Pipeline filter and natural gas transmission pipeline
By introducing an axial limiting device into the natural gas pipeline, the problem of resetting difficulties caused by axial displacement during the disassembly and reassembly of the pipeline filter is solved, and more efficient maintenance and maintenance is achieved.
Patent Information
- Application Number
- CN202421205653.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In natural gas long-distance pipelines, due to the large axial displacement of the pipeline filter, there is a large axial stress during the disassembly and reassembly, making it difficult to effectively disassemble and reset, which increases the difficulty of maintenance.
A pipe filter is designed, including a filter body, an air inlet connector, an air outlet connector and an axial limiting device, which is connected between the air inlet and the air outlet connector through an axial limiting device to limit the The axial displacement of the intake pipe and the outlet pipe ensures that the filter body does not cause relative displacement due to the stress of the pipe system after disassembly, and simplifies the disassembly and reassembly process.
It reduces the difficulty of maintenance and disassembly of filters, improves maintenance efficiency, is simple in structure, flexible and reliable in operation, is easy to clean and maintain, and reduces maintenance costs.
Smart Images
Figure CN222255458U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of natural gas transportation, and in particular relates to a pipeline filter and a natural gas transmission pipeline. Background Art
[0002] In long-distance natural gas pipelines, pipeline filters are usually installed on the air inlet pipelines of pipeline compressors to filter out debris, particles and other harmful substances in the natural gas medium to ensure the stable operation of the compressor unit. During the unit shutdown and maintenance, the pipeline filter can be disassembled and the filter element can be cleaned of impurities or replaced as a whole. However, due to the large axial displacement of the pipe system itself, a large amount of axial stress is generated, making it difficult to disassemble and reinstall the filter. Utility Model Content
[0003] The utility model aims to solve one of the technical problems existing in the prior art or related technology.
[0004] In the first aspect, the utility model provides a pipe filter, comprising: a filter body, an air inlet connector, an air outlet connector and an axial limit device. The filter body comprises an air inlet and an air outlet. The air inlet connector is arranged on the air inlet pipe. The air inlet of the filter body is connected to the air inlet pipe through the air inlet connector. The air outlet connector is arranged on the air outlet pipe. The air outlet of the filter body is connected to the air outlet pipe through the air outlet connector. The axial limit device is connected between the air inlet connector and the air outlet connector to limit the axial displacement between the air inlet pipe and the air outlet pipe.
[0005] Optionally, the axial limiting device comprises: a pair of support plates, a limiting screw and two pairs of fastening nuts. The pair of support plates are respectively arranged on the air inlet connector and the air outlet connector. The limiting screw is connected between the pair of support plates. The two pairs of fastening nuts are arranged on the limiting screw. Each pair of fastening nuts abuts against two sides of a support plate.
[0006] Optionally, the support plate includes: a vertical plate and a reinforcing plate. The vertical plate is arranged on the air inlet connector / air outlet connector. A through hole is arranged on the vertical plate. The limiting screw is inserted into the through hole. The reinforcing plate is arranged on the side of the vertical plate facing the filter body. The reinforcing plate is connected between the plate surface of the vertical plate and the air inlet connector / air outlet connector. And an angle is formed between the reinforcing plate and the vertical plate.
[0007] Optionally, the pipeline filter includes at least two axial limiting devices.
[0008] Optionally, the air inlet connector includes: a first air inlet flange and a second air inlet flange. The first air inlet flange is arranged on the air inlet of the filter body. The second air inlet flange is arranged on the air inlet pipe. The second air inlet flange is sealed and connected to the first air inlet flange by bolts. One end of the axis limit device is connected to the second air inlet flange.
[0009] Optionally, the air outlet connector includes: a first air outlet flange and a second air outlet flange. The first air outlet flange is arranged on the air outlet of the filter body. The second air outlet flange is arranged on the air outlet pipe. The second air outlet flange is sealed and connected to the first air outlet flange by bolts. The other end of the axis limit device is connected to the second air outlet flange.
[0010] Optionally, the filter body is cylindrical.
[0011] Optionally, the filter body comprises: a housing and a filter element. The air inlet and the air outlet are arranged on the housing. The filter element is detachably arranged in the housing.
[0012] Optionally, a hanging ring is provided on the filter body.
[0013] In a second aspect, the utility model further provides a natural gas pipeline, comprising: a gas pipeline, a compressor and the above-mentioned pipeline filter. The compressor and the pipeline filter are arranged on the gas pipeline. And along the gas flow direction in the gas pipeline, the pipeline filter is located upstream of the compressor.
[0014] Beneficial Effects
[0015] 1. The pipe filter provided by the utility model includes a filter body, an air inlet connector, an air outlet connector and an axial limit device. The air inlet connector and the air outlet connector are respectively arranged on the air inlet pipe and the air outlet pipe. The air inlet of the filter body is connected to the air inlet pipe through the air inlet connector, and the air outlet of the filter body is connected to the air outlet pipe through the air outlet connector. The axial limit device is connected between the air inlet connector and the air outlet connector to limit the axial displacement between the air inlet pipe and the air outlet pipe. When it is necessary to disassemble and overhaul the filter body, the filter body is disassembled from between the air inlet connector and the air outlet connector, and the axial limit device is still connected between the air inlet connector and the air outlet connector to limit the axial displacement between the air inlet pipe and the air outlet pipe, so as to avoid that after the filter body is disassembled, the air inlet pipe and the air outlet pipe produce a large relative displacement under the stress of the pipe system itself, which makes it difficult to reinstall the filter body. The difficulty of overhauling and disassembling the filter is reduced, which is beneficial to improving the overhaul efficiency; the filter has a simple structure, flexible and reliable operation, and is easy to clean and maintain.
[0016] 2. The natural gas pipeline provided by the utility model includes: a gas pipeline, a compressor and the above-mentioned pipeline filter, so it is easy to clean and maintain and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the structure of a pipeline filter according to an embodiment of the present invention;
[0018] Figure 2 The present invention provides a schematic structural diagram of a natural gas pipeline according to an embodiment of the present invention.
[0019] The reference numerals are as follows:
[0020] 1. Filter body; 2. Air inlet connector; 3. Air outlet connector; 4. Axial limit device; 5. Air inlet pipe; 6. Air outlet pipe; 7. Compressor; 8. Air transmission pipe;
[0021] 11. Rings;
[0022] 21. First air inlet flange; 22. Second air inlet flange;
[0023] 31. First outlet flange; 32. Second outlet flange;
[0024] 41. Support plate; 42. Limit screw; 43. Fastening nut;
[0025] 411. Vertical plate; 412. Reinforcement plate. DETAILED DESCRIPTION
[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0030] In a first aspect, this embodiment provides a pipeline filter. Figure 1 A schematic diagram of the structure of a pipeline filter provided in this embodiment.
[0031] like Figure 1 As shown, the pipe filter of this embodiment includes: a filter body 1, an air inlet connector 2, an air outlet connector 3 and an axial limit device 4. The filter body 1 includes an air inlet and an air outlet. The air inlet connector 2 is arranged on the air inlet pipe 5. The air inlet of the filter body 1 is connected to the air inlet pipe 5 through the air inlet connector 2. The air outlet connector 3 is arranged on the air outlet pipe 6. The air outlet of the filter body 1 is connected to the air outlet pipe 6 through the air outlet connector 3. The axial limit device 4 is connected between the air inlet connector 2 and the air outlet connector 3 to limit the axial displacement between the air inlet pipe 5 and the air outlet pipe 6.
[0032] In some examples, such as Figure 1 As shown, the connection between the air inlet connector 2 and the air inlet pipe 5 can be welding or threaded connection. This embodiment does not impose too many restrictions on this, as long as the air inlet connector 2 and the air inlet pipe 5 can be sealed.
[0033] In some examples, such as Figure 1 As shown, the connection between the air outlet connector 3 and the air outlet pipe 6 can be welding or threaded connection. This embodiment does not impose too many restrictions on this, as long as the air outlet connector 3 and the air outlet pipe 6 can be sealed.
[0034] For some examples, see Figure 1 The filter body 1 can be a straight-through type. This arrangement has a simple structure and is easy to install. In other embodiments, the filter body 1 can also be a T-type, a Y-type, a double-switch type, a basket filter, etc., and this embodiment does not impose too many restrictions on this.
[0035] The pipeline filter of this embodiment includes a filter body 1, an air inlet connector 2, an air outlet connector 3 and an axial limit device 4. The air inlet connector 2 and the air outlet connector 3 are respectively arranged on the air inlet pipe 5 and the air outlet pipe 6. The air inlet of the filter body 1 is connected to the air inlet pipe 5 through the air inlet connector 2, and the air outlet of the filter body 1 is connected to the air outlet pipe 6 through the air outlet connector 3. The axial limit device 4 is connected between the air inlet connector 2 and the air outlet connector 3 to limit the axial displacement between the air inlet pipe 5 and the air outlet pipe 6. When the filter body 1 needs to be disassembled for maintenance, the filter body 1 is disassembled from between the air inlet connector 2 and the air outlet connector 3, while the axial limit device 4 is still connected between the air inlet connector 2 and the air outlet connector 3 to limit the axial displacement between the air inlet pipe 5 and the air outlet pipe 6, so as to avoid that after the filter body 1 is disassembled, the air inlet pipe 5 and the air outlet pipe 6 produce a large relative displacement under the stress of the pipe system itself, which makes it difficult to reinstall the filter body 1. The difficulty of maintenance and disassembly of the pipeline filter is reduced, which is conducive to improving the maintenance efficiency, and the structure is simple, the operation is flexible and reliable, and it is easy to clean and maintain.
[0036] In some embodiments, Figure 1 As shown, the axial limiting device 4 includes: a pair of support plates 41, a limiting screw 42 and two pairs of fastening nuts 43. The pair of support plates 41 are respectively arranged on the air inlet connector 2 and the air outlet connector 3. The limiting screw 42 is connected between the pair of support plates 41. Two pairs of fastening nuts 43 are arranged on the limiting screw 42. Each pair of fastening nuts 43 abuts against both sides of a support plate 41.
[0037] In some examples, such as Figure 1 As shown, two pairs of fastening nuts 43 are connected to the limiting screw rods 42 through threaded matching, and each pair of fastening nuts 43 abuts against the left and right sides of a support plate 41. Such a configuration can play a role in fixing the limiting screw rods 42, fix the relative position between the limiting screw rods 42 and the support plate 41, and further limit the relative position between the air inlet pipe 5 and the air outlet pipe 6.
[0038] In some examples, such as Figure 1 As shown, a pair of support plates 41 are welded to the air inlet connector 2 and the air outlet connector 3, respectively. Such an arrangement enables the connection between the support plate 41 and the air inlet connector 2 / air outlet connector 3 to be firm and stable, and the structure is simple. No additional fixing structure is required. However, it is understandable that in other embodiments, the connection between the support plate 31 and the air inlet connector 2 / air outlet connector 3 may also be threaded connection, pin hole connection, etc., and this embodiment does not impose too many restrictions on this.
[0039] The axial limiting device 4 of this embodiment includes a pair of support plates 41, a limiting screw 42 and two pairs of fastening nuts 43. The pair of support plates 41 are respectively arranged on the air inlet connector 2 and the air outlet connector 3. The limiting screw 42 is fixedly connected between the pair of support plates 41 with the cooperation of the two pairs of fastening nuts 43. Therefore, the axial limiting device 4 of this embodiment can fix the relative position of the air inlet connector 2 and the air outlet connector 3, thereby preventing the air inlet pipe 5 and the air outlet pipe 6 from generating axial displacement under the action of the axial stress of the pipeline, which makes it difficult to disassemble and reset the filter body 1. In addition, this embodiment adopts the cooperation of the limiting screw 42 and the two pairs of fastening nuts 43, so that the distance between the air inlet connector 2 and the air outlet connector 3 can be adjusted, and can be applied to filter bodies 1 of various specifications. In addition, since the axial limiting device 4 of this embodiment adopts two pairs of fastening nuts 43 to fix the limiting screw 42, the structure is simple and reliable, and it is easy to assemble and disassemble.
[0040] In some embodiments, Figure 1 As shown, the support plate 41 includes: a vertical plate 411 and a reinforcing plate 412. The vertical plate 411 is arranged on the air inlet connector 2 / air outlet connector 3. A through hole is provided on the vertical plate 411. The limiting screw 42 is inserted into the through hole. The reinforcing plate 412 is arranged on the side of the vertical plate 411 facing the filter body 1. The reinforcing plate 412 is connected between the plate surface of the vertical plate 411 and the air inlet connector 2 / air outlet connector 3. And an angle is formed between the reinforcing plate 412 and the vertical plate 411.
[0041] In some examples, the vertical plate 411 and the reinforcing plate 412 are integrally formed. Such a configuration is conducive to improving the structural stability of the support plate 41 and reducing the number of parts. However, it should be noted that in other embodiments, the vertical plate 411 and the reinforcing plate 412 can also be designed as a split structure and assembled to form the support plate 41 by welding or bolting. This embodiment does not impose too many restrictions on this.
[0042] In addition, it should be noted that the reinforcing plate 412 of this embodiment is disposed on the side of the vertical plate 411 facing the filter body 1 , but in other embodiments, the reinforcing plate 412 may be disposed on both the left and right sides of the vertical plate 411 .
[0043] The support plate 41 of this embodiment includes a vertical plate 411 and a reinforcing plate 412. The vertical plate 411 is used to provide an installation position for the limiting screw 42. The reinforcing plate 412 can provide a supporting force for the vertical plate 411 to prevent the vertical plate 411 from deforming under the pulling force of the limiting screw 42.
[0044] In some embodiments, Figure 1 As shown, the pipeline filter includes at least two axial limiting devices 4.
[0045] In some examples, such as Figure 1 As shown, the pipe filter includes two axial limit devices 4. The two axial limit devices 4 are symmetrically arranged on the upper and lower sides of the filter body 1. Such an arrangement can not only perform axial limitation between the air inlet pipe 5 and the air outlet pipe 6, but also achieve radial limitation. Moreover, it does not interfere with the installation and disassembly of the filter body 1. However, it can be understood that in other embodiments, the pipe filter may also include more than two axial limit devices 4. When there are multiple axial limit devices 4, they can be evenly arranged along the circumference of the filter body 1, or they can be arranged at a specific angle or area. This embodiment does not impose too many restrictions on this.
[0046] The pipeline filter of this embodiment includes at least two axial limit devices 4, which can not only limit the axial position of the air inlet pipe 5 and the air outlet pipe 6, but also achieve radial limit. In addition, the pipeline filter includes at least two axial limit devices 4, which can also be used to resist stress problems in multiple different directions in the pipe system.
[0047] In some embodiments, Figure 1 As shown, the air inlet connector 2 includes: a first air inlet flange 21 and a second air inlet flange 22. The first air inlet flange 21 is arranged on the air inlet of the filter body 1. The second air inlet flange 22 is arranged on the air inlet pipe 5. The second air inlet flange 22 is sealed and connected to the first air inlet flange 21 by bolts. One end of the axis limit device 4 is connected to the second air inlet flange 22.
[0048] In some examples, such as Figure 1 As shown, the second air intake flange 22 is located at the end of the air intake pipe 5 and is an integral structure with the air intake pipe 5. Such a configuration can make the connection between the second air intake flange 22 and the air intake pipe 5 more firm and reliable, avoid stress concentration, and help reduce the number of parts and simplify the structure.
[0049] For some examples, see Figure 1 A sealing structure is provided between the second air inlet flange 22 and the first air inlet flange 21. For example, a sealing gasket or a sealing ring, etc. This arrangement can improve the sealing performance between the second air inlet flange 22 and the first air inlet flange 21.
[0050] In some examples, such as Figure 1 As shown, a support plate 41 of the axis limiting device 4 is arranged on the second air inlet flange 22. In this way, when the filter body 1 is disassembled, the axis limiting device 4 is still connected to the air inlet pipe 5 to limit the air inlet pipe 5.
[0051] The air inlet connector 2 of this embodiment includes a first air inlet flange 21 and a second air inlet flange 22. The first air inlet flange 21 is arranged on the air inlet of the filter body 1. The second air inlet flange 22 is arranged on the air inlet pipe 5. The second air inlet flange 22 is sealed and connected to the first air inlet flange 21 by bolts. When the filter body 1 needs to be disassembled and repaired, it is only necessary to open the bolts between the second air inlet flange 22 and the first air inlet flange 21 to disconnect the connection between the filter body 1 and the air inlet pipe 5, which is simple and convenient to operate.
[0052] In some embodiments, Figure 1 As shown, the air outlet connector 3 includes: a first air outlet flange 31 and a second air outlet flange 32. The first air outlet flange 31 is arranged on the air outlet of the filter body 1. The second air outlet flange 32 is arranged on the air outlet pipe 6. The second air outlet flange 32 is sealed and connected to the first air outlet flange 31 by bolts. The other end of the axis limit device 4 is connected to the second air outlet flange 32.
[0053] In some examples, such as Figure 1 As shown, the second outlet flange 32 is located at the end of the outlet pipe 6 and is an integral structure with the outlet pipe 6. This arrangement can make the connection between the second outlet flange 32 and the outlet pipe 6 more firm and reliable, avoid stress concentration, and help reduce the number of parts and simplify the structure.
[0054] For some examples, see Figure 1 A sealing structure is provided between the second outlet flange 32 and the first outlet flange 31 , such as a sealing gasket or a sealing ring. Such a configuration can improve the sealing performance between the second outlet flange 32 and the first outlet flange 31 .
[0055] In some examples, such as Figure 1 As shown, another support plate 41 of the axis limiting device 4 is arranged on the second outlet flange 32. In this arrangement, when the filter body 1 is disassembled, the axis limiting device 4 is still connected to the outlet pipe 6 to limit the outlet pipe 6.
[0056] The air outlet connector 3 of this embodiment includes a first air outlet flange 31 and a second air outlet flange 32. The first air outlet flange 31 is arranged on the air outlet of the filter body 1. The second air outlet flange 32 is arranged on the air outlet pipe 6. The second air outlet flange 32 is sealed and connected to the first air outlet flange 31 by bolts. When the filter body 1 needs to be disassembled and repaired, it is only necessary to open the bolts between the second air outlet flange 32 and the first air outlet flange 31 to disconnect the connection between the filter body 1 and the air outlet pipe 6, which is simple and convenient to operate.
[0057] In some embodiments, Figure 1 As shown, the filter body 1 is cylindrical.
[0058] The filter body 1 of this embodiment is cylindrical, adapted to the shape and inner diameter of the air inlet pipe 5 and the air outlet pipe 6 , and can ensure that the natural gas in the pipe flows stably and smoothly through the filter body 1 into the compressor 7 .
[0059] In some embodiments, see Figure 1 The filter body 1 comprises: a housing and a filter element. The air inlet and the air outlet are arranged on the housing. The filter element is detachably arranged in the housing.
[0060] For some examples, see Figure 1 The filter element can be a single-layer filter element, a double-layer filter element or a multi-layer filter element. The shape of the filter element can be a sheet, a cylinder or a combination of multiple shapes. This embodiment does not impose too many restrictions on this, as long as the filtering standard can be met.
[0061] The filter body 1 of this embodiment includes a housing and a filter element. When the unit is shut down for maintenance, the filter element can be pulled out of the housing to clean impurities or replace it as a whole.
[0062] In some embodiments, Figure 1 As shown, a hanging ring 11 is provided on the filter body 1 .
[0063] In some examples, such as Figure 1 As shown, the filter body 1 includes two lifting rings 11, which are respectively close to the front and rear ends of the filter body 1. Such an arrangement can make the lifting and transportation of the filter body 1 more stable.
[0064] In this embodiment, a lifting ring 11 is provided on the filter body 1, so that the filter body 1 can be lifted and carried by using a lifting device, thereby reducing the difficulty of disassembling and assembling the filter body.
[0065] In a second aspect, this embodiment also provides a natural gas pipeline. Figure 2 A schematic diagram of the structure of a natural gas pipeline provided in this embodiment.
[0066] like Figure 2 As shown, the natural gas pipeline of this embodiment includes: a gas pipeline 8, a compressor 7 and the above-mentioned pipeline filter. The compressor 7 and the above-mentioned pipeline filter are arranged on the gas pipeline 8. And along the gas flow direction in the gas pipeline 8, the pipeline filter is located upstream of the compressor 7.
[0067] For some examples, see Figure 2 In this embodiment, the natural gas pipeline may include multiple gas pipelines 8, and the multiple gas pipelines 8 form a natural gas transmission network. The compressor 7 and the pipeline filter are set at appropriate positions according to actual needs. A gas pipeline 8 can have multiple pipeline filters to meet the filtering needs.
[0068] The natural gas pipeline of this embodiment includes a gas pipeline 8, a compressor 7 and the above-mentioned pipeline filter, so it is easy to clean and maintain and convenient to use.
[0069] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.
[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.
Claims
1. A pipeline filter, characterized in that: include: A filter body, including an air inlet and an air outlet; An air inlet connector is arranged on the air inlet pipeline; the air inlet of the filter body is connected with the air inlet pipeline through the air inlet connector; An air outlet connector is arranged on the air outlet pipe; the air outlet of the filter body is connected with the air outlet pipe through the air outlet connector; An axial limit device is connected between the air inlet connector and the air outlet connector to limit the axial displacement between the air inlet pipe and the air outlet pipe.
2. The pipeline filter according to claim 1, characterized in that: The axial limiting device comprises: A pair of support plates, respectively disposed on the air inlet connector and the air outlet connector; A limiting screw rod connected between the pair of support plates; Two pairs of fastening nuts are arranged on the limiting screw rods; each pair of the fastening nuts abuts against two sides of one of the supporting plates.
3. The pipeline filter according to claim 2, characterized in that: The support plate comprises: A vertical plate is arranged on the air inlet connector / the air outlet connector; a through hole is arranged on the vertical plate; and the limiting screw is inserted into the through hole; A reinforcing plate is arranged on a side of the vertical plate facing the filter body; the reinforcing plate is connected between the plate surface of the vertical plate and the air inlet connector / the air outlet connector; and an angle is formed between the reinforcing plate and the vertical plate.
4. The pipeline filter according to claim 1, characterized in that: The pipeline filter includes at least two axial limiting devices.
5. The pipeline filter according to claim 1, characterized in that: The air inlet connector comprises: A first air inlet flange is arranged on the air inlet of the filter body; A second air inlet flange is arranged on the air inlet pipeline; the second air inlet flange is sealed and connected to the first air inlet flange by bolts; One end of the axial limiting device is connected to the second air inlet flange.
6. The pipeline filter according to claim 1, characterized in that: The air outlet connector comprises: A first air outlet flange is arranged on the air outlet of the filter body; A second gas outlet flange is arranged on the gas outlet pipe; the second gas outlet flange is sealed and connected to the first gas outlet flange by bolts; The other end of the axial limiting device is connected to the second air outlet flange.
7. The pipeline filter according to claim 1, characterized in that: The filter body is cylindrical.
8. The pipeline filter according to claim 1, characterized in that: The filter body comprises: A shell, wherein the air inlet and the air outlet are arranged on the shell; The filter element is detachably arranged in the housing.
9. The pipeline filter according to claim 1, characterized in that: The filter body is provided with a hanging ring.
10. A natural gas pipeline, characterized in that: include: A gas pipeline, a compressor, and a pipeline filter as claimed in any one of claims 1 to 9; The compressor and the pipeline filter are arranged on the gas pipeline; And along the gas flow direction in the gas transmission pipeline, the pipeline filter is located upstream of the compressor.