CN207777864U - A kind of expansion joint - Google Patents

Abstract

The utility model discloses a kind of expansion joints, connecting flange including expansion joint ontology and mounted on expansion joint both ends, the expansion joint ontology includes left female connector cylinder, right female connector cylinder, inner sleeve, outer sleeve, bourdon tube and expansion tube, the inner sleeve is sleeved on the right side and connects sleeve inner, the right side connects the right flange of sleeve connection expansion joint, a left side connects the left flange of sleeve connection expansion joint, the right part of left female connector cylinder and the intermeshing of the left part of right female connector cylinder, outer sleeve is sleeved on left female connector cylinder and the right side connects cartridge exterior, bourdon tube entangles outer sleeve, expansion tube made of spring steel is equipped with outside expansion joint, it is equipped between the inner wall and spring pipe outer wall of expansion tube for the logical separate space of cooling liquid stream.The expansion joint structure is compact, easy for installation, and service life is long.

Description

an expansion joint

technical field

The utility model relates to a pipeline safety device, in particular to an expansion joint.

Background technique

Expansion joints are two kinds of flexible structures arranged on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. As two kinds of elastic compensating elements that can expand freely, it has the advantages of reliable operation, good performance and compact structure, and has been widely used in chemical industry, metallurgy, nuclear energy and other departments. Expansion joints are customarily called expansion joints, or bellows compensators, which are used to absorb the dimensional changes of pipelines, conduits or containers due to thermal expansion and contraction by using the effective expansion and contraction deformation of the elastic elements of the expansion joint compensator. Two kinds of compensation devices, belonging to two kinds of compensation components, can absorb axial, lateral and angular displacements, and are used to absorb vibrations and reduce noises in heating displacements and mechanical displacements of pipelines, equipment and systems.

Expansion joints are two kinds of flexible structures arranged on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. As two kinds of elastic compensating elements that can expand freely, it has the advantages of reliable operation, good performance and compact structure, and has been widely used in chemical industry, metallurgy, nuclear energy and other departments.

The existing submerged arc furnace includes a copper tile, an electrode is arranged on one side of the copper tile, and an expansion joint is arranged on the other side of the copper tile. The expansion joint is filled with hydraulic oil, and the expansion joint is pushed by the hydraulic oil to make the expansion joint elongation. The expansion joint is connected to the motor. When the expansion joint is extended, it can push the copper tile to touch the electrode, so as to realize the conduction of the circuit. The submerged arc furnace based on the above structure uses hydraulic oil as the working medium, and its working principle is similar to For single-acting oil cylinders, the working medium of the expansion joint of this structure is in a high temperature state for a long time, which leads to leakage and failure of the contraction force of the expansion joint.

Utility model content

In view of the above technical problems, the utility model proposes an expansion joint, which has a compact structure, convenient installation and long service life.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

An expansion joint, the expansion joint includes an expansion joint body and connecting flanges installed at both ends of the expansion joint, the expansion joint body includes a left connecting sleeve, a right connecting sleeve, an inner sleeve, an outer sleeve, and a spring tube and expansion pipe, the inner sleeve is set inside the right connecting sleeve, the right connecting sleeve is connected to the right flange of the expansion joint, the left connecting sleeve is connected to the left flange of the expansion joint, the right end of the left connecting sleeve and the right connecting sleeve The left ends of the sleeves are engaged with each other, the outer sleeve is set on the outside of the left sleeve and the right sleeve, the spring tube covers the outer sleeve, and the expansion joint is equipped with an expansion tube made of spring steel. There is a compartment for the circulation of cooling liquid between the outer walls of the spring tube, and a liquid inlet pipe and a liquid outlet pipe connected to the compartment are provided on the connecting flange; the outer sleeve is made of rubber material, and it is set on the left joint. The sleeve and the right side are connected to the outside of the sleeve, and an expansion gap is left.

The right connecting sleeve is connected to the right flange of the expansion joint, and the left connecting sleeve is connected to the left flange of the expansion joint. The left and right connecting sleeves have the same inner diameter and are made of heat-resistant materials. And leave an expansion gap.

The spring tube is made of spring steel and its outer layer is wrapped with rubber, rolled into a spring shape, and put on the outside of the outer sleeve to fasten the outer sleeve.

The left connecting sleeve and the right connecting sleeve adopt one or a combination of polyphenylene sulfide plastics, polytetrafluoroethylene tubes or glass fiber tubes.

The expansion tube is fixedly connected with a flange through a bolt fastener.

The beneficial effects of the utility model are:

The utility model is easy to install and has a compact structure. The left connecting sleeve and the right connecting sleeve are made of heat-resistant materials, which improves the high temperature resistance of the equipment. chamber, and the flange is provided with a liquid inlet pipe and a liquid outlet pipe. During operation, the cooling liquid can enter the main body of the expansion joint through the liquid inlet pipe, and through heat exchange, the cooling liquid flows out through the liquid outlet pipe, thereby realizing cooling of the expansion joint. The expansion joint works under the condition of continuous cooling of circulating water, which reduces the workload of maintenance, improves the service life of the expansion joint, reduces the operating cost of the expansion joint, and effectively solves the problem of failure of the expansion joint due to high temperature.

Description of drawings

Fig. 1 is the structural representation of the utility model expansion joint;

Fig. 2 is the side view of Fig. 1;

Among them, 1-expansion joint left flange; 2-expansion joint right flange; 3-inner sleeve; 4-left sleeve; 5-right sleeve; 6-outer sleeve; 7-spring tube; Expansion tube; 9-compartment cavity; 10-liquid inlet pipe; 11-liquid outlet pipe.

Detailed ways

The technical solution of the utility model will be described in further detail below in conjunction with the accompanying drawings of the description.

As shown in Figure 1 and Figure 2, an expansion joint, the expansion joint includes an expansion joint body and connecting flanges installed at both ends of the expansion joint, the expansion joint body includes a left connecting sleeve 4 and a right connecting sleeve 5 , the inner sleeve 3, the outer sleeve 6, the spring tube 7 and the expansion tube 8, the inner sleeve 3 is set inside the right connecting sleeve 5, the right connecting sleeve 5 is connected to the right flange 2 of the expansion joint, and the left connecting The sleeve is connected to the left flange 1 of the expansion joint, the right end of the left sleeve 4 and the left end of the right sleeve 5 are engaged with each other, the outer sleeve 6 is set outside the left sleeve 4 and the right sleeve 5, and the spring The tube 7 covers the outer sleeve 6. An expansion tube 8 made of spring steel is provided outside the expansion joint. A compartment 9 for cooling liquid circulation is provided between the inner wall of the expansion tube 8 and the outer wall of the spring tube 7. A liquid inlet pipe 10 and a liquid outlet pipe 11 communicating with the compartment 9 are provided; the outer sleeve 6 is made of rubber material, and is sleeved on the outside of the left sleeve 4 and the right sleeve 5, leaving a gap for expansion gap.

As a further optimization of the technical solution of the present utility model, the right connecting sleeve is connected to the right flange of the expansion joint, the left connecting sleeve is connected to the left flange of the expansion joint, and the left and right connecting sleeves have the same inner diameter and are made of heat-resistant material, the connection is zigzag and leaves an expansion gap.

As a further preference of the technical solution of the present invention, the spring tube is made of spring steel and wrapped with rubber, rolled into a spring shape, put on the outside of the outer sleeve, and fastened to the outer sleeve.

Finally, it should be noted that: the above embodiments are only used to illustrate the utility model rather than limit the technical solution described in the utility model; therefore, although the description has described the utility model in detail with reference to the above-mentioned various embodiments, Those of ordinary skill in the art should understand that the utility model can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the claims of the utility model .

Claims (5)

1. a kind of expansion joint, it is characterised in that：The expansion joint includes expansion joint ontology and the connection mounted on expansion joint both ends Flange, the expansion joint ontology include left female connector cylinder, right female connector cylinder, inner sleeve, outer sleeve, bourdon tube and expansion tube, described Inner sleeve is sleeved on the right side and connects sleeve inner, and the right side connects the right flange of sleeve connection expansion joint, and a left side connects the left flange of sleeve connection expansion joint, and a left side connects The right part of sleeve and the intermeshing of the left part of right female connector cylinder, outer sleeve is sleeved on left female connector cylinder and the right side connects cartridge exterior, spring Pipe sleeve lives outer sleeve, is equipped with expansion tube made of spring steel outside expansion joint, is set between the inner wall and spring pipe outer wall of expansion tube There is the separate space led to for cooling liquid stream, the inlet tube and outlet tube being connected with the separate space are provided on connecting flange；Housing Cylinder is made of rubber material, is sleeved on left female connector cylinder and the right side connects cartridge exterior, and there are expansion clearances.

2. expansion joint according to claim 1, it is characterised in that：The right side connects the right flange of sleeve connection expansion joint, and a left side connects The left flange of sleeve connection expansion joint, left female connector cylinder and the right side connect that sleeve diameter is identical and be made of heat proof material, and junction is at saw Dentation engages and there are expansion clearances.

3. expansion joint according to claim 1, it is characterised in that：Outer layer covers rubber is made by spring steel in the bourdon tube Glue is rolled into spring-like, is sleeved on outside outer sleeve, fastening outer sleeve cylinder.

4. expansion joint according to claim 2, it is characterised in that：The left female connector cylinder and right female connector cylinder use polyphenylene sulfide One or both of plastics, polyfluortetraethylene pipe or fiberglass tubes combine.

5. expansion joint according to claim 1, it is characterised in that：The expansion tube is fastened by bolts part and flange is fixed Connection.