Sealing structure of multi-layer composite flame-retardant plastic filter shell

Abstract

The sealing structure comprises a plastic top shell and a plastic bottom shell, the plastic top shell and the plastic bottom shell are in threaded connection, a U-shaped groove is formed in the middle of the bottom end of the plastic top shell, an inner thread is formed in the position, corresponding to the inner outer ring of the U-shaped groove, of the plastic top shell, and the inner thread is in threaded connection with the U-shaped groove. The top end of the plastic bottom shell is inserted into the U-shaped groove in the bottom end of the plastic top shell, due to the fact that the top end of the plastic bottom shell is located in the U-shaped groove, the U-shaped groove can wrap the top end of the plastic bottom shell and is used for positioning and wrapping the top end of the plastic bottom shell, deformation damage of the plastic top shell and the plastic bottom shell cannot occur, and the fixing ring wraps the plastic top shell and the plastic bottom shell. And the insertion rods are inserted into the insertion holes, and the relative positions of the plastic top shell and the plastic bottom shell can be positioned through the upper insertion rod and the lower insertion rod on the fixing ring, so that relative dislocation rotation between the plastic top shell and the plastic bottom shell is prevented, and the sealing effect between the plastic top shell and the plastic bottom shell is improved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a sealing structure for a multi-layer composite flame-retardant plastic filter housing. Background Technology

[0002] In water treatment technology, ultrafiltration membranes are widely used to separate substances in water for filtration and purification. In drinking water purification, they remove bacteria, viruses, and pollutants, meeting the requirements for direct drinking water quality. In industrial wastewater treatment, they separate bacteria, colloids, and large organic molecules from industrial wastewater. Some products are used for resource recovery (such as glycerol and silver). In food and beverage processing, they are used for clarifying fruit juices and wines, and in dairy processing (such as whey protein recovery), ensuring product purity. In pharmaceuticals and biopharmaceuticals, they achieve the concentration and purification of fermentation broths and biological products while retaining active ingredients. In seawater desalination, they serve as a pretreatment or terminal treatment for reverse osmosis, removing salt and microorganisms from seawater. With its precise filtration capabilities, ultrafiltration membranes play a vital role in ensuring drinking water safety and promoting sustainable industrial development.

[0003] During ultrafiltration membrane production, the ultrafiltration membrane is installed inside a plastic filter housing. The plastic filter housing supports the ultrafiltration membrane and guides the water flow. To facilitate installation, existing plastic filter housings are mostly multi-segment structures with internal and external threads. Assembly of the plastic filter housing is achieved through the connection between these threads. Most existing plastic filter housings are cylindrical, with the internal and external threads located directly at the ends. The connection point between two plastic filter housings is the threaded location. To ensure a seal, a sealant is applied to the plastic filter housing. Sealing plastic tape is wrapped around the threaded parts of the filter housing to seal the threads. However, the sealing plastic tape can wear down, causing water to leak directly from the threaded joint between the two filter housings. Furthermore, the connection between the two filter housings is prone to wear and breakage during tightening and normal use, resulting in water leakage directly from the threaded joint and poor sealing performance. In addition, since the filter housings are connected by threads, misalignment can occur between multiple filter housing sections, which can also lead to leakage between the filter housings. Utility Model Content

[0004] The purpose of this invention is to provide a sealing structure for a multi-layer composite flame-retardant plastic filter shell to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a multi-layer composite flame-retardant plastic filter shell, comprising a plastic top shell and a plastic bottom shell, wherein the plastic top shell and the plastic bottom shell are threadedly connected, a U-shaped groove is formed in the middle of the bottom end of the plastic top shell, an internal thread is formed on the outer ring of the plastic top shell corresponding to the inner edge of the U-shaped groove, an external thread is formed on the outer ring of the top end of the plastic bottom shell, the top end of the plastic bottom shell is located inside the U-shaped groove, the internal thread and the external thread are threadedly connected, a fixing ring is installed on the outer ring of the plastic top shell and the plastic bottom shell, and a plug rod is symmetrically fixedly installed in the middle of the fixing ring, and a plug hole is formed on the outer ring of both the plastic top shell and the plastic bottom shell, wherein the plug rod is slidably inserted into the plug hole.

[0006] As a further preferred embodiment of this technical solution, a protruding ring is integrally provided at the bottom end of the plastic top shell corresponding to the inner ring position of the U-shaped groove, and the bottom end of the protruding ring is set lower than the top end of the plastic bottom shell.

[0007] As a further preferred embodiment of this technical solution, a groove is provided on the inner wall of the top of the plastic bottom shell, and a sealing rubber ring is installed inside the groove.

[0008] As a further preferred embodiment of this technical solution, the bottom end of the plastic top shell is provided with an extrusion groove corresponding to the bottom outer ring of the protruding ring, and the sealing rubber ring protrudes from the inside of the groove and is disposed inside the extrusion groove.

[0009] As a further preferred embodiment of this technical solution, a sealing rubber gasket is fixedly installed at the top of the plastic bottom shell, and the sealing rubber gasket is filled inside the top of the U-shaped groove.

[0010] As a further preferred embodiment of this technical solution, the fixing ring includes two semicircular rings, the insertion rods are symmetrically arranged on the inner wall of the middle part of the semicircular rings, and connecting seats are provided at both ends of the semicircular rings. Fastening bolts are installed between the corresponding connecting seats on the two semicircular rings.

[0011] This utility model provides a sealing structure for a multi-layer composite flame-retardant plastic filter shell, which has the following beneficial effects:

[0012] (1) This utility model installs a sealing rubber ring inside the groove on the inner wall of the top of the plastic bottom shell, places a sealing rubber pad on the top of the plastic bottom shell, inserts the top of the plastic bottom shell into the U-shaped groove at the bottom of the plastic top shell, and connects the plastic top shell with the plastic bottom shell through the internal thread and the external thread. This is used to assemble the plastic top shell and the plastic bottom shell. Since the top of the plastic bottom shell is inside the U-shaped groove, the U-shaped groove can wrap around the top of the plastic bottom shell, which is used to position and wrap the top of the plastic bottom shell. There will be no deformation damage to the plastic top shell and the plastic bottom shell. At the same time, the protruding ring is in the inner ring of the plastic bottom shell, and the outer ring of the protruding ring can be sealed with the inner ring of the plastic bottom shell which does not coincide with the external thread. There will be no cracking of the plastic top shell and the plastic bottom shell under the extrusion state when they are in the internal and external thread positions.

[0013] (2) This utility model wraps two semi-circular rings around a plastic top shell and a plastic bottom shell, inserts a plug rod into the plug hole, and fixes the connecting seat on the two semi-circular rings with fastening bolts. The relative position of the plastic top shell and the plastic bottom shell can be positioned by the upper and lower plug rods on the semi-circular rings, preventing relative misalignment and rotation between the plastic top shell and the plastic bottom shell, and improving the sealing effect between the plastic top shell and the plastic bottom shell. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a partial structural schematic diagram of the present invention;

[0018] In the diagram: 1. Plastic top shell; 2. Plastic bottom shell; 3. U-shaped groove; 4. Internal thread; 5. External thread; 6. Fastening bolt; 7. Protruding ring; 8. Groove; 9. Sealing rubber ring; 10. Extrusion groove; 11. Sealing rubber gasket; 12. Semicircular ring; 13. Connecting seat; 14. Fixing ring; 15. Insert rod; 16. Insertion hole. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] This utility model provides a technical solution: such as Figures 1 to 4As shown in this embodiment, a sealing structure for a multi-layer composite flame-retardant plastic filter shell includes a plastic top shell 1 and a plastic bottom shell 2. The plastic top shell 1 and the plastic bottom shell 2 are threaded together. A U-shaped groove 3 is formed in the middle of the bottom end of the plastic top shell 1. An internal thread 4 is formed on the outer ring of the plastic top shell 1 corresponding to the inner edge of the U-shaped groove 3. An external thread 5 is formed on the outer ring of the top end of the plastic bottom shell 2. The top end of the plastic bottom shell 2 is located inside the U-shaped groove 3. The internal thread 4 and the external thread 5 are threaded together. A fixing ring 14 is installed on the outer ring of the plastic top shell 1 and the plastic bottom shell 2. Insertion rods 15 are symmetrically fixedly installed in the middle of the fixing ring 14. Insertion holes 16 are formed on the outer ring of both the plastic top shell 1 and the plastic bottom shell 2. The insertion rods 15 are slidably inserted into the insertion holes 16 to hold the plastic bottom shell 2 in place. The top end of the rod is inserted into the U-shaped groove 3 at the bottom of the plastic top shell 1, and is threadedly connected to the external thread 5 on the plastic bottom shell 2 through the internal thread 4 on the plastic top shell 1. This is used for assembling the plastic top shell 1 and the plastic bottom shell 2. Since the top end of the plastic bottom shell 2 is inside the U-shaped groove 3, the U-shaped groove 3 can wrap around the top end of the plastic bottom shell 2, which is used for positioning and wrapping the top end of the plastic bottom shell 2, and there will be no deformation or damage to the plastic top shell 1 and the plastic bottom shell 2. The fixing ring 14 wraps around the plastic top shell 1 and the plastic bottom shell 2, and the insert rod 15 is inserted into the insertion hole 16. The upper and lower insert rods 15 on the fixing ring 14 can be used to position the relative position of the plastic top shell 1 and the plastic bottom shell 2, preventing relative misalignment and rotation between the plastic top shell 1 and the plastic bottom shell 2, and improving the sealing effect between the plastic top shell 1 and the plastic bottom shell 2.

[0021] like Figures 1 to 4 As shown, a protruding ring 7 is integrally provided at the bottom end of the plastic top shell 1 corresponding to the inner ring position of the U-shaped groove 3, and the bottom end of the protruding ring 7 is lower than the top end of the plastic bottom shell 2.

[0022] When the plastic top shell 1 and the plastic bottom shell 2 are assembled by threads, the protruding ring 7 is located in the inner ring of the plastic bottom shell 2. The outer ring of the protruding ring 7 can be sealed with the inner ring of the plastic bottom shell 2, which does not coincide with the external thread 5. This prevents the plastic top shell 1 and the plastic bottom shell 2 from cracking under compression at the positions of the internal thread 4 and the external thread 5.

[0023] like Figures 1 to 4 As shown, a groove 8 is provided on the inner wall of the top of the plastic bottom shell 2, and a sealing rubber ring 9 is installed inside the groove 8.

[0024] When the sealing rubber ring 9 is installed inside the groove 8 on the inner wall of the top of the plastic bottom shell 2, and the plastic top shell 1 and the plastic bottom shell 2 are assembled by threads, the sealing rubber ring 9 can seal between the protruding ring 7 and the inner ring of the plastic bottom shell 2, thereby improving the sealing effect between the plastic top shell 1 and the plastic bottom shell 2.

[0025] like Figures 1 to 4 As shown, the bottom end of the plastic top shell 1 is provided with an extrusion groove 10 corresponding to the bottom outer ring of the protruding ring 7, and the sealing rubber ring 9 protrudes from the inside of the groove 8 and is disposed inside the extrusion groove 10.

[0026] When the plastic top shell 1 and the plastic bottom shell 2 are threaded together, the sealing rubber ring 9 can be squeezed and sealed with the extrusion groove 10, further improving the sealing effect between the plastic top shell 1 and the plastic bottom shell 2.

[0027] like Figures 1 to 4 As shown, a sealing rubber gasket 11 is fixedly installed at the top of the plastic bottom shell 2, and the sealing rubber gasket 11 is filled inside the top of the U-shaped groove 3.

[0028] When the sealing rubber gasket 11 is placed on the top of the plastic bottom shell 2 and the top of the plastic bottom shell 2 is inserted into the U-shaped groove 3 at the bottom of the plastic top shell 1, the sealing rubber gasket 11 can seal the internal space of the U-shaped groove 3, thus achieving a seal when the top of the plastic bottom shell 2 is inserted into the U-shaped groove 3 at the bottom of the plastic top shell 1.

[0029] like Figures 1 to 4 As shown, the fixing ring 14 includes a semi-circular ring 12, there are two semi-circular rings 12, the insertion rod 15 is symmetrically arranged on the inner wall of the middle part of the semi-circular ring 12, and a connecting seat 13 is provided at both ends of the semi-circular ring 12. Fastening bolts 6 are installed between the corresponding connecting seats 13 on the two semi-circular rings 12.

[0030] Two semicircular rings 12 are wrapped around the plastic top shell 1 and the plastic bottom shell 2, and the insertion rod 15 is inserted into the insertion hole 16. The connecting seat 13 on the two semicircular rings 12 is fixed by the fastening bolt 6, which facilitates the assembly and fixation between the fixing ring 14 and the plastic top shell 1 and the plastic bottom shell 2.

[0031] This utility model provides a sealing structure for a multi-layer composite flame-retardant plastic filter shell, and its specific working principle is as follows:

[0032] When the device is in use, the sealing rubber ring 9 is installed inside the groove 8 on the inner wall of the top of the plastic bottom shell 2, and the sealing rubber pad 11 is placed on the top of the plastic bottom shell 2. The top of the plastic bottom shell 2 is inserted into the U-shaped groove 3 at the bottom of the plastic top shell 1, and the internal thread 4 on the plastic top shell 1 is threaded to the external thread 5 on the plastic bottom shell 2 for assembly. Since the top of the plastic bottom shell 2 is inside the U-shaped groove 3, the U-shaped groove 3 can wrap around the top of the plastic bottom shell 2 for positioning and wrapping the top of the plastic bottom shell 2, so that the plastic top shell 1 and the plastic bottom shell 2 will not be deformed or damaged. At the same time, the protruding ring 7 is in the inner ring of the plastic bottom shell 2, and the outer ring of the protruding ring 7 can be sealed with the inner ring of the plastic bottom shell 2 that does not coincide with the external thread 5, so that the plastic top shell 1 and the plastic bottom shell 2 will not be crushed under the pressure at the position of the internal thread 4 and the external thread 5.

[0033] Two semicircular rings 12 are wrapped around the plastic top shell 1 and the plastic bottom shell 2, and the insert rod 15 is inserted into the insertion hole 16. The connecting seat 13 on the two semicircular rings 12 is fixed by the fastening bolt 6. The relative position of the plastic top shell 1 and the plastic bottom shell 2 can be positioned by the upper and lower insert rods 15 on the semicircular rings 12, so as to prevent relative misalignment and rotation between the plastic top shell 1 and the plastic bottom shell 2, and improve the sealing effect between the plastic top shell 1 and the plastic bottom shell 2.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a multi-layer composite flame-retardant plastic filter shell, comprising a plastic top shell (1) and a plastic bottom shell (2), characterized in that: The plastic top shell (1) and the plastic bottom shell (2) are connected by threads. The bottom of the plastic top shell (1) has a U-shaped groove (3) in the middle. The plastic top shell (1) has an internal thread (4) on the outer ring of the U-shaped groove (3). The top of the plastic bottom shell (2) has an external thread (5) on the outer ring of the top. The top of the plastic bottom shell (2) is located inside the U-shaped groove (3). The internal thread (4) and the external thread (5) are connected by threads. The outer rings of the plastic top shell (1) and the plastic bottom shell (2) are equipped with fixing rings (14). The middle of the fixing rings (14) is symmetrically fixed with insert rods (15). The outer rings of the plastic top shell (1) and the plastic bottom shell (2) are both provided with insertion holes (16). The insert rods (15) are slidably inserted into the insertion holes (16).

2. The sealing structure of the multilayer composite flame-retardant plastic filter shell according to claim 1, characterized in that: The bottom end of the plastic top shell (1) is integrally provided with a protruding ring (7) corresponding to the inner ring position of the U-shaped groove (3), and the bottom end of the protruding ring (7) is set lower than the top end of the plastic bottom shell (2).

3. The sealing structure of a multi-layer composite flame-retardant plastic filter shell according to claim 2, characterized in that: The top inner wall of the plastic bottom shell (2) is provided with a groove (8), and a sealing rubber ring (9) is installed inside the groove (8).

4. The sealing structure of a multi-layer composite flame-retardant plastic filter shell according to claim 3, characterized in that: The bottom end of the plastic top shell (1) is provided with an extrusion groove (10) corresponding to the bottom outer ring of the protruding ring (7), and the sealing rubber ring (9) protrudes from the inside of the groove (8) and is provided inside the extrusion groove (10).

5. The sealing structure of a multi-layer composite flame-retardant plastic filter shell according to claim 4, characterized in that: A sealing rubber gasket (11) is fixedly installed at the top of the plastic bottom shell (2), and the sealing rubber gasket (11) is filled inside the top of the U-shaped groove (3).

6. The sealing structure of a multi-layer composite flame-retardant plastic filter shell according to claim 1, characterized in that: The fixing ring (14) includes a semi-circular ring (12), there are two semi-circular rings (12), the insertion rod (15) is symmetrically arranged on the inner wall of the middle part of the semi-circular ring (12), and a connecting seat (13) is provided at both ends of the semi-circular ring (12). Fastening bolts (6) are installed between the corresponding connecting seats (13) on the two semi-circular rings (12).

Images