Steel lined rubber expansion joint

Abstract

The utility model relates to pipeline valve technical field, especially a kind of steel lining rubber expansion joint, including inner tube sleeve and outer tube sleeve;Sealing boss is placed in inner and outer sleeve pipe, filler placed therein is compacted by pressing sleeve, and including a special butterfly spring;Butterfly spring is placed in boss;Filler is placed on disc spring and is compacted by inner sleeve, when filler in expansion joint due to long-term use leads to sealing property weakening, disc spring fills the gap caused by filler abrasion due to elastic deformation, compacts filler in middle cavity, improves overall sealing property, can effectively satisfy the internal pressure compensation when rubber inner sleeve expands, when rubber inner sleeve long-term abrasion failure, internal sealing performance can be guaranteed simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of pipeline valve technology, and in particular to a steel-lined rubber expansion joint. Background Technology

[0002] In mining operations, pipelines may contain slurry, slag slurry, and other media containing impurities such as stones and mineral powder. Ordinary expansion joints cannot be used in this environment. Furthermore, due to pressure fluctuations in the medium within mining pipelines, traditional expansion joints are more prone to leakage. Therefore, to meet the requirements of slurry conditions and ensure the overall sealing performance of the expansion joint during operation, rubber-lined expansion joints with better sealing and wear resistance are needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model discloses a steel-lined rubber expansion joint.

[0004] The specific technical solution is as follows: The steel-lined rubber expansion joint includes an outer sleeve, a gland, and an inner sleeve. The inner sleeve is coaxially installed inside the outer sleeve to adjust the overall length of the structure. A circumferential boss is provided inside the outer sleeve near the upper end. A disc spring is installed between the boss and the gland. A filler is added to the upper part of the disc spring. The upper end of the filler is pressed by the gland. The gland is fitted inside the upper end of the outer sleeve and connected by a flange.

[0005] The lower end of the outer sleeve is flange A, the upper end is flange B, the gland has flange C, and the inner sleeve has flange D. Through holes are provided on flanges A, B, C, and D. The through holes of flanges B and C are connected by locking bolts. Flanges A and D are respectively connected to the flanges of the pipelines to be connected.

[0006] The disc spring comprises four sets, with each pair of sets placed symmetrically on the same axis with their large end diameters facing each other. The lower small end diameter abuts against the boss, and when the disc spring recovers its deformation, the upper small end diameter abuts against the packing.

[0007] An integrally formed rubber inner sleeve is provided between the outer sleeve and the inner sleeve, forming an effective hollow seal between the outer sleeve, the inner sleeve and the rubber inner sleeve, with steel wire lining the rubber inner sleeve.

[0008] The rubber inner sleeve inside the outer tube has a corrugated structure. Compared with the prior art, the present invention has the following beneficial technical effects: The steel-lined rubber expansion joint proposed in this utility model is used for length compensation. By being installed on the pipeline, it can solve the problem of thermal expansion and contraction of pipeline length caused by pipeline installation errors or temperature differences after pipeline installation, so as to meet the overall pipeline stability on site and achieve automatic length compensation.

[0009] The steel-lined rubber expansion joint proposed in this utility model consists of an inner sleeve, an outer sleeve, a rubber inner sleeve, a gland, packing, and a disc spring. The inner and outer sleeves cooperate with each other to automatically adjust the pipeline length. The function of this expansion joint is to compensate for length changes caused by thermal expansion and contraction of the pipeline due to temperature variations in special working conditions such as pipelines containing slurry or slag. It also prevents leakage of the medium and related particulate impurities, resists erosion, and prevents leakage. The product is suitable for the aforementioned working conditions.

[0010] This utility model relates to a steel-lined rubber expansion joint, which incorporates specially designed disc springs. These, along with internal bosses and filler, enhance the sealing performance of the inner and outer sleeves, solving the problem of hollow sealing during rubber inner sleeve expansion and contraction. During overall expansion and contraction compensation, it effectively maintains stable internal pressure. Four disc springs are arranged symmetrically in pairs, providing bidirectional adjustment during compression. The even distribution of elastic restoring force ensures thorough filling of the filler, further improving sealing.

[0011] This utility model features an inner and outer sleeve with an integrated, molded rubber inner sleeve. An effective hollow seal is formed between the outer sleeve, inner sleeve, and rubber inner sleeve, ensuring stable internal pressure during overall expansion and contraction. The rubber inner sleeve is lined with steel wire, effectively meeting strength requirements and providing wear and erosion resistance while compensating for pipeline length, ensuring stable pipeline operation even under harsh conditions. The rubber inner sleeve has a corrugated structure, providing expansion and contraction capabilities.

[0012] This utility model is used for length compensation of natural temperature difference changes in indoor and outdoor pipelines in industries such as mining, metallurgy, power plants, coal, and chemicals. It can also be used for error compensation in pipeline installation. It has a simple structure, is easy to maintain, and only the inner sleeve needs to be replaced during maintenance. It also has high durability and economy. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the expansion joint of this utility model; Figure 2 This is a schematic diagram showing the installation position of the disc spring of this utility model; In the diagram, 1 is the outer sleeve; 11 is flange A; 12 is flange B; 13 is the through hole; 14 is the boss; 2 is the rubber inner sleeve; 21 is the corrugated structure; 3 is the disc spring; 4 is the packing; 5 is the gland; 51 is flange C; 6 is the inner sleeve; 61 is flange D; and 7 is the locking screw. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the accompanying drawings.

[0015] Figure 1 This is a cross-sectional view of the expansion joint of this utility model. Figure 2The figure shows a schematic diagram of the installation position of the disc spring of this utility model: This utility model of a steel-lined rubber expansion joint includes an outer sleeve 1, a gland 5, and an inner sleeve 6. The inner sleeve 6 is coaxially installed inside the outer sleeve 1 to adjust the length of the overall structure. A circumferential boss 14 is provided inside the outer sleeve 1 near the upper end. A disc spring 3 is installed between the boss 1 and the gland 5. A filler 4 is added to the upper part of the disc spring 3. The upper end of the filler 4 is pressed by the gland 5. The gland 5 is fitted inside the upper end of the outer sleeve 1 and connected by a flange. The lower end of the outer sleeve 1 is flange A 11, and the upper end is flange B 12. The gland 5 has flange C 61, and the inner sleeve 6 has flange D 62. Through holes are opened on flanges A 11, B 12, C 61, and D 62. The through holes of flanges B 12 and C 61 are connected by locking screws 7. Flanges A 11 and D 62 are respectively connected to the pipes to be connected on the pipeline.

[0016] The disc spring 3 includes four sets, with each pair of sets placed symmetrically on the same axis with their large end diameter surfaces facing each other. The lower small end diameter surface abuts against the boss 14. When the disc spring 3 recovers its deformation, the upper small end diameter surface abuts against the packing 4.

[0017] An integrally formed rubber inner sleeve 2 with a corrugated structure is provided between the outer sleeve 1 and the inner sleeve 6, forming an effective hollow seal between the outer sleeve 1, the inner sleeve 6 and the rubber inner sleeve 2, with steel wire lining the inner sleeve 2.

[0018] During use, the steel-lined expansion joint adopts a unique disc spring design. The return property of the disc spring compensates for the packing loss during the overall operation, forming an effective hollow seal. During the overall expansion and contraction compensation process, it can effectively ensure the stability of internal pressure and effectively solve the problem of sealing loss caused by packing wear during use. Furthermore, because there is an integrally formed corrugated rubber inner sleeve between the outer sleeve and the inner sleeve, it has the characteristics of wear resistance and erosion resistance and has overall fluid sealing performance. The inner sleeve is placed inside the outer sleeve, and the whole unit can automatically perform length compensation when connected to the pipeline. When pipelines are affected by temperature, their overall length will change slightly. At this time, the flanges at both ends of this rubber-lined expansion joint are connected to the pipeline. Since the outer sleeve and inner sleeve can expand and contract, the rubber inner sleeve will also expand and contract, thus compensating for the length change. During pipeline installation, this rubber-lined expansion joint can also compensate for pipeline installation problems caused by installation errors. The one-piece corrugated rubber inner sleeve can also effectively reduce pipeline wear caused by slurry, slag, and other impurities during pipeline operation, increasing the wear resistance and durability of this product. It can also be used for pipeline length compensation in rubber-lined pipelines and related wear-resistant environments, and has high durability.

Claims

1. A steel-lined rubber expansion joint, characterized in that: It includes an outer sleeve (1), a gland (5) and an inner sleeve (6); the inner sleeve (6) is coaxially installed inside the outer sleeve (1) to adjust the length of the overall structure; a circumferential boss (14) is provided inside the outer sleeve (1) near the upper end; a disc spring (3) is installed between the boss (14) and the gland (5), and a filler (4) is added to the upper part of the disc spring (3). The upper end of the filler (4) is pressed by the gland (5), and the gland (5) is fitted inside the upper end of the outer sleeve (1) and connected by a flange.

2. The steel-lined rubber expansion joint according to claim 1, characterized in that: The lower end of the outer sleeve (1) is flange A (11), the upper end is flange B (12), the gland (5) has flange C (51), and the inner sleeve (6) has flange D (61). Through holes (13) are opened on flange A (11), flange B (12), flange C (51) and flange D (61). The through holes (13) of flange B (12) and flange C (51) are connected by locking screws (7). Flange A (11) and flange D (61) are respectively connected to the flanges of the pipelines to be connected on the pipeline.

3. The steel-lined rubber expansion joint according to claim 1, characterized in that: The disc spring (3) includes four sets, with each pair of sets placed symmetrically on the same axis with their large end diameter surfaces facing each other. The lower small end diameter surface abuts against the boss (14), and when the disc spring (3) recovers its deformation, the upper small end diameter surface abuts against the packing (4).

4. The steel-lined rubber expansion joint according to claim 1, characterized in that: An integrally formed rubber inner sleeve (2) is provided between the outer sleeve (1) and the inner sleeve (6), forming an effective hollow seal between the outer sleeve (1), the inner sleeve (6) and the rubber inner sleeve (2), with steel wire lining the rubber inner sleeve (2).

5. The steel-lined rubber expansion joint according to claim 1, characterized in that: The rubber inner sleeve (2) inside the outer sleeve (1) has a corrugated structure (21).

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