CN212323235U

CN212323235U - Intermediate connection joint of tubular bus

Info

Publication number: CN212323235U
Application number: CN202021427802.8U
Authority: CN
Inventors: 程坤
Original assignee: Hubei Xinghe Electric Power New Material Co ltd
Current assignee: Hubei Xinghe Electric Power New Material Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-01-08
Anticipated expiration: 2030-07-20

Abstract

The utility model discloses an intermediate junction connects of tubular busbar belongs to tubular busbar technical field. The middle connecting joint comprises a tubular joint, a tensioning part is arranged in the connecting end of each tubular bus, and two open grooves are formed in the connecting end of each tubular bus along the axis of the connecting end; the two open slots are arranged along the radial direction of the tube bus and are opposite to each other, and the width of each open slot is 6-15 mm; the tensioning component comprises a double-head screw and a wedge-shaped head, wherein the two ends of the double-head screw are in threaded connection, the outer side of the wedge-shaped head is embedded into an open slot on the corresponding side, and the open slot is expanded when the wedge-shaped head moves outwards; the double-threaded screw is arranged along the radial direction of the tube generatrix, the thread directions of two ends of the double-threaded screw are opposite, and one end or the end surfaces of the two ends of the double-threaded screw are exposed and can be combined with a screwing tool to rotate; the open slot and the pipe type joint are respectively and correspondingly provided with a first through hole and a second through hole for a screwing tool to pass through and screw. The connecting structure has the advantages of stable connection, simple assembly, smooth surface after insulation treatment and the like.

Description

Intermediate connection joint of tubular bus

Technical Field

The utility model belongs to the technical field of the tubular busbar, in particular to tubular busbar's intermediate junction connects.

Background

With the application of a large number of tubular buses, particularly the application of an insulating tubular bus, higher and higher requirements are provided for the mode and the requirement of intermediate connection, and according to the requirement of bus connection, the joint part needs to be reliably connected, the temperature rise is lower than that of a tubular bus body, and the requirements of enough short-circuit current resistance, tubular bus operation vibration resistance, no looseness caused by expansion with heat and contraction with cold and the like can be met.

The traditional connection modes of external crimping of a tubular bus external joint, intermediate welding of the tubular bus, crimping and welding of a stainless steel hoop and the like are adopted, so that the defects that the connection of two sections of tubular buses is difficult to ensure to be smooth, the requirement on field installation operation is high, more required equipment is needed, the operation is complex and the like are overcome; or the difficulty is brought to the external insulation manufacture of the tube bus, and the appearance and the product quality are influenced.

As shown in fig. 1, as one of the prior art, a tubular joint 2 is externally sleeved at the joint of the connecting ends of two tubular buses 1 (conductors), the inner diameter of the tubular joint 2 is smaller than the outer diameter of the tubular bus 1, the installation is realized by expansion with heat and contraction with cold, the installation is complicated, and a heating device is required on site.

For example, patent No. CN 201610151831.8 discloses a method for connecting insulated tubular bus bar connection devices, which comprises the following steps:

(1) cleaning the two ends of the insulated tubular bus and the inner and outer surfaces of the tubular bus joint, polishing burrs, and carrying out tinning treatment;

(2) heating and insulating the tubular bus joint at a certain temperature, and properly adjusting and controlling the heating and insulating temperature and time according to the magnitude of interference and the expansion condition of the tubular bus joint;

(3) when the inner diameter of the tubular bus joint expands to be larger than the outer diameter of the tubular bus under the heating and heat preservation effects, stopping heating and heat preservation, clamping and fixing the middle part of the tubular bus joint through a tool clamp, and quickly inserting the connecting part of the insulated tubular bus into the tubular bus joint;

(4) cooling the joint of the tube bus joint and the insulated tube bus;

(5) and after cooling, carrying out insulation treatment on the joint of the tubular bus and the insulating tubular bus.

As shown in fig. 2, in the second conventional technique, a connecting conductor 3 is provided inside a joint between the connecting ends of two tubular bus bars 1, and the connecting conductor 3 is fixed to the tubular bus bars 1 by welding (intermediate welding point 4 and both end welding points 5). The requirement on field installation operation is high, and workers with high welding skills are required to realize installation.

As shown in fig. 3, in the third prior art, a tubular joint 2 (different from the present invention) is sleeved outside the joint of two tubular bus conductors 1, a strip seam is arranged on the tubular joint 2 along the axial direction thereof, and a stainless steel hoop 6 is sleeved outside the tubular joint 2 to tighten the tubular joint 2; the current needs special tightening equipment, brings difficulty to the manufacture of external insulation of the tube bus conductor, and influences appearance and product quality.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the embodiment of the utility model provides an intermediate junction connects of tubular busbar has to connect advantages such as firm, the assembly is simple and insulation treatment back surfacing. The technical scheme is as follows:

the embodiment of the utility model provides an intermediate connection joint of tubular bus, which comprises a tubular joint 2 sleeved outside the connection ends of two tubular buses 1, wherein the tubular joint 2 is a metal round tube arranged along the axis of the tubular bus 1, and the inner diameter of the tubular joint is larger than the outer diameter of the tubular bus 1; at least two tensioning parts are arranged in the connecting end of each bus bar 1, two open slots 7 are formed in the connecting end along the axis of the connecting end, and the tensioning parts are arranged side by side in the direction of the open slots 7; the two open slots 7 are arranged along the radial direction of the tubular bus bar 1 and are opposite to each other, and the width of each open slot 7 is 6-15 mm; the tensioning component comprises a double-thread screw 8 and two wedge-shaped heads 9 in threaded connection with the two ends of the double-thread screw, and the outer sides of the wedge-shaped heads 9 are embedded into the open grooves 7 on the corresponding sides and expand the open grooves 7 when the wedge-shaped heads move outwards; the double-thread screw 8 is arranged along the radial direction of the tubular bus 1, the threads 10 at two ends of the double-thread screw are opposite in direction, and the end surface of one end or two ends of the double-thread screw is exposed and can be combined with a screwing tool 11 to rotate; the open slot 7 and the pipe type joint 2 are respectively and correspondingly provided with a first through hole 12 and a second through hole 13 for a screwing tool 11 to pass through and screw.

Preferably, end surfaces of two ends of the double-end screw 8 in the embodiment of the present invention are exposed and can be combined with the screwing tool 11, and two sides of the open slot 7 and two sides of the pipe type joint 2 are respectively and correspondingly provided with a first through hole 12 and a second through hole 13; the middle connecting joints are symmetrically arranged at the connecting part of the two tubular bus bars 1.

Specifically, the length of the tubular joint 2 in the embodiment of the present invention is 150-250mm, the inner diameter thereof is 0.3-0.5mm larger than the outer diameter of the tubular bus 1, and the material thereof is the same as the material of the tubular bus 1.

Further, in the embodiment of the present invention, after the assembly is completed, the second through hole 13 is closed by an insulating material or a semi-conductive material.

The distance between adjacent tensioning parts in the embodiment of the utility model is 40-80mm, and the distance between the end part of the open slot 7 and the adjacent tensioning part is 20-50 mm.

Specifically, the embodiment of the present invention provides an inner hexagonal socket 14 is coaxially disposed on the end surface of the double-headed screw 8, the screwing tool 11 is an inner hexagonal wrench cooperating with the inner hexagonal socket 14, the first through hole 12 and the second through hole 13 are circular through holes collinear with the double-headed screw 8, and the thread 10 is a fine thread.

Wherein, the one end of the open slot 7 far away from the pipe joint 2 is flush with the corresponding end of the pipe joint 2 or extends 0-10mm to the direction far away from the pipe joint 2.

The wedge-shaped head 9 in the embodiment of the present invention includes a threaded connection portion 15 radially disposed along the pipe bus 1 and two wedge-shaped portions 16 on both sides of the threaded connection portion 15; the threaded connecting part 15 is in threaded connection with the double-thread screw 8, and the outer side of the threaded connecting part is positioned at the inner side of the first through hole 12 or embedded in the first through hole 12; the wedge-shaped portion 16 is arranged along the direction of the open slot 7, is a wedge-shaped block with a large inside and a small outside, is embedded in the open slot 7 to expand the open slot 7, and protrudes outwards at the outer end relative to the threaded connection portion 15.

Specifically, the threaded connection portion 15 in the embodiment of the present invention is a cylindrical structure or a conical structure that can be inserted into the first through hole 12; the wedge-shaped part 16 is an isosceles trapezoid block, the perpendicular bisector of the bottom edge of the isosceles trapezoid block is arranged along the radial direction of the pipe generatrix 1, the length of the isosceles trapezoid block is 7-15mm, and the bottom angle of the isosceles trapezoid block is 50-70 degrees.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides an intermediate junction connects of pipe generating line has following advantage:

1. the double-headed bolt is adopted to expand the notch which is arranged on the tubular bus in advance and is in close contact with the inner wall of the tubular joint, and the tubular bus is firmly contacted with the tubular joint and is not easy to loosen.

2. The stud is rotated by a tool, the stud drives the wedge-shaped heads at the two ends to move away from each other, the end part of the tubular bus is expanded by expanding the open slot, the outer circle is enlarged, the tubular bus is contacted with the inner wall of the tubular joint, and the site construction is simple and convenient.

3. After the connection is finished, the pre-opened hole slot is closed, the insulation can be manufactured for the joint of the tubular bus, and the surface is flat after the insulation is manufactured.

Drawings

FIG. 1 is a schematic structural diagram of a prior art tubular bus bar connection in a first manner;

FIG. 2 is a schematic structural diagram of a tubular bus bar connected in a second mode in the prior art;

FIG. 3 is a schematic structural diagram of a prior art tubular bus bar using a triple connection;

fig. 4 is a schematic structural diagram of an intermediate connection joint of a tubular bus bar according to an embodiment of the present invention;

FIG. 5 is a longitudinal cross-sectional view of an intermediate coupling fitting for a tubular busbar according to an embodiment of the present invention;

FIG. 6 is a transverse cross-sectional view of an intermediate coupling fitting for a tubular busbar according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a connection end of a tubular bus bar provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a pipe joint according to an embodiment of the present invention;

fig. 9 is a top view of a wedge head provided in accordance with an embodiment of the present invention;

fig. 10 is a side view of a wedge head provided by an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a double-headed screw provided by an embodiment of the present invention.

In the figure: 1 tubular bus, 2 tubular joint, 3 connecting conductor, 4 middle welding points, 5 both ends welding points, 6 stainless steel staple bolts, 7 open slots, 8 double-threaded screw, 9 wedge heads, 10 screw threads, 11 twisting tool, 12 first through holes, 13 second through holes, 14 inner hexagonal, 15 threaded connection parts, 16 wedge parts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Referring to fig. 4 to 11, embodiment 1 provides an intermediate connection joint of a tubular busbar, including a tubular joint 2 sleeved outside connection ends (which are conductors and have no insulating layer outside) of two tubular busbars 1, where the tubular joint 2 is a metal circular tube arranged along an axis of the tubular busbar 1, and has an inner diameter larger than an outer diameter of the tubular busbar 1, and a length and a size similar to those of the prior art. The structure is basically the same as that of the existing intermediate connection joint, except that: in this embodiment, at least two tensioning members (for providing a fastening effect and ensuring the coaxiality of the two busbars 1) are arranged in the connecting end of each busbar 1, two open slots 7 are formed in the connecting end along the axis of the connecting end, and the plurality of tensioning members are arranged side by side in the direction of the open slots 7. The two open grooves 7 are arranged along the radial direction of the tubular busbar 1 and are arranged oppositely, and the width of each open groove 7 is 6-15mm (specifically 10 mm). The tensioning component comprises a double-head screw 8, two wedge heads 9 which are in threaded connection with the two ends of the double-head screw, and the like; the outer side of the wedge-shaped head 9 is embedded into the open slot 7 on the corresponding side and expands the open slot 7 when the wedge-shaped head moves outwards, and the wedge-shaped head 9 can be a wedge-shaped block, a combination of the threaded connection part 15 and the threaded connection part 15, or other structures which move outwards and expand the open slot 7. The double-threaded screw 8 is arranged in the radial direction of the tubular busbar 1, preferably with a length smaller than the diameter of the tubular joint 2, with opposite threads 10 at both ends (each threaded with a wedge 9), and with one or preferably both (end) ends exposed (relative to the tubular joint 2) and able to be engaged (in particular inserted) by a screwing tool 11 to rotate it (and thus move the wedge 9 outwards). The open slot 7 and one side or two sides of the tubular joint 2 are respectively and correspondingly provided with a first through hole 12 (for example, 2 holes are arranged on one side of each tubular bus 1 (4 holes are arranged on two sides in total)) and a second through hole 13 (for example, 4 holes are arranged on one side of the tubular joint 2 (8 holes are arranged on two sides in total)), which are used for the screwing tool 11 to pass through and screw, and the first through hole 12 and the second through hole 13 are both opposite to the double-thread screw 8.

Preferably, referring to fig. 4-6, the end surfaces of the two ends of the double-ended screw 8 in the embodiment of the present invention are exposed and can be combined with the screwing tool 11; correspondingly, both sides of the open slot 7 and the tubular joint 2 are respectively provided with a first through hole 12 and a second through hole 13. The middle connecting joints are symmetrically arranged at the connecting part of the two tubular bus bars 1. The structure can ensure the stability of the tubular bus bar 1 and the tubular bus bar 1.

Further, in the embodiment of the utility model provides an in, tight part assembly back rises, second through-hole 13 is sealed by insulating material (specifically can be silicon rubber) or semiconductive material (the common material in electric field) etc. be convenient for make on the generating line insulating, have most advanced discharge and uneven when avoiding making insulating. After the second through hole 13 is closed, an insulating layer is provided outside the tubular joint 2 and the joint of the tubular joint 2 and the tubular busbar 1 (in accordance with the conventional technique).

Wherein, the distance between the adjacent tension components in the embodiment of the utility model is 40-80mm, and the distance between the end part of the open slot 7 and the adjacent tension components is 20-50mm (preferably, slightly smaller than half of the distance between the adjacent tension components). The plurality of tensioning members are preferably relatively evenly distributed to ensure even force along the tubular busbar 1.

Specifically, referring to fig. 4 to 6, the end surface of the double-ended screw 8 in the embodiment of the present invention is coaxially provided with an inner hexagon 14, the screwing tool 11 is an inner hexagon wrench cooperating with the inner hexagon 14, the first through hole 12 and the second through hole 13 are circular through holes (larger than the cross section of the hexagon wrench) collinear with the double-ended screw 8, and the thread 10 is a fine thread (the pitch is smaller to ensure that the wedge 9 moves outward slightly to avoid breaking the pipe bus 1 when the double-ended screw 8 is rotated each time).

Referring to fig. 4 and 5, in the embodiment of the present invention, one end (the other end opening) of the open slot 7 away from the tubular joint 2 is flush with the corresponding end of the tubular joint 2 or extends 0-10mm (excluding 0 mm) in the direction away from the tubular joint 2 to ensure the expansion of the tubular bus bar 1. Preferably, one end of the open groove 7 away from the pipe type joint 2 extends 5-10mm away from the pipe type joint 2 relative to the corresponding end of the pipe type joint 2.

More specifically, for a 60-type pipe bus, the length of the pipe joint 2 is 180mm, the length of the open groove 7 is 100mm (10 mm extending outward relative to the pipe joint 2), 4 second through holes 13 (single side, the same applies to the following) are provided on the pipe joint 2, and the distances (center distances) between the 4 second through holes 13 and one end of the pipe joint 2 are 25mm, 65mm, 115mm and 155mm, respectively. For a 100-type pipe bus, the length of the pipe joint 2 is 220mm, the length of the open slot 7 is 115mm (5 mm extending outwards relative to the pipe joint 2), 4 second through holes 13 are arranged on the pipe joint 2, and the distances (center distances) between the 4 second through holes 13 and one end of the pipe joint 2 are respectively 25mm, 85mm, 135mm and 195 mm.

With reference to fig. 5-6 and 9-10, the wedge 9 of the embodiment of the present invention includes a threaded connection portion 15 disposed along the radial direction of the pipe bus 1 and two wedge portions 16 on both sides of the threaded connection portion 15 (the two wedge portions 16 are symmetrically disposed with respect to the threaded connection portion 15, and form a T-shaped structure with the threaded connection portion 15), and the like. The threaded connection portion 15 is threadedly connected to the stud bolt 8 (specifically, the threaded connection portion 15 is provided with a threaded hole in the radial direction of the pipe bus 1 to be engaged with the stud bolt 8), and the outer side thereof (exposed) is located inside (preferably) the first through hole 12 or is fitted into the first through hole 12. The wedge-shaped part 16 is arranged along the direction of the open slot 7, is a wedge-shaped block with a large inside and a small outside, is embedded into the open slot 7 to expand the open slot 7, and has an outer end protruding outwards relative to the threaded connection part 15 (when the tension component is initially installed, the wedge-shaped head 9 is installed in place and the rotation of the wedge-shaped head 9 is avoided when the double-threaded screw 8 is screwed).

Specifically, the threaded connection portion 15 in the embodiment of the present invention is a cylindrical structure (located inside the open slot 7) or a conical structure (embedded in the first through hole 12, and the taper thereof is matched with the wedge portion 16) that can be embedded in the first through hole 12. The wedge-shaped part 16 is an isosceles trapezoid block, the perpendicular bisector of the bottom edge of the isosceles trapezoid block is arranged along the radial direction of the pipe generatrix 1, the length of the isosceles trapezoid block is 7-15mm, and the bottom angle of the isosceles trapezoid block is 50-70 degrees.

Example 2

Referring to fig. 4 to 11, embodiment 2 provides a method of connecting tubular bus bars, the method including:

(1) two open grooves 7 are processed on the connecting end of the tubular bus bar 1, the two open grooves 7 are arranged oppositely, the width of each open groove 7 is 6-15mm, and at least two first through holes 12 for assembling tensioning parts are processed on each open groove 7. Correspondingly, a second through hole 13 for assembling a tensioning member is machined in the tubular joint 2.

(2) The outer side of the wedge-shaped part 16 of the tensioning part is embedded into the opening groove 7 on the corresponding side and slides to the corresponding first through hole 12 along the opening groove 7, and the double-thread screw 8 is screwed (the conical surface of the wedge-shaped part 16 is in contact with the opening groove 7, so that the tubular bus bar 1 cannot be deformed) or not screwed according to needs.

(3) And butting two tubular buses 1 which are provided with tensioning parts, sleeving tubular joints 2 on the connecting ends of the two tubular buses, and enabling the second through holes 13 to be opposite to the corresponding first through holes 12.

(4) The double-end screw 8 is screwed by the screwing tool 11, so that the wedge-shaped head 9 moves outwards to expand the open slot 7 to enable the tubular bus 1 to be in close contact with the inner wall of the tubular joint 2, the contact area and the contact tightness need to meet the physical connection requirement and the electrical requirement of the tubular bus 1 and the tubular joint 2, and the requirement of the bus installation specification in the power industry is met.

(5) After the tensioning part is assembled, the second through hole 13 is sealed by adopting an insulating material or a semi-conductive material and the like, and then the tubular joint 2 and the joint of the tubular joint 2 and the tubular bus 1 are subjected to insulation treatment (similar to a conventional way).

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The intermediate connecting joint of the tubular bus comprises a tubular joint (2) sleeved outside the connecting ends of two tubular buses (1), wherein the tubular joint (2) is a metal round tube arranged along the axis of the tubular bus (1) and has an inner diameter larger than the outer diameter of the tubular bus (1); the pipe bus is characterized in that at least two tensioning parts are arranged in the connecting end of each pipe bus (1), two open grooves (7) are formed in the connecting end along the axis of the connecting end, and the tensioning parts are arranged side by side in the direction of the open grooves (7); the two open slots (7) are arranged along the radial direction of the tubular bus (1) and are arranged oppositely, and the width of each open slot (7) is 6-15 mm; the tensioning component comprises a double-head screw (8) and two wedge heads (9) which are in threaded connection with two ends of the double-head screw, wherein the outer sides of the wedge heads (9) are embedded into the open grooves (7) on the corresponding sides and expand the open grooves (7) when the wedge heads move outwards; the double-thread screw (8) is arranged along the radial direction of the tubular bus (1), the threads (10) at two ends of the double-thread screw are opposite in direction, and the end surface of one end or two ends of the double-thread screw is exposed and can be combined with a screwing tool (11) to rotate; the open slot (7) and the pipe type joint (2) are respectively and correspondingly provided with a first through hole (12) and a second through hole (13) for a screwing tool (11) to pass through and screw.

2. The intermediate connection joint of tubular bus-bar according to claim 1, wherein the end surfaces of both ends of the double-threaded screw (8) are exposed and can be combined with a screwing tool (11), and both sides of the open slot (7) and the tubular joint (2) are respectively provided with a first through hole (12) and a second through hole (13) correspondingly; the middle connecting joints are symmetrically arranged at the connecting positions of the two tubular buses (1).

3. The intermediate connection joint of tubular busbar according to claim 1, wherein the tubular joint (2) has a length of 150 and 250mm, an inner diameter 0.3-0.5mm larger than the outer diameter of the tubular busbar (1), and the material is the same as that of the tubular busbar (1).

4. Tubular busbar intermediate connection joint according to claim 1, wherein the second through hole (13) is closed by an insulating or semiconducting material after assembly.

5. The intermediate connection joint of tubular bus-bar according to claim 1, wherein the distance between adjacent tension members is 40-80mm, and the distance between the end of the open slot (7) and the adjacent tension member is 20-50 mm.

6. The intermediate connection joint of tubular bus-bar according to claim 1, wherein the end face of the double-headed screw (8) is coaxially provided with an inner hexagonal socket (14), the screwing tool (11) is an inner hexagonal wrench engaged with the inner hexagonal socket (14), the first through hole (12) and the second through hole (13) are circular through holes collinear with the double-headed screw (8), and the thread (10) is a fine thread.

7. Intermediate connection joint for tubular busbars according to claim 1, characterised in that the end of the open slot (7) remote from the tubular joint (2) is flush with the corresponding end of the tubular joint (2) or extends 0-10mm away from the tubular joint (2).

8. Intermediate connection joint for tubular busbars according to claim 1, characterised in that the wedge (9) comprises a threaded connection (15) arranged radially along the tubular busbar (1) and two wedges (16) on either side of the threaded connection (15); the threaded connecting part (15) is in threaded connection with the double-thread screw (8), and the outer side of the threaded connecting part is positioned on the inner side of the first through hole (12) or embedded into the first through hole (12); the wedge-shaped part (16) is arranged along the direction of the open slot (7), is a wedge-shaped block with a large inner part and a small outer part, is embedded into the open slot (7) to expand the open slot (7), and protrudes outwards relative to the threaded connecting part (15) at the outer end.

9. Intermediate connection joint for tubular busbars according to claim 8, characterised in that the threaded connection (15) is of cylindrical configuration or of conical configuration which can be inserted in the first through hole (12); the wedge-shaped part (16) is an isosceles trapezoid block, the perpendicular bisector of the bottom edge of the wedge-shaped part is arranged along the radial direction of the pipe generatrix (1), the length of the wedge-shaped part is 7-15mm, and the bottom angle of the wedge-shaped part is 50-70 degrees.