A filter device

Abstract

The utility model belongs to filter technical field provides a kind of filtering device, including cylinder, filter core plug and the filter core being located in cylinder, and the both ends along the length direction of cylinder respectively have first port and second port, and filter core has inner cavity;The outer diameter of filter core plug is greater than the outer diameter of filter core and less than the inner diameter of cylinder, and one end of filter core plug is tightly pressed on one end in cylinder, and first port is communicated with inner cavity;The outer wall of filter core and the inner wall of cylinder form outer cavity, and outer cavity and inner cavity are communicated, and output channel communicated with outer cavity is provided in filter core plug;Connector is provided on filter core plug, and cylinder is provided with connecting part.The utility model communicates first port with inner cavity, and outer cavity is communicated with output channel, when medium flows reversely, medium can also pass through filter core and is filtered, and sundries in medium is intercepted, and sundries can be avoided to enter into the air-tightness detection equipment of external device.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, specifically a filter device. Background Technology

[0002] Filters play a vital role in numerous fields, including industrial production, environmental management, and fluid transportation. They are indispensable key equipment in all aspects of modern production and daily life. In industrial manufacturing, the petrochemical industry uses filters to remove impurities from oils, preventing equipment wear and pipeline blockages, and ensuring safe and stable production. In electronics manufacturing, ultra-precision filters are used to purify photoresist and ultrapure water, ensuring high precision and yield rates in chip manufacturing. In environmental management, high-efficiency filters adsorb dust and harmful gases in air pollution control; wastewater treatment plants use filters to separate suspended solids and microorganisms from water, improving water quality. In daily life, filters in household gas purifiers and water purifiers also create a clean and healthy living environment.

[0003] In existing technologies, airtightness testing equipment requires the discharge of the medium. However, the pressure change in the pipeline during the discharge process can cause the medium to flow in reverse. As a result, impurities in the tested object will enter the testing system with the flow of the medium, causing secondary pollution and affecting the accuracy of the test results and the service life of the equipment. Therefore, a filtration device is needed that can filter out impurities in the medium when it flows in reverse. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a filtration device. This device connects the first port to the inner cavity and the outer cavity to the output channel. When the medium is introduced from the first port, the medium first enters the inner cavity, then passes through the outer wall of the filter element and enters the inner cavity again. It then flows from the inner cavity to the output channel and is discharged. Therefore, when the medium flows in the reverse direction, the medium can also pass through the filter element for filtration, intercepting impurities in the medium and preventing impurities from entering the external airtightness testing equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A filtration device includes a cylindrical body, a filter element plug, and a filter element disposed within the cylindrical body. The cylindrical body has a first port and a second port at its two ends along its length, and the filter element has an inner cavity.

[0007] The outer diameter of the filter element plug is larger than the outer diameter of the filter element and smaller than the inner diameter of the cylinder. One end of the filter element plug presses the filter element against one end of the cylinder and connects the first port with the inner cavity.

[0008] The outer wall of the filter element and the inner wall of the cylinder form an outer cavity, the outer cavity and the inner cavity are connected, and the filter element plug is provided with an output channel that communicates with the outer cavity;

[0009] The filter element plug is provided with a connector, and the cylinder is provided with a connecting part. The connector and the connecting part cooperate to fix the filter element plug and seal the second port.

[0010] In the above-mentioned filtration device, the two ends of the filter plug are respectively connected to the insertion post and the connecting post. The outer diameters of the insertion post, the filter plug and the connecting post increase sequentially, and the outer diameter of the connecting post is smaller than the inner diameter of the cylinder. The insertion post is used to insert into the inner cavity. The connector is connected to the connecting post. The output channel is located in the filter plug and the connecting post.

[0011] In one of the above-mentioned filtering devices, the connector includes a first sealing ring and a nut. The nut is connected to the connecting post and forms a first limiting step with the connecting post. The first sealing ring is sleeved on the connecting post and abuts against the first limiting step.

[0012] The end of the cylinder away from the first port is provided with an annular protrusion, which forms a connecting part on the end of the cylinder. The nut is pressed against the annular protrusion and seals the second port. The first sealing ring is clamped between the annular protrusion and the nut.

[0013] In the aforementioned filtration device, the output channel includes a first section and a second section that are interconnected. The first section is located in the filter element plug and communicates with the outer cavity; the second section is located in the connecting column, and the outer cavity communicates with the outside through the first section and the second section.

[0014] In one of the above-mentioned filtering devices, a first connecting joint is provided at the end of the cylinder near the first port, and the first connecting joint is connected to the first port.

[0015] In one of the above-mentioned filtering devices, a second connecting connector is provided at the end of the connecting column away from the insertion column, and the second connecting connector is connected to the output channel.

[0016] In one of the above-mentioned filtering devices, the cylinder is further provided with a fixing plate, and the fixing plate is provided with multiple threaded holes.

[0017] In one of the aforementioned filtration devices, the first section penetrates the filter element plug.

[0018] In one of the above-mentioned filtration devices, a second sealing ring is also included. The outer diameter of the second sealing ring is larger than the inner diameter of the cylinder. The filter element plug and the connecting column form a second limiting step. The second sealing ring is sleeved on the filter element plug and abuts against the outer wall and the inner wall of the cylinder.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention connects the first port to the inner cavity and the outer cavity to the output channel. When the medium is introduced from the first port, the medium first enters the inner cavity, then passes through the outer wall of the filter element and enters the inner cavity again. It then flows from the inner cavity to the output channel and is discharged. Therefore, when the medium flows in the reverse direction, it can also pass through the filter element for filtration, intercepting impurities in the medium and preventing impurities from entering the external airtightness testing equipment. Attached Figure Description

[0021] Figure 1 This is a perspective view of a filtration device according to Embodiment 1;

[0022] Figure 2 This is a cross-sectional view of a filtering device according to Embodiment 1;

[0023] Figure 3 This is an exploded view of a filtration device according to Example 1;

[0024] Figure 4 This is a perspective view of the cylinder of a filter device according to Embodiment 1;

[0025] Figure 5 This is a perspective view of the filter cartridge plug of a filtration device according to Embodiment 1;

[0026] Figure 6 This is a cross-sectional view of the filter element plug of a filtration device according to Embodiment 1;

[0027] The figure labels for each figure are as follows:

[0028] 1. Cylinder; 11. First port; 12. First connecting joint; 13. Second port; 14. Fixing plate; 141. Threaded hole; 15. Connecting part; 151. Annular protrusion; 2. Filter element plug; 21. Insert post; 22. Connecting post; 221. Second connecting joint; 23. Output channel; 231. First section; 232. Second section; 3. Filter element; 31. Inner cavity; 4. Connecting piece; 41. First sealing ring; 42. Nut; 5. Outer cavity; 6. Second sealing ring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] refer to Figures 1-6 A filtration device includes a cylindrical body 1, a filter plug 2, and a filter element disposed inside the cylindrical body 1. The cylindrical body 1 has a first port 11 and a second port 13 at both ends along its length direction. The filter element has an inner cavity 31.

[0032] The outer diameter of the filter plug 2 is larger than the outer diameter of the filter element 3 and smaller than the inner diameter of the cylinder 1. One end of the filter plug 2 presses the filter element 3 against one end inside the cylinder 1 and connects the first port 11 with the inner cavity 31.

[0033] The outer wall of the filter element 3 and the inner wall of the cylinder 1 form an outer cavity 5. The outer cavity 5 and the inner cavity 31 are connected. The filter element plug 2 is provided with an output channel 23 that is connected to the outer cavity 5.

[0034] The filter plug 2 is provided with a connector 4, and the cylinder 1 is provided with a connecting part 15. The connector 4 and the connecting part 15 cooperate to fix the filter plug 2 and seal the second port 13.

[0035] It should be noted that in this embodiment, the air supply end of the external airtightness detection device is connected to the first port 11 via a pipe.

[0036] It should be noted that the medium can be gas or liquid; in this embodiment, gas is used as an example.

[0037] In this design, the air supply end of the external airtightness testing device is connected to the first port 11 via a pipe, and the output channel 23 can be connected to the test object of the external device via a pipe. Since one end of the filter plug 2 presses against one end of the filter element 3 inside the cylinder 1, the first port 11 is connected to the inner cavity 31, and the other end of the inner cavity 31 is sealed by the filter plug 2. When the external airtightness testing device exhausts gas, the gas enters the inner cavity 31 of the filter element 3 through the first port 11. Then, the gas passes through the filter element 3, intercepting impurities in the gas. The gas then enters the outer cavity 5, and flows to the output channel 23. The gas in the output channel 23 then enters the test object of the external device through the pipe. When the gas flows in reverse, the gas flows from the output channel 23 to the outer cavity 5, and then passes through the filter element 3 from the outer cavity 5 into the inner cavity 31. Therefore, even when the gas flows in reverse, it will be intercepted by the filter element 3 to prevent the impurities from re-entering the airtightness testing equipment of the external device. Moreover, the cooperation between the connector 4 and the connector 15 can facilitate the disassembly of the filter element plug 2 to facilitate the replacement of the filter element 3.

[0038] After the test is completed, the output channel 23 is disconnected from the test object of the external device. The air tightness test device of the external device blows air into the filter element 3 in the cylinder 1, so that the impurities in the filter element 3 are discharged from the filter element through the inner cavity 31, to the outer cavity 5, and then through the output channel 23.

[0039] The filter element can use a 3μm polytetrafluoroethylene filter screen, which can efficiently intercept tiny solid impurities in the detection medium.

[0040] In this embodiment, the filter plug 2 is connected to a post 21 and a connecting post 22 at both ends, respectively. The outer diameters of the post 21, the filter plug 2, and the connecting post 22 increase sequentially, and the outer diameter of the connecting post 22 is smaller than the inner diameter of the cylinder 1. The post 21 is used to insert into the inner cavity 31. The connector 4 is connected to the connecting post 22. The output channel 23 is located inside the filter plug 2 and the connecting post 22.

[0041] The connector 4 includes a first sealing ring 41 and a nut 42. The nut 42 is connected to the connecting post 22 and forms a first limiting step with the connecting post 22. The first sealing ring 41 is sleeved on the connecting post 22 and abuts against the first limiting step.

[0042] An annular protrusion 151 is provided on the end of the cylinder 1 away from the first port 11. The annular protrusion 151 forms a connecting part 15 on the end of the cylinder 1. The nut 42 abuts against the annular protrusion 151 and seals the second port 13. The first sealing ring 41 is clamped between the annular protrusion 151 and the nut 42.

[0043] Specifically, the first sealing ring 41 uses 304 stainless steel as the winding skeleton and is filled with flexible graphite material. It has a pressure resistance rating of ≥30MPa and can withstand the pressure impact under high pressure environment, providing a basic guarantee for sealing.

[0044] When assembling the filter device, first, the first sealing ring 41 is put onto the column of the connecting column 22 and pressed against the first limiting step (not shown in the figure). Then, the insert column 21 is inserted into the inner cavity 31 of the filter element 3 to initially fix the filter element 3. After that, the first sealing ring 41 is aligned with the position of the annular protrusion 151 and the filter element plug 2 is inserted into the cylinder 1. When inserting, under the limiting of the nut 42, the first sealing ring 41 is forcefully inserted into the annular protrusion 151. After the first sealing ring 41 is inserted, the filter element plug 2 presses the filter element 3 against one end of the cylinder 1 and connects the inner cavity 31 of the filter element 3 with the first opening end, thus completing the installation of the filter element 3.

[0045] When filter element 3 needs to be replaced, hold the nut 42 and pull out the filter element plug 2, then pull out the filter element 3. Use compressed air to blow out the connection between the filter element and the insert to remove debris, and then replace it with a new filter element. To clean the filter element, follow the same steps as above: pull out the filter element, and then use compressed air to blow out the filter element and the connection between the filter element and the insert to remove debris and maintain the filtration performance of the filter element.

[0046] Preferably, it also includes a second sealing ring 6, the outer diameter of which is larger than the inner diameter of the cylinder 1, the filter plug 2 and the connecting post 22 form a second limiting step (not shown in the figure), the second sealing ring 6 is sleeved on the filter plug 2 and abuts against the outer wall and the inner wall of the cylinder 1.

[0047] Generally, the second sealing ring 6 is made of fluororubber, which has good temperature resistance and can adapt to the temperature range of -40℃ to 200℃. It can maintain good elasticity and sealing performance in different temperature environments, effectively making up for the shortcomings of the first sealing ring 41 in terms of temperature adaptability.

[0048] After the first sealing ring 41 is fitted onto the column of the connecting column 22, the second sealing ring 6 is fitted onto the filter element plug 2 and pressed against the second limiting step. In this way, when the filter element plug 2 is inserted into the cylinder 1 to a certain depth, the filter element 3 is pressed against the filter element plug 2, and the second sealing ring 6 will be pressed against the outer wall of the filter element plug 2 and the inner wall of the cylinder 1.

[0049] In this embodiment, the output channel 23 includes a first segment 231 and a second segment 232 that are interconnected. The first segment 231 is located inside the filter plug 2 and communicates with the outer cavity 5. The second segment 232 is located inside the connecting post 22. The outer cavity 5 is connected to the external test object through the first segment 231 and the second segment 232.

[0050] Preferably, the end of the cylinder 1 near the first port 11 is provided with a first connecting joint 12, and the first connecting joint 12 is connected to the first port 11;

[0051] The end of the connecting post 22 away from the insertion post 21 is also provided with a second connecting connector 221, which is connected to the output channel 23.

[0052] The first segment 231 penetrates the filter element plug 2.

[0053] Furthermore, the first connector 12 is connected to the external airtightness testing equipment through a pipeline. After passing through the first connector 12 and the first port 11, the gas enters the inner cavity 31. After passing through the outer wall of the filter element 3, the gas enters the outer cavity 5, and then enters the first section 231 and the second section 232 from the outer cavity 5. The gas in the second section 232 passes through the second connector 221 and is then output to the test object of the external equipment.

[0054] More preferably, the cylinder 1 is further provided with a fixing plate 14, and the fixing plate 14 is provided with a plurality of threaded holes 141. Providing a fixing plate 14 and threaded holes 141 on the fixing plate 14 can facilitate the fixing of the filter device.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements or modifications can be made without departing from the principle of the present utility model, and these improvements or modifications should also be considered within the protection scope of the present utility model.

Claims

1. A filtration device, comprising a cylindrical body, a filter element plug, and a filter element disposed within the cylindrical body, wherein the cylindrical body has a first port and a second port at its two ends along its length, and the filter element has an inner cavity; Its features are, The outer diameter of the filter element plug is larger than the outer diameter of the filter element and smaller than the inner diameter of the cylinder. One end of the filter element plug presses the filter element against one end of the cylinder and connects the first port with the inner cavity. The outer wall of the filter element and the inner wall of the cylinder form an outer cavity, the outer cavity and the inner cavity are connected, and the filter element plug is provided with an output channel that communicates with the outer cavity; The filter element plug is provided with a connector, and the cylinder is provided with a connecting part. The connector and the connecting part cooperate to fix the filter element plug and seal the second port.

2. The filtration device according to claim 1, characterized in that, The filter plug has insertion posts and connecting posts at both ends. The outer diameters of the insertion posts, filter plug, and connecting posts increase sequentially, and the outer diameter of the connecting posts is smaller than the inner diameter of the cylinder. The insertion posts are used to insert into the inner cavity, and the connecting parts are connected to the connecting posts. The output channel is located inside the filter plug and the connecting posts.

3. A filtration device according to claim 2, characterized in that, The connector includes a first sealing ring and a nut. The nut is connected to the connecting post and forms a first limiting step with the connecting post. The first sealing ring is sleeved on the connecting post and abuts against the first limiting step. The end of the cylinder away from the first port is provided with an annular protrusion, which forms a connecting part on the end of the cylinder. The nut is pressed against the annular protrusion and seals the second port. The first sealing ring is clamped between the annular protrusion and the nut.

4. A filtration device according to claim 3, characterized in that, The output channel includes a first section and a second section that are interconnected. The first section is located inside the filter plug and communicates with the outer cavity. The second section is located inside the connecting column. The outer cavity is connected to the external test object through the first section and the second section.

5. A filtration device according to claim 1, characterized in that, The cylinder is provided with a first connecting joint at one end near the first port, and the first connecting joint is connected to the first port.

6. A filtration device according to claim 2, characterized in that, The end of the connecting post away from the insertion post is also provided with a second connecting connector, which is connected to the output channel.

7. A filtration device according to claim 1, characterized in that, The cylinder is also provided with a fixing plate, and the fixing plate is provided with multiple threaded holes.

8. A filtration device according to claim 4, characterized in that, The first section penetrates the filter element plug.

9. A filtration device according to claim 2, characterized in that, It also includes a second sealing ring, the outer diameter of which is larger than the inner diameter of the cylinder. The filter element plug and the connecting column form a second limiting step. The second sealing ring is sleeved on the filter element plug and abuts against the outer wall and the inner wall of the cylinder.

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