Corrosion-resistant spherical compensation joint

Abstract

The corrosion-resistant spherical compensation connector comprises a connector body, a spherical shell, a gland, a sealing ring and a sealing pipe, a second arc section of the spherical shell wraps a first arc section of the connector body, the inner wall of a third arc section of the gland is attached to the surface of the first arc section, the inner wall of the sealing ring is tightly attached to the surface of the first arc section, and the sealing pipe is connected with the second arc section of the spherical shell. The sealing pipe is arranged in the connector body and comprises third straight pipe sections, a spherical pipe and a protective wall, the two ends of the spherical pipe are fixedly connected with the third straight pipe sections respectively, and the protective wall is the pipe wall of the sealing pipe and comprises a wear-resisting layer, a corrosion-resisting layer, a high-strength layer and an anti-seepage layer. The wear-resistant layer is made of a ceramic polymer material and wraps other parts of the protective wall, the corrosion-resistant layer is made of polytetrafluoroethylene and wraps the high-strength layer and the impermeable layer, and the impermeable layer is made of a polyethylene polypropylene fiber material and wraps the high-strength layer made of netted polyethylene fibers.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline joint technical field especially relates to a kind of corrosion-resistant spherical compensation joint. BACKGROUND

[0002] Compensation joint is an important pipeline accessory, and is often used for the connection between various pipeline equipment and pipelines in various pipeline systems. Since compensation joints are applied in various pipeline systems, different modifications need to be made to the compensation joints according to different application scenarios.

[0003] Various acidic or alkaline corrosive substances are generated in the industrial production process, and these corrosive substances need to be transported through the designed pipeline system. However, many compensation joints on the market are only protected by a single corrosion-resistant coating. Although this method is effective, the single coating is often not useful when it comes to joints that need to be rotated, such as spherical compensation joints. Therefore, the compensation joints in the pipeline system need to be modified to better cope with the transportation of these corrosive substances. SUMMARY

[0004] The utility model aims at solving the shortcomings in the prior art and provides a corrosion-resistant spherical compensation joint.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of corrosion-resistant spherical compensation joint including joint body, spherical shell, gland, sealing ring and sealing pipe, the joint body includes first flange, first straight pipe section and first circular segment, the first straight pipe section two ends are respectively fixedly connected with the first flange and first circular segment, the spherical shell includes second flange, second straight pipe section, second circular segment and connecting flange, the second straight pipe section two ends are respectively fixedly connected with the second flange and second circular segment, the second circular segment two ends are fixedly connected with the second straight pipe section and connecting flange, the radius of the second circular segment is greater than the radius of first circular segment, so the second circular segment wraps first circular segment and second circular segment inner wall adheres first circular segment surface, the gland includes third flange and third circular segment, one end of the third circular segment is fixedly connected with the third flange, the radius of the third circular segment is greater than the radius of first circular segment, so the third circular segment inner wall adheres first circular segment surface, the sealing ring is arranged in the lower side of the contact end of the connecting flange and third flange and surface is closely attached to the connecting flange and third flange, the sealing ring inner wall is closely attached to the surface of the first circular segment, the sealing pipe is arranged in the joint body, the sealing pipe includes third straight pipe section, spherical pipe and protective wall, the spherical pipe two ends are respectively fixedly connected with a section of the third straight pipe section, the protective wall is the pipe wall of the sealing pipe, the protective wall includes wear-resistant layer, corrosion-resistant layer, high-strength layer and anti-permeation layer, the wear-resistant layer adopts ceramic polymer material and wraps other parts of the protective wall, so that the protective wall has good toughness and anti-fracture ability, the corrosion-resistant layer is made of polytetrafluoroethylene, the high-strength layer is made of polyethylene fiber in a net shape, which improves the anti-cracking ability of the protective wall, the anti-permeation layer is made of polyethylene propylene material, which can effectively prevent the liquid in the pipe from permeating outward, the corrosion-resistant layer wraps the high-strength layer and anti-permeation layer, and the anti-permeation layer wraps the high-strength layer.

[0006] Preferably, the third straight pipe section extends to both ends and is inserted into the pipelines connected to the compensation joint on both sides, the surface of the third straight pipe section close to the first flange and the second flange is provided with a ring of outward protruding protrusions, the protrusions are used for fixing the sealing pipe and intercepting liquid that may penetrate into the gap between the sealing pipe and the inner wall of the pipeline.

[0007] Preferably, the radius of the second circular segment and the radius of the third circular segment are the same, so that the two circular segments can form a longer circular segment under the premise of keeping the radius unchanged, which makes the sealing ring bear force evenly on both sides and is more stable, and the distance between the first circular segment and the second circular segment is equal to the distance between the first circular segment and the third circular segment, so as to facilitate the rotation of the spherical compensation joint.

[0008] Preferably, the cross-sectional area of the internal passage of the first straight pipe section and the second straight pipe section is the same and the internal passages of the two straight pipe sections are on the same horizontal line, which facilitates the third straight pipe section to closely contact the inner wall of the first straight pipe section and the second straight pipe section.

[0009] Preferably, the radius of the spherical pipe is smaller than the radius of the first circular arc section and the surface of the spherical pipe closely contacts the inner wall of the first circular arc section.

[0010] Preferably, the first flange head, the second flange head, the third flange head and the connecting flange are all of the same type, which facilitates connection.

[0011] Compared with the prior art, the utility model has the beneficial effects that: (1) the corrosion-resistant layer in the sealing pipe will not fall off due to the rotation of the spherical compensation joint through the wrapping of the wear-resistant layer, the anti-seepage layer prevents the outflow of the liquid in the pipe and improves the sealing property of the sealing pipe, the materials of the sealing pipe all have high toughness and are less affected by the rotation of the spherical compensation joint; (2) the sealing pipe cooperates with other components to form a double-sealing structure, so that the spherical compensation joint has stronger sealing property and the influence of corrosive substances on the compensation joint is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the corrosion-resistant spherical compensation joint of the utility model;

[0013] Figure 2 It is a sectional view of the corrosion-resistant spherical compensation joint of the utility model;

[0014] Figure 3 It is a structural schematic view of the partial protection wall of the corrosion-resistant spherical compensation joint of the utility model. DETAILED DESCRIPTION

[0015] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application, such as Figure 1As shown, a kind of corrosion-resistant spherical compensation joint includes joint body 1, spherical shell 2, gland 3, sealing ring 4 and sealing tube 5, the joint body 1 includes first flange head 110, first straight pipe section 120 and first circular arc section 130, the first straight pipe section 120 two ends are fixedly connected with the first flange head 110 and first circular arc section 130 respectively, the spherical shell 2 includes second flange head 210, second straight pipe section 220, second circular arc section 230 and connecting flange 240, the second straight pipe section 220 two ends are fixedly connected with the second flange head 210 and second circular arc section 230 respectively, the second circular arc section 230 two ends are fixedly connected with the second straight pipe section 220 and connecting flange 240, the radius of the second circular arc section 230 is greater than the radius of first circular arc section 130, so that the second circular arc section 230 is wrapped first circular arc section 130 and second circular arc section 230 inner wall is attached first circular arc section 130 surface;The gland package 3 includes third flange head 310 and third circular arc section 320, the third circular arc section 320 one end is fixedly connected with the third flange head 310, the third circular arc section 320 radius is greater than the radius of first circular arc section 130, so that the third circular arc section 320 inner wall is attached first circular arc section 130 surface, the sealing tube 5 is arranged in the joint body 1, the sealing tube 5 extends to both ends and is inserted into the pipeline connected with compensation joint on both sides, the surface of the sealing tube 5 close to the first flange head 110 and second flange head 210 is provided with a circle of outwardly protruding protrusions 531, the protrusions 531 are used for fixing the sealing tube 5 and intercepting liquid possibly permeated into the gap between the sealing tube 5 and the inner wall of pipeline.

[0016] As Figure 2As shown, the second arc segment 230 and the third arc segment 320 have the same radius, so that they can form a longer arc under the condition that the radius remains unchanged, which makes the sealing ring 4 more stable under uniform stress. The second arc segment 230 and the third arc segment 320 can form the same arc, so that the distance between the first arc segment 130 and the second arc segment 230 is equal to the distance between the first arc segment 130 and the third arc segment 320, thereby facilitating the rotation of the spherical compensation joint. The sealing ring 4 is arranged below the contact end of the connecting flange 240 and the third flange head 310 and tightly contacts the connecting flange 240 and the third flange head 310. The inner wall of the sealing ring 4 tightly contacts the surface of the first arc segment 130. The sealing pipe 5 includes a third straight pipe segment 510, a spherical pipe 520, and a protective wall 530. The spherical pipe 520 is fixedly connected to one end of each of the third straight pipe segments 510. The protective wall 530 is the pipe wall of the sealing pipe 5. The first straight pipe segment 120 and the second straight pipe segment 220 have the same cross-sectional area of the internal passage. The internal passages of the first straight pipe segment 120 and the second straight pipe segment 220 are on the same horizontal line, which facilitates the surface of the third straight pipe segment 510 to tightly contact the inner walls of the first straight pipe segment 120 and the second straight pipe segment 220.

[0017] As shown in Figure 3 The protective wall 530 includes a wear-resistant layer 531, a corrosion-resistant layer 532, a high-strength layer 533, and an anti-permeation layer 534. The wear-resistant layer 531 wraps other parts of the protective wall 530, so that the protective wall 530 has good toughness and anti-fracture ability. The corrosion-resistant layer 532 wraps the high-strength layer 533 and the anti-permeation layer 534. The anti-permeation layer 534 wraps the high-strength layer 533.

[0018] In use, the connecting flange 240 and the third flange head 310 are connected by a special screw. The first flange head 110 and the second flange head 210 are respectively aligned with the flanges at the pipe openings at both ends of the spherical compensation joint and are connected by special screws. The wear-resistant layer 531 made of ceramic polymer material improves the wear resistance of the protective wall 530 and prevents the wear-resistant layer 531 from being worn and falling off. The corrosion-resistant layer 532 made of polytetrafluoroethylene improves the corrosion resistance of the protective wall 530. The high-strength layer 533 made of reticular polyethylene fiber improves the anti-cracking ability of the protective wall 5. The anti-permeation layer 534 made of polyethylene propylene material can effectively prevent the liquid in the pipe from permeating outward. The double-sealing structure formed by the sealing pipe 5 and other components greatly improves the sealing performance of the spherical compensation joint and facilitates the passage of acid and alkali corrosive substances.

[0019] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A corrosion-resistant spherical expansion joint, comprising a joint body, a spherical shell, a gland, a sealing ring, and a sealing tube, characterized in that: The connector body includes a first flange head, a first straight pipe section, and a first arc segment. The first straight pipe section is fixedly connected to the first flange head and the first arc segment at both ends. The spherical shell includes a second flange head, a second straight pipe section, a second arc segment, and a connecting flange. The second straight pipe section is fixedly connected to the second flange head and the second arc segment at both ends. The second arc segment is fixedly connected to the second straight pipe section and the connecting flange at both ends. The radius of the second arc segment is larger than the radius of the first arc segment, so the second arc segment encloses the first arc segment and the inner wall of the second arc segment adheres to the surface of the first arc segment. The gland includes a third flange head and a third arc segment. One end of the third arc segment is fixedly connected to the third flange head. The radius of the third arc segment is larger than the radius of the first arc segment, so the inner wall of the third arc segment adheres to the surface of the first arc segment. The sealing ring is located below the contact end of the connecting flange and the third flange head and its surface is in close contact with the connecting flange and the third flange head. The inner wall of the sealing ring is in close contact with the surface of the first arc segment. The sealing tube is located inside the joint body. The sealing tube includes a third straight pipe section, a spherical tube, and a protective wall. A section of the third straight pipe section is fixedly connected to each end of the spherical tube. The protective wall is the pipe wall of the sealing tube. The protective wall includes a wear-resistant layer, a corrosion-resistant layer, a high-strength layer, and a seepage-proof layer. The wear-resistant layer is made of ceramicized polymer material and wraps around other parts of the protective wall. The corrosion-resistant layer is made of polytetrafluoroethylene. The high-strength layer is made of mesh-like polyethylene fiber. The seepage-proof layer is made of polyethylene polypropylene material. The corrosion-resistant layer wraps around the high-strength layer and the seepage-proof layer. The seepage-proof layer wraps around the high-strength layer.

2. The corrosion-resistant spherical expansion joint as described in claim 1, characterized in that: The second arc segment has the same radius as the third arc segment, thus allowing the two arc segments to form a longer arc while maintaining the same radius. At the same time, the distance between the first arc segment and the second arc segment is equal to the distance between the first arc segment and the third arc segment.

3. The corrosion-resistant spherical expansion joint as described in claim 1, characterized in that: The third straight pipe section extends to both ends and is inserted into the pipes connected to the compensation joints on both sides. The surface of the third straight pipe section near the first flange and the second flange is provided with a ring of outward protrusions.

4. The corrosion-resistant spherical expansion joint as described in claim 1, characterized in that: The cross-sectional area of ​​the internal channels of the first straight pipe section and the second straight pipe section is the same, and the internal channels of the two straight pipe sections are on the same horizontal line.

5. The corrosion-resistant spherical expansion joint as described in claim 1, characterized in that: The first flange head, the second flange head, the third flange head, and the connecting flange all use the same type of flange.

Images