Rotatable double-layer inclined pressure sealing waterproof structure

Abstract

The utility model relates to a rotatable double-layer inclined pressure sealing waterproof structure which comprises a cylindrical main body shell and a corrugated pipe which are matched with each other, and further comprises an upper-layer O-shaped sealing ring, a lower-layer O-shaped sealing ring, and an upper-layer internal screwing nut and a lower-layer internal screwing nut which are in threaded connection with the interior of a notch of the main body shell, the lower layer O-shaped sealing ring is arranged on an axial boss in the main body shell and abuts against the annular inclined sealing face of the lower layer internal rotation nut, and the upper layer O-shaped sealing ring is arranged on the top of the lower layer internal rotation nut and abuts against the annular inclined sealing face of the upper layer internal rotation nut. And the corrugated pipe and the main body shell obliquely compress the upper layer sealing ring and the lower layer sealing ring by screwing the upper layer internal rotation nut and the lower layer internal rotation nut to realize double-layer oblique pressure sealing. The problem that in the prior art, a flat pressing O-shaped sealing ring is insufficient in sealing performance under the high-pressure, high-humidity or complex environment is solved, the requirement for dynamic sealing of 360-degree rotation of the corrugated pipe can be met, meanwhile, disassembly and assembly are convenient, and the difficulty of the assembly technology is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealed waterproof structure technical field, specifically is a rotatable double -deck inclined pressure sealed waterproof structure. BACKGROUND

[0002] The current market waterproof structure mostly adopts the way of flat pressure O type sealing ring. However, the axial compression mode of flat pressure O type sealing ring leads to unimodal distribution of contact stress, and local sealing failure problem is prone to occur under high pressure or complex environment, cannot satisfy certain high demand waterproof demand, secondly when applied to rotating parts, flat pressure O type sealing ring produces "pumping effect" due to the action of circumferential shear force, and leakage amount will gradually increase after rotating more than a certain number of times, and the existing market mainstream rotating sealing scheme cannot satisfy the 360° omnidirectional adjustment demand of the rotating piece in underwater equipment, industrial sealing interface and other high reliability sealing application scenes. Therefore, an improved sealing structure is needed to improve waterproof performance and reliability. SUMMARY

[0003] In view of the above problems, the utility model provides a rotatable double -deck inclined pressure sealed waterproof structure that improves waterproof reliability, meets sealing demand under high pressure environment and realizes 360° rotating dynamic sealing of bellows.

[0004] The utility model discloses the technical scheme that solves above-mentioned technical problem is: a rotatable double -deck inclined pressure sealed waterproof structure, including mutually coordinated cylindrical main body shell and bellows, still including upper layer O type sealing ring, lower layer O type sealing ring, upper layer inner screw nut and lower layer inner screw nut, upper layer inner screw nut with lower layer inner screw nut all are with main body shell slot inner thread connection and the lower part of upper layer inner screw nut with lower layer inner screw nut is all equipped with the annular inclined sealing surface of the face to bellows, the clearance cooperation of bellows and upper layer inner screw nut, lower layer inner screw nut is realized axial location through the screwing of upper layer inner screw nut, lower layer inner screw nut, lower layer O type sealing ring is established on main body shell inner shaft protrusion and with the annular inclined sealing surface of lower layer inner screw nut abuts, upper layer O type sealing ring is established on lower layer inner screw nut top and with the annular inclined sealing surface of upper layer inner screw nut abuts, the bellows and main body shell are through the screwing of upper layer inner screw nut and lower layer inner screw nut and the inclined compression upper layer sealing ring and lower layer sealing ring of upper layer sealing ring and lower layer sealing ring realize double -deck inclined pressure sealing.

[0005] As preferred, the annular inclined sealing surface and O type sealing ring inclined pressure included angle is alpha, 40 DEG ≤ alpha ≤ 60 DEG.

[0006] As preferred, the top end of the bellows is connected to the rotating part, and the bottom connection part of the bellows is limited by the radial protrusion in the main body shell.

[0007] Preferably, the upper layer inner screw nut is provided with an annular auxiliary sealing groove, and the upper layer inner screw nut is sealed with the main body shell through an auxiliary O-shaped sealing ring in the annular auxiliary sealing groove.

[0008] Preferably, the upper layer O-shaped sealing ring, the lower layer O-shaped sealing ring and the auxiliary O-shaped sealing ring are made of a high-pressure-resistant and corrosion-resistant elastic material.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. The utility model discloses a waterproof structure of two layers of inclined pressure O-shaped sealing rings, which improves the sealing performance, significantly reduces the risk of liquid leakage, solves the problem of insufficient sealing performance of flat pressure O-shaped sealing rings in high pressure, high humidity or complex environments in the prior art, and is suitable for underwater equipment, industrial sealing interfaces and other application scenarios requiring high reliability sealing.

[0011] 2. The inclined pressure included angle of 40°-60° of the utility model makes the O-shaped sealing ring produce radial, axial and inclined composite compression, realizes dynamic sealing of 360° rotation of the corrugated pipe in deep water, high pressure, high humidity and other complex waterproof environments, and meets the requirements of the corrugated pipe.

[0012] 3. The utility model discloses that the upper layer inner screw nut is sealed with the main body shell through an auxiliary O-shaped sealing ring, so that the third layer sealing of the device is realized, and the waterproof reliability of the sealing structure is further improved.

[0013] 4. The utility model enhances the stability and durability of the sealing structure, prolongs the service life of the product, and through structure optimization, facilitates disassembly and assembly, reduces assembly difficulty and processing cost, and improves production efficiency. DRAWINGS

[0014] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 It is Figure 1 Along A-A full section schematic diagram;

[0016] Figure 3 It is Figure 1 Along A-A half section schematic diagram. DETAILED DESCRIPTION

[0017] The utility model will be combined with the following Figures 1-3 The utility model discloses a schematic embodiment and the explanation used to explain the utility model, but does not as the limitation of the utility model.

[0018] The rotatable double-layer inclined pressure sealing waterproof structure comprises a cylindrical main body shell 5 and a bellows 6 matched with each other, and further comprises an upper O-shaped sealing ring 2, a lower O-shaped sealing ring 4, an upper inner screw nut 1 and a lower inner screw nut 3, the upper inner screw nut and the lower inner screw nut are connected with the inner thread of the main body shell slot, and the lower part of the upper inner screw nut and the lower inner screw nut is provided with an annular inclined sealing surface facing the bellows, the bellows is matched with the upper inner screw nut and the lower inner screw nut in a clearance and is axially limited by the upper inner screw nut and the lower inner screw nut, the top end of the bellows is connected with a rotating part, the bottom connecting part of the bellows is limited by the radial boss in the main body shell, the lower O-shaped sealing ring is arranged on the axial boss in the main body shell and abuts against the annular inclined sealing surface of the lower inner screw nut, the upper O-shaped sealing ring is arranged on the top of the lower inner screw nut and abuts against the annular inclined sealing surface of the upper inner screw nut, the included angle between the annular inclined sealing surface and the upper O-shaped sealing ring or the lower O-shaped sealing ring is α, and 40°≤α≤60°, the bellows and the main body shell are inclinedly compressed by rotating the upper inner screw nut and the lower inner screw nut to realize double-layer inclined pressure sealing of the upper sealing ring and the lower sealing ring.

[0019] Further, the upper part of the upper inner screw nut is provided with an annular auxiliary sealing groove, and the upper inner screw nut and the main body shell are sealed by an auxiliary O-shaped sealing ring 7 in the annular auxiliary sealing groove.

[0020] In the utility model, the upper O-shaped sealing ring, the lower O-shaped sealing ring and the auxiliary O-shaped sealing ring are made of high-pressure-resistant and corrosion-resistant elastic materials, such as silica gel or fluororubber.

[0021] In the embodiment, the sealing structure is applied to a deep-water underwater photography equipment, the main body shell is a handle rod, the top of the bellows is connected with a light assembly, the bellows is first assembled into the handle rod and positioned by the radial boss below, then the upper inner screw nut and the lower inner screw nut are rotated to axially limit and inclinedly compress the upper sealing ring and the lower sealing ring to realize double-layer inclined pressure sealing, and the bellows can be rotated by 360° to adjust the light assembly to any required illumination direction in the case of deep-water waterproofing.

[0022] The technical scheme provided by the utility model embodiment is described in detail above, and the principle and implementation mode of the utility model embodiment are described by applying specific examples; the above embodiment description is only applicable to helping understand the principle of the utility model embodiment; meanwhile, the specific implementation mode and application range of the utility model embodiment will be changed by the person skilled in the art, and the content of the specification should not be understood as limiting the utility model.

Claims

1. A rotatable double-layered angle press sealing waterproof structure, characterized in that: The application relates to a rotating joint, which comprises a cylindrical main body shell (5) and a bellows (6) matched with each other, and further comprises an upper O-shaped sealing ring (2), a lower O-shaped sealing ring (4), an upper inner screw nut (1) and a lower inner screw nut (3), the upper inner screw nut and the lower inner screw nut are connected with the inner thread of the main body shell slot, the lower part of the upper inner screw nut and the lower inner screw nut is provided with an annular inclined sealing surface facing the bellows, the bellows is matched with the upper inner screw nut and the lower inner screw nut in a clearance mode and is axially limited by screwing the upper inner screw nut and the lower inner screw nut, the lower O-shaped sealing ring is arranged on the axial boss of the main body shell and abuts against the annular inclined sealing surface of the lower inner screw nut, the upper O-shaped sealing ring is arranged on the top of the lower inner screw nut and abuts against the annular inclined sealing surface of the upper inner screw nut, the bellows and the main body shell are connected by screwing the upper inner screw nut and the lower inner screw nut to compress the upper sealing ring and the lower sealing ring to realize double-layer inclined compression sealing.

2. The rotatable double-layered angle press sealing waterproof structure according to claim 1, characterized in that: The inclined compression angle between the annular inclined sealing surface and the O-shaped sealing ring is alpha, 40 DEG <= alpha <= 60 DEG.

3. The rotatable double-layered angle-seal waterproof structure according to claim 1, wherein: The top end of the bellows is connected with a rotating part, and the bottom connecting part of the bellows is limited by the radial boss in the main body shell.

4. The rotatable double-layered angle-seal waterproof structure according to claim 1, wherein: The upper part of the upper inner screw nut is provided with an annular auxiliary sealing groove, and the upper inner screw nut and the main body shell are sealed by an auxiliary O-shaped sealing ring (7) in the annular auxiliary sealing groove.

5. The rotatable double-layered angle-seal waterproof structure according to claim 4, wherein: The upper O-shaped sealing ring, the lower O-shaped sealing ring and the auxiliary O-shaped sealing ring are made of high-pressure-resistant and corrosion-resistant elastic materials.

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