Fuel gas pipeline filtering device

Abstract

A gas pipeline filtering device comprises a piston cylinder, a gas inlet is formed in one side of the piston cylinder, a gas outlet is formed in the other side of the piston cylinder, a piston is installed in the piston cylinder in an airtight sliding mode, two sets of ventilation grooves corresponding to the gas inlet are formed in the piston, the ventilation grooves can be communicated with the gas inlet respectively, and when the ventilation grooves are communicated with the gas inlet, the ventilation grooves are also communicated with the gas outlet. And the upper side and the lower side of the air inlet are each provided with a slag discharging groove formed in the piston cylinder, and the ventilation grooves can communicate with the corresponding slag discharging grooves correspondingly. The gas filter is simple in structure and ingenious in conception, and through the two sets of ventilation grooves and the filter screens, when filtered-out objects of one set of ventilation grooves and filter screens are cleaned, gas normally passes through the other set of ventilation grooves and filter screens, so that the filtered-out objects of the gas can be cleaned without cutting off gas, actual requirements can be met, and the gas filter is suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the field of gas filtering devices, in particular to a gas pipeline filtering device. Background Art

[0002] A gas pipeline refers to a pipeline facility used to transport combustible gases (such as natural gas, artificial coal gas, etc.). Impurities will exist in the gas during the gas transportation process, so a filter needs to be installed to filter the gas in the natural gas pipeline. However, when the existing gas filtering device needs to clean the impurities in the gas filter, the gas needs to be cut off, which affects the normal use of the user end. Moreover, if the user leaves the kitchen while using natural gas to boil water, the user is unaware of the gas being cut off, resulting in the user not closing the gas valve at the user end. After the natural gas is normally introduced, it will cause gas leakage at the user end. Therefore, we have designed a gas pipeline filtering device that can clean the filter without cutting off the gas. Utility Model Content

[0003] The utility model provides a gas pipeline filtering device to solve the defects in the prior art.

[0004] The utility model is achieved through the following technical solutions:

[0005] A gas pipeline filtering device includes a piston cylinder, an air inlet is provided on one side of the piston cylinder, and an air outlet is provided on the other side. A piston is airtightly and slidably installed in the piston cylinder, and two groups of air permeable grooves are provided on the piston corresponding to the air inlet. The air permeable grooves can be respectively connected to the air inlet. When the air permeable grooves are connected to the air inlet, they are also connected to the air outlet. Filters are fixed in the air permeable grooves, and slag discharge grooves are respectively provided on the upper and lower sides of the air inlet on the piston cylinder. The air permeable grooves can be respectively connected to the corresponding slag discharge grooves. A threaded hole is provided at one end of the piston cylinder, and the thread in the threaded hole is used to cooperate with the installation of a screw, and the screw is rotatably connected to the piston.

[0006] In the gas pipeline filtering device as described above, an air inlet groove is provided on the piston cylinder corresponding to the slag discharge groove, and when the air permeable groove is connected to the slag discharge groove, it is also connected to the corresponding air inlet groove.

[0007] In the gas pipeline filtering device as described above, annular grooves are respectively provided on the upper, middle and lower parts of the outer periphery of the piston cylinder, and coaxial annular airbags are respectively provided in the annular grooves. The outer periphery of the annular airbags is in airtight sliding contact with the inner periphery of the piston cylinder.

[0008] As described above, a gas pipeline filtering device is provided with a through groove at one end of the piston cylinder, a piston tube is movably provided in the through groove, the piston tube is fixedly installed on the piston, a piston plate is airtightly slidably installed in the piston tube, a threaded through hole is provided at the upper end of the piston tube, a thin screw is installed in the threaded through hole, the lower end of the thin screw is rotatably connected to the piston plate through a bearing, and the piston tubes are respectively connected to the annular airbags.

[0009] In the gas pipeline filtering device as described above, an air passage is provided in the piston, the air passage is communicated with the interior of the piston tube, and the air passage is communicated with the annular airbag via a connecting pipe.

[0010] In the gas pipeline filtering device as described above, the outer peripheral thread of the screw rod is matched with a nut, and the nut is fixed on the piston cylinder.

[0011] In the gas pipeline filtering device as described above, an air inlet pipe connected to the air inlet is fixedly provided on the piston cylinder, and an air outlet pipe connected to the air outlet is fixedly provided on the piston cylinder.

[0012] The utility model has the advantages of being simple in structure and ingenious in concept, and having two sets of air vents and filter screens, when one set of air vents and filter screens is being cleaned of filtered material, gas can pass through the other set of air vents and filter screens normally, thereby completing the cleaning of the gas filtered material without cutting off the gas, meeting practical needs and being suitable for promotion. When using the utility model, the piston cylinder is connected to the gas pipeline, the air inlet and the air outlet are respectively connected to the gas pipeline, and then the screw is turned, and the screw drives the piston to move up and down in the piston cylinder until one set of air vents is connected to the air inlet and the air outlet, the gas enters the air vents through the air inlet, is filtered by the filter screen, and is discharged through the air outlet, while the other set of air vents is connected to the slag discharge groove, so that the air vents of the group can be cleaned of filtered material; because the air vents of the upper and lower sets are not connected to the air inlet and the air outlet at the same time, when the piston moves up and down, the slag discharge groove will not be connected to the air inlet, so there will be no gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 It is a structural diagram of the utility model; Figure 2 yes Figure 1 Right view; Figure 3 yes Figure 1 Partial enlarged view of Ⅰ; Figure 4This is a usage state diagram of the utility model.

[0015] 1. Piston cylinder, 2. Air inlet, 3. Air outlet, 4. Piston, 5. Breathing groove, 6. Filter, 7. Slag discharge groove, 8. Threaded hole, 9. Screw, 20. Air inlet groove, 30. Annular groove, 31. Annular airbag, 40. Through groove, 41. Piston tube, 42. Piston plate, 43. Thin screw, 45. Threaded through hole, 50. Air duct, 51. Connecting pipe, 60. Nut, 71. Inlet pipe, 72. Outlet pipe. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0017] A gas pipeline filtering device, such as Figure 1 、 2, 3, and 4, comprising a piston cylinder 1, both ends of the piston cylinder 1 are closed, the piston cylinder 1 is cylindrical, an air inlet 2 is provided on one side of the piston cylinder 1, and an air outlet 3 is provided on the other side, the air inlet 2 and the air outlet 3 are coaxially arranged, a piston 4 is airtightly slidably installed in the piston cylinder 1, two sets of air vents 5 are provided on the piston 4 corresponding to the air inlet 2, the air vents 5 can be respectively connected to the air inlet 2, and when the air vents 5 are connected to the air inlet 2, they are also connected to the air outlet 3, and a filter screen 6 is fixed in the air vent 5, which will The groove 5 is divided into two parts, left and right, and can filter the gas passing through the breathable groove 5. The upper and lower sides of the air inlet 2 are respectively provided with a slag discharge groove 7 opened on the piston cylinder 1. The breathable groove 5 can be connected to the corresponding slag discharge groove 7 respectively. A threaded hole 8 is opened at one end of the piston cylinder 1. The internal thread of the threaded hole 8 is matched with the installation screw 9. The screw 9 is rotatably connected to the piston 4. The lower end of the screw 9 is rotatably connected to the top side of the piston 4 through a bearing. The screw 9 and the piston 4 are not coaxial, so when the screw 9 is rotated, the piston 4 will not rotate with the screw 9. The utility model has a simple structure and an ingenious design. Through two groups of breathable grooves 5 and filter screens 6, when one group of breathable grooves 5 and filter screens 6 is used to clean the filtered matter, the gas can pass through the other group of breathable grooves 5 and filter screens 6 normally, so there is no need to cut off the gas to complete the cleaning of the gas filtered matter, which can meet actual needs and is suitable for promotion. When using the utility model, the piston cylinder 1 is connected to the gas pipeline, the air inlet 2 and the air outlet 3 are respectively connected to the gas pipeline, and then the screw 9 is turned, and the screw 9 drives the piston 4 to move up and down in the piston cylinder 1 until a group of air vent grooves 5 are connected to the air inlet 2 and the air outlet 3. The gas enters the air vent grooves 5 through the air inlet 2 and is filtered by the filter screen 6 and then discharged through the air outlet 3. At the same time, the air vent grooves 5 of another group are connected to the slag discharge groove 7, so that the air vent grooves 5 of this group can be cleaned and filtered. Since the air vent grooves 5 of the upper and lower groups are not connected to the air inlet 2 and the air outlet 3 at the same time, when the piston 4 moves up and down, the slag discharge groove 7 will not be connected to the air inlet 2, so there will be no air leakage.

[0018] Specifically, as shown in the figure, the piston cylinder 1 of this embodiment has an air inlet slot 20 corresponding to the slag discharge slot 7. When the ventilation slot 5 is connected to the slag discharge slot 7, it is also connected to the corresponding air inlet slot 20. When the filtered material in the ventilation slot 5 is discharged through the slag discharge slot 7, high-pressure gas can also be blown into the ventilation slot 5 through the air inlet slot 20 to clean the filter screen 6 with the high-pressure gas, and the cleaned filtered material is discharged through the slag discharge slot 7.

[0019] Specifically, as shown in the figure, annular grooves 30 are formed at the upper, middle, and lower portions of the outer periphery of the piston cylinder 1 in this embodiment. Coaxial annular airbags 31 are disposed within the annular grooves 30. The outer peripheries of the annular airbags 31 form an airtight sliding engagement with the inner periphery of the piston cylinder 1. The annular airbags 31 enhance the sealing between the piston 4 and the piston cylinder 1.

[0020] Furthermore, as shown in the figure, a through groove 40 is provided at one end of the piston cylinder 1 described in this embodiment, and a piston tube 41 is movably provided in the through groove 40. The piston tube 41 is fixedly installed on the piston 4, and a piston plate 42 is airtightly slidably installed in the piston tube 41. A threaded through hole 45 is provided at the upper end of the piston tube 41, and a fine screw 43 is installed in the threaded through hole 45. The lower end of the fine screw 43 is rotatably connected to the piston plate 42 through a bearing. The piston plate 42 and the fine screw 43 are not coaxial. Therefore, when the fine screw 43 rotates, it will not drive the piston plate 42 to rotate. The piston tube 41 is respectively connected to the annular airbag 31. By turning the fine screw 43, the piston plate 42 is driven to move upward or downward along the piston tube 41. When the piston plate 42 moves downward, the gas in the piston tube 41 is pressed into the annular airbag 31, and the annular airbag 31 expands, thereby increasing the sealing between the piston 4 and the piston cylinder 1; when the piston 4 needs to move up and down in the piston cylinder 1, the fine screw 43 can be rotated in the opposite direction to make the piston plate 42 move upward along the piston tube 41, and the gas in the annular airbag 31 is drawn into the piston tube 41, thereby reducing the friction between the annular airbag 31 and the piston cylinder 1, and facilitating the movement and adjustment of the piston 4 in the piston cylinder 1.

[0021] Furthermore, as shown in the figure, the piston 4 of this embodiment has an air passage 50 therein, the air passage 50 being connected to the interior of the piston tube 41, and the air passage 50 being connected to the annular airbag 31 via a connecting tube 51. The piston tube 41 and the annular airbag 31 are connected via the air passage 50 and the connecting tube 51.

[0022] Furthermore, as shown in the figure, the outer peripheral thread of the screw rod 9 in this embodiment is provided with a nut 60, and the nut 60 is fixed on the piston cylinder 1. The nut 60 can increase the stability of the threaded connection between the screw rod 9 and the piston cylinder 1.

[0023] Furthermore, as shown in the figure, an air inlet pipe 71 connected to the air inlet 2 is fixedly provided on the piston cylinder 1 in this embodiment, and an air outlet pipe 72 connected to the air outlet 3 is fixedly provided on the piston cylinder 1. The air inlet pipe 71 facilitates the connection between the gas pipeline and the air inlet 2, and the air outlet pipe 72 facilitates the connection between the gas pipeline and the air outlet 3.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gas pipeline filtering device, comprising a piston cylinder (1), wherein an air inlet (2) is provided on one side of the piston cylinder (1) and an air outlet (3) is provided on the other side thereof, wherein: A piston (4) is airtightly slidably mounted in the piston cylinder (1). Two groups of air-permeable grooves (5) are provided on the piston (4) corresponding to the air inlet (2). The air-permeable grooves (5) can be respectively connected to the air inlet (2). When the air-permeable grooves (5) are connected to the air inlet (2), they are also connected to the air outlet (3). Filters (6) are fixedly provided in the air-permeable grooves (5). Slag discharge grooves (7) provided on the piston cylinder (1) are provided on the upper and lower sides of the air inlet (2). The air-permeable grooves (5) can be respectively connected to the corresponding slag discharge grooves (7). A threaded hole (8) is provided at one end of the piston cylinder (1). The internal thread of the threaded hole (8) is matched with a screw rod (9) for mounting. The screw rod (9) is rotatably connected to the piston (4).

2. A gas pipeline filtering device according to claim 1, characterized in that: An air inlet groove (20) is provided on the piston cylinder (1) corresponding to the slag discharge groove (7); when the air permeable groove (5) is connected to the slag discharge groove (7), it is also connected to the corresponding air inlet groove (20).

3. A gas pipeline filtering device according to claim 1, characterized in that: Annular grooves (30) are respectively provided at the upper, middle and lower parts of the outer periphery of the piston cylinder (1), and coaxial annular air bags (31) are respectively provided in the annular grooves (30). The outer periphery of the annular air bag (31) is in airtight sliding contact with the inner periphery of the piston cylinder (1).

4. A gas pipeline filtering device according to claim 3, characterized in that: A through groove (40) is provided at one end of the piston cylinder (1), a piston tube (41) is movably provided in the through groove (40), the piston tube (41) is fixedly mounted on the piston (4), a piston plate (42) is airtightly slidably mounted in the piston tube (41), a threaded through hole (45) is provided at the upper end of the piston tube (41), a thin screw (43) is mounted in the threaded through hole (45), the lower end of the thin screw (43) is rotatably connected to the piston plate (42) through a bearing, and the piston tube (41) is respectively connected to the annular airbag (31).

5. A gas pipeline filtering device according to claim 4, characterized in that: An air passage (50) is provided in the piston (4), the air passage (50) is communicated with the interior of the piston tube (41), and the air passage (50) is communicated with the annular air bag (31) via a connecting pipe (51).

6. A gas pipeline filtering device according to claim 1, characterized in that: The outer peripheral thread of the screw rod (9) is matched with a nut (60), and the nut (60) is fixed on the piston cylinder (1).

7. The gas pipeline filtering device according to claim 1, characterized in that: An air inlet pipe (71) connected to the air inlet (2) is fixedly provided on the piston cylinder (1), and an air outlet pipe (72) connected to the air outlet (3) is fixedly provided on the piston cylinder (1).

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