CN221034569U - Durable expansion joint structure of waste heat boiler - Google Patents

Abstract

The utility model relates to the technical field of expansion joints, in particular to a durable expansion joint structure of a waste heat boiler. The utility model has the advantages of large compensation quantity, adaptability to axial and transverse displacement and higher durability.

Description

Durable expansion joint structure of waste heat boiler

Technical Field

The utility model relates to the technical field of expansion joints, in particular to a durable expansion joint structure of a waste heat boiler.

Background

Expansion joints refer to flexible elements that effectively function to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and is easy to deform, the thermal expansion difference of the tube and the shell caused by different wall temperatures can be compensated, and the axial load of the tube and the shell is reduced, so that the temperature difference stress of the tube, the tube plate and the shell is reduced, and the damage caused by strength damage, instability damage and tube pull-out damage is avoided. The expansion joint has a plurality of types, and commonly used structures such as wave form, ring plate welding and clamping type are adopted, wherein the wave form expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions.

The exhaust-heat boiler uses in the import flue with the gas vent connection of combustion engine, because the exhaust-gas displacement of gas vent is very big, so can lead to the junction to have great pressure, consequently need use expansion joint structure, the expansion joint structure expansion volume of present use is less, is inconvenient for adapting to the axial and the lateral displacement that the pipeline produced, leads to expansion joint structure to receive life weak point, does not have better durability.

Disclosure of utility model

The utility model aims to provide a durable expansion joint structure of a waste heat boiler, which has the advantages of large compensation quantity, adaptability to axial and transverse displacement and higher durability, and solves the problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a durable expansion joint structure of exhaust-heat boiler, includes bellows body, head rod and second mounting panel, the bellows body is including ripple portion and straight tube portion, and ripple portion is provided with two, and between the ripple position straight tube portion, the outside face welding of bellows body has the annular plate that is symmetric distribution, and the welding has the connecting plate on the annular plate, the head rod is installed on the connecting plate, and the spring is installed to the end department of head rod, and the second connecting rod is installed to the end of spring, the second mounting panel is installed between the second connecting rod, has seted up the screw hole on the second mounting panel, and threaded hole screw thread installs fixing bolt, fixing bolt's end is installed the fixed plate through the bearing rotation, and the fixed plate is fixed with the straight tube portion contact of bellows body.

Preferably, the four connecting plates are distributed in an annular array with respect to the annular plate.

Preferably, the connecting plate is provided with a connecting hole, the outer surface of the initial end of the first connecting rod is provided with an external thread structure, the initial end of the first connecting rod is positioned in the connecting hole, and the initial end of the first connecting rod is provided with a nut head in a threaded manner.

Preferably, the two ends of the spring are welded with the first mounting plate, and the first connecting rod and the second connecting rod are welded and fixed with the first mounting plate respectively.

Compared with the prior art, the utility model has the following beneficial effects: when the corrugated pipe body is subjected to medium pressure on the inner wall in use, the two groups of corrugated parts on the corrugated pipe body can adapt to axial and transverse displacement, the two groups of corrugated parts are simultaneously positioned to ensure that the compensation amount is larger, and can buffer under the action of a spring, so that the stability of the corrugated parts can be kept, the corrugated parts are prevented from being damaged, and meanwhile, the fixing plate is contacted and clamped with the straight pipe part, the straight pipe part can be protected, and the straight pipe part can be prevented from deforming when the corrugated parts axially displace, so that the corrugated pipe has longer service life and higher durability.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

Fig. 3 is a schematic partial elevation view of the present utility model.

Reference numerals and names in the drawings are as follows:

1. A bellows body; 2. an annular plate; 3. a corrugated portion; 4. a fixing plate; 5. a fixing bolt; 6. a bearing; 7. a straight pipe section; 8. a first connecting rod; 9. a first mounting plate; 10. a second mounting plate; 11. a second connecting rod; 12. a spring; 13. a nut head; 14. a connecting plate; 15. and a connection hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1 to 3, an embodiment of the present utility model provides: the utility model provides a durable expansion joint structure of exhaust-heat boiler, includes bellows body 1, head rod 8 and second mounting panel 10, bellows body 1 is including ripple portion 3 and straight tube portion 7, and ripple portion 3 is provided with two, and ripple portion 3 is located between the straight tube portion 7, the outside face welding of bellows body 1 has the annular plate 2 that is symmetrical distribution, and the welding has connecting plate 14 on the annular plate 2, connecting plate 14 is equipped with four altogether, and four connecting plates 14 are annular array distribution about annular plate 2.

In this embodiment, the setting of annular plate 2 is used for installing four connecting plates 14, and connecting plate 14's setting can install head rod 8, after bellows body 1 appears damaging, can dismantle head rod 8, spring 12 and structure such as second connecting rod 11 through dismantling nut 13, also can conveniently overhaul bellows body 1.

Example two

Referring to fig. 1 to 3, an embodiment of the present utility model provides: compared with the first embodiment, the durable expansion joint structure of the exhaust-heat boiler further comprises: the connecting plate is characterized in that the first connecting rod 8 is arranged on the connecting plate 14, a connecting hole 15 is formed in the connecting plate 14, an external thread structure is arranged on the outer surface of the initial end of the first connecting rod 8, the initial end of the first connecting rod 8 is located in the connecting hole 15, a nut head 13 is arranged at the initial end of the first connecting rod 8 in a threaded mode, a spring 12 is arranged at the tail end of the first connecting rod 8, a second connecting rod 11 is arranged at the tail end of the spring 12, first mounting plates 9 are welded at the two ends of the spring 12, the first connecting rod 8 and the second connecting rod 11 are welded and fixed with the first mounting plates 9 respectively, the second mounting plates 10 are arranged between the second connecting rods 11, threaded holes are formed in the second mounting plates 10, fixing bolts 5 are arranged in the threaded holes in a threaded mode, the tail ends of the fixing bolts 5 are rotatably arranged with fixing plates 4 through bearings 6, and the fixing plates 4 are fixed in contact with the straight pipe portions 7 of the corrugated pipe body 1.

In this embodiment, when the bellows body 1 receives the inner wall medium pressure in the use, can adapt to axial and horizontal displacement that produces through two sets of ripple portion 3 on the bellows body 1, can compress spring 12 when ripple portion 3 produces to lie in, can cushion under spring 12's effect, can keep ripple portion 3's stability, and fixed plate 4 contacts and the centre gripping with straight tube portion 7 simultaneously, can protect straight tube portion 7, and when ripple portion 3 produced axial displacement, can prevent that straight tube portion 7 from producing deformation.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. The utility model provides a durable expansion joint structure of exhaust-heat boiler, includes bellows body (1), head rod (8) and second mounting panel (10), its characterized in that: the corrugated pipe body (1) comprises corrugated portions (3) and straight pipe portions (7), the corrugated portions (3) are arranged in two, the corrugated portions (3) are located between the straight pipe portions (7), annular plates (2) which are symmetrically distributed are welded on the outer surfaces of the corrugated pipe body (1), connecting plates (14) are welded on the annular plates (2), first connecting rods (8) are arranged on the connecting plates (14), springs (12) are arranged at the tail ends of the first connecting rods (8), second connecting rods (11) are arranged at the tail ends of the springs (12), second mounting plates (10) are arranged between the second connecting rods (11), threaded holes are formed in the second mounting plates (10), fixing bolts (5) are arranged in threaded holes in a threaded mode, and the tail ends of the fixing bolts (5) are rotatably arranged on the fixing plates (4) through bearings (6) in a contacting and fixing mode with the straight pipe portions (7) of the corrugated pipe body (1).

2. The exhaust-heat boiler durable expansion joint structure according to claim 1, wherein: four connecting plates (14) are arranged in total, and the four connecting plates (14) are distributed in an annular array with respect to the annular plate (2).

3. The exhaust-heat boiler durable expansion joint structure according to claim 1, wherein: the connecting plate (14) is provided with a connecting hole (15), the outer surface of the initial end of the first connecting rod (8) is provided with an external thread structure, the initial end of the first connecting rod (8) is positioned in the connecting hole (15), and the initial end of the first connecting rod (8) is provided with a nut head (13) in a threaded manner.

4. The exhaust-heat boiler durable expansion joint structure according to claim 1, wherein: the two ends of the spring (12) are welded with a first mounting plate (9), and the first connecting rod (8) and the second connecting rod (11) are welded and fixed with the first mounting plate (9) respectively.