Corrugated compensator

Abstract

The utility model discloses a ripple compensator, and belongs to the technical field of compensation elements. The corrugated pipe comprises inner connecting pipes, inner corrugated pipes, end discs and outer corrugated pipes, and the two sides of each inner corrugated pipe are connected with the two corresponding inner connecting pipes in a sealed mode to form a flow channel for a medium to flow; the outer corrugated pipe is sleeved outside the inner corrugated pipe and is hermetically connected with the two end discs; and the end discs are sleeved outside the inner connecting pipe and are hermetically connected with the inner connecting pipe. In the normal working state, the corrugated compensator guides flow through the inner corrugated pipe, the outer corrugated pipe is located outside the inner corrugated pipe, the inner corrugated pipe can be protected, the service life of the inner corrugated pipe is prolonged, and therefore the service life of the corrugated compensator is prolonged; when the inner corrugated pipe is damaged due to fatigue, corrosion and the like, due to the fact that the outer corrugated pipe is connected with the end disc in a sealed mode, and the end disc is connected with the inner connecting pipe in a sealed mode, medium leakage of the corrugated compensator can be avoided, and the flow guide function of the corrugated compensator can still be achieved under the action of the outer corrugated pipe.

Description

Technical Field

[0001] The present application belongs to the technical field of compensation components, and in particular, relates to a corrugated compensator. Background Art

[0002] Bellows compensator is a kind of compensation element. It utilizes the effective expansion and contraction of its working body, the bellows, to absorb the dimensional changes of pipelines, ducts, containers, etc. caused by thermal expansion and contraction, or to compensate for the axial, lateral and angular displacement of pipelines, ducts, containers, etc. It can also be used to reduce noise and vibration, and is widely used in modern industry.

[0003] In the related art, as the use time of the bellows compensator increases, impurities in the medium are easily deposited and scaled in the troughs of the bellows. When the bellows is bent, the scale is easy to puncture the bellows, causing the bellows to crack. In addition, the bellows in the bellows compensator are also prone to cracking due to fatigue, corrosion from the medium, or damage from the impact of the medium, which makes the bellows compensator unable to continue to be used and the service life of the bellows compensator is short. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem that the corrugated compensator in the related art is easily damaged. To this end, the present application provides a corrugated compensator.

[0005] An embodiment of the present application provides a corrugated compensator, comprising:

[0006] Two internal pipes, the two internal pipes are arranged opposite to each other;

[0007] An inner bellows is located between the two inner tubes, and the two ends of the inner bellows along the axial direction are respectively closely connected to the two inner tubes;

[0008] Two end plates are respectively sleeved on the two inner tubes and are tightly connected to the inner tubes;

[0009] The outer bellows is sleeved outside the inner bellows and located between the two end plates, and its two ends along the axial direction are respectively and tightly connected to the two end plates; the inner bellows, the inner pipe, the end plates and the outer bellows together form a closed chamber.

[0010] In some embodiments, the inner diameter of the inner bellows is greater than or equal to the inner diameter of the inner tube, and the outer diameter of the inner bellows is smaller than the inner diameter of the outer bellows.

[0011] In some embodiments, the wave height of the inner bellows is 4-6 mm; the wave height of the outer bellows is 30-50 mm.

[0012] In some embodiments, the inner bellows, the outer bellows and the inner tube are coaxially arranged.

[0013] In some embodiments, the corrugated compensator also includes two external tubes, which are respectively sleeved on the two internal tubes. Along the axial direction of the internal tubes, the two external tubes are respectively located on both sides of the external bellows and are tightly connected to the external tubes and the end plate; the inner bellows, the inner tube, the end plate, the external tube and the outer bellows together form the chamber.

[0014] In some embodiments, the inner bellows is welded to the inner tube, and the outer bellows is welded to the outer tube.

[0015] In some embodiments, a reinforcement ring is welded at a weld joint between the inner bellows and the inner tube, and / or a reinforcement ring is provided at a weld joint between the outer bellows and the outer tube.

[0016] In some embodiments, the outer tube is welded to the end plate, and the end plate is welded to the inner tube.

[0017] In some embodiments, along the circumference of the end plate, a plurality of avoidance through holes are spaced apart on the end plate, and the avoidance through holes on two end plates are arranged opposite to each other;

[0018] The corrugated compensator also includes a plurality of tie rods and nuts, the number of the tie rods is consistent with the number of avoidance holes on the end plates; the tie rods pass through the two end plates through the avoidance holes, the nuts are threadedly connected to the tie rods, and along the axial direction of the inner tube, the plurality of nuts are respectively located on both sides of the end plates.

[0019] In some embodiments, the corrugated compensator further includes a reinforcing plate, and the reinforcing plate is fixedly connected to the inner pipe and the end plate.

[0020] The utility model has at least the following beneficial effects:

[0021] The present application provides a bellows compensator, comprising an inner tube, an inner bellows, an end plate and an outer bellows, wherein the two sides of the inner bellows are respectively and tightly connected to the two inner tubes to form a flow channel for the flow of the medium; the outer bellows is sleeved outside the inner bellows and tightly connected to the two end plates, and the end plate is sleeved outside the inner tube and tightly connected to the inner tube, so that the inner bellows, the inner tube, the end plate and the outer bellows are surrounded to form a closed chamber.

[0022] In this way, under normal working conditions, the corrugated compensator of the present application guides the flow through the inner bellows, and the outer bellows is located outside the inner bellows, which can provide protection for the inner bellows to a certain extent, avoid the influence of the external environment on the inner bellows, extend the service life of the inner bellows, and thus improve the service life of the bellows compensator; when the inner bellows is damaged due to impurity deposition, scaling, fatigue, corrosion and the like, since the outer bellows and the end plate are tightly connected, and the end plate is tightly connected to the inner pipe, therefore, under the action of the outer bellows, the bellows compensator will not leak the medium, and under the action of the outer bellows, the bellows compensator can still realize the function of guiding the flow, so that the bellows compensator can continue to be used for a period of time, which extends the service life of the bellows compensator to a certain extent; in addition, the corrugated compensator of the present application can be used for both unidirectional and bidirectional flow of the medium. When it is installed on a pipeline, it helps to realize bidirectional transmission of the medium and facilitates the transmission of the medium.

[0023] In summary, the corrugated compensator of the present application improves the service life of the corrugated compensator to a certain extent through the design of two bellows, namely the inner bellows and the outer bellows, which helps to save the production cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a corrugated compensator in one or more embodiments of the present application is shown.

[0026] Figure 2 Shows Figure 1 Left view with tie rods and nuts hidden.

[0027] Figure numerals: 100 - bellows compensator, 100a - chamber, 110 - inner tube, 120 - inner bellows, 130 - end plate, 130a - avoidance hole, 140 - outer bellows, 150 - outer tube, 160 - reinforcement ring, 170 - pull rod, 180 - nut, 190 - reinforcement plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] The bellows in the bellows compensator is a component that is more easily damaged. As the bellows compensator is used for a longer time, impurities in the medium are easily deposited and scaled in the troughs of the bellows. When the bellows bends, the scale is easy to puncture the bellows, causing the bellows to crack. In addition, the bellows in the bellows compensator are also prone to cracking due to fatigue, corrosion from the medium, or damage from the impact of the medium, which makes the bellows compensator unable to continue to be used and the service life of the bellows compensator is short.

[0033] Therefore, in the related art, the corrugated compensator has the technical problem of being easily damaged. The embodiment of the present application provides a corrugated compensator, which can at least solve the technical problem of the corrugated compensator being easily damaged to a certain extent.

[0034] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0035] like Figure 1 and Figure 2 As shown, the bellows compensator 100 includes an inner bellows 120 , an outer bellows 140 , two inner tubes 110 and two end plates 130 .

[0036] The two inner tubes 110 are arranged opposite to each other, and the inner bellows 120 is located between the two inner tubes 110. The two ends of the inner bellows 120 along the axial direction are closely connected to the two inner tubes 110. In this way, the two inner tubes 110 are connected through the inner bellows 120, and the medium can flow from one inner tube 110 to the other inner tube 110. When the size changes in the pipeline due to thermal expansion and contraction, it is absorbed by the expansion and contraction deformation of the inner bellows 120 and the outer bellows 140. The medium can be liquid, gas, etc., which is not limited in this application.

[0037] The two end plates 130 are respectively sleeved on the two inner tubes 110 and are tightly connected to the inner tubes 110; the outer bellows 140 is sleeved outside the inner bellows 120 and is located between the two end plates 130, and its two ends along the axial direction are tightly connected to the two end plates 130. Since the inner bellows 120 and the two inner tubes 110 are tightly connected, the end plate 130 and the inner tubes 110 are tightly connected, and the outer bellows 140 and the end plate 130 are tightly connected, the inner bellows 120, the inner tube 110, the end plate 130 and the outer bellows 140 are tightly connected to form a tightly closed chamber 100a.

[0038] When the inner tube 110 is not damaged, the flow channel formed by the two inner tubes 110 and the inner bellows 120 is not connected to the chamber 100 a , and the medium in the flow channel will not enter the chamber 100 a .

[0039] The outer bellows 140 is sleeved on the outer side of the inner bellows 120, which can provide protection for the inner bellows 120, avoid or reduce the influence of the external environment on the inner bellows 120, such as water flow, air, etc., and to a certain extent extend the service life of the inner bellows 120, thereby improving the service life of the bellows compensator 100 of the present application.

[0040] Under normal working conditions, the bellows compensator 100 guides the flow through the inner bellows 120 and the two inner tubes 110. As the bellows compensator 100 is used for a longer time, the inner bellows 120 may be damaged by internal impurity deposition, scaling, medium corrosion, or fatigue. At this time, since the outer bellows 140 and the end plate 130 in the present application are tightly connected, and the end plate 130 is tightly connected to the inner tube 110, under the action of the outer bellows 140, the bellows compensator 100 will not leak the medium. The outer bellows 140 replaces the inner bellows 120 to connect the two inner tubes 110 and achieve the function of guiding the flow, so that the bellows compensator 100 can continue to be used for a period of time, further extending the service life of the bellows compensator 100 of the present application. Therefore, the bellows compensator 100 of the present application has the advantages of not being easily damaged and having a long service life, which helps to save the production cost of the enterprise.

[0041] It should be noted that the corrugated compensator 100 of the present application is installed between two pipes when in use. Specifically, the two inner pipes 110 are respectively and hermetically connected to the two pipes on one side away from the inner bellows 120 to connect the two pipes.

[0042] In some embodiments, the two inner tubes 110 are welded to the pipeline to connect the two pipelines; in some embodiments, in order to facilitate the connection of the corrugated compensator 100 of the present application to the pipeline, the two inner tubes 110 are provided with flanges on the side away from the inner bellows 120 to connect with the pipeline flange; in some embodiments, the two inner tubes 110 are provided with threaded connection parts on the side away from the inner bellows 120, for example, external threads are provided on the outer surface of the inner tube 110 or internal threads are provided on the inner surface to connect with the pipeline thread; in some embodiments, the two inner tubes 110 are provided with snap connection parts on the side away from the inner bellows 120 to connect with the pipeline snap-on.

[0043] It should be noted that the size of the internal pipe 110 is related to the size of the specific installed pipeline. The user can design the size of the internal pipe 110 according to the specific size of the pipeline. The size of the internal pipe 110 is not limited in this application.

[0044] The waveforms of the inner bellows 120 and the outer bellows 140 are not limited in the present application, and may be S-shaped, V-shaped, U-shaped, C-shaped, etc.

[0045] In order to ensure the flow rate of the medium in the bellows compensator 100 of the present application, in some embodiments, the inner diameter of the inner bellows 120 is greater than or equal to the inner diameter of the inner tube 110. Such a design helps to reduce the obstruction of the inner bellows 120 to the medium, and to a certain extent avoids the medium from hitting the inner bellows 120, causing a sudden change in the flow rate of the medium, causing medium turbulence and energy loss, so as to ensure the flow rate of the medium. At the same time, such a design also helps to prevent impurities in the medium from being deposited in the inner bellows 120, thereby increasing the service life of the inner bellows 120.

[0046] In some embodiments, the outer diameter of the inner bellows 120 is smaller than the inner diameter of the outer bellows 140 to avoid contact and interference between the inner bellows 120 and the outer bellows 140 during operation of the bellows compensator 100 of the present application, thereby ensuring continuous and stable operation of the bellows compensator 100 of the present application.

[0047] If the wave height of the corrugated tube is too large, it is easy to form a low-speed area in the trough, so that impurities in the medium are deposited in the trough, affecting the expansion and contraction of the bellows, and accelerating the corrosion of the bellows. Therefore, in some embodiments of the present application, the wave height of the inner bellows 120 is 4-6mm. Setting the wave height of the inner bellows 120 to 4-6mm can keep the flow velocity in the trough area of ​​the inner bellows 120 at a relatively large value, making it difficult for impurities to be deposited in the trough area, so that the corrugated compensator 100 of the present application can be used to conduct the medium with impurities; at the same time, it helps to reduce the obstruction of the inner bellows 120 to the medium and ensure the flow rate of the medium. In the case that the inner bellows 120 is not damaged, the outer bellows 140 can play a role in protecting the inner bellows. In these embodiments, the wave height of the outer bellows 140 is 30-50mm. Setting the wave height of the outer bellows 140 to be relatively large helps to improve the strength of the outer bellows 140, so that it can better protect the inner bellows 120. When the inner bellows 120 is damaged, the outer bellows 140 plays the role of connecting the two inner tubes 110. At this time, the wave height of the outer bellows 140 is 30-50mm. To a certain extent, compared with the inner bellows 120 with a wave height of 4-6mm, impurities are easily accumulated in the trough of the outer bellows 140; however, in these embodiments, the outer bellows 140 plays the role of temporary diversion, that is, when the staff detects that the bellows 120 is damaged, the bellows compensator 100 will be replaced in time. The outer bellows 140 will not be used for a long time. Even if its wave height is large, the amount of impurities deposited in a short time is small, and it is not enough to affect the expansion and contraction deformation of the bellows compensator 100. Therefore, in these embodiments, the wave height of the outer bellows 140 is set to 30-50mm, and the wave height of the inner bellows 120 is set to 4-6mm, which can provide better protection for the inner bellows 120 and extend the service life of the inner bellows 120.

[0048] When the inner bellows 120 is damaged, the resistance encountered by the medium at the inner bellows 120 will change, and the staff can determine whether the inner bellows 120 is broken by detecting parameters such as the flow rate of the pipeline medium.

[0049] It should be noted that the specific values ​​of the wave heights of the inner bellows 120 and the outer bellows 140 are not limited in the present application, and the user can make adaptive designs according to specific circumstances.

[0050] In some embodiments, the length of the inner bellows 120 and the length of the outer bellows 140 are both 200 mm, and both have 3-4 wave peaks.

[0051] In some implementations, the inner bellows 120, the outer bellows 140 and the inner tube 110 are coaxially arranged. Such a design facilitates installation and maintenance and helps to improve the stability of the connection.

[0052] In some embodiments, Figure 1 As shown, the bellows compensator 100 also includes two external tubes 150, which are respectively sleeved on the two internal tubes 110. Along the axial direction of the internal tube 110, the two external tubes 150 are respectively located on both sides of the external bellows 140, and are tightly connected to the external tube 150 and the end plate 130; the inner bellows 120, the inner tube 110, the end plate 130, the external tube 150 and the outer bellows 140 together form a chamber 100a.

[0053] That is, one of the external pipes 150 connects one side of the outer bellows 140 and the end plate 130 close to the side, and the other external pipe 150 connects the other side of the outer bellows 140 and the end plate 130 close to the other side. With this design, the external pipe 150 is tightly connected to the end plate 130 and the outer bellows 140, which indirectly realizes the tight connection between the outer bellows 140 and the end plate 130. After the external pipe 150 is provided, it helps to shorten the length of the outer bellows 140, which can facilitate the installation of the outer bellows 140, and make the position of the end plate 130 installed on the inner pipe 110 more flexible.

[0054] In some embodiments, the inner bellows 120, the inner tube 110, the outer bellows 140 and the outer tube 150 are all made of metal. In these embodiments, the inner bellows 120 is welded to the inner tube 110, and the outer bellows 140 is welded to the outer tube 150. By welding, the inner bellows 120 and the inner tube 110 are fixedly and tightly connected, and the outer bellows 140 and the outer tube 150 are fixedly and tightly connected.

[0055] In some embodiments, a reinforcement ring 160 is welded at a weld between the inner bellows 120 and the inner tube 110 , and / or a reinforcement ring 160 is provided at a weld between the outer bellows 140 and the outer tube 150 .

[0056] That is to say, the reinforcement ring 160 can be set only at the weld between the inner bellows 120 and the inner tube 110; the reinforcement ring 160 can be set only at the weld between the outer bellows 140 and the outer tube 150; and the reinforcement ring 160 can be set at both the weld between the inner bellows 120 and the inner tube 110 and the weld between the outer bellows 140 and the outer tube 150.

[0057] In these embodiments, the inner bellows 120 and the inner tube 110 are first welded together, and then a reinforcement ring 160 is sleeved on their welds, and then the two axial ends of the reinforcement ring 160 are respectively welded to the inner bellows 120 and the inner tube 110 to improve the strength of the connection between the inner bellows 120 and the inner tube 110; the outer bellows 140 and the outer tube 150 are first welded together, and then a reinforcement ring 160 is sleeved on their welds, and then the two axial ends of the reinforcement ring 160 are respectively welded to the outer bellows 140 and the outer tube 150 to improve the strength of the connection between the outer bellows 140 and the outer tube 150.

[0058] In some embodiments, the end plate 130 is also made of metal. In these embodiments, the external tube 150 is welded to the end plate 130, and the end plate 130 is welded to the internal tube 110. By welding, the external tube 150 is fixedly and tightly connected to the end plate 130, and the end plate 130 is fixedly and tightly connected to the internal tube 110.

[0059] In order to control the maximum extension and contraction of the inner bellows 120 and the outer bellows 140, in some embodiments, as Figure 2 As shown, along the circumference of the end plate 130, a plurality of avoidance through holes 130a are arranged at intervals on the end plate 130, and the avoidance through holes 130a on the two end plates 130 are arranged opposite to each other. In other words, a plurality of avoidance through holes 130a are arranged at intervals along the circumference of the end plate 130, and when the two end plates 130 are respectively installed on the two inner bellows 120, the two avoidance through holes 130 located at the same position on the two end plates 130 are opposite to each other.

[0060] like Figure 1 As shown, the corrugated compensator 100 further includes a plurality of tie rods 170 and nuts 180, and the number of tie rods 170 is consistent with the number of avoidance through holes 130a on the end plate 130. It should be noted that the number of tie rods 170 is consistent with the number of avoidance through holes 130a on one end plate 130. The tie rod 170 passes through the two end plates 130 through the avoidance through holes 130a, that is, the two sides of one tie rod 170 are respectively located in the avoidance through holes 130a at the same position of the two end plates 130.

[0061] The nut 180 is threadedly connected to the tie rod 170, and along the axial direction of the inner tube 110, a plurality of nuts 180 are respectively located on both sides of the end plate 130. In other words, the tie rod 170 is provided with an external thread, and the nut 180 is threadedly connected to the tie rod 170, and at least one nut 180 is provided on both sides of each end plate 130.

[0062] Along the axial direction of the inner tube 110, the spacing between the two nuts 180 on both sides of the end plate 130 is greater than the dimension of the end plate 130 in the axial direction of the inner tube 110, so that the end plate 130 can move in the area between the two nuts 180 to adapt to the expansion and contraction of the inner bellows 120 and the outer bellows 140. When the position of the nut 180 is determined, the minimum spacing and the maximum spacing between the two end plates 130 are determined to limit the maximum expansion and contraction of the inner bellows 120 and the outer bellows 140, prevent the inner bellows 120 and the outer bellows 140 from being damaged by excessive contraction or excessive extension, so as to ensure the service life of the bellows compensator 100 of the present application.

[0063] With this design, the inner bellows 120 and the outer bellows 140 in the bellows compensator 100 can expand and contract automatically as the stress on the pipeline changes; when performing maintenance operations, the staff can also adjust the position of the nut 180 to adjust the expansion and contraction of the inner bellows 120 and the outer bellows 140 in the bellows compensator 100, thereby adjusting the length of the bellows compensator 100, so as to facilitate the disassembly and assembly of sealing gaskets and other components on the pipeline during maintenance, thereby facilitating the maintenance work.

[0064] In specific use, if the pipeline has a large demand for expansion and contraction compensation, multiple corrugated compensators 100 can be connected to the same pipeline to meet the pipeline with a large demand for expansion and contraction compensation.

[0065] like Figure 1 and Figure 2 As shown, each end plate 130 is provided with four avoidance through holes 130a, four pull rods 170, and twenty-four nuts 180; two nuts 180 are provided on the side of the end plate 130 away from the other end plate 130, and one nut 180 is provided on the side of the end plate 130 close to the other end plate 130; two nuts 180 are provided on the side of the end plate 130 away from the other end plate 130, which can prevent the nuts 180 from loosening to a certain extent.

[0066] like Figure 2 As shown, in some embodiments, the corrugated compensator 100 further includes a reinforcing plate 190, and the reinforcing plate 190 is fixedly connected to the inner pipe 110 and the end plate 130. With this design, the inner pipe 110 and the end plate 130 are not only directly connected, but also indirectly connected through the reinforcing plate 190. The design of the reinforcing plate 190 helps to improve the strength of the connection between the end plate 130 and the inner pipe 110.

[0067] like Figure 2 As shown, in some embodiments, eight reinforcement plates 190 are disposed on each end plate, and the eight reinforcement plates 190 are arranged at intervals around the circumference of the inner tube 110 .

[0068] In summary, the present application provides a bellows compensator 100, including an inner tube 110, an inner bellows 120, an end plate 130 and an outer bellows 140. The two sides of the inner bellows 120 are respectively sealed with the two inner tubes 110 to form a flow channel for the flow of the medium; the outer bellows 140 is sleeved on the outside of the inner bellows 120 and is sealed with the two end plates 130, and the end plate 130 is sleeved on the outside of the inner tube 110 and is sealed with the inner tube 110, so that the inner bellows 120, the inner tube 110, the end plate 130 and the outer bellows 140 are surrounded to form a closed chamber 100a. In this way, under normal working conditions, the bellows compensator 100 of the present application guides the flow through the inner bellows 120, and the outer bellows 140 is located outside the inner bellows 120, which can provide protection for the inner bellows 120 to a certain extent, avoid the influence of the external environment on the inner bellows 120, extend the service life of the inner bellows 120, and thus improve the service life of the bellows compensator 100; when the inner bellows 120 is damaged due to fatigue, corrosion, etc., since the outer bellows 140 and the end plate 130 are tightly connected, and the end plate 130 is tightly connected to the inner pipe 110, therefore, under the action of the outer bellows 140, the bellows compensator 100 will not leak the medium, and under the action of the outer bellows 140, the bellows compensator 100 can still achieve the function of guiding the flow, so that the bellows compensator 100 can continue to be used for a period of time, which extends the service life of the bellows compensator 100 to a certain extent; in addition, the present The bellows compensator 100 of the present application can be used for both unidirectional and bidirectional flow of the medium. When it is installed on the pipeline, it helps to achieve bidirectional transmission of the medium and is more convenient for the transmission of the medium. In addition, the bellows compensator 100 of the present application limits the maximum expansion and contraction of the inner bellows 120 and the outer bellows 140 by setting the pull rod 170 and the nut 180, thereby preventing the inner bellows 120 and the outer bellows 140 from being damaged by excessive contraction or excessive elongation. With such a design, the inner bellows 120 and the outer bellows 140 in the bellows compensator 100 can expand and contract automatically with the stress changes on the pipeline. When performing maintenance operations, the staff can also adjust the position of the nut 180 to adjust the expansion and contraction of the inner bellows 120 and the outer bellows 140 in the bellows compensator 100, thereby adjusting the length of the bellows compensator 100, so as to facilitate the disassembly and assembly of sealing gaskets and other components on the pipeline during maintenance, so as to facilitate the maintenance work.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0070] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0071] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A corrugated compensator, characterized in that: include: Two internal pipes (110), the two internal pipes (110) being arranged opposite to each other; An inner bellows (120) is located between the two inner tubes (110), and both ends of the inner bellows (120) along the axial direction thereof are respectively closely connected to the two inner tubes (110); Two end plates (130) are respectively sleeved on the two inner tubes (110) and are hermetically connected to the inner tubes (110); The outer bellows (140) is sleeved outside the inner bellows (120) and is located between the two end plates (130), and its two ends along the axial direction are respectively sealed and connected to the two end plates (130); the inner bellows (120), the inner tube (110), the end plates (130) and the outer bellows (140) together form a sealed chamber (100a).

2. The corrugated compensator according to claim 1, characterized in that: The inner diameter of the inner bellows (120) is greater than or equal to the inner diameter of the inner tube (110), and the outer diameter of the inner bellows (120) is smaller than the inner diameter of the outer bellows (140).

3. The corrugated compensator according to claim 1, characterized in that: The wave height of the inner bellows (120) is 4-6 mm; the wave height of the outer bellows (140) is 30-50 mm.

4. The corrugated compensator according to claim 1, characterized in that: The inner bellows (120), the outer bellows (140) and the inner tube (110) are coaxially arranged.

5. The corrugated compensator according to any one of claims 1 to 4, characterized in that: The bellows compensator (100) further comprises two external tubes (150), the two external tubes (150) being respectively sleeved on the two internal tubes (110); along the axial direction of the internal tubes (110), the two external tubes (150) are respectively located on both sides of the external bellows (140), and are hermetically connected to the external tubes (150) and the end plate (130); the inner bellows (120), the inner tube (110), the end plate (130), the external tube (150) and the outer bellows (140) are enclosed to form the chamber (100a).

6. The corrugated compensator according to claim 5, characterized in that: The inner bellows (120) is welded to the inner tube (110), and the outer bellows (140) is welded to the outer tube (150).

7. The corrugated compensator according to claim 6, characterized in that: A reinforcement ring (160) is welded at the weld joint between the inner bellows (120) and the inner tube (110), and / or a reinforcement ring (160) is provided at the weld joint between the outer bellows (140) and the outer tube (150).

8. The corrugated compensator according to claim 6, characterized in that: The external pipe (150) is welded to the end plate (130), and the end plate (130) is welded to the internal pipe (110).

9. The corrugated compensator according to any one of claims 1 to 4, characterized in that: Along the circumference of the end plate (130), a plurality of avoidance through holes (130a) are arranged at intervals on the end plate (130), and the avoidance through holes (130a) on the two end plates (130) are arranged opposite to each other; The corrugated compensator (100) also includes a plurality of tie rods (170) and nuts (180), wherein the number of the tie rods (170) is consistent with the number of the avoidance holes (130a) on the end plate (130); the tie rods (170) pass through the two end plates (130) through the avoidance holes (130a), and the nuts (180) are threadedly connected to the tie rods (170), and along the axial direction of the inner tube (110), the plurality of nuts (180) are respectively located on both sides of the end plate (130).

10. The corrugated compensator according to any one of claims 1 to 4, characterized in that: The corrugated compensator (100) further comprises a reinforcing plate (190), wherein the reinforcing plate (190) is fixedly connected to the inner pipe (110) and the end plate (130).

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