Expansion joint convenient to install

Abstract

The utility model is applicable to the technical field of expansion joints, and provides an expansion joint convenient to install, which comprises an expansion joint body and a butt joint pipe which are in butt joint with each other, flanges I are fixedly connected to the side walls of the ends of the expansion joint body, and flanges II are fixedly connected to the side walls of the ends, close to the expansion joint body, of the butt joint pipe. At least two fixing blocks are oppositely and fixedly connected to the side walls of the first flange and the second flange, inserting holes are formed in the side walls of the fixing blocks, pre-locking assemblies can be inserted into the adjacent inserting holes so that the first flange and the second flange can be conveniently installed and connected, and limiting assemblies can also be installed in the adjacent inserting holes so as to protect the expansion joint body; the first flange and the second flange are tightly attached together, meanwhile, the fixing blocks on the first flange and the second flange coincide and are in butt joint synchronously, at the moment, the pre-locking column can be inserted into the inserting holes of the two fixing blocks, and the two fixing blocks can be fixed together through the pre-locking column by moving a part of the locking block in the second moving groove into the locking hole, so that the first flange and the second flange can be conveniently installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of expansion joints, and in particular relates to an expansion joint which is easy to install. Background Art

[0002] An expansion joint is a flexible component that effectively compensates for axial deformation. For example, an expansion joint welded to the shell of a fixed tube-sheet heat exchanger exhibits high axial flexibility and is easily deformed. This compensates for the differential thermal expansion between the tubes and shell due to varying wall temperatures, reducing axial loads and, consequently, thermal stresses in the tubes, tubesheet, and shell, thereby preventing damage from strength, instability, and tube pull-out. There are many different types of expansion joints, with common ones including corrugated, ring-plate welded, and sandwich structures.

[0003] Chinese utility model patent application number 202121599866.0 discloses a double-layer expansion joint that is easy to install. It includes a bellows and connecting seats arranged at both ends of the bellows. A guide screw is provided between the connecting seats on both sides. A sleeve is provided on one side of the connecting seat. A holder is fixed to one side of the sleeve. A pipe interface is provided on one side of the holder. A clamping block is provided on one side of the pipe interface. A self-locking inclined surface is provided on one side of the clamping block. A friction plate is provided on the self-locking inclined surface. A slot adapted for the clamping block is provided in the clamping block. The utility model quickly connects the pipe and the expansion joint by rotating the buckle. It has a simple structure and is locked with the self-locking inclined surface and friction plate. It is reliable to install and has good sealing performance, which greatly improves the practicality of the equipment.

[0004] However, the above utility model patent still has some shortcomings:

[0005] During use of the above utility model patent, the pipe interface is inserted into the card slot through the card block, and is locked with the self-locking bevel and the friction plate to dock with the sleeve. On the one hand, this connection method is prone to loosening of the interface during multiple disassembly and installation. On the other hand, the method of locking with the friction plate and the self-locking bevel is more laborious during disassembly. In addition, it is inconvenient to set a protective mechanism on the outside of the expansion joint, which makes the telescopic part of the expansion joint easy to be damaged during transportation and operation. Utility Model Content

[0006] The utility model provides an expansion joint that is easy to install, aiming to solve the problems mentioned in the above background technology.

[0007] The utility model is achieved in this way: an expansion joint that is easy to install includes an expansion joint body and a butt joint pipe that are butt jointed with each other, a flange 1 is fixedly connected to the end side wall of the expansion joint body, a flange 2 is fixedly connected to the end side wall of the butt joint pipe close to the expansion joint body, no less than two fixing blocks are relatively fixed to the side walls of the flange 1 and the flange 2, and the side walls of the fixing blocks are provided with insertion holes, and pre-locking components can be inserted into adjacent said insertion holes to facilitate the installation and connection of the flange 1 and the flange 2, and limiting components can also be installed in adjacent said insertion holes to protect the expansion joint body.

[0008] Preferably, the pre-locking component includes a pre-locking column, which can be inserted into the socket in the adjacent fixed block, and a locking hole is relatively opened on the inner wall of the socket, and a movable groove 2 corresponding to the locking hole is opened on the side wall of the pre-locking column, and a locking block is slidably set in each of the movable grooves 2, and a part of the locking block slides from the movable groove 2 into the locking hole to fix the pre-locking column and the fixed block together.

[0009] Preferably, a movable groove 1 is opened at the axial center line position of the pre-locking column, and the movable groove 1 is connected to the movable groove 2. A rounded block is fixedly connected to the inner wall of the movable groove 2 near the movable groove 1, and a spring is provided between the rounded block and the locking block. A connecting rope is fixedly connected between the locking blocks in the same fixed block, and the spring is sleeved outside the connecting rope. The connecting rope is transmission-connected to the splint column, and the splint column is inserted into the movable groove 1.

[0010] Preferably, a pull ring is fixedly connected to the end of the splint column outside the movable groove, a connecting column is fixedly connected between the splints of the splint column, the connecting column is arranged on the side of the connecting rope away from the pull ring, and a connecting ring is fixedly connected to the side wall of the pre-locking column close to the pull ring.

[0011] Preferably, the limiting assembly includes a threaded rod, which can be inserted into all the jacks on the same horizontal line, and a nut 1 is screwed on the side wall of the threaded rod and on both sides of the flange 1 and the flange 2.

[0012] Preferably, a plurality of mounting holes are provided on the side walls of the flange 1 and the flange 2, and the flange 1 and the flange 2 are fastened together by inserting a bolt and a nut 2 threadedly connected to each other into each mounting hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Flange one and flange two are tightly pressed together, and the fixed blocks on them are synchronously overlapped and docked. At this time, the pre-locking column can be inserted into the sockets of the two fixed blocks. By moving a part of the locking block in the movable groove two into the locking hole, the two fixed blocks can be fixed together through the pre-locking column to facilitate the installation of flange one and flange two.

[0015] Nut 1 can be rotated on the threaded rod to adjust its position on the side wall of the threaded rod, so as to adjust the distance between the nuts 1 on the left and right sides of the flange, so as to ensure that the expansion joint body can expand and contract between the two nuts 1, and at the same time, the expansion joint body is protected by the threaded rod.

[0016] The bolts are inserted into the mounting holes of flange 1 and flange 2 which are tightly fitted together, and are fastened by nut 2 to butt the butt joint and the expansion joint body together, making it easier to disassemble them later. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the utility model (the pre-locking column is inserted into the fixed block);

[0018] Figure 2 It is a schematic diagram of the flange in the utility model;

[0019] Figure 3 For this utility model Figure 1 AA section diagram;

[0020] Figure 4 This is a front view of the present invention (the threaded rod is inserted into the fixed block);

[0021] In the picture:

[0022] 1. Expansion joint body; 2. Butt joint; 3. Flange 1; 4. Flange 2; 5. Fixing block; 51. Socket; 52. Lock hole;

[0023] 6. Pre-locking assembly; 61. Pre-locking column; 62. Moving groove 1; 63. Moving groove 2; 64. Clamping column; 65. Connecting column; 66. Connecting rope; 67. Locking block; 68. Spring; 69. Rounded block; 610. Pull ring; 611. Connecting ring;

[0024] 7. Limit assembly; 71. Threaded rod; 72. Nut 1; 8. Mounting hole; 9. Bolt; 10. Nut 2. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] See also Figure 1-4 The utility model provides a technical solution: an expansion joint that is easy to install, comprising an expansion joint body 1 and a butt joint pipe 2 that are butt jointed with each other, a flange 1 3 being fixedly connected to the end side wall of the expansion joint body 1, a flange 2 4 being fixedly connected to the end side wall of the butt joint pipe 2 close to the expansion joint body 1, and no less than two fixing blocks 5 being relatively fixedly connected to the side walls of the flange 1 3 and the flange 2 4, each of the fixing blocks 5 having a plug hole 51 formed on its side wall, and a pre-locking component 6 can be inserted into adjacent plug holes 51 to facilitate the installation and connection of the flange 1 3 and the flange 2 4, and a limiting component 7 can also be installed in the adjacent plug holes 51 to protect the expansion joint body 1.

[0031] like Figure 2As shown, three fixing blocks 5 are evenly distributed and fixed on the curved side walls of the flanges (flange 1 3, flange 2 4). Pre-locking components 6 are inserted into the fixing blocks 5 on the same horizontal line on the flanges to pre-lock the adjacent flanges 1 3 and flange 2 4 together, so that the operator can easily install the expansion joint body 1 and the butt pipe 2 together through bolts 9 and nuts 2 10.

[0032] After the expansion joint body 1 and the butt-joint pipe 2 are installed together, the pre-locking assembly 6 is taken out from the fixed block 5, and then the limiting assembly 7 is installed into the fixed block 5. On the one hand, it ensures that the expansion joint body 1 can expand and contract horizontally to a certain extent, and on the other hand, it protects the telescopic part of the expansion joint body 1.

[0033] Furthermore, the pre-locking assembly 6 includes a pre-locking column 61, which can be inserted into the socket 51 in the adjacent fixed block 5. A locking hole 52 is relatively opened on the inner wall of the socket 51, and a movable groove 2 63 corresponding to the locking hole 52 is opened on the side wall of the pre-locking column 61. A locking block 67 is slidably set in each movable groove 2 63, and a part of the locking block 67 slides from the movable groove 2 63 to the locking hole 52 to fix the pre-locking column 61 and the fixed block 5 together.

[0034] Specifically, flange 1 3 and flange 2 4 are tightly pressed together, and the fixed blocks 5 on them are synchronously pressed together. At this time, the pre-locking column 61 can be inserted into the insertion hole 51 of the two fixed blocks 5. By moving a part of the locking block 67 in the movable groove 2 63 into the locking hole 52, the two fixed blocks 5 can be fixed together through the pre-locking column 61 to facilitate the installation of flange 1 3 and flange 2 4.

[0035] Furthermore, a movable groove 1 62 is opened at the axial center line position of the pre-locking column 61, and the movable groove 1 62 is connected to the movable groove 2 63. A rounded block 69 is fixedly connected to the inner wall of the movable groove 2 63 near the movable groove 1 62, and a spring 68 is arranged between the rounded block 69 and the locking block 67. A connecting rope 66 is fixedly connected between the locking blocks 67 in the same fixed block 5, and the spring 68 is arranged on the outside of the connecting rope 66. The connecting rope 66 is transmission-connected to the splint column 64, and the splint column 64 is inserted into the movable groove 1 62.

[0036] like Figure 3 As shown, the operator controls the splint column 64 to move in the movable groove 1 62 so as to synchronously drive the connecting rope 66 to move. When the connecting rope 66 moves, it drives the connected locking block 67 to retract into the movable groove 2 63, and the spring 68 contracts synchronously. At this time, the pre-locking column 61 can be inserted into the socket 51.

[0037] The control on the splint column 64 is released, and under the action of the elastic force of the spring 68, the locking block 67 moves from the second moving groove 63 to the locking hole 52 to complete the pre-locking.

[0038] The provision of the rounded corner block 69 reduces the friction between the connecting rope 66 and the inner wall of the moving groove during movement, reduces wear and tear, and increases the service life of the connecting rope 66.

[0039] Furthermore, a pull ring 610 is fixedly connected to the end of the splint column 64 outside the movable groove 1 62, and a connecting column 65 is fixedly connected between the splints of the splint column 64. The connecting column 65 is arranged on the side of the connecting rope 66 away from the pull ring 610, and a connecting ring 611 is fixedly connected to the side wall of the pre-locking column 61 close to the pull ring 610.

[0040] Specifically, the operator pulls the splint column 64 outward through the pull ring 610 , and simultaneously drives the connecting rope 66 to move through the connecting column 65 to pull the locking block 67 to retract in the second moving groove 63 .

[0041] The operator inserts the ring finger and index finger into the two connecting rings 611 with one hand respectively, and inserts the middle finger into the pull ring 610 so that the pull ring 610 can be moved by bending the middle finger. The one-handed operation is more convenient and quick.

[0042] Furthermore, the limiting assembly 7 includes a threaded rod 71, which can be inserted into all the jacks 51 on the same horizontal line. Nuts 1 72 are screwed on the side walls of the threaded rod 71 and on both sides of flange 1 3 and flange 2 4.

[0043] Specifically, the radius of the insertion hole 51 is slightly larger than the radius of the threaded rod 71, so that the threaded rod 71 can be movably inserted into the insertion hole 51. Figure 4 shown.

[0044] The nut 1 72 can be rotated on the threaded rod 71 to adjust its position on the side wall of the threaded rod 71 to adjust the distance between the nuts 1 72 on the left and right sides of the flange to ensure that the expansion joint body 1 can expand and contract between the two nuts 1 71.

[0045] Furthermore, a plurality of mounting holes 8 are provided on the side walls of flange 1 3 and flange 2 4 , and flange 1 3 and flange 2 4 are fastened together by inserting a bolt 9 and a nut 10 threadedly connected to each other into each mounting hole 8 .

[0046] Specifically, the bolts 9 are inserted into the mounting holes 8 of the flange 1 3 and the flange 2 4 which are tightly attached to each other, and are fastened by the nut 2 10 to connect the butt joint 2 and the expansion joint body 1 together, so as to facilitate subsequent disassembly.

[0047] The working principle and use process of the utility model are as follows: After the utility model is installed, the expansion joint body 1 and the butt joint 2 are butted together, and the fixing blocks 5 are overlapped and pressed tightly together.

[0048] The operator inserts the ring finger and index finger into the two connecting rings 611 with one hand respectively, inserts the middle finger into the pull ring 610 and bends and pulls the pull ring 610 to move, and the splint column 64 simultaneously drives the connecting column 65 and the connecting rope 66 to move to pull the locking block 67 into the movable groove 2 63 to retract, and the spring 68 is compressed at the same time.

[0049] Insert the pre-locking column 61 into the socket 51, loosen the pull ring 610, and under the action of the elastic force of the spring 68, the locking block 67 moves from the movable groove 2 63 to the locking hole 52, completing the pre-locking between flange 1 3 and flange 2 4.

[0050] The bolts 9 are inserted into the mounting holes 8 of the flange 1 3 and the flange 2 4 which are tightly attached to each other, and are fastened by the nut 2 10 to complete the docking installation of the butt joint 2 and the expansion joint body 1.

[0051] The operator then removes the pre-locking column 61 , inserts the threaded rod 71 into the insertion hole 51 , and adjusts the position of the nut 1 72 .

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An expansion joint that is easy to install, characterized by: The invention comprises an expansion joint body (1) and a butt joint pipe (2) that are butt jointed with each other, wherein flange 1 (3) is fixedly connected to the end side wall of the expansion joint body (1), flange 2 (4) is fixedly connected to the end side wall of the butt joint pipe (2) close to the expansion joint body (1), and no less than two fixing blocks (5) are relatively fixedly connected to the side walls of flange 1 (3) and flange 2 (4), and the side walls of the fixing blocks (5) are provided with insertion holes (51), and pre-locking components (6) can be inserted into adjacent insertion holes (51) to facilitate the installation and connection of flange 1 (3) and flange 2 (4), and limiting components (7) can also be installed in adjacent insertion holes (51) to protect the expansion joint body (1).

2. An expansion joint that is easy to install as claimed in claim 1, characterized in that: The pre-locking assembly (6) includes a pre-locking column (61), which can be inserted into the insertion hole (51) in the adjacent fixed block (5), and a locking hole (52) is relatively opened on the inner wall of the insertion hole (51), and a movable groove (63) corresponding to the locking hole (52) is opened on the side wall of the pre-locking column (61), and a locking block (67) is slidably set in each of the movable grooves (63), and a part of the locking block (67) slides from the movable groove (63) to the locking hole (52) to fix the pre-locking column (61) and the fixed block (5) together.

3. An expansion joint that is easy to install as claimed in claim 2, characterized in that: A movable groove (62) is provided at the axial centerline position of the pre-locking column (61), and the movable groove (62) is connected to the movable groove (63). A rounded block (69) is fixedly connected to the inner wall of the movable groove (62) near the movable groove (63), and a spring (68) is provided between the rounded block (69) and the locking block (67). A connecting rope (66) is fixedly connected between the locking blocks (67) in the same fixed block (5), and the spring (68) is sleeved on the outside of the connecting rope (66). The connecting rope (66) is transmission-connected to the splint column (64), and the splint column (64) is inserted into the movable groove (62).

4. An expansion joint that is easy to install as claimed in claim 3, characterized in that: A pull ring (610) is fixedly connected to the end of the splint column (64) outside the movable groove (62), and a connecting column (65) is fixedly connected between the splints of the splint column (64). The connecting column (65) is arranged on the side of the connecting rope (66) away from the pull ring (610), and a connecting ring (611) is fixedly connected to the side wall of the pre-locking column (61) close to the pull ring (610).

5. The expansion joint that is easy to install as claimed in claim 1, characterized in that: The limiting assembly (7) includes a threaded rod (71) which can be inserted into all the insertion holes (51) on the same horizontal line. Nuts (72) are screwed on the side walls of the threaded rod (71) and on both sides of flange one (3) and flange two (4).

6. The expansion joint that is easy to install as claimed in claim 1, characterized in that: A plurality of mounting holes (8) are provided on the side walls of the flange 1 (3) and the flange 2 (4), and the flange 1 (3) and the flange 2 (4) are fastened together by inserting a bolt (9) and a nut 2 (10) threadedly connected to each other into each mounting hole (8).

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