Pre-filter with filter bottle anti-backout structure

Abstract

The utility model provides a kind of front filter with filter bottle anti-loosening structure, including lid and bottle body. The lower end of lid is provided with recess and internal thread, and the upper end of bottle body is provided with external thread, and the both are connected by thread;It also includes a sealing ring, which is located between the bottle body and the lid to ensure sealing performance. The circumferential wall of the lid is provided with a connecting hole, and a fixed rod is arranged in the hole. When the fixed rod is axially fixed, it can closely cooperate with the external thread to prevent the bottle body from rotating relative to the lid. A sink is provided on the external thread thread, and the fixed rod is inserted into the sink to enhance the anti-loosening effect. The sink is designed with a slope to facilitate fine adjustment when installation is not in place. The upper end of the bottle body is provided with an annular groove, and the sealing ring is embedded therein. The rib design improves the sealing stability. The utility model solves the problem of thread loosening and sealing failure caused by water hammer impact, and improves the product reliability and operation convenience.

Description

Technical Field

[0001] This utility model relates to a pre-filter with a filter bottle anti-loosening structure. Background Technology

[0002] In the field of modern water treatment equipment, pre-filters, as important water pretreatment devices, are widely used in household and industrial environments. High-precision pre-filters, using PP cotton, ACF, and other filter media as their core, are highly favored due to their efficient filtration performance. However, the structural design of these filters still faces technical challenges that urgently need to be addressed. Currently, most pre-filters on the market use a threaded connection between the top cover and the filter bottle, supplemented by an axial seal. This design is susceptible to water hammer impacts during long-term use, leading to loosening of the threads, resulting in seal failure and leakage. In severe cases, it can even cause flooding, causing economic losses and safety hazards for users. To address this issue, some products attempt to reduce the risk of loosening by adding radial seals, but this method is not a permanent solution and still carries certain risks. Summary of the Invention

[0003] This utility model discloses a pre-filter with a filter bottle anti-loosening structure. After adding the anti-loosening structure, the filter bottle and the main body of the pre-filter are structurally prevented from rotating, which solves the problem of water leakage caused by the filter bottle slowly loosening after long-term water hammer impact.

[0004] The present invention adopts the following solution:

[0005] A pre-filter with an anti-loosening structure for the filter bottle includes a cap and a bottle. The lower end of the cap has a recess with an internal thread on its inner circumference, and the upper end of the bottle has an external thread on its outer circumference. The cap and bottle can be screwed together. The filter also includes a sealing ring that fits tightly against the upper surface of the bottle and the lower surface of the cap located on the inner circumference of the recess. A connecting hole is provided on the peripheral sidewall of the cap, connecting the outer circumference of the cap to the recess. A fixing rod is disposed within the connecting hole, allowing for axial movement and fixation within the connecting hole. When the fixing rod is axially fixed relative to the connecting hole, one end of the fixing rod fits tightly against the external thread to prevent the bottle from rotating relative to the cap.

[0006] In this embodiment of the utility model, a recessed groove is formed on the thread of the external thread, and when the fixing rod is axially fixed relative to the connecting hole, the other end of the fixing rod can be inserted into the recessed groove.

[0007] In this embodiment of the utility model, one end of the periphery of the settling trough is provided with an inclined surface. When one end of the fixing rod moves toward the settling trough, it can cooperate with the inclined surface to drive the bottle body to rotate relative to the cap body.

[0008] In this embodiment of the present invention, one end of the connecting hole is configured to connect with the root of the internal thread, so that one end of the fixing rod can act on the thread of the external thread.

[0009] In this embodiment of the invention, the upper end face of the bottle is provided with an annular groove, and the sealing ring is disposed in the annular groove.

[0010] In this embodiment of the utility model, the lower end of the cap located on the inner periphery of the recessed portion has a rib protruding downwards. When the bottle is screwed into the cap, the rib can be located on the inner periphery of the side wall of the bottle, and the sealing ring is located between the rib and the internal thread.

[0011] In this embodiment of the utility model, a fixing seat that can be adapted to the connecting hole is arranged on the outer periphery of the cover body. The fixing seat is provided with a plug hole. The fixing rod moves and rotates axially within the plug hole so that the fixing rod is inserted into the connecting hole and plug hole to achieve axial fixation.

[0012] In this embodiment of the invention, the fixing rod is provided with a protruding post, and the fixing seat is provided with a first enlarged hole portion that can communicate with the insertion hole. The protruding post can move axially in the first enlarged hole portion. The inner peripheral wall of the fixing seat is provided with a second enlarged hole portion that can communicate with the insertion hole. The first enlarged hole portion and the second enlarged hole portion are arranged on the fixing seat from the outside to the inside. The protruding post can rotate within the second enlarged hole portion so that the fixing rod no longer moves axially relative to the fixing seat.

[0013] In this embodiment of the invention, when the protruding post can rotate within the second enlarged hole, the fixing rod no longer moves axially relative to the connecting hole, and one end of the fixing rod can be tightly engaged with the external thread to prevent the bottle body from rotating relative to the cap body.

[0014] In this embodiment of the utility model, the connecting hole is a threaded hole, and the fixing rod is a screw.

[0015] This utility model provides a pre-filter with an anti-loosening structure for the filter bottle, which has the following advantages: First, the addition of an anti-loosening structure, through the cooperation of the fixing rod and the external thread, achieves an anti-rotation function between the bottle body and the cap body, effectively preventing the thread from loosening due to water hammer impact. Second, the design of the sealing ring, annular groove, and ribs enhances the sealing performance, avoiding the risk of leakage due to seal failure. Third, the structure is simple, easy to process and assemble, and has good operational convenience, facilitating user installation and maintenance. Finally, it is applicable to various high-precision pre-filters, with broad applicability and market prospects.

[0016] In particular, the anti-loosening structure of this invention, through the cooperation of the fixing rod and the settling groove, can achieve a stable connection under high-intensity water hammer impact, avoiding the risk of loosening due to long-term vibration of traditional threaded connections. In addition, the inclined surface design inside the settling groove allows the fixing rod to automatically adjust for any misalignment of the bottle during insertion, further enhancing the sealing effect. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the bottle body in an embodiment of this utility model.

[0019] Figure 2 This is an exploded view of Embodiment 1 of this utility model.

[0020] Figure 3 This is a partial cross-sectional view of Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the fixing base in Embodiment 1 of this utility model. Figure 1 .

[0022] Figure 5 This is a schematic diagram of the fixing base in Embodiment 1 of this utility model. Figure 2 .

[0023] Figure 6 This is an exploded view of Embodiment 2 of this utility model.

[0024] Figure 7 This is a partial cross-sectional view of Embodiment 2 of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments.

[0026] Referring to the accompanying drawings, this pre-filter mainly includes a cap 1, a bottle 2, a sealing ring 6, a fixing rod 8, and related connecting and fixing structures. Its design aims to solve the leakage problem caused by loose threads and seal failure in traditional pre-filters during long-term use by optimizing the connection between the cap and the bottle and introducing an anti-loosening structure.

[0027] The lower end of the cap 1 has a recess 3, and the inner circumference of the recess 3 has an internal thread 4. The upper outer circumference of the bottle 2 has an external thread 5. The cap 1 and the bottle 2 are tightly connected through the engagement of the internal thread 4 and the external thread 5. This threaded connection not only facilitates assembly but also ensures the initial sealing performance between the cap 1 and the bottle 2. To further improve the sealing effect, a sealing ring 6 is provided between the upper end face of the bottle 2 and the lower end face of the cap 1, using an end-face sealing method. The upper end face of the bottle 2 has an annular groove 11, and the sealing ring 6 is embedded in the annular groove 11 to ensure stable positioning of the sealing ring 6. At the same time, the lower end face of the cap 1, located on the inner circumference of the recess 3, has a downward-protruding rib 12, which serves as a guide during pre-installation. When the bottle 2 is screwed into the cap 1, the rib 12 is located on the inner circumference of the side wall of the bottle 2, and the sealing ring 6 is located between the rib 12 and the internal thread 4.

[0028] To address the issue of thread loosening caused by water hammer impact, this invention introduces an anti-loosening structure. A connecting hole 7 is provided on the side wall of the cap 1, connecting the outer periphery of the cap 1 and the recessed portion 3. A fixing rod 8 is disposed within the connecting hole 7. The fixing rod 8 can move axially (laterally in the figure) and be axially fixed within the connecting hole 7. Once axially fixed, it will not move further. When the fixing rod 8 is axially fixed relative to the connecting hole 7, one end of the fixing rod 8 can fit tightly against the external thread 5 of the bottle body 2, preventing the bottle body 2 from rotating relative to the cap 1, thus achieving the anti-loosening function. A recessed groove 9 is formed on the threads of the external thread 5 of the bottle body 2. When the fixing rod 8 is axially fixed relative to the connecting hole 7, the other end of the fixing rod 8 can be inserted into the recessed groove 9, further enhancing the anti-loosening effect. In addition, one end of the sink 9 is provided with a ramp 10. When one end of the fixing rod 8 moves toward the sink 9, it can cooperate with the ramp 10 to drive the bottle body 2 to rotate relative to the cap body 1, so that the bottle body, which was not screwed into place, rotates again relative to the cap body, ensuring that the sealing ring can achieve tight fit.

[0029] In Embodiment 1 of this utility model: To ensure the axial fixation reliability of the fixing rod 8, a fixing seat 13 adapted to the connecting hole 7 is arranged on the outer periphery of the cover 1. The fixing seat 13 is provided with a insertion hole 14, wherein the fixing seat can be fixed together with the cover by screw locking. The fixing rod 8 can move and rotate axially within the insertion hole 14. When the fixing rod 8 is inserted into the connecting hole 7 and the insertion hole 14, axial fixation can be achieved, ensuring that the fixing rod 8 will not loosen. A protruding post 15 is provided on the fixing rod 8, and a first enlarged hole portion 16 and a second enlarged hole portion 17 are provided on the fixing seat 13. The first enlarged hole portion 16 is connected to the insertion hole 14, and the second enlarged hole portion 17 is connected to the insertion hole 14 and is arranged on the fixing seat 13 from the outside to the inside. The protruding post 15 can move axially within the first enlarged hole portion 16 and rotate within the second enlarged hole portion 17, while the second enlarged hole portion is connected to the outer periphery of the cover. When the protruding post 15 rotates within the second enlarged hole 17, the fixing rod 8 no longer moves axially relative to the connecting hole 7. One end of the fixing rod 8 can fit tightly with the external thread 5, ensuring the anti-rotation effect between the bottle body 2 and the cap body 1. This design achieves reliable fixation of the fixing rod 8 through mechanical locking, avoiding loosening problems caused by vibration or external impact. In this embodiment, the fixing rod forms a key structure, which cannot rotate when not in position. It can only rotate when one end of the fixing rod is inserted into the sink.

[0030] In Embodiment 2 of this utility model, the connecting hole 7 can be a threaded hole, and the fixing rod 8 can be a screw, which facilitates processing and assembly. The fit between the threaded hole and the screw not only simplifies the assembly process but also improves the axial fixing reliability of the fixing rod 8. In practical applications, users only need to screw the fixing rod 8 into the connecting hole 7 to complete the assembly without additional tools, significantly improving operational convenience.

[0031] In practical use, the user first screws the bottle body 2 into the cap body 1, ensuring a tight fit between the internal thread 4 and the external thread 5. During this process, the sealing ring 6 is pressed between the upper end face of the bottle body 2 and the lower end face of the cap body 1, creating a preliminary sealing effect. Subsequently, the user inserts the fixing rod 8 into the connecting hole 7 and rotates it so that one end is inserted into the recess 9, where it fits tightly against the external thread. At this point, the protrusion 15 of the fixing rod 8 is located within the first enlarged hole 16 of the fixing seat 13. The user continues to rotate the fixing rod 8, causing the protrusion 15 to enter the second enlarged hole 17 and complete the locking. This process ensures the axial fixation of the fixing rod 8 through mechanical locking, preventing the bottle body 2 from rotating relative to the cap body 1, thus achieving the anti-loosening function.

[0032] In summary, this utility model solves the leakage problem caused by loose threads and seal failure in traditional pre-filters during long-term use by optimizing the connection method between the cap 1 and the bottle 2, and introducing an anti-loosening structure and a sealing ring 6 positioning design. Its innovation lies in achieving an anti-rotation function between the bottle 2 and the cap 1 through the cooperation of the fixing rod 8 and the settling groove 9, while simultaneously improving the sealing performance through the cooperation of the sealing ring 6 with the annular groove 11 and the ribs 12. These designs not only improve product reliability but also simplify the user's operating process, possessing high practical value and promotional significance.

[0033] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A pre-filter with an anti-loosening structure for the filter bottle, comprising a cap and a bottle body, wherein the lower end of the cap is provided with a recess, the inner circumference of the recess is provided with an internal thread, the outer circumference of the upper end of the bottle body is provided with an external thread, and the cap and the bottle body can be screwed together, characterized in that, It also includes a sealing ring that fits tightly against the upper surface of the bottle and the lower surface of the cap located on the inner periphery of the recess. A connecting hole is provided on the peripheral wall of the cap, which connects the outer periphery of the cap to the recessed part. A fixing rod is provided in the connecting hole, which can move and be fixed axially within the connecting hole. When the fixing rod is axially fixed relative to the connecting hole, one end of the fixing rod can be tightly engaged with the external thread to prevent the bottle from rotating relative to the cap.

2. A pre-filter with an anti-loosening structure for the filter bottle according to claim 1, characterized in that, The external thread has an inwardly recessed groove. When the fixing rod is axially fixed relative to the connecting hole, the other end of the fixing rod can be inserted into the groove.

3. A pre-filter with an anti-loosening structure for the filter bottle according to claim 2, characterized in that, One end of the settling trough is provided with an inclined surface. When one end of the fixing rod moves toward the settling trough, it can cooperate with the inclined surface to drive the bottle body to rotate relative to the cap body.

4. A pre-filter with an anti-loosening structure for the filter bottle according to any one of claims 1-3, characterized in that, One end of the connecting hole is configured to connect with the root of the internal thread, so that one end of the fixing rod can act on the thread of the external thread.

5. A pre-filter with an anti-loosening structure for the filter bottle according to claim 4, characterized in that, The upper surface of the bottle is provided with an annular groove, and the sealing ring is disposed in the annular groove.

6. A pre-filter with an anti-loosening structure for the filter bottle according to claim 5, characterized in that, The lower end of the cap, located on the inner periphery of the recess, has a downward-protruding rib. When the bottle is screwed into the cap, the rib can be located on the inner periphery of the side wall of the bottle. The sealing ring is located between the rib and the internal thread.

7. A pre-filter with an anti-loosening structure for the filter bottle according to any one of claims 1-3, 5, and 6, characterized in that, The outer periphery of the cover is provided with a fixing seat that can be adapted to the connecting hole. The fixing seat is provided with a plug hole. The fixing rod moves and rotates axially within the plug hole so that the fixing rod is inserted into the connecting hole and plug hole to achieve axial fixation.

8. A pre-filter with an anti-loosening structure for the filter bottle according to claim 7, characterized in that, The fixing rod is provided with a protruding post, and the fixing seat is provided with a first enlarged hole portion that can communicate with the insertion hole. The protruding post can move axially in the first enlarged hole portion. The inner peripheral wall of the fixing seat is provided with a second enlarged hole portion that can communicate with the insertion hole. The first enlarged hole portion and the second enlarged hole portion are arranged on the fixing seat from the outside to the inside. The protruding post can rotate within the second enlarged hole portion so that the fixing rod no longer moves axially relative to the fixing seat.

9. A pre-filter with an anti-loosening structure for the filter bottle according to claim 8, characterized in that, When the protruding post can rotate within the second enlarged hole, the fixing rod no longer moves axially relative to the connecting hole, and one end of the fixing rod can be tightly engaged with the external thread to prevent the bottle body from rotating relative to the cap body.

10. A pre-filter with an anti-loosening structure for the filter bottle according to any one of claims 1-3, 5, and 6, characterized in that, The connecting hole is a threaded hole, and the fixing rod is a screw.

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