1. The utility model provides an easy detachable connection structure suitable for middle-size and small-size cylindrical radial seal structure spare which characterized in that: the plastic bar material sealing device comprises a cylindrical radial sealing structural part A (5) and a cylindrical radial sealing structural part B (6), wherein a semicircular circumferential groove A (1) is formed in the cylindrical radial sealing structural part A (5), a semicircular circumferential groove B (3) is formed in the cylindrical radial sealing structural part B (6), and when the cylindrical radial sealing structural part A (5) is inserted into the cylindrical radial sealing structural part B (6) and is installed in place, the semicircular circumferential groove A (1) and the semicircular circumferential groove B (3) are vertically matched to form a complete circumferential round hole for accommodating a plastic bar material; and a reserved notch (9) is arranged on the outer side cylindrical surface of the cylindrical radial sealing structural part B (6), and a plastic bar is stuffed into the circumferential circular hole from the reserved notch (9) to form axial movement limiting.

2. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 1, is characterized in that: the cylindrical radial sealing structural part B (6) is provided with a semicircular anti-rotation pin hole (7), the cylindrical radial sealing structural part A (5) is provided with an anti-rotation pin (8), and when the anti-rotation pin (8) is inserted into the anti-rotation pin hole (7), rotation limiting is formed.

3. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 1, is characterized in that: a radial sealing groove (2) is arranged on the cylindrical radial sealing structural part A (5), and a radial sealing surface (4) is arranged on the inner wall of the cylindrical radial sealing structural part B (6); when the radial sealing ring is installed in place, a radial seal is formed by the sealing ring in the radial sealing groove (2) and the radial sealing surface (4).

4. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 1, is characterized in that: the plastic bars are flexible plastic bars.

5. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 1 or 4, is characterized in that: the plastic bars are in clearance fit with the circumferential round holes.

6. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 2, is characterized in that: the anti-rotation pin (8) is a bulge not exceeding the outer cylindrical surface.

7. The easy-to-detach connecting structure suitable for the small and medium-sized cylindrical radial sealing structural part according to claim 1, is characterized in that: the reserved notch (9) is provided with a curved conformal part.

8. The utility model provides an easy detachable connection method suitable for middle-size and small-size cylindrical radial seal structure spare which characterized in that: the method comprises the following steps:

(1) during installation, the anti-rotation pin (8) corresponds to the anti-rotation pin hole (7), and one end part of the cylindrical radial sealing structural part A (5) is inserted into the cylindrical radial sealing structural part B (6);

(2) after the plastic bar is installed in place, the rotation limiting is formed when the rotation preventing pin (8) is inserted into the rotation preventing pin hole (7), the semi-circular circumferential groove A (1) and the semi-circular circumferential groove B (3) are vertically matched to form a complete circumferential round hole for accommodating the plastic bar, and radial sealing is formed by the sealing ring in the radial sealing groove (2) and the radial sealing surface (4);

(3) inserting a plastic bar into the circumferential round hole to form axial movement limit through a reserved gap (9);

(4) and after the plastic bar is installed, the reserved gap (9) is sealed by a curved conformal part.

Background

In practical engineering application, compared with end face sealing, a large number of small and medium-sized airtight and watertight cylindrical parts adopt a radial sealing mode to reduce the size. Such as buoys, submerged buoys, etc., in marine engineering, which involve the interconnection of a plurality of cylindrical radial seal structures. The currently common connection form of the cylindrical radial sealing structural part is circumferential screw fixation. Such a form of connection has several disadvantages:

1. after the radial sealing element is provided with the countersunk holes and the threaded holes in the circumferential direction, sharp edges are easily formed on the inner side of the radial sealing element, and a steel wire thread insert is arranged in the threaded holes in certain scenes. When the radial sealing ring is pressed in, the sealing ring is extruded, and part of the sealing ring can be extruded into the counter sink and the threaded hole to be cut by the sharp edge, so that the sealing failure risk is generated;

2. the circumferential screws are required to be completely screwed off during each disassembly, the operation is time-consuming and labor-consuming, and particularly when the number of the screws is large;

3. in ocean engineering application, stainless steel screws are often adopted to fix aluminum alloy parts, and due to the existence of thread gaps, aluminum alloy materials are very obviously oxidized.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an easy-to-detach connecting structure and an easy-to-detach connecting method for small and medium-sized cylindrical radial sealing structural parts.

The object of the present invention is achieved by the following technical means. An easily-detached connecting structure suitable for small and medium-sized cylindrical radial sealing structural parts comprises a cylindrical radial sealing structural part A and a cylindrical radial sealing structural part B, wherein a semi-circular circumferential groove A is formed in the cylindrical radial sealing structural part A, a semi-circular circumferential groove B is formed in the cylindrical radial sealing structural part B, and when the cylindrical radial sealing structural part A is inserted into the cylindrical radial sealing structural part B and is installed in place, the semi-circular circumferential groove A and the semi-circular circumferential groove B are vertically matched to form a complete circumferential round hole for accommodating a plastic bar; and a reserved notch is formed in the outer side cylindrical surface of the cylindrical radial sealing structural part B, and a plastic bar is stuffed into the circumferential round hole from the reserved notch to form axial movement limiting.

Furthermore, a semicircular anti-rotation pin hole is formed in the cylindrical radial sealing structural part B, an anti-rotation pin is arranged on the cylindrical radial sealing structural part A, and when the anti-rotation pin is inserted into the anti-rotation pin hole, rotation limiting is formed.

Furthermore, a radial sealing groove is formed in the cylindrical radial sealing structural part A, and a radial sealing surface is formed on the inner wall of the cylindrical radial sealing structural part B6; when the radial sealing ring is installed in place, a radial seal is formed by the sealing ring in the radial sealing groove and the radial sealing surface.

Furthermore, the plastic bar is a flexible plastic bar.

Furthermore, the plastic bar is in clearance fit with the circumferential round hole.

Furthermore, the anti-rotation pin is a bulge which does not exceed the outer cylindrical surface.

Furthermore, a curved conformal part is arranged on the reserved gap.

The invention also provides an easy-to-detach connecting method suitable for small and medium-sized cylindrical radial sealing structural parts, which comprises the following steps:

1. during installation, the anti-rotation pins correspond to the anti-rotation pin holes, and one end part of the cylindrical radial sealing structural part A is inserted into the cylindrical radial sealing structural part B;

2. after the plastic bar is installed in place, the rotation limiting is formed when the rotation preventing pin is inserted into the rotation preventing pin hole, the semi-circular circumferential groove A and the semi-circular circumferential groove B are matched up and down to form a complete circumferential round hole for accommodating the plastic bar, and radial sealing is formed between the sealing ring in the radial sealing groove and the radial sealing surface;

3. filling a plastic bar into the circumferential round hole to form axial movement limit through the reserved gap;

4. after the plastic bar is installed, the reserved gap is sealed by a curved conformal part.

In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:

1. the time for mounting and dismounting the cylindrical sealing element is effectively reduced;

2. a threaded hole and a corresponding counter bore are omitted, and the risk of cutting the sealing ring is reduced;

3. in some underwater aluminum alloy part connection applications, the plastic rods replace the stainless steel screws, which can slow down the time for the aluminum alloy parts to oxidize.

Drawings

FIG. 1 is a schematic view of the plastic rod hole and sealing structure of the present invention;

FIG. 2 is a schematic view of an anti-rotation structure of the present invention;

fig. 3 is a schematic diagram of the structure of the reserved gap according to the present invention.

Description of reference numerals: semicircle circumference slot A1, radial seal groove 2, semicircle circumference slot B3, radial seal face 4, cylindrical radial seal structure A5, cylindrical radial seal structure B6, prevent changeing pinhole 7, prevent changeing round pin 8, reserve breach 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 3, an easily detachable connection structure suitable for a small and medium-sized cylindrical radial sealing structural member includes a cylindrical radial sealing structural member a5 and a cylindrical radial sealing structural member B6, wherein a semicircular groove a1 is provided on the cylindrical radial sealing structural member a5, and a semicircular groove B3 is provided on the cylindrical radial sealing structural member B6, and when the cylindrical radial sealing structural member a5 is inserted into the cylindrical radial sealing structural member B6 and is installed in place, the semicircular groove a1 and the semicircular groove B3 are vertically matched to form a complete circumferential round hole for accommodating a plastic bar (not shown in the drawings); a reserved notch 9 is formed in the outer side cylindrical surface of the cylindrical radial sealing structural part B6, a plastic bar is stuffed into the circumferential round hole from the reserved notch 9 to form axial movement limitation, and a curved conformal part is arranged on the reserved notch 9.

As a preferable technical scheme, the plastic bar can adopt any flexible shear-resistant bearing plastic bar, and the surface of the plastic bar needs to be smooth so as to reduce the friction force during plugging, such as a polytetrafluoroethylene bar. Specifically, the plastic bar is a bearing part, and materials and dimensions are selected according to the stress condition in actual use. The plastic bars and the circumferential round holes are in clearance fit, so that the plastic bars are convenient to mount and dismount. It should be noted that the plastic rod is only a fixing member and does not play a role in water tightness and air tightness, and the water tightness and the air tightness should be realized by radial sealing of a sealing ring.

As a perfection of the technical scheme, a radial seal groove 2 is arranged on the cylindrical radial seal structural member A5, and a radial seal surface 4 is arranged on the inner wall of the cylindrical radial seal structural member B6; when the radial sealing ring is installed in place, a radial seal is formed between the sealing ring in the radial sealing groove 2 and the radial sealing surface 4.

As shown in fig. 2, as a perfect solution of the above technical solution, the cylindrical radial sealing structural member B6 is provided with a semicircular anti-rotation pin hole 7, the cylindrical radial sealing structural member a5 is provided with an anti-rotation pin 8, and when the anti-rotation pin 8 is inserted into the anti-rotation pin hole 7, a rotation limit is formed. The anti-rotation pin 8 is a bulge not exceeding the outer cylindrical surface, and the outer portion of the cylindrical surface is smooth and neat.

The invention also provides an easy-to-detach connecting method suitable for small and medium-sized cylindrical radial sealing structural parts, which adopts plastic bars (flexible plastic bars such as polytetrafluoroethylene) to connect two cylindrical radial sealing parts, and specifically comprises the following steps:

1. during installation, the anti-rotation pin 8 corresponds to the anti-rotation pin hole 7, and one end part of the cylindrical radial sealing structural component A5 is inserted into the cylindrical radial sealing structural component B6;

2. after the installation is in place, the rotation limiting is formed when the rotation preventing pin 8 is inserted into the rotation preventing pin hole 7, the semi-circular circumferential groove A1 and the semi-circular circumferential groove B3 are vertically matched to form a complete circumferential round hole for accommodating the plastic bar, and radial sealing is formed by a sealing ring in the radial sealing groove 2 and the radial sealing surface 4;

3. the plastic bar is plugged into the circumferential round hole to form axial movement limit through the reserved gap 9;

4. after the plastic bar is installed, the reserved gap 9 is sealed by a curved conformal part.

5. During disassembly, the curved conformal pieces are removed, the plastic rods are removed, and the cylindrical radial seal structure a5 and the cylindrical radial seal structure B6 are disassembled.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.