Filter

Abstract

The utility model relates to a filter which comprises a filter shell and a sealing cover, external threads are arranged on the outer wall of the upper end of the filter shell, a groove used for the top of the filter shell to be inserted is formed in the sealing cover, and internal threads in threaded connection with the external threads are arranged at the bottom of the groove. A sealing gap is reserved between the groove and the filter shell inserted into the groove, and an n-shaped sealing ring is arranged in the sealing gap. The unique design of the n-shaped sealing ring enables the n-shaped sealing ring to form a sealing interface in multiple directions (upper, left and right), compared with traditional single-direction sealing, the sealing contact area is greatly increased, the excellent sealing effect can be ensured even under a dynamic working condition or a high-pressure environment, leakage of a medium is effectively prevented, and the service life of the sealing ring is prolonged. And the working stability and safety of the filter are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter. Background Art

[0002] In the current filter design field, the sealing performance between the filter housing and the cover has always been one of the key factors that determine product reliability and service life. Traditional filter designs usually rely on a single sealing ring placed on the direct contact surface between the housing and the cover to achieve sealing. Although this structure is simple, it often faces the problem of poor sealing effect in actual applications.

[0003] To address this problem, existing improvement solutions on the market mostly focus on using high-performance sealing materials or increasing the number of sealing rings. However, these methods are either costly or still difficult to achieve ideal sealing effects under complex working conditions. Therefore, it is particularly important to develop a filter cap connection structure that can effectively improve sealing performance while being cost-effective and easy to implement. Utility Model Content

[0004] In view of the deficiencies in the background technology, the utility model provides a filter.

[0005] The technical solution adopted by the utility model is: a filter, including a filter housing and a cover, the outer wall of the upper end of the filter housing is provided with an external thread, the cover is provided with a groove for inserting the top of the filter housing, the bottom of the groove is provided with an internal thread threadedly connected to the above-mentioned external thread, a sealing gap is left between the groove and the filter housing inserted into the groove, and an "n"-shaped sealing ring is provided in the sealing gap.

[0006] Furthermore, a dovetail groove is provided on the outer wall of the groove, and the "n"-shaped sealing ring is provided with a dovetail convex ring which is interlocked with the dovetail groove.

[0007] Furthermore, the dovetail convex ring and the dovetail groove are divided into two circles, an upper circle and a lower circle.

[0008] Furthermore, booster rings are provided on both the inner and outer walls of the "n"-shaped sealing ring.

[0009] Furthermore, there are four booster rings, which are arranged at equal intervals along the length direction of the "n"-shaped sealing ring.

[0010] The beneficial effects of the utility model are:

[0011] 1. Enhanced sealing: The unique design of the "n" type sealing ring enables it to form a sealing interface in multiple directions (up, left, and right). Compared with the traditional single-direction seal, it greatly increases the sealing contact area. Even in dynamic working conditions or high-pressure environments, it can ensure excellent sealing effects, effectively prevent leakage of the medium, and improve the stability and safety of the filter operation.

[0012] 2 Improve sealing reliability: The "n" type sealing ring can fit better between the filter housing and the cover after the filter housing is under pressure, forming an elastic sealing pressure, which helps to improve sealing reliability.

[0013] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages.

[0014] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0017] Figure 3 This is an enlarged schematic diagram of point A in the figure.

[0018] Figure 1-3 In: 1. Filter housing; 2. Sealing cover; 3. External thread; 4. Groove; 5. Internal thread; 6. Sealing gap; 7. "N" type sealing ring; 8. Dovetail groove; 9. Dovetail convex ring; 10. Boost ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] The utility model provides a filter.

[0022] In this embodiment, refer to Figure 1-3 The filter comprises a filter housing 1 and a cover 2, wherein an external thread 3 is provided on the outer wall of the upper end of the filter housing, a groove 4 for inserting the top of the filter housing is provided on the cover, an internal thread 5 threadedly connected to the external thread is provided on the bottom of the groove, a sealing gap 6 is left between the groove and the filter housing inserted into the groove, and an "n" type sealing ring 7 is provided in the sealing gap.

[0023] In the above technical solution, by arranging an external thread on the outer shell to engage with the internal thread at the bottom of the inner groove of the cover, and reserving a sealing gap between the two to embed an "n" type sealing ring, a multi-directional tight seal is achieved, the sealing area is effectively increased, and the reliability and stability of the seal are significantly enhanced.

[0024] Specifically, a dovetail groove 8 is provided on the outer wall of the groove, and a dovetail convex ring 9 which is interlocked with the dovetail groove is provided on the "n"-shaped sealing ring; the dovetail convex ring and the dovetail groove are divided into two circles, upper and lower.

[0025] A dovetail groove is added to the outer wall of the groove and engages with the dovetail convex ring on the "n" type sealing ring, ensuring the precise position and stability of the sealing ring during installation.

[0026] Specifically, a booster ring 10 is provided on both the inner wall and the outer wall of the “n” type sealing ring; there are four booster rings 10 which are arranged at equal intervals along the length direction of the “n” type sealing ring.

[0027] A booster ring is added to the inner and outer walls of the "n" type seal ring to increase the sealing pressure between the "n" type seal ring and the sealing gap. At the same time, the seal ring is squeezed by the filter housing, and the sealing pressure between the seal ring and the contact surface is further enhanced through the squeezing effect of the booster ring, so that a good initial sealing state can be achieved even under low torque preload conditions. This design improves the sealing response speed, reduces the wear of the seal ring, and extends the maintenance cycle.

[0028] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the concept of the utility model is not limited to this utility model. Any modification using the concept of the utility model will be included in the scope of protection of this patent right.

Claims

1. A filter, comprising a filter housing and a cover, characterized in that: An external thread is provided on the outer wall of the upper end of the filter housing, and a groove for inserting the top of the filter housing is provided on the sealing cover. An internal thread is provided on the bottom of the groove and is threadedly connected to the external thread. A sealing gap is left between the groove and the filter housing inserted into the groove, and an "n"-shaped sealing ring is provided in the sealing gap.

2. The filter according to claim 1, characterized in that: A dovetail groove is provided on the outer wall of the groove, and a dovetail convex ring which is interlocked with the dovetail groove is provided on the "n"-shaped sealing ring.

3. The filter according to claim 2, characterized in that: The dovetail convex ring and the dovetail groove are divided into two circles, an upper circle and a lower circle.

4. The filter according to claim 1, characterized in that: The inner and outer walls of the "n" type sealing ring are both provided with a booster ring.

5. The filter according to claim 4, characterized in that: There are four booster rings, which are arranged at equal intervals along the length direction of the "n"-shaped sealing ring.

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