Telescopic joint device and pipeline system

Abstract

The utility model provides an expansion joint device and a pipeline system. The expansion joint device comprises a first sleeve assembly, a second sleeve assembly, a sealing assembly, a plurality of pull rod assemblies and a telescopic conductor assembly. The first sleeve assembly comprises a first sleeve and a first lug plate protruding in the radial direction of the first sleeve. The second sleeve assembly comprises a second sleeve and a second lug plate protruding in the radial direction of the second sleeve, and the second sleeve and the first sleeve are coaxially and slidably connected in a sleeving mode; the sealing assembly is arranged on the side wall, facing the second sleeve, of the first sleeve, and / or the sealing assembly is arranged on the side wall, facing the first sleeve, of the second sleeve, and the first sleeve and the second sleeve are connected in a sleeved mode through the sealing assembly to form a sliding sealing pipeline; one end of the pull rod assembly is in sliding fit with the first lug plate, and the other end is in sliding fit with the second lug plate; the conductor assembly is arranged in the sliding sealing pipeline. According to the scheme, the mechanical hidden danger of the sliding sealing pipeline is reduced, the reliability of the expansion joint device is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power transmission line operation and maintenance, and in particular to an expansion joint device and a pipeline system. Background Art

[0002] GIS (Gas Insulated Switchgear) and GIL (Gas Insulated Metal Enclosed Transmission Line) are important components of transmission lines, with large transmission capacity and high operating reliability, and are widely used in power systems. Thermal expansion and contraction of GIS and GIL busbars will cause bending and expansion of GIS and GIL busbars and leakage of insulating gas inside GIS and GIL busbars, which will cause the substation to fail to operate reliably and may eventually cause safety accidents. In order to avoid this situation, expansion joints are usually connected between adjacent busbar barrels to compensate for the deformation of GIS and GIL busbars due to thermal expansion and contraction.

[0003] In the existing expansion joint device, a stainless steel bellows is usually arranged between two fixed plates, and then the two fixed plates are respectively connected to the two adjacent busbar barrels, and the deformation caused by thermal expansion and contraction is compensated by the expansion and contraction of the stainless steel bellows. However, since there are many stress concentration points in the stainless steel bellows, it is very easy to produce metal fatigue and fracture during long-term operation due to repeated expansion and contraction, resulting in insulation gas leakage and expansion joint device failure, which seriously affects the reliability and safety of power transmission. Utility Model Content

[0004] The present invention provides an expansion joint device and a pipeline system, which can solve the problem of failure of the expansion joint device caused by long-term working degradation of a stainless steel bellows in the existing expansion joint device, thereby ensuring the reliability and safety of power transmission.

[0005] To solve the above technical problems, the present disclosure provides a telescopic joint device and a pipeline system, the telescopic joint device comprising: a first sleeve assembly, the first sleeve assembly comprising a first sleeve and a first ear plate protruding radially along the first sleeve; a second sleeve assembly, the second sleeve assembly comprising a second sleeve and a second ear plate protruding radially along the second sleeve, the second sleeve being coaxially slidably sleeved with the first sleeve; a sealing assembly, the sealing assembly being arranged on the side wall of the first sleeve facing the second sleeve, and / or the sealing assembly being arranged on the side wall of the second sleeve facing the first sleeve, the first sleeve and the second sleeve being sleeved through the sealing assembly to form a sliding sealing pipe; a plurality of tie rod assemblies, the tie rod assembly extending axially along the sliding sealing pipe, one end of the tie rod assembly slidingly cooperating with the first ear plate, and the other end slidingly cooperating with the second ear plate; a telescopic conductor assembly, the conductor assembly being arranged along the extension direction of the sliding sealing pipe, one end of the conductor assembly being mounted on the first sleeve assembly, and the other end being mounted on the second sleeve assembly in the sliding sealing pipe.

[0006] On the one hand, the telescopic joint device provided by the present disclosure forms a sliding sealing pipe for accommodating a conductor assembly by slidingly sleeved the first sleeve of the first sleeve assembly and the second sleeve of the second sleeve assembly, and the sealing assembly seals the connection between the first sleeve and the second sleeve, thereby eliminating the use of a stainless steel bellows in the prior art and improving the operating reliability and service life of the sliding sealing pipe; by arranging the pull rod assembly in a circumferentially dispersed manner between the first sleeve assembly and the second sleeve assembly, and making the first ear plate of the first sleeve assembly and the second ear plate of the second sleeve assembly respectively slide with the pull rod assembly, the sliding fit between the first sleeve and the second sleeve can be limited to avoid the first sleeve and the second sleeve from rotating relative to each other while sliding relative to each other, thereby affecting the sealing performance of the sealing assembly; by arranging a retractable conductor assembly in the sliding sealing pipe, the conductor assembly can generate strain according to the expansion and contraction of the sliding sealing pipe, and the expansion and contraction of the sliding sealing pipe can ensure the conduction of the circuit. Therefore, the scheme of the present disclosure can avoid forming a sealing pipe through a stainless steel bellows that is easy to deteriorate, reduce the mechanical hidden dangers of metal fatigue and fracture of the sliding sealing pipe, and improve the reliability and service life of the telescopic joint device.

[0007] Furthermore, the number of the tie rod assemblies is at least two, wherein at least two of the tie rod assemblies are evenly distributed along the circumferential direction relative to the central axis of the sliding sealing pipe.

[0008] Further, the pull rod assembly includes a pull rod body, at least one elastic member, a plurality of first stops and a plurality of second stops, wherein the first stop is movable along the axial direction of the pull rod body; one end of the pull rod body is slidable through the first ear plate, and the other end is slidable through the second ear plate; wherein the elastic member, the first stop and the second stop are respectively provided at the joint end where the pull rod body is engaged with each of the first ear plate and the second ear plate, and the corresponding first stop and second stop are respectively arranged on both sides of each of the first ear plate and the second ear plate; wherein, on the side close to the first ear plate, the elastic member is arranged along the axial direction of the pull rod body between the second stop and the first ear plate and / or between the first ear plate and the first stop; and / or, on the side close to the second ear plate, the elastic member is arranged along the axial direction of the pull rod body between the first stop and the second ear plate and / or between the second ear plate and the second stop.

[0009] Furthermore, the elastic member is a disc spring, and the pull rod body passes through the elastic member; the first stop member is a nut, and along the axial direction of the pull rod body, the first stop member is threadedly matched with the pull rod body.

[0010] Furthermore, the sealing assembly includes at least one sealing ring and at least two guide sleeves, wherein the sealing ring is located between the two guide sleeves in the axial direction of the pull rod assembly, and the guide sleeve is used to guide the sliding sleeve connection between the first sleeve and the second sleeve; at least one first accommodating groove for accommodating the sealing ring and at least two second accommodating grooves for accommodating the guide sleeves are correspondingly provided on the first sleeve and / or the second sleeve.

[0011] Further, the diameter of the first sleeve is larger than the diameter of the second sleeve, and two first accommodating grooves and two second accommodating grooves are provided on the inner wall of the first sleeve, wherein the two first accommodating grooves are located between the two second accommodating grooves; a protrusion extending radially outward is formed on the outer wall of the first sleeve, and the protrusion spans the two first accommodating grooves and the two second accommodating grooves along the axial direction of the first sleeve.

[0012] Further, the first ear plate is arranged at one end of the first sleeve facing away from the second sleeve, and the first sleeve assembly also includes a first insulating basin, which is detachably connected to the first ear plate; the second ear plate is arranged at one end of the second sleeve facing away from the first sleeve, and the second sleeve assembly also includes a second insulating basin, which is detachably connected to the second ear plate; one end of the conductor assembly is installed on the first insulating basin, and the other end is installed on the second insulating basin.

[0013] Furthermore, the conductor assembly includes a conductor body and a contact. Along the axial direction of the sliding sealing pipe, the conductor body and the contact are detachably slidably connected. The contact is installed at one end of the sliding sealing pipe, and the conductor body extends to the other end of the sliding sealing pipe.

[0014] Furthermore, the first sleeve and the second sleeve are both made of non-ferromagnetic materials.

[0015] According to another aspect of the present disclosure, a pipeline system is provided, comprising a first pipeline segment, a second pipeline segment and the above-mentioned telescopic joint device, wherein along the axial direction of the sliding sealing pipe, the first pipeline segment is connected to one end of the telescopic joint device, and the second pipeline segment is connected to the other end of the telescopic joint device.

[0016] Another aspect of the present disclosure provides a pipeline system that adopts the above-mentioned expansion joint device. Since the expansion joint device has the advantages of small mechanical hidden dangers, high reliability and long service life, the pipeline system also has good quality in corresponding aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0018] Figure 1 is a schematic structural diagram of an expansion joint device according to the present disclosure;

[0019] Figure 2 is a schematic diagram of an embodiment of a telescopic joint device according to the present disclosure;

[0020] Figure 3 When the pipeline system expands due to heat Figure 2 A schematic diagram of an embodiment of the telescopic joint device of the present disclosure is shown;

[0021] Figure 4 When the pipeline system contracts due to cold Figure 2 A schematic diagram of an embodiment of the telescopic joint device of the present disclosure is shown;

[0022] Figure 5 is a structural schematic diagram of the first sleeve of the telescopic joint device according to the present disclosure being compressed toward the second sleeve;

[0023] Figure 6 It is a schematic diagram of the structure after the conductor body of the expansion joint device according to the present disclosure is removed from the contact.

[0024] Description of Figure Numbers:

[0025] 1. First sleeve assembly; 11. First sleeve; 12. First ear plate;

[0026] 13. The first insulating basin;

[0027] 2. Second sleeve assembly; 21. Second sleeve; 22. Second ear plate;

[0028] 23. Second insulating basin;

[0029] 3. Sealing assembly; 31. Sealing ring; 32. Guide sleeve;

[0030] 4. Tie rod assembly; 41. Tie rod body; 42. Elastic member;

[0031] 43. A first stopper; 44. A second stopper;

[0032] 5. Conductor assembly; 51. Conductor body; 52. Contact. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0035] Figure 1 A schematic structural diagram of an expansion joint device according to the present disclosure; Figure 2 is a schematic diagram of an embodiment of the telescopic joint device according to the present disclosure, showing a specific embodiment of the telescopic joint device of the present disclosure in a practical application process; Figure 3 and Figure 4 Shows Figure 2 The embodiment shown provides a maximum distance for compensating for thermal expansion and thermal contraction of the piping system.

[0036] See also Figure 1According to a telescopic joint device and pipeline system disclosed in the present invention, the telescopic joint device provided in the present invention includes: a first sleeve assembly 1, a second sleeve assembly 2, a sealing assembly 3, a plurality of tie rod assemblies 4 and a conductor assembly 5. The first sleeve assembly 1 includes a first sleeve 11 and a first ear plate 12 protruding radially along the first sleeve 11. The second sleeve assembly 2 includes a second sleeve 21 and a second ear plate 22 protruding radially along the second sleeve 21, and the second sleeve 21 is coaxially slidably sleeved with the first sleeve 11; wherein the first sleeve assembly 1 and the second sleeve assembly 2 are suitable for being connected between two adjacent pipeline sections of the pipeline system; optionally, the first ear plate 12 is arranged at one end of the first sleeve 11 facing away from the second sleeve 21, and similarly, the second ear plate 22 is arranged at one end of the second sleeve 21 facing away from the first sleeve 11, so as to reserve space for relative sliding between the first sleeve 11 and the second sleeve 21; preferably, the first ear plate 12 and the second ear plate 22 can be continuous annular structures. The sealing assembly 3 is arranged on the side wall of the first sleeve 11 facing the second sleeve 21, and / or the sealing assembly 3 is arranged on the side wall of the second sleeve 21 facing the first sleeve 11, and the first sleeve 11 and the second sleeve 21 are sleeved through the sealing assembly 3 to form a sliding sealing pipe. The pull rod assembly 4 extends along the axial direction of the sliding sealing pipe, one end of the pull rod assembly 4 is slidably matched with the first ear plate 12, and the other end is slidably matched with the second ear plate 22; it should be noted that the number of the pull rod assemblies 4 can be one or more. A retractable conductor assembly 5 is arranged in the sliding sealing pipe along the extension direction of the sliding sealing pipe; one end of the conductor assembly 5 is installed on the first sleeve assembly 1, and the other end is installed on the second sleeve assembly 2; the conductor assembly 5 can compensate for the corresponding expansion and contraction when the first sleeve 11 and the second sleeve 21 slide relative to each other.

[0037] The telescopic joint device disclosed in the present invention forms a sliding sealing conduit for accommodating the conductor assembly 5 by slidingly sleeved together the first sleeve 11 of the first sleeve assembly 1 and the second sleeve 21 of the second sleeve assembly 2, and sealing the connection between the first sleeve 11 and the second sleeve 21 by the sealing assembly 3, thereby eliminating the use of a stainless steel bellows in the prior art and improving the operating reliability and service life of the sliding sealing conduit; by arranging the pull rod assemblies 4 in a circumferentially dispersed manner between the first sleeve assembly 1 and the second sleeve assembly 2, and making the first ear plate 12 of the first sleeve assembly 1 and the second ear plate 22 of the second sleeve assembly 2 slide with the pull rod assemblies 4 respectively, the sliding fit between the first sleeve 11 and the second sleeve 21 can be limited to avoid relative rotation of the first sleeve 11 and the second sleeve 21 while sliding relative to each other, thereby affecting the sealing performance of the sealing assembly 3; by arranging a telescopic conductor assembly 5 in the sliding sealing conduit, the conductor assembly 5 can generate strain according to the expansion and contraction of the sliding sealing conduit, accompanying the expansion and contraction of the sliding sealing conduit to ensure the conduction of the circuit. Therefore, the solution disclosed in the present invention can avoid using easily deteriorated stainless steel bellows to form a sealed pipe, reduce the mechanical risks of metal fatigue and fracture of the sliding sealed pipe, and improve the reliability and service life of the expansion joint device.

[0038] In some specific embodiments, the number of the tie rod assemblies 4 is at least two, wherein at least two tie rod assemblies 4 are evenly arranged in the circumferential direction relative to the central axis of the sliding sealing pipe. By providing multiple tie rod assemblies 4, and at least two tie rod assemblies 4 are symmetrical, the tangential force on the connection between the first ear plate 12 and the second ear plate 22 and the tie rod assemblies 4 can be balanced, so that the relative sliding between the first sleeve 11 and the second sleeve 21 is smoother. Preferably, the number of the tie rod assemblies 4 is two, and the above-mentioned two tie rod assemblies 4 are symmetrically arranged relative to the central axis of the sliding sealing pipe.

[0039] In some further embodiments, the rod assembly 4 includes a rod body 41, at least one elastic member 42, a plurality of first stop members 43 and a plurality of second stop members 44, wherein the first stop member 43 is movable along the axial direction of the rod body 41; one end of the rod body 41 is slidable through the first ear plate 12, and the other end of the rod body 41 is slidable through the second ear plate 22; wherein the elastic member 42, the first stop member 43 and the second stop member 44 are respectively provided at the joint ends where the rod body 41 is joined with each of the first ear plate 12 and the second ear plate 22, A corresponding first stopper 43 and a second stopper 44 are arranged on both sides of each of the first ear plate 12 and the second ear plate 22; wherein, on the side close to the first ear plate 12, the elastic member 42 is arranged between the second stopper 44 and the first ear plate 12 and / or between the first ear plate 12 and the first stopper 43 along the axial direction of the pull rod body 41; and / or, on the side close to the second ear plate 22, the elastic member 42 is arranged between the first stopper 43 and the second ear plate 22 and / or between the second ear plate 22 and the second stopper 44 along the axial direction of the pull rod body 41. The first stopper 43 and the second stopper 44 can limit the first ear plate 12, the second ear plate 22 and the elastic member 42, so that the first sleeve 11 and the second sleeve 21 can slide in a limited space, thereby limiting the axial direction of the first sleeve assembly 1 and the second sleeve assembly 2; wherein, the elastic member 42 can buffer the sliding of the first sleeve 11 and the second sleeve 21 in at least one direction. In more detail, the first stopper 43 is disposed between the first ear plate 12 and the second ear plate 22, and the second stopper 44 is disposed on the side of the first ear plate 12 facing away from the second ear plate 22 and the side of the second ear plate 22 facing away from the first ear plate 12. Figure 2 In the illustrated embodiment, a first stopper 43 is provided on a side of the first ear plate 12 facing the second ear plate 22, and an elastic member 42 and a second stopper 44 are sequentially provided on a side of the first ear plate 12 facing away from the second ear plate 22; a first stopper 43 is provided on a side of the second ear plate 22 facing the first ear plate 12, and an elastic member 42 and a second stopper 44 are sequentially provided on a side of the second ear plate 22 facing away from the first ear plate 12; or, in another embodiment, a first stopper 43 is provided on a side of the first ear plate 12 facing away from the second ear plate 22, and an elastic member 42 and a second stopper 44 are sequentially provided on a side of the first ear plate 12 facing away from the second ear plate 22; a first stopper 43 is provided on a side of the second ear plate 22 facing away from the first ear plate 12, and an elastic member 42 and a second stopper 44 are sequentially provided on a side of the second ear plate 22 facing the first ear plate 12.

[0040] For example, Figure 2In the actual application of the embodiment shown, the distance between the first ear plate 12 and the second ear plate 22 is L, and a distance L1 can be reserved between the first stopper 43 and the first ear plate 12 and the second ear plate 22, respectively, to provide space for the relative sliding of the first sleeve assembly 1 and the second sleeve assembly 2. Figure 3 As shown, the first sleeve assembly 1 and the second sleeve assembly 2 are both under pressure, and the maximum length of the telescopic joint device that can be retracted is 2L1, that is, the minimum distance between the first ear plate 12 and the second ear plate 22 is L-2L1; when the temperature decreases, as shown in FIG. Figure 4 As shown, the first sleeve assembly 1 and the second sleeve assembly 2 are both subjected to tension, and the maximum length that the telescopic joint device can extend is 2L2, that is, the maximum distance between the first ear plate 12 and the second ear plate 22 is L+2L2. The values ​​of L1 and L2 can be equal or different. Optionally, elastic members 42 can also be respectively provided between the first stopper 43 and the first ear plate 12 and between the first stopper 43 and the second ear plate 22.

[0041] Figure 5 is a schematic structural diagram of the first sleeve 11 of the telescopic joint device according to the present disclosure being compressed toward the second sleeve 21, and Figure 6 It is a schematic structural diagram of the conductor body 51 of the expansion joint device according to the present disclosure after being removed from the contact 52, illustrating the disassembly process of the expansion joint device.

[0042] In such Figure 1 In the illustrated embodiment, the elastic member 42 is a disc spring, and the pull rod body 41 passes through the elastic member 42; the first stopper 43 is a nut, and the first stopper 43 is threadedly engaged with the pull rod body 41 along the axial direction of the pull rod body 41. By setting the first stopper 43 to be threadedly engaged with the pull rod body 41, during the disassembly process of the device, the first stopper 43 can be moved in the opposite direction to the stopping direction of the first stopper 43, thereby leaving a larger contraction margin for the first sleeve 11 or the second sleeve 21, so that the first sleeve 11 or the second sleeve 21 can slide toward each other, thereby greatly shortening the length of the sliding sealing pipeline, making the disassembly process of the telescopic joint device simpler and faster, so as to facilitate the operation and maintenance personnel to inspect the pipeline. Optionally, the second stopper 44 can also be a nut, especially a nut of the same specification as the first stopper 43.

[0043] More specifically, see Figure 1The sealing assembly 3 includes at least one sealing ring 31 and at least two guide sleeves 32. The sealing ring 31 is located between two guide sleeves 32 in the axial direction of the pull rod assembly 4. The guide sleeve 32 is used to guide the sliding sleeve connection between the first sleeve 11 and the second sleeve 21. Optionally, multiple sealing rings 31 can also be provided; at least one first receiving groove for receiving the sealing ring 31 and at least two second receiving grooves for receiving the guide sleeve 32 are correspondingly provided on the first sleeve 11 and / or the second sleeve 21. The guide sleeve 32 is provided to ensure the concentricity between the first sleeve 11 and the second sleeve 21, so as to ensure the sealing effect of the sealing ring 31; by directly providing the first receiving groove and the second receiving groove on the first sleeve 11 and / or the second sleeve 21, the integration of the sliding sealing pipeline can be improved, and a protective structure for the sealing ring 31 and the guide sleeve 32 can be formed at the same time.

[0044] Continue to see Figure 1 The diameter of the first sleeve 11 is larger than the diameter of the second sleeve 21. Two first receiving grooves and two second receiving grooves are formed on the inner wall of the first sleeve 11, wherein the two first receiving grooves are located between the two second receiving grooves; a protrusion extending radially outward is formed on the outer wall of the first sleeve 11, and the protrusion spans the two first receiving grooves and the two second receiving grooves along the axial direction of the first sleeve 11. The redundant design of two sealing rings 31 can ensure the reliability of the sliding seal to avoid leakage of insulating gas; by providing a protrusion on the outer wall of the first sleeve 11 with the first receiving groove and the second receiving groove, the weakening of the mechanical properties of the first sleeve 11 caused by the grooves can be balanced, and the structural strength of the first sleeve 11 can be ensured.

[0045] In some preferred embodiments, the first ear plate 12 is arranged at one end of the first sleeve 11 facing away from the second sleeve 21, and the first sleeve assembly 1 further includes a first insulating basin 13, which is detachably connected to the first ear plate 12; the second ear plate 22 is arranged at one end of the second sleeve 21 facing away from the first sleeve 11, and the second sleeve assembly 2 further includes a second insulating basin 23, which is detachably connected to the second ear plate 22; one end of the conductor assembly 5 is mounted on the first insulating basin 13, and the other end is mounted on the second insulating basin 23. By providing the first insulating basin 13 and the second insulating basin 23, the cylinder of the first sleeve 11 and the cylinder of the second sleeve 21 can be insulated, thereby ensuring the safety of power transmission and the personal safety of the maintenance personnel performing maintenance; by providing the detachable connection between the first insulating basin 13 and the first ear plate 12 and the detachable connection between the second insulating basin 23 and the second ear plate 22, the disassembly range can be reduced, and the convenience and efficiency of maintenance can be improved.

[0046] For example, Figure 5During the disassembly of the embodiment shown, it is only necessary to remove the connection between the first ear plate 12 and the first insulating basin 13, and screw the first stopper 43 on the side of the first ear plate 12 facing the second ear plate 22 toward the second ear plate 22, so that the first sleeve 11 can be compressed toward the second sleeve 21 by manpower. Similarly, disassembly can also be performed from one side of the second sleeve assembly 2.

[0047] Further, in Figure 1 In the illustrated embodiment, the conductor assembly 5 includes a conductor body 51 and a contact 52. The conductor body 51 and the contact 52 are detachably connected in sliding manner along the axial direction of the sliding sealing pipe. The contact 52 is installed at one end of the sliding sealing pipe, and the conductor body 51 extends to the other end of the sliding sealing pipe. Specifically, the contact 52 may be provided with a conductive slide rail mechanism connected to the conductor body 51, or the contact 52 may be provided with a slidable quick connector. By providing the conductor body 51 and the contact 52 connected along the axial direction of the sliding sealing pipe, the circuit in the pipeline system can be connected; by providing the detachable connection between the conductor body 51 and the contact 52, it is more convenient for the operation and maintenance personnel to disassemble during maintenance.

[0048] For example, Figure 6 During the disassembly process of the illustrated embodiment, the conductor body 51 may be removed from the contact 52 after the first sleeve 11 is compressed toward the second sleeve 21 .

[0049] In some further embodiments, both the first sleeve 11 and the second sleeve 21 are made of non-ferromagnetic materials. By using non-ferromagnetic materials, the first sleeve 11 and the second sleeve 21 can avoid the generation of eddy currents on the pipe body when the current is large, causing the surface temperature of the pipe body to rise; avoid physical harm to the operation and maintenance personnel, and at the same time improve the service life and performance of the telescopic joint device. Preferably, both the first sleeve 11 and the second sleeve 21 are made of aluminum.

[0050] According to another aspect of the present disclosure, a pipeline system is provided, including a first pipeline segment, a second pipeline segment and the above-mentioned expansion joint device, wherein along the axial direction of the sliding sealing pipe, the first pipeline segment is connected to one end of the expansion joint device, and the second pipeline segment is connected to the other end of the expansion joint device.

[0051] The pipeline system adopts the above-mentioned expansion joint device. Since the expansion joint device has the advantages of small mechanical hidden dangers, high reliability and long service life, the pipeline system also has good quality in corresponding aspects.

[0052] The technical effect of the solution disclosed in the present invention is to avoid using easily deteriorated stainless steel bellows to form a sealed pipe, reduce the mechanical risks of metal fatigue and fracture of the sliding sealed pipe, and improve the reliability and service life of the expansion joint device.

[0053] The above are only preferred embodiments of the present disclosure. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. An expansion joint device, characterized in that: include: A first sleeve assembly (1), the first sleeve assembly (1) comprising a first sleeve (11) and a first ear plate (12) protruding along the radial direction of the first sleeve (11); A second sleeve assembly (2), the second sleeve assembly (2) comprising a second sleeve (21) and a second ear plate (22) protruding radially along the second sleeve (21), the second sleeve (21) being coaxially slidably sleeved with the first sleeve (11); a sealing assembly (3), wherein the sealing assembly (3) is arranged on a side wall of the first sleeve (11) facing the second sleeve (21), and / or the sealing assembly (3) is arranged on a side wall of the second sleeve (21) facing the first sleeve (11), and the first sleeve (11) and the second sleeve (21) are sleeved via the sealing assembly (3) to form a sliding sealing pipeline; A plurality of tie rod assemblies (4), wherein the tie rod assemblies (4) extend along the axial direction of the sliding sealing pipe, one end of the tie rod assembly (4) is slidably matched with the first ear plate (12), and the other end of the tie rod assembly (4) is slidably matched with the second ear plate (22); A retractable conductor assembly (5), wherein the conductor assembly (5) is arranged along the extension direction of the sliding sealing pipe, and within the sliding sealing pipe, one end of the conductor assembly (5) is mounted on the first sleeve assembly (1), and the other end is mounted on the second sleeve assembly (2).

2. The telescopic joint device according to claim 1, characterized in that: The number of the tie rod assemblies (4) is at least two, wherein at least two of the tie rod assemblies (4) are evenly distributed in the circumferential direction relative to the central axis of the sliding sealing pipe.

3. The telescopic joint device according to claim 1, characterized in that: The pull rod assembly (4) comprises a pull rod body (41), at least one elastic member (42), a plurality of first stop members (43) and a plurality of second stop members (44). Wherein, the first stopper (43) is movable along the axial direction of the pull rod body (41); one end of the pull rod body (41) is slidable through the first ear plate (12), and the other end is slidable through the second ear plate (22); Wherein, the elastic member (42), the first stop member (43) and the second stop member (44) are respectively arranged at the joint end where the pull rod body (41) is joined with each of the first ear plate (12) and the second ear plate (22), and the first stop member (43) and the second stop member (44) are respectively arranged on both sides of each of the first ear plate (12) and the second ear plate (22); wherein, on the side close to the first ear plate (12), the elastic member (42) is arranged along the axial direction of the pull rod body (41) between the second stop member (44) and the first ear plate (12) and / or between the first ear plate (12) and the first stop member (43); and / or, on the side close to the second ear plate (22), the elastic member (42) is arranged along the axial direction of the pull rod body (41) between the first stop member (43) and the second ear plate (22) and / or between the second ear plate (22) and the second stop member (44).

4. The telescopic joint device according to claim 3, characterized in that: The elastic member (42) is a disc spring, and the pull rod body (41) passes through the elastic member (42); the first stop member (43) is a nut, and along the axial direction of the pull rod body (41), the first stop member (43) is threadedly matched with the pull rod body (41).

5. The expansion joint device according to claim 1, characterized in that: The sealing assembly (3) comprises at least one sealing ring (31) and at least two guide sleeves (32); the sealing ring (31) is located between the two guide sleeves (32) in the axial direction of the pull rod assembly (4); the guide sleeve (32) is used to guide the sliding sleeve connection between the first sleeve (11) and the second sleeve (21); at least one first receiving groove for receiving the sealing ring (31) and at least two second receiving grooves for receiving the guide sleeves (32) are correspondingly provided on the first sleeve (11) and / or the second sleeve (21).

6. The expansion joint device according to claim 5, characterized in that: The diameter of the first sleeve (11) is greater than the diameter of the second sleeve (21); two first accommodating grooves and two second accommodating grooves are provided on the inner wall of the first sleeve (11), wherein the two first accommodating grooves are located between the two second accommodating grooves; a protrusion extending radially outward is formed on the outer wall of the first sleeve (11), and the protrusion spans the two first accommodating grooves and the two second accommodating grooves along the axial direction of the first sleeve (11).

7. The expansion joint device according to claim 1, characterized in that: The first ear plate (12) is arranged at one end of the first sleeve (11) facing away from the second sleeve (21), and the first sleeve assembly (1) further comprises a first insulating basin (13), and the first insulating basin (13) is detachably connected to the first ear plate (12); The second ear plate (22) is arranged at one end of the second sleeve (21) facing away from the first sleeve (11), and the second sleeve assembly (2) further comprises a second insulating basin (23), and the second insulating basin (23) is detachably connected to the second ear plate (22); One end of the conductor assembly (5) is mounted on the first insulating basin (13), and the other end is mounted on the second insulating basin (23).

8. The expansion joint device according to claim 1, characterized in that: The conductor assembly (5) comprises a conductor body (51) and a contact (52). Along the axial direction of the sliding sealing pipe, the conductor body (51) and the contact (52) are detachably connected in sliding relation. The contact (52) is mounted on one end of the sliding sealing pipe, and the conductor body (51) extends to the other end of the sliding sealing pipe.

9. The expansion joint device according to any one of claims 1 to 8, characterized in that: The first sleeve (11) and the second sleeve (21) are both made of non-ferromagnetic materials.

10. A pipeline system, characterized in that: It comprises a first pipeline segment, a second pipeline segment and the telescopic joint device according to any one of claims 1 to 9, wherein along the axial direction of the sliding sealing pipe, the first pipeline segment is connected to one end of the telescopic joint device, and the second pipeline segment is connected to the other end of the telescopic joint device.

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