Impact-resistant pipeline expansion joint for power station

Abstract

The utility model relates to the technical field of pipeline expansion joints, and discloses an impact-resistant pipeline expansion joint for a power station, which solves the problem that a buffer rod is inconvenient to mount quickly at present, and comprises a corrugated pipe, a buffer mechanism is mounted in the corrugated pipe, and flange plates are fixedly mounted at two ends of the corrugated pipe. Limiting rods are installed between the two flange plates at equal angles, and the buffering mechanism comprises an inner ring located in the corrugated pipe. According to the buffer rod, through cooperation of an inner ring, a first fixing ring, a U-shaped round rod and a spring, a first connecting ring can move conveniently, then two inserting blocks can be inserted into two inserting grooves respectively, and therefore the buffer rod can be rapidly installed conveniently, water flow can penetrate through a through hole in the buffer rod, impact force of the water flow on the inner wall of the corrugated pipe can be reduced conveniently, and the service life of the corrugated pipe is prolonged. And meanwhile, the buffer rod rotates along with the impact of the water flow, so that the impact force of the water flow can be further reduced, and the corrugated pipe can be conveniently protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline expansion joints, in particular to an impact-resistant pipeline expansion joint for power stations. Background Art

[0002] An expansion joint refers to a flexible element that can effectively compensate for axial deformation. For example, the expansion joint welded on the fixed tube sheet heat exchanger shell has large axial flexibility and is easy to deform. It can compensate for the thermal expansion difference between the tube and the shell due to different wall temperatures, reduce their axial load, and thus reduce the temperature difference stress of the tube, tube sheet and shell, and avoid strength damage, instability damage and tube pull-off damage. There are many types of expansion joints, and the commonly used ones are corrugated, ring plate welding and clamp shell structures. Among them, corrugated expansion joints are the most widely used, and corrugated expansion joints are also used in power stations; according to the patent document with the authorization announcement number of CN219282721U and the name of "an impact-resistant and wear-resistant expansion joint", through the action of the buffer rod, the water flows through the through hole on the surface of the buffer rod, which can greatly reduce the impact force of the water flow on the inner wall of the expansion joint body. At the same time, when the water flow drives the buffer rod to move, the rotating shaft at the bottom of the buffer rod can make the buffer rod rotate with the impact of the water flow, which can further reduce the impact force of the water flow, thereby protecting the expansion joint body; but there are still the following defects:

[0003] The buffer rod is used to reduce the impact force of the water flow. It is necessary to first insert each limit bar into each limit groove, and then fix the limit bar by multiple screws to achieve the installation of the buffer rod. Therefore, multiple operations are required, which makes the operation cumbersome and inconvenient to quickly install the buffer rod. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an impact-resistant pipeline expansion joint for power stations, which effectively solves the problem that it is currently inconvenient to quickly install the buffer rod.

[0005] To achieve the above object, the utility model provides the following technical solutions: an impact-resistant power station pipeline expansion joint, comprising a bellows, a buffer mechanism is installed inside the bellows, flanges are fixedly installed at both ends of the bellows, and a limit rod is installed at an equal angle between the two flanges;

[0006] The buffer mechanism includes an inner ring located in the bellows, a connecting ring 1 is provided on the inner ring, a connecting ring 2 is provided inside the bellows, the connecting ring 2 is located on the side of the connecting ring 1 away from the inner ring, a connecting rod is fixedly connected to the connecting ring 1 at an equal angle, a buffer rod is rotatably connected to the connecting rod at an equal distance, and a plurality of through holes are opened on the buffer rod.

[0007] Preferably, a fixing ring 1 is fixedly installed inside the bellows, and the fixing ring 1 is located on the side of the inner ring away from the connecting ring 2. A U-shaped round rod is fixedly installed on the side of the inner ring away from the connecting ring 2. The U-shaped round rod penetrates the fixing ring 1 and is movably connected to the fixing ring 1. Two springs are symmetrically fixedly connected between the inner ring and the fixing ring 1, and the two springs are both mounted on the outside of the U-shaped round rod.

[0008] Preferably, an annular groove is provided on the inner side of the inner ring, and a mounting ring three is provided inside the bellows, and the mounting ring three is rotatably connected to the inner ring via the annular groove, and a mounting ring two is fixedly installed on the side of the mounting ring three away from the fixing ring one, and a mounting ring one is fixedly installed on the side of the mounting ring two away from the mounting ring three, and both the mounting ring one and the mounting ring two are not in contact with the inner ring, and a side of the connecting ring one away from the connecting ring two is in contact with the mounting ring one.

[0009] Preferably, two positioning holes are symmetrically provided on one side of the mounting ring 1 away from the mounting ring 2, and two positioning columns are symmetrically fixedly installed on one side of the connecting ring 1 away from the connecting ring 2, and the two positioning columns are respectively inserted into the two positioning holes.

[0010] Preferably, a fixing ring 2 is fixedly installed inside the bellows, and the fixing ring 2 is sleeved on the outside of the connecting ring 2. Two through grooves are symmetrically provided on the inner side of the fixing ring 2, and two slots are symmetrically provided on the side of the fixing ring 2 close to the connecting ring 1. Two plug-in blocks are symmetrically fixedly installed on the outer side of the connecting ring 2, and the two plug-in blocks are respectively located in the two slots.

[0011] Preferably, balls are installed at equal angles on both sides of the annular groove, and two groups of balls are respectively fitted on both sides of the mounting ring three.

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

[0013] (1) The utility model facilitates the placement of the connecting ring 1 on the mounting ring 1 through the cooperation between the positioning hole and the positioning column, and facilitates the rotation of the connecting ring 1 through the cooperation between the mounting ring 3 and the annular groove, and facilitates the movement of the connecting ring 1 through the cooperation between the inner ring and the fixing ring 1 and the U-shaped round rod and the spring, thereby facilitating the insertion of the two plug blocks into the two slots respectively, thereby facilitating the rapid installation of the buffer rod, allowing the water flow to pass through the through hole on the buffer rod, thereby facilitating the reduction of the impact force of the water flow on the inner wall of the bellows, and at the same time, the buffer rod rotates with the impact of the water flow, thereby further reducing the impact force of the water flow, thereby facilitating the protection of the bellows;

[0014] (2) The novel device reduces the contact area between the mounting ring 3 and the inner wall of the annular groove by arranging a plurality of balls on both sides of the mounting ring 3, thereby facilitating the reduction of the friction force on the connecting ring 1 when it rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a 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 to the present invention.

[0016] In the attached picture:

[0017] Figure 1 This is a schematic diagram of the structure of the utility model of impact-resistant power station pipeline expansion joint;

[0018] Figure 2 This is a schematic diagram of the structure of the buffer mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the connecting rod structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the second fixing ring of the utility model;

[0021] Figure 5 This is a schematic diagram of the inner ring structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the disassembled structure of the inner ring of the utility model.

[0023] In the figure: 1. bellows; 2. buffer mechanism; 201. inner ring; 202. fixing ring 1; 203. connecting ring 1; 204. buffer rod; 205. connecting ring 2; 206. fixing ring 2; 207. connecting rod; 208. positioning column; 209. through hole; 2010. plug-in block; 2011. through groove; 2012. slot; 2013. U-shaped round rod; 2014. mounting ring 1; 2015. spring; 2016. ball; 2017. positioning hole; 2018. mounting ring 2; 2019. annular groove; 2020. mounting ring 3; 3. limit rod; 4. flange. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Embodiment 1, by Figure 1 The utility model comprises a bellows 1, a buffer mechanism 2 is installed inside the bellows 1, flanges 4 are fixedly installed at both ends of the bellows 1, and a limit rod 3 is installed at an equal angle between the two flanges 4.

[0026] Specifically, by Figure 2-6The buffer mechanism 2 includes an inner ring 201 located in the bellows 1, a connecting ring 1 203 is provided on the inner ring 201, a connecting ring 205 is provided inside the bellows 1, the connecting ring 205 is located on the side of the connecting ring 1 203 away from the inner ring 201, a connecting rod 207 is fixedly connected at an equal angle between the connecting ring 205 and the connecting ring 1 203, a buffer rod 204 is rotatably connected to the connecting rod 207 at an equal distance, and a plurality of through holes 209 are opened on the buffer rod 204, a fixing ring 202 is fixedly installed inside the bellows 1, and the fixing ring 202 is located inside The ring 201 is away from the side of the connecting ring 205, and the inner ring 201 is fixedly installed with a U-shaped round rod 2013 on the side away from the connecting ring 205. The U-shaped round rod 2013 penetrates the fixing ring 1 202 and is movably connected to the fixing ring 1 202. Two springs 2015 are symmetrically fixedly connected between the inner ring 201 and the fixing ring 1 202. Both springs 2015 are sleeved on the outside of the U-shaped round rod 2013. An annular groove 2019 is provided on the inner side of the inner ring 201. A mounting ring 3 2020 is provided inside the bellows 1. The mounting ring 3 2020 is connected to the fixing ring 1 through the annular groove 2019. The inner ring 201 is rotatably connected, and a mounting ring 2018 is fixedly installed on a side of the mounting ring 3 2020 away from the fixing ring 1 202, and a mounting ring 1 2014 is fixedly installed on a side of the mounting ring 2 2018 away from the mounting ring 3 2020, and neither the mounting ring 1 2014 nor the mounting ring 2 2018 contacts the inner ring 201, and a side of the connecting ring 1 203 away from the connecting ring 2 205 is fitted with the mounting ring 1 2014, and a side of the mounting ring 1 2014 away from the mounting ring 2 2018 is symmetrically provided with two positioning holes 2017, and the connecting ring 1 203 away from the connecting ring 2 2 Two positioning posts 208 are symmetrically fixedly installed on one side of the bellows 1, and the two positioning posts 208 are respectively inserted into the two positioning holes 2017. A fixing ring 206 is fixedly installed inside the bellows 1. The fixing ring 206 is sleeved on the outer side of the connecting ring 205. Two through grooves 2011 are symmetrically arranged on the inner side of the fixing ring 206. Two slots 2012 are symmetrically arranged on one side of the fixing ring 206 close to the connecting ring 1 203. Two plug-in blocks 2010 are symmetrically fixedly installed on the outer side of the connecting ring 205, and the two plug-in blocks 2010 are respectively located in the two slots 2012;

[0027] In the use state, firstly, the connecting ring 1 203 is placed inside the bellows 1, and the connecting ring 205 is sleeved inside the fixing ring 206, so that the two plugs 2010 pass through the two through grooves 2011 respectively, until the two positioning posts 208 are respectively inserted into the two positioning holes 2017, and then the connecting ring 205 is pushed to drive the movement of the mounting ring 1 2014, and the movement of the inner ring 201 is driven by the mounting ring 2 218 and the mounting ring 3 2020. At this time, the U-shaped round rod 2013 moves, and the two springs 2015 are compressed until the two plugs 2010 Disengage from the two through grooves 2011 respectively, then rotate the connecting ring 205 90°, and then move the connecting ring 205 under the action of the elastic force of the two springs 2015 until the two plug blocks 2010 are respectively inserted into the two slots 2012, and finally quickly install the buffer rod 204 in the bellows 1, so that the water flows through the through hole 209 on the buffer rod 204, reducing the impact force of the water flow on the inner wall of the bellows 1. At the same time, the buffer rod 204 rotates with the impact of the water flow, which can further reduce the impact force of the water flow, thereby protecting the bellows 1.

[0028] Specifically, by Figure 6 It is shown that balls 2016 are installed at equal angles on both sides of the annular groove 2019, and two groups of balls 2016 are respectively fitted on both sides of the mounting ring 3 2020;

[0029] When in use, since the mounting ring three 2020 is rotatably connected to the inner ring 201 through the annular groove 2019, and a plurality of balls 2016 are provided on both sides of the mounting ring three 2020, the contact area between the mounting ring three 2020 and the inner wall of the annular groove 2019 is reduced, and finally the friction force received by the connecting ring one 203 during rotation is reduced.

Claims

1. An impact-resistant expansion joint for a power station pipeline, comprising a bellows (1), characterized in that: A buffer mechanism (2) is installed inside the bellows (1), flanges (4) are fixedly installed at both ends of the bellows (1), and a limit rod (3) is installed at an equal angle between the two flanges (4); The buffer mechanism (2) comprises an inner ring (201) located inside the bellows (1), a connecting ring 1 (203) being provided on the inner ring (201), a connecting ring 2 (205) being provided inside the bellows (1), the connecting ring 2 (205) being located on a side of the connecting ring 1 (203) away from the inner ring (201), a connecting rod (207) being fixedly connected at an equal angle between the connecting ring 2 (205) and the connecting ring 1 (203), a buffer rod (204) being rotatably connected to the connecting rod (207) at an equal distance, and a plurality of through holes (209) being provided on the buffer rod (204).

2. The impact-resistant expansion joint for a power station pipeline according to claim 1, characterized in that: A fixing ring 1 (202) is fixedly installed inside the bellows (1), the fixing ring 1 (202) is located on a side of the inner ring (201) away from the connecting ring 2 (205), a U-shaped round rod (2013) is fixedly installed on a side of the inner ring (201) away from the connecting ring 2 (205), the U-shaped round rod (2013) penetrates the fixing ring 1 (202) and is movably connected to the fixing ring 1 (202), two springs (2015) are symmetrically fixedly connected between the inner ring (201) and the fixing ring 1 (202), and the two springs (2015) are both sleeved on the outside of the U-shaped round rod (2013).

3. The impact-resistant pipe expansion joint for power station according to claim 1, characterized in that: An annular groove (2019) is provided on the inner side of the inner ring (201), and a mounting ring three (2020) is provided inside the bellows (1). The mounting ring three (2020) is rotatably connected to the inner ring (201) via the annular groove (2019). A mounting ring two (2018) is fixedly installed on the side of the mounting ring three (2020) away from the fixing ring one (202), and a mounting ring one (214) is fixedly installed on the side of the mounting ring two (218) away from the mounting ring three (220). Both the mounting ring one (214) and the mounting ring two (218) are not in contact with the inner ring (201), and a side of the connecting ring one (203) away from the connecting ring two (205) is in contact with the mounting ring one (214).

4. The impact-resistant expansion joint for a power station pipeline according to claim 3, characterized in that: The mounting ring 1 (214) is symmetrically provided with two positioning holes (217) on one side away from the mounting ring 2 (218), and the connecting ring 1 (203) is symmetrically fixedly provided with two positioning posts (208) on one side away from the connecting ring 2 (205), and the two positioning posts (208) are respectively inserted into the two positioning holes (2017).

5. The impact-resistant pipe expansion joint for power station according to claim 1, characterized in that: A second fixing ring (206) is fixedly installed inside the bellows (1), and the second fixing ring (206) is sleeved on the outside of the second connecting ring (205). Two through grooves (2011) are symmetrically provided on the inside of the second fixing ring (206), and two slots (2012) are symmetrically provided on the side of the second fixing ring (206) close to the first connecting ring (203). Two plug blocks (2010) are symmetrically fixedly installed on the outside of the second connecting ring (205), and the two plug blocks (2010) are respectively located in the two slots (2012).

6. The impact-resistant expansion joint for a power station pipeline according to claim 3, characterized in that: Balls (2016) are installed at equal angles on both sides of the annular groove (2019), and two groups of balls (2016) are respectively fitted with two sides of the mounting ring three (2020).

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