Adjustable large pull rod transverse bellow expansion joint

Abstract

The utility model relates to the technical field of bellow expansion joints, and particularly discloses an adjustable large-pull-rod transverse bellow expansion joint which comprises an expansion joint body, a first connecting piece is fixed to one end of the expansion joint body, and a second connecting piece is fixed to the other end of the expansion joint body. Adjusting mechanisms used for adjusting the expansion joint are fixed to the outer wall of the second connecting piece and the outer wall of the first connecting piece. And the adjusting mechanism comprises fixing rings, the number of the fixing rings is two, one fixing ring is fixed to the outer wall of the second connecting piece, a connecting pipe is connected to the interior of each fixing ring, a movable rod is telescopically connected to the interior of each connecting pipe, and the tail end of each movable rod is in threaded connection with a fixing nut. Through the arranged adjusting mechanism, the connecting pipe can be adjusted and tensioned, so that the tension spring in the connecting pipe generates different tensile forces, the buffering capacity of the expansion joint is adjusted, and the limiting effect can be achieved through the arranged limiting block.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated expansion joints, in particular to an adjustable large tie rod transverse corrugated expansion joint. Background Technique

[0002] The large tie rod transverse corrugated expansion joint is also known as the large tie rod transverse corrugated compensator. When the pipeline system undergoes lateral displacement due to thermal expansion and contraction or other factors, the large tie rod transverse corrugated expansion joint absorbs these displacements through the angular deflection of the corrugated pipe. At the same time, the large tie rod bears the internal pressure thrust and other additional external forces to ensure the stable operation of the compensator. After the compensator works and deforms, the large tie rod will play a role in restricting the deformation amount and protecting the corrugated pipe.

[0003] In the existing transverse expansion joints, the two ends of the corrugated pipe are generally connected to the inner walls of the two end pipe fittings, lacking protection for the corrugated hose, and the corrugated hose is easily damaged;

[0004] The existing patent (publication number: CN206846164U) discloses a transverse corrugated expansion joint, which includes an intermediate pipe, a left connecting pipe and a right connecting pipe. The left end of the intermediate pipe and the left connecting pipe are connected by a first corrugated hose, and the right end of the intermediate pipe and the right connecting pipe are connected by a second corrugated hose; a left ring plate is arranged on the left connecting pipe, a right ring plate is arranged on the right connecting pipe, and several large tie rods are connected between the left ring plate and the right ring plate. A first flow guide cylinder is arranged on the inner hole wall at the right end of the left connecting pipe; a second flow guide cylinder is arranged on the inner hole wall at the right end of the intermediate pipe. It is externally connected to the pipe wall through the corrugated hose, which is convenient for the installation of the corrugated hose. Then, the setting of the flow guide cylinder and the protective sleeve avoids internal and external damage to the corrugated hose.

[0005] In view of the above problems, although the solution given by the existing patent avoids internal and external damage to the corrugated hose by externally connecting the corrugated hose to the pipe wall, when the corrugated expansion joint is in use, it is not convenient to adjust, the damping effect is average, and it is easy to cause deformation of the corrugated pipe. Summary of the Invention

[0006] The purpose of the utility model is to provide an adjustable large tie rod transverse corrugated expansion joint, which can adjust and tighten the connecting pipe, so that the tension springs in the connecting pipe generate different tensions, and then adjust the buffering ability of the expansion joint. The limiting block arranged can play a limiting role to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: An adjustable large tie rod transverse corrugated expansion joint, including an expansion joint body, a first connecting piece is fixed at one end of the expansion joint body, a second connecting piece is fixed at the other end of the expansion joint body, and adjusting mechanisms for adjusting the expansion joint are fixed on the outer walls of the second connecting piece and the first connecting piece;

[0008] The adjusting mechanism includes a fixing ring. There are two groups of the fixing rings. One group of the fixing rings is fixed on the outer wall of the second connecting piece. A connecting pipe is connected inside the fixing ring. A movable rod is telescopically connected inside the connecting pipe. A fixing nut is threadedly connected to the end of the movable rod. A tension spring fixed to the movable rod is installed inside the connecting pipe. A limiting block is fixed on the outer wall of the movable rod.

[0009] Preferably, fixing holes are formed in the inner walls of the second connecting piece and the first connecting piece, and sealing rings are fixed on the side walls of the second connecting piece and the first connecting piece.

[0010] Preferably, a heat-insulating inner ring is fixed inside the expansion joint body, and a buffering mechanism for buffering the medium is installed inside the heat-insulating inner ring.

[0011] Preferably, the buffering mechanism includes a fixing plate. The fixing plate is fixed inside the heat-insulating inner ring, and through holes are formed in the fixing plate.

[0012] Preferably, a flow-limiting plate is arranged on one side of the fixing plate, and fixing blocks are fixed on the outer wall of the flow-limiting plate.

[0013] Preferably, a connecting rod penetrating through the inside of the fixing plate is fixed on the side wall of the fixing block, and a buffering spring is sleeved on the outer surface of the connecting rod.

[0014] Preferably, one end of the buffering spring is in abutting connection with the fixing plate, and the other end of the buffering spring is in abutting connection with a connecting block fixed to the connecting rod.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By means of the provided adjusting mechanism, the connecting pipe can be adjusted and tightened, so that different pulling forces are generated in the tension spring inside the connecting pipe, and further the buffering capacity of the expansion joint is adjusted. The provided limiting block can play a limiting role.

[0017] 2. By means of the provided buffering mechanism, the medium can be discharged normally through the through holes, and the connecting rod arranged on the fixing block is driven to move, so that the connecting block pushes the buffering spring to be compressed, which can play a buffering role when the medium flows. When the medium pressure is too low, the buffering spring will push the flow-limiting plate to reset, thereby sealing the through holes and preventing the external medium from flowing back. Description of the Drawings

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is the overall structure view of the present invention;

[0020] Figure 2 It is the semi-sectional structure schematic diagram of the connecting pipe of the present invention;

[0021] Figure 3 It is the semi-sectional structure schematic diagram of the expansion joint body of the present invention;

[0022] Figure 4 It is the semi-sectional structure schematic diagram of the fixing plate of the present invention.

[0023] Explanation of reference numerals:

[0024] 1. Expansion joint body; 2. First connecting member; 3. Second connecting member; 4. Fixed ring; 41. Connecting pipe; 42. Movable rod; 43. Fixed nut; 44. Tension spring; 45. Limiting block; 5. Fixed hole; 6. Sealing ring; 7. Heat-insulating inner ring; 8. Fixing plate; 81. Through hole; 82. Current-limiting plate; 83. Fixed block; 84. Connecting rod; 85. Buffer spring; 86. Connecting block. Specific embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] The present invention provides a technical solution:

[0027] Please refer to Figures 1 to 4 , an adjustable large tie rod transverse type corrugated expansion joint, including an expansion joint body 1, a first connecting member 2 is fixed at one end of the expansion joint body 1, a second connecting member 3 is fixed at the other end of the expansion joint body 1, and adjusting mechanisms for adjusting the expansion joint are fixed on the outer walls of the second connecting member 3 and the first connecting member 2;

[0028] The adjusting mechanism includes fixing rings 4. There are two groups of fixing rings 4. One group of fixing rings 4 is fixed on the outer wall of the second connecting piece 3. A connecting pipe 41 is connected inside the fixing ring 4. A movable rod 42 is telescopically connected inside the connecting pipe 41. A fixing nut 43 is threadedly connected to the end of the movable rod 42. A tension spring 44 fixed to the movable rod 42 is installed inside the connecting pipe 41. A limiting block 45 is fixed on the outer wall of the movable rod 42. Fixing holes 5 are formed in the inner walls of both the second connecting piece 3 and the first connecting piece 2. Sealing rings 6 are fixed on the side walls of both the second connecting piece 3 and the first connecting piece 2. A heat-insulating inner ring 7 is fixed inside the expansion joint body 1. A buffer mechanism for buffering the medium is installed inside the heat-insulating inner ring 7.

[0029] By adopting the above technical solution, before using the adjustable large tie-rod horizontal corrugated expansion joint, first place the expansion joint body 1 in a suitable position. Through the fixing holes 5 formed in the first connecting piece 2 and the second connecting piece 3, bolts can be used to connect the expansion joint to an external pipeline. The provided sealing ring 6 can play an auxiliary sealing role. Through the fixing rings 4 provided on the first connecting piece 2 and the second connecting piece 3, the connecting pipe 41 can be placed into one group of fixing rings 4, and then the movable rod 42 can be placed into the other group of fixing rings 4. The movable rod 42 and the connecting pipe 41 are fixed by the fixing nut 43. By turning the fixing nut 43, the connecting pipe 41 can be adjusted and tightened, so that the tension spring 44 in the connecting pipe 41 generates different tensile forces, thereby adjusting the buffering capacity of the expansion joint. The provided limiting block 45 can play a limiting role.

[0030] Specifically, as Figure 1 , Figure 3 and Figure 4 shown, the buffer mechanism includes a fixing plate 8. The fixing plate 8 is fixed inside the heat-insulating inner ring 7. A through hole 81 is formed inside the fixing plate 8. A flow-limiting plate 82 is provided on one side of the fixing plate 8. A fixing block 83 is fixed on the outer wall of the flow-limiting plate 82. A connecting rod 84 penetrating through the inside of the fixing plate 8 is fixed on the side wall of the fixing block 83. A buffer spring 85 is sleeved on the outer surface of the connecting rod 84. One end of the buffer spring 85 is in abutting connection with the fixing plate 8, and the other end of the buffer spring 85 is in abutting connection with a connecting block 86 fixed to the connecting rod 84.

[0031] By adopting the above technical solution, the heat-insulating inner ring 7 inside the expansion joint body 1 can play a heat-insulating role. Through the fixing plate 8 arranged inside the heat-insulating inner ring 7, when the medium flows inside the expansion joint, it will pass through the through hole 81 to push the flow-limiting plate 82 to move, so that the medium can be normally discharged through the through hole 81. Moreover, the connecting rod 84 arranged on the fixing block 83 is driven to move, so that the connecting block 86 pushes the buffer spring 85 to be compressed, which can play a buffering role when the medium flows. When the medium pressure is too low, the buffer spring 85 will push the flow-limiting plate 82 to reset, thereby sealing the through hole 81 and preventing the external medium from flowing back.

[0032] Working principle: Through the fixing holes 5 opened on the first connecting piece 2 and the second connecting piece 3, bolts can be used to connect this expansion joint with an external pipeline. Through the fixing rings 4 arranged on the first connecting piece 2 and the second connecting piece 3, the connecting pipe 41 is placed into a group of fixing rings 4, and then the movable rod 42 is placed into another group of fixing rings 4. The movable rod 42 and the connecting pipe 41 are fixed through the fixing nut 43. By screwing the fixing nut 43, the connecting pipe 41 can be adjusted and tightened, so that the tension spring 44 inside the connecting pipe 41 generates different tensile forces, thereby adjusting the buffering capacity of this expansion joint. The limiting block 45 arranged can play a limiting role. The heat-insulating inner ring 7 inside the expansion joint body 1 plays a heat-insulating role. Through the fixing plate 8 arranged inside the heat-insulating inner ring 7, when the medium flows inside the expansion joint, it will pass through the through hole 81 to push the flow-limiting plate 82 to move, so that the medium can be normally discharged through the through hole 81. Moreover, the connecting rod 84 arranged on the fixing block 83 is driven to move, so that the connecting block 86 pushes the buffer spring 85 to be compressed, which can play a buffering role when the medium flows. When the medium pressure is too low, the buffer spring 85 will push the flow-limiting plate 82 to reset, thereby sealing the through hole 81 and preventing the medium from flowing back.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable large tie rod transverse type corrugated expansion joint, comprising an expansion joint body (1), characterized in that: One end of the expansion joint body (1) is fixed with a first connecting piece (2), and the other end of the expansion joint body (1) is fixed with a second connecting piece (3). Adjusting mechanisms for adjusting the expansion joint are fixed to the outer walls of both the second connecting piece (3) and the first connecting piece (2). The adjusting mechanism includes fixing rings (4). There are two groups of the fixing rings (4). One group of the fixing rings (4) is fixed to the outer wall of the second connecting piece (3). A connecting pipe (41) is connected inside the fixing ring (4). A movable rod (42) is telescopically connected inside the connecting pipe (41). A fixing nut (43) is threadedly connected to the end of the movable rod (42). A tension spring (44) fixed to the movable rod (42) is installed inside the connecting pipe (41). A limiting block (45) is fixed to the outer wall of the movable rod (42). A heat-insulating inner ring (7) is fixed inside the expansion joint body (1). A buffering mechanism for buffering the medium is installed inside the heat-insulating inner ring (7). The buffering mechanism includes a fixing plate (8). The fixing plate (8) is fixed inside the heat-insulating inner ring (7). A through hole (81) is formed inside the fixing plate (8). A current-limiting plate (82) is arranged on one side of the fixing plate (8). A fixing block (83) is fixed to the outer wall of the current-limiting plate (82). A connecting rod (84) penetrating through the inside of the fixing plate (8) is fixed to the side wall of the fixing block (83). A buffering spring (85) is sleeved on the outer surface of the connecting rod (84). One end of the buffering spring (85) is in abutting connection with the fixing plate (8), and the other end of the buffering spring (85) is in abutting connection with a connecting block (86) fixed to the connecting rod (84).

2. The adjustable large tie rod transverse type corrugated expansion joint according to claim 1, characterized in that: Fixing holes (5) are formed in the inner walls of both the second connecting piece (3) and the first connecting piece (2). Sealing rings (6) are fixed to the side walls of both the second connecting piece (3) and the first connecting piece (2).

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