CN-121993683-A - Combined high-temperature-resistant rectangular expansion joint

CN121993683ACN 121993683 ACN121993683 ACN 121993683ACN-121993683-A

Abstract

The invention discloses a combined high-temperature-resistant rectangular expansion joint, which relates to the technical field of pipeline thermal compensation and comprises supporting angle steel, a limiting frame and rectangular pipes, wherein expansion parts are equidistantly arranged on the outer walls of the rectangular pipes, butt flange plates are arranged at two ends of each rectangular pipe, and are used as intermediate connecting pieces of the rectangular expansion joint and an air duct, and a bottom fixing plate is fixedly connected with the butt flange plates at the bottoms of the rectangular pipes. According to the invention, the central box is sleeved in the expansion joint, and the central box is provided with the heat absorption module, firstly, the heat absorption module can generate a heat absorption effect based on the mixture of heat absorption salt and water, and the excessive heat can be rapidly transferred to the heat absorption module to be absorbed or transferred, so that the internal thermal stress of the expansion joint is relieved, secondly, the core component of the heat absorption module is a thermal response type unlocking mechanism, the thermal response type unlocking mechanism ensures that the heat absorption module is automatically started only when the expansion joint is overstretched at high temperature, and the heat absorption module is not started when the expansion joint is overstretched due to the action of external force, so that the ineffective starting of the heat absorption module is avoided, and waste is caused.

Inventors

YANG HUICHEN
Shan Jiayang
YANG YUANJIN
YANG YOUJIN

Assignees

江苏新方圆电气设备制造有限公司

Dates

Publication Date: 20260508
Application Date: 20260403

Claims (11)

1. The utility model provides a combination formula high temperature resistant rectangle expansion joint, includes supporting angle steel, spacing frame, rectangular pipe, its characterized in that, rectangular pipe outer wall equidistance is provided with expansion portion, rectangular pipe both ends all are provided with the butt flange board, as rectangle expansion joint and wind channel intermediate junction spare, the butt flange board that is in rectangular pipe bottom fixedly connected with bottom solid board, bottom solid board is fixed to be set up on supporting angle steel; Limiting frames are fixedly arranged at two ends of the supporting angle steel, rectangular pipes are inserted between the four supporting angle steel, and the integral structure of the limiting frames and the supporting angle steel is used as an axial stretching guide structure of the rectangular expansion joint; A central box is arranged in the middle of the four support angle steels, a heat absorption module is arranged in the central box, and the rectangular expansion joint is cooled due to high-temperature overstretched; A vertical rod is fixedly arranged between the two limiting frames, a convertible auxiliary supporting mechanism is arranged on the vertical rod, the top of the rectangular expansion joint is lifted when the rectangular expansion joint is pressed and operated, auxiliary support is provided for preventing the expansion joint from excessive compression deformation, and the top of the expansion joint is temporarily supported in an overhaul state, so that a heat absorption module at the center box can be detached or replaced.
2. The combined high-temperature-resistant rectangular expansion joint according to claim 1, wherein the heat absorbing module comprises a release outer frame, a guide inner frame, a release column and a thermally responsive unlocking mechanism, and a heat conducting copper frame is fixedly arranged in the inner cavity of the central box and transmits the rectangular expansion part to the inner cavity of the central box; The heat-responsive unlocking mechanism ensures that the heat absorption module is opened only when the rectangular expansion joint is excessively stretched at high temperature, the heat-responsive unlocking mechanism comprises a gas storage box, a U-shaped frame and a limiting column, the outer wall of the heat conduction copper frame is symmetrically and fixedly connected with the gas storage box, a connecting column is movably inserted into the inner cavity of the gas storage box, a stress plate is fixedly arranged at one end of the connecting column, nitrogen is filled in one side of the stress plate of the gas storage box, and the top of the stress plate of the gas storage box is fixedly communicated with a cross flow hole.
3. The combined high-temperature-resistant rectangular expansion joint according to claim 2, wherein the outer wall of the connecting column is fixedly connected with one end of a first spring, the other end of the first spring is fixedly arranged in an inner cavity of the air storage box, the other end of the connecting column is fixedly connected with a U-shaped frame, and one end, far away from the connecting column, of the U-shaped frame is provided with a fixed cylinder.
4. The combined high-temperature-resistant rectangular expansion joint according to claim 3, wherein the outer wall of the heat-conducting copper frame is fixedly connected with a guide inner frame, the center box is movably inserted with a release column along the vertical direction, the outer wall of the release column is screwed with a supporting nut, the top of the release column is fixedly connected with a release outer frame, the top of the outer wall of the rectangular tube is symmetrically and fixedly connected with an extension rod, and an application column is arranged on the extension rod.
5. The combined high-temperature-resistant rectangular expansion joint according to claim 1, wherein the convertible auxiliary supporting mechanism comprises a horizontal limiting rod, an adjusting nut and a temporary supporting assembly, a vertical groove is formed in the vertical rod, and stress cross rods are symmetrically and fixedly arranged on the outer wall of the rectangular tube and are located right above the horizontal limiting rod.
6. The combined high-temperature-resistant rectangular expansion joint according to claim 4, wherein the tops of the release outer frame and the guide inner frame are respectively provided with an inclined surface, the release outer frame and the guide inner frame are mutually attached, the inner cavity below the guide inner frame is filled with heat absorption salt, and the inner cavity above the guide inner frame and the release outer frame is filled with cooling water.
7. The combined high-temperature-resistant rectangular expansion joint according to claim 5, wherein the temporary support assembly comprises temporary support rods, support blocks and in-place self-locking assemblies, one ends of the temporary support rods are rotatably connected to the side surfaces of the horizontal limiting rods, the support blocks are fixedly arranged at one ends of the temporary support rods, and the force application blocks are fixedly arranged at one ends, far away from the support blocks, of the temporary support rods.
8. The combined high-temperature-resistant rectangular expansion joint according to claim 7, wherein the top of the horizontal limiting rod is sequentially symmetrically provided with an accommodating groove and an avoiding groove, the supporting block stretches into the accommodating groove, the in-place self-locking assembly comprises a vertical part, a self-locking T rod and a second spring, and the bottom of the horizontal limiting rod is symmetrically and fixedly provided with the vertical part.
9. The combined high-temperature-resistant rectangular expansion joint according to claim 8, wherein a self-locking T rod is movably inserted into one end of the temporary support rod close to the force application block, the outer wall of the self-locking T rod is fixedly connected with one end of a second spring, the other end of the second spring is fixedly connected to the temporary support rod, a guide inclined plane is formed in the side face of the vertical portion, and a storage cavity is formed in the side face of the guide inclined plane.
10. The combined high-temperature-resistant rectangular expansion joint according to claim 3, wherein one end of the fixing cylinder is screwed with an installation end cover, the side surface of the installation end cover is fixedly connected with one end of the connecting spring, the other end of the connecting spring is fixedly connected with a limiting column, a limiting hole is formed in the side surface of the releasing column, and the diameter of the limiting column is the same as that of the limiting hole.
11. The combined high-temperature-resistant rectangular expansion joint according to claim 5, wherein the bottom of the horizontal limiting rod is provided with a bottom extension, the adjusting nut is threaded into the side surface of the bottom extension after passing through the vertical groove, and the width of the head of the adjusting nut is larger than the width of the vertical groove.

Description

Combined high-temperature-resistant rectangular expansion joint Technical Field The invention relates to the technical field of pipeline thermal compensation, in particular to a combined high-temperature-resistant rectangular expansion joint. Background The rectangular expansion joint is a flexible connecting member for compensating expansion and contraction deformation of a pipeline or equipment due to temperature change, the section of the rectangular expansion joint is of a rectangular structure, and the rectangular expansion joint is generally composed of corrugated plates and frames, can absorb axial, transverse and angular displacement under the action of high temperature or pressure, and can prevent the pipeline or equipment from being damaged due to thermal stress. In the prior art, a rectangular expansion joint usually adopts a single corrugated pipe structure or is only provided with a simple supporting frame, so as to compensate expansion caused by temperature change of a pipeline or an air duct, however, under the operation condition that the rectangular expansion joint suddenly encounters high temperature, axial overstretching or overpressure deformation caused by ultrahigh temperature easily occurs, and the flexible part of the corrugated pipe can be partially torn, so that the expansion joint loses due elastic compensation capability. Meanwhile, excessive stretching or compression can cause additional stress to the connecting pipeline, so that the problems of pipeline leakage, instability of the supporting frame and the like are caused. Disclosure of Invention The invention aims to solve the problems that in the prior art, a rectangular expansion joint usually adopts a single corrugated pipe structure or is only provided with a simple supporting frame, so as to compensate expansion caused by temperature change of a pipeline or an air duct, however, under the operation condition that the rectangular expansion joint suddenly encounters high temperature, axial overstretching or overpressure deformation caused by ultrahigh temperature is easy to occur, the flexible part of the corrugated pipe is likely to be torn locally, the expansion joint loses due elastic compensation capability, excessive stretching or compression can cause additional stress to a connecting pipeline, so that pipeline leakage, supporting frame instability and the like are caused. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides a combination formula high temperature resistant rectangle expansion joint, includes supporting angle steel, spacing frame, rectangular pipe outer wall equidistance is provided with expansion portion, rectangular pipe both ends all are provided with the butt flange board, as rectangle expansion joint and wind channel intermediate junction spare, the butt flange board that is in rectangular pipe bottom fixedly connected with bottom solid board, bottom solid board is fixed to be set up on supporting angle steel; Limiting frames are fixedly arranged at two ends of the supporting angle steel, rectangular pipes are inserted between the four supporting angle steel, and the integral structure of the limiting frames and the supporting angle steel is used as an axial stretching guide structure of the rectangular expansion joint; A central box is arranged in the middle of the four support angle steels, a heat absorption module is arranged in the central box, and the rectangular expansion joint is cooled due to high-temperature overstretched; A vertical rod is fixedly arranged between the two limiting frames, a convertible auxiliary supporting mechanism is arranged on the vertical rod, the top of the rectangular expansion joint is lifted when the rectangular expansion joint is pressed and operated, auxiliary support is provided for preventing the expansion joint from excessive compression deformation, and the top of the expansion joint is temporarily supported in an overhaul state, so that a heat absorption module at the center box can be detached or replaced. Optionally, the heat absorption module comprises a release outer frame, a guide inner frame, a release column and a thermal response unlocking mechanism, wherein a heat conduction copper frame is fixedly arranged in the inner cavity of the central box, the heat conduction copper frame transmits a rectangular expansion part to the inner cavity of the central box, the thermal response unlocking mechanism ensures that the heat absorption module is opened only when the rectangular expansion joint is overstretched at high temperature, the thermal response unlocking mechanism comprises a gas storage box, a U-shaped frame and a limit column, the outer wall of the heat conduction copper frame is symmetrically and fixedly connected with a gas storage box, the inner cavity of the gas storage box is movably inserted with a connecting column, one end of the connecting column is fixedly provid