Directly-buried internal pressure type bellow expansion joint

Abstract

The utility model provides a direct burial internal pressure type bellow expansion joint which comprises an expansion joint body and two first mounting plates fixedly connected to the two ends of the expansion joint body respectively, a plurality of fixing blocks are fixedly connected to the two first mounting plates, the fixing blocks are symmetrically arranged on the two first mounting plates, and the first mounting plates are fixedly connected to the two first mounting plates. And a fixing rod is fixedly connected between the two fixing blocks which are arranged in pairs and located on the two first mounting plates, a cover plate is fixedly connected between the two first mounting plates, the expansion joint body is sleeved with the cover plate, and a plurality of elastic telescopic rods are rotationally connected to the first mounting plates. According to the directly-buried internal pressure type bellow expansion joint, through the arrangement of the locking blocks and the locking grooves, the connection mode of the expansion joint and a pipeline is replaced, flange plates and screws which are prone to corrosion in soil are not adopted any more, the service life of the expansion joint is prolonged, and installation and subsequent maintenance and replacement are more convenient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline systems, and particularly relates to a directly buried internal pressure type corrugated expansion joint. Background Art

[0002] An expansion joint, also known as a telescopic joint, compensator or bellows, is a mechanical device used in a pipeline system. Its main function is to absorb the change in pipeline length caused by factors such as temperature change, pressure fluctuation, mechanical vibration or installation error. The application of the expansion joint can prevent the pipeline system from being damaged due to the stress generated by these factors, thus ensuring the safe and long-term operation of the pipeline system.

[0003] An expansion joint is usually composed of a bellows made of metal or other synthetic materials. The bellows can expand and contract to absorb the thermal expansion and contraction of the pipeline. Corrugated expansion joints are generally divided into internal pressure type and external pressure type. Among them, the internal pressure type corrugated expansion joint mainly bears the fluid pressure inside the pipeline, that is, the pressure acts on the inside of the bellows, while the external pressure type expansion joint mainly bears the pressure outside the pipeline, that is, the pressure acts on the outside of the bellows.

[0004] When the directly buried internal pressure type corrugated expansion joint is constructed, it is directly buried underground. Before being buried, it is often connected to the water pipe through a flange and screws. The underground environment usually has a high humidity, which will cause the screws to be corroded, seriously affecting the operation of replacing or maintaining the expansion joint and the pipeline at this position.

[0005] In view of this, a directly buried internal pressure type corrugated expansion joint is proposed. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the problem that the flange and screws for connecting the water pipe of the traditional directly buried internal pressure type corrugated expansion joint are easily corroded in the soil, and to provide a directly buried internal pressure type corrugated expansion joint.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a direct-buried internal pressure corrugated expansion joint, comprising an expansion joint body and two first mounting plates respectively fixedly connected to the two ends of the expansion joint body, a plurality of fixed blocks are fixedly connected to the two first mounting plates, the plurality of fixed blocks are symmetrically arranged on the two first mounting plates, and a fixed rod is fixedly connected between two of the fixed blocks arranged in pairs on the two first mounting plates, a cover plate is fixedly connected between the two first mounting plates, the cover plate is sleeved outside the expansion joint body, a plurality of elastic telescopic rods are rotatably connected to the first mounting plate, the protruding ends of the elastic telescopic rods are fixedly connected to locking blocks, a second mounting plate is detachably mounted on the first mounting plate, a water pipe is fixedly connected to the second mounting plate, a plurality of mounting blocks are fixedly connected to the side of the second mounting plate away from the water pipe, and a locking groove for locking the locking rod block is provided on the mounting block.

[0008] Furthermore, the second mounting plate is provided with a plurality of channels whose sizes match those of the locking block and the elastic telescopic rod, and the channels are used for the locking block and the elastic telescopic rod to pass through so that the locking block reaches the position of the locking groove.

[0009] Furthermore, the mounting block is provided with a through slot having a size matching that of the locking block, the through slot passes through the mounting block, and the mounting block is also provided with a locking slot staggered with the through slot, the size of the locking slot matching that of the locking block.

[0010] Furthermore, the elastic telescopic rod includes a main rod and a secondary rod arranged in the cavity of the main rod, the bottom of the secondary rod is fixedly connected with a spring, one end of the spring is fixedly connected to the bottom of the secondary rod, and the other end of the spring is fixedly connected to the bottom wall surface in the cavity of the main rod.

[0011] Furthermore, a plurality of slide grooves are provided on the wall surface of the cavity of the main rod, and a plurality of sliding blocks with sizes matching the slide grooves are provided on the auxiliary rod.

[0012] Furthermore, one end of the main rod away from the auxiliary rod is fixedly connected with a swivel, and the swivel is rotatably connected to the first mounting plate.

[0013] Furthermore, a pull rod is fixedly connected to a side of the locking block away from the auxiliary rod.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The directly buried internal pressure bellows expansion joint provided by the utility model can quickly complete the connection and disassembly of the expansion joint and the pipeline through the setting of the locking rod and the locking groove, making the installation and subsequent maintenance and replacement more convenient;

[0016] 2. The directly buried internal pressure corrugated expansion joint provided by the present utility model changes the connection method between the expansion joint and the pipeline through the setting of the locking block and the locking groove, and no longer uses the flange and screw that are vulnerable to corrosion in the soil, thus improving the service life of the expansion joint.

[0017] 3. Through the setting of the cover plate, the directly buried internal pressure corrugated expansion joint provided by the present utility model ensures that the expansion joint body will not be directly extruded by the soil during use, guaranteeing the normal operation of the expansion joint body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present utility model.

[0020] Figure 2 is an exploded view of the expansion joint and the water pipe of an embodiment of the present utility model.

[0021] Figure 3 is an exploded view of the first mounting plate and the second mounting plate of an embodiment of the present utility model.

[0022] Figure 4 is Figure 3 an enlarged view of part A in

[0023] Figure 5 is a detailed view of the locking groove and the through groove of an embodiment of the present utility model.

[0024] Figure 6 is a schematic cross-sectional view of the elastic telescopic rod of an embodiment of the present utility model.

[0025] In the figure: 1. Expansion joint body, 2. First mounting plate, 3. Fixed block, 4. Fixed rod, 5. Cover plate, 6. Elastic telescopic rod, 61. Main rod, 611. Sliding groove, 62. Sub-rod, 621. Slider, 63. Spring, 7. Swivel ring, 8. Locking block, 9. Pull rod, 10. Second mounting plate, 11. Water pipe, 12. Mounting block, 13. Channel, 14. Through groove, 15. Locking groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in 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.

[0027] See also Figures 1-6 .

[0028] The utility model discloses a direct-buried internal pressure type corrugated expansion joint, comprising an expansion joint body 1 and two first mounting plates 2 respectively fixedly connected to the two ends of the expansion joint body 1, a plurality of fixed blocks 3 are fixedly connected to the two first mounting plates 2, the plurality of fixed blocks 3 are symmetrically arranged on the two first mounting plates 2, and a fixed rod 4 is fixedly connected between the two fixed blocks 3 arranged in pairs and located on the two first mounting plates 2, a cover plate 5 is fixedly connected between the two first mounting plates 2, the cover plate 5 is sleeved on the outside of the expansion joint body 1, a plurality of elastic telescopic rods 6 are rotatably connected to the first mounting plate 2, a locking block 8 is fixedly connected to the protruding end of the elastic telescopic rod 6, a second mounting plate 10 is detachably mounted on the first mounting plate 2, a water pipe 11 is fixedly connected to the second mounting plate 10, a plurality of mounting blocks 12 are fixedly connected to the side of the second mounting plate 10 away from the water pipe 11, and a locking groove 15 for clamping the locking rod block is opened on the mounting block 12.

[0029] That is to say, a first mounting plate 2 is mounted on the expansion joint body 1, a second mounting plate 10 is mounted on the water pipe 11, a locking block 8 is mounted on the first mounting plate 2, and a locking groove 15 is provided on the second mounting plate 10. The first mounting plate 2 and the second mounting plate 10 are fixedly connected by the locking effect of the locking block 8 and the locking groove 15, that is, the expansion joint body 1 and the water pipe 11 are fixedly connected.

[0030] In addition, the second mounting plate 10 is provided with a plurality of channels 13 whose sizes match the sizes of the locking block 8 and the elastic telescopic rod 6. The channels 13 are used for the locking block 8 and the elastic telescopic rod 6 to pass through so that the locking block 8 reaches the position of the locking groove 15. Figure 4 As shown, the size of the channel 13 just matches the locking block 8 and the elastic telescopic rod 6.

[0031] Among them, the mounting block 12 is provided with a through slot 14 whose size matches the locking block 8, the through slot 14 runs through the mounting block 12, and the mounting block 12 is also provided with a locking slot 15 staggered with the through slot 14, and the size of the locking slot 15 matches the locking block 8, such as Figure 5 As shown, the through slot 14 penetrates the mounting block 12, while the locking slot 15 is not provided therethrough.

[0032] Again, the elastic telescopic rod 6 includes a main rod 61 and a secondary rod 62 disposed within the cavity of the main rod 61. A spring 63 is fixedly connected to the bottom of the secondary rod 62. One end of the spring 63 is fixedly connected to the bottom of the secondary rod 62, and the other end of the spring 63 is fixedly connected to the bottom wall surface within the cavity of the main rod 61. Multiple sliding grooves 611 are formed on the inner wall surface of the cavity of the main rod 61, and multiple sliding blocks 621 adapted to the sliding grooves 611 in size are formed on the secondary rod 62.

[0033] That is to say, although the main rod 61 and the secondary rod 62 are elastically connected, the secondary rod 62 cannot rotate relative to the main rod 61.

[0034] In addition, a rotating ring 7 is fixedly connected to the end of the main rod 61 far from the secondary rod 62. The rotating ring 7 is rotatably connected to the first mounting plate 2, enabling the main rod 61 to rotate relative to the first mounting plate 2.

[0035] Furthermore, a pull rod 9 is fixedly connected to the side of the locking block 8 far from the secondary rod 62. The pull rod 9 is used to pull the locking block 8 and the secondary rod 62 out relative to the main rod 61, facilitating the rotation of the locking block 8 from the through groove 14 to the locking groove 15.

[0036] When using the device, first rotate the multiple elastic telescopic rods 6 on the first mounting plate 2 so that the locking block 8 can be aligned with the channels 13 and the through groove 14 on the second mounting plate 10. Then, press the second mounting plate 10 against the first mounting plate 2. After that, pull out the locking block 8 and the secondary rod 62 through the pull rod 9 and rotate the locking block 8 to the position of the locking groove 15. At this time, due to the limiting effect of the sliding blocks 621 and the sliding grooves 611, the main rod 61 cannot rotate either. When multiple locking blocks 8 on the same first mounting plate 2 are all locked within the locking grooves 15, the expansion joint body 1 is also fixed to the water pipe 11. When disassembling, pull out the locking rod and rotate it to the position aligned with the through groove 14 to remove the second mounting plate 10.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model.

Claims

1. A directly buried internal pressure bellows expansion joint, characterized in that: The invention comprises an expansion joint body (1) and two first mounting plates (2) respectively fixedly connected to the two ends of the expansion joint body (1), a plurality of fixing blocks (3) being fixedly connected to the two first mounting plates (2), the plurality of fixing blocks (3) being symmetrically arranged on the two first mounting plates (2), a fixing rod (4) being fixedly connected between two fixing blocks (3) arranged in pairs on the two first mounting plates (2), a cover plate (5) being fixedly connected between the two first mounting plates (2), the cover plate (5) being sleeved on the cover plate Outside the expansion joint body (1), a plurality of elastic telescopic rods (6) are rotatably connected to the first mounting plate (2), and a locking block (8) is fixedly connected to the protruding end of the elastic telescopic rod (6). A second mounting plate (10) is detachably mounted on the first mounting plate (2), and a water pipe (11) is fixedly connected to the second mounting plate (10). A plurality of mounting blocks (12) are fixedly connected to a side of the second mounting plate (10) away from the water pipe (11), and a locking groove (15) for locking the locking block is provided on the mounting block (12).

2. The directly buried internal pressure bellows expansion joint according to claim 1, characterized in that: The second mounting plate (10) is provided with a plurality of channels (13) whose sizes are matched with the sizes of the locking block (8) and the elastic telescopic rod (6), and the channels (13) are used for the locking block (8) and the elastic telescopic rod (6) to pass through so that the locking block (8) reaches the position of the locking groove (15).

3. The directly buried internal pressure bellows expansion joint according to claim 2, characterized in that: The mounting block (12) is provided with a through slot (14) whose size matches that of the locking block (8), and the through slot (14) passes through the mounting block (12). The mounting block (12) is also provided with a locking slot (15) staggered with the through slot (14), and the size of the locking slot (15) matches that of the locking block (8).

4. The directly buried internal pressure bellows expansion joint according to claim 3, characterized in that: The elastic telescopic rod (6) comprises a main rod (61) and a secondary rod (62) arranged in a cavity of the main rod (61); a spring (63) is fixedly connected to the bottom of the secondary rod (62); one end of the spring (63) is fixedly connected to the bottom of the secondary rod (62); and the other end of the spring (63) is fixedly connected to the bottom wall surface in the cavity of the main rod (61).

5. The directly buried internal pressure bellows expansion joint according to claim 4, characterized in that: A plurality of slide grooves (611) are provided on the wall surface of the cavity of the main rod (61), and a plurality of sliding blocks (621) whose sizes match those of the slide grooves (611) are provided on the auxiliary rod (62).

6. The directly buried internal pressure bellows expansion joint according to claim 5, characterized in that: One end of the main rod (61) away from the auxiliary rod (62) is fixedly connected to a swivel (7), and the swivel (7) is rotatably connected to the first mounting plate (2).

7. The directly buried internal pressure bellows expansion joint according to claim 6, characterized in that: A pull rod (9) is fixedly connected to the side of the locking block (8) away from the auxiliary rod (62).

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