阅读说明：本技术 一种带隔热减重型浮动环的耐高温膨胀节 (High-temperature-resistant expansion joint with heat-insulation weight-reduction floating ring ) 是由 陈文学 陈广斌 陈雷 陈四平 张小朋 齐金祥 于 2021-08-16 设计创作，主要内容包括：本发明实施例公开了一种带隔热减重型浮动环的耐高温膨胀节,包括：端接管、导流筒、浮动环组件、内隔热层、外隔热层、铰链装置。所述浮动环组件由浮动环和限位环组成,其中,所述浮动环为矩形截面的环形结构,内部矩形空腔采用圆周均布筋板进行加强。所述限位环为可承受管道盲板力的生根于端接管上的两个加强环板；所述浮动环的外端与所述铰链装置的一端连接,内端置于生根于所述端接管上的两个限位环之间,所述浮动环的内径与所述端接管之间设置有所述外隔热层。所述端接管远离所述外隔热层的一端与所述导流筒连接；在所述导流筒与所述端接管之间设置有所述内隔热层。本发明可降低浮动环组件的总重量,节约成本,缩短制作周期。(The embodiment of the invention discloses a high-temperature-resistant expansion joint with a heat-insulation weight-reduction type floating ring, which comprises: the heat insulation structure comprises a butt joint pipe, a guide cylinder, a floating ring assembly, an inner heat insulation layer, an outer heat insulation layer and a hinge device. The floating ring assembly is composed of a floating ring and a limiting ring, wherein the floating ring is of an annular structure with a rectangular cross section, and an internal rectangular cavity is reinforced by rib plates uniformly distributed on the circumference. The limiting rings are two reinforcing ring plates which can bear the force of the pipeline blind plate and take root on the end connecting pipes; the outer end of the floating ring is connected with one end of the hinge device, the inner end of the floating ring is arranged between two limiting rings rooted on the end connecting pipe, and the outer heat insulation layer is arranged between the inner diameter of the floating ring and the end connecting pipe. One end of the end connecting pipe, which is far away from the outer heat insulation layer, is connected with the guide shell; and the inner heat insulation layer is arranged between the guide shell and the butt joint pipe. The invention can reduce the total weight of the floating ring component, save the cost and shorten the manufacturing period.)

1. A high temperature resistant expansion joint of thermal-insulated type floating ring that subtracts, its characterized in that, the expansion joint includes: the heat insulation device comprises a butt joint pipe, a guide shell, a floating ring assembly, an inner heat insulation layer, an outer heat insulation layer and a hinge device, wherein the floating ring assembly consists of a floating ring and a limiting ring,

the floating ring is of an annular structure with a rectangular cross section, and an internal rectangular cavity is reinforced by rib plates uniformly distributed on the circumference;

the limiting rings are two reinforcing ring plates which can bear the force of the pipeline blind plate and take root on the end connecting pipe;

the outer end of the floating ring is connected with one end of the hinge device, the inner end of the floating ring is arranged between two limiting rings rooted on the end connecting pipe, and the outer heat insulation layer is arranged between the inner diameter of the floating ring and the end connecting pipe;

one end of the end connecting pipe, which is far away from the outer heat insulation layer, is connected with the guide shell;

and the inner heat insulation layer is arranged between the guide shell and the butt joint pipe.

2. The expansion joint of claim 1 further comprising a bellows, said end fitting comprising a first end fitting and a second end fitting,

the first end connecting pipe and the second end connecting pipe are connected to two ends of the corrugated pipe to form a flexible body, the formed side face is of a T-shaped structure, and the bottom end of the T-shaped structure is of a parallel structure extending out of a set distance.

3. The expansion joint of claim 2, wherein the floating ring assembly comprises a first floating ring assembly and a second floating ring assembly, wherein,

the hinge device is arranged at one end of the first floating ring assembly and the second floating ring assembly, and the protruding part of the T-shaped structure is formed between the first floating ring assembly and the second floating ring assembly.

4. The expansion joint of claim 3, wherein the outer insulation layer comprises a first outer insulation layer and a second outer insulation layer, wherein,

the first outer heat insulation layer is arranged at one end, far away from the hinge device, of the first floating ring assembly, the second outer heat insulation layer is arranged at one end, far away from the hinge device, of the second floating ring assembly, and the first outer heat insulation layer and the second outer heat insulation layer are arranged on parallel structures at two ends of the protruding portion of the T-shaped structure.

5. The expansion joint according to claim 4, wherein the flow sleeve comprises a first flow sleeve and a second flow sleeve, wherein,

the first guide cylinder is arranged at one end of the first end connecting pipe far away from the first outer heat insulation layer,

the second guide cylinder is arranged at one end, far away from the second outer heat insulation layer, of the second end connecting pipe.

6. The expansion joint according to claim 2, wherein the bellows is a flexible tube configured to absorb vibration generated by the flow of the medium and compensate for pipe displacement.

7. The expansion joint of claim 1, wherein the inner insulating layer is configured to insulate heat, avoid coking, and prevent thermal losses in the draft tube.

8. The expansion joint according to claim 1, wherein the materials of the butt pipe, the draft tube, the floating ring assembly, the inner insulating layer, the outer insulating layer and the hinge device are determined according to conditions of operating conditions.

9. The expansion joint of claim 1, wherein the outer insulation layer is configured to insulate the floating ring assembly and to insulate a pipe.

Technical Field

The invention relates to the technical field of expansion joints, in particular to a high-temperature-resistant expansion joint with a heat-insulation and weight-reduction floating ring.

Background

At present, most high-temperature pipelines (such as high-temperature pipelines in a Propane Dehydrogenation (PDH) device) adopt a common expansion joint product structure type, a bearing structural member is directly rooted on a pipe fitting in contact with a medium and is directly conducted by the temperature, so that the temperature of the structural member is also high, and the structural member needs to bear a large load due to the temperature of the medium being 300-700 ℃.

In order to ensure the safe and stable operation of the expansion joint, calculation and thermal stress analysis are required to be carried out strictly according to design conditions, and deformation or fracture failure of a bearing structural member at high temperature is avoided. The thickness of the calculated floating ring structure is very thick and basically ranges from 80mm to 150mm, the purchasing and processing period of the floating ring is long, the weight of the product is heavy, the cost is high, and the product assembly is inconvenient.

Disclosure of Invention

The embodiment of the invention solves the technical problems that: overcomes the defects of the prior art and provides a high-temperature resistant expansion joint with a heat insulation weight reduction type floating ring.

In order to solve the above technical problem, an embodiment of the present invention provides a high temperature resistant expansion joint with a heat insulation weight reduction type floating ring, where the expansion joint includes: the heat insulation device comprises a butt joint pipe, a guide shell, a floating ring assembly, an inner heat insulation layer, an outer heat insulation layer and a hinge device, wherein the floating ring assembly consists of a floating ring and a limiting ring,

the floating ring is of an annular structure with a rectangular cross section, and an internal rectangular cavity is reinforced by rib plates uniformly distributed on the circumference;

the limiting rings are two reinforcing ring plates which can bear the force of the pipeline blind plate and take root on the end connecting pipe;

the outer end of the floating ring is connected with one end of the hinge device, the inner end of the floating ring is arranged between two limiting rings rooted on the end connecting pipe, and the outer heat insulation layer is arranged between the inner diameter of the floating ring and the end connecting pipe to play roles of isolation and heat insulation;

one end of the end connecting pipe, which is far away from the outer heat insulation layer, is connected with the guide shell;

and the inner heat insulation layer is arranged between the guide shell and the butt joint pipe.

Optionally, the expansion joint further comprises a bellows, the end fitting comprising a first end fitting and a second end fitting,

the first end connecting pipe and the second end connecting pipe are connected to two ends of the corrugated pipe to form a flexible body, the formed side face is of a T-shaped structure, and the bottom end of the T-shaped structure is of a parallel structure extending out of a set distance.

Optionally, the floating ring assembly comprises a first floating ring assembly and a second floating ring assembly, wherein,

the hinge device is arranged at one end of the first floating ring assembly and the second floating ring assembly, and the protruding part of the T-shaped structure is formed between the first floating ring assembly and the second floating ring assembly.

Optionally, the outer insulation layer comprises a first outer insulation layer and a second outer insulation layer, wherein,

the first outer heat insulation layer is arranged at one end, far away from the hinge device, of the first floating ring assembly, the second outer heat insulation layer is arranged at one end, far away from the hinge device, of the second floating ring assembly, and the first outer heat insulation layer and the second outer heat insulation layer are arranged on parallel structures at two ends of the protruding portion of the T-shaped structure.

Optionally, the guide shell comprises a first guide shell and a second guide shell, wherein,

the first guide cylinder is arranged at one end of the first end connecting pipe far away from the first outer heat insulation layer,

the second guide cylinder is arranged at one end, far away from the second outer heat insulation layer, of the second end connecting pipe.

Optionally, the bellows is a flexible tube,

the corrugated pipe is configured to absorb vibration generated by the medium flow and compensate pipeline displacement.

Optionally, the inner insulating layer is configured to insulate heat, avoid coking, and prevent heat loss in the guide shell.

Optionally, the materials of the end connection pipe, the draft tube, the floating ring assembly, the inner insulation layer, the outer insulation layer and the hinge device are determined according to the conditions of the working conditions.

Optionally, the outer insulation layer is configured to insulate the floating ring assembly and preserve heat of the pipeline.

Compared with the prior art, the embodiment of the invention has the advantages that:

the embodiment of the invention can meet the safe and stable operation of the bearing structural member of the product under the high-temperature working condition of 300-700 ℃ by adopting the weight-reducing floating ring structure with heat insulation, the total weight of the improved weight-reducing floating ring component can be reduced by about 30 percent compared with that of the integral floating ring component, the cost is saved, and the manufacturing period is shortened.

Drawings

Fig. 1 is a schematic structural diagram of a high temperature resistant expansion joint with a heat insulation weight reduction type floating ring according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1, a high temperature resistant expansion joint with a heat insulation and weight reduction type floating ring according to an embodiment of the present invention is shown, and as shown in fig. 1, the expansion joint may include: the heat insulation structure comprises butt joint pipes (1 and 9), guide cylinders (2 and 8), floating ring assemblies (3 and 10), an inner heat insulation layer 7, an outer heat insulation layer 4 and a hinge device 5, wherein the floating ring assemblies comprise floating rings and limiting rings,

the floating ring is of an annular structure with a rectangular cross section, and an internal rectangular cavity is reinforced by rib plates uniformly distributed on the circumference;

the limiting rings are two reinforcing ring plates which can bear the force of the pipeline blind plate and take root on the end connecting pipe;

the outer end of the floating ring is connected with one end of the hinge device, the inner end of the floating ring is arranged between two limiting rings rooted on the end connecting pipe, and the outer heat insulation layer is arranged between the inner diameter of the floating ring and the end connecting pipe to play roles of isolation and heat insulation;

the hinge device 5 can be arranged at one end of the floating ring assemblies (3 and 10), and the other end of the floating ring assemblies (3 and 10) is provided with the outer heat insulation layer 4;

one end of the outer heat insulation layer 4, which is far away from the floating ring assemblies (3 and 10), is connected with the end connecting pipes (1 and 9), and one end of the end connecting pipes (1 and 9), which is far away from the outer heat insulation layer 4, is connected with the guide cylinders (2 and 8);

an inner heat insulation layer 7 is arranged between the guide shell (2 and 8) and the end connecting pipes (1 and 9).

According to the scheme provided by the embodiment of the invention, the outer heat insulation layer is arranged, so that the heat insulation effect on the floating ring assembly can be achieved, and the inner heat insulation layer has the effects of heat insulation, coking avoidance, heat loss prevention and the like, so that the safe and stable operation of the bearing structural member of the product under the high-temperature working condition of 300-700 ℃ can be met. And the floating ring of the floating ring assembly adopts an annular hollow structure, and the total weight of the floating ring assembly can be reduced by about 30 percent compared with that of an integral floating ring assembly.

Next, the structure of the expansion joint provided by the embodiment of the present invention is described in detail below with reference to fig. 1 and the following specific implementation manner.

In a specific implementation manner of the embodiment of the present invention, the expansion joint may further include a corrugated tube 6, the end connection tube includes a first end connection tube 1 and a second end connection tube 9, the first end connection tube 1 and the second end connection tube 9 may be connected to two ends of the corrugated tube 6 to form a flexible body, a side surface formed by the first end connection tube 1 and the second end connection tube 9 is a T-shaped structure, and a bottom end of the T-shaped structure is a parallel structure extending out by a set distance.

In another specific implementation of the embodiment of the present invention, the floating ring assembly may include a first floating ring assembly 3 and a second floating ring assembly 10, wherein the hinge device 5 may be disposed at one end of the first floating ring assembly 3 and the second floating ring assembly 10, and a protruding portion of a T-shaped structure is formed between the first floating ring assembly 3 and the second floating ring assembly 10.

In another specific implementation manner of the embodiment of the present invention, the outer heat insulation layer includes a first outer heat insulation layer 4 and a second outer heat insulation layer (not shown in the figure), wherein the first outer heat insulation layer 4 is disposed at an end of the first floating ring assembly 3 away from the hinge device 5, the second outer heat insulation layer is disposed at an end of the second floating ring assembly 10 away from the hinge device 5, and the first outer heat insulation layer 4 and the second outer heat insulation layer are disposed on the parallel structures at two ends of the protruding portion of the T-shaped structure.

In another specific implementation manner of the embodiment of the present invention, the draft tube may include a first draft tube 2 and a second draft tube 8, wherein the first draft tube 2 is disposed at an end of the first end connection tube 1 away from the first outer thermal insulation layer 4, and the second draft tube 8 is disposed at an end of the second end connection tube 9 away from the second outer thermal insulation layer.

In another specific implementation of the embodiment of the present invention, the bellows 6 serves as a flexible element, and the bellows 6 is configured to absorb vibration generated by the flow of the medium and compensate for displacement of the pipe.

In another specific implementation manner provided by the embodiment of the present invention, the inner thermal insulation layer 7 is configured to insulate heat, avoid coking, and prevent thermal loss in the guide shell.

In another specific implementation manner of the embodiment of the invention, the materials of the butt joint pipe, the guide shell, the floating ring assembly, the inner heat insulation layer, the outer heat insulation layer and the hinge device are determined according to conditions of working conditions. For example, the material of the end connecting pipe, the guide cylinder and the floating ring assembly is 321H, the material of the inner heat insulation layer and the outer heat insulation layer can be ceramic fiber cotton, the material of the hinge device can be A516Gr70, the material of the corrugated pipe can be 321H, and the like.

In another particular implementation of the embodiment of the invention, the outer insulating layer is configured to insulate the floating ring assembly.

The expansion joint provided by the embodiment of the invention comprises the end joint pipe 1 and the end joint pipe 9 which are used as main pressure-bearing pipe fittings for connecting pipelines and equipment. The guide shell 2 and the guide shell 8 play roles in preventing scouring and guiding flow. The weight-reducing type floating ring assembly 3 and the weight-reducing type floating ring assembly 10 are main force-bearing connecting parts of the hinge device 5. The outer heat insulation layer 4 plays a heat insulation role in the weight-reduction type floating ring assembly. The hinge device 5 is a part of the expansion joint that performs angular displacement and bears the blind force. The bellows 6 is a mainly flexible part that can absorb vibrations, compensate for displacements, etc. The inner heat insulation layer 7 has the functions of heat insulation, coking avoidance, pipeline heat loss prevention and the like.

The scheme provided by the embodiment of the invention can realize double heat insulation of the guide cylinder and the floating ring assembly, thereby avoiding deformation or fracture failure of the bearing structural member at high temperature.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.