Heat preservation type sleeve compensator

Abstract

A heat preservation type sleeve compensator is used for compensating thermal expansion and cold contraction of a hot water pipeline. The utility model relates to a pipe fitting, which comprises an outer pipe (4) and an inner pipe (16) inserted in the outer pipe, and is characterized in that a second annular plate (9) is welded on the inner wall of the right part of the outer pipe, a sleeve (14) made of a flexible material is sleeved on the inner pipe, the left end of the sleeve is fixed on the inner pipe through a hoop (13), a flange (15) at the right end of the sleeve is pressed on the second annular plate by a pressing plate (10), the outer diameter of the pressing plate is equal to that of the outer pipe, and the outer diameter of the pressing plate is equal to that of the outer pipe. The edge of the right end of the pressing plate is connected with the large head end of a conical shell (12), and the small head end of the shell extends to form a pipe body (17). And the surface of the sleeve compensator is coated with a thermal insulation layer (5). The sleeve compensator has the advantages that a flange on the outer pipe is omitted, the conical shell is arranged on the pressing plate, the outer surface of the sleeve compensator is in smooth transition, and wrapping of a heat preservation layer is facilitated; and 2, the sealing element is a sleeve made of a flexible material, and the friction between the sleeve and the inner pipe is very small, so that even if the sleeve is abraded, the sealing performance can still be kept as long as the pipe wall is not abraded.

Description

Technical Field

[0001] The utility model relates to a sleeve compensator, which is used to compensate the thermal expansion and contraction of hot water pipelines. Background Art

[0002] The structure of a thermal insulation sleeve compensator generally includes an outer pipe and an inner pipe. The outer pipe is wrapped with thermal insulation materials. A sealing filler is provided between the outer pipe and the inner pipe. The sealing component is in contact with the gland. The flange of the gland is connected to the flange of the outer pipe by bolts. Tightening the bolts can compress the sealing filler.

[0003] This kind of thermal insulation sleeve compensator with such a structure has some deficiencies. 1. Since the diameter of the flange is much larger than the diameters of the outer pipe and the inner pipe, there is no chamfer transition between the flange and the outer pipe, and it is inconvenient to wrap the thermal insulation materials. 2. The sealing filler will wear, and the sealing period is short. Every time the sealing performance is maintained, the thermal insulation materials need to be peeled off to maintain the sealing performance (by tightening the bolts to compress the sealing filler again), resulting in a large consumption of thermal insulation materials. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a thermal insulation type sleeve compensator. This sleeve compensator cancels the flange, and the change in the outer surface diameter of the sleeve compensator is a smooth transition, which is convenient for wrapping the thermal insulation materials. When the sleeve compensator is operating, the wear of the sealing element is very small. Even if the sealing element wears, it can still maintain the sealing performance, the sealing period is long, and the consumption of thermal insulation materials is small.

[0005] The technical solution of the utility model is a thermal insulation type sleeve compensator, which includes an outer pipe 4. An inner pipe 16 is inserted into the outer pipe. The feature is that a second ring plate 9 is welded on the inner wall of the right part of the outer pipe. The second ring plate sleeves on the inner pipe. A sleeve 14 made of flexible material sleeves on the inner pipe. The left end of the sleeve is fixed on the inner pipe by a clamp 13. The right end of the sleeve has a flanging 15. The left end face of the flanging is in contact with the second ring plate. The right end face of the flanging is in contact with an annular pressing plate 10. The pressing plate 10 sleeves on the inner pipe. The pressing plate is screwed on the second ring plate through bolts 8. The outer diameter of the pressing plate is equal to the outer diameter of the outer pipe. A connecting pipe 1 is hermetically connected to the left end of the outer pipe 4 through a reducing pipe 2. The big end of a conical housing 12 is connected to the right end edge of the pressing plate 10. A pipe body 17 extends from the small end of the housing. A thermal insulation layer 5 is wrapped on the connecting pipe 1, the reducing pipe 2, the outer pipe 4, the outer circle of the pressing plate, and the housing 12 and the pipe body 17.

[0006] Compared with the prior art, the beneficial effects of the utility model are: 1. The flange on the outer tube is eliminated, and a conical shell is provided on the pressure plate. The outer surface of the sleeve compensator has a smooth transition, which is convenient for wrapping the insulation layer, and the thickness of the insulation layer is uniform, avoiding waste of insulation materials; the tube body 17 at the right end of the shell is sleeved on the inner tube, so that the insulation layer has no contact with the inner tube, and there is no friction between the inner tube and the insulation layer when the inner tube moves axially; 2. The sealing element is a sleeve 14 made of flexible material. When the inner tube moves relative to the outer tube, the sleeve 14 expands and contracts accordingly, and the friction between the sleeve and the inner tube is very small. Even if the sleeve 14 is worn, as long as the tube wall is not worn, the sealing performance can still be maintained. The sealing cycle is much longer than the prior art, and the consumption of insulation materials is less. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model.

[0008] The symbols in the accompanying drawings respectively represent: 1-connecting pipe, 2-reducing pipe, 3-first ring plate, 4-outer pipe, 5-insulation layer, 6-shell, 7-inner thread seat, 8-bolt, 9-second ring plate, 10-pressure plate, 11-screw, 12-shell, 13-clamp, 14-sleeve, 15-flange, 16-inner pipe, 17-tube body. DETAILED DESCRIPTION

[0009] The specific implementation of the utility model is now described in conjunction with the accompanying drawings.

[0010] A heat-insulating sleeve compensator, comprising an outer tube 4, an inner tube 16 is inserted into the outer tube, a second ring plate 9 is welded on the inner wall of the right part of the outer tube, the second ring plate is sleeved on the inner tube, a sleeve 14 of a flexible material is sleeved on the inner tube, the flexible material is high-temperature resistant silicone rubber or EPDM rubber, the left end of the sleeve is fixed to the inner tube by a clamp 13, the right end of the sleeve has a flange 15, the left end face of the flange is in contact with the second ring plate 9, the right end face of the flange is in contact with the annular pressure plate 10, the pressure plate is screwed on the second ring plate by bolts 8, the pressure plate 1 0 is sleeved on the inner tube; the outer diameter of the pressing plate is equal to the outer diameter of the outer tube, the connecting pipe 1 is sealed and connected to the left end of the outer tube 4 through the reducer 2, and the right end of the pressing plate 10 is provided with a conical shell 12, the large head end flange on the shell is connected to the edge of the pressing plate through a screw 11, the large head end diameter of the shell is equal to the outer diameter of the pressing plate, and the right end (small head end) of the shell is extended with a tube body 17; the connecting pipe 1, the reducer 2, the outer tube 4, the outer circle of the pressing plate, the shell 12 and the tube body 17 are wrapped with an insulation layer 5, and the insulation layer is a polyurethane foam or a rubber and plastic sponge material.

[0011] In order to prevent the thermal insulation layer from being damaged by foreign matter, a protective shell 6 made of a metal sheet is covered on the thermal insulation layer.

[0012] To prevent the fluid medium from leaking along the bolts, a blind hole internal thread seat 7 is seal-welded on the left side of the second ring plate, and the bolts are screwed into the internal thread seat.

[0013] To prevent the inner tube from moving in the outer tube and deviating from the axis, a first ring plate 3 is welded to the left end of the outer tube, and the inner tube is fittingly inserted into the first ring plate.

[0014] During use, the connecting pipe is connected to one end face of the pipeline, and the extending end of the inner tube is connected to the other cross-section of the pipeline.

Claims

1. Thermal insulation sleeve compensator, which includes an outer pipe (4) with an inner pipe (16) inserted therein, characterized in that, On the inner wall of the right part of the outer pipe, a second ring plate (9) is welded. The second ring plate sleeves on the inner pipe. A sleeve (14) made of flexible material is sleeved on the inner pipe. The left end of the sleeve is fixed on the inner pipe through a clamp (13). The right end of the sleeve has a flanging (15). The left end face of the flanging is in contact with the second ring plate, and the right end face of the flanging is in contact with an annular pressing plate (10). The pressing plate is screwed on the second ring plate through bolts (8); the outer diameter of the pressing plate is equal to the outer diameter of the outer pipe. A connecting pipe (1) is hermetically connected to the left end of the outer pipe (4) through a reducing pipe (2). The big end of a conical housing (12) is connected to the right end edge of the pressing plate (10). A pipe body (17) extends from the small end of the housing; a heat insulation layer (5) is wrapped on the connecting pipe, the reducing pipe, the outer pipe, the outer circle of the pressing plate and the housing (12) and the pipe body (17).

2. The thermal insulation type sleeve compensator according to claim 1, characterized in that, A casing (6) made of a thin metal plate is covered on the heat insulation layer.

3. The thermal insulation type sleeve compensator according to claim 1, characterized in that, An internally threaded seat (7) with a blind hole is hermetically welded on the left side face of the second ring plate (9). The bolt is screwed in the internally threaded seat.

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