Heat preservation type rotary compensator

Abstract

The heat preservation type rotary compensator is used for compensating thermal expansion and cold contraction of a hot water pipeline. The connecting pipe (1), the reducer pipe (2) and the outer pipe (4) are connected in sequence, a cylinder body (5) is inserted in the inner wall of the outer pipe in a matched mode, a sealing ring (6) is arranged between the cylinder body and the outer pipe, an inner pipe (13) penetrates through the cylinder body, sealing filler (12) is arranged between the inner pipe and the cylinder body, the left end of the sealing filler is attached to the cylinder bottom (11) of the cylinder body, and the right end of the sealing filler is attached to a pressing sleeve (14). The flange on the pressing sleeve is connected with the cylinder body through a bolt (15); the right end of the outer pipe is connected with a conical shell (16), and the connecting pipe, the reducer pipe, the outer pipe and the shell are wrapped with heat preservation layers (7). The rotary compensator has the advantages that a flange on the outer pipe is omitted, the conical shell is connected to the outer pipe, all the sections of the outer surface of the rotary compensator are in smooth transition and free of edges and corners, wrapping of a heat preservation layer is facilitated, wrapping of the heat preservation layer is tight, and the heat preservation effect is improved.

Description

Technical Field

[0001] The utility model relates to a rotary compensator for compensating the thermal expansion and contraction of hot water pipelines. Background Art

[0002] The structure of a heat-insulating rotary compensator generally includes an outer pipe and an inner pipe. The outer pipe is wrapped with heat-insulating 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] For the heat-insulating rotary compensator with such a structure, there are some deficiencies. Since the diameter of the flange is much larger than that of the outer pipe and the inner pipe, there is no bevel transition between the flange and the outer pipe. Coupled with the bolts protruding from the flange, there are too many edges and corners on the outer surface of the rotary compensator, and the heat-insulating materials are not tightly wrapped, resulting in poor heat-insulating effect. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a heat-insulating rotary compensator in which the change of the outer surface diameter is smoothly transitioned, facilitating the wrapping of heat-insulating materials and improving the heat-insulating performance.

[0005] The technical solution of the utility model is a heat-insulating rotary compensator, which includes an outer pipe 4. The left end of the outer pipe is hermetically welded to the large end of a reducing pipe 2. The small end of the reducing pipe is hermetically welded to a connecting pipe 1. An inner pipe 13 extends into the outer pipe. It is characterized in that a cylinder 5 is inserted into the inner wall of the outer pipe in a matching manner. A sealing ring 6 is provided between the cylinder and the outer pipe. The inner pipe 13 passes through the cylinder. A sealing filler 12 is provided between the inner pipe and the cylinder. The left end of the sealing filler is in contact with the bottom 11 of the cylinder. The right end of the sealing filler is in contact with a gland sleeve 14. The flange on the gland sleeve is connected to the cylinder by bolts 15. A key body 8 is provided between the flange on the gland sleeve and the outer pipe. The right end of the outer pipe is connected to the large end of a conical housing 16. The small end of the housing 16 is sleeved on the inner pipe. A heat-insulating layer 7 is wrapped on the connecting pipe, the reducing pipe, the outer pipe and the housing.

[0006] Compared with the prior art, the beneficial effect of the utility model is that the flange on the outer pipe is cancelled, and a conical housing is connected to the outer pipe. The outer surfaces of each section of the rotary compensator are smoothly transitioned without edges and corners, facilitating the wrapping of the heat-insulating layer. The heat-insulating layer is tightly wrapped, improving the heat-insulating effect. Brief Description of the Drawings

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

[0008] Figure 2 It is Figure 1 the enlarged view of part C of

[0009] The symbols in the accompanying drawings respectively represent: 1-connecting pipe, 2-reducing pipe, 4-outer pipe, 5-cylinder, 6-sealing ring, 7-insulation layer, 8-key body, 9-spring washer, 10-shield, 11-cylinder bottom, 12-sealing packing, 13-inner pipe, 14-pressing sleeve, 15-bolt, 16 shell. DETAILED DESCRIPTION

[0010] The specific implementation of the utility model is now described in conjunction with the accompanying drawings.

[0011] A heat-insulating rotary compensator comprises an outer tube 4, the left end of which is sealed and welded to the large end of a reducer 2, the small end of the reducer is sealed and welded to a connecting pipe 1, and an inner tube 13 extends into the outer tube.

[0012] A cylinder 5 is inserted into the inner wall of the outer tube in a matching manner, a sealing ring 6 is arranged between the cylinder and the outer tube, an inner tube 13 passes through the cylinder, a sealing packing 12 is arranged between the inner tube and the cylinder, the left end of the sealing packing is in contact with the cylinder bottom 11 of the cylinder, the right end of the sealing packing is in contact with the pressing sleeve 14, and the flange on the pressing sleeve is connected to the cylinder through bolts 15; the bolts are screwed on the wall of the cylinder, and a spring washer 9 or a spring is arranged between the flange on the pressing sleeve and the hexagonal part of the bolt 15. With such a structure, the sealing packing can be compressed in both directions when the bolts are tightened, and the two ends of the sealing packing are evenly compressed, which can improve the sealing effect; the spring washer or spring can automatically compress the sealing packing to compensate for the wear of the sealing packing.

[0013] In order to prevent relative rotation between the cylinder and the outer tube (relative rotation between the cylinder and the outer tube will cause wear of the sealing ring), a key body 8 is provided between the flange on the pressing sleeve and the outer tube.

[0014] The right end of the outer tube is connected to the large end of the conical shell 16, and the small end of the shell 16 is sleeved on the inner tube. The shell is made of metal sheet, and an inner stop extends from the large end of the shell. The right end of the outer tube has an outer stop, and the inner stop of the shell is welded on the outer stop of the outer tube.

[0015] The connecting pipe, the reducer, the outer pipe and the shell are wrapped with a heat-insulating layer 7, which is a polyurethane foam or a rubber-plastic sponge material.

[0016] In order to prevent the thermal insulation layer from being damaged by foreign matter, a protective cover 10 made of a metal sheet is covered on the thermal insulation layer.

Claims

1. Thermal insulation type rotary compensator, which comprises an outer pipe (4), the left end of the outer pipe is hermetically welded to the large end of a reducer pipe (2), the small end of the reducer pipe is hermetically welded to a connecting pipe (1), and an inner pipe (13) extends into the outer pipe. It is characterized in that, A cylinder body (5) is inserted in a fitting manner on the inner wall of the outer pipe. A sealing ring (6) is arranged between the cylinder body and the outer pipe. An inner pipe (13) passes through the cylinder body. A sealing packing (12) is arranged between the inner pipe and the cylinder body. The left end of the sealing packing is in contact with the bottom (11) of the cylinder body of the cylinder body. The right end of the sealing packing is in contact with a gland (14). The flange on the gland is connected to the cylinder body through bolts (15). The right end of the outer pipe is connected to the large end of a conical housing (16). The small end of the housing (16) is sleeved on the inner pipe. A heat insulation layer (7) is wrapped on the connecting pipe, the reducing pipe, the outer pipe and the housing.

2. The thermal insulation type rotary compensator according to claim 1, characterized in that, A key body (8) is arranged between the flange on the gland and the outer pipe.

3. The thermal insulation type rotary compensator according to claim 1, characterized in that, A shield (10) made of a metal sheet is covered on the heat insulation layer.

Images