Elastic sealing type anti-corrosion expansion joint

Abstract

The utility model discloses an elastic sealing type anti-corrosion expansion joint which comprises a first flange plate and further comprises a flexible pipe protection assembly, the flexible pipe protection assembly comprises a sleeve, an inner pipe is fixedly installed in the sleeve, a sliding groove is formed between the inner pipe and the sleeve, lubricating grease is filled in the sliding groove, a piston is installed in the sliding groove in a sliding mode, and the first flange plate is connected with the piston. And a sliding pipe is fixedly installed on one side of the piston, a sealing ring is fixedly installed at the bottom of the sliding groove, and a flexible pipe is inserted into the sliding pipe. According to the flexible pipe conveying device, the movable flexible pipe protection assembly is arranged, and the metal piston sleeve capable of sliding and stretching out and drawing back is arranged on the outer side of a traditional flexible pipe conveying device; the piston sleeve not only protects the internal flexible pipe, but also can assist in realizing the expansion and contraction effects of the conveying assembly through the expansion and contraction effect of the piston sleeve, so that the influence of rigid connection of the metal cover on expansion and contraction of the expansion joint is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an elastic sealing type anti-corrosion expansion joint. Background Art

[0002] The elastic sealing expansion joint is a special type of pipeline compensation element, which uses the elastic deformation of the bellows to absorb the axial, lateral or angular displacement caused by thermal expansion and contraction or other factors in the pipeline system. This expansion joint is characterized by its excellent sealing performance and temperature resistance, and can provide reliable compensation and sealing effects under complex working conditions. The elastic sealing expansion joint is an important part of ensuring the safe operation of the pipeline system, especially in application scenarios that require high reliability and long life.

[0003] The Chinese invention patent with application number CN215410781U discloses an elastic sealing expansion joint, which includes an expansion joint body, both ends of the expansion joint body are fixedly sleeved with flanges, the interior of the two flanges are provided with a plurality of threaded holes arranged in an annular symmetry, the expansion joint body is made of rubber material, the two ends of the expansion joint body pass through the two flanges and extend to the outside, the middle part of the expansion joint body is protruding, the outer side walls of the two flanges are fixedly connected with a plurality of fixing plates, the plurality of fixing plates are arranged in an annular symmetry, the interior of the plurality of fixing plates are provided with connection holes, and a limit support mechanism is provided between two longitudinally adjacent connection holes. The utility model can quickly support and guide the expansion joint, and is convenient for subsequent disassembly.

[0004] Expansion joints in the prior art mainly use exposed flexible tubes for elastic expansion and contraction adjustment, but the flexible tubes may corrode themselves due to the corrosiveness of the conveyed fluid during long-term use. If such corrosion cannot be repaired in time, there may be a risk of leakage of the conveyed fluid. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an elastic sealing anti-corrosion expansion joint.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An elastic sealing anti-corrosion expansion joint comprises a first flange and further comprises:

[0008] A flexible tube protection assembly includes a sleeve, an inner tube is fixedly installed inside the sleeve, a slide groove is arranged between the inner tube and the sleeve, the interior of the slide groove is filled with grease, a piston is slidably installed inside the slide groove, a slide tube is fixedly installed on one side of the piston, a sealing ring is fixedly installed on the bottom of the slide groove, and a flexible tube is plugged and installed inside the slide tube.

[0009] According to a further technical solution, the sealing ring comprises an outer sealing ring and an inner sealing ring, and the outer sealing ring and the inner sealing ring are respectively arranged on the outer side and the inner side of the sliding tube and are tightly connected.

[0010] Further technical solutions include:

[0011] The flange assembly comprises a first flange and a second flange installed on both sides of the flexible tube protection assembly, a first slot is arranged around the periphery of the first flange, a first butt joint is arranged on one side of the first flange, a first screw hole is arranged inside the first butt joint, a second slot is arranged around the periphery of the second flange, a second butt joint is arranged on one side of the second flange, and a second screw hole is arranged inside the second butt joint.

[0012] According to a further technical solution, an input pipe is butt-jointedly installed inside the first screw hole of the first butt joint pipe, and an output pipe is butt-jointedly installed inside the second screw hole of the second butt joint pipe.

[0013] Further technical solutions include:

[0014] The positioning buffer assembly comprises a slide bar slidably mounted inside the first slot and the second slot, a limit plate is mounted on the end of the slide bar, and a spring is connected and mounted between the limit plate and the flange.

[0015] According to a further technical solution, the positioning buffer assembly, the flange assembly and the flexible tube protection assembly are all configured as symmetrical structures.

[0016] According to a further technical solution, the casing, the inner tube, the sliding tube, the piston and the sealing ring are all made of corrosion-resistant materials, and an elastic knot is arranged on the surface of the flexible tube.

[0017] Compared with the prior art, the utility model provides an elastic sealing anti-corrosion expansion joint, which has the following beneficial effects:

[0018] By setting up a movable flexible tube protection component, a slidable and retractable metal piston sleeve is set on the outside of the traditional flexible tube conveying device; this piston sleeve not only protects the internal flexible tube, but also can assist in achieving the expansion and contraction effect of the conveying component through its own telescopic effect, thereby avoiding the influence of the rigid connection of the metal cover on the telescopic effect of the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an elastic sealing anti-corrosion expansion joint proposed by the utility model;

[0020] Figure 2 It is a structural schematic diagram of an exploded view of an elastic sealing anti-corrosion expansion joint proposed by the utility model;

[0021] Figure 3 This is a structural schematic diagram of a longitudinal section of an elastic sealing anti-corrosion expansion joint proposed by the utility model;

[0022] Figure 4 The utility model is a schematic structural diagram of a side view of an elastic sealing anti-corrosion expansion joint.

[0023] In the figure: 1. first flange; 2. sleeve; 3. slide groove; 4. inner tube; 5. slide tube; 6. piston; 7. sealing ring; 8. flexible tube; 9. elastic knot; 11. first butt joint; 12. first screw hole; 13. first slot; 14. slide rod; 15. limit plate; 16. spring; 17. second flange; 18. second butt joint; 19. second screw hole; 20. second slot; 701, outer sealing ring; 702, inner sealing ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Example 1: Reference Figure 1 - Figure 4 , an elastic sealing anti-corrosion expansion joint, comprising a first flange 1, the first flange 1 and the second flange 17 are components of an externally connected pipeline, and further comprising:

[0026] The flexible tube protection assembly is used to protect the internal flexible tube. The flexible tube protection assembly includes a sleeve 2. The sleeve 2 and the inner tube 4 are nested and fixedly installed. The inner tube 4 is fixedly installed inside the sleeve 2. A slide groove 3 is provided between the inner tube 4 and the sleeve 2. The slide groove 3 is the part where the slide tube 5 is slidably installed. The inside of the slide groove 3 is filled with grease, which can increase the sliding effect of the piston 6. The piston 6 is slidably installed inside the slide groove 3. The piston 6 ensures the sliding effect of the slide tube 5 while avoiding air leakage. The slide tube 5 is fixedly installed on one side of the piston 6, and a sealing ring 7 is fixedly installed at the bottom of the slide groove 3. The function of the sealing ring 7 is to prevent grease leakage and has a certain blocking and limiting effect. A flexible tube 8 is plugged and installed inside the slide tube 5.

[0027] An elastic sealing anti-corrosion expansion joint, the sealing ring 7 includes an outer sealing ring 701 and an inner sealing ring 702, which are respectively used to seal the inner side and the outer side of the sliding pipe 5. The outer sealing ring 701 and the inner sealing ring 702 are respectively arranged on the outer side and the inner side of the sliding pipe 5 and are tightly connected to prevent grease leakage.

[0028] An elastic sealing anti-corrosion expansion joint, further comprising:

[0029] Flange assembly, flange assembly is an assembly for external pipes. The flange assembly includes a first flange 1 and a second flange 17 installed on both sides of the flexible pipe protection assembly, which are used to dock the input pipe and the output pipe respectively. The first flange 1 is provided with a first slot 13 on the periphery, and the first slot 13 and the second slot 20 are used to dock and install the slide bar 14; a first butt joint pipe 11 is provided on one side of the first flange 1, and the first butt joint pipe 11 and the second butt joint pipe 18 are used to dock and install pipes respectively. A first screw hole 12 is provided inside the first butt joint pipe 11, a second slot 20 is provided around the second flange 17, a second butt joint pipe 18 is provided on one side of the second flange 17, and a second screw hole 19 is provided inside the second butt joint pipe 18.

[0030] An elastic sealing anti-corrosion expansion joint, wherein an input pipe is butt-jointedly installed inside a first screw hole 12 of a first butt joint pipe 11, and an output pipe is butt-jointedly installed inside a second screw hole 19 of a second butt joint pipe 18, wherein the input pipe and the output pipe are respectively the parts for fluid input and output.

[0031] An elastic sealing anti-corrosion expansion joint, further comprising:

[0032] The positioning buffer assembly is used to achieve the structural positioning effect of the device. The positioning buffer assembly includes a slide bar 14 slidably installed inside the first slot 13 and the second slot 20, and the slide bar 14 is a rigid support component; a limit plate 15 is installed at the end of the slide bar 14, and a spring 16 is connected and installed between the limit plate 15 and the flange, and the spring 16 plays a buffering effect through the limit plate 15.

[0033] An elastic sealing anti-corrosion expansion joint, a positioning buffer component, a flange component and a flexible pipe protection component are all arranged in a symmetrical structure, and the symmetrical structure has a certain stability.

[0034] An elastic sealing anti-corrosion expansion joint, wherein the casing 2, the inner tube 4, the sliding tube 5, the piston 6 and the sealing ring 7 are all made of anti-corrosion materials to prevent the medium from being corroded during the transmission process. An elastic joint 9 is arranged on the surface of the flexible tube 8.

[0035] In the actual creation process of the utility model, in order to avoid the following defects in the prior art: "The expansion joints of the prior art mainly use exposed flexible tubes for elastic expansion and contraction adjustment, but the flexible tubes may cause self-corrosion due to the corrosiveness of the conveyed fluid during long-term use. If such corrosion cannot be repaired in time, there may be a risk of leakage of the conveyed fluid." A flexible tube protection component is specifically proposed;

[0036] When in use, the input end and the output end of the pipeline are respectively connected to the first screw hole 12 and the second screw hole 19 of the first pair of pipes 11 and the second pair of pipes 18 to achieve the connection of the main pipeline; the fluid inside the pipeline is transported through the flexible tube 8; when the pipeline expands or contracts due to various reasons, the elastic knot 9 on the surface of the flexible tube 8 can buffer this deformation to avoid the risk of direct collapse of the pipeline, which is also the main function of the expansion joint.

[0037] However, when transporting some corrosive liquids, the material of the flexible tube 8 itself may cause some corrosion during long-term use, thereby causing leakage. Therefore, we set up a flexible tube protection component:

[0038] The flexible pipe protection component is mainly composed of: sleeve 2, slide 3, inner tube 4, slide 5, piston 6 and sealing ring 7, among which sleeve 2 and inner tube 4 are fixed together, and the slide 3 set in the middle part can allow the slide 5 to slide inside it; in order to ensure that the slide 5 can be sealed and slide slowly, we added grease inside the slide 3, and the grease can avoid the problem of large-scale leakage. We use outer sealing ring 701 and inner sealing ring 702 to seal the inner and outer sides of the slide 3 respectively. We installed piston 6 at the end of the slide 5, and the piston 6 can slide in a sealed manner inside the slide 3, thereby simulating the expansion and contraction effect of the pipeline during thermal expansion and contraction. The two sides of this protection component are respectively connected to the first flange 17 and the second flange 17 for external pipelines.

[0039] In order to ensure the stability of the device, we have opened a corresponding slot on the surface of the flange and slidably installed a slide rod 14 inside the slot; in order to make the slide rod 14 also have a certain buffering effect, we have set a limit plate 15 on the top of the slide rod 14, and the spring 16 connected and installed between the limit plate 15 and the flange can have a buffering effect on the slide rod 14.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its utility model concept, shall be covered within the protection scope of the utility model.

Claims

1. An elastic sealing anti-corrosion expansion joint, comprising a first flange (1), characterized in that: Also includes: A flexible tube protection assembly, the flexible tube protection assembly comprising a sleeve (2), an inner tube (4) fixedly mounted inside the sleeve (2), a slide groove (3) provided between the inner tube (4) and the sleeve (2), the interior of the slide groove (3) filled with grease, a piston (6) slidably mounted inside the slide groove (3), a slide tube (5) fixedly mounted on one side of the piston (6), a sealing ring (7) fixedly mounted on the bottom of the slide groove (3), and a flexible tube (8) plugged and mounted inside the slide tube (5).

2. The elastic sealing anti-corrosion expansion joint according to claim 1, characterized in that: The sealing ring (7) comprises an outer sealing ring (701) and an inner sealing ring (702), wherein the outer sealing ring (701) and the inner sealing ring (702) are respectively arranged on the outer side and the inner side of the sliding tube (5) and are hermetically connected.

3. The elastic sealing anti-corrosion expansion joint according to claim 1, characterized in that: Also includes: A flange assembly, the flange assembly comprising a first flange (1) and a second flange (17) mounted on both sides of a flexible pipe protection assembly, wherein a first slot (13) is arranged around the first flange (1), a first butt joint pipe (11) is arranged on one side of the first flange (1), a first screw hole (12) is arranged inside the first butt joint pipe (11), a second slot (20) is arranged around the second flange (17), a second butt joint pipe (18) is arranged on one side of the second flange (17), and a second screw hole (19) is arranged inside the second butt joint pipe (18).

4. The elastic sealing anti-corrosion expansion joint according to claim 3, characterized in that: An input pipe is butt-jointedly installed inside the first screw hole (12) of the first butt-jointed pipe (11), and an output pipe is butt-jointedly installed inside the second screw hole (19) of the second butt-jointed pipe (18).

5. The elastic sealing anti-corrosion expansion joint according to claim 3, characterized in that: Also includes: A positioning buffer assembly, the positioning buffer assembly comprising a slide rod (14) slidably mounted inside a first slot (13) and a second slot (20), a limit plate (15) being mounted on the end of the slide rod (14), and a spring (16) being connected and mounted between the limit plate (15) and the flange.

6. The elastic sealing anti-corrosion expansion joint according to claim 1, characterized in that: The positioning buffer component, the flange component and the flexible pipe protection component are all arranged in a symmetrical structure.

7. The elastic sealing anti-corrosion expansion joint according to claim 1, characterized in that: The sleeve (2), the inner tube (4), the sliding tube (5), the piston (6) and the sealing ring (7) are all made of corrosion-resistant materials, and an elastic knot (9) is provided on the surface of the flexible tube (8).

Images