Expansion joint protection structure of circulating water pipeline of power plant

Abstract

This utility model relates to the field of expansion joint technology and discloses a protective structure for expansion joints in power plant circulating water pipelines, solving the problem of poor protective effect of current expansion joints. It includes a bellows, with an upper connecting flange fixedly connected to the top end of the bellows and a lower connecting flange fixedly connected to the bottom end. A protective mechanism is provided on the outside of the bellows, including a bottom protective cylinder located outside the bellows, a bottom groove on the bottom protective cylinder, an adjustable protective cylinder movably fitted inside the bottom groove, a top protective cylinder above the bottom protective cylinder, a top groove on the top protective cylinder, and an adjustable protective cylinder inserted into the top groove. This utility model, through the cooperation of the threaded cylinder, bottom protective cylinder, bottom groove, adjustable protective cylinder, top groove, top protective cylinder, side groove, and side block, can effectively protect the bellows, thereby improving the overall protective effect of the expansion joint.

Description

Technical Field

[0001] This utility model belongs to the field of expansion joint technology, specifically a protective structure for expansion joints in power plant circulating water pipelines. Background Technology

[0002] Expansion joints, also commonly known as compensators or expansion joints, consist of bellows and end pipes, supports, flanges, conduits, and other accessories that form their main working body. Expansion joints are flexible structures installed on the shells of containers or pipelines to compensate for additional stress caused by temperature differences and mechanical vibrations. They are also commonly used in power plant circulating water pipelines.

[0003] To reduce damage to expansion joints from scratches and impacts, pearl cotton is typically wrapped around the outer circumference of the bellows, and then galvanized iron sheet is wrapped around the outer circumference of the pearl cotton. The galvanized iron sheet is then secured with cable ties and positioned between the expansion joint and the tie rod. However, in actual production, it has been found that because the galvanized iron sheet is not fixed axially along the expansion joint, it slides along the expansion joint's axial direction during transportation, causing the expansion joint to lose its protective function. In addition, the galvanized iron sheet is relatively thin, while the metal expansion joint and its components are quite heavy. During transportation and hoisting, the impact force generated by its own weight far exceeds the protective capacity of the galvanized iron sheet and the buffering range of the pearl cotton. This means that while the expansion joint protective structure can effectively protect against general scratches, dropped tools, and personnel trampling, it offers very little protection against impacts during transportation and hoisting. This frequently results in dents and scratches on the surface of the bellows at the installation site, leading to the expansion joint assembly being returned to the factory for repair or even scrapped. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an expansion joint protection structure for power plant circulating water pipelines, which effectively solves the problem of poor protection effect of current expansion joints.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an expansion joint protection structure for a power plant circulating water pipeline, comprising a bellows, wherein an upper connecting flange is fixedly connected to the top end of the bellows, a lower connecting flange is fixedly connected to the bottom end of the bellows, and a protective mechanism is provided on the outside of the bellows.

[0006] The protective mechanism includes a bottom protective cylinder located outside the bellows, with a bottom groove on the bottom protective cylinder. An adjustable protective cylinder is movably sleeved in the bottom groove. A top protective cylinder is located above the bottom protective cylinder, with a top groove on the top protective cylinder. The adjustable protective cylinder is inserted into the top groove. Threaded cylinder 1 is fixedly connected to the ends of the bottom and top protective cylinders that are far apart from each other. Threaded cylinder 2 is fixedly connected to the sides of the lower and upper connecting flanges that are close to each other. Both threaded cylinder 2 are located outside the bellows, and the two threaded cylinder 1 are threadedly sleeved on the outside of the two threaded cylinder 2 respectively.

[0007] Preferably, the outer side of the bottom protective cylinder is provided with a side groove, and a side block is fixedly connected to the outer side of the adjustable protective cylinder, with the side block slidably connected to the side groove.

[0008] Preferably, a U-shaped rod is fixedly connected to the outer side of the side block, and a sliding plate is movably sleeved on the outer side of the U-shaped rod. Two springs are symmetrically fixedly connected between the sliding plate and the side block, and both springs are sleeved on the outer side of the U-shaped rod.

[0009] Preferably, a movable column is fixedly connected to the side of the slide block near the side block, and a screw is fixedly connected to the end of the movable column away from the slide block. The movable column passes through the side block and is movably connected to the side block.

[0010] Preferably, a vertical plate is fixedly connected to the top of the lower connecting flange, and the vertical plate is provided with multiple through holes, through which the screw passes.

[0011] Preferably, a nut is provided on the side of the upright plate away from the side block, and the nut is threaded onto the outside of the screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Through the cooperation between the threaded cylinder, bottom protective cylinder, bottom groove, adjusting protective cylinder, top groove, top protective cylinder, side groove and side block, the bellows can be effectively protected, thereby improving the protection effect of the entire expansion joint;

[0014] 2. By using the combination of U-shaped rod, sliding plate, spring, side block, movable column, screw, through hole and nut, the side block can be fixed to the vertical plate, so as to make it easy to adjust the length of the protective cylinder extending into the top groove according to the length of the bellows, thus making it easy to protect expansion joints of different lengths. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the expansion joint protection structure for the power plant circulating water pipeline of this utility model;

[0018] Figure 2 This is a schematic diagram of the corrugated pipe structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the protective mechanism structure of this utility model;

[0020] Figure 4This is a schematic diagram showing the disassembled structure of the bottom protective cylinder and the top protective cylinder of this utility model;

[0021] Figure 5 This is a schematic diagram of the side block structure of this utility model.

[0022] In the diagram: 1. Bellows; 2. Protective mechanism; 201. Bottom protective cylinder; 202. Adjustable protective cylinder; 203. Top protective cylinder; 204. Threaded cylinder one; 205. Top groove; 206. Side groove; 207. Side block; 208. Bottom groove; 209. Vertical plate; 2010. Nut; 2011. Through hole; 2012. Slide plate; 2013. U-shaped round rod; 2014. Spring; 2015. Movable column; 2016. Screw; 3. Lower connecting flange; 4. Upper connecting flange; 5. Threaded cylinder two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1, by Figure 1-2 The present invention relates to an expansion joint protection structure for a power plant circulating water pipeline, comprising a bellows 1, an upper connecting flange 4 fixedly connected to the top end of the bellows 1, a lower connecting flange 3 fixedly connected to the bottom end of the bellows 1, and a protective mechanism 2 provided on the outer side of the bellows 1.

[0025] Specifically, by Figure 2-4 The protective mechanism 2 includes a bottom protective cylinder 201 located outside the bellows 1. The bottom protective cylinder 201 has a bottom groove 208. An adjusting protective cylinder 202 is movably sleeved in the bottom groove 208. A top protective cylinder 203 is located above the bottom protective cylinder 201. A top groove 205 is located on the top protective cylinder 203. The adjusting protective cylinder 202 is inserted into the top groove 205. Threaded cylinder 1 204 is fixedly connected to the ends of the bottom protective cylinder 201 and the top protective cylinder 203 that are far apart from each other. Threaded cylinder 2 5 is fixedly connected to the sides of the lower connecting flange 3 and the upper connecting flange 4 that are close to each other. Both threaded cylinder 2 5 are located outside the bellows 1, and the two threaded cylinder 1 204 are threadedly sleeved on the outside of the two threaded cylinder 2 5 respectively. A side groove 206 is provided on the outside of the bottom protective cylinder 201. A side block 207 is fixedly connected to the outside of the adjusting protective cylinder 202. The side block 207 is slidably connected to the side groove 206.

[0026] In use, firstly, threaded sleeves 204 are threaded onto the outside of threaded sleeves 5 respectively until the two threaded sleeves 204 abut against the lower connecting flange 3 and the upper connecting flange 4 respectively. Then, the side block 207 slides along the side groove 206, causing the adjusting protective sleeve 202 to slide along the bottom groove 208, so that the adjusting protective sleeve 202 extends into the top groove 205. Finally, the bellows 1 is protected by the bottom protective sleeve 201, the adjusting protective sleeve 202, the top protective sleeve 203 and the threaded sleeve 204, thus improving the protection effect of the entire expansion joint.

[0027] Specifically, by Figure 5 As shown, a U-shaped round rod 2013 is fixedly connected to the outer side of the side block 207. A sliding plate 2012 is movably sleeved on the outer side of the U-shaped round rod 2013. Two springs 2014 are symmetrically fixedly connected between the sliding plate 2012 and the side block 207. Both springs 2014 are sleeved on the outer side of the U-shaped round rod 2013. A movable column 2015 is fixedly connected to the side of the sliding plate 2012 near the side block 207. A screw 2016 is fixedly connected to the end of the movable column 2015 away from the sliding plate 2012. The movable column 2015 passes through the side block 207 and is movably connected to the side block 207. A vertical plate 209 is fixedly connected to the top of the lower connecting flange 3. The vertical plate 209 is provided with multiple through holes 2011. The screw 2016 passes through the corresponding through holes 2011. A nut 2010 is provided on the side of the vertical plate 209 away from the side block 207. The nut 2010 is threaded onto the outer side of the screw 2016.

[0028] In use, first slide the slide plate 2012 along the U-shaped rod 2013, and drive the screw 2016 to move through the movable column 2015, so that the screw 2016 disengages from the corresponding through hole 2011. At this time, both springs 2014 are stretched. Then slide the side block 207 along the side groove 206, driving the adjusting protective cylinder 202 to move until it extends into the top groove 205. Then, the screw 2016 passes through the corresponding through hole 2011 under the elastic force of the two springs 2014. Then, put the nut 2010 on the outside of the screw 2016 and tighten it, so that the nut 2010 abuts against the upright plate 209, fixing the side block 207 to the upright plate 209. The length of the adjusting protective cylinder 202 extending into the top groove 205 can be adjusted according to the length of the bellows 1. Finally, it protects expansion joints of different lengths.

Claims

1. An expansion joint protection structure for a power plant circulating water pipeline, comprising a corrugated pipe (1), characterized in that: The top end of the corrugated pipe (1) is fixedly connected to an upper connecting flange (4), the bottom end of the corrugated pipe (1) is fixedly connected to a lower connecting flange (3), and a protective mechanism (2) is provided on the outside of the corrugated pipe (1). The protective mechanism (2) includes a bottom protective cylinder (201) located outside the bellows (1), a bottom groove (208) on the bottom protective cylinder (201), an adjustable protective cylinder (202) movably sleeved in the bottom groove (208), a top protective cylinder (203) above the bottom protective cylinder (201), a top groove (205) on the top protective cylinder (203), the adjustable protective cylinder (202) inserted into the top groove (205), a threaded cylinder (204) fixedly connected to the ends of the bottom protective cylinder (201) and the top protective cylinder (203) that are far apart from each other, and a threaded cylinder (5) fixedly connected to the sides of the lower connecting flange (3) and the upper connecting flange (4) that are close to each other, both threaded cylinders (5) are located outside the bellows (1), and the two threaded cylinders (204) are respectively threadedly sleeved on the outside of the two threaded cylinders (5).

2. The expansion joint protection structure for a power plant circulating water pipeline according to claim 1, characterized in that: The bottom protective cylinder (201) has a side groove (206) on its outer side, and the outer side of the adjusting protective cylinder (202) is fixedly connected to a side block (207), which is slidably connected to the side groove (206).

3. The expansion joint protection structure for a power plant circulating water pipeline according to claim 2, characterized in that: A U-shaped rod (2013) is fixedly connected to the outside of the side block (207). A sliding plate (2012) is movably sleeved on the outside of the U-shaped rod (2013). Two springs (2014) are symmetrically fixedly connected between the sliding plate (2012) and the side block (207). Both springs (2014) are sleeved on the outside of the U-shaped rod (2013).

4. The expansion joint protection structure for a power plant circulating water pipeline according to claim 3, characterized in that: A movable column (2015) is fixedly connected to the side of the slide plate (2012) near the side block (207). A screw (2016) is fixedly connected to the end of the movable column (2015) away from the slide plate (2012). The movable column (2015) passes through the side block (207) and is movably connected to the side block (207).

5. The expansion joint protection structure for a power plant circulating water pipeline according to claim 1, characterized in that: The top of the lower connecting flange (3) is fixedly connected to a vertical plate (209), and the vertical plate (209) is provided with multiple through holes (2011), through which the screw (2016) passes.

6. The expansion joint protection structure for a power plant circulating water pipeline according to claim 5, characterized in that: The upright plate (209) is provided with a nut (2010) on the side away from the side block (207), and the nut (2010) is threaded onto the outside of the screw (2016).

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