Protective element for a boiler bend

Abstract

The present disclosure relates to the technical field of pipeline protection, and particularly relates to a protection piece for a boiler elbow pipe. The protection piece for the boiler elbow pipe is provided with a positioning groove and a fixing part, wherein the positioning groove extends along the pipe body direction of the boiler elbow pipe and is configured to cover the pipe body of the windward side of the boiler elbow pipe, and the fixing part is configured to be wound on the boiler elbow pipe under the action of external force. The protection piece for the boiler elbow pipe provided by the present disclosure has a simple structure. When assembling, the positioning groove is first used to cover the pipe body of the windward side of the boiler elbow pipe, the gap between the protection piece and the boiler elbow pipe is adjusted to a preset amount, and then the fixing part is wound on the pipe body of the boiler elbow pipe to fix the protection piece. Obviously, the protection piece has a simple structure, and the gap between the protection piece and the pipe body of the elbow pipe is actively adjusted by using the winding fixing part. The protection piece and the boiler elbow pipe are fixedly connected in a clever manner, thereby solving the problem of rotation misalignment of the protection piece relative to the boiler elbow pipe, and greatly improving the protection effect of the protection piece on the windward side of the boiler elbow pipe.

Description

Technical Field

[0001] This disclosure relates to the field of pipeline protection technology, and in particular to a protective component for boiler bends. Background Technology

[0002] The heating surface of the horizontal flue of a thermal power plant boiler is prone to thinning or even leakage due to the blowing of flue gas. Therefore, it is necessary to install anti-wear protective tiles on the windward side of the pipe.

[0003] The commonly used method in the market is to use a retaining ring and abrasion-resistant sheet to clamp the pipe, and then weld the retaining ring and abrasion-resistant sheet together to achieve mutual fixation. However, it is difficult to control the gap between the abrasion-resistant sheet and the pipe during the welding process. If the gap is too large, the abrasion-resistant sheet may rotate relative to the pipe. If the gap is too small, the pipe will expand due to heat, and the outward expansion force may cause the weld between the retaining ring and the abrasion-resistant sheet to break, resulting in the abrasion-resistant sheet loosening or even falling off. Utility Model Content

[0004] To address the problem of existing anti-wear protective tiles easily loosening and falling off, this disclosure provides a protective component for boiler bends.

[0005] This disclosure provides a protective component for boiler bends, the protective component having a positioning groove and a fixing part;

[0006] The positioning groove extends along the tube body of the boiler bend and is configured to cover the windward side of the boiler bend. The fixing part is configured to wrap around the boiler bend under external force.

[0007] In one embodiment of this disclosure, the fixing portion is configured as an elongated fixing portion extending along the direction of the tube body.

[0008] In one embodiment of this disclosure, the fixing part is configured as an elongated fixing part extending in a direction perpendicular to the tube body.

[0009] In one embodiment of this disclosure, the cross-sectional areas of the elongated fixing portions are equal in the direction from the connecting end to the free end.

[0010] In one embodiment of this disclosure, the cross-sectional area of ​​the elongated fixing portion decreases in the direction from the connecting end to the free end.

[0011] In one embodiment of this disclosure, the cross-section of the elongated fixing part is trapezoidal or rectangular.

[0012] In one embodiment of this disclosure, the positioning groove includes a first groove segment, a second groove segment, and a transition groove segment connecting the first groove segment and the second groove segment, and the fixing part (12) is disposed at the end of the first groove segment and / or the second groove segment;

[0013] In a plane perpendicular to the direction of the boiler bend, the cross-section of the positioning groove is an arc surface, and the central angle of the arc surface is 120°-160° or 180°.

[0014] In one embodiment of this disclosure, the positioning groove includes a first groove segment, a second groove segment, and a transition groove segment connecting the first groove segment and the second groove segment;

[0015] The fixing part is provided at the end of the first groove segment, and the fixing piece is provided at the end of the second groove segment. The fixing piece extends in a direction perpendicular to the pipe body and bends to clamp the pipe body under the action of external force.

[0016] In one embodiment of this disclosure, the angle between the axes of the first groove segment and the second groove segment is 60°-150°.

[0017] In one embodiment of this disclosure, the protective component is a stainless steel protective component, and is formed by bending a stainless steel plate.

[0018] One beneficial effect of this disclosure is that the protective component for the boiler bend provided by this disclosure is provided with a positioning groove and a fixing part, wherein the positioning groove extends along the pipe body direction of the boiler bend and is configured to cover the pipe body on the windward side of the boiler bend, and the fixing part is configured to wrap around the boiler bend under the action of external force.

[0019] The protective component for boiler bends disclosed in this invention has a simple structure. During assembly, the positioning groove first covers the windward side of the boiler bend, and the gap between the protective component and the boiler bend is adjusted to a preset amount. Then, the fixing part is wrapped around the boiler bend to secure the protective component. Clearly, this protective component has a simple structure and utilizes the wrappable fixing part to actively adjust the gap between the protective component and the bend, cleverly achieving a fixed connection between the protective component and the boiler bend. This solves the problem of rotational misalignment of the protective component relative to the boiler bend, greatly improving the protective effect of the protective component on the windward side of the boiler bend.

[0020] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0022] Figure 1 This is a schematic diagram of the structure of the first protective component provided in an embodiment of this disclosure;

[0023] Figure 2 This is a schematic diagram of the assembly structure of the first protective component and the boiler bend provided in an embodiment of this disclosure;

[0024] Figure 3 This is a schematic diagram of the assembly structure of the second type of protective component and the boiler bend provided in one embodiment of this disclosure;

[0025] Figure 4 This is a schematic diagram of the structure of a third type of protective component provided in an embodiment of this disclosure;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the third type of protective component and the boiler bend provided in one embodiment of this disclosure;

[0027] Figure 6 This is a schematic diagram of the structure of the fourth type of protective component provided in an embodiment of this disclosure;

[0028] Figure 7 This is a schematic diagram of the assembly structure of the fourth type of protective component and the boiler bend provided in one embodiment of this disclosure;

[0029] Figure 8 This is a schematic diagram of the structure of the fifth type of protective component provided in one embodiment of this disclosure.

[0030] Figures 1 to 8 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0031] 11. Positioning groove; 111. First groove section; 112. Transition groove section; 113. Second groove section; 12. Fixing part; 13. Fixing piece; 2. Boiler bend; 3. Snap ring. Detailed Implementation

[0032] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0037] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0038] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0039] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0040] In order to solve the problem that the wear-resistant protective tiles in the prior art are easy to loosen and fall off, this disclosure provides a protective component for boiler bend 2.

[0041] This disclosure provides a protective component for a boiler bend 2, the protective component having a positioning groove 11 and a fixing part 12; wherein, the positioning groove 11 extends along the pipe body direction of the boiler bend 2 and is configured to cover the pipe body of the boiler bend 2 on the windward side, and the fixing part 12 is configured to wrap around the boiler bend 2 under the action of external force.

[0042] Specifically, the protective component consists of a main body and a fixing part 12. The positioning groove 11 is disposed in the main body, and the cross-sectional shape of the main body can be a semi-circular ring or a semi-circular ring with an angle of 120°-160°. Therefore, in one embodiment of this disclosure, in the plane perpendicular to the direction of the boiler bend 2, the cross-section of the positioning groove 11 is an arc surface, and the central angle of the arc surface is 120°-160° or 180°.

[0043] The main body and the positioning groove 11 provided on the main body extend along the pipe body direction of the boiler bend 2. For example... Figure 1 , 2 As shown, when installing the protective component, the positioning groove 11 fits into part of the boiler bend 2.

[0044] The fixing part 12 is integrally formed with the main body. After the positioning groove 11 is attached to part of the boiler bend 2, the workers use tools, such as pliers, to fix the fixing part 12 to the boiler bend 2 by wrapping.

[0045] The protective component of the boiler bend 2 provided in this disclosure has a simple structure. The fixing component is fixed to the boiler bend 2 by winding. During the winding process, the operator can control the winding force and thus control the degree of fit between the protective component and the boiler bend 2, so as to avoid the gap between the two being too large, which would cause the protective component to rotate relative to the boiler bend 2, thereby affecting the protective effect of the protective component on the windward side of the boiler bend 2.

[0046] Furthermore, since the protective component of the boiler bend 2 provided in this disclosure has a fixed part 12 integrally formed with the main body, the stress concentration at the transition part between the fixed part 12 and the main body is relatively small. Therefore, even if the protective component fits too tightly with the boiler bend 2, and the boiler bend 2 expands outward after being heated, the force of the expansion can be resolved by the deformation of the fixed part 12. The phenomenon that occurs in the prior art, where the weld between the retaining ring and the anti-wear protective tile breaks due to the expansion force, will not occur.

[0047] More specifically, when the boiler bend 2 expands outward due to heat, the fixing part 12 wrapped around the boiler bend 2 deforms after being subjected to the expansion force, so that the expansion force is not concentrated in one place, resulting in structural damage.

[0048] The protective component of the boiler bend 2 provided in this disclosure will be described in conjunction with four embodiments:

[0049] Example 1:

[0050] like Figure 1 , 2 As shown, in this embodiment, one end of the protective component is provided with a fixing part 12, which is fixed by wrapping the fixing part 12 around the boiler bend 2, while the other end is fixed relative to the boiler bend 2 by welding the traditional retaining ring 3 to the protective component.

[0051] It should be noted that the protective component in this embodiment is mainly applied to the right-angle boiler bend 2, that is, the boiler bend 2 is composed of three parts: a vertical part, a horizontal part, and a smooth transition part. One end with the fixing part 12 is wrapped and fixed to the horizontal part of the boiler bend 2, and the vertical part of the boiler bend 2 is welded and fixed to the protective component by the retaining ring 3.

[0052] Since the connection between the protective component and the horizontal part of the boiler bend 2 plays a load-bearing role for the entire protective component, the method of fixing the protective component to the horizontal part of the boiler bend 2 provided in this disclosure adopts the method of wrapping the fixing part 12 to ensure the working position of the protective component, avoid the protective component from detaching from the horizontal part of the boiler bend 2, and prevent the protective component from moving down as a whole, thereby improving the protective effect of the protective component on the windward side of the boiler bend 2.

[0053] Furthermore, during actual installation, the vertical portion of the boiler bend 2 has a small distance from other pipes, while the horizontal portion of the boiler bend 2, due to its transition section, often has a larger distance from other pipes. In this situation, for the vertical portion where the operating space is limited, the traditional method of welding the retaining ring 3 to the protective component is convenient for workers. However, the horizontal portion of the boiler bend 2 has sufficient space for workers to wrap the fixing part 12 around it; therefore, the horizontal portion of the boiler bend 2 is secured to the protective component by wrapping.

[0054] Example 2:

[0055] like Figure 3 As shown, in this embodiment, both ends of the protective component are provided with fixing parts 12, and both ends are fixed to the boiler bend 2 by wrapping. This arrangement can ensure that both ends of the protective component are stably fixed to the boiler bend 2. At the same time, due to the stable fixation, there will be no phenomenon of the protective component deflecting relative to the boiler bend 2, thus improving the service life of the equipment.

[0056] The protective component in this embodiment is suitable for scenarios where there is sufficient installation space and both ends of the fixed part 12 of the protective component bear the load. If either end falls off, the protective component will fail to protect the boiler bend 2.

[0057] Example 3:

[0058] like Figure 4 , 5 As shown, in this embodiment, the positioning groove 11 includes a first groove segment 111, a second groove segment 113, and a transition groove segment 112 connecting the first groove segment 111 and the second groove segment 113; a fixing part 12 is provided at the end of the first groove segment 111, and a fixing piece 13 is provided at the end of the second groove segment 113. The fixing piece 13 extends in a direction perpendicular to the pipe body and bends to clamp the pipe body under the action of external force.

[0059] Specifically, one end of the protective component, namely the end of the second groove section 113, is provided with a fixing part 12, and the other end, namely the end of the first groove section 111, extends from the main body of the protective component to both sides with fixing pieces 13. The end of the protective component with the fixing part 12 is wrapped and fixed with the boiler bend 2, and the end of the protective component with the fixing pieces 13 is closed together by the two fixing pieces 13 under the action of external force, so as to fix the end of the protective component to the boiler bend 2.

[0060] Compared to the protective component in Embodiment 1, the protective component in this embodiment has a fixing plate 13 at one end. When the boiler bend 2 expands outward due to heat, the force of the expansion can be resolved by the deformation of the fixing plate 13. Similarly, the phenomenon that occurs in the prior art, where the weld between the retaining ring and the anti-wear protective tile breaks due to the expansion force, will not occur.

[0061] Example 4:

[0062] like Figure 6 , 7 As shown, in this embodiment, both ends of the protective component are provided with fixing parts 12. The difference from Embodiment 2 is that the fixing part 12 in Embodiment 2 is a long strip-shaped fixing part extending along the direction of the tube body. In this embodiment, the fixing part 12 at one end is a long strip-shaped fixing part extending perpendicular to the direction of the tube body.

[0063] Compared to the long strip-shaped fixing part 12 that extends along the direction of the pipe body, the fixing part 12 that extends perpendicular to the direction of the pipe body is wrapped around the boiler bend 2 under the action of external force. The deformation of the connection end between the fixing part 12 and the main body is smaller, the impact on the strength of the fixing part 12 is smaller, and the fatigue life of the fixing part 12 can be improved.

[0064] Furthermore, to facilitate operation of the fixing part 12 by workers, allowing it to be wound around the boiler bend 2, in one embodiment of this disclosure, the cross-sectional area of ​​the elongated fixing part is equal in the direction from the connecting end to the free end. This arrangement makes it easier for the fixing part 12 to deform, and also makes it easier for workers to wrap it around the boiler bend 2. Simultaneously, when the boiler bend 2 expands due to heat, the outward expansion force is more easily dissipated by the deformation of the fixing part 12.

[0065] Based on this, in order to improve the strength of the connection end of the fixing part 12, and thus improve the fatigue life of the fixing part 12, such as... Figure 6 As shown, in one embodiment of this disclosure, the cross-sectional area of ​​the elongated fixing portion decreases in the direction from the connecting end to the free end.

[0066] That is, the connection area between the fixing part 12 and the main body is increased, thereby improving the connection strength between the fixing part 12 and the main body. The cross-sectional area of ​​the free end of the fixing part 12 is small, so as to make the free end of the fixing part 12 easier to deform and reduce the difficulty of operation for the staff.

[0067] In terms of the manufacturing process of the protective component, it can be pressed and molded first, and then the pressed protective component can be partially cut off to form the fixing part 12. Therefore, in one embodiment of this disclosure, the cross-section of the elongated fixing part is trapezoidal.

[0068] Because the protective components are pressed before being cut, the connection between the fixing part 12 and the protective body is stronger and has a longer service life.

[0069] In another embodiment of this disclosure, such as Figure 8As shown, the cross-section of the elongated fixing part is rectangular. That is, the protective part is first cut and then pressed into shape. This manufacturing method is simpler, the production efficiency of the protective part is high, and the fixing part 12 is more prone to deformation, making it easier for workers to operate.

[0070] In one embodiment of this disclosure, such as Figure 1 As shown, the positioning groove 11 includes a first groove segment 111, a second groove segment 113, and a transition groove segment 112 connecting the first groove segment 111 and the second groove segment 113. The fixing part 12 extends from the end of the first groove segment 111 and / or the second groove segment 113.

[0071] Specifically, such as Figure 1 As shown, the fixing part 12 extends from the end of the first groove segment 111, and Figure 6 As shown, the fixing part 12 is formed by extending from the ends of the first groove segment 111 and the second groove segment 113. Alternatively, the fixing part 12 may also extend from the end of the second groove segment 113.

[0072] The above are some extensions of the fixing part 12 listed in this disclosure. In practical applications, the staff can adjust the position of the fixing part 12 according to actual needs, such as setting the fixing part 12 in the middle of the main body of the protective part. This application will not elaborate further here.

[0073] In one embodiment of this disclosure, the included angle between the axes of the first groove segment 111 and the second groove segment 113 is less than 180°. Because the protective component provided in this disclosure requires the positioning groove 11 to be fitted against the boiler bend 2 during installation.

[0074] The transition section 112, connecting the first section 111 and the second section 113, needs to fit snugly against the bend of the boiler bend 2. To ensure that the first section 111 and the second section 113 fit snugly against the straight sections of the boiler bend 2, the angle between their axes should be equal to the angle between the axes of the straight sections at both ends of the bend, i.e., less than 180°. In this case, the protective component can be fixed relative to the boiler bend 2 via the fixing part 12.

[0075] In practical applications, if the angle between the axes of the first groove segment 111 and the second groove segment 113 is too large, such as 175°, the protective component will rotate relative to the boiler bend 2 if there is a gap between the protective component and the boiler bend 2 during the installation process, under the action of external forces, such as the blowing force generated by the flue gas.

[0076] Therefore, in actual operation, the included angle between the axes of the first section 111 and the second section 113 should be maintained in the range of 60°-150° to ensure that the protective component does not deflect relative to the boiler bend 2.

[0077] In one embodiment of this disclosure, the protective component is a stainless steel component, such as 1Cr18Ni9Ti or Cr23Ni13. Stainless steel protective components have good heat resistance and a longer service life. In the actual production process, the stainless steel plate is pressed, causing it to bend and form the protective component.

[0078] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A protective component for a boiler bend, characterized in that, The protective component has a positioning groove (11) and a fixing part (12). The positioning groove (11) extends along the pipe body direction of the boiler bend (2) and is configured to cover the pipe body of the boiler bend (2) on the windward side. The fixing part (12) is configured to wrap around the boiler bend (2) under the action of external force.

2. The protective component for boiler bends according to claim 1, characterized in that, The fixing part (12) is configured as a long strip-shaped fixing part extending along the direction of the tube body.

3. The protective component for boiler bends according to claim 1, characterized in that, The fixing part (12) is configured as a long strip-shaped fixing part extending in a direction perpendicular to the tube body.

4. The protective component for boiler bends according to claim 2 or 3, characterized in that, The cross-sectional areas of the elongated fixing parts are equal in the direction from the connecting end to the free end.

5. The protective component for boiler bends according to claim 2 or 3, characterized in that, The cross-sectional area of ​​the elongated fixing part decreases from the connecting end to the free end.

6. The protective component for boiler bends according to claim 3, characterized in that, The cross-section of the elongated fixing part is trapezoidal or rectangular.

7. The protective component for boiler bends according to claim 1, characterized in that, The positioning groove (11) includes a first groove segment (111), a second groove segment (113), and a transition groove segment (112) connecting the first groove segment (111) and the second groove segment (113). The fixing part (12) is disposed at the end of the first groove segment (111) and / or the second groove segment (113). In a plane perpendicular to the direction of the boiler bend (2), the cross-section of the positioning groove (11) is an arc surface, and the central angle of the arc surface is 120°-160° or 180°.

8. The protective component for boiler bends according to claim 1, characterized in that, The positioning groove (11) includes a first groove segment (111), a second groove segment (113), and a transition groove segment (112) connecting the first groove segment (111) and the second groove segment (113). The fixing part (12) is provided at the end of the first groove segment (111), and the fixing piece (13) is provided at the end of the second groove segment (113). The fixing piece (13) extends in a direction perpendicular to the tube body and bends to clamp the tube body under the action of external force.

9. The protective component for boiler bends according to claim 8, characterized in that, The angle between the axes of the first groove segment (111) and the second groove segment (113) is 60°-150°.

10. The protective component for boiler bends according to claim 1, characterized in that, The protective component is a stainless steel protective component, and is formed by bending stainless steel plate.

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