CN213018295U

CN213018295U - High-pressure wear-resistant bellows expansion joint

Info

Publication number: CN213018295U
Application number: CN202021479466.1U
Authority: CN
Inventors: 洪忠良; 王岩
Original assignee: Tieling Zhongliang Anticorrosive Anti Wear Co ltd
Current assignee: Tieling Zhongliang Anticorrosive Anti Wear Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-04-20
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a wear-resisting bellows expansion joint of high pressure, including coaxial end pipe, sleeve pipe and takeover, be equipped with in sheathed tube one end with the annular fixed end plate of end union coupling, be equipped with annular spacing retaining ring at the sheathed tube other end, the takeover cartridge is in the sleeve pipe, be equipped with annular movable end plate near the stiff end board end of takeover, leaves the axial flexible clearance between fixed end plate and the movable end plate, still be equipped with annular bellows retaining ring at the sheathed tube inner wall, be equipped with annular bellows fixed stop at the takeover outer wall that lies in the sleeve pipe, be equipped with the bellows between bellows retaining ring and bellows fixed stop, be equipped with the sealed obturator of polyurethane in the annular space by movable end plate, bellows retaining ring, takeover, sleeve pipe injectd, be equipped with wear-resisting ceramic layer at the inner wall of end pipe and takeover. The high-pressure wear-resistant corrugated pipe expansion joint does not leak when conveying high-pressure slurry, and has the advantages of simple structure, good wear resistance, long service life and the like.

Description

High-pressure wear-resistant bellows expansion joint

Technical Field

The utility model relates to a bellows expansion joint, especially a can bear high pressure, stand wear and tear bellows expansion joint.

Background

The power plant, often will use the mortar pipeline to carry coal ash, slay in the mine production process, however, the pipeline receives weather temperature variation, and the influence of transported substance temperature can take place expend with heat and contract with cold, and expend with heat and contract with cold can produce piping stress, causes the potential safety hazard to the safety of pipeline and transportation, consequently, need set up the expansion joint that has the compensatory action on the mortar pipeline, prevents that piping stress from causing the destruction to the mortar pipeline. The corrosion-resistant effect of the expansion joint of the corrugated pipe in the prior art is poor, and when the conveying pressure is higher, axial leakage is easily generated at the expansion joint part, so that the service life of the expansion joint is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is: the high-pressure wear-resistant corrugated pipe expansion joint does not leak when conveying high-pressure slurry, and has the advantages of simple structure, good wear resistance, long service life and the like.

The technical scheme for solving the technical problem is as follows: the utility model provides a wear-resisting bellows expansion joint of high pressure, includes coaxial end pipe, sleeve pipe and takeover, is equipped with the annular fixed end plate of being connected with the end pipe in sheathed tube one end, is equipped with annular spacing retaining ring at the sheathed tube other end, the takeover cartridge is in the sleeve pipe, is equipped with annular movable end plate near the fixed end plate end of takeover, leaves the axial flexible clearance between fixed end plate and the movable end plate, still is equipped with annular bellows fixed retaining ring at the sheathed tube inner wall, is equipped with annular bellows fixed stop plate at the takeover outer wall that lies in the sleeve pipe, is equipped with the bellows between bellows fixed retaining ring and bellows fixed stop plate, is equipped with the sealed obturator of polyurethane in the annular space by movable end plate, bellows fixed retaining ring, takeover, sleeve pipe injectment, is equipped with wear-resisting.

As a one-step improvement scheme of the utility model: the wear-resistant ceramic layer is formed by wear-resistant ceramic plates which are adhered to the inner walls of the end pipe and the connecting pipe by epoxy resin.

As a one-step improvement scheme of the utility model: the radial clearance between the outer edge of the movable end plate and the inner wall of the sleeve is 1-3 mm.

As a one-step improvement scheme of the utility model: the radial clearance between the inner edge of the corrugated pipe retaining ring and the outer wall of the connecting pipe is 1-3 mm.

As a one-step improvement scheme of the utility model: the distance between the movable end plate and the corrugated pipe fixed retainer ring is not less than 100 mm.

Has the advantages that: the high-pressure wear-resistant corrugated pipe expansion joint of the utility model comprises a coaxial end pipe, a sleeve and a connecting pipe, wherein one end of the sleeve is provided with an annular fixed end plate connected with the end pipe, the other end of the sleeve is provided with an annular limiting check ring, the connecting pipe is inserted in the sleeve, the end of the connecting pipe close to the fixed end plate is provided with a movable end plate, an axial expansion gap is reserved between the fixed end plate and the movable end plate, the inner wall of the sleeve is also provided with a corrugated pipe fixed check ring, the outer wall of the connecting pipe in the sleeve is provided with a corrugated pipe fixed baffle, a corrugated pipe is arranged between the corrugated pipe fixed baffle and the corrugated pipe fixed baffle, a polyurethane sealing filler is arranged in an annular space limited by the movable end plate, the corrugated pipe fixed baffle, the connecting pipe and the sleeve, the inner wall of the end pipe and the connecting pipe is provided with a wear-resistant, the polyurethane sealing filler is used for sealing a gap between the movable end plate and the inner wall of the sleeve and a gap between the corrugated pipe fixing retainer ring and the outer wall of the connecting pipe, so that axial leakage generated in the gap during high-pressure mortar conveying can be effectively prevented, polyurethane has certain elasticity and is not enough to influence the expansion and contraction of the connecting pipe in the sleeve, and the wear-resistant and corrosion-resistant properties of the expansion joint are improved by arranging the wear-resistant ceramic layers on the inner walls of the end pipe and the connecting pipe, so that the service life of the expansion joint is prolonged. Because adopted wear-resisting ceramic layer is by adopting the technical characteristics that epoxy pasted the wear-resisting potsherd constitution at end pipe and takeover inner wall for the wear-resisting ceramic layer of high pressure wear-resisting bellows expansion joint preparation is more convenient, and manufacturing cost is lower, and can change damaged wear-resisting potsherd alone according to the wearing and tearing condition of wear-resisting potsherd in the use, has further reduced the daily maintenance cost of equipment. Because the radial clearance between the outer edge of the movable end plate and the inner wall of the sleeve and the radial clearance between the inner edge of the corrugated pipe fixed retainer ring and the outer wall of the connecting pipe are reasonably limited, on the premise of ensuring the free expansion of the corrugated expansion joint, the guiding and limiting functions are realized between the outer edge of the movable end plate and the inner wall of the sleeve and between the inner edge of the corrugated pipe fixed retainer ring and the outer wall of the connecting pipe, the connecting pipe is ensured to be always expanded along the common axis with the end pipe, and the corrugated expansion joint is prevented from being bent and damaged in the use process. Owing to rationally injectd the distance between activity end plate and the bellows retaining ring, when guaranteeing sealed effect, reduce the sealed obturator of polyurethane to the flexible influence of bellows, make the utility model discloses a high pressure wear-resisting bellows expansion joint can carry 10 Mpa's thick liquids safely.

Drawings

The high-pressure wear-resistant bellows expansion joint of the present invention will be further described in detail with reference to the accompanying drawings.

Fig. 1 is an axial sectional structural schematic diagram of the high-pressure wear-resistant bellows expansion joint of the present invention.

Detailed Description

As shown in fig. 1, the high-pressure wear-resistant bellows expansion joint of the present invention comprises a coaxial end pipe 3, a sleeve 10 and a connecting pipe 12, one end of the sleeve is provided with an annular fixed end plate 4 connected with the end pipe, the other end of the sleeve is provided with an annular limiting retainer ring 11, the connecting pipe is inserted in the sleeve, an annular movable end plate 5 is arranged at the end of the connecting pipe close to the end pipe, an axial telescopic gap is reserved between the fixed end plate and the movable end plate, the inner wall of the sleeve is also provided with an annular corrugated pipe fixing retainer ring 7, the outer wall of the connecting pipe in the sleeve is provided with an annular corrugated pipe fixing baffle 9, a corrugated pipe 8 is arranged between the corrugated pipe fixed retainer ring and the corrugated pipe fixed baffle, a polyurethane sealing filler 6 is arranged in an annular space limited by the movable end plate, the corrugated pipe fixed retainer ring, the connecting pipe and the sleeve, the inner walls of the end pipe and the connecting pipe are provided with wear-resistant ceramic layers 1, and the wear-resistant ceramic layers are formed by adopting epoxy resin to paste wear-resistant ceramic plates on the inner walls of the end pipe and the connecting pipe. Preferably, the radial clearance between the outer edge of the movable end plate and the inner wall of the sleeve is 1-3 mm, the radial clearance between the inner edge of the corrugated pipe fixed retainer ring and the outer wall of the connecting pipe is 1-3 mm, the connecting pipe can be ensured to freely stretch in the sleeve, and the distance between the movable end plate and the corrugated pipe fixed retainer ring is not less than 100 mm.

The utility model discloses a wear-resisting bellows expansion joint of high pressure also can set up flange 2 on the end pipe at wear-resisting bellows expansion joint of high pressure, the takeover according to actual need for use simple to operate.

The utility model discloses a wear-resisting bellows expansion joint of high pressure not only can be used for carrying the pipeline of pulpiness material, also can be used to carry the pipeline of powdery material.

Claims

1. The utility model provides a wear-resisting bellows expansion joint of high pressure, includes coaxial end pipe, sleeve pipe and takeover, characterized by: the corrugated pipe sealing filling device is characterized in that an annular fixed end plate connected with an end pipe is arranged at one end of the sleeve, an annular limiting check ring is arranged at the other end of the sleeve, the connecting pipe is inserted into the sleeve, an annular movable end plate is arranged at the end, close to the fixed end plate, of the connecting pipe, an axial telescopic gap is reserved between the fixed end plate and the movable end plate, an annular corrugated pipe fixed check ring is further arranged on the inner wall of the sleeve, an annular corrugated pipe fixed baffle is arranged on the outer wall of the connecting pipe in the sleeve, a corrugated pipe is arranged between the corrugated pipe fixed baffle and the corrugated pipe fixed baffle, a polyurethane sealing filling body is arranged in an annular space limited by the movable end plate, the corrugated pipe fixed baffle, the connecting.

2. A high pressure, wear resistant bellows expansion joint as claimed in claim 1, wherein: the wear-resistant ceramic layer is formed by wear-resistant ceramic plates which are adhered to the inner walls of the end pipe and the connecting pipe by epoxy resin.

3. A high pressure, wear resistant bellows expansion joint as claimed in claim 1 or 2, wherein: the radial clearance between the outer edge of the movable end plate and the inner wall of the sleeve is 1-3 mm.

4. A high pressure, wear resistant bellows expansion joint as claimed in claim 3, wherein: the radial clearance between the inner edge of the corrugated pipe retaining ring and the outer wall of the connecting pipe is 1-3 mm.

5. A high pressure, wear resistant bellows expansion joint as claimed in claim 4, wherein: the distance between the movable end plate and the corrugated pipe fixed retainer ring is not less than 100 mm.