Protective device suitable for creep measuring point of steam pipeline

Abstract

The utility model relates to the field of creep monitoring of high-temperature and high-pressure steam pipelines in the power industry, in particular to a protection device suitable for a creep measuring point of a steam pipeline. The protection device comprises a plurality of arc-shaped pipe clamps, the arc-shaped pipe clamps are sequentially connected in a fastened mode to form the protection device, the protection device is arranged on the periphery of the steam pipeline in a hooping mode, and the number of the arc-shaped pipe clamps is matched with the number of creep deformation measuring points arranged on the steam pipeline; and each arc-shaped pipe clamp is provided with a protective cap, and each protective cap is used for accommodating each creep measuring point of the steam pipeline in a one-to-one correspondence manner. The protection device solves the technical problem that creep data cannot be accurately measured due to the fact that creep measuring points are easily damaged by an existing protection device.

Description

Technical Field

[0001] This application relates to the field of creep monitoring of high-temperature and high-pressure steam pipelines in the power industry, and in particular to a protective device suitable for creep measuring points of steam pipelines. Background Technology

[0002] In the power industry, high-temperature and high-pressure steam pipelines are prone to creep under the combined effects of high temperature, high pressure and long duration. Creep failure is one of the main failure modes of steam pipelines. Therefore, creep monitoring is carried out. Creep monitoring can obtain real-time creep data of steam pipeline materials under specific conditions, providing a reliable basis for assessing the long-term stability and endurance strength of the materials.

[0003] Currently, relevant technical standards have made clear provisions and requirements for creep monitoring of high-temperature and high-pressure steam pipelines. For example, DL / T 438-2023 "Technical Supervision Regulations for Metals in Thermal Power Plants" clearly requires that creep deformation measurement be carried out on main steam pipelines and high-temperature reheat steam pipelines in accordance with DL / T 441. DL / T 441-2004 "Supervision Regulations for Creep of High-Temperature and High-Pressure Steam Pipelines in Thermal Power Plants" specifies two methods for creep deformation measurement: creep measuring point measurement method and creep measuring mark measurement method, among which the creep measuring point measurement method is the most common.

[0004] For creep measurement methods, to ensure that each measurement is performed at a fixed location, creep measurement points are welded to both ends of the diameter of the pipe measurement section. The number of creep measurement points is generally symmetrically set to 2 groups (4 points) or 4 groups (8 points) according to the outer diameter of the pipe. Symmetrical setting can ensure the accuracy of measurement results. Since creep measurement data is relatively small, many factors can cause errors in the measurement results during the measurement process. Oxidation corrosion and wear damage of creep measurement points are among the important influencing factors, often leading to low creep measurement data or even "negative creep" phenomena.

[0005] Therefore, to reduce measurement errors caused by creep measurement points, these points are generally protected. Current technology typically uses a nut screwed onto the creep measurement point for protection. However, practice has shown that this method has several drawbacks: First, due to the long time interval between creep measurements, corrosion can occur between the creep measurement point and the nut, making the nut difficult to remove. Furthermore, the thermal expansion and deformation of the creep measurement point due to the high temperature of the steam pipe further increases the difficulty of nut removal, necessitating forceful unscrewing. However, this forceful unscrewing process can easily deform or damage the creep measurement point, leading to inaccurate creep data measurement and affecting the accuracy of the measurement results. Utility Model Content

[0006] The purpose of this application is to provide a protective device for creep measuring points in steam pipelines, so as to solve the technical problem that existing protective devices are prone to damage to creep measuring points, resulting in inaccurate creep data measurement.

[0007] This application provides a protective device suitable for creep measuring points in steam pipelines.

[0008] The protective device includes multiple arc-shaped pipe clamps, which are sequentially and tightly connected to form a ring around the outer periphery of the steam pipe. The number of arc-shaped pipe clamps is matched with the number of creep measuring points set on the steam pipe.

[0009] Furthermore, each of the arc-shaped pipe clamps is equipped with a protective cap, and each of the protective caps is used to accommodate the creep measuring points of the steam pipe one by one.

[0010] Furthermore, there is a gap between the inner wall of each protective cap and the outer wall of the creep measuring point it accommodates.

[0011] Furthermore, the curvature of the pipe wall of the arc-shaped pipe clamp is consistent with the curvature of the outer periphery of the steam pipe;

[0012] The arc-shaped pipe clamp is configured as an arc-shaped structure.

[0013] Furthermore, each of the protective caps is located at the center of each of the arc-shaped pipe clamps.

[0014] Furthermore, each of the protective caps includes a first vertical wall and a second vertical wall that are arranged opposite to each other and spaced apart, and a first connecting wall whose opposite ends are respectively connected to the top of the first vertical wall and the top of the second vertical wall;

[0015] Each of the arc-shaped pipe clamps includes a first arc-shaped pipe segment and a second arc-shaped pipe segment, with the bottom of the first vertical wall and the bottom of the second vertical wall respectively connected to one end of the first arc-shaped pipe segment and one end of the second arc-shaped pipe segment.

[0016] Furthermore, a gap is left between the outer wall of each creep measuring point and the inner wall of the first vertical wall, the second vertical wall, and the first connecting wall of the protective cap that houses it; and / or

[0017] The first and second arc-shaped pipe segments of each of the arc-shaped pipe clamps are arranged symmetrically to the left and right of the center line of the protective cap.

[0018] Furthermore, the gap between the outer wall of the creep measuring point and the inner wall of the protective cap is between 0.5 mm and 2 mm.

[0019] Furthermore, each of the arc-shaped pipe clamps has a fastening connection structure at its opposite ends, which is used to connect with the fastening connection structure of the adjacent arc-shaped pipe clamp, and the fastening connection structure is a detachable connection structure.

[0020] Furthermore, the fastening connection structure includes fastening lugs symmetrically arranged at opposite ends of the arc-shaped pipe clamp. The fastening lugs are provided with threaded holes for fixing bolts to pass through the fastening connection. The fastening lugs of two adjacent arc-shaped pipe clamps are arranged opposite each other and are detachably connected and fixed to each other by the fixing bolts.

[0021] Furthermore, when two pairs of creep measuring points are symmetrically arranged on the outer periphery of the steam pipe, four arc-shaped pipe clamps are correspondingly matched and arranged symmetrically in a cross-shaped pattern.

[0022] When four pairs of creep measuring points are symmetrically arranged on the outer periphery of the steam pipe, eight arc-shaped pipe clamps are matched accordingly, and each arc-shaped pipe clamp is symmetrically arranged at its center.

[0023] Compared with the prior art, the protective device for creep measuring points of steam pipelines provided in this application includes multiple arc-shaped pipe clamps, which are sequentially and tightly connected to form a protective device for clamping the outer periphery of the steam pipeline. The number of arc-shaped pipe clamps matches the number of creep measuring points on the steam pipeline, and each arc-shaped pipe clamp is provided with a protective cap, which is used to accommodate each creep measuring point of the steam pipeline.

[0024] With this configuration, the protective caps provided by this application for each creep measuring point can provide long-term protection for each creep measuring point, effectively preventing oxidation, corrosion, and wear damage, and preventing low creep measurement data or even "negative creep" phenomena. Furthermore, the method of detachably connecting the arc-shaped pipe clamp to the outer circumference of the steam pipe facilitates disassembly. On the other hand, by not directly connecting and fixing the creep measuring point protection device to the creep measuring point, this effectively prevents the existing creep measuring point protection device (such as a nut) from directly fixing to the creep measuring point, which could lead to mutual corrosion under long-term creep measurements, making the protective nut difficult to remove. Simultaneously, it effectively protects the creep measuring point from damage, thus avoiding the problem of inaccurate creep measurement data caused by damage to the creep measuring point, ensuring the accuracy of creep deformation measurement. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the protective device provided in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the arc-shaped pipe clamp provided in the embodiment of this application;

[0028] Figure 3 This is a schematic cross-sectional view of a steam pipe equipped with creep measuring points, provided in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram illustrating the usage of the protective device provided in this application embodiment applied to a steam pipeline.

[0030] Figure label:

[0031] 100 - Protective devices;

[0032] 10-Arc-shaped pipe clamp;

[0033] 11-Protective cap;

[0034] 111 - First vertical wall;

[0035] 112 - Second vertical wall;

[0036] 113 - First connecting wall;

[0037] 12-gap;

[0038] 131 - First arc-shaped pipe section;

[0039] 132 - Second arc-shaped pipe section;

[0040] 141 - First fastening lug;

[0041] 142 - Second fastening lug;

[0042] 151 - First fixing bolt;

[0043] 152 - Second fixing bolt;

[0044] 21-First arc-shaped pipe clamp;

[0045] 211 - First Protective Cap;

[0046] 22-Second arc-shaped pipe clamp;

[0047] 221 - Second protective cap;

[0048] 23-Third arc-shaped pipe clamp;

[0049] 231 - Third Protective Helmet;

[0050] 24-Fourth arc-shaped pipe clamp;

[0051] 241-Fourth Protective Helmet;

[0052] 200-Steam pipe;

[0053] 201 - First creep measurement point;

[0054] 202 - Second creep measuring point;

[0055] 203 - Third creep measurement point;

[0056] 204 - Fourth creep measurement point. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of 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. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0059] 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 further defined and explained in subsequent figures.

[0060] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0061] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0062] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0064] like Figures 1 to 4 As shown, this application embodiment provides a protective device 100 for creep measuring points in a steam pipeline 200. For example... Figure 3As shown, the outer periphery of the steam pipe 200 is provided with multiple creep measuring points, such as the first creep measuring point 201 and the second creep measuring point 202 set at both ends of the diameter, and the third creep measuring point 203 and the fourth creep measuring point 204 set at both ends of the diameter. Of course, three, five, or other odd numbers of creep measuring points can also be set evenly. However, it is preferred to set the creep measuring points in pairs and symmetrically to ensure the accuracy of the creep measurement results. This is because the steam pipe 200 is generally a circular pipe structure. When subjected to high temperature and high pressure, the steam pipe 200 will deform along the diameter direction. If the creep measuring point is set in only one direction, the measurement results may be affected by the change in pipe shape, resulting in inaccurate data. Therefore, in order to comprehensively reflect the deformation of the pipe and ensure the accuracy of the creep measurement results, the creep measuring points are usually set in pairs and symmetrically at both ends of the diameter of the steam pipe 200.

[0065] like Figure 1 , Figure 2 and Figure 4 As shown, the protective device 100 provided in this embodiment includes a plurality of arc-shaped pipe clamps 10, and the number of arc-shaped pipe clamps 10 matches the number of creep measuring points set on the steam pipe 200. Each arc-shaped pipe clamp 10 is set in a one-to-one correspondence with each creep measuring point, and the protective device 100 is formed by the arc-shaped pipe clamps 10 being sequentially and tightly connected, and is clamped on the outer periphery of the steam pipe 200; and each arc-shaped pipe clamp 10 is provided with a protective cap 11, and each protective cap 11 is used to accommodate each creep measuring point of the steam pipe 200 in a one-to-one correspondence.

[0066] With this configuration, the protective caps 11 provided by the protective device 100 corresponding to each creep measuring point in this embodiment can provide long-term protection for each creep measuring point, effectively preventing oxidation, corrosion, and wear damage, and preventing low creep measurement data or even "negative creep" phenomena. Furthermore, the method of detachably connecting the arc-shaped pipe clamp 10 to the outer periphery of the steam pipe 200 in this embodiment facilitates disassembly. On the other hand, by not directly connecting and fixing the creep measuring point protection device to the creep measuring point, it effectively prevents the existing creep measuring point protection device (such as a nut) from being directly fixed to the creep measuring point, which would cause them to corrode each other under long-term creep measurement, making it difficult to disassemble the protective nut. At the same time, it effectively protects the creep measuring point from damage, thereby avoiding the problem of inaccurate creep measuring data caused by damage to the creep measuring point, and ensuring the accuracy of creep deformation measurement.

[0067] A further embodiment is, as follows: Figure 4As shown, there is a gap 12 between the inner wall of each protective cap 11 and the outer wall of the corresponding creep measuring point. With this arrangement, since the protective cap 11 and the creep measuring point do not come into contact with each other due to the gap 12, on the one hand, it further effectively prevents the protective cap 11 and the creep measuring point from rusting due to long-term contact, which would cause the problem of difficulty in disassembly. On the other hand, it also avoids the problem of the protective cap 11 being difficult to disassemble due to thermal expansion and deformation of the creep measuring point, leaving expansion space for the creep measuring point to undergo thermal expansion and deformation.

[0068] Specifically, the gap 12 between the inner wall of each protective cap 11 and the outer wall of the corresponding creep measuring point is preferably between 0.5mm and 2mm. The gap 12 is at least 0.5mm to ensure that the creep measuring point has enough space for normal thermal expansion, while the gap 12 should not exceed 2mm to avoid the distance between the protective cap 11 and the creep measuring point being too large, which would affect the long-term protection effect of the protective cap 11 on the creep measuring point.

[0069] Another further embodiment is, as Figure 4 As shown, the curvature of the pipe wall of each arc-shaped pipe clamp 10 is consistent with the curvature of the outer periphery of the steam pipe 200, thereby making the inner wall of the protective device 100 formed by each arc-shaped pipe clamp 10 fit more closely with the outer periphery of the steam pipe 200, improving the tightness of the fit, and thus improving the clamping strength and connection tightness. Furthermore, since the steam pipe 200 is generally a circular pipe structure, each arc-shaped pipe clamp 10 is correspondingly set as an arc-shaped structure.

[0070] In another further embodiment, the protective caps 11 are preferably located in the middle of the arc-shaped pipe clamps 10. On the one hand, this allows for precise protection of the creep measuring points, ensuring that the protective caps 11 are directly aligned with the creep measuring points, thus achieving accurate coverage and minimizing the impact of the external environment on the creep measuring points, thereby reducing measurement errors and further ensuring the accuracy of creep data. On the other hand, since the arc-shaped pipe clamps 10 are arc-shaped, when the protective caps 11 are located in the middle, the structures on both sides are symmetrically distributed, making the force more uniform when the entire protective device 100 is fixed to the steam pipe 200, thereby improving the overall stability of the protective device 100 and preventing deformation or loosening caused by uneven force. Furthermore, the protective caps 11 being located in the middle makes installation and disassembly easier, improving operational efficiency.

[0071] Regarding the structural design of the protective cap, one specific embodiment is as follows: Figure 2As shown, the protective cap 11 may specifically include a first vertical wall 111 and a second vertical wall 112 that are arranged opposite to each other and spaced apart, and a first connecting wall 113 whose opposite ends are respectively connected to the top of the first vertical wall 111 and the top of the second vertical wall 112; the arc-shaped pipe clamp 10 may specifically include a first arc-shaped pipe segment 131 and a second arc-shaped pipe segment 132, the bottom of the first vertical wall 111 and the bottom of the second vertical wall 112 are respectively connected to one end of the first arc-shaped pipe segment 131 and one end of the second arc-shaped pipe segment 132, and the other end of the first arc-shaped pipe segment 131 and the other end of the second arc-shaped pipe segment 132 may be connected to a fastening connection structure (such as a first fastening ear plate 141 and a second fastening ear plate 142).

[0072] Furthermore, preferably, a gap 12 is left between the outer wall of the creep measuring point and the inner walls of the first vertical wall 111, the second vertical wall 112, and the first connecting wall 113 of the protective cap 11 that houses it. This further ensures that the inner wall of each protective cap 11 does not come into contact with the outer wall of each creep measuring point, thereby effectively ensuring that each creep measuring point does not rust or suffer damage due to thermal expansion, ensuring the accuracy of long-term measurement results of each creep measuring point, and also serving to accommodate and protect each creep measuring point.

[0073] Furthermore, it is preferable that the first arc-shaped pipe segment 131 and the second arc-shaped pipe segment 132 of each arc-shaped pipe clamp 10 are symmetrically arranged on the left and right sides relative to the centerline of its protective cap 11. Since the arc-shaped pipe clamp 10 is arc-shaped, the first arc-shaped pipe segment 131 and the second arc-shaped pipe segment 132 on both sides are symmetrically distributed, so that when each arc-shaped pipe clamp 10 is fixed to the steam pipe 200, the force is more uniform, improving stability and avoiding deformation or loosening caused by uneven force.

[0074] An alternative embodiment is, as follows: Figure 1 , Figure 2 and Figure 4 As shown, each arc-shaped pipe clamp 10 may have a fastening connection structure at its opposite ends for connecting with the fastening connection structure of the adjacent arc-shaped pipe clamp 10. Preferably, the fastening connection structure is a detachable connection structure to facilitate quick disassembly.

[0075] In the foregoing embodiments, one specific embodiment is that the fastening connection structure may include a first fastening lug 141 and a second fastening lug 142 symmetrically arranged at opposite ends of the arc-shaped pipe clamp 10. Both the first fastening lug 141 and the second fastening lug 142 are provided with threaded holes for fixing bolts (such as the first fixing bolt 151 and the second fixing bolt 152) to pass through the fastening connection. The fastening lugs of two adjacent arc-shaped pipe clamps 10 are arranged opposite each other and are detachably connected and fixed to each other by fixing bolts, so that the protective device 100 can be firmly fixed to the steam pipe 200. Moreover, this assembly and connection method is convenient, simple, quick and reliable to disassemble.

[0076] Furthermore, the number of creep measuring points set on the steam pipe 200 is arranged according to the outer diameter of the steam pipe 200, and can be 2, 3, 4...8 or more. Two specific embodiments are given below for specific examples.

[0077] The first specific embodiment is, as follows: Figure 3 As shown, when the outer diameter of the steam pipe 200 is less than 350mm, two pairs of creep measuring points can be symmetrically arranged on the outer periphery of the steam pipe 200, namely the first creep measuring point 201 and the second creep measuring point 202 at both ends of the diameter, and the third creep measuring point 203 and the fourth creep measuring point 204 at both ends of the diameter. Four arc-shaped pipe clamps 10 are correspondingly matched, namely the first arc-shaped pipe clamp 21 and the second arc-shaped pipe clamp 22, and the third arc-shaped pipe clamp 23 and the fourth arc-shaped pipe clamp 24. The four arc-shaped pipe clamps 10 are arranged symmetrically in a cross center. The first creep measuring point 201, the second creep measuring point 202, the third creep measuring point 203 and the fourth creep measuring point 204 are respectively housed in the first protective cap 211, the second protective cap 221, the third protective cap 231 and the fourth protective cap 241 of the first arc-shaped pipe clamp 21, the second arc-shaped pipe clamp 22, the third arc-shaped pipe clamp 23 and the fourth arc-shaped pipe clamp 24.

[0078] The second specific embodiment is that when the outer diameter of the steam pipe 200 is greater than or equal to 350mm, four pairs of creep measuring points (i.e., eight creep measuring points) can be symmetrically arranged on the outer periphery of the steam pipe 200, and eight arc-shaped pipe clamps 10 are correspondingly matched and arranged. Each arc-shaped pipe clamp 10 is symmetrically arranged in the center, and the eight creep measuring points are respectively housed in the protective caps 11 of the eight arc-shaped pipe clamps 10.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A protective device for creep measuring points in steam pipelines, characterized in that, The protective device includes multiple arc-shaped pipe clamps, which are sequentially and tightly connected to form a ring around the outer periphery of the steam pipe. The number of arc-shaped pipe clamps is matched with the number of creep measuring points set on the steam pipe. Furthermore, each of the arc-shaped pipe clamps is equipped with a protective cap, and each of the protective caps is used to accommodate the creep measuring points of the steam pipe one by one.

2. The protective device for creep measuring points in steam pipelines according to claim 1, characterized in that, There is a gap between the inner wall of each protective cap and the outer wall of the creep measuring point it accommodates.

3. The protective device for creep measuring points in steam pipelines according to claim 2, characterized in that, The arc of the pipe wall of the arc-shaped pipe clamp is consistent with the outer circumferential arc of the steam pipe; The arc-shaped pipe clamp is configured as an arc-shaped structure.

4. The protective device for creep measuring points in steam pipelines according to claim 3, characterized in that, Each of the protective caps is located at the center of each of the arc-shaped pipe clamps.

5. The protective device for creep measuring points in steam pipelines according to claim 4, characterized in that, Each of the protective caps includes a first vertical wall and a second vertical wall that are arranged opposite to each other and spaced apart, and a first connecting wall whose opposite ends are respectively connected to the top of the first vertical wall and the top of the second vertical wall; Each of the arc-shaped pipe clamps includes a first arc-shaped pipe segment and a second arc-shaped pipe segment, with the bottom of the first vertical wall and the bottom of the second vertical wall respectively connected to one end of the first arc-shaped pipe segment and one end of the second arc-shaped pipe segment.

6. The protective device for creep measuring points in steam pipelines according to claim 5, characterized in that, A gap is left between the outer wall of each creep measuring point and the inner wall of the first vertical wall, the second vertical wall, and the first connecting wall of the protective cap that houses it; and / or The first and second arc-shaped pipe segments of each of the arc-shaped pipe clamps are arranged symmetrically to the left and right of the center line of the protective cap.

7. The protective device for creep measuring points in steam pipelines according to claim 2 or 6, characterized in that, The gap between the outer wall of the creep measuring point and the inner wall of the protective cap is between 0.5 mm and 2 mm.

8. The protective device for creep measuring points in steam pipelines according to any one of claims 1 to 6, characterized in that, Each of the arc-shaped pipe clamps has a fastening connection structure at its opposite ends, which is used to connect with the fastening connection structure of the adjacent arc-shaped pipe clamp, and the fastening connection structure is a detachable connection structure.

9. The protective device for creep measuring points in steam pipelines according to claim 8, characterized in that, The fastening connection structure includes fastening lugs symmetrically arranged at opposite ends of the arc-shaped pipe clamp. The fastening lugs are provided with threaded holes for fixing bolts to pass through the fastening connection. The fastening lugs of two adjacent arc-shaped pipe clamps are arranged opposite each other and are detachably connected and fixed to each other by the fixing bolts.

10. The protective device for creep measuring points in steam pipelines according to claim 1, characterized in that, When two pairs of creep measuring points are symmetrically arranged on the outer periphery of the steam pipe, four arc-shaped pipe clamps are correspondingly matched and arranged symmetrically in a cross-shaped center. When four pairs of creep measuring points are symmetrically arranged on the outer periphery of the steam pipe, eight arc-shaped pipe clamps are matched accordingly, and each arc-shaped pipe clamp is symmetrically arranged at its center.

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