged on the other end of the filter cartridge, the first connecting frame is provided with a first external thread, the second connecting frame is provided with a second external thread, the end of the air inlet pipe close to the filter pipe is provided with a first internal thread, the end of the filter pipe away from the air inlet pipe is provided with a second internal thread, the first connecting frame is threadedly connected to the air inlet pipe, and the fixing assembly is used to fix the filter cartridge on the filter pipe.

[0007] By adopting the above technical solution, when the filter assembly needs to be disassembled for cleaning and replacement, after opening the fixing assembly at the port of the filter pipe, the external thread on the connecting frame cooperates with the internal thread of the filter pipe and the air intake pipe to be tightly connected. By rotating the filter cartridge, it is rotated out of the filter pipe and cleaned, replaced or repaired and inspected, which improves the convenience of using this product and facilitates disassembly and maintenance. At the same time, the mutual cooperation of the threads increases the sealing of the filter cartridge frame and the air intake pipe, separates the unfiltered gas from the filtered gas, and improves the filtering efficiency.

[0008] Optionally, the diameter of the first connecting frame is smaller than the diameter of the second connecting frame.

[0009] By adopting the above technical solution, during disassembly, assembly, maintenance and inspection, since the diameter of the first connecting frame is smaller than the diameter of the second connecting frame, the smaller diameter of the first connecting frame is convenient for entering the filter pipe, reducing the possibility of scratches and wear of the internal threads in the filter pipe, and the structure with a narrow top and a wide bottom is more convenient for the entry and exit of the filter cartridge.

[0010] Optionally, the filter assembly further includes a first sealing gasket and a second sealing gasket, wherein the first sealing gasket is arranged at the upper end of the first external thread, and the second sealing gasket is arranged at the lower end of the second external thread.

[0011] By adopting the above technical solution, when the filter cartridge is rotated and tightened in the filter pipe, the first sealing gasket and the second sealing gasket fill the gap between the threads, separate the unfiltered gas from the filtered gas, prevent gas leakage, reduce friction and wear between the threads, and well protect the sealing of the filter structure.

[0012] Optionally, the fixing assembly includes a first flange, a second flange and a third sealing gasket, the first flange is arranged on an end of the filter pipe away from the recent pipe, the second flange is connected to the first flange, one side of the third sealing gasket abuts against the first flange, and the other side of the third sealing gasket abuts against the second flange.

[0013] By adopting the above technical solution, when the filter cartridge is closed after maintenance, the first flange, the second flange, and the third sealing gasket are tightly connected, and the cooperation between the fixed components increases the sealing performance of the filter, effectively ensures the sealing effect at the filter pipe port, avoids natural gas leakage, and increases the safety of workers when using the product.

[0014] Optionally, an annular gasket is provided at one end of the second connecting frame away from the filter cartridge, one side of the annular gasket abuts against the first flange, and the other side of the annular gasket abuts against the third sealing gasket.

[0015] By adopting the above technical solution, the extended annular gasket is connected to the first flange, and the filter cartridge together with the first flange and the second flange can be fixed together at a section of the filter pipe away from the air intake pipe. It is convenient to fix the filter cartridge on the filter pipe, which improves the stability of the filter cartridge. At the same time, the extended annular gasket can reduce the gap between the filter pipe and the filter cartridge, and improve the sealing of the gas filter. At the same time, the annular gasket facilitates the disassembly and installation of the filter cartridge parts, saving labor costs.

[0016] Optionally, a first connecting rod is arranged on the inner circumference of the first connecting frame, a second connecting rod is arranged on the inner circumference of the second connecting frame, a third connecting rod is arranged in the filter cartridge, one end of the third connecting rod is connected to the first connecting rod, and the other end of the third connecting rod is connected to the second connecting rod, and the first connecting rod and the second connecting rod are both cross-shaped structures.

[0017] By adopting the above technical solution, when disassembling the filter assembly, the first connecting rod and the second connecting rod are tightly connected by the third connecting rod, and the filter assembly can be rotated and disassembled by holding the second connecting rod and rotating it out. The design of the second connecting rod is convenient for the user to hold it tightly, and the structure is simple and easy to operate, so that the filter assembly can be easily pulled out of the filter pipe. At the same time, the first connecting rod and the second connecting rod of the cross structure also improve the stability of the filter cartridge, effectively preventing the deformation of the filter cartridge assembly during use.

[0018] Optionally, the air inlet pipe port is provided with a third flange, and the air outlet pipe port is provided with a fourth flange.

[0019] By adopting the above technical solution, the flanges of the air inlet pipe and the air outlet pipe adopt the principle of face sealing, which can effectively ensure that there is no air leakage at the connection between the air inlet and outlet. The flange structure is simple and easy to operate. It can also serve as a supporting component to improve the stability of the filter body, which helps to protect the normal operation of the equipment and pipelines.

[0020] In summary, the present invention includes at least one of the following beneficial technical effects:

[0021] 1. Through the cooperation between the external thread on the connecting frame and the internal thread on the inner wall of the pipe, the filter cartridge can be disassembled and assembled by rotating the connection. This solves the inconvenience of removing the mounting bolts, nuts and other limit components when disassembling and replacing the filter cartridge. By rotating the filter cartridge, it can be rotated out of the filter pipe, which improves the convenience of using this product and facilitates disassembly and maintenance. Fixing the filter cartridge on the filter pipe improves the stability of the filter cartridge and the sealing of the filter. At the same time, the mutual cooperation of the threads increases the sealing of the filter cartridge frame and the air intake pipe, separates the unfiltered gas from the filtered gas, and improves the filtration efficiency.

[0022] 2. The structure of the connecting frame, which is narrow at the top and wide at the bottom, makes it easier for the filter cartridge to enter and exit, reducing the possibility of scratches and wear on the internal threads in the filter pipe.

[0023] 3. Through the close connection between the first flange, the second flange, and the third gasket, the cooperation between the fixed components increases the sealing of the filter, effectively ensures the sealing effect at the port of the filter pipe, avoids natural gas leakage, and increases the safety of the staff when using the product. The flange adopts the principle of face sealing, which can effectively ensure that there is no leakage at the connection between the inlet and outlet. The flange structure is simple and easy to operate. It can also serve as a supporting component to improve the stability of the filter body, which helps to protect the normal operation of the equipment and pipeline.

[0024] 4. The cross-shaped structure of the first connecting rod and the second connecting rod also improves the stability of the filter cartridge, effectively reducing the possibility of deformation of the filter cartridge as the use time increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0026] Figure 1 Schematic diagram of the overall three-dimensional structure of this embodiment;

[0027] Figure 2 for Figure 1 Sectional view at AA;

[0028] Figure 3 for Figure 2 The enlarged schematic diagram of the middle B part;

[0029] Figure 4 for Figure 2 Enlarged schematic diagram of middle C part;

[0030] Figure 5 is a bottom view of the filter assembly of this embodiment;

[0031] Explanation of the reference numerals: 100, air inlet pipe; 110, third flange; 200, air outlet pipe; 210, fourth flange; 300, filter assembly; 310, filter pipe; 311, first internal thread; 312, second internal thread; 320, first connecting frame; 321, first external thread; 330, second connecting frame; 331, second external thread; 332, annular gasket; 340, filter cartridge; 350, first sealing gasket; 360, second sealing gasket; 400, fixing assembly; 410, first flange; 420, second flange; 430, third sealing gasket; 500, first connecting rod; 510, second connecting rod; 520, third connecting rod. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] The following combination Figure 1-Figure 5 The utility model is described in further detail.

[0036] This embodiment discloses a combined gas filter, referring to Figure 1-Figure 5 A combined gas filter includes an air inlet pipe 100, an air outlet pipe 200, a filter assembly 300 and a fixing assembly 400, wherein the filter assembly 300 is used to filter the passing gas, and the fixing assembly 400 is used to fix the filter assembly 300.

[0037] Reference Figure 1-Figure 3 The filter assembly 300 includes a filter cartridge 340, a filter pipe 310, a first connecting frame 320 and a second connecting frame 330. The filter pipe 310 is arranged between the air inlet pipe 100 and the air outlet pipe 200, and the air inlet pipe 100, the filter pipe 310 and the air outlet pipe 200 are connected to each other. The first connecting frame 320 is arranged on one end of the filter cartridge 340, and the second connecting frame 330 is arranged on the other end of the filter cartridge 340. The first connecting frame 320 is provided with a first external thread 321, and the second connecting frame 330 is provided with a second external thread 331. The end of the air inlet pipe 100 close to the filter pipe 310 is provided with a first internal thread 311, and the end of the filter pipe 310 away from the air inlet pipe 100 is provided with a second internal thread 312. The first connecting frame 320 is threadedly connected to the air inlet pipe 100, and the second connecting frame 330 is threadedly connected to the filter pipe 310, so as to rotatably fix the filter cartridge 340 in the filter pipe 310. The fixing assembly 400 includes a first flange 410, a second flange 420 and a third sealing gasket 430, and the first flange 410 and the second flange 420 respectively fasten the annular gasket 332 and the third sealing gasket 430 to the lower end of the filter pipe 310. The diameter of the first connecting frame 320 is smaller than the diameter of the second connecting frame 330. The filter assembly 300 also includes a first sealing gasket 350 and a second sealing gasket 360. The first sealing gasket 350 is arranged at the upper end of the first external thread 321, and the second sealing gasket 360 is arranged at the lower end of the second external thread 331. The lower end of the second connecting frame 330 on the filter cartridge 340 is provided with an annular gasket 332, and the annular gasket 332 is fastened to the fixing assembly 400 at the outer port of the filter pipe 310.

[0038] When the filter starts working, unfiltered gas enters from the air inlet pipe 100, and the gas flows into the filter cartridge 340 in the filter pipe 310 along the pipeline. The gas with liquid and solid particles flows out after passing through the filter cartridge 340, and the impurities will be filtered out inside the filter cartridge 340. The filtered gas enters the outlet pipe 200 through the filter cartridge 340 and then flows out. This structure facilitates the circulation of gas and improves the filtering effect. When the filter is regularly repaired and cleaned, when the filter cartridge 340 needs to be taken out of the filter pipe 310, since the diameter of the first connecting frame 320 is smaller than the diameter of the second connecting frame 330, the narrow upper and wide lower structure makes it easier to take out and install the filter cartridge 340. The first sealing gasket 350 and the second sealing gasket 360 are fixed in the filter pipe 310 as the threads are deeply matched, which improves the sealing of the filter pipe 310, thereby improving the filtering efficiency and safety of the filter. By rotating and unscrewing the entire filter cartridge 340, the first external thread 321 and the second external thread 331 on the first connecting frame 320 are rotated and matched with the first internal thread 311 and the second internal thread 312 on the filter pipe 310 to be taken out. The setting of the thread improves the convenience of the product, while enhancing the stability of the filter screen, and can also separate the unfiltered gas from the filtered gas to improve the filtering effect. After cleaning and maintenance, the filter cartridge 340 is screwed into the filter pipe 310 by rotation, and the annular gasket 332 on the filter cartridge 340 is aligned with the first flange 410, and the third sealing gasket 430 and the second flange 420 are placed in turn. Finally, the filter cartridge 340 is fixed and sealed in the filter pipe 310 by the fastening connection between the first flange 410 and the second flange 420. The sealing performance of the product is improved, the probability of gas leakage is reduced, and the safety of the staff when using the product is increased.

[0039] Reference Figure 1-Figure 5 A first connecting rod 500 is disposed on the inner circumference of the first connecting frame 320, a second connecting rod 510 is disposed on the inner circumference of the second connecting frame 330, a third connecting rod 520 is disposed in the filter cartridge 340, one end of the third connecting rod 520 is connected to the first connecting rod 500, and the other end of the third connecting rod 520 is connected to the second connecting rod 510, and the first connecting rod 500 and the second connecting rod 510 are both cross-shaped structures. A third flange 110 is disposed at the port of the inlet pipe 100, and a fourth flange 210 is disposed at the port of the outlet pipe 200.

[0040] When repairing and cleaning the filter and taking out the filter cartridge 340, the first connecting rod 500, the second connecting rod 510 and the third connecting rod 520 are fixedly connected. The filter cartridge 340 can be rotated and pulled out by holding the second connecting rod 510 with a cross-shaped structure. When installing, the filter cartridge 340 can also be rotated and installed as a whole by the second connecting rod 510. At the same time, the cross-shaped structure of the second connecting rod 510 is added to improve the anti-slip property, increase the convenience and practicality of the product, and at the same time, the first connecting rod 500 and the second connecting rod 510 are fixedly connected to the first connecting frame 320 and the second connecting frame 330 by the third connecting rod 520. When the filter working filter cartridge 340 is used for a long time and is washed by the gas containing impurities, it is also beneficial for the filter cartridge 340 to prevent deformation. The third flange 110 and the fourth flange 210 of the air inlet pipe 100 and the air outlet pipe 200 adopt the principle of surface sealing, which can effectively ensure that there is no air leakage at the connection between the air inlet and outlet. The flange structure is simple and easy to operate. It can also serve as a supporting component to improve the stability of the filter body, which helps to protect the normal operation of the equipment and pipelines.

[0041] The implementation principle of a combined gas filter in this embodiment is:

[0042] Before using the gas filter, the third flange 110 at the air inlet pipe 100 is connected to the pipeline of unfiltered gas, and the fourth flange 210 at the air outlet pipe 200 is connected to the pipeline of filtered gas. When the filter is working, unfiltered gas enters from the air inlet pipe 100, and the gas flows into the filter cartridge 340 in the filter pipe 310 along the pipeline. The gas with liquid and solid particles flows out of the filter pipe 310 after passing through the filter cartridge 340, and the impurities will be blocked by the filter net inside the filter cartridge 340. After using for a period of time, the filter assembly 300 needs to be regularly inspected and maintained. First, the second flange 420, the third sealing gasket 430 and the first flange 410 are removed in turn, and the first connecting rod 500, the second connecting rod 510 and the third connecting rod 520 inside the filter cartridge 340 are fixedly connected. The second connecting rod 510 inside the filter cartridge 340 is rotated, and the external thread of the filter cartridge 340 frame and the internal thread on the filter pipe 310 are rotated and matched with each other, so that the filter cartridge 340 is separated from the filter pipe 310. Since the diameter of the first connecting frame 320 is smaller than that of the second connecting frame 330 , the structure of being narrow at the top and wide at the bottom makes it easier to remove and install the filter cartridge 340 .

[0043] After removal, the filter cartridge 340 made of stainless steel can be cleaned or repaired. After cleaning and repair, the filter cartridge 340 is screwed into the filter pipe 310 again by rotating the second connecting rod 510, and the annular gasket 332 on the filter cartridge 340 is aligned with the first flange 410, and the third sealing gasket 430 and the second flange 420 are placed in sequence. Finally, the filter cartridge 340 is fixed and sealed in the filter pipe 310 by fastening the first flange 410 and the second flange 420. At the same time, the third flange 110 and the fourth flange 210 of the air inlet pipe 100 and the air outlet pipe 200 adopt the principle of surface sealing, which can effectively ensure that there is no air leakage at the connection between the air inlet and outlet. The flange structure is simple and easy to operate, and can also serve as a supporting component to improve the stability of the filter body, which helps to protect the normal operation of the equipment and pipeline.

[0044] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A combined gas filter, characterized in that: The invention comprises an air intake pipe (100), an air outlet pipe (200), a filter assembly (300) and a fixing assembly (400); the filter assembly (300) comprises a filter cartridge (340), a filter pipe (310), a first connecting frame (320) and a second connecting frame (330); the filter pipe (310) is arranged between the air intake pipe (100) and the air outlet pipe (200); the air intake pipe (100), the filter pipe (310) and the air outlet pipe (200) are interconnected; the first connecting frame (320) is arranged on one end of the filter cartridge (340), and the second connecting frame (330) is arranged on the other end of the filter cartridge (340). The first connecting frame (320) is provided with a first external thread (321), the second connecting frame (330) is provided with a second external thread (331), the end of the air intake pipe (100) close to the filter pipe (310) is provided with a first internal thread (311), and the end of the filter pipe (310) away from the air intake pipe (100) is provided with a second internal thread (312), the first connecting frame (320) is threadedly connected to the air intake pipe (100), the second connecting frame (330) is threadedly connected to the filter pipe (310), and the fixing assembly (400) is used to fix the filter cartridge (340) to the filter pipe (310).

2. A combined gas filter according to claim 1, characterized in that: The diameter of the first connecting frame (320) is smaller than the diameter of the second connecting frame (330).

3. A combined gas filter according to claim 1, characterized in that: The filter assembly (300) further comprises a first sealing gasket (350) and a second sealing gasket (360), wherein the first sealing gasket (350) is arranged at the upper end of the first external thread (321), and the second sealing gasket (360) is arranged at the lower end of the second external thread (331).

4. A combined gas filter according to any one of claims 1 to 3, characterized in that: The fixing assembly (400) comprises a first flange (410), a second flange (420) and a third sealing gasket (430), wherein the first flange (410) is arranged on an end of the filter pipe (310) away from the air intake pipe (100), the second flange (420) is connected to the first flange (410), one side of the third sealing gasket (430) is close to the first flange (410), and the other side of the third sealing gasket (430) is in contact with the second flange (420).

5. A combined gas filter according to claim 4, characterized in that: An annular gasket (332) is provided at one end of the second connecting frame (330) away from the filter cartridge (340), one surface of the annular gasket (332) abuts against the first flange (410), and the other surface of the annular gasket (332) abuts against the third sealing gasket (430).

6. A combined gas filter according to claim 1, characterized in that: A first connecting rod (500) is arranged on the inner circumference of the first connecting frame (320), a second connecting rod (510) is arranged on the inner circumference of the second connecting frame (330), and a third connecting rod (520) is arranged in the filter cartridge (340), one end of the third connecting rod (520) is connected to the first connecting rod (500), and the other end of the third connecting rod (520) is connected to the second connecting rod (510), and the first connecting rod (500) and the second connecting rod (510) are both cross-shaped structures.

7. A combined gas filter according to claim 1, characterized in that: The port of the air inlet pipe (100) is provided with a third flange (110), and the port of the air outlet pipe (200) is provided with a fourth flange (210).

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