CN215596720U

CN215596720U - Sealing device for bulge tubule

Info

Publication number: CN215596720U
Application number: CN202121415268.3U
Authority: CN
Inventors: 石超; 吴长洪; 谢灵娟
Original assignee: Guizhou Yonghong Aviation Machinery Co Ltd
Current assignee: Guizhou Yonghong Aviation Machinery Co Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-01-21
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a sealing device for a bulge tubule, which comprises a plug, an O-shaped sealing ring and a connecting block, wherein the plug comprises an inserting part inserted into the body of the tubule, the surface of the inserting part is provided with a first annular groove, the tail end of the inserting part is connected with a pipe orifice plugging part, and the outer diameter of the pipe orifice plugging part is larger than the inner diameter of the body of the tubule; the O-shaped sealing ring is sleeved in the first annular groove, and when the O-shaped sealing ring is sleeved in the annular groove, the outer diameter of the O-shaped sealing ring is larger than the inner diameter of the thin tube body; the connecting block is including dismantling first connecting block and the second connecting block of connection, and it has first variable cross section notch to open on the first connecting block, and it has second variable cross section notch to open on the second connecting block, and when first connecting block and second connecting block concatenation were together, a variable cross section cylinder cavity was constituteed with the second variable cross section notch to first variable cross section notch, and the minimum internal diameter of variable cross section cylinder cavity is less than the external diameter of swell. The utility model has simple assembly and manufacture and convenient use, and can ensure the smooth implementation of the sealing performance test of the product.

Description

Sealing device for bulge tubule

Technical Field

The utility model relates to a sealing device for assembling, combining and positioning and used for an airtight test of a bulge thin tube structure, in particular to a sealing device for an airtight performance test of parts on an airplane under the conditions of gage pressure of 0.9 +/-0.05 MPa and pressure maintaining of 15 min.

Background

There is a product for use in an aircraft, the main structure of which is composed of a core assembly, an end plate assembly, a hot-side end plate assembly, a cold-side end plate assembly, and the like. Air tightness performance test requirements of the product: air is introduced into the inlet of the hot edge end cover, and the test pressure is as follows: 0.9 plus or minus 0.05MPa (gauge pressure), keeping the pressure for 15min, and not allowing the leakage and deformation of each joint and the outer surface of the product. In the air tightness test process of the product, the bulge thin tubes in the hot and cold edge inlets and outlets of the end cover of the product need to be sealed.

As shown in fig. 1, the tube diameter Φ 12 of the bulge tubule, the outer diameter Φ 13 of the bulge, and the round angle R3 transition are two types of sealing structures for the bulge nozzle: firstly, sealing is carried out through the conical surface of the pipe orifice, and secondly, sealing is carried out through pipe threads. However, the bulge tubule structure has no conical surface or threaded connection, and the diameter of the tubule is small, so that the sealing structure needs to bear the pressure of 0.9 plus or minus 0.05MPa (gauge pressure), and if the limit is insufficient or the clamping force is too small, the test fails and the risk of injury of operators is caused.

Disclosure of Invention

The utility model aims to provide a sealing device for a bulging thin tube, which solves the sealing problem of the bulging thin tube, and aims at the characteristics that the bulging thin tube has neither a conical surface sealing structure nor a threaded sealing structure, the sealing device meeting the pressure maintaining pressure and time requirements is designed, and is convenient to operate by operators, good in sealing effect and simple to manufacture.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a sealing device of swell tubule, the swell tubule includes the tubule body, and the circumference that just has the bulge of the circular arc cross-section of round along the tubule body on the outer wall of tubule body, and sealing device includes:

the plug comprises an insertion part inserted into the tubule body, the surface of the insertion part is provided with a first annular groove, the tail end of the insertion part is connected with a pipe orifice plugging part, and the outer diameter of the pipe orifice plugging part is larger than the inner diameter of the tubule body;

the O-shaped sealing ring is sleeved in the first annular groove, and when the O-shaped sealing ring is sleeved in the annular groove, the outer diameter of the O-shaped sealing ring is larger than the inner diameter of the tubule body;

the connecting block, the connecting block is including dismantling first connecting block and the second connecting block of connection, and it has first variable cross section notch to open on the first connecting block, and it has second variable cross section notch to open on the second connecting block, and when first connecting block and second connecting block concatenation were together, a variable cross section cylinder cavity was constituteed with second variable cross section notch to first variable cross section notch, and the minimum internal diameter of variable cross section cylinder cavity is less than the external diameter of swell.

Further, a second annular groove is formed between the inserting part and the pipe orifice plugging part.

Further, the cross section of the O-shaped sealing ring is circular.

Further, the first connecting block and the second connecting block are symmetrical about the splicing surface of the first connecting block and the second connecting block.

Further, the first variable cross-section notch and the second variable cross-section notch are symmetrical about the splicing surface of the first connecting block and the second connecting block.

Furthermore, a pair of first connecting holes are formed in the first connecting block, a pair of second connecting holes are formed in the second connecting block, the pair of first connecting holes are symmetrical with respect to the first variable cross-section notch, and the pair of second connecting holes are symmetrical with respect to the second variable cross-section notch.

Further, the axial length of the variable cross-section cylindrical cavity is greater than that of the plug.

Compared with the prior art, the sealing device disclosed by the utility model is relatively simple to assemble and manufacture, is relatively convenient in the using process, and can ensure that the sealing performance test of a product is smoothly implemented.

Drawings

FIG. 1 is a schematic view of a bulged thin tube product structure;

FIG. 2 is an assembly view of the seal arrangement;

FIG. 3 is a cross-sectional view of the sealing device of FIG. 2;

FIG. 4 is a schematic view of a plug with an O-ring seal;

FIG. 5 is a schematic view of a connecting block structure;

FIG. 6 is a schematic sectional view taken along line A-A in FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along line B-B in FIG. 5;

FIG. 8 is a perspective view of the connector block;

in the figure: 1. the sealing structure comprises a plug, 2. O-shaped sealing rings, 3. connecting blocks and 4. cylindrical head bolts.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.

As shown in fig. 1 to 8, the sealing device for bulging a tubule includes: the plug comprises a plug 1, an O-shaped sealing ring 2, a connecting block 3 and a cylindrical head bolt 4.

1. The O-shaped sealing ring 2 is matched with a first annular groove on the surface of the insertion part of the plug 1 (as shown in figure 4);

2. inserting the inserting part of the plug 1 after assembling the O-shaped sealing ring 2 into the inner hole of the bulging thin tube with phi 8, and sealing the inner hole of the bulging thin tube by compressing the O-shaped sealing ring 2 (as shown in figures 2 and 3);

3. symmetrical connecting blocks 3 (see fig. 5-8) comprise a first connecting block and a second connecting block which are symmetrical about a splicing surface, two first connecting holes and two second connecting holes are respectively formed in the first connecting block and the second connecting block, the first connecting block and the second connecting block are combined along the splicing surface and then connected through a cylindrical head bolt 4, and a bulge thin tube and a plug 1 are wrapped in a variable cross-section cylindrical cavity.

The plug 1 is inserted into a phi 8 inner hole of the bulge tubule after being matched with the O-shaped sealing ring 2, the step surface between the plugging part and the inserting part of the plug 1 is attached to the end surface of the bulge tubule, the second ring groove on the inserting part is inserted into the inner hole of the bulge tubule, the O-shaped sealing ring 2 is used for sealing through the compression deformation in the inner hole, the connecting block 3 is divided into two parts which are symmetrical up and down, namely a first connecting block and a second connecting block, 1/2 variable cross-section cylindrical cavities are respectively arranged on the first connecting block and the second connecting block (as shown in figure 8), a variable cross-section cylindrical cavity is formed after the first connecting block and the second connecting block are spliced, the variable cross-section cylindrical cavity consists of phi 12.5 cylindrical cavities and phi 17 cylindrical cavities, wherein the size (phi 12.5 cylindrical cavity) matched with the outer diameter of the bulge tubule is smaller than the outer diameter (phi 13) of the bulge tubule, and the variable cross-section cylindrical cavity is used for limiting in the axial direction of the bulge tubule after the connecting block 3 is locked, the space of the plug 1 which is outwards bounced in the test process is controlled to be smaller than the effective contact size of the O-shaped sealing ring 2 and the inner hole pipe wall of the bulge tubule (namely the distance between the upper end face of the plug 1 and the top end of the inner cavity of the connecting block 3 cannot be larger than the effective sliding sealing distance of the O-shaped sealing ring 2 on the inner wall of the tubule, the plug 1 can be popped out due to the overlarge airtight pressure, the space distance cannot be larger than the effective sliding sealing distance of the O-shaped sealing ring 2), and the influence of displacement in the connecting block 3 on the sealing effect is avoided. The connecting block 3 is connected by two cylindrical head bolts 4, the structure is simple to process and convenient to operate, and the sealing is leak-free in the process of keeping pressure for 15min at the gauge pressure of 0.9 +/-0.05 MPa (gauge pressure) of a product.

The method for sealing the bulge tubule by using the sealing device comprises the following steps:

1. the O-shaped sealing ring 2 is matched with the first annular groove on the plug 1;

2. after the plug 1 is matched with the O-shaped sealing ring 2, the inserting part is inserted into an inner hole phi 8 of the thin tube, the plugging part is attached to the end face of the opening of the bulge thin tube, and the second annular groove is positioned in the inner hole of the bulge thin tube;

3. connecting the symmetrical first connecting block and the second connecting block through a cylindrical head bolt 4, wrapping the bulge tubule in a variable cross-section cylindrical cavity, wherein the minimum cross section of the variable cross-section cylindrical cavity is positioned below the bulge of the bulge tubule, and the bulge and the O-shaped sealing ring 2 are positioned in a cavity corresponding to the maximum cross section of the variable cross-section cylindrical cavity;

4. after the test is finished, the connecting block 3 and the plug 1 are dismounted.

Claims

1. The utility model provides a sealing device of swell tubule, the swell tubule includes the tubule body, and on the outer wall of tubule body and along the circumference of tubule body have the swell of the circular arc cross-section of round, its characterized in that: the sealing device comprises a sealing device and a sealing device,

the plug (1) comprises an insertion part inserted into the tubule body, a first annular groove is formed in the surface of the insertion part, the tail end of the insertion part is connected with a pipe orifice plugging part, and the outer diameter of the pipe orifice plugging part is larger than the inner diameter of the tubule body;

the O-shaped sealing ring (2) is sleeved in the first annular groove, and when the O-shaped sealing ring (2) is sleeved in the annular groove, the outer diameter of the O-shaped sealing ring (2) is larger than the inner diameter of the thin tube body;

connecting block (3), connecting block (3) are including dismantling first connecting block and the second connecting block of connection, and it has first variable cross section notch to open on the first connecting block, and it has second variable cross section notch to open on the second connecting block, and when first connecting block and second connecting block concatenation were together, a variable cross section cylinder cavity was constituteed with second variable cross section notch to first variable cross section notch, and the minimum internal diameter of variable cross section cylinder cavity is less than the external diameter of swell.

2. The sealing device for a bulged tubule of claim 1, wherein: a second annular groove is arranged between the inserting part and the pipe orifice plugging part.

3. The sealing device for a bulged tubule of claim 1, wherein: the cross section of the O-shaped sealing ring (2) is circular.

4. The sealing device for a bulged tubule of claim 1, wherein: the first connecting block and the second connecting block are symmetrical about the splicing surface of the first connecting block and the second connecting block.

5. The sealing device for a bulged tubule of claim 1, wherein: the first variable cross-section notch and the second variable cross-section notch are symmetrical about the splicing surface of the first connecting block and the second connecting block.

6. The sealing device for a bulged tubule of claim 1, wherein: the first connecting block is provided with a pair of first connecting holes, the second connecting block is provided with a pair of second connecting holes, the first connecting holes are symmetrical about the first variable cross-section notch, and the second connecting holes are symmetrical about the second variable cross-section notch.

7. The sealing device for a bulged tubule of claim 1, wherein: the axial length of the variable cross-section cylindrical cavity is greater than that of the plug (1).