Filter, filtering assembly and filtering system

Abstract

The utility model relates to the technical field of fuel gas distribution, in particular to a filter, a filter assembly and a filter system, which comprise an outer barrel, a first connecting seat, a second connecting seat, an inner barrel and a filter element, the first connecting seat is detachably connected with one end of the outer cylinder body; the second connecting seat is detachably connected with the other end of the outer cylinder body; waste liquid flowing out of the blow-down valve sequentially flows through the waste liquid inflow hole, the waste liquid flowing-through cavity, the drainage hole and the waste liquid outflow hole and then is discharged into the working environment, the situation that the interior of the fuel gas pressure regulating box and the working environment are polluted when the waste liquid is discharged is avoided, and potential safety hazards are reduced. During regular maintenance, the filter element and other parts can be disassembled and replaced on site, so that the field maintenance of the filter is relatively convenient, and the filtering effect of the filter in the long-term use process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas distribution, in particular to a filter, a filtering component and a filtering system. Background Technique

[0002] With the development of the economic society, natural gas, as an efficient and clean energy source, has been widely used. A gas pressure regulating box is arranged on the gas distribution pipeline, and a gas filtering device is installed in the gas pressure regulating box. Due to reasons such as different gas qualities, pipelines and construction, there will be a certain amount of water accumulation, sediment, rust, sludge and other sundries in the gas distribution pipeline, and these sundries will be mixed into the gas. The gas filtering device is used to filter and purify the gas to ensure the safe and stable operation of subsequent equipment.

[0003] In daily operation and management, it is necessary to regularly inspect the gas pressure regulating box. The gas filtering device discharges the waste liquid through a drain port and a drain valve. Due to the relatively high pressure in the gas filtering device, the waste liquid is directly sprayed into the gas pressure regulating box and the working environment, causing pollution to the inside of the gas pressure regulating box and the working environment. When the waste liquid flows out, it carries a certain amount of gas. Since the gas filtering device is often fixedly installed at the bottom inside the gas pressure regulating box, the gas carried by the waste liquid when flowing out accumulates in the gas pressure regulating box, posing a great safety hazard. In order to avoid polluting the inside of the gas pressure regulating box during waste liquid discharge and reduce the safety hazard, people connect the drain valve with a hose and lead the waste liquid out of the gas pressure regulating box by means of the hose. However, leading the waste liquid out of the gas pressure regulating box by means of the hose will still cause pollution to the working environment. Therefore, people begin to connect a filter to the drain valve. The filter can remove the sundries in the waste liquid and reduce the pollution of the discharged waste liquid to the working environment.

[0004] However, during the long-term use of traditional filters, regular maintenance is required. It is rather inconvenient to perform on-site maintenance on traditional filters. Content of the Utility Model

[0005] The utility model provides a filter, a filtering component and a filtering system to solve the problem that it is rather inconvenient to perform on-site maintenance on traditional filters.

[0006] The utility model provides a filter, comprising:

[0007] An outer cylinder;

[0008] A first connection seat detachably connected to one end of the outer cylinder; a waste liquid inflow hole is formed on the first connection seat;

[0009] A second connection seat detachably connected to the other end of the outer cylinder; a waste liquid outflow hole is formed on the second connection seat;

[0010] The inner cylinder is disposed inside the outer cylinder along the axis of the outer cylinder. A waste liquid flow-through cavity is formed inside, and a drain hole communicating with the waste liquid flow-through cavity is provided on the side wall; the waste liquid flow-through cavity communicates with the waste liquid inlet hole; the drain hole communicates with the waste liquid outlet hole; one end of the inner cylinder close to the first connection seat is an open structure;

[0011] The filter element is disposed inside the waste liquid flow-through cavity; when the inner cylinder is removed from the outer cylinder, the filter element can penetrate into the inside of the inner cylinder or penetrate out of the inner cylinder through the open end of the inner cylinder.

[0012] In some embodiments, a first mounting hole is provided on the first connection seat. Correspondingly, a first mounting hole is also provided at one end of the outer cylinder close to the first connection seat. The first connection seat and the outer cylinder are fixedly connected through the first mounting hole by using a first fastening member.

[0013] In some embodiments, a second mounting hole is provided on the second connection seat. Correspondingly, a second mounting hole is also provided at one end of the outer cylinder close to the second connection seat. The second connection seat and the outer cylinder are fixedly connected through the second mounting hole by using a second fastening member.

[0014] In some embodiments, the filter element is formed by curling a filter net with tension.

[0015] In some embodiments, one end of the inner cylinder close to the second connection seat is a closed structure to form a debris temporary storage cavity inside one end of the inner cylinder close to the second connection seat; the debris temporary storage cavity communicates with the waste liquid flow-through cavity.

[0016] In some embodiments, it further includes:

[0017] The first positioning and mounting portion is fixedly mounted on the inner cylinder;

[0018] And / or, the second positioning and mounting portion is fixedly mounted on the inner cylinder.

[0019] In some embodiments, it further includes:

[0020] The first sealing portion is disposed at the connection between the first connection seat and the outer cylinder;

[0021] And / or, the second sealing portion is disposed at the connection between the second connection seat and the outer cylinder;

[0022] And / or, the third sealing portion is disposed at the connection between the waste liquid inlet hole and the waste liquid flow-through cavity.

[0023] In some embodiments, a first waste liquid inlet pipe is formed at one end of the first connection seat away from the outer cylinder;

[0024] And / or, a first waste liquid outlet pipe is formed at one end of the second connection seat away from the outer cylinder.

[0025] On the other hand, the present utility model further provides a filtering component, which includes a second waste liquid inflow pipe, a second waste liquid outflow pipe, and the filter provided in any of the above embodiments; a first connection seat is connected to the second waste liquid inflow pipe; a second connection seat is connected to the second waste liquid outflow pipe.

[0026] On yet another aspect, the present utility model further provides a filtering system, which includes a gas filtering device, a sewage discharge valve, and the filtering component provided in any of the above embodiments;

[0027] One end of the sewage discharge valve is connected to the sewage discharge port of the gas filtering device;

[0028] The first connection seat is connected to the other end of the sewage discharge valve or is connected to the other end of the sewage discharge valve through the second waste liquid inflow pipe.

[0029] The beneficial effects of the present utility model are as follows: The filter of the present utility model is provided with an outer cylinder, a first connection seat, a second connection seat, an inner cylinder, and a filter element. The first connection seat is detachably connected to one end of the outer cylinder. The second connection seat is detachably connected to the other end of the outer cylinder. The waste liquid flowing out from the sewage discharge valve sequentially flows through the waste liquid inflow hole, the waste liquid flowing through cavity, the drainage hole, and the waste liquid outflow hole and then is discharged into the working environment. When the waste liquid passes through the drainage hole, the filter element can effectively remove sundries such as sediment, rust, and sludge in the waste liquid, so that the waste liquid is converted into relatively clean water and discharged into the working environment. In this way, it is avoided that the waste liquid pollutes the interior of the gas pressure regulating box and the working environment during discharge, and the potential safety hazard is reduced. During regular maintenance, the filter element and other components can be disassembled and replaced on-site, making the on-site maintenance of the filter more convenient and ensuring the filtering effect during the long-term use of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of some specific embodiments of a filter of the present utility model;

[0031] Figure 2 is a schematic structural diagram of some specific embodiments of a filtering component of the present utility model;

[0032] Figure 3 is a schematic structural diagram of some specific embodiments of a filtering system of the present utility model.

[0033] In the attached drawings, 110 is the outer cylinder; 120 is the first connection seat; 121 is the waste liquid inflow hole; 122 is the first waste liquid inflow pipe; 130 is the second connection seat; 131 is the waste liquid outflow hole; 132 is the first waste liquid outflow pipe; 140 is the inner cylinder; 141 is the waste liquid flow-through cavity; 142 is the drain hole; 143 is the debris temporary storage cavity; 150 is the filter element; 161 is the first fastener; 162 is the second fastener; 171 is the first positioning and installation part; 172 is the second positioning and installation part; 181 is the first sealing part; 182 is the second sealing part; 183 is the third sealing part; 210 is the second waste liquid inflow pipe; 220 is the second waste liquid outflow pipe; 310 is the gas filtration device; 320 is the drain valve. Detailed implementation manners

[0034] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] As in the background art, it is relatively inconvenient to perform on-site maintenance on traditional filters.

[0036] To solve the above problems, refer to Figure 1, the present utility model provides a filter, which includes an outer cylinder body 110, a first connection seat 120, a second connection seat 130, an inner cylinder body 140 and a filter element 150. The first connection seat 120 is detachably connected to one end of the outer cylinder body 110. A waste liquid inflow hole 121 is formed on the first connection seat 120. The second connection seat 130 is detachably connected to the other end of the outer cylinder body 110. A waste liquid outflow hole 131 is formed on the second connection seat 130. The inner cylinder body 140 is disposed inside the outer cylinder body 110 along the axis of the outer cylinder body 110, and a waste liquid flowing through cavity 141 is formed inside. A drainage hole 142 communicating with the waste liquid flowing through cavity 141 is provided on the side wall. The waste liquid flowing through cavity 141 communicates with the waste liquid inflow hole 121. The drainage hole 142 communicates with the waste liquid outflow hole 131. One end of the inner cylinder body 140 close to the first connection seat 120 is an open structure. The filter element 150 is disposed inside the waste liquid flowing through cavity 141. The first connection seat 120 can be connected to and communicate with one end of the sewage discharge valve 320 away from the gas filtering device 310. The waste liquid flowing out of the sewage discharge valve 320 sequentially flows through the waste liquid inflow hole 121, the waste liquid flowing through cavity 141, the drainage hole 142 and the waste liquid outflow hole 131 and then is discharged into the working environment. When the waste liquid passes through the drainage hole 142, the filter element 150 can effectively remove sundries such as sediment, rust and sludge in the waste liquid, so that the waste liquid is converted into relatively clean water and discharged into the working environment. In this way, the pollution of the inside of the gas pressure regulating box and the working environment during the waste liquid discharge is avoided, and the potential safety hazard is reduced. During regular maintenance, first detach the second connection seat 130 from the outer cylinder body 110, and then move the inner cylinder body 140 out of the outer cylinder body 110. At this time, the filter element 150 can penetrate into the inside of the inner cylinder body 140 through the open end of the inner cylinder body 140 or penetrate out of the inner cylinder body 140 through the open end of the inner cylinder body 140. Compared with the traditional filter, the filter element 150 and other components can be disassembled and replaced on site, so that the on-site maintenance of the filter is more convenient, and the filtering effect during the long-term use of the filter is guaranteed.

[0037] It should be noted that the wall thickness of the inner cylinder body 140 is more than 5 mm, and the material is steel, which has a certain strength and can withstand high pressure.

[0038] Specifically, in the exemplary embodiment, a first mounting hole is provided on the first connection seat 120. Correspondingly, a first mounting hole is also provided at one end of the outer cylinder body 110 close to the first connection seat 120. The first connection seat 120 and the outer cylinder body 110 are fixedly connected through the first mounting hole by using a first fastener 161.

[0039] Preferably, the first mounting hole can be a threaded hole. Correspondingly, the first fastener 161 is a screw. The screw is used to fixedly connect the first connecting seat 120 and the outer cylinder 110 through the threaded hole. The first mounting hole can also be a socket hole. Correspondingly, the first fastener 161 is a dowel pin. The dowel pin is inserted into the socket hole to fixedly connect the first connecting seat 120 and the outer cylinder 110. Of course, a clamping groove or a clamping block can also be provided on the side wall of the first connecting seat 120. Correspondingly, a clamping block or a clamping groove is provided on the inner wall of the end of the outer cylinder 110 close to the first connecting seat 120. The clamping block and the clamping groove are adapted to each other, and the first connecting seat 120 and the outer cylinder 110 are detachably connected through the clamping block and the clamping groove.

[0040] Preferably, the first mounting holes are provided on one side, two sides, three sides or four sides of the first connecting seat 120. Correspondingly, the first mounting holes are also provided on one side, two sides, three sides or four sides of the end of the outer cylinder 110 close to the first connecting seat 120. The first connecting seat 120 and the outer cylinder 110 are fixedly connected by using the first fastener 161 through the first mounting holes on each side. More first mounting holes can improve the connection stability between the first connecting seat 120 and the outer cylinder 110, while fewer first mounting holes can improve the assembly efficiency of the first connecting seat 120 and the outer cylinder 110.

[0041] Preferably, the diameter of the end of the outer cylinder 110 close to the first connecting seat 120 is larger than or smaller than the diameter of the first connecting seat 120.

[0042] Specifically, in the exemplary embodiment, second mounting holes are provided on the second connecting seat 130. Correspondingly, second mounting holes are also provided on the end of the outer cylinder 110 close to the second connecting seat 130. The second connecting seat 130 and the outer cylinder 110 are fixedly connected by using the second fastener 162 through the second mounting holes.

[0043] Preferably, the second mounting hole can be a threaded hole. Correspondingly, the second fastener 162 is a screw rod. The screw rod is used to fixedly connect the second connecting seat 130 and the outer cylinder 110 through the threaded hole. The second mounting hole can also be a socket hole. Correspondingly, the second fastener 162 is a dowel pin. The dowel pin is inserted into the socket hole to fixedly connect the second connecting seat 130 and the outer cylinder 110. Of course, a clamping groove or a clamping block can also be provided on the side wall of the second connecting seat 130. Correspondingly, a clamping block or a clamping groove is provided on the inner wall of the end of the outer cylinder 110 close to the second connecting seat 130. The clamping block and the clamping groove are adapted to each other, and the second connecting seat 130 and the outer cylinder 110 are detachably connected through the clamping block and the clamping groove.

[0044] Preferably, second mounting holes are provided on one side, two sides, three sides or four sides of the second connection seat 130. Correspondingly, second mounting holes are also provided on one side, two sides, three sides or four sides of one end of the outer cylinder 110 close to the second connection seat 130. The second connection seat 130 and the outer cylinder 110 are fixedly connected by using second fasteners 162 through the second mounting holes on each side. A larger number of second mounting holes can improve the stability of the connection between the second connection seat 130 and the outer cylinder 110, while a smaller number of second mounting holes can improve the assembly efficiency of the second connection seat 130 and the outer cylinder 110.

[0045] Preferably, the diameter of one end of the outer cylinder 110 close to the second connection seat 130 is larger than or smaller than the diameter of the second connection seat 130.

[0046] Preferably, a rotary handwheel or a holding block is provided at one end of the second fastener 162 away from the second mounting seat, so as to facilitate the on-site direct assembly of the second connection seat 130 and the outer cylinder 110 by hand without the need to use tools such as screwdrivers.

[0047] Specifically, in the exemplary embodiment, the filter element 150 is formed by curling a stainless steel mesh with a rectangular structure having tension. With the tension of the mesh, the side wall of the filter element 150 can be attached to the inner wall of the inner cylinder 140. On the one hand, after the filter element 150 is taken out from the inner cylinder 140, the two sides of the filter element 150 move away from each other to present a rectangular structure, which is convenient for cleaning the debris on the filter element 150, prolonging the service life of the filter element 150, and ensuring the filtering effect during the long-term use of the filter element 150. On the other hand, it is convenient to adjust the size of the filter element 150 according to the diameter of the inner cylinder 140 on site, improving the applicability of the filter element 150 and facilitating the disassembly and assembly of the filter element 150.

[0048] Specifically, in the exemplary embodiment, one end of the inner cylinder 140 close to the second connection seat 130 is a closed structure to form a debris temporary storage cavity 143 inside one end of the inner cylinder 140 close to the second connection seat 130. The debris temporary storage cavity 143 is communicated with the waste liquid flowing cavity 141. During the use of the filter, the axis is vertically arranged, and the debris temporary storage cavity 143 is located below the waste liquid flowing cavity 141. The debris in the waste liquid and the debris falling off from the filter element 150 can be effectively collected in the debris temporary storage cavity 143 to slow down the speed of filter clogging. In order to improve the flow rate of the filtered waste liquid flowing out of the waste liquid flowing cavity 141, a plurality of layers and columns of drain holes 142 are provided on the side wall of the inner cylinder 140. The plurality of layers of drain holes 142 are uniformly distributed along the axial direction of the inner cylinder 140. The plurality of columns of drain holes 142 are uniformly distributed along the circumferential direction of the inner cylinder 140.

[0049] Specifically, in the exemplary embodiment, the filter further includes a first positioning and mounting portion 171 and / or a second positioning and mounting portion 172. The first positioning and mounting portion 171 is fixedly mounted on the side wall of the inner cylinder 140 near one end close to the first connecting seat 120, or on the side wall of the middle portion of the inner cylinder 140, or on the side wall of the inner cylinder 140 near one end close to the second connecting seat 130, which can enable the positioning and mounting of the inner cylinder 140 and improve the assembly efficiency of the inner cylinder 140 and the outer cylinder 110. The second positioning and mounting portion 172 is fixedly mounted on the side wall of the inner cylinder 140 near one end close to the second connecting seat 130, or on the side wall of the middle portion of the inner cylinder 140, or on the side wall of the inner cylinder 140 near one end close to the first connecting seat 120, which can enable the positioning and mounting of the inner cylinder 140 and improve the assembly efficiency of the inner cylinder 140 and the outer cylinder 110.

[0050] Preferably, the first positioning and mounting portion 171 is a positioning ring sleeved on the side wall of the inner cylinder 140.

[0051] Preferably, the second positioning and mounting portion 172 is a positioning ring. A through hole is provided in the second positioning and mounting portion 172 for the waste liquid flowing out of the drain hole 142 to flow to the waste liquid outflow hole 131.

[0052] Specifically, in the exemplary embodiment, the filter further includes a first sealing portion 181 and / or a second sealing portion 182 and / or a third sealing portion 183. The first sealing portion 181 is disposed at the connection between the first connecting seat 120 and the outer cylinder 110 to improve the sealing performance at the connection between the first connecting seat 120 and the outer cylinder 110. The second sealing portion 182 is disposed at the connection between the second connecting seat 130 and the outer cylinder 110 to improve the sealing performance at the connection between the second connecting seat 130 and the outer cylinder 110. The third sealing portion 183 is disposed at the connection between the waste liquid inlet hole 121 and the waste liquid flowing cavity 141 to improve the sealing performance at the connection between the waste liquid inlet hole 121 and the waste liquid flowing cavity 141.

[0053] It should be noted that when the diameter of the end of the outer cylinder 110 close to the first connecting seat 120 is larger than the diameter of the first connecting seat 120, the first sealing portion 181 is arranged between the inner wall of the outer cylinder 110 and the outer wall of the first connecting seat 120; when the diameter of the end of the outer cylinder 110 close to the first connecting seat 120 is smaller than the diameter of the first connecting seat 120, the first sealing portion 181 is arranged between the outer wall of the outer cylinder 110 and the inner wall of the first connecting seat 120. When the diameter of the end of the outer cylinder 110 close to the second connecting seat 130 is larger than the diameter of the second connecting seat 130, the second sealing portion 182 is arranged between the inner wall of the outer cylinder 110 and the outer wall of the second connecting seat 130; when the diameter of the end of the outer cylinder 110 close to the second connecting seat 130 is smaller than the diameter of the second connecting seat 130, the second sealing portion 182 is arranged between the outer wall of the outer cylinder 110 and the inner wall of the second connecting seat 130.

[0054] Preferably, the first sealing portion 181 can be a sealing ring to ensure the sealing effect and improve the disassembly and assembly efficiency. The first sealing portion 181 can also be a filler such as foam. The second sealing portion 182 can be a sealing ring to ensure the sealing effect and improve the disassembly and assembly efficiency. The second sealing portion 182 can also be a filler such as foam. The third sealing portion 183 can be a sealing ring to ensure the sealing effect and improve the disassembly and assembly efficiency. The third sealing portion 183 can also be a filler such as foam.

[0055] Specifically, in the exemplary embodiment, a first waste liquid inlet pipe 122 is formed at the end of the first connecting seat 120 away from the outer cylinder 110 to facilitate the connection of the first connecting seat 120 with the sewage discharge valve 320 / other pipelines. And / or, a first waste liquid outlet pipe 132 is formed at the end of the second connecting seat 130 away from the outer cylinder 110.

[0056] Preferably, the materials of the first waste liquid inlet pipe 122 and the first waste liquid outlet pipe 132 can be rigid materials such as hard plastic, steel, and iron to improve the regularity of the pipeline layout. The materials of the first waste liquid inlet pipe 122 and the first waste liquid outlet pipe 132 can also be flexible materials such as soft plastic, silica gel, or rubber to reduce the space occupied by the pipeline layout and have a certain deflection.

[0057] Preferably, threads are provided on the inner wall and / or outer wall of the end of the first waste liquid inlet pipe 122 away from the outer cylinder 110. Threads are provided on the inner wall and / or outer wall of the end of the first waste liquid outlet pipe 132 away from the outer cylinder 110.

[0058] Refer to Figure 2, the present utility model also provides a filtering component, including a second waste liquid inflow pipe 210, a second waste liquid outflow pipe 220, and the filter provided in any of the above embodiments. The first connection seat 120 is connected to the second waste liquid inflow pipe 210. One end of the second waste liquid inflow pipe 210 away from the first connection seat 120 can be connected to the sewage discharge valve 320. The second connection seat 130 is connected to the second waste liquid outflow pipe 220. The waste liquid flowing out from the sewage discharge valve 320 flows through the second waste liquid inflow pipe 210, the waste liquid inflow hole 121, the waste liquid flowing through cavity 141, the drainage hole 142, the waste liquid outflow hole 131, and the second waste liquid outflow pipe 220 in sequence and then is discharged into the working environment. When the waste liquid passes through the drainage hole 142, the filter element 150 can effectively remove sundries such as sediment, rust, and sludge in the waste liquid, so that the waste liquid is converted into relatively clean water and discharged into the working environment. In this way, the pollution of the interior of the gas pressure regulating box and the working environment during the discharge of the waste liquid is avoided, and the potential safety hazard is reduced. During regular maintenance, first detach the second connection seat 130 from the outer cylinder 110, and then move the inner cylinder 140 out of the outer cylinder 110. At this time, the filter element 150 can pass through the open end of the inner cylinder 140 into the interior of the inner cylinder 140 or pass through the open end of the inner cylinder 140 out of the inner cylinder 140. Compared with the traditional filtering component, the filter element 150 and other components can be disassembled and replaced on-site, making the on-site maintenance of the filter more convenient and ensuring the filtering effect during the long-term use of the filter.

[0059] It should be noted that the filter or the filtering component can not only be used in combination with the gas filtering device 310, but also be applied to similar working conditions, with strong versatility.

[0060] Refer to Figure 3 , the present utility model also provides a filtering system, including a gas filtering device 310, a sewage discharge valve 320, and the filtering component provided in any of the above embodiments. One end of the sewage discharge valve 320 is connected to the sewage discharge port of the gas filtering device 310. The first connection seat 120 is directly connected to the other end of the sewage discharge valve 320 or connected to the other end of the sewage discharge valve 320 through the second waste liquid inflow pipe 210. Overall, the pollution of the interior of the gas pressure regulating box and the working environment during the discharge of the waste liquid is avoided, and the potential safety hazard is reduced. During regular maintenance, the filter element 150 and other components can be disassembled and replaced on-site, making the on-site maintenance of the filter more convenient and ensuring the filtering effect during the long-term use of the filter.

[0061] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0063] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] In the present utility model, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation on the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A filter, characterized in that: include: outer cylinder; A first connecting seat is detachably connected to one end of the outer cylinder; a waste liquid inflow hole is formed on the first connecting seat; A second connecting seat is detachably connected to the other end of the outer cylinder; a waste liquid outflow hole is formed on the second connecting seat; The inner cylinder is arranged inside the outer cylinder along the axis of the outer cylinder, a waste liquid flow cavity is formed inside, and a leakage hole connected to the waste liquid flow cavity is opened on the side wall; the waste liquid flow cavity is connected to the waste liquid inflow hole; the leakage hole is connected to the waste liquid outflow hole; one end of the inner cylinder close to the first connecting seat is an open structure; The filter element is inserted into the waste liquid flow cavity; the inner cylinder is moved out of the outer cylinder, and the filter element can penetrate into the interior of the inner cylinder through the opening end of the inner cylinder or pass out of the inner cylinder through the opening end of the inner cylinder.

2. The filter according to claim 1, characterized in that The first connecting seat is provided with a first mounting hole, and correspondingly, the end of the outer cylinder close to the first connecting seat is also provided with the first mounting hole, and the first connecting seat and the outer cylinder are fixedly connected by a first fastener through the first mounting hole.

3. The filter according to claim 1, characterized in that The second connecting seat is provided with a second mounting hole, and correspondingly, the end of the outer cylinder close to the second connecting seat is also provided with the second mounting hole, and the second connecting seat and the outer cylinder are fixedly connected by a second fastener through the second mounting hole.

4. The filter according to claim 1, characterized in that The filter element is formed by curling a filter mesh with tension.

5. The filter according to any one of claims 1 to 4, characterized in that: One end of the inner cylinder close to the second connecting seat is a closed structure, so as to form a temporary storage chamber for debris inside the inner cylinder close to the second connecting seat; the temporary storage chamber for debris is communicated with the waste liquid flow chamber.

6. The filter according to any one of claims 1 to 4, characterized in that Also includes: A first positioning and mounting portion, fixedly mounted on the inner cylinder; And / or, the second positioning and mounting portion is fixedly mounted on the inner cylinder.

7. The filter according to any one of claims 1 to 4, characterized in that Also includes: A first sealing portion, provided at the connection between the first connecting seat and the outer cylinder; and / or, a second sealing portion, provided at a connection between the second connecting seat and the outer cylinder; And / or, a third sealing portion is arranged at the place where the waste liquid inlet hole and the waste liquid flow cavity are connected.

8. The filter according to any one of claims 1 to 4, characterized in that A first waste liquid inflow pipe is formed at one end of the first connecting seat away from the outer cylinder; And / or, a first waste liquid outflow pipe is formed at one end of the second connecting seat away from the outer cylinder.

9. A filter assembly, characterized in that: It comprises a second waste liquid inlet pipe, a second waste liquid outlet pipe and the filter according to any one of claims 1 to 8; the first connecting seat is connected to the second waste liquid inlet pipe; the second connecting seat is connected to the second waste liquid outlet pipe.

10. A filtering system, characterized in that: It comprises a gas filter device, a drain valve and the filter assembly according to claim 9; One end of the drain valve is connected to the drain port of the gas filter device; The first connecting seat is connected to the other end of the drain valve or is connected to the other end of the drain valve through the second waste liquid inflow pipe.

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