阅读说明：本技术 一种管母线的中间连接接头及连接方法 (Intermediate connecting joint and connecting method of tubular bus ) 是由 程坤 于 2020-07-20 设计创作，主要内容包括：本发明公开了一种管母线的中间连接接头及连接方法,属于管母线技术领域。中间连接接头包括管型接头,每根管母线的连接端内设有涨紧部件且其上沿其轴线设有两条开口槽；两条开口槽均沿管母线的径向设置且相对设置,开口槽的宽度为6-15mm；涨紧部件包括双头螺杆及其两端螺纹连接的楔形头,楔形头的外侧嵌入对应侧的开口槽中并在其向外运动时将开口槽扩张；双头螺杆沿管母线的径向设置,其两端的螺纹方向相反,其一端或两端的端面露出并能与拧动工具结合以使其旋转；开口槽和管型接头上分别对应设有供拧动工具穿过并拧动的第一通孔和第二通孔。具有连接稳固、装配简单和绝缘处理后表面平整等优点。(The invention discloses an intermediate connecting joint of a tubular bus and a connecting method, and belongs to the technical field of tubular buses. 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.)

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.

10. A method of connecting tubular bus bars, the method comprising:

(1) processing two open grooves (7) at the connecting end of the tubular bus bar (1), wherein the two open grooves (7) are arranged oppositely and have the width of 6-15mm, and each open groove (7) is processed with at least two first through holes (12) for assembling tensioning parts; correspondingly, a second through hole (13) for assembling a tensioning part is processed on 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-head screw (8) is screwed or not screwed according to requirements;

(3) butting two tubular buses (1) assembled with tensioning components, sleeving tubular joints (2) outside connecting ends of the two tubular buses, and enabling second through holes (13) to be opposite to corresponding first through holes (12);

(4) the double-end screw (8) is screwed by the screwing tool (11) to enable the wedge-shaped head (9) to move outwards to expand the open slot (7) so that the tubular bus (1) is in close contact with the inner wall of the tubular joint (2);

(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 then the tubular joint (2) and the joint of the tubular joint (2) and the tubular bus (1) are subjected to insulation treatment.

Technical Field

The invention belongs to the technical field of tubular buses, and particularly relates to an intermediate connecting joint and a connecting method of a tubular bus.

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 busbar conductors 1, a strip seam is arranged on the tubular joint 2 along the axial direction of the tubular joint, 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.

Disclosure of Invention

In order to solve the above problems, embodiments of the present invention provide an intermediate connection joint for a tubular bus and a connection method, which have the advantages of stable connection, simple assembly, flat surface after insulation treatment, and the like. The technical scheme is as follows:

on one hand, the embodiment of the invention provides an intermediate connecting joint of a tubular bus, which 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 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 invention is 150-250mm, the inner diameter of the tubular joint is 0.3-0.5mm larger than the outer diameter of the tubular busbar 1, and the material of the tubular joint is the same as that of the tubular busbar 1.

Further, in the embodiment of the present invention, after the assembling is completed, the second through hole 13 is closed by an insulating material or a semiconductive material.

In the embodiment of the invention, the distance between the adjacent tensioning parts 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, an inner hexagon 14 is coaxially arranged on the end surface of the double-headed screw 8 in the embodiment of the present invention, the screwing tool 11 is an inner hexagon wrench which is matched with the inner hexagon 14, the first through hole 12 and the second through hole 13 are circular through holes which are collinear with the double-headed screw 8, and the thread 10 is a fine thread.

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

The wedge head 9 in the embodiment of the invention comprises a threaded connection part 15 arranged along the radial direction of the tubular busbar 1 and two wedge parts 16 at two sides of the threaded connection part 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.

On the other hand, the embodiment of the invention also provides a connection method of the tubular bus, which comprises the following steps:

(1) processing two open grooves 7 on the connecting end of the tubular bus bar 1, wherein the two open grooves 7 are oppositely arranged and have the width of 6-15mm, and each open groove 7 is processed with at least two first through holes 12 for assembling tensioning parts; correspondingly, a second through hole 13 for assembling a tensioning part is processed on the tubular joint 2;

(2) embedding the outer side of the wedge-shaped part 16 of the tensioning part into the opening groove 7 on the corresponding side, sliding the wedge-shaped part to the corresponding first through hole 12 along the opening groove 7, and screwing or not screwing the double-threaded screw 8 as required;

(3) butting two tubular buses 1 assembled 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) screwing the double-end screw 8 by a screwing tool 11 to enable the wedge-shaped head 9 to move 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;

(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 then the tubular joint 2 and the joint of the tubular joint 2 and the tubular bus 1 are subjected to insulation treatment.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: the embodiment of the invention provides an intermediate connecting joint of a tubular bus and a connecting method, which have the following advantages:

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 diagram of an intermediate coupling joint for a tubular busbar according to an embodiment of the present invention;

FIG. 5 is a longitudinal cross-sectional view of an intermediate connection joint of a tubular busbar as provided by an embodiment of the present invention;

FIG. 6 is a transverse cross-sectional view of an intermediate connection joint of a tubular busbar as provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a connecting end of a tubular busbar according to an embodiment of the invention;

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

FIG. 9 is a top view of a wedge head provided by 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-ended screw according to 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 more apparent, the present invention will be described in further detail with reference to the accompanying drawings.