A leak-proof sleeve expansion joint

Abstract

The utility model discloses a leak-proof sleeve expansion joint, and relates to the technical field of expansion joints. The utility model includes an outer sleeve, on which a sleeve mechanism, a connecting mechanism and a compensating mechanism are arranged; the sleeve mechanism includes an outer sleeve assembly, an inner sleeve assembly and a limiting assembly, the outer sleeve assembly includes a first slider fixedly connected to the outer sleeve, the first slider is slidably connected to a sliding rod, the outer sleeve is provided with a first flange, the outer sleeve is fixedly connected to the first flange, the sliding rod is slidably connected to a fixed block, the fixed block is fixedly connected to the first flange, and the sliding rod is threadedly connected to a first nut. The utility model sets a sleeve mechanism, utilizes the telescopic sliding between the outer sleeve and the inner sleeve, and the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve and the inner sleeve, so that the force of pipeline deformation is dispersed, thereby further reducing the probability of deformation caused by the influence of thermal expansion and contraction on the displacement of the connecting pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of expansion joints, in particular to an anti-leakage sleeve type expansion joint. Background Art

[0002] The sleeve expansion joint is a device used to absorb and compensate the axial thermal expansion displacement that occurs after the straight pipeline is laid. The sleeve expansion joint is also called a sleeve compensator or a tubular expansion joint. It is a compensation device for hot fluid pipelines and is mainly used to absorb and compensate the axial thermal expansion displacement that occurs after the straight pipeline is laid. It is suitable for hot water, steam, and grease media. The sliding movement of the sliding sleeve compensator can achieve thermal expansion compensation.

[0003] However, when the hot fluid flows downward from above, due to thermal expansion and contraction, the pipeline will absorb heat energy, the temperature change will expand, the pipeline will vibrate slightly and displace, and the pipeline will deform and crack. Some of the gases generated by the volatilization of the hot fluid will flow out from the deformed gaps, causing leakage of raw materials, resulting in increased costs and affecting the operation of subsequent equipment. Utility Model Content

[0004] The utility model aims to provide a leak-proof sleeve expansion joint, which is provided with a sleeve mechanism, utilizes the telescopic sliding between the outer sleeve and the inner sleeve, and the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve and the inner sleeve, thereby solving the problem that the pipeline absorbs heat energy and expands due to temperature changes, causing the pipeline to vibrate and displace slightly, causing the pipeline to deform and crack, resulting in leakage of raw materials.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a leak-proof sleeve expansion joint, comprising an outer sleeve, on which a sleeve mechanism, a connecting mechanism and a compensating mechanism are arranged;

[0007] Furthermore, the sleeve mechanism includes an outer sleeve assembly, an inner sleeve assembly and a limit assembly, the outer sleeve assembly includes two first sliding blocks fixedly connected to the outer wall of the outer sleeve, the inner walls of the two first sliding blocks are slidably connected with sliding rods, the bottom end of the outer sleeve is provided with two first flanges, the bottom end of the outer sleeve is fixedly connected to the top surface of the inner first flange, the top and bottom ends of the two sliding rods are slidably connected to two fixed blocks, several of the fixed blocks are fixedly connected to the outer wall of the first flange, and the top and bottom ends of the two sliding rods are threadedly connected with first nuts.

[0008] Furthermore, the inner sleeve assembly includes an inner sleeve slidably connected to the inner wall of the outer sleeve, the outer wall of the inner sleeve is fixedly connected to two second sliders, the inner walls of the two second sliders are slidably connected to the slide rod, and two second flanges are provided at the top end of the inner sleeve, the top end of the inner sleeve is fixedly connected to the bottom surface of the inner second flange, and the outer walls of the two second flanges are fixedly connected to a number of fixed blocks.

[0009] Furthermore, the limiting assembly includes two limiting blocks fixedly connected to one end of the outer sleeve and the inner sleeve that are close to each other.

[0010] Furthermore, the connection mechanism includes a sealing assembly, a bolt assembly and a connecting pipe assembly, the sealing assembly includes first sealing gaskets arranged on the surfaces of the two first flanges close to each other, and second sealing gaskets are arranged on the surfaces of the two second flanges close to each other.

[0011] Furthermore, the bolt assembly includes a plurality of threaded openings which are opened on the first flange, the second flange, the first sealing gasket and the second sealing gasket, the inner walls of the plurality of threaded openings are threadedly connected with bolts, and the bottom ends of the plurality of bolts are threadedly connected with second nuts.

[0012] Furthermore, the connecting pipe assembly includes two connecting pipes fixedly connected to the first flange and the second flange on a side away from each other, and the outer walls of the two connecting pipes are each provided with a plurality of fixing holes.

[0013] Furthermore, the compensation mechanism includes a buffer component and a blocking component, and the buffer component includes a bellows fixedly connected to a surface of the first flange and the second flange that is close to each other.

[0014] Furthermore, the blocking assembly comprises an inner sleeve fixedly connected to the inner wall of the inner second flange, and the outer wall of the inner sleeve is slidably connected to the inner wall of the corrugated pipe.

[0015] The utility model has the following beneficial effects:

[0016] 1. By setting up the sleeve mechanism, the telescopic sliding between the outer sleeve and the inner sleeve is utilized, and the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve and the inner sleeve, so that the force of pipeline deformation is dispersed, thereby further reducing the probability of deformation caused by the influence of thermal expansion and contraction on the displacement of the connecting pipeline, making it difficult for the gas generated by the hot fluid to leak from the gap.

[0017] 2. By setting up a compensation mechanism, the retractability of the bellows is utilized to further reduce the impact of thermal expansion and contraction in the tube on the device. An inner sleeve is provided to prevent the hot fluid from directly contacting the bellows, so that the residual part of the hot fluid affects the effect of the bellows on the bellows, and the inner sleeve is only connected at the feed port, so that the hot fluid cannot enter the unconnected part of the inner sleeve and contact the bellows.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a rear view overall structural schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Outer sleeve; 2. Sleeve mechanism; 3. Connecting mechanism; 4. Compensating mechanism; 21. First slider; 22. Slide rod; 23. First flange; 24. Fixing block; 25. First nut; 26. Inner sleeve; 27. Second slider; 28. Second flange; 29. ​​Limiting block; 31. First sealing gasket; 32. Second sealing gasket; 33. Threaded groove; 34. Bolt; 35. Second nut; 36. Connecting pipe; 37. Fixing hole; 41. Bellows; 42. Inner sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in 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. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 As shown, the utility model is a leak-proof sleeve expansion joint, comprising an outer sleeve 1, on which a sleeve mechanism 2, a connecting mechanism 3 and a compensating mechanism 4 are arranged;

[0029] The sleeve mechanism 2 includes an outer sleeve assembly, an inner sleeve assembly and a limit assembly. The outer sleeve assembly includes two first sliders 21 fixedly connected to the outer wall of the outer sleeve 1. The inner walls of the two first sliders 21 are slidably connected with slide rods 22. The bottom end of the outer sleeve 1 is provided with two first flanges 23. The bottom end of the outer sleeve 1 is fixedly connected to the top surface of the inner first flange 23. The top and bottom ends of the two slide rods 22 are slidably connected to two fixed blocks 24. Several fixed blocks 24 are fixedly connected to the outer wall of the first flange 23. The top and bottom ends of the two slide rods 22 are threadedly connected with first nuts 25.

[0030] Among them Figure 2 , Figure 3 and Figure 4 As shown, the inner sleeve assembly includes an inner sleeve 26 slidably connected to the inner wall of the outer sleeve 1, and two second sliders 27 are fixedly connected to the outer wall of the inner sleeve 26. The inner walls of the two second sliders 27 are slidably connected to the slide rod 22. Two second flanges 28 are provided at the top of the inner sleeve 26. The top of the inner sleeve 26 is fixedly connected to the bottom surface of the inner second flange 28, and the outer walls of the two second flanges 28 are fixedly connected to a plurality of fixed blocks 24. The limiting assembly includes two limiting blocks 29 fixedly connected to one end of the outer sleeve 1 and the inner sleeve 26 close to each other.

[0031] By setting up the sleeve mechanism, it is achieved that by utilizing the telescopic sliding between the outer sleeve 1 and the inner sleeve 26, the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve 1 and the inner sleeve 26, so that the force of pipeline deformation is dispersed, thereby further reducing the probability of deformation caused by the influence of thermal expansion and contraction on the displacement of the connecting pipeline, making it difficult for the gas generated by the hot fluid to leak from the gap.

[0032] Among them Figure 2 , Figure 4 and Figure 5As shown, the connecting mechanism 3 includes a sealing assembly, a bolt assembly and a connecting pipe assembly. The sealing assembly includes a first sealing gasket 31 which is arranged on a side of the two first flanges 23 close to each other, and a second sealing gasket 32 ​​is arranged on a side of the two second flanges 28 close to each other. The bolt assembly includes a plurality of threaded openings 33 which are opened on the first flange 23, the second flange 28, the first sealing gasket 31 and the second sealing gasket 32. The inner walls of the plurality of threaded openings 33 are threadedly connected with bolts 34, and the bottom ends of the plurality of bolts 34 are threadedly connected with second nuts 35. The connecting pipe assembly includes two connecting pipes 36 which are fixedly connected to the first flange 23 and the second flange 28 on a side away from each other, and the outer walls of the two connecting pipes 36 are opened with a plurality of fixing holes 37.

[0033] By setting up the connection mechanism, a detachable flange is realized, which facilitates separation of the device from the pipeline for transportation or maintenance, and the second sealing gasket 32 ​​and the first sealing gasket 31 strengthen the seal to prevent leakage.

[0034] Among them Figure 3 and Figure 5 As shown, the compensation mechanism includes a buffer component and a blocking component. The buffer component includes a bellows 41 fixedly connected to the first flange 23 and the second flange 28 on a surface close to each other. The blocking component includes an inner sleeve 42 fixedly connected to the inner wall of the inner second flange 28, and the outer wall of the inner sleeve 42 is slidably connected to the inner wall of the bellows 41.

[0035] By setting up the compensation mechanism, the effect of thermal expansion and contraction in the tube on the device is further reduced by utilizing the scalability of the bellows 41. The inner sleeve 42 is used to prevent the hot fluid from directly contacting the bellows 41, so that the residual part of the hot fluid on the bellows 41 affects the effect of the bellows 41, and is only connected at the feed inlet, so that the hot fluid cannot enter the unconnected part of the inner sleeve 42 and contact the bellows 41.

[0036] A specific application of this embodiment is: by setting a sleeve mechanism, when the bellows 41 is displaced, the movement of the pipeline is limited to an upward and downward telescopic action by the slide bar 22, the outer sleeve 1 and the inner sleeve 26, so that the force of thermal expansion and contraction pushes the outer sleeve 1 to telescopically slide under the restriction of the outer wall of the inner sleeve 26 through the limit block 29, the outer sleeve 1 drives the first slider 21, and the inner sleeve 26 drives the second slider 27 to slide on the slide bar 22, and the two ends of the two slide bars 22 are threadedly connected with a first nut 25 for fixing the slide bar 22 to prevent the slide bar 22 from falling, and a fixing block 24 is provided to strengthen the connection between the two first flanges 23, so that by utilizing the telescopic sliding between the outer sleeve 1 and the inner sleeve 26, the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve 1 and the inner sleeve 26, so that the force of pipeline deformation is dispersed, thereby further reducing the probability of deformation caused by the influence of thermal expansion and contraction on the displacement of the connected pipeline, making it difficult for the gas generated by the hot fluid to leak from the gap.

[0037] By setting a connecting mechanism, the first sealing gasket 31 and the second sealing gasket 32 ​​are used to seal the connection between the two first flanges 23 and the two second flanges 28 to prevent the hot fluid flowing in the internal pipeline or the generated gas from leaking out. A number of bolts 34, threaded openings 33 and second nuts 35 are set to strengthen the connection between the two flanges and facilitate disassembly, transportation and maintenance. Two connecting pipes 36 are used to connect the feed pipe and the discharge pipe. Fixing holes 37 are set to facilitate fixed connection of the pipes, thereby realizing a detachable flange, which is convenient for separating the device from the pipe for transportation or maintenance. The second sealing gasket 32 ​​and the first sealing gasket 31 strengthen the seal to prevent leakage.

[0038] By setting a compensation mechanism, since the tube is required to meet the expansion and contraction requirements, one end of the inner sleeve 42 is fixedly connected to the second flange 28 close to the feed port, and the other end of the inner sleeve 42 is sliding and not fixed in the bellows 41. The bellows 41 is used to absorb the heat energy generated by the thermal expansion and contraction in the tube and convert it into displacement for compensation, so that the influence of the thermal expansion and contraction in the tube on the device is further reduced by utilizing the expandability of the bellows 41. The inner sleeve 42 is used to prevent the hot fluid from directly contacting the bellows 41, so that the residual part of the hot fluid on the bellows 41 affects the effect of the bellows 41, and the inner sleeve 42 is only connected at the feed port, so that the hot fluid cannot enter at the unconnected part of the inner sleeve 42 and contact the bellows 41.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A leak-proof sleeve expansion joint, comprising an outer sleeve (1), characterized in that: The outer sleeve (1) is provided with a sleeve mechanism (2), a connecting mechanism (3) and a compensation mechanism (4); The sleeve mechanism (2) comprises an outer sleeve assembly, an inner sleeve assembly and a limit assembly, the outer sleeve assembly comprises two first sliders (21) fixedly connected to the outer wall of the outer sleeve (1), the inner walls of the two first sliders (21) are slidably connected to a slide rod (22), the bottom end of the outer sleeve (1) is provided with two first flanges (23), the bottom end of the outer sleeve (1) is fixedly connected to the top surface of the inner first flange (23), the top and bottom ends of the two slide rods (22) are Two fixed blocks (24) are slidably connected, and a plurality of the fixed blocks (24) are fixedly connected to the outer wall of the first flange (23). The top and bottom ends of the two sliding rods (22) are threadedly connected with first nuts (25). The inner sleeve assembly includes an inner sleeve (26) slidably connected to the inner wall of the outer sleeve (1). The outer wall of the inner sleeve (26) is fixedly connected to two second sliding blocks (27), and the inner walls of the two second sliding blocks (27) are slidably connected to the sliding rod (22).

2. The anti-leakage sleeve expansion joint according to claim 1, characterized in that: Two second flanges (28) are arranged at the top end of the inner sleeve (26), the top end of the inner sleeve (26) is fixedly connected to the bottom surface of the inner second flange (28), and the outer walls of the two second flanges (28) are fixedly connected to a plurality of fixing blocks (24).

3. The anti-leakage sleeve expansion joint according to claim 2, characterized in that: The limiting assembly comprises two limiting blocks (29) fixedly connected to one end of the outer sleeve (1) and the inner sleeve (26) close to each other.

4. The anti-leakage sleeve expansion joint according to claim 3, characterized in that: The connection mechanism (3) comprises a sealing assembly, a bolt assembly and a connection pipe assembly. The sealing assembly comprises a first sealing gasket (31) arranged on a surface of two first flanges (23) close to each other, and a second sealing gasket (32) is arranged on a surface of two second flanges (28) close to each other.

5. The anti-leakage sleeve expansion joint according to claim 4, characterized in that: The bolt assembly comprises a plurality of threaded openings (33) each opened on the first flange (23), the second flange (28), the first sealing gasket (31) and the second sealing gasket (32); the inner walls of the plurality of threaded openings (33) are threadedly connected with bolts (34); and the bottom ends of the plurality of bolts (34) are threadedly connected with second nuts (35).

6. The anti-leakage sleeve expansion joint according to claim 5, characterized in that: The connecting pipe assembly comprises two connecting pipes (36) fixedly connected to the first flange (23) and the second flange (28) on a side away from each other, and the outer walls of the two connecting pipes (36) are each provided with a plurality of fixing holes (37).

7. The anti-leakage sleeve expansion joint according to claim 6, characterized in that: The compensation mechanism comprises a buffer component and a blocking component. The buffer component comprises a bellows (41) fixedly connected to a first flange (23) and a second flange (28) on a surface close to each other.

8. The anti-leakage sleeve expansion joint according to claim 7, characterized in that: The blocking assembly comprises an inner sleeve (42) fixedly connected to the inner wall of the inner second flange (28), and the outer wall of the inner sleeve (42) is slidably connected to the inner wall of the bellows (41).

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