Steam exhaust connection pipe with limiting device

Abstract

The application relates to the field of steam exhaust connecting pipes, in particular to a steam exhaust connecting pipe with a limiting device, which comprises at least two pipe sections which are butted against each other along a first direction, wherein two adjacent pipe sections are connected through expansion joints, characterized in that the steam exhaust connecting pipe further comprises a limiting device arranged at the expansion joint, the limiting device comprises two supporting members and a limiting member, the two supporting members are respectively fixed on the two pipe sections connected by the expansion joint; wherein the two supporting members can relatively move in the first direction; the limiting member is arranged between the two supporting members and is used for limiting the relative moving range of the two supporting members in the first direction, so as to limit the compression amount of the expansion joint in the first direction to not more than a set value; under the action of the limiting device, the expansion joint can only be compressed to a set amount, and when the expansion joint is compressed to the set value, the expansion joint will not continue to be compressed, so that the expansion joint is protected.

Description

Technical Field

[0001] This application relates to the field of exhaust pipe connection, and more particularly to an exhaust pipe connection with a limiting device. Background Technology

[0002] The exhaust pipe is mainly used to connect the condenser and the steam turbine, that is, the steam discharged from the steam turbine is introduced into the condenser through the exhaust pipe.

[0003] In related technologies, exhaust pipes are usually formed by connecting multiple pipe sections. Adjacent pipe sections are generally connected by expansion joints to absorb the axial thermal expansion and displacement of the exhaust pipe.

[0004] However, in practical applications, expansion joints can break due to excessive compression, so improvements are still needed. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a steam exhaust pipe with a limiting device.

[0006] To achieve the above objectives, this application provides the following technical solution.

[0007] A steam exhaust pipe with a limiting device includes at least two pipe segments that are connected to each other along a first direction, wherein the ends of adjacent pipe segments are connected by an expansion joint. The steam exhaust pipe also includes a limiting device disposed at the expansion joint, the limiting device including two support members and a limiting member. The two support members are respectively fixed on the two pipe segments connected by the expansion joint. The two support members are movable relative to each other in the first direction. The limiting member is disposed between the two support members to limit the relative range of movement of the two support members in the first direction, thereby limiting the compression of the expansion joint in the first direction to not exceed a set value.

[0008] Compared with existing technologies, the advantages of this solution are:

[0009] In this design, a limiting component and two supporting components are used as limiting devices. Thus, when the exhaust pipe is in operation, the relative axial displacement (first direction) of the two pipe sections is essentially the compression of the expansion joint. That is, when the expansion joint is compressed due to thermal expansion displacement of the two pipe sections, the two supporting components will also move closer to each other along the first direction. When the expansion joint is compressed to a certain distance, the two supporting components will be limited by the limiting component, preventing them from moving closer to each other along the first direction. This prevents the expansion joint from being compressed further and thus avoids damage to the expansion joint due to excessive compression.

[0010] In short, this solution uses a limiting device to ensure that the expansion joint can only be compressed to a set amount (i.e., a set value). Once the expansion joint reaches the set value, it will stop compressing, thus protecting the expansion joint.

[0011] As an optional embodiment of this application, the two supporting members are a first supporting member and a second supporting member; the first supporting member includes a first supporting plate extending along a first direction, and the second supporting member includes a second supporting plate extending along the first direction; the first supporting plate and the second supporting plate are offset from each other in a second direction, and the first supporting plate and the second supporting plate at least partially overlap in their projections in the second direction to form an overlapping area, wherein the second direction is perpendicular to the first direction; the limiting member includes a pin, which passes through the overlapping area of ​​the first supporting plate and the second supporting plate along the second direction, thereby limiting the relative range of motion of the first supporting plate and the second supporting plate in the first direction.

[0012] As an optional embodiment of this application, the first support plate is provided with a first pin hole through which the pin body passes; the second support plate is provided with a second pin hole through which the pin body passes; the diameter of the first pin hole is larger than the diameter of the pin body, and the difference between the two diameters is between 5mm and 6mm.

[0013] As an optional embodiment of this application, the second support plate includes two second support plates, which are arranged side by side and spaced apart along a second direction, and the first support plate is disposed between the two second support plates; the pin is simultaneously passed through the first support plate and the two second support plates.

[0014] As an optional embodiment of this application, both ends of the pin are provided with limiting parts, which restrict the pin from coming out of the first support plate and the second support plate.

[0015] As an optional embodiment of this application, both limiting parts are welded to the pin body; or the limiting component includes a bolt and a nut, the threaded section of the bolt forming the pin body; the cap end of the bolt forming one of the two limiting parts, and the nut threadedly connected to the bolt forming the other limiting part.

[0016] As an optional embodiment of this application, the first support member further includes a first connecting seat, the first connecting seat being fixed on one of the pipe segments, and the first support plate being fixed to the first connecting seat; and / or the second support member includes a second connecting seat, the second connecting seat being fixed on another pipe segment, and the second support plate being fixed to the second connecting seat.

[0017] As an optional implementation of this application, at least two limiting devices are provided, and each limiting device is arranged sequentially along the circumference of the pipe section.

[0018] The advantages and effects of this air pressure scheme are explained in detail in the specific implementation method and the accompanying drawings.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0020] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, wherein:

[0021] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0022] Figure 1 A partial structural schematic diagram of this application is shown;

[0023] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0024] Explanation of the labels in the diagram:

[0025] 1. Pipe section;

[0026] 2. Expansion joint;

[0027] 3. Limiting device;

[0028] 31. First supporting member; 311. First supporting plate; 311a. First pin hole; 312. First connecting seat;

[0029] 32. Second support member; 321. Second support plate; 321a. Second pin hole; 322. Second connecting seat;

[0030] 33. Limiting component; 331. Pin; 332. Limiting part. Detailed Implementation

[0031] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Reference Figure 1 and Figure 2As shown, this embodiment provides a steam exhaust pipe with a limiting device. The steam exhaust pipe is mainly used for connecting the condenser and the steam turbine. The steam discharged from the steam turbine is introduced into the condenser through the steam exhaust pipe.

[0033] like Figure 1 As shown, the exhaust pipe provided in this embodiment includes at least two pipe segments 1 that are connected to each other along a first direction. Here, the first direction can also be understood as the axial direction of the pipe segment 1 or the steam flow direction of the exhaust pipe. Accordingly, in this embodiment, the direction perpendicular to the first direction is referred to as the second direction.

[0034] The two adjacent pipe sections 1 are connected at their ends by an expansion joint 2. The expansion joint 2 is mainly used to absorb the thermal expansion displacement generated between the two adjacent pipe sections 1. Specifically, when the two pipe sections 1 generate thermal expansion displacement, the expansion joint 2 will be compressed accordingly to absorb the thermal expansion displacement. The expansion joint 2 has been widely used and explained in existing condenser exhaust pipe connections, so its specific structure will not be described in detail here.

[0035] However, expansion joint 2 is not infinitely compressible; it generally has a maximum compression capacity that it can withstand. When the actual compression exceeds the maximum compression capacity, expansion joint 2 will be damaged due to over-compression.

[0036] Based on this, in this embodiment, a limiting device 3 is provided at the position of the expansion joint 2. The compression amount of the expansion joint 2 is controlled and limited by the limiting device 3 so that the compression amount of the expansion joint 2 will not exceed the set value. The set value can be designed according to actual needs, as long as the set value does not exceed the maximum compression amount that the expansion joint 2 can actually withstand.

[0037] In this embodiment, multiple limiting devices 3 are preferably provided at the same expansion joint 2 location, and each limiting device 3 is arranged sequentially along the circumference of the pipe segment 1. The structures of each limiting device 3 are basically the same. Therefore, this embodiment will be described in detail using one of them as an example:

[0038] like Figure 2 As shown, the limiting device 3 includes two supporting members and a limiting member 33. The two supporting members are respectively fixed on the two pipe sections 1 connected by the expansion joint 2. In order to distinguish them, in this embodiment, the two supporting members are respectively referred to as the first supporting member 31 and the second supporting member 32. For example, in this embodiment, taking the view shown in the figure as an example, the first supporting member 31 is provided on the upper pipe section 1, and the second supporting member 32 is provided on the lower pipe section 1.

[0039] The two support members can move relative to each other in the first direction, so as to ensure that the first support member 31 and the second support member 32 can move axially synchronously with the two pipe sections 1. At this time, the relative axial displacement of the two pipe sections 1 is equivalent to the relative displacement of the two support members in the first direction. The relative position of the two can be basically considered as the compression of the expansion joint 2.

[0040] The limiting member 33 is disposed between the two supporting members to limit the relative range of motion of the two supporting members in the first direction, thereby limiting the compression of the expansion joint 2 in the first direction to not exceed the set value.

[0041] When the expansion joint 2 is compressed due to thermal expansion of the two pipe sections 1, the two supporting members will also move closer to each other along the first direction during this process. When the expansion joint 2 is compressed to a certain distance, the two supporting members that are relatively displaced will be limited by the limiting member 33, so that the two supporting members cannot continue to move closer to each other along the first direction. In this way, the expansion joint 2 will not continue to be compressed, thereby preventing the expansion joint 2 from being damaged due to excessive compression.

[0042] In some embodiments:

[0043] like Figure 2 As shown, the first support member 31 also includes a first connecting seat 312 and a first support plate 311; the first connecting seat 312 is fixed on the upper pipe section 1, for example, the two are welded together; while the first support plate 311 extends along the first direction, and its upper end is fixed together with the first connecting seat 312. Specifically, the first connecting seat 312 and the first support plate 311 can be an integral structure, or they can be welded together.

[0044] The second support member 32 includes a second connecting seat 322 and a second support plate 321; the second connecting seat 322 is fixed to the lower pipe section 1, for example, by welding them together; the second support plate 321 extends along the first direction, and its lower end is fixed to the second connecting seat 322. The second connecting seat 322 and the second support plate 321 can be an integral structure, or they can be welded together.

[0045] Furthermore, the first support plate 311 and the second support plate 321 are offset from each other in the second direction to avoid interference between them affecting their relative displacement in the first direction. The second direction is perpendicular to the first direction.

[0046] Furthermore, in the projection in the second direction, the first support plate 311 and the second support plate 321 at least partially overlap to form an overlapping area, and the overlapping area of ​​the two serves as the installation area of ​​the limiting member 33.

[0047] The limiting member 33 includes a pin 331, which may be cylindrical, for example. The pin 331 passes through the overlapping area of ​​the first support plate 311 and the second support plate 321 along the second direction, and the pin 331 limits the relative range of motion of the first support plate 311 and the second support plate 321 in the first direction.

[0048] Specifically, such as Figure 2 As shown, the second support plate 321 is provided with a second pin hole 321a through which the pin body 331 passes. The diameter of the second pin hole 321a can be basically matched with the diameter of the pin body 331, for example, it is 0.5mm larger than the diameter of the pin body 331, so that the pin body 331 can pass through.

[0049] The first support plate 311 is provided with a first pin hole 311a through which the pin body 331 passes; the diameter of the first pin hole 311a is larger than the diameter of the pin body 331, and the difference between the two diameters is between 5mm and 6mm. The difference between the two diameters can be basically understood as the maximum relative displacement of the first support plate 311 and the second support plate 321; or in other words, the first pin hole 311a limits the range of motion of the pin body 331, thereby limiting the relative displacement range of the first support plate 311 and the second support plate 321.

[0050] For example, when the expansion joint 2 is compressed to a certain extent, the pin 331 will abut against the upper wall of the first pin hole 311a, thereby restricting the first support plate 311 and the second support plate 321 from continuing to approach each other, thus preventing the expansion joint 2 from being compressed further.

[0051] In this embodiment, the second support plate 321 is a component that supports and retains the pin 331. In order to improve the support effect on the pin 331, the second support plate 321 includes two plates, which are arranged side by side and spaced apart along the second direction. The first support plate 311 is disposed between the two second support plates 321. The pin 331 passes through both the first support plate 311 and the two second support plates 321.

[0052] Thus, the two second support plates 321 provide two support points for the pin 331, and the pressure point of the pin 331 from the first support plate 311 is between the two support points, which helps to improve the support effect on the pin 331.

[0053] To prevent the pin 331 from detaching from the first support plate 311 and the second support plate 321, in some embodiments, both ends of the pin 331 are provided with limiting portions 332. These limiting portions 332 restrict the pin 331 from detaching from the first support plate 311 and the second support plate 321, as shown in the figure. The two limiting portions 332 are located on the outer sides of the two second support plates 321. The dimensions of the two limiting portions 332 are larger than the diameter of the second pin hole 321a on the second support plate 321. Thus, the pin 331 will not detach from the two support plates due to the obstruction of the limiting portions 332.

[0054] As for the specific structure of the limiting part 332, in some embodiments, both limiting parts 332 are welded to the pin 331. It can be understood that during installation, at least one limiting part 332 is not welded to the pin 331 first. Welding is carried out after the pin 331 passes through the first support plate 311 and the second support plate 321. Otherwise, if the two limiting parts 332 are welded in advance, the pin 331 will not be able to pass through the first pin hole 311a and the second pin hole 321a.

[0055] Of course, in some other alternative embodiments, the limiting member 33 may include a bolt and a nut, the threaded section of the bolt forming the pin 331; the cap end of the bolt forming one of the two limiting portions 332; and the nut threadedly connected to the bolt forming the other limiting portion 332.

[0056] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A steam exhaust pipe with a limiting device, the steam exhaust pipe comprising at least two pipe sections mating together along a first direction, wherein adjacent pipe sections are connected at their ends by an expansion joint, characterized in that, The exhaust pipe also includes a limiting device located at the expansion joint. The limiting device includes two supporting members and a limiting member. The two supporting members are respectively fixed on the two pipe sections connected by the expansion joint. The two supporting members are movable relative to each other in a first direction. The limiting member is located between the two supporting members to limit the relative range of movement of the two supporting members in the first direction, thereby limiting the compression of the expansion joint in the first direction to not exceed a set value.

2. The exhaust pipe with a limiting device according to claim 1, characterized in that, The two supporting components are a first supporting component and a second supporting component; the first supporting component includes a first supporting plate extending along a first direction, and the second supporting component includes a second supporting plate extending along the first direction; the first supporting plate and the second supporting plate are offset from each other in a second direction, and the first supporting plate and the second supporting plate at least partially overlap in their projections in the second direction to form an overlapping area, wherein the second direction is perpendicular to the first direction; the limiting component includes a pin, which passes through the overlapping area of ​​the first supporting plate and the second supporting plate along the second direction, and the pin limits the relative range of motion of the first supporting plate and the second supporting plate in the first direction.

3. The exhaust pipe with a limiting device according to claim 2, characterized in that, The first support plate has a first pin hole through which the pin body passes; the second support plate has a second pin hole through which the pin body passes; the diameter of the first pin hole is larger than the diameter of the pin body, and the difference between the two diameters is between 5mm and 6mm.

4. The exhaust pipe with a limiting device according to claim 3, characterized in that, The second support plate includes two plates, which are arranged side by side and spaced apart along the second direction. The first support plate is located between the two second support plates. The pin passes through both the first support plate and the two second support plates.

5. A steam exhaust pipe with a limiting device according to claim 3 or 4, characterized in that, Both ends of the pin are provided with limiting parts, which restrict the pin from coming out of the first support plate and the second support plate.

6. A steam exhaust pipe with a limiting device according to claim 5, characterized in that, Both limiting parts are welded to the pin body; or the limiting component includes a bolt and a nut, the threaded section of the bolt forming the pin body; the cap end of the bolt forming one of the two limiting parts, and the nut threadedly connected to the bolt forming the other limiting part.

7. A steam exhaust pipe with a limiting device according to claim 2, characterized in that, The first support member further includes a first connecting seat, which is fixed to one of the pipe segments, and the first support plate is fixed to the first connecting seat; and / or the second support member includes a second connecting seat, which is fixed to another pipe segment, and the second support plate is fixed to the second connecting seat.

8. A steam exhaust pipe with a limiting device according to claim 1, characterized in that, At least two limiting devices are provided, and each limiting device is arranged sequentially along the circumference of the pipe section.

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