CN109244930B - Electric power that can regard as interim side to draw earth anchor overhauls auxiliary device - Google Patents
Electric power that can regard as interim side to draw earth anchor overhauls auxiliary device Download PDFInfo
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- CN109244930B CN109244930B CN201811119315.2A CN201811119315A CN109244930B CN 109244930 B CN109244930 B CN 109244930B CN 201811119315 A CN201811119315 A CN 201811119315A CN 109244930 B CN109244930 B CN 109244930B
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000003825 pressing Methods 0.000 claims description 153
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
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- 229910000975 Carbon steel Inorganic materials 0.000 claims description 5
- 239000010962 carbon steel Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
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- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical group C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 238000004873 anchoring Methods 0.000 description 12
- 239000011324 bead Substances 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 210000005056 cell body Anatomy 0.000 description 6
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses an electric power overhaul auxiliary device capable of serving as a temporary side-pull ground anchor, which comprises a ground anchor rod and a wiring part, wherein the wiring part comprises a wiring board and a wire part, the wire part comprises a stud, a nut and a lead wire, and further comprises a hoop, a disc body and a fastening bolt, the hoop is in a sleeve shape, the disc body is in a disc-shaped structure, the middle part of the disc body is provided with a through hole, the lower end of the hoop is welded with the disc body, and the axis of the hoop is collinear with the axis of the through hole; the side wall of the hoop body is also provided with a plurality of internal thread holes, the internal thread holes all penetrate through the side wall of the hoop body, and each internal thread hole is connected with one fastening bolt in a threaded manner; the hoop and the disk body are sleeved on the ground anchor rod through respective holes, and the disk body is located on the lower side of the hoop. This electric power overhauls auxiliary device not only can realize ground protection, can regard as interim side simultaneously and draw the earth anchor, can effectively improve maintainer's operating efficiency.
Description
Technical Field
The invention relates to the technical field of electric power engineering, in particular to an electric power overhaul auxiliary device capable of serving as a temporary side pull ground anchor.
Background
In the use and maintenance process of the existing power system and rear-end electric equipment, a protection device is often required to be additionally arranged to realize system grounding connection and equipment grounding electrical connection. Such as: in the cable maintenance process, in order to guarantee the personal safety of maintenance personnel, grounding of a corresponding maintenance circuit is required before maintenance, so that electric shock injury to the maintenance personnel due to power transmission errors is avoided; when the electrical appliance is inspected and overhauled in the using process, the condition of temporary grounding also exists.
For the corresponding protection device, in the prior art, a temporary grounding anchor may be pre-buried near the grounding point, and for this occasion, an electrical connection line is used to connect the grounding anchor with a corresponding cable or equipment. However, in most cases, especially for power line grounding, a pre-buried grounding anchor is not generally provided on the site, and under such a situation, a temporary anchor rod is generally adopted to be anchored into the ground, and the corresponding to-be-repaired line is electrically connected with the ground through a lead wire.
Further optimizing the structural design of the protection device to optimize the conductive performance of the protection device is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
Aiming at the problem that the structural design of the further optimized protection device is provided to optimize the electric conductivity of the protection device, which is a problem to be solved urgently by technical personnel in the field, the invention provides the electric power overhaul auxiliary device capable of being used as the temporary side pull ground anchor.
An electric power overhaul auxiliary device capable of serving as a temporary side-pulling ground anchor comprises a ground anchor rod and a wiring part arranged on the ground anchor rod, wherein the wiring part comprises a wiring board and a wire guiding part, the wire guiding part comprises a stud, a nut and a lead wire, the wiring board is electrically connected with the ground anchor rod, one end of the stud is welded on the wiring board, the nut is in threaded connection with the stud, the wiring head of the lead wire is clamped between the wiring board and the nut, the electric power overhaul auxiliary device further comprises a hoop, a disc body and a fastening bolt, the hoop is in a sleeve shape, the disc body is in a disc-shaped structure with a through hole in the middle, the lower end of the hoop is in welded connection with the disc body, and the axis of the hoop;
the side wall of the hoop is also provided with a plurality of internal thread holes, the internal thread holes all penetrate through the side wall of the hoop, and each internal thread hole is connected with one fastening bolt in a threaded manner;
the hoop and the disk body are sleeved on the ground anchor rod through respective holes, and the disk body is located on the lower side of the hoop.
Among the prior art, if overhaul to outdoor power cable, often meet and need set up earthing device in order to carry out ground protection, need set up the side and draw the earth anchor to corresponding conductor portion for provide the cable and prevent rocking restraint etc.. However, for the grounding device, although the ground anchor rod included in the grounding device needs to be anchored into the ground, the ground anchor rod is not suitable to be pulled laterally in consideration of the electrical conductivity between the ground anchor rod and the ground, so as to avoid the ground anchor rod from having a large arc deflection relative to the original anchoring state after being anchored. Therefore, in the prior art, the side pull ground anchor and the grounding ground anchor are generally arranged separately, but aiming at the mountainous area where the earth surface is mostly rock, two suitable anchor sites are difficult to find, and the efficiency of outdoor electric power overhaul construction is not facilitated.
In this scheme, set up as still install hoop and disk body on the ground stock, this scheme is when using, at first, rotate fastening bolt and make fastening bolt not take place to extrude each other with the side of ground stock, after ground stock anchor goes into the certain degree of depth in the underground, trample the mode of disk body or hoop through operating personnel for the ground of disk body contacts with earth's surface, then rotate fastening bolt, make and produce certain normal pressure between fastening bolt and the ground stock side, through the frictional force that the normal pressure produced makes the hoop fixed in the particular position of ground stock. Therefore, when the ground anchor rod is used and the ground anchor rod is laterally pulled as a ground anchor rod, the disk body is synchronously tilted with the ground anchor rod when the ground anchor rod is tilted, and at the moment, because the disk body has a certain contact area with the ground surface, the acting force between the disk body and the ground surface can prevent the ground anchor rod from being further tilted to a certain degree, and particularly when exposed rocks are arranged around the ground anchor rod, the part of the disk body, which is dispersed to the periphery of the ground anchor rod, acts on the rocks, so that the ground anchor rod on the wall surface can be well laterally pulled and can be tilted to a greater degree relative to the original state. The connection mode of the hoop and the ground anchor rod is mutually restricted through the fastening bolt, so that the axial line position of the anchor rod at the position of the disc body can be well adapted to the anchoring depth of the ground anchor rod and the concave-convex condition of the ground surface around the ground anchor rod.
The scheme not only can realize the temporary protection of the ground connection on the spot of corresponding cable or equipment through wiring portion more than promptly, simultaneously when needs ground stock provide the side pulling force, through disk body, hoop and fastening bolt can make ground stock still have the electric conductivity performance of ideal with the ground under can providing the side pulling force, and this scheme of adoption can effectively improve maintainer's operating efficiency.
The further technical scheme is as follows:
the screw bolt and the screw cap are made of carbon steel, and the pressing cap is annular;
the pressing cap is sleeved on the stud, and the pressing cap is positioned between the connector lug and the nut;
still be provided with the bead on the side of double-screw bolt, press still be provided with on the cap be used for with bead complex cell body when pressing the cap cover to locate on the double-screw bolt, the bead embedding in the cell body, just the bead is used for through self receiving the shear, hinders to press the cap to rotate around the double-screw bolt.
Conventionally, a temporarily installed power protection device generally employs a ground anchor and a lead wire as an electrical connection wire between the ground anchor and a device or apparatus to be grounded corresponding to a line to be repaired. In consideration of convenience of the ground anchor rod and the ground, the ground anchor rod and the lead wire are generally arranged in a detachable connection manner: before the ground anchor rod is anchored into the ground, the lead wire is separated from the ground anchor rod so as to facilitate the anchoring of the ground anchor rod and avoid the damage to the lead wire in the anchoring process of the ground anchor rod; the separation of the lead wire and the ground anchor rod is completed before the ground anchor rod is pulled out, so that the ground anchor rod is conveniently pulled out, and the lead wire is prevented from being damaged in the pulling-out process of the ground anchor rod.
However, in the prior art, a connection method between the wiring board and the lead wire is generally adopted, in which a wire holder is disposed on the wiring board, the wire holder includes a rectangular tube-shaped wire inserting cylinder, the wire inserting cylinder is fixedly connected with the wiring board, one or more wire pressing screws are connected to the wire inserting cylinder, and after the terminal of the lead wire is inserted into the wire inserting cylinder, the lead wire is fixedly connected with the wire holder by applying pressure to the lead wire through the wire pressing screws. In the above connection manner, since the diameter of the wire pressing screw should not be set too large, the area of positive pressure between the lead wire and the wire inserting cylinder and between the lead wire and the wire pressing screw is limited by the diameter of the wire pressing screw, so that the connection reliability of the lead wire and the wire holder is poor, and the resistance value of the connection position of the lead wire on the protection device is large, which is not only unfavorable for the safety of the use of the protection device, but also unfavorable for the grounding performance of the protection device.
In this scheme, the connecting portion that is used for being connected with the lead wire electricity on the wiring board is promptly for the wire portion on the wiring board, if through the tip at the lead wire, the wiring end coiling a lantern ring that encircles the double-screw bolt promptly, directly with the tip bifurcation of lead wire and make the double-screw bolt be located the fork mouth of lead wire, directly insert the tip of lead wire in the clearance of pressing cap and wiring board, the cap is pressed in the position on the double-screw bolt axis in the rethread nut adjustment, can realize the electricity of lead wire and wiring board through pressing cap and wiring board and be connected.
The terminal is arranged to clamp the terminal of the lead wire between the nut and the terminal block in the process of the nut approaching the terminal block by rotating the nut. Simultaneously, set up to still including pressing the cap, press the cap cover to establish on the double-screw bolt, press the cap to be located between connector lug and the nut, set up the material that sets up to pressing the cap simultaneously for copper or aluminium, the material of double-screw bolt, nut is the carbon steel, like this, presses the in-process of cap at the nut extrusion, can make to press the cap to produce plastic deformation in order to increase and press cap and lead wire, press cap and double-screw bolt, press the area of contact between cap and the nut in order to improve the electric conductive property between lead wire and the wiring board.
In this scheme, set up as the side of double-screw bolt has the bead, and when pressing cap and double-screw bolt cooperation, the bead embedding is pressed in the cell body on the cap, like this, press the cap in-process through the nut extrusion, when the side of bead and the side of cell body act on mutually, receive the shear force through the bead, the hindrance is pressed the cap and is rotated along with the nut, thereby reach at the in-process of rotating the nut, avoid pressing the cap to rotate along with the nut and influence the electric connection performance between pressing cap and the lead wire or destroy the lead wire as far as possible, only allow to press the cap to take place to warp and can not make and press the cap to rotate relatively for the double-screw bolt in the deformation process that.
As a person skilled in the art, since the lead wire has a certain thickness after being flattened, it is preferable that the stud has a protruding rib at a part thereof, and the protruding rib is preferably a strip-shaped rib whose length direction is along the axial direction of the stud; meanwhile, the pressing cap needs to be sleeved on the stud, and the convex edge is equivalent to a strip key, so that the groove body is actually a key groove formed in the inner side of the pressing cap.
A plurality of strip-shaped axial grooves are further formed in the outer side of the pressing cap, one end of each axial groove is connected with one end of the pressing cap, and the other end of each axial groove is connected with the other end of the pressing cap;
the plurality of axial grooves are annularly arranged on the outer side surface of the pressing cap;
the pressing cap is characterized by also comprising a sleeve ring, wherein the sleeve ring is arranged on the pressing cap;
one end of the lantern ring close to the screw cap is also provided with an annular blocking edge, and the blocking edge forms an annular step surface on the outer side surface of the lantern ring;
the terminal surface of nut contacts with the terminal surface of pressing the cap, and the terminal surface of lantern ring is located the outside of nut terminal surface.
Because the cap is pressed to take place to warp the back under the effect of nut and press the cap can bond on the double-screw bolt or form the close-fitting relation with the double-screw bolt, above bonding and close-fitting relation influence the removal of connector lug and double-screw bolt relation of being connected, so set up to still including setting up the many axial grooves on pressing the cap outside, when above axial groove is used for connector lug and double-screw bolt separation, through tools such as pincers worker flat shovel, pincers worker crow bar, the destruction is pressed the cap and is made it become non-closed ring and convenient will be pressed the cap and remove on by the double-screw bolt. In this scheme, set up to the axial groove be a plurality ofly, and the annular distribution on pressing the cap, can make operating personnel can destroy by the angle of convenient operation and press the cap or convenient will press the cap to destroy and be the polylith.
As mentioned above, this scheme need press the cap so that it produces plastic deformation and optimizes the electrical connection performance of lead wire and ground stock when using through the nut extrusion, simultaneously including the axial slot on the pressure cap, press the whole ring structure of cap to suffer destruction and influence the electrical connection performance of lead wire and double-screw bolt for avoiding the nut to press in-process pressure cap in the extrusion, in this scheme, set up to still including the lantern ring, above lantern ring is the hoop of cover locating on the pressure cap outside for press the cap radial deformation to provide the restraint, press the intact of the whole ring structure of cap in-process pressure cap in order to keep the nut extrusion.
As described above, since the connection relationship between the lead wire and the stud is removed at last, the pressing cap needs to be damaged, and the tight fit relationship is formed between the collar and the pressing cap after the pressing cap is deformed, in this scheme, an annular stopper edge is further arranged at one end of the collar close to the nut, and an annular step surface is formed on the outer side surface of the collar by the stopper edge. Thus, before the pressing cap is broken, the step surface is knocked by a knocking tool to complete the separation of the sleeve ring and the pressing cap, for example, the knocking force direction of knocking is along the axial direction of the stud and towards the free end of the stud, and the pressing cap is broken after the sleeve ring is separated from the pressing cap. I.e. the above collar solution comprising the ledge facilitates the separation of the press cap from the collar.
The terminal surface of pressing the cap to be close to the one end of wiring board is last to be provided with a plurality of recesses, and each recess is: one end of the groove is connected with the central hole on the pressing cap, and the other end of the groove is connected with the outer side of the pressing cap;
the groove is annularly arranged on the end face of the pressing cap;
the lead wire is a stranded wire. In the scheme, the stranded wire is a stranded wire, the lead wire is a stranded wire, the anchoring position of the anchor rod can be determined according to the actual environment by utilizing the flexible convenient protection device of the stranded wire, and meanwhile, the shape of the section clamped by the pressing cap and the grounding plate on the lead wire is easy to deform when being pressed, so that the aim of improving the contact area of the lead wire and the pressing cap as well as the contact area of the lead wire and the wiring board can be fulfilled; set up to pressing the cap to be close to one of wiring board to serve and still have the recess, above recess not only can expand and press the cap to correspond the area of contact of end portion and lead wire, through the position of injecing each recess both ends, a plurality of recesses are pressing the state of arranging of cap tip simultaneously, after lead wire pressurized produces the local embedding recess that warp, pressing the cap not removing and pressing under the tight circumstances of clamp to lead wire, can avoid lead wire to be connected failure with the wiring board under the circumstances of pulling.
In conclusion, the pressing cap comprises the groove, so that the lead wire on the device has the characteristic of reliable connection; because the lead wire can be directly with the wiring board in this scheme, press cap and double-screw bolt direct contact, simultaneously, owing to press including the recess on the cap, lead wire hookup location is owing to change in obtaining bigger area of contact, and the structure can make the electric conductive property of this device can more easily obtain guaranteeing more above adopting.
The lead wire is preferably formed by a plurality of strands of copper stranded wires, so that the electric connection performance between the lead wire and the wiring board, the stud and the pressing cap can be optimized by utilizing the characteristic of changeability of the copper wires.
For avoiding pressing the cap at the in-process of extrusion lead wire, because the local atress of lead wire is too big and cause the single wire of constituteing the lead wire to be cut off and influence the electric connection quality of lead wire and earth anchor, set up to: the groove surface of the groove and the end surface of the pressing cap are in smooth transition.
As an implementation scheme easy to process, the method comprises the following steps: the grooves are strip-shaped grooves, and the length direction of each groove is located in the radial direction of the pressing cap.
For make press the cap to be close to the one end of lead wire and lead wire can have bigger area of contact, make simultaneously press the cap to be close to the one end of wiring board under the effect of nut, in the radial direction of pressing the cap tip, press all to have comparatively even pressure between cap tip each point and the lead wire in order to obtain the lead wire and press the bigger electrically conductive area of cap, set up to: the pressing cap is in a cone frustum shape with a central hole in the middle, and one end with a larger end face area faces the wiring board. Preferably, the lantern ring is also in a shape of a truncated cone, meanwhile, the length of the lantern ring is equal to that of the pressing cap, and the size of the lantern ring is as follows: after the pressing cap is matched with the lantern ring, the inner side surface of the lantern ring is completely attached to the outer side surface of the pressing cap, so that deformation of each point of the pressing cap can be restrained as much as possible through the lantern ring. Preferably, the bottom of the axial groove is provided with an apex, namely the cross section of the axial groove is triangular, so that the stress concentration at the apex can be utilized in the deformation process of the pressing cap, the pressing cap is cracked, and the subsequent pressing cap is conveniently broken and detached from the stud.
In order to make can be filled by the carbon powder and do benefit to the electric connection performance between lead wire and the earth anchor pole like in the clearance between lead wire and pressure cap, wiring board, the double-screw bolt, wire portion still includes the toner cartridge, toner cartridge and wiring board fixed connection, double-screw bolt, pressure cap all are located the toner cartridge. This scheme is when using, be used for splendid attire carbon dust in the cartridge.
The plurality of wire parts are provided, each toner cartridge is in a container shape with an opening facing, and a wiring groove is formed in the cartridge wall of each toner cartridge;
the wiring grooves are used as communication channels inside and outside the carbon powder box, the lead wires on the wire portions are led into the carbon powder box through the corresponding wiring grooves, and the notch ends of the wiring grooves are located at the upper end of the carbon powder box;
the connection slot on each toner cartridge is arranged at the connection position of each toner cartridge and the wiring board. In the scheme, a plurality of lead parts are arranged, so that a plurality of lead wire connection points are conveniently obtained on the wiring board to realize that the ground anchor rod is connected with the line to be repaired, the equipment or device subjected to the electrical test, the lightning conductor and the equipment subjected to the electric leakage protection through a plurality of lead wires; the ground anchor rod is connected with a plurality of or a plurality of devices or devices which are overhauled the circuit and are subjected to electrical test, the lightning conductor and the device which is subjected to electric leakage protection through a single or a plurality of lead wires, meanwhile, the wiring ends which are connected with the ground anchor rod are not influenced, and the high-quality connection of the lead wires and the ground anchor rod is convenient to realize.
In order to enable the ground anchor rod to more easily penetrate through the hard ground and be embedded into the ground to a certain depth below the ground surface, the ground anchor rod is arranged as follows: the side surface of the lower side of the ground anchor rod is also provided with a spiral rib;
a rotating handle is also fixed on the upper side of the ground anchor rod;
the lower end of the ground anchor rod is a pointed end. In the scheme, the torque is applied to the ground anchor rod through the rotating handle, so that the ground anchor rod is guided by the spiral ribs and is easily embedded into the ground in the rotating process; the above tip can reduce the resistance during the embedding of the earth anchor.
As a connection scheme which is easy to realize and can ensure the electrical connection performance, the connection scheme is as follows: the wiring board is connected with the ground anchor rod through welding connection.
Preferably, the pressing cap is made of copper, namely, the pressing cap is a copper ring.
The invention has the following beneficial effects:
in this scheme, set up as still install hoop and disk body on the ground stock, this scheme is when using, at first, rotate fastening bolt and make fastening bolt not take place to extrude each other with the side of ground stock, after ground stock anchor goes into the certain degree of depth in the underground, trample the mode of disk body or hoop through operating personnel for the ground of disk body contacts with earth's surface, then rotate fastening bolt, make and produce certain normal pressure between fastening bolt and the ground stock side, through the frictional force that the normal pressure produced makes the hoop fixed in the particular position of ground stock. Therefore, when the ground anchor rod is used and the ground anchor rod is laterally pulled as a ground anchor rod, the disk body is synchronously tilted with the ground anchor rod when the ground anchor rod is tilted, and at the moment, because the disk body has a certain contact area with the ground surface, the acting force between the disk body and the ground surface can prevent the ground anchor rod from being further tilted to a certain degree, and particularly when exposed rocks are arranged around the ground anchor rod, the part of the disk body, which is dispersed to the periphery of the ground anchor rod, acts on the rocks, so that the ground anchor rod on the wall surface can be well laterally pulled and can be tilted to a greater degree relative to the original state. The connection mode of the hoop and the ground anchor rod is mutually restricted through the fastening bolt, so that the axial line position of the anchor rod at the position of the disc body can be well adapted to the anchoring depth of the ground anchor rod and the concave-convex condition of the ground surface around the ground anchor rod.
The scheme not only can realize the temporary protection of the ground connection on the spot of corresponding cable or equipment through wiring portion more than promptly, simultaneously when needs ground stock provide the side pulling force, through disk body, hoop and fastening bolt can make ground stock still have the electric conductivity performance of ideal with the ground under can providing the side pulling force, and this scheme of adoption can effectively improve maintainer's operating efficiency.
Drawings
Fig. 1 is a partial schematic view showing the structure of a pressing cap and a collar and the matching relationship between the pressing cap and the collar in an embodiment of the auxiliary device for electric power overhaul as a temporary side-pull ground anchor according to the present invention, and the schematic view is an exploded view;
FIG. 2 is a partial schematic view of one embodiment of an electrical service aid of the present invention that may be used as a temporary side pull anchor, the partial schematic view reflecting the configuration of the wire portions and the relationship of the wire portions to the connection of the terminal block;
FIG. 3 is a schematic structural diagram of an embodiment of an electric power overhaul auxiliary device capable of being used as a temporary side pull ground anchor according to the present invention;
fig. 4 is a side view of a collar in an embodiment of the invention that can be used as a temporary side pull anchor for electrical service.
The reference numbers in the figures are in order: 1. the carbon powder cartridge comprises a pressing cap, 11, a groove, 12, an axial groove, 13, a tank body, 2, a lead wire, 3, a wiring board, 4, a carbon powder cartridge, 41, a wiring groove, 5, a screw cap, 6, a sleeve ring, 61, a stop edge, 7, a stud, 71, a convex edge, 8, a ground anchor rod, 81, a hoop, 82, a fastening bolt, 83, a disk body, 9, a rotating handle, 10 and a spiral ridge.
Detailed Description
The present invention will be described in further detail with reference to examples, but the structure of the present invention is not limited to the following examples.
Example 1:
as shown in fig. 1 to 4, an electric power overhaul auxiliary device capable of serving as a temporary side-pull ground anchor comprises a ground anchor rod 8 and a wiring portion installed on the ground anchor rod 8, wherein the wiring portion comprises a wiring board 3 and a wire portion, the wire portion comprises a stud 7, a nut 5 and a lead wire 2, the wiring board 3 is electrically connected with the ground anchor rod 8, one end of the stud 7 is welded on the wiring board 3, the nut 5 is in threaded connection with the stud 7, the wire portion of the lead wire 2 is clamped between the wiring board 3 and the nut 5, and the electric power overhaul auxiliary device further comprises a hoop 81, a disk body 83 and a fastening bolt 82, the hoop is in a sleeve shape, the disk body 83 is in a disc-shaped structure with a through hole in the middle, the lower end of the hoop is in welded connection with the disk body 83, and the axis of the;
the side wall of the hoop is also provided with a plurality of internal thread holes, the internal thread holes all penetrate through the side wall of the hoop, and each internal thread hole is in threaded connection with one fastening bolt 82;
the hoop 81 and the disc body 83 are sleeved on the ground anchor rod 8 through respective holes, and the disc body 83 is located on the lower side of the hoop 81.
Among the prior art, if overhaul to outdoor power cable, often meet and need set up earthing device in order to carry out ground protection, need set up the side and draw the earth anchor to corresponding conductor portion for provide the cable and prevent rocking restraint etc.. However, for the grounding device, although the ground anchor rod 8 included therein needs to be anchored into the ground, the ground anchor rod 8 should not be subjected to side pulling in consideration of the electrical conductivity between the ground anchor rod 8 and the ground, so as to avoid the ground anchor rod 8 from having a large arc skew relative to the original anchoring state after being anchored. Therefore, in the prior art, the side pull ground anchor and the grounding ground anchor are generally arranged separately, but aiming at the mountainous area where the earth surface is mostly rock, two suitable anchor sites are difficult to find, and the efficiency of outdoor electric power overhaul construction is not facilitated.
In the scheme, the hoop 81 and the disc body 83 are further installed on the ground anchor rod 8, when the scheme is used, firstly, the fastening bolt 82 is rotated to enable the fastening bolt 82 not to be mutually extruded with the side face of the ground anchor rod 8, after the ground anchor rod 8 is anchored into the ground to a certain depth, the disc body 83 or the hoop 81 is trampled by an operator, the ground of the disc body 83 is in contact with the ground surface, then, a certain positive pressure is generated between the fastening bolt 82 and the side face of the ground anchor rod 8 by rotating the fastening bolt 82, and the hoop 81 is fixed at a specific position of the ground anchor rod 8 through the friction force generated by the positive pressure. Thus, when the ground anchor rod 8 is used, when the ground anchor rod 8 is pulled laterally as a ground anchor, the disc 83 is tilted synchronously with the ground anchor rod 8 when the ground anchor rod 8 is tilted, and at this time, because the disc 83 has a certain contact area with the ground surface, the acting force between the disc 83 and the ground surface can prevent the ground anchor rod 8 from further tilting to a certain extent, and particularly when exposed rocks are around the ground anchor rod 8, the part of the disc 83 diverging to the periphery of the ground anchor rod 8 acts on the rocks, so that the ground anchor rod 8 on the wall surface can be well pulled laterally and tilted to a greater extent relative to the original state. The connection mode of the hoop 81 and the ground anchor rod 8 and the mutual constraint through the fastening bolt 82 can enable the axial line position of the anchor rod 8 where the disc body 83 is located to be well adaptive to the anchoring depth of the ground anchor rod 8 and the concave-convex situation of the surrounding ground surface.
Above scheme not only accessible wiring portion realizes corresponding cable or the interim protection of ground connection on the spot of equipment promptly, when needs ground stock 8 to provide the side pulling force simultaneously, through disk body 83, hoop 81 and fastening bolt 82 can make ground stock 8 still have the electric conductivity performance of ideal with the ground under the circumstances that can provide the side pulling force, and this scheme of adoption can effectively improve maintainer's operating efficiency.
Example 2:
as shown in fig. 1 to 4, the present embodiment is further defined on the basis of embodiment 1: the bolt is characterized by further comprising a pressing cap 1, the pressing cap 1 is made of copper or aluminum, the stud 7 and the nut 5 are made of carbon steel, and the pressing cap 1 is annular;
the pressing cap 1 is sleeved on the stud 7, and the pressing cap 1 is positioned between the connector lug and the screw cap 5;
still be provided with bead 71 on the side of double-screw bolt 7, press still be provided with on the cap 1 be used for with bead 71 complex cell body 13, when pressing cap 1 cover to locate on double-screw bolt 7, bead 71 embedding in the cell body 13, just bead 71 is used for hindering through self receiving to cut to press cap 1 to rotate around double-screw bolt 7.
In the related art, a temporary power protection device generally employs a ground anchor 8 as a ground anchor, and a lead wire 2 is used as an electrical connection wire between the ground anchor 8 and a device or apparatus to be grounded corresponding to a line to be inspected. In consideration of convenience of the ground anchor 8 in anchoring, it is generally set that the connection relationship between the ground anchor 8 and the lead wire 2 is a detachable connection relationship: before the ground anchor rod 8 is anchored into the ground, the lead wire 2 is separated from the ground anchor rod 8 so as to facilitate the anchoring of the ground anchor rod 8 and avoid the damage to the lead wire 2 in the anchoring process of the ground anchor rod 8; before the ground anchor rod 8 is pulled out, the lead wire 2 is separated from the ground anchor rod 8, so that the ground anchor rod 8 can be conveniently pulled out, and the lead wire 2 is prevented from being damaged in the process of pulling out the ground anchor rod 8.
However, in the prior art, a connection method of the wiring board 3 and the lead wire 2 is generally adopted, in which a connection base is disposed on the wiring board 3, the connection base includes a rectangular tube-shaped wire inserting cylinder, the wire inserting cylinder is fixedly connected with the wiring board 3, one or more wire pressing screws are connected to the wire inserting cylinder, and after the terminal of the lead wire 2 is inserted into the wire inserting cylinder, the lead wire 2 is fixedly connected with the connection base by applying pressure to the lead wire 2 through the wire pressing screws. Among the above connected mode, because the diameter of line ball screw should not set up too big, so in fact the diameter of line ball screw has injectd the area that has positive pressure between lead wire 2 and the wire barrel, the line ball screw for the reliability of being connected of lead wire 2 and connection terminal is relatively poor, and the hookup location resistance value of lead wire 2 on protection device is great, not only is unfavorable for the security that protection device used, is unfavorable for protection device's grounding performance simultaneously.
In the scheme, the wire portion on the wiring board 3 is the connecting portion used for being electrically connected with the lead wire 2 on the wiring board 3, if through the end portion of the lead wire 2, namely the wiring end winds a lantern ring 6 surrounding the stud 7, the end portion of the lead wire 2 is directly forked and the stud 7 is positioned in the fork of the lead wire 2, the end portion of the lead wire 2 is directly inserted into a gap between the pressing cap 1 and the wiring board 3, the position of the pressing cap 1 on the axis of the stud 7 is adjusted through the screw cap 5, and the lead wire 2 can be electrically connected with the wiring board 3 through the pressing cap 1 and the wiring board 3.
Is arranged to clamp the terminal of the lead wire 2 between the nut 5 and the terminal block 3 during the approach of the nut 5 to the terminal block 3 by rotating the nut 5. Simultaneously, set up to still including pressing cap 1, press 1 covers of cap to establish on double-screw bolt 7, press cap 1 to be located between connector lug and nut 5, set up to pressing cap 1's material simultaneously for copper or aluminium, the material of double-screw bolt 7, nut 5 is the carbon steel, like this, presses the in-process of cap 1 at nut 5 extrusion, can make and press cap 1 to produce plastic deformation in order to increase and press cap 1 and lead wire 2, press cap 1 and double-screw bolt 7, press the area of contact between cap 1 and the nut 5 in order to improve the electric conductive property between lead wire 2 and the wiring board 3.
In the scheme, the convex ribs 71 are arranged on the side surfaces of the studs 7, and when the pressing cap 1 is matched with the studs 7, the convex ribs 71 are embedded into the groove bodies 13 on the pressing cap 1, so that in the process of extruding the pressing cap 1 through the screw cap 5, when the side surfaces of the convex ribs 71 act with the side surfaces of the groove bodies 13, the convex ribs 71 are subjected to shearing force to prevent the pressing cap 1 from rotating along with the screw cap 5, and therefore, in the process of rotating the screw cap 5, the influence of the rotation of the pressing cap 1 along with the screw cap 5 on the electric connection performance between the pressing cap 1 and the lead wires 2 or the damage of the lead wires 2 are avoided as far as possible, namely, the pressing cap 1 is only allowed to deform in the compression deformation process, and the pressing cap 1 cannot.
As a person skilled in the art, since the lead wire 2 has a certain thickness even after being flattened, it is preferable that the stud 7 has a rib 71 at a part thereof, and the rib 71 is preferably a strip-shaped rib whose length direction is along the axial direction of the stud 7; meanwhile, since the pressing cap 1 needs to be sleeved on the stud 7, the protruding edge 71 is equivalent to a bar key, so the above groove body 13 is actually a key groove formed on the inner side of the pressing cap 1.
A plurality of strip-shaped axial grooves 12 are further formed in the outer side of the pressing cap 1, one end of each axial groove 12 is connected with one end of the pressing cap 1, and the other end of each axial groove 12 is connected with the other end of the pressing cap 1;
a plurality of axial grooves 12 are annularly arranged on the outer side surface of the pressure cap 1;
the pressing cap further comprises a lantern ring 6, and the lantern ring 6 is sleeved on the pressing cap 1;
an annular blocking edge 61 is further arranged at one end, close to the screw cap 5, of the lantern ring, and an annular step surface is formed on the outer side surface of the lantern ring 6 by the blocking edge 61;
the end face of the nut 5 is in contact with the end face of the pressing cap 1, and the end face of the lantern ring 6 is located on the outer side of the end face of the nut 5.
Because the cap 1 of pressing takes place to warp under the effect of nut 5 the back and presses cap 1 can bond on double-screw bolt 7 or form the close-fitting relation with double-screw bolt 7, it influences the removal of connector lug and double-screw bolt 7 relation of being connected with the close-fitting relation to bond above, so set up to still including setting up many axial grooves 12 on the cap 1 outside, when above axial groove 12 is used for connector lug and double-screw bolt 7 to separate, through tools such as pincers worker flat shovel, pincers worker crow bar, destroy and press cap 1 and make it become non-closed ring and convenient will press cap 1 to remove on the double-screw bolt 7. In this scheme, set up to axial groove 12 for a plurality ofly, and the annular distribution is on pressing cap 1, can make operating personnel can destroy by the angle of convenient operation and press cap 1 or convenient will press cap 1 to destroy and be the polylith.
As described above, in the present scheme, when in use, the nut 5 is required to extrude the pressing cap 1 so as to enable the pressing cap to generate plastic deformation to optimize the electrical connection performance of the lead wire 2 and the ground anchor rod 8, and meanwhile, the pressing cap 1 comprises the axial groove 12, so as to prevent the whole circular ring structure of the pressing cap 1 from being damaged in the process of extruding the pressing cap 1 by the nut 5 to influence the electrical connection performance of the lead wire 2 and the stud 7, in the present scheme, the pressing cap further comprises the lantern ring 6, the lantern ring 6 is a hoop sleeved on the outer side of the pressing cap 1, and is used for providing constraint for radial deformation of the pressing cap 1 so as to maintain integrity of the whole circular ring structure of the pressing cap 1 in the process of extruding the pressing cap 1.
As described above, since the connection relationship between the lead wire 2 and the stud 7 needs to be removed finally, the pressing cap 1 needs to be damaged, and the collar 6 and the pressing cap 1 form a tight fit relationship after the pressing cap 1 is deformed, in this scheme, an annular stop edge 61 is further provided at one end of the collar close to the nut 5, and the stop edge 61 forms an annular step surface on the outer side surface of the collar 6. In this way, before the pressing cap 1 is broken, the stepped surface is firstly knocked by a knocking tool to complete the separation of the collar 6 and the pressing cap 1, and as the knocking force direction of the knocking is along the axial direction of the stud 7 and towards the free end of the stud 7, the pressing cap 1 is broken after the collar 6 is separated from the pressing cap 1. I.e. the above collar 6 solution comprising the ledge 61 facilitates the separation of the press cap 1 from the collar 6.
the groove 11 is annularly arranged on the end surface of the pressure cap 1;
the lead wire 2 is a stranded wire. In the scheme, the stranded wire is a multi-strand wire, the lead wire 2 is a stranded wire, the flexibility of the stranded wire can be utilized to facilitate the device to determine the anchoring position of the anchor rod 8 according to the actual environment, and meanwhile, the shape of a section clamped by the pressing cap 1 and the grounding plate on the lead wire 2 is easy to deform when being pressed, so that the aim of improving the contact area of the lead wire 2 and the pressing cap 1 as well as the contact area of the lead wire 2 and the wiring board 3 can be fulfilled; set up to pressing cap 1 to be close to one of wiring board 3 and still have recess 11, above recess 11 not only can expand the area of contact who presses cap 1 to correspond the end tip and lead wire 2, through the position of injecing each recess 11 both ends, a plurality of recesses 11 are pressing the state of arranging of cap 1 tip simultaneously, lead wire 2 pressurized and produce the local embedding recess 11 of deformation after, press cap 1 not removing and press under the tight condition of 2 clamps of lead wire, can avoid lead wire 2 to be connected failure with wiring board 3 under the condition of dragging.
In conclusion, the pressing cap 1 comprises the groove 11, so that the lead wire 2 on the device has the characteristic of reliable connection; because lead wire 2 can be direct with wiring board 3 in this scheme, press cap 1 and double-screw bolt 7 direct contact, simultaneously, owing to press including recess 11 on the cap 1, lead wire 2 hookup location can make the electric conductive property of this device more easily obtain guaranteeing owing to change into and obtain bigger area of contact, structure more than adopting.
The lead wire 2 is preferably formed by a plurality of strands of copper stranded wires, so that the electrical connection performance between the lead wire 2 and the wiring board 3, the stud 7 and the pressing cap 1 can be optimized by utilizing the characteristic of copper wire changeability.
In order to avoid pressing cap 1 in the in-process of extrusion lead wire 2, because lead wire 2 local atress too big and cause that the single wire that constitutes lead wire 2 is cut off and influence the electric connection quality of lead wire 2 and earth anchor 8, set up to: the groove surface of the groove 11 and the end surface of the pressing cap 1 are in smooth transition.
As an implementation scheme easy to process, the method comprises the following steps: the grooves 11 are strip-shaped grooves, and the length direction of each groove 11 is located in the radial direction of the pressing cap 1.
For make press cap 1 to be close to the one end of lead wire 2 and lead wire 2 can have bigger area of contact, make simultaneously press cap 1 to be close to the one end of wiring board 3 under the effect of nut 5, at the radial direction of pressing cap 1 tip, all have comparatively even pressure between 1 tip each point of press cap and the lead wire 2 in order to obtain lead wire 2 and the more electrically conductive area of press cap 1, set up to: the pressing cap 1 is in a cone frustum shape with a central hole in the middle, and one end, with a larger end surface area, of the pressing cap 1 faces the wiring board 3. Preferably, the lantern ring 6 is also in a shape of a truncated cone, meanwhile, the length of the lantern ring 6 is equal to that of the pressing cap 1, and the size of the lantern ring 6 is as follows: after the pressing cap 1 is matched with the lantern ring 6, the inner side surface of the lantern ring 6 is completely attached to the outer side surface of the pressing cap 1, so that deformation of each point of the pressing cap 1 can be restrained as much as possible through the lantern ring 6. Preferably, the bottom of the axial groove 12 is provided with a tip, that is, the cross section of the axial groove 12 is triangular, so that during the deformation of the press cap 1, stress concentration at the tip can be utilized, so that the press cap 1 cracks to facilitate the subsequent removal of the press cap 1 from the stud 7.
In order to ensure that the gaps between the lead wire 2 and the pressing cap 1, the wiring board 3 and the stud 7 can be filled with carbon powder to be beneficial to the electric connection performance between the lead wire 2 and the ground anchor rod 8, the wire part also comprises a carbon powder box 4, the carbon powder box 4 is fixedly connected with the wiring board 3, and the stud 7 and the pressing cap 1 are both positioned in the carbon powder box 4. When the carbon powder box is used, the carbon powder box 4 is used for containing carbon powder.
The number of the wire parts is multiple, each toner cartridge 4 is in a container shape with an opening facing, and a wiring groove 41 is formed in the cartridge wall of each toner cartridge 4;
the wiring grooves 41 are used as communication channels of the inner side and the outer side of the toner cartridge 4, the lead wires 2 on each wire portion are led into the toner cartridge 4 through the corresponding wiring grooves 41, and the notch end of each wiring groove 41 is positioned at the upper end of the toner cartridge 4;
the opening position of the wiring groove 41 on each toner cartridge 4 is located at the connecting position of each toner cartridge 4 and the wiring board 3. In the scheme, a plurality of lead parts are arranged, so that a plurality of lead wire 2 connection points are conveniently obtained on the wiring board 3 to connect the ground anchor rod 8 with the line to be repaired, the equipment or device to be subjected to the electrical test, the lightning conductor and the equipment to be subjected to the electric leakage protection through the plurality of lead wires 2; the ground anchor rod 8 is connected with a plurality of or a plurality of devices or devices which are overhauled circuits and are subjected to electrical tests, lightning conductors and devices which are protected by electric leakage through a single or a plurality of lead wires 2, meanwhile, wiring ends of the lead wires 2 connected with the ground anchor rod 8 are not influenced mutually, and the high-quality connection of the lead wires 2 and the ground anchor rod 8 is facilitated.
In order to make the ground anchor rod 8 more easily penetrate through the hard ground and be embedded to a certain depth below the ground surface, the arrangement is that: the side surface of the lower side of the ground anchor rod 8 is also provided with a spiral rib 10;
a rotating handle 9 is also fixed on the upper side of the ground anchor rod 8;
the lower end of the ground anchor rod 8 is a tip. In the scheme, the torque is applied to the ground anchor rod 8 through the rotating handle 9, so that the ground anchor rod 8 is guided by the spiral ribs 10 in the rotating process and is easily embedded into the ground; the above tip can reduce resistance during insertion of the anchor 8.
As a connection scheme which is easy to realize and can ensure the electrical connection performance, the connection scheme is as follows: the terminal plate 3 is connected to a ground anchor 8 by a welded connection.
Preferably, the material of the pressing cap 1 is copper, that is, the pressing cap 1 is a copper ring.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the scope of the invention are intended to be encompassed by the scope of the invention.
Claims (8)
1. The utility model provides a can regard as electric power maintenance auxiliary device of interim side-pulling earth anchor, includes earth anchor (8) and installs the wiring portion on earth anchor (8), wiring portion includes wiring board (3) and wire portion, wire portion includes double-screw bolt (7), nut (5) and lead wire (2), wiring board (3) are connected with earth anchor (8) electricity, and the one end of double-screw bolt (7) welds on wiring board (3), and nut (5) threaded connection is on double-screw bolt (7), the terminal head of lead wire (2) is by centre gripping between wiring board (3) and nut (5), its characterized in that still includes hoop (81), disk body (83) and fastening bolt (82), hoop (81) are the cover tube form, disk body (83) are the discoid structure that the middle part is provided with the through-hole, and the lower extreme and disk body (83) welded connection of hoop (81), and the axis of the hoop (81) is collinear with the axis of the through hole;
the side wall of the hoop (81) is also provided with a plurality of internal thread holes, the internal thread holes all penetrate through the side wall of the hoop (81), and each internal thread hole is in threaded connection with a fastening bolt (82);
the hoop (81) and the disc body (83) are sleeved on the ground anchor rod (8) through respective holes, and the disc body (83) is positioned on the lower side of the hoop (81); the bolt is characterized by further comprising a pressing cap (1), the pressing cap (1) is made of copper or aluminum, the stud (7) and the nut (5) are made of carbon steel, and the pressing cap (1) is annular;
the pressing cap (1) is sleeved on the stud (7), and the pressing cap (1) is located between the connector lug and the screw cap (5);
a convex rib (71) is further arranged on the side face of the stud (7), a groove body (13) matched with the convex rib (71) is further arranged on the pressing cap (1), when the pressing cap (1) is sleeved on the stud (7), the convex rib (71) is embedded into the groove body (13), and the convex rib (71) is used for preventing the pressing cap (1) from rotating around the stud (7) through self shearing; a plurality of strip-shaped axial grooves (12) are further formed in the outer side of the pressing cap (1), one ends of the axial grooves (12) are connected with one end of the pressing cap (1), and the other ends of the axial grooves (12) are connected with the other end of the pressing cap (1);
a plurality of axial grooves (12) are annularly arranged on the outer side surface of the pressure cap (1);
the pressing cap is characterized by further comprising a lantern ring (6), wherein the lantern ring (6) is sleeved on the pressing cap (1);
one end of the lantern ring (6) close to the nut (5) is also provided with an annular blocking edge (61), and the blocking edge (61) forms an annular step surface on the outer side surface of the lantern ring (6);
the end face of the nut (5) is in contact with the end face of the pressing cap (1), and the end face of the lantern ring (6) is located on the outer side of the end face of the nut (5).
2. An electric power overhaul auxiliary device capable of serving as a temporary side pull ground anchor according to claim 1, wherein the end face of one end, close to the wiring board (3), of the pressing cap (1) is provided with a plurality of grooves (11), and each groove (11) is as follows: one end of the groove (11) is connected with a central hole on the pressure cap (1), and the other end of the groove (11) is connected with the outer side of the pressure cap (1);
the groove (11) is annularly arranged on the end surface of the pressure cap (1);
the lead wire (2) is a stranded wire.
3. An electric service auxiliary device capable of being used as a temporary side-pull ground anchor according to claim 2, characterized in that the groove surface of the groove (11) is smoothly transited with the end surface of the pressing cap (1).
4. An electric power overhaul auxiliary device capable of being used as a temporary side-pull ground anchor according to claim 2, wherein the grooves (11) are all strip-shaped grooves, and the length direction of each groove (11) is located in the radial direction of the pressing cap (1).
5. An electric power overhaul auxiliary device capable of being used as a temporary side-pull ground anchor according to claim 1, wherein the pressing cap (1) is in a cone frustum shape with a central hole in the middle, and one end of the pressing cap (1) with larger area faces the wiring board (3).
6. The electric power overhaul auxiliary device capable of serving as a temporary side-pull ground anchor is characterized in that the wire part further comprises a toner cartridge (4), the toner cartridge (4) is fixedly connected with a wiring board (3), and the stud (7) and the pressing cap (1) are both positioned in the toner cartridge (4).
7. The auxiliary device for electric power overhaul as a temporary side-pull ground anchor according to claim 6, wherein the wire portion is provided in plurality, each toner cartridge (4) is in the shape of a container with an opening facing, and a wiring groove (41) is provided on the cartridge wall of each toner cartridge (1);
the wiring grooves (41) are used as communication channels of the inner side and the outer side of the toner cartridge (4), the lead wires (2) on each wire portion are led into the toner cartridge (4) through the corresponding wiring grooves (41), and the notch end of each wiring groove (41) is positioned at the upper end of the toner cartridge (4);
the connection slot (41) on each toner cartridge (4) is arranged at the connection position of each toner cartridge (4) and the wiring board (3).
8. An electric power overhaul auxiliary device capable of being used as a temporary side-pull ground anchor according to any one of claims 1 to 7, wherein the side surface of the lower side of the ground anchor rod (8) is further provided with a spiral rib (10);
a rotating handle (9) is also fixed on the upper side of the ground anchor rod (8);
the lower end of the ground anchor rod (8) is a pointed end;
the terminal plate (3) is connected with a ground anchor rod (8) through welding connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811119315.2A CN109244930B (en) | 2018-09-25 | 2018-09-25 | Electric power that can regard as interim side to draw earth anchor overhauls auxiliary device |
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| CN201811119315.2A CN109244930B (en) | 2018-09-25 | 2018-09-25 | Electric power that can regard as interim side to draw earth anchor overhauls auxiliary device |
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| CN109244930B true CN109244930B (en) | 2020-12-04 |
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| DE19633517A1 (en) * | 1996-08-09 | 1998-02-12 | Herland Gmbh | Ground anchor for cable markers |
| JP4132969B2 (en) * | 2002-05-21 | 2008-08-13 | 旭テック株式会社 | Columnar standing apparatus and columnar standing method |
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| CN201818628U (en) * | 2010-09-17 | 2011-05-04 | 刘明杰 | Rivet nut connecting plate capable of preventing spinning of circular rivet nut |
| CN202888415U (en) * | 2012-07-27 | 2013-04-17 | 长沙中联消防机械有限公司 | Grounding device |
| CN202816592U (en) * | 2012-09-14 | 2013-03-20 | 保定天威集团有限公司 | Low-voltage lead copper bar connecting device for transformer |
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| CN109244930A (en) | 2019-01-18 |
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