Metal compensator

Abstract

The utility model discloses a metal compensator which comprises a corrugated pipe, an outer sheath arranged outside the corrugated pipe and two flow guide pipes arranged inside the corrugated pipe, the two flow guide pipes are respectively bent to be provided with plug bush parts sleeved at the two ends of the corrugated pipe, the two ends of the corrugated pipe are provided with connecting rings connected to the outer sides of the plug bush parts, and the two ends of the corrugated pipe are connected with the outer sheath. The locking cover is connected to the connecting ring in a threaded mode and presses the inserting and sleeving part, so that the inserting and sleeving part can be prevented from being separated from the corrugated pipe, fixed connection between the corrugated pipe and the flow guide pipe is achieved, detachable installation and connection between the two flow guide pipes and the corrugated pipe are achieved through the technical scheme, installation and fixation are reliable, connection strength is good, and the service life of the flow guide pipe is prolonged. The traditional welding mode is avoided, the mounting process is simplified, the mounting efficiency is improved, the later maintenance of the flow guide pipe and the corrugated pipe is facilitated, the flow guide pipe and other parts can be replaced, the waste of product resources is avoided, the use is more environment-friendly, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compensators, in particular to a metal compensator. Background Art

[0002] A bellows compensator is an expansion joint made of metal bellows and is a crucial component in connecting pipelines in modern industrial equipment. It can expand and contract along its axis, while also allowing for a small amount of bending. Its operating principle is to utilize its elastic expansion and contraction properties to compensate for axial, angular, lateral, and combined displacements of the pipeline caused by thermal and mechanical deformation and various mechanical vibrations.

[0003] The existing bellows compensator mainly includes a bellows, an outer mesh sleeve, a guide tube and a quick-connect ring. The bellows is a thin-walled elastic element that mainly plays the role of vibration attenuation; the outer mesh sleeve is installed on the outside of the bellows to protect the bellows. This guide tube plays the role of protecting the bellows and guiding the flow. There are two guide tubes installed in the bellows. One end of the two guide tubes is welded to the two ends of the bellows respectively, and can move relative to each other along the axial direction when the bellows is axially compensated. However, the existing bellows compensator still has the following problems in actual use: the welding process between the guide tube and the bellows is complicated, the installation is relatively cumbersome, the installation efficiency is low, and the maintenance of the guide tube in the later stage is difficult, resulting in the scrapping of the entire product and a waste of resources. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art of complex welding process between the guide pipe and the bellows, cumbersome installation, low installation efficiency, and difficulty in maintaining the guide pipe in the later stage.

[0005] In order to solve the above technical problems, the utility model provides a metal compensator, including a bellows and an outer sheath arranged on the outside of the bellows, and two guide tubes arranged inside the bellows, the two guide tubes are respectively connected to the two ends of the bellows, and a guide channel is formed between the two guide tubes, the two guide tubes are respectively bent and provided with a plug-in sleeve portion that is sleeved on the two ends of the bellows, and the two ends of the bellows are provided with connecting rings connected to the outside of the plug-in sleeve portion, and also include a locking cover connected to the connecting ring through a threaded structure and pressing the plug-in sleeve portion, when the locking cover is fixed with the connecting ring, the plug-in sleeve portion is surrounded and limited on one end of the bellows.

[0006] In the above-mentioned metal compensator, the insert portion is formed by folding one end of the guide tube outward, and the other ends of the two guide tubes are relatively extended and arranged in the bellows to form a movable connection.

[0007] In the above-mentioned metal compensator, the cross-sectional shape of the insert sleeve portion is L-shaped, and a connecting groove suitable for being sleeved on one end of the corrugated pipe is formed between one end of the guide tube and the insert sleeve portion.

[0008] In the above-mentioned metal compensator, a ring-shaped limiting groove is formed between the connecting ring and the bellows, and the inserting sleeve is matched and inserted into the limiting groove.

[0009] In the above-mentioned metal compensator, the locking cover includes a horizontal cover body portion threadedly connected to the connecting ring, a vertical cover body portion vertically connected to the horizontal cover body portion, and a through hole arranged on the vertical cover body portion and connected to the guide pipe. When the locking cover is fixed, the vertical cover body portion presses the socket portion and abuts against one end of the connecting ring.

[0010] In the above-mentioned metal compensator, the thread structure includes an external thread portion provided on the outer side wall of the coupling ring, and an internal thread portion provided on the inner side wall of the transverse cover portion and cooperating with the external thread portion.

[0011] In the above-mentioned metal compensator, the outer sheath is a metal braided mesh sheath, and the two ends of the outer sheath are respectively connected and fixed on two connecting rings.

[0012] In the above-mentioned metal compensator, the other ends of the two guide pipes have different diameters, one larger than the other. The other ends of the two guide pipes are sleeved and connected in the bellows, with a movable gap left between them.

[0013] Compared with the existing technology, the technical solution of this utility model has the following advantages:

[0014] The cam is fastened to the end of the sleeve so that the cam is in a position to move relative to the sleeve when the cam is in a position to move relative to the sleeve, thereby preventing the cam from being disengaged from the sleeve and preventing the cam from being loosened.

[0015] 2. In the metal compensator provided by the present invention, the plug-in sleeve is formed by folding outward from one end of the guide tube, and its cross-sectional shape is L-shaped. With this structural arrangement, the guide tube is matched with the plug-in sleeve and is accommodated in the limiting groove formed between the connecting ring and the bellows. The limiting groove plays a limiting connection role for the plug-in sleeve at one end of the bellows, so that the guide tube and one end of the bellows are plugged in and matched, and then the locking cover is tightened to lock the plug-in sleeve at one end of the bellows, thereby pressing the plug-in sleeve to be installed in the limiting groove, and playing a limiting and stopping role for the plug-in sleeve mounted on one end of the bellows. The installation and locking effect is good to prevent the guide tube wave from being separated from the bellows, and the matching and fixation are reliable, and the installation stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific implementation or the description of the prior art.

[0017] Figure 1 A schematic diagram of a half-section structure of a metal compensator provided by the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of a partially enlarged structure of a metal compensator is shown;

[0019] Figure 3 A schematic diagram of the partial connection structure of the bellows and the connecting ring of the present invention.

[0020] Explanation of the accompanying drawings: 1. Outer sheath; 2. Bellows; 3. Flow guide tube; 4. Insert sleeve; 5. Connecting ring; 6. Locking cover; 61. Horizontal cover body; 62. Vertical cover body; 7. Limiting groove. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components.

[0024] Example

[0025] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0026] This embodiment provides Figure 1-3 The metal compensator shown includes a bellows 2 and an outer sheath 1 arranged on the outside of the bellows 2, and two guide tubes 3 arranged inside the bellows 2. The two guide tubes 3 are respectively connected to the two ends of the bellows 2, and a guide channel is formed between the two guide tubes 3. The two guide tubes 3 are respectively bent and provided with a socket part 4 that is sleeved on the two ends of the bellows 2. The two ends of the bellows 2 are provided with a connecting ring 5 connected to the outside of the socket part 4, and also include a locking cover 6 connected to the connecting ring 5 through a threaded structure and pressing the socket part 4. When the locking cover 6 is fixed with the connecting ring 5, the socket part 4 is surrounded and limited on one end of the bellows 2.

[0027] The above embodiment is the core technical solution of this embodiment. The two guide tubes 3 are respectively connected to the two ends of the bellows 2 through the plug-in sleeve 4, so that the guide tube 3 and one end of the bellows 2 are plugged together. By providing two connecting rings 5 ​​at both ends of the bellows 2, the plug-in sleeve 4 is pressed when the locking cover 6 is threadedly connected to the connecting ring 5, and the plug-in sleeve 4 is surrounded and limited on one end of the bellows 2 by the cooperation of the locking cover 6 and the connecting ring 5. This can prevent the plug-in sleeve 4 from detaching from the bellows 2, thereby achieving a fixed connection between the bellows 2 and the guide tube 3. The two guide tubes 3 designed by this technical solution are detachable and connected to the bellows 2. The installation is reliable and the connection strength is good. The traditional welding method is avoided, the installation process is simplified, and the guide tube 3 and the bellows 2 are quickly installed and disassembled, which improves the installation efficiency, thereby facilitating the later maintenance of the guide tube and the bellows. Parts such as the guide tube can be replaced, avoiding waste of product resources, making it more environmentally friendly, reducing costs, and improving product performance and life.

[0028] The following combination Figure 1-3 The specific setting method of the diversion tube is described in detail:

[0029] The insert sleeve portion 4 is formed by folding one end of the guide tube 3 outward. The insert sleeve portion 4 and one end of the guide tube 3 are formed as an integral structure, with good overall stability and convenient molding and manufacturing. The other ends of the two guide tubes 3 are relatively extended and arranged in the bellows 2 to form a movable connection. Specifically, the diameters of the other ends of the two guide tubes 3 are set to be large and small, and the other ends of the two guide tubes 3 are sleeved and connected in the bellows 2, and a movable gap is left between the two. With this structural arrangement, the two guide tubes 3 in the bellows 2 not only play a role in guiding and insulating, but also can achieve relative movement according to the axial compensation of the compensator itself, that is, when the bellows 2 undergoes axial displacement, it will drive the two guide tubes 3 to move relative to each other, meet the axial compensation requirements of the product, and improve the service life and performance of the product.

[0030] The cross-sectional shape of the insert sleeve portion 4 is L-shaped, and a plug-in groove suitable for sleeve connection at one end of the bellows is formed between one end of the guide tube 3 and the insert sleeve portion 4. According to the connecting ring 5, it is fixed on one end of the bellows 2, and a ring-shaped limiting groove 7 is formed between the connecting ring 5 and the bellows 2, so that the insert sleeve portion 4 is matched and inserted into the limiting groove 7. With this structural arrangement, the guide tube 3 is matched and sleeved onto one end of the bellows through the insert sleeve portion 4, and is accommodated in the space formed between the connecting ring 5 and the bellows 2. The limiting groove 7 plays a limiting connection role for the plug-in sleeve part 4 at one end of the bellows through the limiting groove 7, so that the guide tube 3 is plugged into one end of the bellows 2, and then the locking cover 6 is tightened to lock the plug-in sleeve part 4 at one end of the bellows, thereby pressing the plug-in sleeve part 4 to be installed in the limiting groove 7, and playing a limiting and stopping role for the plug-in sleeve part 4 arranged on one end of the bellows, and having a good installation and locking effect to prevent the guide tube wave from being separated from the bellows, with reliable fit and good installation stability.

[0031] The following combination Figure 1-2 The specific setting method of the locking cover is described in detail:

[0032] The locking cover 6 includes a transverse cover body portion 61 threadedly connected to the connecting ring 5, a vertical cover body portion 62 vertically connected to the transverse cover body portion 61, and a through hole provided on the vertical cover body portion 62 and connected to the guide tube 3. As a specific structural setting, the threaded structure includes an external threaded portion provided on the outer wall of the connecting ring 5, and an internal threaded portion provided on the inner wall of the transverse cover body portion 61 and cooperating with the external threaded portion. The fast installation connection between the locking cover 6 and the connecting ring 5 is achieved by threaded connection. In addition, the vertical cover body portion 62 presses the plug-in sleeve 4 when the locking cover 6 is fixed and abuts against one end of the connecting ring 5, so that a limiting structure is formed between the vertical cover body portion 62 and the plug-in sleeve 4 to limit the plug-in sleeve 4 from axially disengaging from one end of the bellows 2. With this structural setting, the plug-in sleeve 4 is limited and pressed in the limiting groove 7 due to the extrusion of the locking cover 6 to prevent the plug-in sleeve 4 from disengaging from the bellows 2, and the installation stability is good. In addition, by removing the locking cover 6, the limiting effect on the socket part 4 can be released. At this time, the socket part 4 can be pulled out from the limiting groove, thereby realizing the disassembly and separation between the bellows 2 and the guide pipe 3, making it convenient to maintain or replace the guide pipe and the bellows, and easy to install and use.

[0033] In this embodiment, reference Figure 1 The bellows 2 is formed integrally by hydraulic molding from a double-layer metal bellows 2 embryo. Each layer of the metal bellows 2 has independent sealing properties, thereby increasing the thickness of the bellows 2 and enhancing the structural strength, which can compensate for the vibration and thermal deformation of the pipe or pipeline. The outer sheath 1 is a metal braided mesh sleeve, and the two ends of the outer sheath 1 are respectively connected and fixed to two connecting rings 5. The metal braided mesh sleeve of the bellows 2 provides a better protective effect. With this structural setting, when the two ends of the metal braided mesh sleeve are welded and fixed to the two connecting rings, the two ends of the steel wire braided mesh sleeve are tightened and stressed, which automatically forms an axial force, thereby effectively increasing the overall pressure bearing capacity of the steel wire mesh sleeve.

[0034] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A metal compensator, comprising a bellows (2) and an outer sheath (1) arranged outside the bellows (2), and two flow guide tubes (3) arranged inside the bellows (2), the two flow guide tubes (3) being connected to both ends of the bellows (2) respectively, and forming a flow guide channel between the two flow guide tubes (3), characterized in that: The two guide pipes (3) are respectively bent and provided with a sleeve portion (4) sleeved on both ends of the bellows (2); the two ends of the bellows (2) are provided with a connecting ring (5) connected to the outside of the sleeve portion (4); and a locking cover (6) connected to the connecting ring (5) through a threaded structure and pressing the sleeve portion (4); when the locking cover (6) is fixed with the connecting ring (5), the sleeve portion (4) is surrounded and limited on one end of the bellows (2).

2. A metal compensator according to claim 1, characterized in that: The inserting sleeve portion (4) is formed by folding one end of the guide tube (3) outwards, and the other ends of the two guide tubes (3) are relatively extended and arranged in the corrugated tube (2) to form a movable connection.

3. The metal compensator according to claim 2, characterized in that: The cross-section of the inserting sleeve portion (4) is L-shaped, and a connecting groove suitable for being sleeved on one end of the corrugated pipe (2) is formed between one end of the guide tube (3) and the inserting sleeve portion (4).

4. The metal compensator according to claim 3, characterized in that: A ring-shaped limiting groove (7) is formed between the coupling ring (5) and the corrugated pipe (2), and the inserting sleeve portion (4) is matched and inserted into the limiting groove (7).

5. A metal compensator according to any one of claims 1 to 4, characterized in that: The locking cover (6) comprises a transverse cover portion (61) threadedly connected to the connecting ring (5), a vertical cover portion (62) vertically connected to the transverse cover portion (61), and a through hole provided on the vertical cover portion (62) and connected to the flow guide pipe (3). When the locking cover (6) is fixed, the vertical cover portion (62) presses the insert portion (4) and abuts against one end of the connecting ring (5).

6. The metal compensator according to claim 5, characterized in that: The thread structure comprises an external thread portion provided on the outer side wall of the coupling ring (5), and an internal thread portion provided on the inner side wall of the transverse cover portion (61) and cooperating with the external thread portion.

7. The metal compensator according to claim 1, characterized in that: The outer sheath (1) is a metal braided mesh sheath, and the two ends of the outer sheath (1) are respectively connected and fixed on two connecting rings (5).

8. The metal compensator according to claim 1, characterized in that: The other ends of the two guide pipes (3) have a diameter of one large and one small. The other ends of the two guide pipes (3) are sleeved and connected in the bellows (2), and a movable gap is left between the two. The bellows (2) is hydraulically formed from a double-layer metal bellows (2) embryo.

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