Sealed membrane support
By designing a sealed membrane retention, the sealing performance is ensured using the outer shell and sealing ring, and the replacement of the filter membrane is simplified through modular design, the problem of air leakage when the existing membrane retention is not sealed and the filter membrane is replaced, achieving better sealing performance and replacement convenience.
Patent Information
- Application Number
- CN202421921508.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing membrane support structure is not sealed, causing air to enter through the gap, affecting the environmental monitoring results. When the filter membrane is frequently replaced, the sealing ring is easily extruded and air leakage occurs.
A sealed membrane retention is designed, including an upper membrane press, a lower membrane retention block, a membrane tray and an outer shell. The outer shell is covered outside the upper membrane press and the lower membrane retention block, ensuring sealing performance through breathable holes and sealing rings, and the filter membrane is replaced by disassembly of the upper membrane press and the lower membrane retention block.
It effectively avoids air entering through the gap, enhances the sealing performance of the membrane retention, and simplifies the filter membrane replacement process, avoids air leakage during the sealing ring when replacing it.
Smart Images
Figure CN222900559U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an environmental monitoring device, in particular to a sealed membrane holder. Background Art
[0002] When conducting environmental monitoring, during the process of introducing air through a sampling tube, large particles such as dust in the air need to be blocked by a filter membrane to prevent the large particles from entering the interior of the device and damaging the device. The membrane holder is a carrier for the filter membrane and is used to place the filter membrane.
[0003] In existing devices, the membrane holder only plays a supporting role to allow air to pass through the filter membrane smoothly, but the membrane holder itself is not airtight, and air will enter the membrane holder through gaps other than the sampling port. Such a membrane holder structure can be placed outdoors, but if placed indoors, it will suck indoor air into the membrane holder and then into the filter membrane, affecting the monitoring results.
[0004] When the membrane holder needs to be sealed, only a sealing ring can be sleeved on the side of the membrane holder, and the sealing ring is squeezed by tightening the upper and lower parts of the membrane holder to achieve the sealing purpose. However, this method has an assembly problem when the filter membrane needs to be replaced frequently. When the upper and lower parts of the membrane holder are squeezed against each other, the sealing ring will be extruded, resulting in air leakage. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a sealed membrane holder with better sealing performance and more convenient filter membrane replacement.
[0006] To achieve the above purpose, the utility model provides a sealed membrane holder, which includes an upper membrane pressing block, a lower membrane holder block, a membrane tray, and an outer shell. The membrane tray is provided with air holes, and the filter membrane is placed inside the membrane tray. The two ends of the upper membrane pressing block are respectively a first end and a second end, and the two ends of the lower membrane pressing block are respectively a third end and a fourth end. The first end is an air inlet, and the fourth end is an air outlet. The air inlet is used to connect an air inlet pipe, and the air outlet is used to connect an air outlet pipe. The second end is connected to the third end. The membrane tray is clamped between the second end and the third end. The outer shell is sleeved outside the upper membrane pressing block and the lower membrane holder block, and the first end and the fourth end extend out of the outer shell.
[0007] Further, the third end is provided with a first annular boss and a second annular boss. The first annular boss is located outside the second annular boss. The second annular boss axially protrudes outside the first annular boss. The second end is provided with a connecting ring. The second annular boss extends into the connecting ring, and a space for accommodating the membrane tray is formed between the second annular boss and the connecting ring. The outer shell is sleeved on the upper membrane pressing block and the lower membrane holder block and is connected to the first annular boss.
[0008] Further, the outer casing is a lock nut, and the outer casing is threadedly connected to the first annular boss.
[0009] Further, it further includes a membrane pressing ring. The membrane tray is a cylindrical body. The outer wall of the membrane tray contacts the inner wall of the connecting ring. The bottom surface of the membrane tray is used for placing the filter membrane. The bottom surface of the membrane tray is provided with the ventilation holes. The membrane pressing ring is used to press above the filter membrane, and the outer wall of the membrane pressing ring contacts the inner side of the side wall of the membrane tray.
[0010] Further, a first groove is provided on the inner wall of the membrane tray, and the membrane pressing ring is arranged in the first groove.
[0011] Further, one end of the first groove away from the bottom surface of the membrane tray is provided with an inclined surface.
[0012] Further, the membrane pressing ring is provided with a circumferential break, and the membrane pressing ring is provided with a plurality of through holes extending radially.
[0013] Further, a second groove is provided on the outer wall of the membrane tray.
[0014] Further, sealing rings are respectively arranged between the bottom surface of the membrane tray and the second annular boss, and between the side wall of the membrane tray and the end of the second end.
[0015] Further, it further includes a ferrule and a nut. The inner wall of the air inlet is provided with a first inclined surface, the outer wall of the ferrule is provided with a second inclined surface. The ferrule is arranged in the air inlet. The ferrule is used to sleeve on the inlet pipe. The second inclined surface contacts the first inclined surface. The nut is sleeved outside the air inlet and the ferrule, and the nut is threadedly connected to the air inlet.
[0016] The sealed membrane tray of the present utility model has at least the following beneficial effects:
[0017] For the sealed membrane tray of the present utility model, since it includes an outer casing which is sleeved outside the upper membrane pressing block and the lower membrane supporting block, it avoids air from entering the membrane tray and then into the sampling tube through the gaps other than the sample inlet, enhancing the sealing performance of the membrane tray. And since the filter membrane is placed in the membrane tray and the membrane tray is clamped between the second end of the upper membrane pressing block and the third end of the lower membrane supporting block, the filter membrane can be replaced by disassembling the upper membrane pressing block and the lower membrane supporting block, making it more convenient to replace the filter membrane during use.
[0018] The sealed membrane tray of the present utility model will be specifically described below with reference to the drawings. Description of the Drawings
[0019] Figure 1 It is a sectional view of the sealed membrane tray of the present utility model;
[0020] Figure 2 It is a top view structural schematic diagram of the membrane tray in the sealed membrane support of the present utility model;
[0021] Figure 3 It is a side view sectional structural schematic diagram of the membrane pressing ring in the sealed membrane support of the present utility model;
[0022] Figure 4 It is a top view sectional structural schematic diagram of the membrane pressing ring in the sealed membrane support of the present utility model. Specific embodiments
[0023] As Figure 1 shown, a sealed membrane support of the present utility model includes an upper membrane pressing block 11, a lower membrane support block 12, a membrane tray 13, and an outer shell 14. The membrane tray 13 is provided with air permeation holes, and the membrane tray 13 is used to place a filter membrane 19. The two ends of the upper membrane pressing block 11 are respectively a first end and a second end, and the two ends of the lower membrane pressing block 12 are respectively a third end and a fourth end. The first end is an air inlet, and the fourth end is an air outlet. The air inlet is used to connect an inlet pipe, and the air outlet is used to connect an outlet pipe. The second end is connected to the third end. The membrane tray 13 is clamped between the second end and the third end. The outer shell 14 is sleeved outside the upper membrane pressing block 11 and the lower membrane support block 12, and the first end and the fourth end extend outside the outer shell 14. External air enters the upper membrane pressing block 11 through the air inlet, is filtered by the filter membrane 19, passes through the air permeation holes on the membrane tray 13, and then enters the sampling tube through the air outlet. For the sealed membrane support of the present utility model, since it includes the outer shell 14 which is sleeved outside the upper membrane pressing block 11 and the lower membrane support block 12, it avoids air from entering the membrane support and then entering the sampling tube through the gaps other than the sampling port, enhancing the sealing performance of the membrane support. And because the filter membrane 19 is placed in the membrane tray 13, and the membrane tray 13 is clamped between the second end of the upper membrane pressing block 11 and the third end of the lower membrane support block 12, the filter membrane can be replaced by disassembling the upper membrane pressing block 11 and the lower membrane support block 12, making it more convenient to replace the filter membrane during use.
[0024] Optionally, the third end is provided with a first annular boss 121 and a second annular boss 122. The first annular boss 121 is located outside the second annular boss 122. The second annular boss 122 protrudes axially outside the first annular boss 121. The second end is provided with a connecting ring 111. The second annular boss 122 extends into the connecting ring 111, and a receiving space for accommodating the membrane tray 13 is formed between the second annular boss 122 and the connecting ring 111. The outer shell 14 is sleeved on the upper membrane pressing block 11 and the lower membrane support block 12 and is connected to the first annular boss 121. Since the second annular boss 122 extends into the connecting ring 111 and the outer shell 14 is sleeved on the upper membrane pressing block 11 and the lower membrane support block 12 and is connected to the first annular boss 121, it makes it more convenient to disassemble the upper membrane pressing block 11 and the lower membrane support block 12 and more convenient to replace the filter membrane.
[0025] Optionally, the outer housing 14 is a lock nut, and the outer housing 14 is threadedly connected to the first annular boss 121 to prevent external air from entering the filter membrane 19 through the gap between the upper membrane pressing block 11 and the lower membrane supporting block 12, further improving the sealing performance of the sealed membrane support of the present utility model.
[0026] Optionally, as Figure 2 , Figure 3 , Figure 4 shown, it further includes a membrane pressing ring 18. The membrane tray 13 is a cylindrical body. The outer wall of the membrane tray 13 contacts the inner wall of the connecting ring 111. The filter membrane 19 is placed on the bottom surface of the membrane tray 13. The bottom surface of the membrane tray 13 is provided with air permeable holes. The membrane pressing ring 18 is used to press above the filter membrane 19, and the outer wall of the membrane pressing ring 18 contacts the inner side of the side wall of the membrane tray 13. Since the membrane tray 13 is a cylindrical body and the membrane tray 13 is an integral structure, and the outer wall of the membrane tray 13 contacts the inner wall of the connecting ring 111, it further prevents external air from entering the filter membrane 19 through the gap between the upper membrane pressing block 11 and the lower membrane supporting block 12, improving the sealing performance of the sealed membrane support of the present utility model.
[0027] Optionally, a first groove 131 is provided on the inner wall of the membrane tray 13, and the membrane pressing ring 18 is arranged in the first groove 131. The membrane pressing ring 18 and the first groove 131 are of matching sizes, so that the membrane pressing ring 18 can press the filter membrane 19 tightly to prevent the filter membrane 19 from moving.
[0028] Optionally, one end of the first groove 131 away from the bottom surface of the membrane tray 13 is provided with an inclined surface, which facilitates putting the membrane pressing ring 18 into the membrane tray 13.
[0029] Optionally, the membrane pressing ring 18 is provided with a circumferential break 181, which facilitates inserting the membrane pressing ring 18 into the membrane tray 13. The membrane pressing ring 18 is provided with a plurality of through holes 182 extending radially, which facilitates using an instrument to hook in the through holes 182 to take out the membrane pressing ring 18, making it more convenient to replace the filter membrane.
[0030] Optionally, a second groove 132 is provided on the outer wall of the membrane tray 13, which facilitates taking the membrane tray 13 and reduces the weight of the membrane tray 13.
[0031] Optionally, sealing rings 15 and 16 are respectively provided between the bottom surface of the membrane tray 13 and the second annular boss 122, and between the side wall of the membrane tray 13 and the second end end portion, further preventing external air from entering the filter membrane 19 through the gap between the upper membrane pressing block 11 and the lower membrane supporting block 12, improving the sealing performance of the sealed membrane support of the present utility model.
[0032] Optionally, the sealed membrane holder of the present utility model further includes a ferrule 171 and a nut 172. The inner wall of the air inlet is provided with a first inclined surface, and the outer wall of the ferrule 171 is provided with a second inclined surface. The ferrule 171 is arranged in the air inlet and is used to sleeve on the intake pipe. The second inclined surface contacts the first inclined surface. The nut 172 is sleeved outside the air inlet and the ferrule 171, and the nut 172 is threadedly connected to the air inlet. By tightening the nut 172, the second inclined surface of the ferrule 171 is pressed inward to tightly compress the intake pipe, achieving the purpose of sealing. The ferrule 171 is made of polytetrafluoroethylene. The air outlet is provided with a ferrule and a nut with the same structure.
[0033] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present utility model.
Claims
1. A sealed membrane support, characterized in that: It comprises an upper membrane pressing block (11), a lower membrane supporting block (12), a membrane tray (13), and an outer shell (14); the membrane tray (13) is provided with air holes; the membrane tray (13) is used to place a filter membrane (19); the two ends of the upper membrane pressing block (11) are respectively a first end and a second end; the two ends of the lower membrane supporting block (12) are respectively a third end and a fourth end; the first end is an air inlet and the fourth end is an air outlet; the air inlet is used to connect to an air inlet pipe; the air outlet is used to connect to an air outlet pipe; the second end is connected to the third end; the membrane tray (13) is clamped between the second end and the third end; the outer shell (14) is sleeved over the upper membrane pressing block (11) and the lower membrane supporting block (12); the first end and the fourth end extend out of the outer shell (14).
2. The sealed membrane support according to claim 1, characterized in that: The third end is provided with a first annular boss (121) and a second annular boss (122), the first annular boss (121) is located outside the second annular boss (122), the second annular boss (122) protrudes axially outside the first annular boss (121), the second end is provided with a connecting ring (111), the second annular boss (122) extends into the connecting ring (111), and a space for accommodating the membrane tray (13) is formed between the second annular boss (122) and the connecting ring (111), and the outer shell (14) is sleeved on the upper membrane pressing block (11) and the lower membrane supporting block (12) and is connected to the first annular boss (121).
3. The sealed membrane support according to claim 2, characterized in that: The outer shell (14) is a locking nut, and the outer shell (14) is threadedly connected to the first annular boss (121).
4. The sealed membrane support according to claim 2, characterized in that: It also includes a membrane pressure ring (18), the membrane tray (13) is a cylindrical body, the outer wall of the membrane tray (13) is in contact with the inner wall of the connecting ring (111), the bottom surface of the membrane tray (13) is used to place the filter membrane (19), the bottom surface of the membrane tray (13) is provided with the air vents, the membrane pressure ring (18) is used to press on top of the filter membrane (19), and the outer wall of the membrane pressure ring (18) is in contact with the inner side of the side wall of the membrane tray (13).
5. The sealed membrane support according to claim 4, characterized in that: The inner wall of the membrane tray (13) is provided with a first groove (131), and the membrane pressure ring (18) is arranged in the first groove (131).
6. The sealed membrane support according to claim 5, characterized in that: An end of the first groove (131) away from the bottom surface of the film tray (13) is provided with an inclined surface.
7. The sealed membrane support according to claim 4, characterized in that: The membrane pressure ring (18) is provided with a fracture (181) along the circumferential direction, and the membrane pressure ring (18) is provided with a plurality of through holes (182) extending along the radial direction.
8. The sealed membrane support according to claim 5, characterized in that: The outer wall of the film tray (13) is provided with a second groove (132).
9. The sealed membrane support according to claim 8, characterized in that: Sealing rings (15, 16) are respectively arranged between the bottom surface of the membrane tray (13) and the second annular boss (122), and between the side wall of the membrane tray (13) and the second end portion.
10. The sealed membrane support according to any one of claims 1 to 9, characterized in that: It also includes a ferrule (171) and a nut (172), wherein the inner wall of the air inlet is provided with a first inclined surface, and the outer wall of the ferrule (171) is provided with a second inclined surface, the ferrule (171) is arranged in the air inlet, the ferrule (171) is used to be sleeved on the air inlet pipe, the second inclined surface is in contact with the first inclined surface, the nut (172) is sleeved outside the air inlet and the ferrule (171), and the nut (172) is threadedly connected to the air inlet.